Science.gov

Sample records for amar matrimonio normas

  1. Dr. F. Amar Chy 475 Spring 2009

    E-print Network

    Amar, François G.

    Dr. F. Amar Chy 475 Spring 2009 Hermitian operators Physical observables are represented: ! f " (x #$ +$ % ) ^Ag(x)dx ! g(x "# +# $ ) ^A% f % (x)dx, (4) is a Hermitian operator. So we've shown, will the eigenvalues of ! ^A be real? Proof: Suppose that we apply eqn 4 in the situation where f and g are the same

  2. Dr. F. Amar Chy 475 Spring 2013

    E-print Network

    Amar, François G.

    Dr. F. Amar Chy 475 Spring 2013 Hermitian operators Physical observables are represented which leads to: = (3) An operator, ^A , that satisfies eqn. 3, or more generally, eqn. 4: f (x - + ) ^Ag(x)dx g(x - + ) ^A f (x)dx, (4) is a Hermitian operator. So we've shown that real eigenvalues

  3. Maria Adelaide Amaral ou a Crise da Classe Mdia Brasileira

    E-print Network

    Ravetti, Graciela; Rojo, Sara

    1996-10-01

    Adelaide Amaral ou a Crise da Classe Mdia Brasileira Graciela Ravetti e Sara Rojo INTRODUO l. A famlia Quando entramos em contato com a produo dramtica da escritora brasileira Maria Adelaide Amaral, mergulhamos no mundo privado da classe mdia... limite do privado, romper com a imagem do amor cor de rosa ou dos anncios publicitrios que se valem da famlia feliz para vender carros. A obra entra nas lutas internas do poder, nas pequenas ou grandes maldades, nas pessoas asfixiadas pela represso...

  4. ELIZABETH H. AMARAL and H. ARNOLD CARR Experimental Fishing for Squid

    E-print Network

    ELIZABETH H. AMARAL and H. ARNOLD CARR Experimental Fishing for Squid With Lights in Nantucket Sound Nantucket Sound squid survey areas. Elizabeth H. Amaral and H. Arnold Carr consecutive years and has caught squid in them each year. He first be- came interested in this type of project

  5. Wake Up, It Is 2013! Commentary on Luiz Amaral and Tom Roeper's Article

    ERIC Educational Resources Information Center

    Muysken, Pieter

    2014-01-01

    This article examines the Multiple Grammars (MG) theory proposed by Luiz Amaral and Tom Roeper in the present issue and presents a critique of the research that went into the theory. Topics discussed include the allegation that the bilinguals and second language learners in the original article are primarily students in an academic setting, Amaral

  6. Taxonomic revision of Drymoluber Amaral, 1930 (Serpentes: Colubridae).

    PubMed

    Costa, Henrique Caldeira; Moura, Mrio Ribeiro; Feio, Renato Neves

    2013-01-01

    The present study is a taxonomic revision of the genus Drymoluber Amaral, 1930, using meristic and morphometric characters, aspects of external hemipenial morphology and body coloration. Sexual dimorphism occurs in D. dichrous and D. brazili but was not detected in D. apurimacensis. Morphological variation within D. dichrous is related to geographic distance between populations. Furthermore, variation in the number of ventrals and subcaudals in D. dichrous and D. brazili follows latitudinal and longitudinal clinal patterns. Drymoluber dichrous is diagnosed by the presence of 15-15-15 smooth dorsal scale rows with two apical pits, and 157-180 ventrals and 86-110 subcaudals; it occurs along the eastern versant of the Andes, in the Amazon forest, on the Guiana Shield, in the Atlantic forest, and its transitional areas with the Caatinga and Cerrado. Drymoluber brazili has 17-17-15 smooth dorsal scale rows with two apical pits, 182-202 ventrals and 109-127 subcaudals, and ranges throughout the Caatinga, Cerrado, Atlantic forest and transitional areas between these last two domains. Drymoluber apurimacensis has 13-13-13 smooth dorsal scale rows without apical pits, 158-182 ventrals and 84-93 subcaudals, and occurs in the Apurimac Valley, south of the Apurimac and Pampas rivers in Peru. PMID:26106780

  7. E-Interview: Norma Fox Mazer.

    ERIC Educational Resources Information Center

    Angel, Ann

    2001-01-01

    Presents an interview with Norma Fox Mazer, a writer of children's books. Describes how she creates a story. Discusses how writing a story, whether a short story or a novel, is an intricate balance of character, event, and voice. (SG)

  8. Omnivorous Representation Might Lead to Indigestion: Commentary on Amaral and Roeper

    ERIC Educational Resources Information Center

    Slabakova, Roumyana

    2014-01-01

    This article offers commentary that the Multiple Grammar (MG) language acquisition theory proposed by Luiz Amaral and Tom Roeper (A&R) in the present issue lacks elaboration of the psychological mechanisms at work in second language acquisition. Topics discussed include optionality in a speaker's grammar and the rules of verb position in

  9. The Enterprise Transformation Architecture (ETA) Larissa Zhurakovskaya, Amit Mitra and Amar Gupta

    E-print Network

    Tappert, Charles

    C4.1 The Enterprise Transformation Architecture (ETA) Larissa Zhurakovskaya, Amit Mitra and Amar closes that gap. Keywords--enterprise architecture; capability maturity; change management; agility in efficiency of production processes. Various frameworks for Enterprise Architectures have emerged as best

  10. Commentary to "Multiple Grammars and Second Language Representation," by Luiz Amaral and Tom Roeper

    ERIC Educational Resources Information Center

    Prez-Leroux, Ana T.

    2014-01-01

    In this commentary, the author defends the Multiple Grammars (MG) theory proposed by Luiz Amaral and Tom Roepe (A&R) in the present issue. Topics discussed include second language acquisition, the concept of developmental optionality, and the idea that structural decisions involve the lexical dimension. The author states that A&R's

  11. An Implementation of a Hopfield Network Kernel Jos'e N. Amaral, Guang Gao, Xinan Tang

    E-print Network

    Gao, Guang R.

    An Implementation of a Hopfield Network Kernel on EARTH Jos'e N. Amaral, Guang Gao, Xinan Tang Abstract EARTH is a multithreaded program execution and architecture model that hides communication and synchronization latencies through finegrain multithreading. EARTH provides a simple synchronization mechanism

  12. Normas de Emprstimo de Notebooks Da Finalidade

    E-print Network

    Paran, Universidade Federal do

    Normas de Emprstimo de Notebooks Da Finalidade Art. 1 - Garantir aos estudantes vinculados ao Programa de Benefcios Econmicos da UFPR (Probem), acesso a notebook para fins acadmicos, como ferramenta da devoluo. #12;Art. 13 No permitido: a) instalar e desinstalar qualquer programa do notebook

  13. Teaching Labor Relations with "Norma Rae"

    ERIC Educational Resources Information Center

    Taylor, Vicki Fairbanks; Provitera, Michael J.

    2011-01-01

    Undergraduate business students in North America are often unfamiliar with the labor organizing process and frequently fail to identify with the reasons why workers join unions. This article suggests a discussion exercise based on the 1979 film, "Norma Rae," by 20th Century Fox, as an effective tool for familiarizing students with fundamental

  14. Manual de Normas Gr cas CAPTULO 1

    E-print Network

    Prez, Carlos E.

    : Arquitectura de marca Construccin Tipografa Diagramacin Variantes permitidas de la marca Relacin con otras Ingeniera. LA MARCA ManualdeNormasGrcas 06 #12;CAPTULO 2 A continuacin revisaremos la arquitectura y la representacin gr ca de los conceptos bases. ARQUITECTURA DE MARCA Isotipo Logotipo Imagotipo

  15. Is MPI Suitable for a Generative Design-Pattern Paras Mehta, Jos Nelson Amaral, Duane Szafron

    E-print Network

    Szafron, Duane

    Is MPI Suitable for a Generative Design-Pattern System? Paras Mehta, José Nelson Amaral, Duane is ostensibly based on, and built upon the experience with, the successful CO2P3S system. Significant challenges that is an evolution of the Correct Object- Oriented Pattern-Based Parallel Programming System CO2P3S [12]. CO2P3S uses

  16. Amar and Shamir Module maps to appear in Nucleic Acids Research Title: Constructing module maps for integrated analysis of heterogeneous biological

    E-print Network

    Shamir, Ron

    Amar and Shamir Module maps to appear in Nucleic Acids Research 1 Title: Constructing module maps to appear in Nucleic Acids Research 3 Introduction Biological networks provide a comprehensive overview-protein interactions, genetic interactions, systems biology. #12;Amar and Shamir Module maps to appear in Nucleic

  17. Felsic plutonism in the Al AmarIdsas area, Kingdom of Saudi Arabia

    NASA Astrophysics Data System (ADS)

    Le Bel, L.; Laval, M.

    A tonalitetrondhjemite suite, calc-alkalic plutons and alkali-feldspar granites dated 670 and 580 Ma, intrude thick volcano-sedimentary rocks of the Al Amar group E of the Al Amar fault and the Abt schist W of the fault. The tonalitetrondhjemite suite (group I) is characterized by low Rb (50 ppm) and Sr (100-400 ppm) and by weakly fractionated rare-earth patterns (La/Yb Nca 2-3) with a weak negative Eu anomaly. Calc-alkalic plutons (group II) are richer in Rb (50-150 ppm), contain variable Sr (50-1000 ppm), and have strongly fractionated rare-earth patterns (La/Yb Nca 6-22) with no Eu anomaly. Alkali-feldspar granite (group III) is characterized by high Rb (150-200 ppm) and shows fractionated rare-earth patterns (La/Yb Nca 6-18) with a well-developed Eu anomaly. Group III includes 'specialized granites' with high Rb (300-400 ppm) and Sn (28-66 ppm), and rare-earth patterns showing a distinctive 'sea gull' profile with a very strong Eu anomaly (Eu*/Eu = 20). Oxygen isotope geochemistry suggests that group I rocks (x ?18O ca 7.0) were mantle-derived, and that group II and III rocks intruding the Al Amar group ( ?18O ca 7.9 and 8.8 respectively) were derived by remelting of group I, whereas those intruding Abt schist ( ?18O ca 8.7 and 10.8 respectively) were partially derived by anatexis of the Afif block. Magmatogenesis reflects an island-arc development. Rocks of group I represent the initial subduction phase. Syn- to late-tectonic plutons of group II intruded the arc east of the Al Amar fault and the accretionary prism (Abt schist) to the west, which was in collision with the older Afif block. Post-tectonic group III rocks were emplaced in an already cratonized area.

  18. Linear Artificial Molecular Muscles Yi Liu, Amar H. Flood, Paul A. Bonvallet,,| Scott A. Vignon, Brian H. Northrop,

    E-print Network

    Goddard III, William A.

    the contraction and extension of skeletal muscle, albeit on a shorter length scale. Fast scan-rate cyclicLinear Artificial Molecular Muscles Yi Liu, Amar H. Flood, Paul A. Bonvallet,,| Scott A. Vignon, Institute for Cell Mimetic Space Exploration (CMISE), and Mechanical and Aerospace Engineering Department

  19. Magnetoencephalography with an atomic magnetometer H. Xia, A. Ben-Amar Baranga, D. Hoffman, and M. V. Romalisa

    E-print Network

    Romalis, Mike

    Magnetoencephalography with an atomic magnetometer H. Xia, A. Ben-Amar Baranga, D. Hoffman, and M and mapping of brain magnetic fields evoked by auditory stimulation with a noncryogenic magnetometer based and allows the use of a compact magnetic shield with a high shielding factor. The magnetometer sensitivity

  20. Application of kinematic vorticity techniques for mylonitized Rocks in Al Amar suture, eastern Arabian Shield, Saudi Arabia

    NASA Astrophysics Data System (ADS)

    Hamimi, Z.; Kassem, O. M. K.; El-Sabrouty, M. N.

    2015-09-01

    The rotation of rigid objects within a flowing viscous medium is a function of several factors including the degree of non-coaxiality. The relationship between the orientation of such objects and their aspect ratio can be used in vorticity analyses in a variety of geological settings. Method for estimation of vorticity analysis to quantitative of kinematic vorticity number (Wm) has been applied using rotated rigid objects, such as quartz and feldspar objects. The kinematic vorticity number determined for high temperature mylonitic Abt schist in Al Amar area, extreme eastern Arabian Shield, ranges from 0.8 to 0.9. Obtained results from vorticity and strain analyses indicate that deformation in the area deviated from simple shear. It is concluded that nappe stacking occurred early during an earlier thrusting event, probably by brittle imbrications. Ductile strain was superimposed on the nappe structure at high-pressure as revealed by a penetrative subhorizontal foliation that is developed subparallel to tectonic contacts versus the underlying and overlying nappes. Accumulation of ductile strain during underplating was not by simple shear but involved a component of vertical shortening, which caused the subhorizontal foliation in the Al Amar area. In most cases, this foliation was formed concurrently with thrust sheets imbrications, indicating that nappe stacking was associated with vertical shortening.

  1. Roughness of moving elastic lines: Crack and wetting fronts E. Katzav,* M. Adda-Bedia, M. Ben Amar, and A. Boudaoud

    E-print Network

    Adda-Bedia, Mokhtar

    Roughness of moving elastic lines: Crack and wetting fronts E. Katzav,* M. Adda-Bedia, M. Ben Amar and planar tensile crack fronts. We derive from first principles their nonlinear equations of motion, using the generalized Griffith criterion for crack fronts and three standard mobility laws for contact lines. Then we

  2. Location of the Norma transient with the HEAO 1 scanning modulation collimator. [X ray source in Norma Constellation

    NASA Technical Reports Server (NTRS)

    Fabbiano, G.; Gursky, H.; Schwartz, D. A.; Schwarz, J.; Bradt, H. V.; Doxsey, R. E.

    1978-01-01

    A precise position has been obtained for an X-ray transient source in Norma. The location uncertainty includes a variable star previously suggested to be the optical counterpart. This transient is associated with the steady X-ray source MX 1608-52 and probably with an X-ray burst source. A binary system containing a low-mass primary and a neutron-star or black-hole secondary of a few solar masses is consistent with the observations.

  3. Uhuru observations of the Norma X-ray burster

    NASA Technical Reports Server (NTRS)

    Grindlay, J.; Gursky, H.

    1976-01-01

    Four X-ray bursts consistent with a single source in Norma are reported which were discovered by reexamining Uhuru data obtained between 1970 and 1973. The temporal and spectral characteristics of the bursts are described and shown to be similar to those displayed by bursts from the globular cluster NGC 6224. An error box of the source location is given, and it is found that both the position and intensity of the four bursts are consistent with those of 10 bursts detected by the Vela satellites in 1976. It is concluded that the source is the same as that observed by the Vela and is an X-ray burster with characteristics similar to those of certain other bursters. XB 1608-52 is suggested as the designation of this burster, possible burst models are considered, and it is noted that the error box of the present source contains an identified globular cluster.

  4. A Receding Halo Sub-structure Towards Norma

    NASA Astrophysics Data System (ADS)

    Chakrabarti, Sukanya

    2016-01-01

    We present results from follow-up spectroscopic observations of clustered Cepheid candidates identified from K-band light curves towards the Norma constellation (Chakrabarti et al. 2015), as well as others that we have found more recently. The average radial velocity of these stars is ~ 200 km/s, which is large and distinct from that of the Galaxy's stellar disk. These objects at l ~ -27 and b ~ -1 are therefore halo stars; using the period-luminosity relation of Type I Cepheids, they are at ~ 90 kpc. While the spectra do not have sufficient S/N to independently determine the metallicity and spectral type of the stars, there is a clear correspondence between the observed Brackett series lines in these observations and in known Type I Cepheids. Distances determined from the K-band period-luminosity relation (Matsunaga et al. 2013) and the 3.6 ?m period-luminosity relation (Scowcroft et al. 2011) agree closely, and I-band observations have confirmed the periods of these sources. The extinction corrected J - Ks colors of these sources are comparable to known Type I Cepheids (Persson et al. 2004). The observed radial velocity of these stars agrees with predictions from dynamical models (Chakrabarti & Blitz 2009). If these stars are indeed members of the predicted dark-matter dominated dwarf galaxy that perturbed the outer HI disk of the Milky Way, this would represent the first application of Galactoseismology. These observations also challenge models of the Galactic halo. Young Cepheid variables are unexpected in models of the Galactic halo, though star formation due to infall of gas-rich dwarf galaxies may well produce a small population of yet undiscovered Cepheids in the outer halo.

  5. The Norma arm region Chandra survey catalog: X-ray populations in the spiral arms

    SciTech Connect

    Fornasini, Francesca M.; Tomsick, John A.; Bodaghee, Arash; Krivonos, Roman A.; An, Hongjun; Rahoui, Farid; Gotthelf, Eric V.; Bauer, Franz E.; Stern, Daniel

    2014-12-01

    We present a catalog of 1415 X-ray sources identified in the Norma Arm Region Chandra Survey (NARCS), which covers a 2 0.8 region in the direction of the Norma spiral arm to a depth of ?20 ks. Of these sources, 1130 are point-like sources detected with ?3? confidence in at least one of three energy bands (0.5-10, 0.5-2, and 2-10 keV), five have extended emission, and the remainder are detected at low significance. Since most sources have too few counts to permit individual classification, they are divided into five spectral groups defined by their quantile properties. We analyze stacked spectra of X-ray sources within each group, in conjunction with their fluxes, variability, and infrared counterparts, to identify the dominant populations in our survey. We find that ?50% of our sources are foreground sources located within 1-2 kpc, which is consistent with expectations from previous surveys. Approximately 20% of sources are likely located in the proximity of the Scutum-Crux and near Norma arm, while 30% are more distant, in the proximity of the far Norma arm or beyond. We argue that a mixture of magnetic and nonmagnetic cataclysmic variables dominates the Scutum-Crux and near Norma arms, while intermediate polars and high-mass stars (isolated or in binaries) dominate the far Norma arm. We also present the cumulative number count distribution for sources in our survey that are detected in the hard energy band. A population of very hard sources in the vicinity of the far Norma arm and active galactic nuclei dominate the hard X-ray emission down to f{sub X} ? 10{sup 14} erg cm{sup 2} s{sup 1}, but the distribution curve flattens at fainter fluxes. We find good agreement between the observed distribution and predictions based on other surveys.

  6. RESOLUO N 42/03-COUN Fixa as normas para os Cursos de Especializao e

    E-print Network

    Paran, Universidade Federal do

    RESOLUO N 42/03-COUN Fixa as normas para os Cursos de Especializao e Aperfeioamento da a graduados e constituda por cursos sistematicamente organizados, visando desenvolver, complementar, aprimorar ou aprofundar conhecimentos, com previso de obteno de certificados. 1 Os cursos normatizados

  7. RESOLUO N 62/03-CEPE Estabelece normas gerais nicas para os cursos de

    E-print Network

    Paran, Universidade Federal do

    RESOLUO N 62/03-CEPE Estabelece normas gerais nicas para os cursos de ps-graduao stricto doutorado. 1 - O mestrado no constitui obrigatoriamente requisito prvio para inscrio no curso de doutorado. 2 - Os cursos de mestrado podero ter seus currculos organizados na forma de mestrado

  8. RESOLUO N 65/09-CEPE Estabelece normas gerais nicas para os cursos de ps-

    E-print Network

    Paran, Universidade Federal do

    RESOLUO N 65/09-CEPE Estabelece normas gerais nicas para os cursos de ps- graduao stricto/2007-83 e por unanimidade de votos, RESOLVE: CAPTULO I DA CONSTITUIO E OBJETIVOS Art. 1 Os cursos de ps-graduao compreendem dois nveis hierarquizados de cursos stricto sensu: mestrado e doutorado. 1 Os cursos de

  9. Proceedings of the Nordic Conference on Mathematics Teaching (NORMA-94) Lahti 1994. Research Report 141.

    ERIC Educational Resources Information Center

    Pehkonen, Erkki, Ed.

    This report contains papers from the Nordic Conference on Mathematics Teaching (NORMA-94). The first three papers are plenary talks aimed at giving the participants an opportunity to form a coherent view of the new theories of learning. The themes of the paper sessions addressed a variety of topics on different levels from elementary school to

  10. The population in the background of open clusters: Tracer of the Norma-Cygnus arm

    E-print Network

    A. K. Pandey; S. Sharma; K. Ogura

    2006-08-31

    We present colour-magnitude diagrams of open clusters, located in the range $112^\\circ populations in the background of clusters. Some of the populations are found to be located beyond the Perseus arm and may be the part of Norma-Cygnus (outer) arm. The outer arm seems to be continued from $l\\sim120^\\circ$ to $l\\sim235^\\circ$. The background populations follow the downward warp of the Galactic plane around $l\\sim240^\\circ$.

  11. Effects of contaminated soils from a former iron mine (Ait Amar, Morocco) on enchytraeids (Enchytraeus bigeminus) and predatory mites (Hypoaspis aculeifer) in standard laboratory tests.

    PubMed

    Madani, Safoura; Coors, Anja; Haddioui, Abdelmajid; Ksibi, Mohamed; Pereira, Ruth; Paulo Sousa, Jos; Rmbke, Jrg

    2015-09-01

    Mining activity is an important economic activity in severalNorth Atlantic Treaty Organization (NATO) and North African countries. Within their territory derelict or active mining explorations represent risks to surrounding ecosystems, but engineered-based remediation processes are usually too expensive to be an option for the reclamation of these areas. A project funded by NATO was performed, with the aim of finding a more eco-friendly solution for reclamation of these areas. As part of an overall risk assessment, the risk of contaminated soils to selected soil organisms was evaluated. The main question addressed was: Does the metal-contaminated soils from a former iron mine located at Ait Amar (Morocco),which was abandoned in the mid-Sixties, affect the reproduction of enchytraeids (Enchytraeus bigeminus) and predatory mites (Hypoaspis aculeifer)? Soil samples were taken at 20 plots along four transects covering the mine area and at a reference site about 15km away from the mine. The soils were characterized pedologically and chemically, which showed a heterogeneous pattern of metal contamination (mainly cadmium, copper, and chromium, sometimes at concentrations higher than European soil trigger values). The reproduction of enchytraeids (Enchytraeus bigeminus) and predatory mites (Hypoaspis aculeifer) was studied using standard laboratory tests according to OECD guidelines 220 (2004) and 226 (2008). The number of juveniles of E. bigeminus was reduced at several plots with high concentrations of Cd or Cu (the latter in combination with low pH values). There was nearly no effect of the metal contaminated soils on the reproduction of H. aculeifer. The overall lack of toxicity at the majority of the studied plots is probably caused by the low availability of the metals in these soils unless soil pH was very low. Different exposure pathways are likely responsible for the different reaction of mites and enchytraeids (hard-bodied versus soft-bodied organisms). The results of this study can be used not only for assessing the risk of contaminated soils but also could play a role for the identification of soil remediation programs. PMID:25985252

  12. Initial Results from NuSTAR Observations of the NORMA ARM

    NASA Technical Reports Server (NTRS)

    Bodaghee, Arash; Tomsick, John A.; Krivonos, Roman; Stern, Daniel; Bauer, Franz E.; Fornasini, Francesca M.; Barriere, Nicolas; Boggs, Steven E.; Christensen, Finn E.; Zhang, William W.

    2014-01-01

    Results are presented for an initial survey of the Norma Arm gathered with the focusing hard X-Ray Telescope NuSTAR. The survey covers 0.2 sq deg of sky area in the 3-79 keV range with a minimum and maximum raw depth of 15 ks and 135 ks, respectively. Besides a bright black-hole X-ray binary in outburst (4U 1630-47) and a new X-ray transient (NuSTAR J163433-473841), NuSTAR locates three sources from the Chandra survey of this region whose spectra are extended above 10 keV for the first time: CXOU J163329.5-473332, CXOU J163350.9-474638, and CXOU J163355.1-473804. Imaging, timing, and spectral data from a broad X-ray range (0.3-79 keV) are analyzed and interpreted with the aim of classifying these objects. CXOU J163329.5-473332 is either a cataclysmic variable or a faint low-mass X-ray binary. CXOU J163350.9-474638 varies in intensity on year-long timescales, and with no multi-wavelength counterpart, it could be a distant X-ray binary or possibly a magnetar. CXOU J163355.1-473804 features a helium-like iron line at 6.7 keV and is classified as a nearby cataclysmic variable. Additional surveys are planned for the Norma Arm and Galactic Center, and those NuSTAR observations will benefit from the lessons learned during this pilot study.

  13. Initial results from NuSTAR observations of the Norma Arm

    SciTech Connect

    Bodaghee, Arash; Tomsick, John A.; Krivonos, Roman; Barrire, Nicolas; Boggs, Steven E.; Craig, William W.; Stern, Daniel; Bauer, Franz E.; Fornasini, Francesca M.; Christensen, Finn E.; Gotthelf, Eric V.; Hailey, Charles J.; Mori, Kaya; Harrison, Fiona A.; Hong, Jaesub; Zhang, William W.

    2014-08-10

    Results are presented for an initial survey of the Norma Arm gathered with the focusing hard X-Ray Telescope NuSTAR. The survey covers 0.2 deg{sup 2} of sky area in the 3-79 keV range with a minimum and maximum raw depth of 15 ks and 135 ks, respectively. Besides a bright black-hole X-ray binary in outburst (4U 163047) and a new X-ray transient (NuSTAR J163433473841), NuSTAR locates three sources from the Chandra survey of this region whose spectra are extended above 10 keV for the first time: CXOU J163329.5473332, CXOU J163350.9474638, and CXOU J163355.1473804. Imaging, timing, and spectral data from a broad X-ray range (0.3-79 keV) are analyzed and interpreted with the aim of classifying these objects. CXOU J163329.5473332 is either a cataclysmic variable or a faint low-mass X-ray binary. CXOU J163350.9474638 varies in intensity on year-long timescales, and with no multi-wavelength counterpart, it could be a distant X-ray binary or possibly a magnetar. CXOU J163355.1473804 features a helium-like iron line at 6.7 keV and is classified as a nearby cataclysmic variable. Additional surveys are planned for the Norma Arm and Galactic Center, and those NuSTAR observations will benefit from the lessons learned during this pilot study.

  14. Interplanetary Space Weather and Its Planetary Connection Norma Crosby, Volker Bothmer, Rainer Facius, Jean-Mathias Griemeier, Xenophon Moussas, Mikhail

    E-print Network

    Withers, Paul

    Interplanetary Space Weather and Its Planetary Connection Norma Crosby, Volker Bothmer, Rainer planets in our solar system, the understanding of interplanetary space weather is a vital subject today relevant space weather issues. Yet whether it is Mars or a different planet, the fundamental facts

  15. Investigating CXOU J163802.6471358: A new pulsar wind nebula in the norma region?

    SciTech Connect

    Jakobsen, Simone J.; Watson, Darach; Tomsick, John A.; Gotthelf, Eric V.; Kaspi, Victoria M.

    2014-06-01

    We present the first analysis of the extended source CXOU J163802.6471358, which was discovered serendipitously during the Chandra X-ray survey of the Norma region of the Galactic spiral arms. The X-ray source exhibits a cometary appearance with a point source and an extended tail region. The complete source spectrum is fitted well with an absorbed power law model and jointly fitting the Chandra spectrum of the full source with one obtained from an archived XMM-Newton observation results in best fit parameters N {sub H} =1.5{sub ?0.5}{sup +0.7}10{sup 23} cm{sup ?2} and ?=1.1{sub ?0.6}{sup +0.7} (90% confidence uncertainties). The unabsorbed luminosity of the full source is then L{sub X}?4.810{sup 33}d{sub 10}{sup 2} erg s{sup 1} with d {sub 10} = d/10 kpc, where a distance of 10 kpc is a lower bound inferred from the large column density. The radio counterpart found for the source using data from the Molonglo Galactic Plane Survey epoch-2 shows an elongated tail offset from the X-ray emission. No infrared counterpart was found. The results are consistent with the source being a previously unknown pulsar driving a bow shock through the ambient medium.

  16. Etnografa acelerada para transformar normas sociales sobre gnero y sexualidad en hombres puertorriqueos heterosexuales1,2

    PubMed Central

    Ortiz-Torres, Blanca; Rivera-Ortiz, Rafael J.; Mendoza, Sigrid

    2014-01-01

    Resumen La construccin de roles de gnero dominantes contribuyen al riesgo de contraer VIH, y por tal razn se ha urgido a que se integren las normas sociales relativas al gnero en las intervenciones preventivas del VIH. Este estudio pretende adaptar y desarrollar una intervencin que facilite la transformacin de normas sociales del gnero y de prcticas sexuales en hombres puertorriqueos. La intervencin propone transformar normas sociales relacionadas al gnero y sexualidad en barras comunitarias utilizando el modelo de lderes de opinin. Luego de ser elegidos/as, los/as lderes de opinin diseminan mensajes integrando la importancia de relaciones equitativas entre parejas para la prevencin del VIH. La primera fase de esta intervencin es discutida en este artculo, la cual incluye un proceso de etnografa acelerada para identificar los escenarios comunitarios en los que podemos desarrollar esta intervencin y permitirnos entender la cultura de las barras comunitarias. A partir de las observaciones etnogrficas, pudimos: desarrollar un protocolo de seguridad para realizar las observaciones, desarrollar un perfil de la cultura de las barras, elegir las barras a participar en las dos condiciones del estudio y adaptar los instrumentos de la intervencin para que respondieran a la particularidad de los/as participantes. PMID:25530828

  17. Whole-Genome Sequence of Leptospira interrogans Serovar Hardjo Subtype Hardjoprajitno Strain Norma, Isolated from Cattle in a Leptospirosis Outbreak in Brazil

    PubMed Central

    Soares, S. C.; Mendes, T. A.; Raittz, R. T.; Moreira, E. C.; Leite, R.; Fernandes, G. R.; Haddad, J. P. A.; Ortega, J. Miguel

    2015-01-01

    Leptospirosis is caused by pathogenic bacteria of the genus Leptospira spp. This neglected re-emergent disease has global distribution and relevance in veterinary production. Here, we report the whole-genome sequence and annotation of Leptospira interrogans serovar Hardjo subtype Hardjoprajitno strain Norma, isolated from cattle in a livestock leptospirosis outbreak in Brazil. PMID:26543126

  18. Whole-Genome Sequence of Leptospira interrogans Serovar Hardjo Subtype Hardjoprajitno Strain Norma, Isolated from Cattle in a Leptospirosis Outbreak in Brazil.

    PubMed

    Cosate, M R V; Soares, S C; Mendes, T A; Raittz, R T; Moreira, E C; Leite, R; Fernandes, G R; Haddad, J P A; Ortega, J Miguel

    2015-01-01

    Leptospirosis is caused by pathogenic bacteria of the genus Leptospira spp. This neglected re-emergent disease has global distribution and relevance in veterinary production. Here, we report the whole-genome sequence and annotation of Leptospira interrogans serovar Hardjo subtype Hardjoprajitno strain Norma, isolated from cattle in a livestock leptospirosis outbreak in Brazil. PMID:26543126

  19. A review of "Law, Crime and English Society, 1660-1830" by Norma Landau and "Crime, Gender and Social Order in Early Modern England" by Garthine Walker

    E-print Network

    Sherman, Donovan

    2010-01-01

    with the Mosaic distinction? in that he moves away from allegory that Spenser uses as his defense and is thus left exposed (316). Norma Landau, ed. Law, Crime and English Society, 1660-1830. Cambridge: CambridgeUniversity Press, 2002. xii + 264 pp. $60....00. Garthine Walker. Crime, Gender and Social Order in Early Modern England. Cambridge: CambridgeUniversity Press, 2003. xvi + 310 pp. $60.00. Review by donovan sherman, university of california, irvine. The tension between postmodern philosophy...

  20. AMAR: A Computational Model of Autosegmental Phonology

    E-print Network

    Albro, Daniel M.

    1993-10-01

    This report describes a computational system with which phonologists may describe a natural language in terms of autosegmental phonology, currently the most advanced theory pertaining to the sound systems of human ...

  1. Uhuru observations of 4U 1608-52 - The 'steady' X-ray source associated with the X-ray burst source in Norma

    NASA Technical Reports Server (NTRS)

    Tananbaum, H.; Chaisson, L. J.; Forman, W.; Jones, C.; Matilsky, T. A.

    1976-01-01

    Data are presented for the X-ray source 4U 1608-52, summarizing its light curve, location, and spectral parameters. Evidence is presented showing that this source is the 'steady' X-ray counterpart of the X-ray burst source in Norma. The spectrum of the 'steady' source is compared with the spectrum observed during two bursts, and it is noted that there is substantially more low-energy absorption during the bursts. The 'steady' source spectral data are used to examine the optical data, and it is concluded that if the X-ray spectrum is thermal, then a globular-cluster counterpart probably would have been detected (whereas none has been). Further X-ray and optical observations are suggested for this source, since an optical identification may be central in determining whether all X-ray bursts have a common origin and if this origin requires a globular-cluster environment.

  2. NIPS-NORMA station-A combined facility for neutron-based nondestructive element analysis and imaging at the Budapest Neutron Centre

    NASA Astrophysics Data System (ADS)

    Kis, Zoltn; Szentmiklsi, Lszl; Belgya, Tams

    2015-04-01

    Neutron attenuation, scattering or radiative capture are used in various non-destructive methods to gain morphological, structural, elemental or isotopic information about the sample under study. The combined use of position-sensitive prompt gamma-ray detection (i.e. prompt gamma-ray activation imaging, PGAI) and neutron radiography/tomography (NR/NT) makes it possible to determine the 3D distribution of major elements and to visualize internal structures of heterogeneous objects in a non-destructive way. Based on earlier experience, the first ever permanent facility for this purpose, NIPS-NORMA, was constructed at the Budapest Neutron Centre, Hungary in 2012. The installation consists of a well-shielded, Compton-suppressed HPGe detector; a CCD-camera based imaging equipment and a motorized positioning system with sample support. Conventional PGAA measurements and NR/NT imaging using guided cold neutrons are the basic methods that form the basis of the more sophisticated experimental method called NR/NT-driven PGAI. The current status of the experimental station and its characteristics are described in the present paper.

  3. Abundant molecular gas and inefficient star formation in intracluster regions: ram pressure stripped tail of the Norma galaxy ESO137-001

    SciTech Connect

    Jchym, Pavel; Combes, Franoise; Cortese, Luca; Sun, Ming; Kenney, Jeffrey D. P.

    2014-09-01

    For the first time, we reveal large amounts of cold molecular gas in a ram-pressure-stripped tail, out to a large 'intracluster' distance from the galaxy. With the Actama Pathfinder EXperiment (APEX) telescope, we have detected {sup 12}CO(2-1) emission corresponding to more than 10{sup 9} M {sub ?} of H{sub 2} in three H? bright regions along the tail of the Norma cluster galaxy ESO 137-001, out to a projected distance of 40 kpc from the disk. ESO 137-001 has an 80 kpc long and bright X-ray tail associated with a shorter (40 kpc) and broader tail of numerous star forming H II regions. The amount of ?1.5 10{sup 8} M {sub ?} of H{sub 2} found in the most distant region is similar to molecular masses of tidal dwarf galaxies, though the standard Galactic CO-to-H{sub 2} factor could overestimate the H{sub 2} content. Along the tail, we find the amount of molecular gas to drop, while masses of the X-ray-emitting and diffuse ionized components stay roughly constant. Moreover, the amounts of hot and cold gas are large and similar, and together nearly account for the missing gas from the disk. We find a very low SFE (?{sub dep} > 10{sup 10} yr) in the stripped gas in ESO 137-001 and suggest that this is due to a low average gas density in the tail, or turbulent heating of the interstellar medium that is induced by a ram pressure shock. The unprecedented bulk of observed H{sub 2} in the ESO 137-001 tail suggests that some stripped gas may survive ram pressure stripping in the molecular phase.

  4. THE DISCOVERY OF A MOLECULAR CAVITY IN THE NORMA NEAR ARM ASSOCIATED WITH H.E.S.S {gamma}-RAY SOURCE LOCATED IN THE DIRECTION OF WESTERLUND 1

    SciTech Connect

    Luna, Abraham; Mayya, Y. D.; Carrasco, Luis; Bronfman, Leonardo

    2010-04-10

    We report on the discovery of a molecular cavity in the Norma near arm in the general direction of Westerlund 1 (Wd1), but not associated with it. The cavity has a mean radial velocity of -91.5 km s{sup -1}, which differs by as much as {approx}40 km s{sup -1} from the mean radial velocity of the Wd1 stars. The cavity is surrounded by a fragmented molecular shell of an outer diameter of about 100 pc and 10{sup 6} M {sub sun}, which is expanding at velocities of 6 to 8 km s{sup -1}. The amount of kinetic energy involved in the expanding shell is {approx}10{sup 51} erg. Inside this cavity, the atomic H I gas surface density is also the lowest. Structure of the extended Very High Energetic {gamma}-ray emission, recently reported by the H.E.S.S. collaboration, coincides with the cavity. The observed morphology suggests that the inner wall of the molecular shell is the zone of the {gamma}-ray emission, and not the dense gas surrounding massive stars of Wd1 as had been speculated by the H.E.S.S. collaboration. A likely candidate responsible for creating the observed cavity and the {gamma}-ray emission is the pulsar PSR J1648 - 4611.

  5. IM Normae: A Second T Pyx? (Abstract)

    NASA Astrophysics Data System (ADS)

    Patterson, J.; Monard, B.; Warhurst, P.; Myers, G.

    2015-12-01

    (Abstract only) T Pyx is the Galaxy's most famous recurrent nova, erupting to magnitude 6 about every 20 years. For nova hunters and variable-star observers generally, it should be quite easy to discover stars with similar properties. There are probably half a million CVs out to the distance of T Pyx, and most have an underlying structure similar to that of T Pyx: low-mass secondary, fairly massive white dwarf, short orbital period. But of these half million stars, there is no second T Pyx. The star is unique in another way: its orbital period is increasing on a timescale of 300,000 years. Like the proverbial bat out of hell. A 2002 nova eruption nominated a second star for this elite club: IM Nor, a short-orbital-period (2.5 hours) star which previously erupted in 1920. We began a program of time-series photometry to track the shallow eclipsesto test for orbital period change, the other signature of T Pyx resemblance. By 2015 we found this effect: Porb increases on a timescale of 2 million years. Thus, the two stars appear to be blowing themselves apart on a timescale of roughly a million years. This could explain why the stars are so rare: because they are rapidly self-immolating. And that could happen because the classical-nova outburst overwhelms the low-mass secondaries that live in short-period CVsleading to unstable mass transfer which quickly evaporates the secondary. This implies that all short-Porb classical novae should be "recurrent" (erupting on a timescale of decades). Greater attention to CP Pup (1942), RW UMi (1956), GQ Mus (1983), and V Per (1887) is definitely warranted.

  6. ANA TERESA FREITAS Fora da norma

    E-print Network

    Instituto de Sistemas e Robotica

    duas das reas mais competitivas do momento: a biologia e a informtica por sara s m urante metade da biologia, em particular da gentica, onde nenhum projeto, hoje em dia, dispensa um especialista em, arregaou as mangas e com outras duas scias (Susa- na Santos, biloga molecular, e Alexandra Fernandes

  7. The Anatomical Organization of the Central Nervous System David G. Amaral

    E-print Network

    Ulanovsky, Nachum

    . The amygdala adjusts the heart rate, respiration, and other homeostatic mechanisms to allow successful are involved in regulating heart rate, respiration, and arousal. The hippocampus is not involved in hitting

  8. Osteology and Cartilaginous Elements of Trilepida salgueiroi (Amaral, 1954) (Scolecophidia: Leptotyphlopidae).

    PubMed

    Pinto, Roberta R; Martins, Angele R; Curcio, Felipe; Ramos, Luciana de O

    2015-10-01

    Morphological and anatomical studies on the Leptotyphlopidae have increased in the past 10 years, providing important data on the systematics of this group, mainly focused on the skull and lower jaw morphology. However, most studies are based on a single specimen, rarely combining more than one single method of assessing morphological information. Therefore, several data on postcranial morphology, sexual dimorphism, and ontogenetic and intraspecific variation of leptotyphlopids remain poorly understood. Herein, we provide a detailed description of the cranial and postcranial skeleton of Trilepida salgueiroi based on more than 20 specimens (including males, females and juveniles), as well as a description of osteology and cartilaginous elements through the use of combined methodologies such as X-ray scanning, high resolution CT-scanning, and clearing and staining of articulated and disarticulated specimens. We also provide data on the presence/absence of dimorphic and intraspecific variation of the observed characters. The presence of a statolithic mass in the cavum vestibuli differs from the pattern found in other scolecophidians. A correlation of dorsal vertebrae with ventral and subcaudal scales was found (1:1), as well as total number of vertebrae with middorsal scales (1:1), thoracolumbar vertebrae and ventral scales (1:1), and a higher number of caudal vertebra with subcaudal scales (1.23:1). Intraspecific variation was found in several elements of the skull, lower jaw, pelvic girdle and vertebral number, but no evidence of sexual dimorphism was found in any of the species characters analysed. The homologies of several elements are discussed, although still remaining poorly understood and unknown. PMID:26119424

  9. A Visual Query Language for HEP Analysis Vasco Amaral, Sven Helmer, Guido Moerkotte

    E-print Network

    Mannheim, Universitt

    -- Pheasant is the first proposal for a declarative domain specific visual query language for HEP data used in our unifying framework Pheasant (PHysi- cist's EASy ANalysis Tool). This conceptual layer

  10. Field-free particle focusing in microfluidic plugs G. K. Kurup and Amar S. Basu

    E-print Network

    Basu, Amar S.

    . This paper reports a passive technique for particle concentration in water-in-oil plugs which relies of Physics. Related Articles Deterministic separation of cancer cells from blood at 10 mL/min AIP Advances 2

  11. Integral de norma M. C. Fausto Arturo Contreras Rosales

    E-print Network

    Vela-Arevalo, Luz V.

    > 0 tal que |f(v) - f(u) - f (z)(v - u)| (v - u) siempre que u z v, y [u, v] [a, b] (z - , z(u) - f (z)(z - u)| tal modo integrable sobre [a, b] si existe un numero A que satisface que para cada > 0 podemos elegir un > 0 tal

  12. Normas para solicitaes de alunos CAP Esta norma versa sobre os documentos que se fazem necessrios para a

    E-print Network

    documentos que se fazem necessrios para a solicitao das demandas de alunos junto que se entra com o pedido; e. Horrio previsto da defesa; f. Membros docentes; #12;12. Cpia da tese de doutorado a ser defendida ou declarao do aluno se

  13. 9780199605835 03-Ben-Amar-c03 BenAmar (Typeset by SPi) 65 of 94 March 4, 2011 12:50 OUP UNCORRECTED PROOF REVISES, 4/3/2011, SPi

    E-print Network

    Shelley, Michael

    involving complex fluids, such as peristaltic pumping and sperm motility in the reproductive tracts, have, in a biological fluid is that of sperm motility. In studies of collective dynamics, Dombrowski et al. (2004) have

  14. Neural and Behavioral Substrates of Mood and Mood Richard J. Davidson, David A. Lewis, Lauren B. Alloy, David G. Amaral,

    E-print Network

    Wisconsin at Madison, University of

    the course and characteristics of de- pression (Abramson et al 2001) and bipolar disorder (BPD). Eight processes involved in depression and BPD onset and maintenance. Finally, we explore opportunities for future (Belsher and Costello 1988; Judd 1997) as is BPD (Goodwin and Jamison 1990). Second, life events may play

  15. Chy 475--Amar Two Body Problem Given below is the classical energy expression for two atoms interacting with each other

    E-print Network

    Amar, François G.

    interacting with each other via a potential V(r) where r is the distance between the two particles,2 2 + vz,2 2 ] + V(r) but in vector notation we might write: E = 1 2 m1 r v1 2 + 1 2 m2 r v2 2 + V(r) We'll now define the center-of-mass coordinate vector and the interparticle vector: ! r R = m1 r r1

  16. Bipart: Learning Block Structure for Activity Yang Mu, Henry Z. Lo, Wei Ding, Kevin Amaral, and Scott E. Crouter

    E-print Network

    Ding, Wei

    and test sets, combining both to form a projection space which materializes block-level constraints. Thus of Bipart, especially in low-information experimental settings. Index Terms Accelerometers, semisupervised proposes a method to learn this block information from both training and test sets, and shows

  17. di Sabato 11 luglio 2015 Universita' di SalernoRubrica

    E-print Network

    Costagliola, Gennaro

    /07/2015 MATRIMONIO SAME SEX, LA CORTE D'APPELLO: E' LEGITTIMO 29 Salernonotizie.it 10/07/2015 MATRIMONIO GAY, DOCENTI Metropolis Salerno 11/07/2015 SALERNO - MATRIMONIO GAY IN ARGENTINA: LA BUROCRAZIA DIVIDE LA COPPIA 10 5 Le 11/07/2015 MATRIMONIO GAY, SI' ALLE DUE PROFESSORESSE 13 11 Il Quotidiano del Sud - Irpinia 11

  18. Mandibular shape analysis in fossil hominins: Fourier descriptors in norma lateralis.

    PubMed

    Lestrel, P E; Wolfe, C A; Bodt, A

    2013-08-01

    Biological shape can be defined as the boundary of a form in 2-space (R(2)). An earlier study (Lestrel et al., 2010, HOMO-J. Comp. Hum. Biol.) of the cranial vault found that there were statistically significant differences between each of the three groups: H. erectus, H. heidelbergensis, and H. neanderthalensis compared with H. sapiens. In contrast, there was no statistically significant difference among the first three groups. These results suggest that these three groups may have formed single evolving lineage while H. sapiens represents a separate evolutionary development. The purpose of the current research was to discern if the mandible reflected a similar pattern as the cranial vault data. This study used lateral jpeg images of the mandible. Five fossil samples were used: A. robustus (n=7), H. erectus (n=12), H. heidelbergensis (n=4), H. neanderthalensis (n=22) and H. sapiens (n=61). Each mandible image was pre-processed with Photoshop Elements. Each image was then submitted to a specially written routine that digitized the 84 points along the mandible boundary. Each mandible was fitted with elliptical Fourier functions (EFFs). Procrustes superimposition was imposed to insure minimum shape differences. The mandible results largely mirrored the earlier cranial vault study with one exception. Statistically significant results were obtained for the mandible between the H. erectus and H. neanderthalensis samples in contrast to the earlier cranial vault data. F-tests disclosed that the statistical significance was limited to the anterior symphysis of the mandible. This mosaic pattern may be explained by the reduction in prognathism with the concomitant if rudimentary development of the chin as seen in H. neanderthalensis compared to H. erectus. PMID:23769600

  19. Departamento de Trabajo de EE UU Administracin de Normas de Empleo

    E-print Network

    no autorizadas. CUMPLIMIENTO El/La Secretario(a) de Trabajo puede entablar pleitos para impedir violaciones y ADICIONAL Se puede obtener informacin adicional al igual que se pueden presentar quejas de violaciones en

  20. Discovery of a new bona fide luminous blue variable in Norma

    NASA Astrophysics Data System (ADS)

    Gvaramadze, V. V.; Kniazev, A. Y.; Berdnikov, L. N.

    2015-12-01

    We report the results of optical spectroscopy of the candidate evolved massive star MN44 revealed via detection of a circular shell with the Spitzer Space Telescope. First spectra taken in 2009 May-June showed the Balmer lines in emission as well as numerous emission lines of iron, which is typical of luminous blue variables (LBVs) near the visual maximum. New observations carried out in 2015 May-September detected significant changes in the spectrum, indicating that the star became hotter. We found that these changes are accompanied by significant brightness variability of MN44. In particular, the Ic-band brightness decreased by ? 1.6 mag during the last six years and after reaching its minimum in 2015 June has started to increase. Using archival data, we also found that the Ic-band brightness increased by ?3 mag in ?30 yr preceding our observations. MN44 therefore represents the 17th known example of the Galactic bona fide LBVs. We detected a nitrogen-rich knot to the north-west of the star, which might represent an interstellar cloudlet interacting with the circumstellar shell. We discuss a possible association between MN44 and the INTEGRAL transient source of hard X-ray emission IGR J16327-4940, implying that MN44 might be either a colliding-wind binary or a high-mass X-ray binary.

  1. The slow decline of the Galactic recurrent novae T Pyxidis, IM Normae, and CI Aquilae

    NASA Astrophysics Data System (ADS)

    Caleo, Andrea; Shore, Steven N.

    2015-05-01

    A distinguishing trait of the three known Galactic recurrent novae with the shortest orbital periods, T Pyx, IM Nor, and CI Aql, is that their optical decline time-scales are significantly longer than those of the other recurrent systems. On the other hand, some estimates of the mass of the ejecta, the velocity of the ejecta, and the duration of the soft X-rays emission of these systems are of the order of those of the other recurrent systems and the fast classical novae. We put forth a tentative explanation of this phenomenon. We propose that in these systems part of the material transferred from the companion during the first few days of the eruption remains within the Roche lobe of the white dwarf, preventing the radiation from ionizing the ejecta of the system and increasing the optical decline time-scale. We explain why this phenomenon is more likely in systems with a high mass transfer rate and a short orbital period. Finally, we present a schematic model that shows that the material transferred from the companion is sufficient to absorb the radiation from the white dwarf in these systems, ultimately supporting this scenario as quantitatively realistic.

  2. La Lengua Escrita como Norma Fonetica (The Written Language as Phonetic Norm)

    ERIC Educational Resources Information Center

    Diaz-Plaja, Guillermo

    1977-01-01

    A collectivity can be defined by the verbal instrument which binds it together. By extension of this thought of Marshall MacLuhan, the importance of the written language as normative for the uniformity, universality and preservation of the phonetic system of the language is discussed. (Text is in Spanish.) (AMH)

  3. Discovery of a new bona fide luminous blue variable in Norma

    E-print Network

    Gvaramadze, V V; Berdnikov, L N

    2015-01-01

    We report the results of optical spectroscopy of the candidate evolved massive star MN44 revealed via detection of a circular shell with the Spitzer Space Telescope. First spectra taken in 2009 May--June showed the Balmer lines in emission as well as numerous emission lines of iron, which is typical of luminous blue variables (LBVs) near the visual maximum. New observations carried out in 2015 May--September detected significant changes in the spectrum, indicating that the star became hotter. We found that these changes are accompanied by significant brightness variability of MN44. In particular, the I_c-band brightness decreased by \\approx 1.6 mag during the last six years and after reaching its minimum in 2015 June has started to increase. Using archival data, we also found that the I_c-band brightness increased by \\approx 3 mag in \\approx 30 yr preceding our observations. MN44 therefore represents the seventeenth known example of the Galactic bona fide LBVs. We detected a nitrogen-rich knot to the northwes...

  4. Chy 475--Amar--Spring 2013 Two Body Problem Given below is the classical energy expression for two atoms interacting with each other

    E-print Network

    Amar, Franois G.

    atoms interacting with each other via a potential V(r) where r is the distance between the two particles 2 + vz,2 2 ] + V(r) but in vector notation we might write: E = 1 2 m1 v1 2 + 1 2 m2 v2 2 + V(r) We R - m2 M r # $% & '( R - m2 M r # $% & '(+ 1 2 m2 R + m1 M r # $% & '( R + m1 M r # $% & '(+ V(r

  5. An Electrochemical Color-Switchable RGB Dye: Tristable [2]Catenane Wei-Qiao Deng, Amar H. Flood, J. Fraser Stoddart, and William A. Goddard III*,

    E-print Network

    Goddard III, William A.

    of an electronic paper display (E-PAD), a low-cost and reflective display that feels like a document printed on the phenomenon of electrowetting to manipulate8 microscale liquid droplets. Although these black/white prototypes of a single "RGB" dye compound, which can display all three colors depending on the applied voltage. Compared

  6. FOUR HIGHLY LUMINOUS MASSIVE STAR-FORMING REGIONS IN THE NORMA SPIRAL ARM. I. MOLECULAR GAS AND DUST OBSERVATIONS

    SciTech Connect

    Garay, Guido; Mardones, Diego; Bronfman, Leonardo; May, Jorge; Chavarria, Luis; Nyman, Lars-Ake

    2010-02-10

    We report molecular line and dust continuum observations, made with the Swedish-ESO Submillimeter Telescope, toward four young high-mass star-forming regions associated with highly luminous (L>6x10{sup 5}L{sub odot}) Infrared Astronomical Satellite sources (15290-5546, 15502-5302, 15567-5236, and 16060-5146). Molecular emission was mapped in three lines of CS (J = 2 -> 1, 3 -> 2, and 5 -> 4), two lines of SiO (J = 2 -> 1 and 3 -> 2), two rotational transitions of CH{sub 3}OH (J{sub k} = 3{sub k} -> 2{sub k} and 2{sub k} -> 1{sub k}), and in the C{sup 34}S(J = 3 -> 2) line. In addition, single spectra at the peak position were taken in the CO(J = 1 -> 0), {sup 13}CO(J = 1 -> 0), and C{sup 18}O(J = 1 -> 0) lines. We find that the luminous star-forming regions are associated with molecular gas and dust structures with radii of typically 0.5 pc, masses of {approx}5 x 10{sup 3} M{sub sun}, column densities of {approx}5 x 10{sup 23} cm{sup -2}, molecular hydrogen densities of typically {approx}2 x 10{sup 5} cm{sup -3}, and dust temperatures of {approx}40 K. The 1.2 mm dust continuum observations further indicate that the cores are centrally condensed, having radial density profiles with power-law indices in the range 1.9-2.3. We find that under these conditions dynamical friction by the gas plays an important role in the migration of high-mass stars toward the central core region, providing an explanation for the observed stellar mass segregation within the cores. The CS profiles show two distinct emission components: a bright component, with line widths of typically 5 km s{sup -1} (FWHM), and a weaker and wider velocity component, which typically extends up to +-13 km s{sup -1} from the ambient cloud velocity. The SiO profiles also show emission from both components, but the intensity of the pedestal feature relative to that of the bright component is stronger than for CS. The narrow SiO component is likely to trace warm ambient gas close to the recently formed massive stars, whereas the high velocity emission indicates mass outflows produced by either the expansion of the H II regions, stellar winds, and/or collimated outflows. We find that the abundances of CS, CH{sub 3}OH, and SiO, relative to H{sub 2}, in the warm ambient gas of the massive cores are typically 4 x 10{sup -8}, 6 x 10{sup -9}, and 5 x 10{sup -11}, respectively.

  7. Este catlogo contm informaes sobre as normas vigentes na Universidade sobre os cursos de graduao e uma breve

    E-print Network

    Neto, Gasto Bierrenbach Lima

    cursos de graduao e uma breve apresentao do Departamento de Astronomia. Uma descrio dos objetivos do curso de Bacharelado em Astronomia, o fluxograma das disciplinas obrigatrias assim como obrigatrias e parte das optativas oferecidas por outros cursos/unidades. Finalmente so apresentados o

  8. El Escritor y las Normas del Canon Literario (The Writer and the Norms of the Literary Canon).

    ERIC Educational Resources Information Center

    Policarpo, Alcibiades

    This paper speculates about whether a literary canon exists in contemporary Latin American literature, particularly in the prose genre. The paper points to Carlos Fuentes, Gabriel Garcia Marquez, and Mario Vargas Llosa as the three authors who might form this traditional and liberal canon with their works "La Muerte de Artemio Cruz" (Fuentes),

  9. Amar te Duele (Love Hurts): Sexual relationship power, intimate partner violence, depression symptoms and HIV risk among female sex workers who use drugs and their non-commercial, steady partners in Mexico

    PubMed Central

    Ulibarri, Monica D.; Roesch, Scott; Rangel, M. Gudelia; Staines, Hugo; Amaro, Hortensia; Strathdee, Steffanie A.

    2014-01-01

    A significant body of research among female sex workers (FSWs) has focused on individual-level HIV risk factors. Comparatively little is known about their non-commercial, steady partners who may heavily influence their behavior and HIV risk. This cross-sectional study of 214 FSWs who use drugs and their male steady partners aged ?18 in two Mexico-U.S. border cities utilized a path-analytic model for dyadic data based upon the Actor-Partner Interdependence Model to examine relationships between sexual relationship power, intimate partner violence (IPV), depression symptoms, and unprotected sex. FSWs relationship power, IPV perpetration and victimization were significantly associated with unprotected sex within the relationship. Male partners depression symptoms were significantly associated with unprotected sex within the relationship. Future HIV prevention interventions for FSWs and their male partners should address issues of sexual relationship power, IPV, and mental health both individually and in the context of their relationship. PMID:24743959

  10. What Is a Rule of Grammar?

    ERIC Educational Resources Information Center

    Lardiere, Donna

    2014-01-01

    This article offers commentary on the Multiple Grammars (MG) language acquisition theory proposed by Luiz Amaral and Tom Roeper in this issue. It argues that more precise definitions are needed for the terms "rule," "simple," and "productive." Topics discussed include Amaral and Roeper's verb second (V2) rule,

  11. A Dictionary-Based Multi-Corpora Text Compression System

    E-print Network

    Mukherjee, Amar

    A Dictionary-Based Multi-Corpora Text Compression System Weifeng Sun Nan Zhang Amar Mukherjee Computer Science Department, University of Central Florida, Orlando, Fl.32816 {wsun, nzhang, amar on BWT and PPM. StarNT is a dictionary-based fast lossless text transform. The main idea is to recode

  12. Implications for Child Bilingual Acquisition, Optionality and Transfer

    ERIC Educational Resources Information Center

    Serratrice, Ludovica

    2014-01-01

    Amaral & Roeper's Multiple Grammars (MG) proposal offers an appealingly simple way of thinking about the linguistic representations of bilingual speakers. This article presents a commentary on the MG language acquisition theory proposed by Luiz Amaral and Tom Roeper in this issue, focusing on the theory's implications for child

  13. Comparison of Oxygen-Bomb Combustion with Standard Ignition Techniques for Determining Author(s): William A. Reiners and Norma M. Reiners

    E-print Network

    Thomas, David D.

    Comparison of Oxygen-Bomb Combustion with Standard Ignition Techniques for Determining Total Ash. http://www.jstor.org #12;COMPARISON OF OXYGEN-BOMB COMBUSTION WITH STANDARD IGNITION TECHNIQUES samples by oxygen- bomb combustion and by a simple muffle-furnacetechnique. The influence of using

  14. Cambios en la capacidad del Estado para enfrentar las violaciones de las normas laborales: los talleres de confeccin de prendas de vestir en Buenos Aires

    E-print Network

    Amengual, Matthew

    Developing the capacity for states to enforce labor law is a key challenge to regulating decent work. Dominant accounts of state capacity, however, suggest that the principal components of state enforcement capacity are ...

  15. Two Contrast-Adaptation Processes: One Old, One New Columbia University, Dept of Psychology, New York, NY S. Sabina Wolfson, Norma Graham & Stephanie Pan

    E-print Network

    Columbia University

    Two Contrast-Adaptation Processes: One Old, One New Columbia University, Dept of Psychology, New found a new kind of contrast adaptation: A contrast-comparison-level is continually updated based that of a typical fixation. We have nicknamed this "Buffy adaptation". Here we show how this interacts with an old

  16. Standards for University Libraries = Normes pour les bibliotheques universitaires = Richtwerte fur Universitatsbibliotheken = Normas de bibliotecas universitarias. IFLA Professional Reports No. 10.

    ERIC Educational Resources Information Center

    Lynch, Beverly P., Ed.

    This statement prepared by the International Federation of Library Associations' Section of University Libraries and Other General Research Libraries presents standards of general principles designed to accomplish the following: (1) provide a means by which the quality of the library serving a university can be assessed; (2) offer guidance for

  17. RESOLUO NORMATIVA N. 01/PPGI/2012, DE 21 DE MARO DE 2012. Dispe sobre a as normas para o credenciamento e

    E-print Network

    Floeter, Sergio Ricardo

    credenciamento e recredenciamento de professores no Programa de Ps-Graduao em Letras / Ingls e Literatura / INGLS E LITERATURA CORRESPONDENTE da Universidade Federal de Santa Catarina, no uso de suas atribuies de Ps-Graduao em Letras / Ingls e Literatura Correspondente da Universidade Federal de Santa

  18. BBOOLLLLEETTTTIINNOO NNOOVVIITT NNUUMMEERROO 4499 DDIICCEEMMBBRREE 22000099--GGEENNNNAAIIOO 22001100

    E-print Network

    Enforcement and Human Rights, Cheltenham, Edward Elgar Publishing Limited, 2008. J. BASEDOW, Private Family Law, Portland, Intersentia, 2008. E. CAL, Matrimonio la carte, Milano, Giuffr Editore, 2009. G

  19. Tiragem: 46102 Pas: Portugal

    E-print Network

    Instituto de Sistemas e Robotica

    Amaral, que, nos ltimos anos, "as PPP foram transformadas na maior transferncia de dinheiro pblico Especialista ouvido no Parlamento diz que PPP "foram transformadas em transferncia de dinheiro para a banca

  20. The extent of protist diversity: insights from molecular ecology of freshwater eukaryotes

    E-print Network

    to current ideas, the diversity of freshwater protists is far from being completely described. Keywords. 2003), river sediment (Berney et al. 2004) and one acidic river (Amaral Zettler et al. 2002). In all

  1. Systematic Determination of Replication Activity Type Highlights Interconnections between Replication,

    E-print Network

    Eldar, Yonina

    Systematic Determination of Replication Activity Type Highlights Interconnections between Replication, Chromatin Structure and Nuclear Localization Shlomit Farkash-Amar1. , Yaara David2. , Andreas Agilent Laboratories Tel-Aviv, Israel Abstract DNA replication is a highly regulated process, with each

  2. Indian comics as public culture

    E-print Network

    Das, Abhimnanyu, S.M. Massachusetts Institute of Technology

    2009-01-01

    The Amar Chitra Katha (ACK) series of comic books have, since 1967, dominated the market for domestic comic books in India. In this thesis, I examine how these comics function as public culture, creating a platform around ...

  3. FGSR Council meeting summary, 2006/09/15 Summary Minutes of a Meeting of the

    E-print Network

    Wang, Hao "Howard"

    , Psychiatry N Keating, Human Ecology P Dixon, Psychology N Amaral, Internetworking P Blenis, Renewable Resources J Acker, Lab Medicine & Pathology N Krogman, Rural Economy S O'Byrne, Law W Johnston, Sociology

  4. The effect of the currency movements on stock markets

    E-print Network

    Zohrabyan, Tatevik

    2006-04-12

    nine leading Asian markets for the period from January 1980 to June 1998, Mohsin and Amare (2000) found that whether stock prices are negatively or positively impacted by the exchange rates depends on the time horizon, trade flow elasticity...

  5. Theatre Notes

    E-print Network

    1973-10-01

    matrimonio de los pequeos burgueses Libre-panoramas olvidados Se administra justicia La cesta del buhonero La ms fuerte Eva no estuvo an en el paraso y collage El oso-el aniversario El camalen del pastor Monlogo-Laurencia Poemas y canciones...

  6. Revista Iguanazul, Number 5

    E-print Network

    Santopietro, Judith

    yanna, bichagan xiii Bridxit Bardot. La hija de Brigitte Bardot Un da, la muchacha hija del homosexual Brigitte Bardot, le dijo a su padre que estaba preocupada porque su novio le haba pedido unirse en matrimonio. Pero si es lo mejor...

  7. 2015, Proyecto de Opinin Pblica de Amrica Latina www.AmericasBarometer.org

    E-print Network

    unin civil. En aos recientes, matrimonios entre personas del mismo sexo han sido reconocidos sexo. Por ejemplo, este ao el Congreso peruano finalmente vot en contra de una ley de unin. Como consecuencia, las parejas del mismo sexo pueden registrar sus uniones en la Corte como uniones

  8. En femenino y en masculino

    E-print Network

    Fernndez Pascual, Ricardo

    Espaola" Ministras y mujeres Vestigios de diferencias de gnero en el lxico del matrimonio Una propuesta #12;[5] Introduccin ESTA PUBLICACIN SE ENMARCA EN EL III PLAN PARA LA IGUALDAD DE OPORTUNIDADES ASESORA SOBRE LENGUAJE DEL INSTITUTO DE LA MUJER, DE LOS ORGANISMOS DE IGUALDAD DE DIFERENTES COMUNIDADES

  9. DNA-Mediated Transfer of an RNA Polymerase II Gene: Reversion of the Temperature-Sensitive Hamster Cell Cycle Mutant TsAF8 by Mammalian DNA

    PubMed Central

    Ingles, C. James; Shales, Michael

    1982-01-01

    Treatment of the TsAF8 temperature-sensitive (TS) mutant of Syrian hamster BHK-21 cells, with calcium phosphate precipitates of genomic TS+ DNAs from a variety of mammalian cell lines permitted the selection of TS+ colonies at 40C. TS+ transformation events were distinguished from spontaneous TS+ reversions in experiments in which ?-amanitin-sensitive (AmaS) TS+ DNA was used to transform an AmaR derivative of TsAF8 cells and AmaR TS+ DNA was used to transform AmaS TsAF8 cells. In each case it was possible to demonstrate the unselected acquisition of the appropriate AmaS or AmaR phenotype with the selected TS+ allele. Each of these TS+ transformed cell lines when grown at 40C contained an RNA polymerase II activity with a sensitivity to inhibition by ?-amanitin characteristic of the particular DNA used to transform the TS cells, whereas at 34C the same cells contained a mixture of AmaR and AmaS polymerase II activities. Together, these data provide convincing evidence that the RNA polymerase II gene determining sensitivity to inhibition by ?-amanitin can be transferred to TsAF8 cells and that the TS defect in TsAF8 is a polymerase II mutation. PMID:14582161

  10. Contradictory Information in the Input as the Cause of Multiple Grammars: Predictions for Bilingual Acquisition

    ERIC Educational Resources Information Center

    Unsworth, Sharon

    2014-01-01

    The central claim in Amaral and Roeper's (this issue; henceforth A&R) keynote article is that everyone is multilingual, whether they speak one or more languages. In a nutshell, the idea is that each speaker has multiple grammars or "sub-sets of rules (or sub-grammars) that co-exist". Thus, rather than positing complex rules to

  11. A Genetic Screening Strategy Identifies Novel Regulators of the Proteostasis Network

    E-print Network

    Morimoto, Richard

    Silva1,2 , Susan Fox1 , Monica Beam1,3 , Happy Thakkar1 , Margarida D. Amaral2,4 , Richard I. Morimoto1, and reproduction in any medium, provided the original author and source are credited. Funding: These studies were

  12. Learning English, Learning Science

    ERIC Educational Resources Information Center

    Nelson, Virginia

    2010-01-01

    Using science notebooks effectively in the classroom can encourage students who are learning English to keep up and keep interested. English language proficiency might head the list of content areas that schools can teach properly and effectively through science. Amaral, Garrison, and Klentschy (2002) reported that a successful inquiry-based

  13. Final Report: Fourth Peer Review of the CMAQ Model

    EPA Science Inventory

    The CMAQ Model External Peer Review Panel conducted a two and a half day review view on June 27, 28, and 29, 2011. This report summarizes its findings, and follows other reviews conducted in 2004, 2005, and 2006 [Amar et al., 2004; 2005 and 2007].

  14. Integration of large-scale metabolic, signaling, and gene regulatory networks with application to infection responses

    E-print Network

    Julius, Anak Agung

    Integration of large-scale metabolic, signaling, and gene regulatory networks with application Amar Abstract-- Mathematical models of biochemical networks, such as metabolic, signaling, and gene. In this paper, we describe the integration of large- scale metabolic and signaling networks with a regulatory

  15. (Received, August 2004; Accepted, November 2004) ANTI-MICROBIAL ACTIVITY OF THE ALKALOID EXTRACT OF Genista

    E-print Network

    Par, Paul W.

    OF LUPANINE AND S-CALYCOTOMINE AMAR ZELLAGUI1 , SALAH RHOUATI1 , JOEL CRECHE2 ,GBOR TTH3 , AHMED A. AHMED4, afforded two alkaloids, identified as lupanine (2-oxosparteine) 1 and S-calycotomine 2. The complete 1 H and 13 C chemical shifts assignments of Lupanine and S- Calycotomine were determined using 1D and 2D NMR

  16. Relatrio de Autoavaliao

    E-print Network

    Paran, Universidade Federal do

    , Oramento e Finanas Iwan Augusto Collao - Hospital do Trabalhador Karin Kassmayer - Setor de Cincias - Hospital e Maternidade Victor Ferreira do Amaral Maria Clia Barbosa Aires - Setor de Educao Maria de Cincias Humanas, Letras e Artes Mario Messagi Junior - Setor de Artes, Comunicao e Design Niazy Ramos

  17. Proceedings of the Workshop on BioNLP, pages 6370, Boulder, Colorado, June 2009. c 2009 Association for Computational Linguistics

    E-print Network

    medical treatment terminology (precision: 0.41, recall: 0.52 and F-measure: 0.42). 1 Introduction for Bootstrap Construction of a Medical Treatment Lexicon Rong Xu, Alex Morgan, Amar K Das Biomedical (e.g. dis- eases, medical treatments) are critical source of background knowledge for systems doing

  18. Plenary Talks Talk 1: The Network of Things: People Included

    E-print Network

    Theune, Marit

    :15PM, Utique Room Chairs: Ismail Khalil (Johannes Kepler University Linz - Austria) Chokri Ben Amar@cs.utwente.nl Short Biography: Anton Nijholt started his professional life as a programmer at TNO-Delft. He studied. It occurs in everyday life, but also in sports and entertainment situations. Non-cooperative behavior

  19. Constraining Multiple Grammars

    ERIC Educational Resources Information Center

    Hopp, Holger

    2014-01-01

    This article offers the author's commentary on the Multiple Grammars (MG) language acquisition theory proposed by Luiz Amaral and Tom Roeper in the present issue. Multiple Grammars advances the claim that optionality is a constitutive characteristic of any one grammar, with interlanguage grammars being perhaps the clearest examples of a

  20. The Multiple Grammars Theory and the Nature of L2 Grammars

    ERIC Educational Resources Information Center

    Liceras, Juana M.

    2014-01-01

    This article offers the author's commentary on the Multiple Grammar (MG) language acquisition theory proposed by Luiz Amaral and Tom Roeper in the present issue and touches on other second language acquisition research. Topics discussed include the concept of second language (L2) optionality, a hypothesis regarding the acquisition of the

  1. RESEARCH COMMUNICATIONS CURRENT SCIENCE, VOL. 95, NO. 6, 25 SEPTEMBER 2008 773

    E-print Network

    Columbia University

    pollution. It has been found that leachates originate from solid waste land- fill-contaminated groundwater in Pune city An analysis of air and groundwater pollution Amar M. Dhere1, *, Chandrasekhar B. Pawar2 disposal of solid waste creates many environmental and pollution problems. The 10001200 t of solid waste

  2. Pollen Grain Size, Density, and Settling Velocity for Palmer Amaranth (Amaranthus palmeri)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Palmer amaranth has known resistance to several herbicides, including glyphosate, and there is concern that the resistance traits are being transferred between spatially segregated populations via pollen movement. The objective of this study was to describe the physical properties of Palmer amarant...

  3. Neuronal Reprograming of Protein Homeostasis by Calcium-Dependent Regulation of the Heat Shock

    E-print Network

    Morimoto, Richard

    Neuronal Reprograming of Protein Homeostasis by Calcium-Dependent Regulation of the Heat Shock effect on muscle cell protein homeostasis was identified in an unbiased genome-wide screening health. Citation: Silva MC, Amaral MD, Morimoto RI (2013) Neuronal Reprograming of Protein Homeostasis

  4. BioMed Central Page 1 of 11

    E-print Network

    Lin, Guohui

    BioMed Central Page 1 of 11 (page number not for citation purposes) BMC Genomics Open Access This article is available from: http://www.biomedcentral.com/1471-2164/9/631 2008 Amaral et al; licensee BioMed

  5. 2216 IEEE TRANSACTIONS ON MAGNETICS, VOL. 37, NO. 4, JULY 2001 Magnetic Properties of Cobalt and CobaltPlatinum

    E-print Network

    Spinu, Leonard

    2216 IEEE TRANSACTIONS ON MAGNETICS, VOL. 37, NO. 4, JULY 2001 Magnetic Properties of Cobalt and CobaltPlatinum Alloy Nanoparticles Synthesized Via Microemulsion Technique Amar Kumbhar, Leonard Spinu, Fabrice Agnoli, Kai-Ying Wang, Weilie Zhou, and Charles J. O'Connor Abstract--Metallic cobalt and cobalt

  6. CCR RNA Biology Initiative

    Cancer.gov

    Synthesis and applications of RNAs with position-selective labelling and mosaic composition Yu Liu, Erik Holmstrom, Jinwei Zhang, Ping Yu, Jinbu Wang, Marzena A. Dyba, De Chen, Jinfa Ying, Stephen Lockett, David J. Nesbitt, Adrian R. Ferr-DAmar

  7. NCI Center of Excellence in Chromosome Biology

    Cancer.gov

    Chromosome Structure/Segregation Munira Basrai, Ph.D. Dhruba Chattoraj, Ph.D.Julie Cooper, Ph.D. Yamini Dalal, Ph.D. Shiv Grewal, Ph.D. Alexander Kelly, Ph.D. Amar Klar, Ph.D. Vladimir Larionov, Ph.D. David Levens, M.D., Ph.D. Michael Lichten, Ph.D. Tom M

  8. 77 FR 74266 - In the Matter of the Designation of Ahmed el Tilemsi, Also Known as Ahmed Tilemsi, Also Known as...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-13

    ... Matter of the Designation of Ahmed el Tilemsi, Also Known as Ahmed Tilemsi, Also Known as Abderrahmane Ould el Amar, Also Known as Abderrahmane Toudji, Also Known as Abderrahmane Ouid Ameur, Also Known as... 13284 of January 23, 2003, I hereby determine that the individual known as Ahmed el Tilemsi, also...

  9. Multiple Grammars: Old Wine in Old Bottles

    ERIC Educational Resources Information Center

    Sorace, Antonella

    2014-01-01

    Amaral and Roeper (this issue; henceforth A&R) argue that all speakers -- regardless of whether monolingual or bilingual -- have multiple grammars in their mental language representations. They further claim that this simple assumption can explain many things: optionality in second language (L2) language behaviour, multilingualism, language

  10. 78 FR 70027 - Senior Executive Service; Performance Review Board

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-22

    ...-JOSETTE N. CAMPBELL II, HUGH T. CANNON, SCOTT C. CAPONITI, ALICE K. CAROSINO, ROBERT M. CARR, MICHAEL S.... WAISLEY, SANDRA L. WANDER, WILLIAM T. WARD, GARY K. WARNICK, WALTER L. WARREN, BRADLEY S. WATKINS, EDWARD..., DONALD E. AIYAR, PRIYA R. ALEXANDER, KATHLEEN B. ALLEN, DAVID R. ALLISON, JEFFREY M. AMARAL, DAVID...

  11. 77 FR 64967 - Senior Executive Service; Performance Review Board

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-24

    ...-JOSETTE N CAMPBELL II, HUGH T CANNON, SCOTT C CAROSINO, ROBERT M CARR, MICHAEL S CERVENY, THELMA J CHABAY..., WALTER L WARREN, BRADLEY S WATKINS, EDWARD F WEATHERWAX, SHARLENE C WEIS, MICHAEL J WELLING, DAVID CRAIG..., DONALD E AIYAR, PRIYA R ALEXANDER, KATHLEEN B ALLISON, JEFFREY M AMARAL, DAVID M ANDERSON, CYNTHIA...

  12. International Journal of Computational Intelligence and Applications Vol. 10, No. 3 (2011) 269293

    E-print Network

    Al-Majed, Abdulaziz Abdullah

    2011-01-01

    , and planning future enhanced oil recovery projects. At every stage of the petroleum exploration and production NETWORKS FOR VISCOSITY AND GAS/OIL RATIO CURVES ESTIMATION AMAR KHOUKHI,, MUNIRUDEEN OLOSO,, MOSTAFA University of Petroleum and Minerals, Dhahran, KSA Petroleum Engineering Department King Fahd University

  13. Why Minimal Multiple Rules Provide a Unique Window into UG and L2

    ERIC Educational Resources Information Center

    Amaral, Luiz; Roeper, Tom

    2014-01-01

    This article clarifies some ideas presented in this issue's keynote article (Amaral and Roeper, this issue) and discusses several issues raised by the contributors' comments on the nature of the Multiple Grammars (MG) theory. One of the key goals of the article is to unequivocally state that MG is not a parametric theory and that its

  14. Multiple Grammars and MOGUL

    ERIC Educational Resources Information Center

    Truscott, John

    2014-01-01

    Optionality is a central phenomenon in second language acquisition (SLA), for which any adequate theory must account. Amaral and Roeper (this issue; henceforth A&R) offer an appealing approach to it, using Roeper's Multiple Grammars Theory, which was created with first language in mind but which extends very naturally to SLA. They include

  15. Lunar Sample Compendium C Meyer 2011

    E-print Network

    Rathbun, Julie A.

    (figure 5). They are coherent regolith breccias with dark glassy matrix. Amare basalt clast was dated at 3-85-11511 15265 15265, 15266 and 15267 are coherent breccias containing mare basalt and KREEP basalt clasts photomicrographs can be found in the catalog by Ryder (1985). Significant Clast Basalt Clast Mark et al. (1974

  16. Pesticide Inspector Residential Training September 23 25, 2002

    E-print Network

    Liskiewicz, Maciej

    :30 Course Overview/Objectives Amar Singh EPA HQ 9:30 10:45 Inspections: Neutral Planned Use Agricultural. of Biosystems Engineering Pat Hipkins VTPP 5:30 - 8:00 DINNER DONALDSON BROWN HOTEL AND CONTINUING EDUCATION in Ballroom H for storage and preparation of talks. ** Refreshments are available just outside the meeting

  17. Committee Possible Pgm Appointments Meeting Frequency Last Name First Name Program Program Year (PGY) Medical Executive Committee Any specialty Ten times a year

    E-print Network

    Neimark, Alexander V.

    (PGY) Medical Executive Committee Any specialty Ten times a year Raskin Adam Cardiology Fellow PGY6 Khan Sunniya Internal Medicine PGY3 Darville Rhanda Pediatrics Dixit Amar Internal Medicine PGY2 Medicine PGY3 Niazi Osama Cardiology Fellow PGY4 Graduate Medical Education Committee Any specialty Monthly

  18. nature biotechnology VOLUME 29 NUMBER 5 MAY 2011 415 p e r s p e c t i v e

    E-print Network

    Kelley, Scott

    ,7, Linda Amaral-Zettler8, Jack A Gilbert911, Ilene Karsch-Mizrachi12, Anjanette Johnston12, Guy Cochrane13, Robert Vaughan13, Christopher Hunter13, Joonhong Park14, Norman Morrison3,15, Philippe Rocca-Serra16

  19. Wavelet Lifting for Speckle Noise Reduction in Ultrasound Images

    E-print Network

    Raheja, Amar

    Wavelet Lifting for Speckle Noise Reduction in Ultrasound Images Yuan Chen, and Amar Raheja be used by medical experts to balance the relevant image feature preservation and the speckle noise, wavelet lifting. I. INTRODUCTION Ultrasonic imaging suffers speckle noise problems because of energy

  20. ISSN: 1524-4539 Copyright 2000 American Heart Association. All rights reserved. Print ISSN: 0009-7322. Online

    E-print Network

    Stanley, H. Eugene

    . Moody, Chung-Kang Peng and Ary L. Goldberger, Luis A. N. Amaral, Leon Glass, Jeffrey M. HausdorffD; Leon Glass, PhD; Jeffrey M. Hausdorff, PhD; Plamen Ch. Ivanov, PhD; Roger G. Mark, MD, PhD; Joseph E-source software for analyzing them. It provides facilities for the cooperative analysis of data and the evaluation

  1. 75 FR 32869 - Endangered and Threatened Wildlife and Plants; 90-Day Finding on a Petition To List a Distinct...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-10

    ...petition to list a Distinct Population Segment (DPS) of the...hours, at the U.S. Fish and Wildlife Service...or Michael Amaral, Fish and Wildlife Supervisory...Northeastern Gray Wolf Distinct Population Segment consisting of...Northeastern Gray Wolf Recovery Plan. The request...

  2. To appear in the ACM SIGGRAPH conference proceedings Generalized Wavelet Product Integral for Rendering Dynamic Glossy Objects

    E-print Network

    Mukherjee, Amar

    for Rendering Dynamic Glossy Objects Weifeng Sun Amar Mukherjee University of Central Florida Abstract We, interactively rendering dynamic high-glossy objects with re- alistic shadows still remains a challenging problem consider realtime rendering of dynamic glossy objects with re- alistic shadows under distant all

  3. To appear in the ACM SIGGRAPH conference proceedings Generalized Wavelet Product Integral for Rendering Dynamic Glossy Objects

    E-print Network

    Mukherjee, Amar

    for Rendering Dynamic Glossy Objects Weifeng Sun Amar Mukherjee University of Central Florida Abstract We consider real-time rendering of dynamic glossy objects with re- alistic shadows under distant all for cast shadows on high-glossy objects occluded by dynamic neighbors. In this paper, we extend dou- ble

  4. Extratropical Tropopause Transition Layer Characteristics from High-Resolution Sounding Data

    E-print Network

    Homeyer, Cameron R.

    2011-08-08

    KGGW (Glasgow, Montana) and pro le (b) is from KMFL (Miami, Florida). Observations are shown at 100 m sub-sampling. : : 38 7 Average power of Fourier Transforms of static stability N as a function of wavelength for 200 soundings from KAMA (Amar...

  5. The Composition of the Soils of the Texas Panhandle.

    E-print Network

    Fraps, G. S.

    1915-01-01

    AmarHlo sanclv loam. depth 0-R incbes; reddish brown fine sandy loam; " 5-! miles south of Canyon City. 18 TEXAS AGRICULTURAL EXPERIMENT STATION. 2445 Allmial soil, depth 0-8 inches_; gniy brown loam; 1 mile west of Canyon City. 2449 Subsoil to 244...

  6. Performance of Quantized Congestion Notification in TCP Incast in Data Centers

    E-print Network

    Devkota, Prajjwal Prasad

    2011-08-08

    and support. I would like to thank the Parallel Data Laboratory of Carnegie Mellon University, in particular Amar Phanishayee, for having made their ns-2 simulation code available, and Rong Pan and Dr. Balaji Prabhakar for o ering suggestions during our...

  7. El lenguaje de las flores y la extraa en La hija de las flores de Gertrudis Gmez de Avellaneda

    E-print Network

    Rivera, Angel A.

    1998-10-01

    conflicto que aqueja a los personajes. Luego se revela en escena que Flora es en realidad hija de Beatriz y del Conde. Se descubre que el Conde haba violado a Beatriz cuando ella era joven, siendo Flora el producto. El da de la violacin, Beatriz..., e inclusive literarios, como la violacin y el matrimonio arreglado, son resueltos de formas distintas por las nuevas generaciones, ejemplificado en Flora y Luis. Mientras que Beatriz se adapta y configura a modos tradicionales de representacin...

  8. Nutriendo la Promesa: Materiales Para la Aplicacion de las Normas de Ejecucion del Programa Head Start. Guia Para la Utilizacion de los Materiales [y] Transparencias (Nurturing the Promise: Set of Training Materials on the Head Start Program Performance Standards. User's Guide [and] Set of Transparencies).

    ERIC Educational Resources Information Center

    Educational Services, Inc., Washington, DC.

    Since 1975, the Head Start Program Performance Standards have defined the services that local programs are required to provide to enrolled children and families. With revisions effective in 1998, the Program Performance Standards translate the Head Start vision into quality practices implemented at the local level. This document is comprised of a

  9. Orchids along transects II & IV of the Inter-Oceanic Highway. Photos by Q. Lake, RM-Roman-Cuesta, W. Nauray. Oxford University Expedition 2008. Members: David Rueger, Theresa Meacham, Quintin Lake, Norma Salinas, William Nauray, Rosa Maria Romana.Botanica

    E-print Network

    Orchids along transects II & IV of the Inter-Oceanic Highway. Photos by Q. Lake, RM-Roman-Cuesta, W) Dalstrm 12.Cyclopogon sp1. 13.Cyclopogon sp2. 14.Cyclopogon sp3. 15.Dichaea sp. #12;Orchids along? Dodson & R. Vsquez #12;Orchids along transects II & IV of the Inter-Oceanic Highway. Photos by Q. Lake

  10. Para Candidatos en Programas de Centros de Cuidado y Educacion Infantil con Bebes y "Toddlers": Asociado en Desarrollo Infantil Sistema de Evaluacion y Normas de Competencia CDA (Infant/Toddler Caregivers in Center-Based Programs: The Child Development Associate Assessment System and Competency Standards).

    ERIC Educational Resources Information Center

    Council for Early Childhood Professional Recognition, Washington, DC.

    This Spanish-language booklet outlines the requirements of the Child Development Associate (CDA) credential for caregivers working in center-based infant and toddler day care programs. Part 1 provides an overview of the CDA credentialing system and the various options, settings, standards, and stages of the CDA assessment system. Part 2 explains

  11. Para Candidatos en Programas de Centros de Cuidado y Educacion Infantil con Ninos de Edad Pre-escolar: Asociado en Desarrollo Infantil Sistema de Evaluacion y Normas de Competencia CDA (Preschool Caregivers in Center-Based Programs: The Child Development Associate Assessment System and Competency Standards).

    ERIC Educational Resources Information Center

    Council for Early Childhood Professional Recognition, Washington, DC.

    This Spanish-language booklet outlines the requirements of the Child Development Associate (CDA) credential for preschool teachers or caregivers who work in center-based preschool day care programs. Part 1 provides an overview of the CDA credentialing system and the various options, settings, standards, and stages of the CDA assessment system.

  12. Latin American Theatre Review, Volume 23, Number 2: Recent Publications, Materials Received and Current Bibliography

    E-print Network

    1990-04-01

    review.] Abreu Felippe, Jos. Amar as. Miami: Ediciones Universal, 1988. 46 p. Acosta, Ivn. Un cubiche en la luna: tres obras teatrales. Houston: Arte Pblico Press, 1989. 128 p. Alberdi, Jaime. Curso intensivo de teatro con siete obras.... Bogot: Arango Editores, 1988. 77 p. Ott, Gustavo. Teatro. Caracas: Textoteatro Ediciones, 1988. 264 p. Incluye: Onda media, Pavlov: El perro y la campana, La mujer del diputado, Los peces crecen con la luna, Passport, y una introduccin por Carlos...

  13. Identification and Characterization of the Androgen Receptor From the American Alligator, Alligator mississippiensis.

    PubMed

    Miyagawa, Shinichi; Yatsu, Ryohei; Kohno, Satomi; Doheny, Brenna M; Ogino, Yukiko; Ishibashi, Hiroshi; Katsu, Yoshinao; Ohta, Yasuhiko; Guillette, Louis J; Iguchi, Taisen

    2015-08-01

    Androgens are essential for the development, reproduction, and health throughout the life span of vertebrates, particularly during the initiation and maintenance of male sexual characteristics. Androgen signaling is mediated by the androgen receptor (AR), a member of the steroid nuclear receptor superfamily. Mounting evidence suggests that environmental factors, such as exogenous hormones or contaminants that mimic hormones, can disrupt endocrine signaling and function. The American alligator (Alligator mississippiensis), a unique model for ecological research in that it exhibits environment-dependent sex determination, is oviparous and long lived. Alligators from a contaminated environment exhibit low reproductive success and morphological disorders of the testis and phallus in neonates and juveniles, both associated with androgen signaling; thus, the alterations are hypothesized to be related to disrupted androgen signaling. However, this line of research has been limited because of a lack of information on the alligator AR gene. Here, we isolated A mississippiensis AR homologs (AmAR) and evaluated receptor-hormone/chemical interactions using a transactivation assay. We showed that AmAR responded to all natural androgens and their effects were inhibited by cotreatment with antiandrogens, such as flutamide, p,p'-dichlorodiphenyldichloroethylene, and vinclozolin. Intriguingly, we found a spliced form of the AR from alligator cDNA, which lacks seven amino acids within the ligand-binding domain that shows no response to androgens. Finally, we have initial data on a possible dominant-negative function of the spliced form of the AR against androgen-induced AmAR. PMID:25974402

  14. Seminario de Monopolos, 23.5.* Compacticidad del espacio de soluciones de las ecuaciones de Seiberg-Witten.

    E-print Network

    Bor, Gil

    , a = ae + ah + ae*, donde ae es la parte exacta (en la imagen de d), ah la parte harmonica (en acotar la parte harmonica ah. Paso II. Transformar por norma para anhiquilar la parte exacta ae. Paso III denotar la norma en L2. I. Sea Harm1(M) el espacio de 1-formas harmonicas en M, y Harm1(M) el latice

  15. El Odin Teatret y Latinoamrica

    E-print Network

    de Toro, Fernando

    1988-10-01

    prctica teatral misma, en el empleo de la mscara, de la gestual, de la voz y particularmente de la energa que comunica el actor a su receptor, la forma de entregar el discurso (pensemos en El evangelio de Oxyrhincus, Esperando el alba, Matrimonio con... como qued ampliamente demostrado en el Encuentro de Baha Blanca. ///. Teatro e identidad No pensamos que la identidad, tal como la propone Barba, pueda situarse simplemente a nivel de un tipo de entrenamiento y de energa, que nos parecen ms...

  16. GIANT: A Cytoscape Plugin for Modular Networks

    PubMed Central

    Cumbo, Fabio; Paci, Paola; Santoni, Daniele; Di Paola, Luisa; Giuliani, Alessandro

    2014-01-01

    Network analysis provides deep insight into real complex systems. Revealing the link between topological and functional role of network elements can be crucial to understand the mechanisms underlying the system. Here we propose a Cytoscape plugin (GIANT) to perform network clustering and characterize nodes at the light of a modified Guimer-Amaral cartography. This approach results into a vivid picture of the a topological/functional relationship at both local and global level. The plugin has been already approved and uploaded on the Cytoscape APP store. PMID:25275465

  17. BoseEinstein correlations of ?^0 pairs from hadronic Z^0 decays

    E-print Network

    Wilson, Graham Wallace; OPAL Collaboration; Abbiendi, G.; Ainsley, C.; Å kesson, P.F.; Alexander, G.; Allison, J.; Amaral, P.; Anagnostou, G.; Anderson, K.J.; Arcelli, S.; Asai, S.; Axen, D.

    2003-05-01

    .F. kesson c, G. Alexander u, J. Allison o, P. Amaral h, . Anagnostou a, K.J. Anderson h, S. Arcelli b, S. Asai v, D. Axen z, G. Azuelos q,1, . Bailey y, E. Barberio g,16, R.J. Barlow o, R.J. Batley e, P. Bechtle x, T. Behnke x, . Bell s, P.J. Bell a, G.... Lett. B 197 (1987) 443; M. Suzuki, Phys. Rev. D 35 (1987) 3359; M. Biyajima, et al., Phys. Rev. C 58 (1998) 2316; G. Alexander, H.J. Lipkin, Phys. Lett. B 456 (1999) 270. [13] OPAL Collaboration, K. Ahmet, et al., Nucl. Instrum. Methods A 305 (1991) 275...

  18. The merchant of Genoa : the Crusades, the Genoese and the Latin East, 1187-1220s

    E-print Network

    Mack, Merav

    2003-10-07

    thus used in this research. This broad view of Genoa's commercial activities opens tip the opportunity to track the career of individuals before, during, and after the crusades. It also enables the recognition of changes in travel routes... tj* F1617 it Johannes de Pontremolo LQJ xl -8x Cakrda ABC0EF GH K notry a act- MSS date skN a num Oonw pernYSNOn aM/ar sidey d camae desctiptlon bet s " " " Oberto Sabe 1190 271 2s1 , 11N MabUs tuta earn third etttsede, sep Rau. Tebatdo...

  19. Genetics Research Discovered in a Bestseller | Poster

    Cancer.gov

    By Nancy Parrish, Staff Writer One morning in early January, Amar Klar sat down at his computer and found an e-mail with a curious message from a colleague. While reading a bestselling novel, The Marriage Plot by Jeffrey Eugenides, his colleague, a professor at Princeton University, found a description of research on yeast genetics that was surprisingly similar to Klars early research. Even the laboratory in the novel was reminiscent of Cold Spring Harbor Laboratory, where Klar had conducted his research.

  20. Asteroids Observed from GMARS and Santana Observatories: 2011 October- December

    NASA Astrophysics Data System (ADS)

    Stephens, Robert D.

    2012-04-01

    Lightcurves of six asteroids were obtained from Santana Observatory and Goat Mountain Astronomical Research Station (GMARS): 555 Norma, 1028 Lydina, 1123 Shapleya, 1178 Irmela, 3436 Ibadinov, and 6042 Cheshirecat.

  1. Desde 1889 Barnard College ha sido reconocida como lder en el campo de la educacin superior para mujeres. La diversidad de nuestra comunidad intelectual y un ambiente

    E-print Network

    cuotas por solicitud de admisin a escuelas de posgrado. Programa acadmico de verano: El verano anterior norma asegura que familias de todo tipo de situacin econmica puedan costear su educacin en Barnard

  2. ANALYSIS OF HYDROPONIC FERTILIZER MATRIXES FOR PERCHLORATE: COMPARISON OF ANALYTICAL TECHNIQUES

    EPA Science Inventory

    Seven retail hydroponic nitrate fertilizer products, two liquid and five solid, were comparatively analyzed for the perchlorate anion (ClO4-) by ion chromatography (IC) with suppressed conductivity detection, complexation electrospray ionization mass spectrometry (cESI-MS), norma...

  3. VERBALE DEI LAVORI DELLA COMMISSIONE GIUDICATRICE DELLA PROCEDURA DI VALUTAZIONE COMPARATIVA PER LA COPERTURA DI N. 1 POSTO DI RICERCATORE

    E-print Network

    Di Pillo, Gianni

    pienamente legittimata ad operare secondo norma. La Commissione procede alla nomina del Presidente sottraendo, nel caso di candidate, un anno per ogni figlio) -Indici bibliometrici (allegato C del bando) non

  4. Cul es la apariencia de un ambiente seguro para dormir?

    E-print Network

    Rau, Don C.

    silla. *Para obtener ms informacin sobre las normas de seguridad de las cunas, llame gratis a la sueo. Su beb no debe dormir solo ni acompaado en una cama de adultos, un sof o una silla. Mantenga

  5. FACTORS AFFECTING SENSITIVITY OF CHEMICAL AND ECOLOGICAL RESPONSES OF MARINE EMBAYMEMTS TO NITROGEN LOADING

    EPA Science Inventory

    This paper summarizes an ongoing examination of the primary factors that affect sensitivity of marine embayment responses to nitrogen loading. Included is a discussion of two methods for using these factors: classification of embayments into discrete sensitivity classes and norma...

  6. UNIVERSIDADE FEDERAL DO PARAN Curso de Medicina Veterinria

    E-print Network

    Paran, Universidade Federal do

    UNIVERSIDADE FEDERAL DO PARAN Curso de Medicina Veterinria NORMAS PARA ELABORAO DE TRABALHO DE CONCLUSO DE CURSO CURITIBA 2008 #12;1 SUMRIO CURITIBA................................................................................................................................. 1 1. FORMATAO DO TRABALHO DE CONCLUSO DE CURSO........................... 2 1.1 Impresso

  7. Corso di Laurea in Ingegneria Informatica e dell'Automazione Anno Accademico 2011/2012

    E-print Network

    Demeio, Lucio

    norma infinito uti- lizzando i metodi iterativi di Jacobi e Gauss-Seidel, indicando in ciascun caso il infinito uti- lizzando i metodi iterativi di Jacobi e Gauss-Seidel, indicando in ciascun caso il numero di

  8. Kitchen-Tested Recipes for Reading and Writing Poetry (Modern Poetry in the Classroom).

    ERIC Educational Resources Information Center

    Vogel, Mark; Tilley, Janet

    1994-01-01

    Provides an account of how one English teacher fosters student appreciation of poetry by using poems dealing consistently with one theme: family relationships. Discusses student response to several poems used, including "A Daughter's House" by Norma Hope Richman. (HB)

  9. RReessoolluucciinn RReeccttoorraall RReegguullaaddoorraa ddee llaass NNoorrmmaass ddee

    E-print Network

    Bilbao Arrese, Jess Mario

    RESOLUCIN RECTORAL REGULADORA DE LAS NORMAS DE MATRCULA EN LICENCIATURAS, DIPLOMATURAS, ARQUITECTURA, ARQUITECTURA TCNICA, INGENIERAS, INGENIERAS TCNICAS Y MAESTRO TTULO PRELIMINAR: DISPOSICIONES GENERALES, incluyendo su rgimen acadmico y econmico, de las Licenciaturas, Diplomaturas, Arquitectura, Arquitectura

  10. Latin American Theatre Review, Volume 17, Number 1: Back Matter

    E-print Network

    1983-10-01

    concernente matria; bibliografias, iconografias, discografias, filmografias, a relatos sobre colees de manuscritos e livros raros. Manuscritos (somente cpia original) podem ser submetidos em ingls, espanhol, ou portugus, e devem obedecer as normas... concernente matria; bibliografias, iconografias, discografias, filmografias, a relatos sobre colees de manuscritos e livros raros. Manuscritos (somente cpia original) podem ser submetidos em ingls, espanhol, ou portugus, e devem obedecer as normas...

  11. Adaptation of abbreviated mathematics anxiety rating scale for engineering students

    NASA Astrophysics Data System (ADS)

    Nordin, Sayed Kushairi Sayed; Samat, Khairul Fadzli; Sultan, Al Amin Mohamed; Halim, Bushra Abdul; Ismail, Siti Fatimah; Mafazi, Nurul Wirdah

    2015-05-01

    Mathematics is an essential and fundamental tool used by engineers to analyse and solve problems in their field. Due to this, most engineering education programs involve a concentration of study in mathematics courses whereby engineering students have to take mathematics courses such as numerical methods, differential equations and calculus in the first two years and continue to do so until the completion of the sequence. However, the students struggled and had difficulties in learning courses that require mathematical abilities. Hence, this study presents the factors that caused mathematics anxiety among engineering students using Abbreviated Mathematics Anxiety Rating Scale (AMARS) through 95 students of Universiti Teknikal Malaysia Melaka (UTeM). From 25 items in AMARS, principal component analysis (PCA) suggested that there are four mathematics anxiety factors, namely experiences of learning mathematics, cognitive skills, mathematics evaluation anxiety and students' perception on mathematics. Minitab 16 software was used to analyse the nonparametric statistics. Kruskal-Wallis Test indicated that there is a significant difference in the experience of learning mathematics and mathematics evaluation anxiety among races. The Chi-Square Test of Independence revealed that the experience of learning mathematics, cognitive skills and mathematics evaluation anxiety depend on the results of their SPM additional mathematics. Based on this study, it is recommended to address the anxiety problems among engineering students at the early stage of studying in the university. Thus, lecturers should play their part by ensuring a positive classroom environment which encourages students to study mathematics without fear.

  12. Geology and metallogeny of the Ar Rayn terrane, eastern Arabian shield: Evolution of a Neoproterozoic continental-margin arc during assembly of Gondwana within the East African orogen

    USGS Publications Warehouse

    Doebrich, J.L.; Al-Jehani, A. M.; Siddiqui, A.A.; Hayes, T.S.; Wooden, J.L.; Johnson, P.R.

    2007-01-01

    The Neoproterozoic Ar Rayn terrane is exposed along the eastern margin of the Arabian shield. The terrane is bounded on the west by the Ad Dawadimi terrane across the Al Amar fault zone (AAF), and is nonconformably overlain on the east by Phanerozoic sedimentary rocks. The terrane is composed of a magmatic arc complex and syn- to post-orogenic intrusions. The layered rocks of the arc, the Al Amar group (>689 Ma to ???625 Ma), consist of tholeiitic to calc-alkaline basaltic to rhyolitic volcanic and volcaniclastic rocks with subordinate tuffaceous sedimentary rocks and carbonates, and are divided into an eastern and western sequence. Plutonic rocks of the terrane form three distinct lithogeochemical groups: (1) low-Al trondhjemite-tonalite-granodiorite (TTG) of arc affinity (632-616 Ma) in the western part of the terrane, (2) high-Al TTG/adakite of arc affinity (689-617 Ma) in the central and eastern part of the terrane, and (3) syn- to post-orogenic alkali granite (607-583 Ma). West-dipping subduction along a trench east of the terrane is inferred from high-Al TTG/adakite emplaced east of low-Al TTG. The Ar Rayn terrane contains significant resources in epithermal Au-Ag-Zn-Cu-barite, enigmatic stratiform volcanic-hosted Khnaiguiyah-type Zn-Cu-Fe-Mn, and orogenic Au vein deposits, and the potential for significant resources in Fe-oxide Cu-Au (IOCG), and porphyry Cu deposits. Khnaiguiyah-type deposits formed before or during early deformation of the Al Amar group eastern sequence. Epithermal and porphyry deposits formed proximal to volcanic centers in Al Amar group western sequence. IOCG deposits are largely structurally controlled and hosted by group-1 intrusions and Al Amar group volcanic rocks in the western part of the terrane. Orogenic gold veins are largely associated with north-striking faults, particularly in and near the AAF, and are presumably related to amalgamation of the Ar Rayn and Ad Dawadimi terranes. Geologic, structural, and metallogenic characteristics of the Ar Rayn terrane are analogous to the Andean continental margin of Chile, with opposite subduction polarity. The Ar Rayn terrane represents a continental margin arc that lay above a west-dipping subduction zone along a continental block represented by the Afif composite terrane. The concentration of epithermal, porphyry Cu and IOCG mineral systems, of central arc affiliation, along the AAF suggests that the AAF is not an ophiolitic suture zone, but originated as a major intra-arc fault that localized magmatism and mineralization. West-directed oblique subduction and ultimate collision with a land mass from the east (East Gondwana?) resulted in major transcurrent displacement along the AAF, bringing the eastern part of the arc terrane to its present exposed position, juxtaposed across the AAF against a back-arc basin assemblage represented by the Abt schist of the Ad Dawadimi terrane. Our findings indicate that arc formation and accretionary processes in the Arabian shield were still ongoing into the latest Neoproterozoic (Ediacaran), to about 620-600 Ma, and lead us to conclude that evolution of the Ar Rayn terrane (arc formation, accretion, syn- to postorogenic plutonism) defines a final stage of assembly of the Gondwana supercontinent along the northeastern margin of the East African orogen. ?? 2007 Elsevier B.V. All rights reserved.

  13. Flash Updates of GSC projects (GSC8 Meeting)

    ScienceCinema

    Glockner, Frank Oliver; Markowitz, Victor; Kyrpides, Nikos; Meyer, Folker; Amaral-Zettler, Linda; Cole, James

    2011-04-29

    The Genomic Standards Consortium was formed in September 2005. It is an international, open-membership working body which promotes standardization in the description of genomes and the exchange and integration of genomic data. The 2009 meeting was an activity of a five-year funding Research Coordination Network from the National Science Foundation and was organized held at the DOE Joint Genome Institute with organizational support provided by the JGI and by the University of California - San Diego. In quick succession Frank Oliver Glockner (MPI-Bremen), Victor Markowitz (LBNL), Nikos Kyripides (JGI), Folker Meyer (ANL), Linda Amaral-Zettler (Marine Biology Lab), and James Cole (Michigan State University) provide updates on a number of topics related to GSC projects at the Genomic Standards Consortium 8th meeting at the DOE JGI in Walnut Creek, Calif. on Sept. 9, 2009.

  14. Flash Updates of GSC projects (GSC8 Meeting)

    SciTech Connect

    Glockner, Frank Oliver; Markowitz, Victor; Kyrpides, Nikos; Meyer, Folker; Amaral-Zettler, Linda; Cole, James

    2009-09-09

    The Genomic Standards Consortium was formed in September 2005. It is an international, open-membership working body which promotes standardization in the description of genomes and the exchange and integration of genomic data. The 2009 meeting was an activity of a five-year funding Research Coordination Network from the National Science Foundation and was organized held at the DOE Joint Genome Institute with organizational support provided by the JGI and by the University of California - San Diego. In quick succession Frank Oliver Glockner (MPI-Bremen), Victor Markowitz (LBNL), Nikos Kyripides (JGI), Folker Meyer (ANL), Linda Amaral-Zettler (Marine Biology Lab), and James Cole (Michigan State University) provide updates on a number of topics related to GSC projects at the Genomic Standards Consortium 8th meeting at the DOE JGI in Walnut Creek, Calif. on Sept. 9, 2009.

  15. Experimental studies of unbiased gluon jets from e^+e^? annihilations using the jet boost algorithm

    E-print Network

    Wilson, Graham Wallace; Abbiendi, G.; Ainsley, C.; Å kesson, P. F.; Alexander, G.; Allison, J.; Amaral, P.; Anagnostou, G.; Anderson, K.J.; Arcelli, S.; Asai, S.; Axen, D.; Azuelos, G.; Bailey, I.; Barberio, E.

    2004-02-25

    PHYSICAL REVIEW D 69, 032002 ~2004!Experimental studies of unbiased gluon jets from ee annihilations using the jet boost algorithm G. Abbiendi,2 C. Ainsley,5 P. F. kesson,3,a G. Alexander,22 J. Allison,16 P. Amaral,9 G. Anagnostou,1 K. J. Anderson,9 S...,21 A. De Roeck,8 E.A. De Wolf,8,d K. Desch,25 B. Dienes,30 M. Donkers,6 J. Dubbert,31 E. Duchovni,24 G. Duckeck,31 I. P. Duerdoth,16 E. Etzion,22 F. Fabbri,2 L. Feld,10 P. Ferrari,8 F. Fiedler,31 I. Fleck,10 M. Ford,5 A. Frey,8 A. Furtjes,8 P. Gagnon...

  16. Fast quantification of proton magnetic resonance spectroscopic imaging with artificial neural networks

    NASA Astrophysics Data System (ADS)

    Bhat, Himanshu; Sajja, Balasrinivasa Rao; Narayana, Ponnada A.

    2006-11-01

    Accurate quantification of the MRSI-observed regional distribution of metabolites involves relatively long processing times. This is particularly true in dealing with large amount of data that is typically acquired in multi-center clinical studies. To significantly shorten the processing time, an artificial neural network (ANN)-based approach was explored for quantifying the phase corrected (as opposed to magnitude) spectra. Specifically, in these studies radial basis function neural network (RBFNN) was used. This method was tested on simulated and normal human brain data acquired at 3T. The N-acetyl aspartate (NAA)/creatine (Cr), choline (Cho)/Cr, glutamate + glutamine (Glx)/Cr, and myo-inositol (mI)/Cr ratios in normal subjects were compared with the line fitting (LF) technique and jMRUI-AMARES analysis, and published values. The average NAA/Cr, Cho/Cr, Glx/Cr and mI/Cr ratios in normal controls were found to be 1.58 0.13, 0.9 0.08, 0.7 0.17 and 0.42 0.07, respectively. The corresponding ratios using the LF and jMRUI-AMARES methods were 1.6 0.11, 0.95 0.08, 0.78 0.18, 0.49 0.1 and 1.61 0.15, 0.78 0.07, 0.61 0.18, 0.42 0.13, respectively. These results agree with those published in literature. Bland-Altman analysis indicated an excellent agreement and minimal bias between the results obtained with RBFNN and other methods. The computational time for the current method was 15 s compared to approximately 10 min for the LF-based analysis.

  17. Antimicrobial Efficacy of Ten Commercially Available Herbal Dentifrices against Specific Oral Microflora In Vitro Study

    PubMed Central

    Reddy, Padma; Hemalatha; Reddy, Srikanth; Doshi, Dolar; Kulkarni, Suhas; Kumar, Manoj

    2015-01-01

    Aim: To determine and compare the antimicrobial efficacy of ten commercially available herbal dentifrices against specific strains of oral microflora using a standard diffusion method at full strength and 1:1 dilution at 24 h. Materials and Methods: The standard strains of Streptococcus. mutans (ATCC 21293), Streptococcus sangius (MTCC 442), Actinomyces viscosus (ATCC 3268), Staphylococcus aureus (ATCC 2592), Streptococcus pyogenes (MTCC 442) and Candida albicans (ATCC 183) were obtained. Antimicrobial efficacy of the dentifrices was tested in triplicate, at full strength and 1:1 dilution with the sterile water using a standard diffusion method for 24 h at 37C. The antimicrobial efficacy was tested by observing the zones of inhibition in millimeters surrounding disk containing the dentifrice. Mean standard deviation and standard error of mean of the inhibitory zones was calculated for each herbal dentifrice. p<0.05 was considered statistically significant. Results: Danth Kanthi (DK) was the most effective against all the microorganisms producing larger zones of inhibition at 24 h (F.S 401.5; 1:1 dilution 402.71). Amar Premium (AP) also produced larger zones of inhibition against all microorganisms except S. aureus. Of all the dentifrices, least zones of inhibitions i.e., around 5 mm was observed against S. aureus by Amar Premium (AP) and Dabur Babool (DB) at 24 h. Conclusion: Based on the results of the present study, it can be concluded that all herbal dentifrices exhibited antimicrobial activity against the selected oral microorganisms, with DK being the most effective. Hence, it can be inferred that herbal dentifrices can also be recommended like the conventional formulations. PMID:26023642

  18. Integration of CC, IAQ, and EM for an Optimum and Proactive Energy Performance at Alamo Colleges, San Antonio, Texas.

    E-print Network

    Rangel, N.; O'Neal, S.; Martinez, J.; Strybos, J.

    2012-01-01

    ?, IAQ, and EM for an Optimum and Proactive Energy Performance at Alamo Colleges, San Antonio, Texas. Norma L. Rangel, Stephen O?Neal, and Joseph T. Martinez; Energy Systems Laboratory John W. Strybos Alamo Colleges Energy Systems Laboratory A..., Facilities Foreman and HVAC Foreman Energy Systems Laboratory PI: Joseph Martinez, PCC. Ian Nelson (PhD student) Agnes Almeida (MSc student) Ahmet Ugursal, PhD Norma Rangel, PhD Juan-Carlos Baltazar, PhD Alaina Jones (PhD student) Energy Management...

  19. Flow laws for glacier ice: comparison of numerical predictions and field measurements

    E-print Network

    van der Veen, Cornelis J.; Whillans, I. M.

    1990-10-05

    , but appropriate deviatoric normal stresses may develop to oppose this tendency. Two papers that discuss models incorporating norma] stress effects into glaciology are those of McTigue and others (]985) and Man and Sun (1987). The former study adopted as a... than to include norma] stress effects resulting from anisotropic behavior. McTigue and others (1985) asserted normal stress effects may affect the shape of the free surface of a glacier in an open channel, and may account for a depression of more than...

  20. CAT FLEA -CTENOCEPHALIDES FELIS adult female

    E-print Network

    CAT FLEA - CTENOCEPHALIDES FELIS adult female l'lletepimeron (slJppla.ntlng obdomlnal sternite I--' -Pygidium Femur Tibia Plantar .168 FLEA DIAGRAM - WITH STRUCTURES LABELED Harry D. Pratt #12;FLEAS of Fronl maroln I of head round.d head onoulor Thorol normaI Thoral conlracl.d STICKTIGHT FLEA Echldll

  1. Historia de la Matematica en el Siglo XX Real Academia de Ciencias Exactas, Fisicas y Naturales (1998), 43-61

    E-print Network

    Gmez Villegas, Miguel ngel

    1998-01-01

    familia se dedicaba a los negocios 1 #12;pero el rompio la norma. Acudio a la escuela en Stanmore y de hacer el servicio militar por su vista y entre 1915 y 1919 se dedico a la ense~nanza en escuelas

  2. Politicas del Bienestar del Programa de Dasarrollo Infantil Callier

    E-print Network

    O'Toole, Alice J.

    familias, el Programa de Desarrollo Infantil Callier busca promover la salud de los nios a travs de Departamento de la Familia y de Proteccin de las Normas Mnimas para el cuidado infantil Saludable y Activo nutricional se proporciona a las familias a travs de carteles, pizarras de anuncios, y en los eventos

  3. Florida Atlantic University University Graduate Council (UGC)

    E-print Network

    Fernandez, Eduardo

    : Deborah L. Floyd, Education; Ronald Nyhan, CDSI; Ali Zilouchian, Engineering; Charles Roberts, Science and Letters Others Present: Barry Rosson, Graduate College; Barbara Bebergal, Division of Research; Susan Fulks, Graduate College; Nancy Diamond, Graduate College; Mary Jane Pica, Division of Research; Norma

  4. Using Adolescent Fiction That Deals with Current Problems and Lifestyles to Explore Contemporary Values.

    ERIC Educational Resources Information Center

    Schwartz, Sheila

    This paper argues that a value structure must be developed and taught in the schools. The values and principles contained in the Humanistic Manifesto II are examined in the context of current adolescent literature. Discussed are such books as "It's Not What You Expect" and "Mom, The Wolfman and Me" by Norma Klein; "First Person Singular" by Vida

  5. The Voices of Cultural Assimilation in Current Young Adult Novels.

    ERIC Educational Resources Information Center

    Angel, Ann

    2003-01-01

    Presents three renowned writers who have chosen from diverse genres to tell immigrant tales through memoir, contemporary vignettes, and historical fiction. Notes that each author captures very real adolescent voices and their stories. Discusses Frank McCourt's "Angela's Ashes," An Na's "A Step form Heaven," and Norma Fox Mazer's "Goodnight Maman."

  6. Analysis of HRCT-derived xylem network reveals reverse flow in some vessels

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Flow in xylem vessels is modeled based on constructions of three dimensional xylem networks derived from High Resolution Computed Tomography (HRCT) images of grapevine (Vitis vinifera) stems. Flow in 6-14% of the vessels was found to be oriented in the opposite direction to the bulk flow under norma...

  7. Deconstructing Gender Stereotyping through Literature in L2

    ERIC Educational Resources Information Center

    Yulita, Leticia

    2010-01-01

    While it is generally accepted that literature fosters (inter)cultural learning, few qualitative studies have sought to understand in what ways interculturality is developed. This article investigates the development of Spanish L2 students' intercultural awareness through the reading of a short story entitled "Norma y Ester" by Argentine writer,

  8. GALAXY CLUSTERS IN THE SWIFT /BAT ERA. II. 10 MORE CLUSTERS DETECTED ABOVE 15 keV

    E-print Network

    Ajello, M.

    We report on the discovery of 10 additional galaxy clusters detected in the ongoing Swift/Burst Alert Telescope (BAT) all-sky survey. Among the newly BAT-discovered clusters there are Bullet, A85, Norma, and PKS 0745-19. ...

  9. Un Programa de Limpieza Verde para Instalaciones en Connecticut Legislacin

    E-print Network

    Oliver, Douglas L.

    5. Salud y seguridad para los trabajadores 1. Productos de Limpieza Ambientalmente Preferibles productos usando normas cientficas sobre impactos a la salud y el medio ambiente. Estos identifican verdes por la salud de los trabajadores y ambiente ms seguro t #12;Las dos agencias certificadoras

  10. Nombramientos Jefe de Departamento

    E-print Network

    INVESTIGACIN EN SALUD EN EL TRABAJO Para la M. en C. Norma Elena Prez Herrera, estudiante de Doctorado de la del trabajo oral titulado "Efectos de la salud reproductiva de trabajadores agrcolas ocupacionalmente expuestos a plaguicidas", dentro de la X Reunin Nacional de Investigacin en Salud en el Trabajo, que se

  11. Utah Commission on Aging Minutes for December 8, 2006

    E-print Network

    Tipple, Brett

    Sharon Donnelly LaDene Larsen Utah Health Department Alan Matheson Envison Utah Anne Smith Health Insight Alan Ormsby Utah Human Services Division #12;The meeting was called to order by Chair Norma Matheson exemption amount. Sponsored by Rep. Ross Romero. Language of bill amended at the suggestion

  12. Utah Commission on Aging August 28, 2007

    E-print Network

    Tipple, Brett

    MINUTES Utah Commission on Aging August 28, 2007 2:00 4:00 pm D R A F T Commission Member Attendees: Senator Allen Christensen Utah Senate Representative Steven Mascaro Utah House of Representatives Rob Ence AARP Diana Kirk Zion's Bank Norma Matheson Chair Mark Supiano University of Utah Mayor Jo

  13. Utah Commission on Aging December 5, 2007

    E-print Network

    Tipple, Brett

    MINUTES Utah Commission on Aging December 5, 2007 1:00 3:00 pm Commission Member Attendees: Norma Matheson Chair Maureen Henry Executive Director Senator Alan Christensen Utah Senate Representative Steven Mascaro Utah House of Representatives Laura Polachek for Rob Ence AARP Mark Supiano U of U Center on Aging

  14. Utah Commission on Aging June 3, 2008

    E-print Network

    Tipple, Brett

    MINUTES Utah Commission on Aging June 3, 2008 12:00 2:00 pm Commission Member Attendees: Representing: Norma Matheson Chair Maureen Henry Executive Director David Sundwall Utah Department of Health for Deborah Bayle United Way Archie Archuleta Ethnic Minorities Alan Ormsby for LM Church Utah Department

  15. Utah Commission on Aging June 6, 2007

    E-print Network

    Tipple, Brett

    MINUTES Utah Commission on Aging June 6, 2007 1:00 2:30 pm Commission Member Attendees: Lisa-Michele Church DHS TantaLisa Clayton Utah Legal Services Rob Ence AARP Michael Jones Utah Department of Financial Institutions Norma Matheson Chair Anne Peterson University of Utah Mayor JoAnn Seghini Midvale City Sara

  16. Utah Commission on Aging Minutes for February 17, 2006

    E-print Network

    Tipple, Brett

    Utah Commission on Aging Minutes for February 17, 2006 Commission Member Attendees: TantaLisa Clayton Utah Legal Services William Cox Rich County Rob Ence AARP Michael Jones Utah Department of Financial Institutions Pat Jones Utah House of Representatives Norma Matheson Honorary Chair Shauna O

  17. Utah Commission on Aging August 25, 2008

    E-print Network

    Tipple, Brett

    MINUTES Utah Commission on Aging August 25, 2008 12:30 2:30 pm Commission Member Attendees: Representing: Norma Matheson Chair Maureen Henry Executive Director Rep. Steven Mascaro Utah House of Representatives Michael Deily for David Sundwall Utah Department of Health Cherie Brunker Health Care Mayor Jo

  18. PANTONE 295 PANTONE black tiro Universidad

    E-print Network

    Vsquez, Carlos

    telecomunicaciones y desarrollo de aplicaciones sobre plataformas distribuidas; al diseo e interconexin de redes comunicacin entre sus diversas redes y como plataforma que soporta el desarrollo de aplicaciones distribuidas referidas a redes de comunicacin de voz y datos, comunicaciones inalmbricas, normas y estndares para

  19. Psycho? Logical? Bulletin In This Issue

    E-print Network

    Spirtes, Peter

    : Undergraduate Research Meth ods Poster Session, 4-6 PM May 4th: Katia Dilkina Brown Bag May 9th: Norma Chang of making the playoffs, losing their last match by a hard-fought fi- nal score of 7-6. However, the team

  20. 75 FR 53280 - National Board for Education Sciences

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-31

    ... National Board for Education Sciences AGENCY: Department of Education, Institute of Education Sciences... upcoming meeting of the National Board for Education Sciences. The notice also describes the functions of... CONTACT: Norma Garza, Executive Director, National Board for Education Sciences, 555 New Jersey Ave.,...

  1. CAMBIO CLIMTICO: UN RETO PARA TODOS

    E-print Network

    Grutter, Michel

    , estudiantes y pblico en gene- ral participaron en conferencias magistrales, mesas redondas y exposicin de irreversibles", puntualiz Muoz Sevilla. Posteriormente, el Dr. Carlos Gay Garca, Coordi- nador del PINCC paracrearsinergiasinterdisciplinariasquecoadyuven La Dra. Norma Patricia Muoz Sevilla y el Dr. Carlos Gay Garca durante la ceremonia de

  2. A Lightning Rod on Civil Rights.

    ERIC Educational Resources Information Center

    Healy, Patrick

    1999-01-01

    Examines the work of Norma V. Cantu, the head of the U.S. Department of Education's Office for Civil Rights and the controversy surrounding her tenure. Issues discussed include the range of concerns she must address, including affirmative action, gender equity in athletics, and college desegregation in the South, and her strategies for

  3. Revista Iberoamericana de Polmeros Volumen 11(3), Mayo 2010 Lodi et als. Degradacin de geomembranas de PE

    E-print Network

    Zornberg, Jorge G.

    ensaios foram realizados de acordo com as recomendaes das seguintes normas: ASTM D1435 (intemprie), ASTM D5747 e D5322 (lixvia), ASTM D1238 (MFI) e D3895 (OIT). Os resultados mostram, por exemplo, que were performed according the following standards recommendations: ASTM D1435 (weathering), ASTM D5747 e

  4. SHORT COMMUNICATIONS 587 The Condor 105:587592

    E-print Network

    McGraw, Kevin J.

    -xanthophylls A and B). Because yel- low metabolites appear to be manufactured via a dif- ferent metabolic process para determinar como se podrian haber alterado las rutas metabolicas. Los cardenales norma- les delica. En cambio, parece haber inhabilitado solo una clase de reacciones metabolicas y sus enzimas

  5. REGIMENTO DO CURSO DE PS-GRADUAO EM CINCIA E TECNOLOGIA DE MATERIAIS E SENSORES

    E-print Network

    REGIMENTO DO CURSO DE PS-GRADUAO EM CINCIA E TECNOLOGIA DE MATERIAIS E SENSORES TTULO I DOS Sensores (CMS), do Curso de Ps-graduao em Engenharia e Tecnologia Espaciais (ETE) do INPE, tem como Regimento dos Cursos de Ps-Graduao do INPE, pelas normas do Conselho de Ps-Graduao, pelo Regimento do

  6. www.BioTechniques.com125Vol. 57 | No. 3 | 2014 In principle, RPPAs are miniaturized

    E-print Network

    Timmer, Jens

    benefit from a robust, freely available software tool allowing data comparison across different RPPA discovery and systems biology research (2,3). The RPPA user base is also increasing, as demon- strated-source RPPA tools such NormaCurve (12), Reno (13), and others (14) is their limitation in data preprocessing

  7. 75 FR 30855 - Meeting of the California Desert District Advisory Council

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-02

    ...to 4:30 p.m. and will meet in formal session on Saturday, June 19, 2010, from 8 a.m. to 4:30 p.m. at the Heritage Inn and Suites, 1050 N. Norma St., Ridgecrest, California. Agenda topics will include updates by Council members...

  8. A Fragile Rock

    ERIC Educational Resources Information Center

    Blackwood, Kendrick

    2006-01-01

    In this article, the author profiles Norma Jean Taylor, a teacher who is suffering from an incurable degenerative disease. She can no longer walk, or even write legibly. But with help from students and colleagues, she remains a cornerstone of her school. The disease has not yet taken her love of teaching, though it has forced her to radically

  9. The faculty of the University is defined as full-time members of the academic

    E-print Network

    Harms, Kyle E.

    Alumni Professor Human Ecology JOHN R. MAY Donald & Norma Nash McClure Alumni Professor English Pathobiological Sciences JIMMIE D. LAWSON Mathematics ROBERT F. O'CONNELL Physics and Astronomy WILLIAM A Alumni Professor Mathematics JAMES A. RICHARDSON John Rhea Alumni Professor Economics KARL A

  10. Theoretical-Experimental Molecular Engineering to Develop Nanodevices for Sensing Science

    E-print Network

    Rangel, Norma Lucia

    2012-07-16

    ........................................................................ 67 5.2.3 Conclusions .......................................................................................... 76 5.3 Graphene MEP Amplifier .................................................................................. 76 5.3.1 Theoretical...-1 THEORETICAL-EXPERIMENTAL MOLECULAR ENGINEERING TO DEVELOP NANODEVICES FOR SENSING SCIENCE A Dissertation by NORMA LUCIA RANGEL Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

  11. Financial Aid Scholarships MARY GENCO PARKER

    E-print Network

    Harms, Kyle E.

    Financial Aid Scholarships MARY GENCO PARKER Director CHRISTINE DAY Associate Director PATRICK Assistant Director NORMA RILES Administrative Specialist Office of Student Aid & Scholarships 202 Himes Hall 225/578-3103 FAX 225/578-6300 WEB SITE www.lsu.edu/financialaid LSU awards scholarships in the form

  12. Cell, Vol. 33, 211-219, May 1983, Copyright0 1983 by MIT 0092.8674/83/0211-09$02.00/O Isolation of the ,&Tubulin Gene from Yeast and

    E-print Network

    Botstein, David

    of the ,&Tubulin Gene from Yeast and Demonstration of Its Essential Function In Vivo Norma F. Neff, James H. Thomas, Massachusetts 02139 Summary A DNA fragment from yeast (Saccharomyces cere- visiae) was identified by its homology to a chicken p-tubulin cDNA and cloned. The fragment was shown to be unique in the yeast genome

  13. MINISTRIO DA EDUCAO UNIVERSIDADE FEDERAL DO RIO DE JANEIRO

    E-print Network

    Liu, I-Shih

    inteiramente gratuito do programa na Instituio. Nos termos do Regimento e das Normas Acadmicas: a proposta e Regimento do PROFHISTRIA. b) Documento de aprovao institucional do curso ou declarao participao da Instituio no PROFHISTRIA estar condicionada aprovao institucional do curso antes da

  14. RESOLUO No 01/PPGL/2011, de 18 de maio de 2011.

    E-print Network

    Floeter, Sergio Ricardo

    recredenciamento de docentes no Programa de Ps-Graduao de Literatura. No uso de suas atribuies estatutrias e, a Coordenao do Programa de Ps-Graduao em Literatura RESOLVE: APROVAR as seguintes normas especficas para credenciamento e recredenciamento de docentes no Programa de Ps-Graduao em Literatura: Art. 1. A proposta de

  15. PLANEJAMENTO ESTRATGICO DA COORDENAO DO CURSO DE GRADUAO EM FILOSOFIA PARA O TRINIO 20102012 SITUAO DO CURSO NO INCIO DO ANO LETIVO DE 2010

    E-print Network

    Paraná, Universidade Federal do

    curso, sobretudo durante a Feira de Profissões A1 ­ Norma da Luz Ferrarini A1, A2, A3 ­ Eduardo Barra ­ Eduardo Barra A1 ­ Lúcio Lobo A1, A2 ­ Inara Januzzi A1 ­ Isabel Limonge A1 ­ Geraldo Balduino A1 ­ Celso

  16. September 2011 APPENDIX E: HSEMS Chart of Responsibilities for College of Pharmacy and Nutrition

    E-print Network

    Saskatchewan, University of

    September 2011 APPENDIX E: HSEMS Chart of Responsibilities for College of Pharmacy and Nutrition Dean of Pharmacy & Nutrition OVERALL RESPONSIBILITY FOR HSEMS Dr. David Hill P/N WSEP Chair HSEMS 1 Nutrition Resource Centre Dr. Shawna Berenbaum G29 THORV Foods Lab Norma Greer Course Instructor Course

  17. University or Source of Best Practice Proposals # About.com 2

    E-print Network

    Fernandez, Eduardo

    Awards 1 Best Practices, LLC 2 Beta Gamma Sigma, Inc. 1 Book by Auskalnis, Ketchum & Carter 1 29-Nov-12-Effective Organization 1 Book by John G. Salek 1 Book by Mary S. Schaeffer 13 Book by Norma Goonen & Rachael Blechman 2 10 Cincinnati State Technical and Community College 1 29-Nov-12 #12;University or Source of Best

  18. Temporal and Spatial Variability of Ross polynya using Multi-Satellite Observations

    NASA Astrophysics Data System (ADS)

    Park, J.; Jo, Y. H.

    2014-12-01

    Polynyas are particularly vulnerable to not only local environmental changes, but also global climate changes through air-sea-ice interactions. In order to understand the large scales of its interactions, a temporal and spatial variation of polynyas and, areas of open water in the middle of ice shelf, around the Antarctica were analyzed based on remote sensing measurements. Especially, the polynya in the Ross Sea (Ross polynya) was analyzed, which was the largest on among the all of them around the Antarctica for last decades. Accordingly, the main purpose of this presentation is to (1) evaluate a variability of Ross polynya spatial and temporal characteristics and (2) address relationship between spatial polynya variability and global warming effect. In order to conduct research the observations from the Advanced Microwave Scanning Radiometer-EOS (AMAR-E) were used. The products (SST, wind speed, cloud vapor, atmospheric water vapor and rain rate), including sea ice extent, are from June 2002 to October 2011. Additionally, Gravity Recovery and Climate Experiment (GRACE) data sets were used to estimate mass changes in adjacent ice sheet affected by local atmospheric condition. Based on the nine year's data, research results suggest that Ross polynya normally started to appear around the end of December and persist for about 77.5 days. The extent of Ross polynya in 2011 is the largest and had a tendency to increase year after year. SST in adjacent sea has slightly decreased for the same period (as 0.054?C yr-1) due to the melting ice and variation of wind, water vapor and rain rate are 0.054 m s-1 yr-1, -0.027 mm yr-1 and 0.001 mm hr-1 yr-1, respectively. Increase land mass in the west-southern Antarctica could be the result of accumulating snow which is made of vapor induced by extended polynya. In addition, we would conduct to evaluate a correlation with characteristics of other global and local components corresponding climate change and understand that how the climate change effect have implications for Ross polynya and glacial or environmental condition in the vicinity.

  19. El avin negro: The Political and Structural Context

    E-print Network

    Batchelder, Norma Woodward

    1987-04-01

    avin negro: The Political and Structural Context Norma Woodward Batchelder In 1970, a political drama of remarkable prescience was staged in Buenos Aires. Its unusual collective authorship by four established contemporary playwrights, Roberto Cossa..., Germn Rosenmacher, Carlos Somigliana and Ricardo Talesnik, instantly placed El avion negro in the limelight. Written around the time of the 1969 Cordobazo and predicated upon the then hypothetical return from exile of General Juan Pern, El avin...

  20. B823u Brasil. Universidade de Braslia A UnB que voc v. Guia do calouro

    E-print Network

    Maier, Rudolf Richard

    #12;Prof. Ivan Marques de Toledo Camargo Reitor Profa. Snia Nair Bo Vice-reitora Prof. Mauro Luiz1 1/2015 GUIA CALOURO DO #12;B823u Brasil. Universidade de Braslia A UnB que voc v. Guia do. Braslia: Editora UnB, 2014. 125 p. ; 21 cm. ISBN 978-85-230-1334-9 1. Normas UnB. 2. Manual do calouro. I

  1. Guia do calouro 2 2014 B823u Brasil. Universidade de Braslia

    E-print Network

    Zalesskii, Pavel

    Marques de Toledo Camargo Reitor Profa. Snia Nair Bo Vice-reitora Prof. Mauro Luiz Rabelo Decano deGuia do calouro 2 2014 #12;B823u Brasil. Universidade de Braslia A UnB que voc v. Guia do : Editora UnB, 2014. 125 p. ; 21 cm. 1. Normas UnB. 2. Manual do calouro. I. Ttulo CDU: 061.27 (035) (81

  2. Review: Marko Jesenek: Prekmuriana. Fejezetek a szlovn nyelv trtnetb?l.

    E-print Network

    Luká csné Bajzek, Má ria

    2012-01-01

    sajt knyvsorozata meglep? b?sggel gazdagtotta s gaz- dagtja a hazai szlavisztikai termst. Ennek szerz?i eddig kivtel nlkl az ehhez a fels?oktatsi s szakmai m?- helyhez kt?d? irodalomtrtnszek s nyelvszek voltak. Marko Jesenek neves... irodalmi nyelvi norma lte- zst konstatlja: a tgabb rtelemben vett kzponti szlovnt s a kelet-szlo- vnt. A szerz? arra vllalkozik, hogy elmleti alapvetsnek megfelel?en sokoldalan dokumentlva, els?sorban a kelet-szlovn rgira koncentrlva...

  3. Cognome: Nome: Matricola: Laboratorio di Calcolo Numerico -Corso di Laurea in Matematica

    E-print Network

    Causin, Paola

    dalla function Matlab fzero usata nel seguente modo options=optimset('TolX',1e-10); alpha=fzero(fun,0.3,options); 1. Usare il metodo di bisezione con estremi a = 0.3, b = 0.6 per l'approssimazione di con toll norma infinito dell'errore tra derivata seconda della funzione, data dall'espressione f (x) = 9x2 - 1 (1

  4. Lafayette Metropolitan Planning Organization 2030 Transportation Plan

    E-print Network

    Lafayette Metropolitan Planning Organization

    2010-10-31

    Howard Mczeal City-Parish Council Designee Purvis Morrison City of Scott Kevin Normand City-Parish Council Designee Jamie Setze Federal Highway Administration Tom Sammons Town of Youngsville 1.52 Technical Transportation Committee...-Schaffer, Inc. 6 June, 2005 Brigitte Karr Southwest Louisiana Independence Living Center Jamie Sietz Federal Highway Administration Norma Dugas Clerk, City-Parish Council Cathy Webre Lafayette Downtown Development Authority 1.53 Citizens Advisory...

  5. Extinction risk and structure of a food web model

    E-print Network

    Pȩkalski, A; Bena, I; Droz, M

    2007-01-01

    We investigate in detail the model of a trophic web proposed by Amaral and Meyer [Phys. Rev. Lett. 82, 652 (1999)]. We focused on small-size systems that are relevant for real biological food webs and for which the fluctuations are playing an important role. We show, using Monte Carlo simulations, that such webs can be non-viable, leading to extinction of all species in small and/or weakly coupled systems. Estimations of the extinction times and survival chances are also given. We show that before the extinction the fraction of highly-connected species ("omnivores") is increasing. Viable food webs exhibit a pyramidal structure, where the density of occupied niches is higher at lower trophic levels, and moreover the occupations of adjacent levels are closely correlated. We also demonstrate that the distribution of the lengths of food chains has an exponential character and changes weakly with the parameters of the model. On the contrary, the distribution of avalanche sizes of the extinct species depends strong...

  6. Extinction risk and structure of a food web model

    NASA Astrophysics Data System (ADS)

    P?kalski, Andrzej; Szwabi?ski, Janusz; Bena, Ioana; Droz, Michel

    2008-03-01

    We investigate in detail the model of a trophic web proposed by Amaral and Meyer [Phys. Rev. Lett. 82, 652 (1999)]. We focus on small-size systems that are relevant for real biological food webs and for which the fluctuations play an important role. We show, using Monte Carlo simulations, that such webs can be nonviable, leading to extinction of all species in small and/or weakly coupled systems. Estimations of the extinction times and survival chances are also given. We show that before the extinction the fraction of highly connected species (omnivores) is increasing. Viable food webs exhibit a pyramidal structure, where the density of occupied niches is higher at lower trophic levels, and moreover the occupations of adjacent levels are closely correlated. We also demonstrate that the distribution of the lengths of food chains has an exponential character and changes weakly with the parameters of the model. On the contrary, the distribution of avalanche sizes of the extinct species depends strongly on the connectedness of the web. For rather loosely connected systems, we recover the power-law type of behavior with the same exponent as found in earlier studies, while for densely connected webs the distribution is not of a power-law type.

  7. Thermographic diagnostics to discriminate skin lesions: a clinical study

    NASA Astrophysics Data System (ADS)

    Stringasci, Mirian Denise; Moriyama, Lilian Tan; Salvio, Ana Gabriela; Bagnato, Vanderlei Salvador; Kurachi, Cristina

    2015-06-01

    Cancer is responsible for about 13% of all causes of death in the world. Over 7 million people die annually of this disease. In most cases, the survival rates are greater when diagnosed in early stages. It is known that tumor lesions present a different temperature compared with the normal tissues. Some studies have been performed in an attempt to establish new diagnosis methods, targeting this temperature difference. In this study, we aim to investigate the use of a handheld thermographic camera to discriminate skin lesions. The patients presenting Basal Cell Carcinoma, Squamous Cell Carcinoma, Actinic Keratosis, Pigmented Seborrheic Keratosis, Melanoma or Intradermal Nevus lesions have been investigated at the Skin Departament of Amaral Carvalho Hospital. Patients are selected by a dermatologist, and the lesion images are recorded using an infrared camera. The images are evaluated taken into account the temperature level, and differences into lesion areas, borders, and between altered and normal skin. The present results show that thermography may be an important tool for aiding in the clinical diagnostics of superficial skin lesions.

  8. Saldanha Massif, Mid-Atlantic Ridge: A Controlled Source EM Study

    NASA Astrophysics Data System (ADS)

    Sinha, M. C.; Santos, F.; Dzhatieva, Z.; Dias, A.; Marques, A. F.; Silva, N.; de Nijs, I.

    2005-12-01

    In November-December 2004 a controlled source electromagnetic (CSEM) survey was carried out on the axis of the Mid-Atlantic Ridge during cruise Charles Darwin 167. The work is centred on a non-transform offset between the FAMOUS and AMAR segments, at 36 34' North. Here, a prominent feature is the Saldanha massif: a dome of unroofed mantle rocks, consisting largely of serpentised peridotites, and at whose summit significant low-temperature hydrothermal venting has been documented. Our objective is to determine the distribution of electrical resistivity and hence porosity over a volume of ~ 10 km x 10 km x 3 km vertically, in order to constrain the degree of penetration of seawater into the crust and uppermost mantle; to contrast the porosity structure here with volcanically hosted systems away from segment boundaries elsewhere on the MAR; and to constrain models of non-volcanic heat sources and hydrothermal circulation in ultramafic settings at slow spreading ridges. In addition to the CSEM survey we obtained swath bathymetry, gravity and magnetic data; water column physical properties and seafloor current data; and a number of dredge and gravity core samples. We shall present details of the data and samples, together with our preliminary analysis of the results.

  9. Momentum space saturation model for deep inelastic scattering and single inclusive hadron production

    NASA Astrophysics Data System (ADS)

    Basso, E. A. F.; Gay Ducati, M. B.; de Oliveira, E. G.

    2011-08-01

    We show how the Santana Amaral-Gay Ducati-Betemps-Soyez (AGBS) model, originally developed for deep inelastic scattering applied to HERA data on the proton structure function, can also describe the RHIC data on single inclusive hadron yield for d+Au and p+p collisions through a new simultaneous fit. The single inclusive hadron production is modeled through the color glass condensate, which uses the quark (and gluon) condensate amplitudes in momentum space. The AGBS model is also a momentum space model based on the asymptotic solutions of the Balitsky-Kovchegov equation, although a different definition of the Fourier transform is used. This aspect is overcome, and a description entirely in transverse momentum of both processes arises for the first time. The small difference between the simultaneous fit and the one for HERA data alone suggests that the AGBS model describes very well both kinds of processes and thus emerges as a good tool to investigate the inclusive hadron production data. We use this model for predictions at LHC energies, which agrees very well with available experimental data.

  10. The possible role of resource requirements and academic career-choice risk on gender differences in publication rate and impact

    NASA Astrophysics Data System (ADS)

    Zeng, Xiaohan; Duch, Jordi; Sales-Pardo, Marta; Radicchi, Filippo; Otis, Shayna; Woodruff, Teresa; Amaral, Luis

    2013-03-01

    Many studies demonstrate that there is still a significant gender bias, especially at higher career levels, in many areas including science, technology, engineering, and mathematics (STEM). We investigated field-dependent, gender-specific effects of the selective pressures individuals experience as they pursue a career in academia within seven STEM disciplines. We built a unique database that comprises 437,787 publications authored by 4,292 faculty members at top United States research universities. Our analyses reveal that gender differences in publication rate and impact are discipline-specific. Our results also support two hypotheses. First, the widely-reported lower publication rates of female faculty are correlated with the amount of research resources typically needed in the discipline considered, and thus may be explained by the lower level of institutional support historically received by females. Second, in disciplines where pursuing an academic position incurs greater career risk, female faculty tend to have a greater fraction of higher impact publications than males. Our findings have significant, field-specific, policy implications for achieving diversity at the faculty level within the STEM disciplines. L. A. N. Amaral gratefully acknowledges the support of NSF awards SBE 0624318 and 0830388, and ThomsonReuters for access to the WoS data. J. Duch and M. Sales-Pardo's work have been partially supported by the Spanish DGICYT under project FIS2010-18639.

  11. Isolation and characterization of 5,6-dichloro-1-beta-D-ribofuranosylbenzimidazole-resistant mutants of the Chinese hamster ovary cell line.

    PubMed Central

    Funanage, V L

    1982-01-01

    Mutants resistant to the RNA synthesis inhibitor 5,6-dichloro-1-beta-D-ribofurano-sylbenzimidazole (DRB) have been isolated in the Chinese hamster ovary cell line CHO-K1. Three independently isolated mutants, DRB6 DRB10, and DRB13, were 3-, 5-, and 3.5-fold, respectively, more resistant to DRB than the parental cell line WTCHO. The DRB-resistant mutations were expressed codominantly in somatic cell hybrids of DRB-resistant and DRB-sensitive cell lines. In vivo treatment of CHO-K1 cells with DRB resulted in specific inhibition of endogenous RNA polymerase II activity in cell lysates. Whereas DRB inhibited RNA polymerase II activity in WTCHO cells by a maximum of 60% at concentrations as low as 60 microM, 300 microM DRB was required to inhibit 60% of the RNA polymerase II activity in DRB10 cells. However, the inhibition of the DRB-sensitive RNA polymerase II activity in DRB10 was biphasic. About half (53 to 56%) of this activity was inhibited by 90 microM DRB and thus showed a DRB sensitivity similar to the wild-type RNA polymerase II activity; the remaining DRB-sensitive RNA polymerase II activity was maximally inhibited by 300 microM DRB. These results indicated that there were two copies of the drbR locus (drb+ and drbR-10) in DRB10 and confirmed that the drbR-10 mutation was expressed codominantly. Somatic cell hybrids of DRB-resistant and alpha-amanitin-resistant cell lines grew in medium containing both DRB and alpha-amanitin, demonstrating that the drbR and amaR mutations were not in the same gene. Thus, the drbR mutations may define an additional component of the RNA polymerase II transcriptional complex in mammalian cells. Images PMID:6180307

  12. Considerations on Terrestrial Iron Depositing Analogs to Earliest Mars

    NASA Technical Reports Server (NTRS)

    Brown, Igor I.; Allen, Carlton C.; Sarkisova, S. A.; Garrison, D. H.; McKay, D. S.

    2007-01-01

    Iron oxide and hydroxide minerals, including hematite, can mineralize and preservemicrofossils and physical biomarkers (Allen at al., 2004). Preserved remnants of phototrophic microorganisms are recognized as biosignatures of past life on Earth (Schopf, 2006). To date, two types of surface iron depositing environments have been studied as analogs to possible habitable environments on earliest Mars: the highly acidified Rio Tinto River (Iberian Belt, Spain) [Gomez Ortis et al., 2007], and the nearneutral iron depositing Chocolate Pots Hot Spring (Yellowstone National Park, US) [Parenteau at al., 2005]. While phototrophs in the Rio Tinto are only represented by eukaryotic algae (Amaral Zettler et all., 2002), Chocolate Pots is mainly populated with cyanobacteria (Pierson et all., 2000; Brown et all., 2007). Which of these environments is the closer analog to a potentially habitable early Mars? Paleobiological data, combined with recent "tree of life" interpretations, suggest that phototrophic eukaryotes evolved not earlier than 2.5 - 2.8 b.y. after Earth s accretion (4.6 b.y.), while cyanobacteria and /or their iron-tolerant predecessors evolved between 1 - 1.5 b.y. after accretion (Brown et al., 2007). Lindsay and Brasier (2002) postulated that microbial life on Mars surface could have lasted no more than 1-1.5 b.y. after Mars accretion (also 4.6 b.y.). Recent multispectral mapping of Mars suggests that near-neutral wet environments prevailed at approximately this time (Bibring, et al., 2006). Thus, near-neutral iron depositing hot springs such as Chocolate Pots Hot Spring seem to be the more likely habitable analogs for earliest Mars.

  13. Distribution of oceanic and continental leads in the Arabian-Nubian Shield

    USGS Publications Warehouse

    Stacey, J.S.; Stoeser, D.B.

    1983-01-01

    New common lead data for feldspar, whole-rock, and galena samples from the Arabian-Nubian Shield, together with data from previous work, can be divided into two main groups. Group I leads have oceanic (mantle) characteristics, whereas group II leads have incorporated a continental-crustal component of at least early Proterozoic age. The group I leads are found in rocks from the Red Sea Hills of Egypt and the western and southern parts of the Arabian Shield. Group II leads are found in rocks from the northeastern and eastern parts of the Arabian Shield, as well as from the southeastern Shield near Najran. They are also found in rocks to the south in Yemen, to the east in Oman, and to the west at Aswan, Egypt. This distribution of data suggests that the Arabian-Nubian Shield has an oceanic core flanked by rocks that have developed, at least in part, from older continental material. Two mechanisms are suggested by which this older lead component could have been incorporated into the late Proterozoic rocks, and each may have operated in different parts of the Shield. The older lead component either was derived directly from an underlying early Proterozoic basement or was incorporated from subducted pelagic sediments or sediments derived from an adjacent continent. New U-Pb zircon data indicate the presence of an early Proterozoic basement southeast of Jabal Dahul in the eastern Arabian Shield. These data, together with 2,000-Ma-old zircons from the Al Amar fault zone, verify the implication of the common lead data that at least a part of the eastern Arabian Shield has an older continental basement. Because continental margins are particularly favorable locations for development of ore deposits, these findings may have important economic implications, particularly for tin, tungsten, and molybdenum exploration. ?? 1983 Springer-Verlag.

  14. Food, Environment, Engineering and Life Sciences Program (Invited)

    NASA Astrophysics Data System (ADS)

    Mohtar, R. H.; Whittaker, A.; Amar, N.; Burgess, W.

    2009-12-01

    Food, Environment, Engineering and Life Sciences Program Nadia Amar, Wiella Burgess, Rabi H. Mohtar, and Dale Whitaker Purdue University Correspondence: mohtar@purdue.edu FEELS, the Food, Environment, Engineering and Life Sciences Program is a grant of the National Science Foundation for the College of Agriculture at Purdue University. FEELS mission is to recruit, retain, and prepare high-achieving students with financial difficulties to pursue STEM (Science, Technology, Engineering, and Mathematics) careers. FEELS achieves its goals offering a scholarship of up to 10,000 per student each year, academic, research and industrial mentors, seminars, study tables, social and cultural activities, study abroad and community service projects. In year one, nine low-income, first generation and/or ethnic minority students joined the FEELS program. All 9 FEELS fellows were retained in Purdues College of Agriculture (100%) with 7 of 9 (77.7%) continuing to pursue STEM majors. FEELS fellows achieved an average GPA in their first year of 3.05, compared to the average GPA of 2.54 for low-income non- FEELS students in the College of Agriculture. A new cohort of 10 students joined the program in August 2009. FEELS fellows received total scholarships of nearly 50,000 for the 2008-2009 academic year. These scholarships were combined with a holistic program that included the following key elements: FEELS Freshman Seminars I and II, 2 study tables per week, integration activities and frequent meetings with FEELS academic mentors and directors. Formative assessments of all FEELS activities were used to enhance the first year curriculum for the second cohort. Cohort 1 will continue into their second year where the focus will be on undergraduate research. More on FEELS programs and activities: www.purdue.edu/feels.

  15. Structure, energetic and phase transition of small nickel-palladium heterogeneous clusters

    NASA Astrophysics Data System (ADS)

    Hewage, Jinasena W.

    2014-06-01

    Molecular dynamics simulation (MD) with Sutton-Chen potential for palladium-palladium, nickel-nickel and palladium-nickel interactions has been used to generate the minimum energy structures and to study the thermodynamic and dynamic properties of mixed transition metal cluster motifs of Ni n Pd(13- n) for n ? 13. Thirteen particle icosahedral clusters of neat palladium and nickel atoms were first reproduced accordingly with the results in literature. Then in the palladium icosahedra, each palladium atom has been successively replaced by nickel atom. Calculation is repeated for both palladium-centered and nickel-centered clusters. It is found that the nickel-centered clusters are more stable than the palladium-centered clusters and cohesive energy increases along the palladium end to nickel end. Phase transition of each cluster from one end-species to the other end-species is studied by means of caloric curve, root mean square bond fluctuation and heat capacity. Trend in variation of melting temperature is opposite to the energy trend. Palladium-centered cluster shows a premelting at low temperature due to the solid-solid structural transition. Species-centric order parameters developed by Hewage and Amar is used to understand the dynamic behavior in the solid-solid transition of palladium-centered cluster to more stable nickel-centered cluster (premelting). This species-centric order parameter calculation further confirmed the stability of nickel-centered species over those of palladium-centered species and solid-solid structural transition at low temperature.

  16. Neutron Based Imaging and Element-mapping at the Budapest Neutron Centre

    NASA Astrophysics Data System (ADS)

    Kis, Z.; Szentmiklsi, L.; Belgya, T.; Balask, M.; Horvth, L. Z.; Marti, B.

    The Budapest Neutron Centre (BNC) is a consortium of institutes to co-ordinate research activities carried out at the Budapest Research Reactor. It hosts two neutron imaging facilities (RAD and NORMA) operated by the Centre for Energy Research, Hungarian Academy of Sciences and offers access to this scientific infrastructure for the domestic and international users. The radiography station (RAD) at the thermal neutron beamline of the reactor gives a possibility to study relatively large objects by thermal neutron-, gamma- and X-ray radiography, and to benefit from the complementary features of the different radiations. RAD is being extended in 2014 with digital imaging and tomographic capabilities. The image detection is based on suitable converter screens. The static radiography and tomography images are acquired by a new, large area sCMOS camera, whereas the dynamic radiography is accomplished by a low-light-level TV camera and a frame grabber card. The NORMA facility is designed to perform neutron radiography and tomography on small samples using guided cold neutrons. Here two non-destructive techniques are coupled to determine the chemical composition and to visualize the internal structure of heterogeneous objects. The position-sensitive element analysis with prompt-gamma activation analysis (PGAA) and the imaging with neutron radiography/tomography (NR/NT) are integrated into a unique facility called NIPS-NORMA. The goal of such a combination of these methods is to save substantial beam time in the so-called NR/NT-driven PGAI (Prompt Gamma Activation Imaging) mode, in which the interesting regions are first visualized and located, and subsequently the time-consuming prompt-gamma measurements are made only where it is really needed. The paper will give an overview about the technical details of the facilities, and the latest results of selected applications from the fields of archaeometry, engineering and material science.

  17. Obtaining Disaster Assistance for Farms and Ranches (Spanish)

    E-print Network

    Taylor, Greg

    2007-10-08

    Granja, cont?ctese con la oficina FSA de su condado o visite el sitio Web de FSA http://www.fsa.usda.gov. Departamento de Agricultura de Texas El Programa de Dep?sito Vinculado del Departamento de Agricultura ofrece ayuda a los productores que pierden... disponibilidad de los fondos del programa. Para m?s informaci?n sobre el Programa de Dep?sito Vinculado, cont?ctese con el Departamento de Agricultura de Texas al (512) 936-0273 o visite el sitio Web (para las instrucciones y solicitud del pr?stamo, normas...

  18. Hard X-ray observations of the region from the galactic center to Centaurus

    NASA Technical Reports Server (NTRS)

    Guo, D. D.; Webber, W. R.; Damle, S. V.

    1974-01-01

    A balloon flight from Parana, Argentina, was conducted to observe emissions from discrete or extended sources in the southern sky. The sources observed include GX 304-1, Nor X-2, GX 340+0, GX 354-5, a possibly composite source near the galactic center, and the nova-like source (2U1543-47) in the Lupus-Norma region which has been reported previously only in satellite observations. Data concerning the possibility of line emission near 0.5 MeV from different regions of the southern sky are also presented.

  19. International Cosmic Ray Conference, 13th, University of Denver, Denver, Colo., August 17-30, 1973, Proceedings. Volume 5

    NASA Technical Reports Server (NTRS)

    1974-01-01

    An X-ray observation of the Norma-Lupus region, charge and isotope measurements of heavy cosmic ray nuclei and their role in the determination of cosmic ray age, and the possibility of a contribution to primary cosmic ray spectra from pulsars are among the topics covered in papers concerned with some of the results of recent cosmic ray research. Other topics covered include multiple scattering of charged particles in magnetic fields, absorption of primary cosmic rays in the atmosphere, and phase lag effects on cosmic ray modulation during a recent solar cycle. Individual items are announced in this issue.

  20. The Ideology of Happy Endings: Wolff's Mansin de Lechuzas

    E-print Network

    Helsper, Norma

    1993-04-01

    stream_size 21908 stream_content_type text/plain stream_name latr.v26.n2.123-130.pdf.txt stream_source_info latr.v26.n2.123-130.pdf.txt Content-Encoding UTF-8 Content-Type text/plain; charset=UTF-8 SPRING 1993 123... The Ideology of Happy Endings: Wolffs Mansin de lechuzas Norma Helsper Egon Wolffs Mansin de lechuzas is most often seen as the author's flawed but promising first play. Margaret Sayers Peden, for example, evaluates the woik as follows: The weak point...

  1. El realismo de los signos escnicos en el teatro de Elena Garro

    E-print Network

    Ø stergaard, Ane-Grethe

    1982-10-01

    concep cin tradicional, segn la cual el amor materno es el nico verdadero. Al mismo tiempo, sin embargo, la pregunta de Ramiro es tan ingenuamente provocadora que parece obvio interpretar la figura de la madre de acuerdo a la clsica estructura del..., una sola idea, una norma nica que nunca son capaces de transgredir; estn atados a su concepcin de s mismos como portadores de un papel social determinado: Don Fernando en su rol de padre/marido/agente del orden; Felipe en el suyo de adulto...

  2. Two southern SNR: G327.1-1.1 and Kes 27

    NASA Technical Reports Server (NTRS)

    Seward, F. D.; Kearns, K. E.; Rhode, K. L.

    1996-01-01

    Astronomical observations showed that the supernova remnants G 327.1-1.1 and the G 327.4+0.4 (Kes 27), located in the constellation Norma, are both irregular, filled-center X-ray sources with possible point sources superimposed. Rosat position sensitive proportional counter (PSPC) observations map the diffuse structure and show the unresolved sources in each field. Both remnants have bright emitting regions inside the limb, indicating the presence of high energy electrons accelerated by a pulsar. This energy bright interior region is more prominent in G 327.1-1.1 than in Kes 27.

  3. The Norwegian Offender Mental Health and Addiction Study Design and Implementation of a National Survey and Prospective Cohort Study

    PubMed Central

    Bukten, Anne; Lund, Ingunn Olea; Rognli, Eline Borger; Stavseth, Marianne Riksheim; Lobmaier, Philipp; Skurtveit, Svetlana; Clausen, Thomas; Kune, Nikolaj

    2015-01-01

    The Norwegian prison inmates are burdened by problems before they enter prison. Few studies have managed to assess this burden and relate it to what occurs for the inmates once they leave the prison. The Norwegian Offender Mental Health and Addiction (NorMA) study is a large-scale longitudinal cohort study that combines national survey and registry data in order to understand mental health, substance use, and criminal activity before, during, and after custody among prisoners in Norway. The main goal of the study is to describe the criminal and health-related trajectories based on both survey and registry linkage information. Data were collected from 1,499 inmates in Norwegian prison facilities during 20132014. Of these, 741 inmates provided a valid personal identification number and constitute a cohort that will be examined retrospectively and prospectively, along with data from nationwide Norwegian registries. This study describes the design, procedures, and implementation of the ongoing NorMA study and provides an outline of the initial data. PMID:26648732

  4. Galaxy Clusters in the Swift/BAT era II: 10 more Clusters detected above 15 keV

    SciTech Connect

    Ajello, M.; Rebusco, P.; Cappelluti, N.; Reimer, O.; Boehringer, H.; La Parola, V.; Cusumano, G.; ,

    2010-10-27

    We report on the discovery of 10 additional galaxy clusters detected in the ongoing Swift/BAT all-sky survey. Among the newly BAT-discovered clusters there are: Bullet, Abell 85, Norma, and PKS 0745-19. Norma is the only cluster, among those presented here, which is resolved by BAT. For all the clusters we perform a detailed spectral analysis using XMM-Newton and Swift/BAT data to investigate the presence of a hard (non-thermal) X-ray excess. We find that in most cases the clusters emission in the 0.3-200 keV band can be explained by a multi-temperature thermal model confirming our previous results. For two clusters (Bullet and Abell 3667) we find evidence for the presence of a hard X-ray excess. In the case of the Bullet cluster, our analysis confirms the presence of a non-thermal, power-law like, component with a 20-100 keV flux of 3.4 x 10{sup -12} erg cm{sup -2} s{sup -1} as detected in previous studies. For Abell 3667 the excess emission can be successfully modeled as a hot component (kT = {approx}13 keV). We thus conclude that the hard X-ray emission from galaxy clusters (except the Bullet) has most likely thermal origin.

  5. Evolved Gas Measurements Planned for the Lower Layers of the Gale Crater Mound with the Sample Analysis at Mars Instrument Suite

    NASA Technical Reports Server (NTRS)

    Mahaffy, Paul; Brunner, Anna; McAdam, Amy; Franz, Heather; Conrad, Pamela; Webster, Chris; Cabane, Michel

    2009-01-01

    The lower mound strata of Gale Crater provide a diverse set of chemical environments for exploration by the varied tools of the Curiosity Rover of the Mars Science Laboratory (MSL) Mission. Orbital imaging and spectroscopy clearly reveal distinct layers of hydrated minerals, sulfates, and clays with abundant evidence of a variety of fluvial processes. The three instruments of the MSL Sample Analysis at aMars (SAM) investigation, the Quadrupole Mass Spectrometer (QMS), the Tunable Laser Spectrometer (TLS), and the Gas Chromatograph (GC) are designed to analyze either atmospheric gases or volatiles thermally evolved or chemically extracted from powdered rock or soil. The presence or absence of organic compounds in these layers is of great interest since such an in situ search for this type of record has not been successfully implemented since the mid-60s Viking GCMS experiments. However, regardless of the outcome of the analysis for organics, the abundance and isotopic composition of thermally evolved inorganic compounds should also provide a rich data set to complement the mineralogical and elemental information provided by other MSL instruments. In addition, these evolved gas analysis (EGA) experiments will help test sedimentary models proposed by Malin and Edgett (2000) and then further developed by Milliken et al (2010) for Gale Crater. In the SAM EGA experiments the evolution temperatures of H2O, CO2, SO2, O2, or other simple compounds as the samples are heated in a helium stream to 1000 C provides information on mineral types and their associations. The isotopic composition of O, H, C, and S can be precisely determined in several evolved compounds and compared with the present day atmosphere. Such SAM results might be able to test mineralogical evidence of changing sedimentary and alteration processes over an extended period of time. For example, Bibring et al (2006) have suggested such a major shift from early nonacidic to later acidic alteration. We will illustrate through a variety of evolved gas experiments implemented under SAM-like gas flow and temperature ramp conditions on terrestrial analog minerals on high fidelity Sam breadboards the type of chemical information we expect SAM to provide.

  6. Gradual aridification of the Sahara during the last 11,000 years revealed by plant wax ?D analyses of Lake Yoa (Chad)

    NASA Astrophysics Data System (ADS)

    Rethemeyer, Janet; Krpelin, Stefan; Karls, Jens; Thienemann, Matthias; Melles, Martin; Schefu, Enno

    2014-05-01

    It is still an ongoing debate whether the transition of the last 'green Sahara' period to today's large desert during the Holocene, the African Humid Period (AHP), was a progressive or an abrupt change in hydrological conditions. Several climate records mainly from East Africa suggest a rapid decline of moisture availability at the end of the AHP including new data from a marine sequence off the Horn of Africa (Tierney & deMenocal, 2013). Other archives including sedimentological, geochemical and palynological data from the central North African Lakes Chad and Lake Yoa point to a gradual rather than an abrupt transition near 5,000 years ago (Amaral et al., 2013; Krpelin et al., 2008). The discrepancy of the available paleo-hydrological reconstructions underline the importance of proxy parameters directly related to hydrological conditions for accurate assessment of continental rainfall changes. Here, we present the first molecular-isotopic data from Lake Yoa documenting the hydrologic evolution over the entire Holocene. Compound-specific carbon and hydrogen isotope analyses were performed on long-chain n-alkanes. Our data indicate relative high but variable contributions of plant-derived long-chain n-alkanes carrying a distinct leaf-wax signature, i.e., a high Carbon Preference Index (CPI). A trend towards higher CPI values since 7,300 years ago suggests declining soil degradation and vegetation cover under increasingly drier conditions. In parallel, the average-chain-length of the long-chain n-alkanes increases gradually towards the present implying higher relative contributions from grasses. Compound-specific carbon isotope data confirm this finding, indicating a mixed C3/C4 contribution in the early and mid-Holocene changing towards a C4-grass dominated vegetation in the late Holocene. Most importantly, compound-specific hydrogen isotope data reveal a continuous increase from 8,100 years ago towards the present, reflecting a gradual aridification. The large amplitude of about 40 per mil change from the early to late Holocene reflects the retreating influence of moisture derived from the West Africa monsoon from the area, in accordance with isotopic modelling studies (Tierney et al., 2011). Our data thus indicate a gradual hydrological evolution in the eastern central Sahara over the Holocene, controlled by insolation forcing, and argue against strong bio-geophysical feedback mechanisms. Site-specific local thresholds might exist in other regions, e.g., the Horn of Africa, leading to abrupt rainfall changes.

  7. A lead isotope study of mineralization in the Saudi Arabian Shield

    USGS Publications Warehouse

    Stacey, J.S.; Doe, B.R.; Roberts, R.J.; Delevaux, M.H.; Gramlich, J.W.

    1980-01-01

    New lead isotope data are presented for some late Precambrian and early Paleozoic vein and massive sulfide deposits in the Arabian Shield. Using the Stacey Kramers (1975) model for lead isotope evolution, isochron model ages range between 720 m.y. and 420 m.y. Most of the massive sulfide deposits in the region formed before 680 m.y. ago, during evolution of the shield. Vein type mineralization of higher lead content occurred during the Pan African event about 550 m.y. ago and continued through the Najd period of extensive faulting in the shield that ended about 530 m.y. ago. Late post-tectonic metamorphism may have been responsible for vein deposits that have model ages less than 500 m.y. Alternatively some of these younger model ages may be too low due to the mineralizing fluids acquiring radiogenic lead from appreciably older local crustal rocks at the time of ore formation. The low207Pb/204Pb ratios found for the deposits in the main part of the shield and for those in north-eastern Egypt, indicate that the Arabian craton was formed in an oceanic crustal environment during the late Precambrian. Involvement of older, upper-crustal material in the formation of the ore deposits in this part of the shield is precluded by their low207Pb/204Pb and208Pb/204Pb characteristics. In the eastern part of the shield, east of longitude 44??20???E towards the Al Amar-Idsas fault region, lead data are quite different. They exhibit a linear207Pb/204Pb-206Pb/204Pb relationship together with distinctly higher208Pb/204Pb characteristics. These data imply the existence of lower crustal rocks of early Proterozoic age that apparently have underthrust the shield rocks from the east. If most of the samples we have analyzed from this easterly region were mineralized 530 m.y. ago, then the age of the older continental rocks is 2,100??300 m.y. (2??). The presence of upper crustal rocks, possibly also of early Proterozoic age, is indicated by galena data from Hailan in South Yemen and also from near Muscat in Oman. These data are the first to indicate such old continental material in these regions. ?? 1980 Springer-Verlag.

  8. The search for low-luminosity high-mass X-ray binaries and the study of X-ray populations in the Galactic disk

    NASA Astrophysics Data System (ADS)

    Fornasini, Francesca; Tomsick, John; Bodaghee, Arash; Rahoui, Farid; Krivonos, Roman; Corral-Santana, Jesus; An, Hongjun; Bauer, Franz E.; Gotthelf, Eric V.; Stern, Daniel; NuSTAR Galactic Plane Survey Team

    2016-01-01

    High-mass X-ray binaries (HMXBs), which consist of a neutron star (NS) or black hole (BH) accreting material from a massive stellar companion, provide valuable insights into the evolution of massive stars and the merger rates of NS/NS, NS/BH, and BH/BH binaries whose gravitational wave signatures will soon be detectable by facilities such as Advanced-LIGO. INTEGRAL discoveries of new classes of lower-luminosity HMXBs, some highly obscured and some showing extreme transient activity, as well as the recent discovery of the very quiescent and only known Be-BH binary, have considerably changed our understanding of clumping in massive stellar winds and the relative importance of different binary evolutionary channels. In order to better characterize the low-luminosity HMXB population, we have performed a survey of a square degree region in the direction of the Norma spiral arm with Chandra and NuSTAR. These surveys, combined with optical and infrared spectroscopic follow-up of the counterparts of hard X-ray sources, have yielded three HMXB candidates to date. Future radial-velocity follow-up of these candidates, as well as other Be HMXB candidates from the NuSTAR serendipitous survey, will help determine whether these sources truly are HMXBs and, if so, constrain the mass of the compact object in these systems. If confirmed, these HMXB candidates could extend our measurement of the HMXB luminosity function by about two orders of magnitude and provide important constraints on massive binary evolutionary models. In addition, the colliding wind binaries and pulsar wind nebulae discovered in the Norma X-ray survey will help shed light on other aspects of massive stellar evolution and massive stellar remnants. Finally, these surveys provide the opportunity to compare the hard X-ray populations in the Galactic disk and the Galactic Center. While the dominant hard X-ray populations in both of these Galactic regions appear to be cataclysmic variables (CVs), those in the Norma survey tend to have lower plasma temperatures than those in the Galactic Center, suggesting that the white dwarfs in Galactic Center CVs may have typical masses and/or magnetic field strengths that are higher than those of white dwarfs in the disk.

  9. Achieving skin to skin contact in theatre for healthy newborns.

    PubMed

    2015-06-01

    The evidence base is supportive of early skin to skin contact (SSC) for optimal newborn-physiological adaptation, bonding and breastfeeding, and national guidelines encourage SSC as soon as possible, regardless of mode of birth. With an ever-rising caesarean (CS) rate, implementing SSC in theatre stands to benefit an increasing number of mothers and babies. While it may be best practice, in reality there is a lot of variation from trust to trust, and many hospitals do not facilitate it, citing numerous reasons as to why it is not possible. Midwives may feel that they should focus on norma birth, but it is our role to provide holistic care and normalise birth in all settings. This article looks at current evidence and the role of the midwife around facilitating SSC in theatre with an example from practice of how change has been implemented so that mothers and babies get the best start in life. PMID:26320329

  10. Decline and present status of breeding peregrine falcons in Oregon

    USGS Publications Warehouse

    Henny, C.J.; Nelson, M.W.

    1981-01-01

    In 1979, only one Peregrine Falcon pair (they fledged two young) and a single adult male were located. A population decline east of the Cascades began in rhe 1930's, probably resulting from a climatic change (drought); however, a statewide decline began in the late 1940's, accelerated in the 1950's, and by the 1960's few pairs remained. The statewide decline closely paralleled the pattern of DDT use. Furthermore, DDE was found in membranes of peregrine eggs from nearby California as early as 1948. Moreover, an unhatched Peregrine Falcon egg found at the Oregon eyrie in 1979 contained 19 ppm DDE and lesser amounts of other contaminants. The eggshell was 19% thinner than normaL The future of the nearly extirpated Peregrine Falcon in Oregon remains uncertain in spite of improved water and habitat conditions in eastern Oregon. Reintroduction of captive-bred birds seems to be the last hope.

  11. Experiencias y repercusin de una formacin en tica de investigacin

    PubMed Central

    Rupaya, Carmen Rosa Garca

    2012-01-01

    El presente artculo tiene como propsito describir los logros y repercusiones de la capacitacin en tica de la investigacin que brinda el Centro Interdisciplinario de Estudios en Biotica de la Universidad de Chile, sirviendo de estmulo, motivacin y orientacin a profesionales que requieren conocer y aplicar las normas y el raciocinio conducente a la deliberacin de los problemas en esta disciplina. Asimismo, describe cmo este conocimiento genera un efecto multiplicador en aspectos tales como la participacin en un comit de tica de la investigacin (CEI), organizacin de cursos y creacin y desarrollo de lneas de investigacin, que repercuten en publicaciones realizadas con estudiantes de posgrado. Relata adems los contenidos y estrategias didcticas que pueden ser empleados en cursos de tica y biotica para estudiantes de estomatologa y concluye mencionando la aplicacin prctica de esta capacitacin en los mbitos docente, institucional y de investigacin. PMID:24482556

  12. NGC 6067: A spectroscopic study

    NASA Astrophysics Data System (ADS)

    Alonso-Santiago, J.; Negueruela, I.; Marco, A.; Dorda, R.

    2015-05-01

    NGC 6067 is a young open cluster in the Norma Cloud. Its age is around 100 Ma. It hosts a large population of evolved stars: 14 luminous red stars (most of which K Ib supergiants and late-G/early-K giants), 6--8 B giants, two A/F supergiants and two Cepheids (F/G supergiants). All this would imply that NGC 6067 represent one of the best laboratories in the Galaxy to study the evolution of intermediate-mass stars. Thackeray et al. (1962, MNRAS 124, 445T) performed the first complete study of this cluster but it has been poorly studied since then. We obtained high resolution echelle spectra (R=48000) using FEROS (Fiber Extended Range Optical Spectrograph) mounted on the ESO 2.2 m telescope at La Silla Observatory (Chile) in May 2011. Here we present preliminary results based on this spectroscopy and the UBV photometry listed in Terndrup & Pinsonneault (2007, ApJ 671, 1640).

  13. Self-Organized Criticality Systems

    NASA Astrophysics Data System (ADS)

    Aschwanden, M. J.

    2013-07-01

    Contents: (1) Introduction - Norma B. Crosby --- (2) Theoretical Models of SOC Systems - Markus J. Aschwanden --- (3) SOC and Fractal Geometry - R. T. James McAteer --- (4) Percolation Models of Self-Organized Critical Phenomena - Alexander V. Milovanov --- (5) Criticality and Self-Organization in Branching Processes: Application to Natural Hazards - lvaro Corral, Francesc Font-Clos --- (6) Power Laws of Recurrence Networks - Yong Zou, Jobst Heitzig, Jrgen Kurths --- (7) SOC computer simolations - Gunnar Pruessner --- (8) SOC Laboratory Experiments - Gunnar Pruessner --- (9) Self-Organizing Complex Earthquakes: Scaling in Data, Models, and Forecasting - Michael K. Sachs et al. --- (10) Wildfires and the Forest-Fire Model - Stefan Hergarten --- (11) SOC in Landslides - Stefan Hergarten --- (12) SOC and Solar Flares - Paul Charbonneau --- (13) SOC Systems in Astrophysics - Markus J. Aschwanden ---

  14. Conocimientos y autoeficacia asociados a la prevencin del VIH y SIDA en mujeres chilenas

    PubMed Central

    Villegas Rodrguez, Natalia; Ferrer Lagunas, Lilian Marcela; Cianelli Acosta, Rosina; Miner, Sarah; Lara Campos, Loreto; Peragallo, Nilda

    2014-01-01

    Resumen Objetivo Evaluar la relacin existente entre conocimientos y autoeficacia asociados al VIH/SIDA en mujeres chilenas en desventaja social. Metodologa Estudio correlacional, que utiliza la medicin basal del estudio Testeando una intervencin en VIH y SIDA en mujeres chilenas, realizada entre 2006 y 2008, que tiene una muestra de 496 mujeres entre 18 y 49 aos residentes en dos comunas de Santiago de Chile. Las participantes respondieron un cuestionario estructurado aplicado por entrevistadoras entrenadas. Este cuestionario incluy preguntas sobre datos sociodemogrficos, escala de conocimientos de conductas de riesgo y autoeficacia, entre otros. Resultados Edad promedio de 32.39.1 aos, 72.2% vive con su pareja y 42.7% poseen educacin media completa. La puntuacin media de los conocimientos de la infeccin por el VIH fue de 8.92.5, mientras que para las tres escalas empleadas para medir autoeficacia fueron: Normas de los pares =9.83.6, Intencin de reducir conductas de riesgo =12.23.6 y Self Efficacy Form=20.24.7. Los conocimientos tuvieron una correlacin positiva dbil con la intencin de reducir conductas de riesgo (r=0.19; p<0.0001) y con la escala Self Efficacy Form (r=0.34; p<0.0001), pero no se relacionaron con las normas de los pares en cuanto a relaciones sexuales seguras (r=0.13; p=0.78). Conclusin Existe una dbil correlacin positiva entre el nivel de conocimientos sobre el VIH/SIDA y la autoeficacia en mujeres chilenas en desventaja social. PMID:25284914

  15. The impact of land use on biological activity of agriculture soils. An State-of-the-Art

    NASA Astrophysics Data System (ADS)

    Morugn-Coronado, Alicia; Cerd, Artemi; Garca-Orenes, Fuensanta

    2014-05-01

    Biological activity is a crucial soil property affecting soil sustainability and crop production. The unsuitable land management can lead to a loss in soil fertility and a reduction in the abundance and diversity of soil microorganisms. This can be as a consequence of high erosion rates due to the mismanagement of farmers (Cerd et al., 2009a). However ecological practices and some organic amendments can promote the activities of soil microbial communities, and increase its biodiversity (Garca-Orenes et al., 2010; 2013). The impact of land use in microbiological properties of agriculture soil are presented and discussed in this review. Biological activity is quantified by microbial soil communities and soil enzyme activities to interpret the effects of soil management practices (Morugn-Coronado et al., 2013). The aim of biological activity tests is to give a reliable description of the state of agricultural soils under the effect of different land uses. Numerous methods have been used to determine the impact of land uses on microbiological properties. The current used methods for detecting microbial diversity are based on molecular techniques centered on the 16S and 18S rRNA encoding sequences such as CLPP: community-level physiological profiles; T-RFLP: terminal restriction fragment length polymorphism; DGGE: denaturing gradient gel electrophoresis; OFRG: oligonucleotide fingerprinting of rRNA genes, ARISA: Automated Ribosomal intergenic spacer analysis, SSCP: single-strand conformation polymorphism. And techniques based on the cellular composition of the microbes such as PLFA: phospholipid fatty acid analysis. Other methods are based on the activity of microbes, for example, Cmic: microbial biomass carbon; SIR: substrate induced respiration; BSR: Basal soil respiration; qCO2 metabolic quotient; enzymatic activities (Urease, -glucosidase and phosphatase) (Deng, 2012). Agricultural land management can contribute to increased rates of erosion due to desiccation, mechanical destruction, soil compaction, reduce pore volume, and disruption of access to food resources (Cerd et al., 2009b). Furthermore, it can lead to a loss in soil fertility and reduction in the abundance and diversity of soil microorganism (Caravaca et al., 2002). Nevertheless, some organic fertilizers, such as manure, waste water and sewage sludge, promote the activities of soil microbial communities (Morugn-Coronado et al., 2011; Balota et al., 2013; Macci et al., 2013). On the other hand, land use influences soil microbial processes by changing the quantity and quality of plant residues entering the soil and their spatial distribution, thorough changes in nutrients and inputs (Garca-Orenes et al., 2009; 2012). The abuse of pesticides can drastically modify the function and structure of microbial communities, altering the terrestrial ecosystems, which has important implication for soil quality (Pampulha et al., 2006). Soil quality is important for the sustainable development of terrestrial ecosystem (Paz-Ferreiro & Fu, 2013; Vasconcellos et al., 2013). This paper will review the State-of-the-Art of the scientific knowledge on the impact of land use on the biological activity in agriculture soils Acknowledgements The research projects GL2008-02879/BTE, LEDDRA 243857 and RECARE supported this research. References Balota, E. L., Yada, I.F., Amaral, H., Nakatani, A.S., Dick, R.P., Coyne, M.S. 2013. Long-term land use influences soil microbial biomass p and s, phosphatase and arylsulfatase activities, and mineralization in a brazilian oxisol. Land degradation & development. DOI: 10.1002/ldr.2242 Caravaca F, Masciandaro G, Ceccanti B. 2002. Land use in relation to soil chemical and biochemical properties in a semiarid Mediterranean environment. Soil and Tillage Research 68: 23-30. Cerd, A., Flanagan, D.C., le Bissonnais, Y., Boardman, J. 2009a. Soil erosion and agriculture Soil and Tillage Research 106, 107-108. DOI: 10.1016/j.still.2009.1 Cerd, A., Gimnez-Morera, A.G., Bod, M.B. 2009b. Soil and water losses from new citrus orchards

  16. EAARL coastal topography-western Florida, post-Hurricane Charley, 2004: seamless (bare earth and submerged.

    USGS Publications Warehouse

    Nayegandhi, Amar; Bonisteel, Jamie M.; Wright, C. Wayne; Sallenger, A.H.; Brock, John C.; Yates, Xan

    2010-01-01

    Project Description These remotely sensed, geographically referenced elevation measurements of lidar-derived seamless (bare-earth and submerged) topography were produced as a collaborative effort between the U.S. Geological Survey (USGS), Coastal and Marine Geology Program (CMGP), St. Petersburg, FL, and the National Aeronautics and Space Administration (NASA), Wallops Flight Facility, VA. This project provides highly detailed and accurate datasets of a portion of the western Florida coastline beachface, acquired post-Hurricane Charley on August 17 and 18, 2004. The datasets are made available for use as a management tool to research scientists and natural-resource managers. An innovative airborne lidar instrument originally developed at the NASA Wallops Flight Facility, and known as the Experimental Advanced Airborne Research Lidar (EAARL), was used during data acquisition. The EAARL system is a raster-scanning, waveform-resolving, green-wavelength (532-nanometer) lidar designed to map near-shore bathymetry, topography, and vegetation structure simultaneously. The EAARL sensor suite includes the raster-scanning, water-penetrating full-waveform adaptive lidar, a down-looking red-green-blue (RGB) digital camera, a high-resolution multispectral color infrared (CIR) camera, two precision dual-frequency kinematic carrier-phase GPS receivers, and an integrated miniature digital inertial measurement unit, which provide for sub-meter georeferencing of each laser sample. The nominal EAARL platform is a twin-engine Cessna 310 aircraft, but the instrument may be deployed on a range of light aircraft. A single pilot, a lidar operator, and a data analyst constitute the crew for most survey operations. This sensor has the potential to make significant contributions in measuring sub-aerial and submarine coastal topography within cross-environmental surveys. Elevation measurements were collected over the survey area using the EAARL system, and the resulting data were then processed using the Airborne Lidar Processing System (ALPS), a custom-built processing system developed in a NASA-USGS collaboration. ALPS supports the exploration and processing of lidar data in an interactive or batch mode. Modules for presurvey flight-line definition, flight-path plotting, lidar raster and waveform investigation, and digital camera image playback have been developed. Processing algorithms have been developed to extract the range to the first and last significant return within each waveform. ALPS is used routinely to create maps that represent submerged or sub-aerial topography. Specialized filtering algorithms have been implemented to determine the 'bare earth' under vegetation. For more information about similar projects, please visit the Decision Support for Coastal Science and Management website. Selected References Brock, J.C., Wright, C.W., Sallenger, A.H., Krabill, W.B., and Swift, R.N., 2002, Basis and methods of NASA airborne topographic mapper Lidar surveys for coastal studies: Journal of Coastal Research, v. 18, no. 1, p. 1-13. Crane, Michael, Clayton, Tonya, Raabe, Ellen, Stoker, Jason, Handley, Larry, Bawden, Gerald, Morgan, Karen, and Queija, Vivian, 2004, Report of the U.S. Geological Survey Lidar workshop sponsored by the Land Remote Sensing Program and held in St. Petersburg, FL, November 2002: U.S. Geological Survey Open-File Report 2004-1456, 72 p. Nayegandhi, Amar, Brock, J.C., and Wright, C.W., 2009, Small-footprint, waveform-resolving Lidar estimation of submerged and sub-canopy topography in coastal environments: International Journal of Remote Sensing, v. 30, no. 4, p. 861-878. Sallenger, A.H., Wright, C.W., and Lillycrop, Jeff, 2005, Coastal impacts of the 2004 hurricanes measured with airborne Lidar; initial results: Shore and Beach, v. 73, nos. 2-3, p. 10-14. Resources Included Readme.txt File

  17. List of Participants

    NASA Astrophysics Data System (ADS)

    2007-11-01

    Mohab Abou ZeidVrije Universiteit, Brussel Joke AdamKatholieke Universiteit Leuven Nikolas AkerblomMax-Planck-Institut fr Physik, Mnchen Luis Fernando Alday Utrecht University Stelios Alexandris University of Patras Antonio Amariti Universit di Milano-Bicocca Nicola Ambrosetti Universit de Neuchtel Pascal Anastasopoulos Universit di Roma Tor Vergata Laura Andrianopoli Enrico Fermi Center Carlo Angelantonj Universit di Torino Lilia Anguelova Queen Mary, University of London Daniel AreanUniversidade de Santiago de Compostela Gleb ArutyunovUtrecht University Spyros Avramis NTU AthensUniversity of Patras Ioannis Bakas University of Patras Subrata Bal Dublin Institute for Advanced Studies Igor Bandos Valencia University Jessica Barrett University of Iceland Marco Baumgartl Eidgenssische Technische Hochschule, Zrich Jacopo Bechi Universit di Firenze James Bedford Queen Mary, University of London Jorge Bellorin Universidad Autonoma de Madrid Francesco Benini SISSA, Trieste Eric Bergshoeff Centre for Theoretical Physics, University of Groningen Gaetano BertoldiUniversity of Wales, Swansea Adel Bilal Laboratoire de Physique Thorique, cole Normale Superieure, Paris Matthias Blau Universit de Neuchtel Johannes BroedelUniversitt Hannover Felix Brmmer Universitt Heidelberg Julio Cesar Bueno de Andrade So Paulo State UniversityUNESP Cliff Burgess McMaster University Agostino Butti Laboratoire de Physique Thorique, cole Normale Superieure, Paris Marco Caldarelli Universitat de Barcelona Pablo G Camara Centre de Physique Thorique, cole Polytechnique, Palaiseau Joan Camps Universitat de Barcelona Felipe Canoura FernandezUniversidade de Santiago de Compostela Luigi Cappiello Universit di Napoli Federico II Luca Carlevaro cole Polytechnique, Palaiseau Roberto Casero Centre de Physique Thorique, cole Polytechnique, Palaiseau Claudio Caviezel Max-Planck-Institut fr Physik, Mnchen Alessio Celi Universitat de Barcelona Anna Ceresole Istituto Nazionale di Fisica Nucleare and Universit di Torino Kang Sin Choi University of Bonn Michele Cirafici University of Patras Andres Collinucci Katholieke Universiteit Leuven Aldo Cotrone Universitat de Barcelona Ben Craps Vrije Universiteit, Brussel Stefano Cremonesi SISSA, Trieste Gianguido Dall'Agata Padova University Sanjit Das Indian Institute of Technology, Kharagpur Forcella Davide SISSA, Trieste Jose A de Azcarraga Valencia University and Instituto de Fsica Corpuscular (CSIC-UVEG), Valencia Sophie de BuylInstitut des Hautes tudes Scientifiques, Bures-sur-Yvette Jean-Pierre Derendinger Universit de Neuchtel Stephane Detournay Universit Degli Studi di Milano Paolo Di Vecchia NORDITA, Kbenhavn Oscar Dias Universitat de Barcelona Vladimir Dobrev Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia Joel Ekstrand Department of Theoretical Physics, Uppsala University Federico Elmetti Universit di Milano I Diaconu Eugen University of Craiova Oleg Evnin Vrije Universiteit, Brussel Bo Feng Imperial College, London Livia Ferro Universit di Torino Pau Figueras Universitat de Barcelona Raphael Flauger University of Texas at Austin Valentina Forini Universit di Perugia Angelos Fotopoulos Universit di Torino Denis Frank Universit de Neuchtel Lisa Freyhult Albert-Einstein-Institut, Golm Carlos Fuertes Instituto de Fsica Terica, Madrid Matthias Gaberdiel Eidgenssische Technische Hochschule, Zrich Maria Pilar Garcia del Moral Universit di Torino Daniel Gerber Instituto de Fsica Terica, Madrid Valentina Giangreco Marotta Puletti Uppsala University Joaquim Gomis Universitat de Barcelona Gianluca Grignani Universit di Perugia Luca Griguolo Universit di Parma Umut Gursoy cole Polytechnique, Palaiseau and cole Normale Suprieure, Paris Michael Haack Ludwig-Maximilians-Universitt, Mnchen Troels Harmark Niels Bohr Institute, Kbenhavn Alexander Haupt Imperial College, London Michal Heller Jagiellonian University, Krakow Samuli Hemming University of Iceland Yasuaki Hikida DESY,

  18. List of Participants

    NASA Astrophysics Data System (ADS)

    2008-11-01

    Mohab Abou ZeidInstitut des Hautes tudes Scientifiques, Bures-sur-Yvette Ido AdamMax-Planck-Institut fr Gravitationsphysik (AEI), Potsdam Henrik AdorfLeibniz Universitt Hannover Mohammad Ali-AkbariIPM, Tehran Antonio Amariti Universit di Milano-Bicocca Nicola Ambrosetti Universit de Neuchtel Martin Ammon Max-Planck-Institut fr Physik, Mnchen Christopher Andreycole Polytechnique Fdrale de Lausanne (EPFL) Laura AndrianopoliPolitecnico di Torino David AndriotLPTHE, Universit UPMC Paris VI Carlo Angelantonj Universit di Torino Pantelis ApostolopoulosUniversitat de les Illes Balears, Palma Gleb ArutyunovInstitute for Theoretical Physics, Utrecht University Davide AstolfiUniversit di Perugia Spyros AvramisUniversit de Neuchtel Mirela BabalicChalmers University, Gteborg Foday BahDigicom Ioannis Bakas University of Patras Igor BandosUniversidad de Valencia Jose L F BarbonIFTE UAM/CSIC Madrid Till BargheerMax-Planck-Institut fr Gravitationsphysik (AEI), Potsdam Marco Baumgartl Eidgenssische Technische Hochschule (ETH), Zrich James BedfordImperial College London Raphael BenichouLaboratoire de Physique Thorique, cole Normale Suprieure, Paris Francesco Benini SISSA, Trieste Eric Bergshoeff Centre for Theoretical Physics, University of Groningen Alice BernamontiVrije Universiteit, Brussel Julia BernardLaboratoire de Physique Thorique, cole Normale Suprieure, Paris Adel Bilal Laboratoire de Physique Thorique, cole Normale Suprieure, Paris Marco Billo' Universit di Torino Matthias Blau Universit de Neuchtel Guillaume BossardAlbert-Einstein-Institut, Golm Leonardo Brizicole Polytechnique Fdrale de Lausanne (EPFL) Johannes BroedelLeibniz Universitt Hannover (AEI) Tom BrownQueen Mary, University of London Ilka BrunnerEidgenssische Technische Hochschule (ETH), Zrich Erling BrynjolfssonUniversity of Iceland Dmitri BykovSteklov Institute, Moscow and Trinity College, Dublin Joan CampsUniversitat de Barcelona Davide CassaniLaboratoire de Physique Thorique, cole Normale Suprieure, Paris Alejandra CastroUniversity of Michigan Claudio Caviezel Max-Planck-Institut fr Physik, Mnchen Alessio Celi Universitat de Barcelona Anna Ceresole Istituto Nazionale di Fisica Nucleare, Universit di Torino Athanasios ChatzistavrakidisNational Technical University of Athens Wissam ChemissanyCentre for Theoretical Physics, University of Groningen Eugen-Mihaita CioroianuUniversity of Craiova Andres CollinucciTechnische Universitt Wien Paul CookUniversit di Roma, Tor Vergata Lorenzo CornalbaUniversit di Milano-Bicocca Aldo CotroneKatholieke Universiteit Leuven Ben Craps Vrije Universiteit, Brussel Stefano Cremonesi SISSA, Trieste Riccardo D'AuriaPolitecnico di Torino Gianguido Dall'AgataUniversity of Padova Jose A de AzcarragaUniversidad de Valencia Jan de BoerInstituut voor Theoretische Fysica, Universiteit van Amsterdam Sophie de BuylInstitut des Hautes tudes Scientifiques, Bures-sur-Yvette Marius de LeeuwUtrecht University Frederik De RooVrije Universiteit, Brussel Jan De Rydt Katholieke Universiteit Leuven and CERN, Geneva Bernard de WitInstitute for Theoretical Physics, Utrecht University Stephane DetournayIstituto Nazionale di Fisica Nucleare, Sezione di Milano Paolo Di Vecchia Niels Bohr Institute, Kbenhavn Eugen DiaconuUniversity of Craiova Vladimir Dobrev Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia Nick DoreyUniversity of Cambridge Hajar Ebrahim NajafabadiIPM, Tehran Federico Elmetti Universit di Milano Oleg Evnin Vrije Universiteit, Brussel Francesco Fiamberti Universit di Milano Davide Forcella SISSA, Trieste and CERN, Geneva Valentina Forini Humboldt-Universitt zu Berlin Angelos Fotopoulos Universit di Torino Denis Frank Universit de Neuchtel Marialuisa Frau Universit di Torino Matthias Gaberdiel Eidgenssische Technische Hochschule (ETH), Zrich Diego Gallego SISSA/ISAS, Trieste Maria Pilar Garcia del MoralIstituto Nazionale di Fisica Nucleare, Universit di Torino Valentina Giangreco Marotta Pulet

  19. Iron world and its astrobiological implications: The Tinto River case

    NASA Astrophysics Data System (ADS)

    Gomez, F.; Amils, A.

    2007-08-01

    Extreme ecosystems have recently attracted considerable interest, not only because they prove that life is robust and adaptable, but also because their existence increases the probability of finding life elsewhere in the universe. Most of the best characterized extreme habitats on Earth correspond to geophysical constraints to which opportunistic microorganisms have adapted. However, some extreme acidic environments are unique in that they are the product of biological activity (chemolithotrophy). The Tinto River (Huelva, Southwestern Spain) is an unusual acidic ecosystem (100 km long, mean pH of 2.3) containing a high concentration of heavy metals and an unexpected level of microbial diversity (1,2). In the past, the extreme conditions of the river were considered the result of intense mining activity. The geomicrobiological analysis of the Tinto ecosystem strongly suggests that these conditions are the result of the metabolic activity of chemolithotrophic prokaryotes, mainly iron-oxidizers (3). The system seems to be controlled by iron, which is not only used as an electron donor, but also as an electron acceptor, allowing a full iron cycle to operate. Furthermore, ferric iron is responsible for the maintenance of the constant pH of the ecosystem and can protect the different organisms thriving in its waters from radiation. Laminar, iron-rich stromatolitic formations are generated by the precipitation of different iron minerals on the surface of the biofilms that cover most of the rocks in the river and the riverbed. These structures are similar to ancient massive bioinduced laminated iron bioformations formed long before the first mining activities started in the area 5000 years ago. The existence of these ancient iron-rich deposits formed prior to any known mining activity, under hydrochemical conditions similar to modern deposits, is considered a strong argument in favor of a natural origin of the river (4,5). Recently, the source area of the Tinto ecosystem has been used like an environmental scenario for new technology validation for astrobiology space missions. M.A.R.T.E. (Mars Analog Research Technology Experiment) was a multidisciplinary project for technology development in the NAI framework. REFERENCES 1.- Lpez-Archilla, A.I., Marn, I., Amils, R. (2001) Microbial Ecol., 41: 20-35. 2.- Amaral-Zettler, L.A., Gmez, F., Zettler, E., Keenan, B.G., Amils, R., Sogin, M. (2002) Nature, 417: 137. 3.- Gonzlez-Toril, E., Gmez, F., Rodrguez, N., Fernndez-Remolar, D., Zuluaga, J., Marn, I., Amils, R., (2002) Hydrometall., in press. 4.- Amils, R., Gonzlez-Toril, E., Gmez, F., Fernndez-Remolar, D., Rodrguez, N. (2000) Spring Meeting American Geophysical Society, Abstract B22B-05. 5.- Fernndez-Remolar, D.C., Rodrguez, N., Gmez, F., Amils, R. (2003) J. Geophys. Res., 108, No.E7 doi. 10.1029/2002JE001918

  20. Yakima River Species Interactions Study; Yakima/Klickitat Fisheries Project Monitoring and Evaluation Report 7 of 7, 2003-2004 Annual Report.

    SciTech Connect

    Pearsons, Todd N.; Fritts, Anthony L.; Temple, Gabriel M.

    2004-05-01

    This report is intended to satisfy two concurrent needs: (1) provide a contract deliverable from the Washington Department of Fish and Wildlife (WDFW) to the Bonneville Power Administration (BPA), with emphasis on identification of salient results of value to ongoing Yakima/Klickitat Fisheries Project (YKFP) planning, and (2) summarize results of research that have broader scientific relevance. This is the twelfth of a series of progress reports that address species interactions research and supplementation monitoring of fishes in response to supplementation of salmon and steelhead in the upper Yakima River basin (Hindman et al. 1991; McMichael et al. 1992; Pearsons et al. 1993; Pearsons et al. 1994; Pearsons et al. 1996; Pearsons et al. 1998, Pearsons et al. 1999, Pearsons et al. 2001a, Pearsons et al. 2001b, Pearsons et al. 2002, Pearsons et al. 2003). Journal articles and book chapters have also been published from our work (McMichael 1993; Martin et al. 1995; McMichael et al. 1997; McMichael and Pearsons 1998; McMichael et al. 1998; Pearsons and Fritts 1999; McMichael et al. 1999; McMichael et al. 1999; Pearsons and Hopley 1999; Ham and Pearsons 2000; Ham and Pearsons 2001; Amaral et al. 2001; McMichael and Pearsons 2001; Pearsons 2002, Fritts and Pearsons 2004, Pearsons et al. in press, Major et al. in press). This progress report summarizes data collected between January 1, 2003 and December 31, 2003. These data were compared to findings from previous years to identify general trends and make preliminary comparisons. Interactions between fish produced as part of the YKFP, termed target species or stocks, and other species or stocks (non-target taxa) may alter the population status of non-target species or stocks. This may occur through a variety of mechanisms, such as competition, predation, and interbreeding (Pearsons et al. 1994; Busack et al. 1997; Pearsons and Hopley 1999). Furthermore, the success of a supplementation program may be limited by strong ecological interactions such as predation or competition (Busack et al. 1997). Our work has adapted to new information needs as the YKFP has evolved. Initially, our work focused on interactions between anadromous steelhead and resident rainbow trout (for explanation see Pearsons et al. 1993), then interactions between spring chinook salmon and rainbow trout, and recently interactions between spring chinook salmon and highly valued non-target taxa (NTT; e.g., bull trout); and interactions between strong interactor taxa (e.g., those that may strongly influence the abundance of spring chinook salmon; e.g., smallmouth bass) and spring chinook salmon. The change in emphasis to spring chinook salmon has largely been influenced by the shift in the target species planned for supplementation (Bonneville Power Administration et al. 1996; Fast and Craig 1997). Originally, steelhead and spring chinook salmon were proposed to be supplemented simultaneously (Clune and Dauble 1991). However, due in part to the uncertainties associated with interactions between steelhead and rainbow trout, spring chinook and coho salmon were supplemented before steelhead. This redirection in the species to be supplemented has prompted us to prioritize interactions between spring chinook and rainbow trout, while beginning to investigate other ecological interactions of concern. Prefacility monitoring of variables such as rainbow trout density, distribution, and size structure was continued and monitoring of other NTT was initiated in 1997. This report is organized into three chapters that represent major topics associated with monitoring stewardship, utilization, and strong interactor taxa. Chapter 1 reports the results of non-target taxa monitoring after the fifth release of hatchery salmon smolts in the upper Yakima River basin. Chapter 2 describes our tributary sampling methodology for monitoring the status of tributary NTT. Chapter 3 describes predation on juvenile salmonids by smallmouth bass and channel catfish in the lower Yakima River. The chapters in this report are in various stages of d

  1. Older Smooth Plains on Mercury Obscured by Impact Features

    NASA Astrophysics Data System (ADS)

    Byrne, P. K.; Denevi, B. W.; Klimczak, C.; Prockter, L. M.; Solomon, S. C.; Whitten, J.; Head, J. W.

    2012-12-01

    On the basis of morphology and spectral reflectance, the surface of Mercury can be broadly divided into three major terrain types: low-reflectance material, intermediate terrain, and smooth plains. This last terrain type is distinguished morphologically by a comparatively smooth and gently rolling surface, has a lower density of impact craters and basins than other surface units on the planet, and typically occupies low-lying areas. Their smooth texture, embayment of other landforms, and distinctive partial to complete burial of older impact features suggests that most of these plains are probably volcanic in nature. Recent mapping work has shown that smooth plains younger than the end of the late heavy bombardment (LHB) occupy ~30% of Mercury's surface. An outstanding question concerns the distribution and nature of older plains units on the planet, especially those that underlie large impact features and may correspond morphologically to smooth plains but have not yet been mapped accordingly. A preliminary survey of such terrain yielded five exemplar sites: at the Amaral (26.5S, 117.8E; 101 km diameter), Mickiewicz (23.2N, 256.7E; 103 km), and Vivaldi (13.8N, 274.1E; 212 km) basins and at two unnamed features at 53.1S, 38.6E (83 km in diameter) and 7.1N, 38.3E (118 km). We expect that more thorough mapping will uncover additional candidate areas. In each of the example sites, an extensive continuous ejecta deposit and secondary impact field characterize the proximal and distal facies, respectively, of the impact feature; and in each case, the secondaries field (and impact-sculpted terrain in the case of Vivaldi) is superposed upon patches of plains that otherwise appear smooth and host numerous, flooded antecedent craters tens of kilometers in diameter. Moreover, these smooth patches occur at several ranges of azimuths surrounding each crater or basin, suggesting that they may have formed contiguous units prior to formation of the younger impact feature. Although difficult to unequivocally demarcate the original boundaries of these older smooth plains units, a conservative minimum area of such plains is 300,000 km2 (~0.4% of Mercury's surface area) at each of these five sites. These observations therefore support the inference that the extent to which the surface of Mercury was covered by smooth plains before the end of the LHB is greater than that observed today. If most such plains had a volcanic origin, the innermost planet may have experienced major resurfacing events akin in nature, if not in scale, to that responsible for the expansive northern volcanic plains at several times in its history and at a number of locations. Further identification of older smooth plains will provide greater insight into the development of Mercury's crust, with attendant implications for the dynamics, composition, and magmatic history of the planet's interior.

  2. Yakima River Species Interactions Studies; Yakima/Klickitat Fisheries Project Monitoring and Evaluation, 2004-2005 Annual Report.

    SciTech Connect

    Pearsons, Todd N.; Temple, Gabriel M.; Fritts, Anthony L.

    2005-05-01

    This report is intended to satisfy two concurrent needs: (1) provide a contract deliverable from the Washington Department of Fish and Wildlife (WDFW) to the Bonneville Power Administration (BPA), with emphasis on identification of salient results of value to ongoing Yakima/Klickitat Fisheries Project (YKFP) planning, and (2) summarize results of research that have broader scientific relevance. This is the thirteenth of a series of progress reports that address species interactions research and supplementation monitoring of fishes in response to supplementation of salmon and steelhead in the upper Yakima River basin (Hindman et al. 1991; McMichael et al. 1992; Pearsons et al. 1993; Pearsons et al. 1994; Pearsons et al. 1996; Pearsons et al. 1998, Pearsons et al. 1999, Pearsons et al. 2001a, Pearsons et al. 2001b, Pearsons et al. 2002, Pearsons et al. 2003, Pearsons et al. 2004). Journal articles and book chapters have also been published from our work (McMichael 1993; Martin et al. 1995; McMichael et al. 1997; McMichael and Pearsons 1998; McMichael et al. 1998; Pearsons and Fritts 1999; McMichael et al. 1999; McMichael et al. 1999; Pearsons and Hopley 1999; Ham and Pearsons 2000; Ham and Pearsons 2001; Amaral et al. 2001; McMichael and Pearsons 2001; Pearsons 2002, Fritts and Pearsons 2004, Pearsons et al. in press, Major et al. in press). This progress report summarizes data collected between January 1, 2004 and December 31, 2004. These data were compared to findings from previous years to identify general trends and make preliminary comparisons. Interactions between fish produced as part of the YKFP, termed target species or stocks, and other species or stocks (non-target taxa) may alter the population status of non-target species or stocks. This may occur through a variety of mechanisms, such as competition, predation, and interbreeding (Pearsons et al. 1994; Busack et al. 1997; Pearsons and Hopley 1999). Furthermore, the success of a supplementation program may be limited by strong ecological interactions such as predation or competition (Busack et al. 1997). Our work has adapted to new information needs as the YKFP has evolved. Initially, our work focused on interactions between anadromous steelhead and resident rainbow trout (for explanation see Pearsons et al. 1993), then interactions between spring chinook salmon and rainbow trout, and recently interactions between spring chinook salmon and highly valued non-target taxa (NTT; e.g., bull trout); and interactions between strong interactor taxa (e.g., those that may strongly influence the abundance of spring chinook salmon; e.g., smallmouth bass) and spring chinook salmon. The change in emphasis to spring chinook salmon has largely been influenced by the shift in the target species planned for supplementation (Bonneville Power Administration et al. 1996; Fast and Craig 1997). Originally, steelhead and spring chinook salmon were proposed to be supplemented simultaneously (Clune and Dauble 1991). However, due in part to the uncertainties associated with interactions between steelhead and rainbow trout, spring chinook and coho salmon were supplemented before steelhead. This redirection in the species to be supplemented has prompted us to prioritize interactions between spring chinook and rainbow trout, while beginning to investigate other ecological interactions of concern. Prefacility monitoring of variables such as rainbow trout density, distribution, and size structure was continued and monitoring of other NTT was initiated in 1997. This report is organized into five chapters that represent major topics associated with monitoring stewardship, utilization, and strong interactor taxa. Chapter 1 reports the results of non-target taxa monitoring after the sixth release of hatchery salmon smolts in the upper Yakima River Basin. Chapter 2 reports on the impacts of supplementation and reintroduction of salmon to trout. Chapter 2 was submitted as a manuscript to the North American Journal of Fisheries Management. Chapter 3 is an essay that describes the problems associated

  3. OT2_tvelusam_4: Probing Galactic Spiral Arm Tangencies with [CII

    NASA Astrophysics Data System (ADS)

    Velusamy, T.

    2011-09-01

    We propose to use the unique viewing geometry of the Galactic spiral arm tangents , which provide an ideal environment for studying the effects of density waves on spiral structure. We propose a well-sampled map of the[C II] 1.9 THz line emission along a 15-degree longitude region across the Norma-3kpc arm tangential, which includes the edge of the Perseus Arm. The COBE-FIRAS instrument observed the strongest [C II] and [N II] emission along these spiral arm tangencies.. The Herschel Open Time Key Project Galactic Observations of Terahertz C+ (GOT C+), also detects the strongest [CII] emission near these spiral arm tangential directions in its sparsely sampled HIFI survey of [CII] in the Galactic plane survey. The [C II] 158-micron line is the strongest infrared line emitted by the ISM and is an excellent tracer and probe of both the diffuse gases in the cold neutral medium (CNM) and the warm ionized medium (WIM). Furthermore, as demonstrated in the GOTC+ results, [C II] is an efficient tracer of the dark H2 gas in the ISM that is not traced by CO or HI observations. Thus, taking advantage of the long path lengths through the spiral arm across the tangencies, we can use the [C II] emission to trace and characterize the diffuse atomic and ionized gas as well as the diffuse H2 molecular gas in cloud transitions from HI to H2 and C+ to C and CO, throughout the ISM. The main goal of our proposal is to use the well sampled (at arcmin scale) [C II] to study these gas components of the ISM in the spiral-arm, and inter-arm regions, to constrain models of the spiral structure and to understand the influence of spiral density waves on the Galactic gas and the dynamical interaction between the different components. The proposed HIFI observations will consist of OTF 15 degree longitude scans and one 2-degree latitude scan sampled every 40arcsec across the Norma- 3kpc Perseus Spiral tangency.

  4. VLT/UVES spectroscopy of Wray 977, the hypergiant companion to the X-ray pulsar GX301-2

    E-print Network

    Kaper, L; Najarro, F

    2006-01-01

    Model atmosphere fits to high-resolution optical spectra of Wray 977 confirm the B hypergiant classification of the massive companion to the X-ray pulsar GX301-2. The models give a radius of 62 Rsun, an effective temperature of 18,100 K and a luminosity of 5 x 10^^5 Lsun. The deduced mass-loss rate and terminal velocity of the stellar wind are 10^^-5 Msun/yr and 305 km/s, respectively. The interstellar Na I D absorption indicates that Wray 977 is located behind the first intersection with the Sagittarius-Carina spiral arm (1-2.5 kpc) and probably belongs to the stellar population of the Norma spiral arm at a distance of 3-4 kpc. The spectra obtained with UVES on the Very Large Telescope (VLT) cover a full orbit of the system, including periastron passage, from which we derive the radial-velocity curve of the B hypergiant. The measured radial-velocity amplitude is 10 +/-3 km/s yielding a mass ratio q = 0.046 +/- 0.014. The absence of an X-ray eclipse results in a lower limit to the mass of Wray 977 of 39 Msun....

  5. Los plaguicidas y la contaminacion del medio ambiente Venezolano

    USGS Publications Warehouse

    Stickel, L.F.; Stickel, W.H.

    1972-01-01

    RESUMEN DE RECOMENDACIONES Recomendaciones para el Programa de Investigacion: 1. Establecer un sistema de muestreo biologico para detectar los niveles tendencias de los productos quimicos toxicos en un peque?o numero de si tios representativos. 2. Mantener continua vigilancia de la contaminacion ambiental, mediante la seleccion acertadamente dirigida de las zonas afectadas y de las fuentes de contaminacion. 3. Realizar estudios acerca de las poblaciones de animales silvestres, y del exito de los procesos reproductivos de las especies o grupos clayes de animales que se consideran mas gravemente afectados. 4. Preparar recomendaciones para una accion gubernamental de proteccion al hombre, a la fauna silvestre y al medio ambiente. Recomendaciones para la Accion Administrativa: 1. Establecer limites a la tolerancia de los residuos de plaguicidas en los alimentos. Constituye una medida clave para disminuir la contaminacion ambiental. 2. Establecer normas de calidad del agua para las corrientes, represas, la gos y otros cuerpos. Es la segunda medida clave para reducir la contaminacion del ambiente 3. Exigir un tratamiento adecuado de los efluentes industriales, especialmente antes de que se construyan las nuevas plantas. 4. Exigir a los agricultores que en el uso de plaguicidas sigan los consejos tecnicos autorizados y negar a los vendedores el derecho a recomendar productos por su cuenta. 5. Tomar medidas para recoger y eliminar los recipientes y sobrantes de los plaguicidas.

  6. Facial patterns in Cercopithecoidea and Hominoidea: a geometric approach.

    PubMed

    Hardt, Thorolf; Henke, Winfried

    2006-06-01

    The maxillofacial and orbital compartments of the primate skull contribute to the ontogenetic and phylogenetic variability of the viscerocranium and are of crucial evolutionary relevance. As the form of organisms changes depending on endo- and exogenous factors, metrical evaluation of specific adaptations and incorporation of the results into a biological framework could be helpful in identifying valid characters for separation of taxa (e.g. family, genus, and species) and in understanding divergence and convergence. During the last two decades a morphometric "revolution" heralded by Rohlf & Marcus (1993), Adams et al. (2004) and Oxnard (2004) brought about a synthesis of traditional quantitative-morphometrical with modern methods. This approach is called "Geometric Morphometrics (GM)" and constitutes the coremethod applied here. Based on standardized photographs (in Norma frontalis), landmarks (LM) were set and two-dimensional coordinates (X, Y) recorded for the facial cranium in selected representatives of the superfamilies Cercopithecoidea and Hominoidea. The comparison of two datasets by means of factor analysis and distance computation for the complete maxillofacial complex on the one hand, and circumorbital and orbital features on the other, indicate that morphological differences between super-families and genera are valid for separating them even in a heterogeneous sample like the one presented here. Including more landmarks and therewith capturing the morph in a more complex way optimizes separation within the sample. PMID:16850765

  7. Normal-conducting scaling fixed field alternating gradient accelerator for proton therapy

    NASA Astrophysics Data System (ADS)

    Garland, J. M.; Appleby, R. B.; Owen, H.; Tygier, S.

    2015-09-01

    In this paper we present a new lattice design for a 30-350 MeV scaling fixed-field alternating gradient accelerator for proton therapy and tomographyNORMA (NOrmal-conducting Racetrack Medical Accelerator). The energy range allows the realization of proton computed tomography and utilizes normal conducting magnets in both a conventional circular ring option and a novel racetrack configuration, both designed using advanced optimization algorithms we have developed in pyzgoubi. Both configurations consist of ten focusing-defocusing-focusing triplet cells and operate in the second stability region of Hills equation. The ring configuration has a circumference of 60 m, a peak magnetic field seen by the beam of <1.6 T , a maximum horizontal orbit excursion of 44 cm and a dynamic aperture of 68 mm mraddetermined using a novel dynamic aperture (DA) calculation technique. The racetrack alternative is realized by adding magnet-free drift space in between cells at two opposing points in the ring, to facilitate injection and extraction. Our racetrack design has a total magnet-free straight lengths of 4.9 m, a circumference of 71 m, a peak magnetic field seen by the beam of <1.74 T , a maximum horizontal orbit excursion of 50 cm and a DA of 58 mm mrad. A transverse magnet misalignment model is also presented for the ring and racetrack configurations where the DA remains above 40 mm mrad for randomly misaligned error distributions with a standard deviation up to 100 ? m .

  8. The Supernova Remnant CTA 1

    NASA Technical Reports Server (NTRS)

    Seward, Frederick D.

    1996-01-01

    The supernova remnants G327.1-1.1 and G327.4+0.4 (Kes 27) are located 1.5 deg apart in the constellation Norma. In 1980, Einstein IPC observations discovered that both were irregular filled-center X-ray sources with possible point sources superposed. This paper describes new ROSAT position sensitive proportional counter (PSPC) observations which both map the diffuse structure and clearly show several unresolved sources in each field. Both remnants have bright emitting regions inside the limb which might indicate the presence of high energy electrons accelerated by a pulsar. The interior region is more prominent in G327.1-1.1 than in Kes 27. The spectra are relatively strongly absorbed, as expected from distant remnants close to the galactic plane. Comparison of the X-ray and radio maps of each remnant allows us to attribute some emission to a shell and some to the interior. With this information, a blast-wave model is used to derive approximate ages and energy release. Indications are that the Kes 27 supernova deposited approximately 10(exp 51) ergs in the surrounding medium. The G327.1-1.1 event probably deposited a factor of 3-10 less.

  9. Three-Dimensional Distribution of the ISM in the Milky Way Galaxy: III. The Total Neutral Gas Disk

    E-print Network

    Nakanishi, Hiroyuki

    2015-01-01

    We present newly obtained three-dimensional gaseous maps of the Milky Way Galaxy; HI, H$_2$ and total-gas (HI plus H$_2$) maps, which were derived from the HI and $^{12}$CO($J=1$--0) survey data and rotation curves based on the kinematic distance. The HI and H$_2$ face-on maps show that the HI disk is extended to the radius of 15--20 kpc and its outskirt is asymmetric to the Galactic center, while most of the H$_2$ gas is distributed inside the solar circle. The total gas mass within radius 30 kpc amounts to $8.0\\times 10^9$ M$_\\odot$, 89\\% and 11\\% of which are HI and H$_2$, {respectively}. The vertical slices show that the outer HI disk is strongly warped and the inner HI and H$_2$ disks are corrugated. The total gas map is advantageous to trace spiral structure from the inner to outer disk. Spiral structures such as the Norma-Cygnus, the Perseus, the Sagittarius-Carina, the Scutum-Crux, and the Orion arms are more clearly traced in the total gas map than ever. All the spiral arms are well explained with lo...

  10. Highlights of multi-wavelengths surveys in the Zone of Avoidance

    E-print Network

    R. C. Kraan-Korteweg; K. J. van der Heyden; M. E. Cluver; P. A. Woudt

    2008-10-21

    Rather than giving a complete overview on extragalactic Zone of Avoidance research, this paper will highlight some recent discoveries in the ZOA, such as new NIR to FIR observations (IRSF, Spitzer) of the most massive disk galaxy found to-date (HIZOA 0836-43), and deep multi-wavelength observations of a spiral galaxy WKK 6167 undergoing transformation while infalling along the Great Attractor Wall into the Norma cluster - reminiscent of similar incidences observed in two galaxies at higher redshifts (z ~ 0.2). While the recent systematic multi-wavelengths approaches to uncover the large-scale structure of galaxies across the ZOA have proven quite successful, in particular in the Great Attractor region, they lack the required depth to answer open questions with regard to our understanding of the dynamics in the Local Universe. The actual mass distribution is poorly understood and does not satisfactorily explain the observed peculiar velocity fields and the CMB dipole. We will present future HI survey strategies to be pursued with the South African SKA Pathfinder MeerKAT in the ZOA, that can - amongst others - resolve the long-standing Great Attractor/Shapley controversy, and determine at which distance range the cumulative peculiar motion of the Local Group flattens off and the Universe becomes homogeneous.

  11. Spiral structure of the Third Galactic Quadrant and the solution to the Canis Major debate

    E-print Network

    A. Moitinho; R. A. Vazquez; G. Carraro; G. Baume; E. E Giorgi; W. Lyra

    2006-02-22

    With the discovery of the Sagittarius dwarf spheroidal (Ibata et al. 1994), a galaxy caught in the process of merging with the Milky Way, the hunt for other such accretion events has become a very active field of astrophysical research. The identification of a stellar ring-like structure in Monoceros, spanning more than 100 degrees (Newberg et al. 2002), and the detection of an overdensity of stars in the direction of the constellation of Canis Major (CMa, Martin et al. 2004), apparently associated to the ring, has led to the widespread belief that a second galaxy being cannibalised by the Milky Way had been found. In this scenario, the overdensity would be the remaining core of the disrupted galaxy and the ring would be the tidal debris left behind. However, unlike the Sagittarius dwarf, which is well below the Galactic plane and whose orbit, and thus tidal tail, is nearly perpendicular to the plane of the Milky Way, the putative CMa galaxy and ring are nearly co-planar with the Galactic disk. This severely complicates the interpretation of observations. In this letter, we show that our new description of the Milky Way leads to a completely different picture. We argue that the Norma-Cygnus spiral arm defines a distant stellar ring crossing Monoceros and the overdensity is simply a projection effect of looking along the nearby local arm. Our perspective sheds new light on a very poorly known region, the third Galactic quadrant (3GQ), where CMa is located.

  12. Exploring Cultural Heritage Resources in a 3d Collaborative Environment

    NASA Astrophysics Data System (ADS)

    Respaldiza, A.; Wachowicz, M.; Vzquez Hoehne, A.

    2012-06-01

    Cultural heritage is a complex and diverse concept, which brings together a wide domain of information. Resources linked to a cultural heritage site may consist of physical artefacts, books, works of art, pictures, historical maps, aerial photographs, archaeological surveys and 3D models. Moreover, all these resources are listed and described by a set of a variety of metadata specifications that allow their online search and consultation on the most basic characteristics of them. Some examples include Norma ISO 19115, Dublin Core, AAT, CDWA, CCO, DACS, MARC, MoReq, MODS, MuseumDat, TGN, SPECTRUM, VRA Core and Z39.50. Gateways are in place to fit in these metadata standards into those used in a SDI (ISO 19115 or INSPIRE), but substantial work still remains to be done for the complete incorporation of cultural heritage information. Therefore, the aim of this paper is to demonstrate how the complexity of cultural heritage resources can be dealt with by a visual exploration of their metadata within a 3D collaborative environment. The 3D collaborative environments are promising tools that represent the new frontier of our capacity of learning, understanding, communicating and transmitting culture.

  13. [The federal government discourse during the political decentralization process and the obstacles to implement the Brazilian Public Health Care System].

    PubMed

    Pellegrini, Brbara

    2007-01-01

    A discourse analysis carried out on basic operating standard Norma Operacional Bsica do Sistema Unico de Sade (NOB-SUS 01/96) of the Brazilian public health care system aiming at locating signs that could allow to identify lines of thought which have influenced health care policies prioritized by the federal administration. The author points out a peculiarity in the kind of discourse employed by the ministry directive: its structure is based on isolated aspects of legislation and on ideas advocated by other discourse communities, articulated with redefined legal principles - an effort towards authorizing the official reasoning in favor of the relevance in keeping the decentralization process under the control of the federal administration. The analysis concludes that an infra-legal standard can neither grant state and federal administrations a hierarchical superiority (mediation function) over municipal administrations, nor can it transfer the legal responsibilities pertaining to Health Councils over to inter-administration commissions (Comisses Intergestores) , thus making the former mere decision ratifiers. This study found that granting privileges not contemplated in the legislation to state and federal administrations surfaced again and more strongly so in 2001 in yet another operating standard. PMID:17680087

  14. Improved SOT (Hinode mission) high resolution solar imaging observations

    E-print Network

    Goodarzi, Hadis; Adjabshirizadeh, Ali

    2015-01-01

    We consider the best today available observations of the Sun free of turbulent Earth atmospheric effects, taken with the Solar Optical Telescope (SOT) onboard the Hinode spacecraft. Both the instrumental smearing and the observed stray light are analyzed in order to improve the resolution. The Point Spread Function (PSF) corresponding to the blue continuum Broadband Filter Imager (BFI) near 450 nm is deduced by analyzing i/ the limb of the Sun and ii/ images taken during the transit of the planet Venus in 2012. A combination of Gaussian and Lorentzian functions is selected to construct a PSF in order to remove both smearing due to the instrumental diffraction effects (PSF core) and the large-angle stray light due to the spiders and central obscuration (wings of the PSF) that are responsible for the parasitic stray light. A Max-likelihood deconvolution procedure based on an optimum number of iterations is discussed. It is applied to several solar field images, including the granulation near the limb. The norma...

  15. Rings and ladders in biology - fast ab initio simulations of polypeptides and DNA.

    NASA Astrophysics Data System (ADS)

    Lewis, James P.

    1996-03-01

    Throughout the years, developments of first principles methods have allowed a theoretical investigation of a wide variety of materials from semiconductors to zeolites. However, ab initio methods have not been widespread in the area of large biological systems. Several recent advances in theoretical techniques have prompted us to examine the possibility of simulating large biological systems. Linear scaling methods have been developed to avoid the N^3 computational roadblock due to matrix diagonalization, and a hydrogen-bonding model has been developed to correctly model weak intermolecular interactions within a tight-binding like local orbital framework.(J. Ortega, J. P. Lewis, O. F. Sankey Phys. Rev. B. 50), 10516 (1994); J. P. Lewis and O. F. Sankey, Biophys. J. 69, 1068 (1995). With these developments, a simulation of a dehydrated 10 basepair poly(dG) -- poly(dC) segment of DNA will be described. Results for the electronic structure of this relaxed structure will be discussed. In addition, a simulation of this relaxed structure, involving 1932 steps, was performed to determine the dynamical matrix. The corresponding vibrational spectrum was found and trends will be compared with experimental work.(Work done in collaboration with Otto F. Sankey and Pablo Ordejn) In addition, theoretical results on the energetics, electronic, vibrational and elastic properties of cyclic peptide systems cyclo[(D-Ala-Glu-D-Ala-Gln)_m], where m=1-4, will be presented. Experimentally, these cyclic peptide nanotubes have been shown to be excellent for transporting of ions and glucose across membranes, the attempt to simulate the placement of a dopant into the nanotube structure and the effects on the electronic structure will be discussed.(Work done in collaboration with Otto F. Sankey and Norma H. Pawley)

  16. Evaluation Metrics for the Paragon XP/S-15

    NASA Technical Reports Server (NTRS)

    Traversat, Bernard; McNab, David; Nitzberg, Bill; Fineberg, Sam; Blaylock, Bruce T. (Technical Monitor)

    1993-01-01

    On February 17th 1993, the Numerical Aerodynamic Simulation (NAS) facility located at the NASA Ames Research Center installed a 224 node Intel Paragon XP/S-15 system. After its installation, the Paragon was found to be in a very immature state and was unable to support a NAS users' workload, composed of a wide range of development and production activities. As a first step towards addressing this problem, we implemented a set of metrics to objectively monitor the system as operating system and hardware upgrades were installed. The metrics were designed to measure four aspects of the system that we consider essential to support our workload: availability, utilization, functionality, and performance. This report presents the metrics collected from February 1993 to August 1993. Since its installation, the Paragon availability has improved from a low of 15% uptime to a high of 80%, while its utilization has remained low. Functionality and performance have improved from merely running one of the NAS Parallel Benchmarks to running all of them faster (between 1 and 2 times) than on the iPSC/860. In spite of the progress accomplished, fundamental limitations of the Paragon operating system are restricting the Paragon from supporting the NAS workload. The maximum operating system message passing (NORMA IPC) bandwidth was measured at 11 Mbytes/s, well below the peak hardware bandwidth (175 Mbytes/s), limiting overall virtual memory and Unix services (i.e. Disk and HiPPI I/O) performance. The high NX application message passing latency (184 microns), three times than on the iPSC/860, was found to significantly degrade performance of applications relying on small message sizes. The amount of memory available for an application was found to be approximately 10 Mbytes per node, indicating that the OS is taking more space than anticipated (6 Mbytes per node).

  17. SU-E-T-249: Neutron Model Upgrade for Radiotherapy Patients Monitoring Using a New Online Detector

    SciTech Connect

    Irazola, L; Sanchez Doblado, F.; Lorenzoli, M; Pola, A.; Terron, J.A.; Bedogni, R.; Sanchez Nieto, B.; Romero-Exposito, M.

    2014-06-01

    Purpose: The purpose of this work is to improve the existing methodology to estimate neutron equivalent dose in organs during radiotherapy treatments, based on a Static Random Access Memory neutron detector (SRAMnd) [1]. This is possible thanks to the introduction of a new digital detector with improved characteristics, which is able to measure online the neutron fluence rate in the presence of an intense photon background [2]. Its reduced size, allows the direct estimation of doses in specific points inside an anthropomorphic phantom (NORMA) without using passive detectors as TLD or CR-39. This versatility will allow not only to improve the existing models (generic abdomen and H and N [1]) but to generate more specific ones for any technique. Methods: The new Thermal Neutron Rate Detector (TNRD), based on a diode device sensitized to thermal neutrons, have been inserted in 16 points of the phantom. These points are distributed to infer doses to specific organs. Simultaneous measurements of these devices and a reference one, located in front of the gantry, have been performed for the mentioned generic treatments, in order to improve the existing model. Results: These new devices have shown more precise since they agree better with Monte Carlo simulations. The comparison of the thermal neutron fluence, measured with TNRD, and the existing models, converted from events to fluence, shows an average improvement of (3.903.37) % for H and N and (12.619.43) % for abdomen, normalized to the maximum value. Conclusion: This work indicates the potential of these new devices for more precise neutron equivalent dose estimation in organs, as a consequence of radiotherapy treatments. The simplicity of the process makes possible to establish more specific models that will provide a better dose estimation. References[1] Phys Med Biol 2012; 57:61676191.[2] A new active thermal neutron detector. Radiat. Prot. Dosim. (in press)

  18. Effect of molybdenum treatment on molybdenum concentration and nitrate reduction in maize seedlings.

    PubMed

    Kovcs, Bla; Pusks-Preszner, Anita; Huzsvai, Lszl; Lvai, Lszl; Bdi, va

    2015-11-01

    Since 1940 molybdenum has been known as an essential trace element in plant nutrition and physiology. It has a central role in nitrogen metabolism, and its deficiency leads to nitrate accumulation in plants. In this study, we cultivated maize seedlings (Zea mays L. cv. Norma SC) in nutrient solution and soil (rhizoboxes) to investigate the effect of molybdenum treatment on the absorption of molybdenum, sulfur and iron. These elements have been previously shown to play important roles in nitrate reduction, because they are necessary for the function of the nitrate reductase enzyme. We also investigated the relationship between molybdenum treatments and different nitrogen forms in maize. Molybdenum treatments were 0, 0.96, 9.6 and 96?gkg(-1) in the nutrition solution experiments, and 0, 30, 90, 270mgkg(-1) in the rhizobox experiments. On the basis of our results, the increased Mo level produced higher plant available Mo concentration in nutrient solution and in soil, which resulted increased concentration of Mo in shoots and roots of maize seedlings. In addition it was observed that maize seedlings accumulated more molybdenum in their roots than in their shoots at all treatments. In contrast, molybdenum treatments did not affect significantly either iron or sulfur concentrations in the plant, even if these elements (Mo, S and Fe) play alike important roles in nitrogen metabolism. Furthermore, the physiological molybdenum level (1 Mo=0.01?M) reduced NO3-N and enhanced the NH4-N concentrations in seedlings, suggesting that nitrate reduction was more intense under a well-balanced molybdenum supply. PMID:26226599

  19. A First Calibration of SBF using Mulit-Conjugate Adaptive Optics

    NASA Astrophysics Data System (ADS)

    Gibson, Zachary; Jensen, Joseph B.; Blakeslee, John; Schirmer, Mischa

    2016-01-01

    We measured Surface Brightness Fluctuations (SBF) in three galaxies, ESO137-G006, NGC 3309, and NGC 5128, using the GeMS Multi-Conjugate Adaptive Optics (MCAO) system on the Gemini South telescope. ESO137-G006 is located in the Norma Cluster, NGC 3309 is located in the Hydra Cluster, while NGC 5128, also known as Centaurus A, is a nearby galaxy with numerous other distance measurements, including Cepheids. These galaxies were observed as a pathfinder to establish the SBF technique using the MCAO system.The J and K-band images taken with MCAO were astrometrically corrected and combined using the THELI software. This method allowed us to accurately account for the distortions of the focal plane when combining the images. The foreground stars as well as the globular clusters were measured to account for their contribution to the SBF. J-K color measurements were made to calibrate SBF and determine the stellar populations of the galaxies.The results of these measurements give us an SBF calibration that we can use to measure the distances to much more distant galaxies. Accurate distances are needed to determine the true spatial motions of galaxies and measure the mass distribution and density of the Universe. We now live in the era of "precision cosmology" in which distance measurements have transformed our understanding of the composition of the Universe and revealed the presence of Dark Matter and Dark Energy, the two dominant (but still unidentified) components of the Universe. The origins and nature of Dark Matter and Dark Energy are among the most important unsolved mysteries in physics.

  20. gamma-rays from annihilating dark matter in galaxy clusters: stacking vs single source analysis

    E-print Network

    E. Nezri; R. White; C. Combet; J. A. Hinton; D. Maurin; E. Pointecouteau

    2012-06-11

    Clusters of galaxies are potentially important targets for indirect searches for dark matter annihilation. Here we reassess the detection prospects for annihilation in massive halos, based on a statistical investigation of 1743 clusters in the new Meta-Catalog of X-ray Clusters. We derive a new limit for the extra-galactic dark matter annihilation background of at least 20% of that originating from the Galaxy for an integration angle of 0.1 deg. The number of clusters scales as a power law with their brightness, suggesting that stacking may provide a significant improvement over a single target analysis. The mean angle containing 80% of the dark-matter signal for the sample is ~0.15 deg, indicating that instruments with this angular resolution or better would be optimal for a cluster annihilation search based on stacking. A detailed study based on the Fermi-LAT performance and position-dependent background, suggests that stacking may result in a factor ~2 improvement in sensitivity, depending on the source selection criteria. Based on the expected performance of CTA, we find no improvement with stacking, due to the requirement for pointed observations. We note that several potentially important targets: Opiuchius, A2199, A3627 (Norma) and CIZAJ1324.7-5736 may be disfavoured due to a poor contrast with respect to the Galactic dark-matter signal. The use of the homogenised MCXC meta-catalogue provides a robust ranking of the targets, although the absolute value of their signal depends on the exact dark matter substructure content. For conservative assumptions, we find that galaxy clusters (with or without stacking) can probe down to 1e-25-1e-24 cm3/s for dark matter masses in the range 10 GeV-100 GeV. For more favourable substructure configurations, ~1e-26 cm3/s may be reached.

  1. MUSE sneaks a peek at extreme ram-pressure stripping events - I. A kinematic study of the archetypal galaxy ESO137-001

    NASA Astrophysics Data System (ADS)

    Fumagalli, Michele; Fossati, Matteo; Hau, George K. T.; Gavazzi, Giuseppe; Bower, Richard; Sun, Ming; Boselli, Alessandro

    2014-12-01

    We present Multi Unit Spectroscopic Explorer (MUSE) observations of ESO137-001, a spiral galaxy infalling towards the centre of the massive Norma cluster at z 0.0162. During the high-velocity encounter of ESO137-001 with the intracluster medium, a dramatic ram-pressure stripping event gives rise to an extended gaseous tail, traced by our MUSE observations to >30 kpc from the galaxy centre. By studying the H? surface brightness and kinematics in tandem with the stellar velocity field, we conclude that ram pressure has completely removed the interstellar medium from the outer disc, while the primary tail is still fed by gas from the inner regions. Gravitational interactions do not appear to be a primary mechanism for gas removal. The stripped gas retains the imprint of the disc rotational velocity to 20 kpc downstream, without a significant gradient along the tail, which suggests that ESO137-001 is fast moving along a radial orbit in the plane of the sky. Conversely, beyond 20 kpc, a greater degree of turbulence is seen, with velocity dispersion up to ?100 km s-1. For a model-dependent infall velocity of vinf 3000 km s-1, we conclude that the transition from laminar to turbulent flow in the tail occurs on time-scales ?6.5 Myr. Our work demonstrates the terrific potential of MUSE for detailed studies of how ram-pressure stripping operates on small scales, providing a deep understanding of how galaxies interact with the dense plasma of the cluster environment.

  2. Three-dimensional distribution of the ISM in the Milky Way galaxy. III. The total neutral gas disk

    NASA Astrophysics Data System (ADS)

    Nakanishi, Hiroyuki; Sofue, Yoshiaki

    2015-11-01

    We present newly obtained three-dimensional gaseous maps of the Milky Way Galaxy: H I, H2, and total-gas (H I plus H2) maps, which were derived from the H I and 12CO(J = 1-0) survey data and rotation curves based on the kinematic distance. The H I and H2 face-on maps show that the H I disk is extended to a radius of 15-20 kpc and its outskirts are asymmetric to the Galactic center, while most of the H2 gas is distributed inside the solar circle. The total gas mass within a radius of 30 kpc amounts to 8.0 109 M?, 89% and 11% of which are H I and H2, respectively. The vertical slices show that the outer H I disk is strongly warped and the inner H I and H2 disks are corrugated. The total gas map is advantageous for tracing spiral structures from the inner to outer disk. Spiral structures such as the Norma-Cygnus, the Perseus, the Sagittarius-Carina, the Scutum-Crux, and the Orion arms are more clearly traced in the total gas map than ever. All the spiral arms are well explained by logarithmic spiral arms with pitch angles of 11-15. The molecular fraction of the total gas is high near the Galactic center and decreases with Galactocentric distance. The molecular fraction is also locally enhanced at the spiral arms compared with the inter-arm regions.

  3. Identifications of Four Integral Sources in the Galactic Plane via CHANDRA Localizations

    NASA Technical Reports Server (NTRS)

    Tomsick, John A.; Chaty, Sylvain; Rodriquez, Jerome; Foschini, Luigi; Walter, Roland; Kaaret, Philip

    2006-01-01

    Hard X-ray imaging of the Galactic plane by the INTEGRAL satellite is uncovering large numbers of 20-100 keV "IGR" sources. We present results from Chandra, INTEGRAL, optical, and IR observations of four IGR sources: three sources in the Norma region of the Galaxy(1GR J16195-4945,IGR J16207-5129, and IGR J16167-4957) and one that is closer to the Galactic center (IGR 5171 95-4100). In all four cases, one relatively bright Chandra source is seen in the INTEGRAL error circle, and these are likely to be the soft X-ray counterparts of the IGR sources. They have hard 0.3-10 keV spectra with power-law photon indices of Gamma = 0.5-1.1. While many previously studied IGR sources show high column densities (NH approx. 10(exp 23)-10(exp 24)/sq cm), only IGR J16195-4945 has a column density that could be as high as 10(exp 23)/sq cm. Using optical and IR sky survey catalogs and our own photometry, we have obtained identifications for all four sources. The J-band magnitudes are in the range 14.9-10.4, and we have used the optical/IR spectral energy distributions (SEDs) to constrain the nature of the sources. Blackbody components with temperature lower limits of >9400 K for IGR J16195-4945 and >18,000 K for IGR J16207-5129 indicate that these are very likely high-mass X-ray binaries (HMXBs). However, for IGR 516167-4957 and IGR J17195-4100, low extinction and the SEDs indicate later spectral types for the putative companions, suggesting that these are not HMXBs.

  4. The Three-mm Ultimate Mopra Milky Way Survey. II.Cloud and Star Formation near the Filamentary Ministarburst RCW 106

    NASA Astrophysics Data System (ADS)

    Nguy?n, Hans; Nguy?n Lu'o'ng, Quang; Martin, Peter G.; Barnes, Peter J.; Muller, Erik; Lowe, Vicki; Lo, Nadia; Cunningham, Maria; Motte, Frdrique; Indermhle, B.; O'Dougherty, Stefan N.; Hernandez, Audra K.; Fuller, Gary A.

    2015-10-01

    We report here a study of gas, dust, and star formation rates (SFRs) in the molecular cloud complexes (MCCs) surrounding the giant H ii region RCW 106 using 12CO and 13CO(1-0) data from the Three-mm Ultimate Mopra Milky way Survey and archival data. We separate the emission in the Galactic Plane around l = 330-335 and b = -1-1 into two main MCCs: the RCW 106 (VLSR = -48 km s-1) complex and the MCC331-90 (VLSR = -90 km s-1) complex. While RCW 106 (M 5.9 {10}6 {M}? ) is located in the Scutum-Centaurus arm at a distance of 3.6 kpc, MCC331-90 (M 2.8 {10}6 {M}? ) is in the Norma arm at a distance of 5 kpc. Their molecular gas mass surface densities are 220 and 130 {M}? pc-2, respectively. For the RCW 106 complex, using the 21 cm continuum fluxes and dense clumps counting, we obtain immediate past (-0.2 Myr) and immediate future (+0.2 Myr) SFRs of {0.25}-0.023+0.09 {M}? {{yr}}-1 and 0.12+/- 0.1 {M}? {{yr}}-1. This results in an immediate past SFR density of {9.5}-0.9+3.4 {M}? {{yr}}-1 {{kpc}}-2 and an immediate future SFR density of {4.8}-3.8+3.8 {M}? {{yr}}-1 {{kpc}}-2. As both SFRs are higher than the ministarburst threshold, they must be undergoing a ministarburst event although burst peak has already passed. This is one of the most active star forming complexes in the southern sky that is ideal for further investigations of massive star formation and potentially shedding light on the physics of high-redshift starbursts.

  5. The Scientist as Sentinel (Invited)

    NASA Astrophysics Data System (ADS)

    Oreskes, N.

    2013-12-01

    Scientists have been warning the world for some time about the risks of anthropogenic interference in the climate system. But we struggle with how, exactly, to express that warning. The norms of scientific behavior enjoin us from the communication strategies normally associated with warnings. If a scientist sounds excited or emotional, for example, it is often assumed that he has lost his capacity to assess data calmly and therefore his conclusions are suspect. If the scientist is a woman, the problem is that much worse. In a recently published article my colleagues and I have shown that scientists have systematically underestimated the threat of climate change (Brysse et al., 2012). We suggested that this occurs for normative reasons: The scientific values of rationality, dispassion, and self-restraint lead us to demand greater levels of evidence in support of surprising, dramatic, or alarming conclusions than in support of less alarming conclusions. We call this tendency 'erring on the side of least drama.' However, the problem is not only that we err on the side of least drama in our assessment of evidence, it's also that we speak without drama, even when our conclusions are dramatic. We speak without the emotional cadence that people expect to hear when the speaker is worried. Even when we are worried, we don't sound as if we are. In short, we are trying to act as sentinels, but we lack the register with which to do so. Until we find those registers, or partner with colleagues who are able to speak in the cadences that communicating dangers requires, our warnings about climate change will likely continue to go substantially unheeded.

  6. Three-dimensional distribution of the ISM in the Milky Way galaxy. III. The total neutral gas disk

    NASA Astrophysics Data System (ADS)

    Nakanishi, Hiroyuki; Sofue, Yoshiaki

    2015-12-01

    We present newly obtained three-dimensional gaseous maps of the Milky Way Galaxy: H I, H2, and total-gas (H I plus H2) maps, which were derived from the H I and 12CO(J = 1-0) survey data and rotation curves based on the kinematic distance. The H I and H2 face-on maps show that the H I disk is extended to a radius of 15-20 kpc and its outskirts are asymmetric to the Galactic center, while most of the H2 gas is distributed inside the solar circle. The total gas mass within a radius of 30 kpc amounts to 8.0 109 M?, 89% and 11% of which are H I and H2, respectively. The vertical slices show that the outer H I disk is strongly warped and the inner H I and H2 disks are corrugated. The total gas map is advantageous for tracing spiral structures from the inner to outer disk. Spiral structures such as the Norma-Cygnus, the Perseus, the Sagittarius-Carina, the Scutum-Crux, and the Orion arms are more clearly traced in the total gas map than ever. All the spiral arms are well explained by logarithmic spiral arms with pitch angles of 11-15. The molecular fraction of the total gas is high near the Galactic center and decreases with Galactocentric distance. The molecular fraction is also locally enhanced at the spiral arms compared with the inter-arm regions.

  7. Our Milky Way Gets a Makeover

    NASA Technical Reports Server (NTRS)

    2008-01-01

    [figure removed for brevity, see original site] [figure removed for brevity, see original site] Click on image for Fully Annotated Version Click on image for Poster Version

    Like early explorers mapping the continents of our globe, astronomers are busy charting the spiral structure of our galaxy, the Milky Way. Using infrared images from NASA's Spitzer Space Telescope, scientists have discovered that the Milky Way's elegant spiral structure is dominated by just two arms wrapping off the ends of a central bar of stars. Previously, our galaxy was thought to possess four major arms.

    This artist's concept illustrates the new view of the Milky Way, along with other findings presented at the 212th American Astronomical Society meeting in St. Louis, Mo. The galaxy's two major arms (Scutum-Centaurus and Perseus) can be seen attached to the ends of a thick central bar, while the two now-demoted minor arms (Norma and Sagittarius) are less distinct and located between the major arms. The major arms consist of the highest densities of both young and old stars; the minor arms are primarily filled with gas and pockets of star-forming activity.

    The artist's concept also includes a new spiral arm, called the 'Far-3 kiloparsec arm,' discovered via a radio-telescope survey of gas in the Milky Way. This arm is shorter than the two major arms and lies along the bar of the galaxy.

    Our sun lies near a small, partial arm called the Orion Arm, or Orion Spur, located between the Sagittarius and Perseus arms.

  8. CATALOG OF OBSERVED TANGENTS TO THE SPIRAL ARMS IN THE MILKY WAY GALAXY

    SciTech Connect

    Valle, Jacques P.

    2014-11-01

    From the Sun's location in the Galactic disk, one can use different arm tracers (CO, H I, thermal or ionized or relativistic electrons, masers, cold and hot dust, etc.) to locate a tangent to each spiral arm in the disk of the Milky Way. We present a master catalog of the astronomically observed tangents to the Galaxy's spiral arms, using different arm tracers from the literature. Some arm tracers can have slightly divergent results from several papers, so a mean value is takensee the Appendix for CO, H II, and masers. The catalog of means currently consists of 63 mean tracer entries, spread over many arms (Carina, Crux-Centaurus, Norma, Perseus origin, near 3 kpc, Scutum, Sagittarius), stemming from 107 original arm tracer entries. Additionally, we updated and revised a previous statistical analysis of the angular offset and linear separation from the mid-arm for each different mean arm tracer. Given enough arm tracers, and summing and averaging over all four spiral arms, one could determine if arm tracers have separate and parallel lanes in the Milky Way. This statistical analysis allows a cross-cut of a Galactic spiral arm to be made, confirming a recent discovery of a linear separation between arm tracers. Here, from the mid-arm's CO to the inner edge's hot dust, the arm halfwidth is about 340 pc; doubling would yield a full arm width of 680 pc. We briefly compare these observations with the predictions of many spiral arm theories, notably the density wave theory.

  9. MUSE sneaks a peek at extreme ram-pressure stripping events - II. The physical properties of the gas tail of ESO137-001

    NASA Astrophysics Data System (ADS)

    Fossati, Matteo; Fumagalli, Michele; Boselli, Alessandro; Gavazzi, Giuseppe; Sun, Ming; Wilman, David J.

    2016-01-01

    We present a study of the physical properties of the disc and tail of ESO137-001, a galaxy suffering from extreme ram-pressure stripping during its infall into the Norma cluster. With sensitive and spatially resolved MUSE (Multi Unit Spectroscopic Explorer) spectroscopy, we analyse the emission line diagnostics in the tail of ESO137-001, finding high values of [N II]/H? and [O I]/H? that are suggestive of the presence of shocks in turbulent gas. However, the observed line ratios are not as strong as commonly seen in pure shock heating models, suggesting that other emission mechanisms may contribute to the observed emission. Indeed, part of the observed emission, particularly at close separations from the galaxy disc, may originate from recombination of photoionized gas stripped from the main body of ESO137-001. We also identify a large number of bright compact knots within in the tail, with line ratios characteristic of H II regions. These H II regions, despite residing in a stripped gas tail, have quite typical line ratios, densities, temperatures, and metallicity (0.7 solar). The majority of these H II regions are embedded within diffuse gas from the tail, which is dynamically cool (? 25-50 km s- 1). This fact, together with a lack of appreciable gradients in age and metallicity, suggests that these H II regions formed in situ. While our analysis represents a first attempt to characterize the rich physics of the ESO137-001 tail, future work is needed to address the importance of other mechanisms, such as thermal conduction and magnetohydrodynamic waves, in powering the emission in the tail.

  10. Optimal Spectral Regions For Laser Excited Fluorescence Diagnostics For Point Of Care Application

    NASA Astrophysics Data System (ADS)

    Vaitkuviene, A.; G?gna, V.; Varanius, D.; Vaitkus, J.

    2011-09-01

    The tissue fluorescence gives the response of light emitting molecule signature, and characterizes the cell composition and peculiarities of metabolism. Both are useful for the biomedical diagnostics, as reported in previous our and others works. The present work demonstrates the results of application of laser excited autofluorescence for diagnostics of pathology in genital tissues, and the feasibility for the bedside at "point of careoff lab" application. A portable device using the USB spectrophotometer, micro laser (355 nm Nd:YAG, 0,5 ns pulse, repetition rate 10 kHz, output power 15 mW), three channel optical fiber and computer with diagnostic program was designed and ready for clinical trial to be used for cytology and biopsy specimen on site diagnostics, and for the endoscopy/puncture procedures. The biopsy and cytology samples, as well as intervertebral disc specimen were evaluated by pathology experts and the fluorescence spectra were investigated in the fresh and preserved specimens. The spectra were recorded in the spectral range 350-900 nm. At the initial stage the Gaussian components of spectra were found and the Mann-Whitney test was used for the groups' differentiation and the spectral regions for optimal diagnostics purpose were found. Then a formal dividing of spectra in the components or the definite width bands, where the main difference of the different group spectra was observed, was used to compare these groups. The ROC analysis based diagnostic algorithms were created for medical prognosis. The positive prognostic values and negative prediction values were determined for cervical Liquid PAP smear supernatant sediment diagnosis of being Cervicitis and Norma versus CIN2+. In a case of intervertebral disc the analysis allows to get the additional information about the disc degeneration status. All these results demonstrated an efficiency of the proposed procedure and the designed device could be tested at the point-of-care site or for intervertebral disc operations.

  11. Sun-Earth Day - Teaching Heliophysics Through Education Technology

    NASA Technical Reports Server (NTRS)

    Thieman, J.; Cline, T.; Lewis, E.

    2010-01-01

    Sun-Earth Day (SED) is an Education and Outreach program supported by the U.S, National Aeronautics and Space Administration (NASA). The intent of the program is to teach students and the general public about Heliophysics (the science of the study of the Sun, how it varies, and how solar dynamics affect the rest of the solar system, especially the Earth). The program was begun ten years ago. Each year since that time a particular day has been designated as "Sun-Earth Day ,,. Usually the day of the spring equinox (March 20 or 21) is Sun-Earth Day, but other days have been used as well. Each year a theme is chosen relating to Heliophysics and events reflecting that theme are planned not only for Sun-Earth Day, but for the entire year. From the very beginning educational technology was emphasized in the events in order to effectively reach wide audiences with the SED message. The main approach has been to have a "webcast" related to each year's theme, often from a location that supports the theme as well. For example, a webcast took place from the Mayan pyramids at Chichen Itza, Mexico to highlight the theme of "Ancient Observatories, Timeless Knowledge". Webcasts were not the only technology employed, however. Many of the themes centered on the dynamic nature of the Sun and the effects that solar storms can have on interplanetary space and in our day-to-day life on Earth. Activities for tracking when solar storms happen and how they affect the Earth were developed and brought together in an educational package called Space Weather Action Centers. This project is explained in more detail in another presentation in this session being given by Norma Teresinha Oliveira Reis. Recent Sun-Earth Days have utilized "social networking" technologies to reach widespread groups on the internet. Podcasts, Vodcasts, Facebook, Twitter, and Second Life are the types of network technologies being employed now. The NASA Distance learning Network is another method for bringing Sun-Earth Day events and training to widespread educators and classrooms in order to magnify the reach of Sun-Earth Day. Examples of the technologies will be shown along with an assessment of their effectiveness.

  12. VLT/UVES spectroscopy of Wray 977, the hypergiant companion to the X-ray pulsar GX301-2

    E-print Network

    L. Kaper; A. van der Meer; F. Najarro

    2006-07-27

    Model atmosphere fits to high-resolution optical spectra of Wray 977 confirm the B hypergiant classification of the massive companion to the X-ray pulsar GX301-2. The models give a radius of 62 Rsun, an effective temperature of 18,100 K and a luminosity of 5 x 10^^5 Lsun. The deduced mass-loss rate and terminal velocity of the stellar wind are 10^^-5 Msun/yr and 305 km/s, respectively. The interstellar Na I D absorption indicates that Wray 977 is located behind the first intersection with the Sagittarius-Carina spiral arm (1-2.5 kpc) and probably belongs to the stellar population of the Norma spiral arm at a distance of 3-4 kpc. The spectra obtained with UVES on the Very Large Telescope (VLT) cover a full orbit of the system, including periastron passage, from which we derive the radial-velocity curve of the B hypergiant. The measured radial-velocity amplitude is 10 +/-3 km/s yielding a mass ratio q = 0.046 +/- 0.014. The absence of an X-ray eclipse results in a lower limit to the mass of Wray 977 of 39 Msun. An upper limit of 53 Msun is derived for the mass of Wray 977 adopting a maximum neutron star mass of 2.5 Msun. The ``spectroscopic'' mass of Wray 977 is 43 +/- 10 Msun, consistent with the range in mass derived from the binarity constraints. The mass of the neutron star is 1.85 +/- 0.6 Msun. Time series of spectral lines formed in the dense stellar wind indicate the presence of a gas stream trailing the neutron star in its orbit. The long-term behaviour of the H alpha equivalent width exhibits strong variations in wind strength; the sampling of the data is insufficient to conclude whether a relation exists between wind mass-loss rate and pulsar spin period.

  13. The Three-mm Ultimate Mopra Milky Way Survey (ThrUMMS): A New View of the Molecular Milky Way

    NASA Astrophysics Data System (ADS)

    Barnes, Peter; Muller, Erik; Nguyen Luong, Quang; Nguyen, Hans

    2015-08-01

    We describe a new mm-wave molecular-line mapping survey of the southern Galactic Plane, and its first data releases and science results. The Three-mm Ultimate Mopra Milky Way Survey (ThrUMMS) maps a 602 sector of our Galaxys fourth quadrant, using a combination of fast mapping techniques with the Mopra radio telescope, simultaneously in the J=1?0 lines of 12CO, 13CO, C18O, and CN near 112 GHz at arcminute and 0.3 km s-1 resolution, with 1.2 K/chan sensitivity for 12CO and 0.6 K/chan for the other transitions. The calibrated data cubes from these observations are made available to the community after processing through our pipeline. Here, we describe the motivation for ThrUMMS, the development of new observing techniques for Mopra, and how these techniques were optimised to the objectives of the survey. We showcase some sample data products and describe the first science results, on global variations in the iso-CO line ratios and on a detailed multiwavelength study of the GMCs near l=333. The line ratios vary dramatically across the Galactic Plane, indicating a very wide range of optical depth and excitation conditions, from warm and translucent to cold and opaque. The population of cold clouds in particular have optical depths for 12CO easily exceeding 100 in some locations, and suggests that the fraction of the molecular mass in the Galactic disk that is in the coldest gas may be substantially underestimated. We compute robust column densities from the global data and derive a new conversion law from CO to molecular mass, indicating that global relationships in disk galaxies that depend on the CO?H2 mass conversion, such as star formation laws, may need to be recalibrated. Near l=333, we have compared ThrUMMS data to HI, cm-continuum, and several Herschel and Spitzer bands to derive the overall mass and star formation properties of two complexes along the line of sight, in the Scutum-Centaurus and Norma arms. The RCW106 complex in particular is currently undergoing a ministarburst event, potentially shedding light on starburst physics in distant galaxies.

  14. The neutron star in HESS J1731-347: Central compact objects as laboratories to study the equation of state of superdense matter

    NASA Astrophysics Data System (ADS)

    Klochkov, D.; Suleimanov, V.; Phlhofer, G.; Yakovlev, D. G.; Santangelo, A.; Werner, K.

    2015-01-01

    Context. Central compact objects (CCOs) in supernova remnants are isolated thermally emitting neutron stars (NSs). They are most probably characterized by a magnetic field strength that is roughly two orders of magnitude lower than that of most of the radio and accreting pulsars. The thermal emission of CCOs can be modeled to obtain constraints on the physical parameters of the star such as its mass, radius, effective temperature, and chemical composition. Aims: The CCO in HESS J1731-347 is one of the brightest objects in this class. Starting from 2007, it was observed several times with different X-ray satellites. Here we present our analysis of two new XMM-Newton observations of the source performed in 2013 which increase the total exposure time of the data available for spectral analysis by a factor of about five compared to the analyses presented before. Methods: We use our numerical spectral models for carbon and hydrogen atmospheres to fit the spectrum of the CCO. From our fits, we derive constraints on the physical parameters of the emitting star such as its mass, radius, distance, and effective temperature. We also use the new data to derive new upper limits on the source pulsations and to confirm the absence of a long-term flux and spectral variability. Results: The analysis shows that atmosphere models are clearly preferred by the fit over the blackbody spectral function. Under the assumption that the X-ray emission is uniformly produced by the entire star surface (supported by the lack of pulsations), hydrogen atmosphere models lead to uncomfortably large distances of the CCO, above 7-8 kpc. On the other hand, the carbon atmosphere model formally excludes distances above 5-6 kpc and is compatible with the source located in the Scutum-Crux (~3 kpc) or Norma-Cygnus (~4.5 kpc) Galactic spiral arm. We provide and discuss the corresponding confidence contours in the NS mass-radius plane. The measured effective temperature indicates that the NS is exceptionally hot for the estimated age of ~30 kyr. We discuss possible cooling scenarios to explain this property, as well as possible additional constraints on the star mass and radius from cooling theory.

  15. NuSTAR J163433-4738.7: A Fast X-Ray Transient in the Galactic Plane

    NASA Technical Reports Server (NTRS)

    Tomsick, John A.; Gotthelf, Eric V.; Rahoui, Farid; Assef, Roberto J.; Bauer, Franz E.; Bodaghee, Arash; Boggs, Steven E.; Christensen, Finn E.; Craig, William W.; Fornasini, Francesca M.; Grindlay, Jonathan; Hailey, Charles J.; Harrison, Fiona A.; Krivonos, Roman; Natalucci, Lorenzo; Stern, Daniel; Zhang, William W.

    2014-01-01

    During hard X-ray observations of the Norma spiral arm region by the Nuclear Spectroscopic Telescope Array (NuSTAR) in 2013 February, a new transient source, NuSTAR J163433-4738.7, was detected at a significance level of 8sigma in the 3-10 keV bandpass. The source is consistent with having a constant NuSTAR count rate over a period of 40 ks and is also detected simultaneously by Swift at lower significance. The source is not significantly detected by NuSTAR, Swift, or Chandra in the days before or weeks after the discovery of the transient, indicating that the strong X-ray activity lasted between approx. 0.5 and 1.5 days. Near-infrared imaging observations were carried out before and after the X-ray activity, but we are not able to identify the counterpart. The combined NuSTAR and Swift energy spectrum is consistent with a power law with a photon index of Gamma = 4.1(+1.5/-1.0) (90% confidence errors), a blackbody with kT = 1.2+/-0.3 keV, or a Bremsstrahlung model with kT = 3.0(+2.1/-1.2) keV. The reduced-?2 values for the three models are not significantly different, ranging from 1.23 to 1.44 for 8 degrees of freedom. The spectrum is strongly absorbed with NH = (2.8(+2.3/-1.4) 10(exp23) cm(exp-2), (9(+15 /-7) ) 10(exp22) cm(exp-2), and (1.7(+1.7/-0.9)) 10(exp23) cm(exp-2), for the power-law, blackbody, and Bremsstrahlung models, respectively. Although the high column density could be due to material local to the source, it is consistent with absorption from interstellar material along the line of sight at a distance of 11 kpc, which would indicate an X-ray luminosity greater than 10(exp34) erg s(exp-1). Although we do not reach a definitive determination of the nature of NuSTAR J163433-4738.7, we suggest that it may be an unusually bright active binary or a magnetar.

  16. NuSTAR J163433-4738.7: A fast X-ray transient in the galactic plane

    SciTech Connect

    Tomsick, John A.; Bodaghee, Arash; Boggs, Steven E.; Craig, William W.; Fornasini, Francesca M.; Krivonos, Roman; Gotthelf, Eric V.; Hailey, Charles J.; Rahoui, Farid; Assef, Roberto J.; Bauer, Franz E.; Christensen, Finn E.; Grindlay, Jonathan; Harrison, Fiona A.; Natalucci, Lorenzo; Stern, Daniel; Zhang, William W.

    2014-04-10

    During hard X-ray observations of the Norma spiral arm region by the Nuclear Spectroscopic Telescope Array (NuSTAR) in 2013 February, a new transient source, NuSTAR J163433-4738.7, was detected at a significance level of 8? in the 3-10 keV bandpass. The source is consistent with having a constant NuSTAR count rate over a period of 40 ks and is also detected simultaneously by Swift at lower significance. The source is not significantly detected by NuSTAR, Swift, or Chandra in the days before or weeks after the discovery of the transient, indicating that the strong X-ray activity lasted between ?0.5 and 1.5 days. Near-infrared imaging observations were carried out before and after the X-ray activity, but we are not able to identify the counterpart. The combined NuSTAR and Swift energy spectrum is consistent with a power law with a photon index of ?=4.1{sub ?1.0}{sup +1.5} (90% confidence errors), a blackbody with kT = 1.2 0.3 keV, or a Bremsstrahlung model with kT=3.0{sub ?1.2}{sup +2.1} keV. The reduced-?{sup 2} values for the three models are not significantly different, ranging from 1.23 to 1.44 for 8 degrees of freedom. The spectrum is strongly absorbed with N{sub H}=(2.8{sub ?1.4}{sup +2.3})10{sup 23} cm{sup 2}, (9{sub ?7}{sup +15})10{sup 22} cm{sup 2}, and (1.7{sub ?0.9}{sup +1.7})10{sup 23} cm{sup 2}, for the power-law, blackbody, and Bremsstrahlung models, respectively. Although the high column density could be due to material local to the source, it is consistent with absorption from interstellar material along the line of sight at a distance of 11 kpc, which would indicate an X-ray luminosity >10{sup 34} erg s{sup 1}. Although we do not reach a definitive determination of the nature of NuSTAR J163433-4738.7, we suggest that it may be an unusually bright active binary or a magnetar.

  17. A deep H? survey of the Milky Way. VI. The l = 332 area

    NASA Astrophysics Data System (ADS)

    Russeil, D.; Adami, C.; Amram, P.; Le Coarer, E.; Georgelin, Y. M.; Marcelin, M.; Parker, Q.

    2005-01-01

    The Galactic plane has been observed between l= 330 to l= 336 as part of a velocity resolved H? survey of the southern Milky Way using a scaning Fabry-Perot on a 36 cm telescope. The detailed analysis of the resultant H? profiles reveals the presence of several layers of ionized gas with different velocities over the surveyed region. We have studied in detail both the 2-D spatial and velocity structure of the HII regions RCW102, RCW104 and RCW106. Combining these H? observations with stellar and radio data we provide estimates for the most probable distances of these different layers. The first layer at -5 km s-1 is local emission linked to the Sco-Cen association at 170 pc. The next layer, around -24 km s-1, is at 1.9 kpc and traces the near section of the Sagittarius-Carina arm. Well connected to the Sagittarius-Carina arm portions traced in the adjacent regions (l= 328 and l= 338 area), the arm, in this longitude range, clearly shows and confirms the departure from a logarithmic spiral. The Scutum-Crux arm is also traced in this area by faint and diffuse emission at -40 km s-1 which can be placed at 3.2 kpc. The layer at -52 km s-1 is the major spiral-arm feature of the studied area; its most probable stellar distance is 4.2 kpc. An important emission component is also observed at -65 km s-1 in the southern part of the surveyed area. This mainly patchy and filamentary emission we identify as the possible optical counterpart of a supernovae remnant centered at l= 332.0, b=-3.2. Finally, two complexes have been determined around 12.5 kpc which places them in the far section of the Norma arm. Based on observations collected at the European Southern Observatory. Table \\ref{tab1} is only available in electronic form at http://www.edpsciences.org

  18. FOREWORD: V S Letokhov

    NASA Astrophysics Data System (ADS)

    Stroke, H. Henry; Linnartz, Harold

    2012-04-01

    Comments on Atomic, Molecular and Optical Physics (CAMOP) endeavors periodically to devote an issue to the life and accomplishments of physicists who have made significant contributions to the fields represented in this journal. Vladilen Letokhov is certainly one of them. For a number of years he was also a CAMOP Correspondent. We are grateful to Professor Victor Balykin for having organized this CAMOP special section. It is particularly significant to one of us (HHS) to remember a person who has made seminal advances in so many areas which to this day are at the forefront of studies by a number of physicists. But over the years this acquaintance developed into friendship and gave the wife of one of us, Norma, and HHS the opportunity to host Tina and Vladik in their home, and get to know both a bit better. There was also the seminal International School on Laser Applications in Physics in Vilnius organized by Letokhov, and then a visit to Troitsk and his group at the Institute of Spectroscopy (and even the organization of a couple of piano recitals by one of our daughters, Marija, who accompanied her parents in the then USSR). Our interests crossed in a couple of fields: laser interactions with atoms and sensitive spectroscopy of radioactive atoms. Letokhov was a participant in the early organization of laser spectroscopy at CERN and was instrumental in providing copper vapour lasers to the isotope separator facility, ISOLDE. To this day laser ion sources are under the aegis of Valentin Fedoseyev who came to CERN from Troitsk. The interaction of lasers with atoms, in particular the process of slowing atoms, is discussed by Balykin. It was Christmas time when a card arrived from Oleg Tumanov of the Institute of Spectroscopy: it included a graph of temperature achieved by laser cooling as a function of calendar date. The results of Letokhov's group were the earliest (see figure 1), even though lower temperatures achieved subsequently by others extended our knowledge. To many, the lack of formal recognition was a bit puzzling, and this will have to await the usual number of decades before relevant discussions become publicSee, for example, Friedman R M 2001 The Politics of Excellence (New York: Henry Holt).. But, as can be attested by the most prolific, diverse and creative contributions presented in the bibliography, Letokhov's work will leave a long-lasting legacy. Progress in laser cooling Figure 1. Progress in laser cooling.

  19. Tuning in on Cepheids: Radial velocity amplitude modulations. A source of systematic uncertainty for Baade-Wesselink distances

    NASA Astrophysics Data System (ADS)

    Anderson, Richard I.

    2014-06-01

    Context. Classical Cepheids are crucial calibrators of the extragalactic distance scale. The Baade-Wesselink technique can be used to calibrate Cepheid distances using Cepheids in the Galaxy and the Magellanic Clouds. Aims: I report the discovery of modulations in radial velocity (RV) curves of four Galactic classical Cepheids and investigate their impact as a systematic uncertainty for Baade-Wesselink distances. Methods: Highly precise Doppler measurements were obtained using the Coralie high-resolution spectrograph since 2011. Particular care was taken to sample all phase points in order to very accurately trace the RV curve during multiple epochs and to search for differences in linear radius variations derived from observations obtained at different epochs. Different timescales are sampled, ranging from cycle-to-cycle to months and years. Results: The unprecedented combination of excellent phase coverage obtained during multiple epochs and high precision enabled the discovery of significant modulation in the RV curves of the short-period s-Cepheids QZ Normae and V335 Puppis, as well as the long-period fundamental mode Cepheids ? Carinae and RS Puppis. The modulations manifest as shape and amplitude variations that vary smoothly on timescales of years for short-period Cepheids and from one pulsation cycle to the next in the long-period Cepheids. The order of magnitude of the effect ranges from several hundred m s-1 to a few km s-1. The resulting difference among linear radius variations derived using data from different epochs can lead to systematic errors of up to 15% for Baade-Wesselink-type distances, if the employed angular and linear radius variations are not determined contemporaneously. Conclusions: The different natures of the Cepheids exhibiting modulation in their RV curves suggests that this phenomenon is common. The observational baseline is not yet sufficient to conclude whether these modulations are periodic. To ensure the accuracy of Baade-Wesselink distances, angular and linear radius variations should always be determined contemporaneously. Based on observations collected at ESO La Silla Observatory using the Coralie spectrograph mounted to the Swiss 1.2 m Euler telescope.The derived radial velocities are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/566/L10Appendix A is available in electronic form at http://www.aanda.org

  20. Thermalization of Interstellar CO

    NASA Astrophysics Data System (ADS)

    Oka, Takeshi; Xiao, Han; Lynch, Phillip

    2009-06-01

    Unlike radio emission of CO, infrared absorption of CO give column densities in each rotational level directly when weak transitions like overtone bands or ^{13}CO or C^{18}O isotope bands are used. This allows more straightforward determination of temperature (T) and density (n) of the environment than the large velocity gradient (LVG) model used to determine them from antenna temperatures of radio emission. In order to facilitate such determination, we have solved the steady state linear simultaneous equations for thermalization of CO and calculated population ratios of rotational levels as a function of T and n as we did for H_3^+. We thus get two-dimensional graph of column density ratios, for example, N(J=1)/N(J=0) and N(J=2)/N(J=0) as a function of T and n or variation of it when other population ratios are used. As for H_3^+ we can invert the graph to obtain graphs of T versus n as functions of population ratios which is more convenient to apply to observed data. We use rate constants of collision-induced transitions between CO and ortho- and para-H_2 theoretically calculated by Fowler and Wernli et al. which have been compiled and extended by Schier et al. As the first approximation, only spontaneous emissions are considered and other radiative effects such as induced emission and absorption are ignored. The results are applied to CO column densities observed toward the Galactic center, that is, CO in the three spiral arms, 3-kpc (Norma), 4.5-kpc (Scutum), and local arms (Sagittarius), and in the Central Molecular Zone. T. Oka and E. Epp, ApJ, 613, 349 (2004) M. Goto, Usuda, Nagata, Geballe, McCall, Indriolo, Suto, Henning, Morong, and Oka, ApJ, 688, 306 (2008) D. R. Fowler, J. Phys. B: At. Mol. Opt. Phys. 34, 2731 (2001) M. Wernli, P. Valiron, A. Faure, L. Wiesenfeld, P. Jankowski, and K. Szalewicz, A & A, 446, 367 (2006) F. L. Schier, F. F. S. van der Tak, E. F. van Dishoeck, and J. H. Black, A & A, 432, 369 (2005)

  1. NuSTAR Galactic Plane Survey and Galactic Binaries Program

    NASA Astrophysics Data System (ADS)

    Hailey, Charles J.; NuSTAR Science Team

    2013-01-01

    The NuSTAR Galactic science program includes a Galactic plane survey and observations of specific Galactic binaries. The survey includes a 2x0.8 degree field near Sgr A*, in which Chandra uncovered a large population of unidentified sources, possibly CVs. NuSTAR should detect hundreds of these sources in the hard X-ray band, helping identify their nature. A similar survey of the Norma region will be done for comparative studies. NuSTAR will observe Sgr A*, in coordination with Chandra and other observatories, to search for hard X-ray flaring. The same observations will provide an image of the central few tens of parsecs of the Galaxy with more than an order of magnitude better sensitivity than INTEGRAL. NuSTAR will spatially resolve the hard X-ray emission in the molecular cloud Sgr B2 to better understand its origin. An observation of the Limiting Window, which holds a possible new class of CVs, will yield information on their nature through the fraction of hard X-ray emitters. NuSTARs planned observation of the G2 molecular cloud - Sgr A* infall in the spring of 2013 will be discussed. Finally, with its superb hard X-ray sensitivity, NuSTAR will detect and map the low energy extension of the diffuse gamma-ray background observed by INTEGRAL, helping to resolve the long-standing mystery of the diffuse Galactic X-ray background. For Galactic binaries, NuSTAR's hard X-ray sensitivity will permit detailed studies of the fainter part of this population. NuSTAR will obtain the first hard X-ray measurements of black hole and neutron star transients in and approaching quiescence, providing new insights into how the X-ray emission is produced. NuSTAR will follow up on recently discovered types of High-Mass X-ray Binaries to search for pulsations, cyclotron lines, or spectral breaks, constraining the properties of their compact objects. We also plan to target gamma-ray binaries to understand whether the emission is powered by accretion or neutron star rotation. For bright X-ray binaries, we will use NuSTARs superb energy resolution at >10 keV to study cyclotron lines from accreting pulsars and to search for absorption edges in type I X-ray bursts that, if found, provide a new window on neutron star physics.

  2. PREFACE: The XI Mexican School on Particles and Fields

    NASA Astrophysics Data System (ADS)

    2005-01-01

    The XI Mexican School on Particles and Fields took place on 2-13 August 2004, in the city of Xalapa, Veracruz, Mxico. The School continued with the tradition of promoting High Energy Physics among the younger generation in Mexico. Thus, it was aimed specifically at graduate students and postdocs. The School consisted of several courses delivered by international experts on subjects of current interest to the scientific community. The length of each course was of six to eight hours, English being the language of instruction. A novelty in this edition of the School was its total duration (two weeks as opposed to one), the number of hours assigned to one subject, and the addition of some experimental courses for the students to overcome their inhibitions of a direct encounter with the equipment and its usage. There were also a few overview talks delivered by local experts on the current status of some of the research fields actively pursued in Mexico. The XI-MSPF was organized by the Particles and Fields Division of the Mexican Physical Society. It was generously sponsored by several institutions: Universidad de Veracruz, Universidad Nacional Autnoma de Mxico, Universidad Michoacana de San Nicols de Hidalgo, Centro de Investigaciones y Estudios Avanzados del IPN (CINVESTAV) and Consejo Nacional de Ciencia y Tecnologa (CONACyT). We are very grateful to Dr Ral Arias Lovillo, Dr Vctor Manuel Alcarz Romero, Dr Asdrbal Flres Lpez and Mtro Walter Saiz Gonzlez, head of the Academic Secretariat, Director and Subdirector of the Office of Scientific Research and Director of the Division of Exact Sciences of the University of Veracruz, respectively, for their invaluable support in all senses to our Summer School. We also appreciate the important and useful assistance provided by Dr Rubn Bernardo Morante Lpez, Director of the Museum of Anthropology of Xalapa, and Dr Hctor Coronel Brizio of the Secretariat of Education and Culture of the state of Veracruz. We acknowledge the help of our colleagues in the Organizing Committee: Norma Bagatella Flores (FFIA-U. Veracruzana), Heriberto Castilla Valds (CINVESTAV-U. Zacatenco), Lorenzo Dz Cruz (FCFM-BUAP), Juan Jos Godina Nava (CINVESTAV-U. Zacatenco), Gerardo Herrera Corral (CINVESTAV-U. Zacatenco), German Mandujano Vallejo (FFIA-U. Veracruzana), Miguel ngel Prez Angn (CINVESTAV-U. Zacatenco), Efran Rojas Marcial (FFIA-U. Veracruzana) and Carlos Vargas Madrazo (FFIA-U Veracruzana). Many thanks also to our Conference Secretaries Patricia Carranza and Soledad Lpez for the efficiency with which they carried out their job and their dedication. Special thanks go to Mara Guadalupe Colorado Hernndez and Javier Ignacio Fragoso Tizapan, whose help in carrying out the School was essential, without their collaboration this School would not have been the same. We take this opportunity to thank most warmly all the speakers for delivering excellent lectures which made this event a success. Moreover, to our utmost delight, the students participated very enthusiastically and we hope that this school will contribute considerably towards their academic development. The future of scientific endeavour always depends upon the students. Adnan Bashir (IFM-UMSNH) Jens Erler (IF-UNAM) Rul Hernndez (FFIA-UV) Myriam Mondragn (IF-UNAM) Luis Villaseor (IFM-UMSNH)

  3. PREFACE: 4th National Meeting in Chaos, Complex System and Time Series

    NASA Astrophysics Data System (ADS)

    Ral Hernndez Montoya, Alejandro; Hernndez Lemus, Enrique; Rubn Luvano Enrquez, Jos; Rodrguez Achach, Manuel Enrique; Vargas Madrazo, Carlos Ernesto

    2013-12-01

    The fourth edition of the National Meeting on Chaos, Complex Systems and Time Series (NMCCSTS4), or in Spanish 4a. Reunin Nacional de Caos, Sistemas Complejos y Series de Tiempo, was held from 29 November to 2 December 2011 in the University of Veracruz (Universidad Veracruzana), Campus Xalapa, at Xalapa Veracruz, Mxico, in the beautiful House of the Lake (Casa del Lago), a late XIX century former textile factory situated in the edge of an also ancient former dam, currently a park containing three small lakes, very emblematic of Xalapa, City, the capital of the state of Veracruz, Mxico. The previous editions of this meeting, were held in Mrida (2006), Pachuca (2008) and Puebla (2009). A clear uptrend is observed in the number of participants in this academic event from all Universities of Mxico and abroad, going from about 15 participants in the first meeting to more than 90 in the last one. On this occasion, about 90 participants from three countries attended our event, where 29 papers (10 master lectures from top recognized national and international leaders in the fields of complexity, and 19 invited papers), one course for students and 42 posters were presented. A look at the scientific program of the NMCCSTS4, allows us to appreciate the wide range of topics and recent advances that were covered during our event; topics and recent results in the areas of biology, econophysics, sociophysics, genomics and bioinformatics, complex networks, thermodynamics, etc, were presented and discussed rigorously in a friendly, dynamical and informal atmosphere. Also, on this occasion, we celebrated Professor Miguel Angel Jimnez Montao, for his very distinguished academic career throughout more that 50 years and as a founding member of the Faculty of Physics and AI of University of Veracruz. Prizes were awarded for the best poster presentations. The winner was Porfirio Toledo, from Faculty of Mathematics, University of Veracruz (Game theory to characterize solutions of a discrete-time Hamilton--Jacobi equation). The present volume contains a rigorous selection of the lectures presented at the NMCCSTS4. All papers were peer reviewed and we consider the high quality and the wide range of topics covered here displays the high level that the community of complexity sciences is reaching in our country. We would like to thank all of the speakers, participants and the members of the Organizing Committee, also we would like to express our gratitude to all students and support personal involved with the logistic and technical aspects of the organization of our event. This IV edition of the National Meeting on Caos, Complex System and Time Series was sponsored by the following organizations and institutions, we warmly thank all of them: Universidad Veracruzana, IF-BUAP, UAM Azcapotzalco, INMEGEN, Conacyt (155492), all them from Mxico and the Ministero degli Affari Esteri (MAE) from Italy. A R Hernndez Montoya University of Veracruz M E Rodrguez Achach University of Veracruz E Hernndez Lemus National Institute of Genomic Medicine J R Luvano Enrquez Universidad Autnoma Metropolitana-Azcapotzalco C E Vargas Madrazo University of Veracruz Organizing Committee Jos Luis Carrillo Estrada Instituto de Fsica, Benemerita Universidad Autnoma de Puebla, carrillo@sirio.ifuap.buap.mx Jos Rubn Luvano Enrquez Universidad Autnoma Metropolitana-Azcapotzalco, jrle@correo.azc.uam.mx Enrique Hernndez Lemus National Institute of Genomic Medicine, ehernandez@inmegen.gob.mx Alejandro Ral Hernndez Montoya University of Veracruz, alhernandez@uv.mx Norma Bagatella Flores University of Veracruz, nbagatella@uv.mx Adrian Arturo Huerta Hernndez University of Veracruz, adhuerta@uv.mx Manuel Enrique Rodrguez Achach University of Veracruz, manurodriguez@uv.mx Carlos Ernesto Vargas Madrazo University of Veracruz, cavargas@uv.mx Sol Haret Baez Barrios University of Veracruz, arbaez@uv.mx Hctor Francisco Coronel Brizio University of Veracruz, hcoronel@uv.mx Sergio Adrian Lerma Hernndez University of Veracruz, slerma@uv.mx

  4. Effects of drug-carrier interactions on drug dissolution from binary and ternary matrices

    NASA Astrophysics Data System (ADS)

    Iqbal, Zafar

    For nearly five decades, pharmaceutical researchers have studied solid solutions of drugs in polymers as a potential means to enhance the dissolution of drugs with poor aqueous solubility. This has become of greater importance in recent years because most new potential drug compounds (new chemical entities) exhibit poor water solubility and present great challenges to scientists who must design dosage forms from which the drugs are bioavailable. During the formulation of a solid solution, the drug undergoes physical but not chemical alterations that increase its chemical potential in the formulation relative to that of the pure drug in its stable form. This increased chemical potential is responsible for enhanced dissolution as well as physical instabilities, such as amorphous to crystalline conversions and precipitation within the solid state. The chemical potential is derived from the Gibbs free energy, so it is reasonable to explain the behavior of solid solution systems in terms of thermodynamics. Solid solutions and dispersions have been extensively studied by pharmaceutical scientists, both with regard to manufacturing aspects and the proposal of various models in attempts to explain the physical bases for how these systems work. Recently, Dave and Bellantone proposed a model based on the thermodynamic changes resulting from the formulation of binary solid solutions of a drug in the polymer PVP. Their model introduced a modification of the F-H theory, which was used to quantify the drug-polymer interaction energies and calculate the entropy of mixing of the drug and polymer. In this work, the model of Dave and Bellantone was extended to include three-component systems, consisting of one drug mixed in a carrier matrix consisting of mixture of two polymers or a polymer and a surfactant. For this research, solid solutions were formed using various drug weight fractions in the formulations. The study focused on the following points: (1) Prepare solid solution formulations and perform appropriate physical characterizations. (2) Characterize the increase in drug dissolution rates resulting from solid solution formulations. (3) Relate the initial dissolution rates to the drug solubility. (4) Explain the solubility enhancement from solid solution dosage in terms of the drug polymer interactions using the extended thermodynamic model. Two poorly water soluble drugs, levonorgestrel (LEVO) and ethinyl estradiol (EE) were formulated in seven solid solution preparations comprised of four carrier systems. Materials used as carriers included various combinations of the polymers PVP K-30, Copovidone (COP), Poloxamer 182, and the surfactant TweenRTM 20. Additionally, ibuprofen (IBU) was used in three formulations consisting of various combinations of PVP K-30, Copovidone and TweenRTM 20. Formulations with various drug weight fractions (0.5%--30%) were prepared using the solvent evaporation technique. Each formulation was tested for dissolution using intrinsic dissolution apparatus (USP). The solid solutions were compressed into tablets into the sample die that maintained a constant surface area during the dissolution process. DSC, XRD and NIRS scans identified that the crystalline peaks of the drug disappeared with the addition of the polymer for all ratios of EE, indicating the formation of solid solutions (to within the limits of detection of the equipment). This was also observed for the LEVO dispersions up to 10% drug loading. At higher drug loading, solutions were formed but some small degree crystallinity was also present. For each experiment, the initial dissolution rates were obtained from the slope of the mass dissolved vs. time plots taken at early times, and volume normalized initial dissolution rates RV were calculated by dividing the initial dissolution rate by the volume fraction of the drug in the formulation. Comparison of the RV values for the various formulations with a reference RV (typically that of the pure drug or of the formulation with the highest polymer content) allowed calculation of relative volume norma

  5. Gas kinematics and ionization along the extended sight line to HD 116852

    NASA Technical Reports Server (NTRS)

    Sembach, Kenneth R.; Savage, Blair D.

    1994-01-01

    We present Goddard High-Resolution Spectrograph intermediate observations of the interstellar medium toward HD 116852, a low halo star at a distance of 4.8 kpc (z = -1.3 kpc) in the direction l = 304. deg 9, b = 16.deg 1. The small science aperture observations have signal-to-noise ratios ranging from 30 to 90 and resolutions of 11 to 18 km/s (FWHM). We confirm the optical MK classification of this star through an analysis of its ultraviolet photosperic and stellar wind profiles. We detect interstellar lines of Al III, Si IV, C IV, and N V together with lines of C I, C I*, C I**, Si II, Ge II, P II, and Ni II. We convert the Mg II, P II, S II, Al III, Si IV, C IV, and N V profiles into measure of apparent column density as a function of LSR velocity. Gas scale height, velocity dispersion, and differential Galactic rotation effects govern the profile shapes. A simple computer model of the expected sight line column density profiles for the low and high ion species indicates that the gas velocity dispersions and scale heights increase as the ionization level of the gas increases. We find scale heigts H greater than or = 1 kpc for the high ions, which are comparable to the z-distance of the star, whereas we find H approximatley = 0.6 to 0.7 kpc for A1 III and H approximatley 0.1 kpc for P II and Ge II. An enhancement in the Al II profile near -15 km/s accounts for approximately 25% of the A1 III column along the sight line and probably arises within gas located approximately 500 pc below the Sagittarius-Carina spiral arm link. Portions of the broad underlying A1 III distribution are associated with the higher ionization lines, perhaps in conductive interfaces. The presence of N V and the column density ratios of Si IV, C IV, and N V favor the interpretation that much of the high ion absorption is produced by collisional ionization in gas with T = 1-3 x 10(exp 5) K. An enhancement near -35 km/s in both the Si IV and C IV profiles may be due to an outflow from the Norma spiral arm at a z-distance of about -1 kpc. The smooth decrease of the N(C IV)/N(Si IV) ratio at negative velocities may be due to an ISM ionization structure for hot gas that changes distance from the Galactic plane or to a two phase gas distribution in which the relative contribution from each phase changes with distance from the Galactic plane.

  6. Waterproof Anti-Explosive Powders for Coal Mines

    NASA Astrophysics Data System (ADS)

    Buczek, Bronis?aw; Vogt, El?bieta

    2014-03-01

    Limestone powder characterized by hydrophobic properties is used as an anti-explosive agent in coal mining industry. Unfortunately, the standard method of producing such powder by milling limestone with stearic acid is practically unprofitable in many modernized quarries and plants, and sometimes literally impossible due to the introduction of technological changes and implementation of modern mills. Then new methods of hydrophobization of limestone surfaces ought be searched. In the work two methods hydrophobization: from the stearic acid vapour phase and from silicone solutions are proposed. Lime dust from the Czatkowice Quarry of Lime was used as a raw material during investigations. It is a good agent for research because it is possible to compare the properties of samples modified in this work to the properties of anti-explosive lime powder (Polish Standard, 1994) used in mining industry in Poland. The first technique of limestone powder hydrophobization was carried out in an apparatus of own design (Vogt, 2008, 2011), and it consisted in free sedimentation of the powder layer dispersed by stearic acid vapour in powder counter current flow. The second way of modification consisted in mixing in the evaporating dish substrates: limestone powder and dope - silicone solution - Sarsil H-15 (Vogt & Opali?ski, 2009; Vogt & Ho?ownia, 2010). Evaluation of properties so-obtained waterproof powders was carried out according to the Polish Standard, as well as using original powder determination ways, with the Powder Characteristic Tester (Index tables, Tablets & Capsules, 2005). Moreover water vapour adsorption isotherms were obtained and the thermal decomposition of powder was made. All modified samples acquired the hydrophobic character. Therefore we can state that the both proposed methods of hydrophobization of the limestone powder are useful. The parameters obtained with the use of Powder Characteristics Tester enable us to make a characterization of limestone properties not only as a water resistant material but also from the cohesion point of view. On the base of TG, DTG or DTA and EGA curves for all investigated materials was stated that the character of the thermal decomposition of modified samples is the same as this one for raw powder, what is profitable for application of hydrophobized powders as an anti-explosive agent. W grnictwie w?gla kamiennego u?ywany jest hydrofobowy py? wapienny jako substancja stosowana w systemie zabezpiecze? przeciwwybuchowych (Cybulski, 2004). Niestety, dotychczasowy sposb wy- twarzania takiego produktu polegaj?cy na wsp?mieleniu kamienia wapiennego z kwasem stearynowym staje si? praktycznie niemo?liwy do stosowania w nowoczesnych zak?adach np. kamienio?omy. Sytuacja taka jest wynikiem wprowadzania zmian technologicznych, g?wnie zwi?zanych z wymian? starych konstrukcji m?ynw na nowe urz?dzenia. Tym samym istnieje potrzeba poszukiwania nowych metod hydrofobizacji powierzchni py?w wapiennych. W pracy omwiono dwie nowe metody hydrofobizacji py?u wapiennego: za pomoc? par kwasu stearynowego oraz roztworu silikonowego - Sarsil H-15. Podczas bada? u?ywano surowego py?u wapiennego pochodz?cego z Kopalni Kamienia Wapiennego w Czatkowicach. Materia? ten jest dobrym materia?em do bada? gdy? istnieje mo?liwo?? porwnywania w?a?ciwo?ci materia?w hydrofobowych otrzymanych w pracy z w?a?ciwo?ciami handlowego py?u przeciwwybuchowego (Polska Norma, 1994), u?ywanego w polskich kopalniach. Pierwszy sposb hydrofobizacji py?u wapiennego, polegaj?cy na swobodnym opadaniu py?u wapiennego w oparach kwasu stearynowego przep?ywaj?cych w przeciwpr?dzie, przeprowadzono w aparacie w?asnej konstrukcji (Vogt, 2008, 2011). Aparat gwarantuje dobry kontakt modyfikatora z ziarnami py?u. Py? opadaj?c, nie napotyka ?adnych przeszkd ulega? rozproszeniu, a wprowadzony w stanie parowym kwas stearynowy mo?e swobodnie osiada? na jego powierzchni zewn?trznej oraz penetrowa? w g??b porw, blokuj?c je dla wilgoci. Drugi sposb hydrofo

  7. Hydrochemistry of waters from five cenotes and evaluation of their suitability for drinking-water supplies, northeastern Yucatan, Mexico

    NASA Astrophysics Data System (ADS)

    Alcocer, Javier; Lugo, Alfonso; Marn, Luis E.; Escobar, Elva

    Waters from five cenotes that are currently being used for aquatic recreational activities and that lie along the Cancun-Tulum touristic corridor, Mexico, were evaluated hydrochemically to determine whether the cenotes may be considered as potential drinking-water sources. Several parameters exceed the Mexican Drinking Water Standards (MDWS), but since they do not pose a significant health threat, four of the five cenotes may be used as drinking-water sources. The common contaminants in the Yucatan Peninsula, fecal coliforms and nitrate, are in most cases below the MDWS (0-460 MPN/100ml and 0.31-1.18mg/L, respectively). Although these four cenotes meet the MDWS, a careful groundwater management policy needs to be developed to avoid contamination (fecal and nitrates) and salt-water intrusion. Rsum Les eaux de cinq cnots, qui sont normalement utilises pour des activits de plein air, dans la rgion touristique de Cancun-Tulum (Mexique), ont t soumises analyses chimiques pour savoir si les cnots peuvent tre considrs comme des sources d'eau potable. Plusieurs paramtres dpassent les normes mexicaines en matire d'eau potable; mais comme ceux-ci ne posent pas de problme rel de sant, quatre des cinq cnots peuvent tre capts pour l'eau potable. Les contaminants habituels dans les eaux de la presqu'le du Yucatan, coliformes fcaux et concentrations leves en nitrate, sont la plupart du temps au-dessous des normes (respectivement 0 460 germes/100ml et 0,31 1,18mg/l). Bien que ces quatre cnots satisfassent aux normes, il est ncessaire de mettre en place des rgles prcises de l'utilisation de l'eau souterraine, afin d'viter la contamination par les germes fcaux et par les nitrates, ainsi que l'intrusion marine. Resumen Se analiz hidroqumica y bacteriolgicamente el agua de algunos cenotes localizados a lo largo del corredor turstico Cancun-Tulum, que actualmente se utilizan para diversas actividades recreativas, para determinar su potencial de uso como fuente de abastecimiento de agua potable. La mayor parte de los parmetros excedieron los criterios establecidos en la Norma Mexicana para Agua Potable (NMAP), sin embargo, como stas no representan una riesgo para la salud, el agua de cuatro de los cinco cenotes puede ser emplada como fuente de abastecimiento de agua potable. Los contaminantes comnes del agua subterrnea de la pennsula de Yucatn, coliformes fecales y nitratos, se encuentran en la mayora de los casos por debajo de la NMAP (0-460 NMP/ 100ml y 0.31-1.18mg/l, respectivamente). A pesar de que estos cuatro cenotes cumplen con la NMAP, es necesario desarrollar una poltica de manejo adecuada del agua subterrnea para evitar la contaminacin de este recurso (fecal y por nitratos), as como la intrusin de agua salina.

  8. Project Seacleaner: from cooperation among ISMAR-CNR researchers, high school students and the Ligurian Cluster for Marine Technologies to an application for environmental monitoring and scientific research.

    NASA Astrophysics Data System (ADS)

    Merlino, Silvia; Marini, Claudio; Tosi, Daniela; Caselli, Lorena; Marini, Davide; Lucchinelli, Paolo; Vatteroni, Davide; Lunardelli, Francesco; Agrusa, Astrid; Lombardi, Davide; Stroobant, Mascha

    2014-05-01

    Recently, the Institute for Marine Science of the Italian Research Council ISMAR-CNR has undertaken a series of actions to incorporate oceanography in education: among these, the project "SeaCleaner" that has been developed together with a local Secondary School (Istituto di Istruzione Superiore Capellini-Sauro) and the Ligurian Cluster for Marine Technologies (DLTM) [1]. Seven students, engaged within the national Programme "work-related learning"[2], have worked side-by-side with ISMAR-CNR researchers, investigating on the problem of debris accumulation on beaches, and understanding the damage that this issue causes to marine environments and ecosystems. This problem has recently become a challenging research subject for an increasing number of oceanographers and, in general, for environmental researchers coming from the Mediterranean areas [3, 4, 5], other European Seas [6] and Oceans [7, 8]. Data collected during repeated surveys (seasonally) in the same beach stretch, over several years, allow calculating debris accumulation rates and flow intensities. Application of current models gives additional information on debris dispersal and origin, but we shouldn't forget that, generally, relevance of acquired data is determined by the accuracy and standardization of the procedure. In this context, students have previously searched for literature sources and summarized the most important issues, among these: few data that are often collected during small ranges of time and usually a low number of available researchers for carrying out such a time-consuming survey in the field. In a initial part of the project, several trial surveys have been performed on different beaches in La Spezia province, in order to understand how to elaborate possible strategies to speed up and standardize the procedure. Developing an application for Android system (downloadable on any compatible mobile device such as smartphones, tablets, etc.) has been considered as a good solution since it is easy to spread and distribute among non-technical end-users. This app will help final users to carry out a standard monitoring procedure, in a quick way. All data (photographs, site characteristics, kind of debris, waypoints) will be properly captured and semi-automatically registered on a separate electronic spreadsheet. SeaCleaner app can be provided to environmental associations, marine parks, volunteers and its easy approach will allow us to obtain standardized and safe data, upcoming from an increasing number of points, which will be acquired in situ and then saved on a dedicated remote database. Citizen participation in scientific programs, already experienced in the field of astronomy [9] has been effective also in other scientific fields, both from the scientific and social point of view, since it brings people closer to science and fills the gap between who produces science and technology and who benefits from it ("citizen science") [10, 11]. SeaCleaner is ready to be used during the school year 2013/2014 to test its validity and usefulness. Further internships and collaborations between ISMAR and educational institutions, will allow us by the end of April 2014 to show the first dataset processed in this experimental phase. It is worth to highlight the active involvement of young people in this project and its effectiveness as a tool for raising awareness on environmental issues and orientating young people towards scientific careers. The project has been awarded in November 2013 as the best regional work-related learning project. [1] DLTM: Distretto Ligure per le tecnologie Marine: www.dltm.it. [2] Italian Law on general rules for work-related learning: D.Lgs 15/04/2005 n. 77 sulla "Definizione delle norme generali relative all'alternanza scuola-lavoro, a norma dell'articolo 4 della legge 28 marzo 2003, n. 53". [3] UNEP/MAP/MED POL (2004). Guidelines on Management of coastal litter for the Mediterranean region (MED POL). MAP Technical Reports Series No.148. UNEP/MAP, Athens. [4 ] Henry, M. (2010). Pollution

  9. Study of Galactic clumps with millimeter / submillimeter continuum and molecular emission: Early stages of massive star formation

    NASA Astrophysics Data System (ADS)

    Merello, Manuel Antonio

    2014-09-01

    Massive stars play a key role in the evolution of the Galaxy; hence they are important objects of study in astrophysics. Although they are rare compared to low mass stars, they are the principal source of heavy elements and UV radiation, affecting the process of formation of stars and planets, and the physical, chemical, and morphological structure of galaxies. Star clusters form in dense "clumps" (few parsecs in size) within giant molecular clouds, while individual stars form in cores (subparsec scale). An important step in the observational study of massive star formation is the identification and characterization of clumps. More detailed studies can then show how these clumps fragment into cores. Studies of clumps in our Galaxy will provide fundamental guidelines for the analysis of other galaxies, where individual clumps and cores cannot be resolved, and provide a catalog of interesting sources for observations of the Milky Way with a new generation of instruments, such as the Atacama Large Millimeter/Submillimeter Array. Large-scale blind surveys of the Galactic plane at millimeter and submillimeter wavelengths have recently been completed, allowing us to identify star forming clumps and improve our understanding of the early stages of massive stars. One of these studies, the Bolocam Galactic Plane Survey (BGPS), mapped the continuum emission at 1.1 mm over a large region of the northern Galactic plane at a resolution of 33", identifying 8559 compact sources throughout the Galaxy. In this dissertation, I present observations of a sample of sources from the BGPS catalog, obtained with the Submillimeter High Angular Resolution Camera II (SHARC-II). I present in this work 107 continuum emission maps at 350 μm at high angular resolution (8.500) toward clump-like sources and construct a catalog of BGPS substructures. I estimate clump properties such as temperatures and multiplicity of substructures, and compare my results with 350 ?m continuum maps from the Hi-GAL survey. I also present a detailed analysis, using molecular line and dust continuum observations, of the region G331.5-0.1, one of the most luminous regions of massive star formation in the Milky Way, located at the tangent region of the Norma spiral arm. Molecular line and millimeter continuum emission maps reveal the presence of six compact and luminous molecular clumps, with physical properties consistent with values found toward other massive star forming sources. This work includes the discovery of one of the most energetic and luminous molecular outflows known in the Galaxy, G331.512-0.103. For this high-speed outflow, I present ALMA observations that reveal a very compact, extremely young bipolar outflow and a more symmetric outflowing shocked shell surrounding a very small region of ionized gas. The source is one of the youngest examples of massive molecular outflows associated with the formation of a high-mass star.

  10. Recommendations for the establishment of the seismic code of Haiti

    NASA Astrophysics Data System (ADS)

    Pierristal, G.; Benito, B.; Cervera, J.; Belizaire, D.

    2013-05-01

    Haiti, because of his seismicity associated with plate boundary and several faults that cross the island of Hispaniola (Haiti-Dominican Republic), has been affected in the past by major earthquakes, which have caused loss of life and damage or considerable structural collapses (ex. 1771, 1842), sometimes the destruction of the cities. The recent earthquake of January 12, 2010, was the most destructive earthquake that any country has experienced in modern times, when we measure the number of people killed with respect to the population of a country (Cavallo et al. 2010). It's obvious that the major causes of theses losses are the lack of awareness of the population about the earthquakes, the absence of seismic code and quality control of the building. In this paper, we propose some recommendations for the establishment of the seismic code of Haiti in order to decrease physical and social impacts of earthquakes in the future. First of all, we present a theoretical part of concepts and fundamental elements to establish a seismic code, such as: description of the methodology for seismic hazard's assessment, presentation of the results in terms of acceleration maps for the whole country (in rock sites) and Uniform Hazard Spectrum (UHS) in the cities, and the criteria for soil classification and amplification factors for including site's effects, equivalent forces, etc. Then, we include a practical part where calculations and comparisons of five seismic codes of different countries (Eurocode 8, Spain, Canada, United States and Dominican Republic) are included, in order to have criteria for making the proposals for Haiti. Using the results of Benito et al (presented in this session S10) we compare the UHS in different cities of Haiti with the response spectrum derived from the application of the spectral shapes given by the aforementioned codes. Furthermore, the classification of soils and buildings have been also analyzed and contrasted with local data in order to propose the more suitable classification for Haiti. Finally, we have proposed a methodology for the forces estimation providing the values of the relevant coefficients. References: EN 1998-1:2004 (E): Eurocode 8, Design of structures for earthquake resistance, Part 1(General Rules, seismic actions and rules for buildings), 2004. -MTPTC, (2011). Rgles de calcul intrimaires pour les btiments en Hati, Ministre des Travaux Publics, Transports et Communications, Fvrier 2011, Hati. -NBCC 2005: National Building Code of Canada, vol1, National Research Council of Canada 2005. -NCSE-02: Norma de construccin sismorresistente de Espaa. BOE num.244, Viernes 11 Octubre 2002. -NEHRP, 2009. Recommended Provisions for Seismic Regulations for new Buildings and Other Structures, FEMA P-750, February, Part 1 (Provisions) and Part 2 (Commentary). -R-001 (2011): Reglamento para el anlisis y diseo ssmico de estructuras de Repblica Dominicana. Decreto No. 201-11. Ministerio de Obras Pblicas y Comunicaciones.

  11. Laboratory and field measurements of organic aerosols with the photoionization aerosol mass spectrometer

    NASA Astrophysics Data System (ADS)

    Dreyfus, Matthew A.

    Analytical methods developed to sample and characterize ambient organic aerosols often face the trade-off between long sampling times and the loss of detailed information regarding specific chemical species present. The soft, universal ionization scheme of the Photoionization Aerosol Mass Spectrometer (PIAMS) allows for identification of various chemical compounds by a signature ion, often the molecular ion. The goal of this thesis work is to apply PIAMS to both laboratory and field experiments to answer questions regarding the formation, composition, and behavior of organic aerosols. To achieve this goal, a variety of hardware and software upgrades were administered to PIAMS to optimize the instrument. Data collection and processing software were either refined or built from the ground up to simplify difficult or monotonous tasks. Additional components were added to PIAMS with the intent to automate the instrument, enhance the results, and make the instrument more rugged and user-friendly. These changes, combined with the application of an external particle concentration system (mini-Versatile Aerosol Concentration Enrichment System, m-VACES), allowed PIAMS to be suitable for field measurements of organic aerosols. Two such field campaigns were completed, both at the State of Delaware Air Quality Monitoring Site in Wilmington, Delaware: a one week period in June, 2006, and an 18 day period in October and November of 2007. A sampling method developed was capable of collecting sufficient ambient organic aerosol and analyzing it with a time resolution of 3.5 minutes. Because of this method, short term concentration changes of individual species can be tracked. Combined with meteorological data, the behavior of these species can be analyzed as a function of time or wind direction. Many compounds are found at enhanced levels during the evening/night-time hours; potentially due to the combined effects of temperature inversion, and fresh emissions in a cooler environment. The high-time resolution data shows that rapid concentration changes of a common individual species can be lost with traditional bulk sampling, and a time resolution of 30 minutes is suggested to accurately represent these changes. Using the mass spectra collected from the extended sampling campaign, source apportionment was performed with positive matrix factorization (PMF). The resulting model features six factors either correlated to specific sources (meat cooking, car emissions/road dust, diesel exhaust) or types of compounds (phthalates, alkanes/alkanoic acids, PAHs). The high-time resolution data allowed for the observation of specific trends in each factor's behavior as a function of time and wind direction relative to the receptor site. Elemental carbon/organic carbon (EC/OC) data is used to calculate the percentages of primary and secondary organic aerosol. Primary organic aerosol (POA) constituted the vast majority of the total carbon at 91% (an average of 2.8 +/- 1.1mug/m 3); 30% of which came from combustion, and 70% from non-combustion sources. These results can be explained by the PIAMS data: the diesel factor contributes to the combustion-related POA; the car/road dust, meat cooking, and alkane/alkanoic acid factors contribute the majority of non-combustion POA. The remaining factors represent <5% of the remaining OC. Considering the compatibility of data from the EC/OC and PIAMS, the ability of PIAMS to yield molecular species information to further define the primary and secondary organic aerosol factions is a distinct advantage in describing the behavior of the Wilmington organic aerosol. PIAMS was also applied to laboratory experiments. These experiments simulated complex environmental processes in order to focus on answering a central question. By mixing cholesterol aerosol with ozone in a smog chamber, and monitoring the concentration of cholesterol with PIAMS, the rate of reaction was determined. This rate indicates that cholesterol aerosol, which is a suggested source tracer, will remain in the ambient air for a few days under norma

  12. Ant nebula

    NASA Technical Reports Server (NTRS)

    1999-01-01

    A new Hubble Space Telescope image of a celestial object called the Ant Nebula may shed new light on the future demise of our Sun. The image is available at http://www.jpl.nasa.gov/pictures/wfpc .

    The nebula, imaged on July 20, 1997, and June 30, 1998, by Hubble's Wide Field and Planetary Camera 2, was observed by Drs. Raghvendra Sahai and John Trauger of NASA's Jet Propulsion Laboratory, Pasadena, Calif.; Bruce Balick of the University of Washington in Seattle; and Vincent Icke of Leiden University in the Netherlands. JPL designed and built the camera.

    The Ant Nebula, whose technical name is Mz3, resembles the head and thorax of an ant when observed with ground-based telescopes. The new Hubble image, with 10 times the resolution revealing 100 times more detail, shows the 'ant's' body as a pair of fiery lobes protruding from a dying, Sun- like star. The Ant Nebula is located between 3,000 and 6,000 light years from Earth in the southern constellation Norma.

    The image challenges old ideas about what happens to dying stars. This observation, along with other pictures of various remnants of dying stars called planetary nebulae, shows that our Sun's fate will probably be much more interesting, complex and dramatic than astronomers previously believed.

    Although the ejection of gas from the dying star in the Ant Nebula is violent, it does not show the chaos one might expect from an ordinary explosion, but instead shows symmetrical patterns. One possibility is that the central star has a closely orbiting companion whose gravitational tidal forces shape the outflowing gas. A second possibility is that as the dying star spins, its strong magnetic fields are wound up into complex shapes like spaghetti in an eggbeater. Electrically charged winds, much like those in our Sun's solar wind but millions of times denser and moving at speeds up to 1,000 kilometers per second (more than 600 miles per second) from the star, follow the twisted field lines on their way out into space.

    The Space Telescope Science Institute, Baltimore, Md., manages space operations for the Hubble Space Telescope for NASA's Office of Space Science, Washington, D.C. The Institute is operated by the Association of Universities for Research in Astronomy, Inc., for NASA under contract with NASA's Goddard Space Flight Center, Greenbelt, Md. The Hubble Space Telescope is a project of international cooperation between NASA and the European Space Agency. JPL is a division of the California Institute of Technology in Pasadena.

    Additional information about the Hubble Space Telescope is available at http://www.stsci.edu . More information about the Wide Field and Planetary Camera 2 is available at http://wfpc2.jpl.nasa.gov.

  13. Properties of Waste from Coal Gasification in Entrained Flow Reactors in the Aspect of Their Use in Mining Technology / W?a?ciwo?ci odpadw ze zgazowania w?gla w reaktorach dyspersyjnych w aspekcie ich wykorzystania w technologiach grniczych

    NASA Astrophysics Data System (ADS)

    Pomyka?a, Rados?aw

    2013-06-01

    Most of the coal gasification plants based of one of the three main types of reactors: fixed bed, fluidized bed or entrained flow. In recent years, the last ones, which works as "slagging" reactors (due to the form of generated waste), are very popular among commercial installations. The article discusses the characteristics of the waste from coal gasification in entrained flow reactors, obtained from three foreign installations. The studies was conducted in terms of the possibilities of use these wastes in mining technologies, characteristic for Polish underground coal mines. The results were compared with the requirements of Polish Standards for the materials used in hydraulic backfill as well as suspension technology: solidification backfill and mixtures for gob caulking. Wi?kszo?? przemys?owych instalacji zgazowania w?gla pracuje w oparciu o jeden z trzech g?wnych typw reaktorw: ze z?o?em sta?ym, dyspersyjny lub fluidalny. W zale?no?ci od rodzaju reaktora oraz szczeg?owych rozwi?za? instalacji, powstaj?ce uboczne produkty zgazowania mog? mie? r?n? posta?. Zale?y ona w du?ej mierze od stosunku temperatury pracy reaktora do temperatury topnienia cz??ci mineralnych zawartych w paliwie, czyli do temperatury mi?knienia i topnienia popio?u. W ostatnich latach bardzo du?? popularno?? w?rd instalacji komercyjnych zdobywaj? reaktory dyspersyjne "?u?luj?ce". W takich instalacjach ?u?el jest wychwytywany i studzony po wyp?yni?ciu z reaktora. W niektrych przypadkach oprcz ?u?la powstaje jeszcze popi? lotny, wychwytywany w systemach odprowadzania spalin. Mo?e by? on pozyskiwany oddzielnie lub te? zawracany do komory reaktora, gdzie ulega stopieniu. Wszystkie z analizowanych odpadw - trzy ?u?le oraz popi? pochodz? w?a?nie z tego typu instalacji. Tylko z jednej z nich pozyskano zarwno ?u?el jak i popi?, z pozosta?ych dwch jedynie ?u?el. Odpady te powsta?y, jako uboczny produkt zgazowania w?gla lub w?gla z dodatkami: bitumin (?u?el S1), czy biomasy (popi? A2, ?u?el S2). W polskim grnictwie podziemnym wyr?ni? mo?na kilka technologii podsadzkowych, w ktrych do transportu materia?u wykorzystywana jest woda. Tradycyjnie oraz ze wzgl?dw historycznych, terminem "podsadzka hydrauliczna" okre?la si? t?, ktra spe?nia wymagania normy PN-93/G-11010. Do najwa?niejszych cech takiej podsadzki hydraulicznej zaliczy? nale?y wype?nienia uprzednio wydzielonej pustki poeksploatacyjnej, materia?em o jak najmniejszej ?ci?liwo?ci oraz o jak najwi?kszej wodoprzepuszczalno?ci. Materia? taki, po odprowadzeniu wody ma stanowi? mechaniczna podpor? stropu, a proces podsadzania jest ?ci?le powi?zany z procesem eksploatacji, jako sposb likwidacji zrobw. Najcz??ciej stosowanymi materia?ami s? piasek podsadzkowy oraz odpady grnicze lub hutnicze (Lisowski, 1997). Od ponad dwudziestu lat, w polskim grnictwie w?gla kamiennego obecna jest rwnie? inna technologia podsadzkowa, w ktrej do transportu materia?w wykorzystywana jest woda. W tym przypadku cz??ci sta?e to materia?y drobnoziarniste, najcz??ciej popio?y r?nych typw, ktre po wymieszaniu z wod? tworz? zawiesin? (st?d termin "zawiesiny popio?owo-wodne"). Polska norma PN-G-11011:1998 wyr?nia dwie odmiany takich zawiesin i definiuje je, jako "podsadzk? zestalan?" oraz "mieszanin? do doszczelniania zrobw". Podstawow? ide? przy?wiecaj?c? stosowaniu zawiesin drobnoziarnistych w technologiach grniczych by?a pocz?tkowo troska o zagospodarowaniu odpadw energetycznych, a nast?pnie grniczych (Mazurkiewicz i in., 1998; Piotrowski i in., 2006; Piotrowski, 2010; Plewa i Mys?ek, 2000; Plewa i Sobota, 2002). Obecnie technologia zawiesinowa na sta?e zago?ci?a w kopalniach w?gla kamiennego staj?c si? m.in. nieodzownym ?rodkiem profilaktyki po?arowej i metanowej (Dziurzy?ski i Pomyka?a, 2006; Palarski, 2004; Pomyka?a, 2006). W artykule przedstawiono analiz? mo?liwo?ci wy