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1

El modelo DRAG–España (IDE 1): Análisis de los principales factores de influencia en el número de accidentes en las carreteras Españolas  

Microsoft Academic Search

Resumen  En este trabajo se presentan los principales resultados obtenidos de los modelos de accidentes con heridos y accidentes mortales\\u000a ocurridos en carreteras interurbanas españolas, en el período 1990–2004, desarrollados en base a la metodología de modelos\\u000a econométricos DRAG (Demand Demande Routière, Accidents et Gravité). Las 19 variables utilizadas para el ajuste de los modelos\\u000a DRAG–España (I-DE 1), son de distinta

F. Aparicio; B. Arenas; E. Bernardos; A. Gómez

2009-01-01

2

Factors associated with late HIV testing for Latinos diagnosed with AIDS in Los Angeles  

Microsoft Academic Search

Latinos are more likely to test late for HIV infection compared to other racial\\/ethnic groups in the United States. A population-based interview study was used to examine factors associated with late HIV testing for Latinos diagnosed with AIDS in Los Angeles County (LAC) to develop more effective HIV testing outreach strategies. Latinos testing for HIV within one year of an

Amy Rock Wohl; Judith Tejero; Douglas M. Frye

2009-01-01

3

Estados que requieren cobertura de los costos de estudios clínicos  

Cancer.gov

Una lista de búsqueda y el mapa de los estados de EE.UU. requieren que los planes de salud para pagar los costos de la atención del paciente asociados con ensayos clínicos. Las principales disposiciones se resumen.

4

A Unique High Duty Factor Series Hard-Tube Moduiator for Use in the Los Alamos Meson Physics Facility  

Microsoft Academic Search

The design criteria for the Los Alamos Meson Physics Facility (LAMPF) specifies an initial capability for 6% duty factor (DF), 16.7-mA peak beam current (1-mA average) with provisions for eventual operation at a 12% DF, 8.3-mA peak beam current (also 1-mA average). The first four accelerator cavities in LAMPF will be of the Alvarez type operating at 201.25 MHz and

J. Ross Faulkner

1969-01-01

5

Higher Reading Achievement in Los Angeles Title I Elementary Schools: An Exploratory Study of Underlying Factors.  

ERIC Educational Resources Information Center

An exploratory study was carried out in four Los Angeles Title I elementary schools to determine what accounted for the comparatively high reading scores made by these schools' students on the Comprehensive Tests of Basic Skills; determine whether the schools were engaged in demonstrably effective educational practices that other Title I and…

Dorr-Bremme, Donald W.

6

Prevalence and factors associated with Trichomonas vaginalis infection among high-risk women in Los Angeles.  

PubMed

Remnant specimen from 1215 women screening for chlamydia/gonorrhea at 4 different venue types (sexually transmitted disease clinics, home-test kit users, juvenile and adult detention) in Los Angeles, California, were tested for Trichomonas vaginalis. Prevalence of T. vaginalis varied by screening population, and concurrent chlamydia or gonorrhea was independently associated with T. vaginalis. PMID:24275733

Javanbakht, Marjan; Stirland, Ali; Stahlman, Shauna; Smith, Lisa V; Chien, Michael; Torres, Ruel; Guerry, Sarah

2013-10-01

7

Factors predicting the capacity of Los Angeles city-region recreation programs to promote energy expenditure.  

PubMed

An audit of recreation programs with moderate or higher levels of physical activity (PA) in Los Angeles area cities (N=82) was conducted using internet, telephone, and survey methods. Metabolic Equivalents (METs) were used to code programs? physical activity intensity. MET-hours per recreation program was associated with required age for enrollment, percent of residents >64 years of age, and fiscal capacity of cities. Capacity to promote energy expenditure may depend on targeted age groups, age of population, and municipal fiscal capacity. Cities with lower fiscal capacity might offer those higher MET-hour activities which require less specialized equipment and seek outside funding to offer higher MET programs. PMID:24755531

Reynolds, Kim D; Dahmann, Nicholas; Wolch, Jennifer; Joassart-Marcelli, Pascale; Dunton, Genevieve; Rudulph, Diana; Newell, Joshua; Thayer, Jennifer; Jerrett, Michael

2014-07-01

8

Expanding Urban Metabolism: Coupling Methodologies and Integrating Social Factors, a Pilot for Los Angeles County  

NASA Astrophysics Data System (ADS)

Urban metabolism is a powerful method for describing resource flows into cities and the waste streams produced as a result of resource use. To date these flows have rarely been geospatially correlated to reveal who uses what type of energy where and the concomitant waste streams. Thus there is little ability to understand energy use in urban areas. Additionally, the social and ecological footprint of the flows have not been drawn and explained. We are developing an expanded and integrated urban metabolism analysis for Los Angeles County, attempting to integrate socio-demographic and geospatial grounding of resource flows and sinks, as well as life cycle, cradle to grave information. This presentation will focus on the reasons for this approach and methodological innovations and challenges.

Pincetl, S.

2011-12-01

9

Colombia: Los problemas de competitividad de un país en conflicto  

Microsoft Academic Search

La persistencia del conflicto interno en Colombia inhibe todos los elementos principales que contribuyen a la determinación de la competitividad de la economía nacional, que son los siguientes: (i) el monto de sus recursos productivos; (ii) la calidad y productividad de los mismos; (iii) la eficiencia con que operan sus mercados; (iv) el estado de su infraestructura; (v) la capacidad

Alberto Melo

2003-01-01

10

LOS FACTORES DE ÉXITO EN LAS EMPRESAS DE HOSPEDAJE Y DESAYUNO (BED & BREAKFAST) 4 Y 3 DIAMANTES DEL ESTADO DE GUANAJUATO  

Microsoft Academic Search

La industria turística, llamada por muchos “la industria sin chimeneas”, es una de las actividades económicas con mayor impulso en México, la inmigración de adultos extranjeros con fines de inversión, ha provocado sin duda la aparición de unidades económicas denominadas Bed and Breakfast. La finalidad del trabajo es realizar un análisis de los factores de éxito administrativo de estos negocios

Campos Alvarado; Guzmná Soria Eugenio; De la Garza Carranza María Teresa; Campos Olalde Ofelia

2007-01-01

11

Les systèmes internationaux de protection radiologique : Principales structures et défis actuels  

Microsoft Academic Search

Depuis la prise de conscience, au début des années 1900, du fait que l’exposition aux rayonnements ionisants pouvait produire des effets néfastes sur la santé, les radioprotectionnistes ont collaboré à l’établissement d’une base scientifique permettant de décrire les risques liés aux rayonnements, de recommander les principales pratiques de protection contre ces risques et d’élaborer des normes internationales et des règlements

Edward Nicholas Lazo

2007-01-01

12

La historia de los servicios públicos en las ciudades gallegas: un programa de investigación  

Microsoft Academic Search

El trabajo expone los objetivos y los resultados de un programa de investigación desarrollado desde hace una década en el seno de la Universidade da Coruña, en el que se analiza la implantación y desarrollo de los principales servicios públicos en las ciudades gallegas, desde una perspectiva histórica. Se parte de la constatación de la creciente importancia atribuida a las

Alberte Martínez López; Jesús Mirás Araujo

2007-01-01

13

Human factors aspects of the major upgrade to control systems at the Los Alamos National Laboratory Plutonium Facility  

Microsoft Academic Search

The Plutonium Facility (TA-55) at Los Alamos National Laboratory (LANL) has been in operation for over 15 years. It handles projects such as: stockpile maintenance, surveillance, and dismantlement; pit rebuild; plutonium power source fabrication for long duration spacecraft missions (e.g., Cassini); nuclear materials technology research; nuclear materials storage; and remediation of nuclear waste. The Operations Center of TA-55 is the

J. Higgins; N. Pope

1997-01-01

14

El Informe Anual a la Nación indica que las tasas de mortalidad por cáncer continúan declinando. Se observan tasas menores de cáncer en las poblaciones latinas de los Estados Unidos.  

Cancer.gov

Un informe nuevo de las principales organizaciones oncológicas de la nación informa que el riesgo de los estadounidenses de morir por cáncer continúa descendiendo, y que mantiene una tendencia que comenzó a principios de los años noventa. Preguntas y respuestas

15

Vaccination levels in Los Angeles public health centers: the contribution of missed opportunities to vaccinate and other factors.  

PubMed Central

We abstracted 752 randomly selected records of 2-year-old children at 5 public health centers in Los Angeles. Only 27% of the children were up-to-date in their vaccinations by 2 years of age. Being up-to-date was strongly associated with the number of missed opportunities to vaccinate and number of well child visits. Missed opportunities to vaccinate occurred during 52% of all visits and were associated with minor illness diagnoses and inaccurate immunization status assessment by nurses. Frequent missed opportunities to vaccinate and inadequate numbers of well child visits may result in low immunization levels among children attending public health clinics.

Wood, D; Pereyra, M; Halfon, N; Hamlin, J; Grabowsky, M

1995-01-01

16

Medicina integrativa en Am?rica: De qu? forma se est? practicando la medicina integrativa en los centros cl?nicos en los Estados Unidos  

PubMed Central

RESUMEN EJECUTIVO El impulso para desarrollar e implementar estrategias de medicina integrativa está enraizado en el deseo de mejorar la atención al paciente. The Bravewell Collaborative, una organización sin ánimo de lucro dedicada a la mejora de la atención sanitaria, define la medicina integrativa como “un enfoque de la medicina que coloca al paciente en el centro y se dirige al conjunto completo de influencias físicas, emocionales, mentales, sociales, espirituales y ambientales que afectan a la salud de la persona. Con una estrategia personalizada que considera las condiciones, necesidades y circunstancias únicas del paciente, utiliza las intervenciones más apropiadas de una variedad de disciplinas científicas para curar la afección y la enfermedad y ayudar a las personas a recobrar y mantener una salud óptima”. En las pasadas dos décadas, se ha documentado un número creciente de centros clínicos que proporcionan medicina integrativa, el número de facultades y escuelas médicas que enseñan estrategias integrativas, el número de investigadores que estudian intervenciones integrativas, y el número de pacientes que solicitan cuidados integrativos. Pero se desconocía si la medicina integrativa se estaba ofreciendo de manera igual, similar, o dispar. Además, mientras que los estudios anteriores se centraban en la prevalencia y el uso de la medicina complementaria o alternativa (MCA) por parte de los pacientes1,2 o de los médicos en hospitales3, enumerando la utilización de terapias MCA individuales, se había recogido muy poca información con respecto a la práctica real de la medicina integrativa que, por definición, trata a la persona en su conjunto. En 2011, The Bravewell Collaborative encargó una encuesta para determinar la forma en que la medicina integrativa se estaba practicando en los Estados Unidos: (1) describiendo las poblaciones de pacientes y las afecciones sanitarias tratadas más habitualmente; (2) definiendo las prácticas y modelos fundamentales de atención; (3) determinando cómo se reembolsaban los servicios; (4) identificando los valores y los principios subyacentes a la atención; y (5) determinando los factores principales que impulsan una implementación satisfactoria.

Horrigan, Bonnie; Lewis, Sheldon; Abrams, Donald I.; Pechura, Constance

2012-01-01

17

Factors affecting fuel break effectiveness in the control of large fires on the Los Padres National Forest, California  

USGS Publications Warehouse

As wildfires have increased in frequency and extent, so have the number of homes developed in the wildland-urban interface. In California, the predominant approach to mitigating fire risk is construction of fuel breaks, but there has been little empirical study of their role in controlling large fires.We constructed a spatial database of fuel breaks on the Los Padres National Forest in southern California to better understand characteristics of fuel breaks that affect the behaviour of large fires and to map where fires and fuel breaks most commonly intersect. We evaluated whether fires stopped or crossed over fuel breaks over a 28-year period and compared the outcomes with physical characteristics of the sites, weather and firefighting activities during the fire event. Many fuel breaks never intersected fires, but others intersected several, primarily in historically fire-prone areas. Fires stopped at fuel breaks 46% of the time, almost invariably owing to fire suppression activities. Firefighter access to treatments, smaller fires and longer fuel breaks were significant direct influences, and younger vegetation and fuel break maintenance indirectly improved the outcome by facilitating firefighter access. This study illustrates the importance of strategic location of fuel breaks because they have been most effective where they provided access for firefighting activities.

Syphard, Alexandra D.; Keeley, Jon E.; Brennan, Teresa J.

2011-01-01

18

Baseline Risk Factors that Predict the Development of Open-angle Glaucoma in a Population: The Los Angeles Latino Eye Study  

PubMed Central

Objective To determine which baseline socio-demographic, lifestyle, anthropometric, clinical, and ocular risk factors predict the development of open-angle glaucoma (OAG) in an adult population. Design A population-based, prospective cohort study. Participants A total of 3,772 self-identified Latinos aged 40 years and older from Los Angeles, California who were free of OAG at baseline. Methods Participants from the Los Angeles Latino Eye Study had standardized study visits at baseline and 4-year follow-up with structured interviews and a comprehensive ophthalmologic examination. OAG was defined as the presence of an open angle and a glaucomatous visual field abnormality and/or evidence of glaucomatous optic nerve damage in at least one eye. Multivariate logistic regression with stepwise selection was performed to determine which potential baseline risk factors independently predict the development of OAG. Main Outcome Measure Odds ratios for various risk factors. Results Over the 4-year follow-up, 87 participants developed OAG. The baseline risk factors that predict the development of OAG include: older age (odds ratio [OR] per decade, 2.19; 95% confidence intervals [CI], 1.74-2.75; P<0.001), higher intraocular pressure (OR per mmHg, 1.18; 95% CI, 1.10-1.26; P<0.001), longer axial length (OR per mm, 1.48; 95% CI, 1.22-1.80; P<0.001), thinner central cornea (OR per 40 ?m thinner, 1.30; 95% CI, 1.00-1.70; P=0.050) higher waist to hip ratio (OR per 0.05 higher, 1.21; 95% CI, 1.05-1.39; P=0.007) and lack of vision insurance (OR, 2.08; 95% CI, 1.26-3.41; P=0.004). Conclusions Despite a mean baseline IOP of 14 mmHg in Latinos, higher intraocular pressure is an important risk factor for developing OAG. Biometric measures suggestive of less structural support such as longer axial length and thin CCT were identified as important risk factors. Lack of health insurance reduces access to eye care and increases the burden of OAG by reducing the likelihood of early detection and treatment of OAG.

Jiang, Xuejuan; Varma, Rohit; Wu, Shuang; Torres, Mina; Azen, Stanley P; Francis, Brian A.; Chopra, Vikas; Nguyen, Betsy Bao-Thu

2012-01-01

19

A human factors approach towards the design of a new glovebox glove for Los Alamos National Laboratory  

SciTech Connect

Present day glovebox gloves at Los Alamos National Laboratory (LANL) are underdeveloped and ergonomically inaccurate. This problem results in numerous sprain and strain injuries every year for employees who perform glovebox work. In addition to injuries, using the current glovebox glove design also contributes to breaches and contamination. The current glove used today at LANL has several problems: (1) The length of the fingers is incorrect, (2) the web spacing between the fingers is nonexistent, (3) the angles between each digit on the finger are incorrect, (4) the thumb is placed inaccurately, and (5) the length of the hand is incorrect. These problems present a need to correct the current glove design to decrease the risk of injuries, breaches, and contamination. Anthropometrics were researched to help find the best range of hand measurements to fix the current glove design. Anthropometrics is the measure of the human physical variation. Anthropometrics for this study were gathered from the American National Survey (ANSUR) data that was conducted by the U.S Army in 1988. The current glovebox glove uses anthropometrics from the 95th to 105th percentile range which is too large so the new gloves are going to implement data from a smaller range of percentile groups. The 105th percentile range represents measurements that exceed the human population but are needed to fit certain circumstance such as wearing several under gloves within the glovebox gloves. Anthropometrics used in this study include: 105th percentile measurements for joint circumference which was unchanged because the room for under gloves plus ease of hand insertion and extraction is needed, 80th percentile measurements for crotch length to allow workers to reach the web spacing in the glove, 20th percentile measurements for finger length to allow workers to reach the end of the glove, standard 10.5cm hand breadth to allow more room to accommodate under gloves, 45 degrees abduction angle for the thumb for better positioning, 45 degrees extension angle for the thumb for better positioning, and various angles for the other fingers to allow a more relaxed and natural fit. 3D modeling was used to implement the anthropometric data listed above onto an existing scanned solid model of a human hand. SolidWorks 2010 3-D modeling package was utilized to manipulate the hand model to represent the anthropometric data researched. The anthropometrics and modifications were reviewed by the University of New Mexico Department of Orthopedics hand surgeons. After all modifications and reviews were completed the model was printed out using stereolithography. The printed out model of the hand was used as a mold to create a prototype glovebox glove. The new mold was taken to Piercan USA to produce a 20mil Polyurethane/Hypalon glovebox glove. The Minnesota Dexterity test and Purdue Pegboard test were used to measure the dexterity of the prototype glovebox glove against a current 15 mil Hypalon LANL glovebox glove. Using the data from the tests a student t test was used to determine if there was a significant difference between the current hypalon glove results and the new prototype glove results. With a 95% confidence level the prototype showed to have a significantly lower mean difference from the current hypalon glovebox glove with the Minnesota Dexterity test. With a 95% confidence level the prototype showed to have a significantly higher mean difference from the current hypalon glovebox glove with the Purdue Pegboard test. A p value method was also performed to confirm the results of the student t test. A survey was also given to glovebox workers to determine if they preferred the new design. The best reaction from glovebox workers was the new thumb position, 73.2% of the sample population agreed with the new thumb position. Developing a new glovebox glove will improve the ergonomics of the hand for work performed, decrease exposure time, decreasing risk of breaching, increasing productivity, reducing injuries, and improving work performance. In the future the new glovebox

Oka, Jude M. [Los Alamos National Laboratory

2012-08-06

20

Informe Anual a la Nación indica que los índices generales de cáncer siguen disminuyendo; su sección especial destaca las tendencias actuales y pronósticos del cáncer colorrectal  

Cancer.gov

Los índices de casos nuevos diagnosticados y los índices de muertes de todos los tipos de cáncer combinados disminuyeron en forma considerable en el período más reciente para hombres y mujeres en general, y para la mayoría de las poblaciones raciales y étnicas de Estados Unidos, según un informe de las principales organizaciones de salud y oncológicas.

21

LOS CONTRATOS DE CONSTRUCCIÓN EN COLOMBIA E IMPACTO AL ADOPTAR ESTÁNDARES INTERNACIONALES DE INFORMACIÓN FINANCIERA NIC 11-  

Microsoft Academic Search

Resumen En el presente trabajo se tratan los principales aspectos contables a tener en cuenta en el manejo de los contratos de construcción en Colombia al adoptar estándares internacionales de información financiera, permitiendo visualizar el impacto que tendría en el país la adopción de la Norma Internacional de Contabilidad NIC 11 denominada Contratos de Construcción, en las empresas admitidas a

HELIO FABIO RAMÍREZ ECHEVERRY; LUIS EDUARDO SUÁREZ BALAGUERA

2010-01-01

22

If You Provide the Test, They will Take It: Factors Associated with HIV/STI Testing in a Representative Sample of Homeless Youth in Los Angeles*  

PubMed Central

Homeless youth are at high risk for human immunodeficiency virus (HIV) and other sexually transmitted infections (STI), yet those at greatest risk may never have been tested for HIV or STI. In a probability sample of sexually active homeless youth in Los Angeles (n =305), this study identifies factors associated with HIV/STI testing status. Most youth (85%) had ever been tested and 47% had tested in the past 3 months. Recent testing was significantly more likely among youth who self-identified as gay, were Hispanic, injected drugs, and used drop-in centers, and marginally more likely among youth with more depressive symptoms. Drop-in center use mediated the association of injection drug use with HIV/STI testing. HIV/STI testing was unrelated to sexual risk behavior. Drop-in centers can play an important role in facilitating testing, including among injection drug users, but more outreach is needed to encourage testing in other at-risk subgroups.

Ober, Allison J.; Martino, Steven C.; Ewing, Brett; Tucker, Joan S.

2012-01-01

23

Los grandes telescopios ópticos e infrarrojos  

NASA Astrophysics Data System (ADS)

Recientemente se han puesto en funcionamiento telescopios de 8 y 10 metros de diámetro de su espejo primario que están significando un gran avance en las capacidades observacionales de la Astronomía moderna. Igualmente en nuestro país se está construyendo el Gran Telescopio de Canarias (GTC) que situará a la Astronomía española en la vanguardia de esta disciplina. En mi charla hablaré de las oportunidades observacionales que suponen estos grandes telescopios para la Astronomía moderna. Hablaré del GTC y del esfuerzo español por ser actores principales del desarrollo de la Astronomía moderna. Por último, mostraré brevemente los proyectos futuros de grandes telescopios que se están proponiendo a ambos lados del Atlántico.

Rodríguez-Espinosa, J. M.

24

Los Pigmentos Vegetales y la Fotosíntesis  

NSDL National Science Digital Library

En esta lección se examinarán las dos principales clases de pigmentos fotosintéticos: las clorofilas y los carotenoides. Se analizarán sus estructuras bioquímicas y su biosíntesis, y se explicará además la organización de estos pigmentos en los sistemas fotosintéticos, que son complejos proteicos que colectan y convierten la energía luminosa en energía química.

25

Factorize  

NSDL National Science Digital Library

This interactive Java applet helps students explore the relationship between area and multiplication. First, users are asked to input all factor pairs of a given number. Then, selecting each of those factor pairs, the user draws the respective rectangular array by clicking and dragging across a grid. Options include the use of the commutative property (e.g., user must enter both 2x4 and 4x2 for factors of 8 and represent them with different arrays), entering a number of the user's own choice, and an optional scoring feature allowing the user to keep track of the number correct.

2004-01-01

26

Informe Anual a la Nación indica una reducción en los índices de incidencia y mortalidad por cáncer; una sección especial revela amplias variaciones en las tendencias del cáncer de pulmón en los estados  

Cancer.gov

Un nuevo informe de las principales organizaciones oncológicas del país muestra que, por primera vez desde la primera publicación del informe en 1998, tanto el índice de incidencia como el de mortalidad para todos los cánceres combinados están disminuyendo en hombres y mujeres.

27

Sistema de tratamiento y disposicion final de los residuos urbanos en la Region Metropolitana de Salvador, Bahía  

Microsoft Academic Search

Este artículo trata de las innovaciones tecnicas en el tratamiento de los residuos industriales en la región metropolitana de Salvador y las principales medidas adoptadas para una gestión ambiental de la petroquímica en Bahia, Brasil. La adopción de procedimientos y criterios en conformidad con las normativas internacionales añade una nueva dimensión en la gestión del espacio regional.

Hilda Maria de Carvalho Braga

2007-01-01

28

Risk Factors for Penile Cancer: Results of a Population-based Case–Control study in Los Angeles County (United States)  

Microsoft Academic Search

The etiology of penile cancer is poorly understood, with neonatal circumcision being one of the few recognized nondemographic risk factors. Multiple logistic regression was used to analyze interview data from 100 matched case–control pairs; cases of carcinoma in situ (CIS) and invasive carcinoma of the penis were analyzed separately as well as together. Phimosis was strongly associated with invasive carcinoma

Hung-Fu Tseng; Hal Morgenstern; Thomas Mack; Ruth K. Peters

2001-01-01

29

Economía y política en la duración de los Gobiernos: El caso de España (1977-2001)  

Microsoft Academic Search

Desde que en 1896 Lowell publicara un estudio que revisaba la relación entre el poder ejecutivo y los partidos en Europa, han ido apareciendo múltiples trabajos que analizan la permanencia de los gobiernos en el poder. Fue en la década de los noventa, cuando los investigadores comenzaron a utilizar los modelos de duración, con el fin de identificar los factores

Jose Luis Sáez Lozano

2002-01-01

30

Natural Gas Price Increases in Los Angeles.  

National Technical Information Service (NTIS)

Natural gas price increases in recent years captured congressional and public attention. To determine which factors contributed to an average price increase of 61 percent in the Los Angeles, California, area between April 1981 and April 1983, GAO obtained...

1984-01-01

31

Se identifica una relación entre la falta de exámenes de detección y una gran parte de los casos de cáncer de seno en la etapa avanzada  

Cancer.gov

Los autores de un estudio publicado el 20 de octubre de 2004 en la revista Journal of the National Cancer Institute1? declaran que las dos prioridades principales del sistema de salud deben ser aumentar el porcentaje de exámenes de mamografía e invertir en investigaciones que mejoren la tecnología para detectar el cáncer de seno.

32

Traumatologie du ski et du snowboard chez l’enfant et l’adolescent : épidémiologie, physiopathologie, prévention et principales lésions  

Microsoft Academic Search

Skiing and snowboarding are leading to a risk of injuries in children. Beginners and experienced have higher risk of injuries, however, the first have less severe injuries than the latest. Risk factors of injury are: ability and experience, binding adjustment, slope characteristics, speed, collisions with objects or jumping and risky behavior of the young skiers and snowboarders. Lower limb injuries

B. Dohin; R. Kohler

2008-01-01

33

Factors influencing tropical island freshwater fishes:Species, status, and management implications in puerto rico [Factores que influencian a los peces tropicales de agua dulce: Especies, estado actual e implicaciones para el manejo en Puerto Rico  

USGS Publications Warehouse

Anthropogenic effects including river regulation, watershed development, contamination, and fish introductions have substantially affected the majority of freshwater habitats in Europe and North America. This pattern of resource development and degradation is widespread in the tropics, and often little is known about the resources before they are lost. This article describes the freshwater resources of Puerto Rico and identifies factors that threaten conservation of native fishes. The fishes found in freshwater habitats of Puerto Rico represent a moderately diverse assemblage composed of 14 orders, 29 families, and 82 species. There are fewer than 10 species of native peripherally-freshwater fish that require a link to marine systems. Introductions of nonindigenous species have greatly expanded fish diversity in freshwater systems, and native estuarine and marine species (18 families) also commonly enter lowland rivers and brackish lagoons. Environmental alterations, including land use and development, stream channelization, pollution, and the impoundment of rivers, combined with nonnative species introductions threaten the health and sustainability of aquatic resources in Puerto Rico. Six principal areas for attention that are important influences on the current and future status of the freshwater fish resources of Puerto Rico are identified and discussed.

Wesley, Neal, J.; Lilyestrom, C. G.; Kwak, T. J.

2009-01-01

34

LA MERCADOTECNIA SOCIAL Y LOS DERECHOS DE LOS NIÑOS  

Microsoft Academic Search

Los derechos humanos de los niños son los mas atrasados en que las organizaciones mundiales han prestado atención y son los de mas importancia si lo que buscamos es una sociedad donde se preste atención y se respeten los derechos humanos, el primer lugar donde debemos comenzar es con los niños ya que han crecido generaciones completas de personas en

Gerardo Mauricio Olivares Ramírez; Antonio Castelan Valdivia

2010-01-01

35

Exchange Rate Movements and Adjustment in Financial Markets: Quarterly Estimates for Major Currencies (Fluctuations des taux de change et ajustement sur les marchés financiers: estimations trimestrielles pour les principales monnaies) (Fluctuaciones cambiarias y ajuste en los mercados financieros: Estimaciones trimestrales correspondientes a las principales monedas)  

Microsoft Academic Search

The large swings in real exchange rates among the major industrial countries that have characterized the past decade have created substantial uncertainty regarding the sustainable levels of these rates. In these circumstances, departures of market exchange rates from longer-run equilibrium may not generate large enough speculative shifts in financial portfolios to restore equilibrium. This paper develops a model of portfolio

James M. Boughton

1984-01-01

36

Los Alamos Spheromak program  

SciTech Connect

The Los Alamos Spheromak has two experimental facilities. The confinement properties of sustained and decaying spheromaks are being studied in CTX. Electrodes for the production of clean sustained spheromaks are being developed on the Electrode Studies Facility.

Jarboe, T.R.

1985-01-01

37

Educational and Demographic Profile: Los Angeles County  

ERIC Educational Resources Information Center

This profile uniquely presents a variety of educational and socioeconomic information for Los Angeles County, nearby counties, and the state. The profile highlights the relationship between various factors that affect the economic well-being of individuals and communities. This presentation of information provides a framework for enhanced…

California Postsecondary Education Commission, 2004

2004-01-01

38

¿Qué son los estudios clínicos?  

Cancer.gov

Información que describe los conceptos básicos de los estudios o ensayos clínicos, dónde se llevan a cabo y qué tipos hay de estudios clínicos. También explica las fases de los estudios, la asignación al azar y los miembros del equipo de investigación.

39

Taxquake in Los Angeles  

ERIC Educational Resources Information Center

Outlines educational, personnel, legal, and political considerations facing the Los Angeles Community College District contingency planning committee in their efforts to develop plans to meet budgetary limitations foreseen in the passage of the Jarvis-Gann property tax limitation initiative. (TP)

Koltai, Leslie

1978-01-01

40

LOS ANGELES CATALYST STUDY  

EPA Science Inventory

This report is a summary of the data collected at the Los Angeles Catalyst Study (LACS) from June 1974 through December 1977. Previous reports of the LACS data were presented at the symposium held in April 1977, covering the data through 1976. The current report follows the same ...

41

Children's Hospital Los Angeles  

Cancer.gov

The Pediatric Psychology Program at Children's Hospital Los Angeles (CHLA) consists of outpatient and inpatient hospital-based services that provide therapeutic support and intervention to children and families. The pediatric psychology postdoctoral fellows will participate in varied clinical activities with child and adolescent patients and their families.

42

La inserci?n en el mercado laboral de los inmigrantes latinos en Espa?a y en los Estados Unidos: Diferencias por pa?s de origen y estatus legal  

PubMed Central

Resumen Este artículo compara los resultados económicos entre los inmigrantes latinoamericanos en España y Estados Unidos. Detectamos un efecto de selección por el que la mayoría de los inmigrantes latinoamericanos en España proceden de Sudamérica de un entorno de clases medias, mientras la mayoría de los inmigrantes que van a los Estados Unidos son centroamericanos de clase baja. Este efecto de selección explica las diferencias transnacionales en la probabilidad de empleo, logro ocupacional y salarios obtenidos. A pesar de las diferencias en los orígenes y las características de los latinoamericanos en ambos países, los factores demográficos, humanos y de capital social parecen operar de forma similar en ambos países; y cuando los modelos se estiman separadamente por estatus legal, descubrimos que los efectos se acentúan más entre los inmigrantes irregulares cuando se los compara con los regulares, especialmente en Estados Unidos.

Connor, Phillip; Massey, Douglas

2013-01-01

43

LOS Classification for Urban Rail Transit Passages Based on Passenger Perceptions  

Microsoft Academic Search

The levels of service (LOS) for pedestrian facilities are influenced by a lot of factors and different pedestrians have different perceptions on the LOS. Referring to the method of passengers' perceptions on pedestrian facilities in urban rail transit and the survey idea of stated preference, a questionnaire on the basis of the perception has been conducted to explore the LOS

Shouhua CAO; Zhenzhou YUAN; Chiqing ZHANG; Li ZHAO

2009-01-01

44

Los Alamos Spheromak Program  

SciTech Connect

The Los Alamos Spheromak Program consists of two experimental facilities. The confinement physics of sustained and decaying spheromaks are being studied in CTX, which has an extensive array of diagnostics. Experiments are directed towards extending the physics understanding of the spheromak as a magnetic confinement concept. Electrodes for the production of clean sustained spheromaks are developed on the Electrode Facility, which is more flexible in terms of experimental modifications. Improvements to helicity sources and elecrodes which are proven on the Electrode Facility are then considered for incorporation onto CTX.

Knox, S.O.; Barnes, C.W.; Fernandez, J.C.; Henins, I.; Hoida, H.W.; Klingner, P.L.; Platts, D.A.; Sherwood, A.R.; Wright, B.L.; Jarboe, T.R.

1985-01-01

45

Earthquakes: Los Angeles  

NSDL National Science Digital Library

Although the San Andreas Fault is the longest and one of the most active fault zones in California, it is not responsible for every earthquake in the state. This video segment describes the geologic setting of the San Andreas fault and a network of other active faults, particularly thrust faults, closer to Los Angeles, and explains why these may present a greater danger to the city than the San Andreas Fault. The segment is five minutes fifteen seconds in length. A background essay and discussion questions are included.

46

WPA Maps: Los Angeles  

NSDL National Science Digital Library

Developed as part of President Franklin D. Roosevelt's massive package of assistance programs designed to pull the United States out of the Great Depression, the Works Progress Administration (WPA) was known for employing thousands of artists to paint murals in federal buildings and for also employing thousands of the nations' unemployed in hundreds of massive construction projects around the country. One of these many programs was also designed to create maps of various locales, including many of America's many urban areas. Not surprisingly, one of the areas surveyed by the WPA was Los Angeles. This website, provided by USC, allows users access to 345 hand-colored maps from the 1933-1939 land use survey of the city. The maps themselves identify whether land was vacant or used for commercial, farming, residential, industrial, manufacturing, or recreational purposes. Along with viewing various maps of the different neighborhoods throughout the city, visitors can search the contents of the maps.

47

Los Angeles-Long Beach Harbors, Los Angeles County, California.  

National Technical Information Service (NTIS)

It is proposed to deepen areas in the Los Angeles part of the Los Angeles-Long Beach Harbors and use the fill to create new lands for terminals. The federal part of the proposed project involves the deepening of existing Federal project channels and turni...

1973-01-01

48

Los Angeles Economic Roundtable  

NSDL National Science Digital Library

Since 1983, the L.A. Economic Roundtable has worked on two primary goals: to build a sustainable economy and to create inclusive communities. Producing solid, reliable data to aid policymakers is the Roundtable's area of expertise. The website's "areas of research" and "current projects" will give visitors a good overview of what types of issues the Roundtable addresses. Industrial policy, the labor market, and human services are the areas of research the Roundtable concentrates on, and each area has its own separate link. Some of the papers and presentations that are available in the Human Services area of research include a 129 page downloadable report "Where We Sleep: The Costs of Housing and Homelessness in Los Angeles" and a new report entitled "Dividends of a Hand Up: Public Benefits of Moving Indigent Adults with Disabilities onto SSI". The Roundtable's current projects include research on affordable housing, a crisis indicator to identify high-need homeless people, and the water use efficiency sector's impact on jobs.

49

LOS EFECTOS PSI DE LA \\  

Microsoft Academic Search

Resúmen.- Se obtuvieron los trazos EEG (electroencefalográficos) de 11 miembros de la doctrina del Santo Daimé, una religión shamánica brasilera de Rio de Janeiro, antes y después de ingerir un preparado alcaloide psicoactivo, la \\

Norman S. Don; Bruce E. McDonough; Charles A. Warren; Gilda Moura

50

Los Alamos National Laboratory Overview  

SciTech Connect

Mary Neu, Associate Director for Chemistry, Life and Earth Sciences at Los Alamos National Laboratory, delivers opening remarks at the "Sequencing, Finishing, Analysis in the Future" meeting in Santa Fe, NM

Neu, Mary [Los Alamos National Laboratory

2010-06-02

51

Los Angeles Mass Transit Strike  

NSDL National Science Digital Library

Beginning on Saturday, September 16, 2000, the drivers of the Los Angeles city buses launched a strike, stopping the 2,000 buses, subway, and rail lines that cover the 1,400 square miles of Los Angeles County, and stranding nearly half a million bus riders. The 4,300 members of the United Transportation Union (UTU) are on strike over wages and overtime. The Mass Transit Authority (MTA) of Los Angeles will face a $438 million deficit by 2010 if it does not manage to cut costs. Rather than raise fares, the MTA suggested cutting the cost of drivers's overtime pay by fifteen percent over the next three years, for a saving of $23 million. To do this, the MTA proposed that 400 drivers accept a four-day-a-week work schedule, in which they would be on duty twelve hours a day, but would only be paid for ten hours. Overtime would start only after twelve hours. The strike has already proven itself difficult for the people of Los Angeles. Traffic increased nearly five percent, and those Los Angelenos who depend on public transportation to get to work and school, have been forced to walk, carpool, or ride bikes. According to the MTA, 68 percent of MTA riders have household incomes under $15,000 a year. Talks between the UTU and the MTA were to have resumed on Tuesday morning.

52

INNOVACIÓN EN LOS GOBIERNOS SUBNACIONALES DE MÉXICO: EL CASO DEL ESTADO DE SAN LUIS POTOSÍ  

Microsoft Academic Search

En los últimos años se ha discutido el papel de los gobiernos subnacionales como entes tomadores de decisiones y generadores de política en diversos ámbitos, considerando que las prácticas novedosas y la participación de diversos actores gubernamentales y no gubernamentales son un factor detonante del desarrollo en el diseño e implementación de política pública. Estas nuevas formas —entendidas como innovación—

Mario E. Ibarra Cortés; Erika García Méndez

2010-01-01

53

Results Count in Los Angeles.  

ERIC Educational Resources Information Center

In the Los Angeles Unified School District, 64 percent of its 660 schools increased their norm-referenced test scores from 1998 to 1999. Success stems from a clear, districtwide approach to standards-based learning and broad-based communication about student and school gains. Bancroft Middle School's results-driven approach is profiled. (MLH)

Berman, Ilene M.; Cross, Christopher T.; Evans, Joan

2000-01-01

54

Los Alamos Critical Assemblies Facility.  

National Technical Information Service (NTIS)

The Critical Assemblies Facility of the Los Alamos National Laboratory has been in existence for thirty-five years. In that period, many thousands of measurements have been made on assemblies of exp 235 U, exp 233 U, and exp 239 Pu in various configuratio...

R. E. Malenfant

1981-01-01

55

Los Alamos Science: Number 16.  

National Technical Information Service (NTIS)

It was an unusually stimulating day and a half at Los Alamos when two Nobel Laureates in physiology, a leading paleontologist, and a leading bio-astrophysicist came together to discuss ''Unsolved Problems in the Science of Life,'' the topic of the second ...

N. G. Cooper

1988-01-01

56

LOS SISTEMAS INTEGRADOS DE GESTIÓN  

Microsoft Academic Search

La integración de los Sistemas de Gestión es un objetivo cada vez más generalizado de aquellas empresas que ya tienen implantada una norma de gestión de la calidad y el medio ambiente y que vienen gestionando la seguridad y salud a partir de la propia legislación y normas o modelos publicados. Por esta razón, se precisa de alguna norma ISO

Ana Maria Zayas Ramos; Gioivys Frometa Vázquez; Armenio Pérez Martínez

2008-01-01

57

Los servicios hidrológicos y la conservación de los bosques de México  

Microsoft Academic Search

RESUMEN El manejo de los recursos hídricos es uno de los retos ambientales más importantes que los seres humanos tendrán que enfrentar en este nuevo siglo. En México, una crisis severa causada por el mal manejo del agua está siendo acentuada por las altas tasas de deforestación y la pérdida de los servicios hidrológicos proporcionados por los bosques y selvas

Robert H. Manson

58

Los Alamos Critical Assemblies Facility  

SciTech Connect

The Critical Assemblies Facility of the Los Alamos National Laboratory has been in existence for thirty-five years. In that period, many thousands of measurements have been made on assemblies of /sup 235/U, /sup 233/U, and /sup 239/Pu in various configurations, including the nitrate, sulfate, fluoride, carbide, and oxide chemical compositions and the solid, liquid, and gaseous states. The present complex of eleven operating machines is described, and typical applications are presented.

Malenfant, R.E.

1981-06-01

59

Vacunas contra los virus del papiloma humano  

Cancer.gov

Hoja informativa acerca de las vacunas contra los virus del papiloma humano (VPH) para prevenir infecciones con ciertos tipos de VPH, los cuales son la causa principal del cáncer de cuello del útero o cérvix.

60

Los Angeles and Its Mistress Machine  

ERIC Educational Resources Information Center

Los Angeles city has acute air pollution problems because of lack of an adequate mass transit system and the type of local industries. Air pollution in Los Angeles has affected agricultural production, vegetation, and public health in nearby areas. (PS)

Marx, Wesley

1973-01-01

61

Seguridad del paciente en los estudios clínicos  

Cancer.gov

Información para pacientes, sus familiares y amigos, y el público en general, sobre cómo se protegen los derechos y la seguridad de las personas que participan en estudios clínicos. Conozca sobre el consentimiento formal, los consejos institucionales de revisión (IRB) y cómo se realiza la vigilancia continua de los estudios.

62

Los Alamos Science: Number 16  

SciTech Connect

It was an unusually stimulating day and a half at Los Alamos when two Nobel Laureates in physiology, a leading paleontologist, and a leading bio-astrophysicist came together to discuss ''Unsolved Problems in the Science of Life,'' the topic of the second in a series of special meetings sponsored by the Fellows of the Laboratory. Just like the first one on ''Creativity in Science,'' this colloquium took us into a broader arena of ideas and viewpoints than is our usual daily fare. To contemplate the evolution and mysteries of intelligent life from the speakers' diverse points of view at one time, in one place was indeed a rare experience.

Cooper, N.G. (ed.)

1988-01-01

63

Los Alamos intense neutron source  

SciTech Connect

The intense neutron source is an inertial electrostatic confinement (IEC) fusion device currently under construction at Los Alamos National Laboratory. It is designed to produce 10{sup 11} n/s steady state and will be used for nuclear assay applications. It is being built in a hot cell and will operate with a deuterium-tritium fuel mixture. This device is a three-grid IEC ion focus device. Expected performance has been predicted by scaling from a previous IEC device. In this paper we describe the physics principles of operation of this device, the engineering design parameters, and the empirical scaling used to determine the design parameters.

Nebel, R.A.; Pickrell, M.M.; Barnes, D.C. [Los Alamos National Lab., NM (United States)] [and others

1997-12-01

64

Los Alamos racquetball contamination incident  

SciTech Connect

Several employees of the Los Alamos Plutonium Facility were found to have low levels of radioactivity on their hands and clothing when they arrived for work one morning. The initial concern was that the stringent contamination or material controls at the facility had failed, and that one or more of the employees had either accidentally or intentionally removed plutonium from the Laboratory premises. Fortunately, however, an investigation revealed that the source of the radioactivity was radon daughters electrostatically collected upon the surface of the racquetball and transferred by physical contact to the employees during an early morning racquetball game. This paper describes the events leading to the discovery of this phenomenon. 1 figure.

McAtee, J.L.; Stafford, R.G.; Dowdy, E.J.; Prestwood, R.J.

1985-01-01

65

Declaración sobre los cambios que tendrán lugar próximamente en los programas de estudios clínicos del NCI  

Cancer.gov

Los estudios clínicos son elementos fundamentales en la transformación de los descubrimientos científicos en métodos prácticos para prevenir y tratar el cáncer. En esta declaración, hacemos un resumen de los cambios que están teniendo lugar en las organizaciones que realizan estudios clínicos bajo los auspicios del NCI.

66

Significado de los cambios en los senos: Guía para la salud de la mujer  

Cancer.gov

E-book que describe los cambios o padecimientos específicos de los senos e incluye información sobre cómo se detectan, diagnostican y tratan estos cambios. Aquí se explica que si bien la mayoría de los cambios en los senos no son cancerosos, estos deben ser examinados por un médico. También se ofrece información sobre los pasos a seguir después de un resultado anormal de una mamografía y se incluye una lista de preguntas para el doctor.

67

John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES CITY HALL TWENTY-SEVENTH FLOOR WEST EXTERIOR GALLERY SOUTHEAST STAIR TO PYRAMID, FACING SOUTH - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

68

Monica Griesbach, Photographer August 1997. VIEW OF LOS ANGELES CITY ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Monica Griesbach, Photographer August 1997. VIEW OF LOS ANGELES CITY HALL FIRST FLOOR DOORS TO THE CITY CLERK AND TAX & PERMIT DIVISION OFFICES, FACING NORTH. - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

69

Monica Griesbach, Photographer August 1997. DETAIL OF LOS ANGELES CITY ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Monica Griesbach, Photographer August 1997. DETAIL OF LOS ANGELES CITY HALL FIRST FLOOR SHOWING EAST ELEVATOR LOBBY EXPRESS ELEVATOR DOORS, FACING NORTH. - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

70

Monica Griesbach, Photographer August 1997. DETAIL OF LOS ANGELES CITY ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Monica Griesbach, Photographer August 1997. DETAIL OF LOS ANGELES CITY HALL WEST ENTRANCE COURTYARD NORTHWEST CORNER SHOWING DAMAGED STONE, FACING NORTHWEST. - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

71

Monica Griesbach, Photographer August 1997. DETAIL OF LOS ANGELES CITY ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Monica Griesbach, Photographer August 1997. DETAIL OF LOS ANGELES CITY HALL WEST ENTRANCE COURTYARD SHOWING BRONZE DOORS, LIGHT FIXTURES AND GRILLS, FACING EAST. - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

72

John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES CITY HALL TENTH FLOOR SOUTH WING CAFETERIA FOOD LINE, FACING NORTH - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

73

Epidemiology of pancreas cancer in Los Angeles  

SciTech Connect

The characteristics of the 3614 Los Angeles County residents in whom cancer of the exocrine pancreas was diagnosed during the period 1972-1977 were compared with those of all county residents and patients in whom any cancer was diagnosed during the same period. Seventy-nine percent of the diagnoses had been pathologically verified. This disease still preferentially afflicts the old, the black, and men, although the differences in risk with factors other than age are modest. The disease is not evenly distributed by social class, or over time, although it is not clear that the observed differences reflect etiology. The distributions with respect to important categories of occupation and industry, religion, marital status, geography of residence, and birthplace were rather uniform. Although there is no obvious explanation for any of several unexpected minor inequities in the pattern of incidence, there is no compelling evidence to support any specific environmental cause. There is substantial evidence which is inconsistent with those environmental hypotheses that have been proposed previously.

Mack, T.M.; Paganini-Hill, A.

1981-03-15

74

Distributed processors and intelligent workstations at Los Alamos  

SciTech Connect

The Los Alamos National Laboratory is known for its interest in large-scale and scientific computation. However, since 1978, the Laboratory has developed distributed processing and is now developing a framework for support of microprocessor-based intelligent workstations. As practiced at Los Alamos, distributed processing means the distribution of minicomputers across a relatively large geographical area and the integration of them into a single network. Discussed in this paper are the motivations for the network, the communications technology used, some salient implementation factors, and advantages and disadvantages of distributed processing. Also discussed are the motivations for intelligent workstations, our categorization of workstations, the goals for each category, implementation plans, and some critical issues associated with them.

Buzbee, B.; Slocomb, C.

1983-01-01

75

Los cambios en la velocidad de rotación terrestre y los fenómenos geomagnéticos  

NASA Astrophysics Data System (ADS)

Uno de los aspectos importantes relativos a la geodinámica del interior terrestre es la correlación entre los eventos de cambio en la velocidad de rotación terrestre y los determinados en los elementos del campo geomagnético por ejemplo, la Declinación Magnética, o los coeficientes de los modelos matemáticos de representación global de dicho campo. En este trabajo se presentan los resultados de las características espectrales de los cambios observados en la longitud del día (ldd), y su relación con la estructura espectral de las coeficientes de los modelos matemáticos de campo denominados Campo Internacional Geomagnético de Referencia (CIGR). El intervalo estudiado comprende los últimos 100 años. Los resultados muestran una correlación en las bandas de 60 y 30 años, con posibles períodos mucho mayores que no son posibles determinar a partir de los modelos de CIRG. Se efectúa una simulación a partir de los resultados obtenidos por la aplicación del método de máxima entropía con longitudes del filtro predictor de error comprendida entre el 10% y el 95% de la longitud de la serie analizada. Se observan procesos sicrónicos y asincrónicos que, en muy largos intervalos de tiempos, podrían suponerse como caóticos.

Gianibelli, J. C.

76

Welfare-to-Work Initiatives in California and Los Angeles: Los Angeles City College & Los Angeles Trade Technical College.  

ERIC Educational Resources Information Center

This paper reviews the changes in federal requirements for welfare recipients and the response by California's community colleges, in particular Los Angeles City College (LACC) and Los Angeles Trade Technical College (LATTC), to welfare-to-work legislation. In 1985, the California Legislature enacted GAIN (Greater Avenues for Independence) as its…

Melendez, Edwin; de Montrichard, Alexandra

77

Significado de los cambios en los senos: Guía para la salud de la mujer  

Cancer.gov

Información sobre cambios o padecimientos específicos de los senos y cómo se detectan, diagnostican y tratan estos cambios. Aquí se explica que si bien la mayoría de los cambios en los senos no son cancerosos, estos deben ser examinados por un médico. También se ofrece información sobre los pasos a seguir después de un resultado anormal de una mamografía y se incluye una lista de preguntas para el doctor.

78

Factor XII (Hageman factor) deficiency  

MedlinePLUS

Factor XII deficiency is an inherited disorder that affects a protein (factor XII) involved in blood clotting. ... blood clot. This is called the coagulation cascade. Factor XII is a special protein, called a coagulation ...

79

Impacto del conflicto colombiano en los periodistas  

Microsoft Academic Search

Introducción: Este artículo esboza las dificultades que presentan los periodistas colombianos en su trabajo y caracteriza el impacto del conflicto armado colombiano en su relación con este ejercicio profesional. Método: Los autores realizaron 70 entrevistas a algunos periodistas colombianos que cubren el conflicto. Para el análisis de las entrevistas se intentó entender la lógica de su conducta y cómo representan

Ismael Roldán; Diana Sofía Giraldo; Miguel Ángel Flórez

2008-01-01

80

Los Alamos Forest Fire Impact Modeling  

Microsoft Academic Search

A controlled burn at Bandelier National Monument got out of control and burned about 43,000 acres (17,400 hectares) near Los Alamos, New Mexico, in May 2000. The wildfire caused dramatic changes in infiltration capacity and wettability of soils in many of the watersheds above Los Alamos National Laboratory (LANL) and destroyed the \\

T. Andrew Earles; Kenneth R. Wright; Christopher Brown; Thomas E. Langan

2004-01-01

81

Los valores en niños mexicanos y franceses  

Microsoft Academic Search

Resumen. Se hizo una comparación de los valores morales en niños (de 10 a 12 años), de México y Francia. El estudio se realizó con 202 niños mexicanos y 118 franceses inscritos en quinto y sexto año de educación primaria, utilizando el instrumento de valores de Valdez Medina (2001). Las aplicaciones se hicieron de forma colectiva en los salones de

José Luis Valdez Medina; Norma Ivonne; González-Arratia López; Claudia Cambrón Chi

82

Significant Silence in Elena Garro's "Los Perros"  

ERIC Educational Resources Information Center

Elena Garro's one-act play "Los perros" (1958) confronts the difficult issue of sexual violence in rural Mexico, a problem that persists today. The characters struggle with the social reality of rape, alluding to the threat of sexual violence while avoiding addressing it directly. While words are granted an almost magical power in "Los perros",…

Burke, Jessica

2010-01-01

83

Efectividad de un Programa de Promoción de Actividad Física (PPAF) desde los centros de atención primaria para aumentar los niveles de actividad física en población sedentaria  

Microsoft Academic Search

Introducción. La inactividad física es un factor de riesgo modificable de desarrollo de enfermedades crónicas. La elevada proporción de adultos sedentarios que acuden a los Centros de Atención Primaria (CAP) justifica las intervenciones de promoción de Actividad Física (AF) desde este ámbito. Objetivo. Evaluar la efectividad de un Programa de Promoción de Actividad Física (PPAF) desde Atención Primaria (AP) para

Martin-Borràs Carme; Giné-Garriga Maria; Martín-Cantera Carlos; Puig-Ribera Anna; Duran-Bellido Eulàlia; Solà-Gonfaus Mercè; PPAF grupo

2002-01-01

84

La masa de los grandes impactores  

NASA Astrophysics Data System (ADS)

Los planetas han sido formados fundamentalmente acretando masa a través de colisiones con planetesimales sólidos. La masa más grande de la distribución de planetesimales y las masas máxima y mínima de los impactores, han sido calculadas usando los valores actuales del período y de la inclinación de los planetas (Lissauer & Safronov 1991; Parisi & Brunini 1996). Recientes investigaciones han mostrado, que las órbitas de los planetas gigantes no han sufrido variaciones con el tiempo, siendo su movimiento regular durante su evolución a partir de la finalización de la etapa de acreción (Laskar 1990, 1994). Por lo tanto, la eccentricidad actual de los planetas gigantes se puede utilizar para imponer una cota máxima a las masas y velocidades orbitales de los grandes impactores. Mediante un simple modelo dinámico, y considerando lo arriba mencionado, obtenemos la cota superior para la masa del planetesimal más grande que impactó a cada planeta gigante al final de su etapa de acreción. El resultado más importante de este trabajo es la estimación de la masa máxima permitida para impactar a Júpiter, la cúal es ~ 1.136 × 10 -1, siendo en el caso de Neptuno ~ 3.99 × 10 -2 (expresada en unidades de la masa final de cada planeta). Además, fue posible obtener la velocidad orbital máxima permitida para los impactores como una función de su masa, para cada planeta. Las cotas obtenidas para la masa y velocidad de los impactores de Saturno y Urano (en unidades de la masa y velocidad final de cada planeta respectivamente) son casi las mismas que las obtenidas para Júpiter debido a que estos tres planetas poseen similar eccentricidad actual. Nuestros resultados están en buen acuerdo con los obtenidos por Lissauer & Safronov (1991). Estas cotas podrían ser utilizadas para obtener la distribución de planetesimales en el Sistema Solar primitivo.

Parisi, M. G.; Brunini, A.

85

The Los Alamos National Laboratory Nuclear Vision Project  

SciTech Connect

Los Alamos National Laboratory has initiated a project to examine possible futures associated with the global nuclear enterprise over the course of the next 50 years. All major components are included in this study--weapons, nonproliferation, nuclear power, nuclear materials, and institutional and public factors. To examine key issues, the project has been organized around three main activity areas--workshops, research and analyses, and development of linkages with other synergistic world efforts. This paper describes the effort--its current and planned activities--as well as provides discussion of project perspectives on nuclear weapons, nonproliferation, nuclear energy, and nuclear materials focus areas.

Arthur, E.D.; Wagner, R.L. Jr.

1996-09-01

86

LA POLÍTICA DE GESTIÓN DE RESIDUOS: LOS ACEITES USADOS  

Microsoft Academic Search

Los aceites usados son un residuo peligroso cuya gestión inadecuada puede provocar graves daños al medio ambiente. Además, tienen un in- dudable valor económico debido a que conservan gran parte de los hi- drocarburos que los aceites lubricantes contenían originalmente. La reco- gida de los aceites usados constituye la condición necesaria para conseguir una gestión adecuada de los mismos. La

ASUNCIÓN ARNER; RAMÓN BARBERÁN; JESÚS MUR

2006-01-01

87

EDAD AVANZADA Y FACTORES DE RIESGO PARA INFARTO AGUDO DE MIOCARDIO  

Microsoft Academic Search

Resumen Este estudio caso-control analizó en los sujetos añosos el rol de los factores de riesgo coronario en el desarrollo del infarto agudo de miocardio (IAM), estableció la naturaleza de esta asociación y el gra- do de riesgo. Los datos fueron obtenidos en una investigación que incluyó 1060 casos y 1071 controles, realizada en 35 unidades coronarias de centros médicos

MARIO A. CIRUZZI; HERMAN SCHARGROSKY; PALMIRA PRAMPARO; JORGE ROSLOZNIK; HORACIO ZYLBERSZTEJN; MONICA HAQUIM; VIVIANA RUDICH; ALBERTO CACCAVO; DANIEL PISKORZ

88

Factor Game  

NSDL National Science Digital Library

The Factor Game engages students in a contest in which winning strategies involve distinguishing between numbers with many factors and numbers with few factors. Students are then guided through an analysis of game strategies and introduced to the definitions of prime and composite numbers.

Mathematics, National C.

2009-07-22

89

New Rad Lab for Los Alamos  

SciTech Connect

The topping out ceremony for a key construction stage in the Los Alamos National Laboratory's newest facility, the Radiological Laboratory Utility & Office Building. This is part of the National Nu...  

2008-08-06

90

Volcanology at the Los Alamos Scientific Laboratory.  

National Technical Information Service (NTIS)

This mini-review briefly describes the research conducted at Los Alamos Scientific Laboratory (LASL) on various areas in volcanology. Areas of research include volcanic hazard analysis, the climatic effects of volcanic eruptions, young volcanic fields as ...

G. Heiken

1980-01-01

91

New Rad Lab for Los Alamos  

ScienceCinema

The topping out ceremony for a key construction stage in the Los Alamos National Laboratory's newest facility, the Radiological Laboratory Utility & Office Building. This is part of the National Nu...  

92

Materials Accounting at Los Alamos National Laboratory.  

National Technical Information Service (NTIS)

The materials accounting system at Los Alamos has evolved from an ''80-column'' card system to a very sophisticated near-real-time computerized nuclear material accountability and safeguards system (MASS). The present hardware was designed and acquired in...

N. J. Roberts B. H. Erkkila H. F. Kelso

1985-01-01

93

Environmental surveillance at Los Alamos during 1994  

SciTech Connect

This report describes environmental monitoring activities at Los Alamos National Laboratory for 1994. Data were collected to assess external penetrating radiation, airborne emissions, liquid effluents, radioactivity of environmental materials and food stuffs, and environmental compliance.

NONE

1996-07-01

94

New Rad Lab for Los Alamos  

ScienceCinema

The topping out ceremony for a key construction stage in the Los Alamos National Laboratory's newest facility, the Radiological Laboratory Utility & Office Building. This is part of the National Nu...  

None

2010-01-08

95

COMPOSITION OF AEROSOLS OVER LOS ANGELES FREEWAYS  

EPA Science Inventory

In October of 1976, aerosol particulate samples were collected while driving on Los Angeles freeways and were analyzed for sulfate, nitrate, and elemental composition. The measurements indicate that neither nitrate nor sulfate concentrations increased significantly over the roadw...

96

Shuttle Endeavour Flyover of Los Angeles Landmarks  

NASA Video Gallery

Space shuttle Endeavour atop NASA's Shuttle Carrier Aircraft flew over many Los Angeles area landmarks on its final ferry flight Sept. 21, 2012, including the Coliseum, the Hollywood Sign, Griffith...

97

A Model of Inflation and Its Performance in the Seven Main Industrial Countries, 1958-76 (Un modèle d'inflation et son application dans les sept principaux pays industrialisés, 1958-76) (Modelo de inflación y su comportamiento en los siete países industriales principales, 1958-76)  

Microsoft Academic Search

This paper develops a model of inflation against the background of the recent literature. The model allows for a number of systematic determinants of the inflation process. These determinants include (i) inflationary expectations, (ii) changes in money, as regards their role in expectations, (iii) economic activity, represented alternatively by the level of the output gap and the change in real

1978-01-01

98

Edward Teller Returns to LOS Alamos  

NASA Astrophysics Data System (ADS)

I was asked to share some reflections of Edward Teller's return to Los Alamos during my directorship. I met Teller late in his life. My comments focus on that time and they will be mostly in the form of stories of my interactions and those of my colleagues with Teller. Although the focus of this symposium is on Teller's contributions to science, at Los Alamos it was never possible to separate Teller's science from policy and controversy ...

Hecker, Siegfried S.

2010-01-01

99

Internship at Los Alamos National Laboratory  

SciTech Connect

Los Alamos National Laboratory (LANL) is located in Los Alamos, New Mexico. It provides support for our country's nuclear weapon stockpile as well as many other scientific research projects. I am an Undergraduate Student Intern in the Systems Design and Analysis group within the Nuclear Nonproliferation division of the Global Security directorate at LANL. I have been tasked with data analysis and modeling of particles in a fluidized bed system for the capture of carbon dioxide from power plant flue gas.

Dunham, Ryan Q. [Los Alamos National Laboratory

2012-07-11

100

44. GATES FOR REPLENISHING OWENS LAKE VIEW EAST Los ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

44. GATES FOR REPLENISHING OWENS LAKE VIEW EAST - Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

101

Los Alamos Space Weather Summer School  

NASA Astrophysics Data System (ADS)

Los Alamos National Lab recently initiated a new summer school specializing on space science, space weather, and instrumentation. The school is geared towards graduate level students and has been established to bring graduate students together with internationally recognized scientists at the Los Alamos National Lab. Students are receiving a prestigious Vela Fellowship to cover relocation expenses and cost of living for the duration of their stay in Los Alamos. For two months students have the opportunity to attend science lectures given by distinguished researchers at LANL. Topics are related to space weather research including plasma physics, radiation belts, numerical modeling, solar wind physics, spacecraft charging, and instrumentation. Students are also working closely with a Los Alamos mentor on exciting space weather science topics with access to Los Alamos GPS and geosynchronous data. The summer school concludes with project presentations by the students in a technical forum. The program is designed for graduate students currently enrolled at US Universities and open to all nationalities. We are presenting an overview of this exciting new program funded by IGPP (Institute of Geophysics and Planetary Physics), the Global Security Directorate, and the Directorate for Science, Technology and Engineering at Los Alamos National Lab.

Koller, J.

2011-12-01

102

Scarabs in the Los Angeles County Museum of Art Part I. Distributed propaganda or intimate protection?  

Microsoft Academic Search

This case study of 79 unprovenanced scarabs and scaraboid amulets in the Los Angeles County Museum of Art addresses glyptics, miniaturisation, distribution, and reception. Meaning and function can only be examined by broadening our investigatory criteria outside of the norm (typological and categorical) to included semiotic, anthropological and psychological factors, allowing an understanding of a scarab as a powerful social

K. M. Cooney; J. Tyrrell

103

ORIGINS OF AEROSOL SULFUR SIZE DISTRIBUTIONS IN THE LOS ANGELES BASIN  

EPA Science Inventory

Low pressure impactor measurements show two distinct types of fine particle sulfur size distributions in Los Angeles. These types have mass median diameters of 0.54 + or - 0.07 micrometers and 0.20 + or - 0.02 micrometers, respectively. Factors which may account for the two distr...

104

K-factor image factorization  

NASA Astrophysics Data System (ADS)

A new computational paradigm is introduced. Other image representation such as Fourier transforms and wavelet decompositions depend on linear superposition of basis functions. The k-factor image factorization reduces an image into a finite or infinite set of contrast-ordered images whose joint product reproduces the original image. It is experimentally found that shadows and noise often fall into factors disjoint from the 'pure' image. The analytical foundations of the k-factor method are given, followed by full factorizations and reconstructions, and future research directions are described that include shadow removal, speckle reduction, medical and military image analysis, and commercial applications.

Johnson, John L.; Taylor, Jaime R.

1999-03-01

105

Factor Game  

NSDL National Science Digital Library

This is an interactive applet game exercises a student's factoring ability. A student can play against the computer or against a friend on grids containing the numbers 1-30, 1-49, or 1-100. Each player in turn chooses a number from the board, and then the opponent claims all of its remaining proper factors. A player's score is the sum of all the numbers and factors she/he has chosen. When there are no numbers remaining with unclaimed factors, the game ends and the player with the greater total is the winner.

Adapted with permission from "Prime Time: Factors and Multiples," Connected Mathematics Project, G. Lappan, J. Fey, W. Fitzgerald, S. Friel and E. Phillips

2000-01-01

106

El mercado de los economistas y el mercado de los sociologos  

Microsoft Academic Search

Este artículo explora la posible ‘fertilización cruzada’ entre la sociología y la economía recurriendo a trabajos sociológicos recientes sobre las relaciones de mercado. Muestra que la principal diferencia entre estas dos disciplinas reside en el tipo de organización social que suponen sus modelos respectivos, y la atribuye a que los investigadores de ambos campos tienen aspiraciones distintas: mientras que los

Pétronille Rème

2005-01-01

107

La definición de dinero, los medios de pago y los cuasidineros en Colombia  

Microsoft Academic Search

De tiempo atrás, los escritores sobre temas monetarios se han ocupado del problema de cómo definir el dinero. Se ha tratado, en breve, de primero establecer un criterio que sirva de fundamento para identificar los activos constitutivos de dinero, y luego, de aplicar el criterio adoptado al caso empírico concreto que se desea analizar. De todas formas, en el discurso

Mauricio Carrizosa

1983-01-01

108

Los derechos de participación como elemento de integración de los inmigrantes  

Microsoft Academic Search

Este informe pretende ofrecer un análisis de la relación entre las diferentes formas de participación social y política de las personas inmigrantes y el proceso de integración en las sociedades de acogida. La integración política de los extranjeros está estrechamente relacionada con los actuales debates sobre la ciudadanía y la inmigración, y se ha convertido en una cuestión emergente en

de Lucas Martín Javier; Añón Roig María José; Galiana Saura Ángeles; García Añón José; Mestre i Mestre Ruth; Miravet Bergón Pablo; Ruiz Sanz Mario; Simó Noguera Carles Xavier; Solanes Corella Ángeles; Torres Pérez Francisco

109

Publications of Los Alamos Research, 1983  

SciTech Connect

This bibliography is a compilation of unclassified publications of work done at the Los Alamos National Laboratory for 1983. Papers published in 1982 are included regardless of when they were actually written. Publications received too late for inclusion in earlier compilations have also been listed. Declassification of previously classified reports is considered to constitute publication. All classified issuances are omitted - even those papers, themselves unclassified, which were published only as part of a classified document. If a paper was published more than once, all places of publication are included. The bibliography includes Los Alamos National Laboratory reports, papers released as non-Laboratory reports, journal articles, books, chapters of books, conference papers either published separately or as part of conference proceedings issued as books or reports, papers publishd in congressional hearings, theses, and US patents. Publications by Los Alamos authors that are not records of Laboratory-sponsored work are included when the Library becomes aware of them.

Sheridan, C.J.; McClary, W.J.; Rich, J.A.; Rodriguez, L.L. (comps.)

1984-10-01

110

Status of Monte Carlo at Los Alamos  

SciTech Connect

At Los Alamos the early work of Fermi, von Neumann, and Ulam has been developed and supplemented by many followers, notably Cashwell and Everett, and the main product today is the continuous-energy, general-purpose, generalized-geometry, time-dependent, coupled neutron-photon transport code called MCNP. The Los Alamos Monte Carlo research and development effort is concentrated in Group X-6. MCNP treats an arbitrary three-dimensional configuration of arbitrary materials in geometric cells bounded by first- and second-degree surfaces and some fourth-degree surfaces (elliptical tori). Monte Carlo has evolved into perhaps the main method for radiation transport calculations at Los Alamos. MCNP is used in every technical division at the Laboratory by over 130 users about 600 times a month accounting for nearly 200 hours of CDC-7600 time.

Thompson, W.L.; Cashwell, E.D.

1980-01-01

111

Publications of Los Alamos research 1980  

SciTech Connect

This bibliography is a compilation of unclassified publications of work done at the Los Alamos National Laboratory for 1980. Papers published in 1980 are included regardless of when they were actually written. Publications received too late for inclusion in earlier compilations have also been listed. Declassification of previously classified reports is considered to constitute publication. All classified issuances are omitted-even those papers, themselves unclassified, which were published only as part of a classified document. If a paper was pubished more than once, all places of publication are included. The bibliography includes Los Alamos National Laboratory reports, papers released as non-laboratory reports, journal articles, books, chapters of books, conference papers published either separately or as part of conference proceedings issued as books or reports, papers published in congressional hearings, theses, and US patents. Publications by Los Alamos authors that are not records of Laboratory-sponsored work are included when the Library becomes aware of them.

Salazar, C.A.; Willis, J.K. (comps.) [comps.

1981-09-01

112

LOS CONCEPTOS RELEVANTES EN EL APRENDIZAJE DE LA GRAFICACIÓN  

Microsoft Academic Search

Resumen: Diversos estudios muestran que los estudiantes tienen dificultades para entender conceptos específicos del cálculo diferencial. Algunos señalan los obstáculos que les representa la integración de los diferentes conceptos en la solución de proble- mas específicos, incluidos los de graficación de funciones. En este estudio se ana- lizan las respuestas de un grupo de estudiantes cuando resuelven estos problemas utilizando

MARÍA TRIGUEROS

2008-01-01

113

Monica Griesbach, Photographer August 1997. DETAIL OF LOS ANGELES CITY ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Monica Griesbach, Photographer August 1997. DETAIL OF LOS ANGELES CITY HALL WEST ENTRANCE COURTYARD SHOWING GRILL AND INSCRIPTION OF "AD 1927 GEORGE E. CRYER, MAYOR," FACING EAST. - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

114

Lipooligosaccharides (LOS) of some Haemophilus species mimic human glycosphingolipids, and some LOS are sialylated.  

PubMed Central

The lipooligosaccharides (LOS) of strains of Haemophilus ducreyi, Neisseria gonorrhoeae, Neisseria meningitidis, and Neisseria lactamica contain epitopes that are antigenically and structurally similar to carbohydrates present in human glycosphingolipids. LOS from strains of Haemophilus influenzae and H. influenzae biogroup aegyptius were tested for the binding of monoclonal antibodies (MAbs) that bind to human glycosphingolipids possessing Gal beta 1-4GlcNAc (MAb 3F11) and Gal alpha 1-4Gal beta 1-4Glc (MAb anti-Pk). In solid-phase radioimmunoassays, the LOS of 18 of 19 H. influenzae type b (Hib), 8 of 19 nontypeable H. influenzae, and 10 of 20 H. influenzae biogroup aegyptius strains bound MAb anti-Pk. The LOS of 13 of 19 Hib, 10 of 16 nontypeable H. influenzae, and 2 of 18 H. influenzae biogroup aegyptius strains bound MAb 3F11. Neuraminidase treatment of the strains increased the binding of MAb 3F11 by more than twofold in 47% of the H. influenzae strains, suggesting that sialic acid occluded the LOS structure recognized by MAb 3F11. The material released from neuraminidase-treated Hib LOS was confirmed to be sialic acid by high-performance anion-exchange chromatography. A recombinant plasmid containing genes involved in Hib LOS biosynthesis directed the expression (assembly) of the 3F11 epitope in Escherichia coli. These studies demonstrate that H. influenzae and H. influenzae biogroup aegyptius express at least two LOS epitopes that are similar to those present in human glycosphingolipids. Sialic acid was present on the LOS of some H. influenzae strains and prevented the binding of MAb 3F11 to its epitope. The oligosaccharide portion of sialylated LOS may also resemble sialylated oligosaccharides present in human glycosphingolipids (gangliosides). Images

Mandrell, R E; McLaughlin, R; Aba Kwaik, Y; Lesse, A; Yamasaki, R; Gibson, B; Spinola, S M; Apicella, M A

1992-01-01

115

SEDs at Los Alamos: A Personal Memoir  

NASA Astrophysics Data System (ADS)

I have written this personal memoir approximately 55 years after the events I describe. It is based almost exclusively on memory, since apart from the diary I kept while on Tinian, I have few documents concerning it. It covers my service in the U.S. Army's Special Engineering Detachment (SED) in Oak Ridge and Los Alamos in 1944-45, on Tinian island, the launching pad for the bombing raids on Japan, in the summer and fall of 1945, and my return to Los Alamos until my discharge in January 1946.

Bederson, Benjamin

2001-03-01

116

Attending School and Learning or Repeating and Leaving. A Study about the Determinants of Grade Repetition and Dropout in Primary School in Honduras. Synthesis of the Study = Asistir y Aprender o Repetir y Desertar. Un Estudio sobre los Factores que Contribuyen a la Repitencia en la Escuela Primaria en Honduras. Sintesis del Informe.  

ERIC Educational Resources Information Center

This paper synthesizes a study designed to identify the factors that contribute to primary school repetition and dropout in Honduras. Data were collected by record reviews; teacher, student, and parent interviews; and a test of Spanish. The sample included 1,253 students in grades 1 and 3 in 40 schools in rural Honduras. The main findings of the…

McGinn, Noel F.; And Others

117

Expresion del receptor de esteroides y xenobioticos (SXR) y del gen de multirresistencia drogas (MDR1) y de los polimorfismos de las enzimas GSTs, SULTs y CYP en tumores vesicales profundos, analisis de su expresion y correlación con otros factores pronósticos  

Microsoft Academic Search

STEROID AND XENOBIOTIC RECEPTOR (SXR), MULTIDRUG RESISTANCE GENE (MDR1) AND GSTs, SULTs AND CYP POLYMORPHISM EXPRESSION IN INVASIVE BLADDER CANCER, ANALYSIS OF THEIR EXPRESSION AND CORRELATION WITH OTHER PROGNOSTIC FACTORS Introduction: Steroid and Xenobiotic Receptor (SXR) has demonstrated its activation by numerous drugs, including cytochrome P450 potent inducers like rifampicina or cotrimazol. The role of SXR is well known, and

Rioja Zuazu J; Bandrés Elizalde E; Rosell Costa D; Rincón Mayans A; Zudaire Bergera J

2007-01-01

118

La política brasileña para los residuos sólidos urbanos. Los planteamientos de catadores y empresarios en sus páginas electrónicas  

Microsoft Academic Search

El gobierno brasileño señala la posibilidad de aprobar la política nacional para los residuos sólidos urbanos (PNRS). La propuesta del Proyecto de Ley 1991\\/07 está en trámite en la cámara de los diputados desde el año 1991. Los senadores mantuvieron una charla con los catadores, empresarios del reciclaje y empresarios de servicios de gestión de residuos sólidos urbanos para conocer

Fábio Fonseca Figueiredo

2008-01-01

119

CALIDAD DE LOS ANÁLISIS DE RIESGO E INSEGURIDAD DE LOS TRANSGÉNICOS PARA LA SALUD AMBIENTAL Y HUMANA  

Microsoft Academic Search

RESUMEN Las plantas transgénicas, en general, cargan genes de resistencia a antibióticos y secuencias que favorecen la transferencia de genes y la inestabilidad. Además es imprevisible el sitio de inserción del transgene, los efectos colaterales y los efectos a los organismos no blancos o en la cadena alimentaria. Tampoco es posible controlar la expresión de los transgenes insertados o la

Rubens Onofre Nodari

2009-01-01

120

Factor Analysis.  

National Technical Information Service (NTIS)

The technique of factor analysis, developed by psychologists, is finding application in many fields of science. This report discusses the method, some applications and gives a detailed description of a FORTRAN II computer program to perform a varimax solu...

D. W. Spencer

1966-01-01

121

Factor Dazzle  

NSDL National Science Digital Library

This interactive online game helps students develop fluency with identifying factors while fostering strategic thinking. A student can play against the computer or against a friend on a 6 by 6 grid containing the numbers 1-36. Each player in turn chooses a number from the board, and then the opponent claims all of its remaining proper factors. A player's score is the sum of all the numbers and factors she/he has chosen. When there are no numbers remaining with unclaimed factors, the game ends and the player with the greater total is the winner. This game is part of NCTM's Calculation Nation project (cataloged separately). Users may login as a guest and play against the computer, or register (free) to challenge other players online.

2011-01-01

122

Trefoil factors  

Microsoft Academic Search

.  The present review will include the mammalian trefoil factors, TFF1, TFF2 and TFF3. It will summarise the amino acid sequences\\u000a from different species, their posttranslational modifications and their structures determined by X-ray analysis and nuclear\\u000a magnetic resonance studies. Trefoil factors all have a well-defined, structurally conserved trefoil domain. The trefoil domain\\u000a consists of 42 or 43 amino acid residues and

L. Thim; F. E. B. May

2005-01-01

123

EL ESTADO EN LOS MONTES DE MARIA  

Microsoft Academic Search

Se pretende en el presente trabajo, mostrar las carcatristicas que presenta el Estado en los Montes de María (1) (departamentos de Sucre y Bolívar, republica de Colombia), en el cual se resalta la naturaleza mafiosa y politiquera de un Estado que ya no existe como tal y que se ha convertido en feudos de la politiquería local. Igualmente, se hace

Daniel Menco Rivera

2009-01-01

124

Bojayá: entre el miedo y los medios  

Microsoft Academic Search

El día en que en la iglesia de Bojayá las FARC hicieron estallar una pipeta de gas que mató a 119 civiles y dejó heridas a otras 90, ese municipio en la ribera del Atrato dejó de ser un desconocido pueblo de la geografía colombiana. Los ojos de la comunidad nacional e internacional se volcaron allí. La masacre se convirtió

Aída Carolina Lancheros Ruiz; Julián Andrés Rincón Ortiz

125

Los premiados con el nobel de economía, \\  

Microsoft Academic Search

Como docente en economía quiero hacer un breve y atrevido comentario. a raíz del otorgamiento del Premio Nobel de Economía 1993 a los profesores Douglas C. North y Robert W. Fogel de las Universidades de Washington (Sant Louis) y Chicago respectivamente, por sus investigaciones en el área de la Historia Económica. La primera opinión expresada por el profesor Douglas al

Hugo Silva S

1994-01-01

126

Small Business Among Koreans in Los Angeles.  

ERIC Educational Resources Information Center

The purpose of this paper is to describe the character of small business among Koreans in Los Angeles, to examine the means by which Koreans are able to enter small business in an economy which clearly is moving in the opposite direction, and to consider why it is that immigrant small business should flourish within monopoly capitalism. Korean…

Bonacich, Edna; And Others

127

Clasificación de los herbicidas  

NSDL National Science Digital Library

Esta lección se enfoca en entender el sistema de clasificación en el cual están organizados los herbicidas. Terminología como clasificación, jerarquía de clasificación, ejemplos de clasificación y un breve resumen de los ocho modos de acción, se discuten en esta lección. Una vez que esto se entiende, es mucho más fácil comprender herbicidas similares y saber por qué estos pueden exhibir ciertos síntomas en malezas y cultivos. Objetivos:Entender la forma en que se clasifican los herbicidas y su importancia en el manejo de la resistencia herbicidaEntender la importancia de la clasificación de los herbicidas por modo de acción, en vez de familiasSer capaz de entender la diferencia entre modo de acción y sitio de acciónSer capaz de diferenciar entre familias de herbicidas, modos de acción, y sitios de acciónEntender nombre común, nombres comerciales y sitios de absorción

128

Water Supply at Los Alamos During 1974.  

National Technical Information Service (NTIS)

The Los Alamos water supply for 1974 consisted of 1624 x 10 exp 6 gal from 16 wells in three fields, with an additional 35 x 10 exp 6 gal from a gallery in Water Canyon. Water-level trends are as anticipated under current pumpage practices. Recommendation...

W. D. Purtymun

1975-01-01

129

Sound Change and Mobility in Los Angeles  

ERIC Educational Resources Information Center

Deals with the shift of the low-back vowel as in 'caught' to a low-central vowel as in 'cot' thereby merging such pairs as caught/cot, dawn/Don, and stalk/stock. The causes and the sociolinguistic implications of this shift are discussed. The majority of the informants were from West Los Angeles. (TL)

Johnson, Lawrence

1975-01-01

130

Chemistry and physiology of Los Angeles smog  

Microsoft Academic Search

Air pollution in the Los Angeles area is characterized by a decrease in visibility, crop damage, eye irritation, objectionable odor, and rubber deterioration. These effects are attributed to the release of large quantities of hydrocarbons and nitrogen oxides to the atmosphere. The photochemical action of nitrogen oxides oxidizes the hydrocarbons and thereby forms ozone, responsible for rubber cracking. Under experimental

A. J. Haagen-Smit

1952-01-01

131

Los Angeles Senior Citizen Lifeline Electricity Rates.  

National Technical Information Service (NTIS)

The Los Angeles Senior Citizen Lifeline Rate, introduced in November 1975, is examined. The program covers over 89,000 homes in which the household head is at least 62 years of age and combined adjusted household income does not exceed $7500 per year. The...

T. J. Sullivan

1979-01-01

132

Female Gang Members from East Los Angeles  

Microsoft Academic Search

East Los Angeles cholas are the female counterparts of the cholos, the latter the street gang members that come from marginal situations and conditions. While there has been little research on female gang members overall, the role of females in the street life is significant. Sisters, girlfriends, and other relatives share the same backgrounds as male gang members but additionally

James Diego VIGIL

2008-01-01

133

Monitoring health in Los Angeles County.  

PubMed Central

The University of California at Los Angeles School of Public Health, in collaboration with the Los Angeles County Department of Health Services, compiled data and developed a standardized format that displayed a comparison of mortality and morbidity data between Los Angeles County, the State of California, and the United States in 1960, 1970, and 1980 for 16 health topic areas. Findings noted both favorable and unfavorable health trends, as well as substantial data collection problems. In 1980, compared with the United States, the Los Angeles County rates for tuberculosis, gonorrhea, syphilis, and hepatitis B were as much as 45 to 128 percent higher, the homicide rate was more than double, and, for the population aged 65 years and over, the cirrhosis of the liver rate was more than 56 percent higher. The myocardial infarction rate was 58 percent lower in the population aged 18 to 64. Problems of inadequate data for many health indicators, lack of comparability in data, and conflicting information from different data sources were noted. These limitations with the data underscore the need to standardize data collection procedures and to extend the parameters on which information is collected. The approach represents a tool that could be used by many health departments to monitor their activities and set future goals.

Janis, J M; Detels, R; Steele, D; Walker, A H

1985-01-01

134

Exploratory Study of Hispanic Officer Recruiting in the Mexican- American Community of South-Central Los Angeles: Implications for the Officer Corps of the Future.  

National Technical Information Service (NTIS)

This thesis examines factors relating to youth interest in joining the Navy among the Hispanic population in South-Central Los Angeles, California. The study begins with a comprehensive review of literature on Hispanics of Mexican origin. Information on y...

J. Hernandez

2003-01-01

135

Los Alamos Fires From Landsat 7  

NASA Technical Reports Server (NTRS)

On May 9, 2000, the Landsat 7 satellite acquired an image of the area around Los Alamos, New Mexico. The Landsat 7 satellite acquired this image from 427 miles in space through its sensor called the Enhanced Thematic Mapper Plus (ETM+). Evident within the imagery is a view of the ongoing Cerro Grande fire near the town of Los Alamos and the Los Alamos National Laboratory. Combining the high-resolution (30 meters per pixel in this scene) imaging capacity of ETM+ with its multi-spectral capabilities allows scientists to penetrate the smoke plume and see the structure of the fire on the surface. Notice the high-level of detail in the infrared image (bottom), in which burn scars are clearly distinguished from the hotter smoldering and flaming parts of the fire. Within this image pair several features are clearly visible, including the Cerro Grande fire and smoke plume, the town of Los Alamos, the Los Alamos National Laboratory and associated property, and Cerro Grande peak. Combining ETM+ channels 7, 4, and 2 (one visible and two infrared channels) results in a false color image where vegetation appears as bright to dark green (bottom image). Forested areas are generally dark green while herbaceous vegetation is light green. Rangeland or more open areas appear pink to light purple. Areas with extensive pavement or urban development appear light blue or white to purple. Less densely-developed residential areas appear light green and golf courses are very bright green. The areas recently burned appear black. Dark red to bright red patches, or linear features within the burned area, are the hottest and possibly actively burning areas of the fire. The fire is spreading downslope and the front of the fire is readily detectable about 2 kilometers to the west and south of Los Alamos. Combining ETM+ channels 3, 2, and 1 provides a true-color image of the greater Los Alamos region (top image). Vegetation is generally dark to medium green. Forested areas are very dark green while herbaceous vegetation is medium green. Rangeland or more open areas appear as tan or light brown. Areas with extensive pavement or urban development appear white to light green. Less densely-developed residential areas appear medium green and golf courses are medium green. The fires and areas recently burned are obscured by smoke plumes which are white to light blue. Landsat 7 data are archived and available from EDC. Image by Rob Simmon, Earth Observatory, NASA Goddard Space Flight Center. Data courtesy Randy McKinley, EROS Data Center (EDC)

2002-01-01

136

Quality factors  

SciTech Connect

The quality factor, Q, is a dimensionless modifier used in converting absorbed dose, expressed in gray (or rad), to dose equivalent, expressed in sievert (or rem). The dose equivalent is used in radiation protection to account for the biological effectiveness of different kinds of radiation. The quality factor is related to both linear energy transfer (LET) and relative biological effectiveness (RBE). The RBE obtained from biological experiments depends in a complex way on the observed biological effect, the specific test organism and the experimental conditions. Judgment is involved, therefore, in the choice of Q. Questions regarding the adequacy of current Q values for neutrons were first raised in a 1980 statement by the National Council on Radiation Protection and Measurements (NCRP) and later in a 1985 statement by the International Commission on Radiological Protection (ICRP). In 1980, the NCRP alerted the technical community to the possibility of a future increase between a factor of 3 to 10 in the Q for neutrons, and in 1985, the ICRP suggested an increase by a factor of 2 in Q for fast neutrons. Both these advisory groups are now recommending essentially the same guidance with regard to Q for neutrons: an increase by a factor of 2. The Q for neutrons is based on a large, albeit unfocused, body of experimental data. In spite of the lack of focus, the data supporting a change in the neutron quality factor are substantial. However, the proposed doubling of Q for neutrons is clouded by other issues regarding its application. These issues are discussed, together with the current database for the neutron quality factor. Improvements are needed to provide better guidance with regard to both Q for neutrons and its application in radiation protection.

Kerr, G.D.

1988-08-01

137

Power Factor  

NSDL National Science Digital Library

All About Circuits is a website that âÂÂprovides a series of online textbooks covering electricity and electronics.â Written by Tony R. Kuphaldt, the textbooks available here are wonderful resources for students, teachers, and anyone who is interested in learning more about electronics. This specific section, Power Factor, is the eleventh chapter in Volume II âÂÂAlternating Current. A few of the topics covered in this chapter include: True, Reactive, and Apparent power; Calculating power factor, and Practical power factor correction. Diagrams and detailed descriptions of concepts are included throughout the chapter to provide users with a comprehensive lesson. Visitors to the site are also encouraged to discuss concepts and topics using the All About Circuits discussion forums (registration with the site is required to post materials).

Kuphaldt, Tony R.

2008-07-10

138

Factorize Two  

NSDL National Science Digital Library

This interactive Java applet helps students explore the relationship between area and multiplication. Users are asked to draw all possible factorizations of a number as rectangular arrays by clicking and dragging across a grid. Options include the use of the commutative property (e.g., user must enter both 2x4 and 4x2 for factors of 8 represented by different orientations of the array), entering a number of the user's own choice, and an optional scoring feature allowing users to keep track of the number correct.

2004-01-01

139

Factor Track  

NSDL National Science Digital Library

This problem helps learners improve their knowledge of factors, especially those in the usual multiplication tables, and encourages the problem solving strategy of trial and error. The goal of the game is to go around the track in as few moves as possible, keeping to the rules that a player can move any number of spaces which is a factor of the number the player is on, except 1. There is a "training" track to play on initially to see the rules in action and then a more complicated track for players to use. The Teachers' Notes page offers suggestions for implementation, key discussion questions, ideas for extension and support.

2011-06-01

140

Factors affecting outcome in liver resection  

PubMed Central

Background. Studies demonstrate an inverse relationship between institution/surgeon procedural volumes and patient outcomes. Similar studies exist for liver resections, which recommend referral of patients for liver resections to ‘high-volume’ centers. These studies did not elucidate the factors that underlie such outcomes. We believe there exists a complex interaction of patient-related and perioperative factors that determine patient outcomes after liver resection. We sought to delineate these factors. Methods. Retrospective review of 114 liver resections by a single surgeon from 1993–2003: Records were reviewed for demographics; diagnosis; type/year of surgery; American Society of Anesthesiologists (ASA) score; preoperative albumin, creatinine, and bilirubin; operative time; intraoperative blood transfusions; epidural use; and intraoperative hypotension. Main outcome measurements were postoperative morbidities, mortalities and length of stay (LOS). Data were analyzed using a multivariate linear regression model (SPSS v10.1 statistical analysis program). Results. Primary indications for resections were hepatocellular carcinoma (HCC) (N=57), metastatic colorectal cancer (N=25), and benign disease (N=18). There were no intraoperative mortalities and 4 perioperative (30-day) mortalities (3.5%). Mortality occurred in patients with malignancies who were older than 50 years. Morbidity was higher in malignant (15.6%) versus benign (5.5%) disease. Complications included bile leak/stricture (N=6), liver insufficiency (N=3), postoperative bleeding (N=2), myocardial infarction (N=2), aspiration pneumonia (N=1), renal insufficiency (N=1), and cancer implantation into the wound (N=1). Average LOS for all resections was 8.6 days. Longer operative time (p=0.04), lower albumin (p<0.001), higher ASA score (p<0.001), no epidural use (p=0.04), and higher creatinine (p<0.001) all correlated positively with longer LOS. ASA score and creatinine were the strongest predictors of LOS. LOS was not affected by patient age, sex, diagnosis, presence of malignancy, intraoperative transfusion requirements, intraoperative hypotension, preoperative bilirubin, case volume per year or year of surgery. Conclusions. Liver resections can be performed with low mortality/morbidity and with acceptable LOS by an experienced liver surgeon. Outcome as measured by LOS is most influenced by patient comorbidities entering into surgery. Annual case volume did not influence LOS and had no impact on patient safety. Length of stay may not reflect surgeon/institution performance, as LOS is multifactorial and likely related to patient population, patient selection and increased high-risk cases with a surgeon's experience.

Lorenzo, Cedric S. F.; Limm, Whitney M. L.; Lurie, Fedor

2005-01-01

141

Neurobiolog?a de la impulsividad y los trastornos de la conducta alimentaria*  

PubMed Central

Resumen Introducción La impulsividad es un rasgo de personalidad multidimensional relacionado con el control del comportamiento y las emociones. Está presente de manera diversa en los trastornos de la conducta alimentaria, particularmente, en la bulimia nerviosa (BN). Aunque la relación entre la impulsividad y BN ha sido objeto de numerosas investigaciones, en la actualidad se desconocen los sustratos neurobiológicos de esta relación. Objetivos Discutir críticamente la evidencia que sugiere que las alteraciones en los sistemas neuronales relacio-nados con las funciones ejecutivas, con la formación de preferencias y con la regulación de los estados emocionales sirven como base para el rasgo de personalidad impulsiva, así como su estado en subgrupos de pacientes con BN. Métodos Búsqueda selectiva de la literatura relevante. Resultados y conclusiones Esta discusión ilustra la complejidad de la relación entre la impulsividad y BN, donde la impulsividad actúa como un factor de vulnerabilidad que puede sensibilizar al sujeto con BN a estados emocionales negativos, durante los cuales modifica el impacto de estímulos internos y externos sobre el comportamiento y su regulación, favoreciendo así patrones de comportamiento maladaptativos e inflexibles.

Orozco-Cabal, Luis Felipe; Herin, David

2009-01-01

142

Facilitating LOS Debriefings: A Training Manual  

NASA Technical Reports Server (NTRS)

This manual is a practical guide to help airline instructors effectively facilitate debriefings of Line Oriented Simulations (LOS). It is based on a recently completed study of Line Oriented Flight Training (LOFT) debriefings at several U.S. airlines. This manual presents specific facilitation tools instructors can use to achieve debriefing objectives. The approach of the manual is to be flexible so it can be tailored to the individual needs of each airline. Part One clarifies the purpose and objectives of facilitation in the LOS setting. Part Two provides recommendations for clarifying roles and expectations and presents a model for organizing discussion. Part Tree suggests techniques for eliciting active crew participation and in-depth analysis and evaluation. Finally, in Part Four, these techniques are organized according to the facilitation model. Examples of how to effectively use the techniques are provided throughout, including strategies to try when the debriefing objectives are not being fully achieved.

McDonnell, Lori K.; Jobe, Kimberly K.; Dismukes, R. Key

1997-01-01

143

The Los Alamos accelerator code group  

SciTech Connect

The Los Alamos Accelerator Code Group (LAACG) is a national resource for members of the accelerator community who use and/or develop software for the design and analysis of particle accelerators, beam transport systems, light sources, storage rings, and components of these systems. Below the authors describe the LAACG`s activities in high performance computing, maintenance and enhancement of POISSON/SUPERFISH and related codes and the dissemination of information on the INTERNET.

Krawczyk, F.L.; Billen, J.H.; Ryne, R.D.; Takeda, Harunori; Young, L.M.

1995-05-01

144

Risk management at Los Alamos National Laboratory  

SciTech Connect

Los Alamos National Laboratory has risk management programs at a number of administrative levels. Each line organization has responsibility for risk management for routine operations. The Facility Risk Management group (HS-3) is the Los Alamos organization with the primary responsibility for risk management including providing input and expertise to facilities and line managers in the management and documentation of ES&H hazards and risks associated with existing and new activities. One of the major contributions this group has made to laboratory risk management program is to develop and implement a hazard identification and classification methodology that is readily adaptable to continuously changing classification guidelines such as DOE-STD-1027. The increased emphasis on safety at Los Alamos has led to the formation of additional safety oversight organization such as the Integration and Coordination Office (ICO), which is responsible for prioritization of risk management activities. In the fall of 1991, nearly 170 DOE inspectors spent 6 weeks analyzing the environmental, safety, and health activities at Los Alamos. The result of this audit was a list of over 1000 findings, each indicating some deficiency in current Laboratory operations relative to DOE and other government regulation. The audit team`s findings were consolidated and ``action plans`` were developed to address the findings. This resulted in over 200 action plans with a total estimated cost of almost $1 billion. The Laboratory adopted a risk-based prioritization process to attempt to achieve as much risk reduction as possible with the available resources. This paper describes the risk based prioritization model that was developed.

Brooks, D.G. [Arizona State Univ., Tempe, AZ (United States); Stack, D.W. [Los Alamos National Lab., NM (United States)

1993-11-01

145

Los Alamos transuranic waste size reduction facility  

SciTech Connect

A transuranic (TRU) Waste Size Reduction Facility (SRF) was designed and constructed at the Los Alamos National Laboratory during the period of 1977 to 1981. This paper summarizes the engineering development, installation, and early test operations of the SRF. The facility incorporates a large stainless steel enclosure fitted with remote handling and cutting equipment to obtain an estimated 4:1 volume reduction of gloveboxes and other bulky metallic wastes.

Briesmeister, A.; Harper, J.; Reich, B.; Warren, J.L.

1982-01-01

146

Los Alamos Team Demonstrates Bottle Scanner Technology  

ScienceCinema

Los Alamos scientists are demonstrating a Nuclear Magnetic Resonance Imaging (NMR) technology that may provide a breakthrough for screening liquids at airport security. By adding low-power X-ray data to the NMR mix, scientists believe they have unlocked a new detection technology. Funded in part by the Department of Homeland Security's Science and Technology Directorate, the new technology is called MagRay.

Espy, Michelle; Schultz, Larry

2014-06-02

147

Los Alamos constant-Q spectrometer  

SciTech Connect

A constant-Q spectrometer, which has been installed on the pulsed source of the Los Alamos Neutron Scattering Center, is described. It features a number of innovations that ease sample and analyser alignment and a novel composite crystal analyzer which exploits the mosaic properties of plastically deformed germanium in a new way. Observations of phonon dispersion in aluminium and of incoherent scattering in ZrH/sub 2/ are reported, along with background measurements. 11 refs., 5 figs., 1 tab.

Robinson, R.A.; Pynn, R.; Eckert, J.; Goldstone, J.A.

1985-01-01

148

Job Listings - Los Alamos National Laboratory  

NSDL National Science Digital Library

Los Alamos National Laboratory is a premier national security research institution, delivering scientific and engineering solutions for the nation's most crucial and complex problems. Our primary responsibility is ensuring the safety, security, and reliability of the nation's nuclear deterrent. In addition to supporting the Lab's core national security mission, our work advances bioscience, chemistry, computer science, earth and environmental sciences, materials science, and physics disciplines.

149

Commercialization of Los Alamos National Laboratory technologies via small businesses. Final report  

SciTech Connect

Over the past decade, numerous companies have been formed to commercialize research results from leading U.S. academic and research institutions. Emerging small businesses in areas such as Silicon Valley, Boston`s Route 128 corridor, and North Carolina`s Research Triangle have been especially effective in moving promising technologies from the laboratory bench to the commercial marketplace--creating new jobs and economic expansion in the process. Unfortunately, many of the U.S. national laboratories have not been major participants in this technology/commercialization activity, a result of a wide variety of factors which, until recently, acted against successful commercialization. This {open_quotes}commercialization gap{close_quotes} exists partly due to a lack, within Los Alamos in particular and the DOE in general, of in-depth expertise and experience in such business areas as new business development, securities regulation, market research and the determination of commercial potential, the identification of entrepreneurial management, marketing and distribution, and venture capital sources. The immediate consequence of these factors is the disappointingly small number of start-up companies based on technologies from Los Alamos National Laboratory that have been attempted, the modest financial return Los Alamos has received from these start-ups, and the lack of significant national recognition that Los Alamos has received for creating and commercializing these technologies.

Brice, R.; Cartron, D.; Rhyne, T.; Schulze, M.; Welty, L.

1997-06-01

150

Exploration geochemistry: The Los Alamos experience  

SciTech Connect

Los Alamos National Laboratory became actively involved in geochemical exploration in 1975 by conducting a reconnaissance-scale exploration program for uranium as part of the National Uranium Resource Evaluation program. Initially, only uranium and thorium were analyzed. By 1979 Los Alamos was analyzing a multielement suite. The data were presented in histograms and as black and white concentration plots for uranium and thorium only. Data for the remaining elements were presented as hard copy data listings in an appendix to the report. In 1983 Los Alamos began using exploration geochemistry for the purpose of finding economic mineral deposits to help stimulate the economies of underdeveloped countries. Stream-sediment samples were collected on the Caribbean island of St. Lucia and a geochemical atlas of that island was produced. The data were statistically smoothed and presented as computer-generated color plots of each element of the multielement suite. Studies for the US Bureau of Land Management in 1984 consisted of development of techniques for the integration of several large data sets, which could then be used for computer-assisted mineral resource assessments. A supervised classification technique was developed which compares the attributes of grid cells containing mines or mineral occurrences with attributes of unclassified cells not known to contain mines or occurrences. Color maps indicate how closely unclassified cells match in attributes the cells with mines or occurrences. 20 refs., 1 fig., 1 tab.

Maassen, L.W.; Bolivar, S.L.

1989-01-01

151

Heat-Loss Factors for Single-Family Homes.  

National Technical Information Service (NTIS)

Home heat-loss factors are developed for 220 locations in the contiguous United States. Heat-loss factors serve as a basic input to the Los Alamos National Laboratory/University of New Mexico solar economic performance model (EASE III). Maximum allowable ...

M. Thayer

1981-01-01

152

Los Angeles County Poor Farm, Patient Wards 201, 202, 203, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Los Angeles County Poor Farm, Patient Wards 201, 202, 203, 204, 205, 206, 207, 208 & 209 - Type A Plan, 7601 Imperial Highway; bounded by Esperanza Street, Hawthorn Avenue, Laurel Street, and Descanso Street, Downey, Los Angeles County, CA

153

Los Angeles County Poor Farm, Patient Ward Nos. 210 & ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Los Angeles County Poor Farm, Patient Ward Nos. 210 & 211 - Type B Plan, 7601 Imperial Highway; bounded by Esperanza Street, Laurel Street, Flores Street, and Descanso Street, Downey, Los Angeles County, CA

154

Los Alamos Personnel and Area Criticality Dosimeter Systems.  

National Technical Information Service (NTIS)

Fissionable materials are handled and processed at the Los Alamos National Laboratory. Although the probability of a nuclear criticality accident is very remote, it must be considered. Los Alamos maintains a broad spectrum of dose assessment capabilities....

D. G. Vasilik R. W. Martin

1981-01-01

155

Transformación de los programas de estudios clínicos del NCI  

Cancer.gov

Información sobre los programas e iniciativas del NCI que patrocinan, realizan, crean o apoyan estudios clínicos, entre los que se incluyen la Red Nacional de Estudios Clínicos (NCTN) y el Programa de Investigación Oncológica Comunitaria (NCORP) del NCI.

156

El problema de estabilidad de los sistemas Hamiltonianos multidimensionales  

NASA Astrophysics Data System (ADS)

Se revisarán los aspectos básicos del problema de estabilidad de sistemans Hamiltonianos N-dimensionales, haciendo especial énfasis en los posibles mecanismos que dan lugar a la aparición de ``caos": overlap de resonancias, difusión de Arnol'd y otros procesos difusivos alternativos. Se mencionarán los aspectos aún no resueltos sobre la estabilidad de los sistemas con N > 2. Finalmente, se discutirá cuáles de estos mecanismos podrían tener alguna relevancia en la dinámica de sistemas estelares y planetarios.

Cincotta, P. M.

157

LOS DADOS CONCEPTUALES: UN JUEGO PARA APRENDER A CONSTRUIR PROPOSICIONES  

Microsoft Academic Search

Durante la elaboración de mapas conceptuales, en ocasiones los docentes y estudiantes tienen problemas al construir proposiciones. Frecuentemente nos encontramos con mapas en donde la secuencia de conceptos desde la raíz del mapa hasta uno de los conceptos terminales forman una larga oración. En algunos casos esto se debe a preconcepciones de parte de los maestros sobre lo que es

Ginnie Hughes; José del Carmen Barrios; Damaris Bernal; Adrián Chang; Alberto J. Cañas

158

La dependencia financiera de los gobiernos locales en México  

Microsoft Academic Search

La distribución de los recursos y potestades tributarias entre los diferentes niveles de gobierno tiene suma importancia para la organización de las tareas económicas del Estado. La eficiencia económica y la función de estabilización macroeconómica requieren de una mayor centralización de ingresos; mientras que, en México, la autonomía de ingresos de los gobiernos locales (estados y municipios), contribuye a que

José Alfredo Tijerina Guajardo; Antonio Medellín Ruiz

2000-01-01

159

Una aplicación de la escala de fobia a los alimentos nuevos. El caso de los alimentos étnicos  

Microsoft Academic Search

RESUMEN: El artículo investiga las actitudes de los consumidores hacia los alimentos nuevos mediante la escala FNS (Food Neo-phobia Scale). A partir de ella se obtiene el perfil de los individuos más y menos proclives a la introducción de nuevos alimentos en sus dietas, denominados respectivamente, «neo-fíli- cos» y «neo-fóbicos». Entre estos alimentos nuevos, los étnicos o propios de un

Dena M. Camarena; Ana I. Sanjuán

160

Materials accounting at Los Alamos National Laboratory  

SciTech Connect

The materials accounting system at Los Alamos has evolved from an ''80-column'' card system to a very sophisticated near-real-time computerized nuclear material accountability and safeguards system (MASS). The present hardware was designed and acquired in the late 70's and is scheduled for a major upgrade in fiscal year 1986. The history of the system from 1950 through the DYMAC of the late 70's up to the present will be discussed. The philosophy of the system along with the details of the system will be covered. This system has addressed the integrated problems of management, control, and accounting of nuclear material successfully. 8 refs., 3 figs., 1 tab.

Roberts, N.J.; Erkkila, B.H.; Kelso, H.F.

1985-07-20

161

Los Alamos National Laboratory passive solar program  

SciTech Connect

Progress in passive solar tasks performed at the Los Alamos National Laboratory for FY-81 is documented. A third volume of the Passive Solar Design Handbook is nearly complete. Twenty-eight configurations of sunspaces were studied using the solar load ratio method of predicting performance; the configuration showing best performance is discussed. The minimum level of insolation needed to generate convective flow in the thermosiphon test rig is noted and measured. Information is also included on test room performance, off-peak auxiliary electric heating for a passive home, free convection experiment, monitored buildings, and technical support to the US Department of Energy.

Neeper, D.A.

1981-01-01

162

Fluctuations in three Los Alamos experiments  

SciTech Connect

We review results from three magnetic fusion experiments at Los Alamos: the ZT-40M, a reversed-field toroidal pinch; the CTX, a spheromak produced by a magnetized coaxial source; and the FRX-C, a field-reversed configuration generated by theta-pinch techniques. These experiments share the common feature that a major fraction of the confining magnetic field is associated with currents carried by the plasma. We emphasize here the important role that fluctuations play in the maintenance and evolution of these configurations.

Wright, B.L.

1983-01-01

163

Los Angeles Examiner Collection, 1920-1961  

NSDL National Science Digital Library

This massive collection from the University of Southern California's Digital Library brings together approximately 1.4 million prints and negatives from the Los Angeles Examiner newspaper. The paper shut down in 1962 when it merged with the afternoon Herald-Express. The collection is divided into two sub-collections: Prints and Negatives. Almost every major and minor event during the time period is represented here. Visitors can get started by browsing through a few suggested topics such as communism, divorces, adoption and orphans, and the Korean War. Visitors can also type in key geographical locales such as West Hollywood, Griffith Observatory, and Olvera Street to find a wide range of images.

2013-01-01

164

The Los Alamos foil implosion project  

SciTech Connect

The goal of the Los Alamos foil implosion project is to produce an intense (>100 TW), multi-megajoule, laboratory soft x-ray source for material studies and fusion experiments. The concept involves the implosion of annular, current-carrying, cylindrical metallic plasmas via their self-magnetic forces. The project features inductive storage systems using both capacitor banks and high explosive-driven flux compression generators as prime energy sources. Fast opening switches are employed to shorten the electrical pulses. The program will be described and activities to date will be summarized.

Brownell, J.H.; Parker, J.V.; Bartsch, R.R.; Benage, J.F.; Bowers, R.L.; Cochrane, J.C.; Forman, P.R.; Goforth, J.H.; Greene, A.E.; Kruse, H.W.; Ladish, J.S; Oona, H.; Peterson, D.L.; Reinvosky, R.E.; Trainor, J.R. [Los Alamos National Lab., NM (United States); Roderick, N. [New Mexico Univ., Albuquerque, NM (United States); Turchi, P. [Ohio State Univ., Columbus, OH (United States)

1992-08-01

165

The Los Alamos foil implosion project  

SciTech Connect

The goal of the Los Alamos foil implosion project is to produce an intense (>100 TW), multi-megajoule, laboratory soft x-ray source for material studies and fusion experiments. The concept involves the implosion of annular, current-carrying, cylindrical metallic plasmas via their self-magnetic forces. The project features inductive storage systems using both capacitor banks and high explosive-driven flux compression generators as prime energy sources. Fast opening switches are employed to shorten the electrical pulses. The program will be described and activities to date will be summarized.

Brownell, J.H.; Parker, J.V.; Bartsch, R.R.; Benage, J.F.; Bowers, R.L.; Cochrane, J.C.; Forman, P.R.; Goforth, J.H.; Greene, A.E.; Kruse, H.W.; Ladish, J.S; Oona, H.; Peterson, D.L.; Reinvosky, R.E.; Trainor, J.R. (Los Alamos National Lab., NM (United States)); Roderick, N. (New Mexico Univ., Albuquerque, NM (United States)); Turchi, P. (Ohio State Univ., Columbus, OH (United States))

1992-01-01

166

Ultraprecision machining of optics at Los Alamos  

SciTech Connect

Ultraprecision machine tools are used at Los Alamos for single point diamond turning of optics and other precision parts. Measurements of a 50-mm-dia copper flat are used to illustrate the quality of a part which can be machined on the Moore No. 3 lathe. Measurements of a 0.4-m-dia aluminum mirror with a 20-m radius-of-curvature are presented as an example of a part machined on the Moore No. 5 lathe. A varying frequency sine wave grating is used to show a type of special optical grating which can be produced using the Pneumo lathe.

Rhorer, R.L.; Gauler, A.L.; Colston, E.W.; Ruhe, J.R.

1981-01-01

167

Lessons learned from occurrences involving procedures at Los Alamos National Laboratory in 1994  

SciTech Connect

This study used the Department of Energy (DOE) Occurrence Reporting and Processing System (ORPS) data to investigate occurrences reported during one year at Los Alamos National Laboratory (LANL). ORPS provides a centralized database and computerized support for the Collection, distribution, updating, analysis, and validation of information in occurrence reports about abnormal events related to facility operation. Human factors causes for occurrences are not always defined in ORPS. Content analysis of narrative data revealed that 33% of all LANL 1994 adverse operational events have human factors causes related to procedures. Procedure-caused occurrences that resulted in injury to workers, damage to facilities or equipment, or a near-miss are analyzed.

Frostenson, C.K.

1995-07-01

168

Factor XII assay  

MedlinePLUS

Hageman factor assay ... test if a family member was diagnosed with factor XII deficiency. ... Decreased factor XII activity may indicate: Inherited (congenital) deficiency of factor XII Liver disease

169

Los Angeles Public Library: Electronic Neighborhood  

NSDL National Science Digital Library

Many urban public library systems across the United States have accumulated large troves of paper ephemera over the years, and the Los Angeles Public Library system is no exception. Funded by a grant from the California State Library, the Fletcher Jones Foundation, and the John Randolph Haynes and Dora Haynes Foundation, the Electronic Neighborhood allows the internet-browsing public access to a number of these documents. The database located here includes a large collection of photographs documenting the city's development, a collection of restaurant menus, and an index to fiction works that take place in and around California. The photo database contains over 2.5 million archival records, and a number of thematic online photo exhibits, including ones that document the 1932 Los Angeles Olympics and golf in Hollywood. The menu database is particularly fascinating, as users can search for a number of restaurant menus from the past century. While not all of the records include scanned menu images, a number of them are already available, such as those from the now-defunct Brown Derby.

170

Los medios de comunicación y las violaciones de los derechos humanos en el área de conflicto  

Microsoft Academic Search

La autora, que actualmente es una refugiada política en Austria, relata su trabajo como periodista palestina en las áreas conflictivas de Israel. Sus experiencias revelan las violaciones de Derechos Humanos y el genocidio cometido por las fuerzas armadas israelíes. Este artículo no sólo condena al estado de Israel sino que también cuestiona la falta de compromiso de los Estados Unidos

Kawther Salam

2006-01-01

171

"Los Ninos y los Libros": Noteworthy Books in Spanish for the Very Young.  

ERIC Educational Resources Information Center

Reviews 15 children's books in Spanish. Titles reviewed include: "Perro y gato [Dog and Cat]" (Ricardo Alcantara); "Baldomero va a la escuela [Baldomero goes to School]" (Alain Broutin); "Duerme bien, pequeno oso [Sleep well, Little Bear]" (Quint Buchholz); "El mas bonito de todos los regales del mundo [The Most Beautiful Gift in the World]…

Schon, Isabel

2001-01-01

172

Los Alamos free electron laser: accelerator performance  

SciTech Connect

The Los Alamos free electron (FEL) laser oscillator has successfully operated over a wavelength range from 9 to 11 ..mu..m with a peak output power of 5 MW and an average output power of 6 kW over a 70-..mu..s pulse length. The FEL is driven by a conventional rf linear accelerator operating at 1.3 GHz with a nominal energy of 20 MeV. Particularly important parts of the beamline are the electron gun, the subharmonic and fundamental-bunching systems, the accelerator, the feedback controllers, the steering and focusing systems, the Cherenkov radiators used as beam-position monitors, and the slow and fast deflectors used with the diagnostic spectrometer at the exit of the beamline. We will discuss problems and present the performance of these components. 10 references, 12 figures, 2 tables.

Warren, R.W.; Stein, W.E.; Lynch, M.T.; Sheffield, R.L.; Fraser, J.S.

1984-01-01

173

Performance of the Los Alamos expanding telescope  

SciTech Connect

An expanding telescope can produce a very low divergence particle beam, provided that the beam optics have sufficient quality in order not to introduce large aberrations. Even as late as two years ago there were no theoretical beamline codes, and little experimental work that could describe the third-order aberrations introduced by an expanding telescope. A project was undertaken at Los Alamos National Laboratory to perform these calculations, and to build a telescope to confirm the predictions. It was installed at Argonne National Laboratory during the summer of 1987 and tested in a 50 MeV H/sup /-// beam. The telescope consisted of a singlet eyepiece and triplet objective lens with a twenty times magnification. It performed to the design specifications of twenty-five micro-radians beam divergence with a parallel beam focus. The measured geometric aberrations were found to be in agreement with the computer calculations.

Dombeck, T.W.

1988-01-01

174

LAPTAG: Los Angeles Physics Teachers Alliance Group  

NSDL National Science Digital Library

This is the home page of LAPTAG, the Los Angeles Physics Teachers Alliance Group, which constructed the first high school plasma lab in the United States. Plasma, considered to be the fourth state of matter, is a highly ionized substance containing equal amounts of positive and negative charge. By mass and volume, it is the most plentiful phase of matter in the universe. The LAPTAG plasma laboratory, funded in part by the DOE, consists of a small ionizing device powered by a helicon source with Langmuir probes used to measure density and electron temperature. The "Proposals & Manuals" link has the complete, cost-free lab manual on plasma physics for high school students. "Lectures & Notes on Plasma Physics" offers detailed notes and guidance in explaining the processes that occur when charged particles become a plasma.

Baker, Robert; Gekelman, Walter; Layton, Bill; Buck, Richard; Wise, Joe

2007-09-16

175

Information about Practicums at Los Alamos  

SciTech Connect

The Los Alamos Neutron Science Center is the premier facility for neutron science experiments ranging from cross section measurements, neutron scattering experiments, proton radiography, cold neutrons, actinide neutronic properties, and many other exciting topics. The National High Magnetic Field Laboratory is home to several powerful magnets, including the one that created the first non-destructive 100 Tesla field in March 2012. They probe the electronic structure of superconductors, magnetic properties of materials (including magneto-quantum effects). Research is also conducted in correlated materials, thermoacoustics, and magnetic properties of actinides. The Trident Laser has a unique niche with very high power, short pulse experiments, with a peak power of 10{sup 20} W in short pulse mode. Discoveries range from production of monoenergetic MeV ion beam, nonlinear kinetic plasma waves, the transition between kinetic and fluid nonlinear behavior and other laser-plasma interaction processes.

Bradley, Paul A. [Los Alamos National Laboratory

2012-07-24

176

Los Alamos Plutonium Facility Waste Management System  

SciTech Connect

This paper describes the new computer-based transuranic (TRU) Waste Management System (WMS) being implemented at the Plutonium Facility at Los Alamos National Laboratory (LANL). The Waste Management System is a distributed computer processing system stored in a Sybase database and accessed by a graphical user interface (GUI) written in Omnis7. It resides on the local area network at the Plutonium Facility and is accessible by authorized TRU waste originators, count room personnel, radiation protection technicians (RPTs), quality assurance personnel, and waste management personnel for data input and verification. Future goals include bringing outside groups like the LANL Waste Management Facility on-line to participate in this streamlined system. The WMS is changing the TRU paper trail into a computer trail, saving time and eliminating errors and inconsistencies in the process.

Smith, K.; Montoya, A.; Wieneke, R.; Wulff, D.; Smith, C.; Gruetzmacher, K.

1997-02-01

177

The Los Alamos Intense Neutron Source  

SciTech Connect

The Intense Neutron Source (INS) is an Inertial Electrostatic Confinement (IEC) fusion device presently under construction at Los Alamos National Laboratory. It is designed to produce 10{sup 11} neutrons per second steady-state using D-T fuel. Phase 1 operation of this device will be as a standard three grid IEC ion focus device. Expected performance has been predicted by scaling from a previous IEC device. Phase 2 operation of this device will utilize a new operating scheme, the Periodically Oscillating Plasma Sphere (POPS). This scheme is related to both the Spherical Reflect Diode and the Oscillating Penning Trap. With this type of operation the authors hope to improve plasma neutron production to about 10{sup 13} neutrons/second.

Nebel, R.A.; Barnes, D.C.; Bollman, R.; Eden, G.; Morrison, L.; Pickrell, M.M.; Reass, W.

1997-10-01

178

Hot Dry Rock Overview at Los Alamos  

SciTech Connect

The Hot Dry Rock (HDR) geothermal energy program is a renewable energy program that can contribute significantly to the nation's balanced and diversified energy mix. Having extracted energy from the first Fenton Hill HDR reservoir for about 400 days, and from the second reservoir for 30 days in a preliminary test, Los Alamos is focusing on the Long Term Flow Test and reservoir studies. Current budget limitations have slowed preparations thus delaying the start date of that test. The test is planned to gather data for more definitive reservoir modeling with energy availability or reservoir lifetime of primary interest. Other salient information will address geochemistry and tracer studies, microseismic response, water requirements and flow impedance which relates directly to pumping power requirements. During this year of ''preparation'' we have made progress in modeling studies, in chemically reactive tracer techniques, in improvements in acoustic or microseismic event analysis.

Berger, Michael; Hendron, Robert H.

1989-03-21

179

Los Alamos controlled-air incineration studies  

SciTech Connect

Current regulations of the Environmental Protection Agency (EPA) require that PCBs in concentrations greater than 500 ppM be disposed of in EPA-permitted incinerators. Four commercial incineration systems in the United States have EPA operating permits for receiving and disposing of concentrated PCBs, but none can accept PCBs contaminated with nuclear materials. The first section of this report presents an overview of an EPA-sponsored program for studying PCB destruction in the large-scale Los Alamos controlled-air incinerator. A second major FY 1983 program, sponsored by the Naval Weapons Support Center, Crane, Indiana, is designed to determine operating conditions that will destroy marker smoke compounds without also forming polycyclic aromatic hydrocarbons (PAHs), some of which are known or suspected to be carcinogenic. We discuss the results of preliminary trial burns in which various equipment and feed formulations were tested. We present qualitative analyses for PAHs in the incinerator offgas as a result of these tests.

Koenig, R.A.; Warner, C.L.

1983-01-01

180

Environmental surveillance at Los Alamos during 1989  

SciTech Connect

This report describes the environmental surveillance program conducted by Los Alamos National Laboratory during 1989. Routine monitoring for radiation and radioactive or chemical materials is conducted on the Laboratory site as well as in the surrounding region. Monitoring results are used to determine compliance with appropriate standards and to permit early identification of potentially undesirable trends. Results and interpretation of data for 1989 cover external penetrating radiation; quantities of airborne emissions and effluents; concentrations of chemicals and radionuclides in ambient air, surface and ground waters, municipal water supply, soils and sediments, and foodstuffs; and environmental compliance. Comparisons with appropriate standards, regulations, and background levels provide the basis for concluding that environmental effects from Laboratory operations are small and do not pose a threat to the public, Laboratory employees, or the environment. 58 refs., 31 figs., 39 tabs.

Not Available

1990-12-01

181

Prediction and synthesis efforts at Los Alamos  

SciTech Connect

One important aspect of an organic synthesis effort related to the development of new explosives, is the ability to estimate the properties of proposed molecules. In most cases, the detonation velocity and C-J pressure are estimated for the proposed explosive using any number of existing predictive methods. Novel explosives are being proposed, at Los Alamos and elsewhere, that are qualitatively different in their molecular makeup than most of the existing conventional ones. These explosives include, highly strained cage molecules, heterocyclic molecules, low hydrogen-containing molecules, and high nitrogen-containing molecules. This paper describes alternate ways of viewing detonation velocities and a new method for estimating detonation velocity of a proposed compound. 10 refs., 2 figs., 4 tabs.

Stine, J.R.; Coburn, M.D.

1988-01-01

182

Security Lapses Continue at Los Alamos  

NSDL National Science Digital Library

Despite Energy Secretary Bill Richardson's previous assertions that security at the Los Alamos National Laboratory had been improved, the Laboratory revealed on June 12 that two hard drives which contain "encyclopedic" amounts of information about Russian and Chinese nuclear weapon design, as well as weapons of American allies, had been missing since May 7, the day before the lab was evacuated because of the wildfire. The Lab Director and Energy Department officials, however, were not informed until May 31. Despite the sensitivity of the information on the drives, they were not classified at the highest level, and the vault where they were stored is accessible to apparently dozens of employees, none of whom are required to log in or log out. Without these records, there is no way of knowing whether the drives went missing the day the loss was discovered or at some point in the previous weeks. Richardson, who failed to appear at a Senate Intelligence Committee hearing on Wednesday, has placed six laboratory managers, including the head of the nuclear weapons programs, on paid leave. He also asked two highly respected former members of Congress, Howard Baker and Lee Hamilton, to conduct an independent investigation and recommend security improvements. In a related development, the Senate voted 97-0 to confirm Air Force Gen. John Gordon, the deputy director of the CIA, to take on a new post of security czar at the Department of Energy. In the meantime, the investigation continues at Los Alamos, where FBI agents plan to give polygraph tests to scientists who had access to the vault.

De Nie, Michael W.

183

MEDICIÓN DE HABILIDADES DIRECTIVAS EN LOS INSTITUTOS TECNOLÓGICOS DEL SURESTE DE MÉXICO. AVANCE DE INVESTIGACIÓN  

Microsoft Academic Search

Se presentan los avances de la investigacion doctoral con los resultados del estudio piloto. En la primera fase se obtuvo la opinion de un grupo de expertos de las habilidades que requieren tener los jefes de deprtamento, los subdirectores y directores para desempeñarse en su funcion. En una segunda fase se toma una muestra representativa de los directivos de los

Gloria Pérez Garmendia; Francisco Gerardo Barroso Tanoira; José Juan Escalante Fernández; Hortensia Eliseo Dantes

2008-01-01

184

Decommissioning the Los Alamos Molten Plutonium Reactor Experiment (LAMPRE I)  

SciTech Connect

The Los Alamos Molten Plutonium Reactor Experiment (LAMPRE I) was decommissioned at the Los Alamos National Laboratory, Los Alamos, New Mexico, in 1980. The LAMPRE I was a sodium-cooled reactor built to develop plutonium fuels for fast breeder applications. It was retired in the mid-1960s. This report describes the decommissioning procedures, the health physics programs, the waste management, and the costs for the operation.

Harper, J.R.; Garde, R.

1981-11-01

185

Natural History Museum of Los Angeles  

NSDL National Science Digital Library

The mission of the Natural History Museum of Los Angeles is to inspire wonder, discovery, and responsibility for our natural and cultural worlds. The Museum has three floors of exhibits, featuring the worldâs largest collection of natural gold in the Hall of Gems and Minerals, a dueling T. rex and Triceratops in the Dinosaur Hall, an insect zoo, Discovery Center hands-on activity world, as well as an exhibit featuring the worldâs rarest sharks. Programs include Winter Adventures in Nature offering children Pre-K through grade 8 the opportunity to explore a wide variety of museum topics about Earth's features, creatures and cultures from around the globe. There are classes available for children Pre-K through eighth grade on a wide variety of topics, and a Critter Club for ages three through five. There are group overnight adventures, and Family Fun Days featuring a special theme, from Dinosaurs to Dogs to Spooky Stuff. Interplay is the Museumâs web-based forum that brings the museum experience to life by providing a space for the exchange of ideas, inviting teachers, artists, thinkers, and the community to participate and contribute their thoughts and impressions of special exhibits.

186

Los Alamos upgrade in metallographic capabilities  

SciTech Connect

The Los Alamos Wing 9 Hot Cell Facility is in the process of upgrading their metallographic sample preparation and examination capability. The present capability to grind, polish and etch samples from reactor fuels and materials has been in operation for 18 years. Macro photography and alpha and beta-gamma autoradiography are an important part of this capability. Some of the fast breeder reactor experiments have contained sodium as a coolant. Therefore, the capability to distill sodium from some samples scheduled for microstructural examinations is a requirement. Since the reactor fuel samples are highly radioactive and contain plutonium, either as fabricated or as a result of breeding during reactor service, these samples must be handled in shielded hot cells containing alpha boxes to isolate the plutonium and hazardous fission products from personnel and the environment. The present equipment that was designed and built into those alpha boxes has functioned very well for the past 18 years. During that time the technicians have thought of ways to improve the equipment to do the work faster and safer. These ideas and ideas that have been developed during the design of new alpha boxes and new equipment for microstructural sample preparation have provided the concepts for the capability to perform the work faster and maintain the equipment in a safer manner.

Ledbetter, J.M.; Dowler, K.E.; Cook, J.H.

1985-01-01

187

Historic Manhattan Project Sites at Los Alamos  

ScienceCinema

The Manhattan Project laboratory constructed at Los Alamos, New Mexico, beginning in 1943, was intended from the start to be temporary and to go up with amazing speed. Because most of those WWII-era facilities were built with minimal materials and so quickly, much of the original infrastructure was torn down in the late '40s and early '50s and replaced by more permanent facilities. However, a few key facilities remained, and are being preserved and maintained for historic significance. Four such sites are visited briefly in this video, taking viewers to V-Site, the buildings where the first nuclear explosive device was pre-assembled in preparation for the Trinity Test in Southern New Mexico. Included is another WWII area, Gun Site. So named because it was the area where scientists and engineers tested the so-called "gun method" of assembling nuclear materials -- the fundamental design of the Little Boy weapon that was eventually dropped on Hiroshima. The video also goes to Pajarito Site, home of the "Slotin Building" and "Pond Cabin." The Slotin Building is the place where scientist Louis Slotin conducted a criticality experiment that went awry in early 1946, leading to his unfortunate death, and the Pond Cabin served the team of eminent scientist Emilio Segre who did early chemistry work on plutonium that ultimately led to the Fat Man weapon.

McGehee, Ellen

2014-05-22

188

Transportation Program: Los Alamos National Laboratory  

NSDL National Science Digital Library

The Los Alamos National Laboratory's (LANL) has applied some of its weapons development technologies to more peaceful uses in the realm of transportation. To this end, the Transportation Program is concerned with the development of innovative transportation systems. A Fuel Cells and Alternative Fuels section highlights the development of alternative fuels for use in fuel cells. A number of documents concerned with fuel cell systems research, as well as an online fuel cell tutorial, are available here. A Materials and Manufacturing section and a Concrete Center offer documents on the application of material science to transportation systems. Also, a Modeling and Simulation section contains reports on the development of modeling and simulation tools for studying the behavior of materials when poured into a mold, the way fuel ignites in an automobile engine chamber, and crash test simulations. Though this site emphasizes industrial applications, it offers a great deal of documentation of potential interest to academic engineers and others involved in urban planning and transportation systems.

1998-01-01

189

The Los Alamos Critical Experiments Facility Program  

SciTech Connect

Critical assemblies of precisely known materials and reproducible and easily calculated geometries have been constructed at the Los Alamos National Laboratory since the 1940s. Initially, these assemblies were built to provide information necessary for the nuclear weapons development effort. Subsequently, intensive studies of the assemblies themselves were undertaken to provide a better understanding of the physics of the fission process and other nuclear reactions in the nuclear materials from which these machine were constructed and in other materials irradiated in these assemblies. Some of these assemblies (notably Jezebel, Flattop, Big Ten, and Godiva) have been used as benchmark assemblies to compare the results of experimental measurements and computations of certain nuclear reaction parameters. These comparisons are used to validate both the input nuclear data and the computational methods. In addition to these normally fueled benchmark assemblies, other assembly machines are fueled periodically to provide specific and detailed results for parameter sensitivity studies for a large number of applications. Some of these machines and their applications are described.

Dowdy, E.J.

1987-01-01

190

High-Energy Particle Monte-Carlo at Los Alamos  

Microsoft Academic Search

A major computational effort at Los Alamos has been the development of a code system based on the HETC code for the transport of nucleons, pions, and muons. The Los Alamos National Laboratory version of HETC utilizes MCNP geometry and interfaces with MCNP for the transport of neutrons below 20 MeV and photons at any energy. A major recent effort

R. E. Prael

1985-01-01

191

Analysis of Los Angeles Photochemical Smog Data: A Statistical Overview  

Microsoft Academic Search

A research project has been under way to investigate air pollution problems in Los Angeles County with the help of the data supplied by the Los Angeles County Air Pollution Control District. These data consist of measurements of primary pollutants such as nitric oxide, hydrocarbons, carbon monoxide, sulfur dioxide and particu-lates, and secondary pollutants such as ozone and nitrogen dioxide,

G. C. Tiao; G. E. P. Box; W. J. Hamming

1975-01-01

192

EFICACIA EN LAS REUNIONES DE ACADEMIAS DE LOS INSTITUTOS TECNOLÓGICOS  

Microsoft Academic Search

La importancia que tienen los grupos de trabajo académicos para alcanzar objetivos que propicien la realización de investigación y desarrollo tecnológico en el Sistema Nacional de Institutos Tecnológicos hace imperativo su buen funcionamiento; de esto depende el poder alcanzar los objetivos o desviarse hacia actividades triviales. En ocasiones se realizan juntas pero no son productivas, con planeación defectuosa de las

Gloria Pérez Garmendia; Francisco Gerardo Barroso Tanoira; Concepción Mánica Zuccolotto

2007-01-01

193

Los Angeles Trade-Technical College Assessment Report.  

ERIC Educational Resources Information Center

This assessment report concerns the Los Angeles Trade-Technical College and the information, which is reported to the Los Angeles Community College District. The data was gathered through interviews conducted by an outside company. The report summarizes what interviewers learned about Trade-Tech's past and present and offers recommendations to…

Los Angeles Trade-Technical Coll., CA.

194

Roberto Gutierrez and the Art of Mapping Latino Los Angeles  

ERIC Educational Resources Information Center

Chicano artist Roberto Gutierrez is one of the most important artists to come out of the East Los Angeles artistic boom of the early 1970s. Gutierrez's life and the significance of his work to the evolving Chicano artistic narrative about Latino life and aesthetics in Los Angeles are discussed.

Orozco, Jose

2004-01-01

195

Estabilidad de los modelos de Heggie y Ramamani  

NASA Astrophysics Data System (ADS)

Los modelos de Heggie y Ramamani de satélites galácticos en órbitas circulares se basan en una teoría aproximada, por lo que es importante verificar su estabilidad mediante simulaciones numéricas. En esta forma, hemos logrado mostrar que son estables sobre intervalos de tiempo mucho mayores que los que lograron los propios autores de los modelos. Por otra parte, dado que hemos mostrado que el caos es significativo en estos modelos, son un sistema ideal para investigar si, pese a ello, se mantienen estacionarios. Nuestras simulaciones numéricas muestran que, pese al caos, la estacionariedad se mantiene sobre intervalos de centenares de tiempos de cruce del sistema, mucho mayores que los tiempos de Liapunov característicos de sus movimientos caóticos.

Muzzio, J. C.; Vergne, M. M.; Wachlin, F. C.; Carpintero, D. D.

196

Factor V assay  

MedlinePLUS

The factor V assay is a blood test to measure the activity of factor V. This is a substances involved in blood clotting ( ... Decreased factor V activity may be related to: Deficiency of factor ... at birth (congenital) Disseminated intravascular coagulation ( ...

197

Factor V deficiency  

MedlinePLUS

Factor V deficiency is a condition that is passed down through families, which affects the ability of the blood ... These proteins are called blood coagulation factors. Factor V deficiency is caused by a lack of Factor ...

198

Activation of Toll-Like Receptor 2 (TLR2) and TLR4/MD2 by Neisseria Is Independent of Capsule and Lipooligosaccharide (LOS) Sialylation but Varies Widely among LOS from Different Strains  

PubMed Central

Lipooligosaccharide (LOS) structure and capsular polysaccharide of Neisseria meningitidis each greatly influence the virulence of the organism and the quality of host innate immune responses. In this study, we found that production of the proinflammatory cytokine tumor necrosis factor (TNF) by a human monocyte-derived cell line (THP-1) exposed to strains of N. meningitidis lacking capsule and/or with truncated LOS was similar to that elicited by the isogenic wild-type strain. These mutants also exhibited no difference in induction of the interleukin-8 (IL-8) promoter in a transfected HeLa cell system of Toll-like receptor 2 (TLR2) and TLR4/MD2 signaling. However, purified LOS from diverse strains of Neisseria (both N. meningitidis and N. gonorrhoeae) caused widely variant levels of IL-8 promoter induction in cells expressing MD2 that correlated with the production of TNF from THP-1 cells. These data suggest that although modification of the oligosaccharide chain of LOS and/or absence of capsule do not affect cell signaling mediated by TLR4/MD2, fine-structural differences in the LOS do influence signaling through TLR4/MD2 and, through this pathway, influence some of the proinflammatory responses elicited by Neisseria.

Pridmore, Alison C.; Jarvis, Gary A.; John, Constance M.; Jack, Dominic L.; Dower, Steven K.; Read, Robert C.

2003-01-01

199

3D View of Los Angeles  

NASA Technical Reports Server (NTRS)

California's topography poses challenges for road builders. Northwest of Los Angeles, deformation of Earth's crust along the Pacific-North American crustal plate boundary has made transportation difficult. Direct connection between metropolitan Los Angeles (image lower left) and California's Central Valley (image top center) through the rugged terrain seen on the left side of this image was long avoided in favor of longer but easier paths. However, over the last century, three generations of roads have traversed this terrain. The first was 'The Ridge Route', a two-lane road, built in 1915, which followed long winding ridge lines that included 697 curves. The second, built in 1933, was to become four-lane U.S. Highway 99. It generally followed widened canyon bottoms. The third is the current eight lane Interstate 5 freeway, built in the 1960s, which is generally notched into hillsides, but also includes a stretch of several miles where the two directions of travel are widely separated and driving is 'on the left', a rarity in the United States. Such an unusual highway configuration was necessary in order to optimize the road grades for uphill and downhill traffic in this topographically challenging setting. This anaglyph was generated by first draping a Landsat satellite image over a preliminary topographic map from the Shuttle Radar Topography Mission (SRTM), then generating two differing perspectives, one for each eye. When viewed through special glasses, the result is a vertically exaggerated view of the Earth's surface in its full three dimensions. Anaglyph glasses cover the left eye with a red filter and cover the right eye with a blue filter. Landsat has been providing visible and infrared views of the Earth since 1972. SRTM elevation data matches the 30 meter resolution of most Landsat images and will substantially help in analyses of the large and growing Landsat image archive. The elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on February 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect three-dimensional measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter-long (200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between the National Aeronautics and Space Administration (NASA), the National Imagery and Mapping Agency (NIMA) of the U.S. Department of Defense (DoD), and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Earth Science Enterprise, Washington, DC. Size (of full images): 141 by 107 kilometers (88 by 66 miles) Location: 34.5 deg. North lat., 118.7 deg. West lon. Orientation: North toward upper right Image: Landsat bands 1, 2and4, 3 as blue, green, and red, respectively Date Acquired: February 16, 2000 (SRTM), November 11, 1986 (Landsat) Image courtesy NASA/JPL/NIMA

2002-01-01

200

Alpha factor analysis  

Microsoft Academic Search

A distinction is made between statistical inference and psychometric inference in factor analysis. After reviewing Rao's canonical factor analysis (CFA), a fundamental statistical method of factoring, a new method of factor analysis based upon the psychometric concept of generalizability is described. This new procedure (alpha factor analysis, AFA) determines factors which have maximum generalizability in the Kuder-Richardson, or alpha, sense.

Henry F. Kaiser; John Caffrey

1965-01-01

201

Waste characterization at Los Alamos National Laboratory  

SciTech Connect

Most industries generate limited types of solid wastes of a result of their manufacturing processes. The Los Alamos National Laboratory (LANL), a research and development facility, generates a large variety of solid wastes, some exotic. Over 50,000 distinct waste streams are currently generated in the 43 square mile area defining LANL. These wastes include refuse, medical, infectious, hazardous, radioactive, and mixed wastes. LANL is subject to federal and State oversight on matters concerning management of solid wastes. In order to assure regulatory agencies such as the New Mexico Environment Department (NMED) and the US Environmental Protection Agency (EPA) that the Laboratory is properly managing and disposing all solid wastes. LANL has undertaken an extensive waste characterization program to identify sources and ultimate disposition of all solid wastes. Given the number of solid waste streams expected, LANL has taken a two-pronged approach to characterizing wastes: (a) physical identification of all sources of solid wastes including interviews with waste generators; and (b) characterization of wastes from the point of generation. The former approach consists of canvassing all structures within the LANL complex, interviewing waste generators, and identifying sources of waste generation. Data gathered by these interviews are compiled in a database in order to identify the types and rates of waste generation and correct mismanagement of wastes identified during the interviews. The latter approach consists of characterizing all solid wastes which are controlled administratively or subject to stricter controls than municipal solid wastes (i.e., infectious, hazardous, radioactive, and mixed wastes). This characterization forms the basis by which LANL will manage solid waste in accordance to NMED/EPA regulations and US Department of Energy Orders. 8 refs., 3 figs.

Corpion, J.C.; Grieggs, A.R.

1991-01-01

202

Methane Hotspots in the Los Angeles Megacity  

NASA Astrophysics Data System (ADS)

Airborne observations show that Los Angeles (LA) is a large source of methane to the atmosphere, yet the sources of excess methane from the urban area are poorly constrained. We used a mobile laboratory, a Ford Transit van equipped with cavity ring down spectrometers (Picarro, Inc.), to measure greenhouse gases (CH4, CO2, and CO) mole fractions in LA. On-road surveys across the LA Basin were conducted seasonally to determine patterns of CH4 enrichment in space and over time, with a focus on quantifying methane leaks from known sources. We found fugitive leaks and elevated CH4 concentrations throughout the LA Basin. Some were associated with known sources, such as landfills, wastewater treatment, and oil and gas infrastructure, while others had an unknown origin. Urban CH4 enrichment varied over the course of the year, largely due to seasonal changes in meteorological conditions. Nevertheless, our mobile surveys revealed CH4 hotspots (>200 ppb elevated with respect to background levels) that persisted among seasons. High CH4 concentrations were most easily predicted by proximity to methane sources, particularly near the coast, while elevated CH4 levels were more evenly dispersed in inland areas. CH4 hotspots had a disproportionate impact on excess methane relative to the area they accounted for, typically providing more than a quarter of excess methane measured on a transect. These data improve estimates of the relative roles of specific leaks and emission sectors to LA's excess methane. Depending on the cost of reducing these CH4 leaks, a focus on CH4 emissions may prove an effective way to reduce LA's greenhouse gas emissions in the near term.

Hopkins, F. M.; Randerson, J. T.; Bush, S.; Ehleringer, J. R.; Lai, C.; Kort, E. A.; Blake, D. R.

2013-12-01

203

Associations between ethnic labels and substance use among hispanic/latino adolescents in los angeles.  

PubMed

Self-identification with ethnic-specific labels may indicate successful ethnic identity formation, which could protect against substance use. Alternatively, it might indicate affiliation with oppositional subcultures, a potential risk factor. This study examined longitudinal associations between ethnic labels and substance use among 1,575 Hispanic adolescents in Los Angeles. Adolescents who identified as Cholo or La Raza in 9th grade were at increased risk of past-month substance use in 11th grade. Associations were similar across gender and were not confounded by socioeconomic status, ethnic identity development, acculturation, or language use. Targeted prevention interventions for adolescents who identify with these subcultures may be warranted. PMID:24779500

Unger, Jennifer B; Thing, James; Soto, Daniel Wood; Baezconde-Garbanati, Lourdes

2014-07-01

204

Associations Between Ethnic Labels and Substance Use Among Hispanic/Latino Adolescents in Los Angeles  

PubMed Central

Self-identification with ethnic-specific labels may indicate successful ethnic identity formation, which could protect against substance use. Alternatively, it might indicate affiliation with oppositional subcultures, a potential risk factor. This study examined longitudinal associations between ethnic labels and substance use among 1,575 Hispanic adolescents in Los Angeles. Adolescents who identified as Cholo or La Raza in 9th grade were at increased risk of past-month substance use in 11th grade. Associations were similar across gender and were not confounded by socioeconomic status, ethnic identity development, acculturation, or language use. Targeted prevention interventions for adolescents who identify with these subcultures may be warranted.

Unger, Jennifer B; Thing, James; Soto, Daniel Wood; Baezconde-Garbanati, Lourdes

2014-01-01

205

Propuesta de un m‚todo para la elecci¢n de buenas alternativas para la localizaci¢n de empresas de reciclaje de RAEE en Espa¤a  

Microsoft Academic Search

Ante la necesidad de Espa¤a de instalar nuevas empresas de reciclaje de RAEE, este trabajo proporciona a los agentes decisores una ordenaci¢n de los principales municipios espa¤oles seg£n su apropiabilidad para la instalaci¢n de estas empresas. Desarrolla un procedimiento que consiste en la identificaci¢n de los factores relevantes que deben tenerse en cuenta y en la posterior aplicaci¢n de una

Dolores Queiruga; Javier Gonz lez Benito; Grit Walther; Thomas Spengler

2004-01-01

206

EVALUACIÓN DE LA SOSTENIBILIDAD EN LOS CULTIVOS DE PALMA AFRICANA EN EL DEPARTAMENTO DEL META  

Microsoft Academic Search

Al cultivo de la palma de aceite se le acusa por los problemas inherentes a los monocultivos y porque a éste en particular se le asocia con violaciones de los derechos humanos. Adicionalmente, en las plantaciones se usan formas de contratación que descargan sobre los trabajadores parte de los costos de la competitividad que exige el comercio internacional. Sin embargo,

Juan Manuel Ochoa Amaya; Ernesto Leonel Chávez Hernández

2011-01-01

207

77 FR 3257 - Transfer of Land Tracts Located at Los Alamos National Laboratory, New Mexico  

Federal Register 2010, 2011, 2012, 2013

...Located at Los Alamos National Laboratory, New Mexico AGENCY: National...Located at Los Alamos National Laboratory, Los Alamos and Santa Fe...acreage of Los Alamos National Laboratory's (LANL's) Technical...Site Office, 3747 West Jemez Road, Los Alamos, NM...

2012-01-23

208

Coordinación de los sistemas de gestión de calidad, medio ambiente y salud laboral  

Microsoft Academic Search

La aparición sucesiva de los tres sistemas de gestión mencionados en el título, junto con los diferentes ámbitos de aplicación de los mismos, ha llevado a que las empresas los hayan puesto en marcha de manera independiente. A pesar de las numerosas similitudes entre los objetivos y procedimientos contemplados en dichos sistemas, por razones históricas y, en muchos casos, por

Miguel A. Rodriguez; Joan E. Ricart

2000-01-01

209

Smog chamber simulation of Los Angeles pollutant transport  

SciTech Connect

A smog chamber study simulated pollutant transport from Los Angeles to downwind areas by irradiating a typical Los Angeles hydrocarbon/nitrogen oxides mixture for extended periods of time. Smog chamber experiments were extended to 22 hr to obtain an integrated light intensity equal to that which occurs in this city. Results show that downwind oxidant levels are only slightly affected by large changes in emissions of nitrogen oxides. However, it is clear that reduced emissions will lead to an increase in oxidant in downtown Los Angeles. (6 graphs, 9 references, 1 table)

Glasson, W.A.

1981-06-01

210

Factor Xa inhibitors  

Microsoft Academic Search

Summary Factor Xa is the serine protease that activates prothrombin to yield thrombin. Inhibitors of factor Xa play a crucial role in curtailing thrombin generation. Two key factor Xa inhibitors that are found in blood are antithrombin III and tissue factor pathway inhibitor. Inhibition of factor Xa is a mechanism that is also exploited by certain hematophagous animals to facilitate

Shi-Shan Mao

1994-01-01

211

Predictors of Unrecognized HIV Infection Among Poor and Ethnic Men Who Have Sex with Men in Los Angeles  

Microsoft Academic Search

This study evaluates associations between unrecognized HIV infection and demographic factors, internalized homonegativity,\\u000a drug use, and sexual behaviors among HIV positive men who have sex with men (MSM). We analyzed data from 347 HIV positive\\u000a participants from the Los Angeles site for NIDA’s Sexual Acquisition and Transmission of HIV-Cooperative Agreement Program.\\u000a Participants were HIV positive MSM and MSM\\/W and predominantly

Sean D. Young; Steven Shoptaw; Robert E. Weiss; Brett Munjas; Pamina M. Gorbach

2011-01-01

212

South Central Los Angeles: A Community in Transition.  

ERIC Educational Resources Information Center

Discusses how Los Angeles Southwest College perhaps best illustrates the rising tide of Latinos and other minorities sweeping into higher education institutions of deeply steeped Black heritage, and the challenges and new growing pains such schools face. (EV)

Lum, Lydia

2001-01-01

213

Los ojos de la NASA sobre la Tierra  

NASA Video Gallery

La NASA cuenta con más de una decena de satélites que estudian la Tierra. Conoce la información que recaban los satélites, junto con Gilberto Colón, asistente especial del subdirector del Centro de...

214

Explosive Flux Compression: 50 Years of Los Alamos Activities  

SciTech Connect

Los Alamos flux compression activities are surveyed, mainly through references in view of space limitations. However, two plasma physics programs done with Sandia National Laboratory are discussed in more detail.

Fowler, C.M.; Thomson, D.B.; Garn, W.B.

1998-10-18

215

Status of the Los Alamos proton storage ring  

SciTech Connect

The Proton Storage Ring for the Weapons Neutron Research Facility of the Los Alamos National Laboratory is reviewed as a construction project. The current status of construction and design is outlined.

Cooper, R.K.; Spalek, G.

1981-01-01

216

Instantánea de los cánceres de cabeza y cuello  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre los cánceres de cabeza y cuello; así como ejemplos de actividades del NCI y adelantos en la investigación de estos tipos de cáncer.

217

RF Superconductivity Research and Development at Los Alamos National Laboratory.  

National Technical Information Service (NTIS)

Los Alamos National Laboratory is engaged in two distinct areas of rf superconductivity research and development. One program is devoted to studying the rf properties of high-temperature superconductors (HTS) and assessing their potential for accelerator-...

D. W. Cooke E. R. Gray R. J. Houlton G. P. Lawrence J. A. McGill

1989-01-01

218

Fine Pore Diffuser Fouling: The Los Angeles Studies.  

National Technical Information Service (NTIS)

This report describes five fine pore diffuser evaluations conducted at three different wastewater treatment plants located in the greater Los Angeles area. The overall goal of the study was to evaluate the performance of fine pore diffusers using selected...

M. K. Stenstrom G. Masutani

1994-01-01

219

Benchmark Assemblies of the Los Alamos Critical Assemblies Facility.  

National Technical Information Service (NTIS)

Several critical assemblies of precisely known materials composition and easily calculated and reproducible geometries have been constructed at the Los Alamos National Laboratory. Some of these machines, notably Jezebel, Flattop, Big Ten, and Godiva, have...

E. J. Dowdy

1985-01-01

220

Investigative Case - Los Angeles and the Future of Mono Lake  

NSDL National Science Digital Library

The Los Angeles and the Future of Mono Lake WebQuest leads students in a guided exploration of Mono Lake's extreme environment and asks them to consider the preservation of this environment in relation to the needs of humans.

Developed by Monica Bruckner, Montana State University, based on the Los Angeles and the Future of Mono Lake WebQuest by Sarah Bordenstein, Marine Biological Laboratory.

221

ZERT Final Scientific Report Los Alamos National Laboratory.  

National Technical Information Service (NTIS)

Los Alamos National Laboratory's (LANL) activities for the Center for Zero Emission Research and Technology (ZERT) have fallen into three broad research areas: (1) How do you reduce uncertainty in assuring prior to operation that an engineered geologic si...

R. J. Pawar

2011-01-01

222

High-energy particle Monte Carlo at Los Alamos  

Microsoft Academic Search

A major computational effort at Los Alamos has been the development of a code system based on the HETC code for the transport\\u000a of nucleons, pions, and muons. The Los Alamos National Laboratory version of HETC utilizes MCNP geometry and interfaces with\\u000a MCNP for the transport of neutrons below 20 MeV and photons at any energy. A major recent effort

R. E. Prael

223

Strategic defense initiatives at Los Alamos National Laboratory  

SciTech Connect

This presentation reviews the Strategic Defense Initiative (SDI) programs at Los Alamos National Laboratory, noting especially the needs for and applications of optics and optical technologies. Table I lists the various activities at Los Alamos contributing to SDI programs. The principal, nonnuclear SDI programs are: (1) the free-electron laser, and (2) neutral particle beams. Both should be considered as potential long-range-kill systems, but still in the futuristic category.

Rockwood, S.D.

1985-01-01

224

1993 Northern goshawk inventory on portions of Los Alamos National Laboratory, Los Alamos, NM. Final report  

SciTech Connect

Northern goshawks (Accipiter gentilis) (hereafter referred to as goshawk) is a large forest dwelling hawk. Goshawks may be declining in population and reproduction in the southwestern United States. Reasons for the possible decline in goshawk populations include timber harvesting resulting in the loss of nesting habitat, toxic chemicals, and the effects of drought, fire, and disease. Thus, there is a need to determine their population status and assess impacts of management activities in potential goshawk habitat. Inventory for the goshawk was conducted on 2,254 ha of Los Alamos National Laboratory (LANL) to determine the presence of nesting goshawks on LANL lands. This information can be incorporated into LANL`s environmental management program. The inventory was conducted by Colorado State University personnel from May 12 to July 30, 1993. This report summarizes the results of this inventory.

Sinton, D.T.; Kennedy, P.L. [Colorado State Univ., Fort Collins, CO (United States). Dept. of Fishery and Wildlife Biology

1994-06-01

225

Photochemical aging of volatile organic compounds in the Los Angeles basin: Weekday-weekend effect  

NASA Astrophysics Data System (ADS)

During the CalNex (California Research at the Nexus of Air Quality and Climate Change) field study in May-June 2010, measurements of volatile organic compounds (VOCs) were performed in the Los Angeles (LA) basin onboard a NOAA research aircraft and at a ground site located in Pasadena. A weekday-weekend effect in ozone, caused by lower NOx emissions due to reduced diesel truck traffic in the weekends, has been previously observed in Los Angeles and other cities. Measurements in the Caldecott tunnel show that emission ratios of VOCs do not vary with the day of the week, but measurements during CalNex2010 show a VOC weekday-weekend effect through faster photochemical processing at lower ambient NOx mixing ratios. Ambient VOC enhancement ratios of long-lived species such as benzene are the same between weekdays and weekends, whereas enhancement ratios of short-lived species, such as trimethyl benzene, are up to a factor of three lower on weekends. Based upon the observed differences in VOC enhancement ratios to CO, we determine that photochemical processing was on average 65%-75% faster on weekends during CalNex2010, which indicates that ambient OH radical concentrations were larger by this factor causing the observed change in VOC composition. A box model calculation based on the Master Chemical Mechanism was used to verify the increase in photochemical processing in the weekends.

Warneke, Carsten; Gouw, Joost A.; Edwards, Peter M.; Holloway, John S.; Gilman, Jessica B.; Kuster, William C.; Graus, Martin; Atlas, Elliot; Blake, Don; Gentner, Drew R.; Goldstein, Allen H.; Harley, Robert A.; Alvarez, Sergio; Rappenglueck, Bernhard; Trainer, Michael; Parrish, David D.

2013-05-01

226

Healthcare Inspection. Oversight Review of Ophthalmology Adverse Drug Events: VA Greater Los Angeles Healthcare System Los Angeles, California.  

National Technical Information Service (NTIS)

The VA Office of Inspector General Office of Healthcare Inspections conducted an oversight review to assess actions taken by VA Greater Los Angeles Healthcare System (the facility) leadership in addressing intravitreal injections (treatment to deliver med...

2012-01-01

227

Factors Promoting Academic Success among African American and White Male Community College Students  

ERIC Educational Resources Information Center

This study seeks to isolate factors associated with academic success, operationalized as grade point average (GPA) and course completion, among two male student populations within the Los Angeles Community College District (LACCD): African American and white men. In order to determine the factors that are associated with academic success, two…

Perrakis, Athena I.

2008-01-01

228

TMD-factorization, Factorization Breaking and Evolution  

Microsoft Academic Search

We give an overview of the current status of perturbative QCD factorization theorems in processes that involve transverse momentum dependent (TMD) parton distribution functions (PDFs) and fragmentation functions (FF). We enumerate those cases where TMD-factorization is well-established, and mention cases where it is likely to fail. We discuss recent progress in the implementation of specific TMD-factorization calculations, including the implementation

S. M. Aybat; T. C. Rogers

2011-01-01

229

Homonegativity, Substance Use, Sexual Risk Behaviors, and HIV Status in Poor and Ethnic Men Who Have Sex with Men in Los Angeles  

Microsoft Academic Search

This study evaluates associations between internalized homonegativity and demographic factors, drug use behaviors, sexual\\u000a risk behaviors, and HIV status among men who have sex with men (MSM) and with men and women (MSM\\/W). Participants were recruited\\u000a in Los Angeles County using respondent-driven sampling (RDS) and completed the Internalized Homonegativity Inventory (IHNI)\\u000a and questionnaires on demographic and behavioral factors. Biological samples

Steven Shoptaw; Robert E. Weiss; Brett Munjas; Christopher Hucks-Ortiz; Sean D. Young; Sherry Larkins; Gregory D. Victorianne; Pamina M. Gorbach

2009-01-01

230

6.NS Factors and Common Factors  

NSDL National Science Digital Library

This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: List all the factors of 48. List all the factors of 64. What are the common factors of 48 and 64? What is the greatest common factor of 48 and 64?...

231

Background radioactivity in sediments near Los Alamos, New Mexico.  

PubMed

River and reservoir sediments have been collected annually by Los Alamos National Laboratory since 1974 and 1979, respectively. These background samples are collected from five river stations and four reservoirs located throughout northern New Mexico and southern Colorado. Analyses include 3H, 90Sr, 137Cs, total U, 238Pu, 239,240Pu, 241Am, gross alpha, gross beta, and gross gamma radioactivity. Surprisingly, there are no federal or state regulatory standards in the USA that specify how to compute background radioactivity values on sediments. Hence, the sample median (or 0.50 quantile) is proposed for this background because it reflects central data tendency and is distribution-free. Estimates for the upper limit of background radioactivity on river and reservoir sediments are made for sampled analytes using the 0.95 quantile (two-tail). These analyses also show that seven of ten analytes from reservoir sediments are normally distributed, or are normally distributed after a logarithmic or square root transformation. However, only three of ten analytes from river sediments are similarly distributed. In addition, isotope ratios for 137Cs/238Pu, 137Cs/239,240Pu, and 239,240Pu/238Pu from reservoir sediments are independent of clay content, total organic carbon/specific surface area (TOC/SSA) and cation exchange capacity/specific surface area (CEC/SSA) ratios. These TOC/SSA and CEC/SSA ratios reflect sediment organic carbon and surface charge densities that are associated with radionuclide absorption, adsorption, and ion exchange reactions on clay mineral structures. These latter ratio values greatly exceed the availability of background radionuclides in the environment, and insure that measured background levels are a maximum. Since finer-grained reservoir sediments contain larger clay-sized fractions compared to coarser river sediments, they show higher background levels for most analytes. Furthermore, radioactivity values on reservoir sediments have remained relatively constant since the early 1980s. These results suggest that clay contents in terrestrial sediments are often more important at concentrating background radionuclides than many other environmental factors, including geology, climate and vegetation. Hence, reservoirs and floodplains represent ideal radionuclide sampling locations because fine-grained materials are more easily trapped here. Ultimately, most of these differences still reflect spatial and temporal variability originating from global atmospheric nuclear weapons testing and disintegration of nuclear-powered satellites upon atmospheric reentry. PMID:15207580

McLin, Stephen G

2004-07-26

232

Efectos de los armónicos en los motores de inducción: una revisión  

Microsoft Academic Search

The behavior of induction machines varies when they are feed with sources having harmonics tension. This paper shows a view about the conditions operation and the effects of the harmonics tension, in the trifasical induction motors. Basically, will be checked: model, useful life, temperature, additional loses thermical old, power factor, efficiency, vibrations and noises, pulses torques and derated.

John Grajales; José Ramírez; Diego Cadavid

2004-01-01

233

Inter-community variability in total particle number concentrations in the eastern Los Angeles air basin  

NASA Astrophysics Data System (ADS)

Ultrafine Particles (UFP) can display sharp gradients in their number concentrations in urban environment due to their transient nature and rapid atmospheric processing. The ability of using air pollution data generated at a central monitoring station to assess exposure relies on our understanding of the spatial variability of a specific pollutant associated with a region. High spatial variation in the concentrations of air pollutants has been reported at scales of 10s of km for areas affected by primary emissions. Spatial variability in particle number concentrations (PNC) and size distributions needs to be investigated, as the representativeness of a monitoring station in a region is premised on the assumption of homogeneity in both of these metrics. This study was conducted at six sites, one in downtown Los Angeles and five located about 40-115 km downwind in the receptor areas of Los Angeles air basin. PNC and size distribution were measured using Condensation Particle Counters (CPC) and Scanning Mobility Particle Sizer (SMPS). The seasonal and diurnal variations of PNC implied that PNC might vary significantly with meteorological conditions, even though the general patterns at the sites may remain generally similar across the year due to consistency of sources around them. Regionally transported particulate matter (PM) from upwind urban areas of Los Angeles lowered spatial variation by acting as a "homogenizing" factor during favorable meteorological conditions. Spatial variability also increased during hours of the day during which the effects of local sources predominate. The spatial variability associated with PNC (quantified using Coefficients of Divergence, CODs), averaged about 0.3, which was generally lower than that based on specific size ranges. Results showed an inverse relationship of COD with particles size, with fairly uniform values in the particle range which is associated with regional transport. Our results suggest that spatial variability, even in the receptor regions of Los Angeles Basin, should be assessed for both PNC and size distributions, and should be interpreted in context of seasonal and diurnal influences, and suitably factored if values for exposure are ascertained using a central monitoring station.

Hudda, N.; Cheung, K.; Moore, K. F.; Sioutas, C.

2010-12-01

234

Inter-community variability in total particle number concentrations in the eastern Los Angeles air basin  

NASA Astrophysics Data System (ADS)

Ultrafine Particles (UFP) can display sharp gradients in their number concentrations in urban environment due to their transient nature and rapid atmospheric processing. The ability of using air pollution data generated at a central monitoring station to assess exposure relies on our understanding of the spatial variability of a specific pollutant associated with a region. High spatial variation in the concentrations of air pollutants has been reported at scales of 10s of km for areas affected by primary emissions. Spatial variability in particle number concentrations (PNC) and size distributions needs to be investigated, as the representativeness of a monitoring station in a region is premised on the assumption of homogeneity in both of these metrics. This study was conducted at seven sites, one in downtown Los Angeles and six located about 40-115 km downwind in the receptor areas of Los Angeles air basin. PNC and size distribution were measured using Condensation Particle Counters (CPC) and Scanning Mobility Particle Sizer (SMPS). The seasonal and diurnal variations of PNC implied that PNC might vary significantly with meteorological conditions, even though the general patterns at the sites may remain generally similar across the year due to consistency of sources around them. Regionally transported particulate matter (PM) from upwind urban areas of Los Angeles lowered spatial variation by acting as a "homogenizing" factor during favorable meteorological conditions. Spatial variability also increased during hours of the day during which the effects of local sources predominated. The spatial variability associated with PNC (quantified using Coefficients of Divergence, CODs), averaged 0.3, which was generally lower than that based on specific size ranges. Results showed an inverse relationship of COD with particles size, with fairly uniform values in the particle range above 40-50 nm, which is associated with regional transport. Our results suggest that spatial variability, even in the receptor regions of Los Angeles Basin, should be assessed for both PNC and size distributions, and should be interpreted in context of seasonal and diurnal influences, and suitably factored if values for exposure are ascertained using a central monitoring station.

Hudda, N.; Cheung, K.; Moore, K. F.; Sioutas, C.

2010-06-01

235

Environmental assessment for effluent reduction, Los Alamos National Laboratory, Los Alamos, New Mexico  

SciTech Connect

The Department of Energy (DOE) proposes to eliminate industrial effluent from 27 outfalls at Los Alamos National Laboratory (LANL). The Proposed Action includes both simple and extensive plumbing modifications, which would result in the elimination of industrial effluent being released to the environment through 27 outfalls. The industrial effluent currently going to about half of the 27 outfalls under consideration would be rerouted to LANL`s sanitary sewer system. Industrial effluent from other outfalls would be eliminated by replacing once-through cooling water systems with recirculation systems, or, in a few instances, operational changes would result in no generation of industrial effluent. After the industrial effluents have been discontinued, the affected outfalls would be removed from the NPDES Permit. The pipes from the source building or structure to the discharge point for the outfalls may be plugged, or excavated and removed. Other outfalls would remain intact and would continue to discharge stormwater. The No Action alternative, which would maintain the status quo for LANL`s outfalls, was also analyzed. An alternative in which industrial effluent would be treated at the source facilities was considered but dismissed from further analysis because it would not reasonably meet the DOE`s purpose for action, and its potential environmental effects were bounded by the analysis of the Proposed Action and the No Action alternatives.

NONE

1996-09-11

236

Los Alamos Scientific Laboratory energy-related history, research, managerial reorganization proposals, actions taken, and results. History report, 1945--1979  

SciTech Connect

This report documents the development of major energy-related programs at the Los Alamos Scientific Laboratory between 1945 and 1979. Although the Laboratory`s primary mission during that era was the design and development of nuclear weapons and most of the Laboratory`s funding came from a single source, a number of factors were at work that led to the development of these other programs. Some of those factors were affected by the Laboratory`s internal management structure and organization; others were the result of increasing environmental awareness within the general population and the political consequences of that awareness; still others were related to the increasing demand for energy and the increasing turmoil in the energy-rich Middle East. This report also describes the various activities in Los Alamos, in Washington, and in other areas of the world that contributed to the development of major energy-related programs at Los Alamos. The author has a unique historical perspective because of his involvement as a scientist and manager at the Los Alamos Scientific Laboratory during the time period described within the report. In addition, in numerous footnotes and references, he cites a large body of documents that include the opinions and perspectives of many others who were involved at one time or another in these programs. Finally the report includes a detailed chronology of geopolitical events that led to the development of energy-related programs at Los Alamos.

Hammel, E.F.

1997-03-01

237

Multibeam mapping of the Los Angeles, California Margin  

USGS Publications Warehouse

The Los Angeles, California Margin was mapped using multibeam echosounders during three separate surveys (Figure 1). In 1996, the USGS surveyed the shelf and slope in Santa Monica Bay from Pt. Dume to south of the Palos Verdes Peninsula. The mapping was accomplished using a Kongsberg Simrad EM1000 multibeam sonar system that provided high-quality bathymetry and quantitative backscatter. In 1998, the USGS continued the mapping to the south and surveyed the outer shelf, slope, and proximal basin off Long Beach and Newport using a Kongsberg Simrad EM300 multibeam sonar system. In 1999, the Los Angeles Margin mapping was completed with the surveying of the inner Long Beach shelf from the Palos Verdes Peninsula, south to Newport. This survey used a dual Kongsberg Simrad EM3000D multibeam sonar system. These three surveys were conducted to support USGS projects studying marine pollution and geohazards along the Los Angeles Margin.

Gardner, James V.; Dartnell, Peter

2002-01-01

238

Water Supply at Los Alamos 1998-2001  

SciTech Connect

For the period 1998 through 2001, the total water used at Los Alamos from all sources ranged from 1325 million gallons (Mg) in 1999 to 1515 Mg in 2000. Groundwater production ranged from 1323 Mg in 1999 to 1506 Mg in 2000 from the Guaje, Pajarito, and Otowi fields. Nonpotable surface water used from Los Alamos reservoir ranged from zero gallons in 2001 to 9.3 Mg in 2000. For years 1998 through 2001, over 99% of all water used at Los Alamos was groundwater. Water use by Los Alamos National Laboratory (LANL) between 1998 and 2001 ranged from 379 Mg in 2000 to 461 Mg in 1998. The LANL water use in 2001 was 393 Mg or 27% of the total water use at Los Alamos. Water use by Los Alamos County ranged from 872 Mg in 1999 to 1137 Mg in 2000, and averaged 1006 Mg/yr. Four new replacement wells in the Guaje field (G-2A, G-3A, G-4A, and G-5A) were drilled in 1998 and began production in 1999; with existing well G-1A, the Guaje field currently has five producing wells. Five of the old Guaje wells (G-1, G-2, G-4, G-5, and G-6) were plugged and abandoned in 1999, and one well (G-3) was abandoned but remains as an observation well for the Guaje field. The long-term water level observations in production and observation (test) wells at Los Alamos are consistent with the formation of a cone of depression in response to water production. The water level decline is gradual and at most has been about 0.7 to 2 ft per year for production wells and from 0.4 to 0.9 ft/yr for observation (test) wells. The largest water level declines have been in the Guaje field where nonpumping water levels were about 91 ft lower in 2001 than in 1951. The initial water levels of the Guaje replacement wells were 32 to 57 ft lower than the initial water levels of adjacent original Guaje wells. When production wells are taken off-line for pump replacement or repair, water levels have returned to within about 25 ft of initial static levels within 6 to 12 months. Thus, the water-level trends suggest no adverse impacts by production on long-term water supply sustainability at Los Alamos. This report summarizes production data and aquifer conditions for water production and monitor wells in the Los Alamos, New Mexico, and Los Alamos National Laboratory (LANL) area (Figure 1). Water production wells are grouped within the Guaje, Pajarito, and Otowi fields, the locations of which are shown on Figure 1. Wells from these fields supply all the potable water used for municipal and most industrial purposes in Los Alamos County (LAC), at LANL, and at Bandelier National Monument. This report has three primary objectives: (1) Provide a continuing historical record of metered well production and overall water usage; (2) Provide data to the Department of Energy (DOE) and LANL management, and Los Alamos County planners for operation of the water supply system and for long-range water resource planning; and (3) Provide water-level data from regional aquifer production wells, test wells, and monitoring wells.

Richard J. Koch; David B. Rogers

2003-03-01

239

Water supply at Los Alamos during 1993. Progress report  

SciTech Connect

This report summarizes production and aquifer conditions for water wells in the Guaje, Pajarito, and Otowi Well Fields. These wells supplied all of the potable water used for municipal and some industrial purposes in Los Alamos County and the Los Alamos National Laboratory during 1993. The wells in the Los Alamos Well Field were transferred to San Ildefonso Pueblo in 1992. Four of the wells in the Los Alamos Well Field were plugged in 1993. One of the two new wells in the Otowi Well Field became operational in 1993. The spring gallery in Water Canyon supplied nonpotable water for industrial use, while surface water from the Los Alamos Reservoir was diverted for irrigation. In 1993 no water was used from the Guaje Reservoir. Due to the maintenance and operating cost of diverting water from the reservoirs, it is not economically feasible to continue their use for irrigation. This report fulfills some of the requirements of the Los Alamos Groundwater Protection Management Program by documenting use of the groundwater for water supply and providing information hydrologic characteristics of the main aquifer. This report is a joint effort between the Laboratory Water Quality and Hydrology Group and the Utilities Department of Johnson Controls World Services Inc. (JCI). The purpose of this report is to ensure a continuing historical record and to provide guidance for management of water resources in long-range planning for the water supply system. We have issued one summary report for the period of 1947 to 1971 and 22 annual reports that contain the results of our studies of these water supplies. An additional report summarized the hydrology of the main aquifer with reference to future development of groundwater supplies. A report was issued in 1988 that examined the status of wells and future water supply.

Purtymun, W.D.; Stoker, A.K.; McLin, S.G.; Maes, M.N.; Glasco, T.A.

1995-10-01

240

El comercio de los productos transgénicos: el estado del debate internacional  

Microsoft Academic Search

Los productos transgénicos mezclan aspectos contradictorios. La manipulación genética de cultivos permite desarrollar tanto productos con toxinas insecticidas, disminuyendo el uso de defensivos agrícolas que pueden dañar el medio ambiente, como alimentos con propiedades vitamínicas y proteicas, que pueden mejorar los indicadores sociales en los países en desa- rrollo. Por otra parte, se han abierto interrogantes acerca de los posibles

María Angélica Larach; División de Comercio Internacional

241

GANANCIAS DE EFICIENCIA VERSUS COSTES DE TRANSACCIÓN DE LOS MERCADOS DE AGUA  

Microsoft Academic Search

La introducción de los mercados de agua se ha planteado en los últimos años como un instrumento eficaz para la mejora de la gestión de los recur- sos hídricos en la agricultura, centrando la atención en las ganancias econó- micas que de ellos pueden resultar. No obstante, la efectividad e incluso la viabilidad de los mercados de agua está limitada

YOLANDA MARTÍNEZ MARTÍNEZ; RENAN-ULRICH GOETZ

2007-01-01

242

POSIBILIDADES, LOGROS Y DESAFÍOS EN LA IMPLEMENTACIÓN DE MODELOS DE CALIDAD EN LOS GOBIERNOS LATINOAMERICANOS  

Microsoft Academic Search

Este trabajo revisa el significado y los alcances del concepto de calidad en el ámbito estatal, su rol en el paradigma administrativo conocido como nueva gerencia pública, los modelos más importantes, las particularidades de los gobiernos en Latinoamérica y varios de los proyectos de incorporación de programas de calidad en ellos. Su realización se basó tanto en investigación documental como

JAIME TORRES FRAGOSO

2011-01-01

243

Los grupos fricativa+nasal del polaco: realización sonora y fenómenos intermedios  

Microsoft Academic Search

El presente trabajo es un estudio de la sonoridad y de los fenómenos intermedios en la realización de los grupos consonanticos fricativa + nasal del polaco. El estudio acústico se ha realizado mediante el sistema CSL, en el que se pueden observar simultáneamente el oscilograma, el espectrograma, la onda glotal y los pulsos glotales. Los resultados del análisis han puesto

Dorota Szmidt; Joan Castellví Vives

2006-01-01

244

Contributions of chemistry in early day Los Alamos  

SciTech Connect

During 1943--1945, the premier physics laboratory in the world was at Los Alamos, but chemistry contributions were vital. Major chemical impacts on the success of the Los Alamos wartime mission included electrochemistry, which found the true melting point of plutonium metal to be hundreds of degrees lower than anticipated. This discovery had profound simplifying effects regarding crucibles to contain molten plutonium and on its production. Other significant chemical contributions involved constant purification of plutonium for reuse, producing carrier-free gamma sources at unprecedented kilo-curie levels, and high polonium work. 8 refs.

Penneman, R.A.; Meade, R.A.

1990-01-01

245

Los Alamos Using Neutrons to Stop Nuclear Smugglers  

SciTech Connect

Los Alamos National Laboratory researchers have successfully demonstrated for the first time that laser-generated neutrons can be enlisted as a useful tool in the War on Terror. The international research team used the short-pulse laser at Los Alamos's TRIDENT facility to generate a neutron beam with novel characteristics that interrogated a closed container to confirm the presence and quantity of nuclear material inside. The successful experiment paves the way for creation of a table-top-sized or truck-mounted neutron generator that could be installed at strategic locations worldwide to thwart smugglers trafficking in nuclear materials.

Favalli, Andrea; Swinhoe, Martyn

2013-06-03

246

Los Alamos Using Neutrons to Stop Nuclear Smugglers  

ScienceCinema

Los Alamos National Laboratory researchers have successfully demonstrated for the first time that laser-generated neutrons can be enlisted as a useful tool in the War on Terror. The international research team used the short-pulse laser at Los Alamos's TRIDENT facility to generate a neutron beam with novel characteristics that interrogated a closed container to confirm the presence and quantity of nuclear material inside. The successful experiment paves the way for creation of a table-top-sized or truck-mounted neutron generator that could be installed at strategic locations worldwide to thwart smugglers trafficking in nuclear materials.

Favalli, Andrea; Swinhoe, Martyn

2014-06-02

247

Pilot fruit drier for Los Azufres geothermal field, Michoacan, Mexico  

SciTech Connect

Comision Federal de Electricidad (CFE) has a Division in charge of the exploration of a geothermal reservoir located in Los Azufres, State of Michoacan. At present, CFE is only using the steam of the wells and rejecting the hot water that comes off associated with the steam. Based on a trip to the Los Azufres geothermal field in December of 1992, a design for a pilot geothermal fruit drier was undertaken for CFE. The details of the geothermal field and the local fruit production are detailed.

Lund, J.W.

1993-02-01

248

Ecosystem studies at the Los Medanos site, Eddy County, New Mexico. Volume I  

SciTech Connect

This report summarizes the results of biological studies conducted during 1980 at the Los Medanos site in southeastern New Mexico. The studies include: (1) densities and species composition of the avifauna of the Los Medanos site; (2) aquatic ecosystems of the lower Pecos drainage; (3) floristic studies at the Los Medanos site; (4) plant successional, grazing, trampling, and salt studies on the Los Medanos site; (5) soil and vegetation studies at the Los Medanos site; (6) arthropod and decomposition studies at the WIPP site; (7) amphibians, reptiles and mammals at the Los Medanos site; (8) vertebrate ecology at the Los Medanos site; and (9) statistical analysis and data management. 7 refs. (ACR)

Hart, J.S. (ed.)

1981-05-01

249

Needs assessment for fire department services and resources for the Los Alamos National Laboratory, Los Alamos, New Mexico. Final report  

SciTech Connect

This report has been developed in response to a request from the Los Alamos National Laboratory (LANL) to evaluate the need for fire department services so as to enable the Laboratory to plan effective fire protection and thereby: meet LANL`s regulatory and contractual obligations; interface with the Department of Energy (DOE) and other agencies on matters relating to fire and emergency services; and ensure appropriate protection of the community and environment. This study is an outgrowth of the 1993 Fire Department Needs Assessment (prepared for DOE) but is developed from the LANL perspective. Input has been received from cognizant and responsible representatives at LANL, DOE, Los Alamos County (LAC) and the Los Alamos Fire Department (LAFD).

NONE

1995-11-15

250

Meningococcal Disease: Risk Factors  

MedlinePLUS

... Campaign Podcast: Meningitis Immunization for Adolescents Meningitis Risk Factors Share Compartir Certain groups of people are at ... to protect yourself against meningococcal disease. Some risk factors include: Age Meningococcal disease is more commonly diagnosed ...

251

Rheumatoid factor (RF)  

MedlinePLUS

Rheumatoid factor (RF) is a blood test that measures the amount of the RF antibody in the blood. ... still have a "normal" or low rheumatoid factor (RF). Normal value ranges may vary slightly among different ...

252

Factor VII deficiency  

MedlinePLUS

... inherited disorder in which a lack (deficiency) of plasma protein factor VII leads to abnormal bleeding. ... Partial thromboplastin time ( PTT ) Plasma factor VII activity Prothrombin ... disorder is important so that the doctor can take extra care ...

253

Important Water Quality Factors  

NSDL National Science Digital Library

This site provides basic information about factors commonly analyzed in water quality studies of drinking water, waste water and natural water. The factors are listed alphabetically with descriptions and explanations about what the results of measurements mean in environmental terms.

254

A survey of macromycete diversity at Los Alamos National Laboratory, Bandelier National Monument, and Los Alamos County; A preliminary report  

SciTech Connect

The authors have completed a 5-year survey (1991--1995) of macromycetes found in Los Alamos County, Los Alamos National Laboratory, and Bandelier National Monument. The authors have compiled a database of 1,048 collections, their characteristics, and identifications. The database represents 123 (98%) genera and 175 (73%) species reliably identified. Issues of habitat loss, species extinction, and ecological relationships are addressed, and comparisons with other surveys are made. With this baseline information and modeling of this baseline data, one can begin to understand more about the fungal flora of the area.

Jarmie, N.; Rogers, F.J. [Mycology Associates, Los Alamos, NM (United States)

1997-11-01

255

Biotic and Abiotic Factors  

NSDL National Science Digital Library

This activity, from the ThinkQuest Library, has students investigate how "biotic and abiotic factors are interrelated. If one factor is changed or removed, it impacts the availability of other resources within the system." Students examine the ecosystem of an amusement park, the biotic and abiotic factors, identify five relationships between them, and speculate about how a change in one abiotic factor would affect the ecosystem.

256

The Venn Factor  

NSDL National Science Digital Library

This lesson plan provides the teacher with an activity to help students calculate the Greatest Common Factor of two or more positive integers and develop a definition based on their exploration. Students find the prime factorization of two positive numbers using factor trees and Venn diagrams to sort the prime factors. The plan includes learning objectives, materials needed, questions to ask students, assessment options, extensions, teacher self-reflection questions, and further references.

Barron, Hilary R.

2010-01-01

257

The risk of assaultive violence and alcohol availability in Los Angeles County.  

PubMed Central

OBJECTIVES. Although there is considerable evidence that alcohol consumption facilitates assaultive violence, the extent to which alcohol outlets in a community influence assaultive violence remains controversial. METHODS. To assess the geographic association between city-specific rates of assaultive violence and alcohol-outlet density, an ecologic analysis of the 74 larger cities in Los Angeles County was conducted for the 1990 reporting year. RESULTS. Sociodemographic factors alone accounted for 70% (R2 = .70) of the variance in the rate of assaultive violence in a multiple regression model. Adding the variable for alcohol-outlet density to the model yielded a significant positive slope. The magnitude of this relation indicates that in a typical Los Angeles County city (50,000 residents, 100 outlets, 570 offenses per year), one outlet was associated with 3.4 additional assaultive violence offenses in 1990. CONCLUSIONS. These findings indicate that higher levels of alcohol-outlet density are geographically associated with higher rates of assaultive violence. This association is independent of measured confounders, including city-level measures of unemployment, ethnic/racial makeup, income, age structure, city size, household size, and female-headed households.

Scribner, R A; MacKinnon, D P; Dwyer, J H

1995-01-01

258

Brief review of Rover fuel development at Los Alamos  

NASA Technical Reports Server (NTRS)

A brief review of the graphite matrix uranium fuel development efforts at Los Alamos from 1955 through 1972 is presented. The uses of graphite flour carbon black, various binders, uranium dioxide, coated UC2 particles, and zirconium carbide in this development are described.

Davidson, Keith V.

1991-01-01

259

Ozonation at the 900 cfs Los Angeles Water Purification Plant  

Microsoft Academic Search

In 1979. the California Safe Drinking Water Act established a new turbidity limit of 0.5 turbidity unit for drinking waters. To meet this new standard at the Owens River Aqueductplantin Los Angelesi aprocessinvolvingpreozonation and direct filtration was tested and selected. In addition to providing water which meets the required turbidity standard, the ozone process reduces THM levels by about 50%,

Paul W. Prendiville

1986-01-01

260

Diet and colon cancer in Los Angeles County, California  

Microsoft Academic Search

The diets of 746 colon cancer cases in Los Angeles County, California (USA) were compared with those of 746 controls matched on age, sex, race, and neighborhood. In both genders, total energy intake was associated with significantly increased risk, and calcium intake was associated with significantly decreased risk. These effects were reduced only slightly after adjustment for the nondietary risk

Ruth K. Peters; Malcolm C. Pike; David Garabrant; Thomas M. Mack

1992-01-01

261

Machine studies at the Los Alamos Proton Storage Ring.  

National Technical Information Service (NTIS)

Results from recent machine development studies at the Los Alamos Proton Storage Ring (PSR) are presented on the origin of the ''first-turn'' losses, the PSR instability, and volume H(sup (minus)) ion source development. An experiment has been performed t...

R. J. Macek

1993-01-01

262

Food Buying Practices of Mexican Americans in East Los Angeles.  

ERIC Educational Resources Information Center

As part of a pilot study of the nutritional status of Mexican American preschool children attending Head Start in East Los Angeles in the spring of 1969, questions were asked concerning their families' buying and food practices. This paper reports on the information obtained from the 21 questionnaires which were returned. Answers to the following…

Lewis, Jane S.; And Others

263

Technical manpower needs and resources at Los Alamos National Laboratory  

SciTech Connect

The Los Alamos National Laboratory has begun a program to share its scientific and technological expertise with students and teachers in the surrounding area. The goal of the Laboratory's Educational Outreach Program is to stimulate an awareness of professional opportunities in the sciences and engineering.

Freese, K.B.

1984-01-01

264

Los Angeles City College Off Campus Faculty Procedure Manual.  

ERIC Educational Resources Information Center

Directed toward off-campus faculty of Los Angeles City College, this handbook contains information about policies, procedures, facilities, and services in the following areas: emergency procedures, communication channels, employment conditions, instructional policy, records and reports, student personnel services, and the use of facilities…

Los Angeles City Coll., CA.

265

Drop Out Patterns in the East Los Angeles Community College  

ERIC Educational Resources Information Center

This study attempted to analyze the drop out problem from spatial perspectives within the context of East Los Angeles Community College, California. Selected urban land-use types, which positively and negatively influence the propensity to drop out or persist-in colleges, were selected and captured during a global positioning system (GPS)-based…

Waktola, Daniel K.

2014-01-01

266

Los Rios Transfer Statistics, Fall 1989-Spring 1991 Update.  

ERIC Educational Resources Information Center

In 1991, the Office of Research and Planning of the Los Rios Community College District (LRCCD) analyzed data provided by the California Postsecondary Education Commission to compare the district's transfer rates with statewide trends in transfer to the University of California (UC) and California State University (CSU). Major findings, for the…

Jones, Janis Cox; And Others

267

Life Science Learning Center, Los Angeles Valley College.  

ERIC Educational Resources Information Center

A description is provided of Los Angeles Valley College's Life Science Learning Center (LSLC), which provides: (1) a resource center addressed to the individualized learning needs of students served by the Biology Department; (2) a learning environment enabling students to proceed in self-paced, activity-centered, concept-oriented experiences in…

Samuels, Edward

268

Helioseismic Tests of the New Los Alamos LEDCOP Opacities  

Microsoft Academic Search

We compare the helioseismic properties of two solar models, one calibrated with the OPAL opacities and the other with the recent Los Alamos LEDCOP (Light Element Detailed Configuration Opacity) opacities. We show that, in the radiative interior of the Sun, the small differences between the two sets of opacities (up to 6% near the base of the convection zone) lead

C. Neuforge-Verheecke; J. A. Guzik; J. J. Keady; N. H. Magee; P. A. Bradley; A. Noels

2001-01-01

269

HELIOSEISMIC TESTS OF THE NEW LOS ALAMOS OPACITIES  

Microsoft Academic Search

We compare the helioseismic properties of two solar models, one calibrated with the OPAL opacities and the other with the recent Los Alamos LEDCOP opacities. We show that, in the radiative interior of the Sun, the small differences between the two sets of opacities (up to 6% near the base of the convection zone) lead to noticeable differences in the

J. GUZIK

2001-01-01

270

Helioseismic Tests of the New Los Alamos LEDCOP Opacities.  

National Technical Information Service (NTIS)

We conclude that the OPAL and LEDCOP opacity sets do about as well in the radiative interior of the Sun. We compare the helioseismic properties of two solar models, one calibrated with the OPAL opacities and the other with the recent Los Alamos LEDCOP opa...

C. Neuforge-Verheecke J. A. Guzik J. J. Keady N. H. Magee P. A. Bradley A. Noels

2001-01-01

271

Collaborative Transition Planning Systems in Los Angeles, County.  

ERIC Educational Resources Information Center

School districts and community agencies located within Los Angeles County (California) were surveyed to determine the level of transition planning from school to the world of work and community living for "students at risk." Twenty-five school districts and 10 community agencies/private schools receiving supported employment funds are profiled in…

Palace, Donna; Whitmore, William

272

Desempleo y la estructura de los mercados laborales en Colombia  

Microsoft Academic Search

Los problemas de desempleo e ingresos bajos de un sector de la fuerza laboral empleada ha sido de gran interés, tanto en países desarrollados como en vías de desarrollo. Se usan comúnmente tres hipótesis para explicar el desempleo en países en vías de desarrollo; la de crecimiento insuficiente, la demográfica (a medida que se acelera el crecimiento de la población

Ramón E. López

273

Los Angeles air pollution and asthma in children  

Microsoft Academic Search

Indices of air pollution, meteorological conditions and airborne allergens were correlated with emergency room census and hospitalizations for asthma at the Childrens Hospital of Los Angeles (CHLA) during a six-month period encompassing high and low periods of air pollution. In addition, patients in residence at the Sunair Home for Asthmatic Children (SHAC) were studied during a 10-day peak air pollution

W. Richards; S. P. Azen; J. Weiss; S. Stocking; J. Church

1981-01-01

274

SOFT FLOOR COVERING IN THE LOS ANGELES CITY SCHOOL DISTRICTS.  

ERIC Educational Resources Information Center

A STUDY REGARDING THE INSTALLATION OF CARPET IN SCHOOLS IS DISCUSSED. THE PURPOSE OF THE STUDY WAS TO HAVE A CONSULTANT REVIEW UNDER THE DIRECTION OF THE DISTRICT BUILDING AND GROUNDS SERVICES ADMINISTRATOR OF THE LOS ANGELES CITY SCHOOL DISTRICTS, THE SOFT FLOOR COVERING INSTALLATIONS AT ARAGON AVENUE AND TWENTY-FOURTH STREET SCHOOLS. SECTIONS…

CUNLIFF, DONALD D.

275

Status of the Los Alamos Heavy Ion Injector.  

National Technical Information Service (NTIS)

Design of practical induction linacs for intense heavy ion beams requires injection of multiple beams from a pulsed electrostatic accelerator at as high a voltage as practicable. Los Alamos National Laboratory is developing a 16-beam, 2 MeV, pulsed electr...

K. B. Riepe E. O. Ballard E. A. Meyer D. C. Wilson

1986-01-01

276

Progress on the Los Alamos Heavy-Ion Injector.  

National Technical Information Service (NTIS)

Heavy-ion fusion using an induction linac requires injection of multiple high-current beams from a pulsed electrostatic accelerator at as high a voltage as practical. Los Alamos National Laboratory is developing a 16-beam, 2-MeV, pulsed electrostatic acce...

D. C. Wilson K. B. Riepe E. O. Ballard E. A. Meyer R. P. Shurter

1986-01-01

277

Interseismic strain accumulation and anthropogenic motion in metropolitan Los Angeles  

Microsoft Academic Search

We use global positioning system (GPS) geodesy and synthetic aperture radar (SAR) interferometry to distinguish between interseismic strain accumulation and anthropogenic motion in metropolitan Los Angeles. We establish a relationship between horizontal and vertical seasonal oscillations of the Santa Ana aquifer, use this relationship to infer cumulative horizontal anthropogenic motions from cumulative vertical motions caused by water and oil resource

Donald F. Argus; Michael B. Heflin; Gilles Peltzer; Fréderic Crampé; Frank H. Webb

2005-01-01

278

Potpourri of Los Alamos National Laboratory foam efforts  

SciTech Connect

This presentation provides an update on microcellular foam research efforts at Los Alamos. Topics include the influence of pressure on the phase separation of poly(4-methyl-1-pentene) from organic solution, a new concept of phase diagrams, physical testing of foams, and recent emulsion polymerization results.

Williams, J.M.; Wilkerson, M.H.; Wrobleski, D.A.

1986-01-01

279

Hydrocarbon involvement in photochemical smog formation in Los Angeles atmosphere  

Microsoft Academic Search

The extensive chemical and physical measurements of the Los Angeles Reactive Pollutant Program (LARPP), made during one day of the studies, November 5, 1973, are analyzed to test current theories of hydrocarbon involvement in photochemical smog formation. It is noted that the ratio of the concentration of a reactive hydrocarbon to that for acetylene decreases regularly throughout the day. Indirect

Jack G. Calvert

1976-01-01

280

Designing More Efficient Markets: Lessons from Los Angeles Smog Control  

Microsoft Academic Search

Market-based approaches for environmental protection are beginning to take root around the world. This article attempts to improve our understanding of the performance of environmental markets by constructing and evaluating an information base on trades in Los Angeles, which includes the first detailed data on trading prices. The analysis suggests that trading activity has been shaped by the detailed regulations

Vivien Foster; Robert W. Hahn

1995-01-01

281

Descubrimiento, geografía y origen de los discursos hispanoamericanos  

Microsoft Academic Search

Imaginación del Nuevo Mundo. Diez estudios sobre los inicios de la narrativa hispanoamericana. By JOSE JUAN ARROM. México: Siglo XXI Editores, 1991. Pp. 196.Signs, Songs, and Memory in the Andes: Translating Quechua Language and Culture. By REGINA HARRISON. Austin: University of Texas Press, 1989. Pp. xvii, 233.The Armature of Conquest: Spanish Accounts of the Discovery of America, 1492–1589. By BEATRIZ

Angela I. Robledo

1994-01-01

282

Tritium monitor calibration at Los Alamos National Laboratory  

Microsoft Academic Search

Tritium in air is monitored at Los Alamos National Laboratory (LANL) with air breathing instruments based on ionization chambers. Stack emissions are continuously monitored from sample tubes which each connect to a Tritium bubble which differentially collects HTO and HT. A set of glass vials of glycol capture the HTO. The HT is oxidized with a palladium catalyst and the

C. J. Bjork; D. J. Aikin; T. W. Houlton

1997-01-01

283

Los Alamos National Laboratory Weapons Neutron Research Facility  

SciTech Connect

The Weapons Neutron Research (WNR) spallation neutron source utilizes 800-MeV protons from the Los Alamos Meson Physics linac. The proton beam transport system, the target systems, and the data acquisition and control system are described. Operating experience, present status, and planned improvements are discussed.

Woods, R.

1981-01-01

284

Los Angeles Street Kids: New Occupations for Life Program  

Microsoft Academic Search

In the same sense that health intervention focused on the daily occupations of the well?elderly can promote successful ageing, programs aimed at the daily occupations of at?risk youth may act as a potential deterrent to street gang activity. In the city of Los Angeles, thousands of young people come under the influence of gang culture and in turn, lead lifestyles

Carolyn Snyder; Florence Clark; Brian Young

1998-01-01

285

Equilibrium and stability of the Los Alamos spheromak  

SciTech Connect

The open mesh flux conserver (MFC) on the Los Alamos spheromak (CTX) has been equipped with a large number of Rogowski loops measuring the current in the individual segments of the MFC, providing a complete picture of the surface current pattern induced by the equilibrium and oscillations of the confined plasma. An analysis was made of the data from these Rogowski loops.

Marklin, G.

1984-01-01

286

The Controlled-Air Incinerator at Los Alamos  

SciTech Connect

The Controlled-Air Incinerator (CAI) at Los Alamos is being modified and upgraded to begin routine operations treating low-level mixed waste (LLMW), radioactively contaminated polychlorinated biphenyl (PCB) wastes, low-level liquid wastes, and possibly transuranic (TRU) wastes. This paper describes those modifications. Routine waste operations should begin in late FY95.

Newmyer, J.N.

1994-04-01

287

REPORT ON PARA MEDICAL CURRICULA AT LOS ANAGELES CITY COLLEGE.  

ERIC Educational Resources Information Center

AT THE TIME OF THIS REPORT, LOS ANGELES CITY COLLEGE OFFERED PROGRAMS LEADING TO EMPLOYMENT IN 13 HEALTH RELATED AND PARAMEDICAL OCCUPATIONS. REVIEW OF THESE PROGRAMS AND RELEVANT LITERATURE LED TO NINE RECOMMENDATIONS FOR INCREASING THE EFFECTIVENESS OF THE PROGRAMS--(1) CONSTRUCTION OF A SPECIAL FACILITY FOR ALLIED HEALTH SERVICES EDUCATION, (2)…

WHALEN, PAUL L.

288

Urban America: Policy Choices for Los Angeles and the Nation.  

ERIC Educational Resources Information Center

This volume presents 13 essays on urban problems in the United States, particularly in Los Angeles (California) following the 1992 riots, and policy options for the future. Part 1 addresses policies of the past three decades; Part 2 looks at children, youth, and families; Part 3 discusses crime and criminal justice; and Part 4 examines public…

Steinberg, James B., Ed.; And Others

289

Los Alamos proton-storage-ring extraction system  

SciTech Connect

The unprecedented peak and average proton currents and extraction rates from the Proton Storage Ring (PSR) under construction at the Los Alamos National Laboratory present new problems in beam extraction. Activation caused by beam spill must be minimal to permit hands-on maintenance. Timing requirements are uncommonly stringent. Solutions to these problems are outlined below.

Hudgings, D.W.; Jason, A.J.

1981-01-01

290

Student Strikes in East Los Angeles High Schools  

ERIC Educational Resources Information Center

There is much unrest among Mexican-American students in Los Angeles because the state has not adhered to the 1849 Treaty of Guadalupe-Hidalgo which says bilingual and bicultural education will be compulsory for Mexican-Americans. (Author/AF)

Heussenstamm, F. K.

1972-01-01

291

Los Angeles Riot Study Method: Negro Reaction Survey.  

National Technical Information Service (NTIS)

The report provides a detailed description of the data-gathering and data-analysis procedures for the sample of Negro respondents interviewed during the Los Angeles Riot Study. The basic data-gathering procedure for several ancillary samples is also provi...

T. M. Tomlinson D. L. TenHouten

1967-01-01

292

The Los Angeles Double Deck Bus Demonstration Project: An Evaluation.  

National Technical Information Service (NTIS)

This report is the third of three documents that constitute an evaluation of the Double Deck Bus (DDB) project sponsored by UMTA. The DDB project involved the purchase and operation of contemporary DDBs in New York City and Los Angeles (July 1974-June 197...

C. H. McCall H. J. Simkowitz

1978-01-01

293

Mercury: The Los Alamos ICF KrF laser system  

SciTech Connect

The Mercury KrF laser facility at Los Alamos is being built with the benefit of lessons learned from the Aurora system. An increased understanding of KrF laser engineering, and the designed implementation of system flexibility, will permit Mercury to serve as a tested for a variety of advanced KrF technology concepts.

Czuchlewski, S.J.; York, G.W.; Bigio, I.J.; Brucker, J.; Hanson, D.; Honig, E.M.; Kurnit, N.; Leland, W.; McCown, A.W.; McLeod, J.; Rose, E.; Thomas, S.; Thompson, D.

1993-01-19

294

Plasma and ion beam processing at Los Alamos  

SciTech Connect

Efforts are underway at Los Alamos National Laboratory to utilize plasma and intense ion beam science and technology of the processing of advanced materials. A major theme involves surface modification of materials, e.g., etching, deposition, alloying, and implantation. In this paper, we concentrate on two programs, plasma source ion implantation and high-intensity pulsed ion beam deposition.

Rej, D.J.; Davis, H.A.; Henins, I. [and others

1994-07-01

295

Risk Communication in Los Angeles: A Case Study  

Microsoft Academic Search

The communication program of the Los Angeles Department of Water and Power (LADWP) has been largely informational—messages have historically been passed from the utility to the public without citizens being involved in any substantive way in decisions about water quality issues. In 1985, however, when LADWP made plans to construct an aeration tower to strip contaminants from groundwater without notifying

Marjorie G. Shovlin; Sandra S. Tanaka

1990-01-01

296

Brief history of the Los Alamos laser programs  

SciTech Connect

The laser programs at Los Alamos began in 1969 to investigate the feasibility of laser-induced fusion. However, within a year they had been expanded to include a number of other applications including laser isotope separation. These programs now compose a substantial part of the Laboratory's research programs.

Boyer, K.

1983-01-01

297

Dia de los Muertos: An Illustrated Essay and Bibliography.  

ERIC Educational Resources Information Center

Among Mexico's most original traditions is the holiday dedicated to honoring the dead, Dia de los Muertos, November 2. This tradition combines aspects that define the national spirit. At the same time that it is a solemn festivity to remember the dead, it becomes a fiesta in its own right. Death, more than a thing to be feared, becomes the motif…

California Univ., Santa Barbara. University Library.

298

Diarrea intratable causada por anomalías congénitas de los enterocitos  

Microsoft Academic Search

ExtractoFundamento: La diarrea intratable de la lactancia representa un problema grave que conlleva un grado elevado de morbilidad y mortalidad. Estos casos requieren una asistencia dedicada tanto por parte de los padres como del personal médico, dado que no se dispone de remedios fáciles. La escasez de pacientes indica que para progresar en el conocimiento de estos trastornos son necesarios

Alan D. Phillips

2006-01-01

299

A Vision for the Los Angeles Community College District.  

ERIC Educational Resources Information Center

The "Vision Statement" brochure by the Chancellor of the Los Angeles Community College District (LACCD) "sets forth the path and direction he wants the District's nine community colleges to take in preparing students for the challenges of the 21st century" and emphasizes that the district will stimulate and assure a learning environment where…

Phelps, Donald G.

300

Working Smart: The Los Angeles Workplace Literacy Project. Final Report.  

ERIC Educational Resources Information Center

The Working Smart workplace literacy project was sponsored by a public school district and several profit and nonprofit companies and conducted for the hotel and food industry in the Los Angeles area. Literacy instruction was merged with job requirements of the customer service job classifications. Videodisc courseware was developed, as were…

Los Angeles Unified School District, CA. Div. of Adult and Occupational Education.

301

Fusion engineering at the Los Alamos Scientific Laboratory  

Microsoft Academic Search

From international meeting on the technology of controlled thermonuclear ; fusion experiments and the engineering aspects of fusion reactors; Austin, Texas, ; USA (20 Nov 1972). In technology of controlled thermonuclear fusion experiments ; and the engineering aspects of fusion reactors. The ZT-1 toroidal z-pinch ; experiment at Los Alamos uses a 500-kJ capacitor bank to charge a storage ;

1974-01-01

302

Inertial confinement fusion at the Los Alamos National Laboratory  

SciTech Connect

The Los Alamos National Laboratory is contributing to the resolution of key issues in the US Inertial-Confinement-Fusion Program and plans to play a strong role in the experimental program at the National Ignition Facility when it is completed.

Lindman, E.; Baker, D.; Barnes, C.; Bauer, B.; Beck, J.B. [and others

1997-11-01

303

Factor X deficiency  

MedlinePLUS

Factor X deficiency is a disorder caused by too little of a protein called factor X in the blood. It leads to problems with ... is usually a higher chance of bleeding. Factor X deficiency is often caused by a defect of ...

304

Tiny Cross Causes a Stir in Los Angeles  

NSDL National Science Digital Library

The City of Angels may be bracing for another dramatic event and, oddly enough, it may have nothing to do with the climatic conditions in that region of the country. Recently the local chapter of the American Civil Liberties Union (ACLU) announced that it would sue Los Angeles County unless the governmental entity comes up with a plan within 14 days to remove a tiny cross from the County's official seal. The seal (which has been in use for 47 years) features the goddess Pomona holding various agricultural products grown in the county, along with symbols of the area's dairy, fishing, aerospace and oil industries. According to the county's website the tiny cross on the seal represents "the influence of the church and the missions of California." In a letter to the Los Angeles County board of supervisors, the executive director of the ACLU of Southern California noted: "When the County transmitted its newly designed seal to the California Secretary of State on February 27, 1957, the transmittal letter stated in plain language that the cross was included to represent religion." Responding to this letter, County Supervisors Michael Antonvich and Don Knabe announced that "Our history cannot be rewritten and it will not be rewritten," and went on to remark that the demand to remove the cross from the seal was "right out of a George Orwell novel." The first link will take users to a news piece about the recent letter sent by the ACLU regarding the cross on the Los Angeles County seal offered by the Los Angeles Daily News. The second link leads to a like-minded piece offered by the Los Angeles Times [Free registration required] that discusses the reaction to the letter from the Board of Supervisors. The third link leads to a pointed editorial offered by the Los Angeles Daily News this past Tuesday. The fourth link leads to a webpage provided by Los Angeles County that explains the iconography and symbols used on the official seal. The fifth link leads to the religious liberty area of the ACLU website, which describes the various issues that the organization provides legal consultation and aid to, such as school prayer, religious freedom, and the use and placement of the Ten Commandments. The sixth and final link leads to the homepage of the Pew Forum on Religion & Public Life, where visitors can browse their publications, read news about various ongoing stories that address the broad topic of religion and public life, and read transcripts of events and discussions sponsored by the Forum.

305

Audit Report, "Fire Protection Deficiencies at Los Alamos National Laboratory"  

SciTech Connect

The Department of Energy's Los Alamos National Laboratory (Los Alamos) maintains some of the Nation's most important national security assets, including nuclear materials. Many of Los Alamos' facilities are located in close proximity to one another, are occupied by large numbers of contract and Federal employees, and support activities ranging from nuclear weapons design to science-related activities. Safeguarding against fires, regardless of origin, is essential to protecting employees, surrounding communities, and national security assets. On June 1, 2006, Los Alamos National Security, LLC (LANS), became the managing and operating contractor for Los Alamos, under contract with the Department's National Nuclear Security Administration (NNSA). In preparation for assuming its management responsibilities at Los Alamos, LANS conducted walk-downs of the Laboratory's facilities to identify pre-existing deficiencies that could give rise to liability, obligation, loss or damage. The walk-downs, which identified 812 pre-existing fire protection deficiencies, were conducted by subject matter professionals, including fire protection experts. While the Los Alamos Site Office has overall responsibility for the effectiveness of the fire protection program, LANS, as the Laboratory's operating contractor, has a major, day-to-day role in minimizing fire-related risks. The issue of fire protection at Los Alamos is more than theoretical. In May 2000, the 'Cerro Grande' fire burned about 43,000 acres, including 7,700 acres of Laboratory property. Due to the risk posed by fire to the Laboratory's facilities, workforce, and surrounding communities, we initiated this audit to determine whether pre-existing fire protection deficiencies had been addressed. Our review disclosed that LANS had not resolved many of the fire protection deficiencies that had been identified in early 2006: (1) Of the 296 pre-existing deficiencies we selected for audit, 174 (59 percent) had not been corrected; and, (2) A substantial portion of the uncorrected deficiencies, 86 (49 percent) were considered by the walk-down teams to be significant enough to warrant compensatory actions until the deficiency was corrected or was tracked to closure through implementation of corrective actions. Further, we found that 32 of the significant deficiencies had been closed by the previous Los Alamos contractor, prior to LANS assuming responsibility for operation of the Laboratory, even though the deficiencies had not been corrected. A fire protection expert provided technical support during the audit. As an example of uncorrected problems, LANS had not resolved, by performing periodic tests, a deficiency identified in 2006 regarding a kitchen hood fire suppression system in a facility located within the Los Alamos Neutron Science Center. Such systems are required to be tested twice a year by the National Fire Protection Association standard, a standard that had been adopted by Department of Energy under DOE Order 420.1B. Yet, in 2006, the LANS walk-down team recognized that this system had not been inspected since May 2004 and noted that deficient suppression systems could result in significantly high levels of property damage and loss. After we brought this issue to management's attention on February 6, 2009, LANS officials stated that the Laboratory would correct this deficiency. As with the problems involving the fire suppression system, we observed that LANS had not always corrected life safety deficiencies involving building exits at one of its primary facilities. This included providing a secondary emergency exit for a building with occupants on multiple floor levels. LANS had removed personnel from the third floor and improved the sprinkler system of the facility, but it had still not provided a secondary exit for personnel on the second floor by the time we completed our review. NNSA has since stated that this fire protection issue will be completely addressed by relocating personnel from the second floor. Perhaps most serious, our testing revealed that a number of deficien

None

2009-06-01

306

Aerostructural safety factor criteria  

NASA Technical Reports Server (NTRS)

The present modification of the conventional safety factor method for aircraft structures evaluation involves the expression of deterministic safety factors in probabilistic tolerance limit ratios; these are found to involve a total of three factors that control the interference of applied and resistive stress distributions. The deterministic expression is extended so that it may furnish a 'relative ultimate safety' index that encompasses all three distribution factors. Operational reliability is developed on the basis of the applied and the yield stress distribution interferences. Industry standards are suggested to be derivable from factor selections that are based on the consequences of failure.

Verderaime, V.

1992-01-01

307

Case-control study of intracranial meningiomas in women in Los Angeles County, California  

SciTech Connect

A case-control study was conducted among women in Los Angeles County to investigate possible causes of intracranial meningiomas. Questionnaires sought information from patients and from a neighbor of each one on characteristics and past experiences that might be associated with the development of this disease. Information was obtained on 188 matched patient-neighbor pairs. Three primary factors appeared to be associated with meningioma occurrence: 1) a history of head trauma (odds ratio = 2.0, p = 0.01), 2) consumption of certain cured meats (odds ratio = 2.8, p = less than 0.01), and 3) exposure to medical and dental diagnostic X-rays to the head. For diagnostic X-rays, the strongest association was with early exposure (less than 20 yr old) to full-mouth dental X-ray series (odds ratio = 4.0, p less than 0.01).

Preston-Martin, S.; Paganini-Hill, A.; Henderson, B.E.; Pike, M.C.; Wood, C.

1980-07-01

308

Active Damping of the E-P Instability at the Los Alamos Proton Storage Ring  

SciTech Connect

A prototype of an analog, transverse (vertical) feedback system for active damping of the two-stream (e-p) instability has been developed and successfully tested at the Los Alamos Proton Storage Ring (PSR). This system was able to improve the instability threshold by approximately 30% (as measured by the change in RF buncher voltage at instability threshold). The feedback system configuration, setup procedures, and optimization of performance are described. Results of several experimental tests of system performance are presented including observations of instability threshold improvement and grow-damp experiments, which yield estimates of instability growth and damping rates. A major effort was undertaken to identify and study several factors limiting system performance. Evidence obtained from these tests suggests that performance of the prototype was limited by higher instability growth rates arising from beam leakage into the gap at lower RF buncher voltage and the onset of instability in the horizontal plane, which had no feedback.

Macek, R.J.; /Los Alamos; Assadi, S.; /Oak Ridge; Byrd, J.M.; /LBL, Berkeley; Deibele, C.E.; Henderson, S.D.; /Oak Ridge; Lee, S.Y.; /Indiana U.; McCrady, R.C.; /Los Alamos; Pivi, M.F.T.; /SLAC; Plum, M.A.; /Oak Ridge; Walbridge, S.B.; /Indiana U.; Zaugg, T.J.; /Los Alamos

2008-03-17

309

Alcohol and breast cancer risk among Asian-American women in Los Angeles County  

PubMed Central

Introduction The role of alcohol and breast cancer risk in Asians has not been well studied. Recent studies suggest that even moderate alcohol intake may be associated with an increase in breast cancer risk, and this may be particularly relevant as alcohol intake is traditionally low among Asians. Methods We investigated the association between lifetime alcohol intake (including frequency, quantity, duration, timing, and beverage type) and breast cancer in a population-based case-control study of 2,229 Asian Americans diagnosed with incident breast cancer and 2,002 matched control women in Los Angeles County. Additionally, we examined the relation between current alcohol intake and serum concentrations of sex-hormones and growth factors in a subset of postmenopausal control women. Results Regular lifetime alcohol intake was significantly higher in US-born than non-US-born Asian Americans (P < 0.001) and almost twice as common in Japanese- than in Chinese- and Filipino-Americans (P < 0.001). Breast cancer risk increased with increasing alcohol intake among US-born Asian Americans; the odds ratios (ORs) per 5 grams per day and per 10 years of drinking were 1.21 (95% confidence interval (CI) 1.00 to 1.45) and 1.12 (95% CI, 0.98 to 1.28), respectively. Regular alcohol intake was a significant risk factor for Japanese-, but not for Chinese- and Filipino-Americans. Current consumers compared with nondrinkers showed lower concentrations of insulin-like growth factor binding protein 3 (P = 0.03) and nonsignificantly higher concentrations of estrone and androgens. Conclusions Regular lifetime alcohol intake is a significant breast cancer risk factor in US-born Asian Americans and Japanese Americans, emphasizing the importance of this modifiable lifestyle factor in traditionally low-risk populations.

2012-01-01

310

Estudio de los efectos de la ayuda al desarrollo sobre el comportamiento fiscal de los gobiernos en Centroamérica  

Microsoft Academic Search

Desde su aparición, el papel y la efectividad de la ayuda al desarrollo ha sido una cuestión muy debatida tanto por la comunidad científica como por otras esferas de la sociedad, políticos, técnicos y evidentemente, la población civil. Pese al notable descenso en los flujos de ayuda internacional durante la última década del siglo pasado, esta vía de financiación sigue

Mariola Gozalo Delgado

2006-01-01

311

NEPA and NHPA- successful decommissioning of historic Manhattan Project properties at Los Alamos National Laboratory, Los Alamos, New Mexico  

Microsoft Academic Search

This paper describes experiences at Los Alamos National Laboratory during the process of planning and executing decommissioning and decontamination activities on a number of properties constructed as part of the Manhattan project. Many of these buildings had been abandoned for many years and were in deteriorating condition, in addition to being contaminated with asbestos, lead based paints and high explosive

E. D. McGehee; A. K. Pendergrass

1997-01-01

312

Cloning and characterization of LOS1, a Saccharomyces cerevisiae gene that affects tRNA splicing.  

PubMed Central

Saccharomyces cerevisiae strains carrying los1-1 mutations are defective in tRNA processing; at 37 degrees C, such strains accumulate tRNA precursors which have mature 5' and 3' ends but contain intervening sequences. Strains bearing los1-1 and an intron-containing ochre-suppressing tRNA gene, SUP4(0), also fail to suppress the ochre mutations ade2-1(0) and can1-100(0) at 34 degrees C. To understand the role of the LOS1 product in tRNA splicing, we initiated a molecular study of the LOS1 gene. Two plasmids, YEpLOS1 and YCpLOS1, that complement the los1-1 phenotype were isolated from the YEp24 and YCp50 libraries, respectively. YEpLOS1 and YCpLOS1 had overlapping restriction maps, indicating that the DNA in the overlapping segment could complement los1-1 when present in multiple or single copy. Integration of plasmid DNA at the LOS1 locus confirmed that these clones contained authentic LOS1 sequences. Southern analyses showed that LOS1 is a single copy gene. The locations of the LOS1 gene within YEpLOS1 and YCpLOS1 were determined by deletion and gamma-delta mapping. Two genomic disruptions of the LOS1 gene were constructed, i.e., an insertion of a 1.2-kilobase fragment carrying the yeast URA3 gene, los1::URA3, and a 2.4-kilobase deletion from the LOS1 gene, los1-delta V. Disruption or deletion of most of the LOS1 gene was not lethal; cells carrying the disrupted los1 alleles were viable and had phenotypes similar to those of cells carrying the los1-1 allele. Thus, it appears that the los1 gene product expedites tRNA splicing at elevated temperatures but is not essential for this process. Images

Hurt, D J; Wang, S S; Lin, Y H; Hopper, A K

1987-01-01

313

Oversimplifying quantum factoring.  

PubMed

Shor's quantum factoring algorithm exponentially outperforms known classical methods. Previous experimental implementations have used simplifications dependent on knowing the factors in advance. However, as we show here, all composite numbers admit simplification of the algorithm to a circuit equivalent to flipping coins. The difficulty of a particular experiment therefore depends on the level of simplification chosen, not the size of the number factored. Valid implementations should not make use of the answer sought. PMID:23846653

Smolin, John A; Smith, Graeme; Vargo, Alexander

2013-07-11

314

The engineering institute of Los Alamos National Laboratory  

SciTech Connect

Los Alamos National Laboratory (LANL) and the University of California, San Diego (UCSD) have taken the unprecedented step of creating a collaborative, multi-disciplinary graduate education program and associated research agenda called the Engineering Institute. The mission of the Engineering Institute is to develop a comprehensive approach for conducting LANL mission-driven, multidisciplinary engineering research and to improve recruiting, revitalization, and retention of the current and future staff necessary to support the LANL' s national security responsibilities. The components of the Engineering Institute are (1) a joint LANL/UCSD degree program, (2) joint LANL/UCSD research projects, (3) the Los Alamos Dynamic Summer School, (4) an annual workshop, and (5) industry short courses. This program is a possible model for future industry/government interactions with university partners.

Farrar, Charles R [Los Alamos National Laboratory; Park, Gyuhae [Los Alamos National Laboratory; Cornwell, Phillip J [Los Alamos National Laboratory; Todd, Michael D [UCSD

2008-01-01

315

Status of optical model activities at Los Alamos National Laboratory  

SciTech Connect

An update will be given of activities at Los Alamos National Laboratory aimed at developing optical model potentials for applied calculations. Recent work on a coupled-channels potential for neutron reactions on {sup 241,243}Am and spherical neutron potential updates for {sup 56}Fe and {sup 59}Co will be presented, together with examples of their application in nuclear reaction calculations with the GNASH code system. New potentials utilized in evaluations at Livermore for {sup 12}C, {sup 14}N and {sup 16}O are described and additional potentials from earlier analyses at Los Alamos of Ti, V, and Ni data are made available for possible inclusion in the Reference Input Parameter Library (RIPL) for nuclear model calculations of nuclear data. Specific activities directed at development of the optical potential segment of the RIPL will be summarized.

Young, P.G.

1995-12-01

316

Integrated monitoring technology developments at Los Alamos National Laboratory  

SciTech Connect

Los Alamos National Laboratory staff have participated in the development and installation of unattended monitoring systems in facilities in Europe, North America, Asia, and Central Asia. These systems were designed to respond to needs generated by safeguards inspectors and plant operators to have around-the-clock inspection capabilities. The unattended monitoring systems in support of International Atomic Energy Agency (IAEA) safeguards require that the inspectors visit the facilities at intervals of 1-3 months rather than having a continuous presence. A first generation of instruments and software was developed to instrument facilities from approximately 1988-1996 and is still in use today. This paper describes a second generation of instrumentation and software now under development at Los Alamos to meet the increased needs of the end users. 6 refs., 4 figs.

Klosterbuer, S.F.; Abhold, M.E.; Buenafe, C. [and others

1997-10-01

317

Design and implementation of a LOS microwave channel simulator  

NASA Astrophysics Data System (ADS)

The paper presents the design and implementation of a line-of-sight (LOS) microwave channel simulator. The basic principle is to reproduce channel transfer functions given by their amplitude and group delay characteristics by driving a linear transversal filter with pre-computed data. The transfer functions can be either collected from measurements in the field or derived from any analytical modeling of the LOS microwave channel. It is shown that a thirteen tap filter with a 70 MHz period leads to accurate real-time simulations of selective fading in a 50 MHz bandwidth. The control interface, microprocessor-based, allows an efficient and smooth use of the simulator. Finally, hardware problems and technological solutions related to the implementation are presented.

Vandamme, Patrick; Clavier, Remi; Acx, Maurice

1986-12-01

318

Tiger Team Assessment of the Los Alamos National Laboratory  

SciTech Connect

This report documents the Tiger Team Assessment of the Los Alamos National Laboratory (LANL) located in Los Alamos, New Mexico. LANL is operated for the US Department of Energy (DOE) by the University of California. The Tiger Team Assessment was conducted from September 23 to November 8, 1991, under the auspices of the DOE Office of Special Projects, Office of Assistant Secretary for Environment, Safety and Health. The assessment was comprehensive, encompassing environmental, safety, and health (ES H) disciplines; management; and contractor and DOE self-assessments. Compliance with applicable Federal, state, and local regulations; applicable DOE Orders; best management practices; and internal LANL site requirements was assessed. In addition, an evaluation of the adequacy and effectiveness of the DOE and the site contractors' management of ES H/quality assurance programs was conducted. This volume discusses findings concerning the environmental assessment.

Not Available

1991-11-01

319

Penetrating radiation: applications at Los Alamos National Laboratory  

NASA Astrophysics Data System (ADS)

Los Alamos has used penetrating radiography extensively throughout its history dating back to the Manhattan Project where imaging dense, imploding objects was the subject of intense interest. This interest continues today as major facilities like DARHT1 have become the mainstay of the US Stockpile Stewardship Program2 and the cornerstone of nuclear weapons certification. Meanwhile, emerging threats to national security from cargo containers and improvised explosive devices (IEDs) have invigorated inspection efforts using muon tomography, and compact x-ray radiography. Additionally, unusual environmental threats, like those from underwater oil spills and nuclear power plant accidents, have caused renewed interest in fielding radiography in severe operating conditions. We review the history of penetrating radiography at Los Alamos and survey technologies as presently applied to these important problems.

Watson, Scott; Hunter, James; Morris, Christopher

2013-09-01

320

Changing Times: Los Angeles in Photographs, 1920-1990  

NSDL National Science Digital Library

From Raymond Chandler's hardboiled gumshoes to the decline and fall of the city's streetcar system, the City of Angels underwent a dramatic transformation from 1920 to 1990. This remarkable digital archive offered by the UCLA Charles E. Young Research Library Department of Special Collections brings together over 5700 photographs from that period. Culled from the Los Angeles Times and Los Angeles Daily News photographic archives of 3 million photographs, this collection covers topics that include religion, popular culture, urban development, law enforcement, and the entertainment industry. Visitors can browse through a list of subjects or search for specific items of interest by keyword. To get started, visitors may wish to search for "Bud Abbott", "Oil Wells", and "Urban renewal".

321

Holiday Factor Trees  

NSDL National Science Digital Library

To review the idea of factor trees and prime factorization I have the students make Holiday Factor Trees. I created a template that looks like a Christmas tree that the students can trace out. We use green paper for the top of the tree and brown paper for the trunk of the tree. Each student then picks a number to find the prime factorization for. It might be helpful to assign each student a number; therefore, they do not all end up doing the same number. I then have the students make a star for the top of their tree which they write their assigned number on. Next, they cut out construction paper bulbs that become the factors on their factor tree. (Pre cut stars and bulbs may be helpful for this as well). You can choose to do any color bulbs, but one thing that I had my student do was to use the same color for the prime numbers at the bottom of the tree therefore prime factors stand out and look unified. On the trunk of the tree the students also wrote the final prime factorization using exponents. Example:1 Yellow Star: 644 multicolored Bulbs: 8, 8,4,46 Red Prime Factors Bulbs: 2,2,2,2,2,2,

2011-12-06

322

Radiation view factor program  

NASA Technical Reports Server (NTRS)

Computer program, RAVFAC, calculates diffuse radiation view factors, using contour integrals. Technique is combined with finite difference /double summation/ technique to compose total program package.

Lovin, J. K.; Lubkowitz, A. W.

1971-01-01

323

Magnets for the proton storage ring at Los Alamos  

SciTech Connect

The Proton Storage Ring at Los Alamos will store 800-MeV protons from the LAMPF accelerator. The magnets are mostly dc excited, of high quality. Special features include construction of a curved 36/sup 0/ laminated dipole core on a straight reference bar, septum magnets with sol-gel glassy insulation, and a high-gradient dipole to strip H/sup -/ to H/sup 0/ for injection.

Harvey, A.

1983-01-01

324

America's Urban Crisis a Decade After the Los Angeles Riots  

Microsoft Academic Search

The tenth anniversary of the April 1992 riots in Los Angeles—which left fifty- five people dead and caused more than $1 billion in property damage,the most costly in the nation's history—sparked a small industry of reports and assessments by think tanks and the news media. During the week before the anniversary,reporters from almost every major newspaper were swarm- ing around

Peter Dreier

2003-01-01

325

Interseismic strain accumulation and anthropogenic motion in metropolitan Los Angeles  

NASA Astrophysics Data System (ADS)

We use global positioning system (GPS) geodesy and synthetic aperture radar (SAR) interferometry to distinguish between interseismic strain accumulation and anthropogenic motion in metropolitan Los Angeles. We establish a relationship between horizontal and vertical seasonal oscillations of the Santa Ana aquifer, use this relationship to infer cumulative horizontal anthropogenic motions from cumulative vertical motions caused by water and oil resource management, and estimate horizontal interseismic velocities corrected for anthropogenic effects. Vertical anthropogenic rates from 1992 to 1999 are slower than 3 mm yr-1 in the Santa Ana and San Gabriel aquifers and faster than 5 mm yr-1 in the Chino aquifer and in many oil fields. Inferred horizontal anthropogenic velocities are faster than 1 mm yr-1 at 18 of 46 GPS sites. Northern metropolitan Los Angeles is contracting, with the 25 km south of the San Gabriel Mountains shortening at 4.5 ± 1 mm yr-1 (95% confidence limits). The thrust fault in an elastic edge dislocation model of the observed strain is creeping at 9 ± 2 mm yr-1 beneath and north of a position 6 ± 2 km deep and 8 ± 8 km north of downtown Los Angeles. The model fault is near the Los Angeles segment of the Puente Hills thrust but south of the Sante Fe Springs segment of the thrust. Disagreement between the 6 km locking depth in the model and the 15 km seismogenic depth inferred from earthquakes suggests that the elastic continuum model may be unsatisfactory; models with different stiffnesses of sedimentary basin and crystalline basement must be investigated.

Argus, Donald F.; Heflin, Michael B.; Peltzer, Gilles; Crampé, FréDeric; Webb, Frank H.

2005-04-01

326

Interseismic strain accumulation and anthropogenic motion in metropolitan Los Angeles  

NASA Astrophysics Data System (ADS)

We use global positioning system (GPS) geodesy and synthetic aperture radar (SAR) interferometry to distinguish between interseismic strain accumulation and anthropogenic motion in metropolitan Los Angeles. We establish a relationship between horizontal and vertical seasonal oscillations of the Santa Ana aquifer, use this relationship to infer cumulative horizontal anthropogenic motions from cumulative vertical motions caused by water and oil resource management, and estimate horizontal interseismic velocities corrected for anthropogenic effects. Vertical anthropogenic rates from 1992 to 1999 are slower than 3 mm/yr in the Santa Ana and San Gabriel aquifers and faster than 5 mm/yr in the Chino aquifer and in many oil fields. Inferred horizontal anthropogenic velocities are faster than 1 mm/yr at 18 of 46 GPS sites. Northern metropolitan Los Angeles is contracting, with the 25 km south of the San Gabriel mountains shortening at 4.5 ±1 mm/yr (95% confidence limits). The thrust fault in an elastic edge dislocation model of the observed strain is creeping at 9 ±2 mm/yr beneath and north of a position 6 ±2 km deep and 8 ±8 km north of downtown Los Angeles. The model fault is near the Los Angeles segment of the Puente Hills thrust but south of the Sante Fe Springs segment of the thrust. Disagreement between the 6 km locking depth in the model and the 15 km seismogenic depth inferred from earthquakes suggests that the elastic continuum model may be unsatisfactory; models with different stiffnesses of sedimentary basin and crystalline basement must be investigated.

Argus, D. F.; Heflin, M. B.; Peltzer, G.; Crampe, F.; Webb, F. H.

2005-05-01

327

Los Alamos National Laboratory's high-performance data system  

SciTech Connect

Los Alamos National Laboratory is designing a High-Performance Data System (HPDS) that will provide storage for supercomputers requiring large files and fast transfer speeds. The HPDS will meet the performance requirements by managing data transfers from high-speed storage systems connected directly to a high-speed network. File and storage management software will be distributed in workstations. Network protocols will ensure reliable, wide-area network data delivery to support long-distance distributed processing. 3 refs., 2 figs.

Mercier, C.; Chorn, G.; Christman, R.; Collins, B.

1991-01-01

328

FOSTERING COMMERCIAL TRANSIT: ALTERNATIVES IN GREATER LOS ANGELES  

Microsoft Academic Search

SUMMARY As Los Angeles grapples with traffic and related air pollution problems, congestion pricing—tolls that vary by time-of-day, depending upon traffic levels—may be introduced to reduce congestion and the air pollution it generates. Congestion pricing will likely foster a mix of commercial transit alternatives to serve those who find automobile usage too costly. Regulatory and other barriers, however, currently stand

329

Biomedical applications on laser technology at Los Alamos  

SciTech Connect

Los Alamos has a long history of research in laser technology, and over the past few years we have begun to build a program directing some of that technology to a variety of applications in biology and medicine. As examples, two of these activities will be described in this manuscript: the use of a laser interferometer to measure the microwave absorption spectrum of DNA, and spectral measurements of the secondary light produced during laser corneal ablation.

Bigio, I.J.; Loree, T.R.

1990-01-01

330

RF superconductivity research and development at Los Alamos National Laboratory  

Microsoft Academic Search

Los Alamos National Laboratory is engaged in two distinct areas of RF superconductivity research and development. One program is devoted to studying the RF properties of high-temperature superconductors (HTS) and assessing their potential for accelerator-cavity applications. Our best results to date have come from YBa sub 2 Cu sub 3 O sub 7 films (0.8 microns) electron-beam deposited onto LaGaO

D. W. Cooke; E. R. Gray; R. J. Houlton; G. P. Lawrence; J. A. McGill; E. Meyer; C. Morris; B. Rusnak; T. P. Starke

1989-01-01

331

Evolution of some Los Alamos flux compression programs  

SciTech Connect

When we were approached to give a general discussion of some aspects of the Los Alamos flux compression program, we decided to present historical backgrounds of a few topics that have some relevance to programs that we very much In the forefront of activities going on today. Of some thirty abstracts collected at Los Alamos for this conference, ten of them dealt with electromagnetic acceleration of materials, notably the compression of heavy liners, and five dealt with plasma compression. Both of these topics have been under investigation, off and on, from the time a formal flux compression program was organized at Los Alamos. We decided that a short overview of work done In these areas would be of some interest. Some of the work described below has been discussed in Laboratory reports that, while referenced and available, are not readily accessible. For completeness, some previously published, accessible work Is also discussed but much more briefly. Perhaps the most striking thing about the early work In these two areas is how primitive much of it was when compared to the far more sophisticated, related activities of today. Another feature of these programs, actually for most programs, Is their cyclic nature. Their relevance and/or funding seems to come land go. Eventually, many of the older programs come back into favor. Activities Involving the dense plasma focus (DPF), about which some discussions will be given later, furnish a classic example of this kind, coming Into and then out of periods of heightened interest. We devote the next two sections of this paper to a review of our work In magnetic acceleration of solids and of plasma compression. A final section gives a survey of our work In which thin foils are imploded to produce intense quantities of son x-rays. The authors are well aware of much excellent work done elsewhere In all of these topics, but partly because of space limitations, have confined this discussion to work done at Los Alamos.

Fowler, C.M.; Goforth, J.H.

1996-12-31

332

Epidemiology of Hairy Cell Leukemia in Los Angeles County1  

Microsoft Academic Search

The descriptive epidemiológica! characteristics of hairy cell leukemia (HCL), a rare chronic lymphoproliferative disorder, were examined by using incidence data collected from 1972 to 1987 by the Cancer Surveil lance Program, the population-based cancer registry for Los Angeles County. During the study period, 208 incident cases of historically confirmed HCL were diagnosed. HCL comprised 2% of all leukemias diagnosed in

Leslie Bernstein; Patricia Newton; Ronald K. Ross

333

Automated medical information system of the Los Alamos Scientific Laboratory  

SciTech Connect

The Medical Information System (MIS) at the Los Alamos Scientific Laboratory automates the acquisition, storage, and retrieval of medical information concerning the nine thousand project-connected personnel. The MIS incorporates an on-line, interactive medical history questionnaire, mark sense form processing, and automated coronary risk assesment in the medical evaluation process. Also, MIS has created the ability for long-term study and comparison of employee health as well as made the physician's time more effective.

Eagan, G.D.; Grier, R.S.

1980-01-01

334

ACCELERATION OF LOS ALAMOS NATIONAL LABORATORY TRANSURANIC WASTE DISPOSITION  

Microsoft Academic Search

One of Los Alamos National Laboratory's (LANL's) most significant risks is the site's inventory of transuranic waste retrievably stored above and below-ground in Technical Area (TA) 54 Area G, particularly the dispersible high-activity waste stored above-ground in deteriorating facilities. The high activity waste represents approximately 50% (by activity) of the total 292,000 PE-Ci inventory remaining to be disposed. The transuramic

GERALD A

2007-01-01

335

Acceleration of Los Alamos National Laboratory transuranic waste disposition  

Microsoft Academic Search

One of Los Alamos National Laboratory's (LANL's) most significant risks is the site's inventory of transuranic waste retrievably stored above and below-ground in Technical Area (TA) 54 Area G, particularly the dispersible high-activity waste stored above-ground in deteriorating facilities. The high activity waste represents approximately 50% (by activity) of the total 292,000 PE-Ci inventory remaining to be disposed. The transuranic

G. A. OLeary; B. A. Palmer; T. P. Starke; A. K. Phelps

2007-01-01

336

Neutron Capture Experiments Using the DANCE Array at Los Alamos  

Microsoft Academic Search

The Detector for Advanced Neutron Capture Experiments (DANCE) is designed for neutron capture measurements on very small and\\/or radioactive targets. The DANCE array of 160 BaF2 scintillation detectors is located at the Lujan Center at the Los Alamos Neutron Science Center (LANSCE). Accurate measurements of neutron capture data are important for many current applications as well as for basic understanding

D. Dashdorj; G. E. Mitchell; B. Baramsai; A. Chyzh; C. Walker; U. Agvaanluvsan; J. A. Becker; W. Parker; B. Sleaford; C. Y. Wu; T. A. Bredeweg; A. Couture; R. C. Haight; M. Jandel; R. S. Rundberg; J. L. Ullmann; D. J. Vieira; J. M. Wouters; F. Becvár

2009-01-01

337

Water supply at Los Alamos during 1996. Progress report  

SciTech Connect

Production of potable municipal water supplies during 1996 totaled about 1,368.1 million gallons from wells in the Guaje, Pajarito, and Otowi well fields. There was no water used from either the spring gallery in Water Canyon or from Guaje Reservoir during 1996. About 2.6 million gallons of water from Los Alamos Reservoir was used for lawn irrigation. The total water usage in 1996 was about 1,370.7 million gallons, or about 131 gallons per day per person living in Los Alamos County. Groundwater pumpage was up about 12.0 million gallons in 1996 compared with the pumpage in 1995. This report fulfills requirements specified in US Department of Energy (DOE) Order 5400.1 (Groundwater Protection Management Program), which requires the Los Alamos National Laboratory (LANL) to monitor and document groundwater conditions below Pajarito Plateau and to protect the regional aquifer from contamination associated with Laboratory operations. Furthermore, this report also fulfills special conditions by providing information on hydrologic characteristics of the regional aquifer, including operating conditions of the municipal water supply system.

McLin, S.G.; Purtymun, W.D.; Maes, M.N.; Longmire, P.A.

1997-12-01

338

Overview of laser technology at Los Alamos National Laboratory  

SciTech Connect

Los Alamos National Laboratory has had a long history of involvement in laser sciences and has been recognized both for its large laser programs and smaller scale developments in laser technology and applications. The first significant program was with the Rover nuclear-based rocket propulsion system in 1968 to study laser initiated fusion. From here applications spread to programs in laser isotope separation and development of large lasers for fusion. These programs established the technological human resource base of highly trained laser physicists, engineers, and chemists that remain at the Laboratory today. Almost every technical division at Los Alamos now has some laser capability ranging from laser development, applications, studies on nonlinear processes, modeling and materials processing. During the past six years over eight R&D-100 Awards have been received by Los Alamos for development of laser-based techniques and instrumentation. Outstanding examples of technology developed include LIDAR applications to environmental monitoring, single molecule detection using fluorescence spectroscopy, a laser-based high kinetic energy source of oxygen atoms produced by a laser-sustained plasma, laser-induced breakdown spectroscopy (LIBS) for compositional, analysis, thin film high temperature superconductor deposition, multi-station laser welding, and direct metal deposition and build-up of components by fusing powder particles with a laser beam.

Lewis, G.K.; Cremers, D.A.

1994-09-01

339

Los Alamos, Toshiba probing Fukushima with cosmic rays  

ScienceCinema

Los Alamos National Laboratory has announced an impending partnership with Toshiba Corporation to use a Los Alamos technique called muon tomography to safely peer inside the cores of the Fukushima Daiichi reactors and create high-resolution images of the damaged nuclear material inside without ever breaching the cores themselves. The initiative could reduce the time required to clean up the disabled complex by at least a decade and greatly reduce radiation exposure to personnel working at the plant. Muon radiography (also called cosmic-ray radiography) uses secondary particles generated when cosmic rays collide with upper regions of Earth's atmosphere to create images of the objects that the particles, called muons, penetrate. The process is analogous to an X-ray image, except muons are produced naturally and do not damage the materials they contact. Muon radiography has been used before in imaginative applications such as mapping the interior of the Great Pyramid at Giza, but Los Alamos's muon tomography technique represents a vast improvement over earlier technology.

Morris, Christopher

2014-06-25

340

Los Alamos Science: The Human Genome Project. Number 20, 1992  

SciTech Connect

This article provides a broad overview of the Human Genome Project, with particular emphasis on work being done at Los Alamos. It tries to emphasize the scientific aspects of the project, compared to the more speculative information presented in the popular press. There is a brief introduction to modern genetics, including a review of classic work. There is a broad overview of the Genome Project, describing what the project is, what are some of its major five-year goals, what are major technological challenges ahead of the project, and what can the field of biology, as well as society expect to see as benefits from this project. Specific results on the efforts directed at mapping chromosomes 16 and 5 are discussed. A brief introduction to DNA libraries is presented, bearing in mind that Los Alamos has housed such libraries for many years prior to the Genome Project. Information on efforts to do applied computational work related to the project are discussed, as well as experimental efforts to do rapid DNA sequencing by means of single-molecule detection using applied spectroscopic methods. The article introduces the Los Alamos staff which are working on the Genome Project, and concludes with brief discussions on ethical, legal, and social implications of this work; a brief glimpse of genetics as it may be practiced in the next century; and a glossary of relevant terms.

Cooper, N G; Shea, N [eds.

1992-01-01

341

Recent developments in the Los Alamos National Laboratory Plutonium Facility Waste Tracking System-automated data collection pilot project  

SciTech Connect

The waste management and environmental compliance group (NMT-7) at the Los Alamos National Laboratory has initiated a pilot project for demonstrating the feasibility and utility of automated data collection as a solution for tracking waste containers at the Los Alamos National Laboratory Plutonium Facility. This project, the Los Alamos Waste Tracking System (LAWTS), tracks waste containers during their lifecycle at the facility. LAWTS is a two-tiered system consisting of a server/workstation database and reporting engine and a hand-held data terminal-based client program for collecting data directly from tracked containers. New containers may be added to the system from either the client unit or from the server database. Once containers are in the system, they can be tracked through one of three primary transactions: Move, Inventory, and Shipment. Because LAWTS is a pilot project, it also serves as a learning experience for all parties involved. This paper will discuss many of the lessons learned in implementing a data collection system in the restricted environment. Specifically, the authors will discuss issues related to working with the PPT 4640 terminal system as the data collection unit. They will discuss problems with form factor (size, usability, etc.) as well as technical problems with wireless radio frequency functions. They will also discuss complications that arose from outdoor use of the terminal (barcode scanning failures, screen readability problems). The paper will conclude with a series of recommendations for proceeding with LAWTS based on experience to date.

Martinez, B.; Montoya, A.; Klein, W.

1999-02-01

342

El Proyecto Sismico "LARSE" - Trabajando Hacia un Futuro con Mas Seguridad para Los Angeles  

USGS Publications Warehouse

La region de Los Angeles contiene una red de fallas activas, incluyendo muchas fallas por empuje que son profundas y no rompen la superficie de la tierra. Estas fallas ocultas incluyen la falla anteriormente desconocida que fue responsable por la devastacion que ocurrio durante el terremoto de Northridge en enero de 1994, el terremoto mas costoso en la historia de los Estados Unidos. El Experimento Sismico en la Region de Los Angeles (Los Angeles Region Seismic Experiment, LARSE), esta localizando los peligros ocultos de los terremotos debajo de la region de Los Angeles para mejorar la construccion de las estructuras que pueden apoyar terremotos que son inevitables en el futuro, y que ayudaran a los cientificos determinar donde occurira el sacudimento mas fuerte y poderoso.

Henyey, Thomas L.; Fuis, Gary S.; Benthien, Mark L.; Burdette, Thomas R.; Christofferson, Shari A.; Clayton, Robert W.; Criley, Edward E.; Davis, Paul M.; Hendley, James W., II; Kohler, Monica D.; Lutter, William J.; McRaney, John K.; Murphy, Janice M.; Okaya, David A.; Ryberg, Trond; Simila, Gerald W.; Stauffer, Peter H.

1999-01-01

343

Alternative loading methods for Los Alamos stemming materials studies. Final report.  

National Technical Information Service (NTIS)

Since the MIGHTY OAK horizontal LOS event conducted in 1985, Los Alamos has placed stemming experiments in grout sections surrounding several DNA events. Stemming materials have been loaded into large drums to facilitate their recovery during mineback ope...

E. S. Gaffney

1991-01-01

344

Health Hazard Evaluation/Toxicity Determination. Continental Airlines, Los Angeles, California.  

National Technical Information Service (NTIS)

A health hazard survey was conducted by the National Institute for Occupational Safety and Health (NIOSH) to determine exposure to tobacco smoke at the Continental Airlines maintenance building, Los Angeles International Airport, Los Angeles, California. ...

M. T. Okawa

1972-01-01

345

Integer Factorization Using Hadoop  

Microsoft Academic Search

Integer factorization is an interesting but a hard problem and stays at the core of many security mechanisms. Conventional approaches to factor big integer numbers often require powerful computers and a great effort in software development. In this paper, we present a different approach to this problem by running the quadratic sieve algorithm in the Hadoop framework. This approach offers

Son T. Nguyen; Semere Tsehaye Ghebregiorgish; Nour Alabbasi; Chunming Rong

2011-01-01

346

Factors affecting tanker safety  

Microsoft Academic Search

The major factors influencing tanker safety are discussed. For the discussion information has been gleaned from maritime labour officials, industry experts and a recent United States Coast Guard study on tanker safety. Results of other tanker safety studies and\\/or accident reports are also utilized. Some of the factors analysed are the size and age of vessel, licence qualifications for mates

Craig J. Forsyth

1991-01-01

347

Overview of environmental factors  

NASA Technical Reports Server (NTRS)

The orbital environment is complex, dynamic, and comprised of both natural and system-induced components. Several environment factors are important for materials. Materials selection/suitability determination requires consideration of each and all factors, including synergisms among them. Understanding and evaluating these effects will require ground testing, modeling, and focused flight experimentation.

Purvis, C. K.

1989-01-01

348

EXPOSURE FACTORS PROGRAM  

EPA Science Inventory

The development of the latest version of the Exposure Factors Handbook (EFH): 2011 Edition (EPA/600/R-09/052F) has maintained the need for a more comprehensive program that addresses issues related to exposure factors. Since the first version of the EFH was r...

349

Lipooligosaccharide and Polysaccharide Capsule: Virulence Factors of Neisseria meningitidis That Determine Meningococcal Interaction with Human Dendritic Cells  

Microsoft Academic Search

In this work we analyzed the roles of meningococcal lipooligosaccharide (LOS) and capsule expression in the interaction of Neisseria meningitidis with human dendritic cells (DC). Infection of DC with serogroup B wild-type meningococci induced a strong burst of the proinflammatory cytokines and chemokines tumor necrosis factor alpha, interleukin-6 (IL-6), and IL-8. In contrast, a serogroup B mutant strain lacking LOS

Alexandra Unkmeir; Ulrike Kämmerer; Anne Stade; Claudia Hübner; Sabine Haller; Annette Kolb-Mäurer; Matthias Frosch; Guido Dietrich

2002-01-01

350

Medical service use among individuals receiving HIV prevention services in Los Angeles County.  

PubMed

Timely provision of medical services among communities at increased risk of HIV infection is crucial to detect the infection and to further prevent the spread of HIV. In the US, about one third of HIV cases were identified in the later stage of infection. The current study utilized the Gelberg-Andersen behavioral model for predicting medical service use among people who were at risk of HIV infection. The candidate variables included: social support, attitudinal, and behavioral variables. The data were collected from clients of HIV prevention agencies in Los Angeles County in 2004 who participated in the Countywide Risk Assessment Survey (CRAS). Using a logistic regression model, the study suggested that factors that were positively associated with use of medical services included living in a treatment center/halfway house or mission/shelter, experience of physical/sexual abuse, and ever receiving HIV testing/counseling. Factors inversely associated with medical service use were male gender, education, and consumption of alcohol. Analysis was conducted using SAS 9.3. Most of the findings are consistent with the Gelberg-Andersen model. The exception was that victims of physical or sexual abuse were more likely to use services instead of less likely as predicted by the model. PMID:24772692

Erlyana, Erlyana; Fisher, Dennis G; Reynolds, Grace L; Jansen, Michael

2014-01-01

351

Las unidades habitacionales y la vivienda en la ciudad de Morelia: apropiación de los espacios abiertos  

Microsoft Academic Search

La apropiación del espacio libre en las unidades habitacionales, genera conflicto y tensión social, por los habitantes- usuarios que crean y desarrollan una cultura urbana; expresada en sus vivencias, que van de lo individual a lo colectivo, de lo privado a lo público; haciendo de los espacios abiertos un lugar diferente. Los habitantes- usuarios buscan la identificación con su espacio,

Pedro Lina Manjares; Ana Rosa Velasco Ávalos

2007-01-01

352

Políticas de vivienda social en el Gran Santiago: proletarización de los sectores populares urbanos  

Microsoft Academic Search

La sumatoria de los procesos productivos, migraciones y pobreza que ha afectado a Santiago de Chile durante el siglo XX ha configurado un cuadro de déficit de viviendas entre los sectores populares como consecuencia del fuerte crecimiento poblacional, la falta de infraestructura urbana y la inestabilidad laboral de los sectores más desposeídos. Es en la segunda mitad del siglo citado

Rodrigo Rocha Pérez; Patricio Antilef Osorio; José Villarroel de la Sotta

2007-01-01

353

East Los Angeles College Community Demographics: A Look in 1980. Research Report 80-5.  

ERIC Educational Resources Information Center

A study was conducted by East Los Angeles College (ELAC) to determine the economic, demographic, and ethnic composition of ELAC's service district. The study involved the examination of community data collected from a variety of sources, including the Los Angeles County Regional Planning Department, the Los Angeles Times Marketing Research…

Hepburn, Kenneth; Sachs, Steven Mark

354

EL PARADIGMA DE LOS DELITOS DE TERRORISMO ENTRE DERECHO INTERNO Y DERECHO INTERNACIONAL  

Microsoft Academic Search

El artículo busca establecer un panorama entre los delitos de terrorismo desde su surgimiento hasta los días de hoy, teniendo en cuenta el desarrollo entre las aquí clasificadas fases evolutivas del fenómeno terrorista, llegando por fin a la última etapa, el terrorismo hoy que si conoce como, antes y después de los atentados de 11 de septiembre. Frente a esto

Ignácio Nunes Fernandes

2011-01-01

355

Los tratamientos psicológicos en la fobia social infantil y adolescente: una revisión cualitativa  

Microsoft Academic Search

Se presentan los resultados de un estudio cualitativo de revisión de la eficacia de los tratamientos psicológicos utilizados en la fobia social en niños y adolescentes. Se localizaron 26 investigaciones: 5 artículos son diseños de caso único, 6 presentan los datos de un solo grupo tratado y aportan medidas pretest-postest y 16 informes son grupos de comparación entre tratamientos psicológicos

Ana Isabel Rosa Alcázar; Pablo J. Olivares-Olivares; Marina Iniesta

2009-01-01

356

La regulación de los órganos de gobierno de las cajas de ahorros: consideraciones electorales  

Microsoft Academic Search

El presente trabajo supone un avance en la resolución de los problemas de elección social y reparto proporcional de las cajas de ahorros españolas. La regulación estatal y regional relativa a estas instituciones no resuelve adecuadamente los problemas en las elecciones a representantes a los órganos rectores de dichas entidades financieras. La elección de un método para un problema de

Santiago Carbó Valverde; Antonio Palomares Bautista; Victoriano Ramírez González

2004-01-01

357

Los Angeles is the Olympic City: Legacies of the 1932 and 1984 Olympic Games  

Microsoft Academic Search

In no other city but Los Angeles have the Olympics so completely shaped metropolitan identity – not even in modern Athens. Los Angeles used the 1932 games to put itself on the global map. The city used the 1984 games to redefine its image to the world. The Olympics helped Los Angeles to make itself the capital of the world's popular culture

Mark Dyreson; Matthew Llewellyn

2008-01-01

358

Indicadores de gestión urbana. Los observatorios urbano-territoriales para el desarrollo sostenible. Manizales, Colombia  

Microsoft Academic Search

Los Observatorios para el Desarrollo Sostenible del Municipio de Manizales en Colombia, hacen parte del Sistema de Monitoreo diseñado por el Municipio como apoyo a la gestión urbana local. A partir de los resultados de indicadores económicos, sociales y ambientales, los ciudadanos podrán evaluar de forma permanente el desempeño de programas y proyectos del Plan de Desarrollo Municipal y participar

Luz Stella Velásquez

2001-01-01

359

Los Alamos Scientific Laboratory energy-related history, research, managerial reorganization proposals, actions taken, and results. History report, 1945--1979  

Microsoft Academic Search

This report documents the development of major energy-related programs at the Los Alamos Scientific Laboratory between 1945 and 1979. Although the Laboratory`s primary mission during that era was the design and development of nuclear weapons and most of the Laboratory`s funding came from a single source, a number of factors were at work that led to the development of these

Hammel

1997-01-01

360

Risk Factors for Tuberculosis  

PubMed Central

The risk of progression from exposure to the tuberculosis bacilli to the development of active disease is a two-stage process governed by both exogenous and endogenous risk factors. Exogenous factors play a key role in accentuating the progression from exposure to infection among which the bacillary load in the sputum and the proximity of an individual to an infectious TB case are key factors. Similarly endogenous factors lead in progression from infection to active TB disease. Along with well-established risk factors (such as human immunodeficiency virus (HIV), malnutrition, and young age), emerging variables such as diabetes, indoor air pollution, alcohol, use of immunosuppressive drugs, and tobacco smoke play a significant role at both the individual and population level. Socioeconomic and behavioral factors are also shown to increase the susceptibility to infection. Specific groups such as health care workers and indigenous population are also at an increased risk of TB infection and disease. This paper summarizes these factors along with health system issues such as the effects of delay in diagnosis of TB in the transmission of the bacilli.

Narasimhan, Padmanesan; Wood, James; MacIntyre, Chandini Raina; Mathai, Dilip

2013-01-01

361

Environmental factors in autism.  

PubMed

Autism is a neurodevelopmental disorders characterized by impairments in communication and social behavior, and by repetitive behaviors. Although genetic factors might be largely responsible for the occurrence of autism they cannot fully account for all cases and it is likely that in addition to a certain combination of autism-related genes, specific environmental factors might act as risk factors triggering the development of autism. Thus, the role of environmental factors in autism is an important area of research and recent data will be discussed in this review. Interestingly, the results show that many environmental risk factors are interrelated and their identification and comparison might unveil a common scheme of alterations on a contextual as well as molecular level. For example, both, disruption in the immune system and in zinc homeostasis may affect synaptic transmission in autism. Thus, here, a model is proposed that interconnects the most important and scientifically recognized environmental factors. Moreover, similarities in how these risk factors impact synapse function are discussed and a possible influence on an already well described genetic pathway leading to the development of autism via zinc homeostasis is proposed. PMID:23346059

Grabrucker, Andreas M

2012-01-01

362

Percepción de los Clientes Bancarios sobre las Acciones de Recuperación del Servicio en Chile Perception of the Retail Banking Customers Regarding the Service Recovery Efforts in Chile  

Microsoft Academic Search

RESUMEN. El artículo valida, desde el punto de vista de los clientes bancarios, seis acciones que los bancos deberían tomar para manejar los reclamos de los clientes. Ellas son la corrección de los errores, la indemnización, la atención a los consumidores, el tiempo que se demoran los bancos en dar una respuesta al reclamo y el tiempo y esfuerzo que

2008-01-01

363

Conundrums with uncertainty factors.  

PubMed

The practice of uncertainty factors as applied to noncancer endpoints in the IRIS database harkens back to traditional safety factors. In the era before risk quantification, these were used to build in a "margin of safety." As risk quantification takes hold, the safety factor methods yield to quantitative risk calculations to guarantee safety. Many authors believe that uncertainty factors can be given a probabilistic interpretation as ratios of response rates, and that the reference values computed according to the IRIS methodology can thus be converted to random variables whose distributions can be computed with Monte Carlo methods, based on the distributions of the uncertainty factors. Recent proposals from the National Research Council echo this view. Based on probabilistic arguments, several authors claim that the current practice of uncertainty factors is overprotective. When interpreted probabilistically, uncertainty factors entail very strong assumptions on the underlying response rates. For example, the factor for extrapolating from animal to human is the same whether the dosage is chronic or subchronic. Together with independence assumptions, these assumptions entail that the covariance matrix of the logged response rates is singular. In other words, the accumulated assumptions entail a log-linear dependence between the response rates. This in turn means that any uncertainty analysis based on these assumptions is ill-conditioned; it effectively computes uncertainty conditional on a set of zero probability. The practice of uncertainty factors is due for a thorough review. Two directions are briefly sketched, one based on standard regression models, and one based on nonparametric continuous Bayesian belief nets. PMID:20030767

Cooke, Roger

2010-03-01

364

Factorizations in finite groups  

SciTech Connect

A necessary condition for uniqueness of factorizations of elements of a finite group G with factors belonging to a union of some conjugacy classes of G is given. This condition is sufficient if the number of factors belonging to each conjugacy class is big enough. The result is applied to the problem on the number of irreducible components of the Hurwitz space of degree d marked coverings of P{sup 1} with given Galois group G and fixed collection of local monodromies. Bibliography: 9 titles.

Kulikov, Viktor S [Steklov Mathematical Institute, Russian Academy of Sciences, Moscow (Russian Federation)] [Steklov Mathematical Institute, Russian Academy of Sciences, Moscow (Russian Federation)

2013-02-28

365

Interseismic Strain Accumulation Across Metropolitan Los Angeles: Puente Hills Thrust  

NASA Astrophysics Data System (ADS)

Twelve years of observation of the Southern California Integrated GPS Network (SCIGN) are tightly constraining the distribution of shortening across metropolitan Los Angeles, providing information on strain accumulation across blind thrust faults. Synthetic Aperture Radar Interferometry (InSAR) and water well records are allowing the effects of water and oil management to be distinguished. The Mojave segment of the San Andreas fault is at a 25° angle to Pacific-North America plate motion. GPS shows that NNE-SSW shortening due to this big restraining bend is fastest not immediately south of the San Andreas fault across the San Gabriel mountains, but rather 50 km south of the fault in northern metropolitan Los Angeles. The GPS results we quote next are for a NNE profile through downtown Los Angeles. Just 2 mm/yr of shortening is being taken up across the San Gabriel mountains, 40 km wide (0.05 micro strain/yr); 4 mm/yr of shortening is being taken up between the Sierra Madre fault, at the southern front of the San Gabriel mountains, and South Central Los Angeles, also 40 km wide (0.10 micro strain/yr). We find shortening to be more evenly distributed across metropolitan Los Angeles than we found before [Argus et al. 2005], though within the 95% confidence limits. An elastic models of interseismic strain accumulation is fit to the GPS observations using the Back Slip model of Savage [1983]. Rheology differences between crystalline basement and sedimentary basin rocks are incorporated using the EDGRN/EDCMP algorithm of Wang et al. [2003]. We attempt to place the Back Slip model into the context of the Elastic Subducting Plate Model of Kanda and Simons [2010]. We find, along the NNE profile through downtown, that: (1) The deep Sierra Madre Thrust cannot be slipping faster than 2 mm/yr, and (2) The Puente Hills Thrust and nearby thrust faults (such as the upper Elysian Park Thrust) are slipping at 9 ±2 mm/yr beneath a locking depth of 12 ±5 km (95% confidence limits). Incorporating sedimentary basin rock either reduces the slip rate by 10 per cent or increases the locking rate by 20 per cent. The 9 mm/yr rate for the Puente Hills Thrust and nearby faults exceeds the cumulative 3-5 mm/yr rate estimated using paleoseismology along the Puente Hills Thrust (1.2-1.6 mm/yr, Dolan et al. 2003), upper Elysian Park Thrust (0.6-2.2 mm/yr, Oskin et al. 2000), and western Compton Thrust (1.2 mm/yr, Leon et al. 2009], though all the paleoseismic estimates are minimums. We infer that M 7 earthquakes in northern metropolitan Los Angeles may occur more frequently that previously thought.

Argus, D.; Liu, Z.; Heflin, M. B.; Moore, A. W.; Owen, S. E.; Lundgren, P.; Drake, V. G.; Rodriguez, I. I.

2012-12-01

366

Correlates of perceived risk of developing cancer among African-Americans in South Los Angeles.  

PubMed

There are differences in cancer-risk perception among racial/ethnic groups that may affect health risk behaviors. Using a community partnered-participatory research approach, we conducted a survey on cancer screening, risk behaviors, and related knowledge/attitudes within 11 churches in South Los Angeles with predominantly African-American parishioners. This analysis examines correlates of perceived risk of developing cancer among 755 African American adults. Almost 15 % of participants indicated higher perceived risk for cancer compared to the average man/woman of the same age, 38 % indicated same risk, whereas 48 % perceived lower risk. Sixty-nine individuals (9 %) reported a cancer history and 63 % reported at least one blood relative with cancer. Controlling for demographic characteristics and healthcare access, participants who reported higher risk of cancer had higher level of cancer-related knowledge; were current and ex-smokers; had poorer health status; had a blood relative with cancer; had a cancer history; and had discussed their risk of cancer with their doctor. The bivariate association between high perceived cancer risk and lack of exercise and obesity disappeared after adjusting for demographic characteristics and perceived health status. Our data suggest that a substantial proportion of African Americans in South Los Angeles may underestimate their cancer risk. Additionally, lack of exercise and obesity are not recognized as independent cancer risk factors as much as smoking and personal and family history of cancer. Next steps will be to inform participating churches about our findings and explore their interest in taking steps to reduce health risk behaviors among their parishioners. PMID:24026303

Lucas-Wright, Anna; Bazargan, Mohsen; Jones, Loretta; Vadgama, Jaydutt V; Vargas, Roberto; Sarkissyan, Marianna; Smith, James; Yazdanshenas, Hamed; Maxwell, Annette E

2014-02-01

367

Characteristic roofing slates from Spain: Mormeau and Los Molinos  

NASA Astrophysics Data System (ADS)

Characteristic roofing slates from Spain: Mormeau and Los Molinos Cardenes1, V., Cnudde1, V., Cnudde1, J.P. 1 Department of Geology and Soil Science, Ghent University, Krijgslaan 281, S8, 9000 Ghent, Belgium. The world's major roofing slate outcrops are found in the NW of Spain, in the Ordovician terrains of the domain of the Truchas Syncline. In this remote area, slate was quarried since ancient times for the use of the inhabitants of the region. Half of a century ago, an industrialization process took place in this area, which began to produce high quality roofing slate for many buildings from Japan to the USA, and especially in Europe. Since then, Spanish slate roofing has been widely used for new buildings and also for restoration of historical buildings. This work revises the occurrence and characteristics of the two most representative grey slate varieties from the Truchas Syncline, Mormeau, a fine-grained slate, and Los Molinos, also a grey slate with a slightly coarser grain. Both slates have a very similar aspect, but Mormeau slate have some iron sulphides on its composition that sometimes forms oxidation spots. Mormeau beds are found at the Middle-Upper Ordovician age Casaio Formation, while Los Molinos beds are located at the Rozadais Formation, of age Upper Ordovician, defined as formation just for the Truchas Syncline domain. Both slates have a high degree of homogeneity on their constructive characteristics, with a typical composition of quartz, mica and chlorites, and a metamorphic degree corresponding to the green schists facies. This work revises the history and characteristics of both slates, that can be considered as lithotypes that can be used as a reference during the prospection of new slate outcrops worldwide. The presented varieties of slate are proposed for their inclusion as Global Heritage Stones.

Cardenes Van den Eynde, Victor; Cnudde, Veerle; Cnudde, Jean Pierre

2014-05-01

368

Ensuring Conservatism\\/Lessons Learned in Leak Path Factor Calculations with MELCOR  

Microsoft Academic Search

This paper consists of two parts. The first part discusses the steps taken to ensure that leak path factors (LPFs) calculated using the MELCOR computer code for the Los Alamos National Laboratory (LANL) Plutonium Facility Documented Safety Analysis (DSA) are conservative. The second part consists of a statistical analysis of the results from the large number of MELCOR runs performed,

Donald A. Siebe; Patrick R. McClure; Bruce C. Letellier

369

Factors Affecting Length of Stay on Maximum Security in a Forensic Psychiatric Hospital  

Microsoft Academic Search

Forensic hospitals are responsible for both the custody and treatment of patients, including treatment that will minimize the risk of future violence to the community. This study examined factors that affected length of stay (LOS) in Maryland’s only maximum-security forensic hospital for mentally ill patients who were adjudicated not criminally responsible (NCR) for serious violent crimes. The current study focused

Marianne J. Moran; M. Richard Fragala; Beverly F. Wise; Tammy Lynn Novak

1999-01-01

370

Birth weight and other prenatal factors and risk of breast cancer in Asian-Americans  

Microsoft Academic Search

Little is known about the role of birth weight and other prenatal factors in the etiology of breast cancer in Asian-Americans.\\u000a We investigated the relation between birth weight and other prenatal factors and breast cancer risk in a population-based\\u000a case–control study in Los Angeles County that included 2,259 Asian-American women with incident, histologically confirmed\\u000a breast cancer and 2,019 control women,

Anna H. WuRoberta; Roberta McKean-Cowdin; Chiu-Chen Tseng

371

Superconducting RF Lab Facility Upgrades at Los Alamos  

SciTech Connect

Research and testing of multi-cell superconducting cavities demands extensive contamination control resources to achieve high-cavity fields. Facility upgrades at Los Alamos National Laboratory (LANL) included the modernization of test equipment, expanding and modernizing cleanroom facilities, improving safety, and expanding the high-pressure rinse cleaning process equipment. Each upgrade was integrated into the facility to enable users to assemble prototype cryomodules. The scope of the upgrades, the new installed capability, and budget and schedule for certain aspects of the project are discussed in this paper.

Katonak, D.J.; Rusnak, B.

1999-03-01

372

Text and graphics at Los Alamos: a system viewpoint  

SciTech Connect

At Los Alamos National Laboratory, a computerized document preparation system is being developed to produce publication-quality documents integrating text and graphics. Mixing text and graphics involves a combination of two different technologies; thus the project has presented numerous and interesting challenges. The requirements, issues, solutions, and continuing concerns of the system development are described. The particular challenges encountered in fitting the document system into the Laboratory's diverse computing network are explained. The paper itself is an example of the type of document the system can produce. 3 figs.

Vigil, M.; Bouchier, S.C.

1986-01-01

373

The Los Alamos VXI-based modular RF control system  

SciTech Connect

This paper describes the design and implementation of the Los Alamos modular RF control system, which provides high-performance feedback and/or feedforward control of RF accelerator cavities. This is a flexible, modular control system which has been realized in the industry-standard VXI cardmodular format. A wide spectrum of system functionality can be accommodated simply by incorporating only those modules and features required for a particular application. The fundamental principles of the design approach are discussed. Details of the VXI implementation are given, including the system architecture and interfaces, performance capabilities, and available features.

Jachim, S.P.; Ziomek, C.; Natter, E.F.; Regan, A.H.; Hill, J.; Eaton, L.; Gutscher, W.D.; Curtin, M.; Denney, P.; Hansberry, E.; Brooks, T.

1993-01-01

374

The Los Alamos VXI-based modular RF control system  

SciTech Connect

This paper describes the design and implementation of the Los Alamos modular RF control system, which provides high-performance feedback and/or feedforward control of RF accelerator cavities. This is a flexible, modular control system which has been realized in the industry-standard VXI cardmodular format. A wide spectrum of system functionality can be accommodated simply by incorporating only those modules and features required for a particular application. The fundamental principles of the design approach are discussed. Details of the VXI implementation are given, including the system architecture and interfaces, performance capabilities, and available features.

Jachim, S.P.; Ziomek, C.; Natter, E.F.; Regan, A.H.; Hill, J.; Eaton, L.; Gutscher, W.D.; Curtin, M.; Denney, P.; Hansberry, E.; Brooks, T.

1993-06-01

375

Los Alamos Science, Number 25 -- 1997: Celebrating the neutrino  

SciTech Connect

This issue is devoted to the neutrino and its remaining mysteries. It is divided into the following areas: (1) The Reines-Cowan experiment -- detecting the poltergeist; (2) The oscillating neutrino -- an introduction to neutrino masses and mixing; (3) A brief history of neutrino experiments at LAMPF; (4) A thousand eyes -- the story of LSND (Los Alamos neutrino oscillation experiment); (5) The evidence for oscillations; (6) The nature of neutrinos in muon decay and physics beyond the Standard Model; (7) Exorcising ghosts -- in pursuit of the missing solar neutrinos; (8) MSW -- a possible solution to the solar neutrino problem; (8) Neutrinos and supernovae; and (9) Dark matter and massive neutrinos.

Cooper, N.G. [ed.] [ed.

1997-12-31

376

Waste minimization in the Los Alamos Medical Radioisotope Program  

SciTech Connect

Since the mid-1970s the Los Alamos Medical Radioisotope Program has been irradiating target materials to produce and recover radioisotopes for applications in medicine, environmental science, biology, physics, materials research, and other disciplines where radiotracers find utility. By necessity, the chemical processing of targets and the isolation of radioisotopes generates radioactive waste materials. Recent years have brought pressure to discontinue the use of hazardous materials and to minimize radioactive waste volumes. Substantial waste reduction measures have been introduced at the irradiation facility, in processing approaches, and even in the ways the product isotopes are supplied to users.

Taylor, W.A.; Jamriska, D.J.; Hamilton, V.T.; Heaton, R.C.; Phillips, D.R.; Staroski, R.C.; Garcia, J.B.; Garcia, J.G.; Ott, M.A.

1994-04-01

377

Precision electroweak physics with neutrinos at Los Alamos  

SciTech Connect

We review the status of current efforts at Los Alamos to measure the mass of /bar /nu///sub e/ with tritium beta decay and to search for oscillation of /bar /nu///sub ..mu../ to /bar /nu///sub e/. A new proposal to carry out a precision measurement of the electroweak mixing angle, theta/sub W/, using neutrino-electron scattering measured in a 7000-ton water /hacek C/erenkov detector, the Large /hacek C/erenkov Detector (LCD), is described. 17 refs., 6 figs., 1 tab.

Sanders, G.H.

1989-01-01

378

Plans for a new pulsed spallation source at Los Alamos  

SciTech Connect

Los Alamos National Laboratory has proposed to change the emphasis of research at its Meson Physics Facility (LAWF) by buabg a new pulsed spallation source for neutron scattering research. The new source would have a beam power of about one megawatt shared between two neutron production targets, one operating at 20 Hz and the other at 40 Hz. It would make use of much of the existing proton linac and would be designed to accommodate a later upgrade to a beam power of 5 MW or so. A study of technical feasibility is underway and will be published later this year.

Pynn, R.

1993-06-01

379

Water supply at Los Alamos during 1995. Progress report  

SciTech Connect

Production of potable municipal water supplies during 1995 totaled about 1,356.1 million gallons from wells in the Guaje and Pajarito well fields. Wells in the Otowi field were not operational during 1995. The nonpotable water supply for industrial use was about 1.6 million gallons from the spring gallery in Water Canyon, and another 1.6 million gallons from Los Alamos Reservoir was used for lawn irrigation. There was no water used from Guaje Reservoir in 1995. The total water usage in 1995 was about 1,359.3 million gallons. Groundwater pumpage during 1995 was the lowest on record since 1966.

McLin, S.G.; Purtymun, W.D.; Maes, M.N.

1997-04-01

380

NUCLEAR SECURITY: Los Alamos Under Siege After Secrets Recovered.  

PubMed

The secrets-packed computer hard drives that temporarily disappeared at the Los Alamos National Laboratory in New Mexico could spark big changes in science and security at the country's nuclear weapons laboratories. As Science went to press, investigators were trying to determine if the disks--missing from a vault since at least 7 May and discovered behind a nearby copying machine on 16 June--were pocketed by spies or just mislaid by employees. Their disappearance touched off a debate about how useful they might be to a rogue nation or terrorist group. PMID:17758894

Malakoff, D

2000-06-23

381

Comparación entre los sitios de LLAMA y APEX  

NASA Astrophysics Data System (ADS)

A comparison among the meteorological condition prevailing at the location of APEX (Atacama Pathfinder Experiment) telescope and the site selected to deploy LLAMA (Long Latin American Millimeter Array) is carried out. The later is dubbed Alto Chorrillo, and is located 4800 m above sea level and around 16 km eastward from the town of San Antonio de los Cobres (province of Salta). This work is part of a long term monitoring campaign aim at selecting sites for millimeter and submillimeter radioastronomy that is being carried out by the Instituto Argentino de Radioastronomía (IAR) since 2002. FULL TEXT IN SPANISH

Bareilles, F. A.; Morras, R.; Hauscarriaga, F. P.; Guarrera, L.; Arnal, E. M.; Lepine, J. R. D.

382

Mac configuration management at the Los Alamos National Laboratory  

SciTech Connect

The Los Alamos National Laboratory (LANL) had a need for central configuration management of non-Windows computers. LANL has three to five thousand Macs and an equal number of Linux based systems. The primary goal was to be able to inventory all non-windows systems and patch Mc OS X systems. LANL examined a number of commercial and open source solutions and ultimately selected Puppet. This paper will discuss why we chose Puppet, how we implemented it, and some lessons we learned along the way.

Marcus, Allan B [Los Alamos National Laboratory

2010-01-01

383

Status of the Los Alamos tritium beta decay experiment  

NASA Astrophysics Data System (ADS)

The Los Alamos tritium experiment employs a gaseous tritium source and a magnetic spectrometer to determine the mass of the electron antineutrino from the shape of the tritium beta spectrum. Since publication of the first result from this apparatus (m ? < 27 eV at 95% confidence), work has concentrated on improving the data rates. A 96-element Si microstrip array detector has been installed to replace the single proportional counter at the spectrometer focus, resulting in greatly increased efficiency. Measurements of the 1s photoionization spectrum of Kr now obviate the need for reliance on the theoretical shakeup and shakeoff spectrum of Kr in determining the spectrometer resolution.

Bowles, T. J.; Robertson, R. G. H.; Wark, D. L.; Wilkerson, J. F.; Knapp, D. A.

1990-02-01

384

Groundwater level status report for 2010, Los Alamos National Laboratory  

SciTech Connect

The status of groundwater level monitoring at Los Alamos National Laboratory in 2010 is provided in this report. This report summarizes groundwater level data for 194 monitoring wells, including 63 regional aquifer wells (including 10 regional/intermediate wells), 34 intermediate wells, 97 alluvial wells, and 12 water supply wells. Pressure transducers were installed in 162 monitoring wells for continuous monitoring of groundwater levels. Time-series hydrographs of groundwater level data are presented along with pertinent construction and location information for each well. The report also summarizes the groundwater temperatures recorded in intermediate and regional aquifer monitoring wells and seasonal responses to snowmelt runoff observed in intermediate wells.

Koch, Richard J.; Schmeer, Sarah

2011-03-01

385

Groundwater level status report for 2009, Los Alamos National Laboratory  

SciTech Connect

The status of groundwater level monitoring at Los Alamos National Laboratory in 2009 is provided in this report. This report summarizes groundwater level data for 179 monitoring wells, including 55 regional aquifer wells (including 11 regional/intermediate wells), 26 intermediate wells, 98 alluvial wells, and 12 water supply wells. Pressure transducers were installed in 161 monitoring wells for continuous monitoring of groundwater levels. Time-series hydrographs of groundwater level data are presented along with pertinent construction and location information for each well. The report also summarizes the groundwater temperatures recorded in intermediate and regional aquifer monitoring wells.

Koch, Richard J.; Schmeer, Sarah

2010-03-01

386

Tiger Team Assessment of the Los Alamos National Laboratory  

SciTech Connect

The purpose of the safety and health assessment was to determine the effectiveness of representative safety and health programs at the Los Alamos National Laboratory (LANL). Within the safety and health programs at LANL, performance was assessed in the following technical areas: Organization and Administration, Quality Verification, Operations, Maintenance, Training and Certification, Auxiliary Systems, Emergency Preparedness, Technical Support, Packaging and Transportation, Nuclear Criticality Safety, Security/Safety Interface, Experimental Activities, Site/Facility Safety Review, Radiological Protection, Personnel Protection, Worker Safety and Health (OSHA) Compliance, Fire Protection, Aviation Safety, Explosives Safety, Natural Phenomena, and Medical Services.

Not Available

1991-11-01

387

Laser protective eyewear program at the Los Alamos Scientific Laboratory  

SciTech Connect

The proliferation of lasers at Los Alamos focused considerable attention on providing adequate eye protection for experimenters involved in the use of a wide variety of nonionizing radiation. Experiments with fast-pulsed lasers (Nd:YAG, HF, and CO/sub 2/) were performed to gain biological threshold data on ocular damage. In parallel, eye protection devices were evaluated, which resulted in the development of lightweight, comfortable spectacles of colored glass filters that can be ground to prescription specifications. Goggle styles are employed in specific applications.

Winburn, D.C.

1980-01-01

388

Risk Factors of Cholangiocarcinoma  

PubMed Central

Cholangiocarcinoma is the second most common primary hepatic malignancy after hepatocellular cancer. It accounts for approximately 10–25% of all hepatobiliary malignancies. There are considerable geographic and demographic variations in the incidence of cholangiocarcinoma. There are several established risk factors for CC including parasitic infections, primary sclerosing cholangitis, biliary-duct cysts, hepatolithiasis, and toxins. Other less-established, potential risk factors include inflammatory bowel disease, hepatitis C virus, hepatitis B virus, cirrhosis, diabetes, obesity, alcohol drinking, tobacco smoking, and host genetic polymorphisms. In studies where the distinction between ICC and ECC was used, some potential risk factors seem to have differential effect on CC depending on site. Therefore, the consistent use of more refined classification would allow better understanding of risk factors for cholangiocarcinoma.

Tyson, Gia L.; El-Serag, Hashem B.

2011-01-01

389

Angiogenic Factors and Preeclampsia  

PubMed Central

Summary Preeclampsia, a hypertensive disorder peculiar to pregnancy, is a systemic syndrome that appears to originate in the placenta and is characterized by widespread maternal endothelial dysfunction. Until recently, the molecular pathogenesis of phenotypic preeclampsia was largely unknown, but recent observations support the hypothesis that altered expression of placental anti-angiogenic factors are responsible for the clinical manifestation of the disease. Soluble Flt1 and soluble endoglin, secreted by the placenta, are increased in the maternal circulation weeks before the onset of preeclampsia. These anti-angiogenic factors produce systemic endothelial dysfunction, resulting in hypertension, proteinuria, and the other systemic manifestations of preeclampsia. The molecular basis for placental dysregulation of these pathogenic factors remains unknown, and as of 2010 the role of angiogenic proteins in early placental vascular development was starting to be explored. The data linking angiogenic factors to preeclampsia have exciting clinical implications, and likely will transform the detection and treatment of preeclampsia.

Maynard, Sharon E.; Karumanchi, S. Ananth

2011-01-01

390

Factors Affecting Coding Errors.  

National Technical Information Service (NTIS)

This Memorandum describes experiments which sought to identify the factors that contribute to coding errors. The experiments used code-stimulus materials: numeric codes, consisting only of numbers; alpha codes, consisting only of letters; alpha-numeric co...

S. Owsowtiz, A. Sweetland

1965-01-01

391

Israelachvili Packing factor  

NSDL National Science Digital Library

Israelachvili Packing factor. The geometry of associated structures depends upon "packing" properties of the molecule: the optimal area of the head group, a0, volume of the chain, V, and the critical length of the tether, lc.

Iacovella, Christopher R.

2006-08-02

392

Factor II deficiency  

MedlinePLUS

... loss by getting infusions of fresh or frozen plasma or concentrates of clotting factors into the blood. ... Shattil SJ, et al, eds. Hoffman Hematology: Basic Principles and Practice. 5th ed. Philadelphia, Pa: Churchill Livingstone ...

393

Diverging Fano factors  

NASA Astrophysics Data System (ADS)

We illustrate, with reference to the so-called Fano factor, that dramatic differences between the two most popular phase-space distributions (Wigner's and Husimi's) become evident at the level of the harmonic oscillator treatment.

Pennini, F.; Plastino, A.

2010-09-01

394

Overhaul Factor Forecasting.  

National Technical Information Service (NTIS)

Results from a study of techniques for forecasting overhaul factors are reported. Techniques evaluated include cumulative history, moving average, and single and adaptive exponential smoothing. A modified version of the exponential smoothing technique pro...

P. R. Fatianow

1975-01-01

395

Aerospace Human Factors  

NASA Technical Reports Server (NTRS)

The following contains the final report on the activities related to the Cooperative Agreement between the human factors research group at NASA Ames Research Center and the Psychology Department at San Jose State University. The participating NASA Ames division has been, as the organization has changed, the Aerospace Human Factors Research Division (ASHFRD and Code FL), the Flight Management and Human Factors Research Division (Code AF), and the Human Factors Research and Technology Division (Code IH). The inclusive dates for the report are November 1, 1984 to January 31, 1999. Throughout the years, approximately 170 persons worked on the cooperative agreements in one capacity or another. The Cooperative Agreement provided for research personnel to collaborate with senior scientists in ongoing NASA ARC research. Finally, many post-MA/MS and post-doctoral personnel contributed to the projects. It is worth noting that 10 former cooperative agreement personnel were hired into civil service positions directly from the agreements.

Jordan, Kevin

1999-01-01

396

Factors Affecting Wound Healing  

PubMed Central

Wound healing, as a normal biological process in the human body, is achieved through four precisely and highly programmed phases: hemostasis, inflammation, proliferation, and remodeling. For a wound to heal successfully, all four phases must occur in the proper sequence and time frame. Many factors can interfere with one or more phases of this process, thus causing improper or impaired wound healing. This article reviews the recent literature on the most significant factors that affect cutaneous wound healing and the potential cellular and/or molecular mechanisms involved. The factors discussed include oxygenation, infection, age and sex hormones, stress, diabetes, obesity, medications, alcoholism, smoking, and nutrition. A better understanding of the influence of these factors on repair may lead to therapeutics that improve wound healing and resolve impaired wounds.

Guo, S.; DiPietro, L.A.

2010-01-01

397

Commercialization of Los Alamos National Laboratory technologies via small businesses. Final report  

SciTech Connect

Appendices are presented from a study performed on a concept model system for the commercialization of Los Alamos National Laboratory technologies via small businesses. Topics include a summary of information from the joint MCC/Los Alamos technology conference; a comparison of New Mexico infrastructure to other areas; a typical licensing agreement; technology screening guides; summaries of specific DOE/UC/Los Alamos documents; a bibliography; the Oak Ridge National Laboratory TCRD; The Ames Center for Advanced Technology Development; Los Alamos licensing procedures; presentation of slides from monthly MCC/Los Alamos review meetings; generalized entrepreneurship model; and a discussion on receiving equity for technology.

Brice, R.; Carton, D.; Rhyne, T. [and others] [and others

1997-06-01

398

Factoring by Electronic Mail  

Microsoft Academic Search

In this paper we describe our distributed implementation of two factoring algorithms, the elliptic curve method (ecm) and\\u000a the multiple polynomial quadratic sieve algorithm (mpqs).\\u000a \\u000a Since the summer of 1987, our ecm-implementation on a network of MicroVAX processors at DEC’s Systems Research Center has\\u000a factored several most and more wanted numbers from the Cunningham project. In the summer of 1988,

Arjen K. Lenstra; Mark S. Manasse

1989-01-01

399

Health factors in colostrum  

Microsoft Academic Search

Colostrum is a breast milk produced after the birth of the newborn and lasts for 2–4 days. Colostrum is very important part\\u000a of breast milk and lays down the immune system and confers growth factors and other protective factors for the young ones\\u000a in mammals. This is the source of passive immunity achieved by the mother and is transferred to

B. R. Thapa

2005-01-01

400

Limiting Factors in Ecosystems  

NSDL National Science Digital Library

This unit, designed to span two class periods, helps students understand that physical factors, particularly temperature and precipitation, limit the growth of plant ecosystems. The activity begins with a discussion in which students develop their own ideas about the role of temperature, precipitation, and environment on plant growth. They will then examine X-Y graphs of vegetation growth, temperature, and precipitation versus month for four diverse ecosystems to determine which climatic factor is limiting growth. A worksheet and scoring rubric are provided.

401

Phase unwrapping by factorization  

Microsoft Academic Search

An algorithm for the numerical factorization of very high degree but well-conditioned polynomials is developed. This is used to factor the z-transform of finite-length signals, and the zeros are used to calculate the unwrapped phase. The method has been tested on signals up to 512 points in length. A complete Fortran 77 program is given for the case of a

KENNETH STEIGLITZ; BRADLEY DICKINSON

1982-01-01

402

The von Willebrand factor  

Microsoft Academic Search

Summary  Von Willebrand factor (vWf) is a multimeric and multivalent adhesive protein which is essential for platelet adhesion to subendothelium\\u000a and for stabilization of factor VIII procoagulant activity in circulation. The quantitative measurement of vWf involves essentially\\u000a two different approaches. The first is based on the interaction between vWf and Gp Ib of the platelet membrane in presence\\u000a of ristocetin (ristocetin

Francesco Rodeghiero; Giancarlo Castaman

1990-01-01

403

FGF growth factor analogs  

DOEpatents

The present invention provides a fibroblast growth factor heparin-binding analog of the formula: ##STR00001## where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, X, Y and Z are as defined, pharmaceutical compositions, coating compositions and medical devices including the fibroblast growth factor heparin-binding analog of the foregoing formula, and methods and uses thereof.

Zamora, Paul O. (Gaithersburg, MD); Pena, Louis A. (Poquott, NY); Lin, Xinhua (Plainview, NY); Takahashi, Kazuyuki (Germantown, MD)

2012-07-24

404

Hematopoietic growth factors.  

PubMed

Hematopoiesis is a complex process that underlines the production of multiple highly specialized cells. The intricate mechanisms involved in this process include both positive and negative feedback by humoral activities, pluripotent stem cell selfrenewal and differentiation, and local interactions between stromal components of the hematopoietic microenvironment and various stem and progenitor cells. A group of hematopoietic growth factors, as well as their genes and chromosomal locations, have been identified. Advances in biochemistry and molecular biology led to the purification, genetic sequencing and molecular cloning of these glycoproteins. They include interleukin-3 (IL-3), granulocyte colony-stimulating factor (G-CSF), granulocyte-macrophage colony-stimulating factor (GM-CSF), macrophage colony-stimulating factor (M-CSF) and erythropoietin (EPO). The biologic specificity of these substances is defined by their ability to support proliferation and differentiation of hematopoietic cells in a semisolid clonal assay system. These factors share certain characteristics, including their ability to stimulate the function of mature cells, their overlapping activity affecting progenitor cells of several lineages, and their direct and indirect actions on nonhematopoietic cells. Trials using hematopoietic growth factors demonstrated their remarkable efficacy in a variety of clinical settings. PMID:1708221

Tabbara, I A; Robinson, B E

1991-01-01

405

Compilted Quantum Factoring Circuits  

NASA Astrophysics Data System (ADS)

Shor's factoring algorithm is held as one of the most promising and useful applications of quantum computing. It allows one to factor large numbers in polynomial time, undermining the most common cryptographic schemes in use today, such as RSA cryptography. The well known algorithm is based on the quantum fourier transform to find the period of a function, and also makes heavy use of the modular exponentiation operation, given by, U:a0 ->ax^a(mod N), where N is the number to be factored, and x is a random positive integer coprime with N. The modular exponentiation is the bottleneck of the algorithm, the portion that uses the most time. The generic algorithm can factorize any N in time order (N)^3, assuming sufficient memory space for intermediate calculations. Reducing the memory available (as long as it still lies above a certain threshold) increases the time taken by multiplicative factors, keeping its order the same in (N). However, for a given N, or class of N's to factorize, the generic algorithm may be suboptimal, and can be optimized to result in substantial savings in both memory needed and operation time. The different suboperations involved in modular exponentiat

Gamel, Omar; James, Daniel

2013-03-01

406

EFECTO DE LOS PROCESOS DE CRIOPRESERVACIÓN SOBRE LA FERTILIDAD SEMINAL  

Microsoft Academic Search

Cryopreserved semen has impaired fertility compare to fresh semen. The lower post-thaw viability and fertility is related with the spermatozoa sub lethal dys- function establishes in part of the survival population. These facts are relations with many factors (e.g. cold shock, cooling rate, extender composition, and osmotic stress) during the cryopreservation process. In this paper factor affecting the quality or

MC Stornelli; CM Tittarelli; CA Savignone; MA Stornelli

407

Una alternativa de reparto para la provisión de los servicios municipales mínimos y comunes: la participación incondicional municipal en los ingresos del gobierno superior  

Microsoft Academic Search

El trabajo presenta un modelo alternativo de reparto entre los municipios de un fondo público (financiado por la Generalitat Valenciana cumpliendo con el artículo 142 de la Constitución Española), de tal manera que las necesidades de todos ellos queden cubiertas por igual en términos relativos. Se defiende que el sistema de reparto, comparado con los propuestos por otros autores o

José Salvador Miñana Simó

1996-01-01

408

Let Book Joy Begin @ Your Library[R]!: Ten Years of El Dia de los Ninos/El Dia de los Libros  

ERIC Educational Resources Information Center

Ten years ago, in 1996, poet and children's book author, Pat Mora began celebrating "book joy" by founding a children's book and reading day, El Dia de los Ninos/El Dia de los Libros or Children's Day/Book Day. Dia is modeled on National Children's Day Celebrations in Mexico held since 1925 when it was launched in conjunction with a World…

Roy, Loriene

2007-01-01

409

Mixed low-level waste minimization at Los Alamos  

SciTech Connect

During the first six months of University of California 98 Fiscal Year (July--December) Los Alamos National Laboratory has achieved a 57% reduction in mixed low-level waste generation. This has been accomplished through a systems approach that identified and minimized the largest MLLW streams. These included surface-contaminated lead, lead-lined gloveboxes, printed circuit boards, and activated fluorescent lamps. Specific waste minimization projects have been initiated to address these streams. In addition, several chemical processing equipment upgrades are being implemented. Use of contaminated lead is planned for several high energy proton beam stop applications and stainless steel encapsulated lead is being evaluated for other radiological control area applications. INEEL is assisting Los Alamos with a complete systems analysis of analytical chemistry derived mixed wastes at the CMR building and with a minimum life-cycle cost standard glovebox design. Funding for waste minimization upgrades has come from several sources: generator programs, waste management, the generator set-aside program, and Defense Programs funding to INEEL.

Starke, T.P.

1998-12-01

410

Seismic vulnerability study Los Alamos Meson Physics Facility (LAMPF)  

SciTech Connect

The Los Alamos Meson Physics Facility (LAMPF), located at TA-53 of Los Alamos National Laboratory (LANL), features an 800 MeV proton accelerator used for nuclear physics and materials science research. As part of the implementation of DOE Order 5480.25 and in preparation for DOE Order 5480.28, a seismic vulnerability study of the structures, systems, and components (SSCs) supporting the beam line from the accelerator building through to the ends of die various beam stops at LAMPF has been performed. The study was accomplished using the SQUG GIP methodology to assess the capability of the various SSCs to resist an evaluation basis earthquake. The evaluation basis earthquake was selected from site specific seismic hazard studies. The goals for the study were as follows: (1) identify SSCs which are vulnerable to seismic loads; and (2) ensure that those SSCs screened during die evaluation met the performance goals required for DOE Order 5480.28. The first goal was obtained by applying the SQUG GIP methodology to those SSCS represented in the experience data base. For those SSCs not represented in the data base, information was gathered and a significant amount of engineering judgment applied to determine whether to screen the SSC or to classify it as an outlier. To assure the performance goals required by DOE Order 5480.28 are met, modifications to the SQUG GIP methodology proposed by Salmon and Kennedy were used. The results of this study ire presented in this paper.

Salmon, M. [EQE International, Inc., Irvine, CA (United States); Goen, L.K. [Los Alamos National Lab., NM (United States)

1995-12-01

411

Speciation of arsenic in ambient aerosols collected in Los Angeles  

SciTech Connect

The authors present measurements in the Los Angeles area, of the potentially toxic inorganic species of arsenic (arsenite and arsenate) obtained in fine and coarse atmospheric particles. A recently developed method -- which included procedures for sample collection, preparation, and analysis -- was used in this study. In this method, size-fractionated aerosol samples were collected using a high-volume dichotomous virtual impactor which employed PTFE filters. A section of each filter was leached in 10{sup -4} N HCl for 1 hour at 85{sup 0}C. The concentrations of As(III) and As(V) were then determined from a single sample aliquot by a two-step reduction procedure employing Zn metal powder and NaBH{sub 4}. The arsenic species produced during each reduction step (arsine) was then detected by flame atomic absorption spectroscopy. Using this method, results were obtained for the recovery of arsenic standards added to unexposed and collected filters. These data indicated, that this method can be used to quantitatively determine concentrations of As(III) and As(V) in atmospheric particulate matter samples collected in the Los Angeles area.

Rabano, E.S.; Castillo, N.T.; Torre, K.J. (California Air Resources Board, El Monte, CA (US)); Solomon, P.A. (California Inst. of Tech., Pasadena, CA (USA))

1987-01-01

412

Investigation of excess thyroid cancer incidence in Los Alamos County  

SciTech Connect

Los Alamos County (LAC) is home to the Los Alamos National Laboratory, a U.S. Department of Energy (DOE) nuclear research and design facility. In 1991, the DOE funded the New Mexico Department of Health to conduct a review of cancer incidence rates in LAC in response to citizen concerns over what was perceived as a large excess of brain tumors and a possible relationship to radiological contaminants from the Laboratory. The study found no unusual or alarming pattern in the incidence of brain cancer, however, a fourfold excess of thyroid cancer was observed during the late-1980`s. A rapid review of the medical records for cases diagnosed between 1986 and 1990 failed to demonstrate that the thyroid cancer excess had resulted from enhanced detection. Surveillance activities subsequently undertaken to monitor the trend revealed that the excess persisted into 1993. A feasibility assessment of further studies was made, and ultimately, an investigation was conducted to document the epidemiologic characteristics of the excess in detail and to explore possible causes through a case-series records review. Findings from the investigation are the subject of this report.

Athas, W.F.

1996-04-01

413

System requirements for the Los Alamos foil-implosion project  

SciTech Connect

The goal of the Los Alamos imploding foil project is the development of an intense source of soft x rays and hot plasma produced from the thermalization of 1 to 10 MJ of plasma kinetic energy. The source will be used for material studies and fusion experiments. Specifically, thin, current-carrying cylindrical metallic plasmas are imploded via their self-magnetic forces. Features of this project are the use of high-explosive-driven flux-compression generators as the prime power source to achieve very high energies and fast opening switches to shorten the electrical pulses. To reach a load kinetic energy of 10 MJ, it is expected that the foil-plasma must carry about 50 MA of current and must implode in less than 1/2 ..mu..sec. This imposes the requirements that switch opening times must be less than 1/2 ..mu..sec and the transmission line must withstand voltages of about 1 MV. The system being pursued at Los Alamos is described, and model calculations are presented.

Brownell, J.; Bowers, R.; Greene, A.; Lindemuth, I.; Nickel, G.; Oliphant, T.; Weiss, D.

1983-01-01

414

Solar pond research at the Los Alamos National Laboratory  

SciTech Connect

A description of solar pond research at Los Alamos National Laboratory is presented. The main issues in the theory of solar ponds are discussed. Among these are the interfacial-boundary-layer model, models for interface motion and pond performance, heat extraction, and ground heat loss. The core of the research effort at Los Alamos was the development of a one-dimensional computer program to accurately predict dynamic performance of a solar pond. The computer model and the experiments that were designed and performed to validate it are described. The experiments include two laboratory tanks wherein temperature, salinity, and flow visualization data were obtained and a 232 m/sup 2/ outdoor solar pond. Results from preliminary validation show good agreement between the pond's predicted dynamic behavior and that which actually occurred in the experiments. More validation using data from full-sized solar ponds is needed. A new correlation for the ratio of interfacial salt-flux to heat-flux is proposed which agrees well with our data. Recommendations for future research are given.

Jones, G.F.; Meyer, K.A.; Hedstrom, J.C.; Grimmer, D.P.

1984-01-01

415

Los Alamos Opacities: Transition from LEDCOP to ATOMIC  

SciTech Connect

This paper discusses the development of the ATOMIC code, a new low to mid Z opacity code, which will replace the current Los Alamos low Z opacity code LEDCOP. The ATOMIC code is based on the FINE code, long used by the Los Alamos group for spectral comparisons in local thermodynamic equilibrium (LTE) and for non-LTE calculations, utilizing the extensive databases from the atomic physics suite of codes based on the work of R. D. Cowan. Many of the plasma physics packages in LEDCOP, such as line broadening and free-free absorption, are being transferred to the new ATOMIC code. A new equation of state (EOS) model is being developed to allow higher density calculations than were possible with either the FINE or LEDCOP codes. Extensive modernization for both ATOMIC and the atomic physics code suites, including conversion to Fortran 90 and parallelization, are under way to speed up the calculations and to allow the use of expanded databases for both the LTE opacity tables and the non-LTE calculations. Future plans will be outlined, including considerations for new generation opacity tables.

Magee, N.H.; Abdallah, J.; Colgan, J.; Hakel, P.; Kilcrease, D.P.; Mazevet, S.; Sherrill, M. [Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Fontes, C.J.; Zhang, H.L. [Applied Theory Division, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

2004-10-20

416

Exploding metallic foil fuse modeling at Los Alamos  

SciTech Connect

A ''first-principles'' computational model of exploding metallic foil behavior has been developed at Los Alamos. The model couples zero-dimensional magnetohydrodynamics with ohmic heating and electrical circuit equations and uses the Los Alamos SESAME atomic data base computer library to determine the foil material's temperature- and density-dependent pressure, specific energy, and electrical conductivity. The model encompasses many previously successful empirical models and offers plausible physical explanations of phenomena not treated by the empirical models. In addition to addressing the electrical circuit performance of an exploding foil, the model provides information on the temporal evolution of the foil material's density, temperature, pressure, electrical conductivity, and expansion and translational velocities. In this paper, we report the physical insight gained by computational studies of two opening switch concepts being developed for application in an FCG-driven 1-MJ-class imploding plasma z-pinch experiment. The first concept considered is a ''conventional'' electrically exploded fuse, which has been demonstrated to operate at 16 MA driven by the 15-MJ-class FCG to be used in the 1 MJ implosion experiment. The second concept considered is a Type 2 explosively formed fuse (EFF), which has been demonstrated to operate at the 8 MA level by a 1-MJ-class FCG.

Lindemuth, I.R.; Reinovsky, R.E.; Goforth, J.H.

1989-01-01

417

Los Alamos Center for Computer Security formal computer security model  

SciTech Connect

This paper provides a brief presentation of the formal computer security model currently being developed at the Los Alamos Department of Energy (DOE) Center for Computer Security (CCS). The need to test and verify DOE computer security policy implementation first motivated this effort. The actual analytical model was a result of the integration of current research in computer security and previous modeling and research experiences. The model is being developed to define a generic view of the computer and network security domains, to provide a theoretical basis for the design of a security model, and to address the limitations of present formal mathematical models for computer security. The fundamental objective of computer security is to prevent the unauthorized and unaccountable access to a system. The inherent vulnerabilities of computer systems result in various threats from unauthorized access. The foundation of the Los Alamos DOE CCS model is a series of functionally dependent probability equations, relations, and expressions. The model is undergoing continued discrimination and evolution. We expect to apply the model to the discipline of the Bell and LaPadula abstract sets of objects and subjects. 6 refs.

Dreicer, J.S.; Hunteman, W.J.; Markin, J.T.

1989-01-01

418

Electronic full-image reports at Los Alamos National Laboratory  

SciTech Connect

Los Alamos National Laboratory is a Department of Energy laboratory operated by the University of California. There are over 10,000 laboratory employees and contractors, many engaged in a variety of scientific and technical research. The laboratory covers forty-three square miles in northern New Mexico, one hundred miles from the nearest city which might reasonably be expected to meet the needs of the researchers. Because of the remoteness of the institution, the Research Library is a vital source for scientific and technical information. Due to the size of the institution, access to the physical library is difficult. These barriers, along with advances in technology, have led the Research Library to provide desktop access to all formal, unlimited Los Alamos reports. Older reports have been scanned and newer ones are received in electronic format. Currently over 10,000 reports are available in portable document format (PDF) via the World Wide Web (http://lib-www.lanl.gov). Researchers can search the library Web catalog (on a Z39.50 server), find a report, and click on a link to automatically bring up the report. This has been an extremely successful project as shown by the high usage, over 3,000 files retrieved per month in 1997 compared with around 100 for the hardcopy. This paper will discuss the reasons for, and the mechanics of, digitizing the reports, the results that have been observed, and plans for the future.

Mosier, M.L.

1998-03-02

419

Fuels Inventories in the Los Alamos National Laboratory Region: 1997  

SciTech Connect

Fifty-four sites were surveyed for fuel levels, vegetational structures, and topographic characteristics. Most of the surveyed sites were on Los Alamos National Laboratory property, however, some surveys were also conducted on U.S. Forest Service property. The overall vegetation of these sites ranged from pinon-juniper woodlands to ponderosa pine forests to mixed conifer forests, and the topographic positions included canyons, mesas, and mountains. The results of these surveys indicate that the understory fuels are the greatest in mixed conifer forests and that overstory fuels are greatest in both mixed conifer forests and ponderosa pine forests on mesas. The geographic distribution of these fuels would suggest a most credible wildfire scenario for the Los Alamos region. Three major fires have occurred since 1954 and these fires behaved in a manner that is consistent with this scenario. The most credible wildfire scenario was also supported by the results of BEHAVE modeling that used the fuels inventory data as inputs. Output from the BEHAVE model suggested that catastrophic wildfires would continue to occur during any season with sufficiently dry, windy weather.

Balice, R.G.; Oswald, B.P.; Martin, C.

1999-03-01

420

Those Who Left, Those Who Stayed: Exploring the Educational Opportunities of High-Achieving Black and Latina/o Students at Magnet and Nonmagnet Los Angeles High Schools (2001-2002)  

ERIC Educational Resources Information Center

Being that educational disparities, manifested through socioeconomic instability, were a major contributing factor to the Los Angeles riots, it is important to examine how public high schools are now shaping the postsecondary opportunities of underrepresented students. Using opportunity-to-learn (OTL) and bounded rationality as frames, this…

Griffin, Kimberly A.; Allen, Walter R.; Kimura-Walsh, Erin; Yamamura, Erica K.

2007-01-01

421

Environmental Assessment for Electrical Power System Upgrades at Los Alamos National Laboratory, Los Alamos, New Mexico - Final Document  

SciTech Connect

The ''National Environmental Policy Act of 1969'' (NEPA) requires Federal agency officials to consider the environmental consequences of their proposed actions before decisions are made. In complying with NEPA, the United States (U.S.) Department of Energy (DOE) follows the Council on Environmental Quality (CEQ) regulations (40 Code of Federal Regulations [CFR] 1500-1508) and DOE's NEPA implementing procedures (10 CFR 1021). The purpose of an Environmental Assessment (EA) is to provide Federal decision makers with sufficient evidence and analysis to determine whether to prepare an Environmental Impact Statement (EIS) or issue a Finding of No Significant Impact. In this case, the DOE decision to be made is whether to construct and operate a 19.5-mile (mi) (31-kilometer [km]) electric transmission line (power line) reaching from the Norton Substation, west across the Rio Grande, to locations within the Los Alamos National Laboratory (LANL) Technical Areas (TAs) 3 and 5 at Los Alamos, New Mexico. The construction of one electric substation at LANL would be included in the project as would the construction of two line segments less than 1,200 feet (ft) (366 meters [m]) long that would allow for the uncrossing of a portion of two existing power lines. Additionally, a fiber optics communications line would be included and installed concurrently as part of the required overhead ground conductor for the power line. The new power line would improve the reliability of electric service in the LANL and Los Aktrnos County areas as would the uncrossing of the crossed segments of the existing lines. Additionally, installation of the new power line would enable the LANL and the Los Alamos County electric grid, which is a shared resource, to be adapted to accommodate the future import of increased power when additional power service becomes available in the northern New Mexico area. Similarly, the fiber optics line would allow DOE to take advantage of future opportunities in enhanced communications services. The objectives of this EA are to (1) describe the baseline environmental conditions at the proposed power line location, (2) analyze the potential effects to the existing environment from construction, operation, and maintenance of a new power line, and (3) compare the effects of the Proposed Action and the four action alternatives to the No Action Alternative. In addition, the EA provides DOE with environmental information that could be used in developing mitigative actions to minimize or avoid adverse effects to the integrity of the human environment and natural ecosystems should DOE decide to proceed with construction and operation of the new power line. Ultimately, the goal of NEPA and this EA is to aid DOE officials in making decisions based on understanding the environmental consequences of their decision.

N /A

2000-03-09

422

Water supply at Los Alamos: Current status of wells and future water supply  

SciTech Connect

The municipal and industrial use of groundwater at the Los Alamos National Laboratory and Los Alamos County was about 1.5 billion gallons during 1986. From a total of 19 wells that range in age from 5 to 41 years, the water was pumped from 3 well fields. The life expectancy of a well in the area ranges from 30 to 50 years, dependent on the well construction and rate of corrosion of the casing and screen. Twelve of the wells are more than 30-years old and, of these, four cannot be used for production, three because of well damage and one because the quality of water is not suitable for use. Eight of the twelve oldest wells are likely to be unsuitable for use in the next 10 years because of well deterioration and failure. The remaining 7 wells include 2 that are likely to fail in the next 20 years. Five of the younger wells in the Pajarito well field are in good condition and should serve for another two or three decades. The program of maintenance and rehabilitation of pumps and wells has extended production capabilities for short periods of time. Pumps may be effectively repaired or replaced; however, rehabilitation of the well is only a short-term correction to increase the yield before it starts to decline again. The two main factors that prevent successful well rehabilitation are: (1) chemicals precipitated in the gravel pack and screen restrict or reduce the entrance of water to the well, which reduces the yield of the well, and (2) the screen and casing become corroded to a point of losing structural strength and subsequent failure allows the gravel pack and formation sand to enter the well. Both factors are due to long-term use and result in extensive damage to the pump and reduce the depth of the well, which in turn causes the yield to decline. Once such well damage occurs, rehabilitation is unlikely to be successful and the ultimate result is loss of the well. Two wells were lost in 1987 because of such damage. 29 refs., 15 figs., 15 tabs.

Purtymun, W.D.; Stoker, A.K.

1988-08-01

423

DIABETES MELLITUS COMO FACTOR DE RIESGO DE DEMENCIA EN LA POBLACI?N ADULTA MAYOR MEXICANA  

PubMed Central

Introduccion La diabetes mellitus y las demencias constituyen dos problemas crecientes de salud entre la población adulta mayor del mundo y en particular de los paises en desarrollo. Hacen falta estudios longitudinales sobre el papel de la diabetes como factor de riesgo para demencia. Objetivo Determinar el riesgo de demencia en sujetos Mexicanos con diabetes mellitus tipo 2. Materiales y Metodos Los sujetos diabéticos libres de demencia pertenecientes al Estudio Nacional de Salud y Envejecimiento en México fueron evaluados a los dos años de la línea de base. Se estudió el papel de los factores sociodemográficos, de otras comorbilidades y del tipo de tratamiento en la conversión a demencia. Resultados Durante la línea de base 749 sujetos (13.8%) tuvieron diabetes. El riesgo de desarrollar demencia en estos individuos fue el doble (RR, 2.08 IC 95%, 1.59–2.73). Se encontró un riesgo mayor en individuos de 80 años y más (RR 2.44 IC 95%, 1.46–4.08), en los hombres (RR, 2.25 IC 95%, 1.46–3.49) y en sujetos con nivel educativo menor de 7 años. El estar bajo tratamiento con insulina incrementó el riesgo de demencia (RR, 2.83, IC 95%, 1.58–5.06). Las otras comorbilidades que aumentaron el riesgo de demencia en los pacientes diabéticos fueron la hipertensión (RR, 2.75, IC 95%, 1.86–4.06) y la depresión (RR, 3.78, 95% IC 2.37–6.04). Conclusión Los sujetos con diabetes mellitus tienen un riesgo mayor de desarrollar demencia, La baja escolaridad y otras comorbilidades altamente prevalentes en la población Mexicana contribuyen a la asociación diabetes-demencia.

Silvia, Mejia-Arango; Clemente, y Zuniga-Gil

2012-01-01

424

?????(?,?') transition form factors  

NASA Astrophysics Data System (ADS)

The surprising results by the BABAR Collaboration on the ?? transition form factor require new thoughts about the high-Q2 dependence of the form factors with virtual photons. We make use of the anomaly sum rule [J. Horejsi and O. Teryaev, Z. Phys. C 65, 691 (1995).ZPCFD20170-973910.1007/BF01578676] which relates the hadron spectral density to the axial anomaly [S. Adler, Phys. Rev. 177, 2426 (1969); J. S. Bell and R. Jackiw, Nuovo Cimento A 60, 47 (1969).]. We study the quark-hadron duality relation for this sum rule and find out that the increase of the rescaled form factor Q2F??(Q2)˜log?(Q2) suggested by the BABAR data requires the presence of a 1/s-correction term in the relation between the one-loop spectral density and the hadron-continuum spectral density.

Melikhov, Dmitri; Stech, Berthold

2012-03-01

425

Bovine factor XIIa inhibitor.  

PubMed

Bovine factor XIIa inhibitor was purified by an improved method employing affinity for heparin. N-terminal amino acid sequencing revealed a unique sequence without homology to any other known protein sequences. Peptide sequencing, however, showed that a part of the bovine factor XIIa inhibitor was homologous to human C1-inhibitor with a fraction of identical amino acid residues around 70%. Deglycosylation studies and carbohydrate analysis showed the presence of N- and O-linked carbohydrate. Bovine factor XIIa inhibitor did not inhibit plasma kallikrein and trypsin. The reactive site comprised an Arg-Asn bond, and represents the first example of asparagine as a P1' residue in Serpins with well documented inhibitory activity. PMID:8457651

Muldbjerg, M; Markussen, S; Magnusson, S; Halkier, T

1993-02-01

426

DSN human factors project  

NASA Technical Reports Server (NTRS)

The project plan was to hold focus groups to identify the factors influencing the ease of use characteristics of software and to bond the problem. A questionnaire survey was conducted to evaluate those factors which were more appropriately measured with that method. The performance oriented factors were analyzed and relationships hypothesized. The hypotheses were put to test in the experimental phase of the project. In summary, the initial analysis indicates that there is an initial performance effect favoring computer controlled dialogue but the advantage fades fast as operators become experienced. The user documentation style is seen to have a significant effect on performance. The menu and prompt command formats are preferred by inexperienced operators. The short form mnemonic is least favored. There is no clear best command format but the short form mnemonic is clearly the worst.

Chafin, R. L.; Martin, T. H.

1980-01-01

427

Psychological factors in asthma.  

PubMed

: Asthma has long been considered a condition in which psychological factors have a role. As in many illnesses, psychological variables may affect outcome in asthma via their effects on treatment adherence and symptom reporting. Emerging evidence suggests that the relation between asthma and psychological factors may be more complex than that, however. Central cognitive processes may influence not only the interpretation of asthma symptoms but also the manifestation of measurable changes in immune and physiologic markers of asthma. Furthermore, asthma and major depressive disorder share several risk factors and have similar patterns of dysregulation in key biologic systems, including the neuroendocrine stress response, cytokines, and neuropeptides. Despite the evidence that depression is common in people with asthma and exerts a negative impact on outcome, few treatment studies have examined whether improving symptoms of depression do, in fact, result in better control of asthma symptoms or improved quality of life in patients with asthma. PMID:20525122

Van Lieshout, Ryan J; Macqueen, Glenda

2008-03-15

428

Antiretroviral Restriction Factors  

PubMed Central

Studies of retroviruses have been instrumental in revealing the existence of an array of antiviral proteins, or restriction factors, and the mechanisms by which they function. Some restriction factors appear to specifically inhibit retrovirus replication, while others have a broader antiviral action. Here, we briefly review current understanding of the mechanisms by which several such proteins exert antiviral activity. We also discuss how retroviruses have evolved to evade or antagonize antiviral proteins, including through the action of viral accessory proteins. Restriction factors, their viral targets and antagonists have exerted evolutionary pressure on each other, resulting in specialization and barriers to cross-species transmission. Potentially, this recently revealed intrinsic system of antiviral immunity might be mobilized for therapeutic benefit.

Hatziioannou, Theodora; Bieniasz, Paul D.

2011-01-01

429

Factor D Enzyme  

NASA Technical Reports Server (NTRS)

The trauma caused by the open heart surgery often triggers massive inflammation because the immune system overreacts. Factor D, the protein which plays a key role in the biological steps that activate this immune response prevents the imune system from inappropriately rurning out of control, allowing the patient to recover more rapidly. Factor D blockers, with their great potential to alleviate the complication of inflammation associated with heart surgery, are now being developed for clinical trials. These new drugs, developed from space research, should be commercially available as soon as year 2001.

2004-01-01

430

Radiative Gaunt factors  

NASA Astrophysics Data System (ADS)

Numerical methods for the evaluation of radiative Gaunt factors for complex ions, and for the calculation of the principal integrals over the Gaunt factors relevant to plasma spectroscopy, are presented. The present techniques are suitable for the computation of intermediate accuracy results for large numbers of ions over extended parameter ranges, and they cover bound-bound, bound-free, and free-free cases in both hydrogenic and nonhydrogenic approximations. The results demonstrate the reliability of the numerical methods and their advantages over the methods of Peach (1965, 1967) and Burgess and Seaton (1960). Significant differences from hydrogenic results at low and moderate z values are pointed out.

Burgess, Alan; Summers, Hugh P.

1987-05-01

431

Metric Conversion Factors  

NSDL National Science Digital Library

Brought to the Web by Washington State Department of Transportation, the Metric Conversion Factors site contains a wealth of helpful physical science and engineering information. As you might guess, all sorts of conversion factors are presented, such as for area, force, hard conversions for construction materials, length, mass, pavement, pipe, plate, power, pressure or stress, reinforcing steel, sheet metal, sieve, symbols, temperature, volume, and several others. Although it's not an online conversion calculator, all of the pages are set up for efficient printing so that students can have the information with them while doing homework.

432

The Transcription Factor Encyclopedia  

PubMed Central

Here we present the Transcription Factor Encyclopedia (TFe), a new web-based compendium of mini review articles on transcription factors (TFs) that is founded on the principles of open access and collaboration. Our consortium of over 100 researchers has collectively contributed over 130 mini review articles on pertinent human, mouse and rat TFs. Notable features of the TFe website include a high-quality PDF generator and web API for programmatic data retrieval. TFe aims to rapidly educate scientists about the TFs they encounter through the delivery of succinct summaries written and vetted by experts in the field. TFe is available at http://www.cisreg.ca/tfe.

2012-01-01

433

On braid monodromy factorizations  

NASA Astrophysics Data System (ADS)

We introduce and develop a language of semigroups over the braid groups to study the braid monodromy factorizations (bmf's) of plane algebraic curves and other related objects. As an application, we give a new proof of Orevkov's theorem on the realization of bmf's over a disc by algebraic curves and show that the complexity of such a realization cannot be bounded in terms of the types of factors of the bmf. We also prove that the type of a bmf distinguishes Hurwitz curves with singularities of inseparable type up to H-isotopy and J-holomorphic cuspidal curves in \\mathbb{CP}^2 up to symplectic isotopy.

Kharlamov, V. M.; Kulikov, Vik S.

2003-06-01

434

Factors predicting hospital length-of-stay after radical prostatectomy: a population-based study  

PubMed Central

Background Radical prostatectomy (RP) is a leading treatment option for localised prostate cancer. Although hospital in-patient stays accounts for much of the costs of treatment, little is known about population-level trends in length-of-stay (LOS). We investigated factors predicting hospital LOS and readmissions in men who had RP following prostate cancer. Methods Incident prostate cancers (ICD-O3: C61), diagnosed January 2002-December 2008 in men?LOS was calculated as the number of days from date of admission to date of discharge. Patient-, tumour-, and health service-related factors predicting longer LOS (upper quartile, >9 days) were investigated using logistic regression. Patterns in day-case and in-patient readmissions within 28 days of discharge following RP were explored. Results Over the study period 9096 prostate cancers were diagnosed in men under 70, 26.5% of whom had RP by end of follow-up 31/12/2009. Two of eight public hospitals and eight of forty surgeons carried out 50% of all public-service RPs. Median LOS was 8 days (10th-90th percentile =?6-13 days) and fell significantly over time (2002, 9 days; 2008, 7 days; p?LOS. Those treated in higher volume hospitals (annual median >49 RPs) or by higher volume surgeons (annual median?>17 RPs) were significantly less likely to have prolonged LOS (OR?=?0.34, 95% CI 0.26-0.45; OR?=?0.55, 95% CI 0.42-0.71 respectively). Conclusion Median LOS after RP decreased between 2002 and 2008 in Ireland but it remains higher than in both England and the US. Although volumes of RPs conducted in Ireland are low, there is considerable variation between hospitals and surgeons. Hospital and surgeon volume were strong predictors of shorter LOS, after adjusting for other variables. These factors point to a need for a comprehensive review of prostate cancer service provision.

2013-01-01

435

Salivary Gland Cancer: Risk Factors  

MedlinePLUS

... Board , 4/2014 Risk Factors Cancer.Net Guide Salivary Gland Cancer Overview Statistics Medical Illustrations Risk Factors Symptoms ... and health care choices. The cause(s) of most salivary gland cancers are unknown, but the following factors may ...

436

Los Alamos National Laboratory support to IAEA environmental safeguards  

SciTech Connect

The nuclear and radiochemistry group provides sample preparation and analysis support to the International Atomic Energy Agency (IAEA) Network of Analytical Laboratories (NWAL). These analyses include both non-destructive (alpha and gamma-ray spectrometry) and destructive (thermal ionization mass spectrometry and inductively coupled plasma mass spectrometry) methods. On a bi-annual basis the NWAL laboratories are invited to meet to discuss program evolution and issues. During this meeting each participating laboratory summarizes their efforts over the previous two years. This presentation will present Los Alamos National Laboratories efforts in support of this program. Data showing results from sample and blank analysis will be presented along with capability enhancement and issues that arose over the previous two years.

Steiner, Robert E [Los Alamos National Laboratory; Dry, Don E [Los Alamos National Laboratory; Roensch, Fred R [Los Alamos National Laboratory; Kinman, Will S [Los Alamos National Laboratory; Roach, Jeff L [Los Alamos National Laboratory; La Mont, Stephen P [Los Alamos National Laboratory

2010-12-01

437

Neutron Capture Experiments Using the DANCE Array at Los Alamos  

SciTech Connect

The Detector for Advanced Neutron Capture Experiments (DANCE) is designed for neutron capture measurements on very small and/or radioactive targets. The DANCE array of 160 BaF{sub 2} scintillation detectors is located at the Lujan Center at the Los Alamos Neutron Science Center (LANSCE). Accurate measurements of neutron capture data are important for many current applications as well as for basic understanding of neutron capture. The gamma rays following neutron capture reactions have been studied by the time-of-flight technique using the DANCE array. The high granularity of the array allows measurements of the gamma-ray multiplicity. The gamma-ray multiplicities and energy spectra for different multiplicities can be measured and analyzed for spin and parity determination of the resolved resonances.

Dashdorj, D. [North Carolina State University, Raleigh, NC 27695 (United States); MonAme Scientific Research Center, Ulaanbaatar (Mongolia); Mitchell, G. E. [North Carolina State University, Raleigh, NC 27695 (United States); Triangle Universities Nuclear Laboratory, Durham, NC 27708 (United States); Baramsai, B.; Chyzh, A.; Walker, C. [North Carolina State University, Raleigh, NC 27695 (United States); Agvaanluvsan, U. [MonAme Scientific Research Center, Ulaanbaatar (Mongolia); Stanford University, Palo Alto, CA 94305 (United States); Becker, J. A.; Parker, W.; Sleaford, B.; Wu, C. Y. [Lawrence Livermore National Laboratory, Livermore, CA 9455 (United States); Bredeweg, T. A.; Couture, A.; Haight, R. C.; Jandel, M.; Rundberg, R. S.; Ullmann, J. L.; Vieira, D. J.; Wouters, J. M. [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Krticka, M.; Becvar, F. [Charles University in Prague, CZ-180 00 Prague 8 (Czech Republic)

2009-03-31

438

XUV free-electron laser development at Los Alamos  

SciTech Connect

Free-electron lasers (FELs) for the vacuum-ultraviolet and soft x-ray spectral regions (together termed the XUV) are being developed at Los Alamos for integration into a proposed national UV/XUV FEL user facility for scientific experimentation. This facility would consist of a sequence of up to 15 FEL oscillators and amplifiers, driven by a single, rf-linear accelerator, that will generate broadly tunable, picosecond-pulse, coherent radiation over the range from 1 to 400 nm. Below 300 nm, the peak- and average-power output of these FEL devices should surpass the capabilities of any existing, continuously tunable photon sources by many orders of magnitude. We list the design parameters and predicted output of these FELs and make comparison with synchrotron radiation sources. Brief mention is given to our recent progress in developing the three primary components (electron beam, magnetic undulator, and resonator mirrors). 24 refs., 2 figs., 3 tabs.

Newnam, B.E.

1988-01-01

439

Experiments on planar plasma flow switches at Los Alamos  

SciTech Connect

The authors have performed a series of experiments on the Colt facility at Los Alamos to study the performance of plasma flow switches and to understand the important physics issues which affect that performance. These experiments were done in planar geometry on a small machine to allow for better diagnostic access and a higher repetition rate. The Colt facility is a capacitor bank which stores 300 kJ at maximum charge and produced a peak current of 1.1 MA in 2.0 microseconds for these experiments. The diagnostics used for these experiments included an array of b-dot probes, visible framing pictures, visible spectroscopy, and laser interferometry. Characteristics of the switch are determined from spatial and temporal profiles of the magnetic field and the spatial profile and temperature of the switch plasma. Here the authors present results from experiments for a variety of switch conditions.

Benage, J.F. Jr.; Wysocki, F.J.; Bowers, R.; Oona, H. [and others

1997-12-01

440

Recent progress of the Los Alamos advanced free electron laser  

SciTech Connect

Many industrial and research applications can benefit from the availability of a compact, user-friendly, broadly tunable and high average power free electron laser (FEL). Over the past four years, the Los Alamos Advanced FEL has been built with these design goals. The key to a compact FEL is the integration of advanced beam technologies such as a high-brightness photoinjector, a high-gradient compact linac, and permanent magnet beamline components. These technologies enable the authors to shrink the FEL size yet maintain its high average power capability. The Advanced FEL has been in operation in the near ir (4-6 {mu}m) since early 1993. Recent results of the Advanced FEL lasing at saturation and upgrades to improve its average power are presented.

Nguyen, D.C.; Austin, R.H.; Chan, K.C.D.; Feldman, D.W.; Goldstein, J.C.; Gierman, S.M.; Kinross-Wright, J.M.; Kong, S.H.; Plato, J.G.; Russell, S.J. [and others

1994-05-01

441

Initial performance of Los Alamos Advanced Free Electron Laser  

SciTech Connect

The Los Alamos compact Advanced FEL has lased at 4.7 and 5.2 {mu}m with a 1-cm period wiggler and a high-brightness electron beam at 16.8 and 15.8 MeV, respectively. The measured electron beam normalized emittance is 1.7 {pi}{center_dot}mm{center_dot}mrad at a peak current of 100 A, corresponding to a beam brightness greater than 2 {times} 10{sup 12} A/m{sup 2}rad{sup 2}. Initial results indicate that the AFEL small signal gain is {approximately}8% at 0.3 nC (30 A peak). The maximum output energy is 7 mJ over a 2-{mu}s macropulse. The AFEL performance can be significantly enhanced by improvements in the rf and drive laser stability.

Nguyen, D.C.; Austin, R.H.; Chan, K.C.D. [and others

1993-09-01

442

Los Angeles air pollution and asthma in children  

SciTech Connect

Indices of air pollution, meteorological conditions and airborne allergens were correlated with emergency room census and hospitalizations for asthma at the Childrens Hospital of Los Angeles (CHLA) during a six-month period encompassing high and low periods of air pollution. In addition, patients in residence at the Sunair Home for Asthmatic Children (SHAC) were studied during a 10-day peak air pollution period. Increases in asthma emergency room visits and hospitalizations correlated significantly with increases in nitric oxide, coefficient of haze, hydrocarbons, Santa Ana wind conditions and total airborne allergen counts. Significant correlations were also found with decreases in ambient levels of O3, SO2, temperature and relative humidity. Among SHAC patients morning peak flow levels were significantly lower during the 10-day peak pollution period than during two control periods of low pollution. However, neither differences in clinical symptoms experienced by these patients nor their need for additional medication were observed.

Richards, W.; Azen, S.P.; Weiss, J.; Stocking, S.; Church, J.

1981-11-01

443

Los Alamos Guns Take Aim at Material's Mysteries  

ScienceCinema

Los Alamos National Laboratory scientists and technicians conduct thousands of experiments a year, delving into the fundamental nature of everything from supernovas to subatomic particles. One set of instruments used to better understand the fundamental nature of various materials are 10 scientific gun systems that fire various projectiles at high-tech targets to create enormous velocities, pressures, and temperatures - and using laser, x-ray, and other diagnostics - explore the very nature of metals and other materials. The hundreds of gun-based experiments conducted every year at the Laboratory require a highly-skilled staff of scientists and technicians, and has given rise to a special organization called the "gun working group" to foster open communications, cooperation, problem-solving, and a healthy safety culture.

Byers, Mark; Moore, David; Dimarino, Steve

2014-05-30

444

Study of polyelectrolytes for Los Alamos National Laboratory. Final report  

SciTech Connect

To assess the safety of a potential radioactive waste repository, analysis of the fluid solution containing low levels of activity need to be performed. In some cases, the radioactivity would be so weak (3--30 pCi/L) that the solution must be concentrated for measurement. For this purpose, Los Alamos National Laboratory scientists are synthesizing some water soluble polyelectrolytes, which, because they are strong complexing agents for inorganic cations, can concentrate the radioelements in solution. To assist in characterization of these polyelectrolytes, the author has performed experiments to determine physico-chemical constants, such as pKa values and stability constants. The complexation constants between both polyelectrolytes and europium were determined by two methods: solvent extraction and ion exchange. Results are presented.

Labonne, N. [Florida State Univ., Tallahassee, FL (United States)

1994-11-01

445

Los Alamos National Laboratory capability reviews - FY 2011 status  

SciTech Connect

Capability reviews are the Los Alamos National Laboratory approach to assess the quality of its science, technology, and engineering (STE), and its integration across the Laboratory. There are seven capability reviews in FY 2011 reviews. The Weapons Science and Engineering review will be replaced by the National Nuclear Security Administration's Predictive Science Panel for 2011 . Beginning in 2011, third-year LORD projects will be reviewed by capability review committees rather than the first-year LORD projects that have been performed for the last three years. This change addresses concerns from committees about reviewing a project before it had made any substantive progress. The current schedule, and chairs for the 2011 capability reviews is presented. The three-year cycle (2011-2013) for capability reviews are presented for planning purposes.

Springer, Everett P [Los Alamos National Laboratory

2011-01-12

446

ACCELERATION OF LOS ALAMOS NATIONAL LABORATORY TRANSURANIC WASTE DISPOSITION  

SciTech Connect

One of Los Alamos National Laboratory's (LANL's) most significant risks is the site's inventory of transuranic waste retrievably stored above and below-ground in Technical Area (TA) 54 Area G, particularly the dispersible high-activity waste stored above-ground in deteriorating facilities. The high activity waste represents approximately 50% (by activity) of the total 292,000 PE-Ci inventory remaining to be disposed. The transuramic waste inventory includes contact-handled and remote-handled waste packaged in drums, boxes, and oversized containers which are retrievably stored both above and below-ground. Although currently managed as transuranic waste, some of the inventory is low-level waste that can be disposed onsite or at approved offsite facilities. Dispositioning the transuranic waste inventory requires retrieval of the containers from above and below-ground storage, examination and repackaging or remediation as necessary, characterization, certification and loading for shipment to the Waste Isolation Pilot Plant in Carlsbad New Mexico, all in accordance with well-defined requirements and controls. Although operations are established to process and characterize the lower-activity contact-handled transuranic waste containers, LAN L does not currently have the capability to repack high activity contact-handled transuranic waste containers (> 56 PE-Ci) or to process oversized containers with activity levels over 0.52 PE-Ci. Operational issues and compliance requirements have resulted in less than optimal processing capabilities for lower activity contact-handled transuranic waste containers, limiting preparation and reducing dependability of shipments to the Waste Isolation Pilot Plant. Since becoming the Los Alamos National Laboratory contract in June 2006, Los Alamos National Security (LANS) L.L.C. has developed a comprehensive, integrated plan to effectively and efficiently disposition the transuranic waste inventory, working in concert with the Department of Energy Los Alamos Site Office, Carlsbad Field Office and the Department of Energy Headquaeters. Rather than simply processing containers as retrieved, the plan places priority on efficient curie disposition, a direct correlation to reducing risk. Key elements of the approch include balancing inventory and operational risks, tailoring methods to meet requirements, optimizing existing facilities, equipment and staff, and incorporating best practices from other Department of Energy sites. With sufficient funding this will enable LANL to ship the above-ground high activity contact-handled transuranic waste offsite by the end of Fiscal Year (FY) 2007 and to disposition the remaining above- and below-ground contact-handled and remote-handled transuranic waste inventory by December 2010. Nearly 70% of the contact-handled transuranic waste containers, including the high activity waste, require processing and repackaging before characterization and certification for shipment to the Waste Isolation Pilot Plant. LANL is employing a balanced risk approach that accomplishes significant long-term risk reduction by accepting short-term increased facility operations risk under well-developed and justified interim controls. Reviews of facility conditions and additional analyses show that the Waste Characterization, Reduction and Repackaging Facility and the Radioassay and Nondestructive Testing Facility are the most appropriate facilities to safetly remediate, repackage, and ship lower activity and the remaining high activity drums. Updated safety documentation supporting limited Hazard Category 2 operations in these facilities has been developed. Once approved, limited-term operations to process the high activity drums can begin in early 2007, building upon the experience base established performing Hazard Category 3 operations processing lower activity waste in these facilities. LANL is also implementing a series of actions to improve and sustain operations for processing contact-handled transuranic waste inventory. Building 412 Decontamination and Volume Facility and Dom

O'LEARY, GERALD A. [Los Alamos National Laboratory

2007-01-04

447

Mushroom growing project at the Los Humeros, Mexico geothermal field  

SciTech Connect

There are several projects of direct (non-electrical) use of geothermal energy in Mexico. Personnel of the Comision Federal de Electricidad (CFE) have experience in various of these projects, like drying of timber and fruits, space heating, food processing, etc. Taking this in consideration, CFE built the Los Humeros mushroom plant using for heat source the geothermal steam from Well H-1. The main purpose of the project was to take advantage of residual geothermal energy in a food production operation and to develop the appropriate technology. In 1992, existing installations were renovated, preparing appropriate areas for pasteurization, inoculation and production. The mushroom Pleurotus ostreatus var. florida and columbinus was used. A year later, CFE proposed the construction of improved facilities for growing edible mushrooms. New materials and equipment, as well as different operation conditions, were proposed on the basis of the experience gained in the initial project. The construction and renovation activities were completed in 1994.

Rangel, M.E.R. [Comision Federal de Electricidad (Mexico)

1998-12-01

448

Los Angeles County Museum of Art Collections Online  

NSDL National Science Digital Library

LACMA, Los Angeles County Museum of Art, recently made available over 25,000 records accompanied by over 10,000 images representing items from its South and Southeast Asian, Japanese, Islamic, Photography, and Costume and Textiles collections. Another 20,000 records will be added in 2002. Keyword searches can be performed by entering text or by selecting from a drop-down menu of about 45 general terms, such as archaeological artifacts, arms & armor, furniture, glass, jewelry, prints, terracotta, or utilitarian objects. Searches can be limited to include only records with images, so that a search on shoes retrieved 45 illustrated examples of women's and children's shoes dating from the 18th to 20th centuries. Users can also browse categories such as Storeroom Treasures, Costume & Textiles, Islamic Art, Japanese Art, Photography, and South and Southeast Asian Art.

1997-01-01

449

Operational status of the Los Alamos neutron science center (LANSCE)  

SciTech Connect

The Los Alamos Neutron Science Center (LANSCE) accelerator and beam delivery complex generates the proton beams that serve three neutron production sources; the thermal and cold source for the Manuel Lujan Jr. Neutron Scattering Center, the Weapons Neutron Research (WNR) high-energy neutron source, and a pulsed Ultra-Cold Neutron Source. These three sources are the foundation of strong and productive multi-disciplinary research programs that serve a diverse and robust user community. The facility also provides multiplexed beams for the production of medical radioisotopes and proton radiography of dynamic events. The recent operating history of these sources will be reviewed and plans for performance improvement will be discussed, together with the underlying drivers for the proposed LANSCE Refurbishment project. The details of this latter project are presented in a separate contribution.

Jones, Kevin W [Los Alamos National Laboratory; Erickson, John L [Los Alamos National Laboratory; Schoenberg, Kurt F [Los Alamos National Laboratory

2010-01-01

450

Common ground: An environmental ethic for Los Alamos National Laboratory  

SciTech Connect

Three predominant philosophies have characterized American business ethical thinking over the past several decades. The first phase is the ethics of self-interest'' which argues that maximizing self-interest coincidentally maximizes the common good. The second phase is legality ethics.'' Proponents argue that what is important is knowing the rules and following them scrupulously. The third phase might be called stake-holder ethics.'' A central tenant is that everyone affected by a decision has a moral hold on the decision maker. This paper will discuss one recent initiative of the Los Alamos National Laboratory to move beyond rules and regulations toward an environmental ethic that integrates the values of stakeholder ethics'' into the Laboratory's historical culture and value systems. These Common Ground Principles are described. 11 refs.

Menlove, F.L.

1991-01-01

451

Decommissioning the UHTREX Reactor Facility at Los Alamos, New Mexico  

SciTech Connect

The Ultra-High Temperature Reactor Experiment (UHTREX) facility was constructed in the late 1960s to advance high-temperature and gas-cooled reactor technology. The 3-MW reactor was graphite moderated and helium cooled and used 93% enriched uranium as its fuel. The reactor was run for approximately one year and was shut down in February 1970. The decommissioning of the facility involved removing the reactor and its associated components. This document details planning for the decommissioning operations which included characterizing the facility, estimating the costs of decommissioning, preparing environmental documentation, establishing a system to track costs and work progress, and preplanning to correct health and safety concerns in the facility. Work to decommission the facility began in 1988 and was completed in September 1990 at a cost of $2.9 million. The facility was released to Department of Energy for other uses in its Los Alamos program.

Salazar, M.; Elder, J.

1992-08-01

452

A data automation system at Los Alamos National Laboratory.  

SciTech Connect

Idaho National Engineering and Environmental Laboratory (INEEL) has developed an automated computer program, Data Review Expert System (DRXS), for reviewing nondestructive assay (NDA) data. DRXS significantly reduces the data review time needed to meet characterization requirements for the Waste Isolation Pilot Plant (WIPP). Los Alamos National Laboratory (LANL) is in the process of developing a computer program, Software System Logic for Intelligent Certification (SSLIC), to automate other tasks associa ted with characterization of Transuranic Waste (TRU) samples. LANL has incorporated a version of DRXS specific to LANL's isotopic data into SSLIC. This version of SSLIC was audited by the National Transuranic Program on October, 24, 2001. This paper will present the results of the audit, and discuss future plans for SSLIC including the integration on the INEELLANL developed Rule Editor.

Betts, S. E. (Stephen E.); Schneider, C. M. (Connie M.); Pickrell, M. M. (Mark Manley)

2001-01-01

453

HELIOS: applications at the Los Alamos National Laboratory  

SciTech Connect

The Los Alamos National Laboratory (LANL) is involved in the analysis of many different types of nuclear systems. The nuclear systems that we have analyzed have included subcritical accelerator driven systems for the transmutation of waste, fusion systems, critical experiment systems, and space propulsion and power systems. We have also analyzed special purpose reactors such as the LANL Omega West reactor, production reactors, and conventional commercial light- and heavy-water reactors. Thus the systems that we analyze and the type of results desired, often vary considerably from those of a power company normally analyzing their PWR or BWR for fissile fuel burnup and production. The reactor geometries that we model are often quite complicated such as those of an RBMK or Savannah River Production Reactor. Rather than fissile fuel production and burnup, the goal of a calculation could be the production rate of some obscure isotope which has medical applications.

Perry, R.T.; Mosteller, R.D.; Chodak, Paul III [Los Alamos National Lab., NM (United States); Charlton, W. [Texas A and M University, College Station, TX (United States); Adams, B.T. [Delft University of Technology, Delft (Netherlands)

1997-10-01

454

Status of the ICF program at Los Alamos National Laboratory  

SciTech Connect

In the Los Alamos program we are emphasizing the testing of targets uniquely designed for drive with the carbon dioxide (CO/sub 2/) laser. The two major facilities for this study are the eight-beam Helios system and the Antares laser system. Some recent results to be discussed demonstrate the dominant effect of self-generated magnetic fields in controlling energy transport by hot electrons. An understanding of this physics may permit the design of targets for CO/sub 2/ that are self-shielding in terms of hot electron preheat. Another consequence of the magnetic insulation is efficient energy conversion to ion motion. This occurs over a much largr surface than originally irradiated by the laser with in excess of 50 percent of the absorbed energy converted to ion motion in some experiments.

Rockwood, S.D.

1982-01-01

455

The Laser Safety Program at Los Alamos National Laboratory  

SciTech Connect

The Laser Safety Program at the Los Alamos National Laboratory was formalized in April, 1991, with the publication of a document, {open_quotes}Lasers,{close_quotes} modeled on the ANSIZ136.1 standard. This program has received such wide acceptance by the laser community and line managers that the original Laser Safety Program document has become a Laboratory standard on lasers. As a benchmark of the success of this program is that the Laboratory has experienced no disabling eye injuries because of laser operations since July, 1990, to be compared with a disabling laser eye injury that used to average one every eighteen months prior to the time the formal program was established. The Laboratory Laser Safety Program and program elements will be presented and discussed.

Hyer, R.

1997-02-01

456

Tiger Team Assessment of the Los Alamos National Laboratory  

SciTech Connect

The Management Subteam conducted a management and organization assessment of environment, safety, and health (ES H) activities performed by the Los Alamos National Laboratory (LANL) and onsite contractor personnel. The objectives of the assessment were to (1) evaluate the effectiveness of management systems and practices in terms of ensuring environmental compliance and the safety and health of workers and the general public, (2) identify key findings, and (3) identify root causes for all ES H findings and concerns. The scope of the assessment included examinations of the following from an ES H perspective: (1) strategic and program planning; (2) organizational structure and management configuration; (3) human resource management, including training and staffing; (4) management systems, including performance monitoring and assessment; (5) conduct of operations; (6) public and institutional interactions; and (7) corporate'' parent support.

Not Available

1991-11-01

457

XUV free-electron laser development at Los Alamos  

SciTech Connect

Free-electron lasers (FELs) for the vacuum-ultraviolet and soft x-ray spectral regions (together termed the XUV) are being designed at Los Alamos for integration into a future national UV/XUV FEL user facility for scientific experimentation. As proposed, this facility would consist of a sequence of up to 15 FEL oscillators and amplifiers, driven by a single, rf-linear accelerator, that will generate broadly tunable, picosecond-pulse, coherent radiation over the range from 1 to 400 nm. Below 300 nm, the peak- and average-power output of these FEL devices should surpass the capabilities of any existing, continuously tunable photon sources by many orders-of-magnitude. We describe the design parameters and predicted output of these FELs and make comparison with synchrotron radiation sources. Brief mention is given to our recent progress in developing the three primary components (electron beam, magnetic undulator, and resonator mirrors). 30 refs., 2 figs., 3 tabs.

Newnam, B.E.

1988-01-01

458

Acceleration of Los Alamos National Laboratory transuranic waste disposition  

SciTech Connect

One of Los Alamos National Laboratory's (LANL's) most significant risks is the site's inventory of transuranic waste retrievably stored above and below-ground in Technical Area (TA) 54 Area G, particularly the dispersible high-activity waste stored above-ground in deteriorating facilities. The high activity waste represents approximately 50% (by activity) of the total 292,000 PE-Ci inventory remaining to be disposed. The transuranic waste inventory includes contact-handled and remote-handled waste packaged in drums, boxes, and oversized containers which are retrievably stored both above and below-ground. Although currently managed as transuranic waste, some of the inventory is low-level waste that can be disposed onsite or at approved offsite facilities. Dis-positioning the transuranic waste inventory requires retrieval of the containers from above and below- ground storage, examination and repackaging or remediation as necessary, characterization, certification and loading for shipment to the Waste Isolation Pilot Plant in Carlsbad, New Mexico, all in accordance with well-defined requirements and controls. Although operations are established to process and characterize the lower-activity contact-handled transuranic waste containers, LANL does not currently have the capability to repack high activity contact-handled transuranic waste containers (> 56 PE-Ci) or to process oversized containers with activity levels over 0.52 PE-Ci. Operational issues and compliance requirements have resulted in less than optimal processing capabilities for lower activity contact-handled transuranic waste containers, limiting preparation and reducing dependability of shipments to the Waste Isolation Pilot Plant. Since becoming the Los Alamos National Laboratory contractor in June 2006, Los Alamos National Security (LANS) L.L.C. has developed a comprehensive, integrated plan to effectively and efficiently disposition the transuranic waste inventory, working in concert with the Department of Energy Los Alamos Site Office, Carlsbad Field Office and the Department of Energy Headquarters. Rather than simply processing containers as retrieved, the plan places priority on efficient curie disposition, a direct correlation to reducing risk. Key elements of the approach include balancing inventory and operational risks, tailoring methods to meet requirements, optimizing existing facilities, equipment and staff, and incorporating best practices from other Department of Energy sites. With sufficient funding this will enable LANL to ship the above-ground high activity contact-handled transuranic waste offsite by the end of Fiscal Year (FY) 2007 and to disposition the remaining above- and below-ground contact-handled and remote-handled transuranic waste inventory by December 2010. Nearly 70% of the contact-handled transuranic waste containers, including the high activity waste, require processing and repackaging before characterization and certification for shipment to the Waste Isolation Pilot Plant. LANL is employing a balanced risk approach that accomplishes significant long-term risk reduction by accepting short-term increased facility operations risk under well-developed and justified interim controls. Reviews of facility conditions and additional analyses show that the Waste Characterization, Reduction and Repackaging Facility and the Radioassay and Nondestructive Testing Facility are the most appropriate facilities to safely remediate, repackage, and ship lower activity and the remaining high activity drums. Updated safety documentation supporting limited Hazard Category 2 operations in these facilities has been developed. Once approved, limited-term operations to process the high activity drums can begin in early 2007, building upon the experience base established performing Hazard Category 3 operations processing lower activity waste in these facilities. LANL is also implementing a series of actions to improve and sustain operations for processing contact-handled transuranic waste inventory. Building 412 Decontamination and Volume Reduction Fa

O'Leary, G.A.; Palmer, B.A.; Starke, T.P.; Phelps, A.K. [Los Alamos National Security, L.L.C., Los Alamos National Laboratory, Los Alamos, NM (United States)

2007-07-01

459

SurveyLA: Los Angeles Historic Resources Survey  

NSDL National Science Digital Library

If you mention "historic preservation" and "Los Angeles" in the same sentence, some people might raise their eyebrows. The City of Angeles has constantly reinvented itself during its relatively brief existence, and much of the city's urban fabric has been chewed up by bulldozers and ambitious developers over the past several decades. However, the J. Paul Getty Trust is providing financial backing for the very exciting and ambitious project known as "SurveyLA". The intent of SurveyLa is to complete a citywide survey that will identify and document historic resources representing significant themes in the city's history. Visitors to the site can learn about the survey's methods, read a FAQ section, and also locate historic properties. It's a very well-done website, and it's one that other historic preservation officials and persons with an interest in such matters may want to consult as they think about their own efforts in this area.

2008-01-01

460

The legacy and future of CFD at Los Alamos  

SciTech Connect

The early history is presented of the prolific development of CFD methods in the Fluid Dynamics Group (T-3) at Los Alamos National Laboratory in the years from 1958 to the late 1960`s. Many of the currently used numerical methods--PIC, MAC, vorticity-stream-function, ICE, ALE methods and the {kappa}-{var_epsilon} method for turbulence--originated during this time. The rest of the paper summarizes the current research in T-3 for CFD, turbulence and solids modeling. The research areas include reactive flows, multimaterial flows, multiphase flows and flows with spatial discontinuities. Also summarized are modern particle methods and techniques developed for large scale computing on massively parallel computing platforms and distributed processors.

Johnson, N.L. [Los Alamos National Lab., NM (United States). Theoretical Div.

1996-06-01

461

Environmental surveillance and compliance at Los Alamos during 1996  

SciTech Connect

This report presents environmental data that characterize environmental performance and addresses compliance with environmental standards and requirements at Los Alamos National Laboratory (LANL or the Laboratory) during 1996. The Laboratory routinely monitors for radiation and for radioactive nonradioactive materials at Laboratory sites as well as in the surrounding region. LANL uses the monitoring results to determine compliance with appropriate standards and to identify potentially undesirable trends. Data were collected in 1996 to assess external penetrating radiation; quantities of airborne emissions; and concentrations of chemicals and radionuclides in ambient air, surface waters and groundwaters, the municipal water supply, soils and sediments, and foodstuffs. Using comparisons with standards and regulations, this report concludes that environmental effects from Laboratory operations are small and do not pose a demonstrable threat to the public, Laboratory employees, or the environment. Laboratory operations were in compliance with all major environmental regulations.

NONE

1997-09-01

462

Online microfilm recorders at Los Alamos National Laboratory  

SciTech Connect

The Los Alamos Computing Division has developed a satellite graphics output station (PAGES). This station accepts user requests for output through a large computer network (the ICN). The system orders these requests and schedules output on one of several devices consistent with the user's request and the overall job turnaround requirements of the Laboratory. The system translates a standard Metafile into a device-specific format and efficiently generates the requested output. At the same time, PAGES provides some graphics processing, previously provided by the large supercomputers. The system provides current information on queues, jobs being processed, and the devices. An effective quality control program is an integral part of the system design. This system should continue to reduce user interface changes, hold down operating cost, make effective use of supercomputer time, and produce quality output. 10 figures, 1 table.

Wolf, R.

1981-01-01

463

Nucleon Form Factors  

SciTech Connect

A review of data on the nucleon electro-weak form factors in the space-like region is presented. Recent results from experiments using polarized beams and either polarized targets or nucleon recoil polarimeters have yielded a significant improvement on the precision of the electromagnetic data obtained with the traditional Rosenbluth separation. An outlook is presented of planned experiments.

Kees de Jager

2002-10-01

464

Recombinant factor VIIa.  

PubMed

Human coagulation factor (F) VII is a single chain protease that circulates in the blood as a weakly active zymogen at concentrations of approximately 10 nmol/L. When converted to the active 2 chain form (FVIIa), it is a powerful initiator of haemostasis. Recombinant factor VIIa (rFVIIa, eptacog alfa, NovoSeven) is a genetically engineered product that was first introduced in 1988 for the treatment of patients with haemophilia A and B with high inhibitory antibody titres to factors VIII and IX. Recent reports in the form of case studies and series, and early trial data, have suggested a role for rFVIIa across a diverse range of indications including bleeding associated with trauma, surgery, thrombocytopaenia, liver disease and oral anticoagulant toxicity. This review describes the physiology of the coagulation pathway and in particular the role of recombinant factor VIIa. It will also focus on the emerging role of rFVIIa in both trauma and non-trauma bleeding and its potential use in the ED. PMID:15537408

Aitken, Michael G

2004-01-01

465

Sudakov factorization and resummation  

Microsoft Academic Search

We present a unified derivation of the resummation of Sudakov logarithms, directly from the factorization properties of cross sections in which they occur. We rederive in this manner the well-known exponentiation of leading and non-leading logarithmic enhancements near the edge of phase space for cross sections such as deeply inelastic scattering, which are induced by an electroweak hard scattering. The

Harry Contopanagos; Eric Laenen; George Sterman

1997-01-01

466

Sudakov factorization and resummation  

Microsoft Academic Search

We present a unified derivation of the resummation of Sudakov logarithms, directly from the factorization properties of cross sections in which they occur. We rederive in this manner the well-known exponentiation of leading and nonleading logarithmic enhancements near the edge of phase space for cross sections such as deeply inelastic scattering, which are induced by an electroweak hard scattering. For

H F Contopanagos; Eric Laenen; George F Sterman

1996-01-01

467

Factor Trail Game  

NSDL National Science Digital Library

In this math game, learners identify the factors of a number to earn points. Although practicing a mundane skill, learners enjoy the work because of the game scenario. Built into this game is cooperative learning--learners check one another's work before points are awarded. This lesson guide includes questions for learners, assessment options, extensions, and reflection questions.

2008-01-01

468

Limiting Factors in Ecosystems  

NSDL National Science Digital Library

The purpose of this resource is to understand that physical factors - temperature and precipitation - limit the growth of vegetative ecosystems. Students observe and record seasonal changes in their local study site. They establish that these phenomena follow annual cycles and conclude the activity by creating displays that illustrate the repeating pattern associated with the appearance and disappearance of seasonal markers.

The GLOBE Program, University Corporation for Atmospheric Research (UCAR)

2003-08-01

469

Scale Factor X  

NSDL National Science Digital Library

In this game, students navigate a maze to get to a math challenge. The three challenges are: move blue and green "fuel cells" around to match the ratios in the given containers; measure shapes to determine the scale factors needed to make them match the given templates; determine how to place bases on a map based on clues involving proportions.

2010-01-01

470

Wolf Limiting Factors  

NSDL National Science Digital Library

In this activity, learners simulate a wolf and its habitat and observe what happens when the limiting factors change over time. This activity is designed for large groups of learners, but would work with smaller groups of at least 12 learners. Use this activity to discuss predator/prey relationships, habitats, and fluctuations in animal populations.

Eduweb; Zoo, Minnesota

2012-01-01

471

Transcription factors in autoimmunity  

Microsoft Academic Search

The identification of two transcription factors that, when mutated, are responsible for severe autoimmune disease in humans is leading to a better understanding of the fundamental processes involved in T-cell tolerance. Both AIRE and FOXP3, identified initially via their association with genetically manipulated mice, are critically involved in tolerance induction in humans. Although mutations in these genes may cause rare

Fred Ramsdell; Steven F Ziegler

2003-01-01

472

Assessment of Human Factors  

NASA Technical Reports Server (NTRS)

Human Factors Engineering, often referred to as Ergonomics, is a science that applies a detailed understanding of human characteristics, capabilities, and limitations to the design, evaluation, and operation of environments, tools, and systems for work and daily living. Human Factors is the investigation, design, and evaluation of equipment, techniques, procedures, facilities, and human interfaces, and encompasses all aspects of human activity from manual labor to mental processing and leisure time enjoyments. In spaceflight applications, human factors engineering seeks to: (1) ensure that a task can be accomplished, (2) maintain productivity during spaceflight, and (3) ensure the habitability of the pressurized living areas. DSO 904 served as a vehicle for the verification and elucidation of human factors principles and tools in the microgravity environment. Over six flights, twelve topics were investigated. This study documented the strengths and limitations of human operators in a complex, multifaceted, and unique environment. By focusing on the man-machine interface in space flight activities, it was determined which designs allow astronauts to be optimally productive during valuable and costly space flights. Among the most promising areas of inquiry were procedures, tools, habitat, environmental conditions, tasking, work load, flexibility, and individual control over work.

Mount, Frances; Foley, Tico

1999-01-01

473

BRBF response modification factor  

Microsoft Academic Search

In this paper, overstrength, ductility and response modification factor of Buckling Restrained Braced frames were evaluated. To do so, buildings with various stories and different bracing configuration including diagonal, split X, chevron (V and Inverted V) bracings were considered. Static pushover analysis, nonlinear incremental dynamic analysis and linear dynamic analysis have been performed using Opensees software. The effects of some

B. Asgarian; H. R. Shokrgozar

2009-01-01

474

Brain Tumor Risk Factors  

MedlinePLUS

... environmental factors—cured food consumption (nitrites), cigarette smoking, cell phone use, and residential power line exposure, for example— ... associated with changes in the chromosomes. Each normal cell in any human body has 23 pairs of ... Phone: 773-577-8750 Fax: 773-577-8738 CareLine: ...

475

Climate Change and Adaptation Planning on the Los Angeles Aqueduct  

NASA Astrophysics Data System (ADS)

This study provides an assessment of the potential impacts of climate change on the Eastern Sierra Nevada snowpack and snowmelt timing, using a combination of empirical (i.e., data-based) models, and computer simulation models forced by GCM-projected 21st century climatology (IPCC 2007 AR4 projections). Precipitation from the Eastern Sierra Nevada is one of the main water sources for Los Angeles' more than 4 million people - a source whose future availability is critical to the city's growing population and large economy. Precipitation in the region falls mostly in winter and is stored in the large natural reservoir that is the snowpack. Meltwater from the Eastern Sierra is delivered to the city by the 340-mile long Los Angeles Aqueducts. The analysis is focused on the nature of the impact to the LAA water supplies over the 21st century due to potential climate change, including volume of precipitation, the mix of snowfall and rainfall, shifts in the timing of runoff, interannual variability and multi-year droughts. These impacts further affect the adequacy of seasonal and annual carryover water storage, and potentially water treatment. Most of the snow in the 10,000 km^2 Mono-Owens basins that feed the LAA occurs in a relatively narrow, 10-20 km wide, high-elevation band on the steep slopes of 20 smaller basins whose streams drain into the Owens River and thence LAA. Extending over 240 km in the north-south direction, these basins present special challenges for estimating snowpack amounts and downscaling climate-model data. In addition, there are few meteorological stations and snow measurements in the snow-producing parts of the basins to drive physically based hydrologic modeling.

Roy, S. B.; Bales, R. C.; Costa-Cabral, M. C.; Chen, L.; Maurer, E. P.; Miller, N. L.; Mills, W. B.

2009-12-01

476

SNM holdup assessment of Los Alamos exhaust ducts. Final report  

SciTech Connect

Fissile material holdup in glovebox and fume hood exhaust ducting has been quantified for all Los Alamos duct systems. Gamma-based, nondestructive measurements were used to quantify holdup. The measurements were performed during three measurement campaigns. The first campaign, Phase I, provided foot-by-foot, semiquantitative measurement data on all ducting. These data were used to identify ducting that required more accurate (quantitative) measurement. Of the 280 duct systems receiving Phase I measurements, 262 indicated less than 50 g of fissile holdup and 19 indicated fissile holdup of 50 or more grams. Seven duct systems were measured in a second campaign, called Series 1, Phase II. Holdup estimates on these ducts ranged from 421 g of {sup 235}U in a duct servicing a shut-down uranium-machining facility to 39 g of {sup 239}Pu in a duct servicing an active plutonium-processing facility. Measurements performed in the second campaign proved excessively laborious, so a third campaign was initiated that used more efficient instrumentation at some sacrifice in measurement quality. Holdup estimates for the 12 duct systems measured during this third campaign ranged from 70 g of {sup 235}U in a duct servicing analytical laboratories to 1 g of {sup 235}U and 1 g of {sup 239}Pu in a duct carrying exhaust air to a remote filter building. These quantitative holdup estimates support the conclusion made at the completion of the Phase I measurements that only ducts servicing shut-down uranium operations contain about 400 g of fissile holdup. No ventilation ducts at Los Alamos contain sufficient fissile material holdup to present a criticality safety concern.

Marshall, R.S.

1994-02-01

477

Public health impact of the 1992 Los Angeles civil unrest.  

PubMed Central

The Los Angeles civil unrest in April 1992 stunned the nation. The days of violence resulted in 53 deaths, 2,325 reported injuries, more than 600 buildings completely destroyed by fire, and approximately $735 million in total damages. The purpose of this paper is to give an overview of the activities of the Public Health Programs and Services Branch of the Los Angeles County Department of Health Services during and after the civil unrest and to illustrate the types of public health issues and problems that may result from large-scale civil disturbance. Public health agencies and jurisdictions should consider these issues in their disaster planning. Public Health Programs and Services Branch activities were directly affected by the violence and destruction. Women, Infants and Children Program vouchering sites and 20 drug program and alcohol recovery sites were damaged or burned and 15 county health centers closed during the unrest. At least 38 private medical and dental offices and 45 pharmacies were destroyed or damaged. County health authorities offered facilities to house relocated private care providers and filled prescriptions for medications where needed. The environmental health impact required the inspection of 2,827 burned and damaged sites for hazardous waste including asbestos; at 9 percent of the inspected sites, waste required special disposal. More than 1,000 food facilities suffered damage and required inspection before reopening. In the 3 months following the unrest, a 20-percent increase in disposal capacity was authorized at four county landfills to accommodate the disposal of debris. Violence was a public health issue of particular concern.(ABSTRACT TRUNCATED AT 250 WORDS)

Evans, C A

1993-01-01

478

On the Sources of Methane to the Los Angeles Atmosphere  

NASA Technical Reports Server (NTRS)

We use historical and new atmospheric trace gas observations to refine the estimated source of methane (CH4) emitted into California's South Coast Air Basin (the larger Los Angeles metropolitan region). Referenced to the California Air Resources Board (CARB) CO emissions inventory, total CH4 emissions are 0.44 +/- 0.15 Tg each year. To investigate the possible contribution of fossil fuel emissions, we use ambient air observations of methane (CH4), ethane (C2H6), and carbon monoxide (CO), together with measured C2H6 to CH4 enhancement ratios in the Los Angeles natural gas supply. The observed atmospheric C2H6 to CH4 ratio during the ARCTAS (2008) and CalNex (2010) aircraft campaigns is similar to the ratio of these gases in the natural gas supplied to the basin during both these campaigns. Thus, at the upper limit (assuming that the only major source of atmospheric C2H6 is fugitive emissions from the natural gas infrastructure) these data are consistent with the attribution of most (0.39 +/- 0.15 Tg yr-1) of the excess CH4 in the basin to uncombusted losses from the natural gas system (approximately 2.5-6% of natural gas delivered to basin customers). However, there are other sources of C2H6 in the region. In particular, emissions of C2H6 (and CH4) from natural gas seeps as well as those associated with petroleum production, both of which are poorly known, will reduce the inferred contribution of the natural gas infrastructure to the total CH4 emissions, potentially significantly. This study highlights both the value and challenges associated with the use of ethane as a tracer for fugitive emissions from the natural gas production and distribution system.

Wennberg, Paul O.; Mui, Wilton; Fischer, Marc L.; Wunch, Debra; Kort, Eric A.; Blake, Donald R.; Atlas, Elliot L.; Santoni, Gregory W.; Wofsy, Steven C.; Diskin, Glenn S.; Jeong, Seongeun

2012-01-01

479

Postpartum depression in mothers of infants in neonatal intensive care unit: risk factors and management strategies.  

PubMed

Objective?The aim of this study is to assess incidence, risk factors, and management strategies for Postpartum depression (PPD) in mothers of neonatal intensive care unit (NICU) infants. Study Design?A total of 131 mothers completed the study assessment tool (Edinburgh Postnatal Depression Scale with additional questions). Score of 10 or above was considered to indicate risk for PPD (subclinical depression). Risk factors were examined with particular emphasis on length of stay (LOS). Results?Approximately 19.1% of mothers experienced (subclinical) PPD. Depression during current and previous pregnancy, and problems with current delivery were strong predicting risk factors for PPD. As the LOS increased beyond 2 weeks, the odds of PPD risks initially increased, then leveled off, and then decreased after 31 days. Conclusion?We recommend that the mothers of NICU infants be routinely screened for PPD and aggressively treated. PMID:23918522

Vasa, Rohitkumar; Eldeirawi, Kamal; Kuriakose, Vipin George; Nair G, Jijo; Newsom, Carol; Bates, Joanne

2014-05-01

480

Personal Social Network Factors Associated with Overdose Prevention Training Participation  

PubMed Central

We investigated social network factors associated with participation in overdose prevention training among injection drug users (IDUs). From 2008-2010, 106 IDUs who had witnessed an overdose in the past year from two syringe exchange programs in Los Angeles provided data on: overdose prevention training status (trained vs. untrained), social networks, history of overdose, and demographics. In multivariate logistic regression, naming at least one network member who had been trained in overdose prevention was significantly associated with being trained (Adjusted Odds Ratio 3.25, 95% Confidence Interval 1.09, 9.68). Using social network approaches may help increase training participation. Limitations are noted.

Iverson, Ellen; Wong, Carolyn F.; Jackson-Bloom, Jennifer; McNeeley, Miles; Davidson, Peter J.; McCarty, Christopher; Kral, Alex H.; Lankenau, Stephen E.

2013-01-01

481

Continuous air monitor correlation to fixed air sample data at Los Alamos National Laboratory  

SciTech Connect

Continuous air monitoring instruments (CAMS) deployed in laboratories in the TA-55 plutonium facility at Los Alamos National Laboratory (LANL) alarmed less than 33 percent of the time when fixed air sample measurements in the same laboratory showed integrated concentrations exceeding 500 DAC-hrs. The purpose of this study was to explore effects of non-instrument variables on alarm sensitivities for properly working CAMS. Non-instrument variables include air flow patterns, particle size of released material, and the energy of the release. Dilution Factors (DFs) for 21 airborne releases in various rooms and of different magnitudes were calculated and compared. The median DF for releases where the CAM alarmed was 13.1 while the median DF for releases where the CAM did not alarm was 179. Particle sizes ranged considerably with many particles larger than 10 {mu}m. The cause of the release was found to be important in predicting if a CAM would alarm with releases from bagouts resulting in the greatest percentage of CAM alarms. The results of this study suggest that a two-component strategy for CAM placement at LANL be utilized. The first component would require CAMs at exhaust points in the rooms to provide for reliable detection for random release locations. The second component would require placing CAMs at locations where releases have historically been seen. Finally, improvements in CAM instrumentation is needed.

Whicker, J.J.

1993-05-01

482

Asthma and air pollution in the Los Angeles area. Technical report No. 35  

SciTech Connect

Daily asthma attack diaries of sixteen panels of asthmatics residing in the Los Angeles area were collected by the Environmental Protection Agency for 34 week periods during the years 1972 to 1975. These data are examined here for the relationship between daily attack occurrence and daily levels of photochemical oxidant, total suspended particulates, minimum temperature, relative humidity, and average wind speed. A separate multiple logistic regression is used for each panelist's attack data. Variables representing the presence or absence of attack on the preceding day, as well as day of week and time since the start of the study, are included in the regressions. The most significant predictor of attacks was the presence of an attack on the preceding day. On the average, the panelists tended to have increased attacks on days with high oxidant and particulate pollution, on cool days, and during the first two months of the study. Panelists' attack propensity also differed by day of week; in particular they had more attacks on Saturdays (the last day of the weekly reporting period) than on Sundays. Each panelist's regression coefficients are classified according to his age, sex, hay fever status and self-assessed attack precursors; this classification is used to examine subgroups among the panelists with high coefficients corresponding to the above factors.

Whittemore, A S; Korn, E L

1980-03-01

483

Micronuclei Induction in Human Fibroblasts Exposed In Vitro to Los Alamos High-Energy Neutrons  

NASA Technical Reports Server (NTRS)

High-energy secondary neutrons, produced by the interaction of galactic cosmic rays with the atmosphere, spacecraft structure and planetary surfaces, contribute to a significant fraction to the dose equivalent in crew members and passengers during commercial aviation travel, and astronauts in space missions. The Los Alamos Nuclear Science Center (LANSCE) neutron facility#s ICE House 30L beamline is known to generate neutrons that simulate the secondary neutron spectra of earth#s atmosphere. The neutron spectrum is also similar to that measured onboard spacecraft like the MIR and International Space Station (ISS). To evaluate the biological damage, we exposed human fibroblasts in vitro to the LANSCE neutron beams without degrader at an entrance dose rate of 25 mGy/hr and analyzed the micronuclei (MN) induction. The cells were also placed behind a 9.9 cm water column to study effect of shielding in the protection of neutron induced damages. It was found that the dose response in the MN frequency was linear for the samples with and without shielding and the slope of the MN yield behind the shielding was reduced by a factor of 3.5. Compared to the MN induction in human fibroblasts exposed to a gamma source at a low dose rate, the RBE was found to be 16.7 and 10.0 for the neutrons without and with 9.9 cm water shielding, respectively.

Gersey, Brad; Sodolak, John; Hada, Megumi; Saganti, Prem; Wilkins, Richard; Cucinotta, Francis; Wu, Honglu

2006-01-01

484

Loss estimates for a Puente Hills blind-thrust earthquake in Los Angeles, California  

USGS Publications Warehouse

Based on OpenSHA and HAZUS-MH, we present loss estimates for an earthquake rupture on the recently identified Puente Hills blind-thrust fault beneath Los Angeles. Given a range of possible magnitudes and ground motion models, and presuming a full fault rupture, we estimate the total economic loss to be between $82 and $252 billion. This range is not only considerably higher than a previous estimate of $69 billion, but also implies the event would be the costliest disaster in U.S. history. The analysis has also provided the following predictions: 3,000-18,000 fatalities, 142,000-735,000 displaced households, 42,000-211,000 in need of short-term public shelter, and 30,000-99,000 tons of debris generated. Finally, we show that the choice of ground motion model can be more influential than the earthquake magnitude, and that reducing this epistemic uncertainty (e.g., via model improvement and/or rejection) could reduce the uncertainty of the loss estimates by up to a factor of two. We note that a full Puente Hills fault rupture is a rare event (once every ???3,000 years), and that other seismic sources pose significant risk as well. ?? 2005, Earthquake Engineering Research Institute.

Field, E. H.; Seligson, H. A.; Gupta, N.; Gupta, V.; Jordan, T. H.; Campbell, K. W.

2005-01-01

485

The HIV Risk Reduction Needs of Homeless Women in Los Angeles  

PubMed Central

Background Substance use, housing instability, and transactional sex all contribute to HIV risk engagement among homeless women. Because of the increased risk of HIV among homeless women, this study sought to understand the context of sexual behaviors and condom use among homeless women and elucidate modifiable factors that can be targeted by interventions. Methods Homeless women (n = 45) participated in focus groups (n = 6) at shelters throughout Los Angeles County. Thematic analyses revealed that similar to other high-risk women, homeless women engage in sex with multiple types of partners (steady, casual, and transactional). Findings Our findings indicate that, similar to use among other high-risk women, condom use by homeless women varied by type of partner. Substance use also contributed to condom non-use. In a departure from previous research, homeless women reported overarching feelings of hopelessness. Participants spoke of hopelessness contributing to risk engagement, specifically the number of ongoing stressors experienced because of homelessness contributing to despair. Without acknowledgement of this unique quality of homelessness, women felt their risk reduction needs would never truly be understood. Conclusions Interventions involving homeless women should include self-esteem building, acknowledgment and use of inherent resilience qualities gained during homelessness, respect for current knowledge and skills, and an exploration of when women choose to trust their partners and how they make safer sex choices.

Cederbaum, Julie A.; Wenzel, Suzanne L.; Gilbert, Mary Lou; Chereji, Elizabeth

2013-01-01

486

FACTORS INFLUENCING THE DESIGN OF BIOACCUMULATION FACTOR AND BIOTA-SEDIMENT ACCUMULATION FACTOR FIELD STUDIES  

EPA Science Inventory

A series of modeling simulations were performed to develop an understanding of the underlying factors and principles involved in developing field sampling designs for measuring bioaccumulation factors (BAFs) and biota-sediment accumulation factors (BSAFs. These simulations reveal...

487

FACTORS INFLUENCING THE DESIGN OF BIOACCUMULATION FACTOR AND BIOTA-SEDIMENT ACCUMULATION FACTOR FIELD STUDIES  

EPA Science Inventory

General guidance for designing field studies to measure bioaccumulation factors (BAFs) and biota-sediment accumulation factors (BSAFs) is not available. To develop such guidance, a series of modeling simulations were performed to evaluate the underlying factors and principles th...

488

Retinal Microvascular Abnormalities and Cognitive Function in Latino Adults in Los Angeles  

PubMed Central

Purpose Retinal vessels may provide a readily accessible surrogate approach to study vascular disease in brain small vessels. Previous epidemiologic studies of retinal microvascular abnormalities and cognition have not included large numbers of Latinos who have a high prevalence of diabetes and hypertension. Methods We used data from 809 elderly Latino participants in the Los Angeles Latino Eye Study (LALES) to assess whether retinal vessel caliber and microvascular abnormalities are cross-sectionally associated with lower cognitive function. Cognitive screening was conducted with the Cognitive Abilities Screening Instrument-Short form (CASI-S) and in-depth testing with the Spanish English Neuropsychological Assessment Scales (SENAS). Retinal photographs were used to identify retinopathy signs and measure retinal vessel caliber. Results A total of 65.8% had high blood pressure, 34.5% had diabetes; self-reported diagnoses of heart attack, heart failure, angina and stroke were rare. Retinal calibers and any retinopathy were not associated with the CASI-S, total SENAS or any SENAS cognitive factors assessed as continuous variables. The odds of a low CASI-S score were two times higher in subjects with generalized arteriolar narrowing (OR = 2.04, 95% CI = 1.14, 3.66), and one and half times as high in those with both generalized arteriolar narrowing and retinopathy signs (OR = 1.49, 95% CI = 0.47, 4.75) though this result was based on only four cases with both risk factors and confidence limits were wide and included the null. Conclusion Retinal microvasculature imaging may provide insights into small blood vessel influences on cognition in Latino populations. Additional studies in diverse populations and prospective settings are needed.

Gatto, Nicole M.; Varma, Rohit; Torres, Mina; Wong, Tien Y.; Johnson, Pam L.; Segal-Gidan, Freddi; Mack, Wendy J.

2013-01-01

489

Epidemic Salmonella enteritidis infection in Los Angeles County, California. The predominance of phage type 4.  

PubMed Central

Between April and July 1994, 501 cases of Salmonella enteritidis infection were reported in Los Angeles County, California, nearly 5 times the number reported between April and July 1993; of these, 422 (84%) were sporadic (not related to known outbreaks). A case-control study was done to determine risk factors for sporadic illness; the distribution of S enteritidis phage types was evaluated. Case-patients (n = 58) were county residents older than 1 year with culture-confirmed S enteritidis infection in August 1994. One to two acquaintance controls (n = 98) were matched to each case by age, sex, and race. Two risk factors-eating raw or undercooked eggs (matched odds ratio [MOR] = 6.6; 95% confidence interval [CI] = 1.9, 23.0) and eating in restaurants (MOR = 4.9; 95% CI = 1.2, 19.4) in the 3 days before the onset of illness-remained significant in the conditional logistic regression model. Of 16 randomly selected S enteritidis case-isolates, 15 (94%) were phage type 4. The reasons for the regional predominance of phage type 4, an S enteritidis subtype recently associated with large and destructive increases in salmonellosis among poultry and humans in Britain and much of Europe, are unclear. To minimize human S enteritidis infection, food service workers need frequent training in the proper handling of raw foods, eggs should be kept refrigerated during distribution and storage, and eggs should be cooked until the yolk is firm, particularly for persons at the greatest risk for serious illness: pregnant women, elderly persons, and those with compromised immune systems. Clinicians should obtain stool specimens for culture from patients who present with diarrhea and fever or bloody diarrhea or who are possibly part of an outbreak.

Passaro, D J; Reporter, R; Mascola, L; Kilman, L; Malcolm, G B; Rolka, H; Werner, S B; Vugia, D J

1996-01-01

490

NEPA and NHPA- successful decommissioning of historic Manhattan Project properties at Los Alamos National Laboratory, Los Alamos, New Mexico  

SciTech Connect

This paper describes experiences at Los Alamos National Laboratory during the process of planning and executing decommissioning and decontamination activities on a number of properties constructed as part of the Manhattan project. Many of these buildings had been abandoned for many years and were in deteriorating condition, in addition to being contaminated with asbestos, lead based paints and high explosive residues. Due to the age and use of the structures they were evaluated against criteria for the National Register of Historic Places. This process is briefly reviewed, along with the results, as well as actions implemented as a result of the condition and safety of the structures. A number of the structures have been decontaminated and demolished. Planning is still ongoing for the renovation of one structure, and the photographic and drawing records of the properties is near completion.

McGehee, E.D.; Pendergrass, A.K.

1997-05-21

491

Atomic Scattering Factors  

NSDL National Science Digital Library

From the Lawrence Berkeley Laboratory's Center for X-Ray Optics, these "atomic scattering factors are based upon photoabsorption measurements of elements in their elemental state." These easy-to-use tables allow users to search out atomic scattering factor data by element and look up the x-ray properties of elements, the index of refraction for a compound material, the x-ray attenuation length of a solid, the x-ray transmission of a solid or a gas, and more. Most of the tables are accessed by way of an online query form with variables such as material, density, and photon energy range entered by the user. Most outputs come in plot form for quick viewing, or results may be retrieved as a text or postscript file for use with a personal plotting software.

492

Growth factors for nanobacteria  

NASA Astrophysics Data System (ADS)

Nanobacteria are novel microorganisms recently isolated from fetal bovine serum and blood of cows and humans. These coccoid, gram negative bacteria in alpha-2 subgroup of Proteobacteria grow slowly under mammalian cell culture conditions but not in common media for microbes. Now we have found two different kinds of culture supplement preparations that improve their growth and make them culturable in the classical sense. These are supernatant fractions of conditioned media obtained from 1 - 3 months old nanobacteria cultures and from about a 2 weeks old Bacillus species culture. Both improved multiplication and particle yields and the latter increased their resistance to gentamicin. Nanobacteria cultured with any of the methods shared similar immunological property, structure and protein pattern. The growth supporting factors were heat-stabile and nondialyzable, and dialysis improved the growth promoting action. Nanobacteria formed stony colonies in a bacteriological medium supplemented with the growth factors. This is an implication that nanobacterial growth is influenced by pre-existing bacterial