WorldWideScience
1

COMMANDE NON LINEAIRE SANS CAPTEUR DE LA MACHINE SYNCHRONE A AIMANTS PERMANENTS  

OpenAIRE

La machine synchrone à aimants permanents, comparée aux autres machines électriques, est très présente dans les applications industrielles de type contrôle de mouvement, et ceci en raison de sa compacité, sa faible inertie, son rendement, sa robustesse, sa puissance massique élevée et sa simplicité de commande avec capteur mécanique. Cependant, la commande sans capteur de cette machine est toujours un problème difficile à cause des problèmes de perte d'observabilité. Le but de ...

Ezzat, Marwa

2011-01-01

2

Relations de dispersion pour cha\\^ines lin\\'eaires comportant des interactions harmoniques auto-similaires  

CERN Document Server

Many systems in nature have arborescent and bifurcated structures such as trees, fern, snails, lungs, the blood vessel system, etc. and look self-similar over a wide range of scales. Which are the mechanical and dynamic properties that evolution has optimized by choosing self-similarity? How can we describe the mechanics of self-similar structures in the static and dynamic framework? Physical systems with self-similarity as a symmetry property require the introduction of non-local particle-particle interactions and a (quasi-) continuous distribution of mass. We construct self-similar functions and linear operators such as a self-similar variant of the Laplacian and of the D'Alembertian wave operator. The obtained self-similar linear wave equation describes the dynamics of a quasi-continuous linear chain of infinite length with a spatially self-similar distribution of nonlocal inter-particle springs. The self-similarity of the nonlocal harmonic particle-particle interactions results in a dispersion relation of...

Michelitsch, Thomas M; Nicolleau, Franck C G A; Nowakowski, Andrzej F; Derogar, Shahram

2009-01-01

3

Cultural Factors Related to Smoking in San Francisco's Irish Bars  

Science.gov (United States)

California's Smoke-Free Workplace Act was extended to include bars in 1998. While the majority of bars in the state have become smoke free, in many bars patrons and staff continue to smoke despite the law. The authors present findings from a study which assessed cultural factors related to continued smoking in bars in the city of San Francisco. In…

Satterlund, Travis D.; Antin, Tamar M. J.; Lee, Juliet P.; Moore, Roland S.

2009-01-01

4

RELATIONS, GENDER AND SEXUALITY AMONG RURAL YOUTH OF SALINAS DE HIDALGO, SAN LUIS POTOSÍ, MÉXICO  

OpenAIRE

The objectives of this research were to reflect on the influence of traditional socio-cultural beliefs about sexuality and reproduction of rural youth in Salinas de Hidalgo, San Luis Potosí, and present the perceptions and practices of gender relations regarding sexuality and reproduction among rural adolescents Salinas de Hidalgo, San Luis Potosí. The theoretical foundation is based on the Gender Perspective and Feminism. Qualitative methodology in-depth interviews and participatory observ...

Ma. Tania Hernández-Guerrero; Pilar Alberti-Manzanares; Elia Pérez-Nasser; Ma. Antonia Pérez-Olvera; Alejandra Olivera-Méndez; Daniel Talavera-Magaña

2014-01-01

5

Constancy of the relation between floc size and density in San Francisco Bay  

Science.gov (United States)

The size and density of fine-sediment aggregates, or flocs, govern their transport and depositional properties. While the mass and volume concentrations of flocs can be measured directly or by optical methods, they must be determined simultaneously to gain an accurate density measurement. Results are presented from a tidal cycle study in San Francisco Bay, where mass concentration was determined directly, and volume concentration was measured in 32 logarithmically spaced size bins by laser-diffraction methods. The relation between floc size and density is investigated assuming a constant primary particle size and fractal floc dimension. This relation is validated with measurements from several sites throughout San Francisco Bay. The constancy of this relation implies a uniform primary particle size throughout the Bay, as well as uniform aggregation/disaggregation mechanisms (which modify fractal dimension). The exception to the relation is identified during near-bed measurements, when advected flocs mix with recently resuspended flocs from the bed, which typically have a higher fractal dimension than suspended flocs. The constant relation for suspended flocs simplifies monitoring and numerical modeling of suspended sediment in San Francisco Bay. ?? 2007 Elsevier B.V. All rights reserved.

Ganju, N.K.; Schoellhamer, D.H.; Murrell, M.C.; Gartner, J.W.; Wright, S.A.

2007-01-01

6

CULTURAL FACTORS RELATED TO SMOKING IN SAN FRANCISCO’S IRISH BARS  

OpenAIRE

California’s Smoke-Free Workplace Act was extended to include bars in 1998. While the majority of bars in the state have become smoke free, in many bars patrons and staff continue to smoke despite the law. The authors present findings from a study which assessed cultural factors related to continued smoking in bars in the city of San Francisco. In bars serving primarily Irish migrants, tight-knit relations within the local Irish bar community together with a reluctance to be the first Irish...

Satterlund, Travis D.; Antin, Tamar M. J.; Lee, Juliet P.; Moore, Roland S.

2009-01-01

7

Traffic-related air pollution in the community of San Ysidro, CA, in relation to northbound vehicle wait times at the US-Mexico border Port of Entry  

Science.gov (United States)

The San Diego/Tijuana US-Mexico border crossing at the San Ysidro Port of Entry (POE) is the world's busiest international land border crossing (GSA, 2013). San Ysidro, California, is the US community immediately adjacent to the border crossing. More than 90% of San Ysidro residents are Hispanic, and the average household income is less than 60% of the San Diego regional average. This study investigated the San Ysidro POE as a source of traffic-related air pollutants in San Ysidro, especially in relation to wind direction and northbound vehicle wait times. The pollutants ultrafine particulate matter (UFP), black carbon (BC), and particulate matter <2.5 ?m in diameter (PM2.5) were periodically sampled through the course of 2010 at four rooftop locations: one commercial establishment near the POE, two elementary schools in San Ysidro, and a coastal estuary reference site. Weather data from two nearby sites and northbound border wait times were also collected. Results indicate consistently higher daytime BC and UFP concentrations at the measurement sites near the POE. Pollution concentrations were higher during low wind speeds or when wind was blowing from the POE towards San Ysidro. In February, March and November measurements, black carbon pollution appeared to be significantly positively associated with the POE northbound wait times when the wind direction was blowing from the POE towards San Ysidro or during low wind speeds, but not when the wind direction was from the west/northwest towards the POE. This pilot study is the first to investigate the potential effect of the POE, especially the long northbound traffic delays, on the nearby community of San Ysidro. Disparities in traffic exposures are an environmental justice issue and this should be taken into account during planning and operation of POEs.

Quintana, Penelope J. E.; Dumbauld, Jill J.; Garnica, Lynelle; Chowdhury, M. Zohir; Velascosoltero, José; Mota-Raigoza, Arturo; Flores, David; Rodríguez, Edgar; Panagon, Nicolas; Gamble, Jamison; Irby, Travis; Tran, Cuong; Elder, John; Galaviz, Vanessa E.; Hoffman, Lisa; Zavala, Miguel; Molina, Luisa T.

2014-05-01

8

The risk of low doses of ionising radiation and the linear no threshold relationship debate; La controverse sur les effets des faibles doses de rayonnements ionisants et la relation lineaire sans seuil  

Energy Technology Data Exchange (ETDEWEB)

The ICRP and the B.E.I.R. VII reports recommend a linear no threshold (L.N.T.) relationship for the estimation of cancer excess risk induced by ionising radiations (IR), but the 2005 report of Medicine and Science French Academies concludes that it leads to overestimate of risk for low and very low doses. The bases of L.N.T. are challenged by recent biological and animal experimental studies which show that the defence against IR involves the cell microenvironment and the immunologic system. The defence mechanisms against low doses are different and comparatively more effective than for high doses. Cell death is predominant against low doses. DNA repairing is activated against high doses, in order to preserve tissue functions. These mechanisms provide for multicellular organisms an effective and low cost defence system. The differences between low and high doses defence mechanisms are obvious for alpha emitters which show several greys threshold effects. These differences result in an impairment of epidemiological studies which, for statistical power purpose, amalgamate high and low doses exposure data, since it would imply that cancer IR induction and defence mechanisms are similar in both cases. Low IR dose risk estimates should rely on specific epidemiological studies restricted to low dose exposures and taking precisely into account potential confounding factors. The preliminary synthesis of cohort studies for which low dose data (< 100 mSv) were available show no significant risk excess, neither for solid cancer nor for leukemias. (authors)

Tubiana, M. [Centre Antoine Beclere, Faculte de Medecine, 75 - Paris (France); Masse, R. [11 rue du Haras, Residence Le Boqueteau, Acacias 2, 91 - Saint-Michel-sur-Orge (France); Vathaire, F. de [Institut Gustave Roussy, INSERM U 605., 94 - Villejuif (France); Averbeck, D. [Institut Curie, Section de Recherche, Lab. Raymond Latarjet, UMR2027 du CNRS, Centre Universitaire d' Orsay, 91 - Orsay (France); Aurengo, A. [Hopital Pitie-Salpetriere, Service Medecine Nucleaire, 75 - Paris (France)

2007-04-15

9

MESOZOIC MAGMATISM IN EAST URUGUAY: PETROLOGICAL CONSTRAINTS RELATED TO THE SIERRA SAN MIGUEL REGION  

Directory of Open Access Journals (Sweden)

Full Text Available This work presents new results of a detailed geological and structural investigation focusing the easternmost Uruguayan Mesozoic magmatic occurrences related to the south Atlantic opening. Lithological descriptions, their stratigraphic relationships and complimentary lithochemical characterizations carried out in the San Miguel region (East Uruguay are presented. Three volcanic/sub-volcanic units have been recognized. The felsic volcanic association is composed by rhyolitic - dacitic flows, mainly with porphyritic textures and sub-alkalinenature and related pyroclastic rocks. The felsic sub-volcanic association is characterized by granophyres of about 25 km2 of exposed area, cross- cut by mafic and felsic dykes. Finally, a mafic association has been identified characterized by dykes and a small intrusion of gabbroic composition.All these units are Mesozoic in age (130 - 127 Ma and according to their chemical nature they correspond tosub-alkaline to weak peralkaline magmas.

Conti Bruno

2009-07-01

10

MESOZOIC MAGMATISM IN EAST URUGUAY: PETROLOGICAL CONSTRAINTS RELATED TO THE SIERRA SAN MIGUEL REGION  

Scientific Electronic Library Online (English)

Full Text Available SciELO Colombia | Language: English Abstract in spanish Este trabajo presenta nuevos resultados geológico-estructurales y geoquímicos relacionados con el magmatismo Mesozoico del extremo Este de Uruguay (Sierra de San Miguel, Departamento de Rocha), asociados a la apertura del océano Atlántico Sur. Fueron reconocidas para la región estudiada tres unidade [...] s volcánicas/subvolcánicas. La asociación volcánica félsica está compuesta por derrames riolíticos - dacíticos, con texturas dominantemente porfiríticas y naturaleza química subalcalina. Asociadas a estas riolitas ocurren niveles de rocas piroclásticas. La asociación subvolcánica félsica está compuesta por granófiros con una extensión superficial de aproximadamente 25 km2, cortados por diques máficos y félsicos. Fue identificada también una asociación básica compuesta por diques y un cuerpo de gabro. Todas estas unidades son de edad Mesozoico (130 - 127 Ma) y de acuerdo a su carácter químico corresponden a magmas de naturaleza subalcalina a débilmente peralcalina. Abstract in english This work presents new results of a detailed geological and structural investigation focusing the easternmost Uruguayan Mesozoic magmatic occurrences related to the south Atlantic opening. Lithological descriptions, their stratigraphic relationships and complimentary lithochemical characterizations [...] carried out in the San Miguel region (East Uruguay) are presented. Three volcanic/sub-volcanic units have been recognized. The fel-sic volcanic association is composed by rhyolitic - dacitic flows, mainly with porphyritic textures and sub-alkaline nature and related pyroclastic rocks. The felsic sub-volcanic association is characterized by granophyres of about 25 km2 of exposed area, cross- cut by mafic and felsic dykes. Finally, a mafic association has been identified characterized by dykes and a small intrusion of gabbroic composition. All these units are Mesozoic in age (130- 127 Ma) and according to their chemical nature they correspond to sub-alkaline to weak peralkaline magmas.

Rossana, Muzio; Elena, Peel; Ethel, Morales; Gerardo, Veroslavsky; Bruno, Conti.

2009-06-01

11

Data related uncertainty in near-surface vulnerability assessments for agrochemicals in the San Joaquin Valley.  

Science.gov (United States)

Precious groundwater resources across the United States have been contaminated due to decades-long nonpoint-source applications of agricultural chemicals. Assessing the impact of past, ongoing, and future chemical applications for large-scale agriculture operations is timely for designing best-management practices to prevent subsurface pollution. Presented here are the results from a series of regional-scale vulnerability assessments for the San Joaquin Valley (SJV). Two relatively simple indices, the retardation and attenuation factors, are used to estimate near-surface vulnerabilities based on the chemical properties of 32 pesticides and the variability of both soil characteristics and recharge rates across the SJV. The uncertainties inherit to these assessments, derived from the uncertainties within the chemical and soil data bases, are estimated using first-order analyses. The results are used to screen and rank the chemicals based on mobility and leaching potential, without and with consideration of data-related uncertainties. Chemicals of historic high visibility in the SJV (e.g., atrazine, DBCP [dibromochloropropane], ethylene dibromide, and simazine) are ranked in the top half of those considered. Vulnerability maps generated for atrazine and DBCP, featured for their legacy status in the study area, clearly illustrate variations within and across the assessments. For example, the leaching potential is greater for DBCP than for atrazine, the leaching potential for DBCP is greater for the spatially variable recharge values than for the average recharge rate, and the leaching potentials for both DBCP and atrazine are greater for the annual recharge estimates than for the monthly recharge estimates. The data-related uncertainties identified in this study can be significant, targeting opportunities for improving future vulnerability assessments. PMID:23099933

Loague, Keith; Blanke, James S; Mills, Melissa B; Diaz-Diaz, Ricardo; Corwin, Dennis L

2012-01-01

12

Mesure et retroaction sur un qubit multi-niveaux en electrodynamique quantique en circuit non lineair  

Science.gov (United States)

L'electrodynamique quantique en circuit est une architecture prometteuse pour le calcul quantique ainsi que pour etudier l'optique quantique. Dans cette architecture, on couple un ou plusieurs qubits supraconducteurs jouant le role d'atomes a un ou plusieurs resonateurs jouant le role de cavites optiques. Dans cette these, j'etudie l'interaction entre un seul qubit supraconducteur et un seul resonateur, en permettant cependant au qubit d'avoir plus de deux niveaux et au resonateur d'avoir une non-linearite Kerr. Je m'interesse particulierement a la lecture de l'etat du qubit et a son amelioration, a la retroaction du processus de mesure sur le qubit de meme qu'a l'etude des proprietes quantiques du resonateur a l'aide du qubit. J'utilise pour ce faire un modele analytique reduit que je developpe a partir de la description complete du systeme en utilisant principalement des transfprmations unitaires et une elimination adiabatique. J'utilise aussi une librairie de calcul numerique maison permettant de simuler efficacement l'evolution du systeme complet. Je compare les predictions du modele analytique reduit et les resultats de simulations numeriques a des resultats experimentaux obtenus par l'equipe de quantronique du CEASaclay. Ces resultats sont ceux d'une spectroscopie d'un qubit supraconducteur couple a un resonateur non lineaire excite. Dans un regime de faible puissance de spectroscopie le modele reduit predit correctement la position et la largeur de la raie. La position de la raie subit les decalages de Lamb et de Stark, et sa largeur est dominee par un dephasage induit par le processus de mesure. Je montre que, pour les parametres typiques de l'electrodynamique quantique en circuit, un accord quantitatif requiert un modele en reponse non lineaire du champ intra-resonateur, tel que celui developpe. Dans un regime de forte puissance de spectroscopie, des bandes laterales apparaissent et sont causees par les fluctuations quantiques du champ electromagnetique intra-resonateur autour de sa valeur d'equilibre. Ces fluctuations sont causees par la compression du champ electromagnetique due a la non-linearite du resonateur, et l'observation de leur effet via la spectroscopie d'un qubit constitue une premiere. Suite aux succes quantitatifs du modele reduit, je montre que deux regimes de parametres ameliorent marginalement la mesure dispersive d'un qubit avec un resonateur lineaire, et significativement une mesure par bifurcation avec un resonateur non lineaire. J'explique le fonctionnement d'une mesure de qubit dans un resonateur lineaire developpee par une equipe experimentale de l'Universite de Yale. Cette mesure, qui utilise les non-linearites induites par le qubit, a une haute fidelite, mais utilise une tres haute puissance et est destructrice. Dans tous ces cas, la structure multi-niveaux du qubit s'avere cruciale pour la mesure. En suggerant des facons d'ameliorer la mesure de qubits supraconducteurs, et en decrivant quantitativement la physique d'un systeme a plusieurs niveaux couple a un resonateur non lineaire excite, les resultats presentes dans cette these sont pertinents autant pour l'utilisation de l'architecture d'electrodynamique quantique en circuit pour l'informatique quantique que pour l'optique quantique. Mots-cles: electrodynamique quantique en circuit, informatique quantique, mesure, qubit supraconducteur, transmon, non-linearite Kerr

Boissonneault, Maxime

13

Fronteras 1976. San Diego/Tijuana--The International Border in Community Relations: Gateway or Barrier?  

Science.gov (United States)

Nine papers comprise the proceedings from the conference on cultural interdependence between the border regions of San Diego, California, and Tijuana, Mexico. The papers discuss the following: (1) insurgence of the Southwest's Spanish-speaking minority since 1960; (2) opportunities for cooperation between the United States and Mexican governments;…

Skagen, Kiki, Ed.

14

Programmation Lin\\'eaire, une nouvelle approche / Novel way in linear Programming  

OpenAIRE

R\\'esum\\'e Apr\\`es un bref aper\\c{c}u permettant de situer notre travail, nous proposons une nouvelle voie pour aborder la programmation lin\\'eaire en proposant un algorithme \\'elabor\\'e \\`a partir d'une id\\'ee simple qui permet d'obtenir une solution aussi approch\\'ee que voulu par translation dichotomique d'un hyperplan de l'espace des solutions. Abstract After a short course in order to situate our work, we propose a new way to study linear programming and we give a pro...

Faye, I.; Lavalle?e, I.; Ngom, M.; Seck, D.; Sy, A.

2010-01-01

15

The Migration Experience as It Relates to Cargo Participation in San Miguel Cuevas, Oaxaca  

Directory of Open Access Journals (Sweden)

Full Text Available Este artículo ofrece un recuento de los continuos efectos de la migración sobre el gobierno municipal y la organización de una comunidad mixteca: San Miguel Cuevas, Oaxaca, México. Legalmente constituida como un autogobierno municipal indígena, en décadas recientes, Cuevas ha sido reconstituida como una comunidad transnacional, cuyos ciudadanos radican principalmente en ella y en Fresno, California. La creciente circularidad y permanente migración de Cuevas a Estados Unidos desde finales de los ochenta, así como los usos y costumbres impuestos por la vida comunitaria en Cuevas, pone a sus varones migrantes en una situación complicada para cumplir sus obligaciones familiares y comunitarias -cívicas y ceremoniales (cargos-, que se requieren para mantener su ciudadanía y residencia en Cuevas y tener acceso a tierras comunales y otros recursos.

Silvia Ventura Luna

2010-01-01

16

Environmental assessment related to the operation of San Miguel uranium project, WM-20, Phoneer Uravan, Inc  

International Nuclear Information System (INIS)

An environmental assessment was prepared by the staff of the U.S. Nuclear Regulatory Commission, Office of Nuclear Material Safety and Safeguards, in response to a request for technical assistance from the State of Colorado in connection with licensing action on the proposed Pioneer Uravan, Inc., San Miguel uranium project. The major components of discussion are (1) a summary and recommended licensing conditions, (2) a description of the site environment and the proposed facility operation as well as alternatives in comparison with NRC's performance objectives for tailings management, and (3) a radiological assessment for estimating the facility's compliance with 10 CFR 20 and 40 CFR 190 dose regulations. The NRC recommends licensing the proposed mill subject to stipulated license conditions

17

Safety evaluation report related to the full-term operating license for San Onofre Nuclear Generating Station, Unit 1 (Docket No. 50-206)  

International Nuclear Information System (INIS)

The safety evaluation report for the full-term operating license application filed by the Southern California Edison Company and the San Diego Gas and Electric Company has been prepared by the Office of Nuclear Reactor Regulation of the US Nuclear Regulatory Commission. The facility is located in San Diego County, California. The staff has evaluated the issues related to the conversion of the provisional operating license to a full-term operating license and concluded that the facility can continue to be operated without endangering the health and safety of the public following the license conversion. 43 refs., 3 figs., 3 tabs

18

Recent development on Malaysian Small Angle Neutron Scattering (MySANS) facility upgrading and related research activities  

International Nuclear Information System (INIS)

This paper describes the recent progress of the MySANS - 'mini' SANS facility and its present applications in materials science and technology research and education. Both management and technical strategies are generally explained. The formation of Reactor Interest Group (RIG) has lead to several experimental projects which collaborative work between MINT and local universities/research institutes. In addition a future work plan is also noted. (author)

19

Gay identity-related factors and sexual risk among men who have sex with men in San Francisco.  

Science.gov (United States)

This study explored the relationship between gay identity-related factors (gay community involvement, gay bar attendance, gay identity importance, and self-homophobia) and unprotected anal sex (UA) in the past 3 months among men who have sex with men (MSM) of three different race/ethnicity groups. Four hundred eighty-three MSM (mean age 34) were recruited in the San Francisco Bay Area (33% African American, 34% Latino and 33% White). Compared with White MSM, African American and Latino MSM were less likely to identify as gay, and to attend gay bars/clubs, and more likely to report self-homophobia. Just over one third of the sample reported UA (did not vary by race). Gay community involvement was associated with receptive UA with all partners (adjusted odds ratio [AOR = 1.30, 95% Confidence Interval (CI) = 1.06-1.60). Gay bar attendance was associated with insertive UA with all partners (AOR = 1.20, 95% CI = 1.01-1.43) and with HIV-discordant partners (AOR = 1.35, 95% CI = 1.08-1.69). Implications for prevention include addressing community norms and encouraging alternatives to bars as settings in which to meet and socialize with other MSM. PMID:19397432

Flores, Stephen A; Mansergh, Gordon; Marks, Gary; Guzman, Robert; Colfax, Grant

2009-04-01

20

Seropositivity for HIV and the development of AIDS or AIDS related condition: three year follow up of the San Francisco General Hospital cohort  

OpenAIRE

The three year actuarial progression rate to the acquired immune deficiency syndrome (AIDS) in a cohort of men in San Francisco who were seropositive for the human immuno-deficiency virus (HIV) was 22%. An additional 26 (19%) developed AIDS related conditions. ?2 Microglobulin concentration, packed cell volume, HIV p24 antigenaemia, and the proportion and number of T4 lymphocytes each independently predicted progression to AIDS. ?2 Microglobulin was the most powerful predictor. The 111 subj...

Moss, Andrew R.; Bacchetti, Peter; Osmond, Dennis; Krampf, Walter; Chaisson, Richard E.; Stites, Daniel; Wilber, Judith; Allain, Jean-pierre; Carlson, James

1988-01-01

21

30 August 2011 - Médecins sans frontières International President U. K Karunakara signing the guest book with Head of International Relations F. Pauss and Adviser for Life Sciences M. Dosanjh; visiting CMS underground experimental area with Collaboration Spokesperson G. Tonelli.  

CERN Multimedia

30 August 2011 - Médecins sans frontières International President U. K Karunakara signing the guest book with Head of International Relations F. Pauss and Adviser for Life Sciences M. Dosanjh; visiting CMS underground experimental area with Collaboration Spokesperson G. Tonelli.

Maximilien Brice

2011-01-01

22

Determination of the 20 MeV linear accelerator, new injector for the synchrotron Saturne. Choice of the electrical and dynamical particle parameters; Determination de l'accelerateur lineaire de 20 MeV, nouvel injecteur du synchrotron Saturne. Choix des parametres electriques, dynamique des particules  

Energy Technology Data Exchange (ETDEWEB)

This report takes place in the general determination of the 20 MeV linear accelerator which will be the new Saturne injector; it deals with particle dynamics. Starting from beam requirements at the output of the linac, cells lengths with variable synchronous phase angle, buncher and de-buncher parameters, beam emittances at the output in several phase spaces are successively determined. (author) [French] Dans le contexte general de la determination de l'accelerateur lineaire de 20 MeV, nouvel injecteur du synchrotron Saturne, ce rapport traite de la partie relative au mecanisme de l'acceleration des particules; a partir des caracteristiques souhaitees pour le faisceau a la sortie de cet accelerateur, on determine successivement les longueurs des cellules, compte tenu du choix d'un angle de phase synchrone variable, les caracteristiques du groupeur et du degroupeur et les emittances du faisceau en sortie dans les differents plans de phase. (auteur)

Prome, M. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

1968-12-15

23

SAN PEDRO GEODATA BROWSER  

Science.gov (United States)

The San Pedro Data Browser was developed by the Landscape Ecology Branch of the U.S. Environmental Protection Agency (Las Vegas, NV). The goal of the Landscape Sciences Program is to improve decision-making relative to natural and human resource management through the development...

24

Empirical relations to estimate underwater PAR attenuation in San Quintín Bay using Secchi depth and horizontal sighting range  

Directory of Open Access Journals (Sweden)

Full Text Available Empirical relationships to estimate vertical attenuation coefficient of photosynthetically available radiation (KPAR using Secchi disk, vertical black disk, and horizontal sighting ranges for San Quintín Bay, Baja California, were developed. Radiometric PAR profiles were used to calculate KPAR. Vertical (ZD and horizontal (HS sighting ranges were measured with white (Secchi depth or ZSD, HSW and black (ZBD, HSB targets. The empirical power models KPAR = 1.48 ZSD –1.16, KPAR = 0.87 ZBD –1.52, KPAR = 0.54 HSW –0.65 and KPAR = 0.53 HSB –0.92 were developed for the corresponding relationships. The parameters of these models are not significantly different from those of models developed for Punta Banda Estuary, another Baja California lagoon, with the exception of the one for the KPAR-HSW relationship. Also, parameters of the KPAR-ZSD model for San Quintín Bay and Punta Banda Estuary are not significantly different from those developed for coastal waters near Santa Barbara, California. A set of general models is proposed that may apply to coastal water bodies of northwestern Baja California and southern California (KPAR = 1.45 ZSD –1.10, KPAR = 0.92 ZBD –1.45, and KPAR = 0.70 HSB –1.10. While this approach may be universal, more data are needed to explore the variability of the parameters between different water bodies.

2005-01-01

25

On-going development on MINT's small angle neutron scattering (SANS) facility upgrading and related research activities  

Energy Technology Data Exchange (ETDEWEB)

The TRIGA MARK II Research reactor at the Malaysian Institute for Nuclear Research (MINT) was commissioned in July 1982: next year will be its 20 year criticality. Since then various works have been performed to utilize the neutrons produced from this steady state reactor. Projects undertaken are the development and utilization of the Neutron Radiography (MyNR) and Small Angle Neutron Scattering (MySANS) facilities. Materials research, together with traditional scientific interest in understanding matter at the atomic scale, requires detail knowledge of the arrangement and the dynamics of the atoms or molecules. To enhance Malaysian research and development in this area in particular nanoparticle and nanostructure, MINT has made a dedicated commitment to strengthen the utilizing and maintaining the existing small angle neutron scattering facility to its optimal. This paper describes the recent progress of the MySANS facility and its proposed applications in materials science and technology research and education. Both management and technical strategies are generally explained. In addition a future work plan is also noted. (author)

Mohamed, Abdul Aziz Bin; Mohd, Shukri Bin; Muhammad, Azali Bin [Malaysian Institute for Nuclear Technology Research (MINT), Kajang (Malaysia)

2003-03-01

26

On-going development on MINT's small angle neutron scattering (SANS) facility upgrading and related research activities  

International Nuclear Information System (INIS)

The TRIGA MARK II Research reactor at the Malaysian Institute for Nuclear Research (MINT) was commissioned in July 1982: next year will be its 20 year criticality. Since then various works have been performed to utilize the neutrons produced from this steady state reactor. Projects undertaken are the development and utilization of the Neutron Radiography (MyNR) and Small Angle Neutron Scattering (MySANS) facilities. Materials research, together with traditional scientific interest in understanding matter at the atomic scale, requires detail knowledge of the arrangement and the dynamics of the atoms or molecules. To enhance Malaysian research and development in this area in particular nanoparticle and nanostructure, MINT has made a dedicated commitment to strengthen the utilizing and maintaining the existing small angle neutron scattering facility to its optimal. This paper describes the recent progress of the MySANS facility and its proposed applications in materials science and technology research and education. Both management and technical strategies are generally explained. In addition a future work plan is also noted. (author)

27

Control estructural en el emplazamiento del volcanismo y mineralizaciones neógenas, distrito Cañada Honda, San Luis Structural control on Neogene volcanism and related ore deposits at Cañada Honda district, San Luis province  

Directory of Open Access Journals (Sweden)

Full Text Available Emplazada en la zona de transición sur del segmento de flat-slab pampeano y directamente vinculada a la horizontalización de la placa de Nazca, la faja volcánica terciaria de San Luis delata la migración que experimentó el arco magmático andino a la latitud de los 33º S en tiempos mio-pliocenos. Esta faja volcánica comprende una serie de distritos metalogenéticos de gran importancia en las Sierras Pampeanas de San Luis. Las rocas volcánicas y mineralizaciones de la faja volcánica terciaria se encuentran representadas en los campos volcánicos La Carolina, Cañada Honda - Cerros Largos, Cerros del Rosario y El Morro, dispuestos saltuariamente según una dirección ONO-NO. Las edades K-Ar disponibles indican que el volcanismo se habría iniciado más tempranamente en el sector occidental de esta faja, y que habría finalizado ~ 10 Ma más tarde en la región oriental. El distrito Cañada Honda, el más antiguo y longevo de esta faja volcánica, registra eventos volcánicos e hidrotermales cuyas edades varían entre 12-13 Ma y 7,3 Ma, abarcando facies lávico-hipabisales y volcaniclásticas. Los resultados del análisis estructural demuestran el importante control que, directa o indirectamente, habrían ejercido las estructuras previas en el emplazamiento de las rocas volcánicas y mineralizaciones. Análisis de fábrica deformacional y cinemático han permitido reconocer dos asociaciones volcano-tectónicas diferentes. una de estas asociaciones se vincularía a la reactivación dextral de estructuras paralelas a la foliación del basamento. La asociación principal estaría vinculada con el desarrollo de dos depresiones volcano-tectónicas alineadas en dirección ONO-NO. Sus estructuras principales, de orientación ONO-NO, revelan componentes de desplazamiento senestral y normal tanto a escala del distrito Cañada Honda como de la faja volcánica terciaria.Located at the transitional southern end (33° S of the Pampean flat-slab, the Tertiary volcanic belt records the eastward migration of the Andean volcanic arc due to the flattening of the Nazca Plate in Mio-Pliocene times. The tertiary volcanic belt encompasses several very important metallogenetic districts in the San Luis Pampean Ranges. Volcanic rocks and associated ore-deposits crop out following a NW-WNW trending belt at La Carolina, Cañada Honda - Cerros Largos, Cerros del Rosario and El Morro volcanic fields. The available geochronological data indicate that the volcanic activity began early at the western end of the belt and ended ~ 10 Ma later at its eastern border. Cañada Honda district represents the oldest and longest-lived volcanic field of the tertiary volcanic belt. It records eruptive events and related hydrothermal alteration from 12-13 Ma to 7.3 Ma, including lavas and volcaniclastic products. Preliminary structural analysis shows that previous structures have strongly controlled, either directly or indirectly, the emplacement of volcanic rocks and related mineral deposits. Kinematic and strain fabric analyses allow to recognize two volcano-tectonic associations. One of these associations would be related to dextral reactivations of structures parallel to basement foliation. On the other hand, the main one would be linked with the generation of two volcano-tectonic depressions which are aligned in a NW-WNW direction. Their dominant structures trend NW-WNW and reveal sinistral-normal motions, both at local and Tertiary volcanic belt scales.

María Silvia Japas

2010-12-01

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Control estructural en el emplazamiento del volcanismo y mineralizaciones neógenas, distrito Cañada Honda, San Luis / Structural control on Neogene volcanism and related ore deposits at Cañada Honda district, San Luis province  

Scientific Electronic Library Online (English)

Full Text Available SciELO Argentina | Language: Spanish Abstract in spanish Emplazada en la zona de transición sur del segmento de flat-slab pampeano y directamente vinculada a la horizontalización de la placa de Nazca, la faja volcánica terciaria de San Luis delata la migración que experimentó el arco magmático andino a la latitud de los 33º S en tiempos mio-pliocenos. Est [...] a faja volcánica comprende una serie de distritos metalogenéticos de gran importancia en las Sierras Pampeanas de San Luis. Las rocas volcánicas y mineralizaciones de la faja volcánica terciaria se encuentran representadas en los campos volcánicos La Carolina, Cañada Honda - Cerros Largos, Cerros del Rosario y El Morro, dispuestos saltuariamente según una dirección ONO-NO. Las edades K-Ar disponibles indican que el volcanismo se habría iniciado más tempranamente en el sector occidental de esta faja, y que habría finalizado ~ 10 Ma más tarde en la región oriental. El distrito Cañada Honda, el más antiguo y longevo de esta faja volcánica, registra eventos volcánicos e hidrotermales cuyas edades varían entre 12-13 Ma y 7,3 Ma, abarcando facies lávico-hipabisales y volcaniclásticas. Los resultados del análisis estructural demuestran el importante control que, directa o indirectamente, habrían ejercido las estructuras previas en el emplazamiento de las rocas volcánicas y mineralizaciones. Análisis de fábrica deformacional y cinemático han permitido reconocer dos asociaciones volcano-tectónicas diferentes. una de estas asociaciones se vincularía a la reactivación dextral de estructuras paralelas a la foliación del basamento. La asociación principal estaría vinculada con el desarrollo de dos depresiones volcano-tectónicas alineadas en dirección ONO-NO. Sus estructuras principales, de orientación ONO-NO, revelan componentes de desplazamiento senestral y normal tanto a escala del distrito Cañada Honda como de la faja volcánica terciaria. Abstract in english Located at the transitional southern end (33° S) of the Pampean flat-slab, the Tertiary volcanic belt records the eastward migration of the Andean volcanic arc due to the flattening of the Nazca Plate in Mio-Pliocene times. The tertiary volcanic belt encompasses several very important metallogenetic [...] districts in the San Luis Pampean Ranges. Volcanic rocks and associated ore-deposits crop out following a NW-WNW trending belt at La Carolina, Cañada Honda - Cerros Largos, Cerros del Rosario and El Morro volcanic fields. The available geochronological data indicate that the volcanic activity began early at the western end of the belt and ended ~ 10 Ma later at its eastern border. Cañada Honda district represents the oldest and longest-lived volcanic field of the tertiary volcanic belt. It records eruptive events and related hydrothermal alteration from 12-13 Ma to 7.3 Ma, including lavas and volcaniclastic products. Preliminary structural analysis shows that previous structures have strongly controlled, either directly or indirectly, the emplacement of volcanic rocks and related mineral deposits. Kinematic and strain fabric analyses allow to recognize two volcano-tectonic associations. One of these associations would be related to dextral reactivations of structures parallel to basement foliation. On the other hand, the main one would be linked with the generation of two volcano-tectonic depressions which are aligned in a NW-WNW direction. Their dominant structures trend NW-WNW and reveal sinistral-normal motions, both at local and Tertiary volcanic belt scales.

María Silvia, Japas; Nilda Esther, Urbina; Patricia, Sruoga.

2010-12-01

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Butyltin compounds and their relation with organic matter in marine sediments from San Vicente Bay-Chile.  

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Tributyltin and its degradation products, mono-and dibutyltin have been determined in sediments collected in some representative sites in San Vicente Bay, Chile. The organic matter contents of sediments and water collected simultaneously from the same sampling sites were also determined. High levels of total organic carbon were found in sediments, especially in those from the northern part of the bay (1.80-8.87%). Good correlations were found between total organic carbon and the oxidizable and refractory carbon fractions. Among the butyltin species determined, TBT presented the highest levels, ranging from 14 to 1,560 ng Sn g(-1) dry weight. Concentration ratios of TBT to DBT ranged between 1.33 and 3.10, showing a high degree of contamination in sediments of this Chilean bay. All data obtained were analysed by the chemometric method of principal components analysis. A strong correlation was found between TBT and DBT concentrations in sediments, the different organic matter contents in sediments and water. In marine organisms only TBT was detected, containing the filterer organism Semele solida higher level than Perumytilus purpuratus and Pyura chilensis (220, 150 and 120 ng Sn g(-1) dry weight, respectively). For the alga Rodoficea iridae the TBT concentration was 60 ng Sn g(-1) dw. Comparatively, these values are higher than those reported for the same kind of marine organisms worldwide. The different samples from San Vicente Bay were found to be contaminated by TBT. This contamination can be attributed to the different anthropogenic activities taking place in the bay. PMID:18651232

Pinochet, Hugo; Tessini, Catherine; Bravo, Manuel; Quiroz, Waldo; De Gregori, Ida

2009-08-01

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San Marino.  

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San Marino, an independent republic located in north central Italy, in 1983 had a population of 22,206 growing at an annual rate of .9%. The literacy rate is 97% and the infant mortality rate is 9.6/1000. The terrain is mountainous and the climate is moderate. According to local tradition, San Marino was founded by a Christian stonecutter in the 4th century A.D. as a refuge against religious persecution. Its recorded history began in the 9th century, and it has survived assaults on its independence by the papacy, the Malatesta lords of Rimini, Cesare Borgia, Napoleon, and Mussolini. An 1862 treaty with the newly formed Kingdom of Italy has been periodically renewed and amended. The present government is an alliance between the socialists and communists. San Marino has had its own statutes and governmental institutions since the 11th century. Legislative authority at present is vested in a 60-member unicameral parliament. Executive authority is exercised by the 11-member Congress of State, the members of which head the various administrative departments of the goverment. The posts are divided among the parties which form the coalition government. Judicial authority is partly exercised by Italian magistrates in civil and criminal cases. San Marino's policies are tied to Italy's and political organizations and labor unions active in Italy are also active in San Marino. Since World War II, there has been intense rivalry between 2 political coalitions, the Popular Alliance composed of the Christian Democratic Party and the Independent Social Democratic Party, and the Liberty Committee, coalition of the Communist Party and the Socialist Party. San Marino's gross domestic product was $137 million and its per capita income was $6290 in 1980. The principal economic activities are farming and livestock raising, along with some light manufacturing. Foreign transactions are dominated by tourism. The government derives most of its revenue from the sale of postage stamps to collectors around the world and from payment of an annual budget subsidy by the Italian government. Despite its close ties with Italy, San Marino has maintained its distinctive status for centuries. PMID:12178101

1985-02-01

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Relación entre algunas técnicas de reparación de hipospadias y complicaciones en el Hospital Universitario San Vicente de Paul 1986- 2005 / Relation between some thecniques of hypospadias repair and complications: Universitary San Vicente de Paul Hospital 1986-2005  

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Full Text Available SciELO Spain | Language: Spanish Abstract in spanish Objetivo: El éxito en la reparación quirúrgica de hipospadias depende de variables propias del paciente y de variables relacionadas con la técnica quirúrgica. El cirujano dispone de varias técnicas quirúrgicas, lo que obliga ha escoger la técnica mas indicada para obtener los mejores resultados. El [...] objeto de este estudio retrospectivo fue evaluar las técnicas quirúrgicas utilizadas y su asociación con complicaciones postoperatorias. Metodología: Es un estudio descriptivo y retrospectivo en el cual se revisaron las historia clínicas de 207 pacientes sometidos a corrección de hipospadias en el Hospital Universitario San Vicente de Paúl, entre enero de 1986 y diciembre de 2005. Resultados: Se revisaron un total de 207 historias clínicas, la edad de cirugía fue entre 1 y 14 años de edad. La frecuencia de las técnicas utilizadas fueron: Duckett 38,7%, Mathieu 30%, MAGPI 11.6%, Snodgrass 6.3% y otras técnicas representaron en pacientes 14%. Las complicaciones postoperatorias fueron: Hemorrágicas (1,9%), Infecciosas (1.9%), divertículos uretrales (3,9%), cuerda ventral residual (5.8%), dehiscencias (8,7%), estenosis (23,2%) y fístulas (41%). El desarrollo de estenosis es un factor de riesgo para la aparición de fístulas, y el uso de PDS como material de sutura fue un factor protector estadísticamente significativo. El cubrimiento de la uretroplastia con otra capa de tejido, la edad para la corrección, y el tiempo que permaneció el paciente con derivación uretral no resultaron variables estadísticamente significativas para la prevención de complicaciones postoperatorias. La estenosis y el uso de PDS como material de sutura si resultaron variables significativas en la reducción de complicaciones postoperatorias (p Abstract in english Objective: The incidence of hypospadias has been increasing in the last decades. Successful hypospadias repair depends on patient factors and surgical technique, a factor closely related to the surgeon’s experience. The aim of this descriptive, retrospective study was to determine the preferred tech [...] nique and its association with postoperative complications. Methods: Charts of 207 patients who had had hypospadias repair performed between January 1986 and December 2005, in the San Vicente de Paul University Hospital, were reviewed. Results: Hypospadias repair was performed in patients between 1 and 14 years of age. Duckett technique was performed in 38.7%, Mathiew technique in 30% MAGPI technique in 11.6%, Snodgrass in 6.3% and other techniques in 14% of the patients. Postoperative complications included hemorrhagic complications (1.9%), infectious complications (1.9%), urethral diverticular dilatation (3.9%), residual ventral chordee (5.8%), failure of urethroplasty, (8.7%), strictures (23%), and fistulas (41%). Strictures was the most important risk factor for postoperative fistulas (p0.05). Patients with hypospadias repair with PDS sutures had a lower incidence of postoperative fistulas (p

J.A., Martínez Montoya; A.A., Chams Anturi; D.F., Contreras Pérez.

2008-03-01

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Public Relations Accreditation. Proceedings of the Forum of the Commission on Public Relations-Speech Communication Association (2nd, San Francisco, November 18-21, 1989).  

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The first of five articles contained in these public relations accreditation proceedings is a guide for institutions entitled "Accreditation May or May Not Be For You: A Review of Accreditation in Public Relations" (Bonita Dostal Neff). Appended to this article are: International Communication Association's (ICA's) Public Relations Interest Group…

Neff, Bonita Dostal, Ed.

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/ Prenatal care according to the NOM-007 norm, which relates to maternal morbidity in a health center in San Luis Potosí (2008)  

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Full Text Available SciELO Colombia | Language: Spanish Abstract in spanish RESUMEN La mortalidad materno-infantil refleja el grado de desarrollo social y económico de un país, por lo que la salud reproductiva es una prioridad sanitaria; su prevención depende directamente de la cobertura y calidad de los servicios de salud. OBJETIVOS: evaluar el apego de la atención prenata [...] l a la NOM 007 y su correlación con la morbilidad materna en una unidad de salud de San Luis Potosí, México. METODOLOGIA:estudio descriptivo, correlacional y cuantitativo, cuya unidad de análisis fueron 571 expedientes de embarazadas atendidas durante el 2008. Para probar la hipótesis se utilizó r de Pearson, p = 0,05. RESULTADOS: el rango de edad osciló entre 13 y 43 años, 37,1% adolescentes; 44,3% se incorporó a la atención en el segundo trimestre del embarazo; 38,2% cumplió con mínimo cinco consultas; 46,4% presentó morbilidad, con la infección urinaria como la más común (224 casos). El apego de la atención prenatal fue adecuado en 2,6% de los casos, según las acciones efectuadas; las de promoción de salud fueron las menos realizadas. CONCLUSION: el nivel de apego de la atención prenatal a la NOM 007 se calificó inadecuado en 97,4%, coincidiendo con morbilidad materna (87,5 -100%); esto podría relacionarse con consultas más frecuentes para algunas mujeres, el ingreso tardío a la atención y la consecuente reducción del tiempo para la realización de las acciones. La correlación resultó contraria a lo esperado, pues a mayor apego de la atención prenatal a la norma, mayor morbilidad materna se presentó (r = 0,318, p Abstract in english Mother and child mortality reflects the level of social and economic development of a country; therefore, reproductive health is a sanitary priority. Mortality prevention depends directly on the coverage and quality of health services. OBJECTIVE: to assess the compliance of prenatal care with the NO [...] M 007 norm and its correlation with maternal morbidity in a health center located in San Luis Potosí, Mexico. METHOGOLOGY: a descriptive, correlational, and quantitative study in which the units of analysis were the medical records of 571 pregnant women cared for during 2008. In order to prove the hypothesis, Pearson’s r was used. The p value was ? 0.05. RESULTS: ages ranged from 13 to 43 years. Additionally, 37.1% of the patients were teenagers and 44.3% began receiving attention during the second trimester of their pregnancy; 38.2% attended at least five medical appointments, and 46.4% had morbidity. For the latter group, urinary infection was the most common condition (224 cases). Prenatal attention was adequate in 2.6% of the cases according to the actions performed. Health promotion actions were the least frequent. CONCLUSION: the level of compliance with the NOM 007 norm for prenatal care was considered inadequate in 97.4% of the cases and was consistent with maternal morbidity (87.5-100%). This could be related to more frequent appointments for some women and with late treatment, which resulted in less time to perform said actions. Contrary to expectations, greater compliance meant higher maternal morbidity (r = 0.318, p

Rosa I., Vega M; Alicia G., Barron; Lucila P., Acosta R.

2012-12-01

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Formas de contratación y relaciones de trabajo en la cosecha de vid de la provincia de San Juan, Argentina / Types of workers' recruitment and labor relations in the grape harvest at the province of San Juan, Argentina  

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Full Text Available SciELO Argentina | Language: Spanish Abstract in spanish Este artículo analiza, para el caso del mercado de trabajo para tareas de cosecha en la producción de uvas para la elaboración de vinos de baja calidad enológica en el departamento Sarmiento de la provincia de San Juan, la relación que se establece entre las modalidades de contratación y la presenci [...] a de conflictos en el sitio de producción a nivel de la organización del trabajo, la extensión y características de la jornada de trabajo y, los niveles y sistemas de remuneración. Se trata de circunstancias que ponen en tensión de manera continua y cotidiana a la relación de trabajo y van a determinar diferentes respuestas por parte de empleadores, trabajadores y contratistas de mano de obra. El análisis realizado muestra que la conflictividad se intensifica en algunos momentos y bajo determinadas condiciones provocando interrupciones de la jornada de trabajo, despidos, resistencias, medidas de disciplinamiento, entre otras tensiones propias de la relación de trabajo. Abstract in english This article analyzes the case of the labor market for harvesting tasks in the production of low quality grapes for wine making in the Sarmiento department at the province of San Juan. The main concern is about the relationship established between the types of labor contracts and the presence of lab [...] or conflicts in the site of production at the level of the work organization, the size and characteristics of the workday, and the level as well remuneration systems. It is assumed that these circumstances will put pressure on everyday working relationships and will determine different responses from employers, workers, and labor contractors as well. The analysis shows that the conflict will intensify at certain times and under certain conditions, causing workday interruptions, layoffs, resistances, disciplining measures, among other tensions taking place at the working relationship itself.

Guillermo, Neiman; Germán, Quaranta; Mariela, Blanco.

2013-12-01

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The Migration Experience as It Relates to Cargo Participation in San Miguel Cuevas, Oaxaca / La experiencia migratoria en relación con la participación en cargos en San Miguel Cuevas, Oaxaca  

Scientific Electronic Library Online (English)

Full Text Available SciELO Mexico | Language: English Abstract in spanish Este artículo ofrece un recuento de los continuos efectos de la migración sobre el gobierno municipal y la organización de una comunidad mixteca: San Miguel Cuevas, Oaxaca, México. Legalmente constituida como un autogobierno municipal indígena, en décadas recientes, Cuevas ha sido reconstituida como [...] una comunidad transnacional, cuyos ciudadanos radican principalmente en ella y en Fresno, California. La creciente circularidad y permanente migración de Cuevas a estados unidos desde finales de los ochenta, así como los usos y costumbres impuestos por la vida comunitaria en Cuevas, pone a sus varones migrantes en una situación complicada para cumplir sus obligaciones familiares y comunitarias -cívicas y ceremoniales (cargos)-, que se requieren para mantener su ciudadanía y residencia en Cuevas y tener acceso a tierras comunales y otros recursos. Abstract in english This article provides an overview of the ongoing effects of migration on municipal governance and community organization in the Mixtec town of San Miguel Cuevas in Oaxaca, Mexico. Legally constituted as a self-governing indigenous municipality, Cuevas has recently been reconstituted as a transnation [...] al community whose citizens now reside mainly in Cuevas and Fresno, California. Increased circular and permanent migration to the united States since the late 1980s and the customary law (usosy costumbres) enforced in the community, situates its migrants in a complex array of familial and community obligations that require fulfilling civic and ceremonial obligations (cargos) in order - to maintain one's citizenship and residence in Cuevas and to have access to its communally owned lands and other resources.

Silvia, Ventura Luna.

2010-06-01

36

San Fernando Valley History  

Science.gov (United States)

A historical tour through the world of San Fernando Valley is always a good idea, and the folks at the California State University-Northridge have made this possible via their amazing archive of digitized materials. The project is based at their Oviatt Library, and it contains historically significant documents, manuscripts, photographs and related graphic materials from public and private collections in the San Fernando Valley. The project started in 2000, and today visitors can browse the collection at their leisure. First-time visitors can look over the "Topics" here, which include "Animals", "Economics", "Industries", and six other areas. The "Communities" area features a fun map with all of the communities of the area on it. Clicking on one of the icons will take users to archived items associated with each place. Also, visitors shouldn't miss the "Transportation" tab as they can view classic images of the old Pacific Electric Railway as well as images of early bus terminals and more contemporary shots of Amtrak in action.

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Factores de riesgo relacionados al uso de drogas ilegales: perspectiva crítica de familiares y personas cercanas en un centro de salud público en San Pedro Sula, Honduras Fatores de risco relacionados ao uso de drogas ilegais, perspectiva crítica de familiares e pessoas próximas, em um centro da saúde público em San Pedro Sula, Honduras Risk factors related to the use of illegal drugs: the critial perspective of drug users' relatives and acquaintances at a public health center in San Pedro Sula, Honduras  

Directory of Open Access Journals (Sweden)

Full Text Available En este estudio, se presentan datos cuantitativos del estudio multicéntrico, multimétodos, de corte transversal realizado en un centro de salud público en San Pedro Sula, en Honduras. Su objetivo es describir la perspectiva crítica que tienen los familiares o personas, que se consideran afectadas por tener a alguien cercano que usa o ha usado drogas ilegales, con relación a factores de riesgo. Los datos se obtuvieron mediante una encuesta con 100 entrevistados. La mayor parte de las personas informantes eran mujeres pobres con baja escolaridad. Los consumidores eran en su mayoría hombres con edad promedio de 23,3 años. La droga más usada fue la marihuana (78% seguida de crack/cocaína (72%, pegamento/inhalantes (27%, alucinógenos (éxtasis/LSD (3%, anfetaminas/estimulantes (1% y heroína (1%. Los factores de riesgo identificados fueron la experiencia previa con alcohol/tabaco, el tener amigos/amigas que usan drogas, la falta de conocimiento, la baja autoestima , la edad, entre otros factores personales, familiares y sociales. Se concluye que es necesario fortalecer las medidas de prevención y protección.São apresentados, aqui, dados quantitativos de um estudo multicêntrico, multimétodos, de corte transversal, realizado em um centro de saúde pública em San Pedro Sula, Honduras. O objetivo foi descrever a perspectiva crítica dos membros da família ou pessoas que se sentem afetadas por terem alguém próximo que usa ou usou drogas ilegais, em relação aos fatores de risco. Os dados foram coletados através de questionário aplicado em 100 indivíduos. A maioria era composta por mulheres pobres, com pouca escolaridade. Os consumidores eram majoritariamente varões, com idade média de 23,3 anos. A droga mais utilizada foi a maconha (78%, seguida por crack/cocaína (72%, cola/inalantes (27%, alucinógenos (ecstasy/LSD (3%, anfetaminas/estimulantes (1%, heroína (1%. Entre os fatores de risco identificados estão: experiência anterior com álcool/fumo, ter amigos/amigas que usam drogas, falta de conhecimento, baixa autoestima, idade, entre outros fatores pessoais, familiares e sociais. Em conclusão, deve-se reforçar a prevenção e proteção.This article presents quantitative data from a multicenter, cross-sectional study, which was performed at a public health center in San Pedro Sula, Honduras, using multiple methods. The objective of the study was to describe the critical perspective of people who reported being affected by their relationship with an illicit drug user (relative or acquaintance in terms of risk factors. Data collection was performed using 100 questionnaires. Most participants were women with low education levels. Drug users were mostly men, with an average age of 23.3 years. The most consumed drug was marijuana (78%, followed by crack/cocaine (72%, glue/inhalants (27%, hallucinogens (ecstasy/LSD (3%, amphetamines/stimulants (1%, and heroin (1%. The identified risk factors include: previous experience with alcohol/tobacco, having friends who use drugs, lack of information, low self-esteem, age, and other personal, family and social factors. In conclusion, prevention and protection should be reinforced.

Gladys Magdalena Rodríguez Funes

2009-01-01

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Las cabeceras del río Grande de San Juan y sus relaciones con áreas vecinas durante los últimos momentos del desarrollo cultural prehispánico / The upstream of Río Grande de San Juan and their relations with adjacent areas during the last moment of cultural prehispanic development  

Scientific Electronic Library Online (English)

Full Text Available SciELO Argentina | Language: Spanish Abstract in spanish Se presentan los resultados de los trabajos arqueológicos desarrollados por los autores en las cabeceras del Río Grande de San Juan (Provincia de Jujuy, Argentina). Estas recientes investigaciones se han realizado en los sitios Abra de Lagunas, en la zona del río Orosmayo, y en Guayatayoc y Pajchela [...] , en las cercanías de la localidad de Cusi Cusi. Se analizan indicadores tales como emplazamiento y localización de sitios, patrón de asentamiento, construcciones agrícola-ganaderas, elementos relacionados con actividades rituales y/o sociales (menhires, montículos, entre otros), presencia de "hornos" (chullpas) de planta circular o elíptica y techo en falsa bóveda, alfarería y artefactos elaborados en piedra, madera y hueso. Asimismo, se realiza un análisis comparativo de estos indicadores con otros de regiones aledañas, especialmente curso medio del río Grande de San Juan, laguna de Vilama, Yavi, Pozuelos, Rinconada, Cochinoca, Casabindo y Susques (Provincia de Jujuy) y sur Lípez (Bolivia). Tanto en los rasgos ambientales de la región como en los contextos culturales recuperados, se observaron características propias, hecho que permite plantear, a modo de hipótesis, una relativa particularidad cultural, pero también algunas similitudes con regiones vecinas. Finalmente, se exponen los avances alcanzados respecto de esta problemática, concluyendo que durante el Período Tardío-Inca, la región de las cabeceras del río Grande de San Juan no sólo habría sido una zona de paso, sino también una región con asentamientos estables de cierta envergadura y ocupación permanente. Abstract in english Conclusions of archaeological studies at the upstream of Río Grande de San Juan (Province of Jujuy, Argentina) are stated. Studies dealt here, were done in Abra de Lagunas, Orosmayo river area, in Guayatayoc and Pajchela, nearby Cusi Cusi. Sites emplacement and location, settlement pattern, agricult [...] ural and cattle-raising constructions, elements related with ritual and/or social activities like menhirs, hillocks among other things, "hornos" (chullpas) with circular or elliptical base and roof in false vault, pottery and pots in stone, wood and bone were analyzed. Later, a comparative analysis of these indicators with those of surrounding districts was made, specifically medium stream of Río Grande de San Juan, lake of Vilama, Yavi, Pozuelos, Rinconada, Cochinoca, Casabindo and Susques (Province of Jujuy) and Lípez (south of Bolivia). Typical characteristics were observed so much in the environmental features of the region as in the the cultured recovered contexts. These facts bring up as a hypothesis that in this region there is a relative cultural singularity, though it has some similitudes with the nearby areas. It is concluded that during the Late-Inca Period, the headwaters of Río Grande de San Juan could have been not only an emplacement on the way but also one of permanent occupation.

Carlos Alberto, De Feo; Ana María, Fernández; María Gabriela, Raviña.

2007-07-01

39

Linear chrono-amperometry using re-dissolution: application to halides; La chronoamperometrie lineaire par redissolution: application aux halogenures  

Energy Technology Data Exchange (ETDEWEB)

The possibility of applying linear chrono-amperometry to analysis was studied using a falling-drop mercury electrode. Measurements of the cations were carried out by direct reduction or by prior formation of an amalgam, which is then oxidized. Using the first technique, the minimum concentration that can be attained is about 10{sup -6} M and the reproducibility of the results is of the order of 2%. With the second method the sensitivity is much improved: in the concentration range of 10{sup -7} to 10{sup -8} M, the scatter of the results is less than 10% if the agitation and temperature conditions are kept constant. The halides are determined by re-dissolving the mercurous halide deposit formed by electrolysis. From the analytical point of view, the sensitivity is limited in the domain where the phenomena can be interpreted and used. In the case of the chloride ion the lower limit of this zone is close to 10{sup -5} M; it is 10{sup -6} M for the bromide and less than 10{sup -7} M for the iodide. For lower concentrations, simple laws that might be applied in analysis are no longer valid. However, the splitting of the peak observed during the reduction of the mercurous iodide deposit was interpreted as showing that the mono-molecular Hg{sub 2}I{sub 2} layer formed on the drop has particular electrochemical properties. (authors) [French] Les possibilites analytiques de la chronoamperometrie lineaire ont ete etudiees en utilisant une electrode de mercure a goutte pendante. Le dosage des cations a ete effectue par reduction directe ou par formation prealable d'un amalgame puis oxydation de celui-ci. Par la premiere technique la concentration minimale que l'on peut atteindre est d'environ 10{sup -6} M et la reproductibilite des resultats est de l'ordre de 2%. Par la seconde methode la sensibilite se trouve grandement amelioree; dans une zone de concentration comprise entre 10{sup -7} et 10{sup -8} M, la dispersion des determinations est inferieure a 10% si les conditions d'agitation et de temperature sont maintenues constantes. Le dosage des halogenures est realise par redissolution d'un depot d'halogenure mercureux constitue par une electrolyse prealable. Du point de vue analytique, la sensibilite est limitee au domaine de concentrations ou les phenomenes sont interpretables et exploitables. Dans le cas de l'ion chlorure la limite inferieure de ce domaine est voisine de 10{sup -5} M; elle est de 10{sup -6} M pour le bromure et inferieure a 10{sup -7} M pour l'iodure. Pour des concentrations inferieures, les lois simples susceptibles d'applications analytiques ne sont plus verifiees. Cependant, le dedoublement du pic observe lors de la reduction de l'iodure mercureux depose a ete interprete en mettant en evidence les proprietes electrochimiques particulieres de la couche mono-moleculaire de Hg{sub 2}I{sub 2} formee sur la goutte. (auteurs)

Perchard, J.-P.; Buvet, M.; Molina, R. [Commissariat a l' Energie Atomique, Centre d' Etudes Nucleaires de Fontenay-aux-Roses, 92 (France)

1966-06-01

40

San Diego Zoo: Kid Territory  

Science.gov (United States)

This San Diego Zoo website is absolutely packed with fun and informative stuff for kids, and features not only the residents of the zoo, but also the people who work there. Read All About It offers a look at how the San Diego Zoo began, why we give scientific names to animals, why animal enrichment is important, and much more. Science in Action offers simple experiments to do at home or in the classroom, like exploring what life would be like without an opposable thumb (with tape, not via amputation). The website also provides interesting essays on zoo-related careers, as well as cool multimedia games, animal-themed recipes, and loads of other great features.

41

San Juan Uchucuanicu: évolution historique  

Directory of Open Access Journals (Sweden)

Full Text Available La communauté de San Juan est reconnue depuis 1939. Une première partie concerne l?organisation de la reducción de San Juan vers le milieu du XVIe siècle. Le poids fiscal s?exerce durement sur le village et la crise est générale dans toute la vallée du Chancay au XVIIe. siècle. La christianisation des habitants est définitive au milieu de ce même siècle. C?est vers la fin du XVIIe siècle et durant tout le XVIIIe que se multiplient les conflits entre San Juan et les villages voisins liés aux terrains de pâture et à la possession de l?eau. La deuxième partie du travail concerne les rapports de la communauté de San Juan avec le Pérou contemporain : contrainte fiscale toujours très lourde durant la fin de l?époque coloniale, exactions des militaires juste avant l?indépendance. La période républicaine voit toujours les conflits avec les villages voisins mais aussi la naissance de familles qui cherchent à retirer le maximum de la communauté. Les terres sont divisées et attribuées : la détérioration de l?organisation communale traditionnelle est manifeste. L4es conflits se multiplient entre petits propriétaires, mais aussi avec les haciendas voisines : c?est l?apparition d?une véritable lutte de classes. La situation actuelle est incertaine, le poids de l?économie marchande se développe avec l?exode des jeunes. Que sera la communauté San Juan à la fin de ce siècle? La comunidad de San Juan está reconocida desde 1939. La primera parte concierne a la organización de la 'reducción' de San Juan hacia mediados del siglo XVI. El peso fiscal se ejerce duramente sobre el pueblo y en el siglo XVII la crisis es general en todo el valle de Chancay. Hacia mediados del mismo siglo la cristianización de los habitantes es definitiva. Es hacia fines del siglo XVII y durante todo el siglo XVIII que se multiplican los conflictos entre San Juan y los pueblos vecinos, los que están relacionados con los terrenos de pastoreo y la posesión del agua. La segunda parte del trabajo concierne a las relaciones de la comunidad de San Juan con el Perú contemporáneo: obligaciones fiscales cada vez más pesadas hacia fines de la época colonial, exacciones de los militares justamente antes de la independencia. El período republicano ve siempre los conflictos entre los pueblos vecinos pero igualmente el nacimiento de familias que procuran sacar el máximo de la comunidad. Las tierras son divididas y atribuidas: el deterioro de la organización comunal tradicional se pone de manifiesto. Se multiplican los conflictos entre pequeños propietarios, pero también con las haciendas vecinas: es la aparición de una verdadera lucha de clases. La situación actual es incierta, el peso de la economía comercial se desarrolla con el éxodo de los jóvenes. ¿Que será de la comunidad de San Juan a fines de este siglo? San Juan community has been recognized since 1939. In the first part, we will show' the organization of San Juan's reducción at the middle of the XVI century. The fiscal burden on the village was hard and this crisis was general all over the valley of Chancay during the XVII century. Christianisation of the inhabitants was completed in the middle of this same century. It is only at the end of this century and along all the XVII that the conflicts between San Juan and the neighboring villages were multiplied, tied to pasture lands and water possession In the second part, we will show the relations of San Juan with the contemporary Peru: always very hard fiscal constraint at the end of the colonial time and military exactions till the independence. Along the republican period, the conflicts with the neighboring villages persisted but there were also arising families who were trying to take the maximum of the community. Lands were divided and attributed, deterioration of traditional communal organization was visible. Conflicts between small landlords and neighboring haciendas were multiplied A real class struggle appeared. The actual situation seems uncertain but the trading economy b

1975-01-01

42

Linear study and bundle adjustment data fusion; Application to vision localization; Recherche lineaire et fusion de donnees par ajustement de faisceaux; Application a la localisation par vision  

Energy Technology Data Exchange (ETDEWEB)

The works presented in this manuscript are in the field of computer vision, and tackle the problem of real-time vision based localization and 3D reconstruction. In this context, the trajectory of a camera and the 3D structure of the filmed scene are initially estimated by linear algorithms and then optimized by a nonlinear algorithm, bundle adjustment. The thesis first presents a new technique of line search, dedicated to the nonlinear minimization algorithms used in Structure-from-Motion. The proposed technique is not iterative and can be quickly installed in traditional bundle adjustment frameworks. This technique, called Global Algebraic Line Search (G-ALS), and its two-dimensional variant (Two way-ALS), accelerate the convergence of the bundle adjustment algorithm. The approximation of the re-projection error by an algebraic distance enables the analytical calculation of an effective displacement amplitude (or two amplitudes for the Two way-ALS variant) by solving a degree 3 (G-ALS) or 5 (Two way-ALS) polynomial. Our experiments, conducted on simulated and real data, show that this amplitude, which is optimal for the algebraic distance, is also efficient for the Euclidean distance and reduces the convergence time of minimizations. One difficulty of real-time tracking algorithms (monocular SLAM) is that the estimated trajectory is often affected by drifts: on the absolute orientation, position and scale. Since these algorithms are incremental, errors and approximations are accumulated throughout the trajectory and cause global drifts. In addition, a tracking vision system can always be dazzled or used under conditions which prevented temporarily to calculate the location of the system. To solve these problems, we propose to use an additional sensor measuring the displacement of the camera. The type of sensor used will vary depending on the targeted application (an odometer for a vehicle, a lightweight inertial navigation system for a person). We propose to integrate this additional information directly into an extended bundle adjustment, by adding a constraint term in the weighted cost function. We evaluate three methods (based on machine learning or regularization) that dynamically select the weight associated to the constraint and show that these methods can be used in a real time multi-sensor SLAM, and validate them with different types of constraint on the orientation or on the scale. Experiments conducted on real video sequences show that this technique of constrained bundle adjustment reduces the drifts observed with the classical vision algorithms and improves the global accuracy of the positioning system. (author) [French] Les travaux presentes dans ce manuscrit concernent le domaine de la localisation et la reconstruction 3D par vision artificielle. Dans ce contexte, la trajectoire d'une camera et la structure 3D de la scene filmee sont initialement estimees par des algorithmes lineaires puis optimisees par un algorithme non-lineaire, l'ajustement de faisceaux. Cette these presente tout d'abord une technique de recherche de l'amplitude de deplacement (recherche lineaire), ou line search pour les algorithmes de minimisation iterative. La technique proposee est non iterative et peut etre rapidement implantee dans un ajustement de faisceaux traditionnel. Cette technique appelee recherche lineaire algebrique globale (G-ALS), ainsi que sa variante a deux dimensions (Two way-ALS), accelerent la convergence de l'algorithme d'ajustement de faisceaux. L'approximation de l'erreur de reprojection par une distance algebrique rend possible le calcul analytique d'une amplitude de deplacement efficace (ou de deux pour la variante Two way-ALS), par la resolution d'un polynome de degre 3 (G-ALS) ou 5 (Two way-ALS). Nos experimentations sur des donnees simulees et reelles montrent que cette amplitude, optimale en distance algebrique, est performante en distance euclidienne, et permet de reduire le temps de convergence des minimisations. Une difficulte des algorithmes de localis

Michot, J.

2010-12-09

43

Gas-Oil Relative Permeability and Residual Oil Saturation as Related to Displacement Instability and Dimensionless Numbers Étude de la perméabilité relative gaz-huile et de la saturation en huile résiduelle dans le cas d’une instabilité de déplacement et des nombres sans dimension s’y rapportant  

Directory of Open Access Journals (Sweden)

Full Text Available Displacement experiments of the gas-oil system are performed on long core scale models by varying the petrophysical properties and flowing conditions. Experiments are conducted in situations where capillary, gravity and viscous forces are comparable. From oil production history and picture analysis, the threshold for the stability is determined. The experimental findings are comparable to the results of a gradient percolation theory. The effect of destabilized front velocity on relative permeability and residual saturation is investigated. The relative permeabilities determined by using analytical and numerical approaches indicate that higher displacement velocity leads to a higher gas relative permeability and lower oil relative permeability. The remaining oil saturation is found to be much higher for displacement velocity above the stabilized criterion. Displacement morphology including the average remaining oil saturation is then described using dimensionless groups expressed as Bond and capillary number. Experimentally determined remaining oil saturation shows a direct and inverse relation to the capillary and Bond number respectively. Hence, a combined dimensionless group has been proposed to generalize the estimation of remaining and residual oil saturations under the range of dimensionless numbers studied here. Des expériences de déplacement gaz-huile ont été réalisées sur des modèles mis à l’échelle de carottes de grande longueur en faisant varier les propriétés pétrophysiques et les conditions d’écoulement. Pour ces expériences, les forces en présence, capillaires, gravitaires et visqueuses, sont comparables. Le seuil de stabilité est déterminé à partir de l’historique de production et de l’analyse d’images. Les résultats des expériences sont comparables aux conclusions de la théorie de la percolation en gradient. On étudie ensuite l’effet de l’instabilité du front de déplacement sur la perméabilité relative et la saturation résiduelle. Les perméabilités relatives déterminées par des approches analytiques et numériques indiquent qu’une plus grande vitesse de déplacement engendre une plus grande perméabilité relative au gaz et une plus faible perméabilité relative à l’huile. Les résultats indiquent que la saturation en huile à la fin est très supérieure lorsque la vitesse de déplacement se situe au-dessus du critère de stabilité. Les caractéristiques du déplacement, notamment la saturation moyenne en huile en fin de déplacement, sont ensuite décrites à l’aide de groupements sans dimension expressément le nombre de Bond et le nombre capillaire. La saturation en huile en fin de déplacement déterminée expérimentalement s’exprime respectivement par une relation directe avec le nombre capillaire et inverse avec le nombre de Bond. En conséquence, un groupement sans dimension combiné a été proposé afin de généraliser l’estimation de la saturation en fin de déplacement et résiduelle en huile dans la limite des nombres sans dimension étudiés ici.

Rostami B.

2009-11-01

44

Coarse Clasts Imply Substantial Mid-Late Miocene Slip and Complex Kinematics on Miller Creek and Related Faults, East San Francisco Bay Area  

Science.gov (United States)

Coarse-clast study is providing new insight into Neogene slip on poorly understood but potentially important structures between the Hayward and Calaveras faults. The Miller Creek fault (MCF) is a comparatively little studied NW-striking feature exposed in the East Bay Hills east of EBMUD’s Upper San Leandro Reservoir (USLR). Stratigraphic separation on the MCF is locally substantial, with Cretaceous Great Valley Group strata to the west juxtaposed against Neogene units to the east. Outcrop relationships generally indicate a steep westward dip and reverse separation on the MCF, although poorly exposed outcrops suggest near-vertical and eastward dips and/or normal separation on some of the fault's multiple strands. Previous workers have suggested that the MCF continues north as the Moraga fault through the Berkeley Hills and the Moraga and/or Pinole fault east of Point Pinole. The Pinole fault may be an eastern trace of the Moraga system or a separate structure; map geometries suggest steeper dips on it than on the Moraga fault proper. East of the MCF, clast assemblages in the Contra Costa Group (CCG) at USLR are dominated by Coast Range-derived clasts including red, brown, black, and green chert; greywacke; sandstone; vein quartz; Tertiary mafic volcanics; metasediments; blueschist; and metavolcanics. Monterey Group porcellanite is locally present in small quantities. The basal CCG at USLR interfingers with the underlying San Pablo Group (SPG). Age constraints on the CCG at USLR are given by an ~6.2-Ma tuff in the mid- to upper CCG in adjacent Cull Canyon. At Happy Valley, ~15 km NNW of USLR, clast assemblages containing greywacke, blueschist, vein quartz, and metavolcanics suggest that a conglomerate of poorly constrained age (7-9 Ma?) enclosed in typical upper SPG strata and identified as upper SPG by previous workers may actually be a lense of CCG; we tentatively interpret this as a northward continuation of the interfingering CCG-SPG relationship at USLR. West of the Pinole fault/east trace of the Moraga fault at Point Pinole, ~30 km NW of USLR, post-9 Ma conglomerates in the lower Garrity Member of the CCG are dominated by Franciscan-derived clasts—including greywacke; vein quartz; blueschist; and red, green, brown, and black chert—with a lesser component of Great Valley Group sandstone, Tertiary volcanics, and Monterey porcellanite. Upper Garrity conglomerates, which at ~6 Ma are roughly coeval with CCG strata at Cull Canyon, are dominated by Monterey Group porcellanite and laminated chert. Based on similarity in clast compositions, we infer that the Garrity and USLR depocenters were proximal to one another during lower Garrity time (~9 Ma). The change to a Monterey-dominated clast assemblage differing markedly from that in coeval strata at USLR may imply that by upper Garrity time the two depocenters were no longer adjacent. If so, this suggests as much as ~30-35 km of dextral strike slip on the MCF-Moraga fault-Pinole fault trend between 6 and 9 Ma and further implies that the MCF may have been an important strand of the Neogene East Bay slip corridor. Contraction across the MCF thus may be a subordinate overprint on a history dominated by dextral strike slip.

Buising, A. V.; Walker, J. P.; Allen, J. R.

2009-12-01

45

30 January 2012 - Ecuadorian Ambassador Gallegos Chiriboga, Permanent Representative to the United Nations Office and other International Organisations at Geneva and San Francisco de Quito University Vice Chancellor C. Montùfar visiting CMS surface facilities and underground experimental area with CMS Collaboration L. Sulak and Collaboration Deputy Spokesperson T. Camporesi, throughout accompanied by Head of International Relations F. Pauss.  

CERN Multimedia

30 January 2012 - Ecuadorian Ambassador Gallegos Chiriboga, Permanent Representative to the United Nations Office and other International Organisations at Geneva and San Francisco de Quito University Vice Chancellor C. Montùfar visiting CMS surface facilities and underground experimental area with CMS Collaboration L. Sulak and Collaboration Deputy Spokesperson T. Camporesi, throughout accompanied by Head of International Relations F. Pauss.

Michael Hoch

2012-01-01

46

Fossilization of nanobes studied by transmission electron microscopy and constraints related to their population - recent and late quaternary reefbanks (San Salvador Island, the Bahamas; Heron Island, Australia)  

Science.gov (United States)

SEM analyses of rocks from Blow Hole Cave and The Gulf sections (San Salvador Island, Bahamas) found that ca 90-95% of peloids (and minor parts of other particles and cements) are substantially rebuilt into tiny corpuscles of ovoid, rotund cylindrical or slightly bent shapes (50-80 × 60-120 nm). About 20-30% of them form short and branched chains. These fabrics resemble `accumulations of ant eggs', have 40-60% fine porosity, correspond to better morpho-definitions of nanobes (cons. by R.L. Folk, 2002), and put a new light on micritization processes. The rocks strongly rebuilt by nanobes negatively correlate with magnetic susceptibility, but slightly contribute to NGR (uranium, gamma-ray spectrometry). In spite of strongly negative correlation to magnetic horizons, the nanobes are also present there, but to a lesser extent. The suspensions with nanobes (extracted by pump from the pores of rocks preserved in glutaraldehyde) exhibit a variety of preservation stages - from amorphous organics to completely fossilized corpuscles (studied by TEM). Early stages of fossilization are characterized by a gradually increasing amount of very fine crystalline inclusions, which are triangular to tetragonal in shape, and 3-15 nm long (mean size ˜ 6 nm). The TEM diffractograms provided data about face-centered cubic structures of B1 type (NaCl-like), with strongest 2nd and 3rd reflections on 0.240 and 0.170 nm and mean lattice parameter of 0.4813 nm. The substance was clearly identified as CaO. The difference to 0.4802 nm (ICDD data for pure CaO) is explained by effects of impurities Sr (+) > Fe, Mn (-). The number of CaO inclusions fluctuates from a few to 5 × 104 / ? {m3}. The CaO nucleation is possible in natural necrotic high-pH low-Eh organic coagulates; but presence of glutaraldehyde can facilitate the process. Other fossilization stages show unstable amorphous to crystalline calcium carbonate, homogeneous aragonite and calcite, and calcite replacing aragonite along sharp boundaries. The X-ray diffraction data suggest that calcite prevails. The massive nanobe population corresponds to early stages of emergence of banks (according to diagenetic and microbial successions). The short-term nanobe bloom had to be concurrent with early fungal growth in corroded rock micropores. However, the residual nanobe populations survived a die off of the early bloom of nannobes and are still alive (˜ 3 × 103 /{mm3}). A small number of nanobes are spread by endolithic cyanobacteria even in situations, that are not favorable for expansion of nanobe populations (examples from the Heron Island, Australia). / Project A3013209 "Weathering products".

Hladil, J.; Gemperle, A.; Carew, J. L.; Bosak, P.; Slavik, L.; Pruner, P.; Charvatova, K.; Mylroie, J. E.; Jell, J. S.

2003-04-01

47

History of San Marco  

Science.gov (United States)

A brief history is reported of the first San Marco project, a joint program of the United States and Italy. The Project was a three phase effort to investigate upper air density and associated ionosphere phenomena. The initial phase included the design and development of the spacecraft, the experiments, the launch complex, and a series of suborbital flights, from Wallops Island. The second phase, consisting of designing, fabricating, and testing a spacecraft for the first orbital mission, culminated in an orbital launch also from Wallops Island. The third phase consisted of further refining the experiments and spacecraft instrumentation and of establishing a full-bore scout complex in Kenya. The launch of San Marco B, in April 1967, from this complex into an equatorial orbit, concluded the initial San Marco effort.

Caporale, A. J.

1968-01-01

48

San Diego Zoo  

Science.gov (United States)

The Zoological Society of San Diego brings to the web the San Diego Zoo, the San Diego Wild Animal Park, and the Center for Reproduction of Endangered Species. Each unit of the zoo has a main page, from which the user can meet the animals and find out about the humans who watch over them. The photographs of new arrivals at the zoo should be a big draw, and there is informative text underlying the visuals. The "Guest Book" is a game in which users attempt to match animals with their "signatures": the tracks they leave. Use the table of contents to find your way to the animals you're most interested in.

1998-01-01

49

Free treatment, rapid malaria diagnostic tests and malaria village workers can hasten progress toward achieving the malaria related millennium development goals: the Médecins Sans Frontières experience from Chad, Sierra-Leone and Mali  

Directory of Open Access Journals (Sweden)

Full Text Available Halving the burden of malaria by 2015 and ensuring that 80% of people with malaria receive treatment is among the health related targets of the Millennium Development Goals (MDGs. Despite political momentum toward achieving this target, progress is slow and many with malaria (particularly in poor and rural communities in Africa are still without access to effective treatment. Finding ways to improve access to anti-malarial treatment in Africa is essential to achieve the malaria related and other MDG targets. During its work in Chad, Sierra Leone and Mali in the period 2004 to 2008, Médecins Sans Frontières showed that it was possible to significantly improve access to effective malaria treatment through: i the removal of health centre level user fees for essential healthcare for vulnerable population groups, ii the introduction of free community based treatment for children using malaria village workers to diagnose and treat simple malaria in communities where geographical and financial barriers limited access to effective malaria care, iii the improved diagnosis and treatment of malaria using rapid diagnosis tests and artemisinin based combination therapy, at both health facilities and in the community. This paper describes and discusses these strategies and their related impact.

Nadine de Lamotte

2011-03-01

50

1906 San Francisco Earthquake Tsunami  

Science.gov (United States)

A series of visualizations of the tsunami generated by the 1906 earthquake. Included are maps of the San Andreas fault offshore, in San Francisco Bay, diagrams of the magnitude of the slip under the San Francisco Bay, and animations of wave height following the earthqake. Two separate animations are featured as QuickTime movies; one is centered on the Golden Gate Bridge, the other shows the whole San Francisco Bay.

Usgs, Tsunami A.

51

SANS studies of polymers  

International Nuclear Information System (INIS)

Before small-angle neutron scattering (SANS), chain conformation studies were limited to light and small angle x-ray scattering techniques, usually in dilute solution. SANS from blends of normal and labeled molecules could give direct information on chain conformation in bulk polymers. Water-soluble polymers may be examined in H2O/D2O mixtures using contrast variation methods to provide further information on polymer structure. This paper reviews some of the information provided by this technique using examples of experiments performed at the National Center for Small-Angle Scattering Research (NCSASR)

52

Automation of nonlinear calculations in the theory of fusion reactor; Automatisation des calculs non lineaires dans la theorie des reacteurs a fusion  

Energy Technology Data Exchange (ETDEWEB)

1) Introduction: The difficulties of the formulation of the equations of phenomena occurring during the operation of a fusion reactor are underlined. 2) The possibilities presented by analog computation of the solution of nonlinear differential equations are enumerated. The accuracy and limitations of this method are discussed. 3) The analog solution in the stationary problem of the measurement of the discharge confinement is given and comparison with experimental results. 4) The analog solution of the dynamic problem of the evolution of the discharge current in a simple case is given and it is compared with experimental data. 5) The analog solution of the motion of an isolated ion in the electromagnetic field is given. A spatial field simulator used for this problem (bidimensional problem) is described. 6) The analog solution of the preceding problem for a tridimensional case for particular geometrical configurations using simultaneously 2 field simulators is given. 7) A method of computation derived from Monte Carlo method for the study of dynamic of plasma is described. 8) Conclusion: the essential differences between the analog computation of fission reactors and fusion reactors are analysed. In particular the theory of control of a fusion reactor as described by SCHULTZ is discussed and the results of linearized formulations are compared with those of nonlinear simulation. (author)Fren. [French] 1) Introduction. On souligne les difficultes que presente la mise en equation des phenomenes mis en jeu lors du fonctionnement d'un reacteur a fusion. On selectionne un certain nombre d'equations generalement utilisees et on montre les impossibilites analytiques auxquelles on se heurte alors. 2) On rappelle les possibilites du calcul analogique pour la resolution des systemes differentiels non lineaires et on indique la precision de la methode ainsi que ses limitations. 3) On decrit esolution analogique du probleme statique de la mesure du confinement de la decharge dans le cas stationnaire et l'on compare avec les resultats de l'experience. 4) On decrit la resolution analogique du probleme dynamique de l'evolution du courant de decharge dans un cas simple et l'on compare avec les resultats de l'experience. 5) On decrit la resolution analogique du mouvement des ions isoles dans un champ electromagnetique et l'on decrit le simulateur de champ spatial utilise dans ce probleme (probleme bidimensionnel). 6) On decrit la resolution analogique du probleme precedent dans le cas tridimensionnel pour des geometries particulieres (notamment toroidale) grace a l'emploi simultane de deux simulateurs de champ. 7) On decrit une methode de calcul derivee de la methode de Monte-Carlo, susceptible de s'adapter a l'etude de la dynamique des plasmas et l'on decrit le materiel de commutation-memorisation utilise. 8) Conclusion: On indique la difference profonde que presentent les calculs analogiques pour l'etude des reacteurs a fission et a fusion. On discute notamment la theorie du controle presentee par SCHULTZ en comparant les resultats du calcul linearise a ceux de la simulation non lineaire. (auteur)

Braffort, P.; Chaigne, M. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

1958-07-01

53

San Joaquin-Tulare Conjunctive Use Model: Detailed model description  

Energy Technology Data Exchange (ETDEWEB)

The San Joaquin - Tulare Conjunctive Use Model (SANTUCM) was originally developed for the San Joaquin Valley Drainage Program to evaluate possible scenarios for long-term management of drainage and drainage - related problems in the western San Joaquin Valley of California. A unique aspect of this model is its coupling of a surface water delivery and reservoir operations model with a regional groundwater model. The model also performs salinity balances along the tributaries and along the main stem of the San Joaquin River to allow assessment of compliance with State Water Resources Control Board water quality objectives for the San Joaquin River. This document is a detailed description of the various subroutines, variables and parameters used in the model.

Quinn, N.W.T.

1992-03-01

54

Psychology: University of California at San Diego (UCSD)  

Science.gov (United States)

The Psychology Department at UC San Diego has just posted their Web server. It contains a large list of Psychology related Web servers from around the world plus the research interests of the department.

1997-01-01

55

Remembering San Diego  

International Nuclear Information System (INIS)

After 6 years of existence the ITER EDA project in San Diego, USA, was terminated by desition of the US Congress. This article describes how nice it was for everybody as long as it lasted and how sad it is now

56

SAN PEDRO WATERSHED DATABASE  

Science.gov (United States)

The San Pedro River Geo-Data Browser was jointly developed by the Landscape Ecology Branch of the U.S. Environmental Protection Agency and the U.S. Department of Agriculture, Agricultural Research Service (Tucson, AZ). Since 1995, U.S. Environmental Protection Agency (EP A) and U...

57

San Jose, Costa Rica  

Science.gov (United States)

San Jose, capital city of Costa Rica, fills the valley between two steep mountain ranges. In this image made from data collected by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument on NASA's Terra satellite, visible, shortwave, and near-infrared wavelengths of light that the sensor observed have been combined to produce a false-color version of the scene in which vegetation is red, urban areas are silvery gray, water is dark blue, and clouds are white. The image was captured on February 8, 2007. San Jose is in the center of the image. The Rio Torres winds through downtown San Jose. Cartago, the much smaller colonial capital, sits in the lower right corner, while the city of Alajuela appears across the river, northwest of San Jose. The cities' manmade surfaces contrast sharply with the lushly vegetated landscape surrounding the city. Greenhouses are common in the region, and their glass roofs may be the brilliant white spots around the outer edges the cities. The long, straight runway of the Tobias Bolanos International Airport is visible as a dark line southeast of Alajuela. The landscape around the two cities shown here is rugged. Steep mountain peaks cast dark shadows across their leeward slopes. Patches of dark red vegetation on the mountains north of San Jose may be rainforest. Coffee plantations also cover the slopes of the mountains around the city. February is the dry season in Costa Rica. During the rainy season, from about April to November, clouds usually block the satellite's view of this tropical location. NASA image created by Jesse Allen, using data provided courtesy of Asaf Ullah and Tim Gubbels, SERVIR project.

2007-01-01

58

Perfil local y agroindustria palmera: explorando el caso de San Alberto y San Martín (Cesar) / Profil local et agro-industrie de la palmiculture: exploration du cas de San Alberto et San Martín (Cesar) / Local Profile and Palm Tree Agro-Industry: Exploring the case of San Albert o and San Martin (Cesar)  

Scientific Electronic Library Online (English)

Full Text Available SciELO Colombia | Language: Spanish Abstract in spanish Este artículo establece el perfil municipal de dos localidades en Colombia tradicionalmente palmeras: San Alberto y San Martín (Cesar). En particular, se estudian indicadores socioeconómicos, finanzas públicas y dinámica del conflicto armado en ambos municipios durante los últimos diez años. Se enco [...] ntró que San Alberto, con mayor actividad palmera que San Martín, tiene menores niveles de pobreza y mejores finanzas públicas. Sin embargo, en relación a educación y salud, ambos municipios presentan estándares precarios. En cuanto a seguridad y conflicto armado, se estableció que el número de secuestros y homicidios se redujeron en ambas localidades, pero la población civil sigue siendo víctima de desplazamiento forzado. Abstract in english This article establishes the municipal profile of two places in Colombia which are traditionally known for their palm tree production: San Alberto and San Martin (Cesar). Socioeconomic indicators, public finance, and armed conflict dynamics during the last ten years in both places are studied in par [...] ticular. It was found out that San Alberto, with greater palm tree activity than San Martin, has lower poverty levels and better public finance. Nevertheless, both municipalities show fragile standards in relation to education and health. As for safety and armed conflict, it was determined that the number of kidnappings and murders decreased in both places, but civilians are still victims of forced displacement.

Mónica, Hurtado; Giovanni Andrés, Hernández-Salazar.

2010-07-01

59

Lahar-hazard zonation for San Miguel volcano, El Salvador  

Science.gov (United States)

San Miguel volcano, also known as Chaparrastique, is one of many volcanoes along the volcanic arc in El Salvador. The volcano, located in the eastern part of the country, rises to an altitude of about 2130 meters and towers above the communities of San Miguel, El Transito, San Rafael Oriente, and San Jorge. In addition to the larger communities that surround the volcano, several smaller communities and coffee plantations are located on or around the flanks of the volcano, and the PanAmerican and coastal highways cross the lowermost northern and southern flanks of the volcano. The population density around San Miguel volcano coupled with the proximity of major transportation routes increases the risk that even small volcano-related events, like landslides or eruptions, may have significant impact on people and infrastructure. San Miguel volcano is one of the most active volcanoes in El Salvador; it has erupted at least 29 times since 1699. Historical eruptions of the volcano consisted mainly of relatively quiescent emplacement of lava flows or minor explosions that generated modest tephra falls (erupted fragments of microscopic ash to meter sized blocks that are dispersed into the atmosphere and fall to the ground). Little is known, however, about prehistoric eruptions of the volcano. Chemical analyses of prehistoric lava flows and thin tephra falls from San Miguel volcano indicate that the volcano is composed dominantly of basalt (rock having silica content

Major, J.J.; Schilling, S.P.; Pullinger, C.R.; Escobar, C.D.; Chesner, C.A.; Howell, M.M.

2001-01-01

60

Heidegger y el cristianismo de San Pablo y San Agustín  

Directory of Open Access Journals (Sweden)

Full Text Available Este texto intenta mostrar el sentido de la interpretación de San Pablo y San Agustín que Heidegger lleva a cabo en sus primeros cursos de Friburgo. En concreto, se pretende apuntar al motivo por el que el joven Heidegger recupera aspectos del cristianismo para su proyecto filosófico y cuáles son los elementos concretos que las Epístolas de San Pablo y las Confesiones de San Agustín le aportan. De esta forma, se apreciará, entre otras cosas, la importancia concedida por Heidegger a la acentuación del mundo propio (Selbstwelt y de la temporalidad que es característica de la experiencia cristiana del vivir

Francisco de Lara

2007-01-01

61

Long Period Ground Motions in the San Bernardino Region for Hypothetical San Andreas and San Jacinto Earthquakes  

Science.gov (United States)

The San Bernardino region of southern California is situated on a wedge shaped sedimentary basin bounded to the north by the San Andreas fault and to the south by the San Jacinto fault. Not only is this region fairly heavily populated, but both of these active faults are capable of generating Mw 7+ earthquakes, stressing the need for timely assessment of the ground shaking hazard for future scenario earthquakes. Ground motion estimation in this region is further complicated by the highly variable nature of the subsurface geology. Sediment accumulations are relatively thin in the northern portion of the basin, and then steadily increase in thickness toward the south. The maximum sediment thickness is about 1.5 km just north of the San Jacinto fault, with an abrupt step-up and shallowing of the basement surface along (and to the south of) the San Jacinto fault. Existing observations of long period (T > 1 sec) ground motions for both large (1999 Mw 7.2 Hector Mine) and small (2001 Mw 4.7 Big Bear Lake) earthquakes show significant amplification and extended durations of shaking at recording sites within the basin. Recent studies using 3D numerical simulation methods have modeled these recorded ground motions in order to develop and constrain the 3D velocity structure of the basin region. The current 3D velocity models do reasonably well at matching the recorded waveforms at periods of about 2 seconds and longer. To estimate the expected levels of ground shaking for future events in this region, I have performed 3D finite difference ground motion simulations for hypothetical Mw 7 earthquakes on the San Andreas and San Jacinto faults. The simulations use the existing 3D structural models of the region and incorporate a suite of variable slip finite-fault rupture models. To address uncertainty in the source characterizion, I consider several hypocenter locations and slip distributions on each of the faults. Preliminary results indicate that the largest long period motions occur when the ruptures propagate from the southeast (on either fault) toward and into the basin. Obviously, these rupture scenarios create strong forward directivity effects in the basin region; however, these effects are further amplified by the trapping of energy within the basin sediments. It is possible that this effect may be maximal for the Mw 7 scenarios considered here due to the coincidence of directivity amplification at 2-3 sec period with the strong basin response in this same bandwidth.

Graves, R. W.

2001-12-01

62

Transition de phase quantique de type verrouillage-deverrouillage dans les canaux lineaires coherents des phases en rayures dans les doubles puits quantiques sous champ magnetique perpendiculaire  

Science.gov (United States)

On peut creer un gaz electronique bidimensionnel en utilisant le potentiel de confinement d'une couche mince d'un semiconducteur dans un substrat fait d'une autre semiconducteur de gap plus eleve. L'ajout d'un champ magnetique perpendiculaire au plan de confinement modifie de facon drastique les proprietes du gaz electronique. Pour des densites et des valeurs du champ magnetique adequatement choisies, on obtient un etat fondamental en onde de densite de charge. Dans un systeme compose de deux de ces gaz bidimensionnels suffisamment rapproches l'un de l'autre, on prevoit theoriquement l'existence d'un etat fondamental compose d'une onde de densite de charge dans chacun des puits et d'une serie de regions lineaires ou l'on a une delocalisation coherente des electrons entre les deux puits. Dans cette these, on etudie le comportement a temperature nulle de cet etat fondamental en rayures coherentes. L'etude numerique des modes collectifs de ces phases laisse croire qu'un deverrouillage des canaux coherents est envisageable dans ce systeme. Afin d'etudier cette possibilite, nous construisons d'abord un modele effectif de canaux quasi-unidimensionnels couples qui permettent de reproduire correctement les excitations collectives a basse energie de la phase en rayures coherentes du double puits quantique. Dans un systeme de coordonnees adequatement choisi, ces excitations peuvent etre decrites par des ondes de pseudospin. Les parametres de ce modele effectif simple peuvent etre extraits des calculs des fonctions de reponse realises dans l'approximation Hartree-Fock dependante du temps (appelee aussi Generalized Random Phase Approximation). On constate l'efficacite de ce modele a decrire la dynamique basse energie du systeme pour une certaine plage de distances inter-puits. En retirant de ce modele les contributions a l'hamiltonien provenant des couplages de type Josephson entre les canaux, on obtient alors un systeme ou les canaux sont deverrouilles. Un traitement en groupe de renormalisation perturbatif des couplages Josephson generaux permet alors de conclure si la phase deverrouillee peut etre stable lorsque l'on traite les fluctuations quantiques qui ne sont pas incluses dans l'approximation GRPA. Ces calculs nous permettent de conclure que la phase en rayures coherentes dans les doubles puits quantiques sous champ magnetique perpendiculaire est telle que les canaux coherents demeurent toujours verrouilles et ce, peu importe la valeur de la distance inter-puits. On envisage par contre que l'ajout d'un biais electrostatique pourrait permettre de modifier les proprietes du double puits de facon telle qu'une phase en rayures deverrouillees puisse etre stabilisee par les fluctuations quantiques.

Faribault, Alexandre

63

San Pascual (2009) Año XLVI, n. 351  

OpenAIRE

Editorial. 60 años de nuestra revista San Pascual. D. Casimiro López, Obispo de la diócesis. Espais de llum a vila-real. Golpes de San Pascual. Siguiendo los caminos de San Pascual capítulo XVII. Entrevista Sor María Dolores Pérez Torres Abadesa del monasterio de San Pascual. Manos sacerdotales. Vida en el santuario. Eucaristía y vida. Rincón poético. Peregrinación nacional al sepulcro de San Pascual en 1899 (IV). L'ofrena de flors de les penyes. Milagros de San Pascual (XIII). La S...

Pe?rez, Mari?a Dolores

2009-01-01

64

Brechas intraclásticas (tsunamitas?) en el tope de la Formación San Juan (Darriwiliano), Precordillera de San Juan, Argentina: microfacies y Conodontes / Intraclastic breccias (tsunamites) on the top of San Juan Formation (Darriwillian), San Juan Precordillera, Argentina: microfacies and conodonts  

Scientific Electronic Library Online (English)

Full Text Available SciELO Argentina | Language: Spanish Abstract in spanish Se describen por primera vez niveles de brechas intraclásticas en el último metro de la Formación San Juan, Precordillera Central (San Juan-Argentina). Las características microfaciales, relaciones litofaciales y las variaciones en las poblaciones de conodontes asociadas a las mismas permiten interp [...] retarlas como depósitos producidos por eventos erosivos de gran magnitud que habrían sido generados por tsunamis o tormentas fuera de serie que afectaron la rampa carbonática durante el Darriwiliano medio. Abstract in english This paper describes for the first time intraclastic breccias beds in the last meter of the San Juan Formation, Central Precordillera (San Juan, Argentina). The microfacial features, lithofacial relations and variations in conodont population linked with the conglomerate allow us to defineinterpreti [...] ng that these deposits were produced by a great eroding event, possibly generated by a tsunami or storms out of series which has affected the carbonate ramp during the Middle Darriwilian.

Ana, Mestre.

2011-06-01

65

Modelling SANS and SAXS data  

International Nuclear Information System (INIS)

Full text: Small angle scattering data while on an absolute scale and relatively accurate over large ranges of observables (0.003-1 ; 0.1-1) is often relatively featureless. I will address some of the problems this causes, and some of the ways of minimising these, by reference to our recent SANS results. For the benefit of newer chums this will involve discussion of the strengths and weaknesses of data from ISIS (LOQ), Argonne (SAND) and the I.L.L. (D22), and the consequences these have for modelling. The use of simple portable or remote access systems for modelling will be discussed - in particular the IGOR based NIST system of Dr. S. Kline and the VAX based FISH system of Dr. R. Heenan, ISIS. I will illustrate that a wide variety of physically appealing and complete models are now available. If you have reason to believe in a particular microstructure, this belief can now be either falsified, or the microstructure quantified, by fitting to the entire set of scattering patterns over the entire Q-range. For example, only in cases of drastic ignorance need we use only Guinier and Porod analyses, although these may provide useful initial guidance in the modelling. We now rarely need to use oversimplified logically incomplete models - such as spherical micelles with neglect of intermicellar correlation- now that we possess fast desktop/experimental computers

66

77 FR 59648 - Notice of Inventory Completion: San Francisco State University, NAGPRA Program, San Francisco, CA  

Science.gov (United States)

...construction at the Marin County Civic Center. San Francisco State University...CA-MRN-365 in Marin County, CA, by San Francisco State University...CA-MRN-402 in Marin County, CA, by San Francisco State...

2012-09-28

67

Theoretical and experimental study of a non-linear disintegration process for a langmuir wave; Etude theorique et experimental d'un processus non lineaire de desintegration d'une onde de langmuir  

Energy Technology Data Exchange (ETDEWEB)

Using the Vlasov equation we calculate and discuss non-linear coupling equations between three electronic plasma waves (Langmuir waves) which propagate in a cylindrical plasma column confined by a strong magnetic field. We study, in the experimental device EOS, along the magnetic field, the disintegration of a Langmuir wave excited in the plasma column by means of an antenna. Space structure measurements for various waves show that the resonance conditions (selection rules) are satisfied. The measured disintegration threshold is in agreement with the theoretical value within 30 per cent and shows that this non linear mechanism appears when the oscillating density to the mean density ratio is about 10{sup -3} to 10{sup -2}. The variation of the spatial growth rate as a function of the amplitude of the disintegrated wave shows that the resulting waves are correlated in groups of three along the magnetic field even though the disintegrating spectrum appears in a wide frequency band. (author) [French] A partir de l'equation de Vlasov nous calculons et discutons les equations de couplage non lineaire entre trois ondes plasma electroniques (ou ondes de Langmuir) qui se propagent dans une colonne de plasma cylindrique confinee par un champ magnetique de forte intensite. Nous etudions, dans le dispositif experimental EOS, le long du champ magnetique, la desintegration d'une onde de Langmuir excitee dans la colonne de plasma a l'aide d'une antenne. La mesure de la structure spatiale des differentes ondes montre que l'ensemble des conditions de resonance (ou regles de selection) sont satisfaites. Le seuil de desintegration mesure est en accord avec la valeur theorique a 30 pour cent pres et montre que ce mecanisme non lineaire apparait lorsque le rapport de la densite oscillante a la densite moyenne est de l'ordre de 10{sup -3} a 10{sup -2}. La variation du taux de croissance spatiale en fonction de l'amplitude de l'onde qui se desintegre montre que les ondes restent trois par trois fortement correlees le long du champ magnetique bien que le spectre de desintegration apparaisse dans une large bande de frequences. (auteur)

Perulli, M. [Commissariat a l' Energie Atomique, Fontenay-aux-Roses (France). Centre d' Etudes Nucleaires

1968-07-01

68

San Bernardino County Museum  

Science.gov (United States)

The San Bernardino County Museum is a regional museum with exhibits and collections in cultural and natural history. Special exhibits, the Exploration Station live animal discovery center, extensive research collections, and public programs for adults, families, students, and children are all part of the museum experience. The Museum is surrounded by citrus groves, and orange blossoms perfume the air. The Zimmerman Citrus Kiosk explores citrus agricultural history in Southern California. Death Valley Alive! is a new traveling exhibit, available for rent, where visitors can explore the natural history and culture of the Death Valley region from its geologic beginnings 1.3 billion years ago. Online exhibits include The Importance of Museum Collections, The Barstow Fossil Beds, Motherlode of the Miocene, The Etiwanda Fan, and for kids, Mimicry, a study in camouflage and adaptation. Teacher Resources include professional development and workshops, and Trading Places, where 21 hours of time spent volunteering in the Museum earns a free program for your class. Sample opportunities include writing activities for study kits, developing post-visit activities, creating a museum gallery guide, translating student materials into Spanish, or developing an independent idea. There are programs for youth, Scouts, and adults, as well as various publications available in anthropology, archeology, biology, geology and history.

69

Magnetostratigraphy of the Lower Cretaceous San Marcos Formation, Coahuila, Mexico  

Science.gov (United States)

Continental hematitic strata of the Lower Cretaceous San Marcos Formation, in central Coahuila, were deposited on and along the margins of the Coahuila Island, a prominent paleogeographic element in NE Mexico. It contains the stratigraphic record of activity along the San Marcos fault, the southern margin of the Sabinas basin. It is overlain by marine limestones of the Cupido Formation, and the contact is transitional. It rests on ammonite bearing strata of Tithonian age, but the contact is not well exposed. We sampled the San Marcos Formation at localities in Potrero Colorado and Valle de San Marcos, for a total of 34 paleomagnetic sites in three sections (one site=one bed). The beds dip gently to the north to northwest at all three sections.The characteristic magnetization is a dual-polarity, high coercivity, and high unblocking temperature (>650 °C), northwest directed moderately positive component, overprinted by a north directed magnetization of lower stability. Occasionally, the reverse polarity magnetization (south-southwest to southeast directed) is only revealed by demagnetization trajectories. Dual polarity magnetizations within two sites suggest that the remanence acquisition process is of long duration relative to the duration of reversals. A composite section defines 9 magnetozones, and it is characterized by reversed zones of short duration relative to normal intervals. We thus correlate the magnetic polarity sequence of the San Marcos Formation with the M5 to M0 chron sequence of the Barremian to early Aptian GPTS. Site means are relatively well grouped. Tilt corrected means for each of the sections samples vary from discordant (191.7°, -54.9°; k=40.5, ?95=9.6°; 7 accepted sites) at the base of the section to concordant (333.6°, 58.3°; k=28.3, ?95=12.6°; 7 accepted sites) at the top of the section. The discordance at the base of the section is interpreted in terms of a small clockwise rotation related to activity along the San Marcos fault.

Molina-Garza, R. S.; Arvizu, I.; González, G.

2007-05-01

70

76 FR 10945 - San Luis Trust Bank, FSB, San Luis Obispo, CA; Notice of Appointment of Receiver  

Science.gov (United States)

...TREASURY Office of Thrift Supervision San Luis Trust Bank, FSB, San Luis Obispo...the Office of Thrift Supervision has duly appointed...for San Luis Trust Bank, FSB, San Luis Obispo...the Office of Thrift Supervision. Sandra E....

2011-02-28

71

San Fernando: ¿utopía o proyecto inconcluso? / San Fernando: utopia or unfinished project?  

Scientific Electronic Library Online (English)

Full Text Available SciELO Peru | Language: Spanish Abstract in spanish El estudio analiza los distintos proyectos de modernización ocurridos en la Facultad de Medicina de San Fernando, en el contexto de una seria crisis institucional a finales del siglo XX. Para ello, a partir de las categorías de colectivo de pensamiento y estilo de pensamiento propuestos por Ludwick [...] Fleck, se hace un estudio de los procesos socio-históricos relacionados con los distintas iniciativas desplegadas en la más antigua escuela de medicina del Perú. Un análisis de las diferentes iniciativas identificadas nos llevan a la hipótesis de que la crisis de San Fernando, como colectivo académico, se basa en las contradicciones propias de un proyecto institucional inconcluso, que además cíclicamente se manifiesta asincrónico y disfuncional, al complejo y cambiante entorno institucional y cultural de la sociedad peruana. El estudio sistematiza las principales características de los diferentes proyectos de modernización institucional. Luego de un análisis del actual contexto del sector salud peruano, a partir de los procesos identificados, se propone una agenda de desarrollo, orientada a generar un ciclo de acumulación y crecimiento académico, que constituya una etapa de transición de cara a los retos que el siglo XXI plantea a los miembros del colectivo San Fernandino. Abstract in english The study analyzes the various modernization projects at the Faculty of Medicine San Fernando, in the context of a serious institutional crisis at the end of the XXth century. Beginning from the thinking collective and thinking style categories proposed by Ludwick Fleck, we study the social and hist [...] orical processes related to the different initiatives displayed in the ancient Peruvian school of medicine. Analysis of the different initiatives identified lead us to the hypothesis that San Fernando’s crisis as an academic collective is based in the proper contradictions of an unfinished institutional project that also manifests cyclically asynchronous and dysfunctional to the complex and changing Peruvian society’s institutional and cultural environment. The study systematizes the main characteristics of the different institutional modernization projects. Following an analysis of the current Peruvian health sector context and starting from the processes identified, we propose a development agenda oriented to generate an academic accumulation and growth cycle that constitutes a transition stage in front of the challenges posed by the XXIth century to the San Fernando collective members.

Juan Pablo, Murillo; Gustavo, Franco.

2008-06-01

72

77 FR 46115 - Notice of Inventory Completion: San Diego Museum of Man, San Diego, CA  

Science.gov (United States)

...ADDRESSES: Philip Hoog, San Diego Museum of Man, 1350 El Prado, Balboa Park, San Diego, CA 92101, telephone (619) 239-2001...should contact Philip Hoog, San Diego Museum of Man, 1350 El Prado, Balboa Park, San Diego, CA 92101, telephone (619)...

2012-08-02

73

San Pascual (2009) Año XLVI, n. 350  

OpenAIRE

Editorial. Restauración del patrimonio artístico del santuario basílica de San Pascual. Traducción de la bula de la erección de la cofradía de la inmaculada Concepción. Fundación de la custodia de San Pascual Baylón. Entrevista D. Pascual Sanz Ibañez, presidente de la junta central de semana santa de vila-real. Milagros de San Pascual XII. Vida en el santuario. Rincón poético. Peregrinación nacional al sepulcro de San Pascual en 1899 (III). Dos piezas pertenecientes al cardenal E...

Pe?rez, Mari?a Dolores

2009-01-01

74

Structure of microemulsions by SANS  

International Nuclear Information System (INIS)

Small-angle neutron scattering (SANS) has been used to determine the structure of microemulsions in the system hydrocarbon-water-sodium di-ethylhexylsulfosuccinate (AOT). SANS spectra taken in a deuterated solvent showed a perfect Guinier fit with a radius of gyration of 15A regardless of the amount of AOT from 0.1 to 5% present. By varying the proportions of deuterated and undeuterated solvent to vary the contrast between the micelles and the solvent, it is concluded that the micelles are basically monodispersed spherical aggregations of 22 AOT molecules

75

Relativity  

CERN Document Server

The theory of relativity has become a cornerstone of modern physics. Over the course of time it has been scrutinized in a multitude of experiments and has always been verified with high accuracy. The correctness of this theory can no longer be called into question. Right after its discovery by Albert Einstein in 1905, special relativity was only gradually accepted because it made numerous predictions contradicting common sense, fervently castigated by Einstein, and also defied experiment for too long a time. It was only with the advent of particle or high energy physics that matter could be ac

Brewster, Hilary D

2009-01-01

76

Relativity  

CERN Document Server

Time magazine's ""Man of the Century"", Albert Einstein is the founder of modern physics and his theory of relativity is the most important scientific idea of the modern era. In this short book, Einstein explains, using the minimum of mathematical terms, the basic ideas and principles of the theory that has shaped the world we live in today. Unsurpassed by any subsequent books on relativity, this remains the most popular and useful exposition of Einstein's immense contribution to human knowledge.With a new foreword by Derek Raine.

Einstein, Albert

2013-01-01

77

Radiation accident in San Salvador  

International Nuclear Information System (INIS)

On the base of a radiation accident of tragic consequences which took place in 1989 in San Salvador the author formulates conclusions that are also important for the Polish users of instruments with isotopic sources. Only high qualifications, permanent training and proper exploitation of such instruments would ensure safety of the employees. (author)

78

San Antonio Zoological Gardens & Aquarium  

Science.gov (United States)

Special services for teachers and students include programs for classes and summer camps. A variety of land and aquatic animals are on display; website contains a section on animal training; adopt-an-animal program offered. Free screensaver. Admission fees apply. Located in San Antonio, Texas.

79

Relationalism  

CERN Document Server

This article contributes to the debate of the meaning of relationalism and background independence, which has remained of interest in theoretical physics from Newton versus Leibniz through to foundational issues for today's leading candidate theories of quantum gravity. I contrast and compose the substantially different Leibniz--Mach--Barbour (LMB) and Rovelli--Crane (RC) uses of the word `relational'. Leibniz advocated primary timelessness and Mach that `time is to be abstracted from change'. I consider 3 distinct viewpoints on Machian time: Barbour's, Rovelli's and my own. I provide four expansions on Barbour's taking configuration space to be primary: to (perhaps a weakened notion of) phase space, categorizing, perspecting and propositioning. Categorizing means considering not only object spaces but also the corresponding morphisms and then functors between such pairs. Perspecting means considering the set of subsystem perspectives; this is an arena in which the LMB and Rovelli approaches make contact. By ...

Anderson, Edward

2012-01-01

80

Neogene contraction between the San Andreas fault and the Santa Clara Valley, San Francisco Bay region, California  

Science.gov (United States)

In the southern San Francisco Bay region of California, oblique dextral reverse faults that verge northeastward from the San Andreas fault experienced triggered slip during the 1989 M7.1 Loma Prieta earthquake. The role of these range-front thrusts in the evolution of the San Andreas fault system and the future seismic hazard that they may pose to the urban Santa Clara Valley are poorly understood. Based on recent geologic mapping and geophysical investigations, we propose that the range-front thrust system evolved in conjunction with development of the San Andreas fault system. In the early Miocene, the region was dominated by a system of northwestwardly propagating, basin-bounding, transtensional faults. Beginning as early as middle Miocene time, however, the transtensional faulting was superseded by transpressional NE-stepping thrust and reverse faults of the range-front thrust system. Age constraints on the thrust faults indicate that the locus of contraction has focused on the Monte Vista, Shannon, and Berrocal faults since about 4.8 Ma. Fault slip and fold reconstructions suggest that crustal shortening between the San Andreas fault and the Santa Clara Valley within this time frame is ~21%, amounting to as much as 3.2 km at a rate of 0.6 mm/yr. Rates probably have not remained constant; average rates appear to have been much lower in the past few 100 ka. The distribution of coseismic surface contraction during the Loma Prieta earthquake, active seismicity, late Pleistocene to Holocene fluvial terrace warping, and geodetic data further suggest that the active range-front thrust system includes blind thrusts. Critical unresolved issues include information on the near-surface locations of buried thrusts, the timing of recent thrust earthquake events, and their recurrence in relation to earthquakes on the San Andreas fault.

McLaughlin, R.J.; Langenheim, V.E.; Schmidt, K.M.; Jachens, R.C.; Stanley, R.G.; Jayko, A.S.; McDougall, K.A.; Tinsley, J.C.; Valin, Z.C.

1999-01-01

81

Crustal structure of the coastal and marine San Francisco Bay region, California  

Science.gov (United States)

As of the time of this writing, the San Francisco Bay region is home to about 6.8 million people, ranking fifth among population centers in the United States. Most of these people live on the coastal lands along San Francisco Bay, the Sacramento River delta, and the Pacific coast. The region straddles the tectonic boundary between the Pacific and North American Plates and is crossed by several strands of the San Andreas Fault system. These faults, which are stressed by about 4 cm of relative plate motion each year, pose an obvious seismic hazard. We have many ways to study earthquake faults. Where faults break the land surface, we may learn valuable information needed for hazard assessment, such as cumulative offset, slip rate, and earthquake history. However, many of the major faults in the region are partly submerged beneath San Francisco and Monterey Bays. Although this situation poses problems in gathering observational data for hazard assessment, bay-region waterways provide an opportunity to study faultzone structure by using marine subsurface-imaging techniques, which are easier and cheaper than equivalent studies on land. In 1993, the U.S. Geological Survey (USGS) launched a 5-year project aimed at unearthing the basic science of the submerged San Andreas strike-slip fault system in the San Francisco Bay region with its many interacting strands. Primary project goals were structural, such as to discover how the San Andreas and Hayward Faults are connected or related at depth, to learn how the complex of faults in the San Andreas stepover zone on the Golden Gate platform functions, and to locate previously unknown faults. This volume thus contains mostly structural information about the San Francisco Bay region, much of it gathered through exploratory geophysical experiments. The volume is organized “top down,” from studies in the shallowest crust to the base of the crust. The first three chapters are linked through their use of novel geophysical techniques to study earthquake effects, coseismic slip, and shallow stratigraphy. Kayen and others examine crustal structure at very high resolution and demonstrate the use of ground-penetrating-radar tomography to measure the liquefaction potential of coastal sedimentary deposits. McGann and others use microfossils from drill cores along the San Francisco-Oakland Bay Bridge to determine a more detailed late Pleistocene stratigraphy of San Francisco Bay than was previously available. Geist and Zoback use the historical record of a small local tsunami generated by the great 1906 San Francisco earthquake to model the rupture process of that earthquake. The last four chapters are dedicated to studies of fault related structure of the seismogenic crust in and around the San Andreas Fault system in the San Francisco Bay region. Jachens and others compile an aeromagnetic anomaly map from new high-resolution flights across the bay region. Some of these anomalies mark the positions of offshore faults, and others are offset by faults, providing constraints on cumulative slip. Hart and others concisely summarize the marine seismic data recorded in and around San Francisco Bay, map the coverage, and provide archival information for those interested in acquiring data. The last two chapters present the results of the seismic data that have been analyzed. Bruns and others present their analysis of high-quality intermediate-resolution (~5-km penetration) seismic-reflection data gathered over the complex San Andreas-San Gregorio Fault junction. This junction, which is thought to be where the 1906 San Francisco earthquake originated (see Geist and Zoback, this volume), contains an apparent extensional right stepover in the San Andreas Fault. Finally, Parsons and others review and summarize the results of deep-crustal seismic-reflection experiments and local-earthquake tomographic studies, including previously unpublished data, and provide additional support and discussion for already-published studies. In summary, these studies were carried out in an environment where background infor

Parsons, Tom, (Edited By)

2002-01-01

82

Bancos de cholga Aulacomya atra atra (Molina) (Bivalvia: Mytilidae) del golfo San José (Chubut, Argentina): Diversidad y relaciones con facies afines / Ribbed mussel Aulacomya atra atra (Molina) (Bivalvia: Mytilidae) beds of the San José Gulf (Chubut, Argentina): Diversity and relationships with related facies  

Scientific Electronic Library Online (English)

Full Text Available SciELO Chile | Language: Spanish Abstract in spanish Se estudió la diversidad y relaciones entre diferentes poblamientos de la biocenosis de raspadores-suspensívoros del golfo San José (Chubut, Argentina: 42º20’S; 64º20’W), con énfasis en los bancos de cholga Aulacomya atra atra. Las relaciones entre poblamientos se estudiaron a través de un análisis [...] de correspondencias sin tendencias y las relaciones entre poblamientos y factores ambientales a través de un análisis factorial de correspondencias. Para el estudio de la diversidad se utilizaron los índices de diversidad de Hill (N0, N1 y N2), así como el índice de uniformidad derivado (E=N2/N1). Se analizaron, dentro del contexto de estos poblamientos, las relaciones entre la diversidad observada con la resistencia a los disturbios, la presencia de depredadores y con la sucesión y aumento de la heterogeneidad espacial. Se concluyó que: (1) Los bancos de cholga sobre sustratos duros, en razón de hallarse en sitios protegidos del oleaje producido por vientos locales y con una matriz física fijada firmemente a la roca mantienen una alta riqueza específica y una alta uniformidad. (2) Los poblamientos de fondos blandos de mejillón Mytilus edulis platensis en condiciones de estabilidad, evolucionan hacia bancos mixtos con cholgas lo que implica aumento en la complejidad del sustrato, en la heterogeneidad espacial del banco y en la riqueza específica. Estos bancos mixtos al quedar sujetos a disturbios físicos revertirían el proceso de sucesión. (3) Los bancos de vieira tehuelche Aequipecten tehuelchus son propios de ambientes permanentemente disturbados por movimientos del agua y poseen características de baja uniformidad y baja riqueza específica. Con disturbios intensos e infrecuentes estos bancos son eliminados del sitio que ocupaban, ocasionándose arribazones de las especies desprendidas. (4) Los bancos mixtos de cholga-vieira tehuelche son facies alternativas a los bancos de vieira y tienen lugar en sitios protegidos Abstract in english The relationships between different assemblages of the grazer-suspensivore biocoenosis and their diversities were studied at the San José Gulf (Chubut Province, Argentina: 42º20’S; 64º20’W), with emphasis on the facies of the ribbed mussel Aulacomya atra atra. The ordination analysis of the assembla [...] ges species composition was performed using detrended correspondence analysis and the relationships of the assemblages with the environmental factors were analysed using factorial correspondence analysis. The Hill diversity indices (N0, N1, N2), and the evenness derived index (E=N2/N1) were calculated. It was concluded that: (1) The ribbed mussel beds on hard sustrate have high species richness and high equitability, because the rocks provides firm surfaces for byssal attachment and these beds are usually found in protected localities. (2) The soft bottom assemblages with the mussel Mytilus edulis platensis, under conditions of environmental stability, evolve towards mixed beds with ribbed mussel; this process implies increased sustrate complexity, increased spatial heterogeneity and higher species richness. This successional process can be reverted if the mixed bed are affected by strong physical disturbance which can dislodge the assemblages. (3) Beds of the scallop Aequipecten tehuelchus are found at sites permanently disturbed by waves generated by local winds, they have low equitability and low species richness. When the environmental disturbance is very intense the bed is dislodged and big quantities of individuals are beach stranded. (4) The mixed beds of ribbed mussel and Aequipecten tehuelchus are facies which are alternative to Aequipecten beds and they are found in protected sites

Héctor E, Zaixso.

2004-12-01

83

San Diego Zoo: Panda Page  

Science.gov (United States)

This site is provided by the San Diego Zoo. Visitors may view real time footage of pandas at the zoo with Panda Cam, have their questions answered at the Panda Facts page, or read up on each panda with Panda Profiles. And of course, no one should miss the features devoted to panda Hua Mei, who seems to have spent nearly every minute of her life in front of a camera since her birth at the San Diego Zoo in 1999. Visitors can watch video clips of Hua Mei from her birth onward, or view a slide show that chronicles her progress from a tiny unrecognizable lump to a "curious and precocious cub." The Web site has been recently updated to include a short piece about Hua Mei's third birthday, celebrated in August 2002.

2002-01-01

84

Cuartel San Carlos. Yacimiento veterano  

Directory of Open Access Journals (Sweden)

Full Text Available El Cuartel San Carlos es un monumento histórico nacional (1986 de finales del siglo XVIII (1785-1790, caracterizado por sufrir diversas adversidades en su construcción y soportar los terremotos de 1812 y 1900. En el año 2006, el organismo encargado de su custodia, el Instituto de Patrimonio Cultural del Ministerio de Cultura, ejecutó tres etapas de exploración arqueológica, que abarcaron las áreas Traspatio, Patio Central y las Naves Este y Oeste de la edificación. Este trabajo reseña el análisis de la documentación arqueológica obtenida en el sitio, a partir de la realización de dicho proyecto, denominado EACUSAC (Estudio Arqueológico del Cuartel San Carlos, que representa además, la tercera campaña realizada en el sitio. La importancia de este yacimiento histórico, radica en su participación en los acontecimientos que propiciaron conflictos de poder durante el surgimiento de la República y en los sucesos políticos del siglo XX. De igual manera, se encontró en el sitio una amplia muestra de materiales arqueológicos que reseñan un estilo de vida cotidiana militar, así como las dinámicas sociales internas ocurridas en el San Carlos, como lugar estratégico para la defensa de los diferentes regímenes que atravesó el país, desde la época del imperialismo español hasta nuestros días.

Mariana Flores

2007-01-01

85

Sintered materials studied by SANS  

International Nuclear Information System (INIS)

Complete text of publication follows. The small angle scattering of compacted and sintered single phase materials with open or closed porosity can be described by the two phase model. During sintering, the decrease of pore volume is accompanied with decreasing internal surface measured by SANS [1]. Such investigation can be extended to the field of technically relevant multiphase materials as well, e.g. doped tunsten, SiN ceramics and WC-Co composite made from nano-crystalline powder. The deformation of remaining porosity after sintering can be monitored by 2D anisotropy of SANS distribution as the sintered body is processed through several steps of thermomechanical treatment. The elongation of pores or stable bubbles, e.g. K gas filled bubbles in doped W [2], follows the macroscopic deformation of the body. Heat treatment, however, causes spheroidization with vanishing SANS anisotropy. Our investigation using the isointensity contour map method allows establishing a new description of mechanisms of thermomechanical processing. (author) [1] O. Blaschko, R. Glas, G. Krexner and P. Weinzierl, Physical Review Letters 68 970-973 (1992); [2] O. Horacsek, M. Menyhard and J. Labar, High Temperature Materials and Processes 14 207-213 (1995)

86

San Onofre - the evolution of outage management  

International Nuclear Information System (INIS)

With the addition of units 2 and 3 to San Onofre nuclear station in 1983 and 1984, it became evident that a separate group was needed to manage outages. Despite early establishment of a division to handle outages, it was a difficult journey to make the changes to achieve short outages. Early organizational emphasis was on developing an error-free operating environment and work culture. This is difficult for a relatively large organization at a three-unit site. The work processes and decision styles were designed to be very deliberate with many checks and balances. The organization leadership and accountability were focused in the traditional operations, maintenance, and engineering divisions. Later, our organization emphasis shifted to achieving engineering excellence. With a sound foundation of operating and engineering excellence, our organizational focus has turned to achieving quality outages. This means accomplishing the right work in a shorter duration and having the units run until the next refueling

87

The Changing Geomorphic Template of Native Fish Habitat of the Lower San Rafael River, Utah  

OpenAIRE

The physical template of the aquatic ecosystem of the lower San Rafael River changed drastically during the 20th century. Today, the lower San Rafael River still provides patches of complex habitat for roundtail cnub, Gila robusta robusta, flannel mouth sucker, Catostomus latipinnis, and bluehead sucker, Catostomus discobolus. Early 20th century photos show a wide, laterally unstable channel and a floodplain that is relatively low and was probably frequently inundated by overbank flows. 1938 ...

Dean, David J.; Green, Gentri; Schmidt, John C.

2011-01-01

88

Neutron beam applications - Polymer study and sample environment development for HANARO SANS instrument  

Energy Technology Data Exchange (ETDEWEB)

A new SANS instrument will be installed in HANARO reactor near future and in parallel it is necessary to develop the sample environment facilities. One of the basic items is the equipment to control the sample temperature of cell block with auto-sample changer. It is required to develop a control software for this purpose. In addition, softwares of the aquisition and analysis for SANS instrument must be developed and supplied in order to function properly. PS/PI block copolymer research in NIST will provide the general understanding of SANS instrument and instrument-related valuable informations such as standard sample for SANS and know-hows of the instrument building. The following are the results of this research. a. Construction of sample cell block. b. Software to control the temperature and auto-sample changer. c. Acquisition of the SANS data analysis routine and its modification for HANARO SANS. d. PS/PI block copolymer research in NIST. e. Calibration data of NIST and HANARO SANS for comparison. 39 figs., 2 tabs. (Author)

Kim, Hong Doo [Kyunghee University, Seoul (Korea); Char, Kook Heon [Seoul National University, Seoul (Korea)

2000-04-01

89

Geochemical correlation and 40Ar/39Ar dating of the Kern River ash bed and related tephra layers: Implications for the stratigraphy of petroleum-bearing formations in the San Joaquin Valley, California  

Science.gov (United States)

The Kern River ash (KRA) bed is a prominent tephra layer separating the K and G sands in the upper part of the Kern River Formation, a major petroleum-bearing formation in the southern San Joaquin Valley (SSJV) of California. The minimum age of the Kern River Formation was based on the tentative major-element correlation with the Bishop Tuff, a 0.759??0.002 Ma volcanic tephra layer erupted from the Long Valley Caldera. We report a 6.12??0.05 Ma 40Ar/39Ar date for the KRA, updated major-element correlations, trace-element correlations of the KRA and geochemically similar tephra, and a 6.0??0.2 Ma 40Ar/39Ar age for a tephra layer from the Volcano Hills/Silver Peak eruptive center in Nevada. Both major and trace-element correlations show that despite the similarity to the Bishop Tuff, the KRA correlates most closely with tephra from the Volcano Hills/Silver Peak eruptive center. This geochemical correlation is supported by the radiometric dates which are consistent with a correlation of the KRA to the Volcano Hills/Silver Peak center but not to the Bishop Tuff. The 6.12??0.05 Ma age for the KRA and the 6.0??0.2 Ma age for the tephra layer from the Volcano Hills/Silver Peak eruptive center suggest that the upper age of the Kern River Formation is over 5 Ma older than previously thought. Re-interpreted stratigraphy of the SSJV based on the new, significantly older age for the Kern River Formation opens up new opportunities for petroleum exploration in the SSJV and places better constraints on the tectonostratigraphic development of the SSJV. ?? 2007 Elsevier Ltd and INQUA.

Baron, D.; Negrini, R.M.; Golob, E.M.; Miller, D.; Sarna-Wojcicki, A.; Fleck, R.J.; Hacker, B.; Erendi, A.

2008-01-01

90

“TOTALMENTE DIVERSO”: SAN TOMMASO  

Directory of Open Access Journals (Sweden)

Full Text Available In order to synthesize the exploration of above presented ideas, wesuggest the following conclusions: Pope John Paul II cherished Saint Thomas as representing „that eternal novelty of thinking” which brought us close to the ontic space of knowledge, the dynamic principle of which is Being. The climax of this condition would be the moment of embracing the truth, which would trigger that vital necessity for metaphysics. According to the stated objective ofthe necessary and indispensable ratio between reason and faith, we see that Tomas suggested the vision of the objective, transcendent and universal truth. This fact determined Pope John Paul II to appreciate that “passion” for truth. The man of our time must walk again towards the light of this truth. In this sense, Saint Thomas’ philosophy represents the guide above all. Its philosophic importance, meaning that “it is truly the philosophy of Being, and not the philosophy of a simple epiphany”, confirms its aim to provide a constant answerto many of the problems that concerns the human mind: the problems ofknowledge and Being, the problems of speaking and doing, the problems of the world, and the problems related with Man and God.

IOSIF TAMA?

2011-05-01

91

77 FR 50459 - Pike & San Isabel Resource Advisory Committee  

Science.gov (United States)

...AGRICULTURE Forest Service Pike & San Isabel Resource Advisory Committee AGENCY: Forest...SUMMARY: The Pike & San Isabel Resource Advisory Committee will meet...Supervisor's Office of the Pike & San Isabel National Forests, Cimarron and...

2012-08-21

92

76 FR 27304 - Pike & San Isabel Resource Advisory Committee  

Science.gov (United States)

...AGRICULTURE Forest Service Pike & San Isabel Resource Advisory Committee AGENCY: Forest...SUMMARY: The Pike & San Isabel Resource Advisory Committee will meet...Supervisor's Office of the Pike & San Isabel National Forests, Cimarron and...

2011-05-11

93

78 FR 48646 - Pike & San Isabel Resource Advisory Committee  

Science.gov (United States)

...AGRICULTURE Forest Service Pike & San Isabel Resource Advisory Committee AGENCY: Forest...SUMMARY: The Pike & San Isabel Resource Advisory Committee will meet...Supervisor's Office of the Pike & San Isabel National Forests, Cimarron and...

2013-08-09

94

75 FR 78675 - Pike & San Isabel Resource Advisory Committee  

Science.gov (United States)

...AGRICULTURE Forest Service Pike & San Isabel Resource Advisory Committee AGENCY: Forest...SUMMARY: The Pike & San Isabel Resource Advisory Committee will meet...Supervisor's Office of the Pike & San Isabel National Forests, Cimarron and...

2010-12-16

95

75 FR 65609 - Pike & San Isabel Resource Advisory Committee  

Science.gov (United States)

...AGRICULTURE Forest Service Pike & San Isabel Resource Advisory Committee AGENCY: Forest...SUMMARY: The Pike & San Isabel Resource Advisory Committee will meet...Supervior's Office of the Pike & San Isabel National Forests, Cimarron and...

2010-10-26

96

76 FR 9540 - Pike & San Isabel Resource Advisory Committee  

Science.gov (United States)

...AGRICULTURE Forest Service Pike & San Isabel Resource Advisory Committee AGENCY: Forest...SUMMARY: The Pike & San Isabel Resource Advisory Committee will meet...Supervisor's Office of the Pike & San Isabel National Forests, Cimarron and...

2011-02-18

97

76 FR 30903 - Pike & San Isabel Resource Advisory Committee  

Science.gov (United States)

...AGRICULTURE Forest Service Pike & San Isabel Resource Advisory Committee AGENCY: Forest...SUMMARY: The Pike & San Isabel Resource Advisory Committee will meet...Supervisor's Office of the Pike & San Isabel National Forests, Cimarron and...

2011-05-27

98

76 FR 2331 - Pike & San Isabel Resource Advisory Committee  

Science.gov (United States)

...AGRICULTURE Forest Service Pike & San Isabel Resource Advisory Committee AGENCY: Forest...SUMMARY: The Pike & San Isabel Resource Advisory Committee will meet...Supervisor's Office of the Pike & San Isabel National Forests, Cimarron and...

2011-01-13

99

75 FR 51749 - Pike & San Isabel Resource Advisory Committee  

Science.gov (United States)

...AGRICULTURE Forest Service Pike & San Isabel Resource Advisory Committee AGENCY: Forest...SUMMARY: The Pike & San Isabel Resource Advisory Committee will meet...Supervisor's Office of the Pike & San Isabel National Forests, Cimarron and...

2010-08-23

100

Beneficial Reuse of San Ardo Produced Water  

Energy Technology Data Exchange (ETDEWEB)

This DOE funded study was performed to evaluate the potential for treatment and beneficial reuse of produced water from the San Ardo oilfield in Monterey County, CA. The potential benefits of a successful full-scale implementation of this project include improvements in oil production efficiency and additional recoverable oil reserves as well as the addition of a new reclaimed water resource. The overall project was conducted in two Phases. Phase I identified and evaluated potential end uses for the treated produced water, established treated water quality objectives, reviewed regulations related to treatment, transport, storage and use of the treated produced water, and investigated various water treatment technology options. Phase II involved the construction and operation of a small-scale water treatment pilot facility to evaluate the process's performance on produced water from the San Ardo oilfield. Cost estimates for a potential full-scale facility were also developed. Potential end uses identified for the treated water include (1) agricultural use near the oilfield, (2) use by Monterey County Water Resources Agency (MCWRA) for the Salinas Valley Water Project or Castroville Seawater Intrusion Project, (3) industrial or power plant use in King City, and (4) use for wetlands creation in the Salinas Basin. All of these uses were found to have major obstacles that prevent full-scale implementation. An additional option for potential reuse of the treated produced water was subsequently identified. That option involves using the treated produced water to recharge groundwater in the vicinity of the oil field. The recharge option may avoid the limitations that the other reuse options face. The water treatment pilot process utilized: (1) warm precipitation softening to remove hardness and silica, (2) evaporative cooling to meet downstream temperature limitations and facilitate removal of ammonia, and (3) reverse osmosis (RO) for removal of dissolved salts, boron, and organics. Pilot study results indicate that produced water from the San Ardo oilfield can be treated to meet project water quality goals. Approximately 600 mg/l of caustic and 100 mg/l magnesium dosing were required to meet the hardness and silica goals in the warm softening unit. Approximately 30% of the ammonia was removed in the cooling tower; additional ammonia could be removed by ion exchange or other methods if necessary. A brackish water reverse osmosis membrane was effective in removing total dissolved solids and organics at all pH levels evaluated; however, the boron treatment objective was only achieved at a pH of 10.5 and above.

Robert A. Liske

2006-07-31

101

A summary of the San Francisco tidal wetlands restoration series  

OpenAIRE

The four topical articles of the Tidal Wetlands Restoration Series summarized and synthesized much of what is known about tidal wetlands and tidal wetland restoration in the San Francisco Estuary (hereafter ?Estuary?). Despite a substantial amount of available information, major uncertainties remain. A major uncertainty with regard to fishes is the net benefit of restored tidal wetlands relative to other habitats for native fishes in different regions of the Estuary given the presence of nu...

Brown, Larry R.

2003-01-01

102

Developing solar power programs : San Francisco's experience  

International Nuclear Information System (INIS)

This keynote address discussed an array of solar programs initiated in government-owned buildings in San Francisco. The programs were strongly supported by the city's mayor,and the voting public. Known for its fog and varying microclimates, 11 monitoring stations were set up throughout the city to determine viable locations for the successful application of solar technologies. It was observed that 90 per cent of the available sunshine occurred in the central valley, whereas fog along the Pacific shore was problematic. Seven of the monitoring sites showed excellent results. Relationships with various city departments were described, as well as details of study loads, load profiles, electrical systems, roofs and the structural capabilities of the selected government buildings. There was a focus on developing good relations with the local utility. The Moscone Convention Center was selected for the program's flagship installation, a 675 kW solar project which eventually won the US EPA Green Power Award for 2004 and received high press coverage. Cost of the project was $4.2 million. 825,000 kWh solar electricity was generated, along with 4,500,000 kWh electricity saved annually from efficiency measures, resulting in a net reduction of 5,325,000 kWh. Savings on utilities bills for the center were an estimated $1,078,000. A pipeline of solar projects followed, with installations at a sewage treatment plant and a large recycling depot. A program of smaller sites included libr. A program of smaller sites included libraries, schools and health facilities. Details of plans to apply solar technology to a 500 acre redevelopment site in southeast San Francisco with an aging and inadequate electrical infrastructure were described. A model of efficient solar housing for the development was presented, with details of insulation, windows, heating ventilation and air-conditioning (HVAC), water heating, lighting, appliances and a 1.2 kilowatt solar system. Peak demand reductions were also presented. tabs., figs

103

News from San Antonio Breast Cancer Symposium  

International Nuclear Information System (INIS)

On 4 to 8 December 2012 in San Antonio held the 35th annual meeting SABCS - San Antonio Breast Cancer Symposium. Like every year, and now were present thousands of oncologists from around the world to hear the latest results of clinical studies, the new findings of experimental oncology and translational research. (author)

104

San Pascual (1994) Año XXXII n. 302  

OpenAIRE

Editorial. Los golpes de San Pascual. Oidos sordos. Opinión- La repercusión de los golpes. Comentario- Los opusculos de San Pascual. La familia- Hogar cristiano- La familia en el catecismo- XX Congreso Internacional de la Familia- Conclusiones del XX Congreso- Escuela de valores- Vida en el santuario. A l'ombra del claustre.

Pe?rez, Mari?a Dolores

1994-01-01

105

San Diego's High School Dropout Crisis  

Science.gov (United States)

This article highlights San Diego's dropout problem and how much it's costing the city and the state. Most San Diegans do not realize the enormous impact high school dropouts on their city. The California Dropout Research Project, located at the University of California at Santa Barbara, has estimated the lifetime cost of one class or cohort of…

Wilson, James C.

2012-01-01

106

San Pascual (1995) Año XXXIII n. 307  

OpenAIRE

Editorial. Obras- las obras del templo. Beatificación- Beato José Pascual. In memoriam- El Dr. Pont y Gol, un obispo para la historia. Opinión de madrid a San Pascual. San Francisco de Asis- Cronología- Francisco de Asis o el evangelio sin glosa- Cantico de las criaturas. Vida en el santuario- peregrinación de Biar (alicante)- Las hijas del rosario. A l'ombra del claustre.

Pe?rez, Mari?a Dolores

1995-01-01

107

Minería, conflicto y mediadores locales: Minera San Xavier en Cerro de San Pedro, México Mineira, conflito e mediadores locais: Minera San Xavier em Cerro de San Pedro Mining, conflict and local brokers: Minera San Xavier in Cerro de San Pedro  

Directory of Open Access Journals (Sweden)

Full Text Available Este trabajo indaga en las instancias de mediación que intervienen en la articulación de procesos económicos de gran escala y su puesta en práctica local. Basándonos en el conflicto que se produjo en el Municipio de Cerro de San Pedro (San Luis Potosí, México entre la empresa Minera San Xavier y el Frente Amplio Opositor (FAO a la misma, aplicamos el método etnográfico con el objetivo de describir las estructuras locales de mediación política y analizar sus prácticas y racionalidad. Intentamos demostrar así la importancia de los factores políticos locales en las vinculaciones entre estado, empresa y población.Este trabalho indaga nas instâncias de mediação que intervêm em processos econômicos de grande escala e sua posta em prática local. Baseando-nos no conflito no Cerro de San Pedro (San Luis Potosí, México entre a empresa Minera San Xavier e a Frente Amplio Opositor (FAO aplicamos o método etnográfico pra descrever as estruturas de mediação política locais e analisar suas práticas e racionalidade. Tenta-se demonstrar assim a importância dos fatores políticos locais nas vinculações entre estado, empresa e população.This paper investigates in instances of mediation involved in large-scale economic processes and local implementation. Analyzing the conflict in Cerro de San Pedro (San Luis Potosí, México among San Xavier mining company and the Frente Amplio Opositor (FAO, it applies an ethnographic approach to describe the local structures of political mediation and its practices and rationality. The work shows the relevance of local factors in the relationships between State, company and people.

Hernán Horacio Schiaffini

2011-12-01

108

San Diego Natural History Museum  

Science.gov (United States)

The San Diego Natural History Museum traces its roots to a group of amateur naturalists, who formed the San Diego Society of Natural History in 1874. Today the Museum strives to help visitors interpret the natural world through research, education and exhibits. Active research in scientific field work and systematics has been ongoing since the Societies inception, and current fields of interest include Entomology, Botany, Geology, Mineralogy, Paleontology, and Birds and Mammals. The Museum offers an online specimen database, as well as information on publications, collections care and conservation, symposia and workshops and bi-national expeditions. There are a number of changing exhibits at the facility, and one can bring nature into your classroom, art studio, and home by becoming a member of the Museum's Loan Program. The program has over 1100 specimens that represent biologic and geologic diversity throughout the world. The Museums program Proyecto Bio-regional de Educación Ambiental, or PROBEA, designs innovative environmental education curricula to train educators, and engage teachers, students and others in projects to benefit their local environment.

109

Structural model of the San Bernardino basin, California, from analysis of gravity, aeromagnetic, and seismicity data  

Science.gov (United States)

The San Bernardino basin is an area of Quaternary extension between the San Jacinto and San Andreas Fault zones in southern California. New gravity data are combined with aeromagnetic data to produce two- and three-dimensional models of the basin floor. These models are used to identify specific faults that have normal displacements. In addition, aeromagnetic maps of the basin constrain strike-slip offset on many faults. Relocated seismicity, focal mechanisms, and a seismic reflection profile for the basin area support interpretations of the gravity and magnetic anomalies. The shape of the basin revealed by our interpretations is different from past interpretations, broadening its areal extent while confining the deepest parts to an area along the modern San Jacinto fault, west of the city of San Bernardino. Through these geophysical observations and related geologic information, we propose a model for the development of the basin. The San Jacinto fault-related strike-slip displacements started on fault strands in the basin having a stepping geometry thus forming a pull-apart graben, and finally cut through the graben in a simpler, bending geometry. In this model, the San Bernardino strand of the San Andreas Fault has little influence on the formation of the basin. The deep, central part of the basin resembles classic pull-apart structures and our model describes a high level of detail for this structure that can be compared to other pull-apart structures as well as analog and numerical models in order to better understand timing and kinematics of pull-apart basin formation. Copyright 2004 by the American Geophysical Union.

Anderson, M.; Matti, J.; Jachens, R.

2004-01-01

110

Comportamiento de los defectos congénitos en San Luis / Behavior of congenital defects in San Luis municipality  

Scientific Electronic Library Online (English)

Full Text Available SciELO Cuba | Language: Spanish Abstract in spanish Introducción: Con el perfeccionamiento de los cuidados obstétricos y neonatales, los defectos congénitos al nacer han condicionado a un aumento relativo en la morbimortalidad infantil a nivel mundial. Objetivo: Evaluar la incidencia de malformaciones congénitas en el municipio San Luis en el periodo [...] 2000-2009, así como clasificarlas según aparatos o sistemas, precisando la efectividad del diagnóstico prenatal, la decisión tomada por la pareja una vez diagnosticada y su repercusión sobre la mortalidad infantil. Material y método: Se realizó un estudio retrospectivo y descriptivo de los defectos congénitos diagnosticados prenatalmente y después del nacimiento pertenecientes al policlínico "Epifanio Rojas Gil" del municipio San Luis en el período 2000-2009, utilizando los libros de registro de diagnóstico prenatal ubicados en el servicio de genética y se enriqueció con los casos evaluados en consulta de genética clínica. Resultados: La incidencia de defectos congénitos disminuyó en el segundo quinquenio, con un mejor control y seguimiento de las mujeres en edad fértil y gestantes. La mayoría de los defectos fueron diagnosticados prenatalmente (60%) siendo el ultrasonido y el alfafeto proteína medios diagnósticos muy efectivos principalmente en los últimos cinco años. Las malformaciones cardiovasculares, y los defectos de cierre del tubo neural resultaron las más frecuentes. La tasa de mortalidad infantil debida a defectos congénitos fue baja, siendo el año 2003 el de mayor incidencia con un predominio del sistema cardiovascular, no reportándose en el último quinquenio. Conclusiones: La descentralización de los servicios permitió una mejor prevención, diagnóstico precoz y supervivencia de los recién nacidos con defecto congénito en el municipio. Abstract in english Introduction: With the advances of obstetric and neonatal care, congenital defects at birth have led to a relative increase in child morbidity and mortality all over the world. Objectives: to assess the incidence of congenital malformations in San Luis municipality during 2000-2009 and to classify t [...] hem regarding the systems or apparatus affected, to precise the effectiveness of prenatal diagnosis, the decision making of the couple after the diagnosis and repercussion on infant mortality. Material and method: a retrospective and descriptive study about the congenital defects diagnosed during prenatal periods and after birth at “Epifanio Rojas Gil” polyclinic in San Luis municipality; that was carried out throughout 2000-2009 using the records of prenatal diagnosis in the genetic services, which enriched the analysis of the cases assessed in the clinical genetic office. Results: the incidence of congenital defects diminished during the second five-year period, showing a much better control and follow-up of women in fertile ages and pregnant women. The majority of the defects were prenatally diagnosed (60%) where ultrasound along with alpha fetoprotein [AFP] analysis were the most effective diagnosis means, mainly during the last five years. Cardiovascular malformations and neural tube defect closure were the most frequent. The rate of infant mortality related to congenital defects was low, however 2003 showed the greatest incidence, prevailing the defects in cardiovascular system, no cases were reported during the last five-year period. Conclusions: decentralization of genetic services allowed improvements in prevention, early diagnosis and survival of newborn carrying congenital defects in San Luis municipality.

Hernán, Pereda Chávez; Francisco, Delgado Aguiar; María del Carmen, Morejón; Yesenia, Pérez Expósito; Ledys Mabel, Hernández Fernández.

2012-08-01

111

Comportamiento de los defectos congénitos en San Luis Behavior of congenital defects in San Luis municipality  

Directory of Open Access Journals (Sweden)

Full Text Available Introducción: Con el perfeccionamiento de los cuidados obstétricos y neonatales, los defectos congénitos al nacer han condicionado a un aumento relativo en la morbimortalidad infantil a nivel mundial. Objetivo: Evaluar la incidencia de malformaciones congénitas en el municipio San Luis en el periodo 2000-2009, así como clasificarlas según aparatos o sistemas, precisando la efectividad del diagnóstico prenatal, la decisión tomada por la pareja una vez diagnosticada y su repercusión sobre la mortalidad infantil. Material y método: Se realizó un estudio retrospectivo y descriptivo de los defectos congénitos diagnosticados prenatalmente y después del nacimiento pertenecientes al policlínico "Epifanio Rojas Gil" del municipio San Luis en el período 2000-2009, utilizando los libros de registro de diagnóstico prenatal ubicados en el servicio de genética y se enriqueció con los casos evaluados en consulta de genética clínica. Resultados: La incidencia de defectos congénitos disminuyó en el segundo quinquenio, con un mejor control y seguimiento de las mujeres en edad fértil y gestantes. La mayoría de los defectos fueron diagnosticados prenatalmente (60% siendo el ultrasonido y el alfafeto proteína medios diagnósticos muy efectivos principalmente en los últimos cinco años. Las malformaciones cardiovasculares, y los defectos de cierre del tubo neural resultaron las más frecuentes. La tasa de mortalidad infantil debida a defectos congénitos fue baja, siendo el año 2003 el de mayor incidencia con un predominio del sistema cardiovascular, no reportándose en el último quinquenio. Conclusiones: La descentralización de los servicios permitió una mejor prevención, diagnóstico precoz y supervivencia de los recién nacidos con defecto congénito en el municipio.Introduction: With the advances of obstetric and neonatal care, congenital defects at birth have led to a relative increase in child morbidity and mortality all over the world. Objectives: to assess the incidence of congenital malformations in San Luis municipality during 2000-2009 and to classify them regarding the systems or apparatus affected, to precise the effectiveness of prenatal diagnosis, the decision making of the couple after the diagnosis and repercussion on infant mortality. Material and method: a retrospective and descriptive study about the congenital defects diagnosed during prenatal periods and after birth at “Epifanio Rojas Gil” polyclinic in San Luis municipality; that was carried out throughout 2000-2009 using the records of prenatal diagnosis in the genetic services, which enriched the analysis of the cases assessed in the clinical genetic office. Results: the incidence of congenital defects diminished during the second five-year period, showing a much better control and follow-up of women in fertile ages and pregnant women. The majority of the defects were prenatally diagnosed (60% where ultrasound along with alpha fetoprotein [AFP] analysis were the most effective diagnosis means, mainly during the last five years. Cardiovascular malformations and neural tube defect closure were the most frequent. The rate of infant mortality related to congenital defects was low, however 2003 showed the greatest incidence, prevailing the defects in cardiovascular system, no cases were reported during the last five-year period. Conclusions: decentralization of genetic services allowed improvements in prevention, early diagnosis and survival of newborn carrying congenital defects in San Luis municipality.

Hernán Pereda Chávez

2012-08-01

112

Free treatment, rapid malaria diagnostic tests and malaria village workers can hasten progress toward achieving the malaria related millennium development goals: the Médecins Sans Frontières experience from Chad, Sierra-Leone and Mali  

OpenAIRE

Halving the burden of malaria by 2015 and ensuring that 80% of people with malaria receive treatment is among the health related targets of the Millennium Development Goals (MDGs). Despite political momentum toward achieving this target, progress is slow and many with malaria (particularly in poor and rural communities in Africa) are still without access to effective treatment. Finding ways to improve access to anti-malarial treatment in Africa is essential to achieve the malaria related and ...

Nadine de Lamotte; Rony Zachariah; Mit Philips; Frederique Ponsar; Katie Tayler-Smith; Alice Kociejowski; Seco Gerard

2011-01-01

113

Vabariigi aastapäev San Franciscos / Heino Valvur ; foto: Heino Valvur  

Index Scriptorium Estoniae

veebruarikuu möödus San Franciscos Eesti Vabariigi 88. aastapäeva pühitsedes: traditsiooniliselt tähistas aastapäeva San Francisco Seenioride Klubi koosviibimisega, E.E.L.K. San Francisco koguduses peeti jumalateenistus ja koosviibimine, kus noored esitasid rahvalaule, San Francisco Eesti Selts tähistas aastapäeva 25. veebruaril aktuse ja koosviibimisega

Valvur, Heino

2006-01-01

114

Moving Towards SAN Storage: An Enterprise Perspective  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract – One of the major components of any enterprise IT infrastructure is data storage. There has been continuous effort to explore new storage technologies to improve performance with respect to input/output operations, data availability, consolidation of storage assets and data protection and archiving. Storage has moved from the traditional Direct Attached Storage (DAS to Network Attached Storage (NAS and now to Storage Area Networks (SAN. Traditional storage subsystems like Server Attached Storage (SAS and Network Attached Storage (NAS use disks directly attached to servers over a Small Computer Systems Interface (SCSI bus. However, these have limited capabilities keeping in view the rapidly expanding storage needs. The SAN technology holds great promises to be used for enterprises where issues like data availability, serviceability, consolidation of storage and reliability are major concerns. It can provide high speed data transfer with many other storage services, backboned with a high speed Fibre Channel (FC. Storage-area networks are also more popular and efficient way of building large storage systems both in an enterprise environment and for multi-domain storage service providers. SAN design and implementation requires careful analysis before SAN can be used as an enterprise storage solution. In this paper we provide an overview of SAN technology from the view point of building large storage systems in an enterprise environment. We also discuss on return on investment (ROI which can justify the adoption of SAN in an enterprise. Further, it compares two specific technologies, namely, FC SAN and IP SAN. In the sequel different design considerations are made to recommend suitable SAN implementations in order to meet the requirements of any enterprise.

rabi prasad padhy

2012-08-01

115

San Francisco Aerial Photographs 1938  

Science.gov (United States)

Have you ever wanted to fly over San Francisco in the year 1938? Well, now you can in a manner of speaking. Recently, the David Rumsey Historical Map Collection website digitized 164 large format, black and white, vertical aerial photographs taken by Harrison Ryker, a pioneer in aerial photography. The photos are quite remarkable, and visitors can zoom in to see such details as the paint striping on a basketball court. Visitors can peer out over the Ferry Terminal Building, the long-gone Mission Bay Roundhouse, and Hunters Point. The site also contains a detailed biographical sketch of Harrison Ryker, complete with a few of the advertisements for his own products, like the M-11 Stereoscope. Finally, visitors can also save specific images for future references.

116

Gravity Field Variations Associated with the Buried Geological Structures: San Marcos Fault (NE Mexico Case Study  

Directory of Open Access Journals (Sweden)

Full Text Available Gravity data are sensitive to local vertical offsets across high-angle faults, where rocks with different densities are juxtaposed. Yet high densities in some Mesozoic sedimentary rocks just above the basement may smear out the subtle gravity signatures of basement faults. At this study the gravity data processing tends to avoid ill-described “black-box” techniques. The study area is situated in the Palomas site, Cuatrociénegas region, Coahuila, NE Mexico. The San Marcos Fault is at least 300 km long and has WNW-ESE trend from the central part of Nuevo León State through Coahuila, and finally to the eastern part of Chihuahua State. Gravimetric data shows that the lowest values of free air and Bouguer anomalies are in the southern part of the area, and the highest values are in the western and central part of the area. Between these parts exists a zone of high horizontal gravity gradient. Configuration of linear elements of gravity field (gradient zones delimited the San Marcos Fault in the San Marcos valley below thickness of recent sedimentary cover. Two density models were carried out, which showed that the Cretaceous rocks are in discordant contact with the Paleo- zoic rocks that can be related to the San Marcos Fault. The density was determinate using to Nettleton’s method, which results highlight the presence of the San Marcos Fault. Density models showed that the Quaternary sediments are in direct contact with the San Marcos Fault.

Vsevolod Yutsis

2012-09-01

117

Miocene and Pleistocene mollusks from San Andres Island (Caribbean Sea, Colombia) and Paleogeographic considerations  

International Nuclear Information System (INIS)

San Andres Island is the largest emerged portion of the oceanic archipelago of San Andres and Providencia, southwestern Caribbean Sea; it originated as a coralline atoll during Miocene times. The central and highest part of the island consists of a calcareous crest, the San Andres Formation, formed by Neogene lagoonal and reefal deposits. This crest is surrounded by a calcareous platform of Pleistocene age (San Luis Formation) which emerges only along the island coast, whereas its most part is submerged and covered by a Recent reef complex. Fossil material of molluscs from these two formations was collected in various sites throughout the island and taxonomically identified. In the four sites sampled in the San Andres Formation, material belonging to 19 gastropod and 37 bivalve species was obtained, most of them relatively well represented in other geologic formations of the Caribbean region that are stratigraphically situated between the upper Miocene and the middle Pliocene. Some elements occurring in this formation, such as Ostrea haitiensis, Meretrix dariena and Siphocypraea henekeni, were widely distributed in the Caribbean Miocene Province. In the San Luis Formation, material belonging to 18 gastropod and 11 bivalve species was obtained, most of them also represented in the Recent molluscan fauna of the region. The estimated age of this formation is Sangamonian, hence corresponding to similar formations occurring in Grand Cayman, Jamaica, Hispaniola, the Netherld Cayman, Jamaica, Hispaniola, the Netherlands Antilles and other Caribbean islands, with which it also shows a great similarity in the composition of the molluscan fauna.

118

SANS studies of micellar and magnetic fluids  

International Nuclear Information System (INIS)

Small-angle neutron scattering (SANS) has proved to be an excellent technique for the study of complex fluids. This article introduces SANS from the viewpoint of such studies. The use of SANS to determine the structures of concentrated micellar fluids is then discussed within the framework of current one-component macrofluid (OCM) models, and experimental examples are taken from several contemporary studies. Finally, the discussion is extended to magnetic fluids (ferrofluids) in which the neutron magnetic interaction plays an important experimental role. 25 refs., 11 figs., 1 tab

119

33 CFR 110.224 - San Francisco Bay, San Pablo Bay, Carquinez Strait, Suisun Bay, Sacramento River, San Joaquin...  

Science.gov (United States)

... In San Francisco Bay east of the city of San Francisco a circular area having...27.5? W. A 667-yard-wide forbidden anchorage zone surrounds this anchorage...27?27? W. A 667-yard-wide forbidden anchorage zone surrounds this anchorage...tangents joining the semicircles. A forbidden anchorage zone extends 667 yards out...thence to the shore at the Benicia City......

2010-07-01

120

HISTORICAL ECOTOXICOLOGICALASSESSMENT OF SAN JUAN ECOSYSTEM, SANTIAGO DE CUBA, CUBA  

Directory of Open Access Journals (Sweden)

Full Text Available Currently, the environmental decision-making related to watershed preservation is oriented under the precepts of an historical environmental assessment. The objective of this research was to conduct a historical ecotoxicological assessment of the San Juan de Santiago de Cuba ecosystem. This was considered a systematic environmental monitoring which ran from 2010 to 2013, made q?uarterly. Physicochemical parameters such as electrical conductivity, total alkalinity, total hardness, pH, total solids, dissolved oxygen, biochemical oxygen demand and chemical oxygen demand were determined. All parameters of environmental risk prediction were performed using the GECOTOX program. The concentrations of Cu, Zn, Pb and Cd on three target organs (brain, gills and liver in the biomonitor adult Gambusia punctata (Poecilidae were analyzed. In this species, the effect of total protein and enzymatic activity of acetylcholinesterase as biomarkers were evaluated. In general, the parameters were outside the values set used by the Cuban quality standards. The GECOTOX program said that the waters of the San Juan ecosystem presented a high rate of risk. The highest concentrations of metals were determined in the gills, liver and brain, respectively. Biomarker values w? ere high, being higher for females. Finally, it was concluded that from one year to another all responses were ascending; thus, the San Juan ecosystem presented ecotoxicological effects in time.

Argota, George

2013-07-01

121

SANS Study of Static Structure of The Double Network Polymers  

Science.gov (United States)

The freeze-dried double-network hydrogels (DN-polymers) have cross-linked aqueous polymer networks giving unique mechanical properties [1]. The Young's modulus of the DN-polymers is nearly unchanged around 102 MPa in the relative humidity (RH) between 0 and 80%. The DN-polymers also show maximum values in both Young's modulus and fracture stress around 30% RH, which corresponds to the water content of about 7 wt.%, in contrast with the plastics for which tinny amount of water causes significant decrease of mechanical properties. Small-angle neutron scattering (SANS) measurements were carried out to investigate the humidity dependence of the nanoscaled structure of the DN-polymers. Several SANS profiles obtained for un-deformed DN-polymers made of poly- (2-acrylamido-2-methylpropane sulfonic acid) sodium salt (PNaAMPS) and polyacrylamide (PAAm) are compared with each other. The SANS results show that water is adsorbed on the structure larger than a mesh-size of the polymer network at low RH but is adsorbed gradually also on the structure in a scale of the segment of the polymer with increasing RH.

Tominaga, Taiki; Takata, Shin-ichi; Suzuki, Jun-ichi; Aizawa, Kazuya; Seto, Hideki; Arai, Masatoshi

122

The performance of magnetic lens for focusing VCN-SANS  

Energy Technology Data Exchange (ETDEWEB)

We have developed a prototype rotating-permanent magnet sextupole lens (named rot-PMSx) for more efficient experiments with neutron beams in time of flight (ToF) mode. This lens can modulate the focusing strength over range 1.5x10{sup 4}T/m{sup 2{<=}}g'{<=}5.9x10{sup 4}T/m{sup 2}. Synchronization between the modulation and the beam pulse produces a focused beam without significant chromatic aberration. We anticipate that this lens could be utilized in focusing small angle neutron scattering (SANS) instruments for novel approach to high resolution SANS. We carried out experiments testing the principle of this lens at the very cold neutron (VCN) beamline (PF2) at Institut Laue-Langevin (ILL), France. The focused beam image size at the detector was kept constant at the same beam size as the source ({approx}3mm) over a wavelength range of 30A{<=}{lambda}{<=}48A in focal length of {approx}1.14m. The flux gain was about 12 relative to a beam without focusing, and the depth of focus was quite large. These results show the good performance of this lens and the system. Thereupon we have demonstrated the performance of this test bed for high resolution focusing of VCN-SANS for a well-studied softmatter sample; a deuterium oxide solution of Pluronic F127, an (PEO){sub 100}(PPO){sub 65}(PEO){sub 100} tri-block copolymer in deuterium oxide. The results of the focusing experiment and the focusing VCN-SANS are presented.

Yamada, M., E-mail: yamada@kyticr.kuicr.kyoto-u.ac.j [ICR, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan); Iwashita, Y.; Kanaya, T.; Ichikawa, M.; Tongu, H. [ICR, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan); Kennedy, S.J. [Bragg Institute, ANSTO, PMB 1, Lucas Heights, NSW 2234 (Australia); Shimizu, H.M.; Mishima, K.; Yamada, N.L. [KEK, 1-1, Oho, Tsukuba, Ibaraki 305-0801 (Japan); Hirota, K. [RIKEN, 2-1, Hirosawa, Wako, Saitama 351-0198 (Japan); Carpenter, J.M.; Lal, J. [Argonne National Laboratory, IL 60439 (United States); Andersen, K.; Geltenbort, P.; Guerard, B.; Manzin, G. [ILL, 6 Rue Jules Horowitz, B.P.156, F-38042 Grenoble Cedex 9 (France); Hino, M.; Kitaguchi, M. [KURRI, 2-1010, Kumatori, Osaka 590-0494 (Japan); Bleuel, M. [Reactor institut Delft TU Delft, Mekelweg 15, 2629 JB Delft (Netherlands)

2011-04-01

123

The performance of magnetic lens for focusing VCN-SANS.  

Energy Technology Data Exchange (ETDEWEB)

We have developed a prototype rotating-permanent magnet sextupole lens (named rot-PMSx) for more efficient experiments with neutron beams in time of flight (ToF) mode. This lens can modulate the focusing strength over range 1.5 x 10{sup 4} T/m{sup 2} {le} g' {le} 5.9 x 10{sup 4} T/m{sup 2}. Synchronization between the modulation and the beam pulse produces a focused beam without significant chromatic aberration. We anticipate that this lens could be utilized in focusing small angle neutron scattering (SANS) instruments for novel approach to high resolution SANS. We carried out experiments testing the principle of this lens at the very cold neutron (VCN) beamline (PF2) at Institut Laue-Langevin (ILL), France. The focused beam image size at the detector was kept constant at the same beam size as the source ({approx} 3 mm) over a wavelength range of 30 {angstrom} {le} {lambda} {le} 48 {angstrom} in focal length of {approx} 1.14 m. The flux gain was about 12 relative to a beam without focusing, and the depth of focus was quite large. These results show the good performance of this lens and the system. Thereupon we have demonstrated the performance of this test bed for high resolution focusing of VCN-SANS for a well-studied softmatter sample; a deuterium oxide solution of Pluronic F127, an (PEO){sub 100}(PPO){sub 65}(PEO){sub 100} tri-block copolymer in deuterium oxide. The results of the focusing experiment and the focusing VCN-SANS are presented.

Yamada, M.; Iwashita, Y.; Kanaya, T.; Ichikawa, M.; Tongu, H.; Kennedy, S. J.; Shimizu, H. M.; Mishima, K.; Yamada, N. L.; Hirota, K.; Carpenter, J..; Lal, J.; Anderson, K.; Geltenbort, P.; Guerard, B.; Manzin, G.; Hino, M.; Kitaguchi, M.; Bleuel, M.; NOP Collaboration (Biosciences Division); ( AES); ( MSD); (Kyoto Univ.); (Bragg Inst.); (KEK, 1-1); (RIKEN, 2-1, Hirosawa, Wako); (ILL); (KURRI); (Reactor Inst.)

2011-01-01

124

Representaciones, actitudes y prácticas respecto a la Leishmaniasis Cutánea en la población del Cantón de Acosta, provincia de San José, Costa Rica: estudio antropológico exploratório Representation, attitudes, and practices related to Cutaneous Leishmaniasis in people from Acosta Country, San Jose province, Costa Rica: an exploratory anthropological astudy  

Directory of Open Access Journals (Sweden)

Full Text Available Estudio antropológico exploratorio sobre las representaciones, actitudes y prácticas relacionadas con la Leishmaniasis Cutánea (LC en la población rural del cantón de Acosta, Costa Rica, dirigido a estimar la posibilidad de aplicación de medidas de control propuestas sobre una base epidemiológica. Entrevistas abiertas con una pequeña muestra de personas, provenientes tanto de casas-caso como de casas-control proveyeron la base para un Análisis Proposicional del Discurso (APD. Los resultados son que la gente de Acosta considera la LC como una entidad nosológica diferenciada, pero se interesan sobre todo en sus manifestaciones clínicas en los niños (que son los más afectados, así como en su propia capacidad de acción mediante remedios populares. La idea de medidas de control sobre los reservorios, los vectores o el contexto espacio-temporal del contacto no asoma espontáneamente en el pensamiento de la gente. Sin embargo, la LC se percibe como una disrupción en el espacio doméstico y peridoméstico, considerado seguro; medidas de control que intervengan en ese ámbito podrían pues tener buenas posibilidades de éxito.An exploratory anthropological study on representations, attitudes, and practices related to Cutaneous Leishmaniasis (CL among the rural population of Acosta Vountry, Costa Rica, aimed to estimate the applicability of epidemiologically-based control measures. Open interviews with a small sample of individuals from both case and control households provided the basic for a Propositional Discourse Analysis (PDA. Results are that Acosta people consider CL a distinct nosologic entity, but they are mainly interested in its clinical manifestations in children (who are mainly affected, as well as in their own capacity to act on the disease using folk remedies. The idea of control measures on reservoirs, on vectors, or on the spatial and temporal context of contact does not arise spontaneously in people's thinking. Nevertheless, CL is perceived as a disruption in the safe domiciliary and peridomiciliary space, so that control measures intervening there could have a chance for success.

Alvaro Dobles-Ulloa

1994-06-01

125

Trace elements in Corbicula fluminea from the San Joaquin River, California.  

Science.gov (United States)

(i) Trace element concentrations in soft tissue of the benthic bivalve, Corbicula fluminea, from the San Joaquin River and its major tributaries were examined during the primary irrigation season in relation to the spatial variation in concentrations of major, minor and trace constituents in riverwater and sediments. (ii) Selenium concentrations in Corbicula from perennial flow reaches of the San Joaquin River and its major tributaries varied directly with the solute (less than or equal to 0.45 microns) Se concentrations of riverwater. Elevated concentrations occurred in clams from sites with substantial discharge originating as subsurface drainage and irrigation return flows. Both tissue and solute Se concentrations declined from June through the end of the primary irrigation season. (iii) Arsenic concentrations in Corbicula from perennial flow reaches of the San Joaquin River varied directly with the HNO3-extractable (pH 2) As:Fe ratio of suspended matter, providing evidence that sorption to oxyhydroxide surfaces is an important control on the biological availability of As. However, Corbicula from several tributaries draining alluvium derived from the Sierra Nevada had lower As concentrations than would be predicted by the relation developed for perennial flow sites of the San Joaquin River. Arsenic concentrations in Corbicula from the Tuolumne and Merced Rivers and upstream reaches of the San Joaquin River were higher than in clams from the downstream perennial flow reaches of the San Joaquin River. Concentrations of As in clams from downstream perennial flow reaches of the San Joaquin River increased from June through the end of the primary irrigation season. (iv) Mercury concentrations in Corbicula were elevated in upstream reaches of the San Joaquin River, in the Merced and Tuolumne Rivers, and in tributaries draining the Coast Ranges. Mean Cd and Cu concentrations in Corbicula were elevated in the Merced and Tuolumne Rivers, Orestimba Creek and a perennial flow reach of the San Joaquin River which receives water directly from the Delta Mendota Canal. Concentrations of Ni in clams from the San Joaquin River decreased downstream of the Delta Mendota Pool. (v) Boron and Mo were not accumulated by Corbicula despite high solute concentrations (means as high as 2960 micrograms Bl-1 and 9 micrograms Mol-1) in riverwater during the primary irrigation season. This bivalve may not be an appropriate bioindicator of B and Mo enrichment. Concentrations of Cr, Pb, Ag, V and Zn in Corbicula exhibited little geographic variability in the drainage. (vi) Regression analysis revealed no clear evidence of synergistic or antagonistic interactions among As, Cd, Cu, Hg, Ni and Se in their uptake by Corbicula. PMID:2084841

Leland, H V; Scudder, B C

1990-11-01

126

Trace elements in Corbicula fluminea from the San Joaquin River, California  

Science.gov (United States)

(i) Trace element concentrations in soft tissue of the benthic bivalve, Corbicula fluminea, from the San Joaquin River and its major tributaries were examined during the primary irrigation season in relation to the spatial variation in concentrations of major, minor and trace constituents in riverwater and sediments. (ii) Selenium concentrations in Corbicula from perennial flow reaches of the San Joaquin River and its major tributaries varied directly with the solute (??? 0.45 ??m) Se concentrations of riverwater. Elevated concentrations occurred in clams from sites with substantial discharge originating as subsurface drainage and irrigation return flows. Both tissue and solute Se concentrations declined from June through the end of the primary irrigation season. (iii) Arsenic concentrations in Corbicula from perennial flow reaches of the San Joaquin River varied directly with the HNO3-extractable (pH 2) As:Fe ratio of suspended matter, providing evidence that sorption to oxyhydroxide surfaces is an important control on the biological availability of As. However, Corbicula from several tributaries draining alluvium derived from the Sierra Nevada had lower As concentrations than would be predicted by the relation developed for perennial flow sites of the San Joaquin River. Arsenic concentrations in Corbicula from the Tuolumne and Merced Rivers and upstream reaches of the San Joaquin River were higher than in clams from the downstream perennial flow reaches of the San Joaquin River. Concentrations of As in clams from downstream perennial flow reaches of the San Joaquin River increased from June through the end of the primary irrigation season. (iv) Mercury concentrations in Corbicula were elevated in upstream reaches of the San Joaquin River, in the Merced and Tuolumne Rivers, and in tributaries draining the Coast Ranges. Mean Cd and Cu concentrations in Corbicula were elevated in the Merced and Tuolumne Rivers, Orestimba Creek and a perennial flow reach of the San Joaquin River which receives water directly from the Delta Mendota Canal. Concentrations of Ni in clams from the San Joaquin River decreased downstream of the Delta Mendota Pool. (v) Boron and Mo were not accumulated by Corbicula despite high solute concentrations (means as high as 2960 ??g B l-1 and 9 ??g Mo l-1) in riverwater during the primary irrigation season. This bivalve may not be an appropriate bioindicator of B and Mo enrichment. Concentrations of Cr, Pb, Ag, V and Zn in Corbicula exhibited little geographic variability in the drainage. (vi) Regression analysis revealed no clear evidence of synergistic or antagonistic interactions among As, Cd, Cu, Hg, Ni and Se in their uptake by Corbicula.

Leland, H.V.; Scudder, B.C.

1990-01-01

127

Gas-Oil Relative Permeability and Residual Oil Saturation as Related to Displacement Instability and Dimensionless Numbers Étude de la perméabilité relative gaz-huile et de la saturation en huile résiduelle dans le cas d’une instabilité de déplacement et des nombres sans dimension s’y rapportant  

OpenAIRE

Displacement experiments of the gas-oil system are performed on long core scale models by varying the petrophysical properties and flowing conditions. Experiments are conducted in situations where capillary, gravity and viscous forces are comparable. From oil production history and picture analysis, the threshold for the stability is determined. The experimental findings are comparable to the results of a gradient percolation theory. The effect of destabilized front velocity on relative ...

Rostami B.; Kharrat R.; Ghotbi C.; Tabatabaie S.H.

2009-01-01

128

SAFOD Penetrates the San Andreas Fault  

OpenAIRE

SAFOD, the San Andreas Fault Observatory at Depth (Fig. 1), completed an important milestone in July 2005 by drilling through the San Andreas Fault at seismogenic depth. SAFOD is one of three major components of EarthScope, a U.S. National Science Foundation (NSF) initiative being conducted in collaboration with the U.S. Geological Survey (USGS). The International Continental Scientific DrillingProgram (ICDP) provides engineering and technical support for the project as well as online access ...

Zoback, M. D.

2006-01-01

129

SANS observations on weakly flocculated dispersions  

DEFF Research Database (Denmark)

Structural changes occurring in colloidal dispersions of poly-(methyl metacrylate) (PMMA) particles, sterically stabilized with poly-(12-hydroxystearic acid) (PHSA), while varying the solvent quality, temperature and shear rate, are investigated by small-angle neutron scattering (SANS). For a moderately concentrated dispersion in a marginal solvent the transition on cooling from the effective stability to a weak attraction is monitored, The degree of attraction is determined in the framework of the sticky spheres model (SSM), SANS and rheological results are correlated.

Mischenko, N.; Ourieva, G.

1997-01-01

130

Cacao use and the San Lorenzo Olmec  

OpenAIRE

Mesoamerican peoples had a long history of cacao use—spanning more than 34 centuries—as confirmed by previous identification of cacao residues on archaeological pottery from Paso de la Amada on the Pacific Coast and the Olmec site of El Manatí on the Gulf Coast. Until now, comparable evidence from San Lorenzo, the premier Olmec capital, was lacking. The present study of theobromine residues confirms the continuous presence and use of cacao products at San Lorenzo between 1800 and 1000 BC...

Powis, Terry G.; Cyphers, Ann; Gaikwad, Nilesh W.; Grivetti, Louis; Cheong, Kong

2011-01-01

131

Reunión del comité Pro San Antonio  

OpenAIRE

Reunión del Comité Pro San Antonio se realizó en la sede de "San Antonio puesto de cabeza", con el objetivo de revitalizar el sector. la reunión precedida por María Cecilia Araya de la Cámara de Comercio de Cali, y el arquitecto Jose Luis Giraldo. El Archivo del Patrimonio Fotográfico y Fílmico del Valle del Cauca es responsabilidad de la Biblioteca Departamental del Valle Jorge Garcés Borrero, por convenio de cooperación suscrito con la Secretaria del Cultura Departamental, con el ...

Marulanda, Jorge

1989-01-01

132

Seasonal/Yearly Salinity Variations in San Francisco Bay  

Science.gov (United States)

The ability of resource agencies to manage fish, wildlife and freshwater supplies of San Francisco Bay estuary requires an integrated knowledge of the relations between the biota and their physical environment. A key factor in these relations is the role of salinity in determining both the physical and the biological character of the estuary. The saltiness of the water, and particularly its seasonal and interannual patterns of variability, affects which aquatic species live where within the estuary. Salinity also determines where water can and cannot be diverted for human consumption and irrigated agriculture, and plays a role in determining the capacity of the estuary to cleanse itself of wastes. In short, salinity is a fundamental property of estuarine physics and chemistry that, in turn, determines the biological characteristics of each estuary. Freshwater is a major control on estuarine salinity. Most freshwater supplied to the Bay is from river flow through the Delta, which is primarily runoff from the Sierra Nevada. Most contaminants in San Francisco Bay are from the Sacramento/San Joaquin Valley and the local watershed around the Bay rather than the sea or atmosphere. Land is the primary source of freshwater and freshwater serves as a tracer of land-derived substances such as the trace metals (copper, lead and selenium), pesticides and plant nutrients (nitrate and phosphate). The U.S. Geological Survey is collaborating with other agencies and institutions in studying San Francisco Bay salinity using field observations and numerical simulations to define the physical processes that control salinity. The issues that arise from salinity fluctuations, however, differ in the northern and southern parts of the bay. In North Bay we need to know how salinity responds to freshwater flow through the Sacramento/San Joaquin Delta; this knowledge will benefit water managers who determine how much delta flow is needed a) to protect freshwater supplies for municipal water use and b) modulate salinity for a healthy estuary. In South Bay we need to know where the freshwater comes from (the distant Delta or local streams) to sort out the sources of a) contamination or b) dilution.

Peterson, David H.; Cayan, Daniel R.; Dettinger, Michael D.; DiLeo, Jeanne Sandra; Hager, Stephen E.; Knowles, Noah; Nichols, Frederic H.; Schemel, Laurence E.; Smith, Richard E.; Uncles, Reginald J.

1995-01-01

133

Inteligencia emocional y vínculo laboral en trabajadores del Centro San Camilo / Emotional intelligence and engagement in San Camilo Centre workers  

Scientific Electronic Library Online (English)

Full Text Available SciELO Spain | Language: Spanish Abstract in spanish Las organizaciones están comprometidas desde hace tiempo con la promoción de la salud y del bienestar de los trabajadores. Con este referente se realizó el presente estudio; el objetivo fue describir y analizar las asociaciones que existen entre las variables inteligencia emocional y engagement. La [...] población fueron 150 trabajadores del Centro San Camilo. Los instrumentos de evaluación utilizados son la escala de Inteligencia Emocional (EIE-33), la escala de Inteligencia Emocional (EIE-25), el Trait Meta-Mood Scale (TMMS-24) y cuestionario de Utrecht Work Engagement Scale (UWES). Es un estudio descriptivo correlacional. En los trabajadores del Centro San Camilo existe asociación entre la inteligencia emocional y el engagement. Así la inteligencia emocional, entendida como la capacidad para adquirir habilidades o competencias para la adaptación de las demandas profesionales, potencia un estado mental positivo relacionado con el trabajo y ello repercute en la calidad asistencial y en la salud de la población atendida. Abstract in english For some time organizations are committed with health promotion and workers welfare. Under this concern this study has been conducted; the aim was to describe and analyse the existing associations between emotional intelligence and engagement variables. The population were 150 workers from San Camil [...] o Centre. The assessment instruments used were the scale of Emotional Intelligence (EIE-33), the scale of Emotional Intelligence (EIE-25), the Trait Meta-Mood Scale (TMMS-25) and the questionnaire of Utrecht Work Engagement Scale (UWES). It is a descriptive correlational study. In San Camilo Centre workers there is association between emotional intelligence and engagement. Emotional intelligence, understood as the capacity to acquire skills or competencies for the adaptation to professional demands thus enhances a positive mental state work-related and this affects the quality of care and the assisted population health.

Cristina, Liébana Presa; M.ª Elena, Fernández Martínez; José Carlos, Bermejo Higuera; M.ª Rosa, Carabias Maza; M.ª Aurora, Rodríguez Borrego; Marta, Villacieros Durbán.

2012-06-01

134

Inteligencia emocional y vínculo laboral en trabajadores del Centro San Camilo Emotional intelligence and engagement in San Camilo Centre workers  

Directory of Open Access Journals (Sweden)

Full Text Available Las organizaciones están comprometidas desde hace tiempo con la promoción de la salud y del bienestar de los trabajadores. Con este referente se realizó el presente estudio; el objetivo fue describir y analizar las asociaciones que existen entre las variables inteligencia emocional y engagement. La población fueron 150 trabajadores del Centro San Camilo. Los instrumentos de evaluación utilizados son la escala de Inteligencia Emocional (EIE-33, la escala de Inteligencia Emocional (EIE-25, el Trait Meta-Mood Scale (TMMS-24 y cuestionario de Utrecht Work Engagement Scale (UWES. Es un estudio descriptivo correlacional. En los trabajadores del Centro San Camilo existe asociación entre la inteligencia emocional y el engagement. Así la inteligencia emocional, entendida como la capacidad para adquirir habilidades o competencias para la adaptación de las demandas profesionales, potencia un estado mental positivo relacionado con el trabajo y ello repercute en la calidad asistencial y en la salud de la población atendida.For some time organizations are committed with health promotion and workers welfare. Under this concern this study has been conducted; the aim was to describe and analyse the existing associations between emotional intelligence and engagement variables. The population were 150 workers from San Camilo Centre. The assessment instruments used were the scale of Emotional Intelligence (EIE-33, the scale of Emotional Intelligence (EIE-25, the Trait Meta-Mood Scale (TMMS-25 and the questionnaire of Utrecht Work Engagement Scale (UWES. It is a descriptive correlational study. In San Camilo Centre workers there is association between emotional intelligence and engagement. Emotional intelligence, understood as the capacity to acquire skills or competencies for the adaptation to professional demands thus enhances a positive mental state work-related and this affects the quality of care and the assisted population health.

Cristina Liébana Presa

2012-06-01

135

Arquitectura formativa en San Pedro de Atacama  

Directory of Open Access Journals (Sweden)

Full Text Available En este artículo se caracterizan arquitectónicamente los sitios Tulor-1, Calar y Ghatchi-2C aplicando una metodología sistemática ya probada en otros asentamientos habitacionales del área. En forma complementaria se presentan los antecedentes disponibles sobre arquitectura del Período Formativo en la región de San Pedro de Atacama como en espacios contiguos, para discutir la evolución del patrón aldeano y sus implicancias en el sistema de asentamiento. Se sugiere que factores rituales fueron importantes en los inicios del desarrollo arquitectónico en un contexto de sociedades eminentemente pastoriles, para luego evaluar el rol que estos asentamientos cumplieron una vez consolidados en este nuevo paisaje cultural.This paper characterizes the architecture of three sites (Tulor-1, Calar and Ghatchi-2C by contrasting our results with the records already available about the Formative Period's architecture in the region and nearby places. This enable us to discuss the evolution of villager settlement patterns and its impact in the overall settlement system. The importance ritual factors seemed to have in the development of architecture is linked to a social context eminently composed by shepherd societies and the relatively important role played by their settlements as they consolidated into enclaves of a new cultural landscape.

Leonor Adán A

2007-01-01

136

San Onofre unit 1 water hammer event  

International Nuclear Information System (INIS)

San Onofre Unit 1 experienced a severe water hammer event in the main feedwater (MFW) system on November 21, 1985. Southern California Edison (SCE) performed an extensive investigation and evaluation to determine the cause and effect of the event. The most significant finding was that five MFW system check valves had degraded to an inoperable condition prior to the event. The inoperable check valves caused the formation of a water hammer in the B MFW line which, in turn, caused a reactor trip transient to escalate into a more serious event. The water hammer created a MFW system leak which affected the capability of the auxiliary feedwater system to perform its safety-related shutdown function. Moderate damage was sustained in the MFW and Condensate system including the rupture of the evaporator heater and flash chamber shell (a 21-foot long split in the weld seam). In spite of the MFW system leak and damage, the inherent redundance and defense in depth built into the plant allowed the operators to shut down and stabilize the plant in a timely and orderly manner

137

San Francisco e a nova economia do desejo / San Francisco and the new economy of desire  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Este artigo apresenta reflexões preliminares de uma pesquisa desenvolvida durante sete meses em San Francisco, Estados Unidos, a qual se associa a outra em andamento na capital paulista desde 2007. Busca sintetizar como o uso de sites e aplicativos em busca de parceiros amorosos e sexuais constitui [...] um fenômeno de transformação tecnológica e comportamental que se relaciona com profundas transformações econômicas no trabalho e na organização do espaço urbano. Assim reconstitui historicamente e analisa em termos sociológicos essas conexões em uma das cidades em que elas são mais visíveis. O objetivo é trazer elementos históricos, etnográficos, teóricos e conceituais para compreender a nova realidade sociotecnológica em que vivemos, que tem transformado o erotismo, a sexualidade e a moral a ela relacionada. Abstract in english This paper presents preliminary reflections about a research conduced during seven months in San Francisco, USA, which is also associated to one developed in São Paulo, Brazil, since 2007. It aims to synthetize how the use of sites and apps in the search for love and sexual partners constitutes a te [...] chnological and comportamental phenomenon associated with deep economic, work and urban transformations. Therefore, it reconstitutes historically these connections and analyses them sociologically in one of the cities where they are more visible. The objective is to bring historical, ethnographic, theoretical and conceptual elements to understand the new socio-technical reality, in which we live, the same that has transformed the sphere of eroticism, of sexuality and of the morality related to them.

Richard, Miskolci.

2014-04-01

138

Utilization of oil-decomposing microorganisms. Part 1. Relative concentration of docosahexaenoic acid by candida famata US 238; Yushi bunkai biseibutsu no riyo. 1. Candida famata US-238 kabu ni yoru dokosahekisaen san no sotaiteki noshuku  

Energy Technology Data Exchange (ETDEWEB)

DHA (docosahexaenoic acid) is attracting much attention recently. If DHA of fish oil in natural oil resources is needed to be used more effectively for practical applications, high DHA content ratio is required. For this purpose, fat acid characteristics (unique) arise during oil decomposition is used in microorganism. Microorganisms which have low decomposing ability for DHA are screened among oil decomposing microorganisms. Adjustment of DHA concentrated oil is tested using above mentioned microorganisms. The results of the screening tests are given as follows. A strain called candida famata US-238 is identified which increases sardine fish oil`s DHA concentration from 14.1% to 22.6%. The optimal cultivation conditions to increase relative concentration of DHA from fish oils using this strain are examined. Furthermore carrying culture examination employing 10L jar fermenter, an oil containing about 50% DHA is obtained. 9 refs., 6 tabs.

Minami, K.; Yamamoto, H.; Tsujiwaki, Y. [Ueda Oils Fats Manufacturing Co. Ltd., Kobe (Japan); Ichimoto, I. [Univ. of Osaka Prefecture, Osaka (Japan)

1996-08-20

139

Magmatism and mineralization ages from northeast area of La Sierra de San Luis, Argentina  

International Nuclear Information System (INIS)

Three igneous rock groups, characterized as pre, sin and post-kinematics, have intruded the crystalline basement of Sierra de San Luis, Argentina. The ore deposits are associated with Devonian to Carboniferous epizonal granite stocks and batholiths in an area underlain by metamorphic rocks. This granitoids are characterized as post-kinematics magmatism. Model lead ages on the ore deposits (338,8 - 292,1 Ma) are strongly supported by K-Ar ages of the intrusives. The bulk of the north Sierra de San Luis ore deposits are genetically related to late Carboniferous granite plutons. The ore bodies are tungsten veins with greisen envelopes, lead veins, epithermal fluorite veins and REE and Th deposit. A generalized scheme of ore bodies related to granites is proposed. The ore deposits and their lithotectonic setting are characteristic of Gondwana metallogenetic Epoch in the Sierra de San Luis (au)

140

San Onofre Unit 1 decommissioning  

Energy Technology Data Exchange (ETDEWEB)

Nuclear plant decommissioning presents several challenges in radiation protection. The plant demolition must consider radiation protection for workers, protection of the public, and careful material management. Decommissioning of the San Onofre Nuclear Generating Station (SONGS) Unit 1 presented some additional challenges. Including complete removal of above ground structures this can be accomplished safely and efficiently. None of the low-level radioactive waste is unique to decommissioning although transportation of large components can be a significant challenge. Proven techniques are available to handle Greater than Class C waste (highly activated reactor internals) and spent fuel. A considerable challenge is the disposing of the very large volume of potentially clean material. There is a high cost to survey and decontaminate materials. Moreover, in the US today there are no standards for the clearance of potentially contaminated volumetric materials. Careful planning is necessary to determine the most cost-effective means for waste management, whether it includes decontamination and surveys or simple disposal. Lastly, existing ALARA programs with some minor modifications provide sufficient worker and public protection from radiation.

Goldin, Eric M. [CHP, Southern California Edison, P. O. Box 128, San Clemente, CA 92674-0128 (United States)

2004-07-01

141

Particularidades del escurrimiento de la cuenca cubana San Juan / Runoff particularities of Cuban basin San Juan  

Scientific Electronic Library Online (English)

Full Text Available SciELO Cuba | Language: Spanish Abstract in spanish La cuenca San Juan, dividida en las subcuencas San Juan, San Agustín y Cañas, difiere totalmente de otras cuencas de la provincia. Los altos valores de los módulos del escurrimiento medio de los ríos y sus distribuciones dentro del año e hiperanual confirman esta particularidad, la cual fue comproba [...] da con las investigaciones complementarias realizadas durante el periodo seco del 2011. El análisis del comportamiento del escurrimiento de la subcuenca San Agustín-Cañas, incluyendo el funcionamiento del trasvase MatanzasMayabeque, conllevó a los decisores a desarrollar un programa de gestión integrada de los recursos hídricos de esta cuenca. Abstract in english The San Juan basin, divided into sub-basins San Juan, San Agustín and Cañas, is completely different from other basins in the province. The high modular values of average river runoff, its within-year distribution and its overyear distribution confirm this peculiarity, which was checked with additio [...] nal research conducted during the dry period of 2011. The behavior of the subbasin runoff of San Agustín-Cañas, including the operation of the water diversion canal MatanzasMayabeque, led the decision makers to develop an integrated water resources management program for this basin.

Katia Luisa, Rosario Rodríguez; Viera, Petrova Nicolaevna; Alberto, Cuéllar Valenzuela; Dailene, Acosta Freyre; Armando, Hernández Valdés; Haydée, Llanusa Ruiz.

2013-12-01

142

The Seismic Response of the San Bernardino Basin Region  

Science.gov (United States)

The San Bernardino region of southern California is situated on a wedge shaped sedimentary basin bounded by the San Andreas and San Jacinto faults. Both of these active faults are capable of generating Mw 7+ earthquakes, stressing the need for timely assessment of the ground shaking hazard for future earthquakes. Sediments are relatively thin in the northern portion of the basin, and then steadily increase in thickness toward the south. The maximum sediment thickness is about 1.5 km just north of the San Jacinto fault, with an abrupt step-up and shallowing of the basement surface along the San Jacinto fault. Observations of long period ground motions on a dense array of strong motion stations for both large (Mw 7.2 Hector Mine) and small (Mw 4.7 Big Bear Lake) earthquakes show significant amplification and extended durations of shaking at sites within the basin. Preliminary 3D models of the basin structure have been developed using constraints from potential field data and seismic reflection profiles. These models work well at matching the observed waveforms at periods of about 3 seconds and longer. In order to provide ground motion estimates for more practical (engineering) purposes, the resolution limit of these models needs to be extended down to periods near 1 second. Not only does this present a formidable computational task, but perhaps more importantly, it requires accurate knowledge of source processes and 3D velocity structure on a very detailed level. Unfortunately, direct measurements of shear velocity in the basin sediments are not available. Our modeling suggests that near surface shear velocities of about 300 to 400 m/s are required to match the observed waveforms down to periods near 1 second. Additionally, the effects of anelastic attenuation become increasingly important in these softer materials, and must be included in the calculations. Finally, we note that although the use of small events for validation studies is attractive, these events are not always ``simple''. The Big Bear Lake sequence indicates that the structure outside of the basin contains complexities (e.g., mid-crustal reflectors) that significantly affect the waveforms around periods of 1 second. These structural complexities must be properly accounted for in the background velocity models in order to adequately understand the response of the basin sediments.

Graves, R. W.

2002-12-01

143

Compact High Resolution SANS using very cold neutrons (VCN-SANS)  

International Nuclear Information System (INIS)

SANS (Small Angle Neutron Scattering) is a popular method for elucidation of nano-scale structures. However science continually challenges SANS for higher performance, prompting exploration of ever-more exotic and expensive technologies. We propose a compact high resolution SANS, using very cold neutrons, magnetic focusing lens and a wide-angle spherical detector. This system will compete with modern 40 m pinhole SANS in one tenth of the length, matching minimum Q, Q-resolution and dynamic range. It will also probe dynamics using the MIEZE method. Our prototype lens (a rotating permanent-magnet sextupole), focuses a pulsed neutron beam over 3-5 nm wavelength and has measured SANS from micelles and polymer blends. (authors)

144

Scientific Drilling Into the San Andreas Fault Zone —An Overview of SAFOD’s First Five Years  

OpenAIRE

The San Andreas Fault Observatory at Depth (SAFOD) was drilled to study the physical and chemical processes controlling faulting and earthquake generation along an active, plate-bounding fault at depth. SAFOD is located near Parkfield, California and penetrates a section of the fault that is moving due to a combination of repeating microearthquakes and fault creep. Geophysical logs define the San Andreas Fault Zone to be relatively broad (~200 m), containing several di...

Stephen Hickman; Mark Zoback; William Ellsw

2011-01-01

145

40 CFR 81.21 - San Francisco Bay Area Intrastate Air Quality Control Region.  

Science.gov (United States)

...Control Regions § 81.21 San Francisco Bay Area Intrastate Air Quality Control Region. The San Francisco Bay Area Intrastate Air...County, Contra Costa County, Marin County, Napa County; San Francisco County, San Mateo...

2010-07-01

146

Geologic and hydrologic features of the San Bernardino area, California - with special reference to underflow across the San Jacinto fault  

Science.gov (United States)

This is the second in a series of interpretive reports on subsurface outflow from the ground-water basins of San Bernardino County, Calif., prepared by the U.S. Geological Survey in cooperation with the San Bernardino County Flood Control District. One principal purpose of the study was to estimate the ground-water outflow from the Bunker Hill basin to the Rialto-Colton basin across the San Jacinto fault, which, except locally, forms a nearly impermeable boundary between the two basins. In addition, the report deals qualitatively with the geology, the fault barriers that divide the area into several ground-water basins, the physical nature and degree of imperviousness of the barriers, the occurrence and movement of ground water and fluctuations of water level in the basins, and the chemical quality of surface and ground waters in the San Bernardino area. The report includes a geologic map and sections, water-level-contour maps and profiles, and hydrographs of selected well. The Santa Ana River, the principal stream, flows generally westward across the area. Channels of the river and its tributaries overlie a large irregular structural depression filled with alluvial deposits ranging in age from late Tertiary to Recent and forming a valley bounded on the north by the San Gabriel Mountains, on the east by the San Bernardino Mountains, and on the south by an irregular group of hills. Large alluvial fans underlie most of the area, but its landforms also include alluvial benches and terraces near the mountains, stream channels, and elongate hills, ridges, and scarps along the trace of the San Jacinto fault, which strikes northwestward across the valley about in the center of the area. This fault and others divide the area into ground-water basins, which include the Bunker Hill, Rialto-Colton, upper and lower Lytle and Chino basins. The water-bearing deposits include the following units: the younger alluvium. of Recent age, which occupies principally the backfilled channels beneath the Santa Ana River and its tributaries and through which ground water moves from Bunker Hill basin to Rialto-Colton basin; the older alluvium, of Pleistocene age, which is the principal water-bearing unit of the area and yields water to more than a thousand wells; and continental deposits of Tertiary to Quaternary age, which crop out along the southern margin of the area and locally along the San Gabriel Mountains on the north. The younger alluvium attains a maximum thickness of about 125 feet beneath the Santa Ana River south of San Bernardino. Locally in the Bunker Hill basin it is composed of two members, an upper member of relatively impermeable clay and a lower member of highly permeable material in which water is confined by the upper member. The older alluvium locally has a known thickness greater than 700 feet; elsewhere in the San Bernardino Valley it may exceed 1,400 feet. Locally, where ground water is confined in Bunker Hill basin, the older alluvium is divided into three permeable water-bearing zones separated from each other and from the younger alluvium above by less permeable zones. In parts of Chino and Rialto-Colton basins the alluvium consists of a coarse-grained facies along a former course of a major stream that is interfingered with and overlain by relatively fine-grained deposits. The permeability of the younger alluvium in the area beneath the Santa Ana River downstream from the San Jacinto fault was determined from tests to be about 2,700 gallons per day per square foot. The permeability of the coarse water-yielding materials of the older alluvium several miles downstream was estimated from tests to be about the same magnitude. Rocks that yield practically no water include continental rocks of Tertiary age, which are not exposed in the area but are tapped by wells in Rialto-Colton basin, and crystalline and metamorphic rocks of pre-Tertiary age that form the bedrock of the area. Faults across the valley area fo

Dutcher, L.C.; Garrett, Arthur A.

1963-01-01

147

The Church of San Miniato al Monte, Florence: Astronomical and Astrological Connections  

Science.gov (United States)

The church of San Miniato al Monte is examined in the context of interest in astrology and astronomy in early Renaissance Florence. Vitruvius emphasised the need for architects to "be acquainted with astronomy and the theory of the heavens" in his famous Ten Books of Architecture and, at San Miniato, astronomical and astrological features are combined in order to link humanity with the celestial or spiritual realm. The particular significance of Pisces and Taurus is explored in relation to Christian symbolism, raising questions about the role of astronomy and astrology in art and architecture.

Shrimplin, V.

2011-06-01

148

Formation of fullerene clusters in the system C 60/NMP/water by SANS  

Science.gov (United States)

Solutions of fullerenes in nitrogen-containing solvents constitute a specific class characterized by the formation of fullerene clusters. In the given work, we report the effect of cluster rearrangement in the system C 60/ N-methylpyrrolidone (NMP) after addition of water (miscible with NMP) as observed by small-angle neutron scattering (SANS). The effect has a critical character and takes place if the water relative content is higher than 40%. Despite a small scattering signal, estimates of the mean scattering length density of the clusters by SANS contrast variation can be done.

Aksenov, V. L.; Avdeev, M. V.; Tropin, T. V.; Korobov, M. V.; Kozhemyakina, N. V.; Avramenko, N. V.; Rosta, L.

2006-11-01

149

Formation of fullerene clusters in the system C60/NMP/water by SANS  

International Nuclear Information System (INIS)

Solutions of fullerenes in nitrogen-containing solvents constitute a specific class characterized by the formation of fullerene clusters. In the given work, we report the effect of cluster rearrangement in the system C60/N-methylpyrrolidone (NMP) after addition of water (miscible with NMP) as observed by small-angle neutron scattering (SANS). The effect has a critical character and takes place if the water relative content is higher than 40%. Despite a small scattering signal, estimates of the mean scattering length density of the clusters by SANS contrast variation can be done

150

Psychiatric Disorders and Substance Use in Homeless Youth: A Preliminary Comparison of San Francisco and Chicago  

Directory of Open Access Journals (Sweden)

Full Text Available Youth homelessness is a growing problem in the United States. The experience of homelessness appears to have numerous adverse consequences, including psychiatric and substance use disorders. This study compared the frequencies of psychiatric disorders, including substance use, between homeless youth (18–24 years-old in San Francisco (N = 31 and Chicago (N = 56. Subjects were administered the Mini International Neuropsychiatric Interview (M.I.N.I. to assess DSM-IV-TR diagnoses and substance use disorders. Eighty-seven percent of the San Francisco youth, and 81% of the Chicago youth met criteria for at least one M.I.N.I. psychiatric diagnosis. Nearly two-thirds of the youth in both samples met criteria for a mood disorder. Approximately one-third met criteria for an anxiety disorder. Thirty-two percent of the San Francisco sample and 18% of the Chicago met criteria for Antisocial Personality Disorder. Approximately 84% of the San Francisco youth and 48% of the Chicago youth met criteria for a substance-related disorder, and more substances were used by San Francisco youth. In conclusion, the high rate of psychiatric disorders in homeless youth provides clear evidence that the mental health needs of this population are significant. Implications are discussed.

Ernika G. Quimby

2012-08-01

151

Uranium occurrences in the pegmatite 'Las Cuevas', province of San Luis, Argentine Republic  

International Nuclear Information System (INIS)

Mineral associations found in an uranium deposit of Sierras Pampeanas, San Luis, are considered in these papers. Damourite stands out among the uranium minerals related to uraninite and coffinite. Pyrite, marcasite and other sulphides are found together with apatite and gummite. Autunite is the uranium secondary mineral more abundant. A mineralization with epigenetic contribution by circulating solutions is suggested to the studied area. (Author)

152

SAN FRANCISCO BAY ESTUARY PROJECT 2002 IR POST-CCMP NEP REPORT  

Science.gov (United States)

The San Francisco Bay Estuary Project Implementation Review (IR) summarizes the progress and challenges ahead for the Project through examination of it activities in relation to the CCMP. Contents of the IR include: CCMP Implementation which has the status of efforts on Priority ...

153

Fundamento y aproximación Metodológica del Estudio de peces del Río San Pedro Basis and Methodological Approach for the Study of the San Pedro River Fish Fauna  

Directory of Open Access Journals (Sweden)

Full Text Available El río San Pedro corresponde al sistema fluvial que desagua la cadena de ocho lagos andinos de la cuenca del río Valdivia (Región de los Ríos. Este sistema recorre 40 km entre el desagüe del lago Riñihue y su confluencia con el río Collileufu, donde cambia de nombre a río Calle Calle. En él se proyectó construir la "Central Hidroeléctrica San Pedro", cuyo muro se ubica 14 km aguas abajo del desagüe del lago Riñihue y la cual transforma 12,5 km de río en embalse. Ello generó la necesidad de elaborar un Estudio de Impacto Ambiental, el cual fue desarrollado por el Centro de Ciencias Ambientales Eula Chile (Universidad de Concepción. En relación a la ecología del río, dicho estudio puso especial énfasis en generar el conocimiento de detalle sobre su ictiofauna, con el fin de efectuar una evaluación de impactos especie específica. En este artículo presentamos los fundamentos y aproximaciones metodológicas para llevar a cabo el estudio intensivo, cuyos resultados dan origen a esta publicación monográfica y a la descripción de la distribución, abundancia, uso de hábitat, patrones de desplazamiento, relaciones de longitud-peso, primeros estadíos de vida y estructura genética de la ictiofauna del río San Pedro.The San Pedro River is the fluvial system being drained by the chain of eight Andean lakes in the Valdivia River Basin (de los Ríos Region. This system covers 40 km from the outlet of Riñihue Lake to its confluence with the Collileufu River, where it is renamed as Calle Calle River. In the San Pedro River, the "Central Hidroeléctrica San Pedro" (San Pedro Hydroelectric Plant is planned, whose dam is located 14 km downstream from the outlet of the Riñihue Lake, which will transform 12.5 km of river in a reservoir. This generated the need for an Environmental Impact Assessment, which was developed by the Center for Environmental Sciences EULA-Chile (Universidad de Concepción. In relation to the river ecology, the study placed special emphasis on generating detailed knowledge about their ichthyofauna, in order to make a species-specific impact assessment. In this issue, we present the foundations and methodological approaches to undertake the intensive study, whose results give rise to this monograph and to the description of the distribution, abundance, habitat use, movement patterns, length-weight relationships, early life stages and genetic structure of the fish fauna of San Pedro River.

Evelyn Habit

2012-01-01

154

Fundamento y aproximación Metodológica del Estudio de peces del Río San Pedro / Basis and Methodological Approach for the Study of the San Pedro River Fish Fauna  

Scientific Electronic Library Online (English)

Full Text Available SciELO Chile | Language: Spanish Abstract in spanish El río San Pedro corresponde al sistema fluvial que desagua la cadena de ocho lagos andinos de la cuenca del río Valdivia (Región de los Ríos). Este sistema recorre 40 km entre el desagüe del lago Riñihue y su confluencia con el río Collileufu, donde cambia de nombre a río Calle Calle. En él se proy [...] ectó construir la "Central Hidroeléctrica San Pedro", cuyo muro se ubica 14 km aguas abajo del desagüe del lago Riñihue y la cual transforma 12,5 km de río en embalse. Ello generó la necesidad de elaborar un Estudio de Impacto Ambiental, el cual fue desarrollado por el Centro de Ciencias Ambientales Eula Chile (Universidad de Concepción). En relación a la ecología del río, dicho estudio puso especial énfasis en generar el conocimiento de detalle sobre su ictiofauna, con el fin de efectuar una evaluación de impactos especie específica. En este artículo presentamos los fundamentos y aproximaciones metodológicas para llevar a cabo el estudio intensivo, cuyos resultados dan origen a esta publicación monográfica y a la descripción de la distribución, abundancia, uso de hábitat, patrones de desplazamiento, relaciones de longitud-peso, primeros estadíos de vida y estructura genética de la ictiofauna del río San Pedro. Abstract in english The San Pedro River is the fluvial system being drained by the chain of eight Andean lakes in the Valdivia River Basin (de los Ríos Region). This system covers 40 km from the outlet of Riñihue Lake to its confluence with the Collileufu River, where it is renamed as Calle Calle River. In the San Pedr [...] o River, the "Central Hidroeléctrica San Pedro" (San Pedro Hydroelectric Plant) is planned, whose dam is located 14 km downstream from the outlet of the Riñihue Lake, which will transform 12.5 km of river in a reservoir. This generated the need for an Environmental Impact Assessment, which was developed by the Center for Environmental Sciences EULA-Chile (Universidad de Concepción). In relation to the river ecology, the study placed special emphasis on generating detailed knowledge about their ichthyofauna, in order to make a species-specific impact assessment. In this issue, we present the foundations and methodological approaches to undertake the intensive study, whose results give rise to this monograph and to the description of the distribution, abundance, habitat use, movement patterns, length-weight relationships, early life stages and genetic structure of the fish fauna of San Pedro River.

Evelyn, Habit; Oscar, Parra.

155

New IP SAN Era in Cluster Mirroring  

Directory of Open Access Journals (Sweden)

Full Text Available Storage replication is one of the back bones for network environments. While many forms of Network Attached Storage (NAS, Storage Area Networks (SAN and other forms of network storage exist, there is a need for a reliable storage replication technique between distant sites (> 1 Km. Such technology allows setting new standards and removes demerits of network failover and failback systems for virtual servers; specifically, the growing storage need for effective disaster recovery (DR planning. The purpose of this manuscript is to identify growing technologies such as IP-SAN that allow with remote storage cluster replication for virtual servers. This study (Cluster Replication provides an analysis of improving the uptime and availability of SAN. For higher levels of availability, mirrored images maintained in Active/Active Cluster mirroring can provide a system with No Single Points of Failure, which is designed to improve the overall uptime of the storage system for organizations with 7x24x365 requirements.

Mr. Rajendra Purohit

2012-12-01

156

SAAF: SANS data Analysis using Analytical Functions  

Energy Technology Data Exchange (ETDEWEB)

The recently completed Extended Q-Range Small Angle Scattering Diffractometer (EQ-SANS) has put the focus on its software needs with renewed urgency. In a series of efforts, we aim at providing a complete set of software solutions on the EQ-SANS instrument. These programs include initial data processing, data correction and reduction, analytical model fitting to the scattering data, Monte Carlo simulation for structure determination, and virtual instrument simulation for experiment planning. SAAF is one such program for analytical data modeling. It takes the reduced EQ-SANS data and allows users to fit the data to analytical models. These models are easy to write. They can either be user written, or from the pre-supplied model library.

Zhao, Jinkui [ORNL

2011-01-01

157

Cacao use and the San Lorenzo Olmec  

Science.gov (United States)

Mesoamerican peoples had a long history of cacao use—spanning more than 34 centuries—as confirmed by previous identification of cacao residues on archaeological pottery from Paso de la Amada on the Pacific Coast and the Olmec site of El Manatí on the Gulf Coast. Until now, comparable evidence from San Lorenzo, the premier Olmec capital, was lacking. The present study of theobromine residues confirms the continuous presence and use of cacao products at San Lorenzo between 1800 and 1000 BCE, and documents assorted vessels forms used in its preparation and consumption. One elite context reveals cacao use as part of a mortuary ritual for sacrificial victims, an event that occurred during the height of San Lorenzo's power. PMID:21555564

Powis, Terry G.; Cyphers, Ann; Gaikwad, Nilesh W.; Grivetti, Louis; Cheong, Kong

2011-01-01

158

Salt Ponds, South San Francisco Bay  

Science.gov (United States)

higher resolution 1000 pixel-wide image The red and green colors of the salt ponds in South San Francisco Bay are brilliant visual markers for astronauts. The STS-111 crew photographed the bay south of the San Mateo bridge in June, 2002. This photograph is timely because a large number of the salt ponds (more than 16,500 acres) that are owned by Cargill, Inc. will be sold in September for wetlands restoration-a restoration project second in size only to the Florida Everglades project. Rough boundaries of the areas to be restored are outlined on the image. Over the past century, more than 80% of San Francisco Bay's wetlands have been filled and developed or diked off for salt mining. San Francisco Bay has supported salt mining since 1854. Cargill has operated most of the bay's commercial salt ponds since 1978, and had already sold thousands of acres to the State of California and the Don Edwards National Wildlife Refuge. This new transaction will increase San Francisco Bay's existing tidal wetlands by 50%. The new wetlands, to be managed by the California Department of Fish and Game and the U.S. Fish and Wildlife Service, will join the Don Edwards National Wildlife Refuge, and provide valuable habitat for birds, fish and other wildlife. The wetlands will contribute to better water quality and flood control in the bay, and open up more coastline for public enjoyment. Additional information: Cargill Salt Ponds (PDF) Turning Salt Into Environmental Gold Salt Ponds on Way to Becoming Wetlands Historic Agreement Reached to Purchase San Francisco Bay Salt Ponds Astronaut photograph STS111-376-3 was provided by the Earth Sciences and Image Analysis Laboratory at Johnson Space Center. Additional images taken by astronauts and cosmonauts can be viewed at the NASA-JSC Gateway to Astronaut Photography of Earth

2002-01-01

159

Forecasting the Next Great San Francisco Earthquake  

Science.gov (United States)

The great San Francisco earthquake of 18 April 1906 and its subsequent fires killed more than 3,000 persons, and destroyed much of the city leaving 225,000 out of 400,000 inhabitants homeless. The 1906 earthquake occurred on a km segment of the San Andreas fault that runs from the San Juan Bautista north to Cape Mendocino and is estimated to have had a moment magnitude m ,l 7.9. Observations of surface displacements across the fault were in the range m. As we approach the 100 year anniversary of this event, a critical concern is the hazard posed by another such earthquake. In this talk we examine the assumptions presently used to compute the probability of occurrence of these earthquakes. We also present the results of a numerical simulation of interacting faults on the San Andreas system. Called Virtual California, this simulation can be used to compute the times, locations and magnitudes of simulated earthquakes on the San Andreas fault in the vicinity of San Francisco. Of particular importance are new results for the statistical distribution of interval times between great earthquakes, results that are difficult or impossible to obtain from a purely field-based approach. We find that our results are fit well under most circumstances by the Weibull statistical distribution, and we compute waiting times to future earthquakes based upon our simulation results. A contrasting approach to the same problem has been adopted by the Working Group on California Earthquake Probabilities, who use observational data combined with statistical assumptions to compute probabilities of future earthquakes.

Rundle, P.; Rundle, J. B.; Turcotte, D. L.; Donnellan, A.; Yakovlev, G.; Tiampo, K. F.

2005-12-01

160

Radium 228 distribution and mixing in San Nicolas and San Pedro Basins, southern California borderland  

International Nuclear Information System (INIS)

Sediment profiles of 228Ra and 232Th and water column profiles of 228Ra are presented for San Nicolas and San Pedro Basins, located in the Southern California Borderland. These data are used to estimate fluxes of 228Ra from the sediments, the vertical eddy diffusivity (Kz) in the water column, and the upwelling velocity (wz). The fluxes of 228Ra from sediments, estimated by integrating the downcore deficiency of 228Ra with respect to its parent nuclide 232Th, are 335 ± 115 atoms/m2s for San Nicolas Basin and 166 ± 50 atom/m2s for San Pedro Basin. San Nicolas Basin sediments have an excess of 228Ra in the upper 4 cm, but irrigation and diffusion create a 228Ra deficiency from 4 to 30 cm. San Pedro Basin sediments are anoxic and laminated, have a 228Ra deficiency above 6-12 cm depth, and have no surface excess of 228Ra. Basin waters appear to be well-mixed horizontally below sill depth and in steady-state with respect to 228Ra. Concentrations of 228Ra increase from sill depth to the bottom, ranging from approximately 1.0 dpm/100 kg to 2.4 dpm/100 kg in San Nicolas Basin and from 1.6 dpm/100 kg to 3.1 dpm/100 kg in San Pedro Basin. Estimates of Kz and wz at several horizons in these basins are made by evaluating two steady state mass balance equations, one for 228Ra and one for heat. Upper limits for Kz are 23 cm2/s at 1,700 m in San Nicolas and 2.8 cm2/s at 850 m in San Pedro Basin. The best estimate for Kz and wz for the deeper part of the basins are: Kz = 5-17 cm2/s and wz = 50-150 m/y in San Nicolas Basin, and Kz = 1-3 cm2/s and wz = 20-50 m/y in San Pedro Basin

161

Site testing at San Pedro Mártir  

Directory of Open Access Journals (Sweden)

Full Text Available En este art culo revisamos el trabajo realizado para medir la turbulencia atmosf erica al nivel del suelo en el Observatorio Astron omico Nacional en San Pedro M artir. Arguimos, basados en resultados m as modernos obtenidos a lo largo de m as de una d ecada, que la mediana de la calidad de imagen es de 0.55 segundos de arco a una altura de 15m. Este an alisis comprueba que San Pedro M artir es uno de los mejores sitios del mundo en cuanto a calidad de imagen y probablemente el mejor.

J. Echeverr\\u00EDa

2003-01-01

162

Nanostructural characterisation of catalysts by SANS  

International Nuclear Information System (INIS)

A series of restructured clays used as catalysts in small- and large-scale chemical reactions, have been studied by small-angle neutron scattering (SANS). Analysis of the spectra provides detailed information both on the nanopore structure and the surface texture of these materials. Additionally, pillared inter-layered clays (PILCs) have a great potential for industrial utilisation in catalysis, sorption and separations. PILCs have been studied with contrast-matching SANS in order to independently resolve the structure of each phase since by matching the neutron scattering length density of the clay or the pillars, the scattering curve results only from the non-contrast matched phase

163

Access USGS: San Francisco Bay and Delta  

Science.gov (United States)

The San Francisco Bay and Delta Ecosystem Program of the US Geological Survey has been underway since 1995. This Webpage offers a host of information on USGS research in the San Francisco Bay and Delta regions (see Overview). Organized by subject area, the site features a new Water Information section in addition to sections describing research on biology (exotic species, primary production), wetlands (change and restoration), hazards (coastal erosion, landslides, earthquakes), and land use (urban growth). In addition, the site provides real-time data, geologic maps, and digital maps (topos, aerial photos, and elevations). A collection of links and a What's New section round out the site.

164

Petrography and geochemistry of the San Miguel lignite, Jackson Group (Eocene), South Texas  

Science.gov (United States)

The San Miguel lignite deposit (late Eocene, lower Jackson Group) of south Texas consists of four or more thin (generally San Miguel lignite as mined. Particular attention is given to 12 of the environmentally sensitive trace elements (As, Be, Cd, Cr, Co, Hg, Mn, Ni, Pb, Sb, Se, and U) that have been identified as possible hazardous air pollutants (HAPs) by the United States Clean Air Act Amendments of 1990. A total of 29 rock and lignite samples were collected and characterized by geochemical and petrographic methods. The major conclusions of the study are as follows: (1) The distribution of Mn is inversely related to the ash yield of the lignite samples. This indicates an organic affinity, or an association with finely disseminated minerals in the lignite that contain this element. (2) On a whole-coal basis, the concentration of the HAPs' element Pb is positively related to ash yield in lignite samples. This indicates an inorganic affinity for Pb. (3) Average whole-coal concentrations of As, Be, Sb, and U in the San Miguel samples are greater than published averages for these elements in other U.S. lignites. (4) The upper and lower lignite benches of the San Miguel deposit are both ash- and algal-rich, indicating that these intervals were probably deposited in wetter conditions than those in which the middle intervals formed. (5) The dominance of the eugelinite maceral subgroup over the huminite subgroup indicates that the San Miguel lignites were subjected to peat-forming conditions (either biogenic or chemical) that enabled degradation of wood cellular material into matrix gels, or that the plants that formed these lignite benches were less woody and more prone to formation of matrix gels. (6) An inertinite-rich layer (top of the B bed) might have formed from widespread oxidation of the San Miguel peat as a result of a volcanic ash fall which was subsequently reworked.

Warwick, P.D.; Crowley, S.S.; Ruppert, L.F.; Pontolillo, J.

1996-01-01

165

Cultivos de uso ilícito en el municipio de San Miguel, Putumayo / Coca cultivation in the town of San Miguel, Putumayo  

OpenAIRE

Perico Ortiz, Diana Alexandra (2008) Cultivos de uso ilícito en el municipio de San Miguel, Putumayo / Coca cultivation in the town of San Miguel, Putumayo. Pregrado thesis, Universidad Nacional de Colombia.

Perico Ortiz, Diana Alexandra

2008-01-01

166

The 1793 eruption of San Martín Tuxtla volcano, Veracruz, Mexico  

Science.gov (United States)

San Martín Tuxtla (N18.562°; W95.199°, 1659 masl) is a basaltic volcano located in southern Veracruz, a Mexican State bordering the Gulf of Mexico. It rises in a volcanic field strewn with monogenetic volcanic cones, maars and three other large volcanoes mostly dormant since the late Pliocene: Santa Marta, San Martín Pajapan and Cerro El Vigía. The latest eruptive event of San Martín occurred in 1793 and was described by Don José Mariano Moziño, a naturalist under the commission of the Viceroy of the then New Spain. In this work we present results of the study of this eruption based on historical accounts and field observations. We identified an ash deposit around the volcano related to the 1793 eruption, mapped its distribution and determined its granulometric, petrographic and geochemical characteristics. These studies suggest that the volcano began its activity with explosive phreatomagmatic explosions, which were followed by Strombolian activity; this period lasting from March to October 1793. The activity continued with an effusive phase that lasted probably 2 years. The eruption covered an area of about 480 km 2 with at least 1 cm of ash; the fines reaching distances greater than 300 km from the crater. A total mass of about 2.5 × 10 14 g was ejected and the volcanic columns probably reached altitudes of the order of 10 km during the most explosive phases. The lava emitted formed a coulee that descended the northern flank of the volcano and has an approximate volume of 2.0 × 10 7 m 3.

Espíndola, J. M.; Zamora-Camacho, A.; Godinez, M. L.; Schaaf, P.; Rodríguez, S. R.

2010-11-01

167

An hydroelectrical dam in the San Juan River? (Informative article) ¿Una represa hidroeléctrica sobre el río San Juan? (Artículo informativo)  

OpenAIRE

The author uses the geomorphological map of the San Juan River border sector to indicate the conse- quences for the border area with Costa Rica by the waters rising of the San Juan river hydroelectrical project.El autor utiliza el mapa geomorfológico del sector fronterizo al San Juan para indicar las consecuencias que un proyecto hidroeléctrico en el río San Juan tendría para el sector fronterizo con Costa Rica por la subida de las aguas represadas.

Jean Pierre Bergoeing Guida

2012-01-01

168

An hydroelectrical dam in the San Juan River? (Informative article ¿Una represa hidroeléctrica sobre el río San Juan? (Artículo informativo  

Directory of Open Access Journals (Sweden)

Full Text Available The author uses the geomorphological map of the San Juan River border sector to indicate the conse- quences for the border area with Costa Rica by the waters rising of the San Juan river hydroelectrical project.El autor utiliza el mapa geomorfológico del sector fronterizo al San Juan para indicar las consecuencias que un proyecto hidroeléctrico en el río San Juan tendría para el sector fronterizo con Costa Rica por la subida de las aguas represadas.

Jean Pierre Bergoeing Guida

2012-12-01

169

Sediment geochemistry of Corte Madera Marsh, San Francisco Bay, California: have local inputs changed, 1830-2010?  

Science.gov (United States)

Large perturbations since the mid-1800s to the supply and source of sediment entering San Francisco Bay have disturbed natural processes for more than 150 years. Only recently have sediment inputs through the Sacramento-San Joaquin Delta (the Delta) decreased to what might be considered pre-disturbance levels. Declining sediment inputs to San Francisco Bay raise concern about continued tidal marsh accretion, particularly if sea level rise accelerates in the future. The aim of this study is to explore whether the relative amount of local-watershed sediment accumulating in a tidal marsh has changed as sediment supply from the Sacramento-San Joaquin Rivers has decreased. To address this question, sediment geochemical indicators, or signatures, in the fine fraction (silt and clay) of Sacramento River, San Joaquin River, San Francisco Bay, and Corte Madera Creek sediment were identified and applied in sediment recovered from Corte Madera Marsh, one of the few remaining natural marshes in San Francisco Bay. Total major, minor, trace, and rare earth element (REE) contents of fine sediment were determined by inductively coupled plasma mass and atomic emission spectroscopy. Fine sediment from potential source areas had the following geochemical signatures: Sacramento River sediment downstream of the confluence of the American River was characterized by enrichments in chromium, zirconium, and heavy REE; San Joaquin River sediment at Vernalis and Lathrop was characterized by enrichments in thorium and total REE content; Corte Madera Creek sediment had elevated nickel contents; and the composition of San Francisco Bay mud proximal to Corte Madera Marsh was intermediate between these sources. Most sediment geochemical signatures were relatively invariant for more than 150 years, suggesting that the composition of fine sediment in Corte Madera Marsh is not very sensitive to changes in the magnitude, timing, or source of sediment entering San Francisco Bay through the Delta. Nor does there appear to be a ubiquitous increase in the proportion of fine sediment from Corte Madera watershed accumulating in the marsh during the last 20 years when sediment inflows through the Delta have decreased to pre-disturbance levels. We conclude that a large, well-mixed reservoir, such as the transportable fine sediment pool in San Francisco Bay, is the primary source of sediment to Corte Madera Marsh, and this source buffers the marsh against changes in sediment supply from the Delta and local watersheds. This study also found that Corte Madera Marsh sediment between about 10-30 centimeters depth is highly contaminated with lead, likely a legacy of lead smelter operations near Carquinez Strait and leaded gasoline use.

Takesue, Renee K.; Jaffe, Bruce E.

2013-01-01

170

77 FR 59969 - Notice of Inventory Completion: San Francisco State University, Department of Anthropology, San...  

Science.gov (United States)

...Francisco State University, Department of Anthropology, San Francisco, CA; Correction AGENCY...Program (formerly in the Department of Anthropology). The human remains and associated...Francisco State University Department of Anthropology records. In the Federal...

2012-10-01

171

76 FR 1386 - Safety Zone; Centennial of Naval Aviation Kickoff, San Diego Bay, San Diego, CA  

Science.gov (United States)

...the Centennial of Naval Aviation Kickoff will take place in...voluntary consensus standards. Environment We have analyzed this proposed...significant effect on the human environment. A preliminary environmental...Zone; Centennial of Naval Aviation Kickoff; San Diego...

2011-01-10

172

Studies on Small-Angle Neutron Scattering (SANS) instrument  

Energy Technology Data Exchange (ETDEWEB)

This research is a sub-project of 'Neutron Beam Applications'. The purpose of this research is to test sample environment facilities of the HANARO instrument in order to prepare for its effective operation. Recently, KAERI took the initiative in utilizing the neutron beams within HANARO facility, and many scientists are interested in performing various studies using the neutron beam. As a result, it is highly recommended to carefully check the HANARO SANS instrument and to test data reproducibility by comparing SANS measurements in the HANARO and the measurements taken at other facilities such as NIST in U.S.A.. We investigated the microstructure and homopolymer distribution in a series of mixtures of PS-PI-PS triblock copolymers and deuterated PS homopolymers by using SANS. We also studied the sol-to-gel transition of aqueous solutions of PEO-PLGA-PEO triblock copolymers which are known to be strong neutron scatterers. By comparing the SANS data taken from the HANARO with those from NIST, we checked sample environment facilities of the HANARO SANS instrument and examined the reproducibility of the HANARO SANS data. Data acquisition and analysis procedure were also carefully evaluated. We acquired the data acquisition and analysis softwares and guidelines of the HANARO SANS data and sample environment based on the on site experience at the NGI SANS (8m SANS) beam line at NIST. Using both HANARO SANS and NIST NGI SANS instruments, we obtained useful information on the microstructure and homopolymer distribution in an series of mixtures of PS-PI-PS triblock copolymers and deuterated PS homopolymers. Furthermore, we analyze the gelation behavior of aqueous solutions of PEO-PLGA-PEO triblock copolymers using both HANARO SANS and NG7 SANS (30m SANS) instruments. As a result, We confirmed the correct performance of sample environment facility and the data reproducibility of the HANARO SANS instrument. 36 figs., 5 tabs. (Author)

Char, Kook Heon [Seoul National University, Seoul (Korea); Kim, Hong Doo [Kyung Hee Univ., Seoul (Korea); Kim, Eu Gene [Hongik Univ., Seoul (Korea)

2001-04-01

173

Programas sociales y bienestar social en comunidades oaxaqueñas: San Miguel Achiutla y San Ildefonso Sola  

OpenAIRE

Estudio realizado en dos comunidades del estado de Oaxaca, San Ildefonso Sola y San Miguel Achiutla, pertenecientes a la Región Sierra Sur y Mixteca respectivamente. La primera está conformada por población mestiza y la segunda por indígena mixtecos. Ambas comunidades presentan alto grado de marginación, y reflejan diversas carencias materiales que influyen negativamente en su bienestar, son comunidades pobres. Dedicados principalmente a la agricultura de subsistencia, los pobladores obt...

Mireya Carmina Cruz Aragón; Anselmo Arellanes Meixueiro

2013-01-01

174

Lick-Wilmerding School San Francisco, California.  

Science.gov (United States)

Examines the design of a new library/art facility at a San Francisco high school that complemented the school's contemporary academic program and reputation for excellence. Discusses the planning and architectural strategies and the technological and convenience additions designed to meet greater student needs. (GR)

Fang, Eric C. Y.

1997-01-01

175

UC San Diego Moores Cancer Center  

Science.gov (United States)

The University of California, San Diego (UCSD) Cancer Center was founded in 1978, the same year it received its NCI designation. In 2001, the Center achieved the status of comprehensive cancer center. The Center was later renamed the Moores Cancer Center (MCC). A new facility was opened in 2005 to consolidate cancer research and patient care under one roof.

176

San Miguel High School: Focus and Preparation  

Science.gov (United States)

The corporate internship program is a cornerstone of the education that students receive at San Miguel High School in Tucson, Arizona. Four students share one job, so each student works for a corporate partner outside of the school every fourth day. The money they earn is used to help defray the cost of their education, and the experience is…

Principal Leadership, 2010

2010-01-01

177

Simulations of the 1906 San Francisco Earthquake  

Energy Technology Data Exchange (ETDEWEB)

Simulations of the Great 1906 San Francisco earthquake are being performed as part of the event's centenary. LLNL is participating in a large effort to study this event and possible consequences if the event were to happen today. This document is meant to describe our efforts to others participating in the project.

Rodgers, A; Petersson, A; Tkalcic, H

2005-12-16

178

Physics festival brightens rainy san jose.  

Science.gov (United States)

A week after floodwaters surged through parts of San Jose's downtown, a flood tide of physicists-almost 6000 of them-appeared for the annual March meeting of the American Physical Society (APS). Gloom and drizzle continued for the first 4 days of the gathering, but there were plenty of bright spots inside the hall. PMID:17755225

Travis, J

1995-04-01

179

San Antonio, Texas: Solar in Action (Brochure)  

Energy Technology Data Exchange (ETDEWEB)

This brochure provides an overview of the challenges and successes of San Antonio, TX, a 2008 Solar America City awardee, on the path toward becoming a solar-powered community. Accomplishments, case studies, key lessons learned, and local resource information are given.

2011-10-01

180

SAN PEDRO VEGETATION MAP GRID DATA  

Science.gov (United States)

This data set is a digital vegetation map of the San Pedro Riparian National Conservation Area and Babocomari River. The map was produced by manual interpretation of true-color, stereo aerial photography flown in November 2000. Standard U.S. Geological Survey Digital Orthophoto...

181

SAN PEDRO VEGETATION MAP VECTOR DATA  

Science.gov (United States)

This data set is a digital vegetation map of the San Pedro Riparian National Conservation Area and Babocomari River. The map was produced by manual interpretation of true-color, stereo aerial photography flown in November 2000. Standard U.S. Geological Survey Digital Orthophoto...

182

San Jose, California: Solar in Action (Brochure)  

Energy Technology Data Exchange (ETDEWEB)

This brochure provides an overview of the challenges and successes of San Jose, CA, a 2008 Solar America City awardee, on the path toward becoming a solar-powered community. Accomplishments, case studies, key lessons learned, and local resource information are given.

2011-10-01

183

ASTER Images San Francisco Bay Area  

Science.gov (United States)

This image of the San Francisco Bay region was acquired on March 3, 2000 by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA's Terra satellite. With its 14 spectral bands from the visible to the thermal infrared wavelength region, and its high spatial resolution of 15 to 90 meters about 50 to 300 feet ), ASTER will image Earth for the next 6 years to map and monitor the changing surface of our planet.Image: This image covers an area 60 kilometers (37 miles) wide and 75 kilometers (47 miles) long in three bands of the reflected visible and infrared wavelength region. The combination of bands portrays vegetation in red, and urban areas in gray. Sediment in the Suisun Bay, San Pablo Bay, San Francisco Bay, and the Pacific Ocean shows up as lighter shades of blue. Along the west coast of the San Francisco Peninsula, strong surf can be seen as a white fringe along the shoreline. A powerful rip tide is visible extending westward from Daly City into the Pacific Ocean. In the lower right corner, the wetlands of the South San Francisco Bay National Wildlife Refuge appear as large dark blue and brown polygons. The high spatial resolution of ASTER allows fine detail to be observed in the scene. The main bridges of the area (San Mateo, San Francisco-Oakland Bay, Golden Gate, Richmond-San Rafael, Benicia-Martinez, and Carquinez) are easily picked out, connecting the different communities in the Bay area. Shadows of the towers along the Bay Bridge can be seen over the adjacent bay water. With enlargement the entire road network can be easily mapped; individual buildings are visible, including the shadows of the high-rises in downtown San Francisco.Inset: This enlargement of the San Francisco Airport highlights the high spatial resolution of ASTER. With further enlargement and careful examination, airplanes can be seen at the terminals.Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is one of five Earth-observing instruments launched December 18, 1999, on NASA's Terra satellite. The instrument was built by Japan's Ministry of International Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and the data products. Dr. Anne Kahle at NASA's Jet Propulsion Laboratory, Pasadena, California, is the U.S. Science team leader; Moshe Pniel of JPL is the project manager. ASTER is the only high resolution imaging sensor on Terra. The primary goal of the ASTER mission is to obtain high-resolution image data in 14 channels over the entire land surface, as well as black and white stereo images. With revisit time of between 4 and 16 days, ASTER will provide the capability for repeat coverage of changing areas on Earth's surface.The broad spectral coverage and high spectral resolution of ASTER will provide scientists in numerous disciplines with critical information for surface mapping, and monitoring dynamic conditions and temporal change. Example applications are: monitoring glacial advances and retreats; monitoring potentially active volcanoes; identifying crop stress; determining cloud morphology and physical properties; wetlands evaluation; thermal pollution monitoring; coral reef degradation; surface temperature mapping of soils and geology; and measuring surface heat balance.

2000-01-01

184

Geomorphic Controls on Riparian Vegetation Along the San Miguel River, Colorado  

Science.gov (United States)

Riparian vegetation is strongly influenced by geomorphic processes that typically vary in the downstream direction. We combined hydraulic and hydrologic analysis with mapping of plant communities and geomorphic surfaces to characterize downstream changes in the relation between fluvial processes and patterns of woody vegetation along the relatively unregulated San Miguel River in western Colorado, USA. We used direct gradient analysis to relate the occurrence of riparian plan communities to the gradient of inundation frequency. All riparian vegetation along 58 river kilometers of the San Miguel River was mapped into relatively uniform polygons of thirteen different plant community groups. The height of each community occurrence above the active channel shelf was converted to inundating discharge using a one-dimensional step-backwater model calibrated for four representative reaches of the river. Inundating discharge was converted to inundation frequency using a set of flood frequency curves (Log-Pearson Type III) developed from five stream gaging stations along the San Miguel River and its tributaries. Riparian plant communities are tightly arrayed along the gradient of inundation frequency, a reflection of the importance of fluvial disturbance and water subsidy to riparian plants. Almost all of the area occupied by sandbar willow occurs on surfaces inundated at least 47 percent of years. In contrast, communities dominated by blue spruce were most abundant on surfaces inundated in one to two percent of years. The importance of river flooding to the riparian vegetation increases downstream. Along the lower San Miguel River, 95 percent of the riparian vegetation is on surfaces inundated by the river in the last 150 years. Upstream in the South Fork San Miguel River, only 55 percent of the riparian vegetation is on surfaces inundated by the river in the last 150 years. This trend reflects the lower drought stress along upstream reaches, as well as the importance of disturbance from hill slope processes such as landslides, debris flows, and beaver dams on tributaries.

Andrews, E. D.; Friedman, J. M.; Kittel, G. M.; Madole, R. F.; Auble, G. T.

2001-12-01

185

Lithosphere-asthenosphere interactions near the San Andreas fault  

Science.gov (United States)

We decipher the strain history of the upper mantle in California through the comparison of the long-term finite strain field in the mantle and the surface strain-rate field, respectively inferred from fast polarization directions of seismic phases (SKS and SKKS), and Global Positioning System (GPS) surface velocity fields. We show that mantle strain and surface strain-rate fields are consistent in the vicinity of San Andreas Fault (SAF) in California. Such an agreement suggests that the lithosphere and strong asthenosphere have been deformed coherently and steadily since >1 Ma. We find that the crustal stress field rotates (up to 40° of rotation across a 50 km distance from 50° relative to the strike of the SAF, in the near-field of SAF) from San Francisco to the Central Valley. Both observations suggest that the SAF extends to depth, likely through the entire lithosphere. From Central Valley towards the Basin and Range, the orientations of GPS strain-rates, shear wave splitting measurements and seismic stress fields diverge indicating reduced coupling or/and shallow crustal extension and/or presence of frozen anisotropy.

Chamberlain, C. J.; Houlié, N.; Bentham, H. L. M.; Stern, T. A.

2014-08-01

186

Nondestructive testing of high-temperature alloys by small angle neutron scattering (SANS); Zerstoerungsfreie Werkstoffpruefung hochwarmfester Legierungen mit Hilfe der Neutronenkleinwinkelstreuung (SANS)  

Energy Technology Data Exchange (ETDEWEB)

The suitability of the Small Angle Neutron Scattering (SANS) technique for the measurement of microstructural parameters of high-temperature alloys has been studied. The aim was the non-destructive determination of the creep damage for the estimation of the residual lifetime of service loaded gas turbine blades. In the first step the quantitative correlation between the SANS Signal and the microstructure of the material has been investigated using two oxide dispersion strengthened (ODS) alloys of simple microstructure. The size distributions of the dispersoid in the as-received alloy and the thermally induced growth of the dispersoid have been measured. Good agreement with results of transmission electron microscopy examinations was found. Subsequently the relationship between the SNS signal and the strain of a typical, creep loaded, {gamma}`-strengthened Ni-base superalloy has been investigated. In a series of creep specimens made from the cast superalloy IN100, systematically increasing amounts of creep strain have been produced. With these specimens two parameters can be derived from the SANS scattering curve, each pair of values having a clear relationship with the creep strain. A hypothesis is discussed concerning the related scattering mechanism. (orig.). [Deutsch] Untersucht wird die Eignung der Neutronenkleinwinkelstreuung (SANS) zur Bestimmung des Gefueges hochwarmfester Legierungen. Das Ziel ist die zerstoerungsfreie Messung einer Kriechschaedigung des Werkstoffs und damit die Ermittlung der Restlebensdauer hochbelasteter Gasturbinenschaufeln. Im ersten Schritt wurde die quantitative Korrelierbarkeit des SANS-Streusignals mit dem Werkstoffgefuege an zwei einfach aufgebauten, oxiddispersiv verfestigten (ODS-)Legierungen ueberprueft. Hier wurden die Groessenverteilungen der Dispersoide im Ausgangszustand der Legierungen und das thermische Wachstum der Dispersoide gemessen. Es wurde eine gute Uebereinstimmung mit Ergebnissen von TEM-Untersuchungen festgestellt. Anschliessend wurde an einer typischen {gamma}`-verfestigten Ni-Basis Superlegierung getestet, ob ein Zusammenhang zwischen dem SANS-Signal und der verbrauchten Lebensdauer zeitstandbelasteter Proben existiert. Es wurden Zeitstandproben aus der Feinguss-Superlegierung IN100, die fuer Flugzeug-Gasturbinenschaufeln verwendet wird, hergestellt und in Zeitstandversuchen bis zu systematisch abgestuften Kriechdehnungen und damit abgestuften Erschoepfungsgraden der Lebensdauer belastet. Es wird gezeigt, dass sich aus den SANS-Streukurven dieser Proben zwei Parameter definieren lassen, deren Wertepaar eindeutig zur Kriechdehnung korreliert ist. Ueber den zugrundeliegenden Streumechanismus wird eine Hypothese diskutiert. (orig.).

Widera, M.T.; Krautwasser, P.; Schuster, H.; Nickel, H.

1992-11-01

187

Does the West Salton Detachment extend through San Gorgonio Pass, southern California?  

Science.gov (United States)

Rift-related extension and low-angle crustal detachment are key structural elements of the late Cenozoic southern San Andreas Fault system, as manifested by the West Salton Detachment (WSD). The most northwestern exposure of the WSD is in the Santa Rosa Mts (SRM), where the Zosel Fault bottoms a hangingwall sequence of upper Cenozoic marine and terrestrial sedimentary deposits that include stratigraphic units well known throughout the Salton Trough region. We have used geologic and geophysical data to investigate the distribution of the WSD system in the northern Salton Trough, including its possible extension into and beyond San Gorgonio Pass. Although the WSD is not exposed north of the SRM, late Miocene marine and terrigenous sedimentary rocks at Garnet Hill probably are hangingwall deposits squeezed up within the San Andreas Fault zone. West of Garnet Hill lie San Gorgonio Pass (SGP) and the 3 km-high northern escarpment of the San Jacinto Mountains (SJM). In SGP, upper Cenozoic sedimentary rocks south of the Banning strand of the San Gabriel Fault include the marine Imperial Formation and associated terrestrial deposits, a sequence similar to that in the WSD hangingwall throughout the greater Salton Trough region. We propose that the WSD originally extended from the NW head of Coachella Valley west into SGP, where the detachment may form the base of the Cenozoic marine and terrestrial sedimentary sequence. The WSD probably continues west beyond SGP, with extensional translation decreasing until the detachment intersects the Banning Fault near Calimesa. There, we propose that the WSD underlies a subsurface sedimentary package north of the San Timoteo badlands and south of the Banning Fault that a gravity low suggests is 2 km thick, and that reportedly contains marine sediment penetrated in boreholes. When ~44 km of right-slip is restored on the Banning Fault (Matti and Morton, 1993), the Calimesa low restores opposite a similar low in the northwestern Coachella Valley. The juxtaposed gravity lows mark a late Cenozoic depocenter that formed at the NW head of the Salton Trough during evolution of the San Gabriel and San Andreas Faults (10 Ma to 1.2 Ma). This reconstruction has several implications: (1) the WSD was active while the late Cenozoic sedimentary sequence in SGP accumulated in its hangingwall at 7 Ma (marine Imperial Fm) and probably as early as 10 Ma (Hathaway Fm); (2) At that time the San Jacinto Mts (SJM) began to rise in the WSD footwall, shedding sediment and landslide breccia into the SGP basin. Simultaneously, Transverse Ranges sources shed sediment southwest, south, and southeast into the SGP basin and the adjoining San Timoteo basin; (3) Prior to disruption by right-slip on the Banning Fault, the WSD probably extended around the NW head of the Salton Trough, where the detachment would have separated footwall crystalline rocks of SGP from hangingwall deposits of the Salton Trough (Coachella Fanglomerate, Imperial and Painted Hill fms). The enigmatic Whitewater Fault in the SE San Bernardino Mts may be part of the WSD. (4) Because extensional translation on the WSD diminished westward through SGP, it is doubtful that >3 km of topographic relief on the WSD footwall in the SJM resulted from footwall uplift alone during the period 10 Ma to 1.2 Ma. Post-WSD Quaternary uplift must account for an unknown component of this relief.

Matti, J. C.; Langenheim, V. E.

2008-12-01

188

Diatomeas potencialmente nocivas del Golfo San Matías (Argentina) / Potentially harmful diatoms from the San Matías Gulf (Argentina)  

Scientific Electronic Library Online (English)

Full Text Available SciELO Chile | Language: Spanish Abstract in spanish RESUMEN Este trabajo tuvo como objetivo estudiar las diatomeas presentes en las aguas costeras del área norte del Golfo San Matías (Provincia de Río Negro, Argentina) que han sido citadas como productoras de eventos nocivos en otras áreas geográficas. El material fue recolectado en dos estaciones de [...] muestreo: Las Grutas y Piedras Coloradas, relacionadas con bancos naturales y cultivo de bivalvos respectivamente. Dos taxa potencialmente toxígenos y 18 taxa nocivos no toxígenos fueron hallados. A pesar de que algunos de ellos fueron ocasionalmente abundantes en el plancton del área, ninguno produjo discoloraciones evidentes ni se detectó que hubieran causado efectos nocivos durante el período de estudio. Abstract in english ABSTRACT Diatoms responsible for harmful events in other geographic areas, found in the coastal waters of the San Matías Gulf (Río Negro Province, Argentina), were studied. Materials were collected in two sampling stations related to natural banks and cultures of bivalves: Las Grutas and Piedras Col [...] oradas. Two potentially toxigenic taxa and 18 harmful non toxigenic taxa were found. Despite that some of these taxa were occasionally abundant in the plankton of the area, none of them caused evident discolorations or detectable harmful effects during the study period.

Inés, Sunesen; Alejandra, Bárcena; Eugenia A, Sar.

2009-04-01

189

SAFOD Penetrates the San Andreas Fault  

Directory of Open Access Journals (Sweden)

Full Text Available SAFOD, the San Andreas Fault Observatory at Depth (Fig. 1, completed an important milestone in July 2005 by drilling through the San Andreas Fault at seismogenic depth. SAFOD is one of three major components of EarthScope, a U.S. National Science Foundation (NSF initiative being conducted in collaboration with the U.S. Geological Survey (USGS. The International Continental Scientific DrillingProgram (ICDP provides engineering and technical support for the project as well as online access to project data and information (http://www.icdp-online.de/sites/sanandreas/news/news1.html. In 2002, the ICDP, the NSF, and the USGS provided funding for a pilot hole project at the SAFOD site. Twenty scientifi c papers summarizing the results of the pilot hole project as well as pre-SAFOD site characterization studies were published in Geophysical Research Letters (Vol.31, Nos. 12 and 15, 2004.

Mark D. Zoback

2006-03-01

190

San Cristobal Galapagos wind power project  

Energy Technology Data Exchange (ETDEWEB)

The San Cristobal Galapagos wind power project was described. With its unique endemic flora and fauna, the Galapagos Islands were declared a world heritage site and marine reserve. The San Cristobal wind project was initiated in 1999 to reduce the environmental impacts of energy use on the island, and has been operational since 2007. Three 800 kW wind turbines have been installed in order to reduce 52 per cent of the island's diesel generation. The project's high penetration wind-diesel hybrid system included 300 kW diesel generators, a 13.2 kV utility distribution system, and six 300 kW wind turbines. The project is located outside of Galapagos Petrel flight paths and nesting areas. Turbines from a factory in Spain were used. The wind turbine foundation was constructed from concrete sand and stone mined on the island. Photographs of the installation process were included. tabs., figs.

Tolan, J. [Sgurr Energy, Glasgow (United Kingdom)

2009-07-01

191

SANS-1 Experimental reports of 2000  

International Nuclear Information System (INIS)

The instrument SANS-1 at the Geesthacht neutron facility GeNF was used for scattering experiments in 2000 at 196 of 200 days of reactor and cold source operation. The utilisation was shared between the in-house R and D program and user groups from different universities and research centers. These measurements were performed and analysed either by guest scientists or GKSS staff. The focus of the work in 2000 at the experiment SANS-1 was the structural investigation of hydrogen containing substances such as biological macromolecules (ribosomes, protein-RNA-complexes, protein solutions, glycolipids and membranes), molecules which are important in the fields of environmental research (refractoric organic substances) and technical chemistry (surfactants, micelles). (orig.)

192

San Rafael mining and fabrication complex today  

International Nuclear Information System (INIS)

In Mendoza province, 35 km West San Rafael city, is located a CNEA installation for uranium ore extraction and concentration: the San Rafael Mining and Fabrication Complex. By the middle of the nineties, as a consequence of the very low prices of uranium concentrate in the international market and of the high internal production costs, uranium extraction was stopped. To day, the international price of the concentrate had a very important increase and the Government has decided the completion of the Atucha II Nuclear Power Station construction. Moreover, studies have been started for new nuclear power plants. In such circumstances the reactivation of the Complex will make sure the uranium supply for our nuclear power stations, contributing to the improvement of the energy generation mix in our country. (author)

193

A fatal irradiator accident in San Salvador  

International Nuclear Information System (INIS)

A summary is given of a radiation accident involving personnel at an industrial irradiation facility for sterilising pre-packaged medical products in San Salvador. The medical treatment of the personnel is briefly described. The past accident review highlighted the fact that the accident is a classic example of what can happen, even to a plant with initially good safety features, when it is operated without the benefits of a supporting radiological protection infrastructure or any regulatory control. (U.K.)

194

San Francisco Bay Area Regional Database (BARD)  

Science.gov (United States)

This database contains an extensive selection of digital data and imagery of the San Francisco Bay Area. Products include Digital Elevation Models (DEMs), Digital Line Graphs (DLGs), Digital Raster Graphics (DRGs), Digital Orthophotos (DOQs), and historical maps. Most of these items are available at a scale of 1:24,000; other scales are available for some. Metadata and links to documents outlining mapping standards for each category of digital product are provided.

195

Pharyngoamygdalitis treatment in San Luis City, Argentina  

OpenAIRE

The aim of this research was to determine and compare the distribution by sex and age of pharyngoamygdalitis cases and analyze quantitatively and qualitatively the applied treatments in Hospitals A (HA) and B (HB) of San Luis city, Argentina. An observational, descriptive, transversal and indication-prescription’s study was carried out. Diagnoses and drugs were classified and the prescriptions were analyzed. Amoxicillin in HA and penicillin G benzathine in HB were mainly prescribed. Antihis...

Pauw, Mari?a C.; Panini, Alicia; Rapisarda, Ana M. P.; Valsecia, Mabel E.; Caldero?n, Claudia P.

2012-01-01

196

San Bernardino National Wildlife Refuge Well 10  

Energy Technology Data Exchange (ETDEWEB)

The U.S. Geological Survey (USGS), at the request of the U.S. Fish and Wildlife Service, evaluated the water production capacity of an artesian well in the San Bernardino National Wildlife Refuge, Arizona. Water from the well initially flows into a pond containing three federally threatened or endangered fish species, and water from this pond feeds an adjacent pond/wetland containing an endangered plant species.

Ensminger, J.T.; Easterly, C.E.; Ketelle, R.H.; Quarles, H.; Wade, M.C.

1999-12-01

197

SANS studies of liquid crystalline microemulsion gels  

OpenAIRE

We have investigated by small-angle neutron scattering (SANS) the ternary system containing water, alkane and the surfactant mixture benzyltetradecyldimethylammonium chloride and tetradecyltrimethylammonium bromide, which we have found to form a cubic liquid crystalline phase. A contrast variation experiment with equal volume fractions of water and oil showed three Bragg reflections varying in agreement with theoretically calculated scattering amplitudes for an infinite periodic minimal surfa...

Ra?dler, Joachim O.; Radiman, S.; Vallera, A.; Toprakcioglu, C.

1989-01-01

198

Moving Towards SAN Storage: An Enterprise Perspective  

OpenAIRE

Abstract – One of the major components of any enterprise IT infrastructure is data storage. There has been continuous effort to explore new storage technologies to improve performance with respect to input/output operations, data availability, consolidation of storage assets and data protection and archiving. Storage has moved from the traditional Direct Attached Storage (DAS) to Network Attached Storage (NAS) and now to Storage Area Networks (SAN). Traditional storage subsystems like Serve...

rabi prasad padhy

2012-01-01

199

Modèle Fluide de Réseaux Sans Fils  

OpenAIRE

Nous proposons un modèle fluide spatial de réseau qui permet d'établir une expression analytique simple d'une caractéristique des réseaux sans fils, le facteur d' interférence downlink . L'approche que nous développons est utile dans un grand nombre de problèmes liés aux réseaux cellulaires, notamment dans le cadre du dimensionnement de réseaux. Elle simplifie considérabement la complexité de l'analyse nécessaire à l'établissement de résultats précis. L'hypothèse sur laquel...

Kelif, Jean-marc

2008-01-01

200

Polychlorinated biphenyls (PCBs) in San Francisco Bay.  

Science.gov (United States)

San Francisco Bay is facing a legacy of polychlorinated biphenyls (PCBs) spread widely across the land surface of the watershed, mixed deep into the sediment of the Bay, and contaminating the Bay food web to a degree that poses health risks to humans and wildlife. In response to this persistent problem, water quality managers are establishing a PCB total maximum daily load (TMDL) and implementation plan to accelerate the recovery of the Bay from decades of PCB contamination. This article provides a review of progress made over the past 15 years in managing PCBs and understanding their sources, pathways, fate, and effects in the Bay, and highlights remaining information needs that should be addressed in the next 10 years. The phaseout of PCBs during the 1970s and the 1979 federal ban on sale and production led to gradual declines from the 1970s to the present. However, 25 years after the ban, PCB concentrations in some Bay sport fish today are still more than ten times higher than the threshold of concern for human health. Without further management action it appears that the general recovery of the Bay from PCB contamination will take many more decades. PCB concentrations in sport fish were, along with mercury, a primary cause of a consumption advisory for the Bay and the consequent classification of the Bay as an impaired water body. Several sources of information indicate that PCB concentrations in the Bay may also be high enough to adversely affect wildlife, including rare and endangered species. The greater than 90% reduction in food web contamination needed to meet the targets for protection of human health would likely also generally eliminate risks to wildlife. PCB contamination in the Bay is primarily associated with industrial areas along the shoreline and in local watersheds. Strong spatial gradients in PCB concentrations persist decades after the release of these chemicals to Bay Area waterways. Through the TMDL process, attention is being more sharply focused on the PCB sources that are controllable and contributing most to PCB impairment in the Bay. Urban runoff from local watersheds is a particularly significant pathway for PCB entry into the Bay. Significant loads also enter the Bay through Delta outflow (riverine input). Recent studies have shown that erosion of buried sediment is occurring in large regions of the Bay, posing a significant problem with respect to recovery of the Bay from PCB contamination because the sediments being eroded and remobilized are from relatively contaminated buried sediment deposits. In-Bay contaminated sites are likely also a major contributor of PCBs to the Bay food web. Dredged material disposal, wastewater effluent, and atmospheric deposition are relatively minor pathways for PCB loading to the Bay. Priority information needs at present relate to understanding the sources, magnitude of loads, and effectiveness of management options for urban runoff; the regional influence of in-Bay contaminated sites; remobilization of PCBs from buried sediment; historic and present trends; in situ degradation rates of PCBs; reliable recovery forecasts under different management scenarios; the spatial distribution of PCBs in soils and sediments; and the biological effects of PCBs in interaction with other stressors. The slow release of pollutants from the watershed and the slow response of the Bay to changes in inputs combine to make this ecosystem very slow to recover from pollution of the watershed. The history of PCB contamination in the Bay underscores the importance of preventing persistent, particle-associated pollutants from entering this sensitive ecosystem. PMID:17451673

Davis, J A; Hetzel, F; Oram, J J; McKee, L J

2007-09-01

201

Morphological evolution in the San Francisco Bight  

Science.gov (United States)

San Francisco Bight, located near the coast of San Francisco, USA, is an extremely dynamic tidal inlet environmental subject to large waves and strong currents. Wave heights coming from the Pacific Ocean commonly exceed 5 m during winter storms. During peak flow tidal currents approach 3 m/s at the Golden Gate, a 1 km wide entrance that connects San Francisco Bay to the Pacific Ocean. Flow structure in this region varies markedly spatially and temporally due to the complex interaction by wind, waves and tidal currents. A multibeam sonar survey was recently completed that mapped in high resolution, for the first time, the bottom morphology in the region of the ebb tidal delta. This data set includes a giant sand wave field covering an area of approximately 4 square kilometers. The new survey enables the calculation of seabed change that has occurred in the past 50 years, since the last comprehensive survey of the area was completed. This comparison indicates an average erosion of 60 centimeters which equates to a total volume change of approximately 9.3 x 107 m3. Morphologic change also indicates that flood channels have filled and that the entire ebb delta is contracting radially.

Hanes, Daniel M.; Barnard, Patrick L.

2007-01-01

202

Plaza Sarmiento: San Fernando, Argentina  

Directory of Open Access Journals (Sweden)

Full Text Available Los espacios públicos tienen la misión de satisfacer diferentes roles, tales como dar lugar al esparcimiento, al juego infantil e imprimir carácter cívico a un lugar. Sin embargo también abren la posibilidad de ser sutura en sitios no completamente despejados. Esto es aprovechado, generando espacios semipúblicos y públicos en relación a los medianeros existentes.Public spaces have the mission of satisfying various roles, such as giving place for recreation, children's play and give civic character. However, they also open the possibility of becoming a suture in sites that are not completely clear. This can be opportunistic, generating semi-public and public spaces in relation to the existing walls.

Ignacio Montaldo

2010-04-01

203

SANS study of hydrophobic effects on pressure-induced micro- and macrophase separations of block copolymers  

International Nuclear Information System (INIS)

Hydrophobic effects on pressure-induced microphase separation of block copolymers were investigated by using small-angle neutron scattering (SANS). A block copolymer, pEOEOVE-b-pMOVE aqueous solution, which shows LCSTs (at 40 and 60 deg. C, for pEOEOVE and pMOVE homopolymers, respectively) was used. A phase diagram was obtained by tracing light-transmittance at 632.8nm by increasing temperature (T) at various pressures (P), which was a convex-upward function. The change in the slope of the phase boundary curve could be explained by volume change associated with mixing as well as 'iceberg' formation. SANS revealed that a microphase separation took place by pressurizing or increasing temperature. At 28 deg. C, the correlation length was observed to show continuous increase with divergence at 350MPa. This result showed that the block copolymers at 28 deg. C underwent macrophase separation and the transition was a second-order transition. At 45 deg. C, under atmospheric pressure, the SANS curve suggested formation of a BCC lattice structure with micelles composed of a central core of pEOEOVE. By pressurizing, the SANS peak related to the microphase separation disappeared, meaning dissolution of block copolymers. However, by further pressurizing, another peak re-appeared at 250MPa. This peak indicates the microphase separation of block copolymers is different from those observed under low pressures

204

Faulting caused by groundwater level declines, San Joaquin Valley, California.  

Science.gov (United States)

Approximately 230mm of aseismic vertical offset of the land surface across the Pond-Poso Creek fault in the San Joaquin Valley, California, probably is related to groundwater withdrawal for crop irrigation. The scarp is approximately 3.4km long and occurs in an area where the land subsided more than 1.5m from 1926 to 1970. Modern faulting postdates the beginning of water level declines and associated subsidence. Movement detected by precise leveling surveys from February 1977 to March 1979 was seasonal, occurring during periods of water level decline. The modern movement probably is caused by localized differential compaction induced by differential water level declines across the preexisting fault. -Author

Holzer, T.L.

1980-01-01

205

Evangelical Churches and Conservation in San Pacho, Darién (Colombian Caribbean  

Directory of Open Access Journals (Sweden)

Full Text Available The locality of San Francisco de Asís (Acandí, Chocó overlooking the Caribbean Sea, is a well-known headquarter for actions related to environmental protection, thanks to the work of organization and individuals that try to alleviate the global environmental crisis. The great expansion of the evangelical movement among populations that formerly were catholic puts these new local churches in a position of social actors that can contribute to the conservation projects of marine life and forests. Although there is no organic link between the conservationist movement and evangelical churches, analyzinga shared experience in the journeys of protecting marine turtles, we see how the topic gains relevance for the religious organizations, according to the ethnography realized between 2008 and 2009. Thus, religious believes cease to be contrasts to the norm, to set themselves up as dependent orientations within the context in which they operate.

Aída Gálvez; Julio Salazar; Lorena Ramírez

2009-07-01

206

Precursory Diffuse CO2 Emission Signature of the January 2002 Short-term Unrest at San Miguel Volcano, El Salvador, Central America  

Science.gov (United States)

San Miguel is one of the most active volcanoes in El Salvador and rises from near sea level to 2,132 meters. San Miguel has erupted at least 29 times since 1699 and its historical eruptions consisted mainly of relatively quiescent emplacement of lava flows or minor explosions that produced modest tephra falls (Mayer-Abich, 1956). In January 2002 a short-term volcanic unrest characterized by a gas-and-steam plume containing a little ash rising with a mushroom-like profile a few hundred meters above the summit crater occurred at San Miguel volcano (BGVN 27:02, 2002). In addition, an anomalous microseismicity pattern, about 75 events between 7:30 and 10:30 hours, was also observed on January 16, 2002. This style of increased seismicity and gas emission is within the range of normal activity at San Miguel according to SNET, since intermittent periods of vigorous steam-and-gas emission have been commonly reported in recent years (BGVN 27:02, 2002). Continuous geochemical monitoring of diffuse CO2 degassing is performed on the eastern flank of San Miguel volcano since November 24, 2001, to provide a multidisciplinary approach for San Miguel's volcanic surveillance program. At the observation site, the background mean of the diffuse CO2 emission rate is about 16 gm-2d-1, but a 17-fold increase, up to 270 gm-2d-1, was detected on January 7, nine days before the January 2002 short-term unrest at San Miguel. This observed anomalous changes on diffuse CO2 degassing rate might be related to a sharp increase of CO2 pressure within the volcanic-hydrothermal system of San Miguel since meteorological fluctuations cannot explain this observed significant increase of diffuse CO2 emission nine days before the short-term unrest at San Miguel volcano on January 16, 2002.

Cartagena, R.; Pérez, N.; Salazar, J.; Olmos, R.; Barahona, F.; Soriano, T.; Padrón, E.; Lima, R.; Melián, G.; Hernández, P.; López, D.

2002-12-01

207

Development of 40m SANS and Its Utilization Techniques  

International Nuclear Information System (INIS)

Small angle neutron scattering (SANS) has been a very powerful tool to study nanoscale (1-100 nm) bulk structures in various materials such as polymer, self assembled materials, nano-porous materials, nano-magnetic materials, metal and ceramics. Understanding the importance of the SANS instrument, the 8m SANS instrument was installed at the CN beam port of HANARO in 2001. However, without having a cold neutron source, the beam intensity is fairly low and the Q-range is rather limited due to short instrument length. In July 1, 2003, therefore, the HANARO cold neutron research facility project was launched and a state of the art 40m SANS instrument was selected as top-priority instrument. The development of the 40m SANS instrument was completed as a joint project between Korea Advanced Institute of Science and Technology and the HANARO in 2010. Here, we report the specification of a state of art 40m SANS instrument at HANARO

208

Agriculture, irrigation, and drainage on the west side of the San Joaquin Valley, California: Unified perspective on hydrogeology, geochemistry and management  

Energy Technology Data Exchange (ETDEWEB)

The purpose of this report is to provide a broad understanding of water-related issues of agriculture and drainage on the west side of the San Joaquin Valley. To this end, an attempt is made to review available literature on land and water resources of the San Joaquin Valley and to generate a process-oriented framework within which the various physical-, chemical-, biological- and economic components of the system and their interactions are placed in mutual perspective.

Narasimhan, T.N.; Quinn, N.W.T.

1996-03-01

209

Perspectives of San Juan healthcare practitioners on the detection deficit in oral premalignant and early cancers in Puerto Rico: a qualitative research study  

OpenAIRE

Abstract Background In Puerto Rico, relative to the United States, a disparity exists in detecting oral precancers and early cancers. To identify factors leading to the deficit in early detection, we obtained the perspectives of San Juan healthcare practitioners whose practice could be involved in the detection of such oral lesions. Methods Key informant (KI) interviews were conducted with ten clinicians practicing in or around San Juan, Puerto Rico. We then tri...

Baek Linda S; Vélez Himilce; Buxó Carmen J; Psoter Walter J; Vélez Vega Carmen M; Morse Douglas E; Elias Augusto; Ayendez Melba

2011-01-01

210

Integrating geology and geomorphology; the key to unlocking Quaternary tectonic framework of the San Andreas Fault zone in the San Gorgonio Pass region, southern California  

Science.gov (United States)

The San Gorgonio Pass (SGP) region of southern California is a locus of long-continued Quaternary deformation and landscape evolution within a structural complexity, colloquially referred to as a knot in the San Andreas Fault (SAF) zone. The geomorphology of the SGP region reflects the complex history of geologic events involved in the formation and resolution of this structural knot. We recognize five morphologically distinct terrains in and around SGP; the San Gorgonio Block (SGB), Yucaipa Ridge (YRB), Pisgah Peak (PPB), Kitching Peak (KPB), and Devil's Garden blocks (DGB). Morphometric analyses, including drainage density, hypsometry, topographic profiles, and stream-power measurements and discontinuities, consistently demonstrate distinctions between the blocks. Our focus in this study is on the KPB and PPB terrains, both developed in crystalline rocks of San Gabriel Mountains type. KPB is bounded on the north by the Mission Creek strand of the SAF and on the east by the Whitewater Fault; PPB is bounded on the north by the San Bernardino strand of the SAF, which continues southeastward into the core of SGP and there separates PPB from KPB. KPB has significantly greater topographic relief than PPB, and the two blocks have internal morphometric and geologic characteristics that differ significantly. Canyons in KPB lack thick Quaternary alluvial fills, and hillslopes have shed numerous bedrock landslides. Canyons in PPB contain large volumes of Middle-Pleistocene through Holocene alluvium, associated with areally extensive relict geomorphic surfaces. We use the geomorphic differences, along with geologic factors, to reconstruct tectonically driven landscape evolution over the last 100-200 Ka years. The KPB and PPB both are bounded southward by contractional structures of the San Gorgonio Pass Fault zone (SGPFZ), but geologic complexity within this zone differs markedly south of each block. South of KPB, the SGPFZ consists of multiple thrust-fault strands, some older than 500 ka, has a wide spatial footprint along a N-S axis, and Holocene alluvium is disrupted by numerous fault scarps. By contrast, south of PPB the SGPFZ consists of fewer thrust-fault strands, has a relatively narrow footprint, and faults breaking Holocene deposits are uncommon. The San Bernardino strand of the SAF intersects the SGPFZ at about the boundary between these two domains. Morphometric data indicate that the KPB has undergone significantly greater uplift than the PPB since inception of the San Bernardino strand, proposed by Matti and Morton (1993) to have occurred at ~125ka. Age estimates associated with the PPB and DGB allow us to broadly estimate relative uplift rates. Drainage reconstruction of the Whitewater River and its tributaries across the YRB likewise allow us to validate and refine the uplift estimated by Spotila and others (2001). YRB has been uplifted relative to SGB since the inception of the Mill Creek Strand of the SAF.

Kendrick, K. J.; Matti, J. C.

2012-12-01

211

Sans study of asphaltene aggregation  

International Nuclear Information System (INIS)

The colloidal properties of asphaltenes have long been recognized from peculiarities in their solubility and colligative properties. A layered micellar model or asphaltenes was proposed by others in which a highly condensed alkyl aromatic formed the central part, and molecules of decreasingly aromatic character (resins) clustered around them. Numerous studies, based on a variety of techniques such as ultracentrifugation and electron microscopy indicated a particulate nature for asphaltenes with size 20-40 A diameter. Others have proposed a refined model based on x-ray diffraction and small angle scattering. In this model, interactions between flat sheets of condensed aromatic rings form the central ''crystallite'' part of a spherical particle with the outer part being comprised of the aliphatic positions of the same molecules. These particles are bunched together with some degree of entanglement into ''micelles''. Concentration and solvent dependent radii of gyration, ranging from 30-50 A were reported. The aggregation creates a good deal of uncertainty as to the true molecular size or weight of asphaltenes. Neutron scattering offers novel contrast relative to light scattering (refractive index) and x-ray scattering (electron density). This is because the scattering length of proton is negative, whereas that from deuterium and other nuclei such as C, S, O, and N are positive. Thus by replacing hydrogen with deuterium in either the solvent or the scatterer the contrast the solvent or the scatterer the contrast can be varied, and different parts of the molecule can be highlighted

212

USGS: Potential San Francisco Bay Landslides during El Niño  

Science.gov (United States)

As a result of the 1997-98 El Niño season, the US Geological Survey (USGS) worked with the National Weather Service and the State Office of Emergency Services to create the San Francisco Bay Region Landslide Folio. This Web site includes samples of the Landslide and Debris-Flow maps that can be found in the Landslide Folio as well as links to the six separate-but-related reports. For background information, the site includes maps and statistics related to the debris flow and mudslides that resulted from an intense storm in 1982. Finally, the Web site contains suggested readings for the general public and also readings specific to the counties that make up the Greater San Francisco Bay Region.

213

Effect of iron oxide loading on magnetoferritin structure in solution as revealed by SAXS and SANS.  

Science.gov (United States)

Synthetic biological macromolecule of magnetoferritin containing an iron oxide core inside a protein shell (apoferritin) is prepared with different content of iron. Its structure in aqueous solution is analysed by small-angle synchrotron X-ray (SAXS) and neutron (SANS) scattering. The loading factor (LF) defined as the average number of iron atoms per protein is varied up to LF=800. With an increase of the LF, the scattering curves exhibit a relative increase in the total scattered intensity, a partial smearing and a shift of the match point in the SANS contrast variation data. The analysis shows an increase in the polydispersity of the proteins and a corresponding effective increase in the relative content of magnetic material against the protein moiety of the shell with the LF growth. At LFs above ?150, the apoferritin shell undergoes structural changes, which is strongly indicative of the fact that the shell stability is affected by iron oxide presence. PMID:25249246

Melníková, L; Petrenko, V I; Avdeev, M V; Garamus, V M; Almásy, L; Ivankov, O I; Bulavin, L A; Mitróová, Z; Kop?anský, P

2014-11-01

214

Characterization of the neutron detector upgrade to the GP-SANS and Bio-SANS instruments at HFIR  

International Nuclear Information System (INIS)

Over the past year, new 1 m×1 m neutron detectors have been installed at both the General Purpose SANS (GP-SANS) and the Bio-SANS instruments at HFIR, each intended as an upgrade to provide improved high rate capability. This paper presents the results of characterization studies performed in the detector test laboratory, including position resolution, linearity and background, as well as a preliminary look at high count rate performance.

215

Characterization of the neutron detector upgrade to the GP-SANS and Bio-SANS instruments at HFIR  

Energy Technology Data Exchange (ETDEWEB)

Over the past year, new 1 m Multiplication-Sign 1 m neutron detectors have been installed at both the General Purpose SANS (GP-SANS) and the Bio-SANS instruments at HFIR, each intended as an upgrade to provide improved high rate capability. This paper presents the results of characterization studies performed in the detector test laboratory, including position resolution, linearity and background, as well as a preliminary look at high count rate performance.

Berry, Kevin D., E-mail: berrykd@ornl.gov [Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States); Bailey, Katherine M.; Beal, Justin; Diawara, Yacouba; Funk, Loren; Steve Hicks, J.; Jones, A.B.; Littrell, Kenneth C.; Pingali, S.V.; Summers, P.R.; Urban, Volker S.; Vandergriff, David H. [Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States); Johnson, Nathan H.; Bradley, Brandon J. [GE Reuter-Stokes, Inc., Twinsburg, OH 44087 (United States)

2012-11-21

216

40 CFR 81.164 - San Diego Intrastate Air Quality Control Region.  

Science.gov (United States)

...San Diego Intrastate Air Quality Control Region. 81.164 Section 81.164 Protection...PURPOSES Designation of Air Quality Control Regions § 81.164 San Diego Intrastate Air Quality Control Region. The San Diego Intrastate Air...

2010-07-01

217

33 CFR 334.1140 - Pacific Ocean at San Miguel Island, Calif.; naval danger zone.  

Science.gov (United States)

...2010-07-01 false Pacific Ocean at San Miguel Island, Calif.; naval danger zone... § 334.1140 Pacific Ocean at San Miguel Island, Calif.; naval danger zone...The area. The waters around San Miguel Island, extending about 3...

2010-07-01

218

77 FR 61632 - Final Environmental Impact Statement for Cattle Point Road Relocation, San Juan Island National...  

Science.gov (United States)

...Final Environmental Impact Statement for Cattle Point Road Relocation, San Juan Island...Final Environmental Impact Statement for Cattle Point Road Relocation, San Juan Island...erosion that threatens a segment of the Cattle Point Road located in San Juan...

2012-10-10

219

40 CFR 81.164 - San Diego Intrastate Air Quality Control Region.  

Science.gov (United States)

...false San Diego Intrastate Air Quality Control Region. 81.164 Section...PURPOSES Designation of Air Quality Control Regions § 81.164 San Diego Intrastate Air Quality Control Region. The San Diego...

2010-07-01

220

76 FR 45212 - Revisions to the California State Implementation Plan, San Joaquin Valley Unified Air Pollution...  

Science.gov (United States)

...Plan, San Joaquin Valley Unified Air Pollution Control District AGENCY: Environmental...approve San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD...San Joaquin Valley Unified Air Pollution Control District...

2011-07-28

221

75 FR 28509 - Revisions to the California State Implementation Plan, San Joaquin Valley Unified Air Pollution...  

Science.gov (United States)

...Plan, San Joaquin Valley Unified Air Pollution Control District AGENCY: Environmental...the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD...v. San Joaquin Valley Unified Air Pollution Control District, No....

2010-05-21

222

77 FR 43350 - Draft Environmental Assessment and Proposed Habitat Conservation Plan for the San Diego Unified...  

Science.gov (United States)

...federally listed animal, the San Diego fairy shrimp (Branchinecta sandiegonensis...covered by the plan, the San Diego fairy shrimp, and the habitat upon which it...federally endangered San Diego fairy shrimp (Branchinecta...

2012-07-24

223

75 FR 57496 - Notice of Public Meeting, Santa Rosa and San Jacinto Mountains National Monument Advisory...  

Science.gov (United States)

...Service Notice of Public Meeting, Santa Rosa and San Jacinto Mountains National Monument...SUMMARY: In accordance with the Santa Rosa and San Jacinto Mountains National Monument...Forest Service (Forest Service) Santa Rosa and San Jacinto Mountains National...

2010-09-21

224

76 FR 53695 - Notice of Public Meeting, Santa Rosa and San Jacinto Mountains National Monument Advisory...  

Science.gov (United States)

...Service Notice of Public Meeting, Santa Rosa and San Jacinto Mountains National Monument...SUMMARY: In accordance with the Santa Rosa and San Jacinto Mountains National Monument...Forest Service (Forest Service) Santa Rosa and San Jacinto Mountains National...

2011-08-29

225

33 CFR 110.220 - Pacific Ocean at San Nicolas Island, Calif.; restricted anchorage areas.  

Science.gov (United States)

...2010-07-01 false Pacific Ocean at San Nicolas Island, Calif.; restricted anchorage...Grounds § 110.220 Pacific Ocean at San Nicolas Island, Calif.; restricted anchorage...50? (the former position of San Nicolas Island East End Light), which...

2010-07-01

226

40 CFR 81.175 - San Isabel Intrastate Air Quality Control Region.  

Science.gov (United States)

...2010-07-01 2010-07-01 false San Isabel Intrastate Air Quality Control Region...Quality Control Regions § 81.175 San Isabel Intrastate Air Quality Control Region. The San Isabel Intrastate Air Quality Control...

2010-07-01

227

77 FR 4501 - Special Local Regulation and Safety Zone; America's Cup Sailing Events, San Francisco, CA  

Science.gov (United States)

...1299 Storey Ave., San Francisco, CA 94129; March 7, 2012: Inn Marin, 250 Entrada Dr., Novato, CA 94949...of the Port (COTP) San Francisco the responsibility of issuing...races on the waters of San Francisco Bay in California....

2012-01-30

228

33 CFR 165.1154 - Security Zones; Cruise Ships, San Pedro Bay, California.  

Science.gov (United States)

...false Security Zones; Cruise Ships, San Pedro Bay, California. 165.1154 Section...1154 Security Zones; Cruise Ships, San Pedro Bay, California. (a) Definition...inside the Federal breakwaters bounding San Pedro Bay or outside at designated...

2010-07-01

229

33 CFR 165.1151 - Security Zones; liquefied hazardous gas tank vessels, San Pedro Bay, California.  

Science.gov (United States)

...liquefied hazardous gas tank vessels, San Pedro Bay, California. 165.1151 Section...liquefied hazardous gas tank vessels, San Pedro Bay, California. (a) Definition...inside the Federal breakwaters bounding San Pedro Bay or outside at designated...

2010-07-01

230

33 CFR 334.938 - Federal Correctional Institution, Terminal Island, San Pedro Bay, California; restricted area.  

Science.gov (United States)

...Correctional Institution, Terminal Island, San Pedro Bay, California; restricted area...Correctional Institution, Terminal Island, San Pedro Bay, California; restricted area. (a) The area. The waters of San Pedro Bay on the east side of...

2010-07-01

231

Stream Profiles as a Proxy for Uplift in the San Bernardino Mountains  

Science.gov (United States)

Stream profile analysis provides new insight into the tectonic history of the San Bernardino Mountains of southern California. The San Bernardino Mountains, along with the nearby San Gabriel Mountains, have been tectonically uplifted since the late Miocene due to transpression-related thrust faulting. Although regional uplift patterns are not as clear from this data as those of a stream profile analysis in the San Gabriel Mountains, the results observed indicate that this technique can extract useful tectonic data and provide a fast, inexpensive, and easy way to focus fieldwork in a region. For example, in the San Bernardino Mountains, stream profile interpretation from digital elevation models (DEMs) indicates the current/most recent uplift rates on the Yucaipa Ridge at the southern range front are only ~0.5-0.6 mm/yr, much lower than indicated by a published (U-Th)/He age-elevation transect. Also a change in steepness index (ksn) north and south of the Santa Ana Thrust Fault suggests differential uplift across it as recently as the mid to late Quaternary. However, there are important limitations to the method that render interpretations non-unique. For example, the channel downstream of the dam at Big Bear Lake is much steeper than adjacent streams; a tectonic explanation is unlikely. One possibility is that large landslide- and debris-flow-derived boulders have armored the channel and caused the river to oversteepen. Analysis is preliminary but results are encouraging despite complications. In the future we hope to compare channel steepness index values to detrital cosmogenic radionuclide (CRN) erosion rates.

Cornell, K. M.; Whipple, K. X.

2006-12-01

232

78 FR 1760 - Determination of Attainment for the San Francisco Bay Area Nonattainment Area for the 2006 Fine...  

Science.gov (United States)

...proposed to determine that the San Francisco Bay Area nonattainment area...1\\ The San Francisco Bay Area PM 2.5 nonattainment...includes southern Sonoma, Napa, Marin, Contra Costa, San Francisco, Alameda, San Mateo,...

2013-01-09

233

ENVIRONMENTAL CHARACTERISTICS OF SAN MATÍAS GULF OBTAINED FROM LANDSAT-TM AND ETM+ DATA  

OpenAIRE

The San Matías Gulf, located between 40 47' S and 42 13' S on the Atlantic coast of South America, with an area of approximately 18 000 km², is the second largest in Argentina. This gulf has been studied by means of historical data obtained in oceanographic campaigns carried out before 1990 and with satellite images of low-resolution (1000 m) NOAA-AVHRR obtained from 1985. The analysis of this information permitted to infer some environmental characteristics related to temperature, salinity...

Gagliardini, Domingo A.; Rivas, Andre?s L.

2004-01-01

234

Estimating the Impact of Smoking Cessation During Pregnancy: The San Bernardino County Experience  

OpenAIRE

We examined the relation between maternal smoking and adverse infant outcomes [low birth weight (LBW), and preterm birth (PTB)] during 2007–2008 in San Bernardino County, California—the largest county in the contiguous United States which has one of the highest rates of infant mortality in California. Using birth certificate data, we identified 1,430 mothers in 2007 and 1,355 in 2008 who smoked during pregnancy. We assessed the effect of never smoking and smoking cessation during pregnanc...

Batech, Michael; Tonstad, Serena; Job, Jayakaran S.; Chinnock, Richard; Oshiro, Bryan; Merritt, T. Allen; Page, Gretchen; Singh, Pramil N.

2013-01-01

235

Review and analysis of mammographies of Servicio de Radiologia Hospital San Juan de Dios  

International Nuclear Information System (INIS)

The concept of mammography is defined. The mammography has been estimated as the best tool currently available for the detection of breast cancer in its early stages, in addition, have been detected clinically occult lesions. Mammographies of the Servicio de Radiologia Hospital San Juan de Dios were analyzed for a total of 1250. The findings were related as static between BIRADS categorization and inherited-family factors, geographical and personal pathological of patients treated in the period September 2012 to January 2013

236

Geochemical fine-sediment tracers in San Francisco Bay and its outer coast: the role of local watersheds  

Science.gov (United States)

Sediment enters San Francisco Bay (SFB) through the Sacramento-San Joaquin River Delta, the Golden Gate, and local watersheds. Inputs from local watersheds have become increasingly important since the 1940s when large-scale impoundments began upstream of the Delta. The goals of this study are to determine whether fine sediment from local watersheds have distinct geochemical signatures, and if these can be used to determine whether locally-derived sediment accumulates in SFB. Retention of fine sediment is essential if accretion of shallow and intertidal habitats is to keep pace with sea level rise. Total contents of chromium (Cr), lanthanum (La), thorium (Th), zirconium (Zr), rare earth elements (REE), and twenty five other elements were determined by ICP-MS in the fine or "mud" fraction (marine sedimentary rocks. Fine sediment from the Sacramento River was enriched in heavy REE (HREENASC) and Cr, while that from the San Joaquin River was enriched in light REE (LREENASC) and Th. Petaluma River and Sonoma Creek fine sediments were distinguished by middle REE (MREENASC) enrichments and low Cr contents consistent with felsic volcanic rocks. In contrast, fine sediments in Napa River and Wildcat Creek had relatively flat REENASC patterns and intermediate to high Cr contents that suggest a Franciscan influence. The same was true for fine sediment in Marin creeks (Arroyo del Presidio and Corte Madera) and two South Bay tributaries (Guadelupe River and San Francisquito Creek). San Francisquito Creek fine sediment was uniquely enriched in both light and heavy REENASC. Fine sediment in Alameda Creek was very similar to average sedimentary rock (shale) and therefore had no distinctive characteristics. Because the underlying geology is quite diverse, the fine-sediment compositions of the Sacramento and San Joaquin Rivers and local tributaries are in many cases geochemically distinct. Geochemical tracers suggest that fine sediment similar in composition to that in Petaluma/Sonoma tributaries was transported up-estuary into Suisun Bay during flood tide where it was deposited on mudflats. Fine sediment characteristic of the Sacramento River was found throughout SFB, including lower South Bay and the outer coast, while that of the San Joaquin River was not observed downstream of Carquinez Strait. In contrast, Napa River, Coyote Creek, and San Francisquito Creek appeared to contribute little to the sediment budget of SFB. Fine sediment on the outer coast was enriched in elements associated with heavy minerals, likely derived locally from granitic outcrops at Point Reyes and Montara Mountain. The relative uniformity of fine-sediment compositions in San Pablo and South Bays suggests a high degree of mud resuspension and redistribution. Any sediment management decisions should take into account the dynamic nature of the seabed in these subembayments.

Takesue, R. K.; Barnard, P. L.

2012-12-01

237

College Success and the Black Male. San Jose City College, San Jose, California. Research Report #128.  

Science.gov (United States)

In 1992, a study was conducted at San Jose City College (SJCC) and Evergreen Valley College (EVC), California, to examine the fourth semester persistence rates of black male students and to investigate the effect of SJCC athletic and athlete academic support programs on persistence. Study findings included the following: (1) new full-time (NFT)…

Carr, Percy; And Others

238

Immunomodulatory effects of lingzhi and san-miao-san supplementation on patients with rheumatoid arthritis.  

Science.gov (United States)

Rheumatoid arthritis (RA) is an autoimmune joint disease. We evaluated a standard preparation of Lingzhi (Ganoderma lucidum) and San-Miao-San (Rhizoma atractylodis, Cortex phellodendri, Radix achyranthes bidentatae) capsules (TCM group) for its supplementary treatment efficacy for RA. There was no significant difference in the absolute count, percentage, and ratios of CD4(+)/CD8(+)/natural killer/B lymphocytes between the TCM and placebo groups after taking the capsules (all p > 0.05). There was no significant change in concentrations of plasma cytokines of interferon-gamma-induced protein-10 (IP-10), monocyte chemoattractant protein-1, monokine induced by IFN-gamma, regulated upon activation normal T-cell expressed and secreted, interleukin (IL)-8, and IL-18 after taking the capsules for 8 and 24 weeks (all p > 0.05). The percentage change in ex vivo-induced level of inflammatory cytokine IL-18 was significantly lower in the TCM group than in the placebo group after taking the capsules for 24 weeks (p Lingzhi and San-Miao-San capsules might exert a beneficial immunomodulatory effect in patients with rheumatoid arthritis. PMID:16873089

Xi Bao, Yi; Kwok Wong, Chun; Kwok Ming Li, Edmund; Shan Tam, Lai; Chung Leung, Ping; Bing Yin, Yi; Wai Kei Lam, Christopher

2006-01-01

239

Fantastic Elements in Djebar's La Femme sans sépulture  

Directory of Open Access Journals (Sweden)

Full Text Available Fantastic Elements in Djebar’s La Femme sans sépulture Todorov famously defined the fantastic genre as comprising texts set in a recognisably ‘real’ world that involve the possibility, but only the possibility, of a supernatural explanation underlying the events of the story related. Where the supernatural and the natural co-exist as hypotheses within the text, the reader enters a state of hesitation concerning the status of the story-events set before her (Todorov, 1975. If this hesitation is sustained to the end, according to Todorov the text can usefully be classified as belonging to the (pure fantastic genre. Is La Femme sans sépulture an example of the fantastic genre? Certainly the author plays with the conventions of that genre, skilfully juxtaposing two types of explanation for the events recounted and fostering a hesitation on the part of the reader. But this is not an end in itself for Djebar. Rather, the possibility of the supernatural seems to function as a metaphor; if the ghost of Zoulikha ‘haunts’ those who live on after her disappearance (her daughters and former comrades, the narrator herself, and all those for whose freedom she fought, this means that we all owe a duty to the past. Only once she has done her duty to Zoulikha in this way can the author-narrator feel that she has truly returned home. And it is entirely appropriate to represent this relationship to the past as a kind of haunting. This is the use to which Djebar puts the idea of the supernatural; whilst celebrating and continuing Zoulikha’s struggle for the liberation of Algeria and its women, she uses the possibility of the fantastic to convey the uncanny experience of a constant return to her own (cultural self.

Ana M Medeiros

2007-10-01

240

Variation of the Beach Profile, Ocean Beach, San Francisco, California  

Science.gov (United States)

Ocean Beach is a 7-km-long stretch of beach that is the western boundary of the city of San Francisco with the Pacific Ocean. This beach is exposed to large winter waves produced in the North Pacific and smaller summer waves from both the North and South Pacific. Recent decades have seen an increased rate of erosion at the south end of the beach that has led to the partial collapse of a parking lot, and continued erosion threatens both public and private infrastructure. To gain an understanding of the variation in beach profiles we established six cross-shore profiles approximately 1 km apart. Each profile represents a part of the beach that experiences different wave conditions, caused by refraction across the San Francisco Bar, and thus has a different morphologic response to offshore sea conditions. The six sub-aerial profiles were measured using a total station one week apart in August 2006. All profiles increased in elevation and five of the six profiles showed the early formation or continued growth of berms. The same profiles will be re-analyzed in the autumn to determine further change, and compared to data collected by a 2004 SF-ROCKS group that also studied Ocean Beach. We will relate beach profile change to wave conditions measured at an offshore buoy to determine what wave conditions cause profile accretion or erosion. The results of this study will shed light on the processes occurring at Ocean Beach and will help us to understand why the south end of the beach is eroding.

Hansen, J. E.; Ho, T.; Li, A.; Perez, A.; Wong, Y.; Bissell, M.

2006-12-01

241

Depósitos epitermales de baja sulfuración ricos en sulfuros de metales base, distrito aurífero La Carolina, San Luis, Argentina  

OpenAIRE

Low-sulfidation epithermal base-metal sulfide-rich deposits, La Carolina gold-bearing district,San Luis, Argentina. La Carolina gold-bearing district is located at the western end of the Metallogenetic Belt of San Luis, which is spatially and genetically related to the mesosilicic volcanism of mio-pliocene age. The volcanic arc experienced an eastward migration, due to the flattening of the Nazca plate in the segment 27°-33°S, known as the Pampean flat-slab. At La Carolina, the volcanic act...

Gallard-Esquivel María Cecilia; Urbina, Nilda Esther; Sruoga, Patricia; Japas, Mari?a Silvia

2011-01-01

242

San Andreas Fault Observatory at Depth  

Science.gov (United States)

This website provides an overview of the San Andreas Fault Observatory at Depth (SAFOD) project, an initiative to drill into the fault in one of its most predictively active segments near Parkfield, California. Information accessible at the site includes a discussion of drilling methods, an introduction to the structure of the fault zone as it appears at Parkfield, and a discussion of earthquake prediction. Users may also view or download data from the instrument packages in the borehole, including tensor strain, dilational strain, creepmeter data, GPS data, and others. There are also links to additional references and to a glossary.

243

Study of silica sorbents by SANS  

International Nuclear Information System (INIS)

Silica gels under study are materials intended for use as the packing sorbents in liquid chromatography (LC), namely in gel permeation chromatography (GPC). The quality of silica for LC should meet strict physical and chemical parameters. Especially in GPC is very important to know pore size and pore shape because they control the whole process of chromatographic separation. Pore size and thickness of pore wall can be measured by various methods. SANS technique is a nondestructive method providing an average information about a large number of scattering object in our case about objects (pore or wall) in silica and their shape. (author)

244

Protocoles coopératifs pour réseaux sans fil  

OpenAIRE

La technique MIMO (Multiple-Input Multiple-Output) est l’une des techniques de base qui offre une diversité spatiale. Elle associe plusieurs antennes à l’émission et à la réception. En plus de la diversité spatiale, le système MIMO permet d’augmenter le gain de multiplexage sans avoir besoin de plus de bande passante ou de puissance d’émission. Cependant, la technique MIMO a des limites liées au coût d’installation de plusieurs antennes sur un terminal, et a l’écart min...

Slimani, Hicham

2013-01-01

245

SANS investigation on pore morphology in ceria  

International Nuclear Information System (INIS)

We have synthesized ceria (CeO2) powder by homogeneous precipitation method using CeNO3 and hexamethylene tetramine at 80 deg C. The precipitate is calcined and further powdered to an average size of 0. 7 ?m. Afterwards, pellets of 2 to 3 mm thickness are prepared by sintering the powder compacts at 1300 deg C temperature for three sintering time. We carry out small angle neutron scattering (SANS) experiments to investigate the pore structure in these pellets. The results show that with increase in sintering time the peak of the size distribution profile shifts towards the larger size (author)

246

Amplification sans bruit d'images optiques  

Science.gov (United States)

Nous utilisons un Oscillateur Paramétrique Optique (OPO) pompé sous le seuil dans le but d'amplifier une image multimode transverse sans dégradation du rapport signal à bruit. Le dispositif expérimental met en œuvre un OPO de type II triplement résonant et semi-confocal pour le faisceau amplifié. L'existence d'effets quantiques lors de l'amplification multimode dans un tel dispositif a été montrée expérimentalement. Plus généralement, ceci nous a amené à étudier les propriétés quantiques transverses des faisceaux lumineux amplifiés. Une telle étude peut trouver des applications non seulement en imagerie, mais également dans le traitement quantique de l'information.

Gigan, S.; Delaubert, V.; Lopez, L.; Treps, N.; Maitre, A.; Fabre, C.

2004-11-01

247

San Carlos, Island of Chiloé  

OpenAIRE

Drawing [vertical orientation]; similar to watercolour engraved by Bull S as `San Carlos de Chiloé reproduced facing Narrative 1: 275. The street curves slightly from the right of the foreground to the left centre of the background, with a possible drainage channel edging the pavement area on the left-hand side. It slopes down to a moored boat, behind which lies a second (possibly fishing) boat with an indication of two human figures aboard, and a mast, partly obscured by a building on the...

2007-01-01

248

Neutrinos from San Marco and Below  

CERN Document Server

Order of magnitude estimates of radiogenic heat and antineutrino production are given, using the San Marco cathedral as an example. Prospects of determining the radiogenic contribution to terrestrial heat by detection of antineutrinos from natural radioactivity (geoneutrinos) are discussed. A three kton scintillator detector in three years can clearly discriminate among different models of terrestrial heat production. In addition, the study of geoneutrinos offers a possibility of improving the determination of neutrino mass and mixing, by exploiting the knowledge of Th/U abundance in the Earth.

Fiorentini, G; Mantovani, F; Ricci, B

2003-01-01

249

Risk behaviors of Filipino methamphetamine users in San Francisco: implications for prevention and treatment of drug use and HIV.  

OpenAIRE

OBJECTIVE: This study describes the demographics, HIV risk and drug use behaviors, and psychosocial status of Filipino American methamphetamine users in the San Francisco Bay area. METHODS: Individual interviews were conducted with 83 Filipino American methamphetamine users, recruited through snowball sampling methods. A structured survey questionnaire included measures of drug use behaviors, HIV-related sexual behaviors, psychosocial factors, and demographics. RESULTS: Filipino methamphetami...

Nemoto, Tooru; Operario, Don; Soma, Toho

2002-01-01

250

HOWARD FORK ACID ROCK DRAINAGE SOURCE INTERCEPTION STUDY; HOWARD FORK OF THE SAN MIGUEL RIVER NEAR OPHIR, COLORADO  

Science.gov (United States)

This project proposes to analyze regional hydrogeology as it relates to mine workings which discharge significant heavy metals into the Howard Fork of the San Miguel River and recommend strategies to intercept and divert water away from mineralized zones. The study also includes...

251

Sequence Stratigraphy of the Dakota Sandstone, Eastern San Juan Basin, New Mexico, and its Relationship to Reservoir Compartmentalization  

Energy Technology Data Exchange (ETDEWEB)

This research established the Dakota-outcrop sequence stratigraphy in part of the eastern San Juan Basin, New Mexico, and relates reservoir quality lithologies in depositional sequences to structure and reservoir compartmentalization in the South Lindrith Field area. The result was a predictive tool that will help guide further exploration and development.

Varney, Peter J.

2002-04-23

252

SANS and dynamic light scattering to investigate the viscosity of toluene under high pressure up to 1800 bar  

International Nuclear Information System (INIS)

We present a joint experimental study of small angle neutron scattering (SANS) and dynamic light scattering (DLS) under high pressures up to 1800 bar on a colloidal suspension, which consists of a core–shell system made of sterically stabilized silica particles grafted with octadecyl chains in toluene. From the analysis of SANS contrast variation under pressure, we could estimate the amount of compression in both core and shell under the action of pressure. The DLS measurements under pressure yield a diffusion coefficient which enabled us together with the SANS result to evaluate the pressure-dependent viscosity of the dilute suspension which is to a good approximation the solvent viscosity on the basis of the Stokes–Einstein relation. The excellent comparison of the so-calculated pressure-dependent viscosities of toluene with literature values demonstrates the value of our method to measure viscosities under pressure

253

La Formación histórica de la comunidad de San Andrés  

OpenAIRE

Se aborda lo antitético de los inicios fundacionales del territorio holguinero y la formación de los hatos con énfasis en el de San Andrés. Se realiza una valoración sobre el desarrollo del poblamiento de la comunidad de San Andrés, que contempla las etnias a las que pertenecían los emigrantes con datos estadísticos.

Ednez, Carlos C. U. F. Rdova Mart U.; Edguez Cruz, Juan Carlos Rodr U.; Edguez Cruz, Juan Miguel Rodr U.

2006-01-01

254

Pathways to ICT Education and Careers in San Francisco  

Science.gov (United States)

This report documents research on organizations, programs and efforts relevant to ICT Pathways in San Francisco. The ICT Pathways Project aims to "gather strategic stakeholders in San Francisco to improve pathways to ICT education and careers, grow our own ICT workforce, meet employer ICT workforce demand, and improve our economy in the process." This 194 page document is available as a PDF for download.

2012-10-15

255

COSMOS (County of San Mateo Online System). A Searcher's Manual.  

Science.gov (United States)

Operating procedures are explained for COSMOS (County of San Mateo Online System), a computerized information retrieval system designed for the San Mateo Educational Resources Center (SMERC), which provides interactive access to both ERIC and a local file of fugitive documents. COSMOS hardware and modem compatibility requirements are reviewed,…

San Mateo County Superintendent of Schools, Redwood City, CA. Educational Resources Center.

256

33 CFR 117.984 - San Bernard River.  

Science.gov (United States)

...Waters 1 2010-07-01 2010-07-01 false San Bernard River. 117.984 Section 117.984 Navigation and Navigable...REGULATIONS Specific Requirements Texas § 117.984 San Bernard River. The draw of the Union Pacific railroad...

2010-07-01

257

33 CFR 167.404 - Off San Francisco: Western approach.  

Science.gov (United States)

...2010-07-01 2010-07-01 false Off San Francisco: Western approach. 167.404 Section 167.404 Navigation and Navigable...Pacific West Coast § 167.404 Off San Francisco: Western approach. (a) A separation zone is bounded by a line...

2010-07-01

258

33 CFR 167.402 - Off San Francisco: Northern approach.  

Science.gov (United States)

...2010-07-01 2010-07-01 false Off San Francisco: Northern approach. 167.402 Section 167.402 Navigation and Navigable...Pacific West Coast § 167.402 Off San Francisco: Northern approach. (a) A separation zone is bounded by a line...

2010-07-01

259

33 CFR 167.403 - Off San Francisco: Southern approach.  

Science.gov (United States)

...2010-07-01 2010-07-01 false Off San Francisco: Southern approach. 167.403 Section 167.403 Navigation and Navigable...Pacific West Coast § 167.403 Off San Francisco: Southern approach. (a) A separation zone is bounded by a line...

2010-07-01

260

33 CFR 110.126a - San Francisco Bay, Calif.  

Science.gov (United States)

...2010-07-01 2010-07-01 false San Francisco Bay, Calif. 110.126a Section...Anchorage Areas § 110.126a San Francisco Bay, Calif. Richardson Bay Anchorage...Bay Regional Agency and the County of Marin. These ordinances establish...

2010-07-01

261

Photograph of San Francisco in ruins from Lawrence Captive Airship  

Science.gov (United States)

George R. Lawrence's famous image of post-earthquake San Francisco from 2000 feet above the bay. Captured using an ingenious system of kites, this fish-eye photograph captures the entire city San Francisco after the quake. The photo is available in several sizes and formats ranging from small JPEG files to a 157 MB TIFF version of the iconic image.

George R. Lawrence

262

Investigation of the San Gabriel Fault in the Vicinity of Pyramid and Castaic Dams, Los Angeles County, California: Geologic and Seismologic Constraints from Existing  

Science.gov (United States)

Pyramid and Castaic Dams are in an active transpressional deformation zone between the San Gabriel and San Andreas faults. The San Gabriel fault is ~3 km west of both dams, and is an ~80-km long structure. The fault plane geometry exerts a strong control on the calculated ground motion at the dam sites. Geologic studies have characterized the fault activity, geometry, and sense of displacement along the southern San Gabriel fault sections, (i.e., Honor Rancho, Newhall sections), whereas there is more uncertainty along the northern San Gabriel fault section (i.e., Palomas section). In particular, the dip direction and angle of the Palomas section at seismogenic depths are poorly constrained. Existing parameterizations of the Palomas section of the San Gabriel fault geometry range from near vertical orientation with strike-slip displacement to about 60 degree northeast dip with reverse displacement. To better assess the geometry of the San Gabriel fault at seismogenic depths (>5 km), we analyzed existing published oil well logs, available seismicity data, geologic maps, and current fault mapping. Spatial analysis of the seismicity data showed diffuse hypocentral trends that defied discrete fault plane identification. Analyses of focal mechanism solutions indicate fault strike directions in the west-northwest directions, discordant with the strike of the San Gabriel fault near Pyramid Dam. The focal mechanisms better indicate slip transfer to splay structures such as the Holser, Del Valle, and Santa Susana faults that sole into the active San Cayetano fault system to the west. Existing data do not provide sufficient information to refute an easterly dipping San Gabriel fault plane, nor do the data preclude a vertical to near-vertical orientation of the fault near Pyramid Dam. Based on apparent non-deformation of the Pliocene Hungry Valley Formation, the Palomas section of the fault has been proposed as inactive. This study identifies apparent undeformed Quaternary pediment surfaces overlying the mapped San Gabriel fault trace in the vicinity of Pyramid Lake, and an absence of fault-related geomorphic features along strike, consistent with inactivity. Alternatively, the slip rates along this part of the fault simply may be very low (e.g., 0.1mm/yr). Further assessment of the San Gabriel fault in the vicinity of Pyramid Lake will provide significant improvements to the understanding of the seismic hazard in this area.

Pearce, J. T.; Turner, J. P.; O'Connell, D. R.; Hoirup, D. F.; Barry, G.; Glick, F.

2012-12-01

263

The radiological accident in San Salvador  

International Nuclear Information System (INIS)

On 5 February 1989, a radiological accident occurred at an industrial irradiation facility near San Salvador, the capital of the Republic of El Salvador. Prepackaged medical products are sterilized at the facility by irradiation by means of an intensely radioactive cobalt-60 source in a movable source rack. The accident happened when this source rack became stuck in the irradiation position. The operator bypassed the irradiator's already degraded safety systems and entered the radiation room with two other workers to free the source rack manually. The three workers were exposed to high radiation doses and developed the acute radiation syndrome. Their initial hospital treatment in San Salvador and subsequent more specialized treatment in Mexico City were effective in countering the acute effects. However, the legs and feet of two of the three men were so seriously injured that amputation was required. The worker who had been most exposed died six and a half months after the accident, his death being attributed to residual lung damage due to irradiation, exacerbated by injury sustained during treatment. The report details the events leading up to the accident, the circumstances of the accident itself and the response to it. From the facts established, lessons are derived for operators and suppliers of irradiators, national authorities, medical staff and international organizations. Detailed information on dosimetric and medical aspects of the accident for the specialistaspects of the accident for the specialist reader is presented in the appendices and annexes. 20 figs, 9 tabs, 24 photographs

264

Wind resource assessment: San Nicolas Island, California  

Energy Technology Data Exchange (ETDEWEB)

San Nicolas Island (SNI) is the site of the Navy Range Instrumentation Test Site which relies on an isolated diesel-powered grid for its energy needs. The island is located in the Pacific Ocean 85 miles southwest of Los Angeles, California and 65 miles south of the Naval Air Weapons Station (NAWS), Point Mugu, California. SNI is situated on the continental shelf at latitude N33{degree}14` and longitude W119{degree}27`. It is approximately 9 miles long and 3.6 miles wide and encompasses an area of 13,370 acres of land owned by the Navy in fee title. Winds on San Nicolas are prevailingly northwest and are strong most of the year. The average wind speed is 7.2 m/s (14 knots) and seasonal variation is small. The windiest months, March through July, have wind speeds averaging 8.2 m/s (16 knots). The least windy months, August through February, have wind speeds averaging 6.2 m/s (12 knots).

McKenna, E. [National Renewable Energy Lab., Golden, CO (United States); Olsen, T.L. [Timothy L. Olsen Consulting, (United States)

1996-01-01

265

Solar sanitary system (SOL-SAN)  

Energy Technology Data Exchange (ETDEWEB)

Ordinary composting toilets, because of cooling by evaporation, do not heat the product (humus) hot enough to kill all pathogenic viruses, bacteria, or parasite eggs and cysts. The SOL-SAN system uses direct radiation to pasteurize incoming river water for drinking and also, separately, to pasteurize and dry the humus, and to pasteurize the effluent gray/brown water. Work is in progress on simple fool-proof methods of insuring that the water will not flow out unless it has been pasteurized. Heat exchangers recapture the heat from these very hot pasteurized liquids, thereby warming more in-coming water for washing, which is important for preventing transmission of pathogenic microbes. When pasteurized, the humus and gray/brown water can safely be recycled to fertilize and water the family vegetable garden. Thus no sewer would be needed, and the vegetables or fish would grow well. Widespread use of the SOL-SAN system would save water and nutrients, reduce the prevalence of infectious diseases, improve the nutrition and vitality of the population, and save the large fraction of human food now consumed by parasites.

Cobb, J.C.

1996-11-01

266

76 FR 70480 - Otay River Estuary Restoration Project, South San Diego Bay Unit of the San Diego Bay National...  

Science.gov (United States)

...Poseidon Resources Carlsbad Desalination Project, in order to implement...mitigation requirement for the desalination project. On November 15...E-06-013) for the Poseidon desalination facility in Carlsbad, San...and the San Diego Regional Water Quality Control Board...

2011-11-14

267

[Pteridophytes that indicate environmental alteration in the temperate forest of San Jerónimo Amanalco, Texcoco, Mexico].  

Science.gov (United States)

Pteridophytes that indicate environmental alteration in the San Jer6nimo Amanalco temperate forest, Texcoco, Mexico. The patterns of distribution of 26 pteridophyte species were studied as possible indicators of environmental alteration in the temperate forest of San Jer6nimo Amanalco, Texcoco, State of Mexico. The presence and abundance of the pteridoflora was studied in relation to edaphic, topographic and vegetation variables in 100 sampling locations within an area of 494 hectares. The relationship between these variables was studied using Canonical Correspondence Analysis. Five landscapes were recognized in the study zone according to the degree of deterioration: severe erosion, erosion, mountain with moderate reversible deterioration, mountain with no evident deterioration, and canyon with no evident deterioration. Cheilanthes bonariensis and Pellaea ternifolia are indicators of environmental degradation. The taxa that only grow in landscapes without apparent alteration are Adiantum andicola, Adiantum poiretii, Argyrochosma incana, Asplenium blepharophorum, Dryopteris pseudo filix-mas, Equisetum hyemale and Pteris cretica. PMID:19256434

Lucía Rodríguez, Romero; Pacheco, Leticia; Zavala Hurtado, José Alejandro

2008-06-01

268

Understanding sociocultural and psychological factors affecting transgender people of color in San Francisco.  

Science.gov (United States)

This ethnographic qualitative study explored the needs of transgender people of color, including biological transitioning issues, gender and group membership identity formation, HIV, and other health issues. The sample consisted of transgender youth and adults of color in San Francisco (N = 43). Data were collected from in-depth interviews with 20 youth and adults and focus groups with 23 individuals. The study focused on perspectives of racial and ethnic minorities from Asian/Pacific Islander, African American, and Latino backgrounds. The medical decision-making perspective was used to gain a deeper understanding of sociocultural and psychological factors affecting transgender individuals of color in San Francisco. The major themes that emerged were gender identity, group membership, transitioning and related issues, sex work, alcohol and drug use, mental health and health care, sense of community, HIV, resources, and other support. Key clinical considerations that health providers can use to improve care of transgender individuals of color are included. PMID:20416495

Bith-Melander, Pollie; Sheoran, Bhupendra; Sheth, Lina; Bermudez, Carlos; Drone, Jennifer; Wood, Woo; Schroeder, Kurt

2010-01-01

269

A correlation for miscible flood displacement efficiency in the San Andres with NMR relaxation  

International Nuclear Information System (INIS)

This paper reports that a set of San Andres crystalline dolomite cores was examined for the relationship between pore attributes discernible from NMR relaxation and miscible flooding displacement efficiency. A strong correlation was observed between the inferred abundance of long relaxation time components and laboratory measured residual oil to a multicontact miscible displacement process. NMR relaxation time distribution proved to be a simple, noninvasive, nondestructive indicator of flow performance in the 12 San Andres dolomite samples examined. Spin-lattice relaxation measurements were conducted on clean, brine saturated core end pieces from plugs taken adjacent to those used for flow displacement studies. Sample data were deconvoluted into a distribution of relaxation times, which is ultimately related to surface-to-volume ratio distribution. The median relaxation time was determined to be the most sensitive statistics to convey flow performance. Residual oil saturation was adequately represented by a power law function of the median relaxation time

270

ASPECTOS PETROGRAFICOS Y GEOQUIMICOS DE LAS ROCAS METAMORFICAS DEL SECTOR BARRANCO DE LOBA (SERRANIA DE SAN LUCAS) / PETROGRAPHIC AND GEOCHEMISTRY ASPECTS OF METAMORPHIC ROCKS IN BARRANCO DE LOBA AREA (SERRANIA DE SAN LUCAS)  

Scientific Electronic Library Online (English)

Full Text Available SciELO Colombia | Language: Spanish Abstract in spanish Las rocas metamórficas aflorantes en la Plancha 64 (estribación NE de la Serranía de San Lucas, Cordillera Central), están agrupadas en dos unidades estratigráficas: una denominada formación Neis de San Lucas y otra unidad de carácter informal, denominada Unidad Metamórfica de Pinillos. Esta ultima, [...] compuesta por los Esquistos de Armenia y las Filitas de Tapoa. El Neis de San Lucas, consiste en neises cuarzo-feldespáticos (neises cuarzo-feldespáticos con biotita, neises cuarzo-feldespáticos con hornblenda) y rocas metamáficas (neis hornblendico, granulitas, metagabros). Los Esquistos de Armenia, se componen de esquistos pelíticos, tales como esquistos micáceos y esquistos micáceos con andalusita, y esquistos calco-silicatados, los cuales son cuarzosos con cantidades variables de minerales del grupo de la epidota, hornblenda y actinolita. Las Filitas de Tapoa son rocas compuestas de cuarzo y sericita con minerales opacos alterados. El metamorfismo del Neis de San Lucas es regional, alcanzando las facies anfibolita alta y granulita piroxénica. Edades U-Pb en circones de esta formación, apunta a un evento tectonotermal del Mesoproterozoico (1124Ma±22 Ma), relacionado con la orogenia Grenviliana, durante la consolidación del supercontinente Rodinia. Las rocas de la Unidad Metamórfica de Pinillos, es considerada por sus relaciones de campo, como de edad Paleozoica Temprano. Abstract in english The metamorphic rocks that outcrop in the San Lucas foothills (in the area covered by the map indentifed as number 64), are grouped in two stratigraphic units: The so-called San Lucas Gneiss Formation and the Pinillos Metamorphic Unit (informal stratigraphic denomination). This latter unit is compos [...] ed by The Armenia Schists and Tapoa Phyllites. The San Lucas Gneiss Formation, comprise quartz-feldspar gneisses (quartz-feldspar gneisses with biotite, quartz-feldspar gneisses with hornblende) and metamafc rocks (hornblende gneiss, granulites and metagabbros). The Armenia Schists is composed by pelite schists; such as micaceous schists; micáceous schists with andalusite; and calco-silicate schists, quartz rich and with variable amounts of minerals from epidote, hornblende and actinolite groups. The Tapoa Phyllite Rocks are composed by quartz and sericite with altered opaque minerals. The San Lucas Gneiss Formation Metamorphism is regional and reaches the high anfbolite and pyroxene granulites facies. The 1.124Ma ± 22 zircon U-Pb age, indicates a Mesoproterozoic tectonothermal event, related to the Grenville Orogeny, that took place during the Rodinia supercontinent consolidation. The Pinillos Metamorphic Rocks Unit, is Early Paleozoic in age, according to the feld relations.

Carlos Alberto, García R.; Correa, Karen; Luis C., Mantilla F.; Luis, Bernal..

2009-06-01

271

Petrología del plutón La Florida, sierra de San Luis / Petrology of the La Florida stock, Sierra de San Luis  

Scientific Electronic Library Online (English)

Full Text Available SciELO Argentina | Language: Spanish Abstract in spanish El plutón La Florida se localiza en la parte central de la Sierra de San Luis y se aloja en metasedimentitas regionales de grado medio pertenecientes al grupo micaesquistos derivadas de subgrauvacas y areniscas. Es de morfología semicircular, ligeramente elongado en dirección oblicua a la foliación [...] regional, la cual acompaña la forma del plutón en el contacto. Su composición es monzogranítica y marcadamente peraluminoso, y está compuesto por cuarzo, microclino, plagioclasa, muscovita, biotita y granate. El estudio detallado ha permitido establecer que el contenido de biotita de los monzogranitos disminuye hacia los bordes del cuerpo en tanto que la muscovita, generalmente porfiroblástica, aumenta, lo cual conduce a variaciones notables del índice de color de las rocas. Además, se registra una abundante pegmatización que forma tanto diques como cuerpos irregulares en el borde del intrusivo y también en las rocas de caja adyacentes al contacto. Esta zonación sería resultado del incremento de fluidos acuosos durante la etapa tardío magmática, que causaron reacciones subsólidas en la mineralogía ortomagmática. El magma está relacionado con el proceso subductivo desarrollado durante la orogenia famatiniana, muestra afinidad con fundidos sin-colisionales y un tren evolutivo compatible con magmas de tipo S. El plutón de La Florida exhibe algunas diferencias geológicas, petrográficas y composionales con otros granitoides sin-cinemáticos de la sierra de San Luis, encontrándose algunas similitudes solamente con rocas del cordón de El Realito. Abstract in english La Florida pluton is located in the central part of the Sierra de San Luis. It is a nearly semicircular-shape intrusion, slightly elongated perpendicularly to the main NNE-SSW country rocks foliation, which deforms at the pluton margins. The body is emplaced in medium-grade metamorphosed subgreywake [...] s and sandstones-derived rocks of the Micaschist Group. Intrusive rocks are mostly greyish medium to coarse-grained peraluminous monzogranites, composed of quartz, microcline, plagioclase, muscovite, biotite and minor garnet. Biotite content decreases from the core to the margin of the pluton while muscovite, usually forming up to 4 cm-long porphyroblasts, and garnet amounts increase in such direction. This leads to a remarkable variation of the colour index across the body, grading from 12 % to 0 % at the contact with the country rocks. Abundants dykes and irregular bodies of pegmatites intrude the outer parts of the pluton as well as the adjacent metasedimentary country rocks. The mineralogical zonation and the increase of pegmatization to the margins is interpreted here as the result of the enrichment in water-rich late-magmatic fluids which caused subsolid reactions with the minerals cristallized during the orthomagmatic stage. The magmatism is related to the Famatinian subduction, showing a syn-collisional affinity and S-type evolutionary trend. However, several differences have been found between La Florida and others syn-kinematic S-type granitoids from the Sierra de San Luis.

E., Carol; P., Parrini; N., Brogioni.

2007-09-01

272

Petrología del plutón La Florida, sierra de San Luis Petrology of the La Florida stock, Sierra de San Luis  

Directory of Open Access Journals (Sweden)

Full Text Available El plutón La Florida se localiza en la parte central de la Sierra de San Luis y se aloja en metasedimentitas regionales de grado medio pertenecientes al grupo micaesquistos derivadas de subgrauvacas y areniscas. Es de morfología semicircular, ligeramente elongado en dirección oblicua a la foliación regional, la cual acompaña la forma del plutón en el contacto. Su composición es monzogranítica y marcadamente peraluminoso, y está compuesto por cuarzo, microclino, plagioclasa, muscovita, biotita y granate. El estudio detallado ha permitido establecer que el contenido de biotita de los monzogranitos disminuye hacia los bordes del cuerpo en tanto que la muscovita, generalmente porfiroblástica, aumenta, lo cual conduce a variaciones notables del índice de color de las rocas. Además, se registra una abundante pegmatización que forma tanto diques como cuerpos irregulares en el borde del intrusivo y también en las rocas de caja adyacentes al contacto. Esta zonación sería resultado del incremento de fluidos acuosos durante la etapa tardío magmática, que causaron reacciones subsólidas en la mineralogía ortomagmática. El magma está relacionado con el proceso subductivo desarrollado durante la orogenia famatiniana, muestra afinidad con fundidos sin-colisionales y un tren evolutivo compatible con magmas de tipo S. El plutón de La Florida exhibe algunas diferencias geológicas, petrográficas y composionales con otros granitoides sin-cinemáticos de la sierra de San Luis, encontrándose algunas similitudes solamente con rocas del cordón de El Realito.La Florida pluton is located in the central part of the Sierra de San Luis. It is a nearly semicircular-shape intrusion, slightly elongated perpendicularly to the main NNE-SSW country rocks foliation, which deforms at the pluton margins. The body is emplaced in medium-grade metamorphosed subgreywakes and sandstones-derived rocks of the Micaschist Group. Intrusive rocks are mostly greyish medium to coarse-grained peraluminous monzogranites, composed of quartz, microcline, plagioclase, muscovite, biotite and minor garnet. Biotite content decreases from the core to the margin of the pluton while muscovite, usually forming up to 4 cm-long porphyroblasts, and garnet amounts increase in such direction. This leads to a remarkable variation of the colour index across the body, grading from 12 % to 0 % at the contact with the country rocks. Abundants dykes and irregular bodies of pegmatites intrude the outer parts of the pluton as well as the adjacent metasedimentary country rocks. The mineralogical zonation and the increase of pegmatization to the margins is interpreted here as the result of the enrichment in water-rich late-magmatic fluids which caused subsolid reactions with the minerals cristallized during the orthomagmatic stage. The magmatism is related to the Famatinian subduction, showing a syn-collisional affinity and S-type evolutionary trend. However, several differences have been found between La Florida and others syn-kinematic S-type granitoids from the Sierra de San Luis.

E. Carol

2007-09-01

273

Estudio petrográfico de las facies piroclásticas de la Formación Cerro Varela en el sur de la Sierra de San Luis / Petrographic study of the pyroclastic facies of the Cerro Varela Formation in the south of the Sierra de San Luis  

Scientific Electronic Library Online (English)

Full Text Available SciELO Argentina | Language: Spanish Abstract in spanish En la provincia de San Luis, existen tres sub-cuencas denominadas Las Salinas, Beazley y Mercedes. Estas cuencas corresponden a depocentros de rift elongados en sentido NO, que alojan rocas ígneas de edad triásica con espesores que llegan hasta los 4.000 metros. Las rocas ígneas de la Formación Cerr [...] o Varela forman parte del cerro homónimo que constituye los últimos asomos australes de la sierra de San Luis. Las riolitas triásicas que afloran en la sierra de Varela se disponen dentro de un esquema estructural extensional asociado a la formación de cuencas de tipo rift. Las unidades analizadas de la Formación Cerro Varela están compuestas por tobas cristalinas tanto de alto grado como de bajo grado de soldadura, de composición riolítica e interpretadas como depósitos originados por flujos piroclásticos. Por su litología, edad y contexto regional, las rocas de la Formación Cerro Varela integran el magmatismo gondwánico del Grupo Choiyoi de edad permotriásica de la Cordillera Frontal de Mendoza y San Juan. Abstract in english In the San Luis province, there are three sub-basins called Las Salinas, Beazley and Mercedes. These basins correspond to elongated rift depocenter with a NO orientation that host Triassic igneous rocks with thicknesses that reach 4,000 meters. The igneous rocks from Cerro Varela Formation, part of [...] the homonym hill, is the last vestige of the southern Sierra San Luis. The Triassic rhyolites that crop up in the sierra de Varela, are placed within a structural pattern associated with the formation of extensional basins. Crystal tuffs of Cerro Varela are corresponds to tuffs with high and low degree of welding, of rhyolitic composition and interpreted as pyroclastic deposits. For its lithology, age and regional context, the rocks of the Cerro Varela Formation integrate the Gondwanic magmatism of Permo-Triassic age, related to the Choiyoi Group of the Cordillera Frontal of Mendoza and San Juan.

Amancay N., Martínez; Daniel, Codega; David, Aguilera.

2010-11-01

274

Estudio petrográfico de las facies piroclásticas de la Formación Cerro Varela en el sur de la Sierra de San Luis Petrographic study of the pyroclastic facies of the Cerro Varela Formation in the south of the Sierra de San Luis  

Directory of Open Access Journals (Sweden)

Full Text Available En la provincia de San Luis, existen tres sub-cuencas denominadas Las Salinas, Beazley y Mercedes. Estas cuencas corresponden a depocentros de rift elongados en sentido NO, que alojan rocas ígneas de edad triásica con espesores que llegan hasta los 4.000 metros. Las rocas ígneas de la Formación Cerro Varela forman parte del cerro homónimo que constituye los últimos asomos australes de la sierra de San Luis. Las riolitas triásicas que afloran en la sierra de Varela se disponen dentro de un esquema estructural extensional asociado a la formación de cuencas de tipo rift. Las unidades analizadas de la Formación Cerro Varela están compuestas por tobas cristalinas tanto de alto grado como de bajo grado de soldadura, de composición riolítica e interpretadas como depósitos originados por flujos piroclásticos. Por su litología, edad y contexto regional, las rocas de la Formación Cerro Varela integran el magmatismo gondwánico del Grupo Choiyoi de edad permotriásica de la Cordillera Frontal de Mendoza y San Juan.In the San Luis province, there are three sub-basins called Las Salinas, Beazley and Mercedes. These basins correspond to elongated rift depocenter with a NO orientation that host Triassic igneous rocks with thicknesses that reach 4,000 meters. The igneous rocks from Cerro Varela Formation, part of the homonym hill, is the last vestige of the southern Sierra San Luis. The Triassic rhyolites that crop up in the sierra de Varela, are placed within a structural pattern associated with the formation of extensional basins. Crystal tuffs of Cerro Varela are corresponds to tuffs with high and low degree of welding, of rhyolitic composition and interpreted as pyroclastic deposits. For its lithology, age and regional context, the rocks of the Cerro Varela Formation integrate the Gondwanic magmatism of Permo-Triassic age, related to the Choiyoi Group of the Cordillera Frontal of Mendoza and San Juan.

Amancay N. Martínez

2010-11-01

275

SAN/CXFS test report to LLNL  

Energy Technology Data Exchange (ETDEWEB)

The primary objectives of this project were to evaluate the performance of the SGI CXFS File System in a Storage Area Network (SAN) and compare/contrast it to the performance of a locally attached XFS file system on the same computer and storage subsystems. The University of Minnesota participants were asked to verify that the performance of the SAN/CXFS configuration did not fall below 85% of the performance of the XFS local configuration. There were two basic hardware test configurations constructed from the following equipment: Two Onyx 2 computer systems each with two Qlogic-based Fibre Channel/XIO Host Bus Adapter (HBA); One 8-Port Brocade Silkworm 2400 Fibre Channel Switch; and Four Ciprico RF7000 RAID Disk Arrays populated Seagate Barracuda 50GB disk drives. The Operating System on each of the ONYX 2 computer systems was IRIX 6.5.6. The first hardware configuration consisted of directly connecting the Ciprico arrays to the Qlogic controllers without the Brocade switch. The purpose for this configuration was to establish baseline performance data on the Qlogic controllers / Ciprico disk raw subsystem. This baseline performance data would then be used to demonstrate any performance differences arising from the addition of the Brocade Fibre Channel Switch. Furthermore, the performance of the Qlogic controllers could be compared to that of the older, Adaptec-based XIO dual-channel Fibre Channel adapters previously used on these systems. It should be noted that only raw device tests were performed on this configuration. No file system testing was performed on this configuration. The second hardware configuration introduced the Brocade Fibre Channel Switch. Two FC ports from each of the ONYX2 computer systems were attached to four ports of the switch and the four Ciprico arrays were attached to the remaining four. Raw disk subsystem tests were performed on the SAN configuration in order to demonstrate the performance differences between the direct-connect and the switched configurations. After this testing was completed, the Ciprico arrays were formatted with an XFS file system and performance numbers were gathered to establish a File System Performance Baseline. Finally, the disks were formatted with CXFS and further tests were run to demonstrate the performance of the CXFS file system. A summary of the results of these tests is given.

Ruwart, T M; Eldel, A

2000-01-01

276

Cianobacterias del embalse San Roque (Córdoba, Argentina Cyanobacteria of the San Roque reservoir (Córdoba, Argentina  

Directory of Open Access Journals (Sweden)

Full Text Available Este trabajo es una contribución al conocimiento de las cianobacterias presentes en el embalse San Roque y forma parte de un estudio integral de la flora algal del mencionado embalse. Se citan 24 taxa correspondientes a los Ordenes Chroococcales (11, Nostocales (8 y Oscillatoriales (5. Synechocystis aquatilis, Gloeocapsa rupestris, Gomphosphaeria aponina, Chamaesiphon incrustans f. incrustans, Scytonema crispum, Tolypothrix distorta, Gloeotrichia pisum, Calothrix fusca, Trichodesmium lacustre, Geitlerinema splendidum, Lyngbya aestuarii y Borzia trilocularis son nuevas citas para la zona de estudio.This work is a contribution to the knowledge of the Cyanobacteria present in the San Roque reservoir and forms a part of an integral study of its algal flora. Twenty-four taxa are described and ilustrated: 11 Chroococcales, 8 Nostocales, and 5 Oscillatoriales. Synechocystis aquatilis, Gloeocapsa rupestris, Gomphosphaeria aponina, Chamaesiphon incrustans f. incrustans, Scytonema crispum, Tolypothrix distorta, Gloeotrichia pisum, Calothrix fusca, Trichodesmium lacustre, Geitlerinema splendidum, Lyngbya aestuarii and Borzia trilocularis.

Inés Claudia Daga

2011-12-01

277

Estudio de prospectiva en el sector comercial de San Victorino San Victorino 2015  

OpenAIRE

Basándonos en un estudio de prospectiva con el método de planeación por escenarios y centrados en un planteamiento estratégico, propuesto por nosotros, crearemos una serie de hipótesis que corroboramos dando así un impacto de la necesidad de crear nuevos procesos basados en métodos para que las empresas de San Victorino puedan sobrellevar las turbulencias y además logren crear una visión sobre lo que les depara en el futuro basados en planteamientos e...

Go?mez Zuluaga, Juan Diego; Valderrama, David Alejandro

2006-01-01

278

Danger on mountain roads, Iglesia Department, San Juan, Argentina  

International Nuclear Information System (INIS)

This paper is related to Mining Projects at Valle del Cura - Iglesia Department-San Juan Province-Argentina Republic. Basis for an Integrated Management of a Sustainable Mining.It aims at locating and analyzing natural dangers which may interfere high mountain paths, such as climatic, anthropic and/or tectonic factors since they may stop a region development. A hillside, a mountainside,a talus or a slope may have, due to their extensive areas, either lithological or structural variations which might determine the presence of un stability phenomena.The cordillera n Iglesia sector major dangers are related to mass displacement movements as a result of the great quantity of unstable detritus situated in valleys slopes.Landsat images, aerial photographs, topographic and geological maps data allowed to detect several sectors that may generate mass displacement movements, Arroyo de Aguas Negras rising sector was selected because it is on the right of National Route No. 150 trace. It is not only a national, but also an international route that connects Argentina and Chile.(author)

279

Stratigraphy, sedimentology and paleontology of lower Eocene San Jose formation, central San Juan basin, New Mexico  

Energy Technology Data Exchange (ETDEWEB)

The lower Eocene San Jose Formation in the central portion of the San Juan basin (Gobernador-Vigas Canyon area) consists of the Cuba Mesa, Regina, Llaves, and Tapicitos Members. Well log data indicate that, from its 100-m thickness, the Cuba Mesa Member thins toward the basin center and pinches out to the northeast by lat. 36{degree}40'N, long. 107{degree}19'W. The Regina Member has the most extensive outcrops in the central basin, and it decreases in sandstone/mud rock ratio to the north. The Llaves and Tapicitos Members occur only at the highest elevations, are thin due to erosion, and are not mappable as separate units. Well log data and 1,275 m of measured stratigraphic section in the Regina, Llaves, and Tapicitos Members indicate these strata are composed of approximately 35% medium to coarse-grained sandstone and 65% fine-grained sandstone and mud rock. Sedimentology and sediment-dispersal patterns indicate deposition by generally south-flowing streams that had sources to the northwest, northeast, and east. Low-sinuosity, sand-bedded, braided( ) streams shifted laterally across about 1 km-wide channel belts to produce sheet sandstones that are prominent throughout the San Jose Formation. Subtle levees separated channel environments from floodplain and local lacustrine areas. Avulsion relocated channels periodically to areas on the floodplain, resulting in the typically disconnected sheet sandstones within muddy overbank deposits of the Regina Member.

Lucas, S.G.; Smith, L.N. (New Mexico Museum of Natural History, Albuquerque (USA))

1989-09-01

280

La presencia de San Fernando en nuestra medallística / The presence of San Fernando in our medals  

Scientific Electronic Library Online (English)

Full Text Available SciELO Peru | Language: Spanish Abstract in spanish La Facultad de Medicina de San Fernando no solo es la escuela galénica más antigua de nuestro país, sino además es una de las pocas instituciones peruanas que pueden ufanarse de una existencia continua, que se aproxima al bicentenario. Durante una vida institucional tan dilatada, en un país como el [...] Perú, con una rica y secular tradición en la confección de medallas, era de esperarse que algunos de sus principales acontecimientos hayan quedado perennizados por medio de ejemplares conmemorativos. Es gracias a la medallística, es decir, aquella rama de la numismática que estudia todo lo concerniente a las medallas, que podemos darlos a conocer a los peruanos en general, y a la comunidad sanfernandina en particular, a la par de perpetuarlos en estas páginas. Abstract in english San Fernando Medical Faculty is not only the oldest medical school in our country, but also one of the few Peruvian institutions that can boast of a close to two hundred years continuous existence. Throughout an extended institutional life in a country with rich and long medals minting tradition, it [...] is to be expected that some of its main events have been recalled for posterity by commemorative medals. Thanks to that branch of numismatics dealing with the minting and study of medals we can allow Peruvian public and San Fernando alumni in particular to learn on this fascinating subject as well as keeping a written record for the future.

Ricardo, Álvarez.

2008-03-01

281

78 FR 6833 - Final Environmental Impact Statement/Environmental Impact Report for the San Joaquin River...  

Science.gov (United States)

...water from the San Joaquin River Exchange Contractors Water...Joann White, San Joaquin River Exchange Contractors Water...INFORMATION: The San Joaquin River Exchange Contractors Water...wildlife refuges, Central Valley Project (CVP) contractors...Fresno, San Benito, Santa Clara, Tulare,...

2013-01-31

282

Site prospection at san pedro mártir  

Directory of Open Access Journals (Sweden)

Full Text Available Realizamos mediciones climatológicas y de seeing, en 5 sitios dentro del área reservada para uso astronómico en el Parque Nacional Sierra de San Pedro Mártir (SPM, durante al menos 15 noches en cada uno de ellos. Las variables climáticas se midieron con una estación meteorológica Davis y un anemómetro ultrasónico Metek. El seeing fue medido con un RoboDIMM fabricado por NOAO. Las mediciones climatológicas y de seeing fueron comparadas con las obtenidas simultáneamente con la instrumentación del Thirty Meter Telescope Project en el Observatorio Astronómico Nacional (OAN en SPM. Las diferencias de seeing son pequeñas en la mayor parte de los casos. Recomendamos que se realice una campaña de larga duración en Llano Alto 1, ya que es un sitio de fácil acceso y el seeing parece ser ligeramente mejor.

J. Bohigas

2008-01-01

283

Paleomagnetism of San Cristobal Island, Galapagos  

Science.gov (United States)

Isla San Cristobal, the most easterly of the Galapagos Islands, consists of two parts: a large volcano constitutes the southwest half of the island and an irregular apron of small cones and flows makes up the northeast half. As some of the younger flows on the flanks of the large volcano are reversely magnetized, the minimum age of the volcano is 0.7 my, which is the age of the Brunhes-Matuyama reversal boundary. The true age is probably several times greater. The cones and flows to the northeast are all normally magnetized. The between-site angular dispersion of virtual poles is 11.3?? - a value consistent with mathematical models for the latitude dependence of geomagnetic secular variation. ?? 1971.

Cox, A.

1971-01-01

284

del ingreso en San Miguel Coatlán, Oaxaca  

Directory of Open Access Journals (Sweden)

Full Text Available En esta investigación se evalúa una hipótesis que sostiene que en las comunidades rurales la reciente migración internacional ha inducido una mayor desigualdad en la distribución del ingreso (Stark, Taylor y Yitzhaki, 1986. Para analizar el efecto de las remesas internacionales sobre la distribución del ingreso en una muestra de 37% de los hogares en San Miguel Coatlán, Oaxaca, se ha utilizado la descomposición del coeficiente de Gini por fuentes de ingreso. Los resultados muestran que si bien en esta comunidad se advierte una fuerte desigualdad, las remesas mejoran la distribución; la historia migratoria no decide la forma de la distribución, sino que depende más bien de la estructura de los hogares que perciben las remesas, de la importancia de éstas respecto a los demás ingresos, y de ciertas formas culturales que propician la incorpo- ración a la migración de algunos miembros de hogares de todos los estratos económicos de la comunidad.

Renato Salas Alfaro

2013-01-01

285

San Carlos Apache Tribe - Energy Organizational Analysis  

Energy Technology Data Exchange (ETDEWEB)

The San Carlos Apache Tribe (SCAT) was awarded $164,000 in late-2011 by the U.S. Department of Energy (U.S. DOE) Tribal Energy Program's "First Steps Toward Developing Renewable Energy and Energy Efficiency on Tribal Lands" Grant Program. This grant funded: ? The analysis and selection of preferred form(s) of tribal energy organization (this Energy Organization Analysis, hereinafter referred to as "EOA"). ? Start-up staffing and other costs associated with the Phase 1 SCAT energy organization. ? An intern program. ? Staff training. ? Tribal outreach and workshops regarding the new organization and SCAT energy programs and projects, including two annual tribal energy summits (2011 and 2012). This report documents the analysis and selection of preferred form(s) of a tribal energy organization.

Rapp, James; Albert, Steve

2012-04-01

286

Depósitos descheelita asociados a lamprófiros/biotititas departamento San Martín, San Luis / Scheelite oredeposit associated with lamprophyres and biotitite in San Martín District, SanLuis province  

Scientific Electronic Library Online (English)

Full Text Available SciELO Argentina | Language: Spanish Abstract in spanish En el noreste de la sierra deSan Luis se encuentran numerosos yacimientos de wolframio. En el departamentoSan Martín hay tres grupos mineros: Los Avestruces, La Aspereza y CerritoBlanco. La geología del área está constituida por rocas del ComplejoMetamórfico Conlara, compuesto por esquistos cuarzo-m [...] icáceos de rumboaproximado N300º y por granitoides y pegmatitas. Además, hay lamprófiroscalcoalcalinos sobresaturados que conforman cuerpos subverticales de rumboNO-SE a O-E. Hacia la salbanda se incrementa la cantidad de biotita hasta un80-90% constituyendo una roca denominada biotitita que sería producto deprocesos metasomáticos y posterior cataclasis del lamprófiro. La biotititaresulta enriquecida en potasio, rubidio y wolframio, entre otros elementos. Lamineralización scheelítica, en ganga de cuarzo y biotita y/o turmalina, sedispone en vetas lenticulares que se alojan frecuentemente en el contacto entrelamprófiro/biotitita y roca de caja. La scheelita se dispone en ojos en losplanos de esquistosidad de la biotitita y diseminada en el cuarzo. Lamineralización de las venas ha tenido lugar a partir de fluidos de composicióncompleja XH2O: 0,87/0,82 - XCO2: 0,11/0,16 - XNaCl:0,015/0,013 - (CH4) y la scheelita precipitó por un proceso dedesmezcla por debajo de 320°C y 2,3 kb según el estudio de las inclusionesfluidas. La deformación de la fase achaliana y la intrusión del batolito LasChacras-Piedras Coloradas (Devónico a Carbonífero) son los eventos quepromovieron la removilización de fluidos de los sedimentos del basamento, sucanalización en fracturas, y el metasomatismo y la mineralización. Abstract in english Towards thenortheast of the Sierra de San Luis several wolfram ore deposits occur. In SanMartín district they are divided into three groups: Los Avestruces, LaEsperanza and Cerrito Blanco. The geology of this area is formed of the Conlarametamorphic complex composed of schists (with a strike of 300º [...] north),granitoids and pegmatites. In the same area subsaturated chalco-alkalinelamprophyres also appear as subvertical bodies with NW-NE strikes. Toward theboundaries of these rocks, the amount of biotite rises gradually from 80 to 90%developing a biotitite rock due to metasomatic processes and the superimposeddeformation. This biotitite is rich in K, Rb and W among other elements. Thescheelite mineralization (with quartz, biotite and tourmaline as non oreminerals) occurs in veins that are usually hosted between the lamprophyres andthe wall rocks. Scheelite also appears between the schist planes of thebiotitite rocks as well as disseminated crystals in quartz aggregates. Thismineralization took place from fluids with XH2O: 0.87/0.82 - XCO2:0.11/0.16 - XNaCl: 0.015/0.013 - (CH4) meanwhile the scheelite,according to the fluid inclusions studies, precipitated from unmixing processesbelow 320°C and 2.3 kb. Achaliana orogeny and the intrusion of LasChacras-Piedras Coloradas batholiths (Devonian-Carboniferous) were theresponsible for the slight rise of the fluids from the basement, the generationof fault structures through which they rose, the metasomatism and themineralization.

Teresita, Montenegro; Ricardo O., Etcheverry; Pablo R., Leal; Milka K., De Brodtkorb.

2009-06-01

287

VRML Repository: San Diego Supercomputing Center  

Science.gov (United States)

VRML (Virtual Reality Modeling Language) "is a standard language for describing interactive 3-D objects and worlds delivered across the Internet." One of the best and most comprehensive collections of VRML information is the VRML Repository, provided by the San Diego Supercomputing Center. Annotated links are available in the areas of hardware and software; documentation; and worlds, sounds, and textures. There are also links to other sites of interest, mailing lists and newsgroups, and companies and universities. Two of the more useful links from this page are to user's guides and browsers. The browser guide is organized by both version of VRML (1.0 or 2.0) and platform. To understand how to turn your desktop into a virtual .wrl, this is an indispensable site.

288

Depósitos descheelita asociados a lamprófiros/biotititas departamento San Martín, San Luis Scheelite oredeposit associated with lamprophyres and biotitite in San Martín District, SanLuis province  

Directory of Open Access Journals (Sweden)

Full Text Available En el noreste de la sierra deSan Luis se encuentran numerosos yacimientos de wolframio. En el departamentoSan Martín hay tres grupos mineros: Los Avestruces, La Aspereza y CerritoBlanco. La geología del área está constituida por rocas del ComplejoMetamórfico Conlara, compuesto por esquistos cuarzo-micáceos de rumboaproximado N300º y por granitoides y pegmatitas. Además, hay lamprófiroscalcoalcalinos sobresaturados que conforman cuerpos subverticales de rumboNO-SE a O-E. Hacia la salbanda se incrementa la cantidad de biotita hasta un80-90% constituyendo una roca denominada biotitita que sería producto deprocesos metasomáticos y posterior cataclasis del lamprófiro. La biotititaresulta enriquecida en potasio, rubidio y wolframio, entre otros elementos. Lamineralización scheelítica, en ganga de cuarzo y biotita y/o turmalina, sedispone en vetas lenticulares que se alojan frecuentemente en el contacto entrelamprófiro/biotitita y roca de caja. La scheelita se dispone en ojos en losplanos de esquistosidad de la biotitita y diseminada en el cuarzo. Lamineralización de las venas ha tenido lugar a partir de fluidos de composicióncompleja XH2O: 0,87/0,82 - XCO2: 0,11/0,16 - XNaCl:0,015/0,013 - (CH4 y la scheelita precipitó por un proceso dedesmezcla por debajo de 320°C y 2,3 kb según el estudio de las inclusionesfluidas. La deformación de la fase achaliana y la intrusión del batolito LasChacras-Piedras Coloradas (Devónico a Carbonífero son los eventos quepromovieron la removilización de fluidos de los sedimentos del basamento, sucanalización en fracturas, y el metasomatismo y la mineralización.Towards thenortheast of the Sierra de San Luis several wolfram ore deposits occur. In SanMartín district they are divided into three groups: Los Avestruces, LaEsperanza and Cerrito Blanco. The geology of this area is formed of the Conlarametamorphic complex composed of schists (with a strike of 300º north,granitoids and pegmatites. In the same area subsaturated chalco-alkalinelamprophyres also appear as subvertical bodies with NW-NE strikes. Toward theboundaries of these rocks, the amount of biotite rises gradually from 80 to 90%developing a biotitite rock due to metasomatic processes and the superimposeddeformation. This biotitite is rich in K, Rb and W among other elements. Thescheelite mineralization (with quartz, biotite and tourmaline as non oreminerals occurs in veins that are usually hosted between the lamprophyres andthe wall rocks. Scheelite also appears between the schist planes of thebiotitite rocks as well as disseminated crystals in quartz aggregates. Thismineralization took place from fluids with XH2O: 0.87/0.82 - XCO2:0.11/0.16 - XNaCl: 0.015/0.013 - (CH4 meanwhile the scheelite,according to the fluid inclusions studies, precipitated from unmixing processesbelow 320°C and 2.3 kb. Achaliana orogeny and the intrusion of LasChacras-Piedras Coloradas batholiths (Devonian-Carboniferous were theresponsible for the slight rise of the fluids from the basement, the generationof fault structures through which they rose, the metasomatism and themineralization.

Teresita Montenegro

2009-06-01

289

El caso de San Mateo Atenco  

Directory of Open Access Journals (Sweden)

Full Text Available En este artículo se mide el cambio en la productividad durante la década de los años noventa en San Mateo Atenco para un grupo de empresas, descomponiendo a su vez dicho cambio en uno tecnológico, cambio en eficiencia y en escala. A pesar de que el aumento en la productividad fue de sólo 1.2% para los empresarios cuyas empresas fueron evaluadas, la productividad nunca apareció como un factor a considerar a fin de asegurar su permanencia en el mercado. Esto es trascendente ya que esta percepción desincentiva el uso de los apoyos que brindan los programas gubernamentales. Lo anterior sugiere que, el reto de las políticas públicas es conseguir que las empresas encuentren en la productividad el mejor aliado para aumentar su rentabilidad.

Hugo Javier Fuentes Castro

2006-01-01

290

san Andrés, Pinar del Río, Cuba  

Directory of Open Access Journals (Sweden)

Full Text Available El presente trabajo se realizó en la Unidad Forestal San Andrés, en el área que corresponde a las alturas de pizarras, tuvo como objetivo realizar una valoración de diferentes aspectos de su morfología y el endemismo de las especies de plantas leñosas acompañantes en los ecosistemas de pinares naturales presentes en esa zona. Para realizar esta valoración se tomaron en cuenta aspectos como el tipo biológico, la textura de la hoja, el tamaño de la planta, la distribución de la especie y la familia de las especies recolectadas en las zonas de muestreo. Se llegó a la conclusión de que la vegetación acompañante se caracteriza por ser especies de pequeño a mediano tamaño, con hojas medianamente pequeñas, y que no existe entre estas especies ninguna endémica a nivel de distrito o local.

N. Vald\\u00E9s-Rodriguez

2006-01-01

291

Site prospection at San Pedro Mártir  

Scientific Electronic Library Online (English)

Full Text Available SciELO Mexico | Language: English Abstract in spanish Realizamos mediciones climatológicas y de seeing, en 5 sitios dentro del área reservada para uso astronómico en el Parque Nacional Sierra de San Pedro Mártir (SPM), durante al menos 15 noches en cada uno de ellos. Las variables climáticas se midieron con una estación meteorológica Davis y un anemóme [...] tro ultrasónico Metek. El seeing fue medido con un RoboDIMM fabricado por NOAO. Las mediciones climatológicas y de seeing fueron comparadas con las obtenidas simultáneamente con la instrumentación del Thirty Meter Telescope Project en el Observatorio Astronómico Nacional (OAN) en SPM. Las diferencias de seeing son pequeñas en la mayor parte de los casos. Recomendamos que se realice una campaña de larga duración en Llano Alto 1, ya que es un sitio de fácil acceso y el seeing parece ser ligeramente mejor. Abstract in english Seeing and weather observations were conducted at 5 sites within the boundaries of the area reserved for astronomy at the Sierra de San Pedro Mártir National Park (SPM), for at least 15 nights at each one of these. Weather variables were measured using a Davis Weather Station and a Metek Ultrasonic [...] Anemometer. Seeing information was collected with a NOAO RoboDIMM unit. Seeing and weather results were compared to those being delivered at the same time by the instrumentation of the Thirty Meter Telescope Project at the Observatorio Astronómico Nacional (OAN) at SPM. Seeing differences are small in most cases. We recommend a long term campaign at the easily accessible site Llano Alto 1, where we found that seeing may be slightly better.

J, Bohigas; J. M., Núñez; P. F., Guillén; F, Lazo; D, Hiriart; T, Calvario; O, Escoboza; A, Córdova; J, Valdez; E, Sohn.

292

SANS spectra of the fractal supernucleosomal chromatin structure models  

International Nuclear Information System (INIS)

The eukaryotic genome consists of chromatin-a nucleoprotein complex with hierarchical architecture based on nucleosomes, the organization of higher-order chromatin structures still remains unknown. Available experimental data, including SANS spectra we had obtained for whole nuclei, suggested fractal nature of chromatin. Previously we had built random-walk supernucleosomal models (up to 106 nucleosomes) to interpret our SANS spectra. Here we report a new method to build fractal supernucleosomal structure of a given fractal dimension or two different dimensions. Agreement between calculated and experimental SANS spectra was significantly improved, especially for model with two fractal dimensions—3 and 2.

293

Salinity and temperature measurements in San Francisco Bay waters, 1980  

Science.gov (United States)

Measurements of salinity and temperature in waters of the San Francisco Bay estuarine system are presented. Sampling was conducted at selected locations (stations) and depths over the period between January-December 1980 at approximately two week intervals. Stations were located in deep channels and adjacent shallow water areas from Calaveras Point in South San Francisco Bay to the town of Rio Vista on the Sacramento River and to the Three-Mile Slough on the San Joaquin River. Numerical values of salinity, temperature, and station locations are tabulated. Contour maps of deep-channel salinity and temperature are presented and the analytical methods are briefly described.

Dedini, L.A.; Schemel, L.E.; Tembreull, M.A.

1981-01-01

294

Petrographic and geochemical aspects of metamorphic rocks of the sector Barranco de Loba (Serrania de San Lucas)  

International Nuclear Information System (INIS)

The metamorphic rocks that outcrop in the San Lucas foothills (in the area covered by the map identified as number 64), are grouped in two stratigraphic units: The so-called San Lucas Gneiss Formation and the Pinillos Metamorphic Unit (informal stratigraphic denomination). This latter unit is composed by The Armenia Schists and Tapoa Phyllites. The San Lucas Gneiss Formation, comprise quartz-feldspar gneisses (quartz-feldspar gneisses with biotite, quartz-feldspar gneisses with hornblende) and metamorphic rocks (hornblende gneiss, granulites and metagabbros). The Armenia Schists is composed by pelite schists; such as micaceous schists; micaceous schists with andalusite; and calco-silicate schists, quartz rich and with variable amounts of minerals from epidote, hornblende and actinolite groups. The Tapoa Phyllite Rocks are composed by quartz and sericite with altered opaque minerals. The San Lucas Gneiss Formation Metamorphism is regional and reaches the high anfibolite and pyroxene granulites facies. The 1.124Ma ± 22 zircon U-Pb age, indicates a Mesoproterozoic tectonothermal event, related to the Grenville Orogeny that took place during the Rodinia super continent consolidation. The Pinillos Metamorphic Rocks Unit is Early Paleozoic in age, according to the field relations.

295

Oralidad y escritura en la isla de San Andrés / Orality and Writing on San Andrés Island / Oralidade e escrita na ilha de San Andrés  

Scientific Electronic Library Online (English)

Full Text Available SciELO Colombia | Language: Spanish Abstract in portuguese O objetivo deste artigo é elucidar as características da oralidade e da escrita entre os habitantes da Ilha de San Andrés, e se aproximar á relação existente entre elas desde uma perspectiva histórica e antropológica. O povo ilhéu vem de uma tradição oral de origem africana mas, ao mesmo tempo, tem [...] uma herança alfabetizadora tanto inglesa quanto espanhola que tem definido e caracterizado sua oralidade e os usos que têm sido dados à escrita. Este texto baseia-se na documentação bibliográfica e na informação recolhida pela autora durante quatro meses de trabalho etnográfico de campo na ilha de San Andrés. Abstract in spanish El objetivo de este artículo es dilucidar las características de la oralidad y de la escritura entre la gente de la isla de San Andrés y aproximarse a la relación existente entre ellas desde una perspectiva histórica y antropológica. El pueblo isleño proviene de una tradición oral de origen africano [...] , pero, al mismo tiempo, tiene una herencia alfabetizadora tanto inglesa como española que ha definido y caracterizado su oralidad y los usos que le ha dado a la escritura. Este escrito se basa en documentación bibliográfica y en la información recogida por la autora durante cuatro meses de trabajo etnográfico de campo en la isla de San Andrés. Abstract in english The objective of this article is to explain the characteristics of orality and literacy amid the people of San Andrés Island, and to explore the existing relationships among them. The San Andrés people come from an oral tradition with an African origin, and at the same time, they have a literacy inh [...] eritance both from England and from Spain that has defined and characterized their orality and the uses they have given to writing. This article is based on bibliographic documentation and information collected by the author during four months of ethnographic fieldwork in San Andrés Island.

Juliana, Botero Mejía.

2007-12-01

296

Variability in Ground Motions in the San Francisco Bay Urban Area from Large Earthquakes on the San Andreas Fault  

Science.gov (United States)

I use 3-D numerical simulations of kinematic earthquake ruptures to characterize the expected long period (T > 2.0 s) strong ground motions in the San Francisco Bay urban area from large earthquakes on the San Andreas fault. The earthquakes include the 1906 M7.9 San Francisco earthquake and hypothetical variations of the 1906 event with different hypocenters, slip distributions, and rupture speeds. The simulations use finite-elements to discretize a 250 km by 110 km by 45 km volume centered around the San Francisco Bay metropolitan area. Using the USGS 3-D geologic model and corresponding velocity model, the simulations incorporate the 3-D geologic structure, including the nonplanar geometry of the faults, the variation in material properties associated with different rock types and depth, and topography and bathymetry. The simulations suggest that much of the currently urbanized area around San Francisco Bay could be subjected to significantly stronger ground motions in the next large earthquake on the northern San Andreas fault compared with the motions in the simulation of the 1906 event. A hypocenter north of the 1906 hypocenter, which was directly off the coast of San Francisco, increases the rupture directivity for the city of San Francisco and cities around the southern half of the bay, raising the MMI one unit over much of the urban area. Alternatively, if instead of having less than average slip along the San Francisco peninsula as in the 1906 earthquake, this portion of the rupture has greater than average slip, the peninsula is subjected to significantly stronger shaking. In addition to these large-scale effects, some smaller scale effects, such as locally intense shaking in the Cupertino and Santa Rosa areas due to sedimentary basins, are present in all of the scenarios. These results corroborate previous studies that show that variations in rupture directivity and slip have a strong influence on the distribution of ground shaking in areas with complex geologic structure.

Aagaard, B. T.

2006-12-01

297

What can we learn from combined SAXS and SANS measurements of the same sample containing surfactants?  

International Nuclear Information System (INIS)

We review the information gained when studying the same sample containing surfactants by SANS and SAXS. Specific information can be obtained if intensities I(q) are determined and used on absolute scale as well as over a large q-window, thus extending to the > asymptotic range. Comparing SAXS and SANS peak positions (when present) allows unambiguous identification of structure factors separated from underlying form factors. Absolute scale refers to scattering cross-section while resolution relates to the qmax/qmin ratio. Taking into account 'external' knowledge of molecular volumes in constrained fitting from explicit models gives better results on aggregation numbers as well as on interfacial thickness than considering only Patterson functions. We assemble in this review results on adsorption isotherms on surfactant films as well as equations of state, quantifying colloidal interactions. Identification of the topological origin of swelling behaviour are made possible by using combined SAXS and SANS on the largest possible q-range. Best results using this general methodology up to now were obtained by considering data separated from background up to qmax= 0.6 A-1 - 0.8 A-1.

298

SANS investigation of low alloy steels in neutron irradiated, annealed and reirradiated conditions  

International Nuclear Information System (INIS)

Small Angle Neutron Scattering (SANS) experiments were made on several low alloy steels and submerged arc welds prototypic of nuclear reactor vessel construction. The objective was the characterization of radiation-enhanced and/or radiation-induced precipitation contributing to mechanical property changes observed in tensile and notch ductility tests of the materials. The materials were irradiated in the UBR Test Reactor under closely controlled conditions. A portion of the samples were examined in the 288 degrees C irradiated (I) condition; others were examined in the postirradiation annealed (IA) condition and in the 288 degrees C reirradiated (IAR) condition. Experimental variables included material composition (primarily %Cu, %P, %Ni content), postirradiation annealing temperature (454 degrees C and 399 degrees C), reirradiation fluence level, and neutron-dose rate (? 0.08, 0.7 and 9 x 1012 cm-2 s-1, E > 1 MeV). The apparent influence of the described variables on the size, number density and composition of copper-rich precipitates was the primary focus of the SANS analyses. SANS observations are related to measured notch ductility and tensile property changes, with a view toward mechanistic explanation of the observed mechanical property trends for I, IA, and IAR conditions

299

Pteridofitas indicadoras de alteración ambiental en el bosque templado de San Jerónimo Amanalco, Texcoco, México  

Directory of Open Access Journals (Sweden)

Full Text Available Pteridophytes that indicate environmental alteration in the temperate forest of San Jerónimo Amanalco, Texcoco, México. Pteridophytes that indicate environmental alteration in the San Jerónimo Amanalco temperate forest, Texcoco, Mexico. The patterns of distribution of 26 pteridophyte species were studied as possible indicators of environmental alteration in the temperate forest of San Jerónimo Amanalco, Texcoco, State of Mexico. The presence and abundance of the pteridoflora was studied in relation to edaphic, topographic and vegetation variables in 100 sampling locations within an area of 494 hectares. The relationship between these variables was studied using Canonical Correspondence Analysis. Five landscapes were recognized in the study zone according to the degree of deterioration: severe erosion, erosion, mountain with moderate reversible deterioration, mountain with no evident deterioration, and canyon with no evident deterioration. Cheilanthes bonariensis and Pellaea ternifolia are indicators of environmental degradation. The taxa that only grow in landscapes without apparent alteration are Adiantum andicola, Adiantum poiretii, Argyrochosma incana, Asplenium blepharophorum, Dryopteris pseudo filix-mas, Equisetum hyemale and Pteris cretica. Rev. Biol. Trop. 56 (2: 641-656. Epub 2008 June 30.

Lucía Rodríguez Romero

2008-06-01

300

Pteridofitas indicadoras de alteración ambiental en el bosque templado de San Jerónimo Amanalco, Texcoco, México  

Scientific Electronic Library Online (English)

Full Text Available SciELO Costa Rica | Language: Spanish Abstract in spanish Pteridophytes that indicate environmental alteration in the temperate forest of San Jerónimo Amanalco, Texcoco, México. Pteridophytes that indicate environmental alteration in the San Jerónimo Amanalco temperate forest, Texcoco, Mexico. The patterns of distribution of 26 pteridophyte species were st [...] udied as possible indicators of environmental alteration in the temperate forest of San Jerónimo Amanalco, Texcoco, State of Mexico. The presence and abundance of the pteridoflora was studied in relation to edaphic, topographic and vegetation variables in 100 sampling locations within an area of 494 hectares. The relationship between these variables was studied using Canonical Correspondence Analysis. Five landscapes were recognized in the study zone according to the degree of deterioration: severe erosion, erosion, mountain with moderate reversible deterioration, mountain with no evident deterioration, and canyon with no evident deterioration. Cheilanthes bonariensis and Pellaea ternifolia are indicators of environmental degradation. The taxa that only grow in landscapes without apparent alteration are Adiantum andicola, Adiantum poiretii, Argyrochosma incana, Asplenium blepharophorum, Dryopteris pseudo filix-mas, Equisetum hyemale and Pteris cretica. Rev. Biol. Trop. 56 (2): 641-656. Epub 2008 June 30.

Lucía, Rodríguez Romero; Leticia, Pacheco; José Alejandro, Zavala Hurtado.

2008-06-01

301

Sediment transport in the San Francisco Bay Coastal System: an overview  

Science.gov (United States)

The papers in this special issue feature state-of-the-art approaches to understanding the physical processes related to sediment transport and geomorphology of complex coastal–estuarine systems. Here we focus on the San Francisco Bay Coastal System, extending from the lower San Joaquin–Sacramento Delta, through the Bay, and along the adjacent outer Pacific Coast. San Francisco Bay is an urbanized estuary that is impacted by numerous anthropogenic activities common to many large estuaries, including a mining legacy, channel dredging, aggregate mining, reservoirs, freshwater diversion, watershed modifications, urban run-off, ship traffic, exotic species introductions, land reclamation, and wetland restoration. The Golden Gate strait is the sole inlet connecting the Bay to the Pacific Ocean, and serves as the conduit for a tidal flow of ~ 8 × 109 m3/day, in addition to the transport of mud, sand, biogenic material, nutrients, and pollutants. Despite this physical, biological and chemical connection, resource management and prior research have often treated the Delta, Bay and adjacent ocean as separate entities, compartmentalized by artificial geographic or political boundaries. The body of work herein presents a comprehensive analysis of system-wide behavior, extending a rich heritage of sediment transport research that dates back to the groundbreaking hydraulic mining-impact research of G.K. Gilbert in the early 20th century.

Barnard, Patrick L.; Schoellhamer, David H.; Jaffe, Bruce E.; McKee, Lester J.

2013-01-01

302

77 FR 65413 - Certain Cameras and Mobile Devices, Related Software and Firmware, and Components Thereof and...  

Science.gov (United States)

...337-TA-842] Certain Cameras and Mobile Devices, Related Software and Firmware...importation of certain cameras and mobile devices, related software and firmware...San Diego, California; Sony Mobile Communications AB of...

2012-10-26

303

Scientific drilling into the San Andreas Fault Zone - an overview of SAFOD's first five years  

Science.gov (United States)

The San Andreas Fault Observatory at Depth (SAFOD) was drilled to study the physical and chemical processes controlling faulting and earthquake generation along an active, plate-bounding fault at depth. SAFOD is located near Parkfield, California and penetrates a section of the fault that is moving due to a combination of repeating microearthquakes and fault creep. Geophysical logs define the San Andreas Fault Zone to be relatively broad (~200 m), containing several discrete zones only 2–3 m wide that exhibit very low P- and S-wave velocities and low resistivity. Two of these zones have progressively deformed the cemented casing at measured depths of 3192 m and 3302 m. Cores from both deforming zones contain a pervasively sheared, cohesionless, foliated fault gouge that coincides with casing deformation and explains the observed extremely low seismic velocities and resistivity. These cores are being now extensively tested in laboratories around the world, and their composition, deformation mechanisms, physical properties, and rheological behavior are studied. Downhole measurements show that within 200 m (maximum) of the active fault trace, the direction of maximum horizontal stress remains at a high angle to the San Andreas Fault, consistent with other measurements. The results from the SAFOD Main Hole, together with the stress state determined in the Pilot Hole, are consistent with a strong crust/weak fault model of the San Andreas. Seismic instrumentation has been deployed to study physics of faulting—earthquake nucleation, propagation, and arrest—in order to test how laboratory-derived concepts scale up to earthquakes occurring in nature.

Zoback, Mark; Hickman, Stephen; Ellsworth, William; SAFOD Science Team

2011-01-01

304

Quaternary Geochronology, Paleontology, and Archaeology of the Upper San Pedro River Valley, Sonora, Mexico  

Science.gov (United States)

This poster presents the results of multi-disciplinary investigations of the preservation and extent of Quaternary fossil-bearing strata in the San Pedro River Valley in Sonora, Mexico. Geologic deposits in the portions of the San Pedro Valley in southern Arizona contain one of the best late Cenozoic fossil records known in North America and the best record of early humans and extinct mammals on the continent. The basin in the U.S. is one of the type locations for the Blancan Land Mammal Age. Hemiphilian and Irvingtonian fossils are common. Rancholabrean remains are widespread. Strata in the valley adjacent to the international border with Mexico have yielded the densest concentration of archaeological mammoth-kill sites known in the western hemisphere. Despite more than 60 years of research in the U.S., however, and the fact that over one third of the San Pedro River lies south of the international boundary, little has been known about the late Cenozoic geology of the valley in Mexico. The study reported here utilized extensive field survey, archaeological documentation, paleontological excavations, stratigraphic mapping and alluvial geochronology to determine the nature and extent of Quaternary fossil-bearing deposits in the portions of the San Pedro Valley in Sonora, Mexico. The results demonstrate that the Plio-Pleistocene fossil -bearing formations known from the valley in Arizona extend into the uppermost reaches of the valley in Mexico. Several new fossil sites were discovered that yielded the remains of Camelids, Equus, Mammuthus, and other Proboscidean species. Late Pleistocene archaeological remains were found on the surface of the surrounding uplands. AMS radiocarbon dating demonstrates the widespread preservation of middle- to late- Holocene deposits. However, the late Pleistocene deposits that contain the archaeological mammoth-kill sites in Arizona are absent in the valley in Mexico, and are now known to be restricted to relatively small portions of the valley immediately north of the international border.

Gaines, E. P.

2013-12-01

305

Mercury in the gold mining district of San Martin de Loba, South of Bolivar (Colombia).  

Science.gov (United States)

Gold mining is responsible for most Hg pollution in developing countries. The aims of this study were to assess the levels of total Hg (T-Hg) in human hair, fish, water, macrophyte, and sediment samples in the gold mining district of San Martin de Loba, Colombia, as well as to determine fish consumption-based risks for T-Hg ingestion. T-Hg levels were measured by electrothermal atomization and atomic absorption spectroscopy. The overall mean T-Hg level in hair for humans in the mining district of San Martin de Loba was 2.12 ?g/g, whereas for the reference site, Chimichagua, Cesar, it was 0.58 ?g/g. Mean T-Hg levels were not different when considered within localities belonging to the mining district but differed when the comparison included Chimichagua. T-Hg levels in examined locations were weakly but significantly associated with age and height, as well as with fish consumption, except in San Martin de Loba. High T-Hg concentrations in fish were detected in Pseudoplatystoma magdaleniatum, Caquetaia kraussii, Ageneiosus pardalis, Cyrtocharax magdalenae, and Triportheus magdalenae, whereas the lowest appeared in Prochilodus magdalenae and Hemiancistrus wilsoni. In terms of Hg exposure due to fish consumption, only these last two species offer some guarantee of low risk for Hg-related health problems. Water, floating macrophytes, and sediments from effluents near mining sites also had high Hg values. In mines of San Martin de Loba and Hatillo de Loba, for instance, the geoaccumulation index (Igeo) for sediments reached values greater than 6, indicating extreme pollution. In short, these data support the presence of a high Hg-polluted environment in this mining district, with direct risk for deleterious effects on the health of the mining communities. PMID:25354433

Olivero-Verbel, Jesus; Caballero-Gallardo, Karina; Turizo-Tapia, Alexi

2014-10-30

306

La batalla por San Luis: ¿el agua o el oro? La disputa argumentativa contra la Minera San Xavier  

Directory of Open Access Journals (Sweden)

Full Text Available El presente artículo se refiere al conflicto urbano socioambiental entre la sociedad civil de San Luis Potosí y la Minera San Xavier en Cerro de San Pedro (1995-2007. Se aplica la metodología descriptiva del análisis discursivo argumentativo a las diversas esquematizaciones de los actores en torno al "patrimonio", el "agua" y el "cianuro", para contribuir a revelar la topología de las posiciones encontradas, delinear los núcleos de sus representaciones, y comprenderlas como parte sustantiva de la confrontación en un proceso político urbano que articula lo local, lo nacional y lo internacional.

Pedro Reygadas

2008-01-01

307

Forecasting Selenium Discharges to the San Francisco Bay-Delta Estuary: Ecological Effects of A Proposed San Luis Drain Extension  

Science.gov (United States)

Selenium discharges to the San Francisco Bay-Delta Estuary (Bay-Delta) could change significantly if federal and state agencies (1) approve an extension of the San Luis Drain to convey agricultural drainage from the western San Joaquin Valley to the North Bay (Suisun Bay, Carquinez Strait, and San Pablo Bay); (2) allow changes in flow patterns of the lower San Joaquin River and Bay-Delta while using an existing portion of the San Luis Drain to convey agricultural drainage to a tributary of the San Joaquin River; or (3) revise selenium criteria for the protection of aquatic life or issue criteria for the protection of wildlife. Understanding the biotransfer of selenium is essential to evaluating effects of selenium on Bay-Delta ecosystems. Confusion about selenium threats to fish and wildlife stem from (1) monitoring programs that do not address specific protocols necessary for an element that bioaccumulates; and (2) failure to consider the full complexity of the processes that result in selenium toxicity. Past studies show that predators are more at risk from selenium contamination than their prey, making it difficult to use traditional methods to predict risk from environmental concentrations alone. This report presents an approach to conceptualize and model the fate and effects of selenium under various load scenarios from the San Joaquin Valley. For each potential load, progressive forecasts show resulting (1) water-column concentration; (2) speciation; (3) transformation to particulate form; (4) particulate concentration; (5) bioaccumulation by invertebrates; (6) trophic transfer to predators; and (7) effects on those predators. Enough is known to establish a first-order understanding of relevant conditions, biological response, and ecological risks should selenium be discharged directly into the North Bay through a conveyance such as a proposed extension of the San Luis Drain. The approach presented here, the Bay-Delta selenium model, determines the mass, fate, and effects of selenium released to the Bay-Delta through use of (1) historical land-use, drainage, alluvial-fill, and runoff databases; (2) existing knowledge concerning biogeochemical reactions and physiological parameters of selenium (e.g., speciation, partitioning between dissolved and particulate forms, and bivalve assimilation efficiency); and (3) site-specific data mainly from 1986 to 1996 for clams and bottom-feeding fish and birds. Selenium load scenarios consider effluents from North Bay oil refineries and discharges of agricultural drainage from the San Joaquin Valley to enable calculation of (a) a composite freshwater endmember selenium concentration at the head of the estuary; and (b) a selenium concentration at a selected seawater location (Carquinez Strait) as a foundation for modeling. Analysis of selenium effects also takes into account the mode of conveyance for agricultural drainage (i.e., the San Luis Drain or San Joaquin River); and flows of the Sacramento River and San Joaquin River on a seasonal or monthly basis. Load scenarios for San Joaquin Valley mirror predictions made since 1955 of a worsening salt (and by inference, selenium) build-up exacerbated by an arid climate and massive irrigation. The reservoir of selenium in the San Joaquin Valley is sufficient to provide loading at an annual rate of approximately 42,500 pounds of selenium to a Bay-Delta disposal point for 63 to 304 years at the lower range of projections presented here, even if influx of selenium from the California Coast Ranges could be curtailed. Disposal of wastewaters on an annual basis outside of the San Joaquin Valley may slow the degradation of valley resources, but drainage alone cannot alleviate the salt and selenium build-up in the San Joaquin Valley, at least within a century. Load scenarios also show the different proportions of selenium loading to the Bay-Delta. Oil refinery loads from 1986 to 1992 ranged from 8.5 to 20 pounds of selenium per day;

Presser, Theresa S.; Luoma, Samuel N.

2006-01-01

308

San Sebastiani festivali varjutasid hiljutised terroriaktid / Aare Ermel  

Index Scriptorium Estoniae

San Sebastiani rahvusvahelisel filmifestivalil sai Suure Kuldse merikarbi tšiillase Orlando Lubberti film "Takso kolmele". Parima režissööri auhinna pälvis Jean-Pierre Ameris realistliku draamaga "C'est la vie". Ka teistest auhinnatutest

Ermel, Aare, 1957-2013

2001-01-01

309

San Francisco Bay, California as seen from STS-59  

Science.gov (United States)

San Francisco Bay as seen from STS-59. View is oriented with the sea up. The delta of the combined Sacramento and San Joaquin Rivers occupies the foreground with San Francisco Bay in the middle distance, then the Pacific Ocean. Variations in water color caused both by sediment load and by wind streaking strike the eye. Man-made features dominate this scene. The Lafayette/Concord complex is left of the bay head, Vallejo is to the right, the Berkeley/Oakland complex rims the shoreline of the main bay, and San Francisco fills the peninsula beyond. Salt-evaporation ponds contain differently-colored algae depending on salinity. The low altitude (less than 120 nautical miles) and unusually-clear air combine to provide unusually-strong green colors in this Spring scene.

1994-01-01

310

Microstructure of magnetite doped elastomers investigated by SAXS and SANS  

International Nuclear Information System (INIS)

Some recent results on the SAXS and SANS investigations of the magnetic elastomers are presented. Samples were obtained by polymerizing dimethylsiloxane with Fe3O4 ferrofluid in a magnetic field and without magnetic field and characterized by XRD, SANS and SAXS. The SAXS maximum at large angles, obtained from magnetic elastomers, was fitted by using a Pseudo-Voigt function. It was found that the Fe3O4 particles lead to a change of the local structure of the elastomer, meaning the decrease of the quasi-crystalline phase and of the microstrains induced in the matrix. The average particle size obtained from SANS measurements agrees well with the average particle size determined by XRD and SAXS analysis. The splitting of the SANS intensity owing to an additional scattering in zero field reflects the existence of magnetic correlations inside the Q region of 0.005 -1

311

El patrimonio identitario de la comunidad de San Andrés  

OpenAIRE

La identidad y el patrimonio son elementos recurrentes si se quiere defender la cultura frente a un mundo globalizado. Dicha labor debe realizarse de lo local a lo nacional y viceversa. El trabajo aborda el patrimonio de una pequeña comunidad holguinera, el Consejo Popular de San Andrés, cuyo centro es el poblado homónimo. Con un largo devenir histórico, que se remonta a fines del siglo XVI. San Andrés atesora un rico patrimonio, que puede incluirse fundamentalmente dentro de la cultura ...

Ednez, Carlos C. U. F. Rdova Mart U.; Edguez Cruz, Juan Carlos Rodr U.; Pez, Duanis Vel U. E. Zquez L. U. F.

2006-01-01

312

Background to draft SANS 10160 (2009): part 4 seismic loading  

OpenAIRE

This paper provides a critical overview of the background to the revisions which led to the formulation of Part 4, Seismic Loads, of the South African Standard SANS 10160. The paper also presents a comparison to demonstrate the calibration of the standard against other international standards. Eurocode 8 was used as the principle reference for the formulation of the revised clauses. The clauses for seismic design of SANS 10160 are based on the concept of regular buildings with suitable detail...

Wium, J. A.

2010-01-01

313

San Gregorio mining: general presentation of the enterprise  

International Nuclear Information System (INIS)

This work is a project presented by San Gregorio Mine.This company is responsible for the extraction and gold ore deposits benefits in San Gregorio and East extension in Minas de Corrales. For this project was carried out an environmental impact study as well as and agreement with the LATU for the laboratory analyzes and the surface and groundwater monitoring within the Environmental program established by the Company

314

SANS [small-angle neutron scattering] from polymers and colloids  

International Nuclear Information System (INIS)

Small-angle neutron scattering (SANS) has been remarkably successful in providing detailed quantitative structural information on complex everyday materials, such as polymers and colloids, which are often of considerable industrial as well as academic interest. This paper reviews some recent SANS experiments on polymers and colloids, including ferrofluids, and discusses the use of these apparently complex systems as general physical models of the liquid or solid state

315

Neutron detector and SANS development at SAFARI-1  

International Nuclear Information System (INIS)

Position sensitive neutron detectors are an essential part of neutron scattering instruments, hence the development of one-dimensional position sensitive detectors (PSD) for use in small angle neutron scattering (SANS) instruments was carried out as part of an IAEA sponsored collaborative research project. The result was the fabrication and testing of several prototype, 12cm active length, 3He 1-D position sensitive proportional counters with a position resolution and count-rate capability well suited for use in SANS applications. (author)

316

Internal Structure and Weakening Mechanisms of the San Andreas Fault  

OpenAIRE

New observations of the internal structure of the San Gabriel fault (SGF) are combined with previous characterizations of the Punchbowl fault (PF) to evaluate possible explanations for the low frictional strength and seismic characteristics of the San Andreas fault (SAF). The SGF and PF are ancient, large-displacement faults of the SAF system exhumed to depths of 2 to 5 km. These fault zones are internally zoned; the majority of slip was confined to the cores of principal faults, which typica...

Chester, Frederick M.; Evans, James P.; Biegel, Ronald L.

1993-01-01

317

Communications coopératives pour les réseaux ad hoc sans fil  

OpenAIRE

Les réseaux ad hoc sans fil ont reçu une attention considérable due à leurs applications militaires et commerciales. Les limites théorique et pratique des performances des réseaux ad hoc denses dévoilées récemment ont révélé le besoin de techniques alternatives pour améliorer leurs performances, principalement limitées par l'interférence. Cette thèse traite la problématique suivante : comment améliorer la capacité de lien dans les réseaux ad hoc sans fil grâce à des tech...

Fawaz, Nadia

2008-01-01

318

Emissions of organic carbon and methane from petroleum and dairy operations in California's San Joaquin Valley  

Science.gov (United States)

Petroleum and dairy operations are prominent sources of gas-phase organic compounds in California's San Joaquin Valley. It is essential to understand the emissions and air quality impacts of these relatively understudied sources, especially for oil/gas operations in light of increasing US production. Ground site measurements in Bakersfield and regional aircraft measurements of reactive gas-phase organic compounds and methane were part of the CalNex (California Research at the Nexus of Air Quality and Climate Change) project to determine the sources contributing to regional gas-phase organic carbon emissions. Using a combination of near-source and downwind data, we assess the composition and magnitude of emissions, and provide average source profiles. To examine the spatial distribution of emissions in the San Joaquin Valley, we developed a statistical modeling method using ground-based data and the FLEXPART-WRF transport and meteorological model. We present evidence for large sources of paraffinic hydrocarbons from petroleum operations and oxygenated compounds from dairy (and other cattle) operations. In addition to the small straight-chain alkanes typically associated with petroleum operations, we observed a wide range of branched and cyclic alkanes, most of which have limited previous in situ measurements or characterization in petroleum operation emissions. Observed dairy emissions were dominated by ethanol, methanol, acetic acid, and methane. Dairy operations were responsible for the vast majority of methane emissions in the San Joaquin Valley; observations of methane were well correlated with non-vehicular ethanol, and multiple assessments of the spatial distribution of emissions in the San Joaquin Valley highlight the dominance of dairy operations for methane emissions. The petroleum operations source profile was developed using the composition of non-methane hydrocarbons in unrefined natural gas associated with crude oil. The observed source profile is consistent with fugitive emissions of condensate during storage or processing of associated gas following extraction and methane separation. Aircraft observations of concentration hotspots near oil wells and dairies are consistent with the statistical source footprint determined via our FLEXPART-WRF-based modeling method and ground-based data. We quantitatively compared our observations at Bakersfield to the California Air Resources Board emission inventory and find consistency for relative emission rates of reactive organic gases between the aforementioned sources and motor vehicles in the region. We estimate that petroleum and dairy operations each comprised 22% of anthropogenic non-methane organic carbon at Bakersfield and were each responsible for 8-13% of potential precursors to ozone. Yet, their direct impacts as potential secondary organic aerosol (SOA) precursors were estimated to be minor for the source profiles observed in the San Joaquin Valley.

Gentner, D. R.; Ford, T. B.; Guha, A.; Boulanger, K.; Brioude, J.; Angevine, W. M.; de Gouw, J. A.; Warneke, C.; Gilman, J. B.; Ryerson, T. B.; Peischl, J.; Meinardi, S.; Blake, D. R.; Atlas, E.; Lonneman, W. A.; Kleindienst, T. E.; Beaver, M. R.; St. Clair, J. M.; Wennberg, P. O.; VandenBoer, T. C.; Markovic, M. Z.; Murphy, J. G.; Harley, R. A.; Goldstein, A. H.

2014-05-01

319

Ecology of San Francisco Bay tidal marshes: a community profile  

Energy Technology Data Exchange (ETDEWEB)

San Francisco Bay, the largest estuary on the Pacific coast, historically contained an extensive contiguous system of salt and brackish tidal marshes. Urbanization has decreased tidal marshes by 95% and created a patchwork of remnant tidal marshes highly impacted by human activity. This document compiles available published and unpublished scientific literature to describe the current status and ecology of these remaining marshes. Variation in river inflow (strongly seasonal) and individual species salinity tolerances result in gradual and overlapping distributional ranges. Saline marshes are usually dominated by two halophytes: Pacific cordgrass and pickleweed and brackish marshes by bulrushes: Scirpus spp and cattails. Animals are distributed in relation to their salinity tolerances, vegetational habitat requirements, and tidal elevation within the marsh. Distribution of native species is complicated by competitive interactions and frequent dominance by introduced species. Preservation of remaining marshes requires careful management. Habitat requirements for selected species can be incorporated into management practices as well as carefully planned and executed restoration projects. 211 references, 45 figures, 29 tables.

Josselyn, M.

1983-10-01

320

Indoor Air Quality Assessment of the San Francisco Federal Building  

Energy Technology Data Exchange (ETDEWEB)

An assessment of the indoor air quality (IAQ) of the San Francisco Federal Building (SFFB) was conducted on May 12 and 14, 2009 at the request of the General Services Administration (GSA). The purpose of the assessment was for a general screening of IAQ parameters typically indicative of well functioning building systems. One naturally ventilated space and one mechanically ventilated space were studied. In both zones, the levels of indoor air contaminants, including CO2, CO, particulate matter, volatile organic compounds, and aldehydes, were low, relative to reference exposure levels and air quality standards for comparable office buildings. We found slightly elevated levels of volatile organic compounds (VOCs) including two compounds often found in"green" cleaning products. In addition, we found two industrial solvents at levels higher than typically seen in office buildings, but the levels were not sufficient to be of a health concern. The ventilation rates in the two study spaces were high by any standard. Ventilation rates in the building should be further investigated and adjusted to be in line with the building design. Based on our measurements, we conclude that the IAQ is satisfactory in the zone we tested, but IAQ may need to be re-checked after the ventilation rates have been lowered.

Apte, Michael; Bennett, Deborah H.; Faulkner, David; Maddalena, Randy L.; Russell, Marion L.; Spears, Michael; Sullivan, Douglas P; Trout, Amber L.

2008-07-01

321

ASTER Images San Francisco Bay Area  

Science.gov (United States)

These images of the San Francisco Bay region were acquired on March 3, 2000 by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA's Terra satellite. Each covers an area 60 kilometers (37 miles) wide and 75 kilometers (47 miles) long. With its 14 spectral bands from the visible to the thermal infrared wavelength region, and its high spatial resolution of 15 to 90 meters (about 50 to 300 feet), ASTER will image the Earth for the next 6 years to map and monitor the changing surface of our planet.Upper Left: The color infrared composite uses bands in the visible and reflected infrared. Vegetation is red, urban areas are gray; sediment in the bays shows up as lighter shades of blue. Thanks to the 15 meter (50-foot) spatial resolution, shadows of the towers along the Bay Bridge can be seen.Upper right: A composite of bands in the short wave infrared displays differences in soils and rocks in the mountainous areas. Even though these regions appear entirely vegetated in the visible, enough surface shows through openings in the vegetation to allow the ground to be imaged.Lower left: This composite of multispectral thermal bands shows differences in urban materials in varying colors. Separation of materials is due to differences in thermal emission properties, analogous to colors in the visible.Lower right: This is a color coded temperature image of water temperature, derived from the thermal bands. Warm waters are in white and yellow, colder waters are blue. Suisun Bay in the upper right is fed directly from the cold Sacramento River. As the water flows through San Pablo and San Francisco Bays on the way to the Pacific, the waters warm up.Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is one of five Earth-observing instruments launched December 18, 1999, on NASA's Terra satellite. The instrument was built by Japan's Ministry of International Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and the data products. Dr. Anne Kahle at NASA's Jet Propulsion Laboratory, Pasadena, California, is the U.S. Science team leader; Moshe Pniel of JPL is the project manager. ASTER is the only high resolution imaging sensor on Terra. The primary goal of the ASTER mission is to obtain high-resolution image data in 14 channels over the entire land surface, as well as black and white stereo images. With revisit time of between 4 and 16 days, ASTER will provide the capability for repeat coverage of changing areas on Earth's surface.The broad spectral coverage and high spectral resolution of ASTER will provide scientists in numerous disciplines with critical information for surface mapping, and monitoring dynamic conditions and temporal change. Example applications are: monitoring glacial advances and retreats; monitoring potentially active volcanoes; identifying crop stress; determining cloud morphology and physical properties; wetlands evaluation; thermal pollution monitoring; coral reef degradation; surface temperature mapping of soils and geology; and measuring surface heat balance.

2000-01-01

322

A review of circulation and mixing studies of San Francisco Bay, California  

Science.gov (United States)

A description of the major characteristics and remaining unknowns of circulation and mixing in San Francisco Bay has been constructed from a review of published studies. From a broad perspective San Francisco Bay is an ocean-river mixing zone with a seaward flow equal to the sum of the river inflows less evaporation. Understanding of circulation and mixing within the bay requires quantification of freshwater inflows and ocean-bay exchanges, characterization of source-water variations, and separation of the within-bay components of circulation and mixing processes. Description of net circulation and mixing over a few days to a few months illustrates best the interactions of major components. Quantification of tidal circulation and mixing is also necessary because net circulation and mixing contain a large tide-induced component, and because tidal variations are dominant in measurements of stage, currents, and salinity. The discharge of the Sacramento-San Joaquin Delta into Suisun Bay is approximately 90 percent of the freshwater inflow to San Francisco Bay. Annual delta discharge is characterized by a winter season of high runoff and a summer season of low runoff. For the period 1956 to 1985 the mean of monthly discharges exceeded 1,000 cubic meters per second (35,000 cubic feet per second) for the months of December through April, whereas for July through October, it was less than 400 cubic meters per second (14,000 cubic feet per second). The months of November, May, and June commonly were transition months between these seasons. Large year-to-year deviations from this annual pattern have occurred frequently. Much less is known about the ocean-bay exchange process. Net exchanges depend on net seaward flow in the bay, tidal amplitude, and longshore coastal currents, but exchanges have not yet been measured successfully. Source-water variations are ignored by limiting discussion of mixing to salinity. The bay is composed of a northern reach, which is strongly influenced by delta discharge, and South Bay, a tributary estuary which responds to conditions in Central Bay. In the northern reach net circulation is characterized by the river-induced seaward, flow and a resulting gravitational circulation in the channels, and by a tide- and wind-induced net horizontal circulation. A surface layer of relatively fresh water in Central Bay generated by high delta discharges can induce gravitational circulation in South Bay. During low delta discharges South Bay has nearly the same salinity as Central Bay and is characterized by tide- and wind-induced net horizontal circulation. Several factors control the patterns of circulation and mixing in San Francisco Bay. Viewing circulation and mixing over different time-periods and at different geographic scales causes the influences of different factors to be emphasized. The exchange between the bay and coastal ocean and freshwater inflows determine the year-to-year behavior of San Francisco Bay as a freshwater-saltwater mixing zone. Within the bay, exchanges between the embayments control variations over a season. Circulation and mixing patterns within the embayments and the magnitude of river-induced seaward flow influence the between-bay exchanges. The within-bay patterns are in turn determined by tides, winds, and freshwater inflows. Because freshwater inflow is the only factor that can be managed, a major study focus is estimation of inflow-related effects. Most questions relate to the patterns of freshwater inflow necessary to protect valuable resources whose welfare is dependent on conditions in the bay. Among the important questions being addressed are: --What quantity of freshwater inflow is necessary to prevent salt intrusion into the Sacramento-San Joaquin Delta, and what salinity distributions in the bay would result from various inflow patterns? --What quantity of freshwater inflow is sufficient to flush pollutants through the bay? Knowledge of circul

Smith, Lawrence H.

1987-01-01

323

Selected highlights from the 26th San Antonio Breast Cancer Symposium. December 3-6, 2003, San Antonio, TX, USA  

OpenAIRE

The San Antonio Breast Cancer Symposium is one of the largest international meetings devoted solely to breast cancer research. Basic scientists, translational researchers, clinical investigators and physicians share state-of-the-art information on breast cancer covering almost all the aspects of breast cancer, including prevention, aetiology, diagnosis, molecular biology and treatment. The current report describes relevant therapeutic findings that were presented at the 26 th San Antonio Brea...

Aglietta, Massimo

2004-01-01

324

Como güelfos y gibelinos: los colegios de San Bernardo y San Antonio Abad en el Cuzco durante el siglo XVII  

OpenAIRE

This article deals with the conflicts that involved the San Bernardo and San Antonio schools all along the seventeenth century. The author proposes a new approach to explain the social history of colonial Cuzco. He mantains that the root of the confrontation has to do with the privileges that enjoy the jesuits in the provision of academical degrees, a basic requirement to obtain appointments in the civil and eclesiastical administration. To understand this social dinamic, he reconstructs the ...

Guibovich Pe?rez, Pedro M.

2006-01-01

325

Gouvernance : un constat sans concession, quelques solutions sans id?ologie &  

Directory of Open Access Journals (Sweden)

Full Text Available « Le recours ? la notion de gouvernance n est-il qu’une mode, une simple manie sémantique ou bien revêt-elle une réelle densité qui lui ferait partiellement jouer un rôle dans la Cité ???. Cette interrogation n est pas nouvelle mais les réponses apportées par Arnaud Cabanes 1 dans son Essai sur la gouvernance publique (John Saul, 1993, p. 22, sont sans doute les plus fouillées et argumentées publi?es à ce jour. Au fil d’une réflexion exigeante menée en quatre ...

Laurence Lemouzy

2004-06-01

326

Tidal saltmarsh fragmentation and persistence of San Pablo Song Sparrows (Melospiza melodia samuelis): Assessing benefits of wetland restoration in San Francisco Bay  

Science.gov (United States)

The San Pablo Song Sparrow (Melospiza melodia samuelis) is one of three morphologically distinct Song Sparrow subspecies in tidal marshes of the San Francisco Bay estuary. These subspecies are rare, because as the human population has grown, diking and development have resulted in loss of 79% of the historic tidal marshes. Hundreds of projects have been proposed in the past decade to restore tidal marshes and benefit endemic populations. To evaluate the value of these restoration projects for Song Sparrows, we developed a population viability analysis (PVA) model to examine persistence of samuelis subspecies in relation to parcel size, connectivity, and catastrophe in San Pablo Bay. A total of 101 wetland parcels were identified from coverages of modern and historic tidal marshes. Parcels were grouped into eight fragments in the historical landscape and 10 in the present landscape. Fragments were defined as a group of parcels separated by >1 km, a distance that precluded regular interchange. Simulations indicated that the historic (circa 1850) samuelis population was three times larger than the modern population. However, only very high levels (>70% mortality) of catastrophe would threaten their persistence. Persistence of populations was sensitive to parcel size at a carrying capacity of <10 pairs, but connectivity of parcels was found to have little importance because habitats were dominated by a few large parcels. Our analysis indicates little risk of extinction of the samuelis subspecies with the current extent of tidal marshes, but the vulnerability of the small-est parcels suggests that restoration should create larger continuous tracts. Thus, PVA models may be useful tools for balancing the costs and benefits of restoring habitats for threatened tidal-marsh populations in wetland restoration planning.

Takekawa, J.Y.; Sacks, B.N.; Woo, I.; Johnson, M.L.; Wylie, G.D.

2006-01-01

327

The radiological accident in San Salvador  

International Nuclear Information System (INIS)

In February 1989 a radiological accident occurred in San Salvador at an industrial irradiation facility for sterilizing prepackaged medical products. A movable rack holding a 660 TBq (18 kCi) 60Co source jammed in the exposed position. The operator managed to bypass degraded safety systems and enter the irradiation chamber and, with two helpers, free the rack and lower it manually into the storage pool. The three workers were exposed to very high doses and developed acute radiation syndrome. Initial treatment locally and subsequent more sophisticated treatment in Mexico City was effective in countering the acute effects. However, the legs and feet of two men were so seriously injured that amputation was necessary. Moreover, despite the medical efforts, the most exposed worker died six months after the accident from radiation induced lung damage complicated by a lung injury sustained during treatment. As there are more than 160 industrial irradiation facilities throughout the world, some in countries with little or no infrastructure for radiological protection, an international review was undertaken to document the facts and define lessons for all with safety responsibilities at such facilities. The paper provides a brief summary of the findings of that review. (author). 1 ref., 3 figs

328

SYNROC densification: SEM correlation to SANS  

International Nuclear Information System (INIS)

SYNROC is among the first crystalline waste forms introduced to radioactive waste management as alternative host to glass for disposal in underground repository. Variation of densification parameters obtained from scanning electron microscopy of microstructure and small-angle neutron scattering investigation has been correlated in the present paper. Three specimens of SYNROC were characterized. One was green pellet uniaxially compacted powder, two others were hot-isostatically compacted at 1000? 1000 bar and 1300? 1000 bar 2h dwell time respectively. The compactness was found to increase with sintering. The SEM image of microstructures showed the progress towards densification of the samples. The SANS profile suggested that pores in three widely separated length scales were present in the samples. The average radius of the size distributions at three length scales for the green pellet was 300 nm, 75 nm and 10 nm. These values for the first hot compacted sample, get modified to 126 nm, 73 nm and 20 nm, respectively. For the second hot compacted sample, the average radius of the pore size distributions become as 84 nm, 80 nm and 20 nm. It is evident that the larger diameter pores follow the trend of densification. The bigger pores from SEM imaged microstructures also follow the same trend of densification

329

Radiological survey of San Diego Bay  

International Nuclear Information System (INIS)

A radiological survey of three sites in San Diego Bay provided the basis for the following conclusions: 1. Small quantities of Co-60 (0.02-0.05 pCi/g) are present in the bottom sediments in some areas of the harbor at the Submarine Base. Most, if not all, of the Co-60 contamination present probably originated prior to the earlier 1967 survey that reported Co-60 levels as much as 300 times larger than those observed in this study. The highest Co-60 concentration measured is now less than one percent of the normal background radioactivity in harbor sediment samples. 2. No tritium or gamma-ray emitters, other than trace amounts of those occurring naturally, were detected in surface water from the dock areas or in nearby drinking water supplies. 3. Only radionuclides of natural origin and trace amounts of Cs-137 from fallout of previous nuclear weapons tests were detected in samples of kelp, algae, and fish taken from the harbor at the Submarine Base. 4. Gamma-ray surveys of the harbors near the docking areas and along shorelines and beaches near the shipyards failed to detect any exposure rates above background. 3 refs., 4 figs., 3 tabs

330

Cable testing pays off at San Onofre  

International Nuclear Information System (INIS)

The ECAD (Electronic Characterization and Diagnostics) System 1000 was developed by the ECAD Division of Pentek to detect the cause and location of circuit degradation, and to provide the basis for a predictive maintenance and troubleshooting programme. ECAD views a plant circuit as a radio-frequency transmission line with a load, and analyzes reflected electromagnetic pulses in the time domain. This technique, time domain reflectometry (TDR), identifies the distributed resistance, inductance, and capacitance of the circuit, and can accurately detect the location of circuit degradation. ECAD uses direct current or low frequency measurements to indicate circuit degradation by providing the lumped values of circuit loop resistance, shunt resistance, inductance and capacitance. An automatic data acquisition system records the measurements, which form the ECAD database. ECAD measures remotely using a two wire connection to a circuit, with each test taking between 1 and 3 minutes. A quick look data chart then displays circuit descriptive information, lumped element data and the TDR signature. If previous data exists for the device under test, the ECAD computer automatically recalls and prints the baseline data for trend comparisons. ECAD was introduced into the San Onofre PWR in late 1987 after the secondary side of unit 1 had been damaged following a trip caused by the degradation of a 4kV cable. (author)

331

Mercury in San Francisco Bay forage fish  

International Nuclear Information System (INIS)

In the San Francisco Estuary, management actions including tidal marsh restoration could change fish mercury (Hg) concentrations. From 2005 to 2007, small forage fish were collected and analyzed to identify spatial and interannual variation in biotic methylmercury (MeHg) exposure. The average whole body total Hg concentration was 0.052 ?g g-1 (wet-weight) for 457 composite samples representing 13 fish species. MeHg constituted 94% of total Hg. At a given length, Hg concentrations were higher in nearshore mudflat and wetland species (Clevelandia ios, Menidia audens, and Ilypnus gilberti), compared to species that move offshore (e.g., Atherinops affinis and Lepidogobius lepidus). Gut content analysis indicated similar diets between Atherinops affinis and Menidia audens, when sampled at the same locations. Hg concentrations were higher in sites closest to the Guadalupe River, which drains a watershed impacted by historic Hg mining. Results demonstrate that despite differences among years and fish species, nearshore forage fish exhibit consistent Hg spatial gradients. - Total mercury in estuarine forage fish varies with species, habitat, and proximity to a historic mercury mine.

332

SANS study of cellulose extracted from switchgrass.  

Science.gov (United States)

Lignocellulosic biomass, which is an abundant renewable natural resource, has the potential to play a major role in the generation of renewable biofuels through its conversion to bioethanol. Unfortunately, it is a complex biological composite material that shows significant recalcitrance, making it a cost-ineffective feedstock for bioethanol production. Small-angle neutron scattering (SANS) was employed to probe the multi-scale structure of cellulosic materials. Cellulose was extracted from milled native switchgrass and from switchgrass that had undergone a dilute acid pretreatment method in order to disrupt the lignocellulose structure. The high-Q structural feature (Q > 0.07 Å(-1)) can be assigned to cellulose fibrils based on a comparison of cellulose purified by solvent extraction of native and dilute acid pretreated switchgrass and a commercial preparation of microcrystalline cellulose. Dilute acid pretreatment results in an increase in the smallest structural size, a decrease in the interconnectivity of the fibrils and no change in the smooth domain boundaries at length scales larger than 1000 Å. PMID:21041935

Pingali, Sai Venkatesh; Urban, Volker S; Heller, William T; McGaughey, Joseph; O'Neill, Hugh M; Foston, Marcus; Myles, Dean A; Ragauskas, Arthur J; Evans, Barbara R

2010-11-01

333

SANS Study of Cellulose Extracted from Switchgrass  

Energy Technology Data Exchange (ETDEWEB)

AbstractLignocellulosic biomass, an abundant renewable natural resource, has the potential to play a major role in generation of renewable biofuels through its conversion to bio-ethanol. Unfortunately, it is a complex biological composite material that shows significant recalcitrance making it a cost-ineffective feedstock for bioethanol production. Small-angle neutron scattering (SANS) was employed to probe the multi-scale structure of cellulosic materials. Cellulose was extracted from milled native switchgrass and switchgrass that had undergone the dilute acid pretreatment method to disrupt the lignocellulose structure. The high-Q structural feature (Q > 0.07 -1) can be assigned to cellulose fibrils based on comparison with the switchgrass purified by solvent extraction of native and dilute acid pretreated and a commercial preparation of microcrystalline cellulose. Dilute acid pretreatment results in an increase in the smallest structural size, a decrease in the interconnectivity of the fibrils; and no change in the smooth domain boundaries at length scales larger than 1000 .

Pingali, Sai Venkatesh [ORNL; Urban, Volker S [ORNL; Heller, William T [ORNL; McGaughey, Joseph [ORNL; O' Neill, Hugh Michael [ORNL; Foston, Marcus B [ORNL; Myles, Dean A A [ORNL; Ragauskas, Arthur J [ORNL; Evans, Barbara R [ORNL

2010-01-01

334

Carbon Sequestration in Mediterranean Tidal Wetlands: San Francisco Bay and the Ebro River Delta (Invited)  

Science.gov (United States)

Tidal wetlands accumulate soil carbon at relatively rapid rates, in large part because they build soil to counteract increases in sea-level rise. Because of the rapid rates of carbon sequestration, there is growing interest in evaluating carbon dynamics in tidal wetlands around the world; however, few measurements have been completed for mediterranean-type tidal wetlands, which tend to have relatively high levels of soil salinity, likely affecting both plant productivity and decomposition rates. We measured sediment accretion and carbon sequestration rates at tidal wetlands in two mediterranean regions: the San Francisco Bay Estuary (California, USA) and the Ebro River Delta (Catalonia, Spain). Sampling sites within each region represented a range of conditions in terms of soil salinity and plant communities, and these sites serve as potential analogs for long-term carbon sequestration in restored wetlands, which could receive credits under emerging policies for carbon management. Within San Francisco Bay, we collected six sediment cores per site at four salt marshes and two brackish tidal wetlands (two transects with three stations per transect at each site) in order to identify spatial variation both within and among wetlands in the Estuary. At the Ebro Delta, individual sediment cores were collected across 14 tidal wetland sites, including salt and brackish marshes from impounded areas, river mouths, coastal lagoon, and open bay settings. Cores were collected to 50 cm, and cores were dated using 137Cs and 210Pb. Most sites within San Francisco accreted 0.3-0.5 cm/yr, with slightly higher rates of accretion at low marsh stations; accretions rates based on 137Cs were slightly higher than those based on 210Pb, likely because of the shorter time frame covered by 137Cs dating. Accretion rates from the Ebro Delta sites were similar although more variable, with rates based on 137Cs ranging from 0.1 to 0.9 cm/yr and reflecting the wide range of conditions and management history across sites within the Delta. At the San Francisco Bay sites, carbon sequestration rates averaged approximately 80 g/m2/yr over the 100-year time span of 210Pb and as with accretion, were slightly higher for 137Cs-based rates. Variation in long-term carbon sequestration rates across sites and stations within San Francisco Bay was much smaller than the variation in mineral inputs, and there was little difference in carbon sequestration rates among sites, or across stations within San Francisco Bay sites. Carbon sequestration rates from the Ebro Delta were more variable and higher than San Francisco Bay sites, with 137Cs-based rates ranging from 20 to 500 g/m2/yr. Low salinity sites had slightly higher rates of sequestration than salt marsh locations; however, even some salt marsh locations within the Delta had high rates of sequestration (> 200g/m2/yr). As expected high rates of sequestration were associated with locations that had high rates of sediment accretion.

Callaway, J.; Fennessy, S.; Ibanez, C.

2013-12-01

335

Diffusive Soil Degassing of Radon and Carbon Dioxide at San Miguel Volcano, El Salvador, Central America  

Science.gov (United States)

San Miguel volcano is located 15 km to the Southwest of San Miguel City (population ~300,000) and lies on the southern fault of the Central American graben at an intersection with NW-SE faults. The composition of San Miguel lavas varies from olivine-pyroxene basalts for the older lava flows to more andesitic compositions for the more recent products. This volcano have been degassing and having small ash emission since the late nineteen eighties. During December 1999 and January 2000, radon gas concentrations (pCi/l) in soils were measured using a Pylon AB5 radon monitor, and flux of CO2 (g/m2/day) was determined using the accumulation chamber method at 205 sampling stations. High gas emission inside the crater did not allow measurements to be taken in that region. CO2 fluxes throughout the soils of the volcanic edifice show low values compared to other active volcanoes of the world, suggesting that San Miguel is degassing preferentially throughout the summit region. CO2 fluxes range from less than 1 to 14 g/m2/day, with an average value of 5.6 g/m2/day. Radon concentrations range from 2 to 833 pCi/l with an average value of 110 pCi/l. Thoron concentrations range from 20 to 2178 pCi/l with an average value of 362 pCi/l. These values are comparable to radon concentrations found in other active volcanoes (e.g. Cerro Negro, Connor et al., 1996). CO2 flux, radon and thoron concentrations show higher values to the northwest and northeast faulted regions. Some anomalies seem to be related to the contact region between the older and more recent lava flows. Thoron/radon ratios show high anomalies aligning in the NW-SE direction where faulting also occurs. These results suggests that low permeability rocks forming the volcanic edifice of San Miguel volcano do not allow large fluxes of magmatic CO2 to be discharged throughout the soils. Higher permeability at faults and contacts allow slightly larger fluxes of CO2 and radon and thoron concentrations.

Lopez, D. L.; Olmos, R.; Cartagena, R.; Soriano, T.; Barahona, F.

2001-12-01

336

Three-dimensional seismic velocity structure of the San Francisco Bay area  

Science.gov (United States)

Seismic travel times from the northern California earthquake catalogue and from the 1991 Bay Area Seismic Imaging Experiment (BASIX) refraction survey were used to obtain a three-dimensional model of the seismic velocity structure of the San Francisco Bay area. Nonlinear tomography was used to simultaneously invert for both velocity and hypocenters. The new hypocenter inversion algorithm uses finite difference travel times and is an extension of an existing velocity tomography algorithm. Numerous inversions were performed with different parameters to test the reliability of the resulting velocity model. Most hypocenters were relocated Valley Sequence forearc rocks. The thickess of low-velocity sediment is defined, including >12 km under the Sacramento River Delta, 6 km beneath Livermore Valley, 5 km beneath the Santa Clara Valley, and 4 km beneath eastern San Pablo Bay. The Great Valley Sequence east of San Francisco Bay is 4-6 km thick. A relatively high velocity body exists in the upper 10 km beneath the Sonoma volcanic field, but no evidence for a large intrusion or magma chamber exists in the crust under The Geysers or the Clear Lake volcanic center. Lateral velocity contrasts indicate that the major strike-slip faults extend sub vertically beneath their surface locations through most of the crust. Strong lateral velocity contrasts of 0.3-0.6 km/s are observed across the San Andreas Fault in the middle crust and across the Hayward, Rogers Creek, Calaveras, and Greenville Faults at shallow depth. Weaker velocity contrasts (0.1-0.3 km/s) exist across the San Andreas, Hayward, and Rogers Creek Faults at all other depths. Low spatial resolution evidence in the lower crust suggests that the top of high-velocity mafic rocks gets deeper from west to east and may be offset under the major faults. The data suggest that the major strike-slip faults extend sub vertically through the middle and perhaps the lower crust and juxtapose differing lithology due to accumulated strike-slip motion. The extent and physical properties of the major geologic units as constrained by the model should be used to improve studies of seismicity, strong ground motion, and regional stress.

Hole, J. A.; Brocher, T. M.; Klemperer, S. L.; Parsons, T.; Benz, H. M.; Furlong, K. P.

2000-06-01

337

Anthropogenic influence on recent bathymetric change in west-central San Francisco Bay  

Science.gov (United States)

Two multibeam sonar surveys of west-central San Francisco Bay, California, were conducted in 1997 and 2008. Bathymetric change analysis between the two surveys indicates a loss of 14.1 million cubic meters (-3.1 cm/yr-1) of sediment during this time period, representing an approximately three-fold acceleration of the rate that was observed from prior depth change analysis from 1947 to 1979 for all of Central Bay, using more spatially coarse National Ocean Service (NOS) soundings. The portions of the overlapping survey areas between 1997 and 2008 designated as aggregate mining lease sites lost sediment at five times the rate of the remainder of west-central San Francisco Bay. Despite covering only 28% of the analysis area, volume change within leasing areas accounted for 9.2 million cubic meters of sediment loss, while the rest of the area lost 4.9 million cubic meters of sediment. The uncertainty of this recent analysis is more tightly constrained due to more stringent controls on vertical and horizontal position via tightly coupled, inertially aided differential Global Positioning Systems (GPS) solutions for survey vessel trajectory that virtually eliminate inaccuracies from traditional tide modeling and vessel motion artifacts. Further, quantification of systematic depth measurement error can now be calculated through comparison of static surfaces (e.g., bedrock) between surveys using seafloor habitat maps based on acoustic backscatter measurements and ground-truthing with grab samples and underwater video. Sediment loss in the entire San Francisco Bay Coastal System during the last half-century,as estimated from a series of bathymetric change studies, is 240 million cubic meters, and most of this is believed to be coarse sediment (i.e., sand and gravel) from Central Bay and the San Francisco Bar, which is likely to limit the sand supply to adjacent, open-coast beaches. This hypothesis is supported by a calibrated numerical model in a related study that indicates that there is a potential net export of sand-sized sediment across the Golden Gate, suggesting that a reduction in the supply of sand-sized sediment within west-central San Francisco Bay will limit transport to the outer coast.

Barnard, Patrick L.; Kvitek, Rikk G.

2010-01-01

338

Si-Ni-San, a traditional Chinese prescription, and its drug-pairs suppress contact sensitivity in mice via inhibition of the activity of metalloproteinases and adhesion of T lymphocytes.  

Science.gov (United States)

In this paper, the effect of Si-Ni-San, a famous traditional Chinese prescription, on ear contact sensitivity was examined. Si-Ni-San significantly inhibited the ear swelling when administered during the induction phase of picryl-chloride-induced ear contact sensitivity in mice. The adhesion to type I collagen of isolated spleen cells was significantly decreased in the Si-Ni-San group, especially in the presence of protein kinase C activator, phorbol 12,13-dibutyrate. The inhibition of adhesion was seen in purified T cells from the spleen, as well as in Jurkat cells. Furthermore, the adhesion to collagen involves the production of matrix metalloproteinase-2 and -9 in spleen cells, and the oral administration of Si-Ni-San remarkably reduced the matrix metalloproteinase production. Three drug-pairs composed in Si-Ni-San were used for comparison. The combination of Chaihu and Shaoyao showed a similar effect to Si-Ni-San, while Chaihu and Zhishi, and Shaoyao and Gancao only showed a tendency in most situations. These results suggest that Si-Ni-San may contribute to the treatment of immunologically related diseases by down-regulating the activation and function of T lymphocytes, especially the cell adhesion and matrix metalloproteinase production. Its effect is mainly displayed by the combination of Chaihu and Shaoyao. PMID:12841946

Sun, Yang; Chen, Ting; Xu, Qiang

2003-06-01

339

Late Pennsylvanian and early permian chondrichthyan microremains from San Salvador Patlanoaya (Puebla, Mexico)  

Science.gov (United States)

The San Salvador Patlanoaya section (Puebla State, Mexico) is known for its richness of many fossil groups. Among them, the calcareous shells have been principally investigated. This paper deals with Missourian-Virgilian (Late Pennsylvanian) and Leonardian (late Early Permian) Mexican fish remains. A discussion about Helicoprion and related genera, is followed by the systematic description of the revised or discovered taxa: Cooperella typicalis, Moreyella cf. M. typicalis, M. (?) sp., "Sturgeonella" quinqueloba, Hybodontidae gen. sp. 1 and 2, scale indet. Palaeobiogeographic implications are suggested. ?? 2005 Elsevier SAS. All rights reserved.

Derycke-Khatir, C.; Vachard, D.; Degardin, J.-M.; Flores de Dios, A.; Buitron, B.; Hansen, M.

2005-01-01

340

Faire adherer sans argumenter. Manuels scolaires et «Voyages extraordinaires» a la fin dy XIXe siecle  

OpenAIRE

Cet article réfléchit sur les processus discursifs qui permettent de susciter l’adhésion à un certaine idéologie sans passer par les voies classiques de l’argumentation où l’on défend une thèse à l’aide d’une érie d’arguments. Cette réflexion s’appuie sur un exemple tiré de la fin du XIX° siècle, où la doxa tenait pour évidente la supériorité de l’Europe occidentale. On y met en relation deux ensembles discursifs: les manuels de l’école laïque et la séri...

Dominique Mainguenenau

2011-01-01

341

Cianobacterias del embalse San Roque (Córdoba, Argentina) / Cyanobacteria of the San Roque reservoir (Córdoba, Argentina)  

Scientific Electronic Library Online (English)

Full Text Available SciELO Argentina | Language: Spanish Abstract in spanish Este trabajo es una contribución al conocimiento de las cianobacterias presentes en el embalse San Roque y forma parte de un estudio integral de la flora algal del mencionado embalse. Se citan 24 taxa correspondientes a los Ordenes Chroococcales (11), Nostocales (8) y Oscillatoriales (5). Synechocys [...] tis aquatilis, Gloeocapsa rupestris, Gomphosphaeria aponina, Chamaesiphon incrustans f. incrustans, Scytonema crispum, Tolypothrix distorta, Gloeotrichia pisum, Calothrix fusca, Trichodesmium lacustre, Geitlerinema splendidum, Lyngbya aestuarii y Borzia trilocularis son nuevas citas para la zona de estudio. Abstract in english This work is a contribution to the knowledge of the Cyanobacteria present in the San Roque reservoir and forms a part of an integral study of its algal flora. Twenty-four taxa are described and ilustrated: 11 Chroococcales, 8 Nostocales, and 5 Oscillatoriales. Synechocystis aquatilis, Gloeocapsa rup [...] estris, Gomphosphaeria aponina, Chamaesiphon incrustans f. incrustans, Scytonema crispum, Tolypothrix distorta, Gloeotrichia pisum, Calothrix fusca, Trichodesmium lacustre, Geitlerinema splendidum, Lyngbya aestuarii and Borzia trilocularis.

Inés Claudia, Daga; Marcelo Javier, Pierotto.

2011-12-01

342

Geologic report on the San Rafael Swell Drilling Project, San Rafael Swell, Utah  

International Nuclear Information System (INIS)

Twenty-two holes totaling 34,874 feet (10,629.6 meters) were rotary and core drilled on the northern and western flanks of the San Rafael Swell to test fluvial-lacustrine sequences of the Morrison Formation and the lower part of the Chinle Formation. The objective of the project was to obtain subsurface data so that improved uranium resource estimates could be determined for the area. Although the Brushy Basin and the Salt Wash Members of the Morrison Formation are not considered favorable in this area for the occurrence of significant uranium deposits, uranium minerals were encountered in several of the holes. Some spotty or very low-grade mineralization was also encountered in the White Star Trunk area. The lower part of the Chinle Formation is considered to be favorable for potentially significant uranium deposits along the west flank of the San Rafael Swell. One hole (SR-202) east of Ferron, Utah, intersected uranium, silver, molybdenum, and copper mineralization. More exploratory drilling in the vicinity of this hole is recommended. As a result of the study of many geochemical analyses and a careful determination of the lithology shown by drilling, a sabkha environment is suggested for the concentration of uranium, zinc, iron, lead, copper, silver, and perhaps other elements in parts of the Moody Canyon Member of the Moenkopi Formation

343

Estudio geofisico del sector norte de las sierras deSan Luis y de Ulapes: Las Minas, provincia de La Rioja / Geophysical study the northern sector ofSierra de San Luis and Ulapes: Las Minas, province of La Rioja  

Scientific Electronic Library Online (English)

Full Text Available SciELO Argentina | Language: Spanish Abstract in spanish Un lineamiento de anomalíasgravimétricas relativas de Bouguer positivas (exceso de masa), de 60 km delongitud se extiende, con rumbo NNE, entre la localidad de San Francisco delMonte de Oro en la provincia de San Luis hasta el norte de las sierras deUlapes - Las Minas en la provincia de La Rioja. En [...] dicha faja las anomalíasmagnéticas tienen una magnitud similar a las halladas en los afloramientos deanfibolitas de las sierras de Socoscora, provincia de San Luis. Además, sepresenta otro máximo relativo de gravedad entre Villa General Roca y la sierrade Las Minas, sobre el cual las anomalías magnéticas medidas son débiles (casinulas) en concordancia con los valores de susceptibilidad magnéticadeterminados en los afloramientos de granitos, milonitas y gneises de lassierras de Las Minas, Ulapes y Socoscora. Se determinó una marcada coincidenciaentre una anomalía gravimétrica relativa de Bouguer positiva y una estructura(devónica?) con alteración hidrotermal al NE de la localidad de Ulapes. Abstract in english A 60 km long N-NE alignment of relativepositive Bouguer gravimetric anomalies (mass excess) has been recognizedbetween the locality San Francisco del Monte de Oro in San Luis Province and the northern part of Sierra of Ulapes- Las Minas in La Rioja Province. In this belt the magnetic anomalies havem [...] agnitude similar to those measured on the amphibolite outcrops in the Sierrade Socoscora. Another gravimetric maximum appear between Villa General Roca andSierra de Las Minas, which display weak magnetic anomalies (almost cero) inagreement with the magnetic susceptibility values obtained on granites, milonitesand gneissic outcrops from Sierras of Las Minas, Ulapes and Socoscora. There isan excellent correlationship between the relative positive Bouguer gravimetricanomaly in the NE of Ulapes locality and a known (Devonic?) structure withassociated hydrothermal alteration.

Gabriela, Ferracutti; José, Kostadinoff; Ernesto, Bjerg.

2009-06-01

344

Estudio geofisico del sector norte de las sierras deSan Luis y de Ulapes: Las Minas, provincia de La Rioja Geophysical study the northern sector ofSierra de San Luis and Ulapes: Las Minas, province of La Rioja  

Directory of Open Access Journals (Sweden)

Full Text Available Un lineamiento de anomalíasgravimétricas relativas de Bouguer positivas (exceso de masa, de 60 km delongitud se extiende, con rumbo NNE, entre la localidad de San Francisco delMonte de Oro en la provincia de San Luis hasta el norte de las sierras deUlapes - Las Minas en la provincia de La Rioja. En dicha faja las anomalíasmagnéticas tienen una magnitud similar a las halladas en los afloramientos deanfibolitas de las sierras de Socoscora, provincia de San Luis. Además, sepresenta otro máximo relativo de gravedad entre Villa General Roca y la sierrade Las Minas, sobre el cual las anomalías magnéticas medidas son débiles (casinulas en concordancia con los valores de susceptibilidad magnéticadeterminados en los afloramientos de granitos, milonitas y gneises de lassierras de Las Minas, Ulapes y Socoscora. Se determinó una marcada coincidenciaentre una anomalía gravimétrica relativa de Bouguer positiva y una estructura(devónica? con alteración hidrotermal al NE de la localidad de Ulapes.A 60 km long N-NE alignment of relativepositive Bouguer gravimetric anomalies (mass excess has been recognizedbetween the locality San Francisco del Monte de Oro in San Luis Province and the northern part of Sierra of Ulapes- Las Minas in La Rioja Province. In this belt the magnetic anomalies havemagnitude similar to those measured on the amphibolite outcrops in the Sierrade Socoscora. Another gravimetric maximum appear between Villa General Roca andSierra de Las Minas, which display weak magnetic anomalies (almost cero inagreement with the magnetic susceptibility values obtained on granites, milonitesand gneissic outcrops from Sierras of Las Minas, Ulapes and Socoscora. There isan excellent correlationship between the relative positive Bouguer gravimetricanomaly in the NE of Ulapes locality and a known (Devonic? structure withassociated hydrothermal alteration.

Gabriela Ferracutti

2009-06-01

345

75 FR 34481 - Notice of Reestablishment of the Santa Rosa and San Jacinto Mountains National Monument Advisory...  

Science.gov (United States)

...Notice of Reestablishment of the Santa Rosa and San Jacinto Mountains National Monument...reestablished the charter of the Santa Rosa and San Jacinto Mountains National Monument...preparation and implementation of the Santa Rosa and San Jacinto National Monument...

2010-06-17

346

77 FR 55268 - Union Pacific Railroad Company-Acquisition and Operation Exemption-San Pedro Railroad Operating...  

Science.gov (United States)

...Acquisition and Operation Exemption--San Pedro Railroad Operating Company, LLC Union...1) to acquire and operate over San Pedro Railroad Operating Company, LLC's...1\\ In San Pedro Railroad Operating Company,...

2012-09-07

347

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

Science.gov (United States)

...between Los Angeles and San Luis Obispo that is supported...Angeles Union Station and the San Luis Obispo Amtrak Station...Caltrans of the applicable permit and environmental review...Barbara, CA, 93101. San Luis Obispo: January 13,...

2011-01-04

348

Observing the San Andreas Fault at Depth  

Science.gov (United States)

Extending 4 km into the Earth along a diagonal path that crosses the divide between Salinian basement accreted to the Pacific Plate and Cretaceous sediments of North America, the main hole at the San Andreas Fault Observatory at Depth (SAFOD) was designed to provide a portal into the inner workings of a major plate boundary fault. The successful drilling and casing of the main hole in the summer of 2005 to a total vertical depth of 3.1 km make it possible to conduct spatially extensive and long-duration observations of active tectonic processes within the actively deforming core of the San Andreas Fault. In brief, the observatory consists of retrievable seismic, deformation and environmental sensors deployed inside the casing in both the main hole (maximum temperature 135 C) and the collocated pilot hole (1.1 km depth), and a fiber optic strainmeter installed behind casing in the main hole. By using retrievable systems deployed on either wire line or rigid tubing, each hole can be used for a wide range of scientific purposes, with instrumentation that takes maximum advantage of advances in sensor technology. To meet the scientific and technical challenges of building the observatory, borehole instrumentation systems developed for use in the petroleum industry and by the academic community in other deep research boreholes have been deployed in the SAFOD pilot hole and main hole over the past year. These systems included 15Hz omni-directional and 4.5 Hz gimbaled seismometers, micro-electro-mechanical accelerometers, tiltmeters, sigma-delta digitizers, and a fiber optic interferometeric strainmeter. A 1200-m-long, 3-component 80-level clamped seismic array was also operated in the main hole for 2 weeks of recording in May of 2005, collecting continuous seismic data at 4000 sps. Some of the observational highlights include capturing one of the M 2 SAFOD target repeating earthquakes in the near-field at a distance of 420 m, with accelerations of up to 200 cm/s and a static displacement of a few microns. Numerous other local events were observed over the summer by the tilt and seismic instruments in the pilot hole, some of which produced strain offsets of several nanostrain on the fiber optic strainmeter. We were fortunate to observe several episodes of non-volcanic tremor on the 80-level seismic array in May, 2005. These spatially unaliased recordings of the tremor wavefield reveal that the complex tremor time series is comprised of up-and down-going shear waves that produce a spatially stationary interference pattern over time scales of 10s of seconds. All data collected at SAFOD as part of the EarthScope project are open and freely available to all. The Northern California Earthquake Data Center at U.C. Berkeley is the principal data repository for SAFOD. The more than 2 TB of 80-level array data are also available at the IRIS DMC as an assembled data collection.

Ellsworth, W.; Hickman, S.; Zoback, M.; Davis, E.; Gee, L.; Huggins, R.; Krug, R.; Lippus, C.; Malin, P.; Neuhauser, D.; Paulsson, B.; Shalev, E.; Vajapeyam, B.; Weiland, C.; Zumberge, M.

2005-12-01

349

Assessment of aquatic ecological risk and site-specific criteria of copper in San Francisco Bay, California, USA.  

Science.gov (United States)

A new regression-based copper toxicity model was applied in a case study of San Francisco Bay, California, USA, to demonstrate its utility in estimating risk and site-specific water quality criteria. This was accomplished using probabilistic techniques and a simple model relating dissolved organic carbon (DOC) concentrations with the toxicity of dissolved copper to embryos of the most copper sensitive taxon (Mytilus) in the US Environmental Protection Agency's (USEPA) water quality criteria database. Similar probabilistic techniques were applied to data developed for San Francisco Bay using the USEPA's water-effect ratio (WER) methods for comparison with the DOC-based method. Based on 595 site- and date-specific DOC model observations at 26 sites in San Francisco Bay, none suggested risk of chronic toxicity. Safety factors (1/risk quotient) on average across all sites ranged from 2.4 to 9.1. Comparisons were made between 1) estimates of site-specific criteria made using the DOC method, 2) estimates of site-specific criteria made using the WER method, 3) USEPA national and California Toxics Rule criteria, and 4) region-specific criteria recommended for regulatory implementation by the Clean Estuary Partnership. The DOC- and WER-based methods indicated that copper criteria for San Francisco Bay could be increased above USEPA and California Toxics Rule criteria and will retain the level of protection (> or =97%) embodied in the USEPA copper saltwater water quality criteria. The DOC method overall was more conservative (i.e., implies the need for lower criteria in the Bay) than the WER method. The DOC method suggests that the region-specific criteria being recommended for regulatory implementation would be underprotective in some areas and yet could be increased and remain protective in other areas of San Francisco Bay. PMID:17283594

Arnold, W Ray; Warren-Hicks, William J

2007-01-01

350

Producción de flores en la agricultura urbana de San José de las Lajas, Cuba / Flowers production in the urban agriculture of San José de las Lajas, Cuba  

Scientific Electronic Library Online (English)

Full Text Available SciELO Cuba | Language: Spanish Abstract in spanish El creciente aumento en el consumo de flores en el municipio San José de las Lajas ha provocado que se incluyan nuevas especies de flores de corte en los sistemas agrícolas, y con ello nuevas tecnologías de manejo. La capacitación in situ de los agricultores, facilitada por investigadores y por prod [...] uctores con mayor experiencia en este renglón productivo, fue llevada a cabo a través de talleres participativos y visitas de intercambio. Se consiguió incrementar la diversidad en tres especies (clavel chino, rosa y nardo) y se identificaron seis experimentos diseñados y conducidos por los productores y relacionados con la introducción de especies de flores, asociaciones y rotaciones, arreglos espaciales y conservación de semilla Abstract in english The growing increase in the consumption of flowers in the municipality San José de las Lajas has caused that new species of court flowers are included in the agricultural systems, and with it new handling technologies. The training in the farmers’ situ, facilitated by investigators and for producing [...] with more experience in this productive line, it was carried out through shops participatory and exchange visits. It was possible to increase the diversity in three species (chinese carnation, rose and nard) and six designed experiments were identified and driven by the producers and related with the introduction of species of flowers, associations and rotations, space arrangements and seed conservation

Ania, Yong Chou; Eduardo, Calves Somoza; Zoilo, Terán Vidal; Antoliano, Ramírez Medina; Ángel, Leyva Galán; María I, Pavón Rosales.

2014-09-01

351

Déficit hídrico en San Antonio Oeste, Argentina  

Directory of Open Access Journals (Sweden)

Full Text Available Se calcularon los componentes del balance hídrico en San Antonio Oeste (SAO, Argentina. SAO se localiza en el sector Nororiental de la Patagonia, en una zona semiárida de escasa productividad agropecuaria como consecuencia del elevado déficit anual y la insuficiencia del drenaje superficial. El objetivo principal de este trabajo es evaluar el déficit en SAO a partir de metodologías adaptadas a las condiciones de sitio. Para ello se realizaron balances hídricos climáticos normales y secuenciales de acuerdo con Thornthwaite y Matter (1955 en base a datos pertenecientes a la estación SAO del Servicio Meteorológico Nacional. Se seleccionó y calibró el método de estimación de la evapotranspiración potencial más adecuado, mediante una comparación entre cuatro métodos empíricos y FAO Penman-Monteith. Para la caracterización de las condiciones edáficas del terreno se realizó un análisis de textura del suelo y contenido de materia orgánica en tres sitios representativos próximos a la estación SAO. El método de evapotranspiración potencial de Christiansen presentó la mayor correlación (r2=0,994 cuyo error relativo medio es 1,1 y 24,2 % en verano e invierno, respectivamente. Las interrelaciones entre las variables precipitación y evapotranspiración potencial en los balances hídricos normales señalaron volúmenes anuales deficitarios en todos los períodos de análisis (1961-2000 del orden de los 1170 mm. Estos volúmenes ocurren principalmente durante los meses de septiembre a marzo, concentrando más del 80 % del total anual. El período que mostró mayor déficit es el 1971-1980 (1258 mm/año. En contraposición, en los decenios 1981-1990 y 1991-2000 los valores de déficit fueron moderadamente inferiores (approx. 12 % al citado período. Los aportes metodológicos y resultados obtenidos deben ser considerados en las políticas de planificación y manejo del riego, máxime en un contexto económico de creciente diversificación productiva.

Gerardo M.E. Perillo

2010-08-01

352

Sexing the city: The sexual production of non-heterosexual space in Belfast, Manchester and San Francisco  

OpenAIRE

In this paper, Rob Kitchin develops a Foucaultian analysis of the sexual production of no-nheterosexual space, tracing out the contingent and contested nature of socio-sexual relations in three cities: Belfast, Manchester and San Francisco. For each city, a basic historical and geographical analysis is produced, charting how discursive and material processes enacted by state and citizens and operating at different scales (region, nation) are grounded locally in particularized w...

Kitchin, Rob

2002-01-01

353

Improving default rates in Ambulatory Therapeutic Feeding Programmes in operations by Médecins sans Frontières Operational Centre Amsterdam  

OpenAIRE

Severe Acute Malnutrition is a serious medical condition prevalent in many areas with chronic or acute conflict. Organisations providing emergency relief in disaster-struck areas, such as Médecins sans Frontières-Operational Centre Amsterdam (MSF-OCA), have established feeding programmes in many of these countries. Since a predominantly centre-based treatment mode was replaced by an ambulatory treatment approach some of the programmes have been subject to relatively high defaulter rates. De...

Velden, E.

2008-01-01

354

InSAR Permanent Scatterer Analysis Reveals Ups and Downs in San Francisco Bay Area  

Science.gov (United States)

Using new analysis techniques of space-based radar data, surface deformation features caused by various tectonic, geomorphic, and hydrologic processes are imaged in the San Francisco Bay area of California. Uplift is due mainly to sub-mm/yr tectonic upheaval related to slip along and interaction of the complex array of San Andreas transform system faults, while seasonally recharging aquifers account for tens-of-millimeters rise. Observed downward motions are caused by seasonally depleting aquifers, active deep-seated landslides, and rapid settling of unconsolidated sediments and man-made fill alongside the San Francisco Bay. Synthetic aperture radar interferometry (InSAR) from Earth-orbiting spacecraft has revolutionized the field of crustal deformation research since its first geophysical application, about a decade ago. During the last 10 years, InSAR has been used to study a wide range of surface displacements related to active faults, volcanoes, landslides, aquifers, oil fields and glaciers, to name just a few, at a spatial resolution of less than 100 m and centimeter-level precision [see Massonnet and Feigl, 1998; and Bürgmann et al., 2000a for reviews of the InSAR method and applications]. The temporal resolution is limited by the approximately monthly repeat time of satellite flyovers. Due to the viewing geometry of the radar satellite (the beam along which distance changes are measured is oriented at ~23° off vertical), InSAR is particularly sensitive to vertical deformation, but cannot detect displacements parallel to the orbit track. Severe limitations to the InSAR method remain, especially decorrelation of surface scatterers due to vegetation or other surface change processes, incoherence caused by large satellite orbit separations between the two image acquisitions used to make an interferogram, and noise from signal delays in the Earth's atmosphere.

Ferretti, A.; Novali, F.; Bürgmann, R.; Hilley, G.; Prati, C.

2004-08-01

355

San Sebastián de Las Ovejas: pureza perdida y revitalización en el norte neuquino (Argentina)  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Spanish Abstract in spanish En el siguiente artículo desarrollaremos cómo el culto y la fiesta de celebración a San Sebastián en Las Ovejas sufrió en estos últimos años una serie de transformaciones que están en estrecha relación con cambios institucionales de la Iglesia Católica, la vida política y económica de la Argentina y [...] más específicamente de la provincia de Neuquén. La reapertura democrática argentina en 1983, y al casi simultáneo proyecto de integración económica del Cono Sur americano, denominado Mercosur, está implicando que economías nacionales relativamente cerradas se vayan abriendo e integrando en un solo mercado con la finalidad de conseguir mayor competitividad y asegurar mercados. Esto exige que las fronteras internacionales se tornen más permeables. La heterogeneidad de actores (sacerdotes, políticos, devotos, etc.) e intereses (económicos, turísticos, religiosos, etc.) de la fiesta indican su multivocalidad; y como el propio origen de la celebración está ligado al corte de las relaciones intercordilleranas hacia mitad del siglo XX, la devoción a San Sebastián aparece como un mediador entre la localidad y la nación argentina, su pasado chileno y la institucionalidad de la Iglesia Católica. Finalmente, el análisis de la organización y el significado de la celebración nos permite entonces reflexionar sobre ciertas categorías clásicas y en apariencia antagónicas de la antropología como tradición/innovación o conflicto/armonía. Abstract in english In this article we trace the changes undergone by the cult and festival of San Sebastian in Las Ovejas, Neuquén, near the Chilean border, over recent years. There have been a series of transformations intimately related to institutional changes in the Catholic Church, to Argentine political and econ [...] omic life and to local and regional processes. The democratic reopening since 1983 and the almost simultaneous economic integration project for the Southern Cone, called Mercosur, meant the opening of two relatively closed national economies and their gradual integration into a single market, aiming at higher competitiveness and access to international markets. The latter requires international borders to become more permeable. The heterogeneity of actors (priests, politicians, devotees, etc.) and interests (economic, tourist, religious, etc.) involved in the festival indicate its multi-vocal nature. The origin of the celebration is linked to the severing of Trans-Andean relations towards mid 20th Century. San Sebastian’s devotion comes as a mediator between local and Argentine national belonging, its Chilean past and institutionalization under the Catholic Church. An analysis of the organization and meaning of the celebration allows us to reflect upon certain classical and apparently antagonistic anthropological categories, such as tradition and innovation, conflict and harmony.

Rolando, Silla.

2003-07-01

356

Villa San Michele at Capri – a House with a distinct home for "Genius Loci"  

DEFF Research Database (Denmark)

To address the relationship between House & Home from a theoretical perspective we set out on an journey towards Southern Europe; seeking answers to how a fellow Scandinavian here constructed a house, that was built of "Roba di Tiberio" - columns, capitals, fragments of statues - that was dug up on the spot. When we approached Capri by crossing the Neapolitan bay the first thing our eyes saw was the chapel of San Michele resting high above the blue waters at the top of the steep cliffs - on the edge of the abyss. This place is also the location of the Egyptian Sphinx, half lion, half woman; in a transient moment of clarity we had seen her face in our dreams. Capri was the place where eccentrics and wealthy fantasists could exorcize their demons: Goethe, Rilke and Nietzsche loved Capri. The island described by the Scandinavian poet Hans Christian Andersen visiting the Blue Grotta, the personal swimming hole of the Roman emperor Tiberius, as a “Fairy World”, was also the stupendous home of Axel Munthe. At Villa San Michele, entering through the beautiful loggias and the long row of arcades to the chapel that Munthe also restored, our eyes first felt the enigma of the spirit of the place - we wanted to know what happened. When Tiberius lived in his home on the island, the sphinx was already 1000 years old. Now the fantasy creature is on the last outpost of Munthe’s Villa San Michele where it lays majestic, at home, as the guardian spirit of the place – genius loci. It is our thesis that the spirit of the place adjoins a metaphysical core of architecture; and as the very core of architecture could be connected to an absolute truth so it seems that genius loci is related to truth; even though it is a truth that is not directly visible. We ask in this paper if it is a truth that is perennially present? And furthermore with which eyes are we to see this truth? Nietzsche was concerned with truth and the eyes that recognize truth: “There are various eyes. Even the Sphinx has eyes: and as a result there are various truths, and as a result there is no truth.” Let us enhance with the gaze of the Sphinx. For Nietzsche, the Sphinx becomes not the symbol of truth but of “truth”. The will to truth tempts us to many a hazardous enterprise. It is, says Nietzsche, the Sphinx who asks us questionable questions. That day at Villa San Michele we felt the enigma of the spirit of the place, but if we are going to hear the Sphinx ask us questions, all these riddling puzzles, we first have to ask the Sphinx to know how to ask questions. That genius loci are present in architectural theory owes much to the Scandinavian theoretician and architect Christian Norberg-Schulz, who emphasized considerations to the specific characteristics and atmosphere of a place. Is the atmosphere of Villa San Michele thus the key word in the understanding of the physical and metaphysical levels and layers of architectural language in this home of archaeological origin? We focus in our paper with these theoretical views on Villa San Michelethrough an architectural lens and perspective within the frames of House&Home on the language of architecture, and ask; can we explain the language of genius loci in Villa San Michele? Can we hereby clearly see how Axel Munthe - who was not an architect – could build a house at the very core of architecture and create a home caught between reality and dream?

Fisker, Anna Marie; Danielsen, Mads Harder

2014-01-01

357

Fossil content and structural relationships of the San Luis zone and the Caborca zone of NW Sonora, Mexico, suppression of the precambrian Z of Caborca  

International Nuclear Information System (INIS)

In the Caborca region of western Sonora a Precambrian Z does not cover a unique Precambrian socle as previously believed. Two tectonic zones occur there instead: the San Luis Zone and the Caborca Zone. The first is comprised of the Precambrian San Luis socle of gneiss and granite, crossed by 1.1 Ga old anorthosites, the San Luis sedimentary cover, and, above it, a Lower Jurassic volcano-sedimentary sequence. The Caborca Zone consists of the Precambrian Bamori socle of parametamorphic rocks crossed by 1.1 Ga old Aibo granite, and of the Gamuza sedimentary cover. 1.1 Ga ago the two zones were far away from each other. They have been brought together by the Nevadian orogeny. Both zones are allochthonous, and the Caborca Zone is a nappe upon the San Luis Zone. The lowermost units of the Gamuza cover furnished psammocorals and a possible Pterophyllum jageri (?). Accordingly, its geological age is either Palaeozoic or Triassic.The San Luis cover furnished Nematophites [Prototaxites (?) and Nematothallus] from its lower part; Calcispongiae, Cardaicarpus' seeds, and Artisia from its upper part Thus, it is a Devono-Carboniferous unit. The study area belongs in the Baja-Borderland block, which underwent, an Eocene northwards drifting of about 900 - 1000 km, and a 30 celsius degrade to 40 celsius degrade clockwise rotation relative to the main part of Sonora.

358

Deep Borehole Instrumentation Along San Francisco Bay Bridges - 2001  

Energy Technology Data Exchange (ETDEWEB)

This is a progress report on the Bay Bridges downhole network. Between 2 and 8 instruments have been spaced along the Dumbarton, San Mateo, Bay, and San Rafael bridges in San Francisco Bay, California. The instruments will provide multiple use data that is important to geotechnical, structural engineering, and seismological studies. The holes are between 100 and 1000 ft deep and were drilled by Caltrans. There are twenty-one sensor packages at fifteen sites. The downhole instrument package contains a three component HS-1 seismometer and three orthogonal Wilcox 731 accelerometers, and is capable of recording a micro g from local M = 1.0 earthquakes to 0.5 g strong ground motion form large Bay Area earthquakes. This report list earthquakes and stations where recordings were obtained during the period February 29, 2000 to November 11, 2000. Also, preliminary results on noise analysis for up and down hole recordings at Yerba Buena Island is presented.

Hutchings, L.; Kasameyer, P.; Long, L.; McEvilly, T.; Clymer, R.; Urhhammer, R.; Baise, L.

2001-05-01

359

Homopolymers and Micelles in Supercritical CO2 : a SANS Study  

Science.gov (United States)

Supercritical Carbon Dioxide (SC-CO_2) is becoming an attractive alternative to the liquid solvents traditionally used as polymerization media. We have applied small-angle neutron scattering (SANS) to characterize homopolymers and micellar systems in SC-CO_2. Although polymerizations are carried out at high pressures, the penetrating power of the neutron beam means that typical cell windows are virtually transparent. Homopolymers studied include polyfluoro-octyl acrylate (PFOA), hexafluoro-polypropylene oxide and Polydimethyl-siloxane. Also, copolymers of amphiphilic character in CO_2, were characterized via SANS. Systems studied were PFOA-polystyrene diblocks and PFOA-polyethyleneoxide (PFOA-PEO) graft copolymers, which swell as the CO2 medium is saturated with water. This work illustrates the utility of SANS to measure molecular dimensions, thermodynamic variables, molecular weights, micelle structures etc. in supercritical CO_2.

Chillura-Martino, D.; McClain, J. B.; Canelas, D.; Betts, D.; Samulski, E. T.; Desimone, J. M.; Wignall, G. D.; Londono, J. D.; Triolo, R.

1996-03-01

360

UC San Diego researchers discover a new way to target–and kill–proliferating tumors:  

Science.gov (United States)

Researchers at the University of California, San Diego School of Medicine and the UC San Diego Moores Cancer Center have identified a new drug discovery approach enabling the destruction of the most highly proliferative tumors.

361

75 FR 49022 - San Luis & Rio Grande Railroad-Petition for a Declaratory Order  

Science.gov (United States)

...Transportation Board [Docket No. FD 35380] San Luis & Rio Grande Railroad--Petition for a Declaratory Order AGENCY...SUMMARY: In response to a petition filed by the San Luis & Rio Grande Railroad (SLRG), the Board is instituting a...

2010-08-12

362

40 CFR 81.21 - San Francisco Bay Area Intrastate Air Quality Control Region.  

Science.gov (United States)

...Francisco Bay Area Intrastate Air Quality Control Region. 81.21 Section...PURPOSES Designation of Air Quality Control Regions § 81.21 San Francisco Bay Area Intrastate Air Quality Control Region. The San...

2010-07-01

363

76 FR 37044 - Revisions to the California State Implementation Plan, San Joaquin Valley Unified Air Pollution...  

Science.gov (United States)

...Plan, San Joaquin Valley Unified Air Pollution Control District AGENCY: Environmental...the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD...52 Environmental protection, Air pollution control, Intergovernmental...

2011-06-24

364

76 FR 52623 - Revisions to the California State Implementation Plan, San Joaquin Valley Unified Air Pollution...  

Science.gov (United States)

...Plan, San Joaquin Valley Unified Air Pollution Control District AGENCY: Environmental...the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD...52 Environmental protection, Air pollution control, Intergovernmental...

2011-08-23

365

77 FR 66429 - Revisions to the California State Implementation Plan, San Joaquin Valley Unified Air Pollution...  

Science.gov (United States)

...Plan, San Joaquin Valley Unified Air Pollution Control District AGENCY: Environmental...the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD...52 Environmental protection, Air pollution control, Incorporation by...

2012-11-05

366

75 FR 1716 - Revisions to the California State Implementation Plan, San Joaquin Valley Unified Air Pollution...  

Science.gov (United States)

...Plan, San Joaquin Valley Unified Air Pollution Control District AGENCY: Environmental...the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD...authority to regulate sources of air pollution. The fee provision of CAA...

2010-01-13

367

75 FR 57862 - Revisions to the California State Implementation Plan, San Joaquin Valley Unified Air Pollution...  

Science.gov (United States)

...Plan, San Joaquin Valley Unified Air Pollution Control District AGENCY: Environmental...the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD...52 Environmental protection, Air pollution control, Incorporation by...

2010-09-23

368

75 FR 9921 - San Diego County Water Authority Natural Communities Conservation Program/Habitat Conservation...  

Science.gov (United States)

...FWS-R8-ES-2010-N027; 80221-1112-0000-F2] San Diego County Water Authority Natural Communities Conservation Program...SUMMARY: The San Diego County Water Authority (Water Authority/ Applicant) has applied to us, the...

2010-03-04

369

33 CFR 165.1120 - Security Zone; Naval Amphibious Base, San Diego, CA.  

Science.gov (United States)

...Zone; Naval Amphibious Base, San Diego, CA. 165.1120 Section 165.1120 Navigation and Navigable Waters COAST GUARD...Access Areas Eleventh Coast Guard District § 165.1120 Security Zone; Naval Amphibious Base, San...

2010-07-01

370

76 FR 56132 - Revisions to the California State Implementation Plan, San Joaquin Valley Unified Air Pollution...  

Science.gov (United States)

...Agency Region IX, 75 Hawthorne Street, San Francisco...at EPA Region IX, 75 Hawthorne Street, San Francisco...ozone and smog, which harm human health and the...control requirement in effect before November 15...56134

2011-09-12

371

33 CFR 165.1121 - Security Zone: Fleet Supply Center Industrial Pier, San Diego, CA.  

Science.gov (United States)

...2010-07-01 false Security Zone: Fleet Supply Center Industrial Pier, San Diego...District § 165.1121 Security Zone: Fleet Supply Center Industrial Pier, San Diego...following area is a security zone: the...

2010-07-01

372

A strange new disease in San Francisco:a brief history of the city and its response to the HIV/AIDS epidemic.  

Science.gov (United States)

Advancements were made in the understanding of the human immunodeficiency virus (HIV) and the management of patients with the acquired immunodeficiency syndrome (AIDS) in many parts of the United States after such patients were first identified in 1981. Nevertheless, the relatively small city of San Francisco contributed a disproportionate share of them, due largely to the city's inclusive political and community response to the HIV/AIDS epidemic, including the activities of its Department of Public Health and San Francisco General Hospital (SFGH). San Francisco's colorful history, multicultural character, and tradition of tolerance attracted many patients who would develop HIV/AIDS to the city. The same factors underlaid the community's compassionate response when large numbers of these patients needed medical services. These factors also motivated the physicians, nurses, and other health professionals at SFGH who cared for the patients on the world's first inpatient AIDS ward. PMID:23607844

Luce, John M

2013-04-01

373

News Palynology data of the basal section of Formacion San Gregorio located in Paso de las Bochas (I lower permian north basin, Uruguay  

International Nuclear Information System (INIS)

Samples from outcrops and concretions of the locality of Paso de las Bochas on the Negro River, provided new palynologycal data to the basal section of the San Gregorio Formation. At least 10 new ta xa are added for San Gregorio concretions, and some of the cited palynomorphs are mentioned for the first time for Uruguay (Rattiganispora minor, Waltzispora pol ita). Moreover, some of the found ta xa have been mentioned for glacial deposits related to the Carboniferous-Permian boundary in other Gondwana regions (p.e. Psomospora detect a, Waltzispora pol ita). The preliminary results reached here allow to admit the hypothesis of the existence of carboniferous dee posits on the Uruguayan territory whose were eroded or not yet recognized. Keywords: San Gregorio Formation, Carboniferous

374

77 FR 66462 - Proposed CERCLA Settlement Relating to the Digital Equipment Corp. Site a/k/a the PCB Horizon...  

Science.gov (United States)

...Settlement Relating to the Digital Equipment Corp. Site a/k/a the PCB Horizon Site in San German, PR AGENCY: Environmental Protection...with the Digital Equipment Corp. Superfund Site, a/k/a the PCB Horizon Site (``Site''), located in San German,...

2012-11-05

375

Uranium mineralization in the San Marcos Volcanic Centre, Chihuahua, Mexico  

International Nuclear Information System (INIS)

The Eocene San Marcos silicic volcanic centre contains about 30 radiometric anomalies, the most important of which are the San Marcos and Victorino uranium prospects. The volcanic centre is located in the eastern foothills of the Sierra Madre Occidental, 30 km northwest of the Chihuahua City. Volcanic activity began with eruption of the rhyodacitic Victorino Ignimbrite leading to collapse of the 20-km diameter San Marcos Caldera. A second stage of plinian eruptions at 46 million years led to collapse of the 5x15 km Tinaja Graben within the larger San Marcos Caldera. More that 200 m of rhyolitic Quintas Ignimbrite accumulated within this graben. A still smaller nested graben developed inside the Tinaja Graben, in which volcaniclastic deposits and a small volume of ignimbrite accumulated. Later volcanism led to the accumulation of extensive air falls. Ryolite domes erupted in different portions of the San Marcos volcanic centre throughout its history. Finally, the eastern half of the centre was down-faulted by a north-south striking range-front fault and was covered by alluvium. The San Marcos prospect is hosted by the Quintas Ignimbrite, and is interpreted to be the upper level of a vein system comprising two alteration events. The Victorino prospect is a stockwork developed in locally pyritized Victorino Ignimbrite. Wall rocks are haematitically altered. Pitchblende, now partially rimmed by uranophane, was precipitated probably by reduction of the ore fluids during rey by reduction of the ore fluids during reaction with magnetite-bearing, densely welded portions of the ignimbrite and/or with the pyrite-bearing portions. At other prospects in the volcanic centre, disseminated uranophane occurs in fault breccias, along intrusive dome contacts, and as small mantos in air falls and ignimbrites

376

Variability of fault slip behavior along the San Andreas Fault in the San Juan Bautista Region  

Science.gov (United States)

improved understanding of the time history of fault slip at depth is an essential step toward understanding the underlying mechanics of the faulting process. Using a waveform cross-correlation approach, we document spatially and temporally varying fault slip along the northernmost creeping section of the San Andreas Fault near San Juan Bautista (SJB), California, by systematically examining spatiotemporal behaviors of characteristically repeating earthquakes (CREs). The spatial distribution of pre-1998 SJB earthquake (1984-1998) fault slip rate inferred from the CREs reveals a ~15 km long low creep or partially locked section located near the 1998 Mw 5.1 SJB earthquake rupture. A finite-fault slip inversion reveals that the rupture of the 1998 SJB earthquake is characterized by the failure of a compact ~4 km2 asperity with a maximum slip of about 90 cm and corresponding peak stress drop of up to 50 MPa, whereas the mean stress drop is about 15 MPa. Following the 1998 earthquake, the CRE activity was significantly increased in a 5-10 km deep zone extending 2-7 km northwest of the main shock, which indicates triggering of substantial aseismic slip. The postseismic slip inferred from the CRE activity primarily propagated to the northwest and released a maximum slip of 9 cm. In this 5-10 km depth range, the estimated postseismic moment release is 8.6 × 1016 N m, which is equivalent to Mw 5.22. The aseismic slip distribution following the 1998 earthquake is not consistent with coseismic stress-driven afterslip but represents a triggered, long-lasting slow earthquake.

Taira, Taka'aki; Bürgmann, Roland; Nadeau, Robert M.; Dreger, Douglas S.

2014-12-01

377

Chondrichthyans of the San Matías Gulf, Patagonia, Argentina Los condrictios del Golfo San Matías, Patagonia, Argentina  

Directory of Open Access Journals (Sweden)

Full Text Available The San Matías Gulf (SMG; 41°- 42° S; 64°- 65° W is the largest gulf in Northern Patagonia, Argentina. Up to date, the chondrichthyan fauna of this area has not been reported. Therefore, the aim of this work is to provide a list with species presence and biological characteristics of the chondrichthyans recorded in SMG during the last 30 years. A total of 13 sharks distributed in 11 families, 19 skates and rays distributed in six families, and one holocephalan have been so far recorded in SMG. From the zoogeographical point of view, this chondrichthyan fauna is a mixed assemblage of species typically found in the Argentinean and Magellanean Provinces. The holocephalan Callorhinchus callorynchus is the most landed chondricthyan of the local fishery. With it, five sharks and seven skates are also exploited.El Golfo San Matías (SMG; 41°- 42° S - 64°-65° O se encuentra ubicado en el norte de la Patagonia, Argentina. Hasta la fecha no se cuentan con reportes de la fauna de condrictios de esta zona. Por lo tanto, el objetivo de este trabajo es proporcionar una lista de la presencia y las características biológicas de los condrictios registrados en el SMG durante los últimos 30 años. Un total de 13 tiburones distribuidos en 11 familias, 19 batoideos distribuidos en seis familias y un holocefalo han sido reportados para la zona. Desde el punto de vista zoogeográfico, el SMG presenta un ensamble de especies pertenecientes a las Provincias Magallánica y Argentina. El holocefalo Callorhinchus callorynchus es el condrictio más desembarcado de la pesquería local. Con menor importancia son explotadas comercialmente, cinco especies de tiburones y siete de rayas.

María R PERIER

2011-12-01

378

Chondrichthyans of the San Matías Gulf, Patagonia, Argentina / Los condrictios del Golfo San Matías, Patagonia, Argentina  

Scientific Electronic Library Online (English)

Full Text Available SciELO Argentina | Language: English Abstract in spanish El Golfo San Matías (SMG; 41°- 42° S - 64°-65° O) se encuentra ubicado en el norte de la Patagonia, Argentina. Hasta la fecha no se cuentan con reportes de la fauna de condrictios de esta zona. Por lo tanto, el objetivo de este trabajo es proporcionar una lista de la presencia y las características [...] biológicas de los condrictios registrados en el SMG durante los últimos 30 años. Un total de 13 tiburones distribuidos en 11 familias, 19 batoideos distribuidos en seis familias y un holocefalo han sido reportados para la zona. Desde el punto de vista zoogeográfico, el SMG presenta un ensamble de especies pertenecientes a las Provincias Magallánica y Argentina. El holocefalo Callorhinchus callorynchus es el condrictio más desembarcado de la pesquería local. Con menor importancia son explotadas comercialmente, cinco especies de tiburones y siete de rayas. Abstract in english The San Matías Gulf (SMG; 41°- 42° S; 64°- 65° W) is the largest gulf in Northern Patagonia, Argentina. Up to date, the chondrichthyan fauna of this area has not been reported. Therefore, the aim of this work is to provide a list with species presence and biological characteristics of the chondricht [...] hyans recorded in SMG during the last 30 years. A total of 13 sharks distributed in 11 families, 19 skates and rays distributed in six families, and one holocephalan have been so far recorded in SMG. From the zoogeographical point of view, this chondrichthyan fauna is a mixed assemblage of species typically found in the Argentinean and Magellanean Provinces. The holocephalan Callorhinchus callorynchus is the most landed chondricthyan of the local fishery. With it, five sharks and seven skates are also exploited.

María R, PERIER; Marilú, ESTALLES; Nidia M, COLLER; Matías N, SUAREZ; Gimena J, MORA; Edgardo E, DI GIÁCOMO.

2011-12-01

379

Evidence for thyroid endocrine disruption in wild fish in San Francisco Bay, California, USA. Relationships to contaminant exposures.  

Science.gov (United States)

It is well documented that many coastal and estuarine environments adjacent to developed and industrialized urban centers, such as the San Francisco Bay Area, are significantly contaminated by anthropogenic chemicals. However, it is not well understood to what extent existing contaminants, many with continuing inflows into the environment, may impact exposed wildlife. This study provided an initial characterization of thyroid endocrine-related effects and their relationship to accumulated contaminants in two indigenous fish species sampled from different San Franicsco Bay Area study sites. Plasma concentrations of thyroxine (T4) were significantly reduced in fish sampled from highly impacted locations such as Oakland Inner Harbor and San Leandro Bay as compared with fish from other locations representing relatively lower human impact, including Bodega Bay, Redwood City and a remote site on Santa Catalina Island. Triiodothyronine (T3) levels also varied significantly by location, with differing T3/T4 ratios in fish from some locations suggestive of altered peripheral deiodinase activity. The changes in thyroid endocrine parameters were significantly correlated with hepatic concentrations of certain environmental contaminants. A large number of polychlorinated biphenyl (PCB) congeners, both co-planar (dioxin-like) and non-co-planar, exhibited significant inverse correlations with T4 levels in the fish, while in contrast, T3 and T3/T4 ratio were positively correlated with PCB exposures. The positive correlation between T3/T4 ratio and PCBs supports the hypothesis that environmental PCBs may alter T4 deiodination or turnover, actions of PCBs reported in laboratory experiments. Some relationships between chlorinated pesticides including DDT and chlordanes, but fewer relationships with PAHs, were also observed. Together, these findings indicate that the thyroid endocrine system is exhibiting alterations associated with different aquatic environments in the San Francisco Bay Area, which are significantly related to current-day exposures of the fish to contaminant chemicals such as PCBs. PMID:19939474

Brar, Navdeep K; Waggoner, Claire; Reyes, Jesus A; Fairey, Russell; Kelley, Kevin M

2010-02-18

380

Gravity data from the San Pedro River Basin, Cochise County, Arizona  

Science.gov (United States)

The U.S. Geological Survey, Arizona Water Science Center in cooperation with the National Oceanic and Atmospheric Administration, National Geodetic Survey has collected relative and absolute gravity data at 321 stations in the San Pedro River Basin of southeastern Arizona since 2000. Data are of three types: observed gravity values and associated free-air, simple Bouguer, and complete Bouguer anomaly values, useful for subsurface-density modeling; high-precision relative-gravity surveys repeated over time, useful for aquifer-storage-change monitoring; and absolute-gravity values, useful as base stations for relative-gravity surveys and for monitoring gravity change over time. The data are compiled, without interpretation, in three spreadsheet files. Gravity values, GPS locations, and driving directions for absolute-gravity base stations are presented as National Geodetic Survey site descriptions.

Kennedy, Jeffrey R.; Winester, Daniel

2011-01-01

381

First experiences with large SAN storage and Linux  

International Nuclear Information System (INIS)

The use of a storage area network (SAN) with Linux opens possibilities for scalable and affordable large data storage and poses a new challenge for cluster computing. The GridKa center uses a commercial parallel file system to create a highly available high-speed data storage using a combination of Fibre Channel (SAN) and Ethernet (LAN) to optimize between data throughput and costs. This article describes the design, implementation and optimizations of the GridKa storage solution which will offer over 400 TB online storage for 600 nodes. Presented are some throughput measurements of one of the largest Linux-based parallel storage systems in the world

382

Una réplica inédita de Zurbarán de un San Carmelo  

Directory of Open Access Journals (Sweden)

Full Text Available The recent appearance of a replica of an unpublished painting by Zurbarán of Saint Carmelo allows for the reconstruction of the De Profundis hall of the Convent of Shod Mercedarians in Seville. Originally this painting was paired there with Saint Serapis, today in the Wadsworth Atheneum of Hartford, Connecticutt (USA.La aparición de una réplica de una pintura de Zurbarán inédita que representa a San Carmelo, permite la reconstrucción de la decoración de la sala De Profundis del Convento de la Merced Calzada de Sevilla. Allí esta pintura formaba pareja con el San Serapio conservado actualmente en el Wadsworth Atheneum de Hartford (USA.

Valdivieso, Enrique

2010-09-01

383

Retrato de estudio. Hombre con barba y bigote. San Sebastián.  

OpenAIRE

1 fot.; papel; imagen 10,7 x 16,7 cm. - Retrato de estudio. Hombre con barba y bigote. San Sebastián. (Albúmina ferrotipada montada sobre cartulina, medida total 10,7 x 16,7. Imagen rozada. Dedicatoria manuscrita a tinta negra en margen inferior: "A mi amigo Miguel de Unamuno, en testimonio de profundo afecto. Anto. Agín?". Sello impreso del fotógrafo en margen inferior de cartulina: "H. Otero, Sn. Sebastián" y en reverso: "H. Otero, Alameda, 11 - San Sebastián"). - Procedencia: fondo M...

Otero, H.

2010-01-01

384

Emissions of organic carbon and methane from petroleum and dairy operations in California's San Joaquin Valley  

Directory of Open Access Journals (Sweden)

Full Text Available Petroleum and dairy operations are prominent sources of gas-phase organic compounds in California's San Joaquin Valley. Ground site measurements in Bakersfield and aircraft measurements of reactive gas-phase organic compounds were made in this region as part of the CalNex (California Research at the Nexus of Air Quality and Climate Change project to determine the sources contributing to regional gas-phase organic carbon emissions. Using a combination of near-source and downwind data, we assess the composition and magnitude of emissions from these prominent sources that are relatively understudied compared to motor vehicles We also developed a statistical modeling method with the FLEXPART-WRF transport and meteorological model using ground-based data to assess the spatial distribution of emissions in the San Joaquin Valley. We present evidence for large sources of paraffinic hydrocarbons from petroleum extraction/processing operations and oxygenated compounds from dairy (and other cattle operations. In addition to the small straight-chain alkanes typically associated with petroleum operations, we observed a wide range of branched and cyclic alkanes that have limited previous in situ measurements or characterization in emissions from petroleum operations. Observed dairy emissions were dominated by ethanol, methanol, and acetic acid, and methane. Dairy operations were responsible for the vast majority of methane emissions in the San Joaquin Valley; observations of methane were well-correlated with non-vehicular ethanol, and multiple assessments of the spatial distribution of emissions in the San Joaquin Valley highlight the dominance of dairy operations for methane emissions. The good agreement of the observed petroleum operations source profile with the measured composition of non-methane hydrocarbons in unrefined natural gas associated with crude oil suggests a fugitive emissions pathway during petroleum extraction, storage, or processing with negligible coincident methane emissions Aircraft observations of emission hotspots from operations at oil wells and dairies are consistent with the statistical source footprint determined via transport modeling and ground-based data. At Bakersfield, petroleum and dairy operations each comprised 22–23% of anthropogenic non-methane organic carbon and were each responsible for ~12% of potential precursors to ozone, but their direct impacts as potential SOA precursors were estimated to be minor. A comparison with the California Air Resources Board emission inventory supports the current relative emission rates of reactive organic gases from these sources in the region.

D. R. Gentner

2013-10-01

385

Hydrogeochemical and Stream Sediment Reconnaissance basic data for San Antonio NTMS Quadrangle, Texas  

International Nuclear Information System (INIS)

Results of a reconnaissance geochemical survey of the San Antonio Quadrangle, Texas, are reported. Field and laboratory data are presented for 781 groundwater samples, 541 stream sediment samples, and 331 stream water samples. Statistical and areal distributions of uranium and other possible uranium-related variables are displayed. A generalized geologic map of the survey area is provided and pertinent geologic factors which may be of significance in evaluating the potential for uranium mineralization are briefly discussed. Based on results from groundwater and stream water samples, extensive areas within the San Antonio Quadrangle are producing water from saline environments. These areas are located southeast of the Balcones Escarpment. These saline environments delineate a northeast-southwest trend which coincides predominately with the outcrop of the Upper Cretaceous Formations and the formations of the Midway and Wilcox Groups of Tertiary Age. Results from stream sediment samples indicate that high uranium values occur predominately in the southeast corner of the quadrangle. The high values of uranium that occur in this area are associated with the Tertiary Formations, most notably the Carrizo Sand of the Claiborne Group. High uranium values associated with the Carrizo Sand appear to be related to heavy and/or resistate minerals

386

SANS study of PLA-mPEG core-shell structured nanoparticles for targeted drug delivery  

International Nuclear Information System (INIS)

Full text: Colorectal cancer (CRC), referring to cancers that affect the colon and the rectum, is the third most common form of cancer and second leading cause of cancer-related death in the western world (Fortina et al 2007). Currently there are many therapeutic methods, however, most of the traditional methods have enormous side effects, partly because they significantly damage the healthy cells. Therefore, there is an urgent demand to develop a more effective drug delivery mechanism to alleviate these side effects. PLA-mPEG core-shell nanoparticles will be used to deliver the therapeutic agent to the specific area. Materials preparation will include the deuteration of L-Iactic acid monomer and ring opening polymerization to prepare the block copolymer. The drug loaded nanoparticles will be fabricated by double emulsion and solvent evaporation method. The processing parameters will be varied and optimized to maximize the encapsulation efficiency and drug loading. With SANS, we will identify the internal structure of PLA-mPEG nanoparticles with a diameter of 50-100nm, an important aspect to control the release of the drugs. At the same time, we will relate how the different process parameters affect the core size. The relationship between drug release profile and structure of the encapsulation materials will also be studied using the data from SANS.

387

The distribution of modified mercalli intensity in the 18 April 1906 San Francisco earthquake  

Science.gov (United States)

We analyze Boatwright and Bundock's (2005) modified Mercalli intensity (MMI) map for the 18 April 1906 San Francisco earthquake, reviewing their interpretation of the MMI scale and testing their correlation of 1906 cemetery damage with MMI intensity. We consider in detail four areas of the intensity map where Boatwright and Bundock (2005) added significantly to the intensity descriptions compiled by Lawson (1908). We show that the distribution of off-fault damage in Sonoma County suggests that the rupture velocity approached the P-wave velocity along Tomales Bay. In contrast, the falloff of intensity with distance from the fault appears approximately constant throughout Mendocino County. The intensity in Humboldt County appears somewhat higher than the intensity in Mendocino County, suggesting that the rupture process at the northern end of the rupture was relatively energetic and that there was directivity consistent with a subsonic rupture velocity on the section of the fault south of Shelter Cove. Finally, we show that the intensity sites added in Santa Cruz County change the intensity distribution so that it decreases gradually along the southeastern section of rupture from Corralitos to San Juan Bautista and implies that the stress release on this section of rupture was relatively low.

Boatwright, J.; Bundock, H.

2008-01-01

388

Empirical evidence for synchrony in the evolution of TB cases and HIV+ contacts among the San Francisco homeless.  

Science.gov (United States)

The re-emergence of tuberculosis (TB) in the mid-1980s in many parts of the world, including the United States, is often attributed to the emergence and rapid spread of human immunodeficiency virus (HIV) and acquired immunodeficiency syndrome (AIDS). Although it is well established that TB transmission is particularly amplified in populations with high HIV prevalence, the epidemiology of interaction between TB and HIV is not well understood. This is partly due to the scarcity of HIV-related data, a consequence of the voluntary nature of HIV status reporting and testing, and partly due to current practices of screening high risk populations through separate surveillance programs for HIV and TB. The San Francisco Department of Public Health, TB Control Program, has been conducting active surveillance among the San Francisco high-risk populations since the early 1990s. We present extensive TB surveillance data on HIV and TB infection among the San Francisco homeless to investigate the association between the TB cases and their HIV+ contacts. We applied wavelet coherence and phase analyses to the TB surveillance data from January 1993 through December 2005, to establish and quantify statistical association and synchrony in the highly non-stationary and ostensibly non-periodic waves of TB cases and their HIV+ contacts in San Francisco. When stratified by homelessness, we found that the evolution of TB cases and their HIV+ contacts is highly coherent over time and locked in phase at a specific periodic scale among the San Francisco homeless, but no significant association was observed for the non-homeless. This study confirms the hypothesis that the dynamics of HIV and TB are significantly intertwined and that HIV is likely a key factor in the sustenance of TB transmission among the San Francisco homeless. The findings of this study underscore the importance of contact tracing in detection of HIV+ individuals that may otherwise remain undetected, and thus highlights the ever-increasing need for HIV-related data and an integrative approach to monitoring high-risk populations with respect to HIV and TB transmission. PMID:20107514

Mohtashemi, Mojdeh; Kawamura, L Masae

2010-01-01

389

Números cromosómicos de Asteraceae de la Reserva Ecológica del Pedregal de San Ángel (REPSA), México, Distrito Federal / Chromosome numbers in Asteraceae of the Ecological Reserve of the Pedregal de San Ángel (REPSA), Mexico City, Mexico  

Scientific Electronic Library Online (English)

Full Text Available SciELO Mexico | Language: Spanish Abstract in spanish Se registraron los números cromosómicos mitóticos o meióticos de 31 especies de Asteraceae en la Reserva Ecológica del Pedregal de San Ángel (REPSA), y por primera vez, los conteos cromosómicos de 3 especies endémicas de México: Acourtia cordata (2n= 54), Ageratina cylindrica (2n= 34) y Viguiera bud [...] dleiiformis (n= 17). Se discuten los resultados obtenidos de acuerdo con los datos disponibles para cada especie analizada. Abstract in english Mitotic or meiotic chromosome numbers are recorded for 31 species of Asteraceae growing in the Ecological Reserve of the Pedregal de San Angel (REPSA), Mexico City. The chromosome counts of 3 species endemic to Mexico are recorded for the first time: Acourtia cordata (2n= 54), Ageratina cilyndrica ( [...] 2n= 34), and Viguiera buddleiiformis (n= 17). The results are discussed in relation to the available data for each of the analyzed taxa.

Fabiola, Soto-Trejo; Guadalupe, Palomino; José Luis, Villaseñor.

2011-06-01

390

Malaria control in the municipality of San Esteban, Honduras Control de la malaria en el municipio de San Esteban, Honduras  

Directory of Open Access Journals (Sweden)

Full Text Available OBJECTIVES: To assess the burden of malaria in San Esteban, Department of Olancho, Honduras, and provide recommendations for control. METHODS: Malaria causes appreciable morbidity in San Esteban. In 2006, health workers reported an increase in malaria cases and requested recommendations for control. In 2005, 385 cases (Plasmodium vivax, 316; P. falciparum, 69 were detected from 4 007 blood smears in the San Esteban laboratory (slide positivity rate = 9.6%. During May-July 2006, we assessed the burden of malaria and made recommendations. We reviewed epidemiologic data from slide-confirmed malaria cases in 2005 and 2006 and conducted a knowledge, attitudes, and practices survey in households to assess malaria diagnostic, treatment, and prevention practices. RESULTS: During May-July 2006, 143 laboratory-confirmed malaria cases were detected (P. vivax, 134; P. falciparum, 9 in San Esteban, compared with 104 (P. vivax, 79; P. falciparum, 25 in May-July 2005. From January 2005 to July 2006, 538 cases were detected in San Esteban, with increased frequency in May-October and the highest incidence in children 0-14 years old. We administered 112 surveys in 19 communities. Seventy percent of respondents reported a history of malaria in a household member, with the highest frequency reported in mothers (45% and children under 14 years old (37%. Most households did not have mosquito protection such as bed nets, screens, or indoor residual insecticide. CONCLUSIONS: Malaria is ongoing in San Esteban, with increased incidence in children. We recommend increased availability and promotion of insecticide-treated bed nets, improved timing and coverage of indoor residual spraying, and improved community malaria practices through education sessions.OBJETIVOS: Evaluar la carga de malaria en San Esteban, departamento de Olancho, Honduras, y ofrecer recomendaciones para su control. MÉTODOS: La malaria es causa de una considerable morbilidad en San Esteban. En 2006, los trabajadores sanitarios informaron un aumento de casos de malaria y solicitaron recomendaciones para su control. En 2005, en el laboratorio de San Esteban se detectaron 385 casos (316 por Plasmodium vivax y 69 por P. falciparum en 4 007 frotis sanguíneos (tasa de positividad: 9,6%. Entre mayo y julio de 2006 se evaluó la carga de malaria y se hicieron las recomendaciones. Se revisaron los datos epidemiológicos de los casos confirmados de 2005 y 2006 y se aplicó una encuesta sobre conocimientos, actitudes y hábitos en los hogares para evaluar las prácticas relacionadas con el diagnóstico, el tratamiento y la prevención de la malaria. RESULTADOS: Entre mayo y julio de 2006 en San Esteban se detectaron 143 casos de malaria confirmados por el laboratorio (134 por P. vivax y 9 por P. falciparum, en comparación con 104 (79 por P. vivax y 25 por P. falciparum entre mayo y julio de 2005. Entre enero de 2005 y julio de 2006 se detectaron 538 casos en San Esteban, con un aumento en la frecuencia entre mayo y octubre y la mayor incidencia en niños de 0 a 14 años. Se aplicaron 112 encuestas en 19 comunidades. De los que respondieron, 70% había tenido algún miembro del hogar con malaria, con una mayor frecuencia en las madres (45% y los menores de 14 años (37%. La mayoría de los hogares carecían de protección contra los mosquitos, como mosquiteros para las camas y ventanas o fumigación de interiores. CONCLUSIONES: La malaria se mantiene en aumento en San Esteban, con una mayor incidencia en los niños. Se recomienda incrementar la disponibilidad y la promoción de mosquiteros tratados con insecticidas, mejorar la periodicidad y la cobertura de la fumigación de interiores y mejorar los hábitos de la comunidad mediante sesiones educativas.

Christine Elizabeth Bell

2009-03-01

391

Fragmented Landscapes in the San Gorgonio Pass Region: Insights into Quaternary Strain History of the Southern San Andreas Fault System  

Science.gov (United States)

The San Gorgonio Pass (SGP) region is a zone of structural complexity within the southern San Andreas Fault system that is characterized by (1) multiple strands of the San Andreas Fault (SAF), (2) intense and diverse microseismicity, (3) contraction within the SGP fault zone (SGPfz), and (4) complex and diverse landforms - all a consequence of structural complications in the vicinity of the southeastern San Bernardino Mountains (SBM). Multiple strands of the SAF zone in the SGP region partition the landscape into discrete geomorphic/geologic domains, including: San Gorgonio Mountain (SGM), Yucaipa Ridge (YR), Kitching Peak (KP), Pisgah Peak (PP), and Coachella Valley (CV) domains. The morphology of each domain reflects the tectonic history unique to that region. Development of the SGP knot in the Mission Creek strand of the SAF (SAFmi) led to westward deflection of the SAFmi, juxtaposition of the KP, PP, and SGM domains, initiation of uplift of YR domain along thrust faults in headwaters of San Gorgonio River, and development of the San Jacinto Fault. Slip on the SAF diminished as a result, thereby allowing integrated drainage systems to develop in the greater SGP region. San Gorgonio River, Whitewater River, and Mission Creek are discrete drainages that transport sediment across the SGM, YR, PP, KP, and CV domains into alluvial systems peripheral to the SGP region. There, depositional units (San Timoteo Formation, upper member, deformed gravels of Whitewater River) all contain clasts of SBM-type and San Gabriel Mountain-type basement, thus constraining slip on the SAF in the SGP region. Middle and late Pleistocene slip on the Mill Creek strand of the SAF (SAFm) in the SGP region has attempted to bypass the SGP knot, and has disrupted landscapes established during SAFmi quiescence. Restoration of right-slip on the SAFm is key to deciphering landscape history. Matti and others (1985, 1992) proposed that a bi-lobed alluvial deposit in the Raywood Flats area has been displaced by 8-10 km from entrenched bedrock drainages north of the SAFm (North Fork Whitewater River and Hell-For-Sure Canyon). This restoration, along with restoration of 3-4 km of dextral-slip along SAFmi, leads to an integrated drainage network that extended from San Gorgonio Peak southward across the SAFm and SAFmi, through the San Timoteo drainage basin and ultimately to the Santa Ana River drainage. Following final slip on the SAFmi, which occurred between approximately 1.2 and 0.5 Ma, the 8-10 km dextral-slip reconstruction on the SAFm can be used to restore the ancestral Mission Creek drainage system, which has always flowed southeast. A large alluvial-fan complex that overlies the SAFmi strand developed where the ancestral Mission Creek River debouched into the Coachella Valley. Analysis of cosmogenic radionuclides (21Ne from quartz) from surface boulders indicates that oldest deposits in the fan complex are about 400ka old, compatible with pedogenic development on the oldest surface. Approximately 2-4 km dextral slip on the youngest strands of the SAF (Banning and Garnet Hill) represents the latest bypass of the SGP structural knot. Cumulative displacement on all strands of the SAF in the greater SGP region appears to have been no more than ~18 km since inception of the left step in the SAFmi. Regional evidence suggests that this event initiated at ~1.2Ma, leading to a Quaternary slip rate on the SAF at SGP of no more than 10-15 mm/yr.

Kendrick, K. J.; Matti, J. C.; Landis, G. P.; Alvarez, R. M.

2006-12-01

392

Structure modelling of SANS data based on concentrated hard-sphere particles system  

Energy Technology Data Exchange (ETDEWEB)

The application of hard-sphere model in interpreting SANS data has found useful in many material studies. The model has been adopted for analysis of SANS data collected from MINT facility. This paper describes the implication of the model in the study of materials using SANS as a probe. (author)

Abdul Aziz Bin Mohamed; Shukri Bin Mohd; Azali Bin Muhammad [Malaysian Institute for Nuclear Technology Research, Complex of PUSPATI, Kajang (Malaysia)

1999-10-01

393

76 FR 6517 - San Luis & Rio Grande Railroad-Petition for a Declaratory Order  

Science.gov (United States)

...Docket No. FD 35380] San Luis & Rio Grande Railroad--Petition for a Declaratory...to a petition filed by San Luis & Rio Grande Railroad (SLRG), the Board instituted...Antonito, Colorado. See San Luis & Rio Grande R.R.--Petition for a...

2011-02-04

394

78 FR 70005 - Naval Base Ventura County, San Nicolas Island, California; Restricted Area  

Science.gov (United States)

...in the waters of the Pacific Ocean surrounding San Nicolas Island...and be free of any defects or viruses. Docket: For access to the...follows: Sec. 334.980 Pacific Ocean, around San Nicholas Island...The waters of the Pacific Ocean around San Nicholas...

2013-11-22

395

33 CFR 334.980 - Pacific Ocean; around San Nicolas Island, Calif., naval restricted area.  

Science.gov (United States)

...2010-07-01 false Pacific Ocean; around San Nicolas Island, Calif., naval restricted area...334.980 Pacific Ocean; around San Nicolas Island, Calif., naval restricted area...waters of the Pacific Ocean around San Nicolas Island, Calif., extending about...

2010-07-01

396

33 CFR 165.1152 - San Pedro Bay, California-Regulated navigation area.  

Science.gov (United States)

...2010-07-01 2010-07-01 false San Pedro Bay, California-Regulated navigation...Coast Guard District § 165.1152 San Pedro Bay, California—Regulated navigation...safety. (c) Location. (1) The San Pedro Bay Regulated Navigation Area (RNA)...

2010-07-01

397

77 FR 1025 - Security Zones; Cruise Ships, San Pedro Bay, CA  

Science.gov (United States)

...1625-AA87 Security Zones; Cruise Ships, San Pedro Bay, CA AGENCY: Coast Guard, DHS. ACTION...regulation for cruise ships visiting San Pedro Bay, California by providing a common...cruise ship that is located within the San Pedro Bay port area landward of the sea...

2012-01-09

398

76 FR 50710 - Security Zones; Cruise Ships, San Pedro Bay, CA  

Science.gov (United States)

...1625-AA87 Security Zones; Cruise Ships, San Pedro Bay, CA AGENCY: Coast Guard, DHS. ACTION...1154, Security Zones; Cruise Ships, San Pedro Bay, California, by providing a common...cruise ship that is located within the San Pedro Bay port area landward of the sea...

2011-08-16

399

On the Life and Deeds of San Precario, Patron Saint of Precarious Workers and Lives  

Directory of Open Access Journals (Sweden)

Full Text Available Noi siamo la generazione post-socialista, la generazione del dopo guerra fredda, della fine delle burocrazie verticali e del controllo sull'informazione. Siamo un movimento globale e neuropeo, che porta avanti la rivoluzione democratica scaturita dal Sessantotto mondiale e lotta contro la distopia neoliberista oggi al culmine. Siamo ecoattivisti e mediattivisti, siamo i libertari della Rete e i metroradicali dello spazio urbano, siamo le mutazioni transgender del femminismo globale, siamo gli hacker del terribile reale. Siamo gli agitatori del precariato e gli insorti del cognitariato. Siamo anarcosindacalisti e postsocialisti. Siamo tutti migranti alla ricerca di una vita migliore. E non ci iconosciamo in voi, stratificazioni tetre e tetragone di ceti politici sconfitti già nel XX secolo. Non ci riconosciamo nella sinistra italyana.Manifesto Bio/Pop del Precariato Metroradicale, 20042004 has marked the beginning of the spreading "cult" of San Precario, Patron Saint of precarious, casual, sessional, temporary, flexible and fractional workers. The Saint appears in public spaces in occasion of rallies, marches, interventions and demonstrations, and its popularity has lead to development of a precise and colorful iconography, hagiography and rituals. This popularity conversely is also the sign of the gravity of the issue of precarity in Italy and Europe .San Precario epitomises current Italian activist practices. These practices, although specifically Italian, intersect with similar realities in Europe and are based on mythopoetic narratives and actions and mediatic embodiments. This paper analysis a variety of texts produced around San Precario, from posters, saint cards, product cards, videos, "official" narratives, personal accounts, relating them to the political debate surrounding precarity.

Marcello Tarì

2005-01-01

400

Treatment of mine water and solid residues (RS) in San Rafael mining and milling complex  

International Nuclear Information System (INIS)

San Rafael Mining and Milling Complex is located in Mendoza Province, in San Rafael Department, 38 km West from San Rafael city and 240 km south from Mendoza city, capital of the province. Activities related with yellow cake production were performed from 1979 to 1999. Nowadays the mine and the plant are in stand by. At the moment technical, economic and environmental studies are being done in order to restart the activities. Different kind of residues are accumulated in the site: a) Tailing; b) Sludges; c) Low grade ores; e) Waste rock; f) Mine water; g) Solid residues (RS). In this paper methodology to treat mine water and solid residues (RS) will be informed. a) Mine water: 800.000 m3 of mine water are accumulated in different open pit. Uranium, radium and arsenic are the main ions to take into account to treat the water. Several laboratory and pilot test have been performed in order to define the treatment of the water, according with the regulatory requirement. A methodology using anion exchange resin to fix uranium and precipitation using barium chloride and iron sulfate to separate radium and arsenic has been developed. b) Solid residues (RS): these residues (precipitates) have been produced by neutralization of effluents in a nuclear purification process (TBP process). They are accumulated in drums. These residues come from Cordoba plant, a factory which produces UO2 powder. The total content of uranium in the precipitate is 14.249 kg with an average uranium concentration of 1,33%. A methodology using sulfuric acid dissolution of the precipitates and anion exchange resin to recovery the uranium has been developed. (author)

401

Lenguaje, belleza y verdad en Cicerón y San Agustín: las encrucijadas de la persuasión  

Scientific Electronic Library Online (English)

Full Text Available SciELO Chile | Language: Spanish Abstract in spanish En este artículo me propongo mostrar las profundas diferencias entre Cicerón y San Agustín, desde el punto de vista de sus respectivas visiones del arte retórico. Mientras que, para el primero, la oratoria se ampara en el horizonte de las meras probabilidades, teniendo como fin la persuasión del aud [...] itorio, para el Obispo de Hipona, en cambio, el referente último está marcado por el hallazgo de la verdad, a partir de las Sagradas Escrituras. En efecto, Cicerón construye una teoría retórica compatible con la argumentación que debe dominar un buen abogado, sin las limitaciones de la obligación a la verdad y la prohibición del encubrimiento punible, mientras que San Agustín, en el De doctrina christiana, busca el establecimiento de una retórica consecuente con las aspiraciones de un auténtico orador eclesiástico. Debido a la diferencia de objetivos propuestos por cada uno de estos filósofos, mientras Cicerón se aproxima cada vez más a una posición relativista, San Agustín, aceptando la relatividad, busca, sin embargo, una práctica oratoria compatible con la expresión más pura y fidedigna de la verdad Abstract in english In this article, I attempt to show the profound differences between Cicero and Saint Augustine concerning the rhetorical art. According to Cicero the oratory makes sense in the context of mere probabilities and aims at convincing the audience. Saint Augustine, on the contrary, thinks the scope of th [...] e oratory is given by finding truth in the Holy Scriptures. Indeed, Cicero states his theory as compatible with the arguments which a good lawyer should have, no matter they do not follow truth or hide what is against law. In De doctrina christiana, Saint Augustine prefers to state a rhetoric coherent to the aspirations of the authentic ecclesiastical orator. So, it is due to their different theories that Cicero approaches to a relativism, but Saint Augustine, though he accepts relativity, seeks an oratory practice compatible to the purest expression of truth

Andrés, Covarrubias C..

402

Lenguaje, belleza y verdad en Cicerón y San Agustín: las encrucijadas de la persuasión  

Directory of Open Access Journals (Sweden)

Full Text Available En este artículo me propongo mostrar las profundas diferencias entre Cicerón y San Agustín, desde el punto de vista de sus respectivas visiones del arte retórico. Mientras que, para el primero, la oratoria se ampara en el horizonte de las meras probabilidades, teniendo como fin la persuasión del auditorio, para el Obispo de Hipona, en cambio, el referente último está marcado por el hallazgo de la verdad, a partir de las Sagradas Escrituras. En efecto, Cicerón construye una teoría retórica compatible con la argumentación que debe dominar un buen abogado, sin las limitaciones de la obligación a la verdad y la prohibición del encubrimiento punible, mientras que San Agustín, en el De doctrina christiana, busca el establecimiento de una retórica consecuente con las aspiraciones de un auténtico orador eclesiástico. Debido a la diferencia de objetivos propuestos por cada uno de estos filósofos, mientras Cicerón se aproxima cada vez más a una posición relativista, San Agustín, aceptando la relatividad, busca, sin embargo, una práctica oratoria compatible con la expresión más pura y fidedigna de la verdadIn this article, I attempt to show the profound differences between Cicero and Saint Augustine concerning the rhetorical art. According to Cicero the oratory makes sense in the context of mere probabilities and aims at convincing the audience. Saint Augustine, on the contrary, thinks the scope of the oratory is given by finding truth in the Holy Scriptures. Indeed, Cicero states his theory as compatible with the arguments which a good lawyer should have, no matter they do not follow truth or hide what is against law. In De doctrina christiana, Saint Augustine prefers to state a rhetoric coherent to the aspirations of the authentic ecclesiastical orator. So, it is due to their different theories that Cicero approaches to a relativism, but Saint Augustine, though he accepts relativity, seeks an oratory practice compatible to the purest expression of truth

Andrés Covarrubias C.

2002-01-01

403

Sociedades agrícolas en resistencia. Los pueblos de San Miguel, Santa Cruz y San Pedro, 1878-1883  

Directory of Open Access Journals (Sweden)

Full Text Available Agricultural societies in the state of Mexico involved a form of legal resistance used by indigenous communities in the face of liberal individualization policies of communal property, particularly the federal seizure law of June 25, 1956. In this context, some residents of the towns of Santa Cruz and San Miguel created an agricultural association, as did residents from the town of San Pedro, to retain the collective use of their communal goods and acquire some legal capacity. This condition thus allowed indigenous peoples to present writs of amparo to defend "private" rights.

Porfirio Neri Guarneros

2013-09-01

404

Thermal Performance of Traditional and New Concept Houses in the Ancient Village of San Pedro De Atacama and Surroundings  

Directory of Open Access Journals (Sweden)

Full Text Available Earth, wood and others traditional materials are still used in house constructions in many regions of the world, especially in the Andes. San Pedro de Atacama, for example, is a small town where earth blocks (adobes and rammed earth (tapial are important ways to construct, an art passed on through generations. Energy properties of earth are very interesting: thermal conductivity is low; heat storage capacity is high; color is variable and can be used to absorb or to reject solar radiation. However, nowadays the government social dwelling service is proposing a different type of construction, which does not ma