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Last update: August 15, 2014.
1

Guia para el control y registro de los desechos radiactivos. (Guide for the control and recording of radioactive wastes).  

National Technical Information Service (NTIS)

This guide present the aspects related to the control and recording of radioactive wastes in their points of origin. Then it is of great importance to fulfill these instructions so as to achieve a successful management of radioactive waste. (Atomindex cit...

1987-01-01

2

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

3

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

4

¿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.

5

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

6

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 ...

7

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.

8

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

9

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.

10

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.

11

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

12

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.

13

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

14

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

15

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.

16

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

17

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

18

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

19

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

20

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

21

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

22

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.

23

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

24

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.

25

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

26

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

27

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

28

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.

29

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.

30

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

31

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

32

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

33

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

34

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

35

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

36

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.

37

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

38

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.

39

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

40

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

41

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

42

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

43

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.

44

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

45

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

46

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

47

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...  

48

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

49

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

50

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

51

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

52

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...

53

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...

54

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

55

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

56

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.

57

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

58

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

59

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

60

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

61

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

62

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

63

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

64

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

65

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

66

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

67

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

68

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

69

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

70

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

71

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

72

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

73

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

74

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

75

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

76

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

77

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

78

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

79

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

80

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

81

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

82

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

83

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

84

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

85

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

86

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

87

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

88

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

89

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

90

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.

91

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

92

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

93

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

94

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

95

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.

96

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.

97

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

98

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

99

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

100

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

101

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

102

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

103

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

104

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

105

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

106

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

107

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

108

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.

109

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.

110

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

111

"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

112

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

113

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

114

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

115

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

116

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

117

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

118

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

119

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

120

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

121

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

122

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.

123

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

124

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

125

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

126

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

127

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.

128

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

129

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

130

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

131

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

132

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

133

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

134

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

135

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.

136

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

137

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.

138

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

139

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

140

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

141

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

142

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

143

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

144

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

145

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

146

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...

147

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

148

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

149

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.

150

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

151

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

152

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

153

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.

154

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

155

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

156

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

157

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

158

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

159

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

160

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

161

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

162

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

163

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

164

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

165

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

166

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

167

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.

168

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

169

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

170

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

171

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

172

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

173

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

174

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

175

Tratamiento de desechos radiactivos liquidos de aplicaciones medicas. (Chemical treatment of radioactive liquid wastes from medical applications).  

National Technical Information Service (NTIS)

This work is a study about the treatment of the most important radioactive liquid wastes from medical usages, generated in medical institutions with nuclear medicine services. The radionuclides considered are P-32, S-35, and I-125. The treatments develope...

J. Castillo

1995-01-01

176

Evaluacion de alternativas de eliminacion de residuos radiactivos de alta actividad. (Alternatives evaluation of high activity radioactive wastes disposal).  

National Technical Information Service (NTIS)

Different alternatives considered in the world to be used as barriers to isolate the high level radioactive from the environment wastes produced during the electric energy generation of nuclear origin are presented. Engineering and geologic barriers, are ...

N. R. Ciallella E. J. Petraitis

1989-01-01

177

Sorcion de cobalto radiactivo con sepiolita y con erionita. (Sorption of radioactive cobalt with sepiolite and erionite.).  

National Technical Information Service (NTIS)

sup 60 Co present in aqueous solutions may be sorbed in clays or zeolites. If the solids are suspended in aqueous solutions, the cations of the solids may be exchanged with (sup 60) Co (sup 2+) ions present in the solutions. Natural aluminosilicate are us...

G. Bonifacio

1994-01-01

178

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

179

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

180

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

181

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

182

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

183

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

184

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.

185

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

186

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

187

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

188

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

189

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

190

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

191

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

192

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

193

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

194

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.

195

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

196

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

197

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

198

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

199

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

200

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

201

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

202

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

203

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

204

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

205

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

206

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

207

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.

208

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

209

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

210

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

211

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

212

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

213

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

214

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

215

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

216

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

217

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.

218

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

219

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.

220

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.

221

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

222

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

223

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.

224

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

225

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

226

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

227

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

228

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

229

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

230

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

231

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

232

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

233

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

234

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

235

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

236

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".

237

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

238

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

239

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

240

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

241

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

242

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

243

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

244

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

245

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

246

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

247

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

248

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

249

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

250

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

251

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

252

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

253

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

254

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

255

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

256

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

257

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

258

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

259

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

260

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

261

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

262

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

263

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

264

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

265

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

266

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

267

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

268

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

269

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

270

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

271

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

272

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

273

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

274

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

275

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

276

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

277

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

278

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

279

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

280

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

281

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.

282

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

283

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

284

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

285

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

286

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

287

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

288

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

289

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

290

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

291

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

292

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

293

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

294

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

295

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

296

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

297

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

298

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

299

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

300

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

301

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

302

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

303

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

304

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

305

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

306

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

307

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

308

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

309

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

310

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

311

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

312

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

313

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

314

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

315

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

316

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

317

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

318

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

319

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

320

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

321

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

322

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

323

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

324

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

325

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

326

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

327

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

328

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

329

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

330

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

331

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

332

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

333

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

334

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

335

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

336

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

337

Small Mammal Sampling in Mortandad and Los Alamos Canyons, 2005  

SciTech Connect

As part of an ongoing ecological field investigation at Los Alamos National Laboratory, a study was conducted that compared measured contaminant concentrations in sediment to population parameters for small mammals in the Mortandad Canyon watershed. Mortandad Canyon and its tributary canyons have received contaminants from multiple solid waste management units and areas of concern since establishment of the Laboratory in the 1940s. The study included three reaches within Effluent and Mortandad canyons (E-1W, M-2W, and M-3) that had a spread in the concentrations of metals and radionuclides and included locations where polychlorinated biphenyls and perchlorate had been detected. A reference location, reach LA-BKG in upper Los Alamos Canyon, was also included in the study for comparison purposes. A small mammal study was initiated to assess whether potential adverse effects were evident in Mortandad Canyon due to the presence of contaminants, designated as contaminants of potential ecological concern, in the terrestrial media. Study sites, including the reference site, were sampled in late July/early August. Species diversity and the mean daily capture rate were the highest for E-1W reach and the lowest for the reference site. Species composition among the three reaches in Mortandad was similar with very little overlap with the reference canyon. Differences in species composition and diversity were most likely due to differences in habitat. Sex ratios, body weights, and reproductive status of small mammals were also evaluated. However, small sample sizes of some species within some sites affected the analysis. Ratios of males to females by species of each site (n = 5) were tested using a Chi-square analysis. No differences were detected. Where there was sufficient sample size, body weights of adult small mammals were compared between sites. No differences in body weights were found. Reproductive status of species appears to be similar across sites. However, sample size prevents a detailed examination of reproduction composition. Because of small sample size of some species and differences that might occur on a seasonal basis, additional sampling would need to be conducted to further evaluate sex ratios, body weights, and reproductive characteristics.

Kathy Bennett, Sherri Sherwood, and Rhonda Robinson

2006-08-15

338

Radioactive source materials in Los Estados Unidos de Venezuela  

USGS Publications Warehouse

This report summarizes the data available on radioactive source materials in Los Estados Unidos de Venezuela accumulated by geologists of the Direccions Tecnica de Geolgia and antecedent agencies prior to June 1951, and the writers from June to November 1951. The investigation comprised preliminary study, field examination, office studies, and the preparation of this report, in which the areas and localities examined are described in detail, the uranium potentialities of Venezuela are summarized, and recommendations are made. Preliminary study was made to select areas and rock types that were known or reported to be radioactive or that geologic experience suggests would be favorable host for uranium deposits, In the office, a study of gamma-ray well logs was started as one means of amassing general radiometric data and of rapidly scanning many of ye rocks in northern Venezuela; gamma-ray logs from about 140 representative wells were examined and their peaks of gamma intensity evaluated; in addition samples were analyzed radiometrically, and petrographically. Radiometic reconnaissance was made in the field during about 3 months of 1951, or about 12 areas, including over 100 localities in the State of Miranda, Carabobo, Yaracuy, Falcon, Lara, Trujillo, Zulia, Merida, Tachira, Bolivar, and Territory Delta Amacuro. During the course of the investigation, both in the filed and office, information was given about geology of uranium deposits, and in techniques used in prospecting and analysis. All studies and this report are designed to supplement and to strengthen the Direccion Tecnica de Geologias's program of investigation of radioactive source in Venezuela now in progress. The uranium potentialities of Los Estados de Venezuela are excellent for large, low-grade deposits of uraniferous phospahtic shales containing from 0.002 to 0.027 percent uranium; fair, for small or moderate-sized, low-grade placer deposits of thorium, rare-earth, and uranium minerals; poor, for high-grade hydrothermal pitchblende deposits; and highly possible for small, medium- to high-grade despots of carnotite-or copper-uranium bearing sandstone. Recommendations for the Venezuelan uranium program include 1) the systematic collection of a mass general radiometric data by examining sample collections, expanding the gamma-ray program, encouraging the use of Geiger counter by field geologists, and by enlisting the aid of the general public; 2) , the examination of specific areas or localities, chosen on the basis of geologic favorability from the results of the amassing of data, or obtained by hints and rumors; 3), the organization of a unit within the Direccion Tecnica de Geologica to direct, collection, and collate metric data. It is emphasized that to be most fruitful the program requires the application of sounds and imaginative geologic theory.

Wyant, Donald G.; Sharp, William N.; Rodriguez, Carlos Ponte

1953-01-01

339

Perspective View with Landsat Overlay, Los Angeles Basin  

NASA Technical Reports Server (NTRS)

Most of Los Angeles is visible in this computer-generated north-northeast perspective viewed from above the Pacific Ocean. In the foreground the hilly Palos Verdes peninsula lies to the left of the harbor at Long Beach, and in the middle distance the various communities that comprise the greater Los Angeles area appear as shades of grey and white. In the distance the San Gabriel Mountains rise up to separate the basin from the Mojave Desert, which can be seen near the top of the image.

This 3-D perspective view was generated using topographic data from the Shuttle Radar Topography Mission (SRTM) and an enhanced color Landsat 5satellite image mosaic. Topographic expression is exaggerated one and one-half times.

Landsat has been providing visible and infrared views of the Earth since 1972. SRTM elevation data matches the 30-meter (98-foot) resolution of most Landsat images and will substantially help in analyzing the large and growing Landsat image archive.

Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on Feb. 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 3-D measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter (approximately 200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between NASA, the National Imagery and Mapping Agency (NIMA) of the U.S. Department of Defense and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., for NASA's Earth Science Enterprise, Washington, D.C.

Size: View width 70 kilometers (42 miles), View distance 160 kilometers(100 miles) Location: 34.0 deg. North lat., 118.2 deg. West lon. Orientation: View north-northeast Image Data: Landsat Bands 3, 2, 1 as red, green, blue, respectively Date Acquired: February 2000 (SRTM)

2002-01-01

340

Radiometric sources for the Los Alamos National Laboratory calibration Laboratory  

SciTech Connect

Los Alamos is developing a laboratory that will support state of the art calibration of moderate-aperture instrumentation (< 40 cm diameter) having high spatial and thermal resolution. Highly accurate calibration in the reflected solar and thermal infrared spectral regions are required for newly developed instrumentation. Radiometric calibration of the instrumentation requires well-characterized, extensive sources of radiation from 0.45 to 12 {mu}m. For wavelengths above 2.5 {mu}m, blackbodies having temperature control and radiometric uniformity to within 100 mK are being designed and will be radiometrically characterized at the National Institute of Standards and Technology (NIST). For the spectral range 0.45--2.5 {mu}m, a ``whitebody`` integrating sphere equipped with tungsten-halogen lamps and enclosed inside a vacuum shroud will be used; this vacuum-compatible extensive standard diffuse source utilizes well-known technology and will be characterized at NIST`s existing facilities. Characterization of instrumental contrast performance for wavelengths, {lambda}, beyond 2.5 {mu}m will utilize a recently designed absolute variable-contrast IR radiometric calibrator, and preliminary data indicate that this calibrator will perform satisfactorily. Conceptual design and status of these extensive broad-band sources and of a monochromatic source to be used for spectral calibrations will be presented.

Maier, W.B. II; Holland, R.; Bender, S.; Byrd, D.; Michaud, F.D.; Moore, S. [Los Alamos National Lab., NM (United States); O`Brian, T.R. [National Inst. of Standards and Technology, Gaithersburg, MD (United States)

1994-07-01

341

Puente Hills blind-thrust system, Los Angeles, California  

USGS Publications Warehouse

We describe the three-dimensional geometry and Quaternary slip history of the Puente Hills blind-thrust system (PHT) using seismic reflection profiles, petroleum well data, and precisely located seismicity. The PHT generated the 1987 Whittier Narrows (moment magnitude [Mw] 6.0) earthquake and extends for more than 40 km along strike beneath the northern Los Angeles basin. The PHT comprises three, north-dipping ramp segments that are overlain by contractional fault-related folds. Based on an analysis of these folds, we produce Quaternary slip profiles along each ramp segment. The fault geometry and slip patterns indicate that segments of the PHT are related by soft-linkage boundaries, where the fault ramps are en echelon and displacements are gradually transferred from one segment to the next. Average Quaternary slip rates on the ramp segments range from 0.44 to 1.7 mm/yr, with preferred rates between 0.62 and 1.28 mm/yr. Using empirical relations among rupture area, magnitude, and coseismic displacement, we estimate the magnitude and frequency of single (Mw 6.5-6.6) and multisegment (Mw 7.1) rupture scenarios for the PHT.

Shaw, J. H.; Plesch, A.; Dolan, J. F.; Pratt, T. L.; Fiore, P.

2002-01-01

342

Helioseismic Tests of the New Los Alamos LEDCOP Opacities  

NASA Astrophysics Data System (ADS)

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 to noticeable differences in the solar structure (up to 0.3% in sound speed), with the OPAL model being the closest to the helioseismic data. More than half of the difference between the two opacity sets results from the interpolation scheme and from the relatively widely spaced temperature grids used in the tables. The remaining 3% intrinsic difference between the OPAL and the LEDCOP opacities in the radiative interior of the Sun is well within the error bars on the opacity calculations resulting from the uncertainties on the physics. We conclude that both the OPAL and LEDCOP opacities produce solar models in close agreement with helioseismic inferences, but discrepancies still persist at the level of 0.6% between the calculated and inferred sound speed in the radiative interior of the Sun.

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

2001-11-01

343

HELIOSEISMIC TESTS OF THE NEW LOS ALAMOS OPACITIES  

SciTech Connect

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 solar structure (up to 0.4% in sound speed), with the OPAL model being the closest to the helioseismic data. More than half of the difference between the two opacity sets results from the interpolation scheme and from the relatively widely spaced temperature grids used in the tables. The remaining 3% intrinsic difference between the OPAL and the LEDCOP opacities in the radiative interior of the Sun is well within the error bars on the opacity calculations resulting from the uncertainties on the physics. We conclude that the OPAL and LEDCOP opacity sets do about as well in the radiative interior of the Sun.

J. GUZIK; ET AL

2001-01-01

344

Wildlife use of NPDES outfalls at Los Alamos National Laboratory  

SciTech Connect

From July through October of 1991, the Biological Resources Evaluation Team (BRET) surveyed 133 of the 140 National Pollutant Discharge and Elimination System outfalls at Los Alamos National Laboratory (LANL). The purpose of the survey was to determine the use of these wastewater outfalls by wildlife. BRET observed wildlife or evidence of wildlife (scat, tracks, or bedding) by 35 vertebrate species in the vicinity of the outfalls, suggesting these animals could be using water from outfalls. Approximately 56% of the outfalls are probably used or are suitable for use by large mammals as sources of drinking water. Additionally, hydrophytic vegetation grows in association with approximately 40% of the outfalls-a characteristic that could make these areas eligible for wetland status. BRET recommends further study to accurately characterize the use of outfalls by small and medium-sized mammals and amphibians. The team also recommends systematic aquatic macroinvertebrate studies to provide information on resident communities and water quality. Wetland assessments may be necessary to ensure compliance with wetland regulations if LANL activities affect any of the outfalls supporting hydrophytic vegetation.

Foxx, T.; Blea-Edeskuty, B.

1995-09-01

345

Los Alamos Neutron Science Center (LANSCE) accelerator timing system upgrade  

SciTech Connect

The Los Alamos Neutron Science Center (LANSCE) 800 MeV proton linear accelerator (linac) operates at a maximum repetition rate of twice the AC power line frequency, i.e. 120 Hz. The start of each machine cycle occurs a fixed delay after each zero-crossing of the AC line voltage. Fluctuations in the AC line frequency and phase are therefore present on all linac timing signals. Proper beam acceleration along the linac requires that the timing signals remain well synchronized to the AC line. For neutron chopper spectrometers, e.g., PHAROS at the Manuel Lujan Jr. Neutron Scattering Center, accurate neutron energy selection requires that precise synchronization be maintained between the beam-on-target arrival time and the neutron chopper rotor position. This is most easily accomplished when the chopper is synchronized to a stable, fixed frequency signal. A new zero-crossing circuit which employs a Phase-Locked Loop (PLL) has been developed to increase the phase and frequency stability of the linac timing signals and thereby improve neutron chopper performance while simultaneously maintaining proper linac operation. Results of timing signal data analysis and modeling and a description of the PLL circuit are presented.

Rybarcyk, L.J.; Shelley, F.E. Jr. [Los Alamos National Lab., NM (United States). LANSCE Div.

1997-10-01

346

Los Alamos Scientific Laboratory long-range alarm system  

SciTech Connect

The Los Alamos Scientific Laboratory (LASL) Long-Range Alarm System is described. The last few years have brought significant changes in the Department of Energy regulations for protection of classified documents and special nuclear material. These changes in regulations have forced a complete redesign of the LASL security alarm system. LASL covers many square miles of varying terrain and consists of separate technical areas connected by public roads and communications. A design study over a period of 2 years produced functional specifications for a distributed intelligence, expandable alarm system that will handle 30,000 alarm points from hundreds of data concentrators spread over a 250-km/sup 2/ area. Emphasis in the design was on nonstop operation, data security, data communication, and upward expandability to incorporate fire alarms and the computer-aided dispatching of security and fire vehicles. All aspects of the alarm system were to be fault tolerant from the central computer system down to but not including the individual data concentrators. Redundant communications lines travel over public domain from the alarmed area to the central alarm station.

DesJardin, R.; Machanik, J.

1980-01-01

347

Status of the Los Alamos heavy ion injector  

SciTech Connect

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 electrostatic accelerator for Al/sup +/ ions in cooperation with the multiple beam ion induction linac development program at Lawrence Berkeley Laboratory. The ion source will be a pulsed metal vapor arc plasma. Individual sources will be used for each beam. A biased grid will control plasma flux into the ion extraction region. The beams will be accelerated by a series of electrodes with spacing and shape designed to control beam emittance and divergence. The accelerating column will be made of 85% purity aluminum oxide cylinders brazed to niobium high voltage feedthrough rings. The high voltage pulse will be generated by a 2-MV Marx generator with a special circuit designed to control voltage pulse flatness. The Marx generator and the accelerating column will be cantilevered from opposite ends of the containment vessel, which will be pressurized to 65 psig with a 30/60 mixture of SF/sub 6//N/sub 2/. The ceramic column and an 800-kV Marx prototype have been built. The pressure vessel was finished in June 1986. High voltage testing of the column will begin late in 1986.

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

1986-01-01

348

Building an artificial intelligence capability at Los Alamos  

SciTech Connect

In 1985, after three years of preliminary work, Management of the Los Alamos National Laboratory started an ambitious program to develop a strong technical capability in the rapidly emerging field of Artificial Intelligence/Knowledge Based Systems (AI/KBS). When this AI development program began, except for a few staff members doing basic AI research, AI was essentially nonexistent at the laboratory. The basics, including such things as AI computer hardware and software, literature, books, knowledgeable personnel, or even a general knowledge of what AI was, were most difficult if not impossible to find. For this reason, we had to approach the problem with a very broad perspective, which strongly addressed the basics while aiming toward more advanced AI program elements. Broad, intensive education was the ''bootstrapping'' tool used in this five year, multi-million dollar AI capability development program. Halfway through the program, our accomplishments indicate that the program is extremely successful. In terms of trained staff, active programs and ''state-of-the-art equipment,'' we have developed one of the strongest AI technical capabilities within the Department of Energy (DOE) and the Department of Defense(DOD). However, a great deal more must be done before the full potential of the program can be realized. 1 fig.

Marinuzzi, J.G.

1988-01-01

349

Re-engineering the Los Alamos Common File System  

SciTech Connect

The Los Alamos National Laboratory's Common File System is being substantially upgraded so it will continue to meet the future data storage needs of the Laboratory and other sites. The nature of computing is changing with the advent of workstations, different work loads, and standard approaches to networking and operating systems. We reviewed the pros and cons of the Common File System and numerous existing and planned systems. Our conclusion was that the Common File System was a valuable resource with many strengths that should be preserved for the future. We have arrived at a set of recommendations for changes and additions that we feel will allow the Common File System to continue to meet data storage needs in both the short and long term. The recommendations for 1990--1992 support the transition to Unix on supercomputers and support high performance networking. The recommendations for 1992--1995 support the transition to a Unix type file system that provides a significant level of file location transparency. For 1995--2000 the recommendations are necessarily less precise but support the notion of standard security, transparent file systems and faster networking. 11 refs.

Christman, R.D.; Cook, D.P.; Mercier, C.W.

1990-01-01

350

Los Alamos High-Brightness Accelerator FEL (HIBAF) facility  

SciTech Connect

The 10-/mu/m Los Alamos free-electron laser (FEL) facility is being upgraded. The conventional electron gun and bunchers have been replaced with a much more compact 6-MeV photoinjector accelerator. By adding existing parts from previous experiments, the primary beam energy will be doubled to 40 MeV. With the existing 1-m wiggler (/lambda//sub w/ = 2.7 cm) and resonator, the facility can produce photons with wavelengths from 3 to 100 /mu/m when lasing on the fundamental mode and produce photons in the visible spectrum with short-period wigglers or harmonic operation. After installation of a 150/degree/ bend, a second wiggler will be added as an amplifier. The installation of laser transport tubes between the accelerator vault and an upstairs laboratory will provide experimenters with a radiation-free environment for experiments. Although the initial experimental program of the upgraded facility will be to test the single accelerator-master oscillator/power amplifier configuration, some portion of the operational time of the facility can be dedicated to user experiments. 13 refs., 5 figs., 6 tabs.

Cornelius, W.D.; Bender, S.; Meier, K.; Thode, L.E.; Watson, J.M.

1989-01-01

351

Final Progress Report: Internship at Los Alamos National Laboratory  

SciTech Connect

Originally I was tasked fluidized bed modeling, however, I changed projects. While still working with ANSYS Fluent, I performed a study of particle tracks in glove boxes. This is useful from a Health-Physics perspective, dealing respirable particles that can be hazardous to the human body. I iteratively tested different amounts of turbulent particles in a steady-state flow. The goal of this testing was to discover how Fluent handles built-in Rosin-Rammler distributions for particle injections. I worked on the health physics flow problems and distribution analysis under the direction of two mentors, Bruce Letellier and Dave Decroix. I set up and ran particle injection calculations using Fluent. I tried different combinations of input parameters to produce sets of 500,000, 1 million, and 1.5 million particles to determine what a good test case would be for future experiments. I performed a variety of tasks in my work as an Undergraduate Student Intern at LANL this summer, and learned how to use a powerful CFD application in addition to expanding my skills in MATLAB. I enjoyed my work at LANL and hope to be able to use the experience here to further my career in the future working in a security-conscious environment. My mentors provided guidance and help with all of my projects and I am grateful for the opportunity to work at Los Alamos National Laboratory.

Dunham, Ryan Q. [Los Alamos National Laboratory

2012-08-10

352

Plutonium metal preparation and purification at Los Alamos, 1984  

SciTech Connect

Plutonium metal preparation and purification are well established at Los Alamos. Metal is prepared by calcothermic reduction of both PuF/sub 4/ and PuO/sub 2/. Metal is purified by halide slagging, casting, and electrorefining. The product from the production sequence is ultrapure plutonium metal. All of the processes involve high temperature operation and all but casting involve molten salt media. Development efforts are fourfold: (1) recover plutonium values from residues; (2) reduce residue generation through process improvements and changes; (3) recycle of reagents, and (4) optimize and integrate all processes into a close-loop system. Plutonium residues are comprised of oxides, chlorides, colloidal metal suspensions, and impure metal heels. Pyrochemical recovery techniques are under development to address each residue. In addition, we are looking back at each residue generation step and are making process changes to reduce plutonium content in each residue. Reagent salt is the principle media used in pyrochemical processing. The regeneration and recycle of these reagents will both reduce our waste handling and operating expense. The fourth area, process optimization, involves both existing processes and new process developments. A status of efforts in all four of these areas will be summarized.

Christensen, D.C.; Williams, J.D.; McNeese, J.A.; Fife, K.W.

1984-01-01

353

Facility model for the Los Alamos Plutonium Facility  

SciTech Connect

The Los Alamos Plutonium Facility contains more than sixty unit processes and handles a large variety of nuclear materials, including many forms of plutonium-bearing scrap. The management of the Plutonium Facility is supporting the development of a computer model of the facility as a means of effectively integrating the large amount of information required for material control, process planning, and facility development. The model is designed to provide a flexible, easily maintainable facility description that allows the faciltiy to be represented at any desired level of detail within a single modeling framework, and to do this using a model program and data files that can be read and understood by a technically qualified person without modeling experience. These characteristics were achieved by structuring the model so that all facility data is contained in data files, formulating the model in a simulation language that provides a flexible set of data structures and permits a near-English-language syntax, and using a description for unit processes that can represent either a true unit process or a major subsection of the facility. Use of the model is illustrated by applying it to two configurations of a fictitious nuclear material processing line.

Coulter, C.A.; Thomas, K.E.; Sohn, C.L.; Yarbro, T.F.; Hench, K.W.

1986-01-01

354

Los Alamos Shows Airport Security Technology at Work  

SciTech Connect

Los Alamos scientists have advanced a Magnetic Resonance Imaging (MRI) technology that may provide a breakthrough for screening liquids at airport security. They've added low-power X-ray data to the mix, and as a result have unlocked a new detection technology. Funded in part by the Department of Homeland Security's Science and Technology Directorate, the new system is named MagRay. The goal is to quickly and accurately distinguish between liquids that visually appear identical. For example, what appears to be a bottle of white wine could potentially be nitromethane, a liquid that could be used to make an explosive. Both are clear liquids, one would be perfectly safe on a commercial aircraft, the other would be strictly prohibited. How to tell them apart quickly without error at an airport security area is the focus of Michelle Espy, Larry Schultz and their team. In this video, Espy and the MagRay team explain how the new technology works, how they've developed an easy operator interface, and what the next steps might be in transitioning this technology to the private sector.

Espy, Michelle; Schultz, Larry; Hunter, James

2013-11-25

355

Atomic Structure Calculations from the Los Alamos Atomic Physics Codes  

DOE Data Explorer

The well known Hartree-Fock method of R.D. Cowan, developed at Los Alamos National Laboratory, is used for the atomic structure calculations. Electron impact excitation cross sections are calculated using either the distorted wave approximation (DWA) or the first order many body theory (FOMBT). Electron impact ionization cross sections can be calculated using the scaled hydrogenic method developed by Sampson and co-workers, the binary encounter method or the distorted wave method. Photoionization cross sections and, where appropriate, autoionizations are also calculated. Original manuals for the atomic structure code, the collisional excitation code, and the ionization code, are available from this website. Using the specialized interface, you will be able to define the ionization stage of an element and pick the initial and final configurations. You will be led through a series of web pages ending with a display of results in the form of cross sections, collision strengths or rates coefficients. Results are available in tabular and graphic form.

Cowan, R. D.

356

Population Files for use with CAP88 at Los Alamos  

SciTech Connect

CAP88 (Clean Air Act Assessment Package 1988) is a computer model developed for the US Environmental Protection Agency to assess the potential dose from radionuclide emissions to air and to demonstrate compliance with the Clean Air Act. It has options to calculate either individual doses, in units of mrem, or a collective dose, also called population dose, in units of person-rem. To calculate the collective dose, CAP88 uses a population file such as LANL.pop, that lists the number of people in each sector (N, NNE, NE, etc.) as a function of distance (1 to 2 km, etc.) out to a maximum radius of 80 km. Early population files are described in the Los Alamos National Laboratory (LANL) Environmental Reports for 1985 (page 14) and subsequent years. LA-13469-MS describes a population file based on the 1990 census. These files have been updated several times, most recently in 2006 for CAP88 version 3. The 2006 version used the US census for 2000. The present paper describes the 2012 updates, using the 2010 census.

McNaughton, Michael W [Los Alamos National Laboratory; Brock, Burgandy R [Los Alamos National Laboratory

2012-07-10

357

Los Alamos Plutonium Facility newly generated TRU waste certification  

SciTech Connect

This paper presents an overview of the activities being planned and implemented to certify newly generated contact handled transuranic (TRU) waste produced by Los Alamos National Laboratory`s (LANL`s) Plutonium Facility. Certifying waste at the point of generation is the most important cost and labor saving step in the WIPP certification process. The pedigree of a waste item is best known by the originator of the waste and frees a site from expensive characterization activities such as those associated with legacy waste. Through a cooperative agreement with LANLs Waste Management Facility and under the umbrella of LANLs WIPP-related certification and quality assurance documents, the Plutonium Facility will be certifying its own newly generated waste. Some of the challenges faced by the Plutonium Facility in preparing to certify TRU waste include the modification and addition of procedures to meet WIPP requirements, standardizing packaging for TRU waste, collecting processing documentation from operations which produce TRU waste, and developing ways to modify waste streams which are not certifiable in their present form.

Gruetzmacher, K.; Montoya, A.; Sinkule, B.; Maez, M.

1997-02-01

358

High temperature efforts at Los Alamos National Laboratory  

SciTech Connect

With the potential for significant payoffs in chemical processing, separation science, and ``green technology``, inorganic membranes merit the increased attention they are currently receiving. Application of thin film deposition and characterization expertise at Los Alamos National Laboratory (LANL) to the fabrication of membranes has led to the development of two new membranes. The first is a zeolitic film formed by pulsed laser deposition (PLD). The material deposited is largely amorphous but yields an interesting microporous structure. The pores, roughly 10 to 15 A in diameter, run perpendicular to the substrate and, since the film is typically only a half micron thick, provide excellent flow rates. The PLD material has been deposited on quartz crystal microbalances (QCMS) to investigate its potential as a sensor. As such, it has shown discrimination of simple alcohol isomers. The second membrane, consisting of a composite metal structure, passes hydrogen exclusively. Currently, we are studying the possibility of incorporating the membrane in a hydrogen fuel cell using a methanol reformer.

Peachey, N.; Dye, R.

1995-12-01

359

Los Alamos Shows Airport Security Technology at Work  

ScienceCinema

Los Alamos scientists have advanced a Magnetic Resonance Imaging (MRI) technology that may provide a breakthrough for screening liquids at airport security. They've added low-power X-ray data to the mix, and as a result have unlocked a new detection technology. Funded in part by the Department of Homeland Security's Science and Technology Directorate, the new system is named MagRay. The goal is to quickly and accurately distinguish between liquids that visually appear identical. For example, what appears to be a bottle of white wine could potentially be nitromethane, a liquid that could be used to make an explosive. Both are clear liquids, one would be perfectly safe on a commercial aircraft, the other would be strictly prohibited. How to tell them apart quickly without error at an airport security area is the focus of Michelle Espy, Larry Schultz and their team. In this video, Espy and the MagRay team explain how the new technology works, how they've developed an easy operator interface, and what the next steps might be in transitioning this technology to the private sector.

Espy, Michelle; Schultz, Larry; Hunter, James

2014-06-24

360

LAPTRON : Los Alamos Pressure-Temperature Researches Online Neutron  

NASA Astrophysics Data System (ADS)

We propose to build a dedicated high-pressure (P) and high-temperature (T) neutron beamline at Los Alamos Neutron Science Center (LANSCE) to perform state-of-the-art simultaneous neutron diffraction and neutron tomography experiments at high P-T conditions for the characterization of material properties in a wide range of scientific and technological disciplines. A large volume 2000-tone press, TAPLUS-2000, will be the central apparatus mounted permanently in the instrument hutch and advanced beamline equipments will be built around the press. The proposed high-pressure neutron beamline will integrate diffraction, radiography, tomography, and ultrasonic interferometry techniques so that the instrument can profoundly focus on materials property characterization. It will be particularly valuable for the engineering aspects of the materials study such as deformation mechanism, yield strength, constitutive equation, acoustic elasticity, and flow law under high P-T conditions. The integrations with in-situ neutron diffraction, radiography, and tomography will greatly enhance instrument performances and achieve significantly in multidiscipline sciences. For MR01: The Laboratory Prospect to the Earth: Advances in Mineral and Rock Physics

Zhao, Y.

2004-12-01

361

Environmental Assessment for the Installation and Operation of Combustion Turbine Generators at Los Alamos National Laboratory, Los Alamos, New Mexico  

SciTech Connect

NEPA requires Federal agency officials to consider the environmental consequences of their proposed actions before decisions are made. In complying with NEPA, the U.S. DOE, NNSA, follows the Council on Environmental Quality 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 (FONSI). At this time, the NNSA must make a decision regarding installing, operating and maintaining two approximately 20 Megawatt (MW) combustion turbine generators (CTGs) within the Technical Area (TA)-3 Co-generation Complex (Building 3-22) at Los Alamos National Laboratory (LANL). LANL is a Federal facility located at Los Alamos, New Mexico, that comprises 43 square miles (111 square kilometers) of buildings, structures, and forested land (Figure 1). LANL is administered by NNSA for the Federal government and managed and operated under contract by the University of California (UC). This EA has been prepared to assess the potential environmental consequences of the Proposed Action--installing and operating two CTGs--and of the No Action Alternative. The objectives of this EA are to (1) describe the underlying purpose and need for DOE action; (2) describe the Proposed Action and identify and describe any reasonable alternatives that satisfy the purpose and need for Agency Action; (3) describe baseline environmental conditions at LANL; (4) analyze the potential indirect, direct, and cumulative effects to the existing environment from implementation of the Proposed Action; and (5) compare the effects of the Proposed Action with the effects of the No Action Alternative and other reasonable alternatives. For the purposes of compliance with NEPA, reasonable alternatives are identified as being those that meet NNSA's purpose and need for action by virtue of timeliness, appropriate technology, and applicability to LANL. The EA process provides NNSA with environmental information that can be used in developing mitigation, if necessary, to minimize or avoid adverse effects to the quality of the human environment and natural ecosystems should NNSA decide to proceed with implementing the Proposed Action at LANL.

N /A

2002-12-12

362

Coexistence of galenas with different Pb isotopic composition in Los Pedroches batholith area (Spain)  

Microsoft Academic Search

The Los Pedroches batholith region (S Spain) includes three separated mining districts: Linares, La Carolina and Los Pedroches. The Pb isotopic composition of thirty-three galenas from this sector has been measured. On the basis of the Pb data two types of mineralization are established. A first type including: (i) the Linares and La Carolina districts where ore-bearing filons cut Hercynian

S. García de Madinabeitia; J. F. Santos Zalduegui; F. J. Larrea; M. Carracedo; J. I. Gil Ibarguchi

2003-01-01

363

Los Angeles Community College District Feeder High School Student Characteristics and Enrollment Patterns, 1983-1985.  

ERIC Educational Resources Information Center

A study was conducted by the Los Angeles Community College District (LACCD) to examine rates of matriculation from the Los Angeles Unified School District's (LAUSD's) 64 high schools to the LACCD and to develop recommendations for expanding college-going rates. An analysis of enrollment and flow patterns revealed the following: (1) LAUSD high…

Landis, Jeanne T.

364

Los Angeles (California) High Intensity Drug Trafficking Area. Drug Market Analysis, 2011.  

National Technical Information Service (NTIS)

This is the Los Angeles (California) High Intensity Drug Trafficking Area (HIDTA) Drug Market Analysis for 2011. The drug threat to the Los Angeles HIDTA region has changed little over the past year. Wholesale quantities of most illicit drugs are widely a...

2011-01-01

365

Observation of space-charge effects in the Los Alamos Proton Storage Ring.  

National Technical Information Service (NTIS)

In recent operation of the Los Alamos Proton Storage Ring (PSR), the vertical and horizontal tunes have been moved closer to the integers (v(sub y) = 2.12, v(sub x) = 3.17) due to enlarge the low-los working region. In this region, the beam can be signifi...

D. Neuffer D. Fitzgerald T. Hardek R. Hutson R. Macek

1991-01-01

366

School's a Rough Place: Youth Gangs, Drug Users, and Family Life in Los Angeles. Draft.  

ERIC Educational Resources Information Center

The lives and places in society of urban youth at risk of dropping out of the Los Angeles (California) Unified School District schools are explored through interviews of adolescents whom the author met when doing field work in Los Angeles County. Data come from interviews conducted in the course of the 1991 Drug Use Forecasting Study (DUF) and the…

Boyle, Kathleen

367

LOS DERECHOS DE PROPIEDAD SOBRE LA TIERRA Reglas de juego y cambios en su institucionalidad  

Microsoft Academic Search

Los derechos de propiedad sobre la tierra todavía son objeto de estudio en el siglo XXI, aunque ya debiera ser un tema superado, desde México hasta Argentina para sólo mencionar a Latinoamérica, hay cuestiones de la tierra por resolver y disculpas para asumir actitudes al respecto; aquí se presenta una revisión sobre los cambios que han sucedido últimamente en Colombia,

Ricardo Lozano Botache; José M. González Afanador; Diana M. Osma R

2010-01-01

368

La estrategia de los EE.UU. atenta contra la Humanidad y amenaza al planeta  

Microsoft Academic Search

Es imprescindible analizar y comprender el proceso que llevó a los EE.UU. a erigirse en una potencia imperialista como nunca antes conoció la Humanidad. Asimismo comprender la conversión de una sociedad que privilegiaba sobre todo la Democracia y la participación en las decisiones en los distintos niveles de gestión ciudadana, en una población que privilegia el consumo, la riqueza y

Jacob Goransky

369

Aprovechamiento de los mercados financieros internacionales para gestionar el riesgo de amenazas naturales en América Latina  

Microsoft Academic Search

El presente informe técnico analiza la potencial aplicación práctica de los instrumentos financieros diseñados para el financiamiento y la transferencia del riesgo de las amenazas naturales en América Latina. En primer lugar, se presenta, en términos generales, el papel del financiamiento y de la transferencia de los riesgos en la gestión del riesgo de desastres. Luego se analiza las fuentes

Ivar Pettersen; John Magne Skjelvik; Nils Atle Krokeide

2006-01-01

370

Confronting Homophobia at School: High School Students and the Gay Men's Chorus of Los Angeles  

Microsoft Academic Search

This study discusses student responses to curriculum taught by the Gay Men's Chorus of Los Angeles to choral students in local high schools. The Gay Men's Chorus of Los Angeles's A-LIVE Music Project brings live music and standards-driven curriculum to high school youth with the express purpose of teaching content in innovative ways and encouraging students to think critically and

Greg Knotts; Dominic Gregorio

2011-01-01

371

The Sima de los Huesos crania (Sierra de Atapuerca, Spain). A comparative study  

Microsoft Academic Search

The Sima de los Huesos (Sierra de Atapuerca) cranial remains found up to and including the 1995 field season are described and compared with other fossils in order to assess their evolutionary relationships. The phenetic affinities of the Sima de los Huesos crania and a large sample ofHomofossils are investigated through principal component analyses. Metrical comparisons of the Sima de

J. L. Arsuaga; I. Mart??nez; A. Gracia; C. Lorenzo

1997-01-01

372

Los hechos regionales, base para las estructuras de gobierno en la ciudad-región de Medellín  

Microsoft Academic Search

La fusión urbana de los municipios del Área Metropolitana de Medellín, asociada al mejoramiento de las infraestructuras que la conectan con el oriente y occidente cercanos, han cambiado la realidad urbana, regional, social y económica. Sin embargo, las respuestas públicas a los fenómenos de la conurbación y a las dinámicas campo-ciudad siguen siendo respuestas municipalistas y fuertemente determinadas por la

Luis Fernando Agudelo Henao

2006-01-01

373

Control a los flujos de capital y credibilidad en el Gobierno  

Microsoft Academic Search

El control a los flujos de capitales es un instrumento utilizado en varios países. Estos, generalmente, se caracterizan por tener un desempeño macroeconómico inestable. En este trabajo se presenta un modelo teórico que busca explicar dicha situación. La restricción a la movilidad de capitales genera distorsiones macroeconómicas, las cuales siempre tienen costos para el país. Por su parte, los beneficios

Alberto Calderón

1990-01-01

374

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

375

In Search of the Ideal Reader for Nonfiction Children's Books about el Dia de Los Muertos  

ERIC Educational Resources Information Center

In mainstream American culture, death is not usually talked about openly. It is discussed privately among adults because death is often regarded as a final ending. Nevertheless, many elementary school teachers discuss el Dia de los Muertos with their students. The celebration of el Dia de los Muertos, in contrast to dominant ideology, commemorates…

Davila, Denise

2012-01-01

376

Un estudio indica que la sigmoidoscopia reduce los índices de cáncer colorrectal  

Cancer.gov

Estudio señala que la sigmoidoscopia flexible es efectiva para reducir los índices de casos nuevos y de muertes por cáncer colorrectal. Los investigadores encontraron que la mortalidad general por cáncer colorrectal se redujo 26% y que la incidencia se redujo 21% como resultado de hacerse exámenes de detección con sigmoidoscopia.

377

Review of the Organizational Structure and Operations of the Los Angeles Unified School District  

ERIC Educational Resources Information Center

The Los Angeles Unified School District is the second largest public school system in the United States, and one of the largest organizations of any kind in the country. As with urban school systems across the country, the Los Angeles school district is under enormous pressure to improve. The district is under public scrutiny and is the subject of…

Council of the Great City Schools, 2006

2006-01-01

378

Actitud en niños y adultos sobre los estereotipos de género en juguetes infantiles  

Microsoft Academic Search

Resumen. El trabajo muestra cómo a través del juego las nuevas generaciones aprenden y reproducen los patrones de conducta que observan en su entorno familiar, social, escolar y, especialmente, en los medios de comunicación. En este estudio participan 400 niños de entre tres y siete años de edad y 200 universitarios, y se realiza un análisis de las preferencias y

María del Carmen; Martínez Rein; Manuel Vélez Ce

2008-01-01

379

Siteseeing Buenos Aires in the early Argentine sound film Los tres berretines  

Microsoft Academic Search

Much like the majority of Argentine films produced during the 1930s, Los tres berretines aims to represent Buenos Aires as a modern metropolis. Set in the cosmopolitan capital, the film represents the social life of the rising middle class, its target market. This paper examines how the directorial team assembles place in Los tres berretines and how these places represent

Nicolas Poppe

2009-01-01

380

A Governance Reform Proposal: Improving Bus Transit Operations in Los Angeles  

Microsoft Academic Search

This article examines key governing issues related to Los Angeles transit operations. The study uses empirical data from the National Transit Database and personal interviews conducted with transit agency officials. Based on technical analysis and evaluation, the authors call for empowering council of governments and small cities to address interagency\\/intersector coordination and political equity issues, downsizing the Los Angeles County

Xueming Chen; Nelson Wikstrom

2009-01-01

381

GEOLOGÍA DEL COMPLEJO VOLCÁNICO LOS MENUCOS EN EL ÁREA TIPO - RÍO NEGRO  

Microsoft Academic Search

Geology of the Volcanic Complex Los Menucos in the type locality, Río Negro. Los Menucos Volcanic Complex outcrops within an area of about 8,000 km 2 of the Northpatagonian Massif. It is the major mag- matic event that occurred during the Triassic (- Early Jurassic?) in the region. The volcanic complex is constituted by pyroclastic deposits, lava flows, dykes and

Hebe LEMA; Alicia BUSTEROS; Raúl GIACOSA; Rubén CUCCHI

382

EOSPAC: A Subroutine Package for Accessing the Los Alamos Sesame EOS (Equations of state) Data Library.  

National Technical Information Service (NTIS)

This manual describes EOSPAC, a subroutine package for accessing the Los Alamos Sesame equations of state (EOS) data library, EOSPAC is designed for easy implementation in most hydrocodes running on the Los Alamos Cray-1 computers. The Sesame EOS data are...

C. W. Cranfill

1983-01-01

383

EOSPAC: a subroutine package for accessing the Los Alamos Sesame EOS data library  

Microsoft Academic Search

This manual describes EOSPAC, a subroutine package for accessing the Los Alamos Sesame equations of state (EOS) data library, EOSPAC is designed for easy implementation in most hydrocodes running on the Los Alamos Cray-1 computers. The Sesame EOS data are in tabular form and are accessed in two phases. During the set-up phase, the requested data tables are read into

Cranfill

1983-01-01

384

Energy supply and environmental issues: The Los Alamos National Laboratory experience in regional and international programs  

Microsoft Academic Search

The Los Alamos National Laboratory, operated by the University of California, encompasses more than forty-three square miles of mesas and canyons in northern New Mexico. A Department of Energy national laboratory, Los Alamos is one of the largest multidisciplinary, multiprogram laboratories in the world. Our mission, to apply science and engineering capabilities to problems of national security, has expanded to

Goff

1995-01-01

385

Los Angeles Metropolitan College: Proposal for a New College and Educational Centers.  

ERIC Educational Resources Information Center

As required by Title 5 of the California Education Code, this report presents data indicative of the educational needs to be met by the establishment of Los Angeles Metropolitan College, an institution to administer the overseas programs sponsored by the Los Angeles Community College District at 60 military bases around the world. The report first…

Los Angeles Community Coll. District, CA.

386

77 FR 39507 - Notice of Inventory Completion: Fowler Museum at UCLA, Los Angeles, CA  

Federal Register 2010, 2011, 2012, 2013

...2012. ADDRESSES: Wendy G. Teeter, Ph.D., Curator of Archaeology, Fowler Museum at UCLA, Box 951549, Los Angeles, CA 90095-1549...objects should contact Dr. Wendy G. Teeter, Curator of Archaeology, Fowler Museum at UCLA, Box 951549, Los Angeles, CA...

2012-07-03

387

76 FR 48176 - Notice of Inventory Completion: Fowler Museum at UCLA, Los Angeles, CA  

Federal Register 2010, 2011, 2012, 2013

...2011. ADDRESSES: Wendy G. Teeter, Ph.D., Curator of Archaeology, Fowler Museum at UCLA, Box 951549, Los Angeles, CA 90095-1549...remain should contact Wendy G. Teeter, Ph.D., Curator of Archaeology, Fowler Museum at UCLA, Box 951549, Los Angeles, CA...

2011-08-08

388

77 FR 25743 - Notice of Inventory Completion: Fowler Museum at UCLA, Los Angeles, CA  

Federal Register 2010, 2011, 2012, 2013

...2012. ADDRESSES: Wendy G. Teeter, Ph.D., Curator of Archaeology, Fowler Museum at UCLA, Box 951549, Los Angeles, CA 90095-1549...remains should contact Wendy G. Teeter, Ph.D., Curator of Archaeology, Fowler Museum at UCLA, Box 951549, Los Angeles, CA...

2012-05-01

389

News from Los Angeles: Billions for Schools and Who Is Watching? Proposition BB and Architects.  

ERIC Educational Resources Information Center

Discusses the role of Los Angeles Unified School District's Proposition BB Blue Ribbon Citizens' Oversight Committee, charged with overseeing $4 billion in school construction, and particularly the role of the American Institute of Architects of Los Angeles within the board. (EV)

Lehrer, Michael B.

1999-01-01

390

FONDO DE APORTACIONES PARA LA INFRAESTRUCTURA SOCIAL MUNICIPAL EN LOS MUNICIPIOS DE OAXACA 1998 – 2002  

Microsoft Academic Search

En el presente trabajo, en una primera parte hacemos una breve descripción de las distintas visiones que intentan abordar el tema de las razones que hacen que los países enfrenten diferencias en los niveles de ingresos y tasas de crecimiento, lo cual permite hacer una clasificación de países pobres y países ricos. En la segunda parte, realizamos una serie de

Marco Aurelio Mathus Robles

2008-01-01

391

Indicadores de riesgo y de gestión del riesgo de los desastres: resultados para Nicaragua  

Microsoft Academic Search

Los desastres naturales han repercutido en las perspectivas de desarrollo de muchos de los países de América Latina y el Caribe. Nicaragua está al frente de esta infortunada realidad, estando localizada en una de las zonas del mundo más propensa a amenazas naturales. Con el fin de apoyar a Nicaragua es reducir su vulnerabilidad frente a las amenazas y las

Omar D. Cardona

2007-01-01

392

LOS SISTEMAS INTEGRADOS DE GESTIÓN. UNA ALTERNATIVA METODOLÓGICA PARA SU DISEÑO E IMPLANTACIÓN  

Microsoft Academic Search

En este artículo se presentan consideraciones que facilitan la implantación de los sistemas de gestión en organizaciones que tienen implantado, o pretenden implantar, el sistema de dirección y gestión empresarial conforme a lo establecido en el decreto No.281 del Comité Ejecutivo del Consejo de Ministros de la República de Cuba y como parte de este los sistemas de control interno

Mayra R. Moreno Pino; María del Carmen Proenza Rivas; Martín Alberto Ayala López; Rossio Coya Cáceres; Iosvani Segura Leyva

2011-01-01

393

Security and Safety in Los Angeles High-Rise Buildings After 9/11.  

National Technical Information Service (NTIS)

1. 9/11 RAISES MANY QUESTIONS ABOUT HIGH-RISE BUILDING SECURITY PRACTICES IN Los Angeles; (2) Building Owners and Managers Association commissioned a short study by RAND at the behest of Los Angeles City Attorney Rocky Delgadillo; (3) Study to be presente...

R. W. Archibald J. J. Medby B. Rosen J. Schchter

2002-01-01

394

Estimación econométrica de la oferta laboral de los hogares nucleares en Colombia  

Microsoft Academic Search

RESUMEN Los desarrollos teóricos recientes muestran que las decisiones al interior de los hogares surgen de la interacción entre las preferencias individuales de cada miembro respecto al consumo de bienes, pero también dependen del uso de su tiempo, de la restricción presupuestaria del hogar y del proceso de negociación que tiene lugar al interior de este. Como resultado de estas

Jaime Enrique Cusba García; Iván Andrés Ramírez Pinzón; Wilson Mayorga Mogollón

2010-01-01

395

Use of screening action levels in risk management at Los Alamos National Laboratory  

SciTech Connect

The screening assessment approach used at Los Alamos National Laboratory has proved to be a valuable risk management tool in making decisions that are cost-effective, efficient, and defensible. Los Alamos has successfully used screening action levels to prioritize RFI activities, streamline data evaluation, and insure analytical methods are adequately sensitive to be protective of human health.

Beck, J.R.; Hueske, K.L. [Radian Corp., White Rock, NM (United States); Dorries, A.M. [Los Alamos National Lab., NM (United States)

1994-04-01

396

Environmental assessment for the scintillation vial crusher TA-54, Area L, Los Alamos National Laboratory, Los Alamos, New Mexico  

SciTech Connect

Research and development projects conducted at the Los Alamos National Laboratory produce scintillation vials as waste from normal operations. These vials contain radioisotopes such as tritium, carbon-14, and isotopes of transuranic elements such as americium-241, plutonium-238 and -239. The scintillation fluids contain some solvents defined as hazardous waste. The vials are thus classed as mixed waste under the Resource Conservation and Recovery Act (RCRA). The Laboratory has in storage some 520 drums of stored vials and is accumulating some 70 to 140 more drums annually. The drained vial fragments can be disposed of at TA-54 as low-level radioactive waste (LLW). The bulked liquid will be stored at TA-54 as RCRA mixed waste until treatment/disposal options are developed. Other waste from the vial crushing operation will also be stored at TA-54 as mixed waste. By operating the scintillation vial crusher, the storage space needed for this RCRA mixed waste stream can be reduced to about 5% of that currently being used. The other 95% will be vial fragments that can be disposed immediately as LLW.

Not Available

1992-07-01

397

Environmental assessment for the proposed CMR Building upgrades at the Los Alamos National Laboratory, Los Alamos, New Mexico. Final document  

SciTech Connect

In order to maintain its ability to continue to conduct uninterrupted radioactive and metallurgical research in a safe, secure, and environmentally sound manner, the US Department of Energy (DOE) proposes to upgrade the Los Alamos National Laboratory (LANL) Chemistry and Metallurgy Research (CMR) Building. The building was built in the early 1950s to provide a research and experimental facility for analytical chemistry, plutonium and uranium chemistry, and metallurgy. Today, research and development activities are performed involving nuclear materials. A variety of radioactive and chemical hazards are present. The CMR Building is nearing the end of its original design life and does not meet many of today`s design codes and standards. The Proposed Action for this Environmental Assessment (EA) includes structural modifications to some portions of the CMR Building which do not meet current seismic criteria for a Hazard Category 2 Facility. Also included are upgrades and improvements in building ventilation, communications, monitoring, and fire protection systems. This EA analyzes the environmental effects of construction of the proposed upgrades. The Proposed Action will have no adverse effects upon agricultural and cultural resources, wetlands and floodplains, endangered and threatened species, recreational resources, or water resources. The Proposed Action would have negligible effects on human health and transportation, and would not pose a disproportionate adverse health or environmental impact on minority or low-income populations within an 80 kilometer (50 mile) radius of the CMR Building.

NONE

1997-02-04

398

Initial performance of Los Alamos Advanced Free Electron Laser  

SciTech Connect

We report recent results on the high-brightness electron linac and initial performance of the Advanced FEL at Los Alamos. The design and construction of the Advanced FEL beamline are based upon integration of advanced technologies such as high-brightness photoinjector, high-gradient compact linac, and permanent-magnet beamline components. With the use of microwiggler, both permanent magnet and pulsed electromagnet, and compact optical resonator, the Advanced FEL will be the first of its kind small enough to be mounted on an optical table and yet capable of providing highpower optical output spanning the near-ir and visible regions. A schematic of the Advanced FEL is shown in. The source of high-current electron pulses is a laser-gated photoelectron injector which forms-an integral part of a high-gradient 1.2-m long rf linear accelerator. The latter is capable of accelerating electrons up to 20 MeV with room temperature operation and 25 MeV at 77K. The electrons are produced in 10-ps pulses with peak currents as high as 300 A. These electron pulses are transported in a brightness-preserving beamline consisting of permanent magnet dipoles and quadrupoles. The beamline has three 30{degrees} bends. The first bend allows for the photocathode drive laser input; the second allows for the FEL output and the third turns the electron beam into the floor for safety reasons. Additional information on the design physics of the Advanced FEL can be found elsewhere.

Nguyen, D.C.; Baca, D.M.; Chan, K.C.D.; Cheairs, R.B.; Fortgang, C.M.; Gierman, S.M.; Johnson, W.J.D.; Holcomb, D.E.; Kinross-Wright, J.; McCann, S.W.; Meier, K.L.; Plato, J.G.; Sheffield, R.L.; Sherwood, B.A.; Sigler, F.E.; Timmer, C.A.; Warren, R.W.; Weber, M.E.; Wilson, W.L.

1992-01-01

399

Initial performance of Los Alamos Advanced Free Electron Laser  

SciTech Connect

We report recent results on the high-brightness electron linac and initial performance of the Advanced FEL at Los Alamos. The design and construction of the Advanced FEL beamline are based upon integration of advanced technologies such as high-brightness photoinjector, high-gradient compact linac, and permanent-magnet beamline components. With the use of microwiggler, both permanent magnet and pulsed electromagnet, and compact optical resonator, the Advanced FEL will be the first of its kind small enough to be mounted on an optical table and yet capable of providing highpower optical output spanning the near-ir and visible regions. A schematic of the Advanced FEL is shown in. The source of high-current electron pulses is a laser-gated photoelectron injector which forms-an integral part of a high-gradient 1.2-m long rf linear accelerator. The latter is capable of accelerating electrons up to 20 MeV with room temperature operation and 25 MeV at 77K. The electrons are produced in 10-ps pulses with peak currents as high as 300 A. These electron pulses are transported in a brightness-preserving beamline consisting of permanent magnet dipoles and quadrupoles. The beamline has three 30{degrees} bends. The first bend allows for the photocathode drive laser input; the second allows for the FEL output and the third turns the electron beam into the floor for safety reasons. Additional information on the design physics of the Advanced FEL can be found elsewhere.

Nguyen, D.C.; Baca, D.M.; Chan, K.C.D.; Cheairs, R.B.; Fortgang, C.M.; Gierman, S.M.; Johnson, W.J.D.; Holcomb, D.E.; Kinross-Wright, J.; McCann, S.W.; Meier, K.L.; Plato, J.G.; Sheffield, R.L.; Sherwood, B.A.; Sigler, F.E.; Timmer, C.A.; Warren, R.W.; Weber, M.E.; Wilson, W.L.

1992-09-01

400

Ambient Air Pollution and Autism in Los Angeles County, California  

PubMed Central

Background: The prevalence of autistic disorder (AD), a serious developmental condition, has risen dramatically over the past two decades, but high-quality population-based research addressing etiology is limited. Objectives: We studied the influence of exposures to traffic-related air pollution during pregnancy on the development of autism using data from air monitoring stations and a land use regression (LUR) model to estimate exposures. Methods: Children of mothers who gave birth in Los Angeles, California, who were diagnosed with a primary AD diagnosis at 3–5 years of age during 1998–2009 were identified through the California Department of Developmental Services and linked to 1995–2006 California birth certificates. For 7,603 children with autism and 10 controls per case matched by sex, birth year, and minimum gestational age, birth addresses were mapped and linked to the nearest air monitoring station and a LUR model. We used conditional logistic regression, adjusting for maternal and perinatal characteristics including indicators of SES. Results: Per interquartile range (IQR) increase, we estimated a 12–15% relative increase in odds of autism for ozone [odds ratio (OR) = 1.12, 95% CI: 1.06, 1.19; per 11.54-ppb increase] and particulate matter ? 2.5 µm (OR = 1.15; 95% CI: 1.06, 1.24; per 4.68-?g/m3 increase) when mutually adjusting for both pollutants. Furthermore, we estimated 3–9% relative increases in odds per IQR increase for LUR-based nitric oxide and nitrogen dioxide exposure estimates. LUR-based associations were strongest for children of mothers with less than a high school education. Conclusion: Measured and estimated exposures from ambient pollutant monitors and LUR model suggest associations between autism and prenatal air pollution exposure, mostly related to traffic sources.

Becerra, Tracy Ann; Wilhelm, Michelle; Olsen, J?rn; Cockburn, Myles

2012-01-01

401

Transportation of pyrochemical salts from Rocky Flats to Los Alamos  

SciTech Connect

Radioactive legacy wastes or residues are currently being stored on numerous Sites around the former Department of Energy`s (DOE) Nuclear Weapons Complex. Since most of the operating facilities were shut down and have not operated since before the declared end to the Cold War in 1993, the historical method for treating these residues no longer exists. The risk associated with continued storage of these residues will dramatically increase with time. Thus, the DOE was directed by the Defense Nuclear Facility Safety Board in its Recommendation 94-1 to address and stabilize these residues and established an eight year time frame for doing so. There are only two options available to respond to this requirement: (1) restart existing facilities to treat and package the residues for disposal or (2) transport the residues to another operating facility within the Complex where they can be treated and packaged for disposal. This paper focuses on one such residue type, pyrochemical salts, produced at one Complex site, the Rocky Flats Plant located northwest of Denver, Colorado. One option for treating the salts is their shipment to Los Alamos, New Mexico, for handling at the Plutonium Facility. The safe transportation of these salts can be accomplished at present with several shipping containers including a DOT 6M, a DOE 9968, Type A or Type B quantity 55-gallon drum overpacks, or even the TRUPACT II. The tradeoffs between each container is examined with the conclusion that none of the available shipping containers is fully satisfactory. Thus, the advantageous aspects of each container must be utilized in an integrated and efficient way to effectively manage the risk involved. 1 fig.

Schreiber, S.B.

1997-02-01

402

ZERT Final Scientific Report Los Alamos National Laboratory  

SciTech Connect

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 site will meet a specific performance goal (e.g., <0.01% leak per year)? (2) What are key monitoring needs for verifying that an engineered geologic site is meeting a performance goal? (3) What are potential vulnerabilities for breeches in containment of CO{sub 2}, and how could they be mitigated either prior to operation or in the event that a threshold is exceeded? We have utilized LANL's multi-disciplinary expertise and an integrated approach combining laboratory experiments, field observations and numerical simulations to address various research issues related to above-mentioned areas. While there have been a number of major milestones achieved as described in past quarterly reports, two of the major accomplishments resulting from LANL's efforts include: (1) Development of the CO{sub 2}-PENS systems framework for long-term performance analysis of geologic CO{sub 2} sequestration sites. CO{sub 2}-PENS is first-ever systems analysis tool designed for assessment of CO{sub 2} sequestration sites. (2) One of the few field studies to-date focused on understanding impact of CO{sub 2} leakage on shallow groundwater chemistry. Two major conclusions of the study are as follows: the impact of co-contaminants transported with deeper brine on shallow groundwater quality is likely to be much larger than that of the CO{sub 2} and CO{sub 2}-induced geochemical reactions and in certain geochemical environment the reactivity of pure CO{sub 2} will not be sufficient to mobilize metals beyond background levels.

Pawar, Rajesh J. [Los Alamos National Laboratory

2011-01-01

403

Tritium monitor calibration at Los Alamos National Laboratory  

SciTech Connect

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 resultant HTO is captured in a second set of vials of glycol. The glycol is counted with a liquid scintillation counter. All calibrations are performed with tritium containing gas. The Radiation Instrumentation and Calibration (RIC) Team has constructed and maintains two closed loop gas handling systems based on femto TECH model U24 tritium ion chamber monitors: a fixed system housed in a fume hood and a portable system mounted on two two wheeled hand trucks. The U24 monitors are calibrated against tritium in nitrogen gas standards. They are used as standard transfer instruments to calibrate other ion chamber monitors with tritium in nitrogen, diluted with air. The gas handling systems include a circulation pump which permits a closed circulation loop to be established among the U24 monitor and typically two to four other monitors of a given model during calibration. Fixed and portable monitors can be calibrated. The stack bubblers are calibrated in the field by: blending a known concentration of tritium in air within the known volume of the two portable carts, coupled into a common loop; releasing that gas mixture into a ventilation intake to the stack; collecting oxidized tritium in the bubbler; counting the glycol; and using the stack and bubbler flow rates, computing the bubbler`s efficiency. Gas calibration has become a convenient and quality tool in maintaining the tritium monitors at LANL.

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

1997-08-01

404

2011 Los Alamos National Laboratory Riparian Inventory Results  

SciTech Connect

A total length of 36.7 kilometers of riparian habitat were inventoried within LANL boundaries between 2007 and 2011. The following canyons and lengths of riparian habitat were surveyed and inventoried between 2007 and 2011. Water Canyon (9,669 m), Los Alamos Canyon (7,131 m), Pajarito Canyon (6,009 m), Mortandad Canyon (3,110 m), Two-Mile Canyon (2,680 m), Sandia Canyon (2,181 m), Three-Mile Canyon (1,883 m), Canyon de Valle (1,835 m), Ancho Canyon (1,143 m), Canada del Buey (700 m), Sandia Canyon (221 m), DP Canyon (159 m) and Chaquehui Canyon (50 m). Effluent Canyon, Fence Canyon and Potrillo Canyon were surveyed but no areas of riparian habitat were found. Stretches of inventoried riparian habitat were classified for prioritization of treatment, if any was recommended. High priority sites included stretches of Mortandad Canyon, LA Canyon, Pajarito Canyon, Two-Mile Canyon, Sandia Canyon and Water Canyon. Recommended treatment for high priority sites includes placement of objects into the stream channel to encourage sediment deposition, elimination of channel incision, and to expand and slow water flow across the floodplain. Additional stretches were classified as lower priority, and, for other sites it was recommended that feral cattle and exotic plants be removed to aid in riparian habitat recovery. In June 2011 the Las Conchas Wildfire burned over 150,000 acres of land in the Jemez Mountains and surrounding areas. The watersheds above LA Canyon, Water Canyon and Pajarito Canyon were burned in the Las Conchas Wildfire and flooding and habitat alteration were observed in these canyon bottoms (Wright 2011). Post fire status of lower priority areas may change to higher priority for some of the sites surveyed prior to the Las Conchas Wildfire, due to changes in vegetation cover in the adjacent upland watershed.

Norris, Elizabeth J. [Los Alamos National Laboratory; Hansen, Leslie A. [Los Alamos National Laboratory; Hathcock, Charles D. [Los Alamos National Laboratory; Keller, David C. [Los Alamos National Laboratory; Zemlick, Catherine M. [Los Alamos National Laboratory

2012-03-29

405

Los Alamos National Laboratory W76 Pit Tube Lifetime Study  

SciTech Connect

A metallurgical study was requested as part of the Los Alamos National Laboratory (LANL) W76-1 life-extension program (LEP) involving a lifetime analysis of type 304 stainless steel pit tubes subject to repeat bending loads during assembly and disassembly operations at BWXT/Pantex. This initial test phase was completed during the calendar years of 2004-2006 and the report not issued until additional recommended tests could be performed. These tests have not been funded to this date and therefore this report is considered final. Tubes were reportedly fabricated according to Rocky Flats specification P14548 - Seamless Type 304 VIM/VAR Stainless Steel Tubing. Tube diameter was specified as 0.125 inches and wall thickness as 0.028 inches. A heat treat condition is not specified and the hardness range specification can be characteristic of both 1/8 and 1/4 hard conditions. Properties of all tubes tested were within specification. Metallographic analysis could not conclusively determine a specified limit to number of bends allowable. A statistical analysis suggests a range of 5-7 bends with a 99.95% confidence limit. See the 'Statistical Analysis' section of this report. The initial phase of this study involved two separate sets of test specimens. The first group was part of an investigation originating in the ESA-GTS [now Gas Transfer Systems (W-7) Group]. After the bend cycle test parameters were chosen (all three required bends subjected to the same amount of bend cycles) and the tubes bent, the investigation was transferred to Terri Abeln (Metallurgical Science and Engineering) for analysis. Subsequently, another limited quantity of tubes became available for testing and were cycled with the same bending fixture, but with different test parameters determined by T. Abeln.

Abeln, Terri G. [Los Alamos National Laboratory

2012-04-25

406

Los Angeles and Its Influence on Professional and Popular Astronomy - A Hollywood Love Story, by Lewis Chilton, Past President, Optical Shop Director and Historian, Los Angeles Astronomical Society  

NASA Astrophysics Data System (ADS)

The purpose of this presentation is to show through visualizations how the Los Angeles, California milieu of the early 20th century benefited the advancement of astronomy and captured the public consciousness through popular press accounts of these advancements and of the scientists who made them. The thesis of this presentation purports that a symbiosis developed between astronomers of Los Angeles-area scientific and educational institutions and a local community of interested laypersons, and was the catalyst that sparked future generations to enter the fields of astronomy, the allied sciences, education and technology. This presentation attempts to highlight the importance of continued public outreach by the professional astronomical community, for the ultimate benefit to itself, in Los Angeles and beyond.

Chilton, Lew

2013-01-01

407

The seafloor off Greater Los Angeles: Visualizing Gigabytes of Data  

NASA Astrophysics Data System (ADS)

The seafloor off the greater Los Angeles area was mapped with three different high-resolution multibeam echosounders over a period of three field seasons. The mapping was untaken to provide a base map for ongoing marine geological studies in the area. The combined data set covers the entire continental shelf and basin slope from as shallow as the 20-m isobath (in some places the 5-m isobath) on the inner shelf to the 800-m isobath on the basin floor. These data represent more than 5 billion georeferenced depth soundings that cover an area of more than 1000 km2. In addition, each depth sounding location has an associated acoustic backscatter value, thereby effectively doubling the data volume that needs to be visualized. And, when the land area DEM is draped with Landsat imagery, the dataset enlarges to more than 6 billion points. The data can be visualized with many standard GIS packages but statically investigating 2D map views of such a large dataset, one view at a time, is cumbersome and can be tedious. In addition, the bathymetric data have various spatial resolutions that depend on the water depth. A dynamically interactive 3D visualization package that allows georeferenced datasets of mixed spatial resolutions was chosen to enhance the interpretation phase of the dataset. Some of the capabilities of this software will be demonstrated during the presentation. The bathymetric data reveal the complex nature of this basin-margin environment. Large debris avalanches have scarred the basin slope off the Palos Verdes Peninsula. Undercutting along the base of the basin slope suggests current erosion. The morphologies of the submarine canyons in the area range in complexity from a simple single canyon channel, such as Redondo Canyon, to a complex system of canyon channels, such as Newport and San Gabriel Canyons. Distinctive small canyon morphologies suggests the possibility of fresh-water springs outcropping along the San Pedro upper basin slope and along the mid and lower basin slope. Large sections of the southern portion of the margin appear to be slowly creeping downslope. The continental shelves in the area vary from sediment covered with fields of bedforms to areas of rock outcrops. Linear trends of outcrops on the San Pedro shelf suggest previously unmapped structural trends. Very little of the floors of Santa Monica and San Pedro Basins have been mapped. However, the areas that have been mapped show a succession of channel downcuts that suggest tectonic uplift of San Pedro Basin as well as debris deposits and channel meanders.

Gardner, J. V.

2002-12-01

408

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

409

Molecular basis for Duarte and Los Angeles variant galactosemia.  

PubMed Central

Human orythrocytes that are homozygous for the Duarte enzyme variant of galactosemia (D/D) have a characteristic isoform on isoelectric focusing and 50% reduction in galactose-1-phosphate uridyltransferase (GALT) enzyme activity. The Duarte biochemical phenotype has a molecular genotype of N314D/N314D. The characteristic Duarte isoform is also associated with a variant called the "Los Angeles (LA) phenotype," which has increased GALT enzyme activity. We evaluated GALT enzyme activity and screened the GALT genes of 145 patients with one or more N314D-containing alleles. We found seven with the LA biochemical phenotype, and all had a 1721C-->T transition in exon 7 in cis with the N314D missense mutation. The 1721C-->T transition is a neutral polymorphism for leucine at amino acid 218 (L218L). In pedigree analyses, this 1721C-->T transition segregated with the LA phenotype of increased GALT activity in three different biochemical phenotypes (LA/N, LA/G, and LA/D). To determine the mechanism for increased activity of the LA variant, we compared GALT mRNA, protein abundance, and enzyme thermal stability in lymphoblast cell lines of D and LA phenotypes with comparable genotypes. GALT protein abundance was increased in LA compared to D alleles, but mRNA was similar among all genotypes. When LA/D and D/D GALT biochemical phenotypes were compared to N/N GALT phenotypes, both had 50%, as compared to 21%, reduction in GALT activity in the wild type (N/N) after exposure at identical initial enzyme activity to 50 degrees C for 15 min. We conclude that the codon change N314D in cis with the base-pair transition 1721C-->T produces the LA variant of galactosemia and that this nucleotide change increases GALT activity by increasing GALT protein abundance without increasing transcription or decreasing thermal lability. A favorable codon bias for the mutated codon with consequently increased translation rates is postulated as the mechanism. Images Figure 1 Figure 2

Langley, S D; Lai, K; Dembure, P P; Hjelm, L N; Elsas, L J

1997-01-01

410

75 FR 52969 - Rim of the Valley Corridor Special Resource Study, Los Angeles and Ventura Counties, CA; Notice...  

Federal Register 2010, 2011, 2012, 2013

...Service Rim of the Valley Corridor Special Resource Study, Los Angeles and Ventura Counties...assess potential impacts of alternative resource protection and other considerations within the Rim of the Valley Corridor Special Resource Study area in Los Angeles and...

2010-08-30

411

Los Alamos National Laboratory (USA): Instituto Mexicano Del Petroleo Cooperative Program for the ASPEN Flowsheet Simulator: Status Report.  

National Technical Information Service (NTIS)

On June 20, 1983, the Los Alamos National Laboratory, the US Department of Energy, and the Instituto Mexicano del Petroleo (IMP) signed a Memorandum of Understanding (MOU) that established a program of cooperation between the Los Alamos National Laborator...

T. T. Phillips

1987-01-01

412

76 FR 414 - Tier 1 Environmental Impact Statement for the Los Angeles to San Luis Obispo (LOSSAN North) Rail...  

Federal Register 2010, 2011, 2012, 2013

...Angeles to San Luis Obispo (LOSSAN North) Rail Corridor Improvements Studies: Los Angeles...environmental impact report (EIR) for rail corridor improvements to the Los Angeles to San Luis Obispo (LOSSAN North) rail corridor (LOSSAN North Program)....

2011-01-04

413

Los Alamos National Laboratory: 21st century solutions to urgent national challenges  

SciTech Connect

Los Alamos National Laboratory has been called upon to meet urgent national challenges for more than 65 years. The people, tools, and technologies at Los Alamos are a world class resource that has proved decisive through our history, and are needed in the future. We offer expertise in nearly every science, technology, and engineering discipline, a unique integrated capability for large-scale computing and experimentation, and the proven ability to deliver solutions involving the most complex and difficult technical systems. This white paper outlines some emerging challenges and why the nation needs Los Alamos, the premier National Security Science Laboratory, to meet these challenges.

Mcbranch, Duncan [Los Alamos National Laboratory

2008-01-01

414

Dinámica y crecimiento de los granos de polvo en la nebulosa protoplanetaria  

NASA Astrophysics Data System (ADS)

En el escenario estándar de la formación planetaria, los planetesimales (cuerpos de tamaño kilométrico) crecen a partir de granos de polvo, similares a los interestelares, embebidos en un disco gaseoso denominado nebulosa protoplanetaria. Durante esta etapa, los movimientos del gas pueden tener gran influencia en la dinámica y el crecimiento de los granos de polvo, dado que el flujo kepleriano del gas frena el movimiento de los mismos haciendo que caigan hacia el Sol, y la turbulencia inhibe la inestabilidad gravitacional de la capa de polvo. Aunque se acepta que los planetesimales fueron los elementos constituyentes de los planetas, todavía se desconoce cómo se produjo la formación de los mismos. Por esta razón, en los estudios más recientes, existe un renovado interés por comprender mejor la evolución de la capa de polvo inmersa en el disco gaseoso de la Nebulosa. El gas que fluye en el disco puede engendrar estructuras carentes de simetría axial, como por ejemplo ondas espirales y vórtices, a partir de gran variedad de mecanismos de excitación e inestabilidad. En 1995, Barge y Sommeria pusieron de manifiesto que la existencia de vórtices gaseosos persistentes en la nebulosa solar tendría importantes consecuencias sobre la formación de los planetesimales y el posterior crecimiento de los planetas gigantes. La investigación desarrollada en esta Tesis analiza la relación entre el polvo y el gas debida al acoplamiento por fricción dinámica entre ambos; en concreto, se estudia el efecto del flujo medio del gas sobre la dinámica de las partículas de polvo. El primer objetivo es investigar en profundidad los procesos de captura y crecimiento de los granos de polvo dentro de un vórtice y su posible relevancia en cuanto a la formación de los planetesimales. El segundo objetivo es la exploración de los efectos de ondas espirales propagándose en el disco gaseoso sobre la dinámica y el crecimiento de las partículas. La presencia de líneas de corriente no circulares perturba significativamente el movimiento de las partículas alrededor del Sol e incrementa su vida media en la Nebulosa. El flujo medio del gas se modela de forma simple, analizándose la dinámica y el crecimiento de las partículas mediante simulaciones numéricas. Al incrementarse la vida media y la densidad superficial de las partículas sólidas, los mecanismos de confinamiento derivados de la presencia de vórtices y ondas espirales actuan sobre el material sólido de la Nebulosa (mediante agregación colisional o inestabilidades gravitacionales) de manera mucho más eficiente que la previamente considerada. Esto ofrece nuevas posibilidades para la formación de planetesimales y núcleos de planetas gigantes, y puede explicar la formación rápida de planetas extrasolares gigantes. Además, esta Tesis analiza la respuesta de las partículas, en un disco protoplanetario con un radio de 100 UA en torno a una estrella de tipo solar, al campo gravitatorio derivado de la presencia de dos estrellas compañeras ligadas en una órbita relativamente elongada (300-1600 UA). Para llevar a cabo este análisis, se han realizado una serie de simulaciones numéricas de configuraciones jerárquicas coplanares utilizando un programa FORTRAN que integra directamente las ecuaciones del movimiento con el objeto de modelar la presencia de las fuerzas gravitacionales y viscosas. El disco protoplanetario masivo se encuentra en torno a una de las componentes de la binaria. La evolución temporal del subdisco de polvo depende directamente de la naturaleza (directa o retrógrada) de la revolución relativa de la compañera estelar, y de la temperatura y la masa del disco circunestelar.

de La Fuente Marcos, Carlos

2001-06-01

415

insURGEnCiA Y REPREsiÓn. ACERCA DE LA TEORÍA DE LOs DOs DEMOniOs  

Microsoft Academic Search

Resumen: La conocida en Argentina como Teoría o tesis de los dos demonios se ha utilizado para, si no justificar, sí al menos querer dar una explica - ción simplista al advenimiento del golpe del gene- ral Videla y la consiguiente dictadura conocida en Argentina como el Proceso. El artículo analiza los discursos e imágenes sobre cada uno de los

José Manuel Barrio Terol

416

El mercado financiero y el racionamiento del crédito. Estudio del caso de los gobiernos regionales en España  

Microsoft Academic Search

En los últimos años se ha suscitado un interesante debate sobre la forma más efectiva de restringir las políticas fiscales que suponen un comportamiento crediticio irresponsable en el seno de la Unión Económica y Monetaria. En este sentido, se ha argumentado que los mercados financieros pueden jugar un papel importante en el control de los gobiernos públicos con pautas de

Nuria Alcalde Fradejas; Jaime Vallés Giménez

2002-01-01

417

Pensamiento, discurso y políticas económico-sociales bajo los gobiernos latinoamericanos de Hugo Chávez y Evo Morales  

Microsoft Academic Search

Los estudios sociopolíticos de las sociedades latinoamericanas actuales parecen presentar al menos dos facetas características bien definidas: una de ellas enfatiza en los aspectos netamente académicos de los innumerables temas e interrogantes existentes a nivel continental, mientras que la otra parece mantener un viejo perfil de intencionalidad política y que tiende a confundir aún más el complejo y disímil panorama

José Leopoldo Montesino Jerez

2008-01-01

418

New Facility for Ion Beam Materials Characterization and Modification at Los Alamos.  

National Technical Information Service (NTIS)

The Ion Beam Materials Laboratory (IBML) is a new Los Alamos laboratory devoted to the characterization and modification of the near surfaces of materials. The primary instruments of the IBML are a tandem electrostatic accelerator, a National Electrostati...

J. R. Tesmer C. J. Maggiore D. M. Parkin

1988-01-01

419

Nueva Publicacion Habla de las Necesidades de los Sobrevivientes de cancer Latinos y sus Familias  

Cancer.gov

Esta publicación gratuita combina la información más actual de los profesionales de la salud con anécdotas personales de sobrevivientes de cáncer latinos, sobre cómo enfrentarse a la vida después del tratamiento del cáncer

420

Recent experiments with the free-electron laser at Los Alamos  

SciTech Connect

Improvements in the operational characteristics of the Los Alamos free-electron laser have produced experimental results in reasonable agreement with theory and simulation. The results of these experiments will be described. 16 refs., 5 figs.

Feldman, D.W.; Warren, R.W.

1989-01-01

421

Health Hazard Evaluation Report No. HHE-80-68-871, Sinclair Paint Company, Los Angeles, California.  

National Technical Information Service (NTIS)

Environmental and personal samples were analyzed for vinyl-acetate (108054), ethyl-acrylate (140885), and butyl-acrylate (141322), and medical interviews were conducted with three workers at the Sinclair Paint Company (SIC-2851) in Los Angeles, California...

P. L. Belanger M. J. Coye

1981-01-01

422

Instantánea de los cánceres de hígado y de las vías biliares  

Cancer.gov

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

423

Development and Application of the Los Alamos Nuclear Microprobe: Hardware, Software, and Calibration.  

National Technical Information Service (NTIS)

There is a great demand for spatially resolved quantitative trace element analyses of geologic samples. This class of samples is characteristically heterogeneous, fine grained, and compositionally complex. The Los Alamos nuclear microprobe has been develo...

T. M. Benjamin P. S. Z. Rogers C. J. Duffy J. F. Conner C. J. Maggiore

1985-01-01

424

Evaluation of the Los Angeles County Juvenile Drug Treatment Boot Camp. Executive Summary.  

National Technical Information Service (NTIS)

This report presents findings from an evaluation of the Drug Treatment Boot Camp in Los Angeles County. To overcome common methodological problems of earlier studies, this project applied both cross-sectional and longitudinal strategies with a combination...

S. X. Zhang

2001-01-01

425

Near-Term Options for Improving Security at Los Angeles International Airport.  

National Technical Information Service (NTIS)

Commissioned by Los Angeles World Airports (LAWA), this study examines near-term options for reducing the terrorist threat to LAX. Although the study has considered many possible terrorist threats and responses, the study results presented here focus on a...

D. Stevens T. Schell T. Hamilton R. Mesic M. S. Brown

2004-01-01

426

Validation of the Los Angeles County Probation Department's Risk and Needs Assessment Instruments.  

National Technical Information Service (NTIS)

As with much of the nation, Los Angeles County's crime and arrest rates fell during the 1990s. While overall rates declined, however, the proportion of violent offenses reported continued to rise throughout the decade. Felony arrests for violent offenses ...

S. Turner T. Fain

2003-01-01

427

An Assessment of Community Planning for Mass Transit. Volume 6. Los Angeles Case Study.  

National Technical Information Service (NTIS)

The report on urban transportation planning in the Los Angeles metropolitan area is one of nine case studies undertaken by the Office of Technology Assessment to provide an information base for an overall assessment of community planning for mass transit....

1976-01-01

428

Los Angeles FOT Spread Spectrum Radio Traffic Signal Interconnect Evaluation Task: Final Report on Full Deployment.  

National Technical Information Service (NTIS)

Spread spectrum radio technology, in addition to being widely used in military applications, holds enormous promise for commercial applications. The City of Los Angeles is investigating the use of spread spectrum radio networks (SSRN) for traffic monitori...

1998-01-01

429

76 FR 36148 - Notice of Inventory Completion: Fowler Museum at UCLA, Los Angeles, CA  

Federal Register 2010, 2011, 2012, 2013

...Notice of Inventory Completion: Fowler Museum at UCLA, Los Angeles, CA AGENCY: National...SUMMARY: The Fowler Museum at UCLA has completed an inventory of...the human remains may contact the Fowler Museum at UCLA. Disposition of the human...

2011-06-21

430

Los Alamos Benchmarks: Calculations Based on ENDF/B-V Data.  

National Technical Information Service (NTIS)

The new and revised benchmark specifications for nine Los Alamos National Laboratory critical assemblies are used to compute the entire set of parameters that were measured in the experiments. A comparison between the computed and experimental values prov...

R. B. Kidman

1981-01-01

431

Safety Analysis of the Los Alamos Critical Experiments Facility. Volume II.  

National Technical Information Service (NTIS)

The Los Alamos critical assembly layout is designed to facilitate personnel protection by means of remote operation and stringent procedural controls during nonoperating periods. Public protection is straightforward because of the small fission-product in...

H. C. Paxton

1976-01-01

432

Human Ecology and the Metropolitan Environment: Environmental Hazards in Los Angeles.  

National Technical Information Service (NTIS)

The monograph portrays the social nature of environmental hazards in an American metropolis. It is concerned with air pollution in Los Angeles and Orange Counties. The hazard is compared with airplane noise, brush fires, floods, and slides; to indicate th...

M. D. Van Arsdol F. Alexander G. Sabagh

1966-01-01

433

Los Angeles Culinary Union Dental Clinic: A Labor - Management Welfare Fund Experiments with a Dental Benefit.  

National Technical Information Service (NTIS)

The Los Angeles Hotel - Restaurant Employer - Union Welfare Fund, established in 1952 and modified in 1954 to include dental insurance benefits, is described. The agreement establishing the fund stipulated what benefits were to be offered and how they wer...

A. J. Viseltear A. I. Kisch

1967-01-01

434

Water quality improvement by implementation of Proposition O in the Los Angeles river watershed, California.  

PubMed

Proposition O was created to help the City of Los Angeles comply with the Total Maximum Daily Load (TMDL) requirements under the Clean Water Act. In this study, the effectiveness of the Proposition O projects in Los Angeles River watershed was examined to show whether it achieves the goal of meeting water quality standards. Our analysis shows the most effective single project will remove at most 2% of pollutant loads from Los Angeles River Watershed and will not achieve TMDL compliance, although several projects can make important contributions to achieve compliance. The ranking results show that the projects that treat the runoff from the largest drainage area have the greatest impact on the water quality of Los Angeles river. PMID:19092205

Park, Mi-Hyun; Pincetl, Stephanie; Stenstrom, Michael K

2008-01-01

435

Instantánea de los cánceres de cerebro y del sistema nervioso central  

Cancer.gov

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

436

Los Angeles Finds Recycling Success with Multi-Lingual Public Education.  

ERIC Educational Resources Information Center

Describes a program established in Los Angeles to introduce curbside recycling and automated trash collection to multilingual residents. Discusses a grass-roots community-based outreach strategy designed to change attitudes toward waste. (LZ)

Silva, Roland

1995-01-01

437

Los desafíos de tratar con las atmósferas: Entrada, Descenso y Aterrizaje  

NASA Video Gallery

Ya sea aterrizando en Marte o de regreso a la Tierra, uno de los mayores desafíos de cualquier misión es la entrada, descenso y aterrizaje. Solo piense -- una nave espacial que pasa volando a toda ...

438

SRTM Anaglyph: Meseta de Somuncura, Patagonia, Argentina (Near Los Menucos)  

NASA Technical Reports Server (NTRS)

The Meseta de Somuncura is a semi-arid basalt plateau in northern Patagonia. This view of the northwestern part of the plateau, near Los Menucos, Argentina, shows numerous depressions where the upper basalt layers are missing or collapsed. Collapse occurs above voids in the underlying rock. These voids might have been caused by lava tubes carrying away molten lava from under the cooled and solidified surface of a lava flow. Alternatively, voids might result when ground water dissolves carbonate (limestone) or evaporite (salt) deposits that the lava may be covering.

Many of the depressions have salty lakes. Light wind streaks downwind (eastward) from the lakes show that salt crystals blow off the lake beds during dry times. Some eroded sand and silt debris from the basalt must also blow downwind, but the degree to which wind plays a role in the erosion of the depressions is not clear.

This anaglyph was generated by first draping a Landsat Thematic Mapper image over a topographic map from the Shuttle Radar Topography Mission, then producing the 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 the right eye with a blue filter.

Landsat satellites have provided visible light and infrared images of the Earth continuously since 1972. SRTM topographic data match the 30-meter (99-foot) spatial resolution of most Landsat images and provide a valuable complement for studying the historic and growing Landsat data archive. The Landsat 7 Thematic Mapper image used here was provided to the SRTM project by the United States Geological Survey, Earth Resources Observation Systems (EROS) Data Center,Sioux Falls, South Dakota.

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: 30 kilometers (19 miles) x 40 kilometers (25 miles) Location: 41.0 deg. South lat., 67.7 deg. West lon. Orientation: North toward upper left Image Data: Landsat band 4 (near infrared) Date Acquired: February 19, 2000 (SRTM), January 22, 2000 (Landsat) Image: NASA/JPL/NIMA

2000-01-01

439

Geology of Los Azufres Caldera, Mexico, and its relationships with regional tectonics  

Microsoft Academic Search

Ferrari, L., Gardufio, V.H., Pasquar6, G. and Tibaldi, A., 1991. Geology of Los Azufres caldera, Mexico, and its relationships with regional tectonics. In: S.P Verma (Editor), Calderas: Genesis, Structure and Unrest. J. Volcanol. Geotherm. Res., 47: 129-148. The Los Azufres geothermal field is one of several silicic centres of the Mexican Volcanic Belt (MVB) for which a caldera structure was

L. Ferrari; V GARDUNO; G PASQUARE; A TIBALDI

1991-01-01

440

Motor exhaust emissions as a primary source of dicarboxylic acids in Los Angeles ambient air  

Microsoft Academic Search

Low molecular weight dicarboxylic acids (Câ-Cââ) were analyzed in Los Angeles air and auto exhaust, as well as greenhouse air, soil, dust, and bog sediment samples, as dibutyl esters by gas chromatography and gas chromatography-mass spectrometry with fused silica capillary columns. In the Los Angeles ambient atmosphere, 19 dicarboxylic acids in the range Câ-Cââ were identified, including straight-chain, branched-chain, cis-

Kimitaka Kawamura; Isaac R. Kaplan

1987-01-01

441

The rise in methamphetamine use among American Indians in Los Angeles County.  

PubMed

A preliminary review of substance abuse treatment admission data from 2001-2005 was conducted to explore the use of methamphetamine among American Indians in treatment programs funded by Los Angeles County. Comparisons were made between primary methamphetamine users and users whose primary drug was a substance other than methamphetamine. In that period, the number of American Indians reporting methamphetamine as their primary drug in Los Angeles County significantly increased, particularly among females. PMID:17874362

Spear, Suzanne; Crèvecoeur, Desirée A; Rawson, Richard A; Clark, Rose

2007-01-01

442

Shortening and thickening of metropolitan Los Angeles measured and inferred by using geodesy  

Microsoft Academic Search

Geodetic observations using the Global Positioning System (GPS) and other techniques record a high rate of north-south shortening in an east-southeast trending, 5 40-km-wide belt in northern metropolitan Los Angeles, California. Downtown Los Angeles is observed to be converging upon the southern San Gabriel Mountains at 6 mm\\/yr. Aside from the elastic strain that will be released during earthquakes rupturing

Donald F. Argus; Michael B. Heflin; Andrea Donnellan; Frank H. Webb; Danan Dong; Kenneth J. Hurst; David C. Jefferson; Gregory A. Lyzenga; Michael M. Watkins; James F. Zumberge

1999-01-01

443

Gay, Mexican and immigrant: intersecting identities among gay men in Los Angeles  

Microsoft Academic Search

This paper draws on a multi-sited ethnographic research study of sexual identity formation among self-identified gay Mexican men in Los Angeles, Mexico City and Cuernavaca. Relying primarily on in-depth interviews with 24 gay immigrant men and extensive participant observation in Los Angeles, this research explores the intersection of sexuality, social class, ethnicity and immigration in the participants' daily lives and

James Thing

2010-01-01

444

Análisis de sensibilidad en elasticidad mediante el método de los elementos de contorno  

Microsoft Academic Search

Se presenta en este artículo una revisión completa del análisis de sensibilidad para los funcionales más\\u000ahabituales en Elasticidad, en base al enfoque continuo del problema, teniendo en cuenta los conceptos de\\u000aderivada material y problema adjunto. La precisión en el cálculo de las sensibilidades depende en gran\\u000amedida de la precisión en el cálculo de las tensiones y deformaciones

Elena Calvo; Luis Gracia

1970-01-01

445

Efectos derivados de la puesta en pr ctica del marketing de relaciones en los servicios profesionales  

Microsoft Academic Search

El objetivo del presente trabajo es identificar la influencia sobre el consumidor y sobre el resultado empresarial de dos dimensiones b sicas de los servicios profesionales: la dimensi¢n formal o calidad del servicio prestado y la dimensi¢n informal o interacci¢n personal con el cliente. Sobre la base te¢rica del marketing de relaciones, se analiza c¢mo influyen los aspectos formales e

Paolo Freire de Carvalho Filho; Carmen Camarero Izquierdo

2003-01-01

446

Estudio de los hábitos alimentarios de niños de 4-6 años de Reynosa, Tamaulipas (México)  

Microsoft Academic Search

Se estudiaron los hábitos alimentarios de niños de 4 a 6 años en Reynosa, Tamaulipas (México) para determinar el riesgo de problemas nutricionales derivados del sobrepeso y obesidad. Se estudiaron las dietas de 999 niños. La ingesta de calorías en los niños (1457,10 ± 22,30 kcal) fue significativamente mayor que en las niñas (1345,69 ± 20,58 kcal). Un comportamiento similar se observó para la mayoría

O. Castillo-Ruiz; G. Velazquez; R. M. Uresti-Marín; N. Mier; M. Vázquez; J. A. Ramírez de León

2012-01-01

447

El Parlamento Europeo lamenta la situación de los derechos humanos en China, su Presidente no acudirá a la ceremonia de inauguración de los JJOO  

Microsoft Academic Search

Reporteros sin Fronteras se felicita de que, el 10 de julio de 2008, el Parlamento Europeo haya aprobado una resolución sobre la situación en China tras el terremoto y antes de los Juegos Olímpicos. El Parlamento Europeo se ha posicionado auténticamente a favor de la libertad de expresión, ya que “lamenta que las relaciones con China no hayan progresado más

Reporteros sin Fronteras

2008-01-01

448

LOS CUERPOS FICTICIOS DE LA BIOMEDICINA. EL PROCESO DE CONSTRUCCIÓN DEL GÉNERO EN LOS PROTOCOLOS MÉDICOS DE ASIGNACIÓN DE SEXO EN BEBÉS INTERSEXUALES  

Microsoft Academic Search

Resumen El nacimiento de un bebé del cual no se puede decir si es niña o niño con una simple inspección visual, supone la activación de una serie de resortes médicos y tecnológicos dirigidos a desvelar qué se oculta detrás de tal indefinición genital. Todos los esfuerzos dedicados a elaborar categorías, definiciones, criterios y protocolos para diagnosticar tal ambigüedad, así

Nuria Gregori Flor

449

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

450

Interactions of Haemophilus parasuis and its LOS with porcine brain microvascular endothelial cells.  

PubMed

Haemophilus parasuis is a swine pathogen that causes Glässer's disease, which is characterized by polyserositis and meningitis. The pathogenesis of the H. parasuis infection is poorly understood. To cause meningitis, H. parasuis has to cross the blood-brain barrier (BBB) to gain access to the central nervous system (CNS). We recently showed that H. parasuis adheres to and invades porcine brain microvascular endothelial cells (PBMEC). The aim of this study was to evaluate the role of H. parasuis lipooligosaccharide (LOS) in the adhesion to PBMEC and to determine if H. parasuis (and/or its LOS) is able to induce apoptosis and activation of PBMEC. Results showed that adhesion of H. parasuis to PBMEC was partially mediated by LOS. Moreover, H. parasuis induces caspase-3-mediated apoptosis of PBMEC in a time--and dose--dependent manner, but its LOS did not seem to be involved in such a process. Furthermore, H. parasuis and, to a lesser extent, its LOS, was able to induce the release of IL-8 and IL-6 by PBMEC. Field strains of H. parasuis serotypes 4 and 5 induced similar levels of these inflammatory mediators. Our data suggest that H. parasuis uses cellular adhesion, induction of apoptosis and up-regulation of inflammatory mediators as mechanisms to invade the CNS via the BBB, and that LOS would play a certain but limited role in such pathological process. PMID:18387279

Bouchet, Bénédicte; Vanier, Ghyslaine; Jacques, Mario; Gottschalk, Marcelo

2008-01-01

451

Los Alamos climatology summary including latest normals from 1961--1990  

SciTech Connect

This report contains a summary of Los Alamos climate and analyses of basic weather variables from late 1910 through 1991. The first few sections offer a description of the local geography and large-scale weather patterns that affect Los Alamos. Temperature and precipitation analyses are presented in the next few sections. Updated 30-year temperature and precipitation normals ending in 1990 are shown for Los Alamos and White Rock. Normal snowfall is also shown for Los Alamos. Extremes of temperature, precipitation, and snowfall and averages of weather variables are also given. A section then discusses the changes of the latest 30-year normals. Another section describes the winds in Los Alamos. Brief descriptions of, humidity, sunshine, atmospheric pressure, and pollutant dispersal appear in the following sections. The report ends with brief descriptions of other weather phenomena that occur in Los Alamos. Appendices include locations of weather stations, normal heating and cooling degree-days, growing-season data, and English/metric unit conversions.

Bowen, B.M.

1992-03-01

452

Multimedia contaminant environmental exposure assessment methodology as applied to Los Alamos, New Mexico  

SciTech Connect

The MCEA (Multimedia Contaminant Environmental Exposure Assessment) methodology assesses exposures to air, water, soil, and plants from contaminants released into the environment by simulating dominant mechanisms of contaminant migration and fate. The methodology encompasses five different pathways (i.e., atmospheric, terrestrial, overland, subsurface, and surface water) and combines them into a highly flexible tool. The flexibility of the MCEA methodology is demonstrated by encompassing two of the pathways (i.e., overland and surface water) into an effective tool for simulating the migration and fate of radionuclides released into the Los Alamos, New Mexico region. The study revealed that: (a) the /sup 239/Pu inventory in lower Los Alamos Canyon increased by approximately 1.1 times for the 50-y flood event; (b) the average contaminant /sup 239/Pu concentrations (i.e., weighted according to the depth of the respective bed layer) in lower Los Alamos Canyon for the 50-y flood event decreased by 5.4%; (c) approx. 27% of the total /sup 239/Pu contamination resuspended from the entire bed (based on the assumed cross sections) for the 50-y flood event originated from lower Pueblo Canyon; (d) an increase in the /sup 239/Pu contamination of the bed followed the general deposition patterns experienced by the sediment in Pueblo-lower Los Alamos Canyon; likewise, a decrease in the /sup 239/Pu contamination of the bed followed general sediment resuspension patterns in the canyon; (e) 55% of the /sup 239/Pu reaching the San Ildefonso Pueblo in lower Los Alamos Canyon originated from lower Los Alamos Canyon; and (f) 56% of the /sup 239/Pu contamination reaching the San Ildefonso Pueblo in lower Los Alamos Canyon was carried through towards the Rio Grande. 47 references, 41 figures, 29 tables.

Whelan, G.; Thompson, F.L.; Yabusaki, S.B.

1983-02-01

453

Rediseno de un incinerador convencional para la incineracion de desechos radiactivos de bajo nivel. (Conventional incinerator redesign for the incineration of low level radioactive solid wastes.).  

National Technical Information Service (NTIS)

From several years ago have been detected some problems with the storage of low level radioactive solids wastes, they are occasioned growth in volume and weight, one of most effective treatment for its reduction, the incineration has been. In the work was...

L. E. C. Lara

1997-01-01

454

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

455

Evaluation of Macroinvertebrate Communities and Habitat for Selected Stream Reaches at Los Alamos National Laboratory  

SciTech Connect

This is the second aquatic biological monitoring report generated by Los Alamos National Laboratory's (LANL's) Water Quality and Hydrology Group. The study has been conducted to generate impact-based assessments of habitat and water quality for LANL waterways. The monitoring program was designed to allow for the detection of spatial and temporal trends in water and habitat quality through ongoing, biannual monitoring of habitat characteristics and benthic aquatic macroinvertebrate communities at six key sites in Los Alamos, Sandia, Water, Pajarito, and Starmer's Gulch Canyons. Data were collected on aquatic habitat characteristics, channel substrate, and macroinvertebrate communities during 2001 and 2002. Aquatic habitat scores were stable between 2001 and 2002 at all locations except Starmer's Gulch and Pajarito Canyon, which had lower scores in 2002 due to low flow conditions. Channel substrate changes were most evident at the upper Los Alamos and Pajarito study reaches. The macroinvertebrate Stream Condition Index (SCI) indicated moderate to severe impairment at upper Los Alamos Canyon, slight to moderate impairment at upper Sandia Canyon, and little or no impairment at lower Sandia Canyon, Starmer's Gulch, and Pajarito Canyon. Habitat, substrate, and macroinvertebrate data from the site in upper Los Alamos Canyon indicated severe impacts from the Cerro Grande Fire of 2000. Impairment in the macroinvertebrate community at upper Sandia Canyon was probably due to effluent-dominated flow at that site. The minimal impairment SCI scores for the lower Sandia site indicated that water quality improved with distance downstream from the outfall at upper Sandia Canyon.

L.J. Henne; K.J. Buckley

2005-08-12

456

La jerarquía de efectos clísica de alta involucraciín para la comprensión de la conducta de reciclaje considerando los valores de los consumidores  

Microsoft Academic Search

Resumen  El presente trabajo tiene por objeto estimar y seleccionar el modelo con jerarquía de efectos clásica que mejor represente\\u000a el comportamiento de reciclado del consumidor y, posteriormente, profundizar en las particularidades que este modelo muestra\\u000a en función de tres valores: el colectivismo, el materialismo y el logro. Los resultados del trabajo empírico ponen de manifiesto\\u000a la validez de este modelo

Gonzalo DíaznMeneses; Asunción Beerli Palacio

2004-01-01

457

West Nile Virus Emergence and Persistence in Los Angeles, California, 2003-2008  

PubMed Central

West Nile virus (WNV) invaded Los Angeles in September 2003, and during the subsequent five-year period followed a pattern of amplification, subsidence, and resurgence. Enzootic transmission was tracked by abundance and infection incidence in Culex pipiens quinquefasciatus and Cx. tarsalis and by seroprevalence in peridomestic passerine birds, infection in dead birds, and seroconversions in sentinel chickens. Culex p. quinquefasciatus served as the primary vector of WNV, with gravid traps serving as the best sampling method and the most consistent indicator of viral activity. Spatial scan statistics applied to mosquito infection and positive dead bird data delimited three major clusters of WNV transmission, with introduction occurring in the Los Angeles Basin, and amplification and dispersal events carrying transmission to the San Fernando and Santa Clarita valleys. Los Angeles experienced major epidemics in 2004 and 2008, providing a unique opportunity to investigate specific patterns of enzootic amplification preceding epidemics.

Kwan, Jennifer L.; Kluh, Susanne; Madon, Minoo B.; Reisen, William K.

2010-01-01

458

A proposal for a long-pulse spallation source at Los Alamos National Laboratory  

SciTech Connect

Los Alamos National Laboratory is proposing a new spallation neutron source that will provide the US with an internationally competitive facility for neutron science and technology that can be built in approximately three years for less than $100 million. The establishment of a 1-MW, long-pulse spallation source (LPSS) at the Los Alamos Neutron Science Center (LANSCE) will meet many of the present needs of scientists in the neutron scattering community and provide a significant boost to neutron research in the US. The new facility will support the development of a future, more intense spallation neutron source, that is planned by DOE`s Office of Energy Research. Together with the existing short pulse spallation source (SPSS) at the Manual Lujan, Jr. Neutron Scattering Center (MLNSC) at Los Alamos, the new LPSS will provide US scientists with a complementary pair of high-performance neutron sources to rival the world`s leading facilities in Europe.

Pynn, R.; Weinacht, D.

1995-12-01

459

Ion-source and ion-accelerator development at Los Alamos  

SciTech Connect

Intense, low-emittance ion beam generation and acceleration is a primary, continuing research and development activity in the Accelerator Technology Division of the Los Alamos National Laboratory, USA. The types and characteristics of ion source, extraction, and beam-transport systems that we have tested and some of the improvements made to the design and simulation tools for components of injector systems are described. Acceleration of low-velocity ions has been revolutionized by the radio-frequency quadrupole (RFQ) accelerator, introduced in the USSR, pioneered at Los Alamos in the USA, and now under intense development around the world. Recent experimental results and extensions of design capabilities at Los Alamos are discussed.

Jameson, R.A.

1983-01-01

460

Wide-area Gigabit networking: Los Alamos HIPPI-SONET Gateway  

SciTech Connect

This paper describes a HIPPI-SONET Gateway which has been designed by members of the Computer Network Engineering Group at Los Alamos National Laboratory. The Gateway has been used in the CASA Gigabit Testbed at Caltech, Los Alamos National Laboratory, and the San Diego Supercomputer Center to provide communications between the sites. This paper will also make some qualitative statements as to lessons learned during the deployment and maintenance of this wide area network. We report record throughput for transmission of data across a wide area network. We have sustained data rates using the TCP/IP protocol of 550 Mbits/second and the rate of 792 Mbits/second for raw HIPPI data transfer over the 2,000 kilometers from the San Diego Supercomputer Center to the Los Alamos National Laboratory.

St. John, W.B.; DuBois, D.H.

1995-05-01

461

Aircraft Aerosol Mass Spectrometer Measurements over the Los Angeles Basin during CalNex  

NASA Astrophysics Data System (ADS)

An Aerodyne c-ToF Aerosol Mass Spectrometer was deployed on the CIRPAS Twin Otter in May 2010 during the CalNex field campaign. The aim of the campaign was to chemically characterize the Southern California aerosols. High organic aerosol loadings were measured downwind of downtown Los Angeles, and high sulfate loadings were observed near the Long Beach Harbor area. Nitrate and ammonium aerosol concentrations were highest in the northeastern portion of the Los Angeles Basin. The atomic O:C ratio of the aerosol was largest in the basin outflow through the Cajon and Banning passes than inside the Basin itself. A comparison of Los Angeles to Bakersfield urban aerosol is also presented.

Craven, J. S.; Metcalf, A. R.; Flagan, R. C.; Seinfeld, J.

2010-12-01

462

Three-Dimensional Velocity Model of the Los Angeles Region From Active Source Seismic Data  

NASA Astrophysics Data System (ADS)

In 1994, the USGS, along with several other institutions, ran an active source seismic survey through the Los Angeles basin, known as the Los Angeles Region Seismic Experiment (LARSE). This experiment had both offshore and onshore shots and receivers which were arranged in 3 lines, each crossing over or near the site of a major (M > 6.5) earthquake epicenter. The offshore component consisted of airgun shots recorded by onshore receivers, ocean bottom seismometers, and a digital streamer. The shots for this portion totaled 25,000, recorded by 10 OBS, a 160 4.2 km digital streamer and 170 single component Reftek DAS units. The on-shore component contained 62 shots along transect 1, recorded by 228 3-component Reftek DAS units, 187 single component SGR's, 183 single component PRS1's, 33 three-component PRS4's, and 18 three-component GEOS's. The goal of LARSE was to produce better images of basins in the the Los Angeles area than that produced by earthquake data. Here, we present a tomographic 3-D velocity model produced by inverting LARSE first arrival refraction travel time picks using the 'First Arrival Seismic Tomography Code (FAST)' (Zelt and Barton, 1998). 3-D ray coverage is best near the western edge of the Los Angeles basin, where the airgun data is recored by seismometers on all three lines. For the rest of the model, there is good 2-D coverage along the ends of the lines. Structures that are imaged include the Santa Monica Basin, the Palos Verdes Fault, the western edge of the Los Angeles Basin, and the San Andreas fault. The sensitivity of the model to perturbations of travel times was tested using the method of Doser et al. (1998). The model is then compared to other published models in order to enhance the understanding of the structures that underlay and surround the Los Angeles Basin.

Schramm, K. A.; Miller, K.; Okaya, D.; Fuis, G.

2002-12-01

463

Timing and duration of hydrothermal activity at the Los Bronces porphyry cluster: an update  

NASA Astrophysics Data System (ADS)

New geochronological data from the Los Bronces cluster of the Río Blanco-Los Bronces mega-porphyry Cu-Mo district establish a wide range of magmatism, hydrothermal alteration, and mineralization ages, both in terms of areal extent and time. The northern El Plomo and southernmost Los Piches exploration areas contain the oldest barren porphyritic intrusions with U-Pb ages of 10.8 ± 0.1 Ma and 13.4 ± 0.1 Ma, respectively. A hypabyssal barren intrusion adjacent northwesterly to the main pit area yields a slightly younger age of 10.2 ± 0.3 Ma (San Manuel sector, U-Pb), whereas in the Los Bronces (LB) open-pit area, the present day mineral extraction zone, porphyries range from 8.49 to 6.02 Ma (U-Pb). Hydrothermal biotite and sericite ages are up to 0.5 Ma younger but consistent with the cooling of the corresponding intrusion events of each area. Two quartz-molybdenite B-type veins from the LB open pit have Re-Os molybdenite ages of 5.65 ± 0.03 Ma and 5.35 ± 0.03 Ma consistent with published data for the contiguous Río Blanco cluster. The San Manuel exploration area within the Los Bronces cluster, located about 1.5-2 km southeast of the open-pit extraction zone, shows both the oldest hydrothermal biotite (7.70 ± 0.07 Ma; 40Ar/39Ar) and breccia cement molybdenite ages (8.36 ± 0.06 Ma; Re-Os) registered in the entire Río Blanco-Los Bronces district. These are also older than those reported from the El Teniente porphyry Cu(-Mo) deposit, suggesting that mineralization in the late Miocene to early Pliocene porphyry belt of Central Chile commenced 2 Ma before the previously accepted age of 6.3 Ma.

Deckart, K.; Silva, W.; Spröhnle, C.; Vela, I.

2014-06-01

464

MAX-DOAS measurements of pollutants and their spatial distribution over the Los Angeles Basin  

NASA Astrophysics Data System (ADS)

Despite great progress in mitigating air pollution, the Los Angeles Basin is still facing significant air quality challenges. The ability to monitor air pollution levels throughout the South Coast Air Basin in support of these efforts is important but until now has been limited to ground monitoring networks and sporadic aircraft campaigns. As this approach lacks significant spatial and/or temporal coverage, there is a pressing need for novel long-term continuous observation strategies. Here, we present the latest results from the UCLA Multiple-Axis Differential Optical Absorption Spectrometer (MAX-DOAS), located at the California Laboratory for Atmospheric Remote Sensing (CLARS) at the Mt. Wilson Observatory overlooking the Los Angeles basin. Capable of pointing in any direction, the UCLA MAX-DOAS instrument can map out the spatial distributions of pollutants and aerosol extinction over the Los Angeles air basin by measuring the column densities of trace gases from solar radiation reflected at the ground and scattered light from the sky. The MAX-DOAS technique is ideally suited to derive trace gas and aerosol vertical profiles over the entire Los Angeles basin. The MAX-DOAS has been conducting measurements of the spatial and temporal distribution of NO2, HCHO, and aerosol extinction (through O4 measurements) in the Los Angeles basin since May 2010, providing a continuous long-term dataset with a large spatial coverage. Here we show our retrieved column densities and concentrations of these trace gases, and discuss how our observations, combined with inverse modeling techniques, can improve our ability to monitor concentrations, emissions and distributions of trace gases throughout the Los Angeles Basin. We also show our latest radiative transfer calculations using the Monte-Carlo atmospheric radiative transfer model McArtim, which we have coupled with the WRF-Chem chemical transport model for improved simulation of differential slant column densities of trace gases, and estimates of aerosol extinction profiles.

Cheung, R.; Pikelnaya, O.; Stutz, J.; Fu, D.; Sander, S. P.; CHEN, D.; Li, Q.

2011-12-01

465

Ciclos políticos en Colombia: impacto fiscal en el siglo XX e impacto sobre la distribución del ingreso durante los ultimos 30 años  

Microsoft Academic Search

La orientación ideológica de los gobiernos, el momento de las elecciones y los intereses particulares de los dirigentes pueden afectar de manera importante la política económica en cualquiera de sus componentes. Se puede esperar que un gobierno establezca sus políticas en materia económica, ya sea siguiendo los preceptos ideológicos que el partido político al cual pertenece haya proclamado, o bien,

John Jairo Gómez Ríos

2008-01-01

466

Los Alamos plutonium facility applied systems integration project status report for period ending August 31, 1981  

SciTech Connect

The conceptual design of an on-line, near-real-time nondestructive assay instrumentation network for the Los Alamos Plutonium Facility is complete. Analysis of instrument history data indicates that the instrument certification procedures need improvement. Analysis of exhaust filter data has led to the derivation of a buildup prediction equation that is a function of throughput. This suggests that development of a generalized model is possible. A number of routine reports are now available from the Plutonium Facility/Los Alamos Safeguards System including inventories and active reports.

Shirk, D.G.; Bearse, R.C.; Marshall, R.S.; Baker, A.L.; Thomas, C.C. Jr.

1982-02-01

467

Operational status and future plans for Los Alamos Neutron Science Center  

SciTech Connect

The Los Alamos Neutron Science Center (LANSCE) continues to be a signature experimental science facility at Los Alamos National Laboratory (LANL). The 800 MeV linear proton accelerator provides multiplexed beams to five unique target stations to produce medical radioisotopes, ultra-cold neutrons, thermal and high energy neutrons for material and nuclear science, and to conduct proton radiography of dynamic events. Recent operating experience will be reviewed and the role of an enhanced LANSCE facility in LANL's new signature facility initiative, Matter and Radiation in Extremes (MaRIE) will be discussed.

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

2008-01-01

468

Los Alamos Air Monitoring Data Related to the Fukushima Daiichi Reactor  

SciTech Connect

In response to the disasters in Japan on March 11, 2011, Los Alamos National Laboratory (LANL) is collecting air data and analyzing the data for fission products. At present, we report preliminary data from three high-volume air samplers and one stack sampler. Iodine-131 (I-131) is not optimally measured by our standard polypropylene filters. In addition to the filter data, we have one measurement obtained from a charcoal cartridge. These data, together with measurements of other radionuclides are adequate for a preliminary assessment and assure us that radionuclides from Fukushima Daiichi do not present a threat to human health at or near Los Alamos.

McNaughton, Michael [Los Alamos National Laboratory

2011-01-01

469

Concentration Ratios for Cesium and Strontium in Produce Near Los Alamos  

SciTech Connect

The ratios of the concentrations of radionuclides in produce (fruits, vegetables, and grains) to the concentrations in the soil have been measured for cesium and strontium at locations near Los Alamos. The Soil, Foodstuffs, and Biota Team of the Meteorology and Air Quality Group of the Los Alamos National Laboratory (LANL) obtained the data at locations within a radius of 50 miles of LANL. The concentration ratios are in good agreement with previous measurements: 0.01 to 0.06 for cesium-137 and 0.1 to 0.5 for strontium-90 (wet-weight basis).

S. Salazar, M.McNaughton, P.R. Fresquez

2006-03-01

470

Measurements at Los Alamos National Laboratory Plutonium Facility in Support of Global Security Mission Space  

SciTech Connect

The Los Alamos National Laboratory Plutonium Facility at Technical Area (TA) 55 is one of a few nuclear facilities in the United States where Research & Development measurements can be performed on Safeguards Category-I (CAT-I) quantities of nuclear material. This capability allows us to incorporate measurements of CAT-IV through CAT-I materials as a component of detector characterization campaigns and training courses conducted at Los Alamos. A wider range of measurements can be supported. We will present an overview of recent measurements conducted in support of nuclear emergency response, nuclear counterterrorism, and international and domestic safeguards. This work was supported by the NNSA Office of Counterterrorism.

Stange, Sy [Los Alamos National Laboratory; Mayo, Douglas R. [Los Alamos National Laboratory; Herrera, Gary D. [Los Alamos National Laboratory; McLaughlin, Anastasia D. [Los Alamos National Laboratory; Montoya, Charles M. [Los Alamos National Laboratory; Quihuis, Becky A. [Los Alamos National Laboratory; Trujillo, Julio B. [Los Alamos National Laboratory; Van Pelt, Craig E. [Los Alamos National Laboratory; Wenz, Tracy R. [Los Alamos National Laboratory

2012-07-13

471

Nuclear criticality safety aspects of emergency response at the Los Alamos National Laboratory.  

SciTech Connect

Emergency response at Los Alamos National Laboratory (LANL) is handled through a graded approach depending on the specific emergency situation . LANL maintains a comprehensive capability to respond to events ranging from minor facility events (alerts) through major community events (general emergencies), including criticality accidents . Criticality safety and emergency response apply to all activities involving significant quantities of fissile material at LANL, primarily at Technical Area 18 (TA-18, the Los Alamos Critical Experiments Facility) and Technical Area 55 (TA-55, the Plutonium Facility). This discussion focuses on response to a criticality accident at TA-55; the approach at TA-18 is comparable .

Baker, J. S. (James S.)

2003-01-01

472

The "LARSE" Project - Working Toward a Safer Future for Los Angeles  

USGS Publications Warehouse

The Los Angeles region is underlain by a network of active faults, including many that are deep and do not break the Earth's surface. These hidden faults include the previously unknown one responsible for the devastating January 1994 Northridge earthquake, the costliest quake in U.S. history. So that structures can be built or strengthened to withstand the quakes that are certain in the future, the Los Angeles Region Seismic Experiment (LARSE) is locating hidden earthquake hazards beneath the region to help scientists determine where the strongest shaking will occur.

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

1999-01-01

473

Total electron content (TEC) variability at Los Alamos, New Mexico: A comparative study: FORTE-derived TEC analysis  

Microsoft Academic Search

Data collected from Fast On-Orbit Recording of Transient Events (FORTE) satellite-received Los Alamos Portable Pulser (LAPP) signals during 1997-2002 are used to derive the total electron content (TEC) at Los Alamos, New Mexico. The LAPP-derived TECs at Los Alamos are analyzed for diurnal, seasonal, interannual, and 27-day solar cycle variations. Several aspects in deriving TEC are analyzed, including slant to

Zhen Huang; Robert Roussel-Dupré

2005-01-01

474

Total electron content (TEC) variability at Los Alamos, New Mexico: A comparative study: FORTE-derived TEC analysis  

Microsoft Academic Search

Data collected from Fast On-Orbit Recording of Transient Events (FORTE) satellite–received Los Alamos Portable Pulser (LAPP) signals during 1997–2002 are used to derive the total electron content (TEC) at Los Alamos, New Mexico. The LAPP-derived TECs at Los Alamos are analyzed for diurnal, seasonal, interannual, and 27-day solar cycle variations. Several aspects in deriving TEC are analyzed, including slant to

Zhen Huang; Robert Roussel-Dupré

2005-01-01

475

Trazodona: ¿Nuevo enfoque selectivo para el tratamiento de los sofocos generados por la deprivación androgénica en el carcinoma prostático?  

Microsoft Academic Search

toxicidad nada despreciable. Dentro del tratamiento no hormonal de esta patología juegan un papel destacado los antidepresivos. Latrazodona,unantidepresivoSARI(inhibidoresdelarecaptacióndeserotonina\\/antagonistadela2A),conunperfildeactua - ciónmásselectivosobrelosreceptoresimplicadosenlossofocos;podríaserdegraninterés.Trazodonamuestraunagranafinidad por los receptores 5-HT 2A y una moderada afinidad por los receptores 5-HT 1A. Comoesconocidolosnivelesdeserotonina(5-hidroxitriptaminao5-HT)enmujerespostmenopáusicasestándisminuidos,nor - malizándoseconlasterapiassustitutivas.Todoellosugierequeladeprivaciónabruptadehormonassexualesdalugaraunareduc - ción en la circulación de serotonina, con el consiguiente aumento de sus receptores 5-HT 2A hipotalámicos. Estos receptores esta - rían implicados

Santiago Vilar González; Francesc Montañá Puig; Sebastiá Sabater Martí; Manuel Aguayo Martos

2009-01-01

476

Se calcula que los costos del cáncer ascenderán por lo menos a $158.000 millones en 2020  

Cancer.gov

Con base en el crecimiento y en el avance de edad de la población de EE. UU., se proyecta que los gastos médicos por cáncer en el año 2020 ascenderán por lo menos a $158.000 millones (en dólares de 2010); lo que significa un aumento de 27% sobre 2010. Si los instrumentos creados últimamente para diagnosticar, tratar y seguir observando el cáncer continúan subiendo de precio, los gastos médicos por cáncer podrían ascender hasta $207.000 millones. Las proyecciones están basadas en los datos más recientes disponibles acerca de la incidencia del cáncer, de supervivencia y de costos de atención médica.

477

Using TLDs to monitor Los Alamos drillbacks at the Nevada test site  

SciTech Connect

Los Alamos National Laboratory uses LiF TLDs to measure the quantity of radiation in the environment during drilling, sampling and hole cementing operations following underground nuclear testing. The procedures for preparing the TLDs, placing the TLDs in the field and their subsequent analysis and dose evaluation are presented. 5 references, 4 figures, 1 table.

Cucchiara, A.L.; Martin, A.

1985-01-01

478

Status of the Los Alamos free atomic tritium beta-decay experiment  

SciTech Connect

An experiment to study the beta-decay of tritium using a gaseous source of free (unbound) atomic tritium is currently underway in the Physics Division at Los Alamos. The use of free atomic tritium along with careful design of the measurement scheme should allow a definitive determination for an electron antineutrino mass approx. 10 eV.

Wilkerson, J.F.; Bowles, T.J.; Browne, J.C.; Burritt, T.H.; Cohen, J.S.; Helffrich, J.A.; Knapp, D.A.; Maley, M.P.; Martin, R.L.; Robertson, R.G.H.

1984-01-01

479

COMMUNITY EDUCATION AND MENTAL HEALTH IN THE SOUTH LOS ANGELES COMMUNITY.  

ERIC Educational Resources Information Center

THERE IS AN INTERRELATIONSHIP BETWEEN THE SOCIAL PROBLEMS EXPERIENCED BY MINORITY GROUPS IN LOS ANGELES AND MENTAL ILLNESS. THE CAUSES OF THESE PROBLEMS CAN BE FOUND IN THE ENVIRONMENTAL, SOCIAL, AND ECONOMIC SITUATIONS THAT ARE PECULIAR TO THE AFFECTED GROUPS. THOUGH THE SCHOOL HAS A ROLE TO PLAY, IT CANNOT TAKE FULL RESPONSIBILITY FOR SOLVING…

TERRELL, JO E.

480

Los Rios Community College District Student Profile, Spring, 1988. Based upon First Census Data.  

ERIC Educational Resources Information Center

Based upon results from an official census undertaken during the fourth week of the spring 1998 term, this report provides data on student demographics and enrollment trends from spring 1994 through spring 1998 at the three colleges of California's Los Rios Community College District: American River College, Cosumnes River College, and Sacramento…

Glyer-Culver, Betty

481

A Leaflet of Rhus toxicodendroides, a Fossil Plant from the Los Ahuehuetes Locality, Puebla, Mexico  

NSDL National Science Digital Library

A leaflet of Rhus toxicodendroides, a fossil plant from the Los Ahuehuetes locality, Puebla, Mexico, a center of diversity for the Anacardiaceae since the Oligocene, suggesting that the area was important for the radiation and diversification for some lineages within the family.

Hector Hernández Campos

2004-03-09

482

Calculation of Moments from Measurements by the Los Alamos Magnetospheric Plasma Analyzer  

SciTech Connect

The various steps involved in computing the moments (density, velocity, and temperature) of the ion and electron distributions measured with the Los Alamos Magnetospheric Plasma Analyzer (MPA) are described. The assumptions, constants, and algorithms contained in the FORTRAN code are presented, as well as the output parameters produced by the code.

M. F. Thomsen; E. Noveroske; J. E. Borovsky; D. J. McComas

1999-05-01

483

Patterns of press coverage of mayoral campaigns: Comparing Detroit and Los Angeles  

Microsoft Academic Search

This study examines newspaper coverage of mayoral elections in Detroit and Los Angeles in 1997 and 2001. The project had three objectives: (1) to see how journalistic tendencies in the coverage of national elections, most notably, a preoccupation with the “horse race” and incumbency, are evident in coverage of local campaigns; (2) to see how patterns of press coverage vary

Julio Borquez; Donna Wasserman

2006-01-01

484

Some nuclear safety aspects of the Los Alamos accelerator based conversion concept  

NASA Astrophysics Data System (ADS)

The detailed analysis of the few parameters important for the safety of the accelerator-driven plutonium burner concept developed at Los Alamos National Laboratory was performed. The plutonium load, optimal thermalization of the neutron spectrum and temperature reactivity coefficients were investigated. The calculations revealed the strong positive temperature reactivity coefficient. The ways to solve this problem are suggested.

Gudowski, Waclaw; Möller, Erik; Venneri, Francesco

1995-09-01

485

The Los Angeles Civil Unrest: Implications for Future Mental Health Counseling Interventions.  

ERIC Educational Resources Information Center

Outlines the sequence of events in the Los Angeles civil unrest (riots) and summarizes several of the underlying causes that precipitated the event. Describes the psychological reactions of victims and emergency responders. Discusses crisis interventions used to minimize the emotional aftereffects. Discusses what mental health professionals and…

Bowenkamp, Christine

1995-01-01

486

Los Angeles County after the 1992 Civil Disturbances: Degree of Exposure and Impact on Mental Health.  

ERIC Educational Resources Information Center

Assesses the impact of the 1992 Los Angeles (L.A.) civil disturbances on psychosocial functioning. The impact was worst in the south central communities of L.A. Higher levels of posttraumatic stress disorder (PTSD) were found among respondents who reported disturbance-related experiences. Exposure to an acute event was predictive of current PTSD…

Hanson, Rochelle F.; And Others

1995-01-01

487

Characteristics of atmospheric organic and elemental carbon particle concentrations in Los Angeles  

Microsoft Academic Search

A fine particle air monitoring network was operated in the Los Angeles area during 1982. It was found that carbonaceous aerosols accounted for typically 40% of total fine particle mass loadings at most monitoring sites. The ratio of total carbon (TC) to elemental carbon (EC) in ambient samples and in primary source emissions was examined as an indicator of the

H. Andrew. Gray; Glen R. Cass; James J. Huntzicker; Emily K. Heyerdahl; John A. Rau

1986-01-01

488

El contraste de medias recortadas ante la violación de los supuestos paramétricos  

Microsoft Academic Search

La simulación ha mostrado ser un instrumento eficaz para con - trastar la bondad de estadísticos de uso frecuente en la in vestiga- ción psicológica, comprobándose cómo se comportan frente a la violación de los supuestos sub yacentes. En inve s t i gaciones anteri o res (Borges, San Luis y Sánch e z - B ru- no, 1993; Borges,

A. Sánchez Bruno; A. Borges del Rosal; I. Cañadas Osinski

2000-01-01

489

Capabilities for high explosive pulsed power research at Los Alamos National Laboratory  

Microsoft Academic Search

Research on topics requiring high magnetic fields and high currents have been pursued using high explosive pulsed power (HEPP) techniques since the 1950s at Los Alamos National Laboratory. We have developed many sophisticated HEPr systems through the years, and most of them depend on technology available from the nuclear weapons program. Through the 1980s and 1990s, our budgets would sustain

James H Goforth; Henn Oona; Douglas G Tasker; A M Kaul

2008-01-01

490

Remedial/Developmental Education and the Cost of Community College Transfer: A Los Angeles County Sample  

ERIC Educational Resources Information Center

This study calculates and explores the total costs of a community college education prior to transfer to a four-year college. Included are all courses both at and below the college level by 411 students who attended one of the nine community colleges in the Los Angeles Community College District (LACCD) and who successfully transferred to a…

Melguizo, Tatiana; Hagedorn, Linda Serra; Cypers, Scott

2008-01-01

491

ESTUDIO DE LA RESISTENCIA MECÁNICA Y LA TEXTURA DE LOS CAPARAZONES MINERALIZADOS DE BIVALVOS  

Microsoft Academic Search

RESUMEN Los caparazones de moluscos marinos se encuentran principalmente constituidos por variantes cristalinas del CO3Ca, aragonita o calcita, embebidas en un polímero biológico formando un bio-compuesto. La mineralización procede de una manera orientada y las texturas resultantes pueden ser medidas por técnicas usuales de difracción. Las mismas pueden incluso ser utilizadas como distintivas de un género o una especie. Esa

R. E. Bolmaro; P. Romano Trigueros; S. Zaefferer

492

Desegregating the Los Angeles Unified School District: First Simulation Series. Volume I.  

ERIC Educational Resources Information Center

The results of computer simulations of each of 17 variations on 4 prototypical desegregation plans applied to the Los Angeles Unified School District (LAUSD) are reported in this document. The prototypes, each representing a category of proposals offered at one point or another during the litigation of the desegregation issues are: (1) an…

Hamilton, Rabinovitz and Szanton, Inc., Los Angeles, CA.

493

Desegregating the Los Angeles Unified School District: Second Simulation Series. Volume I.  

ERIC Educational Resources Information Center

This document reports the results of computer simulations of each of 19 variations on 4 prototypical desegregation plans applied to the Los Angeles Unified School District (LAUSD). Each prototype represents one of the following categories of proposals offered during the litigation of the desegregation issue in the California courts: (1) an…

Hamilton, Rabinovitz and Szanton, Inc., Los Angeles, CA.

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