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Las Vegas  

NASA Technical Reports Server (NTRS)

This image of Las Vegas, NV was acquired on August, 2000 and covers an area 42 km (25 miles) wide and 30 km (18 miles) long. The image displays three bands of the reflected visible and infrared wavelength region, with a spatial resolution of 15 m. McCarran International Airport to the south and Nellis Air Force Base to the NE are the two major airports visible. Golf courses appear as bright red areas of worms. The first settlement in Las Vegas (which is Spanish for The Meadows) was recorded back in the early 1850s when the Mormon church, headed by Brigham Young, sent a mission of 30 men to construct a fort and teach agriculture to the Indians. Las Vegas became a city in 1905 when the railroad announced this city was to be a major division point. Prior to legalized gambling in 1931, Las Vegas was developing as an agricultural area. Las Vegas' fame as a resort area became prominent after World War II. The image is located at 36.1 degrees north latitude and 115.1 degrees west longitude.

The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.



Estudiar las redes sociales: Aportes y perspectivas para las  

E-print Network

Estudiar las redes sociales: Aportes y perspectivas para las ciencias sociales Claire Bidart LEST estructuracio- nes, sus dinámicas. Transversales a los grupos y a las estructuras sociales glo- bales, las redes. Transversales a los grupos y a las estructuras sociales globales, las redes sin embargo repercuten en ellos

Paris-Sud XI, Université de



E-print Network

RETOS DE LAS HUMANIDADES Y LAS CIENCIAS SOCIALES Consejo Técnico de Humanidades 12,13 y 14 de junio de 2012 12 10:00 horas Políticas de estado en las Humanidades y las ciencias sociales Guillermo las Humanidades y las ciencias sociales: tensiones y ProPuestas María de Ibarrola, CINVESTAV, IPN

Islas, León


Las Vegas Strip History  

NSDL National Science Digital Library

Created by amateur cultural historian Deanna DeMatteo, this site offers "the most detailed history of the Las Vegas Strip on the Internet today," showing in words and graphics the evolution of the properties on the Strip from its beginning to the present. Drawing on materials provided by publications, professional Las Vegas historians, and the Nevada State Museum and Historical Society, DeMatteo offers a detailed, noncommercial history with plenty of photographs (many archival) of the strip from the first night club in 1930 named Pair O Dice to the first true casino hotel, El Rancho with 63 rooms in 1941, to Hilton's giant Paris Las Vegas opening earlier this Fall with 2,914 rooms. There is also a special topics section, covering people significant in the strip's development, such as Warren "Doc" Bayley and Howard Hughes. Launched in August, the Website is continually updated with new material. Note: to reach table of contents, click on the photograph at end of the homepage.

Dematteo, Deanna.


El anlisis de las interacciones grupales: las aplicaciones SOCIOS  

Microsoft Academic Search

El concepto de interaccin representa uno de los ncleos fundamentales de la Psicologa Social. En los grupos y las organizaciones, esto significa focalizar las explicaciones de los fenmenos en el sistema de relaciones de influenciarecproca que se establece entre sus componentes. El anlisis de las matrices de interaccin requiere la utilizacin de algoritmos especficos de tratamiento de la informacin, no

Jos Manuel Cornejo lvarez



History: Las Vegas  

NSDL National Science Digital Library

Las Vegas (or "The Meadows" in Spanish) is a curious place, and it is not much of a stretch to say that it was transformed from a sleepy railroad town into a ring-a-ding swinging town in just a few decades during the 20th century. The Las Vegas Sun has gone above and beyond the call of duty by crafting a site that presents a multimedia-rich experience that narrates the history of this rather unique American city. Visitors should start their journey here by watching one or all eleven parts of their "Boomtown" video on the history of the town. Then visitors may want to take a look at the interactive map of the "Strip", which tells the fortunes of casinos and other buildings, past, present, and future, which have graced this notable region of mega-structures amidst the desert. After that, visitors should look at the "12 Voices from the Past" area. Voices like casino owner Benny Binion and former Nevada governor Mike O'Callaghan are featured here, and it's a great trip back through the city's varied past.


The Las Campanas Redshift Survey  

Microsoft Academic Search

The Las Campanas Redshift Survey has sampled 26400 galaxies, with an average redshift z = 0.1, in six 1.5 deg 80 deg slices in the North and South galactic caps. The combination of the survey's large sample size, volume, and depth argues that the Las Campanas Survey may currently represent the best chance for a fair sample of the

Huan Lin; Stephen D. Landy; Augustus Oemler; Douglas L. Tucker; Robert P. Kirshner; Paul L. Schechter




EPA Science Inventory

ENPACT: The Las Vegas Interagency Pilot Project The Las Vegas Interagency Pilot Project of the EMPACT program has involved eleven efforts. These efforts are described in brief on the poster presentation. They include: Las Vegas Environmental Monitoring Inventory, the Qual...


Las Cruces MPO 2040 Metropolitan Transportation Plan  

E-print Network

?A ANA COUNTY June 9, 2010 LAS CRUCES METROPOLITAN PLANNING ORGANIZATION Policy Committee Sharon Thomas, Chair - City of Las Cruces Scott Krahling, Vice Chair - Do?a Ana County Mayor Nora Barraza - Town of Mesilla Olga Pedroza - City of Las... Cruces Leticia Benavidez - Do?a Ana County Sam Bernal - Town of Mesilla Gill Sorg - City of Las Cruces Karen Perez - Do?a Ana County Linda Flores - Town of Mesilla Staff Tom Murphy, AICP, MPO Officer Andrew Hume, Planner Caeri Thomas...

Las Cruces Metropolitan Planning Organization



todasuvida: Las personas con diabetes son ms  

E-print Network

diabetes Controlesu todasuvida: Las personas con diabetes son más propensas a padecer de enfermedades del corazón que quienes no tienen diabetes. Boletín 631 D Las personas con diabetes tienen mayor- res relacionados con la diabetes, como derrame cerebral, mala circulación en las piernas y pies e


Premio Casa de las Amricas 1995  

E-print Network

. 3) El cuento Fbulas, de Nelson de Oliveira, Brasil. 4) El Premio de Novela fue declarado desierto. Premio Extraordinario de literatura hispana en los Estados Unidos La Casa de las Amricas aprovecha esta ocasin para anunciar que en 1997 ha... Unidos, con textos escritos en espaol, ingls o ambas lenguas y en los gneros de narrativa y poesa. Los libros que concursen se sometern a las Bases generales del Premio y podrn ser enviados a: Casa de las Amricas, 3ra. y G, El Vedado, La Habana...




Las tecnologas de la informacin en las pequeas y medianas empresas mexicanas  

Microsoft Academic Search

La presente investigacin plantea una reflexin sobre el uso de las Tecnologas de la Informacin y Comunicacin (TIC)[1] en las Pequeas y Medianas empresas mexicanas (Pymes), en trminos de los cambios en los procesos de produccin y organizacin, en el entorno institucional pblico-privado y las ventajas de esto en la creacin de capital social. \\u000a\\u000aDiscutimos en este trabajo, la escasa

Mnica Casalet; Leonel Gonzlez



Trnsitos de las Ciencias Sociales a las Ciencias de la Comunicacin  

Microsoft Academic Search

En el presente trabajo se presenta una travesa que va desde el planteamiento de un mapa para reflexionar sobre las Ciencias Sociales y su papel en el mundo contemporneo hasta llevarnos a un territorio particular que es el de las Ciencias de la Comunicacin, un campo \\

J. Hugo T. Cornejo Martn del Campo



Wilson Botanical Garden Las Cruces Biological Station  

E-print Network

Wilson Botanical Garden Las Cruces Biological Station Apdo. 73-8257 San Vito, Coto Brus, COSTA RICA you can do to help at the Wilson Botanical Garden, please email us at Tree Tour finally finished the Wilson Botanical Garden Tree Tour booklet in both Spanish and English. The self

Sekercioglu, Cagan Hakki


LAS Language Arts Supplement, English. Revised Edition.  

ERIC Educational Resources Information Center

This collection of over 100 games and activities is intended to increase oral proficiency among Spanish-speaking children without requiring reading skills. The collection grew out of the desire to provide remedies for specific linguistic weaknesses in English as identified by the Language Assessment Scales (LAS). Because tongue twisters, riddles

DeAvila, Edward A.; Duncan, Sharon E.


Alcoholism and Drug Abuse in Las Juntas  

Microsoft Academic Search

Background: Originally, while in Costa Rica I wanted to investigate alcoholism and drug addiction within the Las Juntas community. Specifically, I wanted to look at addiction as it pertains to the mining community in comparison with the rest of the public. I hypothesized that there may be cultural influences from the mining community, that may correlate with alcoholism and drug

Suzanne Wasserman


Las dificultades de sentir: el rol de las emociones en la estigmatizacin del VIH/SIDA  

PubMed Central

Resumen El Virus de Inmunodeficiencia Humana (VIH) y el Sndrome de Inmunodeficiencia Adquirida (SIDA) han sido motivo de estigmatizacin para las personas que viven con ellos. Esta estigmatizacin se ha estudiado consecuentemente desde la perspectiva de opiniones de agentes estigmatizantes. Estas opiniones han obviado sistemticamente el rol de las emociones en el proceso de estigmatizacin. Llevamos a cabo este estudio con el propsito de identificar el rol de las emociones en el proceso de estigmatizacin de las personas que viven con el virus (PVVS) por parte de profesionales de la salud. Para lograr este objetivo utilizamos un diseo exploratorio y cualitativo en el cual utilizamos la tcnica de entrevistas semiestructuradas a profundidad. La muestra estuvo compuesta por 80 profesionales de la salud y estudiantes de las siguientes especialidades: psicologa, trabajo social, medicina y enfermera. Los resultados reflejaron la existencia de emociones asociadas al VIH/SIDA tales como pena, lstima, compasin, asco, fobia y miedo entre los/as profesionales y estudiantes que participaron. Las personas participantes evidenciaron la necesidad de controlar sus emociones al interactuar con PVVS. Los resultados apuntan a la necesidad de explorar aquellos factores que mediatizan las emociones, tales como el contexto social en que se manifiestan y ante quines se revelan, para lograr entender a cabalidad el estigma que rodea al VIH/SIDA. PMID:20212916




Stratigraphic Units in Las Vegas Valley, Nevada  

NASA Astrophysics Data System (ADS)

Using 25 well logs, 15 of which also had accompanying geophysical and aquifer test data were used to describe and establish three alloformations including the Tule Spring and Paradise Valley Alloformations and four aquiformations, the most well defined being, the Las Vegas Springs Aquiformation, in the west central part of the bolson (Donovan, 1996), primarily in Township 20 South, Range 60 East, Mount Diablo Baseline and Meridian (MDBLM), with the stratotypes designated in T20S, R61E S31 MDBLM (36 9'59.89"N 11511'26.34"W). The allostratigraphic units were developed using the recommendations in the North American Code of Stratigraphic Nomenclature (NACSN, 1983 and 2005). The hydrostratigraphic units were developed following the recommendations of Seaber (1992). The units constitute the bulk of the upper 500 meter section. Twenty additional wells in the same geographic area, drilled and completed between 1995 and 2005 with detailed geologic and hydrologic information provided confirmation of these units. The proposed stratigraphic units are not part of either, and are located between, the two previously named and non-contiguous formations in the bolson (the Miocene Muddy Creek Formation and the late Pleistocene Las Vegas Formation) (Longwell et al 1965). Las Vegas Valley contains a metropolitan area of approximately two million people. The deeper part of the alluvial basin below 300 ft below ground surface is of interest for supply and storage. The shallower part is of interest for water quality and the interaction between the ground water system and engineered structures.

Donovan, D.



Las opciones reales en la evaluacin de inversiones bajo incertidumbre  

Microsoft Academic Search

Las aportaciones mas actuales en el campo de las finanzas continan apuntando a la maximizacin del valor de la empresa, pero en este orden se imponen preguntas como, se crea valor con la inversin?, es o no una decisin correcta desde el punto de vista econmico y financiero?. La teora de opciones constituye una de las bases ms importantes de

A. Lauchy Saudo; H. Domnguez Reyes



Las redes neuronales como herramientas estadsticas no paramtricas de clasificacin  

Microsoft Academic Search

Recientemente diversos trabajos (ver p.e. Cherkassky, Friedman y Wechsler, 1994; Ripley, 1996) han analizado las relaciones entre redes neurales y tcnicas estadsticas con vencionales. Aunque los resul - tados no son concluyentes, en general las redes neurales han mostrado una capacidad clasificatoria igual o superior que las tcnicas estadsticas, con la ventaja de poderse utilizar independientemente del cumplimiento de los

Alfonso Pitarque; Juan Carlos Ruiz; Juan Francisco Roy



La libertad en Las manos de Dios.  

E-print Network

and evil have very specific meanings: freedom and oppression."4 La figura del prisionero o del Crucificado es una representacin del Hombre, atrapado en su sentido de culpa original y restringido o sacrificado por el prjimo. Como dice el Diablo en Las... carcter rebelde. Sus peticiones al carcelero se vuelven un desafo cuando pregunta, "Tiene miedo el Amo de que algn da esos pobres hombres que l ha vuelto mudos le griten a la cara lo mismo que mi hermano le dijo?" (p. 313). Corresponde al Diablo...

Schoenbach, Peter J.



?Cuales son las amenazas o peligros volcanicos?  

USGS Publications Warehouse

Los volcanes son capaces de producir numerosos peligros geologicos e hidrologicos. Los cientificos del Servicio Geologico de los EE. UU. (USGS, por sus siglas en ingles) y de otras instituciones alrededor del mundo estan estudiando los peligros de muchos de los centenares de volcanes activos y potencialmente activos del mundo. Estos cientificos vigilan muy de cerca la actividad de algunos de los volcanes mas peligrosos, por lo que estan preparados para alertar a las autoridades y/o a la poblacion en caso de que aumente sustancialmente la probabilidad de que ocurra una erupcion u otro evento peligroso.

Myers, Bobbie; Brantley, Steven R.; Stauffer, Peter; Hendley, James W., II




Microsoft Academic Search

Resumen. Este trabajo centra su atencin en la importancia que poseen las ilustraciones que utilizan los libros de texto de ciencias para la comprensin de su contenido. Para ello se parte de una fundamentacin terica en cuanto a los requisitos que deberan cumplir aqullas para favorecer su adecuado procesamiento, as como la diferente morfologa que suelen presentar en los libros




Fundamentos de la argumentacin jurdica. Revisin de las teoras sobre la justificacin de las decisiones judiciales  

Microsoft Academic Search

El libro de la distinguida catedrtica de la Universidad de msterdam, publicado en ingls por Kluwer Academia Publishers, tiene una interesante estructura que permitir utilizarlo tanto para consulta de jueces, abogados y ciudadanos deseosos de aproximarse a la problemtica de nuestra profesin, como por los estudiantes de las Facultades de Derecho. Luego de una introduccin, la autora muestra el tema

Eveline T. Feteris


Las Cumbres Observatory Global Telescope Network  

NSDL National Science Digital Library

Las Cumbres Observatory Global Telescope Network (LCOGTN) features a comprehensive science research program and an innovative astronomy-education program featuring state-of-the-art instructional materials appropriate for students at all levels, from elementary school through postsecondary. LCOGTN operates two research-class robotic telescopes, the Faulkes Telescope North, located in Maui, Hawaii, and the Faulkes Telescope South, located in Australia at Siding Spring Observatory. These telescopes are available to teachers to use as part of their curricular or extracurricular activities, and are supported by a range of educational materials and a team of educators and professional astronomers. Additional telescopes in Mississippi, Texas, California, and the United Kingdom will further broaden the Network's scope. Real-time observation and still images available.

Observatory, Las C.



Las ayudas de la Unin Europea a las regiones espaolas en el perodo 1989-1993 : fichas descriptivas y apoyos financieros  

Microsoft Academic Search

Se ofrece una descripcin de las ayudas europeas a las regiones espaolas en el periodo 1989-1993, prestando especial atencin a las canalizadas a travs de los fondos estructurales y de las principales iniciativas comunitarias de carcter estructural. La descripcin guarda un mismo esquema para cada Comunidad Autnoma y resume los datos ofrecidos en la publicacin 'Las regiones espaolas en la

Jos Antonio Nieto Sols; Alfonso Utrilla de la Hoz



Tecnologas de la Informacin y de las Comunicaciones (TIC)  

E-print Network

1 Tecnologías de la Información y de las Comunicaciones (TIC) Plan Sectorial 2008-2012 #12;2 1 Tecnologías de la Información y de las Comunicaciones (TIC) Planificación Estratégica de la Universidad de y transparencia. Se promoverá especialmente: Comportamiento ético en el uso de las TIC. Actitud

Escolano, Francisco



E-print Network

155ENSE?ANZA DE LAS CIENCIAS, 2000, 18 (2), 155-169 MÁS ALLÁ DE LAS IDEAS PREVIAS COMO DIFICULTADES METACOGNITIVAS DE LOS ALUMNOS DE CIENCIAS CAMPANARIO, JUAN MIGUEL1 y OTERO, JOS? C. 1 E-mail: 2 E-mail: Grupo de Investigación en Aprendizaje de las Ciencias. Departamento de

Campanario, Juan Miguel


University of Nevada, Las Vegas Faculty Senate Constitution  

E-print Network

of Nevada and the United States. Section 2. Membership All academic faculty and professional staff who holdUniversity of Nevada, Las Vegas Faculty Senate Constitution Revised January 2009 Section 1 of Nevada, Las Vegas; the Nevada System of Higher Education Code; and the laws and the statutes of the State

Hemmers, Oliver


New Mexico State University Las Cruces, New Mexico 88003  

E-print Network

Cole Tobin New Mexico State University Las Cruces, New Mexico 88003 325: May 2015, New Mexico State University, Las Cruces NM GPA: 3.6; GPA in Major (Anthropology): 4.0; GPA and non- human primates. ! Research Appointments ! 2013-Present NMSU-HHMI Research Scholar, New Mexico

Wright, Timothy F.


Evite las enfermedades transmitidas por alimentos al comer en restaurantes  

E-print Network

Evite las enfermedades transmitidas por alimentos al comer en restaurantes Todos los días, americanos consumen alimentos y bocadillos preparados fuera del hogar por otra persona. Comer en un prácticas de higiene? Si manipulan dinero, ¿se lavan las manos antes de tocar los alimentos? Si la respuesta


Efecto desestacionalizador del turismo rural en las regiones espaolas  

Microsoft Academic Search

La estacionalidad turstica es una materia de estudio muy relevante para los responsables de las organizaciones y destinos tursticos. En el presente trabajo pretendemos analizar la estacionalidad en el turismo rural en Espaa y, especialmente, en las Comunidades Autnomas. Trata- mos de comprobar los indicadores estacionales tanto desde el lado de la demanda como de la oferta turstica, utilizando distintas

Jess Manuel Lpez Bonilla; Luis Miguel; Lpez Bonilla



Microsoft Academic Search

Durante las dos ltimas dcadas se aprecia una evolucin importante de los intereses y exigencias de los consumidores de actividades tursticas. Estos intereses se han enfocado sobre todo en destinos geogrficos que poseen patrimonios culturales, gastronoma tradicional, prcticas religiosas y otros atractivos tursticos que responden a las nuevas necesidades y demandas de los turistas durante su tiempo de ocio. Al

Ma. Genoveva Milln Vzquez de la Torre; Emilio Morales-Fernndez; Mara Sol Castro-Freire



Translational genomics of Vegetable Crops Las Vegas, NV  

E-print Network

Translational genomics of Vegetable Crops Las Vegas, NV July 21, 2005 David Francis and Allen Van Deynze At the recent ASHS meetings in Las Vegas, a workshop "Translational Genomics of Vegetable Crops interventions" (Minna and Gazdar, 1996). In applied plant science, "translational genomics" implies

Douches, David S.



Microsoft Academic Search

Actualmente el clima laboral sigue siendo un rea de inters para la gestin del capital humano y psicologa del trabajo, debido principalmente a la naturaleza de las actividades del responsable del personal, que demandan la comprensin de las percepciones de los trabajadores, su relacin con el desempeo en el trabajo, la satisfaccin y el compromiso laboral; as como la creacin

Lpez Chanez Francisco Javier; Casique Guerrero Alicia



Fingerprint Indexing Based on LAS Registration , Chao Zhang1  

E-print Network

Fingerprint Indexing Based on LAS Registration Tong Liu1 , Chao Zhang1 and Pengwei Hao1,2 1 Fingerprint indexing is an efficient technique that greatly improves the performance of fingerprint based method based on fingerprint registration with a novel feature called local axial symmetry (LAS

Hao, Pengwei



E-print Network

351ENSE?ANZA DE LAS CIENCIAS, 2001, 19 (3), INVESTIGACI?N DIDÁCTICA ¿QU? PUEDE HACER UN PROFESOR CONVENCIONALES CAMPANARIO, JUAN MIGUEL Grupo de Investigación en Aprendizaje de las Ciencias Departamento de realizarse utilizando los libros de texto de ciencias habi- tuales. Con estas actividades y tareas se intenta

Campanario, Juan Miguel


Nunca ha sido fcil distinguir los hechos de la informacin falsa sobre los alimentos; las estrategias de mercadeo, las frases  

E-print Network

Nunca ha sido fácil distinguir los hechos de la información falsa sobre los alimentos; las unos mitos comunes y persistentes respecto a los alimentos: Mito: Las frutas y verduras frescas son más alimentos congelados y enlata- dos son tan nutritivos como los frescos. De hecho, ya que el licopeno es

Burke, Peter


El fenotipo de las mucinas en el esfago de Barrett  

PubMed Central

Antecedentes El esfago de Barrett es una reconocida lesin precursora de adenocarcinoma esofgico. Aunque generalmente asociada al reflujo gastroesofgico, los mecanismos patognicos de la enfermedad no son bien conocidos. El objetivo del presente estudio es explorar la historia natural e identificar marcadores de progreso del proceso precanceroso. Material y mtodos Se utilizaron cortes histolgicos de 67 especmenes de esfago correspondientes a 14 pacientes con esfago de Barrett, a los que se sigui entre 1 9 aos. Se clasificaron las lesiones en: esfago de Barrett sin displasia, indefinido para displasia o con displasia. Se evalu la expresin de diferentes mucinas en las clulas caliciformes y en las columnares usando tcnicas de histoqumica e inmunohistoqumica. Resultados En todos los casos se comprob la presencia de metaplasia intestinal incompleta. Las clulas columnares dentro del epitelio metaplsico contenan mucinas neutras. A mayor severidad de la lesin se encontr significativamente menor expresin de sialomucinas en las clulas columnares (p de tendencia igual a 0,03). En sujetos con lesiones indefinidas para displasia se observ un mayor contenido de sulfomucinas en las clulas caliciformes (p=0,034) y de MUC2 en las clulas columnares (p=0,029) que en sujetos con esfago de Barrett sin displasia. Se observ expresin de la mucina intestinal MUC2 y de la mucina gstrica MUC5AC en todas las muestras. MUC6, una mucina de las glndulas profundas gstricas, se present ocasionalmente. Conclusin La evaluacin de los perfiles de mucinas en el esfago de Barrett sugiere una transicin gradual del fenotipo del epitelio metaplsico a medida que la lesin avanza en el tiempo. PMID:21804831

Torrado, Julio; Piazuelo, Mara Blanca; Ruiz, Irune; Izarzugaza, Mara Isabel; Camargo, Mara Constanza; Delgado, Alberto; Abdirad, Afshin; Correa, Pelayo



The Land Analysis System (LAS) for multispectral image processing  

USGS Publications Warehouse

The Land Analysis System (LAS) is an interactive software system available in the public domain for the analysis, display, and management of multispectral and other digital image data. LAS provides over 240 applications functions and utilities, a flexible user interface, complete online and hard-copy documentation, extensive image-data file management, reformatting, conversion utilities, and high-level device independent access to image display hardware. The authors summarize the capabilities of the current release of LAS (version 4.0) and discuss plans for future development. Particular emphasis is given to the issue of system portability and the importance of removing and/or isolating hardware and software dependencies.

Wharton, S. W.; Lu, Y. C.; Quirk, Bruce K.; Oleson, Lyndon R.; Newcomer, J. A.; Irani, Frederick M.



Safety of the Las Vegas left-turn display.  


This paper provides a safety evaluation of a special protected/permitted left turn signal control (Las Vegas LT Display) that has been implemented in the urbanized area of Las Vegas, Nevada. The Las Vegas LT Display eliminates the yellow trap condition for leading approach in lead/lag operation. It provides protected only left turns during certain times of day by suppressing the permitted green ball and yellow ball displays. Before and after studies were conducted using the crash data from 10 intersections. Results from the analyses indicated that no obvious safety concerns due to use of the special display. PMID:24144494

Ozmen, Ozlem; Tian, Zong Z; Gibby, A Reed



Wintertime aerosol in Las Vegas, Nevada  

NASA Astrophysics Data System (ADS)

Numerous studies have found adverse health effects in subjects who live next to major roadways due to air pollution; in particular, there can be severe impacts on lung function and development in children living and/or attending school next to major roadways due to their exposure to air pollutants, including particulate matter (PM) or aerosol. The composition of aerosol at an elementary school next to a major freeway in Las Vegas, Nevada during winter 2008 was measured using a suite of measurements. An Aerodyne High Resolution Aerosol Mass Spectrometer (HR-AMS) was used to quantify the composition of non-refractory PM1 aerosol, including organic matter (OM); an Aethalometer was used to quantify black carbon (BC); a Sunset OCEC analyzer was used to measure organic and elemental carbon (OC, EC); and a particle-into-liquid system (PILS) coupled to two ion chromatographs (IC) was used to measure fine particle ions. Hi-volume PM2.5 samplers were used to collect aerosol on quartz fiber filters at between 2 and 24 hour intervals during the study, a subset of which were analyzed for PAHs and the biomass burning tracer levoglucosan. Data were analyzed by positive matrix factorization (PMF) to determine the amount of fresh, hydrocarbon-like organic aerosol (HOA), more oxidized OA (low-volatility and semi-volatile OA [LV-OOA, SV-OOA]) and biomass burning OA (BBOA). PM1 aerosol was predominantly carbonaceous, with OM plus BC accounting for 74% of the overall average 6.9 mug/m3 of PM measured. BC had a diurnal pattern similar to traffic volume, while OM was higher in the evening compared to the morning. OM was a mixture of fresh HOA, urban- and regional-scale OOA, and BBOA; in the evening, SV-OOA and BBOA peaked, while HOA concentrations were on average the same in the morning and evening, similar to BC. OM/OC ratios were low (1.52 +/-0.14 on average) during the morning rush hour (average OM = 2.4 mug/m3) when vehicular emissions dominate this near-road measurement site, and even lower (1.46 +/- 0.10) in the evening (average OM=6.3 mug/m3), when a combination of vehicular and fresh residential biomass burning emissions was typically present during a period characterized by strong atmospheric stability. While nitrate and sulfate had size distributions typical of secondary species with a sharp peak in particle diameter between 400 nm and 500 nm, OM had a broader distribution between 100 nm and 400 nm diameter particles, reflecting its combination of fresh, smaller particles and aged, larger particles. OM concentrations were on average similar between periods when the sampling site was upwind and downwind of the freeway, though during the morning OM concentrations were higher under downwind conditions, as was the fraction of HOA.

Brown, Steven G.


Agresin Sexual Derechos de las Vctimas y Servicios Disponibles  

E-print Network

Agresión Sexual Derechos de las Víctimas y Servicios Disponibles Las víctimas necesitan soporte y llamando al No. 1-800-226-6667. Víctimas de delitos sexuales tienen varios derechos, muchos de ellos están contenidos en el Capítulo 960, Estatutos de la Florida, incluyendo el derecho de: · Mantener la información

Sura, Philip


Mecanismos de fabulacin y mitificacin de la historia en las 'Comedias impolticas' y las Coronas de Rodolfo Usigli  

E-print Network

desarrolla una teora interpretativa del discurso histrico que le permite sealar, a un nivel estrictamente lingstico, las estrategias narrativas, argumntales e ideolgicas que definen y marcan el estilo espec fico de la imaginacin histrica de un... metonimia, el sincdoque y la irona) como elementos retricos bsicos de prefiguracin, as como las teoras filosficas acerca de la concep- tualizacin de la realidad histrica, La lnea interpretativa de Northrop Frye acerca de los "modos de fabulacin...

Layera, Ramó n



La proyeccin teatral de la masacre de las bananeras  

E-print Network

obra consta de tres escenas divididas por la entrada de un nuevo personaje. Tulia es la nueva maestra que llega al pueblo; Amalia, su hermana paraltica, ser frgil y sensitivo que presiente la tragedia vivida en el pasado, prevee la que ellas... Encarnacin viene a darles la bienvenida y responde a las preguntas de Amalia; le informa que bajo la casa estn enterrados los obreros de las bananeras que no cupieron en los vagones del tren. Tulia se levanta aterrorizada. Empieza a caminar como si lo...

Velasco, Marí a Mercedes



Implicaciones Fiscales y Sectoriales de la Reforma a las Transferencias Territoriales en Colombia  

Microsoft Academic Search

En este documento se analizan las implicaciones fiscales y sectoriales de la reforma a las transferencias territoriales que actualmente se debate en segunda vuelta en el Congreso. La reforma ajusta los montos que el gobierno nacional deber transferir a las regiones y considera marginalmente la discusin sobre su distribucin sectorial y territorial. Las competencias de gasto no se consideran en

Igancio Lozano; Jorge Ramos; Hernn Rincn



Microsoft Academic Search

Resumen La violencia en las parejas jvenes es un precursor de la violencia en las pare- jas adultas. En las parejas jvenes la violencia suele ser psicolgica, plantearse de forma sutil y ser menos grave que en las parejas en la vida adulta. Por lo que se refiere a los agresores, la violencia es ms frecuente cuando hay ciertas variables

Itxaso Gonzlez-Ortega; Enrique Echebura; Paz de Corral



El Informe Anual a la Nacin Muestra que la Incidencia de Cncer y las Tasas de Mortalidad estn Declinado: Las Tasas de Supervivencia Reflejan Progreso Significativo

Las organizaciones ms importantes de la Nacin informan que los riesgos de la poblacin americana a contraer o morir a causa de cncer continan disminuyendo mientras que las tasas de supervivencia para muchos tipos de cncer continan aumentando.


(DOCFRADIS 1201) Estrategia publicitaria del minorista en las redes sociales. Factores que motivan las compras en la web 2.0  

Microsoft Academic Search

El uso de las redes sociales, como estrategia publicitaria del minorista, favorece la comunicacin interactiva de la marca y sus productos y motiva las compras, en la web 2.0, producindose una revolucin en el paradigma estimulo-respuesta del siglo XXI. El trabajo analiza la potencialidad de la interactividad como estrategia de marca en las redes sociales e identifica los factores clave

Ines Kster Boluda; Natalia Vila Lpez; Asuncin Hernndez Fernndez



Las Rocas Nos Cuentan (Rocks Tell Their Stories)  

ERIC Educational Resources Information Center

Many Earth science lessons today still focus on memorizing the names of rocks and minerals. This led the author to develop a lesson that reveals the fascinating stories told by rocks through the study of their physical properties. He first designed the lesson for Puerto Rican teachers, hence its Spanish title: "Las Rocas Nos Cuentan Su Historia."

Llerandi-Roman, Pablo A.



Computando lo aspero Por que se cuelgan las computadoras?  

E-print Network

construir una m´aquina que demuestre teoremas y as´i encuentre todas las verdades matem´aticas. Kurt G¨odel´aquina no puede resolver. #12;Historia de Hilbert y sus amigos David Hilbert: Bueno... yo pens´e que... Kurt G¨odel

Figueira, Santiago


Grato colofn a las ligas internas Mar Jover, mejor  

E-print Network

los dos preciados galardones del Consejo Superior de Deportes. CUADERNILLO DEL DEPORTE EN LA premios estuvo presidida por el Vicerrector de Cultura, Deporte y Política Lingüística, Carles Cortés a s competiciones internas, las del deporte de todos, parece que la valoración general es muy positiva. Presidió la

Escolano, Francisco



E-print Network

LAS NOTICIAS A NEWSLETTER FOR K-12 TEACHERS CENTER FOR LATIN AMERICAN STUDIES UNIVERSITY CENTER a new beginners class in Portuguese? Come join the Center for Latin American Studies in fall 2013 in late September, 2013. Classes will meet at the Center for Latin American Studies on the Pitt Oakland

Machery, Edouard


Solar Hot Water for a Motor Inn -- Las Vegas, Nevada  

NASA Technical Reports Server (NTRS)

Solar hot-water installation at motor inn in Las Vegas, Nevada is described in report containing descriptions of design, philosophy, operation of system and problems and solutions. Provides drawings of solar roof plan, operator's instructions, manufacturers' brochures and copy of acceptance report.



Reading "Las Meninas": An Ekphrastic Approach to Teaching "Don Quijote"  

ERIC Educational Resources Information Center

Reading and teaching "Don Quijote" present multiple challenges to twenty-first century students and instructors who are culturally and historically distanced from the seventeenth century. With "Las Meninas" serving as a visual lexicon for cuing correlative themes and events in "Don Quijote", the instructor, through an ekphrastic, interdisciplinary

Ortuno, Marian



Control del dolor: Apoyo para las personas con cncer

Contiene informacin sobre las medicinas contra el dolor para pacientes con cncer, los planes para controlarlo, cmo hablar con su equipo de atencin mdica sobre el dolor que usted siente y qu hacer para controlar los efectos fsicos y emocionales del mismo.


Seleccin de los principales problemas de seguridad de las vacunas  

Microsoft Academic Search

ExtractoEjemplos recientes de los principales beneficios en salud pblica de la vacunacin incluyen reducciones globales de la mortalidad por sarampin y el registro de niveles bajos de enfermedades evitables por vacunas en Estados Unidos. No obstante, los problemas reales o percibidos de seguridad de las vacunas pueden ejercer un impacto adverso sobre los programas de vacunacin. La monitorizacin slida de

John K. Iskander; Jane Gidudu; Nelson Arboleda; Wan-Ting Huang




E-print Network

, industria lítica, variscita e intercambios. ABSTRACT Recent studies realized on rock salt exploitation, the economic flows have been studied related to the salt circulation and the provisioning of the rock tools, Catalonia, Neolithic, rock salt, mine, blond flint, rock tools, variscite, exchanges. 213 Las herramientas

Paris-Sud XI, Université de


Castelldefels Salut: Las redes sociales y la Atencin Primaria  

Microsoft Academic Search

Las enfermedades crnicas, en buena parte causadas por los estilos de vida, estn y estarn tensionando a los servicios sanitarios. Una estrategia que cada da adquiere ms vigencia son los proyectos de salud comunitarios que puedan incidir, de forma efectiva, para fomentar hbitos de vida ms saludables. En este artculo presentamos nuestra experiencia de trabajo en red de los distintos

Ramon Morera; Tino Mart; Irene Cubells; Mireia Sans; Alba Brugus; Antoni Peris; Eduard Navarro



Las Vegas randomized algorithms in distributed consensus problems  

Microsoft Academic Search

We consider distributed consensus problems from the viewpoint of probabilistic algorithms. In particular, we provide an overview on some specific problems where randomization is critical in achieving consensus among multiple agents. Further, we show that the randomized algorithms which are used in this setting are the so-called Las Vegas randomized algorithms (e.g. [24]). This class is different from that of

Hideaki Ishii; Roberto Tempo



TCD Research Methods Fall 2004 LAS 6292 (Sect. 6816x)  

E-print Network

TCD Research Methods ­ Fall 2004 LAS 6292 (Sect. 6816x) Thursday, Periods 6-8 (12:50- 3:50) 376 and development. Required textbooks, available at Goering's Books and Bagels: 1. Bernard, H.R. 1995. Research Methods in Anthropology: Qualitative and Quantitative Approaches, 3rd edition. AltaMira Press, Walnut

Pilyugin, Sergei S.


College of Arts and Sciences LAS Latin American Studies  

E-print Network

College of Arts and Sciences LAS Latin American Studies KEY: # = new course * = course changed INDEPENDENT WORK IN LATIN AMERICAN STUDIES. (3) Directed study for students wishing to do specialized work on a topic related to the Latin American Studies area. May be repeated to a maximum of six credits. Prereq

MacAdam, Keith


Victoria Varga, `04 Las Matas de Farfan, Dominican Republic  

E-print Network

based on their nutritional health. Many of the children were malnourished, anemic, or parasite ridden of Charity at their Nutritional Center for Children in Las Matas de Farfan was one of the most rewarding, Elaine and I worked with some of the most beautiful children that temporarily resided there. They were


Las zonas mineras espaolas a finales del XIX  

Microsoft Academic Search

PRESENTACIN Jugh James Rose, capelln de las compaas mineras inglesas, francesas y alemanas de Linares, es el autor de la obra Untrodden Spain and her black country being sketches of the life and character of the Spaniard of the interior publicada en dos volmenes en Londres en 1875. De l sabemos que ejerci como capelln del ejrcito en Dover y

Mara Antonia Lpez Burgos



QUARTERLY PROGRESS REPORT University of Nevada, Las Vegas  

E-print Network

measurements and off-road experiments using different vehicles (ATV, motorcycle, dune buggy) were performed, Effects Of Wind Erosion, Off-Road Vehicular Activity, Atmospheric Conditions And The Proximity- road vehicle area close to Las Vegas, NV. A mapping approach to assess dust emission potential

Ahmad, Sajjad


Tree-Killing Las Conchas Fire in New Mexico  

USGS Multimedia Gallery

USGS scientist Craig D. Allen observes the results of the extensive, tree-killing fire that consumed almost all above-ground biomass in this part of the Las Conchas Fire burn area in the Jemez Mountains, New Mexico. Photo taken in late August 2011, two months post-fire. Forest drought stress is high...


The petrology of the Las Canadas volcanoes, Tenerife, Canary islands  

Microsoft Academic Search

Tenerife is the largest of the seven Tertiary to Recent volcanic islands that make up the Canary Archipelago. The island is composed of volcanics belonging to the basanitetrachyte-phonolite assemblage that characterises many Atlantic islands. The most voluminous development of intermediate and salic volcanics has been in the centre of the island where the Las Canadas volcanoes arose upon a basement

William Ian Ridley



Fuentes de Fuentes: Paz y las races de Todos los gatos son pardos.  

E-print Network

, economa y las dems bases de la nacin mexicana. En Posdata, Paz revela el fondo de las palabras de Corts y Moctezuma, y sus implicaciones: Si el hombre es doble y triple, tambin lo son las civilizaciones y las sociedades. Cada pueblo sostiene un... azteca las caras de dioses (y la respuesta es "no" entonces), pero va a ver las caras de hombres que en sus papeles histrico-apocalpticos tomarn el papel de dioses en la destruccin de toda una civilizacin. Y obviamente esta destruccin del imperio...

Brower, Gary



Geophysical Studies of the Las Vegas Urban Corridor  

NSDL National Science Digital Library

The Geophysical Studies of the Las Vegas Urban Corridor Area are part of an integrated effort to "geologically characterize the seismic hazards, water resources, and crustal structure of this rapidly growing urban corridor" by the USGS. The informational Web site contains a gravity map of the Las Vegas region, an aeromagnetic map, and a publications link with a list of over a dozen references. Seven of these publications are freely available for download with titles such as "Aeromagnetic Survey of the Amargosa Desert," "Nevada and California: A Tool for Understanding Near-Surface Geology," and Hydrology and Principal Facts for Gravity Stations in the Vicinity of Coyote Spring Valley, Nevada, with Initial Gravity Modeling Results." An interesting collection of unique resources, the site should be of interest to professionals in a wide variety of fields.


Calidad del aire interior y salud en las viviendas  

E-print Network

Calidad del aire interior y salud en las viviendas temporales de FEMA A los residentes de los que usted pueda tener sobre la calidad del aire y el formaldehído en los tráileres de FEMA. Usted pequeños, como los tráileres de FEMA, los venenos para matar insectos también pueden irritar l a nariz o la


Las ciudades de Andaluca ante la sociedad del conocimiento  

Microsoft Academic Search

La relacin entre competitividad econmica y posicionamiento de los territorios en la sociedad del conocimiento cobra cada vez mayor protagonismo. Despiertan as especial inters aquellos mbitos que realizan un esfuerzo por incrementar la produccin, difusin y aplicacin de conocimiento para mejorar el funcionamiento de sus empresas y la calidad de vida de sus habitantes.\\u000aPor su parte, las ciudades se

Ricardo Mndez Gutirrez del Valle; Luis Abad Aragn; Inmaculada Caravaca Barroso; Gema Gonzlez Romero



Solar hot water system installed at Las Vegas, Nevada  

NASA Technical Reports Server (NTRS)

A solar energy hot water system installed in a motor inn at Las Vegas, Nevada is described. The inn is a three story building with a flat roof for installation of the solar panels. The system consists of 1,200 square feet of liquid flat plate collectors, a 2,500 gallon insulated vertical steel storage tank, two heat exchangers, and pumps and controls. The system was designed to supply approximately 74 percent of the total hot water load.



Las Trans: Negotiating Gender, Personhood, and Citizenship in Chile  

Microsoft Academic Search

Las Trans, a group of male-to-female transgender residents living in Arica, Chile, challenge the strict dual-sex, dual-gender system of Chiles family-oriented society. Chile presents an especially interesting case when analyzing the social position of sexual minorities due to the countrys historically strong ties to the Catholic Church, and, on a political level, the experience of 17 years of dictatorship during

Sydney A. Hare




E-print Network

UNIVERSITY OF NEVADA, LAS VEGAS School of Social Work SWK 410.2 & SWK 410.2S Professor: Margaret Oakes, Ph.D. SOCIAL WORK PRACTICE I LCSW (Ca.), LMSW-ACP (Tx) Sprin 2003 Office Hours: Mon. 1:30-2:30, 5.M. Or by appointment Credits: 3 Email: Tel: (702) 895-1222 COURSE DESCRIPTION Social Work

Ahmad, Sajjad


GIS methodology for quantifying channel change in Las Vegas, Nevada  

USGS Publications Warehouse

This study applies spatial analyses to examine the consequences of accelerated urban expansion on a hydrologic system over a period of 24 years. Three sets of historical aerial photos are used in a GIS analysis to document the geomorphic history of Las Vegas Wash, which drains the rapidly growing Las Vegas urban area in southern Nevada. New spatial techniques are introduced to make quantitative measurements of the erosion at three specific time intervals in the hydrologic evolution of the channel and floodplain. Unlike other erosion studies that use two different elevation surfaces to assess erosion, this study used a single elevation surface to remove systematic and nonsystemic elevation errors. The spatial analysis quantifies channel changes for discrete time periods, calculates erosion volumes, and provides a foundation to examine how the specific mechanisms related to urban expansion have affected Las Vegas Wash. The erosion calculated over 24 years is the largest documented sediment loss attributed to the effect of rapid urban growth. ?? 2007 American Water Resources Association.

Buckingham, S.E.; Whitney, J.W.



Instantnea de los cnceres de hgado y de las vas biliares

Informacin sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre los cnceres de hgado y de las vas biliares; as como ejemplos de actividades del NCI y adelantos en la investigacin de estos tipos de cncer.


40 CFR 81.80 - Las Vegas Intrastate Air Quality Control Region.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Las Vegas Intrastate Air Quality Control Region. 81.80 Section 81...CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions 81.80 Las Vegas...




E-print Network

365ENSE?ANZA DE LAS CIENCIAS, 2004, 22(3), 365­378 ALGUNAS POSIBILIDADES DELARTÍCULO DE los artículos científicos como un recurso para la enseñanza de las ciencias. Se analizan las cuestionar ideas inadecuadas sobre la ciencia y el conocimiento científico. Palabras clave. Enseñanza de las

Campanario, Juan Miguel


La Universidad de Alicante inaugura las X Jornadas de Redes de Investigacin en Docencia Universitaria  

E-print Network

La Universidad de Alicante inaugura las X Jornadas de Redes de Investigación en Docencia edición de las Jornadas Redes de Investigación Universitaria, en el Salón de Actos del Aulario II, con la participación y el compromiso de la comunidad universitaria" como tema central, las X Jornadas Redes de

Escolano, Francisco


El financiamiento de la educacin pblica en el Per: el rol de las familias  

Microsoft Academic Search

Las familias que matriculan a sus hijos en escuelas pblicas en el Per financian una parte importante de la educacin de sus hijos. Saavedra, Melzi y Miranda (1997) muestran que casi un tercio de lo que la sociedad peruana en su conjunto gasta en los nios matriculados en las escuelas pblicas corresponde a contribuciones de las familias. Parte de estas

Jaime Saavedra; Pablo Suarez



O R E G O N Informe Final Sobre el Estudio de las  

E-print Network

WASHINGTON O R E G O N IDAHO HANFORD Resumen del Informe Final Sobre el Estudio de las Enfermedades de la Tiroides en Hanford Acerca del Estudio Sobre las Enfermedades de la Tiroides en Hanford. (HTDS por su sigla en inglés) El estudio sobre las enfermedades de la tiroides en Hanford (HTDS por su sigla


Tecnologa de informacin e innovacin. Factores clave de la competitividad en las pequeas y medianas empresas  

Microsoft Academic Search

En el presente trabajo se muestran algunas polticas ejecutadas por el gobierno nacional, en funcin de im- pulsar el desarrollo cientfico y tecnolgico del pas, as como las principales limitaciones que presentan las peque- as y medianas empresas (pymes) para acceder a las tecnologas de informacin y comunicacin, tomando como base los resultados de un diagnstico efectuado a 8 pymes

Leal Morantes; Miraidy Elena


Taller de Ciencia para Jvenes para alumnos de bachillerato San Cristobal de las Casas, Chiapas  

E-print Network

Taller de Ciencia para Jóvenes para alumnos de bachillerato San Cristobal de las Casas, Chiapas 3-7 agosto, 2009 CONVOCATORIA El "Taller de Ciencia para Jóvenes" en San Cristobal de las Casas (Chiapas), está dirigido a los alumnos de escuelas de nivel bachillerato que se sienten atraidos a las ciencias

Bor, Gil



E-print Network

INVESTIGACI?N DIDÁCTICA 179ENSE?ANZA DE LAS CIENCIAS, 1999, 17 (2), 179-192 ¿C?MO ENSE?AR CIENCIAS de las Ciencias. Departamento de Física. Universidad de Alcalá de Henares. 28871 Alcalá de Henares ciencias ha identifi- cado diversas dificultades en los procesos de aprendiza- je de las ciencias que

Campanario, Juan Miguel



E-print Network


Campanario, Juan Miguel



E-print Network

93ENSE?ANZA DE LAS CIENCIAS, 2004, 22(1), 93­104 EL ENFOQUE CONEXIONISTA EN PSICOLOGÍA COGNITIVA Y ALGUNAS APLICACIONES SENCILLAS EN DIDÁCTICA DE LAS CIENCIAS Campanario, Juan Miguel Aprendizaje de las Ciencias. Departamento de Física. Universidad de Alcalá juan

Campanario, Juan Miguel



E-print Network


Campanario, Juan Miguel


Language Assessment Scales, LAS I, for Grades K-5, English/Spanish. Second Edition.  

ERIC Educational Resources Information Center

Language Assessment Scales, LAS I, are designed for children in grades K-5. LAS I accommodates ethnic and linguistic differences and provides direct language activities taken from the popular culture of both English- and Spanish-speaking peoples. LAS I consists of two independent tests, one in English and the other in Spanish, presented largely on

De Avila, Edward A.; Duncan, Sharon E.


Persisten las diferencias de cncer de seno en hispanas con el mismo acceso a la atencin mdica

Con el mismo acceso a servicios mdicos, persisten las diferencias en cuanto al tamao, el estadio y el grado del cncer de seno en las mujeres hispanas en comparacin con las mujeres blancas no hispanas.


Mecanismos de Acción de las Auxinas y los Herbicidas Auxínicos  

NSDL National Science Digital Library

Se muestra como las auxinas y los herbicidas auxínicos pueden inducir respuestas celulares y se describe el transporte basípeto de las auxinas. También se muestra como los receptores de auxinas reconocen las auxinas y los herbicidas auxínicos, los cuales inducen entonces la transmisión y traducción de señales para activar varios genes; el papel de los productos de esos genes en las respuestas de las plantas es también mostrado.


Las tecnologas de informacin geogrfica y su aplicacin al anlisis urbano. El caso del estudio de los espacios residenciales cerrados en las reas metropolitanas de Santiago y Valparaso  

Microsoft Academic Search

El artculo centra su atencin en los aspectos metodolgicos relacionados con el diseo y confeccin de una base de datos georeferenciada que detalla los espacios residenciales cerrados edificados en las reas metropolitanas de Santiago y Valparaso. En la elaboracin de dicho instrumento desempean un papel relevante las tecnologas de informacin geogrfica (TIG), entendidas como los Sistemas de Informacin Geogrfica (SIG)

Ma. Luisa Rodrigo Hidalgo; Lily lvarez Correa; Alejandro Salazar Barrows; Rodrigo Lazcano; Francisco Roa; Daniela Fuentes



Revision curricular a partir de un analisis comparativo de las discrepancias en los curriculos de una escuela de optometria en Puerto Rico con las competencias requeridas para las agencias de revalida y acreditacion 2004  

NASA Astrophysics Data System (ADS)

El proposito de esta investigacion, un estudio cualitativo de caso, fue comparar y contrastar el curriculo vigente de la Escuela de Optometria de la UIAPR con las competencias y estandares requeridos por las agencias de acreditacion y de revalida. Con este proposito, decidimos realizar una revision y un analisis de documentos: el prontuario de cada uno de los cursos de los curriculos implantados en el 1993 y en el 2001; las competencias y estandares establecidos por las agencias de revalida y de acreditacion; y las estadisticas en las que se analiza el porcentaje de estudiantes que aprueban cada una de las partes de los examenes de revalida entre el 1998 al 2003. Se realizaron entrevistas dirigidas para dar apoyo y complementar la revision y el analisis de estos documentos. Los participantes de las entrevistas fueron tres estudiantes de la clase de optometria del 2004 (ultima clase del curriculo del 1993); tres estudiantes de la clase de optometria del 2005 (primera clase graduanda del curriculo vigente) y tres profesores y/o directores de los Departamentos de Ciencias Basicas, Ciencias Clinicas y Cuidado al Paciente. Esta investigacion se enmarco en el modelo de evaluacion curricular de discrepancia de Malcolm Provus y en el modelo de desarrollo basado en competencias. Uno de los hallazgos mas importantes del estudio es que los cambios que se implantaron al curriculo del 2001 no han logrado que los estudiantes mejoren su ejecucion en los examenes de revalida. Por otro lado, se encontro que el curriculo vigente atiende completamente los estandares de la practica de Optometria, pero no las competencias. Esta informacion fue validada mediante el uso de una tabla de cotejo para el analisis de los cursos y de la informacion obtenida de las entrevistas. El estudio determina y concluye que existen discrepancias entre los prontuarios de los cursos del curriculo y las competencias requeridas por la agencia de revalida. Segundo, que el Departamento de Ciencias Basicas es el que presenta mas deficiencias en el desarrollo de las competencias. El investigador recomienda disenar e implantar un curriculo basado en competencias y proveer formacion en didactica y procesos de aprendizaje a los profesores.

Rivera Pacheco, Andres


Clusters and Superclusters in the Sloan and Las Campanas Surveys  

E-print Network

We generate the 2-dimensional high-resolution density field of galaxies of the Early Data Release of the Sloan Digital Sky Survey and the Las Campanas Redshift Survey with a smoothing length 0.8 Mpc/h to extract clusters and groups of galaxies, and a low-resolution field with a smoothing length 10 Mpc/h to extract superclusters of galaxies. We investigate properties of density field clusters and superclusters and compare the properties of these clusters and superclusters with those of Abell clusters, and superclusters found on the basis of Abell clusters. We found that clusters in a high-density environment have a luminosity a factor of 5 - 10 higher than in a low-density environment. Clusters and superclusters in the Northern slice of SDSS are much richer than those in the Southern slice.

J. Einasto



LAS homolog distribution shift during wastewater treatment and composting ecological implications  

SciTech Connect

The behavior of LAS (linear alkylbenzene sulfonate) in different environmental compartments was studied through wastewater treatment process steps in sewage treatment plants of Alicante and Benidorm (activated sludge type) as well as in Guardamar (lagoons). The fate of LAS, using a specific HPLC method, was monitored during treatment sludge compostage and soil amendment operations. Finally, the marine sediments close to a submarine wastewater sewer outfall were analyzed. The results show significant differences between distribution of LAS homologs in water and solids (sludges, sediments, and soils), as compared to the original distribution in detergent formulations, yielding a lower LAS average molecular weight in water samples. The change observed in the homolog distribution of LAS implies a reduction in the toxicity to Daphnia, because a lower average molecular weight of LAS is less toxic.

Prats, D.; Ruiz, F.; Vazquez, B.; Zarzo, D. (Univ. of Alicante (Spain). Div. Chemical Engineering); Berna, J.L.; Moreno, A. (Petresa, Madrid (Spain))



Effect of linear alkylbenzene sulphonates (LAS) on the anaerobic digestion of sewage sludge  

Microsoft Academic Search

Batch anaerobic biodegradation tests with different alkylbenzene sulphonates (LAS) at increasing concentrations were performed in order to investigate the effect of LAS homologues on the anaerobic digestion process of sewage sludge. Addition of LAS homologues to the anaerobic digesters increased the biogas production at surfactant concentrations ?510g\\/kg dry sludge and gave rise to a partial or total inhibition of the

M. T. Garcia; E. Campos; J. Snchez-Leal; I. Ribosa



Contribucin al flujo infrarrojo de las estrellas Be de la recombinacin dielectrnica del MgII  

NASA Astrophysics Data System (ADS)

Para evaluar la contribucin del proceso de recombinacin dielectrnica del tomo de MgII al exceso de flujo infrarrojo observado en las estrellas Be, calculamos la energa emitida en las lneas originadas por este proceso. Se evaluaron los efectos de las condiciones fsicas del medio, como la temperatura electrnica y la densidad electrnica, sobre el flujo emitido. Se consider tambin la influencia de una posible opacidad.

Cruzado, A.; di Rocco, H.; Ringuelet, A.


City of Las Vegas Plug-in Hybrid Electric Vehicle Demonstration Program  

SciTech Connect

The City of Las Vegas was awarded Department of Energy (DOE) project funding in 2009, for the City of Las Vegas Plug-in Hybrid Electric Vehicle Demonstration Program. This project allowed the City of Las Vegas to purchase electric and plug-in hybrid electric vehicles and associated electric vehicle charging infrastructure. The City anticipated the electric vehicles having lower overall operating costs and emissions similar to traditional and hybrid vehicles.




La Transpiración - Movimiento del Agua a Través de las Plantas  

NSDL National Science Digital Library

La transpiración es la pérdida de agua en forma de vapor por las plantas. El agua es absorbida del suelo por las raíces y transportada en forma líquida por el xilema hacia las hojas. En las hojas, unos pequeos poros permiten que el agua (H2O) escape a la atmósfera en forma de vapor, al tiempo que se permite la entrada de bióxido de carbono (CO2) para la fotosíntesis. De toda el agua absorbida por las plantas, menos del 5% es retenida y utilizada para crecimiento y almacenamiento. En esta lección se explicará porque las plantas pierden tanta agua, la ruta que ésta sigue dentro de la planta, como pudieran las plantas controlar la pérdida excesiva de agua y como las condiciones ambientales influyen en la pérdida de agua por las plantas.


Stationary Phase-Specific Virulence Factor Overproduction by a lasR Mutant of Pseudomonas aeruginosa  

PubMed Central

Secreted virulence factors of the human pathogen Pseudomonas aeruginosa are often under quorum sensing control. Cells lacking the quorum-sensing regulator LasR show reduced virulence factor production under typical laboratory conditions and are hypo-virulent in short-term animal infection models, yet lasR mutants are frequently associated with long-term infection in cystic fibrosis patients. Here, I show that in stationary-phase or slow-growth conditions, lasR cells continuously and strongly produce the important virulence factor pyocyanin while wild-type cells do not. Pyocyanin overproduction by lasR cells is permitted by loss of repression by RsaL, a LasR-dependent negative regulator. lasR cells also contribute pyocyanin in mixed cultures, even under cheating conditions where they depend on their wild-type neighbors for nutrients. Finally, some clinical P. aeruginosa isolates with lasR mutations can overproduce pyocyanin in the laboratory. These results imply that slow-growing clinical populations of lasR cells in chronic infections may contribute to virulence by producing pyocyanin under conditions where lasR+ cells do not. PMID:24533146

Cabeen, Matthew T.



La ciencia del lenguaje estudia el fenmeno de las TIC, redes sociales y nuevas formas de comunicacin en la UA  

E-print Network

La ciencia del lenguaje estudia el fenómeno de las TIC, redes sociales y nuevas formas de comunicación en la UA Alicante, 8 de marzo de 2013 Las TIC, las redes sociales y las nuevas formas de.0: las TIC, redes sociales y nuevas formas de comunicación" comienza el lunes 11 de marzo de 2013 y hasta

Escolano, Francisco


La Fundacin Banesto y el Observatorio de Insercin Laboral de la Universidad de Alicante ensearn a las PYMES el uso de las redes  

E-print Network

a las PYMES el uso de las redes sociales para mejorar sus negocios Alicante, 7 de septiembre de 2011 Dirigido a empresarios, emprendedores y comerciantes, el taller "Redes Sociales y Web 2.0: cómo vender más Alicante a participar en el taller "Redes Sociales y Web 2.0: cómo vender más y mejor. En el taller, que

Escolano, Francisco


Fronteras del saber cientfico: reflexin epistemolgica sobre las investigaciones fundamentales y praxeolgicas en las ciencias de la educacin en torno al trabajo  

E-print Network

praxeológicas en las ciencias de la educación en torno al trabajo docente1 Javier NUNEZ MOSCOSO Doctorando en Ciencias de la Educación2 UMR ­ EFTS (Education, Formation, Travail, Savoirs) Université de Toulouse II le de Chile, Facultad de Educación Correspondencia: Resumen Las ciencias de la

Paris-Sud XI, Université de


Optimization of linear alkylbenzene sulfonate (LAS) degradation in UASB reactors by varying bioavailability of LAS, hydraulic retention time and specific organic load rate.  


Degradation of linear alkylbenzene sulfonate (LAS) in UASB reactors was optimized by varying the bioavailability of LAS based on the concentration of biomass in the system (1.3-16 g TS/L), the hydraulic retention time (HRT), which was operated at 6, 35 or 80 h, and the concentration of co-substrates as specific organic loading rates (SOLR) ranging from 0.03-0.18 g COD/g TVS.d. The highest degradation rate of LAS (76%) was related to the lowest SOLR (0.03 g COD/g TVS.d). Variation of the HRT between 6 and 80 h resulted in degradation rates of LAS ranging from 18% to 55%. Variation in the bioavailability of LAS resulted in discrete changes in the degradation rates (ranging from 37-53%). According to the DGGE profiles, the archaeal communities exhibited greater changes than the bacterial communities, especially in biomass samples that were obtained from the phase separator. The parameters that exhibited more influence on LAS degradation were the SOLR followed by the HRT. PMID:23196232

Okada, Dagoberto Y; Delforno, Tiago P; Esteves, Andressa S; Sakamoto, Isabel K; Duarte, Iolanda C S; Varesche, Maria B A



Surveys, Temporal Variability, and the Las Cumbres Observatory Global Telescope  

NASA Astrophysics Data System (ADS)

Upcoming wide-field surveys such as Pan-STARRS, LSST, and Skymapper will detect large numbers of objects that vary photometrically, or that move. These objects will include small bodies in the solar systema, eclipsing binary stars, transiting extrasolar planets, pulsating stars, dwarf novae, novae, supernovae, active galactic nuclei, and quite possibly other transient phenomena for which we have no names as yet. Although they will be a fertile source of such transient detections, wide-field surveys themselves ordinarily will have neither the observing cadence nor the (e.g., spectroscopic) observing capabilities to perform adequate follow-up observations of these variable objects. The Las Cumbres Observatory Global Telescope (LCOGT) will be a global network of moderate-aperture (2m and smaller) telescopes, instrumented and interconnected so as to facilitate such in-depth variability studies. The LCOGT now operates the two 2m Faulkes Telescopes: FT North located on the island of Maui, and FT South at the Siding Spring site in Australia. These telescopes will anchor a network of about 7 clusters of 1m-class telescopes, each cluster containing 4 telescopes. First-light instruments will provide visible-light and NIR imaging; spectroscopic capabilities will come later, and will likely include both low- and high-resolution visible-light spectrographs. Scheduling and coordination of observations will be provided from a central site, in pursuit of a single set of scientific goals.

Brown, Tim; Rosing, W. E.; Baliber, N.; Hidas, M.; Street, R.



Assembly Bias of Dark Matter Halos in LasDamas  

NASA Astrophysics Data System (ADS)

Assembly bias of dark matter halos refers to the phenomenon in which the clustering of dark matter halos of a fixed mass depends significantly on a second property, in particular: age, concentration or spin. This discovery suggests a challenge for halo occupation distribution and other models that connect galaxy properties solely to halo mass. To investigate assembly bias we use the Large Suite of Dark Matter Simulations (LasDamas) to calculate the large-scale clustering of distinct halos as a function of a variety of properties including mass. We first investigate whether some property other than mass is better able to single-handedly predict clustering, i.e., eliminate the need for a second parameter, but we find no such property. Noting that for many halos the current mass is significantly lower than the peak mass it attained over its history, we revisit assembly bias using only halos that have maintained a significant fraction of their peak mass. We find that the dependence of clustering on a second halo parameter is significantly reduced without the inclusion of these high mass-loss halos. This strongly suggests that part of the theoretical explanation for assembly bias may be that a large fraction of halos do not continually grow in mass, as assumed in spherical collapse models, but instead lose significant amounts of their mass at later times due to interactions with other halos.

Salcedo, Andres Nicolas; Berlind, Andreas A.; Maller, Ariyeh; Sinha, Manodeep



La Gaceta de la RSME, Vol. 00 (0000), Num. 0, Pags. 117 1 Las Medallas Fields  

E-print Network

de Leovigildo Alonso Tarr´io y Ana Jerem´ias L´opez Este a~no el premio Abel ha reca´ido sobre el miembro extranjero de la Academia Nacional de las Ciencias de U.S., de la Academia Americana de las Artes

Guijarro, Luis


INTERNET 2 : Las nuevas redes del futuro Juan Manuel Torres Moreno  

E-print Network

INTERNET 2 : Las nuevas redes del futuro Juan Manuel Torres Moreno Laboratorio Nacional de más virtual) pero aún mas impactante: la revolución de las redes de computadoras. Internet ha supuesto idea de federar varias redes que usaran la conmutación de paquetes y un protocolo de enlace llamado NCP

Avignon et des Pays de Vaucluse, Université de


La Drosophila de las alas manchadas Una nueva plaga invasora en los frutales de Michigan  

E-print Network

La Drosophila de las alas manchadas Una nueva plaga invasora en los frutales de Michigan Rufus Bulletin E-3140SP New · November 2010 Introducción La mosca Drosophila de alas manchadas (Drosophila mayoría de las moscas del vinagre atacan cuando la fruta esta dañada. A diferencia de estas, la Drosophila


El papel de las instituciones educativas pblicas en la eliminacin de la pobreza  

Microsoft Academic Search

Este trabajo presenta un conjunto de propuestas que contribuiran a fortalecer el papel de las instituciones educativas en la eliminacin de la pobreza. Se trata de un conjunto de acciones por parte del Gobierno y las instituciones educativas que podra hacer ms eficiente el gasto pblico en educacin. El documento es el resul tado del trabajo de campo realizado en

Blanca Zuluaga; Diego Bonilla



Las espirales de Fibonacci podran estar relacionadas con la tensin 26/04/2007 Astroseti  

E-print Network

Las espirales de Fibonacci podrían estar relacionadas con la tensión 26/04/2007 Astroseti Las espirales de Fibonacci podrían estar relacionadas con la tensión. La serie de Fibonacci ­ en la cual cada tensión" para crear espirales con la serie de Fibonacci en microestructuras que crecen en laboratorio

Zexian, Cao


Manejo estratgico de la calidad ambiental en las cadenas agroalimentarias. Aplicaciones a la arveja china guatemalteca  

Microsoft Academic Search

Desde la perspectiva de las cadenas globales de mercancas, considerando la secuencia de actividades insumo-producto (principalmente produccin primaria, procesamiento, comercializacin y uso final), este artculo analiza las interacciones (horizontales) entre productores agrcolas como un juego del tipo dilema del prisionero. El resultado esperado es un equilibrio Nash en el cual los productores se quedan atados al uso de tecnologas no

Gerardo Jimnez Porras; Wim Pelupessy




EPA Science Inventory

Sodium Perchlorate and ammonium Perchlorate, major components of solid rocket fuel, have been manufactured in the Las Vegas Valley immediately up gradient from the Las Vegas Wash, since 1945 and 1956, respectively. Measurements of emerging ground water quality in the vici...



Microsoft Academic Search

Analizamos la evolucin del turismo hotelero en el perodo 2001-2008, en las regiones y provincias espaolas, utilizando las estadsticas de pernoctaciones hoteleras como indicador. Presentamos una sntesis de resultados de varios modelos economtricos del turismo regional en Espaa, tanto en lo que respecta a los factores que influyen en el desarrollo turstico como al impacto que el turismo tiene en

M. C. Guisan; E. Aguayo



La concentracin estacional en las regiones espaolas desde una perspectiva de la oferta turstica  

Microsoft Academic Search

RESUMEN La estacionalidad es un fenmeno muy singular en el turismo y es de gran relevancia para los responsables de las organizaciones y destinos tursticos. En el presente trabajo tratamos de analizar la estacionalidad de la oferta turstica en Espaa y, especialmente, en las Comunidades Autnomas. Tratamos de comprobar los niveles de estacionalidad de la oferta turstica en funcin de

Jess Manuel Lpez Bonilla; Luis Miguel Lpez Bonilla



Poder de Mercado en las Profesiones Autorreguladas: El Desempeo Mdico en Argentina  

Microsoft Academic Search

La naturaleza potencialmente anticompetitiva de las prcticas impartidas desde las organizaciones de profesionales ha sido racionalizada por la literatura econmica y ha ocupado un lugar no menor en la agenda de los organismos de defensa de la competencia. Sin embargo, la economa emprica carece de estudios sobre el ejercicio profesional autorregulado. Este trabajo relaciona los mercados de servicios profesionales con

Evelyn Vezza



Anaerobic bioprocessing of sewage sludge, focusing on degradation of linear alkylbenzene sulfonates (LAS)  

Microsoft Academic Search

Anaerobic degradation of sludge amended with linear alkylbenzene sulfonates (LAS) was tested in a one stage continuous stirred tank reactor (CSTR) and a two stage reactor system consisting of a CSTR as first step and upflow anaerobic sludge bed (UASB) reactor as the second step. Anaerobic removal of LAS was only observed at the second step but not at the

I. Angelidaki; L. Torng; C. M. Waul; J. E. Schmidt


Pluralidad terica, metodolgica y tcnica en el abordaje de las redes sociales: hacia la \\  

Microsoft Academic Search

Discutiendo sobre algunos trabajos que se presentan en el volumen noveno de la Revista Redes. Revista Hispana para el anlisis de las redes sociales, este artculo incorpora un conjunto de reflexiones sobre el anlisis de las redes sociales argumentando que esta especfica rea de anlisis se encuentra en un cruce de caminos interdisciplinarios que vienen aportando recientemente ideas adicionales para

Estrella Gualda Caballero



Comunidades de partidarios en redes sociales: estudio de las elecciones catalanas de 2010 y 2012  

E-print Network

Comunidades de partidarios en redes sociales: estudio de las elecciones catalanas de 2010 y de reclutamiento de un movimiento social en redes sociales (Lotan, 2011; Grossman, 2009; Choudhary como fluye la información de los partidos/organizaciones en las redes sociales y la formación de

Moro, Esteban


Impacto de las redes sociales de pacientes en la prctica asistencial  

Microsoft Academic Search

Las redes sociales de pacientes son espacios virtuales donde pacientes con condiciones similares se ponen en contacto y comparten tratamientos y problemas de salud. Estas redes ofrecen a las personas con problemas especficos de salud la oportunidad de compartir experiencias, buscar, recibir y proveer informacin, consejos e incluso apoyo emocional online. Pero, cul es el impacto de estas redes en

Elena Torrente; Joan Escarrabill; Tino Mart



Problem-Solving in Las Vegas: Students Are Building Skills and a Global Network.  

ERIC Educational Resources Information Center

Describes a project initiated at Silverado High School in Las Vegas, where students from Las Vegas and schools across the United States monitor the levels of radon in the atmosphere. Enables students to learn first hand about the collection, analysis, and interpretation of scientific data and to network with other students from the United States

Budd, Gregory; Curry, Don



Chris Quigg Las revoluciones por venir en Fsica de Partculas Museo de la Ciencia Chris Quigg  

E-print Network

Chris Quigg · Las revoluciones por venir en Física de Partículas · Museo de la Ciencia Chris Quigg Ciencias Fisicas no nostenga reservadas maravillas aún más impresionantes que aquellas del pasado, parece Ciencias Físicas deberán ser buscadas en las sextas cifras decimales." Tres revoluciones de Galileo Eppur

Quigg, Chris



E-print Network


Campanario, Juan Miguel



E-print Network

INVESTIGACI?N DIDÁCTICA ENSE?ANZA DE LAS CIENCIAS, 1999, 17 (3), 397-410 397 LA CIENCIA QUE NO ENSE?AMOS CAMPANARIO, JUAN MIGUEL Grupo de Investigación en Aprendizaje de las Ciencias. Departamento de capaces de entender la realidad que les rodea y puedan comprender el papel de la ciencia en nuestra

Campanario, Juan Miguel



E-print Network

161ENSE?ANZA DE LAS CIENCIAS, 2003, 21 (1), 161-172 INNOVACIONES DIDÁCTICAS DE LA NECESIDAD, VIRTUD, metacognition, teaching activities. #12;INNOVACIONES DIDÁCTICAS 162 ENSE?ANZA DE LAS CIENCIAS, 2003, 21 (1) 1 ciencias, sirven como ma- teriales de consulta y referencia y, tal vez algo ingenua- mente, se tiende

Campanario, Juan Miguel



EPA Science Inventory

Climate change, land use change, and population growth are fundamental factors affecting future hydrologic conditions in streams, especially in arid regions with scarce water resources. Located in the arid southwest, Las Vegas Valley located within the Las Vegas Wash watershed is...


Savater y Recalde conferencian en las IX Jornadas de Derecho penal, Derecho penitenciario y Criminologa  

E-print Network

Savater y Recalde conferencian en las IX Jornadas de Derecho penal, Derecho penitenciario y conferencias que se han expuesto en el segundo día de las IX Jornadas de Derecho penal, Derecho penitenciario y Ortega y el posterior seminario-debate con los profesores del Área de Derecho Penal. DIRECCI?N POSTAL

Escolano, Francisco


78 FR 43772 - Modification of Class B Airspace; Las Vegas, NV  

Federal Register 2010, 2011, 2012, 2013, 2014

...12-AWA-5] RIN 2120-AA66 Modification of Class B Airspace; Las Vegas, NV AGENCY: Federal...action modifies the Las Vegas, NV, Class B airspace area to ensure the containment of large turbine-powered aircraft within Class B airspace, reduce air traffic...



77 FR 65332 - Proposed Modification of Class B Airspace; Las Vegas, NV  

Federal Register 2010, 2011, 2012, 2013, 2014

...2120-AA66 Proposed Modification of Class B Airspace; Las Vegas, NV AGENCY: Federal...proposes to modify the Las Vegas, NV, Class B airspace area to ensure the containment of large turbine-powered aircraft within Class B airspace, reduce air traffic...



Magnetotelluric study of the Las Caadas caldera (Tenerife, Canary Islands): structural and hydrogeological implications  

Microsoft Academic Search

The Las Caadas caldera in Tenerife (Canary Islands) is a well-exposed caldera depression in which the active TeidePico Viejo complex stands. In addition to its volcanological interest, the Las Caadas caldera also holds the main groundwater reservoir of Tenerife. An audiomagnetotelluric and magnetotelluric survey was carried out in order to image the interior of the caldera depression. The field campaign

Jaume Pous; Wiebke Heise; Pierre-Andr Schnegg; Gerard Muoz; Joan Mart??; Carles Soriano



Managing Floods and Resources at the Arroyo Las Positas  

SciTech Connect

Engineers and water resource professionals are challenged with protecting facilities from flood events within environmental resource protection, regulatory, and economic constraints. One case in point is the Arroyo Las Positas (ALP), an intermittent stream that traverses the Lawrence Livermore National Laboratory (LLNL) in Livermore, California. Increased runoff from post-drought rainfall, upstream development, and new perennial discharges from LLNL activities have resulted in increased dry weather flows and wetland vegetation. These new conditions have recently begun to provide improved habitat for the federally threatened California red-legged frog (Rana aurora draytonii; CRLF), but the additional vegetation diminishes the channel's drainage capacity and increases flood risk. When LLNL proposed to re-grade the channel to reestablish the 100-year flood capacity, traditional dredging practices were no longer being advocated by environmental regulatory agencies. LLNL therefore designed a desilting maintenance plan to protect LLNL facility areas from flooding, while minimizing impacts to wetland resources and habitat. The result was a combination of structural upland improvements and the ALP Five Year Maintenance Plan (Maintenance Plan), which includes phased desilting in segments so that the entire ALP is desilted after five years. A unique feature of the Maintenance Plan is the variable length of the segments designed to minimize LLNL's impact on CRLF movement. State and federal permits also added monitoring requirements and additional constraints on desilting activities. Two years into the Maintenance Plan, LLNL is examining the lessons learned on the cost-effectiveness of these maintenance measures and restrictions and reevaluating the direction of future maintenance activities.

Sanchez, L; Van Hattem, M; Mathews, S



LasR, a Transcriptional Activator of Pseudomonas aeruginosa Virulence Genes, Functions as a Multimer  

Microsoft Academic Search

The Pseudomonas aeruginosa LasR protein functions in concert with N-3-oxo-dodecanoyl-L-homoserine lac- tone (3O-C12-HSL) to coordinate the expression of target genes, including many genes that encode virulence factors, with cell density. We used a LexA-based protein interaction assay to demonstrate that LasR forms multimers only when 3O-C12-HSL is present. A series of LasR molecules containing internal deletions or substitutions in single,

Pattarachai Kiratisin; Kenneth D. Tucker; Luciano Passador




Microsoft Academic Search

Este estudio recoge los resultados acerca de la oferta de las empresas de Turismo de Naturaleza (TN) del municipio de Cabo Corrientes, Jal. Las cuales no cuentan con propuestas formales de oferta, y esto disminuye en gran manera la competitividad, desarrollo y progreso de las empresas de TN, as como el crecimiento de la poblacin rural que soporta a estas.

Rodrigo Espinoza Snchez; Erika Chvez Flix; Edmundo Andrade R; Rosa Ma. Chvez D



Las difciles relaciones entre teora, prctica y metodologa en la psicologa del siglo XXI. (I) Sobre algunas disyuntivas  

Microsoft Academic Search

Las decisiones prcticas en las ciencias del comportamiento se han venido apoyando en conocimientos supuestamente obtenidos a partir de indagaciones que, tambin supuestamente, siguen las normas de la investigacin cientfica. Retomar la distincin entre sistemas sociales y epistemolgicos implicada en la oposicin entre el sistema ciencia-tcnica y el sistema interaccin-comunicacin permite entender por qu la llamada investigacin cientfica en el

Juan Delgado Snchez-Mateos



Estrategia curricular infotecnolgica para el uso de las redes sociales en la formacin del profesional de la educacin  

Microsoft Academic Search

Las Universidades de Ciencias Pedaggicas, tienen como encargo social la formacin integral de los profesionales de la educacin, en los contextos actuales con la gran diversidad de informacin cada vez ms voluminosa y mvil, se precisa de un proceso formativo direccionado hacia la gestin del conocimiento mediante el empleo de las Tecnologas de la Informacin y las Comunicaciones (TIC). La

Rosa Lidia Martnez Cabrales; Miriam Roll Hechavarra



Revista Electrnica de Enseanza de las Ciencias Vol. 2 N 2 (2003) Metalibros: La construccin colectiva de un recurso  

E-print Network

Revista Electrónica de Enseñanza de las Ciencias Vol. 2 Nº 2 (2003) Metalibros: La construcción Internet Juan Miguel Campanario Grupo de Investigación sobre Aprendizaje de las Ciencias. Departamento de enseñanza de las ciencias. Palabras clave: Libros de texto, nuevas tecnologías, renovación educativa

Campanario, Juan Miguel


V SEMINARIO HISPANO-ARGENTINO: Los discursos sobre la Ciencia y las Nuevas Tecnologas en la Sociedad del Conocimiento  

E-print Network

V SEMINARIO HISPANO-ARGENTINO: Los discursos sobre la Ciencia y las Nuevas Tecnologías en la Universidad Nacional del Litoral (Argentina), se centra este año en los "Discursos sobre la Ciencia y las procede, esta vez centrando la atención en el discurso de la ciencia y de las nuevas tecnologías. Se

Escolano, Francisco


Las IX Jornadas de Derecho penal, Derecho penitenciario y Criminologa en la UA reflexionan sobre el nuevo panorama del terrorismo  

E-print Network

Las IX Jornadas de Derecho penal, Derecho penitenciario y Criminología en la UA reflexionan sobre socio-criminológica" es el tema sobre el que se centran las IX Jornadas de Derecho penal, Derecho, Jesús Pradells, y a la decana de la Facultad de Derecho de la UA, Amparo Navarro. Las Jornadas, que se

Escolano, Francisco


Language Assessment Scales, Level 2, LAS II, for Grades 6 and Up, English/Spanish. Examiner's Manual.  

ERIC Educational Resources Information Center

Language Assessment Scales, Level 2 (LAS II) are used to assess the linguistic proficiency of limited-English-speaking or non-English-speaking adolescents. LAS II, like its predecessor, LAS I, provides a picture of oral linguistic proficiency based on a student's performance across four linguistic subsystems: phonemic, lexical, syntactic and

Duncan, Sharon E.; De Avila, Edward A.


The Las Caadas caldera (Tenerife, Canary Islands): an overlapping collapse caldera generated by magma-chamber migration  

Microsoft Academic Search

The Las Caadas caldera is one of the most important geological structures of Tenerife. Stratigraphic, structural, volcanological, petrological, geochronological, and geophysical data suggest that the Las Caadas caldera resulted from multiple vertical collapse episodes that occurred during the construction of the Las Caadas edifice Upper Group. Three long-term (?200ka) cycles of phonolitic explosive activity, each culminating with a caldera collapse,

J. Marti; A. Gudmundsson



El teatro de Osvaldo Dragn y las poticas teatrales de Buenos Aires en los cincuentas  

E-print Network

destruido por el medio social. Aldo advierte las contradicciones sociales, "se desaliena," toma conciencia, del canibalismo de la sociedad (el villano) que deglute a Ral, el futbolista y Gregorio, el arribista. Y lo explicita: Esa noche se acentu en m...

Pellettieri, Osvaldo



Como Mantienen la Competividad las Multinacionales de Economias Emergentes? El Case de CEMEX  

E-print Network

La creciente presencia de multinacionales de pases emergentes (EMNEs) entre las empresas ms importantes del mundo hace necesario entender cules son los factores que determinan la sostenibilidad de sus ventajas competitivas ...

Lucea, Rafael


Double star images taken by HST WFPC and Las Campanas Observatory  

NASA Technical Reports Server (NTRS)

Comparison of the same area of sky (a double star) taken by the Hubble Space Telescope (HST) wide field planetary camera (WFPC) and ground-based image taken from the Las Campanas Observatory, Carnegie Institute of Washington.



Pottery engineering in ancient Guerrero, Mexico : the site of Las Fundiciones  

E-print Network

This thesis examines ancient pottery from the site of Las Fundiciones, Guerrero, Mexico. Because this site provides the only documented evidence of prehispanic metal smelting in Mesoamerica it is critical to examine artifacts ...

Reitzel, Hannah Lynn



Center for Gaming Research University Libraries | University of Nevada, Las Vegas  

E-print Network

1 Center for Gaming Research University Libraries | University of Nevada, Las Vegas Annual Report the Director................... 4 UNLV Gaming Press............................... 5 Collections Mission The Center for Gaming Research is a world-class hub for the scholarly analysis and public

Hemmers, Oliver


Ms all de las Fronteras (Beyond the Borders): Subnational Transnationalism and the State in Mexico  

E-print Network

MS ALL DE LAS FRONTERAS (BEYOND THE BORDERS): SUBNATIONAL TRANSNATIONALISM AND THE STATE IN MEXICO BY Rebecca J. Crosthwait Submitted to the graduate degree program in Anthropology and the Faculty of the Graduate School... ________________________________ Brent E. Metz Date defended: November 27, 2007 ii The Thesis Committee for Rebecca J. Crosthwait certifies that this is the approved version of the following thesis: MS ALL DE LAS FRONTERAS (BEYOND THE BORDERS): SUBNATIONAL...

Crosthwait, Rebecca Jeanne



Postmodernism and Feminism in Mexican Theatre: Aura y las once mil vrgenes by Carmen Boullosa  

E-print Network

SPRING 1995 55 Postmodernism and Feminism in Mexican Theatre: Aura y las once mil vrgenes by Carmen Boullosa Roselyn Costantino Mexican author Carmen Boullosa (Mexico City, 1954) is one of the most recognized and prolific writers of her... of postmodernism and feminisms. In order to place the study in context, an outline of issues involving the "crisis" of the transition in Mexican society follows. Finally, an analysis of Boullosa's play, Aura y las once mil vrgenes, shows how the author...

Costantino, Roselyn



V Festival Nacional del Nuevo Teatro: Las fuentes inagotables del arte  

E-print Network

Experimental de Cali (TEC) mostr su ms reciente produccin: Opera Bufa, la recreacin teatral de una compleja trama que alude a las dictaduras caribeas y cuyo referente histrico es la dinasta Somoza en Nicaragua. Para tal fin, el grupo investig... representacin. Frente a la escasa produccin dramatrgica que no alcanza en ningn momento a suplir las necesidades escnicas de los numerosos grupos existentes en el pas, no slo La Candelaria y el TEC, conjuntos profesionales de robusta trayectoria...

Má rceles Daconte, Eduardo



Stratigraphic and structural controls on fluorspar mineralization in northern Valle Las Norias, Coahuila, Mexico  

E-print Network


Rapport, Eric John




E-print Network

. POLICY MAKING 2.0 LAS TIC, LA CIUDAD Y LA PARTICIPACI?N CIUDADANA SISTEMAS DE ENERGÍA Y MOVILIDAD URBANA las TIC para la participación ciudadana y la mejora de la movilidad, o los conocimientos necesarios Instituto de Ingeniería de España. PONENCIAS MOVILIDAD URBANA, ¿MOVILIDAD HUMANA? ANDR?S MONZ?N Catedrático

Cardeñosa, Jesús



E-print Network

INVESTIGACI?N DIDÁCTICA 45ENSE?ANZA DE LAS CIENCIAS, 2001, 19 (1), 45-56 INVOCACIONES Y USOS INADECUADOS DE LA CIENCIA EN LA PUBLICIDAD CAMPANARIO, JUAN MIGUEL,1 MOYA, AIDA2 y OTERO, JOS? C.3 Grupo de Investigación sobre el Aprendizaje de las Ciencias. Departamento de Física. Universidad de Alcalá. 28871 Alcalá

Campanario, Juan Miguel


Alonso Quijano en el Callejn del Gato: Las ficciones de psycho-killers espaolas  

E-print Network

cuando era nio en la novela negra, Alfred Hitchcock y Vzquez Montalbn. 6 ndice Introduccin: Esquizofrenia y violencia en la cultura herida . 7 El precio de una snuff movie: Globalizacin y espectculo en las... mximo exponente. Los resultados de la aceptacin de estos valores se manifiestan de un modo ms evidente en el uso de las snuff movies como smbolo principal del valor mercantil adquirido por la imagen violenta en la cultura herida y el uso del cuerpo...

Meijide Lapido, Arturo Francisco



Agier, Michel y Odile Hoffmann, 1999, Las tierras de las comunidades negras en el Pacfico colombiano: interpretaciones de la ley, estrategias de los actores. Territorios, Revista de estudios  

E-print Network

cuyos efectos directos es el de suscitar nuevas dinámicas sociales e incluso provocar el surgimiento de a los recursos, a los servicios, al juego político nacional y a las redes globales y supranacionales, sean económicas, sociales o políticas. El debate suscitado por la ley 70 es portador de nuevos esquemas

Paris-Sud XI, Université de


A New Transcriptional Repressor of the Pseudomonas aeruginosa Quorum Sensing Receptor Gene lasR  

PubMed Central

Pseudomonas aeruginosa pathogenic potential is controlled via multiple regulatory pathways, including three quorum sensing (QS) systems. LasR is a key QS signal receptor since it acts as a global transcriptional regulator required for optimal expression of main virulence factors. P. aeruginosa modulates the QS response by integrating this cell density-dependent circuit to environmental and metabolic cues. Hence, QS also controls the adaptation to challenging environmental niches, such as infection sites. However, little is known about the molecular mechanisms connecting QS and other signalling pathways. In this work, DNA-affinity chromatography was used to identify new lasR transcriptional regulators. This approach led to the identification and functional characterization of the TetR-like transcriptional repressor PA3699. This protein was purified and shown to directly bind to the lasR promoter region in vitro. The induction of PA3699 expression in P. aeruginosa PAO1 cultures repressed lasR promoter activity and the production of LasR-dependent virulence factors, such as elastase, pyocyanin, and proteases. These findings suggest a role for PA3699 in P. aeruginosa pathogenicity. P. aeruginosa genome encodes at least 38 TetR-family proteins, and PA3699 is the eighth member of this group functionally characterized so far and the first one shown to bind the lasR promoter in vitro. PMID:23861975

Longo, Francesca; Rampioni, Giordano; Bond, Roslen; Imperi, Francesco; Fimia, Gian Maria; Visca, Paolo; Zennaro, Elisabetta; Leoni, Livia



Global position analysis of the Pseudomonas aeruginosa quorum-sensing transcription factor LasR  

PubMed Central

Summary In Pseudomonas aeruginosa quorum sensing (QS), the transcriptional regulator LasR controls the expression of more than 300 genes. Several of these genes are activated indirectly via a second, subordinate QS regulator, RhlR. Conserved sequence elements upstream of individual other genes have been shown to bind LasR in vitro. To comprehensively identify all regions that are bound by LasR in vivo, we employed chromatin immunoprecipitation in conjunction with microarray analysis. We identified 35 putative promoter regions that direct the expression of up to 74 genes. In vitro DNA binding studies allowed us to distinguish between cooperative and non-cooperative LasR binding sites, and allowed us to build consensus sequences according to the mode of binding. Five promoter regions were not previously recognized as QS-controlled. Two of the associated transcript units encode proteins involved in the cold-shock response and in Psl exopolysaccharide synthesis, respectively. The LasR regulon includes seven genes encoding transcriptional regulators, while secreted factors and secretion machinery are the most overrepresented functional categories overall. This supports the notion that the core function of LasR is to coordinate the production of extracellular factors, although many of its effects on global gene expression are likely mediated indirectly by regulatory genes under its control. PMID:19682264

Gilbert, Kerrigan B.; Kim, Tae Hoon; Gupta, Rashmi; Greenberg, E. P.; Schuster, Martin



Lsb1 Is a Negative Regulator of Las17 Dependent Actin Polymerization Involved in Endocytosis  

PubMed Central

The spatial and temporal regulation of actin polymerization is crucial for various cellular processes. Members of the WiskottAldrich syndrome protein (WASP) family activate the Arp2/3-complex leading to actin polymerization. The yeast Saccharomyces cerevisiae contains only one WASP homolog, Las17, that requires additional factors for its regulation. Lsb1 and Lsb2/Pin3 are two yeast homologous proteins bearing an SH3 domain that were identified as Las17-binding proteins. Lsb2/Pin3 that promotes prion induction was suggested to link this prion formation to the actin cytoskeleton. However, the cellular role of Lsb1 and the molecular function of both Lsb1 and Lsb2 remain unknown. In this study, we show that Lsb1 and/or Lsb2 full-length proteins inhibit Las17-mediated actin polymerization in vitro, Lsb2 being a less potent inhibitor of Las17 activity compared to Lsb1. Addition of Lsb1 or Lsb2 to the corresponding full-length Lsb1/2 further inhibits Las17 activity. Lsb1 and Lsb2 form homo- and hetero-oligomeric complexes suggesting that these two proteins could regulate Las17 activity via dimerization or cooperative binding. In vivo, overexpressed Lsb1 and Lsb2 proteins cluster Las17-CFP in few cytoplasmic punctate structures that are also positive for other Arp2/3-dependent actin polymerization effectors like Sla1 or Abp1. But, only Lsb1 overexpression blocks the internalization step of receptor-mediated endocytosis. This shows a specific function of Lsb1 in endocytosis. PMID:23577202

Spiess, Matthias; de Craene, Johan-Owen; Michelot, Alphe; Rinaldi, Bruno; Huber, Aline; Drubin, David G.



Identification of methyl triclosan and halogenated analogues in male common carp (Cyprinus carpio) from Las Vegas Bay and semipermeable membrane devices from Las Vegas Wash, Nevada  

USGS Publications Warehouse

Methyl triclosan and four halogenated analogues have been identified in extracts of individual whole-body male carp (Cyprinus carpio) tissue that were collected from Las Vegas Bay, Nevada, and Semipermeable Membrane Devices (SPMD) that were deployed in Las Vegas Wash, Nevada. Methyl triclosan is believed to be the microbially methylated product of the antibacterial agent triclosan (2, 4, 4'-trichloro-4-hydroxydiphenyl ether, Chemical Abstract Service Registry Number 3380-34-5, Irgasan DP300). The presence of methyl triclosan and four halogenated analogues was confirmed in SPMD extracts by comparing low- and high-resolution mass spectral data and Kovats retention indices of methyl triclosan with commercially obtained triclosan that was derivatized to the methyl ether with ethereal diazomethane. The four halogenated analogues of methyl triclosan detected in both whole-body tissue and SPMD extracts were tentatively identified by high resolution mass spectrometry. Methyl triclosan was detected in all 29 male common carp from Las Vegas Bay with a mean concentration of 596????g kg- 1 wet weight (ww) which is more than an order of magnitude higher than previously reported concentrations in the literature. The halogenated analogs were detected less frequently (21%-76%) and at much lower concentrations (< 51????g kg- 1 ww). None of these compounds were detected in common carp from a Lake Mead reference site in Overton Arm, Nevada.

Leiker, T.J.; Abney, S.R.; Goodbred, S.L.; Rosen, M.R.



A reinterpretation of the Pleistocene human and faunal association at Las Buitreras Cave, Santa Cruz, Argentina  

NASA Astrophysics Data System (ADS)

The faunal assemblage recovered from Layers VIII-VII at Las Buitreras Cave has been considered as associated with human artifacts. On that basis, the previous analysis had concluded that human hunters had exploited ground sloths at the end of the Pleistocene. A reanalysis of the bones as well as the rest of the evidence suggests that there is no basis for that conclusion. On the contrary, it is suggested here that the lower layers at Las Buitreras are the result of the use of the cave as a den by ground sloths.

Borrero, Luis A.; Martin, Fabiana M.



After 58 years, an icon on the Las Vegas Strip closes  

NSDL National Science Digital Library

Las Vegas' Sahara Hotel and Casino closing after more than 58 years Vegas History Nevada: The Boomtown Years Tripping: Implosions Neon Museum that glitters is not gold, and when it comes to the glittering lights of the Vegas Strip, nothing is permanent. This weekend, the Sahara hotel saw its last guests leave as it ended its 58-year run on the Strip. The hotel was the brainchild of one Milton Prell, a former jewelry salesman who ran a bingo parlor in Montana. In 1952, he opened the Sahara, which he envisioned as a "jewel of the desert". The Sahara was the sixth hotel on the Strip, and with its fantastical Congo Room supper club and Casbar Lounge, it was a flourishing part of the "ring-a-ding-ding" 1950s and 1960s scene in Las Vegas. Characters who were part of the Strip's history included legendary entertainers Ray Bolger, Donald O'Connor, and Louis Prime, who performed there for years with his wife, Keely Smith. While plans for the site are in flux, it is hoped that some of the Sahara's iconic neon signs will end up in the nearby Neon Museum.The first link will take visitors to a nice article from this Saturday's Las Vegas Sun about the closing of the Sahara. The second link leads to piece from CNN's blog which also talks about the recent closing of this famed Strip stalwart. The third link will whisk users away to a terrific site from the Las Vegas Sun which chronicles the highs and lows of the Strip's history. Moving on, the fourth link leads to a nice digital collection from the University of Nevada, Las Vegas which documents the boom years of Southern Nevada through images, documents, and other archival items. The fifth link leads to a rather raucous and fun archive of Strip hotel implosions captured for posterity. Finally, the last link leads to the homepage of The Neon Museum in Las Vegas, which celebrates neon culture in all of its glory.

Grinnell, Max



Bioconcentration of the anionic surfactant linear alkylbenzene sulfonate (LAS) in the marine shrimp Palaemonetes varians: a radiotracer study.  


Uptake and depuration kinetics of dissolved [(14)C]C??-6-linear alkylbenzene sulfonate (LAS) were determined in the shrimp Palaemonetes varians using environmentally relevant exposure concentration. The shrimp concentrated LAS from seawater with a mean BCF value of 120 L kg(-1) after a 7-day exposure. Uptake biokinetics were best described by a saturation model, with an estimated BCFss, of 159 34 L kg(-1), reached after 11.5 days. Shrimp weight influenced significantly BCF value with smaller individuals presenting higher affinity to LAS. To the light of a whole body autoradiography, major accumulation of LAS occurred in the cephalothorax circulatory system (gills, heart, hepatopancreas) and ocular peduncle, but not in the flesh, limiting potential transfer to human consumers. LAS depuration rate constant value of the shrimp was 1.18 0.08 d(-1) leading to less than 1% of remaining LAS in its tissues after 8 days of depuration. PMID:25016418

Renaud, Florent; Warnau, Michel; Oberhnsli, Franois; Teyssi, Jean-Louis; Temara, Ali; Rouleau, Claude; Metian, Marc



Olimpiadas de Ciencias Las Olimpiadas de Ciencias son unas competiciones de carcter intelectual dirigidas al alumnado de 1 y 2 de  

E-print Network

Olimpiadas de Ciencias Las Olimpiadas de Ciencias son unas competiciones de carácter intelectual, e internacional. Sus objetivos son: Estimular el estudio de las ciencias entre los/las jóvenes y relación entre los centros de educación secundaria y la Universidad. La Facultad de Ciencias organiza las

Escolano, Francisco


Estudio sobre las dosis de radiacin y los riesgos de cncer causados por la prueba atmica Trinity realizada en 1945

El NCI tiene planeado realizar entrevistas en profundidad para determinar cul era la alimentacin caracterstica de las poblaciones indgenas americanas, hispanas (latinas) y chicanas que vivan en New Mexico a mediados de 1940 y utilizar informacin fcilmente disponible sobre la alimentacin y el estilo de vida de las poblaciones blancas. Estas entrevistas representan un paso importante para hacer estimaciones de las dosis de radiacin generadas por la prueba Trinity.



E-print Network


Escolano, Francisco


HAZTE SOCIO Si eres usuario habitual de las instalaciones deportivas, el Servicio de Deportes te recomienda  

E-print Network

HAZTE SOCIO Si eres usuario habitual de las instalaciones deportivas, el Servicio de Deportes te permite el acceso a la piscina, en horario de baño libre. No incluye la práctica de otros deportes. Estas: a través de Campus Virtual (Otros servicios (alumnado y PAS) Utilidades (PDI) >> Deportes >> Oficina

Escolano, Francisco


En el ao 1991se creaba el Insti-tuto Universitario del Agua y las  

E-print Network

en el tratamiento de aguas residuales industriales, experien- cias de reutilización de aguas resiEn el año 1991se creaba el Insti- tuto Universitario del Agua y las Ciencias otra denominación, se imparte el máster Gestión Sostenible y Tec- nología del Agua, adaptado al Es

Escolano, Francisco


El VIH y las ramificaciones para la seguridad alimentaria y la salud infantil en comunidades afectadas  

Microsoft Academic Search

ExtractoLos primeros casos de sndrome de inmunodeficiencia adquirida (SIDA), causada por el virus de la inmunodeficiencia humana (VIH), se identificaron en 1981. Actualmente se estima en 39 millones las personas infectadas en todo el mundo por el virus. Aunque el 64% de estos individuos viven actualmente en la pobreza de frica subsahariana, la pandemia se est propagando en estos momentos

Noel W. Solomons; Gwen Ellen ODonnell




EPA Science Inventory

The publication, in two volumes, contains the text of all papers presented at EPA's fifth flue gas desulfurization (FGD) symposium, March 5-8, 1979, at Las Vegas, Nevada. A partial listing of papers in Volume 2 includes the following: Basin Electric's involvement with dry flue ga...


Ms para ellas - Sugerencias para cerrar la brecha entre gneros en las regiones en desarrollo  

Microsoft Academic Search

Segn el pensamiento convencional, la salud y la educacin son factores esenciales para el desarrollo econmico y social: permiten mejorar la distribucin del ingreso y la productividad, y adems, los ms beneficiados son los pobres. Sin embargo, en muchas regiones del mundo no todos los miembros de la sociedad reciben estos servicios equitativamente. En muchos casos las mujeres estn excluidas

Alessandro Magnoli




EPA Science Inventory

The hydrogeologic study of the shallow ground-water zone in Las Vegas Valley, Nevada determined the sources and extent of ground-water contamination to develop management alternatives and minimize adverse effects. An extensive, computerized data base utilizing water analyses, wel...



EPA Science Inventory

The publication, in two volumes, contains the text of all papers presented at EPA's fifth flue gas desulfurization (FGD) symposium, March 5-8, 1979, at Las Vegas, Nevada. A partial listing of titles includes the following: Overview of control technology--the bridge between energy...


Geophysical constraints on the location and geometry of the Las Vegas Shear Zone, Nevada  

USGS Publications Warehouse

We model the basin configuration beneath Las Vegas Valley, Nevada, on the basis of gravity, drillhole, and seismic reflection data. We locate and characterize the various strands of the Las Vegas Valley Shear Zone (LVVSZ) by variations in basin thickness beneath the valley. The pre-Tertiary bedrock surface is complex, with subbasins buried beneath the flat alluvial surface of the valley. We suggest that these basins are formed from transtensional strain. Subbasins elongated N70??W and N50??W are interpreted as strike-slip basins. The deepest subbasin is 5 km west of Frenchman Mountain and strikes N40??E. This basin probably formed by combined movement on nonparallel strands of the LVVZ and an earlier episode of normal faulting. The basin thickness map constrains the minimum depth of the inferred detachment fault beneath Las Vegas Valley to at least 4 km. Seismic reflection data do not image a detachment fault in the upper 10 km beneath Las Vegas Valley. Our results also illustrate the utility of gravity in determining basinal structures and providing a three-dimensional perspective in areas with limited seismic reflection control.

Langenheim, V.E.; Grow, J.A.; Jachens, R.C.; Dixon, G.L.; Miller, J.J.



On quantum and probabilistic communication: Las Vegas and one-way protocols  

E-print Network

and restrictions lie in quantum mechanical computing, several classical restricted models of computation have been this model also in the quantum case (intro- duction to (classical) communication complexity can be foundOn quantum and probabilistic communication: Las Vegas and one-way protocols #3; Hartmut Klauck

Klauck, Hartmut


El Control Legal del Gasto en el mbito de las Haciendas Locales  

Microsoft Academic Search

El control del gasto es una de las principales preocupaciones de la gestin pblica, en cualquier nivel de Administracin, ya sea Central, Autonmica o Local. En la gestin en general, es vital la informacin: su cuanta ( la suficiente), la rapidez con la que se obtiene ( oportunidad), quin la necesita (caractersticas de los demandantes), cmo se presenta ( los

Aurelia Valio Castro; Laura de Pablos Escobar



Comenditic and pantelleritic ash-flow tuffs from Volcan Las Navajas, Nayarit, Mexico  

Microsoft Academic Search

Two distinctive ash-flow tuffs occur around the base of Volcan Las Navajas, a Pleistocene trachyte - peralkaline rhyolite center located in the northwestern segment of the Mexican Volcanic belt. The lower ash-flow unit is locally up to 65 m thick, is lithic rich and contains pumice blocks of comenditic rhyolite. The unit is not extensively exposed, and thus its areal

S. A. Nelson; J. A. Hebre




EPA Science Inventory

Perchlorate ion (CIO4-) has been identified in samples of dormant salt cedar (Tamarix ramosissima) growing in the Las vegas Wash. Perchlorate is an oxidenat, but its reduction is kineticaly hindered. CXoncern over thyrpoid effects caused the Environmental Protection Agency (EPA...


Perchlorate uptake by salt cedar ( Tamarix ramosissima) in the Las Vegas Wash riparian ecosystem  

Microsoft Academic Search

Perchlorate ion (ClO4?) has been identified in samples of dormant salt cedar (Tamarix ramosissima) growing in the Las Vegas Wash. Perchlorate is an oxidant, but its reduction is kinetically hindered. Concern over thyroid effects caused the Environmental Protection Agency (EPA) to add perchlorate to the drinking water Contaminant Candidate List (CCL). Beginning in 2001, utilities will look for perchlorate under

Edward T. Urbansky; Matthew L. Magnuson; Catherine A. Kelty; Stephanie K. Brown



Historia de las matemticas Depto de Matemticas, FCEyN, UBA  

E-print Network

;Primeros conocimientos Aparece el lenguaje escrito La falta de agua obliga a registrar los períodos de lluvias o inundaciones (almanaques, calendario) Primeras obras de ingeniería: diques y canales Nacen las agua Primeros imperios JPP-HdM ­ p. 11/2 #12;Primeras civilizaciones 3500 aC: Sumerios (en Irak) 3100 a

Pinasco, Juan Pablo


77 FR 77090 - Notice of Public Meeting, Las Cruces District Resource Advisory Council Meeting, New Mexico  

Federal Register 2010, 2011, 2012, 2013, 2014

...Federal Land Policy and Management Act and the Federal...the Bureau of Land Management's (BLM) Las Cruces...Mexico Farm & Ranch Heritage Museum, 4100 Dripping...associated with public land management in New Mexico. Planned...Mexico Farm & Ranch Heritage Museum, 4100...



Validation of Las Vegas Basin Response to the 1992 Little Skull Mtn. Earthquake as Predicted by  

E-print Network

1 Validation of Las Vegas Basin Response to the 1992 Little Skull Mtn. Earthquake Valley (LVV), we modeled the ML 5.6 -5.8 Little Skull Mountain (LSM) earthquake. The NSZ process employs Little Skull Mountain (LSM) earthquake. We selected the LSM event because at ML 5.6 -5


Twelve Years of Sociocultural Action in the Las Villas Area. Chapter 2.  

ERIC Educational Resources Information Center

This chapter reports on the activities of the Rural Continuing Education Centre (CREPA), a nongovernmental organization run by volunteers from small agricultural villages in the Las Villas area of Salamanca, Spain. The organization was founded in 1983 with the goal of improving living conditions and community life for villagers through social

Gonzalez, Quintin Garcia


Un analisis econometrico del turismo hotelero y extra-hotelero en las regiones y provincias espaolas  

Microsoft Academic Search

Se presentan algunos modelos econometricos de las regiones espaolas para analizar la distribucion del turismo, hotelero y extrahotelero a nivel regional y provincial de Espaa en 1991-95. El enfoque resulta novedoso al incluir el estudio del turismo extra-hotelero que tiene en muchos casos gran importancia. Los modelos ponen de manifiesto la importancia de varios factores como el clima, en todos

M. Carmen Guisan; Neira I




PubMed Central

El objetivo del trabajo es conocer las disyuntivas entre los principios de beneficencia y autonoma, que se presentan en la relacin mdico-paciente, durante la teraputica del intento de suicidio. La investigacin se realiz en dos hospitales psiquitricos de la Ciudad de Mxico. La muestra incluy a tres sujetos con intento de suicidio, mayores de 18 aos, que eran atendidos en consulta externa a causa de una lesin autoinfligida en el ltimo ao, y a tres psiquiatras que trataban a estos pacientes. La informacin se obtuvo previo consentimiento informado en entrevistas individuales. Se llev a cabo un anlisis de discurso argumentado para encontrar los significados que los participantes otorgaron a los principios bioticos y las posibles disyuntivas entre stos. Las discordancias entre la beneficencia y la autonoma estuvieron relacionadas con el beneficio del tratamiento, el respeto por los valores y las creencias de los pacientes, entre otros. Este trabajo presenta consideraciones ticas relevantes en el escenario clnico, al ofrecer al psiquiatra un anlisis biotico que le permita actuar de acuerdo con la beneficencia y respetando la autonoma del paciente frente a casos de intento de suicidio y, de esta forma procurar una mejor atencin para ellos. PMID:20830214

Mondragn, Liliana; Monroy, Zuraya; Ito, Ma. Emily; Medina-Mora, Dra. Ma. Elena



La Gaceta de la RSME, Vol. 00 (0000), Num. 0, Pags. 114 1 Las Medallas Fields  

E-print Network

positiva en relatividad general, y a las ecuaciones de Monge­Amp`ere reales y complejas. Este es un justo dimensiones y a la teor´ia de la relatividad general. Es una analista geom´etrico (o ge´ometra analista) de topology and in general relativity theory. He is an analyst's geometer (or geometer's analyst

Enciso, Alberto


Integrated diatom-pollen based Holocene environmental reconstruction of lake Las Margaritas, eastern savannas of Colombia  

Microsoft Academic Search

A multiproxy analysis that includes diatoms, pollen, element geochemistry, carbon content analysis, and radiocarbon dates was carried out on a core from Las Margaritas (3023N, 73026W) in order to reconstruct environmental and climatic change. This lake is hydrologically closed and is located in the transitional area between the Amazonian rainforest and the savannas of the eastern part of Colombia. It

M. I. Velez; M. Wille; H. Hooghiemstral; S. Metcalfe



Cientficos que cuestionan los paradigmas dominantes: Algunas implicaciones para la enseanza de las ciencias  

Microsoft Academic Search

In this work I present the topic of the scientists that challenge dominant paradigms. This reality can help us to deepen in the nature of the science, at the same time that can have applications for science teaching. Palabras clave: Filosofa de la ciencia, paradigmas dominantes, cambio conceptual, resistencia al descubrimiento, enseanza de las ciencias.

Juan Miguel Campanario



Nuevas formas literarias para las ciencias sociales: el caso de la autoetnografa  

Microsoft Academic Search

Este es un trabajo sobre el momento de escribir en el proceso de la investigacin. Es decir sobre el poder de la escritura. La posmodernidad no ha pasado en vano por la psicologa social, ni por el resto de ciencias sociales. Ha aportado un debate crucial sobre las formas de expresin de la ciencia establecida y los efectos de poder

Joel Feliu i Samuel-Lajeunesse



Satisfaccin en el voluntariado: estructura interna y relacin con la permanencia en las organizaciones  

Microsoft Academic Search

La satisfaccin es un concepto considerado tericamente relevante por casi todos los estudios que han investigado los factores de los que depende la permanencia del voluntariado. Sin embargo, los resulta- dos empricos sobre el tipo de influencia que ejerce no son concluyentes, en parte, suponemos que de- bido a la gran diversidad en las formas de entender y medir el

Mara Luisa Vecina Jimnez; Fernando Chacn Fuertes; Manuel J. Sueiro Abad


Los pilares de las redes 4G: QoS, AAA y Movilidad  

Microsoft Academic Search

Introduccin An cuando no han aparecido de forma comercial las redes mviles de 3 generacin, que llegarn acompaando a la tecnologa UMTS, ya se vislumbra la prxima generacin, cuyas principales caractersticas podran resumirse en: ncleo IP, ubicuidad y servicios. En primer lugar se basan en un ncleo IP encargado de ofrecer el transporte en la red, sobre esta base se

Antonio Cuevas; Carlos Garca; Jos Ignacio Moreno; Ignacio Soto


Inmigrantes ucranianos en Espaa. Una aproximacin a las pautas de movilidad internacional  

Microsoft Academic Search

Desde principios de los aos noventa las pautas de movilidad internacional de los inmigrantes ucranianos en Europa Central y Occidental se caracterizan por su temporalidad, circularidad e irregularidad. Partiendo de este supuesto se examinan en este artculo los patrones de movilidad de los ucranianos inmigrados a Espaa. Como principales categoras de descripcin se utilizan los indicadores de temporalidad de desplazamiento,

Renta Hosnedlov; Mikolaj Stanek



Nuevos Procesos Sociales y Polticos en Amrica Latina: Las redes neozapatistas  

E-print Network

Nuevos Procesos Sociales y Políticos en América Latina: Las redes neozapatistas Xochitl Leyva Solano Leyva Solano, Xochitl. 2008. "Nuevos procesos sociales y políticos en América, Democracia Radical y Movimientos Sociales. Lima, Programa Democracia y Transformación Globa, pp

Geffner, Hector



E-print Network

; Redes sociales; Nuevas tecnologías #12;1. Espacio iberoamericano y nuevas tecnologías, ¿oportunidad oLA CONSTRUCCI?N DE UN ESPACIO VIRTUAL IBEROAMERICANO: LAS REDES EN INTERNET Luis RODRÍGUEZ YUNTA redes iberoamericanas, formales e informales, en Internet: contenidos, recursos para la cooperación y

Boyer, Edmond



EPA Science Inventory

Estimates of quantity and geographic distribution of recharge to the shallow ground-water zone from water use return flows in Las Vegas Valley were made for the years 1973, 1965, 1958, 1950, and 1943 as part of a broader study on the impact of water and land use on ground-water q...


Conozca cules son las opciones de atencin del cncer en su comunidad

Este artculo hace una presentacin general de las funciones del programa de centros oncolgicos designados por el NCI y del programa de investigacin oncolgica comunitaria del NCI en Estados Unidos, los cuales son una fuente importante de atencin para pacientes con cncer.


Las representaciones fcticas y cognitivas del relato de entrevistas biogrficas : un anlisis reticular del discurso  

Microsoft Academic Search

Este artculo trata de identificar y relacionar las dimensiones fcticas y cognitivas de un relato biogrfico, entendido como una representacin narrativa. El entrevistado construye su narracin entreverando ambas dimensiones a lo largo del relato. Este artculo propone un mtodo de anlisis reticular del discurso como un procedimiento eficaz para poner de relieve y relacionar ambas dimensiones. A partir de teoras

Carlos Lozares Colina



Signal and Image Processing, SIP-2000, Las Vegas, USA, (c) IASTED SEARCHING FOR AURORA  

E-print Network

Signal and Image Processing, SIP-2000, Las Vegas, USA, (c) IASTED SEARCHING FOR AURORA MIKKO T. We demonstrate an automatical algorithm for searching aurora in auroral all-sky images. The algorithm that contain aurora and require further examination in the detection phase. The detection is based on shape

Syrjäsuo, Mikko



EPA Science Inventory

An objective methodology presented in a companion paper (Liu et al., 1986) for determining the optimum number and disposition of ambient air quality stations in a monitoring network for carbon monoxide is applied to the Las Vegas, Nevada, area. The methodology utilizes an air qua...



EPA Science Inventory

The vast influx of population began pouring into the Las Vegas Valley in the 1940's the hydrologic regime of the Valley has undergone significant change. This domestic irrigation of vegetation together with wastewater return flows has caused a perennial stream leaving the Valley ...


The Development of Child Subjectivity in "La lengua de las mariposas"  

ERIC Educational Resources Information Center

Jose Luis Cuerda's film "La lengua de las mariposas" is set in rural Galicia in the immediate lead-up to the outbreak of the Spanish Civil War. It portrays the tender relationship between a Republican schoolteacher, Don Gregorio, and a boy named Moncho. Upon the Nationalist capture of the town, the young Moncho hurls stones at his friend, but

Ryan, Lorraine




E-print Network

UNIVERSITYOF NEVADA, LAS VEGAS DIFFERENTIAL FEE PROPOSAL FOR UNLV'S SCHOOL OF NURSING Responseth year) students would be adversely affected by an increase in tuition. Nursing students recognize that local private schools charge at least 4 times the current UNLV tuition. They are willing to pay extra

Hemmers, Oliver


Trees Killed by the 2011 Las Conchas Fire in New Mexico  

USGS Multimedia Gallery

Extensive, contiguous mortality of pion pine, ponderosa pine, and Douglas-fir trees, killed in the first afternoon and evening of the 2011 Las Conchas Fire in the Jemez Mountains, New Mexico. Forest drought stress is highly correlated with mortality from poor growth, bark beetle outbreaks, a...


University of Nevada Las Vegas Student Wellness Center Agreement for Services  

E-print Network

University of Nevada Las Vegas Student Wellness Center Agreement for Services Student Health Center Wellness Center. I also understand that the health fee assessed as part of my registration fees does if the student health insurance plan denies any or all payments for services received at the Student Wellness

Hemmers, Oliver


mAJoR NeWSPAPeRS las Vegas Review-Journal  

E-print Network

Affiliate) 1500 Foremaster Ln. Las Vegas, NV 89116 (702) 642-3333 otHeR SeRViceS ADVERTISING no staff or capacity for advertising services. We do have the following in-house services telephone message system (No Charge) 3. Box Office window space for posters and flyers (No Charge) 4. E

Hemmers, Oliver


Isolation of the Autoinducer-Quenching Strain that Inhibits LasR in Pseudomonas aeruginosa  

PubMed Central

Quorum sensing (QS) has been recognized as a general phenomenon in microorganisms and plays an important role in many pathogenic bacteria. In this report, we used the Agrobacterium tumefaciens biosensor strain NT1 to rapidly screen for autoinducer-quenching inhibitors from bacteria. After initial screening 5389 isolates obtained from land and beach soil, 53 putative positive strains were identified. A confirmatory bioassay was carried out after concentrating the putative positive culture supernatant, and 22 strains were confirmed to have anti-LasR activity. Finally, we determined the strain JM2, which could completely inhibit biofilm formation of Pseudomonas aeruginosa PAO1, belonged to the genus Pseudomonas by analysis of 16S rDNA. Partially purified inhibitor factor(s) F5 derived from culture supernatants specifically inhibited LasR-controlled elastase and protease in wild type P. aeruginosa PAO1 by 68% and 73%, respectively, without significantly affecting growth; the rhl-controlled pyocyanin and rhamnolipids were inhibited by 54% and 52% in the presence of 100 ?g/mL of F5. The swarming motility and biofilm of PAO1 were also inhibited by F5. Real time RT-PCR on samples from 100 ?g/mL F5-treated P. aeruginosa showed downregulation of autoinducer synthase (LasRI and rhlI) and cognate receptor (lasR and rhlR) genes by 50%, 28%, 48%, and 29%, respectively. These results provide compelling evidence that the F5 inhibitor(s) interferes with the las system and significantly inhibits biofilm formation. PMID:24736783

Weng, Lixing; Zhang, Yuqian; Yang, Yuxiang; Wang, Lianhui



Proteja su almuerzo de los grmenes Lvese las manos con agua caliente y jabn antes de preparar el almuerzo.  

E-print Network

el almuerzo. · Limpie las áreas donde prepara alimentos, incluyendo la superficie de barras y mesas. · Mantenga los alimentos perecederos lejos de las zonas de temperatura peligrosa (40- 1400 F) hasta la hora del almuerzo. ¿Qué se conserva a temperatura ambiente? Alimentos como nueces y mantequilla de maní


Las partes interesadas en la gestin turstica de los parques naturales andaluces. Identi?cacin de interrelaciones e intereses  

Microsoft Academic Search

RESUMEN En la reciente literatura turstica existe una creciente atencin en el anlisis y la participacin de todas las partes interesadas en la plani?cacin, gestin y comercializacin de un destino turstico. Sobre la base de la Teora de las Partes Interesadas se han ido desarrollando un conjunto de planteamientos en esta lnea, que tambin resultan muy interesantes para el caso

Juan Ignacio Pulido Fernndez



Las reformas laborales en Espaa y su impacto real en el mercado de trabajo en el periodo 1985-2008  

Microsoft Academic Search

El documento analiza el contenido y la eficacia de cada una de las reformas que se han producido en el Estatuto de los Trabajadores, desde su aprobacin en 1980 hasta la actualidad y sus resultados en trminos reales. Se comprueba que ninguna de las reformas estudiadas ha logrado conseguir de manera concluyente los objetivos que se proponan, lo que debe

Sandalio Gomez; Ignacio Contreras; Lola Garcia




Microsoft Academic Search

RESUMEN: El posible deterioro de la calidad de las aguas subterrneas, causado por la aplicacin de lodos de depuradora a un suelo agrcola, es evaluado en trminos del incremento de la salinidad del agua de recarga y de su contenido en nutrientes. Para ello, se obtuvieron las curvas de lavado de cada elemento en estudio, a partir de un ensayo

M. J. Polo Gmez; R. Ordez Fernndez; J. V. Girldez Cerveral


Las Tecnologas de la Informacin y Comunicacin en la Docencia Universitaria Presencial. Aplicacin en Distintas Titulaciones y reas de Conocimiento  

Microsoft Academic Search

El objetivo fundamental del presente estudio es analizar el impacto de la aplicacin de las Tecnologas de la Informacin y Comunicacin (TICs) como elemento didctico de autoaprendizaje y facilitador motivacional en la docencia universitaria presencial. El trabajo emprico realizado consiste en la aplicacin de distintas herramientas acadmicas en ocho asignaturas de seis titulaciones de las siguientes reas de conocimiento: Ciencias

Mara Carmen Fernndez Aguirre; Juan Ignacio Modroo Herrn; Teodoro Palomares Casado



Concepciones sobre la enseanza y difusin del patrimonio en las instituciones educativas y los centros de interpretacin. Estudio descriptivo  

Microsoft Academic Search

Desde una perspectiva interdisciplinar (didctica de las ciencias sociales y didctica de las ciencias experimentales), se realiza un anlisis de concepciones de una muestra estadstica de profesores y gestores en relacin con el patrimonio, su enseanza y difusin. Como instrumento para la obtencin de la informacin se ha diseado un cuestionario, cuyo contenido se ha determinado en funcin de un

Jess Estepa Gimnez; Rosa Ma. vila Ruiz; Roco Ruiz Fernndez



Revista Electrnica de Enseanza de las Ciencias Vol. 3 N 3 (2004) Cientficos que cuestionan los paradigmas  

E-print Network

Revista Electrónica de Enseñanza de las Ciencias Vol. 3 Nº 3 (2004) Científicos que cuestionan los paradigmas dominantes: Algunas implicaciones para la enseñanza de las ciencias Juan Miguel Campanario cuestionan paradigmas dominantes, como un medio para profundizar en el estudio de la naturaleza de la ciencia

Campanario, Juan Miguel


165enseanza de las ciencias, 2010, 28(2), 165174 Pensamiento intuitivo en Qumica: suPosiciones  

E-print Network

165enseñanza de las ciencias, 2010, 28(2), 165­174 Pensamiento intuitivo en Química: su ilustrar en qué medida el razonamiento de los estudiantes de ciencias, en particular de los alumnos de razonamiento intuitivos. Desde esta perspectiva, cualquier agenda en la educación de las ciencias que se

Talanquer, Vicente A.


Revista Electrnica de Enseanza de las Ciencias Vol. 3 N 1 (2004) Presentaciones aparentemente arbitrarias de algunos  

E-print Network

Revista Electrónica de Enseñanza de las Ciencias Vol. 3 Nº 1 (2004) Presentaciones aparentemente niveles. Palabras clave: Metacognición, enseñanza de las ciencias, libros de texto, conocimientos previos abordamos un aspecto poco estudiado de los manuales escolares de ciencias: la aparente arbitrariedad con que

Campanario, Juan Miguel


TextMess 2.0: Las Tecnologas del Lenguaje Humano ante los nuevos retos de la comunicacin digital  

E-print Network

contextos (espacial, temporal y emocional) analizando las diferentes dimensiones de uso (multilingualidad digital en el que se combinan múltiples lenguas (multilingualidad), formatos de representación, temporal y emocional) analizando las diferentes dimensiones de uso (multilingualidad, multimodalidad y

Escolano, Francisco


Effect of linear alkylbenzene sulphonate (LAS) on non-specific defence mechanisms in rainbow trout (Oncorhynchus mykiss).  


Linear alkylbenzene sulphonate (LAS) is among the most widely disseminated xenobiotics to enter waste streams and the aquatic environment. In the present investigation, we present a novel approach to evaluate in toxicity of LAS. The effects of sublethal levels (0.2 and 0.4 mg/l) of LAS on non-specific immune system, phagocytosis, respiratory burst and lyzosyme activity, and specific growth rate in the rainbow trout, Oncorhynchus mykiss, during a 54-day exposure were examined by a static bioassay test procedure. The phagocytic activity of leukocytes from fish exposed to 0.4 mg/l LAS statistically decreased compared with the control fish values. No significant reductions were observed in the extra-intracellular respiratory burst and lysozyme activities after exposure to LAS at any of the concentrations tested. The final body weight in fish groups exposed to the LAS were found to be significantly lower than in the control. The specific growth rate results also supported the result above. The results of this study showed sublethal doses (0.2-0.4 mg/l) of LAS caused to statistically insignificant suppression of non-specific immune system mechanisms excluding phagocytosis in fish at laboratory conditions. These doses of LAS may produce potential synergism on immune system when presented with other environmental pollutants. PMID:15642641

Bakirel, Tlay; Kele?, Oya; Karata?, Sheyla; Ozcan, Mukaddes; Trkmen, Glhan; Candan, Akin




E-print Network

funds online and at the pub. During the event, guests will enjoy live music and other festivities. Last Ireland, Rí Rá Las Vegas is located inside The Shoppes at Mandalay Place. The authentic Irish pub features a multitude of artifacts that were carefully restored in Wicklow, Ireland and shipped to their new home in Las

Ahmad, Sajjad


Candida albicans-produced farnesol stimulates Pseudomonas quinolone signal production in LasR-defective Pseudomonas aeruginosa strains  

PubMed Central

Candida albicans has been previously shown to stimulate the production of Pseudomonas aeruginosa phenazine toxins in dual-species colony biofilms. Here, we report that P. aeruginosa lasR mutants, which lack the master quorum sensing system regulator, regain the ability to produce quorum-sensing-regulated phenazines when cultured with C. albicans. Farnesol, a signalling molecule produced by C. albicans, was sufficient to stimulate phenazine production in LasR? laboratory strains and clinical isolates. P. aeruginosa ?lasR mutants are defective in production of the Pseudomonas quinolone signal (PQS) due to their inability to properly induce pqsH, which encodes the enzyme necessary for the last step in PQS biosynthesis. We show that expression of pqsH in a ?lasR strain was sufficient to restore PQS production, and that farnesol restored pqsH expression in ?lasR mutants. The farnesol-mediated increase in pqsH required RhlR, a transcriptional regulator downstream of LasR, and farnesol led to higher levels of N-butyryl-homoserine lactone, the small molecule activator of RhlR. Farnesol promotes the production of reactive oxygen species (ROS) in a variety of species. Because the antioxidant N-acetylcysteine suppressed farnesol-induced RhlR activity in LasR? strains, and hydrogen peroxide was sufficient to restore PQS production in las mutants, we propose that ROS are responsible for the activation of downstream portions of this quorum sensing pathway. LasR mutants frequently arise in the lungs of patients chronically infected with P. aeruginosa. The finding that C. albicans, farnesol or ROS stimulate virulence factor production in lasR strains provides new insight into the virulence potential of these strains. PMID:20656785

Cugini, Carla; Morales, Diana K.; Hogan, Deborah A.



Evolution of a Humid Tropical Landscape in Northcentral Costa Rica as Deduced from Geomorphic and Pedogenic Evidence  

E-print Network

I. SOIL PROFILE DESCRIPTIONS . 185 APPENDIX II. PROCEDURES FOR LABORATORY ANALYSES ... 231 APPENDIX III. RESULTS OF LABORATORY ANALYSES .... 2l4 APPENDIX IV. AGUAS ZARCAS AND QUESADA TOPOGRAPHIC SHEETS 259 vi LIST OF TABLES Table Page 1... and the Finca Las Americas 37 11. Major Landform Types in the Piedmont Province of Southern San Carlos , . . . . 41 12. Topographic Profiles Constructed from the Aguas Zarcas Topographic Sheet ........... 43 ix Figure Page 13 Landslide Topography along...

Wells, Anke Maria Neumann



Geologic Interpretation of the Las Vegas Valley Based on Industry Seismic Reflection Data  

NASA Astrophysics Data System (ADS)

Las Vegas Valley, NV is located in the southern Basin and Range Province where the basin was formed by the Las Vegas Valley Shear Zone as well as by several thrust and normal faulting events that occurred by Cenozoic time. The geology and tectonic setting in the Las Vegas region is poorly understood given the fact that many structures have been covered by the constant growth of the City. National studies of ground motion and amplification of seismic energy placed Nevada third in the list of states having the potential for loss of life and property due to earthquakes. The Las Vegas area has a high potential for strong ground shaking due its thick basin fill and associated amplification. Due to the amplification effects within the Valley, moderate nearby quakes or large distant quakes will produce a large amount of damage in the Valley. Las Vegas, though not known for its earthquakes, has numerous micro quakes and an active seismic history. In a study using HAZUS to predict damage associated with a M6.9 earthquake, the loss would be billions of dollars with thousands of lives lost. Long-term economic loss would be in the several billions of dollars. Recently, several normal faults, which have the potential to produce a M6.5 to 7.0 earthquake, were reclassified as active tectonic fault with Quaternary movement. As a result, there has been increased effort to understand the Las Vegas Valley and to assess its potential for seismic hazards. One such effort included acquiring industry reflection profiles that cross the Valley. In the 1980's, north/south and east/west trending reflection lines with intersecting tie points were placed between Frenchman Mountain to the East and Spring Mountains to produce seismic profiles using Vibroseis. The profiles, which are over 200 kilometers in length and extend down to 5 s in time or approximately 15 km depth, will provide a tie between the surface work that is currently being conducted and the crustal velocity models that are being calculated to produce a seismic hazard potential for the Las Vegas Valley. The quality of the Vibroseis data is very high. We have been able to locate the basin/bedrock contact as well as several faults that cut the sections. All of which have been mapped on the shot point map. Most of the faults appear to be normal faults listric in character that trend north-south paralleling the structure of the southern Basin and Range. Basin geometry and associated minor folding, which have been truncated by minor faulting, can be seen across the profiles. Some faults can be seen as tectonic in origin while others are merely subsidence faulting from basin settling. With this new data we will identify structures that could potentially focus energy in the sub-surface adding to our growing knowledge of the basin geometry. In addition, this data will be incorporated into the seismic hazard model that is being developed for the Las Vegas Valley and will provide very detailed geologic information that has not been previously available.

Hirsch, A.; Snelson, C. M.



Bifurcacin de las soluciones de vientos impulsados por radiacin en estrellas Be: formacin de lneas  

NASA Astrophysics Data System (ADS)

Se ha estudiado la topologa de la ecuacin hidrodinmica no-lineal que describe el perfil de velocidades de vientos impulsados por radiacin en estrellas tempranas. Al aplicar este modelo a estrellas Be se encuentra que existen dos tipos De soluciones: la estndar, que describe el viento polar, y una nueva, que describe un viento ms denso y lento y que explicara el disco que se encuentra alrededor de estos objetos. Existe una regin de transicin en donde ambas soluciones coexisten (bifurcacin}). Ambas soluciones satisfacen en esta regin las mismas condiciones de borde. Para estas dos soluciones se han obtenido los perfiles de lneas de hidrgeno del visible y del IR, resolviendo el transporte de radiacin en el ``comoving frame". Para la solucin estndar, se obtienen perfiles con componentes en emisin, mientras que para la nueva solucin se obtienen perfiles en absorcin. Se comparan cualitativamente los resultados con las observaciones.

Cur, M.; Rial, D.; Cidale, L.; Venero, R.


Eruption ages of Las Tres Vrgenes volcano (Baja California): A tale of two helium isotopes  

Microsoft Academic Search

La Virgen tephra is the product of the youngest and most voluminous explosive eruption of Las Tres Vrgenes volcano (Baja California). Combined UTh and (UTh)\\/He zircon dating allows accurate correction for uranium-series disequilibrium, and yields an eruption age for La Virgen tephra of 30.7?1.4+1.8ka (2?). No difference in eruption ages was found between samples from proximal and distal La Virgen

Axel K. Schmitt; Daniel F. Stockli; Samuel Niedermann; Oscar M. Lovera; Brian P. Hausback



Fish bioassays of linear alkylate sulfonates (LAS) and intermediate biodegradation products  

Microsoft Academic Search

Linear alkylate sulfonates (LAS) are relatively toxic to fish when tested under static conditions by standard bioassay techniques,\\u000a the median tolerance limit (TLm) being around 3 mg\\/liter and 0.6 mg\\/liter for the C12 and C14 homologs, respectively. However, these materials are so readily degraded by bacterial attack that bluegill fingerlings live\\u000a with no trouble in effluents from laboratory continuous flow

R. D. Swisher; J. T. Orourke; H. D. Tomllnson



Adems de las bases Juan Carlos I y Gabriel de Castilla, numerosos investigadores espaoles desarrollan su  

E-print Network

decenas de masas de agua líquida de diferen- tes tamaños y de un gran interés ecológico, algo poco campamento oscilan entre -50 C y +50 C, la humedad está constantemente entre el 85% y el 95%, y las lluvias actividad del campamento, mientras que el agua para beber se toma de un río cercano, primero se filtra y

Justel Eusebio, Ana


-1 Integrando al agua en las decisiones  

E-print Network

- 1 Integrando al agua en las decisiones Producción y Lluvia #12;- 3 Radiación, Temperatura (10d) y fotoperíodo 5 10 15 D E F M A M mm/mes Pp Etp ... ¿Cuándo siembro? Rendimiento potencial Oferta vs Demanda ¿Cuanta agua

Nacional de San Luis, Universidad


La funcin de la imaginacin en las Coronas de Rodolfo Usigli  

E-print Network

SPRING 1977 37 La funcin de la imaginacin en las Coronas de Rodolfo Usigli ROBERTO R. RODRGUEZ El teatro no es historia. Una pieza histrica, si es buena, puede ser una leccin de historia. Rodolfo Usigli La perspectiva de Usigli en la... presentado. De esta manera cada uno se convierte en un observador que analiza los hechos acontecidos como cualquier historiador. El uso del milagro, desde el punto de vista tcnico, se emplea como el 44 LATIN AMERICAN THEATRE REVIEW elemento unificador de...

Rodriguez, Roberto R.



Differential vulnerability to motor deficits in second replicate HAS and LAS rats following neonatal alcohol exposure  

Microsoft Academic Search

Children exposed prenatally to alcohol suffer from a variety of behavioral alterations. However, variation exists in the pattern and severity of these alcohol-related neurodevelopmental disorders. We examined the influence of alcohol sensitivity in the etiology of fetal alcohol effects by studying rat lines selectively bred for extremes in alcohol-induced sleep time: high-alcohol-sensitive (HAS) and low-alcohol-sensitive (LAS) rats. Using subjects from

J. D. Thomas; B. D. Leany; E. P. Riley



Comenditic and pantelleritic ash-flow tuffs from Volcan Las Navajas, Nayarit, Mexico  

SciTech Connect

Two distinctive ash-flow tuffs occur around the base of Volcan Las Navajas, a Pleistocene trachyte - peralkaline rhyolite center located in the northwestern segment of the Mexican Volcanic belt. The lower ash-flow unit is locally up to 65 m thick, is lithic rich and contains pumice blocks of comenditic rhyolite. The unit is not extensively exposed, and thus its areal extent and volume cannot be determined. Its chemical characteristics and stratigraphic relationship to other products erupted from Las Navajas suggest that it is related to the formation of the older of the two calderas which occur on Las Navajas. Unconformably overlying this unwelded ash-flow is a pantelleritic airfall pumice unit which is locally welded. This airfall unit is conformably overlain by a welded as-flow tuff that contains fiamme of pantelleritic composition (72 %SiO/sub 2/, 8% FeO*, 900 ppm Zr, agpaitic index of 1.7) as well as pumice blocks that show evidence of various degrees of mixing between pantellerite and trachyte. This suggests eruption from a chemically zoned magma chamber. This unit is locally up to 20 m thick, although its top has been removed by erosion. It is found on all sides of Las Navajas except on the south where it may be covered by Volcan Sanganguey, a Pleistocene to Recent calc-alkaline volcano. The welded ash-flow has been dated by K - Ar at 0.2+/-0.1 m.y. Stratigraphically and chemically this ash-flow appears to be related to the formation of younger of the two calderas.

Nelson, S.A.; Hebre, J.A.



Airborne and laboratory remote sensing applications of the CSIRO CO2 laser spectrometer MIRACO2LAS  

Microsoft Academic Search

The mid-infrared airborne CO2 laser spectrometer (MIRACO2LAS) was developed by CSIRO Division of Exploration and Mining to investigate the potential role of high spectral resolution thermal infrared (TIR) remote sensing for improved remote sensing of minerals, especially those silicate minerals that do not have diagnostic features at shorter wavelengths, such as quartz, feldspars, pyroxenes and garnets. Other objectives include testing

L. B. Whitbourn; T. J. Cudahy; J. F. Huntington; P. M. Connor; P. Mason; R. N. Phillips; Peter Hausknecht



The Impact of Urban Development on the Water Quality in the Las Vegas Watershed  

NASA Astrophysics Data System (ADS)

Las Vegas, one of the fastest growing cities in the nation, must have its water strictly monitored for quality as well as degree of pollution. Samples at various sites were collected to analyze the current pollution status of our water bodies (in both residential and urban settings) in the Las Vegas watershed. These gathered samples (sediment and water) were collected and analyzed for measuring total phosphorus, total organic carbon, trace metal contents, i.e., selenium, arsenic, mercury and lead, as well as pathogens, i.e., E-coli and total coliform counts. The concentrations of various pollutions will be compared among different sites as well as natural local sites (due to the natural occurrence of a few trace metals and normal levels of other measurements) and analyzed for spatial distribution for source identification and for elucidating the cause and consequence. Preliminary analyses of the results indicate that nonpoint source pollutions (golf courses, construction sites, etc.) have larger impacts than point source pollutions such as wastewater treatment effluents. This study will help understand and evaluate the degradation of the water quality caused by the increase of human actions in recent years in Las Vegas.

Yu, A.; Simmons, C.; Acharya, K.



Quantifying multi-temporal urban development characteristics in Las Vegas from Landsat and ASTER data  

USGS Publications Warehouse

Urban development has expanded rapidly in Las Vegas, Nevada of the United States, over the last fifty years. A major environmental change associated with this urbanization trend is the transformation of the landscape from natural cover types to increasingly anthropogenic impervious surface. This research utilizes remote sensing data from both the Landsat and Terra-Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instruments in conjunction with digital orthophotography to estimate urban extent and its temporal changes by determining sub-pixel impervious surfaces. Percent impervious surface area has shown encouraging agreement with urban land extent and development density. Results indicate that total urban land-use increases approximately 110 percent from 1984 to 2002. Most of the increases are associated with medium-to high-density urban development. Places having significant increases in impervious surfaces are in the northwestern and southeastern parts of Las Vegas. Most high-density urban development, however, appears in central Las Vegas. Impervious surface conditions for 2002 measured from Landsat and ASTER satellite data are compared in terms of their accuracy. ?? 2008 American Society for Photogrammetry and Remote Sensing.

Xian, G.; Crane, M.; McMahon, C.



Nondegraded metabolites arising from the biodegradation of commercial linear alkylbenzenesulfonate (LAS) surfactants in a laboratory trickling filter  

SciTech Connect

The degradation of a commercial linear alkylbenzenesulfonate (LAS) surfactant was examined kinetically in a trickling filter, which allowed simultaneous chemical determinations in the aqueous phase (e.g., DOC) and in the gas phase (CO{sub 2}). About 60% of the carbon applied as LAS was released as CO{sub 2}, whereas 15% remained as DOC in the eluate of acclimated trickling filters. The biomass was analyzed after the experiment, and it was found to have sorbed about 23 mg LAS/g of dry biomass; this represented about 3% of the LAS applied to the filter. The LAS and the eluates from the trickling filter were further analyzed by HPLC and UV and IR spectrometry. The residual carbon from acclimated filters contained no LAS-like material (HPLC), which was obviously subject to quantitative biotransformation. The residual material comprised > 50 polar metabolites, some of whose UV spectra differed from that of LAS, and most or all of which were sulfonated. These nondegraded metabolites included carboxylated dialkyltetralinesulfonates and sulfophenylcarboxylates. These residual materials showed no detectable toxicity to algae or Daphnia, and did not significantly lower the surface tension of water.

Koelbener, P.; Baumann, U. [Swiss Federal Inst. for Materials Testing and Research, St. Gallen (Switzerland); Leisinger, T. [ETH-Zentrum, Zuerich (Switzerland). Inst. of Microbiology; Cook, A.M. [ETH-Zentrum, Zuerich (Switzerland). Inst. of Microbiology]|[Univ. of Konstanz (Germany). Faculty of Biology



Growth phenotypes of Pseudomonas aeruginosa lasR mutants adapted to the airways of cystic fibrosis patients.  


The opportunistic pathogen Pseudomonas aeruginosa undergoes genetic change during chronic airway infection of cystic fibrosis (CF) patients. One common change is a mutation inactivating lasR, which encodes a transcriptional regulator that responds to a homoserine lactone signal to activate expression of acute virulence factors. Colonies of lasR mutants visibly accumulated the iridescent intercellular signal 4-hydroxy-2-heptylquinoline. Using this colony phenotype, we identified P. aeruginosa lasR mutants that emerged in the airway of a CF patient early during chronic infection, and during growth in the laboratory on a rich medium. The lasR loss-of-function mutations in these strains conferred a growth advantage with particular carbon and nitrogen sources, including amino acids, in part due to increased expression of the catabolic pathway regulator CbrB. This growth phenotype could contribute to selection of lasR mutants both on rich medium and within the CF airway, supporting a key role for bacterial metabolic adaptation during chronic infection. Inactivation of lasR also resulted in increased beta-lactamase activity that increased tolerance to ceftazidime, a widely used beta-lactam antibiotic. Loss of LasR function may represent a marker of an early stage in chronic infection of the CF airway with clinical implications for antibiotic resistance and disease progression. PMID:17493132

D'Argenio, David A; Wu, Manhong; Hoffman, Lucas R; Kulasekara, Hemantha D; Dziel, Eric; Smith, Eric E; Nguyen, Hai; Ernst, Robert K; Larson Freeman, Theodore J; Spencer, David H; Brittnacher, Mitchell; Hayden, Hillary S; Selgrade, Sara; Klausen, Mikkel; Goodlett, David R; Burns, Jane L; Ramsey, Bonnie W; Miller, Samuel I



Distribution and origin of dissolved gases of groundwaters at Las Caadas aquifer, Tenerife, Canary Islands  

NASA Astrophysics Data System (ADS)

Volcanic aquifers commonly trap an important fraction of the main soluble components of fluids released from volcanic-hydrothermal system (CO2, SO2, H2S, HCl, HF, etc.). In particular, the interactions between volcanic gases and volcanic aquifers have been studied through hydrogeochemical parameters, as major and minor ions contents and dissolved gases in groundwaters. In the context of hydrogeochemical studies applied to active volcanic areas, studies of dissolved gases species in groundwater could be a useful tool to better understand the subsurface processes as gas-water-rock interaction or to strengthen the geochemical seismic-volcanic surveillance programs. In this work, we report the results of the geochemical characterization of dissolved gases (N2, O2, Ar, CO2, CH4, CO, H2, He, 222Rn, ?13CTDIC) in 96 groundwater samples from Las Caadas aquifer (around Teide volcano) between May and October, 2006. The main aims of this work are: (1) to determine the background level of magmatic gas input in the aquifer during quiescent periods, (2) to better define the origin of dissolved gases in Las Caadas aquifer, specially CO2, (3) to evaluate the gas-water-rock interaction processes occurring at depth, and (4) to delineate high permeable pathway of upward migration of volcanic-hydrothermal gases. In general, the dissolved gas phase in groundwaters of Las Caadas aquifer is relatively enriched in endogenous gases (CO2, He and H2) while it is relatively depleted in atmospheric gases (N2, O2 and Ar). N2-O2-CO2 triangular diagram shows that dissolved gases in most of analyzed groundwater are variable mixtures of CO2-rich fluids from the volcanic-hydrothermal system (as represent the Teide fumaroles) with dissolved air. The relatively high N2/O2 ratio in some groundwater compared to the air saturated water suggests an O2 consumption during gas-water-rock interactions occurring at depth. Spatial distribution maps show anomalous concentration of 222Rn CH4, H2 and CO2 dissolved in groundwater at the westernmost area of Las Caadas aquifer, which is in good spatial correlation with geophysical and geochemical anomalies related to 2004-2005 seismic-volcanic unrest at Tenerife Island. Determinations of ?13C values in the total dissolved inorganic carbon (TDIC) in groundwater in Las Caadas aquifer ranging from -5 to +5 ( vs PDB). This result was explained by isotopic fractionation of either volcanic-hydrothermal CO2 partially dissolved in groundwater or due to precipitation of CaCO3 and CO2 degassing related to silicate hydrolysis dissolving Ca2+.

Marrero, R.; Melian, G.; Padron, E.; Sortino, F.; Hernandez Perez, P. A.; Lopez, D. L.; Perez, N.



An Aerial Radiological Survey of Selected Areas of the City of North Las Vegas  

SciTech Connect

As part of the proficiency training for the Radiological Mapping mission of the Aerial Measuring System (AMS), a survey team from the Remote Sensing Laboratory-Nellis (RSL-Nellis) conducted an aerial radiological survey of selected areas of the city of North Las Vegas for the purpose of mapping natural radiation background and locating any man-made radioactive sources. Survey areas were selected in collaboration with the City Manager's office and included four separate areas: (1) Las Vegas Motor Speedway (10.6 square miles); (2) North Las Vegas Downtown Area (9.2 square miles); (3) I-15 Industrial Corridor (7.4 square miles); and (4) Future site of University of Nevada Las Vegas campus (17.4 square miles). The survey was conducted in three phases: Phase 1 on December 11-12, 2007 (Areas 1 and 2), Phase 2 on February 28, 2008 (Area 3), and Phase 3 on March 19, 2008 (Area 4). The total completed survey covered a total of 44.6 square miles. The flight lines (without the turns) over the surveyed areas are presented in Figures 1, 2, 3, and 4. A total of eight 2.5-hour-long flights were performed at an altitude of 150 ft above ground level (AGL) with 300 feet of flight-line spacing. Water line and test line flights were conducted over the Lake Mead and Government Wash areas to ensure quality control of the data. The data were collected by the AMS data acquisition system (REDAR V) using an array of twelve 2-inch x 4-inch x 16-inch sodium iodide (NaI) detectors flown on-board a twin-engine Bell 412 helicopter. Data, in the form of gamma energy spectra, were collected continually (every second) over the course of the survey and were geo-referenced using a differential Global Positioning System. Collection of spectral data allows the system to distinguish between ordinary fluctuations in natural background radiation levels and the signature produced by man-made radioisotopes. Spectral data can also be used to identify specific radioactive isotopes. As a courtesy service, with the approval of the U.S. Department of Energy, National Nuclear Security Administration, Nevada Site Office, RSL-Nellis is providing this summary to the office of the Mayor of the City of North Las Vegas along with the gross-count-based exposure rate and man-made count contour maps and GIS shape files in electronic format on a compact disk.

Piotr Wasiolek



Shear Velocity Structure Beneath the Las Vegas Valley, Nevada From Regional and Teleseismic Events  

NASA Astrophysics Data System (ADS)

The Las Vegas Valley (LVV), Nevada is located in the central Basin and Range province of western North America. The Valley sits atop a broad sedimentary basin and is susceptible to large earthquakes generated by local and regional faults. During ground motion events, the Las Vegas basin has been found to amplify seismic energy. In addition, the crustal and upper mantle structure of the Valley is poorly understood. Therefore, surface wave data have been used to create shear velocity profiles of the crust and upper mantle beneath LVV using regional and teleseismic events. This project is part of a larger collaborative study, which is characterizing the Las Vegas basin for test site readiness and seismic hazards. Although the frequency of large events is small, the risk associated with such an event is very high for the Valley. As a result, the Las Vegas Valley Broadband array (LVVBB) was deployed in late September 2002 by Lawrence Livermore National Laboratory and the University of Nevada Las Vegas. It consists of a mixture of twelve three-component broadband and short period seismometers deployed in a saw-tooth geometry oriented northeast-southwest across the northeastern and central LVV, above the area estimated to be the deepest portion of the basin. Data examined as part of this study include both regional and global earthquake events recorded within a five-month period on seven of the twelve stations. All seven broadband stations used a three-component Guralp CMG40T sensor with a 40 samples/second sampling rate. Group velocity dispersion curves from Rayleigh waves and Love waves were determined using a multiple filter technique. Rayleigh wave group velocities range from 2.7 to 3.5 km/s for periods from 10 to 30s. Love wave group velocities range from 3.1 to 4.0 km/s for periods from 10 to 100s. In addition, Rg and Lg were examined from local events. 1-D shear velocity profiles of the crust and upper mantle have been produced through inversion along regional source-receiver paths and two-station paths. Shear velocities at depths of 3-5 km have never been directly determined in the Valley; these values will be used to better understand the seismic hazards in the area as well as the tectonic development of southern Nevada in the Basin and Range province.

McEwan, D. J.; Snelson, C. M.; Tkalcic, H.; Rodgers, A.



Final Report for the Arroyo Las Positas Maintenance Impact Study, Lawrence Livermore National Laboratory  

SciTech Connect

In 2000, the Lawrence Livermore National Laboratory's (LLNL) Environmental Protection Department, in coordination with Plant Engineering (PE), began dredging sections of the Arroyo Las Positas (ALP) to alleviate concerns about flooding of sensitive facilities within the mainsite of Lawrence Livermore National Laboratory. In order to reduce potential impacts on the federally threatened California red-legged frog (Rana aurora draytonii), LLNL proposed to dredge sections of the ALP in a ''checkerboard pattern'', resulting in a mosaic of open water habitat and vegetated sections (Figure 1). The Arroyo Las Positas Management Plan (Plan) was coordinated with both state and federal agencies including the U.S. Fish and Wildlife Service (USFWS), California Department of Fish and Game (CDF&G), San Francisco Regional Water Quality Control Board (SFRWQCB), and the Army Corp of Engineers (ACOE). Water Discharge Requirements (WDRs) were issued for this project on December 30, 1999 (Order No. 99-086) by the SFRWQCB. Provision 19 of the WDRs outlined a five-year (2000 through 2004) Maintenance Impact Study (MIS) that LLNL began in coordination with dredging work that was conducted as part of the Arroyo Las Positas Management Plan. Provision 20 of these WDRs requires LLNL to submit a final report of the results of the Maintenance Impact Study for this project to the SFRWQCB. The purpose of this report is to present the results of the Maintenance Impact Study for Arroyo Las Positas and meet the requirements of Provision 20. A description of the annual monitoring included in this Maintenance Impact Study is included in the methods section of this report. Initially the Plan called for dredging the entire length of the Arroyo Las Positas (approximately 6,981 linear feet) over a 5-year period to minimize temporal impacts on the California red-legged frog. Dredging occurred in 2000 ({approx}1,300 ft.), 2001 ({approx}800 ft.), and 2002 ({approx}1,200 ft.), which constituted approximately 3,300 ft., or roughly half of the entire Plan (Figure 2). Logistical challenges and unanticipated cost influenced the decision to terminate the project prior to completion, and re-evaluate the long-term management goals for the ALP. No dredging was conducted in the final two years of the plan (2003 and 2004).

van Hattem, M; Paterson, L



Las Positas College Increase Female Students in Welding and Automotive Technology from 5% to 14%; Retention Increases to 94%  

NSDL National Science Digital Library

This brief case study highlights Las Positas College in Livermore, California, which took part in the CalWomen Tech project. The project involved each college participating in four core recruitment strategies. Outreach took form in the place of posters, flyers, brochures and a website. Las Positas used the slogan "Women in Technology RULE." As a result of these efforts, the college was able to increase recruitment and retention of female students. The lessons learned from Las Positas College would be useful for other community colleges and technical programs looking to improve in this area.



40 CFR 51.917 - What is the effective date of designation for the Las Vegas, NV, 8-hour ozone nonattainment area?  

Code of Federal Regulations, 2014 CFR

...the Las Vegas, NV, 8-hour ozone nonattainment area? 51.917...for Implementation of 8-hour Ozone National Ambient Air Quality Standard 51.917 What...the Las Vegas, NV, 8-hour ozone nonattainment area? The...



40 CFR 51.917 - What is the effective date of designation for the Las Vegas, NV, 8-hour ozone nonattainment area?  

Code of Federal Regulations, 2010 CFR

...the Las Vegas, NV, 8-hour ozone nonattainment area? 51.917...for Implementation of 8-hour Ozone National Ambient Air Quality Standard 51.917 What...the Las Vegas, NV, 8-hour ozone nonattainment area? The...



40 CFR 51.917 - What is the effective date of designation for the Las Vegas, NV, 8-hour ozone nonattainment area?  

Code of Federal Regulations, 2013 CFR

...the Las Vegas, NV, 8-hour ozone nonattainment area? 51.917...for Implementation of 8-hour Ozone National Ambient Air Quality Standard 51.917 What...the Las Vegas, NV, 8-hour ozone nonattainment area? The...



40 CFR 51.917 - What is the effective date of designation for the Las Vegas, NV, 8-hour ozone nonattainment area?  

Code of Federal Regulations, 2011 CFR

...the Las Vegas, NV, 8-hour ozone nonattainment area? 51.917...for Implementation of 8-hour Ozone National Ambient Air Quality Standard 51.917 What...the Las Vegas, NV, 8-hour ozone nonattainment area? The...



40 CFR 51.917 - What is the effective date of designation for the Las Vegas, NV, 8-hour ozone nonattainment area?  

Code of Federal Regulations, 2012 CFR

...the Las Vegas, NV, 8-hour ozone nonattainment area? 51.917...for Implementation of 8-hour Ozone National Ambient Air Quality Standard 51.917 What...the Las Vegas, NV, 8-hour ozone nonattainment area? The...



El Informe Anual a la Nacin indica que las tasas de mortalidad por cncer continan declinando. Se observan tasas menores de cncer en las poblaciones latinas de los Estados Unidos.

Un informe nuevo de las principales organizaciones oncolgicas de la nacin informa que el riesgo de los estadounidenses de morir por cncer contina descendiendo, y que mantiene una tendencia que comenz a principios de los aos noventa. Preguntas y respuestas


Investigaccion-accion en la sala de clases sobre las creencias de la cultura de la ciencia de un grupo de estudiantes universitarios y su relacion reciproca con el aprendizaje de las ciencias biologicas  

NASA Astrophysics Data System (ADS)

La investigacion---accion que se llevo a cabo en la sala de clases tenia como punto de partida las creencias de la cultura de la ciencia de un grupo de estudiantes universitarios para luego examinar sus implicaciones en el proceso de aprendizaje de las Ciencias Biologicas. Que se supone que hagan las creencias en relacion con el aprendizaje? En que consiste incorporar este aspecto a la practica educativa universitaria? Utilizando el modelo de Kemmis y McTaggart (1987) la investigacion-accion se planteo como un proceso dinamico en cuatro momentos en espiral constituidos por la planificacion, la accion, la observacion y la reflexion. Cada una de las fases tuvo una intencion retrospectiva y prospectiva formando una espiral de autorreflexion del conocimiento y la accion. Se llevaron a cabo audio grabaciones en clases y analisis de documentos. Ademas, la profesora-investigadora hizo un portafolio para reflexionar sobre las creencias de la cultura de la ciencia que tienen los estudiantes y las creencias del aprendizaje que tiene la profesora y sobre como la comprension de estos elementos ayudo a mejorar su practica educativa a traves del tiempo. Los resultados obtenidos apuntan a que las creencias de la cultura de la ciencia que tiene el grupo de estudiantes son diversas. Ellos si creen que la ciencia tiene una cultura la cual describieron como: complicada y desconocida que evoluciona constantemente, que es un conjunto de metodos, que es altamente tecnologica, que resuelve problemas de salud, ayuda a interpretar la realidad del mundo que los rodea y su origen y que existen unas intersecciones entre la ciencia y el poder. Sobre las creencias del proceso de aprendizaje de la profesora-investigadora, estas senalan que el modelaje de actores, la vision de la academia que tiene ella asi como la participacion y negociacion entre todos los involucrados en el proceso educativo, son factores que inciden en el proceso de aprendizaje.

Cordova-Santiago, Lizzette Astrid


X seminario ACIUR -septiembre 2012 Universidad Javeriana_Mesa temtica 11 Cambios urbanos y evolucin de las desigualdades en el acceso a los recursos  

E-print Network

y sus recursos se plantea con mayor agudeza. La movilidad espacial es la condición de acceso a los (Dureau, 2002 : 378). La accesibilidad de los lugares corresponde a "[la] oferta de movilidad, [el alcanzar. Las desigualdades en las prácticas de movilidad reflejan, de hecho, las desigualdades sociales de

Boyer, Edmond


Un acercamiento a la aplicacin de la teora de las inteligencias mltiples (IM) en la clase de ingls como idioma extranjero en el contexto universitario cubano  

Microsoft Academic Search

El desarrollo de habilidades relacionadas con el discurso oral es una de las prioridades de los estudiantes de lenguas extranjeras. La mayora de las veces, la destreza en la comunicacin verbal es lo que mide el conocimiento del alumno de la lengua extranjera (LE) o la segunda lengua (L2) que se est aprendiendo. Hay muchas razones por lo que las

Daniel Cima de Mesa; Adrian Abreus Gonzlez




Microsoft Academic Search

RESUMEN: En el presente trabajo se aborda el estudio de las flechas en el Arte Levantino a partir de su contrastacin con los proyectiles en piedra tallada recuperados en los yacimientos meso- lticos y neolticos ms prximos a los abrigos pintados del ncleo de la Valltorta-Gasulla. El an- lisis de las diferentes modalidades de representacin y las distintas propuestas de



Inhibitor profiling of the Pseudomonas aeruginosa virulence factor LasB using N-alpha mercaptoamide template-based inhibitors  

Microsoft Academic Search

We report on the synthesis and biological evaluation of a focussed library of N-alpha mercaptoamide containing dipeptides as inhibitors of the zinc metallopeptidase Pseudomonas aeruginosa elastase (LasB, EC The aim of the study was to derive an inhibitor profile for LasB with regard to mapping the S1? binding site of the enzyme. Consequently, a focussed library of 160 members

George R. Cathcart; Brendan F. Gilmore; Brett Greer; Pat Harriott; Brian Walker



The Las Matras tonalitictrondhjemitic pluton, central Argentina: Grenvillian-age constraints, geochemical characteristics, and regional implications  

Microsoft Academic Search

The NS trending belt with Grenvillian-age rocks developed in central western Argentina represents the basement of an allochthonous terrane derived from Laurentia during the Early Paleozoic. The Las Matras pluton (3646?S, 6707?W) is located at the southern extension of this belt in the Las Matras Block. It consists of a low-Al tonalitic to trondhjemitic facies characteristic of an arc magmatism.

A.M. Sato; H. Tickyj; E. J. Llambiasa; K. Sato



Disminucin de las tasas de cncer de seno relacionada con la reduccin del uso de terapias de reemplazo hormonal

La tasa de los casos nuevos de cncer de seno en los Estados Unidos, la cual disminuy pronunciadamente en 2003, podra estar relacionada con una disminucin nacional del uso de terapias de reemplazo hormonal. Las tasas de incidencia de cncer de seno ajustadas a la edad en mujeres de los Estados Unidos bajaron un 6.7 por ciento en 2003. Durante este mismo perodo, las recetas mdicas para terapias de reemplazo hormonal bajaron rpidamente.


Seismic Data for Evaluation of Ground Motion Hazards in Las Vegas in Support of Test Site Readiness Ground Motion  

SciTech Connect

In this report we describe the data sets used to evaluate ground motion hazards in Las Vegas from nuclear tests at the Nevada Test Site. This analysis is presented in Rodgers et al. (2005, 2006) and includes 13 nuclear explosions recorded at the John Blume and Associates network, the Little Skull Mountain earthquake and a temporary deployment of broadband station in Las Vegas. The data are available in SAC format on CD-ROM as an appendix to this report.

Rodgers, A




E-print Network

TABLA DE ADAPTACIONES DE ASIGNATURAS SUPERADAS EN EL PROGRAMA SIMULTÁNEO DERECHO-ADE POR LAS ASIGNATURAS DEL GRADO DE DERECHO 1º CURSO DERECHO Créditos Tipo DERECHO-ADE Créditos Tipo Derecho Romano 6 FB Derecho Romano 6 FB Historia del Derecho Español y de las Instituciones 6 FB Historia del Derecho Español

Escolano, Francisco


Volcn Las Navajas, a Pliocene-Pleistocene trachyte\\/peralkaline rhyolite volcano in the northwestern Mexican volcanic belt  

Microsoft Academic Search

Volcn Las Navajas, a Pliocene-Pleistocene volcano located in the northwestern portion of the Mexican volcanic belt, erupted lavas ranging in composition from alkali basalt through peralkaline rhyolite, and is the only volcano in mainland Mexico known to have erupted pantellerites. Las Navajas is located near the northwestern end of the Tepic-Zacoalco rift and covers a 200-m-thick pile of alkaline basaltic

Stephen A Nelson; Joann Hegre



An Aerial Radiological Survey of the City of North Las Vegas (Downtown) and the Motor Speedway  

SciTech Connect

As part of the proficiency training for the Radiological Mapping mission of the Aerial Measuring System (AMS), a survey team from the Remote Sensing Laboratory-Nellis (RSL-Nellis) conducted an aerial radiological survey on December 11-12, 2007, with the purpose of mapping natural radiation background and locating any man-made radioactive sources. The survey covered 19.4 square miles (9.2 square miles over the downtown area of the City of North Las Vegas and 10.2 square miles over the Las Vegas Motor Speedway [LVMS]). The flight lines over the surveyed areas are presented in Figures 1 and 2. A total of four 2.5-hour-long flights were performed at an altitude of 150 ft above ground level (AGL) with 300 ft of flight line spacing. Water line and test line flights were conducted over the Lake Mead and Government Wash areas to ensure quality control of the data. The data were collected by the AMS data acquisition system-REDAR V using an array of twelve 2-inch x 4-inch x 16-inch sodium iodide (NaI) detectors flown on-board a twin-engine Bell 412 helicopter. Data in the form of gamma energy spectra were collected continually (every second) over the course of the survey and were geo-referenced using a differential Global Positioning System. Collection of spectral data allows the system to distinguish between ordinary fluctuations in natural background radiation levels and the signature produced by man-made radioisotopes sources. Spectral data can also be used to identify specific radioactive isotopes. As a courtesy service with the approval of the U.S. Department of Energy, National Nuclear Security Administration, Nevada Site Office, RSL-Nellis is providing this summary to the office of the Mayor of City of North Las Vegas and LVMS security along with the gross counts-based exposure rate and man-made counts maps.

Piotr Wasiolek



An Aerial Radiological Survey of the Las Vegas Strip and Adjacent Areas  

SciTech Connect

As proficiency training for the Radiological Mapping mission of the Aerial Measuring System (AMS), a survey team from the Remote Sensing LaboratoryNellis (RSL-Nellis) conducted an aerial radiological survey of the Las Vegas Strip and adjacent areas on December 29, 2008. This survey was one of the bi-annual surveys carried in support of the city of Las Vegas Police Department (LVPD) before significant events on the Las Vegas Strip: e.g., the annual New Years Eve and July Fourth celebrations. The AMS operation and appropriate law enforcement agencies selected this area as an appropriate urban location to exercise AMS capability for mapping environmental radiation and searching for man-made radioactive sources. The surveys covered approximately 11 square miles. Each survey required a 2.5-hour-long flight, performed at an altitude of 300 ft above ground level (AGL) at a line spacing of 600 ft. Water line and test line flights are conducted over the Lake Mead and Government Wash areas to determine the non-terrestrial background contributed by aircraft, radon, and cosmic activity, and to determine the altitude-dependent air mass correction. The data were collected by the AMS data acquisition system (REDAR V) using an array of twelve 2" x 4" x 16" sodium iodide (NaI) detectors flown on-board a twin-engine Bell 412 helicopter. Gamma energy spectral data were collected second-by-second over the survey area. This spectral data allows the system to distinguish between natural terrestrial background contributions and man-made radioisotope contributions. Spectral data can also be used to identify specific man-made radioactive isotopes. Data geo-locations were determined with a Real-Time Differential Global Positioning System (RDGPS).

Wasiolek, Piotr [NSTec



Mirando a travs de las mscaras: Una entrevista con Cristina Escofet  

E-print Network

otro lugar ni la literatura, ni la filosofa ni la vida ms que del gnero. Las mujeres somos filosofas. Ud. cree que existe un discurso femenino dramtico? No creo que haya un discurso femenino en oposicin a un discurso masculino. Hay una... desde dnde. Woody Allen es importante por su punto de mira - ms all de que si es hombre o mujer. Esto es el punto ms importante. El hecho de que una mujer escriba no quiere decir que su discurso tenga una mirada interesante. Se puede reproducir el...

Rathbun, Jennifer



Geodetic leveling data used to define historical height changes between Tonopah Junction and Las Vegas, Nevada  

SciTech Connect

This report documents geodetic leveling data for a survey route following US Highway 95 from Tonopah Junction, approximately 50 km west of Tonopah, Nevada, to Las Vegas, Nevada. The survey route passes immediately south of the potential site for a high-level nuclear waste repository at Yucca Mountain in southern Nevada. Comparisons among the results of the several repeated levelings along this survey route provide a partial basis for evaluating contemporary crustal deformation patterns in the vicinity of the Yucca Mountain site and the relation between any such deformation and geologic structures known or suspected to have been active during Quaternary time.

Gilmore, T.D.



Machines, medication, modulation: circuits of dependency and self-care in Las Vegas.  


The intensive entertainment infrastructure of Las Vegas is overlaid with a robust therapeutic network for those who become addicted to its technologies. Although the objectives of gambling machines and addiction therapeutics are seemingly at odds--the first work to encourage play, the second to stop it--both gear their interventions around a model of the self as a continuum of behavioral potentials that can be externally modulated. For compulsive gamblers implicated in this circuit of modulation, pharmaceutical drugs that have been prescribed to dampen cravings for machine play sometimes function as intensifiers of its effects. Caught in an intractable play between technologies of harm and technologies of care, recovering gambling addicts are challenged to assemble a technical array through which they can maintain balance; health itself, for these individuals, becomes a state of managed dependency. This essay explores the shifting terms and changing stakes of subjectivity and health in the contemporary United States by way of ethnographic research on compulsive gamblers who live and work in Las Vegas. The analysis draws on interviews with gamblers as well as on observations in local self-help groups, directed group therapy sessions, and chat rooms of Internet recovery Web sites. PMID:16944328

Schll, Natasha Dow



[Vectorial and congenital transmission of Trypanosoma cruzi in Las Lomitas, Formosa].  


Chagas disease, caused by Trypanosoma cruzi, is a major cause of morbidity and mortality in Latin America. The objective of this study was to describe the rate of infestation in four aboriginal communities in Las Lomitas (Great Chaco Region), Formosa, Argentina; the rate of infection in children residing in these communities, in blood donors and in pregnant women who received care at the Hospital Las Lomitas, as well as the rate of congenital infection in children born to women infected during the study period. The rate of infestation of 172 households evaluated in 2006 reached 32%. Prevalence of infection among 445 people was 17.5% and in children under 5 years old it was 8.6%. The rate of infection reached 18.6% in blood donors and 29.1% in pregnant women. The rate of infection among 47 children born to infected women, and living in residences under vectorial surveillance was 17.0%. These infections were considered as congenital. This study showed indexes compatible with active vectorial transmission at the beginning. After vectorial control with insecticides the infestation rate has been reduced to 3.3%. The local health system has introduced high impact procedures of primary and secondary prevention in order to prevent new cases and to treat infected people. PMID:19770096

Sosa-Estani, Sergio; Dri, Luca; Touris, Cecilia; Abalde, Sergio; Dell'arciprete, Ana; Braunstein, Jose



Phlebotominae spatial distribution asssociated with a focus of tegumentary leishmaniasis in Las Lomitas, Formosa, Argentina, 2002.  


Las Lomitas, Formosa, Argentina, reported 96 cases of tegumentary leishmaniasis during 2002. The urban transmission was suggested although previous outbreaks were related with floods of the Bermejo river (BR) 50 km from the village. Phlebotomine collections were performed during March 2002 to define the spatial distribution of risk, together with satellite imaginery. The phlebotomine/trap obtained was 1679.5 in the southern BR shore, 1.1 in the periruban-rural environment and 2.3 in the northern Pilcomayo river marshes. Lutzomyia neivai was the prevalent species (91.1%) among the 2393 phlebotomine captured, and it was only found in the BR traps. The other species were L. migonei (7.9%), L. cortelezzii (0.9%), and Brumptomyia guimaraesi (0.1%). The satellite images analysis indicates that the fishing spots at the BR were significantly overflowed during the transmission peak, consistent with fishermen recollections. This spatial restricted flood might concentrate vectors, reservoirs, and humans in high places. Therefore, both the spatial distribution of vectors and the sensor remoting data suggests that in Las Lomitas area the higher transmission risk it is still related with the gallery forest of the BR, despite of the urban residence of the cases. The surveillance and control implications of these results are discussed. PMID:16862326

Salomn, Oscar Daniel; Orellano, Pablo Wenceslao; Lamfri, Mario; Scavuzzo, Marcelo; Dri, Luca; Farace, Mara Isabel; Quintana, Daro Ozuna



Spatial distribution and contamination assessment of heavy metals in urban topsoils from Las Tunas City, Cuba.  


Concentrations of Cr, Co, Ni, Cu, Zn, Pb and Fe in the topsoils (0-10 cm) from Las Tunas city were measured by X-ray fluorescence analysis. The mean Cr, Co, Ni, Cu, Zn and Pb contents in the urban topsoil samples (97 30, 14 2, 35 36, 94 26, 199 87 and 42 29 mg kg? dry weight, respectively) were compared with mean concentrations for other cities around the world with similar population. Cr content in school grounds, parks and residential areas exceed in 20 % the average Cr background level. Highest content for Ni was determined in residential areas, for Zn in market gardens soils and as for Pb, the highest topsoil-background content ratios were observed for market gardens (2.7) and residential areas (2.3). Spatial distribution maps indicated the same behaviour for Cr-Co-Ni and Pb-Zn, respectively, whereas the spatial distribution of Cu differs from other heavy metals. On the other hand, the metal-to-iron normalisation, using (10-20 cm) bottom soil contents as background, showed that topsoils in Las Tunas city are severely enriched with lead and not enriched with the rest of the determined metals. The average values of integrated pollution index (IPI) indicated that soils are moderately contaminated by heavy metals (1.17 ? IPI(ave) ? 1.39), but enrichment index values shows that metal concentrations on the studied locations are not above the permissible levels for urban agriculture. PMID:23719778

Daz Rizo, O; Fonticiella Morell, D; Arado Lpez, J O; Borrell Muoz, J L; D'Alessandro Rodrguez, K; Lpez Pino, N



Influence of composition and temperature on hydrocarbon migration through Morrow fluvial reservoirs, Las Animas Arch, Colorado  

SciTech Connect

Precipitation of wax in pores may impair permeability and prohibit the flow of oil. Crude oil composition and temperature are the most important controlling factors. Oils are chemically complex, may contain up to 45 wax compounds and may vary significantly even in the same pool. High-wax oils are common in the Morrow of eastern Colorado. Narrow fluvial sandstones provide migration paths toward the Las Animas Arch from adjacent basins. Temperatures range from less than 110{degrees}F. on the top of the arch to 180{degrees}F at a structural position only 1,400 feet lower. A range of 30{degrees}F has been observed in individual pools. Wax has precipitated in the 120-140{degrees}F range, creating relative permeability barriers which cut across the sandstones. Wax barriers are impermeable to oil, but may be permeable to gas and water. They account for certain dry holes with high porosity, permeability and oil saturation (and low water saturation) in both core and electrical log analysis. They explain why some oil wells with impaired permeability are adjacent to structurally lower gas wells with good permeability. A network of wax barriers around the Las Animas Arch accounts for approximately 300 feet of variation in the structural position of a line separating oil from gas fields. Since the low temperature bands may be short and discontinuous, wax barriers are more effective in narrow fluvial reservoirs than in blanket reservoirs.

Bolyard, D.W. [Consultant, Denver, CO (United States)



On an LAS-integrated soft PLC system based on WorldFIP fieldbus.  


Communication efficiency is lowered and real-time performance is not good enough in discrete control based on traditional WorldFIP field intelligent nodes in case that the scale of control in field is large. A soft PLC system based on WorldFIP fieldbus was designed and implemented. Link Activity Scheduler (LAS) was integrated into the system and field intelligent I/O modules acted as networked basic nodes. Discrete control logic was implemented with the LAS-integrated soft PLC system. The proposed system was composed of configuration and supervisory sub-systems and running sub-systems. The configuration and supervisory sub-system was implemented with a personal computer or an industrial personal computer; running subsystems were designed and implemented based on embedded hardware and software systems. Communication and schedule in the running subsystem was implemented with an embedded sub-module; discrete control and system self-diagnosis were implemented with another embedded sub-module. Structure of the proposed system was presented. Methodology for the design of the sub-systems was expounded. Experiments were carried out to evaluate the performance of the proposed system both in discrete and process control by investigating the effect of network data transmission delay induced by the soft PLC in WorldFIP network and CPU workload on resulting control performances. The experimental observations indicated that the proposed system is practically applicable. PMID:21889140

Liang, Geng; Li, Zhijun; Li, Wen; Bai, Yan



Giant Magellan Telescope Site Testing and Characterization at Las Campanas Observatory  

NASA Astrophysics Data System (ADS)

Las Campanas Observatory has been designated as the location for the Giant Magellan Telescope (GMT). We report results obtained since the commencement, in 2005, of a systematic site testing campaign at LCO. Measurements of the turbulence profile of the free-atmosphere above LCO have been collected with a MASS/DIMM. We examine the contribution to the seeing arising from turbulence in the ground layer (defined here as below an altitude of 500 m) through the difference between the turbulence integrals in the full atmosphere (as measured by DIMM) and in the free atmosphere (as measured by MASS). In preparation to characterize the Giant Magellan Telescope site and guide the development of its adaptive optics system, two campaigns to systematically compare the turbulence profiles obtained independently with three different instruments were conducted at Las Campanas Observatory in September, 2007 and January 2008. Slope detection and ranging (SLODAR) was used on the 2.5-m duPont telescope. SLODAR measures the Cn2 profile as a function of altitude through observations of double stars. The separation of the observed double star sets the maximum altitude and height resolution. Ground layer (altitudes < 1 km) and free atmosphere turbulence profiles are compared with those obtained with a lunar scintillometer (LuSci) and a multi-aperture scintillation sensor (MASS), respectively. In addition, the total atmospheric seeing was measured by both SLODAR and a differential image motion monitor (DIMM).

Thomas-Osip, Joanna E.; Prieto, Gabriel E.



Estudio de la fisiologa del esfnter anal interno porcino y de la rata, y de la fisiopatologa de las alteraciones de la motilidad del esfnter anal interno en pacientes con fisura anal.  

E-print Network

??Las patologas anorectales benignas (fisura anal, incontinencia fecal, hemorroides) presentan una elevada prevalencia. De forma general, se desconoce la fisiopatologa de estas enfermedades en las (more)

Opazo Valds, lvaro Javier



Aerosol Optical Properties of Smoke from the Las Conchas Wildfire, Los Alamos, NM  

NASA Astrophysics Data System (ADS)

The Las Conchas wildfire in Northern New Mexico started on June, 26 2011 and spread rapidly, eventually burning an area of 634 km2 (245 mi2). Due to the close proximity to the fire, the Los Alamos National Laboratory (LANL) was shut down and the town evacuated for several days. Immediately after LANL reopened (7/6/2011) the Earth and Environmental Sciences Division (EES-14) attained unique measurements of the smoke by sampling the ambient air. Three Integrated Photoacoustic/Nephelometer Spectrometers (DMT Inc.) were set up to measure aerosol light absorption and scattering coefficients. A University of Northwest Switzerland thermodenuder was used to remove compounds that are volatile at temperatures up to 200C. The aerosol's optical properties were measured before and after denuding the sample at 405nm (blue), 532nm (green), 781nm (red), and for non-denuded particles also at 375nm (ultraviolet). The aerosol size distributions were measured after the denuder with a Laser Aerosol Spectrometer (LAS, TSI Inc.) and black carbon was measured with a Single Particle Soot Photometer (SP2, DMT Inc.). Additionally, ambient measurements of Total Particulate Matter (PM2.5 and PM10) were collected continuously at the LANL air monitoring stations. These measurements are used in conjunction with numerical simulations to determine the bulk optical properties of the aerosol. Aerosols in wildfire smoke are composed of organic and black carbon (soot) particles that are formed during wood combustion and pyrolysis. The optical properties of the smoke particles are complex and lead to large uncertainties in assessing the global climate. During the measurement period, the Las Conchas fire provided very high particle concentrations (up to 200 ?g/m3) that were exploited to investigate their optical properties. By heating the particles to temperatures ranging from 75 to 200C in the denuder, volatile organics were removed and the optical properties of the remaining particles were measured. Denuding of the aerosols, removed the outer organic coatings leaving behind the inner core of black carbon (soot) and any compounds that did not volatize completely. By simultaneously measuring the optical properties of the non-denuded as well as the denuded aerosol, we can study how the coatings affect the optical properties. The absorption coefficient measurements showed that coatings can cause an increase or decrease in absorption. The photoacoustic measurements were also combined with SP2 measurements to gain a mechanistic understanding of the effect of composition on the mass light absorption cross-sections of carbonaceous aerosols emitted by fires.

Gorkowski, K.; Dubey, M. K.; Flowers, B. A.; Aiken, A. C.; Klein, B. Z.; Mazzoleni, C.; Sharma, N.; China`, S.



The study of ozone variations in the Las Vegas metropolitan area using remote sensing information and ground observations  

USGS Publications Warehouse

Urban development in the Las Vegas Valley, Nevada, has grown rapidly in the past fifty years. Associated with this growth has been a change in landscape from natural cover types to developed urban land mixed with planned vegetation canopy throughout in the metropolitan area. Air quality in the Las Vegas Valley has been affected by increases in anthropogenic emissions and concentrations of carbon monoxide, ozone, and criteria pollutants of particular matter. Ozone concentration in the region is generally influenced by synoptic and mesoscale meteorological conditions, as well as regional transport of pollutants from the western side of Las Vegas. Local influences from ground-level nitrogen oxide emissions and vegetation canopy coverage also affect ozone concentration. Multi-year observational data collected by a network of local air monitoring stations in Clark County, Nevada, indicate that ozone maximums develop in May and June, while minimums exist primarily from November to February. Ozone concentrations are high on the west and northwest sides of the valley. A nighttime ozone reduction in the urban area characterizes the heterogeneous features of spatial distribution for average ozone levels in the Las Vegas urban area. The urban vegetation canopy has a locally positive effect by reducing ozone in urban areas. Decreased ozone levels associated with increased urban development density suggests that the highest ozone concentrations are associated with medium- to low-density urban development in Las Vegas.

Xian, G.; Crane, M.



Evaluation of municipal wastewater treatment plants with different technologies at Las Rozas, Madrid (Spain).  


Eight small-scale municipal wastewater treatment plants were evaluated over a period of 19 months in the suburb of Las Rozas in Madrid (Spain). Four plants used compact extended aeration, two used conventional activated sludge, two used conventional extended aeration, one used a rotary biodisc reactor and the other used a peat bed reactor. The best results were obtained from the plants that used conventional technologies and the biodisc. Conventional activated sludge and extended aeration had higher removal efficiencies for ammonia, TSS, COD and BOD(5) and produced good quality final effluents for final disposal in accordance with the discharge standard. Empirical equations that correlated the concentration of dissolved oxygen in the effluents with the efficiencies of TSS, ammonia, COD and BOD(5) removals for all plants evaluated were obtained. The performance of the plants using compact extended aeration was affected more than those using conventional technologies or rotary biodisc when the capacity exceeded that of its initial design. PMID:16580126

Colmenarejo, M F; Rubio, A; Snchez, E; Vicente, J; Garca, M G; Borja, R



Neighborhood Reputation and Resident Sentiment in the Wake of the Las Vegas Foreclosure Crisis  

PubMed Central

This study examines how two major components of a neighborhoods reputationperceived disorder and collective efficacyshape individuals sentiments toward their neighborhoods during the foreclosure crisis triggered by the Great Recession. Of central interest are whether neighborhood reputations are durable in the face of a crisis (neighborhood resiliency hypothesis) or whether neighborhood reputations wane during times of duress (foreclosure crisis hypothesis). Geo-coded individual-level data from the Las Vegas Metropolitan Area Social Survey merged with data on census tract foreclosure rates are used to address this question. The results provide qualified support for both perspectives. In support of the neighborhood resiliency hypothesis, collective efficacy is positively associated with how residents feel about the quality of their neighborhoods, and this relationship is unaltered by foreclosure rates. In support of the foreclosure crisis hypothesis, foreclosure rates mediate the effects of neighborhood disorder on resident sentiment. The implications of these findings for community resiliency are discussed.

Pais, Jeremy; Batson, Christie D.; Monnat, Shannon M.



Perchlorate uptake by salt cedar (Tamarix ramosissima) in the Las Vegas wash riparian ecosystem.  


Perchlorate ion (ClO4-) has been identified in samples of dormant salt cedar (Tamarix ramosissima) growing in the Las Vegas Wash. Perchlorate is an oxidant, but its reduction is kinetically hindered. Concern over thyroid effects caused the Environmental Protection Agency (EPA) to add perchlorate to the drinking water Contaminant Candidate List (CCL). Beginning in 2001, utilities will look for perchlorate under the Unregulated Contaminants Monitoring Rule (UCMR). In wood samples acquired from the same plant growing in a contaminated stream, perchlorate concentrations were found as follows: 5-6 microg g(-1) in dry twigs extending above the water and 300 microg g(-1) in stalks immersed in the stream. Perchlorate was leached from samples of wood, and the resulting solutions were analyzed by ion chromatography after clean-up. The identification was confirmed by electrospray ionization mass spectrometry after complexation of perchlorate with decyltrimethylammonium cation. Because salt cedar is regarded as an invasive species, there are large scale programs aimed at eliminating it. However, this work suggests that salt cedar might play a role in the ecological distribution of perchlorate as an environmental contaminant. Consequently, a thorough investigation of the fate and transport of perchlorate in tamarisks is required to assess the effects that eradication might have on perchlorate-tainted riparian ecosystems, such as the Las Vegas Wash. This is especially important since water from the wash enters Lake Mead and the Colorado River and has the potential to affect the potable water source of tens of millions of people as well as irrigation water used on a variety of crops, including much of the lettuce produced in the USA. PMID:10902849

Urbansky, E T; Magnuson, M L; Kelty, C A; Brown, S K



Fishery of the Green Jack Caranx caballus (Osteichytes: Carangidae) in Las Perlas Archipelago, Pacific Panama.  


Green Jacks, Caranx caballus, are distributed along the Eastern Pacific coast. In Panama, C. caballus was heavily fished around Las Perlas Archipelago to sustain local markets until 2007, when the archipelago was declared a marine protected area. This first study in Panama, analyzed a sample of 4 990 individuals from Las Perlas, obtained monthly from June 2005 to June 2006, from landings at the central fish market. Average total length was 36.1 +/- 6.4cm and optimum length 38.9cm. Approximately 68% of fish lengths were within +/-10% of the optimal length but only six (15%) were considered mega-spawners. The von Bertalanffy parameters describe a long-lived and fast growing species, while mortality rates revealed that C. caballus is under high fishing pressure. Standard length at which half of the population is mature was 38.8cm, and the size at which individuals matured massively, 33cm. Only 10-13% of the fish were immature. C. caballus reproduces two to three times per year, with peaks in December, April, and probably September, and recruits to the population at least twice per year. Catch per unit effort (CPUE) was best predicted by minimum annual values of the Multivariate ENSO/LNSO Index (MEI) (R2=0.54). Results show that C. caballus in Pacific Panama is overfished. We recommend the raising of the minimum capture/landing size of this species in order to increase the proportion of mega-spawners in the population and guarantee the sustainability of this resource. PMID:23025097

Mair, James M; Cipriani, Roberto; Guzman, Hector M; Usan, David



A design for a new catalog manager and associated file management for the Land Analysis System (LAS)  

NASA Technical Reports Server (NTRS)

Due to the larger number of different types of files used in an image processing system, a mechanism for file management beyond the bounds of typical operating systems is necessary. The Transportable Applications Executive (TAE) Catalog Manager was written to meet this need. Land Analysis System (LAS) users at the EROS Data Center (EDC) encountered some problems in using the TAE catalog manager, including catalog corruption, networking difficulties, and lack of a reliable tape storage and retrieval capability. These problems, coupled with the complexity of the TAE catalog manager, led to the decision to design a new file management system for LAS, tailored to the needs of the EDC user community. This design effort, which addressed catalog management, label services, associated data management, and enhancements to LAS applications, is described. The new file management design will provide many benefits including improved system integration, increased flexibility, enhanced reliability, enhanced portability, improved performance, and improved maintainability.

Greenhagen, Cheryl



Paleoslope, sea-level and climate controls on Upper Miocene platform evolution, Las Negras area, southeastern Spain  

USGS Publications Warehouse

Carbonate platforms in the Las Negras area evolved from onlapping ramps to fringing reef complexes later draped by cyclic shallow marine strata. Although sea-level history and paleoclimate had an effect on platform evolution, substrate topography played a dominant role. The strata are divided into five depositional sequences of Tortonian and Messinian age. The model of platform evolution provided by the Las Negras area exposures likely has applications for other Miocene carbonate complexes in the Mediterranean and could apply to other carbonate complexes in the rock record.

Franseen, E.K.; Goldstein, R.H.



Informe Anual a la Nacin sobre el Estado del Cncer 1975-2002 con una seccin especial sobre las tendencias de tratamiento: preguntas y respuestas

Las organizaciones oncolgicas principales de la nacin informan que el riesgo de los estadounidenses de morir de cncer sigue disminuyendo y que las tasas de casos nuevos de cncer permanecen estables. El Informe Anual a la Nacin sobre el Estado del Cncer, de 1975 a 2002, seala que las tasas de mortalidad de cncer que se observaron para todos los cnceres combinados disminuyeron 1,1 por ciento por ao de 1993 a 2002.


Taller de Ciencia para Jvenes para alumnos de nivel bachillerato San Cristbal de las Casas, Chiapas, 25-30 julio, 2011  

E-print Network

Taller de Ciencia para Jóvenes para alumnos de nivel bachillerato San Cristóbal de las Casas, Chiapas, 25-30 julio, 2011 CONVOCATORIA El "Taller de Ciencia para Jóvenes" en San Cristóbal de las Casas atraídos a las ciencias naturales y tienen intención de estudiar una carrera científica. El programa del

Bor, Gil


Fundacin General de la UIB (FuGUIB) La Fundacin General de la Universidad de las Illes Balears (FuGUIB) es una institucin privada,  

E-print Network

de 51 personas equivalentes a tiempo completo, 61% mujeres. La FuGUIB cerró el ejercicio económico el curso 2012-13 han sido las siguientes: renovación del mobiliario en las zonas comunes y las habitaciones, reposición del suelo de los pasillos y zonas comunes, cambio del grupo de presión para el agua

Oro, Daniel


Magnetotelluric study of the Las Caadas caldera (Tenerife, Canary Islands): structural and hydrogeological implications  

NASA Astrophysics Data System (ADS)

The Las Caadas caldera in Tenerife (Canary Islands) is a well-exposed caldera depression in which the active Teide-Pico Viejo complex stands. In addition to its volcanological interest, the Las Caadas caldera also holds the main groundwater reservoir of Tenerife. An audiomagnetotelluric and magnetotelluric survey was carried out in order to image the interior of the caldera depression. The field campaign consisted of 33 audiomagnetotelluric sites in the period range from 0.001 to 0.3 s and 11 magnetotelluric sites from 0.004 to 200 s. A detailed mapping of the electrical conductivity of the subsurface was obtained. For the long periods a three-dimensional modelling of the island - including the bathymetry - was carried out to study the effect of the ocean. This effect starts to be important at periods longer than 10 s. Accordingly, the sites were arranged into six profiles and a two-dimensional joint inversion of all data until 10 s was performed for each profile. The geometry of the high conductive zones found indicates that the caldera includes two closed depressions in the western (Ucanca) and central (Guajara) sectors, whereas in the eastern sector (Diego Hernndez) the top of the main conductive zone shows a gentle inclination towards the northeast (La Orotava valley). A narrow and marked high conductive anomaly, probably caused by the presence of highly fractured rocks and fossil hydrothermal alteration along a fracture zone, runs parallel and close to the present caldera wall, suggesting the position of the structural border of the caldera. The results indicate that there are two main aquifer zones separated by the Roques de Garc?a spur, coinciding with the western and central depressions. The eastern depression could be hydrologically disconnected from the central depression by another structural limit not visible at the surface. The saturation zones would have a thickness of more than 700 m starting at a few hundred metres below the present caldera floor. The data are consistent with a multiple vertical collapse origin for the caldera depression rather than a sector collapse origin.

Pous, Jaume; Heise, Wiebke; Schnegg, Pierre-Andr; Muoz, Gerard; Mart, Joan; Soriano, Carles



La efectividad de las redes de proteccin social: El rol de los sistemas integrados de informacin social en Mexico  

Microsoft Academic Search

Este trabajo forma parte de una serie de estudios realizados en el marco del proyecto La efectividad de las redes de proteccin social: el rol de los sistemas integrados de informacin social. Los estudios de caso fueron realizados en el perodo 2007-2008. El enfoque privilegiado en la elaboracin de este estudio es ms prctico que terico y ms gerencial que

Rogelio Gomez Hermosillo



, 20120259, published 4 March 20133712013Phil. Trans. R. Soc. A Daniel de las Heras and Matthias Schmidt  

E-print Network

, 20120259, published 4 March 20133712013Phil. Trans. R. Soc. A Daniel de las Heras and Matthias Schmidt polymer mixtures-sphere and platelet -Bulk fluid phase behaviour of colloidal platelet References cite this article - sign up go to:Phil. Trans. R

Schmidt, Matthias


78 FR 32644 - Las Vegas Wash Hydro LLC; Notice of Preliminary Permit Application Accepted for Filing and...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Las Vegas via two 84-inch-diameter penstocks for a distance of 10,208 feet...proposes to tie into the existing penstocks and construct a new powerhouse...of the two existing 84- inch diameter penstocks would be [[Page...




Microsoft Academic Search

2 RESUMEN Se estudia e ilustra la morfologa del polen de las familias Acanthaceae, Vitaceae y Violaceae pertenecientes a la flora del Valle de Mxico; la primera est representada por: Acanthus mollis L., Anisacanthus quadrifidus (Vahl) Standley, Dicliptera peduncularis Nees, Dyschoriste decumbens (Gray) O. Ktze., D. microphylla (Cav.) O. Ktze., Justicia furcata Jacq., Pseuderanthemum praecox (Benth.) Leonard, Ruellia bourgaei Hemsl.,




Microsoft Academic Search

A lo largo de casi todo el siglo XX, en Estados Unidos prevaleci la idea de que los in- migrantes con bajos niveles de capacitacin, lgicamente, ocuparan los peldaos ms bajos de la escala ocupacional y salarial, pero que, dadas las oportunidades exis- tentes en el pas, sus hijos tendran muchas posibilidades para incorporarse a los estratos medios. A principios

Elaine Levine



E-print Network

EL IMPACTO DEL CONFLICTO POLÍTICO SOBRE LAS ORGANIZACIONES DE LA SOCIEDAD CIVIL EN VENEZUELA: EL Universidad Central de Venezuela RESUMEN: En los años recientes, la pérdida de legitimidad, conflicto político, Venezuela #12;INTRODUCCI?N En este trabajo intentamos analizar algunos de los impactos

Paris-Sud XI, Université de


222Gac Sanit 2002;16(3):222-9 Objetivo: Describir la distribucin de las puntuaciones de los  

E-print Network

222Gac Sanit 2002;16(3):222-9 ORIGINALES Resumen Objetivo: Describir la distribución de las companies according to the personal and occupational characteristics of the workers. Methods: Cross-sectional study of a sample of 890 workers in four companies who participated in this study voluntarily

Gil, Ana Arribas


Evaluacin de seguridad de los alimentos Las preguntas siguientes son acerca del programa de hoy. Marque su respuesta.  

E-print Network

COMA BIEN Evaluación de seguridad de los alimentos Las preguntas siguientes son acerca del programa los alimentos. 1 2 3 4 5 1 2 3 4 5 Utilizo un termómetro para verificar si alimentos se han cocinados


Ambient air monitoring during the 2011 Las Conchas wildland fire near Los Alamos, U.S.A.  

SciTech Connect

Air monitoring data collected during the Las Conchas fire near the Los Alamos National Laboratory during 2011 are presented. Data included are for selected radionuclides and selected metals found in particulate matter. None of these analytes were seen at levels which exceeded any state or federal standards.

Green, Andrew A. [Los Alamos National Laboratory; Schlemann, Shea A. [Los Alamos Technical Associates; Young, Daniel L. [Los Alamos National Laboratory



El Vicerrectorado de Relaciones Internacionales presenta las convocatorias de Movilidad Internacional del curso 2012/2013 para PAS,  

E-print Network

El Vicerrectorado de Relaciones Internacionales presenta las convocatorias de Movilidad apuesta estratégica que fomente la movilidad internacional de la comunidad universitaria, el movilidad internacional previstas para el próximo curso 2012/2013. Personal UA PDI.- Convocatoria Erasmus

Escolano, Francisco


La efectividad de las redes de proteccin social: El rol de los sistemas integrados de informacin social en Brasil  

Microsoft Academic Search

Este trabajo forma parte de una serie de estudios realizados en el marco del proyecto La efectividad de las redes de proteccin social: El rol de los sistemas integrados de informacin social. Los estudios de caso fueron realizados en el perodo 2007-08. Se agradecen los comentarios de Amlia Cohn, Lcia Maria Modesto Pereira y Paulo de Martino Jannuzzi. El texto

Leticia Bartholo; Ricardo Rodrigues Dutra



SEGUNDA SEMANA DE LA CIENCIA EN San Cristobal de las Casas, 1-7 julio del 2007  

E-print Network

SEGUNDA SEMANA DE LA CIENCIA EN CHIAPAS San Cristobal de las Casas, 1-7 julio del 2007 CONVOCATORIA tecnológica El objetivo de la "semana de la ciencia" es acercar a los participantes al mundo de la. Bajar la solicitud de la página internet y enviarla por

Bor, Gil


Acritarchs of Las Ventanas Formation (Ediacaran, Uruguay): Implications for the timing of coeval rifting and glacial events in western Gondwana  

Microsoft Academic Search

Acritarchs and other organic-walled microfossils occurring in siltstones of the Las Ventanas Formation (Quebrada de Viera and El Perdido members) are systematically described and illustrated. The assemblage includes the following species: Leiosphaeridia tenuissima, Leiosphaeridia minutissima, Lophosphaeridium sp., Soldadophycus bossii, Soldadophycus major, Soldadophycus sp. and Vendotaenia antiqua. The microflora is characterized by low diversity (six species), dominance of L. tenuissima, absence

Claudio Gaucher; Gonzalo Blanco; Leticia Chiglino; Daniel Poir; Gerard J. B. Germs



A Catalog of Photometry for Las Campanas Redshift Survey Galaxies on the Sloan Digital Sky Survey System  

SciTech Connect

We present high-quality photometry in the five Sloan Digital Sky Survey filters, u', g', r', i', and z', for 2195 galaxies with spectroscopic redshifts measured by the Las Campanas Redshift Survey. In addition, a polynomial photometric redshift estimator is derived, with an uncertainty of 0.035 out to z = 0.25. (c) 2000 The American Astronomical Society.

Sowards-Emmerd, David; Smith, J. Allyn; McKay, Timothy A.; Sheldon, Erin; Tucker, Douglas L.; Castander, Francisco J.




Microsoft Academic Search

RESUMEN Es la intencin de esta comunicacin reflexionar y visualizar la importancia individual, grupal y comunitaria que tienen las organizaciones de mujeres en la lucha contra la exclusin social y en el fortalecimiento del Estado de bienestar. Su mera existencia cuestiona profundamente la lgica que articula esta sociedad patriarcal, porque expresa la presencia y reivindicaciones de sectores y colectivos sociales



Female Adolescent Subjectivities in Las Vegas: Poststructural Thoughts on the Intersections of Gender, Sexuality, Consumer Logic and Curriculum  

ERIC Educational Resources Information Center

In this article, data collected from an ethnographic study of adolescent girls growing up in the city of Las Vegas in the US is used to further our understanding of the role of mediated sex and consumer culture and in relationship to emerging adolescent female identities. Girls in this study articulated a clear sense of their abilities to make

Dentith, Audrey M.



Boln. Asoc. esp. Ent., 28 (3-4): 89-123, 2004 Las Ceratina Latreille, 1802 ibricas del Museo  

E-print Network

Boln. Asoc. esp. Ent., 28 (3-4): 89-123, 2004 Las Ceratina Latreille, 1802 ibéricas del Museo not been possible to confirm the presence #12;Boln. Asoc. esp. Ent., 28 (3-4): 89-123, 2004 F. JAVIER ORTIZ resultaron ser incorrectas (incluso de espe- cies descritas por él mismo). Aparte del hecho de que la

Rasmont, Pierre


Visin de un cientfico onclogo que aplica la investigacin a la salud humana a travs de las fronteras

El doctor Jorge Gmez es el asesor principal del Centro para la Salud Mundial del Instituto Nacional del Cncer. Dirige la Red de Investigacin del Cncer de los Estados Unidos y Amrica Latina, la cual est realizando un estudio internacional de los factores de riesgo del cncer de mama y caractersticas en las mujeres de Amrica Latina.


Investigation of Glacial Dynamics in the Lambert Glacier-Amery Ice Shelf System (LAS) Using Remote Sensing  

E-print Network

shelves exist for the East Antarctic Ice Sheet. In addition, most recent surface velocity mappings of the Lambert Glacier-Amery Ice Shelf system (LAS) are derived for the time period of 1997-2000. From this research, surface velocity measurements provide a...

Chi, Zhaohui 1982-



Human-health pharmaceutical compounds in Lake Mead, Nevada and Arizona, and Las Vegas Wash, Nevada, October 2000-August 2001  

USGS Publications Warehouse

The U.S. Geological Survey and the National Park Service conducted a reconnaissance study to investigate the occurrence of selected human-health pharmaceutical compounds in water samples collected from Lake Mead on the Colorado River and Las Vegas Wash, a waterway used to transport treated wastewater from the Las Vegas metropolitan area to Lake Mead. Current research indicates many of these compounds can bioaccumulate and may adversely affect aquatic organisms by disrupting physiological processes, impairing reproductive functions, increasing cancer rates, contributing to the development of antibiotic-resistant strains of bacteria, and acting in undesirable ways when mixed with other substances. These compounds may be present in effluent because a high percentage of prescription and non-prescription drugs used for human-health purposes are excreted from the body as a mixture of parent compounds and degraded metabolite compounds; also, they can be released to the environment when unused products are discarded by way of toilets, sinks, and trash in landfills. Thirteen of 33 targeted compounds were detected in at least one water sample collected between October 2000 and August 2001. All concentrations were less than or equal to 0.20 micrograms per liter. The most frequently detected compounds in samples from Las Vegas Wash were caffeine, carbamazepine (used to treat epilepsy), cotinine (a metabolite of nicotine), and dehydronifedipine (a metabolite of the antianginal Procardia). Less frequently detected compounds in samples collected from Las Vegas Wash were antibiotics (clarithromycin, erythromycin, sulfamethoxazole, and trimethoprim), acetaminophen (an analgesic and anti-inflammatory), cimetidine (used to treat ulcers), codeine (a narcotic and analgesic), diltiazem (an antihypertensive), and 1,7-dimethylxanthine (a metabolite of caffeine). Fewer compounds were detected in samples collected from Lake Mead than from Las Vegas Wash. Caffeine was detected in all samples collected from Lake Mead. Other compounds detected in samples collected from Lake Mead were acetaminophen, carbamazepine, cotinine, 1,7-dimethylxanthine, and sulfamethoxazole.

Boyd, Robert A.; Furlong, Edward T.



Unraveling the contributions of hydrogen-bonding interactions to the activity of native and non-native ligands in the quorum-sensing receptor LasR.  


Quorum sensing (QS) via the synthesis and detection of N-acyl l-homoserine lactone (AHL) signals regulates important pathogenic and mutualistic phenotypes in many bacteria. Over the past two decades, the development of non-native molecules that modulate this cell-cell signaling process has become an active area of research. The majority of these compounds were designed to block binding of the native AHL signal to its cognate LuxR-type receptor, and much effort has focused on LasR in the opportunistic pathogen Pseudomonas aeruginosa. Despite a small set of reported LasR structural data, it remains unclear which polar interactions are most important for either (i) activation of the LasR receptor by its native AHL signal, N-(3-oxo)-dodecanoyl l-homoserine lactone (OdDHL), or (ii) activation or inhibition of LasR by related AHL analogs. Herein, we report our investigations into the activity of OdDHL and five synthetic analogs in wild-type LasR and in nine LasR mutants with modifications to key polar residues in their ligand binding sites. Our results allowed us to rank, for the first time, the relative importance of each LasR:OdDHL hydrogen bond for LasR activation and provide strong evidence for the five synthetic ligands binding LasR in a very similar orientation as OdDHL. By delineating the specific molecular interactions that are important for LasR modulation by AHLs, these findings should aid in the design of new synthetic modulators of LasR (and homologous LuxR-type receptors) with improved potencies and selectivities. PMID:25474181

Gerdt, Joseph P; McInnis, Christine E; Schell, Trevor L; Blackwell, Helen E



[Tegumental leishmaniasis in Las Lomitas, Province of Formosa, Argentina, 1992-2001].  


Las Lomitas Hospital reported 85 cases of tegumentary leishmaniasis between 1992 and 2001. The cases were males (72.9%), 91.8% older than 10 years, 10.5% presented mucosae involvement. A single ulcer on lower limbs was the most frequent manifestation. The epidemiological and clinical patterns were consistent with the infection due to Leishmania (Viannia) braziliensis. The annual distribution of ulcers onset was bimodal, the frequency of cases had a significant association with the Bermejo river volume, and the rainfall of the previous year. Intradermoreaction and recalling questions suggested that fishing in the river was the main risk activity. Among 1018 Phlebotominae collected, 97.1% were Lutzomyia neivai, 2.3% L. migonei and 0.6% L. cortelezzii (0.6%), the peridomestic/gallery forest of the Bermejo river proportion was 1/9, with similar composition to the populations around the same river in Salta province. The increase of cases since 1992, the ongoing environmental changes due to developmental works, and the potential installation of a periurban transmission cycle, require an active surveillance of cases and entomological components in the Chaco region. PMID:12532691

Salomn, Oscar D; Sosa Estani, Sergio; Dri, Luca; Donnet, Marta; Galarza, Rosala; Recalde, Hugo; Tijera, Angel



Fueling Population Growth in Las Vegas: How Large-scale Groundwater Withdrawal Could Burn Regional Biodiversity  

NSDL National Science Digital Library

This article from the September 2007 issue of BioScience provides information about urban development and the impacts on groundwater and biodiversity. Policy strategies are also discussed. Explosive growth in Las Vegas, Nevada, has stimulated demand for additional water supplies. To meet these needs, local officials hope to obtain rights to about 200,000 acre-feet (246.70 million cubic meters [m3]) per year from a regional groundwater aquifer extending from Salt Lake City, Utah, to Death Valley, California. Officials from satellite communities are pursuing rights to an additional 870,487 acre-feet (1.07 billion m3) per year. If granted, these new permits would trigger declines in groundwater across at least 78 basins covering nearly 130,000 square kilometers. Water-rights decisions have historically interpreted economic development as a more compelling public interest than maintenance of natural systems. If economic development continues to drive allocation decisions, consequent declines in the water table, spring discharge, wetland area, and streamflow will adversely affect 20 federally listed species, 137 other water-dependent endemic species, and thousands of rural domestic and agricultural water users in the region. Reducing consumption and implementing cost-effective technologies, such as recovery of urban runoff and shallow saline groundwater, indirect reuse of potable water, and desalinization, offer ways to meet metropolitan and ecological needs within the limits of the resource.




Nuevos escenarios de la migracin Mxico-Estados Unidos. Las consecuencias de la guerra antiinmigrante  

PubMed Central

La historia de la migracin Mxico-Estados Unidos se caracteriza por una serie de periodos durante los cuales los patrones migratorios se transforman y evolucionan como respuesta a los cambios en la poltica migratoria de Estados Unidos. En la dcada de 1990 se dio uno de estos cambios, lo que provoc el paso de la era de la contradiccin a la era de la marginalizacin. Actualmente, un gran nmero de migrantes indocumentados permanecen al margen de la ley, precisamente en un periodo en el que las penas se han incrementado y la persecucin ha alcanzado niveles rcord. De manera cada vez ms notoria, los migrantes indocumentados, por la represin interna y fronteriza, quedan obligados a romper los lazos que los vinculaban con sus lugares de destino, pero al mismo tiempo se sienten cada vez ms extraos en una tierra donde la aplicacin de polticas antiinmigrantes es cosa de todos los das, lo que los sita en una posicin de marginalizacin y gran vulnerabilidad. PMID:21209790

MASSEY, Douglas S.; PREN, Karen A.; DURAND, Jorge



A method based on local approximate solutions (LAS) for inverting transient flow in heterogeneous aquifers  

NASA Astrophysics Data System (ADS)

An inverse method based on local approximate solutions (LAS inverse method) is proposed to invert transient flows in heterogeneous aquifers. Unlike the objective-function-based inversion techniques, the method does not require forward simulations to assess measurement-to-model misfits; thus the knowledge of aquifer initial conditions (IC) and boundary conditions (BC) is not required. Instead, the method employs a set of local approximate solutions of flow to impose continuity of hydraulic head and Darcy fluxes throughout space and time. Given sufficient (but limited) measurements, it yields well-posed systems of nonlinear equations that can be solved efficiently with optimization. Solution of the inversion includes parameters (hydraulic conductivities, specific storage coefficients) and flow field including the unknown IC and BC. Given error-free measurements, the estimated conductivities and specific storages are accurate within 10% of the true values. When increasing measurement errors are imposed, the estimated parameters become less accurate, but the inverse solution is still stable, i.e., parameter, IC, and BC estimation remains bounded. For a problem where parameter variation is unknown, highly parameterized inversion can reveal the underlying parameter structure, whereas equivalent conductivity and average storage coefficient can also be estimated. Because of the physically-based constraints placed in inversion, the number of measurements does not need to exceed the number of parameters for the inverse method to succeed.

Jiao, Jianying; Zhang, Ye



Can a Spanish science education journal become international? the case of Enseanza de las Ciencias  

NASA Astrophysics Data System (ADS)

In this paper we discuss the case of the science education research journal Enseanza de las Ciencias (EC) around the issue of its internationalization and the consequences this process has had and is still having on the use and preservation of different languages and more specifically the Castilian (Spanish) language. We first frame the concept of globalization and internationalization, and identify three important dimensions involved in the process of internationalization of EC such as language use, actors involved and resources available. Secondly, we address the historical evolution of EC along three phases of internationalization. In each phase we discuss the tensions experienced in relevant internationalization dimensions focusing particularly on the use of languages. We conclude by advocating a plurilingual and multicultural model for a science education research journal as an alternative to the hegemony of international English written journals. In doing so we want to continue the conversation on the role that local and national science education research journals have in promoting science education around the world.

Espinet, Mariona; Izquierdo, Merc; Garcia-Pujol, Clara



Targeting Planetary Anomalies in Microlensing Events with the Las Cumbres Observatory Global Telescope Network  

NASA Astrophysics Data System (ADS)

By the nature of these transient, non-repeating phenomena, observing microlensing events requires a fast, responsive system of telescopes distributed over a range of longitudes. The Las Cumbres Observatory Global Telescope Network currently consists of the 2m Faulkes Telescopes North and South. Over the course of the next few years LCOGT will expand this network to a complement of 44, including 2x2m, 18x1m and 24x0.4m which will be sited in clusters of 3-4 telescopes such that at least one site is in the dark at any given time, enabling us to provide 24hr coverage of any transient event. The telescopes are controlled via a robotic scheduler, allowing a fast response to alerts from eStar or other robotic agents or to manual override. Both 2m telescopes have been engaged in robotically-controlled follow-up of 222 OGLE and MOA alerts during the 2007 Bulge season and intensive observations of 2 events displaying clear anomalies. We summarise here the results to date.

Street, Rachel; RoboNet Microlensing Team



Integrated geophysical methods for studying the karst system of Gruta de las Maravillas (Aracena, Southwest Spain)  

NASA Astrophysics Data System (ADS)

In this study we contrast the results of different geophysical methods in order to describe the karst system surrounding of the Gruta de las Maravillas cave (Aracena, Spain). A comprehensive study of the geophysical responses of the known cavity was carried out, after which several sections were studied to detect the karst architecture and cave continuity. To ensure precision, the inner 3D-topography of the cave was determined by classical geodetic techniques and a digital terrain model was performed with differential GPS. The microgravity method was used to obtain the residual gravity map of the entire study zone, whose minima could be related to caves. Then, the negative gravity anomalies were analyzed to plan several lines for implementing further geophysical methods: magnetic profiles (MP), electrical resistivity tomography (ERT), induced polarization (IP), 2D seismic prospection (refraction tomography and reflection sections) and ground penetrating radar (GPR). The resulting models for each line explored were integrated with detailed geological maps to establish the unknown continuity of the caves. Finally, we discuss the suitability of each geophysical technique for cave detection in marble with sulfur host rock and propose the best procedures to constrain their geometries.

Martnez-Moreno, F. J.; Galindo-Zaldvar, J.; Pedrera, A.; Teixido, T.; Ruano, P.; Pea, J. A.; Gonzlez-Castillo, L.; Ruiz-Constn, A.; Lpez-Chicano, M.; Martn-Rosales, W.



Exploring the unified class of Type II Supernovae with the Las Cumbres Observatory Global Telescope Network  

NASA Astrophysics Data System (ADS)

Traditionally Type II supernovae (SNe) have been separated into two distinct classes based on the shape of their light curves after peak: Type II plateau (IIP) and Type II linear (IIL) SNe. Recent works suggest that Type II SNe form a continuum of objects from a single progenitor system. Here we present data for a set of Type II SNe collected with the Las Cumbres Observatory Global Telescope (LCOGT) Network and observed simultaneously with UVOT-Swift. In the growing sample of Type II SNe, we search for clear evidence to distinguish the two classes. SNe IIL show a similar drop at the end of their short steep plateau that resemble the drop visible in SNe IIP. We show that also at early phase SNe IIP and IIL are similar both in the UV and in the optical. Our analysis is consistent with the scenario that SNe IIP and IIL come from similar progenitors but with SN IIL progenitors having been stripped of their hydrogen envelope before explosion. While SNe IIL are on average more luminous than SNe IIP, we show that they both produce a comparable amount of nickel.

Valenti, Stefano; Howell, Dale Andrew; Sand, David J.; Arcavi, Iair; Hosseinzadeh, Griffin; McCully, Curtis



Evapotranspiration of Mixed Shrub Communities in Phreatophytic Zones of the Great Basin D.A. Devitt1, L.K. Fenstermaker2, M. Young2, B. Conrad1 and B. Bird1 1 School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 2 Desert Research Institute, Las Vegas, NV  

Microsoft Academic Search

Water limitations in the arid and semiarid regions of the southwestern United States have led many water managers of municipalities to begin the process of diversifying their water resource portfolios. Las Vegas in particular, is pursuing groundwater exportation from east central basins in Nevada. Estimating evapotranspiration (ET) is a critical component to closing hydrologic balances in these basins. As such,

D. A. Devitt; L. K. Fenstermaker; M. Young; B. Conrad; B. Bird



1 H, 13 C and 15 N backbone assignments for the ligand binding domain of the Pseudomonas aeruginosa virulence regulator LasR  

Microsoft Academic Search

LasR regulates toxin production in Pseudomonas aeruginosa and its inhibition can attenuate the virulence of this opportunistic human pathogen. To aid studies of interactions with\\u000a inhibitors, we report the NMR backbone assignments for the dimeric LasR ligand-binding domain.

Matthew James Bottomley; Ester Muraglia; Renzo Bazzo



Cmo comprar alimentos de manera segura Preste atencin a las fechas estampadas en los paquetes de los alimentos. La mayora de los  

E-print Network

Cómo comprar alimentos de manera segura Preste atención a las fechas estampadas en los paquetes de los alimentos. La mayoría de los alimentos tienen fechas estampadas en el paquete que indican "fecha que se debe vender o consumir un alimento para obtener la mejor calidad. A excepción de las frutas y


Nunca deje alimentos en la zona peligrosa (temperaturas entre 40 F) por ms de 2 horas. Las bacterias se multiplican rpidamente  

E-print Network

Nunca deje alimentos en la zona peligrosa (temperaturas entre 40° F y 140° F) por más de 2 horas. Las bacterias se multiplican rápidamente en los alimentos que están en estas temperaturas. Las temperaturas apropiadas en el refrigerador y el congelador ayudan a conservar los alimentos en buen estado y



Microsoft Academic Search

En este articulo se exponen los resultados del estudio emprico llevado a cabo en 186 empresas de alojamiento turstico a nivel nacional certificadas con la marca Q de Calidad Turstica, planteado con el objetivo de analizar las motivaciones que llevan a las empresas del sector turstico a implementar y certificar Sistemas de Gestin de la Calidad. Realizada una exhaustiva revisin

Jos lvarez Garca; Jos Antonio Fraiz Brea; Mara de la Cruz Del Ro Rama



Este libro surge de la investigacin de los procesos migratorios que no solo resultan de la oferta laboral sino tambin de la dinmica propia de las redes  

E-print Network

movilidad y los procesos migratorios en el espacio de frontera argentino - boliviana. Entre 2001 y 2005, en el esfuerzo por mostrar las peculiaridades de la movilidad de las personas al interior de la zona sur (Francia). Movilidad y Procesos Migratorios en el Espacio de Frontera Argentino Boliviana Hervé Domenach

Boyer, Edmond


Informe Anual a la Nacin indica que los ndices generales de cncer siguen disminuyendo; su seccin especial destaca las tendencias actuales y pronsticos del cncer colorrectal

Los ndices de casos nuevos diagnosticados y los ndices de muertes de todos los tipos de cncer combinados disminuyeron en forma considerable en el perodo ms reciente para hombres y mujeres en general, y para la mayora de las poblaciones raciales y tnicas de Estados Unidos, segn un informe de las principales organizaciones de salud y oncolgicas.


Fractales en ciencia y arte. Discusiones posibles en el marco de las concepciones realistas y antirrealistas en la Filosofa de la Ciencia.  

E-print Network

un lado, la concepción realista de la ciencia, y un autor clave: Ian Hacking en textos clásicos certeza si tanto las entidades como las teorías, son verdaderas o falsas. Para Hacking, la realidad y la torno a fractales, como punto de encuentro entre la ciencia y el arte. Ian Hacking: Un realista muy

Paris-Sud XI, Université de



SciTech Connect

In response to the report ''Investigation of Beryllium Exposure Cases Discovered at the North Las Vegas Facility of the National Nuclear Security Administration'', published by the U.S. Department of Energy (DOE), National Nuclear Security Administration (NNSA) in August 2003, Bechtel Nevada (BN) President and General Manager Dr. F. A. Tarantino appointed the Beryllium Investigation & Assessment Team (BIAT) to identify both the source and pathway for the beryllium found in the North Las Vegas (NLV) B-Complex. From September 8 to December 18, 2003, the BIAT investigated the pathway for beryllium and determined that a number of locations existed at the Nevada Test Site (NTS) which could have contained sufficient quantities of beryllium to result in contamination if transported. Operations performed in the B-1 Building as a result of characterization activities at the Engine Maintenance, Assembly, and Disassembly (EMAD); Reactor Maintenance, Assembly, and Disassembly (RMAD); Test Cells A and C; and the Central Support Facility in Area 25 had the greatest opportunity for transport of beryllium. Investigative monitoring and sampling was performed at these sites with subsequent transport of sample materials, equipment, and personnel from the NTS to the B-1 Building. The timeline established by the BIAT for potential transport of the beryllium contamination into the B-1 Building was from September 1997 through November 2002. Based on results of recently completed swipe sampling, no evidence of transport of beryllium from test areas has been confirmed. Results less than the DOE beryllium action level of 0.2 ???g/100 cm2 were noted for work support facilities located in Area 25. All of the identified sites in Area 25 worked within the B-1 tenant's residency timeline have been remediated. Legacy contaminants have either been disposed of or capped with clean borrow material. As such, no current opportunity exists for release or spread of beryllium contamination. Historical records indicate that there are locations at the NTS which contain hazardous quantities of beryllium; however, because beryllium was not always considered a contaminant of concern, complete characterization was not performed prior to remediation efforts. Today, it is not practical to characterize Area 25 for beryllium due to the successful remediation. Analysis of sample data collected in B-1 for the BIAT was performed for the purpose of confirming past results and identifying a source of beryllium through the use of markers. The results confirmed the presence of man-made beryllium contamination in the B-1 High Bay at levels consistent with the NNSA Report. No source markers were found that would be associated with NTS historical nuclear rocket or weapons-related operations. Beryllium contamination was identified in the southwest area of the B-1 High Bay in characteristic association with materials handled during historic metal-working operations. Use of source marker analysis suggests a contributor of beryllium found in carpeted areas of the B-Complex may be naturally occurring. Naturally occurring beryllium is not regulated by Title 10 Code of Federal Regulations Part 850 (10 CFR 850) (see Appendix A). No current uncontrolled beryllium source or transport pathways have been identified as available for spread of contamination to uncontrolled areas from the NTS.




The Galaxy-Weighted Small-Scale Velocity Dispersion of the Las Campanas Redshift Survey  

E-print Network

The pair-weighted relative velocity dispersion of galaxies provides a measure of the thermal energy of fluctuations of the observed galaxy distribution, but the measure is difficult to interpret and is very sensitive to the existence of rare, rich clusters of galaxies. Several alternative statistical procedures have recently been suggested to relieve these problems. We apply a variant of the object-weighted statistical method of Davis, Miller, & White (1997) to the Las Campanas Redshift Survey (LCRS), which is the largest and deepest existing redshift survey that is nearly fully sampled. The derived one-dimensional dispersion on scales ~ 1 Mpc/h is quite low: sigma_1 = 126 +/- 10 km/s, with a modest decrease at larger scales. The statistic is very stable; the six independent slices of the LCRS all yield consistent results. We apply the same statistical procedure to halos in numerical simulations of an open cosmological model and flat models with and without a cosmological constant. In contrast to the LCRS, all the models show a dispersion which increases for scales > 1 Mpc/h; it is uncertain whether this is a numerical artifact or a real physical effect. The standard cluster-normalized Cold Dark Matter model with Omega_m = 1 as well as a tilted variant with n = 0.8 yield dispersions substantially hotter than the LCRS value, while models with low matter density (Omega_m = 0.3) are broadly consistent with the LCRS data. Using a filtered cosmic energy equation, we measure Omega_m ~ 0.2, with small-scale bias factors b = 1.0--1.5 for high-density models and b = 0.7--1.1 for low-density models.

Jonathan E. Baker; Marc Davis; Huan Lin



Diffuse CO2 flux emissions from the soil in Las Caadas caldera (Tenerife, Canary Islands)  

NASA Astrophysics Data System (ADS)

Starting in April 2004, unusual seismic activity was observed in the interior of the island of Tenerife (Canary Islands, Spain) with much evidence pointing to a reawakening of volcanic activity. During this seismic crisis, several events were felt by the population. Since then, a dense multiparametric monitoring network has been deployed all over the island by Instituto Geogrfico Nacional (IGN). In the framework of this volcanic surveillance project, several geochemical studies have been accomplished. Measurements of diffuse CO2 flux from the soil have been carried out in some zones inside Las Caadas caldera. This study has been performed during three different field campaigns in November 2012 and June and November 2013. The studied area includes two different zones known as Roques de Garca and Los Azulejos. Since several authors have reported the existence of fractures and faults all along both structures, the objectives of this work were to find anomalous CO2 fluxes from the soil and preferential degassing areas, identify possible hidden faults and study the origin of gas emanations in order to detect the presence of magmatic sources. More than 600 sampling sites have been measured with the accumulation chamber method in an area of about 1 km2. Soil gas has been sampled in points where high CO2 fluxes were detected for the determination of chemical and isotopic composition. The results of the gas prospection confirm the existence of CO2 degassing in the area. Some anomalous fluxes have been measured along previously inferred volcano-tectonic structures. The highest anomalies were found in Los Azulejos with values up to 1774 g/m2.d. Chemical analysis did not reveal significant concentrations of magmatic or geothermal gases except CO2. The latter showed concentrations at 50 cm depth within the soils up to 48% and a C-isotopic composition between -4.72 and -3.67 o indicating a prevailing magmatic origin.

Luengo-Oroz, Natividad; Torres, Pedro A.; Moure, David; D'Alessandro, Walter; Liuzzo, Marco; Longo, Manfredi; Pecoraino, Giovannella



Proximal record of the 273 ka Poris caldera-forming eruption, Las Caadas, Tenerife  

NASA Astrophysics Data System (ADS)

Lithofacies architecture analysis is applied to the most proximal exposures of the 273 ka Poris Formation, in the Diego Hernandez caldera wall of Las Caadas. Here, the succession records an opening Plinian phase followed by generation of a pyroclastic density current (PDC) that was partly blocked by near-vent topography. The upper part of the current surmounted the barrier and deposited an ignimbrite veneer. During a hiatus in energetic flow, ash and various ash aggregates were deposited from a hybrid cloud comprising parts of both the Plinian and the co-ignimbrite plumes. Phreatomagmatic explosions then generated currents rich in fine-grained lithics; current waxing with local erosion was followed by pulsing-unsteady waning, recorded in repeated sets of graded tuff. Reversion to magmatic activity was marked by hybrid deposition, as coarse pumice fallout and juvenile ballistics entered pyroclastic currents to form stratified pumice-block tuff. Increasingly energetic flow is recorded in 9 m of mainly massive lapilli tuff that includes evidence of widespread scour and bypass; lithic-rich layers record incremental onset of edifice disruption due to magma withdrawal. Laterally variable stratification and load structures show that the PDC was unsteady and highly non-uniform at times, with locally rapid aggradation of gas-rich ignimbrite. Climactic edifice disruption is marked by a lithic-block layer in erosional contact with the underlying ignimbrite, recording intense pyroclastic current activity and widespread bypass of material to distal volcano slopes. Pumice-block breccia, 10 m thick and with blocks up to 1.2 m in diameter, forms the top of the succession and registers modification of the magmatic plumbing. The timing of collapse to form a major summit depression is uncertain. However, the abrupt termination of the proximal aggradation of coarse breccia, with no record there of any waning-stage pyroclastic currents, suggests subsidence at that time, conceivably with formation of a caldera that contained late-erupted material.

Smith, Natasha J.; Kokelaar, B. Peter



Computer graphics synthesis for inferring artist studio practice: an application to Diego Velzquez's Las Meninas[  

NASA Astrophysics Data System (ADS)

Diego Velzquez's Las meninas (1656) has been called by some art experts "the most important painting of the 17th century," "a theology of painting," and even "the world's greatest painting"; it has been the subject of intensive study. The work depicts a complex scene in the Alczar palace of King Philip IV of Spain, and includes mirror reflections of the king and queen, apparently standing in place of the viewer, as well as the artist himself standing before an enormous canvas on an easel. Nevertheless, questions remain about the studio and the proper viewing configuration: Is the artist looking toward the perspectivally correct position of the viewer in the museum space (center of projection), outside the picture space? Does the perspectivally correct position correspond to the locations of the king and queen seen reflected in the mirror? Is the bright illumination on the king and queen (as revealed in the mirror) consistent with the lighting in the tableau itself? We addressed these questions in a new way: by building a full computer graphics model of the figures and tableau as well as the viewer's space outside the painting. In our full model, the painting itself is represented as a translucent window onto which the picture space is projected toward the center of projection, that is, the viewer. Our geometric and (new) lighting evidence confirm Janson's and Snyder's contention that the plane mirror on the back wall reflects the other side of the large painting depicted within the tableau, not the king and queen themselves in the studio. We believe our computer graphics synthesis of both the tableau within the painting and the viewer's space in the real world is the first of its kind to address such problems in the history of art.

Stork, David G.; Furuichi, Yasuo



Seismic Wave Amplification in Las Vegas: Site Characterization Measurements and Response Models  

NASA Astrophysics Data System (ADS)

As part of a multidisciplinary effort to understand seismic wave amplification in Las Vegas Valley, we conducted geotechnical and seismic refraction field studies, geologic and lithologic interpretation, and geophysical model building. Frequency-dependent amplifications (site response) and peak ground motions strongly correlate with site conditions as characterized by the models. The models include basin depths and velocities, which also correlate against ground motions. Preliminary geologic models were constructed from detailed geologic and fault mapping, logs of over 500 wells penetrating greater than 200 m depth, gravity-inversion results from the USGS, and USDA soil maps. Valley-wide refraction studies we conducted in 2002 and 2003 were inverted for constraints on basin geometry, and deep basin and basement P velocities with some 3-d control to depths of 5 km. Surface-wave studies during 2002-2004 characterized more than 75 sites within the Valley for shear velocity to depths exceeding 100 m, including all the legacy sites where nuclear-blast ground motions were recorded. The SASW and refraction-microtremor surface-surveying techniques proved to provide complementary, and coordinating Rayleigh dispersion-curve data at a dozen sites. Borehole geotechnical studies at a half-dozen sites confirmed the shear-velocity profiles that we derived from surface-wave studies. We then correlated all the geotechnical data against a detailed stratigraphic model, derived from drilling logs, to create a Valley-wide model for shallow site conditions. This well-log-based model predicts site measurements better than do models based solely on geologic or soil mapping.

Louie, J. N.; Anderson, J. G.; Luke, B.; Snelson, C.; Taylor, W.; Rodgers, A.; McCallen, D.; Tkalcic, H.; Wagoner, J.



Geology of Volcan Las Navajas, a pleistocene trachyte/peralkaline rhyolite volcanic center in Nayarit, Mexico  

SciTech Connect

Volcan Las Navajas, located in the northwestern portion of the Mexican Volcanic Belt has produced a sequence of volcanic rocks with compositions in marked contrast to the predominantly calc-alkaline volcanoes which predominate in this part of Mexico. The oldest exposed lavas consist of trachytes with 63% SiO/sub 2/, 6% FeO*, and 500 ppm Zr along with comenditic rhyolites with 68% SiO/sub 2/, 5% FeO*, 800 ppm Zr, and an agpaitic index of 1.0. These lavas were followed by the eruption of a comenditic ash-flow tuff and the formation of a caldera 2.7 km in diameter. This caldera was subsequently filled by eruptions of pantelleritic rhyolite obsidian lava flows with 72% SiO/sub 2/, 8% FeO*, 1100 ppm Zr, and an agpaitic index of 1.5 to 1.9. A second caldera was then formed which is offset to the south of the main eruptive vents for previous eruptions. This younger caldera has a diameter of about 4.8 km and its southern walls have been covered by calc-alkaline andesitic lavas erupted from nearby Sanganguey volcano. Volcanoclastic sediments in the floor of the younger caldera have been tilted and faulted in a manner suggestive of late stage resurgence. Subsequent eruptions within the caldera, however, have been restricted to calc-alkaline andesites. Tectonically, the area in which this volcano occurs appears to have been undergoing a crustal rifting event since the Pliocene. The occurrence of these peralkaline rocks lends further support to such a hypothesis.

Hegre, J.A.; Nelson, S.A.



Las Cumbres Observatory Global Telescope Network: Keeping Education in the Dark  

NASA Astrophysics Data System (ADS)

Las Cumbres Observatory Global Telescope Network is a non-profit organization that is building a completely robotic network of telescopes for education (24 x 0.4m, clusters of 4) and science (18 x 1.0m, clusters of 3 and 2 x 2.0 meters) which will be longitudinally spaced so there will always be at least one cluster in the dark. The network will be completely accessible online with observations being completed in either real-time or queued-based modes. The network will also have the ability to complete very long observations of all kinds of variable objects and include a rapid response system will allow the telescopes to quickly slew to unexpected phenomena and provide around-the-clock monitoring. Students will be able to do research projects using and collecting data from both the long observations (e.g. extrasolar planet follow-up, variable star light curves, etc.) and the quick response (e.g. supernovae, GRBs, etc.), as well as use their own ideas to create personalized projects. Also available online will be a huge archive of data and the ability to use online software to process it. A large library of activities and resources will be available for all age groups and levels of science. LCOGTN will work cooperatively with international organizations to bring a vast amount of knowledge and experience together to create a world class program. Through these collaborations, pilots have already been started in a few European countries, as well as trial programs involving schools partnered between the USA and UK. LCOGTN's education network will provide an avenue for educators and learners to use cutting edge technology to do real science. All you need is a broadband internet connection, computer, and lots of enthusiasm and imagination.

Ross, Rachel J.



Foraminifera from the Tepetate Formation (Heim) at Las Pocitas, Baja California Sur, Mexico Foraminferos de la formacin Tepetate (Heim) en el rea de Las Pocitas, Baja California Sur, Mxico  

Microsoft Academic Search

In order to constrain the age and depositional paleoenvironment of the Tepetate Formation, benthic and planktonic foraminifera were analyzed in samples recovered from an exploration well located at Las Pocitas, Baja California Sur, Mexico. The planktonic taxa identified allowed recognition of Zone P9 (Planorotalites palmerae-Acarinina pentacamerata), equivalent to a late early Eocene age of 50.4-49 Ma. The benthic foraminiferal association

AY Miranda-Martnez; AL Carreo



Tratamiento ayuda a las mujeres jvenes a preservar la fertilidad durante la quimioterapia para el cncer de seno

Las mujeres jvenes con cncer de seno (mama) lograron preservar la fertilidad durante los tratamientos del cncer con un frmaco inyectable bloqueador de hormonas que les provoc menopausia temporal. Los resultados del estudio se anunciaron hoy en el congreso anual de la Sociedad Americana de Oncologa Clnica (ASCO), y provienen del Estudio de Prevencin de la Menopausia Temprana (POEMS), patrocinado por el Instituto Nacional del Cncer (NCI).


Crystal Structure of the LasA Virulence Factor from Pseudomonas aeruginosa: Substrate Specificity and Mechanism of M23 Metallopeptidases  

Microsoft Academic Search

Pseudomonas aeruginosa is an opportunist Gram-negative bacterial pathogen responsible for a wide range of infections in immunocompromized individuals and is a leading cause of mortality in cystic fibrosis patients. A number of secreted virulence factors, including various proteolytic enzymes, contribute to the establishment and maintenance of Pseudomonas infection. One such is LasA, an M23 metallopeptidase related to autolytic glycylglycine endopeptidases

James Spencer; Loretta M. Murphy; Rebecca Conners; Richard B. Sessions; Steven J. Gamblin



Semana nacional de preparacin para clima severo 2 al 8 de marzo de Manual para las redes sociales  

E-print Network

Federal para el Manejo de Emergencias (FEMA, por sus siglas en inglés) y a la Administración Nacional:// #12; Twitter: Utilice la! Hable con su familia sobre las amenazas meteorológicas de su comunidad: #Sea


Problemtica de las aguas cidas en la FPI y monitorizacin del flujo de agua y calor a  

E-print Network

Problemática de las aguas ácidas en la FPI y monitorización del flujo de agua y calor a través de con el oxígeno y el agua. · Los residuos de la actividad minera aceleran los procesos de oxidación de sulfuros #12;· Cuando no se dispone de suficientes minerales alcalinos en el medio el agua superficial

Politècnica de Catalunya, Universitat


An analysis of urban thermal characteristics and associated land cover in Tampa Bay and Las Vegas using Landsat satellite data  

Microsoft Academic Search

Remote sensing data from both Landsat 5 and Landsat 7 systems were utilized to assess urban area thermal characteristics in Tampa Bay watershed of west-central Florida, and the Las Vegas valley of southern Nevada. To quantitatively determine urban land use extents and development densities, sub-pixel impervious surface areas were mapped for both areas. The urbanrural boundaries and urban development densities

George Xian; Mike Crane



Aplicaciones prácticas de la fisiología de los herbicidas en las plantas  

NSDL National Science Digital Library

Esta leccin se focaliza en el impacto de las caractersticas de la planta y el herbicida, importantes para determinar el desempeo del herbicida. Se usarn imgenes visuales para ilustrar varios principios, incluyendo el sitio de absorcin del herbicida en la planta, transporte, el sitio de accin sensible, y efectos del ambiente sobre el desempeo del herbicida. Esta informacin provee la base para maximizar la utilidad del uso de los herbicidas.


The role of faulting on surface deformation patterns from pumping-induced groundwater flow (Las Vegas Valley, USA)  

Microsoft Academic Search

Land subsidence and earth fissuring can cause damage in semiarid urbanized valleys where pumping exceeds natural recharge.\\u000a In places such as Las Vegas Valley (USA), Quaternary faults play an important role in the surface deformation patterns by\\u000a constraining the migration of land subsidence and creating complex relationships with surface fissures. These fissures typically\\u000a result from horizontal displacements that occur in

Martin Hernandez-Marin; Thomas J. Burbey



The Quorum-Sensing Negative Regulator RsaL of Pseudomonas aeruginosa Binds to the lasI Promoter  

Microsoft Academic Search

A mutation in the rsaL gene of Pseudomonas aeruginosa produces dramatically higher amounts of N-acyl homoserine lactone with respect to the wild type, highlighting the key role of this negative regulator in controlling quorum sensing (QS) in this opportunistic pathogen. The DNA binding site of the RsaL protein on the rsaL-lasI bidirectional promoter partially overlaps the binding site of the

Giordano Rampioni; Iris Bertani; Elisabetta Zennaro; Fabio Polticelli; Vittorio Venturi; Livia Leoni




E-print Network


Escolano, Francisco


Narrowband Photometry and Imaging of Deep Impact Target Comet 9P\\/Tempel 1 at Las Campanas Observatory  

Microsoft Academic Search

We present updated results from observations of Comet 9P\\/Tempel 1 during the 2005 Deep Impact Mission. During this mission, a 370kg copper projectile, designed to penetrate the mantle of 9P\\/Tempel 1, impacted the comet's surface on July 4, 2005. We will show images of the comet taken with the 2.5m DuPont telescope at Las Campanas Observatory from July 3 to

Luis A. Mondragon; S. M. Lederer; D. J. Osip; J. E. Thomas-Osip; J. M. de Buizer



The U.S. Department of Energy Office of Indian Energy Policy and Programs Las Vegas, Nevada, Roundtable Summary  

SciTech Connect

LAS VEGAS EXECUTIVE SUMMARY The Las Vegas, Nevada DOE Tribal Roundtable convened on March 16th, at the Las Vegas Hilton. The meeting was hosted by the Department of Energy (DOE) Office of Indian Policy and Programs (DOE Office of Indian Energy) and facilitated by JR Bluehouse, Program Manager, Udall Foundations U.S. Institute for Environmental Conflict Resolution (U.S. Institute). Mr. Bluehouse was assisted by Tamara, Underwood, Program Assistant, U.S. Institute.Tribal leaders and representatives from multiple tribal governments and communities attended the roundtable. Tracey LeBeau, newly appointed Director of the Office of Indian Energy attended. LaMont Jackson from DOEs Office of Electricity attended. Also attending from the administration and federal agencies were Kim Teehee, Senior Policy Advisor for Native American Affairs, The White House; Charlie Galbraith, Associate Director of the Office of Public Engagement and Deputy Associate Director of the Office of Intergovernmental Affairs, The White House; Jodi Gillette, Deputy Assistant Secretary for Policy and Economic Development, the Bureau of Indian Affairs.




Analysis of the real estate market in Las Vegas: Bubble, seasonal patterns, and prediction of the CSW indices  

NASA Astrophysics Data System (ADS)

We analyze 27 house price indices of Las Vegas from June 1983 to March 2005, corresponding to 27 different zip codes. These analyses confirm the existence of a real estate bubble, defined as a price acceleration faster than exponential, which is found, however, to be confined to a rather limited time interval in the recent past from approximately 2003 to mid-2004 and has progressively transformed into a more normal growth rate comparable to pre-bubble levels in 2005. There has been no bubble till 2002 except for a medium-sized surge in 1990. In addition, we have identified a strong yearly periodicity which provides a good potential for fine-tuned prediction from month to month. A monthly monitoring using a model that we have developed could confirm, by testing the intra-year structure, if indeed the market has returned to normal or if more turbulence is expected ahead. We predict the evolution of the indices one year ahead, which is validated with new data up to September 2006. The present analysis demonstrates the existence of very significant variations at the local scale, in the sense that the bubble in Las Vegas seems to have preceded the more global USA bubble and has ended approximately two years earlier (mid-2004 for Las Vegas compared with mid-2006 for the whole of the USA).

Zhou, Wei-Xing; Sornette, Didier



Aerosol Light Absorption and Scattering in Mexico City: Comparison With Las Vegas, NV, and Los Angeles, CA.  

NASA Astrophysics Data System (ADS)

Aerosol light scattering and absorption measurements were deployed in and near Mexico City in March 2006 as part of the Megacity Impacts on Regional and Global Environments (MIRAGE). The primary site in Mexico City was an urban site at Instituto Mexicano del Petroleo (Mexican Oil Institute, denoted by IMP). Similar campaigns were held in Las Vegas, NV in January-February, 2003; and Los Angeles, CA at numerous sites during all seasons from 2003 through 2007. The IMP site gave in-situ characterization of the Mexico City plume under favorable wind conditions. The photoacoustic instrument (PAS) used at IMP operates at 532 nm, and conveniently allowed for characterization of gaseous absorption at this wavelength as well. Light scattering measurements are accomplished within the PAS by the reciprocal nephelometery method. In Mexico City the aerosol absorption coefficient typically varies between 20 and 180 Mm-1 during the course of the day and significant diurnal variation of the aerosol single scattering albedo was observed probably as a consequence of secondary aerosol formation. We will present the diurnal variation of the scattering and absorption as well as the single scattering albedo and fraction of absorption due to gases at the IMP site and compare with Las Vegas diurnal variation. Mexico City 'breaths' more during the course of the day than Las Vegas, Nevada in part because the latitude of Mexico City resulted in more direct solar radiation. Further insight on the meteorological connections and population dynamics will be discussed.

Paredes-Miranda, G.; Arnott, W. P.; Gaffney, J. S.; Marley, N. A.; Campbell, D.; Fujita, E.



Geohydrologic reconnaissance of Lake Mead National Recreation Area; Las Vegas Wash to Opal Mountain, Nevada  

USGS Publications Warehouse

The study is a geohydrologic reconnaissance of about 170 square miles in the Lake Mead National Recreation Area from Las Vegas Wash to Opal Mountain, Nevada. The study is one of a series that describes the geohydrology of the recreation area and that indentifies areas where water supplies can be developed. Precipitation in this arid area is about 5 inches per year. Streamflow is seasonal and extremely variable except for that in the Colorado River, which adjoins the area. Pan evaporation is more than 20 times greater than precipitation; therefore, regional ground-water supplies are meager except near the Colorado River, Lake Mead, and Lake Mohave. Large ground-water supplies can be developed near the river and lakes, and much smaller supplies may be obtained in a few favorable locations farther from the river and lakes. Ground water in most of the areas probably contains more than 1,000 milligrams per liter of dissolved solids, but water that contains less than 1,000 milligrams per liter of dissolved solids can be obtained within about 1 mile of the lakes. Crystalline rocks of metamorphic, intrusive and volcanic origin crop out in the area. These rocks are overlain by conglomerate and mudstone of the Muddy Creek Formation, gravel and conglomerate of the older alluvium, and sand and gravel of the Chemehuevi Formation and younger alluvium. The crystalline rocks, where sufficiently fractured, yield water to springs and would yield small amounts of water to favorably located wells. The poorly cemented and more permeable beds of the older alluvium, Chemehuevi Formation, and younger alluvium are the better potential aquifers, particularly along the Colorado River and Lakes Mead and Mohave. Thermal springs in the gorge of the Colorado River south of Hoover Dam discharge at least 2,580 acre-feet per year of water from the volcanic rocks and metamorphic and plutonic rocks. The discharge is much greater than could be infiltrated in the drainage basin above the springs. Transbasin movement of ground water probably occurs , and perhaps the larger part of the spring discharge is underflow from Eldorado Valley. The more favorable sites for ground-water development are along the shores of Lakes Mead and Mohave and are the Fire Mountain, Opal Mountain to Aztec Wash, and Hemenway Wash sites. Wells yielding several hundred gallons per minute of water of acceptable chemical quality can be developed at these sites. (USGS)

Laney, R.L.



Enzymatic Depilation of Animal Hide: Identification of Elastase (LasB) from Pseudomonas aeruginosa MCM B-327 as a Depilating Protease  

PubMed Central

Conventional leather processing involving depilation of animal hide by lime and sulphide treatment generates considerable amounts of chemical waste causing severe environmental pollution. Enzymatic depilation is an environmentally friendly process and has been considered to be a viable alternative to the chemical depilation process. We isolated an extracellular protease from Pseudomonas aeruginosa strain MCM B-327 with high depilation activity using buffalo hide as a substrate. This 33 kDa protease generated a peptide mass fingerprint and de novo sequence that matched perfectly with LasB (elastase), of Pseudomonas aeruginosa. In support of this data a lasB mutant of MCM B-327 strain lacked depilatory activity and failed to produce LasB. LasB heterologously over-produced and purified from Escherichia coli also exhibited high depilating activity. Moreover, reintroduction of the lasB gene to the P. aeruginosa lasB mutant via a knock-in strategy also successfully restored depilation activity thus confirming the role of LasB as the depilating enzyme. PMID:21347249

Pandeeti, Emmanuel Vijay Paul; Pitchika, Gopi Krishna; Jotshi, Jyotsna; Nilegaonkar, Smita S.; Kanekar, Pradnya P.; Siddavattam, Dayananda



Reconciling Scale Mismatch in Water Governance, Hydro-climatic Processes and Infrastructure Systems of Water Supply in Las Vegas  

NASA Astrophysics Data System (ADS)

Water resource systems are a classic example of a common pool resource due to the high cost of exclusion and the subtractability of the resource; for common pool resources, the performance of governance systems primarily depends on how well matched the institutional arrangements and rules are to the biophysical conditions and social norms. Changes in water governance, hydro-climatic processes and infrastructure systems occur on disparate temporal and spatial scales. A key challenge is the gap between current climate change model resolution, and the spatial and temporal scale of urban water supply decisions. This gap will lead to inappropriate management policies if not mediated through a carefully crafted decision making process. Traditional decision support and planning methods (DSPM) such as classical decision analysis are not equipped to deal with a non-static climate. While emerging methods such as decision scaling, robust decision making and real options are designed to deal with a changing climate, governance systems have evolved under the assumption of a static climate and it is not clear if these methods are well suited to the existing governance regime. In our study, these questions are contextualized by examining an urban water utility that has made significant changes in policy to adapt to changing conditions: the Southern Nevada Water Authority (SNWA) which serves metropolitan Las Vegas. Like most desert cities, Las Vegas exists because of water; the artesian springs of the Las Vegas Valley once provided an ample water supply for Native Americans, ranchers and later a small railroad city. However, population growth has increased demands far beyond local supplies. The area now depends on the Colorado River for the majority of its water supply. Natural climate variability with periodic droughts has further challenged water providers; projected climate changes and further population growth will exacerbate these challenges. Las Vegas is selected as a case study due to the combined challenges of population growth and climate change, common in the arid west, and due its cooperative institutional response to these challenges, unprecedented in the arid west. To begin to disentangle this question we have analyzed the institutional arrangements and rules which govern water decision making in the Las Vegas Valley and evaluated the existing DSPM used by the SNWA and partner utilities. Presented here are the preliminary results from an ongoing project.

Garcia, M. E.; Alarcon, T.; Portney, K.; Islam, S.



Las Palmeras Molecular Dynamics: A flexible and modular molecular dynamics code  

NASA Astrophysics Data System (ADS)

Las Palmeras Molecular Dynamics (LPMD) is a highly modular and extensible molecular dynamics (MD) code using interatomic potential functions. LPMD is able to perform equilibrium MD simulations of bulk crystalline solids, amorphous solids and liquids, as well as non-equilibrium MD (NEMD) simulations such as shock wave propagation, projectile impacts, cluster collisions, shearing, deformation under load, heat conduction, heterogeneous melting, among others, which involve unusual MD features like non-moving atoms and walls, unstoppable atoms with constant-velocity, and external forces like electric fields. LPMD is written in C++ as a compromise between efficiency and clarity of design, and its architecture is based on separate components or plug-ins, implemented as modules which are loaded on demand at runtime. The advantage of this architecture is the ability to completely link together the desired components involved in the simulation in different ways at runtime, using a user-friendly control file language which describes the simulation work-flow. As an added bonus, the plug-in API (Application Programming Interface) makes it possible to use the LPMD components to analyze data coming from other simulation packages, convert between input file formats, apply different transformations to saved MD atomic trajectories, and visualize dynamical processes either in real-time or as a post-processing step. Individual components, such as a new potential function, a new integrator, a new file format, new properties to calculate, new real-time visualizers, and even a new algorithm for handling neighbor lists can be easily coded, compiled and tested within LPMD by virtue of its object-oriented API, without the need to modify the rest of the code. LPMD includes already several pair potential functions such as Lennard-Jones, Morse, Buckingham, MCY and the harmonic potential, as well as embedded-atom model (EAM) functions such as the Sutton-Chen and Gupta potentials. Integrators to choose include Euler (if only for demonstration purposes), Verlet and Velocity Verlet, Leapfrog and Beeman, among others. Electrostatic forces are treated as another potential function, by default using the plug-in implementing the Ewald summation method. Program summaryProgram title: LPMD Catalogue identifier: AEHG_v1_0 Program summary URL: Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: GNU General Public License version 3 No. of lines in distributed program, including test data, etc.: 509 490 No. of bytes in distributed program, including test data, etc.: 6 814 754 Distribution format: tar.gz Programming language: C++ Computer: 32-bit and 64-bit workstation Operating system: UNIX RAM: Minimum 1024 bytes Classification: 7.7 External routines: zlib, OpenGL Nature of problem: Study of Statistical Mechanics and Thermodynamics of condensed matter systems, as well as kinetics of non-equilibrium processes in the same systems. Solution method: Equilibrium and non-equilibrium molecular dynamics method, Monte Carlo methods. Restrictions: Rigid molecules are not supported. Polarizable atoms and chemical bonds (proteins) either. Unusual features: The program is able to change the temperature of the simulation cell, the pressure, cut regions of the cell, color the atoms by properties, even during the simulation. It is also possible to fix the positions and/or velocity of groups of atoms. Visualization of atoms and some physical properties during the simulation. Additional comments: The program does not only perform molecular dynamics and Monte Carlo simulations, it is also able to filter and manipulate atomic configurations, read and write different file formats, convert between them, evaluate different structural and dynamical properties. Running time: 50 seconds on a 1000-step simulation of 4000 argon atoms, running on a single 2.67 GHz Intel processor.

Davis, Sergio; Loyola, Claudia; Gonzlez, Felipe; Peralta, Joaqun



The influence of faults in basin-fill deposits on land subsidence, Las Vegas Valley, Nevada, USA  

NASA Astrophysics Data System (ADS)

The role of horizontal deformation caused by pumping of confined-aquifer systems is recognized as contributing to the development of earth fissures in semiarid regions, including Las Vegas Valley, Nevada. In spite of stabilizing water levels, new earth fissures continue to develop while existing ones continue to lengthen and widen near basin-fill faults. A three-dimensional granular displacement model based on Biot's consolidation theory (Biot, MA, 1941, General theory of three-dimensional consolidation. Jour. Applied Physics 12:155-164) has been used to evaluate the nature of displacement in the vicinity of two vertical faults. The fault was simulated as (1) a low-permeability barrier to horizontal flow, (2) a gap or structural break in the medium, but where groundwater flow is not obstructed, and (3) a combination of conditions (1) and (2). Results indicate that the low-permeability barrier greatly enhances horizontal displacement. The fault plane also represents a location of significant differential vertical subsidence. Large computed strains in the vicinity of the fault may suggest high potential for failure and the development of earth fissures when the fault is assumed to have low permeability. Results using a combination of the two boundaries suggest that potential fissure development may be great at or near the fault plane and that horizontal deformation is likely to play a key role in this development. Rsum. On considre que la dformation horizontale provoque par un pompage dans un aquifre captif joue un rle dans le dveloppement des fissures du sol en rgions semi-arides, comme la valle de Las Vegas (Nevada). Malgr des niveaux d'eau stabiliss, de nouvelles fissures du sol continuent de se dvelopper en longueur et en largeur au voisinage de failles dans les bassins sdimentaires. Un modle de dplacement granulaire tri-dimensionnel, bas sur la thorie de la consolidation de Biot (Biot, M A, 1941, General theory of three-dimensional consolidation. Jour. Applied Physics 12:155-164), a t utilis pour valuer la nature du dplacement au voisinage de deux failles verticales. La faille a t simule comme 1) une barrire de faible permabilit pour l'coulement horizontal, 2) une rupture structurale dans le milieu, mais sans obstruction de l'coulement, et 3) une combinaison des deux prcdentes conditions. Les rsultats indiquent que la barrire de faible permabilit favorise fortement le dplacement horizontal. Le plan de faille constitue aussi un lieu de subsidence diffrentielle verticale significative. Les fortes contraintes calcules au voisinage de la faille laissent penser qu'il existe un fort potentiel de rupture et le dveloppement de fissures du sol quand on suppose que la faille possde une faible permabilit. Les rsultats utilisant une combinaison des deux conditions suggrent que le dveloppement potentiel de fissures peut tre grand sur ou proximit du plan de faille et que la dformation horizontale joue vraisemblablement un rle cl dans ce dveloppement. Resumen. Se conoce la contribucin que la deformacin horizontal causada por el bombeo de sistemas acuferos confinados tienen en el desarrollo de fisuras en regiones semiridas, como es el caso del Valle de Las Vegas (Nevada, Estados Unidos de Amrica). A pesar de la estabilizacin de los niveles, se contina desarrollando nuevas fisuras, mientras las ya existentes se alargan y ensanchan cerca de las fallas de relleno de cuenca. Se ha utilizado un modelo tridimensional de desplazamiento granular basado en la teora de consolidacin de Biot (Biot, M.A., 1941. General theory of three-dimensional consolidation. J. Applied Physics, 12: 155-164) para evaluar la naturaleza del desplazamiento junto a dos fallas verticales. Se ha simulado cada falla como (1) una barrera de baja permeabilidad al flujo horizontal, (2) un hueco o ruptura estructural en el medio pero sin obstruccin al flujo de aguas subterrneas, y (3) una combinacin de las dos condiciones anteriores. Los res

Burbey, Thomas



El acelerado incremento en las ltimas dcadas de impactos ambientales negati-vos como la destruccin y fragmentacin de ambientes naturales, la contamina-  

E-print Network

volumen; Trejo, este volumen). La selva seca es considerada uno de los ecosiste- mas tropicales más en la Península de Yucatán (Ceballos, 1995; García, 2006; Miles et al., 2006; Trejo, este volumen (García, 2006; Trejo-Vázquez y Dirzo, 2000). En las tierras bajas del Pacifico las selvas en

Nacional Autónoma de México, Universidad


Laser Remote Measurements of atmospheric pollutants (Las-R-Map): UV-Visible Laser system description and data processing  

NASA Astrophysics Data System (ADS)

Laser radar more popularly known as LIDAR LIght Detection And Ranging is becoming one of the most powerful techniques for active remote sensing of the earth s atmosphere Around the globe several new lidar systems have been developed based on the scientific interest Particularly the DIfferential Absorption Lidar DIAL technique is only one which can provide the better accuracy of measuring atmospheric pollutants Using modern advanced techniques and instrumentation a mobile DIAL system called laser remote measurements of atmospheric pollutants hear after referred as Las-R-Map is designed at National Laser Centre NLC --Pretoria 25 r 45 prime S 28 r 17 prime E Las-R-Map is basically used for measuring atmospheric pollutants applying the principle of absorption by constituents The system designed primarily to focus on the following pollutant measurements such as SO 2 CH 4 CO 2 NO 2 and O 3 In future the system could be used to measure few particulate matter between 2 5 mu m and 10 mu m Benzene Hg 1 3-butadiene H 2 S HF and Volatile Organic Compounds VOC Las-R-map comprises of two different laser sources Alexandrite and CO 2 optical receiver data acquisition and signal processor It uses alexandrite laser in the UV-Visible region from 200 nm to 800 nm and CO 2 laser in the Far-IR region from 9 2 mu m to 10 8 mu m Such two different laser sources make feasibility for studying the wide range of atmospheric pollutants The present paper is focused on technical details

Sivakumar, V.; Wyk, H. V.


Long-term assessment of the oil spill at Bahia Las Minas, Panama. Interim report. Volume 1: Executive summary  

SciTech Connect

On April 27, 1986, at least 8 million liters of medium-weight crude oil spilled from a ruptured storage tank into the Bahia Las Minas on the Caribbean Coast of Panama. Coral reefs, seagrass communities, and mangroves were affected. The area of the spill was also the location of the Smithsonian Tropical Research Institute's Galeta Laboratory where resident and visiting scientists have been studying the ecology of the Bahia Las Minas and the adjacent areas for over 15 years. Because this was a unique opportunity to assess the immediate biological effects following a major spill in the Caribbean region and to monitor the subsequent recovery, the U.S. Department of the Interior Minerals Management Service supported a 5-year environmental study. The objectives of the study are to identify any long-term changes in the marine environment that may have resulted from the spill and to understand the ecological processes causing such changes. This is the first report from the study and addresses the effects observed during the first two years of the effort.

Keller, B.D.; Jackson, J.B.C.



Long-term assessment of the oil spill at Bahia Las Minas, Panama. Interim report. Volume 2: Technical report  

SciTech Connect

On April 27, 1986, at least 8 million liters of medium-weight crude oil spilled from a ruptured storage tank into the Bahia Las Minas on the Caribbean Coast of Panama. Coral reefs, seagrass communities, and mangroves were affected. The area of the spill was also the location of the Smithsonian Tropical Research Institute's Galeta Laboratory where resident and visiting scientists have been studying the ecology of the Bahia Las Minas and the adjacent areas for over 15 years. Because this was a unique opportunity to assess the immediate biological effects following a major spill in the Caribbean region and to monitor the subsequent recovery, the U.S. Department of the Interior Minerals Management Service supported a 5-year environmental study. The objectives of the study are to identify any long-term changes in the marine environment that may have resulted from the spill and to understand the ecological processes causing such changes. This is the first report from the study and addresses the effects observed during the first two years of the effort.

Keller, B.D.; Jackson, J.B.C.



Pseudomonas aeruginosa las and rhl quorum-sensing systems are important for infection and inflammation in a rat prostatitis model.  


Pseudomonas aeruginosa frequently acts as an opportunistic pathogen of mucosal surfaces; yet, despite causing aggressive prostatitis in some men, its role as a pathogen in the prostate has not been investigated. Consequently, we developed a Ps. aeruginosa infection model in the rat prostate by instilling wild-type (WT) Ps. aeruginosa strain PAO1 into the rat prostate. It was found that Ps. aeruginosa produced acute and chronic infections in this mucosal tissue as determined by bacterial colonization, gross morphology, tissue damage and inflammatory markers. WT strain PAO1 and its isogenic mutant PAO-JP2, in which both the lasI and rhlI quorum-sensing signal systems have been silenced, were compared during both acute and chronic prostate infections. In acute infections, bacterial numbers and inflammatory markers were comparable between WT PA01 and PAO-JP2; however, considerably less tissue damage occurred in infections with PAO-JP2. Chronic infections with PAO-JP2 resulted in reduced bacterial colonization, tissue damage and inflammation as compared to WT PAO1 infections. Therefore, the quorum-sensing lasI and rhlI genes in Ps. aeruginosa affect acute prostate infections, but play a considerably more important role in maintaining chronic infections. We have thus developed a highly reproducible model for the study of Ps. aeruginosa virulence in the prostate. PMID:19460822

Nelson, Lisa K; D'Amours, Genevieve H; Sproule-Willoughby, Kimberley M; Morck, Douglas W; Ceri, Howard



Morphology, body proportions, and postcranial hypertrophy of a female Neandertal from the Sima de las Palomas, southeastern Spain  

PubMed Central

Considerations of Neandertal geographical variation have been hampered by the dearth of remains from Mediterranean Europe and the absence there of sufficiently complete associated postcrania. The 2006 and 2007 excavation of an articulated partial skeleton of a small adult female Neandertal at the Sima de las Palomas, Murcia, southeastern Spain (Sima de las Palomas 96) provides substantial and secure information on body proportions among southern European Neandertals, as well as further documenting the nature of Neandertal biology in southern Iberia. The remains exhibit a suite of cranial, mandibular, dental, and postcranial features, of both Neandertals and archaic Homo generally, that distinguish them from contemporary and subsequent early modern humans. Its lower limbs exhibit the robustness of later Pleistocene Homo generally, and its upper limbs conform to the pattern of elevated robustness of the Neandertals. Its body proportions, including relative clavicular length, distal limb segment lengths, and body mass to stature indicators, conform to the cold-adapted pattern of more northern Neandertals. Palomas 96 therefore documents the presence of a suite of Neandertal characteristics in southern Iberia and, along with its small body size, the more Arctic body proportions of other European Neandertals despite the warmer climate of southern Iberia during marine isotope stage 3. PMID:21646528

Walker, Michael J.; Ortega, Jon; Parmov, Klara; Lpez, Mariano V.; Trinkaus, Erik



2LAs, 3LAs, and the enterprise  

SciTech Connect

This article is about new things that engineers, facility managers and automation system operators need to learn about and understand when it comes to integrating information throughout an enterprise. The goal is to help one better understand the connection between building systems and building intelligence. The authors set the foundation with an overview of the latest concept in network communications, enterprise computing. Because any new technology spawns a number of acronyms, they`ll also investigate new two-, three-, four- and five-letter acronyms that directly affect the changing role of the building automation system (BAS) as it becomes an integral, contributing part of the business. In each case, one or more Internet URLs will be provided for more information.

Hoffmann, T.



Aerosol Light Absorption and Scattering at Four Sites in and Near Mexico City: Comparison with Las Vegas, Nevada, USA  

NASA Astrophysics Data System (ADS)

Four photoacoustic spectrometers (PAS) for aerosol light scattering and absorption measurements were deployed in and near Mexico City in March 2006 as part of the Megacity Impacts on Regional and Global Environments (MIRAGE). The four sites included: an urban site at Instituto Mexicano del Petroleo (Mexican Oil Institute, denoted by IMP); a suburban site at the Technological University of Tecamac; a rural site at "La Biznaga" ranch; and a site at the Paseo de Cortes (altitude 3,810 meters ASL) in the rural area above Amecameca in the State of Mexico, on the saddle between the volcanoes Popocatepetl and Iztaccihuatl. A similar campaign was held in Las Vegas, Nevada, USA in January-February, 2003. The IMP site gave in-situ characterization of the Mexico City plume under favorable wind conditions while the other sites provided characterization of the plume, mixed in with any local sources. The second and third sites are north of Mexico City, and the fourth site is south. The PAS used at IMP operates at 532 nm, and conveniently allowed for characterization of gaseous absorption at this wavelength as well. Instruments at the second and third sites operate at 870 nm, and the one at the fourth site at 780 nm. Light scattering measurements are accomplished within the PAS by the reciprocal nephelometery method. In the urban site the aerosol absorption coefficient typically varies between 20 and 180 Mm-1 during the course of the day and significant diurnal variation of the aerosol single scattering albedo was observed probably as a consequence of secondary aerosol formation. Comparisons with TSI nephelometer scattering at the T0 site will be presented. We will present the diurnal variation of the scattering and absorption as well as the single scattering albedo and fraction of absorption due to gases at the IMP site and compare with Las Vegas diurnal variation. Mexico City 'breaths' more during the course of the day than Las Vegas, Nevada in part because the latitude of Mexico City resulted in more direct solar radiation. Further insight on the meteorological connections will be discussed.

Arnott, W. P.; Miranda, G. P.; Gaffney, J. S.; Marley, N. A.



Mecanismo(s) de Acci³n de las Auxinas y los Herbicidas Aux­nicos - Parte 1- Introducci³n  

NSDL National Science Digital Library

Descripci³n:El control selectivo de malezas de hoja ancha en cultivos de cereales utilizando herbicidas aux­nicos ha hecho de ©stos una de las familias de herbicidas actualmente en uso m¡s ampliamente distribuidas e importantes. Estos herbicidas fueron los primeros herbicidas org¡nicos desarrollados que presentaron selectividad; es decir, capaces de matar un cierto grupo de plantas sin afectar a otros grupos (por ejemplo: matar plantas de hoja ancha pero no las de hoja angosta; en este documento se utilizar¡ el t©rmino "gram­neas" para referirse a las plantas de hoja angosta o cereales). En esta lecci³n se presentar¡n las principales caracter­sticas de los herbicidas aux­nicos, se discutir¡n sus principales usos y se describir¡n los s­ntomas de da±o que causan. De igual forma, se indicar¡ la forma en que estos herbicidas matan a las plantas sensibles.


FourStar: The Near-Infrared Imager for the 6.5m Baade Telescope at Las Campanas Observatory  

NASA Astrophysics Data System (ADS)

The FourStar Infrared Camera is a 4 K4 K near-infrared (1.0-2.4 ?m) imager built for the Magellan 6.5 m Baade Telescope at Las Campanas Observatory, Chile. FourStar has an all-refractive optical system, four HAWAII-2RG detectors, and Teledyne electronics. The pixel scale of 0.159? pixel produces a 10.8'10.8' field of view. Ten filters are available across the Y, J, H, and K bands. We present the optical, mechanical, thermal, electronic, and software design choices and their associated engineering implementations. The detector readout electronics, control system, and the automatic data acquisition hardware are also described. Laboratory and on-sky performance data are presented. FourStar has excellent image quality, easily meeting the requirement of critically sampling the median seeing disk. The throughput is ?0.5-0.6 across its wavelength coverage. Some early science results are presented.

Persson, S. E.; Murphy, D. C.; Smee, S.; Birk, C.; Monson, A. J.; Uomoto, A.; Koch, E.; Shectman, S.; Barkhouser, R.; Orndorff, J.; Hammond, R.; Harding, A.; Scharfstein, G.; Kelson, D.; Marshall, J.; McCarthy, P. J.



Spatial Statistics of the Clark County Parcel Map, Trial Geotechnical Models, and Effects on Ground Motions in Las Vegas Valley  

NASA Astrophysics Data System (ADS)

When deterministically modeling the propagation of seismic waves, shallow shear-wave velocity plays a crucial role in predicting shaking effects such as peak ground velocity (PGV). The Clark County Parcel Map provides us with a data set of geotechnical velocities in Las Vegas Valley, at an unprecedented level of detail. Las Vegas Valley is a basin with similar geologic properties to some areas of Southern California. We analyze elementary spatial statistical properties of the Parcel Map, along with calculating its spatial variability. We then investigate these spatial statistics from the PGV results computed from two geotechnical models that incorporate the Parcel Map as parameters. Plotting a histogram of the Parcel Map 30-meter depth-averaged shear velocity (Vs30) values shows the data to approximately fit a bimodal normal distribution with ?1 = 400 m/s, ?1 = 76 m/s, ?2 = 790 m/s, ?2 = 149 m/s, and p = 0.49., where ? is the mean, ? is standard deviation, and p is the probability mixing factor for the bimodal distribution. Based on plots of spatial power spectra, the Parcel Map appears to be fractal over the second and third decades, in kilometers. The spatial spectra possess the same fractal dimension in the N-S and the E-W directions, indicating isotropic scale invariance. We configured finite-difference wave propagation models at 0.5 Hz with LLNL's E3D code, utilizing the Parcel Map as input parameters to compute a PGV data set from a scenario earthquake (Black Hills M6.5). The resulting PGV is fractal over the same spatial frequencies as the Vs30 data sets associated with their respective models. The fractal dimension is systematically lower in all of the PGV maps as opposed to the Vs30 maps, showing that the PGV maps are richer in higher spatial frequencies. This is potentially caused by a lens focusing effects on seismic waves due to spatial heterogeneity in site conditions.

Savran, W. H.; Louie, J. N.; Pullammanappallil, S.; Pancha, A.



El Informe Anual a la Nacin indica que las tasas de mortalidad por cncer continan declinando: los avances en el tratamiento del cncer varan segn el tipo de cncer

Las organizaciones oncolgicas principales de la nacin informan que el riesgo de los estadounidenses de morir de cncer sigue disminuyendo y que las tasas de casos nuevos de cncer permanecen estables. El Informe Anual a la Nacin sobre el Estado del Cncer, de 1975 a 2002, seala que las tasas de mortalidad de cncer que se observaron para todos los cnceres combinados disminuyeron 1,1 por ciento por ao de 1993 a 2002.


Exploring the effects of population growth on future land use change in the Las Vegas Wash watershed: an integrated approach of geospatial modeling and analytics  

EPA Science Inventory

The Las Vegas Valley metropolitan area is one of the fastest growing areas in the southwestern United States. The rapid urbanization has led to many environmental problems. For instance, as population growth and urbanization continue, there will be a problem with water shortage. ...


La esgrima es tan antigua como el hombre. Desde los primeros adiestramientos de soldados para su supervivencia en las culturas antiguas hasta en nuestros das un  

E-print Network

para su supervivencia en las culturas antiguas hasta en nuestros días un deporte completo y divertido. La esgrima es un deporte orientado a cualquier edad. Completo al usarse todo el cuerpo. Se centra en principiantes como en los más avanzados. Aunque sea un deporte que se practica individualmente, se entrena en

Escolano, Francisco



E-print Network

THE LAS CAMPANAS INFRARED SURVEY. III. THE H-BAND IMAGING SURVEY AND THE NEAR-INFRARED AND OPTICAL on broadband optical and near-infrared photometry, is designed to robustly identify a statistically significant-reduction techniques, and object identification procedures. We present sam- ple near-infrared and optical photometric

Goddard III, William A.


Full House: The Las Vegas building boom has stretched the creativity and resources of the fastest-growing school district in the nation. Edutopia, September/October 2004  

ERIC Educational Resources Information Center

This once sleepy community, founded by Mormon missionaries in 1855 and jumpstarted by gambling 85 years later, now gobbles up real estate faster than a conventioneer chowing down at a midnight buffet. Every day of the week, two acres of Las Vegas area land are developed for commercial or residential use in a frenetic drive to accommodate the

Furger, Roberta



Instituciones al Servicio de los Hispanos estn a la vanguardia de la investigacin de las desigualdades en salud por cncer en la comunidad latina

Varias Instituciones al Servicio de los Hispanos forman parte de un grupo de escuelas profesionales y universidades que se han asociado con el Instituto Nacional del Cncer (NCI) y cierto nmero de centros oncolgicos regionales para abordar el tema de las desigualdades en salud por cncer que afectan a la comunidad latina.



EPA Science Inventory

This report contains the papers presented at the Second Conference on Environmental Quality Sensors, held at the U.S. Environmental Protection Agency's National Environmental Research Center, Las Vegas, Nevada, on October 10 and 11, 1973. The papers covered such topics as: aircra...


El primer examen de las Pruebas de Acceso a la Universidad en la UA se centra en un texto sobre Torrente de Santiago Segura  

E-print Network

Torrente de Santiago Segura Alicante, 9 de junio de 2011 "Torrente y la clase política". Con este artículo, Torrente, la clase política actual en España y la o las crisis que vive el país, ha sido el escogido para

Escolano, Francisco


Comments on the article "relative h-index to compare the scientific performance of researchers" by L.A.S. Dias.  


The relative h-index, proposed by L.A.S. Dias, is not useful to compare the scientific performance of researchers. This is shown by examples. More adequate alternatives include the g-index and the R-index. PMID:23913381

Egghe, L



Integrating NASA's Land Analysis System (LAS) image processing software with an appropriate Geographic Information System (GIS): A review of candidates in the public domain  

NASA Technical Reports Server (NTRS)

A user requirements analysis (URA) was undertaken to determine and appropriate public domain Geographic Information System (GIS) software package for potential integration with NASA's LAS (Land Analysis System) 5.0 image processing system. The necessity for a public domain system was underscored due to the perceived need for source code access and flexibility in tailoring the GIS system to the needs of a heterogenous group of end-users, and to specific constraints imposed by LAS and its user interface, Transportable Applications Executive (TAE). Subsequently, a review was conducted of a variety of public domain GIS candidates, including GRASS 3.0, MOSS, IEMIS, and two university-based packages, IDRISI and KBGIS. The review method was a modified version of the GIS evaluation process, development by the Federal Interagency Coordinating Committee on Digital Cartography. One IEMIS-derivative product, the ALBE (AirLand Battlefield Environment) GIS, emerged as the most promising candidate for integration with LAS. IEMIS (Integrated Emergency Management Information System) was developed by the Federal Emergency Management Agency (FEMA). ALBE GIS is currently under development at the Pacific Northwest Laboratory under contract with the U.S. Army Corps of Engineers' Engineering Topographic Laboratory (ETL). Accordingly, recommendations are offered with respect to a potential LAS/ALBE GIS linkage and with respect to further system enhancements, including coordination with the development of the Spatial Analysis and Modeling System (SAMS) GIS in Goddard's IDM (Intelligent Data Management) developments in Goddard's National Space Science Data Center.

Rochon, Gilbert L.



Long-term continuous measurement of near-road air pollution in Las Vegas: Seasonal variability in traffic emissions impact on local air quality  

EPA Science Inventory

Excess air pollution along roadways is an issue of public health concern and motivated a long-term measurement effort established by the U.S. Environmental Protection Agency in Las Vegas, Nevada. Measurements of air pollutants ? including black carbon (BC), carbon monoxide (CO),...


Lnea de base del Proyecto de produccin ecolgica, comercializacin y asociatividad de las mujeres en el medio rural: Manual del sistema de monitoreo y seguimiento  

Microsoft Academic Search

El Sistema de monitoreo y seguimiento ha sido elaborado especialmente para la organizacin En las Huellas del Banco Grameen-Loja, cuyo propsito es facilitar el acceso a servicios financieros y tcnicos eficientes y sostenibles para mujeres microempresarias del sur ecuatoriano. El manual fue diseado como un instrumento que sirva de gua para que la direccin ejecutiva y la coordinacin del Proyecto

Carlos Paln Tamayo



Las estadsticas Oficiales de Turismo: principales lagunas en el contexto nacional e internacional \\/Official Statistics of Tourism: Major Gaps in the National and International Context  

Microsoft Academic Search

En el mbito de las estadsticas de turismo se han producido notables desarrollos en los ltimos aos, tanto por parte del sector pblico como del privado. El actual sistema de estadsticas oficiales de turismo en Espaa se puede considerar como uno de los ms desarrollados en el contexto internacional pero todava persisten importantes lagunas de informacin. La comparabilidad de resultados




Influencia del talento del empresario y del tipo de pgina web en los resultados empresariales para las casas de turismo rural en Espaa  

Microsoft Academic Search

El Turismo rural ha alcanzado un auge muy fuerte en Espaa e internet se ha convertido en una herramienta vital en el sector. En este trabajo se persigue: 1) analizar la importancia del talento del empresario en la implantacin de pginas web; 2) examinar la influencia de este talento y de las caractersticas de la pgina web sobre los resultados

Jannine Waleska; Nieto Arias; Rosa Mara; Hernndez Maestro; Pablo A. Muoz Gallego


Desempleo, inmigracin y su impacto sobre el desempleo en Medelln: Anlisis de las encuestas de calidad de vida-Medelln, 2004-2005  

Microsoft Academic Search

Resumen: este estudio se enfoca en el patrn y en las causas del desempleo en Medelln; en el patrn y la velocidad de inmigracin hacia Medelln y en el impacto de la inmigracin sobre la tasa de desempleo para los aos 2004 y 2005. El estudio se realiza con base en el anlisis de la Encuesta de Calidad de Vida

Donald J. Robbins



Propuesta metodolgica para la evaluacin del impacto de la contaminacin de las cuencas hdricas del pas: Estudio de caso del ro La vieja  

Microsoft Academic Search

El presente estudio estuvo enfocado en la generacin de una metodologa general dirigida a cuantificar el impacto socioeconmico de la contaminacin de las cuencas hdricas tomando como caso particular la Cuenca del Ro La Vieja y a la poblacin de Cartago (Valle del Cauca). Los tpicos desarrollados en este trabajo de investigacin se pueden resumir en los siguientes aspectos: En

Alfredo SARMIENTO; Darwin Marcelo GORDILLO; Juan Miguel VILLA




Microsoft Academic Search

Resumen: Los valores inmersos dentro del proceso de enseanza-aprendizaje, pernean el ambiente educativo y el quehacer escolar, sin que exista explcitamente dentro de un plan de estudios qu tipo de valores deben de abordarse, adems de que stos son empleados de acuerdo a las circunstancias del entorno escolar y facilitan la formacin humanista del sujeto, ste, a travs de la



Vicedecanato de Relaciones Internacionales y Movilidad (VRIM) El Vicedecanato de Relaciones Internacionales y Movilidad (VRIM) gestiona las acciones de movilidad y  

E-print Network

Vicedecanato de Relaciones Internacionales y Movilidad (VRIM) El Vicedecanato de Relaciones Internacionales y Movilidad (VRIM) gestiona las acciones de movilidad y programas propios de docencia China en el marco del Programa Propio de Movilidad de la Facultad, nos presenta un video clip realizado

Escolano, Francisco


Reproductive Responses of Common Carp Cyprinus carpio in Cages to Influent of the Las Vegas Wash in Lake Mead, Nevada, from late Winter to early Spring  

EPA Science Inventory

To investigate the potential for contaminants in Las Vegas Wash (LW) influent to produce effects indicative of endocrine disruption in vivo, adult male and female common carp were exposed in cages for 42-48 d at four sites and two reference locations in Lake Mead....


Licenciatura en Ciencias de la Tierra Las Ciencias de la Tierra son un conjunto de disciplinas cuyo objetivo es el estudio del Planeta Tierra, y  

E-print Network

Licenciatura en Ciencias de la Tierra Las Ciencias de la Tierra son un conjunto de disciplinas cuyo ciencias fundamentales como la Física, Química, Biología, Matemáticas para entender cuantitativamente cómo ciencias de la Tierra en la enorme tarea conjunta de prevenir, en la medida de lo posible, sus efectos o

Islas, León


School Resegregation in the Mississippi of the West: Community Counternarratives on the Return to Neighborhood Schools in Las Vegas, 1968-1994  

ERIC Educational Resources Information Center

Background: School desegregation and resegregation in the Mountain West remain understudied despite the substantial impact the region's growth and demographic change have had on racial balance and diversity in schools. Home to the largest school district in the Mountain West and fifth largest school district in the country, Las Vegas's

Horsford, Sonya Douglass; Sampson, Carrie; Forletta, Felicia



Spatial Statistics of the Clark County Parcel Map, Trial Geotechnical Models, and Effects on Earthquake Ground Motions in Las Vegas Valley  

E-print Network

. Motivation and Objectives. In Southern California, seven years of effort to measure shallow (300 m depth on Earthquake Ground Motions in Las Vegas Valley William Savran, John N. Louie, Brady Flinchum Nevada at a spacing of approximately 300 meters, to an average depth of resolution of 50 meters. The data set is used


Hydrology With Unmanned Aerial Vehicles (UAVs) Albert Rango, USDA-ARS-Jornada Experimental Range, Las Cruces, NM (  

E-print Network

, Las Cruces, NM ( Enrique Vivoni, School of Earth and Space Exploration & School of Test Sites Characteristics of the Jornada UAVs Products Available From UAV Data Hydrological remote soil types. The Jornada also has a NOAA Climate and Reference Network (CRN) station and at least 3


Ceremonial Hestiatoreion at the hill-top sanctuary of Apollo MalcaLas. Asklepieion is a word derived from the name of Aesculapius, the Greek  

E-print Network

of Apollo MalcaLas. Asklepieion is a word derived from the name of Aesculapius, the Greek god of medicine throughout the Greek world by persons seeking the heaJing powers of the physician. Temples '--'--' were Exewtive Council Kirk Hevener President Frances Kirkland Medicine Marie Hatten All

Cui, Yan


Modelos tericos que nos ayudan a comprender el gobierno de las sociedades cooperativas, una apuesta por el enfoque de los stakeholders  

Microsoft Academic Search

En la actualidad, el entorno competitivo es cada vez ms incierto y complejo. Las caractersticas de los mercados actuales hacen que sea cada vez ms difcil conseguir una ventaja competitiva sostenible en el tiempo para la empresa, por lo que hay que innovar en formas de gestin y de gobierno para ser competitivo. De esta manera, se est produciendo un

Cristina Pedrosa Ortega



Estudio comparativo de las molculas isovalentes de inters atmosfrico CF3Cl y CF3Br y sus correspondientes halgenos aislados Cl y Br.  

NASA Astrophysics Data System (ADS)

Los estados Rydberg moleculares han suscitado en los ltimos aos un creciente inters entre los espectroscopistas experimentales, motivado en parte por el desarrollo de nuevas tcnicas espectroscpicas capaces de investigar estos estados altamente excitados electrnicamente. Los procesos de fotoabsorcin que implican estados Rydberg en los derivados halogenados del metano son de gran importancia, debido a su abundancia en la atmsfera y a sus implicaciones medioambientales. Por ello, la obtencin de datos relativos a sus fuerzas de oscilador es de gran inters. En este trabajo se aborda el estudio de dichas propiedades para las molculas isovalentes CF3Cl y CF3Br. Ambas molculas presentan idntica estructura electrnica para el estado fundamental por lo que se espera que sus espectros Rydberg presenten grandes similitudes, en ausencia de perturbaciones. Por ello y dada la escasez de datos relativos a fuerzas de oscilador, hemos establecido la correccin de nuestros resultados en base a las analogas esperadas en las intensidades espectrales correspondientes a transiciones anlogas. Por otro lado, Novak y col. [1] han encontrado experimentalmente un marcado carcter atmico en el espectro correspondiente a estas molculas, siendo muy similar a los de los tomos de Cl y Br. Por ello en el presente trabajo, adems de establecer la comparacin entre ambas molculas hemos buscado las similitudes con sus respectivos halgenos. Los clculos relativos a las especies moleculares se han realizado utilizando la Metodologa Molcular de Orbtales de Defecto Cuntico (MQDO) [2], mientras que para el estudio de los tomos de Cl y Br se emple la versin relativista del mtodo (RQDO) [3].

Mayor, E.; Velasco, A. M.; Martn, I.; Lavn, C.


Environmental and social determinants of youth physical activity intensity levels at neighborhood parks in Las Vegas, NV.  


Parks can play an important role in youth activity. This study used observational data to evaluate the relationship of environmental and social determinants to youth physical activity intensity levels in Las Vegas neighborhood parks. System for observing play and leisure activity in youth was used to code activity levels as sedentary, walking, or vigorous in five low-income and five high-income parks. Environmental determinants included amenities, incivilities, size, high-speed streets, sidewalk condition, and temperature. Social determinants included percent minority and Hispanic, gender, and income. A multinomial logistic regression model was performed. We observed 1,421 youth, 59% male, 41% female; 21% were sedentary, 38% walking, and 41% vigorous. Males were more likely to be observed walking (OR 1.42) and vigorous (OR 2.21) when compared to sedentary. High-speed streets (OR 0.76), sidewalks condition (OR 0.34), and low-income neighborhoods (OR 0.07) was associated with decreased odds of vigorous activity; incivilities (OR 1.34) and amenities (OR 1.27) were associated with greater odds of being vigorous. Environmental and social determinants are associated with physical activity intensity levels at parks. Stakeholders should ensure quality parks, as they relate to physical activity levels in youth. Understanding environmental and social determinants that influence physical activity at parks is critical to utilizing their full potential in an effort to combat childhood obesity. PMID:24610562

Coughenour, Courtney; Coker, Lisa; Bungum, Tim J



Analysis of the real estate market in Las Vegas: Bubble, seasonal patterns, and prediction of the CSW indexes  

E-print Network

We analyze 27 house price indexes of Las Vegas from Jun. 1983 to Mar. 2005, corresponding to 27 different zip codes. These analyses confirm the existence of a real-estate bubble, defined as a price acceleration faster than exponential, which is found however to be confined to a rather limited time interval in the recent past from approximately 2003 to mid-2004 and has progressively transformed into a more normal growth rate comparable to pre-bubble levels in 2005. There has been no bubble till 2002 except for a medium-sized surge in 1990. In addition, we have identified a strong yearly periodicity which provides a good potential for fine-tuned prediction from month to month. A monthly monitoring using a model that we have developed could confirm, by testing the intra-year structure, if indeed the market has returned to ``normal'' or if more turbulence is expected ahead. We predict the evolution of the indexes one year ahead, which is validated with new data up to Sep. 2006. The present analysis demonstrates t...

Zhou, Wei-Xing



Fast emplacement of extensive pahoehoe flow-fields: the case of the 1736 flows from Montaa de las Nueces, Lanzarote  

NASA Astrophysics Data System (ADS)

The 1730-36 Timanfaya eruption on Lanzarote, in the Canary Islands, is the second largest historical effusion on record. During its final stages, in 1736, the eruption produced the Montaa de las Nueces flow-field, consisting of sheets of pahoehoe lava that, within 4 weeks, had covered 32 km 2 and reached a maximum length of almost 21 km. The tholeiitic lavas have pahoehoe surface features, but internal structures that are normally associated with massive aa flows, suggesting that their fronts advanced as single units rather than as a collection of budding pahoehoe tongues. Volume conservation and a simple model of crustal failure suggest that the main flows advanced at about 0.02 ms -1 over the prevailing slopes of 1. The rates of advance are (1) consistent with emplacement near the transition from pahoehoe to aa, and (2) about an order of magnitude greater than would have been expected by analogy with Hawaiian pahoehoe flow-fields of similar dimensions. Surface texture and morphology, therefore, is an insufficient guide for constraining the rate and style of pahoehoe emplacement, and a flow's internal structure must be established before its characteristics are used to infer eruption conditions and potential hazard.

Solana, M. C.; Kilburn, C. R. J.; Rodriguez Badiola, E.; Aparicio, A.



Pedostratigraphy and pedological and geochemical characterization of Las Carreras loess paleosol sequence, Valle de Taf, NW-Argentina  

NASA Astrophysics Data System (ADS)

The Las Carreras loess-paleosol sequence is considered the most complete Quaternary pedostratigraphic record in South America. It consists of 32 paleosols formed during the past 1.15 Ma. Chronological control is provided by magnetostratigraphy. Sediment and paleosol characterization is based on a variety of methods, including soil chemistry, geochemistry, and micromorphology. The main pedogenic processes identified are carbonate leaching and reprecipitation, ped formation, and translocation of clay and organic matter. In many cases, the boundaries between individual paleosols are not clearly defined due to indistinct transitional zones. Based on both pedological and sedimentological characteristics the sequence was subdivided into three units, with paleosols in Units I and III designated as Luvisols and paleosols in Unit II tentatively classified as (Luvic) Kastanozems. This subdivision reflects environmental changes associated with the mid-Pleistocene transition. Overall geochemical variability is low and largely related to pedogenesis. The homogeneity suggests a rather constant provenance that seems to be linked to the Central Andes pursuant to the Chaco Model of Iriondo [1997. Models of deposition of loess and loessoids in the Upper Quaternary of South America. Journal of South American Earth Sciences 10, 71-79], and includes direct volcanic ash falls and local sources in a subordinate manner. In a paleoclimatic context, loess-paleosol alternation is interpreted to reflect climatic cycles that were primarily caused by the variability of the South American Monsoon System.

Schellenberger, Andreas; Veit, Heinz



Fichas de las especies  

Microsoft Academic Search

Sittasomus griseicapillus, Xiphorhynchus flavigaster, Myiopagis viridicata, Mitrephanes phaeocercus, \\u000aEmpidonax difficilis \\/ occidentalis, Myiarchus tuberculifer, Myiarchus cinerascens, Myiarchus nuttingi, Myiarchus tyrannulus, Pitangus sulphuratus, Myiozetetes similis, Myiodynastes luteiventris, Pachyramphus aglaiae, Vireo brevipennis, Vireo bellii, Vireo nelsoni, Vireo hypochryseus, \\u000aVireo gilvus, Vireo flavoviridis, Thryothorus sinaloa, Thryothorus felix, Troglodytes brunneicollis, Troglodytes aedon, Henicorhina leucophrys, Polioptila caerulea, Myadestes occidentalis, Catharus aurantiirostris, Catharus occidentalis, Catharus frantzii,

Santi Guallar; E. Santana; S. Contreras; H. Verdugo; A. Galls



224. Toda cosa tiene un lado bueno y otro malo: aprende a buscarlos. Toma todo por el lado conveniente. Nunca en forma rabiosa, aunque venga as. Todas las cosas tienen un derecho y  

E-print Network

conveniente. Nunca en forma rabiosa, aunque venga así. Todas las cosas tienen un derecho y un revés. De modo. En palabras de Gracián, todas las cosas tienen un derecho y un revés y los fracasos temporales en la

Muiño, Ricardo Díez


Fault interaction along the Central Andean thrust front: The Las Peas thrust, Cerro Salinas thrust and the Montecito Anticline  

NASA Astrophysics Data System (ADS)

The region in west-central Argentina between the thin-skinned Precordillera and the thick-skinned Sierras Pampeanas structural domain is among the most active zones of thrust tectonics in the world. We quantify the rates of deformation on the east-vergent Las Peas thrust (LPT), and the west-vergent Cerro Salinas thrust (CST). The Montecito anticline (MA) is located at their intersection. We mapped three key locations, collected stratigraphic logs from the MA, dated three ashes using U-Pb in zircon and dated 10 terraces using cosmogenic Be-10 depth profiles. Five terrace levels are present where the Rio Las Peas crosses the LPT, up to 45 m above the modern river. Cosmogenic dating of the uppermost terrace (T1) yields and age of 123.8 +26.5/-12.3 ka. A reconstruction of this surface using a blind thrust rupture scenario indicates 73 +/- 7 m horizontal shortening and 34 +/- 3 m vertical displacement. Shortening across the structure is therefore 0.59 +0.10/-0.13 mm/yr with a vertical uplift rate of 0.27 +0.05/-0.06 mm/a. Previous work indicates higher rates to the south on the order of 2 mm/yr (Schmidt et al., 2011). Lower terraces give ages of 38.0 +11/-6.2 ka (T2) and 1.5 +5.0/-0.6 ka (T4). Three terrace levels are preserved near the center of the CST. The middle surface (T2) is folded across the axis of the structure and yields an age of 112.5 +33/-14.4 ka. Given 22.9 m surface uplift, this indicates a vertical uplift rate of 0.20 +0.05/-0.06 mm/yr, similar to the rate on the LPT. The upper terrace (T1) yields a younger age (97.1 +29.8/-12.4 ka); the T1 and T2 ages overlap within uncertainty, indicating rapid river incision at the time of their formation. An intercalated ash within the Neogene strata gives an age of 16.2 +/- 0.2. Previous work indicates long-term shortening rates of 0.8 mm/yr (Verges et al., 2007) and that the CST initiated after 8.5 Ma. The lowermost unit exposed in the MA is the Los Pozos Fm., with no indication of syn-depositional deformation. An intercalated ash from the top of this formation yields an age of 5.76 +/- 0.09 Ma. Internal unconformities are present within the overlying transitional unit and the Mogotes Fm., indicating deformation post-dates 5.8 Ma in the MA. An ash within the Mogotes Fm. is 1.52 +/- 0.06 Ma. Slip is modeled as 3.5 km reverse slip across an east-dipping dislocation with a 45 degree dip. This suggests horizontal shortening and vertical uplift of 0.42 mm/yr since the onset of deformation. Uplifted terraces near the center of the MA are 4.7 +0.8/-0.3 ka (T2) and 1.9 +3.4/-1.9 ka (T3), 6 and 4.6 m above the modern river, respectively. This suggests recent vertical uplift or incision rates of 1.3-2.4 mm/yr. These data suggest that deformation in the MA is comparable to that at the LPT and CST. Deformation in the MA could be accelerating, but alternatively, river incision could be accelerating due to climate change.

Schoenbohm, L. M.; Costa, C. H.; Brooks, B. A.; Bohon, W.; Gardini, C.; Cisneros, H.



Hydrologic, water-quality, and biological assessment of Laguna de las Salinas, Ponce, Puerto Rico, January 2003-September 2004  

USGS Publications Warehouse

The Laguna de Las Salinas is a shallow, 35-hectare, hypersaline lagoon (depth less than 1 meter) in the municipio of Ponce, located on the southern coastal plain of Puerto Rico. Hydrologic, water-quality, and biological data in the lagoon were collected between January 2003 and September 2004 to establish baseline conditions. During the study period, rainfall was about 1,130 millimeters, with much of the rain recorded during three distinct intense events. The lagoon is connected to the sea by a shallow, narrow channel. Subtle tidal changes, combined with low rainfall and high evaporation rates, kept the lagoon at salinities above that of the sea throughout most of the study. Water-quality properties measured on-site (temperature, pH, dissolved oxygen, specific conductance, and Secchi disk transparency) exhibited temporal rather than spatial variations and distribution. Although all physical parameters were in compliance with current regulatory standards for Puerto Rico, hyperthermic and hypoxic conditions were recorded during isolated occasions. Nutrient concentrations were relatively low and in compliance with current regulatory standards (less than 5.0 and 1.0 milligrams per liter for total nitrogen and total phosphorus, respectively). The average total nitrogen concentration was 1.9 milligrams per liter and the average total phosphorus concentration was 0.4 milligram per liter. Total organic carbon concentrations ranged from 12.0 to 19.0 milligrams per liter. Chlorophyll a was the predominant form of photosynthetic pigment in the water. The average chlorophyll a concentration was 13.4 micrograms per liter. Chlorophyll b was detected (detection limits 0.10 microgram per liter) only twice during the study. About 90 percent of the primary productivity in the Laguna de Las Salinas was generated by periphyton such as algal mats and macrophytes such as seagrasses. Of the average net productivity of 13.6 grams of oxygen per cubic meter per day derived from the diel study, the periphyton and macrophyes produced 12.3 grams per cubic meter per day; about 1.3 grams (about 10 percent) were produced by the phytoplankton (plant and algae component of plankton). The total respiration rate was 59.2 grams of oxygen per cubic meter per day. The respiration rate ascribed to the plankton (all organisms floating through the water column) averaged about 6.2 grams of oxygen per cubic meter per day (about 10 percent), whereas the respiration rate by all other organisms averaged 53.0 grams of oxygen per cubic meter per day (about 90 percent). Plankton gross productivity was 7.5 grams per cubic meter per day; the gross productivity of the entire community averaged 72.8 grams per cubic meter per day. Fecal coliform bacteria counts were generally less than 200 colonies per 100 milliliters; the highest concentration was 600 colonies per 100 milliliters.

Soler-Lpez, Luis R.; Gmez-Gmez, Fernando; Rodrguez-Martnez, Jess



Sr Isotopes and Migration of Prairie Mammoths (Mammuthus columbi) from Laguna de las Cruces, San Luis Potosi, Mexico  

NASA Astrophysics Data System (ADS)

Asserting mobility of ancient humans is a major issue for anthropologists. For more than 25 years, Sr isotopes have been used as a resourceful tracer tool in this context. A comparison of the 87Sr/86Sr ratios found in tooth enamel and in bone is performed to determine if the human skeletal remains belonged to a local or a migrant. Sr in bone approximately reflects the isotopic composition of the geological region where the person lived before death; whereas the Sr isotopic system in tooth enamel is thought to remain as a closed system and thus conserves the isotope ratio acquired during childhood. Sr isotope ratios are obtained through the geologic substrate and its overlying soil, from where an individual got hold of food and water; these ratios are in turn incorporated into the dentition and skeleton during tissue formation. In previous studies from Teotihuacan, Mexico we have shown that a three-step leaching procedure on tooth enamel samples is important to assure that only the biogenic Sr isotope contribution is analyzed. The same Sr isotopic tools can function concerning ancient animal migration patterns. To determine or to discard the mobility of prairie mammoths (Mammuthus columbi) found at Laguna de las Cruces, San Luis Potosi, Mxico the leaching procedure was applied on six molar samples from several fossil remains. The initial hypothesis was to use 87Sr/86Sr values to verify if the mammoth population was a mixture of individuals from various herds and further by comparing their Sr isotopic composition with that of plants and soils, to confirm their geographic origin. The dissimilar Sr results point to two distinct mammoth groups. The mammoth population from Laguna de Cruces was then not a family unit because it was composed by individuals originated from different localities. Only one individual was identified as local. Others could have walked as much as 100 km to find food and water sources.

Solis-Pichardo, G.; Perez-Crespo, V.; Schaaf, P. E.; Arroyo-Cabrales, J.



Geologic and geophysical maps of the Las Vegas 30' x 60' quadrangle, Clark and Nye counties, Nevada, and Inyo County, California  

USGS Publications Warehouse

Las Vegas and Pahrump are two of the fastest growing cities in the US, and the shortage of water looms as among the greatest future problems for these cities. These new maps of the Las Vegas 30 x 60-minute quadrangle provide a geologic and geophysical framework and fundamental earth science database needed to address societal issues such as ground water supply and contamination, surface flood, landslide, and seismic hazards, and soil properties and their changing impact by and on urbanization. The mountain ranges surrounding Las Vegas and Pahrump consist of Mesozoic, Paleozoic and Proterozoic rocks. A majority of these rocks are Paleozoic carbonate rocks that are part of Nevada's carbonate rock aquifer province. The Spring Mountains represent a major recharge site in the province, where maximum altitude is 3,632 m (Charleston Peak) above sea level. Rocks in the Sheep and Las Vegas Ranges and Spring Mountains contain correlative, northeast-striking, southeast-verging thrust faults that are part of the Cretaceous, Sevier orogenic belt. These thrusts were offset during the Miocene by the Las Vegas Valley shear system (LVVSZ). We conducted new mapping in the Blue Diamond area, highlighting refined work on the Bird Spring thrust, newly studied ancient landslides, and gravity-slide blocks. We conducted new mapping in the Las Vegas Range and mapped previously unrecognized structures such as the Valley thrust and fold belt; recognition of these structures has led to a refined correlation of Mesozoic thrust faults across the LVVSZ. New contributions in the quadrangle also include a greatly refined stratigraphy of Paleozoic bedrock units based on conodont biostragraphy. We collected over 200 conodont samples in the quadrangle and established stratigraphic reference sections used to correlate units across the major Mesozoic thrust faults. Quaternary deposits cover about half of the map area and underlie most of the present urbanized area. Deposits consist of large coalescing alluvial fans that grade downslope to extensive areas of fine-grained sediment indicative of groundwater-discharge during the Pleistocene. In the central areas of Las Vegas and Pahrump valleys, Quaternary fault scarps associated with past ground-water discharge deposits suggest a genetic relationship. In collaboration with NBMG and University of Nevada, a variety of ages of gravelly alluvium are newly mapped using surficial characteristics and soil development, along with reassessment of previously published mapping during compilation. Reconnaissance geochronology (thermoluminescence and U-series) of eolian and authigenic components of surficial and buried soils and spring deposits is applied to test hypotheses of geomorphic and hydrologic response to climate change over the past 100 k.y.). The major structure in the Las Vegas quadrangle is the LVVSZ. Because the LVVSZ is concealed by thick basin-fill deposits of Quaternary and Tertiary age, it was characterized primarily based on geophysics. Likewise, the newly described State line fault system in Pahrump Valley has also been characterized by geophysics, where geophysically inferred structures correlate remarkably with surface structures defined by our new geologic mapping in the Mound Spring and Hidden Hills Ranch 7.5-minute quadrangles.

Page, William R.; Lundstrom, Scott C.; Harris, Anita G.; Langenheim, Victoria E.; Workman, Jeremiah B.; Mahan, Shannon A.; Paces, James B.; Dixon, Gary L.; Rowley, Peter D.; Burchfiel, B.C.; Bell, John W.; Smith, Eugene I.



Toxicity of a Novel Herbomineral Preparation Las01 on Human Cancer Cell Lines and Its Safety Profile in Humans and Animals  

PubMed Central

Polyhedral formulations based on Rasayana therapy described in Charaka Samhita showed remarkable improvement in quality of life of various cancer patients who have been found to be refractory or poor responders to modern chemotherapy and radiation treatment. One of the most recent novel herbomineral preparation, Las01 prepared absolutely as per the instruction given in the ancient Ayurvedic literature has been found to be effective as a potent anticancer drug in the human cell lines, the MCF-7 and Hela cancer cell lines. This novel preparation of Las01 is also found to be devoid of toxicity both in animals as well as in human subjects, which is the main drawback of chemotherapeutic agents used in modern system of medicine. Our results warrant multicentric clinical trials on a large scale which seems to be a future promising drug to cure incurables cancer patients. PMID:22969832

Sheikh, Saba; Srivastava, Ashok; Tripathi, Rajesh; Tripathi, Shalini; Trivedi, V. P.; Saxena, R. C.



Eruption and magma crystallization ages of Las Tres Vrgenes (Baja California) constrained by combined 230Th\\/ 238U and (UTh)\\/He dating of zircon  

Microsoft Academic Search

Las Tres Vrgenes volcano is a calc-alkaline composite cone located near the main Gulf of California escarpment on the E coast of the Baja California peninsula. High-sensitivity ion microprobe U-series (230Th\\/238U) ages for zircon from La Vrgen tephra average 121?10+12ka (1?; MSWD=2.7), with discrete age peaks at ?100 and 160ka. The noble gas mass spectrometric (UTh)\\/He zircon age, corrected for

Axel K. Schmitt; Daniel F. Stockli; Brian P. Hausback




E-print Network

. Relatividad General Cuántica. Aplicación de los Métodos Ab initio al Estudio de Sistemas Moleculares de en general poco familiarizados. La presentación de las líneas de investigación se realiza mediante Teóricas y Física Molecular. - Charla sobre vías de acceso a la carrera científica. Discusión general


American Recovery and Reinvestment Act (ARRA) FEMP Technical Assistance Federal Aviation Administration Project 209 - Control Tower and Support Building, Las Vegas, NV  

SciTech Connect

This report represents findings of a design review team that evaluated construction documents (at the 70% level) and operating specifications for a new control tower and support building that will be built in Las Vegas, Nevada by the Federal Aviation Administration (FAA). The focus of the review was to identify measures that could be incorporated into the final design and operating specification that would result in additional energy savings for the FAA that would not have otherwise occurred.

Arends, J.; Sandusky, William F.



Estudiar Ciencias Fsicas permite entender la estructura de las leyes de la Fsica y tomar parte en el descubrimiento de nuevos  

E-print Network

#12;· Estudiar Ciencias Físicas permite entender la estructura de las leyes de la Física y tomar conocimiento científico y tecnológico multidisciplinario. Ciencias Físicas UdeC Descripción de la Carrera #12 en Ciencias Físicas Título Profesional Al Sexto año y de acuerdo a la especialidad elegida, conduce

Pérez, Carlos E.


Highlights of the Central Receiver Pilot Plant and Test Facility projects. Semi-annual Review, 17--19 November 1975, Las Vegas, NV  

Microsoft Academic Search

The highlights of the ERDA Solar Thermal Branch Semi-annual Review held in Las Vegas, Nevada, on November 17--19, 1975, are presented. The review covered the status and plans for the Central Receiver Pilot Plant and Test Facility projects. Preliminary design efforts by five contractor teams are discussed. These contractors include Honeywell, Incorporated, Martin Marietta Corporation, McDonnell Douglas Astronautics Company, Boeing




Specific determination of linear Alkylbenzenesulfonates (LAS) in commercial detergents and whole blood by high-performance liquid chromatography with solid-phase extraction.  


This paper presents the extraction and analysis of linear alkylbenzenesulfonates (LAS) from whole blood using solid-phase extraction (SPE) together with high-performance liquid chromatography (HPLC). The sample was buffered with extraction solution and purified with Bakerbond C(18) SPE columns. The columns were washed, dried, and eluted with experimental optimized solvent systems. HPLC was performed using a Wakopak) WS AS-Aqua column (4.6 * 250-mm) and monitored at 228 nm using a UV detector. A mobile phase consisting of acetonitrile/water (60:40, v/v) and containing 1.2% (w/v) of sodium perchlorate was employed. Good separation was achieved for the five homologues of LAS (C(10) approximately C(14)) eluted at 6.85 and 13.79 min. The linearity range for this analysis was found to be from 10.0 to 100.0 ng/g and the limit of detection was 4.0-5.0 ng/g in blood for each homologue. The recovery of each homologue in blood ranged from 76 to 107%. The LAS in commercial detergents could be extracted and the homologues of C(10) approximately C(13) were detected. Blood samples of rats, which were administered a commercial detergent orally, were determined by the present method, and C(14) was used as an internal standard. The method was simple and reliable for the determination of LAS in blood samples and could be expected to apply to the forensic and clinical specimens. PMID:17389082

Xue, Yuying; Hieda, Yoko; Fujihara, Junko; Takayama, Koji; Takeshita, Haruo



Analysis of impacts of urban land use and land cover on air quality in the Las Vegas region using remote sensing information and ground observations  

USGS Publications Warehouse

Urban development in the Las Vegas Valley of Nevada (USA) has expanded rapidly over the past 50 years. The air quality in the valley has suffered owing to increases from anthropogenic emissions of carbon monoxide, ozone and criteria pollutants of particular matter. Air quality observations show that pollutant concentrations have apparent heterogeneous characteristics in the urban area. Quantified urban land use and land cover information derived from satellite remote sensing data indicate an apparent local influence of urban development density on air pollutant distributions. Multi-year observational data collected by a network of local air monitoring stations specify that ozone maximums develop in the May and June timeframe, whereas minimum concentrations generally occur from November to February. The fine particulate matter maximum occurs in July. Ozone concentrations are highest on the west and northwest sides of the valley. Night-time ozone reduction contributes to the heterogeneous features of the spatial distribution for average ozone levels in the Las Vegas metropolitan area. Decreased ozone levels associated with increased urban development density suggest that the highest ozone and lowest nitrogen oxides concentrations are associated with medium to low density urban development in Las Vegas.

Xian, G.



New 40Ar/39Ar isotopic dates from Miocene volcanic rocks in the Lake Mead area and southern Las Vegas Range, Nevada  

USGS Publications Warehouse

New 40Ar/39Ar dates on volcanic rocks interlayered with synextensional Miocene sedimentary rocks in the western Lake Mead area and southern end of the Las Vegas Range provide tight constraints on magmatism, basin formation, and extensional deformation in the Basin and Range province of southern Nevada. Vertical axis rotations associated with movement along the Las Vegas Valley shear zone occurred after 15.67??0.10 Ma (2??), based on a 40Ar/39Ar date from a tuff in the Gass Peak formation in the southern Las Vegas Range. Basaltic magmatism in the western Lake Mead area began as early as 13.28??0.09 Ma, based on a date from a basalt flow in the Lovell Wash Member of the Horse Spring Formation. Isotopic dating of a basalt from the volcanic rocks of Callville Mesa indicates that these rocks are as old as 11.41??0.14 Ma, suggesting that volcanic activity began shortly after formation of the Boulder basin, the extensional basin in which the informally named red sandstone unit was deposited. The red sandstone unit is at least as old as 11.70??0.08 Ma and contains megabreccia deposits younger than 12.93??0.10 Ma. This results shows that formation of the Boulder basin was associated with development of topographic relief that was probably generated by movement along the Saddle Island low-angle normal fault. Stratal tilting associated with extension occurred both prior to and after 11.5 Ma.

Harlan, S.S.; Duebendorfer, E.M.; Deibert, J.E.



Variation in soil organic carbon abundance and isotopic composition mediated by landslide activity in the Sierra de Las Minas, Guatemala  

NASA Astrophysics Data System (ADS)

Tropical mountains play an important role in biogeochemical cycles worldwide due to complex interaction between geomorphic and ecosystem processes. The strength of these interactions, however, is likely to vary along the steep environmental gradients found in mountainous terrain. Here we focus on soil organic carbon and ask how landsliding alters soil organic carbon density, C:N ratios and ?13C and ?15N along the broad climatic gradients observed in the Sierra de Las Minas (SLM) of eastern Guatemala. Soils were sampled in intact forest and 14 year-old landside sites underlain by gneiss in the southern dry to mesic (Motagua) and northern wet (Polochic) aspects of the SLM along wide elevation, temperature, and precipitation gradients. Soils samples (10 cm depth increments down to 30 cm) from each site were processed to estimate soil bulk density and obtain total carbon and nitrogen, and ?13C and ?15N. Soil organic carbon density exhibited a greater variability in forests of the Motagua (10-170 MgC ha-1) than the Polochic (40-160 MgC ha-1) whereas the opposite was true in landslides (5-40 MgC ha-1 versus10-90 MgC ha-1 in the Motagua and Polochic, respectively). Soil organic carbon density was related non-linearly with mean annual temperature (MAT) and mean total annual precipitation (MAP) but the strength and sign of the interactions differed with aspect and habitats which suggests that landsliding has different potentials to mobilize and fix carbon along the complex environmental gradients of the SLM. Similarly, the C:N ratios and ?13C and ?15N values varied between forests and landslides of the Motagua and Polochic sides of the SLM suggesting important differences in the carbon cycle and thus functioning of montane ecosystems mediated by landslide activity. Results of our work are critical both for characterizing the size of soil organic carbon stocks and pinpointing the source of carbon mobilized by landsliding in the SLM.

Restrepo, C.



Two Enzymes of a Complete Degradation Pathway for Linear Alkylbenzenesulfonate (LAS) Surfactants: 4-Sulfoacetophenone Baeyer-Villiger Monooxygenase and 4-Sulfophenylacetate Esterase in Comamonas testosteroni KF-1  

PubMed Central

Complete biodegradation of the surfactant linear alkylbenzenesulfonate (LAS) is accomplished by complex bacterial communities in two steps. First, all LAS congeners are degraded into about 50 sulfophenylcarboxylates (SPC), one of which is 3-(4-sulfophenyl)butyrate (3-C4-SPC). Second, these SPCs are mineralized. 3-C4-SPC is mineralized by Comamonas testosteroni KF-1 in a process involving 4-sulfoacetophenone (SAP) as a metabolite and an unknown inducible Baeyer-Villiger monooxygenase (BVMO) to yield 4-sulfophenyl acetate (SPAc) from SAP (SAPMO enzyme); hydrolysis of SPAc to 4-sulfophenol and acetate is catalyzed by an unknown inducible esterase (SPAc esterase). Transcriptional analysis showed that one of four candidate genes for BVMOs in the genome of strain KF-1, as well as an SPAc esterase candidate gene directly upstream, was inducibly transcribed during growth with 3-C4-SPC. The same genes were identified by enzyme purification and peptide fingerprinting-mass spectrometry when SAPMO was enriched and SPAc esterase purified to homogeneity by protein chromatography. Heterologously overproduced pure SAPMO converted SAP to SPAc and was active with phenylacetone and 4-hydroxyacetophenone but not with cyclohexanone and progesterone. SAPMO showed the highest sequence homology to the archetypal phenylacetone BVMO (57%), followed by steroid BVMO (55%) and 4-hydroxyacetophenone BVMO (30%). Finally, the two pure enzymes added sequentially, SAPMO with NADPH and SAP, and then SPAc esterase, catalyzed the conversion of SAP via SPAc to 4-sulfophenol and acetate in a 1:1:1:1 molar ratio. Hence, the first two enzymes of a complete LAS degradation pathway were identified, giving evidence for the recruitment of members of the very versatile type I BVMO and carboxylester hydrolase enzyme families for the utilization of a xenobiotic compound by bacteria. PMID:23001656

Weiss, Michael; Denger, Karin; Huhn, Thomas



Effects of illegal harvest of eggs on the population decline of leatherback turtles in Las Baulas Marine National Park, Costa Rica.  


Within 19 years the nesting population of leatherback turtles (Dermochelys coriacea) at Parque Nacional Marino Las Baulas declined from 1500 turtles nesting per year to about 100. We analyzed the effects of fishery bycatch and illegal harvesting (poaching) of eggs on this population. We modeled the population response to different levels of egg harvest (90, 75, 50, and 25%) and the effect of eradicating poaching at different times during the population decline. We compared effects of 90% poaching with those of 20% adult mortality because both of these processes were present in the population at Las Baulas. There was a stepwise decline in number of nesting turtles at all levels of egg harvest. Extirpation times for different levels of poaching ranged from 45 to 282 years. The nesting population declined more slowly and survived longer with 20% adult mortality (146 years) than it did with 90% poaching (45 years). Time that elapsed until poaching stopped determined the average population size at which the population stabilized, ranging from 90 to 420 nesting turtles. Our model predicted that saving clutches lost naturally would restore the population when adult mortality rates were low and would contribute more to population recovery when there were short remigration intervals between nesting seasons and a large proportion of natural loss of clutches. Because the model indicated that poaching was the most important cause of the leatherback decline at Las Baulas, protecting nests on the beach and protecting the beach from development are critical for survival of this population. Nevertheless, the model predicted that current high mortality rates of adults will prevent population recovery. Therefore, protection of the beach habitat and nests must be continued and fishery bycatch must be reduced to save this population. PMID:18637915

Tomillo, Pilar Santidrin; Saba, Vincent S; Piedra, Rotney; Paladino, Frank V; Spotila, James R



Evapotranspiration of Mixed Shrub Communities in Phreatophytic Zones of the Great Basin D.A. Devitt1, L.K. Fenstermaker2, M. Young2, B. Conrad1 and B. Bird1 1 School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 2 Desert Research Institute, Las Vegas, NV  

NASA Astrophysics Data System (ADS)

Water limitations in the arid and semiarid regions of the southwestern United States have led many water managers of municipalities to begin the process of diversifying their water resource portfolios. Las Vegas in particular, is pursuing groundwater exportation from east central basins in Nevada. Estimating evapotranspiration (ET) is a critical component to closing hydrologic balances in these basins. As such, ET was estimated for three valleys in the Great Basin Region of Nevada (USA) during a three year period. ET estimates were made based on an energy balance approach using the eddy covariance method. ET estimates at the basin scale were made by developing empirical relationships between ET and remotely sensed spectral data (Landsat). Groundwater, soil moisture, rainfall and leaf level measurements were used to validate the differences in ET estimates based on site, year and basin. When the ET correlations were based on average NDVI values during the growing period and incorporated previously published values attained for the same valleys during the same time period, we could account for 97% of the variation in the ET estimate for the May 10 to September 5 growing period and 93% of the variation in the ET estimates based on measured or projected yearly ET totals. Variations in yearly ET estimates at the different shrub and grassland sites ranged from 20 to 50 cm during the two dry years (2006, 2007, not including the irrigated site). The amount of winter precipitation was shown to be a significant driving force in the physiological response of the plants and the yearly ET totals. In the case of White River Valley the ratio of winter precipitation to reference evapotranspiration declined from 79% to 11% over the 3 year monitoring period. Such changes led to a direct impact on leaf xylem water potential values of greasewood (Sarcobatus vermiculatus). During the two drier years (2006 and 2007) greasewood plants entered into the growing period with lower mid day levels of ?L reflecting the significant step down in the ratio of winter precipitation to reference evapotranspiration. ET rates in 2007 were highly correlated with the percent cover of greasewood at the monitoring sites (R2=0.96***), regardless of the depth to groundwater. In 2006 both sites which were monitored for an entire 12 month period, ET was shown to exceed precipitation by 55 to 60%. Although a certain amount of uncertainty must be attached to the basin level ET estimates, results suggested that all three basins had annual ET totals in the 150 to 300 million m3 range, with a significant decline from the wetter 2005 year to the drier 2007 year (30 to 47% decline).The utility of the equations generated in this study will need to be further tested over time to capture the intra and inter annual variability in ET at these sites and basins before long term hydrologic balances can be properly assessed.

Devitt, D. A.; Fenstermaker, L. K.; Young, M.; Conrad, B.; Bird, B.



Some properties of lithium aluminium silicate (LAS) glass-ceramics used in glass-ceramic to metal compressive seal for vacuum applications  

Microsoft Academic Search

We report here the preparation of LAS glass-ceramics and some studies on their thermo-physical properties and microstructure, for compressive seals in vacuum applications. Glass of composition 12.6Li2O-71.7SiO2-5.1Al2O3-4.9K2O-3.2B2O3-2.5P2O5 was prepared by the conventional melt quench technique. Based on differential thermal analysis (DTA) data, glass samples were nucleated at 600C for 2hr and were then crystallized at 800C for 2-5hr. X-ray diffraction

A. Ananthanarayanan; R. Kumar; S. Bhattacharya; V. K. Shrikhande; G. P. Kothiyal



High-level nuclear waste transport and storage assessment of potential impacts on tourism in the Las Vegas area. Nevada Nuclear Waste Storage Investigations Project  

SciTech Connect

The literature review and empirical analyses presented in this report were undertaken, for the most part, between August and October 1983. They are not comprehensive. No primary data were gathered, nor were any formal surveys conducted. Additionally, because construction of a repository at Yucca Mountain, if that site is selected for a repository, is not scheduled to begin until 1993, engineering design and planned physical appearance of the repository are very preliminary. Therefore, specific design features or visual appearance were not addressed in the analyses. Finally, because actual transportation routes have not been designated, impacts on tourism generated specifically by transportation activities are not considered separately. Chapter 2 briefly discusses possible means by which a repository could impact tourism in the Las Vegas area. Chapter 3 presents a review of previous research on alternative methods for predicting the response of people to potential hazards. A review of several published studies where these methods have been applied to facilities and activities associated with radioactive materials is included in Chapter 3. Chapter 4 contains five case studies of tourism impacts associated with past events that were perceived by the public to represent safety hazards. These perceptions of safety hazards were evidenced by news media coverage. These case studies were conducted specifically for this report. Conclusions of this preliminary analysis regarding the potential impact on tourism in the Las Vegas area of a repository at Yucca Mountain are in Chapter 5. Recommendations for further research are contained in Chapter 6.




The bHLH protein ROX acts in concert with RAX1 and LAS to modulate axillary meristem formation in Arabidopsis.  


During post-embryonic shoot development, new meristems are initiated in the axils of leaves. They produce secondary axes of growth that determine morphological plasticity and reproductive efficiency in higher plants. In this study, we describe the role of the bHLH-protein-encoding Arabidopsis gene REGULATOR OF AXILLARY MERISTEM FORMATION (ROX), which is the ortholog of the branching regulators LAX PANICLE1 (LAX1) in rice and barren stalk1 (ba1) in maize. rox mutants display compromised axillary bud formation during vegetative shoot development, and combination of rox mutants with mutations in RAX1 and LAS, two key regulators of axillary meristem initiation, enhances their branching defects. In contrast to lax1 and ba1, flower development is unaffected in rox mutants. Over-expression of ROX leads to formation of accessory side shoots. ROX mRNA accumulates at the adaxial boundary of leaf and flower primordia. However, in the vegetative phase, axillary meristems initiate after ROX expression has terminated, suggesting an indirect role for ROX in meristem formation. During vegetative development, ROX expression is dependent on RAX1 and LAS activity, and all three genes act in concert to modulate axillary meristem formation. PMID:22372440

Yang, Fang; Wang, Quan; Schmitz, Gregor; Mller, Drte; Theres, Klaus



Comparing the suitability of geophysical methods in the study of a cave in marbles: A case study of Gruta de las Maravillas (Aracena, Southwest Spain)  

NASA Astrophysics Data System (ADS)

Different geophysical methods have been applied to determine the geometry of caves, considering the host rock, depth, dimension, presence of water and other parameters. The Gruta de las Maravillas cave is located in marbles interlayered with gneiss, quartzite and granodiorite along the suture between South Portuguese and Ossa Morena zone. This cave is probably formed as a consequence of the presence of pyrite and iron oxides mineralization that interacted with the surrounding marble host rocks. In order to analyze the continuity of the Gruta de las Maravillas cave (Aracena, southwest Spain) geophysical methods has been used on the known cave in order to check their suitability. These results allow investigating the prolongation of the cave in surrounding areas, performing a comprehensive study of the Cerro del Castillo hill containing the cavity. Microtopography with differential GPS and cave topography with an accuracy of 0.01 m were measured. The first geophysical method employed were a regional microgravity, with and SCINTREX CG-5 gravimeter that reaches an accuracy up to 0.001 mGal. In the obtained residual anomaly map, negative values are associated with negative density contrast, which are related to the known cave position. In addition, residual gravity minima suggest the presence of other unknown cavities. The anomalies attributed to possible new shallow and deep caves have been studied in a second step with the application of other eight detailed geophysical methods along profiles to test the response of each of them to the presence of cavities: microgravity, magnetic, electrical resistivity tomography, induced polarization, seismic P-waves velocity tomography, ray tracing coverage, common offset and ground-penetrating radar. Moreover, the known cave has walls covered with iron oxides that determine magnetic anomaly minima and intermediate resistivity values (~2000 ohm.m) on the ERT profiles versus the host marble rocks (~45000 ohm.m). After a detailed comparison of each method, the best results are obtained by microgravity and ray tracing coverage. Other methods allow to support and precise the cave geometry obtained. The possible continuity of the known Gruta de las Maravillas cave is proposed after this detailed study, practically doubling the extent of present day know cave.

Jos Martnez Moreno, Francisco; Galindo Zaldvar, Jess; Pedrera Parias, Antonio; Ullod, Teresa Teixid i.; Ruano Roca, Patricia; Pea Ruano, Jose Antonio; Gonzlez Castillo, Lourdes; Ruiz Constan, Ana; Lpez Chicano, Manuel; Martn Rosales, Wenceslao



Postwildfire preliminary debris flow hazard assessment for the area burned by the 2011 Las Conchas Fire in north-central New Mexico  

USGS Publications Warehouse

The Las Conchas Fire during the summer of 2011 was the largest in recorded history for the state of New Mexico, burning 634 square kilometers in the Jemez Mountains of north-central New Mexico. The burned landscape is now at risk of damage from postwildfire erosion, such as that caused by debris flows and flash floods. This report presents a preliminary hazard assessment of the debris-flow potential from 321 basins burned by the Las Conchas Fire. A pair of empirical hazard-assessment models developed using data from recently burned basins throughout the intermountain western United States was used to estimate the probability of debris-flow occurrence and volume of debris flows at the outlets of selected drainage basins within the burned area. The models incorporate measures of burn severity, topography, soils, and storm rainfall to estimate the probability and volume of debris flows following the fire. In response to a design storm of 28.0 millimeters of rain in 30 minutes (10-year recurrence interval), the probabilities of debris flows estimated for basins burned by the Las Conchas Fire were greater than 80 percent for two-thirds (67 percent) of the modeled basins. Basins with a high (greater than 80 percent) probability of debris-flow occurrence were concentrated in tributaries to Santa Clara and Rio del Oso Canyons in the northeastern part of the burned area; some steep areas in the Valles Caldera National Preserve, Los Alamos, and Guaje Canyons in the east-central part of the burned area; tributaries to Peralta, Colle, Bland, and Cochiti canyons in the southwestern part of the burned area; and tributaries to Frijoles, Alamo, and Capulin Canyons in the southeastern part of the burned area (within Bandelier National Monument). Estimated debris-flow volumes ranged from 400 cubic meters to greater than 72,000 cubic meters. The largest volumes (greater than 40,000 cubic meters) were estimated for basins in Santa Clara, Los Alamos, and Water Canyons, and for two basins at the northeast edge of the burned area tributary to Rio del Oso and Vallecitos Creek. The Combined Relative Debris-Flow Hazard Rankings identify the areas of highest probability of the largest debris flows. Basins with high Combined Relative Debris-Flow Hazard Rankings include upper Santa Clara Canyon in the northern section of the burn scar, and portions of Peralta, Colle, Bland, Cochiti, Capulin, Alamo, and Frijoles Canyons in the southern section of the burn scar. Three basins with high Combined Relative Debris-Flow Hazard Rankings also occur in areas upstream from the city of Los Alamosthe city is home to and surrounded by numerous technical sites for the Los Alamos National Laboratory. Potential debris flows in the burned area could affect the water supply for Santa Clara Pueblo and several recreational lakes, as well as recreational and archeological resources in Bandelier National Monument. Debris flows could damage bridges and culverts along State Highway 501 and other roadways. Additional assessment is necessary to determine if the estimated volume of material is sufficient to travel into areas downstream from the modeled basins along the valley floors, where they could affect human life, property, agriculture, and infrastructure in those areas. Additionally, further investigation is needed to assess the potential for debris flows to affect structures at or downstream from basin outlets and to increase the threat of flooding downstream by damaging or blocking flood mitigation structures. The maps presented here may be used to prioritize areas where erosion mitigation or other protective measures may be necessary within a 2- to 3-year window of vulnerability following the Las Conchas Fire.

Tillery, Anne C.; Darr, Michael J.; Cannon, Susan H.; Michael, John A.



Environmental and geochemical record of human-induced changes in C storage during the last millennium in a temperate wetland (Las Tablas de Daimiel National Park, central Spain)  

USGS Publications Warehouse

Las Tablas de Daimiel National Park has experienced many hydrological and ecological modifications through out its history, both of natural as well as anthropogenic origin, which have affected its carbon storage capacity and carbon fluxes. The study of those variations has been carried out by the analysis of its sedimentary record (geochemistry and pollen) and historical data. The natural changes have a wider variation range than the anthropogenic ones, show repetitive patterns and the system reacts readjusting the equilibrium among its components. Anthropogenic effects depend on the direct or indirect impact on the wetlands of change and its intensity. In addition, the anthropogenic impacts have the capacity of breaking the natural balance of the ecosystem and the internal interactions. ?? 2006 The Authors Journal compilation ?? 2006 Blackwell Munksgaard.

Dominguez-Castro, F.; Santisteban, J.I.; Mediavilla, R.; Dean, W.E.; Lopez-Pamo, E.; Gil-Garcia, M. J.; Ruiz-Zapata, M. B.



The Tangled Branches (Las Ramas Enredadas): Sexual Risk, Substance Abuse, and Intimate Partner Violence Among Hispanic Men who Have Sex with Men  

PubMed Central

Hispanic men who have sex with men (MSM) experience a number of health disparities including high rates of HIV infection from high risk sex, substance abuse, and intimate partner violence. Although some research is available to document the relationships of these health disparities in the literature, few studies have explored the intersection of these disparities and the factors that influence them. The purpose of this study was to explore the experiences that Hispanic MSM residing in South Florida have with high risk sex, substance abuse, and intimate partner violence. Focus groups were conducted and analyzed using grounded theory methodology until data saturation was reached (n = 20). Two core categories with subcategories emerged from the data: The Roots of Risk (Los raices del riesgo) and The Tangled Branches (Las Ramas Enredadas). The results of the study provided some important clinical implications as well as directions for future research with Hispanic MSM. PMID:24084703

De Santis, Joseph P.; Gonzalez-Guarda, Rosa; Provencio-Vasquez, Elias; Deleon, Diego A.



Estimates of hydraulic properties from a one-dimensional numerical model of vertical aquifer-system deformation, Lorenzi site, Las Vegas, Nevada  

USGS Publications Warehouse

Land subsidence related to aquifer-system compaction and ground-water withdrawals has been occurring in Las Vegas Valley, Nevada, since the 1930's, and by the late 1980's some areas in the valley had subsided more than 5 feet. Since the late 1980's, seasonal artificial-recharge programs have lessened the effects of summertime pumping on aquifer-system compaction, but the long-term trend of compaction continues in places. Since 1994, the U.S. Geological Survey has continuously monitored water-level changes in three piezometers and vertical aquifer-system deformation with a borehole extensometer at the Lorenzi site in Las Vegas, Nevada. A one-dimensional, numerical, ground-water flow model of the aquifer system below the Lorenzi site was developed for the period 1901-2000, to estimate aquitard vertical hydraulic conductivity, aquitard inelastic skeletal specific storage, and aquitard and aquifer elastic skeletal specific storage. Aquifer water-level data were used in the model as the aquifer-system stresses that controlled simulated vertical aquifer-system deformation. Nonlinear-regression methods were used to calibrate the model, utilizing estimated and measured aquifer-system deformation data to minimize a weighted least-squares objective function, and estimate optimal property values. Model results indicate that at the Lorenzi site, aquitard vertical hydraulic conductivity is 3 x 10-6 feet per day, aquitard inelastic skeletal specific storage is 4 x 10-5 per foot, aquitard elastic skeletal specific storage is 5 x 10-6 per foot, and aquifer elastic skeletal specific storage is 3 x 10-7 per foot. Regression statistics indicate that the model and data provided sufficient information to estimate the target properties, the model adequately simulated observed data, and the estimated property values are accurate and unique.

Pavelko, Michael T.



VE-Cadherin Cleavage by LasB Protease from Pseudomonas aeruginosa Facilitates Type III Secretion System Toxicity in Endothelial Cells  

PubMed Central

Infection of the vascular system by Pseudomonas aeruginosa (Pa) occurs during bacterial dissemination in the body or in blood-borne infections. Type 3 secretion system (T3SS) toxins from Pa induce a massive retraction when injected into endothelial cells. Here, we addressed the role of type 2 secretion system (T2SS) effectors in this process. Mutants with an inactive T2SS were much less effective than wild-type strains at inducing cell retraction. Furthermore, secretomes from wild-typeswere sufficient to trigger cell-cell junction opening when applied to cells, while T2SS-inactivated mutants had minimal activity. Intoxication was associated with decreased levels of vascular endothelial (VE)-cadherin, a homophilic adhesive protein located at endothelial cell-cell junctions. During the process, the protein was cleaved in the middle of its extracellular domain (positions 335 and 349). VE-cadherin attrition was T3SS-independent but T2SS-dependent. Interestingly, the epithelial (E)-cadherin was unaffected by T2SS effectors, indicating that this mechanism is specific to endothelial cells. We showed that one of the T2SS effectors, the protease LasB, directly affected VE-cadherin proteolysis, hence promoting cell-cell junction disruption. Furthermore, mouse infection with Pa to induce acute pneumonia lead to significant decreases in lung VE-cadherin levels, whereas the decrease was minimal with T2SS-inactivated or LasB-deleted mutant strains. We conclude that the T2SS plays a pivotal role during Pa infection of the vascular system by breaching the endothelial barrier, and propose a model in which the T2SS and the T3SS cooperate to intoxicate endothelial cells. PMID:24626230

Golovkine, Guillaume; Faudry, Eric; Bouillot, Stphanie; Voulhoux, Rom; Attre, Ina; Huber, Philippe



VE-cadherin cleavage by LasB protease from Pseudomonas aeruginosa facilitates type III secretion system toxicity in endothelial cells.  


Infection of the vascular system by Pseudomonas aeruginosa (Pa) occurs during bacterial dissemination in the body or in blood-borne infections. Type 3 secretion system (T3SS) toxins from Pa induce a massive retraction when injected into endothelial cells. Here, we addressed the role of type 2 secretion system (T2SS) effectors in this process. Mutants with an inactive T2SS were much less effective than wild-type strains at inducing cell retraction. Furthermore, secretomes from wild-types were sufficient to trigger cell-cell junction opening when applied to cells, while T2SS-inactivated mutants had minimal activity. Intoxication was associated with decreased levels of vascular endothelial (VE)-cadherin, a homophilic adhesive protein located at endothelial cell-cell junctions. During the process, the protein was cleaved in the middle of its extracellular domain (positions 335 and 349). VE-cadherin attrition was T3SS-independent but T2SS-dependent. Interestingly, the epithelial (E)-cadherin was unaffected by T2SS effectors, indicating that this mechanism is specific to endothelial cells. We showed that one of the T2SS effectors, the protease LasB, directly affected VE-cadherin proteolysis, hence promoting cell-cell junction disruption. Furthermore, mouse infection with Pa to induce acute pneumonia lead to significant decreases in lung VE-cadherin levels, whereas the decrease was minimal with T2SS-inactivated or LasB-deleted mutant strains. We conclude that the T2SS plays a pivotal role during Pa infection of the vascular system by breaching the endothelial barrier, and propose a model in which the T2SS and the T3SS cooperate to intoxicate endothelial cells. PMID:24626230

Golovkine, Guillaume; Faudry, Eric; Bouillot, Stphanie; Voulhoux, Rom; Attre, Ina; Huber, Philippe



Slope-apron deposition in an ordovician arc-related setting: The Vuelta de Las Tolas Member (Suri Formation), Famatina Basin, northwest Argentina  

USGS Publications Warehouse

The Ordovician Suri Formation is part of the infill of the Famatina Basin of northwest Argentina, which formed in an active setting along the western margin of early Paleozoic Gondwana. The lower part of this formation, the Vuelta de Las Tolas Member, records sedimentation on a slope apron formed in an intra-arc basin situated on a flooded continental arc platform. The coincidence of a thick Arenig-Llanvirn sedimentary succession and volcanic-plutonic arc rocks suggests an extensional or transtensional arc setting, and is consistent with evidence of an extensional regime within the volcanic arc in the northern Puna region. The studied stratigraphic sections consist of volcanic rocks and six sedimentary facies. The facies can be clustered into four facies associations. Association 1, composed of facies A (laminated siltstones and mudstones) and B (massive mudstones and siltstones), is interpreted to have accumulated from silty-muddy high-and low-density turbidity currents and highly fluid, silty debris flows, with subsequent reworking by bottom currents, and to a lesser extent, hemipelagic suspension in an open-slope setting. Facies association 2 is dominated by facies C (current-rippled siltstones) strata. These deposits are interpreted to record overbank sedimentation from fine-grained turbidity currents. Facies E (matrix-supported volcanic breccias) interbedded with andesitic lava units comprises facies association 3. Deposition was contemporaneous with subaqueous volcanic activity, and accumulated from cohesive debris flows in a coarse-grained wedge at the base of slope. Facies association 4 is typified by facies D (vitric fine-grained sandstones and siltstones) and F (channelized and graded volcanic conglomerates and breccias) deposits. These strata commonly display thinning-and fining-upward trends, indicating sedimentation from highly-concentrated volcaniclastic turbidity currents in a channelized system. The general characteristics of these deposits of fresh pyroclastic detritus suggest that their accumulation was contemporaneous with, or post-dated shallow-water or subaereal explosive volcanism. The Vuelta de Las Tolas Member tends to show an overall random facies patterns reflecting the strong influence of non-cyclical episodic processes related to arc volcanism and slope sedimentation. The scarcity of resident ichnofaunas and the presence of thick packages of uniform mudstones suggest deposition under oxygen-depleted conditions in a topographically confined, ponded sub-basin. Interbasinal correlations favor comparison with Middle Arenig slope-apron successions formed in the northern Puna Basin and suggest a southward prolongation of the Arenig volcanic arc.

Mangano, M.G.; Buatois, L.A.




EPA Science Inventory

La meta del ETV es verificar, a travs de una evaluacin de informacin objectiva y de calidad, las caracteristicas del desempeo de tecnologas comerciales ambientales. As el ETV proporciona a los compradores y los licenciadores potenciales una valoracin imparcial y creble d...


Los Presupuestos Generales de Estado para 2007 : diferencias entre el proyecto de presupuestos y los presupuestos aprobados y anlisis de las polticas de gasto gestionadas por el Estado y por la Seguridad Social  

Microsoft Academic Search

Aunque en Espaa los Presupuestos Generales del Estado abarcan un mbito limitado dentro las Administraciones Pblicas,1 tienen una gran importancia pues constituyen el principal instrumento financiero del gobierno para conseguir sus fines de poltica econmica. En general, es conveniente analizar los presupuestos desde diferentes perspectivas. Por una parte, es preciso conocer sus efectos globales sobre la economa en su conjunto,

Valentn Edo Hernndez



La contribucin de las polticas de inversin en capital pblico y humano al crecimiento de la productividad en la UE15\\/The Contribution of Human and Public Capital Policies to Productivity Growth in the 15EU Countries  

Microsoft Academic Search

En este trabajo se analiza la contribucin de las polticas pblicas de inversin en capital pblico y humano al crecimiento de la productividad total de los factores en la UE-15 durante el periodo 1980- 2001. Esta contribucin se estima a travs de la elaboracin de ndices de productividad de Malmquist calculados mediante tcnicas no paramtricas de programacin lineal, que permiten




Sentana Gadea, Eloy Metodologas autrquicas aplicadas al relanzamiento de las polticas de desarrollo local Silvestre Francs, Eva M La Obra Social de Caixa Ontinyent como dinamizadora del desarrollo local en la comarca de laVall  

E-print Network

Sentana Gadea, Eloy Metodologías autárquicas aplicadas al relanzamiento de las políticas de. Yago Martínez, Laura, Gómez Javaloyes, M.; Gisbert, E. y Beltrán S. eGruyere, otra forma de generar Huertos Urbanos: buena praxis en sostenibilidad urbana Martínez Puche, A. et alii La

Escolano, Francisco


Information Adapted From:, Mar. 2007 Los programas educativos de Texas A&M AgriLife Extension Service estn disponibles para todas las personas, sin dis-  

E-print Network

- tinción de raza, color, sexo, discapacidad, religión, edad u origen nacional. ¿Que es Toxoplasmosis? El toxoplasmosis es causado por un parasito que se encuentra en carne cru- da y cocida a medias, productos las manos. Comiendo carne poco cocinado o bebiendo agua contaminada también puede causar toxoplasmosis


Vino, turismo e innovacin: Las Rutas del Vino de Espaa, una estrategia integrada de desarrollo rural\\/Wine, Tourism and Innovation: The Wine Routes of Spain, an Integrated Strategy of Rural Development  

Microsoft Academic Search

La importancia del viedo en la economa agraria a lo largo de la historia es incuestionable. La bsqueda de la calidad de los vinos en un mercado cada vez ms competitivo y globalizado es un objetivo de todas las comarcas vitcolas del mundo. En este contexto, el afn por innovar y ofrecer al consumidor productos ms diversificados y complementarios al





EPA Science Inventory

The Seventh National Ground Water Quality Symposium was held in Las Vegas, Nevada, on September 26-28, 1984. The symposium was dedicated to the memory of Mahdi S. Hantush (1921-1984), a pioneering scientist who specialized in the application of mathematics to solve transient grou...


Informe Anual a la Nacin indica una reduccin en los ndices de incidencia y mortalidad por cncer; una seccin especial revela amplias variaciones en las tendencias del cncer de pulmn en los estados

Un nuevo informe de las principales organizaciones oncolgicas del pas muestra que, por primera vez desde la primera publicacin del informe en 1998, tanto el ndice de incidencia como el de mortalidad para todos los cnceres combinados estn disminuyendo en hombres y mujeres.


The Guyanas = Las Guayanas. America = Las Americas [Series].  

ERIC Educational Resources Information Center

Written for teachers to use with migrant children in elementary grades and to highlight the many Americas, this bilingual English/Spanish social studies resource booklet provides historical and cultural background information on the Guyanas--French Guyana, Surinam, and Guyana. A table of contents indicates the language--Spanish or English--in

Toro, Leonor


Model of hydrological behaviour of the anthropized semiarid wetland of Las Tablas de Daimiel National Park (Spain) based on surface water-groundwater interactions  

NASA Astrophysics Data System (ADS)

Las Tablas de Daimiel National Park (TDNP) in Spain is one of the most important semiarid wetlands of the Mediterranean area. The inversion of the regional groundwater flow, primarily due to overexploitation and inadequate aquifer management, has led to degradation. The system has turned from a groundwater discharge zone into a recharge zone, and has remained mostly dry since the 1980s. High heterogeneity and complexity, enhanced by anthropogenic management action, hampers prediction of the surface-groundwater system response to flooding events. This study analyses these interactions and provides empirical evidence to define a conceptual model of flooding-infiltration-groundwater dynamics through the application of a few simple analysis tools to basic hydrological data. Relevant surface water-groundwater interactions are mainly localized in the left (west) margin of TDNP, as confirmed by the fast responses to flooding observed in the hydrochemic, hydrodynamic and isotopic data. During drying periods, small artificial and/or low-flow natural floods are followed by infiltration of evaporated poor-quality ponding water into saline low-permeability layers. The results allow an improved understanding of the hydrological behaviour essential to support efficient management practices. The relative simplicity of the methodology allows for its application in other similar complex groundwater-linked wetlands where detailed knowledge of local geology is still absent.

Aguilera, H.; Castao, S.; Moreno, L.; Jimnez-Hernndez, M. E.; de la Losa, A.



Multivariate analysis, mass balance techniques, and statistical tests as tools in igneous petrology: application to the Sierra de las Cruces volcanic range (Mexican Volcanic Belt).  


Magmatic processes have usually been identified and evaluated using qualitative or semiquantitative geochemical or isotopic tools based on a restricted number of variables. However, a more complete and quantitative view could be reached applying multivariate analysis, mass balance techniques, and statistical tests. As an example, in this work a statistical and quantitative scheme is applied to analyze the geochemical features for the Sierra de las Cruces (SC) volcanic range (Mexican Volcanic Belt). In this locality, the volcanic activity (3.7 to 0.5?Ma) was dominantly dacitic, but the presence of spheroidal andesitic enclaves and/or diverse disequilibrium features in majority of lavas confirms the operation of magma mixing/mingling. New discriminant-function-based multidimensional diagrams were used to discriminate tectonic setting. Statistical tests of discordancy and significance were applied to evaluate the influence of the subducting Cocos plate, which seems to be rather negligible for the SC magmas in relation to several major and trace elements. A cluster analysis following Ward's linkage rule was carried out to classify the SC volcanic rocks geochemical groups. Finally, two mass-balance schemes were applied for the quantitative evaluation of the proportion of the end-member components (dacitic and andesitic magmas) in the comingled lavas (binary mixtures). PMID:24737994

Velasco-Tapia, Fernando



Colombia. America = Las Americas [Series].  

ERIC Educational Resources Information Center

Written for teachers to use with migrant children in elementary grades to highlight the many Americas, this bilingual English/Spanish social studies resource booklet provides historical and cultural background information on Colombia and features biographies of Colombian leaders and artists. A table of contents indicates the language--Spanish or

Toro, Leonor; Doran, Sandra


Peru. America = Las Americas [Series].  

ERIC Educational Resources Information Center

Intended for elementary teachers to use with migrant students, this bilingual English/Spanish social studies resource booklet provides an encyclopedia-style overview of Peru's history, geography, economy, and culture. Topics included are the people, geographic regions, festivals and celebrations, the economy, natural resources, Lake Titicaca,

Toro, Leonor; Doran, Sandra


Bolivia. America = Las Americas [Series].  

ERIC Educational Resources Information Center

Written for teachers to use with migrant children in elementary grades and to highlight the many Americas, this bilingual English/Spanish social studies resource booklet provides historical and cultural information on Bolivia. A table of contents indicates the language--Spanish or English--in which the topics are written. The quarterly provides an

Toro, Leonor; Avery, Robert S.


La verdad de las mujeres  

Microsoft Academic Search

It is a series of lectures on feminism because of some women students who wanted to know about the history of Ditima (a womens community for philosophical research) and to understand the historical context that gave birth to books like Traer al mundo el mundo [Bringing the World to the World}, by Ditima, my El orden simblico de la madre

Luisa Muraro



Evidencia de las Transiciones Evolucionarias  

NSDL National Science Digital Library

The issue-focused, peer-reviewed article demonstrates that all living organisms share the same family tree. This fact is backed by evidence such as: Archaeopteryx, a missing link between reptiles and birds, mammalian hearing structure, which evolved from reptilian jawbones, the animals of the Galapagos, isolated from the rest of the world, and DNA profiles of life forms, present and past.

Michael Benton (University of Bristol;)



Ecuador. America = Las Americas [Series].  

ERIC Educational Resources Information Center

Designed for elementary teachers to use with migrant students, this bilingual English/Spanish social studies resource booklet provides an encyclopedia-style overview of Ecuador's history, geography, economy, and culture. Topics include the history of Ecuador's flag and coat of arms, geographic regions, food, Quito (the capital), recent wildlife

Toro, Leonor; Doran, Sandra


Cmo sentar las bases de una justicia universal: Creacin de redes internacionales y ejercicio de la responsabilidad penal en el caso de violaciones de los derechos humanos en Chile y El Salvador \\/ Grounding global justice: international networks and domestic human rights accountability in Chile and El Salvador  

Microsoft Academic Search

Para algunos, la detencin en Londres del ex-dictador chileno Augusto Pinochet, en 1998, fue una demostracin paradigmtica de la posible eficacia de las as llamadas redes globales de la sociedad civil para hacer efectiva la responsabilidad penal de ex Jefes de Estado por crmenes contra la humanidad. Sin embargo, el presente artculo cuestiona la eficacia de las acciones que pueden

Cath Collins



A comparison of greenhouse gas emissions and local area pollution of highspeed rail and air travel between Los Angeles and Las Vegas  

NASA Astrophysics Data System (ADS)

Global warming is one of the most discussed global environmental issues in the world today. Global warming is driven by fossil fuel combustion emissions known as Green-house Gases (GHG). One of the major contributors to GHG emissions is the transport sector, emitting approximately 30% of total U.S. CO 2 emissions in 2010. Air travel contributed approximately 3.5% of total U.S. CO2 in 2008. High-speed Rail (HSR) is often touted as cleaner, more sustainable mode of transport than air travel. HSR is one of few modes of transport capable of competing with air travel for short to medium-haul distances. There has been considerable study of GHG emissions of each independently. Research has also been carried out into the economics and competition of these transport modes. However, there has been very limited study of the comparative emissions of each, apart from one study in Europe (Givoni, 2007). The current study was undertaken with the goal of quantifying potential emission savings due to mode substitution from air travel to HSR in the Los Angeles to Las Vegas corridor. This study only considered the emissions which occurred from the combustion of the relevant fuels, either in power plants or the engines of an aircraft. Emissions from fuel production/refining or transport of fuels were not considered. Another issue compared was Local Area Pollution (LAP), which is a measure of the severity of emissions effect on the environment. This was examined because all emissions from HSR occur close to the surface of the earth, and hence effect the local environment, while only a portion of aircraft emissions do. This study was carried out using internationally recognized emission inventory methodologies. For the air travel emission estimate methodologies and data published by the Intergovernmental Panel on Climate Change (IPCC) and the International Civil Aviation Organization (ICAO) were used. The HSR energy use was estimated from energy use data from currently running HSR programs, in France, UK and Spain (Alvarez, 2007; Kemp, 2007). The emissions were then estimated using an adjusted tier 3 method. For aviation emissions a tier three method was also used. The findings of this research are mixed. HSR would emit 66% less GHG emissions using today's energy mixes for California and Nevada. Using California's 2020 target energy mix HSR would emit 80% less GHG emissions. However, using today's energy mix HSR would cause 33% more LAP than air travel. Using California's 2020 mix the HSR would cause 22% less LAP the air travel. However this 20% improvement would likely be eroded by aircraft emissions improvement between now and 2020. To conclude, this research found that HSR does offer significant GHG emission reductions, when compared to air travel between Los Angeles and Las Vegas. However is less clear regarding LAP, though HSR has the potential to create savings here in the future as well. For other corridors around the U.S.A., earmarked for HSR, similar studies should be carried out to examine the benefits of such mode transfer.

Mullins, Damien


New ultracool subdwarfs identified in large-scale surveys using Virtual Observatory tools. I. UKIDSS LAS DR5 vs. SDSS DR7  

NASA Astrophysics Data System (ADS)

Aims: The aim of the project is to improve our knowledge of the low-mass and low-metallicity population to investigate the influence of metallicity on the stellar (and substellar) mass function. Methods: We present the results of a photometric and proper motion search aimed at discovering ultracool subdwarfs in large-scale surveys. We employed and combined the Fifth Data Release (DR5) of the UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) and the Sloan Digital Sky Survey (SDSS) Data Release 7 complemented with ancillary data from the Two Micron All-Sky Survey (2MASS), the DEep Near-Infrared Survey (DENIS) and the SuperCOSMOS Sky Surveys (SSS). Results: The SDSS DR7 vs. UKIDSS LAS DR5 search returned a total of 32 ultracool subdwarf candidates, only two of which are recognised as a subdwarf in the literature. Twenty-seven candidates, including the two known ones, were followed-up spectroscopically in the optical between 600 and 1000 nm, thus covering strong spectral features indicative of low metallicity (e.g., CaH), 21 with the Very Large Telescope, one with the Nordic Optical Telescope, and five were extracted from the Sloan spectroscopic database to assess (or refute) their low-metal content. We confirm 20 candidates as subdwarfs, extreme subdwarfs, or ultra-subdwarfs with spectral types later than M5; this represents a success rate of ? 60%. Among those 20 new subdwarfs, we identify two early-L subdwarfs that are very likely located within 100 pc, which we propose as templates for future searches because they are the first examples of their subclass. Another seven sources are solar-metallicity M dwarfs with spectral types between M4 and M7 without H? emission, suggesting that they are old M dwarfs. The remaining five candidates do not have spectroscopic follow-up yet; only one remains as a bona-fide ultracool subdwarf after revision of their proper motions. We assigned spectral types based on the current classification schemes and, when possible, we measured their radial velocities. Using the limited number of subdwarfs with trigonometric parallaxes, we estimated distances ranging from ~95 to ~600 pc for the new subdwarfs. We provide mid-infrared photometry extracted from the WISE satellite databases for two subdwarfs and discuss their colours. Finally, we estimate a lower limit of the surface density of ultracool subdwarfs about 5000-5700 times lower than that of solar-metallicity late-M dwarfs. Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme ID 084.C-0928A.Based on observations made with the Nordic Optical Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofsica de Canarias.

Lodieu, N.; Espinoza Contreras, M.; Zapatero Osorio, M. R.; Solano, E.; Aberasturi, M.; Martn, E. L.



Infrared Camera Characterization of Bi-Propellant Reaction Control Engines during Auxiliary Propulsion Systems Tests at NASA's White Sands Test Facility in Las Cruces, New Mexico  

NASA Technical Reports Server (NTRS)

This paper describes the application of a FUR Systems A40M infrared (IR) digital camera for thermal monitoring of a Liquid Oxygen (LOX) and Ethanol bi-propellant Reaction Control Engine (RCE) during Auxiliary Propulsion System (APS) testing at the National Aeronautics & Space Administration's (NASA) White Sands Test Facility (WSTF) near Las Cruces, New Mexico. Typically, NASA has relied mostly on the use of ThermoCouples (TC) for this type of thermal monitoring due to the variability of constraints required to accurately map rapidly changing temperatures from ambient to glowing hot chamber material. Obtaining accurate real-time temperatures in the JR spectrum is made even more elusive by the changing emissivity of the chamber material as it begins to glow. The parameters evaluated prior to APS testing included: (1) remote operation of the A40M camera using fiber optic Firewire signal sender and receiver units; (2) operation of the camera inside a Pelco explosion proof enclosure with a germanium window; (3) remote analog signal display for real-time monitoring; (4) remote digital data acquisition of the A40M's sensor information using FUR's ThermaCAM Researcher Pro 2.8 software; and (5) overall reliability of the system. An initial characterization report was prepared after the A40M characterization tests at Marshall Space Flight Center (MSFC) to document controlled heat source comparisons to calibrated TCs. Summary IR digital data recorded from WSTF's APS testing is included within this document along with findings, lessons learned, and recommendations for further usage as a monitoring tool for the development of rocket engines.

Holleman, Elizabeth; Sharp, David; Sheller, Richard; Styron, Jason



The Ordovician Las Chacritas pluton (Sierra de Humaya, NW Argentina): origin and emplacement triggered by lateral shortening and magmatic stoping at mid-crustal level  

NASA Astrophysics Data System (ADS)

Field relationships and structural studies combined with in situ U-Th-Pb dating of monazite from Las Chacritas pluton (LCP), Sierra de Humaya, provide insight into the emplacement of peraluminous magmas triggered by lateral shortening of the host rock and magmatic stoping at a mid-crustal level of a retro-arc zone in a convergent orogen. Modal and chemical compositions indicate that the LCP is composed of two main igneous units of peraluminous granitoids. The predominant two-mica granitoids were generated by interaction of crustal rocks with mafic or mafic-derived magmas and/or crystal-rich magmas that entrained residual phases, whereas less abundant leucocratic granitoids may have been originated by partial melting of metasedimentary rocks. The calculated crystallization age of 474 4 Ma is consistent with Ordovician ages (477-470 Ma) of the high-grade metamorphic rocks, indicating concomitant magmatism and metamorphism during the Famatinian orogeny. The LCP was emplaced in the middle crust at a maximum depth of ~14.5 km, where attendant fracturing and ductile deformation were active. Field evidence shows strong temporal and spatial relationships between host rock ductile deformation and the emplacement of the pluton such as folding and strike deflection of the host rock layering and folded concordant leucocratic sheets with magmatic fabrics. This suggests that material transfer processes like lateral wall rock displacement (lateral shortening) was a viable mechanism for the emplacement of the LCP. However, cross-sectional restoration and field evidence such as wall rock xenoliths and intrusive truncations of the host rock foliation and fold traces suggest that magmatic stoping was a complementary mechanism to create the necessary space for the emplacement of the LCP. This work supports previous studies showing that participation of multiple material transfer processes are the rule rather than the exception in the emplacement of plutons.

Larrovere, Mariano A.; Alasino, Pablo H.; de los Hoyos, Camilo R.; Willner, Arne P.



Mechanized and natural soil-to-air transfer of trifluralin and prometryn from a cotton field in Las Cruces, New Mexico.  


Two pre-emergence herbicides (trifluralin and prometryn) were applied on a cotton field in Las Cruces, New Mexico, and their atmospheric particle and gas-phase concentrations were measured during mechanized soil preparation and natural wind erosion sampling events before and after herbicide application. Air sampling was conducted using samplers mounted at various heights from the ground and at various locations on the field. During mechanized soil management with a disk harrow, sampling occurred at two distances from the tractor ("near-source", 4 m downwind and "far-source", 20-100 m from the disking tractor). Natural background (no disking) sampling events occurred during daytime and at night. Both herbicides were quantifiable for all postapplication sampling events, including background sampling that occurred 8, 38, and 40 days after herbicide application. Average concentrations in both the gas and particle phases ranged from about 10 to 350 ng/m(3). Averaging by event type, mean total prometryn concentrations were 2 (night background) to 8 (near-source) times higher than the corresponding trifluralin concentrations. Prometryn/trifluralin ratios were higher in airborne samples than in soil, indicative of trifluralin losses during daytime sampling, possibly via atmospheric reactions. Prometryn particle phase mass fractions were generally higher than those for trifluralin for all sampling events, consistent with Kair/soil-oc partition coefficients, and particle-phase mass fractions were higher for near-source disking and daytime background sampling compared to far-source and nighttime. Daytime natural background prometryn concentrations could be as high as those measured during disking, and background samples showed significant relationships to meteorological parameters (air temperature, relative humidity, and dewpoint). Mechanical disturbance by tilling operations reduced the ability to predict airborne herbicide concentrations on the basis of meteorological conditions. Prometryn concentrations were higher for larger particle sizes (Dp > 1.8 ?m), while no clear patterns with particle size were observed for trifluralin. Trifluralin concentrations in the smallest size bin (PM0.18) were 2-50 times higher than prometryn for the three disking events where an impactor was used, indicating the importance of measuring size-resolved herbicide distributions in future studies. PMID:24040758

Holmn, Britt A; Kasumba, John; Hiscox, April; Wang, Junming; Miller, David



The Las Campanas Observatory/Gemini-South campaign for Deep Impact target comet 9P/Tempel 1: Overview and Highlights  

NASA Astrophysics Data System (ADS)

We present initial results of a combined LCO/Gemini observational programme to characterize the Deep Impact target 9P/Tempel 1 before, during and after the expected excavation of a new impact crater on 04 July 2005. Our programme combines a suite of optical, near-IR and thermal-IR instruments at the Las Campanas Observatory and Gemini South in Chile to establish a baseline and then observe the consequences when the Deep Impact Mission fires a 370kg copper projectile to penetrate the mantle of comet 9P/Tempel 1. Observations are scheduled between 20 June and 20 July, 2005. We are employing T-ReCS on Gemini South to obtain thermal infrared imaging and spectroscopy of the comet simultaneously with narrowband optical continuum and near infrared imaging from the two Magellan 6.5 meter telescopes using MagIC and PANIC. Taken together these high spatial resolution data will allow us to model the physical and chemical characteristics of the subsurface material freshly excavated by the Deep Impact projectile. We will determine or constrain the composition, albedo, size distribution, and production rate, for the dust and water ice particles in the coma prior to the mission impact (8 cometary rotations pre-impact) and then compare these same properties at three epochs following the excavation of the impact crater (immediately following the impact within the first cometary rotation, after another 4 cometary rotations and again 8 rotations after impact). To compliment the T-ReCS spectroscopy obtained within the first cometary rotation following impact, we will also have simultaneous 5-30 micron spectra obtained with the IRS instrument on the Spitzer spacecraft at UT 01:54 and 23:13 on 05 July. In addition to these simultaneous Magellan/Gemini observations, wide-field narrowband imaging will be carried out at the duPont 2.5m telescope at LCO between 27 June and 09 July, 2005. Together, these investigations will provide a detailed characterization of pristine cometary material dating back to the origins of our solar system.

Osip, D. J.; De Buizer, J.; Thomas-Osip, J. E.; Lederer, S. M.; Lisse, C.



Remote sensing of PM, NO, CO and HC emission factors for on-road gasoline and diesel engine vehicles in Las Vegas, NV.  


A novel light detection and ranging-based remote sensing system was assembled and used to measure mass particulate matter (PM) emissions per unit of fuel burned from in-use on-road vehicles. A commercially available remote sensing system was concurrently used to measure emissions of carbon monoxide (CO), nitrogen oxide (NO) and hydrocarbons (HC). The two systems were used to measure 61,207 gasoline and 1180 diesel powered vehicle emissions in Las Vegas, NV from 4/4/2000 to 5/16/2002. Emission factors were related to vehicle age, weight class and fuel type by matching license IDs to the state registration data. Measurements of vehicle speed and acceleration permitted the analysis of emission factors by vehicle specific power (VSP). Average emission factors were calculated for light-duty (<3863 kg [8500 lbs]) gasoline vehicles (LDGV), light-duty diesel vehicles (LDDV), heavy-duty (>3863 kg [8500 lbs]) gasoline vehicles (HDGV) and heavy-duty diesel vehicles (HDDV). LDDV and HDDV emitted approximately 25 times more PM per mass of fuel than LDGV and HDGV. Sufficient numbers of LDGV were measured to relate VSP with CO, HC and NO emissions. No relationship was observed between PM emissions and VSP. PM emission factors from LDGV increased with vehicle age. Fuel-based emission factors measured by remote sensing were compared with MOBILE6 and PART5 emissions model factors. Good agreement was observed for HC emission factors for vehicles less than 20 years old. MOBILE6 CO emission factors were approximately 2 times greater than measured CO emission factors for vehicles less than 13 years old. Measured NO emission factors were approximately 50% greater than MOBILE6 factors for vehicles 7-15 years old but in good agreement for vehicles less than 7 years old. Measured PM emission factors showed a clear increase with vehicle age, however, PART5 uses only a single PM emission factor for LDGV less than 18 years old. The PM emission factors for the fleet of LDGV, HDGV, LDDV and HDDV were 0.06, 0.05, 1.6 and 1.5 g/kg, respectively. PMID:15081743

Kuhns, Hampden D; Mazzoleni, Claudio; Moosmller, Hans; Nikolic, Djordje; Keislar, Robert E; Barber, Peter W; Li, Zheng; Etyemezian, Vicken; Watson, John G



Measurement of Black Carbon Particles and their Mixing State in Wildfire Plumes from New Mexico: Aged Whitewater Baldy Complex in 2012 and Fresh Las Conchas in 2011  

NASA Astrophysics Data System (ADS)

Approximately 50% of black carbon (BC) aerosols come from wildfires and are estimated to contribute up to ~0.6 W/m2 warming of the atmosphere globally. Organic carbon (OC) from fires condenses and/or mixes with BC resulting in an overall lower forcing of 0.03 0.12 Wm-2 from biomass burning. However, this reduction depends strongly on the composition of the carbonaceous aerosols and on the mixing state of OC and BC. Detailed model treatments and laboratory measurements indicate that a BC core coated with a non-absorbing OC layer enhances absorption with a positive climate forcing. However, the real-time identification of the coating on this internally mixed BC in the field has only recently become detectable with the analysis of lag times between the scattering and incandescence signals in measurements from the single particle soot photometer (SP2). While fully coated BC has a positive lag time (cBC) in the SP2 data, BC that is located near the surface (nsBC) is associated with a negative lag time (Sedlacek et al. 2012). We investigate BC mixing states in concentrated wildfire plumes from the two largest wildfires in New Mexico's history with different ages. Plumes from the Las Conchas (LC) Fire, a wildfire that occurred in July-August of 2011 and burned ~157K acres, were sampled in the near-field after only a few hours of aging. Older plumes from the Whitewater Baldy (WB) Fire (May-June, 2012) that burned ~300K acres were sampled from further afield with an aging period of 7-9 hours. We find up to 23% of the internally mixed BC to be nsBC in the older WB plume. The nsBC fraction is smaller for the relatively fresh LC plume. Figure 1 shows %nsBC versus plume age as a conceptual framework of increasing %nsBC with age for the wildfire data shown here. SP2 results are corroborated by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) of single particles collected on nuclepore membranes that clearly show the shifts in morphology. Furthermore, we performed thermal denuding (TD) studies that provide additional information on the nature of the OC and the BC coatings. When the TD was operated at 200C ~50% of the nsBC was removed. For the plumes sampled we show that the majority of the BC exhibits a core-shell coating structure for the range of aging times and conditions sampled here. Figure 1. Percent nsBC plotted versus atmospheric age (HYSPLIT back trajectory analysis) for internally mixed BC in wildfire plumes. (nsBC defined as BC with < 0 usec lag times except for the data approximated from Sedlacek et al.(2012) that uses < -1.25 usec.)

Aiken, A. C.; Dubey, M. K.; Gorkowski, K.; Mazzoleni, C.; China, S.



NURE aerial gamma-ray and magnetic reconnaissance survey of portions of New Mexico, Arizona and Texas. Volume II. New Mexico-Las Cruces NI 13-10 Quadrangle. Final report  

SciTech Connect

The results of a high-sensitivity, aerial gamma-ray spectrometer and magnetometer survey of the Las Cruces two degree quadrangle, New Mexico, are presented. Instrumentation and methods are described in Volume 1 of this final report. The work was done by Carson Helicopters, Inc., and International Exploration, Inc. The work was performed for the US Department of Energy - National Uranium Resource Evaluation (NURE) program. Analysis of this radiometric data yielded 192 statistically significant eU anomalies. Of this number, thirty-nine were considered to be of sufficient strength to warrant further investigation.

Not Available



Pronounced site preference and mixed dinuclear dichalcogenide anions (SSe)2- in ternary lanthanum sulfide selenides - The solid solution LaS1.9-LaSe1.9  

NASA Astrophysics Data System (ADS)

Ternary lanthanum sulfide selenides LaS1.9-xSex (0 < x < 1.9) were obtained by reaction of the elements in a potassium bromide flux. The ternary compounds adopt the CeSe1.9 structure type (tetragonal, space group P42/n, No. 86) and form a complete solid solution series without indications of ordered superstructures. The lattice parameters of the samples follow Vegard's rule and are found in the range of 915 ? a ? 943 pm and 1644 ? c ? 1703 pm. A pronounced ordering of the distribution of chalcogen atoms is observed which can be attributed to charge density and size effects. The existence of three different types of dichalcogenide anions, namely S22-, Se22- and mixed (SSe)2-, is evidenced by Raman spectroscopy.

Bartsch, Christian; Doert, Thomas



March 3 6 Las Vegas, Nevada  

E-print Network

Insights ­ Identity & Access Management ­ Understanding & Addressing Emerging Threats ­ Data Security: Kris Lovejoy General Manager, IBM Security Services, Global Technology Services Sandy Bird Chief Technology Officer, IBM Security Systems Brendan Hannigan General Manager, IBM Security Systems Peyton


Matthew Buoni 2125 Las Varas Canyon Road  

E-print Network

to solve Mathematical modeling and computer simulation of physical and engineering systems Monte-Carlo/or moving boundaries Signal processing and data mining #12;Research Experience (selected) Design Monte-Carlo methods for studying rarified flow in non-equilibrium plasmas, Ohio State U., Mechanical

Bigelow, Stephen


Amir K. Nicknam, MD Las Vegas, Nevada  

E-print Network

. Rosenberg, MD Buffalo, New York Michael J. Schmalz Franklin, Wisconsin Graciela B. Villadoniga, MD College: Villadoniga, Gathirimu, Cabacungan, Rosenberg, Laurino, Schmalz, Khan, Frye, Kailath, Brown Dr. Frye and Casey


Indicadores de alerta de las crisis bancarias  

Microsoft Academic Search

En los ltimos 20 aos se han visto perturbaciones considerables en el sector financiero de muchos pases. Los episodios ms graves han sido tal vez los observados en algunos mercados emergentes. Los problemas del sistema bancario que comenzaron a mediados de los aos noventa en algunos pases asiticos (entre ellos Corea, Indonesia y Tailandia) tambin han puesto en evidencia el

Brenda Gonzlez-Hermosillo




Microsoft Academic Search

We did a prospecth'e study about the anesthetic management of patients given general anesthesia for acute ocular trauma during a three months period at Dr. Luis E. Aybar Hospital, with the purpose of evaluating the quality of the anesthesia, mainly by the way the patients regained conscience. Due to the their condition of emergency, the patients were not premedicated. They

Elba Sanchez Baret; Granados Alonso; Carmen Joselyn Nova; Dimas Jimenez



E-print Network

time an employer's work force will reflect the gender and ethnic / racial minorities profile of women and ethnic and racial minorities among its employees in relation to the availability of women and ethnic and racial minorities in the labor market as part of its broader EEO/AA Program. General Purpose

Hemmers, Oliver



E-print Network

discrimination, over time an employer's work force will reflect the gender and ethnic / racial minorities profile and Premise [41 CFR §60-2.10] 2 Organizational Profile [41 CFR §60-2.11] 3 Job Group Definition [41 CFR §60 of the representation of women and ethnic and racial minorities among its employees in relation to the availability

Hemmers, Oliver



E-print Network

time an employer's work force will reflect the gender and ethnic / racial minorities profile/AA PROGRAM TABLE OF CONTENT General Purpose and Premise [41 CFR §60-2.10] 2 Organizational Profile [41 CFR of women and ethnic and racial minorities among its employees in relation to the availability of women

Hemmers, Oliver


A Satellite View of Las Vegas  

NSDL National Science Digital Library

This problem set is about scale. Using a ruler, learners will measure the distance between two points on a satellite image and determine the scale of the image and other information to answer a series of questions. Answer key is provided. This is part of Earth Math: A Brief Mathematical Guide to Earth Science and Climate Change.



Mjese las manos con agua tibia co-  

E-print Network

después de preparar alimentos Después de usar el baño o ayudar a un niño a usar el baño Después de manejar cada alimento y al cambiar de alimentos crudos a cocidos. Después de lavar, desinfecte los fre



E-print Network

falta de agua obliga a registrar los per´iodos de lluvias o inundaciones (almanaques, calendario (!), entre Sumer (Irak) y Elam (Iran), por agua Primeros imperios Primeras civilizaciones 3500 a.C.: Sumerios

Pinasco, Juan Pablo



E-print Network

conocimientos Aparece el lenguaje escrito 1 #12;2 JUAN PABLO PINASCO La falta de agua obliga a registrar los per´iodos de lluvias o inundaciones (almanaques, calendario) Primeras obras de ingenier´ia: diques y canales anexiones Clases sociales Primera guerra: en Basora (!), entre Sumer (Irak) y Elam (Iran), por agua Primeros

Pinasco, Juan Pablo


Brazil = Brasil. America = Las Americas [Series].  

ERIC Educational Resources Information Center

Written for teachers to use with migrant children in elementary grades, this bilingual English/Spanish social studies resource booklet provides an encyclopedia-style overview of Brazil's history, geography, economy, and culture. Topics include Brazil's form of government; geographic regions; holidays; climate; people; music; carnaval celebration;

Toro, Leonor; And Others


LAS Language Arts Supplement, Spanish. Revised Edition.  

ERIC Educational Resources Information Center

Like its English counterpart, this is a collection of over 100 games and activities whose intent is to increase oral proficiency without requiring reading skills. The collection grew out of the desire to provide remedies for specific linguistic weaknesses in Spanish as identified by the Language Assessment Scales. Because tongue twisters, riddles,

DeAvila, Edward A.; Duncan, Sharon E.


Fluorescence spectra and elastic scattering characteristics of atmospheric aerosol in Las Cruces, New Mexico, USA: Variability of concentrations and possible constituents and sources of particles in various spectral clusters  

NASA Astrophysics Data System (ADS)

The UV-excited laser-induced-fluorescence (UV-LIF) spectra of single atmospheric particles and the three-band integrating-nephelometer elastic scattering of atmospheric aerosol were measured during four approximately 24-h periods on May 2007 in Las Cruces, New Mexico, USA. Aerosol scattering measurements in the nephelometer red channel (50-nm band centered at 700-nm) ranged from around 3-10 times the molecular (Rayleigh) scattering background. On average 22.8% of particles with size greater than about 1 ?m diameter have fluorescence above a preset fluorescence threshold. A hierarchical cluster analysis indicates that most of the single-particle UV-LIF spectra fall into about 10 categories (spectral clusters) as found previously at other geographic sites (Pinnick et al., 2004; Pan et al., 2007). The clusters include spectra characteristic of various humic/fulvic acids, humic-like-substances (HULIS), chemically aged terpenes, fungal spores, polycyclic aromatic hydrocarbons, bacteria, cellulose/pollens, and mixtures of various organic carbon compounds. By far the most populated cluster category is similar to those of chemically aged terpenes/humic-materials; on average this population comprises about 62% of fluorescent particles. Clusters with spectra similar to that of some HULIS aerosol contain on average 10.0% of particles; those characteristic of some fungal spores (or perhaps mixtures of aromatic organic compounds) 8.4% of particles; bacteria-like spectra 1.6% of particles; and cellulose/pollen-like spectra 0.8% of particles. Measurements of fluorescent particles over relatively short (24 min) periods reveal that the concentrations of particles in the most populated clusters are highly correlated, suggesting that the particles populating them derive from the same region; these particles might be composed of crustal material coated with secondary organic carbon. On the other hand, concentrations of particles having cellulose-like spectra are generally uncorrelated with those in any other cluster. No clear distinction in fluorescent aerosol characteristics can be seen for different air mass trajectories arriving at the sampling site, suggesting that fluorescent aerosol particles are primarily of local origin. Integrations of the single-particle UV-LIF spectra over approximate 24 h time intervals reveal two broad peaks around 350 nm and 450 nm (for 263 nm excitation); the 450 nm peak is somewhat similar to that measured previously for water soluble organic carbon derived from aerosol collections. The 350 nm peak apparently has not been seen before in measurements of aerosol collections and may derive from non-soluble primary biological aerosol particles such as fungal spores. Further measurements are needed to investigate in more detail the generality of these results.

Pinnick, R. G.; Fernandez, E.; Rosen, J. M.; Hill, S. C.; Wang, Y.; Pan, Y. L.



A preliminary evaluation of vertical separation between production intervals of coalbed-methane wells and water-supply wells in the Raton basin, Huerfano and Las Animas Counties, Colorado, 1999-2004  

USGS Publications Warehouse

The Raton Basin in southern Colorado and northern New Mexico is undergoing increased development of its coalbed-methane resources. Annual production of methane from coalbeds in the Raton Basin in Huerfano and Las Animas Counties, Colorado, increased from about 28,000,000 thousand cubic feet from 478 wells to about 80,000,000 thousand cubic feet from 1,543 wells, during 1999-2004. Annual ground-water withdrawals for coalbed-methane production increased from about 1.45 billion gallons from 480 wells to about 3.64 billion gallons from 1,568 wells, during 1999-2004. Where the coalbeds are deeply buried near the center of the Raton Basin, water pressure may be reduced as much as 250 to 300 pounds per square inch to produce the methane from the coalbeds, which is equivalent to a 577- to 692-foot lowering of water level. In 2001, the U.S. Geological Survey, in cooperation with the Colorado Water Conservation Board, began an evaluation of the potential effects of coalbed- methane production on the availability and sustainability of ground-water resources. In 2003, there were an estimated 1,370 water-supply wells in the Raton Basin in Colorado, and about 90 percent of these water-supply wells were less than 450 feet deep. The tops of the production (perforated) interval of 90 percent of the coalbed-methane wells in the Raton Basin (for which data were available) are deeper than about 675 feet. The potential for interference of coalbed-methane wells with nearby water-supply wells likely is limited because in most areas their respective production intervals are separated by more than a hundred to a few thousand feet of rock. The estimated vertical separation between production intervals of coalbed-methane and water-supply wells is less than 100 feet in an area about 1 to 6 miles west and southwest of Trinidad Lake and a few other isolated areas. It is assumed that in areas with less than 100 feet of vertical separation, production by coalbed-methane wells has a greater potential for interfering with nearby water-supply wells. More detailed geologic and hydrologic information is needed in these areas to quantify the potential effects of coalbed-methane production on water levels and the availability and sustainability of ground-water resources.

Watts, Kenneth R.



Creatures in Hemingway's Short Stories: Les Hommages to Human Grief  

Microsoft Academic Search

The Complete Short Stories of Ernest Hemingway, the Finca Viga Edition published by Charles Scribner's Sons in 1987, contains in its whole bulk of seventy stories the eight items in whose titles Hemingway had the same number of creatures included: ? \\



S. B. HEDGESAND O. H. GARRIDOS. B. HEDGESAND O. H. GARRIDO Two new species of Sphaerodactylusfromeastern  

E-print Network

Examined Sphaerodactylusoliveri.-Cuba: Sancti Spiritus Prov., Trinidad,LomadelNiarin(MCZ19568);7mi.WTrin- idad (USNM 140430-39);FincaMorales,8 mi. NW Trinidad(AMNH78350);10mi.WTrinidad(138018- 20);Cienfuegos., Trinidad,LomadelNiarin(MCZ19568);7mi.WTrin- idad (USNM 140430-39);FincaMorales,8 mi. NW Trinidad(AMNH78350

Hedges, Blair


University Libraries University of Nevada, Las Vegas University of Nevada, Las Vegas  

E-print Network

contains a great deal of information. The Center pulls cogent data in selected categories to construct in it Occasional Paper Series, Darryl Smith's "Souls/Soles of Signs: Tell Totems and the Sphinx Wager." The paper develops a philosophy of play through an analysis of the foot wager of the Sphinx. Applying a construction

Hemmers, Oliver



E-print Network

resultado la condensación del vapor de agua, formando nubes y lluvia. #12;Qué es un huracán?Qué es un desarrolla sobre aguas relativamente cálidas de los océanos tropicales o sub-tropicales y que presenta convección fuerte y organizada con lluvias intensas y vientos de superficie con un patrón ciclónico bien

Grutter, Michel


Inmunoterapias para las adicciones a las drogas Immunotherapies for Drug Addictions  

Microsoft Academic Search

Immunotherapies in the form of vaccines (active immunization) or monoclonal antibodies (passive immunization) appear safe and a promising treatment approaches for some substance-related disorders. The mechanism of action of the antibody therapy is by preventing the rapid entry of drugs of abuse into the central nervous system. In theory, immunotherapies could have several clinical applications. Monoclonal antibodies may be useful

Ivn D. Montoya


Fueron las Bacterias las Primeras Formas de Vida en la Tierra?  

NSDL National Science Digital Library

Human cells can reveal evolutionary history because they contain molecular fossils; exhibit mechanisms that were in development when life began; and indicate that ancient organisms may be more complex than first thought.

Daniel Jeffares (University of Copenhagen, Denmark;); Anthony Poole (Stockholm University, Sweden;)




Microsoft Academic Search

The aim of this research was to discriminate groups of students who had the same knowledge of English by using the Pathfinder procedure (Schvaneveldt 1990; Schvaneveldt, Durso, Goldsmith, Breen, Cooke, Tucker and De Maio 1985). To get this purpose four different measures were obtained: proximity, similarity, distance and also a lexical test. This test was exhaustively assessed to shed light

Snchez Manzano


Problemas ambientales, agricultura y globalizacin en Amrica Latina  

Microsoft Academic Search

La globalizacin y la progresiva liberalizacin de los mercados agropecuarios mundiales representarn un importante estmulo para que los pases latinoamericanos intenten aumentar la productividad y la competitividad internacional de sus producciones agrcolas y ganaderas, en consonancia con un modelo de crecimiento econmico basado en la bsqueda de beneficios a corto plazo. Esto conducir sin duda alguna a la profundizacin de

Jos Antonio Segrelles Serrano



University of Nevada Las Vegas LED Display Engineering  

SciTech Connect

The primary objective of this part of the project is to develop and implement a method that compensates for the inefficiency of the green LED. The proposed engineering solution which will be the backbone of this project will be to use RGBW combination in every pixel to save energy. Two different RGBW geometrical pixel configurations will be implemented and compared against traditional LED configurations. These configurations will be analyzed for energy efficiency while keeping the quality of the display the same. Cost of the addition of white LEDs to displays along with energy cost savings will be presented and analyzed.




Las Tierras de Nuevo Mexico. [The Lands of New Mexico.  

ERIC Educational Resources Information Center

New Mexico was inhabited thousands of years ago. Each group of settlers saw the land in distinct ways. For some, its beauty consisted of its quality, the abundance of water, and the hope of a good harvest. For others, its beautiful sites were of more importance. Thus, each group established its own manner of living on the land and of using it.

Swadesh, Frances Leon; And Others


[Parenting Information: Drugs. Informacion Para los Padres: Sobre las Drojas.  

ERIC Educational Resources Information Center

These two booklets provide basic information about drugs and drug abuse and are part of a series of 22 booklets, designed specifically to help parents understand their children and help them to learn. "Let's Talk about Drug Abuse," (booklet #18), reviews foreign substances or drugs young people are often exposed to (i.e., tobacco, alcohol,

Moreno, Steve


University of Nevada, Las Vegas Academic and Administrative Faculty  

E-print Network

is not addressed in this handbook, you may search the UNLV website for it by typing your inquiry into the "search seats about 200. Financial Aid: Priority Filing Dates: · Free Application for Federal Student Aid (FAFSA

Hemmers, Oliver



E-print Network

of Newton's laws of motion applied to sport/exercise evaluation. F. Develop the ability to construct a model. Newton's laws b. Friction c. Impulse-Momentum d. Conservation of Momentum e. Collisions 5. Explaining the Causes of Motion without Newton a. Work, Energy, Power b. Work-Energy relationship 6. Torques and Moments

Ahmad, Sajjad



E-print Network

. Develop the knowledge to explain and apply the linear and angular forms of Newton's laws of motion. F) a. Force: gravity and friction b. Newton's laws of motion c. Types of forces: (external and internal. Center of mass d. Newton's laws of motion: angular analogues e. Moment of in

Ahmad, Sajjad


Las polticas de gasto en educacin y enseanza universitaria  

Microsoft Academic Search

Aproximacin a los principales indicadores de poltica educativa en el anlisis comparado. Tambin se estudia la evolucin del gasto pblico en educacin y en enseanza universitaria, analizando los distintos tipos de actuaciones que integran esta poltica y los agentes responsables de realizarla.

Carmen Prez Esparrels; Alfonso Utrilla de la Hoz



John A. Mercer, Ph. D. University of Nevada, Las Vegas  

E-print Network Education Ph.D. University of Oregon, Eugene, OR 1999 Biomechanics.A. (2008). Biomechanics of human locomotion in water: An electromyography analysis. Exercise and Sport.A. (2008). Impact attenuation and variability during running in females: A lifespan investigation. Journal

Ahmad, Sajjad


Las personas con diabetes deben lograr un balance entre los  

E-print Network

en un lado del plato y los alimentos bajos en carbohidratos al otro lado. Karen Halderson, MPH, RD bajos en carbohidratos, manteniendo cada uno en su propio lado del plato o de la mesa. Comer vegetales en diferentes lados de su plato y ver si su plato está "balanceado". Sin embargo, muchas veces


La Chispa De Las Honduranos: Imperialism and Human Experience  

ERIC Educational Resources Information Center

This article explores a student's expectations and the lived realities of a two-week service learning trip to Honduras. Originally, her expectations were critical and cynical. But through a series of journal entries she made during the program, she shows how her expectations were transformed by the actual experience and how she achieved her own

Thornton, Rebecca Mercado




Microsoft Academic Search

This study analyzes rain distribution in Central America, considered as a geo- graphic area. Geography, as spatial science, allows for the climatologic analysis of the isthmus at three different scales. The zone scale allows visualizing the influence of the northern winds, the behavior of the inter-tropical convergence area and the oceanic influence over the continent. The regional scale focuses on

Gilbert Vargas Ulate




Microsoft Academic Search

This paper is a report on the role that tourism should have in the recovery of historical cities. It will deal more precisely with those cities which suffered a severe process of indus- trial development with important inflections. We will start by analyzing a number of considerations on what we will refer to as second nature, that is, the widest

Jos Luis Andrs Sarasa



Tratamiento del paludismo peditrico: Papel de las intervenciones nutricionales  

Microsoft Academic Search

ResumenEl paludismo es una causa primordial de morbilidad y mortalidad en nios, particularmente en frica subsahariana. Aunque se ha logrado un progreso considerable en el tratamiento del paludismo peditrico con el tratamiento de combinacin basado en la artemisinina, siguen existiendo numerosos obstculos que se oponen a la puesta en prctica efectiva de estas nuevas opciones teraputicas sumamente eficaces. Anlogamente, si

Akoto Kwame Osei; Davidson H. Hamer



Modos de afrontamientos que utilizan las Asistentes Sociales de las Municipalidades y Consultorios de atencin primaria en Salud de las comunas de las Condes y de Santiago que estn proclives o que presentan el Sndrome de  

Microsoft Academic Search

Social Workers are dialy under strong emotional pressure in assisting people with socioeconomic problems, family and sociowork disfuntions. The objetive of this paper is to determine the coping strategies related to those professional people who are in risk or who has developed burnout. The universe under inspection corresponded to the total amount of social workers (76) who worked in the

Javier Barra Muoz


Encuestas movilidad espacial Bogot METAL 2009. Metodologa de las encuestas  

Microsoft Academic Search

En el marco del programa METAL Metrpolis de Amrica Latina en la globalizacin: reconfiguraciones territoriales, movilidad espacial, accin pblica que se desarrolla desde finales de 2007 con el apoyo financiero de la Agencia francesa de investigacin (ANR) y de la Agencia francesa interinstitucional de investigacin para el desarrollo (AIRD), hemos diseado y aplicado un sistema de encuestas en Bogot, Santiago

Franoise Dureau; Harold Crdoba; Carmen Elisa Flrez; Thierry Lulle



Ambivalencia e incertidumbre en las relaciones entre ciencia y sociedad  

Microsoft Academic Search

Ambivalence and uncertainty in the relationships between science and society The science-society relationship has gone by several circumstances along the history. At the present, their relationship is marked by the ambivalence and the uncertainty that it generates diverse upsets into and among both spheres. The advance of the techno-sci- entific sphere and the difference and the threat perception that society

J. Rubn Blanco; Juan Manuel Iranzo Amatrian



Como Promover el Exito de las Ninas y las Minorias en las Ciencias y en las Matematicas. Para Padres/sobre Padres (How To Promote the Science and Mathematics Achievement of Females and Minorities. For Parents/about Parents).  

ERIC Educational Resources Information Center

Some minority and female students traditionally have not been given the help they need to enroll and succeed in mathematics and science classes. Now, however, various approaches are available to give these students the extra attention they need. Parents can help children develop an interest in science and mathematics by: (1) identifying role

Schwartz, Wendy


Las Campanas Spectral Classification of ASASSN-15aj  

NASA Astrophysics Data System (ADS)

We report a high resolution optical spectrum (range 320-1000 nm) of ASASSN-15aj (ATel #6886) obtained on UT January 12.17 with the Magellan Inamori Kyocera Echelle (MIKE) at the 6.5 m Magellan II (Clay) telescope.

Simon, J.; Morrell, N.; Phillips, M. M.



Observando Las Fases Y Caractersticas De La Luna  

NSDL National Science Digital Library

Learners will first observe a first quarter Moon and as a group, predict which phase the Moon will be in during the next observation. They then continue to chart the progress of the lunar cycle of phases throughout the following weeks to better understand the sequence. This is Actividad 1.2 as part of El Universo a Sus Pies, a Spanish-language curriculum, available for purchase.



Control del dolor: Apoyo para las personas con cncer

Libro sobre el control del dolor en pacientes con cncer. Cubre los mtodos y medicinas, as como los efectos fsicos y emocionales del dolor. Es una adaptacin cultural para el pblico de habla hispana del libro en ingls Pain Control.



Microsoft Academic Search

Drugs of abuse cause addiction, characterized by compulsive and out of control drug use. Several neurochemical and molecular changes take place in the brain during the first phase of drug use which leads to dependence and addiction. Every drug of abuse acts through similar neurophysiological mechanisms, mostly based on the abnormal activation of the mesolimbic dopamine system. Although the addicted

Eduardo Ruiz Durantez



Derechos humanos, una oportunidad para las polticas pblicas en salud  

Microsoft Academic Search

Human rights outlined a better scenario for public policies in health. For it requires intersectoral and interdisciplinary approach. This article emphasizes the perspective of public health policies based on human rights, clarifies the relationship of public policies with the exercise of human rights, beyond the right to health. It recognizes the need to implement genuinely democratic and participatory mechanisms.It considers

lvaro Franco-Giraldo; Carlos lvarez-Dardet



Esteban M Lucero 505 Sweet Ave. Las Cruces NM 88001  

E-print Network

and Science Museum · March 2012 Volunteer judge Southwestern New Mexico Regional Science and Engineering EDUCATION New Mexico State University 2008-Present Bachelor of Science, Biology, expected May 2014 Principle Investigator: Dr. Tim Wright Project Title: The influence of social environment on FoxP2

Wright, Timothy F.


Cmo hacer las gestiones con su plan de salud

Hay formas de saber si su plan de salud cubre los costos de atencin mdica de rutina durante un estudio clnico. Esta informacin puede servirle para saber con quin comunicarse para solicitar ayuda, preguntas que puede hacer y la informacin que debe recoger y guardar si decide participar en un estudio clnico.


Otra vez el Festival de las Amricas en Montreal  

E-print Network

introduccin de una nueva teatralidad en nuestro continente. Durante dcadas el teatro latinoamericano estuvo permeado y sujeto al discurso poltico, esto es, el teatro como medio para hacer poltica, lo cual condujo, a nuestro ver, a una especie de... bancarrota teatral doble: por una parte, el teatro no reflexion sobre s mismo, sobre su oficio, sobre su especificidad misma como espectculo y como trabajo sobre el actor y sobre el espacio escnico: nuestras sociedades han cambiado, su discurso...

de Toro, Fernando




Microsoft Academic Search

The present article emphasizes aspects from two important theoretical orientations Relevance Theory and Argumentation Theory - which are performed in the field of Pragmatics, to treatment of the discourse markers of Spanish language. Such theories not only give the first foundations in which are based the development of any study related to discourse markers as well as offer some relevant

Antonio Messias; Nogueira da Silva


Las Bacterias: M¡s que Pat³genos  

NSDL National Science Digital Library

The issue-focused, peer-reviewed article reveals that there are more bacteria on Earth than there are humans. Bacteria: inhabit every environment on the planet, playing a key ecological role, can be good for our health -- for example, by helping us digest food, and can cause disease even though the human body is not the natural host for many bacteria.

Trudy Wassenaar (consultant;)



University of nevada, Las vegas  

E-print Network

interdisciplinary minor in solar and renewable energies has awarded 15 scholarships this fall and soon expects with the Clark County School District in a 21st Century Teacher Preparation Schools program where mentor teachers the lives of 24,000 disadvantaged middle and high school students, helping them to stay in school and move

Cho, Hokwon



E-print Network

Registration Information ­ American Indian Chamber of Commerce ­ NSHE (Nevada System of Higher Education) Home Page ­ Clark County School District Home

Cho, Hokwon



E-print Network

, Ph.D. Effects Of War And Terrorism Lcsw (Ca.), Lmsw-Acp (Tx) On Individuals and Communities Office that such overwhelmingly and horrifying experiences as war and terrorism have on the individual and their social of terrorism in the framework of terror perpetrated on aggregates groups, rather than on one individual

Ahmad, Sajjad


Beneficios de la accin cooperativa en las unidades de informacin  

NASA Astrophysics Data System (ADS)

Due to the economic difficulties of the research and academic institutions, their libraries were unabled to satisfy their users. The journals collections were not updated and, consequently, the libraries became obsolete and mostly unusable. The following will focus on the benefits of the cooperative work to circunvent the problem. Full version is accesible at

Boeris, C. E.; Nievas, E. F.


Las Patentes del ADN Crean Monopolios en los Organismos Vivos  

NSDL National Science Digital Library

The issue-focused position statement from the Council for Responsible Genetics reflects on how patenting of life forms should be considered unethical because: it fosters biopiracy of indigenous resources, turns life forms into commodities to be used for profit, hinders the free-flow of scientific research, and destroys economic sustainability of developing nations.

Council for Responsible Genetics (Council for Responsible Genetics;)



University of Nevada (UNLV): Las Vegas, Nevada (Data)  

DOE Data Explorer

A partnership with the University of Nevada and U.S. Department of Energy's National Renewable Energy Laboratory (NREL) to collect solar data to support future solar power generation in the United States. The measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location. The solar measurement instrumentation is also accompanied by meteorological monitoring equipment to provide scientists with a complete picture of the solar power possibilities.

Stoffel, T.; Andreas, A.


Nevada Power: Clark Station; Las Vegas, Nevada (Data)  

DOE Data Explorer

A partnership with the University of Nevada and U.S. Department of Energy's National Renewable Energy Laboratory (NREL) to collect solar data to support future solar power generation in the United States. The measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location. The solar measurement instrumentation is also accompanied by meteorological monitoring equipment to provide scientists with a complete picture of the solar power possibilities.

Stoffel, T.; Andreas, A.


The Strip: Las Vegas and the Symbolic Destruction of Spectacle  

E-print Network

was the commercial advertising space par excellence, infeatured in the precious advertising space of the 2005 Superadvertising, the interiors defined by individual companies, ended up paying for the editorial, the communal spaces.

Al, Stefan Johannes




E-print Network

Pain Predictors of effective self-management in chronic low back pain Hundreds of millions of adults in the United States report having chronic pain, and many identify lower back pain as the primary complaint-management in individuals with chronic low back pain. Findings provide essential information to healthcare providers

Hemmers, Oliver


Acoustic engineering at Universidad de las Americas, Ecuador  

NASA Astrophysics Data System (ADS)

Acoustics, like science, an instrument to develop new technologies, comfortable atmospheres, and pleasant sounds, has not had a sufficient push in Ecuador. The shortage of professionals in the area, and the social ignorance of the advances and benefits of acoustics have been part of the problem. The University of the Americas has taken the initiative to develop an undergraduate program-only in the country-of sound and acoustics engineering, to contribute to the formation of professional futures that fortify the recent labor market in the areas of audio, professional, and acoustic engineering. This work presents/displays the results of the studies made for the creation of the race, the curricular mesh, and its projections.

Bravo, Luis A.; Naranjo, Jaime O.; Tassara, Alberto



El Centro para la Salud Mundial del NCI anuncia las primeras becas de investigacin para apoyar las tecnologas porttiles

El Centro para la Salud Mundial del NCI (CGH) anunci el otorgamiento de subvenciones que apoyarn el desarrollo y la validacin de tecnologas porttiles y de bajo costo. Estas tecnologas tienen el potencial de mejorar la deteccin temprana, el diagnstico y los tratamientos no invasivos o mnimamente invasivos de varios tipos de cncer con una prevalencia particularmente alta en ciertos pases con economas de ingreso bajo y mediano.