WorldWideScience

Sample records for relation lineaire sans

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

    OpenAIRE

    Ezzat, Marwa

    2011-01-01

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

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

    CERN Document Server

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

    2009-01-01

    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...

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

    Science.gov (United States)

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

    2009-01-01

    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…

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

    Science.gov (United States)

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

    1973-01-01

    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.

  5. 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)

    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

    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.

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

    OpenAIRE

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

    2009-01-01

    This work presents new results of a detailed geological and structural investigation focusing the easternmostUruguayan Mesozoic magmatic occurrences related to the south Atlantic opening. Lithological descriptions,their stratigraphic relationships and complimentary lithochemical characterizations carried out in the SanMiguel region (East Uruguay) are presented. Three volcanic/sub-volcanic units have been recognized. The felsicvolcanic association is composed by rhyolitic - dacitic flows, ...

  7. Road accident-related mortality in the tunja-san gil area, colombia, 2001

    OpenAIRE

    Mayorga Mogollón, Luis Enrique

    2010-01-01

    Objectives: To identify the characteristics of mortality related to motor vehicle accidents in the Tunja-San Gil area (Colombia) in the year 2001. Methods:  A 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 3...

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

    Science.gov (United States)

    Boissonneault, Maxime

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

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

    OpenAIRE

    Faye, I.; Lavallée, I.; Ngom, M.; Seck, D.; Sy, A.

    2010-01-01

    R\\'esum\\'e Apr\\`es un bref aper\\c{c}u permettant de situer notre travail, nous proposons une nouvelle voie pour aborder la programmation lin\\'eaire en proposant un algorithme \\'elabor\\'e \\`a partir d'une id\\'ee simple qui permet d'obtenir une solution aussi approch\\'ee que voulu par translation dichotomique d'un hyperplan de l'espace des solutions. Abstract After a short course in order to situate our work, we propose a new way to study linear programming and we give a proposal of algorithm t...

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

    Directory of Open Access Journals (Sweden)

    Ma. Tania Hernández-Guerrero

    2014-07-01

    Full Text Available The objectives of this research were to reflect on the influence of traditional socio-cultural beliefs about sexuality and reproduction of rural youth in Salinas de Hidalgo, San Luis Potosí, and present the perceptions and practices of gender relations regarding sexuality and reproduction among rural adolescents Salinas de Hidalgo, San Luis Potosí. The theoretical foundation is based on the Gender Perspective and Feminism. Qualitative methodology in-depth interviews and participatory observation. Fieldwork was conducted in Salinas de Hidalgo, San Luis Potosi in 2012 with young population, family, prosecutors and social worker.

  11. Public Perception of Relative Risk: Earthquakes vs. Hurricanes in the San Diego Region

    Science.gov (United States)

    Means, J. D.

    2014-12-01

    Public perception of risk is key in pre-disaster preparation. Despite admonitions from emergency planners, people often fail to take reasonable precautions. But if emergency planners also fail to realize the possibility of a particular disaster scenario, there is very little chance that the public will plan for it. In Southern California there is a well-known risk associated with earthquakes, and it would be difficult to find anyone that didn't understand that the region was subject to risk from earthquakes. On the other hand, few, if any people consider the risk associated with tropical storms or hurricanes. This is reasonable considering people have always been told that the west coast of the United States is immune from hurricanes due to the cold water associated with the California Current, and the hazard of earthquakes is fairly obvious to anyone that has lived the for a while. Such an attitude is probably justifiable for most of Southern California, but it's unclear whether this is true for the San Diego region: destructive earthquakes are historically rare, and there is good evidence that the region was affected by a Category 1 hurricane in 1858. Indeed, during the last 70 years, more people have died from tropical cyclones in Calfornia's southernmost counties (San Diego and Imperial) than have died from earthquakes. In this paper we compare the relative risks from these two different types of disasters for the San Diego region, and attempt to answer why one type of hazard is emphasized in public planning and the other is neglected.

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

    Directory of Open Access Journals (Sweden)

    Conti Bruno

    2009-07-01

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

  13. 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 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.

  14. 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

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

    Science.gov (United States)

    Skagen, Kiki, Ed.

    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;…

  16. On the stability of non-linear systems; Sur la stabilite des systemes non-lineaires

    Energy Technology Data Exchange (ETDEWEB)

    Guelman, M. [Commissariat a l' Energie Atomique, 91 - Saclay (France). Centre d' Etudes Nucleaires, services scientifiques

    1968-09-01

    A study is made of the absolute stability of nonlinear systems, using Liapounov's second method and taking into account the results obtained from V.M. Popov's work. The results already established are first presented, in particular concerning the frequency domain criterions for absolute stability of automatic control systems containing one single non linearity. The results have been extended to show the existence of a limiting parabola. New use is then made of the methods studied for deriving absolute stability criterions for a system containing a different type of non linearity. Finally, the results obtained are considered from the point of view of Aizerman's conjecture. (author) [French] Dans ce travail, on etudie la stabilite absolue des systemes non lineaires utilisant la deuxieme methode de Liapounov en tenant compte des resultats acquis a partir des travaux de V.M. Popov. On fait d'abord un expose des resultats deja etablis, en particulier en ce qui concerne les criteres frequentiels de stabilite absolue pour le cas d'un systeme de commande automatique comportant une seule non linearite. On a prolonge ces resultats jusqu'a l'etablissement de l'existence d'une parabole limite. On fait ensuite une nouvelle utilisation des methodes etudiees, etablissant des criteres de stabilite absolue pour un systeme comportant un type different de non linearite. On etudie enfin les resultats obtenus, dans l'optique de la conjecture de Aizerman. (auteur)

  17. Anomalous Diffuse CO2 Emission Changes at San Vicente Volcano Related to Earthquakes in El Salvador, Central America

    Science.gov (United States)

    Salazar, J.; Hernandez, P.; Perez, N.; Barahona, F.; Olmos, R.; Cartagena, R.; Soriano, T.; Notsu, K.; Lopez, D.

    2001-12-01

    San Vicente or Chichontepeque (2,180 m a.s.l.) is a composite andesitic volcano located 50 Km east of San Salvador. Its paired edifice rises from the so-called Central Graben, an extensional structure parallel to the Pacific coast, and has been inactive for the last 3000 yrs. Fumaroles (98.2C ) and hot spring waters are present along radial faults at two localities on the northern slope of the volcano (Aguas Agrias and El Infiernillo). CO2 is the most abundant component in the dry gas (>90%) and its mean isotopic composition (? 13C(CO2)=-2.11 and 3He/4He of 6.9 Ra) suggests a magmatic origin for the CO2. These manifestations are supposed to be linked to a 1,200 m depth 250C reservoir with a CO2 partial pressure of 14 bar extended beneath the volcano (Aiuppa et al., 1997). In February 13, 2001, a 6.6 magnitude earthquake with epicenter about 20 Km W of San Vicente damaged and destroyed many towns and villages in the north area of the volcano causing some deceases. In addition, two seismic swarms were recorded beneath the northeastern flank of the volcano in April and May 2001. Searching for any link between the actual seismic activity and changes in the diffuse CO2 degassing at San Vicente, an NDIR instrument for continuos monitoring of the diffuse CO2 degassing was set up at Aguas Agrias in March 2001. Soil CO2 efflux and several meteorological and soil physical variables were measured in an hourly basis. Very significative pre-seismic and post-seismic relationships have been found in the observed diffuse CO2 efflux temporal variations related to the May 2001 seismic swarms. A sustained 50% increase on the average diffuse CO2 efflux was observed 8 days before the May 8, 5.1 magnitude earthquake. This pre-seismic behaviour may be considered a precursor of the May 2001 seismic swarm at San Vicente volcano. However, about a three-fold increase in the diffuse CO2 efflux was also observed after the intense seismicity recorded on May 8-9. These preliminary results suggest that changes in the fluid pore-pressure within faults/fractures associated to the volcanic roots may be triggering, enhancing and responding (aperture and closure of fractures) to the local seismicity in the area of San Vicente volcano.

  18. Conception de lois de pilotage robustes et sequencement de gains par l'approche de systemes lineaires a parametres variants

    Science.gov (United States)

    Hentabli, Kamel

    Cette recherche s'inscrit dans le cadre du projet de recherche Active Control Technology entre l'Ecole de Technologie Superieure et le constructeur Bombardier Aeronautique . Le but est de concevoir des strategies de commandes multivariables et robustes pour des modeles dynamiques d'avions. Ces strategies de commandes devraient assurer a l'avion une haute performance et satisfaire des qualites de vol desirees en l'occurrence, une bonne manoeuvrabilite, de bonnes marges de stabilite et un amortissement des mouvements phugoides et rapides de l'avion. Dans un premier temps, nous nous sommes principalement interesses aux methodes de synthese LTI et plus exactement a l'approche Hinfinity et la mu-synthese. Par la suite, nous avons accorde un interet particulier aux techniques de commande LPV. Pour mener a bien ce travail, nous avons envisage une approche frequentielle, typiquement Hinfinity. Cette approche est particulierement interessante, dans la mesure ou le modele de synthese est construit directement a partir des differentes specifications du cahier des charges. En effet, ces specifications sont traduites sous forme de gabarits frequentiels, correspondant a des ponderations en entree et en sortie que l'on retrouve dans la synthese Hinfinity classique. Par ailleurs, nous avons utilise une representation de type lineaire fractionnelle (LFT), jugee mieux adaptee pour la prise en compte des differents types d'incertitudes, qui peuvent intervenir sur le systeme. De plus, cette representation s'avere tres appropriee pour l'analyse de la robustesse via les outils de la mu-analyse. D'autre part, afin d'optimiser le compromis entre les specifications de robustesse et de performance, nous avons opte pour une structure de commande a 2 degres de liberte avec modele de reference. Enfin, ces techniques sont illustrees sur des applications realistes, demontrant ainsi la pertinence et l'applicabilite de chacune d'elle. Mots cles. Commande de vol, qualites de vol et manoeuvrabilite, commande robuste, approche Hinfinity , mu-synthese, systemes lineaires a parametres variants, sequencement de gains, transformation lineaire fractionnelle, inegalite matricielle lineaire.

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

    OpenAIRE

    Silvia Ventura Luna

    2010-01-01

    Este artículo ofrece un recuento de los continuos efectos de la migración sobre el gobierno municipal y la organización de una comunidad mixteca: San Miguel Cuevas, Oaxaca, México. Legalmente constituida como un autogobierno municipal indígena, en décadas recientes, Cuevas ha sido reconstituida como una comunidad transnacional, cuyos ciudadanos radican principalmente en ella y en Fresno, California. La creciente circularidad y permanente migración de Cuevas a Estados Unidos desde finales de l...

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

    International Nuclear Information System (INIS)

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

  1. Confinement of a non cylindrical z discharge by a cusp geometry; Confinement d'une decharge lineaire non-cylindrique par une geometrie magnetique cuspidee

    Energy Technology Data Exchange (ETDEWEB)

    Watteau, J.H. [Commissariat a l' Energie Atomique, Limeil-Brevannes (France). Centre d' Etudes

    1968-03-01

    The plasma of a non-cylindrical z discharge is accumulated in the centre of a cusp geometry and then captured and confined by the rising cusp magnetic field. The cusp geometry is produced by two identical coaxial coils the currents of which are equal but in opposite directions. Stability and confinement properties of this zero minimum B geometry are recalled; in particular it is shown (the coils cross section being supposed punctual) that the magnetic well depth of the configuration without plasma is maximum for an optimum coils distance. Two modes of confinement are observed experimentally : - a collisional mode for which the plasma confinement is limited to 10 {mu}sec (temperature 5 eV, density 7 x 10{sup 16} cm{sup -3}) as a result of the gradual interpenetration of the plasma and of the magnetic field. - a collisionless mode (temperature 40 eV) where the radial leak thickness is of the order of the ion cyclotron radius. Plasma accumulation occurs even without confinement and is due to the non-cylindrical shape of the discharge chamber. The two-dimensional snow-plough model gives good account of the discharge dynamics. A comparison is made with plasma focus experiments: in particular experimental conditions (deuterium, pressure 1 torr,energy 3 kJ, current 100 kA) a 10{sup 7} neutron yield is detected which appears to be connected with the unstable behavior of the discharge. (authors) [French] Le plasma d'une decharge lineaire non-cylindrique s'accumule au centre d'une geometrie magnetique cuspidee ou il est capture et confine par l'induction croissante de la geometrie. On rappelle les proprietes de stabilite et de confinement de la geometrie cuspidee, geometrie a champ minimum nul produite par deux spires identiques, coaxiales et parcourues par des courants egaux et opposes; on montre en particulier que pour des spires de section ponctuelle la profondeur du puits magnetique de la geometrie sans plasma est maximum pour une distance optimum des spires. Deux regimes de confinement sont observes experimentalement: - un regime collisionnel pour lequel le confinement du plasma (temperature 5 eV, densite 7.10{sup 16} cm{sup -3}) est limite a lO{mu}s par suite de l'interpenetration progressive du plasma et de l'induction. - un regime sans collision (temperature 40 eV) ou l'epaisseur de la fuite radiale est comparable au rayon cyclotronique ionique. L'accumulation du plasma a lieu meme sans induction de confinement et resulte de la forme non-cylindrique de la chambre a decharge. Le modele du chasse-neige bidimensionnel interprete correctement la dynamique de la decharge. On etablit un rapprochement avec les experiences de focalisation de plasma: pour des conditions experimentales particulieres (deuterium, pression 1 torr, energie 3 kJ, courant 100 kA) on detecte une emission neutronique de neutrons qui semble liee a la nature instable de la decharge. (auteurs)

  2. Study of the dispersion phenomena connected with the absorption by recoilless nuclear resonance fluorescence; Etude des phenomenes de dispersion lies a l'absorption resonnante sans recul des noyaux atomiques

    Energy Technology Data Exchange (ETDEWEB)

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

    1965-12-01

    In nuclear resonance fluorescence as in the optical field abnormal dispersion curves are related to the absorption lines. It is possible, by using quadrupolar or magnetic splitting of the line in the case of recoilless resonance fluorescence (Moessbauer effect) to obtain differential dispersion effects between the two orthogonal linear or the two inverse circular components of the incident gamma radiation. These effects induce bi-refraction phenomena or Faraday rotation on the gamma beam, which have been studied on Fe-57 enriched absorbers. (author) [French] Comme dans le domaine optique, aux raies d'absorption de fluorescence resonnante des noyaux atomiques sont associees des courbes de dispersion anormale. Les decompositions des raies d'absorption de fluorescence resonnante sans recul (raies Moessbauer) par couplage quadrupolaire ou effet Zeeman permettent d'obtenir des effets dispersifs differentiels entre composantes lineaires orthogonales ou circulaires inverses du rayonnement gamma incident. Ces effets se traduisent par des phenomenes de birefringence ou de rotation Faraday, qui ont pu etre etudies sur des milieux enrichis en fer-57. (auteur)

  3. Problems related to water quality and algal control in Lopez Reservoir, San Luis Obispo County, California

    Science.gov (United States)

    Fuller, Richard H.; Averett, Robert C.; Hines, Walter G.

    1975-01-01

    A study to determine the present enrichment status of Liopez Reservoir in San Luis Obispo county, California, and to evaluate copper sulfate algal treatment found that stratification in the reservoir regulates nutrient release and that algal control has been ineffective. Nuisance algal blooms, particularly from March to June, have been a problem in the warm multipurpose reservoir since it was initially filled following intense storms in 1968-69. The cyanophyte Anabaena unispora has been dominant; cospecies are the diatoms Stephanodiscus astraea and Cyclotella operculata, and the chlorophytes Pediastrum deplex and Sphaerocystis schroeteri. During an A. unispora bloom in May 1972 the total lake surface cell count was nearly 100,000 cells/ml. Thermal stratification from late spring through autumn results in oxygen deficiency in the hypolimnion and metalimnion caused by bacterial oxidation of organic detritus. The anaerobic conditions favor chemical reduction of organic matter, which constitute 10-14% of the sediment. As algae die, sink to the bottom, and decompose, nutrients are released to the hypolimnion , and with the autumn overturn are spread to the epilimnion. Algal blooms not only hamper recreation, but through depletion of dissolved oxygen in the epilimnion may have caused periodic fishkills. Copper sulfate mixed with sodium citrate and applied at 1.10-1.73 lbs/acre has not significantly reduced algal growth; a method for determining correct dosage is presented. (Lynch-Wisconsin)

  4. 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

  5. San Francisco District Laboratory (SAN)

    Data.gov (United States)

    Federal Laboratory Consortium — Program Capabilities Food Analysis SAN-DO Laboratory has an expert in elemental analysis who frequently performs field inspections of materials. A recently acquired...

  6. 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)

  7. Estimating alcohol-related premature mortality in san francisco: use of population-attributable fractions from the global burden of disease study

    Directory of Open Access Journals (Sweden)

    Reiter Randy B

    2010-11-01

    Full Text Available Abstract Background In recent years, national and global mortality data have been characterized in terms of well-established risk factors. In this regard, alcohol consumption has been called the third leading "actual cause of death" (modifiable behavioral risk factor in the United States, after tobacco use and the combination of poor diet and physical inactivity. Globally and in various regions of the world, alcohol use has been established as a leading contributor to the overall burden of disease and as a major determinant of health disparities, but, to our knowledge, no one has characterized alcohol-related harm in such broad terms at the local level. We asked how alcohol-related premature mortality in San Francisco, measured in years of life lost (YLLs, compares with other well-known causes of premature mortality, such as ischemic heart disease or HIV/AIDS. Methods We applied sex- and cause-specific population-attributable fractions (PAFs of years of life lost (YLLs from the Global Burden of Disease Study to 17 comparable outcomes among San Francisco males and females during 2004-2007. We did this in three ways: Method 1 assumed that all San Franciscans drink like populations in developed economies. These estimates were limited to alcohol-related harm. Method 2 modified these estimates by including several beneficial effects. Method 3 assumed that Latino and Asian San Franciscans drink alcohol like populations in the global regions related to their ethnicity. Results By any of these three methods, alcohol-related premature mortality accounts for roughly a tenth of all YLLs among males. Alcohol-related YLLs among males are comparable to YLLs for leading causes such as ischemic heart disease and HIV/AIDS, in some instances exceeding them. Latino and black males bear a disproportionate burden of harm. Among females, for whom estimates differed more by method and were smaller than those for males, alcohol-related YLLs are comparable to leading causes which rank somewhere between fifth and fourteenth. Conclusions Alcohol consumption is a major contributor to premature mortality in San Francisco, especially among males. Interventions to avert alcohol-related harm in San Francisco should be taken at the population level and deserve the same attention that is given to other major risk factors, such as smoking or obesity.

  8. 77 FR 36041 - San Antonio Central Railroad, L.L.C.-Lease Exemption-Port Authority of San Antonio

    Science.gov (United States)

    2012-06-15

    ... Surface Transportation Board San Antonio Central Railroad, L.L.C.--Lease Exemption--Port Authority of San Antonio San Antonio Central Railroad, L.L.C. (SAC), a noncarrier, has filed a verified notice of exemption... Authority of San Antonio (the Port), in San Antonio, Tex. This transaction is related to a...

  9. Racial discrimination and alcohol-related behavior in urban transit operators: findings from the San Francisco Muni Health and Safety Study.

    OpenAIRE

    Yen, I H; Ragland, D. R.; Greiner, B.A.; Fisher, J M

    1999-01-01

    OBJECTIVE: A growing body of literature is documenting the health effects of racial discrimination. The authors investigated the association between racial discrimination and alcohol-related behavior in a sample of urban transit operators. METHODS: Using data from a 1993-1995 cross-sectional study of transit operators in San Francisco, California, the authors analyzed responses to two sets of questions about racial discrimination; the first set focused on reaction to unfair treatment and the ...

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

    Science.gov (United States)

    Langlois, Sebastien

    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

  11. San Marino.

    Science.gov (United States)

    1985-02-01

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

  12. 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)

    Luis Enrique Mayorga Mogollón

    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 %.

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

    International Nuclear Information System (INIS)

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

  14. San Francisco Flood Health Vulnerability

    Data.gov (United States)

    U.S. Department of Health & Human Services — The San Francisco Department of Public Health Flood Health Vulnerability Index is a composite index that measures the spatial distribution and relative...

  15. Stormwater-related transport of the insecticides bifenthrin, fipronil, imidacloprid, and chlorpyrifos into a tidal wetland, San Francisco Bay, California.

    Science.gov (United States)

    Weston, Donald P; Chen, Da; Lydy, Michael J

    2015-09-15

    Suisun Marsh, in northern San Francisco Bay, is the largest brackish marsh in California, and provides critical habitat for many fish species. Storm runoff enters the marsh through many creeks that drain agricultural uplands and the urban areas of Fairfield and Suisun City. Five creeks were sampled throughout a major storm event in February 2014, and analyzed for representatives of several major insecticide classes. Concentrations were greatest in creeks with urban influence, though sampling was done outside of the primary season for agricultural pesticide use. Urban creek waters reached maximum concentrations of 9.9 ng/l bifenthrin, 27.4 ng/l fipronil, 11.9 ng/l fipronil sulfone, 1462 ng/l imidacloprid, and 4.0 ng/l chlorpyrifos. Water samples were tested for toxicity to Hyalella azteca and Chironomus dilutus, and while few samples caused mortality, 70% of the urban creek samples caused paralysis of either or both species. Toxic unit analysis indicated that bifenthrin was likely responsible for effects to H. azteca, and fipronil and its sulfone degradate were responsible for effects to C. dilutus. These results demonstrate the potential for co-occurrence of multiple insecticides in urban runoff, each with the potential for toxicity to particular species, and the value of toxicity monitoring using multiple species. In the channels of Suisun Marsh farther downstream, insecticide concentrations and toxicity diminished as creek waters mixed with brackish waters entering from San Francisco Bay. Only fipronil and its degradates remained measurable at 1-10 ng/l. These concentrations are not known to present a risk based on existing data, but toxicity data for estuarine and marine invertebrates, particularly for fipronil's degradates, are extremely limited. PMID:25956145

  16. Social factors related to risk for violence and sexually transmitted infections/HIV among Asian massage parlor workers in San Francisco.

    Science.gov (United States)

    Nemoto, Tooru; Iwamoto, Mariko; Wong, Serena; Le, Mai Nhung; Operario, Don

    2004-12-01

    Asian women who work at massage parlors in San Francisco have high levels of risk for sexually transmitted infections (STIs), including HIV, and being victims of violence, which jeopardizes their health and wellbeing. On the basis of mapping, the targeted districts in San Francisco where massage parlors were located, 23 massage parlors were identified where commercial sex activity took place. Using snowball-sampling methods, 43 Asian female massage parlor workers were recruited for focus groups; 21 participants were Vietnamese and 22 were Thai. Qualitative analyses revealed frequent exposure to violence including verbal or physical abuse from customers and gang members, as well as persistent HIV risk behaviors associated with multiple daily sex partners, inconsistent condom use with customers, and forced sex. Social factors related to gender, immigration status, and socioeconomic status appeared to be closely tied to the health and wellbeing of Asian masseuses. Study findings suggest that individualized as well as community-level interventions are necessary to improve these women's health and decrease their prolonged exposure to risks for STIs and violence. PMID:15690120

  17. Study and realization of an electron linear accelerator. Dynamics of accelerated electrons; Etude et realisation d'un accelerateur lineaire d'electrons. Dynamique des electrons acceleres

    Energy Technology Data Exchange (ETDEWEB)

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

    1967-04-01

    The theoretical characteristics of the electron linear accelerator are: 30 MeV for the energy W{sub S} and 250 mA for the peak current I{sub c}. The main utilization is the intense production of fast neutrons by the reactions ({gamma},n) and ({gamma},f) induced in a target of natural uranium by the accelerated electrons. In the first part of the thesis, relative to the study and the realization of the accelerator, a new equation of dispersion is established analytically when the guide is loaded with round-edged irises. The relation is compared with the equation established by CHU and Hansen, WALKINSHAW, KVASIL in the case of a guide loaded with flat-edged irises. The experimental and theoretical curves of dispersion are compared. The accuracy of every relation of dispersion is estimated. The second part of the thesis is relative to the theoretical study of the electrons dynamics in the guide; it allows the derivation of the parameters of the beam: dispersion of phase, energy, dispersion of energy and the relation W{sub S} = f (I{sub c}). The results relative to the first experiments are given and compared with the theoretical expectations. (author) [French] Les caracteristiques nominales theoriques de l'accelerateur lineaire d'electrons sont: 30 MeV pour l'energie W{sub S} et 250 mA pour le courant de crete I{sub c}. L'utilisation principale envisagee est la production de neutrons rapides par les reactions ({gamma},n) et ({gamma},f) induites dans une cible d'uranium naturel par les electrons acceleres. Dans la premiere partie de la these relative a l'elude et a la realisation de l'accelerateur, une nouvelle equation de dispersion (ou equation aux frequences) est etablie analytiquement pour un guide charge par des iris a bord rond. Cette relation est comparee a celles etablies par CHU et HANSEN, WALKINSHAW, KVASIL dans le cas du guide charge par des iris a bord plat. On compare les courbes de dispersion theoriques et experimentales et on evalue la precision de chacune de ces relations de dispersion. La deuxieme partie de la these relative a l'etude theorique de la dynamique des electrons dans le guide permet de deduire les parametres du faisceau: etalement en phase, energie, etalement en energie des electrons et caracteristiques en charge theoriques W{sub S} = f (I{sub c}). Les resultats experimentaux relatifs aux premiers essais de l'accelerateur sont donnes et compares aux previsions theoriques. (auteur)

  18. 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)

    María Silvia Japas

    2010-12-01

    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.

  19. Mercury in the mix: An in situ mesocosm approach to assess relative contributions of mercury sources to methylmercury production and bioaccumulation in the Sacramento-San Joaquin Delta

    Science.gov (United States)

    Fleck, J.; Krabbenhoft, D. P.; Kraus, T. E. C.; Ackerman, J.; Stumpner, E. B.; DeWild, J.; Marvin-DiPasquale, M. C.; Tate, M.; Ogorek, J.

    2014-12-01

    Mercury (Hg) contamination is considered one of the greatest threats to the Sacramento-San Joaquin Delta and the San Francisco Estuary ecosystems. This threat is driven by the transformation of Hg, deposited in the Delta from erosion of upstream historic mining debris and atmospheric deposition, by native bacteria into the more toxic and biologically available form, methylmercury (MeHg), in the wetlands and sediment of the Delta. To effectively manage this threat, a quantitative understanding of the relative contribution of the different Hg sources to MeHg formation is needed. Mass balance estimates indicate as much as 99% of the Hg entering the Delta arrives via tributary inputs. Of the tributary Hg load, approximately 90% is adsorbed to suspended particles from tributary discharge and 10% is in the dissolved fraction, potentially of atmospheric origin. In comparison, the remaining 1-2% of the Hg entering the Delta arrives through direct atmospheric deposition (wet and dry). The relative importance of these sources to MeHg production within the Delta is not linearly related to the mass inputs because atmospherically-derived Hg is believed to be more reactive than sediment-bound Hg with respect to MeHg formation. We conducted an in situ mesocosm dosing experiment where different Hg sources to the Delta (direct atmospheric, dissolved riverine and suspended sediment) were "labeled" with different stable Hg isotopes and added to mesocosms within four different wetlands. Mercury isotopes added with the streambed sediments were equilibrated in sealed containers for six months; while the Hg isotopes associated with the precipitation and river water were equilibrated for 24 hours prior to use. After adding the isotopes, we sampled the water column, overlying air, bottom sediments and fish (Gambusia) at time intervals up to 30 days. Preliminary results from this experiment suggest that aqueous Hg sources (Hg introduced with precipitation and filtered river water) are 10-1,000x more available to methylating microbes and fish uptake than particle bound Hg. Consequently, although atmospheric Hg deposition may contribute a relatively small portion of the total Hg loading to the Delta, it may contribute to a substantial portion of the MeHg produced within the Delta.

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

    Energy Technology Data Exchange (ETDEWEB)

    Michot, J.

    2010-12-09

    The works presented in this manuscript are in the field of computer vision, and tackle the problem of real-time vision based localization and 3D reconstruction. In this context, the trajectory of a camera and the 3D structure of the filmed scene are initially estimated by linear algorithms and then optimized by a nonlinear algorithm, bundle adjustment. The thesis first presents a new technique of line search, dedicated to the nonlinear minimization algorithms used in Structure-from-Motion. The proposed technique is not iterative and can be quickly installed in traditional bundle adjustment frameworks. This technique, called Global Algebraic Line Search (G-ALS), and its two-dimensional variant (Two way-ALS), accelerate the convergence of the bundle adjustment algorithm. The approximation of the re-projection error by an algebraic distance enables the analytical calculation of an effective displacement amplitude (or two amplitudes for the Two way-ALS variant) by solving a degree 3 (G-ALS) or 5 (Two way-ALS) polynomial. Our experiments, conducted on simulated and real data, show that this amplitude, which is optimal for the algebraic distance, is also efficient for the Euclidean distance and reduces the convergence time of minimizations. One difficulty of real-time tracking algorithms (monocular SLAM) is that the estimated trajectory is often affected by drifts: on the absolute orientation, position and scale. Since these algorithms are incremental, errors and approximations are accumulated throughout the trajectory and cause global drifts. In addition, a tracking vision system can always be dazzled or used under conditions which prevented temporarily to calculate the location of the system. To solve these problems, we propose to use an additional sensor measuring the displacement of the camera. The type of sensor used will vary depending on the targeted application (an odometer for a vehicle, a lightweight inertial navigation system for a person). We propose to integrate this additional information directly into an extended bundle adjustment, by adding a constraint term in the weighted cost function. We evaluate three methods (based on machine learning or regularization) that dynamically select the weight associated to the constraint and show that these methods can be used in a real time multi-sensor SLAM, and validate them with different types of constraint on the orientation or on the scale. Experiments conducted on real video sequences show that this technique of constrained bundle adjustment reduces the drifts observed with the classical vision algorithms and improves the global accuracy of the positioning system. (author) [French] Les travaux presentes dans ce manuscrit concernent le domaine de la localisation et la reconstruction 3D par vision artificielle. Dans ce contexte, la trajectoire d'une camera et la structure 3D de la scene filmee sont initialement estimees par des algorithmes lineaires puis optimisees par un algorithme non-lineaire, l'ajustement de faisceaux. Cette these presente tout d'abord une technique de recherche de l'amplitude de deplacement (recherche lineaire), ou line search pour les algorithmes de minimisation iterative. La technique proposee est non iterative et peut etre rapidement implantee dans un ajustement de faisceaux traditionnel. Cette technique appelee recherche lineaire algebrique globale (G-ALS), ainsi que sa variante a deux dimensions (Two way-ALS), accelerent la convergence de l'algorithme d'ajustement de faisceaux. L'approximation de l'erreur de reprojection par une distance algebrique rend possible le calcul analytique d'une amplitude de deplacement efficace (ou de deux pour la variante Two way-ALS), par la resolution d'un polynome de degre 3 (G-ALS) ou 5 (Two way-ALS). Nos experimentations sur des donnees simulees et reelles montrent que cette amplitude, optimale en distance algebrique, est performante en distance euclidienne, et permet de reduire le temps de convergence des minimisations. Une difficulte des algorithmes de localisation en temps reel par la vision (SLAM monoculaire) est que la trajectoire estimee est souvent affectee par des derives: derives d'orientation, de position et d'echelle. Puisque ces algorithmes sont incrementaux, les erreurs et approximations sont cumulees tout au long de la trajectoire, et une derive se forme sur la localisation globale. De plus, un systeme de localisation par vision peut toujours etre ebloui ou utilise dans des conditions qui ne permettent plus temporairement de calculer la localisation du systeme. Pour resoudre ces problemes, nous proposons d'utiliser un capteur supplementaire mesurant les deplacements de la camera. Le type de capteur utilise varie suivant l'application ciblee (un odometre pour la localisation d'un vehicule, une centrale inertielle legere ou un systeme de navigation a guidage inertiel pour localiser une personne). Notre approche consiste a integrer ces informations complementaires directement dans l'ajustement de faisceaux, en ajoutant un terme de contrainte pondere dans la fonction de cout. Nous evaluons trois methodes permettant de selectionner dynamiquement le coefficient de ponderation et montrons que ces methodes peuvent etre employees dans un SLAM multi-capteur temps reel, avec differents types de contrainte, sur l'orientation ou sur la norme du deplacement de la camera. La methode est applicable pour tout autre terme de moindres carres. Les experimentations menees sur des sequences video reelles montrent que cette technique d'ajustement de faisceaux contraint reduit les derives observees avec les algorithmes de vision classiques. Ils ameliorent ainsi la precision de la localisation globale du systeme

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

    Directory of Open Access Journals (Sweden)

    Lucila P. Acosta R

    2012-02-01

    Full Text Available 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 NOM 007 norm and its correlation with maternal morbidity in a health center located in San Luis Potosí, Mexico. Methodology: 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 < 0.000.

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

    Scientific Electronic Library Online (English)

    Briseida, Lpez-lvarez; Jos Alfredo, Ramos-Leal; Janete, Moran-Ramrez; Antonio, Cardona Benavides; Guillermo, Hernndez Garcia.

    2013-04-01

    Full Text Available La historia de la ciudad San Luis Potos 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 Potos, dando lugar a los dos primeros usos de suelo, urbano y minero. A partir del siglo XVII [...] , el uso de suelo agrcola se desarroll en huertos y fue relegado a la periferia de la zona urbana en el transcurso del tiempo. Finalmente el uso de suelo industrial surgi 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 Potos son el urbano, agrcola e industrial. A travs de una campaa de muestreo hidrogeoqumico en octubre de 2008, con 44 muestras de norias y 3 de manantiales dentro del valle, se evaluaron parmetros fsico-qumicos, 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 elctrica, coliformes totales y fecales; sin embargo, en la zona urbana existen anomalas puntuales de metales pesados principalmente de mercurio, bario, estroncio, cadmio, plomo, fsforo y plata, relacionadas a las antiguas actividades mineras y a la industria activa en la zona. Mientras que en la zona agrcola, la presencia de metales est asociada a los canales a cielo abierto que tambin reciben agua del Tanque Tenorio y ste a su vez de la zona industrial. En la zona industrial se detectaron grandes anomalas de tipo puntual en casi todos los metales pesados analizados; la principal fuente de estos contaminantes corresponden a un terreno industrial activo. Este trabajo est enfocado a evaluar el impacto que ha generado la actividad antropognica sobre el acufero colgado del Valle de San Luis Potos desde inicios de la fundacin de la ciudad hasta la actualidad, utilizando la calidad del agua como herramienta de anlisis. 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 Potos 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 Potos since the city's foundation to the present, using water quality as an analytical tool.

  3. 77 FR 54811 - Safety Zone; TriRock San Diego, San Diego Bay, San Diego, CA

    Science.gov (United States)

    2012-09-06

    .... SUPPLEMENTARY INFORMATION: Table of Acronyms DHS Department of Homeland Security FR Federal Register NPRM Notice... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; TriRock San Diego, San Diego Bay, San Diego... safety zone upon the navigable waters of the San Diego Bay, San Diego, CA, in support of a bay swim...

  4. 78 FR 53243 - Safety Zone; TriRock San Diego, San Diego Bay, San Diego, CA

    Science.gov (United States)

    2013-08-29

    ... Acronyms DHS Department of Homeland Security FR Federal Register NPRM Notice of Proposed Rulemaking A... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; TriRock San Diego, San Diego Bay, San Diego... temporary safety zone upon the navigable waters of the San Diego Bay, San Diego, CA, in support of...

  5. Emergency conflict-related psychosocial interventions in Sierra Leone and Uganda: lessons from Médecins Sans Frontières

    OpenAIRE

    de Jong, Kaz; Kleber, Rolf J.

    2007-01-01

    Médecins Sans Frontières has been involved in emergency mental health or psychosocial programmes since 1990. In this article the intervention model developed for emergency settings is shared. Psychosocial programmes distinguish two elements. The 'psycho'-component facilitates the reconnection of the affected individual to his environment. The 'socio'-element aims to create an environment that facilitates the individual to re-integrate. The nature of mental health and psychosocial programmes r...

  6. O pblico e o privado na primeira LDB: a relao entre San Tiago Dantas e Ansio Teixeira / Public et priv dans la premire LDB: la relation entre San Tiago Dantas et Ansio Teixeira / Public and private in the first LDB: the relationship between San Tiago Dantas and Ansio Teixeira / Pblico y privado en la primera LDB: la relacin entre San Tiago Dantas y Ansio Teixeira

    Scientific Electronic Library Online (English)

    Jos Antonio Miranda, Sepulveda.

    2013-12-01

    Full Text Available Este trabalho teve por objetivo analisar uma carta do educador Ansio Teixeira para o deputado San Tiago Dantas datada de julho de 1959, durante o perodo em que tramitava o projeto de Lei de Diretrizes e Bases da Educao Nacional. Trata-se de um material cujo contedo esclarece a discusso entre o [...] s dois interlocutores sobre os substitutivos de lei propostos pelo deputado Carlos Lacerda, poca da tramitao do citado projeto. Este trabalho concluiu que a relao entre San Tiago Dantas e Ansio Teixeira, em oposio ao que estava sendo proposto pelos referidos substitutivos, convergia na defesa da escola pblica questionando a transferncia de recursos pblicos 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 perodo de la hora de proceder a travs del proyecto de Ley de Directrices y Bases de la Educacin 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 realizacin de dicho proyecto. Este estudio lleg a la conclusin de que la relacin entre San Tiago Dantas y Teixeira, a diferencia de lo que se propona por los sustitutos, se reunieron en la defensa de la escuela pblica en duda la transferencia de recursos pblicos a la empresa privada. Abstract in english This study aimed to analyze a letter from Mr. Ansio 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.

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

    OpenAIRE

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

    2012-01-01

    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...

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

    Science.gov (United States)

    Faribault, Alexandre

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

  9. San Francisco Accelerator Conference

    International Nuclear Information System (INIS)

    'Where are today's challenges in accelerator physics?' was the theme of the open session at the San Francisco meeting, the largest ever gathering of accelerator physicists and engineers

  10. 76 FR 4371 - Notice of Intent to Prepare an Environmental Impact Statement for the Proposed San Juan Basin...

    Science.gov (United States)

    2011-01-25

    ... San Juan Basin Energy Connect Project, San Juan County, New Mexico, and La Plata County, Colorado... of the Draft EIS. ADDRESSES: You may submit comments related to the San Juan Basin Energy Connect...@sjbenergyconnect.com ; or Mail: Bureau of Land Management, Farmington Field Office, Attention: San Juan...

  11. SANS studies of polymers

    International Nuclear Information System (INIS)

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

  12. The San Andreas Fault 'Supersite' (Invited)

    Science.gov (United States)

    Hudnut, K. W.

    2013-12-01

    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.

  13. Development and Optimization of High-Resolution Neutron Scattering Instruments Dedicated to Characterization and Testing of Materials of Relevance to Nuclear Energy Sector and Related Experiments in SANS, Residual Strain/Stress and Texture Studies

    International Nuclear Information System (INIS)

    In this report we present the results we have received in the frame of participation in the CRP project. According to the plan of the project several experiments related namely to characterisation and testing of materials of relevance to nuclear sector were carried out. In this way two experimental methods were used: residual strain/stress measurements by neutron diffraction and small angle neutron scattering (SANS). A special attention has been paid to the following samples: Austenitic stainless steel plates with a longitudinal weld joint, Charpy-V notched specimen of low-alloy ferritic steel, 50 mm thick welds in feritic steel, austenitic single pass fillet steel welds, Ni-based CMSX4 superalloy. (author)

  14. Innovation in san francisco.

    Science.gov (United States)

    Travis, J

    1992-08-01

    In San Francisco 2 weeks ago, AAAS and Science sponsored a new meeting, Science Innovation '92. The unusual gathering focused not on research results but on new techniques and instruments, particularly for biomedical science. As seen in the stories below, some of the most eye-catching innovations emerged at the intersection of physics and biology. PMID:17736460

  15. 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

  16. Dynamics of nutrient cycling and related benthic nutrient and oxygen fluxes during a spring phytoplankton bloom in South San Francisco Bay (USA)

    Science.gov (United States)

    Grenz, C.; Cloern, J.E.; Hager, S.W.; Cole, B.E.

    2000-01-01

    Benthic oxygen uptake and nutrient releases of N, P and Si were measured weekly at 2 sites in South San Francisco Bay around the 1996 spring bloom. Exchanges across the sediment-water interface were estimated from whole core incubations performed in the laboratory at in situ temperature and in dark. Fluxes changed significantly on a weekly time scale. Over a period of 15 wk the fluxes of dissolved inorganic N, P and Si ranged from -40 to +200, 0 to 13 and from 30 to 400 ??mol m-2 h-1 respectively. Sediment oxygen demand increased from 10 before to 64 mg O2 m-2 h-1 just after the bloom period. During the bloom, nutrient fluxes represented about 20, 16 and 9% of the Si, P and N requirements for primary production. Before and after the bloom period, Si fluxes contributed up to 30 and > 100% of this requirement and P and N fluxes up to 15 and 50% respectively. Simple empirical models explain most of the spatial-temporal variability of benthic fluxes of Si, P and NH4 (but not NO3) from 3 predictor variables: sediment porosity, nutrient concentration in bottom waters and chlorophyll content of surficial sediments. These models show that algal blooms influence benthic-pelagic nutrient exchange through 2 processes: (1) depletion of nutrients from the water column (which enhances gradient-driven transports across the sediment-water interface) and (2) sedimentation of labile phytodetritus (which promotes remineralization in or on the surficial sediments). Rates and patterns of nutrient cycling were very different at the shallow and deep study sites, illustrating the challenge of extrapolating measurements of coupled algae-nutrient dynamics to whole ecosystems.

  17. 78 FR 58878 - Safety Zone; San Diego Shark Fest Swim; San Diego Bay, San Diego, CA

    Science.gov (United States)

    2013-09-25

    ... Acronyms DHS Department of Homeland Security FR Federal Register NPRM Notice of Proposed Rulemaking A... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; San Diego Shark Fest Swim; San Diego Bay, San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard...

  18. Fluoroquinolone resistance: relation between drug use and evolution of resistance in some Units of the San Bassiano hospital from 2007 to 2008

    Directory of Open Access Journals (Sweden)

    Claudia Mascotto

    2010-06-01

    Full Text Available There is substantial evidence that the overuse of antibiotics is a major cause for the emergence in antimicrobial resistance. This study analyzes the evolution of antimicrobial resistance to ciprofloxacin and levofloxacin from 2007 to 2008 in some Units of the San Bassiano hospital and compares this evolution among the consumption of the same antibiotics. The study involved the collection of all first isolates in blood, urine and transtracheal samples between 2007 and 2008; three microorganisms were chosen: Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa. Microorganisms investigations concerned Geriatrics, Medicine, Surgery and Intensive Care Unit (ICU with 48, 48, 44 and 10 beds respectively. Identification and antimicrobial susceptibility testing was performed using the Phoenix automated system (Becton Dickinson. If the ciprofloxacin susceptibility was (S and levofloxacin susceptibility was (I/R antimicrobial susceptibility was confirmed by the E-Test method (bioMrieux on Muller Hilton agar and cell density of 0.5 MacFarland. Control strains were E. Coli ATCC 25922, P. aeruginosa ATCC 27853 and S. aureus ATCC 29213. The antibiotics consumed in the hospital between January 2007 and December 2008 were transformed into Defined Daily Dose (DDD, which corresponds to the quantity of antibiotics consumed by a patient in 24 h. Ciprofloxacin and levofloxacin demonstrated a similar pattern of increasing resistance in some units between 2007 and 2008. Fluoroquinolone resistance increase for E. coli, varies from 10% in Geriatrics to 15% in ICU, for S. aureus varies from 15% in Medicine Unit to 5% in ICU. P. aeruginosa maintained the same percentage of resistance from 2007 to 2008, but there was a significantly increase of strains with intermediate sensitivity (I up to 30%. The consumption of Ciprofloxacin didnt increase in any of the units and in some case decreased. The consumption of levofloxacin increased in every units and particularly in ICU it raised from 5100 ev doses in 2007 to 6480 in 2008 and from 0 to 300 doses os (DDD. The increased consumption of levofloxacin in 2008 in ICU could explain the increased of Pseudomonas aeruginosa strains with intermediate sensitivity (I.

  19. 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)

    Rostami B.

    2009-11-01

    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.

  20. 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)

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

    1968-07-01

    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)

  1. San Onofre outages minimizing

    International Nuclear Information System (INIS)

    The program to minimize San Onofre outges is eleborated. The human factors result in two thirds of the outages. The structure faults yield 49% of the incidents; shortcomings in personnel training - 16%; lack of understanding -19%; man-machine interaction - 8%; others -8%. Measures to minimize the outages include upgrading the most dangerous plants, review of operational instructions, additional training of personnel and consideration of incidents reasons

  2. 30 August 2011 - Médecins sans frontières International President U. K Karunakara signing the guest book with Head of International Relations F. Pauss and Adviser for Life Sciences M. Dosanjh; visiting CMS underground experimental area with Collaboration Spokesperson G. Tonelli.

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    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.

  3. 30 January 2012 - Ecuadorian Ambassador Gallegos Chiriboga, Permanent Representative to the United Nations Office and other International Organisations at Geneva and San Francisco de Quito University Vice Chancellor C. Montùfar visiting CMS surface facilities and underground experimental area with CMS Collaboration L. Sulak and Collaboration Deputy Spokesperson T. Camporesi, throughout accompanied by Head of International Relations F. Pauss.

    CERN Multimedia

    Michael Hoch

    2012-01-01

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

  4. 75 FR 55975 - Safety Zone; San Diego Harbor Shark Fest Swim; San Diego Bay, San Diego, CA

    Science.gov (United States)

    2010-09-15

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; San Diego Harbor Shark Fest Swim; San Diego Bay, San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard is establishing a temporary safety zone upon the navigable waters of the San Diego Bay, San Diego, CA, in...

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

    Directory of Open Access Journals (Sweden)

    Katie Tayler-Smith

    2011-02-01

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

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

    Directory of Open Access Journals (Sweden)

    Chad L. Loflen

    2013-11-01

    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.

  7. Lahar-hazard zonation for San Miguel volcano, El Salvador

    Science.gov (United States)

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

    2001-01-01

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

  8. Status of the San Onofre neutrino oscillation experiment

    International Nuclear Information System (INIS)

    The San Onofre experiment is designed to investigate neutrino oscillations in the parameter space suggested by the atmospheric neutrino problem. A liquid-scintillator-based 12-ton detector will be installed at 650 m from the two units of the San Onofre power reactor. For the detection of the anti ve-induced inverse beta decay reaction a novel four-fold coincidence method is used allowing effective suppression of background at the relatively low shallow depth of 25 mwe. We report on the experimental method and demonstrate its feasibility by presenting results from recent test experiments performed with a prototype detector in the Tendon Gallery of the San Onofre Unit 2 reactor

  9. San Francisco Gangs

    OpenAIRE

    Lopez Raygoza, Octavio

    2012-01-01

    San Francisco’s Mission District is a place where urban violence goes along with cupcake stores and high-end restaurants. The Mission District consists of a new wave of businesses and culture, and a large Hispanic community that is threatened by gentrification.  A few Hispanic youth view gang life as a romantic idea to escape from a reality of poverty and what they perceived as disrespect. The current wave of violence is nothing new. The neighborhood has seen Norteños and Sureños rag...

  10. [Brief discussion on "Sanli acupoint for du-fu diseases"].

    Science.gov (United States)

    Zhou, Li; He, Quan; Xin, Yu; Zhang, Hongxing

    2015-07-01

    The connotations of "du-fu" and "Sanli" in "Sanli acupoint for du-fu diseases" are discussed in this paper, which can provide theoretical foundation for the clinical application of "Sanli acupoint for du-fu diseases". Based on ancient literature combined with related theories in the Huangdi Neijing (Yellow Emperor's Canon of Internal Classic), a deep discussion is performed through the relationship between Zusanli (ST 36) and stomach, indication and mechanism of Zusanli (ST 36) on du-fu diseases and comparison between Zusanli (ST 36) and Shousanli (LI 10). It is believed that "du" should be pronounced as "dŭ", meaning stomach, and it indicates that Zusanli (ST 36) is closely related to stomach and spleen when it is used for du-fu diseases; "fu" means abdomen area, including liver-gallbladder, spleen, stomach-intestine, kidney, uterus, triple energizer; "sanli' means exclusively the acupoint of Zusanli (ST 36). PMID:26521594

  11. San Diego's Capital Planning Process

    Science.gov (United States)

    Lytton, Michael

    2009-01-01

    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

  12. Los Angeles og San Francisco

    DEFF Research Database (Denmark)

    Ørstrup, Finn Rude

    1998-01-01

    Kompendium udarbejdet til en studierejse til Los Angeles og San Francisco april-maj 1998 Kunstakademiets Arkitektskole, Institut 3H......Kompendium udarbejdet til en studierejse til Los Angeles og San Francisco april-maj 1998 Kunstakademiets Arkitektskole, Institut 3H...

  13. SAN DIEGO ZOO EDUCATIONAL PROGRAM.

    Science.gov (United States)

    San Diego County Dept. of Education, CA.

    A BROCHURE GEARED TO HELP TEACHERS AND STUDENTS IN THE SAN DIEGO AREA TAKE FULL ADVANTAGE OF THE EDUCATIONAL RESOURCES OF THE SAN DIEGO ZOO IS PRESENTED. THE EDUCATION DEPARTMENT OF THE ZOO EMPLOYS TWO FULL-TIME TEACHERS AND A DRIVER-GUIDE. THE PROGRAM OFFERED IS BRIEFLY DESCRIBED--(1) IN "PRESCHOOL AND FIRST GRADE," INTRODUCTIONS ARE MADE TO…

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

    Science.gov (United States)

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

    2013-12-01

    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.

  15. 78 FR 34895 - Safety Zone; San Francisco Independence Day Fireworks Display, San Francisco Bay, San Francisco, CA

    Science.gov (United States)

    2013-06-11

    ... SECURITY Coast Guard 33 CFR Part 165 Safety Zone; San Francisco Independence Day Fireworks Display, San Francisco Bay, San Francisco, CA AGENCY: Coast Guard, DHS. ACTION: Notice of enforcement of regulation. SUMMARY: The Coast Guard will enforce the safety zones for the San Francisco Independence Day...

  16. San Juan Uchucuanicu: évolution historique

    Directory of Open Access Journals (Sweden)

    1975-01-01

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

  17. 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)

    Gladys Magdalena Rodríguez Funes

    2009-01-01

    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.

  18. 76 FR 55796 - Safety Zone; TriRock Triathlon, San Diego Bay, San Diego, CA

    Science.gov (United States)

    2011-09-09

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; TriRock Triathlon, San Diego Bay, San Diego... safety zone upon the specified navigable waters of the San Diego Bay, San Diego, California, in support of a bay swim in San Diego Harbor. This safety zone is necessary to provide for the safety of...

  19. 75 FR 38412 - Safety Zone; San Diego POPS Fireworks, San Diego, CA

    Science.gov (United States)

    2010-07-02

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; San Diego POPS Fireworks, San Diego, CA... zone on the ] navigable waters of San Diego Bay in support of the San Diego POPS Fireworks. This safety.... Coast Guard Sector San Diego, CA; telephone 619-278- 7262, e-mail Shane.E.Jackson@uscg.mil . If you...

  20. 75 FR 77756 - Safety Zone; San Diego Parade of Lights Fireworks, San Diego, CA

    Science.gov (United States)

    2010-12-14

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; San Diego Parade of Lights Fireworks, San... establishing a safety zone upon the navigable water of the San Diego Bay in San Diego, CA in support of the two San Diego Parade of Lights Fireworks Displays on December 12 and December 19, 2010. This safety...

  1. 33 CFR 165.754 - Safety Zone: San Juan Harbor, San Juan, PR.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Safety Zone: San Juan Harbor, San... Zone: San Juan Harbor, San Juan, PR. (a) Regulated area. A moving safety zone is established in the following area: (1) The waters around Liquefied Petroleum Gas ships entering San Juan Harbor in an area...

  2. 1906 San Francisco, USA Images

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The 1906 San Francisco earthquake was the largest event (magnitude 8.3) to occur in the conterminous United States in the 20th Century. Recent estimates indicate...

  3. Riparian Habitat - San Joaquin River

    Data.gov (United States)

    California Department of Resources — The immediate focus of this study is to identify, describe and map the extent and diversity of riparian habitats found along the main stem of the San Joaquin River,...

  4. Preliminary analysis of SANS data from hydrated cement paste

    International Nuclear Information System (INIS)

    Full text: The microstructure of hydrated cement paste is investigated using the technique of Small Angle Neutron Scattering (SANS). The results from SANS measurements are dependent upon the thicknesses of the target materials. Reduction of target thickness is usually not a practical proposition owing to the difficulty in preparing sufficiently thin cement samples and also to the subsequent low count rates of the scattered beam relative to the transmitted beam. In this paper we present a method of analysis that takes advantage of the process of multiple scattering in thick samples. Using cement specimens, which are of different thicknesses, but are otherwise identical, SANS patterns with different degrees of multiple scattering have been obtained. It is shown how these measurements not only provide information about the shape and size of the scattering entities but also provide absolute values of the scattering contrast between the entities responsible for SANS and the matrix. This method of analysis has been used to analyse SANS data from hydrated cement paste. The data were collected on the Ultra High Resolution SANS Diffractometer at Oak Ridge National Laboratory, USA

  5. Complexities of the San Andreas fault near San Gorgonio Pass: Implications for large earthquakes

    Science.gov (United States)

    Yule, Doug; Sieh, Kerry

    2003-11-01

    Geologic relationships and patterns of crustal seismicity constrain the three-dimensional geometry of the active portions of San Andreas fault zone near San Gorgonio Pass, southern California. Within a 20-km-wide contractional stepover between two segments of the fault zone, the San Bernardino and Coachella Valley segments, folds, and dextral-reverse and dextral-normal faults form an east-west belt of active structures. The dominant active structure within the stepover is the San Gorgonio Pass-Garnet Hill faults, a dextral-reverse fault system that dips moderately northward. Within the hanging wall block of the San Gorgonio Pass-Garnet Hill fault system are subsidiary active dextral and dextral-normal faults. These faults relate in complex but understandable ways to the strike-slip faults that bound the stepover. The pattern of crustal seismicity beneath these structures includes a 5-8 km high east-west striking step in the base of crustal seismicity, which corresponds to the downdip limit of rupture of the 1986 North Palm Springs earthquake. We infer that this step has been produced by slip on the linked San Gorgonio Pass-Garnet Hill-Coachella Valley Banning (SGP-GH-CVB) fault. This association enables us to construct a structure contour map of the fault plane. The large step in the base of seismicity downdip from the SGP-GH-CVB fault system probably reflects a several kilometers offset of the midcrustal brittle-plastic transition. (U/Th)/He thermochronometry supports our interpretation that this south-under-north thickening of the crust has created the region's 3 km of topographic relief. We conclude that future large earthquakes generated along the San Andreas fault in this region will have a multiplicity of mostly specifiable sources having dimensions of 1-20 km. Two tasks in seismic hazard evaluation may now be attempted with greater confidence: first, the construction of synthetic seismograms that make useful predictions of ground shaking, and second, theoretical investigations of the role of this complexity in retarding the propagation of future seismic ruptures.

  6. Characterization of the grafting copolymer EPDM-SAN; Caracterizacao do copolimero de enxertia EPDM-SAN

    Energy Technology Data Exchange (ETDEWEB)

    Turchette, Renato; Felisberti, Maria Isabel [Universidade Estadual de Campinas, SP (Brazil). Inst. de Quimica]. E-mail: turchete@iqm.unicamp.br

    2001-07-01

    This work aims the characterization of the grafting copolymer EPDM-SAN. This copolymer presents a fraction of free SAN chains, which was extracted by solubilization in chloroform followed of precipitation of the grafting copolymer EPDM-g-SAN in acetone. The EPDM-SAN and EPDM-g-SAN were characterized by {sup 13}C NMR, DSC, TGA and SEM. EPDM-SAN contain 23 wt% of free SAN and 77 wt% of EPDM-g-SAN. Both materials are heterogeneous and the thermal and thermo-oxidative degradation are independent of the composition. (author)

  7. Should I stay or should I go? A study of human mobility patterns and their relation to socio-economic development in San Phranet, peri-urban Chiang Mai

    OpenAIRE

    Hayward, D.

    2015-01-01

    The objective of this Masters thesis is to add to the debate on the relationship between mobility and development. Through the case study of San Phranet, a peri-urban sub-district of Chiang Mai city in northern Thailand, linkages between three fields were scrutinised: Human mobility: the movement of individuals and groups of people over space and time. Local capital development: the acquisition, maintenance and exchange of household capital assets, namely human, financial, natural...

  8. Lipid sorting revealed by SANS

    International Nuclear Information System (INIS)

    We have investigated the lipid sorting in a binary small unilamellar vesicle (SUV) composed of cone-shaped (1,2-dihexanoyl-sn-glycero-3-phosphocholine: DHPC) and cylinder-shaped (1,2-dipalmitoyl-sn-glycero-3-phosphocholine: DPPC) lipids. In order to reveal the lipid sorting we adopted a contrast matching technique of small angle neutron scattering (SANS), which extracts the distribution of deuterated lipids in the bilayer quantitatively. The SANS profile of deuterated SUVs at the contrast matching condition showed a characteristic scattering profile, indicating an asymmetric distribution of cone-shaped lipids in the bilayer. The fitting of the observed SANS profile revealed that most DHPC molecules are localized in the outer leaflet, which supports that the shape of the lipid is strongly coupled with the membrane curvature. We compared the obtained asymmetric distribution of the cone-shaped lipids in the bilayer with the theoretical prediction based on the curvature energy model. (author)

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

    Science.gov (United States)

    Pamo, Billies

    2011-01-01

    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

  10. 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

    ... affecting 110.224, see the List of CFR Sections Affected, which appears in the Finding Aids section of the... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false San Francisco Bay, San Pablo Bay, Carquinez Strait, Suisun Bay, Sacramento River, San Joaquin River, and connecting waters, CA....

  11. 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

  12. Vegetation - San Felipe Valley [ds172

    Data.gov (United States)

    California Department of Resources — This Vegetation Map of the San Felipe Valley Wildlife Area in San Diego County, California is based on vegetation samples collected in the field in 2002 and 2005...

  13. The San Bernabe power substation; La subestacion San Bernabe

    Energy Technology Data Exchange (ETDEWEB)

    Chavez Sanudo, Andres D. [Luz y Fuerza del Centro, Mexico, D. F. (Mexico)

    1997-12-31

    The first planning studies that gave rise to the San Bernabe substation go back to year 1985. The main circumstance that supports this decision is the gradual restriction for electric power generation that has been suffering the Miguel Aleman Hydro System, until its complete disappearance, to give priority to the potable water supply through the Cutzamala pumping system, that feeds in an important way Mexico City and the State of Mexico. In this document the author describes the construction project of the San Bernabe Substation; mention is made of the technological experiences obtained during the construction and its geographical location is shown, as well as the one line diagram of the same [Espanol] Los primeros estudios de planeacion que dieron origen a la subestacion San Bernabe se remontan al ano de 1985. La circunstancia principal que soporta esta decision es la restriccion paulatina para generar energia que ha venido experimentando el Sistema Hidroelectrico Miguel Aleman, hasta su desaparicion total, para dar prioridad al suministro de agua potable por medio del sistema de bombeo Cutzamala, que alimenta en forma importante a la Ciudad de Mexico y al Estado de Mexico. En este documento el autor describe el proyecto de construccion de la subestacion San Bernabe; se mencionan las experiencias tecnologicas obtenidas durante su construccion y se ilustra su ubicacion geografica, asi como un diagrama unifilar de la misma

  14. 77 FR 42647 - Safety Zone: San Diego Symphony POPS Fireworks; San Diego, CA

    Science.gov (United States)

    2012-07-20

    ... FR Federal Register NPRM Notice of Proposed Rulemaking A. Regulatory History and Information The... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone: San Diego Symphony POPS Fireworks; San... establishing a safety zone on the navigable waters of San Diego Bay in support of the San Diego Symphony...

  15. 76 FR 45693 - Safety Zone; San Diego POPS Fireworks, San Diego, CA

    Science.gov (United States)

    2011-08-01

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; San Diego POPS Fireworks, San Diego, CA... temporary safety zone on the navigable waters of San Diego Bay in support of the San Diego POPS Fireworks... rule, call or e-mail Petty Officer Shane Jackson, Waterways Management, U.S. Coast Guard Sector...

  16. 76 FR 75908 - Notice of Inventory Completion: The University of California, San Diego, San Diego, CA

    Science.gov (United States)

    2011-12-05

    ... National Park Service Notice of Inventory Completion: The University of California, San Diego, San Diego... California on behalf of the University of California, San Diego, have completed an inventory of human remains... contact the University of California, San Diego. Disposition of the human remains and associated...

  17. 76 FR 46352 - Approval of Noise Compatibility Program for San Diego International, San Diego, CA

    Science.gov (United States)

    2011-08-02

    ... Federal Aviation Administration Approval of Noise Compatibility Program for San Diego International, San... Administration (FAA) announces its findings on the noise compatibility program submitted by San Diego Regional... maps submitted by San Diego Regional Airport Authority under Part 150 were in compliance...

  18. 77 FR 46115 - Notice of Inventory Completion: San Diego Museum of Man, San Diego, CA

    Science.gov (United States)

    2012-08-02

    ... National Park Service Notice of Inventory Completion: San Diego Museum of Man, San Diego, CA AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The San Diego Museum of Man has completed an... contact the San Diego Museum of Man. Repatriation of the human remains to the Indian tribe stated...

  19. 27 CFR 9.56 - San Lucas.

    Science.gov (United States)

    2010-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 1 2010-04-01 2010-04-01 false San Lucas. 9.56 Section 9... TREASURY LIQUORS AMERICAN VITICULTURAL AREAS Approved American Viticultural Areas § 9.56 San Lucas. (a) Name. The name of the viticultural area described in this section is “San Lucas.” (b) Approved...

  20. Radiation accident in San Salvador

    International Nuclear Information System (INIS)

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

  1. San Onofre unit 1 decommissioning

    International Nuclear Information System (INIS)

    Nuclear plant decommissioning presents several challenges in radiation protection. The plant demolition must consider radiation protection for workers, protection of the public and careful material management. Decommissioning of the San Onofre Nuclear Generating Station (SONGS) Unit 1 presented some additional challenges. (author)

  2. Velocity selector for SANS spectrometer

    International Nuclear Information System (INIS)

    Mechanical velocity selector, designed firstly at the beginning of the neutron age (the end of 40-th - 50-th, see and references herein) are nowadays of wide use at SANS spectrometers on steady state neutron sources. The present report is devoted to the description of the construction and parameters of the selector, designed for SANS spectrometer at the 1 MW research reactor (URGN, Draria, Algeria). The design of selector provides high transmission (more then 90%) and wavelength resolution of Δλ,/λ ∼ 14%, allowing the neutron wavelength to be selected between 4 A and 10 A. The rotor of selector is an aluminium cylinder rotating in a vacuum jacket around the horizontal axis. The rotor slits of helical shape are formed by absorbing plates with thickness 0.5 mm and made of Gd (10%)-Al alloy. (author)

  3. Application of the Sea-Level Affecting Marshes Model (SLAMM 6) to San Pablo Bay NWR

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This SeaLevel Affecting Marshes Model SLAMM report presents a model for projecting the effects of sealevel rise on coastal marshes and related habitats on San Pablo...

  4. Capteur Tridimensionnel Sans Contact

    Science.gov (United States)

    Magnant, D.

    1986-07-01

    Three-dimensionnal measurements on human body using a scanning laser beam. The active optical apparatus principle and the image data processing giving three dimensional informations of complex forms is presented. The output is given in terms of one or several files of real coordinates. The basic components of this system are : A light-sheet which is generated by a laser source and, the optical sensors (cameras) with corresponding hard-soft extractor; This 3D sensorial system is especially adapted to partial or total acquisitions of body coordinates. The main advantages are : - Vision and measurement capability of complete accessible contours without shadow areas. - The real time data acquisition and scanning of the object in a few seconds. - The access to distance measurements between significant points. - The presently obtained accuracy is better than 1/1000 in relatives units and lower than one MM absolute. - Physically stuck markers on body are not necessary. - The monochromaticity of the laser light source allows the use of a color filter over the detector (camera) for ambient light rejection. - The fully programmable capability for any use, allows the adaptation to a large variety of particular cases. - The hardware open system offers many options. - The hard-soft tool is designed for auto-calibration operation. - The system offers easy connection to a host computer or a production robot.

  5. 77 FR 34988 - Notice of Inventory Completion: San Diego State University, San Diego, CA

    Science.gov (United States)

    2012-06-12

    ...: National Park Service, Interior. ACTION: Notice. SUMMARY: San Diego State University Archeology Collections... associated funerary objects may contact San Diego State University Archeology Collections Management Program... Diego State University Archeology Collections Management Program at the address below by July 12,...

  6. 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

  7. Multiple-channel collimation for improved performance of SANS instruments

    International Nuclear Information System (INIS)

    Complete text of publication follows. Small Angle Neutron Scattering (SANS) is a powerful technique for the investigation of the submicrometer structure of condensed matter, and has found important applications in materials science and engineering, solid state physics, polymer research and biological sciences. SANS facilities are currently heavily demanded and several new such instruments are planned for installation. However, the existing facilities, due to the design adopted for the layout as well as the mode in which they operate can, in general, be upgraded. An analytical study is presented on the performance of a SANS instrument equipped with a multi-aperture pinhole collimator. This collimation can provide large count rate gains, which might attain one order of magnitude, for the usual resolution required in SANS measurements. Both pulsed and steady-state neutron sources are considered in the study. For pulsed source installation such collimation was found to be ideal because is not only provides the optimisation of count rate and resolution but it also avoids the problem of frame overlap, as relatively small collimation lengths are required. For steady-state neutron source installation the referred optimisation is achieved but the versatility in reciprocal space range becomes reduced. Finally, a new type of honeycomb collimator based on the results presented is proposed. (author)

  8. 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)

    El Arem, S.

    2006-01-15

    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)

  9. Cuartel San Carlos. Yacimiento veterano

    Directory of Open Access Journals (Sweden)

    Mariana Flores

    2007-01-01

    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.

  10. Downtown revitalization in San Salvador

    OpenAIRE

    Ejeborn, Elisabet; Nedersjö, Julia

    2012-01-01

    The aim of this master’s thesis in spatial planning is to research the conditions in the historic city centre of San Salvador and make a strategy and urban design proposal for the area, but also to investigate the relationship between economic development, public institutions and the public space in this area. The research has been done through literature studies on El Salvador and formal/informal economy, onsite inventory, studies of good examples and interviews with people in the area. In t...

  11. SANS from interpenetrating polymer networks

    International Nuclear Information System (INIS)

    Full text: Interpenetrating polymer networks (IPNs) have been formed by combining two polymeric systems in order to gain enhanced material properties. IPNs are a combination of two or more polymers in network form with one network polymerised and/or crosslinked in the immediate presence of the other(s).1 IPNs allow better blending of two or more crosslinked networks. In this study two sets of IPNs were produced and their microstructure studied using a variety of techniques including small angle neutron scattering (SANS). The first system combined a glassy polymer (polystyrene) with an elastomeric polymer (SBS) with the glassy polymer predominating, to give a high impact plastic. The second set of IPNs contained epichlorohydrin (CO) and nitrile rubber (NBR), and was formed in order to produce novel materials with enhanced chemical and gas barrier properties. In both cases if the phase mixing is optimised the probability of controlled morphologies and synergistic behaviour is increased. The PS/SBS IPNs were prepared using sequential polymerisation. The primary SBS network was thermally crosslinked, then the polystyrene network was polymerised and crosslinked using gamma irradiation to avoid possible thermal degradation of the butadiene segment of the SBS. Tough transparent systems were produced with no apparent thermal degradation of the polybutadiene segments. The epichlorohydrin/nitrile rubber IPNs were formed by simultaneous thermal crosslinking reactions. The epichlorohydrin network was formed using lead based crosslinker, while the nitrile rubber was crosslinked by peroxide methods. The use of two different crosslinking systems was employed in order to achieve independent crosslinking thus resulting in an IPN with minimal grafting between the component networks. SANS, Transmission electron microscopy (TEM), and atomic force microscopy (AFM) were used to examine the size and shape of the phase domains and investigate any variation with crosslinking level and irradiation dose. SANS proved extremely useful for examining the size and shape of the phase domains in these IPNs. We have examined a range of both thermal and radiation crosslinked IPNs using SANS facilities at ANSTO and NIST. Selected samples were sectioned into 1mm strips and stacked to form a composite sample to examine in-plane structure.2 The examination of some of the samples in two perpendicular directions greatly assisted structure determination. New results from real-time thermal polymerisation experiments will also be discussed

  12. Beneficial Reuse of San Ardo Produced Water

    Energy Technology Data Exchange (ETDEWEB)

    Robert A. Liske

    2006-07-31

    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.

  13. 77 FR 28618 - Notice of Availability of the San Diego Gas & Electric Ocotillo Sol Solar Project Draft...

    Science.gov (United States)

    2012-05-15

    ... Bureau of Land Management Notice of Availability of the San Diego Gas & Electric Ocotillo Sol Solar... San Diego Gas & Electric (SDG&E) Ocotillo Sol Solar Project in Imperial County, California, and by.... ADDRESSES: You may submit comments related to the SDG&E Ocotillo Sol Solar Project by any of the...

  14. Sfida dentro il San Giusto

    Directory of Open Access Journals (Sweden)

    Fulvio Bernardini

    2013-12-01

    Full Text Available The planning of sustainable mobility is one of the exercises that for claim has entered on the agenda of European municipalities. Reduce air pollution and the use of cars and to provide citizens more efficient movements, limit traffic congestion and degradation of urban areas; these and other aspects are theguidelines on which are standardizing the major cities of the oldcontinent. Trieste, an Italian city over 200,000 inhabitants located in the north-eastern border of the peninsula, is  historically a bridge between Western and the south-central Europe. Trieste is one of the city that is better incorporating the needs of sustainable mobility, thanks to its central European character. In 2010, the Municipality of Trieste has embarked on the construction of the Park San Giusto, a futuristic solution for the parking of cars: once completed, it will be the largest park in the cave in Italy and the second in Europe, the cars will be a total of 718 on 5 levels buried beneath the hill of San Giusto , in the historic center of Trieste.

  15. San Diego's High School Dropout Crisis

    Science.gov (United States)

    Wilson, James C.

    2012-01-01

    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

  16. 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)

  17. 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 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

  18. Characterization of the grafting copolymer EPDM-SAN

    International Nuclear Information System (INIS)

    This work aims the characterization of the grafting copolymer EPDM-SAN. This copolymer presents a fraction of free SAN chains, which was extracted by solubilization in chloroform followed of precipitation of the grafting copolymer EPDM-g-SAN in acetone. The EPDM-SAN and EPDM-g-SAN were characterized by 13C NMR, DSC, TGA and SEM. EPDM-SAN contain 23 wt% of free SAN and 77 wt% of EPDM-g-SAN. Both materials are heterogeneous and the thermal and thermo-oxidative degradation are independent of the composition. (author)

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

    Science.gov (United States)

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

    2008-01-01

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

  20. 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.

  1. SANS study of asphaltene aggregation

    International Nuclear Information System (INIS)

    The colloidal properties of asphaltenes affects their solubility, reactivity and transport properties. We have been investigating the molecular basis for the aggregation of asphaltenes in toluene through the use of Small Angle Neutron Scattering (SANS), in which the hydrogen nucleus provides the strongest scatterer, and the contrast may be varied by deuterium replacement. The measured intensity curves can be fitted with a elongated particle. Both radius of gyration and molecular weight are significantly decreased upon increasing temperature, indicating a disaggregation rather than a conformational change mechanism. Thus, the ''true'' molecular weight of asphaltenes is much less than that measured at room temperature, and appears to be ≤6000. The internal structure is probably complex enough so that a simple description in terms of colloidal or micellar structures is not granted

  2. Comportamiento de los defectos congnitos en San Luis / Behavior of congenital defects in San Luis municipality

    Scientific Electronic Library Online (English)

    Hernn, Pereda Chvez; Francisco, Delgado Aguiar; Mara del Carmen, Morejn; Yesenia, Prez Expsito; Ledys Mabel, Hernndez Fernndez.

    2012-08-01

    Full Text Available Introduccin: Con el perfeccionamiento de los cuidados obsttricos y neonatales, los defectos congnitos al nacer han condicionado a un aumento relativo en la morbimortalidad infantil a nivel mundial. Objetivo: Evaluar la incidencia de malformaciones congnitas en el municipio San Luis en el periodo [...] 2000-2009, as como clasificarlas segn aparatos o sistemas, precisando la efectividad del diagnstico prenatal, la decisin tomada por la pareja una vez diagnosticada y su repercusin sobre la mortalidad infantil. Material y mtodo: Se realiz un estudio retrospectivo y descriptivo de los defectos congnitos diagnosticados prenatalmente y despus del nacimiento pertenecientes al policlnico "Epifanio Rojas Gil" del municipio San Luis en el perodo 2000-2009, utilizando los libros de registro de diagnstico prenatal ubicados en el servicio de gentica y se enriqueci con los casos evaluados en consulta de gentica clnica. Resultados: La incidencia de defectos congnitos disminuy en el segundo quinquenio, con un mejor control y seguimiento de las mujeres en edad frtil y gestantes. La mayora de los defectos fueron diagnosticados prenatalmente (60%) siendo el ultrasonido y el alfafeto protena medios diagnsticos muy efectivos principalmente en los ltimos cinco aos. Las malformaciones cardiovasculares, y los defectos de cierre del tubo neural resultaron las ms frecuentes. La tasa de mortalidad infantil debida a defectos congnitos fue baja, siendo el ao 2003 el de mayor incidencia con un predominio del sistema cardiovascular, no reportndose en el ltimo quinquenio. Conclusiones: La descentralizacin de los servicios permiti una mejor prevencin, diagnstico precoz y supervivencia de los recin nacidos con defecto congnito 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.

  3. Comportamiento de los defectos congnitos en San Luis Behavior of congenital defects in San Luis municipality

    Directory of Open Access Journals (Sweden)

    Hernn Pereda Chvez

    2012-08-01

    Full Text Available Introduccin: Con el perfeccionamiento de los cuidados obsttricos y neonatales, los defectos congnitos al nacer han condicionado a un aumento relativo en la morbimortalidad infantil a nivel mundial. Objetivo: Evaluar la incidencia de malformaciones congnitas en el municipio San Luis en el periodo 2000-2009, as como clasificarlas segn aparatos o sistemas, precisando la efectividad del diagnstico prenatal, la decisin tomada por la pareja una vez diagnosticada y su repercusin sobre la mortalidad infantil. Material y mtodo: Se realiz un estudio retrospectivo y descriptivo de los defectos congnitos diagnosticados prenatalmente y despus del nacimiento pertenecientes al policlnico "Epifanio Rojas Gil" del municipio San Luis en el perodo 2000-2009, utilizando los libros de registro de diagnstico prenatal ubicados en el servicio de gentica y se enriqueci con los casos evaluados en consulta de gentica clnica. Resultados: La incidencia de defectos congnitos disminuy en el segundo quinquenio, con un mejor control y seguimiento de las mujeres en edad frtil y gestantes. La mayora de los defectos fueron diagnosticados prenatalmente (60% siendo el ultrasonido y el alfafeto protena medios diagnsticos muy efectivos principalmente en los ltimos cinco aos. Las malformaciones cardiovasculares, y los defectos de cierre del tubo neural resultaron las ms frecuentes. La tasa de mortalidad infantil debida a defectos congnitos fue baja, siendo el ao 2003 el de mayor incidencia con un predominio del sistema cardiovascular, no reportndose en el ltimo quinquenio. Conclusiones: La descentralizacin de los servicios permiti una mejor prevencin, diagnstico precoz y supervivencia de los recin nacidos con defecto congnito 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.

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

    Science.gov (United States)

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

    2007-01-01

    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.

  5. Evaluacin de los planes curriculares y slabos de las asignaturas de la Facultad de Medicina de la UNMSM, sobre la atencin integral de salud a personas afectadas por la violencia / Assessment of Faculty of Medicine, Universidad Nacional Mayor de San Marcos curricula and syllabi on subjects related to integral health care of persons affected by violence

    Scientific Electronic Library Online (English)

    Eva, Miranda; Fausto, Garmendia; Alberto, Perales; Pedro, Mendoza; Jorge, Miano; Walter, Caldern.

    2009-12-01

    Full Text Available Propsito: En el ao 2005 se realiz un Estudio de Lnea de Base en la Facultad de Medicina de la Universidad Nacional Mayor de San Marcos (UNMSM) para conocer la realidad de la formacin de los alumnos del pregrado sobre conocimientos y competencias relacionados a la violencia y violacin de derech [...] os humanos (DDHH), bajo la hiptesis que este problema nacional de salud no haba sido considerado en forma adecuada y suficiente en los planes curriculares de la Facultad de Medicina. Objetivos: Diagnosticar el proceso de enseanza-aprendizaje de la Facultad de Medicina sobre la atencin integral de salud a personas afectadas por efectos de la violencia y violacin de los derechos humanos. Diseo: Estudio descriptivo, transversal evaluativo de anlisis. Institucin: Facultad de Medicina, Universidad Nacional Mayor de San Marcos. Materiales: Planes de estudios de las 5 escuelas acadmico profesionales (EAP) de la Facultad. Intervenciones: Por juicio de un grupo de expertos, se seleccion 81 asignaturas que, por sus caractersticas, deban contener temas relacionados con la violencia y violacin de los derechos humanos (DDHH). Se analiz los slabos de las asignaturas seleccionadas. Se efectu coordinaciones con los directores de las 5 Escuelas Acadmico Profesionales. Se realiz presentaciones de los objetivos de la investigacin y del Programa a los coordinadores de los departamentos de Psiquiatra, Medicina, Ciruga, Ginecologa y Obstetricia, Pediatra, Medicina Preventiva y Salud Pblica, as como entrevistas a docentes interesados en el tema de violencia y violacin de los DDHH. A los docentes que acudieron a la entrevista se les indag sobre su conocimiento, experiencia e inters sobre los temas sealados y se les explic las caractersticas del Programa, con la finalidad de seleccionarlos para una futura capacitacin. Principales medidas de resultados: Contenido sobre violencia en los slabos de las escuelas acadmico profesionales. Resultados: El estudio demostr que solo 30/81 slabos (37%) tena algn contenido sobre violencia, de los cuales corresponda a la EAP de Medicina 9/19 (47,3%), EAP de Obstetricia 9/20 (45%), EAP de Enfermera 5/12 (41,6%), EAP de Tecnologa Mdica 6/19 (31,5%) y la EAP de Nutricin 1/11 (9,1%). Conclusiones: Estos resultados demostraron la validez de la hiptesis, que efectivamente exista un vaco en la formacin de los futuros profesionales de la salud respecto a sus conocimientos y competencias sobre violencia. Abstract in english Aims: In 2005 a baseline study was conducted in order to know the curricular plans and syllabi contents of the Faculty of Medicine, Universidad Nacional Mayor de San Marcos, related to violence health disorders given to undergraduate students of the 5 Academic Professional Schools (APS), under the h [...] ypothesis that this national health problem has not been considered sufficiently and adequately in the curricular plans of the Faculty. Objectives: To determine the Faculty of Medicines teaching-learning process on integral health care to persons affected by violence and human rights violation. Design: Descriptive, transversal evaluative analysis. Setting: Faculty of Medicine, Universidad Nacional Mayor de San Marcos, Lima, Peru. Materials: Curricular plans of the 5 Facultys academic professional schools. Interventions: A total of 81 syllabi courses were considered would have contents on themes related to violence. Coordination work with the directors of the Academic Professional Schools of Medicine, Midwifes, Nursery, Medical Technology and Nutrition was carried out. Formal presentations of the objectives of the Program and this research were done to the Department heads of Medicine, Surgery, Pediatrics, Gynecology-Obstetrics, Psychiatry, Preventive Medicine and Public Health. Interviews to professors to determine their knowledge, experience and interest in the field of violence were conducted as to consider future training. Main outcome measures: Academic professional scho

  6. Rate Analysis of Two Photovoltaic Systems in San Diego

    Energy Technology Data Exchange (ETDEWEB)

    Doris, E.; Ong, S.; Van Geet, O.

    2009-07-01

    Analysts have found increasing evidence that rate structure has impacts on the economics of solar systems. This paper uses 2007 15-minute interval photovoltaic (PV) system and load data from two San Diego City water treatment facilities to illustrate impacts of different rate designs. The comparison is based on rates available in San Diego at the time of data collection and include proportionately small to large demand charges (relative to volumetric consumption), and varying on- and off- peak times. Findings are twofold for these large commercial systems: 1) transferring costs into demand charges does not result in savings and 2) changes in peak times do not result in a major cost difference during the course of a year. While lessons learned and discussion on rate components are based on the findings, the applicability is limited to buildings with similar systems, environments, rate options, and loads.

  7. Comparison of pinhole collimation and focusing optics for SANS

    Science.gov (United States)

    Glinka, C. J.; Barker, J. G.; Mildner, D. F. R.

    2015-09-01

    We examine quantitatively the instrumental factors that affect the theoretical performance and practical application of conventional pinhole collimation and focusing optics for small-angle neutron scattering (SANS) measurements. We calculate the relative performance of pinhole collimation vis-à-vis focusing by grazing incidence elliptical mirrors and compare the results with a recent ray-tracing simulation to show that the performance gains due to focusing found in the simulation arise largely from assuming a much larger sample size. We also compare measurements of the parasitic scattering from pinhole collimation with that from focusing cylindrical quartz mirrors, and a focusing refractive optic, to stress the importance of signal-to-noise as the true measure of performance for SANS instruments.

  8. SANS studies of micellar and magnetic fluids

    International Nuclear Information System (INIS)

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

  9. CIRSS vertical data integration, San Bernardino study

    Science.gov (United States)

    Hodson, W.; Christenson, J.; Michel, R. (Principal Investigator)

    1982-01-01

    The creation and use of a vertically integrated data base, including LANDSAT data, for local planning purposes in a portion of San Bernardino County, California are described. The project illustrates that a vertically integrated approach can benefit local users, can be used to identify and rectify discrepancies in various data sources, and that the LANDSAT component can be effectively used to identify change, perform initial capability/suitability modeling, update existing data, and refine existing data in a geographic information system. Local analyses were developed which produced data of value to planners in the San Bernardino County Planning Department and the San Bernardino National Forest staff.

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

    Science.gov (United States)

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

    2004-01-01

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

  11. Small angle neutron scattering (SANS and V-SANS) study of asphaltene aggregates in crude oil.

    Science.gov (United States)

    Headen, Thomas F; Boek, Edo S; Stellbrink, Jörg; Scheven, Ulrich M

    2009-01-01

    We report small angle neutron scattering (SANS) experiments on two crude oils. Analysis of the high-Q SANS region has probed the asphaltene aggregates in the nanometer length scale. We find that the radius of gyration decreases with increasing temperature. We show that SANS measurements on crude oils give similar aggregate sizes to those found from SANS measurements of asphaltenes redispersed in deuterated toluene. The combined use of SANS and V-SANS on crude oil samples has allowed the determination of the radius of gyration of large scale asphaltene aggregates of approximately 0.45 microm. This has been achieved by the fitting of Beaucage functions over two size regimes. Analysis of the fitted Beaucage functions at very low-Q has shown that the large scale aggregates are not simply made by aggregation of all the smaller nanoaggregates. Instead, they are two different aggregates coexisting. PMID:19063643

  12. Vabariigi aastapev San Franciscos / Heino Valvur ; foto: Heino Valvur

    Index Scriptorium Estoniae

    Valvur, Heino

    2006-01-01

    veebruarikuu mdus San Franciscos Eesti Vabariigi 88. aastapeva phitsedes: traditsiooniliselt thistas aastapeva San Francisco Seenioride Klubi koosviibimisega, E.E.L.K. San Francisco koguduses peeti jumalateenistus ja koosviibimine, kus noored esitasid rahvalaule, San Francisco Eesti Selts thistas aastapeva 25. veebruaril aktuse ja koosviibimisega

  13. Backscatter B [7125]--Offshore San Gregorio, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior This part of SIM 3306 presents data for the acoustic-backscatter map (see sheet 3, SIM 3306) of the Offshore of San Gregorio map area, California. Backscatter data...

  14. Habitat--Offshore of San Francisco, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the habitat map of the seafloor of the Offshore of San Francisco map area, California. The vector data file is included in...

  15. San Antonio Bay 1986-1989

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The effect of salinity on utilization of shallow-water nursery habitats by aquatic fauna was assessed in San Antonio Bay, Texas. Overall, 272 samples were collected...

  16. Historical methyl mercury in San Francisco Bay

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — San Francisco Bay, California is considered a mercury-impaired watershed. Elevated concentrations of mercury are found in water and sediment as well as fish and...

  17. Bathymetry--Offshore San Gregorio, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior This part of SIM 3306 presents data for the bathymetry and shaded-relief maps (see sheet 1 and 2, SIM 3306) of the Offshore of San Gregorio map area, California....

  18. Contours--Offshore of San Francisco, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of San Francisco map area, California. The vector data file...

  19. San Onofre's work controls planning program

    International Nuclear Information System (INIS)

    In this paper an overview of San Onofre's Health Physics Work Controls Planning Program is presented. The program provides the Health Physics Technician with guidance and support for covering jobs with significant radiological risks

  20. Backscatter A [8101]--Offshore San Gregorio, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior This part of SIM 3306 presents data for the acoustic-backscatter map (see sheet 3, SIM 3306) of the Offshore of San Gregorio map area, California. Backscatter data...

  1. San Bernardino National Wildlife Refuge contaminant study

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The San Bernardino National Wildlife Refuge was established in 1982 for the protection and management of endangered desert fishes which are indigenous to the Rio...

  2. San Francisco Bay Water Quality Improvement Fund

    Data.gov (United States)

    U.S. Environmental Protection Agency — The San Francisco Bay Water Quality Improvement Fund is a competitive grant program that is helping implement TMDLs to improve water quality, protect wetlands, and...

  3. 33 CFR 165.1102 - Security Zone; Naval Base Point Loma; San Diego Bay, San Diego, CA.

    Science.gov (United States)

    2010-07-01

    .... (b) Regulations. (1) The general regulations governing security zones found in 33 CFR 165.33 apply to... Loma; San Diego Bay, San Diego, CA. 165.1102 Section 165.1102 Navigation and Navigable Waters COAST... Guard District 165.1102 Security Zone; Naval Base Point Loma; San Diego Bay, San Diego, CA....

  4. 75 FR 55270 - Safety Zone; NASSCO Launching of USNS Washington Chambers, San Diego Bay, San Diego, CA

    Science.gov (United States)

    2010-09-10

    ... Chambers, San Diego Bay, San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard is establishing a temporary safety zone on the navigable waters of the San Diego Bay in... the Port (COTP) San Diego or his designated representative. DATES: This rule is effective from 9:15...

  5. 33 CFR 165.776 - Security Zone; Coast Guard Base San Juan, San Juan Harbor, Puerto Rico

    Science.gov (United States)

    2010-07-01

    ... San Juan, San Juan Harbor, Puerto Rico 165.776 Section 165.776 Navigation and Navigable Waters COAST... Guard District 165.776 Security Zone; Coast Guard Base San Juan, San Juan Harbor, Puerto Rico (a... artificial contrivance used, or capable of being used, as a means of transportation on water, except...

  6. The Cape San Blas Ecological Study

    OpenAIRE

    Lamont, Margaret M.; Percival, H. Franklin; Pearlstine, Leonard G.; Colwell, Sheila V.; Kitchens, Wiley M.; Carthy, Raymond R.

    1997-01-01

    Eglin AFB on Cape San Blas consists of approximately 250 acres located about 180 miles east of the main Eglin reservation. This area lies on the S1. Joseph peninsula, part of a dynamic barrier island chain that extends across the northern Gulf of Mexico. Due to the natural forces that formed Cape San Blas and those that maintain this area, St. Joseph Peninsula has experienced severe land form change over time (see GIS land form change maps). These changes allow for fluctuations...

  7. 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 Netherlands Antilles and other Caribbean islands, with which it also shows a great similarity in the composition of the molluscan fauna.

  8. SANS Study of Static Structure of The Double Network Polymers

    Science.gov (United States)

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

    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.

  9. SANS facility at the Pitesti 14MW Triga reactor

    International Nuclear Information System (INIS)

    The SANS configuration with mechanical monochromator has significantly increased luminosity while the spatial extension of the instrument is quite reasonable. Tacking account that TRIGA reactor existing at INR Pitesti is a medium flux reactor and that the available dimension for the SANS instrument is severely limited by the dimensions of the room where the instrument has to be installed, this experimental configuration has been chosen as the most suited for the situation existing in our institute. For usual collimation values of about 30 minutes, and for an inclination angle of the monochromator axis of about 2-3 degrees, Dl/l is about 20-30%, i.e. quite reasonable value. The sample width may be fixed between 10 mm and 20 mm. The minimum value of the scattering vector is Qmin = 0.005 A-0-1 while the maximal value is Qmax = 0.5 A-0-1. The relative error is ΔQ/Qmin = 0.5. In the case of our SANS instrument a monochromatic neutron beam with 1.5 A-0 ≤ λ ≤ 5 A-0 is produced by a mechanical velocity selector with helical slots. The distance between sample and detectors plane is (5.2 m). (author)

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

    Directory of Open Access Journals (Sweden)

    Argota, George

    2013-07-01

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

  11. Geothermal resource assessment of western San Luis Valley, Colorado

    Energy Technology Data Exchange (ETDEWEB)

    Zacharakis, Ted G.; Pearl, Richard Howard; Ringrose, Charles D.

    1983-01-01

    The Colorado Geological Survey initiated and carried out a fully integrated assessment program of the geothermal resource potential of the western San Luis Valley during 1979 and 1980. The San Luis Valley is a large intermontane basin located in southcentral Colorado. While thermal springs and wells are found throughout the Valley, the only thermal waters found along the western part of the Valley are found at Shaw Warm Springs which is a relatively unused spring located approximately 6 miles (9.66 km) north of Del Norte, Colorado. The waters at Shaws Warm Spring have a temperature of 86 F (30 C), a discharge of 40 gallons per minute and contain approximately 408 mg/l of total dissolved solids. The assessment program carried out din the western San Luis Valley consisted of: soil mercury geochemical surveys; geothermal gradient drilling; and dipole-dipole electrical resistivity traverses, Schlumberger soundings, Audio-magnetotelluric surveys, telluric surveys, and time-domain electro-magnetic soundings and seismic surveys. Shaw Warm Springs appears to be the only source of thermal waters along the western side of the Valley. From the various investigations conducted the springs appear to be fault controlled and is very limited in extent. Based on best evidence presently available estimates are presented on the size and extent of Shaw Warm Springs thermal system. It is estimated that this could have an areal extent of 0.63 sq. miles (1.62 sq. km) and contain 0.0148 Q's of heat energy.

  12. San Onofre Unit 1 decommissioning

    International Nuclear Information System (INIS)

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

  13. The performance of magnetic lens for focusing VCN-SANS.

    Energy Technology Data Exchange (ETDEWEB)

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

    2011-01-01

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

  14. The performance of magnetic lens for focusing VCN-SANS

    Energy Technology Data Exchange (ETDEWEB)

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

    2011-04-01

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

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

    Science.gov (United States)

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

    1999-01-01

    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.

  16. Long Return Periods for Earthquakes in San Gorgonio Pass and Implications for Large Ruptures of the San Andreas Fault in Southern California

    Science.gov (United States)

    Yule, J.; McBurnett, P.; Ramzan, S.

    2011-12-01

    The largest discontinuity in the surface trace of the San Andreas fault occurs in southern California at San Gorgonio Pass. Here, San Andreas motion moves through a 20 km-wide compressive stepover on the dextral-oblique-slip thrust system known as the San Gorgonio Pass fault zone. This thrust-dominated system is thought to rupture during very large San Andreas events that also involve strike-slip fault segments north and south of the Pass region. A wealth of paleoseismic data document that the San Andreas fault segments on either side of the Pass, in the San Bernardino/Mojave Desert and Coachella Valley regions, rupture on average every ~100 yrs and ~200 yrs, respectively. In contrast, we report here a notably longer return period for ruptures of the San Gorgonio Pass fault zone. For example, features exposed in trenches at the Cabezon site reveal that the most recent earthquake occurred 600-700 yrs ago (this and other ages reported here are constrained by C-14 calibrated ages from charcoal). The rupture at Cabezon broke a 10 m-wide zone of east-west striking thrusts and produced a >2 m-high scarp. Slip during this event is estimated to be >4.5 m. Evidence for a penultimate event was not uncovered but presumably lies beneath ~1000 yr-old strata at the base of the trenches. In Millard Canyon, 5 km to the west of Cabezon, the San Gorgonio Pass fault zone splits into two splays. The northern splay is expressed by 2.5 ± 0.7 m and 5.0 ± 0.7 m scarps in alluvial terraces constrained to be ~1300 and ~2500 yrs old, respectively. The scarp on the younger, low terrace postdates terrace abandonment ~1300 yrs ago and probably correlates with the 600-700 yr-old event at Cabezon, though we cannot rule out that a different event produced the northern Millard scarp. Trenches excavated in the low terrace reveal growth folding and secondary faulting and clear evidence for a penultimate event ~1350-1450 yrs ago, during alluvial deposition prior to the abandonment of the low terrace. Subtle evidence for a third event is poorly constrained by age data to have occurred between 1600 and 2500 yrs ago. The southern splay at Millard Canyon forms a 1.5 ± 0.1 m scarp in an alluvial terrace that is inset into the lowest terrace at the northern Millard site, and therefore must be < ~1300 yrs old. Slip on this fault probably occurred during the most recent rupture in the Pass. In summary, we think that the most recent earthquake occurred 600-700 yrs ago and generated ~6 m of slip on the San Gorgonio Pass fault zone. The evidence for two older earthquakes is less complete but suggests that they are similar in style and magnitude to the most recent event. The available data therefore suggest that the San Gorgonio Pass fault zone has produced three large (~6 m) events in the last ~2000 yrs, a return period of ~700 yrs assuming that the next rupture is imminent. We prefer a model whereby a majority of San Andreas fault ruptures end as they approach the Pass region from the north or the south (like the Wrightwood event of A.D. 1812 and possibly the Coachella Valley event of ~A.D. 1680). Relatively rare (once-per-millennia?), through-going San Andreas events break the San Gorgonio Pass fault zone and produce the region's largest earthquakes.

  17. PMMA/SAN and SAN/PBT nanoblends obtained by blending extrusion using thermodynamics and microrheogy basis

    OpenAIRE

    Costa, L. C.; E. Hage; A. Ternes Neto

    2014-01-01

    Styrene-Acrylonitrile (SAN) copolymer has been blended to poly(methyl methacrylate) (PMMA) and to poly(butylene terephthalate) (PBT) to obtain polymer nanoblends based on thermodynamics and microrheological aspects. PMMA/SAN and SAN/PBT blends show miscibility windows for a specific range of acrylonitrile (AN) content in the SAN copolymer. The phase diagram for both blends has been calculated using the interaction energy density parameter B as function of AN content in the SAN. A critical int...

  18. Relativity

    CERN Document Server

    Einstein, Albert

    2013-01-01

    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.

  19. Relativity

    CERN Document Server

    Brewster, Hilary D

    2009-01-01

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

  20. San Onofre unit 1 water hammer event

    International Nuclear Information System (INIS)

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

  1. SANS2-high-resolution small-angle diffractometer-reference instrument WBS 1.7.9

    International Nuclear Information System (INIS)

    SANS2 is a general-purpose small-angle neutron scattering spectrometer providing relatively high resolution and relatively low minimum Q values. Figure 1 provides a schematic representation of SANS2, and Table 1 gives the parameters for this instrument. Because of the broad Q range sampled in a single measurement, this instrument will be particularly useful in the study of time-dependent phenomena, such as deformation/orientation and phase transformations in complex fluids and polymers

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

    Scientific Electronic Library Online (English)

    Cristina, Libana Presa; M. Elena, Fernndez Martnez; Jos Carlos, Bermejo Higuera; M. Rosa, Carabias Maza; M. Aurora, Rodrguez Borrego; Marta, Villacieros Durbn.

    2012-06-01

    Full Text Available Las organizaciones estn comprometidas desde hace tiempo con la promocin de la salud y del bienestar de los trabajadores. Con este referente se realiz el presente estudio; el objetivo fue describir y analizar las asociaciones que existen entre las variables inteligencia emocional y engagement. La [...] poblacin fueron 150 trabajadores del Centro San Camilo. Los instrumentos de evaluacin 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 asociacin entre la inteligencia emocional y el engagement. As la inteligencia emocional, entendida como la capacidad para adquirir habilidades o competencias para la adaptacin 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 poblacin 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.

  3. 77 FR 66499 - Environmental Impact Statement: San Bernardino and Los Angeles Counties, CA

    Science.gov (United States)

    2012-11-05

    ... Hospitality Lane, San Bernardino, California 92408 (2) Sheraton Ontario Airport Hotel, 429 North Vineyard... the Hilton San Bernardino, 285 East Hospitality Lane, San Bernardino, California 92408 (2)...

  4. 78 FR 53245 - Safety Zone; San Diego Bayfair; Mission Bay, San Diego, CA

    Science.gov (United States)

    2013-08-29

    ... Department of Homeland Security FR Federal Register NPRM Notice of Proposed Rulemaking A. Regulatory History... Proposed Rulemaking (NPRM) on July 15, 2013 (78 FR 42027). The Coast Guard received no comments on the NPRM... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; San Diego Bayfair; Mission Bay, San...

  5. 78 FR 29025 - Sea World San Diego Fireworks 2013 Season; Mission Bay, San Diego, CA

    Science.gov (United States)

    2013-05-17

    ... FR Federal Register NPRM Notice of Proposed Rulemaking A. Regulatory History and Information The... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Sea World San Diego Fireworks 2013 Season; Mission Bay, San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard...

  6. 78 FR 38584 - Safety Zone; San Diego Symphony Summer POPS Fireworks 2013 Season, San Diego, CA

    Science.gov (United States)

    2013-06-27

    ... FR Federal Register NPRM Notice of Proposed Rulemaking A. Regulatory History and Information The... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; San Diego Symphony Summer POPS Fireworks 2013 Season, San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The...

  7. 76 FR 1386 - Safety Zone; Centennial of Naval Aviation Kickoff, San Diego Bay, San Diego, CA

    Science.gov (United States)

    2011-01-10

    ... Federal Register (73 FR 3316). Public Meeting We do not now plan to hold a public meeting. But you may... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Centennial of Naval Aviation Kickoff, San Diego Bay, San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Notice of proposed rulemaking. SUMMARY:...

  8. 77 FR 60899 - Safety Zone; Sea World San Diego Fireworks, Mission Bay; San Diego, CA

    Science.gov (United States)

    2012-10-05

    ... DHS Department of Homeland Security FR Federal Register NPRM Notice of Proposed Rulemaking A... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Sea World San Diego Fireworks, Mission Bay; San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard...

  9. 77 FR 42638 - Safety Zone: Sea World San Diego Fireworks, Mission Bay; San Diego, CA

    Science.gov (United States)

    2012-07-20

    .... SUPPLEMENTARY INFORMATION: Table of Acronyms DHS Department of Homeland Security FR Federal Register NPRM Notice... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone: Sea World San Diego Fireworks, Mission Bay; San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard...

  10. 78 FR 42027 - Safety Zone; San Diego Bayfair; Mission Bay, San Diego, CA

    Science.gov (United States)

    2013-07-15

    .... SUPPLEMENTARY INFORMATION: Table of Acronyms DHS Department of Homeland Security FR Federal Register NPRM Notice... Federal Register (73 FR 3316). 4. Public meeting We do not now plan to hold a public meeting. But you may... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; San Diego Bayfair; Mission Bay, San...

  11. 77 FR 42649 - Safety Zone: Sea World San Diego Fireworks, Mission Bay; San Diego, CA

    Science.gov (United States)

    2012-07-20

    ... FR Federal Register NPRM Notice of Proposed Rulemaking A. Regulatory History and Information The... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone: Sea World San Diego Fireworks, Mission Bay; San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard...

  12. 78 FR 39610 - Safety Zone; Big Bay Boom, San Diego Bay; San Diego, CA

    Science.gov (United States)

    2013-07-02

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Big Bay Boom, San Diego Bay; San Diego, CA... Fourth of July Big Bay Boom Fireworks display on the evening of July 4, 2013. These temporary safety... Security FR Federal Register NPRM Notice of Proposed Rulemaking A. Regulatory History and Information...

  13. 78 FR 29289 - Safety Zone; Big Bay Boom, San Diego Bay, San Diego, CA

    Science.gov (United States)

    2013-05-20

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Big Bay Boom, San Diego Bay, San Diego, CA... Big Bay Boom Fireworks display from 8:45 p.m. to 10 p.m. on July 4, 2013. These proposed safety zones... Department of Homeland Security FR Federal Register NPRM Notice of Proposed Rulemaking A....

  14. 76 FR 81371 - Safety Zone; San Francisco New Year's Eve Fireworks Display, San Francisco, CA

    Science.gov (United States)

    2011-12-28

    ...The Coast Guard will enforce the safety zone for the annual San Francisco New Year's Eve Fireworks Display in the Captain of the Port, San Francisco area of responsibility during the dates and times noted below. This action is necessary to protect life and property of the maritime public from the hazards associated with the fireworks display. During the enforcement period, unauthorized persons......

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

    Scientific Electronic Library Online (English)

    Katia Luisa, Rosario Rodrguez; Viera, Petrova Nicolaevna; Alberto, Cullar Valenzuela; Dailene, Acosta Freyre; Armando, Hernndez Valds; Hayde, Llanusa Ruiz.

    2013-12-01

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

  16. Una Visita al Viejo San Juan (A Visit to Old San Juan).

    Science.gov (United States)

    Cabello, Victor; And Others

    Written in Spanish, this black and white illustrated booklet provides a tour of Old San Juan, Puerto Rico's oldest and most historic city. Brief historical information is provided on the Perro de San Jeronimo, a statue of a barking dog found in front of the Castillo; Plaza de Colon, a small plaza dedicated to Christopher Columbus; the Catedral de…

  17. Representaciones, actitudes y prcticas respecto a la Leishmaniasis Cutnea en la poblacin del Cantn de Acosta, provincia de San Jos, Costa Rica: estudio antropolgico exploratrio Representation, attitudes, and practices related to Cutaneous Leishmaniasis in people from Acosta Country, San Jose province, Costa Rica: an exploratory anthropological astudy

    Directory of Open Access Journals (Sweden)

    Alvaro Dobles-Ulloa

    1994-06-01

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

  18. municipios Maracaibo y San Francisco

    Directory of Open Access Journals (Sweden)

    Rosa E. Ortiz

    2005-01-01

    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.

  19. The Association Between Exposure to Traffic-Related Air Pollution During Pregnancy and Children's Health Outcomes in the San Joaquin Valley of California: An Example of Causal Inference Methods

    OpenAIRE

    Padula, Amy Michelle

    2010-01-01

    Ambient air pollution and traffic exposure are widely recognized as an important public health concern. This research aims to investigate the association between traffic-related air pollution exposure during pregnancy and two important public health outcomes: pulmonary function in asthmatic children and term low birth weight. Asthma is the leading cause of childhood morbidity and term low birth weight is an important predictor of infant mortality. The period of pregnancy may be a critical tim...

  20. 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)

  1. Cacao use and the San Lorenzo Olmec.

    Science.gov (United States)

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

    2011-05-24

    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 Manat on the Gulf Coast. Until now, comparable evidence from San Lorenzo, the premier Olmec capital, was lacking. The present study of theobromine residues confirms the continuous presence and use of cacao products at San Lorenzo between 1800 and 1000 BCE, and documents assorted vessels forms used in its preparation and consumption. One elite context reveals cacao use as part of a mortuary ritual for sacrificial victims, an event that occurred during the height of San Lorenzo's power. PMID:21555564

  2. Cacao use and the San Lorenzo Olmec

    OpenAIRE

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

    2011-01-01

    Mesoamerican peoples had a long history of cacao usespanning more than 34 centuriesas 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 Manat on the Gulf Coast. Until now, comparable evidence from San Lorenzo, the premier Olmec capital, was lacking. The present study of theobromine residues confirms the continuous presence and use of cacao products at San Lorenzo between 1800 and 1000 BCE, an...

  3. Chlorinated hydrocarbon pesticides and polychlorinated biphenyls in sediment cores from San Francisco Bay

    Science.gov (United States)

    Venkatesan, M.I.; De Leon, R. P.; VanGeen, A.; Luoma, S.N.

    1999-01-01

    Sediment cores of known chronology from Richardson and San Pablo Bays in San Francisco Bay, CA, were analyzed for a suite of chlorinated hydrocarbon pesticides and polychlorinated biphenyls to reconstruct a historic record of inputs. Total DDTs (DDT = 2,4'- and 4,4'-dichlorodiphenyltrichloroethane and the metabolites, 2,4'- and 4,4'-DDE, -DDD) range in concentration from 4-21 ng/g and constitute a major fraction (> 84%) of the total pesticides in the top 70 cm of Richardson Bay sediment. A subsurface maximum corresponds to a peak deposition date of 1969-1974. The first measurable DDT levels are found in sediment deposited in the late 1930's. The higher DDT inventory in the San Pablo relative to the Richardson Bay core probably reflects the greater proximity of San Pablo Bay to agricultural activities in the watershed of the Sacramento and San Joaquin rivers. Total polychlorinated biphenyls (PCBs) occur at comparable levels in the two Bays (sediment deposited during the 1930's in Richardson Bay, about a decade earlier than the onset of detectable levels of DDTs. PCB inventories in San Pablo Bay are about a factor of four higher in the last four decades than in Richardson Bay, suggesting a distribution of inputs not as strongly weighed towards the upper reaches of the estuary as DDTs. The shallower subsurface maximum in PCBs compared to DDT in the San Pablo Bay core is consistent with the imposition of drastic source control measures four these constituents in 1970 and 1977 respectively. The observed decline in DDT and PCB levels towards the surface of both cores is consistent with a dramatic drop in the input of these pollutants once the effect of sediment resuspension and mixing is taken into account.

  4. An Examination of San Luis and Head Lakes

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior Reccomendations on development to be preformed on Head and San Luis lakes after the application of a deep well to drain Head Lake. San Luis Valley is losing...

  5. Coastal Cactus Wren, San Diego Co. - 2011 [ds708

    Data.gov (United States)

    California Department of Resources — The San Diego Multiple Species Conservation program (MSCP) was developed for the conservation of plants and animals in the southeast portion of San Diego County....

  6. Coastal Cactus Wren, San Diego Co. - 2009 [ds702

    Data.gov (United States)

    California Department of Resources — The San Diego Multiple Species Conservation program (MSCP) was developed for the conservation of plants and animals in the southeast portion of San Diego County....

  7. 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)

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

    1967-07-01

    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)

  8. Effects of the San Francisco Employer Health Spending Mandate

    OpenAIRE

    Colla, Carrie Hoverman

    2010-01-01

    San Francisco implemented a major health initiative in 2008, becoming the first city to put into practice a pay-or-play employer health spending mandate and creating Healthy San Francisco, a "public option" to promote affordable universal access to care. The health spending requirement is in addition to a requirement San Francisco instituted in 2006 for firms to provide paid sick leave to workers. This research combines public and new survey data sources to illustrate how employers in San F...

  9. Is Dilution The Solution To Pollution? Municipal Sewerage Systems In Late Nineteenth Century San Francisco And London

    OpenAIRE

    Smith, Brooke Ray

    2007-01-01

    This article explores the historical development of wastewater management planning in two cities: San Francisco and London. Both cities constructed their municipal sewerage networks in the late 1800s, and both cities designed these networks as combined systems, which carry storm water and sewer water in the same pipes. Due to differences in political and public attitudes towards sewage management and to the relative status of engineers versus scientists, London and San Francisco followed diff...

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

    OpenAIRE

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

    2009-01-01

    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 ...

  11. 77 FR 47358 - San Juan National Forest Resource Advisory Committee

    Science.gov (United States)

    2012-08-08

    ... Forest Service San Juan National Forest Resource Advisory Committee AGENCY: Forest Service, USDA. ACTION: Notice of meeting. SUMMARY: The San Juan National Forest Resource Advisory Council (RAC) will meet in...: The meeting will be held at the San Juan Public Lands Center, 15 Burnett Court, Durango, Colorado...

  12. 76 FR 40876 - San Juan National Forest Resource Advisory Committee

    Science.gov (United States)

    2011-07-12

    ... Forest Service San Juan National Forest Resource Advisory Committee AGENCY: Forest Service, USDA. ACTION: Notice of meeting. SUMMARY: The San Juan National Forest Resource Advisory Council (RAC) will meet in... meeting will be held at the San Juan Public Lands Center, 15 Burnett Court, Durango, Colorado in...

  13. 76 FR 10945 - San Luis Trust Bank, FSB, San Luis Obispo, CA; Notice of Appointment of Receiver

    Science.gov (United States)

    2011-02-28

    ... Receiver Notice is hereby given that, pursuant to the authority contained in section 5(d)(2) of the Home... Corporation as sole Receiver for San Luis Trust Bank, FSB, San Luis Obispo, California, (OTS No. 15051)...

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

    Directory of Open Access Journals (Sweden)

    Ernika G. Quimby

    2012-08-01

    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.

  15. San Antonio, Texas: Solar in Action (Brochure)

    Energy Technology Data Exchange (ETDEWEB)

    2011-10-01

    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.

  16. Zapotec Immigration: The San Lucas Quiavini Experience.

    Science.gov (United States)

    Lopez, Felipe H.; Munro, Pamela

    1999-01-01

    Interviews with 20 Zapotec immigrants from Oaxaca (Mexico) to Los Angeles examined their immigration experiences and adjustment to life in the United States. Discussion covers immigration from Oaxaca; living conditions, illiteracy, education, and language usage in the village of San Lucas Quiavini; immigration patterns; ethnicity and Oaxacan

  17. 77 FR 20379 - San Diego Gas &

    Science.gov (United States)

    2012-04-04

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission San Diego Gas & Electric Company v. Sellers of Energy and Ancillary Services Into Markets Operated by the California Independent System Operator Corporation and the...

  18. SANS observations on weakly flocculated dispersions

    DEFF Research Database (Denmark)

    Mischenko, N.; Ourieva, G.; Mortensen, K.; Reynaers, H.; Mewis, J.

    Structural changes occurring in colloidal dispersions of poly-(methyl metacrylate) (PMMA) particles, sterically stabilized with poly-(12-hydroxystearic acid) (PHSA), while varying the solvent quality, temperature and shear rate, are investigated by small-angle neutron scattering (SANS). For a...

  19. San Francisco's New Zoo's Connections for Conservation.

    Science.gov (United States)

    Routman, Emily

    2001-01-01

    Provides information on a redevelopment project at the San Francisco Zoo known as the New Zoo. The explicit goal of the project is to inspire a sense of caring and appreciation for wildlife that is the foundation of a conservation ethic. (DDR)

  20. 1986 San Salvador, El Salvador Images

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — At least 1,000 people killed, 10,000 injured, 200,000 homeless and severe damage in the San Salvador area. About 50 fatalities were the result of landslides in the...

  1. SANS analysis of aqueous ionic perfluoropolyether micelles

    CERN Document Server

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

    2002-01-01

    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.)

  2. San Jose, California: Solar in Action (Brochure)

    Energy Technology Data Exchange (ETDEWEB)

    2011-10-01

    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.

  3. Contours--Offshore of San Gregorio, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3306 presents data for the bathymetric contours for several seafloor maps (see sheets 1, 2, 3, 7, 10, SIM 3306) of the Offshore of San Gregorio map...

  4. Computer-based PRA at San Onofre

    International Nuclear Information System (INIS)

    Personal computer software, called Safety Monitor, used to perform probabilistic risk assessments (PRAs) is described. Safety Monitor assesses core damage and containment failure risks in less than 60 seconds. The software was developed by San Onofre PRA analysts and NUS Corporation. Operational use and cost savings are described

  5. Nathaniel Hawthorne Elementary School: San Antonio, Texas.

    Science.gov (United States)

    American Educator, 1997

    1997-01-01

    Discusses the successful use of Core Knowledge Curriculum in one inner-city elementary school in San Antonio (Texas) that had previously reflected low student achievement, inconsistent attendance, and student behavioral problems. Improvements in these conditions as revealed through teacher observations are highlighted. (GR)

  6. Environmental geologic analysis of Rio de las Taguas basin Departmento Iglesia San Juan Argentina

    International Nuclear Information System (INIS)

    A mineral environmental research project results where it has been located in Rio de las Taguas basin, Departamento Iglesia, Provincia de San Juan, Argentina. It has been placed in frontal Andean mountain in San Juan. In this geographic framework has been developed Au and Ag mineral project in order the world scale. The aim of this article is has been related the mineral and geological units bet wen the basin chemistry as well as to carry out future measurements mines impacts in this area. (author)

  7. Isotopic Evidence of Nitrate Sources and its Relationship to Algae in the San Joaquin River, California

    Science.gov (United States)

    Silva, S. R.; Kendall, C.; Young, M. B.; Stringfellow, W. T.; Borglin, S. E.; Kratzer, C. R.; Dahlgren, R. A.; Schmidt, C.; Rollog, M. E.

    2007-12-01

    Many competing demands have been placed on the San Joaquin River including deep water shipping, use as agricultural and drinking water, transport of agricultural and urban runoff, and recreation. These long-established demands limit the management options and increase the importance of understanding the river dynamics. The relationships among sources of water, nitrate, and algae in the San Joaquin River must be understood before management decisions can be made to optimize aquatic health. Isotopic analyses of water samples collected along the San Joaquin River in 2005-2007 have proven useful in assessing these relationships: sources of nitrate, the productivity of the San Joaquin River, and the relationship between nitrate and algae in the river. The San Joaquin River receives water locally from wetlands and agricultural return flow, and from three relatively large tributaries whose headwaters are in the Sierra Nevada. The lowest nitrate concentrations occur during periods of high flow when the proportion of water from the Sierra Nevada is relatively large, reflecting the effect of dilution from the big tributaries and indicating that a large fraction of the nitrate is of local origin. Nitrogen isotopes of nitrate in the San Joaquin River are relatively high (averaging about 12 per mil), suggesting a significant source from animal waste or sewage and/or the effects of denitrification. The d15N of nitrate varies inversely with concentration, indicating that these high isotopic values are also a local product. The d15N values of nitrate from most of the local tributaries is lower than that in the San Joaquin suggesting that nitrate from these tributaries does not account for a significant fraction of nitrate in the river. The source of the non-tributary nitrate must be either small unmeasured surface inputs or groundwater. To investigate whether groundwater might be a significant source of nitrate to the San Joaquin River, groundwater samples are being collected monthly from over 20 bank and in-stream wells. Preliminary data suggest that much of the groundwater nitrate has been variably denitrified thereby increasing its d15N values, but not by enough to account for the high d15N values in the river nitrate. The d15N of algae in the San Joaquin reflects the high values of the nitrate in the river indicating (1) that the San Joaquin is productive despite its relatively high opacity, (2) that the algae use the nitrate as a primary nutrient source, and (3) that the concentrations of algae in the San Joaquin are not principally dependent on algae from the tributaries being flushed into the river as has been suggested. The sources of nitrate to the San Joaquin River must be identified if algae production is to be controlled and hypoxic conditions in the downstream reaches eliminated.

  8. 77 FR 48532 - Notice of Intent To Repatriate Cultural Items: San Diego State University, San Diego, CA

    Science.gov (United States)

    2012-08-14

    ... National Park Service Notice of Intent To Repatriate Cultural Items: San Diego State University, San Diego, CA AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The San Diego State University... Indian tribe that believes itself to be culturally affiliated with the cultural items may contact...

  9. 75 FR 8804 - Safety Zone; NASSCO Launching of USNS Charles Drew, San Diego Bay, San Diego, CA.

    Science.gov (United States)

    2010-02-26

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; NASSCO Launching of USNS Charles Drew, San Diego Bay, San Diego, CA. AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard is establishing a temporary safety zone on the navigable waters of the San Diego Bay in support...

  10. 75 FR 8106 - Don Edwards San Francisco Bay National Wildlife Refuge, Alameda, Santa Clara, and San Mateo...

    Science.gov (United States)

    2010-02-23

    ... Fish and Wildlife Service Don Edwards San Francisco Bay National Wildlife Refuge, Alameda, Santa Clara, and San Mateo Counties, CA AGENCY: Fish and Wildlife Service, Interior. ACTION: Notice of intent to...) and Environmental Assessment (EA) for the Don Edwards San Francisco Bay National Wildlife...

  11. 77 FR 15799 - Notice of Intent To Repatriate a Cultural Item: San Francisco State University, San Francisco, CA

    Science.gov (United States)

    2012-03-16

    ... cultural item in the possession of the San Francisco State University (SFSU) that meet the definition of... National Park Service Notice of Intent To Repatriate a Cultural Item: San Francisco State University, San... University, in consultation with the appropriate Indian tribes, has ] determined that the cultural item...

  12. 33 CFR 3.55-20 - Sector San Francisco: San Francisco Bay Marine Inspection Zone and Captain of the Port Zone.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Sector San Francisco: San..., MARINE INSPECTION ZONES, AND CAPTAIN OF THE PORT ZONES Eleventh Coast Guard District 3.55-20 Sector San Francisco: San Francisco Bay Marine Inspection Zone and Captain of the Port Zone. The Sector San...

  13. Tsunami Hazards in San Diego Bay, California

    Science.gov (United States)

    Barberopoulou, A.; Legg, M.; Uslu, B.; Synolakis, C. E.

    2008-12-01

    We assess tsunami hazards in San Diego Bay, California, using recently available high resolution bathymetric/topographic data and newly identified offshore tsunami sources. Using MOST (Titov and Synolakis, 1998), we simulate locally, regionally, and distant-generated tsunamis. Local tsunami source models use more realistic fault and landslide data than previous efforts. Modeling results suggest that local sources are responsible for the largest waves within the San Diego Bay and Mission Bay. Because San Diego Bay is naturally protected by North Island and the Silver Strand, the wave heights predicted are consistently smaller inside the harbor than outside. However, historical accounts and our predicted currents do imply that San Diego Bay may be vulnerable to strong tsunami induced currents. More specifically, large currents are expected inside the harbor for various distant and local tsunami sources with predicted flow velocities exceeding 100cm/sec (Borrero, et al, 1996). Such currents have been damaging to harbor facilities, such as wharves and piers, and may cause boats to break from moorings and ram into adjacent harbor structures as observed in recent historic tsunamis. We note that the first generation of inundation maps in use in San Diego County by emergency management is based on much larger "worst case but realistic scenarios" (Synolakis et al, 2002), which reflected the understanding of offshore hazards pervasive ten years ago. Large inundation and flow depths were not observed in any of our simulations with a possible exception in Mission Bay. -Borrero, J.C., M. Ortiz, V. Titov, and C.E. Synolakis. Field Survey of the Mexican Tsunami, EOS, Transactions, AGU 78, 85 and 87-88. (EOS cover article.) -Synolakis, C.E., Borrero, J.C., Eisner, R.,2002, Developing inundation maps for the State of California, Solutions to Coastal Disasters, modeling of tidal wave runup, JWPCOE, ASCE, 124, (4), pp 157-171.

  14. The 1793 eruption of San Martn Tuxtla volcano, Veracruz, Mexico

    Science.gov (United States)

    Espndola, J. M.; Zamora-Camacho, A.; Godinez, M. L.; Schaaf, P.; Rodrguez, S. R.

    2010-11-01

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

  15. 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)

  16. 75 FR 28509 - Revisions to the California State Implementation Plan, San Joaquin Valley Unified Air Pollution...

    Science.gov (United States)

    2010-05-21

    ... Air Pollution Control District AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: EPA is proposing to approve revisions to the San Joaquin Valley Unified Air Pollution Control...), 57 FR 55620, November 25, 1992. 2. ``Issues Relating to VOC Regulation Cutpoints, Deficiencies,...

  17. CAREER TRAINING IN HOTEL AND RESTAURANT OPERATION...AT CITY COLLEGE OF SAN FRANCISCO.

    Science.gov (United States)

    BATMALE, LOUIS F.; MULLANY, GEORGE G.

    THE HOTEL AND RESTAURANT PROGRAM, ONE OF 35 SEMIPROFESSIONAL TRAINING PROGRAMS AT CITY COLLEGE OF SAN FRANCISCO, COMBINES GENERAL EDUCATION, RELATED BUSINESS INSTRUCTION, HOTEL AND RESTAURANT CLASSES, FOOD PREPARATION AND SERVICE TRAINING, AND WORK EXPERIENCE. THIS DESCRIPTION OF THE PROGRAM INCLUDES (1) PURPOSES AND OBJECTIVES, (2) CURRICULUM,…

  18. Olmec civilization, veracruz, Mexico: dating of the san lorenzo phase.

    Science.gov (United States)

    Coe, M D; Diehl, R A; Stuiver, M

    1967-03-17

    Archeological excavations at San Lorenzo Tenochtitlan, Veracruz, show that the Olmec sculptures of this zone are associated with the San Lorenzo phase, which can be placed in the Early Formative period (1500-800 B.C.) on the basis of ceramic comparisons. Five of six radiocarbon dates for the San Lorenzo phase fall within the 1200-900 B.C. span. The San Lorenzo phase therefore marks the beginning of Olmec civilization, and the sites forming the San Lorenzo Tenochtitlan group represent the oldest civilized communities known in Mexico or Central America. PMID:17839608

  19. SAN virtualization study and implementation based on FC switches

    Science.gov (United States)

    Yang, Yi; Cao, Mingcui; Luo, Zhixiang

    2005-11-01

    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.

  20. SANS facility at the Pitesti 14 MW Triga reactor

    Energy Technology Data Exchange (ETDEWEB)

    Ionita, I.; Anghel, E.; Mincu, M.; Datcu, A. [Institute for Nuclear Research - Pitesti (Romania); Grabcev, B.; Todireanu, S. [National Institute of Materials Physics (NIMP) Bucharest (Romania); Constantin, F. [National Institute of Physics and Nuclear Engineering Bucharest (Romania); Shvetsov, V. [Joint Institute for Nuclear Research Dubna (Russian Federation); Popescu, G. [National College Al. Odobescu Pitesti (Romania)

    2006-07-01

    Full text of publication follows: At the present time, an important not yet fully exploited potentiality is represented by the SANS instruments existent at lower power reactors and reactors in developing countries even if they are, generally, endowed with a simpler equipment and are characterized by the lack of infrastructure to maintain and repair high technology accessories. The application of SANS at lower power reactors and in developing countries nevertheless is possible in well selected topics where only a restricted Q range is required, when scattering power is expected to be sufficiently high or when the sample size can be increased at the expense of resolution. Examples of this type of applications are: 1) Phase separation and precipitates in material science, 2) Ultrafine grained materials (nano-crystals, ceramics), 3) Porous materials such as concretes and filter materials, 4) Conformation and entanglements of polymer-chains, 5) Aggregates of micelles in microemulsions, gels and colloids, 6) Radiation damage in steels and alloys. The need for the installation of a new SANS facility at the Triga Reactor of the Institute of Nuclear Researches in Pitesti, Romania become actual especially after the shutting down of the VVRS Reactor from Bucharest. A monochromatic neutron beam with 1.5 Angstrom {<=} {lambda} {<=} 5 Angstrom is produced by a mechanical velocity selector with helical slots.The distance between sample and detectors plane is (5.2 m ). The sample width may be fixed between 10 mm and 20 mm. The minimum value of the scattering vector is Q{sub min} = 0.005 Angstrom{sup -1} while the maximal value is Q{sub max} = 0.5 Angstrom{sup -1}. The relative error is {delta}Q/Q{sub min} = 0.5. The cooperation partnership between advanced research centers and the smaller ones from developing countries could be fruitful. The formers act as mentors in solving specific problems. Such a partnership was established between INR Pitesti, Romania and JINR Dubna, Russia. The first step in this cooperation consists in the manufacturing at Dubna of a battery of gas filled positional detectors devoted to the SANS instrument from Pitesti. (authors)

  1. SANS facility at the Pitesti 14 MW Triga reactor

    International Nuclear Information System (INIS)

    Full text of publication follows: At the present time, an important not yet fully exploited potentiality is represented by the SANS instruments existent at lower power reactors and reactors in developing countries even if they are, generally, endowed with a simpler equipment and are characterized by the lack of infrastructure to maintain and repair high technology accessories. The application of SANS at lower power reactors and in developing countries nevertheless is possible in well selected topics where only a restricted Q range is required, when scattering power is expected to be sufficiently high or when the sample size can be increased at the expense of resolution. Examples of this type of applications are: 1) Phase separation and precipitates in material science, 2) Ultrafine grained materials (nano-crystals, ceramics), 3) Porous materials such as concretes and filter materials, 4) Conformation and entanglements of polymer-chains, 5) Aggregates of micelles in microemulsions, gels and colloids, 6) Radiation damage in steels and alloys. The need for the installation of a new SANS facility at the Triga Reactor of the Institute of Nuclear Researches in Pitesti, Romania become actual especially after the shutting down of the VVRS Reactor from Bucharest. A monochromatic neutron beam with 1.5 Angstrom ≤ λ ≤ 5 Angstrom is produced by a mechanical velocity selector with helical slots.The distance between sample and detectors plane is (5.2 m ). The sample width may be fixed between 10 mm and 20 mm. The minimum value of the scattering vector is Qmin = 0.005 Angstrom-1 while the maximal value is Qmax = 0.5 Angstrom-1. The relative error is ΔQ/Qmin = 0.5. The cooperation partnership between advanced research centers and the smaller ones from developing countries could be fruitful. The formers act as mentors in solving specific problems. Such a partnership was established between INR Pitesti, Romania and JINR Dubna, Russia. The first step in this cooperation consists in the manufacturing at Dubna of a battery of gas filled positional detectors devoted to the SANS instrument from Pitesti. (authors)

  2. SANS Facility at the Pitesti 14 MW TRIGA Reactor

    International Nuclear Information System (INIS)

    At the present time, an important not yet fully exploited potentiality is represented by the SANS instruments existent at lower power reactors and reactors in developing countries even if they are, generally, endowed with a simpler equipment and are characterized by the lack of infrastructure to maintain and repair high technology accessories. The application of SANS at lower power reactors and in developing countries nevertheless is possible in well selected topics where only a restricted Q range is required, when scattering power is expected to be sufficiently high or when the sample size can be increased at the expense of resolution. Examples of this type of applications are: 1) Phase separation and precipitates in material science, 2) Ultrafine grained materials (nanocrystals, ceramics), 3) Porous materials such as concretes and filter materials, 4) Conformation and entanglements of polymer-chains, 5) Aggregates of micelles in microemulsions, gels and colloids, 6) Radiation damage in steels and alloys. The need for the installation of a new SANS facility at the TRIGA Reactor of the Institute of Nuclear Research in Pitesti, Romania becomes actual especially after the shutting down of the WWR-S Reactor from Bucharest. A monochromatic neutron beam with 1.5 A ≤ λ ≤ 5 A is produced by a mechanical velocity selector with helical slots. The distance between sample and detectors plane is 5.2 m. The sample width may be fixed between 10 mm and 20 mm. The minimum value of the scattering vector is Qmin = 0.005 A-1 while the maximal value is Qmax = 0.5 A-1. The relative error is ΔQ/Qmin = 0.5. The cooperation partnership between advanced research centers and the smaller ones from developing countries could be fruitful. The formers act as mentors in solving specific problems. Such a partnership was established between INR Pitesti, Romania and JINR Dubna, Russia. The first step in this cooperation consists in the manufacturing at Dubna of a battery of gas filled positional detectors devoted to the SANS instrument from Pitesti. (authors))

  3. SAFOD Penetrates the San Andreas Fault

    Directory of Open Access Journals (Sweden)

    Mark D. Zoback

    2006-03-01

    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.

  4. 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)

  5. San Cristobal Galapagos wind power project

    Energy Technology Data Exchange (ETDEWEB)

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

    2009-07-01

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

  6. SANS-1 Experimental reports of 2000

    International Nuclear Information System (INIS)

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

  7. Dcharges luminescentes impulsionnelles et sans mercure

    Science.gov (United States)

    Robert, E.; Cachoncinlle, C.; Viladrosa, R.; Dozias, S.; Point, S.; Pouvesle, J.-M.

    2005-06-01

    Ce papier prsente les tudes ralises au GREMI en collaboration avec la socit AUPEM SEFLI pour le dveloppement d'enseignes lumineuses sans mercure. Les travaux concernent la caractrisation lectrique, spectroscopique et photomtrique de dcharges luminescentes base de gaz rares (notamment non et xnon) produites par un gnrateur compact d'impulsions lectriques. Au-del, de l'augmentation trs significative du flux lumineux et de l'efficacit nergtique en comparaison avec les performances obtenues par l'emploi de ballasts conventionnels, la spectroscopie rsolue en temps des plasmas de colonne positive et des rgions proches des lectrodes permet d'apprhender les conditions de fonctionnement des enseignes sans mercure et la cintique ractionnelle pendant et aprs (rgime de post dcharge) l'application des impulsions lectriques.

  8. 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)

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

    1992-11-01

    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.).

  9. San Bernardino National Wildlife Refuge Well 10

    Energy Technology Data Exchange (ETDEWEB)

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

    1999-12-01

    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.

  10. The San Andreas Fault System, California, USA

    Science.gov (United States)

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

    1992-01-01

    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

  11. The San Joaquin Valley Westside Perspective

    Energy Technology Data Exchange (ETDEWEB)

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

    2006-03-27

    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.

  12. A fatal irradiator accident in San Salvador

    International Nuclear Information System (INIS)

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

  13. Anisotropy of SANS in metallic glasses

    International Nuclear Information System (INIS)

    SANS in metallic glasses is anisotropic and depends on the ribbon's orientation. Pd-based melt spun and Ni-based electrochemically deposited glasses exhibit different anisotropies. Both glasses contain scattering centers of the order of 40nm wide in the ribbon plane. In the melt-spun alloy, the scatterers are very thin along the thickness perpendicular to the substrate. In the deposited alloy however, the defects are long along the thickness perpendicular to the electrode

  14. Bismuth ochers from San Diego Co., California

    Science.gov (United States)

    Schaller, W.T.

    1911-01-01

    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.

  15. Semi Symmetric Method Of SAN Storage Virtualization

    OpenAIRE

    Jagli, Dhanamma; Solanki, Ramesh; Temkar, Mrs. Rohini; Veshapogu, Laxmi

    2013-01-01

    Virtualization is one of the biggest buzzwords of the technology industry right at this moment. The fast growth in storage capacity and processing power in enterprise installations coupled with the need for high availability, requires Storage Area Network (SAN) architecture to provide seamless addition of storage and performance elements without downtime. The usual goal of virtualization is to centralize administrative tasks while improving scalability and work loads. This paper, describing a...

  16. Probing into perio in San Francisco.

    Science.gov (United States)

    Keynejad, V

    1994-01-01

    In March 1993 I left the chill of Manchester looking forward to my undergraduate elective visit to the warmer University of California, San Francisco (UCSF) School of Dentistry. I was fortunate enough to be able to attend a pre-arranged teaching programme for a period of 3 weeks, which included periodontology as the main subject but also covered the treatment of temporomandibular joint dysfunction syndrome and implantology. PMID:8312071

  17. Pharyngoamygdalitis treatment in San Luis City, Argentina

    OpenAIRE

    De Pauw, María C.; Panini, Alicia, del; Rapisarda, Ana M. P.; Valsecia, Mabel E.; Calderón, Claudia P.

    2012-01-01

    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. Antihista...

  18. 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)

    2013-03-29

    ... Acronyms DHS Department of Homeland Security FR Federal Register NPRM Notice of Proposed Rulemaking A... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Spanish Navy School Ship San Sebastian El... during the transit of the Spanish Navy School Ship San Sebastian El Cano, a public vessel, and...

  19. Complexation studies of actinides (U, Pu, Am) with linear polyamino-carboxylate ligands and sidero-chelates; Etudes de la chelation d'actinides (U, Pu, Am) par des ligands polyaminocarboxylate lineaires et des siderochelates d'interet environnemental

    Energy Technology Data Exchange (ETDEWEB)

    Nguyen, L.V.

    2010-11-25

    As part of our research endeavour aimed at developing and improving decontamination processes of wastewater containing alpha emitters, physico-chemical complexation studies of actinides (U, Pu, Am) with organic open-chain ligands such as poly-aminocarboxylic acids (H{sub 4}EDTA) and sidero-chelates (di-hydroxamic acids and desferrioxamine B) have been carried out. Gaining a clear understanding of the coordination properties of the targeted actinides is an essential step towards the selection of the most appropriate chelating agents that will exhibit high uptake efficiencies. EXAFS (Extended X-ray Absorption Fine Structure) measurements at the ESRF synchrotron enabled to elucidate the coordination scheme of uranium and plutonium complexes. Solution thermodynamic investigations were intended to provide valuable information about the nature and the stability of the uranium(VI) and americium(III) complexes prevailing at a given pH in solution. The set of stability constants determined from potentiometric and UV-visible spectrophotometric titrations, allowed to predict the speciation of the selected actinides in presence of the aforementioned ligands and to determine the pH range required for achieving 'ultimate' decontamination. (author) [French] Dans le cadre du developpement et de l'amelioration des procedes de decontamination d'effluents aqueux contamines par des radioelements emetteurs alpha, des etudes physico-chimiques sur la complexation des actinides (U, Pu, Am) avec des ligands organiques tels que des acides polyaminocarboxyliques lineaires (H{sub 4}EDTA) et des siderochelates (acides dihydroxamiques et desferrioxamine B) ont ete effectuees. La comprehension des proprietes de coordination est une etape essentielle pour selectionner les meilleurs agents chelatants qui se montreront efficaces dans le traitement des effluents. Les schemas de coordination des complexes d'uranium et de plutonium avec ces ligands ont ete determines a l'aide de mesures par spectroscopie EXAFS (Extended X-ray Absorption Fine Structure) effectuees au synchrotron de l'ESRF. Ces travaux ont ete completes par des etudes thermodynamiques realisees en couplant des mesures potentiometriques et spectrophotometriques UV-Visible afin d'identifier la nature des complexes d'uranium(VI) et d'americium(III) formes en solution et d'evaluer leur stabilite. A l'aide des constantes d'equilibre, il est possible de simuler le diagramme de speciation dans les conditions de traitement des effluents du centre de Valduc et de definir ainsi une gamme de pH dans laquelle le ligand est efficace pour atteindre une decontamination 'ultime'

  20. Development of 40m SANS and Its Utilization Techniques

    International Nuclear Information System (INIS)

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

  1. Sans study of asphaltene aggregation

    International Nuclear Information System (INIS)

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

  2. Ruptures of the San Andreas fault system in San Gorgonio Pass

    Science.gov (United States)

    Yule, D.; Sieh, K. E.

    2010-12-01

    Fault behavior models for the San Andreas fault system in San Gorgonio Pass hinge upon contrasting interpretations of the structural complexity and diffuse seismicity in the Pass region. One model maintains that the fault system can rupture through the Pass in ~ M 7.8 earthquakes that extend from the Salton Sea to the Mojave Desert. Another model argues that the structural complexity here arrests San Andreas ruptures as they approach from either side of the Pass and limits their size to ~ M 7.5. One way to test these models is to examine the paleoseismic record of active faults in the Pass. Work at the Burro Flats site, located where the San Bernardino strand feeds into San Gorgonio Pass from the north, reveals evidence for at least nine earthquakes in the last 2000 yrs. The average earthquake recurrence is about 200 yrs with the maximum and minimum intervals between earthquakes equal to about 550 and 80 yrs, respectively. The average recurrence is considered to be a maximum value because a hiatus in sedimentation during the Early Middle Ages may ‘hide’ one or more event during this time period. The maximum recurrence interval of 550 yrs is likely an overestimate owing to the large errors in the timing of one event ~1300 yrs ago. In general, the Burro Flats event record and average recurrence is very similar to those at sites in the San Bernardino and Coachella Valley regions. The most recent rupture at Burro Flats cuts strata that contain European-introduced pollen and is interpreted to record the southeastern extent of the 1812 Wrightwood earthquake, a possible example of a ‘Pass-as-a-barrier’, moderate-sized event. The timing of pre-1812 events at Burro Flats correlate with the timing of San Andreas events in the San Bernardino and Coachella Valley regions, possible examples of through going, larger-sized earthquakes. Work at the Cabezon site, located on a thrust segment of the San Gorgonio Pass fault zone, shows evidence for two ruptures since ~ AD 1300. Age data permit correlating the two events at Cabezon with the second and third events at Burro Flats, assuming that the 1812 earthquake died out between the Burro Flats and Cabezon sites. Another test of the likelihood of a through going rupture is the analysis of fault steps in the Pass region. Mapping of the active faults here shows that fault steps are smaller than the 3-4 km limit that has halted historic ruptures worldwide, and within the size range where ruptures cease only ~40 per cent of the time. Though the 1812 earthquake appears to have stopped within the Pass, active fault maps in combination with paleoseismic data cannot preclude that very large, through going San Andreas earthquakes happen in San Gorgonio Pass.

  3. San Diego Littoral Cell CRSMP Receiver Sites 2009

    Data.gov (United States)

    California Department of Resources A total of 27 possible placement sites (some with multiple placement footprints) are incorporated into this San Diego Coastal Regional Sediment Management Plan to...

  4. San Francisco Littoral Cell CRSMP Sensitive Habitat 2012

    Data.gov (United States)

    California Department of Resources Ecological regions of interest as identified in the San Francisco Coastal Region Sediment Management Plan.NPS identifies several special management areas within the...

  5. Characterization of Tight Gas Reservoir Pore Structure Using USANS/SANS and Gas Adsorption Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Clarkson, Christopher R [ORNL; He, Lilin [ORNL; Agamalian, Michael [ORNL; Melnichenko, Yuri B [ORNL; Mastalerz, Maria [Indiana Geological Survey; Bustin, Mark [University of British Columbia, Vancouver; Radlinski, Andrzej Pawell [ORNL; Blach, Tomasz P [ORNL

    2012-01-01

    Small-angle and ultra-small-angle neutron scattering (SANS and USANS) measurements were performed on samples from the Triassic Montney tight gas reservoir in Western Canada in order to determine the applicability of these techniques for characterizing the full pore size spectrum and to gain insight into the nature of the pore structure and its control on permeability. The subject tight gas reservoir consists of a finely laminated siltstone sequence; extensive cementation and moderate clay content are the primary causes of low permeability. SANS/USANS experiments run at ambient pressure and temperature conditions on lithologically-diverse sub-samples of three core plugs demonstrated that a broad pore size distribution could be interpreted from the data. Two interpretation methods were used to evaluate total porosity, pore size distribution and surface area and the results were compared to independent estimates derived from helium porosimetry (connected porosity) and low-pressure N{sub 2} and CO{sub 2} adsorption (accessible surface area and pore size distribution). The pore structure of the three samples as interpreted from SANS/USANS is fairly uniform, with small differences in the small-pore range (< 2000 {angstrom}), possibly related to differences in degree of cementation, and mineralogy, in particular clay content. Total porosity interpreted from USANS/SANS is similar to (but systematically higher than) helium porosities measured on the whole core plug. Both methods were used to estimate the percentage of open porosity expressed here as a ratio of connected porosity, as established from helium adsorption, to the total porosity, as estimated from SANS/USANS techniques. Open porosity appears to control permeability (determined using pressure and pulse-decay techniques), with the highest permeability sample also having the highest percentage of open porosity. Surface area, as calculated from low-pressure N{sub 2} and CO{sub 2} adsorption, is significantly less than surface area estimates from SANS/USANS, which is due in part to limited accessibility of the gases to all pores. The similarity between N{sub 2} and CO{sub 2}-accessible surface area suggests an absence of microporosity in these samples, which is in agreement with SANS analysis. A core gamma ray profile run on the same core from which the core plug samples were taken correlates to profile permeability measurements run on the slabbed core. This correlation is related to clay content, which possibly controls the percentage of open porosity. Continued study of these effects will prove useful in log-core calibration efforts for tight gas.

  6. Otomi de San Andres Cuexcontitlan, Estado de Mexico (Otomi of San Andres Cuexcontitlan, State of Mexico).

    Science.gov (United States)

    Lastra, Yolanda

    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 Otomi, an indigenous language of Mexico spoken in San Andres Cuexcontitlan, in the state of Mexico. The objective of collecting such a representative…

  7. Existing Whole-House Solutions Case Study: Build San Antonio Green, San Antonio, Texas

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2013-06-01

    PNNL, FSEC, and CalcsPlus provided technical assistance to Build San Antonio Green on three deep energy retrofits. For this gut rehab they replaced the old roof with a steeper roof and replaced drywall while adding insulation, new HVAC, sealed ducts, transfer grilles, outside air run-time ventilation, new lighting and water heater.

  8. 77 FR 59969 - Notice of Inventory Completion: San Francisco State University, Department of Anthropology, San...

    Science.gov (United States)

    2012-10-01

    ... San Francisco State University Department of Anthropology records. In the Federal Register (73 FR... published in a Notice of Inventory Completion in the Federal Register (73 FR 30156-30158, May 23, 2008). In the Federal Register (73 FR 30156-30158, May 23, 2008), paragraph four is corrected by...

  9. SANS-II at SINQ: Installation of the former Risø-SANS facility

    DEFF Research Database (Denmark)

    Strunz, P.; Mortensen, K.; Janssen, S.

    SANS-II facility at SINQ (Paul Scherrer Institute)-the reinstalled former Riso small-angle neutron scattering instrument-is presented. Its operational characteristics are listed. Approaches for precise determination of wavelength, detector dead time and attenuation factors are described as well. (C...

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

    Science.gov (United States)

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

    2006-01-01

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

  11. 77 FR 70891 - Safety Zone; Bay Bridge Construction, San Francisco Bay, San Francisco, CA

    Science.gov (United States)

    2012-11-28

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Bay Bridge Construction, San Francisco Bay..., CA in support of the Bay Bridge Construction Safety Zone from November 1, 2012 through July 31, 2013...: Table of Acronyms DHS Department of Homeland Security FR Federal Register NPRM Notice of...

  12. 75 FR 15611 - Safety Zone; United Portuguese SES Centennial Festa, San Diego Bay, San Diego, CA

    Science.gov (United States)

    2010-03-30

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; United Portuguese SES Centennial Festa, San... United Portuguese SES Centennial Festa. This temporary safety zone is necessary to provide for the safety... Spectaculars is sponsoring the United Portuguese SES Centennial Festa, which will include a...

  13. 77 FR 54815 - Safety Zone: America's Cup World Series Regattas, San Francisco Bay; San Francisco, CA

    Science.gov (United States)

    2012-09-06

    ... INFORMATION: Table of Acronyms ACRM America's Cup Race Management DHS Department of Homeland Security FR... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone: America's Cup World Series Regattas, San... Alcatraz Island. This rule will regulate the on-water activities associated with 2012 America's Cup...

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

    Science.gov (United States)

    Mexico Coll. (Mexico City)

    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

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

    Science.gov (United States)

    Mexico Coll. (Mexico City)

    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

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

    Science.gov (United States)

    Mexico Coll. (Mexico City)

    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

  17. San Francisco: 50 years on - part two

    OpenAIRE

    Buckley, Roger; Ferretti, Valdo; Meaney, Neville; Trotter, Ann

    2001-01-01

    Buckley describes how Britain took the independent step of recognizing the People's Republic of China, a step which led to problems about China being invited to the San Francisco conference. After China's entry into the war in Korea, Hong Kong's trade was squeezed through trade embargos imposed by the United States and its exposed security system was vulnerable, had it not been for the presence of the US 7th fleet in the Taiwan Straits. Ferretti shows that the leading ideas of Yoshida Shigeru...

  18. San andres isla: un lugar inolvidable

    OpenAIRE

    Chicangana Solano, María Estella

    2013-01-01

    Gracias al Ministerio de Educación Nacional de Colombia y la Secretaría de Educación Departmento de Cauca quienes me dieron esta excelente oportunidad de aprender en un nivel personal y profesional como profesor de Inglés. Mi familia fue un muy importante en el apoyo en mi viaje a la isla de San Andrés. Estoy muy agradecido a todos ellos. Aca cuento la experiencia que me permitió compartir un periodo de mi vida con algunos de los más maravillosa clase de gente que he conocido antes. La isla d...

  19. Image and memory in san victorino

    OpenAIRE

    Sabogal Bernal, Sandra Jinneth

    2010-01-01

    From the analysis of the physical and functional transformations of San victorino’s sector in Bogotá’s centre, the author studies the dynamics which have taken part in the construction and configuration of the place, which has been chosen by the roll that has exerted in the development of the city. The objective of the article is to determine how urbanism, perhaps as science, takes part, re qualifies or powers spaces that have undergone deterioration processes, although they are susceptible ...

  20. Amplification sans bruit d'images optiques

    Science.gov (United States)

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

    2004-11-01

    Nous utilisons un Oscillateur Paramtrique Optique (OPO) pomp sous le seuil dans le but d'amplifier une image multimode transverse sans dgradation du rapport signal bruit. Le dispositif exprimental met en uvre un OPO de type II triplement rsonant et semi-confocal pour le faisceau amplifi. L'existence d'effets quantiques lors de l'amplification multimode dans un tel dispositif a t montre exprimentalement. Plus gnralement, ceci nous a amen tudier les proprits quantiques transverses des faisceaux lumineux amplifis. Une telle tude peut trouver des applications non seulement en imagerie, mais galement dans le traitement quantique de l'information.

  1. The San Onofre neutrino oscillation experiment

    Science.gov (United States)

    Chen, M.; Cook, B.; Henrikson, H.; Hertenberger, R.; Mascarenhas, N.; Novikov, V.; Boehm, F.; Vogel, P.

    1994-05-01

    A detector for the study of neutrino oscillations with a projected sensitivity for ?m2 of 10 -3eV 2 and a mixing angle sensitivity of si 2 2 ? = 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 0.65 km from the San Onofre reactors, at a depth of 25 mwe below surface, surrounded by neutron buffer and an active muon veto. The projected event rate will be 17 d -1. Detailed studies of the detector are presented.

  2. 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.))

  3. 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)

  4. San Francisco Bay National Wildlife Refuge Complex Annual Narrative Report 1981

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The San Francisco Bay National Wildlife Refuge Complex comprises of three refuges including the San Francisco Bay National Wildlife Refuge, the San Pablo Bay...

  5. Wind resource assessment: San Nicolas Island, California

    Energy Technology Data Exchange (ETDEWEB)

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

    1996-01-01

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

  6. Synthetic seismicity for the San Andreas fault

    Directory of Open Access Journals (Sweden)

    S. N. Ward

    1994-06-01

    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.

  7. Puente Coronado - San Diego (EE. UU.

    Directory of Open Access Journals (Sweden)

    Editorial, Equipo

    1971-12-01

    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 orttropos de los Estados Unidos de Amrica. Su infraestructura est constituida por pilas de hormign armado apoyadas sobre pilotes o sobre zapatas, segn estn en el mar o en tierra firme. La superestructura est formada, en parte, por chapas metlicas y, en parte, por vigas cajn. El acabado del tablero metlico se realiz a base de hormign asfltico de epoxi con un espesor de 5 cm. La pintura es especial y se compone de capas de vinilo, de xido de hierro y de vinilo azul sobre una capa de cinc.

  8. The radiological accident in San Salvador

    International Nuclear Information System (INIS)

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

  9. Water chemistry of San Marcos area, Guatemala

    Energy Technology Data Exchange (ETDEWEB)

    Marini, Luigi [Universita di Genova, Dip. di Scienze della Terra, Genova (Italy); Cioni, Roberto; Guidi, Massimo [CNR, Ist. di Geocronologia e Geochimica Isotopica, Pisa (Italy)

    1998-06-01

    Two well-equilibrated Na-Cl geothermal liquids are recognisable in the San Marcos area. Both have the same Cl concentration (540 mg/kg) and the same isotopic composition ({delta}D of -66.5 per mille and {delta}{sup 18}O of -9 per mille) under reservoir conditions, but they come from two distinct aquifers with different temperatures , i.e. 240degC below La Cimarrona and 185degC below La Castalia. The numerous thermal Na-Cl to Na-Cl-HCO{sub 3} springs located in the San Marcos areas originate through dilution and boiling of these two geothermal liquids and different degrees of re-equilibration at lower temperatures. Silica and K contents are useful in discriminating between dilution, boiling and re-equilibration phenomena. Thermal Na-HCO{sub 3} waters, generated through conductive heat transfer or input of geothermal vapor or gases from below, delineate the extent of the geothermal reservoir(s) at depth. (Author)

  10. The Choiyoi volcanic province at 34°S-36°S (San Rafael, Mendoza, Argentina): Implications for the Late Palaeozoic evolution of the southwestern margin of Gondwana

    Science.gov (United States)

    Kleiman, Laura E.; Japas, María S.

    2009-08-01

    The Choiyoi rhyolitic province of Chile and Argentina (23°S-42°S) was emplaced at the SW margin of Gondwana during the Permian. The San Rafael Massif (Mendoza, Argentina, 34°-36°S), is a key area to analyse the relative timing of Choyoi magmatism and related deformation as it bears one of the most complete and well exposed succession. Stratigraphic, structural and magmatic studies indicate that major changes of geodynamic conditions occurred during the Permian since arc-related sequences syntectonic with transpression (lower Choiyoi) were followed by transitional to intraplate, postorogenic suites coeval with transtension (upper Choiyoi). During the Early Permian, a major event of N-NNW dextral transpressional motions deformed the Carboniferous foreland basin in the San Rafael Massif. This event is attributed to the first episode of the San Rafael orogeny and can be related to oblique subduction (Az. 30°) of the Palaeo-Pacific plate. Ca. 280 Ma the inception of voluminous calc-alkaline volcanism (lower Choiyoi) syntectonic with WNW sinistral transpression of the second episode of the San Rafael orogeny, is associated with an eastward migration of the magmatic arc at this latitude. To the southeast of San Rafael, magmatism and transpression continued to migrate inland suggesting that a progressively younger, WNW, sinistral, thick skinned deformation belt broadens into the foreland and can be traced from San Rafael to Sierra de la Ventana, linking the San Rafael orogeny with the Gondwanide orogeny of the Cape Fold Belt in South Africa. This distribution of magmatism and deformation is interpreted as being the consequence of a progressive shallowing of the Palaeo-Pacific plate starting to the north of San Rafael, and culminating with a flat-slab region south of 36°S. Ca. 265 Ma the onset of predominantly felsic volcanism (upper Choiyoi) in San Rafael occurred in a Post-San Rafael extensional setting. Kinematic indicators and strain fabric analyses of San Rafael orogeny transpression and Post-San Rafael extension show a tectonic reversion. The Post-San Rafael event could be the result of the extensional collapse of the San Rafael orogen, triggered by continental-scale clockwise rotations. These rotations would account for subduction ceasing earlier in the north (31°S-36°S) than in the south, thus explaining the coexistence, after ˜ 265 Ma, of extension in San Rafael with compression in the Sierra de la Ventana-Cape Fold Belt area.

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

    Directory of Open Access Journals (Sweden)

    Jongcheol Lee

    2015-03-01

    Full Text Available 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 apapproval 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.

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

    Directory of Open Access Journals (Sweden)

    Paolo Cova

    2012-02-01

    Full Text Available Lintervento propone, attraverso lindagine di alcuni dipinti di area forlivese, una prima ricostruzione della personalit 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 dallanalisi dellaffresco dellOratorio di San Giovanni Battista a Meldola, per poi allargarsi ad altre emergenze del territorio circostante, fino ai lacerti pittorici emersi nella chiesa della Santissima Trinit di Forl. Nella prima parte dellarticolo viene ricostruita la storia dellOratorio di San Giovanni Battista presso Villa Fronticelli a Meldola: gi magione templare di Santa Maria Biacque, nel 1312, in seguito al processo ai templari, pass alle dipendenze della precettoria dei cavalieri gerosolimitani di San Giovanni di Palareto. La realizzazione dellaffresco deve essere probabilmente inserita allinterno dei lavori di ristrutturazione intrapresi dai giovanniti dopo la met del XV secolo.Nella seconda parte dellarticolo invece si procede alle indagini tecniche e stilistiche relative alla pittura murale che rappresenta la Madonna col Bambino e San Giovanni Battista. Laffresco mutilo opera di un interessante maestro che agisce nella sfera del tardogotico locale, mostrando per tenui accenti rinascimentali caratteristici alla pittura forlivese tra sesto e settimo decennio del Quattrocento. Muovendo dalle ricerche di Anna Tambini e Giordani Viroli, attraverso lanalisi di diverse testimonianze del territorio, viene cos proposta la ricostruzione di un corpus pittorico caratterizzato da stringenti affinit stilistiche, che, confermando lappartenenza 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 allavvento della 'brigada melozziana'.

  13. Vocational Education and Federal Policy in San Francisco.

    Science.gov (United States)

    Kirst, Michael W.; Rabe, Barry G.

    The federal government role is significant in the San Francisco vocational education system which has two primary delivery systems--the San Francisco Unified School District (SFUSD) and Community College District (SFCCD). The SFUSP is hampered by the city's pluralistic and decentralized governance approach. Although the state was not irrelevant in

  14. San Ysidro High School: An Invincible Sense of Promise

    Science.gov (United States)

    Principal Leadership, 2013

    2013-01-01

    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

  15. 75 FR 48306 - San Juan National Forest Resource Advisory Committee

    Science.gov (United States)

    2010-08-10

    ... Forest Service San Juan National Forest Resource Advisory Committee AGENCY: Forest Service, USDA. ACTION: Notice of meeting. SUMMARY: The San Juan National Forest Resource Advisory Council (RAC) will meet in... will be held Wednesday, September 8, 2010, 9 a.m.-4 p.m. ADDRESSES: The meeting will be held at the...

  16. 76 FR 12692 - San Juan National Forest Resource Advisory Committee

    Science.gov (United States)

    2011-03-08

    ... Forest Service San Juan National Forest Resource Advisory Committee AGENCY: Forest Service, USDA. ACTION: Notice of meeting. SUMMARY: The San Juan National Forest Resource Advisory Council (RAC) will meet in... will be held Friday, March 18, 2011, 9 a.m.--12:30 p.m. ADDRESSES: The meeting will be held at the...

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

    Science.gov (United States)

    Holzman, Michael; Tewel, Kenneth J.

    1992-01-01

    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.…

  18. 27 CFR 9.157 - San Francisco Bay.

    Science.gov (United States)

    2010-04-01

    ... viticultural area are 47 1:24,000 Scale USGS topographic maps. They are titled: (1) Pacheco Peak, California... parallel with State Route 152 on the Pacheco Peak Quadrangle. (2) Then proceed in a northwesterly direction... southeast along the north and east shorelines of San Pablo Bay, also known as the San Pablo Bay...

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

    Science.gov (United States)

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

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

  20. 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)

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

    1996-03-01

    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.

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

    Science.gov (United States)

    Ockerman, Darwin J.

    2002-01-01

    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.

  2. 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)

    Cristina Liébana Presa

    2012-06-01

    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.

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

    International Nuclear Information System (INIS)

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

  4. Traditional Herbal Formula Oyaksungi-San Inhibits Adipogenesis in 3T3-L1 Adipocytes

    OpenAIRE

    Sae-Rom Yoo; Chang-Seob Seo; Hyeun-Kyoo Shin; Soo-Jin Jeong

    2015-01-01

    Background. Oyaksungi-san (OYSGS) is a herbal formula that has been used for treating cardiovascular diseases in traditional Asian medicine. Here, we investigated the antiadipogenic effect of OYSGS extract in 3T3-L1 adipose cells. Methods. 3T3-L1 preadipocytes were differentiated into adipocytes with or without OYSGS. After differentiation, we measured Oil Red O staining, glycerol-3-phosphate dehydrogenase (GPDH) activity, leptin production, mRNA, and protein levels of adipogenesis-related fa...

  5. Cultural conflicts, dilemmas and disillusionment among the San communities at Platfontein

    OpenAIRE

    Bahta, G T

    2014-01-01

    This article examines the cultural conflicts, dilemmas and disillusionment among the San communities at Platfontein in the Northern Cape province of South Africa. A critical review of written texts, interviews, observations and focus group discussions with the community knowledge-holders shows that the community’s new Westernised lifestyle in the midst of the capitalist society at Platfontein turns the collective spirit, human relations, mutual reverence, sincerity and self-con...

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

    OpenAIRE

    Gentner, D. R.; T. B. Ford; Guha, A.; K. Boulanger; J. Brioude; W. M. Angevine; de Gouw, J. A.; C. Warneke; J. B. Gilman; Ryerson, T. B.; Peischl, J; Meinardi, S.; Blake, D. R.; Atlas, E.; W. A. Lonneman

    2013-01-01

    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 th...

  7. 77 FR 28895 - Don Edwards San Francisco Bay National Wildlife Refuge, Alameda, Santa Clara, and San Mateo...

    Science.gov (United States)

    2012-05-16

    ... Federal Register notice of intent on February 23, 2010 (75 FR 8106), to solicit additional comments. To... Fish and Wildlife Service Don Edwards San Francisco Bay National Wildlife Refuge, Alameda, Santa Clara, and San Mateo Counties, CA AGENCY: Fish and Wildlife Service, Interior. ACTION: Notice of...

  8. 75 FR 17329 - Safety Zone; Big Bay Fourth of July Fireworks, San Diego Bay, San Diego, CA

    Science.gov (United States)

    2010-04-06

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Big Bay Fourth of July Fireworks, San Diego... support of the Big Bay July Fourth Show to Benefit the San Diego Armed Services YMCA. This temporary... January 17, 2008, issue of the Federal Register (73 FR 3316). Public Meeting We do not now plan to hold...

  9. 77 FR 34984 - Notice of Intent To Repatriate a Cultural Item: San Diego Museum of Man, San Diego, CA

    Science.gov (United States)

    2012-06-12

    ..., institution, or Federal agency that has control of the Native American cultural item. The National Park... National Park Service Notice of Intent To Repatriate a Cultural Item: San Diego Museum of Man, San Diego... consultation with the appropriate Indian tribes, has determined that a cultural item meets the definition...

  10. 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

    FABIÁN M JAKSIC

    2001-01-01

    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 Ap...

  11. Microbial biogeography of San Francisco Bay sediments

    Science.gov (United States)

    Lee, J. A.; Francis, C. A.

    2014-12-01

    The largest estuary on the west coast of North America, San Francisco Bay is an ecosystem of enormous biodiversity, and also enormous human impact. The benthos has experienced dredging, occupation by invasive species, and over a century of sediment input as a result of hydraulic mining. Although the Bay's great cultural and ecological importance has inspired numerous surveys of the benthic macrofauna, to date there has been almost no investigation of the microbial communities on the Bay floor. An understanding of those microbial communities would contribute significantly to our understanding of both the biogeochemical processes (which are driven by the microbiota) and the physical processes (which contribute to microbial distributions) in the Bay. Here, we present the first broad survey of bacterial and archaeal taxa in the sediments of the San Francisco Bay. We conducted 16S rRNA community sequencing of bacteria and archaea in sediment samples taken bimonthly for one year, from five sites spanning the salinity gradient between Suisun and Central Bay, in order to capture the effect of both spatial and temporal environmental variation on microbial diversity. From the same samples we also conducted deep sequencing of a nitrogen-cycling functional gene, nirS, allowing an assessment of evolutionary diversity at a much finer taxonomic scale within an important and widespread functional group of bacteria. We paired these sequencing projects with extensive geochemical metadata as well as information about macrofaunal distribution. Our data reveal a diversity of distinct biogeographical patterns among different taxa: clades ubiquitous across sites; clades that respond to measurable environmental drivers; and clades that show geographical site-specificity. These community datasets allow us to test the hypothesis that salinity is a major driver of both overall microbial community structure and community structure of the denitrifying bacteria specifically; and to assess whether patterns of diversity observed at the broadest of taxonomic scales also apply to patterns observed within a single extremely diverse gene (nirS). In sum, this project provides a first look at the forces driving the migration and selection of microbial communities in San Francisco Bay.

  12. SAN/CXFS test report to LLNL

    Energy Technology Data Exchange (ETDEWEB)

    Ruwart, T M; Eldel, A

    2000-01-01

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

  13. Demography of the San Francisco gartersnake in coastal San Mateo County, California

    Science.gov (United States)

    Halstead, Brian J.; Wylie, Glenn D.; Amarello, Melissa; Smith, Jeffrey J.; Thompson, Michelle E.; Routman, Eric J.; Casazza, Michael L.

    2011-01-01

    The San Francisco gartersnake Thamnophis sirtalis tetrataenia has been federally listed as endangered since 1967, but little demographic information exists for this species. We examined the demography of a San Francisco gartersnake population on approximately 213 ha of California coastal prairie in San Mateo County, California, from 2007 to 2010. The best-supported mark-recapture model indicated annual variation in daily capture probabilities and annual survival rates. Abundance increased throughout the study period, with a mean total population from 2008 to 2010 of 443 (95% CI = 313-646) individuals. Annual survival was slightly greater than that of most other gartersnakes, with an annual probability of survival of 0.78 (0.55-0.95) in 2008-2009 and 0.75 (0.49-0.93) in 2009-2010. Mean annual per capita recruitment rates were 0.73 (0.02-2.50) in 2008-2009 and 0.47 (0.02-1.42) in 2009-2010. From 2008 to 2010, the probability of an increase in abundance at this site was 0.873, with an estimated increase of 115 (-82 to 326) individuals. The estimated population growth rate in 2008-2009 was 1.52 (0.73-3.29) and in 2009-2010 was 1.21 (0.70-2.17). Although this population is probably stable or increasing in the short term, long-term studies of the status of the San Francisco gartersnake at other sites are required to estimate population trends and to elucidate mechanisms that promote the recovery of this charismatic member of our native herpetofauna.

  14. Aerial radiological survey of the San Onofre Nuclear Generating Station and surrounding area, San Clemente, California

    International Nuclear Information System (INIS)

    An airborne radiological survey of an 11 km2 area surrounding the San Onofre Nuclear Generating Station was made 9 to 17 January 1980. Count rates observed at 60 m altitude were converted to exposure rates at 1 m above the ground and are presented in the form of an isopleth map. Detected radioisotopes and their associated gamma ray exposure rates were consistent with that expected from normal background emitters, except directly over the plant

  15. 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

  16. san Andrs, Pinar del Ro, Cuba

    Directory of Open Access Journals (Sweden)

    N. Valds-Rodriguez

    2006-01-01

    Full Text Available El presente trabajo se realiz en la Unidad Forestal San Andrs, en el rea que corresponde a las alturas de pizarras, tuvo como objetivo realizar una valoracin de diferentes aspectos de su morfologa y el endemismo de las especies de plantas leosas acompaantes en los ecosistemas de pinares naturales presentes en esa zona. Para realizar esta valoracin se tomaron en cuenta aspectos como el tipo biolgico, la textura de la hoja, el tamao de la planta, la distribucin de la especie y la familia de las especies recolectadas en las zonas de muestreo. Se lleg a la conclusin de que la vegetacin acompaante se caracteriza por ser especies de pequeo a mediano tamao, con hojas medianamente pequeas, y que no existe entre estas especies ninguna endmica a nivel de distrito o local.

  17. Paleomagnetism of San Cristobal Island, Galapagos

    Science.gov (United States)

    Cox, A.

    1971-01-01

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

  18. del ingreso en San Miguel Coatln, Oaxaca

    Directory of Open Access Journals (Sweden)

    Renato Salas Alfaro

    2013-01-01

    Full Text Available En esta investigacin se evala una hiptesis que sostiene que en las comunidades rurales la reciente migracin internacional ha inducido una mayor desigualdad en la distribucin del ingreso (Stark, Taylor y Yitzhaki, 1986. Para analizar el efecto de las remesas internacionales sobre la distribucin del ingreso en una muestra de 37% de los hogares en San Miguel Coatln, Oaxaca, se ha utilizado la descomposicin 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 distribucin; la historia migratoria no decide la forma de la distribucin, sino que depende ms bien de la estructura de los hogares que perciben las remesas, de la importancia de stas respecto a los dems ingresos, y de ciertas formas culturales que propician la incorporacin a la migracin de algunos miembros de hogares de todos los estratos econmicos de la comunidad.

  19. San Carlos Apache Tribe - Energy Organizational Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Rapp, James; Albert, Steve

    2012-04-01

    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.

  20. El caso de San Mateo Atenco

    Directory of Open Access Journals (Sweden)

    Hugo Javier Fuentes Castro

    2006-01-01

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

  1. de San Ildefonso de Recuay (1720

    Directory of Open Access Journals (Sweden)

    Daniel Guzmán Salinas

    2007-01-01

    Full Text Available Las doctrinas de evangelización se constituyeron como espacios donde confl uyeron las relaciones sociales más variadas del panorama colonial. Son escenarios donde, por la diversidad social y cultural que se instaló, presentaron una constante negociación entre los grupos de poder -curas, caciques, autoridades estatales y eclesiásticas- lo cual no garantizaba la falta de confl ictos. El año de 1720, en el pueblo de San Ildefonso de Recuay terminaba un caso aparentemente regular contra el cura doctrinero, pero la complejidad del caso se hace visible al descubrir las redes de intereses y manejos del poder que se encuentran detrás del proceso y se conectan con pleitos anteriores, aparentemente concluidos.

  2. Petrologa del plutn La Florida, sierra de San Luis / Petrology of the La Florida stock, Sierra de San Luis

    Scientific Electronic Library Online (English)

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

    2007-09-01

    Full Text Available El plutn 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 morfologa semicircular, ligeramente elongado en direccin oblicua a la foliacin [...] regional, la cual acompaa la forma del plutn en el contacto. Su composicin es monzograntica y marcadamente peraluminoso, y est 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 porfiroblstica, aumenta, lo cual conduce a variaciones notables del ndice de color de las rocas. Adems, se registra una abundante pegmatizacin que forma tanto diques como cuerpos irregulares en el borde del intrusivo y tambin en las rocas de caja adyacentes al contacto. Esta zonacin sera resultado del incremento de fluidos acuosos durante la etapa tardo magmtica, que causaron reacciones subslidas en la mineraloga ortomagmtica. El magma est 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 plutn de La Florida exhibe algunas diferencias geolgicas, petrogrficas y composionales con otros granitoides sin-cinemticos de la sierra de San Luis, encontrndose algunas similitudes solamente con rocas del cordn 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.

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

    Energy Technology Data Exchange (ETDEWEB)

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

    1989-09-01

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

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

    Science.gov (United States)

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

    2005-01-01

    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…

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

    Science.gov (United States)

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

  6. Emissions of organic carbon and methane from petroleum and dairy operations in Californias 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 incr...

  7. 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

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

    Energy Technology Data Exchange (ETDEWEB)

    Varney, Peter J.

    2002-04-23

    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.

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

    Science.gov (United States)

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

    2012-12-01

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

  10. The wister mud pot lineament: Southeastward extension or abandoned strand of the San Andreas fault?

    Science.gov (United States)

    Lynch, D.K.; Hudnut, K.W.

    2008-01-01

    We present the results of a survey of mud pots in the Wister Unit of the Imperial Wildlife Area. Thirty-three mud pots, pot clusters, or related geothermal vents (hundreds of pots in all) were identified, and most were found to cluster along a northwest-trending line that is more or less coincident with the postulated Sand Hills fault. An extrapolation of the trace of the San Andreas fault southeastward from its accepted terminus north of Bombay Beach very nearly coincides with the mud pot lineament and may represent a surface manifestation of the San Andreas fault southeast of the Salton Sea. Additionally, a recent survey of vents near Mullet Island in the Salton Sea revealed eight areas along a northwest-striking line where gas was bubbling up through the water and in two cases hot mud and water were being violently ejected.

  11. SANS investigation of microstructure evolution in high chromium ODS steels after thermal ageing

    Science.gov (United States)

    Szraz, Z.; Trk, Gy.; Krjak, V.; Hhner, P.

    2013-04-01

    In the present paper the small-angle neutron scattering (SANS) technique was used to investigate the phase separation in two oxide dispersion strengthened (ODS) ferritic steels, PM2000 and MA956, during isothermal ageing at 475 C. The ferritic matrix of the investigated materials separates into Fe-rich ? and Cr-rich ?' phases during ageing at this temperature. The samples were measured under magnetic field in order to separate the nuclear and magnetic scattering intensities. The ratio of these two contributions was used to gain information on the chemical composition of the scatterers. The SANS measurements revealed the formation and subsequent growth of Cr-rich precipitates on the nanometer scale. The size distributions and the volume fractions of the precipitates were evaluated from the scattering data. Microhardness was found to significantly increase as a function of ageing time for both materials. The hardening is related to the formation of the Cr-rich ?' phase.

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

    International Nuclear Information System (INIS)

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

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

    Science.gov (United States)

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

    1983-01-01

    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

  14. Fitting the datum of SANS with Pxy program

    International Nuclear Information System (INIS)

    The thesis introduces the basic theory of Small-Angle neutron scattering, enumerates several approximate law. It simply describes the components of Small-Angle neutron spectrometer (SANS) and the parameters of SANS of Budapest Neutron Center (BNC) in Hungary. During the period of studying at Budapest Neutron Center in Hungary, the experiments of wavelength calibration was carried out with SIBE and the SANS experiments of sample Micelles. The experiments are briefly introduced. Pxy program is used to fit these datum, and the results of wavelength and sizes of sample Micelles are presented. (authors)

  15. Salinity and temperature measurements in San Francisco Bay waters, 1980

    Science.gov (United States)

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

    1981-01-01

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

  16. 40 CFR 81.165 - San Joaquin Valley Intrastate Air Quality Control Region.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 17 2010-07-01 2010-07-01 false San Joaquin Valley Intrastate Air... Air Quality Control Regions 81.165 San Joaquin Valley Intrastate Air Quality Control Region. The San...: Fresno County, Kings County, Madera County, Merced County, San Joaquin County, Stanislaus County,...

  17. The Prison Notebook: Lessons Learned Teaching Anthropology at San Quentin State Prison

    OpenAIRE

    Cohen, David R; Panich, Lee

    2009-01-01

    This article addresses our strategies for teaching anthropological archaeology at San Quentin State Prison in California. For over 150 years, San Quentin State Prison has stood along the San Francisco Bay. Designed to hold 3,317 inmates, today 5,222 men are incarcerated at San Quentin some of whom may have been great anthropologists had their lives turned out differently.

  18. Study of vibrations and stabilization of linear collider final doublets at the sub-nanometer scale; Etude des vibrations et de la stabilisation a l'echelle sous-nanometrique des doublets finaux d'un collisionneur lineaire

    Energy Technology Data Exchange (ETDEWEB)

    Bolzon, B

    2007-11-15

    CLIC is one of the current projects of high energy linear colliders. Vertical beam sizes of 0.7 nm at the time of the collision and fast ground motion of a few nanometers impose an active stabilization of the final doublets at a fifth of nanometer above 4 Hz. The majority of my work concerned vibrations and active stabilization study of cantilever and slim beams in order to be representative of the final doublets of CLIC. In a first part, measured performances of different types of vibration sensors associated to an appropriate instrumentation showed that accurate measurements of ground motion are possible from 0.1 Hz up to 2000 Hz on a quiet site. Also, electrochemical sensors answering a priori the specifications of CLIC can be incorporated in the active stabilization at a fifth of nanometer. In a second part, an experimental and numerical study of beam vibrations enabled to validate the efficiency of the numerical prediction incorporated then in the simulation of the active stabilization. Also, a study of the impact of ground motion and of acoustic noise on beam vibrations showed that an active stabilization is necessary at least up to 1000 Hz. In a third part, results on the active stabilization of a beam at its two first resonances are shown down to amplitudes of a tenth of nanometer above 4 Hz by using in parallel a commercial system performing passive and active stabilization of the clamping. The last part is related to a study of a support for the final doublets of a linear collider prototype in phase of finalization, the ATF2 prototype. This work showed that relative motion between this support and the ground is below imposed tolerances (6 nm above 0.1 Hz) with appropriate boundary conditions. (author)

  19. Investigating Sources and Emissions of Volatile Organic Compounds in California's San Joaquin Valley

    Science.gov (United States)

    Gentner, D. R.; Harley, R. A.; Weber, R.; Karlik, J. F.; Goldstein, A. H.

    2011-12-01

    Emissions of Volatile Organic Compounds (VOCs) are regulated both as primary air pollutants and as precursors to the formation of secondary organic aerosol and tropospheric ozone. The San Joaquin Valley, a non-attainment area for ozone and PM2.5, contains a variety of point, area, and mobile VOC sources that contribute to both primary and secondary pollution. Using ambient measurements of over 100 different VOCs and Intermediate Volatility Organic Compounds (IVOCs) made at multiple field sites, we assess the magnitude and importance of various VOC sources in the San Joaquin Valley. Hourly measurements were made during the spring and summer of 2010 via in-situ gas chromatography in Bakersfield, CA as part of the CalNex experiment and also at a rural site located 100 km north of Bakersfield. Additionally, in-situ measurements of fresh motor vehicle exhaust were made in Oakland's Caldecott tunnel during the summer of 2010. Measurements include a broad array of anthropogenic and biogenic VOCs ranging in size from 1 to 17 carbon atoms, including many compounds with functional groups or substituents (e.g. aldehydes, ketones, alcohols, halogens, sulfur, & nitrogen). Using statistical methods of source apportionment, covariance, source receptor modeling, and air parcel back trajectories, we assess the impact of various sources on observed VOC concentrations at our field sites in the San Joaquin Valley. Prevalent sources include gasoline and diesel-vehicle exhaust, petroleum extraction/refining, biogenic emissions from agricultural crops and natural vegetation, and emissions from dairy operations and animal husbandry. We use measurements of fresh motor vehicle emissions from the Caldecott tunnel to constrain apportionment of gasoline and diesel-related VOCs and IVOCs in the San Joaquin Valley. Initial results from Bakersfield show substantial influence from local anthropogenic VOC sources, but there is evidence for transport of emissions from both anthropogenic and biogenic sources elsewhere in the region. For example, large biogenic sources appear to be regional rather than local since concentrations of isoprene peak in the late afternoon/evening suggesting transport from northern parts of the valley. We observed elevated concentrations of numerous alcohols and carbonyls in the San Joaquin Valley; for example mixing ratios of ethanol and acetone at the Bakersfield supersite had inner quartile ranges of 1.2-9.4 ppbv and 0.58-1.6 ppbv, with daytime averages near 2 and 1 ppbv, respectively. Additionally, we assess the sources and emissions of the IVOCs observed in the San Joaquin Valley, which include polycyclic aromatic hydrocarbons, large biogenic compounds, and high molecular weight alkanes and aromatics.

  20. Estudio petrogrfico de las facies piroclsticas de la Formacin 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)

    Amancay N. Martnez

    2010-11-01

    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 gneas de edad trisica con espesores que llegan hasta los 4.000 metros. Las rocas gneas de la Formacin Cerro Varela forman parte del cerro homnimo que constituye los ltimos asomos australes de la sierra de San Luis. Las riolitas trisicas que afloran en la sierra de Varela se disponen dentro de un esquema estructural extensional asociado a la formacin de cuencas de tipo rift. Las unidades analizadas de la Formacin Cerro Varela estn compuestas por tobas cristalinas tanto de alto grado como de bajo grado de soldadura, de composicin rioltica e interpretadas como depsitos originados por flujos piroclsticos. Por su litologa, edad y contexto regional, las rocas de la Formacin Cerro Varela integran el magmatismo gondwnico del Grupo Choiyoi de edad permotrisica 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.

  1. San Francisco Bay, California 1 arc-second DEM

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The 1-second San Francisco Bay, California Elevation Grid provides bathymetric data in ASCII raster format of 1-second resolution in geographic coordinates. This...

  2. Contaminants investigation of the San Antonio River of Texas, 1995

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — In 1992, the U.S. Fish and Wildlife Service conducted a contaminants investigation on fish collected from the San Antonio and Guadalupe Rivers in southeast Texas....

  3. San Juan, Puerto Rico Tsunami Forecast Grids for MOST Model

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The San Juan, Puerto Rico Forecast Model Grids provides bathymetric data strictly for tsunami inundation modeling with the Method of Splitting Tsunami (MOST) model....

  4. Rent Affordability Gap by Neighborhood, San Francisco, CA

    Data.gov (United States)

    U.S. Department of Health & Human Services — The data illustrate the number of minimum wage jobs that would be required to afford a two-bedroom rental unit at fair market rent value in San Francisco, as well...

  5. San Antonio, Texas as seen from STS-58

    Science.gov (United States)

    1993-01-01

    This sharp cloud-free photograph of San Antonio, Texas illustrates the classic pattern of western cities. The Hispanic heart of the city, an intertwining of streets along the San Antonio River and around the Alamo, surrounded by a late 19th century Anglo grid of small businesses and suburban homes. Transportation routes radiate to mid and late 20th century ring corridors separating the urban/suburban region from the surrounding agricultural countryside. Limestone quarries are conspicuous along the edge of the Balcones Escarpment, at the foot of which San Antonio was founded. Randolph Air Force Base is outside the city to the northeast, Fort Sam Houston is contained within the northeast quadrant of the city, Brooks Air Force Base lies at the southeastern corner, and Lackland and Kelly Air Force Bases are within the suburban fringe to the southwest. San Antonio International Airport can be seen at the foot of the escarpment in the northern part of the city.

  6. Rare Plants - City of San Diego [ds455

    Data.gov (United States)

    California Department of Resources — The Biological Monitoring Plan (BMP; Ogden 1996) for the Multiple Species Conservation Program (MSCP) was developed in 1996 and is a component of the City of San...

  7. Faults--Offshore of San Francisco Map Area, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for faults for the geologic and geomorphic map of the Offshore San Francisco map area, California. The vector data file is...

  8. Availability of hydrologic data in San Juan County, New Mexico

    Science.gov (United States)

    Klausing, R.L.; Welder, G.E.

    1984-01-01

    San Juan County, in the northwestern corner of New Mexico, uses surface water from the San Juan, Animas, and La Plata Rivers as a principal source of water for the county, but the water in these streams is fully appropriated. Ground water is present in San Juan County in several bedrock formations and in the alluvium of the river valleys. This report describes the hydrologic data that have been collected in San Juan County, presents examples of the data, shows the locations of the data-collection sites, and indicates where more complete records may be obtained. This data base should be helpful in assessing the quantity, quality, and availability of the county 's water resources. Information collected at 1,877 water wells, 39 streamflow-gaging stations, and 172 springs is presented. The collection sites and geology are shown on a base map with a scale of 1 inch = 2 miles. (USGS).

  9. National Status and Trends: Bioeffects Program - San Francisco Bay Database

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This study was based on the sediment quality triad (SQT) approach. A stratified probabilistic sampling design was utilized to characterize the San Francisco Bay...

  10. San Francisco Bay Water Quality Improvement Fund 2015

    Data.gov (United States)

    U.S. Environmental Protection Agency The San Francisco Bay Water Quality Improvement Fund is a competitive grant program that is helping implement TMDLs to improve water quality, protect wetlands, and...

  11. Final San Andres National Wildlife Refuge Comprehensive Conservation Plan

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior This Comprehensive Conservation Plan CCP was written to guide management on San Andres NWR for the next 15 years. This plan outlines the Refuge vision and purpose...

  12. Seafloor character--Offshore of San Gregorio, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3306 presents data for the seafloor-character map (see sheet 5, SIM 3306) of the Offshore of San Gregorio map area, California. The raster data...

  13. Vegetation Mapping - Tecolote Canyon, San Diego Co. [ds656

    Data.gov (United States)

    California Department of Resources — Vegetation mapping has been conducted at various City of San Diego Park and Recreation Open Space lands in support of natural resource management objectives and the...

  14. National Status and Trends: Bioeffects Program - San Francisco Bay Database

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce This study was based on the sediment quality triad (SQT) approach. A stratified probabilistic sampling design was utilized to characterize the San Francisco Bay...

  15. San Francisco Littoral Cell CRSMP Sensitive Habitat 2012

    Data.gov (United States)

    California Department of Resources — Ecological regions of interest as identified in the San Francisco Coastal Region Sediment Management Plan.NPS identifies several special management areas within the...

  16. The Trail Inventory of San Bernardino NWR [Cycle 2

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior The purpose of this report is to create a baseline inventory of all nonmotorized trails on San Bernardino National Wildlife Refuge. Trails in this inventory are...

  17. San Francisco Bay Conservation and Development Commission : Annual Report 1972

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Congress passed, and the President signed into law, legislation establishing the San Francisco Bay National Wildlife Refuge. When the purchase of property for...

  18. San Diego, California 1/3 arc-second DEM

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The 1/3-second San Diego, California Elevation Grid provides bathymetric data in ASCII raster format of 1/3-second resolution in geographic coordinates. This grid...

  19. Marine Seismic Reflection Profiles Data of San Francisco Bay Area

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior Dataset consists of two-dimensional marine seismic reflection profile data from the San Francisco Bay area. These data were acquired in 1997, with the vessel Davidt...

  20. Backscatter D [7125]--Offshore of San Francisco, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the acoustic-backscatter map of the Offshore of San Francisco map area, California. Backscatter data are provided as separate...

  1. Backscatter B [8101]--Offshore of San Francisco, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the acoustic-backscatter map of the Offshore of San Francisco map area, California. Backscatter data are provided as separate...

  2. Backscatter C [8101]--Offshore of San Francisco, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the acoustic-backscatter map of the Offshore of San Francisco map area, California. Backscatter data are provided as separate...

  3. Vernal Pool Amphibians, Shrimp, Plants - San Diego [ds188

    Data.gov (United States)

    California Department of Resources — In 2002, the City of San Diego (City) received funding through a U. S. Fish and Wildlife Service (USFWS) Section 6 Planning Grant to complete an inventory and...

  4. San Diego Littoral Cell CRSMP Receiver Sites 2009

    Data.gov (United States)

    California Department of Resources — A total of 27 possible placement sites (some with multiple placement footprints) are incorporated into this San Diego Coastal Regional Sediment Management Plan to...

  5. Final Critical Habitat for the San Marcos salamander (Eurycea nana)

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — To provide the user with a general idea of areas where final critical habitat for San Marcos salamander (Eurycea nana) occur based on the description provided in...

  6. San Francisco Bay National Wildlife Refuge Complex : Annual Narrative 1980

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This annual narrative report details the conditions and management of San Francisco Bay National Wildlife Refuge in 1980. The report begins with a general...

  7. Narrative Report : San Francisco Bay NWR Complex : Fiscal Year 1974

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This annual narrative report details the conditions and management of San Francisco Bay National Wildlife Refuge in 1974. The report begins with a general...

  8. San Pablo Bay National Wildlife Refuge: Final Comprehensive Conservation Plan

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This Comprehensive Conservation Plan CCP was written to guide management on San Pablo Bay NWR for the next 15 years. This plan outlines the Refuge vision and...

  9. Earthquake Damage in San Francisco, CA, April 18, 1906

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The 1906 San Francisco earthquake was the largest event (magnitude 8.3) to occur in the conterminous United States in the 20th Century. Recent estimates indicate...

  10. San Francisco-Pacifica Coast Landslide Susceptibility 2011

    Data.gov (United States)

    California Department of Resources — The San Francisco-Pacifica Coast grid map was extracted from the California Geological Survey Map Sheet 58 that covers the entire state of California and originally...

  11. Baseline Surveys - Tecolote Canyon, San Diego Co. [ds655

    Data.gov (United States)

    California Department of Resources — Various resource projects have been conducted in the City of San Diego's Open Space Parks as part of the implementation of the City's Multiple Species Conservation...

  12. San Francisco-Pacifica Coast Landslide Susceptibility 2011

    Data.gov (United States)

    California Department of Resources The San Francisco-Pacifica Coast grid map was extracted from the California Geological Survey Map Sheet 58 that covers the entire state of California and originally...

  13. San Francisco Department of Public Health Flu Shot Locations 2013

    Data.gov (United States)

    U.S. Department of Health & Human Services — List of San Francisco Department of Public Health clinics offering flu vaccinations throughout the city in fall 2013.This dataset complies with the emerging Data...

  14. Bathymetry Hillshade--Offshore of San Francisco, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetry and shaded-relief maps of Offshore of San Francisco, California (raster data file is included in...

  15. Backscatter A [8101]--Offshore of San Francisco, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the acoustic-backscatter map of the Offshore of San Francisco map area, California. Backscatter data are provided as separate...

  16. San Sebastiani festivali varjutasid hiljutised terroriaktid / Aare Ermel

    Index Scriptorium Estoniae

    Ermel, Aare, 1957-2013

    2001-01-01

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

  17. NPP Tropical Forest: San Eusebio, Venezuela, 1970-1971

    Data.gov (United States)

    National Aeronautics and Space Administration ABSTRACT: Biomass, litterfall,a nd nutrient content of above- and below-ground vegetation and soil for a tropical montane forest at San Eusebio, Venezuela.

  18. The Trail Inventory of San Diego NWR [Cycle 2

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The purpose of this report is to create a baseline inventory of all nonmotorized trails on San Diego National Wildlife Refuge. Trails in this inventory are eligible...

  19. Folds--Offshore of San Gregorio Map Area, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3306 presents data for the folds for the geologic and geomorphic map (see sheet 10, SIM 3306) of the Offshore of San Gregorio map area, California....

  20. Faults--Offshore of San Gregorio Map Area, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3306 presents data for the faults for the geologic and geomorphic map (see sheet 10, SIM 3306) of the Offshore of San Gregorio map area,...

  1. Folds--Offshore of San Francisco Map Area, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for folds for the geologic and geomorphic map of the Offshore of San Francisco map area, California. The vector data file is...

  2. San Diego Littoral Cell CRSMP Potential Offshore Borrow Areas 2009

    Data.gov (United States)

    California Department of Resources — Offshore sediment sources along the entire reach of the San Diego Coastal RSM Plan region were previously identified by SANDAG and used for Regional Beach Sand...

  3. Marine Seismic Reflection Profiles Data of San Francisco Bay Area

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior Dataset consists of two-dimensional marine seismic reflection profile data from the San Francisco Bay area. These data were acquired in 1993, with the vessel David...

  4. NPP Tropical Forest: San Eusebio, Venezuela, 1970-1971

    Data.gov (United States)

    National Aeronautics and Space Administration — ABSTRACT: Biomass, litterfall,a nd nutrient content of above- and below-ground vegetation and soil for a tropical montane forest at San Eusebio, Venezuela.

  5. San Joaquin River National Wildlife Refuge: Final Comprehensive Conservation Plan

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This Comprehensive Conservation Plan CCP was written to guide management on San Joaquin River NWR for the next 15 years. This plan outlines the Refuge vision and...

  6. A record of hydrocarbon input to San Francisco Bay as traced by biomarker profiles in surface sediment and sediment cores

    Science.gov (United States)

    Hostettler, F.D.; Pereira, W.E.; Kvenvolden, K.A.; VanGeen, A.; Luoma, S.N.; Fuller, C.C.; Anima, R.

    1999-01-01

    San Francisco Bay is one of the world's largest urbanized estuarine systems. Its water and sediment receive organic input from a wide variety of sources; much of this organic material is anthropogenically derived. To document the spatial and historical record of the organic contaminant input, surficial sediment from 17 sites throughout San Francisco Bay and sediment cores from two locations Richardson Bay and San Pablo Bay were analyzed for biomarker constituents. Biomarkers, that is, 'molecular fossils', primarily hopanes, steranes, and n-alkanes, provide information on anthropogenic contamination, especially that related to petrogenic sources, as well as on recent input of biogenic material. The biomarker parameters from the surficial sediment and the upper horizons of the cores show a dominance of anthropogenic input, whereas the biomarker profiles at the lower horizons of the cores indicate primarily biogenic input. In the Richardson Bay core the gradual upcore transition from lower maturity background organics to a dominance of anthropogenic contamination occurred about 70-100 years ago and corresponds to the industrial development of the San Francisco Bay area. In San Pablo Bay, the transition was very abrupt, reflecting the complex depositional history of the area. This sharp transition, perhaps indicating a depositional hiatus or erosional period, dated at pre-1952, is clearly visible. Below, the hiatus the biomarker parameters are immature; above, they are mature and show an anthropogenic overlay. Higher concentrations of terrigenous n-alkanes in the upper horizons in this core are indicative of an increase in terrigenous organic matter input in San Pablo Bay, possibly a result of water diversion projects and changes in the fresh water flow into the Bay from the Delta. Alternatively, it could reflect a dilution of organic material in the lower core sections with hydraulic mining debris.

  7. Dos edificios administrativos, en San Francisco

    Directory of Open Access Journals (Sweden)

    Skidmore, Owings & Merrill, Arquitectos

    1964-07-01

    Full Text Available The Crown Zellerbach has been built on a large triangular plaza, at the outskirts of San Francisco. This is one of the most recent tall buildings in the city. The Wells Fargo Bank is also situated on this plaza. It is of special interest, both as regards its shape and functional organisation. It has a ground floor, where most of the mercantile activities take place, and a basement, containing a Council room; the strong rooms, with 2,500 private boxes as well as the bank's own safe; washing rooms; mechanical equipment rooms; a rest room; a bar for the employees and independent stairs. The building has a circular planform, 21.5 m in diameter and 354 m2 in area. The structure is metallic, the vertical supports are along the periphery, spaced every 1.626 m. The enclosing curtain walls are glass and anodized aluminium. The roof has radially distributed metal beams, interconnected by prefabricated concrete units, covered with copper sheeting. This bank, shaped like a hunting lodge, and finished with delicate care, contrasts sharply with the powerful volume of the Crown Zellerbach, and of other nearby buildings, and adds distinction to the plaza.Sobre una gran plaza triangular del extrarradio de San Francisco se alzan: el Crown Zellerbach, uno de sus más recientes rascacielos, y un bello pabellón independiente, el Wells Fargo Bank. El resto de la plaza es de dominio público. La originalidad, en forma y organización del segundo, ha hecho que le dediquemos la mayor atención: consta de una planta baja, en la que se desarrollan, prácticamente, todas las actividades mercantiles, y un piso inferior, en donde se distribuyen: un Salón de Consejos, el departamento de cajas de seguridad, con 2.500 unidades, y las cajas del Banco, los aseos, equipos mecánicos, etc., una sala de descanso y bar para los empleados, con escalera de acceso independiente. Tiene planta circular, de 21,5 m de diámetro y 354 m2 de superficie. La estructura es metálica, con soportes perimetrales, separados a 1,626 m entre ejes, y cerramiento de muros-cortina construidos a base de cristal y aluminio anodizado.

  8. Mathematical and numerical study of nonlinear hyperbolic equations: model coupling and nonclassical shocks; Etude mathematique et numerique d'equations hyperboliques non-lineaires: couplage de modeles et chocs non classiques

    Energy Technology Data Exchange (ETDEWEB)

    Boutin, B

    2009-11-15

    This thesis concerns the mathematical and numerical study of nonlinear hyperbolic partial differential equations. A first part deals with an emergent problematic: the coupling of hyperbolic equations. The pursued applications are linked with the mathematical coupling of computing platforms, dedicated to an adaptative simulation of multi-scale phenomena. We propose and analyze a new coupling formalism based on extended PDE systems avoiding the geometric treatment of the interfaces. In addition, it allows to formulate the problem in a multidimensional setting, with possible covering of the coupled models. This formalism allows in particular to equip the coupling procedure with viscous regularization mechanisms, useful in the selection of natural discontinuous solutions. We analyze existence and uniqueness in the framework of a parabolic regularization a la Dafermos. Existence of a solution holds true under very general conditions but failure of uniqueness may naturally arise as soon as resonance occurs at the interfaces. Next, we highlight that our extended PDE framework gives rise to another regularization strategy based on thick interfaces. In this setting, we prove existence and uniqueness of the solutions of the Cauchy problem for initial data in L{sup {infinity}}. The main tool consists in the derivation of a flexible and robust finite volume method for general triangulation which is analyzed in the setting of entropy measure-valued solutions by DiPerna. The second part is devoted to the definition of a finite volume scheme for the computing of nonclassical solutions of a scalar conservation law based on a kinetic relation. This scheme offers the feature to be stricto sensu conservative, in opposition to a Glimm approach that is only statistically conservative. The validity of our approach is illustrated through numerical examples. (author)

  9. 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

  10. 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

  11. Les architectures des rseaux pour des environnements entierement sans fil

    OpenAIRE

    Schiller, Eryk

    2010-01-01

    Dans ce document, nous avons tudi les nouvelles possibilits de routage et d'adressage dans les rseaux sans-fil multisauts spontans de grande taille (WMNs). Les WMNs promettent l'avenir un changement profond de l'architecture d'Internet, mais beaucoup de problmes restent rsoudre avant leur dploiement. Le routage, par exemple, est simple dans de petits rseaux statiques, mais les rseaux sans fil sont en pratique dynamiques : des liens peuvent apparatre et disparatre, des noeuds r...

  12. Approche inter-couches dans les rseaux sans fil

    OpenAIRE

    Berezin, Maria Eugenia

    2013-01-01

    Dans cette thse, nous examinons les aspects essentiels des rseaux locaux sans fil IEEE 802.11 (rseaux WiFi) en mode infrastructure, et identifions les problmes qui peuvent affecter leurs performances. Aprs avoir tudi l'tat de l'art, nous constatons que de nombreux efforts de recherche ont propos des solutions diverses mais prsentant des limitations qui empchent leur dploiement dans les rseaux locaux sans fil existants. En outre, les utilisateurs de ces rseaux ont des attentes to...

  13. San Diego Bay National Wildlife Refuge: Sweetwater Marsh and South San Diego Bay Units: Comprehensive Conservation Plan and Environmental Impact Statement: Volume I

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This Comprehensive Conservation Plan CCP was written to guide management on San Diego Bay NWR Sweetwater Marsh and South San Diego Bay Units for the next 15 years....

  14. Tables of basic data to accompany report on geologic and hydrologic features of the San Bernardino area, California, with special reference to underflow across the San Jacinto fault

    Science.gov (United States)

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

    1954-01-01

    This appendix presents a part of the basic data collected by the United States Geological Survey in cooperation with the San Bernardino County Flood Control District in the ground-water investigation of the San Bernardino area, California.

  15. Poziv: Duhovnost i san. San o oružju Franje Asiškoga

    OpenAIRE

    Balajić, Siniša

    2009-01-01

    San o oružju Franje Asiškoga doima se važnim elemenatom u proučavanju, ne toliko poziva Franje Asiškoga, koliko poziva uopće. Budući da se analizom i interpretacijom snova bave antropologija, psihologija, filozofija, teologija, itd., koncept razumijevanja ovoga sna uokviruje različita znanstvena (antropologija, psihologija) i teorijska načela (filozofija, teologija-duhovnost). Svjesni smo da proučavanje nečijega života, a pogotovo proučavanje nečijih snova, nije nimalo la...

  16. Tectonic inversion events in the western San Jorge Gulf Basin from seismic, borehole and field data

    Science.gov (United States)

    Navarrete, C. R.; Gianni, G. M.; Folguera, A.

    2015-12-01

    The San Jorge Gulf Basin, located in Central Patagonia, has been interpreted as a Jurassic-Cretaceous rift basin that was later inverted mainly in its western sector. Consequently, the Bernardides System formed as a set of foreland contractional structures that constitute the core of the Patagonian broken foreland, exhuming continental deposits of the Cretaceous Chubut Group, 500km away from the Pacific trench. In spite of the intense research done in the San Jorge Gulf Basin many aspects remain under discussion, particularly those regarding the age of uplift of the Bernrdides System. In order to unravel the tectonic evolution of the western San Jorge Gulf Basin (Ro Mayo Sub-Basin), we analyzed subsurface information (2D and 3D seismic lines and oil wells) located in the western area of the basin and compared this with surface data of the southern Bernrdides System. Based on our interpretation, the western part of the basin could have been uplifted in a series of deformational events that began as early as late Early Cretaceous, related to the initial uplift of the Patagonian broken foreland, during the early stages of South Atlantic opening. Subsequent stages of tectonic reactivation identified in this system have selectively inverted previous extensional structures according to the variable direction of the greatest horizontal stress (?1) acting at each time.

  17. 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, γ'-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.)

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

    International Nuclear Information System (INIS)

    Small Angle Neutron Scattering (SANS) experiments were made on several low alloy steels and submerged-arc welds prototypic of nuclear reactor vessel construction. To characterize radiation-enhanced and/or radiation-induced precipitation contributing to mechanical property changes observed in tensile and notch ductility tests of the materials. They were irradiated in UBR Test Reactor. Some of the samples were examined in the 288 degree C reirradiated (I) condition; others were examined in the postirradiation annealed (IA) condition and in the 288 degree C irradiated (IAR) condition. Experimental variables included material composition (primarily %Cu, %P, %Ni content), postirradiation annealing temperature (454 degree C and 399 degree C), reirradiation fluence level, and neutron-fluence rate (∼0.08, 0.7, and 9 x 1012 n/cm2-s-1, E > 1 MeV). The apparent influence of the described variables on size, number density, and composition of Cu-rich precipitates was the primary focus of the SANS analyses. SANS observations are related to measured notch ductility and tensile property changes, with a view toward mechanistic explanation of the observed mechanical property trends for I, IA, and IAR conditions

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

    International Nuclear Information System (INIS)

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

  20. Spawning, fertilization, and larval development of Potamocorbula amurensis (Mollusca: Bivalvia) from San Francisco Bay, California

    Science.gov (United States)

    Nicolini, M.H.; Penry, D.L.

    2000-01-01

    In Potamocorbula amurensis time for development to the straight-hinge larval stage is 48 hr at 15??C. Potamocorbula amurensis settles at a shell length of approximately 135 ??m 17 to 19 days after fertilization. Our observations of timing of larval devdlopment in P. amurensis support the hypothesis of earlier workers that its route of initial introduction to San Francisco Bay was as veliger larvae transported in ballast water by trans-Pacific cargo ships. The length of the larval period of P. amurensis relative to water mass residence times in San Francisco Bay suggests that it is sufficient to allow substantial dispersal from North Bay to South Bay populations in concordance with previous observations that genetic differentiation among populations of P. amurensis in San Francisco Bay is low. Potamocorbula amurensis is markedly euryhaline at all stages of development. Spawning and fertilization can occur at salinities from 5 to 25 psu, and eggs and sperms can each tolerance at least a 10-psu step increase or decrease in salinity. Embryos that are 2 hr old can tolerate the same range of salinities from (10 to 30 psu), and by the time they are 24 hr old they can tolerate the same range of salinities (2 to 30 psu) that adult clams can. The ability of P. amurensis larvae to tolerate substantial step changes in salinity suggests a strong potential to survive incomplete oceanic exchanges of ballast water and subsequent discharge into receiving waters across a broad range of salinities.

  1. Magnetic SANS study of a sintered Nd–Fe–B magnet: Estimation of defect size

    International Nuclear Information System (INIS)

    The magnetic microstructure of an isotropic sintered Nd–Fe–B permanent magnet was studied at room temperature by means of unpolarized magnetic-field-dependent small-angle neutron scattering (SANS). Although the microstructure of the material consists of micron-sized Nd2Fe14B crystallites that are separated by a (low volume fraction) nanometer-sized Nd-rich phase, the SANS signal contains a significant contribution due to spin misalignment, which is evidenced by an enhanced scattering signal along the direction of the applied field. The origin of this spin misalignment is presumably related to the perturbing effect of the Nd-rich interphases. Analysis of the SANS data in terms of the autocorrelation function of the spin misalignment provides an almost field-independent length scale lC ≅ 40 nm, which, for soft magnetic materials, is usually taken as a measure for the size of inhomogeneously magnetized regions around lattice imperfections. Comparison of our results with a phenomenological expression for lC based on micromagnetic theory suggests that the large anisotropy field of the Nd2Fe14B phase (which is of the order of 8 T) reduces the size of gradients in the spin microstructure, so that, for hard magnetic materials, lC represents the (field-independent) size of the characteristic defect in the microstructure

  2. Foreign tourism in San Jose downtown: volume, areas and resources used and impact on the environment

    Directory of Open Access Journals (Sweden)

    Eduardo Mora

    2013-06-01

    Full Text Available It presents the results of a study, conducted in 2011 and the first half of 2012, on some of the most important aspects of tourism in San Jose center: defining characteristics of tourists in this geographical space, activities carried out, areas and establishments that used and characteristics of these, major changes in land use in tourist areas and transformations -or inertia- in the landscape, hygiene, roads and transportation, safety and quality of public spaces. The collection of information was made in the field: GPS and “manual” inventories, scheduled observation, surveys and interviews. Mainly, it was concluded that since the late eighties, when tourist hatching occurred in Costa Rica, in small areas of San José downtown the establishments of interest and tourist use proliferated, but all of small dimensions (the relatively large are precedents. Consequently, the impact of tourism on the urban is not significant and is imperceptible in many ways, showing relevant only in a small area. In addition, tourism in San Jose downtown tends to decrease.

  3. An Integrated Study of the Grayburg/San Andres Reservoir Foster and South Cowden fields,

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-12-31

    GEOPHYSICAL OBJECTIVES: The goals of work done this quarter were to (1) refine the maps of seismic-derived porosity for the upper Grayburg for reapplication to the production model, (2) determine rock fabric and porosity patterns for the lower Grayburg and the upper San Andres, (3) relate any seismic-derived porosity characteristics, particularly seismic waveform attributes, to the historical production of oil allocated to lower Grayburg and San Andres zones, and (4) to test other geologic attributes for possible inter-relationships. GEOLOGIC OBJECTIVES: Continue the integrated geological/geophysical effort to develop a usable seismic velocity/log porosity transform for each Grayburg producing interval. The lower Grayburg and San Andres core were revisited to glean lithology and porosity information for the seismic inversion model. Update recent production and injection for each well in the study area. Add new production and injection wells to spreadsheet. Continue evaluation of effectiveness of recent completions, plug backs and injector conversions by monitoring oil production and produced water composition. ENGINEERING OBJECTIVES: To build the most accurate reservoir picture by continued integration of all data types available and utilize that model to optimize oil production. Monitoring and testing of new and worked-over wells continues to test the early production models. Methods to improve water quality are being evaluated using normal field management procedures.

  4. 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

  5. Mercury in San Francisco Bay forage fish

    International Nuclear Information System (INIS)

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

  6. Teaching Geology at San Quentin State Prison

    Science.gov (United States)

    D'Alessio, M. A.; Pehl, J.; Ferrier, K. L.; Pehl, C. W.

    2004-12-01

    The students enrolled in our Geology 215 class are about as on-traditional as it gets. They range in age from about 20 - 50 years old, they are all male, all from under-represented ethnic groups, and they are all serving time in one of the country's most notorious prisons. We teach in a degree-granting community college program inside California's San Quentin State Prison. The program is run entirely by volunteers, and students who participate in educational programs like ours are about 5 times less likely to return to prison than the general inmate population in California. The prison population of California is ethnically diverse, though minorities are present in higher proportion than in the general population. Last semester, our geology class happened to be composed entirely of minorities even though the college program serves the full spectrum of the prison population. While some trends in geoscience education encourage the use of technology in the classroom, security restrictions prevent us from using even some of the simplest visual aids. Faced with these challenges, we have developed an inquiry-based syllabus for an introductory Geology class at the community college level. We find that kinaesthetic learning activities such as urban geologic mapping and acting out plate tectonic motions from ridge to trench (complete with magnetic pole polarity shifts) are not only possible in restricted learning environments, but they promote student learning in unexpected ways.

  7. The radiological accident in San Salvador

    International Nuclear Information System (INIS)

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

  8. 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

  9. General Atomic Laboratories. San Diego - California

    Directory of Open Access Journals (Sweden)

    Luckman, Charles

    1962-07-01

    Full Text Available El edificio está emplazado en un espacioso solar de Torrey Pines Mesa, situado en la parte norte de la ciudad de San Diego (California. Los servicios fundamentales comprenden un bloque administrativo; una gran construcción experimental; dos edificios de forma semicilíndrica, en los que se encuentran los laboratorios particulares y las oficinas correspondientes; y otro edificio, de planta circular, en el que está la biblioteca y que, además, sirve para centro de reuniones, conferencias e información técnica. También existe un edificio en el que se encuentra el acelerador lineal de partículas, otros dos que sirven para la investigación de la fisión nuclear y el salón de reuniones. El complejo de los laboratorios, incluyendo los edificios auxiliares y de servicio, ocupa aproximadamente 24.000 m2 y es uno de los mayores y mejor acondicionados para la investigación nuclear privada del mundo.

  10. 2010 Northern San Francisco Bay Area Lidar: Portions of Alameda, Contra Costa, Marin, Napa, San Francisco, Solano, and Sonoma Counties

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce This Light Detection and Ranging (LiDAR) dataset is a survey of northern San Francisco Bay, California. The project area consists of approximately 437 square miles...

  11. 2010 Northern San Francisco Bay Area Lidar: Portions of Alameda, Contra Costa, Marin, Napa, San Francisco, Solano, and Sonoma Counties

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This Light Detection and Ranging (LiDAR) dataset is a survey of northern San Francisco Bay, California. The project area consists of approximately 437 square miles...

  12. Protection Island and San Juan Islands National Wildlife Refuges: Comprehensive Conservation Plan and San Juan Islands Wilderness Stewardship Plan

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This Comprehensive Conservation Plan CCP was written to guide management on Protection Island and San Juan Islands NWRs for the next 15 years. This plan outlines...

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

    Science.gov (United States)

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

    2015-04-01

    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 μg/g, whereas for the reference site, Chimichagua, Cesar, it was 0.58 μg/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 (I(geo)) 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

  14. Water-balance and groundwater-flow estimation for an arid environment: San Diego region, California

    Directory of Open Access Journals (Sweden)

    L. E. Flint

    2012-03-01

    Full Text Available The coastal-plain aquifer that underlies the San Diego City metropolitan area in southern California is a groundwater resource. The understanding of the region-wide water balance and the recharge of water from the high elevation mountains to the east needs to be improved to quantify the subsurface inflows to the coastal plain in order to develop the groundwater as a long term resource. This study is intended to enhance the conceptual understanding of the water balance and related recharge processes in this arid environment by developing a regional model of the San Diego region and all watersheds adjacent or draining to the coastal plain, including the Tijuana River basin. This model was used to quantify the various components of the water balance, including semi-quantitative estimates of subsurface groundwater flow to the coastal plain. Other approaches relying on independent data were used to test or constrain the scoping estimates of recharge and runoff, including a reconnaissance-level groundwater model of the San Diego River basin, one of three main rivers draining to the coastal plain. Estimates of subsurface flow delivered to the coastal plain from the river basins ranged from 12.3 to 28.8 million m3 yr−1 from the San Diego River basin for the calibration period (1982–2009 to 48.8 million m3 yr−1 from all major river basins for the entire coastal plain for the long-term period 1940–2009. This range of scoping estimates represents the impact of climatic variability and realistically bounds the likely groundwater availability, while falling well within the variable estimates of regional recharge. However, the scarcity of physical and hydrologic data in this region hinders the exercise to narrow the range and reduce the uncertainty.

  15. Evolving Hazard Monitoring and Communication at San Vicente Volcano, El Salvador

    Science.gov (United States)

    Bowman, L. J.; Gierke, J. S.

    2014-12-01

    El Salvador has 20 potentially active volcanoes, four of which have erupted in the last 100 years. Since San Vicente Volcano has had no historic eruptions, monitoring is not a high priority; especially given the current eruptive crisis at San Miguel Volcano. Though probability of eruptive hazards remains low at San Vicente, it is arguably one of the most hazardous volcanoes in the country due to rainfall-induced landslides and debris-flow risk. At least 250 deaths occurred in November 2009 from landslides and debris flows triggered by Hurricane Ida. This disaster caused the Universidad de El Salvador - Facultad Multidisciplinaria Paracentral (UES-FMP, San Vicente, El Salvador) to partner with governmental and nongovernmental organizations (including the U.S. Peace Corps, U.S. Fulbright Program, Korean International Cooperation Agency, Proteccin Civil and the Centro de Proteccin para Desastres (CEPRODE)) to focus its faculty and student research toward hazard monitoring and risk studies. Newly established monitoring efforts include: measurement of surface cracks and localized rainfall by Proteccin Civil and local residents using crude extensometers and rain gauges; installation of six weather stations that operate within the most at-risk municipalities; seismic refraction surveys to better characterize stratigraphy and seasonal water table changes; and most recently, a USAID/NSF-funded initiative partnered with the UES-FMP to monitor seasonal hydrologic conditions related to flooding and groundwater recharge. The information from these initiatives is now used to communicate current conditions and warnings through a network of two-way radios established by CEPRODE and Proteccin Civil. Representatives from the multi-institutional team also communicate the data to authorities who make better-informed decisions regarding warnings and evacuations, as well as determine suitable areas for population relocation in the event of a crisis. Data will eventually be used to model and forecast potential hazard events.

  16. Adaptive Management Methods to Protect the California Sacramento-San Joaquin Delta Water Resource

    Science.gov (United States)

    Bubenheim, David

    2016-01-01

    The California Sacramento-San Joaquin River Delta is the hub for California's water supply, conveying water from Northern to Southern California agriculture and communities while supporting important ecosystem services, agriculture, and communities in the Delta. Changes in climate, long-term drought, water quality changes, and expansion of invasive aquatic plants threatens ecosystems, impedes ecosystem restoration, and is economically, environmentally, and sociologically detrimental to the San Francisco Bay/California Delta complex. NASA Ames Research Center and the USDA-ARS partnered with the State of California and local governments to develop science-based, adaptive-management strategies for the Sacramento-San Joaquin Delta. The project combines science, operations, and economics related to integrated management scenarios for aquatic weeds to help land and waterway managers make science-informed decisions regarding management and outcomes. The team provides a comprehensive understanding of agricultural and urban land use in the Delta and the major water sheds (San Joaquin/Sacramento) supplying the Delta and interaction with drought and climate impacts on the environment, water quality, and weed growth. The team recommends conservation and modified land-use practices and aids local Delta stakeholders in developing management strategies. New remote sensing tools have been developed to enhance ability to assess conditions, inform decision support tools, and monitor management practices. Science gaps in understanding how native and invasive plants respond to altered environmental conditions are being filled and provide critical biological response parameters for Delta-SWAT simulation modeling. Operational agencies such as the California Department of Boating and Waterways provide testing and act as initial adopter of decision support tools. Methods developed by the project can become routine land and water management tools in complex river delta systems.

  17. Provenance and tectonic setting of the protoliths of the Metamorphic Complexes of Sierra de San Luis

    Directory of Open Access Journals (Sweden)

    MG López de Luchi

    2003-12-01

    Full Text Available A major and trace element based characterization of the metasedimentary protoliths of three metamorphic units of Sierra de San Luis (Pringles Metamorphic Complex, San Luis Formation and Conlara Metamorphic Complex is presented. Geochemistry indicates a dominance of shales in the protoliths of San Luis Formation, whereas greywackes and shales made up the Conlara Metamorphic complex and mainly greywackes, the Pringles Metamorphic Complex. Both major element data and trace element ratios (i.e. Th/Sc, Th/U, indicate a source with an average upper crustal composition for the protoliths of the Pringles Metamorphic Complex, the San Luis Formation and the shales of the Conlara Metamorphic complex. A component with less evolved signature may be inferred for the metagreywackes of the Conlara metamorphic Complex. Mixed sourced detritus are indicated for the three units with clastic material resulting mainly from both andesitic and acidic/recycled detritus. The overall data consistently suggest a continental island arc and/or active margin setting as the more probable geodynamic scenario for the deposition of the sedimentary precursors of the studied units. In this context, a back-arc setting can account for the mixed nature of the inferred source areas with uplifted old basement and arc-related detritus as the end members of the mixtures. The inferred back-arc basin would have evolved through the Cambrian receiving the sediments derived from the Pampean Orogen to the east combined with probably some old crust exposures and to the west the source might have been controlled by the active continental margin.

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

    International Nuclear Information System (INIS)

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

  19. Indoor Air Quality Assessment of the San Francisco Federal Building

    Energy Technology Data Exchange (ETDEWEB)

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

    2008-07-01

    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.

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

    Science.gov (United States)

    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

    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.

  1. Observing the San Andreas Fault at Depth

    Science.gov (United States)

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

    2005-12-01

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

  2. Direct linear driving systems; Les entrainements lineaires directs

    Energy Technology Data Exchange (ETDEWEB)

    Favre, E.; Brunner, C.; Piaget, D. [ETEL SA (France)

    1999-11-01

    The linear motor is one of the most important developments in electrical drive technology. However, it only, began to be adopted on a large scale at the beginning of the 1990's and will not be considered a mature technology until well into the next millennium. Actuators based on linear motor technology have a number of technical advantages including high speed, high positional accuracy and fine resolution. They also require fewer component parts. Some precautions are necessary when using linear motors. Care must be taken to avoid overheating and excessive vibration, and the magnetic components must be protected.

  3. Dficit hdrico en San Antonio Oeste, Argentina

    Directory of Open Access Journals (Sweden)

    Gerardo M.E. Perillo

    2010-08-01

    Full Text Available Se calcularon los componentes del balance hdrico en San Antonio Oeste (SAO, Argentina. SAO se localiza en el sector Nororiental de la Patagonia, en una zona semirida de escasa productividad agropecuaria como consecuencia del elevado dficit anual y la insuficiencia del drenaje superficial. El objetivo principal de este trabajo es evaluar el dficit en SAO a partir de metodologas adaptadas a las condiciones de sitio. Para ello se realizaron balances hdricos climticos normales y secuenciales de acuerdo con Thornthwaite y Matter (1955 en base a datos pertenecientes a la estacin SAO del Servicio Meteorolgico Nacional. Se seleccion y calibr el mtodo de estimacin de la evapotranspiracin potencial ms adecuado, mediante una comparacin entre cuatro mtodos empricos y FAO Penman-Monteith. Para la caracterizacin de las condiciones edficas del terreno se realiz un anlisis de textura del suelo y contenido de materia orgnica en tres sitios representativos prximos a la estacin SAO. El mtodo de evapotranspiracin potencial de Christiansen present la mayor correlacin (r2=0,994 cuyo error relativo medio es 1,1 y 24,2 % en verano e invierno, respectivamente. Las interrelaciones entre las variables precipitacin y evapotranspiracin potencial en los balances hdricos normales sealaron volmenes anuales deficitarios en todos los perodos de anlisis (1961-2000 del orden de los 1170 mm. Estos volmenes ocurren principalmente durante los meses de septiembre a marzo, concentrando ms del 80 % del total anual. El perodo que mostr mayor dficit es el 1971-1980 (1258 mm/ao. En contraposicin, en los decenios 1981-1990 y 1991-2000 los valores de dficit fueron moderadamente inferiores (approx. 12 % al citado perodo. Los aportes metodolgicos y resultados obtenidos deben ser considerados en las polticas de planificacin y manejo del riego, mxime en un contexto econmico de creciente diversificacin productiva.

  4. EL CAMINO DEL INCA ENTRE TOCOTA Y VILLA NUEVA (VALLE DE IGLESIA, SAN JUAN / The Inka road between Tocota and Villa Nueva (Iglesia Valley, San Juan

    Directory of Open Access Journals (Sweden)

    Alejandro García

    2011-12-01

    Full Text Available La vialidad estatal incaica en los valles longitudinales de la provincia de San Juan, en el extremo SE del Tawantinsuyu, ha sido objeto de diversas consideraciones durante el último siglo. Sin embargo, no se han realizado estudios específicos destinados a comprobar su existencia, la cual incluso ha sido negada recientemente. A fin de aclarar el tema se realizó el relevamiento de un sector del Valle de Iglesia. En este artículo se presentan los resultados de ese estudio, junto con una revisión y discusión de los antecedentes y de algunas ideas vinculadas con el tema. Fundamentalmente, se verifica la presencia del Qhapaq Ñan en la parte baja del sector analizado, se refuta la propuesta de que el trazado longitudinal principal se habría extendido por la parte alta del sector precordillerano y se sostiene que el tramo relevado fue recorrido por Debenedetti a principios del siglo XX, aunque sin advertir que se trataba del camino incaico.   Palabras clave: Inca; Camino del Inca; Dominación incaica; Collasuyo; San Juan   Abstract The Inka road system in the longitudinal valleys of San Juan province, in the southeastern end of Tawantinsuyu, has been subject of several considerations during the last century. However, no specific studies have been undertaken to verify its existence, which recently has been even denied. To clarify the issue we surveyed a section of Iglesia Valley. This article presents the results of that study, along with a review and discussion of the background and of some ideas related to the topic. Basically, the presence of the Qhapaq Ñan at the bottom of the surveyed sector is verified, and the suggestion that the main inka longitudinal route would have extended over the top of the precordilleran mountain region is refused. Also, it is argued that the analyzed stretch was traveled by Debenedetti in the beginnings of the twentieth century, but without realizing that it was the Inka road.   Keywords: Inka; Inka Road; Inka Domination; Collasuyu; San Juan

  5. Hydrodynamic instabilities in the linear regime: computing linear perturbations; Instabilites hydrodynamiques en regime lineaire: calcul numerique de perturbations lineaires

    Energy Technology Data Exchange (ETDEWEB)

    Clarisse, J.M.; Boudesocque-Dubois, C.; Leidinger, J.P.; Willien, J.L. [CEA Bruyeres-le-Chatel, 91 (France)

    2009-08-15

    A linear perturbation computation method for predicting the linear growth of three-dimensional hydrodynamic instabilities in unsteady compressible flows, with planar or spherical symmetries, is presented. Simple yet demanding configurations of spherically converging flows, taken from gas dynamics, illustrate the method capabilities at yielding predictive results. Examples of more complex flow configurations point out the interest of such an approach in the context of inertial confinement fusion applications. (authors)

  6. Prediction of maximum earthquake intensities for the San Francisco Bay region

    Science.gov (United States)

    Borcherdt, Roger D.; Gibbs, James F.

    1975-01-01

    The intensity data for the California earthquake of April 18, 1906, are strongly dependent on distance from the zone of surface faulting and the geological character of the ground. Considering only those sites (approximately one square city block in size) for which there is good evidence for the degree of ascribed intensity, the empirical relation derived between 1906 intensities and distance perpendicular to the fault for 917 sites underlain by rocks of the Franciscan Formation is: Intensity = 2.69 - 1.90 log (Distance) (km). For sites on other geologic units intensity increments, derived with respect to this empirical relation, correlate strongly with the Average Horizontal Spectral Amplifications (AHSA) determined from 99 three-component recordings of ground motion generated by nuclear explosions in Nevada. The resulting empirical relation is: Intensity Increment = 0.27 +2.70 log (AHSA), and average intensity increments for the various geologic units are -0.29 for granite, 0.19 for Franciscan Formation, 0.64 for the Great Valley Sequence, 0.82 for Santa Clara Formation, 1.34 for alluvium, 2.43 for bay mud. The maximum intensity map predicted from these empirical relations delineates areas in the San Francisco Bay region of potentially high intensity from future earthquakes on either the San Andreas fault or the Hazard fault.

  7. Solar energy system performance evaluation-seasonal report for Elcam San Diego, San Diego, California

    Science.gov (United States)

    1980-01-01

    The solar energy system, Elcam San Diego, was designed to supply domestic hot water heating for a single family residence located in Encinitas, California. System description, performance assessment, operating energy, energy savings, maintenance, and conclusions are presented. The system is a 'Sunspot' two tank cascade type, where solar energy is supplied to either a 66 gallon preheat tank (solar storage) or a 40 gallon domestic hot water tank. Water is pumped directly from one of the two tanks, through the 65 square feet collector array and back into the same tank. Freeze protection is provided by automatically circulating hot water from the hot water tank through the collectors and exposed plumbing when freezing conditions exist. Auxiliary energy is supplied by natural gas. Analysis is based on instrumented system data monitored and collected for one full season of operation.

  8. Holocene Geologic Slip Rate for the Banning Strand of the Southern San Andreas Fault near San Gorgonio Pass, Southern California

    Science.gov (United States)

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

    2014-12-01

    We present the first Holocene geologic slip rate for the Banning strand of the southern San Andreas Fault in southern California. The southern San Andreas Fault splays into the sub-parallel Banning and Mission Creek strands in the northwestern Coachella Valley, and although it has long been surmised that the Banning strand eventually accommodates the majority of displacement and transfers it into San Gorgonio Pass, until now it has been uncertain how slip is actually partitioned between these two fault strands. Our new slip rate measurement, critically located at the northwestern end of the Banning strand, overlaps within errors with the published rate for the southern San Andreas Fault measured at Biskra Palms Oasis. This indicates that the majority of southern San Andreas Fault displacement transfers from the southeastern Mission Creek strand northwest to the Banning strand and into San Gorgonio Pass. Our result corroborates the UCERF3 hazard model, and is consistent with most previous interpretations of how slip is partitioned between the Banning and Mission Creek fault strands. To measure this slip rate, we used B4 airborne LiDAR to identify the apex of an alluvial fan offset laterally 30 ± 5 m from its source. We calculated the depositional age of the fan using 10Be in-situ cosmogenic exposure dating of 5 cobbles and a depth profile. We calculated a most probable fan age of 4.0 +2.0/-1.6 ka (1σ) by combining the inheritance-corrected cobble ages assuming Gaussian uncertainty. However, the probability density function yielded a multi-peaked distribution, which we attribute to variable 10Be inheritance in the cobbles, so we favor the depth profile age of 2.2-3.6 ka. Combined, these measurements yield a late Holocene slip rate for the Banning strand of the southern San Andreas Fault of 11.1 +3.1/-3.3 mm/yr. This slip rate does not preclude possibility that some slip transfers north along the Mission Creek strand and the Garnet Hill fault, but it does confirm that the Banning strand has been the most probable rupture path for earthquakes nucleated on the southern San Andreas Fault over the past few thousand years, and is likely to remain so in the near future. This clarification of slip partitioning within the northwest Coachella Valley is timely given that the southern San Andreas Fault is considered overdue for a large earthquake.

  9. Chondrichthyans of the San Matas Gulf, Patagonia, Argentina / Los condrictios del Golfo San Matas, Patagonia, Argentina

    Scientific Electronic Library Online (English)

    Mara R, PERIER; Maril, ESTALLES; Nidia M, COLLER; Matas N, SUAREZ; Gimena J, MORA; Edgardo E, DI GICOMO.

    2011-12-01

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

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

    Science.gov (United States)

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

    2014-12-01

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

  11. SANS facility at the PITESTI 14MW TRIGA reactor

    International Nuclear Information System (INIS)

    At the present time, an important not yet fully exploited potentiality is represented by the SANS instruments existent at lower power reactors and reactors in developing countries even if they are, generally, endowed with a simpler equipment and are characterized by the lack of infrastructure to maintain and repair high technology accessories. The application of SANS at lower power reactors and in developing countries nevertheless is possible in well selected topics where only a restricted Q range is required, when scattering power is expected to be sufficiently high or when the sample size can be increased at the expense of resolution. The need for the installation of a new SANS facility at the Triga Reactor of the Institute of Nuclear Researches in Pitesti, Romania become actual especially after the shutting down of the VVRS Reactor from Bucharest

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

    OpenAIRE

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

    2013-01-01

    We examined the relation between maternal smoking and adverse infant outcomes [low birth weight (LBW), and preterm birth (PTB)] during 20072008 in San Bernardino County, Californiathe largest county in the contiguous United States which has one of the highest rates of infant mortality in California. Using birth certificate data, we identified 1,430 mothers in 2007 and 1,355 in 2008 who smoked during pregnancy. We assessed the effect of never smoking and smoking cessation during pregnancy re...

  13. Volcano-hazard zonation for San Vicente volcano, El Salvador

    Science.gov (United States)

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

    2001-01-01

    San Vicente volcano, also known as Chichontepec, is one of many volcanoes along the volcanic arc in El Salvador. This composite volcano, located about 50 kilometers east of the capital city San Salvador, has a volume of about 130 cubic kilometers, rises to an altitude of about 2180 meters, and towers above major communities such as San Vicente, Tepetitan, Guadalupe, Zacatecoluca, and Tecoluca. In addition to the larger communities that surround the volcano, several smaller communities and coffee plantations are located on or around the flanks of the volcano, and major transportation routes are located near the lowermost southern and eastern flanks of the volcano. The population density and proximity around San Vicente volcano, as well as the proximity of major transportation routes, increase the risk that even small landslides or eruptions, likely to occur again, can have serious societal consequences. The eruptive history of San Vicente volcano is not well known, and there is no definitive record of historical eruptive activity. The last significant eruption occurred more than 1700 years ago, and perhaps long before permanent human habitation of the area. Nevertheless, this volcano has a very long history of repeated, and sometimes violent, eruptions, and at least once a large section of the volcano collapsed in a massive landslide. The oldest rocks associated with a volcanic center at San Vicente are more than 2 million years old. The volcano is composed of remnants of multiple eruptive centers that have migrated roughly eastward with time. Future eruptions of this volcano will pose substantial risk to surrounding communities.

  14. Produccin de flores en la agricultura urbana de San Jos de las Lajas, Cuba / Flowers production in the urban agriculture of San Jos de las Lajas, Cuba

    Scientific Electronic Library Online (English)

    Ania, Yong Chou; Eduardo, Calves Somoza; Zoilo, Tern Vidal; Antoliano, Ramrez Medina; ngel, Leyva Galn; Mara I, Pavn Rosales.

    2014-09-01

    Full Text Available El creciente aumento en el consumo de flores en el municipio San Jos de las Lajas ha provocado que se incluyan nuevas especies de flores de corte en los sistemas agrcolas, y con ello nuevas tecnologas de manejo. La capacitacin in situ de los agricultores, facilitada por investigadores y por prod [...] uctores con mayor experiencia en este rengln productivo, fue llevada a cabo a travs de talleres participativos y visitas de intercambio. Se consigui incrementar la diversidad en tres especies (clavel chino, rosa y nardo) y se identificaron seis experimentos diseados y conducidos por los productores y relacionados con la introduccin de especies de flores, asociaciones y rotaciones, arreglos espaciales y conservacin de semilla Abstract in english The growing increase in the consumption of flowers in the municipality San Jos 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

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

    Science.gov (United States)

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

    2013-12-01

    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.

  16. First experiences with large SAN storage and Linux

    International Nuclear Information System (INIS)

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

  17. The SANS facility at the Pitesti 14MW TRIGA reactor

    International Nuclear Information System (INIS)

    The SANS facility existing at the Pitesti 14MW TRIGA reactor is presented. The main characteristics and the preliminary evaluation of the installation performances are given. A monochromatic neutron beam with 1.5 A ≤ λ ≤ 5 A is produced by a mechanical velocity selector with helical slots. A fruitful partnership was established between INR Pitesti (Romania) and JINR Dubna (Russia). The first step in this cooperation consists in the manufacturing in Dubna of a battery of gas-filled positional detectors devoted to the SANS instrument

  18. Simulation of virtual SANS spectrometers at IBR-2 reactor

    International Nuclear Information System (INIS)

    The experience gained in the last 15 years of experimental studies of large-scale structures with the SANS instrument at the IBR-2 pulsed reactor in Dubna shows that some parameters of the spectrometer can be improved. In particular, it concerns reduction of the fast neutron and gamma backgrounds that limit the possibilities of studying weakly scattering objects. Another direction of improvement is to reduce a minimum momentum transfer value Qmin to study objects with larger characteristic dimensions. The paper investigates several configurations of the SANS machine at IBR-2. The Monte Carlo codes are used to calculate the parameters of such virtual instruments. An optimal instrument structure is proposed

  19. LOD First Estimates In 7406 SLR San Juan Argentina Station

    Science.gov (United States)

    Pacheco, A.; Podest, R.; Yin, Z.; Adarvez, S.; Liu, W.; Zhao, L.; Alvis Rojas, H.; Actis, E.; Quinteros, J.; Alacoria, J.

    2015-10-01

    In this paper we show results derived from satellite observations at the San Juan SLR station of Felix Aguilar Astronomical Observatory (OAFA). The Satellite Laser Ranging (SLR) telescope was installed in early 2006, in accordance with an international cooperation agreement between the San Juan National University (UNSJ) and the Chinese Academy of Sciences (CAS). The SLR has been in successful operation since 2011 using NAOC SLR software for the data processing. This program was designed to calculate satellite orbits and station coordinates, however it was used in this work for the determination of LOD (Length Of Day) time series and Earth Rotation speed.

  20. Site testing at San Pedro Mártir

    Directory of Open Access Journals (Sweden)

    J. Echeverría

    2003-01-01

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

  1. A SANS study of capillary condensation in porous media

    International Nuclear Information System (INIS)

    The authors use small angle neutron scattering (SANS) to study the microstructure of porous Vycor glass and the capillary condensation of fluids in the medium. Using a chord distribution model, they can predict the structure factor measured by SANS. Excellent agreement with the data is obtained. The fitted parameters characterize quantitatively the porous structure before and during the process of condensation, and are in good agreement with isotherm measurements. However, at the latest stages of the process, when all the pores are nearly filled, the model can no longer describe the system

  2. Water supply and demand scenarios in the San Juan watershed

    OpenAIRE

    José Návar

    2001-01-01

    Mexico is listed among the countries predicted to have freshwater shortages for the year 2020. The drought spell of the 1990’s has reduced fresh water availability in northern Mexico. Conflicts between users, and political entities have appeared in several watersheds. The río San Juan watershead is a classic example where water resources are of paramount importance for sustainable development. We aimed to predict future water supply and demand along the main of the río San Juan, from El Cuchi...

  3. Site testing at San Pedro Mártir

    OpenAIRE

    Echeverría, J. (Javier)

    2003-01-01

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

  4. SANS structural study of a microporous carbonized resole

    Science.gov (United States)

    Steriotis, Th; Beltsios, K.; Mitropoulos, A.; Kanellopoulos, N.; Wiedenmann, A.; Keiderling, U.

    2000-03-01

    A way to generate a microporous carbon structure is to carbonize and optionally activate a high carbon yield polymeric precursor such as a phenol-formaldehyde resole. Carbonized samples are studied by SANS and nitrogen adsorption at 77 K. Porod plots and modified Guinier analysis of various geometries are presented. On the basis of the results obtained from SANS and nitrogen adsorption a carbonized resole model based on 4.0 nm solid structural units and a network of nearly isotropic pores is proposed.

  5. SANS structural study of a microporous carbonized resole

    International Nuclear Information System (INIS)

    Complete text of publication follows. A way to generate a microporous carbon structure is to carbonize and optionally activate a high carbon yield polymeric precursor such as a phenol-formaldehyde resole [1]. Carbonized resole samples are studied by SANS (non-activated) and nitrogen adsorption at 77 K (activated and non-activated samples) [2]. Porod plots and modified Guinier analysis of various potential geometries are presented. On the basis of the results obtained from SANS and nitrogen adsorption a carbonized resole model based on 4.0 nm solid structural units and a network of nearly isotropic pores is proposed. (author)

  6. Final Environmental Statement : Acquisition of lands for the San Francisco Bay National Wildlife Refuge California

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Federal Government proposes to acquire approximately 23,000 acres of land in the South San Francisco Bay region, Alameda, San Mateo and Santa Clara Counties, to...

  7. San Francisco Bay National Wildlife Refuge: Annual Narrative Report: Calendar Year 1987

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior This annual narrative report for San Francisco Bay NWR, San Pablo Bay NWR, Antioch Dunes NWR, Farallon NWR, and Ellicott Slough NWR outlines Refuge accomplishments...

  8. San Francisco Bay National Wildlife Refuge Complex: Annual Narrative Report: Calendar Year 1989

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This annual narrative report for San Francisco Bay NWR, San Pablo Bay NWR, Antioch Dunes NWR, Farallon NWR, Ellicott Slough NWR, and Salinas River NWR outlines...

  9. Don Edwards San Francisco Bay National Wildlife Refuge: Annual Narrative Report: Calendar Year 2000

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This annual narrative report for Don Edwards San Francisco Bay NWR, Antioch Dunes NWR, Farallon NWR, San Pablo Bay NWR, Ellicot Slough NWR, Salinas River NWR, and...

  10. A summary of the San Francisco tidal wetlands restoration series

    Directory of Open Access Journals (Sweden)

    Larry R. Brown

    2003-10-01

    Full Text Available 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 numerous invasive alien species. With regard to organic carbon, a major uncertainty is the net benefit of land use change given uncertainty about the quantity and quality of different forms of organic carbon resulting from different land uses. A major challenge is determining the flux of organic carbon from open systems like tidal wetlands. Converting present land uses to tidal wetlands will almost certainly result in increased methylation of mercury at the local scale with associated accumulation of mercury within local food webs. However, it is unclear if such local accumulation is of concern for fish, wildlife or humans at the local scale or if cumulative effects at the regional scale will emerge. Based on available information it is expected that restored tidal wetlands will remain stable once constructed; however, there is uncertainty associated with the available data regarding the balance of sediment accretion, sea-level rise, and sediment erosion. There is also uncertainty regarding the cumulative effect of many tidal restoration projects on sediment supply. The conclusions of the articles highlight the need to adopt a regional and multidisciplinary approach to tidal wetland restoration in the Estuary. The Science Program of the CALFED effort provides an appropriate venue for addressing these issues.

  11. Meteorologically Driven Simulations of Dengue Epidemics in San Juan, PR.

    Science.gov (United States)

    Morin, Cory W; Monaghan, Andrew J; Hayden, Mary H; Barrera, Roberto; Ernst, Kacey

    2015-08-01

    Meteorological factors influence dengue virus ecology by modulating vector mosquito population dynamics, viral replication, and transmission. Dynamic modeling techniques can be used to examine how interactions among meteorological variables, vectors and the dengue virus influence transmission. We developed a dengue fever simulation model by coupling a dynamic simulation model for Aedes aegypti, the primary mosquito vector for dengue, with a basic epidemiological Susceptible-Exposed-Infectious-Recovered (SEIR) model. Employing a Monte Carlo approach, we simulated dengue transmission during the period of 2010-2013 in San Juan, PR, where dengue fever is endemic. The results of 9600 simulations using varied model parameters were evaluated by statistical comparison (r2) with surveillance data of dengue cases reported to the Centers for Disease Control and Prevention. To identify the most influential parameters associated with dengue virus transmission for each period the top 1% of best-fit model simulations were retained and compared. Using the top simulations, dengue cases were simulated well for 2010 (r2 = 0.90, p = 0.03), 2011 (r2 = 0.83, p = 0.05), and 2012 (r2 = 0.94, p = 0.01); however, simulations were weaker for 2013 (r2 = 0.25, p = 0.25) and the entire four-year period (r2 = 0.44, p = 0.002). Analysis of parameter values from retained simulations revealed that rain dependent container habitats were more prevalent in best-fitting simulations during the wetter 2010 and 2011 years, while human managed (i.e. manually filled) container habitats were more prevalent in best-fitting simulations during the drier 2012 and 2013 years. The simulations further indicate that rainfall strongly modulates the timing of dengue (e.g., epidemics occurred earlier during rainy years) while temperature modulates the annual number of dengue fever cases. Our results suggest that meteorological factors have a time-variable influence on dengue transmission relative to other important environmental and human factors. PMID:26275146

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

    Directory of Open Access Journals (Sweden)

    Pedro Reygadas

    2008-01-01

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

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

    Index Scriptorium Estoniae

    Valvur, Heino

    2006-01-01

    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

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

    Directory of Open Access Journals (Sweden)

    Porfirio Neri Guarneros

    2013-09-01

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

  15. Improving default rates in Ambulatory Therapeutic Feeding Programmes in operations by Mdecins sans Frontires Operational Centre Amsterdam

    OpenAIRE

    van der Velden, E.

    2008-01-01

    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 Mdecins sans Frontires-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. Defa...

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

    OpenAIRE

    Helgesen, Espen

    2008-01-01

    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...

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

    OpenAIRE

    Shishir MATHUR

    2009-01-01

    This study of the City of San Joses 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 fun...

  18. 40 CFR 81.21 - San Francisco Bay Area Intrastate Air Quality Control Region.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 17 2010-07-01 2010-07-01 false San Francisco Bay Area Intrastate Air... Air Quality Control Regions 81.21 San Francisco Bay Area Intrastate Air Quality Control Region. The San Francisco Bay Area Intrastate Air Quality Control Region consists of the territorial...

  19. 33 CFR 334.880 - San Diego Harbor, Calif.; naval restricted area adjacent to Point Loma.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false San Diego Harbor, Calif.; naval....880 San Diego Harbor, Calif.; naval restricted area adjacent to Point Loma. (a) The area. That portion of San Diego Bay southerly of Ballast Point, exclusive of the southwesterly portion of the...

  20. 33 CFR 334.1010 - San Francisco Bay in vicinity of Hunters Point; naval restricted area.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false San Francisco Bay in vicinity of....1010 San Francisco Bay in vicinity of Hunters Point; naval restricted area. (a) The area. Bounded by the shore of the San Francisco Naval Shipyard and the following lines: Beginning at a point on...

  1. 33 CFR 334.860 - San Diego Bay, Calif., Naval Amphibious Base; restricted area.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false San Diego Bay, Calif., Naval..., DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS 334.860 San Diego... Middle San Diego Bay in an area extending from the northern and eastern boundary of the Naval...

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

    International Nuclear Information System (INIS)

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

  3. 25 CFR 162.503 - San Xavier and Salt River Pima-Maricopa Reservations.

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false San Xavier and Salt River Pima-Maricopa Reservations. 162... AND PERMITS Special Requirements for Certain Reservations § 162.503 San Xavier and Salt River Pima... statutory authority for long-term leasing on the San Xavier and Salt River Pima-Maricopa...

  4. Investigating Fault Slip and Rheology Along the San Andreas Fault in the San Juan Bautista Region

    Science.gov (United States)

    Taira, T.; Burgmann, R.; Nadeau, R. M.; Dreger, D. S.

    2012-12-01

    An improved understanding of the connection between seismic behavior and fault-zone rheology at depth is an essential step toward understanding the underlying mechanics of the faulting process. We investigate the seismicity along the northernmost creeping section of the San Andreas fault near San Juan Bautista (SJB), California, by systematically examining spatiotemporal behaviors of the aftershock sequences following the 12 August 1998 Mw 5.1 SJB earthquake. This 1998 SJB earthquake was the largest historic earthquake in the SJB area and was associated with a large slow slip event. Using a waveform cross-correlation approach (Peng and Zhao, 2009, NatureGeo), we have detected previously uncataloged earthquakes (about 500 events), resolving details of the aftershock activity in a zone at a depth of 9 km about 7 km northwest of the 1998 SJB mainshock. This aftershock zone is marked by one of the highest changes in the seismicity rate, exhibiting a delayed peak (about 20 hours after the mainshock) in the rate of aftershocks preceded by a period of very low rate of aftershocks since the mainshock. Subsequently, the rate of aftershocks shows power-law decay with time for about 1 month, and then the aftershock activity approached the pre-earthquake background level. This temporal behavior of the aftershock activity is different from the predicted aftershock decay based on the model of Dieterich (1994, JGR). Instead, our observation is more consistent with the decay rate of aftershocks occurring in the transition zone between locked and stable slip, as simulated numerically by Kaneko and Lapusta (2008, JGR). Our waveform analysis also identifies over 20 repeating microearthquake sequences (or groups of earthquakes with similar waveforms) associated with the 1998 SJB mainshock. The majority of the sequences have events occurring in the first month of the postseismic period. In other words, they reflect short-lived, accelerated repeater recurrences activated by the 1998 SJB mainshock (Templeton et al., 2008, BSSA). This temporal pattern could indicate that these sequences are located at rheological boundaries between stable and unstable sliding in which the coseismic stresses were accumulated, rather than they represent small asperities surrounded by creeping areas. The sequences are localized in the northwest of the 1998 SJB hypocenter. We investigate the source process of the 1998 SJB mainshock using an empirical Green's function (eGf) approach (Dreger, 1994, GRL), finding the northwest directivity of the rupture propagation. We expect larger stress concentrations by the mainshock in the northwest region from the hypocenter in which the number of repeating earthquakes identified were activated, compared with those in southeast region. We evaluate the slip distribution of the 1998 SJB mainshock, by making use of a M 3.1 foreshock as the eGF. Our preliminary result shows the mainshock has a concentrated slip patch with radius on the order of 300-500 m, with peak slip of about 30 cm. The resulting peak stress drop is about 20 MPa. Efforts are ongoing to evaluate a spatial variation in Coulomb stress change based on our fault slip model and to explore the variability of fault frictional property along the San Andreas fault in the SJB region, with the constraints from the spatiotemporal variations of aftershock and repeating earthquake activities.

  5. Population density, biomass, and age-class structure of the invasive clam Corbicula fluminea in rivers of the lower San Joaquin River watershed, California

    Science.gov (United States)

    Brown, L.R.; Thompson, J.K.; Higgins, K.; Lucas, L.V.

    2007-01-01

    Corbicula fluminea is well known as an invasive filter-feeding freshwater bivalve with a variety of effects on ecosystem processes. However. C. fluminea has been relatively unstudied in the rivers of the western United States. In June 2003, we sampled C. fluminea at 16 sites in the San Joaquin River watershed of California, which was invaded by C. fluminea in the 1940s. Corbicula fluminea was common in 2 tributaries to the San Joaquin River, reaching densities of 200 clams??m-2, but was rare in the San Joaquin River. Biomass followed a similar pattern. Clams of the same age were shorter in the San Joaquin River than in the tributaries. Distribution of clams was different in the 2 tributaries, but the causes of the difference are unknown. The low density and biomass of clams in the San Joaquin River was likely due to stressful habitat or to water quality, because food was abundant. The success of C. fluminea invasions and subsequent effects on trophic processes likely depends on multiple factors. As C. fluminea continues to expand its range around the world, questions regarding invasion success and effects on ecosystems will become important in a wide array of environmental settings.

  6. 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.

  7. San Diego Met High School: Personalization as a Foundation

    Science.gov (United States)

    Principal Leadership, 2010

    2010-01-01

    The mission of San Diego Met High School is to prepare students for college and the workforce through active learning, academic rigor, and community involvement in a small school setting. Because personalization is a key component of the school culture, advisories of 20-25 students work with the same teachers for all four years. Advisers, parents,

  8. Geology of Sierra de San Miguel area Rocha department (Uruguay)

    International Nuclear Information System (INIS)

    This paper is part of a regional study about Mesozoic magmatism, tectonics and sedimentation in Uruguay. As a result of the geological studies carried out in Sierra de San Miguel area (Rocha department), lithological descriptions, their stratigraphic relationships and their petrographic characterization are presented

  9. Working Paper for the Revision of San Francisco's Cable Franchise.

    Science.gov (United States)

    San Francisco Public Library, CA. Video Task Force.

    Ideas are presented for the revision of San Francisco's cable franchise. The recommendations in the report are based upon national research of library and urban use of cable communications and are designed to help the city's present and future cable franchises to comply with the regulations of the Federal Communications Commission by March 31,…

  10. Arquitectura de remeseros en San Pedro de Atacama

    Directory of Open Access Journals (Sweden)

    Flora Vilches

    2014-12-01

    Full Text Available El cuerpo de material arquitectnico 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 demostraran que forma parte importante de la identidad atacamea.

  11. SANS Investigation of the Photosynthetic Machinery of Chloroflexus Aurantiacus

    International Nuclear Information System (INIS)

    Green photosynthetic bacteria harvest light and perform photosynthesis in low light environments, and contain specialized antenna complexes to adapt to this condition. In this report, we present studies using small-angle neutron scattering (SANS) to elucidate structural information about the photosynthetic apparatus, including the peripheral light harvesting chlorosome complex, the integral membrane light-harvesting B808-866 complex and the reaction center (RC) in the thermophilic green phototrophic bacterium Chloroflexus aurantiacus. Using contract variation in SANS measurements, our studies suggest that the B808-866 complex is wrapped around the RC in Cfx. aurantiacus, and the overall size and conformation for the B808-866 complex of Cfx. aurantiacus is roughly comparable to the LH1 antenna complex of the purple bacteria. A similar size for the isolated B808-866 complex is also suggested via dynamic light scattering measurements. Alos, a smaller size of the RC of Cfx. aurantiacus that the RC of the purple bacteria is observed. Further, our SANS measurements indicate that the chlorosome is a lipid body with rod-like shape, and that the self-assembly of bacteriochlorophylls, the major component of the chlorosome, is lipid-like. Finally, two populations of chlorosome particles are suggested in our SANS measurements.

  12. The Basic Design Report of the 40M SANS Instrument

    Energy Technology Data Exchange (ETDEWEB)

    Han, Young Soo; Lee, Chang Hee; Hwang, Dong Gil; Kim, Hak Rho [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of); Kim, Tae Hwan; Choi, Sung Min [Korea Advanced Institute of Science and Technology, Daejeon (Korea, Republic of)

    2006-04-15

    The HANARO cold neutron research facility project was launched on July 1, 2003. A state of the art SANS instrument was selected as a top-priority instrument by an instrument selection committee, which consisted of domestic users and HANARO personnel. An instrument development team and an international and domestic instrument advisory team were formulated. The guide and the instrument simulation were performed using Vitess software and the optimum basic design was completed based on the simulation results and the international advisory team reviews. The optimum design of the guide for the 40M SANS instrument was completed and the optimum basic design of the 40M the SANS instrument was also completed based on the Vitess simulation results. The Q range of the instrument will cover from 0.0008 to 1.0 A-1 and the maximum flux at a sample position can reach about 5.5x10 7 n/cm2sec. The simulation results and the basic design product will be used for the detailed design and the construction of the SANS instrument. The simulation results could be applied to the development of the other instrument.

  13. Geologic mapping around Mahoma mining. San Jose mining company

    International Nuclear Information System (INIS)

    This study has as main objective carry out a geological mapping as well as the structural analysis , in 1.5.000 scale in the zone where the gold benefit plant of San Jose mining company is settled (Mahoma Mining). From this study has been marked many drillings.

  14. Characterization of aerosols in the Metropolitan Area of San Jose

    International Nuclear Information System (INIS)

    The objective of the present study, was to elaborate a profile of the contamination by private matter and to characterize the aerosols collected in the Metropolitan Area of San Jose (Costa Rica). For that, a campaign of sampling was carried out in three points of the city of San Jose, differentiated by there degree of activity: Center of San Jose (Central Station of Firemen), San Isidro of Coronado -Canton of Vasquez of Coronado- (Municipality) and Escazu (Municipality). Such campaign was carried out from April 4 to July 4, 1996 (transition summer-winter), and in two periods of time of 8 hours: 8 a.m. to 4 p.m. and of 8 p.m. to 4 a.m. The aerosols were collected utilizing Gent Pm-10 samplers, in filters of polycarbonate of 0,4 ?m and 8 ?m in cascade, with a flow average of 15 L/min., and it determined the composition average of the present aerosols. The concentration of the majority of the anions were obtained by means of ionic chromatography of high resolution, and the main cations by spectrophotometry of atomic absorption with electro thermic atomization. The space-temporary variations of the concentrations were evaluated and their correlation with the meteorologic variable. (S. Grainger)

  15. Restos fsiles de tortugas en San Buenaventura Nealtican, Puebla

    Directory of Open Access Journals (Sweden)

    Jorge Alfredo HERRERA-FLORES

    2009-12-01

    Full Text Available Se describe y comenta material fsil de tortugas, procedente de San Buenaventura Nealtican, Puebla. Segn sus caractersticas morfolgicas es referido al gnero Trachemys, lo que representa el primer registro fsil de este gnero para el estado de Puebla, adems de dar a conocer una nueva localidad con herpetofauna para el Pleistoceno de Puebla.

  16. Building Regional Innovation Capacity: The San Diego Experience.

    Science.gov (United States)

    Walshok, Mary L.; Furtek, Edward; Lee, Carolyn W. B.; Windham, Patrick H.

    2002-01-01

    The transformation of San Diego's economy to a research and high-tech focus had three critical influences: (1) supply of intellectual capital; (2) catalytic business and financial networks; and (3) breadth and depth of advanced skills and knowledge. Clusters of research institutions partnered with technology-focused networks to provide these key

  17. The San Francisco Joint Institutional Transportation Systems Management Program.

    Science.gov (United States)

    Fink, Ira; LaPointe, Robert

    1981-01-01

    Transportation systems management (TSM) programs are discussed, particularly the 1977 program of the University of California, San Francisco, which led to traffic reduction and improved vehicle flow. The city's implementation plan for a similar TSM program for 14 educational institutions and hospitals is described. (MLW)

  18. The Basic Design Report of the 40M SANS Instrument

    International Nuclear Information System (INIS)

    The HANARO cold neutron research facility project was launched on July 1, 2003. A state of the art SANS instrument was selected as a top-priority instrument by an instrument selection committee, which consisted of domestic users and HANARO personnel. An instrument development team and an international and domestic instrument advisory team were formulated. The guide and the instrument simulation were performed using Vitess software and the optimum basic design was completed based on the simulation results and the international advisory team reviews. The optimum design of the guide for the 40M SANS instrument was completed and the optimum basic design of the 40M the SANS instrument was also completed based on the Vitess simulation results. The Q range of the instrument will cover from 0.0008 to 1.0 A-1 and the maximum flux at a sample position can reach about 5.5x10 7 n/cm2sec. The simulation results and the basic design product will be used for the detailed design and the construction of the SANS instrument. The simulation results could be applied to the development of the other instrument

  19. SANS Investigation of the Photosynthetic Machinery of Chloroflexus Aurantiacus

    Energy Technology Data Exchange (ETDEWEB)

    Tang, Kuo-Hsiang [ORNL; Urban, Volker S [ORNL; Jianzhong, Wen [Washington University, St. Louis; Yueyong, Xin [Washington University, St. Louis; Blankenship, Robert E [ORNL

    2010-01-01

    Green photosynthetic bacteria harvest light and perform photosynthesis in low light environments, and contain specialized antenna complexes to adapt to this condition. In this report, we present studies using small-angle neutron scattering (SANS) to elucidate structural information about the photosynthetic apparatus, including the peripheral light harvesting chlorosome complex, the integral membrane light-harvesting B808-866 complex and the reaction center (RC) in the thermophilic green phototrophic bacterium Chloroflexus aurantiacus. Using contract variation in SANS measurments, our studies suggest that the B808-866 comples is wrapped around the RC in Cfx. aurantiacus, and the overall size and conformation for the B808-866 complex of Cfx. aurantiacus is roughly comparable to the LH1 antenna complex of the purple bacteria. A similar size for the isolated B808-866 complex is also suggested via dynamic light scattering measurements. Alos, a smaller size of the RC of Cfx. aurantiacus that the RC of the purple bacteria is observed. Further, our SANS measurements indicate that the chlorosome is a lipid body with rod-like shape, and that the self-assembly of bacteriochlorophylls, the major component of the chlorosome, is lipid-like. Finally, two populations of chlorosome particles are suggested in our SANS measurements.

  20. Cristianismo y neoplatonismo en San Agustn: la crtica heideggeriana

    Scientific Electronic Library Online (English)

    Silvana, Filippi.

    2010-05-01

    Full Text Available As como en San Pablo, Heidegger cree encontrar en San Agustn la expresin de la existencia humana como acontecida histricamente y de la historia como advenir no objetivable ni disponible. Esta facticidad radical del yo se muestra como propia de la experiencia protocristiana que surge con nitidez [...] vigorosa en las Confesiones de San Agustn y particularmente en su libro X. Dos aspectos son centrales en la lectura heideggeriana de las Confesiones: una fenomenologa del yo y la comprensin del Dasein como tiempo. Pero la dramtica finitud del existir reconoce en San Agustn un horizonte metafsico teolgico que la trasciende y sostiene, mientras en la reflexin heideggeriana la temporalidad de la existencia humana tiende a cerrarse sobre sus propios lmites. Abstract in english Heidegger believes to find in St. Augustine, as in the case of Paul, the expression of human existence as a historic fact, and of history as non objectively or available fate. This radical facticity of self belongs to the Christian earliest form of experience that appears with strong clearness in St [...] . Augustine's Confessions, particularly in Book X. There are two relevant aspects that stand out in the Heideggerian reading of Confessions: for one, the phenomenology of self, and secondly, the understanding of Dasein as time. However, in St. Augustine, the dramatic finitude of existence is metaphysically and theologically transcended and grounded; while in Heidegger's reflection, the finitude of human existence tends to close itself on its own limits.

  1. County of San Diego Master Plan for Refugee Resettlement.

    Science.gov (United States)

    King, Donald R.

    This master plan, devised by San Diego County, has as its objective the total integration of all refugees into the mainstream of community life. The plan begins with background material that describes its goals and the refugee population to be served. In the second section, the county's current program is outlined and the administrative…

  2. San Sebastiani festivali varjutasid hiljutised terroriaktid / Aare Ermel

    Index Scriptorium Estoniae

    Ermel, Aare, 1957-2013

    2001-01-01

    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

  3. The analysis of multiple scattering in SANS and USANS measurements

    International Nuclear Information System (INIS)

    Full text: Small-angle neutron scattering (SANS) and ultra-small-angle neutron scattering (USANS) are widely used to investigate the micro- and nano-structure of condensed matter. However, measurements on materials such as cements, clays etc. are often affected by multiple scattering. If a substantial number of neutrons experience more than one scattering event within a sample, the result is broadening of the angular distribution profile. Often samples cannot be made thin enough to guarantee single scattering and even in cases where it is possible to make thin samples, surface effects can sometimes lead to results that are not representative of the bulk material. In addition, for many SANS measurements there is no reliable method for determining whether or not a sample is thin enough to produce mainly single scattering. Even SANS measurements from samples with different thicknesses may not reveal the presence or otherwise of multiple scattering. We will show that the problems presented by multiple scattering can often be overcome by using USANS measurements. USANS data from different thickness samples often allow us to quantify the effects from multiple scattering. Rather than trying to eliminate multiple scattering from SANS and USANS experiments, it is more advantageous to use multiple scattering to extract information from these measurements that would otherwise be impossible, or at least more difficult, to obtain

  4. Design of 40M SANS instrument at HANARO, Korea

    Science.gov (United States)

    Han, Young-Soo; Choi, Sung-Min; Kim, Tae-Hwan; Lee, Chang-Hee; Kim, Hark-Rho

    2006-11-01

    The HANARO cold-neutron research facility project was launched on July 1, 2003. A state of the art SANS instrument was selected as a top-priority instrument by an instrument selection committee, which consisted of domestic users and HANARO personnel. An instrument development team and an international and domestic instrument advisory team were formulated. At the end position of the CG1B guide, 40M SANS will be installed in the cold-neutron guide hall. The guide and the instrument simulation were performed using Vitess software and the optimum conceptual design was completed based on the simulation results and the international advisory team reviews. The 100×100 cm 2 area detector will be installed and the sample-to-detector distance will vary from 1 to 20 m. The refractive focusing optics and the transmission polarizer/spin flipper setup is planned for installation. The Q range of the 40M SANS instrument will cover from 0.0008 to 1.0 Å -1 when considering the refractive focusing optics. In this paper, the simulation results and the design of the new 40M SANS instrument are presented.

  5. Design of 40M SANS instrument at HANARO, Korea

    International Nuclear Information System (INIS)

    The HANARO cold-neutron research facility project was launched on July 1, 2003. A state of the art SANS instrument was selected as a top-priority instrument by an instrument selection committee, which consisted of domestic users and HANARO personnel. An instrument development team and an international and domestic instrument advisory team were formulated. At the end position of the CG1B guide, 40M SANS will be installed in the cold-neutron guide hall. The guide and the instrument simulation were performed using Vitess software and the optimum conceptual design was completed based on the simulation results and the international advisory team reviews. The 100x100 cm2 area detector will be installed and the sample-to-detector distance will vary from 1 to 20 m. The refractive focusing optics and the transmission polarizer/spin flipper setup is planned for installation. The Q range of the 40M SANS instrument will cover from 0.0008 to 1.0 A-1 when considering the refractive focusing optics. In this paper, the simulation results and the design of the new 40M SANS instrument are presented

  6. A Water Quality Study: Heron's Head Park, San Francisco, California

    Science.gov (United States)

    Li, A.; Wu, K.; Neiss, J.

    2007-12-01

    Heron's Head Park, formerly known as Pier 98, is a 24-acre restored wetland, owned and operated by the Port of San Francisco and situated at the base of the Hunter's Point Power Plant. Heron's Head is a unique environment that is built on landfill and is now a thriving marsh maintained primarily by youth and community volunteers. Adjacent to the park stands a PG&E power plant (closed May 2006), a county waste transfer station, and a combined sewer overflow (CSO) pipe. The park is bordered by San Francisco Bay on the north, east and south sides of the park. We examined the levels of ammonia, nitrite, nitrate, phosphate and fecal coliform at nine sites around the park. Utilizing historical data from other San Francisco Bay sites and other similar estuarine settings in California, we assessed the health of the Bay waters surrounding the park. We found the levels of ammonia, nitrate, nitrite and phosphates to be within the parameters of historical San Francisco Bay data and similar to settings such as Elkhorn Slough, Tomales Bay and Tijuana Estuary. In our study we did find a potential hazard to human health. Fecal coliform concentrations in waters that border the park range from 340 MPN/100 mL - 24,000 MPN/100 mL. This level significantly exceeds Environmental Protection Agency recommendations of 300 MPN/100 mL for human contact with water.

  7. County of San Diego Master Plan for Refugee Resettlement.

    Science.gov (United States)

    King, Donald R.

    This master plan, devised by San Diego County, has as its objective the total integration of all refugees into the mainstream of community life. The plan begins with background material that describes its goals and the refugee population to be served. In the second section, the county's current program is outlined and the administrative

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

    Directory of Open Access Journals (Sweden)

    D. R. Gentner

    2013-10-01

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

  9. The green areas of San Juan, Puerto Rico

    Directory of Open Access Journals (Sweden)

    Olga M. Ramos-González

    2014-09-01

    Full Text Available Green areas, also known as green infrastructure or urban vegetation, are vital to urbanites for their critical roles in mitigating urban heat island effects and climate change and for their provision of multiple ecosystem services and aesthetics. Here, I provide a high spatial resolution snapshot of the green cover distribution of the city of San Juan, Puerto Rico, by incorporating the use of morphological spatial pattern analysis (MSPA as a tool to describe the spatial pattern and connectivity of the city’s urban green areas. Analysis of a previously developed IKONOS 4-m spatial resolution classification of the city of San Juan from 2002 revealed a larger area of vegetation (green areas or green infrastructure than previously estimated by moderate spatial resolution imagery. The city as a whole had approximately 42% green cover and 55% impervious surfaces. Although the city appeared greener in its southern upland sector compared to the northern coastal section, where most built-up urban areas occurred (66% impervious surfaces, northern San Juan had 677 ha more green area cover dispersed across the city than the southern component. MSPA revealed that most forest cover occurred as edges and cores, and green areas were most commonly forest cores, with larger predominance in the southern sector of the municipality. In dense, built-up, urban land, most of the green areas occurred in private yards as islets. When compared to other cities across the United States, San Juan was most similar in green cover features to Boston, Massachusetts, and Miami, Florida. Per capita green space for San Juan (122.2 m²/inhabitant was also comparable to these two U.S. cities. This study explores the intra-urban vegetation variation in the city of San Juan, which is generally overlooked by moderate spatial resolution classifications in Puerto Rico. It serves as a starting point for green infrastructure mapping and landscape pattern analysis of the urban green spaces within the city of San Juan. The effectiveness of research and city planning will be further enhanced as a result of this type of finer-scale urban cover exploration.

  10. An integrated study of the Grayburg/San Andres Reservoir, Foster and South Cowden Fields, Ector County, Texas. Quarterly report, third quarter 1997

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-12-31

    The goals of work done this quarter were to (1) refine the maps of seismic-derived porosity for the upper Grayburg for reapplication to the production model, (2) determine rock fabric and porosity patterns for the lower Grayburg and the upper San Andres, (3) relate any seismic-derived porosity characteristics, particularly seismic waveform attributes, to the historical production of oil allocated to lower Grayburg and San Andres zones, and (4) to test other geologic attributes for possible inter-relationships. Progress on these goals is described. Additional studies were carried out in the following: Upper Grayburg porosity mapping, pipeline fracturing, reservoir simulation, reservoir engineering, and water quality for injection.

  11. 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

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

    International Nuclear Information System (INIS)

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

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

    International Nuclear Information System (INIS)

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

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

    International Nuclear Information System (INIS)

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

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

    Directory of Open Access Journals (Sweden)

    Marcello Tarì

    2005-01-01

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

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

    Science.gov (United States)

    Cloern, J.E.; Cheng, R.T.

    1981-01-01

    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 (<2 m) water and slow circulation. Algal growth rates are governed by solar irradiation, temperature and salinity, while population losses are assumed to result from grazing bycalanoid copepods. Consequences of estuarine gravitational circulation are approximated simply by reducing convective-dispersive transport in that section of the channel (null zone) where residual bottom currents are near zero, and lateral mixing is treated as a bulkexchange process between the channel and the shoals. Model output is consistent with the hypothesis that, because planktonic algae are light-limited, shallow areas are the sites of active population growth. Seasonal variation in the location of the null zone (a response to variable river discharge) is responsible for maintaining the spring bloom of neritic diatoms in the seaward reaches of the estuary (San 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. ?? 1981 Academic Press Inc. (London) Ltd.

  17. Lenguaje, belleza y verdad en Cicern y San Agustn: las encrucijadas de la persuasin

    Directory of Open Access Journals (Sweden)

    Andrs Covarrubias C.

    2002-01-01

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

  18. Correlation between deep fluids, tremor and creep along the central San Andreas fault

    Science.gov (United States)

    Becken, M.; Ritter, O.; Bedrosian, P.A.; Weckmann, U.

    2011-01-01

    The seismicity pattern along the San Andreas fault near Parkfield and Cholame, California, varies distinctly over a length of only fifty kilometres. Within the brittle crust, the presence of frictionally weak minerals, fault-weakening high fluid pressures and chemical weakening are considered possible causes of an anomalously weak fault northwest of Parkfield. Non-volcanic tremor from lower-crustal and upper-mantle depths is most pronounced about thirty kilometres southeast of Parkfield and is thought to be associated with high pore-fluid pressures at depth. Here we present geophysical evidence of fluids migrating into the creeping section of the San Andreas fault that seem to originate in the region of the uppermost mantle that also stimulates tremor, and evidence that along-strike variations in tremor activity and amplitude are related to strength variations in the lower crust and upper mantle. Interconnected fluids can explain a deep zone of anomalously low electrical resistivity that has been imaged by magnetotelluric data southwest of the Parkfield-Cholame segment. Near Cholame, where fluids seem to be trapped below a high-resistivity cap, tremor concentrates adjacent to the inferred fluids within a mechanically strong zone of high resistivity. By contrast, subvertical zones of low resistivity breach the entire crust near the drill hole of the San Andreas Fault Observatory at Depth, northwest of Parkfield, and imply pathways for deep fluids into the eastern fault block, coincident with a mechanically weak crust and the lower tremor amplitudes in the lower crust. Fluid influx to the fault system is consistent with hypotheses of fault-weakening high fluid pressures in the brittle crust. ?? 2011 Macmillan Publishers Limited. All rights reserved.

  19. Management of quarry water and solid wastes from the San Rafael Mining and Manufacturing Complex

    International Nuclear Information System (INIS)

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

  20. El loess de La Pamoa norte en el bloque de San Guillermo The loess of North Pampa in the San Guillermo Elevated Block

    Directory of Open Access Journals (Sweden)

    Daniela M Kröhling

    2003-12-01

    Full Text Available El bloque de San Guillermo forma una superficie elevada de 17.800 km² en el oeste de la provincia de Santa Fe y el borde noreste de la provincia de Córdoba. Debido a su posición topográfica, durante el Cuaternario estuvo sujeto a sedimentación eólica, sin influencia de sedimentación o erosión fluvial, algo atípico en la Pampa Norte. Está limitado por fallas con rechazos del orden de los 30 metros, y tiene una definida identidad estratigráfica, sedimentológica y geomorfológica que lo diferencia de las áreas vecinas. Una perforación de estudio hasta 102 m de profundidad realizada en la localidad de San Guillermo (en un punto típico del mismo atravesó 53 metros de loess primario y una unidad limo arcillosa de edad probablemente pleistocena, sedimentados en discordancia sobre la Fm Paraná (arenas y pelitas miocenas. El paquete loéssico está representado por tres formaciones, cuya mineralogía está dominada en forma casi excluyente por tres formas de cuarzo: policristalino, en microaglomerados y monocristalino. El mineral arcilloso dominante es la illita. La fuente de origen de dichos materiales es probablemente un loess antiguo situado al sur. El tamaño de grano dominante es el limo, que representa el 65 % del total. La perforación se realizó con un sistema ad hoc que combina perforación rotativa directa con muestreo por percusión tipo SPT, lo que permitió obtener 15 muestras inalteradas y 91 muestras comunes, aptas también para análisis. Un estudio regional utilizando descripciones de más de 100 pozos anteriores existentes en la región del centro de Santa Fe y este de Córdoba, cubriendo unos 50.000 km², permitió determinar que en el bloque de San Guillermo la columna estratigráfica se mantiene constante y que varía fuera de sus límites por procesos de erosión y sedimentación fluvial.An investigation on the regional distribution of loess in the North Pampa resulted in the identification of the San Guillermo Elevated Block. The pivotal work of the project was the drilling of a research borehole at the town of San Guillermo (30°15´ lat.S and 61°50´ long.W, North Pampa. This work is part of the "FLAGS Project" founded by the National Agency of Science Promotion, Argentina. The borehole (101.50 m depth comprises the entire Quaternary column of the region and part of Tertiary sedimentary rocks. A total of 91 sediment samples were collected continuously at 1 m depth intervals. 15 oriented undisturbed tube cores were recovered at intervals of 6 m. Also geoelectric and gamma profiles were made. The borehole revealed 54 m of loess which begins at the surface. A Quaternary paludal unit (between 54 and 60.3 m deep separates the loess column from a Miocene littoral sedimentary unit (Paraná Formation. The Quaternary section is composed of three primary (not reworked loess units, and an underlying clayey silt. The upper loess unit is the well known Tezanos Pinto Formation (OIS 2. The other two loessic units are composed of dominant silt (average textural composition: 65% silt, with subordinated clay and scarce fine sand; the segregations of CaCO3 are abundant. Colour varies from 7,5 YR 6/3 (light brown to 7,5 YR 7/3 (pink. The mineralogic composition of the very fine sand fraction is dominated by three forms of quartz: polycrystalline, forming microagglomerates and monocrystalline quartz. X-ray diffractions of total samples indicate a dominance of quartz, with scarce feldspars and illite. The source of the loessic units is probably an old loess located at the south. Such a thick aeolian profile of the borehole provides detailed information on the Pampean Eolian System (PES, mainly considering that outcropping loess-paleosols sequences from North Pampa hardly reach 10 m. The section is representative of a relatively elevated flat area with a surface of 17,800 km² covering the NW of Santa Fe Province and the NE belt of Córdoba Province. That area is limited by fractures and has a marked stratigraphic, sedimentological and geomorphological identity, different to the surrounding region. It is identified here as the San Guillermo Elevated Block, which during the Quaternary underwent only eolian influence, in contrast to the rest of the North Pampa, which was subject mainly to fluvial and alluvial influence of currents arriving from the west and the north. According to the complementary information obtained from more than 100 previous boreholes covering an area of 50,000 km², the stratigraphic column of the San Guillermo Elevated Block is clearly different to the stratigraphic column of the area located to the east. The stratigraphic correlation evidences that the San Guillermo Block is the western limit of the Pliocene- Lower Pleistocene Ituzaingó Fm deposited by the Paraná River.

  1. Seroprevalencia de sfilis en mujeres embarazadas en San Luis Potos Seroprevalence of syphilis in pregnant women in San Luis Potos

    Directory of Open Access Journals (Sweden)

    Daniel E Noyola

    2006-04-01

    Full Text Available OBJETIVO: Determinar la seroprevalencia de sfilis en mujeres embarazadas. MATERIAL Y MTODOS: Encuesta seroepidemiolgica en 1 857 mujeres que acudieron para la atencin del parto a un hospital general de la ciudad de San Luis Potos. RESULTADOS: Se diagnostic sfilis en cinco (0.27% mujeres al momento del parto. Los factores maternos asociados con una probabilidad superior de presentar sfilis incluyeron mayor edad materna, mayor nmero de embarazos previos y vivir en unin libre con su pareja. CONCLUSIONES: El nmero de recin nacidos expuestos a sfilis durante el embarazo, en la ciudad de San Luis Potos, est subestimado. Los resultados de este estudio sustentan la necesidad de identificar, al momento del parto, a madres infectadas con sfilis.OBJECTIVE: To determine the seroprevalence of syphilis in pregnant women. METHODS: A seroepidemiologic survey was conducted in 1 857 women giving birth at a general hospital in the city of San Luis Potosi, Mexico. RESULTS: Five women (0.27 % were diagnosed with syphilis at the time of delivery. Maternal factors associated with a greater likelihood of syphilis included older age, a higher number of pregnancies and living out of wedlock. CONCLUSIONS: The number of new borns exposed to syphilis during pregnancy in San Luis Potosi is underestimated. The results of this study support the need to identify syphilis in infected mothers at the time of delivery.

  2. 77 FR 59643 - Notice of Intent To Repatriate Cultural Items: San Francisco State University NAGPRA Program, San...

    Science.gov (United States)

    2012-09-28

    ..., institution, or Federal agency that has control of the Native American cultural items. The National Park... National Park Service Notice of Intent To Repatriate Cultural Items: San Francisco State University NAGPRA... that the cultural items meet the definition of unassociated funerary objects, sacred objects,...

  3. 2010, San Juan County, NM, Linear Hydrography

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  4. San Juan County 2010 Census Roads

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  5. San Miguel County 2010 Census Tracts

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  6. San Miguel County 2010 Census Blocks

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  7. San Juan County 2010 Census Blocks

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  8. San Juan County 2010 Census Block Groups

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  9. San Miguel County 2010 Census Roads

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  10. San Miguel County 2010 Census Block Groups

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  11. San Juan County Current Point Landmarks

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  12. San Miguel County Current Point Landmarks

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  13. San Juan County Current Area Landmark

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  14. San Miguel County Current Area Landmark

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  15. San Juan County 2010 Census Tracts

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census...

  16. Provision of utility support services to the US Department of Energy San Francisco Operations Office. Final technical report

    Energy Technology Data Exchange (ETDEWEB)

    1994-04-01

    The main purpose of this project was to provide to DOE/SAN continuing, follow-up support to realize savings from a number of alternate supply arrangements that had already been and/or were expected to be identified under the original project. This expected continuation of these efforts is demonstrated by certain of the tasks that are spelled out in the Statement of Work. For example: Evaluate and propose alternative options and methods for improving efficiency, reducing cost, and making effective use of the energy supplies and facilities under various conditions of use; Provide engineering and economic analysis and recommendations for utility-related facilities and service issues, such as high voltage discounts, ownership of facilities, etc.; Assist in developing strategy and documentation in support of negotiating utility contracts and modifications thereto. In addition, the follow-on contract provided for monitoring and intervening in rate cases that had particular relevance to the DOE/SAN laboratories.

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

    Directory of Open Access Journals (Sweden)

    Massimo Palme

    2014-05-01

    Full Text Available Earth, wood and others traditional materials are still used in house constructions in many regions of the world, especially in the Andes. San Pedro de Atacama, for example, is a small town where earth blocks (adobes and rammed earth (tapial are important ways to construct, an art passed on through generations. Energy properties of earth are very interesting: thermal conductivity is low; heat storage capacity is high; color is variable and can be used to absorb or to reject solar radiation. However, nowadays the government social dwelling service is proposing a different type of construction, which does not maintain any relation with the tradition. This paper presents simulation studies and monitoring of four different San Pedro houses, constructed by using different techniques and materials. Results can be used to discuss the thermal performance needed in desert climate and the reliability of social dwelling service houses, under construction at this time in the town.

  18. Constraining deformation at the lithosphere-asthenosphere boundary beneath the San Andreas fault with Sp phases

    Science.gov (United States)

    Fischer, K. M.; Ford, H. A.; Lekic, V.

    2013-12-01

    The geometry of deformation in the deep mantle lithosphere beneath strike-slip plate boundaries has been enigmatic, with models ranging from localized shear zones that are deep extensions of individual crustal faults to broad zones of diffuse, distributed shear with widths of hundreds of kilometers. Using seismic phases that convert from shear to compressional motion (Sp) at the base of the lithosphere beneath California, we find evidence for strike-slip deformation in the deepest mantle lithosphere beneath the central San Andreas fault that occurs over a horizontal width of 50 km or less. This study is based on over 135,000 Sp receiver functions from 730 seismic stations, including the Northern and Southern California Seismic Networks and the NSF EarthScope Transportable and Flexible Arrays. Individual Sp receiver functions were calculated using an extended-time multi-taper method and were migrated and stacked according to their three-dimensional conversion point locations using a model for crust (Lowry and Prez-Gussiny, 2011) and mantle (Obrebski et al., 2010 and 2011) velocity structure beneath each station and a spline-function representation of the Sp Fresnel zone. Sp conversion points at lithosphere-asthenosphere boundary depths are very dense on both sides of the San Andreas fault, and we interpreted the Sp common conversion point stack only at those nodes with information from more than 300 receiver functions. To the east of the plate boundary, a strong coherent Sp phase, indicative of a decrease in shear-wave velocity with depth, is present in the depth range where tomographic studies image the transition from high velocity lithosphere to low velocity asthenosphere. This phase, interpreted as the seismological lithosphere-asthenosphere boundary, has systematically lower amplitudes on the western side of the plate boundary, indicating that the drop in shear velocity from lithosphere to asthenosphere is either smaller or is distributed over a larger depth range. In central and northern California, the change in lithosphere-asthenosphere boundary velocity gradient occurs over a horizontal length scale of less than 50 km and lies directly beneath the San Andreas fault along its simple, central segment, and beneath the Calaveras and Bartlett Springs faults further to the north. Given the absolute velocities of the North American and Pacific plates and low viscosities inferred for the asthenosphere, these results are best explained by the juxtaposition of mantle lithospheres with different properties across these faults. The spatial correlation between the central San Andreas fault and the laterally abrupt change in the velocity structure of the deepest mantle lithosphere points to the accommodation of relative plate motion on a narrow shear zone (< 50 km in width) that extends throughout the entire thickness of the lithosphere.

  19. Aseismic Slip Events along the Southern San Andreas Fault System Captured by Radar Interferometry

    Energy Technology Data Exchange (ETDEWEB)

    Vincent, P

    2001-10-01

    A seismic slip is observed along several faults in the Salton Sea and southernmost Landers rupture zone regions using interferometric synthetic aperture radar (InSAR) data spanning different time periods between 1992 and 1997. In the southernmost Landers rupture zone, projecting south from the Pinto Mountain Fault, sharp discontinuities in the interferometric phase are observed along the sub-parallel Burnt Mountain and Eureka Peak Faults beginning three months after the Landers earthquake and is interpreted to be post-Landers after-slip. Abrupt phase offsets are also seen along the two southernmost contiguous 11 km Durmid Hill and North Shore segments of the San Andreas Fault with an abrupt termination of slip near the northern end of the North Shore Segment. A sharp phase offset is seen across 20 km of the 30 km-long Superstition Hills Fault before phase decorrelation in the Imperial Valley along the southern 10 km of the fault prevents coherent imaging by InSAR. A time series of deformation interferograms suggest most of this slip occurred between 1993 and 1995 and none of it occurred between 1992 and 1993. A phase offset is also seen along a 5 km central segment of the Coyote Creek fault that forms a wedge with an adjoining northeast-southwest trending conjugate fault. Most of the slip observed on the southern San Andreas and Superstition Hills Faults occurred between 1993 and 1995--no slip is observed in the 92-93 interferograms. These slip events, especially the Burnt Mountain and Eureka Peak events, are inferred to be related to stress redistribution from the June, 1992 M{sub w} = 7.3 Landers earthquake. Best-fit elastic models of the San Andreas and Superstition Hills slip events suggest source mechanisms with seismic moments over three orders of magnitude larger than a maximum possible summation of seismic moments from all seismicity along each fault segment during the entire 4.8-year time interval spanned by the InSAR data. Aseismic moment releases of this magnitude (equivalent to M{sub w} = 5.3 and 5.6 events on the Superstition Hills and San Andreas Faults respectively) are hitherto unknown and have not been captured previously by any geodetic technique.

  20. Earthquakes and Volcanic Processes at San Miguel Volcano, El Salvador, Determined from a Small, Temporary Seismic Network

    Science.gov (United States)

    Hernandez, S.; Schiek, C. G.; Zeiler, C. P.; Velasco, A. A.; Hurtado, J. M.

    2008-12-01

    The San Miguel volcano lies within the Central American volcanic chain in eastern El Salvador. The volcano has experienced at least 29 eruptions with Volcano Explosivity Index (VEI) of 2. Since 1970, however, eruptions have decreased in intensity to an average of VEI 1, with the most recent eruption occurring in 2002. Eruptions at San Miguel volcano consist mostly of central vent and phreatic eruptions. A critical challenge related to the explosive nature of this volcano is to understand the relationships between precursory surface deformation, earthquake activity, and volcanic activity. In this project, we seek to determine sub-surface structures within and near the volcano, relate the local deformation to these structures, and better understand the hazard that the volcano presents in the region. To accomplish these goals, we deployed a six station, broadband seismic network around San Miguel volcano in collaboration with researchers from Servicio Nacional de Estudios Territoriales (SNET). This network operated continuously from 23 March 2007 to 15 January 2008 and had a high data recovery rate. The data were processed to determine earthquake locations, magnitudes, and, for some of the larger events, focal mechanisms. We obtained high precision locations using a double-difference approach and identified at least 25 events near the volcano. Ongoing analysis will seek to identify earthquake types (e.g., long period, tectonic, and hybrid events) that occurred in the vicinity of San Miguel volcano. These results will be combined with radar interferometric measurements of surface deformation in order to determine the relationship between surface and subsurface processes at the volcano.