WorldWideScience
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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

2

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

3

Molecular biology, epidemiology, and the demise of the linear no-threshold (LNT) hypothesis; Biologie moleculaire, epidemiologie et la fin de la relation lineaire sans seuil  

Energy Technology Data Exchange (ETDEWEB)

The prime concern of radiation protection policy since 1959 has been protecting DNA from damage. The 1995 NCRP Report 121 on collective dose stases that since no human data provides direct support for the linear no threshold hypothesis (LNT), and some studies provide quantitative data that, with statistical significance, contradict LNT, ultimately, confidence in LNT is based on the biophysical concept that the passage of a single charged particle could cause damage to DNA that would result in cancer. Current understanding of the basic molecular biologic mechanisms involved and recent data are examined before presenting several statistically significant epidemiologic studies that contradict the LNT hypothesis. Over eons of time a complex bio-system evolved to control the DNA alterations (oxidative adducts) produced by about 10{sup 10} free radicals/cell/d derived from 2-3 % of all metabolized oxygen. Antioxidant prevention, enzymatic repair of DNA damage, and removal of persistent DNA alterations by apoptosis, differentiation, necrosis, and the immune system, sequentially reduce DNA damage from about 10{sup 6} DNA alterations/cell/d to about 1 mutation/cell/d. These mutations accumulate in stem cells during a lifetime with progressive DNA damage-control impairment associated with aging and malignant growth. A comparatively negligible number of mutations, an average of about 10{sup -7} mutations/cell/d, is produced by low LET radiation background of 0.1 cGy/y. The remarkable efficiency of this bio-system is increased by the adaptive responses to low-dose ionizing radiation. Each of the sequential functions that prevent, repair, and remove DNA damage are adaptively stimulated by long-dose ionizing radiation in contrast to their impairment by high-dose radiation. The biologic effect of radiation is not determined by the number of mutations it creates, but by its effect on the bio-system that controls the relentless enormous burden of oxidative DNA damage. At low doses, radiation stimulates this bio-system with consequent significant decrease of metabolic mutations. Low-dose stimulation of the immune system may not only prevent cancer by increasing removal of pre-malignantor malignant cells with persistent DNA damage, but used in human radioimmunotherapy may also completely remove malignant tumors with metastases. The reduction of gene mutations in response to low-dose radiation provides a biological explanation of the statistically significant observations of mortality and cancer mortality risk decrements, and contradicts the biophysical concept of the basic mechanisms upon which, ultimately, the NCRPs confidence in the LNT hypothesis is based. (author)

Pollycove, M. [California Univ., San Francisco, CA (United States). US Nuclear Regulatory Commission; Feinendegen, L.E. [Clinical Center, National Institutes of Health, Bethesda (United States). Dept. of Nuclear Medicine

1999-03-01

4

The San Andreas fault experiment. [gross tectonic plates relative velocity  

Science.gov (United States)

A plan was developed during 1971 to determine gross tectonic plate motions along the San Andreas Fault System in California. Knowledge of the gross motion along the total fault system is an essential component in the construction of realistic deformation models of fault regions. Such mathematical models will be used in the future for studies which will eventually lead to prediction of major earthquakes. The main purpose of the experiment described is the determination of the relative velocity of the North American and the Pacific Plates. This motion being so extremely small, cannot be measured directly but can be deduced from distance measurements between points on opposite sites of the plate boundary taken over a number of years.

Smith, D. E.; Vonbun, F. O.

1973-01-01

5

Fine-scale delineation of the location of and relative ground shaking within the San Andreas Fault zone at San Andreas Lake, San Mateo County, California  

Science.gov (United States)

The San Francisco Public Utilities Commission is seismically retrofitting the water delivery system at San Andreas Lake, San Mateo County, California, where the reservoir intake system crosses the San Andreas Fault (SAF). The near-surface fault location and geometry are important considerations in the retrofit effort. Because the SAF trends through highly distorted Franciscan mélange and beneath much of the reservoir, the exact trace of the 1906 surface rupture is difficult to determine from surface mapping at San Andreas Lake. Based on surface mapping, it also is unclear if there are additional fault splays that extend northeast or southwest of the main surface rupture. To better understand the fault structure at San Andreas Lake, the U.S. Geological Survey acquired a series of seismic imaging profiles across the SAF at San Andreas Lake in 2008, 2009, and 2011, when the lake level was near historical lows and the surface traces of the SAF were exposed for the first time in decades. We used multiple seismic methods to locate the main 1906 rupture zone and fault splays within about 100 meters northeast of the main rupture zone. Our seismic observations are internally consistent, and our seismic indicators of faulting generally correlate with fault locations inferred from surface mapping. We also tested the accuracy of our seismic methods by comparing our seismically located faults with surface ruptures mapped by Schussler (1906) immediately after the April 18, 1906 San Francisco earthquake of approximate magnitude 7.9; our seismically determined fault locations were highly accurate. Near the reservoir intake facility at San Andreas Lake, our seismic data indicate the main 1906 surface rupture zone consists of at least three near-surface fault traces. Movement on multiple fault traces can have appreciable engineering significance because, unlike movement on a single strike-slip fault trace, differential movement on multiple fault traces may exert compressive and extensional stresses on built structures within the fault zone. Such differential movement and resulting distortion of built structures appear to have occurred between fault traces at the gatewell near the southern end of San Andreas Lake during the 1906 San Francisco earthquake (Schussler, 1906). In addition to the three fault traces within the main 1906 surface rupture zone, our data indicate at least one additional fault trace (or zone) about 80 meters northeast of the main 1906 surface rupture zone. Because ground shaking also can damage structures, we used fault-zone guided waves to investigate ground shaking within the fault zones relative to ground shaking outside the fault zones. Peak ground velocity (PGV) measurements from our guided-wave study indicate that ground shaking is greater at each of the surface fault traces, varying with the frequency of the seismic data and the wave type (P versus S). S-wave PGV increases by as much as 5–6 times at the fault traces relative to areas outside the fault zone, and P-wave PGV increases by as much as 3–10 times. Assuming shaking increases linearly with increasing earthquake magnitude, these data suggest strong shaking may pose a significant hazard to built structures that extend across the fault traces. Similarly complex fault structures likely underlie other strike-slip faults (such as the Hayward, Calaveras, and Silver Creek Faults) that intersect structures of the water delivery system, and these fault structures similarly should be investigated.

Catchings, R.D.; Rymer, M.J.; Goldman, M.R.; Prentice, C.S.; Sickler, R.R.

2013-01-01

6

AIDS-related disseminated histoplasmosis in San Francisco, California.  

OpenAIRE

The published reports of patients with the acquired immunodeficiency syndrome (AIDS) with disseminated histoplasmosis come mostly from institutions located in endemic areas for histoplasmosis, where disease is thought to occur by either primary infection or reactivation. The characteristics of reactivation disease are not well delineated. We describe the clinical features of reactivation disseminated histoplasmosis in 46 residents of San Francisco, California, with AIDS who did not report rec...

Fredricks, D. N.; Rojanasthien, N.; Jacobson, M. A.

1997-01-01

7

The accommodation of relative motion at depth on the San Andreas fault system in California  

Science.gov (United States)

Plate motion below the seismogenic layer along the San Andreas fault system in California is assumed to form by aseismic slip along a deeper extension of the fault or may result from lateral distribution of deformation below the seismogenic layer. The shallow depth of California earthquakes, the depth of the coseismic slip during the 1906 San Francisco earthquake, and the presence of widely separated parallel faults indicate that relative motion is distributed below the seismogenic zone, occurring by inelastic flow rather than by aseismic slip on discrete fault planes.

Prescott, W. H.; Nur, A.

1981-01-01

8

CONSTANCY OF THE RELATION BETWEEN FLOC SIZE AND DENSITY IN SAN FRANCISCO BAY  

Science.gov (United States)

Ganju, N.K., D.H. Schoellhamer, M.C. Murrell, J.W. Gartner and S.A. Wright. In press. Constancy of the Relation Between Floc Size and Density in San Francisco Bay. In: INTERCOH 2003: Proceedings of the 7th International Conference on Nearshore and Estuarine Cohesive Sediment Tran...

9

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 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

10

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

11

Are scale-invariant stress orientations related to seismicity rates near the San Andreas fault?  

Science.gov (United States)

Based on an analysis of the direction of maximum horizontal compressive stress as a function of depth as observed at different scientific wells along the San Andreas fault, it has recently been suggested that the scale-invariant fluctuations in the stress orientation over intervals from tens of centimeters to several kilometers are directly related to the local earthquake magnitude-frequency statistics. Here we mathematically analyze the possibility of such a relationship and show that the magnitude-frequency statistics alone is insufficient to explain the scaling of the stress orientation fluctuations. While stress perturbations caused by slip on adjacent faults of various sizes can still be responsible for these fluctuations, the average amplitude of the induced changes in the orientation would have to increase nonlinearly with the fault size. As the example of two research wells near the San Andreas fault also shows, the specific nonlinear form would have to depend sensitively on the specific geographic location. We conclude that the observed scale-invariant fluctuations in the stress orientation are more likely a consequence of a combination of local seismicity rates and the specific local fault structure.

Davidsen, Jörn; Schumann, Aicko Y.; Naylor, Mark

2013-12-01

12

Quantitative analysis and relevant features of the scientific literature related to SAXS and SANS  

International Nuclear Information System (INIS)

We present and discuss here numerical information derived from a systematic searching of scientific papers related to SAXS and SANS published in indexed journals - from 1945 until nowadays - recorded by the Web of Science Data Bank (WoS). We have detected interesting features regarding the time dependence of the number of papers/year, N(t), indicating the existence of three well-defined periods of historical evolution with rather well-defined boundaries. All three periods exhibit a positive and approximately linear variation of N(t) but, at the two transitions between periods, the rate of growth exhibits clear and strong increases. Differences of the historical evolutions in the numbers of papers/year related to SAXS and to SANS were established. The different behaviours regarding the numbers of papers/year related to SAXS and to SANS and the existence of three different and well defined periods for N(t) can be qualitatively understood as a consequence of the progressive and increasing availability along the last three decades of very brilliant synchrotrons, last generation commercial X-ray sources, new neutron facilities, powerful computers and novel theoretical approaches for SAS data analysis. The rates of growth in the number of papers/year published by authors from a set of different countries are approximately constant along the last two decades. For other countries we have detected a slowing down effect in the number of papers/year while a clear acceleration co papers/year while a clear acceleration could be noticed for the production of SAS papers by authors from several emerging countries. These opposite trends compensate in such a way that the number of SAS (SAXS+SAXS) articles published per year all around the world maintained a vigorous linear growth - during more than 20 years - at a constant rate of 60 papers/year, without any indication of eventual saturation. The observed distribution of articles among different journals indicates that a very high fraction of the volume of SAS research is focused to the structure of soft matter.

13

Lithofacies characterization related to the Raigon Formation located in the southern area of the San Jose Department  

International Nuclear Information System (INIS)

In this work the different lithofacies characterization related to the Raigon Formation, located in the southern area of the San Jose Department, is exposed supported by surface and subsurface data. Six stratigraphical sections were constructed considering lithological borehole descriptions to the aim of making a contribution on the spatial distribution, thickness, disposition, lithofaciological variations of this Formation and its stratigraphical relationships with other units

14

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

15

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.

16

[Violence-related deaths in Argentina: two case studies in the cities of Venado Tuerto and San Rafael].  

Science.gov (United States)

This article presents the results of a comparative study of two Argentinian cities, namely Venado Tuerto and San Rafael, which revealed different trends in the rates of firearm-related homicides. The methodology combined two strategies of analysis: semi-structured interviews with key informants (municipal and provincial government agents in different areas of management, as well as members of non-governmental organizations) and focus groups with actors involved in medical care, education, and religious institutions. The results suggest little difference between cities in which rates have increased and those in which rates have decreased. The most significant difference was that in Venado Tuerto a greater fragility of public institutions was observed due to the lack of articulation between such institutions. In San Rafael, the actors interviewed attribute the low level of conflict to a violence prevention network in which provincial and municipal agencies interact. Although neither city is violent at the most critical Latin American levels, the different results shown in Venado Tuerco and San Rafael indicate the possibility of bringing institutions together in a joint framework of conversations, agreements and policies. PMID:23175402

Spinelli, Hugo; Alazraqui, Marcio; Galeano, Diego; Calandrón, Sabrina

2012-12-01

17

Issues related to modeling the transport of suspended sediments in Northern San Francisco Bay, California  

Science.gov (United States)

Measurements of suspended sediment concentrations at several deep-channel stations in San Francisco Bay are reviewed. Sediment concentrations are found to be strongly correlated with delta outflow, tidal, and spring/neap variations. However, little to no correlation is observed between wind speed and sediment concentration in the deep channel. A two-dimensional depth-averaged sediment transport model has been developed which includes the effects of tidal and spring-neap variations and wind-generated resuspension. During a period of low delta outflow, the model successfully reproduces field measurements of suspended sediment concentration at a station in San Pablo Bay. The model is found to be most sensitive to critical shear stresses, settling velocity, and the erosion rate constant.

McDonald, Ellen Thomas; Cheng, Ralph T.

1994-01-01

18

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

OpenAIRE

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 final...

Silvia Ventura Luna

2010-01-01

19

Los municipios de San Gabriel Chilac y San Juan Teotihuacan ante la federalización de las aguas, 1888-1960 / Les municipalités de San Gabriel Chilac et San Juan Teotihuacan face à la fédéralisation des eaux, 1888-1960 / The Municipalities of San Gabriel Chilac and San Juan Teotihuacan in Relation to the Federalization of Water, 1888-1960  

Scientific Electronic Library Online (English)

Full Text Available SciELO Mexico | Language: Spanish Abstract in spanish A partir de un análisis comparativo sobre dos casos de pequeña irrigación en los municipios de San Gabriel Chilac en Puebla y San Juan Teotihuacan en el Estado de México, se muestra la diversidad de resultados que generó la política de centralización sobre el recurso hídrico que antes controlaba el [...] ayuntamiento. De igual modo, se explican los factores socioeconómicos regionales que llevaron al gobierno local y a los actores sociales a negociar, adaptarse o resistir a tales políticas federales que disminuían sus prerrogativas, para finalmente señalar quienes fueron los beneficiarios directos del proceso. Abstract in english Based on a comparative analysis of two cases of small-scale irrigation in the municipalities of San Gabriel Chilac (Puebla) and San Juan Teotihuacan (State of Mexico), this article shows the diverse results generated by the policy designed to centralize dominion over the hydric resources previously [...] controlled by local governments (ayuntamientos). In addition, it explains the regional socioeconomic factors that led local governments and social actors to negotiate, adapt to, or resist, those federal policies that constrained their prerogatives. Finally, it identifies the individuals who directly benefitted from this process.

Jesús Edgar, Mendoza García.

2013-11-01

20

Structural investigation of nonionic fluorinated micelles by SANS in relation to mesoporous silica materials.  

Science.gov (United States)

In an attempt to answer the question if there is dependence between the pore ordering of the mesoporous silica, obtained through the cooperative template mechanism, and the shape of the micellar aggregates of the surfactant solutions, the micellar structures of two nonionic fluorinated surfactant based-systems are studied by SANS. By fitting the experimental spectra with theoretical models, the structural evolution of the molecular aggregates can be described, and some important parameters can be obtained, such as the water and eventually oil penetration into the surfactant film, the aggregation number, the area per polar head of the surfactant, and the surfactant chain conformations. We have shown that for the C(8)F(17)C(2)H(4)(OC(2)H(4))(9)OH system, the micelles are prolate spheroids. The increase of the surfactant concentration in water does not change the characteristics of the interfacial film, but the aggregation number raises and the particles become more elongated. By contrast, the experimental curves of C(7)F(15)C(2)H(4)(OC(2)H(4))(8)OH cannot be fitted considering a small particle model. However, progressive incorporation of fluorocarbon induces a change of size and shape of the globules, which become smaller and more and more spherical. Regarding the material mesopore ordering, it appears that the micelles that lead to hexagonal mesoporous silica materials are described with a model of quasi-spherical globules. On the contrary, when large micelles are found, only wormhole-like structures are obtained. PMID:22145934

Michaux, Florentin; Blin, Jean-Luc; Teixeira, José; Stébé, Marie José

2012-01-12

21

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

22

Muertes por violencias en Argentina: dos estudios de caso en los Municipios de Venado Tuerto y San Rafael / Violence-related deaths in Argentina: two case studies in the cities of Venado Tuerto and San Rafael  

Scientific Electronic Library Online (English)

Full Text Available SciELO Public Health | Language: Spanish Abstract in spanish Este artículo ofrece los resultados de un estudio comparado de dos municipios: Venado Tuerto y San Rafael de la República Argentina, que presentaron tendencias diferentes en relación a las tasas de homicidios por armas de fuego. La metodología combinó dos estrategias de análisis: por un lado, entrev [...] istas semi-estructuradas con informantes clave (funcionarios municipales y provinciales en distintas áreas de la gestión, y referentes de organizaciones no gubernamentales) y, por el otro, grupos focales con actores vinculados a la atención médica, la educación y las instituciones religiosas. Los resultados sugieren una distancia muy corta entre las ciudades en las cuales las tasas han aumentado y aquellas en las que han disminuido. La diferencia más significativa es que en Venado Tuerto se encontró una mayor fragilidad en las instituciones públicas, por la falta de articulación entre las mismas. En tanto en San Rafael, los actores entrevistados atribuyen el bajo nivel de conflictividad a una red de prevención de violencias en la cual se coordinan agencias provinciales y municipales. Sin tratarse, ni Venado Tuerto, ni San Rafael, de ciudades violentas en los niveles latinoamericanos más truculentos, ambas muestran resultados diferentes que apuntan directamente a la posibilidad de juntar a las instituciones en un entramado de conversaciones, acuerdos y políticas en conjunto. Abstract in english This article presents the results of a comparative study of two Argentinian cities, namely Venado Tuerto and San Rafael, which revealed different trends in the rates of firearm-related homicides. The methodology combined two strategies of analysis: semi-structured interviews with key informants (mun [...] icipal and provincial government agents in different areas of management, as well as members of non-governmental organizations) and focus groups with actors involved in medical care, education, and religious institutions. The results suggest little difference between cities in which rates have increased and those in which rates have decreased. The most significant difference was that in Venado Tuerto a greater fragility of public institutions was observed due to the lack of articulation between such institutions. In San Rafael, the actors interviewed attribute the low level of conflict to a violence prevention network in which provincial and municipal agencies interact. Although neither city is violent at the most critical Latin American levels, the different results shown in Venado Tuerco and San Rafael indicate the possibility of bringing institutions together in a joint framework of conversations, agreements and policies.

Hugo, Spinelli; Marcio, Alazraqui; Diego, Galeano; Sabrina, Calandrón.

2012-12-01

23

Muertes por violencias en Argentina: dos estudios de caso en los Municipios de Venado Tuerto y San Rafael Violence-related deaths in Argentina: two case studies in the cities of Venado Tuerto and San Rafael  

Directory of Open Access Journals (Sweden)

Full Text Available Este artículo ofrece los resultados de un estudio comparado de dos municipios: Venado Tuerto y San Rafael de la República Argentina, que presentaron tendencias diferentes en relación a las tasas de homicidios por armas de fuego. La metodología combinó dos estrategias de análisis: por un lado, entrevistas semi-estructuradas con informantes clave (funcionarios municipales y provinciales en distintas áreas de la gestión, y referentes de organizaciones no gubernamentales y, por el otro, grupos focales con actores vinculados a la atención médica, la educación y las instituciones religiosas. Los resultados sugieren una distancia muy corta entre las ciudades en las cuales las tasas han aumentado y aquellas en las que han disminuido. La diferencia más significativa es que en Venado Tuerto se encontró una mayor fragilidad en las instituciones públicas, por la falta de articulación entre las mismas. En tanto en San Rafael, los actores entrevistados atribuyen el bajo nivel de conflictividad a una red de prevención de violencias en la cual se coordinan agencias provinciales y municipales. Sin tratarse, ni Venado Tuerto, ni San Rafael, de ciudades violentas en los niveles latinoamericanos más truculentos, ambas muestran resultados diferentes que apuntan directamente a la posibilidad de juntar a las instituciones en un entramado de conversaciones, acuerdos y políticas en conjunto.This article presents the results of a comparative study of two Argentinian cities, namely Venado Tuerto and San Rafael, which revealed different trends in the rates of firearm-related homicides. The methodology combined two strategies of analysis: semi-structured interviews with key informants (municipal and provincial government agents in different areas of management, as well as members of non-governmental organizations and focus groups with actors involved in medical care, education, and religious institutions. The results suggest little difference between cities in which rates have increased and those in which rates have decreased. The most significant difference was that in Venado Tuerto a greater fragility of public institutions was observed due to the lack of articulation between such institutions. In San Rafael, the actors interviewed attribute the low level of conflict to a violence prevention network in which provincial and municipal agencies interact. Although neither city is violent at the most critical Latin American levels, the different results shown in Venado Tuerco and San Rafael indicate the possibility of bringing institutions together in a joint framework of conversations, agreements and policies.

Hugo Spinelli

2012-12-01

24

Muertes por violencias en Argentina: dos estudios de caso en los Municipios de Venado Tuerto y San Rafael / Violence-related deaths in Argentina: two case studies in the cities of Venado Tuerto and San Rafael  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Spanish Abstract in spanish Este artículo ofrece los resultados de un estudio comparado de dos municipios: Venado Tuerto y San Rafael de la República Argentina, que presentaron tendencias diferentes en relación a las tasas de homicidios por armas de fuego. La metodología combinó dos estrategias de análisis: por un lado, entrev [...] istas semi-estructuradas con informantes clave (funcionarios municipales y provinciales en distintas áreas de la gestión, y referentes de organizaciones no gubernamentales) y, por el otro, grupos focales con actores vinculados a la atención médica, la educación y las instituciones religiosas. Los resultados sugieren una distancia muy corta entre las ciudades en las cuales las tasas han aumentado y aquellas en las que han disminuido. La diferencia más significativa es que en Venado Tuerto se encontró una mayor fragilidad en las instituciones públicas, por la falta de articulación entre las mismas. En tanto en San Rafael, los actores entrevistados atribuyen el bajo nivel de conflictividad a una red de prevención de violencias en la cual se coordinan agencias provinciales y municipales. Sin tratarse, ni Venado Tuerto, ni San Rafael, de ciudades violentas en los niveles latinoamericanos más truculentos, ambas muestran resultados diferentes que apuntan directamente a la posibilidad de juntar a las instituciones en un entramado de conversaciones, acuerdos y políticas en conjunto. Abstract in english This article presents the results of a comparative study of two Argentinian cities, namely Venado Tuerto and San Rafael, which revealed different trends in the rates of firearm-related homicides. The methodology combined two strategies of analysis: semi-structured interviews with key informants (mun [...] icipal and provincial government agents in different areas of management, as well as members of non-governmental organizations) and focus groups with actors involved in medical care, education, and religious institutions. The results suggest little difference between cities in which rates have increased and those in which rates have decreased. The most significant difference was that in Venado Tuerto a greater fragility of public institutions was observed due to the lack of articulation between such institutions. In San Rafael, the actors interviewed attribute the low level of conflict to a violence prevention network in which provincial and municipal agencies interact. Although neither city is violent at the most critical Latin American levels, the different results shown in Venado Tuerco and San Rafael indicate the possibility of bringing institutions together in a joint framework of conversations, agreements and policies.

Hugo, Spinelli; Marcio, Alazraqui; Diego, Galeano; Sabrina, Calandrón.

2012-12-01

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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)

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Mortalidad por Accidente de Tránsito en la Región Vial Tunja-San Gil, Colombia, 2001 Road accident-related mortality in the Tunja-San Gil area, Colombia, 2001  

Directory of Open Access Journals (Sweden)

Full Text Available ObjetivoIdentificar las características de la mortalidad por accidente de tránsito en la región Tunja-San Gil. Metodología Se realizó un estudio descriptivo de la accidentalidad letal ocurrida durante el año 2001. Se consultaron fuentes primarias (informe de necropsia, acta de levantamiento de cadáver, certificado de defunción e informe de laboratorio de toxicología en el Instituto Nacional de Medicina Legal y Ciencias Forenses y en los hospitales de la región. ResultadosOcurrieron 45 muertes; edad promedio 34,7 años; 75,6 % hombres. La distribución según condición de transitoriedad fue: peatones (37,1 %, motociclistas (25,7 %, conductores (20 %, ciclistas (8,6 % y pasajeros (8,6 %. El fin de semana sucedieron 65,1 % de los accidentes. Los atropellamientos y choques fueron los accidentes más frecuentes. Los sitios con mayor proporción de accidentalidad letal fueron Tunja, la vía Vado Real-Oiba y San Gil. El trauma por accidente de tránsito fue severo, con un “Injury Severity Score” alto (promedio 42,8; 53 % de víctimas fallecieron in situ y 73 % durante las primeras dos horas. Según el Injury Severity Score sólo una de cada tres muertes era no prevenible; 17,8 % fueron prevenibles y 46,7 % potencialmente prevenibles. Conclusiones Se percibe la necesidad de diseñar e implementar un sistema regionalizado de atención de trauma por accidente de tránsito.ObjectivesTo identify the characteristics of mortality related to motor vehicle accidents in the Tunja-San Gil area (Colombia in the year 2001. MethodsA descriptive study was performed on the deaths from road accidents. Autopsy reports, body removal reports, death certificates and blood concentration reports, available at the National Institute for Forensic Sciences and at the local hospitals, were reviewed. Results Forty five fatalities were analyzed. The mean age of the victims was 34,7 years; males were more affected than females, with a 3:1 ratio. 37% were pedestrians, 26% motorcyclists, 20% drivers, 8,6% cyclists and 8,6% passengers. 65,1% of the road accidents occurred during weekends. The most common road accidents were either collisions or by running over. The places with the highest rates of death from motor vehicle related accidents were the urban areas of Tunja and San Gil and the Vado Real-Oiba road. The mean Injury Severity Score was 42,8. 53% of the deaths at the scene received no medical care; 73% of the victims died within two hours after the motor-vehicle accident. 17,8% of deaths were definitely preventable and 46,7% were possibly preventable, for a combined preventable death rate of 64,5 %.

Luis Enrique Mayorga Mogollón

27

Distribution of nitrate and related nitrogen species in the unsaturated zone, Redlands and vicinity, San Bernardino County, California  

Science.gov (United States)

Nitrogen in the unsaturated soil zone in the vicinity of Redlands in San Bernardino County, Calif., has been suspected as the source of nitrate in water from wells. Plans have been made to recharge the aquifer with imported surface water. If this occurs, the rising water table will intercept soluble nitrate in the unsaturated zone. This study was made to quantify and delineate the distribution of the nitrate in the unsaturated zone. Thirteen test holes were drilled in areas of various land uses, and samples of the unsaturated-zone materials were obtained with depth. In 10 of the test holes, the maximum nitrate-nitrogen (N03--N) concentrations occurred within 10 feet of land surface suggesting N03--N sources at the surface. Ranking the test holes according to near-surface N03--N concentrations showed that, of the top six, only two are in irrigated citrus areas. One is in an abandoned feedlot. Of the lowest six, four are in irrigated citrus areas and one is in the Santa Ana River channel. The control test hole ranked fourth suggesting that relatively high N03--N concentrations can occur in near-surface soils even in the absence of human habitation. Analysis according to one conceptual model suggests that raising the water-table altitude by aquifer recharge will intercept N03--N now in the unsaturated zone causing increases in N03--N concentrations in water from wells of up to 48 milligrams per liter. The largest increases will occur in the vicinity of irrigated citrus areas. (Woodard-USGS).

Klein, John M.; Bradford, Wesley L.

1979-01-01

28

La familia, las relaciones afectivas y la identidad étnica entre indígenas migrantes urbanos en San Luis Potosí / La famille, les relations affectives et l'identité ethnique parmi les indigènes migrants urbains à San Luis Potosí / Family, Affective Relations and Ethnic Identity among Indigenous Urban Migrants in San Luis Potosí  

Scientific Electronic Library Online (English)

Full Text Available SciELO Mexico | Language: Spanish Abstract in spanish El objetivo de este artículo es debatir en torno al papel que desempeña la familia y las relaciones afectivas en la construcción de la pertenencia étnica en el caso de indígenas que han migrado a la ciudad. Básicamente se abordan los dilemas de reproducción étnica de tének y nahuas fuera de sus luga [...] res de origen para explicar el peso que adquieren las dimensiones subjetivas en la conformación de la identidad étnica. Abstract in english The aim of this article is to contribute to the debate on the role that the family and affective relations play in constructing ethnic belonging in the case of indigenous people who migrate to the city of San Luis Potosí. It explores the dilemmas of the ethnic reproduction of Teneks and Nahuas outsi [...] de their places of origin to explain the weight that subjective dimensions acquire in the formation of ethnic identities.

Mónica Lizbeth, Chávez González.

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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 Document Server

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

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Relations de r\\'ecurrence lin\\'eaires, primitivit\\'e et loi de Benford  

OpenAIRE

We prove that many sequences of positive numbers $(a_n)$ defined by finite linear difference equations $a_{n+k}=c_{k-1}a_{n+k-1}+...+c_0a_n$ with suitable non negative reals coefficients $c_i$ satisfy Bendford's Law on the first digit in many bases $b>2$. Our techniques rely on Perron-Frobenius theory via the companion matrix of the characteristic polynomial of the defining equation.

Deligny, Hugues; Jolissaint, Paul

2010-01-01

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Combining small angle neutron scattering (SANS) and fluorescence correlation spectroscopy (FCS) measurements to relate diffusion in agarose gels to structure.  

Science.gov (United States)

Small angle neutron scattering (SANS) and fluorescence correlation spectroscopy (FCS) measurements were carried out on agarose hydrogels to link their microscopic structure to the diffusivity of solutes at different scales. SANS allowed for the determination of the distribution of void volumes within the gels. They were shown to be compatible with a random network of cylindrical fibers as described by the Ogston model. FCS measured solute diffusivity in spaces similar in size to the void volumes, and thus, the results reflected the gel heterogeneity. Solute diffusivity was predicted by modeling the gel as microscopic geometrical cells. Variations in the diffusivity of solutes of different sizes could be predicted from the structural parameters of the gel using theory, taking into account obstruction by cylindrical cells and solute hydrodynamics. Prediction of the FCS autocorrelation functions for solutes from a cell model demonstrated a lack of sensitivity of this technique for multicomponent analysis. PMID:17034188

Fatin-Rouge, Nicolas; Wilkinson, Kevin J; Buffle, Jacques

2006-10-19

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The Phyllite and Micaschist Group with associated intrusions in the Sierra de San Luis (Sierras Pampeanas/Argentina) — structural and metamorphic relations  

Science.gov (United States)

Structural analyses of the Phyllite and Micaschist Group with intercalated intrusions in the Sierra de San Luis (Sierras Pampeanas, western Argentina) reveal a multi-stage magmato-tectonic evolution during Early Paleozoic times. The Tamboreo Tonalite intruded the undeformed clastic sediments of both groups and led to the development of a contact aureole. The Paso del Rey Granite and associated pegmatite dikes are interpreted as pre-kinematic with respect to the first deformation of the micaschists. After a variable, pre- to syn-deformational metamorphism, ~ WNW-ESE compression with a regional greenschist facies metamorphism affected the Phyllite and Micaschist Group as well as the intrusions. The La Florida Granite and associated pegmatite dikes are interpreted to have intruded the micaschists after the first deformational event. The present contacts between the Phyllite and Micaschist Group either are metamorphic transitions or ductile reverse faults. The former suggest that both groups initially were part of one crustal profile. Steeply inclined reverse faults and fold structures do not record a single vergence. A preliminary interpretation suggests that deformations and regional metamorphism took place in the Upper Ordovician-Middle Devonian interval and can be related to the second stage of the Famatinian Cycle after initial emplacement of plutons. The low grade rocks of the Sierra de San Luis, and related micaschists, can be compared with different occurrences in the Sierras Pampeanas basement complex to the north and probably were part of one large "Puncoviscana Basin".

Von Gosen, W.

1998-01-01

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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

34

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

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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...

36

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 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

37

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

38

Relaciones tróficas de los peces del embalse San Miguel Arco, de Soyaniquilpan, Estado de México / Relations trofics of the fish of the San Miguel Arco dam, in Soyaniquilpan, State of Mexico  

Scientific Electronic Library Online (English)

Full Text Available Las relaciones de los organismos en la naturaleza se basan en dos ciclos, uno de materia y el otro de energía, dichos ciclos dan origen a las cadenas tróficas las cuales dan origen a los tres niveles tróficos; autótrofos, herbívoros y carnívoros. Para el caso de los peces de agua dulce, los organism [...] os jóvenes viven y se alimentan en la orilla y superficie del agua, para conocer lo que comen se analiza el tracto digestivo. Por lo cual el presente trabajo pretende determinar la trama trófica de los peces del embalse San Miguel Arco. Se capturaron los peces del embalse con un chinchorro de 30 metros de largo y 1/3 de pulgada, los organismos se fijaron con formalina al 10 %, los peces se identificaron al igual que el alimento que consumieron, con claves especializadas, a la abundancia de los grupos alimenticios se les aplicó el índice de Simpson. Se encontró que Chirostoma humboldtianum, es zooplanctófago especialista, Cyprinus carpió, y Carassius auratus son planctófagos generalistas y Poeciliopsis infans es planctófago especialista. La trama trófica se basa en zooplancton (Bosmina y Mastigodiaptomus) además de zoobentos (Corixidae). Abstract in english The relations of the organisms in the nature are based on two cycles, one of matter and the other of energy, these cycles give origin to the food chains which give origin to the three food levels; autotrophs, herbivorous and carnivores. For the case of freshwater fishes, the young organisms live and [...] they are fed in the border and surface of the water, to know what they eat analyzes alimentary canal. Thus the present work tries to determine the trofhic plot of the fish of the San Miguel dam Arc. The fish of the dam with a small boat of 30 meters in length captured themselves and 1/3 of inch, the organisms paid attention with formalin to 10 %, the fish were identified like the food that consumed, with specialized keys, to the abundance of the nutritional groups I am applied the index to them of Simpson. One was that Chirostoma humboldtianum, is zooplanctofago specialistic, Cyprinus carpio, and Carassius auratus is planctofagos generalist and Poeciliopsis infans is planctófago specialistic. The trofic plot is based on zooplancton (Bosmina and Mastigodiaptomus) in addition to zoobentos (Corixidae).

M. Á., Yubi Armendáriz; N. A., Navarrete Salgado; G., Elías Fernández; G., Vázquez Gómez; E. S., Urrieta Zapiain.

2008-06-01

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A geochemical approach to assessing the relative contributions of rivers, wetlands and island drains to dissolved organic matter in the Sacramento-San Joaquin River Delta  

Science.gov (United States)

The Sacramento-San Joaquin River Delta (Delta) is a hydrologically complex system which, in addition to being used for crop production, development, and recreation, provides drinking water to over 23 million Californians. Understanding how existing Delta habitats currently affect dissolved organic matter (DOM) dynamics seasonally will help us predict how future changes in land use might influence water quality. This study assessed whether different sources (rivers, wetlands, open water, island drains) contribute DOM to the Delta, examined the composition of the added DOM, and then assessed the relative importance of DOM derived from these sources to the quality of water arriving at Clifton Court for export into the California State Water Project. We used a geochemical fingerprinting approach to characterize the DOM originating from different Delta habitats that employed a number of analyses including absorbance, fluorescence, lignin content and composition, ?13C and ?15N isotopic composition, structural groupings determined by 13C-NMR, and specific disinfection byproduct (DBP) formation potential. These qualitative parameters adequately distinguished DOM derived from four distinct sources and, thus, enabled us to use a linear mixing model to estimate the contribution of these sources to DOM exiting the Delta. Comparison of water entering the Delta via the Sacramento and San Joaquin Rivers versus water exiting the Delta at Clifton Court indicated that the Delta was a source of DOM throughout the year, particularly in February, March, and May when concentrations already were high in incoming river water. Water passage through shallow wetlands and subsided islands significantly increased DOM concentrations, while deep open water habitats supporting submerged aquatic vegetation had little discernable effect on DOM concentrations and composition. Wetlands contributed greatest amounts of DOM in the spring and summer, in contrast to the island drains, which appeared to be important sources of DOM during the winter. Results indicate that significant changes in land use, particularly the introduction of shallow wetlands, could alter existing patterns of DOM concentrations in the Delta.

Kraus, T. E.; Bergamaschi, B. A.; Stepanauskas, R.; Hernes, P.; Kendall, C.; Spencer, R. G.; Losee, R. F.; Fujii, R.

2007-12-01

40

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  

Scientific Electronic Library Online (English)

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

41

Northern California near San Francisco  

Science.gov (United States)

A part of northern California centered near San Francisco Bay (38.0N, 122.0W) photographed at 3 p.m. January 1, 1974, from the Skylab space station in Earth orbit. This near vertical view encompasses the coastline from Monteray Bay (right) to about 50 miles north of Point Reyes (left) and includes, from bottom to top, San Francisco Bay (center), Sacramento Valley (left center), San Joaquin Valley (right center), and the snow-covered Sierra Nevada. Afternoon shadows sharply delineate a valley which parallels San Francisco Bay, crosses Point Reyes, and lies between the Bay and the Pacific coastline. This valley marks the location of the San Andreas Fault. Forces acting on the crust are causing the land west (bottom) of the fault line to move north relative to land on the east side. Agricultural areas in the Sacramento and San Joaquin Valleys are indicated by the tan areas which are easily discerned in contrast to the green-gray background.

1974-01-01

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Prediction des vibrations eoliennes d'un systeme conducteur-amortisseur avec une methode temporelle non lineaire  

Science.gov (United States)

Les vibrations eoliennes sont la cause principale de bris de conducteurs en fatigue des lignes aeriennes de transport d'energie electrique. Ces vibrations sont dues a des detachements tourbillonnaires produits dans le sillage du conducteur. Une methode commune de reduction des vibrations est l'ajout d'amortisseurs de vibrations pres des pinces de suspension. Contrairement aux essais en ligne experimentale, la modelisation numerique permet d'evaluer rapidement et a faible cout la performance d'un amortisseur de vibration sur une portee de ligne aerienne. La technologie la plus frequemment utilisee fait appel au principe de balance d'energie (PBE) en evaluant le niveau de vibrations pour lequel la puissance injectee par le vent est egale a la puissance dissipee par le conducteur et l'amortisseur. Les methodes actuelles pour la prediction des vibrations reposent sur des hypotheses simplificatrices quant a la modelisation de l'interaction conducteur-amortisseur. Une approche prometteuse pour la prediction des vibrations est l'utilisation d'un modele numerique temporel non lineaire qui permet de mieux representer la masse, la geometrie, la rigidite et l'amortissement du systeme. L'objectif principal de ce projet de recherche est de developper un modele numerique avec integration temporelle directe d'un conducteur et d'un amortisseur en vibration permettant de reproduire le comportement dynamique du systeme pour la gamme de frequence et d'amplitude typique des vibrations eoliennes des conducteurs. Un modele par elements finis d'un conducteur seul en vibration resolu par integration temporelle directe a d'abord ete developpe en considerant une rigidite de flexion variable. Comme une rigidite de flexion constante et egale a 50% de la rigidite de flexion maximale theorique ( EImax) est jugee adequate pour la modelisation du conducteur, c'est cette valeur qui a ete utilisee pour la suite du projet. Ensuite, des modeles non-lineaires pour deux types d'amortisseur de vibrations (Stockbridge et Hydro-Quebec) ont ete developpes. Ces modeles reproduisent adequatement le comportement dynamique des amortisseurs pour une grande gamme de frequences et d'amplitudes de deplacement. Finalement, les modeles d'amortisseur ont ete integres au modele de conducteur et uil nouvel outil de prediction de vibrations eoliennes base sur le principe de balance d'energie (PBE) a ete developpe. Celui-ci permet de bien reproduire des amplitudes de vibration mesurees sur une ligne experimentale, en particulier dans la gamme 8 a 35 Hz. A plus long terme, un tel modele pourrait servir de point de depart vers une modelisation temporelle complete du phenomene de vibrations eoliennes des conducteurs incluant l'excitation eolienne, l'auto-amortissement des conducteurs et des conditions limites realistes pour les lignes aeriennes. Mots-cles : dynamique de cable, elements finis, conducteurs, amortisseurs, vibrations eoliennes, lignes aeriennes electriques

Langlois, Sebastien

43

Relations of hydrogeologic factors, groundwater reduction-oxidation conditions, and temporal and spatial distributions of nitrate, Central-Eastside San Joaquin Valley, California, USA  

Science.gov (United States)

In a 2,700-km2 area in the eastern San Joaquin Valley, California (USA), data from multiple sources were used to determine interrelations among hydrogeologic factors, reduction-oxidation (redox) conditions, and temporal and spatial distributions of nitrate (NO3), a widely detected groundwater contaminant. Groundwater is predominantly modern, or mixtures of modern water, with detectable NO3 and oxic redox conditions, but some zones have anoxic or mixed redox conditions. Anoxic conditions were associated with long residence times that occurred near the valley trough and in areas of historical groundwater discharge with shallow depth to water. Anoxic conditions also were associated with interactions of shallow, modern groundwater with soils. NO3 concentrations were significantly lower in anoxic than oxic or mixed redox groundwater, primarily because residence times of anoxic waters exceed the duration of increased pumping and fertilizer use associated with modern agriculture. Effects of redox reactions on NO3 concentrations were relatively minor. Dissolved N2 gas data indicated that denitrification has eliminated >5 mg/L NO3-N in about 10% of 39 wells. Increasing NO3 concentrations over time were slightly less prevalent in anoxic than oxic or mixed redox groundwater. Spatial and temporal trends of NO3 are primarily controlled by water and NO3 fluxes of modern land use.

Landon, Matthew K.; Green, Christopher T.; Belitz, Kenneth; Singleton, Michael J.; Esser, Bradley K.

2011-09-01

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Poro-mechanics: from linear to nonlinear poro-elasticity and poro-visco-elasticity; Poromecanique: de la poroelasticite lineaire a la poroelasticite non lineaire et la poroviscoelasticite  

Energy Technology Data Exchange (ETDEWEB)

Due to the impact on productivity and oil an place estimates, reliable modeling of rock behavior is essential in reservoir engineering. This paper examines several aspects of rock poro-elastic behavior within the framework of Biot's mechanics of fluid saturated porous solids. Constitutive laws of linear and nonlinear poro-elasticity are first determined from a fundamental stress decomposition, which allows to clearly connect linear and nonlinear models. Concept of effective stress and rock compressibility are considered. Linear incremental stress-strain relations are derived from the proposed nonlinear constitutive law by defining tangent elastic properties. These characteristics are naturally functions of strains and pore pressure, but explicit expressions as functions of stresses and pore pressure are established herein. Experiments performed on a reservoir sandstone illustrate these points. A constitutive law of poro-visco-elasticity is finally presented and applied to experimental data obtained on clay. (authors)

Bemer, E.; Bouteca, M.; Vincke, O. [Institut Francais du Petrole (IFP), 92 - Rueil-Malmaison (France); Hoteit, N.; Ozanam, O. [Agence Nationale pour la Gestion des Dechets Radioactifs ANDRA, 92 - Chatenay Malabry (France)

2001-07-01

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Relative abundance and distribution of fishes within an established Area of Critical Environmental Concern, of the Amargosa River Canyon and Willow Creek, Inyo and San Bernardino Counties, California  

Science.gov (United States)

The Amargosa River Canyon of San Bernardino and Inyo County, California, has been designated by the Bureau of Land Management as an Area of Critical Environmental Concern, due in part to its unique flora and fauna. As a task of the Area of Critical Environmental Concern implementation plan, a survey of native fishes was conducted from June 21 to August 12, 2010. Geographic Information System tools were used to map sampling locations, which were spaced at 50-meter intervals. Global Positioning Systems were used to locate sampling stations, and stations with adequate water for successful trapping were sampled with baited minnow traps. Amargosa River pupfish (Cyprinodon nevadensis amargosae) and speckled dace (Rhinichthys osculus spp.) were widespread throughout Armargosa River Canyon. Throughout the study area 8,558 pupfish were captured at 194 stations; 3,472 speckled dace were captured at 210 stations; 238 red-swamp crayfish (Procambarus clarkia) were captured at 83 stations; and 1,095 western mosquitofish (Gambusia affinus) were captured at 110 stations. Pupfish were most abundant in open water habitat with native riparian vegetation, and they were significantly less abundant where the stream was completely covered by cattails or where saltcedar (Tamarix sp.) dominated the riparian corridor. There was no relationship between stream cover and speckled dace distribution. Non-native western mosquitofish and red-swamp crayfish densities were significantly higher in stream reaches dominated by saltcedar. The continued spread of saltcedar threatens to negatively affect pupfish and potentially reduce speckled dace abundance throughout the Amargosa River Canyon. This study can serve as baseline information for observing native fish populations in the future, as related to potential changes to the Amargosa River Canyon ecosystem.

Scoppettone, G. Gary; Hereford, Mark E.; Rissler, Peter H.; Johnson, Danielle M.; Salgado, Antonio

2011-01-01

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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)  

Scientific Electronic Library Online (English)

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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Origen de la calidad del agua del acuífero colgado y su relación con los cambios de uso de suelo en el Valle de San Luis Potosí / Origin of water quality of the hanging aquifer and its relation with changes in land use in the San Luis Potosí valley  

Scientific Electronic Library Online (English)

Full Text Available SciELO Mexico | Language: Spanish Abstract in spanish La historia de la ciudad San Luis Potosí se remonta al siglo XVI. Con el descubrimiento de yacimientos de oro y plata y la presencia de cuerpos de agua en el valle, fue fundada la ciudad San Luis Minas del Potosí, dando lugar a los dos primeros usos de suelo, urbano y minero. A partir del siglo XVII [...] , el uso de suelo agrícola se desarrolló en huertos y fue relegado a la periferia de la zona urbana en el transcurso del tiempo. Finalmente el uso de suelo industrial surgió de manera importante en la segunda mitad del siglo XX. En la actualidad los tres usos de suelo existentes dentro del Valle de San Luis Potosí son el urbano, agrícola e industrial. A través de una campaña de muestreo hidrogeoquímico en octubre de 2008, con 44 muestras de norias y 3 de manantiales dentro del valle, se evaluaron parámetros físico-químicos, cationes, aniones y elementos traza. En los tres usos de suelo en la zona de estudio fueron detectados niveles importantes de nitratos, sulfatos, cloruros, conductividad eléctrica, coliformes totales y fecales; sin embargo, en la zona urbana existen anomalías puntuales de metales pesados principalmente de mercurio, bario, estroncio, cadmio, plomo, fósforo y plata, relacionadas a las antiguas actividades mineras y a la industria activa en la zona. Mientras que en la zona agrícola, la presencia de metales está asociada a los canales a cielo abierto que también reciben agua del Tanque Tenorio y éste a su vez de la zona industrial. En la zona industrial se detectaron grandes anomalías de tipo puntual en casi todos los metales pesados analizados; la principal fuente de estos contaminantes corresponden a un terreno industrial activo. Este trabajo está enfocado a evaluar el impacto que ha generado la actividad antropogénica sobre el acuífero colgado del Valle de San Luis Potosí desde inicios de la fundación de la ciudad hasta la actualidad, utilizando la calidad del agua como herramienta de análisis. Abstract in english The history of San Luis Potosi City dates back to the sixteenth century. With the discovery of gold and silver deposits and the presence of water bodies in the valley, the city of San Luis Minas Potosí was founded, leading to the first two uses of land: urban and mining. From the seventeenth century [...] , agricultural land developed in orchards and, over time, was relegated to the periphery of the urban area. Finally, industrial land use emerged significantly in the second half of the twentieth century. Currently the three existing land uses within the Valley of San Luis Potosi are urban, agricultural and industrial. Through a hydrogeochemical sampling campaign in October 2008 with 44 samples from wells and 3 from springs within the valley, we assessed physical and chemical parameters, cations, anions and trace elements. In the three land uses within the study area, we detected significant levels of nitrates, sulphates, chlorides, electrical conductivity, total and fecal coliforms; but in urban areas there are punctual anomalies of heavy metals, mainly mercury, barium, strontium, cadmium, lead, phosphorus and silver related to former mining and active industry in the area. However, in the agricultural zone, the presence of metals is associated with open channels, which also receive water from the Tanque Tenorio and this in turn from the industrial area. In the industrial area, puntual anomalies were detected in almost all heavy analyzed metals; the main source of these pollutants corresponds to an active industrial area. This work aims to evaluate the impact of anthropogenic activity in the perched aquifer of the Valley of San Luis Potosí since the city's foundation to the present, using water quality as an analytical tool.

Briseida, López-Álvarez; José Alfredo, Ramos-Leal; Janete, Moran-Ramírez; Antonio, Cardona Benavides; Guillermo, Hernández Garcia.

2013-04-01

48

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

49

The Role of Social Support and Acculturative Stress in Health-Related Quality of Life Among Day Laborers in Northern San Diego  

OpenAIRE

There is evidence to suggest that Latino day laborers experience higher levels of acculturative stress than Latinos in employment sectors in the US. Given the stress-buffering role that social support plays in minimizing the negative physical and mental health outcomes of stress, this study examined this relationship in a sample of 70 Latino Day laborers in the northern San Diego area (100% male, mean age = 27.7, SD = 9.1). Results from multivariate regression analyses showed that there was a...

Salgado, Hugo; Castan?eda, Sheila F.; Talavera, Gregory A.; Lindsay, Suzanne P.

2012-01-01

50

O público e o privado na primeira LDB: a relação entre San Tiago Dantas e Anísio Teixeira / Public et privé dans la première LDB: la relation entre San Tiago Dantas et Anísio Teixeira / Public and private in the first LDB: the relationship between San Tiago Dantas and Anísio Teixeira / Público y privado en la primera LDB: la relación entre San Tiago Dantas y Anísio Teixeira  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Este trabalho teve por objetivo analisar uma carta do educador Anísio Teixeira para o deputado San Tiago Dantas datada de julho de 1959, durante o período em que tramitava o projeto de Lei de Diretrizes e Bases da Educação Nacional. Trata-se de um material cujo conteúdo esclarece a discussão entre o [...] s dois interlocutores sobre os substitutivos de lei propostos pelo deputado Carlos Lacerda, à época da tramitação do citado projeto. Este trabalho concluiu que a relação entre San Tiago Dantas e Anísio Teixeira, em oposição ao que estava sendo proposto pelos referidos substitutivos, convergia na defesa da escola pública questionando a transferência de recursos públicos para a iniciativa privada. Abstract in spanish Este estudio tuvo como objetivo analizar una carta del Sr. Teixeira para o Sr. San Tiago Dantas, de fecha julio de 1959, durante el período de la hora de proceder a través del proyecto de Ley de Directrices y Bases de la Educación Nacional. Este es un material cuyo contenido clarifica el debate entr [...] e las dos partes sobre el proyecto sustitutivo propuesto por el diputado Carlos Lacerda, en el momento de la realización de dicho proyecto. Este estudio llegó a la conclusión de que la relación entre San Tiago Dantas y Teixeira, a diferencia de lo que se proponía por los sustitutos, se reunieron en la defensa de la escuela pública en duda la transferencia de recursos públicos a la empresa privada. Abstract in english This study aimed to analyze a letter from Mr. Anísio Teixeira to the congressman San Tiago Dantas, dated July 1959, during the period when proceeding through the draft Law of Guidelines and Bases of National Education. This is a material whose content clarifies the discussion between the two parties [...] on the substitute bill proposed by Carlos Lacerda, at the time of the conduct of the said project. This study concluded that the relationship between San Tiago Dantas and Teixeira, as opposed to what was being proposed by those substitutes, converged on the defense of public school questioning the transfer of public resources to private enterprise.

José Antonio Miranda, Sepulveda.

2013-12-01

51

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.

52

The role of social support and acculturative stress in health-related quality of life among day laborers in Northern San Diego.  

Science.gov (United States)

There is evidence to suggest that Latino day laborers experience higher levels of acculturative stress than Latinos in employment sectors in the US. Given the stress-buffering role that social support plays in minimizing the negative physical and mental health outcomes of stress, this study examined this relationship in a sample of 70 Latino Day laborers in the northern San Diego area(100% male, mean age = 27.7, SD = 9.1). Results from multivariate regression analyses showed that there was a significant interaction effect between social support and acculturative stress (P = 0.025) on physical health, indicating that higher levels of social support buffered the negative effects of acculturative stress on physical health.Acculturative stress and social support were not associated with mental health status. Overall, these findings suggest that fostering social support may be an essential strategy for promoting health among Latino male day laborers. PMID:22286606

Salgado, Hugo; Castañeda, Sheila F; Talavera, Gregory A; Lindsay, Suzanne P

2012-06-01

53

Examination of spotted sand bass (Paralabrax maculatofasciatus) pollutant bioaccumulation in San Diego Bay, San Diego, California  

OpenAIRE

The spotted sand bass (Paralabrax maculatofasciatus) is an important recreational sport and subsistence food fish within San Diego Bay, a large industrialized harbor in San Diego, California. Despite this importance, few studies examining the species life history relative to pollutant tissue concentrations and the consumptive fishery exist. This study utilized data from three independent spotted sand bass studies from 1989 to 2002 to investigate PCB, DDT, and mercury tissue concentrations rel...

Loflen, Chad L.

2013-01-01

54

77 FR 54811 - Safety Zone; TriRock San Diego, San Diego Bay, San Diego, CA  

Science.gov (United States)

...aforementioned portion of the San Diego Bay from September 9...impacts only a small area of San Diego Harbor, and will be...AREAS AND LIMITED ACCESS AREAS 0 1. The authority citation...TriRock Triathlon; San Diego Bay, San Diego,...

2012-09-06

55

The Relative Effects of Wave Climatology and Tidal Currents on Beach Processes Adjacent to a Major Tidal Inlet, Ocean Beach, San Francisco, California  

Science.gov (United States)

Identifying the processes that control the morphological evolution of beaches adjacent to tidal inlets is challenging due to the complex interactions between waves, currents, and bathymetry, each with high spatial and temporal variability. In the shadow of the large ebb tidal delta at the mouth of San Francisco Bay, CA, the wave refraction patterns at Ocean Beach are complex and the effects of the offshore wave climate on beach and nearshore morphology cannot be assessed simply by analyzing data from an offshore wave buoy. Instead, the United States Geological Survey has employed a multi-faceted approach that links wave data with numerical modeling, periodic three- dimensional topographic beach surveys, cross shore bathymetric surveys using personal watercraft, onshore grain-size analysis using a bed sediment camera, and a multi-beam survey covering the entire mouth of San Francisco Bay. Initial analyses demonstrate that the spatial distribution of wave energy and direction controls short-term (i.e. days to years) beach evolution, including the location of erosional "hot spots." These conclusions are supported by topographic LIDAR surveys that covered the study area in 1997, 1998 and 2002, bracketing the last major El Niño/ Southern Oscillation cycles. In this study, SWAN (Simulating WAves Nearshore) modeling is combined with high resolution bathymetry and high resolution beach surveys to quantify short-term morphological change and to provide links to nearshore processes. Initial SWAN results show a focusing of wave energy at the location of an erosional hot-spot on the southern end of Ocean Beach during the prevailing northwest swell. During El Niño winters, swell out of the west and southwest dominates the region, and although the wave energy is focused further to the north on Ocean Beach, the oblique wave approach sets up a strong northerly littoral drift, thereby starving the southern end of sediment, leaving it increasingly vulnerable to wave attack when the typical northwest swell returns. Over longer time periods (i.e. decades), tidal processes emerge as the dominant control on coastal evolution is this region, as changes in sediment supply and depositional patterns exert a strong influence on the ebb tidal delta volume and morphology. The tidal delta, in turn, strongly influences wave shielding, refraction, and focusing patterns on adjacent beaches. An accurate assessment of the interaction between wave and tidal processes is crucial for evaluating coastal management options in an area that includes the annual dredging and disposal of ship channel sediment and an erosional hot spot that is posing a major threat to local infrastructure.

Barnard, P. L.; Hanes, D. M.; Ruggiero, P.

2004-12-01

56

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

57

Relative determination of the alkaloid metabolites of Er Miao San in rat urine by LC-MS/MS and its application to pharmacokinetics.  

Science.gov (United States)

In the present study, five metabolites of Cortex Phellodendri Chinensis, an important herbal drug, were identified using liquid chromatography multi-stage tandem mass spectrometric techniques (LC-MS(n)). A sensitive and rapid high-performance liquid chromatographic tandem mass spectrometry (LC-MS/MS) method was developed for the quantitation of the five metabolites, utilizing chlorobenzylidine as the internal standard in rat urine. Urine samples were precipitated with acetonitrile. Chromatographic separation was achieved on a Waters C18 analytical column. Detection was performed by a multiple reaction monitoring (MRM) mode via an electrospray ionization (ESI) source operating in the positive ionization mode. The method was linear over the concentration range of 0.05-1.00c for all components. The intra- and inter-day precision values were less than 14.6% and the deviations ranged from -4.4 to 13.8%. The recoveries at three levels were more than 73.7%. The fully validated method was used to determine the metabolites amount in rat urine to investigate the changes caused by coupling with Atractylodes lancea in Er Miao San preparation on metabolism. PMID:24508675

Yan, Fei; He, Huiwen; Yan, Rui

2014-03-01

58

ABUNDANCE OF THE EXCAVATING SPONGE CLIONA DELITRIX IN RELATION TO SEWAGE DISCHARGE AT SAN ANDRÉS ISLAND, SW CARIBBEAN, COLOMBIA / ABUNDANCIA DE LA ESPONJA EXCAVADORA CLIONA DELITRIX EN RELACIÓN CON DESCARGAS DE AGUAS SERVIDAS EN LA ISLA DE SAN ANDRÉS, CARIBE SUROCCIDENTAL, COLOMBIA  

Scientific Electronic Library Online (English)

Full Text Available SciELO Colombia | Language: English Abstract in spanish Se conoce que la esponja incrustante y excavadora del Caribe Cliona delitrix puede aumentar su abundancia en las cercanías de fuentes de aguas servidas. Para determinar si su notable abundancia actual en los arrecifes de sotavento de la Isla de San Andrés (Caribe SO, Colombia) está relacionada con l [...] a contaminación orgánica generada por las descargas locales de aguas servidas, se obtuvieron datos cuantitativos de densidad y cobertura de esta esponja y otros componentes bentónicos, en transectos de banda y línea en siete estaciones a lo largo de la terraza somera (5- 10 m de profundidad). Se obtuvo mucus de coral para cuantificar la bacteria Escherichia coli, como indicador de la influencia de las plumas de aguas servidas en la biota bentónica. Una regresión potencial negativa entre la cantidad de E. coli en mucus de coral y la distancia del tubo principal de salida de aguas servidas, demostró que las bacterias provienen de los desechos domésticos. Aunque hubo conteos significativos de E. coli solamente hasta 1-2 km de las fuentes de aguas servidas, la influencia general de estas aguas puede extenderse mucho más lejos, ya que se encontraron abundancias moderadas de C. delitrix a lo largo de la terraza somera occidental de San Andrés, aparentemente asociadas con el enriquecimiento general de nutrientes de las aguas servidas. Las abundancias de C. delitrix fueron menores en el suroccidente, lejos de la influencia de aguas servidas, e incrementaron en general hacia las fuentes, pero disminuyeron cerca del tubo de salida principal. Muy cerca de las fuentes de aguas servidas, cualquier efecto positivo en la esponja producido por un aumento en la materia orgánica en suspensión, probablemente es neutralizado por el efecto negativo que el exceso de sedimentación tiene sobre la esponja misma y sobre la cantidad y calidad del sustrato disponible para la colonización. Abstract in english It is known that the encrusting and excavating Caribbean sponge Cliona delitrix may increase its abundance near sources of sewage. To ascertain whether its current conspicuousness in leeward reefs of San Andrés Island (SW Caribbean, Colombia) is related to organic pollution from local raw sewage dis [...] charges, quantitative data on density and cover of this sponge and other benthic components was obtained from belt and line transects at seven stations along the shallow (5-10 m deep) terrace. Coral mucus was sampled to quantify Escherichia coli bacteria, as an approximate indicator of sewage plume influence on benthic biota. A negative multiplicative regression between amount of E. coli in coral mucus and distance from the main raw sewage outlet demonstrated the domestic-wastes origin of the bacteria. Whereas significant E. coli counts occurred only up to 1-2 km from sewage sources, overall sewage influence may extend further as moderate C. delitrix abundances occurred throughout the West shallow terrace of San Andrés, apparently associated to the overall nutrient enrichment from sewage. C. delitrix abundances were lower in the Southwest, farthest from sewage influence, and generally increased towards sewage sources, but decreased near the main sewage outlet. Close to sewage sources, any positive effect on the sponge brought about by the increase in suspended organic matter is probably outweighed by the negative effect that excessive sedimentation has on the sponge itself, and on the quantity and quality of substratum available for settlement.

Andia, Chaves-Fonnegra; Sven, Zea; Martha L., Gómez.

2007-12-01

59

Mercury concentrations in blood and feathers of prebreeding Forster's terns in relation to space use of San Francisco Bay, California, USA, habitats  

Science.gov (United States)

We examined mercury concentrations and space use of prebreeding Forster's terns (Sterna forsteri) in San Francisco Bay, California, USA, to assess factors influencing mercury levels in piscivorous birds. In 2005 and 2006, we collected blood and feathers from 122 Forster's terns and radio-marked and tracked 72 terns to determine locations of dietary mercury uptake. Capture site and capture date were the most important factors explaining variation in blood mercury concentrations (geometric mean ?? standard error: 1.09 ?? 0.89 ??g/g wet wt), followed by sex and year. Accordingly, radiotelemetry data revealed that Forster's terns generally remained near their site of capture and foraged in nearby salt ponds, managed and tidal marshes, and tidal flats. In contrast, capture site and capture date were not important factors explaining variation in feather mercury concentrations, probably because feathers were grown on their wintering grounds several months prior to our sampling. Instead, sex and year were the most important factors explaining mercury concentrations in breast feathers (9.57 ?? 8.23 ??g/g fresh wt), and sex was the most important factor for head feathers (6.94 ?? 7.04 ??g/g fresh wt). Overall, 13 and 22% of prebreeding Forster's terns were estimated to be at high risk for deleterious effects due to mercury concentrations in blood (>3.0 ??g/g wet wt) and feathers (>20.0 ??g/g fresh wt), respectively. Breeding terns are likely to be even more at risk because blood mercury concentrations more than tripled during the 45-d prebreeding time period. These data illustrate the importance of space use and tissue type in interpreting mercury concentrations in birds. ?? 2008 SETAC.

Ackerman, J.T.; Eagles-Smith, C. A.; Takekawa, J.Y.; Bluso, J.D.; Adelsbach, T.L.

2008-01-01

60

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

Science.gov (United States)

...2010-07-01 2010-07-01 false San Francisco Bay, San Pablo Bay, Carquinez...Anchorage Grounds § 110.224 San Francisco Bay, San Pablo Bay, Carquinez...Within the navigable waters of San Francisco Bay, San Pablo Bay,...

2010-07-01

61

The San Andreas Fault 'Supersite' (Invited)  

Science.gov (United States)

An expanded and permanent Supersite has been proposed to the Committee on Earth Observation Satellites (CEOS) for the San Andreas Fault system, based upon the successful initial Group on Earth Observations (GEO) Geohazard Supersite for the Los Angeles region from 2009-2013. As justification for the comprehensive San Andreas Supersite, consider the earthquake history of California, in particular the devastating M 7.8 San Francisco earthquake of 1906, which occurred along the San Andreas Fault, as did an earthquake of similar magnitude in 1857 in southern California. Los Angeles was only a small town then, but now the risk exposure has increased for both of California's megacities. Between the San Francisco and Los Angeles urban areas lies a section of the San Andreas Fault known to creep continually, so it has relatively less earthquake hazard. It used to be thought of as capable of stopping earthquakes entering it from either direction. Transitional behavior at either end of the creeping section is known to display a full range of seismic to aseismic slip events and accompanying seismicity and strain transient events. Because the occurrence of creep events is well documented by instrumental networks such as CISN and PBO, the San Andreas Supersite can be expected to be especially effective. A good baseline level of geodetic data regarding past events and strain accumulation and release exists. Many prior publications regarding the occurrence of geophysical phenomena along the San Andreas Fault system mean that in order to make novel contributions, state-of-the-art science will be required within this Supersite region. In more recent years, the 1989 Loma Prieta earthquake struck adjacent to the San Andreas Fault and caused the most damage along the western side of the San Francisco Bay Area. More recently, the concern has focused on the potential for future events along the Hayward Fault along the eastern side of San Francisco Bay. In Southern California, earthquakes struck in 1992 (Landers), 1994 (Northridge) and 1999 (Hector Mine) as well as the 2010 El Mayor - Cucapah (EM-C) earthquake (just south of the US-Mexico border). Of these four notable events, all produced extensive surface faulting except for the 1994 Northridge event, which was close to the Los Angeles urban area on a buried thrust fault. Northridge caused by far the most destruction, topping $20B (US) and resulting in 57 fatalities due to its location under an urban area. The Landers, Hector Mine and EM-C events occurred in desert areas away from major urban centers, and each proved to be a new and unique test-bed for making rapid progress in earthquake science and creative use of geodetic imagery. InSAR studies were linked to GPS deformation and mapping of surface ruptures and seismicity in a series of important papers about these earthquakes. The hazard in California remains extremely high, with tens of millions of people living in close proximity to the San Andreas Fault system as it runs past both San Francisco and Los Angeles. Dense in-situ networks of seismic and geodetic instruments are continually used for research and earthquake monitoring, as well as development of an earthquake early warning capability. Principles of peer review from funding agencies and open data availability will be observed for all data. For all of these reasons, the San Andreas Fault system is highly appropriate for consideration as a world-class permanent Supersite in the GEO framework.

Hudnut, K. W.

2013-12-01

62

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

63

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.

64

San Salvador Microbial Observatory  

Science.gov (United States)

This web site is home of the San Salvador Microbial Observatory, a project investigating the anhydrophilic, halotolerant microbial mats of San Salvador, Bahamas. This project has been developed to address the influence water availability has on structural diversification, community composition, production, and carbon sequestration in microbial mats. The web site includes general information about the project, a research description plan, an introduction to microbial mats, links to other microbial observatories and interesting sites, and a collection of photos. This is a helpful resource for those investigating microbial mat communities.

Tim Steppe

65

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

66

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

67

78 FR 58878 - Safety Zone; San Diego Shark Fest Swim; San Diego Bay, San Diego, CA  

Science.gov (United States)

...clear during the San Diego Shark Fest Swim. Persons and vessels...and reduce burden. 10. Protection of Children We have analyzed...under Executive Order 13045, Protection of Children from Environmental...T11-595 Safety Zone; San Diego Shark Fest Swim; San Diego...

2013-09-25

68

San Diego Flyby  

Science.gov (United States)

This scene shows Landsat Thematic Mapper data from the shortwave infrared (TM band 5), infrared (TM band 4), and visible green (TM band 2) channels of San Diego. The TM data was collected by Landsat 5 on the 12th of September, 1996.

Jesse Allen

1999-04-09

69

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...

70

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

71

Examination of spotted sand bass (Paralabrax maculatofasciatus pollutant bioaccumulation in San Diego Bay, San Diego, California  

Directory of Open Access Journals (Sweden)

Full Text Available The spotted sand bass (Paralabrax maculatofasciatus is an important recreational sport and subsistence food fish within San Diego Bay, a large industrialized harbor in San Diego, California. Despite this importance, few studies examining the species life history relative to pollutant tissue concentrations and the consumptive fishery exist. This study utilized data from three independent spotted sand bass studies from 1989 to 2002 to investigate PCB, DDT, and mercury tissue concentrations relative to spotted sand bass age and growth in San Diego Bay, with subsequent comparisons to published pollutant advisory levels and fishery regulations for recreational and subsistence consumption of the species. Subsequent analysis focused on examining temporal and spatial differences for different regions of San Diego Bay. Study results for growth confirmed previous work, finding the species to exhibit highly asymptotic growth, making tissue pollutant concentrations at initial take size difficult if not impossible to predict. This was corroborated by independent tissue concentration results for mercury, which found no relationship between fish size and pollutant bioaccumulation observed. However, a positive though highly variable relationship was observed between fish size and PCB tissue concentration. Despite these findings, a significant proportion of fish exhibited pollutant levels above recommended state recreational angler consumption advisory levels for PCBs and mercury, especially for fish above the minimum take size, making the necessity of at-size predictions less critical. Lastly, no difference in tissue concentration was found temporally or spatially within San Diego Bay.

Chad L. Loflen

2013-11-01

72

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 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

73

The San Andreas Fault  

Science.gov (United States)

This United States Geological Survey (USGS) publication discusses the San Andreas Fault in California; specifically what has caused the fault, where it is located, surface features that characterize it, and movement that has occurred. General earthquake information includes an explanation of what earthquakes are, and earthquake magnitude versus intensity. Earthquakes that have occurred along the fault are covered, as well as where the next large one may occur and what can be done about large earthquakes in general.

Sandra Schulz

74

Strain accumulation along the San Andreas fault system East of San Francisco Bay, California  

Science.gov (United States)

The occurrence of several large earthquakes to the east of San Francisco Bay during historical times, and present high levels of microseismicity, indicate that a significant part of the relative plate motion may be occurring east of San Francisco Bay. Furthermore, the Hayward fault is known to be slipping aseismically at the surface, and the Calaveras fault may be slipping aseismically also. These facts raise an important question: Is the observed creep rate accommodating all of the east bay deformation or is there a significant amount of strain accumulating along these faults? Several small survey networks (San Andreas fault system, suggesting that creep is relieving a large part of the strain in this area. ?? 1983.

Prescott, W.H.; Lisowski, M.

1983-01-01

75

Investigation of Quaternary slip rates along the Banning strand of the southern San Andreas Fault near San Gorgonio Pass  

Science.gov (United States)

Present-day Pacific-North American relative plate motion in southern California is shared primarily between the San Jacinto and San Andreas faults. At the north end of the Coachella Valley, the San Andreas fault splits into the Banning and Mission Creek strands, which are sub-parallel to each other within the Indio Hills. Northwest of the Indio Hills, the Mission Creek fault diverges from the Banning and continues northwest toward the southeastern San Bernardino Mountains, but loses surface expression beneath Quaternary alluvial deposits in Morongo Wash. The Banning fault, upon exiting the Indio Hills, is deflected toward the west and transitions into a structurally complex fault zone at San Gorgonio Pass, where it is delineated by thrust scarps in Holocene alluvium. The slip rates of the Banning and Mission Creek fault strands northwest of the Indio Hills and southeast of San Gorgonio Pass are presently unconstrained, but understanding how slip is partitioned between these two strands is critical to southern California earthquake forecasting efforts. Here we present preliminary slip rate data for the Banning fault ~2 km southeast of San Gorgonio Pass at Devers Hill. Using the B4 LiDAR as a base, we have mapped the extents of three truncated and offset alluvial fan deposits, which we have differentiated based on both field and remote (LiDAR- and air photo-based) observations of texture: in particular, the distribution of different clast sizes, pavement and soil development, and color and appearance. To confirm across-fault correlation of the displaced deposits, we have measured 26 cosmogenic Be-10 ages from boulders and cobble samples taken from each of the three fan surfaces on both sides of the fault. One debris flow deposit (Q2a) has been dated to ~80 ka, and appears to be offset 1.6-2.2 km, though confirming this reconstruction will depend on future excavations and uranium-series dating of soil carbonate. A second debris flow deposit (Q2b), for which ages are pending, has been displaced 1-1.6 km. Together, these measurements suggest a late Quaternary slip rate for the Banning strand of the San Andreas fault of about 12-24 mm/yr. Our preliminary slip rate measurement for the Banning strand just southeast of San Gorgonio Pass is consistent with the slip rate of the San Bernardino section of the San Andreas fault to the northwest, and suggests that averaged over late Quaternary timescales (~80 ka), displacement along the San Andreas south of San Gorgonio Pass may be more focused on the Banning strand than the Mission Creek strand.

Gold, P. O.; Behr, W. M.; Rood, D.; Kendrick, K. J.; Rockwell, T. K.; Sharp, W. D.

2013-12-01

76

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

77

San Diego's Capital Planning Process  

Science.gov (United States)

This article describes San Diego's capital planning process. As part of its capital planning process, the San Diego Unified School District has developed a systematic analysis of functional quality at each of its school sites. The advantage of this approach is that it seeks to develop and apply quantifiable metrics and standards for the more…

Lytton, Michael

2009-01-01

78

Development of a method for studying non-linear phenomena in plasma; Mise au point d'une methode d'etude des phenomenes non lineaires dans un plasma  

Energy Technology Data Exchange (ETDEWEB)

The study of non-linear phenomena resulting from the interaction of powerful electro-magnetic waves with an electron gas is the basis of the p best methods for measuring the frequency of electronic collisions in the ionosphere. In laboratory plasma the appearance of these phenomena is connected with a powerful critical field. Although we have used a relatively low-power electromagnetic source, we have been able to develop a simple hyper-frequency method making it possible to study these phenomena to measure them and to put forward an elementary interpretation. An electromagnetic wave provided by a 1 watt klystron interacts with a HF discharge (25 MHz) in the volume of a TE{sub 111} cavity. The tube containing the discharge and the axis of the cylindrical cavity are co-linear with a magnetic field which can attain a value such that the wave frequency is equal to the gyromagnetic frequency of the electrons. The resonance curve for the cavity, which depends on the electronic density and the frequency of collisions, becomes increasingly dissymmetric as the absorbed power increases and as the gyromagnetic frequency of the electrons approaches that of the incident wave. By studying the resonance, it is possible to calculate the proportionality coefficients relating the density and collision frequency variations with the absorbed power. The experiments were carried out by causing the following to vary separately: the incident UHF power, the initial electronic density, the pressure of the neutral ambient gas, and the axial magnetic field. The variation in the electronic density as a function of the magnetic field for a high UHF power shows a resonance of dissymmetrical form, sometimes with a sharp peak in the neighbourhood of {omega}{sub H}. The possibility of applying these properties to the construction of practical devices, is under consideration. (author) [French] L'etude des phenomenes non lineaires dus a l'interaction d'ondes electro-magnetiques puissantes avec un gaz d'electrons est a la base des meilleures methodes de mesure des frequences de collisions electroniques dans l'ionosphere. Dans les plasmas de laboratoire l'apparition de ces phenomenes est liee a un champ critique de valeur elevee. Tout en n'utilisant qu'une source electromagnetique de puissance relativement faible, nous avons mis au point une methode hyperfrequence simple qui permet de mettre ces phenomenes en evidence, de les mesurer et d'en donner une interpretation elementaire. Une onde electromagnetique, fournie par un klystron de 1 W de puissance, interagit avec une decharge HF (25 MHz) dans le volume d'une cavite TE{sub 111}. Le tube contenant la decharge et l'axe de la cavite cylindrique sont colineaires a un champ magnetique pouvant atteindre une valeur telle que la frequence de l'onde soit egale a la frequence gyromagnetique des electrons. La courbe de resonance de la cavite, qui depend de la densite electronique et de la frequence des collisions, devient d'autant plus dissymetrique que la puissance absorbee est grande et que la frequence gyromagnetique des electrons est voisine de la frequence de l'onde incidente. L'etude de la resonance permet de calculer les coefficients de proportionnalite qui relient les variations de la densite et de la frequence de collisions a la puissance absorbee. Les experiences ont ete faites en faisant varier separement: la puissance UHF incidente, la densite electronique initiale, la pression du gaz neutre ambiant, ainsi que le champ magnetique axial. La variation de la densite electronique en fonction du champ magnetique pour une puissance UHF forte, montre une resonance de forme dissymetrique avec quelquefois un pic aigu, au voisinage de {omega}{sub H}. L'application eventuelle des proprietes mises en evidence a la realisation de dispositifs pratiques est envisagee. (auteur)

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

1965-03-01

79

75 FR 55975 - Safety Zone; San Diego Harbor Shark Fest Swim; San Diego Bay, San Diego, CA  

Science.gov (United States)

...read as follows: Sec. 165.T11-332 Safety Zone; San Diego Harbor Shark Fest Swim; San Diego Bay, San Diego, CA. (a) Location. The following area is a safety zone: All the navigable waters of the San Diego Bay bounded by the...

2010-09-15

80

77 FR 42647 - Safety Zone: San Diego Symphony POPS Fireworks; San Diego, CA  

Science.gov (United States)

...navigable waters of San Diego Bay in support of the San...from a barge in San Diego Bay. The barge will be located...a portion of San Diego Bay from 9 p.m. to 10 p...safety or security of people, places or vessels...Fireworks; San Diego, California. (a) Location....

2012-07-20

81

New evidence on the state of stress of the san andreas fault system.  

Science.gov (United States)

Contemporary in situ tectonic stress indicators along the San Andreas fault system in central California show northeast-directed horizontal compression that is nearly perpendicular to the strike of the fault. Such compression explains recent uplift of the Coast Ranges and the numerous active reverse faults and folds that trend nearly parallel to the San Andreas and that are otherwise unexplainable in terms of strike-slip deformation. Fault-normal crustal compression in central California is proposed to result from the extremely low shear strength of the San Andreas and the slightly convergent relative motion between the Pacific and North American plates. Preliminary in situ stress data from the Cajon Pass scientific drill hole (located 3.6 kilometers northeast of the San Andreas in southern California near San Bernardino, California) are also consistent with a weak fault, as they show no right-lateral shear stress at approximately 2-kilometer depth on planes parallel to the San Andreas fault. PMID:17839366

Zoback, M D; Zoback, M L; Mount, V S; Suppe, J; Eaton, J P; Healy, J H; Oppenheimer, D; Reasenberg, P; Jones, L; Raleigh, C B; Wong, I G; Scotti, O; Wentworth, C

1987-11-20

82

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

83

Tsunami Hazards in San Francisco Bay  

Science.gov (United States)

A prerequisite to probabilistic hazard assessment is a historic event database and identification of all potential sources. We review published and unpublished material to compile a history of tsunami events, peak tsunami heights and tsunami source regions for San Francisco Bay. Since 1850, 51 credible tsunamis have been recorded or observed within the San Francisco Bay area, all but 6 teletsunamis. Only the tsunamis generated by the 1960 Chile earthquake and the 1964 Alaska earthquake caused damage in San Francisco Bay. Both events are characterized by long duration (12 hours) short period oscillations (about 30 minutes) attributed to near-resonance within the Bay (Wilson and Torum, 1968). Magoon (1966) developed an attenuation relation based on the 1960 and 1964 events and shows an amplitude decay by 50 percent of the Presidio value at Alameda and a 90 percent decrease at the northern and southern ends of the Bay. The 1964 tsunami was the most damaging historic event and caused about 177,000 (US dollars) in damages to boats and floating structures, with 1.13 m amplitude waves recorded at the Presidio. Six credible local tsunami events were observed between 1851 and 1906, four attributed to earthquake sources and two to landslides. The largest (0.6 m near Benicia) was caused by the 1898 Mare Island earthquake and is attributed to slip on the Rogers Creep fault. Garcia and Houston (1975) made return estimates for San Francisco Bay, considering only Alaska sources and estimated 100- and 500-year heights of 2.5 and 4.8 meters respectively at the Presidio. These values need to be reassessed in light of other credible teletsunami sources, particularly the Cascadia subduction zone, and local sources including step-overs on regional strike-slip faults and landslides within the bay. We present the results of numerical modeling runs to test Magoon's attenuation models and to compare local and teletsunami source regions.

Dengler, L.; Borrero, J.; Patton, J.

2004-12-01

84

76 FR 75908 - Notice of Inventory Completion: The University of California, San Diego, San Diego, CA  

Science.gov (United States)

...University of California, San Diego Officials of the University of California, San Diego have determined that: The...ceded to the United States an area that includes present-day San Diego County. The...

2011-12-05

85

How Long Will It Take for Los Angeles and San Francisco to Meet?  

Science.gov (United States)

By examining GPS time series plots from stations on opposing sides of the San Andreas Fault, students will determine the relative movement between the two stations. They can then apply this to calculate the time it will take for Los Angeles to reach San Francisco. Background information and necessary equations are provided. There is also a link provided to print out the time series.

86

How Long Will It Take for Los Angeles and San Francisco to Meet?  

Science.gov (United States)

By examining GPS time series plots from stations on opposing sides of the San Andreas Fault, students will determine the relative movement between the two stations. They can then apply this to calculate the time it will take for Los Angeles to reach San Francisco. Background information and necessary equations are provided. There is also a link provided to print out the time series.

2011-05-09

87

77 FR 48532 - Notice of Intent To Repatriate Cultural Items: San Diego State University, San Diego, CA  

Science.gov (United States)

...Notice of Intent To Repatriate Cultural Items: San Diego State University, San Diego, CA AGENCY: National Park Service, Interior...SUMMARY: The San Diego State University Archaeology Collections...

2012-08-14

88

Factores presentes en la deserción universitaria en la Facultad de Psicología de la Universidad De San Buenaventura, sede Bogotá en el periodo comprendido entre 1998-2009 / Factors related to the college dropout in the Faculty of Psychology at San Buenaventura University Bogotá in the period 1998-2009  

Scientific Electronic Library Online (English)

Full Text Available El objetivo del presente estudio fue describir los factores socio demográficos y las categorías del modelo psicológico de Ethington, presentes en la deserción universitaria, evaluados por medio de una encuesta telefónica diseñada con base en estas categorías y validada por jueces. Los participantes [...] tenían entre 16 y 32 años, solteros, de estratos 3 y 4. Los resultados descriptivos permiten concluir que existen diversas causas para que se presente la deserción en la Facultad de Psicología de la Universidad San Buenaventura, sede Bogotá. Dificultades tales como incompatibilidad del horario de estudio con el horario de trabajo, escasa información respecto al programa elegido al ingresar a la Universidad y dificultades de salud. Es importante destacar que la categoría que presentó el porcentaje más alto fue la de apoyo económico familiar con un 95%. Abstract in english The purpose of this study was to describe the categories as well as the socio-demographic aspects of Ethington's psychological model, present in the university dropout. In order to do that, those aspects were assessed using a telephone survey validated by judges. Participants were between 16 and 32 [...] years, single, from 3 and 4 social stratum. The results show that there are various reasons for dropout in the Faculty of Psychology at the University of San Buenaventura, such as: incompatibility between study and work schedules, unsuitable or insufficient information when going to University and finally, health difficulties.

María Juliana, Mateus Rodríguez; Consuelo, Herrera Hernández; Catalina, Perilla Suárez; Gilma, Parra Quecan; Anderssen, Vera Maldonado.

2011-01-01

89

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

90

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.

91

Parkfield: Plans for a San Andreas Fault Observatory at Depth  

Science.gov (United States)

Building on more than 15 years of experience from the Parkfield Earthquake Experiment, the National Science Foundation (NSF) and the USGS started in June 2004 to drill a deep hole in order to install instruments directly within the San Andreas Fault Zone near the initiation point of previous magnitude 6 Parkfield earthquakes (drill hole location in relation to slip rate). These instruments, set 2 to 3 km beneath the Earth's surface, will form a San Andreas Fault Observatory at Depth (SAFOD). This project will directly reveal, for the first time, the physical and chemical processes controlling earthquake generation within a seismically active fault.

92

33 CFR 165.1185 - Regulated Navigation Area; San Francisco Bay, San Pablo Bay, Carquinez Strait, Suisun Bay...  

Science.gov (United States)

...Francisco Bay, San Pablo Bay, Carquinez Strait...connecting waters in California. 165.1185...Francisco Bay, San Pablo Bay, Carquinez Strait...connecting waters in California. (a) Location...of San Francisco Bay, San Pablo Bay,...

2010-07-01

93

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

94

San Language Development for Education in South Africa: The South African San Institute and the San Language Committees  

Science.gov (United States)

This article focuses on the 3 San communities in South Africa: the !Xun, the Khwe, and the [image omitted]Khomani San. The !Xun and Khwe communities are living in Platfontein, near Kimberley in the Northern Cape. The [image omitted]Khomani San community is living in Upington and in the southern Kalahari, which are also in the Northern Cape. This…

Pamo, Billies

2011-01-01

95

BotEC: The San Andreas Fault's Rate of Movement  

Science.gov (United States)

Question: The San Andrea is an active fault zone, marked by frequent earthquake activity. The crust southwest of this strike-slip fault (including Los Angeles) is sliding to the northwest relative to the other side. It is possible to estimate the average annual rate of movement by recognizing rock of an earlier geologic age that have been cut and offset by the lateral movement along the fault. Below is a generalized geologic map of southern California, which shows Pliocene-Miocene age rocks offset along the San Andreas fault. The age of these rocks have been determined to be 25 million years. What is the average annual rate of movement in centimeters per year along the San Andreas fault?

Peter Kresan

96

Chinatown Chinese: The San Francisco Dialect.  

Science.gov (United States)

Discusses factors that make the language spoken in San Francisco's Chinatown so dynamic and, at times, inconsistent. Provides a glossary that includes transliterated and partially transliterated terms, translated terms, new terms, and special San Francisco terms. (Author/GC)

Dong, Lorraine; Hom, Marlon K.

1980-01-01

97

33 CFR 165.754 - Safety Zone: San Juan Harbor, San Juan, PR.  

Science.gov (United States)

...2010-07-01 2010-07-01 false Safety Zone: San Juan Harbor, San Juan, PR. 165.754 Section 165.754 Navigation...Seventh Coast Guard District § 165.754 Safety Zone: San Juan Harbor, San Juan, PR. (a) Regulated...

2010-07-01

98

76 FR 55796 - Safety Zone; TriRock Triathlon, San Diego Bay, San Diego, CA  

Science.gov (United States)

...USCG-2011-0789] RIN 1625-AA00 Safety Zone; TriRock Triathlon, San Diego Bay, San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Temporary...safety zone upon the specified navigable waters of the San Diego Bay, San Diego, California, in support of...

2011-09-09

99

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

Science.gov (United States)

...Safety Zone; Centennial of Naval Aviation Kickoff, San Diego Bay, San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Notice...proposes a temporary safety zone on the navigable waters of San Diego Bay in San Diego, CA in support of the...

2011-01-10

100

75 FR 38412 - Safety Zone; San Diego POPS Fireworks, San Diego, CA  

Science.gov (United States)

...RIN 1625-AA00 Safety Zone; San Diego POPS Fireworks, San Diego, CA...PART 165--REGULATED NAVIGATION AREAS AND LIMITED ACCESS AREAS 0 1. The authority citation for...165.T11-338 Safety Zone; San Diego POPS Fireworks, San Diego,...

2010-07-02

101

76 FR 45693 - Safety Zone; San Diego POPS Fireworks, San Diego, CA  

Science.gov (United States)

...RIN 1625-AA00 Safety Zone; San Diego POPS Fireworks, San Diego, CA...PART 165--REGULATED NAVIGATION AREAS AND LIMITED ACCESS AREAS 0 1. The authority citation for...165.T11-431; Safety zone; San Diego POPS Fireworks, San Diego,...

2011-08-01

102

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

103

Update: San Andreas Fault experiment  

Science.gov (United States)

Satellite laser ranging techniques are used to monitor the broad motion of the tectonic plates comprising the San Andreas Fault System. The San Andreas Fault Experiment, (SAFE), has progressed through the upgrades made to laser system hardware and an improvement in the modeling capabilities of the spaceborne laser targets. Of special note is the launch of the Laser Geodynamic Satellite, LAGEOS spacecraft, NASA's only completely dedicated laser satellite in 1976. The results of plate motion projected into this 896 km measured line over the past eleven years are summarized and intercompared.

Christodoulidis, D. C.; Smith, D. E.

1984-01-01

104

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

105

Marketing San Juan Basin gas  

International Nuclear Information System (INIS)

Marketing natural gas produced in the San Juan Basin of New Mexico and Colorado principally involves four gas pipeline companies with significant facilities in the basin. The system capacity, transportation rates, regulatory status, and market access of each of these companies is evaluated. Because of excess gas supplies available to these pipeline companies, producers can expect improved take levels and prices by selling gas directly to end users and utilities as opposed to selling gas to the pipelines for system supply. The complexities of transporting gas today suggest that the services of an independent gas marketing company may be beneficial to smaller producers with gas supplies in the San Juan Basin

106

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

107

Perspective View, San Andreas Fault  

Science.gov (United States)

The prominent linear feature straight down the center of this perspective view is the San Andreas Fault in an image created with data from NASA's shuttle Radar Topography Mission (SRTM), which will be used by geologists studying fault dynamics and landforms resulting from active tectonics. This segment of the fault lies west of the city of Palmdale, California, about 100 kilometers (about 60 miles) northwest of Los Angeles. The fault is the active tectonic boundary between the North American plate on the right, and the Pacific plate on the left. Relative to each other, the Pacific plate is moving away from the viewer and the North American plate is moving toward the viewer along what geologists call a right lateral strike-slip fault. This area is at the junction of two large mountain ranges, the San Gabriel Mountains on the left and the Tehachapi Mountains on the right. Quail Lake Reservoir sits in the topographic depression created by past movement along the fault. Interstate 5 is the prominent linear feature starting at the left edge of the image and continuing into the fault zone, passing eventually over Tejon Pass into the Central Valley, visible at the upper left.This type of display adds the important dimension of elevation to the study of land use and environmental processes as observed in satellite images. The perspective view was created by draping a Landsat satellite image over an SRTM elevation model. Topography is exaggerated 1.5 times vertically. The Landsat image was provided by the United States Geological Survey's Earth Resources Observations Systems (EROS) Data Center, Sioux Falls, South Dakota.Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on February 11,2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect three-dimensional measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter-long (200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between the National Aeronautics and Space Administration (NASA), the National Imagery and Mapping Agency (NIMA) of the U.S. Department of Defense (DoD), and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Earth Science Enterprise,Washington, DC.Size: Varies in a perspective view Location: 34.78 deg. North lat., 118.75 deg. West lon. Orientation: Looking Northwest Original Data Resolution: SRTM and Landsat: 30 meters (99 feet) Date Acquired: February 16, 2000

2000-01-01

108

Phospholipid Fatty Acid Analysis of Algal Communities in the San Luis Drain, California  

Science.gov (United States)

Algal, bacterial, and zooplankton biomass and species diversity were examined by measuring phospholipid fatty acid (PLFA) in water samples along the San Luis Drain in the San Joaquin Valley of California. Algal growth has been has been identified as a major cause of the degradation of water quality in the San Joaquin River. The San Luis Drain is a concrete lined channel than transports agricultural drainage water from the west side of the San Joaquin Valley to the San Joaquin River. Understanding the growth of algae in the San Luis Drain, a potential major input of algae into the San Joaquin River, is central in understanding potential algal control measures for this region. Samples were taken along the length of the drain in early, mid and late summer. Signature fatty acids were used to understand the ecology of algal and zooplankton through total lipid analysis and by analyzing shifts in PLFA composition. It was found that lipids associated with algal growth were highly correlated with chlorophyll measurements, and dips in the chlorophyll concentration corresponded to an increase in zooplankton lipids. Algal community structure was relatively constant along the drain during a sampling event but shifted significantly between sampling event through the summer season.

Borglin, S. E.; Stringfellow, W. T.; Hanlon, J. S.

2005-12-01

109

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.

110

San Diego Area Traffic Report  

Science.gov (United States)

Maxwell Laboratories and Caltrans have made availible real- time traffic information for San Diego, California, USA freeways via the World Wide Web. Current freeway speeds and flow rates, along with daily construction closures and updated freeway incident reports are available in both graphical and text formats. The information is normally updated about once a minute.

111

A simulation of the San Andreas fault experiment  

Science.gov (United States)

The San Andreas fault experiment (Safe), which employs two laser tracking systems for measuring the relative motion of two points on opposite sides of the fault, has been simulated for an 8-yr observation period. The two tracking stations are located near San Diego on the western side of the fault and near Quincy on the eastern side; they are roughly 900 km apart. Both will simultaneously track laser reflector equipped satellites as they pass near the stations. Tracking of the Beacon Explorer C spacecraft has been simulated for these two stations during August and September for 8 consecutive years. An error analysis of the recovery of the relative location of Quincy from the data has been made, allowing for model errors in the mass of the earth, the gravity field, solar radiation pressure, atmospheric drag, errors in the position of the San Diego site, and biases and noise in the laser systems. The results of this simulation indicate that the distance of Quincy from San Diego will be determined each year with a precision of about 10 cm. Projected improvements in these model parameters and in the laser systems over the next few years will bring the precision to about 1-2 cm by 1980.

Agreen, R. W.; Smith, D. E.

1974-01-01

112

78 FR 19103 - Safety Zone; Spanish Navy School Ship San Sebastian El Cano Escort; Bahia de San Juan; San Juan, PR  

Science.gov (United States)

...Part 165 [Docket No. USCG-2013-0166] RIN 1625-AA00 Safety Zone; Spanish Navy School Ship San Sebastian El Cano Escort; Bahia de San Juan; San Juan, PR AGENCY: Coast Guard, DHS. ACTION: Temporary final...

2013-03-29

113

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 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

114

La fiesta de San Juan en San Pedro Manrique (Soria  

Directory of Open Access Journals (Sweden)

Full Text Available San Pedro Manrique 1 es una villa soriana, perteneciente al partido judicial de Agreda, y que dista 46 kms. de la capital de la provincia. Se halla situada en la parte norte de la misma, mirando, pues, al Ebro, donde desemboca el Linares que riega su término, situado entre las sierras Cebollera y el Moncayo. Está a una altura de 1.075 m. sobre el nivel del mar y cuenta con 1.000 habitantes en números redondos.

L. CORTÉS

2009-10-01

115

The Purisima Formation and related rocks (upper Miocene - Pliocene), greater San Francisco Bay area, central California; review of literature and USGS collection now housed at the Museum of Paleontology, University of California, Berkeley  

Science.gov (United States)

Sedimentary rocks more than 1.6 kilometers thick are attributed to the upper Miocene to upper Pliocene Purisima Formation in the greater San Francisco Bay area. These rocks occur as scattered, discontinuous outcrops from Point Reyes National Seashore in the north to south of Santa Cruz. Lithologic divisions of the Formation appear to be of local extent and are of limited use in correlating over this broad area. The Purisima Formation occurs in several fault-bounded terranes which demonstrate different stratigraphic histories and may be found to represent more than a single depositional basin. The precise age and stratigraphic relationship of these scattered outcrops are unresolved and until they are put into a stratigraphic and paleogeographic context the tectonic significance of the Purisima Foramtion can only be surmised. This paper will attempt to resolve some of these problems. Mollusks and echinoderms are recorded from the literature and more than 70 USGS collections that have not previously been reported. With the exception of one locality, the faunas suggest deposition in normal marine conditions at water depths of less than 50 m and with water temperatures the same or slightly cooler than exist along the present coast of central California. The single exception is a fauna from outcrops between Seal Cove and Pillar Point, where both mollusks and foraminifers suggest water depths greater than 100 m. Three molluscan faunas, the La Honda, the Pillar Point, and the Santa Cruz, are recognized based on USGS collections and published literature for the Purisima Formation. These biostratigraphically distinct faunas aid in the correlation of the scattered Purisima Formation outcrops. The lowermost La Honda fauna suggests shallow-water depths and an age of late Miocene to early Pliocene. This age is at odds with a younger age determination from an ash bed in the lower Purisima Formation along the central San Mateo County coast. The Pillar Point fauna contains only a single age diagnostic taxon, Lituyapecten purisimaensis (Arnold), which is reported as Pliocene in age, but it only occurs in the Purisima Formation, so its age here is an example of circular reasoning. However, based on tentative lithologic correlations this fauna may represent the same period of time as the upper part of the La Honda fauna. This fauna differs from either the La Honda or Santa Cruz faunas in that it represent significantly deeper water. The uppermost Santa Cruz fauna also suggests shallow-water depths and a possible age range of early to late Pliocene. The bivalve molluscan taxon Lyonsia, and gastropod taxon Rictaxis sp., cf. R. punctocaelatus (Carpenter) are reported here for the first time from the Purisima Formation.

Powell, C.L., II

1998-01-01

116

San Antonio Museum of Art  

Science.gov (United States)

Created in 1925 as the San Antonio Museum Association, the organization later became the San Antonio Museum of Art (SAMA) and also operated the Witte Museum of Science and History. Over its long history, the SAMA has become well-known for its collection of pre-Columbian art, along with its holdings in 18th through 20th century American and European paintings and sculpture. On their website, visitors can peruse their upcoming events, view highlights from their collection, and look over interactive features about their new and previous shows. Two of the archived highlights here include an exhibit on photography from the Mexican Revolution and their collection of Asian art. Teachers should make sure and look over their "Education" area, as it contains materials to use in the classroom, as well as information about special programs at SAMA.

117

Ecología térmica de la lagartija endémica Liolaemus eleodori (Iguania: Liolaemidae) en el Parque Nacional San Guillermo, San Juan, Argentina / Thermal ecology of the endemic lizard Liolaemus eleodori (Iguania: Liolaemidae) in National Park San Guillermo, San Juan, Argentina  

Scientific Electronic Library Online (English)

Full Text Available La ecología térmica de la lagartija endémica Liolaemus eleodori fue estudiada en el Parque Nacional San Guillermo, provincia de San Juan, Argentina. Los datos fueron colectados durante diciembre de 2004 y febrero de 2005. Se registró la temperatura cloacal (Tb), substrato (Ts) y aire (Ta), con un te [...] rmómetro de lectura rápida. Liolaemus eleodori presentó una estrategia termorregulatoria de tipo termoconformista con un patrón de actividad de tipo unimodal y uso preferencial del microhábitat suelo desnudo (desprovisto completamente de vegetación). Nuestros datos sugieren que la estrategia termorregulatoria, el uso del espacio y el tiempo están estrechamente relaciondos con las condiciones climáticas rigurosas del sitio de estudio. Abstract in english The thermal ecology of the endemic lizard Liolaemus eleodori was studied at the San Guillermo National Park, Province of San Juan, Argentina. Data were collected during December 2004 and February 2005. Cloacal (Tc), substrate (Ts) and air (Ta) temperatures were registered using a quick reading therm [...] ometer. Liolaemus eleodori exhibited a thermo-conformist thermoregulatory strategy with a unimodal pattern of activity, showing a marked preference for a naked ground microhabitat (completely free of vegetation). Our data suggest that the thermoregulatory strategy and use of space and time is strictly related to the harsh climatic conditions of the study site.

Héctor J., Villavicencio; Juan C., Acosta; Graciela M., Blanco; José A., Marinero.

2012-06-01

118

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

119

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

120

75 FR 15611 - Safety Zone; United Portuguese SES Centennial Festa, San Diego Bay, San Diego, CA  

Science.gov (United States)

...as follows: PART 165--REGULATED NAVIGATION AREAS AND LIMITED ACCESS AREAS 0 1. The authority citation for part 165 continues...Zone; United Portuguese SES Centennial Festa; San Diego Bay, San Diego, CA. (a) Location. The limits of the...

2010-03-30

121

78 FR 35593 - Special Local Regulation; Christmas Boat Parade, San Juan Harbor; San Juan, PR  

Science.gov (United States)

...Register. B. Regulatory History and Information The current...the United States during the Christmas Boat Parade. D. Discussion...San Juan is sponsoring the Christmas Boat Parade. The event will...Special Local Regulation; Christmas Boat Parade, San Juan...

2013-06-13

122

La extensión de los suelos yesosos en San Luis Potosí, México.  

OpenAIRE

[EN] The gypseous soils of San Luis Potosí State, México, are not well map-delimited, despite their broad extent and the specificagricultural and environmental management they require. The present article highlights the location and extent of the gypseous lands in the Altiplano and Zona Media of San Luis Potosí State. For this purpose, soil, geology and vegetation maps as well as studies related to gypsum-rich soils, aerial photographs, and satellite maps (termed ‘espaciomapas’ in Span...

Marti?nez-montoya, Juan F.; Herrero Isern, Juan; Aceves Alba, Jorge; Palacio-nunez, Jorge; Ruiz-vera, Vi?ctor M.; Olmos-oropeza, Genaro

2012-01-01

123

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

124

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

125

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

126

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

127

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

128

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

129

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

130

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

131

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

132

Walking Field Trip to the San Andreas Fault  

Science.gov (United States)

In preparation for this walking field trip to the San Andreas Fault, students ideally have attended two lecture sessions where plate boundary processes and features have been discussed formally. The expected outcomes include students that are capable of calculating rupture length based on elastic rebound theory, recurrence interval, and relative plate motion and rates. The field trip procedure and details for each stop are included in the lab manual below.

Fred Winkler

133

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

134

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

135

75 FR 55270 - Safety Zone; NASSCO Launching of USNS Washington Chambers, San Diego Bay, San Diego, CA  

Science.gov (United States)

...Zone; NASSCO Launching of USNS Washington Chambers, San Diego Bay, San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Temporary...temporary safety zone on the navigable waters of the San Diego Bay in support of the NASSCO Ship Launching...

2010-09-10

136

75 FR 8106 - Don Edwards San Francisco Bay National Wildlife Refuge, Alameda, Santa Clara, and San Mateo...  

Science.gov (United States)

...Edwards San Francisco Bay National Wildlife Refuge, Alameda, Santa Clara...Edwards San Francisco Bay National Wildlife Refuge located in Alameda, Santa...Mail: San Francisco Bay National Wildlife Refuge Complex, 9500...

2010-02-23

137

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

138

Coastal processes study at Ocean Beach, San Francisco, CA: summary of data collection 2004-2006  

Science.gov (United States)

Ocean Beach in San Francisco, California, contains a persistent erosional section in the shadow of the San Francisco ebb tidal delta and south of Sloat Boulevard that threatens valuable public infrastructure as well as the safe recreational use of the beach. Coastal managers have been discussing potential mediation measures for over a decade, with little scientific research available to aid in decision making. The United States Geological Survey (USGS) initiated the Ocean Beach Coastal Processes Study in April 2004 to provide the scientific knowledge necessary for coastal managers to make informed management decisions. This study integrates a wide range of field data collection and numerical modeling techniques to document nearshore sediment transport processes at the mouth of San Francisco Bay, with emphasis on how these processes relate to erosion at Ocean Beach. The Ocean Beach Coastal Processes Study is the first comprehensive study of coastal processes at the mouth of San Francisco Bay.

Barnard, Patrick L.; Eshleman, Jodi; Erikson, Li H.; Hanes, Daniel M.

2007-01-01

139

Postseismic relaxation along the San Andreas fault at Parkfield from continuous seismological observations.  

Science.gov (United States)

Seismic velocity changes and nonvolcanic tremor activity in the Parkfield area in California reveal that large earthquakes induce long-term perturbations of crustal properties in the San Andreas fault zone. The 2003 San Simeon and 2004 Parkfield earthquakes both reduced seismic velocities that were measured from correlations of the ambient seismic noise and induced an increased nonvolcanic tremor activity along the San Andreas fault. After the Parkfield earthquake, velocity reduction and nonvolcanic tremor activity remained elevated for more than 3 years and decayed over time, similarly to afterslip derived from GPS (Global Positioning System) measurements. These observations suggest that the seismic velocity changes are related to co-seismic damage in the shallow layers and to deep co-seismic stress change and postseismic stress relaxation within the San Andreas fault zone. PMID:18787165

Brenguier, F; Campillo, M; Hadziioannou, C; Shapiro, N M; Nadeau, R M; Larose, E

2008-09-12

140

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

141

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)

142

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

Scientific Electronic Library Online (English)

Full Text Available 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

143

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.

144

Edificio San Cristobal -Alicante- España  

Directory of Open Access Journals (Sweden)

Full Text Available The San Cristóbal Building has been constructed in the very center of the city of Alicante and is considered as one of the most singular buildings of Europe. Among its outstanding characteristic, we can point out. In addition to the facade -unique- in fire-lacquered aluminium, the fact of its extremely deep foundations lined by hundreds of tons of concrete due to the geological conditions of the ground. It has four parking floors, ground floor, four floors four dwellings. The construction of this building, which lasted two years, signifies a step forward and a decisive contribution to world architecture.

Se ha construido en Alicante, en pleno centro de la ciudad, el Edificio San Cristóbal considerado como uno de los más singulares de Europa. Entre sus características más destacadas podemos señalar, además de la fachada - única- de aluminio lacado al fuego, el hecho de tener una cimentación muy profunda revestida por cientos de toneladas de hormigón debido a las condiciones geológicas del suelo. Posee cuatro plantas de aparcamiento, planta baja, cuatro plantas de oficinas y cuatro viviendas. La construcción de este edificio, cuya duración ha sido de dos años, ha supuesto un avance y un decisivo aporte a la arquitectura mundial.

Navarro Guzmán, Alfonso

1980-11-01

145

Cancer epidemiology in the San Francisco Bay Area.  

Science.gov (United States)

The Third National Cancer Survey of 1969--71 included the five counties of the San Francisco--Oakland Standard Metropolitan Statistical Area. The complete cancer reporting for this area, begun by the Third National Cancer Survey, was continued by the California Tumor Registry as part of the San Francisco Bay Area Resource for Cancer Epidemiology. The population-based cancer-reporting system provided an excellent data base for epidemiologic studies, a number of which (planned or in progress) were described briefly. Those in progress include: cancer of the ovary, corpus uteri, and breast as related to child bearing, fertility, exogenous hormones, etc.; the relationship of diet to breast cancer occurrence among Japanese; diet and colorectal cancer among blacks; and the relationship of cervical cancer to cytology in Alameda County. Other study proposals are under consideration. PMID:613252

Dunn, J E; Austin, D F

1977-12-01

146

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

147

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

148

Mechanical insights into tectonic reorganization of the southern San Andreas fault system at ca. 1.1-1.5 Ma  

Science.gov (United States)

Reorganization of active fault systems may result from changes in relative plate motion and evolving fault geometries. Between ~1.5 and 1.1 Ma the southern San Andreas fault system underwent a major reorganization that included initiation of the San Jacinto fault zone, termination of slip on the extensional West Salton detachment fault, and reorganization of structures in the Mecca Hills northeast of the San Andreas fault during a local change from transtension to transpression conditions with no known change in Pacific-North America relative plate motion. The active trace of the southern San Andreas fault itself also evolved during this time, with shifts in activity from the Mission Creek to Mill Creek to the present-day active fault geometry of the San Bernardino, Garnet Hill, and Banning strands of the San Andreas fault. Although there is a rich geologic record of these changes, the mechanisms that controlled abandonment of active faults, initiation of new strands, and shifting loci of uplift are poorly understood. We use three-dimensional mechanical Boundary Element Method models to investigate this major tectonic reorganization at ~1.1-1.5 Ma. Previous mechanical modeling studies have examined the evolution of the southern San Andreas fault geometry in the San Gorgonio Pass using a series of snapshot models of the succession of active fault geometries. We use the same approach to explore the role of fault interaction and tectonic loading in abandonment of the West Salton detachment fault and initiation of the San Jacinto fault. The snapshots include: (1) regional transtension with an active West Salton detachment fault and active Mission Creek strand of the San Andreas fault; (2) cessation of local extension in combination with initiation of the San Jacinto fault in which we explore both north-to-south propagation and simultaneous growth; (3) shift of activity to the Mill Creek strand of the San Andreas fault; and (4) shift of activity to the present-day configuration of faults. We assess the mechanical viability of our snapshot series of models by comparison with patterns of uplift and subsidence inferred from the stratigraphic record in the Salton Trough and Mecca Hills. Model results of present-day fault configuration are also compared with vertical axis rotation data from paleomagnetism studies in the Mecca Hills, Borrego Badlands, and San Timoteo Badlands (see Housen et al., this session). We examine incipient faulting using maps of the strain energy density, which identifies regions of high off-fault strain. Our model results explore the importance of interaction among faults and resulting shifts in stress and strain distributions in the reorganization of the southern San Andreas system at ~1.1-1.5 Ma.

Fattaruso, L.; Cooke, M. L.; Dorsey, R. J.

2013-12-01

149

Interaction of the san jacinto and san andreas fault zones, southern california: triggered earthquake migration and coupled recurrence intervals.  

Science.gov (United States)

Two lines of evidence suggest that large earthquakes that occur on either the San Jacinto fault zone (SJFZ) or the San Andreas fault zone (SAFZ) may be triggered by large earthquakes that occur on the other. First, the great 1857 Fort Tejon earthquake in the SAFZ seems to have triggered a progressive sequence of earthquakes in the SJFZ. These earthquakes occurred at times and locations that are consistent with triggering by a strain pulse that propagated southeastward at a rate of 1.7 kilometers per year along the SJFZ after the 1857 earthquake. Second, the similarity in average recurrence intervals in the SJFZ (about 150 years) and in the Mojave segment of the SAFZ (132 years) suggests that large earthquakes in the northern SJFZ may stimulate the relatively frequent major earthquakes on the Mojave segment. Analysis of historic earthquake occurrence in the SJFZ suggests little likelihood of extended quiescence between earthquake sequences. PMID:17818388

Sanders, C O

1993-05-14

150

RheoSANS: simultaneous SANS and rheology measurements on the Quokka SANS instrument  

International Nuclear Information System (INIS)

The highly penetrative and non-ionising nature of neutrons make the SANS measurement particularly suited to examine toe response of soft materials to an external stimulus. In this case we consider the response of a complex fluid. an aqueous solution of a block co-polymer. to shear flow in a couette cell consisting of two concentric quartz cylinders with a variable gap between The couette shear cell is connected to a commercial Paar Physica MCR 500 rheometer. Depending on the ability to maintain laminar flow, rheometric tests may be performed at shear rates from 0.1 to 2000s-1 and at temperatures from -5 to 80cC. The jacket responsible for thermal control of the sample allows access of neutron beam in directions radial and tangential to the now direction. In the tangential direction the need to use a highly collimated beam to illuminate the gap provides a serious limitation to neutron flux at the sample. A trap may be used to prevent the evaporation of solvents. SANS data from the detector may be acquired in either of two modes. Acquisitions may be triggered by voltage output from rheometer (e.g shear rate), or using the detector in list mode where detector counts are post-binned to provide the optimal signal to noise for example in kinetic studies. A further possibility of the latter mode rs the study of shear induced structural changes in a steady perturbed slate such as an oscillatory smear.

151

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

152

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.

153

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

154

SanG, a transcriptional activator, controls nikkomycin biosynthesis through binding to the sanN-sanO intergenic region in Streptomyces ansochromogenes.  

Science.gov (United States)

Streptomyces ansochromogenes SanG is a pathway-specific regulator that mainly controls the transcription of two transcriptional units involved in nikkomycin biosynthesis. SanG consists of three major functional domains: an N-terminal Streptomyces antibiotic regulatory protein (SARP) domain, a central ATPase domain, and a C-terminal half homologous to guanylate cyclases belonging to the LuxR family. SanG was expressed in Escherichia coli as a C-terminally His(6)-tagged protein. The purified SanG-His( 6) was shown to be a dimer in solution by dynamic light scattering. An electrophoretic mobility-shift assay showed that the purified SanG protein could bind to the DNA fragment containing the bidirectional sanN-sanO promoter region. The SanG-binding sites within the bidirectional sanN-sanO promoter region were determined by footprinting analysis and identified a consensus-directed repeat sequence 5'-CGGCAAG-3'. SanG showed significant ATPase/GTPase activity in vitro, and addition of ATP/GTP enhanced the affinity of SanG for target DNA, but ATP/GTP hydrolysis was not essential for SanG binding to the target DNA. However, real-time reverse transcription PCR showed that mutation of the ATPase/GTPase domain of SanG significantly decreased the transcriptional level of sanN-I and sanO-V. These results indicated that the ATPase/GTPase activity of SanG modulated the transcriptional activation of SanG target genes during nikkomycin biosynthesis. PMID:19959580

He, Xihong; Li, Rui; Pan, Yuanyuan; Liu, Gang; Tan, Huarong

2010-03-01

155

33 CFR 334.1065 - U.S. Coast Guard Station, San Francisco Bay, Yerba Buena Island, San Francisco Bay, California...  

Science.gov (United States)

...2010-07-01 false U.S. Coast Guard Station, San Francisco Bay, Yerba Buena Island, San Francisco Bay, California; restricted area. 334...334.1065 U.S. Coast Guard Station, San Francisco Bay, Yerba Buena Island, San...

2010-07-01

156

The San Marco project - Prospects and programs  

Science.gov (United States)

Activities planned for the Italian equatorial space-launch facility at San Marco (on the east coast of Africa) are discussed. The advantages of the site are considered: namely that all orbits (including low equatorial and low polar orbits) can be reached economically from San Marco at all times of the year. In addition, the equatorial site is advantagenous not only for launch operations but also for data reception and the control of satellites in LEO. Particular consideration is given to the CRA-NASA San Marco D program, which envisages the launching of a satellite into multistationary orbit.

Broglio, L.

157

33 CFR 165.776 - Security Zone; Coast Guard Base San Juan, San Juan Harbor, Puerto Rico  

Science.gov (United States)

...Security Zone; Coast Guard Base San Juan, San Juan Harbor, Puerto Rico 165.776 Section 165.776 Navigation and Navigable...Security Zone; Coast Guard Base San Juan, San Juan Harbor, Puerto Rico (a) Location . The following area is a security zone: All waters...

2010-07-01

158

33 CFR 165.1102 - Security Zone; Naval Base Point Loma; San Diego Bay, San Diego, CA.  

Science.gov (United States)

...2010-07-01 false Security Zone; Naval Base Point Loma; San Diego Bay, San Diego, CA. 165.1102 Section 165.1102 Navigation...165.1102 Security Zone; Naval Base Point Loma; San Diego Bay, San Diego, CA. (a) Location....

2010-07-01

159

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

160

Calidad de Vida Relacionada con Salud Oral en Mayores de 14 Años en la Comunidad San Juan Bautista, Isla Robinson Crusoe, Chile / Quality of Life Related to Oral Health in Subjects 14 Years or Older, San Juan Bautista Community, Robinson Crusoe Island, Chile  

Scientific Electronic Library Online (English)

Full Text Available El aislamiento geográfico y condiciones medioambientales hacen a la población de Juan Fernández altamente vulnerable, siendo relevante conocer la calidad de vida relacionada con salud oral. Se realizó un estudio transversal en 137 habitantes mayores de 14 años. Se aplicó OHIP-14 para medir calidad d [...] e vida relacionada con salud oral previo consentimiento informado. El análisis estadístico fue realizado STATA 12.0. Un 51,8% es población femenina, con una edad media de 42,26 (DE 16,5). Un 91,97%, percibe que la salud oral afecta su calidad de vida, siendo levemente mayor en mujeres. Las molestias psicológicas son una manifestación en 80,29% de los encuestados. Un 75,91% percibe incomodidad por dolor en su boca, 62,77% manifiesta problemas de incapacidad psicológica. Existe mayor impacto en la calidad de vida relacionada con salud oral a medida que aumenta la edad. Por cada año de vida, el valor del OHIP-14 aumenta 0,07 (IC:95% 0,04­0,1). Los resultados obtenidos sugieren la necesidad de generar políticas públicas que consideren la salud oral desde una perspectiva integral, con énfasis en poblaciones altamente vulnerables considerando la mejora en la calidad de vida como un resultado a esperar. Abstract in english Geographic isolation and environmental conditions make the population of Robinson Crusoe Island, in the Juan Fernández archipielago highly vulnerable. It is therefore relevant to know the quality of life related to oral health (QOLRTO). In this report a cross sectional study in 137 inhabitants over [...] 14 years of age was carried out. OHIP-14 was applied to measure QOLRTO, after informed consent was obtained. Statistical analysis was made in STATA 12.0. The population is 51.8% female, mean age 42.26 (SD 16.5) being similar in both sexes. Of the subjects studied, 91.97% perceived that oral health affects their quality of life, being slightly higher in women. Psychological distress was a manifestation in 80.29% of subjects, while 75.91% perceived discomfort and mouth pain, and 62.77% reported psychological disability issues. There is a greater impact of oral health issues with increasing age. For each year of life, the value of the OHIP-14 increased 0.07 (CI 95%, 0.04 to 0.1). The results suggest that public health policies that include a comprehensive oral health perspective, with emphasis on highly vulnerable populations should be considered.

Josefina, Aubert; Sergio, Sanchéz; René, Castro; María José, Monsalves; Paulina, Castillo; Patricia, Moya.

2014-04-01

161

Performance of BATAN-SANS instrument  

Energy Technology Data Exchange (ETDEWEB)

SANS data from some standard samples have been obtained using BATAN-SANS instrument in Serpong. The experiments were performed for various experimental set-ups that involve different detector positions and collimator lengths. This paper describes the BATAN-SANS instrument briefly as well as the data taken from those experiments and followed with discussion of the results concerning the performance and calibration of the instrument. The standard samples utilized in these experiments include porous silica, polystyrene-poly isoprene, silver behenate, poly ball and polystyrene-poly (ethylene-alt-propylene). Even though the results show that BATAN-SANS instrument is in good shape, but rooms for improvements are still widely open especially for the velocity selector and its control system. (author)

Ikram, Abarrul; Insani, Andon [National Nuclear Energy Agency, P and D Centre for Materials Science and Technology, Serpong (Indonesia)

2003-03-01

162

A Community Stormwater Investigation, San Francisco, CA  

Science.gov (United States)

The San Francisco Bay watershed covers 40% of the State of California. Nonpoint source pollutants from cars, lawns, houses, parks and people residing within the watershed contribute contamination into San Francisco Bay. To measure the contribution from our neighborhoods we collected runoff from storm-drains at 10 different sites around San Francisco and tested them for heavy metals, Total Organic Carbons (TOC), and Methylene Blue Active Substances (MBAS) during a six-month period. Each sample site location is situated within one block of each participant's home. The goal of this study was to determine the contaminants contributed as nonpoint source pollution into San Francisco Bay. Our results show that a variety of contaminants are entering the Bay's ecosystem via sources in our residential settings. While this contribution may be thought of as unsubstantial, our results show that our neighborhoods are significant sources of watershed pollution.

Chio, J.; Garcia, E.; Hernandez, M.; Devine, M.; Isip, N.; Jiang, J.; Li, A.; Li, D.; Lopez, J.; Mark, J.; McGuire, S.; Navarro, K.; Negrete, R.; Orellana, S.; Yun, C.; Bissell, M.; Neiss, J.

2008-12-01

163

Radon emanation on San Andreas Fault  

International Nuclear Information System (INIS)

It is stated that subsurface radon emanation monitored in shallow dry holes along an active segment of the San Andreas fault in central California shows spatially coherent large temporal variations that seem to be correlated with local seismicity. (author)

164

Surviving the Present: San Francisco Public Library.  

Science.gov (United States)

Discusses the services of the San Francisco Public Library with respect to the effects of Proposition 13 and inflation, and describes the roles of the Main Library, the Business Branch, the Chinatown Branch, and the Communications Center. (CHC)

Bourne, Tom

1981-01-01

165

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

166

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

167

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

168

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

169

Southern San Andreas-San Jacinto fault system slip rates estimated from earthquake cycle models constrained by GPS and interferometric synthetic aperture radar observations  

Science.gov (United States)

We use ground geodetic and interferometric synthetic aperture radar satellite observations across the southern San Andreas (SAF)-San Jacinto (SJF) fault systems to constrain their slip rates and the viscosity structure of the lower crust and upper mantle on the basis of periodic earthquake cycle, Maxwell viscoelastic, finite element models. Key questions for this system are the SAF and SJF slip rates, the slip partitioning between the two main branches of the SJF, and the dip of the SAF. The best-fitting models generally have a high-viscosity lower crust (? = 1021 Pa s) overlying a lower-viscosity upper mantle (? = 1019 Pa s). We find considerable trade-offs between the relative time into the current earthquake cycle of the San Jacinto fault and the upper mantle viscosity. With reasonable assumptions for the relative time in the earthquake cycle, the partition of slip is fairly robust at around 24-26 mm/a for the San Jacinto fault system and 16-18 mm/a for the San Andreas fault. Models for two subprofiles across the SAF-SJF systems suggest that slip may transfer from the western (Coyote Creek) branch to the eastern (Clark-Superstition hills) branch of the SJF from NW to SE. Across the entire system our best-fitting model gives slip rates of 2 ± 3, 12 ± 9, 12 ± 9, and 17 ± 3 mm/a for the Elsinore, Coyote Creek, Clark, and San Andreas faults, respectively, where the large uncertainties in the slip rates for the SJF branches reflect the large uncertainty in the slip rate partitioning within the SJF system.

Lundgren, Paul; Hetland, Eric A.; Liu, Zhen; Fielding, Eric J.

2009-02-01

170

Abrupt along-strike change in tectonic style: San Andreas fault zone, San Francisco Peninsula  

Science.gov (United States)

Seismicity and high-resolution aeromagnetic data are used to define an abrupt change from compressional to extensional tectonism within a 10- to 15-km-wide zone along the San Andreas fault on the San Francisco Peninsula and offshore from the Golden Gate. This 100-km-long section of the San Andreas fault includes the hypocenter of the Mw = 7.8 1906 San Francisco earthquake as well as the highest level of persistent microseismicity along that ???470-km-long rupture. We define two distinct zones of deformation along this stretch of the fault using well-constrained relocations of all post-1969 earthquakes based a joint one-dimensional velocity/hypocenter inversion and a redetermination of focal mechanisms. The southern zone is characterized by thrust- and reverse-faulting focal mechanisms with NE trending P axes that indicate "fault-normal" compression in 7- to 10-km-wide zones of deformation on both sides of the San Andreas fault. A 1- to 2-km-wide vertical zone beneath the surface trace of the San Andreas is characterized by its almost complete lack of seismicity. The compressional deformation is consistent with the young, high topography of the Santa Cruz Mountains/Coast Ranges as the San Andreas fault makes a broad restraining left bend (???10??) through the southernmost peninsula. A zone of seismic quiescence ???15 km long separates this compressional zone to the south from a zone of combined normal-faulting and strike-slip-faulting focal mechanisms (including a ML = 5.3 earthquake in 1957) on the northernmost peninsula and offshore on the Golden Gate platform. Both linear pseudo-gravity gradients, calculated from the aeromagnetic data, and seismic reflection data indicate that the San Andreas fault makes an abrupt ???3-km right step less than 5 km offshore in this northern zone. A similar right-stepping (dilatational) geometry is also observed for the subparallel San Gregorio fault offshore. Persistent seismicity and extensional tectonism occur within the San Andreas right stepover region and at least 15 km along-strike both to the SE and NW. The 1906 San Francisco earthquake may have nucleated within the San Andreas right stepover, which may help explain the bilateral nature of rupture of this event. Our analysis suggests two seismic hazards for the San Francisco Peninsula in addition to the hazard associated with a M = 7 to 8 strike-slip earthquake along the San Andreas fault: the potential for a M ??? 6 normal-faulting earthquake just 5-8 km west of San Francisco and a M = 6+ thrust faulting event in the southern peninsula.

Zoback, M.L.; Jachens, R.C.; Olson, J.A.

1999-01-01

171

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)

172

municipios Maracaibo y San Francisco  

Directory of Open Access Journals (Sweden)

Full Text Available El estudio de las Organizaciones No Gubernamentales estuvo dirigido a caracterizar la diversidad de grupos y asociaciones que bajo el termino genérico de ONG?s existen en los municipios Maracaibo y San Francisco, los más poblados y relevantes en la vida política, económica, social y cultural del estado Zulia-Venezuela. Se planteó una investigación exploratoria y descriptiva. El resultado permitió reconocer a Existe un crecimiento sostenido de las ONG en estos municipios: b los sectores con mayor concentración son el de salud; educación; deporte y recreación; arte y cultura. c Las instituciones que promueven más organizaciones son la iglesia y el Estado, lo que supone es este último caso una reducción de las funciones que le corresponden, además de la minimización de costos y conflictos laborales. d Ambivalencia en la orientación de su funcionamiento: Algunas ONG?s implementan prácticas próximas a la mercantilización de los servicios con lo cual legitiman estrategias del modelo económico neoliberal mientras otras contribuyen a fortalecer la democratización de los servicios públicos. Se concluye que el crecimiento y características de las ONGs en estos municipios estuvo vinculado en los noventa y comienzos de la década de 2000 por la aplicación de las políticas públicas neoliberales.

Rosa E. Ortiz

2005-01-01

173

77 FR 42638 - Safety Zone: Sea World San Diego Fireworks, Mission Bay; San Diego, CA  

Science.gov (United States)

...1625-AA00 Safety Zone: Sea World San Diego Fireworks, Mission...Mission Bay in support of the Sea World San Diego Fireworks. This safety...Proposed Rulemaking A. Regulatory History and Information The Coast Guard...B. Basis and Purpose Sea World is sponsoring the Sea...

2012-07-20

174

78 FR 10062 - Safety Zone; Sea World San Diego Fireworks, Mission Bay; San Diego, CA  

Science.gov (United States)

...1625-AA00 Safety Zone; Sea World San Diego Fireworks, Mission...Mission Bay in support of the Sea World San Diego Fireworks. This safety...Proposed Rulemaking A. Regulatory History and Information The Coast Guard...sections 1221 et seq.). Sea World is sponsoring the Sea...

2013-02-13

175

77 FR 60899 - Safety Zone; Sea World San Diego Fireworks, Mission Bay; San Diego, CA  

Science.gov (United States)

...1625-AA00 Safety Zone; Sea World San Diego Fireworks, Mission...Mission Bay in support of the Sea World San Diego Fireworks. This safety...Proposed Rulemaking A. Regulatory History and Information The Coast Guard...S.C 1221 et seq.). Sea World is sponsoring the Sea...

2012-10-05

176

Nature and Culture in the Rituals of San Antonio  

Directory of Open Access Journals (Sweden)

Full Text Available In this paper I analyze the cult of San Antonio Abad, San Antón, as an example of the ritual fusion of nature and culture in the different communities commemorating this Saint. The festive practices of this «old Saint» are associated to preChristian rites related to fire and the protection of animals. The cult to this Saint was very pread out in Europe, and was even exported to the American colonies. It is a clear example of how popular practices appropriate Church initiatives within their own logic, bordering heterodoxy at times, while expressing mechanisms of resistance to change. Yet it is clear that this cult has survived because it has adapted. When industrialization came to the countryside, the animal blessing gave way to machine blessing. When stockbreeding is on the wane, the cult adjusts to new ecological sensibilities and the blessings go to pets. St. Antonio unifies nature and culture, rural and urban, remote cults with ecology.

En este artículo reflexiono en torno al culto de San Antonio Abad o San Antón como una muestra de la fusión naturaleza y cultura a través de los ritos que llevan a cabo las distintas poblaciones que festejan a este santo. Las prácticas festivas de este “santo viejo” están asociadas a prácticas precristianas relacionadas con el culto al fuego y la protección de los animales. El culto de este santo popular estuvo muy extendido por Europa y fue exportado a las colonias americanas. Sirve como expresión muy clara de cómo las apropiaciones populares se han producido una y otra vez estimuladas por iniciativas eclesiásticas y se han desarrollado según los modos propios las prácticas propuestas, rozando en ocasiones la heterodoxia y expresando mecanismos de resistencia al cambio. Aunque por otra parte este culto se ha mantenido gracias a que se ha adaptado; el campo se industrializó y dejó de celebrarse la bendición de animales para pasar a bendecir las máquinas. Cuando prácticamente se ha abandonado la explotación ganadera, el culto se adapta a la nueva sensibilidad ecológica y se bendicen las mascotas. San Antonio concilia naturaleza y cultura, lo rural con lo urbano, los cultos remotos con la nueva ecología.

Velasco Maíllo, Honorio M.

2009-06-01

177

Geology map of the San Emidio, Nevada geothermal area  

Energy Technology Data Exchange (ETDEWEB)

Since mid-Tertiary time, the rocks on the eastern edge of the San Emidio Desert have undergone extensive hydrothermal alteration. The most recent alteration has produced intense acid leaching and small native sulphur deposits along a steeply dipping range front fault. These deposits reflect the continued evolution of hydrogen sulfide from near-surface thermal fluids related to a presently active hydrothermal system. The absence of recent igneous activity, the close association between the thermal fluids and range front faults, and the limited distribution of active thermal features suggest that the thermal fluids represent deep circulation of meteoric water.

Moore, J.N.

1979-12-01

178

Periodic pulsing of characteristic microearthquakes on the San Andreas fault.  

Science.gov (United States)

Deep fault slip information from characteristically repeating microearthquakes reveals previously unrecognized patterns of extensive, large-amplitude, long-duration, quasiperiodic repetition of aseismic events along much of a 175-kilometer segment of the central San Andreas fault. Pulsing occurs both in conjunction with and independent of transient slip from larger earthquakes. It extends to depths of approximately 10 to 11 kilometers but may be deeper, and it may be related to similar phenomena occurring in subduction zones. Over much of the study area, pulse onset periods also show a higher probability of larger earthquakes, which may provide useful information for earthquake forecasting. PMID:14716011

Nadeau, Robert M; McEvilly, Thomas V

2004-01-01

179

Seismic techniques in uranium exploration - San Juan Basin, New Mexico  

International Nuclear Information System (INIS)

The 5.5 mile-long segment of a seismic line illustrated in the report is part of a seismic survey near Crownpoint, New Mexico. It may be used as a reference line for future uranium-related seismic studies, as it crosses two uranium orebodies and is in an area that has been extensively drilled and studied. It also demonstrates the seismic character of the uranium-bearing Upper Jurassic Morrison Formation in the southern San Juan Basin. Seismic techniques may be used to locate the drilling targets and thus provide a more efficient means for uranium exploration. Geology, seismic interpretation and acquisition are discussed. 14 references, 7 figures

180

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)

181

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

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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

182

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)

183

A Community College in the North San Fernando Valley. A Feasibility Study.  

Science.gov (United States)

A feasibility study conducted to examine the proposition of a new community college in the North San Fernando Valley is reported. Following a summary, recommendations, and introduction, findings are discussed as related to the following: Demography, Questionnaire Results, Advisory Committees, Community Participation, Current Enrollment,…

Los Angeles Community Coll. District, CA.

184

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.

185

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

186

77 FR 66910 - Environmental Impact Statement, San Diego County, California  

Science.gov (United States)

...Transportation Engineer/Border Engineer, Federal Highway Administration...Street, Suite 800, San Diego, CA 92101, Regular...Senior Transportation Engineer/Border Engineer, Federal Highway Administration, San Diego, California....

2012-11-07

187

33 CFR 110.90 - San Diego Harbor, Calif.  

Science.gov (United States)

...OF HOMELAND SECURITY ANCHORAGES ANCHORAGE REGULATIONS Special Anchorage Areas § 110.90 San Diego Harbor, Calif. (a) Area A-1. In North San Diego Bay, the Shelter Island Yacht Basin Anchorage, the water area enclosed by a line...

2010-07-01

188

DARI KYUUSHUU KE RAN’IN: KARAYUKI-SAN DAN PROSTITUSI JEPANG DI INDONESIA (1885-1920  

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Full Text Available Karayuki-san is a term referring to Japanese women who worked as prostitutes abroad from the Meiji Period (1868-1912 to the World War II. This study investigates the various conditions that encourage Japanese women to be karayuki-san, to understand the kinds of exploitations that the karayuki-san experienced during their journey to Indonesia and worked as prostitutes in some cities in Indonesia. The main data sources for this research are some diplomatic records (confidential and disclosed obtained from the Japanese Consulate in Singapore and Batavia from Meiji 28 (1895 to Taisho 4 (1915, Dutch Colonial Governments Regulations related to Japanese migrants, particularly those collected in the Missive Gouvernements Secretaris (Mgs, and dialog records between Yamazaki Tomoko and the ex-karayuki-san that were recorded in Sandakan Hachiban Shookan (Sandakan No.8 Brothel.

Sri Pangastoeti

2009-06-01

189

Non-linear vibrations of cracked structures: application to turbine rotors; Vibrations non-lineaires des structures fissurees: application aux rotors de turbines  

Energy Technology Data Exchange (ETDEWEB)

The aim of this work is to study the dynamic response of a cracked rotor to establish some possibilities for early on line crack detection. First, a review on experimental, numerical and analytical works on the dynamics of cracked rotors is given. Then, an original method of calculating the behavior of a cracked beam section in bending with shearing effects is presented. The nonlinear behavior relations are derived from a three-dimensional model taking into account the unilateral contact conditions on the crack's lips. Based on an energy formulation, this method could be applied to any geometry of crack. The exploration by different numerical integration methods of the vibratory response of some models of cracked rotors is presented in the third chapter of this thesis. The un-cracked parts of a rotor are represented by elements of bar or beam type, and the cracked section by a nonlinear spring taking into account the breathing mechanism of the cracks. At the end of this part, an original method of construction of a finite element of a cracked beam is presented. The final chapter is devoted to the analytical study of the system with 2 degrees of freedom. The breathing mechanism of the crack is taken into account by considering specific periodic variation of the global stiffness of the system. The differential equations system is solved using the harmonic balance method. The linear stability of the periodic solutions is studied by the Floquet theory. Some vibratory parameters are proposed as crack indicators. (author)

El Arem, S.

2006-01-15

190

New IP SAN Era in Cluster Mirroring  

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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

191

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

192

San Marcos Astronomical Project and Doctoral Prospectus  

Science.gov (United States)

The Universidad Nacional Mayor de San Marcos, UNMSM, in Lima, Perú, is the only Peruvian institution working for the peruvian astronomical development as a career since 1970. We are conforming a network with international friend astronomers to invite them as Visiting Lectures to assure the academic level for the future doctoral studies in the UNMSM. The Chancellor of UNMSM has decided that the Astronomical Project is a UNMSM Project, to encourage and advance in this scientific and strategical area, to impulse the modernity of Peru, the major effort will be the building of the San Marcos Astronomical Observatory, with a telescope of 1 meter aperture.

Aguilar, M. L.

2009-05-01

193

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.

194

SANS studies of liquid crystalline microemulsion gels  

Science.gov (United States)

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 surface (IPMS) with cubic symmetry. We have, in addition, studied the “ringing” gel phases of the system water/octane/didodecyldimethylammonium bromide by SANS and electron microscopy.

Rädler, J. O.; Radiman, S.; De Vallera, A.; Toprakcioglu, C.

1989-01-01

195

78 FR 13890 - Notice of Intent To Repatriate Cultural Items: San Francisco State University NAGPRA Program, San...  

Science.gov (United States)

...at the address below by April 1, 2013. ADDRESSES: Jeffrey Boland Fentress, San Francisco State University NAGPRA Program, c...or the objects of cultural patrimony should contact Jeffrey Boland Fentress, San Francisco State University NAGPRA Program,...

2013-03-01

196

77 FR 28895 - Don Edwards San Francisco Bay National Wildlife Refuge, Alameda, Santa Clara, and San Mateo...  

Science.gov (United States)

...Edwards San Francisco Bay National Wildlife Refuge, Alameda, Santa Clara...Edwards San Francisco Bay National Wildlife Refuge for public review and comment...EA, prepared under the National Wildlife Refuge System Improvement Act...

2012-05-16

197

33 CFR 165.1107 - San Diego Bay, California.  

Science.gov (United States)

...2010-07-01 false San Diego Bay, California. 165.1107 Section 165.1107...District § 165.1107 San Diego Bay, California. (a) Location. The area encompassed...Base on Ballast Point, San Diego Bay, California, mariners transiting within...

2010-07-01

198

SANS measurements of deuteride (hydride) formation in single crystal Pd  

International Nuclear Information System (INIS)

In situ small-angle neutron scattering (SANS) measurements of deuteride precipitation in well-annealed, undeformed single crystal Pd have been performed at room temperature to observe the morphology of the precipitate as the deuterium fraction was increased over a range of 0.005 to 0.097 [D]/[Pd]. Supporting measurements were made of the room temperature deuterium solubility isotherm in the single crystal material and of the progressive lattice mosaic broadening by gamma-ray diffraction analysis. The use of single crystal material eliminated the effect of grain boundaries on the precipitation process and allowed the orientation of the deuteride precipitates relative to the host Pd lattice to be established. The SANS data for deuterium loading beyond the solid solution phase are dominated by a d?/d??Q-2 scattering response well fit by a model cross section of small plate-like precipitates with a thickness of 25-30 A. This response showed little indication of a preferred habit plane and the plate thickness was independent of the total deuterium loading. The volume fraction of these small plates grew uniformly with increased deuterium loading, but was surprisingly small, reaching only 8 x 10-5 at 0.060 [D]/[Pd]. This means that almost all of the deuterium resides in some other precipitate structure. The SANS data in the lowest Q region showed a second, anisotropic scattering component that can be interpreted as the Porod tail from plate-like par as the Porod tail from plate-like particles of grossly larger dimensions. (orig.)

199

Particulate Matter Concentrations in the San Francisco Bay Area, California  

Science.gov (United States)

Particulate pollution is a serious problem that is estimated to cause between 20,000 and 50,000 deaths per year in the US alone. Particulate matter 2.5 micrometers diameter or less is small enough to pass from the lungs to the blood stream, and in the long run, may contribute to causing cancer and other life-threatening diseases. Although particles as large as 10 micrometers tend to get trapped by the nose and throat, and thus never enter the lungs, they can still cause trouble for those who have breathing-related problems. Our research was aimed at determining the levels of large and small particles in places with high densities of people, as well as locations with a high volume of vehicle traffic. Using the Fluke 893 Particle Counter, we measured particulate matter in a transect that spanned the San Francisco Bay Area. We collected data at diverse sites including: Bay Area Rapid Transit (BART) stations in Oakland and San Francisco; all levels of a large parking garage in Emeryville; a number of local construction sites; and several heavily populated shopping areas in San Francisco. Though preliminary in nature, analysis of our data indicates that high concentrations of particles under 2.5 micrometers are found at the Coliseum BART station in Oakland, as well as in association with areas of high vehicle traffic flow. High concentrations of large particles are found near construction sites. Guided by these preliminary results, we plan to continue collecting data throughout the Fall to determine the causes of patterns that we have observed, as well as assess any changes that occur over time.

Souksavath, V.; Williams, J.; Powell, M.; Campell, M.; Almarez, A.; Almarez, M.

2008-12-01

200

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

201

The San Andreas Fault System, California  

Science.gov (United States)

Maps of northern and southern California printed on flyleaf inside front cover and on adjacent pages show faults that have had displacement within the past 2 million years. Those that have had displacement within historical time are shown in red. Bands of red tint emphasize zones of historical displacement; bands of orange tint emphasize major faults that have had Quaternary displacement before historical time. Faults are dashed where uncertain, dotted where covered by sedimentary deposits, and queried where doubtful. Arrows indicate direction of relative movement; sawteeth on upper plate of thrust fault. These maps are reproductions, in major part, of selected plates from the 'Fault Map of California,' published in 1975 by the California Division of Mines and Geology at a scale of 1:750,000; the State map was compiled and data interpreted by Charles W. Jennings. New data about faults, not shown on the 1975 edition, required modest revisions, primarily additions; however, most of the map was left unchanged because the California Division of Mines and Geology is currently engaged in a major revision and update of the 1975 edition. Because of the reduced scale here, names of faults and places were redrafted or omitted. Faults added to the reduced map are not as precise as on the original State map, and the editor of this volume selected certain faults and omitted others. Principal regions for which new information was added are the region north of the San Francisco Bay area and the offshore regions. Many people have contributed to the present map, but the editor is solely responsible for any errors and omissions. Among those contributing informally, but extensively, and the regions to which each contributed were G.A. Carver, onland region north of lat 40? N.; S.H. Clarke, offshore region north of Cape Mendocino; R.J. McLaughlin, onland region between lat 40?00' and 40?30' N. and long 123?30' and 124?30' W.; D.S. McCulloch, offshore region between lat 35? and 40? N.; J.G. Vedder, offshore region south of lat 35? N.; and D.G. Herd, southern San Francisco Bay region. The Fault Evaluation Program of the California Division of Mines and Geology, under the direction of E.W. Hart, provided much data about many faults. Unpublished material about the Bartlett Springs fault zone that was gathered by Geomatrix Consultants for the Pacific Gas and Electric Co. was very useful. In addition, selected publications that provided invaluable data include Bortugno (1982), Herd (1977), Herd and Helley (1977), Pampeyain and others (1981), and Yerkes and others (1980). Full references for these publications are listed at the end of chapter 2. To all of the above, and to numerous others, the editor expresses his great appreciation.

Wallace, Robert E., (Edited By)

1990-01-01

202

75 FR 17329 - Safety Zone; Big Bay Fourth of July Fireworks, San Diego Bay, San Diego, CA  

Science.gov (United States)

...1625-AA00 Safety Zone; Big Bay Fourth of July Fireworks, San Diego Bay, San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Notice...temporary safety zone on the navigable waters of the San Diego Bay in support of the Big Bay July Fourth...

2010-04-06

203

77 FR 34984 - Notice of Intent To Repatriate a Cultural Item: San Diego Museum of Man, San Diego, CA  

Science.gov (United States)

...Diego Museum of Man, San Diego, CA, that meets the definition...transferred the clay pipe to the San Diego Museum of Man, where he...California occupied the area where the pipe was discovered...Determinations Made by the San Diego Museum of Man...

2012-06-12

204

Groundwater quality in the San Fernando--San Gabriel groundwater basins, California  

Science.gov (United States)

Groundwater provides more than 40 percent of California's drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project of the GAMA Program provides a comprehensive assessment of the State's groundwater quality and increases public access to groundwater-quality information. The San Fernando and San Gabriel groundwater basins constitute one of the study units being evaluated.

Kulongoski, Justin T.; Belitz, Kenneth

2012-01-01

205

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

206

Are Fibre Channel SANs a Commodity?  

Science.gov (United States)

The goal of this work is to evaluate the feasibility of putting together a Fibre Channel Storage Area Network with heterogeneous hardware running both open-source and commercial operating systems. Adherence to the Fibre Channel Specification is supposed to guarantee interoperability in such an environment. We also want to evaluate how difficult it might be to put together a SAN using open-source components. While all the commercial vendors provide Fibre Channel support, this comes at a cost, e.g., not only O/S and drivers, but usually an expensive support contract. The open-source model could lower the cost of building and maintaining a SAN. Of course, for this to be the case, the open-source platforms would have to provide the functionality to construct a SAN. We are assembling a Fibre Channel SAN from heterogeneous hardware (i386, alpha, sparc) running *BSD, Linux, Tru64, NT and Solaris operating systems. We are running several tests to investigate the level of Fibre Channel support provided by each OS. Our current testbed is specified in the table below. Currently, it only contains open-source platforms. We plan to add a PC running OpenBSD, as well as the following commercial systems: Sun Ultra 1/Solaris, DEC AlphaServer 4000/Tru64 Unix, Pentium Pro PC/Windows NT.

Becker, Jeff; Jacob, Matt; Biegel, Bryan A. (Technical Monitor)

2000-01-01

207

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

208

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...

209

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...

210

SANS analysis of aqueous ionic perfluoropolyether micelles  

International Nuclear Information System (INIS)

Preliminary SANS results of ionic chlorine terminated perfluoropolyether micelles in water are given. The experimental spectra have been analyzed by a two-shell ellipsoidal model for the micellar form factor and a screened Coulombic plus hard-sphere repulsion potential for the structure factor. (orig.)

211

SANS analysis of aqueous ionic perfluoropolyether micelles  

CERN Document Server

Preliminary SANS results of ionic chlorine terminated perfluoropolyether micelles in water are given. The experimental spectra have been analyzed by a two-shell ellipsoidal model for the micellar form factor and a screened Coulombic plus hard-sphere repulsion potential for the structure factor. (orig.)

Gambi, C M C; Chittofrati, A; Pieri, R; Baglioni, P; Teixeira, J

2002-01-01

212

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.

213

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

214

Mobile Media at San Francisco Medical Center.  

Science.gov (United States)

In 1966 the University of California Medical Center at San Francisco (including Schools of Dentistry, Medicine, Nursing, and Pharmacy) established a broadly based communications media center designed to serve the variety of teaching, research, and continuing education requirements of the faculty. This article dwells on the variety of applications…

Banks, Thomas L.

1968-01-01

215

San Francisco, California: Solar in Action (Brochure)  

Energy Technology Data Exchange (ETDEWEB)

This brochure provides an overview of the challenges and successes of San Francisco, CA, a 2007 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

216

Geochemical and Isotopic Estimates of Eolian Dust in Soils of the San Juan Mountains, USA.  

Science.gov (United States)

Eolian dust deposition in the San Juan Mountain Range in southern Colorado has increased 5-7 fold in the past two centuries. This dust deposition contributes an exogenous supply of biologically relevant elements such as Ca, K, Mg, and P to these alpine ecosystems in the form of fine textured mineral particulates. The deposition of eolian dust may be an underestimated factor of soil formation and soil chemistry in these alpine settings. The importance of eolian dust relative to the weathering of local bedrock likely varies across bedrock types. The San Juan Range is geologically diverse with distinct regions of Meso-proterozic crystalline granites in the Weminuche Wilderness, Mesozoic sedimentary layers near Molas Pass in the San Juan National Forest, and Tertiary volcanic geology found on Red Mountain Pass in the Uncompahgre National Forest. Principle component analysis of element chemistry shows that bedrock and soils from these sites cluster by geology. In addition, these groups are chemically distinct from eolian dust collected from snow in the San Juan Range. Several elements seem to drive the difference of dust from soils and bedrock including Ca, Sr, Cu and Cd. The purpose of this research was to estimate the relative contribution of eolian dust to alpine soil element pools in the San Juan Mountains across a range of local geologic parent material. A calculation of element mass- balance shows that Cu and Cd are enriched in the surface soils of both volcanic and sedimentary soils relative to concentrations in local bedrock. However, Ca is enriched only in volcanic soils. These observations support the notion that eolian dust contributes to soil formation and that the relative contribution of dust across the landscape varies with geology. In addition to element mass-balance estimates we utilize Sr and Nd isotope measurements of soil, bedrock, and dust to further constrain the importance of eolian dust to these alpine soils.

Lawrence, C. R.; Neff, J. C.; Farmer, L.; Painter, T. H.; Landry, C.

2007-12-01

217

SAN virtualization study and implementation based on FC switches  

Science.gov (United States)

Currently the mainstream technology of SAN is SAN storage virtualization and its implementation. The switch-based storage virtualization embeds the virtualizer in the core of the storage networking fabric in an "intelligent switch" rather than an appliance or a host. This paper describes the SV-FC SAN switch's hardware and software architecture. The main aid of design and implementation the switch is to give a new way to realize FC-SAN storage virtualization. Storage virtualization modules are embedded in the switches firmware. The switch can provide simple and friendly interfaces for users to configure and manage the FC SAN.

Yang, Yi; Cao, Mingcui; Luo, Zhixiang

2005-11-01

218

University of California, San Francisco: Drug Industry Document Archive  

Science.gov (United States)

This archive is one that will be of particular importance to those with an interest in public health, public policy, and the general activities of pharmaceutical companies. The Drug Industry Document Archive (DIDA) was created by the University of California, San Francisco (UCSF) and it contains over 1500 documents related to pharmaceutical industry clinical trials, publication of study results, pricing, marketing, and relations with physicians. Many of these documents were previously secret, and were only made public as a result of lawsuits filed against a number of prominent pharmaceutical companies. First-time visitors may wish to start by clicking on "The Documents" link on the homepage. Here they can read about some of the crucial lawsuits that generated the documents featured in this archive.

219

33 CFR 165.1182 - Safety/Security Zone: San Francisco Bay, San Pablo Bay, Carquinez Strait, and Suisun Bay, CA.  

Science.gov (United States)

... Safety/Security Zone: San Francisco Bay, San Pablo Bay, Carquinez Strait...transit from a line drawn between San Francisco Main Ship Channel buoys 7 and 8 (LLNR...Weapons Support Facility Seal Beach Detachment Concord on Suisun...

2010-07-01

220

Benthic lead fluxes in San Francisco Bay, California, USA  

Science.gov (United States)

Porewater concentration gradients indicate relatively large benthic fluxes of Pb from sediments in the San Francisco Bay estuary. Gradients in total dissolved (bay. Corresponding Fickian diffusive fluxes range from 2.6 × 10 -9 moles m -2 d -1 to 3.1 × 10 -8 moles m -2 d -2 in anoxic surface (Bay (3-31 moles d -1) is at least an order of magnitude greater than the fluvial input of dissolved Pb to the estuary (0.2 moles d -1) during low flow periods. Moreover, estimates of the total benthic Pb flux, which were based on HAMMOND et al. (1985) irrigation benthic flux model, are two- to six-fold greater (6-186 moles d -1) than the estimates of diffusive fluxes. Therefore, the total benthic flux of Pb from the bay's sediments may be within an order of magnitude of the total anthropogenic flux of Pb to the San Francisco Bay estuary (965-8,410 moles d -1).

Rivera-Duarte, Ignacio; Flegal, A. Russell

1994-08-01

221

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

222

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

223

Under- and Over-Nutrition Among Refugees in San Diego County, California  

OpenAIRE

Resettled refugees often arrive in their host country with little knowledge of nutrition or available food choices. We explored nutrition-related issues of recent refugee arrivals to San Diego County—the second largest California resettlement site. In-depth interviews (n = 40) were conducted with refugees, health care practitioners, and refugee service organizations. Content analysis identified nutrition-related themes. Unhealthy weight gain after arrival was the most common concern and w...

Rondinelli, Amanda J.; Morris, Meghan D.; Rodwell, Timothy C.; Moser, Kathleen S.; Paida, Paulino; Popper, Steve T.; Brouwer, Kimberly C.

2010-01-01

224

Late Glacial and Holocene Record of Hydroclimate in the San Luis Valley, Southern Colorado, USA  

Science.gov (United States)

Lake sediments from the San Luis Valley, south-central Colorado, archive a detailed record of Late Glacial and Holocene climatic fluctuations in the southern Rocky Mountains. Together with radiometric dating analysis, measurements of grain size, magnetic susceptibility, total inorganic carbon (TIC), oxygen and carbon isotopic composition of the TIC fraction on sediment samples from San Luis Lake (at an average resolution of 60 years per sample) allow us to generate a sediment record of climatic change in the region spanning the last 16ka (1 ka=1000 cal yrs). This record documents the timing and duration of major climate episodes and trends, comparable to the existing paleoclimate records from the American Southwest. The Late Glacial record of San Luis Lake contains a big wet episode in the late part of the Mystery Interval (MI), a relatively dry climate during Bølling-Allerød (B/A) warm interval, and a relatively wet episode during the Younger Dryas (YD) interval, similar to the lake-level record found in the Estancia basin in central New Mexico. The early to middle Holocene record of d18O in the San Luis Lake parallels the calcite d18O record of Bison Lake in northern Colorado, documenting a history of significant change in precipitation seasonality across the northern boundary of the North American monsoon (NAM). The middle Holocene epoch is characterized by greater variations in magnetic susceptibility, d18O and d13C, suggesting the prevalence of wet, variable or transitional climate conditions. In contrast, the late Holocene climate is relatively dry, as indicated by more positive values of d18O in San Luis Lake. The results of this study reveal a complex history of climate evolution due to the interactions of two seasonally distinct precipitation regimes with mountainous landforms in the region.

Yuan, F.; Koran, M.

2012-12-01

225

Dipping San Andreas and Hayward faults revealed beneath San Francisco Bay, California  

Science.gov (United States)

The San Francisco Bay area is crossed by several right-lateral strike-slip faults of the San Andreas fault zone. Fault-plane reflections reveal that two of these faults, the San Andreas and Hayward, dip toward each other below seismogenic depths at 60?? and 70??, respectively, and persist to the base of the crust. Previously, a horizontal detachment linking the two faults in the lower crust beneath San Francisco Bay was proposed. The only near-vertical-incidence reflection data available prior to the most recent experiment in 1997 were recorded parallel to the major fault structures. When the new reflection data recorded orthogonal to the faults are compared with the older data, the highest, amplitude reflections show clear variations in moveout with recording azimuth. In addition, reflection times consistently increase with distance from the faults. If the reflectors were horizontal, reflection moveout would be independent of azimuth, and reflection times would be independent of distance from the faults. The best-fit solution from three-dimensional traveltime modeling is a pair of high-angle dipping surfaces. The close correspondence of these dipping structures with the San Andreas and Hayward faults leads us to conclude that they are the faults beneath seismogenic depths. If the faults retain their observed dips, they would converge into a single zone in the upper mantle -45 km beneath the surface, although we can only observe them in the crust.

Parsons, T.; Hart, P.E.

1999-01-01

226

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)

227

Carte du Ciel, San Fernando zone  

Science.gov (United States)

An updated summary of a future large astrometric catalogue is presented, based on the two most important astrometric projects carried out by the Real Instituto y Observatorio de la Armada de San Fernando (ROA). The goal is to make a catalogue of positions and proper motions based on ROA's Cart du Ciel (CdC) and the Astrographic Catalogue (AC) San Fernando zone plates, and the HAMC2 meridian circle catalogue. The CdC and AC plates are being reduced together to provide first-epoch positions while HAMC2 will provide second-epoch ones. New techniques have been applied, that range from using a commercial flatbed scanner to the proper reduction schemes to avoid systematics from it. Only thirty plates (out of 540) remain to be processed, due to scanning problems that are being solved.

Abad, C.

2014-06-01

228

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

229

Discovery Along the San Andreas Fault: Relocating Photographs From the 1906 Earthquake in San Francisco and San Mateo Counties  

Science.gov (United States)

April of 2006 will mark the 100-year anniversary of the great 1906 San Francisco earthquake. This earthquake was important not only because of its human tragedy (thousands of dead or homeless people), but also because of its scientific significance. The 8.3 magnitude earthquake ruptured 430 km of the northern San Andreas fault (SAF) and lasted nearly one minute. Investigations after the earthquake led to discoveries that were the beginning of modern earthquake theories and measuring instruments. This was also one of the first large-scale natural disasters to be photographed. Our research group, which is part of the National Science Foundation funded SF-ROCKS program, acquired photographs that were taken shortly after the earthquake in downtown San Francisco and along the SAF in San Mateo County. The SAF photos are part of a Geographical Information System (GIS) database being published on a U.S. Geological Survey web site. The goal of our project was to improve estimates of photograph locations and to compare the landscape features that were visible after the earthquake with the landscape that we see today. We used the GIS database to find initial photo locations, and we then used a high-precision Global Positioning System (GPS) to measure the geographic coordinates of the locations once we matched our view to what we saw in a photo. Where possible, we used a digital camera to retake photos from the same position, to show the difference in the landscape 100 years later. The 1906 photos show fault zone features such as ground rupture, sag ponds, shutter ridges, and offset fences. Changes to the landscape since 1906 have included erosion and grading of the land, building of houses and other structures, and more tree cover compared to previous grassland vegetation. Our project is part of 1906 Earthquake Centennial activities; it is contributing to the photo archive that helps scientists and engineers who study earthquakes and their effects. It will also help the general public to better understand the environment where they live, and will remind them to be prepared for the next earthquake that will certainly come to the San Francisco Bay Area.

Grove, K.; Prentice, C.; Polly, J.; Yuen, C.; Wu, K.; Zhong, S.; Lopez, J.

2005-12-01

230

Lake level observations to detect crustal tilt: San Andreas Lake, California, 1979-1989  

Energy Technology Data Exchange (ETDEWEB)

A pair precision lake level gauging stations, installed in 1978, have been monitoring differential crustal uplift (crustal tilt) at San Andreas lake, California, near the suspected epicenter on the San Andreas fault of the M = 8.3, 1906 San Francisco earthquake. The stations are installed in the lake with a 4.2 km station separation parallel to the San Andreas fault. The gauging stations use quartz pressure transducers that are capable of detecting intermediate to long-term vertical displacements greater than 0.4 mm relative to a fluid surface. Differencing data from the two sites reduces the noise contributed by atmospheric pressure, temperature, and density changes, and isolates the relative elevation changes between the ends of the lake. At periods less than 20 minutes, the differenced data are dominated by lake seiches which have a fundamental mode at a period of 13 {plus minus} 0.3 minutes. These seiche harmonics can be filtered or predicted and removed from the data. Wind shear, typically lasting several days, can generate apparent short term tilt of the lake and large seiche amplitudes. The tilt noise power spectrum obtained from these data decreases by about 15 dB/decade of frequency. Monthly averages of the data between 1979-1989 indicate a tilt rate of 0.02 {plus minus} 0.08 microradians/yr (down S34{degree}E). No measurable horizontal tilt has apparently occurred in this region of the San Andreas fault during the last decade, however, measurements of trilateration networks show this region to be undergoing a horizontal strain of 0.6 {plus minus} 0.2 {mu}strain/yr.

Mueller, R.J.; Johnston, M.J.S.; Myren, G.D. (Geological Survey, Menlo Park, CA (USA)); Murray, T. (Cascades Volcano Observatory, Vancouver, WA (USA))

1989-07-01

231

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

232

San Diego Coastal Ocean Observing System (SDCOOS)  

Science.gov (United States)

SDCOOS provides a gateway for up-to-date oceanographic, weather, and water quality data for the San Diego coastal region from Oceanside to the International Border. The SDCOOS site features webcams, an interactive satellite picture and maps of the local coast, easy to access archived data, and complete meteorological and oceanographic data from Imperial Beach. Also available are bathymetry and satellite maps for the area, as well as wind and wave forecasts.

233

New IP SAN Era in Cluster Mirroring  

OpenAIRE

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) plannin...

Mr. Rajendra Purohit; Amit Mishra

2012-01-01

234

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

235

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

236

Bismuth ochers from San Diego Co., California  

Science.gov (United States)

The chief points brought out in this paper may be briefly summarized as follows: (1) The existence of natural Bi2O3 has not been established. (2) Natural bismite or bismuth ocher, when pure, is more probably a bismuth hydroxide. (3) The bismuth ochers from San Diego County, California, are either a bismuth hydroxide or bismuth vanadate, pucherite, or mixtures of these two. (4) Pucherite has been found noncrystallin and determined for the first time in the United States.

Schaller, W.T.

1911-01-01

237

Synthetic seismicity for the San Andreas fault  

OpenAIRE

Because historical catalogs generally span only a few repetition intervals of major earthquakes, they do not provide much constraint on how regularly earthquakes recur. In order to obtain better recurrence statistics and long-term probability estimates for events M ? 6 on the San Andreas fault, we apply a seismicity model to this fault. The model is based on the concept of fault segmentation and the physics of static dislocations which allow for stress transfer between segments. Constraints a...

Ward, S. N.; Goes, S. D. B.

1994-01-01

238

The San Andreas Fault System, California, USA  

Science.gov (United States)

Geologists, seismologists, and geophysicists have intensively studied the San Andreas fault system for the past 20 to 30 years. Their goals were to learn more about damaging earthquakes, the behavior of major stirke-slip faults, and methods of reducing earthquake hazards in populated areas. Field geologic investigations, seismic networks, post-earthquake studies, precision geodetic surveys, and reflection and refraction seismic surveys are among the methods used to decipher the history, geometry, and mechanics of the system. -from Authors

Brown, R.D.; Wallace, R.E.; Hill, D.P.

1992-01-01

239

The San Joaquin Valley Westside Perspective  

Energy Technology Data Exchange (ETDEWEB)

Salt management has been a challenge to westside farmerssince the rapid expansion of irrigated agriculture in the 1900 s. Thesoils in this area are naturally salt-affected having formed from marinesedimentary rocks rich in sea salts rendering the shallow groundwater,and drainage return flows discharging into the lower reaches of the SanJoaquin River, saline. Salinity problems are affected by the importedwater supply from Delta where the Sacramento and San Joaquin Riverscombine. Water quality objectives on salinity and boron have been inplace for decades to protect beneficial uses of the river. However it wasthe selenium-induced avian toxicity that occurred in the evaporationponds of Kesterson Reservoir (the terminal reservoir of a planned but notcompleted San Joaquin Basin Master Drain) that changed public attitudesabout agricultural drainage and initiated a steady stream ofenvironmental legislation directed at reducing non-point source pollutionof the River. Annual and monthly selenium load restrictions and salinityand boron Total Maximum Daily Loads (TMDLs) are the most recent of thesepolicy initiatives. Failure by both State and Federal water agencies toconstruct a Master Drain facility serving mostly west-side irrigatedagriculture has constrained these agencies to consider only In-Valleysolutions to ongoing drainage problems. For the Westlands subarea, whichhas no surface irrigation drainage outlet to the San Joaquin River,innovative drainage reuse systems such as the Integrated Farm DrainageManagement (IFDM) offer short- to medium-term solutions while morepermanent remedies to salt disposal are being investigated. Real-timesalinity management, which requires improved coordination of east-sidereservoir releases and west-side drainage, offers some relief toGrasslands Basin farmers and wetland managers - allowing greater salinityloading to the River than under a strict TMDL. However, currentregulation drives a policy that results in a moratorium on all drainagereturn flows.

Quinn, Nigel W.T.; Linneman, J. Christopher; Tanji, Kenneth K.

2006-03-27

240

Highly magnetic Upper Miocene sandstones of the San Francisco Bay area, California  

Science.gov (United States)

A high-resolution aeromagnetic survey of the San Francisco Bay area shows prominent positive anomalies over distinctive blue sandstones of Late Miocene age. The total-field survey was measured at a nominal height of 300 m above the land surface along flight lines spaced 0.5 km apart. Anomalies with amplitudes up to 200 nT correlate with sandstones of the San Pablo Group, and these anomalies are similar in strength to the magnetic signatures of serpentinites and basalts in the surveyed region. Andesitic sandstone of the Neroly Formation, the upper part of the San Pablo Group, has high magnetic susceptibility (0.013 SI units, volume) and relatively strong natural remanent magnetization (0.29 A/m). Total magnetization of the sandstone is two thirds induced and one third remanent magnetization. The presence of coarse-grained magnetite detritus, low coercivity of remanence, low thermal stability of remanence, and multidomain properties is consistent with the NRM being a viscous remanent magnetization that grew during the Brunhes normal-polarity chron. The strong magnetic signature of the Upper Miocene sandstones allows their delineation over distances as great as 100 km, through areas where they are concealed by landslides and younger deposits. The sandstones are important structural markers for understanding the complex folding and faulting associated with active fault systems in the San Francisco Bay area.

Hillhouse, John W.; Jachens, Robert C.

2005-05-01

241

SANS experiments and molecular dynamics studies of asphaltenes : driving force and morphology of nano-aggregation  

Energy Technology Data Exchange (ETDEWEB)

Small-angle scattering experiments have shown that asphaltenes form nanoaggregates, but their shape, arrangement and the driving force behind their formation are not well understood. This study used SANS experiments to probe the shape of the asphaltene nanoaggregates in toluene solution and crude oil. Molecular Dynamics simulations of model asphaltene structures were used to discover the most probable morphology of asphaltene molecules in nanoaggregates and the nature and strength of the driving force behind aggregation. SANS experiments were conducted on heptane extracted asphaltenes in d8-toluene and on a crude oil. In addition, V-SANS experiments were conducted on the crude oil. Potential of Mean Force (PMF) calculations between pairs of asphaltene molecules were conducted in baths of explicit solvent molecules, both toluene and heptane. The free energy of aggregation was found to be approximately -8 kJ mol-1. There was little difference between the PMF curves in toluene and heptane, indicating that the nano-aggregation process is relatively independent of solvent. This implies that it is larger scale aggregation seen in the V-SANS experiments that occurs in heptane and does not occur in toluene. Larger simulations were also conducted for 6 asphaltene molecules in a box of solvent at 7wt per cent asphaltene. Preliminary results showed that aggregation does occur spontaneously. Further analysis of the simulations is ongoing to determine the most probable morphology of asphaltene aggregates. 2 refs.

Headen, T.F.; Skipper, N.T. [Univ. College London (United Kingdom). Dept. of Physics and Astronomy; Boek, E.S. [Schlumberger Cambridge Research, Cambridge (United Kingdom)

2008-07-01

242

A 4300 year strontium isotope record of estuarine paleosalinity in San Francisco Bay, California  

Science.gov (United States)

Strontium isotopic compositions of carbonate mollusk shells from estuarine sediments cored beneath San Francisco Bay are used to derive a record of mean annual salinity and average freshwater inflow to the estuary for intervals during the past 4300 yrs. The large difference in the 87Sr/ 86Sr ratio between seawater (0.7092) and the average freshwater entering the estuary (0.7065) produces a correlation between 87Sr/ 86Sr and salinity in bay waters that can be detected with high-precision measurements. Paleosalinity is inferred from the 87Sr/ 86Sr ratio measured in fossil carbonate shells of bivalves preserved in the sediment. Because salinity in San Francisco Bay is primarily controlled by the freshwater inflow from the Sacramento and San Joaquin rivers, the paleosalinity record can be converted to a paleodischarge record using a transfer function derived from historical data. Salinity data are referenced to modern values estimated for the estuary after correcting for the lower discharge caused by diversion since 1850 A.D. Data are presented from Richardson Bay, located near the estuary mouth (modern mear arrival salinity (MAS) of ca. 24‰), and from San Pablo Bay, located about 30 km upstream (modern MAS of ca. 18-20‰). For Richardson Bay, the data cover the periods 0-600 yrs B.P. and 2200-4300 yrs B.P., based on radiocarbon dating. For San Pablo Bay, the periods 0-130 yrs B.P. and 2500-2800 yrs B.P. are represented. The Richardson Bay data indicate extended periods of low salinity relative to modern, indicating higher freshwater inflow, at ca. 80, 220, 310, 440-500, 3100-3400 and 4300 yrs ago. The data indicate high salinity relative to modern, hence lower freshwater inflow, at about 40, 140-210, 270, 2100 and 3450-3700 yrs B.P. For San Pablo Bay, where salinity resolution is better, salinity was lower than modern during the period at ca. 50 and 2550-2650 yrs B.P., and higher than modern at ca 90-110, 155 and 2510-2530 yrs B.P. The data suggest that mean annual discharge to San Francisco Bay typically varies between values that are below the modern value (600 m 3/s) and values 2 to 3 times as high; the average paleosalinity is typically substantially lower than the modern values. The 4300 yr average freshwater inflow is estimated to be ? 1200 ± 200 m 3/s. The record indicates that quasi-cyclic variations in mean annual discharge occur naturally with a period of about 200 yrs or less.

Lynn Ingram, B.; DePaolo, Donald J.

1993-08-01

243

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

244

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

245

Development of 40m SANS and Its Utilization Techniques  

Energy Technology Data Exchange (ETDEWEB)

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

Choi, Sung Min; Kim, Tae Hwan [KAERI, Daejeon (Korea, Republic of)

2010-06-15

246

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 triangulated our KI interview find...

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

247

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

248

San Francisco's urban transformations since the 1980s  

OpenAIRE

This paper examines San Francisco's urban development transformations in the post-1980 decades. The transformations are examined through two spectrums: functional concentration and economic base. Through the variables of employment by land use and floor area by land use, the functional concentration analysis identifies the changes of the urban functions concentrated in San Francisco. The economic base analysis uses the data of employment by industry to find out San Francisco's economic transf...

Hu, Richard

2009-01-01

249

Study of the properties of an electron linac beam by means of the electromagnetic fields associated with the beam; Etude des proprietes du faisceau d'electrons d'un accelerateur lineaire au moyen des champs electromagnetiques associes a ce faisceau  

Energy Technology Data Exchange (ETDEWEB)

For measuring the diverse characteristic parameters of a Linac electron beam, the one method causing the least perturbation to the electron beam itself, consists in the detection of signals induced in certain types of detectors by the electromagnets fields associated with the beam. Some particular detectors are then described, for measuring the following characteristic parameters of a Linac electron beam; a) electron beam peak current, a) longitudinal dimension and density of an elementary electron bunch, c) phase position of the electrons on the travelling sine wave of the accelerating field, d) transverse position of the beam. These particular electrodes are then used to provide experimental data In order to check the theoretical computations giving the longitudinal and transversal motions Of the electrons during their acceleration. (author) [French] Parmi les methodes de mesure des diverses caracteristiques du faisceau d'electrons d'un accelerateur lineaire, celles qui perturbent le moins le faisceau sont les methodes dans lesquelles l'energie du signal de mesure provient de la perturbation par l'electrode de mesure des champs electromagnetiques associes au faisceau. On decrit les electrodes de ce type qui ont ete mises au point pour mesurer les caracteristiques suivantes du faisceau d'electrons: a) courant crete, b) extension en phase d'un paquet elementaire d'electrons, c) phase d'accrochage des electrons, d) position transversale moyenne des electrons. On decrit ensuite comment les signaux provenant de ces diverses electrodes peuvent etre utilises pour verifier experimentalement les previsions theoriques des mouvements longitudinaux et transversaux des electrons en cours d'acceleration. (auteur)

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

1967-07-01

250

English Articulation between the San Francisco Unified School District and the City College of San Francisco. Youth Data Archive Issue Brief  

Science.gov (United States)

San Francisco's Bridge to Success (BtS) initiative brings together the City and County of San Francisco, the San Francisco Unified School District (SFUSD), the City College of San Francisco (CCSF), and key community organizations to promote postsecondary success for underrepresented students. Various working groups, each comprised of staff from…

Gurantz, Oded

2012-01-01

251

33 CFR 165.758 - Security Zone; San Juan, Puerto Rico.  

Science.gov (United States)

...false Security Zone; San Juan, Puerto Rico. 165.758 Section 165.758...758 Security Zone; San Juan, Puerto Rico. (a) Location. Moving...anchored in the Port of San Juan, Puerto Rico. The security zone for a cruise...

2010-07-01

252

76 FR 14042 - San Luis Valley National Wildlife Refuge Complex, Alamosa, CO; Comprehensive Conservation Plan...  

Science.gov (United States)

...a CCP for the San Luis Valley National Wildlife Refuge...management of the San Luis Valley National Wildlife Refuge...environmental review of this project and develop an EIS in...and regulations. San Luis Valley National Wildlife...

2011-03-15

253

76 FR 35024 - Precision Dynamics Corporation San Fernando, CA; Precision Dynamics Corporation, Also Known as...  

Science.gov (United States)

...Precision Dynamics Corporation San Fernando, CA; Precision Dynamics Corporation...Precision Dynamics Corporation, San Fernando, California. The workers are engaged...operated in conjunction with the San Fernando, California location of Precision...

2011-06-15

254

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

255

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

256

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

257

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

Science.gov (United States)

...San Nicolas Island, California...waters of the Pacific Ocean surrounding San Nicolas Island, California...comment because of technical difficulties...around San Nicolas Island was established...the Commander, Pacific Missile...

2013-11-22

258

75 FR 71106 - San Jose Water Company; Notice of Application Accepted for Filing and Soliciting Comments...  

Science.gov (United States)

...No. 13799-000] San Jose Water Company; Notice...2010. d. Applicant: San Jose Water Company. e. Name...in Santa Clara County, California. g. Filed Pursuant to...Contact: Thomas Gee, San Jose Water Company, 1265...

2010-11-22

259

75 FR 54377 - Cattle Point Road Relocation; Draft Environmental Impact Statement; San Juan Island National...  

Science.gov (United States)

...Statement; San Juan Island National Historical...FHWA), Department of Transportation, co-lead agencies...located in San Juan Island National Historical...2004, on San Juan Island. Project team members...Feasibility Study, and plans for rare plant...

2010-09-07

260

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

Science.gov (United States)

...false Pacific Ocean at San Miguel Island, Calif...Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY...1140 Pacific Ocean at San Miguel Island, Calif...11th Naval District, San Diego, California, may...

2010-07-01

261

33 CFR 334.921 - Pacific Ocean at San Clemente Island, Calif.; naval restricted area.  

Science.gov (United States)

...false Pacific Ocean at San Clemente Island, Calif...Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY...921 Pacific Ocean at San Clemente Island, Calif...Commander, Naval Base, San Diego, and such agencies...

2010-07-01

262

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

263

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

Science.gov (United States)

...2010-07-01 2010-07-01 false San Francisco Bay Area Intrastate Air Quality...Control Regions § 81.21 San Francisco Bay Area Intrastate Air Quality Control Region. The San Francisco Bay Area Intrastate...

2010-07-01

264

77 FR 45652 - Final Program Environmental Impact Statement/Environmental Impact Report for the San Joaquin...  

Science.gov (United States)

...States and the Central Valley Project...in the mainstem San Joaquin River below Friant...through the Act. The San Joaquin River Restoration...conditions in the Central Valley. The Final...and involves the San Joaquin River, from...

2012-08-01

265

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

266

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

267

77 FR 66548 - 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...Plan, San Joaquin Valley Unified Air Pollution Control District's Rule...

2012-11-06

268

76 FR 26609 - 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....

2011-05-09

269

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

Science.gov (United States)

...DESIGNATION OF AREAS FOR AIR QUALITY... § 81.164 San Diego Intrastate Air...Region. The San Diego Intrastate...the territorial area encompassed...boundaries of the area so delimited...California: San Diego County....

2010-07-01

270

33 CFR 334.860 - San Diego Bay, Calif., Naval Amphibious Base; restricted area.  

Science.gov (United States)

...2010-07-01 false San Diego Bay, Calif...Base; restricted area. 334.860 ...ZONE AND RESTRICTED AREA REGULATIONS § 334.860 San Diego Bay, Calif...Ocean in Middle San Diego Bay in an area extending...

2010-07-01

271

33 CFR 334.870 - San Diego Harbor, Calif.; restricted area.  

Science.gov (United States)

...2010-07-01 false San Diego Harbor, Calif.; restricted area. 334.870 Section...REGULATIONS § 334.870 San Diego Harbor, Calif.; restricted area. (a) Restricted...The area. An area in San Diego Bay between...

2010-07-01

272

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

273

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

274

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.

275

Toxicity of Eun-bi San Pharmacopuncture Injection in the Muscle of Rats  

Science.gov (United States)

Objectives: This study was carried out to analyze the single-dose toxicity of Eun-Bi San pharmacopuncture injected into the muscle of Sprague-Dawley (SD) rats. Methods: All experiments were performed at Biotoxtech, an institution certified to conduct non-clinical studies under the Good Laboratory Practice (GLP) regulations. Six week old SD rats reared by ORIENTBIO were chosen for this pilot study. The reason SD rats were chosen is that they have been widely used in safety tests in the field of medicine, so the results can be easily compared with many other databases. The Eun-Bi San pharmacopuncture was made in a clean room at the Korean Pharmacopuncture Institute (KPI, K-GMP). The constituents of the Eun-Bi San pharmacopuncture are Angelicae gigantis radix, Strychni semen and Glycyrrhizae radix. These were extracted at low temperature and low pressure in an aseptic room at the KPI. Doses of Eun- Bi San pharmacopuncture, 0.25, 0.5 and 1.0 mL, were administered to the experimental groups, and a dose of normal saline solution, 1.0 mL, was administered to the control group. This study was performed under the approval of the Institutional Animal Ethics Committee of Biotoxtech Co., Ltd. Results: No deaths or abnormalities occurred in any of the four groups. No significant changes in weight, hematological parameters or clinical chemistry between the control group and the experimental groups were observed. To determine if abnormalities existed in any organs and tissues, we used microscopy to examine representative histological sections of each specified organ; the results showed no significant differences in any of the organs or tissues. Conclusion: The results of this study suggest that treatment with Eun-Bi San pharmacopuncture is relatively safe and that its clinical use may be beneficial. Further evaluations and studies on this subject will be needed to provide more concrete evidence in support of these conclusions.

Lee, Jongcheol; Jeong, Hohyun; Cha, Eunhye; Park, Manyong; Choi, Sungyoul; Yook, Taehan; Song, InJa; Kim, Sungchul

2015-01-01

276

Antidepressant effects of Soyo-san on Immobilization stress in ovariectomized female rats.  

Science.gov (United States)

Soyo-san is a traditional oriental medicinal formula, a mixture of 9 crude drugs, and it has been clinically used for treating mild depressive disorders. The purpose of the study was to examine the effect of Soyo-san on repeated stress-induced alterations of learning and memory on a Morris water maze (MWM) task and also the anxiety-related behavior on the elevated pulse maze (EPM) in ovariectomized female rats. We assessed the changes in the reactivity of the cholinergic system by measuring the immunoreactive neurons of choline acetyltransferase (ChAT) and reactivity of acetylcholinesterase (AChE) in the hippocampus, and the serum levels of corticosterone were assessed after behavioral testing. The female rats were randomly divided into three groups: the nonoperated and nonstressed group (normal), the ovariectomized and stressed group (control), and the ovariectomized, stressed and Soyo-san treated group (SOY). The rats were exposed to immobilization stress (IMO) for 14 d (2 h/d), and Soyo-san (400 mg/kg, i.p.) was administered 30 min before IMO stress. Treatments with SOY caused significant reversals of the stress-induced deficits in learning and memory on a spatial memory task, and it also produced an anxiolytic-like effect on the EPM, and increased the ChAT and AChE reactivities (pserum level of corticosterone in the SOY group was significantly lower than that in the control group (p<0.05). These results suggest that Soyo-san might prove to be an effective antidepressant agent. PMID:17666797

Oh, Jin Kyung; Kim, Yoon-Sang; Park, Hyun-Jung; Lim, Eun-Mee; Pyun, Kwang-Ho; Shim, Insop

2007-08-01

277

Il Maestro della Commenda di Meldola e la magione ospitaliera di San Giovanni Battista  

Directory of Open Access Journals (Sweden)

Full Text Available L’intervento propone, attraverso l’indagine di alcuni dipinti di area forlivese, una prima ricostruzione della personalità di un interessante interprete locale del XV secolo, provvisoriamente denominato Maestro della Commenda di Meldola. Lo studio, parte integrante della mia tesi di dottorato, prende le mosse dall’analisi dell’affresco dell’Oratorio di San Giovanni Battista a Meldola, per poi allargarsi ad altre emergenze del territorio circostante, fino ai lacerti pittorici emersi nella chiesa della Santissima Trinità di Forlì. Nella prima parte dell’articolo viene ricostruita la storia dell’Oratorio di San Giovanni Battista presso Villa Fronticelli a Meldola: già magione templare di Santa Maria Biacque, nel 1312, in seguito al processo ai templari, passò alle dipendenze della precettoria dei cavalieri gerosolimitani di San Giovanni di Palareto. La realizzazione dell’affresco deve essere probabilmente inserita all’interno dei lavori di ristrutturazione intrapresi dai giovanniti dopo la metà del XV secolo. Nella seconda parte dell’articolo invece si procede alle indagini tecniche e stilistiche relative alla pittura murale che rappresenta la Madonna col Bambino e San Giovanni Battista. L’affresco mutilo è opera di un interessante maestro che agisce nella sfera del tardogotico locale, mostrando però tenui accenti rinascimentali caratteristici alla pittura forlivese tra sesto e settimo decennio del Quattrocento. Muovendo dalle ricerche di Anna Tambini e Giordani Viroli, attraverso l’analisi di diverse testimonianze del territorio, viene così proposta la ricostruzione di un corpus pittorico caratterizzato da stringenti affinità stilistiche, che, confermando l’appartenenza del suo anonimo pittore ad un milieu stilistico caro ad altri interpreti forlivesi del periodo, come il Maestro di Castrocaro o il Maestro di San Pier Damiani, aiuta ulteriormente a chiarire il panorama artistico romagnolo all’avvento della 'brigada melozziana'.

Paolo Cova

2012-02-01

278

Spatiotemporal variation patterns of plants and animals in San Carlos de Apoquindo, central Chile Patrones de variación espaciotemporal de plantas y animales en San Carlos de Apoquindo, Chile central  

OpenAIRE

I summarize what is known about the mediterranean ecosystem represented in San Carlos de Apoquindo (33º 23' S, 70º 31' W), a rugged area of 835 ha located ca. 20 km east of downtown Santiago on the Andean foothills. This site attracted numerous researchers during 1976-1990 because of its proximity to Santiago and its relatively protected status. I review the literature, and provide unpublished information on this site. A total of 132 literature entries describe the ecology of San Carlos de ...

Jaksic, Fabia?n M.

2001-01-01

279

Chinanteco de San Juan Lealao, Oaxaca (Chinantec of San Juan Lealao, Oaxaca).  

Science.gov (United States)

This document is one of 17 volumes on indigenous Mexican languages and is the result of a project undertaken by the Archivo de Lenguas Indigenas de Mexico. This volume contains information on Chinantec, an indigenous language of Mexico spoken in San Juan Lealao, in the state of Oaxaca. The objective of collecting such a representative sampling of…

Mexico Coll. (Mexico City)

280

Huave de San Mateo del Mar, Oaxaca (Huave of San Mateo del Mar, Oaxaca).  

Science.gov (United States)

This document is one of 17 volumes on indigenous Mexican languages and is the result of a project undertaken by the Archivo de Lenguas Indigenas de Mexico. This volume contains information on Huave, an indigenous language of Mexico spoken in San Mateo del Mar, in the state of Oaxaca. The objective of collecting such a representative sampling of…

Mexico Coll. (Mexico City)

281

Trique de San Juan Copala, Oaxaca (Trique of San Juan Copala, Oaxaca).  

Science.gov (United States)

This document is one of 17 volumes on indigenous Mexican languages and is the result of a project undertaken by the Archivo de Lenguas Indigenas de Mexico. This volume contains information on Trique, an indigenous language of Mexico spoken in San Juan Copala, in the state of Oaxaca. The objective of collecting such a representative sampling of the…

Mexico Coll. (Mexico City)

282

78 FR 53245 - Safety Zone; San Diego Bayfair; Mission Bay, San Diego, CA  

Science.gov (United States)

...navigable waters of Mission Bay. Before the effective...the waters of Mission Bay in San Diego, California from 7 a.m. to 5...navigable waters of Mission Bay, traffic would be allowed...safety or security of people, places or...

2013-08-29

283

Arquitectura de remeseros en San Pedro de Atacama / Architecture of ranchers in San Pedro de Atacama  

Scientific Electronic Library Online (English)

Full Text Available El cuerpo de material arquitectónico asociado al tiempo de las remesas de ganado en San Pedro de Atacama no parece formar parte del discurso patrimonial local. Sin embargo, su propia invisibilidad y memoria demostrarían que forma parte importante de la identidad atacameña. [...

Flora, Vilches; Lorena, Sanhueza; Cristina, Garrido.

2014-12-01

284

78 FR 42027 - Safety Zone; San Diego Bayfair; Mission Bay, San Diego, CA  

Science.gov (United States)

...The San Diego Bayfair power boat races occur annually over a...includes numerous safety support boats. The Ports and Waterways Safety...approximately 200 various power boats racing on a predetermined course...sponsor will provide thirty seven patrol and rescue vessels to help...

2013-07-15

285

Abundance, Health and Status of Sand Crabs at Ocean Beach, San Francisco: Comparisons From two Summers, 2003 and 2004  

Science.gov (United States)

Interns from the California Academy of Sciences in San Francisco monitored Pacific mole crabs, Emerita analoga, commonly known as sand crabs, at Ocean Beach, San Francisco for the second consecutive summer. Comparisons from two data sets revealed trends in crab abundance, size and location. Changes in abundance and location may have been related to water temperature and predation. Dissections of random crabs from all gender classes allowed inspection of parasitism on the crabs. The dissections revealed increased numbers of parasites in larger crabs (especially females with eggs) and in crabs collected later in the summer season. Crab parasitism may be connected to population changes of species predating the sand crabs.

Conrad-Saydah, A.; MacCormack, D.; Velarde, M.; Masters, D.; Walton, M.

2004-12-01

286

The pyroclastic dikes of the Tertiary San Luis Potosí volcanic field: Implications on the emplacement of Panalillo ignimbrite  

Directory of Open Access Journals (Sweden)

Full Text Available Pyroclastic dikes emplaced along regional NW-SE faults in the Tertiary San Luis Potosí Volcanic Field consist of vitric pumice shards, rhyolite lithics, and broken crystals of quartz, sanidine, and biotite. These clasts display a parallel orientation inside the dikes and have developed devitrification structures after emplacement.The presence of these pyroclastic dikes associated to normal faults and their relation to the Oligocene pyroclastic sequences of the San Luis Potosí Volcanic Field suggests that they may represent the feeding conduits from which the Panalillo ignimbrite was erupted.

M. Gómez-Anguiano

2006-09-01

287

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 (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

288

Risk Behaviors among Asian Women Who Work at Massage Parlors in San Francisco: Perspectives from Masseuses and Owners/Managers  

Science.gov (United States)

This study investigates cognitive, cultural, and contextual factors that influence HIV-related risk behaviors among Asian women who engage in sex work at massage parlors in San Francisco. Focus groups and qualitative interviews were conducted for Vietnamese and Thai masseuses and massage parlor owners/managers. Economic pressure as well as…

Nemoto, Tooru; Iwamoto, Mariko; Oh, Hyun Joo; Wong, Serena; Nguyen, Hongmai

2005-01-01

289

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

International Nuclear Information System (INIS)

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

290

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

291

Late Cenozoic stratigraphy and structure of the western margin of the central San Joaquin Valley, California  

Science.gov (United States)

Late Cenozoic Stratigraphy Late Cenozoic deposits in the west-central San Joaquin Valley and adjacent foothills of the Diablo Range consist mainly of unconsolidated, poorly-sorted to well-sorted gravel, sand, silt and clay derived primarily from the Diablo Range and secondarily from the Sierra Nevada. Sedimentary structures, such as channeled contacts, laminated bedding, cross-stratification and clast-imbrication indicate that most of the deposits were transported and laid down by running water. These deposits are described and their facies relationships are illustrated in the 'Late Cenozoic Stratigraphy' section of this report (see Figures 17, and 26, and Table 9). Sediment shed from the Diablo Range accumulated primarily as a complex of coalescing alluvial fans on the piedmont slope of a San Joaquin Valley that at one time extended across the foothill belt to the present margin of the central Diablo Range; and as local fills within stream valleys of the Diablo Range foothills tributary to the San Joaquin Valley. These deposits are well exposed in Interstate-5 roadcuts, California Aqueduct and Delta-Mendota canal cuts, and stream banks along the many ephemeral and intermittent streams draining the Diablo Range. Sediment derived from the Sierra Nevada is confined primarily to the floodbasin of the San Joaquin Valley. It includes arkosic riverine and floodbasin deposits from the San Joaquin River and associated sloughs, as well as local ephemeral and perennial pond, swamp, oxbow-lake and lake deposits. These deposits are well-exposed in stream banks of the San Joaquin River and a few of the larger sloughs such as Salt Slough, Mud Slough and Kings Slough. Well-sorted, fine- and medium-grained, quartzose, cross-bedded sand, presumably derived from the Sierra Nevada, locally interfinger with or underlie fine-grained Coast Range alluvial-fan deposits. The sand probably originated by eolian reworking of Sierran alluvium from the floodbasin of the lower San Joaquin River or from fans of the northeastern San Joaquin Valley. These deposits are locally well exposed in Interstate-5 roadcuts, primarily between Orestimba and Garzas Creeks. The geomorphic character of the alluvium laid down by streams draining the Diablo Range reflects late Cenozoic uplift of the foothills and subsidence of the valley. Within the foothills and near the foothill-valley margin, the deposits form a sequence of inset stream terraces and nested alluvial fans. Valleyward, however, each deposit forms a veneer over older alluvial-fan deposits. Based primarily on geomorphic and pedologic indicators of relative age (see Figure 19 and Table 10), and to a lesser extent on lithologic and absolute age criteria, the late Cenozoic deposits are divided into five stratigraphic units. In order of decreasing age, these include the formally recognized Tulare Formation (Watts, 1894; Anderson, 1905) of late Pliocene and Pleistocene age, and the informally named Los Banos alluvium of middle and late Pleistocene age, San Luis Ranch alluvium of late Pleistocene and early Holocene age, and Patterson alluvium and Dos Palos alluvium of Holocene age. The Los Banos and San Luis Ranch alluvium are further divided into three and two members, respectively. Each of these members ranges in thickness from less than I m up to 15 m and thus represents, at least in part, a distinct period of aggradation. The lithology age and distribution of these units is described in the 'Stratigraphie Divisions' section of this report and is summarized in Figure 25 and Table 11. Plates 1 through 23 show the local distribution of these units on 7.5-minute Quadrangles. Mapping criteria are diagrammatically illustrated in Figure 19 and described in the 'Mapping Criteria' section of this report. Indirect evidence suggests that deposition of these units resulted primarily from climatic change rather than intermittent uplift of the Diablo Range. The units are recognized throughout 1500 Km

Lettis, William R.

1982-01-01

292

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

293

Biological effects of anthropogenic contaminants in the San Francisco Estuary  

Science.gov (United States)

Concentrations of many anthropogenic contaminants in the San Francisco Estuary exist at levels that have been associated with biological effects elsewhere, so there is a potential for them to cause biological effects in the Estuary. The purpose of this paper is to summarize information about biological effects on the Estuary's plankton, benthos, fish, birds, and mammals, gathered since the early 1990s, focusing on key accomplishments. These studies have been conducted at all levels of biological organization (sub-cellular through communities), but have included only a small fraction of the organisms and contaminants of concern in the region. The studies summarized provide a body of evidence that some contaminants are causing biological impacts in some biological resources in the Estuary. However, no general patterns of effects were apparent in space and time, and no single contaminant was consistently related to effects among the biota considered. These conclusions reflect the difficulty in demonstrating biological effects due specifically to contamination because there is a wide range of sensitivity to contaminants among the Estuary's many organisms. Additionally, the spatial and temporal distribution of contamination in the Estuary is highly variable, and levels of contamination covary with other environmental factors, such as freshwater inflow or sediment-type. Federal and State regulatory agencies desire to develop biological criteria to protect the Estuary's biological resources. Future studies of biological effects in San Francisco Estuary should focus on the development of meaningful indicators of biological effects, and on key organism and contaminants of concern in long-term, multifaceted studies that include laboratory and field experiments to determine cause and effect to adequately inform management and regulatory decisions. ?? 2006 Elsevier Inc. All rights reserved.

Thompson, B.; Adelsbach, T.; Brown, C.; Hunt, J.; Kuwabara, J.; Neale, J.; Ohlendorf, H.; Schwarzbach, S.; Spies, R.; Taberski, K.

2007-01-01

294

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

2007-08-01

295

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

296

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

297

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)

298

The San Onofre neutrino oscillation experiment  

International Nuclear Information System (INIS)

A detector for the study of neutrino oscillations with a projected sensitivity for ?m2 of 10-3eV2 and a mixing angle sensitivity of sin22?=0.1 is described. The detector is a segmented 12 ton liquid scintillator with neutron background rejection based on a coincidence between a positron and its annihilation radiation. It will be installed at a distance of 0.65km from the San Onofre reactors, at a depth of 25mwe below surface, surrounded by neutron buffer and an active muon veto. The projected event rate will be 17d-1. Detailed studies of the detector are presented. ((orig.))

299

Inversion climatology at San Jose, California  

Science.gov (United States)

Month-to-month variations in the early morning surface-based and near-noon elevated inversions at San Jose, Calif., were determined from slow rise radiosondes launched during a four-year period. A high frequency of shallow, radiative, surface-based inversions were found in winter during the early morning hours, while during the same period in summer, a low frequency of deeper based inversions arose from a combination of radiative and subsidence processes. The frequency of elevated inversions in the hours near noon was lowest during fall and spring, while inversion bases were highest and thicknesses least during these periods.

Morgan, T.; Bornstein, R. D.

1977-01-01

300

Characterization of nanoporous superalloy by SANS  

International Nuclear Information System (INIS)

The self-assembly of the ?'-precipitates in superalloy during thermo-mechanical exposure can be used to produce a nanoporous material by a selective phase dissolution. Nanoporous superalloy (CMSX4) samples, containing narrow channel-like pores, were investigated by high-resolution small-angle neutron scattering (SANS) in order to observe a time dependence of the pore depth during etching. The mean distance of pores and their depths were determined. A saturation of the pore depth with etching time was observed

301

UC-San Diego Laboratory Safety Videos  

Science.gov (United States)

The University of California-San Diego has gone above and beyond with this marvelous collection of laboratory safety videos. Designed for use in academic settings, these short and informative videos provide a wealth of information. Currently there are twelve videos on the site and they include "Flash Chromatography 101," "Basic Fume Hood Air Flow and Operation," and "How to Handle Pyrophoric Reagents." One of the more fun videos here is "The Periodic Table of Videos," which offers a brief video on each of the elements. Visitors should also note that the site includes helpful information about general lab safety and chemical safety training.

2012-01-01

302

78 FR 53109 - Security Zones; Naval Base Point Loma; Naval Mine Anti-Submarine Warfare Command; San Diego Bay...  

Science.gov (United States)

...safety or security of people, places or vessels...Point Loma; San Diego Bay, San Diego, CA...Point Loma, San Diego, California; Designated Representative...Warfare Command; San Diego Bay, San Diego, CA...Point Loma, San Diego, California; Designated...

2013-08-28

303

Characterization of alumina using small angle neutron scattering (SANS)  

International Nuclear Information System (INIS)

Alumina powder was synthesized from an aluminium precursor and studied using small angle neutron scattering (SANS) technique and complemented with transmission electron microscope (TEM). XRD measurement confirmed that the alumina produced was high purity and highly crystalline ?phase. SANS examination indicates the formation of mass fractals microstructures with fractal dimension of about 2.8 on the alumina powder. (Author)

304

History of the Italian San Marco equatorial mobile range  

Science.gov (United States)

Events leading to the development of the San Marco Equatorial Range are presented. Included are background information leading to the cooperative space program between the United States and Italy, conceptual planning, training activities, equipment design and fabrication, and range utilization. The technical support provided the San Marco Program by Scout Project Office, and other NASA installations is described.

Nesbitt, H. N.

1971-01-01

305

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.

306

San Ysidro High School: An Invincible Sense of Promise  

Science.gov (United States)

Commitment to one another, determination to prove stereotypes wrong, and a strong belief in the power of education are the core values at San Ysidro High School in San Diego, California. The school serves 2,364 students in one of the poorest communities in the country. The community celebrates its predominately Mexican-American heritage and…

Principal Leadership, 2013

2013-01-01

307

77 FR 47358 - San Juan National Forest Resource Advisory Committee  

Science.gov (United States)

...the San Juan Public Lands Center, 15 Burnett Court, Durango, Colorado in the Sonoran...Juan Public Lands Center Building, 15 Burnett Court, Durango, Colorado. Please call...Attn: San Juan National Forest RAC, 15 Burnett Court, Durango, CO 81301, or by...

2012-08-08

308

The San Diego Panasonic Partnership: A Case Study in Restructuring.  

Science.gov (United States)

The Panasonic Foundation provides resources for restructuring school districts. The article examines its partnership with the San Diego City School District, highlighting four schools that demonstrate promising practices and guiding principles. It describes recent partnership work on systemic issues, noting the next steps to be taken in San Diego.…

Holzman, Michael; Tewel, Kenneth J.

1992-01-01

309

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

310

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

311

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

312

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

313

Puente Coronado - San Diego (EE. UU.  

Directory of Open Access Journals (Sweden)

Full Text Available This 3,5 km long bridge, joining the cities of San Diego and Coronado is one of the longest in the world of this type, and one of the three most important straight line bridges in the United States. Its supporting structure consists of reinforced concrete columns resting on footings or piles, according to whether they are under the sea water or on dry land. The superstructure is partly of metal plates and partly of box girders. The surfacing of the deck consists of asphalt epoxy concrete, of 5 cm depth. Special paint was applied to the bridge, including layers of vinyl, iron oxide and blue vinyl on a zinc base.Este puente, de unos 3 km y medio, que une las ciudades de San Diego y Coronado es uno de los de mayor longitud del mundo, de este tipo, y uno de los tres principales ortótropos de los Estados Unidos de América. Su infraestructura está constituida por pilas de hormigón armado apoyadas sobre pilotes o sobre zapatas, según estén en el mar o en tierra firme. La superestructura está formada, en parte, por chapas metálicas y, en parte, por vigas cajón. El acabado del tablero metálico se realizó a base de hormigón asfáltico de epoxi con un espesor de 5 cm. La pintura es especial y se compone de capas de vinilo, de óxido de hierro y de vinilo azul sobre una capa de cinc.

Editorial, Equipo

1971-12-01

314

Synthetic seismicity for the San Andreas fault  

Directory of Open Access Journals (Sweden)

Full Text Available Because historical catalogs generally span only a few repetition intervals of major earthquakes, they do not provide much constraint on how regularly earthquakes recur. In order to obtain better recurrence statistics and long-term probability estimates for events M ? 6 on the San Andreas fault, we apply a seismicity model to this fault. The model is based on the concept of fault segmentation and the physics of static dislocations which allow for stress transfer between segments. Constraints are provided by geological and seismological observations of segment lengths, characteristic magnitudes and long-term slip rates. Segment parameters slightly modified from the Working Group on California Earthquake Probabilities allow us to reproduce observed seismicity over four orders of magnitude. The model yields quite irregular earthquake recurrence patterns. Only the largest events (M ? 7.5 are quasi-periodic; small events cluster. Both the average recurrence time and the aperiodicity are also a function of position along the fault. The model results are consistent with paleoseismic data for the San Andreas fault as well as a global set of historical and paleoseismic recurrence data. Thus irregular earthquake recurrence resulting from segment interaction is consistent with a large range of observations.

S. N. Ward

1994-06-01

315

75 FR 8804 - Safety Zone; NASSCO Launching of USNS Charles Drew, San Diego Bay, San Diego, CA.  

Science.gov (United States)

...Zone; NASSCO Launching of USNS Charles Drew, San Diego Bay, San Diego, CA. AGENCY...United States Naval Ship (USNS) Charles Drew. The safety zone is necessary to provide...contribute to the safety of the USNS Charles Drew and surrounding vessels as this ship...

2010-02-26

316

Gain-loss study of lower San Pedro Creek and the San Antonio River, San Antonio, Texas, May-October 1999  

Science.gov (United States)

Five streamflow gain-loss measurement surveys were made along lower San Pedro Creek and the San Antonio River from Mitchell Street to South Loop 410 east of Kelly Air Force Base in San Antonio, Texas, during May?October 1999. All of the measurements were made during dry periods, when stormwater runoff was not occurring and effects of possible bank storage were minimized. San Pedro Creek and the San Antonio River were divided into six subreaches, and streamflow measurements were made simultaneously at the boundaries of these subreaches so that streamflow gains or losses and estimates of inflow from or outflow to shallow ground water could be quantified for each subreach. There are two possible sources of ground-water inflow to lower San Pedro Creek and the San Antonio River east of Kelly Air Force Base. One source is direct inflow of shallow ground water into the streams. The other source is ground water that enters tributaries that flow into the San Antonio River. The estimated mean direct inflow of ground water to the combined San Pedro Creek and San Antonio River study reach was 3.0 cubic feet per second or 1.9 million gallons per day. The mean tributary inflow of ground water was estimated to be 1.9 cubic feet per second or 1.2 million gallons per day. The total estimated inflow of shallow ground water was 4.9 cubic feet per second or 3.2 million gallons per day. The amount of inflow from springs and seeps (estimated by observation) is much less than the amount of direct ground-water inflow estimated from the gain-loss measurements. Therefore, the presence of springs and seeps might not be a reliable indicator of the source of shallow ground water entering the river. Most of the shallow ground water that enters the San Antonio River from tributary inflow enters from the west side, through Concepcion Creek, inflows near Riverside Golf Course, and Six-Mile Creek.

Ockerman, Darwin J.

2002-01-01

317

On simultaneous tilt and creep observations on the San Andreas Fault  

Science.gov (United States)

THE installation of an array of tiltmeters along the San Andreas Fault 1 has provided an excellent opportunity to study the amplitude and spatial scale of the tilt fields associated with fault creep. We report here preliminary results from, and some implications of, a search for interrelated surface tilts and creep event observations at four pairs of tiltmeters and creepmeters along an active 20-km stretch of the San Andreas Fault. We have observed clear creep-related tilts above the instrument resolution (10 -8 rad) only on a tiltmeter less than 0.5 km from the fault. The tilt events always preceded surface creep observations by 2-12 min, and were not purely transient in character. ?? 1975 Nature Publishing Group.

Johnston, M.J.S.; McHugh, S.; Burford, S.

1976-01-01

318

Simulation model of Skeletonema costatum population dynamics in northern San Francisco Bay, California  

Science.gov (United States)

A pseudo-two-dimensional model is developed to simulate population dynamics of one dominant phytoplankton species ( Skeletonema costatum) in northern San Francisco Bay. The model is formulated around a conceptualization of this estuary as two distinct but coupled subsystems—a deep (10-20 m) central channel and lateral areas with shallow (Pablo Bay) and the summer bloom upstream (Suisun Bay). Model output suggests that these spring and summer blooms result from the same general process—establishment of populations over the shoals, where growth rates are rapid, coupled with reduced particulate transport due to estuarine gravitational circulation. It also suggests, however, that the relative importance of physical and biological processes to phytoplankton dynamics is different in San Pablo and Suisun Bays. Finally, the model has helped us determine those processes having sufficient importance to merit further refinement in the next generation of models, and it has given new direction to field studies.

Cloern, James E.; Cheng, Ralph T.

1981-01-01

319

Structural response of polyelectrolyte dendrimer towards molecular protonation: the inconsistency revealed by SANS and NMR  

Science.gov (United States)

Polyamidoamine (PAMAM) dendrimers and their charged state in deuterium oxide have been investigated with proton pulsed field gradient diffusion nuclear magnetic resonance (PFG-NMR) and small-angle neutron scattering (SANS) techniques. NMR measurements suggest that significant variation of the hydrodynamic radius, calculated by the Stokes-Einstein relation with appropriate surface conditions, is observed upon increasing the molecular protonation. However, a comparative SANS experiment indicates little dependence of the dendrimer global size, in terms of its radius of gyration, on molecular protonation. The inconsistency indicates the necessity of incorporating the effect of molecular interface modification and molecular porosity provided by dressed counterions, when dynamical measurements are used for the determination of the structural characteristics of ionic soft colloids even in dilute suspensions.

Hong, Kunlun; Liu, Yun; Porcar, Lionel; Liu, Dazhi; Gao, Carrie Y.; Smith, Gregory S.; Herwig, Kenneth W.; Cai, Sheng; Li, Xin; Wu, Bin; Chen, Wei-Ren; Liu, Li

2012-02-01

320

Structural response of polyelectrolyte dendrimer towards molecular protonation: the inconsistency revealed by SANS and NMR  

International Nuclear Information System (INIS)

Polyamidoamine (PAMAM) dendrimers and their charged state in deuterium oxide have been investigated with proton pulsed field gradient diffusion nuclear magnetic resonance (PFG-NMR) and small-angle neutron scattering (SANS) techniques. NMR measurements suggest that significant variation of the hydrodynamic radius, calculated by the Stokes-Einstein relation with appropriate surface conditions, is observed upon increasing the molecular protonation. However, a comparative SANS experiment indicates little dependence of the dendrimer global size, in terms of its radius of gyration, on molecular protonation. The inconsistency indicates the necessity of incorporating the effect of molecular interface modification and molecular porosity provided by dressed counterions, when dynamical measurements are used for the determination of the structural characteristics of ionic soft colloids even in dilute suspensions.

321

Aseismic slip and seismogenic coupling along the central San Andreas Fault  

Science.gov (United States)

We use high-resolution Synthetic Aperture Radar- and GPS-derived observations of surface displacements to derive the first probabilistic estimates of fault coupling along the creeping section of the San Andreas Fault, in between the terminations of the 1857 and 1906 magnitude 7.9 earthquakes. Using a fully Bayesian approach enables unequaled resolution and allows us to infer a high probability of significant fault locking along the creeping section. The inferred discreet locked asperities are consistent with evidence for magnitude 6+ earthquakes over the past century in this area and may be associated with the initiation phase of the 1857 earthquake. As creeping segments may be related to the initiation and termination of seismic ruptures, such distribution of locked and creeping asperities highlights the central role of the creeping section on the occurrence of major earthquakes along the San Andreas Fault.

Jolivet, R.; Simons, M.; Agram, P. S.; Duputel, Z.; Shen, Z.-K.

2015-01-01

322

Chemistry and microbiology of a sewage spill in South San Francisco Bay.  

Science.gov (United States)

During September 1979, the breakdown of a waste treatment plant resulted in discharge of 1.5 X 107 m3 of primary- treated sewage into a tributary of South San Francisco Bay. Chemical and microbial changes occurred within the tributary as decomposition and nitrification depleted dissolved oxygen. Associated with anoxia were relatively high concentrations of particulate organic carbon, dissolved CO2, CH4, C2H4, NH4+, and fecal bacteria, and low phytoplankton biomass and photosynthetic oxygen production. South San Francisco Bay experienced only small changes in water quality, presumably because of its large volume and the assimilation of wastes that occurred within the tributary. Water quality improved rapidly in the tributary once normal tertiary treatment resumed. -Authors

Cloern, J.E.; Oremland, R.S.

1983-01-01

323

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

324

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

325

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

326

Near-Surface Structure of the Peninsula Segment of the San Andreas Fault, San Francisco Bay Area, California  

Science.gov (United States)

The peninsula segment of the San Andreas Fault (SAF) is a section of the fault that has the potential to produce the next large earthquake in the San Francisco Bay Area, yet the slip history of the peninsula segment is relatively unknown. In most places, the surface location of the SAF has been determined primarily on the basis of geomorphic features and from mapping surface ruptures associated with the 1906 M7.9 San Francisco earthquake. To more precisely locate traces of the SAF along the San Francisco peninsula in the subsurface, we acquired a high-resolution seismic imaging survey, using both seismic refraction and reflection profiling, south of Upper Crystal Springs Reservoir near Woodside, California in June 2012. We acquired coincident P- and S-wave data using a 60-channel seismograph system connected via cable to 40-Hz vertical-component and 4-Hz horizontal-component geophones, with spacing at 1-m intervals along a 60-m-long transect across the SAF. Seismic sources (shots) were generated by hammer impacts on a steel plate or aluminum block at each geophone location. All shots were recorded on all channels. This survey design permitted simultaneous acquisition of reflection and refraction data such that both refraction tomography and reflection images were developed. Analysis of the P- and S-wave data, using refraction tomography, shows abrupt variations in the P-wave (Vp) and S-wave (Vs) velocities, including the 1,500 m/s velocity contour that outlines the top to groundwater and images of Vp/Vs and Poisson's ratios. P-wave velocities range from about 700 m/s at the surface to more than 4000 m/s at 20-m depth. S-wave velocities range from about 300 m/s at the surface to about 800 m/s at 20-m depth. The combined data indicate that the near-surface trace of the SAF dips steeply to the southwest in the upper few tens of meters. Variations in the velocity images also suggest the possibility of two additional near-surface fault traces within about 25 m of the main 1906 fault zone. An unmigrated reflection image displays diffraction hyperbolae that are consistent with fault traces inferred from other images. These data aid ongoing paleoseismological investigations along the SAF because the seismic data precisely locate the main fault trace and auxiliary faults that may contribute to the earthquake hazards associated with the fault zone. Furthermore, the seismic images provide insights into near-surface fault structure and P- and S-wave velocities, which can be important in understanding strong shaking resulting from future earthquakes along this segment of the SAF.

Rosa, C.; Catchings, R.; Rymer, M. J.; Goldman, M.; Grove, K.; Prentice, C. S.

2013-12-01

327

Proprietes optiques lineaires et non-lineaires de nanocomposites metal/dielectrique anisotropes  

Science.gov (United States)

In this thesis, we present the development and the analysis of advanced fabrication techniques allowing for the precise control of the synthesis of nanocomposites formed of gold nanoparticles embedded in a silica matrix. We have developed a three-step technique allowing us to fabricate nanocomposite films with particles of controlled size and shape. (1) The first paper describes the sample fabrication method and their linear optical properties. The nanocomposite materials are first deposited using a PECVD/sputtering hybrid technique. In order to increase the nanoparticule size, the sample are then submitted to a 900°C thermal annealing for several hours. The modification technique used to change the particles from spheres to ellipsoids is described. This technique consists of irradiating the samples using high energy copper ions (30 MeV). The resulting structure is anisotropic since the particles' long axis are aligned with the irradiation direction. This is the first use of this technique for samples with gold particles embedded in a solid matrix. The details of the ellipsometric and spectrophotometric characterization are discussed and the linear optical properties of these materials measured by these techniques are presented. These measurements allow one to find the nanostructural parameters of the layer (gold concentration, particle size, thickness and surface roughness) from the complex refractive index of the layer. We demonstrate the effect of the annealing and the irradiation on the optical properties of the nanocomposite system notably on the control of the characteristics of the SPR absorption band. Thus, we show that the thermal annealing induce a red-shift in the SPR position while the irradiation step corresponds to a blue-shift. We also demonstrate that a final post-irradiation annealing treatment allows to re-form spherical nanoparticles. (2) The second paper is focused on the nonlinear optical properties of Au/SiO2 nanocomposites. Polarized P-Scan et Z-Scan techniques adapted for the measurements of anisotropic samples are described. The P-Scan technique linearity in the context of high power measurements of nanocomposite samples is discussed by comparing several models (model of saturable absorption, correction for linear absorption, correction for linear and nonlinear absorption). Isotropic (spheres) and anisotropic (nanoellipsoids) nanocomposite samples were measured by the Z-Scan and P-Scan techniques. The measurements of isotropic samples yield a nonlinear absorption coefficient value of --4.8x10 -2 cm/W while the measurements of the nonlinear absorption coefficient of anisotropic samples yield values ranging between --0.9x10 -2 cm/W and --3.0x10-2 cm/W depending on the polarization direction of the measurement light. This change in polarization corresponds to a variation of the excitation of the nanoellipsoids short and long axes. Using a simple geometrical model, we show that the nonlinear absorption coefficient measured for a polarization along the ellipsoids short or long axis is equal respectively to --0.9x10-2 cm/W and --5.1x10-2 cm/W. (3) The third paper deals with improvements to the currently used model for the nonlinear response of nanocomposite samples. These modifications allows one to model high metal concentration samples and/or samples containing anisotropic particles. The introduction of the depolarization factor in the calculation of the effective nonlinear susceptibility of nanocomposites from the generalized Maxwell-Garnett equation allows for the addition of a parameter which depends on the geometry of the nanoparticles. The modified model for high gold concentration is compared to the traditional model. We show that the use of the modified model is of prime importance for gold volume fractions exceeding 1%. The effect of each parameter of the model is evaluated and discussed (metal concentration, metal dielectric constant, matrix dielectric constant, metal nonlinear susceptibility). We demonstrate that each fabrication parameter must be carefully choosen as a function of the par

Lamarre, Jean-Michel

328

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

329

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 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

330

El Paleoalto Cretáceo de San Juan de Ríoseco El Paleoalto Cretáceo de San Juan de Ríoseco  

Directory of Open Access Journals (Sweden)

Full Text Available Al Occidente de Cundinamarca, hay un gran Sinclinal de dirección Norte-Sur cuya estratigrafía es completamente diferente a la del centro y Oriente de dicho departamento. El Cretáceo de dicha estructura, presenta características similares a las de la Formación Yaví descrita en el Sur del Tolima y el Hulla.  En san Juan de Ríoseco parece presentarse un Paleoalto, con sedimentación continental, ilimitado por grandes fallas de rumbo al Este y oeste de la estructura mencionada. In the Western part of Cundlnamarca there is a large North-South synclinal structure with a completely different stratigraphy than that of the Central and Eastern portions of Cundinamarca.  The Cretaceous of this structure has characteristics similar to those of the Yaví Formation of Southern Tolima and Huila.  There seems to be a paleo-high in San Juan de Ríoseco, with continental sedimentation, limited by great faults on both the Eastern and Western extremes of the structure.

Galvis Jaime

1990-12-01

331

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

332

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

Scientific Electronic Library Online (English)

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). 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

333

A biomarker study using mussels deployed in San Diego Bay  

Energy Technology Data Exchange (ETDEWEB)

In the summer of 1995 a comprehensive assessment of the extent and consequences of marine environmental contamination in the area of Naval Station San diego was conducted. The study addressed contamination sources, distributions, concentrations, transport, sediment-water exchange, biological effects, and degradation. The biological effects portion of the study included contaminant bioaccumulation, growth, and biomarker measurements, in mussels deployed at six stations around the Naval Station. The mussels were deployed for {approximately} 30 days in plastic mesh bags, placed 1 meter above the bottom. To reduce variability the mussels for the study were initially sorted within an extremely narrow size range, 37.8 {+-} 0.6 mm. DNA damage as measured using the comet assay, and tissue levels of stress proteins hsp 60 and hsp 70, were the biomarkers measured. In addition, mussel tissue extracts were applied to the P450 (CYP1A1) reporter gene system. Stress related biological effects increased in relation to sediment contaminants at all but one station. Evidence from this study and an earlier 1993 study suggests that the non-sediment associated effects observed at one station may be the result of PAH photoactivation of accumulated PAHs.

Steinert, S.; Montee, R.S. [Computer Sciences Corp., San Diego, CA (United States). Marine Sciences Dept.; Chadwick, B.; Leather, J. [NCCOSC, San Diego, CA (United States); Sanders, B. [California State Univ., Long Beach, CA (United States)] Salazar, M. [NOAA, Seattle, WA (United States); Salazar, S. [EVS Consultants, Seattle, WA (United States); Anderson, J. [Columbia Analytical Services, Carlsbad, CA (United States)

1995-12-31

334

76 FR 15216 - Security Zones; Cruise Ships, Port of San Diego, CA  

Science.gov (United States)

...Port of San Diego, California, by providing a common...Port of San Diego, California in the Federal Register...United States and its people. The size of the zones...anchor in San Diego Bay within a 100-yard...Port of San Diego, California. * * * * * (b)...

2011-03-21

335

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

336

Some factors regulating the striped bass population in the Sacramento--San Joaquin Estuary, California  

International Nuclear Information System (INIS)

The abundance of young and adult striped bass (Morone saxatilis) in the Sacramento--San Joaquin Estuary is related to the magnitudes of water diversions and of water flows in the estuary. Principal variations in survival occur during the first two months of life. Density-independent mortality caused by the loss of young bass in water diversions is a major factor regulating population size. Population size also is directly related to flow rates, which serve to control the transport of young bass to suitable nursery areas, which in turn influence survival through factors such as food availability

337

Melting of San Carlos olivine in the presence of carbon at 6-12 GPa  

CERN Document Server

Experiments at 6-12 GPa showed that San Carlos olivine surrounded by carbon melts incongruently at 1400 C and higher temperatures, producing olivine with lower Fe contents, pyroxene, carbide, and carbonate melt. The relatively low melting temperature of 1400 C, independent of pressure, is consistent with carbonate melting. The new evidence for the reduced stability of olivine at high temperatures in the presence of carbonate melts is consistent with geophysical observations, and results in a substantially improved agreement between the experimentally determined phase relations and the observed seismic velocity structure of the upper mantle.

Garai, J; Garai, Jozsef; Gasparik, Tibor

2003-01-01

338

The San Fernando Observatory video Stokes polarimeter  

Science.gov (United States)

A study was conducted to determine the suitability of the San Fernando Observatory's 61 cm (24 inch) aperture vacuum solar telescope and 3 m (118 inch) focal length vacuum spectroheliograph for Stokes Polarimetry measurements. The polarization characteristics of these two instruments was measured by determining their Mueller matrices as a function of telescope orientation, field angle, wavelength, grating type, and position of the measuring beam in the telescope entrance window. In general, the polarizing and depolarizing properties are small so that inversion of the system Mueller matrix will permit the accurate measurement of Stokes profiles for vector magnetic field determination. A proposed polarimeter design based on the use of a TV camera system to simultaneously scan six different polarization components of a given line profile is described. This design, which uses no rotating optics or electronic modulators and makes efficient use of the available irradiance, promises to yield high quality vector magnetograms.

Richter, P. H.; Zeldin, L. K.; Loftin, T. A.

1985-01-01

339

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

340

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

341

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

342

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

343

San Andreas Fault in the Carrizo Plain  

Science.gov (United States)

The 1,200-kilometer (800-mile)San Andreas is the longest fault in California and one of the longest in North America. This perspective view of a portion of the fault was generated using data from the Shuttle Radar Topography Mission (SRTM), which flew on NASA's Space Shuttle last February, and an enhanced, true-color Landsat satellite image. The view shown looks southeast along the San Andreas where it cuts along the base of the mountains in the Temblor Range near Bakersfield. The fault is the distinctively linear feature to the right of the mountains. To the left of the range is a portion of the agriculturally rich San Joaquin Valley. In the background is the snow-capped peak of Mt. Pinos at an elevation of 2,692 meters (8,831 feet). The complex topography in the area is some of the most spectacular along the course of the fault. To the right of the fault is the famous Carrizo Plain. Dry conditions on the plain have helped preserve the surface trace of the fault, which is scrutinized by both amateur and professional geologists. In 1857, one of the largest earthquakes ever recorded in the United States occurred just north of the Carrizo Plain. With an estimated magnitude of 8.0, the quake severely shook buildings in Los Angeles, caused significant surface rupture along a 350-kilometer (220-mile) segment of the fault, and was felt as far away as Las Vegas, Nev. This portion of the San Andreas is an important area of study for seismologists. For visualization purposes, topographic heights displayed in this image are exaggerated two times.The elevation data used in this image was acquired by SRTM aboard the Space Shuttle Endeavour, launched on February 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on Endeavour in 1994. SRTM was designed to collect three-dimensional measurements of Earth's land surface. To collect the 3-D SRTM data, engineers added a mast 60 meters (about 200 feet) long, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between the NASA, the National Imagery and Mapping Agency (NIMA) of the U.S. Department of Defense, and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif, for NASA's Earth Science Enterprise, Washington, D.C. JPL is a division of the California Institute of Technology in Pasadena.Distance to Horizon: 73 kilometers (45.3 miles) Location: 35.42 deg. North lat., 119.5 deg. West lon. View: Toward the Southeast Date Acquired: February 16, 2000 SRTM, December 14, 1984 Landsat Image: NASA/JPL/NIMA

2000-01-01

344

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.

345

Factors Controlling Tidal Flat Morphology in South San Francisco Bay  

Science.gov (United States)

Since the 1850's, the San Francisco Bay has been subjected to a wide array of human-induced change. From the time of the first US Coast and Geodetic Survey bathymetric surveys in 1858, the saltmarshes and mudflats of South San Francisco Bay (SSFB) have decreased in area by 80% and 40%, respectively. Much of the saltmarsh loss was due to salt pond leveeing, while mudflat loss can be related to lack of sediment input, wind-wave erosion, and sea level rise. Plans for marsh restoration include breaching of salt pond levees with the goal of restoring the 15,100 acres of acquired ponds to tidal marsh the largest such restoration in the western US. The effect this would have upon the adjacent mudflats is unclear. In this analysis, the tidal flats of SSFB are broken into geographically similar regions and multiple cross-sections are drawn from mean high water to below mean lower low water at close intervals, allowing for a mean tidal flat bathymetric profile to be determined for each segment and for each time period 1858, 1898, 1931, 1956, 1983, 2005. Eigenfunction analysis is used to separate the spatial and temporal changes in profile shape into the dominant components of variability, allowing evaluation of the behavior of mudflats relative to spatially and temporally-varying forcings. The components of bathymetric variability derived from objective statistical analysis are compared to theoretical models for tidal flat profiles as a function of waves, tides and sediment supply. Theoretical models predict that wave-dominated or sediment-starved flats tend to have concave-upwards bathymetric profiles, whereas tide-dominated or accretionary flats tend to have convex-upwards bathymetric profiles. Initial results from an analysis of the 1980's bathymetry data suggest the South Bay mudflats can be broken into three morphologically distinct sections: 1) concave-up, erosional mudflats in the Eastern zone, which is most subject to wind waves; 2) convex-up, accretionary flats in the Southern zone, south of the Dumbarton Bridge, and 3) concave-up flats with mounding on the seaward edge on the western shore. Up to this point, more research has been focused on the response of saltmarsh to reclamation or restoration; very little attention has been paid to the accompanying change in mudflat shape and sediment character. These data allow for a look at morphologic changes of muddy shores on a multi-decadal timescale, and should prove useful to managers in determining which mudflats would respond most favorably to levee breaching and saltmarsh restoration.

Bearman, J. A.; Foxgrover, A.; Friedrichs, C.; Jaffe, B.

2006-12-01

346

Nondestructive testing of high-temperature alloys by small angle neutron scattering (SANS)  

International Nuclear Information System (INIS)

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, ?'-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.)

347

Reconnaissance of geothermal resources near US naval facilities in the San Diego area, California  

Energy Technology Data Exchange (ETDEWEB)

A reconnaissance study has found little evidence of potential geothermal resources useful at naval facilities in the greater San Diego metropolitan area. However, there is a zone of modest elevated water well temperatures and slightly elevated thermal gradients that may include the eastern portion of the Imperial Beach Naval Air Station south of San Diego Bay. An increase of 0.3/sup 0/ to 0.4/sup 0/F/100 ft over the regional thermal gradient of 1.56/sup 0/F/100 ft was conservatively calculated for this zone. The thermal gradient can be used to predict 150/sup 0/F temperatures at a depth of approximately 4000 ft. This zone of greatest potential for a viable geothermal resource lies within a negative gravity anomaly thought to be caused by a tensionally developed graben, approximately centered over the San Diego Bay. Water well production in this zone is good to high, with 300 gpm often quoted as common for wells in this area. The concentration of total dissolved solids (TDS) in the deeper wells in this zone is relatively high due to intrusion of sea water. Productive geothermal wells may have to be drilled to depths economically infeasible for development of the resource in the area of discussion.

Youngs, L.G.

1984-01-01

348

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

349

Paleo-Environmental Change in the San Francisco Estuary Using Marsh Vegetation Records  

Science.gov (United States)

Stable carbon isotopes, fossil pollen and stratigraphic analyses are used to reconstruct the paleo-environmental history of the San Francisco Bay Estuary. Research sites were selected along a salinity gradient spanning the northern reaches of the Estuary, from the west end of San Pablo Bay to the mouth of the Sacramento-San Joaquin Delta. We collected sediment cores from tidal marshes which contain the history of marsh development in the accumulated sediments. The results presented here demonstrate a strong and consistent correspondence between periods of increased salinity in the Estuary and changes in the local marsh vegetation. In particular, the vegetation has responded rapidly to the changing environmental conditions of the last century. These recent changes can be attributed to extreme El Nino events in the 1980s, and to human modifications of regional hydrology. Earlier periods of high salinity in the Estuary have been detected in the combined records from brackish marsh sites, occurring at ca. 875 cal. yr. B.P. and 1225 cal. yr. B.P. Conditions at our sites were considerably fresher preceding European contact approximately 150 years ago. Changes in the sediment cores from some sites also indicate possible tectonic activity occurring circa 1700 cal. yr. B.P. and 1300 cal. yr. B.P. Sedimentation rates from dated cores suggest sea level rose at an average rate of 1.5 mm/year, significantly less than predicted rates under global warming. Rising sea level poses a serious threat to local wetlands both through loss of habitat and high salinity. Land use and water use management around the San Francisco Bay must consider options for protecting local marshes and preserving species diversity. Research such as is presented here can help assess the sedimentation rates of local marshes as well as their relative robustness.

Malamud-Roam, F. P.; Ingram, L.

2001-12-01

350

Vertical crustal movements preceding and accompanying the San Fernando earthquake of February 9, 1971: A summary  

Science.gov (United States)

Comparative elevations referred chiefly to a tidal bench mark with a history of relatively positive movement show that much of the Transverse Ranges of southern California sustained major changes in elevation both before and in association with the ML 6.4 San Fernando earthquake of February 9, 1971. Preseismic changes in elevation in the southern Transverse Ranges were almost uniformly positive and generally episodic. Maximum uplift measured between 1960/61 and 1968/69 was 0.205 m (observed) or 0.200 m (adjusted); it occurred about 30 km northeast of the 1971 epicenter. As much as 0.129 m (observed) of preseismic uplift was also measured about 30 km northwest of the epicenter between 1964 and 1968. A comparison between 1968 and 1969 elevation data revealed 0.078 m (observed) of differential uplift centered about 10 km west of the epicenter; earlier leveling indicates that this uplift began between February 1967 and May 1968. Changes in elevation measured during the interval 1968/69-71 (postearthquake) are interpreted as chiefly coseismic and were concentrated along a 15-km ruptured segment of the east-trending, north-dipping San Fernando fault. These changes were characterized by subsidence of as much as 0.111 m (observed) or 0.092 m (adjusted) south of the fault and a ridge of uplift of up to at least 2.195 m (observed) or 2.196 m (adjusted) immediately north of the fault. The more episodic preseismic movements are interpretable as deep-seated creep events on the San Fernando fault. Alternatively, these episodic movements may be due partly to the operation of dilatancy; the onset of the 1968-1969 epicentral uplift accords closely with the initiation of a Vp Vs anomaly recognized in this same area. The 1968/69-71 elevation changes can be attributed almost entirely to slip on the San Fernando fault. ?? 1975.

Castle, R.O.; Church, J.P.; Elliott, M.R.; Morrison, N.L.

1975-01-01

351

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

352

Migrating tremors illuminate complex deformation beneath the seismogenic San Andreas fault.  

Science.gov (United States)

The San Andreas fault is one of the most extensively studied faults in the world, yet its physical character and deformation mode beneath the relatively shallow earthquake-generating portion remain largely unconstrained. Tectonic 'non-volcanic' tremor, a recently discovered seismic signal probably generated by shear slip on the deep extension of some major faults, can provide new insight into the deep fate of such faults, including that of the San Andreas fault near Parkfield, California. Here I examine continuous seismic data from mid-2001 to 2008, identifying tremor and decomposing the signal into different families of activity based on the shape and timing of the waveforms at multiple stations. This approach allows differentiation between activities from nearby patches of the deep fault and begins to unveil rich and complex patterns of tremor occurrence. I find that tremor exhibits nearly continuous migration, with the most extensive episodes propagating more than 20 kilometres along fault strike at rates of 15-80 kilometres per hour. This suggests that the San Andreas fault remains a localized through-going structure, at least to the base of the crust, in this area. Tremor rates and recurrence behaviour changed markedly in the wake of the 2004 magnitude-6.0 Parkfield earthquake, but these changes were far from uniform within the tremor zone, probably reflecting heterogeneous fault properties and static and dynamic stresses decaying away from the rupture. The systematic recurrence of tremor demonstrated here suggests the potential to monitor detailed time-varying deformation on this portion of the deep San Andreas fault, deformation which unsteadily loads the shallower zone that last ruptured in the 1857 magnitude-7.9 Fort Tejon earthquake. PMID:20130648

Shelly, David R

2010-02-01

353

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

354

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

355

Structural analysis of polymer gel network by SANS  

International Nuclear Information System (INIS)

We analyzed the structure of nanocomposite gels with a unique organic (polymer)/inorganic (clay) network in both its static and deformed states by small angle neutron scattering (SANS) using the contrast variation method. (author)

356

Los claustros del monasterio de San Jerónimo el Real  

Directory of Open Access Journals (Sweden)

Full Text Available The Monastery of San Jerónimo El Real (Madrid had a complex system of four cloisters in Renaissance and Baroque styles. The author studies the history of their construction. The old cloister dates from the beginning of the 16th century. Fray Lorenzo de San Nicolás designed the project for the main and definitive cloister; the construction began in 1672 and was terminated by the end of the century.

El Monasterio de San Jerónimo (Madrid dispuso de un complejo sistema de cuatro claustros del renacimiento y el barroco. El presente trabajo estudia la historia de su construcción. El viejo claustro es de comienzos del XVI. El autor del diseño del claustro principal y definitivo fue fray Lorenzo de San Nicolás. La construcción fue iniciada en 1672 y finalizada con el siglo.

Cadiñanos Bardeci, Inocencio

2007-09-01

357

Merchandising of cigarettes in San Francisco pharmacies: 27 years later  

OpenAIRE

Objective: To estimate changes since 1976 in the proportion of San Francisco pharmacies that sell cigarettes and to characterise the advertising of cigarettes and the merchandising of non-prescription nicotine replacement therapy (NRT) products in these retail establishments.

Eule, B.; Sullivan, M; Schroeder, S.; Hudmon, K.

2004-01-01

358

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

359

Geological literature on the San Joaquin Valley of California  

Science.gov (United States)

The following list of references includes most of the geological literature on the San Joaquin Valley and vicinity in central California (see figure 1) published prior to January 1, 1973. The San Joaquin Valley comprises all or parts of 11 counties -- Alameda, Calaveras, Contra Costa, Fresno, Kern, Kings, Madera, Merced, San Joaquin, Stanislaus, and Tulare (figure 2). As a matter of convenient geographical classification the boundaries of the report area have been drawn along county lines, and to include San Benito and Santa Clara Counties on the west and Mariposa and Tuolumne Counties on the east. Therefore, this list of geological literature includes some publications on the Diablo and Temblor Ranges on the west, the Tehachapi Mountains and Mojave Desert on the south, and the Sierra Nevada Foothills and Mountains on the east.

Maher, J.C.; Trollman, W.M.; Denman, J.M.

1973-01-01

360

Xeiras heráldicas: igrexa de San Fiz de Asma  

Directory of Open Access Journals (Sweden)

Full Text Available There are studied and analyze the historical and heraldic testimonies of the church of San Fiz de Asma (Chantada. Lugo, contributing documentary base for their correct identification

No disponible

Otero Piñeyro Maseda, Pablo S.

2007-12-01

361

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

362

27 CFR 9.130 - San Ysidro District.  

Science.gov (United States)

...seasonal pond on the San Felipe, Calif., U.S.G.S. map; (10) The boundary follows the unimproved road to Bench Mark 160 at Highway 152. (11) The boundary then follows Highway 152 in a northwesterly direction across the...

2010-04-01

363

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

364

Size-based Data Placement Strategy in SAN  

OpenAIRE

This paper introduced an even data distribution strategy in SAN. Even data distribution is always the target of distributed storage design. Many articles dedicate the purpose. We use size-based data placement here to guarantee the data distributed evenly at furthest. Size-based data distribution separates the SAN into zones, and each zone has some storage devices (SD), different sized data will fill into different zones. Two kind of allocating algorithms are used to keep the data distribute e...

Yihua Lan; Yong Zhang; Haozheng Ren

2013-01-01

365

Evaluation of different SAN Technologies for virtual machine hosting  

OpenAIRE

This thesis covers a problem which companies faces every day: Finding a Storage Area Network(SAN) solution that tackles the rising demands from users and their software and when working with virtualization environments. In this paper it will be showed a way to investigate and identify, from a selection of SAN technologies, which is the most efficient and optimal based on scenarios that fits real life experiences. The approach taken was to create an experimental setup in a controlled environme...

Lunden, Christian

2009-01-01

366

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

367

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

368

Inter-mineral Iron Isotope Fractionation in San Carlos Xenoliths  

Science.gov (United States)

Iron isotopic compositions of mantle minerals may provide a powerful tracer for geochemical processes in the mantle such as partial melting, metasomatism, and oxidation. The current database for iron isotope compositions of mantle olivine, clinopyroxene, orthopyroxene, and spinel, is highly variable and lacking in systematics. The variability may be due in part to the intrinsic petrologic variability inherent in widely used sample localities. To address this, we are studying inter-mineral iron isotopic fractionation of minerals from the well-characterized mantle xenoliths of San Carlos, Arizona, in order to better understand high- temperature iron fractionation and harness its potential use as a geochemical tracer. We present preliminary iron-isotope data for minerals from a typical Type I San Carlos xenolith, CEM1-3, a spinel lherzolite. After the purity of the mineral separates was guaranteed by checking the composition of each grain on a scanning electron microscope, the samples were dissolved in a Parr bomb at 240° C. Iron was extracted and purified by anionic exchange chromatography, and isotope measurements were carried out by MC-ICPMS. Iron isotope compositions are reported relative to IRMM-14. No resolvable iron isotopic fractionation is observed between olivine (Ol, molar Fe# = 0.112, 62 vol%) and orthopyroxene (Opx, Fe# = 0.108, 24 vol%), which together make up approximately 86% of this xenolith. There is, however, significant iron isotope fractionation between these two minerals and clinopyroxene. Cpx (Fe# = 0.114, 13 vol%) is ~0.08± 0.037 per mil greater in 57Fe/54Fe than coexisting Ol and Opx . This observation agrees with Mg isotope data from the same xenolith (Young et al., this meeting), suggesting that the clinopyroxene is out of equilibrium with the rest of the rock. This is most likely the result of partial melting and/or metasomatism by a liquid/fluid phase. Additional data on spinel (<1 vol%) from this xenolith will offer further insights in the temperature and melt-rock interaction at this locality.

Macris, C. A.; Young, E. D.; Manning, C. E.; Schauble, E. A.; Tonui, E.

2008-12-01

369

Fracture surface energy of the Punchbowl fault, San Andreas system.  

Science.gov (United States)

Fracture energy is a form of latent heat required to create an earthquake rupture surface and is related to parameters governing rupture propagation and processes of slip weakening. Fracture energy has been estimated from seismological and experimental rock deformation data, yet its magnitude, mechanisms of rupture surface formation and processes leading to slip weakening are not well defined. Here we quantify structural observations of the Punchbowl fault, a large-displacement exhumed fault in the San Andreas fault system, and show that the energy required to create the fracture surface area in the fault is about 300 times greater than seismological estimates would predict for a single large earthquake. If fracture energy is attributed entirely to the production of fracture surfaces, then all of the fracture surface area in the Punchbowl fault could have been produced by earthquake displacements totalling <1 km. But this would only account for a small fraction of the total energy budget, and therefore additional processes probably contributed to slip weakening during earthquake rupture. PMID:16136142

Chester, Judith S; Chester, Frederick M; Kronenberg, Andreas K

2005-09-01

370

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

371

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

372

78 FR 72025 - Security Zones; Naval Base Point Loma; Naval Mine Anti Submarine Warfare Command; San Diego Bay...  

Science.gov (United States)

...safety or security of people, places or vessels...Point Loma; San Diego Bay, CA. (a) Location...Point Loma, San Diego, California; Designated Representative...Warfare Command; San Diego Bay, San Diego, CA...Point Loma, San Diego, California; Designated...

2013-12-02

373

Recalibrated turbulence profiles at San Pedro Mártir  

Scientific Electronic Library Online (English)

Full Text Available La calibración de perfiles de turbulencia óptica medidos con el método SCIDAR generalizado ha sido recientemente revisada y corregida por Avila & Cuevas (2009). Basándonos en ese trabajo, aquí presentamos la corrección de todos los [...] perfiles de medidos con el SCIDAR generalizado en el Observatorio Astronómico Nacional de San Pedro Mártir. El perfil de mediano corregido conserva su estructura vertical general. El cociente promediado en altura de la mediana de los valores de corregidos sobre la mediana de los valores no corregidos es igual a 0.87. La mediana del seeing corregido en el sitio es 0.''68 ± 0."03. 4.2% menor que la mediana no corregida. Las medianas del seeing producido por turbulencia en los dos primeros kilómetros de altura sobre los telescopios de 1.5 m y 2.1 m de diámetro decrecen en un 15.8% y 13.6%, respectivamente. El ángulo isoplanático corregido tiene una mediana de 1."96 ± 0.''04. Abstract in english The calibration of optical turbulence profiles measured with the generalized SCIDAR technique has been recently reviewed and corrected by Avila & Cuevas (2009). Based on that work, here we present the correction of all the [...] er=0 src="../../../../../img/revistas/rmaa/v47n1/a6e1.jpg">profiles measured with a generalized SCIDAR at the Observatorio Astronómico Nacional of San Pedro Mártir. The median corrected profile conserves its overall vertical shape. The altitude-averaged ratio of the corrected median values over the uncorrected ones equals 0.87. The corrected median value of seeing at the site is 0.''68 ± 0."03, 4.2% lower than the median value obtained with the uncorrected profiles. The median values of the seeing produced by turbulence in the first 2 km above the 1.5 m and the 2.1 m telescopes decrease by 15.8% and 13.6%, respectively. The corrected isoplanatic angle has a median value of 1."96 ± 0."04.

R., Avila; L. J., Sánchez; I., Cruz-González; E., Carrasco; V. M, Castaño.

2011-04-01

374

El derecho de autor en San Luis Potosí; una aproximación / Author's Right in San Luis Potosí; an approach  

Scientific Electronic Library Online (English)

Full Text Available Se exponen los primeros antecedentes históricos del derecho de autor en el ámbito internacional con orientación a su desarrollo y posterior tratamiento jurídico en México y en San Luis Potosí. [...] Abstract in english It explains the historical early background of the "Author's Law" or "Author's Right" (Copyright Law) on the internatonal scope oriented toward its development and later legal treatment in Mexico and San Luis Potosí. [...

Agustín, Gutiérrez García; Agustín, Gutiérrez Chiñas.

2011-08-01

375

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

376

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)

377

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

378

Mercury in San Francisco Bay forage fish  

Energy Technology Data Exchange (ETDEWEB)

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 {mu}g g{sup -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.

Greenfield, Ben K., E-mail: ben@sfei.or [San Francisco Estuary Institute, 7770 Pardee Lane, Oakland, CA 94621 (United States); Jahn, Andrew, E-mail: andyjahn@mac.co [1000 Riverside Drive, Ukiah, CA 95482 (United States)

2010-08-15

379

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

380

Crustal deformation along the San Andreas, California  

Science.gov (United States)

The goal is to achieve a better understanding of the regional and local deformation and crustal straining processes in western North America, particularly the effects of the San Andreas and nearby faults on the spatial and temporal crustal deformation behavior. Construction of theoretical models based on the mechanics of coupled elastic plate, viscoelastic foundation and large scale crack mechanics provide a rational basis for the interpretation of seismic and aseismic anomalies and expedite efforts in forecasting the stability of plate boundary deformation. Special focus is placed on the three dimensional time dependent surface deformation due to localized slippage in a elastic layer coupled to a visco-elastic substrate. The numerical analysis is based on a 3-D boundary element technique. Extension to visco-elastic coupling demands the derivation of 3-D time dependent Green's function. This method was applied to analyze the viscoelastic surface displacements due to a dislocated embedded patch. Surface uplift as a function of time and position are obtained. Comparisons between surface uplift for long and short dislocated patches are made.

Li, Victor C.

1992-01-01

381

The San Pedro Mártir Transit Observations Program  

Science.gov (United States)

In the framework of the TAOS-II project, aimed at the observation of small-size Kuiper Belt Object occultations, we present the first transit observation program carried on using the facilities of the San Pedro Mártir Observatory (Baja California, Mexico).The involved telescopes consist in a traditional 84cm telescope, a robotic 1.5m, and a traditional 2.12m. The project consist in validating the possibility to use these facilities to observe known Hot Jupiters, in order to set up a follow-up strategy for specific TAOS-II alerts.15 exoplanetary transits were successfully observed in 2014, in several photometric bands (U, V, R, r, and i).We present a panoramic of the project and the results of the fit of first two objects, WASP-39 and WASP-43, which are also the subject of a manuscript in preparation.Moreover, we are exploring 3D ray tracing models to model the system basing on our results, using the software SHAPE.

Ricci, Davide; Rámon Fox, Gerardo; Ayala, Carmen; Navarro, Samuel; Brown Sevilla, Samantha; Fox Machado, Lester; Curiel, Salvador; Michel, Raul; Reyes, Mauricio

2014-11-01

382

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

383

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 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

384

A history of intertidal flat area in south San Francisco Bay, California: 1858 to 2005  

Science.gov (United States)

A key question in salt pond restoration in South San Francisco Bay is whether sediment sinks created by opening ponds will result in the loss of intertidal flats. Analyses of a series of bathymetric surveys of South San Francisco Bay made from 1858 to 2005 reveal changes in intertidal flat area in both space and time that can be used to better understand the pre-restoration system. This analysis also documents baseline conditions of intertidal flats that may be altered by restoration efforts. From 1858 to 2005, intertidal flat area decreased by about 25% from 69.2 +6.4/-7.6 km2 to 51.2 +4.8/-5.8 km2. Intertidal flats in the north tended to decrease in area during the period of this study whereas those south of Dumbarton Bridge were either stable or increased in area. From 1983 to 2005, intertidal flats south of Dumbarton Bridge increased from 17.6 +1.7/-2.5 km2 to 24.2 +1.0/-1.8 km2. Intertidal flats along the east shore of the bay tended to be more erosional and decreased in area while those along the west shore of the bay did not significantly change in area. Loss of intertidal flats occurred intermittently along the eastern shore of the bay north of the Dumbarton Bridge. There was little or no loss from 1931 to 1956 and from 1983 to 2005. Predictions of future change in intertidal flat area that do not account for this spatial and temporal variability are not likely to be accurate. The causes of the spatial and temporal variability in intertidal flat area in South San Francisco Bay are not fully understood, but appear related to energy available to erode sediments, sediment redistribution from north to south in the bay, and sediment available to deposit on the flats. Improved understanding of sediment input to South San Francisco Bay, especially from Central Bay, how it is likely to change in the future, the redistribution of sediment within the bay, and ultimately its effect on intertidal flat area would aid in the management of restoration of South San Francisco Bay salt ponds.

Jaffe, Bruce; Foxgrover, Amy

2006-01-01

385

The slow recovery of San Francisco Bay from the legacy of organochlorine pesticides.  

Science.gov (United States)

The use of organochlorine pesticides, including DDTs, chlordanes, and dieldrin, peaked in San Francisco Bay's watershed 30-40 years ago, yet residues of the pesticides remain high. Known as legacy pesticides for their persistence in the Bay decades after their uses ended, the compounds and their breakdown products occur at concentrations high enough to contribute to advisories against the consumption of sport fish from the Bay. Combined with other data sets, the long-term monitoring data collected by the San Francisco Estuary Regional Monitoring Program (RMP) for trace substances allow us to track recovery of the Bay from these inputs and predict its future improvement. Legacy pesticides enter the water and sediment of San Francisco Bay from a variety of sources, including runoff from California's Central Valley and local watersheds, municipal and industrial wastewater, atmospheric deposition, erosion of historically contaminated sediment deposits, and dredging and disposal of dredged material. Runoff from small-urbanized tributaries may contribute as much or more to the loads than runoff from the agricultural Central Valley, even though 90 percent of the freshwater flow comes from the Central Valley via the Sacramento and San Joaquin rivers. The fates of legacy pesticides in San Francisco Bay are controlled by their chemical properties, including their solubilities and partition coefficients. Degradation in the sediments, outflow through the Golden Gate, and volatilization-in that relative order-result in removal of pesticides from the Bay. A contaminant fate model was used to estimate recovery times of the Bay under various scenarios. For example, under a scenario in which no new legacy pesticides entered the Bay, model predictions suggested that concentrations of pesticides in the water and the active sediment layer would reach risk-reduction goals within one to three decades. Under scenarios of continued inputs to the Bay, recovery time would be considerably longer or not reached at all. Long-term tissue monitoring corroborates model predictions of slow declines in DDT and chlordane concentrations. Field-transplanted bivalve samples indicate declines since 1980, and lipid-weight concentrations of pesticides have declined in fishes, but the declines are slow. The critical management question for the Bay is whether there are feasible management actions that would decrease concentrations in sport fish significantly faster than the existing slow progress that has been observed. PMID:16930588

Connor, Michael S; Davis, Jay A; Leatherbarrow, Jon; Greenfield, Ben K; Gunther, Andrew; Hardin, Dane; Mumley, Thomas; Oram, John J; Werme, Christine

2007-09-01

386

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

387

Impulsive radon emanation on a creeping segment of the San Andreas fault, California  

International Nuclear Information System (INIS)

Radon emanation was continuously monitored for several months at two locations along a creeping segment of the San Andreas fault in central California. The recorded emanations showed several impulsive increases that lasted as much as five hours with amplitudes considerably larger than meteorologically induced diurnal variations. Some of the radon increases were accompanied or followed by earthquakes or fault-creep events. They were possibly the result of some sudden outbursts of relatively radon-rich ground gas, sometimes triggered by crustal deformation or vibration. (Auth.)

388

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 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

389

Structure of the San Bernardino Basin Along Two Seismic Transects: Rialto-Colton Fault to the San Andreas Fault and Along the I-215 Freeway (I-10 to SR30)  

Science.gov (United States)

In this report, we present seismic data and acquisition parameters for two seismic profiles acquired in the San Bernardino, California area in May and October 2003. We refer to these seismic profiles as the San Bernardino Regional (SBR) and San Bernardino High-Resolution (SBHR) seismic profiles. We present both un-interpreted and interpreted seismic images so that the structure of the area can independently interpreted by others. We explain the rationale for our interpretations within the text of this report, and in addition, we provide a large body of supporting evidence. The SBR seismic profile extended across the San Bernardino Basin approximately N30?E from the town of Colton to the town of Highland. The data were acquired at night when the signal-to-noise ratios were reasonably good, and for the larger shots, seismic energy propagated across the ~20-km-long array. Tomographic velocity data are available to depths of about 4 km, and low-fold reflection data are available to depths in excess of 5 km. The SBR seismic data reveal an asymmetric, fault-bound basin to about 5 km depth. The SBHR seismic profile trended along the I-215 freeway from its intersection with the Santa Ana River to approximately State Road 30 in San Bernardino. Seismic data acquired along the I-215 freeway provide detailed images, with CDP spacing of approximately 2.5 m along an approximately 8.2-km-long profile; shot and geophone spacing was 5 m. For logistical reasons, the high-resolution (SBHR) seismic data were acquired during daylight hours on the shoulder of the I-215 freeway and within 5 to 10 m of high-traffic volumes, resulting in low signal-to-noise ratios. The limited offset at which refracted first-arrivals could be measured along the SBHR seismic profile limited our measurements of tomographic refraction velocities to relatively shallow (< 150 m) depths. The SBHR reflection data reveal a basin with complex structural details within the upper kilometer. The two seismic profiles show internal consistency and consistency with other existing geophysical data. Collectively, the data suggest that the I-215 freeway trends along the faulted edge of a pull-apart basin, within a zone where the principal slip of the San Jacinto Fault is transferred to the San Andreas Fault. Because the I-215 freeway trends at low angles to these flower-structure faults, both primary and numerous secondary faults are apparent between the I-10 exchange and State Road-30, suggesting that much of the 8-km-long segment of the I-215 freeway could experience movement along primary or secondary faults.

Catchings, R.D.; Rymer, M.J.; Goldman, M.R.; Gandhok, G.; Steedman, C.E.

2008-01-01

390

Abundancia y distribución de las especies ícticas (Osteichthyes del río San Francisco-Cosquín, Córdoba, Argentina Abundance and distribution of fish species (Osteichthyes from San Francisco - Cosquín river in Córdoba, Argentina  

Directory of Open Access Journals (Sweden)

Full Text Available It was made the characterization of the San Francisco-Cosquín Mountain River fish community, Córdoba, Argentina. Samples of fish were taken from selected sites from November 1998 to November 1999. Eleven species were recorded, eight of which are first reports for this river. Relative abundance for each species, species richness, diversity and dominance were estimated. Bryconamericus iheringi (Boulenger, 1887 y Jenynsia multidentata (Jenyns, 1842 were the most abundant.

Andrea Cecilia Hued

391

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

392

La política en San Francisco Oxtotilpan / Politics in San Francisco Oxtotilpan  

Scientific Electronic Library Online (English)

Full Text Available SciELO Mexico | Language: Spanish Abstract in spanish El siguiente texto analiza el proceso político en San Francisco Oxtotilpan, una comunidad indígena en el Estado de México. Para tal caso, se presenta una breve descripción etnográfica de la comunidad, con los rasgos sociales y culturales más importantes seguida por el examen al sistema de cargos rel [...] igiosos de esta comunidad y su relevancia para el proceso político de la misma, ya que una de las principales diferencias entre la política en el mundo indígena y el mundo mestizo es la intervención de una cosmología religiosa en el proceso político. Abstract in english The following text analyzes the political process in San Francisco Oxtotilpan, an Indian community in the State of Mexico. To this effect, it presents a brief ethnographic description of the community, with its social and the most important cultural characteristics followed by an examination of the [...] system for religious appointments and its relevance to the political process of the community, since one of the principle differences between politics in the Indian world and the cross breed is the intervention of a religious cosmology in the political process.

Leif, Korsbaeck.

2011-04-01

393

76 FR 62819 - Notice of Intent To Amend the Resource Management Plan for the San Luis Resource Area, Colorado...  

Science.gov (United States)

...Management (BLM) San Luis Valley Public Lands Center...associated EA for the San Luis Valley Public Lands Center...proposal to amend the San Luis Resource Area (SLRA...address resources in the project area that may be...

2011-10-11

394

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

395

40 CFR 180.1108 - Delta endotoxin of Bacillus thuringiensis variety San Diego encapsulated into killed Pseudomonas...  

Science.gov (United States)

...variety San Diego encapsulated into killed Pseudomonas fluorescens; exemption from the requirement...San Diego encapsulated into killed Pseudomonas fluorescens; exemption from the requirement...San Diego encapsulated into killed Pseudomonas fluorescens is exempt from the...

2010-07-01

396

76 FR 31954 - San Jose Water Company; Notice of Declaration of Intention and Soliciting Comments, Protests, and...  

Science.gov (United States)

...2011. d. Applicant: San Jose Water Company. e. Name of Project...Reducing Valves, in the town of San Jose, Santa Clara County, California. g. Filed Pursuant to: Section...Victorine, Director of Operations, San Jose Water Company, 110 W....

2011-06-02

397

78 FR 40691 - Foreign-Trade Zone 18-San Jose, California; Application for Reorganization (Expansion of Service...  

Science.gov (United States)

...Foreign-Trade Zone 18--San Jose, California; Application for Reorganization...FTZ) Board by the City of San Jose, grantee of Foreign-Trade...service area that includes all of San Jose, California. The applicant is now...

2013-07-08

398

33 CFR 334.960 - Pacific Ocean, San Clemente Island, Calif.; naval danger zone off West Cove.  

Science.gov (United States)

...false Pacific Ocean, San Clemente Island, Calif...Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY...960 Pacific Ocean, San Clemente Island, Calif...Eleventh Naval District, San Diego. [27 FR 6829,...

2010-07-01

399

33 CFR 334.961 - Pacific Ocean, San Clemente Island, California, naval danger zone off the northwest shore.  

Science.gov (United States)

...false Pacific Ocean, San Clemente Island, California...Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY...961 Pacific Ocean, San Clemente Island, California...commander, Naval Base, San Diego, California, and...

2010-07-01

400

33 CFR 334.920 - Pacific Ocean off the east coast of San Clemente Island, Calif.; naval restricted area.  

Science.gov (United States)

...Ocean off the east coast of San Clemente Island, Calif...Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY...Ocean off the east coast of San Clemente Island, Calif...Eleventh Naval District, San Diego, California....

2010-07-01

401

75 FR 71145 - San Joaquin River Restoration Program: Reach 4B, Eastside Bypass, and Mariposa Bypass Channel and...  

Science.gov (United States)

...1) of the Central Valley Project Improvement Act and the San Joaquin River Restoration...the SJRRS Act. San Joaquin River Restoration...States and the Central Valley Project...conditions of the San Joaquin River...

2010-11-22

402

33 CFR 3.55-15 - Sector San Diego Marine Inspection Zone and Captain of the Port Zone.  

Science.gov (United States)

...2010-07-01 false Sector San Diego Marine Inspection Zone... GENERAL COAST GUARD AREAS, DISTRICTS, SECTORS... § 3.55-15 Sector San Diego Marine Inspection Zone...the Port Zone. Sector San Diego's office is located...

2010-07-01

403

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

404

Contaminants of antropic origin in groundwater San Juan (Argentina). Vulnerability and hydro chemical indicators; Contaminantes de origen antropico en aguas subterraneas San Juan (Argentina)  

Energy Technology Data Exchange (ETDEWEB)

The Tulum Valley aquifer vulnerability and its correlation with the behavior of hydro chemical parameters related to new urban neighborhoods and uncontrolled waste disposal are discussed. A high vulnerability to contamination by substances solved in the recharge water at the San Juan river shore is estimated. A fast transport rate due to the high permeability is foreseen, as well as the existence of contamination sources related to waste disposals and populations without a sewer system. The results show that the mentioned populations and waste disposal sites are located at vulnerable zones of the area. A higher concentration of nitrates and nitrites is observed at the Southeast, due to the short permanency period of the water in the system, and to the reconcentration in zones with less permeable levels. (Author) 19 refs.

Fiore, J. M.; Castro, A.; Medici, M. E.; Gimenez, M.; Suero, E.; Turcuman, M. H.

2002-07-01

405

Contemporary vertical uplift and modulation of seismicity due to groundwater removal in the southern San Joaquin Valley of California  

Science.gov (United States)

GPS stations surrounding the southern San Joaquin Valley in California reveal a broad pattern of uplift concentrated along the basin margins. Peak vertical velocities reach values up to 1 - 3 mm/yr in the adjacent central Coast Range and southern Sierra Nevada, relative to the comparatively stable Great Basin to the east. We use a simple elastic model to explore the vertical response to unloading driven by sustained, anthropogenic groundwater depletion in the southern San Joaquin Valley as a possible driver of contemporary uplift. The model uses a line load centered along the valley axis, a range of elastic parameters, and published estimates of the integrated rate of mass loss due to groundwater removal over the last decade. Predicted uplift centered along the valley axis matches well with patterns of GPS motion, with the upward vertical rates decaying away from the valley margins. Observed seasonal variability in the vertical GPS positions lends support for this model, showing peak uplift for stations surrounding the valley during the dry summer and fall months. On the other hand, stations in the San Joaquin Valley show larger seasonal uplift accompanying aquifer recharge during winter months. As a consequence of net uplift in the Coast Range to the west, the San Andreas Fault experiences unclamping, or a reduction in the effective normal stress, given its orientation parallel to the valley axis. Seasonal unloading due to groundwater removal therefore may provide a viable mechanism to explain previously observed peaks in seismicity during dry months along this portion of the fault, and perhaps pushes the fault closer to failure. Our results also suggest that the signal of vertical flexural uplift from groundwater unloading overlaps with the possible signal of modest, contemporary uplift of the southern Sierra Nevada from tectonic and/or mantle flow derived forces. Thus, at least some of the signal previously interpreted as tectonic uplift may be a consequence of human-caused groundwater changes in the adjacent San Joaquin Valley.

Amos, C. B.; Audet, P.; Hammond, W. C.; Burgmann, R.; Johanson, I. A.; Blewitt, G.

2013-12-01

406

Strike-slip fault propagation and linkage via work optimization with application to the San Jacinto fault, California  

Science.gov (United States)

Over multiple earthquake cycles, strike-slip faults link to form through-going structures, as demonstrated by the continuous nature of the mature San Andreas fault system in California relative to the younger and more segmented San Jacinto fault system nearby. Despite its immaturity, the San Jacinto system accommodates between one third and one half of the slip along the boundary between the North American and Pacific plates. It therefore poses a significant seismic threat to southern California. Better understanding of how the San Jacinto system has evolved over geologic time and of current interactions between faults within the system is critical to assessing this seismic hazard accurately. Numerical models are well suited to simulating kilometer-scale processes, but models of fault system development are challenged by the multiple physical mechanisms involved. For example, laboratory experiments on brittle materials show that faults propagate and eventually join (hard-linkage) by both opening-mode and shear failure. In addition, faults interact prior to linkage through stress transfer (soft-linkage). The new algorithm GROW (GRowth by Optimization of Work) accounts for this complex array of behaviors by taking a global approach to fault propagation while adhering to the principals of linear elastic fracture mechanics. This makes GROW a powerful tool for studying fault interactions and fault system development over geologic time. In GROW, faults evolve to minimize the work (or energy) expended during deformation, thereby maximizing the mechanical efficiency of the entire system. Furthermore, the incorporation of both static and dynamic friction allows GROW models to capture fault slip and fault propagation in single earthquakes as well as over consecutive earthquake cycles. GROW models with idealized faults reveal that the initial fault spacing and the applied stress orientation control fault linkage propensity and linkage patterns. These models allow the gains in efficiency provided by both hard-linkage and soft-linkage to be quantified and compared. Specialized models of interactions over the past 1 Ma between the Clark and Coyote Creek faults within the San Jacinto system reveal increasing mechanical efficiency as these fault structures change over time. Alongside this increasing efficiency is an increasing likelihood for single, larger earthquakes that rupture multiple fault segments. These models reinforce the sensitivity of mechanical efficiency to both fault structure and the regional tectonic stress orientation controlled by plate motions and provide insight into how slip may have been partitioned between the San Andreas and San Jacinto systems over the past 1 Ma.

Madden, E. H.; McBeck, J.; Cooke, M. L.

2013-12-01

407

"Why Do You Write Your Name Long Like That?" Language and Literacy in a San Francisco Kindergarten  

OpenAIRE

In this thesis I investigate the role of language awareness in early literacy, and argue that skills acquired when becoming literate can provide resources for manipulating social as well as textual relations. Based on ethnographic research among a group of 5- and 6-year old kindergartners in a San Francisco public school, I describe how the kids' personal names provided them with stable landmarks with which to explore both oral and written language. The capacity of names to facilitate communi...

Helgesen, Espen

2008-01-01

408

FINANCING COMMUNITY FACILITIES: A STUDY OF THE PARKS AND RECREATIONAL GENERAL OBLIGATION BOND MEASURE OF SAN JOSE, CALIFORNIA  

OpenAIRE

This study of the City of San Jose’s Parks and Recreation General Obligation (GO) Bond Measure seeks to identify the politics-, management-, and planning-related lessons learned by the City as it developed its community facilities using the GO bonds proceeds. The study finds that these lessons include: be conservative in what you promise the residents; be prepared for changes in economic environment by identifying supplementary funding sources should the primary source not yield adequate f...

Mathur, Shishir

2009-01-01

409

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

410

Detection of aseismic creep along the San Andreas fault near Parkfield, California with ERS-1 radar interferometry  

Science.gov (United States)

The differential interferometric analysis of ERS data from Parkfield (CA) observations revealed the wide area distribution of creep along the moving fault segment of the San Andreas fault over a 15 month interval. The removal of the interferometric phase related to the surface topography was carried out. The fault was clearly visible in the differential interferogram. The magnitude of the tropospheric water vapor phase distortions is greater than the signal and hinders quantitative analysis beyond order of magnitude calculations.

Werner, Charles L.; Rosen, Paul; Hensley, Scott; Fielding, Eric; Buckley, Sean

1997-01-01

411

Frictional strength heterogeneity and surface heat flow: Implications for the strength of the creeping San Andreas fault  

Science.gov (United States)

Heat flow measurements along much of the San Andreas fault (SAF) constrain the apparent coefficient of friction (??app) of the fault to 0.2 should be detectable even with the sparse existing observations, implying that ??app for the creeping section is as low as the surrounding SAF. Because the creeping section does not slip in large earthquakes, the mechanism controlling its weakness is not related to dynamic processes resulting from high slip rate earthquake ruptures. Copyright 2006 by the American Geophysical Union.

d'Alessio, M. A.; Williams, C.F.; Burgmann, R.

2006-01-01

412

Locating non-volcanic tremor along the San Andreas Fault using a multiple array source imaging technique  

OpenAIRE

Non-volcanic tremor (NVT) has been observed at several subduction zones and at the San Andreas Fault (SAF). Tremor locations are commonly derived by cross-correlating envelope-transformed seismic traces in combination with source-scanning techniques. Recently, they have also been located by using relative relocations with master events, that is low-frequency earthquakes that are part of the tremor; locations are derived by conventional traveltime-based methods. Here we present a method to loc...

Trond Ryberg; Christian Haberland;  fuis, G. S.;  ellsworth, W. L.;  shelly, David R.

2010-01-01

413

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 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

414

Tecnología ósea del alero Las Tumanas (LT1), Valle Fértil, San Juan / Bone technology of Las Tumanas rockshelter (LT1), Valle Fértil, San Juan  

Scientific Electronic Library Online (English)

Full Text Available SciELO Argentina | Language: Spanish Abstract in spanish Presentamos el conjunto de instrumentos óseos del alero Las Tumanas (LT1) -Valle Fértil, San Juan- que representan ocupaciones humanas de comunidades productoras de baja intensidad del Holoceno tardío. Los objetivos principales de esta contribución son determinar las actividades realizadas en el ale [...] ro relacionadas con la construcción, uso y descarte de instrumentos óseos y discutir los alcances interpretativos en una escala macroregional. Determinamos las categorías taxonómicas y anatómicas de los soportes óseos y las relacionamos con la disponibilidad de los recursos faunísticos a partir del conjunto óseo registrado en el alero. También analizamos la distribución espacial de los instrumentos definiendo dos sectores de actividad relacionados con el uso y descarte. Finalmente postulamos una relación entre las características de la tecnología ósea con funciones relacionadas con la manipulación de materias blandas y actividades de punzar y coser. Abstract in english We introduce here the bone assemblage tools from Las Tumanas rockshelter -Valle Fertil, San Juanrepresenting human occupation of low level intensity production communities of late Holocene. The aims of this paper is to determine the rockshelter activities linked with construction, use and discarded [...] of bone tool's and to discuss the interpretive scopes in a macro regional scale. We determine taxonomics and anatomical bone supports and relate them with availability of the faunal resources from the bone assemblage recorded in the site. Also we analyze the spatial distribution of the instruments defining two sectors of activity related to the use and discarded. Finally we postulate a relation between the characteristics of the bone technology with functions related to the manipulation of soft matters and activities to perforate and sewing.

Pablo, Cahiza; Juan Pablo, Aguilar; Jorge, García Llorca.

2012-12-01

415

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

416

Community Heavy Metal Exposure, San Francisco, California  

Science.gov (United States)

Heavy metals are natural elements that generally occur in minute concentrations in the earth's crust. While some of these elements, in small quantities, are vital to life, most are harmful in larger doses. Various industrial and agricultural processes can result in dangerously high concentrations of heavy metals in our environment. Consequently, humans can be exposed to unsafe levels of these elements via the air we breathe, the water and food we consume, and the many products we use. During a two week study we collected numerous samples of sediments, water, food, and household items from around the San Francisco Bay Area that represent industrial, agricultural, and urban/residential settings. We analyzed these samples for Mercury (Hg), Lead (Pb), and Arsenic (As). Our goal was to examine the extent of our exposure to heavy metals in our daily lives. We discovered that many of the common foods and materials in our lives have become contaminated with unhealthy concentrations of these metals. Of our food samples, many exceeded the EPA's Maximum Contaminant Levels (MCL) set for each metal. Meats (fish, chicken, and beef) had higher amounts of each metal than did non-meat items. Heavy metals were also prevalent in varying concentrations in the environment. While many of our samples exceeded the EPA's Sediment Screening Level (SSL) for As, only two other samples surpassed the SSL set for Pb, and zero of our samples exceeded the SSL for Hg. Because of the serious health effects that can result from over-exposure to heavy metals, the information obtained in this study should be used to influence our future dietary and recreational habits.

Chavez, A.; Devine, M.; Ho, T.; Zapata, I.; Bissell, M.; Neiss, J.

2008-12-01

417

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

418

High-resolution SANS experiments by double-crystal technique  

International Nuclear Information System (INIS)

Though small-angle scattering is a method suitable for investigation of microstructure in a wide mesoscopic size range (about 1 nm to 1 ?m), the dynamic Q-range in a single SANS spectrum - defined as the ratio of the maximum value of the scattering vector Q to the Q-resolution of the instrument - is rarely better than about 10. The combination of measurements performed at different Q regions is therefore necessary for better evaluation of SANS experiments, particularly in case of polydisperse systems. Variation of instrument length, slit sizes and neutron wavelength is the usual way how to extend the Q-range accessible at a conventional pinhole SANS instrument. Nevertheless, this possibility is limited on the side of small Q values because of restrictions imposed on the physical length and luminosity of SANS facilities even if they are equipped with an efficient cold neutron source. Alternative techniques for SANS investigation of large objects requiring ultra high resolution were developed, based on the nondispersive arrangement of two perfect crystals. This contribution is focused on the double bent crystal (DBC) diffractometers operating in the intermediate Q-range of 10-4 to 10-2 A-1, which is difficult to access by both the types of instruments mentioned above. (author)

419

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.

420

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

421

Assessment of hydraulic restoration of San Pablo Marsh, California.  

Science.gov (United States)

Inter-tidal marshes are dynamic diverse ecosystems at the transition zone between terrestrial and ocean environments. Geomorphologically, inter-tidal salt marshes are vegetated land-forms at elevations slightly greater than mean tidal levels that have distributed channels formed under ebb (drainage) tidal flows that widen and deepen in the seaward direction. The drainage channels enable tidal flows to circulate sediments and nutrients through the marsh system during normal tidal events, while depositing sediments during storm or seismic events. This dynamic system encourages considerable biodiversity while simultaneously providing water quality enhancement features that service marsh terrestrial life and marine life in the estuary. Reservoir creation limiting sediment transport, anticipated large increases in sea levels as well as agricultural and urban development have resulted in significant loss of inter-tidal marshes and subsequent adverse impacts on waterfowl, infauna and fisheries. The complex and continuously changing marsh channel hydraulics and sedimentary processes have severely constrained quantitative modeling of these marsh systems such that restoration/creation efforts remain something of an empirical