Science.gov

Sample records for aislada mediante energia

  1. 77 FR 74472 - Application to Export Electric Energy; Energia Renovable S.C., LLC

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-14

    ... Application to Export Electric Energy; Energia Renovable S.C., LLC AGENCY: Office of Electricity Delivery and... Renovable) has applied for authority to transmit electric energy from the United States to Mexico pursuant... application from Energia Renovable for authority to transmit electric energy from the United States to Mexico...

  2. Energia Renovable para Centros de Salud Rurales (Renewable Energy for Rural Health Clinics)

    SciTech Connect

    Jimenez, T.; Olson, K.

    1999-07-28

    Esta es la primera de una serie de guias de aplicaciones que el Programa de Energia de Villas de NREL esta comisionando para acoplar sistemas comerciales renovables con aplicaciones rurales, incluyendo agua, escuelas rurales y micro empresas. La guia esta complementada por las actividades de desarrollo del Programa de Energia de Villas de NREL, proyectos pilotos internacionales y programas de visitas profesionales.

  3. Russian RSC Energia employees inspect DM in SSPF

    NASA Technical Reports Server (NTRS)

    1995-01-01

    Employees of the Russian aerospace company RSC Energia prepare to conduct final inspections of the Russian-built Docking Module in the Space Station Processing Facility at KSC. The module will fly as a primary payload on the second Space Shuttle/Mir space station docking mission, STS-74, which is now scheduled for liftoff in the fall of 1995. During the mission, the module will first be attached with the orbiter's robot arm to the Orbiter Docking System (ODS) in the payload bay of the orbiter Atlantis and then be docked with the Mir. When Atlantis undocks from the Mir, it will leave the new docking module permanently attached to the space station for use during future Shuttle Mir docking missions. The new module will simplify future Shuttle linkups with Mir by improving orbiter clearances when it serves as a bridge between the two space vehicles.

  4. Russian RSC Energia employees attach trunnions to DM

    NASA Technical Reports Server (NTRS)

    1995-01-01

    Employees of the Russian aerospace company RSC Energia attach trunnions to the Russian-built docking module in the Space Station Processing Facility at KSC so that it can be mounted in the payload bay of the Space Shuttle orbiter Atlantis. The module will fly as a primary payload on the second Space Shuttle/Mir space station docking mission, STS-74, which is now scheduled for liftoff in the fall of 1995. During the mission, the module will first be attached with the orbiter's robot arm to the Orbiter Docking System (ODS) in the payload bay of the orbiter Atlantis and then be docked with the Mir. When Atlantis undocks from the Mir, it will leave the new docking module permanently attached to the space station for use during future Shuttle Mir docking missions. The new module will simplify future Shuttle linkups with Mir by improving orbiter clearances when it serves as a bridge between the two space vehicles.

  5. Russian RSC Energia employees inspect DM in SSPF

    NASA Technical Reports Server (NTRS)

    1995-01-01

    Employees of the Russian aerospace company RSC Energia prepare to conduct final inspections of the Russian-built Docking Module in the Space Station Processing Facility at KSC. The module will fly as a primary payload on the second Space Shuttle/Mir space station docking mission, STS-74, which is now scheduled for liftoff in the fall of 1995. During the mission, the module will first be attached with the orbiter's robot arm to the Orbiter Docking System (ODS) in the payload bay of the orbiter Atlantis and then be docked with the Mir. When Atlantis undocks from the Mir, it will leave the new docking module permanently attached to the space station for use during future Shuttle Mir docking missions. The new module will simplify future Shuttle linkups with Mir by improving orbiter clearances when it serves as a bridge between the two space vehicles.

  6. 77 FR 23476 - Energia Sierra Juarez U.S., LLC; Supplemental Notice That Initial Market-Based Rate Filing...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-19

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission Energia Sierra Juarez U.S., LLC; Supplemental Notice That Initial Market... in the above-referenced proceeding of Energia Sierra Juarez U.S., LLC's application for market-based...

  7. Petropower energia project under way in Chile promises refiner better economics at lower cost

    SciTech Connect

    1996-12-31

    Construction of the Republic of Chile`s first public/private industrial partnership project is well under way. Ground was broken for the $232-million Petropower Energia Limitada project early this year, shortly after the final contract between the parties - Foster Wheeler Power Systems, Inc. (FWPS); Petrox S.A. Refineria de Petroleo and Empresa Nacional del Petroleo (ENAP) - was signed. The Petropower project, located adjacent to Petrox`s 84,000-b/d refinery in Talcahuano, represents the first project ever to combine petroleum coking technology with cogeneration technology in a single project financing. Petropower is 85% owned by FWPS, 7.5% by ENAP, the Chilean national oil company and parent of Petrox S.A. When completed in mid-1998, the Petropower project will enable Petrox to refine heavier crudes and enhance the refinery`s flexibility and economics. The project will consist of a delayed coking facility (a 12,000-b/d delayed coking unit and a 7,000-b/d hydrotreating plant) and a 67-MW (59 MW net) cogeneration plant. The coke produced will fuel a Foster Wheeler proprietary-design circulating fluidized-bed (CFB) boiler which will generate all the high-pressure steam and electric power needs of the Petrox refinery. This unit will be the first circulating fluidized-bed boiler to be built in Latin America. The cogeneration facility, using limestone as a reagent and equipped with a baghouse, will control SO{sub x} emissions from combustion of the green coke fuel and easily meet all Chilean environmental standards. Moreover, by constructing the cogeneration facility, Petrox will not have to proceed with capital improvements to existing facilities to ensure a reliable source of steam and electricity, resulting in substantial savings for Petrox. The cogeneration plant provides a permanent {open_quotes}disposal{close_quotes} for all coke produced by the delayed coker, thereby solving any future problems of unwanted or excess coke.

  8. La teoria economica y el enfoque Box-Jenkins en la modelizacion de la demanda de productos energeticos: el fuel-oil y la energia electrica en Espana

    NASA Astrophysics Data System (ADS)

    Garcia-Pardo, Maria Jimena

    Esta tesis trata de integrar la teoria economica el enfoque box-jenkins del analisis de series temporales y un conjunto de datos de la economia espanola en un intento de elaborar modelos empiricos de demanda de productos energeticos con especial atencion a la deteccion y medicion de los efectos precio. Se analizan para ello las demandas de tres productos: la energia electrica el fuel - oil utilizado en las centrales termicas para la generacion de electricidad y el fuel - oil no termico. El periodo muestral es el comprendido entre enero de 1970 y diciembre de 1977.

  9. A estabilidade dos PAHS em função da energia da radiação interestelar nas faixas UV e raios-X

    NASA Astrophysics Data System (ADS)

    Pinotti, R.; Costa, R. K.; Boechat-Roberty, H. M.; Lago, A.; Souza, G. B.

    2003-08-01

    A nebulosa CRL 618, uma proto-nebulosa planetária cuja nuvem molecular espessa envolve uma estrela B0, contém uma grande quantidade de C2H2 e CH4. Estas moléculas são consideradas os tijolos da criação de grandes moléculas carbonadas como os Hidrocarbonetos Policíclicos Aromáticos (PAHs). Esta nebulosa, por estar exposta a intensos campos de UV e Raios-X, é uma região de fotodissociação molecular que propicia a formação de novas moléculas, confirmada pela presença de C4H2 e C6H6 (Benzeno), que é a unidade básica dos PAHs. Atribui-se a esta família de moléculas orgânicas duas propriedades fundamentais, a resistência para sobreviver ao campo de radiação UV interestelar e a geração das bandas de emissão não identificadas (UIR) observadas no infravermelho. No entanto, alguns autores questionam a resistência dos PAHs ao campo de radiação UV interestelar. Empregando a técnica de Espectrometria de Massas por Tempo de Vôo, no modo de coincidência fotoelétron-fotoíon, estudamos a ionização e fragmentação das seguintes moléculas: Benzeno, Benzeno deuterado, Naftaleno, Antraceno e Fenantreno. Utilizamos uma fonte de Hélio monocromática em 21,21 eV (584,5 Å) e a radiação Síncroton do Laboratório Nacional de Luz Síncroton (LNLS) em diferentes energias nas proximidades da borda do C 1s ( 290 eV). Comprovamos a estabilidade dos PAHs sob ação de UV (21,21 eV), onde eles apresentam um baixo nível de fotodissociação, produzindo fragmentos ionizados com rendimento total na ordem de 5 por cento em relação ao íon molecular pai. Entretanto, em altas energias, na faixa de Raios-X, a quebra destas moléculas torna-se mais intensa, com a produção de muitos fragmentos. Como uma das rotas de fragmentação do Naftaleno é [(C10H8) = > (C6H6+) + (C4H2) + (e-)], e como temos as evidências observacionais da existência do C4H2 e C6H6 na nebulosa CRL 618, sugerimos que este ambiente também possui o Naftaleno.

  10. Determinación de la orientación global SAO-Hipparcos mediante una expansión en armónicos vectoriales

    NASA Astrophysics Data System (ADS)

    Cionco, R. G.; Vucetich, H.; Orellana, R.; Arias, E. F.

    En base a las diferencias de posición y movimientos propios de 101352 estrellas con posición SAO observadas por HIPPARCOS y utilizando la naturaleza vectorial de esas diferencias, determinamos 6 parámetros de orientación global (3 de rotación y 3 de desplazamiento axial), para los sistemas de referencia asociados a los marcos mencionados, mediante una descomposición en serie de armónicos vectoriales ortogonales.

  11. Detección y estudio mediante Fluorescencia Inducida por Láser de radicales libres formados por Disociación Multifotónica Infrarroja

    NASA Astrophysics Data System (ADS)

    Santos, M.; Díaz, L.; Torresano, J. A.; Rubio, L.; Samoudi, B.

    Una de las principales aplicaciones actuales de los procesos de disociación multifotónica inducidos por radiación láser infrarroja (DMI) es la producción de radiales libres, con el fin de estudiar sus propiedades cinéticas y espectroscópicas. La disociación de moléculas poliatómicas en el IR con láseres de CO2 tiene lugar desde la superficie de energía molecular mas baja y conduce generalmente a la formación de fragmentos en el estado electrónico fundamental, con diversos grados de excitación vibracional. En el Grupo de Procesos Multifotónicos del Instituto de Estructura de la Materia del C.S.I.C. hemos puesto a punto la técnica de Fluorescencia Inducida por Láser (LIF) para la detección y análisis en tiempo real de los fragmentos producidos en la DMI inducida mediante uno o dos campos láseres de diferentes longitudes de onda. Objetivos de nuestro trabajo han sido el estudio de los canales de disociación mayoritarios y de las especies transitoria producidas, así como de la distribución de energía interna con que éstas son generadas. En particular hemos detectado mediante LIF las especies: C2, CF, CH, SiH2, CF2, CH2, SiHCl, y CF3 a partir de la disociación de, entre otras, las siguientes moléculas: C2H3Br, C3F6, C4H8Si, C2H5ClSi y CH5ClSi. En este trabajo presentamos algunos de los resultados obtenidos mediante el estudio por LIF de estos radicales: estudio temporal de la señal LIF obtenida con determinación de tiempos de vida, espectros de excitación y fluorescencia, temperaturas vibracionales de formación, variación de la intensidad LIF con el tiempo de retraso entre los láseres de disociación y prueba, etc.

  12. Prevalencia de alteraciones en la interfase vitreoretiniana detectadas mediante tomografía de coherencia óptica de dominio espectral.

    PubMed

    Jacob, Julie; Stalmans, Peter

    2017-07-11

    Objetivo: El objetivo principal del presente estudio consistió en determinar la prevalencia de los cambios en la interfase vitreomacular (IVM) mediante tomografía de coherencia óptica (OCT) en la población general. En segundo lugar, se describieron otros cambios de la OCT. Métodos: Las anomalías en la IVM se diagnosticaron mediante OCT y se distribuyeron de acuerdo con la clasificación del grupo International Vitreomacular Traction Study (estudio internacional de tracción vitreomacular, IVTS, por sus siglas en inglés) y se dividieron en 3 grados según John et al. [Retina 2014;34:442-446]. Resultados: La prevalencia calculada de anomalías vitreomaculares en la población belga de ≥50 años fue del 1,17% [intervalo de confianza (IC 0,38-3,62)] en el caso de tracción vitreomacular (TVM) focal de grado 1; del 0,39% (IC 0,05-2,76) en el caso de TVM focal de grado 2; del 8,17% (IC 5,33-12,53) en el caso de adhesión vitreomacular focal; y del 17,9% (IC 13,41-23,9) en el caso de adhesión vitreomacular difusa. Conclusiones: Se presentó la prevalencia de anomalías vitreomaculares en un estudio de cohortes belga. Estos resultados concuerdan en gran medida con los datos presentados previamente sobre la prevalencia de la TVM. Un conocimiento correcto sobre la epidemiología de las alteraciones en la IVM y un diagnóstico temprano permitirán una intervención satisfactoria. © 2017 S. Karger AG, Basel.

  13. Cúmulos globulares en galaxias elípticas aisladas: el peculiar caso de NGC7507

    NASA Astrophysics Data System (ADS)

    Caso, J. P.; Richtler, T.; Bassino, L.

    We present results of the study of the glolular cluster system of NGC7507. The number of members of the system is calculated; and compared with other elliptical galaxies from literature. FULL TEXT IN SPANISH

  14. Ahorre Energia: Consejos sobre el ahorro de dinero y energia en el hogar (Book)

    SciTech Connect

    Not Available

    2014-09-01

    Learn how to save money with Energy Saver: Tips on Saving Money & Energy at Home, from the U.S. Department of Energy. The Energy Saver guide will help you reduce your monthly energy costs and live more efficiently. This guide takes you through the systems and appliances that consume the most energy in your home, and provides solutions to cut costs for you while saving the environment. The Energy Saver guide also includes transportation tips to help you save money at the pump.

  15. Energia geotermica at the present time: Geothermal Today (Spanish version); La energia geotermica en la actualidad

    SciTech Connect

    Not Available

    2003-09-01

    This outreach publication highlights federal program milestones and accomplishments of the DOE Geothermal Technologies Program for 2003. This is a special 8-page Spanish supplement for the audience at the Geothermal Resources Council/Geothermal Energy Association Annual Meeting and Industry Exhibit, Morelia, Mexico.

  16. Mediants Make (Number) Sense of Fraction Foibles

    ERIC Educational Resources Information Center

    McDowell, Eric L.

    2016-01-01

    By the time they reach middle school, all students have been taught to add fractions. However, not all have "learned" to add fractions. The common mistake in adding fractions is to report that a/b + c/d is equal to (a + c)/(b + d). It is certainly necessary to correct this mistake when a student makes it. However, this occasion also…

  17. Mediants Make (Number) Sense of Fraction Foibles

    ERIC Educational Resources Information Center

    McDowell, Eric L.

    2016-01-01

    By the time they reach middle school, all students have been taught to add fractions. However, not all have "learned" to add fractions. The common mistake in adding fractions is to report that a/b + c/d is equal to (a + c)/(b + d). It is certainly necessary to correct this mistake when a student makes it. However, this occasion also…

  18. Energia di un sisma e oscillazioni di un pendolo

    NASA Astrophysics Data System (ADS)

    Sigismondi, Costantino; Petracca, Francesco Luigi

    2016-11-01

    The energy released from an earthquake is related to the amplitude of the oscillations of the ground at a given distance from the epicenter. The measurements of chandelier's oscillations in Rome, for the L'Aquila 2009 and Amatrice and Norcia 2016 quakes, are used to obtain their magnitudes.

  19. Apoyando La Energia Sostenible Para Todos (Spanish Fact Sheet)

    SciTech Connect

    Not Available

    2012-06-01

    The Clean Energy Solutions Center, an initiative of the Clean Energy Ministerial and UN-Energy, helps governments design and adopt policies and programs that support the deployment of transformational low-carbon technologies. The Solutions Center serves as a first-stop clearinghouse of clean energy policy reports, data, and tools and provides expert assistance and peer-to-peer learning forums. This factsheet highlights key Solutions Center offerings, including 'ask an expert' assistance on clean energy policy matters, training and peer learning, and technical resources for policy makers worldwide.

  20. Servicos Do Centro De Solucoes De Energia Limpa (Fact Sheet)

    SciTech Connect

    Not Available

    2014-06-01

    This is the Portuguese translation of the Clean Energy Solutions Center Services fact sheet. The Solutions Center helps governments, advisors and analysts create policies and programs that advance the deployment of clean energy technologies. The Solutions Center partners with international organizations to provide online training, expert assistance, and technical resources on clean energy policy.

  1. A New Method for Global Optimization Based on Stochastic Differential Equations.

    DTIC Science & Technology

    1984-12-01

    energia potenziale in- tramolecolare mediante un nuovo metodo di minimizzazione globale (Search for minimum-intramolecular-potential pat- terns by means of...Optimizacion Global de Funciones, Universidad Nacional Autonoma de M~xico, Instituto de Investigaciones en Matematicas Aplicadas y en Sistemas, Report...con la sigla SPS (Suigar-Phosphate-Sugar). Per questo frammento Matsuoka, Tosi e Clementi calcoldrono, con un metodo quantomeccanico ab-ini tio(.4.i

  2. Meningococco B: controllo di due focolai epidemici mediante vaccinazione

    PubMed Central

    2014-01-01

    Riassunto La problematica di un efficace approccio vaccinale nei confronti del Meningococco B (MenB) è stata superata identificando con la metodica della "reverse vaccinology" alcuni antigeni capaci di indurre una risposta verso la maggior parte dei ceppi di MenB circolanti nel mondo. Il nuovo vaccino MenB a 4 componenti (4CMenB) è stato autorizzato in Europa, Australia e Canada, ed è entrato nei calendari di immunizzazione pediatrica internazionali: Australia, Canada, UK. In Italia, le prime regioni che hanno raccomandato la vaccinazione contro il MenB sono state Basilicata e Puglia. La gestione di epidemie/focolai epidemici richiede la messa in atto di una risposta rapida da parte delle autorità sanitarie nei confronti di una emergenza sanitaria ad elevato impatto, anche emotivo, sulla popolazione, come recentemente dimostrato in due università americane. Alla dichiarazione di focolaio epidemico in atto, in entrambi i contesti si è attivata una procedura per l'uso del vaccino 4CMenB non ancora autorizzato negli USA. È stato così possibile organizzare gli interventi di profilassi attiva nei due campus universitari, adottando il primo impiego su larga scala del nuovo vaccino 4CMenB e conseguendo, in tempi relativamente brevi, elevati tassi di copertura vaccinale. A fronte di circa 14000 studenti immunizzati con almeno una dose, non è stata segnalata alcuna problematica di eventi avversi conseguenti all'immunizzazione; ad oggi non si sono verificati casi nei soggetti che hanno ricevuto il vaccino. Come conseguenza dei due focolai descritti, è oggi in corso la valutazione da parte dell'FDA per l'estensione dell'uso del vaccino 4CMenB negli Stati Uniti negli adolescenti e giovani adulti. PMID:25916017

  3. Traduccion automatica mediante el ordenador (Automatic Translation Using a Computer).

    ERIC Educational Resources Information Center

    Bueno, Julian L.

    This report on machine translation contains a brief history of the field; a description of the processes involved; a discussion of systems currently in use, including three software packages on the market (Teaching Assistant, Translate, and Globalink); reflections on implications for teaching; observations of results obtained when elements of…

  4. [Prognostic factors associated with postoperative morbidity in children with isolated ventricular septal defect].

    PubMed

    Castro-Rodríguez, Claudia Olimpia; Rodríguez-Hernández, Lydia; Estrada-Loza, María Jesús; Herrera-Márquez, Julia Rocío; Gómez-Salvador, Maricela; Flores-Lujano, Janet; Núñez-Enríquez, Juan Carlos

    2015-01-01

    Introducción: la comunicación interventricular aislada (CIV) es una de las cardiopatías congénitas más frecuentes a nivel mundial. Se desconoce cuáles son los factores pronósticos asociados a la morbilidad postoperatoria de los pacientes con CIV aislada en el Hospital de Pediatría del Centro Médico Nacional Siglo XXI. Métodos: se realizó un estudio de cohorte retrospectivo del 1 de enero de 2009 al 31 de diciembre de 2013. Se utilizó estadística descriptiva y comparaciones entre los grupos mediante chi cuadrada, U de Mann Whitney y regresión lineal. Se calcularon riesgos relativos (RR) e intervalos de confianza al 95 % (IC 95%). Resultados: se incluyeron 64 pacientes a quienes se les realizó cierre de comunicación interventricular aislada. El 12.5 % (n = 8) tenían antecedente de cerclaje pulmonar y 22 (34.3 %) pacientes tenían síndrome de Down. Las CIV perimembranosas y la subaórtica se presentaron en 70 % de los casos. Los factores asociados a una mayor morbilidad y estancia prolongada en terapia intensiva fueron: lactato al final de la circulación extracorpórea (CEC) mayor a 3mmol/L (p = 0.02) y el síndrome de Down (p = 0.02) quienes presentaron una mayor frecuencia de complicaciones postoperatorias (p = 0.02). Conclusiones: se encontró una asociación estadísticamente significativa: cuanto mayor era la clase funcional preoperatoria, mayor era su estancia intrahospitalaria, con mayor número de días en terapia intensiva y mayor tiempo de ventilación mecánica asistida.

  5. Analisis de las distribuciones espectrales de energia de nucleos pre-estelares

    NASA Astrophysics Data System (ADS)

    Saldano, H. P.; Gómez, M. N.

    In this contribution we present the Spectral Energy Distributions (SEDs) modeling of 4 massive stellar objects; in their initial evolutionary stages; obtained from the 1.2 mm catalogue of Beltran_2006 Beltran_2006. The Herschel images at 70 - 500 m; combined with those obtained by WISE; allow us to build the SEDs. We use the code of Whitney_2003a Whitney_2003a to model them. For the youngest objects; instead; we apply a simple modified black body model. We estimate the envelope circumstellar parameters which characterize these massive stars and identify the evolutionary stage of each object according to the sequence proposed by Chambers_2009 Chambers_2009. FULL TEXT IN SPANISH

  6. La energia geotermica en la actualidad: Geothermal Today (Spanish version - 2003)

    SciTech Connect

    2003-09-01

    Por encargo del Secretario Abraham, la Oficina de Eficiencia Energética y Energía Renovable suministra el liderazgo a nivel nacional para impulsar las tecnologías de eficiencia energética y energía renovables, para saltar por encima de las limitaciones del status quo, y para alcanzar beneficios ambientales notables. El Programa de Tecnologías Geotérmicas, parte crítica de nuestro esfuerzo conjunto, está avanzando a grandes zancadas para aumentar la viabilidad y el despliegue de electricidad ...

  7. Servicios del Centro de Soluciones Para la Energia Limpia (Spanish Translation)

    SciTech Connect

    2016-03-01

    This is a Spanish translation of the Clean Energy Solutions Center fact sheet. The Solutions Center offers no-cost expert policy assistance, webinars and training forums, clean energy policy reports, data, and tools provided in partnership with more than 35 leading international and regional clean energy organizations.

  8. Servicios del Centro de Soluciones Para la Energia Limpia (Fact Sheet)

    SciTech Connect

    Not Available

    2014-05-01

    This is the Spanish translation of the Clean Energy Solutions Center Services fact sheet. The Clean Energy Solutions Center (Solutions Center) helps governments, advisors and analysts create policies and programs that advance the deployment of clean energy technologies. The Solutions Center partners with international organizations to provide online training, expert assistance, and technical resources on clean energy policy.

  9. Renewable Energy for Rural Health Clinics (Energia Removable para Centros de Salud Rurales)

    SciTech Connect

    Jimenez, A. C.; Olson, K.

    1998-09-01

    This guide provides a broad understanding of the technical, social, and organizational aspects of health clinic electrification, especially through the use of renewable energy sources. It is intended to be used primarily by decision makers within governments or private agencies to accurately assess their health clinic's needs, select appropriate and cost-effective technologies to meet those needs, and to put into place effective infrastructure to install and maintain the hardware. This is the first in a series of rural applications guidebooks that the National Renewable Energy Laboratory (NREL) Village Power Program is commissioning to couple commercial renewable systems with rural applications. The guidebooks are complemented by NREL's Village Power Program's development activities, international pilot projects, and visiting professionals program. For more information on the NREL Village Power Program, visit the Renewables for Sustainable Village Power web site at http://www.rsvp.nrel .gov/rsvp/.

  10. Turbine generator evaluation for the Eesti-Energia Estonia and Baltic power plants. Export trade information

    SciTech Connect

    1995-12-01

    The report evaluates the feasibility of 200 MW turbines and generators modernization in two Estonian power plants in order to improve performance and/or availability. This is Volume 1 and it includes the following: (1) scope; (2) evaluation approach; (3) summary of major recommendations; (4) performance tests descriptions; (5) current technology -- component description; (6) recommended studies; (7) recommendations; (8) district heating; (9) description of turbine K-200-130; (10) turbine evaluation results; (11) generator; (12) estimation of modernization costs.

  11. 77 FR 49789 - Record of Decision for Issuing a Presidential Permit to Energia Sierra Juarez U.S. Transmission...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-17

    ... supply system under normal and contingency conditions, and any other factors that DOE considers relevant... soils have a high potential to corrode steel, but potential impacts of corrosion on operation of the... factors that DOE may consider relevant to the public interest. DOE has determined that the...

  12. Estudio de generacion de energia con celdas de combustible con membrana poly diallydimethylammonium chloride (PDADMAC) como polimero de intercambio protonico

    NASA Astrophysics Data System (ADS)

    Nino Galeano, Miguel Angel

    Fuel cells were built with poly diallydimethylammonium chloride or PDADMAC (by its initials in English) as proton exchange membrane and were compared with earlier studies of fuel cells constructed by other methods and / or materials. Also copper, aluminum and nickel were used as electrodes in the electrode membrane ensamble in search of the best performance operational cell. The results of the current were used to justify the use of PDADMAC membranes in 40% volume-volume ratio in different combinations of metals Cu-Al, Ni-Al as electrodes. For the study of conduction performance of membrane electrode ensambles (MEA), copper and aluminum were as cathode and anode for their active behavior as functional electrodes in the experimental cell, walling individually membrane types PDADMAC, PDADMAC + Buffer, PDADMAC + deionized water and PDADMAC + tap water.

  13. (seminario usos de la energia solar en la vivienda) solar energy applications for dwellings. Seminar 17-19 nov 80

    SciTech Connect

    Not Available

    1980-11-01

    Contents include: National Ecoplan; National Urban Development Plan; The National Housing Program and the Use of Solar Systems and not Conventional Energies in Human Settlements; National Infrastructure for the Development of Solar Energy; Plans to Incorporate Solar Energy Systems into Mexican Communities; General Panorama of Solar Energy Projects Being Carried out in Mexico; and Recent Demonstration Projects in Mexico.

  14. Determinacion de periodos fundamentales del suelo mediante vibraciones ambientales en el municipio de Humacao, Puerto Rico

    NASA Astrophysics Data System (ADS)

    Cintron Aponte, Rommel

    La tecnica de Nakamura ha sido utilizada a nivel mundial para determinar periodos fundamentales del suelo. La tecnica consiste en calcular y graficar cocientes espectrales H/V de vibraciones ambientales registradas sobre el suelo. Mediciones de vibraciones ambientales fueron tomadas en 151 lugares dentro del municipio de Humacao, localizado al este de Puerto Rico. Los datos se procesaron utilizando espectros de Fourier y espectros de potencia. La tecnica fue validada al compararla con los resultados de cocientes espectrales H/V de registros de sismos debiles y tambien con una modelacion numerica realizada con datos de un ensayo "downhole". Las graficas de los cocientes espectrales H/V fueron divididas en casos y grupos, los cuales dependen de la facilidad para identificar el periodo fundamental pico y amplitudes en frecuencias menores de 1 Hz, respectivamente. Los resultados obtenidos con ambos espectros fueron comparados y se concluye que los mismos se complementan para proveer resultados mas confiables. Se crearon mapas de periodos fundamentales, factores de amplitud, isoperiodos y clasificacion sismica de sitio. Los mapas de isoperiodos fueron realizados en las zonas mas pobladas sobre depositos de suelo. El mapa de periodos fundamentales del suelo mostro buena correlacion con la geologia local. El mapa de clasificacion sismica derivado de periodos de sitio fue comparado con el mapa de clasificacion sismica derivado de barrenos geotecnicos. El mapa de clasificacion obtenido de periodos puede sobreestimar un poco algunas clasificaciones del suelo. Sin embargo, este mapa puede proveer un estimado aproximado de la velocidad de onda de corte promedio del suelo hasta una profundidad de 100 pies (30 metros).

  15. Dietary potential renal Acid load in venezuelan children.

    PubMed

    López-Sayers, Mayerling; Bernal, Jennifer; López, Michelle

    2015-05-01

    Objetivo: Determinar y analizar la carga acida potencial renal de la dieta (Potential Renal Acid Load PRAL) y el patron de alimentacion de ninos entre 1 a 6 anos aparentemente sanos. Métodos: Se seleccionaron segun conveniencia a padres de 52 ninos asistentes a una consulta de ninos sanos. La calidad de la dieta y el patron de alimentacion se evaluo mediante un recordatorio de 24 horas y un cuestionario de frecuencia de alimentos. Se calculo la ingesta de macronutrientes y grupos de alimentos, como carnes, lacteos, frutas y verduras. La ingesta de nutrientes se comparo con las recomendaciones de energia y nutrientes. El PRAL se determino segun el metodo de Remer y Manz, para determinar la carga acida de la dieta. Se aplico estadistica descriptiva y correlaciones entre el PRAL, nutrientes y grupos de alimentos. Resultados: La ingesta de proteinas, de leche y de carnes fue elevada, mientras que la ingesta de rutas y hortalizas fue baja. El PRAL fue positivo en 92% de los ninos, se asocio con mayor ingesta de energia, proteinas, grasas, carne y lacteos. La ingesta de proteinas fue > 2,5 g/kg/ dia en 46,2% de los ninos. Los grupos de alimentos con mayor desequilibrio debido a exceso fueron la carne y los productos lacteos, mientras que por deficit fue el grupo de frutas y hortalizas. Conclusión: La dieta se caracteriza por una elevada carga de acido o PRAL, lo que aumenta el riesgo de acidosis sistemica y sus consecuencias metabolicas.

  16. PubMed

    Castro Castro, J; Lista Martínez, O; Varela Rois, P; Pastor Zapata, A

    2016-12-30

    La hidrocefalia aislada del ventrículo lateral puede ser provocada por la oclusión unilateral del foramen de Monro. Las causas más frecuentes son los tumores de los ventrículos laterales o en el área del tercer ventrículo. La estenosis no tumoral es poco frecuente y puede deberse a patologías inflamatorias, vasculares o congénitas.Se presenta el caso de un recién nacido a término diagnosticado prenatalmente de hidrocefalia unilateral. Tras el parto se confirmó en las sucesivas ecografías la dilatación ventricular unilateral motivo por el cual se indicó el tratamiento quirúrgico. El paciente fue sometido a la fenestración del foramen de Monro y septostomía por vía endoscópica, con buena evolución clínica y reducción del tamaño ventricular. Los hallazgos intraoperatorios demostraron la obstrucción por una membrana del foramen de Monro derecho. Se puede conseguir un tratamiento adecuado mediante neuroendoscopia, evitando implantar derivaciones ventriculares.

  17. [Syringomyelias in paediatrics: a retrospective study of 25 cases].

    PubMed

    Martinez-Albaladejo, I; Prochazkova, M; Perez-Sebastian, I; Bernardino-Cuesta, B; Martinez-Ferrandez, C; Suarez-Traba, O M; Budke, M; Garcia-Penas, J J

    2016-09-01

    Introduccion. Se define siringomielia como una cavidad que contiene liquido cefalorraquideo dispuesta en el interior de la medula espinal. Objetivo. Describir las caracteristicas clinicas de una serie de pacientes con siringomielia, su diagnostico y tratamiento. Pacientes y metodos. Estudio descriptivo retrospectivo realizado mediante la revision de historias clinicas en nuestro centro. Resultados. Se revisaron 25 pacientes diagnosticados de siringomielia. En cinco el diagnostico fue casual y ocho presentaban una patologia grave previa (tumoral, osea o vascular). Dos pacientes comenzaron con hidrocefalia y clinica de hipertension intracraneal y unicamente dos destacaban cefalea como unico sintoma. Cuatro presentaron escoliosis progresiva, dos de ellos como queja inicial, y precisaron cirugia con artrodesis y uso de corse, respectivamente. Destaca la precocidad del diagnostico. La mayoria presentaba unicamente perdida de fuerza leve, con potenciales somatosensoriales y electromiograma normales. En todos se hicieron controles con resonancia magnetica. Ocho pacientes precisaron craniectomia descompresiva con laminectomia posterior C1-C2, con drenaje de la cavidad siringomielica en cuatro. Nueve requirieron valvula de derivacion y dos precisaron, ademas, ventriculostomia. Conclusiones. La presencia de siringomielia en pediatria es rara, y se asocia generalmente a malformaciones en la fosa posterior y antecedentes de disrafismo espinal. Destaca la escoliosis progresiva como posible manifestacion aislada. Un abordaje multidisciplinar con controles radiologicos seriados y la valoracion por servicios de neurologia y neurocirugia pediatricos son mandatorios para su seguimiento.

  18. Neurobiología del autismo y TDAH mediante técnicas de neuroimagen: divergencias y convergencias

    PubMed Central

    Proal, Erika; Olvera, Jorge González; Blancas, Aurea S.; Chalita, Pablo J.; Castellanos, F. Xavier

    2013-01-01

    En el área clínica algunos síntomas del trastorno por déficit de atención e hiperactividad (TDAH), se presentan en los pacientes con trastorno del espectro autista (TEA). Se ha demostrado que existen alteraciones en circuitos cerebrales que impactan en fallas cognitivas y de comportamiento específicas de cada uno de estos trastornos. Sin embargo, han sido poco estudiados los correlatos cerebrales que hay detrás tanto de las similitudes como de las diferencias sintomatológicas. En la presente revisión se analizaron los estudios meta-analíticos existentes estructurales y funcionales en TDAH y TEA. Por un lado, se observaron convergencias en circuitos como el dorsal atencional, de funciones ejecutivas, visual, somatomotor y circuito de activación por defecto. Estas similitudes posiblemente explican las manifestaciones comórbidas entre los trastornos como la falla en la integración de información, motricidad fina y procesos atencionales específicos. Por otro lado, específicamente en el TDAH se observan déficits en el circuito de recompensa y ventral atencional, sistemas involucrados en la medición de efectos de reforzamiento y monitoreo atencional. En TEA los circuitos más afectados fueron los implicados en procesos de cognición social y lenguaje. En conclusión, existen correlatos neuronales en TEA que explican las manifestaciones clínicas tanto convergentes como divergentes presentes en TDAH. PMID:23897144

  19. Una prueba empírica de generadores de nümeros pseudoaleatorios mediante un proceso de decaimiento exponencial

    NASA Astrophysics Data System (ADS)

    Coronel-Brizio, H. F.; Hernández-Montoya, A. R.; Jiménez-Montaño, M. A.; Mora-Forsbach, L. E.

    2007-10-01

    Empirical tests for pseudorandom number generators based on the use of processes or physical models have been successfuly used and are considered as complementary to theoretical test of randomness. In this work a statistical methodology for evaluating the quality of pseudorandom number generators is presented. The method is illustrated in the context of the so-called exponential decay process, using some pseudorandom number generators commonly used in physics.

  20. IDEA: Ensenanza de romances espanoles mediante la musica y el arte (IDEA: Teaching Spanish "Romances" Through Music and Art).

    ERIC Educational Resources Information Center

    Garcia Glick, Beatriz

    1999-01-01

    Terrell's natural approach suggests that such interactive activities as music and art induce and improve student communication in language learning. Explanation of the method's steps uses the poem "Abenamar" as an example. The teacher first presents the work in historical context, then reads the work accompanied by visual aids, then…

  1. Estudio de factibilidad para la detección de planetas extrasolares mediante tránsitos

    NASA Astrophysics Data System (ADS)

    Petrucci, R.; González, J. F.; Jofré, E.

    We present an analysis to evaluate the possibility of detec-ting planetary transits with the HSH telescope located in CASLEO. To determine the pho- tometric precision of this instrument, we repeatedly observed two stellar fields belonging to IC 4651 and NGC 6281 clusters. We made aperture and PSF photometry for both fields and concluded that the second technique is the more precise. We calculated the S/N of each object and determined that atmospheric extinction variations and other instrumental problems are the main factors that limit the precision for stars brighter than V=13. Finally, the results indicate that it is possible to use this instrument to detect "Hot Jupiters" and low amplitude variables (V = 0.01). FULL TEXT IN SPANISH

  2. Estrellas Be: diagnóstico del medio circunestelar mediante líneas de H del IR cercano

    NASA Astrophysics Data System (ADS)

    Granada, A.; Arias, M. L.; Cidale, L. S.; Mennickent, R. E.

    We describe the behavior of the IR emission lines that appear in the K and L band spectra of Be stars and discuss the physical properties of the circum- stellar envelopes based on the classification scheme proposed by Mennick- ent et al. (2009). We found that for stars of Group I, Pfund and Humphreys lines form in an optical thick region, while for Group II stars, Humphreys lines form in optically thinner regions. The transition between Groups I and II could be interpreted in terms of the evolution of the circumstellar disc. FULL TEXT IN SPANISH

  3. Formación de estrellas deficientes en hidrógeno mediante flashes tardíos del helio

    NASA Astrophysics Data System (ADS)

    Miller Bertolami, M. M.

    This manuscript briefly describes the PhD thesis of the author. The aim of this thesis is the study of the formation and evolution of hydrogen deficient stars as a consequence of late helium flashes. These flashes lead either to the dilution or burning of the remaining hydrogen in the star, thus leading to stars with photospheric hydrogen deficiencies. FULL TEXT IN SPANISH

  4. IDEA: Ensenanza de romances espanoles mediante la musica y el arte (IDEA: Teaching Spanish "Romances" Through Music and Art).

    ERIC Educational Resources Information Center

    Garcia Glick, Beatriz

    1999-01-01

    Terrell's natural approach suggests that such interactive activities as music and art induce and improve student communication in language learning. Explanation of the method's steps uses the poem "Abenamar" as an example. The teacher first presents the work in historical context, then reads the work accompanied by visual aids, then…

  5. Cálculo del esfuerzo ideal de metales nobles mediante primeros principios en la dirección <100>

    NASA Astrophysics Data System (ADS)

    Bautista-Hernández, A.; López-Fuentes, M.; Pacheco-Espejel, V.; Rivas-Silva, J. F.

    2005-04-01

    We present calculations of the ideal strength on the < 100 > direction for noble metals (Cu, Ag and Au), by means of first principles calculations. First, we obtain the structural parameters (cell parameters, bulk modulus) for each studied metal. We deform on the < 100 > direction calculating the total energy and the stress tensor through the Hellman-Feynman theorem, by the relaxation of the unit cell in the perpendicular directions to the deformation one. The calculated cell constants differ 1.3 % from experimental data. The maximum ideal strength are 29.6, 17 and 19 GPa for Cu, Ag and Au respectively. Meanwhile, the calculated elastic modulus are 106 (Cu), 71 (Ag), and 45 GPa (Au) and are in agreement with the experimental values for polycrystalline samples. The values of maximum strength are explained by the optimum volume values due to the atomic radius size for each element.

  6. An economic prefeasibility study of geothermal energy development at Platanares, Honduras. Estudio economico de prefactibilidad del desarrollo de energia geotermica en Platanares, Honduras

    SciTech Connect

    Trocki, L.K.

    1989-09-01

    The expected economic benefits from development of a geothermal power plant at Platanares in the Department of Copan, Honduras are evaluated in this report. The economic benefits of geothermal plants ranging in size from a 10-MW plant in the shallow reservoir to a 20-, 30-, 55-, or 110-MW plant in the assumed deeper reservoir were measured by computing optimal expansion plans for each size of geothermal plant. Savings are computed as the difference in present value cost between a plan that contains no geothermal plant and one that does. Present value savings in millions of 1987 dollars range from $25 million for the 10-MW plant to $110 million for the 110-MW plant -- savings of 6% to 25% over the time period 1988 through 2008. 8 refs., 9 figs., 6 tabs.

  7. Space transportation propulsion USSR launcher technology, 1990

    NASA Technical Reports Server (NTRS)

    1991-01-01

    Space transportation propulsion U.S.S.R. launcher technology is discussed. The following subject areas are covered: Energia background (launch vehicle summary, Soviet launcher family) and Energia propulsion characteristics (booster propulsion, core propulsion, and growth capability).

  8. 77 FR 51991 - Combined Notice of Filings #1

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-28

    ... following electric corporate filings: Docket Numbers: EC12-135-000. Applicants: Energia Sierra Juarez U.S., LLC. Description: Section 203 Application of Energia Sierra Juarez U.S., LLC. Filed Date: 8/20/12...

  9. 76 FR 30934 - Combined Notice of Filings #1

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-27

    ...: Montgomery L'Energia Power Partners LP, Tanner Street Generation, LLC. Description: Joint Application for Authorization Under Section203 of the FPA of Montgomery L'Energia Power Partners LP, et. al. Filed Date: 05/23...

  10. Multi-National Cooperation in Space Operations

    DTIC Science & Technology

    2005-06-01

    8 Figure 3 Sea Launch System (From: Energia ) .................................................................9 Figure 4 Primary...some lessons may still be drawn. Sea Launch is a joint effort between Boeing (U.S.), RSC Energia (Russia), SDO Yuzhnoye/PO Yuzhmash (Ukraine...operations, and home port management. RSC Energia provides the Block DM upper stage, launch vehicle integration, ground systems and launch operations. SDO

  11. Teorí­as de primer y segundo orden sobre el potencial de ciertas figuras de equilibrio de cuerpos celestes

    NASA Astrophysics Data System (ADS)

    Gumbau, Manuel Forner

    2010-11-01

    Uno de los problemas que aborda la Mecánica Celeste es la determinación de las figuras de equilibrio de los cuerpos celestes. Para investigar su solución mediante métodos directos, se precisa evaluar el potencial generado por su autogravitación, el generado por su fuerza centrí­fuga y el generado por la fuerza de atracción entre los cuerpos. Los métodos clásicos de Finlay y Kopal que afrontan estos problemas, para determinar el potencial autogravitatorio en las configuraciones de equilibrio, emplean desarrollos en serie de los potenciales interior y exterior del potencial autogravitatorio. Estos métodos incurren en el error de suponer la convergencia en capas donde resulta cuestionable dicha convergencia para estos desarrollos en serie. En este trabajo se han elaborado unos algoritmos que contemplan toda la casuí&stica y que permiten una manipulación efic iente del producto de polinomios de Legendre, del producto de funciones asociada s de Legendre y del producto de armónicos esféricos como combinacióon lineal de ellos mismos, respectivamente. Se han obtenido, para primer y segundo orden en las amplitudes, los desarrollos correctos para los potencial es interior y exterior del potencial autogravitatorio para configuraciones de equilibrio aisladas, y , en primer orden de amplitudes, los mismos potenciales para los sistemas binarios próximos. Se ha elaborado un método analítico, en primer orden respecto de las amplitudes, para la determinación del potencial de marea en sistemas binarios próximos en el cual se manifiesta la forma de la componente secundaria del sistema

  12. Manual for ERLE (Energy-Related Laboratory Equipment). Instructions and information for institutions of higher learning concerning used energy-related laboratory equipment grants; Manual para ERLE [Equipo de Laboratorio Relacionado con la Energia]. Instrucciones e informacion para instituciones de educacion superior sobre subvenciones de equipo de laboratorio usado relacionado con la energia

    SciTech Connect

    Not Available

    1994-10-01

    This is a listing of energy related equipment available through the Energy-Related Laboratory Equipment Grant Program which grants used equipment to institutions of higher education for energy-related research. Information included is an overview of the program, how to apply for a grant of equipment, eligibility requirements, types of equipment available, and the costs for the institution.

  13. Extracción de conocimiento en bases de datos astronómicas mediante redes de neuronas artificiales: aplicaciones en la misión Gaia

    NASA Astrophysics Data System (ADS)

    Fustes Villadóniga, Diego

    2014-02-01

    In the so-called IT era, the capabilities of data acquisition systems have increased to such an extent that it has become difficult to store all the information they produce, and analyse it. This explosion of data has recently appeared in the field of Astronomy, where an increasing number of objects are being observed on a regular basis. An example of this is the upcoming Gaia mission, which will pick up multiple properties of a billion stars, whose information will have a volume of approximately a petabyte. The analysis of a similar amount of information inevitably requires the development of new data analysis methods to extract all the knowledge it contains. This thesis is devoted to the development of data analysis methods to be integrated in the Gaia pipeline, such that knowledge can be extracted from the data collected by the mission. In order to analyze the data from the Gaia mission, the European Space Agency organized the Data Processing and Analysis Consortium (DPAC) which is composed of hundreds of scientists and engineers. DPAC is divided into eight Coordination Units (CUs). This thesis is dedicated to algorithm development in CU8, which is responsible for source classification and astrophysical parameters (AP) estimation. Methods based on Artificial Neural Networks (ANNs) are developed to perform the tasks related to two different work packages in CU8: the GSP-Spec package (GWP-823), and the OA package (GWP-836). The GSP-Spec package is responsible for estimating stellar APs by means of the Radial Velocity Spectrograph (RVS) spectrum. This work presents the development of one of the GSP-Spec modules, which is based on the application of feed-forward ANNs. A methodology is described, based on the optimization of genetic algorithms and aimed at obtaining an optimal set of configuration parameters for the ANN in each case, depending on the signal to noise ratio (SNR) in the RVS spectrum and on the type of star to parameterize. Furthermore, in order to improve the AP estimates, wavelet signal processing techniques, applied to the RVS spectrum, are studied. Despite the effectiveness shown by ANNs in estimating APs, in principle they lack the ability to provide an uncertainty value on these estimates, making it impossible to determine their reliability. Because of this, a new architecture for the ANN is presented in which the inputs and outputs are reversed, so that the ANN estimates the RVS spectrum from the APs. Such an architecture is called Generative ANN (GANN) and is applied to the AP estimation of a set of simulated RVS spectra for the Gaia mission, where it is more effective than the conventional ANN model, in the case of faint stars with low SNR. Finally, the GANN can be applied for obtaining the posterior probability of each of the APs according to the RVS spectrum, allowing for their more complete analysis. Given the nature of the Gaia mission, which is the first astronomical mission that will observe, in an unbiased way, the entire sky up to magnitude 20, a large number of outliers are expected. The OA package in CU8 handles the processing of this type of objects, which are defined as those that could not be reliably classified by the methods in the upstream classification packages. OA methods are based on the unsupervised learning of all outliers. Such learning has two parts: clustering and dimensionality reduction. The Self-Organizing Map (SOM) algorithm is selected as a basis for this learning. Its effectiveness is demonstrated when it is applied, with an optimal configuration, to the Gaia simulations. Furthermore, the algorithm is applied to real outliers from the SDSS catalog. Since a subsequent identification of the clusters obtained by the SOM is necessary, two different methods of identification are applied. The first method is based on the similarity between the SOM prototypes and the Gaia simulations, and the second method is based on the recovery of stored classifications in the SIMBAD catalog by cross-matching celestial coordinates. Thanks to the visualization of the SOM planes, and to both methods of identification, it is possible to distinguish between valid observations and observational artifacts. Furthermore, the method allows for the selection of objects of interest for follow-up observations, in order to determine their nature.

  14. Ajuste de espectros integrados de cúmulos estelares de la Nube Mayor de Magallanes mediante el código Starlight

    NASA Astrophysics Data System (ADS)

    Minniti, J. H.; Vega, L. R.; Ahumada, A. V.; Clariá, J. J.

    2015-08-01

    The fit of synthetic spectra has proved to be a powerful tool for determining astrophysical parameters of stellar clusters (SCs). Such methodology is particularly useful to treat integrated spectra of extragalactic SCs. In this work, we present the results obtained by applying this technique to a sample of SCs belonging to the Large Magellanic Cloud (LMC) observed from CASLEO, and using the starlight code. The fitting of the data was performed by means of evolutive--synthesis models of simple--stellar populations of different ages and metallicities, based on the MILESM stellar libraries. The integrated spectra of 34 SCs of the LMC were fitted in order to obtain the age and metallicity of each object. This study also presents a comparison between the properties derived from those fittings and the method of confrontation of our observations with spectral templates of well known ages.

  15. Captura de amonio procedente de estiercol mediante membranas permeables de gases (capture of ammonnia from turkey manure using gas-permeable membranes)

    USDA-ARS?s Scientific Manuscript database

    This paper, written in Spanish, describes the capture and recovery of gaseous ammonia from turkey manure using gas-permeable membranes technology with formation of stabilized ammonium salts. Bench experiments were carried out in Maryland using a pilot prototype system with turkey litter inside contr...

  16. Experiencias, Sentido y Significado de la Consejeria en Justicia Social a Nivel Universitario: Estudio de Caso Cualitativo Mediante Tres Narrativas De Consejeros Profesionales en Educacion Superior

    ERIC Educational Resources Information Center

    Santiago Tosado, Virginia

    2012-01-01

    The purpose of the study was to understand and profoundly describe the nature of social justice practice, as is comes up from the experience of three professional counselors whose working settings are the academic arena. Detailed descriptions are presented concerning the meanings and sense of counseling for social justice, as the interviews…

  17. Desarrollo de la Escala sobre el Estigma Relacionado con el VIH/SIDA para Profesionales de la Salud mediante el uso de métodos mixtos123

    PubMed Central

    Varas-Díaz, Nelson; Neilands, Torsten B.; Guilamo-Ramos, Vincent; Cintrón Bou, Francheska N.

    2009-01-01

    El estigma relacionado con el VIH/SIDA continúa siendo un obstáculo para la prevención primaria y secundaria del VIH. Las consecuencias para las personas que viven con la enfermedad han sido muy documentadas y continúan siendo una gran preocupación para las personas que proveen servicios de salud y para aquellas que investigan el tema. Estas consecuencias son preocupantes cuando el estigma emana de profesionales de la salud porque se puede limitar el acceso a los servicios. Uno de los principales obstáculos para la investigación del estigma relacionado con el VIH en Puerto Rico es la falta de instrumentos cuantitativos para evaluar las manifestaciones del estigma entre profesionales de la salud. El objetivo principal de este estudio fue desarrollar y probar las propiedades psicométricas de una escala sobre el estigma relacionado con el VIH/SIDA culturalmente apropiada para personas que proveen servicios de salud puertorriqueñas y desarrollar una versión corta de la escala que pudiera usarse en escenarios clínicos con tiempo limitado. El instrumento desarrollado estuvo basado en evidencia cualitativa recopilada entre profesionales y estudiantes de profesiones de la salud puertorriqueños/as (n=80) y administrado a una muestra de 421 profesionales de la salud en adiestramiento. La escala contenía 12 dimensiones del estigma relacionado con el VIH/SIDA. El análisis cuantitativo corroboró 11 de ellas, teniendo como resultado un instrumento con validez y confiabilidad satisfactoria. Estas dimensiones, a su vez, fueron subcomponentes de un factor de estigma general superior. PMID:20333258

  18. Experiencias, Sentido y Significado de la Consejeria en Justicia Social a Nivel Universitario: Estudio de Caso Cualitativo Mediante Tres Narrativas De Consejeros Profesionales en Educacion Superior

    ERIC Educational Resources Information Center

    Santiago Tosado, Virginia

    2012-01-01

    The purpose of the study was to understand and profoundly describe the nature of social justice practice, as is comes up from the experience of three professional counselors whose working settings are the academic arena. Detailed descriptions are presented concerning the meanings and sense of counseling for social justice, as the interviews…

  19. Saint Petersburg International Conference on Integrated Navigation Systems, (9th), Held at St. Petersburg, Russia, on 27-29 May 2002

    DTIC Science & Technology

    2002-05-01

    Rocket and Space Corporation Energia , 4a, Lenina St.. 141070. Korolev, Moscow Region, Russia Phone 7095 5138242; Fax: 7095 5138620; e-mail: post2@rsce.ru...satellite that is being designed at RSC Energia to be used as a space component of INFA INFA effectiveness analysis has been completed. 1. INFA...being designed in RSC Energia as a radio broadcast and communications satellite, and which can be used as a space component of INFA. Fig.7 shows

  20. Soviet Space Program Handbook.

    DTIC Science & Technology

    1988-04-01

    in advance and some events were even broadcast live. Immediately following the first success- ful launch of their new Energia space launch vehicle in...early 1988. Just as a handbook written a couple of years ago would need updating with Mir, Energia , and the SL-16, this handbook will one day need up...1986. Johnson, Nicholas L. The Soviet Year in Space 1983. Colorado Springs, CO: Teledyne Brown Engineering, 1984. Lawton, A. " Energia - Soviet Super

  1. A mineral reconnaissance sampling manual for Costa Rica: Central American energy and resoure project. Manual para muestreo en el reconocimiento mineral de Costa Rica: Proyecto Centroamericano de energia y recursos naturales

    SciTech Connect

    Bolivar, S.

    1987-06-01

    This manual describes field procedures for the collection of stream-sediment and rock samples as part of the Mineral Resource Assessment of Costa Rica. It provides guidelines to be followed by personnel collecting, treating, or otherwise handling samples taken as part of this program. The objectives of the manual are to ensure that all samples are collected uniformly and consistent techniques are employed throughout the program. If this is done, the data from this study can be used to identify areas with potential for mineralization. This manual can also be used as a guideline for future geochemical sampling programs in Costa Rica.

  2. Tdp studies and tests for C. A. Energia Electrica de Venezuela (enelven) at planta ramon laguna, units RL-17 and RL-10. Volume 1. Executive summary, RL-17 test report, and gas conversion proposals. Export trade information

    SciTech Connect

    Not Available

    1991-03-28

    The study, conducted by Babcock and Wilcox, was funded by the U.S. Trade and Development agency on behalf of Enelven. In order to maximize generated power output and minimize operating costs at Planta Ramon Laguna, tests were done to evaluate the condition of equipment at the plant. In order to identify any damage and determine the operating output of each unit, assessments were done of the furnaces, boilers, generators and boiler feed pumps being used in the plant. The report presents the results of these tests. This is the first of three volumes and it is divided into the following sections: (1) Executive Summary; (2) Hydrogen Damage Assessment; (3) RL-17 Gas Conversion Proposal; (4) RL-10 and RL-11 Gas Conversion Proposals.

  3. Tdp studies and tests for C. A. Energia Electrica de Venezuela (enelven) at planta ramon laguna, units RL-17 and RL-10. Volume 2. Unit RL-10 boiler condition assessment report. Export trade information

    SciTech Connect

    Not Available

    1991-03-28

    The study, conducted by Babcock and Wilcox, was funded by the U.S. Trade and Development agency on behalf of Enelven. In order to maximize generated power output and minimize operating costs at Planta Ramon Laguna, tests were done to evaluate the condition of equipment at the plant. In order to identify any damage and determine the operating output of each unit, assessments were done of the furnaces, boilers, generators and boiler feed pumps being used in the plant. The report presents the results of these tests. This is the second of three volumes and it includes the following section: (1) Condition Assessment of Unit RL-10 Boiler.

  4. [First report of complete genome sequence and phylogenetic analysis of Human Bocavirus 1 isolated in Argentina].

    PubMed

    Cardozo Tomas, Agustina; Ghietto, Lucia Maria; Insfran, Constanza; Wasinger, Nicolas; Marchesi, Ariana; Adamo, Maria Pilar

    2015-01-01

    Antecedentes. El Bocavirus humano (HBoV) es un parvovirus descripto por primera vez en 2005, asociado a cuadros leves y graves de infección respiratoria aguda (IRA), una de las principales causas de morbimortalidad en la población infantil en todo el mundo. Al presente se han identificado 4 genotipos, nombradas HBoV1 a 4, de los cuales el primero es el que se asocia a IRA con predominancia. Objetivo. Obtener el genoma completo de HBoV respiratorio aislado localmente. Métodos. Se diseñaron primers para fragmentos superpuestos del genoma completo de HBoV, empleando las herramientas informáticas ClustalW y NCBI Primer-Blast. Los fragmentos se amplificaron por PCR convencional y se secuenciaron mediante tecnología capilar BigDye Terminator. La edición de las secuencias y análisis filogenético se realizó con el programa MEGA v6. Resultados. Se obtuvo la secuencia genómica completa de HBoV1 cepa 307AR09, aislada de secreción respiratoria de paciente pediátrico con bronquiolitis. La misma fue depositada en la base de datos GenBank con número de acceso KJ634207. El análisis filogenético con secuencias genómicas completas de los 4 genotipos obtenidas en distintas regiones del mundo muestra similitud cercana al 100% con la secuencia original descubierta en Suecia (DQ000495), así como el agrupamiento de los 4 genotipos en 2 clusters de alta homología interna: HBoV1-HBoV3 y HBoV2-HBoV4. Conclusiones. Se aportan datos locales para futuros desarrollos tecnológicos destinados tanto a la investigación como al diseño de métodos diagnósticos para la práctica médica. Por otra parte, los resultados sustentan la propuesta de redistribución taxonómica de los 4 genotipos en 2 especies.

  5. Screening in a Lactobacillus delbrueckii subsp. bulgaricus collection to select a strain able to survive to the human intestinal tract.

    PubMed

    Vázquez, Clotilde; Botella-Carretero, José I; García-Albiach, Raimundo; Pozuelo, María J; Rodríguez-Baños, Mercedes; Baquero, Fernando; Baltadjieva, María A; del Campo, Rosa

    2013-01-01

    Objetivos: Se determinaron la diversidad genética y la resistencia de una colección de más de 100 cepas de Lactobacillus bulgaricus subespecie delbrueckii, aisladas de diferentes yogures caseros de las áreas rurales de Bulgaria. Métodos: La cepa K98 fue la más resistente a las sales biliares y al pH bajo. La supervivencia y los efectos sobre la producción de ácidos grasos de cadena corta se evaluó en 20 voluntarios sanos. Se observó una alta diversidad genética en la colección de L. bulgaricus mediante RAPD, mientras que la capacidad de tolerar concentraciones altas del ácido desoxicólico y de diferentes niveles de pH fue variable. Se seleccionó la cepa K98 y se usó para preparar un yogur casero que se administró a los 20 voluntarios (500 ml/día durante 15 días). Se recogieron muestras fecales basales y tras la ingesta del yogur. Resultados: Los experimentos DGGE, empleando cebadores universales y para bacterias ácido-lácticas (BAL) demostraron que no hubo cambios significativos en la composición cualitativa de la composición de la microflora intestinal. Se observó una banda correspondiente a L. bulgaricus en las 20 muestras. Sólo se recuperó una cepa viable de L. bulgaricus K98 en un único voluntario. Tras la ingesta de yogur, hallamos un aumento de BAL y de Clostridium perfringens y una disminución de Bacteroides- Prevotella-Porphyromonas. Además, se detectó un aumento en las heces de los ácidos acético, butírico y 2-hidroxibutírico. Conclusiones: La diversidad genética de L. delbrueckii subespecie bulgaricus es alta. Hemos aislado una cepa probiótica resistente a la bilis y a la acidez elevada, L. delbrueckii subesp. bulgaricus-K98. Se hallaron cambios cualitativos y cuantitativos en la microflora intestinal tras la ingesta de yogur casero que contenía esta cepa, con un aumento concomitante en las heces de AGCC. Nuestros hallazgos apoyan el interés por desarrollar estudios futuros con cantidades variables de L. delbrueckii

  6. [Association between food behavior and hypercholesterolemia-LDL in university students].

    PubMed

    Salazar Ruiz, Erika Nohemi; Márquez Sandoval, Yolanda Fabiola; Vizmanos Lamotte, Bárbara; Altamirano Martínez, Martha Betzaida; Salgado Bernabé, Aralia Berenice; Salgado Goytia, Lorenzo; Muñoz Valle, José Francisco; Parra Rojas, Isela

    2015-06-01

    Introducción: la hipercolesterolemia-LDL (H-LDL) se asocia a mayor riesgo de enfermedad cardiovascular. La asociacion entre H-LDL y alimentacion se ha centrado en aspectos nutrimentales. El estudio de la asociacion entre el comportamiento alimentario (CA) y la H-LDL en estudiantes universitarios podria brindar elementos de correccion y/o prevencion nutricional en esta poblacion. Objetivo: evaluar la asociacion entre CA e H-LDL en estudiantes universitarios. Métodos: estudio transversal realizado en una muestra de 167 estudiantes de la Universidad Autonoma de Guerrero, Mexico. Se midio el colesterol-LDL serico, considerandose hipercolesterolemia una concentracion ≥100 mg/dL. El CA se evaluo mediante un cuestionario previamente validado. La asociacion entre CA e H-LDL se determino con una regresion logistica bivariada, ajustando por sexo, edad, nivel socioeconomico, tabaquismo, ingesta de energia, actividad fisica, presencia o no de obesidad y antecedentes familiares. Resultados: consumir el almuerzo (colacion matutina) se asocio con un 63% de menos riesgo de H-LDL (OR 0,37; 95% IC 0,15, 0,90). Ingerir alimentos fuera de casa una o dos veces a la semana, se asocio con cuatro veces mas riesgo de H-LDL (R 5,14; 95% IC 1,12, 23,62). Los sujetos que referian consumir alimentos en exceso (1 o 2, y 3 o mas veces/semana) tuvieron mayor riesgo de H-LDL (OR 3,26; 95% IC 1,10, 9,64 y OR 10,52; 95% IC 2,66, 41,60, respectivamente). Conclusiones: algunos CA habituales de los estudiantes universitarios de Guerrero implican mayor riesgo de H-LDL. Por ello, promover acciones correctivas y/o preventivas centradas en estos CA podria mejorar la salud de esta poblacion.

  7. 77 FR 23474 - Combined Notice of Filings #1

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-19

    ....m. ET 5/1/12. Docket Numbers: ER12-1470-000. Applicants: Energia Sierra Juarez U.S., LLC. Description: Energia Sierra Juarez U.S. LLC FERC Electric Tariff No.1 MBR Tariff to be effective 4/10/2012...

  8. Systematic review and meta-analysis of persistent left superior vena cava on prenatal ultrasound: associated anomalies, diagnostic accuracy and postnatal outcome.

    PubMed

    Gustapane, S; Leombroni, M; Khalil, A; Giacci, F; Marrone, L; Bascietto, F; Rizzo, G; Acharya, G; Liberati, M; D'Antonio, F

    2016-12-01

    high-risk pregnancies, the rate of associated abnormalities is likely to be higher than that in the general population of fetuses with PLSVC, for which more data are needed. Revisión sistemática y metaanálisis de la persistencia de la vena cava superior izquierda en la ecografía prenatal: anomalías asociadas, precisión del diagnóstico y resultado postnatal RESUMEN OBJETIVOS: Cuantificar la prevalencia de anomalías cromosómicas en fetos con vena cava superior izquierda persistente (VCSIP), evaluar la solidez de la asociación entre la VCSIP y la coartación aórtica, y determinar la precisión del diagnóstico de la ecografía prenatal como método para identificar correctamente casos aislados de VCSIP. MÉTODOS: Se buscó en las bases de datos de MEDLINE, EMBASE, CINHAL y Cochrane artículos publicados desde el año 2000 en adelante, usando combinaciones de las palabras clave "vena cava superior izquierda" y "resultado". Dos de los autores revisaron de forma independiente todos los resúmenes encontrados. La evaluación de calidad de los estudios incluidos se realizó mediante la escala Newcastle-Ottawa para estudios de cohortes. Se analizaron las tasas de los siguientes resultados: anomalías cromosómicas; anomalías intracardíacas (AIC) y anomalías extracardíacas (AEC) asociadas diagnosticadas prenatalmente; AIC y AEC adicionales detectadas sólo en ecografías postnatales o mediante evaluación clínica, pero no observadas en ecografías prenatales; y la asociación entre la VCSIP y la coartación aórtica. Se utilizó un meta-análisis de proporciones para combinar los datos. En total, se identificaron 2708 artículos y se incluyeron 13 (n = 501) en la revisión sistemática. En la ecografía prenatal o en una revisión de seguimiento se detectaron AIC y AEC asociadas en el 60,7% (IC 95%, 44,2-75,9%) y el 37,8% (IC 95%, 31,0-44,8%) de los casos, respectivamente. Se produjeron anomalías cromosómicas en el 12,5% (IC 95%, 9,0-16,4%) de los casos en

  9. Former Soviet Republic Capabilities in Space and Science

    DTIC Science & Technology

    1993-02-01

    MIR space station and improving the developed Proton, Zenith, Energia booster and Buran shuttle systems. They mentioned with pride that the Russian...business in a few months. NPO Energia was interesting in that it is a massive bureau with about 30,000 people, which has controlled about two-thirds of...three or four people working. Overall, Energia didn’t seem to be able to describe itself as a business or indicate what it wanted from the U.S., other

  10. Radiative Augmented Combustion

    DTIC Science & Technology

    1988-03-01

    PbLFICE SY 7a NAME OF MONITORING ORGANIZATION M.L. ENERGIA , Inc. AFOSR/NA 6r. ADDRESS (City. State. anW ZIP Code) 7b. ADDRESS (City State, and ZIPCode...27 -00 N ’fPECTED 0 6I FOREWORD This is the Final Report on research on Radiative Augmented Combustion conducted at M. L. ENERGIA , Inc. It was a...the first two annual reports prior to this one. The entire research program was performed at ENERGIA , Inc., Princeton, New Jersey, with Dr. Moshe Lavid

  11. Radiative Augmented Combustion.

    DTIC Science & Technology

    1985-08-12

    86-0085 In 00I to RADIATIVE AUGMENTED COMBUSTION MOSHE LAVID M.L. ENERGIA , INC. P.O. BOX 1468 1 PRINCETON, NEW JERSEY 08542 AUGUST 1985 *.. plo...Combustion conducted at M.L. ENERGIA . It is funded by the Air Force Office of Scientific Research under Contract No. F49620-83-C-0133, with Dr. J.M...reported. It covers the second year of the contract, from July 15, 1984 through July 14, 1985. The work was performed at ENERGIA , Princeton, New Jersey

  12. The Impact of Conferencing Assessment on EFL Students' Grammar Learning (Impacto de la evaluación mediante conferencias en el aprendizaje de la gramática en estudiantes de inglés como lengua extranjera)

    ERIC Educational Resources Information Center

    Baleghizadeh, Sasan; Zarghami, Zahra

    2012-01-01

    This article reports on a study that was carried out in order to examine the impact of conferencing assessment on students' learning of English grammar. Forty-two Iranian intermediate university students were randomly assigned to an experimental and a control group. The participants in the experimental group took part in four individual and four…

  13. Self-Access Language Learning: Students' Perceptions of and Experiences within This New Mode of Learning (Aprendizaje de idiomas mediante la modalidad de autoacceso: percepciones y experiencias de los estudiantes)

    ERIC Educational Resources Information Center

    Herrera Díaz, Luz Edith

    2012-01-01

    With the aim of fostering autonomy in learning, both innovations, the self-access centre and the mode of learning derived from it, were adopted in the context of the study (Language Centre in the University of Veracruz, Mexico). Based on a case study, I have adopted a qualitative perspective to do this research, which aimed to know how the…

  14. "La Evaluacion de la Actuacion Oral de los Hispanoparlantes Bilingues Mediante las Directrices de ACTFL (Evaluation of the Oral Presentation of the Bilingual Spanish Speaking Professionals by Moderators of the ACTFL).

    ERIC Educational Resources Information Center

    Alonso, Esther

    1997-01-01

    Discusses the validity of a rating scale created by the American Council on the Teaching of Foreign Languages for the purpose of measuring the oral language proficiency of bilingual professionals who are speakers of English and Spanish. Notes that this scale measures various levels of competence and features of an individual's speech. (14…

  15. El rol de Ia colaboracion y el Modelo de Aprendizaje Basado en Proyectos (ABPr) mediante el lente de la Teoria de Actividad (CHAT): un estudio de caso con estudiantes de 9no grado

    NASA Astrophysics Data System (ADS)

    Delgado, Isabel C.

    Los modelos de eensenanza y aprendizaje constructivistas conceptualizan el aprendizaje como un proceso activo. El modelo de Aprendizaje Basado en Proyectos (ABPr) se distingue por una serie de componentes, entre los cuales se destaca el aspecto colaborativo y cooperativo como un reto al momento de su implantacion. Son pocas las investigaciones que se concentran en este aspecto del modelo. En este estudio, se analizaron las diversas interacciones que surgen durante la implantacion de una unidad curricular sobre el tema de Geologia de Puerto Rico, la cual se diseno con el modelo ABPr cuyo enfoque es orientacion a proyectos. Particularmente, se examinaron las interacciones sociales que surgen entre los pares y entre pares y docente durante el proceso de planificacion y desarrollo de los productos finales, al igual que las interacciones entre los estudiantes y el material didactico en estas etapas del modelo. La investigacion es de tipo cualitativo e incorpora como diseno el estudio de caso. Las diversas interacciones constituyen la unidad de analisis. En el estudio participaron 19 estudiantes de 9no grado, a quienes se organizaron en 5 grupos colaborativos por temas de interes (Pangea, Placas tectonicas, Volcanes, Tsunamis y Terremotos). Las tecnicas que se utilizaron para recopilar los datos fueron: observaciones participativas, grupos focales y analisis de documentos (cuadernos reflexivos y respuestas de los estudiantes a la pregunta central del proyecto). Para el analisis de los datos se aplico la teoria de actividad (CHAT) que concentra la unidad de analisis en la actividad humana en un contexto particular. Los resultados del estudio senalan que las interacciones entre pares, entre pares y docente, asi como entre estudiantes y material didactico son fundamentales en el proceso de aprendizaje. Una mayor interaccion entre pares durante las etapas de planificar y desarrollar los productos finales de la unidad, promueve una mejor comprension de los conceptos de la unidad, segun evidencia los productos finales del ABPr. La interaccion con el docente es muy importante para mediar los conflictos y desacuerdos que surgen como parte de las interacciones entre pares. Por lo tanto, el uso de diversas estrategias de andamiaje por parte del docente durante las reuniones de los grupos colaborativos es esencial para el exito del modelo ABPr.

  16. Encouraging Teenagers to Improve Speaking Skills through Games in a Colombian Public School (Motivación de adolescentes para mejorar su expresión oral mediante el juego en un colegio público colombiano)

    ERIC Educational Resources Information Center

    León, William Urrutia; Cely, Esperanza Vega

    2010-01-01

    Our project was implemented with tenth grade students of a public school located in the Usme Zone in Bogotá. We decided to develop this action research project because we were concerned about our students' difficulties when attempting to speak English. They felt inhibited with activities that involved oral interaction mainly because they were…

  17. Fostering Intercultural Communicative Competence through Reading Authentic Literary Texts in an Advanced Colombian EFL Classroom: A Constructivist Perspective (Desarrollo de la competencia comunicativa intercultural mediante la lectura de textos literarios auténticos: una perspectiva constructivista)

    ERIC Educational Resources Information Center

    Gómez, Luis Fernando R.

    2012-01-01

    This article describes an action research experience carried out in an advanced English as a foreign language classroom of the language program at a university in Bogotá, Colombia, in 2010. The study proposes the inclusion of authentic literary texts in the English as a foreign language classroom through the implementation of four constructivist…

  18. Quantification of fecal neutrophils by MPO determination (myeloperoxidase) in patients with invasive diarrhea. Cuantificación de neutrofilos fecales mediante la determinación de MPO (Mieloperoxidasa) en pacientes con diarrea invasiva.

    PubMed

    Bustos, D; Greco, G; Yapur, V; Facente, A; Di Carlo, M; Bustos, F; Dapia, L; Ascione, A; Negri, G

    2000-01-01

    Myeloperoxidase (MPO), a specific polymorphonuclear leukocyte enzyme, has been used previously to quantify the number of neutrophils in tissue. MPO activity was found to be linearly related to the number of neutrophil cells. In an attempt to use this method in leukocytes measuring in stool, fecal MPO was solubilized with hexadecyltrimethylammonium bromide and the MPO activity was measured by a dianisidine-H2O2 assay. Stools from 10 normal subjects and 39 patients with diarrhea produced by enteropathogenic bacteria were examined for leukocytes by MPO activity as well as microscopically using methylene blue stain, MPO activity was positive in 36 patients (92%) and leukocytes were present by microscopic observation in 30 (77%). Fecal leukocytes were not found in healthy controls and the MPO activity was undectable. Stool MPO activity had a range of from 1.6 to 2,830.0 x 10(3) UMPO per gram of feces (median 460.0). The number of neutrophils obtained through MPO activity had a range of 6.0 to 13,216.0/ mm3 (median 1,261.0). Fecal MPO activity is a simple biochemical assay for the detection and quantification of fecal leukocytes.

  19. "La Evaluacion de la Actuacion Oral de los Hispanoparlantes Bilingues Mediante las Directrices de ACTFL (Evaluation of the Oral Presentation of the Bilingual Spanish Speaking Professionals by Moderators of the ACTFL).

    ERIC Educational Resources Information Center

    Alonso, Esther

    1997-01-01

    Discusses the validity of a rating scale created by the American Council on the Teaching of Foreign Languages for the purpose of measuring the oral language proficiency of bilingual professionals who are speakers of English and Spanish. Notes that this scale measures various levels of competence and features of an individual's speech. (14…

  20. 78 FR 67138 - Combined Notice of Filings #1

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-08

    ... Solar 1, LLC, Copper Mountain Solar 2, LLC, Energia Sierra Juarez U.S., LLC, Flat Ridge 2 Wind Energy LLC, Fowler Ridge II Wind Farm LLC, Mehoopany Wind Energy LLC, Mesquite Power, LLC, Mesquite Solar...

  1. Dollar Summary of Prime Contract Awards by State, Place, and Contractor, FY84, Part 4, (Allenville, Missouri-Wyoming, Pennsylvania).

    DTIC Science & Technology

    1984-01-01

    CLOSED CIRCUIT TV CORP 26 26INGERSOLL-RAND COMPANY INC 67 67INSTITUTE FOR ADVANCED STUDY 75 75 INTERNATIONAL BUSINESS MCHS 28 28M L ENERGIA INC 30...I 28 PRINCETON E 0 & 0 PARC 28 IBM CORP 25 25 M L ENERGIA INC 107 107 SAN LUIS CAMERA 41 41...SANDERS ASSOCIATES INC 848 848 SATELLITE SERVICES INC 237 237 SCHICKEL H GEN CONTR INC 132 132 SHERLOT HOME RENOVATION CORP 317 317 TRACY TROMBLEY CONT

  2. Existing Resources, Standards, and Procedures for Precise Monitoring and Analysis of Structural Deformations. Volume 1

    DTIC Science & Technology

    1992-09-01

    commonplace, particularly in the monitoring of dams and hydro-electric power generating stations. Italy’s ENEL (Ente Nazionale per 1’ Energia Elettrica...State Commissions to enforce supervision and monitoring of dams by the new owners. Currently, dams owned by state organizations such as Agua y Energia ...Large Dams, Rio de Janeiro, Brazil May. Millmore, J.P. and J.A. Charles (1988). "A -survey of UK embankment dams." Proceedings of Reservoir Renovation 88

  3. JPRS Report, Near East & South Asia

    DTIC Science & Technology

    1989-01-04

    to increase the use of the new powerful launcher, " Energia ". He said Soviet launchers, predecessors to " Energia ", were available for service, but... renovated in 1971 and resumed activities with a capacity of 15,000 barrels a day. "Once the Iraqi-imposed war was launched, the flow of crude oil...manufacturing. He said that the refinery was once renovated in 1980, following the disruption of crude oil from the Naft Shahr region. He further

  4. Defense Energy Support Center Fact Book FY 2007

    DTIC Science & Technology

    2008-03-21

    3 M 21 years Fort Monmouth, NJ Lighting Upgrade, HVAC Renovation , UESC Implementation, GHP, Cogeneration System Site Preparation/Feasibility Ameresco...behalf of Navy Installations in the Sicily, Sardinia and Campania regions of Italy . Awards were made to two companies, ENEL Energia and Energia y...funded $333 million for SRM projects to maintain and renovate military Services owned fuels facilities worldwide . This amount was nearly double the

  5. Europe and Asia in Space, 1993-1994.

    DTIC Science & Technology

    1993-01-01

    For Privatization", Aviation Week and Space Technology, 27 June 1994, pp. 22-23. 96. "RKK Energia Issues Stock Due to Privatization Order", Space News...multi-year renovation project was undertaken in Kourou to support not only the forthcoming Ariane 5 but also the con- tinuing Ariane 4 missions. By...via the newly formed Lockheed- Khrunichev- Energia joint venture. By the end of 1994 no commercial Proton launches had been undertaken, and the first

  6. Experimentation Using the Mir Station as a Space Laboratory

    DTIC Science & Technology

    1998-01-01

    Institute for Machine Building (TsNIIMASH) Korolev, Moscow Region, Russia V. Teslenko and N. Shvets Energia Space Corporation Korolev, Moscow...N. Shvets Energia Space Corporation Korolev, Moscow Region, Russia J. A. Drakes/ D. G. Swann, and W. K. McGregor* Sverdrup Technology, Inc...and plume computations. Excitation of the plume gas molecular electronic states by solar radiation, geo- corona Lyman-alpha, and electronic impact

  7. Guidance for DoD Utilization of Host Nation Power

    DTIC Science & Technology

    2015-10-28

    data)  The Honduran electric company,  Empresa  Nacional de Energia Electrica (ENEE) generates power and  operates the national transmission and...CDF  Cumulative Distribution Function  DoD  Department of Defense  ENEE  Empresa  Nacional de Energia Electrica  EUPW  Escalating Uniform Present Worth

  8. METABOLIC EFFECTS OF Β-GLUCANS (SACCHAROMYCES CEREVISAE) PER OS ADMINISTRATION IN RATS WITH STREPTOZOTOCIN-INDUCED DIABETES.

    PubMed

    Vieira Lobato, Raquel; De Oliveira Silva, Viviam; Francelino Andrade, Eric; Ribeiro Orlando, Débora; Gilberto Zangeronimo, Márcio; Vicente de Sousa, Raimundo; José Pereira, Luciano

    2015-07-01

    Introdución: los beta-glucanos (BG) derivados de tejidos vegetales se ha informado que muestran efectos metabólicos. Por el contrario, esas fibras aisladas de levadura parecen estar más relacionadas con la modulación de la respuesta inmune. Dado que los individuos con diabetes son más susceptibles a la exacerbación de los signos inflamatorios, la ingestión de fibras sí podría conjugar ambos efectos metabólicos e inmunológicos, lo cual sería de gran importancia. Objetivo: el objetivo de este estudio fue investigar los efectos de la ingestión de los BG —Saccharomyses cerevisiae— en el perfil glucémico y la lipoproteína de ratas diabéticas. Metodos: en el diseño de delineación, totalmente precario, fueron utilizadas 24 ratas Wistar macho adultas distribuidas en cuatro grupos, con un modelo factorial 2 x 2 (con y sin diabetes, con y sin BG). La diabetes mellitus fue inducida por la inyección intraperitoneal de un 80 mg/kg de estrepzotocina. Por lo tanto, los animales con glucemia en ayunas de más de 250 mg/dl fueron considerados diabéticos. Cuarenta y ocho horas después de la inducción, las ratas recibieron dosis diarias de 30 mg/kg de BG o solución salina mediante alimentación forzada durante 28 días. Resultados y discusión: los grupos con DM presentó el mayor índice glucémico y menores niveles de péptido C que los grupos de control, además de reducir el aumento de peso y un mayor consumo de la ración, la ingestión de agua y el volumen urinario. Los niveles de colesterol total (CT), LDL-C + VLDL-C, triacilglicéridos plasmáticos (TAG) y alanina aminotransferasa (ALT) también fueron más altos en los animales diabéticos (p < 0,05), y había alteraciones en los niveles de HDL-C. La ingestión de BG redujo las concentraciones de glucosa en sangre (30%), TAG (32%) y ALT (41%) (p < 0.05). No se observaron alteraciones hepáticas en ninguno de los grupos. Además, los animales diabéticos presentaron un aumento de la relación cripta

  9. Moléculas orgánicas no-rígidas

    NASA Astrophysics Data System (ADS)

    Senent Díez, M. L.

    Se destaca la importancia del estudio espectroscópico ab initio de una serie de moléculas no-rígidas detectadas en el medio interestelar (acetona, dimetil-eter, etanol, metanol, metilamina, ldots), así como los últimos avances del desarrollo de la metodología para el tratamiento teórico de estas especies. Se describe, a modo de ejemplo, el análisis del espectro roto-torsional de la molécula de glicoaldehido que ha sido recientemente detectada en el centro Galáctico Sagitario B2 (N) [1]. Esta especie presenta dos movimientos de gran amplitud que interaccionan, descansan en el Infrarrojo Lejano y le confiere propiedades no-rígidas. La molécula puede existir en posiciones cis y trans y presenta cinco confórmeros estables, tres de simetría Cs (I, II y IV) y un doble mínimo trans de simetría C1 (III) . La conformación favorita, I, presenta simetría Cs y se estabiliza por la formación de un puente de hidrógeno entre los grupos OH y C=O. Los mínimos secundarios II, III, y IV se han determinado a 1278.2 cm-1 (trans, Cs), 1298.8 cm-1 (trans, C1) y 1865.2 cm-1 (cis, Cs) con cálculos MP4/cc-pVQZ que incluyen sustituciones triples. Para determinar que vibraciones interaccionan con las torsiones, se ha realizado un análisis armónico en los mínimos. Las frecuencias fundamentales armónicas correspondientes al mínimo I se han calculado en 213.4 cm-1 (torsión C-C) y 425.7 cm-1 (torsión OH). Es de esperar que tan sólo dos vibraciones, la flexión del grupo C-C-O y el aleteo del hidrógeno del grupo aldehídico puedan desplazar el espectro torsional de la molécula aislada. Para determinar el espectro torsional, se ha determinado la superficie de potencial en dos dimensiones mediante el cálculo ab initio de las geometrías y energías de 74 conformaciones seleccionadas. Estas últimas se han ajustado a un doble serie de Fourier. A partir de la PES y de los parámetros cinéticos del Hamiltoniano vibracional se han obtenido frecuencias e intensidades

  10. Tdp studies and tests for C. A. Energia Electrica de Venezuela (enelven) at planta ramon laguna, units RL-17 and RL-10. Volume 3. Unit RL-10 turbine generator condition assessment report and units RL-10 and RL-11 boiler feed pump conditon assessment report. Export trade information

    SciTech Connect

    Not Available

    1991-03-28

    The study, conducted by Babcock and Wilcox, was funded by the U.S. Trade and Development agency on behalf of Enelven. In order to maximize generated power output and minimize operating costs at Planta Ramon Laguna, tests were done to evaluate the condition of equipment at the plant. In order to identify any damage and determine the operating output of each unit, assessments were done of the furnaces, boilers, generators and boiler feed pumps being used in the plant. The report presents the results of these tests. This is the last of three volumes and it is divided into the following sections: (1) Condition Assessment of Unit RL-10 Turbine-Generator; (2) Condition Assessment of Unit RL-10 and RL-11 Boiler Feed Pumps.

  11. Studio delle popolazioni di blazar ad alte energie

    NASA Astrophysics Data System (ADS)

    Gasparrini, D.; Giommi, P.

    2008-10-01

    Utilizzando la grande quantita' di dati sui blazar disponibile ad oggi, e' possibile costruire una distribuzione spettrale di energia (SED) media per ciascuna classe di oggetti. Basandosi su un modello SSC, e' inoltre possibile stimare il comportamento di questi oggetti nella banda di energia dei raggi gamma partendo dalle informazioni ottenute da osservazioni in altre bande di energia quali il radio e l'X. Utilizzando le simulazioni sara` possibile prevedere un eventuale cambio di popolazione dominante ad alte energie(oltre 1GeV) rispetto a quanto avviene in banda radio dove domina la popolazione dei FSRQ rispetto ai BL Lac e cercare un'eventuale conferma dagli esperimenti AGILE e GLAST.

  12. Spain-Chile and Spain-Ecuador cooperation in the field of research nuclear reactors

    SciTech Connect

    Avendano, G.; Rodriguez, M.L.; Manas, L.; Masalleras, E.; Montes, J.

    1981-01-01

    The Spanish Board of Nuclear Energy (JEN) has been cooperating for the last several years with the Comision Chilena de Energia Nuclear (Chilean Commission of Nuclear Energy (CCHEN)), on the one hand, and with the Comision Ecuatoriana de Energia Atomica (Ecuadorian Commission of Atomic Energy (CEEA)), on the other. The result of this cooperation has been the implementation of projects in both countries to create research centers around a nuclear reactor as the main working tool: the Lo Aguirre reactor in Chile and the Ruminahui reactor in Ecuador.

  13. Atmospheric Effects of Chemical Rocket Propulsion

    DTIC Science & Technology

    1991-10-01

    Tsyklon Baikonur 14.0 Cosmos Baikonur 10.0 Proton Baikonur 11 .0 Molniya Baikonur 9.0 50 Zenit Baikonur 2.0 * 0 4Vostok Baikonur 1.0 Energia 1 0 * 4...Total) 45,515 H2 (Total) 23,376 H20 (Tota. 202,854 N2 (Total) 112,740 HCI (Total) 119.984 OH (Total) 286 H (Total) 286 A12 03 286,100 Energia CO 1,242,940...Earth’s surface, through roughness and solar heating, and (2) the large-scale structure of the troposphere; e.g., inversions. Typically the boundary

  14. Abstracts: 1984 AFOSR/ONR Contractors Meeting on Airbreathing Combustion Research Held on June 20-21, 1984, in Pittsburgh, Pennsylvania

    DTIC Science & Technology

    1984-06-21

    H.L. Beach, NASA Langle Research Center Topic: IGNITION/COMBUSTION ENHANCEMENT 10:30 - 11:00 M. Lavid. ML Energia , Inc. 11:00 - 11:30 W. Braun and...F49620-83-C-0133) Principal Investigator: Moshe Lavid ML ENERGIA , Inc. P.O. Box 1468 Princeton, NJ 08542 SUMMARY/OVERVIEW: The radiative concept to...an indine resonance lamp and a solar -blind PhotomultiPlier. 2 nder- the%,& Cir esm.tanr&e the temPerAtre mod1Jlation CArn he r.qlrujated rom a

  15. Brazil’s Technology Sector

    DTIC Science & Technology

    2006-10-01

    Livre ” (Rio de Janeiro: 2003). <http://www.finep.gov.br//fundos_setoriais/ct_info/resultados/resultado_chamada_publicaMCT_Finep_ct_info_01_ 2003.pdf...Minas e Energia , “Biodiesel: The New Fuel from Brazil” (Brasília: n.d.). <http://www.biodiesel.gov.br/docs/cartilha_ingles.pdf> (accessed on October 5...Tecnologia, “ Energia e Recursos Minerais: Introdução” (Brasília: 2006). <http://www.mct.gov.br/index.php/content/view/5066.html> (accessed on October

  16. Exploring Reflective Teaching through Informed Journal Keeping and Blog Group Discussion in the Teaching Practicum (Exploración de la enseñanza reflexiva en la práctica docente a través de la escritura informada de diarios y de discusiones grupales mediante "blogs")

    ERIC Educational Resources Information Center

    Insuasty, Edgar Alirio; Zambrano Castillo, Lilian Cecilia

    2010-01-01

    This article reports the findings of a study which examined how student teachers could be empowered as more reflective practitioners through journal keeping and blog group discussions. It was carried out with six student teachers who developed their practicum over six months. Data were collected through journals, blogs, metaphors, conferences and…

  17. New Educational Environments Aimed at Developing Intercultural Understanding while Reinforcing the Use of English in Experience-Based Learning (Nuevos entornos educativos destinados a desarrollar la comprensión intercultural y a reforzar el uso del inglés mediante el aprendizaje basado en experiencias)

    ERIC Educational Resources Information Center

    Bruguier, Leonard R.; Greathouse Amador, Louise M.

    2012-01-01

    New learning environments with communication and information tools are increasingly accessible with technology playing a crucial role in expanding and reconceptualizing student learning experiences. This paper reviews the outcome of an innovative course offered by four universities in three countries: Canada, the United States, and Mexico. Course…

  18. Improving Eleventh Graders' Reading Comprehension through Text Coding and Double Entry Organizer Reading Strategies (Mejoramiento de la comprensión lectora de estudiantes de grado once mediante las estrategias de lectura de codificación de texto y organizador de doble entrada)

    ERIC Educational Resources Information Center

    Mahecha, Rocío; Urrego, Stella; Lozano, Erika

    2011-01-01

    In this article we report on an innovation project developed with a group of eleventh graders at a public school in Bogotá. Its aim was to encourage students to improve reading comprehension of texts in English. It was conducted taking into account students' needs, interests and level of English. To do it, we implemented two reading strategies:…

  19. Jordan: Background and U.S. Relations

    DTIC Science & Technology

    2012-10-03

    signed an oil shale exploration agreement with the Jordanian government. Estonia’s Enefit Eesti Energia AS also has signed agreements on oil shale...democracy assistance, water preservation, and education (particularly building and renovating public schools). In the democracy sector, U.S. assistance

  20. Jordan: Background and U.S. Relations

    DTIC Science & Technology

    2014-05-08

    an oil shale exploration agreement with the Jordanian government. Estonia’s Enefit Eesti Energia AS also has signed agreements on oil shale...of sectors including democracy assistance, water preservation, and education (particularly building and renovating public schools). In the democracy

  1. CoCom and the Future of Conventional Arms Exports in the Former Communist Bloc

    DTIC Science & Technology

    1993-12-01

    structure and background of each of these firms. The first example is the Godollo Machine Factory which was primarily involved in repair and renovation of...regularizedŚ Such an attitude is noteworthy because the potential for growth in the space industry is so great. Not only does Russia produce the " Energia

  2. Aerospace Plane Technology: Research and Development Efforts in Japan and Australia

    DTIC Science & Technology

    1991-10-01

    However, only with the develop- Aerospace Planes ment of better test facility instruments and more trained personnel, together with the renovation and...necessary. Such a rocket booster (the H-IID) would be one of the largest launchers in the world after the Soviet Energia booster and U.S. Titan IV launch

  3. Jordan: Background and U.S. Relations

    DTIC Science & Technology

    2012-05-03

    exploration agreement with the Jordanian government. Estonia’s Eesti Energia AS also has signed agreements on oil shale projects. See, “Amman Unlocks...Jordan focus on a variety of sectors including democracy assistance, water preservation, and education (particularly building and renovating public

  4. Proceedings of the Meeting of the Coastal Engineering Research Board (43rd) Held at Vicksburg, Mississippi on 22-24 May 1985.

    DTIC Science & Technology

    1985-08-01

    extensive renovation , as shown in Fig- ure 3. Total rehabilitation usually costs one-tenth to one-fourth as much as replacement with a new structure. 29...presented by Dr. Manuel da Silva, Ministerior Da Industria E Energia , Portugal. Dr. da Silva discussed the Sines breakwater failures of 1978 and 1979

  5. Jordan: Background and U.S. Relations

    DTIC Science & Technology

    2014-01-27

    Estonia’s Enefit Eesti Energia AS also has signed agreements on oil shale projects. In 2012, the Canadian company, Global Oil Shale Holdings (GOSH...variety of sectors including democracy assistance, water preservation, and education (particularly building and renovating public schools). In the

  6. The Research Laboratory of Electronics Progress Report Number 133, January 1-December 1990

    DTIC Science & Technology

    1990-12-31

    form of a working Beam Epitaxy (MOMBE) of research facility in 1990. The substantial labora- ZnSe tory renovation was completed in February; the CBE...colleagues at Bernstein Waves in Toroidal Plasmas." Pro- the Italian laboratories of E.N.E.A. ( Energia ceedings of the International Sherwood Theory

  7. Pulsed Power Bibliography. Volume 2. Annotated Bibliography.

    DTIC Science & Technology

    1983-08-01

    ENEAG? POEV SOJECES with varatle resonant frequencies is transprred to a load renovator .5 Cir.d, D.J. Fricksn. W.B. Gaps a-n CM. PowLer who the... energiaed transformer h.h frequency response in conparison to conventional from a do source end contain ontrolled suitches. Advantages of pulse

  8. Industrial Development of Siberia and the Soviet Far East.

    DTIC Science & Technology

    1984-09-01

    21 (This argument is perhaps unintentionally fed by the central leadership’s emphasis on investing in renovation and technical reequipment of...Malov, "Po programme ’ energia ’," Pravda, May 12, 1982, p. 2. " M. Matafonov, "Open up Siberia’s Treasure Houses," Sotsialisticheskaia industriia

  9. Parameters, Journal of the US Army War College, Volume 14, Number 4, Winter 1984.

    DTIC Science & Technology

    1984-01-01

    Pa.: US Army War College, Strategic Studies In- 31. A Energia Nuclear no Brasil (Rio de Janeiro: stitute, 1979), p. 17. Biblioteca do Exercito Editors...security factors exist. These would be Monetary Fund officials. "Balance of Payments," in Annual US-Mexican relationships, moral renovation , demographic

  10. JPRS Report. Science & Technology: China.

    DTIC Science & Technology

    1989-05-16

    development capacity of enterprises. They are playing a major role in leading S&T toward a new system and in renovation . 2. Management of S&T Research...HE WULI [PHYSICA ENERGIAE FORTIS ET PHYSICA NUCLEARIS] in Chinese Vol 12 No 3, May 88 pp 365-371 ™YSICA [Article by the Electron LINAC Department

  11. Jordan: Background and U.S. Relations

    DTIC Science & Technology

    2014-12-02

    Estonia’s Enefit Eesti Energia AS also has signed agreements on oil shale projects. In 2012, the Canadian company, Global Oil Shale Holdings (GOSH...variety of sectors including democracy assistance, water preservation, and education (particularly building and renovating public schools). In the

  12. Private vs. Public Investment in the Mexican Utility Company: A Case Study

    ERIC Educational Resources Information Center

    Dieck-Assad, Flory Anette

    2016-01-01

    How should the strategies and regulations of the Mexican laws be designed in order to trigger a country to go from a non-sustainable energy economy towards a sustainable energy economy? This paper proposes a classroom debate of the reformed Law of Public Electricity Service in Mexico (LSPEE, 1992: Ley del Servicio Publico de Energia Electrica),…

  13. Liquid Nitrogen Dewar Loading at KSC for STS-71 Flight

    NASA Technical Reports Server (NTRS)

    1995-01-01

    Liquid nitrogen dewar loading at Kennedy Space Center for STS-71 flight with Stan Koszelak (right), University of California at Riverside, adn Tamara Chinareva (left), Russian Spacecraft Coporation-Energia. The picture shows Koszelak removing the insert from the transportation dewar.

  14. Expedition 13 Preflight

    NASA Image and Video Library

    2006-03-26

    Nikolai Zelenschikov, Deputy General Designer, RSA- Energia, listens to the Expedition 13 crew members talk about their final check of the Soyuz spacecraft at building 254 of the Baikonur Cosmodrome in Baikonur, Kazakhstan, Sunday, March 26, 2006. Photo Credit: (NASA/Bill Ingalls)

  15. Advanced Fuels and Combustion Processes for Propulsion

    DTIC Science & Technology

    2010-09-01

    production from biomass steam reforming – Conduct a feasibility analysis of the proposed integrated process Energia Technologies - D. Nguyen & K. Parimi...strength foam material development by Ultramet – Combustion experiments performed U. Of Alabama – End-user input provided by Solar Turbines Major

  16. Stratospheric Ozone Reactive Chemicals Generated by Space Launches Worldwide.

    DTIC Science & Technology

    1994-11-01

    I ODCs). Their carbon - chlorine bond is severed in the stratosphere by solar photolysis or reaction. Once the carbon-chlorine bond is broken, the...include the Russian Proton and Energia , and the Chinese Long March series. Roughly half (seven per year) of the Ariane 4 launches use two solid strap-ons

  17. A Spanish ''Power Tower'' solar system: Project CESA-1

    SciTech Connect

    Torralbo, A.M.; Gonzalvez, M.; Lacal, J.A.; Roses, C.O.; Sanchez, F.

    1984-02-01

    Like many other countries and organizations, Spain has been developing a program to investigate the economic viability of new sources of energy. Among these, it should be pointed out, is included the large solar power systems. Within this investigation program, ''Centro de Estudios de la Energia'', an organization dependent on ''Ministerio de Industria y Energia'', is carrying out the CESA-1 Project, which consists of design, construction, start-up, and operation of a 1.2-MW Pilot Solar Power Plant. If the current technical uncertainties are removed and the power tower concept demonstrates its economical viability, Spain will be one of the most appropriate countries in the world for a full-scale implementation of this technology. For this reason, the ''Ministerio de Industria y Energia'' reached the conclusion in mid-1977 that it would be of interest to explore this technology using the domestic industrial potential. The project was approved by the Council of Ministers in June 1977 and the project begun in early 1978. The management of the Project is the direct responsibility of ''El Centro de Estudios de la Energia'' and was helped by the engineering firms Initec and Sener to attain the adequate organization to carry out the project.

  18. Assessment of the Technology and Practice for Determining Casing Degradation during Offshore Drilling Operations.

    DTIC Science & Technology

    1982-09-01

    industries. Transport of hydrocarbons Castagnet. A.COG. InStituto de Energia Atomica. Sao Paulo (Brazil). Divisao de ApI icacao de Radioisotopos na...DETECTOR*; MEETING PAPER; OPERATING CONDITION; PIPELINE*; PRESSURE: SAFETY EQUIPMENT; SOLAR ENERGY: THERMAL INSULATION: TUBE; VALVE Leaks In gas grids

  19. 78 FR 2389 - Combined Notice of Filings #1

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-11

    ...-002. Applicants: Copper Mountain Solar 1, LLC, Copper Mountain Solar 2, LLC, Energia Sierra Juarez U.S., LLC, Mesquite Power, LLC, Mesquite Solar 1, LLC, San Diego Gas & Electric Company, ] Sempra Generation.... Region of Copper Mountain Solar 1, LLC, et. al. Filed Date: 12/31/12. Accession Number:...

  20. Worldwide Report, Nuclear Development and Proliferation

    DTIC Science & Technology

    2007-11-02

    an intensive re- liance on nuclear energy, making use of its rich uranium re- serves, since other alternative sources, such as solar energy, wind...MEET OBJECTIVES Buenos Aires ENERGIA NUCLEAR in Spanish No 14 1983 pp 47-49 [Excerpts] Fuel Elements Enterprise The manufacturing technology

  1. New pipeline policy

    SciTech Connect

    Schaefgen, J.R. Jr.; Colucci, D.M.

    1996-04-01

    This article outlines regulations addressing the sale, transportation, storage, and distribution of natural gas in Mexico. The regulations were issued in November 1995 by the Comision Reguladora de Energia. The major policy decisions of the regulations are summarized. The current role of Petroleos Mexicanos (PEMEX), the state owned oil and gas entity, which formerly monopolized the Mexican industry, is discussed.

  2. 77 FR 48135 - Combined Notice of Filings #1

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-13

    ... Mountain Solar 2, LLC, Energia Sierra Juarez U.S., LLC, Flat Ridge 2 Wind Energy LLC, Fowler Ridge II Wind.../20/12. Docket Numbers: ER11-3589-002. Applicants: Long Island Solar Farm, LLC. Description: Notification of non-material change in status of Long Island Solar Farm, LLC. Filed Date: 7/30/12. Accession...

  3. Liquid Nitrogen Dewar Loading at KSC for STS-71 Flight

    NASA Technical Reports Server (NTRS)

    1995-01-01

    Liquid nitrogen dewar loading at Kennedy Space Center for STS-71 flight with Stan Koszelak (right), University of California at Riverside, adn Tamara Chinareva (left), Russian Spacecraft Coporation-Energia. The picture shows Koszelak removing the insert from the transportation dewar.

  4. Microgravity

    NASA Image and Video Library

    1995-01-01

    Liquid nitrogen dewar loading at Kennedy Space Center for STS-71 flight with Stan Koszelak (right), University of California at Riverside, adn Tamara Chinareva (left), Russian Spacecraft Coporation-Energia. The picture shows Koszelak removing the insert from the transportation dewar.

  5. A Comparison of Heavy Lift Launch Vehicle Options for the 1990’s .

    DTIC Science & Technology

    1991-09-01

    This thesis compares attributes of the heavy lift launch vehicle options that are available for the United States to use in support of the Space ... Exploration Initiative. The systems compared are the Advanced Launch System, Shuttle-C, Saturn V/F-1 and Energia. The F-1 development history is presented

  6. [First case described of isolated, complete and fluctuating cranial nerve III palsy heralding multiple myeloma].

    PubMed

    León-Ruiz, Moisés; Benito-León, Julián; Sierra-Hidalgo, Fernando; García-Soldevilla, Miguel Ángel; Izquierdo-Esteban, Laura; Tejeiro-Martínez, José; Cabrera-Valdivia, Francisco; García-Albea Ristol, Esteban

    2015-02-01

    Introduccion. El mieloma multiple es la neoplasia de celulas plasmaticas mas frecuente. Al ser incurable, el tratamiento persigue obtener el mayor tiempo de supervivencia libre de clinica. Constituye una causa extremadamente rara de afectacion de los nervios craneales y es producido habitualmente por un plasmocitoma intracraneal. Presentamos un caso de mieloma multiple, que asociaba un plasmocitoma intracraneal y que comenzo clinicamente con paralisis aislada, completa y fluctuante del III nervio craneal. Caso clinico. Mujer de 63 años que acudio a urgencias por presentar un cuadro clinico oscilante, consistente en diplopia binocular horizontal y, posteriormente, cefalea. La exploracion neurooftalmologica revelo una paralisis completa del III nervio craneal derecho. Se solicito una tomografia axial computarizada craneal urgente, que revelo multiples lesiones osteoliticas diploicas, asociando una de ellas componente de partes blandas en la hendidura esfenoidal derecha. La paciente fue ingresada, y se le diagnostico posteriormente un mieloma multiple IgA-kappa. Tras recibir induccion quimioterapica y ser sometida a un trasplante autologo de progenitores hematopoyeticos, alcanzo la remision completa. Conclusiones. El mieloma multiple es un trastorno raro de los nervios craneales, una causa muy infrecuente de paralisis aislada y completa del III nervio craneal y menos aun fluctuante, y no se ha encontrado ningun caso publicado con este inicio clinico. Tener en cuenta las posibles manifestaciones neurooftalmologicas del mieloma multiple puede contribuir a un diagnostico precoz y a una incidencia positiva sobre el curso de esta enfermedad.

  7. Roman Roads in Gaul: How Lines of Communication and Basing Support Operational Reach

    DTIC Science & Technology

    2013-12-10

    red-viaria-romana-de-hispania- mediante- tecnologias -sig-gis-and-roman-ways-research-in-hispania/; A.N. Sherwin-White, “The Tabula of Banasa and the...User Conference 2011, 23, 2011. http://evento.esri.es/es/euc/agenda/ponencia/investigacion-de-la-red-viaria-romana-de- hispania-mediante- tecnologias

  8. Development of Onboard Computer Complex for Russian Segment of ISS

    NASA Technical Reports Server (NTRS)

    Branets, V.; Brand, G.; Vlasov, R.; Graf, I.; Clubb, J.; Mikrin, E.; Samitov, R.

    1998-01-01

    Report present a description of the Onboard Computer Complex (CC) that was developed during the period of 1994-1998 for the Russian Segment of ISS. The system was developed in co-operation with NASA and ESA. ESA developed a new computation system under the RSC Energia Technical Assignment, called DMS-R. The CC also includes elements developed by Russian experts and organizations. A general architecture of the computer system and the characteristics of primary elements of this system are described. The system was integrated at RSC Energia with the participation of American and European specialists. The report contains information on software simulators, verification and de-bugging facilities witch were been developed for both stand-alone and integrated tests and verification. This CC serves as the basis for the Russian Segment Onboard Control Complex on ISS.

  9. Crew Interviews: Treschev

    NASA Technical Reports Server (NTRS)

    2002-01-01

    Sergei Treschev is a Cosmonaut of the Rocket Space Corporation Energia, (RSC), from Volynsky District, Lipetsk Region (Russia). He graduated from Moscow Energy Institute. After years of intense training with RSC Energia, he was selected as International Space Station (ISS) Increment 5 flight engineer. The Expedition-Five crew (two Russian cosmonauts and one American astronaut) will stay on the station for approximately 5 months. The Multipurpose Logistics Module, or MPLM, will carry experiment racks and three stowage and resupply racks to the station. The mission will also install a component of the Canadian Arm called the Mobile Base System (MBS) to the Mobile Transporter (MT) installed during STS-110. This completes the Canadian Mobile Servicing System, or MSS. The mechanical arm will now have the capability to "inchworm" from the U.S. Lab fixture to the MSS and travel along the Truss to work sites.

  10. US/Russian Joint Film Test

    NASA Technical Reports Server (NTRS)

    Slater, Richard

    1996-01-01

    A joint U.S./Russian film test was conducted during MIR Mission 18 to evaluate the effects of radiation on photographic film during long-duration space flights. Two duplicate sets of film were flown on this MIR mission: one set was processed and evaluated by the NASA/JSC Photographic Laboratory, and the other by the RKK Energia's Photographic Laboratory in Moscow. This preliminary report includes only the results of the JSC evaluation (excluding the SN-10 film which was not available for evaluation at the time this report was written). The final report will include an evaluation by JSC of the SN-10 film and an evaluation of the test data by the RKK Energia. ISC's evaluation of the test data showed the positive film flown was damaged very little when exposed to approximately 8 rads of radiation. Two of the three negative films were significantly damaged and the third film was damaged only moderately.

  11. Crew Interviews: Treschev

    NASA Technical Reports Server (NTRS)

    2002-01-01

    Sergei Treschev is a Cosmonaut of the Rocket Space Corporation Energia, (RSC), from Volynsky District, Lipetsk Region (Russia). He graduated from Moscow Energy Institute. After years of intense training with RSC Energia, he was selected as International Space Station (ISS) Increment 5 flight engineer. The Expedition-Five crew (two Russian cosmonauts and one American astronaut) will stay on the station for approximately 5 months. The Multipurpose Logistics Module, or MPLM, will carry experiment racks and three stowage and resupply racks to the station. The mission will also install a component of the Canadian Arm called the Mobile Base System (MBS) to the Mobile Transporter (MT) installed during STS-110. This completes the Canadian Mobile Servicing System, or MSS. The mechanical arm will now have the capability to "inchworm" from the U.S. Lab fixture to the MSS and travel along the Truss to work sites.

  12. Defense Small Business Innovation Research Program (SBIR) Volume 2. Navy Abstracts of Phase 1 Awards, 1987

    DTIC Science & Technology

    1988-04-01

    COMPUTER ANALYSES WILL BE UTILIZED IN MODELING STEADY STATE TURBINE PERFORMANCE CHARACTERISTICS, DYNAMIC BALANCE /STABILITY, DAMPING, BEARING PRELOAD... ENERGIA INC PC’ BOX 1468 PRINCETON, NJ 08542 CONTRACT NUMBER: DR MOSHE LAVID TITLE: RADIATIVE IGNITION AND COMBUSTION ENHANCEMENT FOR NAVY PROPULSION...TYPES AGAINST MULTIPLE TARGET TYPES IN A NON-HOMOGENEOUS ENVIRONMENT. DATA BASE DEFINITION INCLUDES USE OF EXISTING, USER DEFINED AND PROGRAM GENE

  13. Japan Report No. 173.

    DTIC Science & Technology

    1983-06-10

    would escalate into a world war and that military balance in the Pacific and Southeast Asia is now the big issue. Needless to say, this is based on...from the balance of seats in the Diet alone. Looking at today’s LDP Nakasone cabinet, the conservative mainstream or the con- stitutional...IN NATION DISCUSSED Rome NOTIZIARIO DELL’ENEA in English Feb 83 Supplement ENERGIA NUCLEARE pp 48-54 [Article by Takashi Mukaibo, Acting Chairman

  14. ENERGY AND SCIENCE: Five-Year Bibliography 1990-1994

    DTIC Science & Technology

    1995-12-01

    reviews the U.S. government’s efforts to support Venezuela’s energy sector. Sector de Energia en Venezuela: La Prodnccion Petrolera y las Condiciones... renovate existing laboratories or build new ones is often minimal. Four of the eight agencies recently started up task forces to reexamine their research...laboratory repairs. Moreover, funding to renovate existing laboratories or build new ones is often minimal. Four of the eight agencies recently started up

  15. In Touch With Industry: ICAF Industry Studies, 1997

    DTIC Science & Technology

    1997-01-01

    nation’s largest manufacturing sector and its second largest economic activity (CERF, 1993). In 1994, new construction and renovation made up 13 percent...primarily engaged in the construction and renovation of residential, farm, industrial, commercial, and other buildings. Heavy construction...with Russia’s RSC Energia , Ukraine’s NPO Yuzhnoye, and Norway’s Kvaerner. Sea Launch will use Ukraine’s Zenit rocket to launch payloads weighing up

  16. China Report, Science and Technology

    DTIC Science & Technology

    1987-04-29

    remote sensing technologies have been used in territorial renovation , urban planning, railway track selection, catastrophic weather monitoring...GAONENG WULI YU HE WULI [PHYSICA ENERGIAE FORTIS ET PHYSICA NUCLEARIS] in Chinese Vol 10, No 4, Jul 86 pp 385-392 [Article by Wang Taijie [3769 3141 2638...systems, which the state has made part of the plan and for which special funds are disbursed. Second is new construction, renovation and expansion

  17. Translations on People’s Republic of China, No. 467.

    DTIC Science & Technology

    1978-11-15

    his trade with us. 52 The newly established export plants are also instrumental in renovating old plants and in raising our level of production...import new technology and equipment from abroad to renovate the old plants through using subsidy grants, PRC foreign exchange reserves and loans...China. The results in physics are published in Chinese (with English summary) in the periodicals in Acta Physica Sinica and Physica Energiae Fortis

  18. Alphabetic List of All DoD Prime Contractors (No Dollars), FY83.

    DTIC Science & Technology

    1983-01-01

    RENOVATIONS COMMUNICATIONS APPLIED TECHNOLOGY COMPANIA TELEFONICA NACIONAL DE ES COMMERCIAL RENOVATIONS OF VA INC COMMUNICATIONS CORP OF AMERICA...CONSTRUCTION CO INC M F P ENTERPRISES INC M L ENERGIA INC M B R ASSOCIATES INC M F SERVICES INC M M L COMPUTERS INC M B T B ARCHITECTS & ENGINEERS INC M F...PIZZAGALLI CONSTRUCTION CO INC PINSON A-SOCIATES INC PIPELINE RENOVATION SERVICE INC PIZZOLI SPA PINTURAS ABREGO S A PIPELINE UTILITY CONSTRUCTION CO PLACE

  19. West Europe Report

    DTIC Science & Technology

    1985-05-15

    an old, abandoned industrial complex that had belonged to AEG was renovated . By 30 November 1983, the first 14 novice entrepreneurs had moved in, with...be anticipated this year due to modernization and renovation programs in the public sector. The cost of various rehabilitation programs should...by the just published INFORMACAO ENERGIA bulletin of the Energy Directorate General. The production of electricity increased 17.8 percent from 1982

  20. Concerning Variations of the Discharge Mechanism in Gasses under High Pressure,

    DTIC Science & Technology

    1983-04-22

    loskeuj.ejinAj.tI: VecisS -Energia" 1940. 141 84jiige, X.: Durchschilagoettwitee, von SP, bet Gleleh*,Wechael- viol ) Sto~sPannun’t-Iheanspcuchuing. E’TZ-A ff (1065... CIA /GCR/ADD/SD 2 AFIT/LDE I CCN 1 NIA/PHS 1 MIIS 2 LLNL/Ccxle L-389 1 NASANST-44 1 NSA/121 3/TDL 2 FTP-ID (RS) T-1848-82

  1. Combat Aircraft Noise held in Bonn, Germany on 23-25 October 1991 (Le Bruit Genere par les Avions de Combat)

    DTIC Science & Technology

    1992-04-01

    States Director del departamento de Motopropulsion y Energia Mr David J. Way INTA Superintendent Turbomachnery Crta. ce Torrejon a Ajalvir. Krn. 4 ...Aircraft Noise - The Operator’s Perspective 3 by R. Bogg Human Noise Exposure Criteria for Combat Aircraft Training Areas 4 by R.A. Lee. C.S. Harams and...of the various noise components. 4 ) Prospects for the reduction of overall noise levels by treatment of the engine based sources critically depend on

  2. Environmental restoration and waste management: An introduction. Student edition; Restauracion ambiental y administracion de residuos nucleares: Introduccion; Edicion estudiantil

    SciTech Connect

    Not Available

    1993-12-31

    For more than 40 years, the United States has produced nuclear weapons. These production activities generated both radioactive and hazardous waste and often contaminated the environment. For many years, the public was unaware of the problem and unable to do anything about it. All of this has changed. In response to recent public outcry, the former Secretary of Energy, Retired Admiral James D. Watkins, established the Office of Environmental Restoration and Waste Management (EM) in November 1989. The creation of EM was the first step toward correcting contamination problems from the past 40 years In this booklet, we at DOE, through the efforts of the students at Oak Hills High School of Cincinnati, Ohio, will introduce you to EM and encourage your involvement in this major program within the Department of Energy. [Espanol] Durante mas de 40 anos, los Estados Unidos fabricaron armamentos nucleares. Esta produccion genero residuos radiactivos y peligrosos y, en muchos casos, contaminaron el medio ambiente. Durante mucho tiempo, el publico norteamericano no tenia conocimiento de este problema y no pudo hacer nada para solucionarlo. Todo esto ha cambiado. Respondiendo a crecientes protestas publicas, el ex Secretario de Energia Almirante James D. Watkins, establecio en noviembre de 1989 la Subsecretaria de Administracion Ambiental. La creacion de esta Subsecretaria fue el primer paso que dio el Departamento de Energia para corregir los problemas de contaminacion ambiental de los ultimos 40 anos. En esta publicacion, los que trabajamos en el Departamento de Energia con la ayuda de los estudiantes de la Escuela Secundaria de Oak Hills, Cincinnati, Ohio, te introduciermos a la administracion ambiental y alentamos tu participacion en este programa de fundamental importancia en el Departamento de Energia.

  3. Expedition 19 Docks to ISS

    NASA Image and Video Library

    2009-03-27

    Managers from NASA, Roscosmos, RSC-Energia, TsNIIMash and other related agencies answer reporters questions during a Soyuz post-docking press conference at the Russian mission Control Center in Korolev, Russia on Saturday March 28, 2009. The Soyuz TMA-14 docked to the International Space Station carrying Expedition 19 Commander Gennady I. Padalka, Flight Engineer Michael R. Barratt and Spaceflight Participant Charles Simonyi. Photo Credit: (NASA/Bill Ingalls)

  4. Expedition 19 Docks to ISS

    NASA Image and Video Library

    2009-03-27

    Vitaly Lopota, President, General Designer, RSC-Energia, answers reporters questions during a Soyuz post-docking press conference at the Russian mission Control Center in Korolev, Russia on Saturday March 28, 2009. The Soyuz TMA-14 docked to the International Space Station carrying Expedition 19 Commander Gennady I. Padalka, Flight Engineer Michael R. Barratt and Spaceflight Participant Charles Simonyi. Photo Credit: (NASA/Bill Ingalls)

  5. Expedition 19 Docks to ISS

    NASA Image and Video Library

    2009-03-27

    Managers from NASA, Roscosmos, RSC-Energia and other related agencies answer reporters questions during a Soyuz post-docking press conference at the Russian mission Control Center in Korolev, Russia on Saturday March 28, 2009. The Soyuz TMA-14 docked to the International Space Station carrying Expedition 19 Commander Gennady I. Padalka, Flight Engineer Michael R. Barratt and Spaceflight Participant Charles Simonyi. Photo Credit: (NASA/Bill Ingalls)

  6. Expedition 38 State Commission

    NASA Image and Video Library

    2013-11-06

    President of RSC Energia, Designer General V.A. Lopota, talks during the State Commission meeting to approve the Soyuz rocket launch of Expedition 38 Soyuz Commander Mikhail Tyurin of Roscosmos, Flight Engineer Koichi Wakata of the Japan Aerospace Exploration Agency, and, Flight Engineer Rick Mastracchio of NASA for a six month mission aboard the International Space Station, Wednesday, Nov. 6, 2013 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Photo Credit: (NASA/Bill Ingalls)

  7. Treatment of Spent Argentine Ion Exchange Resin Using Vitrification - Results of FY01 Testing at the Savannah River Technology Center

    SciTech Connect

    Crawford, C.L.

    2002-08-14

    Under the Science and Technology Implementing Arrangement for Cooperation on Radioactive and Mixed Waste Management (JCCRM), the Department of Energy (DOE) is helping to transfer waste treatment technology to international atomic energy commissions. In 1996, as part of the JCCRM, DOE established a collaborative research agreement with Argentina's Comision Nacional de Energia Atomica (CNEA). A primary mission of the CNEA is to direct waste management activities for Argentina's nuclear industry.

  8. Swept Line Electron Beam Annealing of Ion Implanted Semiconductors.

    DTIC Science & Technology

    1982-07-01

    a pre- liminary study using silicon solar cells. This work was undertaken in cooperation with Dr. J. Eguren of the Instituto De Energia Solar , Madrid...device fabrication has been attempted. To date, resistors, capacitors, diodes, bipolar transistors, MOSFEs, and solar cells have been fabricated with...34 " 48 *Si Solar Cells Ruby PL P+ Ion-Implanted 49 Ruby PL Pulsed Diffused 50 :C

  9. Beam Line and Associated Work: Operational Phase 1985-1987

    DTIC Science & Technology

    1988-08-26

    ENEA FEL experiment. F. Cicci, E. Fiorentino. A. Ranieri, E. Sabie. Centro Ricerche Energia Frascati (Italy?. ....................... 169 582.25...C) knife-edge pinhole bracket (cf. Fig. 14); (D) beam stop; (E) calorimeter with an attached Si solar cell detector; (F) paddle with tilted platforms...used for T real-time signal pickup behind the slit was a standard Si solar cell, epoxied to the calorimeter case (detail . in Fig. 5). The experimental

  10. U.S. Access to Space Launch Vehicle Choices for 1990-2010

    DTIC Science & Technology

    1990-03-01

    own study of future space goals included a range of options such as increased study of the Earth, unmanned explorr-.oi. of the Solar System, and human...and activity beyond Earth orbit into the solar system.ř This could result in the establishment of a permanently manned lunar base, expeditions to...6, -8, -11, and -14 derived from ballistic missile systems and the SI,12, -13, and -16. The SL-X.17 booster, ’ Energia ," is still undergoing flight

  11. Alternatives for Future U.S. Space-Launch Capabilities

    DTIC Science & Technology

    2006-10-01

    directive issued on January 14, 2004—called the new Vision for Space Exploration (VSE)—set out goals for future exploration of the solar system using...of the solar system using manned spacecraft. Among those goals was a proposal to return humans to the moon no later than 2020. The ultimate goal...U.S. launch capacity exclude the Sea Launch system operated by Boeing in partnership with RSC- Energia (based in Moscow), Kvaerner ASA (based in Oslo

  12. European Scientific Notes. Volume 38, Number 4.

    DTIC Science & Technology

    1984-04-01

    R.L. Carovillano 218 The Seventh European Regional Astronomy meeting dealt with almost every area of astronomy; coverage included solar ...in the 25- to found in areas as diverse as electro- 35-m range at the Comitato Nazionale optics and pharmacology. Energia Nucleare laboratory in...physics research has led to knowledge gained in one area (or param- many discoveries in the solar system and eter domain) to another area that lacks to

  13. A Representative Survey of U.S. Space Systems and Methods for Estimating Their Costs

    DTIC Science & Technology

    1992-11-01

    66 7. Orbiting Geophysical Observatory ................................................ 69 3 8. Orbiting Solar O...However, it failed to lift off after four attempts made between 1969 and 1972. The Soviet Union’s largest launch vehicle to date, the Energia , made its... Solar array system, held Dec 71 MSFC accepted the flight MDA Sep 72 ATM delivered, OWS arrived by barge to KSC May 73 Skylab OWS launched Skylab 2

  14. The persistent dream - Soviet plans for manned lunar missions.

    NASA Astrophysics Data System (ADS)

    Van Den Abeelen, L.

    Soviet hopes of achieving the supreme space `first' were crushed in July 1969 when an American became the first human on the Moon. Following the four unsuccessful flight tests of the N1 lunar booster, the Soviet manned lunar landing effort was officially suspended, but even as the Russians were denying they had ever planned to land a cosmonaut on the moon, NPO Energia was designing craft for a long-term scientific, even semi-industrial presence on the lunar surface.

  15. Area Handbook Series: Portugal, A Country Study

    DTIC Science & Technology

    1993-01-01

    Aguas Livres ) that brought water to Lisbon. Jodo encouraged the development of decorative arts such as furniture design, clock- making, and tapestry...Energy. 0 sector empresarial do es- tado na indulstria e energia : Andlise e propostas de atuWdo. Lisbon: 1984. __ ._ Presid~ncia do Conselho. IV Piano de...xxv; reversed, 98 appointments by, 188, 190-91, 266, Aqueduct of Free Waters, 39 268, 269; committees of, 189; constit- Aqueduto das Aguas Livres . Se

  16. Mir 1 cooperative solar array photovoltaic panel production

    SciTech Connect

    Wilkinson, W.

    1995-12-31

    This paper describes the production and on-schedule delivery to Russia of 80-watt solar array panels by Lockheed Missiles and Space Co., Inc. Ninety flight-ready panels were delivered to RSC-Energia in Kaliningrad near Moscow in November and December 1994. After assembly by the Russians they are scheduled to be delivered in October 1995 by the US Space Shuttle Atlantis (STS-74) to the Russian Mir 1 module of International Space Station Alpha.

  17. KSC-99pp0342

    NASA Image and Video Library

    1999-03-25

    Two Shuttle crews take part in familiarization activities at Astrotech in Titusville, Fla. From left are STS-101 Mission Specialist Jeffrey N. Williams and Yuri Ivanovich Malenchenko, with the Russian Space Agency; STS-96 Mission Specialist Tamara E. Jernigan; STS-101 Mission Specialist Edward Tsang Lu (leaning over); a technician with RSC Energia of Korolev, Russia; Manfred Nordhoff, with DaimlerChrysler Aerospace; STS-96 Mission Specialist Daniel T. Barry; and another technician with RSC Energia. They are looking at components of the Russian cargo crane, Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler Aerospace of Bremen and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999

  18. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Two Shuttle crews take part in familiarization activities at Astrotech in Titusville, Fla. From left are STS-101 Mission Specialist Jeffrey N. Williams and Yuri Ivanovich Malenchenko, with the Russian Space Agency; STS-96 Mission Specialist Tamara E. Jernigan; STS-101 Mission Specialist Edward Tsang Lu (leaning over); a technician with RSC Energia of Korolev, Russia; Manfred Nordhoff, with DaimlerChrysler Aerospace; STS-96 Mission Specialist Daniel T. Barry; and another technician with RSC Energia. They are looking at components of the Russian cargo crane, Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler Aerospace of Bremen and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  19. [GLUTAMINE AS AN AID IN THE RECOVERY OF MUSCLE STRENGTH: SYSTEMATIC REVIEW OF LITERATURE].

    PubMed

    Hernández Valencia, Sandra Elvia; Méndez Sánchez, Lucía; Clark, Patricia; Moreno Altamirano, Laura; Mejía Aranguré, Juan Manuel

    2015-10-01

    Antecedentes: la pérdida de fuerza del músculo esquelético es frecuente tras una lesión traumática o en el postquirúrgico ortopédico. Además de los esquemas de ejercicio de fuerza y/o resistencia para su tratamiento, ha sido propuesto como auxiliar el uso de algunos aminoácidos como la glutamina (Gln), de manera aislada o combinada con otros nutrimentos. Sin embargo, la información sobre la eficacia de la suplementación oral con Gln durante los esquemas de ejercicio de fuerza y/o resistencia en adultos con déficit de fuerza es inconsistente. Objetivo: evaluar la solidez de la evidencia disponible del efecto de la suplementación oral con Gln sobre la fuerza muscular, junto con esquemas de ejercicio de fuerza y/o resistencia en adultos con déficit de fuerza muscular. Métodos: se realizó una búsqueda sistemática en diferentes bases de datos, de ensayos clínicos reportados desde el año 1980 a 2014, en idioma inglés y español, sobre suplementación oral con Gln aislada o combinada con otros nutrimentos, con grupo control, en adultos con déficit de fuerza, bajo esquemas de ejercicio de fuerza y/o resistencia, seguimiento menor a un año y fuerza muscular como desenlace primario. Resultados: de 661 artículos, se identificaron seis estudios relevantes. El estudio con más participantes que evaluó la Gln aislada no sugiere cambios entre los grupos, solo una mejoría en la percepción de la debilidad muscular. Los estudios que evaluaron la Gln con otros nutrimentos reportan resultados a favor de esta. No fue posible realizar un metanálisis. Conclusiones: actualmente no se dispone de suficientes datos de los efectos relacionados con la Gln sobre el déficit de fuerza muscular durante esquemas de ejercicio en adultos. Se requiere mayor investigación al respecto para responder con mayor solidez sobre este hecho.

  20. Transient hyperthyroidism after total laryngectomy for laryngeal cancer.

    PubMed

    Salazar Thieroldt, Eduardo; Boado Lama, Jorge; Molinero Abad, Sheila; Miján de la Torre, Alberto

    2014-10-24

    Introducción: La tiroitidis postquirúrgica es una complicación de la laringectomía total (TL) y pueden ser causada por manipulación de la glándula. Existen descripciones aisladas en la literatura referentes a hipertiroidismo transitorio (HT) en el postoperatorio de cirugía de cabeza y cuello. El objetivo del presente estudio es relacionar la frecuencia de HT tras TL y evaluar su relación con el procedimiento quirúrgico. Métodos: Estudio de cohorte retrospectiva. Se incluyeron 44 pacientes y se estratificaron en Grupo 1 (TL y faringectomía), y grupo 2 (TL y disección cervical). Se midió la función tiroidea postoperatoria a todos los pacientes. Los resultados fueron analizados con el test de chi cuadrado con corrección de Yates y OR (p.

  1. On sopro do magnetar

    NASA Astrophysics Data System (ADS)

    Allen, M. P.; Horvath, J. E.

    2003-08-01

    Magnetares sao estrelas de nêutrons com campos magnéticos acima do limiar quântico de 4,4´1013 G. Por causa desse intenso campo magnético, que exige período de rotação inicial da ordem de 1 ms, o torque eletromagnético é capaz de injetar 2´1052 erg, em menos de um dia, no Remanescente de Supernova (RSN) formado por ocasião da formação do magnetar. A energia injetada acelera a expansão do RSN, de modo que estimativas de idade do RSN feitas sem considerar a injeção de energia superestimarão a idade verdadeira. Além do cenário usual de formação de magnetares em colapsos gravitacionais de estrelas massivas, estudamos a possibilidade de formação dos mesmos através do Colapso Induzido por Acresção em anãs brancas. Estudamos, através de simulação numérica unidimensional, com diversas massas ejetadas e diversas densidades de meio interestelar local, as associações propostas entre candidatos a magnetar e RSNs, incluindo a injeção de energia. Concluímos que aproximadamente metade delas podem ser verdadeiras, e determinamos a faixa de velocidades e idades possíveis de cada associação. As incertezas observacionais a respeito do tamanho e densidade do meio interestelar local limitam a acurácia da análise.

  2. Vínculos sobre um modelo de quartessência de Chaplygin usando observações do satélite chandra da fração de massa de gás em aglomerados de galáxias

    NASA Astrophysics Data System (ADS)

    de Souza, R. S.

    2003-08-01

    Observações de Supernovas do tipo Ia mostram que a expansão do Universo está acelerando. Segundo as equações de Einstein uma componente com pressão negativa (energia escura) é necessária para explicar a aceleração cósmica. Além da energia escura é usualmente admitido que no Universo há também uma matéria exótica com pressão zero, que é chamada de matéria escura. Essa componente possui um papel fundamental na formação de estruturas no Universo. Recentemente tem se explorado a possibilidade de que matéria e energia escura poderiam ser unificadas através de uma única componente, que tem sido denominada de quartessência. Um exemplo de fluido com essas características é o Gás de Chaplygin Generalizado, que possui uma equação de estado da forma p = -A/ra. Inicialmente consideramos o caso especial a = 1 (gás de Chaplygin) e vinculamos parâmetros do modelo utilizando observações em raios-X do satélite Chandra da fração de massa de gás em aglomerados de galáxias. Uma comparação dos vínculos obtidos com esse teste com outros testes, tais como supernovas e idade do Universo, mostra que esse teste é bastante restritivo. Exibiremos ainda resultados para o caso em que a curvatura é nula e o parâmetro a está compreendido no intervalo -1 < a 1.

  3. Prospect of HIP application in aerospace and power plant industry

    SciTech Connect

    Boris, B.I.; Genrikh, G.S.; Oleg, F.Ch.

    1996-12-31

    Technology used in production of PM superalloy disks and shafts for military and civil aircraft engines was proposed in published works of Academicians A.F. Bewlov, A.I. Tselicov, Professor N.F. Anoshkin, their disciples and associates about 20 years ago. This technology determined progress in this field for all preceding years and played a remarkable role in both aviation material science and aerospace. This technology contributed to successful development of gas turbine engines for such dazzling specimens of Soviet aircraft and space vehicles as MiG-29, MiG-31, IL-096, TU-204, IL-114, Energia-Buran rocket-space shuttle system, etc.

  4. Synchronous Generators with Superconductive Excitation Windings,

    DTIC Science & Technology

    1983-07-27

    Rozyci English pages: 23 B Distribution/_____ Source-: Gospodarka Paliwami i Energia , Vol. 24, aAvailability Cadeg Nr.4(263), 1976, pp. 12-17 1i vi~aIIand...1I. In industrially advanced countries the unit power of synchronous gene - rators doubles over a period of 7 to 10 years. It can be assumed that if the...not occur in a superconductor. However, in the loss balance one must take into account the expenditure of energy required for abstraction of heat

  5. Estatística de lentes gravitacionais e o gás de chaplygin generalizado

    NASA Astrophysics Data System (ADS)

    Oliveira, A. L. S.

    2003-08-01

    A estatística de lentes gravitacionais constitui uma poderosa ferramenta utilizada na obtenção de vínculos sobre parâmetros cosmológicos, principalmente sobre modelos com uma constante cosmológica. Embora de forma às vezes controversa, antes de 1998, a análise tradicional mostrava que modelos com o parâmetro de densidade da matéria da ordem da unidade são preferidos. Esse resultado começou a ser questionado, alguns anos atrás, com as indicações, advindas da análise de supernovas com alto valor de desvio para o vermelho, de que nosso Universo está acelerando. Atualmente há enorme interesse em saber qual é a natureza da componente responsável pela aceleração cósmica. Energia escura é a denominação usual dessa componente e sua característica principal é possuir pressão negativa. Nos modelos cosmológicos tradicionais, além da energia escura, considera-se também uma outra componente de origem desconhecida. Ela é denominada matéria escura e possui pressão nula. Mais recentemente modelos unificadores em que energia escura e matéria escura são manifestações distintas de um mesmo fluido (altas densidades matéria escura, baixas densidades energia escura) foram sugeridos. Um desses modelos é conhecido como Gás de Chaplygin Generalizado que é o modelo que investigaremos. Em nosso trabalho apresentamos vínculos sobre parâmetros desse modelo usando a estatística de lentes gravitacionais. Usamos observações de quasares na faixa do visível e consideramos extinção em nosso estudo. Análises semelhantes anteriores com esse tipo de objetos e que não consideram extinção são inconsistentes. Comparação dos vínculos obtidos através de lentes gravitacionais com outros advindos de outros testes será também apresentada.

  6. Experimental optimization of the FireFly 600 photovoltaic off-grid system.

    SciTech Connect

    Boyson, William Earl; Orozco, Ron; Ralph, Mark E.; Brown, Marlene Laura; King, David L.; Hund, Thomas D.

    2003-10-01

    A comprehensive evaluation and experimental optimization of the FireFly{trademark} 600 off-grid photovoltaic system manufactured by Energia Total, Ltd. was conducted at Sandia National Laboratories in May and June of 2001. This evaluation was conducted at the request of the manufacturer and addressed performance of individual system components, overall system functionality and performance, safety concerns, and compliance with applicable codes and standards. A primary goal of the effort was to identify areas for improvement in performance, reliability, and safety. New system test procedures were developed during the effort.

  7. Final Environmental Assessment, Outgrant for Construction and Operation of a Solar Photovoltaic System in Area I, Nellis Air Force Base, Clark County, Nevada

    DTIC Science & Technology

    2011-03-01

    metro de d•sltlbuoloo de energfa. El sistema perm itirla a los 1Q a 15 megavallos de conionte alltma de enefgla renovables I Ia base aer&a de NeUls...oparacl6ra de un sistema solar fotovojtaico compuesto por paneles solares y una nueva linea de metro de dstrib,UCi6n de energia . El sistema P.Srtnitirfa a...los tO a 15 megavatios de eonieflte alterna de energfa renovables a Ia base aerea de Nel!js. La locallzaci6n propuesta para el sistema fotovoltaico

  8. Dollar Summary of Prime Contract Awards by Contractor, State or Country, and Place, FY83, Part 2 (Gillespie Delorenzo Asla & Assocs-Planning Analysis Corp).

    DTIC Science & Technology

    1983-01-01

    BURLINGTON MASS 85 85 85 85 N L AVIATION LTD UN KINGDOM 2,558 273 2,285 2,556 273 2,285 M L ENERGIA INC PRINCETON NEW JERSEY 28 28 28 28 M M L...155 155 PIPE INC PORTSMOUTH VIRGINIA 588 588 743 743 PIPE INSTALLATION CORP ATCO ILw jE6EY 42 42 42 42 PIPELINE RENOVATION SERVICE INC FORT BRAGG NCAR...107 107 PIPELINE RENOVATION SERVICE INC LANGLEY AFB VIRGINIA 205 161 44 PIPELINE RENOVATION SERVICE INC NORFOLK VIRGINIA 248 248 560 268 248 44

  9. East Europe Report

    DTIC Science & Technology

    1986-01-23

    Mezögazdasäg, erdögazdäl- kodäs, vizgazdälkodäs 2,5% LfKözlekedes, tävközles 0,9% Lakossag 8,1% LEgyeb 9,6% -Ipar78,9% (2)VILLAM0S- ENERGIA ...1970’s centered around renovation of the completely used up infrastructure and the obsolete, dangerous buildings. It turned out, however, that the... renovation . [Question] But reconstruction began in 1976.... [Answer] Right. But this did not prove successful. The reason partly was that it began

  10. U.S.-Latin American Nuclear Relations: From Commitment to Defiance

    DTIC Science & Technology

    2012-09-01

    CountryStatisticsLandingPage.aspx (accessed 15 September 2012); Irma Argüello, “La Energía Nuclear en América Latina: Entre el Desarrollo Económico y los Riesgos de Proliferación...NPSGlobal, Fall 2010, available at: http://npsglobal.org/esp/analisis/1101-energia-nuclear-america- latina- desarrollo -economico-riesgos...September 2012). 7 See Irma Argüello, La Energía Nuclear en América Latina: Entre el Desarrollo Económico y los Riesgos de Proliferación

  11. New sources of debt

    SciTech Connect

    Anderson, J.

    1996-04-01

    Financing of power projects in Latin America is discussed in this article. Financial arrangements for a cogeneration project in Chile and a generating plant in Argentina are outlined. The Chilean project, Petropower Energia Limitada, is a subsidiary of Foster Wheeler Corporation and Chile`s state owned oil company. The Central Termica Patagonia generating plant in Argentina will be built by Amoco Power Resources Corporation in partnership with Camuzzi Argentina. Very brief descriptions of funding for projects in Bolivia, Colombia, Brazil, and Ecuador are also provided.

  12. Unifying dose specification between clinical BNCT centers in the Americas

    SciTech Connect

    Riley, K. J.; Binns, P. J.; Harling, O. K.; Kiger, W. S. III; Gonzalez, S. J.; Casal, M. R.; Longhino, J.; Larrieu, O. A. Calzetta; Blaumann, H. R.

    2008-04-15

    A dosimetry intercomparison between the boron neutron capture therapy groups of the Massachusetts Institute of Technology (MIT) and the Comision Nacional de Energia Atomica (CNEA), Argentina was performed to enable combined analyses of NCT patient data between the different centers. In-air and dose versus depth measurements in a rectangular water phantom were performed at the hyperthermal neutron beam facility of the RA-6 reactor, Bariloche. Calculated dose profiles from the CNEA treatment planning system NCTPlan that were calibrated against in-house measurements required normalizations of 1.0 (thermal neutrons), 1.13 (photons), and 0.74 (fast neutrons) to match the dosimetry of MIT.

  13. Expedition 38 Prelaunch

    NASA Image and Video Library

    2013-11-07

    General Director of the Russian Federal Space Agency, Roscosmos, Oleg Ostapenko, left, and, President of RSC Energia, Designer General V.A.Lapota, right, assist Expedition 38 Soyuz Commander Mikhail Tyurin of Roscosmos, as he and fellow crew members, Flight Engineer Koichi Wakata of the Japan Aerospace Exploration Agency, behind Tyurin, and, Flight Engineer Rick Mastracchio of NASA, far back, walk to the soyuz rocket for their launch to the International Space Station, Thursday, Nov. 7, 2013, in Baikonur, Kazakhstan. Tyurin, Wakata, and, Mastracchio will launch in their Soyuz TMA-11M spacecraft to the International Space Station to begin a six-month mission. Photo Credit: (NASA/Bill Ingalls)

  14. PIRS Images

    NASA Image and Video Library

    2001-01-01

    JSC2001-E-26680 --- One of a series of three photos of the next station module that will launch--the Russian Docking Compartment, named Pirs, the Russian word for pier. The module is planned for launch from Baikonur Sept. 14, and to dock with the station on Sept. 16. It will serve as a Russian airlock for the station and also will provide a docking port for Soyuz or Progress craft arriving at the station. This image shows the Pirs under construction at Energia in Moscow.

  15. jsc2011e027535

    NASA Image and Video Library

    2011-03-21

    At the Baikonur Cosmodrome in Kazakhstan, Expedition 27 Flight Engineer Ron Garan of NASA (left), Soyuz Commander Alexander Samokutyaev (center) and Flight Engineer Andrey Borisenko (right) are greeted upon their arrival March 21, 2011 by RSC-Energia Vice-President Nikolai Zelenchikov after their flight to the launch site from Star City, Russia. The trio, and their backups, Anatoly Ivanishin, Anton Shkaplerov and Dan Burbank are in the final weeks of training for their launch April 5 (April 4, U.S. time) on the Soyuz TMA-21 spacecraft to the International Space Station. Credit: NASA/Victor Zelentsov

  16. Expedition 9 Soyuz Rollout

    NASA Image and Video Library

    2004-04-16

    Alexander Zelenschikov, the Deputy Chief Designer of RSC-Energia, stands outside a processing facility at the Baikonur Cosmodrome as the Soyuz TMA-4 capsule and its booster rocket start the rollout to the launch pad on Saturday, April 17, 2004, in Baikonur, Kazakhstan, in preparation for the launch of the Expedition 9 crew and a European researcher to the International Space Station April 19. The Soyuz vehicle is transported to the launch pad horizontally on a railcar from its processing hangar in a process that takes about 2.5 hours to complete. Photo Credit: (NASA/Bill Ingalls)

  17. Expedition 32 Preflight

    NASA Image and Video Library

    2012-07-15

    Expedition 32 Flight Engineer Sunita Williams, right, Soyuz Commander Yuri Malenchenko and JAXA Flight Engineer Akihiko Hoshide, left, receive a formal go for launch from Vitaly Alexandrovich Lopota, President of Energia, left, and Vladimir Popovkin, Director of Roscosmos prior to their launch onboard the Soyuz TMA-05M on Sunday, July 15, 2012 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Malenchenko, Williams and Hoshide onboard launched at 8:40 a.m. later that morning Kazakhstan time. Photo Credit: (NASA/Victor Zelentsov)

  18. PIRS Images

    NASA Image and Video Library

    2001-01-01

    JSC2001-E-26679 --- One of a series of three photos of the next station module that will launch--the Russian Docking Compartment, named Pirs, the Russian word for pier. The module is planned for launch from Baikonur Sept. 14, and to dock with the station on Sept. 16. It will serve as a Russian airlock for the station and also will provide a docking port for Soyuz or Progress craft arriving at the station. This image shows the Pirs under construction at Energia in Moscow.

  19. Expedition 31 Crew Prepares For Launch

    NASA Image and Video Library

    2012-05-15

    Expedition 31 Flight Engineer Joe Acaba, left, Soyuz Commander Gennady Padalka, and, Flight Engineer Sergei Revin, right, receive a formal go for launch from Vitaly Alexandrovich Lopota, President of Energia, left, and Vladimir Popovkin, Director of Roscosmos prior to their launch onboard the Soyuz TMA-04M on Tuesday, May 15, 2012 at the Baikonur Cosmodrome in Kazakhstan. The Soyuz spacecraft with Padalka, Revin, and Acaba onboard, launched at 9:01 a.m. Kazakhstan time on Tuesday, May 15. Photo Credit: (NASA/GCTC/Andrey Shelepin)

  20. jsc2011e215337

    NASA Image and Video Library

    2011-12-08

    The three crewmembers who will round out the Expedition 30 crew on the International Space Station are greeted by Nikolai Zelinchikov of Soyuz spacecraft manufacturer RSC-Energia upon their arrival in Baikonur, Kazakhstan Dec. 8, 2011 for final pre-launch preparations. From left to right are NASA Flight Engineer Don Pettit, Soyuz Commander Oleg Kononenko, Flight Engineer Andre Kuipers of the European Space Agency and Zelinchikov. Pettit, Kononenko and Kuipers will launch to the station on Dec. 21 from the Baikonur Cosmodrome on the Soyuz TMA-03M spacecraft. Courtesy: NASA

  1. Expedition 33 Prelaunch

    NASA Image and Video Library

    2012-10-23

    Expedition 33/34 Russian Cosmonaut and Soyuz Commander Oleg Novitskiy is escorted to the Soyuz rocket by President of the S.P. Korolev Rocket and Space Corporation Energia Vitaly Lopota, prior to his launch onboard a Soyuz TMA-06M spacecraft with fellow crew members, NASA Astronaut and Flight Engineer Kevin Ford, and, Russian Cosmonaut and Flight Engineer Evgeny Tarelkin, Tuesday, October 23, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Ford, Novitskiy and Tarelkin on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

  2. ANL progress on the cooperation with CNEA for the Mo-99 production : base-side digestion process.

    SciTech Connect

    Gelis, A. V.; Quigley, K. J.; Aase, S. B.; Bakel, A. J.; Leyva, A.; Regalbuto, M. C.; Vandegrift, G. F.; Chemical Engineering

    2004-01-01

    Conversion from high-enriched uranium (HEU) to low-enriched uranium (LEU) targets for the Mo-99 production requires certain modifications of the target design, the digestion and the purification processes. ANL is assisting the Argentine Comision Nacional de Energia Atomica (CNEA) to overcome all the concerns caused by the conversion to LEU foil targets. A new digester with stirring system has been successfully applied for the digestion of the low burn-up U foil targets in KMnO4 alkaline media. In this paper, we report the progress on the development of the digestion procedure with stirring focusing on the minimization of the liquid radioactive waste.

  3. Terminology and Assessment Methods of Solid Propellant Rocket Exhaust Signatures (Methodes d’Evaluation des Signatures des Propulseurs a Propergol Solide)

    DTIC Science & Technology

    1993-02-01

    11 69D-80tJ0 Mu~nchcn 80 Spain Mr D,M. Barreiros Dr R. Dirscherl Departemento Energia y Deutsche Aerospace Propulsion Abteilung VAR 331 INTA Postfach... Solar scattering from less thtan a factor at I1) for smokte bmoke a Search lightl effert Near infrared S Glood S Poor P lrobably figir but relatively...rotational systems 8.01 to00o or solar aind earthishine regioni lredictiolls cai be made to a (1 Molecular Ilybrlde relatioii factor or 5 (I F. I [CI 1120) a

  4. Solar system exploration - Some thoughts on techniques and technologies

    NASA Technical Reports Server (NTRS)

    Bekey, Ivan

    1990-01-01

    Some techniques and technologies for proposed interplanetary missions are described. Methods for reducing the effect of zero gravity on humans during missions to Mars and the moon, and the need for launch vehicles with increased lift capability are discussed. The use of nuclear power, liquid oxygen from the moon, and helium 3 as propellants for spacecraft is examined. The development and capabilities of the Shuttle Z vehicle are considered. Attention is given to the Space Station Freedom and Energia. A launch vehicle concept which utilizes the Shuttle Z for a mission to Mars is presented.

  5. Solar system exploration - Some thoughts on techniques and technologies

    NASA Technical Reports Server (NTRS)

    Bekey, Ivan

    1990-01-01

    Some techniques and technologies for proposed interplanetary missions are described. Methods for reducing the effect of zero gravity on humans during missions to Mars and the moon, and the need for launch vehicles with increased lift capability are discussed. The use of nuclear power, liquid oxygen from the moon, and helium 3 as propellants for spacecraft is examined. The development and capabilities of the Shuttle Z vehicle are considered. Attention is given to the Space Station Freedom and Energia. A launch vehicle concept which utilizes the Shuttle Z for a mission to Mars is presented.

  6. Space Station Freedom - Approaching the critical design phase

    NASA Technical Reports Server (NTRS)

    Kohrs, Richard H.; Huckins, Earle, III

    1992-01-01

    The status and future developments of the Space Station Freedom are discussed. To date detailed design drawings are being produced to manufacture SSF hardware. A critical design review (CDR) for the man-tended capability configuration is planned to be performed in 1993 under the SSF program. The main objective of the CDR is to enable the program to make a full commitment to proceed to manufacture parts and assemblies. NASA recently signed a contract with the Russian space company, NPO Energia, to evaluate potential applications of various Russian space hardware for on-going NASA programs.

  7. Practical methods for near-term piloted Mars missions

    NASA Technical Reports Server (NTRS)

    Zubrin, Robert M.; Weaver, David B.

    1993-01-01

    An evaluation is made of ways of using near-term technologies for direct and semidirect manned Mars missions. A notable feature of the present schemes is the in situ propellant production of CH4/O2 and H2O on the Martian surface in order to reduce surface consumable and return propellant requirements. Medium-energy conjunction class trajectories are shown to be optimal for such missions. Attention is given to the backup plans and abort philosophy of these missions. Either the Russian Energia B or U.S. Saturn VII launch vehicles may be used.

  8. A methodology for selective removal of orbital debris

    NASA Technical Reports Server (NTRS)

    Ash, R. L.; Odonoghue, P. J.; Chambers, E. J.; Raney, J. P.

    1992-01-01

    Earth-orbiting objects, large enough to be tracked, were surveyed for possible systematic debris removal. Based upon the statistical collision studies of others, it was determined that objects in orbits approximately 1000 km above the Earth's surface are at greatest collisional risk. Russian C-1B boosters were identified as the most important target of opportunity for debris removal. Currently, more than 100 in tact boosters are orbiting the Earth with apogees between 950 km and 1050 km. Using data provided by Energia USA, specific information on the C-1B booster, in terms of rendezvous and capture strategies, was discussed.

  9. Catalog of known hot springs and thermal place names for Honduras

    SciTech Connect

    Finch, R.C.

    1986-08-01

    Thermal place names were compiled from all 1:50,000 topographic quadrangle maps for the Republic of Honduras as of July 1986, from other published maps, and from several sources of unpublished data. Known hot spring sites include those visited by Empresa Nacional de Energia Electrica (Honduras) geologists, sites visited by Los Alamos geologists in 1985, and other sites known to R.C. Finch. The number of known hot spring sites in Honduras with temperatures >30/sup 0/C is 125. In addition, 56 thermal sites are suspected on the basis of thermal place names. The total number of geothermal sites, known and suspected, is 181.

  10. Space Vehicle Flight Mechanics (La Mecanique du Vol des Vehicules Spatiaux)

    DTIC Science & Technology

    1990-06-01

    a Russian transport payloads back and forth version of the NASA Shuttle, with to, say a 300 km orbit, is the Energia booster. The vehicle...rotation de la Terre -1 tour/jour sld6ral, et test alors iheure siddrale de Greenwich. Un calcul assez fastidieux, d~tail16 dans le livre de Kaula (6...tranafert tri-impulsionnel, une impulsion aasez importante (1a premibre) eat d~ livr ~e au voisinage du pd ig6e de l’orbite GTO, ci qui pourrait slavdrer g

  11. A panchromatic view of the evolution of Supermassive Black Holes

    NASA Astrophysics Data System (ADS)

    Lusso, E.; Brusa, M.; Comastri, A.; Vignali, C.; Gilli, R.

    2008-10-01

    Verranno presentati i risultati preliminari di uno studio sistematico delle distribuzioni di energia spettrale (SED) di un campione statisticamente significativo di alcune centinaia di AGN (sia di tipo 1 che di tipo 2) selezionati dalla survey XMM-COSMOS. La vasta mole di dati disponibili sull'intero spettro elettromagnetico permette di calcolare le SED medie per diversi intervalli di redshift e luminosita'. Una stima affidabile della SED e' di fondamentale importanza per il calcolo della luminosita' bolometrica e quindi per lo studio della fisica dei processi di accrescimento su SMBH, per la loro evoluzione con il tempo cosmico.

  12. Elevated temperature testing of Mir 1 cooperative solar array photovoltaic panel module

    SciTech Connect

    Chau, M.T.; Brisco, H.N.

    1995-12-31

    The Mir 1 Cooperative Solar Array project supplies the Russians, Rocket Space Corporation-Energia (RSC-E) with US photovoltaic panel modules (PPMs) based on the International Space Station Alpha`s (ISSA) solar array technology developed by Lockheed Missiles and Space Company, Inc. (LMSC). The PPMs are integrated into the Russian module frame assemblies (MFA) and deployment mechanisms, and will replace solar arrays on the current Mir 1 Station. The replacement solar arrays will generate 6.5 kW beginning of life power (BOL). This paper documents LMSC`s effort in the diagnosis of the PPMs` performance degradation after completion of the development tests at RSC-E.

  13. Results of in-flight operation of scientific payload on micro-satellite “Kolibri-2000”

    NASA Astrophysics Data System (ADS)

    Klimov, Stanislav I.; Afanasyev, Yuri V.; Eismont, Natan A.; Grachev, Egor A.; Grigoryan, Oleg R.; Grushin, Valery A.; Lysakov, Dmitri S.; Nozdrachev, Mikhail N.

    2005-01-01

    The realization of Russian-Australian scientific—educational micro-satellite "Kolibri-2000" (weight of 20.5 kg, http://www.kolibri2000.ru 20 March, 2002), delivered into an orbit by "Progress M1-7", was the first item in the Program of Scientific—Educational Micro-Satellite (PSEMS' 2002-2007, http://iki.cosmos.ru/kollibri/mission1_e.htm) and designate the starting point of a series at perspective scientific—educational micro-satellites (SEMS, http://www.energia.ru/english/energia/sci-education/microsat/microsat-02.html). In the "Kolibri-2000" project, several schools equipped by School Center of Reception of the Information (SCRI), participated, including Russian schools (Obninsk http://ftschool.obninsk.org) and two Australian schools in Sydney, Knox Grammar School ( www.knox.nsw.edu.au) and Ravenswood School for Girls ( www.ravenswood.nsw.edu.au). The results of the "Kolibri-2000" first measurements on the orbit near the International Space Station will be submitted in this paper which include the ionosphere reaction during the April 2002 events, and address as understanding of the coupling and feedback in the Sun-Earth interaction.

  14. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., technicians with DaimlerChrysler Aerospace and RSC Energia of Korolev, Russia, maneuver a Russian cargo crane, the Strela, which is to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). The Strehla has been the focus for two Shuttle crews, STS-96 who are at KSC for a Crew Equipment Interface Test, and STS-101, for payload familiarization. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Russian cargo crane; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler Aerospace and RSC Energia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  15. Neutrino-driven wakefield plasma accelerator

    NASA Astrophysics Data System (ADS)

    Rios, L. A.; Serbeto, A.

    2003-08-01

    Processos envolvendo neutrinos são importantes em uma grande variedade de fenômenos astrofísicos, como as explosões de supernovas. Estes objetos, assim como os pulsares e as galáxias starburst, têm sido propostos como aceleradores cósmicos de partículas de altas energias. Neste trabalho, um modelo clássico de fluidos é utilizado para estudar a interação não-linear entre um feixe de neutrinos e um plasma não-colisional relativístico de pósitrons e elétrons na presença de um campo magnético. Durante a interação, uma onda híbrida superior de grande amplitude é excitada. Para parâmetros típicos de supernovas, verificamos que partículas carregadas "capturadas" por essa onda podem ser aceleradas a altas energias. Este resultado pode ser importante no estudo de mecanismos aceleradores de partículas em ambientes astrofísicos.

  16. STS-84 oxygen generator for Mir on display at SPACEHAB

    NASA Technical Reports Server (NTRS)

    1997-01-01

    Representatives of RSC Energia in Russia and other onlookers in the SPACEHAB Payload Processing Facility examine an oxygen generator which the Space Shuttle Atlantis will carry to the Russian Mir Space Station on Mission STS-84. Sergei Romanov, second from right in the white shirt, is the spokesperson for generator manufacturer RSC Energia. The nearly 300-pound generator will be strapped down on the inside surface of a SPACEHAB Double Module for the trip to Mir. It will replace one of two Mir units that have been malfunctioning recently. The generator functions by electrolysis, which separates water into its oxygen and hydrogen components. The hydrogen is vented and the oxygen is used for breathing by the Mir crew. The generator is 4.2 feet in length and 1.4 feet in diameter. STS-84, which is planned to include a Mir crew exchange of astronaut C. Michael Foale for Jerry M. Linenger, is targeted for a May 15 liftoff. It will be the sixth Shuttle-Mir docking.

  17. KSC-97pc654

    NASA Image and Video Library

    1997-04-16

    Representatives of RSC Energia in Russia and other onlookers in the SPACEHAB Payload Processing Facility examine an oxygen generator which the Space Shuttle Atlantis will carry to the Russian Mir Space Station on Mission STS-84. Sergei Romanov, second from right in the white shirt, is the spokesperson for generator manufacturer RSC Energia. The nearly 300-pound generator will be strapped down on the inside surface of a SPACEHAB Double Module for the trip to Mir. It will replace one of two Mir units that have been malfunctioning recently. The generator functions by electrolysis, which separates water into its oxygen and hydrogen components. The hydrogen is vented and the oxygen is used for breathing by the Mir crew. The generator is 4.2 feet in length and 1.4 feet in diameter. STS-84, which is planned to include a Mir crew exchange of astronaut C. Michael Foale for Jerry M. Linenger, is targeted for a May 15 liftoff. It will be the sixth Shuttle-Mir docking

  18. Overview of International Space Station orbital environments exposure flight experiments

    NASA Astrophysics Data System (ADS)

    Soares, Carlos E.; Mikatarian, Ronald R.; Schmidl, Danny; Finckenor, Miria; Neish, Michael; Imagawa, Kichiro; Dinguirard, Magdeleine; van Eesbeek, Marc; Naumov, S. F.; Krylov, A. N.; Mishina, L. V.; Gerasimov, Y. I.; Sokolova, S. P.; Kurilyonok, A. O.; Alexandrov, N. G.; Smirnova, T. N.

    2004-10-01

    This paper presents an overview of International Space Station (ISS) on-orbit environments exposure flight experiments. International teams are flying, or preparing to fly, externally mounted materials exposure trays and sensor packages. The samples in these trays are exposed to a combination of induced molecular contamination, ultraviolet radiation, atomic oxygen, ionizing radiation, micrometeoroids and orbital debris. Exposed materials samples are analyzed upon return. Typical analyses performed on these samples include optical property measurements, X-ray photo spectroscopy (XPS) depth profiles, scanning electron microscope (SEM) surface morphology and materials properties measurements. The objective of these studies is to characterize the long-term effects of the natural and induced environments on spacecraft materials. Ongoing flight experiments include the U.S. Materials International Space Station Experiment (MISSE) program, the Japanese Micro-Particles Capturer and Space Environment Exposure Device (SM/MPAC&SEED) experiment, the Russian SKK and Kromka experiments from RSC-Energia, and the Komplast flight experiment. Flight experiments being prepared for flight, or in development stage, include the Japanese Space Environment Data Acquisition Attached Payload (SEDA-AP), the Russian BKDO monitoring package from RSC-Energia, and the European Materials Exposure and Degradation Experiment (MEDET). Results from these ISS flight experiments will be crucial to extending the performance and life of long-duration space systems such as Space Station, Space Transportation System, and other missions for Moon and Mars exploration.

  19. Market assessment of PFBC ash use

    SciTech Connect

    Bland, A. E.; Brown, T. H., Western Research Institute

    1998-01-01

    Pressurized fluidized bed combustion (PFBC) of coal is undergoing demonstration in the United States, as well as throughout the world. American Electric Power`s (AEP`s) bubbling PFBC 70 MWe Tidd demonstration program in Ohio and pilot-scale development at Foster Wheeler Energia Oy 10 MWth circulating PFBC at Karhula, Finland, have demonstrated the advantages of PFBC technology. Further technology development in the US is planned with the deployment of the technology at the MacIntosh Clean Coal project in Lakeland, Florida. Development of uses for solid wastes from PFBC coal-fired power systems is being actively pursued as part of the demonstration of PFBC technologies. Ashes collected from Foster Wheeler Energia Oy pilot circulating PFBC tests in Karhula, Finland, operating on (1) low sulfur subbituminous and (2) high sulfur bituminous coal; and ash from the AEP`s high-sulfur bituminous coal-fired bubbling PFBC in Brilliant, Ohio, were evaluated in laboratory and pilot-scale ash use testing at Western Research Institute (WRI).

  20. A Dynamical Study of the Formation of Peculiar Galaxies

    NASA Astrophysics Data System (ADS)

    Chatterjee, T. K.

    1990-11-01

    RESUMEN. Un estudlo de la formaci6n de diferentes tipos de galaxias peculiares (interactuantes) es conducido en base de la dina'mioa de la colisi6n lievando a su formaci6n usando la aproximaci6n impulsiva. Los resultados indican la existencia de una relaci6n caracteristica en base del camblo de la energia interna durante la colisi6n, cual determina el tipo de la galaxia peculiar formado. La relacion es analisada y valores criticos del camblo de Ia energia interna, ilevando a la interacci6n entre galaxias de varias intensidades y la formaci6n consecuente de varios tipos de sistemas peculiares es discutido. ABSTRACT. A study of the formation of different types of peculiar (interacting) galaxies is conducted based on the dynamics of the collision leading to their formation, using the impulsive approximation. Results indicate the existance of a characteristic relationship, based on the internal energy changes during the collision, governing the type of peculiar galaxy formed. The relationship is analysed and critical values of internal energy changes, leading to galaxy interaction of varying intensities and consequent formation of different types of peculiar galaxies is discussed. Key words: GALAXIES-DYNAMICS -- GALAXIES-FORMATION

  1. KSC-99pp0349

    NASA Image and Video Library

    1999-03-25

    At Astrotech in Titusville, Fla., technicians with DaimlerChrysler Aerospace and RSC Energia of Korolev, Russia, maneuver a Russian cargo crane, the Strela, which is to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). The Strehla has been the focus for two Shuttle crews, STS-96 who are at KSC for a Crew Equipment Interface Test, and STS-101, for payload familiarization. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Russian cargo crane; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler Aerospace and RSC Energia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999

  2. Retrieval of Mir Solar Array

    NASA Technical Reports Server (NTRS)

    Rutledge, Sharon K.; deGroh, Kim K.

    1999-01-01

    A Russian solar array panel removed in November 1997 from the non-articulating photovoltaic array on the Mir core module was returned to Earth on STS-89 in January 1998. The panel had been exposed to low Earth orbit (LEO) for 10 years prior to retrieval. The retrieval provided a unique opportunity to study the effects of the LEO environment on a functional solar array. To take advantage of this opportunity, a team composed of members from RSC-Energia (Russia), the Boeing Company, and the following NASA Centers--Johnson Space Center, Kennedy Space Center, Langley Research Center, Marshall Space Flight Center, and Lewis Research Center--was put together to analyze the array. After post-retrieval inspections at the Spacehab Facility at Kennedy in Florida, the array was shipped to Lewis in Cleveland for electrical performance tests, closeup photodocumentation, and removal of selected solar cells and blanket material. With approval from RSC-Energia, five cell pairs and their accompanying blanket and mesh material, and samples of painted handrail materials were selected for removal on the basis of their ability to provide degradation information. Sites were selected that provided different sizes and shapes of micrometeoroid impacts and different levels of surface contamination. These materials were then distributed among the team for round robin testing.

  3. Enterprise: an International Commercial Space Station Option

    NASA Astrophysics Data System (ADS)

    Lounge, John M.

    2002-01-01

    In December 1999, the U.S. aerospace company SPACEHAB, Inc., (SPACEHAB) and the Russian aerospace company Rocket and Space Corporation Energia (RSC-Energia), initiated a joint project to establish a commercial venture on the International Space Station (ISS). The approach of this venture is to use private capital to build and attach a commercial habitable module (the "Enterprise Module") to the Russian Segment of the ISS. The module will become an element of the Russian Segment; in return, exclusive rights to use this module for commercial business will be granted to its developers. The Enterprise Module has been designed as a multipurpose module that can provide research accommodation, stowage and crew support services. Recent NASA budget decisions have resulted in the cancellation of NASA's ISS habitation module, a significant delay in its new ISS crew return vehicle, and a mandate to stabilize the ISS program. These constraints limit the ISS crew size to three people and result in very little time available for ISS research support. Since research activity is the primary reason this Space Station is being built, the ISS program must find a way to support a robust international research program as soon as possible. The time is right for a commercial initiative incorporating the Enterprise Module, outfitted with life support systems, and commercially procured Soyuz vehicles to provide the capability to increase ISS crew size to six by the end of 2005.

  4. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., technicians with DaimlerChrysler Aerospace and RSC Energia of Korolev, Russia, maneuver a Russian cargo crane, the Strela, which is to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). The Strehla has been the focus for two Shuttle crews, STS-96 who are at KSC for a Crew Equipment Interface Test, and STS-101, for payload familiarization. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Russian cargo crane; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler Aerospace and RSC Energia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  5. STS-84 oxygen generator for Mir on display at SPACEHAB

    NASA Technical Reports Server (NTRS)

    1997-01-01

    Representatives of RSC Energia in Russia and other onlookers in the SPACEHAB Payload Processing Facility examine an oxygen generator which the Space Shuttle Atlantis will carry to the Russian Mir Space Station on Mission STS-84. Sergei Romanov, second from right in the white shirt, is the spokesperson for generator manufacturer RSC Energia. The nearly 300-pound generator will be strapped down on the inside surface of a SPACEHAB Double Module for the trip to Mir. It will replace one of two Mir units that have been malfunctioning recently. The generator functions by electrolysis, which separates water into its oxygen and hydrogen components. The hydrogen is vented and the oxygen is used for breathing by the Mir crew. The generator is 4.2 feet in length and 1.4 feet in diameter. STS-84, which is planned to include a Mir crew exchange of astronaut C. Michael Foale for Jerry M. Linenger, is targeted for a May 15 liftoff. It will be the sixth Shuttle-Mir docking.

  6. Fotometría de imágenes CCD insuficientemente muestreadas

    NASA Astrophysics Data System (ADS)

    Ostrov, P. G.

    Se enfrenta el problema de la fotometría de imágenes CCD con una escala inadecuada (fwhm menor o igual que el tamaño de un pixel) y psf fuertemente variable con la posición. Se analiza, en particular, la aplicabilidad de una táctica propuesta por Massey, consistente en eliminar las vecinas débiles (utilizando una psf rudimentaria) para luego efectuar una fotometría de apertura sobre las estrellas brillantes. Se determina, mediante experimentos numéricos, la precisión alcanzada mediante esta técnica.

  7. [Psychosis as debut of antiphospholipid syndrome].

    PubMed

    del Rio-Casanova, Lucía; Paz-Silva, Eduardo; Requena-Caballero, Ignacio; Diaz-Llenderrozas, Francisco; Gomez-Trigo Baldominos, Jesús; de la Cruz-Davila, Alberto; Paramo-Fernandez, Mario

    2014-06-01

    Introduccion. El sindrome antifosfolipido (SAF) es un trastorno autoinmune que determina un estado de hipercoagulabilidad caracterizado por eventos tromboticos, abortos de repeticion y la presencia de anticuerpos antifosfolipido. Puede presentarse de manera aislada (SAF primario) o asociado a lupus eritematoso sistemico u otras enfermedades autoinmunes (SAF secundario). Las manifestaciones neuropsiquiatricas del SAF incluyen jaqueca, epilepsia, corea, demencia y psicosis. Se realiza una revision bibliografica de la sintomatologia neuropsiquiatrica en general y psicotica en particular de los pacientes afectos de SAF. Caso clinico. Mujer de 23 años afecta de un SAF primario que comenzo con manifestaciones clinicas unicamente neuropsiquiatricas consistentes en sintomatologia psicotica (dos episodios de clinica delirante) y movimientos anormales coreiformes y hemibalisticos que inicialmente se interpretaron como clinica conversiva. Conclusiones. Se discute la patogenesis de la sintomatologia motora y psicotica. La etiologia de los sintomas neuropsiquiatricos todavia no se conoce con claridad, pero la trombosis de pequeños vasos en el cerebro podria explicar parte de los sintomas. Asimismo, se revisa el papel que la medicacion antipsicotica y antitrombotica tiene para estos pacientes. En la actualidad, nuestra paciente se mantiene asintomatica sin necesidad de terapia antipsicotica y recibe tratamiento unicamente con un agente antiagregante y otro antipaludico.

  8. [Candidemia epidemiology in Córdoba Argentina. Surveillance study of five institutions].

    PubMed

    Riera, F; Medeot, M; Sartori, L; Bergallo, C; Minoli, J; Vilchez, V; Sánchez, P; Abiega, C; Pincheira, C; Correa, S; Bartoli, C; Figueroa, M; Montamat, M; Spitale, N; Minguez, A; Caeiro, J P

    2014-01-01

    La incidencia de infecciones invasivas por Candida ha aumentado en forma dramática en los últimos 20 años, siendo causa importante de mortalidad en torno al 40% en los pacientes hospitalizados. Material y métodos: Se realizó un estudio retrospectivo, basado en reportes de laboratorio de cinco hospitales de tercer nivel de la ciudad de Córdoba entre enero de 2010 y agosto de 2012, con el objetivo de conocer la epidemiología regional. Resultados: 158 pacientes con candidemia, edad promedio de 55.8 años, el 60% internados en unidades de cuidados intensivos. Candida albicans 44%, Candida parapsilosis 22% y Candida tropicalis 12% fueron las principales especies aisladas. Candida parapsilosis estuvo comúnmente asociada a infecciones relacionadas a catéteres. Conclusiones: Esta serie local de la ciudad de Córdoba muestra que C. albicans, C. parapsilosis y C. tropicalis son las especies mas frecuentes coincidente con el perfil de las series publicadas en Argentina y Latinoamérica. Esto puede tener implicancias para decidir que agente antifúngico usar empíricamente para tratar las candidemias.

  9. Nonlinear Propagation of Mag Waves Through the Transition Region

    NASA Astrophysics Data System (ADS)

    Jatenco-Pereira, V.; Steinolfson, R. S.; Mahajan, S.; Tajima, T.

    1990-11-01

    RESUMEN. Una onda de gravitaci5n magneto acustica (GMA), se inicia en el regimen de alta beta cerca de la basa de fot5sfera solar y es segui- da, usando simulaciones numericas, mientras viaja radialmente a traves de la cromosfera, la regi5n de transici6n y dentro de la corona. Se ha' seleccionado parametros iniciales de manera que la beta resulte menor que uno cerca de la parte alta de la regi6n de transici6n. Nuestro interes maximo se concentra en la cantidad y forma del flujo de energia que puede ser llevada por la onda hasta la corona dados una atm6sfera inicial y amplitud de onda especificas. Segun los estudios a la fecha, el flujo de energ1a termico domina, aumentando linealmente con la ampli tud deonda y resulta de aproximadamente i05 ergs/cm2-s en una amplitud de 0.5. El flujo de energia cinetica siempre permanece despreciable, mientras que el flujo de energia magnetica depende de la orientaci5n inicial del campo. Un modo GMA rapido y casi paralelo, el cual es esen- cialmente un modo MHD en la corona se convierte a un modo rapido modificado y a uno lento, cuando la beta atmosferica disminuye a uno. ABSTRACT: A magneto-acoustic-gravity (MAG) wave is initiated in the high-beta regime near the base of the solar photosphere and followed, using numerical siriiulations, as it travels radially through the chromosphere, the transition region, and into the corona. Initial parameters are selected such that beta becomes less than one near the top of the transition region. Our primary interest is in the amount and form of energy flux that can be carried by the wave train into the corona for a specified initial atmosphere and wave amplitude. For the studies conducted to date, the thermal energy flux dominates, it about linearly with wave amplitude and becomes approximately 10 ergs/cm2-s at an amplitude of 0.5. The kinetic energy flux always remains negligible, while the magnetic energy flux depends on the inLtial field orientation. A nearly parallel fast MAG mode, which

  10. Excitação e fotoabsorção de moléculas interestelares no ultra violeta

    NASA Astrophysics Data System (ADS)

    Rodrigues, A. M. F.; Boechat-Roberty, H. M.; Souza, G. B.; Turci, C. C.

    2003-08-01

    O estudo dos processos de excitação, fotoabsorção e ionização molecular nas nuvens interestelar, permite a análise dos processos químicos, como a formação e destruição de moléculas, até mesmo daquelas que dão origem à vida. Acredita-se que as moléculas como CS2, NH3, CO2 e N2O estão presentes nas nuvens onde são formadas as estrelas e seus sistemas planetários. Estas moléculas são congeladas na superfície de objetos densos, como aqueles encontrados na Nuvem de Oort do nosso Sistema Solar. Quando esses objetos (cometas) desprendem-se dessa região, aproximam-se do Sol, sofrem a interação da radição Ultra Violeta (UV), passam à fase gasosa e são bombardeados por íons e elétrons presentes nos ventos solares. Obtivemos os espectros de fotoabsorção do CS2, NH3 e N2O na faixa do UV, convertendo espectros de Perda de Energia de Elétrons, medidos no menor ângulo de espalhamento e na energia de impacto de 1000 eV. Destes espectros determinamos os valores de força de oscilador (f) e de seção de choque absolutas na faixa de 500 a 2000 Å. Para tal, estudamos e comparamos dois diferentes métodos de conversão. Neste trabalho também geramos muitos dados moleculares como, valores absolutos de seção de choque elástica em função do ângulo de espalhamento e a distribuição de força do oscilador generalizada (df/dE) em função da energia de excitação para diversos ângulos de espalhamento. Comparando nossos espectros de fotoabsorção com o espectro da atmosfera de Júpiter, obtido pelo Telescópio Espacial Hubble, logo após o impacto do cometa Shoemaker-Levy 9, confirmamos a presença do CS2 e da amônia.

  11. Propriedades de estruturas temporais rápidas submilimétricas durante uma grande explosão solar

    NASA Astrophysics Data System (ADS)

    Raulin, J.-P.; Kaufmann, P.; Gimenez de Castro, C. G.; Pacini, A. A.; Makhmutov, V.; Levato, H.; Rovira, M.

    2003-08-01

    Apresentamos novas propriedades de variações rápidas da emissão submilimétrica durante uma das maiores explosões solares do ciclo solar 23. Os dados analisados neste estudo foram obtidos com o Telescópio Solar Submilimétrico (SST), que observa o Sol em 212 GHz e 405 GHz, e comparados com emissões em Raios-X duros e Raios-gama (fótons de energia > 10 MeV), que foram obtidas pelo experimento GRS do Yohkoh. Aplicamos diferentes metodologias para detectar e caracterizar, ao longo do evento, os pulsos submilimétricos (duração de 50-300 ms) detectados acima de uma componente mais lenta (alguns minutos). Os resultados mostram que durante a fase impulsiva, num instante próximo ao tempo do máximo do evento, houve um aumento da ocorrência de maiores e de mais rápidas estruturas temporais. Também identificamos uma boa correlação com as emissões em raios-X e raios-gama (até a faixa de energia 10-100 MeV), indicando que os pulsos rápidos submilimétricos refletiram injeções primárias de energia durante o evento.O espectro do fluxo desses pulsos é crescente com a freqüência entre 212 and 405 GHz, na maioria dos casos, ao contrário do observado para a componente gradual. As posições calculadas para as estruturas rápidas são discretas, compactas e localizadas em toda a área da região ativa, o que é previsto nos modelos de explosões solares decorrentes de instabilidades múltiplas em diferentes pequenas regiões. Por outro lado, a posição calculada para a componente lenta é estável durante a fase impulsiva. Assim, a comparação entre as características do espectro de fluxo e da localização da emissão, para os pulsos rápidos e para a componente gradual, sugere que as respectivas emissões são de natureza diferente.

  12. Cobertura desarrollada de Puerto Rico

    Treesearch

    William A. Gould; Sebastian Martinuzzi; Olga M. Ramos Gonzalez

    2008-01-01

    Este mapa representa la cobertura desarrollada en Puerto Rico (Martinuzzi et al. 2007). Cobertura desarrollada se define aqui como areas urbanas, construidas y sin vegetacion, que resultan de actividad humana. Tipicamente, estas incluyen estructuras construidas, concreto, asfalto, u otra infraestructura. La cobertura desarrollada se creo mediante el analisis de...

  13. Revisión de tecnología y riesgos: refinerías de petróleo - Hoja informativa para las comunidades

    EPA Pesticide Factsheets

    La Agencia de Protección Ambiental (EPA, por sus siglas en inglés) emitió un reglamento final que mejorará significativamente la calidad del aire en los vecindarios cercanos a las refinerías de petróleo mediante un control más exhaustivo de las emisiones a

  14. Normas finales de desempeño para fuentes nuevas y revisión de tecnología y riesgos del sector de refinería de petróleo-resumen de cambios

    EPA Pesticide Factsheets

    La Agencia de Protección Ambiental (EPA, por sus siglas en inglés) emitió un reglamento final que mejorará significativamente la calidad del aire en los vecindarios cercanos a las refinerías de petróleo mediante un control más exhaustivo de las emisiones a

  15. Unidades del paisaje de Puerto Rico: la influencia del clima, el substrato y la topografia

    Treesearch

    William Gould; Michael E. Jimenez; Gary Potts; Maya Quinones; Sebastian Martinuzzi

    2008-01-01

    El mapa de unidades del paisaje de Puerto Rico representa variaciones climaticas, topograficas y del substrato mediante la integracion de seis zonas climaticas (Ewel y Whitmore, 1973), seis substratos (Bawiec, 2001; USGS, 2005), cinco posiciones topograficas, o topoformas (Martinuzzi et al. 2007), y cuerpos de agua (USGS 2005). Los substratos representan el conjunto...

  16. Using Supervised Learning Techniques for Diagnosis of Dynamic Systems

    DTIC Science & Technology

    2002-05-04

    Sisteinas Dinmicos: hacia una Caracterizaci6n correct behaviour. In those cases the fault is not detected. Other en el Nivel de Conocimiento . In proceedings...Rodriguez, Carlos J. Alonso y Q. Isaac Moro. Clasificaci6n de patrones temporales en sistemas dinimicos mediante Boosting y Alineamiento dinamico

  17. Thirty years together: A chronology of U.S.-Soviet space cooperation

    NASA Technical Reports Server (NTRS)

    Portree, David S. F.

    1993-01-01

    The chronology covers 30 years of cooperation between the U.S. and the Soviet Union (and its successor, the Commonwealth of Independent States, of which the Russian Federation is the leading space power). It tracks successful cooperative projects and failed attempts at space cooperation. Included are the Dryden-Blagonravov talks; the UN Space Treaties; the Apollo Soyuz Test Project; COSPAS-SARSAT; the abortive Shuttle-Salyut discussions; widespread calls for joint manned and unmanned exploration of Mars; conjectural plans to use Energia and other Russian space hardware in ambitious future joint missions; and contemporary plans involving the U.S. Shuttle, Russian Mir, and Soyuz-TM. The chronology also includes events not directly related to space cooperation to provide context. A bibliography lists works and individuals consulted in compiling the chronology, plus works not used but relevant to the topic of space cooperation.

  18. The Italian national survey of indoor radon exposure.

    PubMed

    Sciocchetti, G; Scacco, F; Baldassini, P G; Battella, C; Bovi, M; Monte, L

    1985-10-01

    An investigation is being developed by the Comitato Nazionale per la Ricerca e per lo Sviluppo dell'Energia Nucleare e delle Energie Alternative, ENEA, to assess the indoor exposure of the Italian population. The programme, which started in 1982, includes regional and local surveys in all the administrative districts and intensive investigations of factors which influence indoor radon levels. The survey is organized by statistical areas of sampling to obtain representative samples of houses. The definition of the areas takes into account basic parameters e.g. geolithological environments, radon soil gas from underlying soils and rocks, specific activities of local building materials, climatic and seasonal variations, building technology, types of houses and town planning. The collected data may also be used for the compilation of radon risk maps to plan special monitoring and remedial actions if needed. Preliminary results concerning the above items are discussed.

  19. BaBar superconducting coil: design, construction and test

    SciTech Connect

    Bell, R A; Berndt, M; Burgess, W; Craddock, W; Dormicchi, O; Fabbricatore, P; Farinon, S; Keller, L; Moreschi, P; Musenich, R; O'Connor, T G; Penco, R; Priano, C; Shen, S; Valente, P

    2001-01-26

    The BABAR Detector, located in the PEP-II B-Factory at the Stanford Linear Accelerator Center, includes a large 1.5 Tesla superconducting solenoid, 2.8 m bore and length 3.7 m. The two layer solenoid is wound with an aluminum stabilized conductor which is graded axially to produce a {+-} 3% field uniformity in the tracking region. This paper summarizes the 3 year design, fabrication and testing program of the superconducting solenoid. The work was carried out by an international collaboration between INFN, LLNL and SLAC. The coil was constructed by Ansaldo Energia. Critical current measurements of the superconducting strand, cable and conductor, cool-down, operation with the thermo-siphon cooling, fast and slow discharges, and magnetic forces are discussed in detail.

  20. Conceptos Basicos Sobre el Propano

    SciTech Connect

    2016-08-01

    El propano provee energia a mas de 143.000 vehiculos en los Estados Unidos y 23 millones en todo el mundo. Flotas de todos los Estados Unidos han implementado con exito el uso de vehiculos que funcionan con gas propano, y en la actualidad varios funcionan gracias a este gas, incluyendo autobuses escolares, lanzaderas y autobuses publicos, asi como tambien furgonetas, taxis, vehiculos utilizados por las fuerzas del orden, barredoras de calles y camiones para uso profesional. El propano tambien se utiliza con frecuencia en aplicaciones fuera de la carretera, tales como montacargas, podadoras y equipos de uso profesional y otros equipos agricolas. Las ventajas del propano incluyen la disponibilidad interna, su rendimiento y el hecho de que genera menos emisiones de gases contaminantes que otras alternativas energeticas.

  1. STS-112 Crew Interviews: Yurchikhin

    NASA Technical Reports Server (NTRS)

    2002-01-01

    A preflight interview with mission specialist Fyodor Yurchikhin is presented. He worked for a long time in Energia in the Russian Mission Control Center (MCC). Yurchikhin discusses the main goal of the STS-112 flight, which is to install the Integrated Truss Assembly S1 (Starboard Side Thermal Radiator Truss) on the International Space Station. He also talks about the three space walks required to install the S1. After the installation of S1, work with the bolts and cameras are performed. Yurchikhin is involved in working with nitrogen and ammonia jumpers. He expresses the complexity of his work, but says that he and the other crew members are ready for the challenge.

  2. Recommendations report for the platanares geothermal site, Department of Copan, Honduras. Reporte de recomendaciones para el sitio geotermico de platanares, Departamento de Copan, Honduras

    SciTech Connect

    Not Available

    1988-11-01

    A geothermal assessment of six previously identified sites in Honduras has been conducted by a team comprised of staff from the Los Alamos National Laboratory, the US Geological Survey, and the Empresa Nacional de Energia Electrica. The application of both reconnaissance and detailed scale techniques lead to the selection of Platanares in the Department of Copan as the highest potential site. Additional work resulted in the completion of a prefeasibility study at Platanares. We present here a tabulation of the work completed and short summaries of the results from these technical studies. We also present a brief model of the geothermal system and recommendations for additional feasibility work. Both English and Spanish versions of this report are provided in the same document. 18 figs., 5 tabs.

  3. Land-Use Change, Soil Process and Trace Gas Fluxes in the Brazilian Amazon Basin

    NASA Technical Reports Server (NTRS)

    Melillo, Jerry M.; Steudler, Paul A.

    1997-01-01

    We measured changes in key soil processes and the fluxes of CO2, CH4 and N2O associated with the conversion of tropical rainforest to pasture in Rondonia, a state in the southwest Amazon that has experienced rapid deforestation, primarily for cattle ranching, since the late 1970s. These measurements provide a comprehensive quantitative picture of the nature of surface soil element stocks, C and nutrient dynamics, and trace gas fluxes between soils and the atmosphere during the entire sequence of land-use change from the initial cutting and burning of native forest, through planting and establishment of pasture grass and ending with very old continuously-pastured land. All of our work is done in cooperation with Brazilian scientists at the Centro de Energia Nuclear na Agricultura (CENA) through an extant official bi-lateral agreement between the Marine Biological Laboratory and the University of Sao Paulo, CENA's parent institution.

  4. Final evaluation of USAID (US Agency for International Development) Alternative Energy Sources Project in Ecuador (Project No. 518-0029/Loan No. 518-W-039)

    SciTech Connect

    Maestas, G.; Jones, D.W.; Samuels, G. Jr.; Younger, D.R.

    1987-10-01

    This evaluation concentrated on reviewing the project's original purpose and design; modifications to the design over the project's life; the project's accomplishments and shortcomings; and the record of the project's implementation from the completion of the project's mid-term evaluation in April-May 1984 through June 1986. Goals were to encourage more rational use of energy resources in order to improve Ecuador's ability to meet the energy needs of its population (and) to better address the energy needs of lower income Ecuadorian families, particularly those in rural areas. To achieve these goals, the project was to strengthen INE's (the National Energy Institute, Instituto Nacional de Energia) institutional capacity to affect overall GOE (government of Ecuador) energy planning and the promotion of NCE (nonconventional energy) technologies appropriate to Ecuador.

  5. Electrical conductivity of a methane–air burning plasma under the action of weak electric fields

    NASA Astrophysics Data System (ADS)

    Colonna, G.; Pietanza, L. D.; D’Angola, A.; Laricchiuta, A.; Di Vita, A.

    2017-02-01

    This paper focuses on the calculation of the electrical conductivity of a methane–air flame in the presence of weak electric fields, solving the Boltzmann equation for free electrons self-consistently coupled with chemical kinetics. The chemical model GRI-Mech 3.0 has been completed with chemi-ionization reactions to model ionization in the absence of fields, and a database of cross sections for electron-impact-induced processes to account for reactions and transitions activated in the flame during discharge. The dependence of plasma properties on the frequency of an oscillating field has been studied under different pressure and gas temperature conditions. Fitting expressions of the electrical conductivity as a function of gas temperature and methane consumption are provided for different operational conditions in the Ansaldo Energia burner.

  6. KSC-97pc655

    NASA Image and Video Library

    1997-04-16

    An oxygen generator destined to replace a malfunctioning unit on the Russian Mir Space Station is the object of much curiosity during preflight preparations in the SPACEHAB Payload Processing Facility. A SPACEHAB Double Module on the Space Shuttle Atlantis will carry the oxygen generator to Mir during STS-84, the sixth Shuttle-Mir docking. The nearly 300-pound generator, manufactured by RSC Energia in Russia, will replace one of two Mir units that have been malfunctioning recently. The generator functions by electrolysis, which separates water into its oxygen and hydrogen components. The hydrogen is vented and the oxygen is used for breathing by the Mir crew. The generator is 4.2 feet in length and 1.4 feet in diameter. STS-84, which is planned to include a Mir crew exchange of astronaut C. Michael Foale for Jerry M. Linenger, is targeted for a May 15 liftoff

  7. Project 'VOLCANO': Electronics of tethered satellite system

    NASA Astrophysics Data System (ADS)

    Savich, N. A.

    The main goal of the 'VOLCANO' project developed jointly by the Institute of Radio Engineering and Electronics and space concern 'ENERGIA' is experimental investigation of the current-voltage characteristics of the 'Collector-Boom-Emitter' system simulating the long Tethered Satellite System (TSS) in the real space flight conditions on the transport ship 'PROGRESS'. These measurements will allow scientists to determine the attainable current values for different combinations of collectors and emitters (passive metallic sphere, thermocathode, hollow cathodes and show up some prospects of active TSS. The report is concerned with the concept, purpose and tasks of the project, the planned set up of the measurement equipment on the 'PROGRESS' ship and in the container extended on the deployable 100 m long boom end.

  8. External airlock assembly/Mir docking system being loaded

    NASA Image and Video Library

    1994-11-15

    S95-00057 (15 Nov 1994) --- In Rockwell's Building 290 at Downey, California, the external airlock assembly/Mir docking system is rotated into position for crating up for shipment to the Kennedy Space Center (KSC) in Florida. Jointly developed by Rockwell and RSC Energia, the external airlock assembly and Mir docking system will be mounted in the cargo bay of the Space Shuttle Atlantis to enable the shuttle to link up to Russia's Mir space station. The docking system contains hooks and latches compatible with the system currently housed on the Mir's Krystall module, to which Atlantis will attach for the first time next spring. STS-71 will carry two Russian cosmonauts, who will replace a three-man crew aboard Mir including Norman E. Thagard, a NASA astronaut. The combined 10-person crew will conduct almost five days of joint life sciences investigations both aboard Mir and in the Space Shuttle Atlantis's Spacelab module.

  9. Expedition 33 Prelaunch

    NASA Image and Video Library

    2012-10-23

    Expedition 33/34 crew members, NASA Astronaut and Flight Engineer Kevin Ford, front left, Russian Cosmonaut and Soyuz Commander Oleg Novitskiy, and Russian Cosmonaut and Flight Engineer Evgeny Tarelkin, back left, stop at the base of the Soyuz rocket for a formal farewell from President of the S.P. Korolev Rocket and Space Corporation Energia Vitaly Lopota, back right, General Director of the Russian Federal Space Agency, Roscosmos, Vladimir Popovkin, right center, and NASA Associate Administrator for Human Exploration and Operations William Gerstenmaier prior to the crews launch onboard a Soyuz TMA-06M spacecraft to the International Space Station, Tuesday, October 23, 2012, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Ford, Novitskiy and Tarelkin on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

  10. Evaluation of a solar intermittent refrigeration system for ice production operating with ammonia/lithium nitrate

    SciTech Connect

    Rivera, W.; Moreno-Quintanar, G.; Best, R.; Rivera, C.O.; Martinez, F.

    2011-01-15

    A novel solar intermittent refrigeration system for ice production developed in the Centro de Investigacion en Energia of the Universidad Nacional Autonoma de Mexico is presented. The system operates with the ammonia/lithium nitrate mixture. The system developed has a nominal capacity of 8 kg of ice/day. It consists of a cylindrical parabolic collector acting as generator-absorber. Evaporator temperatures as low as -11 C were obtained for several hours with solar coefficients of performance up to 0.08. It was found that the coefficient of performance increases with the increment of solar radiation and the solution concentration. A dependency of the coefficient of performance was not founded against the cooling water temperature. Also it was found that the maximum operating pressure increases meanwhile the generation temperature decreases with an increase of the solution concentration. (author)

  11. Experimental comparison between several photovoltaic panels, regarding the solar energy collection

    SciTech Connect

    Lorenzo, E.; Laspiur, A.; Molledo, A.G.; Romero, S.L.

    1984-05-01

    This paper summarizes the results of an experiment carried out at the Instituto de Energia Solar of the Universidad Politecnica de Madrid, whose main objective is the analysis of the energy collected by different kinds of photovoltaic panels. Special interest is paid to the study of bifacial flat panels and static concentrators using bifacial solar cells. Using the annual energy collected by a conventional static-monofacial flat panel as a basis for comparison, results show that static bifacial flat panels collect 60% more. The use of a two-axis tracking causes an increase of 40% and the combination of a bifacial flat panel with a two-axes tracking causes an increase of 80%. Finally, it is shown that the performance of static concentrators and monofacial flat panels is very similar.

  12. STS-84 oxygen generator for Mir on display at SPACEHAB

    NASA Technical Reports Server (NTRS)

    1997-01-01

    An oxygen generator destined to replace a malfunctioning unit on the Russian Mir Space Station is the object of much curiosity during preflight preparations in the SPACEHAB Payload Processing Facility. A SPACEHAB Double Module on the Space Shuttle Atlantis will carry the oxygen generator to Mir during STS-84, the sixth Shuttle-Mir docking. The nearly 300-pound generator, manufactured by RSC Energia in Russia, will replace one of two Mir units that have been malfunctioning recently. The generator functions by electrolysis, which separates water into its oxygen and hydrogen components. The hydrogen is vented and the oxygen is used for breathing by the Mir crew. The generator is 4.2 feet in length and 1.4 feet in diameter. STS-84, which is planned to include a Mir crew exchange of astronaut C. Michael Foale for Jerry M. Linenger, is targeted for a May 15 liftoff.

  13. STS-84 oxygen generator for Mir installation

    NASA Technical Reports Server (NTRS)

    1997-01-01

    In the SPACEHAB Payload Processing Facility, McDonnell Douglas- SPACEHAB technicians prepare a Russian-made oxygen generator for flight in a SPACEHAB Double Module. The oxygen generator, manufactured in Russia by RSC Energia, will be carried aboard the Space Shuttle Atlantis on Mission STS-84 for the Shuttles scheduled docking with the Russian Space Station Mir next month. The nearly 300-pound generator will replace one of two Mir units that have been malfunctioning recently. The generator functions by electrolysis, which separates water into its oxygen and hydrogen components. The hydrogen is vented and the oxygen is used for breathing by the Mir crew. The generator is 4.2 feet in length and 1.4 feet in diameter. STS-84, which is planned to include a Mir crew exchange of astronaut C. Michael Foale for Jerry M. Linenger, is targeted for a May 15 liftoff. It will be the sixth Shuttle-Mir docking.

  14. STS-112 Crew Interviews: Yurchikhin

    NASA Technical Reports Server (NTRS)

    2002-01-01

    A preflight interview with mission specialist Fyodor Yurchikhin is presented. He worked for a long time in Energia in the Russian Mission Control Center (MCC). Yurchikhin discusses the main goal of the STS-112 flight, which is to install the Integrated Truss Assembly S1 (Starboard Side Thermal Radiator Truss) on the International Space Station. He also talks about the three space walks required to install the S1. After the installation of S1, work with the bolts and cameras are performed. Yurchikhin is involved in working with nitrogen and ammonia jumpers. He expresses the complexity of his work, but says that he and the other crew members are ready for the challenge.

  15. A Rocket Powered Single-Stage-to-Orbit Launch Vehicle With U.S. and Soviet Engineers

    NASA Technical Reports Server (NTRS)

    MacConochie, Ian O.; Stnaley, Douglas O.

    1991-01-01

    A single-stage-to-orbit launch vehicle is used to assess the applicability of Soviet Energia high-pressure-hydrocarbon engine to advanced U.S. manned space transportation systems. Two of the Soviet engines are used with three Space Shuttle Main Engines. When applied to a baseline vehicle that utilized advanced hydrocarbon engines, the higher weight of the Soviet engines resulted in a 20 percent loss of payload capability and necessitated a change in the crew compartment size and location from mid-body to forebody in order to balance the vehicle. Various combinations of Soviet and Shuttle engines were evaluated for comparison purposes, including an all hydrogen system using all Space Shuttle Main Engines. Operational aspects of the baseline vehicle are also discussed. A new mass properties program entitles Weights and Moments of Inertia (WAMI) is used in the study.

  16. Seeking 'energy' vs. pain relief in spas in Brazil (Caldas da Imperatriz) and Portugal (Termas da Sulfurea).

    PubMed

    Quintela, Maria Manuel

    2011-04-01

    This paper is a comparative ethnography of the therapeutic practices at two different spa locations: Caldas da Imperatriz, SC, Brazil, and Termas da Sulfurea in Cabeco de Vide, Portugal. The comparison reveals the existence of contrasting 'explanatory models' held by the spa-goers as well as by the official medical systems. In the Portuguese context this model is highly medicalized; in the Brazilian case, spa treatments are viewed as 'alternative' or 'complementary' therapy and are also related to religious philosophies. Each model corresponds to a different idiom expressing certain experiences and world views, one focusing on 'pains' (dores) and the other on 'energy' (energia), the former leading to the rationale of 'curing', the latter to the notion of 'energizing'. In this paper the author intends to analyze and contrast the categories found in these models, which originate from different conceptions of health, illness and healing for Brazilian and Portuguese spa-goers.

  17. Space Station Freedom assembly and operation at a 51.6 degree inclination orbit

    NASA Technical Reports Server (NTRS)

    Troutman, Patrick A.; Brewer, Laura M.; Heck, Michael L.; Kumar, Renjith R.

    1993-01-01

    This study examines the implications of assembling and operating Space Station Freedom at a 51.6 degree inclination orbit utilizing an enhanced lift Space Shuttle. Freedom assembly is currently baselined at a 220 nautical mile high, 28.5 degree inclination orbit. Some of the reasons for increasing the orbital inclination are (1) increased ground coverage for Earth observations, (2) greater accessibility from Russian and other international launch sites, and (3) increased number of Assured Crew Return Vehicle (ACRV) landing sites. Previous studies have looked at assembling Freedom at a higher inclination using both medium and heavy lift expendable launch vehicles (such as Shuttle-C and Energia). The study assumes that the shuttle is used exclusively for delivering the station to orbit and that it can gain additional payload capability from design changes such as a lighter external tank that somewhat offsets the performance decrease that occurs when the shuttle is launched to a 51.6 degree inclination orbit.

  18. REVISS cobalt-60 production in Russia and beyond

    NASA Astrophysics Data System (ADS)

    Coppell, David; Latham, Ian; Nazarov, Michael

    2004-09-01

    Since Russian English Venture in Isotope Supply and Services (REVISS) Services is one of only two major global suppliers of sealed radiation sources to the industrial sterilization industry, security of supply of raw materials is understandably of primary concern to the users in the market place. This paper outlines the history, facilities and production capability of REVISS isotope suppliers, from MAYAK Production Association and Leningrad Nuclear Power Plant in Russia to Commission Nacional Energia Atomica in Argentina. The paper provides technical details of reactors and handling facilities used for fabrication of 60Co and 137Cs sources for industrial and research gamma irradiators and other applications. Other sources of 60Co in the world today will be reviewed briefly.

  19. Estimation of potential biomass resource and biogas production from aquatic plants in Argentina

    SciTech Connect

    Fitzsimons, R.E.; Laurino, C.N.; Vallejos, R.H.

    1982-01-01

    The Argentine government's Agua y Energia Electrica is planning to construct a hydroelectric power-generation facility on the middle Parana River, which is already heavily infested with aquatic weeds such as water hyacinth. These species will probably proliferate in the lakes that will be formed by the power project and perhaps seriously interfere with the facility. As a solution to this problem, Argentine biochemists propose mechanical harvesting and anaerobic fermentation of the aquatic plants to produce biogas and fertilizer. According to an evaluation of this potential resource, gross methane production could reach 37-153 billion CF (1.0-4.1 billion m/sup 3/)/yr, and the digested residue could provide 60,500-244,000 tons (54,900-221,400 metric tons)/yr of nitrogen, which represents 2-8 times Argentina's current nitrogen fertilizer demand.

  20. Geothermal resources assessed in Honduras

    SciTech Connect

    Not Available

    1986-01-01

    The investigation of the Platanares geothermal site is part of a joint Honduras (Empresa Nacional de Energia Electrica)/US (Los Alamos National Laboratory and US Geological Survey) assessment of the nationwide geothermal resource potential of Honduras. Platanares was selected as one of the initial sites for detailed study on the basis of previous geothermal reconnaissance work. The results of the geologic studies indicate that Platarnares' potential for development as an electrical power source is extremely good. This preliminary conclusion must be substantiated and refined through additional studies. Geophysical investigations are needed to further define the subsurface geology and fracture system. Several wells should be drilled to a depth of several hundred meters to measure thermal gradients. This will allow the calculation of the geothermal potential of the Platanares site and will indicate whether further development of the site is warranted.

  1. Energy and valuable material by-product from firing Estonian oil shale

    SciTech Connect

    Hanni, R.

    1996-12-31

    Power plants of Eesti Energia burn Estonian oil shale, known geologically as kukersite, to produce electrical and heat energy. The burnt shale, or oil shale ash, secondary product is collected and stored in increasing quantities. It is a high calcium content material with a low particle size range. Limited investment and international support have minimized development; however, some possibilities for the use of the ash have been found with consequent improvement to the environment. This paper describes different ways in which this burnt ash may be used. In particular, research has shown that it is most effective as an addition to Portland cement production. An Estonian Standard for the use of burnt shale in the production of rapid hardening portland cement and shale Portland cement has been developed. Characteristic data for burnt shale and burnt shale cellular concrete, collation of shale Portland cement and ordinary Portland cements are given.

  2. Recent geothermal investigations in Honduras: An overview

    NASA Astrophysics Data System (ADS)

    William Laughlin, A.; Goff, Sue J.

    1991-03-01

    Since 1985, the Los Alamos National Laboratory and the U.S. Geological Survey have worked with the Empresa Nacional de Energia Electrica of Honduras to perform a geothermal assessment of six areas in Honduras. A combination of reconnaissance and detailed techniques was used to eliminate from consideration the sites of lower potential. Detailed geophysical investigations were performed at two high-potential sites and three geothermal gradient coreholes were drilled at the highest potential site, Platanares. High-temperature fluids were encountered in two of these coreholes, while one hole was non-flowing. Evaluation of all the data collected suggests that there are two levels to the geothermal reservoir at Platanares. A shallow (< 700 m) level contains 160-165°C fluids while a deeper (> 1.2 km) reservoir at a temperature of 225° is indicated by fluid geothermometers.

  3. Italian IGCC project sets pace for new refining era

    SciTech Connect

    Del Bravo, R.; Starace, F.; Chellini, I.M.; Chiantore, P.V.

    1996-12-09

    A joint venture company, api Energia S.p.A., is starting construction of a 280 mw integrated gasification combined cycle plant (IGCC) that will generate electricity for the Italian grid and steam in a refinery on Italy` Adriatic coast. The refinery will supply the heavy residue for the gasifiers. This is one of the three IGCC plants planned for construction in Italy following the liberalization of the electricity production sector there and the introduction of specific government decrees that regulate the exchange and wheeling of electricity. By the year 2000, approximately 1,300 mw of electricity produced by heavy residues with IGCC will be put on the Italian grid. The paper describes the project, its sponsors plant configuration for gasification, the combined cycle power plant, auxiliary systems, the economics, and contracts.

  4. Comparison of the NIST and ENEA air kerma standards

    SciTech Connect

    Laitano, R.F.; Toni, M.P.; Lamperti, P.J.

    1998-07-01

    A comparison was made between the National Institute of Standards and Technology (NIST) and Ente per le Nuov Tecnologie l`Energia e l`Ambiente (ENEA) air kerma standards for medium energy x rays and {sup 60}Co gamma rays. The comparison took place at ENEA in June 1994. Two different transfer chambers from NIST were used for the comparison. The measurements were made at radiation qualities similar to those used at the Bureau International des Poids et Mesures (BIPM) (generating voltages of 100 kV, 135 kV, 180 kV and 250 kV, respectively) and with {sup 60}Co gamma radiation. The transfer chamber calibration factors obtained at the NIST and at the ENEA agreed with one another to 0.03% for {sup 60}Co gamma radiation and between 0.1% to 0.8% for the medium energy x-ray beam codes.

  5. Comparison of the NIST and ENEA Air Kerma Standards

    PubMed Central

    Laitano, R. F.; Lamperti, P. J.; Toni, M. P.

    1998-01-01

    A comparison was made between the National Institute of Standards and Technology (NIST) and Ente per le Nuove Tecnologie l’Energia e l’Ambiente (ENEA) air kerma standards for medium energy x rays and 60Co gamma rays. The comparison took place at ENEA in June 1994. Two different transfer chambers from NIST were used for the comparison. The measurements were made at radiation qualities similar to those used at the Bureau International des Poids et Mesures (BIPM) (generating voltages of 100 kV, 135 kV, 180 kV and 250 kV, respectively) and with 60Co gamma radiation. The transfer chamber calibration factors obtained at the NIST and at the ENEA agreed with one another to 0.03 % for 60Co gamma radiation and between 0.1 % to 0.8 % for the medium energy x-ray beam codes. PMID:28009356

  6. SPES-2, AP600 intergral system test S01007 2 inch CL to core make-up tank pressure balance line break

    SciTech Connect

    Bacchiani, M.; Medich, C.; Rigamonti, M.

    1995-09-01

    The SPES-2 is a full height, full pressure experimental test facility reproducing the Westinghouse AP600 reactor with a scaling factor of 1/395. The experimental plant, designed and operated by SIET in Piacenza, consists of a full simulation of the AP600 primary core cooling system including all the passive and active safety systems. In 1992, Westinghouse, in cooperation with ENEL (Ente Nazionale per l` Energia Elettrica), ENEA (Enter per le numove Technlogie, l` Energia e l` Ambient), Siet (Societa Informazioni Esperienze Termoidraulich) and ANSALDO developed an experimental program to test the integrated behaviour of the AP600 passive safety systems. The SPES-2 test matrix, concluded in November 1994, has examined the AP600 passive safety system response for a range of small break LOCAs at different locations on the primary system and on the passive system lines; single steam generator tube ruptures with passive and active safety systems and a main steam line break transient to demonstrate the boration capability of passive safety systems for rapid cooldown. Each of the tests has provided detailed experimental results for verification of the capability of the analysis methods to predict the integrated passive safety system behaviour. Cold and hot shakedown tests have been performed on the facility to check the characteristics of the plant before starting the experimental campaign. The paper first presents a description of the SPES-2 test facility then the main results of S01007 test {open_quotes}2{close_quotes} Cold Leg (CL) to Core Make-up Tank (CMT) pressure balance line break{close_quotes} are reported and compared with predictions performed using RELAP5/mod3/80 obtained by ANSALDO through agreement with U.S.N.R.C. (U.S. Nuclear Regulatory Commission). The SPES-2 nodalization and all the calculations here presented were performed by ANSALDO and sponsored by ENEL as a part of pre-test predictions for SPES-2.

  7. Energy efficiency as a commodity: The emergence of a secondary market for efficiency savings in commercial buildings

    SciTech Connect

    Kats, G.H.; Rosenfield, A.H.; McIntosh, T.A.; McGaraghan, S.A.

    1997-06-01

    The energy efficiency industry is constrained by lack of financing. For example, in the United States, commercial and public buildings need an investment of $100 billion for cost-effective retrofits with an average payback of about four years. But the current level of financing is stagnant at only about 34% of this level per year. The U.S. Department of Energy (DOE) has led the development of the North American Energy Measurement and Verification Protocol (NEMVP). This Protocol will increase the reliability and quality of estimated efficiency savings and improve realized savings. A critical element in the development of low cost financing and a secondary market--whether for homes or credit card debt--is the adoption of protocols to provide uniformity and reliability of the product. This is also true of energy efficiency installations, which have been characterized by inconsistency in the installation methodologies and, frequently, unreliability of savings. This Protocol, published in April 1996, is a DOE-led effort involving American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. ASHRAE, National Association of Energy Service Companies NAESCO, National Association of Regulatory Utility Commissioners NARUC, National Association of State Energy Officials NASEO, US Environmental Protection Agency EPA, Canada`s Canadian Association of Energy Service Companies CAESCO, and Mexico`s Comision Nacional Para El Ahorro De Energia CONAE and Fideicomiso De Apoyo Al Programa De Ahorro De Energia Del Sector Electrico FIDE. DOE has begun to build on this Protocol to develop new forms of lower-cost financing including, ultimately, development of a secondary market for energy efficiency. This could double financing for building energy efficiency within five years.

  8. Discriminação de núcleos primários no Observatório Auger

    NASA Astrophysics Data System (ADS)

    Tiba, A. K. O.; Medina Tanco, G. A.; Sciutto, S. J.

    2003-08-01

    A identidade das partículas, com energias E > 10EeV, que geram chuveiros atmosféricos extensivos (CAE) na atmosfera terrestre é um incógnita. Existem diferenças sutis, mas apreciáveis entre chuveiros gerados por fótons e por núcleos, como temos demonstrado em trabalho recente. Porém entre os núcleos, as diferenças são tão sutis, que a baixa estatística e incertezas experimentais têm limitado fortemente sua diferenciação até o presente. Tal discriminação precede qualquer aplicação astrofísica mas sofisticada de raios cósmicos de ultra-alta energia. Apresentamos aqui os resultados do desenvolvimento de novos métodos de diagnóstico para a análise de CAEs com aplicação específica ao Experimento Pierre Auger. Redes neurais, combinadas com simulações numéricas detalhadas de CAEs e dos dois tipos diferentes de detectores (Cherenkov em água e de fluorescência atmosférica) presentes no experimento são empregados na análise. Mostraremos a capacidade dos métodos de diagnóstico desenvolvidos, para a discriminação de diversas distribuições hipotéticas de massa-anergia.

  9. Stanford SsTO Mission to Mars: A Realistic, Safe and Cost Effective Approach to Human Mars Exploration Using the Stanford SsTO Launch System

    NASA Astrophysics Data System (ADS)

    Osborne, Robert D.

    1999-06-01

    In recent years, a lot of time and energy has been spent exploring possible mission scenarios for a human mission to Mars. NASA along with the privately funded Mars Society and a number of universities have come up with many options that could place people on the surface of Mars in a relatively short period of time at a relatively low cost. However, a common theme among all or at least most of these missions is that they require heavy lift vehicles such as the Russian Energia or the NASA proposed Magnum 100MT class vehicle to transport large payloads from the surface of Earth into a staging orbit about Earth. However, there is no current budget or any signs for a future budget to review the Russian Energia, the US made Saturn V, or to design and build a new heavy lift vehicle. However, there is a lot of interest and many companies looking into the possibility of "space planes". These vehicles will have the capability to place a payload into orbit without throwing any parts of the vehicle away. The concept of a space plane is basically that the plane is transported to a given altitude either by it's own power or on the back of another air worthy vehicle before the rocket engines are ignited. From this altitude, a Single Step to Orbit (SsTO) vehicle with a significant payload is possible. This report looks at the possibility of removing the requirement of a heavy lift vehicle by using the Stanford designed Single Step to Orbit.(SsTO) Launch Vehicle. The SsTO would eliminate the need for heavy lift vehicles and actually reduce the cost of the mission because of the very low costs involved with each SSTO launch. Although this scenario may add a small amount of risk assembling transfer vehicles in Earth orbit, it should add no additional risk to the crew.

  10. [Visual epileptic seizures. Signs and symptoms, and clinical implications].

    PubMed

    González-Cuevas, Montserrat; Toledo, Manuel; Santamarina, Estevo; Sueiras-Gil, María; Cambrodí-Masip, Roser; Sarria, Silvana; Quintana, Manuel; Salas-Puig, Javier

    2015-03-16

    Introduccion. Los fenomenos visuales pueden ser sintomas de crisis epilepticas, aunque con un significado clinico y una relacion con el foco epileptogeno incierto. Objetivo. Describir las implicaciones clinicas de las crisis epilepticas visuales segun su semiologia en adultos. Pacientes y metodos. Durante un año se recoge consecutivamente a pacientes que describian semiologia visual como manifestacion principal de sus crisis y se clasifican los sintomas visuales segun las caracteristicas de la descripcion. Resultados. Se incluye a 78 pacientes con una edad media de 43,5 años. El 97% de los casos eran epilepsias focales. Entre el 63% de las epilepsias sintomaticas, el 57% eran vasculares. Las crisis visuales eran, en un 81,9%, el aura previa a la crisis, y en un 17,9%, crisis visuales aisladas. La coexistencia de crisis visuales y otro tipo de crisis se asocio a farmacorresistencia (p = 0,021). Los sintomas visuales fueron: alucinaciones simples (55,1%), ilusiones (23,1%), alucinaciones complejas (15,4%) y perdida de vision (6,4%). La localizacion lobar de las lesiones era occipital (24,4%), temporoparietooccipital (21,8%), temporal (9%), parietal (3,8%) y frontal (1,3%). Las lesiones occipitales se asociaron con alucinaciones visuales simples (p < 0,001), y las ilusiones visuales y alucinaciones visuales complejas, con lesiones de la encrucijada temporoparietooccipital (p < 0,05). Del 55,1% de los pacientes con lesion unilateral en la resonancia magnetica, el 33% referia los sintomas en el hemicampo visual contralateral. Conclusiones. Las crisis visuales se presentan, principalmente, como auras epilepticas. Las alucinaciones simples se relacionan con el origen occipital, mientras que las alucinaciones complejas se asocian con regiones cerebrales mas anteriores. La aparicion de fenomenos visuales lateralizados nos orienta a un origen en el hemisferio contralateral.

  11. [Morgagni-Stewart-Morel syndrome. Case report and review of the literature].

    PubMed

    Gracia-Ramos, Abraham Edgar

    2016-01-01

    Introducción: La hiperostosis frontal interna (HFI) es un sobrecrecimiento óseo en la parte interna del hueso frontal. Dicha alteración puede ocurrir de forma aislada o acompañada de síntomas neuropsiquiátricos, manifestaciones metabólicas y endocrinológicas que en conjunto forman el síndrome de Morgagni-Stewart-Morel. A este respecto, se presenta el caso de una paciente que cumple criterios para tal síndrome y se realiza una revisión de la literatura médica con especial atención en su fisiopatología. Caso clínico: Mujer de 74 años con historia de exposición a humo de leña, vitíligo, diabetes mellitus tipo 2, hipertensión arterial sistémica y deterioro cognitivo, quien ingresa al hospital por malestar general, mareo, ansiedad, confusión, desorientación y dificultad para la marcha. Se realizaron estudios de imagen de cráneo donde se observó la presencia de hiperostosis frontal interna extensa, atrofia cortical y un infarto lacunar talámico izquierdo. Durante su estancia hospitalaria se documentó la presencia de obesidad grado I, hiperglucemia, hipertrigliceridemia e hiperuricemia. Conclusiones: La paciente cumplió con los criterios del síndrome de Morgagni-Stewart-Morel al manifestar la presencia de hiperostosis frontal interna con manifestaciones metabólicas, endocrinológicas y neuropsiquiátricas. El origen fisiopatológico del síndrome se desconoce, aunque se ha postulado que un desbalance endocrinológico motivado por factores genéticos y ambientales puede ser la causa.

  12. [Protocol for neurophysiological studies of the pelvic floor to appraise anorectal dysfunction in patients with multiple sclerosis].

    PubMed

    Álvarez-Guerrico, Ion; Royo, Inmaculada; Andreu, Montserrat; Roquer-González, Jaume; Munteis, Elvira

    2016-03-01

    Introduccion. Los pacientes con esclerosis multiple (EM) frecuentemente desarrollan disfuncion anorrectal. Las estructuras neuromusculares del suelo pelvico y los mecanismos de control voluntario de la defecacion pueden afectarse por las lesiones parcheadas de la EM o secundarias a la discapacidad del paciente. La implicacion multifactorial limita la comprension de la fisiopatologia de la disfuncion anorrectal en la EM. Tests neurofisiologicos especificos valoran la funcionalidad de los elementos del sistema nervioso central y periferico implicados en las disfunciones anorrectales. Objetivo. Proponer un protocolo diagnostico de estudios neurofisiologicos estandarizados del suelo pelvico para caracterizar la fisiopatologia de la disfuncion anorrectal en los pacientes con EM. Pacientes y metodos. Se realizaron estudios de electromiografia de esfinter anal externo, potenciales evocados somatosensoriales desde el nervio pudendo interno, registro de reflejos sacros anales y neurografia del nervio pudendo a 16 pacientes con EM definida y criterios de estreñimiento o incontinencia fecal. Resultados. Las caracteristicas clinicas y neurofisiologicas fueron heterogeneas. Nueve pacientes presentaron estreñimiento; dos, incontinencia fecal aislada; y cinco, combinacion de ambos. La abolicion o el retraso de la latencia de los potenciales evocados somatosensoriales fue el hallazgo mas frecuente (n = 12), seguido de la deteccion de contraccion paradojica (n = 11) y de reclutamiento deficitario (n = 8) en la electromiografia de esfinter anal externo. Conclusiones. La correcta interpretacion de cada test neurofisiologico disponible y la correlacion de los hallazgos en conjunto permiten comprender la fisiopatologia de la disfuncion anorrectal. La protocolizacion de estudios neurofisiologicos del suelo pelvico permite ajustar el diagnostico al identificar la lesion nerviosa, central o periferica, determinante de disfuncion anorrectal en los pacientes con EM.

  13. [Haemorrhagic pineal cysts: two clinical cases successfully treated by means of microsurgery].

    PubMed

    Arevalo, A; Pulido-Rivas, P; Gilo-Arrojo, F; Sola, R G

    2016-09-01

    Introduccion. Los quistes pineales son un hallazgo incidental relativamente frecuente en las pruebas de imagen; sin embargo, la apoplejia pineal se considera rara y se asocia a sintomas graves. Casos clinicos. Varon de 25 a˜os y mujer de 15 a˜os, que acudieron a urgencias con clinica de hipertension intracraneal; mediante pruebas de imagen se confirmo la existencia de una hemorragia pineal. Se les trato con exito mediante microcirugia. Conclusion. En nuestra experiencia, y avalado por la bibliografia, creemos que el mejor tratamiento de esta infrecuente patologia es el abordaje microquirurgico. Sin embargo, no se excluye la posibilidad de que, en un futuro, las tecnicas endoscopicas puedan tener un lugar importante en el tratamiento de la apoplejia pineal.

  14. [Prevalence of vitamin d deficiency and insuffiency and associated factors in pregnant women of northern Spain].

    PubMed

    Rodríguez-Dehli, Ana Cristina; Riaño Galán, Isolina; Fernández-Somoano, Ana; Navarrete-Muñoz, Eva María; Espada, Mercedes; Vioque, Jesús; Tardón, Adonina

    2015-04-01

    Introducción y objetivos: El déficit de vitamina D durante el embarazo se ha relacionado con sucesos adversos durante la gestación y con el desarrollo infantil postnatal. En este estudio examinamos los niveles plasmáticos de vitamina D [25(OH)D3] y los factores asociados a su deficiencia e insuficiencia plasmática en embarazadas del norte de España. Material y método: Se han analizado los datos de 453 gestantes participantes en la cohorte INMA-Asturias a las que se determinó la 25(OH)D3 mediante cromatografía líquida de alta resolución. Se ha estimado la ingesta dietética de vitamina D mediante un cuestionario de frecuencia alimentaria validado. Se han estimado las prevalencias de deficiencia [25(OH)D3.

  15. [Survival of patients with diffuse large B-cell lymphoma].

    PubMed

    Salas-Delgado, Arnoldo; Hernández-Pliego, Marco Antonio

    2014-01-01

    INTRODUCCIÓN: la quimioterapia actual ha incrementado la supervivencia total y la libre de recaída en los pacientes con linfoma no Hodgkin. Un recurso que permite hacer proyecciones al respecto es el Índice Pronóstico Internacional (IPI). El objetivo del presente análisis fue determinar la correspondencia entre el pronóstico determinado mediante ese índice y la supervivencia obtenida a dos años. MÉTODOS: estudio longitudinal, observacional y prospectivo. Se incluyeron pacientes diagnosticados y tratados durante un año que hubieran requerido hospitalización. Todos recibieron ciclofosfamida-doxorrubicina-vincristina- prednisona, y en algunos casos también rituximab; el seguimiento en promedio fue de 26 meses. La supervivencia se estimó mediante curvas de Kaplan-Meier.

  16. [Clinical characteristics of pediatric patients treated for influenza A (H1N1). The 2009 pandemic in Mexico].

    PubMed

    Fuentes-Pacheco, Yazmín Carmen; Flores-Ruiz, Eric Moisés; Solórzano-Santos, Fortino; Meza-Chávez, Abigail; Zamudio-Lugo, Irma; Vázquez-Rosales, José Guillermo; Miranda-Novales, María Guadalupe

    2014-01-01

    INTRODUCCIÓN: en abril de 2009 se informó por primera vez del virus pandémico de la influenza A H1N1. El objetivo del presente estudio es describir el curso clínico de los pacientes atendidos con enfermedad tipo influenza en un hospital pediátrico de tercer nivel. MÉTODOS: estudio transversal analítico que comprendió el periodo de abril de 2009 a marzo de 2010. La información clínica y demográfica se obtuvo de los expedientes clínicos. El análisis de los datos se llevó a cabo mediante estadística descriptiva e inferencial, para lo cual se aplicó análisis univariado mediante chi cuadrada, prueba exacta de Fisher y U de Mann-Whitney para las variables cuantitativas.

  17. Densidad de desarrollo alta y baja en Puerto Rico

    Treesearch

    William A. Gould; Sebastian Martinuzzi; Olga M. Ramos Gonzalez

    2008-01-01

    Este mapa demuestra la distribución de terrenos de alta y baja densidad de desarrollo urbano en Puerto Rico (Martinuzzi et al. 2007). El mapa fue creado mediante el analisis de un mosaico de imagenes de satelite Landsat ETM+ de los años 2000 – 2003. La clasificacion no supervisada ISODATA (“Iterative Self-Organizing Data Analysis Technique”) (ERDAS 2003) fue utilizada...

  18. A Multiagent Based Model for Tactical Planning

    DTIC Science & Technology

    2002-10-01

    Pub. Co. 1985. [10] Castillo, J.M. Aproximación mediante procedimientos de Inteligencia Artificial al planeamiento táctico. Doctoral Thesis...been developed under the same conceptual model and using similar Artificial Intelligence Tools. We use four different stimulus/response agents in...The conceptual model is built on base of the Agents theory. To implement the different agents we have used Artificial Intelligence techniques such

  19. The Changing Epidemiology of Infection in Burn Patients,

    DTIC Science & Technology

    1992-01-01

    immunosupresores sistdmicos 13. Bruck, H.M., Nash, G.. Foley, F.D., Pruitt, B.A. Jr.: Opportunis- de l leidntdrica ainfccin semanien coo l casa n~s...infecci6n, incluso, Ia 9.25:1134, 19851.Kim, S.H., Hubbard, G.B., Worley, B.L., McManus, W.F., Ma1- vigilancia programada mediante cultivos , Ia

  20. MACRONUTRIENT INTAKE IS CORRELATED WITH DYSLIPIDEMIA AND LOW-GRADE INFLAMMATION IN CHILDHOOD OBESITY BUT MOSTLY IN MALE OBESE.

    PubMed

    Antunes, Barbara de Moura Mello; Monteiro, Paula Alves; Silveira, Loreana Sanches; Brunholi, Claudia de Carvalho; Lira, Fábio Santos; Freitas Júnior, Ismael Forte

    2015-09-01

    Introducción y objetivo: la hipoxia causada por la hipertrofia de las células adiposas en la obesidad desencadena macrófagos de reclutamiento y la producción de citoquinas. Además, el alto consumo de ácidos grasos saturados (AGS) y las comidas con alto índice glucémico pueden contribuir al estrés oxidativo y la inflamación crónica de bajo grado por los aumentos de activación de NF-kB. Por lo tanto, el objetivo del estudio fue analizar la contribución de la ingesta de macronutrientes en el perfil metabólico e inflamatorio, por niveles de lipoproteínas, resistencia a la insulina, citoquinas anti y pro inflamatorias, en adolescentes obesos según el género. Métodos: la muestra estaba compuesta por 37 adolescentes, de ambos géneros, identificados como obesos según el índice de masa corporal (IMC). La composición corporal se evaluó mediante absorciometría de energía dual de rayos X (DEXA) y medidas de adiposidad intraabdominal (IAAT) y del tejido adiposo subcutáneo (SAT) se realizaron mediante ecografía. Los análisis bioquímicos se realizaron mediante la medición de citoquinas; los ácidos grasos y la insulina se realizaron por la técnica de ELISA. La estimación del consumo de macronutrientes fue llevado a cabo durante tres días mediante el registro de alimentos con respecto a la ingesta total. La significación estadística se estableció en el valor p.

  1. Introduzione al Laboratorio di Fisica

    NASA Astrophysics Data System (ADS)

    Ciullo, Giuseppe

    La Fisica (dal greco τὰ ϕυσικὰ: le cose naturali) si pone l'obiettivo di descrivere e prevedere il comportamento dei fenomeni naturali, nonché degli apparati e degli strumenti, che hanno reso e rendono la nostra vita più comoda ed efficiente. Tale obiettivo viene perseguito mediante un'attenta osservazione dei fenomeni, con una conseguente schematizzazione dell'osservazione, per fornire una conoscenza della realtà oggettiva, affidabile, verificabile e condivisibile.

  2. An Atlas of Original and Mercator-Transformed Satellite-Data Images of the Alboran Sea, August-October 1983,

    DTIC Science & Technology

    1985-08-01

    identifiable points on the coast. This was done on an HP-1000 computer using a "Navigation Subsystem" software and a library of "Ground Control Points" (GCP...European, Middle Eastern and N. African coastal ground control points for mapping satellite images, SACLANTCEN SM-170. La Spezia, Italy, SACLANT ASW...DETERMINATE L’UMIDITA’ RELATIVA E LA TEMPERATURA DI RUGIADA 0 DI BRINA MEDIANTE LO PSICROMETRO. AERONAUTICA MILITARE Italiana. Ispettorato delle

  3. Diseno de una matriz de soporte compuesta de colageno de piel de tiburon-aloe para ingenier a tisular (Design of Shark Skin Collagen-Aloe Composite Scaffold for Tissue Engineering)

    DTIC Science & Technology

    2008-01-01

    atmósfera de nitrógeno. Análisis de resistencia a la tracción Las matrices de soporte se sometieron a aná- lisis de carga-deformación mediante un sistema ...única18. La unidad estructural básica del tejido colagenoso no es la molécula sola sino una asociación ordenada de moléculas en forma de unión

  4. Observacion y anatisis de la varlacton de parametros geofisicos de un pozo ubicado en el piedemonte lIanero

    NASA Astrophysics Data System (ADS)

    Montano Mejia, Felix Humberto

    2001-12-01

    Este articulo presenta el desarrollo de instrumentacion especializada que se diseiio y se puso en funcionamiento con el fin de real izar la observacion y el anal isis de la variacion de parametres geofisicos de un pozo ubicado en el piedemonte llanero. La instrumentacion esta compuesta por una estacion remota para el registro multipararnetro y una estacion local en la cual se analizan los registros bajados de la estacion remota mediante la interrogacion periodica.

  5. Dynamic Analysis with Fibre Optic Sensors for Structural Health Monitoring

    DTIC Science & Technology

    2006-10-01

    Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be...ABSTRACT UU 18. NUMBER OF PAGES 24 19a. NAME OF RESPONSIBLE PERSON a. REPORT unclassified b. ABSTRACT unclassified c. THIS PAGE unclassified...Balis Crema, A. Castellani, A. Paolozzi, I. Peroni, “Identificazione Mediante Analisi Sperimentale di un Modello Dinamico di una Pala per Aerogeneratore

  6. Inter-methods agreement for the assessment of percentage of body fat between two laboratory methods in male adolescent cyclists.

    PubMed

    González-Agüero, Alejandro; Olmedillas, Hugo; Gómez-Cabello, Alba; Guillén-Ballester, Alexander; Casajús, José A; Vicente-Rodríguez, Germán

    2013-01-01

    Objetivo: Examinar la validez inter-métodos entre la absorciometría rayos X (DXA) y la pletismografía por desplazamiento de aire (PDA) en ciclistas varones adolescentes, para la evaluación del porcentaje de grasa corporal. Métodos: Se evaluó el porcentaje de grasa corporal de 24 ciclistas varones adolescentes mediante DXA y PDA. La validez inter-métodos se determinó mediante un gráfico de Bland-Altman; se calculó la diferencia intermétodo y los límites de concordancia mediante test t de Student. Se examinó también la heteroscedasticidad ente ambos métodos. Resultados: Los valores de porcentaje de grasa corporal obtenidos por el DXA fueron más elevados que los obtenidos por PDA, y el gráfico presentó heteroscedasticidad (ambos p < 0,05; r = 0,74). Conclusión: El DXA y la PDA no son métodos comparables para la evaluación del porcentaje de grasa en nuestra muestra de ciclistas varones adolescentes; esto debería ser tenido en cuenta a la hora de evaluar cambios longitudinales en esta determinada población.

  7. [Assessment of the effectiveness and safety of Sativex® in compassionate use].

    PubMed

    Cimas-Hernando, Icíar; Pato-Pato, Antonio; Lorenzo-González, José R; Rodríguez-Constenla, Iria

    2015-03-01

    Introduccion. Sativex ® es un farmaco aprobado para el tratamiento de la espasticidad en la esclerosis multiple. Hemos querido estudiar la tolerabilidad y eficacia de este farmaco en patologias fuera de indicacion de ficha tecnica, mediante su uso compasivo. Objetivo. Valorar la eficacia y tolerabilidad de Sativex en patologias no incluidas en la ficha tecnica, mediante un protocolo de uso compasivo. Pacientes y metodos. Se realizo un estudio observacional, de seis meses de duracion, para evaluar la eficacia y tolerabilidad de Sativex en el dolor neuropatico y en la espasticidad de causa diferente a la esclerosis multiple. Resultados. Se incluyo un total de 10 pacientes, seis mujeres y cuatro hombres. Solo hubo efectos adversos en dos de ellos, y el farmaco se suspendio en un caso. Tras el inicio del tratamiento con Sativex mediante protocolo de uso compasivo, el consumo de farmacos concomitantes se redujo un 34,2% (p = 0,004), y se suspendio la administracion de toxina botulinica en siete pacientes (70%). La mejoria de la escala de espasticidad de Ashworth fue del 65,6% (p = 0,004) y la escala visual analogica disminuyo su puntuacion un 49,2% (p = 0,026). Conclusion. Sativex puede ser una alternativa terapeutica interesante en pacientes con espasticidad y dolor cuando se han utilizado los tratamientos habituales disponibles, pero los pacientes continuan con afectacion significativa de su calidad de vida.

  8. [Return to work in patients with heart disease after cardiac rehabilitation].

    PubMed

    Huichan-Muñoz, Valeria; Justiniano-Cordero, Samuel; Solís-Hernández, José Luis; Rodríguez-Ábrego, Gabriela; Millán-Hernández, Edgar; Rojano-Mejía, David

    2016-01-01

    Introducción: en un estudio observacional, retrospectivo evaluamos la frecuencia, presentación clínica y tratamiento de linfocele en pacientes pediátricos con trasplante renal. Métodos: de enero de 2004 a enero de 2009 se realizaron 242 trasplantes renales, 197 de donantes vivos y 45 trasplantes de donantes cadavéricos. La técnica quirúrgica utilizada fue la habitual y la de los implantes uretrales fue la técnica Ricard modificada. El tratamiento fue por punción cutánea y drenajes internos mediante una ventana peritoneal laparoscópica. Resultados: se diagnosticaron siete pacientes con linfoceles (2.9 % con un IC 95 % 0.6-5.2 %). Una paciente del sexo femenino y seis del sexo masculino, todos fueron sometidos a drenajes por punción cutánea, seis pacientes fueron recidivados y tratados exitosamente por drenaje interno mediante una ventana peritoneal laparoscópica. Conclusiones: nuestra frecuencia es igual a la reportada en otros estudios (0.6-18 %). El drenaje interno mediante la ventana peritoneal laparoscópica parece ser lo más apropiado en pacientes pediátricos.

  9. [Lymphocele surgical treatment in pediatric kidney transplantation].

    PubMed

    Aurelus, Pierre Jean; Ortiz, Roberto Carlos; Rendón-Macías, Mario Enrique; Ortega-Rodríguez, Ma C; De la Cruz-Yañiz, Hermilo; Yamamoto-Nagano, Alfonso; Torres-Díaz, José Salustiano

    2016-01-01

    Introducción: en un estudio observacional, retrospectivo evaluamos la frecuencia, presentación clínica y tratamiento de linfocele en pacientes pediátricos con trasplante renal. Métodos: de enero de 2004 a enero de 2009 se realizaron 242 trasplantes renales, 197 de donantes vivos y 45 trasplantes de donantes cadavéricos. La técnica quirúrgica utilizada fue la habitual y la de los implantes uretrales fue la técnica Ricard modificada. El tratamiento fue por punción cutánea y drenajes internos mediante una ventana peritoneal laparoscópica. Resultados: se diagnosticaron siete pacientes con linfoceles (2.9 % con un IC 95 % 0.6-5.2 %). Una paciente del sexo femenino y seis del sexo masculino, todos fueron sometidos a drenajes por punción cutánea, seis pacientes fueron recidivados y tratados exitosamente por drenaje interno mediante una ventana peritoneal laparoscópica. Conclusiones: nuestra frecuencia es igual a la reportada en otros estudios (0.6-18 %). El drenaje interno mediante la ventana peritoneal laparoscópica parece ser lo más apropiado en pacientes pediátricos.

  10. [Hypothyroidism incidence and thyrotropin serum levels in newborns].

    PubMed

    Topete-González, Luz Rosalba; Ramirez-Garcia, Sergio Alberto; Macías-López, Griselda Guadalupe; Troyo-Sanromán, Rogelio; Ramos-Ramírez, Irma Mirella; Elizondo-Rueda, María Elizabeth Margarita; Dávalos-Rodríguez, Nory; González-Gamez, Jaime Guillermo; Cabrera-Pivaral, Carlos Enrique

    2013-01-01

    Introducción: el hipotiroidismo congénito ocupa el tercer lugar de las enfermedades hereditarias subclínicas en México. Los neonatos con hipofunción total o parcial de la glándula tiroides presentan concentraciones altas de la tirotropina, lo que permite identificar los casos probables con riesgo para desarrollar hipotiroidismo mediante las pruebas de tamiz. El objetivo de esta investigación fue determinar la incidencia de hipotiroidismo congénito neonatal en los recién nacidos y establecer el valor de corte en el ensayo de la prueba de tamiz. Métodos: se procesaron 4049 muestras de sangre de cordón umbilical de recién nacidos. Se cuantificó la hormona estimulante de la tiroides mediante ELISA. A los niños con valores elevados se les realizó la prueba confirmatoria mediante ensayo inmunoenzimático de micropartículas. Resultados: se identificó una incidencia de hipotiroidismo de 1.2 por cada 1000 recién nacidos. El valor de corte para la hormona estimulante de la tiroides fue de 26.63 mUI/L en la prueba de tamiz. Conclusiones: los valores de la hormona estimulante de la tiroides mostraron una distribución diferente a los de otras investigaciones en población mexicana, así como una incidencia más elevada de hipotiroidismo.

  11. Resultados do desenvolvimento de um propulsor à plasma no Brasil

    NASA Astrophysics Data System (ADS)

    Ferreira, I. S.; Ferreira, J. L.

    2003-08-01

    Uma das partes mais importantes de um satélite é o controle de atitude do mesmo. E se tratando de um satélite científico, a atenção para este sistema deve ser redobrada. Uma possibilidade atraente para executar esta tarefa é a propulsão elétrica. Aqui, mostraremos resultados obtidos pelo propulsor à plasma PHALL-01, desenvolvido na Universidade de Brasília entre 2000 e 2003. Este é derivado do propulsor russo SPT-100 (Stationary Plasma Thruster), mas com o emprego inovador de um arranjo de imãs permanentes como fonte do campo magnético, este último o agente da aceleração do plasma. Esta alteração foi motivada pelo objetivo de que o mesmo operasse com o mínimo de potência elétrica. A partir da formulação teórica do mecanismo de aceleração, tendo como base as equações da magnetohidrodinâmica, pode-se obter vínculos sob os quais o propulsor pudesse ser construído. O mais forte destes é o que dita a topologia do campo magnético. Sendo assim, foram realizadas simulações computacionais, que definiram a geometria do propulsor. Após construído, este foi diagnosticado usando-se sondas de Langmuir e analisadores de energia. Como resultados, obtivemos a distribuição espacial da temperatura, densidade e potencial do plasma, bem como a distribuição angular do feixe produzido pelo mesmo em vários regimes de operação. O espectro de energia do feixe de plasma também foi medido, indicando íons de até 560eV. Combinando estes resultados, calculou-se o empuxo do propulsor: 84mN; e o impulso específico: 1083s. Estes demonstram que o mesmo estará qualificado, num futuro próximo, para o emprego no controle de atitude de satélites científicos, ou até mesmo como parte do conjunto propulsor primário, responsáveis pela transferência de órbitas.

  12. Aerodynamics of Reentry Vehicle Clipper at Descent Phase

    NASA Astrophysics Data System (ADS)

    Semenov, Yu. P.; Reshetin, A. G.; Dyadkin, A. A.; Petrov, N. K.; Simakova, T. V.; Tokarev, V. A.

    2005-02-01

    From Gagarin spacecraft to reusable orbiter Buran, RSC Energia has traveled a long way in the search for the most optimal and, which is no less important, the most reliable spacecraft for manned space flight. During the forty years of space exploration, in cooperation with a broad base of subcontractors, a number of problems have been solved which assure a safe long stay in space. Vostok and Voskhod spacecraft were replaced with Soyuz supporting a crew of three. During missions to a space station, it provides crew rescue capability in case of a space station emergency at all times (the spacecraft life is 200 days).The latest modification of Soyuz spacecraft -Soyuz TMA -in contrast to its predecessors, allows to become a space flight participant to a person of virtually any anthropometric parameters with a mass of 50 to 95 kg capable of withstanding up to 6 g load during descent. At present, Soyuz TMA spacecraft are the state-of-the-art, reliable and only means of the ISS crew delivery, in-flight support and return. Introduced on the basis of many years of experience in operation of manned spacecraft were not only the principles of deep redundancy of on-board systems and equipment, but, to assure the main task of the spacecraft -the crew return to Earth -the principles of functional redundancy. That is, vital operations can be performed by different systems based on different physical principles. The emergency escape system that was developed is the only one in the world that provides crew rescue in case of LV failure at any phase in its flight. Several generations of space stations that have been developed have broadened, virtually beyond all limits, capabilities of man in space. The docking system developed at RSC Energia allowed not only to dock spacecraft in space, but also to construct in orbit various complex space systems. These include large space stations, and may include in the future the in-orbit construction of systems for the exploration of the Moon and

  13. Radiation Testing of a Low Voltage Silicone Nuclear Power Plant Cable.

    SciTech Connect

    White II, Gregory Von; Schroeder, John Lee.; Sawyer, Patricia Sue.; Wichhart, Derek; Mata, Guillermo Adrian; Zorrilla, Jorge; Bernstein, Robert

    2014-09-01

    This report summarizes the results generated in FY13 for cable insulation in support of the Department of Energy's Light Water Reactor Sustainability (LWRS) Program, in collaboration with the US-Argentine Binational Energy Working Group (BEWG). A silicone (SiR) cable, which was stored in benign conditions for %7E30 years, was obtained from Comision Nacional de Energia Atomica (CNEA) in Argentina with the approval of NA-SA (Nucleoelectrica Argentina Sociedad Anonima). Physical property testing was performed on the as-received cable. This cable was artificially aged to assess behavior with additional analysis. SNL observed appreciable tensile elongation values for all cable insulations received, indicative of good mechanical performance. Of particular note, the work presented here provides correlations between measured tensile elongation and other physical properties that may be potentially leveraged as a form of condition monitoring (CM) for actual service cables. It is recognized at this point that the polymer aging community is still lacking the number and types of field returned materials that are desired, but Sandia National Laboratories (SNL) -- along with the help of others -- is continuing to work towards that goal. This work is an initial study that should be complimented with location-mapping of environmental conditions of Argentinean plant conditions (dose and temperature) as well as retrieval, analysis, and comparison with in- service cables.

  14. Radiation Testing of a Low Voltage Silicone Nuclear Power Plant Cable.

    SciTech Connect

    Bernstein, Robert

    2014-08-01

    This report summarizes the results generated in FY13 for cable insulation in support of DOE's Light Water Reactor Sustainability (LWRS) Program, in collaboration with the US- Argentine Binational Energy Working Group (BEWG). A silicone (SiR) cable, which was stored in benign conditions for %7E30 years, was obtained from Comision Nacional de Energia Atomica (CNEA) in Argentina. Physical property testing was performed on the as-received cable. This cable was artificially aged to assess behavior with additional analysis. SNL observed appreciable tensile elongation values for all cable insulations received, indicative of good mechanical performance. Of particular note, the work presented here provides correlations between measured tensile elongation and other physical properties that may be potentially leveraged as a form of condition monitoring (CM) for actual service cables. It is recognized at this point that the polymer aging community is still lacking the number and types of field returned materials that are desired, but SNL -- along with the help of others -- is continuing to work towards that goal. This work is an initial study that should be complimented with location- mapping of environmental conditions of CNEA plant conditions (dose and temperature) as well as retrieval, analysis, and comparison with in-service cables.

  15. Joint U.S./Brazilian hybrid power system (wind-PV-diesel) on Marajo Island

    SciTech Connect

    Leboeuf, C.; Taylor, R.W.; Corbus, D.; Moszkowicz, M.; Lima, J.; Ribeiro, C.

    1995-09-01

    A cooperative renewable energy project is underway between the U.S. Department of Energy (through the National Renewable Energy Laboratory, NREL), and the Federal Republic of Brazil (through the Centro de Pesquisas de Energia Eletrica, CEPEL). The objectives of this joint US/Brazilian program are to establish technical, institutional, and economic confidence in using renewable energy systems to meet the needs of the people of rural Brazil, to build ongoing partnerships beneficial to both countries, and to demonstrate the potential for large-scale rural electrification through the use of renewable energy systems. Phase 1 of this program resulted in the deployment of more than 700 photovoltaic (PV) electric lighting systems in the Brazilian states of Pernambuco and Ceara. Phase 2 of the program extends the pilot project into six additional Brazilian states and demonstrates a wider variety of stand-alone end uses, including the use of wind electric power generation for selected sites and applications. Additionally, Phase 2 also includes the development of two hybrid village power systems, including one comprising PV, wind, battery, and diesel power sources. This paper focuses on this hybrid system, which is located in the Amazon River delta.

  16. Independent Review of U.S. and Russian Probabilistic Risk Assessments for the International Space Station Mini Research Module #2 Micrometeoroid and Orbital Debris Risk

    NASA Technical Reports Server (NTRS)

    Squire, Michael D.

    2011-01-01

    The Mini-Research Module-2 (MRM-2), a Russian module on the International Space Station, does not meet its requirements for micrometeoroid and orbital debris probability of no penetration (PNP). To document this condition, the primary Russian Federal Space Agency ISS contractor, S.P. Korolev Rocket and Space Corporation-Energia (RSC-E), submitted an ISS non-compliance report (NCR) which was presented at the 5R Stage Operations Readiness Review (SORR) in October 2009. In the NCR, RSC-E argued for waiving the PNP requirement based on several factors, one of which was the risk of catastrophic failure was acceptably low at 1 in 11,100. However, NASA independently performed an assessment of the catastrophic risk resulting in a value of 1 in 1380 and believed that the risk at that level was unacceptable. The NASA Engineering and Safety Center was requested to evaluate the two competing catastrophic risk values and determine which was more accurate. This document contains the outcome of the assessment.

  17. Testing and linearity calibration of films of phenol compounds exposed to thermal neutron field for EPR dosimetry.

    PubMed

    Gallo, S; Panzeca, S; Longo, A; Altieri, S; Bentivoglio, A; Dondi, D; Marconi, R P; Protti, N; Zeffiro, A; Marrale, M

    2015-12-01

    This paper reports the preliminary results obtained by Electron Paramagnetic Resonance (EPR) measurements on films of IRGANOX® 1076 phenols with and without low content (5% by weight) of gadolinium oxide (Gd2O3) exposed in the thermal column of the Triga Mark II reactor of LENA (Laboratorio Energia Nucleare Applicata) of Pavia (Italy). Thanks to their size, the phenolic films here presented are good devices for the dosimetry of beams with high dose gradient and which require accurate knowledge of the precise dose delivered. The dependence of EPR signal as function of neutron dose was investigated in the fluence range between 10(11) cm(-2) and 10(14) cm(-2). Linearity of EPR response was found and the signal was compared with that of commercial alanine films. Our analysis showed that gadolinium oxide (5% by weight) can enhance the thermal neutron sensitivity more than 18 times. Irradiated dosimetric films of phenolic compound exhibited EPR signal fading of about 4% after 10 days from irradiation. Copyright © 2015 Elsevier Ltd. All rights reserved.

  18. Results from a contamination experiment on the ISS

    NASA Astrophysics Data System (ADS)

    Friedrich, Peter; Predehl, Peter; Meidinger, Norbert; Strüder, Lothar; Vongehr, Monika; Burkert, Wolfgang; Freyberg, Michael; Hartner, Gisela; Bräuninger, Heinrich; Hasinger, Günther; Hofer, Stefan; Stuffler, Timo; Hagl, Franz; Hollerith, Christian

    2005-08-01

    While investigating the feasibility of the accommodation of X-ray instrumentations on the International Space Station (ISS) a major question remained still open, i.e. the unknown extent of degradation of X-ray mirror surfaces and X-ray detector material caused by contamination in the ISS environment. Therefore, a sample expose experiment has been started in 2001 to investigate these effects in detail using the Russian expose facility provided by the Russian space industry company RKK Energia. While Kayser-Threde GmbH was responsible to organize and coordinate the experiment, gold-coated Zerodur and silicon samples have been provided by the Max-Planck-Institute (MPE). In total 5 samples were flown with the expose facility and have been exposed to the ISS environment for a total duration of 756 days. The analyses of 4 of them are presented in this paper. X-ray reflection measurements before and after the experiment at MPE's PANTER X-ray test facility and microscopy inspections revealed a thin structured surface layer which reduced the X-ray reflection of the exposed mirror samples dramatically. In addition, the samples have been analyzed with a scanning electron microscope, an energy dispersive X-ray spectrometer, and electron spectroscopy for chemical analysis. The results of all these measurements revealing the degradation of the X-ray mirrors and polished silicon detector surfaces are presented.

  19. New Flight Opportunities Outside the Russian ISS Segment: Universal Working Platform URM-D

    NASA Astrophysics Data System (ADS)

    Hofmann, P.; Griethe, W.; Lebedev, O.; Panchenkov, V.; Silenchikov, M.

    2002-01-01

    As an important step to start the commercial utilization of the International Space Station, direct access by means of an external payload platform on the Russian segment is provided. Kayser-Threde has negotiated an agreement with the Russian Space Agency Rosaviakosmos and its Russian joint venture partner RSC Energia to jointly build a multi-purpose platform. During the first stage a total of three payloads can be mounted to the platform. This exciting experimental possibility will be available as early as at the end of 2003. The first industrial contract has been signed with the German Aerospace Center DLR at the end of November. Technology experiments involving a state-of-the-art light weight robot arm will be performed. The robot can be controlled directly from earth (i.e. from DLR's control center in Oberpfaffenhofen near Munich). Apart from robot technology demonstration a telepresence mode is foreseen mimicking in-orbit repair actions. Public outreach experiments (e.g. earth observation) are planned, too, using cameras mounted on top of the robot. The multi-purpose platform is characterized as follows:

  20. Photovoltaic generating systems in rural schools in Neuquen Province, Argentina

    SciTech Connect

    Lawand, T.A.; Campbell, J.

    1997-12-01

    During the period 1994-95, solar photovoltaic systems were installed at a number of schools in Neuquen Province, Argentina, by the Provincial electric utility, Ente Provincial de Energia del Neuquen. This was undertaken with funds provided by the Inter-American Development Bank. In all, there are 12 schools that have had photovoltaic generating systems installed. These generating systems are designed to provide electricity for the basic needs at the schools: primarily for lighting, and to operate small electrical appliances such as communication radios, televisions, VCR`s, AM/FM and short-wave radios. They do not provide enough energy to operate large consumption appliances such as washing machines, microwaves, refrigerators, power tools, etc. The program of provision of PV systems was supplemented with training on simple systems for cooking food or drying fruit, etc. These techniques are primarily intended for demonstration at the schools thus serving an educational role with the hope that they will be transmitted in time to the families of the students where the need is manifested the most.

  1. International Space Station USOS Waste and Hygiene Compartment Development

    NASA Technical Reports Server (NTRS)

    Link, Dwight E., Jr.; Broyan, James Lee, Jr.; Gelmis, Karen; Philistine, Cynthia; Balistreri, Steven

    2007-01-01

    The International Space Station (ISS) currently provides human waste collection and hygiene facilities in the Russian Segment Service Module (SM) which supports a three person crew. Additional hardware is planned for the United States Operational Segment (USOS) to support expansion of the crew to six person capability. The additional hardware will be integrated in an ISS standard equipment rack structure that was planned to be installed in the Node 3 element; however, the ISS Program Office recently directed implementation of the rack, or Waste and Hygiene Compartment (WHC), into the U.S. Laboratory element to provide early operational capability. In this configuration, preserved urine from the WHC waste collection system can be processed by the Urine Processor Assembly (UPA) in either the U.S. Lab or Node 3 to recover water for crew consumption or oxygen production. The human waste collection hardware is derived from the Service Module system and is provided by RSC-Energia. This paper describes the concepts, design, and integration of the WHC waste collection hardware into the USOS including integration with U.S. Lab and Node 3 systems.

  2. Fabrication and testing of U–7Mo monolithic plate fuel with Zircaloy cladding

    DOE PAGES

    Pasqualini, E. E.; Robinson, A. B.; Porter, D. L.; ...

    2016-07-15

    The Materials Management and Minimization program is developing fuel designs to replace highly enriched fuel with fuels of low enrichment. In the most challenging cases, U–(7–10wt%)Mo monolithic plate fuel are proposed. The chosen design includes aluminum-alloy cladding, which provides some challenges in fabrication and fuel/cladding interaction in service. We investigated zircaloy cladding, specifically Zry–4as an alternative cladding, and development of a fabrication method was performed by researchers with the Comisión Nacionalde Energia Atómica (CNEA) in Argentina, resulting in test fuel plates (Zry–4 clad U–7Mo) which were subsequently tested in the Advanced Test Reactor in Idaho. Because Zry–4 and U–(7–10)Mo havemore » similar high-temperature mechanical properties, fabrication was simplified in that the fuel foil and cladding could be co-rolled and bonded. The challenge was to prevent a thermal-expansion mismatch which could destroy the fuel/cladding bond before complete bonding was achieved; the solution was to prevent the composites from cooling significantly between roll passes. Our final product performed very well in-reactor, showing good bonding, very little fuel/cladding interaction, either from fabrication or in-reactor testing, and little swelling, especially no detectable heterogeneous bubble formation at the fuel/cladding interface tested to a fission density of up to 2.54E+21« less

  3. Fabrication and testing of U–7Mo monolithic plate fuel with Zircaloy cladding

    SciTech Connect

    Pasqualini, E. E.; Robinson, A. B.; Porter, D. L.; Wachs, D. M.; Finlay, M. R.

    2016-07-15

    The Materials Management and Minimization program is developing fuel designs to replace highly enriched fuel with fuels of low enrichment. In the most challenging cases, U–(7–10wt%)Mo monolithic plate fuel are proposed. The chosen design includes aluminum-alloy cladding, which provides some challenges in fabrication and fuel/cladding interaction in service. We investigated zircaloy cladding, specifically Zry–4as an alternative cladding, and development of a fabrication method was performed by researchers with the Comisión Nacionalde Energia Atómica (CNEA) in Argentina, resulting in test fuel plates (Zry–4 clad U–7Mo) which were subsequently tested in the Advanced Test Reactor in Idaho. Because Zry–4 and U–(7–10)Mo have similar high-temperature mechanical properties, fabrication was simplified in that the fuel foil and cladding could be co-rolled and bonded. The challenge was to prevent a thermal-expansion mismatch which could destroy the fuel/cladding bond before complete bonding was achieved; the solution was to prevent the composites from cooling significantly between roll passes. Our final product performed very well in-reactor, showing good bonding, very little fuel/cladding interaction, either from fabrication or in-reactor testing, and little swelling, especially no detectable heterogeneous bubble formation at the fuel/cladding interface tested to a fission density of up to 2.54E+21

  4. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Two Shuttle crews take part in familiarization activities at Astrotech in Titusville, Fla. From left are STS-96 Mission Specialists Daniel T. Barry and Tamara E. Jernigan, and Pilot Rick Douglas Husband; plus STS-101 Mission Specialists Edward Tsang Lu and Jeffrey N. Williams. They are looking at components of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler Aerospace of Bremen and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  5. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., members of two Shuttle crews look at components of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). From left are STS-96 Mission Specialist Julie Payette and Daniel T. Barry, Commander Kent V. Rominger and Mission Specialist Tamara E. Jernigan; three technicians from DaimlerChrysler Aerospace; (in the background, facing right) STS-101 Commander James Donald Halsell Jr.; STS-101 Mission Specialists Yuri Ivanovich Malenchenko, with the Russian Space Agency, and Edward Tsang Lu; and two more technicians from DaimlerChrysler. Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  6. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., members of two Shuttle crews take a close look at a component of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). From left, they are STS-101 Mission Specialist Edward Tsang Lu, plus STS-96 Mission Specialist Julie Payette and Pilot Rick Douglas Husband. Payette represents the Canadian Space Agency. Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  7. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., members of two Shuttle crews take a close look at components of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). From left are STS-96 Mission Specialists Daniel T. Barry and Tamara E. Jernigan, Pilot Rick Douglas Husband, and Mission Specialist Julie Payette; next to them is STS-101 Mission Specialist Yuri Ivanovich Malenchenko, with the Russian Space Agency. Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  8. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., STS-96 Mission Specialists Tamara E. Jernigan and Daniel T. Barry take turns working with a Russian cargo crane, the Strela, which is to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). Technicians around the table observe. The STS-96 crew is taking part in a Crew Equipment Interface Test. Other members participating are Commander Kent V. Rominger, Pilot Rick Douglas Husband, and Mission Specialists Julie Payette, with the Canadian Space Agency, and Valery Ivanovich Tokarev, with the Russian Space Agency. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Russian cargo crane; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler Aerospace and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  9. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., members of two Shuttle crews get a close look at components of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). At left are STS-96 Mission Specialist Daniel T. Barry and Pilot Rick Douglas Husband. At center, STS-96 Mission Specialist Tamara E. Jernigan gives her attention to a technician with DaimlerChrysler while STS-101 Mission Specialist Edward Tsang Lu looks on. Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  10. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., STS-96 Mission Speciaists Daniel T. Barry (left), Julie Payette (center, with camera), and Tamara E. Jernigan (right, pointing) get a close look at one of the payloads on their upcoming mission. Other crew members are Commander Kent V. Rominger, and Mission Specialists Ellen Ochoa and Valery Ivanovich Tokarev, with the Russian Space Agency. Payette is with the Canadian Space Agency. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS); the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  11. Investigating the ionosphere response to exhaust products of ``Progress'' cargo spacecraft engines on the basis of Irkutsk Incoherent Scatter Radar data

    NASA Astrophysics Data System (ADS)

    Shpynev, Boris; Alsatkin, Sergei; Khakhinov, Vitaliy; Lebedev, Valentin

    2017-04-01

    The FSUE Central Research Institute of Machine Building (TsNIIMash), Rocket and Space Corporation "Energia", and Institute of Solar-Terrestrial Physics of Siberian Branch of Russian Academy of Sciences (ISTP SB RAS) jointly conducted the active space experiment "Radar-Progress" in 2007-2015. During this experiment, we used the Irkutsk Incoherent Scatter Ra-dar to study space-time characteristics of ionospheric disturbances generated by exhaust products of "Progress" cargo spacecraft engines. As the basic effect during exhaust product injection we consider the formation of new centers for recombination of ambient ionospheric ions O+ on molecules of water and carbon dioxide. This produces an ionization "hole" in the region of injection. In nighttime conditions when the majority of experiments were performed, this hole was filled by hydrogen ions from the plasmasphere, thus the ion composition in the vicinity of the hole and incoherent scatter spectra were changed. For successful obser-vation of the ionization hole dynamics, the critical fac-tors are the degree of radar antenna diagram filling by exhaust products and the velocity of the thermospheric neutral wind, which makes exhaust gases move from the antenna diagram. These two factors lead to poor repeatability of successful experiments. Successful experiments recorded a decrease in electron density up to 35 % in the hole that existed for 30 min. The lifetime of the region with high concentration of H+ ions can be as long as one hour.

  12. Science Data Report for the Optical Properties Monitor (OPM) Experiment

    NASA Technical Reports Server (NTRS)

    Wilkes, D. R.; Zwiener, J. M.; Carruth, Ralph (Technical Monitor)

    2001-01-01

    This science data report describes the Optical Properties Monitor (OPM) experiment and the data gathered during its 9-mo exposure on the Mir space station. Three independent optical instruments made up OPM: an integrating sphere spectral reflectometer, vacuum ultraviolet spectrometer, and a total integrated scatter instrument. Selected materials were exposed to the low-Earth orbit, and their performance monitored in situ by the OPM instruments. Coinvestigators from four NASA Centers, five International Space Station contractors, one university, two Department of Defense organizations, and the Russian space company, Energia, contributed samples to this experiment. These materials included a number of thermal control coatings, optical materials, polymeric films, nanocomposites, and other state-of-the-art materials. Degradation of some materials, including aluminum conversion coatings and Beta cloth, was greater than expected. The OPM experiment was launched aboard the Space Shuttle on mission STS-81 in January 1997 and transferred to the Mir space station. An extravehicular activity (EVA) was performed in April 1997 to attach the OPM experiment to the outside of the Mir/Shuttle Docking Module for space environment exposure. OPM was retrieved during an EVA in January 1998 and was returned to Earth on board the Space Shuttle on mission STS-89.

  13. Scientometric indicators for Brazilian research on High Energy Physics, 1983-2013.

    PubMed

    Alvarez, Gonzalo R; Vanz, Samile A S; Barbosa, Marcia C

    2017-06-29

    This article presents an analysis of Brazilian research on High Energy Physics (HEP) indexed by Web of Science (WoS) from 1983 to 2013. Scientometric indicators for output, collaboration and impact were used to characterize the field under study. The results show that the Brazilian articles account for 3% of total HEP research worldwide and that the sharp rise in the scientific activity between 2009 and 2013 may have resulted from the consolidation of graduate programs, the increase of the funding and of the international collaboration as well as the implementation of the Rede Nacional de Física de Altas Energias (RENAFAE) in 2008. Our results also indicate that the collaboration patterns in terms of the authors, the institutions and the countries confirm the presence of Brazil in multinational Big Science experiments, which may also explain the prevalence of foreign citing documents (all types), emphasizing the international prestige and visibility of the output of Brazilian scientists. We concluded that the scientometric indicators suggested scientific maturity in the Brazilian HEP community due to its long history of experimental research.

  14. Radiocarbon dating of archaeological samples (sambaqui) using CO(2) absorption and liquid scintillation spectrometry of low background radiation.

    PubMed

    Mendonça, Maria Lúcia T G; Godoy, José M; da Cruz, Rosana P; Perez, Rhoneds A R

    2006-01-01

    Sambaqui means, in the Tupi language, a hill of shells. The sambaquis are archaeological sites with remains of pre-historical Brazilian occupation. Since the sambaqui sites in the Rio de Janeiro state region are older than 10,000 years, the applicability of CO(2) absorption on Carbo-sorb and (14)C determination by counting on a low background liquid scintillation counter was tested. In the present work, sambaqui shells were treated with H(3)PO(4) in a closed vessel in order to generate CO(2). The produced CO(2) was absorbed on Carbo-sorb. On saturation about 0.6g of carbon, as CO(2), was mixed with commercial liquid scintillation cocktail (Permafluor), and the (14)C activity determined by counting on a low background counter, Packard Tricarb 3170 TR/SL, for a period of 1000 mins to enable detection of a radiocarbon age of 22,400 BP. But only samples with ages up to 3500 BP were submitted to the method because the samples had been collected in the municipality of Guapimirim, in archaeological sambaqui-type sites belonging to this age range. The same samples were sent to the (14)C Laboratory of the Centro de Energia Nuclear na Agricultura (CENA/USP) where similar results were obtained.

  15. KSC-97pc672

    NASA Image and Video Library

    1997-04-19

    McDonnell Douglas-SPACEHAB technicians oversee the move of a Russian-made oxygen generator to a SPACEHAB Double Module, at rear, in the SPACEHAB Payload Processing Facility. In foreground, from left, are Marc Tuttle, Dan Porter and Mike Vawter. The oxygen generator, manufactured in Russia by RSC Energia, will be carried aboard the Space Shuttle Atlantis on Mission STS-84 for the Shuttle’s scheduled docking with the Russian Space Station Mir next month. The nearly 300-pound generator will replace one of two Mir units that have been malfunctioning recently. The generator functions by electrolysis, which separates water into its oxygen and hydrogen components. The hydrogen is vented and the oxygen is used for breathing by the Mir crew. The generator is 4.2 feet in length and 1.4 feet in diameter. STS-84, which is planned to include a Mir crew exchange of astronaut C. Michael Foale for Jerry M. Linenger, is targeted for a May 15 liftoff

  16. KSC-97pc675

    NASA Image and Video Library

    1997-04-19

    KENNEDY SPACE CENTER, FLA. -- McDonnell Douglas-SPACEHAB technicians strap in place a Russian-made oxygen generator on the floor of a SPACEHAB Double Module, being prepared for flight in the SPACEHAB Payload Processing Facility. From left, are Mark Halavin and Marc Tuttle. The oxygen generator, manufactured in Russia by RSC Energia, will be carried aboard the Space Shuttle Atlantis on Mission STS-84 for the Shuttle’s scheduled docking with the Russian Space Station Mir next month. The nearly 300-pound generator will replace one of two Mir units that have been malfunctioning recently. The generator functions by electrolysis, which separates water into its oxygen and hydrogen components. The hydrogen is vented and the oxygen is used for breathing by the Mir crew. The generator is 4.2 feet in length and 1.4 feet in diameter. STS-84, which is planned to include a Mir crew exchange of astronaut C. Michael Foale for Jerry M. Linenger, is targeted for a May 15 liftoff. It will be the sixth Shuttle-Mir docking

  17. KSC-97pc673

    NASA Image and Video Library

    1997-04-19

    KENNEDY SPACE CENTER, FLA. -- McDonnell Douglas-SPACEHAB technicians oversee the move of a Russian-made oxygen generator to a SPACEHAB Double Module, at rear, in the SPACEHAB Payload Processing Facility. With faces visible in center foreground, from left, are Mark Halavin and Marc Tuttle; Mike Vawter is at far right. The oxygen generator, manufactured in Russia by RSC Energia, will be carried aboard the Space Shuttle Atlantis on Mission STS-84 for the Shuttle’s scheduled docking with the Russian Space Station Mir next month. The nearly 300-pound generator will replace one of two Mir units that have been malfunctioning recently. The generator functions by electrolysis, which separates water into its oxygen and hydrogen components. The hydrogen is vented and the oxygen is used for breathing by the Mir crew. The generator is 4.2 feet in length and 1.4 feet in diameter. STS-84, which is planned to include a Mir crew exchange of astronaut C. Michael Foale for Jerry M. Linenger, is targeted for a May 15 liftoff. It will be the sixth Shuttle-Mir docking

  18. Hydropower Resource Assessment of Brazilian Streams

    SciTech Connect

    Douglas G. Hall

    2011-09-01

    The Idaho National Laboratory (INL) in collaboration with the U.S. Geological Survey (USGS) with the assistance of the Empresa de Pesquisa Energetica (EPE) and the Agencia Nacional de Energia Electrica (ANEEL) has performed a comprehensive assessment of the hydropower potential of all Brazilian natural streams. The methodology by which the assessment was performed is described. The results of the assessment are presented including an estimate of the hydropower potential for all of Brazil, and the spatial distribution of hydropower potential thus providing results on a state by state basis. The assessment results have been incorporated into a geographic information system (GIS) application for the Internet called the Virtual Hydropower Prospector do Brasil. VHP do Brasil displays potential hydropower sites on a map of Brazil in the context of topography and hydrography, existing power and transportation infrastructure, populated places and political boundaries, and land use. The features of the application, which includes tools for finding and selecting potential hydropower sites and other features and displaying their attributes, is fully described.

  19. Partners assume risks, lower finance costs of delayed coker-cogeneration project in Chile

    SciTech Connect

    Alveal, E.D.; Karpenski, M.J.

    1997-03-31

    Foster Wheeler Power Systems Inc., and its partners--Petrox SA Refineria de Petroleo and Empresa Nacional de Petroleo (ENAP), the Chilean national oil company--closed on the financing of Petropower Energia Limitada, a $237 million financed combination delayed coker-cogeneration facility. The facility is now under construction adjacent to Petrox`s 84,000 b/d Talcahuano refinery, near Concepcion. In addition to the low interest rate of 7.36%--only 170 basis points over the 10 year US Treasury yield--the project was rated investment-grade by Standard and Poor`s. The Petropower project also has the distinction of having the longest term--18 years--for any project financing in Latin America. The project is unique in other ways: it is the Republic of Chile`s first public/private partnership and also the first project to combine petroleum coking technology with cogeneration technology in a single project financing. The paper discusses risk assumption, the Petropower project, organization, delayed coker facility, hydrotreater unit, cogeneration facility, environmental assessment, Chile`s changing market, and project benefit.

  20. United States/Mexico electricity exchanges. [History, incentives, and constraints

    SciTech Connect

    None,

    1980-05-01

    As a result of the agreement between the respective presidents, a joint study was undertaken to analyze the possibilities of increasing the international electricity exchange between the two countries. Responsibility for this undertaking was assigned to the United States Department of Energy (DOE) and to the Direccion de Energia de Mexico (DEM) through the Comision Federal de Electricidad (CFE). Representatives from Mexico and the US were chosen from the regional utilities along the border between the two countries and made up working groups that particiated in the study. With the support of both governments, and a high degree of cooperation between the two countries, work on the study was completed within fourteen months The completion of the study has been a major step in broadening the base of bilateral energy relations. the study highlights the opportunities for increased electricity exchanges, which could increase cooperation along the common border. Expansion of electricity interchange could offer substantial economic benefit to both countries, both directly and indirectly. Direct benefits include increased reliability of electric power and cost savings through economies of scale and diversity of peak demand patterns. Indirect benefits include improved economic and employment opportunities, especially in the border areas of both countries. This report provides background on the history of past exchanges and the characteristics of the US and Mexico electric systems, a summary of opportunities and incentives, and suggestions for procedures to remove obstacles and constraints.

  1. SUS in nuclear medicine in Brazil: analysis and comparison of data provided by Datasus and CNEN*

    PubMed Central

    Pozzo, Lorena; Coura Filho, George; Osso Júnior, João Alberto; Squair, Peterson Lima

    2014-01-01

    Objective To investigate the outpatient access to nuclear medicine procedures by means of the Brazilian Unified Health System (SUS), analyzing the correspondence between data provided by this system and those from Comissão Nacional de Energia Nuclear (CNEN) (National Commission of Nuclear Energy). Materials and Methods Data provided by Datasus regarding number of scintillation chambers, outpatient procedures performed from 2008 to 2012, administrative responsibility for such procedures, type of service providers and outsourced services were retrieved and evaluated. Also, such data were compared with those from institutions certified by CNEN. Results The present study demonstrated that the system still lacks maturity in terms of correct data input, particularly regarding equipment available. It was possible to list the most common procedures and check the growth of the specialty along the study period. Private centers are responsible for most of the procedures covered and reimbursed by SUS. However, many healthcare facilities are not certified by CNEN. Conclusion Datasus provides relevant data for analysis as done in the present study, although some issues still require attention. The present study has quantitatively depicted the Brazilian reality regarding access to nuclear medicine procedures offered by/for SUS. PMID:25741070

  2. FTIR-spectroscopy from space: the miriam mission

    NASA Astrophysics Data System (ADS)

    Furrer, R.; Antonov, V. V.; Timofeyev, Yu. M.

    To evaluate the physical and chemical processes in our atmosphere with special emphasis to anthropogenic impacts a long term IR-experiment is planned on the space station MIR by a joint german-russian group (``MIRIAM'', MIR Infrared Atmospheric Measurements). With a newly developed fast scanning Fourier-Transform-IR Spectrometer (DOPI) sun-absorption measurements will be done during orbital sunsets. The mission succeeds the goals of some recent space experiments and also compliments the scientific perspectives of the Upper Atmosphere Research Satellite (UARS) and the ATMOS program (Space Shuttle). The experiment was proposed by scientists from the Free University Berlin (Germany), from the St. Petersburg State University (Russia) and from NPO Energia, Moscow (Russia) and will analyze the time/space distribution of more than 30 atmospheric trace gases for more then 3 years. In combination with some other instruments of the PRIRODA and SPECTR moduls (OZON-MIR, ISTOK-1, MERIS, PHENIX, MOS-OBSOR and ALISSA) DOPI will be launched in 1995. The retrieved long term data are expected to improve our present understanding about the composition, the chemistry and the dynamics of our atmosphere. The paper outlines some of the mission objectives and reports on a few experimental and theoretical aspects.

  3. Market Assessment and Technical Feasibility Study of Pressurized Fluidized Bed Combustion Ash Use

    SciTech Connect

    Bland, A.E.; Brown, T.H.

    1996-12-31

    Western Research Institute in conjunction with the Electric Power Research Institute, Foster Wheeler Energy International, Inc. and the U.S. Department of Energy Technology Center (METC), has undertaken a research and demonstration program designed to examine the market potential and the technical feasibility of ash use options for pressurized fluidized bed combustion (PFBC) ashes. The assessment is designed to address six applications, including: (1) structural fill, (2) road base construction, (3) supplementary cementing materials in portland cement, (4) synthetic aggregate, and (5) agricultural/soil amendment applications. Ash from low-sulfur subbituminous coal-fired Foster Wheeler Energia Oy pilot circulating PFBC tests in Karhula, Finland, and ash from the high-sulfur bituminous coal-fired American Electric Power (AEP) bubbling PFBC in Brilliant, Ohio, were evaluated in laboratory and pilot-scale ash use testing. This paper addresses the technical feasibility of ash use options for PFBC unit using low- sulfur coal and limestone sorbent (karhula ash) and high-sulfur coal and dolomite sorbents (AEP Tidd ash).

  4. Fontes binárias supermoles de raios X

    NASA Astrophysics Data System (ADS)

    Pires, A. M.; Janot Pacheco, E.

    2003-08-01

    Estuda-se as características físicas das fontes supermoles (de raios X (SSS), utilizando dados ópticos e em altas energias, no âmbito de um trabalho de IC. Trata-se de binárias que apresentam espectro X muito mole, baixas temperaturas e altas luminosidades bolométricas. Esse sistemas são compostos por uma anã branca realizando fusão em sua superfície, a partir de matéria perdida pela estrela companheira. Os resíduos de fusão se acumulam na superfície da anã branca, e essa pode ultrapassar o limite de Chadrasekhar, produzir um colapso gravitacional, sendo esse um dos cenários propostos para as explosões de SN Ia. Apresentamos nesta comunicação o estado da arte das características físicas das fontes SSS, situando-as no âmbito das VCs. Procuramos também situar esses objetos em relação às variáveis galácticas V Sge, na medida em que os dois grupos apresentam certas caracerísticas bastante semelhantes.A metodologia adotada é aquela pedagógico-cognitiva clássica de um trabalho de IC na área de ciências exatas.

  5. KSC-99pp0347

    NASA Image and Video Library

    1999-03-25

    At Astrotech in Titusville, Fla., STS-96 Mission Speciaists Daniel T. Barry (left), Julie Payette (center, with camera), and Tamara E. Jernigan (right, pointing) get a close look at one of the payloads on their upcoming mission. Other crew members are Commander Kent V. Rominger, and Mission Specialists Ellen Ochoa and Valery Ivanovich Tokarev, with the Russian Space Agency. Payette is with the Canadian Space Agency. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS); the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999

  6. KSC-99pp0345

    NASA Image and Video Library

    1999-03-25

    At Astrotech in Titusville, Fla., members of two Shuttle crews take a close look at components of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). From left are STS-96 Mission Specialists Daniel T. Barry and Tamara E. Jernigan, Pilot Rick Douglas Husband, and Mission Specialist Julie Payette; next to them is STS-101 Mission Specialist Yuri Ivanovich Malenchenko, with the Russian Space Agency. Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999

  7. KSC-99pp0343

    NASA Image and Video Library

    1999-03-25

    At Astrotech in Titusville, Fla., members of two Shuttle crews look at components of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). From left are STS-96 Mission Specialist Julie Payette and Daniel T. Barry, Commander Kent V. Rominger and Mission Specialist Tamara E. Jernigan; three technicians from DaimlerChrysler Aerospace; (in the background, facing right) STS-101 Commander James Donald Halsell Jr.; STS-101 Mission Specialists Yuri Ivanovich Malenchenko, with the Russian Space Agency, and Edward Tsang Lu; and two more technicians from DaimlerChrysler. Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999

  8. KSC-99pp0344

    NASA Image and Video Library

    1999-03-25

    At Astrotech in Titusville, Fla., members of two Shuttle crews get a close look at components of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). At left are STS-96 Mission Specialist Daniel T. Barry and Pilot Rick Douglas Husband. At center, STS-96 Mission Specialist Tamara E. Jernigan gives her attention to a technician with DaimlerChrysler while STS-101 Mission Specialist Edward Tsang Lu looks on. Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999

  9. KSC-99pp0348

    NASA Image and Video Library

    1999-03-25

    At Astrotech in Titusville, Fla., STS-96 Mission Specialists Tamara E. Jernigan and Daniel T. Barry take turns working with a Russian cargo crane, the Strela, which is to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). Technicians around the table observe. The STS-96 crew is taking part in a Crew Equipment Interface Test. Other members participating are Commander Kent V. Rominger, Pilot Rick Douglas Husband, and Mission Specialists Julie Payette, with the Canadian Space Agency, and Valery Ivanovich Tokarev, with the Russian Space Agency. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Russian cargo crane; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler Aerospace and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999

  10. KSC-97pc782

    NASA Image and Video Library

    1997-05-11

    STS-84 Mission Specialist Elena V. Kondakova, a cosmonaut with the Russian Space Agency, and her husband, Valery Ryumin, greet press represenatives and other well wishers after her arrival at KSC’s Shuttle Landing Facility. Ryumin is director of the Mir-Shuttle program for RSC Energia in Russia. This will be Kondakova’s first flight on a U.S. Space Shuttle, but her second trip into space. She spent 169 days in space as flight engineer of the 17th main mission on Mir from October 1994 to March 1995. STS-84 will be the sixth docking of the Space Shuttle with the Russian Space Station Mir. During the docking, STS-84 Mission Specialist C. Michael Foale will transfer to the Russian space station to become a member of the Mir 23 crew, replacing U.S. astronaut Jerry M. Linenger, who will return to Earth on Atlantis. Foale is scheduled to remain on Mir about four months until his replacement arrives on STS-86 in September

  11. KSC-99pp0341

    NASA Image and Video Library

    1999-03-25

    Two Shuttle crews take part in familiarization activities at Astrotech in Titusville, Fla. From left are STS-96 Mission Specialists Daniel T. Barry and Tamara E. Jernigan, and Pilot Rick Douglas Husband; plus STS-101 Mission Specialists Edward Tsang Lu and Jeffrey N. Williams. They are looking at components of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler Aerospace of Bremen and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999

  12. KSC-99pp0346

    NASA Image and Video Library

    1999-03-25

    At Astrotech in Titusville, Fla., members of two Shuttle crews take a close look at a component of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). From left, they are STS-101 Mission Specialist Edward Tsang Lu, plus STS-96 Mission Specialist Julie Payette and Pilot Rick Douglas Husband. Payette represents the Canadian Space Agency. Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999

  13. Large Binocular Telescope pre-assembly

    NASA Astrophysics Data System (ADS)

    Miglietta, Luciano; Anaclerio, E.; Castelli, G.; Gallieni, Daniele; Marchiori, Gianpietro; Rossettini, P.; Tassan Din, P.; Tomelleri, R.; Villa, G.; Zanon, Alberto

    2000-08-01

    The Large Binocular Telescope is currently in the pre- assembly phase at the Ansaldo Energia workshop in Milan. Since late 1998 the manufacturing of the Azimuth and Elevation structures has been taken place in North Italy along with the main auxiliary equipments, and since September 1999, the Azimuth Ring have been assembled and aligned on the new concrete foundation poured months before in the same area. The pre-assembly activity in Italy will take some months more from now as the final acceptance tests are scheduled now for December 2000; then the whole telescope steel structure will be disassembled and shipped to Mt. Graham where the final assembling phase will start in spring 2001. In this paper, the authors, part of some industrial companies and public institutes main character in this scientific and technical challenges, briefly describe the manufacturing and the machining processes of the main telescope components, the reached results and the procedures adopted during the pre-assembling as overall test bench for the final erection in Arizona.

  14. 1996 initiatives under the CNEN/DOE safeguards cooperation agreement

    SciTech Connect

    Vinhas, L.; Iskin, M.C.L.; Almeida, S.G. de; Dupree, S.; Reilly, D.; Smith, C.; Whitaker, J.M.

    1996-12-31

    In September 1995, the US Department of Energy (DOE) and the Brazilian Comissao Nacional de Energia Nuclear (CNEN) signed an agreement on methods and technologies for safeguards applications. This agreement provides for cooperation in the areas of nuclear material control, accountancy, verification, physical protection, and advanced containment and surveillance technologies for international safeguards applications. CNEN is responsible for managing nuclear facilities and institutions in Brazil and is responsible for coordinating international safeguards as applied by the International Atomic Energy Agency (IAEA) and the Brazilian-Argentine Agency for Accounting and Control of Nuclear Materials (ABACC). Following the ratification of the Quadripartite Agreement among Argentina, Brazil, ABACC, and IAEA in March 1994, all nuclear materials in all nuclear activities in Brazil became subject to comprehensive safeguards. Collaboration between CNEN and DOE in 1996 is focusing on: (1) the use of a GRAND FORK detector at the Angra Nuclear Power Station, (2) a remote monitoring field trial, (3) workshops on environmental monitoring and analysis as a safeguards application, (4) developing and studying methods and techniques for applying safeguards at enrichment plants, and (5) support of CNEN`s safeguards analytical laboratory. This paper will describe each of the aforementioned safeguards cooperation activities.

  15. A commercial building energy standard for Mexico

    SciTech Connect

    Huang, J.; Warner, J.L.; Wiel, S.; Rivas, A.; Buen, O. de

    1998-07-01

    Beginning in 1992, the Comission Nacional de Ahorro de Energia (CONAE), or Mexican National Commission for Energy Conservation, developed a national energy standard for commercial buildings, with assistance from USAID and LBNL. The first complete draft of the standard was released for public review in mid-1995. To promote public acceptance of the standard, CONAE held advisory meetings with architects, engineers, and utility representatives, and organized pubic workshops presented by the authors, with support from USAID. In response to industry comments, the standard was revised in late 1997 and is currently under review by CONAE. It is anticipated that the revised draft will be released again for final public comments in the summer of 1998. The standard will become law one year after it is finalized by CONAE and published in the federal government record. Since Mexico consists of cooling-dominated climates, the standard emphasizes energy-efficient envelope design to control solar and conductive heat gains. The authors extended DOE-2 simulation results for four climates to all of Mexico through regression analysis. Based on these results, they developed a simplified custom budget calculation approach. To facilitate the method's use, a calculation template was devised in a spreadsheet program and distributed to the public. CONAE anticipates that local engineering associations will use this spreadsheet to administer code compliance.

  16. Integrated renewable energy systems

    SciTech Connect

    Ramakumar, R.

    1995-02-01

    Utilization of several manifestations of solar energy in tandem by means of integrated renewable energy systems (IRES) to supply a variety of energy and other needs has the potential to energize (in contrast to electrification) remote rural areas in a cost-effective manner. Such actions can dramatically improve the quality of life for hundreds of millions of people living in remote villages in the continents of Asia, Africa, and Latin America. The environmentally benign nature of renewable resource utilization and the potability of exploiting locally available resources with the consequent growth of job opportunities are some of the many benefits that can accrue by the deployment of IRES. Even small amounts of energy can be very beneficial in remote rural areas of developing countries with no grid connection as compared to the massive urban sprawls in both developed and developing countries. A concerted global effort in this direction can build the much-needed market potential for renewables now, resulting in future cost reductions. Summaries of the three panel session presentations are assembled here for the readers of the IEEE Power Engineering Review: Designing an Integrated Renewable Energy System, by K. Ashenayi, The University of Tulsa, Tulsa, Oklahoma; Africa-1000: Water in Thousands of Villages, by C. Kashkari Founder, Africa-1000, The University of Akron, Akron, Ohio; Renewables in Mexico, by J. Gutierrez-Vera, Energia Del Siglo 21, Mexico D.F.

  17. Exploration geothermal gradient drilling, Platanares, Honduras, Central America

    SciTech Connect

    Goff, S.J.; Laughlin, A.W.; Ruefenacht, H.D.; Goff, F.E.; Heiken, G.; Ramos, N.

    1988-01-01

    This paper is a review and summary of the core drilling operations component of the Honduras Geothermal Resource Development Project at the Platanares geothermal prospect in Honduras, Central America. Three intermediate depth (428 to 679 m) coreholes are the first continuously cored geothermal exploration boreholes in Honduras. These coring operations are part of the Central America Energy Resource Project (CAERP) effort funded by the Agency for International Development (AID) and implemented by the Los Alamos National Laboratory (Los Alamos) in cooperation with the Empresa Nacional de Energia Electrica (ENEE) and the United States Geological Survey (USGS). This report emphasizes coring operations with reference to the stratigraphy, thermal gradient, and flow test data of the boreholes. The primary objectives of this coring effort were (1) to obtain quantitative information on the temperature distribution as a function of depth, (2) to recover fluids associated with the geothermal reservoir, (3) to recover 75% or better core from the subsurface rock units, and (4) to drill into the subsurface rock as deeply as possible in order to get information on potential reservoir rocks, fracture density, permeabilities, and alteration histories of the rock units beneath the site. The three exploration coreholes drilled to depths of 650, 428 and 679 m, respectively, encountered several hot water entries. Coring operations and associated testing began in mid-October 1986 and were completed at the end of June 1987.

  18. Independent Qualification of the CIAU Tool Based on the Uncertainty Estimate in the Prediction of Angra 1 NPP Inadvertent Load Rejection Transient

    SciTech Connect

    Borges, Ronaldo C.; Alvim, Antonio Carlos M.

    2002-07-01

    The Code with - the capability of - Internal Assessment of Uncertainty (CIAU) is a tool proposed by the 'Dipartimento di Ingegneria Meccanica, Nucleare e della Produzione (DIMNP)' of the University of Pisa. Other Institutions including the nuclear regulatory body from Brazil, 'Comissao Nacional de Energia Nuclear', contributed to the development of the tool. The CIAU aims at providing the currently available Relap5/Mod3.2 system code with the integrated capability of performing not only relevant transient calculations but also the related estimates of uncertainty bands. The Uncertainty Methodology based on Accuracy Extrapolation (UMAE) is used to characterize the uncertainty in the prediction of system code calculations for light water reactors and is internally coupled with the above system code. Following an overview of the CIAU development, the present paper deals with the independent qualification of the tool. The qualification test is performed by estimating the uncertainty bands that should envelope the prediction of the Angra 1 NPP transient RES-11. 99 originated by an inadvertent complete load rejection that caused the reactor scram when the unit was operating at 99% of nominal power. The current limitation of the 'error' database, implemented into the CIAU prevented a final demonstration of the qualification. However, all the steps for the qualification process are demonstrated. (authors)

  19. SPITZER observations of luminous obscured Quasars

    NASA Astrophysics Data System (ADS)

    Bellocchi, E.; Pozzi, F.; Fritz, J.; Comastri, A.; Vignali, C.; Mignoli, M.

    2008-10-01

    Si presentano i risultati di uno studio della distribuzione di energia spettrale (SED) di un campione di sorgenti a z = 0.7-2 selezionate in banda 2-10 keV dalla survey HELLAS2XMM, caratterizzate da luminosita` L_(2-10) keV ~ 10^44 erg/sec e densita` di colonna N_H > 10^22 cm^-2 che le distingue come quasar di tipo II (oscurati). Si sono analizzati i dati ottenuti da Spitzer (4 bande IRAC e MIPS a 24 micron). Le SED sono state modellate utilizzando sia templates empirici di quasar di tipo I (Elvis et al. 1994; Richards et al. 2006) con diversi livelli di estinzione, sia un modello teorico (Fritz et al. 2006) in grado di vincolare i parametri fisici piu` importanti del toro stesso (ad esempio, lo spessore ottico del toro, l'angolo con cui viene osservata la sorgente e il covering factor). Per ciascuna sorgente del campione si e` stimata la luminosita` bolometrica nucleare (10^45-10^47 erg/s) e la correzione bolometrica k_(bol,2-10 keV), definita come il rapporto tra la luminosita` bolometrica e la luminosita` misurata in banda 2-10 keV. Infine, si evidenzia come l'utilizzo dei dati MIPS a 70 e 160 micron sia importante nel vincolare ulteriormente il modello di toro e, di conseguenza, nel fornire una migliore stima della luminosita` infrarossa e bolometrica.

  20. STS-84 oxygen generator for Mir installation

    NASA Technical Reports Server (NTRS)

    1997-01-01

    McDonnell Douglas-SPACEHAB technicians strap in place a Russian- made oxygen generator on the floor of a SPACEHAB Double Module, being prepared for flight in the SPACEHAB Payload Processing Facility. From left, are Mark Halavin and Marc Tuttle. The oxygen generator, manufactured in Russia by RSC Energia, will be carried aboard the Space Shuttle Atlantis on Mission STS-84 for the Shuttles scheduled docking with the Russian Space Station Mir next month. The nearly 300-pound generator will replace one of two Mir units that have been malfunctioning recently. The generator functions by electrolysis, which separates water into its oxygen and hydrogen components. The hydrogen is vented and the oxygen is used for breathing by the Mir crew. The generator is 4.2 feet in length and 1.4 feet in diameter. STS-84, which is planned to include a Mir crew exchange of astronaut C. Michael Foale for Jerry M. Linenger, is targeted for a May 15 liftoff. It will be the sixth Shuttle-Mir docking.

  1. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., STS-96 Mission Speciaists Daniel T. Barry (left), Julie Payette (center, with camera), and Tamara E. Jernigan (right, pointing) get a close look at one of the payloads on their upcoming mission. Other crew members are Commander Kent V. Rominger, and Mission Specialists Ellen Ochoa and Valery Ivanovich Tokarev, with the Russian Space Agency. Payette is with the Canadian Space Agency. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS); the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  2. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., members of two Shuttle crews take a close look at components of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). From left are STS-96 Mission Specialists Daniel T. Barry and Tamara E. Jernigan, Pilot Rick Douglas Husband, and Mission Specialist Julie Payette; next to them is STS-101 Mission Specialist Yuri Ivanovich Malenchenko, with the Russian Space Agency. Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  3. STS-84 oxygen generator for Mir installation

    NASA Technical Reports Server (NTRS)

    1997-01-01

    McDonnell Douglas-SPACEHAB technicians oversee the move of a Russian-made oxygen generator to a SPACEHAB Double Module, at rear, in the SPACEHAB Payload Processing Facility. With faces visible in center foreground, from left, are Mark Halavin and Marc Tuttle; Mike Vawter is at far right. The oxygen generator, manufactured in Russia by RSC Energia, will be carried aboard the Space Shuttle Atlantis on Mission STS-84 for the Shuttles scheduled docking with the Russian Space Station Mir next month. The nearly 300-pound generator will replace one of two Mir units that have been malfunctioning recently. The generator functions by electrolysis, which separates water into its oxygen and hydrogen components. The hydrogen is vented and the oxygen is used for breathing by the Mir crew. The generator is 4.2 feet in length and 1.4 feet in diameter. STS-84, which is planned to include a Mir crew exchange of astronaut C. Michael Foale for Jerry M. Linenger, is targeted for a May 15 liftoff. It will be the sixth Shuttle-Mir docking.

  4. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Two Shuttle crews take part in familiarization activities at Astrotech in Titusville, Fla. From left are STS-96 Mission Specialists Daniel T. Barry and Tamara E. Jernigan, and Pilot Rick Douglas Husband; plus STS-101 Mission Specialists Edward Tsang Lu and Jeffrey N. Williams. They are looking at components of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler Aerospace of Bremen and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  5. STS-84 M.S. Kondakova with husband Ryumin at SLF

    NASA Technical Reports Server (NTRS)

    1997-01-01

    STS-84 Mission Specialist Elena V. Kondakova, a cosmonaut with the Russian Space Agency, and her husband, Valery Ryumin, greet press represenatives and other well wishers after her arrival at KSCs Shuttle Landing Facility. Ryumin is director of the Mir- Shuttle program for RSC Energia in Russia. This will be Kondakovas first flight on a U.S. Space Shuttle, but her second trip into space. She spent 169 days in space as flight engineer of the 17th main mission on Mir from October 1994 to March 1995. STS-84 will be the sixth docking of the Space Shuttle with the Russian Space Station Mir. During the docking, STS-84 Mission Specialist C. Michael Foale will transfer to the Russian space station to become a member of the Mir 23 crew, replacing U.S. astronaut Jerry M. Linenger, who will return to Earth on Atlantis. Foale is scheduled to remain on Mir about four months until his replacement arrives on STS-86 in September.

  6. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., STS-96 Mission Specialists Tamara E. Jernigan and Daniel T. Barry take turns working with a Russian cargo crane, the Strela, which is to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). Technicians around the table observe. The STS-96 crew is taking part in a Crew Equipment Interface Test. Other members participating are Commander Kent V. Rominger, Pilot Rick Douglas Husband, and Mission Specialists Julie Payette, with the Canadian Space Agency, and Valery Ivanovich Tokarev, with the Russian Space Agency. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Russian cargo crane; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler Aerospace and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  7. Recycling and reuse of waste from electricity distribution networks as reinforcement agents in polymeric composites.

    PubMed

    Zimmermann, Matheus V G; Zattera, Ademir J

    2013-07-01

    Of the waste generated from electricity distribution networks, wooden posts treated with chromated copper arsenate (CCA) and ceramic insulators make up the majority of the materials for which no effective recycling scheme has been developed. This study aims to recycle and reuse this waste as reinforcement elements in polymer composites and hybrid composites, promoting an ecologically and economically viable alternative for the disposal of this waste. The CCA wooden posts were cut, crushed and recycled via acid leaching using 0.2 and 0.4N H2SO4 in triplicate at 70°C and then washed and dried. The ceramic insulators were fragmented in a hydraulic press and separated by particle size using a vibrating sieve. The composites were mixed in a twin-screw extruder and injected into the test specimens, which were subjected to physical, mechanical, thermal and morphological characterization. The results indicate that the acid treatment most effective for removing heavy metals in the wood utilizes 0.4NH2SO4. However, the composites made from wood treated with 0.2NH2SO4 exhibited the highest mechanical properties of the composites, whereas the use of a ceramic insulator produces composites with better thermal stability and impact strength. This study is part of the research and development project of ANEEL (Agência Nacional de Energia Elétrica) and funded by CPFL (Companhia Paulista de Força e Luz). Copyright © 2013 Elsevier Ltd. All rights reserved.

  8. STS-84 oxygen generator for Mir installation

    NASA Technical Reports Server (NTRS)

    1997-01-01

    McDonnell Douglas-SPACEHAB technicians oversee the move of a Russian-made oxygen generator to a SPACEHAB Double Module, at rear, in the SPACEHAB Payload Processing Facility. In foreground, from left, are Marc Tuttle, Dan Porter and Mike Vawter. The oxygen generator, manufactured in Russia by RSC Energia, will be carried aboard the Space Shuttle Atlantis on Mission STS-84 for the Shuttles scheduled docking with the Russian Space Station Mir next month. The nearly 300-pound generator will replace one of two Mir units that have been malfunctioning recently. The generator functions by electrolysis, which separates water into its oxygen and hydrogen components. The hydrogen is vented and the oxygen is used for breathing by the Mir crew. The generator is 4.2 feet in length and 1.4 feet in diameter. STS-84, which is planned to include a Mir crew exchange of astronaut C. Michael Foale for Jerry M. Linenger, is targeted for a May 15 liftoff.

  9. SUS in nuclear medicine in Brazil: analysis and comparison of data provided by Datasus and CNEN.

    PubMed

    Pozzo, Lorena; Coura Filho, George; Osso Júnior, João Alberto; Squair, Peterson Lima

    2014-01-01

    To investigate the outpatient access to nuclear medicine procedures by means of the Brazilian Unified Health System (SUS), analyzing the correspondence between data provided by this system and those from Comissão Nacional de Energia Nuclear (CNEN) (National Commission of Nuclear Energy). Data provided by Datasus regarding number of scintillation chambers, outpatient procedures performed from 2008 to 2012, administrative responsibility for such procedures, type of service providers and outsourced services were retrieved and evaluated. Also, such data were compared with those from institutions certified by CNEN. The present study demonstrated that the system still lacks maturity in terms of correct data input, particularly regarding equipment available. It was possible to list the most common procedures and check the growth of the specialty along the study period. Private centers are responsible for most of the procedures covered and reimbursed by SUS. However, many healthcare facilities are not certified by CNEN. Datasus provides relevant data for analysis as done in the present study, although some issues still require attention. The present study has quantitatively depicted the Brazilian reality regarding access to nuclear medicine procedures offered by/for SUS.

  10. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., members of two Shuttle crews look at components of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). From left are STS-96 Mission Specialist Julie Payette and Daniel T. Barry, Commander Kent V. Rominger and Mission Specialist Tamara E. Jernigan; three technicians from DaimlerChrysler Aerospace; (in the background, facing right) STS-101 Commander James Donald Halsell Jr.; STS-101 Mission Specialists Yuri Ivanovich Malenchenko, with the Russian Space Agency, and Edward Tsang Lu; and two more technicians from DaimlerChrysler. Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  11. Soyuz-TM-based interim Assured Crew Return Vehicle (ACRV) for the Space Station Freedom

    NASA Technical Reports Server (NTRS)

    Semenov, Yu. P.; Babkov, Oleg I.; Timchenko, Vladimir A.; Craig, Jerry W.

    1993-01-01

    The concept of using the available Soyuz-TM Assured Crew Return Vehicle (ACRV) spacecraft for the assurance of the safety of the Space Station Freedom (SSF) crew after the departure of the Space Shuttle from SSF was proposed by the NPO Energia and was accepted by NASA in 1992. The ACRV will provide the crew with the capability to evacuate a seriously injured/ill crewmember from the SSF to a ground-based care facility under medically tolerable conditions and with the capability for a safe evacuation from SSF in the events SSF becomes uninhabitable or the Space Shuttle flights are interrupted for a time that exceeds SSF ability for crew support and/or safe operations. This paper presents the main results of studies on Phase A (including studies on the service life of ACRV; spacecraft design and operations; prelaunch processing; mission support; safety, reliability, maintenance and quality and assurance; landing, and search/rescue operations; interfaces with the SSF and with Space Shuttle; crew accommodation; motion of orbital an service modules; and ACRV injection by the Expendable Launch Vehicles), along with the objectives of further work on the Phase B.

  12. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., members of two Shuttle crews get a close look at components of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). At left are STS-96 Mission Specialist Daniel T. Barry and Pilot Rick Douglas Husband. At center, STS-96 Mission Specialist Tamara E. Jernigan gives her attention to a technician with DaimlerChrysler while STS-101 Mission Specialist Edward Tsang Lu looks on. Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  13. Two Shuttle crews check equipment at SPACEHAB to be used on ISS Flights

    NASA Technical Reports Server (NTRS)

    1999-01-01

    At Astrotech in Titusville, Fla., members of two Shuttle crews take a close look at a component of a Russian cargo crane, the Strela, to be mounted to the exterior of the Russian station segment on the International Space Station (ISS). From left, they are STS-101 Mission Specialist Edward Tsang Lu, plus STS-96 Mission Specialist Julie Payette and Pilot Rick Douglas Husband. Payette represents the Canadian Space Agency. Both missions include the SPACEHAB Double Module, carrying internal and resupply cargo for Station outfitting. For the first time, STS-96 will include an Integrated Cargo Carrier (ICC) that will carry the Strela; the SPACEHAB Oceaneering Space System Box (SHOSS), which is a logistics items carrier; and a U.S.-built crane (ORU Transfer Device, or OTD) that will be stowed on the station for use during future ISS assembly missions. The ICC can carry up to 6,000 lb of unpressurized payload. It was built for SPACEHAB by DaimlerChrysler and RSC Energia of Korolev, Russia. STS-96 is targeted for launch on May 24 from Launch Pad 39B. STS-101 is scheduled to launch in early December 1999.

  14. Round-robin pretest analyses of a 1:6-scale reinforced concrete containment model subject to static internal pressurization

    SciTech Connect

    Clauss, D.B.

    1987-05-01

    Analyses of a 1:6-scale reinforced concrete containment model that will be tested to failure at Sandia National Laboratories in the spring of 1987 were conducted by the following organizations in the United States and Europe: Sandia National Laboratories (USA), Argonne National Laboratory (USA), Electric Power Research Institute (USA), Commissariat a L'Energie Atomique (France), HM Nuclear Installations Inspectorate (UK), Comitato Nazionale per la ricerca e per lo sviluppo dell'Energia Nucleare e delle Energie Alternative (Italy), UK Atomic Energy Authority, Safety and Reliability Directorate (UK), Gesellschaft fuer Reaktorsicherheit (FRG), Brookhaven National Laboratory (USA), and Central Electricity Generating Board (UK). Each organization was supplied with a standard information package, which included construction drawings and actual material properties for most of the materials used in the model. Each organization worked independently using their own analytical methods. This report includes descriptions of the various analytical approaches and pretest predictions submitted by each organization. Significant milestones that occur with increasing pressure, such as damage to the concrete (cracking and crushing) and yielding of the steel components, and the failure pressure (capacity) and failure mechanism are described. Analytical predictions for pressure histories of strain in the liner and rebar and displacements are compared at locations where experimental results will be available after the test. Thus, these predictions can be compared to one another and to experimental results after the test.

  15. International Space Station USOS Waste and Hygiene Compartment Development

    NASA Technical Reports Server (NTRS)

    Link, Dwight E., Jr.; Broyan, James Lee, Jr.; Gelmis, Karen; Philistine, Cynthia; Balistreri, Steven

    2007-01-01

    The International Space Station (ISS) currently provides human waste collection and hygiene facilities in the Russian Segment Service Module (SM) which supports a three person crew. Additional hardware is planned for the United States Operational Segment (USOS) to support expansion of the crew to six person capability. The additional hardware will be integrated in an ISS standard equipment rack structure that was planned to be installed in the Node 3 element; however, the ISS Program Office recently directed implementation of the rack, or Waste and Hygiene Compartment (WHC), into the U.S. Laboratory element to provide early operational capability. In this configuration, preserved urine from the WHC waste collection system can be processed by the Urine Processor Assembly (UPA) in either the U.S. Lab or Node 3 to recover water for crew consumption or oxygen production. The human waste collection hardware is derived from the Service Module system and is provided by RSC-Energia. This paper describes the concepts, design, and integration of the WHC waste collection hardware into the USOS including integration with U.S. Lab and Node 3 systems.

  16. Postirradiation examination of high-U-loaded low-enriched U/sub 3/O/sub 8/, UAl/sub 2/, and U/sub 3/Si test fuel plates

    SciTech Connect

    Gomez, J.; Morando, R.; Perez, E.E.; Giorsetti, D.R.; Copeland, G.L.; Hofmann, G.; Snelgrove, J.L.

    1984-01-01

    The scope of this work is to present an evaluation of the postirradiation examination of the second set of high-U-loaded low-enriched U/sub 3/O/sub 8/, UAl/sub 2/ and U/sub 3/Si miniature plates manufactured by the Comision Nacional de Energia Atomica (CNEA) of Argentina, and irradiated and examinated, within the framework of the Reduced Enrichment Research and Test Reactor (RERTR) Program, at Oak Ridge National Laboratory and Argonne National Laboratory. This paper includes fabrication details of the plates, their irradiation history and the results of postirradiation examination which are compared to those of the previous test and to present results from other laboratories participating in the RERTR Program. Postirradiation examination of these plates showed satisfactory poerformance for the oxides, aluminides and silicides (except for the highest-loaded U/sub 3/Si plate) with the only indication of detrimental behavior during the slight bowing of some plates at about 80% burnup.

  17. Mirror-concentrator for space telescope with wide field of view and "high" angular resolution for observation of ultrahigh energy cosmic rays and other atmospheric flashes

    NASA Astrophysics Data System (ADS)

    Sharakin, Sergey A.; Khrenov, Boris A.; Klimov, Pavel A.; Panasyuk, Mikhail I.; Potanin, Sergey A.; Yashin, Ivan V.

    2012-09-01

    Idea of ultrahigh cosmic rays (UHECR) measurement from satellites was suggested by Linsley in 1981 and since has being developed into projects of cosmic rays telescopes for International Space Station (ISS): JEM-EUSO - to be installed on the Japanese experimental module and KLYPVE - on the Russian ISS segment. A series of space-based detectors for measurements of background phenomena in those telescopes were developed in Russia (Universitetsky-Tatiana, Universitetsky-Tatiana-2 , Chibis satellites). The satellite Lomonosov with UHECR detector TUS on its board will be launched in 2013. TUS contains multi-channel photo receiver and Fresnel-type mirror manufactured with use of special multi-layer carbon plastic technology in RSC “Energia". In this paper one and two component optical systems with 360 cm entrance diameter and 400 cm focal distance for wide angle detector KLYPVE are studied. In one component case using generalized Davies-Cotton systems (Fresnel-type mirror with ellipsoidal gross surface) it is possible to obtain 8-10° field of view (FoV) with focal spot size less than pixel size equal to 15 x 15 mm. In two component system (parabolic mirror and a Fresnel lens, mounted close to photo receiver) it is possible to increase FoV up to 10-12° and significantly simplify the primary mirror construction.

  18. Radionuclide Compositions and Total Activity of Spent MTR-HEU Fuel Elements of the IAN-R1 Research Reactor

    SciTech Connect

    Sarta, Jose A.; Castiblanco, Luis A

    2005-05-24

    With cooperation of the International Atomic Energy Agency (IAEA) and the Department of Energy (DOE) of the United States, several calculations and tasks related to the waste disposal of spent MTR fuel enriched nominally to 93% were carried out for the conversion of the IAN-R1 Research Reactor from MTR-HEU fuel to TRIGA-LEU fuel. In order to remove the spent MTR-HEU fuel of the core and store it safely a program was established at the Instituto de Ciencias Nucleares y Energias Alternativas (INEA). This program included training, acquisition of hardware and software, design and construction of a decay pool, transfer of the spent HEU fuel elements into the decay pool and his final transport to Savannah River in United States. In this paper are presented data of activities calculated for each relevant radionuclide present in spent MTR-HEU fuel elements of the IAN-R1 Research Reactor and the total activity. The total activity calculated takes in consideration contributions of fission, activation and actinides products. The data obtained were the base for shielding calculations for the decay pool concerning the storage of spent MTR-HEU fuel elements and the respective dosimetric evaluations in the transferring operations of fuel elements into the decay pool.

  19. Trends of renewables in Mexico

    SciTech Connect

    Gutierrez-Vera, J.

    1996-12-31

    The Mexican Federal Government through its Secretaria de Energia and the Federal Government owned electrical utilities, Comision Federal de Electricidad and Luz y Feurza del Centro, are doing very important efforts in order to give electric power to remote villages in Mexico via PV stand alone systems and hybrid systems with PV modules, wind generators, batteries and a back up diesel electric generator. Nowadays they are trying to take advantage of municipal solid waste in order to get power from the biogas generated in landfills. The main reason for this is, after NAFTA was signed, the municipal authorities in charge of final disposal of MSW will not be allowed any longer to throw away MSW in open fields. Besides, municipal authorities are also in charge of street lighting systems and they have to pay to the utilities a very high rate (12 cents/kWH). The main idea of this paper is how to dispose properly of MSW, fulfilling what is written in the new Environmental Law, and how to take advantage of this process in order to get power from landfill gas at marginal cost. A power wheeling agreement must be reached with the utility in order to send the power generated at the biogas facility to the street lighting lamps, avoiding the high rate for this purpose.

  20. CESA-1 receiver design review. Phase 1. Final report

    SciTech Connect

    Not Available

    1980-07-01

    The Central Electrica Solar de Almeria CESA-1 is a 1.0 MWe water/steam solar central receiver electric power plant being built by the Spanish in Almeria, Spain. Centro de Estudios de la Energia (CEE) is responsible for the management, design, and construction of the project. At the request of the Solar Energy Research Institute and with the approval of the Department of Energy, Sandia National Laboratories, Livermore is providing technical assistance in areas unique to solar applications to CEE. At the request of CEE, Sandia contracted with Foster Wheeler Development Corporation (FWDC) to critically review and evaluate the CESA-1 receiver design. Foster Wheeler Iberia (FWI) was subcontracted to FWDC to coordinate efforts with CEE in Madrid. The FWDC program which was started on July 9, 1979, was subdivided into three tasks: (1) design basis review: critical review of the receiver design specifications and requirements; (2) design review and analyses: critical review of thermal/hydraulic, structural, and materials aspects of the receiver design and the design and analysis procedures used by the designer in critical areas of the design; and (3) operational review: critical review of receiver instrumentation and controls and the operational and safety aspects of the receiver. Results of the design review and evaluation are presented. (WHK)

  1. Soyuz-TM-based interim Assured Crew Return Vehicle (ACRV) for the Space Station Freedom

    NASA Technical Reports Server (NTRS)

    Semenov, Yu. P.; Babkov, Oleg I.; Timchenko, Vladimir A.; Craig, Jerry W.

    1993-01-01

    The concept of using the available Soyuz-TM Assured Crew Return Vehicle (ACRV) spacecraft for the assurance of the safety of the Space Station Freedom (SSF) crew after the departure of the Space Shuttle from SSF was proposed by the NPO Energia and was accepted by NASA in 1992. The ACRV will provide the crew with the capability to evacuate a seriously injured/ill crewmember from the SSF to a ground-based care facility under medically tolerable conditions and with the capability for a safe evacuation from SSF in the events SSF becomes uninhabitable or the Space Shuttle flights are interrupted for a time that exceeds SSF ability for crew support and/or safe operations. This paper presents the main results of studies on Phase A (including studies on the service life of ACRV; spacecraft design and operations; prelaunch processing; mission support; safety, reliability, maintenance and quality and assurance; landing, and search/rescue operations; interfaces with the SSF and with Space Shuttle; crew accommodation; motion of orbital an service modules; and ACRV injection by the Expendable Launch Vehicles), along with the objectives of further work on the Phase B.

  2. Measuring flow and pressure of lithium coolant under developmental testing of a high-temperature cooling system of a space nuclear power plant

    NASA Astrophysics Data System (ADS)

    Sobolev, V. Ya.; Sinyavsky, V. V.

    2014-12-01

    Sub-megawatt space NPP use lithium as a coolant and niobium alloy as a structural material. In order to refine the lithium-niobium technology of the material and design engineering, lithium-niobium loops were worked out in RSC Energia, and they were tested at a working temperature of lithium equal to 1070-1300 K. In order to measure the lithium flow and pressure, special gauges were developed, which made possible the calibration and checkout of the loops without their dismantling. The paper describes the architecture of the electromagnetic flowmeter and the electromagnetic vibrating-wire pressure transducer (gauge) for lithium coolant in the nuclear power plant cooling systems. The operating principles of these meters are presented. Flowmeters have been developed for channel diameters ranging from 10 to 100 mm, which are capable of measuring lithium flows in the range of 0.1 to 30 L/s with the error of 3% for design calibration and 1% for volume graduation. The temperature error of the pressure transducers does not exceed 0.4% per 100 K; the nonlinearity and hysteresis of the calibration curve do not exceed 0.3 and 0.4%, respectively. The transducer applications are illustrated by the examples of results obtained from tests on the NPP module mockup and heat pipes of a radiation cooler.

  3. Assessment of combustion of oil shale refinery by-products in a TP-101 boiler

    NASA Astrophysics Data System (ADS)

    Sidorkin, V. T.; Tugov, A. N.; Vereshchetin, V. A.; Mel'nikov, D. A.

    2015-04-01

    The most cost-efficient method for utilization of the oil shale refinery by-products, viz., the retort gas and the shale gasoline, for power generation is combustion of these products in power-generating oil shale-fired boilers. Calculation studies carried out at the Estonian electric power plant in Narva, an enterprise of EESTI ENERGIA, have shown that recycling of the flue gases in the furnace of a TP-101 boiler enables an increase in the portion of the oil shale refinery by-products burned in the boiler from the current 7% to 40%. Recycling of the flue gases is aimed at maintaining the temperatures in the furnace at a level characteristic of combustion of oil shale and reducing the nitric oxide concentration in the retort gas burners' flame. The degree of the flue gas recycling depends on the percentage of the burnt oil shale refinery by-products in the total heat generation and increases with the increasing percentage. For the threshold value of 40% under the rated conditions, the flue gas recycling accounts for 10%. A complete changeover of the boiler to combustion of only the retort gas in place of the oil shale does not seem to be possible, since this will necessitate major modification to the TP-101 boiler heating surfaces. Considering the obtained results, as a pilot project, one boiler furnace was modified by installing six retort gas burners and a flue gas recycling system.

  4. Mitigation analysis for Estonia

    SciTech Connect

    Martins, A.; Roos, J.; Pesur, A.

    1996-09-01

    The present report provides data on the mitigation analysis of Estonia. The results for energy, forest and agricultural sectors and macro-economic analysis are given. The Government of Estonia has identified the development of energy production as the main strategical means in the movement towards market economy. Now 99% of electricity generation and about 25% of heat production in Estonia is based on oil shale combustion. To increase the efficiency of oil shale-fired power plants and decrease CO{sub 2} emissions, the State Enterprise (SE) Eesti Energia (Estonian Energy) is planning to reconstruct these power plants and introduce the Circulating Fluidized Bed (CFB) combustion technology for oil shale burning to replace the Pulverized Combustion (PC). According to the Estonian Forest Policy, two general objectives are of importance: sustainability in forestry and efficiency in forest management. For the reduction of greenhouse gases (GHG) emissions from agriculture, it is necessary to increase the efficiency of production resource usage. The growth of the GDP in 1995 was 2.9% as a result of large-scale privatization activities in Estonia and re-introduction of the available, but unused production capacities with the help of foreign and domestic investments. It is assumed that the medium growth rate of GDP reaches 6% in 1998.

  5. Status of the International Space Station Waste and Hygiene Compartment

    NASA Technical Reports Server (NTRS)

    Walker, Stephanie; Zahner, Christopher

    2010-01-01

    The Waste and Hygiene Compartment (WHC) serves as the primary system for removal and containment of metabolic waste and hygiene activities on board the United States segment of the International Space Station (ISS). The WHC was launched on ULF 2 and is currently in the U.S. Laboratory and is integrated into the Water Recovery System (WRS) where pretreated urine is processed by the Urine Processor Assembly (UPA). The waste collection part of the WHC system is derived from the Service Module system and was provided by RSC-Energia along with additional hardware to allow for urine delivery to the UPA. The System has been integrated in an ISS standard equipment rack structure for use on the U.S. segment of the ISS. The system has experienced several events of interest during the deployment, checkout, and operation of the system during its first year of use and these will be covered in this paper. Design and on-orbit performance will also be discussed.

  6. Mexican-US cooperation on renewable energy programs

    NASA Astrophysics Data System (ADS)

    Waddle, D. B.

    1991-04-01

    I traveled to Mexico on April 1 with Pete Smith and Chris Rovero of Oak Ridge Associated Universities on a mission sponsored by the Agency for International Development (AID) to initiate a technical support project with Mexican government and private institutions. We met with officials of AID; the Programa Nacional de Solidaridad; the Laboratorio de Energia Solar; Instituto Investigaciones de Electricidad; Comision Federal de Electricidad; Compania de Luz y Fuerza del Centro; and several private firms to discuss the terms of support. An AIDE Memoire was drafted outlining the scope of future assistance. I traveled to San Jose, Cost Rica on April 7, 1991. There I met with Carlos Rodriguez, manager of Cooperativa Electrica de San Carlos, and Federico Baltodano, the director of BEL Ingenieria to discuss the San Lorenzo hydroelectric project. Details of an engineering and financial analysis outlining the costs and benefits of adding daily pondage to the project were discussed, as was the project development schedule and other issues. I returned to Oak Ridge on April 9, 1991.

  7. Um satélite brasileiro para observação do diâmetro solar

    NASA Astrophysics Data System (ADS)

    Emilio, M.; Leister, N. V.; Benevides Soares, P.; Teixeira, R.; Kuhn, J.

    2003-08-01

    Propomos uma missão espacial para medir a forma e o diâmetro solar com o objetivo de ajudar a determinar o potencial gravitacional do Sol e a sua rotação com precisão, testar modelos teóricos de variação de energia e pela primeira vez medir os modos g de oscilação. As observações serão obtidas através do instrumento denominado APT (Astrometric and Photometric Telescope) descrito por Kuhn(1983). A sensibilidade do instrumento é de 0,2 mas em 27 dias para as observações do diâmetro solar feitas a cada minuto. Esta é uma missão de três anos de duração e pode complementar as medidas que serão feitas pelo satélite PICARD (a ser lançado em 2007). Outros parâmetros físicos podem ser obtidos com as mesmas imagens o que certamente interessará à comunidade de física solar. Um primeiro contato foi realizado com a agência espacial brasileira que pretende lançar um satélite científico a cada dois anos.

  8. Identification of irradiated wheat by germination test, DNA comet assay and electron spin resonance

    NASA Astrophysics Data System (ADS)

    Barros, Adilson C.; Freund, Maria Teresa L.; Villavicencio, Ana Lúcia C. H.; Delincée, Henry; Arthur, Valter

    2002-03-01

    In several countries, there has been an increase in the use of radiation for food processing thus improving the quality and sanitary conditions, inhibiting pathogenic microorganisms, delaying the natural aging process and so extending product lifetime. The need to develop analytical methods to detect these irradiated products is also increasing. The goal of this research was to identify wheat irradiated using different radiation doses. Seeds were irradiated with a gamma 60Co source (Gammacell 220 GC) in the Centro de Energia Nuclear na Agricultura and the Instituto de Pesquisas Energéticas e Nucleares. Dose rate used were 1.6 and 5.8kGy/h. Applied doses were 0.0, 0.10, 0.25, 0.50, 0.75, 1.0, and 2.0kGy. After irradiation, seeds were analysed over a 6 month period. Three different detection methods were employed to determine how irradiation had modified the samples. Screening methods consisted of a germination test measuring the inhibition of shooting and rooting and analysis of DNA fragmentation. The method of electron spin resonance spectroscopy allowed a better dosimetric evaluation. These techniques make the identification of irradiated wheat with different doses possible.

  9. On-Field Demonstration Results of Medium Concentration System HSun®

    NASA Astrophysics Data System (ADS)

    Mendes-Lopes, J.; Pina, L.; Reis, F.; Coelho, S.; Wemans, J.; Sorasio, G.; Pereira, N.

    2011-12-01

    The paper presents the HSUN®, a new medium concentration photovoltaic (CPV) system, developed and produced by WS Energia S.A. The low cost manufacturing and standard components used by HSUN® technology increases the potential of the system to reach grid parity. The system was designed to have stable performance and low cost manufacturing, with a total active collector area of 1.68 m2 and 6.3 kg/m2 of weight. Based on a 20X integrated parabolic trough with coupled reflective secondary optics, the system uses high efficiency silicon cells, a passive cooling integrated system and is integrated in 1-axis horizontal tracking structure, the WS CPV HORIZON®. The open-chain configuration ensures that the wind drag is greatly reduced, increasing the reliability of the tracker, while the optimized optics design enables a high acceptance angle and uniform distribution of radiation throughout the PV receiver, using low-cost and low-weight components. Ray tracing simulations and experimental imaging acquisitions of the radiation profile were performed and compared, finite element models were used to perform thermal and structural analysis, and a specifically developed model was used to predict the electrical parameters of the receiver as a function of the concentration. All the components that integrate HSUN® technology are produced with machines used in mature industrial sectors thus guarantying mass production and benefiting from economies of scale. The on-field results are presented and discussed.

  10. [Probiotics: from the lab to the consumer].

    PubMed

    Rodríguez, J M

    2015-02-07

    Introducción: En los últimos años, el campo de los probióticos ha experimentado un gran auge. Sin embargo, de los miles de cepas aisladas cada año por su potencial probiótico en los laboratorios de todo el mundo, muy pocas pasan a una fase de desarrollo industrial y menos aún son las que consiguen una vida comercial. Objetivo: En este artículo, se revisan los principales aspectos que se deben tener en cuenta en el, habitualmente, largo y tortuoso camino que debe seguir una cepa desde su aislamiento inicial hasta su comercialización. Resultados y conclusiones: Cualquier microorganismo probiótico debe estar correctamente identificado a nivel de especie y cepa. La secuencia del genoma es la mejor identificación posible, además de proporcionar información muy valiosa sobre su seguridad, funcionalidad y propiedades de interés tecnológico. Los casos en los que se ha podido establecer una relación entre un probiótico y un efecto adverso son muy escasos y han afectado a personas con patologías subyacentes. Globalmente, aunque las distintas pruebas in vitro, ex vivo y en modelos animales proporcionan información útil durante el proceso de selección de cepas, los únicos datos que permiten evaluar la seguridad y eficacia de un probiótico de una forma directa son los que se obtienen en el curso de ensayos clínicos correctamente diseñados y dirigidos específicamente a la población diana. Por otra parte, las empresas que comercializan probióticos tienen la necesidad de obtener una biomasa muy elevada de forma económicamente rentable y de que la concentración de bacterias viables necesaria para ejercer el efecto beneficioso se mantenga hasta el final de la vida útil del producto. Finalmente, los aspectos comerciales son determinantes en la decisión de afrontar el desarrollo industrial y la puesta en el mercado de un probiótico.

  11. Effects of parenteral fish oil lipid emulsions on colon morphology and cytokine expression after experimental colitis.

    PubMed

    Garib, Ricardo; Garla, Priscila; Torrinhas, Raquel S; Bertevello, Pedro L; Logullo, Angela F; Waitzberg, Dan L

    2013-01-01

    Objetivo: Estudiar los efectos de los diferentes protocolos de infusión de la emulsion de lípidos de aceite de pescado (Fole) sobre la inflamación aguda en el modelo de colitis en la rata. Material y métodos: Ratas Wistar macho adultas (n = 51) fueron asignados al azar en 5 grupos para recibir infusión parenteral de solución salina (SS) o emulsión de lípidos de aceite de soja (SO), como controles, y Fole compone de: aceite de pescado solo (FO), una mezcla (9:1 v/v) de SO con FO (SO/FO), o 30% de aceite de soja, 30% triglicéridos de cadena media, 25% de aceite de oliva, y 15% de aceite de pescado (SMOF). Después de 72 h de infusión intravenosa, colitis experimental fue inducida con ácido acético. Después de 24 h, las muestras de colon se analizaron para determinar cambios histológicos y citoquinas. Resultados: En relación en el SS grupo, necrosis macroscópica fue menos frecuente en el grupo FO y necrosis histológica fue más frecuente en el grupo de SMOF. Existe una relación directa e inversa de colon interleuquina (IL) -1 e IL-4, respectivamente, con necrosis histológica. En comparación con el grupo SS, en el FO hubo aumento de IL-4 e IFN-gamma y disminución de TNF-alfa, SO/FO disminuyó TNF-alfa, y en el SMOF hubo aumento de IL-1 y la disminución de IL-4. Conclusión: En la colitis inducida por ácido acético, la infusion aislada de Fole compuesto de aceite de pescado por sí solo fue más ventajosa en la atenuacion de la inflamacióndo que la infusión de Fole contiendo otros aceites, y esta diferencia puede ser debida las influencias de su diferente contenido de ácido graso.

  12. [Insomnia: prevalence in Cordoba city hospital].

    PubMed

    Fernandez, M E; Lopez, S M; Cazaux, A; Cambursano, V H; Cortes, J R

    2012-01-01

    Introducción: Insomnio es el trastorno caracterizado por sueño deficiente o de mala calidad con consecuencias diurnas adversas. La prevalencia es 30-50% en adultos y puede llevar al desarrollo de depresión. A pesar de las altas tasas de prevalencia es una entidad poco reconocida, subdiagnosticada y subtratada. Poco se ha publicado acerca de la prevalencia en pacientes con enfermedades crónicas. Objetivos: conocer prevalencia y características clínicas del insomnio en pacientes ambulatorios con enfermedades crónicas. Materiales y métodos: Estudio prospectivo descriptivo observacional de corte transversal. Se definió insomnio en base a los criterios del ICSD-2. La obtención de los datos se realizó por un cuestionario autoadministrado. Resultados: Encuestamos a 100 pacientes que acudieron a la consulta de diferentes especialidades clínicas, edad promedio 50 años. El 57% mujeres. El 69% cumplía criterios de insomnio. Las enfermedades más prevalente fueron HTA: 57%; asma: 20%, diabetes: 18% e hipotiroidismo: 17%. Entre los pacientes con insomnio, el 62% fueron mujeres, el 35 % lo presentaban de manera aislada y el restante 65% presentaba condiciones asociadas a insomnio secundario (el 60% presentaban depresión). La cuarta parte de los pacientes consultó por insomnio alguna vez. La prevalencia de criterios de depresión en los enfermos crónicos analizados fue de 52%, y asciende a 63% en los pacientes que padecen insomnio. Discusión: La prevalencia de insomnio en pacientes con enfermedades crónicas es alta, siendo en pacientes ambulatorios con enfermedades crónicas del 69%, muy superior a la media descripta en la población general. Es una entidad subtratada. Conclusiones: La prevalencia de insomnio en pacientes con enfermedades crónicas es alta, está subdiagnosticada y subtratada. Presenta una asociación significativa con depresión.

  13. [Prevalence of malnutrition in a mid-long term stay unit].

    PubMed

    Argente Pla, María; García Malpartida, Katherine; León De Zayas, Beatriz; Martín Sanchis, Silvia; Micó García, Andrea; Del Olmo García, Maria Isabel; Moral Moral, Pedro; Moreno Muñoz, Iván; Beseler Soto, Rosario; Ramos Prol, Agustín; Merino Torres, Juan Francisco

    2014-10-06

    Introducción: La desnutrición es un problema de salud frecuente, especialmente en el ámbito hospitalario donde se asocia con estancias más prolongadas y mayor tasa de morbi-mortalidad. Por otro lado, los avances científicos actuales y la mayor expectativa de vida, han producido un aumento progresivo de unidades de media y larga estancia (UMLE). Objetivos: Determinar la prevalencia de desnutrición en una UMLE mediante el uso del MNA y la VGS, así como analizar los factores/características clínicas asociadas a la misma y sus repercusiones. Métodos: Estudio transversal, descriptivo de una cohorte formada por 201 pacientes ingresados en la UMLE de un Hospital universitario de forma consecutiva durante 12 meses. Se recogieron variables clínicas, antropométricas, bioquímicas e historia nutricional, así como escala de comorbilidad de Charlson, escala cognitiva de Pfeiffer, escala funcional de Barthel y presencia de edemas, ascitis y úlceras por presión. El estado nutricional fue evaluado en las primeras 24-72 horas de ingreso mediante el MNA y la VGS. La presencia de disfagia se evaluó mediante el cuestionario EAT-10 y el MECV-V. Resultados: La prevalencia global de desnutrición fue del 76,6%, siendo la desnutrición mixta grave la más prevalente (20.4%). Los pacientes desnutridos tenían más edad (p=0,002), mayor grado de dependencia (p.

  14. Design and validation of the INICIARE instrument, for the assessment of dependency level in acutely ill hospitalised patients.

    PubMed

    Morales-Asencio, José Miguel; Porcel-Gálvez, Ana María; Oliveros-Valenzuela, Rosa; Rodríguez-Gómez, Susana; Sánchez-Extremera, Lucrecia; Serrano-López, Francisco Andrés; Aranda-Gallardo, Marta; Canca-Sánchez, José Carlos; Barrientos-Trigo, Sergio

    2015-03-01

    The aim of this study was to establish the validity and reliability of an instrument (Inventario del NIvel de Cuidados mediante IndicAdores de clasificación de Resultados de Enfermería) used to assess the dependency level in acutely hospitalised patients. This instrument is novel, and it is based on the Nursing Outcomes Classification. Multiple existing instruments for needs assessment have been poorly validated and based predominately on interventions. Standardised Nursing Languages offer an ideal framework to develop nursing sensitive instruments. A cross-sectional validation study in two acute care hospitals in Spain. This study was implemented in two phases. First, the research team developed the instrument to be validated. In the second phase, the validation process was performed by experts, and the data analysis was conducted to establish the psychometric properties of the instrument. Seven hundred and sixty-one patient ratings performed by nurses were collected during the course of the research study. Data analysis yielded a Cronbach's alpha of 0·91. An exploratory factorial analysis identified three factors (Physiological, Instrumental and Cognitive-behavioural), which explained 74% of the variance. Inventario del NIvel de Cuidados mediante IndicAdores de clasificación de Resultados de Enfermería was demonstrated to be a valid and reliable instrument based on its use in acutely hospitalised patients to assess the level of dependency. Inventario del NIvel de Cuidados mediante IndicAdores de clasificación de Resultados de Enfermería can be used as an assessment tool in hospitalised patients during the nursing process throughout the entire hospitalisation period. It contributes information to support decisions on nursing diagnoses, interventions and outcomes. It also enables data codification in large databases. © 2014 John Wiley & Sons Ltd.

  15. [Energy expenditure prediction equations in burn patients; bibliographic review].

    PubMed

    Núñez-Villaveirán, Teresa; Sánchez, Manuel; Millán, Pablo; Martínez-Méndez, Jose Ramón; Iglesias, Carmen; Casado-Pérez, César; García-de-Lorenzo, Abelardo

    2014-06-01

    Introducción: La valoración de las necesidades calóricas del paciente quemado se ha basado en la medición del gasto energético en reposo (GER) mediante calorimetría indirecta, no siempre disponible en las unidades de quemados, o en su estimación mediante el uso de ecuaciones predictivas. Objetivos: analizar la historia y estado del arte del uso de las ecuaciones predictivas de GER en el paciente quemado crítico, y determinar su validez. Métodos: revisión bibliográfica de estudios y revisiones en español y en inglés entre 1989 y 2013. Resultados: Se han diseñado más de 190 ecuaciones para estimar el gasto energético que pueden ser imprecisas por estar basadas en mediciones con metodología heterogénea y en grupos heterogéneos. Describimos los distintos parámetros que aplican las distintas fórmulas predictivas (factores de estrés y de actividad, superficie corporal quemada, tiempo desde la lesión, masa corporal magra), la influencia de la edad en el cálculo de las necesidades calóricas y las fórmulas más utilizadas en el momento actual. También describimos los artículos que evalúan exactitud de las fórmulas cuando se comparan con mediciones mediante calorimetría indirecta. Conclusiones: Las ecuaciones predictivas son poco precisas en general en el paciente quemado. Hasta que se desarrollen ecuaciones predictivas más precisas, recomendamos calcular los requerimientos nutricionales de los pacientes quemados basándose en la medición del gasto energético por calorimetría indirecta.

  16. [Patients'adherence-related beliefs about medicines prescribed for long-term conditions in HIV patients].

    PubMed

    Haro Márquez, Carmen; Cantudo Cuenca, Maria Rosa; Almeida González, Carmen Victoria; Morillo Verdugo, Ramón

    2015-01-01

    Objetivo: Determinar a adherencia y las creencias hacia la medicacion para patologias cronicas concomitantemente prescrita al TAR en pacientes infectados por el VIH, asi como determinar si existen diferencias significativas en las creencias entre los pacientes adherentes y no adherentes al los tratamientos concomitantes al TAR. Método: Estudio transversal llevado a cabo durante mayo y julio 2014 en pacientes VIH+ con tratamiento antirretroviral y uno o mas medicamentos para patologias cronicas. Se recogieron variables sociodemograficas: edad, sexo, educacion, situacion laboral, si vivia solo; clinicas: modo de transmision de la infeccion, carga viral plasmatica, T-CD4, estadio; y farmacoterapeuticas: tipo de tratamiento antirretroviral, comedicacion y adherencia a esta mediante el cuestionario Morisky. Se midieron las creencias hacia dicha comedicacion mediante el Beliefs about Medicines Questionnare (BMQ), que incluye dos escalas, necesidad y preocupacion. Los datos se analizaron con SPSSR 20.0. Se aplico la prueba t de Student. La fiabilidad del cuestionario se estimo mediante el alfa de Cronbach. Resultados: Se incluyeron 126 pacientes (80.4% hombres, 49}8.3 anos). El numero de medicamentos concomitantes fue 2.9}2.0. Se clasifico como no adherente al 54.0%. El 63.5% tenia sida, que se identifico como una variable independiente predictora de no adherencia. Las diferencias en la escala de preocupacion entre los pacientes no adherentes y adherentes fue estadisticamente significativa (14.6}5.7 vs. 12.1}6.1; p=0.019), mientras que en aquellas relativas a la necesidad no hubo diferencias (17.3}5.6 vs. 18.8}4.4; p=0.188). La fiabilidad del BMQ-especifico, asi como de las escalas de necesidad y preocupacion, fue buena (0.724, 0.794, 0.785, respectivamente). Conclusiones: Los pacientes VIH positivos con otras patologias cronicas no adherentes presentan creencias negativas relacionadas con la preocupacion en cuanto a la comedicacion.

  17. ALHAMBRA-survey: a new tool for photo-z calibrations in absence of spec-z information

    NASA Astrophysics Data System (ADS)

    Molino Benito, A.; Benitez Lozano, N.; The Alhambra-Team

    2013-05-01

    La estimación de los desplazamientos al rojo (redshift) de las galaxias, derivados mediante fotometría multi-banda, se conoce con el nombre de photometric redshifts (photo-z). Es bien sabido que la precisión alcanzable por estas técnicas puede verse incrementada si se dispone de una muestra espectroscópica de galaxias (cuyos redshifts (spec-z) sean conocidos) con la que re-calibrar los puntos cero fotométricos. (Coe et al. 2006, Ilbert et al. 2008, Molino et al. 2012 in prep). ALHAMBRA-survey, que es un cartografiado extragaláctico (de ˜4 grados cuadrados) dedicado a la realización de un estudio de la evolución de las propiedades y contenido del Universo (Moles et al. 2005, 2008), presenta solapamientos parciales con otros cartografiados espectroscópicos ya existentes con el objetivo de validar y mejorar la precisión de sus photo-z. Sin embargo, dada la variabilidad fotométrica entre sus campos, resulta ineficiente extrapolar las correcciones de punto cero, introduciendo sesgos de inhomogeneidad en la precisión de los resultados. En este trabajo se presenta una nueva metodología que permite mejorar la calibración de los puntos cero fotométricos mediante la utilización de la información estadística proporcionada por los propios photo-z. Mediante esta técnica resulta posible no sólo mejorar la precisión de las estimaciones sino, además, soslayar la necesidad de obtener grandes muestras espectroscópicas.

  18. [Effect of gastric bypass on the cardiovascular risk and quality of life in morbid obese patients].

    PubMed

    Mateo Gavira, I; Vílchez López, F J; Cayón Blanco, M; García Valero, A; Escobar Jiménez, L; Mayo Ossorio, M A; Pacheco García, J M; Vázquez Gallego, J M; Aguilar Diosdado, M

    2014-03-01

    Objetivos: Determinar la prevalencia de las principales comorbilidades asociadas a la obesidad mórbida y evaluar el efecto del bypass gástrico sobre el estado ponderal, riesgo cardiovascular y calidad de vida en estos pacientes. Métodos: Estudio descriptivo con medidas del cambio intrasujeto (antes-después) en una muestra de 162 pacientes de los resultados del bypass gástrico sobre la evolución ponderal, comorbilidades asociadas, riesgo cardiovascular a 10 años (estimado mediante las tablas de Framingham) y calidad de vida mediante el test BAROS (Bariatric Analysis and Reporting Outcome System). Resultados: El índice de masa corporal (IMC) se reduce de 51,12 ± 7,22 kg/m2 a 29,94 ± 4,86 kg/m2 (72,85% de sobrepeso perdido) y se resuelven la hipertensión arterial (HTA), la dislipemia y la diabetes mellitus tipo 2 (DMT2) en el 71,93%, 91,38% y 82,93% respectivamente (p < 0,001). El riesgo cardiovascular mayor del 10% se reduce del 25,91% al 4,32% (p < 0,001). Según la escala BAROS, el resultado de la cirugía fue favorable en el 95% de los casos. Conclusiones: La cirugía bariátrica mediante bypass gástrico demuestra ser muy efectiva para la reducción ponderal y comorbilidades asociadas, mejorando notablemente la calidad de vida.

  19. [In Process Citation].

    PubMed

    Schnettler, Berta; Höger, Yesly; Orellana, Ligia; Sepúlveda, José; Salinas-Oñate, Natalia; Lobos, Germán; Grunert, Klaus G

    2016-03-25

    Objetivo: caracterizar tipologías de estudiantes universitarios según la percepción de los hábitos alimentarios de sus familias. Material y método: se aplicó un cuestionario a una muestra no probabilística de 372 estudiantes de ambos géneros de la Universidad de La Frontera, Chile. El instrumento incluyó: Cuestionario de Hábitos Alimentarios Familiares (FEHQ), Satisfaction with Life Scale (SWLS), Satisfaction with Food-related Life (SWFL) y la Escala de Recursos Familiares (FRS). Se consultó peso y estatura aproximada, así como variables sociodemográficas. Resultados: mediante análisis factorial exploratorio (AFE) se detectaron tres factores en el FEHQ: importancia de la alimentación para los miembros de la familia, cohesión en las comidas familiares y presión por comer. Mediante AFE se detectaron dos factores en la FRS: apoyo intangible y tangible. Mediante análisis factorial confirmatorio se validó la estructura del FEHQ y de la FRS con aceptables niveles de bondad de ajuste. Mediante análisis clúster se distinguieron cuatro tipologías que difirieron significativamente en las puntuaciones de los componentes del FEHQ y de la FRS, puntajes de la SWLS y SWFL, índice de masa corporal, género y nivel socioeconómico. Las tipologías con mayores puntuaciones en "cohesión en las comidas familiares" reportan mayor apoyo intangible de sus familias y superiores puntuaciones en la SWLS y SWFL. Conclusiones: los resultados muestran que la frecuencia y la importancia asignada a las comidas en familia se asocian positivamente con el apoyo familiar percibido, especialmente en recursos intangibles, así como también con la satisfacción global con la vida y en el dominio de la alimentación.

  20. [Egg intake and cardiovascular risk factors in adolescents: role of physical activity; the HELENA study].

    PubMed

    Soriano-Maldonado, A; Cuenca-García, M; Moreno, L A; González-Gross, M; Leclercq, C; Androutsos, O; Guerra-Hernández, E J; Castillo, M J; Ruiz, J R

    2013-01-01

    Introducción: Las enfermedades cardiovasculares (ECVs) suponen la principal causa de morbi-mortalidad en los países occidentales. El incremento del colesterol plasmático se ha relacionado con el desarrollo de ECV. El huevo, por su alto contenido en colesterol, ha sido indirectamente relacionado con el riesgo de desarrollar ECVs. Objetivo: Examinar la asociación entre ingesta de huevo y factores de riesgo cardiovascular en adolescentes, estudiando si dicha relación está influenciada por la actividad física. Método: Se estudiaron 380 adolescentes pertenecientes al estudio HELENA (HEalthy Lifestyle in Europe by Nutrition in Adolescence). La ingesta de alimentos se estimó mediante anamnesis nutricional de dos días no consecutivos. Se midieron indicadores de adiposidad, perfil lipídico, glucosa, insulina, resistencia a la insulina, tensión arterial y capacidad aeróbica. Se calculó un índice integrado de riesgo cardiovascular (IRCV) como medida del perfil cardiovascular global. La actividad física se midió mediante acelerometría. Se examinó el desarrollo madurativo. El estatus socioeconómico y consumo de tabaco se obtuvieron mediante cuestionario. La asociación entre ingesta de huevo y factores de riesgo de ECV se examinó mediante un modelo de regresión multinivel ajustado por factores de confusión. Resultados: La ingesta de huevo no se asoció con perfil lipídico, nivel de adiposidad, tensión arterial, resistencia a la insulina, capacidad aeróbica o IRCV (todos P > 0,05). Esta falta de asociación no estuvo influenciada por el nivel de actividad física. Conclusiones: Estos resultados sugieren que no existe asociación entre ingesta de huevo y perfil lipídico, adiposidad, resistencia a la insulina, tensión arterial, capacidad aeróbica o el IRCV en adolescentes. La actividad física no influencia dicha falta de asociación.

  1. [Isolated bacteria from nasal cultures. Are they important in patients with acute leukemia?].

    PubMed

    Barranco-Lampón, Gilberto; Mendoza-García, Carlos Alberto; Cabrera-Osuna, Silvia; Olarte-Carrillo, Irma; Ventura, Yanet; Gutiérrez-Romero, Mario; Martínez-Murillo, Carlos; Martínez-Tovar, Adolfos; Ramos-Peñafiel, Christian Omar

    2014-01-01

    INTRODUCCIÓN: la colonización nasal por Staphylcoccus epidermidis y Staphylococcus aureus es frecuente y se ha relacionado con bacteremia en huéspedes inmunocomprometidos. En la investigación que se presenta, los objetivos fueron determinar la frecuencia de cepas que colonizan la mucosa nasal en pacientes en tratamiento de leucemia aguda y su relación con los cultivos de sangre periférica. MÉTODOS: estudio retrospectivo, observacional, transversal, retrolectivo de cultivos nasales obtenidos durante cuatro semanas. La relación con los hemocultivos se estableció mediante chi cuadrada; se calculó razón de momios.

  2. [Comparison of resting energy expenditure determined by indirect calorimetry and estimated by predictive formulas in women with obesity degrees I to III].

    PubMed

    Parra-Carriedo, Alicia; Cherem-Cherem, Loren; Galindo-De Noriega, Daniela; Díaz-Gutiérrez, Mary Carmen; Pérez-Lizaur, Ana Bertha; Hernández-Guerrero, César

    2013-01-01

    Introducción: La determinación del gasto energético en reposo (GER) se calcula cotidianamente a partir de fórmulas predictivas aunque el resultado varía dependiendo de la población. Objetivo: Comparar la determinación del GER mediante calorimetría indirecta y mediante las ecuaciones Harris-Benedict (HB), Mifflin (MF), Organización Mundial de la Salud (OMS), «Institute of Medicine» (IOM), Fórmula Rápida (FR) y Valencia (VA) en mujeres con grados de obesidad I a III. Métodos: Mujeres adultas mestizas mexicanas se incluyeron en el estudio y formaron 3 grupos a partir del índice de masa corporal (IMC). Obesidad grado I (IMC 30,0-34,9; n = 42), grado II (IMC 35,0-39,9; n = 38) y grado III (IMC > 40; n = 41). Se determinó el GER mediante calorimetría indirecta y mediante las ecuaciones antes señaladas. ANOVA de Kruskal-Wallis y la prueba de Dunn se emplearon para el análisis estadístico (p < 0,05 se aceptó como diferencia). Resultados: No se observó diferencia estadística entre los valores de las fórmulas HB, OMS y VA respecto a la CI. La concordancia obtenida de dichas fórmulas fue 63%, 67% y 64%, respectivamente, al analizar los datos en un solo grupo de obesidad. Asimismo, las fórmulas IOM, ER y MF mostraron diferencia estadística significativa versus la CI, siendo la concordancia 58%, 53% y 54%, respectivamente. En el grado III de obesidad la concordancia de VA (78%) y FR (71%) fue la mayor obtenida. Discusión: Las fórmulas HB, OMS y VA fueron las mejores para estimar el GER en mujeres mexicanas con IMC>30. En el grado III VA y FR muestran el mejor desempeño.

  3. Swinging Over the Water Hole

    DTIC Science & Technology

    2011-06-01

    de una cuerda en el borde de un agujero de agua en x = 0, oscilando hacia arriba, y suelta la cuerda en algunos momentos, volando libremente por el...aire hasta que se sumerge en el agua en x = 0. Para pequeñas velocidades iniciales, el máximo rango de R se obtiene mediante la liberación de la...cuerda justo por debajo de su punto de inflexión y cayendo casi en línea recta hacia abajo en el agua desde el reposo. Por otra parte, como la velocidad

  4. Nonlinear Burning Stability of Solid Propellants.

    DTIC Science & Technology

    1983-12-31

    irreversible gasification processes (pyrolysis). d) Gas Phase. 1. Semi-infinite column of gas. 2. Mixture of thermally perfect gases of average molecular weight...Stazionaria di Regressione per Propellenti Solidi mediante Tecnica Ot- tica Laser", Master’s Thesis in Mechanical Engineering, Dipartimento di...thermal diffusivity,o% 1.400 E-03 cyn2/s Gas thermal conductivity, k 1.000 E-04 cal/cm K s Average product molecular w0igt, w 2.600 E+01 g/mole Optical

  5. [The quality of a scientific publication is the product of a sum of efforts and attributes].

    PubMed

    Espinosa-Larrañaga, Francisco

    2017-01-01

    Todo editor de una publicación médica científica busca que la revista que edita tenga o se reconozca con calidad. La calidad se logra mediante la participación de un conjunto de profesionales (editores, autores, revisores, impresores, diseñadores e incluso lectores) y los resultados de su participación profesional agregan, durante el proceso, propiedades con la finalidad de que el producto, una publicación médica científica, sea valorada por su calidad.

  6. Código árbol paralelizado para simulaciones astrofísicas. Experimentos de encuentros de galaxias compuestas

    NASA Astrophysics Data System (ADS)

    Viturro, H. R.; Carpintero, D. D.

    Se describe la implementación de un código árbol octal paralelizado desarrollado por los autores. Este código permite la integración del problema de N--cuerpos simultáneamente en varias computadoras (``cluster''), lo que permite desarrollar altas velocidades de cálculo. Se muestran los resultados de algunas integraciones de encuentros entre galaxias de disco con bulbo y halo, generadas mediante algoritmos no utilizados hasta el momento en este campo.

  7. [Rescue treatment in acute thrombosis of intracranial stents].

    PubMed

    Pumar, José M; Banguero, Alexandra; Arias-Rivas, Susana; Blanco, Miguel; Rodríguez-Yáñez, Manuel; Sucasas, Paula; Blanco, Miguel; Castiñeira-Mourenza, José A; Vázquez-Herrero, Fernando

    2014-02-01

    Introduccion. La trombosis aguda intrastent es una complicacion potencialmente grave en el stenting intracraneal. Es primordial determinar cual es la terapia mas adecuada en las trombosis intrastent. Caso clinico. Mujer de 58 años, el primer caso de trombosis aguda de un stent intracraneal, que fue tratada con exito mediante fibrinolisis tras la implantacion de un dispositivo diversificador de flujo (Silk) en un aneurisma basilar fusiforme. Conclusion. La administracion de abciximab como tratamiento de rescate parece segura en los casos de formaciones de trombos agudos intrastent.

  8. [Stimulation of the centromedian nucleus in refractory epilepsy associated to ring chromosome 20].

    PubMed

    Arévalo-Sáenz, Alejandra; Torres, Cristina V; Pastor, Jesús; Alonso-Cerezo, Concepción; Sola, Rafael G

    2015-06-16

    Introduccion. El sindrome del cromosoma 20 en anillo es una alteracion genetica infrecuente, con un diagnostico tardio. Caso clinico. Mujer de 43 años con epilepsia farmacorresistente desde los 6 años, tratada mediante estimulacion cerebral profunda del nucleo centromediano y con un cromosoma 20 en anillo. Conclusiones. Del estudio se extrae la conclusion de la inefectividad de la estimulacion cerebral profunda del nucleo centromediano en pacientes con cromosoma en anillo, pero se apunta la importancia de la caracterizacion genetica para el manejo de la epilepsia farmacorresistente.

  9. [Laparoscopic vs opened appendicovesicostomy in pediatric patients].

    PubMed

    Landa-Juárez, Sergio; Montes de Oca-Muñoz, Lorena Elizabeth; Castillo-Fernández, Ana María; de la Cruz-Yañez, Hermilo; García-Hernández, Carlos; Andraca-Dumit, Roxona

    2014-01-01

    Antecedentes: la apendicovesicostomía suele practicarse para facilitar el drenaje de orina por medio del cateterismo. La tendencia a ofrecer procedimientos menos invasivos a pacientes con vejiga neurogénica ha hecho de la laparoscopia una alternativa a la cirugía abierta, por sus ventajas de recuperación, menor tiempo de íleo postoperatorio, mejor cosmética, menor dolor postquirúrgico y reintegración temprana a la vida cotidiana. Objetivo: comparar los resultados de la apendicovesicostomía laparoscópica con la abierta. Material y métodos: estudio de cohorte, observacional, analítico, longitudinal, ambispectivo, que incluyó pacientes de 6 a 16 años, con diagnóstico de vejiga neurogénica, intervenidos mediante laparoscopia y cirugía abierta entre enero de 2009 y junio 2013, recuperándose la información de los expedientes clínicos. Resultados: seis pacientes se operaron mediante laparoscopia y 14 con cirugía abierta. El tiempo quirúrgico fue mayor en el grupo intervenido mediante laparoscopia, con una mediana de 330 minutos (300-360), en comparación con el abierto de 255 minutos (180-360), diferencia estadísticamente significativa. Siete pacientes del grupo abierto tuvieron complicaciones y solo 1 del grupo laparoscópico. La diferencia en la dosis de analgésicos y en el tiempo de su consumo fue estadísticamente significativa a favor del grupo intervenido mediante laparoscopia. El grado de continencia urinaria por la derivación fue mayor para el procedimiento laparoscópico (100%) que para el abierto (64%). Conclusiones: la apendicovesicostomía laparoscópica resultó una mejor alternativa para pacientes con vejiga neurogénica con parámetros urodinámicos de capacidad vesical y presión de punto de fuga dentro de valores aceptables.

  10. VALIDITY OF A FOOD-FREQUENCY QUESTIONNAIRE FOR ESTIMATING CALCIUM INTAKE IN ADOLESCENT SWIMMERS.

    PubMed

    Julián Almárcegui, Cristina; Huybrechts, Inge; Gómez Bruton, Alejandro; Matute Llorente, Ángel; González Agüero, Alejandro; Gómez Cabello, Alba; Moreno, Luis A; Casajús, Jose A; Vicente Rodríguez, Germán

    2015-10-01

    Introducción: estimar correctamente la ingesta de calcio es crucial para conocer cómo se distribuye nutricionalmente la ingesta calórica a lo largo del día. Por lo tanto, el objetivo del presente trabajo fue validar un cuestionario de frecuencia de consumo para calcular la ingesta de calcio, mediante dos recordatorios de 24 horas, usado como método de referencia en un grupo control de adolescentes normo-activos y un grupo de adolescentes nadadores de alta competición. Metodología: la congruencia de los cuestionarios se estudio mediante correlación de Pearson y el estudio del acuerdo entre los dos métodos a nivel individual, así como la habilidad del cuestionario para clasificar a los sujetos en el mismo cuartil que los recordatorios de 24 horas. Resultados: la ingesta media diaria de calcio del grupo control fue 564,6 mg (DE 232,0) y 895,9 mg (DE 343,1) calculada mediante el recordatorio de 24 horas y el cuestionario, respectivamente (P < 0.001); y 731,9 mg (DE 299,8) y 979,8 mg (DE 408,5) en los nadadores mediante el recordatorio de 24 horas y el cuestionario, respectivamente (P < 0.001). Las correlaciones de Pearson fueron 0,52 para el grupo control y 0,47 para los nadadores después de corregir por intravariablidad. Los análisis de clasificación indicaron que el 73,7% de los controles y el 63,1% de los nadadores fueron clasificados correctamente o en la categoría contigua. El 89% de los controles y el 79% de los nadadores fueron clasificados correctamente según estuvieran por encima o por debajo de las recomendaciones de ingesta de calcio diarias (1.300 mg). Conclusiones: para ambos grupos, el cuestionario de frecuencia de consumo tiende a sobreestimar la ingesta de calcio, sin embargo demuestra ser un buen método para clasificar tanto a los sujetos de ingestas de calcio extremas, como a los sujetos que no cumplen las recomendaciones de calcio.

  11. Squamous cell carcinoma and pilonidal cyst disease.

    PubMed

    Esposito, Francesco; Lauro, Mario; Tirone, Lucio Pasquale; Festa, Rosa Maria; Peluso, Gaia; Mazzoni, Giada; Scognamiglio, Marco; Grimaldi, Simona; Fresini, Antonio

    2015-02-20

    Il carcinoma a cellule squamose insorgente su malattia del seno pilonidale è una patologia abbastanza rara che sopraggiunge in presenza di malattia con decorso decennale. È caratterizzato da una crescita lenta ma da un’elevata invasività locale. Gli autori riportano il caso di un paziente di 63 anni con storia pluridecennale di malattia del seno pilonidale con ascessualizzazioni ricorrenti trattato chirurgicamente con resezione ampia e ricostruzione mediante uso di lembi. A distanza di 30 mesi non sono state osservate complicanze o recidive locali.

  12. Aplicación del método SAC a líneas de Fe II en atmósferas extendidas de estrellas Be

    NASA Astrophysics Data System (ADS)

    Arias, M. L.; Zorec, J.; Cidale, L.; Morrell, N.; Friedjung, M.; Chauville, J.; Ballereau, D.

    En el presente trabajo hemos analizado las líneas de Fe II en emisión, para varios multipletes en el rango óptico, presentes en los espectros de un grupo de estrellas Be. Mediante la aplicación del método de curvas de autoabsorción (SAC), obtenemos una estimación del valor de los parámetros característicos de la región en la cual se forman dichas líneas, tales como temperatura de excitación, opacidad y dimensión.

  13. La Función de Luminosidad de las poblaciones de cúmulos globulares alrededor de NGC 1399

    NASA Astrophysics Data System (ADS)

    Ostrov, P. G.; Forte, J. C.; Geisler, D.

    Mediante el empleo de una técnica especial para filtrar el pattern de fringing, se ha obtenido una función de luminosidad de los cúmulos globulares de NGC 1399 superando por ~ 1 mag el turn-over en la banda T1 del sistema de Washington. El análisis de los resultados de la fotometría multibanda (C, M, T1) permite determinar que las mitades mas brillantes de las funciones de luminosidad de las dos principales poblaciones de cúmulos globulares asociadas con esta galaxia son similares.

  14. Velocidades radiales de estrellas gigantes rojas y blue stragglers en cúmulos abiertos

    NASA Astrophysics Data System (ADS)

    González, J. F.; Lapasset, E.

    Se presentan mediciones de las estrellas más brillantes en los campos de los cúmulos abiertos NGC 6530, NGC 2516, NGC 3114, Cr 223 y NGC 2437. Mediante correlaciones cruzadas se obtiene la velocidad de unas 25 gigantes rojas con el objeto de derivar la velocidad media de cada asociación. En base a los espectros obtenidos de los blue stragglers se discuten sus principales características y su probabilidad de pertenencia. Finalmente, se presentan las observaciones para cinco nuevas binarias espectroscópicas detectadas.

  15. Microbiological testing of devices used in maintaining peripheral venous catheters.

    PubMed

    Rossini, Fernanda de Paula; Andrade, Denise de; Santos, Lissandra Chaves de Sousa; Ferreira, Adriano Menis; Tieppo, Caroline; Watanabe, Evandro

    2017-05-15

    ,3% Staphylococcus aureus e 14,3% Pseudomonas aeruginosa. Cinquenta e nove por cento das bactérias multirresistentes foram isoladas das T3Vs, 42% dos lúmens e 44% dos curativos com predominância de Staphylococcus coagulase-negativa resistente à meticilina. Além disso, 18% das bactérias gram-negativas com resistência aos carbapenêmicos foram identificadas a partir de bactérias multirresistentes nas superfícies externas das T3Vs. é importante enfatizar o isolamento de Staphylococcus coagulase-negativa resistente à meticilina e bactérias gram-negativas resistentes aos carbapenêmicos em amostras de dispositivos, o que reforça a importância do cuidado de enfermagem na manutenção do ambiente biologicamente seguro, assim como práticas de prevenção e controle de infecção. evaluar el uso de catéteres venosos periféricos basado en el análisis microbiológico de dispositivos (vendajes y llaves de tres vías) y así contribuir a la prevención y control de infecciones. se trata de un estudio prospectivo de análisis microbiológico de 30 llaves de tres vías (superficies externas y lumen) y 30 apósitos utilizados en el mantenimiento de los catéteres venosos periféricos de pacientes adultos hospitalizados. todas las superficies externas, el 40% de los lúmenes y el 86,7% de los vendajes presentaron crecimiento bacteriano. Las principales especies aisladas en el lumen fueron 50% Staphylococcus coagulasa-negativa, 14.3% Staphylococcus aureus, y 14.3% Pseudomonas aeruginosa. Cincuenta y nueve por ciento de las bacterias resistentes a múltiples fármacos fueron aisladas de las llaves de tres vías, el 42% de los lúmenes, y el 44% del apósito con un predominio de Staphylococcus coagulasa-negativa resistente a la meticilina. Además, se identificaron 18% de bacterias gram-negativas con resistencia a carbapenems entre las bacterias multirresistentes en las superficies externas de las llaves de tres vías. es importante enfatizar el aislamiento de Staphylococcus coagulasa

  16. [Auditing as a tool for ongoing improvement in the Stroke Care Plan of the Region of Aragon].

    PubMed

    Gimenez-Munoz, A; Palacin-Larroy, M; Bestue, M; Marta-Moreno, J

    2016-07-16

    Introduccion. El Plan de Atencion al Ictus de Aragon (PAIA) se creo en 2008 en el marco de la Estrategia Nacional en Ictus del Sistema Nacional de Salud. La monitorizacion de la atencion hospitalaria al ictus mediante auditorias periodicas se definio como una de sus lineas de trabajo. Objetivo. Determinar la calidad del proceso asistencial hospitalario prestado al paciente con ictus en Aragon mediante el uso de indicadores de calidad. Materiales y metodos. Se realizaron tres audits (en los años 2008, 2010 y 2012) siguiendo la misma metodologia, basada en la revision retrospectiva de una muestra representativa de ingresos por ictus en cada uno de los hospitales generales del Servicio Aragones de Salud. Se recogio informacion sobre 48 indicadores seleccionados segun su evidencia cientifica o relevancia clinica. Resultados. Se estudiaron 1.011 casos (331 en el primer audit, y 340 en el segundo y en el tercero). Treinta y un indicadores presentaron una mejoria significativa (entre ellos destacan los indicadores de calidad de la historia clinica, de evaluacion neurologica, las medidas preventivas iniciales y, con especial relevancia, la realizacion de test de deglucion), dos sufrieron empeoramiento (relacionados con el tratamiento rehabilitador) y 15 no registraron variaciones significativas. Conclusiones. La implantacion del PAIA ha supuesto una mejoria notable en la mayoria de los indicadores de calidad evaluados, reflejo de una mejora continua en la atencion hospitalaria del ictus. La generalizacion progresiva de la atencion especializada y la creacion de las areas de ictus son algunos de los factores determinantes.

  17. [Electronic prescription for Primary Care: a reliable tool to conceal medication at hospital admission?].

    PubMed

    Martín González, A; Abajo Del Álamo, C

    2013-01-01

    Objetivo: Analizar la fiabilidad de un programa de prescripción electrónica en receta de atención primaria (Medoracyl®) para conciliar la medicación al ingreso hospitalario. Método: Estudio prospectivo comparativo del tratamiento domiciliario validado de pacientes al ingreso, con el prescrito en Medoracyl®. La medicación al ingreso se obtuvo mediante entrevista clínica, informes médicos y revisión de la medicación aportada; la medicación activa en Medoracyl®, mediante consulta a la aplicación el día del ingreso. Se analizaron las discrepancias entre ambos tratamientos. Resultados Se incluyeron 47 pacientes con 273 líneas de tratamiento domiciliario validado y 274 líneas de tratamiento Medoracyl ®. Resultaron 48/273 líneas discrepantes (17,6% [IC95%: 13,1-21,6]). Se consideraron justificadas 27/48, resultando un riesgo final de no concordancia del 7,8% [IC95%: 4,6-11,0]. Conclusiones: Medoracyl® es una herramienta útil y de fácil acceso que permite conocer más del 90% de la medicación domiciliaria de los pacientes.

  18. [Cognitive Reserve Scale: testing the theoretical model and norms].

    PubMed

    Leon-Estrada, I; Garcia-Garcia, J; Roldan-Tapia, L

    2017-01-01

    Introduccion. La teoria de la reserva cognitiva contribuiria a explicar las diferencias en el rendimiento intelectual en sujetos con deterioro cognitivo similar y en sujetos sanos. Sin embargo, son necesarios mas datos psicometricos que garanticen el uso de los instrumentos de medicion de reserva cognitiva. Objetivo. Aportar evidencias de validez respecto a la estructura interna de la escala de reserva cognitiva (ERC) y establecer un baremo de referencia para la interpretacion de sus puntuaciones. Sujetos y metodos. Un total de 172 sujetos completaron la ERC y fueron distribuidos en dos grupos en funcion de la edad: 36-64 años (n = 110) y 65-88 años (n = 62). Resultados. El analisis factorial mediante modelos de ecuaciones estructurales exploratorios indico un moderado ajuste de los datos al modelo propuesto. En general, los indices de discriminacion fueron correctos (entre 0,21 y 0,50), y se registro congruencia entre los items a lo largo de los periodos de juventud, adultez y madurez para ambos grupos de edad. Se observaron valores adecuados del indice de fiabilidad (alfa de Cronbach: 0,80) y de los errores tipicos de medida (media: 51,40 ± 11,11). Conclusiones. La ERC se enmarcaria dentro del modelo teorico hipotetizado y las puntuaciones podrian interpretarse mediante el baremo ofrecido, lo que avalaria su empleo en la investigacion en este campo.

  19. [Cognitive stimulation in children with cerebral palsy].

    PubMed

    Muriel, V; Garcia-Molina, A; Aparicio-Lopez, C; Ensenat, A; Roig-Rovira, T

    2014-11-16

    Introduccion. La paralisis cerebral a menudo cursa con deficits cognitivos de atencion, visuopercepcion, funciones ejecutivas y memoria de trabajo. Objetivo. Analizar el efecto de un tratamiento de estimulacion cognitiva sobre las capacidades cognitivas en niños con pa­ralisis cerebral. Pacientes y metodos. Muestra de 15 niños con paralisis cerebral, con una edad media de 8,80 ± 2,51 años, clasificados mediante el Gross Motor Function Classification System (GMFCS) en nivel I (n = 6), nivel II (n = 4), nivel III (n = 2) y nivel V (n = 3). Los deficits cognitivos se evaluaron mediante la escala de inteligencia de Wechsler para niños (WISC-IV) y el Continuous Performance Test (CPT-II). Se administraron los cuestionarios para padres y profesores del Behavior Rating Inventory of Executive Function (BRIEF) y las escalas de evaluacion de Conners (CPRS-48 y CTRS-28). Se realizo un programa de estimulacion cognitiva dos horas semanales durante ocho semanas. Resultados. Se observaron diferencias estadisticamente significativas tras aplicar el tratamiento de estimulacion cognitivo en el indice de razonamiento perceptivo de la WISC-IV. No se obtuvieron diferencias antes y despues del tratamiento en las puntuaciones del Conners y del BRIEF. Tampoco se hallaron diferencias en los resultados de la WISC-IV en funcion del sexo ni en el GMFCS. Conclusion. El rendimiento cognitivo de los niños con paralisis cerebral mejora tras la aplicacion de un programa de rehabilitacion cognitiva.

  20. [Effectiveness of functional electrical stimulation in stroke patients: a systematic review].

    PubMed

    Romera-De Francisco, L; Jimenez-Del Barrio, S

    2016-08-01

    Introduccion. La electroestimulacion funcional es una de las tecnicas fisioterapicas empleadas en la actualidad para el abordaje de los pacientes que han sufrido un ictus. Objetivo. Conocer la efectividad de la electroestimulacion funcional en las capacidades generales, la marcha y la calidad de vida de los pacientes con ictus mediante una revision sistematica. Como objetivo secundario se planteo conocer el mejor metodo de aplicacion de esta tecnica. Pacientes y metodos. Se ha realizado una busqueda bibliografica en las bases de datos Medline, PEDro y Biblioteca Cochrane. Se han incluido ensayos clinicos y revisiones sistematicas de los ultimos cinco años que valorasen la efectividad de la electroestimulacion funcional en pacientes tras sufrir un ictus. Resultados. Se incluyeron 10 ensayos clinicos y una revision sistematica con metaanalisis, de los cuales se extrajeron los datos mas relevantes, se analizaron y se compararon. Conclusiones. La electroestimulacion funcional puede ayudar en la mejora de la calidad de vida, las capacidades motoras y la funcionalidad de la marcha en pacientes que han sufrido un ictus. No se puede afirmar que por si sola aporte mejores resultados que otras tecnicas convencionales de fisioterapia, y se observa una mayor efectividad con la aplicacion de electroestimulacion funcional asociada a otras tecnicas de fisioterapia. El mejor abordaje de la aplicacion con electroestimulacion funcional es el realizado en mas de un grupo muscular, desencadenando los impulsos mediante movimientos activos y en combinacion con otras intervenciones fisioterapicas.

  1. [Not Available].

    PubMed

    Fernández Castillo, Rafael; Cañadas de la Fuente, Gustavo R; Cañadas de la Fuente, Guillermo A; De la Fuente Solana, Emilia Inmaculada; Esteban de la Rosa, Rafael José; Bravo Soto, Juan

    2016-07-19

    Introducción: la obesidad y el sobrepeso presentan efectos adversos sobre la salud, lo que contribuye a la aparición de enfermedades metabólicas y cardiovasculares que ponen en peligro la integridad del injerto.Objetivo: investigar la influencia del IMC pretrasplante renal sobre el funcionamiento del injerto renal al año de trasplante mediante el estudio de cuatro métodos distintos de medir la filtración glomerular.Material y métodos: en este trabajo se ha seguido a 1.336 pacientes de ambos sexos trasplantados renales; se les realizaron mediciones pretrasplante y postrasplante de parámetros bioquímicos, mediciones antropométricas y función renal mediante medidas de filtrado glomerular.Resultados: a mayor índice de masa corporal pretrasplante se produce una disminución del filtrado glomerular medido por cuatro métodos distintos, así como mayor porcentaje de rechazos.Conclusiones: un IMC elevado pretrasplante contribuye a la disfunción del injerto, a una disminución del filtrado glomerular y a complicaciones del injerto en el primer año postrasplante.

  2. Assessment of the reliability and consistency of the "malnutrition inflammation score" (MIS) in Mexican adults with chronic kidney disease for diagnosis of protein-energy wasting syndrome (PEW).

    PubMed

    González-Ortiz, Ailema Janeth; Arce-Santander, Celene Viridiana; Vega-Vega, Olynka; Correa-Rotter, Ricardo; Espinosa-Cuevas, María de Los Angeles

    2014-10-04

    Antecedentes: El síndrome de desgaste proteínico-energético (DPE) se refiere a una condición de desnutrición, inflamación, anorexia, y emaciación de reservas corporales resultante de las condiciones inflamatorias y no inflamatorias que prevalecen en pacientes con enfermedad renal crónica (ERC).Una forma ampliamente descrita en la literatura para evaluar el DPE es el Malnutrition Inflamation Score (MIS). Objetivo: Valorar la fiabilidad y consistencia del MIS en adultos mexicanos con ERC en Hemodiálisis (HD) para Diagnóstico de DPE. Métodos: Estudio de pruebas diagnósticas. Se analizó una muestra de 45 adultos con ERC en HD, Durante el periodo Junio-Julio 2014. El instrumento se aplicó en 2 ocasiones, la fiabilidad test-retest se calculó mediante el Coeficiente de correlación Intraclase (CCI), la consistencia interna del cuestionario se analizó mediante el Coeficiente de Cronbach. Se calculó una prueba de Kappa ponderada para estimar la validez del instrumento, posteriormente se comparó con el índice nutricional de Bilbrey (IB). Resultados: La fiabilidad entre cuestionarios valorada en la muestra de pacientes fue de CCI = 0.829. La concordancia entre observaciones MIS es considerada como adecuada = 0.585 (p.

  3. Actividad funcional cerebral en estado de reposo: REDES EN CONEXIÓN

    PubMed Central

    Proal, Erika; Alvarez-Segura, Mar; de la Iglesia-Vayá, Maria; Martí-Bonmatí, Luis; Castellanos, F. Xavier

    2015-01-01

    Resumen El análisis de la conectividad funcional mediante resonancia magnética funcional (RMf) puede llevarse a cabo durante la realización de una tarea, la percepción de un estímulo o en estado de reposo. Estos análisis han demostrado su fiabilidad y reproducibilidad con diferentes enfoques (matemáticos, estadísticos, físicos) para seleccionar los vóxeles activados. El estudio de la señal de baja frecuencia en la actividad cerebral a través del contraste BOLD en estado de reposo ha revelado patrones de actividad cortical sincronizados, permitiendo describir la arquitectura funcional intrínseca del cerebro humano. La comunidad científica internacional dispone de recursos compartidos que contribuirán mediante este análisis de RMf en estado de reposo a la obtención de diagnósticos y tratamientos más precisos y avanzados en el campo de las neurociencias. PMID:21365601

  4. [Healthcare management of an epilepsy clinic: factors involved in the demand for health care and clinical situation of patients].

    PubMed

    García-Martín, Guillermina; Martín-Reyes, Guillermina; Dawid-Milner, Marc Stefan; Chamorro-Muñoz, M Isabel; Pérez-Errazquin, Francisco; Romero-Acebal, Manuel

    2013-05-16

    Introduccion. La epilepsia es una enfermedad cronica que implica un seguimiento periodico del paciente a largo plazo, lo que supone un aumento del numero de pacientes visitados con el tiempo y, por tanto, un coste al sistema sanitario. Objetivo. Determinar los factores implicados en el tiempo para la siguiente visita de un paciente epileptico. Pacientes y metodos. Seleccion de pacientes durante un ano que acuden consecutivamente a consulta de epilepsia de nuestro hospital. Se analiza su situacion clinica y relacion con el consejo medico dado, y los factores implicados en el tiempo transcurrido hasta la siguiente visita mediante modelos econometricos predictivos. Resultados. Existe una clara asociacion entre la situacion clinica del paciente y la modificacion del tratamiento propuesta por el neurologo en la visita anterior. Los factores implicados en el tiempo hasta la siguiente visita fueron frecuencia de crisis, efectos adversos medicamentosos, sobre todo los que afectan a la cognicion, y consejo medico al paciente. No resultaron significativos la politerapia, los trastornos psicoafectivos ni la situacion social del paciente. Conclusiones. El seguimiento en una consulta especifica de epilepsia mejora la situacion del paciente. Se trata del primer analisis de demanda asistencial en pacientes con epilepsia realizado mediante metodos econometricos y desde una perspectiva mixta medico-paciente. Dado que los factores que determinan el tiempo para la siguiente visita son modificables, podria disminuir el numero de visitas al ano, mejorando la situacion clinica de los pacientes. Proponemos una mayor duracion por visita para poder incidir en ello y reducir costes a largo plazo.

  5. [Gastrocolic fistula as a complication of percutaneous feeding gastrostomy, description of three cases and review of the literature].

    PubMed

    Jiménez Varo, Ignacio; Gros Herguido, Noelia; Parejo Campos, Juana; Tatay Domínguez, Dolores; Pereira Cunill, José Luis; Serrano Aguayo, Pilar; Socas Macías, María; García-Luna, Pedro Pablo

    2014-02-01

    Introducción: La gastrostomía percutánea es el procedimiento de elección para proporcionar acceso enteral en pacientes que requieren soporte nutricional por esta vía a largo plazo, relegando a la gastrostomía quirúrgica. Material y métodos: Presentamos tres pacientes con indicación de gastrostomía percutánea para soporte nutricional. En dos casos se realizó la gastrostomía mediante endoscopia y en otro mediante radiología intervencionista. Resultados: Durante la realización de las gastrostomías no se detectaron incidencias clínicas, pero al intentar recambio de las sondas de gastrostomía, se evidenció la presencia de fístula gastrocólica que, ocasionaba imposibilidad del recambio en un caso, o cuadro de dolor abdominal y diarrea en los otros dos casos. Discusión: Pese a ser una técnica segura, la gastrostomía percutánea debe realizarse con una correcta selección de los pacientes para minimizar posibles complicaciones que puedan acontecer, como fístula gastrocólica, recomendando en casos dudosos la realización de prueba de imagen tipo TC (tomografía computerizada).

  6. [Efficacy of lisdexamphetamine to improve the behavioural and cognitive symptoms of attention deficit hyperactivity disorder: treatment monitored by means of the AULA Nesplora virtual reality test].

    PubMed

    Diaz-Orueta, U; Fernandez-Fernandez, M A; Morillo-Rojas, M D; Climent, G

    2016-07-01

    Introduccion. La lisdexanfetamina (LDX) es el farmaco para el trastorno por deficit de atencion/hiperactividad (TDAH) con mayor volumen de investigacion de los ultimos años. No obstante, no hay estudios que certifiquen su utilidad para la mejoria del funcionamiento cognitivo en el TDAH. Objetivo. Evaluar la eficacia de la LDX en la mejora sintomatica conductual y cognitiva en un grupo de pacientes con TDAH. Dicha eficacia fue medida mediante la administracion del test AULA Nesplora de realidad virtual antes de la prescripcion del tratamiento farmacologico y despues del tratamiento con LDX. Pacientes y metodos. La muestra estaba compuesta por 85 pacientes de 6-16 años, con diagnostico clinico de TDAH y que asistian a tratamiento en una consulta de neuropediatria. Todos los pacientes iniciaron el tratamiento farmacologico con la correspondiente dosis de LDX tras la entrevista clinica y la primera administracion del test AULA. Tras un tratamiento medio de 7,5 meses, se les administro AULA nuevamente y se valoro el progreso del tratamiento farmacologico sobre la sintomatologia cognitiva y motora. Resultados. Se apreciaron mejorias muy significativas en la atencion selectiva y sostenida, la calidad del foco atencional y la hiperactividad, mejorias moderadas en la impulsividad, y una incidencia casi nula en la velocidad de procesamiento. Conclusiones. La LDX constituye un tratamiento adecuado para la mejora sustancial de la atencion e hiperactividad, y dicha mejora puede monitorizarse de forma precisa mediante el test de realidad virtual AULA.

  7. Rare case of isolated osteochondroma of the zygomatic bone: an endoscopic-assisted approach.

    PubMed

    Romano, Antonio; Dell'Aversana, Giovanni; Corvino, Raffaele; Abbate, Vincenzo; Iaconetta, Giorgio; Califano, Luigi

    2015-11-03

    L’osteocondroma è una neoplasia benigna che nel distretto cranio-facciale colpisce spesso il corpo ed il ramo mandibolare e soltanto di rado può interessare il processo coronoide e l’arco zygomatico. In questo articolo descriviamo un raro caso di osteocondroma isolato dell’osso zygomatico trattato mediante approccio chirurgico intraorale endoscopicamente assistito ed in letteratura non sono riportati altri casi di questa patologia trattati con procedure endoscopicamente assistite. Una donna caucasica di cinquantadue anni, è stata osservata nel nostro reparto nel mese di marzo del 2012, la paziente lamentava dolore in regione zygomatica destra. La tomografia computerizzata (TC) del distretto osseo interessato mostrava una lesione sessile non definita. Il sospetto diagnostico è stato di osteocondroma. L’intervento è stato realizzato in anestesia generale mediante approccio intraorale endoscopicamente assistito. All’esame istologico del campione operatorio è stata confermata la diagnosi di osteocondroma. Nell’immediato post operatorio la paziente non ha presentato edema, dolore o febbre. L’uso dell’endoscopia nel trattamento chirurgico di questa patologia quindi ha consentito di ottenere una maggiore precisione e una maggiore rispetto delle strutture anatomiche. L’approccio intraorale ci garantisce l’assenza di cicatrici visibili e l’ausilio dell’endoscopia ci consente di avere una migliore visione di tutte le strutture anatomiche, una buona gestione della patologia riducendo quindi il rischio di complicanze intraoperatorie quali: fratture patologiche e lesioni del VII nervo cranico.

  8. [Erythropoietin as a protective factor in rat CNS cells receiving radiotherapy -an in vitro study].

    PubMed

    Gomez-De la Riva, Álvaro; Isla-Guerrero, Alberto; García-Grande, Antonio

    2014-03-01

    Objetivo. Investigar el efecto de la eritropoyetina en cultivos celulares de corteza cerebral de ratas cuando se administra radioterapia. Materiales y metodos. El estudio se desarrolla con la obtencion de corteza cerebral de embriones de 17 dias de preñez de ratas Wistar. Las celulas cultivadas despues de 72 horas de la extraccion de la corteza se dividieron en dos grupos, a uno de ellos se le administro eritropoyetina alfa a una concentracion de 30 pM y el otro era el grupo control. A los dos grupos de celulas se les radio con 6 Gy mediante un aparato Phoenix. Tras la radioterapia permanecieron 24 horas en la incubadora antes de fijarlas. Las celulas fueron fijadas con formaldehido al 4%. A continuacion, con la tecnica de TUNEL, se valoro el numero de celulas apoptoticas en los cultivos radiados. Resultados. Se observo un porcentaje de apoptosis del 25,22% del grupo de cultivo sin eritropoyetina, mientras que en el grupo de celulas radiadas con eritropoyetina fue del 15,5%. Las variables cuantitativas se analizaron mediante el test t de Student y el resultado de la comparacion entre los dos grupos fue estadisticamente significativo (p < 0,0001). Conclusion. En nuestro modelo experimental in vitro se comprobo que la eritropoyetina es eficaz en la prevencion de la apoptosis en celulas del sistema nervioso central de ratas por radiacion. Esto abre nuevos campos para la investigacion del efecto protector del sistema nervioso.

  9. [Treatment of attention deficit hyperactivity disorder in adults using virtual reality through a mindfulness programme].

    PubMed

    Serra-Pla, J F; Pozuelo, M; Richarte, V; Corrales, M; Ibanez, P; Bellina, M; Vidal, R; Calvo, E; Casas, M; Ramos-Quiroga, J A

    2017-02-24

    Introduccion. El trastorno por deficit de atencion/hiperactividad (TDAH) es un trastorno del neurodesarrollo altamente prevalente, presenta una elevada comorbilidad con sintomatologia afectiva y ansiosa, afecta a la funcionalidad de la persona que lo padece, tienen una baja adhesion terapeutica y genera unos costes sociales y personales elevados. El mindfulness es un tratamiento psicologico que ha demostrado ser eficaz para el TDAH. La realidad virtual es un tratamiento altamente utilizado en fobias y extendido a otras patologias con resultados positivos. Objetivo. Desarrollar el primer tratamiento con realidad virtual y mindfulness para el TDAH en la edad adulta, que suponga un aumento en la adhesion terapeutica y reduzca costes. Pacientes y metodos. Estudio piloto de 25 pacientes tratados con realidad virtual, mediante cuatro sesiones de 30 minutos, y 25 mediante psicoestimulantes. Se tomaran medidas de evaluacion pretratamiento, postratamiento y postratamiento a los 3 y 12 meses, tanto de TDAH como de depresion, ansiedad, funcionalidad y calidad de vida. Se analizaran posteriormente con el programa SPSS v. 20 y se realizara un ANOVA de grupos independientes para ver las diferencias entre tratamientos y un test-retest para detectar el mantenimiento de los cambios. Resultados y conclusiones. Es necesaria la utilizacion de tratamientos que sean efectivos, supongan una reduccion en los costes y un aumento en la adhesion terapeutica. El tratamiento con realidad virtual se plantea como una alternativa a los tratamientos clasicos, que sea mas breve y atractiva para los pacientes.

  10. VLT 8.2-m Unit Telescope no. 1 (as on September 7, 1995)

    NASA Astrophysics Data System (ADS)

    1995-09-01

    ESO Press Photos 28-30/95; 13 September 1995 The construction of the ESO Very Large Telescope (VLT) advances rapidly, both in Europe and in Chile. These three photos show some of the main mechanical parts of the first 8.2-metre telescope, as they presented themselves in Milan (Italy) on Thursday, September 7, 1995. Two versions of these photos, one smaller and one larger and with better image resolution, are accessible for convenient transfer over the networks. The mechanical structure of VLT Unit Telescope no. 1 is now in the process of being mounted at the Ansaldo Energia premises in Milan (Italy). The so-called main structure (i.e., telescope azimuth and altitude mechanical structure, including hydrostatic bearing system, direct drives and direct mounted encoding system) was designed and is being built by the Italian consortium AES, composed of Ansaldo Energia (Genova), SOIMI (Milan) and EIE (Venice). Already two months from now, in November 1995, the complete, enormous mechanical structures of this telescope will be moving on the azimuth hydrostatic bearing tracks, using the direct drive system designed and built by the PHASE Company (Genova, Italy). The thorough testing phase will start by the end of December 1995 or at the beginning of January 1996. ESO Press Photo 28/95 [54K] [248K] shows the lower part of the azimuth structure of the telescope (the fork) on the concrete pier on which the azimuth tracks (hydrostatic bearing journal) are mounted. The very high accuracy of this enormous structure (compare with the persons in the photo!) is illustrated by the fact that the "run-out" of the azimuth axis of the fork has been measured as only 80 microns (0.08 millimetres) on 90 degrees turning angle. This is a remarkable result, especially since the centering of the axis is done on a radial journal with a diameter of no less than 9 metres. When the fork is equipped with all auxiliary systems, it will weigh about 320 t, will be 18 metres long and 8 metres wide. It

  11. All about FAX: a Female Adult voXel phantom for Monte Carlo calculation in radiation protection dosimetry

    NASA Astrophysics Data System (ADS)

    Kramer, R.; Khoury, H. J.; Vieira, J. W.; Loureiro, E. C. M.; Lima, V. J. M.; Lima, F. R. A.; Hoff, G.

    2004-12-01

    The International Commission on Radiological Protection (ICRP) has created a task group on dose calculations, which, among other objectives, should replace the currently used mathematical MIRD phantoms by voxel phantoms. Voxel phantoms are based on digital images recorded from scanning of real persons by computed tomography or magnetic resonance imaging (MRI). Compared to the mathematical MIRD phantoms, voxel phantoms are true to the natural representations of a human body. Connected to a radiation transport code, voxel phantoms serve as virtual humans for which equivalent dose to organs and tissues from exposure to ionizing radiation can be calculated. The principal database for the construction of the FAX (Female Adult voXel) phantom consisted of 151 CT images recorded from scanning of trunk and head of a female patient, whose body weight and height were close to the corresponding data recommended by the ICRP in Publication 89. All 22 organs and tissues at risk, except for the red bone marrow and the osteogenic cells on the endosteal surface of bone ('bone surface'), have been segmented manually with a technique recently developed at the Departamento de Energia Nuclear of the UFPE in Recife, Brazil. After segmentation the volumes of the organs and tissues have been adjusted to agree with the organ and tissue masses recommended by ICRP for the Reference Adult Female in Publication 89. Comparisons have been made with the organ and tissue masses of the mathematical EVA phantom, as well as with the corresponding data for other female voxel phantoms. The three-dimensional matrix of the segmented images has eventually been connected to the EGS4 Monte Carlo code. Effective dose conversion coefficients have been calculated for exposures to photons, and compared to data determined for the mathematical MIRD-type phantoms, as well as for other voxel phantoms.

  12. Recovery of different waste vegetable oils for biodiesel production: a pilot experience in Bahia State, Brazil.

    PubMed

    Torres, Ednildo Andrade; Cerqueira, Gilberto S; Tiago, M Ferrer; Quintella, Cristina M; Raboni, Massimo; Torretta, Vincenzo; Urbini, Giordano

    2013-12-01

    In Brazil, and mainly in the State of Bahia, crude vegetable oils are widely used in the preparation of food. Street stalls, restaurants and canteens make a great use of palm oil and soybean oil. There is also some use of castor oil, which is widely cultivated in the Sertão Region (within the State of Bahia), and widely applied in industry. This massive use in food preparation leads to a huge amount of waste oil of different types, which needs either to be properly disposed of, or recovered. At the Laboratorio Energia e Gas-LEN (Energy & Gas lab.) of the Universidade Federal da Bahia, a cycle of experiments were carried out to evaluate the recovery of waste oils for biodiesel production. The experiences were carried out on a laboratory scale and, in a semi-industrial pilot plant using waste oils of different qualities. In the transesterification process, applied waste vegetable oils were reacted with methanol with the support of a basic catalyst, such as NaOH or KOH. The conversion rate settled at between 81% and 85% (in weight). The most suitable molar ratio of waste oils to alcohol was 1:6, and the amount of catalyst required was 0.5% (of the weight of the incoming oil), in the case of NaOH, and 1%, in case of KOH. The quality of the biodiesel produced was tested to determine the final product quality. The parameters analyzed were the acid value, kinematic viscosity, monoglycerides, diglycerides, triglycerides, free glycerine, total glycerine, clearness; the conversion yield of the process was also evaluated.

  13. Variabilidade óptica de longo período e precessão de jato: o caso de BL Lacertae

    NASA Astrophysics Data System (ADS)

    Caproni, A.; Abraham, Z.

    2003-08-01

    Variabilidade é tipicamente uma característica de AGNs, sendo observada em toda a faixa eletromagnética. Em relação às escalas de tempo, variações desde horas até de algumas décadas foram encontradas por vários autores. Em alguns casos, análises temporais de curvas de luz mostram a existência de periodicidade nas variações observadas. Um exemplo de objeto que preenche as características mencionadas acima é BL Lacertae, o protótipo da classe BL Lac dos AGNs. Neste trabalho, nós interpretamos a variabilidade periódica de longo período detectada na curva de luz na banda B (~7,5 anos) como o resultado da periodicidade na amplificação da radiação oriunda do jato relativístico. Neste cenário, a amplificação periódica seria induzida pela precessão, que muda o ângulo entre o jato e a linha de visada. Com esta abordagem e vínculos adicionais fornecidos por observações em altas energias, nós podemos impor limites para os parâmetros do modelo de precessão, tais como o fator de Lorentz associado ao movimento global do jato, o ângulo de abertura do cone de precessão e o ângulo entre o eixo do cone e a linha de visada.

  14. Radiological Modeling for Determination of Derived Concentration Levels of an Area with Uranium Residual Material - 13533

    SciTech Connect

    Perez-Sanchez, Danyl

    2013-07-01

    As a result of a pilot project developed at the old Spanish 'Junta de Energia Nuclear' to extract uranium from ores, tailings materials were generated. Most of these residual materials were sent back to different uranium mines, but a small amount of it was mixed with conventional building materials and deposited near the old plant until the surrounding ground was flattened. The affected land is included in an area under institutional control and used as recreational area. At the time of processing, uranium isotopes were separated but other radionuclides of the uranium decay series as Th-230, Ra-226 and daughters remain in the residue. Recently, the analyses of samples taken at different ground's depths confirmed their presence. This paper presents the methodology used to calculate the derived concentration level to ensure that the reference dose level of 0.1 mSv y-1 used as radiological criteria. In this study, a radiological impact assessment was performed modeling the area as recreational scenario. The modelization study was carried out with the code RESRAD considering as exposure pathways, external irradiation, inadvertent ingestion of soil, inhalation of resuspended particles, and inhalation of radon (Rn-222). As result was concluded that, if the concentration of Ra-226 in the first 15 cm of soil is lower than, 0.34 Bq g{sup -1}, the dose would not exceed the reference dose. Applying this value as a derived concentration level and comparing with the results of measurements on the ground, some areas with a concentration of activity slightly higher than latter were found. In these zones the remediation proposal has been to cover with a layer of 15 cm of clean material. This action represents a reduction of 85% of the dose and ensures compliance with the reference dose. (authors)

  15. Fabrication and testing of U-7Mo monolithic plate fuel with Zircaloy cladding

    NASA Astrophysics Data System (ADS)

    Pasqualini, E. E.; Robinson, A. B.; Porter, D. L.; Wachs, D. M.; Finlay, M. R.

    2016-10-01

    Nuclear fuel designs are being developed to replace highly enriched fuel used in research and test reactors with fuels of low enrichment. In the most challenging cases, U-(7-10 wt%)Mo monolithic plate fuels are proposed. One of the considered designs includes aluminum-alloy cladding, which provides some challenges in fabrication and fuel/cladding interaction during service. Zircaloy cladding, specifically Zry-4, was investigated as an alternative cladding, and development of a fabrication method was performed by researchers with the Comisión Nacionalde Energia Atómica (CNEA) in Argentina, resulting in test fuel plates (Zry-4 clad U-7Mo) which were subsequently tested in the Advanced Test Reactor in Idaho. Because Zry-4 and U-(7-10)Mo have similar high-temperature mechanical properties, fabrication was simplified in that the fuel foil and cladding could be co-rolled and bonded. The challenge was to prevent a thermal-expansion mismatch, which could destroy the fuel/cladding bond before complete bonding was achieved; the solution was to prevent the composites from cooling significantly during or between roll passes. The final product performed very well in-reactor, showing good bonding, very little fuel/cladding interaction-either from fabrication or in-reactor testing-and little swelling, especially no detectable heterogeneous bubble formation at the fuel/cladding interface tested to a fission density of up to 2.7E+21 (average) fissions/cm3, 3.8E+21 (peak).

  16. International Space Station Data Collection for Disaster Response

    NASA Technical Reports Server (NTRS)

    Stefanov, William L.; Evans, Cynthia A.

    2015-01-01

    Roscosmos/Energia through the Urugan program.

  17. Simulation of tracer dispersion from elevated and surface releases in complex terrain

    NASA Astrophysics Data System (ADS)

    Hernández, J. F.; Cremades, L.; Baldasano, J. M.

    terrain (Ibarra, 1992, Energia, No. 1, 74-85).

  18. Evolution of International Space Station GN&C System Across ISS Assembly Stages

    NASA Technical Reports Server (NTRS)

    Lee, Roscoe; Frank, K. D. (Technical Monitor)

    1999-01-01

    The Guidance Navigation and Control (GN&C) system for the International Space Station is initially implemented by the Functional Cargo Block (FGB) which was built by the Khrunichev Space Center under direct contract to Boeing. This element (Stage 1A/R) was launched on 20 November 1998 and is currently operating on-orbit. The components and capabilities of the FGB Motion Control System (MCS) are described. The next ISS element, which has GN&C functionality will be the Service Module (SM) built by Rocket Space Corporation-Energia. This module is scheduled for launch (Stage 1R) in early 2000. Following activation of the SM GN&C system, the FGB MCS is deactivated and no longer used. The components and capabilities of the SM GN&C system are described. When a Progress vehicle is attached to the ISS it can be used for reboost operations, based on commands provided by the Mission Control Center-Moscow. When a data connection is implemented between the SM and the Progress, the SM can command the Progress thrusters for attitude control and reboosts. On Stage 5A, the U.S. GN&C system will become activated when the U.S. Laboratory is de loyed and installed (launch schedule is currently TBD). The U.S. GN&C system provides non-propulsive control capabilities to support micro-gravity operations and minimize the use of propellant for attitude control, and an independent capability for determining the ISS state vector, attitude, attitude rate. and time.. The components and capabilities of the U.S. GN&C system are described and the interactions between the U.S. and Russian Segment GN&C systems are also described.

  19. All about FAX: a Female Adult voXel phantom for Monte Carlo calculation in radiation protection dosimetry.

    PubMed

    Kramer, R; Khoury, H J; Vieira, J W; Loureiro, E C M; Lima, V J M; Lima, F R A; Hoff, G

    2004-12-07

    The International Commission on Radiological Protection (ICRP) has created a task group on dose calculations, which, among other objectives, should replace the currently used mathematical MIRD phantoms by voxel phantoms. Voxel phantoms are based on digital images recorded from scanning of real persons by computed tomography or magnetic resonance imaging (MRI). Compared to the mathematical MIRD phantoms, voxel phantoms are true to the natural representations of a human body. Connected to a radiation transport code, voxel phantoms serve as virtual humans for which equivalent dose to organs and tissues from exposure to ionizing radiation can be calculated. The principal database for the construction of the FAX (Female Adult voXel) phantom consisted of 151 CT images recorded from scanning of trunk and head of a female patient, whose body weight and height were close to the corresponding data recommended by the ICRP in Publication 89. All 22 organs and tissues at risk, except for the red bone marrow and the osteogenic cells on the endosteal surface of bone ('bone surface'), have been segmented manually with a technique recently developed at the Departamento de Energia Nuclear of the UFPE in Recife, Brazil. After segmentation the volumes of the organs and tissues have been adjusted to agree with the organ and tissue masses recommended by ICRP for the Reference Adult Female in Publication 89. Comparisons have been made with the organ and tissue masses of the mathematical EVA phantom, as well as with the corresponding data for other female voxel phantoms. The three-dimensional matrix of the segmented images has eventually been connected to the EGS4 Monte Carlo code. Effective dose conversion coefficients have been calculated for exposures to photons, and compared to data determined for the mathematical MIRD-type phantoms, as well as for other voxel phantoms.

  20. Uvby-B Photometry of High Velocity Stars. Photometric Parallaxes and Preliminary Kinematic Results

    NASA Astrophysics Data System (ADS)

    Schuster, W. J.

    1990-11-01

    RESUMEN. Se han explorado dos metodos para la determinaci6n de paralajes fotometricos usando fotometrfa uv - . Estos metodos dependen de las relaciones estandar de Crawford (1975) y de Olsen (1984) y de colores y magnitudes sinteticas de VandenBerg y Bell (1985). Ambos metodos incluyen una correcci6n evolucionaria de forma f6c0. Se calculan las distancias para las 711 estrellas de alta velocidad y pobres en metales en el catalogo uvby-p de Schuster y Nissen (1988). Se comparan estas con las distancias de Sandage y Fouts (1987) y Laird, Carney y Latham (1988) para las estrellas en comtfin. Tambien son aplicables nuestros metodos a estrellas de paralaje. En general las comparaciones son satisfactorias y las sistematicas son despreciables o pequefias. Las distancias finales de nuestras 711 estrellas se aplican a un numero de problemas cinematicos. Se estudian algunos diagramas interesantes, tales como el diagrama de energia de Toomre y el diagrama V(rot) versus [Fe/H]. ABSTRACT Two methods for the determination of parallaxes using uvbyP photometry are being explored. These methods depend upon the standard relations of Crawford (1975) and of Olsen (1984) and upon synthetic colors and magnitudes of VandenBerg and Bell (1985). Both include an evolutionary correction of the form f6c0. Distances are calculated for the 711 high-velocity and metal-poor stars in the uvby-P catalogue of Schuster and Nissen (1988). These are compared to the distances of Sandage and Fouts (1987) and Laird, Carney, and Lathain (1988) for stars in common. Also our methods are applied to parallax stars. In general the comparisons are good with negligible or small systematic differences. The final distances of our 711 stars are applied to a number of kinematical problems. Several interesting diagrams are studied, sucl as Toomre energy diagram and the plot of V(rot) versus [Fe/H]. Key words: DISTANCES - PHOTOMETRY - STARS-POPULATION II

  1. Steam turbine vibration diagnostic system based on neural hologram

    SciTech Connect

    Parenti, R.; Penno, C.; Perotti, F.; Rebizzo, A.; Ronconi, D.

    1998-07-01

    The problem of condition monitoring of large rotating machines is well known by technicians working in the field of Energy. To record and analyze the vibration data coming from sensors properly mounted on the bearings of the machine is a common practice. Those data are usually processed by FFT and get available as Amplitude and Phase values individually for the all significant harmonics, which are multiple values of the rotor speed. From the analysis of these data, various malfunctions and/or incoming mechanical problems can be recognized, even if there are two main problems connected with data processing and analysis: (1) this kind of operation continuously requires a very large amount of data: for instance, on a typical steam turbine set, 5 signals are read for every bearing; at least 3 harmonics are evaluated in amplitude and phase for each bearing every second; due to the fact that a typical turbine of this size can have at least 5 bearings continuously monitored, the amount of data to manage should be about 576,000 per hour; (2) so far there are no intelligent methods to automatically control the actual behavior of the machine and to compare it with some reference statuses, in order to ask the operator for some corrective actions and/or a more detailed analysis of the data. An innovative method, based on Neural Networks, has been developed jointly by Ansaldo Ricerche and Ansaldo Energia. On the basis of the different steady-state working points: (1) a database is implemented with the data recorded from the field (thanks to the implicit posterior observation) when the behavior of the machine and the vibration phenomena problems are recognized as normal; (2) starting from the data stored in the database, a neural multi-dimensional hologram is then synthesized; (3) an automatic system compares continuously the values read from the field with those evaluated by the neural estimation.

  2. Space Logistics: Launch Capabilities

    NASA Technical Reports Server (NTRS)

    Furnas, Randall B.

    1989-01-01

    The current maximum launch capability for the United States are shown. The predicted Earth-to-orbit requirements for the United States are presented. Contrasting the two indicates the strong National need for a major increase in Earth-to-orbit lift capability. Approximate weights for planned payloads are shown. NASA is studying the following options to meet the need for a new heavy-lift capability by mid to late 1990's: (1) Shuttle-C for near term (include growth versions); and (2) the Advanced Lauching System (ALS) for the long term. The current baseline two-engine Shuttle-C has a 15 x 82 ft payload bay and an expected lift capability of 82,000 lb to Low Earth Orbit. Several options are being considered which have expanded diameter payload bays. A three-engine Shuttle-C with an expected lift of 145,000 lb to LEO is being evaluated as well. The Advanced Launch System (ALS) is a potential joint development between the Air Force and NASA. This program is focused toward long-term launch requirements, specifically beyond the year 2000. The basic approach is to develop a family of vehicles with the same high reliability as the Shuttle system, yet offering a much greater lift capability at a greatly reduced cost (per pound of payload). The ALS unmanned family of vehicles will provide a low end lift capability equivalent to Titan IV, and a high end lift capability greater than the Soviet Energia if requirements for such a high-end vehicle are defined.In conclusion, the planning of the next generation space telescope should not be constrained to the current launch vehicles. New vehicle designs will be driven by the needs of anticipated heavy users.

  3. Atmospheric environmental implications of propulsion systems

    SciTech Connect

    Mcdonald, A.J.; Bennett, R.R.

    1995-03-01

    Three independent studies have been conducted for assessing the impact of rocket launches on the earth`s environment. These studies have addressed issues of acid rain in the troposphere, ozone depletion in the stratosphere, toxicity of chemical rocket exhaust products, and the potential impact on global warming from carbon dioxide emissions from rocket launches. Local, regional, and global impact assessments were examined and compared with both natural sources and anthropogenic sources of known atmospheric pollutants with the following conclusions: (1) Neither solid nor liquid rocket launches have a significant impact on the earth`s global environment, and there is no real significant difference between the two. (2) Regional and local atmospheric impacts are more significant than global impacts, but quickly return to normal background conditions within a few hours after launch. And (3) vastly increased space launch activities equivalent to 50 U.S. Space Shuttles or 50 Russian Energia launches per year would not significantly impact these conclusions. However, these assessments, for the most part, are based upon homogeneous gas phase chemistry analysis; heterogeneous chemistry from exhaust particulates, such as aluminum oxide, ice contrails, soot, etc., and the influence of plume temperature and afterburning of fuel-rich exhaust products, need to be further addressed. It was the consensus of these studies that computer modeling of interactive plume chemistry with the atmosphere needs to be improved and computer models need to be verified with experimental data. Rocket exhaust plume chemistry can be modified with propellant reformulation and changes in operating conditions, but, based upon the current state of knowledge, it does not appear that significant environmental improvements from propellant formulation changes can be made or are warranted.

  4. A fonte ionizante do disco de acreção no núcleo de NGC1097

    NASA Astrophysics Data System (ADS)

    Silva, R. N.; Storchi-Bergmann, T.

    2003-08-01

    Observações em raios-X revelam o "coração" dos núcleos ativos de galáxias, pois esse tipo de radiação provém das suas regiões mais internas, próximas ao buraco negro central. Neste trabalho apresentamos observações em raios-X da região central da galáxia NGC1097, que hospeda um buraco negro supermassivo e um disco de acreção cuja emissão vem sendo observada há dez anos através da linha de emissão Ha larga (10000 km/s) e de duplo pico. As observações em raios-X - que foram obtidas com o Telescópio Chandra - foram combinadas com observações no ultravioleta obtidas com o Telescópio Espacial Hubble e são usadas para estudar as características da fonte central que ioniza o disco de acreção. A distribuição espectral de energia é comparada com a predita por modelos, em particular o de uma estrutura "ADAF" ("advection dominated accretion flow") na parte interna do disco. Tal estrutura produz um espectro de emissão de linhas estreitas tipo LINER, como observado em NGC1097 e em rádio-galáxias que apresentam linhas de Balmer largas de duplo pico. Apresentamos também uma comparação entre outros LINERs com linhas de emissão largas de duplo pico, disponíveis na literatura ou nos arquivos do Chandra e do Telescópio Espacial Hubble e discutimos as correspondentes implicações para modelos da fonte central.

  5. [Metabolic myopathies].

    PubMed

    Papazian, Óscar; Rivas-Chacón, Rafael

    2013-09-06

    Objetivo. Revisar las miopatias metabolicas manifestadas solamente por crisis de mialgias, calambres y rigidez musculares con dificultad para contraer los musculos afectados y el examen neurologico normal entre las crisis en niños y adolescentes. Desarrollo. Estas miopatias metabolicas se deben a deficits enzimaticos heredados en forma autosomica recesiva del metabolismo de los carbohidratos y lipidos. El resultado final es una reduccion del trifosfato de adenosina principalmente a traves de la fosforilacion oxidativa mitocondrial con disminucion de la energia disponible para la contraccion muscular. Las secundarias a trastornos del metabolismo de los carbohidratos se producen por ejercicios de alta intensidad y breves (< 10 min) y las secundarias a trastornos de los lipidos, por ejercicios de baja intensidad y prolongados (> 10 min). Los deficits enzimaticos en el primer grupo son de miofosforilasa (glucogenosis V), fosfofructocinasa muscular (glucogenosis VII), fosfoglicerato mutasa 1 (glucogenosis X) y beta enolasa (glucogenosis XIII), y en el segundo, de carnitina palmitol transferasa tipo II y de acil-CoA deshidrogenasa de cadena muy larga. Conclusiones. Las caracteristicas diferenciales de los pacientes en cada grupo y dentro de cada grupo permitiran el diagnostico clinico presuntivo inicial en la mayoria y solicitar solamente los examenes necesarios para corroborar el diagnostico. El tratamiento de las crisis consiste en hidratacion, glucosa y alcalinizacion de la orina. Las medidas preventivas son evitar el tipo de ejercicio que induce las crisis y el ayuno. No existe cura o tratamiento especifico. El pronostico es bueno con la excepcion de casos raros de insuficiencia renal aguda debido a la elevacion sanguinea de la mioglobina producto de una rabdomiolisis grave.

  6. Space Logistics: Launch Capabilities

    NASA Technical Reports Server (NTRS)

    Furnas, Randall B.

    1989-01-01

    The current maximum launch capability for the United States are shown. The predicted Earth-to-orbit requirements for the United States are presented. Contrasting the two indicates the strong National need for a major increase in Earth-to-orbit lift capability. Approximate weights for planned payloads are shown. NASA is studying the following options to meet the need for a new heavy-lift capability by mid to late 1990's: (1) Shuttle-C for near term (include growth versions); and (2) the Advanced Lauching System (ALS) for the long term. The current baseline two-engine Shuttle-C has a 15 x 82 ft payload bay and an expected lift capability of 82,000 lb to Low Earth Orbit. Several options are being considered which have expanded diameter payload bays. A three-engine Shuttle-C with an expected lift of 145,000 lb to LEO is being evaluated as well. The Advanced Launch System (ALS) is a potential joint development between the Air Force and NASA. This program is focused toward long-term launch requirements, specifically beyond the year 2000. The basic approach is to develop a family of vehicles with the same high reliability as the Shuttle system, yet offering a much greater lift capability at a greatly reduced cost (per pound of payload). The ALS unmanned family of vehicles will provide a low end lift capability equivalent to Titan IV, and a high end lift capability greater than the Soviet Energia if requirements for such a high-end vehicle are defined.In conclusion, the planning of the next generation space telescope should not be constrained to the current launch vehicles. New vehicle designs will be driven by the needs of anticipated heavy users.

  7. Analysis of shadowing effects on MIR photovoltaic and solar dynamic power systems

    SciTech Connect

    Fincannon, J.

    1995-05-01

    The NASA Lewis Research Center is currently working with RSC-Energia, the Russian Space Agency, and Allied Signal in developing a flight demonstration solar dynamic power system. This type of power system is dependent upon solar flux that is reflected and concentrated into a thermal storage system to provide the thermal energy input to a closed-cycle Brayton heat engine. The solar dynamic unit will be flown on the Russian Mir space station in anticipation of use on the International Space Station Alpha. By the time the power system is launched, the MIR will be a spatially complex configuration which will have, in addition to the three-gimbaled solar dynamic unit, eleven solar array wings that are either fixed or track the Sun along one axis and a variety or repositionable habitation and experiment modules. The proximity of arrays to modules creates a situation which makes it highly probable that there will be varying solar flux due to shadowing on the solar dynamic unit and some of the arrays throughout the orbit. Shadowing causes fluctuations in the power output from the arrays and the solar dynamic power system, thus reducing the energy capabilities of the spacecraft. An assessment of the capabilities of the power system under these conditions is an important part in influencing the design and operations of the spacecraft and predicting its energy performance. This paper describes the results obtained from using the Orbiting Spacecraft Shadowing Analysis Station program that was integrated into the Station Power Analysis for Capability Evaluation (SPACE) electrical power system computer program. OSSA allows one to consider the numerous complex factors for analyzing the shadowing effects on the electrical power system including the variety of spacecraft hardware geometric configurations, yearly and daily orbital variations in the vehicle attitude and orbital maneuvers.

  8. Grupos españoles de cálculos ab initio de moléculas de interés astrofísico

    NASA Astrophysics Data System (ADS)

    Yáñez, M.

    Pocos campos de la química están tan bien adaptados a la modelización por medio de los métodos teóricos de la Química Cuántica como la Astroquímica y la Química de la Atmósfera, donde las interacciones moleculares son, generalmente, lo suficientemente pequeñas para que el modelo de molécula aislada funcione muy bien. En España son varios los grupos teóricos que dedican su esfuerzo de investigación, o parte de él, al estudio de moléculas o procesos de interés en Astrofísica o en atmósferas planetarias. Presentaremos diferentes ejemplos paradigmáticos de esta actividad en la que se exploran desde aspectos estructurales, hasta aspectos espectroscópicos y dinámicos. Entre los últimos, cabe destacar estudios en los que se demuestra la importancia de procesos a dos estados, prohibidos por espín, en la formación astrofísica de diversos derivados de interés. En el tratamiento espectroscópico se han hecho esfuerzos interesantes, que han aunado teoría y experimento, en el estudio de sistemas relevantes desde el punto de vista atmosférico, como los hidratos de ácido nítrico, o el tratamiento espectroscópico de moléculas no rígidas. No menos interesantes son los estudios de fotoabsorción de radicales o de procesos multifotónicos. Son particularmente abundantes los estudios dedicados a la reactividad específica de sistemas de interés astrofísico o atmosférico, con el objetivo de esclarecer vías de formación de determinados compuestos o de proporcionar mecanismos que permitan identificar las etapas reactivas limitantes de reacciones de interés en esos medios y sobre los que no existía información previa. Así, por ejemplo, se han publicado interesantes estudios sobre la formación o propiedades de compuestos de fósforo, de silico o de azufre o sobre mecanismos de reacción en los que intervienen el ozono, el radical nitrato, el radical OH u otras especies. Finalmente, son también particularmente relevantes los estudios que varios

  9. [Not Available].

    PubMed

    San Mauro Martín, Ismael; Cevallos, Vanesa; Pina Ordúñez, Diana; Garicano Vilar, Elena

    2016-07-19

    Introducción: existen alteraciones frecuentes en la alimentación de la población infantil femenina, y especialmente en atletas de deportes estéticos por la presión ejercida para mantener un cuerpo.Objetivos: evaluar los aspectos nutricionales, antropométricos y la percepción del peso de niñas que realizan gimnasia rítmica frente a un grupo control.Métodos: estudio descriptivo comparativo. Se compararon 25 niñas gimnastas con 25 niñas no gimnastas (control). Se realizó una valoración antropométrica, mediante protocolo ISAK, y nutricional, mediante un registro dietético de siete días; así como una valoración cuantitativa y cualitativa de la ingesta alimentaria, mediante el software DIAL. Se rellenó un cuestionario de hábitos y sobre la percepción de su peso corporal.Resultados: los datos antropométricos no presentaron diferencias significativas entre ambos grupos, excepto en los pliegues cutáneos y el porcentaje de grasa, el cual era estadísticamente inferior en gimnastas. La ingesta energética (1.413 ± 283 Kcal/día) de las gimnastas era inferior a la recomendada por la Food and Nutrition Board de acuerdo a su edad. La distribución de los macronutrientes cumplía con los valores normales establecidos (10-30% proteínas, 45-65% hidratos, 20-35% grasas). El 32% de las gimnastas y el 36,4% de las niñas control consideraron que les gustaría pesar menos.Conclusión: teniendo en cuenta la intensa actividad de las gimnastas, sus requerimientos energéticos deberían ajustarse a ello, ya que esto contribuirá a su desarrollo y crecimiento y a una mejor ejecución del ejercicio. En la muestra estudiada, el consumo de alimentos de las gimnastas se aleja de una alimentación equilibrada. No se observaron comportamientos diferentes en la percepción del peso entre ambos grupos.

  10. [Assessing the profile and nutritional intake of an Ibero-American group of nutrition postgraduate students].

    PubMed

    Sumalla Cano, Sandra; Elío, Iñaki; Domínguez, Irma; Calderón, Rubén; García, Agueda; Fernández, Federico; Gracia, Santos; Dzul, Luis; Battino, Maurizio; Solano, Héctor Antonio

    2013-01-01

    Introducción: Los hábitos alimentarios tienen una gran influencia sobre la salud de las personas, por ello es de suma importancia profundizar en su estudio para comprobar su adaptación a las recomendaciones actuales y poder realizar políticas de educación nutricional y/o suplementación ajustadas a la realidad. Material y métodos: Estudio transversal descriptivo con la colaboración de estudiantes de postgrado. Los participantes se seleccionaron mediante muestreo no probabilístico accidental enviando vía mail la información del estudio, realizado mediante un cuestionario sobre sus características socio-demográficas y un registro dietético de 3 días. La muestra estuvo formada por n = 50 participantes. Los registros dietéticos de 3 días se valoraron con el software NutrIber y los datos obtenidos fueron tratados mediante el software estadístico SPSS 15. Resultados y discusión: El perfil de los estudiantes es de 80% mujeres y 20% hombres, con edad media de 33,7 ± 9,32 AÑOs, e índice de masa corporal de 22,91 ± 4,07. Todos los grupos presentan un consumo excesivo de proteínas y lípidos y deficitario en glúcidos. En cuanto a los micronutrientes es destacable que ningún grupo cubre las ingestas recomendadas de yodo, y que ningún grupo de mujeres cubre las recomendaciones de ingesta de fibra, ácido fólico ni hierro. Conclusiones: Son necesarios más estudios para confirmar los resultados hallado, sin embargo, se puede concluir que las poblaciones urbanas de Latinoamérica cada vez se acercan más al modelo de dieta occidental, rica en proteínas y grasas y pobre en glúcidos, fibra y micronutrientes, lo que es indicativo de dietas pobres en cereales integrales, frutas y verduras.

  11. [AGREEMENT BETWEEN INDIRECT CALORIMETRY AND PREDICTIVE EQUATIONS IN A SAMPLE OF SPANISH HEALTHY ADULTS].

    PubMed

    de la Cruz Marcos, Sandra; dee Mateo Silleras, Beatriz; Camina Martín, Ma Alicia; Carreño Enciso, Laura; Miján de la Torre, Alberto; Galgani, José E; Redondo del Río, Ma Paz

    2015-08-01

    Objetivo: estudiar la concordancia entre el gasto energético en reposo (GER) obtenido mediante calorimetría indirecta (CI), y las ecuaciones de estimación más utilizadas en población adulta sana española. Métodos: estudio transversal en el que se determinó el GER en 95 sujetos sanos con normopeso mediante calorimetría indirecta y modelos predictivos (se seleccionaron 45 fórmulas desarrolladas en adultos de características similares a la muestra estudiada que incluían peso, talla, sexo y/o composición corporal). La concordancia entre ambos métodos se analizó mediante el Coeficiente de Correlación Intraclase (CCI) y la prueba de Bland-Altman. La significación se alcanzó con p < 0,05. Resultados: la edad media fue de 42 años (rango: 23,0– 63,2). El GER medio estimado por CI en la muestra fue de 1589 (312) kcal/día [1822,3 (224,3) kcal/día en varones y 1379,3 (216,1) kcal/día en mujeres; p < 0,05]. Las fórmulas que mejor se ajustaron a la muestra fueron las de De-Lorenzo, Harris-Benedict, Schofield y, especialmente, Korth. Conclusiones: existen grandes variaciones en la estimación del gasto energético en reposo en función de la ecuación predictiva utilizada. Las fórmulas de De-Lorenzo, Harris-Benedic y Schofield se comportan adecuadamente en la muestra evaluada; sin embargo, la de Korth demostró ser la más apta. Los modelos que incluyen peso y/o talla obtuvieron mejores resultados que los que contienen variables de composición corporal.

  12. [A short-term training program reduced acute phase proteins in premenopausal women with metabolic syndrome].

    PubMed

    Rosety-Rodríguez, Manuel; Fornieles, Gabriel; Camacho-Molina, Alejandra; Rosety, Ignacio; Díaz, Antonio J; Rosety, Miguel A; Rodríguez-Pareja, Antonia; Ordonez, Francisco J

    2013-01-01

    Fundamento y objetivo: Actualmente se acepta la importancia del estatus proinflamatorio en la fisiopatología del síndrome metabólico. De hecho, ha sido propuesto como diana terapéutica en el manejo clínico de estos pacientes. Por consiguiente este estudio pretende reducir los niveles plasmáticos de reactantes de fase aguda en mujeres con síndrome metabólico mediante un corto programa de entrenamiento. Material y método: Un total de 135 mujeres jóvenes adultas (38,4 ± 3,3 años) con diagnóstico de síndrome metabólico participaron voluntariamente en este estudio. El grupo de intervención se sometió a un programa de entrenamiento aeróbico de 12 semanas, con 3 sesiones/ semana en el que duración e intensidad de la parte principal se incrementaron progresivamente. Los niveles plasmáticos de proteína C-reactiva (PCR) y fibrinógeno se determinaron mediante nefelometría y HPLC respectivamente. También se evaluaron el fitness cardiovascular mediante prueba de esfuerzo máxima e índices de distribución de masa grasa. Este protocolo fue aprobado por un Comité de Ética Institucional. Resultados: Tras completar el programa, se observo una mejora significativa del fitness cardiovascular además de una reducción también significativa de los niveles de fibrinógeno y PCR. Asimismo, se encontraron correlaciones entre niveles de reactantes e índices de distribución de masa grasa, siendo la de mayor fuerza de asociación la establecida entre PCR y perímetro cintura. Conclusión: Un programa de 12 semanas consiguió reducir los niveles de reactantes de fase aguda en mujeres con síndrome metabólico. Futuros estudios longitudinales son necesarios para conocer el impacto del efecto anti-inflamatorio del ejercicio en el manejo de estos pacientes a medio/largo plazo.

  13. Taxonomía de asteroides y cometas basada en los espectros de Lyapunov

    NASA Astrophysics Data System (ADS)

    Tancredi, G.; Motta, V.; Froeschlé, C.

    Estudiaremos dos familias de objetos que sufren encuentros cercanos con planetas, a saber: la familia de cometas de Júpiter (JF) y los asteroides cercanos a la Tierra (NEAs). El movimiento de estos objetos es caótico en una escala de tiempo corta. Más aún, debido a los cambios erráticos en los elementos orbitales, la comparación de los valores actuales da poca información acerca de la posible vinculación dinámica entre los objetos de una misma familia. Calculamos una estimación finita de los Exponentes Característicos de Lyapunov (LCE), los llamamos Indicadores Característicos de Lyapunov (LCI) para ambas familias y analizamos las características del espacio de fase donde tiene lugar el movimiento de estos objetos. Integrando en un período suficientemente largo (e.g. 20000 años), encontramos que el LCI alcanza un valor cuasi-constante. La mayoría de los miembros de ambas familias muestran una concentración de los tiempos de Lyapunov (inverso del LCI) de alrededor de 50-100 años (Tancredi, 1995, Astron & Astrop., 299, 288). La concentración de los tiempos de Lyapunov es mayor para la familia de Júpiter que para los NEAs. Entre estos últimos, la menor dispersión se da para aquellos que cruzan la órbita de la Tierra. Se demostró que el espectro de los `indicadores locales' (Froeschlé et. al., 1990, Cel. Mec. 56, 307) o ``números de estiramiento'' (Voglis and Contopoulos, 1994, J. Phys. A 26, 4899) (relacionados con el LCI) son invariantes y nos dan una información más completa sobre el comportamiento caótico. Mediante la comparación de espectros discutimos la similitud entre los objetos de una misma familia y analizamos las diferentes posibles rutas al caos. Los espectros se clasifican mediante la comparación de los momentos de las distribuciones de los `números de estiramiento'. Aplicamos un método de agrupamiento jerárquico (Zappala et. al., 1990, Astron. J. 100, 2030) para identificar ``familias'' de espectros (grupos de espectros

  14. [Clinical and radiological results of non-fusion by static interspinous spacer].

    PubMed

    Guzmán-Carranza, Juan Enrique; González-Moga, Amado; Álvarez-Vázquez, Leonardo; Huerta-Hernández, Gabriel; Isáis-Gómez, Abraham; Galicia-Luna, Víctor; Anaya-Contreras, Víctor Hugo

    2017-01-01

    Introducción: el objetivo de este trabajo es demostrar los resultados clínicos y radiológicos de la no fusión en los pacientes con enfermedad degenerativa lumbar y discal mediante la colocación de espaciador interespinoso estático. Métodos: estudio retrospectivo, de enero de 2010 a enero de 2013, con 130 pacientes tratados mediante colocación de espaciador interespinoso estático. Los pacientes se dividieron en: grupo 1 (tratados por diagnóstico de canal lumbar estrecho degenerativo) y grupo 2 (pacientes con diagnóstico de hernia discal lumbar). Se evaluó la mejoría de dolor mediante escala visual análoga (VAS), mejoría funcional con base en la escala de Oswestry (ODI) y resultado radiológico a los 6, 12 y 24 meses. Resultados: se incluyeron 57 pacientes del sexo femenino y 73 masculinos. Los segmentos más afectados fueron L4 - L5 y L5 - S1. En el grupo 1 hubo mejoría del dolor a los 6 meses a 2 puntos, la cual se mantuvo hasta los 12 meses; mientras que a los 24 meses se encontró en 4 puntos. La mejoría funcional (ODI) a los 6 y 12 meses se mantuvo el 13 puntos y a los 24 meses en 21 puntos. Mientras que en el grupo 2: VAS de 2.7, 3, 3.5 respectivamente y ODI de 15 a los 6 y 12 meses; a los 24 meses se encontró en 20 puntos. Hubo complicaciones no mortales en 1.5% en ambos grupos. En cuanto a los cambios radiológicos, se demostró un aumento en el diámetro foraminal el cual se mantuvo a los 6, 12 y 24 meses de seguimiento. Conclusiones: el dispositivo interespinoso es una alternativa de tratamiento eficaz para la enfermedad degenerativa lumbar y la enfermedad discal, ya que se asoció con mejora significativa de dolor lumbar y reincorporación a actividad laboral.

  15. [Evaluation of the nutritional status, insulin resistance and cardiovascular risk in a population of adolescents in the cities of Granada and Almeria (Spain)].

    PubMed

    Montero Alonso, Miguel A; González-Jiménez, Emilio

    2013-01-01

    Objetivos: Los objetivos de este estudio fueron evaluar el estado nutricional e índice de resistencia insulínica mediante HOMA en una población de adolescentes, así como establecer correlaciones entre el estado nutricional de los sujetos, la existencia o no de resistencia a la acción insulínica y el riesgo de padecer hipertensión arterial. Muestra y metodología: Una población de 1001 adolescentes de entre 9 y 17 años de edad, pertenecientes a 18 centros educativos de las provincias de Granada y Almería. Se realizó una valoración completa del estado nutricional de los alumnos mediante antropometría. Para el estudio metabólico, se practicó una extracción sanguínea mediante punción venosa a cada alumno, analizando glucosa basal, insulina basal, índice HOMAIR. Además, se valoró hemoglobina glicosilada (HBA1c), niveles séricos de lipoproteína (a) y ácidos grasos de cadena larga (NEFA). Para el cálculo del índice de resistencia a la insulina, se utilizó el modelo matemático propuesto por Matthews (Homeostasis Model Assessment - HOMAIR), aplicando la fórmula HOMAIR = (insulina x glucosa)/22,5. Resultados: La valoración del estado nutricional reveló un progresivo incremento en los valores de las variables antropométricas a medida que el estado nutricional de los sujetos empeoraba, describiéndose una prevalencia de normopeso del 85,01%, frente a una tasa de sobrepeso del 9,99% y de obesidad del 4,99% para ambos sexos y con independencia de la edad. El estudio metabólico evidenció niveles séricos significativamente más elevados (p < 0,0001) de HBA1c, insulina basal, glucemia basal, NEFA basal, lipoproteína (a) y HOMA IR entre adolescentes con obesidad frente a aquellos otros en situación de normopeso o sobrepeso. Conclusiones: La obesidad constituye un grave problema de salud entre la población de adolescentes estudiada, determinado el desarrollo precoz de trastornos metabólicos, hasta ahora propios de la etapa adulta circunstancia

  16. Dried apples enriched with mandarin juice by vacuum impregnation improve antioxidant capacity and decrease inflammation in obese children.

    PubMed

    Codoñer-Franch, Pilar; Betoret, Ester; Betoret, Noelia; López-Jaén, Ana B; Valls-Bellés, Victoria; Fito, Pedro

    2013-01-01

    Antecedentes: Una adecuada ingesta de vegetales previene el desarrollo de enfermedades degenerativas, principalmente debido a sus compuestos antioxidantes. Objetivo: Evaluamos el efecto in vivo en los niños obesos de un nuevo producto alimenticio hecho de manzanas deshidratadas enriquecidas con zumo de mandarina mediante impregnación a vacío. Métodos: Estudio prospectivo longitudinal de cuatro semanas de duración. Se estudiaron 41 niños obesos que suplementaron su dieta habitual con 40 g/día del producto desarrollado. Se determinaron parámetros antropométricos (índice de masa corporal, circunferencia de la cintura) y estimación de la de grasa corporal con impedancia bioeléctrica. La ingesta dietética se evaluó por cuestionario. Se registraron factores de riesgo metabólico (presión sanguínea, perfil lipídico, glucosa y resistencia insulínica). El estado oxidante se investigó mediante la capacidad antioxidante total del plasma y la 8-hydroxideoxiguanosina (marcador de daño oxidativo al ADN) y como marcadores de inflamación valoramos la proteína C-reactiva ultrasensible, el factor de necrosis tumoral-??y las interleukinas 6 y 1-?. Las mediciones se recogieron al inicio y al final del período de intervención. Resultados: Encontramos una mejoría significativa en la presión arterial sistólica y en el perfil lipídico después del período de intervención. Igualmente demostramos un aumento significativo de la capacidad antioxidante del plasma, una reducción del daño oxidativo del ADN y de los marcadores inflamatorios. Conclusión: La adición a la dieta del producto elaborado con manzana deshidratada, y enriquecido con zumo de mandarina mediante impregnación al vacío, contribuye a mejorar el estado oxidante e inflamatorio en los niños obesos, así como diversos factores de riesgo cardiometabólico.

  17. Effect of binge eating disorder on the outcomes of laparoscopic gastric bypass in the treatment of morbid obesity.

    PubMed

    García Díaz, Eduardo; Jerez Arzola, María Elena; Martín Folgueras, Tomás; Morcillo Herrera, Luis; Jiménez Sosa, Alejandro

    2013-01-01

    Introducción: Los estudios previos sobre el efecto del trastorno por atracón en los resultados del tratamiento de la obesidad mediante bypass gástrico por vía laparoscópica (LGBP) son controvertidos. Faltan trabajos que comparen a pacientes con y sin trastorno por atracón según el sistema BAROS, que incluye: el porcentaje de sobrepeso perdido, la evolución de las comorbilidades, la calidad de vida y las complicaciones. Objetivo: Estudiar si el trastorno por atracón predispone a peores resultados tras el LGBP en los términos que definen el sistema BAROS. Métodos: En un estudio de cohortes con 45 obesos mórbidos intervenidos mediante LGBP, se identificó a los pacientes con trastorno por atracón prequirúrgico mediante el Questionnaire on Eating and Weight Patterns- Revised y se valoró sus resultados según los parámetros incluidos en el sistema BAROS. Resultados: El 21,4% de los pacientes presentaban trastorno por atracón. La mediana de seguimiento postoperatorio fue 12 meses. Los pacientes con trastorno por atracón presentaron menor tasa de resolución de la hipertensión arterial (42,9% frente a 92,9%; p = 0,025) y mayor frecuencia de estenosis de la anastomosis gastroyeyunal (70% frente al 17,1%; p = 0,003) que los pacientes sin trastorno por atracón. No se encontraron diferencias entre los grupos con y sin trastorno por atracón respecto al porcentaje de sobrepeso perdido, calidad de vida y puntuación global BAROS. Conclusiones: Los obesos con trastorno por atracón presentan tras el LGBP menores tasas de resolución de la hipertensión arterial y se complican más frecuentemente con una estenosis de la anastomosis gastroyeyunal. La valoración BAROS, la pérdida de peso y la calidad de vida son equiparables a la de los pacientes sin trastornopor atracón.

  18. PROTEIN MALNUTRITION INCIDENCE COMPARISON AFTER GASTRIC BYPASS VERSUS BILIOPANCREATIC DIVERSION.

    PubMed

    Suárez Llanos, José Pablo; Fuentes Ferrer, Manuel; Alvarez-Sala-Walther, Luis; García Bray, Bruno; Medina González, Laura; Bretón Lesmes, Irene; Moreno Esteban, Basilio

    2015-07-01

    Introducción: la cirugía bariátrica es muy empleada actualmente y en las malabsortivas, las complicaciones nutricionales son habituales. Objetivos: comparar la incidencia de malnutrición proteica e ingesta estimada de proteínas en pacientes intervenidos de bypass gástrico en Y-de-Roux (BGYR) y derivación biliopancreática (DBP), y la influencia de algunos factores de riesgo. Métodos: estudio restrospectivo comparando el desarrollo de hipoalbuminemia en 92 pacientes intervenidos mediante DBP y 121 de DBP (prequirúrgico, a los 3, 6, 12, 18 y 24 meses postquirúrgicos). La ingesta proteica se estimó mediante prealbúmina. Se evaluó la influencia del índice de masa corporal (IMC) previo, la edad y el sexo. Resultados: se encontró hipoprealbuminemia en torno al 40% de los pacientes a los 3 meses tras ambas técnicas, disminuyendo hasta el 10% a los dos años. La incidencia de hipoalbuminemia fue cercana al 20% durante el primer año tras DBP, persistiendo posteriormente en un 10-15% de los casos. Tras el BGYR, dicha incidencia fue menor (5-9% en todos los momentos). Así, durante el primer año postquirúrgico la hipoalbuminemia fue más frecuente tras DBP [3 meses: (OR:3,9;p = 0,006; 95%CI:1,5- 10,4), 6 meses (OR:5,0; p = 0,002; 95% CI:1,8-13,8), y al año (OR:4,4;p = 0,007;95%;CI:1,5-12,8)], pero no así después. Un mayor IMC prequirúrgico favoreció la inicidencia de hipoalbuminemia (OR:1,03; p = 0,046; 95% CI:1-1,06), así como una mayor edad a los 6 meses postquiúrgicos. Conclusión: los pacientes intervenidos mediante DBP tuvieron mayor riesgo de presentar hipoproteinemia que tras BGYR, especialmente durante el primer año postquirúrgico. Un mayor IMC postquirúrgico y la edad (a los 6 meses) podrían favorecer la aparición de hipoproteinemia.

  19. [Association between malnutrition and depression in elderly].

    PubMed

    Pérez Cruz, Elizabeth; Lizárraga Sánchez, Diana Cecilia; Martínez Esteves, María Del Rosario

    2014-04-01

    Antecedentes: La desnutrición y la depresión son trastornos geriátricos comunes. Nuestro objetivo fue determinar la prevalencia de desnutrición y depresión en adultos mayores, así como evaluar su asociación. Métodos: Estudio transversal que se realizó en población geriátrica de la consulta externa de un Hospital Público de referencia de Alta Especialidad de la Ciudad de México. El estado nutricional se clasifico mediante la Evaluación Mínima Nutricional (MNA), el Índice de Quetelet se clasificó acorde a la Organización Mundial para la Salud. La depresión se evaluó mediante la Escala de Depresión Geriátrica (GDS). La funcionalidad se obtuvo mediante el Índice de Katz. Las diferencias entre grupos se analizaron usando la prueba de Chi cuadrada y t-student. La asociación entre el MNA y GDS, así como la determinación de factores predictores para desnutrición se analizó usando análisis multivariado y se determinó la razón de momios (RM). Resultados: 96 pacientes de ≥65 años fueron evaluados, 79,2% fueron mujeres. El 15,5% de la población se clasifico con adecuado estado nutricional, el 72,2% con riesgo de desnutrición y 11,3% con desnutrición. La prevalencia de depresión fue de 63,9%. El análisis de regresión múltiple reveló que la depresión y el sexo masculino son factores predictores independientes de desnutrición. La depresión se asoció positivamente con desnutrición en RM 2,4 (IC 95% 0,79-7,38). Para los individuos del sexo masculino la RM para desnutrición fue de 1,42 (IC 95% 1,0-2,0). Conclusión: La depresión y el sexo masculino están fuertemente asociados con el riesgo de desnutrición en los adultos mayores.

  20. Estudio teórico de la distribución catiónica en la capa octaédrica de silicatos laminares

    NASA Astrophysics Data System (ADS)

    Hernández-Laguna, A.

    Los silicatos laminares son unos minerales de gran extensión en la corteza de nuestro y otros planetas, y se ha detectado su presencia en masas de partículas de polvo interplanatario. Están formados por láminas estructuradas en una capa tetraedros de sílice y una de octaédros de oxihidroxido de aluminio. Según el número de capas y la disposición aparecen distintos minerales. Además, también pueden aparecer distintos minerales como consecuencia de la substitución isomórfica de cationes en la capas, en particular, Al(III) por Si en la capa tetraédrica y Fe(III) y/o Mg(II) por Al(III) en la octaédrica. Cuando el catión substituyente presenta un estado de oxidación más bajo que al que substituye genera carga negativa que tiene que neutralizarse con cationes que se disponen en el espacio interlaminar. En este trabajo vamos a estudiar, mediante distintos métodos computacionales, las distribuciones de dichos cationes de substitución en la capa octaédrica de silicatos laminares 2:1 (dos capas tetraédricas y en medio una octaédrica), en particular, en los minerales esmectitas e ilitas. En primer lugar, estudiaremos la distribución de dichos cationes en la capa octaédrica en un modelo de gas reticular por el método de Monte Carlo, minimizando el número de pares de cationes Al, Fe y Mg de nuestro modelo con respecto a los procedentes de resultados espectroscópicos de muestras de minerales. Posteriormente, y mediante un modelo de potenciales empíricos, estudiamos la energética de las distribuciones binarias en dichos minerales, generando unos potenciales de interacción intercambio a dos y tres cationes (extrapolables a cualquier filosilicato) que son la base para una investigación Monte Carlo-"simulated-annealing" en la que se encuentran las transiciones de fase y las estructuras ordenadas, dependiendo dichas estructuras y la temperatura de cambio de fase de la de la naturaleza y concentración de los cationes de substitución. También se han

  1. [Antimicrobial resistance in uropathogens isolated in a pediatric hospital].

    PubMed

    Pérez-Pérez, Araceli; Peregrino-Bejarano, Leoncio; Camacho-Velázquez, Martha; Miranda-Novales, María Guadalupe

    2014-01-01

    INTRODUCCIÓN: la infección urinaria es una de las más comunes en todas las edades. Recientemente se ha incrementado la resistencia antimicrobiana. El objetivo del estudio fue determinar los agentes etiológicos más frecuentes de infección urinaria y sus perfiles de susceptibilidad antimicrobiana. MÉTODOS: se llevó a cabo una encuesta transversal descriptiva. Se incluyeron los pacientes con infección urinaria identificados durante un año. Se registró tipo de infección, condición de riesgo, tratamientos antimicrobianos, microorganismos y resistencia antimicrobiana. El análisis de los datos se llevó a cabo mediante estadística descriptiva.

  2. Satisfaction with gastrostomy feeding in caregivers of children with home enteral nutrition; application of the SAGA-8 questionnaire and analysis of involved factors.

    PubMed

    Martínez-Costa, Cecilia; Calderón, Caterina; Gómez-López, Lilianne; Borraz, Soraya; Pedrón-Giner, Consuelo

    2013-01-01

    Objetivos: Valorar el grado de satisfacción de los cuidadores de niños con alimentación mediante gastrostomía aplicando el cuestionario estructurado SAGA-8. Segundo, evaluar si la satisfacción parental guarda relación con diversas variables independientes. Métodos: Se realizó un estudio observacional, transversal en 92 cuidadores de niños con enfermedades crónicas que recibían alimentación mediante gastrostomía. Se analizaron los siguientes datos: satisfacción de los cuidadores con la alimentación por gastrostomía (SAGA-8), edad de implantación de la gastrostomía, parámetros antropométricos, tiempo de soporte nutricional, características demográficas familiares y estado psicológico del cuidador. Resultados: Todos los cuidadores eran madres. La mayoría (82,6%) manifestaron una elevada satisfacción con la alimentación mediante gastrostomía. El 85,9% resaltó la sencillez de la técnica sintiéndose el 85,9% muy satisfecha con el apoyo ofrecido por el centro. Un 73,9% de las madres percibió mejoría nutricional en su hijo, señalando el 89,1% un mayor bienestar familiar. Además, el 75% de las madres comunicaron una disminución en el tiempo de alimentación y el 68,5% una reducción en la morbilidad respiratoria. Finalmente, el 71,7% de las madres reconoció que hubieran aceptado antes el procedimiento. La satisfacción se correlacionó significativamente con la edad de implantación de la gastrostomía y con la duración del soporte nutricional, explicando ambos factores el 19,4% de la varianza de la satisfacción. No se encontró correlación con datos antropométricos, tipo de soporte nutricional, características demográficas familiares ni con el estado psicológico del cuidador. Conclusiones: El cuestionario SAGA-8 es sencillo, específico y fácil de aplicar para evaluar el grado de satisfacción de los padres/cuidadores con la alimentación mediante gastrostomía contribuyendo a su monitorización. La duración del soporte

  3. Fotometría y polarimetría de Lynga 1

    NASA Astrophysics Data System (ADS)

    Brusasco, M. A.; Baume, G.; Vázquez, R. A.

    Se presentan los resultados de las observaciones fotométricas CCD-UBVRI hasta magnitud aproximadamente V = 18 y polarimétricas hasta V = 13 en la zona del cúmulo abierto Lynga 1. El mismo se halla en una dirección cercana a un remanente de supernova y fue estudiado previamente por Peterson y FitzGerald (1988) mediante fotometría fotoeléctrica. Se ha redeterminado el enrojecimiento, la distancia y la edad de dicho objeto. Se han hallado además los valores de las pendientes de las funciones de luminosidad y de masa comparándoselas con las de otros cúmulos de edades similares.

  4. Fotometría y polarimetría de Trumpler 21

    NASA Astrophysics Data System (ADS)

    Giorgi, E.; Baume, G.; Vázquez, R. A.

    Se presentan los resultados de las observaciones fotométricas CCD-UBVI hasta aproximadamente magnitud V = 19 y polarimétricas UBVRI hasta V =13 en la región del cúmulo abierto Trumpler 21. El mismo se halla en una dirección cercana al remanente de supernova G307.6-0.3 y fue estudiado previamente por Moffat y Vogt (1973) y por Peterson y FitzGerald (1988) mediante fotometría fotoeléctrica de las estrellas más brillantes. Se ha redeterminado el enrojecimiento, la distancia y la edad de dicho objeto. Se han hallado además los valores de las pendientes de las funciones de luminosidad y de masa comparandoselas con las de otros cúmulos de edades similares.

  5. Estudio multifrecuencia del medio interestelar cercano a HD 192281

    NASA Astrophysics Data System (ADS)

    Arnal, E. M.; Cappa, C.; Cichowolski, S.; Pineault, S.; St-Louis, N.

    Una de las causas que modifica la estructura y dinámica del medio interestelar es la acción que los vientos de las estrellas de gran masa ejercen sobre el mismo. En este trabajo, mediante el uso de datos interferométricos obtenidos en la banda de radio en la transición de 21-cm del Hidrógeno neutro y de imágenes de la emisión de continuo en las bandas de 408 y 1420 MHz, de imágenes HIRES del satélite IRAS en 60 y 100 micrones, y de observaciones de continuo obtenidas con radiotelescopios de disco simple en 2695, 4850 y 8350 MHz se ha realizado un estudio multifrecuencia de los efectos que los vientos estelares de HD 192281, una estrella de tipo espectral O5 Vn((f))p, han tenido sobre el medio interestelar que rodea a la misma.

  6. Errores fotométricos debido al uso del filtro anular de mediana en imágenes CCD

    NASA Astrophysics Data System (ADS)

    Gil-Hutton, R.; Cañada, M.; Noel, N.

    El filtro anular de mediana tiene la importante propiedad de tener una escala claramente definida, lo que permite remover de una imagen CCD todos los objetos con tamaños menores a esta escala, independientemente de su morfología particular, y reemplazarlos por el correspondiente ``background" local. Este filtro es de gran utilidad para remover gradientes de fondo, ``fringing" y halos de objetos extendidos mediante el simple procedimiento de restar a la imagen original una imagen filtrada, repitiendo el proceso las veces que sea necesario. En este trabajo se presentan resultados sobre los errores que introduce este filtro en la fotometría de objetos con diferente relación S/N y su aplicación a imágenes con gradientes de fondo y ``fringing".

  7. Observaciones CCD de los cúmulos abiertos Melotte 105, Ruprecht~75 y Pismis 7

    NASA Astrophysics Data System (ADS)

    Ahumada, J.; Lapasset, E.

    Se presentan los resultados preliminares de observaciones CCD en cinco colores (UBVRI) de campos de ~2,5' de radio centrados en los cúmulos abiertos Melotte 105, Ruprecht 75 y Pismis 7. Los datos fueron adquiridos en abril de 1996 con el telescopio de 60 cm de la Universidad de Toronto en Las Campanas (Chile), y el detector PM512 en su modo directo. Se muestran los diagramas color-magnitud y color-color preliminares de los cúmulos. Mediante criterios fotométricos se hace una selección de los posibles miembros. También se determinan enrojecimientos, distancias y edades de los cúmulos.

  8. Estudio de la galaxia peculiar NGC 1487

    NASA Astrophysics Data System (ADS)

    Agüero, E. L.; Paolantonio, S.; Gunthardt, G.

    La galaxia peculiar NGC 1487, cuya morfología sugiere un evento de ``merging" o interacción próxima, es estudiada en base a material observacional espectroscópico y fotométrico obtenido en el CASLEO. Mediante técnicas espectrofotométricas standards se determinan las principales características espectrales, los mecanismos de excitación actuantes, las condiciones físicas y las velocidades radiales de las estructuras conspicuas de la galaxia. Por otra parte, usando imágenes directas en las bandas B, V, R e I, se obtienen distribuciones detalladas de los colores B-V, V-R y R-I y detalles de su morfología.

  9. [Endovascular treatment of critical basilar stenosis with a Solitaire® stent device: a first experience in our centre].

    PubMed

    Mulero, Patricia; Cortijo-García, Elisa; Ruiz-Piñero, Marina; Pérez-Fernández, Santiago; Arenillas-Lara, Juan F; Martínez-Galdámez, Mario

    2014-08-01

    Introduccion. Aunque la arterioesclerosis intracraneal es una causa importante de ictus, la actitud terapeutica no esta claramente establecida. En este sentido, el estudio SAMMPRIS comparo el tratamiento medico intensivo con la angioplastia y colocacion de stent, con resultados favorables al tratamiento farmacologico. Estos resultados podrian, en parte, deberse al dispositivo utilizado (stent Wingspan ®). Caso clinico. Varon de 71 años con una estenosis grave de la arteria basilar, en quien se repetian episodios de focalidad neurologica transitoria a pesar del tratamiento con doble antiagregacion y estatinas. En estas circunstancias se decidio realizar una arteriografia terapeutica con angioplastia y colocacion de un stent Solitaire ® para optimizar resultados y se logro una estenosis residual del 40%. La evolucion fue favorable y los controles posteriores muestran una minima progresion. Conclusion. Segun nuestro conocimiento, este es el primer caso publicado de tratamiento de una estenosis critica de la arteria basilar mediante la colocacion de un stent Solitaire ®.

  10. NASA Astrophysics Data System (ADS)

    Ahumada, J. A.; Lapasset, E.

    Presentamos resultados de observaciones CCD en cuatro colores (BVRI) de áreas de ~ 5' de radio centradas en los cúmulos abiertos NGC 2658 y NGC 5617. Dichas observaciones se llevaron a cabo en los años 1997 y 1998 con el telescopio de 2,15 m del CASLEO y el detector TEK 1024 en su modo directo con reductor focal. En los diagramas color-magnitud preliminares se aprecian secuencias bien definidas; mediante criterios fotométricos, hacemos una selección de los probables miembros. Asimismo se determinan enrojecimientos, distancias, edades y otros parámetros básicos de los cúmulos.

  11. Nuevas observaciones de cuatro cúmulos abiertos

    NASA Astrophysics Data System (ADS)

    Ahumada, J.; Lapasset, E.

    Presentamos los resultados preliminares de observaciones CCD en cuatro colores (UBVR) de áreas de ~5' de radio centradas en los cúmulos abiertos NGC 2204, NGC 2627, NGC 3247 y NGC 3603. Las observaciones se llevaron a cabo entre los años 1994 y 1996 con el telescopio de 2,15 m del CASLEO y el detector TEK 1024 en su modo directo. Mostramos los diagramas color-magnitud y color-color preliminares de los cúmulos, sobre los que, mediante criterios fotométricos, hacemos una selección de los probables miembros. Asimismo se determinan enrojecimientos, distancias, edades y otros parámetros básicos de los cúmulos.

  12. Are probiotics effective to prevent traveler’s diarrhea?

    PubMed

    Pinos, Yazmín; Castro-Gutiérrez, Victoria; Rada, Gabriel

    2016-12-23

    La diarrea aguda es la enfermedad más común que afecta a los viajeros, principalmente aquellos que se dirigen a regiones de alto riesgo. El uso de probióticos podría prevenir su aparición, sin embargo, los datos que apoyan su uso no son consistentes y no se recomiendan en las guías clínicas actuales. Utilizando la base de datos Epistemonikos, la cual es mantenida mediante búsquedas en múltiples bases de datos, identificamos cuatro revisiones sistemáticas que en conjunto incluyen siete estudios aleatorizados pertinentes a esta pregunta. Realizamos un metanálisis y tablas de resumen de los resultados utilizando el método GRADE. Concluimos que los probióticos podrían prevenir la diarrea del viajero, pero la certeza de la evidencia es baja.

  13. Captura de galaxias enanas en cúmulos de galaxias

    NASA Astrophysics Data System (ADS)

    Bassino, L. P.; Muzzio, J. C.; Pérez, J.

    Se investiga el proceso de captura de galaxias enanas por parte de galaxias gigantes, en presencia de un campo externo causado por materia distribuída y otras galaxias pertenecientes al cúmulo en que se produce el fenómeno. Se trabaja mediante simulaciones numéricas, generando condiciones iniciales típicas de cúmulos de galaxias y representando, con un espectro de masas, a las galaxias más masivas y, como partículas de prueba, a las enanas. Se sigue la evolución del sistema empleando un código de integración de N-cuerpos y se analizan los resultados para determinar las capturas de galaxias enanas.

  14. Concepciones Alternativas de "Fotosintesis" en estudiantes Universitarios del curso basico de Biologia y posibles correcciones con el Modelo Educativo MODEF

    NASA Astrophysics Data System (ADS)

    De Jesus Roman, Sandra

    Concepciones Alternativas de Fotosíntesis en estudiantes Universitariosdel curso básico de Biología y posibles correcciones con el Modelo Educativo MODEF El modelo educativo para la enseñanza de Fotosíntesis (MODEF) se implantó para trabajar el problema de las concepciones alternativas (CA) en un curso de Biología General. Se evaluaron los resultados en cuanto al logro del aprendizaje significativo. La pregunta central de la investigación fue: ¿Cómo aporta el modelo educativo en la didáctica y comprensión del tema de fotosíntesis? Se efectuó una investigación acción con una fase cuantitativa y una cualitativa. Para la fase cuantitativa se elaboró una prueba para determinar las concepciones alternativas, se validó y se sometió a los estudiantes que participaron en el estudio antes y después de ofrecer la unidad de metabolismo celular. Los participantes eran estudiantes de primer año de la Universidad de Puerto Rico en Bayamón (UPRB). Se llevó a cabo un análisis de consistencia interna de la prueba mediante el método Alfa de Cronbach. Se analizaron las contestaciones a cada pregunta mediante la prueba de Ji cuadrado de contingencia, se efectuó la prueba de t y el coeficiente r de Pearson. La fase cualitativa incluyó la observación participativa de la investigadora- profesora, las reflexiones de los estudiantes y la información de las entrevistas semi-estructuradas que se realizaron a tres estudiantes del curso. El análisis se llevó a cabo mediante el Modelo de Wolcott. Se trabajaron diez CA de las cuales siete fueron corregidas mediante el Modelo MODEF. Las actividades más importantes para el proceso de aprendizaje incluyeron el trabajo de investigación o búsqueda de información para hacer una presentación digital, la elaboración de tablas, los mapas de conceptos, el uso de visuales o videos y las analogías para explicar conceptos o procesos. En conclusión: se recomienda el uso del Modelo MODEF para la discusión del tema de

  15. H3+: superficies de energía potencial, estados y transiciones rovibracionales

    NASA Astrophysics Data System (ADS)

    Aguado, M. Paniagua Y. A.

    Hemos calculado varias superficies globales de energía potencial para el estado fundamental y excitados del sistema H3+ en más de ocho mil geometrías diferentes usando una base (9s 3p 1d)/[4s 3p 1d] en cada átomo de Hidrógeno y mediante un método de cálculo de interacción de configuraciones completa (FCI). Hemos ajustado las superficies a formas analíticas del tipo Aguado y Paniagua con un error promedio menor de 50 cm-1 y menor en el pozo de potencial del estado fundamental. Finalmente hemos calculado y analizado los niveles vibracionales para los dos estados electrónicos más bajos, siendo la desviación respecto de los mejores valores publicados, tanto experimentales como teóricos, de unos pocos números de onda.

  16. Obesity-related indicators and their relationship with serum antioxidant activity levels in Mexican adults.

    PubMed

    Amaya-Villalva, María Fernanda; Gonzalez-Aguilar, Gustavo; Rouzaud-Sandez, Ofelia; Gorinstein, Shela; Astiazaran-García, Humberto; Robles-Sanchez, Maribel

    2015-05-01

    Introducción: La obesidad ha sido asociada a un proceso oxidativo, no obstante existen controversias en relación al papel que pueda desempeñar la actividad antioxidante circulante atribuida a compuestos no proteicos. Objetivo: El objetivo del presente estudio fue examinar la relación entre los niveles de actividad antioxidante e indicadores relacionados con obesidad en adultos jóvenes mexicanos. Métodos: Se determinaron las medidas antropométricas y niveles séricos de lípidos y ácido úrico en 78 hombres y 90 mujeres (un total de 168 individuos). También se determinó la actividad antioxidante en distintas fracciones de suero mediante el ensayo de TEAC (TEACNP, TEACP y TEACTotal). Resultados: TEACNP se correlacionó positivamente (p.

  17. DESAFÍOS ÉTICOS DE LA INVESTIGACIÓN CON ANIMALES, MANIPULACIÓN GENÉTICA

    PubMed Central

    Yunta, Eduardo Rodríguez

    2012-01-01

    En la investigación con animales existen cuestionamientos éticos tanto en el uso como modelos de enfermedades humanas y requisito previo para ensayos en humanos como en la introducción de modificaciones genéticas. Algunos de estos cuestionamientos son: no representar exactamente la condición humana como modelos, realizar pruebas de toxicidad con grave daño para los animales, alterar su naturaleza mediante modificaciones genéticas, riesgos de la introducción de organismos genéticamente modificados. El uso de animales en investigación para beneficio humano, impone al ser humano la responsabilidad moral de respetarlo, no haciéndoles sufrir innecesariamente, al estar trabajando con seres vivientes y sentientes. PMID:23338641

  18. [Rapidly progressive dementia and parkinsonism associated to multiple dural arteriovenous fistulas].

    PubMed

    Mejia, P; Piedra, L M; Merchan-Del Hierro, X

    2017-03-01

    Introduccion. Las demencias rapidamente progresivas son un grupo poco frecuente de enfermedades caracterizadas por un deterioro cognitivo y otras alteraciones neurologicas que evolucionan en el transcurso de semanas a meses. Su etiologia es diversa e incluye un gran numero de condiciones neurodegenerativas, toxicas, metabolicas, autoinmunes, infecciosas y vasculares. Caso clinico. Varon de 69 años, que ingreso por demencia rapidamente progresiva y parkinsonismo causado por multiples fistulas arteriovenosas durales tratadas exitosamente mediante terapia endovascular. Conclusion. Las fistulas arteriovenosas durales son conexiones anomalas entre las arterias durales y los senos venosos o venas corticales que constituyen una causa inusual de demencia rapidamente progresiva, pero que debe considerarse, dada la disponibilidad de un tratamiento especifico con reversion de los sintomas.

  19. Validating an energy expenditure prediction equation in overweight and obese Mexican patients.

    PubMed

    Quiroz-Olguín, Gabriela; Serralde-Zúñiga, Aurora E; Saldaña-Morales, Maria Vianey; Gulias-Herrero, Alfonso; Guevara-Cruz, Martha

    2014-10-01

    Antecedentes: La prevalencia de sobrepeso y obesidad en Mexico se situa aproximadamente en el 70%; asi, la obtencion de una medicion fiable del gasto energetico en reposo (GER) en estos pacientes tiene una importancia crucial. El objetivo del estudio consistio en obtener una ecuacion de prediccion de GER en pacientes ambulatorios con sobrepeso u obesidad en la poblacion mexicana. Métodos: El estudio fue realizado en el Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran (Mexico, D.F.). Se evaluo a pacientes ambulatorios consecutivos (18-70 anos) en el servicio de Nutriologia Clinica entre marzo de 2010 y agosto 2012 tras un diagnostico de sobrepeso u obesidad (indice de masa corporal [IMC] ≥ 25 kg/ m2). Los pacientes con cualquier enfermedad que pudiera afectar la medicion de intercambio de gases fueron excluidos. Los participantes fueron evaluados mediante calorimetria indirecta (CI), analisis de impedancia bioelectrica (AIB) y mediciones antropometricas para disenar la ecuacion de prediccion de GER. Fueron evaluados dos grupos: un grupo para diseno y otro para validacion. El GER tambien fue calculado empleando las ecuaciones de Harris-Benedict, Mifflin St-Jeor, Ireton-Jones, Carrasco, Kleiber y Owen, calculando el peso actual, el peso ideal y un peso ajustado. Se obtuvo una ecuacion GER mediante regresion lineal multiple basada en las variables evaluadas, y fueron seleccionadas aquellas que aportaron la mayor precision al modelo. Luego se compararon el GER real y el GER estimado, utilizando la prueba de t de student. Para destacar las diferencias entre pares de mediciones se utilizo el metodo de Bland & Altman. Se calcularon los coeficientes de correlacion de Pearson y los coeficientes de determinacion entre valores GER medidos mediante valores de CI y GER con diversas formulas. Resultados: Un total de 77 pacientes fueron incluidos en el grupo de diseno: 38 hombres (49.4%) y 39 mujeres (50.6%). La edad media fue 48.5 } 13.9 anos, y el IMC

  20. Relationship of physical activity and sedentarism with tobacco and alcohol consumption, and Mediterranean diet in Spanish teenagers.

    PubMed

    Grao-Cruces, Alberto; Nuviala, Alberto; Fernández-Martínez, Antonio; Martínez-López, Emilio-José

    2015-04-01

    Introducción y objetivos: Este estudio examinó la asociación de la actividad física y el sedentarismo con el consumo de alcohol y tabaco, y la adherencia a la dieta mediterránea en adolescentes de ambos sexos. Métodos: Un total de 1897 adolescentes españoles (12-16 años) participaron en el presente estudio transversal. Las variables fueron medidas mediante cuestionarios previamente validados para estas edades. Resultados: La actividad física estuvo positivamente asociada con el grado de adherencia a la dieta mediterránea en ambos sexos (ß = ,144, P < ,001 para chicos y ß = ,066, P < ,05 en chicas), e inversamente asociada con el tabaquismo en chicos (ß = -,135, P =.

  1. Confidence Intervals for Omega Coefficient: Proposal for Calculus.

    PubMed

    Ventura-León, José Luis

    2017-07-14

    La confiabilidad es entendida como una propiedad métrica de las puntuaciones de un instrumento de medida. Recientemente se viene utilizando el coeficiente omega (ω) para la estimación de la confiabilidad. No obstante, la medición nunca es exacta por la influencia del error aleatorio, por esa razón es necesario calcular y reportar el intervalo de confianza (IC) que permite encontrar en valor verdadero en un rango de medida. En ese contexto, el artículo plantea una forma de estimar el IC mediante el método de bootstrap para facilitar este procedimiento se brindan códigos de R (un software de acceso libre) para que puedan realizarse los cálculos de una forma amigable. Se espera que el artículo sirva de ayuda a los investigadores de ámbito de salud.

  2. [Blood and urine lead levels in children with attention deficit hyperactivity disorder].

    PubMed

    Sánchez-Villegas, M del Carmen S; Cortés-Vargas, Astrid; Hidalgo-Luna, Ricardo Gerardo; Alam-Escamilla, David Abraham; Vargas-García, Víctor Manuel; Loría-Castellanos, Jorge

    2014-01-01

    INTRODUCCIÓN: los síntomas del trastorno por déficit de atención e hiperactividad pueden persistir hasta la vida adulta en 60 % de quienes la padecieron en la niñez. Nuestro objetivo fue cuantificar los niveles de plomo en la sangre y la orina en niños con diagnóstico de trastorno por déficit de atención e hiperactividad para identificar si existe alguna relación. MÉTODOS: estudio observacional que incluyó a una muestra cautiva del Servicio de Higiene Mental del Hospital General del Centro Médico Nacional La Raza, con diagnóstico de trastorno por déficit de atención e hiperactividad. Se cuantificaron los niveles séricos y urinarios del plomo mediante la técnica de absorción atómica.

  3. CONSTRUCTION AND EXPRESSION OF DERMATOPHAGOIDES PTERONYSSINUS GROUP 1 MAJOR ALLERGEN T CELL FUSION EPITOPE PEPTIDE VACCINE VECTOR BASED ON THE MHC II PATHWAY.

    PubMed

    Li, Chaopin; Zhao, Beibei; Jiang, Yuxin; Diao, Jidong; Li, Na; Lu, Wei

    2015-11-01

    Antecedentes y objetivo: el Dermatophagoides peteronyssinus es uno de los principales ácaros del polvo doméstico responsables del asma alérgica que se pueden administrar provisionalmente para una inmunoterapia específica. El presente estudio busca construir un vector que codifique epítopos de células T del grupo de alérgenos principal, el Grupo 1 de Dermatophagoides pteronyssinus como una vacuna suministrada mediante la vía MHC de clase II. Métodos: se sintetizaron las secuencias de nucleótidos de los 3 genes objetivo, incluyendo TAT, IhC y el fragmento recombinante de Der p 1 encargado de codificar 3 epítopos de célula T. Después de la amplificación de los 3 fragmentos objetivo por PCR y digestión con endonucleasas de restricción correspondientes, el gen recombinante TAT-IhC-Der p 1-3T se ligó usando T4 DNA ligasa y se insertó en el vector de expresión procariota pET28a (+) para construir el plásmido recombinante pET 28a (+)-TAT-IHC-Der p 1-3T, que se confirmó por digestión con endonucleasas de restricción y secuenciación. El vector recombinante se transformó en E. coli cepa BL21 (DE3) y se indujo con IPTG, y la proteína inducida TATIHC- Der p1-3T se detectó mediante SDS-PAGE. Después de la purificación, la proteina recombinante se confirmó por análisis de inmunotransferencia (Western blot) y se probó su alergenicidad usando el ensayo de unión a IgE. Resultados: el plásmido recombinante pET-28a-TATIHCDer p1-3T se construyó con éxito, se confirmó por digestión con endonucleasas de restricción y la secuenciación y la expresión de la proteína recombinante TAT-IHCDer p1-3T fue inducida en E. coli. Purificación con éxito verificada mediante Western blot de la proteína objetivo, que mostró una capacidad de unión a IgE más fuerte que Der p1. Conclusión: hemos construido con éxito el vector de expresión recombinante pET-28a-TAT-IHC-Der p1-3T que expresa una vacuna de epítopo de células T administrada por vía MHC II con

  4. Estabilidad de los modelos de Heggie y Ramamani

    NASA Astrophysics Data System (ADS)

    Muzzio, J. C.; Vergne, M. M.; Wachlin, F. C.; Carpintero, D. D.

    Los modelos de Heggie y Ramamani de satélites galácticos en órbitas circulares se basan en una teoría aproximada, por lo que es importante verificar su estabilidad mediante simulaciones numéricas. En esta forma, hemos logrado mostrar que son estables sobre intervalos de tiempo mucho mayores que los que lograron los propios autores de los modelos. Por otra parte, dado que hemos mostrado que el caos es significativo en estos modelos, son un sistema ideal para investigar si, pese a ello, se mantienen estacionarios. Nuestras simulaciones numéricas muestran que, pese al caos, la estacionariedad se mantiene sobre intervalos de centenares de tiempos de cruce del sistema, mucho mayores que los tiempos de Liapunov característicos de sus movimientos caóticos.

  5. Can we improve the birth weight prediction? The effect of normal BMI using a multivariate model.

    PubMed

    Vila-Candel, R; Martin-Moreno, J M; Alamar, S; Soriano-Vidal, F J; Naranjo de la Puerta, F G; Murillo, M

    2014-10-03

    Objectivo: construir un modelo predictivo que mejore la estimación del peso del recién nacido (PFE). Material y Métodos: Estudio observacional dónde 140 gestantes fueron estudiadas mediante un muestreo bietápico en un Departamento de Salud en España. Fueron clasificadas en cuatro grupos dependiendo del IMC pregestacional materno. El peso proyectado al nacer fue estimado por la ecografía realizada entre las 33-35 semanas de gestación (PP40s). Se construyó un modelo de regresión con las variables que se reaccionaban con el peso al nacer, altura uterina (AU), PP40s, edad gestacional (EG), nivel de ferritina y cigarillos consumidos. Resultados: Se construyó un modelo multivariante para el grupo Normo-peso para estimar el peso al nacer (PFm) obteniendo una R2=0,727 (p.

  6. Osteoporotic fracture risk evaluation. Options when central densitometry is not available.

    PubMed

    Garduño-García, José de Jesús; Pérez-Espejel, Ingrid; Huitrón-Bravo, Gerardo; Romero-Figueroa, María del Socorro

    2014-01-01

    INTRODUCCIÓN: las fracturas relacionadas con la osteoporosis son un problema de salud. Aunque la densitometría ósea de columna y cadera es el estándar para evaluar la densidad ósea, no siempre es accesible. El objetivo de este estudio fue describir dos alternativas a la densitometría ósea para evaluar el riesgo de fractura por osteoporosis en mujeres posmenopáusicas. MÉTODOS: estudio transversal de 332 mujeres posmenopáusicas sin diagnóstico o tratamiento de osteoporosis, que asistían regularmente a una unidad de primer nivel. Se realizó densitometría periférica de talón, examen físico e historia médica. La evaluación del riesgo de fractura se llevó a cabo mediante FRAXTM.

  7. Nutritional status influences generic and disease-specific quality of life measures in haemodialysis patients.

    PubMed

    Moreira, Ana Catarina; Carolino, Elisabete; Domingos, Fernando; Gaspar, Augusta; Ponce, Pedro; Camilo, María Ermelinda

    2013-01-01

    Antecedentes: En pacientes en hemodiálisis (HD) se han comunicado un estado nutricional deficiente y una peor calidad de vida (CdV) relacionada con la salud. El uso de cuestionarios de CdV genéricos y específicos de la enfermedad en la misma población puede proporcionar un mejor conocimiento del significado de la nutrición en las dimensiones de CdV. Objetivo: Evaluar el estado nutricional mediante parámetros fáciles de usar y evaluar la relación potencial con la CdV medida mediante cuestionarios genéricos y específicos de la enfermedad. Métodos: Se evaluó el estado nutricional mediante evaluación global subjetiva (EGS) adaptada a pacientes renales, índice de masa corporal (IMC), la ingesta nutricional y el apetito. La CdV se evaluó mediante el cuestionario genérico EuroQoL y el específico de la enfermedad Kidney Disease Quality of Life-Short Form (KDQoL-SF). Resultados: El estudio comprendía 130 pacientes de ambos sexos, edad media 62,7 ± 14,7 años. La prevalencia de la malnutrición varió desde 3,1% por un IMC =?18,5 kg/m2 hasta el 75,4% de los pacientes por debajo de las recomendaciones de ingesta de energía y proteínas. Con la excepción de la clasificación por el IMC, los pacientes malnutridos tenían peores puntuaciones en casi todos los dominios de la CdV (EuroQoL y KDQoL-SF), un patrón que se mantenía de forma dominante cuando se ajustaba para las variables demográficas y relacionadas con la enfermedad. Los pacientes con sobrepeso/obesidad (IMC ≥?25) también mostraron peores puntuaciones en algunas dimensiones de la CdV, pero tras el ajuste el patrón sólo se mantenía en el dominio de síntomas y problemas de KDQoL-SF (p = 0,011). Conclusión: Nuestro estudio reveló que incluso en pacientes en HD malnutridos, el estado nutricional tienen un impacto significativo en diversos dominios de la CdV. Los cuestionarios empleados proporcionaron perspectivas distintas, casi complementarias, si bien para la práctica diaria el Euro

  8. [Robotic systems for gait re-education in cases of spinal cord injury: a systematic review].

    PubMed

    Gandara-Sambade, T; Fernandez-Pereira, M; Rodriguez-Sotillo, A

    2017-03-01

    Introduccion. La evidencia que sustenta la reeducacion de la marcha mediante sistemas robotizados de entrenamiento locomotor en pacientes con lesion medular presenta aspectos pobremente caracterizados. Objetivo. Realizar una revision sistematica cualitativa de la eficacia de esta terapia. Pacientes y metodos. Se realizo una busqueda en PubMed, CINAHL, Cochrane Library y PEDro desde enero de 2005 a abril de 2016. Tambien se reviso la bibliografia de estos articulos por si hubiese algun estudio adicional no identificado con la estrategia inicial. El nivel metodologico de los articulos se evaluo mediante la escala PEDro y la de Downs y Black. Se localizaron 129 articulos potencialmente interesantes, de los que 10 estudios cumplieron los criterios de inclusion. Estos estudios evaluaron 286 pacientes, que eran predominantemente jovenes y varones. La mayoria tenia una lesion medular incompleta y una clasificacion de C o D en la escala ASIA. Resultados. Los dispositivos robotizados empleados en estos estudios fueron Lokomat, Gait Trainer y LOPES. La mejoria en los parametros de la marcha evaluados fue mas evidente en los pacientes jovenes, con lesion medular subaguda, asi como en los que tenian puntuaciones altas de ASIA o LEMS. En cambio, factores como la etologia, los niveles de lesion o el sexo fueron menos predictivos de mejoria. El nivel metodologico de estos estudios fue aceptable de acuerdo con la escala PEDro y la de Downs y Black. Conclusiones. La evidencia del entrenamiento locomotor con dispositivos roboticos en pacientes con lesion medular es positiva, aunque limitada y de nivel metodologico aceptable respecto al sistema convencional cuando el tiempo desde la lesion es de varios meses (4-6 meses). A pesar de ello, este efecto se invierte durante el primer mes tras la lesion, y el sistema convencional muestra mejores resultados que el robotizado.

  9. [Characterisation of factors associated with carotid stenosis in a population at high risk].

    PubMed

    Chiquete, Erwin; Torres-Octavo, Benjamín; Cano-Nigenda, Vanessa; Valle-Rojas, Deyanira; Dominguez-Moreno, Rogelio; Tolosa-Tort, Paulina; Florez-Cardona, José Alejandro; Flores-Silva, Fernando; Reyes-Melo, Isael; Higuera-Calleja, Jesús; Garcia-Ramos, Guillermo; Cantu-Brito, Carlos

    2014-06-16

    Introduccion. La estenosis moderada a grave es la forma de enfermedad carotidea aterosclerosa menos prevalente, pero que implica un alto riesgo de ictus isquemico. Objetivo. Caracterizar los factores asociados con la estenosis carotidea moderada a grave en una poblacion de alto riesgo. Pacientes y metodos. Realizamos un analisis de los factores de riesgo tradicionales asociados a estenosis carotidea >= 50% en 533 pacientes que recibieron evaluacion mediante ultrasonograma Doppler por historia de ictus (34%), o que contaban con al menos dos de los factores de riesgo: edad >= 55 años (86%), hipertension (65%), dislipidemia (52%), obesidad (42%), diabetes (40%) o tabaquismo (40%). Resultados. La prevalencia de estenosis carotidea >= 50% fue del 7,1%, sintomatica (asociada a ictus en territorio congruente) en el 5,6%, bilateral en el 2,1% y sintomatica bilateral en el 1,5%. Un 36,8% de los pacientes presento carga moderada a grave (>= 4) de placas de ateroma (25,9%, moderada: 4-6 placas; y 10,9%, grave: >= 7 placas). Mediante analisis multivariable se identifico la edad >= 75 años, la dislipidemia y el tabaquismo como factores asociados con estenosis >= 50%, y la hipertension arterial y el tabaquismo con estenosis sintomatica. El numero de factores de riesgo se asocio fuertemente con la prevalencia de estenosis carotidea. Notablemente, ni la diabetes ni la obesidad explicaron el grado de estenosis moderada a grave. Conclusiones. Como formas de enfermedad carotidea aterosclerosa, la frecuencia de estenosis moderada a grave es menor que una carga alta de placas de ateroma. La edad avanzada, el tabaquismo, la dislipidemia y la hipertension son los principales factores tradicionales que se asocian con el grado de estenosis carotidea.

  10. [Not Available].

    PubMed

    Vio, Fernando; Lera, Lydia; Salinas, Judith

    2016-07-19

    Objetivo: mediante la técnica de consenso Delphi, conocer la opinión de un grupo de expertos en nutrición, educación y gastronomía para buscar consenso sobre metodologías educativas en alimentación saludable, alumnos de tercero a quinto año básico, sus familias y profesores.Métodos: con los resultados de encuestas y grupos focales realizados previamente a niños, padres y profesores, se elaboró un cuestionario que fue enviado a 51 expertos en nutrición, educación y gastronomía en una primera ronda. Los resultados fueron analizados y reenviados en una segunda ronda con las preguntas no consensuadas, obteniendo 38 respuestas.Resultados: hubo consenso en que se pueden cambiar hábitos en escuelas mediante talleres de cocina con chefs o monitores, educación activo-participativa y huertos escolares. Padres y profesores deben tener habilidades culinarias saludables para educar a los niños. Estos deben hacer uso racional del dinero en la escuela. Para ello es necesario cambiar la oferta del kiosko hacia alimentos saludables, o suprimirlo si no es saludable. Los profesores deben capacitarse con talleres de autocuidado y vida sana para educar en alimentación saludable a los niños en horarios de clase con material educativo, talleres de cocina con recetas y aprovechar horarios de desayuno y almuerzo para actividades educativas. Los padres deben participar en talleres para escoger alimentos saludables en lugares de venta y preparar menús saludables. Los niños deben aprender habilidades culinarias simples, preparando y degustando alimentos saludables. Conclusiones: estos resultados son fundamentales para diseñar materiales educativos en alimentación saludable que cambien los malos hábitos alimentarios actuales.

  11. [LIFESTYLES AND FACTORS ASSOCIATED TO NUTRITION AND PHYSICAL ACTIVITY AMONG ADOLESCENTS].

    PubMed

    Lima-Serrano, Marta; Guerra-Martín, María Dolores; Lima-Rodríguez, Joaquín Salvador

    2015-12-01

    Introducción y objetivos: los objetivos del estudio han sido conocer los estilos de vida de los adolescentes del sur de España, en áreas de alimentación y actividad física, y analizar la influencia de variables sociodemográficas en los mismos. Métodos: se utilizó un diseño transversal correlacional con 204 estudiantes de educación secundaria. Se realizó análisis descriptivo, bivariante y multivariante usando modelos de regresión (=0,05). Resultados: desayunaba a diario el 67%. Consumían más de seis veces a la semana: lácteos (56,3%), cereales (44,1%), frutas (40,7%) y verduras (28,5%). Hacían actividad física, al menos 60 minutos, 4,34 días a la semana y el índice de masa corporal se situó en normopeso (19,85). Mediante modelos lineales multivariantes se comprobó la influencia de la edad, el sexo/género y el estatus social sobre el índice de masa corporal, el consumo de frutas y verduras y la frecuencia de actividad física de estos adolescentes. Conclusiones: conocer las desigualdades en las áreas de alimentación y actividad física en los adolescentes, así como sus factores de riesgo o determinantes sociales puede ayudar en el diseño de estrategias y políticas de salud pública específicas, teniendo en cuenta estos determinantes sociales, a nivel normativo y mediante intervenciones de promoción de la salud nutricional y la actividad física.

  12. [Trends in Google searches on complementary and alternative medicine].

    PubMed

    Cevallos-Morales, Alejandro; Málaga, Marco; Taype-Rondan, Alvaro

    2017-01-01

    Introducción: el objetivo de este artículo es evaluar el interés de la población en terapias de medicina alternativa y complementaria (MAC), a través de la herramienta Google Trends y en países de habla hispana. Métodos: se realizó un estudio observacional mediante la herramienta Google Trends. Se evaluaron las tendencias de búsqueda de 34 terapias de MAC en español, de manera global y en 21 países de habla hispana. Se evaluó la asociación entre la mediana de búsquedas de las terapias más populares y el producto interno bruto (PIB) per cápita en cada país, mediante la prueba de Spearman. Resultados: se observa una tendencia descendente en el volumen de búsquedas de homeopatía, medicina herbaria, acupuntura y terapias sensoriales; así como una tendencia ascendente de la quiropraxia. Además, al analizar los países se observó una asociación directa entre el PIB per cápita y la mediana de la búsqueda de las terapias de MAC más populares, pero esta no fue significativa (p = 0.432). Conclusiones: el interés de terapias de MAC presenta variaciones temporales y geográficas que deben estudiarse a profundidad. Estos resultados pueden ser de utilidad para establecer una vigilancia internacional al respecto.

  13. [Health-related quality of life in children with epilepsy in a Mexican hospital].

    PubMed

    Dávila-Ávila, Ned M; Delgado-De la Mora, Jesús; Candia-Plata, M Carmen; Alvarez-Hernández, Gerardo

    2014-07-16

    Introduccion. La epilepsia es un sindrome neurologico cronico que cursa con descargas anormales, sincronicas y exageradas de la corteza cerebral. La epilepsia se relaciona inversamente con la calidad de vida relacionada con la salud de los pacientes (CVRS); sin embargo, esta relacion se ha documentado poco en niños de Latinoamerica. Objetivo. Examinar la relacion entre epilepsia y la CVRS en un grupo de niños escolares de 8-12 años atendidos en un hospital pediatrico de Sonora, Mexico. Pacientes y metodos. Se comparo transversalmente la CVRS de niños con diagnostico de epilepsia con respecto a la CVRS de dos grupos control. Se utilizo el cuestionario validado Pediatric Quality of Life Inventory para evaluar la CVRS. Las diferencias se examinaron mediante la prueba de ANOVA, y la asociacion entre epilepsia y CVRS se modelo mediante regresion logistica multiple. Resultados. Los niños con epilepsia mostraron la menor puntuacion de CVRS (62,4 ± 14,8) entre los sujetos estudiados, y tuvieron 5,2 veces mas riesgo de deterioro de su CVRS (intervalo de confianza al 95% = 2,43-11,06) en comparacion con el de niños sanos. El deterioro fue mayor en las escalas cognitiva (54,6 ± 15,0) y emocional (55,9 ± 23,6). La polifarmacia –ingestion concomitante de tres o mas farmacos– (p < 0,001) y la progresion cronologica de la enfermedad (p < 0,001) son factores que deterioran significativamente la CVRS de niños con epilepsia. Conclusiones. La epilepsia provoca un deterioro global en la CVRS de los niños, especificamente en las esferas cognitiva y emocional, lo que se relaciona con la progresion cronologica de la enfermedad y la polifarmacia.

  14. [An exceptional mimicker of ovarian tumors: cancer in a pelvic horseshoe kidney].

    PubMed

    Ortiz-Mendoza, Carlos Manuel

    2013-01-01

    Introducción: aunque el riñón en herradura es una anomalía congénita frecuente, hasta el momento no se había informado que produjera un tumor maligno que pareciera una neoplasia de ovario. Caso clínico: mujer de 53 años de edad con un tumor pélvico, que tenía el antecedente de una histerectomía simple debida a miomatosis. Mediante la exploración abdominal se detectó una masa en hipogastrio, edondeada, de 20 cm, firme y fija. En el tacto vaginal, la lesión era palpable a través del fondo de saco. Con el diagnóstico de una probable neoplasia por síndrome de ovario residual, la paciente fue remitida al servicio de ginecología para su estudio y atención. Una tomografía computarizada demostró que la masa se originaba del lado derecho de un riñón pélvico malformado. Por lo anterior, la paciente fue enviada al servicio de oncología quirúrgica, donde se corroboró el hallazgo. Al analizar los estudios de imagen se emitió el diagnóstico de una probable neoplasia de un riñón pélvico en herradura. La paciente fue sometida a una laparotomía exploradora, en la que se extirpó un tumor de 19 cm del riñón malformado, cuyo polo inferior ocupaba la pelvis verdadera. Mediante el examen histopalógico se determinó que se trataba de un carcinoma de células cromófobas. Conclusiones: en las mujeres, los tumores del riñón pélvico en herradura pueden simular un tumor de ovario.

  15. [Influence of sport practice and physical exercise on anthropometric indicators and weight satisfaction in men university students: a pilot study].

    PubMed

    Telleria-Aramburu, Nerea; Sánchez, Celia; Ansotegui, Laura; Rocandio, Ana M; Arroyo-Izaga, Marta

    2014-10-03

    Introducción: Los jovenes universitarios presentan en general niveles bajos de actividad fisica, lo que podria repercutir en su peso y composicion corporal y en el conocimiento y aceptacion de su propio cuerpo. Objetivo: Evaluar el estado de peso y la composicion corporal, asi como la autopercepcion y satisfaccion con el peso corporal en universitarios, y analizar la influencia de la actividad fisico-deportiva sobre estas variables. Métodos: La muestra estuvo formada por 62 estudiantes varones con una edad media de 20,7+/-1,7 anos. La practica de deporte y/o ejercicio fisico en el tiempo libre se analizo mediante cuestionario. El estado de peso y la composicion corporal se evaluaron mediante antropometria. Tambien se registraron datos de peso autodeclarado y deseado, y de talla autodeclarada. Las medidas de peso real, autodeclarado y deseado se utilizaron para estimar la autopercepcion y satisfaccion con el peso. El analisis estadistico se realizo con el programa SPSS version 22.0. Resultados: El 17,7% de los participantes presentaba sobrepeso y el 6,5% bajo peso. El 45,2% tenia un gasto por el deporte y/o ejercicio fisico ≤ 3.000 kcal/semana y el 32,3% > 3.000 kcal/semana. La autopercepcion y satisfaccion con el peso fue mejor en el grupo que practicaba deporte y/o ejercicio fisico a razon de ≤ 3.000 kcal/semana, que en aquellos que no practicaban ningun ejercicio fisico o deporte (P < 0,05). Conclusión: La practica regular de actividad fisicodeportiva moderada esta relacionada con una mejor percepcion y satisfaccion con el peso corporal, en comparacion con el sedentarismo. Deberia aprovecharse el periodo de estudios universitarios para fomentar la practica de ejercicio fisico-deportivo, empleando los recursos o activos con los que cuenta la Universidad.

  16. Cervical length screening for prevention of preterm birth in singleton pregnancy with threatened preterm labor: systematic review and meta-analysis of randomized controlled trials using individual patient-level data.

    PubMed

    Berghella, V; Palacio, M; Ness, A; Alfirevic, Z; Nicolaides, K H; Saccone, G

    2017-03-01

    there were available data were similar in the two groups. There is a significant association between knowledge of TVS CL and lower incidence of PTB and later gestational age at delivery in symptomatic singleton gestations with threatened PTL. Given that in the meta-analysis we found a significant 36% reduction in the primary outcome, but other outcomes were mostly statistically similar, further study needs to be undertaken to understand better whether the predictive characteristics of CL screening by TVS can be translated into better clinical management and therefore better outcomes and under what circumstances. Copyright © 2016 ISUOG. Published by John Wiley & Sons Ltd. CRIBADO MEDIANTE LA LONGITUD CERVICAL PARA LA PREVENCIÓN DEL PARTO PRETÉRMINO EN EMBARAZOS CON FETO ÚNICO Y RIESGO DE PARTO PREMATURO: REVISIÓN SISTEMÁTICA Y METAANÁLISIS DE ENSAYOS CONTROLADOS ALEATORIZADOS HACIENDO USO DE LOS DATOS INDIVIDUALES DE LAS PACIENTES: RESUMEN OBJETIVO: El cribado mediante la longitud cervical obtenida con ecografía transvaginal (ETV) ha demostrado ser una buena prueba para la predicción del parto pretérmino espontáneo (PPTE) en embarazos con feto único sintomáticos debido a la amenaza de parto pretérmino (PPT). El objetivo de esta revisión y metaanálisis de los datos de participantes individuales fue evaluar el efecto de medir la longitud cervical (LC) mediante ETV con el fin de prevenir el parto prematuro en embarazos únicos con amenaza de PPT. MÉTODOS: Se realizaron búsquedas en los ficheros de ensayos de Cochrane Pregnancy and Childbirth Group y Complementary Medicine Field (mayo de 2016), y en las listas de referencias de los estudios encontrados. Los criterios de selección incluyeron ensayos controlados aleatorizados de embarazos con feto único y riesgo de PPT con aleatorización de la paciente basada principalmente en el cribado mediante la LC (grupo de intervención), el cribado mediante la LC sin conocimiento de los resultados, o sin cribado de

  17. Prevalence of metilentetrahidrofolate reductase C677T polymorphism, consumption of vitamins B6, B9, B12 and determination of lipidic hydroperoxides in obese and normal weight Mexican population.

    PubMed

    Hernández-Guerrero, César; Romo-Palafox, Inés; Díaz-Gutiérrez, Mary Carmen; Iturbe-García, Mariana; Texcahua-Salazar, Alejandra; Pérez-Lizaur, Ana Bertha

    2013-11-01

    Introducción. El estrés oxidativo es un factor clave en el inicio y el desarrollo de las comorbilidades de la obesidad. La enzima metiltetrahidrofolato reductasa (MTHFR) participa en el metabolismo del folato con la acción de las vitaminas B9 y B12. El gen MTHFR puede presentar un polimorfismo de un solo nucleótido (SNP) en la posición 677 (C677T), que puede promover homocisteinemia asociada a la producción de radicales libres. Objetivo. Determinar la frecuencia del SNP C677T de la MTHFR, evaluar el consumo de vitaminas B6, B9, B12 y determinar la concentración de hidroperóxidos lipídicos (LOOH) en plasma en un grupo de obesos y testigo. Métodos. Se clasificaron 128 mexicanos mestizos de acuerdo a su índice de masa corporal en normopeso (Nw; n=75) y obesidad (ObeI-III; n=53). Se identificó el SNP C677T de la MTHFR mediante la técnica de PCR-RFLP. El consumo de vitaminas B6, B9 y B12 se evaluó mediante una encuesta validada. Se determinaron LOOH como un indicador de estrés oxidativo periférico. Resultados. No hubo diferencia estadística significativa en la frecuencia del polimorfismo C677T entre homocigotos TT en Nw (0.19) y ObeI-III (0.25). La frecuencia del alelo T en Nw fue de 0.45, y 0.51 en el grupo ObeI-III. Los LOOH mostraron diferencia estadística significativa (p.

  18. [Sarcopenic obesity and physical fitness in octogenarians: the multi-center EXERNET Project].

    PubMed

    Muñoz-Arribas, Alberto; Mata, Esmeralda; Pedrero-Chamizo, Raquel; Espino, Luis; Gusi, Narcis; Villa, Gerardo; Gonzalez-Gross, Marcela; Casajús, José Antonio; Ara, Ignacio; Gómez-Cabello, Alba

    2013-11-01

    Objetivo: El objetivo de este estudio fue analizar la utilidad de diferentes test de condición física para detectar el riesgo de sufrir obesidad sarcopénica (OS) en octogenarios. Métodos: 306 sujetos (76 hombres, 230 mujeres) con una media de edad de 82,5±2,3 años, del total de la muestra del Proyecto Multi-céntrico EXERNET cumplieron con los criterios de inclusión. La composición corporal se evaluó en todos los sujetos mediante impedancia bioeléctrica. Se crearon 4 grupos basados en el porcentaje de masa grasa y masa muscular: 1) normal, 2) elevada masa grasa, 3) baja masa muscular y 4) OS. La condición física fue evaluada utilizando 8 test diferentes adaptados de las baterías “Senior Fitness Test” y “Eurofit” (batería EXERNET). La probabilidad de padecer OS en función del nivel de condición física se estudió mediante regresión logística. Resultados: Entre las pruebas de condición física estudiadas, los test que mejor predecían el riesgo de sufrir OS fueron la falta de fuerza de piernas, fuerza de brazos, agilidad, velocidad y equilibrio en hombres; 95% CI [(0,606-0,957); (0,496-0,882); (1,116-3,636); (1,060-1,825); (0,913-1,002); todos p.

  19. PubMed

    Oliver Bonet, Maria; Mach, Núria

    2016-09-20

    Introducción: la infertilidad es un problema global en aumento. Se estima que aproximadamente un 15% de las parejas en edad reproductiva tiene dificultades a la hora de concebir. De estas, alrededor de la mitad presentan uno o varios factores masculinos asociados a infertilidad o subfertilidad, aislados o en combinación con problemas de origen femenino. Durante la última década se ha empezado a estudiar la infertilidad desde una perspectiva multifactorial, considerando las interacciones y conexiones entre diferentes situaciones genéticas, epigenéticas, bioquímicas y fisiológicas del paciente.Objetivo: la presente revisión pretende describir mecanismos epigenéticos que pueden ser modulados mediante aspectos nutricionales y que están relacionados con la etiología de la infertilidad masculina y con la herencia transgeneracional de este fenotipo.Material y métodos: se ha realizado una extensa búsqueda de publicaciones científicas en las principales bases de datos electrónicas especializadas: NBCI, Elsevier, Scielo, Scirus y Science Direct.Resultados y conclusión: varios trabajos que muestran la importancia del estado nutricional en la fertilidad del hombre y, más específicamente, la capacidad de los componentes de la dieta para modificar los perfiles epigenéticos que no únicamente pueden afectar a su fertilidad, sino que también pueden ser transmitidos a la descendencia mediante lo que se ha denominado herencia transgeneracional, ocasionándoles problemas de salud diversos entre los que también se hallan problemas en la fertilidad.

  20. Central obesity and not age increases skeletal muscle lipids, without influencing lean body mass and strength.

    PubMed

    de la Maza, María Pía; Hirsch, Sandra; Jara, Natalia; Leiva, Laura; Barrera, Gladys; Silva, Claudio; Pañella, Loreto; Henríquez, Sandra; Bunout, Daniel

    2014-09-12

    Introducción/Objetivos: medir la infiltracion grasa en el musculo esqueletico, su asociacion con resistencia a la insulina (RI) y con masa y funcion muscular, en hombres chilenos de diferente edad y composicion corporal. Nuestra hipotesis era que habria mas acumulacion de grasa en el tejido muscular entre las personas de mayor edad y peso, lo cual deterioraria la sensibilidad a la insulina (SI) y afectaria negativamente la masa y la funcion muscular, ambas caracteristicas del proceso de envejecimiento. Métodos: se estudiaron hombres sanos (38 < 55 anos y 18 > 65 anos), que fueron sometidos a mediciones antropometricas, evaluacion de la composicion corporal mediante densitometria radiologica (DEXA), espectroscopia de resonancia nuclear magnetica en el musculo tibial anterior para medir lipidos intra (LIM) y extramiocelulares (LEM), fuerza de mano y cuadriceps, test de 12 minutos y bioquimica serica (glicemia, hemoglobina, lipoproteinas, creatinina y proteina C reactiva ultrasensible en ayunas, ademas de glucosa e insulina post carga de glucosa para evaluar SI). La actividad fisica se estimo mediante actigrafia. Resultados: 23 hombres eran eutroficos, 26 tenian sobrepeso y 7 eran obesos, todos eran sedentarios segun el registro actigrafico, independiente de la edad. Tanto LIM como LEM resultaron mas altos entre los hombres con sobrepeso / obesidad. La grasa abdominal se asocio negativamente con la SI y se correlaciono positivamente con la acumulacion de grasa en el musculo (tanto LIM como LEM), pero no con la edad. Como era de esperar, las personas mayores tenian menor masa magra y fuerza, pero no mas tejido adiposo ni lipidos intramiocelulares, aunque eran mas intolerantes a la glucosa. Conclusiones: La obesidad central se asocio con infiltracion de grasa intramuscular y con RI. Esta distribucion adiposa no se relaciono con edad ni con sarcopenia asociada al envejecimiento. Las personas mayores resultaron mas intolerantes a la glucosa, explicable por una

  1. [SOFT DRINKS CONSUMPTION AMONG PREGNANT WOMEN IN COLOMBIA: FACTORS ASSOCIATED].

    PubMed

    Martínez Torres, Javier; Meneses-Echávez, José Francisco; Correa-Bautista, Jorge Enrique; Ramírez-Vélez, Robinson

    2015-08-01

    Objetivo: examinar los factores asociados al consumo regular de bebidas carbonatadas (BCS) en gestantes colombianas. Métodos: estudio descriptivo transversal, secundario de la información obtenida en la Encuesta Nacional de la Situación Nutricional 2010 (ENSIN 2010), en 1.865 mujeres embarazas de entre 13 y 49 años de edad. El consumo de BCS y los factores asociados (edad materna, trimestre de embarazo, nivel de Sisbén, región y área geográfica, etnia y escolaridad), se recogieron mediante una encuesta estructurada. Se establecieron asociaciones mediante la construcción de modelos de regresión y factores asociados. Resultados: el 17% de las mujeres embarazadas consumen al menos una bebida BCS diaria. Tener entre 13 y 17 años de edad, pertenecer a la etnia afrocolombiana, cursar el primer trimestre de embarazo y agruparse en el Sisbén nivel II mostraron el mayor patrón de consumo diario (23,8%, 22,8%, 21,4% y 20,9%), respectivamente. Los modelos de regresión muestran que pertenecer al grupo de 13 a 17 años OR 1,92 (IC95% 1,04-3,55), residir en la zona oriental OR 1,85 (IC95% 1,05-3,27) o central OR 1,73 (IC95% 1,01-2,96) y cursar el primer trimestre de gestación OR 1,59 (IC95% 1,01-2,52) se asociaron como factores predisponentes al consumo diario de BCS. Conclusiones: las embarazadas de Colombia presentan una alta prevalencia de consumo diario de BCS, por lo que se recomiendan intervenciones integrales en las que estén involucrados el componente nutricional y educativo.

  2. [Detection of the PMP22 gene duplication in peripheral neuropathy patients: a study in Mexican population].

    PubMed

    Cortés, Hernán; Hernández-Hernández, Óscar; Bautista-Tirado, Teresa; Escobar-Cedillo, Rosa Elena; Magaña, Jonathan J; Leyva-García, Norberto

    2014-08-01

    Introduccion. La enfermedad de Charcot-Marie-Tooth (CMT) es una neuropatia que afecta los nervios motores y sensitivos, y la CMT1A es el subtipo mas frecuente en el mundo. La CMT1A se produce por una duplicacion de 1,5 Mb en el locus 17p11.2-p12, donde se localiza el gen PMP22. Para el diagnostico de CMT1A es importante contar con tecnicas moleculares especificas para la determinacion de esta mutacion. Objetivos. Establecer un metodo de uso rutinario para detectar la duplicacion de PMP22 en la poblacion mexicana y estimar su frecuencia en pacientes con caracteristicas clinicas para la CMT. Pacientes y metodos. Se analizaron 157 pacientes mexicanos no relacionados entre si, diagnosticados de CMT por valoracion clinica. La determinacion de la duplicacion de PMP22 se realizo a traves de reaccion en cadena de la polimerasa en tiempo real mediante el metodo comparativo 2–ΔΔCT. Resultados. El metodo 2–ΔΔCT para detectar la duplicacion del gen PMP22 mostro ser sensible y fiable. Los resultados fueron consistentes con los obtenidos mediante la tecnica de hibridacion in situ fluorescente. Se detecto la duplicacion de PMP22 en 79 pacientes (50,3%), con un comportamiento similar a lo comunicado en Estados Unidos, Australia, Finlandia, Suecia y España. Sin embargo, se observo que existen diferencias con otras poblaciones. Conclusiones. La tecnica de reaccion en cadena de la polimerasa cuantitativa se implemento como un diagnostico molecular de CMT1A eficaz y de bajo coste, por lo que puede utilizarse rutinariamente en Mexico. Esto es esencial para el asesoramiento genetico y el tratamiento oportuno de los pacientes con CMT. La frecuencia de la duplicacion del gen PMP22 varia entre regiones geograficas, por lo que es importante estimarla en diferentes poblaciones.

  3. [Psychosocial profile and family support perception in adults].

    PubMed

    Landeros-Herrera, Jesús Ernesto; Simental-Mendía, Luis E; Rodríguez-Durán, Juan Luis

    2015-01-01

    Introducción: las alteraciones del perfil psicosocial son la base de los trastornos de la personalidad, los cuales se presentan frecuentemente en la población mexicana. Así, el objetivo de este estudio fue determinar si la percepción del apoyo familiar está asociada con el perfil psicosocial en adultos. Métodos: se realizó un estudio transversal analítico en el que se incluyeron 450 hombres y mujeres no embarazadas mayores de 18 y menores de 60 años de edad. De acuerdo al perfil psicosocial, los sujetos fueron asignados dentro de los grupos: alterado y no alterado. La presencia de cualquier enfermedad psiquiátrica, renal, hepática, diabetes, cardiovascular, neoplasia o algún tipo de discapacidad fueron criterios de exclusión. La percepción del apoyo familiar se determinó mediante el APGAR familiar y el perfil psicosocial, usando el instrumento del Dr. Víctor Chávez. Se determinó la asociación entre la percepción del apoyo familiar y el perfil psicosocial mediante un análisis de regresión logística. Resultados: un total de 344 (76.4 %) y 106 (23.5 %) sujetos fueron incluidos dentro de los grupos con perfil psicosocial alterado y no alterado, respectivamente. La moderada disfunción familiar (OR = 1.80, IC 95 % 1.01-3.23 p = 0.04), y la familia altamente disfuncional (OR = 3.88, IC 95 % 1.09-12.09 p = 0.02) se asociaron significativamente con el perfil psicosocial alterado. Conclusiones: tanto la moderada como la alta disfunción familiar están asociadas con el perfil psicosocial alterado en adultos.

  4. Isolation of poxvirus from debilitating cutaneous lesions on four immature grackles (Quiscalus sp.)

    USGS Publications Warehouse

    Docherty, D.E.; Long, R.I.R.; Flickinger, Edward L.; Locke, L.N.

    1991-01-01

    Poxvirus was isolated from nodules on four immature grackles (Quiscalus sp.) collected in two residential areas of Victoria, Texas. All of the birds were emaciated and had nodules on the eyelids, bill, legs, toes, and areas of the skin on the wings, neck, and ventral abdomen. These pox nodules were extensive and probably interfered with both sight and flight. The preliminary diagnosis was confirmed by virus isolation, histopathology, and electron microscopy. Poxvirus was isolated on the chorioallantoic membrane of embryonated hen's eggs and in Muscovy duck embryo fibroblast cell culture. Phaenicia calliphoridae (blowfly) larvae were found in one of the pox nodules, raising the possibility of mechanical transmission of the virus by contaminated adult blowfiles. /// Se aisl?? virus de viruela a partir de n??dulos presentes en cuatro estorninos inmaduros (Quiscalus sp.) capturados en dos ?!reas residenciales de Victoria, Texas. Las cuatro aves estaban emaciadas y presentaron n??dulos en los p?!rpados, pico, patas, dedos, y algunas ?!reas de la piel de las alas, cuello, y regi??n inferior del abdomen. Estos n??dulos producidos por viruela eran extensos y probablemente interfirieron con la visi??n y el vuelo. El diagn??stico presuntivo fue confirmado mediante aislamiento viral, histopatolog?-a, y microscop?-a electr??nica. Se aisl?? el virus de viruela en la membrana corioalantoidea de huevos embrionados de gallina y en cultivos celulares de fibroblasto de embri??n de pato. Se encontraron larvas de mosca azul (Phaenicia calliphoridae) en uno de los n??dulos de viruela, increment?!ndose as?- la posibilidad de transmisi??n mec?!nica del virus mediante moscas adultas contaminadas.

  5. [Prevalence of eating disorders in college students and associated factors: uniHcos project].

    PubMed

    Martínez-González, Leticia; Fernández Villa, Tania; Molina de la Torre, Antonio José; Ayán Pérez, Carlos; Bueno Cavanillas, Aurora; Capelo Álvarez, Rocío; Mateos Campos, Ramona; Martín Sánchez, Vicente

    2014-10-01

    Introducción: Los trastornos de la conducta alimentaria (TCA) son especialmente frecuentes en los jóvenes. Objetivo: Determinar la prevalencia de TCA en jóvenes universitarios y sus factores asociados. Metodología: Estudio de prevalencia en jóvenes universitarios españoles del proyecto uniHcos. Mediante regresión logística no condicional se determinó la magnitud de la asociación entre los factores de riesgo asociados al estilo de vida y padecer un TCA medido mediante el cuestionario Sick, Control, One, Fat, Food (SCOFF). Resultados: La prevalencia de TCA fue del 19,5%, siendo mayor en mujeres (ORa=1,59; p=0,006). En los chicos, tener criterios de padecer TCA se asoció con vivir en colegios mayores, con realizar “binge drinking”, y uso problemático de internet. En las mujeres el estudiar titulaciones diferentes a las ciencias de la salud (ORa=1,50) y el uso problemático de internet (ORa=2,33). Aquellas mujeres con riesgo de TCA presentaban con mayor frecuencia depresión (ORa=2,02), dolores menstruales (ORa=1,81) y mala salud percibida (ORa=1,70). En los hombres, aquellos con riesgo de TCA presentaban con mayor frecuencia una mala salud percibida (ORa=2,42). Conclusiones: El riesgo de obtener resultados positivos en el SCOFF en nuestro estudio es similar a lo publicado para otras poblaciones de estudiantes, así como su asociación con determinadas adicciones y problemas de salud. Se observaron diferencias en función del sexo que precisan atención en el diseño de estrategias de prevención y control.

  6. [The association between dietary macronutrients intake and obesity among children and adolescents; a case-control study].

    PubMed

    Martín-Calvo, Nerea; Ochoa, María Carmen; Marti, Amelia; Martínez-González, Miguel Ángel

    2013-01-01

    Introducción: La alta de prevalencia de obesidad infantil en España y sus posibles consecuencias hacen de esta enfermedad un problema prioritario de salud pública. Objetivo: Valorar, mediante un estudio epidemiológico analítico de casos y controles, la asociación entre la composición en macronutrientes de la dieta y la obesidad en una muestra de niños y adolescentes navarros de 5,5 a 18,8 años. Método: Se reclutaron 178 casos, niños y adolescentes obesos (índice de masa corporal > percentil 97) en Navarra. Los controles fueron emparejados individualmente según edad y sexo. Las medidas antropométricas fueron tomadas por personal entrenado utilizando métodos estandarizados. Se realizaron entrevistas individuales para recoger información sobre la frecuencia de consumo de alimentos mediante un cuestionario previamente validado a partir del que se calculó la ingesta de macronutrientes (hidratos de carbono, proteínas y grasas) y de los subtipos de grasas. Estos resultados se dividieron en quintiles de macronutrientes ajustados por ingesta energética total. Se realizó una regresión logística condicional para estimar odds ratios ajustadas de obesidad para cada uno de los cuatro quintiles superiores de consumo, usando el quintil inferior como referencia. Resultados: La composición de macronutrientes de la dieta era similar en casos y controles, excepto para las grasas poliinsaturadas, que se asociaron inversamente a la obesidad (p tendencia lineal < 0,01) con una odds ratio ajustada de 0,34 (IC 95%: 0,15 a 0,77) para el quinto quintil. Conclusiones: Nuestros resultados sugieren una asociación inversa entre una mayor ingesta de grasas poliinsaturadas y el riesgo de obesidad.

  7. [What kind of health information search the spinal cord injured patients from Spain on the internet?].

    PubMed

    Bea-Muñoz, Manuel; Medina-Sánchez, María; Flórez-García, Mariano

    2015-04-16

    Introduccion. Internet es una alternativa para la educacion sanitaria en la poblacion. Los lesionados medulares consultan la red sobre cuestiones de su salud. Objetivo. Conocer cuales son las fuentes de informacion, los temas sobre salud mas consultados y la confianza en el material obtenido de la red por un grupo de lesionados medulares espanoles usuarios de Internet. Pacientes y metodos. Realizamos una encuesta a lesionados medulares espanoles mediante un cuestionario en Google Drive. Se accedia a el mediante un enlace en la pagina de ASPAYM-Asturias. El cuestionario incluia datos epidemiologicos y cuestiones sobre Internet, fuentes de informacion y confianza en ellas. Resultados. Contestaron 121 lesionados medulares (el 64%, hombres), con una edad media de 45 anos. La etiologia predominante era la traumatica (70%), y en el 72%, las lesiones eran paraplejias. El 83% prefiere consultar al personal sanitario. Busca en Internet mas del 70% de la muestra, y lo hace en paginas web en espanol. El tema de mayor interes es el material ortopedico. El 27% confia mucho o bastante en la informacion de la red, mientras que el 32% lo hace poco o nada. Conclusiones. Los resultados nos aproximan al uso de Internet que hacen los lesionados medulares espanoles. Asumiendo el sesgo inherente en un estudio de este tipo, mas del 70% de la muestra consulta sobre su salud en la red, sobre todo en paginas web espanolas. El tema mas buscado es 'material ortopedico y sillas de ruedas'. Solo uno de cada cuatro confia en los contenidos de la red, y la mayoria prefiere consultar sus problemas de salud directamente con los profesionales sanitarios.

  8. Diagnostic value of contrast-enhanced ultrasonography in the characterization of ovarian tumors().

    PubMed

    Sconfienza, L M; Perrone, N; Delnevo, A; Lacelli, F; Murolo, C; Gandolfo, N; Serafini, G

    2010-03-01

    Sommario INTRODUZIONE: La ricchezza della componente vascolare dei tumori ginecologici influenza le caratteristiche dell'imaging diretto, utilizzando metodiche che evidenziano la componente macrovascolare delle lesioni (color e power Doppler), e di quello indiretto, mediante somministrazione di mezzi di contrasto (MdC) per lo studio del microcircolo e della perfusione interstiziale. Lo scopo di questo lavoro è di valutare l'aggiunta di informazioni diagnostiche fornite dalla valutazione ecografica con MdC nello studio delle lesioni ovariche. MATERIALI E METODI: Abbiamo valutato 72 lesioni annessiali in 61 pazienti con lesioni ovariche di incerta interpretazione mediante somministrazione di 4,8 ml di MdC ecoamplificatore di II generazione. Per ogni lesione, abbiamo valutato la morfologia basale, quella contrastografica e le curve intensità/tempo. RISULTATI: La valutazione post-contrasto confrontata con la basale non ha apportato informazioni aggiuntive morfovascolari in 8 pazienti (13,1%); in 38 pazienti (62,3%) ha apportato informazioni senza modifiche del comportamento clinico; in 15 soggetti (24,6%) ha apportato elementi che hanno modificato il comportamento clinico. Le lesioni maligne presentavano valori di tempo massimo di enhancement significativamente minori (11,9 ± 3,1 s vs 19,8 ± 4,0 s p < 0,01) e intensità di picco massimo significativamente maggiore (24,7 ± 4,2 dB vs 17,8 ± 3,3 dB p < 0,01) rispetto alle lesioni benigne. CONCLUSIONI: La CEUS consente di migliorare la confidenza diagnostica nelle lesioni liquide corpuscolate in cui l'indagine convenzionale non risulta dirimente, proponendosi nella diagnosi differenziale di un limitato numero di lesioni complesse, in alternativa a TC ed RM. Le informazioni ottenute influenzano tuttavia il successivo iter diagnostico e terapeutico in una limitata percentuale di casi (24,6%).

  9. ANDROGEN RECEPTOR CAG AND GGN REPEAT POLYMORPHISMS AND BONE MASS IN BOYS AND GIRLS.

    PubMed

    Rodríguez-Garcia, Lorena; Ponce-Gonzalez, Jesus G; González-Henriquez, Juan J; Rodriguez-Gonzalez, Francisco G; Díaz-Chico, Bonifacio N; Calbet, Jose A L; Serrano-Sanchez, José A; Dorado, Cecilia; Guadalupe-Grau, Amelia

    2015-12-01

    Introducción: el gen humano del receptor de androgenos (AR) posee dos repeticiones polimorficas de trinucleotidos (CAG y GGN) que afectan a la cantidad de proteina AR traducida. En este estudio, genotipamos esos tractos polimorficos en una muestra representativa de ninos caucasicos espanoles (Tanner ≤ 5), compuesta por 152 ninos (11.5 } 2.6 anos) y 116 ninas (10.1 } 3.2 anos) e investigamos su asociacion con la masa osea. Métodos: la longitud de las repeticiones CAG y GGN se determino mediante PCR y analisis de fragmentos. La composicion corporal se midio mediante absorciometria dual de rayos X (DXA). Los participantes fueron agrupados como CAG cortos (CAGS) si poseian una longitud de repeticiones ≤ 21 y CAG largos si esta era > 21. Ademas, los participantes se agruparon como GGN cortos (GGNS) si poseian una longitud de repeticiones ≤ 23 y GGN largos (GGNL) si esta era > 23. Resultados: en los ninos se encontraron diferencias en talla, peso corporal, densidad mineral osea (BMD) y contenido mineral oseo (BMC) del cuerpo entero, BMC de las extremidades superiores e inferiores, BMD del cuello del femur, BMC y BMD del triangulo de Ward’s y BMD de la espina lumbar entre los grupos CAGS y CAGL (P < 0,05). Ademas, el BMD de las extremidades superiores fue significativamente diferente entre los grupos GGNS y GGNL. Tras ajustar por variables confusoras, la unica diferencia que se mantuvo significativa fue la del BMD en las extremidades superiores entre los grupos GGNS y GGNL (P < 0,05). No se observaron diferencias entre los grupos CAG y GGN y la masa osea en las ninas. Conclusiones: nuestros resultados apoyan la hipotesis de que los alelos largos de los polimorfismos CAG y GGN del AR estan asociados con una mayor masa osea en ninos prepuberes.

  10. Laparoscopic resection of tailgut cysts: the size is not the issue.

    PubMed

    Dalmonte, Giorgio; Tartamella, Francesco; Mita, Maria Teresa; De Sario, Giuseppina; Roncoroni, Luigi; Marchesi, Federico

    2016-11-03

    Gli amartomi cistici retrorettali (Tailgut cysts) sono rare lesioni dello spazio presacrale che avendo rischio intrinseco di trasformazione maligna e recidiva sono normalmente trattate mediante asportazione chirurgica anche nel caso in cui siano asintomatiche. Negli ultimi vent’anni si sta affermando il trattamento mediante accesso addominale laparoscopico per la sua migliore esposizione delle strutture della pelvi e la sua minore invasività. In questo caso clinico presentiamo il trattamento del più grande amartoma cistico retrorettale asportato laparoscopicamente fino ad ora riportato in letteratura. Essendo nella maggior parte dei casi asintomatici, la diagnosi degli amartomi cistici retrorettali è spesso incidentale durante una visita medica di routine. Nel successivo studio è particolarmente indicata la RM per orientare la scelta dell’approccio chirurgico data la sua maggiore risoluzione nei tessuti molli e nella determinazione dell’invasività locale. La trasformazione maligna di queste lesioni si stima possa avvenire nel 14,1% dei casi, per questo l’exeresi chirurgica è la terapia di scelta. Tra i differenti approcci la tecnica transaddominale laparoscopica, se eseguita da chirurghi esperti nella chirurgia pelvica laparoscopica, garantisce la migliore visualizzazione degli organi pelvici e una minore morbidità. A causa del rischio di rottura e insemenzamento l’approccio laparoscopico non dovrebbe essere utilizzato in caso di sospetta malignità della lesione cistica. Il nostro caso corrobora la validità del trattamento laparoscopico degli amartomi cistici retrorettali, anche quando possiedono dimensioni considerevoli. Lo studio preo-peratorio è quindi cruciale per determinare la possibile malignità della lesione ed eseguire in tal caso un approccio laparotomico.

  11. Hypoalbuminemia and oxidative stress in patients on renal hemodialysis program.

    PubMed

    de Castro, Laís Lima; de Carvalho e Martins, Maria do Carmo; Garcez, Anderson Mendes; Pacheco, James Frederico Rocha; Cunha, Francisco Valmor Macedo; Moita Neto, José Machado; de Freitas, Manoela Carine Lima; de Melo Cunha, Luan Arnon

    2014-10-01

    Introducción: La albumina se considera una molecula antioxidante extracelular importante. La hipoalbuminemia es un predictor fuerte e independiente de mortalidad en pacientes en hemodialisis. El presente estudio evaluo la relacion entre hipoalbuminemia y el estres oxidativo mediante la comparacion de la actividad de la superoxido dismutasa, la peroxidacion lipidica y el consumo de micronutrientes antioxidantes en pacientes con insuficiencia renal cronica. Métodos: Este estudio de casos y controles se llevo a cabo con 64 pacientes de ambos sexos de 18 a 59 anos. Los pacientes con hipoalbuminemia (ALB < 3,5 g / dL) se definieron como los casos (n = 26) y el grupo control (n = 38) aquellos con ALB ≥ 3,5 g/dL. Fueran realizadas determinaciones de la actividad de la superoxido dismutasa en los eritrocitos, la produccion de oxido nitrico por la contraccion de nitrito e concentracion de malondialdehido (MDA) en plasma, el perfil de lipidos en plasma, la ingesta de proteinas y micronutrientes antioxidantes se realizaron. Para las comparaciones entre grupos, se utilizo la prueba t de Student. Posibles asociaciones entre variables se analizaron mediante el test de correlacion lineal y Pearson y en la prueba de chi-cuadrado. Resultados: El consumo de cobre fue significativamente menor (p < 0,05) para el grupo con hipoalbuminemia. Correlaciones entres las concentraciones de albumina y el uso de cobre (r = 0,280). Se encontro correlacion negativa entre las concentraciones de albumina y MDA. Conclusión: La hipoalbuminemia se asocia con aumento de la peroxidacion lipidica, y puede contribuir al estres oxidativo en pacientes con insuficiencia renal cronica. Ademas, los pacientes con enfermedad renal cronica sometidos a hemodialisis evaluados en este estudio habian reducido el consumo de cobre.

  12. [PREVALENCE OF THINNESS, OVERWEIGHT AND OBESITY AMONG 4-TO-6-YEAR-OLD SPANISH SCHOOLCHILDREN IN 2013; SITUATION IN THE EUROPEAN CONTEXT].

    PubMed

    González García, Alberto; Álvarez Bueno, Celia; Lucas de la Cruz, Lidia; Sánchez López, Mairena; Solera Martínez, Montserrat; Díez Fernández, Ana; Martínez Vizcaíno, Vicente

    2015-10-01

    Introducción y objetivos: tanto el exceso de peso como la delgadez se relacionan con diversos problemas de salud que pueden continuar hasta la edad adulta. Los objetivos de este estudio fueron estimar la prevalencia de delgadez, sobrepeso y obesidad en escolares de 4-6 años de las provincias de Cuenca y Ciudad Real (España), mediante criterios del Grupo Internacional de Trabajo sobre Obesidad y de la Organización Mundial de la Salud, y comparar estas cifras con otros estudios europeos. Métodos: estudio observacional-transversal que incluyó a 1.585 escolares realizado en septiembre de 2013. Las mediciones de peso y talla fueron realizadas por enfermeras entrenadas y mediante procedimientos estandarizados. El estatus ponderal se definió según los criterios del Grupo Internacional de Trabajo sobre Obesidad y la Organización Mundial de la Salud. Resultados: según criterios del Grupo Internacional de Trabajo sobre Obesidad, la prevalencia de delgadez, sobrepeso y obesidad fue del 20,51%, 11,84% y 8,58%, respectivamente; y del 3,97%, 13,92% y 10,79% cuando se utilizaron los criterios de la Organización Mundial de la Salud. No se encontraron diferencias estadísticamente significativas por sexo ni provincia para ninguna categoría de estatus ponderal. Para ambos criterios, la prevalencia de delgadez fue menor a medida que aumentaba la edad, mientras que la prevalencia de sobrepeso/obesidad fue mayor. Conclusiones: la prevalencia de exceso de peso podría haber tocado techo en España, aunque continúa siendo un importante problema de salud pública. El aumento de la prevalencia de bajo peso debería ocupar un lugar relevante en las intervenciones de salud pública.

  13. The influence of body composition on quality of life of patients with breast cancer.

    PubMed

    Porciúncula Frenzel, Aline; Aberici Pastore, Carla; González, Maria Cristina

    2013-01-01

    Introducción: Los cambios no deseados en la composición corporal, así como el impacto de éstos en la calidad de vida de esta población, han sido poco investigados. Objetivo: Evaluar el rol de la composición corporal en la calidad de vida, y el impacto de la quimioterapia en ambos, en mujeres con cáncer de mama. Métodos: Se evaluaron prospectivamente las mujeres con cáncer de mama en una cohorte de pacientes sometidos a quimioterapia. La composición corporal se estimó mediante la impedancia bioeléctrica. La calidad de vida se evaluó mediante el cuestionario de calidad de vida de la Organización Mundial de la Salud. Resultados: Se evaluaron 70 mujeres, de las cuales el 77 y 73% tuvieron inicialmente sobrepeso y exceso de grasa corporal, respectivamente. Se observó un aumento significativo en la masa libre de grasa (p < 0,001), el índice de masa corporal (P = 0,03) y el peso (p = 0,02), mientras que la calidad de vida se mantuvo igual durante el período. Por otra parte, las mujeres con exceso de grasa corporal, mostraron una puntuación general de salud inicial significativamente menor, en comparación con aquellas con grasa corporal normal (p = 0,02). Conclusiones: La quimioterapia ha demostrado ser un inductor potencial del incremento de peso en esta población. Destacamos la importancia de nuevas investigaciones sobre el impacto de la acumulación de grasa corporal en la calidad de vida de estas mujeres.

  14. [Predictors of the recovery of cognitive functions in patients with traumatic brain injury].

    PubMed

    Solís-Marcos, I; Castellano-Guerrero, A M; Domínguez-Morales, R; León-Carrión, J

    2014-04-01

    Introduccion. Tras un traumatismo craneoencefalico (TCE), el funcionamiento cognitivo de los pacientes puede resultar gravemente alterado. Diversos estudios han tratado de identificar las variables que mejor predicen su recuperacion. Objetivos. Evaluar la recuperacion funcional cognitiva de pacientes con TCE tras un programa de neurorrehabilitacion e identificar las variables predictoras de dicha recuperacion. Pacientes y metodos. Estudio pre-post retrospectivo de 58 pacientes adultos con TCE que realizaron un programa de rehabilitacion intensivo. Todos fueron evaluados mediante la subescala de funcionalidad cognitiva de la medida de la independencia funcional + medida de la evaluacion de la funcionalidad (FIM+FAM), al inicio y al final de la rehabilitacion. Ambas puntuaciones fueron comparadas mediante la prueba no parametrica de Wilcoxon. Se calculo el porcentaje de ganancia funcional cognitiva y se correlaciono con todas las variables recogidas. A partir de toda la informacion clinica, demografica y cognitiva recogida, realizamos un analisis de regresion lineal multiple para identificar los mejores predictores de dicha ganancia. Resultados. La funcionalidad cognitiva aumento significativamente del 33,6% al 85% (p < 0,01). Los pacientes con mayor porcentaje de ganancia funcional cognitiva fueron aquellos con menor edad y periodo post-TCE, y mayores puntuaciones en la subescala cognitiva de la FIM+FAM y en las pruebas de atencion condicional y curva de aprendizaje de Luria. Los mejores predictores de la recuperacion funcional fueron el periodo post-TCE y la funcionalidad cognitiva al inicio (R2 ajustado = 55,8%). Conclusiones. El comienzo temprano de la rehabilitacion y la mayor funcionalidad cognitiva al inicio resultaron ser los mejores predictores de la recuperacion funcional cognitiva. Otras variables, como la edad o puntuaciones en pruebas cognitivas, tambien deben considerarse en futuros estudios.

  15. [Sarcopenia intervention with progressive resistance training and protein nutritional supplements].

    PubMed

    Palop Montoro, M Victoria; Párraga Montilla, Juan Antonio; Lozano Aguilera, Emilio; Arteaga Checa, Milagros

    2015-04-01

    Introducción: El envejecimiento viene acompañado de cambios en la composición corporal entre los que se encuentra una reducción progresiva de la masa muscular, que puede contribuir al desarrollo de limitaciones funcionales en las personas mayores, y donde el estilo de vida juega un papel de especial relevancia. Objetivos: Comprobar la efectividad del entrenamiento de resistencia progresiva, los suplementos nutricionales proteicos y ambas intervenciones combinadas en el tratamiento de la sarcopenia. Método: Revisión de la literatura en las bases de datos Medline, ScienceDirect, CINAHL, ISI WOK y PEDro, mediante la combinación de los descriptores del Medical Subjects Headings (MeSH) referentes a sarcopenia, entrenamiento de fuerza progresiva, suplementos proteicos y personas mayores. Resultados: Un total de 147 estudios fueron encontrados los cuales realizaban ejercicio de resistencia, mediante sesiones de 45-60 minutos, 2-3 veces por semana, y 3-4 series de 8 repeticiones, a una intensidad creciente. Este ejercicio produjo un aumento de la masa muscular y la fuerza, así como incremento en la síntesis de proteínas musculoesqueléticas y tamaño de la fibra muscular. Los suplementos nutricionales tales como el beta-hidroxi-beta-metilbutirato, la leucina y los aminoácidos esenciales produjeron beneficios en la masa muscular. Todos los suplementos aumentaron la fuerza, especialmente cuando se combinaron con el ejercicio de resistencia. Conclusión: La combinación del entrenamiento de resistencia progresiva y las proteínas incluidas en la dieta, o bien en forma de suplementos nutricionales, refuerza los efectos que cada una de estas intervenciones puede tener en el tratamiento de la sarcopenia en las personas mayores.

  16. [Phenotypic variability of the 1q21.1 microdeletion syndrome in members of the same family: relevance of detection of neuropsychiatric disorders for diagnosis of genetic syndromes].

    PubMed

    Natera-De Benito, Daniel; Vidal-Esteban, Arantxa; Sanchez-Del Pozo, Jaime; Moreno-Garcia, Marta; Suela-Rubio, Javier; Cruz-Rojo, Jaime; Rivero-Martin, María José

    2015-12-16

    Introduccion. El sindrome de microdelecion 1q21.1 esta causado por una delecion recurrente de aproximadamente 800 kb que incluye al menos siete genes y se asocia a un fenotipo variable. Esta variacion en el numero de copias patogenica puede aparecer de novo o ser heredada de uno de los progenitores. La presencia de trastornos psiquiatricos se ha descrito en muchos de los casos publicados, pero se desconoce su prevalencia exacta. Objetivo. Exponer la variabilidad fenotipica de los individuos que presentan una microdelecion 1q21.1. Casos clinicos. Se incluyen cuatro individuos portadores de una delecion de 1,74 Mb en 1q21.1, todos miembros de la misma familia. El estudio genetico del caso indice se llevo a cabo mediante array de hibridacion genomica comparada, y el del resto de familiares mediante hibridacion in situ fluorescente, con una sonda especifica para la region delecionada. Los individuos presentan un fenotipo heterogeneo, y es comun a todos ellos la presencia de alteraciones psiquiatricas o del comportamiento, con un claro predominio de la presencia de trastornos relacionados con las dificultades para el control de impulsos en sus diferentes subtipos. Conclusiones. El sindrome de microdelecion 1q21.1 es fenotipicamente heterogeneo, incluso entre los miembros de una misma familia. Destaca la presencia de alteraciones psiquiatricas o del comportamiento como rasgo comun en todos los pacientes que presentamos. Existen formas paucisintomaticas en las que el individuo portador de la delecion presenta exclusivamente alteraciones psiquiatricas.

  17. [Prevalence of eating disorders in adolescents from Gran Canaria].

    PubMed

    Álvarez-Malé, María Luisa; Bautista Castaño, Inmaculada; Serra Majem, Lluis

    2015-05-01

    Objetivos: evaluar la prevalencia de trastornos de la conducta alimentaria en estudiantes con edades comprendidas entre los 12 a 20 años mediante medidas estandarizadas. Material y métodos: se seleccionaron al azar un total de 1342 participantes de centros educativos de la isla de Gran Canaria, España. Se empleó un diseño transversal de dos fases que incluía un primer cuestionario de cribado (EAT-40 con el punto de corte establecido en 20) y una entrevista clínica semi-estructurada (EDE). También se evaluaron variables sociodemográficas y el estado ponderal de los alumnos. Resultados: en el año 2013 estudiamos a participantes de 15 centros educativos de Gran Canaria. En la primera fase se halló una prevalencia de riesgo de 27,42% (33% de mujeres, 20,6% de hombres). En la segunda fase, 538 participantes accedieron a ser evaluados mediante entrevista clínica (285 en riesgo, con altas puntuaciones en el EAT; 253 seleccionados del grupo sin riesgo). La prevalencia global de trastorno de la conducta alimentaria fue de 4,11% (5,46% de mujeres, 2,55% de hombres). Empleando los criterios diagnósticos del DSM-IV-TR, la prevalencia para la anorexia nerviosa fue de 0,19%, para la bulimia nerviosa de 0,57% y para el trastorno de la conducta alimentaria no especificado de 3,34%. Conclusiones: la prevalencia diagnóstica de trastornos de la conducta alimentaria en Gran Canaria es similar a la del resto de España. Sin embargo, la prevalencia de riesgo de desarrollar dichos trastornos es especialmente elevada en Gran Canaria, teniendo en cuenta los datos de estudios tanto nacionales como internacionales.

  18. [Brainstem auditory evoked potentials and somatosensory evoked potentials in Chiari malformation].

    PubMed

    Moncho, Dulce; Poca, María A; Minoves, Teresa; Ferré, Alejandro; Rahnama, Kimia; Sahuquillo, Juan

    2013-06-16

    Introduccion. La malformacion de Chiari (MC) incluye una serie de anomalias congenitas que tienen como comun denominador la ectopia de las amigdalas del cerebelo por debajo del foramen magno, lo que puede condicionar fenomenos compresivos del troncoencefalo, la medula espinal alta y los nervios craneales, alterando las respuestas de los potenciales evocados auditivos del tronco cerebral (PEATC) y de los potenciales evocados somatosensoriales (PESS). Sin embargo, las indicaciones de ambas exploraciones en las MC han sido motivo de estudio en un numero limitado de publicaciones, centradas en series cortas y heterogeneas de pacientes. Objetivo. Revisar los hallazgos de los PEATC y los PESS en los estudios publicados en pacientes con MC tipo 1 (MC-1) o tipo 2 (MC-2), y su indicacion en el diagnostico, tratamiento y seguimiento, especialmente en la MC-1. Desarrollo. Es un estudio de revision realizado mediante analisis de los estudios publicados en Medline desde 1966, localizados mediante PubMed, utilizando combinaciones de las palabras clave 'Chiari malformation', 'Arnold-Chiari malformation', 'Chiari type 1 malformation', 'Arnold-Chiari type 1 malformation', 'evoked potentials', 'brainstem auditory evoked potentials' y 'somatosensory evoked potentials', asi como informacion de pacientes con MC-1 valorados en los servicios de neurocirugia y neurofisiologia clinica del Hospital Universitari Vall d'Hebron. Conclusiones. Los hallazgos mas comunes de los PESS son la reduccion en la amplitud cortical para el nervio tibial posterior, la reduccion o ausencia del potencial cervical del nervio mediano y el aumento del intervalo N13-N20. En el caso de los PEATC, los hallazgos mas frecuentes descritos son el aumento del intervalo I-V y la alteracion periferica o coclear.

  19. Desarrollo de un instrumento para medir percepciones sobre el contexto de construccion del conocimiento cientifico de estudiantes universitarios de nuevo ingreso

    NASA Astrophysics Data System (ADS)

    Garcia-Ramirez, Jaime Antonio

    En esta investigacion, se desarrollo un instrumento que permite medir percepciones relacionadas al contexto de constriccion del conocimiento cientifico. Se examinaron instrumentos existentes y se encontro que el VOSTS (Views on science, technology, and society), instrumento desarrollado empiricamente en Canada por Aikenhead, Ryan y Fleming, podia traducirse y validarse en el contexto cultural puertorriqueno. El instrumento es extenso, consta de 113 reactivos, cada uno con una premisa basica relacionada a la tematica ciencia, tecnologia y sociedad y un numero de alternativas relacionadas a la premisa que oscila entre siete y trece. Se delimito su utilizacion a los quince reactivos identificados por los autores como relacionados a la construccion social del conocimiento cientifico. Metodologicamente, se procedio a utilizar el modelo de adaptacion intercultural, que permite que el instrumento desarrollado satisfaga las dimensiones de equivalencia semantica, de contenido, tecnica, de criterio y conceptual, atemperado asi al instrumento original. Se cumplio con este proposito mediante la traduccion de la version original en ingles al espanol y viceversa. Se utilizaron comites para examinar la traduccion y la retro-traduccion del instrumento. Se realizo una prueba piloto con estudiantes universitarios de nuevo ingreso, utilizando el instrumento traducido para asegurar su intelegibilidad. La confiabilidad del instrumento se determino mediante la intervencion de un panel de expertos quienes clasificaron las distintas posiciones dentro de cada reactivo en: realista, con merito e ingenua; se transformaron estas opciones en valores numericos lo que permitio establecer una escala Likert para cada una. Se suministro el instrumento a una muestra de estudiantes universitarios de nuevo ingreso con caracteristicas similares a las de la poblacion puertorriquena en cuanto a ejecucion en las pruebas de aptitud verbal y matematica del College Board. Los resultados de sus contestaciones

  20. Sonographic evaluation of the temporomandibular joints in juvenile idiopathic arthritis().

    PubMed

    Melchiorre, D; Falcini, F; Kaloudi, O; Bandinelli, F; Nacci, F; Matucci Cerinic, M

    2010-03-01

    Sommario INTRODUZIONE: L'artrite Idiopatica giovanile (AIG) determina alterazioni a carico della testa condilare dell'articolazione temporomandibolare (ATM). Nell'esordio oligo-articolare (OA) l'interessamento dell'ATM viene spesso trascurato perchè può essere asintomatico. Lo scopo di questo studio è quello di valutare la presenza di versamento intrarticolare (V) dell'ATM, mediante esame ecografico (US), nelle fasi precoci di malattia. MATERIALE E METODI: Sono stati studiati 68 bambini (57 bambine e 11 bambini, di età compresa tra 9,1 e 16, anni, età media: 11,02 ± 4,2 mesi) con AIG ad esordio OA. I pazienti (pz) erano sintomatici quando uno dei quattro sintomi seguenti era presente: 1) dolore ricorrente (a riposo o durante il movimento di apertura della bocca); 2) presenza di scrosci articolari; 3) presenza di limitazione nell'apertura della bocca; 4) locking intermittente. US è stato eseguito su entrambe le ATM sia in fase statica che dinamica, mediante ecografo General Electric (LOGIQ7) con sonda lineare (8,5 MHz) posizionata lungo l'asse maggiore del ramo condilare. Il V era presente quando lo spessore della capsula articolare era ≥1,5 mm. RISULTATI: 46/68 (68%) hanno presentato V a carico delle ATM; in 16 (35%) il V era bilaterale. 2/46 con V erano sintomatici, mentre in 44 non erano presenti sintomi. CONCLUSIONI: Questi dati suggeriscono che un'alta percentuale di bambini e giovani adulti con AIG ad esordio OA, nella fase iniziale della malattia, presenta un interessamento flogistico delle ATM anche in assenza di sintomi. L'US, non invasivo e facilmente ripetibile, ci offre importanti informazioni sul coinvolgimento articolare delle ATM ed è risultato utile nella diagnosi all'esordio.

  1. Validation of maternal cardiac output assessed by transthoracic echocardiography against pulmonary artery catheterization in severely ill pregnant women: prospective comparative study and systematic review.

    PubMed

    Cornette, J; Laker, S; Jeffery, B; Lombaard, H; Alberts, A; Rizopoulos, D; Roos-Hesselink, J W; Pattinson, R C

    2017-01-01

    ámicos serios, debido a los cuales existe la necesidad de sistemas validados de monitorización hemodinámica para mujeres embarazadas. Aunque la cateterización de la arteria pulmonar (CAP) mediante termodilución es el patrón de referencia clínico para la medición del gasto cardíaco (GC), este método se usa con poca frecuencia debido a su naturaleza invasiva. La ecocardiografía transtorácica (ETT) permite la determinación no invasiva del GC. El objetivo de este estudio fue validar la ETT frente al CAP para determinar el GC en mujeres embarazadas gravemente enfermas. MÉTODOS: Este estudio consistió en un metaanálisis que combinó datos de un estudio prospectivo y una revisión sistemática. El estudio prospectivo se llevó a cabo en Pretoria (Sudáfrica) en 2003. Se incluyeron mujeres con complicaciones graves en el embarazo que requerían una monitorización invasiva mediante CAP según las directrices de ese momento. Se realizó una ETT en un plazo de 15 minutos de haber realizado el CAP y el investigador no tuvo acceso a las mediciones del CAP. Las mediciones comparativas se extrajeron de estudios similares obtenidos a partir de una revisión sistemática de la literatura y se añadieron a una base de datos. Se compararon las mediciones simultáneas del GC mediante ETT y CAP. La concordancia entre métodos se evaluó a través del método estadístico de Bland-Altman y de coeficientes de correlación intraclase (CCI). Se incluyeron treinta y cuatro mediciones comparativas en el metaanálisis. Los valores medios del GC obtenidos mediante CAP y ETT fueron de 7,39 l/min y 7.18 l/min, respectivamente. El sesgo fue de 0,21 l/min, siendo los límites inferior y superior de la concordancia de -1,18 l/min y 1.60 l/min; el error porcentual fue del 19,1%, y el CCI entre ambos métodos fue de 0,94. Las mediciones del GC en mujeres embarazadas mediante ETT muestran una excelente concordancia con las obtenidas mediante CAP. Dada su naturaleza no invasiva y su

  2. Investigação dos perfís temporais de alta resolução de explosões solares tipo-III decimétricas

    NASA Astrophysics Data System (ADS)

    Cecatto, J. R.; Fernandes, F. C. R.; Sawant, H. S.; Madsen, F. R. H.

    2003-08-01

    Explosões solares tipo-III indicam a presença de feixes de elétrons acelerados durante "flares" solares. Sua investigação fornece informações tanto sobre os processos de aceleração de partículas quanto das características do agente causador e do local de aceleração. Explosões tipo-III decimétricas são geradas por feixes de elétrons viajando através de arcos magnéticos densos da baixa coroa solar. Os perfís temporais destes fenômenos, quando tomados com alta resolução, informam sobre os mecanismos de aceleração de partículas do feixe e o meio de transporte da energia liberada a partir da região de aceleração. Usando o Brazilian Solar Spectroscope (BSS), em operação no INPE, foram registradas dezenas de explosões tipo-III decimétricas, dentro da faixa de 2050-2250 MHz com alta resolução temporal (20 ms), em 13 de setembro de 2001, entre 13:00 e 16:10 UT. Foram selecionadas 10 explosões isoladas para uma investigação estatística detalhada de seus perfís temporais, em todos os cerca de 50 canais de freqüência. Os resultados indicam que cerca de 70% dos perfís temporais são complexos tanto durante a subida quanto descida. Os 30% restantes indicam que os perfís da subida podem ser bem representados, na maioria dos casos, por um processo não-linear e uma parcela significativa por processos lineares. Os perfís temporais da descida são dominados por um decaimento não-linear. Neste trabalho, será efetuada uma análise dos perfís temporais, tanto durante a subida quanto descida do fluxo, para as explosões selecionadas, em termos dos prováveis mecanismos de aceleração e relaxamento. 2

  3. Determinação de regiões de órbitas diretas estáveis ao redor da Lua

    NASA Astrophysics Data System (ADS)

    de Melo, C. F.; Winter, O. C.; Vieira Neto, E.

    2003-08-01

    Neste Trabalho estamos investigando regiões do sistema Terra-Lua que contêm órbitas diretas estáveis ao redor da Lua visando a utilização destas órbitas em futuras missões de veículos espaciais como alternativas de trajetórias com baixo custo de manutenção. Adotando-se o problema restrito de três corpos, Terra-Lua-partícula, a localização e a extensão destas regiões de estabilidade foram investigadas numericamente considerando como estável toda órbita que permanece ao redor a Lua por, no mínimo, 1000 dias com energia de dois corpos da partícula em relação à Lua negativa. A estabilidade de tais regiões está associada a duas famílias de órbitas periódicas simples H1 e H2 e a órbitas quase-periódicas associadas a elas. Uma vez identificadas as regiões de estabilidade passamos a analisá-las introduzindo, paulatinamente, outras interações relevantes ao sistema como as perturbações do Sol (via problema restrito de quatro corpos), das marés, da pressão de radiação e do achatamento terrestre. Os resultados encontrados até o momento mostram que a perturbação do Sol é a única que reduz significativamente o tamanho das regiões de estabilidade. Também estamos investigando o comportamento de tais regiões quando características intrínsecas do sistema como as excentricidades das órbitas da Terra e da Lua e a inclinação da órbita Lua são consideradas. Com este estudo estamos reunindo informações que nos permitirão compreender a evolução das regiões de estabilidade no sistema Terra-Lua, bem como estabelecer parâmetros adequados para a utilização das trajetórias estáveis em futuras missões espaciais. Agradecimentos: Este projeto conta com o apoio do CNPq, da Capes e da Fapesp.

  4. Captura de satélites durante a formação de Júpiter

    NASA Astrophysics Data System (ADS)

    Winter, O. C.; Vieira Neto, E.; Yokoyama, T.

    2003-08-01

    O planeta Jupiter apresenta um grande número de satélites irregulares. As características das órbitas destes objetos indicam que os mesmos não teriam se formado ao redor do planeta que se encontram. As teorias existentes são de que estes objetos teriam se formado em uma região distante do planeta e sua evolução dinâmica os teria levado a uma captura gravitacional pelo planeta. Tendo em vista que o processo de captura gravitacional sem efeitos dissipativos não produz uma captura permanente, estudamos o processo de captura durante o estágio de formação do planeta. Realizamos simulações numéricas para os casos de satélites prógrados e retrógrados que inicialmente se encontram ao redor de Jupiter com sua massa atual e então, evoluimos a integração voltando no tempo de modo que o planeta sofra uma redução em sua massa (de 100% para 10% de sua massa atual) e verificamos o instante em que o satélites escapa do planeta (quando sua energia do problema de dois corpos se torna positiva). Assim, analisando o problema inverso no tempo, obtivemos em qual estágio de formação de Jupiter aquele hipotético satélite teria sido capturado. Os resultados mostram que os satélites retrógrados são capturados assim que entram na região delimitada pela esfera de Hill do planeta, enquanto que os satélites prógrados só são capturados quando entram numa região bem mais próxima ao planeta, uma fração da esfera de Hill.

  5. The impact of Mount Etna's sulphur emissions to the atmospheric composition, aerosol properties and radiative transfer in the central Mediterranean: 14 years of statistic analysis using observations and Lagrangian modelling

    NASA Astrophysics Data System (ADS)

    Sellitto, Pasquale; Zanetel, Claudia; di Sarra, Alcide; Salerno, Giuseppe; Tapparo, Andrea; Briole, Pierre; Legras, Bernard

    2016-04-01

    Volcanic eruptions influence tropospheric and stratospheric composition, the Earth's radiation budget from the regional to the global scale, and then the Earth's climate. While the impact of the strong explosive eruptions reaching the stratosphere is relatively well known, the influence of the more frequent weak volcanic activity, including passive degassing, on the tropospheric aerosol properties and on the radiation budget is still largely unknown. Most of the radiative effects of moderate eruptions are associated with changes of the aerosol size distribution, composition, and shape. Emission of primary particles, mainly ash, and secondary aerosols through gas-to-particle conversion of volatile sulphur compounds contribute to affect the aerosol properties. Mount Etna's continuous degassing and episodic explosive eruptions is an important source of particles and gases for the Mediterranean atmosphere, with, e.g., ten times larger emissions of volatile sulphur compounds than the anthropogenic sulphur emissions in the Mediterranean area. The impact of Mount Etna on the atmospheric composition, the aerosol chemical, microphysical and optical properties, the clouds occurrence and properties, the radiative balance and the regional climate in the Mediterranean are not known and probably underestimated. In this contribution, the downwind impact of Mount Etna's sulphur emissions in the central Mediterranean is estimated over the period 2000-2013 using long-term series of sulphur dioxide column and Ångströms exponent observations at the the ENEA (Ente Nazionale per l'Energia e l'Ambiente) Station for Climate Observations on the small island of Lampedusa (35.5°N, 12.6°E). These observations are linked to the information on the volcanic source, in terms of 1) the local dynamics, using a long series of trajectories and plume dispersion information obtained with the FLEXPART Lagrangian mode, and 2) the emission strength, using the long-term series of daily sulphur dioxide

  6. Controle orbital de satélites artificiais com propulsão e uso de gravidade lunar

    NASA Astrophysics Data System (ADS)

    Torres, K. S.; de Almeida Prado, A. F. B.

    2003-08-01

    A redução do custo de combustível de uma manobra é atualmente a grande prioridade de todos os programas espaciais existentes no mundo. As manobras assistidas pela gravidade são uma ótima forma de se contornar o problema pois proporcionam economias com vasto impacto no custo final da missão. Neste trabalho é feito um estudo particular do controle orbital de um satélite artificial da Terra usando a gravidade da Lua. O objetivo é estudar uma técnica econômica para uma mudança de plano de um satélite que está em órbita em volta da Terra. A idéia principal desta abordagem é enviar primeiramente o veículo espacial em direção à Lua usando uma manobra mono-impulsiva para que assim o campo gravitacional da Lua possa fazer a mudança de plano desejada (sem custo de combustível) e só então retornar o veículo aos valores iniciais de semi-eixo e excentricidade usando uma manobra bi-impulsiva tipo Hohmann. Para tanto, é assumido que a espaçonave inicia em uma órbita circular coplanar à órbita da lua em torno da Terra e a meta é colocá-la em uma órbita similar que difere da órbita inicial somente pela inclinação. São usadas equações analíticas baseadas na abordagem Patched Conics para se calcular a variação na velocidade, momento angular, energia e inclinação do veículo espacial que realiza esta manobra. Várias simulações são feitas para se avaliar as economias de combustível envolvidas.

  7. Atmospheric environmental implications of propulsion systems

    NASA Technical Reports Server (NTRS)

    Mcdonald, Allan J.; Bennett, Robert R.

    1995-01-01

    Three independent studies have been conducted for assessing the impact of rocket launches on the earth's environment. These studies have addressed issues of acid rain in the troposphere, ozone depletion in the stratosphere, toxicity of chemical rocket exhaust products, and the potential impact on global warming from carbon dioxide emissions from rocket launches. Local, regional, and global impact assessments were examined and compared with both natural sources and anthropogenic sources of known atmospheric pollutants with the following conclusions: (1) Neither solid nor liquid rocket launches have a significant impact on the earth's global environment, and there is no real significant difference between the two. (2) Regional and local atmospheric impacts are more significant than global impacts, but quickly return to normal background conditions within a few hours after launch. And (3) vastly increased space launch activities equivalent to 50 U.S. Space Shuttles or 50 Russian Energia launches per year would not significantly impact these conclusions. However, these assessments, for the most part, are based upon homogeneous gas phase chemistry analysis; heterogeneous chemistry from exhaust particulates, such as aluminum oxide, ice contrails, soot, etc., and the influence of plume temperature and afterburning of fuel-rich exhaust products, need to be further addressed. It was the consensus of these studies that computer modeling of interactive plume chemistry with the atmosphere needs to be improved and computer models need to be verified with experimental data. Rocket exhaust plume chemistry can be modified with propellant reformulation and changes in operating conditions, but, based upon the current state of knowledge, it does not appear that significant environmental improvements from propellant formulation changes can be made or are warranted. Flight safety, reliability, and cost improvements are paramount for any new rocket system, and these important aspects

  8. Analysis of shadowing effects on MIR photovoltaic and solar dynamic power systems

    NASA Astrophysics Data System (ADS)

    Fincannon, James

    1995-05-01

    The NASA Lewis Research Center is currently working with RSC-Energia, the Russian Space Agency, and Allied Signal in developing a flight demonstration solar dynamic power system. This type of power system is dependent upon solar flux that is reflected and concentrated into a thermal storage system to provide the thermal energy input to a closed-cycle Brayton heat engine. The solar dynamic unit will be flown on the Russian Mir space station in anticipation of use on the International Space Station Alpha. By the time the power system is launched, the Mir will be a spatially complex configuration which will have, in addition to the three-gimbaled solar dynamic unit, eleven solar array wings that are either fixed or track the Sun along one axis and a variety or repositionable habitation and experiment modules. The proximity of arrays to modules creates a situation which makes it highly probable that there will be varying solar flux due to shadowing on the solar dynamic unit and some of the arrays throughout the orbit. Shadowing causes fluctuations in the power output from the arrays and the solar dynamic power system, thus reducing the energy capabilities of the spacecraft. An assessment of the capabilities of the power system under these conditions is an important part in influencing the design and operations of the spacecraft and predicting its energy performance. This paper describes the results obtained from using the Orbiting Spacecraft Shadowing Analysis Station program that was integrated into the Station Power Analysis for Capability Evaluation (SPACE) electrical power system computer program. OSSA allows one to consider the numerous complex factors for analyzing the shadowing effects on the electrical power system including the variety of spacecraft hardware geometric configurations, yearly and daily orbital variations in the vehicle attitude and orbital maneuvers (for communications coverage, payload pointing requirements and rendezvous/docking with other

  9. Reconstrução tridimensional de arcos magnéticos por tomografia

    NASA Astrophysics Data System (ADS)

    Simões, P. J. A.; Costa, J. E. R.

    2003-08-01

    Uma explosão solar é uma variação súbita do brilho que ocorre nas regiões ativas da atmosfera solar. Estas regiões são constituídas por um plasma magnetizado com intensa indução magnética e em cenários bem complexos como visto recentemente através de experimentos embarcados em satélites operando instrumentos em raios X moles e ultra-violeta distante. A energia magnética, que pode ser armazenada por um período de horas até dias em configurações magnéticas estressadas, é subitamente lançada na atmosfera solar e transferida para partículas como elétrons, prótons e núcleos pesados, que são acelerados e/ou aquecidos, produzindo radiação eletromagnética. A proposta final deste projeto é determinar as características espaciais de alta resolução da emissão e polarização girossincrotrônica de explosões solares em ambientes complexos de campos magnéticos. Os recentes resultados da emissão difusa em EUV apresentado pelos satélites TRACE e SOHO dos arcos magnéticos conectando as diferentes polaridades magnéticas sobre as regiões ativas possibilitam novas abordagens sobre o papel do campo magnético na emissão em rádio. Nesta etapa apresentamos os resultados da reconstrução da geometria tridimensional das linhas de força destes arcos utilizando técnicas tomográficas, a partir de imagens de alta resolução espacial obtidas pelo instrumento EIT (Extreme ultraviolet Imaging Telescope), além da modelagem das induções magnéticas por um campo dipolar e as densidades de partículas aceleradas. Utilizamos para a reconstrução geométrica, imagens tomadas em vários ângulos dos arcos devido à rotacão solar. Com estes resultados, daremos continuidade ao projeto, com os cálculos da transferência radiativa nos modos ordinário e extraordinário de propagação da radiação girossincrotrônica de explosões solares.

  10. Kinetic Alfven Waves and the Depletion of the Thermal Population in Extragalactic Jets

    NASA Astrophysics Data System (ADS)

    Jafelice, L. C.; Opher, R.

    1990-11-01

    RESUMEN. Chorros Extragalacticos (CE) y Fuentes Radio Extendidas (FRE) son locales de ricos y complejos procesos de plasma magnetizado. Recien tes observaciones indican que esas fuentes son estructuradas en filamen tos. Nos concentramos aqui en el analisis de dos problemas: 1) el prob[e ma de injecci6n,queespropuesto porlas teorias de aceleraci6n de p ? las en plasmas de CE e FRE, que necesitan partfculas que ya tengan ener gfas moderadamente relativisticas para que los procesos de Fermi sean efectivos; y 2) la reciente evidencia observacional de la ausencia de partfculas termicas en CE. El presente modelo pone en evidencia que ambos problemas estan 1ntimamente relacionados uno con el otro. Jafelice y Opher (1987a) (Astrophys. Space Sci. 137, 303) muestram que es espera da una abundante generaci6n de olas Alf cineticas (OAC) en CE y FRE. En el presente trabajo estudiamos Ia cadena de procesos: a) OAC aceleran electrons termicos al largo del campo magnetico de fondo producien- do electrones supratermicos fugitivos; b) que generan olas Langmuir; y c) las cuales por su vez aceleran una fraccion de los electrones fugi- tivos hasta energias moderadamente relativfsticas. Mostramos que supo - niendo que no haya otra fuente de poblaci6n termica a no ser la , la secuencia de procesos arriba puede encargarse delconsumo de los elec- trones termicos en una escala de tiempo %< que el tiempo de vida de la fuente. ABSTRACT: Extragalactic Jets (EJ) and Extended Radio Sources (ERS) are sites of rich and complex magnetized plasma processes.Recent observa - tions indicate that these sources are filamentary structured. We concentrate here on the analysis of two problems:i) the injection problem, faced by theories of particle acceleration in EJ and ERS plasmas, which need particles with already moderately relativistic energies for the Fer mi processes `to be effective; and 2) the recent observational evidence of the abscence of thermal particles within EJ. The present model makes

  11. Estudo espectral em raios-X duros de fontes do tipo Z com o HEXTE/RXTE

    NASA Astrophysics Data System (ADS)

    D'Amico, F.; Heindl, W. A.; Rothschild, R. E.

    2003-08-01

    Apresentam-se os resultados de um estudo espectral em raios-X de fontes do tipo Z. As fontes do tipo Z são binárias de raios-X de baixa massa (BXBM) com campo magnético intermediário (B~109G). Esta classe de fontes é composta por apenas 6 fontes Galácticas (a saber: ScoX-1, 9, 7, CygX-2, 5 e 0). A nossa análise se concentra na faixa de raios-X duros (E ~ 20keV), até cerca de 200keV, faixa ótima de operação do telescópio "High Energy X-ray Timing Experiment" (HEXTE), um dos três telescópios de raios-X à bordo do Rossi X-ray Timing Explorer (RXTE). Nossa motivação para tal estudo, uma busca de caudas em raios-X duros em fontes do tipo Z, foi o pouco conhecimento sobre a emissão nesta faixa de energia das referidas fontes quando comparadas, por exemplo, as fontes do tipo atoll (também BXBM). Apresentam-se a análise/redução de dados e explicita-se a maneira como o HEXTE mede o ru1do de fundo. Especial atenção é direcionada a este item devido a localização das fontes do tipo Z e também ao problema de contaminação por fontes próximas. Com exceção de ScoX-1, nenhuma cauda em raios-X duros foi encontrada para as outras fontes, a despeito de resultados de detecção dessas caudas em algumas fontes pelo satélite BeppoSAX. As interpretações deste resultado serão apresentadas. Do ponto de vista deste estudo, nós deduzimos que a produção de caudas de raios-X duros em fontes do tipo Z é um processo disparado quando, pelo menos, uma condição é satisfeita: o brilho da componente térmica do espectro precisa estar acima de um certo valor limiar de ~4´1036ergs-1.

  12. Espectroscopia infravermelha de núcleos ativos de galáxias: resultados adicionais

    NASA Astrophysics Data System (ADS)

    Rodríguez Ardila, A.; Viegas, S.; Pastoria, M. G.

    2003-08-01

    Apresentamos resultados parciais de um levantamento espectroscópico na região do infravermelho próximo (NIR) realizado em 30 núcleos ativos de galáxias (AGN), incluindo vários objetos selecionados do catálogo PG com z de até 0.55. O objetivo é estudar a natureza do contínuo observado e as condições físicas do gas emissor. Todas as fontes de tipo 1 apresentam uma mudança na inclinação do contínuo na região de 1.2mm, associada ao término da contribuição do contínuo emitido pelo AGN e ao início da contribuição do contínuo emitido pela poeira quente atribuída ao tórus que rodeia a fonte central. O índice espectral associado à segunda contribuição varia apreciavelmente de objeto para objeto. Este resultado é comparado com distribuições espectrais de energia preditas por modelos de toroides para testar a validez do modelo unificado. A partir das linhas de FeII observado nos espectros deriva-se, pela primeira vez nessa região espectral, um template empírico de FeII para estudar a intensidade e a origem dessa emissão. A intensidade do FeII é estudada em conjunto com aquela da região visível e comparada às predições de modelos teóricos que incluem fluorescência de Lya, excitação colisional e auto-fluorescência como mecanismos dominantes de exitação. Encontra-se que os dois primeiros processos dominam na formação do espectro de FeII observado. Indicadores de avermelhamento, entre eles Brg/Pab, Pab/Pag, Pab/Pad e [FeII] 1.257/1.644 mm são utilizados para mapear a distribuição de poeira nas regiões emissoras de linhas. Encontra-se valores de extinção Av~3 associados ao último indicador e valores significativamente menores (Av~1.5) para os restantes, o que sugere que o [FeII] se forma em uma região separada da maior parte do gás emissor de linhas estreitas.

  13. Airfoil family design for large offshore wind turbine blades

    NASA Astrophysics Data System (ADS)

    Méndez, B.; Munduate, X.; San Miguel, U.

    2014-06-01

    Wind turbine blades size has scaled-up during last years due to wind turbine platform increase especially for offshore applications. The EOLIA project 2007-2010 (Spanish Goverment funded project) was focused on the design of large offshore wind turbines for deep waters. The project was managed by ACCIONA Energia and the wind turbine technology was designed by ACCIONA Windpower. The project included the design of a wind turbine airfoil family especially conceived for large offshore wind turbine blades, in the order of 5MW machine. Large offshore wind turbines suffer high extreme loads due to their size, in addition the lack of noise restrictions allow higher tip speeds. Consequently, the airfoils presented in this work are designed for high Reynolds numbers with the main goal of reducing blade loads and mantainig power production. The new airfoil family was designed in collaboration with CENER (Spanish National Renewable Energy Centre). The airfoil family was designed using a evolutionary algorithm based optimization tool with different objectives, both aerodynamic and structural, coupled with an airfoil geometry generation tool. Force coefficients of the designed airfoil were obtained using the panel code XFOIL in which the boundary layer/inviscid flow coupling is ineracted via surface transpiration model. The desing methodology includes a novel technique to define the objective functions based on normalizing the functions using weight parameters created from data of airfoils used as reference. Four airfoils have been designed, here three of them will be presented, with relative thickness of 18%, 21%, 25%, which have been verified with the in-house CFD code, Wind Multi Block WMB, and later validated with wind tunnel experiments. Some of the objectives for the designed airfoils concern the aerodynamic behavior (high efficiency and lift, high tangential coefficient, insensitivity to rough conditions, etc.), others concern the geometry (good for structural design

  14. Estudo de soluções locais e cosmológicas em teorias do tipo tensor-escalar

    NASA Astrophysics Data System (ADS)

    Silva E Costa, S.

    2003-08-01

    Teorias do tipo tensor-escalar são a mais simples extensão possí vel da Relatividade Geral. Nessas teorias, cujo modelo padrão é a teoria de Brans-Dicke, a curvatura do espaço-tempo, descrita por componentes tensoriais, aparece acoplada a um campo escalar que, de certo modo, representa uma variação na constante de acoplamento da gravitação. Tais teorias apresentam soluções locais e cosmológicas que, em determinados limites, recaem nas apresentadas pela Relatividade Geral, mas que em outros limites trazem novidades, tais como conseqüências observacionais da evolução de flutuações primordiais distintas daquelas previstas pela Relatividade Geral (ver, por ex., Nagata et al., PRD 66, p. 103510 (2002)). Graças a esta possibilidade de trazer à luz novidades em relação à gravitação, teorias do tipo tensor-escalar podem ser vistas como um interessante campo alternativo de pesquisas para soluções dos problemas de massa faltante (ou escura) e/ou energia escura. Seguindo tal linha, este trabalho, ainda em sua fase inicial, apresenta soluções gerais de teorias do tipo tensor-escalar para diversas situações, verificando-se em que consiste a divergência dessas soluções dos casos tradicionais possí veis na Relatividade Geral. Como exemplos das soluções aqui apresentadas pode-se destacar uma expressão geral para diferentes soluções cosmológicas englobando diferentes tipos de matéria (representados por diferentes equações de estado), e a expressão para uma solução local representando um buraco negro com rotação, similar à solução de Kerr da Relatividade Geral. Por fim, é importante ressaltar que, embora aqui apresentem-se poucos resultados novos, na literatura sobre o assunto a maior parte das soluções apresentadas limita-se a uns poucos casos especí ficos, tal como soluções cosmológicas apenas com curvatura nula, e que mesmo as soluções disponí veis são, em geral, pouco divulgadas e, portanto, pouco conhecidas, e

  15. BSSDATA - um programa otimizado para filtragem de dados em radioastronomia solar

    NASA Astrophysics Data System (ADS)

    Martinon, A. R. F.; Sawant, H. S.; Fernandes, F. C. R.; Stephany, S.; Preto, A. J.; Dobrowolski, K. M.

    2003-08-01

    A partir de 1998, entrou em operação regular no INPE, em São José dos Campos, o Brazilian Solar Spectroscope (BSS). O BSS é dedicado às observações de explosões solares decimétricas com alta resolução temporal e espectral, com a principal finalidade de investigar fenômenos associados com a liberação de energia dos "flares" solares. Entre os anos de 1999 e 2002, foram catalogadas, aproximadamente 340 explosões solares classificadas em 8 tipos distintos, de acordo com suas características morfológicas. Na análise detalhada de cada tipo, ou grupo, de explosões solares deve-se considerar a variação do fluxo do sol calmo ("background"), em função da freqüência e a variação temporal, além da complexidade das explosões e estruturas finas registradas superpostas ao fundo variável. Com o intuito de realizar tal análise foi desenvolvido o programa BSSData. Este programa, desenvolvido em linguagem C++, é constituído de várias ferramentas que auxiliam no tratamento e análise dos dados registrados pelo BSS. Neste trabalho iremos abordar as ferramentas referentes à filtragem do ruído de fundo. As rotinas do BSSData para filtragem de ruído foram testadas nos diversos grupos de explosões solares ("dots", "fibra", "lace", "patch", "spikes", "tipo III" e "zebra") alcançando um bom resultado na diminuição do ruído de fundo e obtendo, em conseqüência, dados onde o sinal torna-se mais homogêneo ressaltando as áreas onde existem explosões solares e tornando mais precisas as determinações dos parâmetros observacionais de cada explosão. Estes resultados serão apresentados e discutidos.

  16. POSEIDON: An integrated system for analysis and forecast of hydrological, meteorological and surface marine fields in the Mediterranean area

    NASA Astrophysics Data System (ADS)

    Speranza, A.; Accadia, C.; Casaioli, M.; Mariani, S.; Monacelli, G.; Inghilesi, R.; Tartaglione, N.; Ruti, P. M.; Carillo, A.; Bargagli, A.; Pisacane, G.; Valentinotti, F.; Lavagnini, A.

    2004-07-01

    technologies, Energy and Environment (Ente per le Nuove tecnologie, l'Energia e l'Ambiente, ENEA) and the Italian Agency for Environmental Protection and Technical Services (Agenzia per la Protezione dell'Ambiente e per i Servizi Tecnici, APAT), has become operational in 2000 and we are presently in the condition of drawing some preliminary conclusions about its performance. In the paper we describe the scientific concepts that were at the basis of the original planning, the structure of the system, its operational cycle and some preliminary scientific and technical evaluations after two years of experimentation.

  17. MARKET ASSESSMENT AND TECHNICAL FEASIBILITY STUDY OF PRESSURIZED FLUIDIZED BED COMBUSTION ASH USE

    SciTech Connect

    A.E. Bland; T.H. Brown

    1997-04-01

    Western Research Institute, in conjunction with the Electric Power Research Institute, Foster Wheeler International, Inc. and the US Department of Energy, has undertaken a research and demonstration program designed to examine the market potential and the technical feasibility of ash use options for PFBC ashes. Ashes from the Foster Wheeler Energia Oy pilot-scale circulating PFBC tests in Karhula, Finland, combusting (1) low-sulfur subbituminous and (2) high-sulfur bituminous coal, and ash from the AEP's high-sulfur bituminous coal-fired bubbling PFBC in Brilliant, Ohio, were evaluated in laboratory and pilot-scale ash use testing at WR1. The technical feasibility study examined the use of PFBC ash in construction-related applications, including its use as a cementing material in concrete and use in cement manufacturing, fill and embankment materials, soil stabilization agent, and use in synthetic aggregate production. Testing was also conducted to determine the technical feasibility of PFBC ash as a soil amendment for acidic and sodic problem soils and spoils encountered in agricultural and reclamation applications. The results of the technical feasibility testing indicated the following conclusions. PFBC ash does not meet the chemical requirements as a pozzolan for cement replacement. However, it does appear that potential may exist for its use in cement production as a pozzolan and/or as a set retardant. PFBC ash shows relatively high strength development, low expansion, and low permeability properties that make its use in fills and embankments promising. Testing has also indicated that PFBC ash, when mixed with low amounts of lime, develops high strengths, suitable for soil stabilization applications and synthetic aggregate production. Synthetic aggregate produced from PFBC ash is capable of meeting ASTM/AASHTO specifications for many construction applications. The residual calcium carbonate and calcium sulfate in the PFE3C ash has been shown to be of value in

  18. Expose and Biopan - Technical and operational aspects in the development of exposure platforms for exobiology and radiation biology research

    NASA Astrophysics Data System (ADS)

    Baglioni, P.; Demets, R.; Brillouet, C.; von Heise-Rotenburg, R.; Schulte, W.

    The European Space Agency has been supporting the research on the effects of the space environment on biological and biochemical samples since the early 90's, when the ERA payload was flown for 11 months on the EURECA facility. Following that successful experience, two more exposure platforms have been developed to allow the scientific community to build up a solid research programme in this field. BIOPAN, designed for the outer structure of the Russian retrievable capsule Foton, is conceived for short duration experiments (2 weeks). Provided with its own heat shield, a hinged motor driven lid and with a package of scientific sensors, it has been flown already five times, experiencing the only mishap in 2002 with the Foton-M1 launch accident. It has a very good record of completed experiments and a valuable amount of data has been collected so far. Two more flights are currently planned in 2005 and 2006 with Foton-M2 and -M3. EXPOSE, designed for the outer platforms of the International Space Station (ISS), has been conceived instead to support long duration experiments (1 to 3 years). EXPOSE has passed its qualification test programme and has been accepted for flight as part of the EUTEF Assembly on one of the external platform of the European Columbus Module. Since its launch date has been significantly delayed because of the Shuttle Programme re-planning, ESA is currently evaluating the feasibility of a precursor mission outside the Russian Segment of the ISS. The EXPOSE engineering model would be upgraded and adapted to the URM-D platform, an external ISS facility developed by RKK-Energia. This option would allow to fly the first batch of ESA selected experiments at an earlier stage, leaving the second flight on Columbus open to the follow-on research or to a new set of experiments. The first EXPOSE flight will host 9 experiments prepared by scientists from various European Institutes; the samples will be placed in hundreds of tiny cells, pressurized or vented

  19. Bacterial DNA of Ocean and Land on the Surface of the International Space Station.

    NASA Astrophysics Data System (ADS)

    Grebennikova, Tatiana

    A.V. Syroeshkin2, T.V. Grebennikova1, E.V. Shubralova3, V.A. Shuvalov3, O.S. Tsygankov4, V.B. Lapshin2 1D. I. Ivanovsky Virology Institute, Moscow, Russia 2 Academician E. K. Fedorov Institute of Applied Geophysics, Moscow, Russia 3S.P. Korolev Rocket and Space Corporation «Energia» Korolev, Russia 4Central Research Institute of Machine Building, Korolev, Russia Existence of biological molecules as markers of microorganisms in the space environment has always attracted attention of researchers. There is great attention to the search for extraterrestrial life forms [Nicholson W.L. 2009, Kawaguchi Y. et al 2013], and as well as the coping mechanisms of living organisms in the interplanetary space [Hotchin J. et al 1965, Baranov V.M. 2009, Horneck G. et al 2010]. Experiments on American and Japanese segments of the International Space Station (ISS) over the different nature of resistance during prolonged stay in space were conducted [Scalzi G et al 2012, Wassmann M. et al 2012]. As a result of these experiments confirmed the possibility of preserving the viability of organisms in an open space for a long time. Consequence, became interested in the transfer of living matter from the stratosphere to near-Earth space [Smith D.J. 2013]. We hypothesized that viable forms, or at least, intact DNA can be transferred to the orbit of the ISS with the ascending branch of the global electric circuit. Samples of cosmic dust collected from the surface of the window of the ISS during the exit of an astronaut in space. Samples (washes with material of tampons and tampons) which were in vacuo, were analyzed for the presence of bacterial DNA by nested PCR using primers specific DNA genus Mycobacterium, the DNA of the strain of the genus Bacillus anthracis and DNA encoding the bacterial 16S ribosomal RNA after transportation of the samples to Earth. The results of amplification, followed by sequencing and phylogenetic analysis showed the presence in samples of cosmic dust DNA

  20. Comparison of independent integrated water vapour estimates from GPS and sun photometer measurements and a meteorological model

    NASA Astrophysics Data System (ADS)

    Pugnaghi, S.; Boccolari, M.; Fazlagić, S.; Pacione, R.; Santangelo, R.; Vedel, H.; Vespe, F.

    Measurements using the Global Positioning System (GPS) are affected by the so-called tropospheric delay. Of this, the so-called wet delay is related mainly to the amount of water vapour along the path of the GPS signal through the troposphere. Precise knowledge of the abundance of water vapour, in space and time, is important for meteorology, both in forecasting and now-casting as well as in climate studies. Both because water vapour is the predecessor of precipitation, which is a forecast product, and because a very significant fraction of the energy released to the atmosphere comes from latent heat via water vapour. Despite the high variability of water vapour compared to other meteorological fields, like pressure and wind, water vapour observations are scarce; wherefore additional measurements of water vapour are expected to benefit meteorology. Water vapour is crucial for the development of the small scale, but sometimes very severe,precipitation events which are often seen at mid latitudes, and which are very hard to predict. In this work a comparison between radiometric (sun photometer) and GPS integrated water vapour (IWV) is presented. A sun photometer has been installed at the ENEA (Ente per le Nuove tecnologie, l'Energia e l'Ambiente) base of Lampedusa Island. The sun photometer is quite close (less then 4 km) to an ASI (Agenzia Spaziale Italiana) GPS permanent receiver. In Venezia an ASI GPS permanent receiver is collocated with another sun photometer. Both sun photometers are installed as part of the AERONET (AErosol and RObotic NETwork) program. A long record of sun photometric measurements, GPS data, and meteorological data is available for the Venezia site. A shorter record (summer period of the year 2000) is available for the station at Lampedusa. The comparison among the three different methods for water vapour delay estimation is presented. We find that the GPS and sun photometric data are better correlated (S.D. about 10 mm for the wet delay