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1

Marco polo localization  

Microsoft Academic Search

We introduce the Marco Polo Localization approach, where we apply sound as a tool for gathering range measurements between robots, and use those to solve a range-only Simulta- neous Localization and Mapping problem. Range is calculated by correlating two recordings of the same sound, recorded on a pair of robots, after which the resulting time delay estimate is converted to

Eric Beowulf Martinson; Frank Dellaert

2003-01-01

2

The San Marco 5 mission  

Microsoft Academic Search

The satellite San Marco 5 was injected into a low equatorial orbit on March 25, 1988 from the Italian San Marco Range (Kenya) and reentered on December 6, 1988. It was the last and most complex spacecraft of the San Marco aeronomic satellites, developed under a cooperative research program between the University of Rome and NASA, with the participation of

L. Broglio; U. Ponzi; C. Arduini

1993-01-01

3

Marcos Moshinsky (1921-2009)  

NASA Astrophysics Data System (ADS)

This article contains a brief biography of Marcos Moshinsky together with a brief description of the legacy that he left behind. Portrait of Marcos Moshinsky Marcos Moshinsky (1921-2009) at the age of 80 in a drawing by Renato Lemus Casillas.

Iachello, Francesco

2011-03-01

4

San Marco and evolutionary biology  

Microsoft Academic Search

Gould and Lewontin use San Marco, Venice, to criticise the adaptationist program in biology. Following their lead, the architectural\\u000a term “spandrel” is now widely used in biology to denote a feature that is a necessary byproduct of other aspects of the organism.\\u000a I review the debate over San Marco and argue that the spandrels are not necessary in the sense

Alasdair I. Houston

2009-01-01

5

The Mark 15 Marco Library and Recent Updating of the Marco Code  

SciTech Connect

This report discusses two tasks: (1) introduction of the Mark 15-MARCO library within the context of an overview of the methodology of MARCO and (2) assessment of the accuracy of MARCO calculations of the Mark 15 MOC at beginning of cycle.

Parks, P.B.

2001-08-09

6

Differential Binding of Inorganic Particles to MARCO  

PubMed Central

Alveolar macrophages (AM) in the lung have been documented to play pivotal roles in inflammation and fibrosis (silicosis) following inhalation of crystalline silica (CSiO2). In contrast, exposure to either titanium dioxide (TiO2) or amorphous silica (ASiO2) is considered relatively benign. The scavenger receptor macrophage receptor with collagenous structure (MARCO), expressed on AM, binds and internalizes environmental particles such as silica and TiO2. Only CSiO2 is toxic to AM, while ASiO2 and TiO2 are not. We hypothesize that differences in induction of pathology between toxic CSiO2 and nontoxic particles ASiO2 and TiO2 may be related to their differential binding to MARCO. In vitro studies with Chinese hamster ovary (CHO) cells transfected with human MARCO and mutants were conducted to better characterize MARCO-particulate (ASiO2, CSiO2, and TiO2) interactions. Results with MARCO-transfected CHO cells and MARCO-specific antibody demonstrated that the scavenger receptor cysteine-rich (SRCR) domain of MARCO was required for particle binding for all the tested particles. Only TiO2 required divalent cations (viz., Ca+2 and/or Mg+2) for binding to MARCO, and results from competitive binding studies supported the notion that TiO2 and both the silica particles bound to different motifs in SRCR domain of MARCO. The results also suggest that particle shape and/or crystal structure may be the determinants linking particle binding to MARCO and cytotoxicity. Taken together, these results demonstrate that the SRCR domain of MARCO is required for particle binding and that involvement of different regions of SRCR domain may distinguish downstream events following particle binding.

Thakur, Sheetal A.; Hamilton, Raymond; Pikkarainen, Timo; Holian, Andrij

2009-01-01

7

MARCO SOMALVICO 'S LEGACY ON MULTIAGENT SYSTEMS  

Microsoft Academic Search

In this paper we present Marco Somalvico's and our research on multiagent systems through the parallelism with the three parts of the human cerebral cortex devoted to self-preservation, to emotions and feelings, and to the activities related to the use of symbolic language. The proposed taxonomy, firstly inspired by Marco himself, reflects his tendency to abstraction and to bridging together

Francesco Amigoni; Nicola Gatti; Viola Schiaffonati

8

Tidal analysis of the San Marco V and San Marco III: Density data in equatorial orbit  

Microsoft Academic Search

This paper presents an analysis of the diurnal density variations between ~200 km and 400 km as evidenced by a data set of unique characteristics, namely the density data collected by the Drag Balance Instrument (DBI, Broglio et al., 1989; Arduini et al., 1993) on board the San Marco III (SM3) satellite (launched 1971) and San Marco V (SM5) satellite

C. Arduini; U. Ponzi; G. Laneve

1997-01-01

9

San Marcos Astronomical Project and Doctoral Prospectus  

NASA Astrophysics Data System (ADS)

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

Aguilar, M. L.

2009-05-01

10

76 FR 72369 - Safety Zone; Marco Island Marriott Charity Fireworks Display, Gulf of Mexico, Marco Island, FL  

Federal Register 2010, 2011, 2012, 2013

...safety zone on the waters of the Gulf of Mexico...Marco Island Marriott Charity Fireworks Display...fireworks over navigable waters of the United States...Marco Island Marriott Charity Fireworks Display...Marco Island Marriott Charity Fireworks Display...safety zone. All waters of the Gulf of...

2011-11-23

11

Análisis del futuro marco de referencia internacional  

NASA Astrophysics Data System (ADS)

La técnica de interferometría de muy larga línea de base (VLBI) se aplica hoy a la astrometría para el cálculo de posiciones precisas de radiofuentes extragalácticas. Por tratarse de objetos lejanos, sus movimientos propios aparentes pueden considerarse nulos; esta propiedad hace que los catálogos de radiofuentes extragalácticas VLBI constituyan la mejor materialización de un sistema de referencia celeste inercial definido cinemáticamente. La Unión Astronómica Internacional (IAU) recomendó la adopción de un nuevo sistema de referencia celeste internacional materializado por las coordenadas ecuatoriales de objetos extragalácticos observados con le técnica VLBI. Para superar la precisión astrométrica actual es necesaria una mejora en la modelización de aquellos fenómenos que pueden introducir desviaciones sistemáticas en el marco de referencia celeste. El objetivo de este trabajo es poner de manifiesto las sistematicidades presentes en los distintos marcos de referencia elaborados con el próposito de materializar el nuevo sistema de referencia celeste de la IAU. Para la comparación de los distintos marcos de referencia se propone un modelo de tres rotaciones diferenciales más un término lineal que procura absorber los efectos sistemáticos presentes en las coordenadas. Se analiza igualmente la estabilidad de la solución cuando se utilizan distintos conjuntos de objetos de definición.

Cionco, G. R.; Arias, E. F.

12

Discovering Marco Polo: A Resource Guide for Teachers.  

ERIC Educational Resources Information Center

|This guide is designed for teachers who wish to teach about Marco Polo and his travels to China during the 13th century. The guide was originally developed for use with a television series about Marco Polo; it can successfully be used independent of the series, however. A prologue gives the reader a basic introduction to what is known of the life…

Stanford Univ., CA. Stanford Program on International and Cross Cultural Education.

13

33 CFR 147.837 - Marco Polo Tension Leg Platform safety zone.  

Code of Federal Regulations, 2010 CFR

... 2009-07-01 false Marco Polo Tension Leg Platform safety zone. 147.837...SAFETY ZONES § 147.837 Marco Polo Tension Leg Platform safety zone. (a) Description. Marco Polo Tension Leg Platform, Green Canyon 608 (GC...

2009-07-01

14

33 CFR 147.837 - Marco Polo Tension Leg Platform safety zone.  

Code of Federal Regulations, 2013 CFR

... 2013-07-01 false Marco Polo Tension Leg Platform safety zone. 147.837...SAFETY ZONES § 147.837 Marco Polo Tension Leg Platform safety zone. (a) Description. Marco Polo Tension Leg Platform, Green Canyon 608 (GC...

2013-07-01

15

75 FR 22712 - Proposed Establishment of Class D Airspace; San Marcos, TX  

Federal Register 2010, 2011, 2012, 2013

...Establishment of Class D Airspace; San Marcos, TX AGENCY: Federal Aviation Administration...to establish Class D airspace at San Marcos, TX. Establishment of an air traffic...controlled airspace necessary at San Marcos Municipal Airport. The FAA is...

2010-04-30

16

78 FR 48293 - Amendment of Class D and Class E Airspace; San Marcos, TX  

Federal Register 2010, 2011, 2012, 2013

...of Class D and Class E Airspace; San Marcos, TX AGENCY: Federal Aviation Administration...amends Class D and Class E airspace at San Marcos, TX. Additional controlled airspace...Instrument Approach Procedures at San Marcos Municipal Airport and the...

2013-08-08

17

75 FR 41983 - Establishment of Class D Airspace; San Marcos, TX  

Federal Register 2010, 2011, 2012, 2013

...10-ASW-8] Establishment of Class D Airspace; San Marcos, TX AGENCY: Federal Aviation Administration...This action establishes Class D airspace for San Marcos Municipal Airport, San Marcos, TX. Establishment of an air traffic...

2010-07-20

18

OHMSETT 'High Seas' Performance Testing: MARCO Class V Oil Skimmer.  

National Technical Information Service (NTIS)

A MARCO Class V oil skimmer was tested at the U.S. Environmental Protection Agency's OHMSETT facility to determine the device's 'high seas' performance characteristics. Performance data was obtained for several simulated offshore wave conditions at variou...

G. F. Smith W. E. McCracken

1978-01-01

19

MarcoPolo-R near earth asteroid sample return mission  

Microsoft Academic Search

MarcoPolo-R is a sample return mission to a primitive Near-Earth Asteroid (NEA) proposed in collaboration with NASA. It will\\u000a rendezvous with a primitive NEA, scientifically characterize it at multiple scales, and return a unique sample to Earth unaltered\\u000a by the atmospheric entry process or terrestrial weathering. MarcoPolo-R will return bulk samples (up to 2 kg) from an organic-rich\\u000a binary asteroid to

Maria Antonietta Barucci; A. F. Cheng; P. Michel; L. A. M. Benner; R. P. Binzel; P. A. Bland; H. Böhnhardt; J. R. Brucato; A. Campo Bagatin; P. Cerroni; E. Dotto; A. Fitzsimmons; I. A. Franchi; S. F. Green; L.-M. Lara; J. Licandro; B. Marty; K. Muinonen; A. Nathues; J. Oberst; A. S. Rivkin; F. Robert; R. Saladino; J. M. Trigo-Rodriguez; S. Ulamec; M. Zolensky

2011-01-01

20

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

NASA Astrophysics Data System (ADS)

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

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

2007-05-01

21

Marco (Medical Record Communications) - System Concept, Design and Evaluation  

PubMed Central

MARCO, an interfacility communication system, has been designed to promote safe relevant health care delivery to the inner city pediatric patient receiving care in a network consisting of Boston City Hospital and its affiliated Neighborhood Health Centers. This application of computer technology to communication of medical information compiled on an individual patient in multiple locations has implications for private group practice as well as other urban networks similar to our own. This paper provides the MARCO system concept, the system design and evaluation of its success after two years of operation.

Moffatt, P. H.; Heisler, B. D.; Mela, W. D.; Alpert, J. J.; Goldstein, H.M.

1978-01-01

22

A detailed spin analysis of the San Marco 5 mission  

Microsoft Academic Search

The attitude of the San Marco 5 satellite flown in 1988 has been monitored by several sensors. Thus the history of the spin period is known with a high degree of accuracy. Because of the simple geometry (spherical body with several extremely long antennas) and the good mass balance (used for the accelerometer aboard) of the satellite it was possible

K. Enninghorst; M. Mönnighoff; M. Roemer

1995-01-01

23

Geochemical and Hydrologic Data for San Marcos Springs Recharge Characterization near San Marcos, Texas, November 2008-December 2010.  

National Technical Information Service (NTIS)

During 2008-10, the U.S. Geological Survey, in cooperation with the San Antonio Water System, collected geochemical and hydrologic data in Bexar, Comal, and Hays Counties, Texas, to define and characterize the sources of recharge to San Marcos Springs. Pr...

C. L. Crow

2012-01-01

24

78 FR 33263 - Proposed Amendment of Class D and Class E Airspace; San Marcos, TX  

Federal Register 2010, 2011, 2012, 2013

...of Class D and Class E Airspace; San Marcos, TX AGENCY: Federal Aviation Administration...amend Class D and Class E airspace at San Marcos, TX. Additional controlled airspace...Instrument Approach Procedures (SIAP) at San Marcos Municipal Airport and the...

2013-06-04

25

MarcoPolo-R mission: Tracing the origins  

NASA Astrophysics Data System (ADS)

MarcoPolo-R is a sample return mission to a primitive binary Near-Earth Asteroid (NEA) selected for the Assessment Study Phase (2011-2013) of M3 class missions in the framework of ESA's Cosmic Vision (CV) 2 programme. The mission will answer to the fundamental CV questions "How does the Solar System work?" and "What are the conditions for life and planetary formations?".

Barucci, M. A.; Michel, P.; Böhnhardt, H.; Dotto, E.; Ehrenfreund, P.; Franchi, I. A.; Green, S. F.; Lara, L.-M.; Marty, B.; Koschny, D.; Agnolon, D.; Romstedt, J.; Martin, P.

2012-09-01

26

Marco Polo: Near-Earth Object Sample Return Mission  

NASA Astrophysics Data System (ADS)

MARCO POLO is a joint European-Japanese sample return mission to a Near-Earth Object (NEO), selected by ESA in the framework of COSMIC VISION 2015-2025 for an assessment study scheduled to last until October 2009. This Euro-Asian mission will go to a primitive Near-Earth Object (NEO), such as C or D-type, scientifically characterize it at multiple scales, and bring samples back to Earth for detailed scientific investigation. NEOs are part of the small body population in the Solar System, which are leftover building blocks of the Solar System formation process. They offer important clues to the chemical mixture from which planets formed about 4.6 billion years ago. The scientific objectives of Marco Polo will therefore contribute to a better understanding of the origin and evolution of the Solar System, the Earth, and the potential contribution of primitive material to the formation of Life. Marco Polo is based on a launch with a Soyuz Fregat and consists of a Mother Spacecraft (MSC), possibly carrying a lander. The MSC would approach the target asteroid and spend a few months for global characterization of the target to select a sampling site. Then, the MSC would then descend to retrieve several samples which will be transferred to a Sample Return Capsule (SRC). The MSC would return to Earth and release the SRC into the atmosphere for ground recovery. The sample of the NEO will then be available for detailed investigation in ground-based laboratories. In parallel to JAXA considering how to perform the mission, ESA has performed a Marco Polo study in their Concurrent Design Facility (CDF). Two parallel industrial studies will start in September 2008 to be conducted in Europe for one year. The scientific objectives addressed by the mission and the current status of the mission study (ESA-JAXA) will be presented and discussed.

Antonieta Barucci, Maria; Yoshikawa, M.; Koschny, D.; Boehnhardt, H.; Brucato, J. R.; Coradini, M.; Dotto, E.; Franchi, I. A.; Green, S. F.; Josset, J. L.; Kawagushi, J.; Michel, P.; Muinonen, K.; Oberst, J.; Yano, H.; Binzel, R. P.; Marco Polo Science Team

2008-09-01

27

HSV-1 exploits the innate immune scavenger receptor MARCO to enhance epithelial adsorption and infection  

PubMed Central

HSV-1 is an important epithelial pathogen and has the potential for significant morbidity in humans. Here we demonstrate that a cell surface scavenger receptor, macrophage receptor with collagenous structure (MARCO), previously thought to enhance antiviral defense by enabling nucleic acid recognition, is usurped by HSV-1 and functions together with heparan sulfate proteoglycans to mediate adsorption to epithelial cells. Ligands of MARCO dramatically inhibit HSV-1 adsorption and infection of human keratinocytes and protect mice against infection. HSV-1 glycoprotein C (gC) closely co-localizes with MARCO at the cell surface, and gC binds directly to purified MARCO with high affinity. Increasing MARCO expression enhances HSV-1 infection while MARCO-/- mice have reduced susceptibility to infection by HSV-1. These findings demonstrate that HSV-1 binds to MARCO to enhance its capacity for disease, and suggests a new therapeutic target to alter pathogenicity of HSV-1 in skin infection.

MacLeod, Daniel T.; Nakatsuji, Teruaki; Yamasaki, Kenshi; Kobzik, Lester; Gallo, Richard L.

2013-01-01

28

MarcoPolo-R: Asteroid Sample Return Mission  

NASA Astrophysics Data System (ADS)

MarcoPolo-R is a sample return mission to a primitive Near-Earth Asteroid (NEA) selected for the assessment study in the framework of ESA Cosmic Vision 2015-25 program. MarcoPolo-R is an European-led mission with a proposed NASA contribution. MarcoPolo-R will rendezvous with a primitive carbon-rich NEA, scientifically characterize it at multiple scales, and return a unique sample to Earth unaltered by the atmospheric entry process or terrestrial weathering. The baseline target is a binary asteroid (175706) 1996 FG3, which offers a very efficient operational and technical mission profile. A binary target also provides enhanced science return. The choice of this target will allow new investigations to be performed more easily than at a single object, and also enables investigations of the fascinating geology and geophysics of asteroids that are impossible at a single object. Several launch windows have been identified in the time-span 2020-2024. The baseline mission scenario of MarcoPolo-R to 1996 FG3 foresees a single primary spacecraft, carrying the Earth re-entry capsule and sample acquisition and transfer system, launched by a Soyuz-Fregat rocket from Kourou. The scientific payload includes state-of-the-art instruments, e.g. a camera system for high resolution imaging from orbit and on the surface, spectrometers covering visible, near-infrared and mid-infrared wavelengths, a neutral-particle analyser, a radio science experiment and optional laser altimeter. If resources are available, an optional Lander will be added to perform in-situ characterization close to the sampling site, and internal structure investigations. MarcoPolo-R will allow us to study the most primitive materials available to investigate early solar system formation processes. The main goal of the MarcoPolo-R mission is to return unaltered NEA material for detailed analysis in ground-based laboratories. Only in the laboratory can instruments with the necessary precision and sensitivity be applied to individual components of the complex mixture of materials that forms an asteroid regolith, in orer to determine their precise chemical, mineralogical and isotopic composition. Such measurements are vital for revealing the evidence of stellar, interstellar medium, pre-solar nebula and parent body processes that are retained in primitive asteroidal material. In addition to addressing the exciting science goals, the MarcoPolo-R mission also involves technologies for which technical development programmes are well under way. It is the ideal platform to (i) demonstrate innovative capabilities such as: accurate planetary navigation and landing, sample return operational chain; (ii) prepare the next generation of curation facilities for extra-terrestrial sample storage and analysis; (iii) develop high speed re-entry capsule; (iv) pave the way as a pathfinder mission for future sample returns from bodies with high surface gravity.

Brucato, John Robert

2012-07-01

29

MARCO POLO: near earth object sample return mission  

NASA Astrophysics Data System (ADS)

MARCO POLO is a joint European-Japanese sample return mission to a Near-Earth Object. This Euro-Asian mission will go to a primitive Near-Earth Object (NEO), which we anticipate will contain primitive materials without any known meteorite analogue, scientifically characterize it at multiple scales, and bring samples back to Earth for detailed scientific investigation. Small bodies, as primitive leftover building blocks of the Solar System formation process, offer important clues to the chemical mixture from which the planets formed some 4.6 billion years ago. Current exobiological scenarios for the origin of Life invoke an exogenous delivery of organic matter to the early Earth: it has been proposed that primitive bodies could have brought these complex organic molecules capable of triggering the pre-biotic synthesis of biochemical compounds. Moreover, collisions of NEOs with the Earth pose a finite hazard to life. For all these reasons, the exploration of such objects is particularly interesting and urgent. The scientific objectives of MARCO POLO will therefore contribute to a better understanding of the origin and evolution of the Solar System, the Earth, and possibly Life itself. Moreover, MARCO POLO provides important information on the volatile-rich (e.g. water) nature of primitive NEOs, which may be particularly important for future space resource utilization as well as providing critical information for the security of Earth. MARCO POLO is a proposal offering several options, leading to great flexibility in the actual implementation. The baseline mission scenario is based on a launch with a Soyuz-type launcher and consists of a Mother Spacecraft (MSC) carrying a possible Lander named SIFNOS, small hoppers, sampling devices, a re-entry capsule and scientific payloads. The MSC leaves Earth orbit, cruises toward the target with ion engines, rendezvous with the target, conducts a global characterization of the target to select a sampling site, and delivers small hoppers (MINERVA type, JAXA) and SIFNOS. The latter, if added, will perform a soft landing, anchor to the target surface, and make various in situ measurements of surface/subsurface materials near the sampling site. Two surface samples will be collected by the MSC using “touch and go” manoeuvres. Two complementary sample collection devices will be used in this phase: one developed by ESA and another provided by JAXA, mounted on a retractable extension arm. After the completion of the sampling and ascent of the MSC, the arm will be retracted to transfer the sample containers into the MSC. The MSC will then make its journey back to Earth and release the re-entry capsule into the Earth’s atmosphere.

Barucci, M. A.; Yoshikawa, M.; Michel, P.; Kawagushi, J.; Yano, H.; Brucato, J. R.; Franchi, I. A.; Dotto, E.; Fulchignoni, M.; Ulamec, S.

2009-03-01

30

Video Gallery: Drs. Charles Liu & Orsola De Marco  

NSDL National Science Digital Library

This online video gallery is from the Museum's Seminars on Science, a series of distance-learning courses designed to help educators meet the new national science standards. Part of the Frontiers in Physical Science seminar, the gallery features two videos, available in broadband and modem formats, and with printable PDF transcripts. Dr. Charles Liu gives a quick look at his research on galaxies and the wide range in galaxy size. Dr. Orsola De Marco provides a brief overview of the "life cycle of stars" and the museum's Scales of the Universe Exhibit.

31

Final Evaluation Report of the San Marcos Independent School District's Bilingual Education Program.  

ERIC Educational Resources Information Center

|The program covers two public school districts, Harlandale and San Marcos, and Southwest Texas State University. This report, however, deals only with the San Marcos Bilingual Education Program, which provides bilingual education for pupils in grades K-5 who have limited English speaking ability. Due to parental requests, 19% monolingual English…

Harrison, Helene W.

32

Geochemical and hydrologic data for San Marcos Springs recharge characterization near San Marcos, Texas, November 2008--December 2010  

USGS Publications Warehouse

During 2008–10, the U.S. Geological Survey, in cooperation with the San Antonio Water System, collected geochemical and hydrologic data in Bexar, Comal, and Hays Counties, Texas, to define and characterize the sources of recharge to San Marcos Springs. Precipitation samples were collected for stable isotope analysis at 1 site and water-quality samples were collected at 7 springs, 21 wells, and 9 stream sites in the study area between November 2008 and December 2010. Continuous water-quality monitors were installed in three springs, two wells, and at one stream site. Three continuous stream-gaging stations were installed to measure gage height and a stagedischarge rating was developed at two of the three sites. Depth to water below land surface was continuously measured in two wells.

Crow, Cassi L.

2012-01-01

33

Rankings de investigación en economía en España: instituciones y autores (1990-1999)  

Microsoft Academic Search

En este trabajo se analiza la producción científica los investigadores españoles, o que trabajan en instituciones españolas, en el área de Economía durante la década de los noventa. Se utilizan varios índices bibliométricos para elaborar rankings por instituciones e investigadores que pueden resultar útiles para varios tipos de potenciales usuarios. Entre ellos se encuentran las agencias de evaluación de investigación

Juan José Dolado; Antonio García-Romero; Gema Zamarro

2001-01-01

34

Marco Polo : an Italian Mission Scoring a lot of Records  

NASA Astrophysics Data System (ADS)

The first astronaut of the European Astronaut Corps of Italian nationality, Roberto Vittori, will fly on a Soyuz capsule at the end of April 2002, opening a new era of space flight. The mission, sponsored by the Italian Space Agency, has been developed in the framework of an ESA- ROSAVIAKOSMOS agreement, reached in order to give European astronauts additional possibilities to fly. It's the first mission of this kind. In addition to that, this is the real first time in which a Soyuz mission is in the hands of two cosmonauts, and one of them is non Russian. On the same flight, in fact, Mark Shuttleworth, the second tourist in the history of space activities, is going to fly, performing also a set of scientific experiments. Marco Polo is also the first mission in which the two Agencies, ASI and ESA, are developing a joint commercialisation program, devoted to attire sponsors for improving research and development activities in the Human Spaceflight area. This will allow the two agencies to improve also the quality of life on Earth. A comprehensive scientific program is also foreseen accompanying Vittori on board, mainly in the field of life science. Experiments devoted to neurophysiology, arms rehabilitation, test of new materials for dressing in space, evaluation of the behaviour of the Nobel Prize Montalcini discovery named NGF (Nerve Growth Factor) will be performed on board. A R&D payload for Blood Pressure Measurements could have in the future commercial spin-off. In addition, a possible institutional sponsorship of the World Health Organization is under discussion. It will be the real first time in which a space mission gets this kind of sponsorship, and this strictly related to the World Health Day this year, devoted in promoting health throughout movement, i.e. "Move for Health". The Italian Space Agency proposed a joint combination of the two slogans, coupling the "Move for Health" message with the Italian "Space for Health" one. This is because of the Marco Polo scientific program, and because of an advanced training and rehabilitation protocol we have studied, to be applied to old population in order to improve their quality of life, through the parallelism between astronauts (in microgravity conditions) and aging population. The mission, at the time of the World Space Congress, will be already performed and the results can be presented.

di Pippo, Simonetta; Bracciaferri, Fabio M.

2002-01-01

35

Trasferimenti normali e anormali di capitali: attualità del pensiero di Marco Fanno - Normal and Abnormal International Capital Transfers: the Current Relevance of Marco Fanno ‘s Thought  

Microsoft Academic Search

This work takes a second look at Marco Fanno’s thoughts on the nature, causes, and effects of international capital movements, placing the issue into the broader context of Fanno’s theory of the business cycle and development. This study is based on the 1939 American edition on normal and abnormal capital transfers, which contains newer features different from those in the

Giovanni Scannagatta Scannagatta

1995-01-01

36

Valorización de los residuos sólidos en la ciudad universitaria de la Universidad Nacional Mayor de San Marcos VALORIZATION OF THE SOLID WASTES IN THE SAN MARCOS UNIVERSITY CITY  

Microsoft Academic Search

The University Campus of the San Marcos Major National University with 20 faculties and 59 vocational schools holds above 12,000 students spending an average of 6 hours per day in the University Campus. Each school has a cafeteria for students, professors and clerical staff. All these persons generate solid residues. One of the most serious environmental problems of the current

Godelia Canchari Silverio; Oswaldo Ortiz Sanchez

37

Radar Tomography of Asteroids ASSERT / Marco Polo-R  

NASA Astrophysics Data System (ADS)

The internal structure of NEAs remains largely unknown. It is a key point for the understanding of asteroid accretion and dynamical evolution. From a science point of view, the internal structure is also a key point for the understanding of asteroid accretion and dynamical evolution. For risk management and mitigation, it is required to characterize whether a small asteroid will survive the transit through the atmosphere and also to define a deflection policy. There are some indirect evidences that a rubble pile structure is really common at least for objects larger than a few hundreds of meters in diameter. But a more precise characterisation of the internal structure is required, such as the size and the structure of the main blobs and their distribution within the NEAs main body as well as a statistical characterisation of the surface regolith in term of density and size distribution. Radar tomography is the only way to image the internal structure from decimetric to global scale in order to better understand the nature of the primary object and its posterior alterations. It is also a way to estimate the ratio between micro- and macro-porosity. Bistatic radar tomography is an original technique, developed with the CONSERT Experiment (Rosetta / ESA) to image ant characterize the internal structures of 67P/Churyumov-Gerasimeko with a signal transmitted from the Orbiter to the Lander. By regards to a more classical monostatic radar like Marsis (MarsExpress/ESA), this bistatic configuration requires limited resources (mass, power and dataflow) and increases the capacity of deep sounding. So ASSERT (ASteroid Sounding Experiment by Radiowave Transmission) is proposed to instrument a MASCOT-type lander e.g. as payload of the ESA Marco Polo R mission (ESA). The first addressed question is a rubble pile or a monolithic body: For a rubble pile, the tomography will allow to estimate the size distribution of the boulders by direct imaging or statistical analysis of the scattered signal. The estimation of the mean permittivity of the blobs is a way to estimate the macro- versus micro-porosity. Its spatial variations highlight the heterogeneity of the parent bodies and segregation mechanism during reaccretion. - And for a monolithic object, we can expect only micro-porosity. Then images of the body interior and spatial distributions of the permittivity give the heterogeneity. In a further analysis, the characterization of the heterogeneity by statistical or imagery approach is a key point to understand asteroid accretion and evolution: - is this body accreted or re-accreted from the same material or not, from similar parent bodies or not? - is there some evidence of collisional metamorphism with change in the porosity and or mineralogy? - is there some evidence of metamorphism per hydration? This advanced interpretation will be based on the sample return analysis and constitutes a complete recontextualization of the analyzed samples at the global body scale

Herique, A.; Zine, S.; Barucci, A.; Biele, J.; Ho, T.; Kofman, W. W.; Krause, C.; Michel, P.; Plettemeier, D.; Prado, J.; Souyris, J.; Ulamec, S.; Assert Team

2011-12-01

38

The narrow angle camera of the MPCS suite for the MarcoPolo ESA Mission: requirements and optical design solutions  

Microsoft Academic Search

Possible optical designs of a Narrow Angle Camera (NAC) suitable for being the high resolution channel of the MarcoPolo Camera System for the MarcoPolo ESA mission are presented. The MarcoPolo mission objective is the rendezvous with a Near Earth Asteroid in order to fully characterize the body, to land on the surface and to return to Earth a sample of

Vania da Deppo; Gabriele Cremonese; Giampiero Naletto

2010-01-01

39

Local time and altitude variation of equatorial thermosphere midnight density maximum (MDM): San Marco drag balance measurements  

Microsoft Academic Search

We present the first study of the local time and altitude variation of the MDM, the density component of the equatorial midnight pressure bulge, an important feature in the nighttime motions of the ionosphere-thermosphere system in the equatorial region. The neutral density data of the San Marco 3 (SM3) and San Marco 5 (SM5) satellites were averaged to obtain 24

C. Arduini; G. Laneve; F. A. Herrero

1997-01-01

40

The San Marcos River Habitat Conservation Plan: Using HCP's as a Tool for Ecological Restoration  

NASA Astrophysics Data System (ADS)

The San Marcos River in San Marcos, Hays County, Texas is a biologically unique system with several listed species found in the headwaters. Flowing from the Edwards Aquifer and the second largest spring system in Texas, the water is clear and thermally constant. The physical and biological character of the habitat within and surrounding the river has been severely degraded by human activity. As a means of dealing with the continued disturbance and finding a balance between human needs and conservation, the San Marcos River Habitat Conservation Plan was written as provided by Section 10(a) of the Endangered Species Act. The plan provides habitat mitigation for the fountain darter (Etheostoma fonticola), Comal Springs riffle beetle, (Heterelmis comalensis), and San Marcos salamander (Eurycea nana), while allowing for incidental take resulting from specific restoration and management projects. We used a science-based ecological/experimental approach to address some of the problems and optimize solutions, including restoration of stream banks damaged from overuse, planning for permanent access points and trails, removal of silt deposits caused by extensive flood control structures, wet-pond construction, managing flow, and the control of submerged and emergent non-native vegetation to improve habitat and enhance recreation.

Winters, J. M.; Howard, M. S.; Arsuffi, T. L.

2005-05-01

41

Solar EUV\\/UV and equatorial airglow measurements from San Marco-5  

Microsoft Academic Search

Preliminary results of the solar flux measurements performed by the Airglow-Solar Spectrometer Instrument (ASSI) aboard the San Marco-5 satellite in March-December 1988 are presented. Emphasis is placed on the in-flight performance of the ASSI, its in-flight calibration, and the planned scheme of the airglow modelling.

G. Schimdtke; H. Doll; C. Wita; S. Chakrabarti

1991-01-01

42

Solar EUV irradiance from the San Marco ASSI - A reference spectrum  

Microsoft Academic Search

The only satellite measurement of the solar EUV irradiance during solar cycle 22 has been obtained with the Airglow Solar Spectrometer Instrument (ASSI) aboard the San Marco 5 satellite flown in 1988. The ASSI in-flight calibration parameters are established by using the internal capabilities of ASSI and by comparing ASSI results to the results from other space-based experiments on the

Gerhard Schmidtke; Thomas N. Woods; John Worden; Gary J. Rottman; Harry Doll; Claus Wita; Stanley C. Solomon

1992-01-01

43

Dispersal of Native and Nonnative Aquatic Plant Species in the San Marcos River, Texas  

Microsoft Academic Search

The San Marcos River is a spring-fed system which origi- nates from the Edwards Aquifer, south of Austin, Texas. Due to excellent water clarity, and consistent temperatures and flows, a diverse community of native and nonnative aquatic plants have developed, including Hydrilla verticillata. Samples were collected quarterly of floating plant fragments to deter- mine biomass loadings, fragment counts and establishment

CHETTA S. OWENS; JOHN D. MADSEN; R. MICHAEL SMART; R MICHAEL STEWART

44

Equatorial composition in the 137- to 225-km region from the San Marco 3 mass spectrometer  

Microsoft Academic Search

The neutral atmospheric composition experiment (Nace) carried by the San Marco 3 (SM 3) satellite measured the equatorial atmospheric composition during the reentry period of November 21-28, 1971. The mass density and molecular nitrogen density measured by the Nace are in agreement with values measured by rocket experiments and inferred from satellite experiments. The average total oxygen content measured by

George P. Newton; Wayne T. Kasprzak; David T. Pelz

1974-01-01

45

Calibration of the San Marco airglow-solar spectrometer instrument in the extreme ultraviolet  

Microsoft Academic Search

The San Marco 5 carried the airglow-solar spectrometer instrument (ASSI). This 18-channel spectrometer measured the solar and terrestrial radiation in the wavelength region between 20 and 700 nm for 9 months in 1988. The ASSI extreme ultraviolet (EUV) channels showed significant sensitivity changes during the mission. The sensitivity changes of the EUV channels are quantified by comparing ASSI solar EUV

John Worden; Thomas N. Woods; Gary J. Rottman; Gerhard Schmidtke; Hongsheng Tai; Harry G. Doll; Stanley C. Solomon

1996-01-01

46

Evaluation Report of the San Marcos Independent School District's Bilingual Education Program.  

ERIC Educational Resources Information Center

|The San Marcos Independent School District's Bilingual Education Program for 1972-73 was evaluated in this report. The program consisted of 684 students in grades K-5 in 4 elementary schools. The majority of these students were Mexican American with only 18% monolingual English speakers. The program's objectives were, first, to provide bilingual…

Harrison, Helene W.

47

Final Educational Accomplishment Audit of the San Marcos Independent School District's Bilingual Education Program.  

ERIC Educational Resources Information Center

|The final audit report (1972)73) on the Bilingual Education Program of the San Marcos Independent School District critiques the quality of the project and the audit. The 5 sections of the audit are: (1) introductory and general comments on the quality of the project evaluation and the comparative findings of the project evaluation and the audit;…

Prochnow, Harold G.

48

Diurnal density variations measured by the San Marco 3 satellite in the equatorial atmosphere  

Microsoft Academic Search

A first analysis is presented of the San Marco 3 density data which were obtained on a continuous instantaneous basis by the ''balance'' experiment during the period May 3 through November 2, 1971, in the latitude belt of +-3.2°. This analysis was carried out in two ways: selecting constant altitude points (200 to 350 km) over a perigee revolution (24-hr

L. Broglio; C. Arduini; C. Buongiorno; U. Ponzi; G. Ravelli

1976-01-01

49

The DeMarco factor: interview with a health policy advocate.  

PubMed

An interview with Vincent DeMarco, President of the Maryland Citizen's Health Initiative, reviews the history and strategies used to win victories for public health on gun policy and tobacco taxes and to seek passage of higher alcohol taxes in the state of Maryland. DeMarco emphasizes the need to build broad coalitions, to engage policy makers at election time and not just or primarily during legislative sessions, and to take advantage of the power of the news media as a microphone for reaching millions of possible supporters. The interview concludes with recommendations for public health training and practitioners in order to become successful policy advocates in a rapidly changing media and political landscape. PMID:20495097

Jernigan, David H

2010-05-01

50

Evaluation of Acoustic Doppler Velocity Meters to Quantify Flow From Comal Springs and San Marcos Springs, Texas.  

National Technical Information Service (NTIS)

Comal Springs and San Marcos Springs are the two largest springs in Texas, are major discharge points for the San Antonio segment of the Edwards aquifer, and provide habitat for several Federally listed endangered species that depend on adequate springflo...

M. O. Gary R. H. Gary W. H. Asquith

2008-01-01

51

Characterization of immortalized MARCO and SR-AI/II-deficient murine alveolar macrophage cell lines  

PubMed Central

Background Alveolar macrophages (AM) avidly bind and ingest unopsonized inhaled particles and bacteria through class A scavenger receptors (SRAs) MARCO and SR-AI/II. Studies to characterize the function of these SRAs have used AMs from MARCO or SR-AI/II null mice, but this approach is limited by the relatively low yield of AMs. Moreover, studies using both MARCO and SR-AI/II-deficient (MS-/-) mice have not been reported yet. Hence, we sought to develop continuous cell lines from primary alveolar macrophages from MS-/- mice. Results We used in vitro infection of the primary AMs with the J2 retrovirus carrying the v-raf and v-myc oncogenes. Following initial isolation in media supplemented with murine macrophage colony-stimulating factor (M-CSF), we subcloned three AM cell lines, designated ZK-1, ZK-2 and ZK-6. These cell lines grow well in RPMI-1640-10% FBS in the absence of M-CSF. These adherent but trypsin-sensitive cell lines have a doubling time of approximately 14 hours, exhibit typical macrophage morphology, and express macrophage-associated cell surface Mac-1 (CD11b) and F4/80 antigens. The cell lines show robust Fc-receptor dependent phagocytosis of opsonized red blood cells. Similar to freshly isolated AMs from MS-/- mice, the cell lines exhibit decreased phagocytosis of unopsonized titanium dioxide (TiO2), fluorescent latex beads and bacteria (Staphylococcus aureus) compared with the primary AMs from wild type (WT) C57BL/6 mice. Conclusion Our results indicated that three contiguous murine alveolar macrophage cell lines with MS-/- (ZK1, ZK2 and ZK6) were established successfully. These cell lines demonstrated macrophage morphology and functional activity. Interestingly, similar to freshly isolated AMs from MS-/- mice, the cell lines have a reduced, but not absent, ability to bind and ingest particles, with an altered pattern of blockade by scavenger receptor inhibitors. These cell lines will facilitate in vitro studies to further define MARCO and SR-AI/II function, and may also be useful to identify other novel scavenger-type macrophage receptors and for additional studies of particle toxicology.

Zhou, Hongwei; Imrich, Amy; Kobzik, Lester

2008-01-01

52

Sample return from a Near Earth Object: Future perspectives from Marco Polo.  

NASA Astrophysics Data System (ADS)

We are entering in a new era of space exploration defined by sample return missions. The study of extraterrestrial samples in the laboratory has given us many insights to Solar System formation and evolution, but is hampered by having to rely on the arrival of meteorites -fairly random samples from asteroids, the Moon and Mars. There is now increased interest from the scientific community in the acquisition of samples from specific parent-bodies; this is reflected by proposals for an increasing number of sample return missions within international programs of Solar System exploration. The study of extraterrestrial samples in laboratory provides new opportunities to advance fun-damental issues on the origin and evolution of the Solar System, on primordial cosmochemistry and on nature of the building blocks of terrestrial planets. Samples returned from primitive carbonaceous small bodies could help us in deciphering relevant clues on the origin and early evolution of life on Earth. Once returned on Earth, samples will undergo preliminary charac-terization and classification within dedicated sample curation facilities before being delivered to worldwide laboratories for detailed investigation of the elemental and isotopic compositions, mineralogy, petrology, organic and interstellar grain inventories, etc. The samples returned from the surface of a primitive NEO will contain material more primitive than currently avail-able from meteorites as this is generally lost during atmospheric entry, with only more coherent meteorites, the product of asteroidal modification, surviving to be collected on the surface of the Earth. Marco Polo was shortlisted for the assessment phase of ESA's Cosmic Vision program to perform a sample return from a primitive Near-Earth Object (NEO), such as a C-or D-type asteroid or extinct comet. Although the scientific objectives were very highly rated it was not selected for mission development as an ESA-only Medium Mission because it exceeded cost envelope. However, in view of the evolving international context, Marco Polo has gathered the interest of a huge scientific community and it is now proposed as a potential participation in missions currently under discussion within other agencies. In this talk Marco Polo's scientific case and future perspectives will be presented.

Brucato, John Robert; Barucci, M. A.; Boehnhardt, Hermann; Dotto, Elisabetta; Franchi, Ian; Green, Simon F.; Josset, Jean-Luc; Michel, Patrick; Muinonen, Karri; Oberst, Juergen; Binzel, Richard P.; Koschny, Detlef; Agnolon, David; Romstedt, Jens

53

Uranium in the Surrounding of San Marcos-Sacramento River Environment (Chihuahua, Mexico)  

PubMed Central

The main interest of this study is to assess whether uranium deposits located in the San Marcos outcrops (NW of Chihuahua City, Mexico) could be considered as a source of U-isotopes in its surrounding environment. Uranium activity concentrations were determined in biota, ground, and surface water by either alpha or liquid scintillation spectrometries. Major ions were analyzed by ICP-OES in surface water and its suspended matter. For determining uranium activity in biota, samples were divided in parts. The results have shown a possible lixiviation and infiltration of uranium from geological substrate into the ground and surface water, and consequently, a transfer to biota. Calculated annual effective doses by ingestion suggest that U-isotopes in biota could not negligibly contribute to the neighboring population dose. By all these considerations, it is concluded that in this zone there is natural enhancement of uranium in all environmental samples analyzed in the present work.

Renteria-Villalobos, Marusia; Cortes, Manuel Reyes; Mantero, Juan; Manjon, Guillermo; Garcia-Tenorio, Rafael; Herrera, Eduardo; Montero-Cabrera, Maria Elena

2012-01-01

54

Automation of the Telescope in the Observatory at Texas State University-San Marcos  

NASA Astrophysics Data System (ADS)

The telescope in the Observatory at Texas State University - San Marcos is automated by means of off the shelf parts with a budget of 300.00. This telescope retrofit is to replace obsolete and malfunctioning hardware and update software. The telescope upgrade entailed the removal of all of the timeworn hardware and thorough testing of the motors and encoders to insure proper functionality. From a less expensive telescope a new motor control board is acquired that is capable of performing tasks beyond the capabilities of the old board. A Schmitt Trigger and a set of four capacitors in series are used to lessen the noise produced by the older model motors and encoders. All of the retrofitted hardware is tested to insure proper functionality for the final product before installation into the telescope. After final installation a problem with the communication between software and hardware was found and remedied.

Smith, Cary

2012-03-01

55

THERMAP : a mid-infrared spectro-imager for the Marco Polo R mission  

NASA Astrophysics Data System (ADS)

We present THERMAP, a mid-infrared (8-16 ?m) spectro-imager based on uncooled micro-bolometer detector arrays. Due to the recent technological development of these detectors, which have undergone significant improvements in the last decade, we wanted to test their performances for a space mission to small bodies in the inner Solar System. THERMAP was selected by ESA in January 2012 for a one year assessment study, in the framework of a call for declaration of interest in science instrumentation for the Marco Polo R Cosmic Vision mission. In this paper, we present some results of this study and in particular demonstrate that the new generation of uncooled micro-bolometer detectors has all the imaging and spectroscopic capabilities to fulfill the scientific objectives of the Marco Polo R mission. THERMAP scientific objectives - The midinfrared instrument of the Marco Polo R mission must be able i) to determine the surface temperature by mapping the entire surface with an absolute accuracy of at least 5 K (goal 1 K) above 200 K, ii) to determine the thermal inertia with an accuracy of 10% and iii) to determine the surface composition by mapping the entire surface with a spectral resolution of 70 between 8 and 16 ?m. The above mappings should be performed with a spatial resolution of 10 m for the entire surface (global characterization) and 10 cm for the sampling sites (local characterization). THERMAP imaging capabilities - In order to test the imaging capabilities of the THERMAP uncooled microbolometer detector, we set up an experiment based on a 640x480 ULIS micro-bolometer array, a germanium objective and a black body. Using the results of this experiment, we show that calibrated radiometric images can be obtained down to at least 258 K (lower limit of our experiment), and that two calibration points are sufficient to determine the absolute scene temperature with an accuracy better than 1.5 K. An extrapolation to lower temperatures provides an accuracy of about 5 K at 180 K, the lowest temperature the detector can measure. THERMAP spectroscopic capabilites - In order to test the spectroscopic performances of the detector, we added flux attenuating neutral density mid-infrared filters (transmittance: 50%, 10%, 1%) to our experiment. Our results show that we can perform spectroscopic measurements with a spectral resolution R=40-80 in the wavelength range 8-16 ?m for a scene temperature larger than 300 K, the typical surface temperature of a Near Earth Asteroid at 1 AU from the Sun. THERMAP preliminary design - From the above results, we defined a preliminary design for the instrument. THERMAP is a mid-infrared (8-16 ?m) spectro-imager based on two uncooled microbolometer arrays. It is composed of two channels, one for imaging and one for spectroscopy. A flip mirror allows switching between the two channels. Calibration is performed using deep space and two black bodies at known temperature. The design of the THERMAP instrument has a strong heritage from the MERTIS instrument on board Bepi-Colombo [1], which guarantees its feasibility and reliability. Our design is very flexible in term of operations, which is fundamental for a mission to a binary asteroid system (1996 FG3). The THERMAP instrument will be proposed for Marco Polo R and any future space missions to small bodies in the inner solar system.

Groussin, O.; Brageot, E.; Reynaud, J.-L.; Lamy, P.; Jorda, L.; Licandro, J.; Helbert, J.; Knollenberg, J.; Kührt, E.; Delbó, M.

2012-09-01

56

Geochemical evaluation of the geothermal resources in the San Marcos region, Guatemala  

USGS Publications Warehouse

The chemical and isotopic compositions of hot springs in the San Marcos region of Guatemala are internally consistent with a hydrologic model in which a deep 240??C reservoir and one or more shallow 195-200??C reservoirs are present. Variations in hot-spring water compositions results from a combination of boiling, mixing with cold, dilute water, and chemical re-equilibration with decreasing temperature. The recharge water for the deep 240??C reservoir is isotopically heavier than the local meteoric water and probably comes from many kilometers to the west or southwest. The water in the shallow reservoir is a mixture of the 240??C water with about 20 ?? 5% of cold, locally derived meteoric water. After mixing, the water in the shallow reservoir re-equilibrates with reservoir rock at 195-200??C. In some places additional mixing with cold water occurs after water leaves the shallow reservoir. ?? 1986.

Fournier, R. O.; Hanshaw, B. B.

1986-01-01

57

1996 FG3, MarcoPolo-R mission target: Living on the edge  

NASA Astrophysics Data System (ADS)

199FG3 is a binary asteroid, the nominal target of the MarcoPolo-R mission [1]. Its mass, size, spin rate and satellite orbital period are well estimated. Radar observations (from Arecibo and Goldstone) have also provided estimates of the primary shape and maximum separation of the secondary. The fast spin rate of the primary make it an extremely interesting object from a mechanical point of view as it is at the limit of rotational stability against reshaping and/or mass loss. This rare circumstance gives an outstanding added value to the mission because it may provide constraints on the internal structure of the primary and the mechanisms of formation of binary asteroids. The working group on mechanical properties of the MP-R mission has analysed 1996FG3's peculiar characteristics from a theoretical standpoint and through analysis of numerical experiments. Our conclusions may have consequences on the design and landing site choice of this unique mission.

Campo Bagatin, A.; Rossi, A.; Alemañ, R. A.; Michel, P.; Walsh, K. J.; Richardson, D. C.; Benavidez, P. G.; Murdoch, N.; Schwartz, S. R.

2012-09-01

58

Evaluation Report of the Bilingual Education Program. Harlandale Independent School District, San Marcos Independent School District, Southwest Texas State University. 1971-72.  

ERIC Educational Resources Information Center

|Bilingual classes in grades K-5 in the San Marcos and Harlandale (Texas) school districts comprise this bilingual education program. Most of the pupils come from Spanish-speaking homes with low socioeconomic-educational background; however, a certain proportion of the San Marcos pupils are Anglos. Program objectives include preventing educational…

Harrison, Helene W.

59

Evaluation Report of the Bilingual Education Program. Harlandale Independent School District, San Marcos Independent School District, Southwest Texas State University, 1969-70.  

ERIC Educational Resources Information Center

|The Bilingual Education Program for 1969-70 was evaluated in this report. The program consisted of 1,220 Mexican American pupils in grades 1-3 in Harlandale Independent School District, San Marcos Independent School District, and St. John's Catholic School in San Marcos. Its primary objective was to provide a learning situation to meet the…

Hughes, B. E.

60

New Observations and Proposed Meteorite Analogs of the MarcoPolo-R Target Asteroid (175706) 1996 FG3  

NASA Astrophysics Data System (ADS)

The MarcoPolo-R target asteroid 1996 FG3 made a close pass to Earth over the winter of 2011-2012. Observations in the 0.8-4 micrometer range indicate the presence of a 3-micrometer band and suggest a variation in spectral slopes on FG3's surface.

Rivkin, A. S.; Howell, E. S.; DeMeo, F. E.; Vervack, R. J.; Binzel, R. P.; Magri, C.; Nolan, M. C.; Fernandez, Y. R.; Cheng, A. F.; Barucci, M. A.; Michel, P.

2012-05-01

61

Comparison of the San Marco 3 Nace neutral composition data with the extrapolated Ogo 6 empirical model  

Microsoft Academic Search

Comparisons between the composition measurements of the San Marco 3 magnetic mass spectrometer and the altitude-extrapolated Ogo 6 composition model were made. At altitudes of 220, 250, and 280 km, where local time variations are significant, agreement between the measurements and model is within +- 30 percent for total oxygen content (O + 2Oâ) and mass density. Molecular nitrogen density

W. T. Kasprzak; G. P. Newton

1976-01-01

62

Investigation of the variation of the neutral density wave pattern on the basis of San Marco V data  

Microsoft Academic Search

Neutral density measurements by the Drag Balance Instrument (DBI) on board the Italian San Marco V satellite are made with high time resolution. These measurements permit the direct investigation of the thermospheric wave pattern variation in the equatorial zone. The investigation has been carried out not only statistically, but also through case studies. One of the interesting results is that,

I. Almár; E. Illés-Almár; P. Bencze; G. Laneve

1999-01-01

63

Study of the evening plasma drift vortex in the low-latitude ionosphere using San Marco electric field measurements  

Microsoft Academic Search

San Marco D electric field measurements have been averaged in terms of the equivalent E×B plasma drifts for days near the 1988 autumn equinox. The observed plasma drifts provide a satellite-based composite in altitude and local time of the evening enhancements in the zonal and vertical drifts and the shear in the zonal drift. The satellite data reveal details of

J. Vincent Eccles; Nelson Maynard; Gordon Wilson

1999-01-01

64

An Evaluation of Visible Implant Elastomer for Marking the Federally Listed Fountain Darter and the San Marcos Salamander  

Microsoft Academic Search

Visible marks can aid in population studies but, depending on the type of mark used, may result in poor retention and increased mortality. Visible implant elastomer (VIE) was evaluated as a marking technique for two species listed as endangered or threatened under the federal Endangered Species Act: The fountain darter Etheostoma fonticola and the San Marcos salamander Eurycea nana. We

Catherine T. Phillips; Joe N. Fries

2009-01-01

65

LA MÚSICA EN LA CORTE DE ENRIQUE DE CASTILLA (1454-1474). UNA APROXIMACIÓN INSTITUCIONAL Y PROSOPOGRÁFICA  

Microsoft Academic Search

En este artículo se analiza desde una perspectiva fundamentalmente prosopográfica la dinámica musical en la corte de Enrique IV de Castilla (1454-1474) haciendo, a su vez, especial hincapié en el papel social, artístico e institucional que los músicos desempeñaron dentro del complejo entramado de los servidores áulicos. Aquellos años, tan inestables en lo político, asistieron, sin embargo, a un desarrollo

Francisco de Paula Cañas Gálvez

2006-01-01

66

Marcos Zapata's "Last Supper": a feast of European religion and Andean culture.  

PubMed

In Marcos Zapata's 1753 painting of the Last Supper in Cuzco, Peru, Christian symbolism is filtered through Andean cultural tradition. Zapata was a late member of the Cuzco School of Painting, a group comprised of few European immigrants and handfuls of mestizo and Indian artists. The painters in Cuzco learned mostly from prints of European paintings, and their style tends to blend local culture into the traditional painting of their conquistadors. Imagery was the most successful tool used by the Spaniards in their quest to Christianize the Andean population. By teaching locals to paint Christian subjects, they were able to infuse Christianity into Andean traditions. Zapata's rendering of the Last Supper utilizes this cultural blending while staying true to the Christian symbolism within the subject. Instead of the traditional lamb, Zapata's Last Supper features a platter of cuy, or guinea pig, an Andean delicacy stocked with protein as well as cultural significance. Cuy was traditionally a sacrificial animal at Inca agricultural festivals and in this way it offers poignant parallel to the lamb, as a traditional Christian sacrificial animal. PMID:21568039

Zendt, Christina

2010-01-01

67

The Silk Road, Marco Polo, a Bible and its proteome: a detective story.  

PubMed

Around the end of XIII century (at the time of young Marco Polo's first trip to China at the court of Khubilai Khan in Khan Baliq) a pocket Bible was delivered by a Franciscan friar to the Mogul Emperor, in the framework of the evangelization program of the Far East. Four centuries later, in 1685, this Bible was rediscovered by the Jesuit Philippe Couplet in the house of a rich Chinese in Nanchin and donated to Cosimo III, Grand Duke of Tuscany. This Bible was recently "unearthed" in the Biblioteca Medicea Laurenziana in Florence, wrapped up in a precious yellow silk cloth, in a rather ruined state. After two years of restoration, the Bible will return to China in 2012 for a celebration of its >700years of life and of its remarkable return trip on the Silk Road. On account of the thinness of the parchment (barely 80?m thickness, the size of each foil being 16.5×11cm) it was widely held that the pages were produced from foetal lambskins. On tiny fragments of the margins of a foil, after several unsuccessful attempts at digesting the vellum, we were able to obtain a tryptic peptide mixture, which, upon mass spectrometry analysis, yielded the identity of 8 unique proteins, belonging to the genus Bos taurus, thus confirming the origin of the vellum from calfskins rather than from foetal lambskins. Our results prove that it is possible to obtain reliable protein extraction and IDs from ancient parchment documents. PMID:22504796

Toniolo, Lucia; D'Amato, Alfonsina; Saccenti, Riccardo; Gulotta, Davide; Righetti, Pier Giorgio

2012-04-04

68

FANTINA: Fathom Asteroids Now: Tomography and Imagery of a NEA- Payload For Marco Polo R CV3 / ESA mission  

NASA Astrophysics Data System (ADS)

The internal structure of small bodies is still poorly known and has never been measured directly. There is no way to determine from ground based observation whether the body is a monolithic piece of rock or a rubble-pile, an aggregate of boulders held together by gravity and how much porosity it contains, both in the form of micro-scale or macro-scale porosity. Knowing this structure is a key point for a better understanding of the asteroid accretion and dynamical evolution. It is the main objective of the FANTINA experience proposed Payload for Marco Polo R CV3 / ESA mission: FANTINA (Marco Polo's Daughter) for Fathom Asteroids Now: Tomography and Imagery of a NEA is to provide measurement capabilities and science data which are not accessible by remote sensing of the asteroid from the Marco-Polo R spacecraft alone and which complement the analysis of the returned samples. The FANTINA payload is a Lander carrying the ASSERT experiment and a complementary payload to be defined: ASSERT is a bistatic CONSERT/Rosetta-like radar to achieve the tomography both in transmission and in reflexion of the asteroid in order to characterise its composition and its heterogeneity from decimetric to global scale. The lander is a long-lived bus in the 10-kg class derived from MASCOT/Hayabusa 2. This paper reviews the science rationale of FANTINA in the context of the Marco Polo R mission to 1996FG3. The surface package concept will be reviewed including the radar tomography principles. So a preliminary design and budget will be done.

Herique, A.; Biele, J.; Bousquet, P.; Ciarletti, V.; Ho, T. M.; Issler, J. L.; Kofman, W.; Michel, P.; Plettemeier, D.; Puget, P.; Souyris, J. C.; Ulamec, S.; van Zoest, T.; Zine, S.

2012-04-01

69

Airglow-solar spectrometer instrument (20-700 nm) aboard the San Marco D\\/L satellite  

Microsoft Academic Search

The ASSI experiment aboard the San Marco D\\/L aeronomy satellite will monitor the airglow, solar, and interplanetary radiations from the EUV through the visible spectral regions. Four spectrometers with solar pointing control cover this broad region using channels with eighteen overlapping wavelength ranges with spectral resolutions from 0.8 to 3.0 nm, which are adequate for aeronomy. Large dynamic ranges up

G. Schmidtke; P. Seidl; C. Wita

1985-01-01

70

Integrated spatial assessment: a multicriteria approach to sustainable development of cultural and environmental heritage in San Marco dei Cavoti, Italy  

Microsoft Academic Search

Starting from the concept of “territory” and from the definition of “integrated assessment”, the paper defines the operational\\u000a dimensions of spatial integrated assessment (ISA), applying it to the territorial context of San Marco dei Cavoti (a rural\\u000a village in Southern Italy). In particular, the paper proposes an integration between analytic hierarchy process (AHP) and\\u000a geographic information system (GIS) for the

Luigi Fusco Girard; Pasquale De Toro

2007-01-01

71

Detection of an equatorial spread-F bubble by ground-based photometers and the San Marco 5 satellite  

Microsoft Academic Search

In the Fall of 1988, San Marco 5, instrumented with ion density and electric field experiments, made passes through the equatorial F-region in the Brazilian sector, where scanning photometers have been operated at Cachoeira Paulista, Brazil, for many years. We have cross-checked these large data sets and report here on one night of active spread-F with good data from both

J.-M. Jahn; J. La Belle; J. H. A. Sobral; T. L. Aggson; W. B. Hanson

1997-01-01

72

Marco Polo: International Small Solar System Body Exploration Mission in 2010's  

NASA Astrophysics Data System (ADS)

Since 2000, Japanese scientists and engineers have investigated new generation primitive body missions in the post-Hayabusa era in 2010's. Receiving the Minorbody Exploration Forum Final Report, ISAS established the nation-wide Small Body Exploration Working Group (SBE-WG) in 2004. After the successful exploration of the S-type NEO Itokawa by Hayabusa in 2005, the Hayabusa-2 concept emerged for a C-type asteroid sample return by the original Hayabusa spacecraft system with minor improvements and modifications. In parallel to that effort, the SBE-WG continued to develop the post-Hayabusa mission concept as "Hayabusa Mk-II," a fully model-changed, advanced spacecraft with the sample return capability from the most primitive bodies of the solar system. It is this Hayabusa Mk-II that has became the foundation of the International small body exploration concept "Marco Polo" since 2006. Jointly proposed to the first call of the ESA Cosmic Vision by scientists from Japan, Europe, and the U.S., the Marco Polo concept was selected as one of the M-class mission candidates for the assessment study phase in the fall of 2007. In 2008, the international joint study team has been created and its mission definitions, system requirements, and target selections are currently under the study. The top-level scientific themes are to decode the solar system formation and evolution in the astrobiology and astromineralogy contexts as one of the most important scientific challenges of 2010's. These themes are sub-divided into several objectives to be achieved by both instruments carried onboard the mother spacecraft (MSC), a large lander, or small hopping rovers and returned samples. The initial mission target candicdates include comet-asteroid transition (CAT) objects, D-type asteroids and C-type binary asteroids in near-Earth orbits. In the baseline scenario, a Soyuz launcher provided by ESA will launch the JAXA-made MSC with sampling and other in-situ science instruments provided by both JAXA and ESA, as well as the large European lander and a few small Japanese rovers as possible options, around 2018. In order to reach the CAT object Wilson-Harrington, MSC employs a cluster of improved ion engines inherited from the Hayabusa technology with the Earth gravity assist in the outbound interplanetary cruise. In 2022, the MSC will arrive the target and conduct global mapping and scientific investigation including sampling site selection in a few moths. Then the lander and rovers will be landed on the target surface to conduct cross-scale science being complementary to the MSC instruments and laboratory studies of returned samples. Toward the end of the stay, touch-and-go sequences for surface and possibly sub-surface sample collections will be attempted by taking advantages of operational experiences in the Hayabusa mission. In 2023, the MSC containing the collected samples inside the Earth return capsule will start the inbound cruise back to the Earth while the lander would continue to investigate in-situ the target surface. The sample delivery to the Earth and initial sample analyses, after the planetary quarantine procedure if necessary, will be expected in 2026.

Yano, Hajime

73

Origin and characteristics of discharge at San Marcos Springs based on hydrologic and geochemical data (2008–10), Bexar, Comal, and Hays Counties, Texas  

USGS Publications Warehouse

The Edwards aquifer in south-central Texas is a productive and important water resource. Several large springs issuing from the aquifer are major discharge points, popular locations for recreational activities, and habitat for threatened and endangered species. Discharges from Comal and San Marcos Springs, the first and second largest spring complexes in Texas, are used as thresholds in groundwater management strategies for the Edwards aquifer. Comal Springs is generally understood to be supplied by predominantly regional groundwater flow paths; the hydrologic connection of San Marcos Springs with the regional flow system, however, is less understood. During November 2008–December 2010, a hydrologic and geochemical investigation of San Marcos Springs was conducted by the U.S. Geological Survey (USGS) in cooperation with the San Antonio Water System. The primary objective of this study was to define and characterize sources of discharge from San Marcos Springs. During this study, hydrologic conditions transitioned from exceptional drought (the dry period, November 1, 2008 to September 8, 2009) to wetter than normal (the wet period, September 9, 2009 to December 31, 2010), which provided the opportunity to investigate the hydrogeology of San Marcos Springs under a wide range of hydrologic conditions. Water samples were collected from streams, groundwater wells, and springs at and in the vicinity of San Marcos Springs, including periodic (routine) sampling (every 3–7 weeks) and sampling in response to storms. Samples were analyzed for major ions, trace elements, nutrients, and selected stable and radiogenic isotopes (deuterium, oxygen, carbon, strontium). Additionally, selected physicochemical properties were measured continuously at several sites, and hydrologic data were compiled from other USGS efforts (stream and spring discharge). Potential aquifer recharge was evaluated from local streams, and daily recharge or gain/loss estimates were computed for several local streams. Local rainfall and recharge events were compared with physicochemical properties and geochemical variability at San Marcos Springs, with little evidence for dilution by local recharge.

Musgrove, MaryLynn; Crow, Cassi L.

2012-01-01

74

Macrophage receptor with collagenous structure (MARCO) is a dynamic adhesive molecule that enhances uptake of carbon nanotubes by CHO-K1 cells.  

PubMed

The toxicity of carbon nanotubes (CNTs), a highly promising nanomaterial, is similar to that of asbestos because both types of particles have a fibrous shape and are biopersistent. Here, we investigated the characteristics of macrophage receptor with collagenous structure (MARCO), a membrane receptor expressed on macrophages that recognizes environmental or unopsonized particles, and we assessed whether and how MARCO was involved in cellular uptake of multi-walled CNTs (MWCNTs). MARCO-transfected Chinese hamster ovary (CHO-K1) cells took up polystyrene beads irrespective of the particle size (20nm-1?m). In the culture of MARCO-transfected CHO-K1 cells dendritic structures were observed on the bottom of culture dishes, and the edges of these dendritic structures were continually renewed as the cell body migrated along the dendritic structures. MWCNTs were first tethered to the dendritic structures and then taken up by the cell body. MWCNTs appeared to be taken up via membrane ruffling like macropinocytosis, rather than phagocytosis. The cytotoxic EC(50) value of MWCNTs in MARCO-transfected CHO-K1 cells was calculated to be 6.1?g/mL and transmission electron microscopic observation indicated that the toxicity of MWCNTs may be due to the incomplete inclusion of MWCNTs by the membrane structure. PMID:22209804

Hirano, Seishiro; Fujitani, Yuji; Furuyama, Akiko; Kanno, Sanae

2011-12-20

75

A través de los ojos de Carl Marx: reseña de los escritos de Marx sobre América Latina en Alberto Fillipi  

Microsoft Academic Search

La historia de las instituciones latinoamericanas es compleja, densa y ambivalente. Italiano de nacimiento, pero venezolano por opción; el profesor Alberto Fillipi es considerado como uno de los principales estudiosos de las instituciones latinoamericanas en el mundo. En su obra, Las Instituciones e Ideologías en la Independencia Hispanoamericana, Fillipi recoge un conjunto de ensayos los cuales fueron escritos en diferentes

Maximiliano Korstanje

2007-01-01

76

Malaria eradication in Mexico: Some historico-parasitological views oncold war, deadly fevers by Marcos Cueto, Ph.D  

PubMed Central

This review of Professor Marcos Cueto's Cold War Deadly Fevers: Malaria Eradication in Mexico, 1955–1975 discusses some of the historical, sociological, political and parasitological topics included in Dr. Cueto's superbly well-informed volume. The reviewer, a parasitologist, follows the trail illuminated by Dr. Cueto through the foundations of the malaria eradication campaign; the release in Mexico of the first postage stamp in the world dedicated to malaria control; epidemiological facts on malarial morbidity and mortality in Mexico when the campaign began; the emergence of problem areas that impeded eradication; considerations on mosquitoes and malaria transmission in Mexico; the role of business and society in malaria eradication; the results of the campaign; the relationship between malaria and poverty; and the parasitological lessons to be learned from the history of malaria eradication campaigns. Dr. Cueto's excellent and well-informed exploration of malaria – not merely as a disease but as a social, economic and human problem – makes this book required reading.

Malagon, Filiberto

2008-01-01

77

Aerosol Optical Thickness Measurements of the Skies of San Marcos and Seguin, Texas from 2003-2004  

NASA Astrophysics Data System (ADS)

The effects of aerosols on the global climate have been investigated by climatologists, environmental chemists, meteorologists and geographers for more than two decades. One of the key parameters in these studies is the optical thickness properties of various kinds of aerosols. Since the density, composition and optical properties of aerosols in a column through the atmosphere can change rapidly and unpredictably, careful measurements should be taken over a long period to recognize patterns that might be associated with urban, regional, and continental climatic changes. In this poster, we discuss preliminary results of Aerosol Optical Thickness measurements by two sun photometers at or near solar noon over a period of six months at San Marcos, Texas. We also compare our data with observations from researchers in neighboring cities. We will conclude by discussing the effects on our measurements of regional air pollution events.

Rahman, M. T.; Westerlund, J.; Henry, C.; Scheumate, J.; Mims, F.

2005-12-01

78

Educational Accomplishment Audit of the Bilingual Education Program. Harlandale Independent School District, San Marcos Independent School District, Southwest Texas State University, 1969-1970.  

ERIC Educational Resources Information Center

|The purpose of the audit report on the Bilingual Education Program (1969-70) of the Harlandale and San Marcos Independent School Districts is to give a critique on the quality of the project evaluation, to discuss the comparative findings of the project evaluation and the audit, and to confirm or question the need for program modifications…

Pryor, Guy C.

79

Evaluation Report of the Bilingual Education Program: Harlandale Independent School District; San Marcos Independent School District; Southwest Texas State University, 1970-1971.  

ERIC Educational Resources Information Center

|This bilingual education program involved (1) bilingual classes in grades 1 through 4 in 2 Texas school districts (Harlandale and San Marcos) and (2) Southwest Texas State University, which served as the agency for training senior student teachers for bilingual education. Predominantly Spanish-speaking students from low socioeconomic backgrounds…

Hughes, B. E.; Harrison, Helene W.

80

Final Educational Accomplishment Audit of the Bilingual Education Program. Harlandale Independent School District, San Marcos Independent School District, Southwest Texas State University, 1971-72.  

ERIC Educational Resources Information Center

|The final audit report (1971-72) on the Bilingual Education Program of the Harlandale and San Marcos Independent School Districts gives a critique on the quality of the project evaluation, discusses the comparative findings of the project evaluation and the audit, and confirms or questions the need for program modifications proposed in the…

Pryor, Guy C.

81

Educational Accomplishment Audit of the Bilingual Education Program. Harlandale Independent School District, San Marcos Independent School District, Southwest Texas State University, 1970-71.  

ERIC Educational Resources Information Center

|The audit report (1970-71) on the Bilingual Education Program of the Harlandale and San Marcos Independent School Districts gives a critique on the quality of the project evaluation, discusses the comparative findings of the project evaluation and the audit, and confirms or questions the need for program modifications proposed in the evaluation.…

Pryor, Guy C.

82

MARCO, a macrophage scavenger receptor highly expressed in rodents, mediates dalcetrapib-induced uptake of lipids by rat and mouse macrophages.  

PubMed

Dalcetrapib (RO4607381/JTT-705), an agent that targets cholesteryl ester transfer protein, is in development for prevention of cardiovascular events. In vitro studies were performed to identify receptors that mediate an off-target effect of dalcetrapib observed in preclinical models: increased lipid uptake into the lamina propria of the small intestine and into mesenteric lymph node macrophages. Uptake of oxidized low-density lipoprotein (LDL) cholesterol or dalcetrapib-treated chylomicrons was quantitated by triglyceride assay or fluorescent labeling in primary macrophages and the cell lines CHO, J774A.1 (mouse macrophages) and THP-1 (human macrophages). Quantitative reverse-transcriptase polymerase chain reaction and immunoblotting measured candidate receptor expression. Lectin-like oxidized LDL receptor (LOX-1) and scavenger receptor type AI (SR-AI) were excluded as candidate receptors based on lack of association between their expression and uptake of dalcetrapib-treated lipids. In J774A.1 cells, uptake of dalcetrapib-treated chylomicrons was increased by LPS and associated with expression of MAcrophage Receptor with COllagenous domain (MARCO). MARCO was expressed at very low levels in human macrophages and was not inducible by LPS. The MARCO receptor may account for the variable species susceptibility towards dalcetrapib-mediated chylomicron uptake by macrophages. PMID:20074633

Perez, Anne; Wright, Matthew B; Maugeais, Cyrille; Braendli-Baiocco, Annamaria; Okamoto, Hiroshi; Takahashi, Akemi; Singer, Thomas; Mueller, Lutz; Niesor, Eric J

2010-01-13

83

Study of the evening plasma drift vortex in the low-latitude ionosphere using San Marco electric field measurements  

NASA Astrophysics Data System (ADS)

San Marco D electric field measurements have been averaged in terms of the equivalent E×B plasma drifts for days near the 1988 autumn equinox. The observed plasma drifts provide a satellite-based composite in altitude and local time of the evening enhancements in the zonal and vertical drifts and the shear in the zonal drift. The satellite data reveal details of the postsunset plasma drift vortex, which have been studied in radar and chemical release experiments. The averaged drift data show a proportional relationship between the prereversal enhancement of the vertical drift and the zonal derivative of the zonal drift. This relationship suggests that the vertical drift enhancement is caused by a curl-free response to the rapid increase of the zonal drift, which in turn is tied to the F region zonal winds and the E region sunset. The data also show a curl-free drop-off in altitude of the vertical plasma drift above and below the peak drift at 450 km altitude during the prereversal enhancement. Comparisons of the averaged data with results of coupled ionosphere-electrodynamics models are used to examine the underlying causes of the evening plasma drifts. The evening plasma drift vortex is shown to be a single drift structure with a single source. The source of the evening drift vortex resides on the bottomside of the integrated F region, just as originally supposed by Rishbeth [1971]. This dominant single source, which is produced by the divergence of the wind-driven current of the F region, causes the evening enhancement of the eastward plasma drift, the shear in the eastward drift, and the prereversal enhancement of the vertical drift.

Eccles, J. Vincent; Maynard, Nelson; Wilson, Gordon

84

The Twentieth Campus. An Analysis of the California State University's Proposal To Establish a Full-Service Campus in the City of San Marcos in Northern San Diego County. Commission Report 89-2.  

ERIC Educational Resources Information Center

|The California State University's (CSU) proposal to convert its North County Center in San Marcos from a permanent upper division and off-campus graduate center to the 20th full-service campus of the system is analyzed. The evolution of the CSU plan for serving the residents of northern San Diego County is described, including development of this…

California State Postsecondary Education Commission, Sacramento.

85

Strategies, Programs and Projects 2008 of the Astrophysical Group "SPACE-Universidad Nacional Mayor De San Marcos, Peru" - Preparing for the IYA2009  

NASA Astrophysics Data System (ADS)

We present a review of our efforts to introduce astronomy as scientific career in Peru, showing how our astronomy outreach programs have been one of the most important keys to reach our national astronomical scientific goals, remarking the crucial role that the celebration of the IYA2009 must play, in order to promote PhD programmes in astronomy in developing countries. We show the importance of the creation of the Seminario Permanente de Astronomía y Ciencias Espaciales (SPACE) in the Universidad Nacional Mayor de San Marcos, as an academic scientific and cultural center in Peru, to support our 26 years-old "Astronomical Fridays” which are addressed to wide range of public, from schoolchildren to scientists. We also show how important was to rediscover our ancient astronomical cultural past of Incas in order to promote the construction of a Astronomical Center located near Cusco city over 4000 meters above sea level, which includes a tourist-educational observatory, a scientific optical observatory and a solar radio observatory.

Vera, Victor; Aguilar, M.; Huisacayna, J.

2008-05-01

86

Evidence of Localized and Anisotropic Irregularity Growth Associated With Equatorial Spread-F Plasma Depletions Observed by the San Marco Satellite Electric Field Instrument  

NASA Astrophysics Data System (ADS)

Irregularities in equatorial spread-F develop from a variety of plasma instabilities, for which the Rayleigh-Taylor mechanism is the most dominant at scales of tens of kilometers and longer. Shorter scale waves also contribute to the spectra, and develop from drift wave instabilities, turbulent cascades, and other processes. In situ observations permit in-depth understanding of both the evolving irregularity spectra and the instability processes at work. Important observable parameters include the vector spectral distributions, the local DC electric field, and the local plasma density and associated gradients. In situ electric field measurements provide detailed knowledge of both the irregularities and their wavevector directions since the wave electric field is parallel to the k-vector in an electrostatic wave. Although the San Marco data set is very limited in bandwidth, its measurements nonetheless contribute to our knowledge of spread-F irregularities. We present filter bank data that provide evidence for non-uniform short scale (10's of meter and shorter) wave growth associated with the walls of plasma depletions. In addition, by filtering the DC electric field components, we also show evidence of km-scale irregularities that are highly anisotropic and relate them to the driving DC electric fields within the depletion region. The results are used to help elucidate our current understanding of spread-F instabilities.

Pfaff, R. F.; Liebrecht, C.; Freudenreich, H.; Heelis, R.; Coley, R.

2004-05-01

87

Source areas of the Acapulco-San Marcos, Mexico earthquakes of 1962 (M 7.1; 7.0) and 1957 (M 7.7), as constrained by tsunami and uplift records  

Microsoft Academic Search

A reliable location of the rupture areas for the earthquake doublet of 11 May 1962 ( M 7.1) and 19 May, 1962 (M 7.0), and the earthquake of 1957 (M 7.8) in the Acapulco-San Marcos region is essential for the assessment of the width and location of the strongly-coupled patch along the plate interface and for the evaluation of possible

M. Ortiz; S. K. Singh; V. Kostoglodov; J. Pacheco

88

Stability and evolution of orbits around the binary asteroid 175706 (1996 FG3): Implications for the MarcoPolo-R mission  

NASA Astrophysics Data System (ADS)

In support of the MarcoPolo-R mission, we have carried out numerical simulations of spacecraft trajectories about the binary asteroid 175706 (1996 FG3) under the influence of solar radiation pressure. We study the effects of (1) the asteroid's mass, shape, and rotational parameters, (2) the secondary's mass, shape, and orbit parameters, (3) the spacecraft's mass, surface area, and reflectivity, and (4) the time of arrival, and therefore the relative position to the sun and planets. We have considered distance regimes between 5 and 20 km, the typical range for a detailed characterization of the asteroids - primary and secondary - with imaging systems, spectrometers and by laser altimetry. With solar radiation pressure and gravity forces of the small asteroid competing, orbits are found to be unstable, in general. However, limited orbital stability can be found in the so-called Self-Stabilized Terminator Orbits (SSTO), where initial orbits are circular, orbital planes are oriented approximately perpendicular to the solar radiation pressure, and where the orbital plane of the spacecraft is shifted slightly (between 0.2 and 1 km) from the asteroid in the direction away from the sun. Under the effect of radiation pressure, the vector perpendicular to the orbit plane is observed to follow the sun direction. Shape and rotation parameters of the asteroid as well as gravitational perturbations by the secondary (not to mention sun and planets) were found not to affect the results. Such stable orbits may be suited for long radio tracking runs, which will allow for studying the gravity field. As the effect of the solar radiation pressure depends on the spacecraft mass, shape, and albedo, good knowledge of the spacecraft model and persistent monitoring of the spacecraft orientation are required.

Hussmann, Hauke; Oberst, Jürgen; Wickhusen, Kai; Shi, Xian; Damme, Friedrich; Lüdicke, Fabian; Lupovka, Valery; Bauer, Sven

2012-09-01

89

The supplemental instruction program: Student perceptions of the learning environment and impact on student academic achievement in college science at California State University, San Marcos  

NASA Astrophysics Data System (ADS)

Higher education in science has been criticized and calls to increase student learning and persistence to degree has been recognized as a national problem by the Department of Education, the National Science Foundation, the National Research Council, and the National Academy of Sciences. One mode of academic assistance that may directly address this issue is the implementation of Supplemental Instruction (SI) in science courses. SI is a specific model of academic assistance designed to help students in historically difficult science classes master course content, thus increasing their academic achievement and retention. This study assessed the SI program at California State University, San Marcos, in supported science courses. Specifically, academic achievement based on final course grades were compared between SI participating and nonparticipating students, multiple affective factors were measured at the beginning and end of the semester, and students' perceptions of the classroom and SI session learning environments recorded. Overall, students who attended five or more SI sessions achieved higher final course grades. Students who chose to participate in SI had higher initial levels of responsibility and anxiety. Additionally, SI participants experienced a reduction in anxiety over the semester whereas nonparticipants experienced an increase in anxiety from beginning to the end of the semester. The learning environment of SI embodies higher levels of constructivist principles of active learning such as cooperation, cohesiveness, innovation, and personalization---with one exception for the physics course, which is a based on problem-based learning. Structural equation modeling of variables indicates that high self-efficacy at the end of the semester is directly related to high final course grades; this is mediated by cohesion in the classroom and the cooperation evidenced in SI sessions. These findings are elaborated by student descriptions of what happened in SI sessions and discussed given the theoretical frameworks of Bandura's concept of self-efficacy and learning environment activities that embody constructivist principles.

Hizer, Suzanne Elizabeth

90

Diagenetic resetting of Sm-Nd isotope systematics in Wilcox Group sandstones and shales, San Marcos Arch, south-central Texas  

SciTech Connect

Preliminary Sm-Nd analyses of sandstones and shales from the Wilcox Group (upper Paleocene-lower Eocene) suggest that the whole-rock Sm-Nd signature is changed by diagenesis. Samples are obtained from the San Marcos arch, south-central Texas, at depths ranging from outcrop to 15,000 ft. Samples from above the depth of intense illitization and feldspar reactions (about 10,000 ft) have whole-rock Nd model ages of about 1,500-1,400 Ma, whereas samples buried deeper than 13,000 ft have Nd model ages of about 1,700-1,500 Ma. The similar depositional age of all samples makes change in provenance an unlikely cause of the variation. Diagenetic modification is the only reasonable explanation for the observed differences. Sm and Nd reservoirs within the shale change considerably with progressive diagenesis. Outcrop samples contain subequal concentrations of Sm and Nd in the acid-soluble and silicate fractions. The acid-soluble reservoir in deeper samples contains progressively less Sm and Nd and higher Sm/Nd ratios. In all samples, the acid-soluble Nd is more radiogenic than the Nd in the corresponding silicate fraction; the difference between the two reservoirs increases with depth. Preferential loss of Nd relative to Sm in the silicate reservoir during diagenetic crystallization of illite and albite is the most likely explanation for the observed trend in Nd model age. These data imply that the earlier assumption that no fractionation takes place in the Sm-Nd system during diagenesis is incorrect.

Awwiller, D.N.; Mack, L.E. (Univ. of Texas, Austin (USA))

1989-09-01

91

Economía institucional y ciencia económica  

Microsoft Academic Search

This article presents a comparative analysis of the approaches of institutional economics and Walrasian economics. After reviewing the differences between both perspectives, it argues that institutional economics is an alternative, however incomplete, to general equilibrium economics. It compares the way both tendencies conceive the individual, knowledge, efficiency and the economic order, to point out the differences. Some methodological discussion derived

Jaime Lozano

1999-01-01

92

Proposed Construction of San Diego State University's North County Center. A Report to the Governor and Legislature in Response to a Request for Capital Funds from the California State University To Build a Permanent Off-Campus Center of San Diego State University in San Marcos. Commission Report 87-5.  

ERIC Educational Resources Information Center

|A proposal by the trustees of California State University to purchase a 350- to 400-acre site for a permanent upper-division and graduate off-campus center of San Diego State University in the city of San Marcos is considered. The proposal is evaluated in light of criteria contained in "Guidelines and Procedures for Review of New Campuses and…

California State Postsecondary Education Commission, Sacramento.

93

uvby photometry in NGC 7419 (Marco+, 2013)  

NASA Astrophysics Data System (ADS)

The open cluster NGC 7419 is known to contain five red supergiants and a very high number of Be stars. However, there are conflicting reports about its age and distance that prevent a useful comparison with other clusters. We intend to obtain more accurate parameters for NGC 7419, using techniques different from those of previous authors, so that it may be used as a calibrator for more obscured clusters. We obtained Stroemgren photometry of the open cluster NGC 7419, as well as classification spectroscopy of ~20 stars in the area. We then applied standard analysis and classification techniques. (3 data files).

Marco, A.; Negueruela, I.

2013-02-01

94

Liquid Architectures: Marcos Novak's Territory of Information  

Microsoft Academic Search

The contemporary idea for interaction has embraced new understandings of the content of experience and the structure of space. New electronic technologies and advanced digital media have separated realities from the realm of the body and transformed experiences into ubiquitous events. The architectural discourse, once largely a discourse of form and style, has overcome these limitations and encountered, in territories

Camile A. Silva

2006-01-01

95

Seminario Tecnico Regional Sobre Alternativas de Educacion Basica de Adultos en el Marco de la REDALF del Proyecto Principal de Educacion en America Latina y el Caribe (Colonia Tovar, Venezuela, 29 de Septiembre al 3 de Octubre, 1986). Documento Final. (Regional Seminar on Alternatives for Basic Adult Education in the REDALF Project for Education in Latin America and the Caribbean (Colonia Tovar, Venezuela, September 29-October 3, 1986). Final Document.)  

ERIC Educational Resources Information Center

|The final report of a conference concerning adult basic education de Adultos en el Marco de la REDALF del related to innovative projects in adult education in nine countries. A wide spectrum of issues related to adult basic education, curriculum, methodology, evaluation, and research are analyzed in the context of educational planning. Among the…

United Nations Educational, Scientific, and Cultural Organization, Santiago (Chile). Regional Office for Education in Latin America and the Caribbean.

96

Instituciones Financieras de Desarrollo (Development Finance Companies).  

National Technical Information Service (NTIS)

The financing of development finance companies (DFC's) has been the World Bank's major mechanism for assisting medium-scale productive enterprises in member countries. The report provides an historical perspective of DFC's, examines the current World Bank...

1976-01-01

97

Estimación del valor económico de la calidad del agua de un río mediante una doble aproximación: una aplicación de los principios económicos de la Directiva Marco del Agua  

Microsoft Academic Search

El principal objetivo de la Directiva Marco del Agua de la Unión Europea es logar un “buen estado†de las aguas europeas para el año 2015 mediante una combinación de diferentes medidas. En este estudio, dos métodos de preferencias declaradas, el método de valoración contingente y el método de ordenación contingente, han sido aplicados para obtener la valoración económica de

Salvador del Saz Salazar; Francesc Hernandez Sancho; Ramon Sala Garrido

2009-01-01

98

Micro Autonomous Robotic Ostraciiform (MARCO): Design and Fabrication  

Microsoft Academic Search

This paper presents the design and fabrication of a robotic ostraciiform. The robot's design is inspired by the highly stable and fairly maneuverable boxfish. Boxfish with its multiple fins can maneuver in confined spaces with a near zero turning radius and it has been found that its unusual boxy shape is responsible for a self correcting mechanism that makes its

Parasar Kodati; Jonathan Hinkle; Xinyan Deng

2007-01-01

99

Sinopse dos marcos em matéria de segurança alimentar na ...  

Center for Food Safety and Applied Nutrition (CFSAN)

... 1995 Seafood Hazard Analysis Critical Control Point (Ponto de controle crítico para análise de risco em frutos do mar, HACCP na sigla em inglês ... More results from www.fda.gov/food/guidanceregulation/fsma

100

A Murine Scavenger Receptor MARCO Recognizes Polystyrene Nanoparticles  

Microsoft Academic Search

Recent toxicological studies indicate that nanoparticles or ultrafine particles ( < 100 nm) are more toxic than fine particles ( < 2 mm) because of their greater surface area. It is well known that alveolar macrophages play an important role in the first defense against various environmental particles and microorgan- isms. This is accomplished by binding to a macrophage receptor

Sanae Kanno; Akiko Furuyama; Seishiro Hirano

2007-01-01

101

TRUE DIGITAL ORTHOPHOTO OF THE SAN MARCO BASILICA IN VENICE  

Microsoft Academic Search

The orthophoto is a powerful instrument of representation which combines radiometric and geometric properties. In architectural applications the orthophoto production cannot be performed by using the traditional orthophoto approach. True digital orthophoto is a new technique which uses several images and a complete DEM of the object in order to produce an orthogonal projection of complex objects. All the radiometric

Caterina Balletti; Francesco Guerra; Andrea Lingua; Fulvio Rinaudo

102

Latino Hillbilly: An Interview with Marcos McPeek Villatoro.  

ERIC Educational Resources Information Center

|Novelist and faculty member McPeek Villatoro, son of a Salvadoran mother and an Appalachian father, discusses his childhood in Tennessee and San Francisco, racism encountered for being Latino or Appalachian, embracing his Latino roots, similarities between Appalachian and rural Central American cultures, the importance of teachers raising…

Minick, Jim; McPeek Villatoro, Marcos

2001-01-01

103

Instituciones, recesiones y recuperación en las economías en transición  

Microsoft Academic Search

This article analyses the 1989-2005 economic growth in the transitional economies in Europe and Central Asia, and signals factors that help to explain the differences in outcome. An econometric analysis finds prominent indices of property rights, corruption, economic freedom, tax incidence and civil liberties as statistically insignificant in this regard. Statistically significant variables include the degree of ethnic fractionalization and

Geoffrey M. Hodgson

2006-01-01

104

A Retórica na Economia Institucional de Douglass North1  

Microsoft Academic Search

This paper analyses the rhetoric of Douglass North. After a brief discussion about the relevance of rhetorical studies for methodological purposes, we investigate the author's speech in Institutions, Institutional Change and Economic Performance (1990) in two stages. The first deals with the way in which North delivers his theory — the main focus here is in the way he \\

PAULO GALA

2003-01-01

105

Jordi Rello and Marcos I Restrepo (Eds): Sepsis: New Strategies for Management. 142 pp  

Microsoft Academic Search

Th is is a relatively short book, which, from the title, purports to cover new approaches to the management of sepsis. Many of the international team of authors (American, Spanish, and Australian) are well-established experts in this fi eld, and the book covers some important aspects. For example, the genetic basis of sepsis is discussed in Chapter 3 with special

Yasser Sakr; Jordi Rello

2011-01-01

106

The spandrels of San Marco and the Panglossian paradigm: a critique of the adaptationist programme.  

PubMed

An adaptationist programme has dominated evolutionary thought in England and the United States during the past 40 years. It is based on faith in the power of natural selection as an optimizing agent. It proceeds by breaking an oragnism into unitary 'traits' and proposing an adaptive story for each considered separately. Trade-offs among competing selective demands exert the only brake upon perfection; non-optimality is thereby rendered as a result of adaptation as well. We criticize this approach and attempt to reassert a competing notion (long popular in continental Europe) that organisms must be analysed as integrated wholes, with Baupläne so constrained by phyletic heritage, pathways of development and general architecture that the constraints themselves become more interesting and more important in delimiting pathways of change than the selective force that may mediate change when it occurs. We fault the adaptationist programme for its failure to distinguish current utility from reasons for origin (male tyrannosaurs may have used their diminutive front legs to titillate female partners, but this will not explain why they got so small); for its unwillingness to consider alternatives to adaptive stories; for its reliance upon plausibility alone as a criterion for accepting speculative tales; and for its failure to consider adequately such competing themes as random fixation of alleles, production of non-adaptive structures by developmental correlation with selected features (allometry, pleiotropy, material compensation, mechanically forced correlation), the separability of adaptation and selection, multiple adaptive peaks, and current utility as an epiphenomenon of non-adaptive structures. We support Darwin's own pluralistic approach to identifying the agents of evolutionary change. PMID:42062

Gould, S J; Lewontin, R C

1979-09-21

107

The Spandrels of San Marco and the Panglossian Paradigm: A Critique of the Adaptationist Programme  

Microsoft Academic Search

An adaptationist programme has dominated evolutionary thought in England and the United States during the past 40 years. It is based on faith in the power of natural selection as an optimizing agent. It proceeds by breaking an organism into unitary 'traits' and proposing an adaptive story for each considered separately. Trade-offs among competing selective demands exert the only brake

S. J. Gould; R. C. Lewontin

1979-01-01

108

Inkrinsic localization and mapping with 2 applications: diffusion mapping and marco polo localization  

Microsoft Academic Search

We investigate Intrinsic Localization and Mapping (ILM) for teams of mobile robots, a multi-robot variant of SLAM where the robots themselves are used as landmarks. We develop what is essentially a straightforward application of Bayesian estimation to the problem, and present two com- plimentary views on the associated optimization problem that provide insight into the problem and allows one to

Frank Dellaert; Fernando Alegre; Eric Beowulf Martinson

2003-01-01

109

Marco Polo: International Small Solar System Body Exploration Mission in 2010's  

Microsoft Academic Search

Since 2000, Japanese scientists and engineers have investigated new generation primitive body missions in the post-Hayabusa era in 2010's. Receiving the Minorbody Exploration Forum Final Report, ISAS established the nation-wide Small Body Exploration Working Group (SBE-WG) in 2004. After the successful exploration of the S-type NEO Itokawa by Hayabusa in 2005, the Hayabusa-2 concept emerged for a C-type asteroid sample

Hajime Yano

2008-01-01

110

MARCO Is the Major Binding Receptor for Unopsonized Particles and Bacteria on Human Alveolar Macrophages1  

Microsoft Academic Search

Alveolar macrophages (AMs) avidly bind and ingest inhaled environmental particles and bacteria. To identify the particle binding receptor(s) on human AMs, we used functional screening of anti-human AM hybridomas and isolated a mAb, PLK-1, which inhibits AM binding of unopsonized particles (e.g., TiO2, latex beads; 63 5 and 67 4% inhibition, respectively, measured by flow cytometry; n 11) and unopsonized

Mohamed S. Arredouani; Aiyappa Palecanda; Henry Koziel; Yuh-Ching Huang; Amy Imrich; Timothy H. Sulahian; Yao Yu Ning; Zhiping Yang; Timo Pikkarainen; Marko Sankala; Sara O. Vargas; Motohiro Takeya; Karl Tryggvason; Lester Kobzik

111

Chemical and biological processes in coquina of Castillo de San Marcos National Monument  

Microsoft Academic Search

Analyses of water flowing through coquina showed exclusion of atmospheric CO2 and supersaturation in respect to calcite and hydroxyapatite. Extensive populations growing on the walls and benefiting from\\u000a these nutrients included mainly blue-green algae, green algae and diatoms.

David G. Rands; Joseph S. Davis; Luis R. Arana

1984-01-01

112

Drag balance measurements in the San Marco D\\/L mission  

Microsoft Academic Search

After a brief discussion on the processing of the data and on their expected accuracy, the paper presents some results which are mostly describing the neutral density of the thermosphere in terms of dependence on local time and altitude. Although partial and preliminary, the data set allows the determination of the midnight density bulge shape in the altitude range of

C. Arduini; L. Broglio; U. Ponzi

1993-01-01

113

The Economic Role of a University in a Small Area: The San Marcos Case  

ERIC Educational Resources Information Center

|This paper analyzes the economic development of Hays County, Texas, the site of Southwest Texas State University and indicates the important effect of that university's growth on the county, which might otherwise have stagnated. (JH)|

And Others; Savage, V. Howard

1974-01-01

114

Expresiones urbanas públicas en Ciudad Juárez: El caso graffiti: perspectiva institucional vs percepción juvenil  

Microsoft Academic Search

The goal of this study is to describe the problematic one of the graffitti appear, by means of the comparison of the institutional perceptions of the Main directorate of Public Security, School of Social Improvement for Minors (court), educative authorities of the mean-superior level and the local mass media when conceiving the act like a crime, whereas the perceptions of

Castro Valles Alberto

115

LAS INSTITUCIONES CULTURALES Y SU ACCIONAR EN LAS TRADICIONES MUSICALES. VISTO DESDE UNA PERSPECTIVA SOCIOLÓGICA  

Microsoft Academic Search

En Cuba, la preservación del patrimonio intangible, es decir, de la cultura popular y tradicional, las tradiciones orales, musicales, danzarías, etc., tienen una gran importancia en la vida de nuestras comunidades, particularmente en las zonas rurales. Para una mejor comprensión de la problemática los estudios se centran en la labor de la institución cultural y sus influencias en el desarrollo

Jaime Tamayo Rodríguez; Eyedelkis Medina García; Raida Rodríguez Noa

2012-01-01

116

A?ˆO AFIRMATIVA E O COMBATE AO RACISMO INSTITUCIONAL NO BRASIL  

Microsoft Academic Search

AFFIRMATIVE ACTION AND THE FIGHT AGAINST INSTITUTIONAL RACISM IN BRAZIL. This article analyzes the debate on affirmative action in Brazil in the light of the bibliography about racism and the legal basis for equal opportunities. From this perspective, it challenges the critical visions to the implementation of reparatory policies, gathering evidence on the stateís participation in the legitimation of racial

VALTER ROBERTO SILV

117

PREFERENCIA DE ÁRBOLES FORRAJEROS POR CABRAS EN LA ZONA BAJA DE LOS ANDES VENEZOLANOS. Goats Preference of Fodder Tree in the Venezuelan Andes Low Zone  

Microsoft Academic Search

In order to know the preference of twelve fodder species (Chlo- rophora tinctoria, Morus alba, Pithecellobium pedicellare, Gliri- cidia sepium, Guazuma ulmifolia, Cordia alba, Trichantera gi- gantea, Tithonia diversifolia, Leucaena leucocephala, Moringa oleifera, Azadirachta indica and Samanea saman) a cafeteria trial was carried out in goats at Trujillo State, Venezuela. An ex- perimental square latin design with evaluation period of

Danny Eugenio García; María Gabriela Medina; Tyrone Clavero; Johny Humbría; Alfredo Baldizán; Carlos Domínguez

2008-01-01

118

Marco Polo-R Target Asteroid (175706) 1996 FG3: Possible Evidence for an Annual Thermal Wave  

NASA Astrophysics Data System (ADS)

Pre- and post-perihelion spectral measurements (0.8-2.5 µm) of 1996 FG3 show substantially different thermal fluxes. We may be detecting deep absorption and re-radiation of the annual thermal wave rather than just diurnal thermal flux balance.

Binzel, R. P.; Polishook, D.; DeMeo, F. E.; Emery, J. P.; Rivkin, A. S.

2012-03-01

119

Contextualizacion y "Expresiones Pragmaticas": "Che" como Senal de Marco (Contextualization and "Pragmatic Expressions": "Che" as Deictic Marker).  

ERIC Educational Resources Information Center

The pragmatic expressions of Argentine Spanish (e.g., "bueno, viste, no? mira") are defined as deictic signals. They are deictic because they indicate elements of the communicative situation: transitions between text segments, conversational roles, or the social relationship between participants. They also signal contextual suppositions and help…

Carranza, Isolda

120

UN MARCO TEÓRICO Y PEDAGÓGICO PARA LA UTILIZACIÓN DE MODELOS ANALÓGICOS EN LA E NSEÑANZA DE LAS CIE NCIAS NATURALES  

Microsoft Academic Search

In this research, we put forward the theoretical basis and didactic strategies that have been used: Research into Didactic Physics. The research results have been presented by means of a group of studies carried out in the last years concerning the use of the modelling in teaching Physics (1) . Research into the models of functional reasoning: conceptual models. Such

Lucrecia Ethel

121

Nouvelles espèces d'ostracodes du Coniacien-Santonien et Maastrichtien du Bassin d'Essaouira (Atlas Atlantique, Marco)  

Microsoft Academic Search

The study of the ostracodes collected in the Coniacian-Santonian and Maastrichtian sedimentary series from the Essaouira Basin (Atlantic Atlas, Morocco) allows us to recognize about twenty named species and a few in open nomenclature. Among these species, five are new and described in this work : Cytherelloidea tigignitensis n. sp., Haplocytheridea tninensis n. sp., Eucytherura aitabbesensis n. sp., Xestoleberis santoniensis

Bernard Andreu; Khaddouj Boutchich; Boumedien Chbani

1998-01-01

122

APPLICATION OF COMPUTER-AIDED TOMOGRAPHY (CAT) AS A POTENTIAL INDICATOR OF MARINE MARCO BENTHIC ACTIVITY ALONG POLLUTION GRADIENTS  

EPA Science Inventory

Sediment cores were imaged using a local hospital CAT scanner. These image data were transferred to a personal computer at our laboratory using specially developed software. Previously, we reported an inverse correlation (r2 = 0.98, P...

123

Recently discovered overthrusting northeast of Llano uplift along extension of San Marcos platform: new exploration frontier in central Texas  

SciTech Connect

TJB Resources recently completed gravity, magnetotelluric, and seismic geophysical surveys in San Saba and Mills Counties north of the Llano uplift, west of the Ouachita Disturbed belt. Significant results show overthrusting has occurred 60-70 mi west of the Ouachita Disturbed belt. Earliest thrusting could have occurred in the Silurian-Devonian from south or southeast. Faulting reoccurs during Pennsylvanian Ouachita thrusting and again in the Late Cretaceous. The primitive Llano uplift buttressed the allochthonous rocks moving north and west. Magnetotelluric and gravity data indicate the Llano uplift is a separate and distinct isolated remnant or terrain, with numerous igneous intrusions reaching to great depths. Associated with this thrusting is a major tectonic northwest-southeast lineament located parallel to the termination of the Cretaceous rocks, outcropping on the western edge of Mills and Lampasas Counties. This lineament is documented by east-west seismic lines displaying a 0.3-sec displacement and farther southwest a 1.1-sec displacement. Paleozoic fossils were found near the surface trace of the northwest-southwest lineament as observed on the east-west seismic line. This area was previously mapped as Cretaceous. Surface inspection found Paleozoic rocks containing crinoids, spirifers, and rugose corals, with beds dipping to 45/sup 0/, contrasted with the N2/sup 0/ regional dip surrounding the lineament area. Well-log correlations from Marble Falls to Ellenberger range from 350 to 600 ft from east to west near the Llano uplift. The 60 to 70-mi frontal edge of the thrusting provides potential hydrocarbon traps along a north to northeast trend from central Texas to Oklahoma.

McMurdie, D.S.; Bryan, J.G.; Gibson, M.; King, T.; Sill, W.

1986-05-01

124

Final Evaluation Report of the San Marcos Consolidated Independent School District's Bilingual Education Program, 1974-1975.  

ERIC Educational Resources Information Center

|The program is primarily designed to provide bilingual education for pupils, in grades K-6, with limited English-speaking ability. Due to parental requests, approximately 16 percent monolingual English-speakers have been accepted into the program. Of the 529 children enrolled in the program, 89 percent have Spanish surnames. Objectives for the…

Harrison, Helene W.

125

Final Evaluation Report of the San Marcos Consolidated Independent School District's Bilingual Education Program, 1975-1976.  

ERIC Educational Resources Information Center

|Comprised of 27 classrooms from grade levels 1-6, the program was primarily designed to provide bilingual education for pupils with limited English speaking ability. However, due to parental requests, almost 16% monolingual English-speakers were accepted into the program. Of the 717 pupils participating in the program 84.6% were Mexican American.…

Harrison, Helene W.

126

Aerosol Optical Thickness Measurements of the Skies of San Marcos and Seguin, Texas from 2003-2004  

Microsoft Academic Search

The effects of aerosols on the global climate have been investigated by climatologists, environmental chemists, meteorologists and geographers for more than two decades. One of the key parameters in these studies is the optical thickness properties of various kinds of aerosols. Since the density, composition and optical properties of aerosols in a column through the atmosphere can change rapidly and

M. T. Rahman; J. Westerlund; C. Henry; J. Scheumate; F. Mims

2005-01-01

127

Pujol y la construcción de un espacio catalán de comunicación interacciones entre instituciones políticas y empresas mediáticas (1980-2003)  

Microsoft Academic Search

This article analyses Jordi Pujol's effort to build up a 'Catalan communicative space', essentially inspired, from the beginning of the 80s, by the so-called 'Catalan School of Communication'. This theoretical influence has been critical (as well as infrequent in the field of social communication) to understand the interactions between the political and the media powers in Catalonia in the last

Daniel E. Jones

2007-01-01

128

The Asteroid Thermal Mapping Spectrometer: An Imaging Mid-IR Spectrometer for the Marco Polo NEO Sample Return Cosmic Vision Candidate Mission  

NASA Astrophysics Data System (ADS)

We describe the Asteroid Thermal Mapping Spectrometer (ATMS) instrument, a compact imaging mid-IR Fourier transform spectrometer currently being developed at the University of Oxford for NEO remote sensing applications.

Bowles, N. E.; Calcutt, S.; Reininger, F.; Green, S. F.; Mortimer, H.

2009-03-01

129

EMPRESAS Y ONG EN EL MARCO DE LA RESPONSABILIDAD SOCIAL DE LA EMPRESA: UN ANÁLISIS EMPÍRICO DE SU RELACIÓN EN LA ESFERA PRIVADA  

Microsoft Academic Search

This paper is the result of two observed phenomena: a) the increasing social demand for and concern about ethical corporate behaviour has lead to the development of the corporate social responsibility (CSR) discipline, and b) civil society organizations has rocketed in the last decade playing a vital role in that development. Therefore, the main goal of this work is to

AMPARO MERINO; CARMEN VALOR; Amparo Merino de Diego; Carmen Valor Martínez; CÓDIGO UNESCO

130

1989 IEEE Annual Conference on Nuclear and Space Radiation Effects, 26th, Marco Island, FL, July 25-29, 1989, Proceedings. Part 1  

NASA Astrophysics Data System (ADS)

Various papers on nuclear science are presented. The general topics addressed include: basic mechanics of radiation effects, dosimetry and energy-dependent effects, hardness assurance and testing techniques, spacecraft charging and space radiation effects, EMP/SGEMP/IEMP phenomena, device radiation effects and hardening, radiation effects on isolation technologies, IC radiation effects and hardening, and single-event phenomena.

Ochoa, Agustin, Jr.

1989-12-01

131

1989 IEEE Annual Conference on Nuclear and Space Radiation Effects, 26th, Marco Island, FL, July 25-29, 1989, Proceedings. Part 1  

Microsoft Academic Search

Various papers on nuclear science are presented. The general topics addressed include: basic mechanics of radiation effects, dosimetry and energy-dependent effects, hardness assurance and testing techniques, spacecraft charging and space radiation effects, EMP\\/SGEMP\\/IEMP phenomena, device radiation effects and hardening, radiation effects on isolation technologies, IC radiation effects and hardening, and single-event phenomena.

Agustin Ochoa Jr.

1989-01-01

132

Origin and Characteristics of Discahrge at San Marcos Springs Based on Hydrologic and Geochemical Data (2008-10), Bexar, Comal, and Hays Counties, Texas.  

National Technical Information Service (NTIS)

The Edwards aquifer in south-central Texas is a productive and important water resource. Several large springs issuing from the aquifer are major discharge points, popular locations for recreational activities, and habitat for threatened and endangered sp...

C. L. Crow M. Musgrove

2012-01-01

133

Consumo de zumos de frutas en el marco de una alimentación saludable: Documento de Postura del Comité Científico “5 al día”  

Microsoft Academic Search

This article is the adapted version of the publication standards of the Actividad Dietética journal in the Position Paper of the Scientific Committee “5 a day” with respect to the Consumption of fruit juices in the framework of a healthy diet. The position was approved at the Vth Scientific Committee Meeting held in Madrid on April 4th, 2009. The controversy

Manuel Moñino; Eduard Baladia; Andreu Palou; Giuseppe Russolillo; Iva Marques; Andreu Farran; Iciar Astiasarán; Juan Manuel Ballesteros; Alfredo Martínez; Jordi Salas-Salvadó; Isabel Polanco; Francesc Miret; Margarita Alonso; Joan Bonany; Lola Romero de Ávila; Jesús Campos; Jose Pérez; Antonio Agudo; Victoria Gilabert; Graciela García; Francisco Pérez; Nuria Martínez; Pilar Cervera; Maria Manera; Julio Basulto

2010-01-01

134

Pérdida de suelo, abonamiento y rendimiento de cultivo en un inceptisol de los Andes venezolanos Topsoil loss compost addition and crop yield in an inceptisol of the venezuelan Andes  

Microsoft Academic Search

In a soil (Humic Dystrudept) of the Venezuelan Andes was studied the effect of different levels of topsoil removal and the addition of organic amendment on the yield of a black bean crop (Phaseolus vulgaris L., var. Criolla San Juan). Twelve treatments were evaluated, in a randomized blocks experimental design, resulting from the combination of three levels of topsoil removal

Gilberto Ferrer; Roberto López

2004-01-01

135

Elevated H(2)O (2) production via overexpression of a chloroplastic Cu/ZnSOD gene of lily (Lilium oriental hybrid 'Marco Polo') triggers ethylene synthesis in transgenic potato.  

PubMed

Transgenic potato plants (SS2 and SS4) that overexpressed a chloroplastic copper/zinc superoxide dismutase lily gene were utilized as an H(2)O(2)-inducible system in order to study the role of H(2)O(2) as a signaling molecule in the biosynthesis of ethylene. SS2 and SS4 plants grown in vitro under sealed microenvironment (SME) conditions displayed anomalous phenotypes including reduction of stem elongation, radial stem growth, and promotion of root hair formation in the generated root, which were similar to ethylene-induced responses. In addition, SS4 plants showed severe vitrification in developing leaves and elevated ethylene production under SME conditions. After the ethylene action inhibitor AgNO(3), 1-aminocyclopropane-1-carboxylic acid (ACC) oxidase (ACO) inhibitor CoCl(2), and ACC synthase inhibitor L -aminoethoxyvinylglycine were added to the growth media, the anomalous phenotypes in SS4 plants reverted to their normal phenotype with a concurrent decrease in ethylene production. Northern blot analysis showed that ACO transcripts in SS4 plants were constantly at high levels under normal and SME conditions, indicating that a high level of H(2)O(2) in SS4 plants up-regulates ACO transcripts. Moreover, the direct treatment of H(2)O(2) in potato plants confirmed the elevated expression of the ACO gene. Taken together, these data suggest that the high concentration of H(2)O(2) in transgenic potato plants stimulates ethylene biosynthesis by activating ACO gene expression. PMID:18273621

Kim, Yoon-Sik; Kim, Hyun-Soon; Lee, Yong-Hwa; Kim, Mi-Sun; Oh, Hyun-Woo; Hahn, Kyu-Woong; Joung, Hyouk; Jeon, Jae-Heung

2008-02-14

136

Technology use and plant closure 1 The authors are jointly responsible for the work. However, Sections 1–3have been written by Massimo G. Colombo, and the remaining sections by Marco Delmastro. 1  

Microsoft Academic Search

This paper aims to contribute to the empirical literature on industrial demography. It analyzes a stratified sample of the Italian metalworking industry composed of 810 plants with more than 10 employees. It considers plant closure over the period 1989–1997. Probit type econometric models are estimated in order to provide evidence on the explanatory factors of the likelihood of closure with

Massimo G Colombo; Marco Delmastro

2001-01-01

137

Observance of the 20th Anniversary of the Higher Education Act. Hearing before the Subcommittee on Postsecondary Education of the Committee on Education and Labor. House of Representatives, Ninety-Ninth Congress, First Session (San Marcos, Texas).  

ERIC Educational Resources Information Center

|The purposes, accomplishments, and future of the Higher Education Act are considered in hearings of the U.S. House of Representatives. A brief history of the Higher Education Act over the 20 years since its inception in 1965 is traced, and the role of the federal government in higher education is addressed. The centerpiece of the legislation was…

Congress of the U.S., Washington, DC. House Committee on Education and Labor.

138

Institutional Entrepreneurship and Collective Identity: the emergence of the HIV\\/AIDS policy field in Brazil Empreendedorismo Institucional e Identidade Coletiva: a emergência do campo da política em HIV\\/AIDS no Brasil  

Microsoft Academic Search

This study seeks to qualify the action of social entrepreneurs looking at the collective identity as an important resource and a defining element of discursive strategies directed to promote changes. We understand institutional entrepreneurship as a collective action that is both means of and a resource to promote changes. We examined the emergence of the Brazilian HIV\\/ AIDS policy and

Patricia Mendonça; Mario Aquino Alves; Luiz Claudio Campos

140

Un Marco Abierto: Un Manual de Matematicas y Ciencas Utilizando Inteligencias Multiples Disenado para Estudiantes Bilingues de Educacion General y Especial (An Open Framework: A Math and Science Manual Utilizing Multiple Intelligences Designed for Bilingual Students in General and Special Education).  

ERIC Educational Resources Information Center

|This manual incorporates a Multiple Intelligences perspective into its presentation of themes and lesson ideas for Spanish-English bilingual elementary school students in grades 4-8 and is designed for both gifted and special education uses. Each unit includes practice activities, semantic maps to illustrate and help organize ideas as well as…

New York City Board of Education, Brooklyn, NY. Office of Bilingual Education.

141

Un Marco Abierto: Un Manual de Matematicas y Ciencas Utilizando Inteligencias Multiples Disenado para Estudiantes Bilingues de Educacion General y Especial (An Open Framework: A Math and Science Manual Utilizing Multiple Intelligences Designed for Bilingual Students in General and Special Education).  

ERIC Educational Resources Information Center

This manual incorporates a Multiple Intelligences perspective into its presentation of themes and lesson ideas for Spanish-English bilingual elementary school students in grades 4-8 and is designed for both gifted and special education uses. Each unit includes practice activities, semantic maps to illustrate and help organize ideas as well as…

New York City Board of Education, Brooklyn, NY. Office of Bilingual Education.

142

AVALIAÇÃO DE ASPECTOS POLÍTICO-INSTITUCIONAIS E ECONÔMICO- FINANCEIROS DO SETOR DE SANEAMENTO NO BRASIL COM VISTAS À DEFINIÇÃO DE ELEMENTOS PARA UM MODELO CONCEITUAL EVALUATION OF POLITICAL, INSTITUCIONAL, ECONOMIC AND FINANCIAL ASPECTS OF THE SANITARY SECTOR IN BRAZIL IN ORDER TO DEFINE ELEMENTS FOR A CONCEPTUAL MODEL  

Microsoft Academic Search

The main objective of this paper is the definition of water supply and sanitation determinant elements to be included in a conceptual model. Because political and institutional arrangements and economic and financial conditions of the water sector have a great influence on planning and actions implementation, those aspects were considered as elements to compose and construct parts of this model.

SÉRGIO R. AYRIMORAES SOARES; OSCAR DE M. CORDEIRO; RICARDO S. BERNARDES

143

e-Science initiatives in Venezuela  

Microsoft Academic Search

Within the context of the nascent e-Science in- frastructure in Venezuela, we describe several web- based scientific applications developed at the Cen- tro Nacional de C´ alculo Cient´ifico Universidad de Los Andes (CECALCULA), Merida, and at the Instituto Venezolano de Investigaciones Cient´ificas (IVIC), Caracas. The different strategies that have been followed for implementing quantum chemistry and atomic physics applications are

J. L. Chaves; G. Diaz; V. Hamar; R. Isea; F. Rojas; N. Ruiz; Rodrigo Torrens; Maylett Uzcategui; Julio Flórez-lópez; H. Hoeger; C. Mendoza; Luis A. Núñez

2007-01-01

144

The preliminary results of the measurements of environmental levels of 40K and 137Cs in Venezuela  

Microsoft Academic Search

The study of the beta-particle radioactivity in air and 90Sr in rainwater collected at Instituto Venezolano de Investigaciones Cientificas, IVIC, that began in 1959 in conjunction with the U.S. Atomic Energy Commission was discontinued in 1963. But after the Chernobyl nuclear power plant accident in the USSR, work on the radioactive contamination in Venezuela has been renewed. Initially the measurement

J. J. Labrecque; P. A. Rosales; O. Carias

1992-01-01

145

Letters to Doctors about Risks of Purchasing Medications from ...  

Center for Drug Evaluation (CDER)

... Suppliers - Georgia. -. Marco Ayulo, ONCOLOGY/HEMATOLOGY CARE CENTER (Waycross, GA) (6/28/2012) (PDF - 33KB); ... More results from www.fda.gov/drugs/drugsafety/drugintegrityandsupplychainsecurity

146

Role of macrophage receptor with collagenous structure in innate immune tolerance.  

PubMed

Macrophages play a key role in host defense against microbes, in part, through phagocytosis. Macrophage receptor with collagenous structure (MARCO) is a scavenger receptor on the cell surface of macrophages that mediates opsonin-independent phagocytosis. The goal of our study is to investigate the role of MARCO in LPS or lipotechoic acid-induced macrophage tolerance. Although it has been established that expression of MARCO and phagocytosis is increased in tolerant macrophages, the transcriptional regulation and biological role of MARCO in tolerant macrophages have not been investigated. In this study, we confirm that tolerized mouse bone marrow-derived macrophages (BMDM) selectively increase expression of MARCO (both transcript and cell surface receptor) and increase phagocytosis. We found that H3K4me3 dynamic modification of a promoter site of MARCO was increased in tolerized BMDM. Blocking methylation by treatment with 5-aza-2'-deoxycytidine resulted in reduced H3K4me3 binding in the promoter of MARCO, decreased expression of MARCO, and impaired phagocytosis in tolerized BMDM. However, 5-aza-2'-deoxycytidine had no effect on the inflammatory component of innate immune tolerance. In aggregate, we found that histone methylation was critical to MARCO expression and phagocytosis in tolerized macrophages, but did not affect the inflammatory component of innate immune tolerance. PMID:23667110

Jing, Jian; Yang, Ivana V; Hui, Lucy; Patel, Jay A; Evans, Christopher M; Prikeris, Rytis; Kobzik, Lester; O'Connor, Brian P; Schwartz, David A

2013-05-10

147

Modeling the consumer benefit in the optimal power flow 1 This paper is a revision and extension of two papers presented at the Hawaii International Conference on System Sciences, January 6–9, 1998, Kona, HI. (1) J.D. Weber, T.J. Overbye, C. DeMarco, `Inclusion of Price Dependent Load Models in the Optimal Power Flow,' Proc. 31st Hawaii International Conference on System Sciences, Kona, HI, January 6–9, 1998; (2) J.D. Weber, T.J. Overbye, P.W. Sauer, C. DeMarco, `A Simulation Based Approach to Pricing Reactive Power,' Proc. 31st Hawaii International Conference on System Sciences, Kona, HI, January 6–9, 1998. 1  

Microsoft Academic Search

The addition of a model of the consumer into the traditional optimal power flow (OPF) algorithm that minimizes supplier costs is investigated. The development of such a model is based on the solution of the OPF using an objective function for maximization of social welfare. A traditional OPF algorithm can be modified to solve the social welfare maximization problem by

James D. Weber; Thomas J. Overbye; Christopher L. DeMarco

1999-01-01

148

Influencia de los bancos y cajas como accionistas y acreedores en la manipulación contable de las empresas  

Microsoft Academic Search

En este trabajo utilizamos una base de datos formada por 13247 empresas españolas para el periodo 1996-2000 y estudiamos el efecto de la presencia de instituciones financieras –bien sea como accionista o como acreedor- en las practicas de manipulación de beneficios (earnings management) de las empresas. Encontramos que las instituciones financieras como accionistas estimulan las prácticas de manipulación contable en

Jordi Surroca; Josep A. Tribo

2007-01-01

149

Women in Physics in Perú  

Microsoft Academic Search

The numbers of women receiving undergraduate and master's degrees in physics from San Marcos National University and undergraduate physics degrees from San Luis Gonzaga National University in Perú are reported. The number of undergraduate degrees in physics has increased for women in San Marcos University, but not for women earning master's degrees. Why don't women complete their post-degree studies? Economics

María Luisa Cerón Loayza; Yezeña Huaypar Vásquez; Jorge Aurelio Bravo Cabrejos

2009-01-01

150

Comparing Training Success of Two Strains of Largemouth Bass  

Microsoft Academic Search

A study was conducted to determine if fingerlings of two strains of largemouth bass, Micropterus salmoides, differed significantly in acceptance of formulated feed. The San Marcos (Marion) and Inks Dam (northern) strains of largemouth bass were trained at the San Marcos National Fish Hatchery and Development Center to accept formulated feed, Biodiet, under similar conditions in a simulated production environment.

J. Holt Williamson

1983-01-01

151

Two Sides of the Same Coin: Reaching Nontraditional Students  

ERIC Educational Resources Information Center

|This paper presents interviews with Barbara Bonham, a Senior Researcher at the National Center for Developmental Education and a member of the faculty at the Kellogg Institute, Appalachian State University in Boone, North Carolina and Melanie Chu, the Outreach Librarian at Cal State San Marcos in San Marcos, California. In these interviews they…

Berg, Steven L.

2005-01-01

152

Análisis de las políticas públicas de comunicación o en las estrategias de comunicación de las instituciones públicas. Así como de los partidos políticos, que aunque formaciones privadas poseen un rol esencial en la formación de la opinión pública, en la manifestación de las demandas ciudadanas y en el reclutamiento de las élites políticas. * El papel de los medios de comunicación y sus consecuencias en la dinámica política. Siendo éste el principal motor de las investigaciones en comunicación política  

Microsoft Academic Search

The role of political communication in the formation and expression of public opinion has been expounded upon by numerous researchers. In the context of political communication, there are three entities involved: the authorities, the media, and society itself. The classic studies of political communication deal with diverse aspects: * Analysis of public political communication or of the communication strategy of

Antonio Castillo Esparcia

153

Bound states of the hydrogen atom in the presence of a magnetic monopole field and an Aharonov-Bohm potential  

NASA Astrophysics Data System (ADS)

In the present article we analyze the bound states of an electron in a Coulomb field when an Aharonov-Bohm field as well as a magnetic Dirac monopole are present. We solve, via separation of variables, the Schrödinger equation in spherical coordinates and we show how the hydrogen energy spectrum depends on the Aharonov-Bohm and the magnetic monopole strengths. The Klein-Gordon equation is also solved. Permanent address: Centro de Física, Instituto Venezolano de Investigaciones Científicas IVIC, Apartado 21827, Caracas 1020-A, Venezuela.

Villalba, Víctor M.

1994-10-01

154

Elementos para una reforma del sector público en el contexto de una economía de mercado  

Microsoft Academic Search

En este trabajo se propone un conjunto de elementos básicos que deben ser considerados para el diseño de cualquier estrategia de reforma del sector público en el Perú, abordando cuestiones de carácter económico, social, político y de organización institucional.

Claudio Herzka

1996-01-01

155

Salinity Variations and Chemical Compositions of Waters in the Frio Formation, Texas Gulf Coast. Annual Report.  

National Technical Information Service (NTIS)

Waters produced from sandstone reservoirs of the deep Frio Formation exhibit spatial variations in chemical composition that roughly coincide with the major tectonic elements (Houston and Rio Grande Embayments, San Marcos Arch) and corresponding depositio...

R. A. Morton C. M. Garrett J. S. Posey J. H. Han L. A. Jirik

1981-01-01

156

ALIMENTOS  

Center for Food Safety and Applied Nutrition (CFSAN)

Text Version... El % de VD le ofrece un marco de referencia para decidir si un alimento contiene una cantidad alta o baja de un nutriente. ... More results from www.fda.gov/downloads/food/ingredientspackaginglabeling

157

Scavenger Receptors and Resistance to Inhaled Allergens.  

National Technical Information Service (NTIS)

After OVA sensitization and aerosol challenge, SR-AI/II and MARCO- deficient mice exhibited greater eosinophilic airway inflammation and airway hyper responsiveness compared to wild-type mice. A role for simple SRA-mediated antigen clearance (scavenging) ...

L. Kobzik

2007-01-01

158

Scavenger Receptors and Resistance to Inhaled Allergens.  

National Technical Information Service (NTIS)

After OVA sensitization and aerosol challenge, SR-AI/II and MARCO-deficient mice exhibited greater eosinophilic airway inflammation and airway hyperresponsiveness compared to wild-type mice. A role for simple SRA-mediated antigen clearance ('scavenging') ...

L. Kobzik

2008-01-01

159

1/17/2013 Doctor or Clinic Name Address City State ...  

Center for Drug Evaluation (CDER)

Text Version... Beightol, Neal 971 North Collier Boulevard Marco Island FL Bethel, Adrian ... Dolezal, Rudolph 125 E Lake Cook Rd # 209 Buffalo Grove IL ... More results from www.fda.gov/downloads/drugs/drugsafety

160

77 FR 69781 - Enhanced Natural Gas Market Transparency  

Federal Register 2010, 2011, 2012, 2013

...Jamie.Marcos@ferc.gov. Kamaria Martin (Technical Information), Office of Enforcement...20426, (202) 502-8015, Kamaria.Martin@ferc.gov. Issued November 15, 2012...sales and transportation by NGA section 1(c)-(d) entities.\\29\\ Thus, the...

2012-11-21

161

1. Historic American Buildings Survey, Louis C. Page, Jr., Photographer ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. Historic American Buildings Survey, Louis C. Page, Jr., Photographer January 20, 1934 VIEW FROM SOUTH (FRONT). - French Legation to Republic of Texas, Seventh & San Marcos Streets, Austin, Travis County, TX

162

Assistant in Bilingual Education: A Model for a Paraprofessional Curriculum  

ERIC Educational Resources Information Center

|Discusses in a general way the variations in bilingual education programs and explores the roles program assistants can play. Describes the curriculum developed at Palomar College in San Marcos, California, to prepare assistants in bilingual education. (PMP)|

Zevin, Patricia E.

1975-01-01

163

5. Historic American Buildings Survey, Louis C. Page, Jr., Photographer ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. Historic American Buildings Survey, Louis C. Page, Jr., Photographer April 4, 1934 RECENT ADDITION FROM EAST. - French Legation to Republic of Texas, Seventh & San Marcos Streets, Austin, Travis County, TX

164

35. OUTER DRAWBRIDGE, ENTRY TO THE PROTECTIVE CORRIDOR BETWEEN THE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

35. OUTER DRAWBRIDGE, ENTRY TO THE PROTECTIVE CORRIDOR BETWEEN THE RAVELIN AND THE CASTILLO, AS SEEN FROM WITHIN THE CORRIDOR - Castillo de San Marcos, 1 Castillo Drive, Saint Augustine, St. Johns County, FL

165

17. SOUTHEAST BASTION, SEEN FROM THE SOUTHEAST CORNER, SHOWING CANNON ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

17. SOUTHEAST BASTION, SEEN FROM THE SOUTHEAST CORNER, SHOWING CANNON EMPLACEMENT AND ECHAUGETTE, AND VIEW TO HOT SHOT OVEN - Castillo de San Marcos, 1 Castillo Drive, Saint Augustine, St. Johns County, FL

166

3. Historic American Buildings Survey, Louis C. Page, Jr., Photographer ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. Historic American Buildings Survey, Louis C. Page, Jr., Photographer February 10, 1934 VIEW FROM SOUTH (FRONT). - French Legation to Republic of Texas, Seventh & San Marcos Streets, Austin, Travis County, TX

167

2. Historic American Buildings Survey, Louis C. Page, Jr., Photographer ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. Historic American Buildings Survey, Louis C. Page, Jr., Photographer January 20, 1934 VIEW FROM WEST (FRONT). - French Legation to Republic of Texas, Seventh & San Marcos Streets, Austin, Travis County, TX

168

40. Photocopy of plan of the Castillo c. 1779 (Actual ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

40. Photocopy of plan of the Castillo c. 1779 (Actual Negative 4'x5') STAR PLAN, COURTYARD FACADE PROFILE AND DEFENSIVE LINKS - Castillo de San Marcos, 1 Castillo Drive, Saint Augustine, St. Johns County, FL

169

4. Historic American Buildings Survey, Louis C. Page, Jr., Photographer ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. Historic American Buildings Survey, Louis C. Page, Jr., Photographer January 20, 1934 VIEW FROM SOUTHWEST (FRONT). - French Legation to Republic of Texas, Seventh & San Marcos Streets, Austin, Travis County, TX

170

Attitudes and Views of Medical Students toward Science and Pseudoscience  

Microsoft Academic Search

San Marcos National University. Lima-Peru. Abstract: Objectives: To know opinions, attitudes and interest of medical students toward science and pseudoscience. Design: A questionnaire was administered to 124 medical students of the San Marcos University in Lima, Peru. Results: 173 students were surveyed. The response rate was 72%. Eighty-three percent (100\\/121) of respondents said that science is the best source of

Adolfo Peña; Ofelia Paco

2004-01-01

171

Women in Physics in Peru´  

Microsoft Academic Search

The numbers of women receiving undergraduate and master’s degrees in physics from San Marcos National University and undergraduate physics degrees from San Luis Gonzaga National University in Peru´ are reported. The number of undergraduate degrees in physics has increased for women in San Marcos University, but not for women earning master’s degrees. Why don’t women complete their post-degree studies? Economics

Mari´a Luisa Cero´n Loayza; Jorge Aurelio Bravo Cabrejos

2009-01-01

172

OKUL ÖNCESE ?? TM KURUMLARINDAK ? Ö ?RETMENLERN ÇEVRE BLNC ? DÜZEYLERNN VE BU OKULLARDAK ? ÇEVRE E ?? TMNN DURUMUNUN BELRLENMES ? IDENTIFICATION OF THE LEVEL OF ENVIRONMENTAL AWARENESS OF KINDER-GARDEN TEACHERS' IN PRE-SCHOOL EDUCATION INSTITUTIONS AND THE SITUATION OF ENVIRONMENTAL EDUCATION IN THESE SCHOOLS L'IDENTIFICATION DU NIVEAU DE CONSCIENCE ECOLOGIQUE D'ENSEIGNANTS DE GENTIL JARDIN' DANS LES INSTITUTIONS D'EDUCATION PRESCOLAIRES ET LA SITUATION D'EDUCATION ECOLOGIQUE DANS CES ECOLES IDENTIFICACION DEL NIVEL DE el CONOCIMIENTO AMBIENTAL DE MAESTROS de JARDIN más AMABLE' EN INSTITUCIONES PREESCOLARES de EDUCACION Y LA SITUACION DE la EDUCACION AMBIENTAL EN ESTAS ESCUELAS  

Microsoft Academic Search

ÖZET: Bu çalõ?mada, okul öncesi eitim kurumlarõnda ö ?retmen olarak çalõ?an personelin çevre bilinci düzeyleri ele alõnmõ?tõr. Çevreyi korumaya yönelik bilgilerinde, tutumlarõnda ve davranõ?larõnda görülen eksikliklerinin kaynaklarõ aratõrõlmõ? ve bu eksikliklerin nasõl giderilecei ortaya konmutur. Çalõ?mada veri toplama aracõ olarak tutum, bilgi ve davranõ? ölçei kullanõlmõ?tõr. Çalõ?manõn örneklemini farklõ anaokullarõnda görev yapan 145 ö ?retmen oluturmutur. Ayrõca okul öncesi eitim

Sinan ERTEN; Põnar ÖZDEMR; Tülin GÜLER

173

Abortion in Latin America is a matter of desperation.  

PubMed

For North Americans, the abortion debate is one of rights: the fetus' right to be born versus the mother's right to control her body. But for Latin American women, debating rights is a luxury that has little to do with the brutal reality of becoming pregnant and knowing it will be impossible to feed yet another child, says Sylvia Marcos. A Mexican psychotherapist who has taught at Harvard University, Marcos works with women in squatters' camps throughout Mexico. "If you want to end abortion in Latin America, you will have to change the whole economic system," said Marcos in an interview. Unfortunately, Marcos said, abortion foes have failed to come up with answers to the poverty that drives Latin American women to have what she estimates are 12 million illegal abortions a year. Women in Latin America, most of them Catholic, are expected to marry young and have many children. Most women choose abortion only after having many children and deciding it would be impossible to feed another, Marcos said. The combination of Catholicism and culture--extolling the virtues of large families--and women's utter lack of means to provide is devastating psychologically and physically, she said. Furthermore, about 1/2 of all Latin American women are raising children alone. "It's so unjust," said Marcos. The 12 million abortions reflect desperation--not an anti-life orientation, she said. "When you are hungry, you do not debate the ethics of when life begins," said Marcos. "If we had enough to eat, then we could care." Women who have abortions continue to call themselves Catholic but often quit going to communion. "Not only do they have a hard time recovering physically from illegal abortions, but they are denied spiritual enjoyment," Marcos said. Trapped in desperate situations, women ignore church teachings about abortion--particularly if they are Indians who still identify strongly with traditions that uphold different ideas about when life begins. Both prochoice and prolife forces in North America, said Marcos, have tended to look at the abortion issue from a North American perspective and have not formed a broader analysis that takes into account the concrete realities of poor women--the majority in Latin America. "It's very American to start with an abstract moral principle," she said. PMID:12178836

Martinez, D

174

Huperzine A.  

PubMed

Huperzine A, an alkaloid isolated from Huperzia serrata, is a putative nootropic agent developed by the Chinese Academy of Sciences. Huperzine A is currently in phase III trials in China for the treatment of patients with Alzheimer's disease. The mechanism of action of huperzine A is suggested to be facilitated through the slow reversible inhibition of acetylcholinesterase. Marco Hi-Tech Joint Venture has exclusive worldwide marketing and distribution rights to huperzine A. Marco Hi-Tech Joint Venture is a corporation principally owned by Hi-Tech Pharmacal and Marco International, a global trading and finance firm formed to import huperzine A from China. Marco Hi-Tech Joint Venture also has rights to synthetic analogues of huperzine A. In July 2003, Savient Pharmaceuticals acquired the exclusive rights from Marco Hi-Tech to market huperzine A in Europe and the US. Clinical trials of huperzine A in elderly patients with age-associated memory loss are underway in the US, and a phase II study funded by an NCI grant is being planned. PMID:14725492

2004-01-01

175

Mini-shelves in Taylor shale: stratigraphy of Late Cretaceous and early Tertiary units, Bastrop County, Texas  

SciTech Connect

Several well-log cross sections and isopach maps demonstrate the spatial relationships among the Late Cretaceous and early Tertiary stratigraphic units in Bastrop County, Texas. Each of the major structural features that are present partially within the county - the San Marcos arch, Round Rock syncline, East Texas basin, Mexia-Talco and Luling fault systems, and Travis volcanic field - has influenced the units investigated. Most of the stratigraphic units follow normal stratigraphic patterns (i.e., they thin toward the outcrop and toward the San Marcos arch). There are some notable exceptions, however. These exceptions are discussed.

Tucker, D.R.; Hencey, D.

1987-09-01

176

Women in Physics in Perú  

NASA Astrophysics Data System (ADS)

The numbers of women receiving undergraduate and master's degrees in physics from San Marcos National University and undergraduate physics degrees from San Luis Gonzaga National University in Perú are reported. The number of undergraduate degrees in physics has increased for women in San Marcos University, but not for women earning master's degrees. Why don't women complete their post-degree studies? Economics and gender stereotypes are factors that women in Perú have to fight each day. Perú does not have a good scholar program in science, so few students are interested in beginning their university careers in science. Improvements in science education are needed for our country to reach its potential.

Loayza, María Luisa Cerón; Vásquez, Yezeña Huaypar; Cabrejos, Jorge Aurelio Bravo

2009-04-01

177

Platform to supports learning based on Social Network, Web Intelligence and CSCL  

Microsoft Academic Search

This paper presents a Collaborative Learning Platform (we have denominated in spanish Red Acade¿mica Colaborativa Institucional -RACI), which is based on methodologies used in Social Network, Web Intelligence, and CSCL (Computer Supported Collaborative Learning). These three areas are based on carry out group work to achieve a common task or goal by means of an interface to a shared environment.

Mario Anzures-García; Luz A. Sánchez-Gálvez; Elizabeth López-Meléndez; Gilberto Andrade-Andrade; Ricardo Rivera-Morales

2010-01-01

178

GALLARDO CASTILLO, M.J., Materiales ECTS de Derecho Administrativo (Casos prácticos con soluciones. Adaptado al EEES)  

Microsoft Academic Search

El Espacio Europeo de Educación Superior supone un desafío para el profesorado y los estudiantes; en este contexto de cambio, la obra de la profesora Gallardo Castillo se convierte en un manual de referencia para esta doble faceta de enseñanza y aprendizaje. El desarrollo de los conceptos e instituciones básicas del Derecho Administrativo queda ampliamente reflejado en cada uno de

2011-01-01

179

CARACTERÍSTICAS DE LA POLÍTICA CRIMINAL ADOPTADA POR CUBA EN RELACIÓN AL TRÁFICO Y USO DE LA DROGA, PSICOFÁRMACOS Y OTRAS SUSTANCIAS DE EFECTOS SIMILARES  

Microsoft Academic Search

La droga, psicofármacos y otras sustancias de similares efectos, han ido evolucionando a lo largo de la historia con sus características específicas, de acuerdo a las condiciones de la sociedad, pero en Cuba, este flagelo ha sido atendido y controlado especialmente por las diferentes instituciones de nuestro Estado, debido a las graves consecuencias que acarrea para la población, específicamente para

Yaniuska Pose Roselló

2011-01-01

180

Investigaciones de Economía de la Educación 6  

Microsoft Academic Search

El artículo analiza las tendencias globales y particulares de los aranceles en las distintas carreras e instituciones universitarias chilenas. El sistema de educación superior en Chile es complejo y diverso, no sólo por las actividades realizadas por las universidades (docencia, investigación y extensión), sino también por la estructura de precios (aranceles) que cada una de ellas cobra a sus estudiantes.

Vìctor Salas Opazo

181

España, entre Europa y América: un ensayo interpretativo  

Microsoft Academic Search

Este último artículo del dossier presenta algunas hipótesis de interpretación sobre la historia de la política exterior española durante el siglo xx.Los elementos centrales son la relación entre España y el resto de los Estados continentales; la imagen de las instituciones europeas; los sentimientos encontrados hacia Estados Unidos, su política y su sociedad; y las cambiantes percepciones, estrategias e intereses

Florentino Portero

2003-01-01

182

Cambios institucionales en México y América Latina  

Microsoft Academic Search

( 5 ) La emergencia económica se debe a la política institucional, tal como lo ha mostrado la experiencia reciente de diversos países. En estos se conjugó la buena gobernanza pública con el desarrollo de la competitividad estructural para lograr una transformación produc- tiva tanto del sector público como del privado. Por otra parte, América Latina está en una situación

Fernando Jeannot

183

La economía política de reformas institucionales en Bolivia  

Microsoft Academic Search

En este estudio analizamos el caso boliviano de reformas institucionales durante el periodo 1993-1997. Centramos la atención sobre tres reformas en particular: la Reforma de Participación Popular, la Reforma Educativa y la Reforma del Sistema de Pensiones. Cada una ejemplifica características singulares de cambio institucional tanto por el proceso como por los resultados de la adopción. La Participación Popular constituye

George Gray-Molina; Ernesto Perez de Rada; Ernesto Yáñez

1999-01-01

184

Las habilidades comunicativas en estudiantes de la especialidad contabilidad y finanzas: una propuesta de actuación  

Microsoft Academic Search

Las instituciones universitarias están llamadas a formar profesionales que darán continuidad a la obra social que construimos. La imagen del mismo lleva implícita el dominio de una serie de cualidades que le permitan expresarse correctamente. Un reciente estudio realizado a futuros graduados de quinto año en la especialidad Contabilidad y Finanzas del Centro Universitario Municipal de Lajas acerca del desarrollo

Daylin Yera Jacomino

2011-01-01

185

DERECHO E INNOVACIÓN METODOLÓGICA PARA LA ADQUISICIÓN DE LAS COMPETENCIAS Y HABILIDADES EN EL TITULO DE GRADO EN TRABAJO SOCIAL  

Microsoft Academic Search

El artículo presenta, en primer lugar, la estrecha relación entre el Derecho y el Trabajo Social y, en segundo lugar, la metodología innovadora en la docencia de las prácticas curriculares del Titulo de Grado de Trabajo Social de la Universidad de Murcia que aglutina la cooperación docente, profesional e institucional. El objetivo del Titulo es formar profesionales preparados para desarrollar

Enrique Pastor Seller

2011-01-01

186

La evaluación como proceso de legitimidad: la opinión de los alumnos. Reporte de una experiencia  

Microsoft Academic Search

En este trabajo se presentan diversas consideraciones sobre la importancia de legitimar la operación social y la gestión institucional en las organizaciones educativas, considerando que uno de los elementos estriba en el derecho a opinar de los alumnos sobre el desempeño docente de sus profesores. En el trabajo se reporta el análisis de 26 010 cuestionarios contestados por los alumnos

FELIPE TIRADO SEGURA; ALEJANDRO MIRANDA DÍAZ; Y ANDRÉS SÁNCHEZ MOGUEL

2007-01-01

187

Gender, nation and the politics of dress in 20th century Philippines  

Microsoft Academic Search

he iconography of the People Power 1 Revolution in 1986 was dominated by the images of two powerful women: First Lady Imelda Marcos, resplendent in her terno (national dress with butterfly sleeves), and opposition presidential candidate Corazon Aquino, the widow in yellow. The contrast between the elegant First Lady in the national dress she had popularised and the housewife in

Mina Roces

188

Magnetic Susceptibility Meter for Planetary Regolith Composition Studies (MSM)  

NASA Astrophysics Data System (ADS)

MSM instrument is designed for in situ regolith composition studies and for detection of space weathering products. MSM is currently under a one-year assessment study for the MarcoPolo-R asteroid explorer (ESA) and has been proposed for the Lunar Lander (ESA).

Kohout, T.; Britt, D.; Cuda, J.; MSM Team

2012-10-01

189

Software Engineering in Asia: A Report on the International Conference on Software Engineering (10th), April 11-16, 1988, Singapore: (Foreign Trip Report).  

National Technical Information Service (NTIS)

The complete trip report describes my impressions of the 10th International Conference on Software Engineering held in Singapore in April, 1988. I attended Tom DeMarco's and Tim Lister's tutorial on Software Productivity: The Human Side, Barry Boehm's tut...

L. Zucconi

1988-01-01

190

Competencia estratégica en la distribución minorista de combustibles de automoción  

Microsoft Academic Search

Este trabajo presenta un estudio sobre el proceso de formación de precios en el mercado de carburantes y combustibles de automoción dentro del sector petrolífero español, en el marco de las relaciones verticales entre empresas. La competencia en precios en el mercado verticalmente diferenciado se modeliza como un juego en dos etapas en el que, en primer lugar, la refinería

Alejandro Bello Pintado; Sandra Cavero Brújula

2007-01-01

191

¿Los consumidores colombianos de combustibles reciben subsidios o, en neto, pagan impuestos?  

Microsoft Academic Search

El objetivo del documento es analizar los subsidios e impuestos al consumo de combustibles en Colombia y verificar si los primeros han sido mayores que los segundos. El marco conceptual es un modelo simple de equilibrio parcial donde existen sólo dos agentes: el sector público (paga subsidios y cobra impuestos) y el consumidor de combustibles (recibe subsidios y paga impuestos).

Hernán Rincón

2008-01-01

192

LA IDEA DE CONVERGENCIA TECNOCIENTÍFICA: ECONOMICISMO VERSUS AXIOLOGÍA.1  

Microsoft Academic Search

La idea de convergencia es una de las nociones más difundidas en el lenguaje tecnocientífico actual. Sin olvidar el éxito que está teniendo en el diseño de la política europea, no cabe duda de que es un concepto clave en la financiación de las investigaciones integradas en el marco de lo que se ha denominado las NBCI ( nano-bio-cogno-info- tecnologías).

María José Miranda Suárez

193

Palladio and the Water-oriented Scenography of Venice  

Microsoft Academic Search

Andrea Palladio’s Venetian churches of San Giorgio Maggiore and Il Redentore overlook the Bay of San Marco and its tributaries, the Grand Canal and the Giudecca Canal. In Palladio and the Water-oriented Scenography of Venice, Daniel Savoy examines the churches from their surrounding waterways, explaining them as centerpieces in an elaborate program of urban scenography that must be seen as

Daniel Savoy

2012-01-01

194

¿CIENCIA DEL TURISMO O CÍNICO PASATIEMPO ACADÉMICO?  

Microsoft Academic Search

Los términos y las palabras son funcionales a la vida social, permiten que los hombres puedan compartir marcos de referencia en forma coherente. Sin embargo, en ocasiones la permeabilidad o el uso ideológico de los mismos llevan a confusiones o a callejones sin salida. El siguiente artículo crítico ha sido escrito por medio de diferentes trabajos realizados durante 4 años

Maximiliano Korstanje; Francisco Muñoz de Escalona

2011-01-01

195

Lower Thoracic Spinal Cord Stimulation to Restore Cough in Patients With Spinal Cord Injury: Results of a National Institutes of Health–Sponsored Clinical Trial. Part II: Clinical Outcomes  

Microsoft Academic Search

DiMarco AF, Kowalski KE, Geertman RT, Hromyak DR, Frost FS, Creasey GH, Nemunaitis GA. Lower thoracic spinal cord stimulation to restore cough in patients with spinal cord injury: results of a National Institutes of Health–sponsored clinical trial. Part II: clinical outcomes.

Anthony F. DiMarco; Krzysztof E. Kowalski; Robert T. Geertman; Dana R. Hromyak; Fredrick S. Frost; Graham H. Creasey; Gregory A. Nemunaitis

2009-01-01

196

Lower Thoracic Spinal Cord Stimulation to Restore Cough in Patients With Spinal Cord Injury: Results of a National Institutes of Health–Sponsored Clinical Trial. Part I: Methodology and Effectiveness of Expiratory Muscle Activation  

Microsoft Academic Search

DiMarco AF, Kowalski KE, Geertman RT, Hromyak DR. Lower thoracic spinal cord stimulation to restore cough in patients with spinal cord injury: results of a National Institutes of Health–sponsored clinical trial. Part I: methodology and effectiveness of expiratory muscle activation.

Anthony F. DiMarco; Krzysztof E. Kowalski; Robert T. Geertman; Dana R. Hromyak

2009-01-01

197

Bilingualism and Bilingual Education in a Complex Context  

ERIC Educational Resources Information Center

This article is based on results from a baseline study for an intended intervention project in bilingual-intercultural education in the Municipality of San Miguel Ixtahuacan, in the Department of San Marcos, Guatemala. To a great extent the article deals with issues of bilingual education from the perspective of social justice. It analyses the…

Herrera, Lazaro Moreno; Wedin, Asa

2010-01-01

198

Neurotoxic effects of thimerosal at vaccines doses on the encephalon and development in 7 days-old hamsters  

Microsoft Academic Search

Objectives: To determine if thimerosal administration in amounts equivalent to vaccines content produces neurotoxic effects on the encephalon in postnatal hamsters and on experimentation animal's development. Design: Experimental, prospective, bioetapic study. Setting: San Fernando Faculty of Medicine, Universidad Nacional Mayor de San Marcos. Biological material: Seven days- old hamsters. Material: We divided 45 postnatal hamsters in three groups: group A

Jonny Laurente; Fany Remuzgo; Betthina Ávalos; Johnnie Chiquinta; Bladimir Ponce; Ronald Avendaño; Luis Maya

199

Detection of Salmonellae from Fish in a Natural River System  

Microsoft Academic Search

Sediment, water, and fish gut samples taken at three sites near the headwaters of the San Marcos River, Texas, were analyzed for salmonellae Salmonella spp. by culture and molecular techniques. While enrichment cultures from sediment and water samples from the two uppermost sites were negative for salmonellae in polymerase chain reaction analyses, both sediment and water samples were positive at

James Gaertner; Phil E. Wheeler; Shola Obafemi; Jessica Valdez; Michael R. J. Forstner; Timothy H. Bonner; Dittmar Hahn

2008-01-01

200

Invertir en integración: Los retornos de la complementariedad entre software y hardware  

Microsoft Academic Search

En el curso de la Tercera Reunión de los Ministros de Hacienda de América y el Caribe celebrada en Lima el 28 de mayo de 2010, los presentes deliberaron sobre cómo reducir las brechas de integración regional y coincidieron en que la agenda de integración requiere de inversiones simultáneas en software (políticas y marcos regulatorios) y en hardware (infraestructura física).

Antoni Estevadeordal; Paolo Giordano; Alexandre Rosa; Jordan Schwartz; Osvaldo Rosales; Ricardo Sánchez

2011-01-01

201

LA VAGINA DENTADA EN LA MITOLOGÍA DE MESOAMÉRICA: Itinerario analítico de orientación lévi-straussiana  

Microsoft Academic Search

THE VAGINA DENTATA IN THE MYTHOLOGY OF MESOAMERICA: Route guidance analytic Levi-Straussian Estas páginas presentan la síntesis de mis pesquisas sobre las manifestaciones del pensamiento mítico de los zoques de Chiapas (México), contextuadas en el marco de la cosmovisión mesoamericana. Evidencian la influencia ejercida por el pensamiento de Claude Lévi-Strauss sobre mis planteamientos, en particular referido al simbolismo de las

Félix Báez-Jorge

202

Ancient Media in Literature: Golden Printers and Golden Authors.  

ERIC Educational Resources Information Center

|Seal printing is explored as a literary topic in 28 works dating from the third millennium B.C. to A.D. 1613 (from Sumerian times through Shakespeare's). This ancient printing method is mentioned in the literature of the Egyptians, Greeks, Hebrews, and Arabians. It occurs in the works of Herodotus, Plutarch, and Marco Polo, as well as Chaucer and…

Mooradian, Karlen

203

Development of Automatic Techniques for Refugee Camps Monitoring using Very High Spatial Resolution (VHSR) Satellite Imagery  

Microsoft Academic Search

In the framework of the European project GMOSS (Global Monitoring for Security and Stability) the CRPSM (Centre di Ricerca Progetto San Marco) is developing automatic procedures for detecting and counting dwelling units in refugee camps. The possibility of monitoring refugee camps, using very high spatial resolution satellite (VHSR) images, has been already demonstrated, in the past, by several authors. This

G. Laneve; G. Santilli; I. Lingenfelder

2006-01-01

204

The Meek And Mighty Bride: Representations of Esther, Old Testament Queen of Persia, on Fifteenth Century Italian Marriage Furniture  

Microsoft Academic Search

Cassone and spalliere panels depicting the Old Testament Book of Esther were produced by a number of Florentine artists during the fifteenth century. The workshops of Jacopo Sellaio; Filippino Lippi and Marco del Buono Giamberti and Apollonio di Giovanni di Tomaso present Esther as a humble and virtuous queen. Their choice of scenes from the text and distinctive characterisation of

Anna Drummond; Mighty Bride

205

David Hurst Thomas and the Historical Archaeology of the Spanish Borderlands.  

ERIC Educational Resources Information Center

|Discusses David Hurst Thomas' archaeological work on the Spanish borderlands, which integrates field archaeology and documentary history. Focuses on locating and studying the Santa Catalina de Guale. Addresses his project on the Pueblo San Marcos that will further test his ideas about the Spanish mission period. (CMK)|

Snead, James E.

2000-01-01

206

TRATAMIENTO FISCAL DE LOS FACTORES DE RIESGO PARA LA SALUD Y DEL GASTO SANITARIO: REVISIÓN Y PROPUESTAS DE REFORMA  

Microsoft Academic Search

El presente trabajo revisa algunos de los aspectos más destacables de la fiscalidad sobre el consumo de bienes nocivos como instrumento de intervención vinculada a las políticas de salud y a la corrección del fallo de mercado. El objetivo no es otro que el de repasar el estado de conocimiento al respecto, destacando las variables que delimitan el marco de

Guillém López Casasnovas; Esther Martínez García

2001-01-01

207

Learning Languages: The Journal of the National Network for Early Language Learning, 2001-2002.  

ERIC Educational Resources Information Center

These three journal issues contain the following articles: "Japanese at Mimosa Elementary School" (Azusa Uchihara); "A Successful Keypal Project Using Varied Technologies" (Jean L. Pacheco); "Promoting a Language-Proficient Society: What You Can Do" (Kathleen M. Marcos and Joy Kreeft Peyton); "Journal Reflections of a First-Year Teacher" (Sarah…

Rosenbusch, Marcia H., Ed.

2002-01-01

208

We have evidence, they are learning: using multiple assessments to measure student information literacy learning outcomes  

Microsoft Academic Search

Best practice for assessment suggests that evidence gathered from multiple sources and viewed holistically should reinforce each other and allow for meaningful conclusions. That is how the California State University in San Marcos has embarked on assessing their Information Literacy Program. This pro-active Program targets instruction for all academic degrees and information competencies are also embedded in each lower-division General

Gabriela Sonntag

2008-01-01

209

On collective memory and social forgetting  

Microsoft Academic Search

El presente trabajo argumenta que tanto memoria como olvido, lejos del individualismo que ha caracterizado su concepción durante el siglo XX, se inscriben en la arena social y que son polos opuestos de un mismo proceso; esto es, que son producciones colectivas, es decir, sociales. Asimismo, la memoria colectiva cuenta con sus propios recursos como los marcos sociales, y los

Jorge Mendoza García

2005-01-01

210

Assessing Early Spanish Explorer Routes Through Authentication of Rock Inscriptions  

Microsoft Academic Search

Rock inscriptions containing both names and calendar dates provide place-specific data on travels of explorers, if those inscriptions are truly authentic. We exemplify here a new strategy for determining the authenticity of inscriptions in arid environments in two case studies. One is an inscription purportedly created during the Marcos de Niza expedition of 1539 through Arizona. The other might have

Ronald I. Dorn; Gordon Moore; Eduardo O. Pagán; Todd W. Bostwick; Max King; Paul Ostapuk

2011-01-01

211

Assessing Early Spanish Explorer Routes Through Authentication of Rock Inscriptions  

Microsoft Academic Search

Rock inscriptions containing both names and calendar dates provide place-specific data on travels of explorers, if those inscriptions are truly authentic. We exemplify here a new strategy for determining the authenticity of inscriptions in arid environments in two case studies. One is an inscription purportedly created during the Marcos de Niza expedition of 1539 through Arizona. The other might have

Ronald I. Dorn; Gordon Moore; Eduardo O. Pagán; Todd W. Bostwick; Max King; Paul Ostapuk

2012-01-01

212

Assessing strategies for wheat cropping in the monsoonal climate of the Pampas using the CERES-Wheat simulation model  

Microsoft Academic Search

We evaluated a series of management strategies for rainfed wheat cropping in a monsoonal climate in the Pampas using the CERES-Wheat model with 24 years of daily weather records. These strategies included the combination of two cultivars of different maturity (intermediate and short) and two sowing dates (early and late), in two different locations (Pergamino and Marcos Juarez). In addition,

Roxana Savin; Emilio H. Satorre; A. J. Hall; Gustavo A. Slafer

1995-01-01

213

MARCOPOLO-R: Near Earth Asteroid Sample Return Mission in Assessment Study Phase of ESA M3-Class Missions  

NASA Astrophysics Data System (ADS)

The goal of MarcoPolo-R is to visit a unique kind of target, a primitive binary NEA, scientifically characterize it at multiple scales, and return a unique pristine sample to Earth unaltered by the atmospheric entry process or terrestrial weathering.

Michel, P.; Barucci, M. A.; Cheng, A.; Böhnhardt, H.; Brucato, J. R.; Dotto, E.; Ehrenfreund, P.; Franchi, I.; Green, S. F.; Lara, L.-M.; Marty, B.; Koschny, D.

2012-05-01

214

The Essential Role of Ethics in the Developmen of Latin America: Convictions That Sabotage Progress: The Difficulty of Telling the Truth  

Microsoft Academic Search

Salomón Lerner (1944-), Peruvian philosopher, Rector of Pontifical Catholic University of Peru (1994-2004), Angel Escobar Jurado National Human Rights Award (2003). Marcos Aguinis (1935-), Argentine physician, former Minister of Culture in Argentina, Planeta Prize (Spain), Grand Prize of Honor by the Argentine Society of Writers. Darío Ruiz Gómez (1935-), Colombian art and literary critic, former Professor of Architecture in Medellín,

Salomón Lerner; Marcos Aguinis; Darío Ruíz Gómez

2004-01-01

215

Theory to Practice: Developmental Mathematics Program--A Model for Change  

ERIC Educational Resources Information Center

The Developmental Mathematics Program (DMP) at Texas State University-San Marcos in central Texas has undergone systemic, significant changes over the past ten years. These changes primarily resulted from the alignment to the American Mathematical Association of Two-Year Colleges' (AMATYC) Crossroads in Mathematics: Standards for Introductory…

Vasquez Mireles, Selina

2010-01-01

216

MÚSICA Y AGRUPACIONES DE CARNAVAL A FINALES DEL SIGLO XX EN ANDALUCÍA OCCIDENTAL. LA REVITALIZACIÓN FESTIVA Y EL RENACIMIENTO DEL CARNAVAL  

Microsoft Academic Search

Con este trabajo pretendemos acercarnos al Carnaval de Andalucía occidental a partir de su recuperación durante la Transición y los gobiernos socialistas en la década de los años ochenta del pasado siglo XX. Este proceso tuvo lugar en un marco de participación ciudadana, modernización económica, estado del bienestar, constitución de las comunidades autónomas, sociedad del espectáculo y del entretenimiento, y

Francisco José García Gallardo

2005-01-01

217

77 FR 31376 - Buy American Exceptions Under the American Recovery and Reinvestment Act of 2009  

Federal Register 2010, 2011, 2012, 2013

...Phoenix Housing Department for the purchase and installation of microwave ovens for the Marcos de Niza project. FOR FURTHER INFORMATION...by HUD on the basis that the relevant manufactured goods (microwave ovens) are not produced in the U.S. in sufficient...

2012-05-25

218

The College & Financial Aid Guide for: AB540 Undocumented Immigrant Students  

ERIC Educational Resources Information Center

|Since the passage of California Assembly Bill 540 in 2001, authored by the late Assemblyman, Marco Antonio Firebaugh, more than 5,000 undocumented students in California have had improved financial access to higher education. AB 540 has become a pinnacle in the lives of students, who because of their immigration status, have historically been…

Oliverez, Paz M., Ed.; Chavez, Maria Lucia, Ed.; Soriano, Mayra, Ed.; Tierney, William G., Ed.

2006-01-01

219

Aula Verde: Art as Experience in Community-Based Environmental Education  

ERIC Educational Resources Information Center

|After winning a class-action lawsuit against unconstitutional prison conditions in Puerto Rico, Marco Abarca managed to direct part of the fine monies accumulated throughout years of litigation toward an investment that would improve the living conditions in one of the largest and poorest housing projects in Puerto Rico. With the participation of…

Abarca, Marco A.

2010-01-01

220

The German scientific balloon and sounding rocket program  

Microsoft Academic Search

Sounding rocket projects in astronomy, aeronomy, magnetospheric research, material sciences, and life sciences under microgravity are described. Balloon projects in astronomy and aeronomy are presented. Satellite projects including AMPTE, SOHO, Cluster, San Marco-D, HELIOS, Giotto, Ulysses, CRAF, ISOPHOT, Rosat, and the Gamma Ray Observatory are mentioned.

A. F. Dahl; M. Otterbein

1987-01-01

221

Tests of oil recovery devices in broken ice fields. Phase I. Final report  

Microsoft Academic Search

This is the final report of full size tests of two oil spill recovery devices, the Lockheed Clean Sweep Model R2003 and the Marco Pollution Control Class I Oil Recovery System, operating in a simulated Arctic environment incorporating below freezing temperatures and ice infested waters. Tests were conducted with both devices in broken fresh water ice and salt water ice,

L. A. Schultz; P. C. Deslauriers; R. P. Voelker; O. M. Halstad; D. E. Abrams

1975-01-01

222

Computer Literacy.  

ERIC Educational Resources Information Center

|THE FOLLOWING IS THE FULL TEXT OF THIS DOCUMENT: After viewing many computer-literacy programs, we believe San Marcos Junior High School has developed a unique program which will truly develop computer literacy. Our hope is to give all students a comprehensive look at computers as they go through their two years here. They will not only learn the…

San Marcos Unified School District, CA.

223

Early Childhood in the New China: Suzhou  

ERIC Educational Resources Information Center

Suzhou is one hour to the West of Shanghai, and one of China's most interesting cities, famous for its silks, canals, and scholar gardens. According to a popular legend, Marco Polo is reputed to have said, "In heaven there is paradise, and on earth, Hangzhou and Suzhou." As the city rapidly expands, the issue of early childhood education is a…

Kalinowski, Michael

2010-01-01

224

Can Family Planning Programs Serve the Reproductive Health Needs of Special Groups of High Risk Women.  

National Technical Information Service (NTIS)

The paper is the final report of an operations research project to prevent the spread of HIV infection among registered prostitutes in Callao, the port suburb of Lima, Peru. The project was conducted by the San Marcos University Institute of Tropical Medi...

J. Alarcon O. Palacios

1990-01-01

225

Nuclear nightmares in the Philippines  

Microsoft Academic Search

The construction of the Philippine's first nuclear power plant by Westinghouse has come to symbolize the corruption and cronyism of the Marcos' years. The plant has created so much controversy that it has yet to operate, in a country that desperately needs electrical power. The entire affair suggests that American multinationals cannot simply adopt the business practices of the host

William Beaver

1994-01-01

226

Neurodevelopmental performance among school age children in rural Guatemala is associated with prenatal and postnatal exposure to carbon monoxide, a marker for exposure to woodsmoke  

Microsoft Academic Search

We investigated whether early life chronic exposure to woodsmoke, using personal passive 48-h carbon monoxide (CO) as an indicator, is associated with children's neurodevelopmental and behavioral performance. CO measures were collected every 3 months from 2002 to 2005 among mother–child dyads during the Randomized Exposure Study of Pollution Indoors and Respiratory Effects (RESPIRE) stove intervention trial in San Marcos, Guatemala.

Linda Dix-Cooper; Brenda Eskenazi; Carolina Romero; John Balmes; Kirk R. Smith

227

Community Interactions and the Logic of Experience  

Microsoft Academic Search

What are the problems challenging communities in everyday interactions? How could a radical constructivist theory of knowledge shed new light on these interactions? And what measures of success would help balance humanity and efficiency in the business world? In this article Marco Bettoni develops an unexplored connection between constructivist knowledge theory and successful community interactions. He gives seven practical recommendations

Marco Bettoni

2005-01-01

228

EL PATRIMONIO MUSICAL ESPAÑOL Y SU GESTIÓN  

Microsoft Academic Search

Este trabajo aborda la problemática que afecta al patrimonio musical español, centrándose en cuatro aspectos: 1) el concepto de patrimonio musical, todavía insuficientemente definido en España, y su consideración como una parte del patrimonio cultural; 2) las normas legales existentes para proteger el patrimonio musical; 3) la gestión del patrimonio musical en el actual marco político español; y 4) la

María Gembero Ustárroz

2005-01-01

229

The situation of Philippine Muslims  

Microsoft Academic Search

Even before the dramatic events surrounding the assassination of Philippine opposition leader Senator Benigno Aquino in August 1983, and the ensuing political crisis, it was clear to observers of the Philippine's political scene that destabilizing influences were operating on the regime of President Ferdinand Marcos and that groups both within the regime and in opposition to it were man?oeuvering for

R. J. May

1984-01-01

230

Los programas informáticos P2P y las nuevas perspectivas de la industria musical en Norteamérica y Europa  

Microsoft Academic Search

Internet puede calificarse como un verdadero catalizador social que avanza tendencias y comportamientos y que presenta constantes desafíos a los marcos jurídico-políticos y socioculturales de los países del mundo. En relación con la transmisión de datos por la red, uno de los problemas que ha ocasionado más controversia es el de los programas de intercambio de archivos en la red

Guillem Baladia Puche; Eduardo Riol Carvajal

2007-01-01

231

Business Students' Perceptions of Mathematics: Can We Overcome Math Anxiety?  

Microsoft Academic Search

This study seeks to determine student attitudes towards taking quantitative courses. A study was undertaken in sophomore accounting (principles and managerial) and business statistics courses at Texas State University-San Marcos. Respondents were asked to complete 15 questions concerning their attitudes towards math courses. Statistical analysis of the survey results is presented. An examination of the literature regarding math education is

Dennis L. Elam; James R. Cook

232

Another Way of Knowing: Visualizing the Ancient Silk Routes  

ERIC Educational Resources Information Center

|One way that people learn, remember and communicate is visually. We combine past experiences with new visual information to construct meaning. In this study, elementary teachers introduced their students to the peoples and places of the ancient silk routes using illustrations from two children's picture books, "Marco Polo," written by Gian Paolo…

Bisland, Beverly Milner

2010-01-01

233

Constructing Knowledge with Silk Road Visuals  

ERIC Educational Resources Information Center

|In this study a group of elementary teachers use illustrations, rather than written text, to introduce their students to the peoples and places of the ancient silk routes. The illustrations are from two picture books; "Marco Polo," written by Gian Paolo Cesaerani and illustrated by Piero Ventura (1977), and "We're Riding on a Caravan: An…

Bisland, Beverly Milner

2008-01-01

234

From Virtual Public Spheres to Global Justice: A Critical Theory of Internetworked Social Movements  

Microsoft Academic Search

From the early 1990s when the EZLN (the Zapatistas), led by Subcommandte Marcos, first made use of the Internet to the late 1990s with the defeat of the Multilateral Agreement on Trade and Investment and the anti-WTO protests in Seattle, Quebec, and Genoa, it became evident that new, qualitatively different kinds of social protest movements were emergent. These new movements

Lauren Langman

2005-01-01

235

Filipinos in America: Target Constituency for the "New Society".  

ERIC Educational Resources Information Center

The increasing number of Filipino immigrants to America has coincided with the martial law era in the Philippines. Consequently, this exodus has become a significant political issue for the government of Ferdinand Marcos. Since the Filipino government wishes to retain positive influence and goodwill with those who choose to settle elsewhere, it…

Richter, Linda

236

In Search of the Middle School Teacher: Navigating Research, Reality, and Mission  

ERIC Educational Resources Information Center

The Middle Level Program at California State University San Marcos is the only middle level teacher credential program in the state of California. The program is based on a set of goals and philosophy of middle grades education, recognizing the developmental needs of young adolescents in Grades 5 through 9, and the socially equitable experience of…

Chen, Rong-Ji; Daniels, Erika; Chaplin, Mae S.; Ochanji, Moses; Stowell, Laurie P.; McDaniel, Janet E.

2012-01-01

237

Modelos vs. dibujos: el caso de la enseñanza de las fuerzas intermoleculares  

Microsoft Academic Search

Resumen: En el presente trabajo se analizan las explicaciones verbales y gráficas confeccionadas por docentes para explicar fenómenos de solubilidad, inmiscibilidad y formación de una emulsión con mezclas de agua, alcohol y aceite. El análisis permite considerar la complejidad de los lenguajes expertos como fuente de obstáculos epistemológicos en la comunicación entre docentes y estudiantes. Finalmente, se propone un marco

Lydia Galagovsky; María Angélica Di Giacomo; Verónica Castelo

238

Academic Travel: Modes and Directions  

ERIC Educational Resources Information Center

The Great Khan's atlas contains also the maps of the promised lands visited in thought but not yet discovered or founded: New Atlantis, Utopia, the City of the Sun, Oceana, Tamoe, New Harmony, New Lanark, Icaria. Kublai asked Marco: "You, who go about exploring and who see signs, can you tell me towards which of these futures the favouring winds…

Barnett, Ronald; Phipps, Alison

2005-01-01

239

Mothers who silence themselves: A concept with clinical implications for women living with HIV\\/AIDS and their children  

Microsoft Academic Search

The number of women newly infected with the human immunodeficiency virus (HIV) continues to rise. Women living with HIV or the acquired immunodeficiency syndrome (AIDS) are often mothers who deal with the unenviable task of balancing the stigma and physical needs of illness with the needs of their families and, in particular, their children (DeMarco, Johnsen, Fukuda, [amp ] Deffenbaugh,

Rosanna DeMarco; M. Marcia Lynch; Rhonda Board

2002-01-01

240

Small Steps, Big Changes: Eight Essential Practices for Transforming Schools through Mathematics  

ERIC Educational Resources Information Center

|During the past two decades, Chris Confer and Marco Ramirez have worked to deepen and improve mathematics instruction at schools around the country. Wherever they go, they find the raw ingredients for success already present: "The potential for positive change lies within each school. Abundance is present in the form of capable children,…

Confer, Chris; Ramirez, Marco

2012-01-01

241

Remarks on l-conformal extension of the Newton-Hooke algebra  

NASA Astrophysics Data System (ADS)

The l-conformal extension of the Newton-Hooke algebra proposed in [J. Negro, M.A. del Olmo, A. Rodriguez-Marco, J. Math. Phys. 38 (1997) 3810] is formulated in the basis in which the flat space limit is unambiguous. Admissible central charges are specified. The infinite-dimensional Virasoro-Kac-Moody type extension is given.

Galajinsky, Anton; Masterov, Ivan

2011-08-01

242

Freshwater fishes and aquatic habitats in Peru: Current knowledge and conservation  

Microsoft Academic Search

Peruvian freshwater fishes and their habitats were investigated by the Natural History Museum of San Marcos University (MHNSM) as part of a long-term project. Fishes were inventoried by sampling in main drainage basins, including coastal rivers, highland rivers, and Peru's Amazonian waters. To date, the MHNSM fish collection has approximately 300,000 specimens comprising 1000 valid species in 168 families and

Hernán Ortega; Max Hidalgo

2008-01-01

243

From Social Identity to Professional Identity: Issues of Language and Gender  

ERIC Educational Resources Information Center

|This study draws from sociocultural theory to examine how biographical factors interplay with contextual factors to shape the professional identity of a Spanish language teacher candidate. Specifically, it explores the student teaching experience of Marcos, a 30-year-old language teacher candidate from South America. Analysis of the data reveals…

Velez-Rendon, Gloria

2010-01-01

244

CAIO GRACO AND HIS RELATIONSHIP WITH THE EQUITES (1st century BC): A BRIEF ANALYSIS OF APIAN OF ALEXANDRIA'S INTERPRETATION (2nd century AD)  

Microsoft Academic Search

RESUMO: Propomos aqui uma análise do relato de Apiano de Alexandria sobre a relação de Caio Graco com a ordem eqüestre no final do século II a.C.. Apiano escreveu suas Guerras Civis já no fim da vida, durante o reinado de Marco Aurélio, época de paz interna e estabilidade e expansão. Em seu relato, Apiano demonstra simpatia pelo projeto reformista

Alice Maria de Souza

245

Effective Deburring of Micro Burr Using Magnetic Abrasive Finishing Method  

Microsoft Academic Search

Micro burrs formed in micro parts are not subject to be removed by the conventional deburring method for marco parts. Magnetic abrasive deburring method which was proved to be effective for small burrs are applied for deburring the micro burr in electric gun parts used in TV monitor. A specific magnetic inductor is designed and manufactured for this part. To

Jung Il Park; S.-L. Ko; Y. H. Hanh; Yuri M. Baron

2005-01-01

246

Efecto protector del Aloe vera (sábila) en lesiones gástricas inducidas con etanol en ratas Protective effect of Aloe vera in injuries gastric  

Microsoft Academic Search

Objective: To determine the cytoprotective effect of Aloe Vera (Sabila) on gastric mucosa and compare them with those produced by sucralfate in the experimentation animals. Design: Experimental study. Setting: San Marcos University Institute of Pathology. Lima, Perú. Materials: thirty six albino female rats were evaluated, of the specie Ratus norvegicus strain Holtzman of Instituto Nacional de Salud, Lima-Perú Interventions: Following

Ronald Arce; Janet Molina-Ordóñez; Fiorella Morán; José Moreno-Lozano

2007-01-01

247

The Luiseno Culture Bank Project: From Museum Shelves to HyperCard.  

ERIC Educational Resources Information Center

In the 1970s, elders and volunteers of the San Luiseno Band of Mission Indians secured a grant to create a Luiseno Culture Bank of Luiseno artifacts and information gathered from museums, libraries, and private collections. Librarians from California State University, San Marcos, are now mounting the culture bank onto a HyperCard database. (KS)

Biggs, Bonnie; Herlihy, Catherine S.

1994-01-01

248

Bilingualism and Bilingual Education in a Complex Context  

ERIC Educational Resources Information Center

|This article is based on results from a baseline study for an intended intervention project in bilingual-intercultural education in the Municipality of San Miguel Ixtahuacan, in the Department of San Marcos, Guatemala. To a great extent the article deals with issues of bilingual education from the perspective of social justice. It analyses the…

Herrera, Lazaro Moreno; Wedin, Asa

2010-01-01

249

Another Way of Knowing: Visualizing the Ancient Silk Routes  

Microsoft Academic Search

One way that people learn, remember and communicate is visually. We combine past experiences with new visual information to construct meaning. In this study, elementary teachers introduced their students to the peoples and places of the ancient silk routes using illustrations from two children's picture books, Marco Polo, written by Gian Paolo Cesaerani and illustrated by Piero Ventura (1977), and

Beverly Milner Bisland

2010-01-01

250

La croissance française à l'horizon de 1992 : des besoins d'investissement encore importants à financer  

Microsoft Academic Search

[spa] El crecimiento de la economía francesa en el horizonte de 1992 : Subsisten aún necesidades importantes de inversión para financiar - Según las proyecciones llevadas a cabo en el marco de la preparación del X Plan, el ritmo medio de expansion de la economía francesa sería del orden de un 3% desde ahora hasta 1992, es decir un ritmo

Laurence Bloch

1989-01-01

251

Exposure to TDI among a group of voluntary firefighters  

Microsoft Academic Search

Seventeen voluntary firefighters from the city of Marcos Juarez, Province of Cordoba, Argentina, accidentally exposed to isocyanate fumes during blazes at a polyurethane manufacturing plant have been studied. Exposures took place twice: a 15?day timespan elapsed between each blaze. Firefighters were exposed to TDI for 3 h 30 min during the first blaze while the second exposure lasted 1 h

Daniel Lerda

1995-01-01

252

Early Childhood in the New China: Suzhou  

ERIC Educational Resources Information Center

|Suzhou is one hour to the West of Shanghai, and one of China's most interesting cities, famous for its silks, canals, and scholar gardens. According to a popular legend, Marco Polo is reputed to have said, "In heaven there is paradise, and on earth, Hangzhou and Suzhou." As the city rapidly expands, the issue of early childhood education is a…

Kalinowski, Michael

2010-01-01

253

A spreadsheet that calculates meteor orbits  

NASA Astrophysics Data System (ADS)

The author has written an MS Excel spreadsheet application called Metorb08.xls which calculates a meteor's orbital elements from its apparent radiant position and initial speed. It can be downloaded from URL http://home.wanadoo.nl/marco.langbroek along with a suite of other meteor-related Excel applications.

Langbroek, M.

2004-08-01

254

La negociación, una competencia fundamental para el diálogo social  

Microsoft Academic Search

Este artículo plantea que una adecuada implementación del diálogo social requiere de actores competentes para negociar y construir consensos. Un marco legal adecuado y la buena disposición de los actores son condiciones necesarias pero no suficientes para un diálogo social efectivo. Es indispensable el desarrollo de habilidades y competencias, como la negociación, que lo hagan posible. Con base en diversas

María Clara Jaramillo Jaramillo

2011-01-01

255

LA PROBLEMÁTICA DE LA CLASIFICACIÓN DE LA CONSONANCIA EN EL SIGLO XVI Y LA TEORÍA DE LA CONSONANCIA DE FRANCISCO SALINAS  

Microsoft Academic Search

A mediados del siglo XVI nos encontramos con una clasificación de los intervalos consonantes más o menos admitida por todos los teóricos del momento: son consonancias perfectas la octava, la quinta y la cuarta, mientras que son consonancias imperfectas las terceras y las sextas. Zarlino incluso desarrolla un marco metafísico (el numero senario) de explicación de la consonancia que intenta

Amaya Sara García Pérez

2003-01-01

256

A Collaborative Action Research Model for Teacher Preparation Programs.  

ERIC Educational Resources Information Center

|Describes two teacher-preparation programs at California State University, San Marcos, that integrate action research. The paper highlights models for implementing action research and presents four examples of action research through the voices of preservice teachers. Preliminary findings suggest that both preservice teachers and supervisors…

Keating, Joseph; Diaz-Greenberg, Rosario; Baldwin, Mark; Thousand, Jacqueline

1998-01-01

257

The Development of a Lower-Division, General Education, Course-Integrated Information Literacy Program.  

ERIC Educational Resources Information Center

|Presents a model for a course on information literacy that was developed by librarians at California State University at San Marcos. Topics include the role of the library in higher education reform; active learning activities; convincing faculty and administrators of the need for information literacy courses; and future implementation. (LRW)|

Sonntag, Gabriela; Ohr, Donna M.

1996-01-01

258

Governance Structure: Palomar College.  

ERIC Educational Resources Information Center

|The governance structure of Palomar College (PC) in San Marcos, California, is defined in the plan described in this document. Introductory material indicates that the plan was designed to provide appropriate representation for each of PC's constituent groups, delineate committee responsibilities and reporting relationships, establish the…

Palomar Coll., San Marcos, CA.

259

In Search of the Middle School Teacher: Navigating Research, Reality, and Mission  

ERIC Educational Resources Information Center

|The Middle Level Program at California State University San Marcos is the only middle level teacher credential program in the state of California. The program is based on a set of goals and philosophy of middle grades education, recognizing the developmental needs of young adolescents in Grades 5 through 9, and the socially equitable experience…

Chen, Rong-Ji; Daniels, Erika; Chaplin, Mae S.; Ochanji, Moses; Stowell, Laurie P.; McDaniel, Janet E.

2012-01-01

260

A Decade of Reform in Geographic Education: Inventory and Prospect.  

ERIC Educational Resources Information Center

|This book emerged from a "Summit in Geographic Education" at Southwest Texas State University in San Marcos, Texas, May 1993. This volume is comprised mainly of the papers prepared for the Summit. The book is divided into four sections: (1) "A View from the Summit"; (2) "The Reform Movement in School Geography"; (3) "Higher Education's Role in…

Bednarz, Robert S., Ed.; Peterson, James F., Ed.

261

Using Business Student Consultants to Benchmark and Develop a Library Marketing Plan  

Microsoft Academic Search

Students in a year-long capstone business course, serving as “consultants” to librarians, prepared a marketing plan in preparation for a move into a new library building at California State University at San Marcos (CSUSM). The project goal was to have a marketing plan as well as a communication and planning tool as the library moved. Across all measures, students were

Yvonne Nalani Meulemans; Ann Manning Fiegen

2006-01-01

262

Schooling and Bilingualization in a Highland Guatemalan Community.  

ERIC Educational Resources Information Center

|To examine the process of language shift (bilingualization) in an area where there is a local dialect equivalent to a "language of solidarity" and a national language equivalent to a "language of power," language interactions in the impoverished village of San Marcos in the highlands of Guatemala were examined. Although Spanish is the national…

Richards, Julia Becker

263

Computer Literacy.  

National Technical Information Service (NTIS)

San Marcos Junior High School has developed a unique program which will develop computer literacy. They not only learn the parts of the computer, how it works, and the historical and social aspects of computers, but also gain first-hand experience in usin...

1984-01-01

264

Children's Attitudes toward Geography: A Texas Case Study.  

ERIC Educational Resources Information Center

|Reviews surveys concerning the attitudes of San Marcos (Texas) school children toward geography in 1983 and 1993. Shows that they generally ranked geography low on their list of favorite subjects; however, discerns statistically significant improvement in the popularity of geography over the decade, tentatively associated with more active…

Sack, Dorothy; Petersen, James F.

1998-01-01

265

Practical Ideas and Resources for Offering a Quality Group Program to Spanish-Speaking Families and Their Infants and Toddlers.  

ERIC Educational Resources Information Center

|This conference presentation describes services to Spanish speaking families developed by the Hope Infant Family Support Program in San Marcos, California. It discusses the program's evolution from one-on-one translation, to a more bilingual program, to monolingual Spanish, and shares the pitfalls and the successful strategies encountered in…

Valdivia, Rebeca

266

A Look Back at the First Five Years in a New College of Education.  

ERIC Educational Resources Information Center

|Describes the experiences of building California State University at San Marcos's College of Education from the ground up. The college was intended to be responsive and professionally relevant. The first step was developing a mission and core beliefs. The governance structure reflected the commitment to collaboration, collegiality, and a learning…

Lilly, Steve

1996-01-01

267

A Model History Course: History Practicum--Researching, Writing, and Publishing Local History.  

ERIC Educational Resources Information Center

|Describes the Southwest Texas State University course "History Practicum: Researching, Writing, and Publishing Local History" that stresses computer proficiency, teamwork, and active learning. Students create and publish a guidebook for a town, city, or historic site in central Texas. Discusses the publication process of "San Marcos: A Guide to a…

Bourgeois, E. J., II

1999-01-01

268

Gender vs. Sex Differences: Factors Affecting Performance in Geographic Education.  

ERIC Educational Resources Information Center

|Summarizes a pilot study that compared performance in geography with gender in which students were surveyed in two introductory geography classes at Southwest Texas State University (San Marcos, Texas). Indicates that the relationship between gender and geographic learning is more complex than originally believed. (CMK)|

Hardwick, Susan W.; Bean, Lydia L.; Alexander, Kathy A.; Shelley, Fred M.

2000-01-01

269

Using Technology in a First Year Experience Course.  

ERIC Educational Resources Information Center

|Discusses first year experience (FYE) courses that focus on academic achievement and student adjustment to college life. Describes the development of a Web-based instructional module for a FYE course at California State University, San Marcos that includes a library component that teaches information literacy and library skills. (Author/LRW)|

Sonntag, Gabriela

1999-01-01

270

Motivate!  

ERIC Educational Resources Information Center

|Mary Jo Garcia Biggs never really considered herself much of a technophile. Sure, the assistant professor at Texas State University-San Marcos knew her way around a web page, but for years, she was painfully aware of all of the technologies she didn't know much about. More times than not, the limitations of her knowledge frustrated the heck out…

Villano, Matt

2008-01-01

271

Information Seeking Behavior of Business Students: A Research Study.  

ERIC Educational Resources Information Center

|In a study of library use and research behavior, 91 undergraduate and 68 graduate business students at California State University San Marcos were surveyed and observed for query formulation and task assignments, prereference process expectations, and postreference process responses. Findings support past research by pointing to user impatience…

Atkinson, Joseph D., III; Figueroa, Miguel

1997-01-01

272

Fostering Change for Democratic Middle Schools through Teacher Education.  

ERIC Educational Resources Information Center

|Describes tools used in California State University San Marcos' middle level teacher education program and their broad purposes. Discusses themes used in teaching, how curriculum has been embedded in those themes, and how students have responded to them. Also explores growth in the program's thinking about teaching as a moral activity focused on…

Stowell, Laura P.; McDaniel, Janet E.; Rios, Francisco A.

1995-01-01

273

A Study of an Alternative High School: Focus, Features and Impact.  

ERIC Educational Resources Information Center

|This paper describes a study of an alternative, innovative high school designed to serve at-risk students and dropouts returning to public school. The PRIDE (Positive Responsible Individuals Desiring Education) Center, located in San Marcos (Texas) Consolidated Independent School District, opened in September 1989. The center's program includes…

Barnes, Susan; Stewart, Jane

274

Interactive Technology Brings Algebra to All.  

ERIC Educational Resources Information Center

|Partnership for Access to Higher Mathematics uses fiber-optic technology in a partnership program among Southwest Texas State University, the San Marcos School District, the telephone company, and the community to significantly improve the mathematical skills of at-risk students. (MLF)|

Kennedy, Paul A.; Chavkin, Nancy Feyl

1993-01-01

275

Individual research consultation service: an important part of an information literacy program  

Microsoft Academic Search

Individual Research Consultation Service (IRCS) has long played an important role in teaching and assisting students to find information resources. Based on a study of IRCS at California State University San Marcos (CSUSM) Library, this article discusses the important contributions IRCS has made to the information literacy (IL) program. Using quantitative data and qualitative evidence, the article demonstrates how the

Hua Yi

2003-01-01

276

Field Test Results of a Workbook Approach to Improving the Self-Concepts and Motivation Levels of Vocational Students.  

ERIC Educational Resources Information Center

|Self-paced, individualized student and teacher workbooks were designed to improve the self-concept and motivation levels of vocational students. The program was based on the correlation between self-concept and school achievement. The program was field tested with 41 Job Corps students from the Gary Job Corps Center in San Marcos, Texas, and…

Rogers, Sandra K.; Thorpe, John

277

Noteworthy Books in Spanish for Adolescents.  

ERIC Educational Resources Information Center

|This annotated bibliography lists 28 books in Spanish recommended for adolescents and published in 1990-92. Categories include biography, fiction, health, history, poetry, and science. The work of the Center of the Study of Books in Spanish for Children and Adolescents, at the California State University, San Marcos, is also described. (MSE)|

Schon, Isabel

1993-01-01

278

Making the Path by Walking It.  

ERIC Educational Resources Information Center

|Describes preservice teacher education reform efforts at California State University San Marcos via program development and curricular design innovation. Beginning faculty worked on creating a middle level teacher education program informed by critiques of teacher education, visions for restructured middle schooling, and institutional realities.…

Rios, Francisco A.; And Others

1996-01-01

279

Final Evaluation Report of the Harlandale Independent School District's Bilingual Education Program.  

ERIC Educational Resources Information Center

|The program covers two Texas public school districts, Harlandale and San Marcos, and Southwest Texas State University. This report, however, deals only with the Harlandale Bilingual Education Program, which provides bilingual education for pupils in grades K-5 who have limited English speaking ability. Objectives are: to reduce their educational…

Harrison, Helene W.

280

Turned on by Tutoring.  

ERIC Educational Resources Information Center

|Ninth graders in a six-week reading improvement class at San Marcos High School (Texas) acted as tutors in an elementary school. The ninth graders' self-confidence, attitude, and attendance improved dramatically, but their own progress in reading did not, because of the short duration of the project. (DM)|

Pino, Carol

1990-01-01

281

A Quiet Revolution in Teacher Training.  

ERIC Educational Resources Information Center

|In 1992, collaborators from the San Marcos and Austin school districts, Southwest Texas State University, a regional education service center, and a telephone company formed the Center for Professional Development and Technology. Their goal was utilizing technology to redesign teacher education within a classroom context. Teachers learn to use…

Curtin, Pat; And Others

1994-01-01

282

Producing Better Writers in Sociology Classes: A Test of the Writing-across-the-Curriculum Approach.  

ERIC Educational Resources Information Center

|Examines the writing-across-the-curriculum approach to teaching writing skills. Reports the results of a study involving classes at Southwest Texas State University (San Marcos). The papers in 10 sociology, 2 English, and 1 general studies classes were assigned with varying frequency and graded more or less rigorously. Results do not support this…

Day, Susan

1989-01-01

283

Autoevaluación de formación en habilidades de entrevista, relación médico paciente y comunicación en médicos graduados  

Microsoft Academic Search

Abstract Objective: To assess the perception of medical graduates in regards to their training in medical interview, physician-patient relationship and communication skills. Materials and Methods: Applicants to a 2005-residencypost at the Universidad Nacional Mayor de San Marcos participated in the study. The questionnaire was designed adapting three instruments. Validity and reliability studies were carried out. Results: A total of 917

Cecilia Sogi; Salomón Zavala; Miguel Oliveros; Carlos Salcedo

2006-01-01

284

Preparing Secondary Preservice Teachers for Second to None Schools. Part 1--Program Development and Part 2--Implementation.  

ERIC Educational Resources Information Center

|California State University San Marcos (CSUSM) College of Education implemented a Single Subject Credential Program (Secondary Program) in the Fall of 1995. The first part of this paper reviews the program's two-year developmental process, which includes the program's history, vision, and planning. The following areas were determined to be…

Baldwin, Mark D.; Keating, Joseph F.

285

Casting Wide the Net: Portfolio Assessment in Teacher Education.  

ERIC Educational Resources Information Center

|Historically, student teachers learn to evaluate students much as they do many teaching elements--from personal classroom experiences. In 1992-93, four faculty members at California State University (San Marcos) piloted a team-taught middle-level teacher education program that modeled effective teaching and assessment practices for use with young…

Stowell, Laura P.; And Others

1993-01-01

286

The Luiseno Culture Bank Project: From Museum Shelves to HyperCard.  

ERIC Educational Resources Information Center

|In the 1970s, elders and volunteers of the San Luiseno Band of Mission Indians secured a grant to create a Luiseno Culture Bank of Luiseno artifacts and information gathered from museums, libraries, and private collections. Librarians from California State University, San Marcos, are now mounting the culture bank onto a HyperCard database. (KS)|

Biggs, Bonnie; Herlihy, Catherine S.

1994-01-01

287

Analysis in Outline of Mam, a Mayan Language. Working Paper of the Language Behavior Research Laboratory, No. 25.  

ERIC Educational Resources Information Center

|The primary goal of the present study is an exposition of the structure of Mam, a Mayan language of the Mamean group. Mam is the most widely spoken of the four Mamean languages, and has been roughly estimated to have a quarter million speakers located in the departments of Huehuetenango and San Marcos in Guatemala and in the state of Chiapas in…

Canger, Una R.

288

Final Approval of San Diego State University's Proposal to Construct a North County Center. A Report to the Governor and Legislature Supplementing the Commission's February 1987 Conditional Approval of the Center.  

ERIC Educational Resources Information Center

|A plan to establish an upper-division and graduate off-campus center of San Diego State University in the City of San Marcos is presented to the California Postsecondary Education Commission. Attention is directed to: revised enrollment projections, an academic master plan, a student services plan, and a plan for serving disadvantaged students.…

California State Postsecondary Education Commission, Sacramento.

289

School Subtracts Math Texts to Add E-Lessons, Tests  

ERIC Educational Resources Information Center

|This article discusses how math teachers at San Marcos High School turned to an online curriculum and in-class assessments to increase student achievement. Setting aside their 7-year-old textbooks, teachers filled the void largely with an online math curriculum, called Agile Mind, that comes equipped with an array of assessment tools. The idea…

Trotter, Andrew

2007-01-01

290

At the (Kineto)chore, Yeast Really Are Like People.  

PubMed

Proper chromosome segregation depends on correct attachments between microtubules and kinetochores. Budding yeast have been thought to achieve these attachments with different kinetics than other eukaryotes. Now, deploying specialized data processing techniques to achieve super-resolution images, Marco et al. demonstrate that this tractable cell-cycle model system shares more similarities with plants and animals than previously thought. PMID:23993089

Swedlow, Jason R

2013-08-29

291

David Hurst Thomas and the Historical Archaeology of the Spanish Borderlands.  

ERIC Educational Resources Information Center

Discusses David Hurst Thomas' archaeological work on the Spanish borderlands, which integrates field archaeology and documentary history. Focuses on locating and studying the Santa Catalina de Guale. Addresses his project on the Pueblo San Marcos that will further test his ideas about the Spanish mission period. (CMK)

Snead, James E.

2000-01-01

292

CoNoCIMIeNToS SoBRe VIH\\/SIDA Y PRÁCTICAS SeXUALeS De eSCoLAReS De TACNA, PeRÚ 2004  

Microsoft Academic Search

ReSUMeN Objetivo: Determinar el nivel de conocimientos sobre el VIH\\/SIDA y las prácticas sexuales de los escolares de 14 a 17 años de la ciudad de Tacna, Perú. Materiales y métodos: Estudio transversal realizado entre septiembre y noviembre del 2004, se realizó un muestreo probabilística bietápico por conglomerados en instituciones educativas nacionales y privadas. Se incluyeron 399 escolares que respondieron

Fresia Catacora-López; Javier Villanueva-Roque

293

Wavelength dependence of reflectometric cone photoreceptor directionality  

NASA Astrophysics Data System (ADS)

We present evidence for the wavelength dependence of the directionality of light reflected from cone receptor cells (optical Stiles-Crawford effect): Blue light is more directional than red. According to the waveguide-scattering model of Marcos et al. [J. Opt. Soc. Am. A 15, 2012 (1998)], directionality is the sum of a waveguide component and a scattering component. The latter is proportional to 1 over wavelength squared, and it is related to the row-to-row spacing of the cone lattice. Our results allow a firm confirmation of Marcos et al.'s theory. For a 1.9-deg foveal area, group mean (n=18) cone spacing was 3.42 ?m, in good agreement with anatomical data. Group mean waveguide directionality was 0.077 mm-2.

Zagers, Niels P. A.; Berendschot, Tos T. J. M.; van Norren, Dirk

2003-01-01

294

Aggradation in response to extreme flooding and watershed management  

NASA Astrophysics Data System (ADS)

In 1998, the San Marcos River, located along the Balcones Escarpment in Central Texas, experienced the largest flood in its recorded history. The San Marcos is a heavily managed watershed containing flood control dams, reaches of channelized flow, and a man made lake. This study examines changes to the fluvial system as a result of the combination of an extreme flow event and watershed management practices. The flood caused mass wasting and channel bed aggradation. Since the flood, watershed management practices and flood retention structures have reduced the ability of the flows to transport sediment through the channel. Results indicate that since flood control measures were implemented, only two flood events could have produced any significant transport of material in the study reach. The lasting effect has been an increase in the width to depth ratio in the downstream portion of the river and the creation of a large sediment bar in the upstream channel reach.

Engel, F. L.; Curran, J. C.

2006-12-01

295

Constructing Physical Input-Output Tables with Material Flow Analysis (MFA) Data: Bottom-Up Case Studies  

Microsoft Academic Search

In an economic system that aims at sustainable development, material indicators become increasingly more important than monetary\\u000a indicators, as much of the literature now testifies (Ayres and Ayres 1998). Monetary indicators are often not able to reveal\\u000a all the implications and interactions between the biosphere and technosphere (Nebbia 2000; De Marco et al. 2001).\\u000a \\u000a The knowledge of these indicators is

Ottilia De Marco; Giovanni Lagioia; Vera Amicarelli; Antonella Sgaramella

296

The light curve of V605 Aql - the `older twin' of Sakurai's Object  

NASA Astrophysics Data System (ADS)

`Nova Aquilae No. 4', discovered in 1919, later renamed V605 Aql, was recognized to be a final helium flash object only in the 1980s. Clayton and De Marco (1997) gave a detailed description of the available spectroscopic and photometric material. Here we try to re-analyze the photometric record. The photographic material is still available and has been used to construct a revised light curve. Only fragments of the visual observations were published; the remainder appears to be lost.

Duerbeck, Hilmar W.; Hazen, Martha L.; Misch, Anthony A.; Seitter, Waltraut C.

297

Development and evaluation of C18 and immunosorbent solid-phase extraction methods prior immunochemical analysis of chlorophenols in human urine  

Microsoft Academic Search

Two solid-phase extraction (SPE) methods, based on hydrophobic and selective (antibody–antigen) interactions, have been established and evaluated as clean-up methods prior the immunochemical analysis of 2,4,6-trichlorophenol (2,4,6-TCP) in urine samples. Without a clean-up method the extent of interferences caused by the urine matrix in the ELISA [R. Galve, M. Nichkova, F. Camps, F. Sanchez-Baeza, M.-P. Marco, Anal. Chem. 74 (2002)

Mikaela Nichkova; M.-Pilar Marco

2005-01-01

298

In the Womb of the Global Economy: Anak and the Construction of Transnational Imaginaries  

Microsoft Academic Search

: This article intervenes into the connections between Philippine cinema’s construction of transnational imaginaries and the post-Marcos era when neoliberal policies such as the export of feminized labor to developed countries by so-called “third world” countries like the Philippines have produced not only cultural values that are attuned to the culture of diasporic labor but also economic value in the

Sarah Raymundo

2011-01-01

299

In the Womb of the Global Economy: Anak and the Construction of Transnational Imaginaries  

Microsoft Academic Search

This article intervenes into the connections between Philippine cinema’s construction of transnational imaginaries and the post-Marcos era when neoliberal policies such as the export of feminized labor to developed countries by so-called “third world” countries like the Philippines have produced not only cultural values that are attuned to the culture of diasporic labor but also economic value in the form

Sarah Raymundo

2011-01-01

300

Trophic ecology of a nonnative population of suckermouth catfish ( Hypostomus plecostomus ) in a central Texas spring-fed stream  

Microsoft Academic Search

Introduced suckermouth catfishes (Family Loricariidae) are now established in a number of spring-influenced streams in North\\u000a America but their impacts on native biota are not well documented. Purposes of this study were to quantify gut contents of\\u000a the loricariid Hypostomus plecostomus from the San Marcos River in central Texas and to evaluate the role of H. plecostomus in the San

Katrina L. Pound; Weston H. Nowlin; David G. Huffman; Timothy H. Bonner

2011-01-01

301

Program and Abstracts, Boron Americas IX Final Report  

SciTech Connect

The Scientific and Technical Information (STI) submitted includes the final report and a collection of abstracts for the Ninth Boron in the Americas Conference which was held May 19-22, 2004, in San Marcos, Texas. The topics covered in the abstracts include: Application in Medicine, Application in Organic Synthesis and Catalysis, Boranes and Carboranes, Materials and Polymers, Metallaboranes and Metallacarboranes, Organoboron Compounds, Synthesis and Catalysis, and Theoretical Studies. Attendees represented researchers from government, industry, and academia.

Feakes, Debra A.

2006-08-09

302

Reflective Teaching in Social Work Education: Findings from a Participatory Action Research Study  

Microsoft Academic Search

This article describes a feminist-informed reflective teaching project enacted by a group of social work faculty at Texas State University–San Marcos. Utilizing Schon's notion of reflection-in-action, faculty formed a participatory action research group to implement reflective techniques to further their professional development as new teachers and better prepare social work students for practice in the social work profession. This project

Christine Lynn Norton; Amy Russell; Betsy Wisner; John Uriarte

2011-01-01

303

Capturing genetic diversity of wild populations for ex situ conservation: Texas wild rice ( Zizania texana ) as a model  

Microsoft Academic Search

Genebanks complement other conservation programs because they preserve genetic diversity needed for future breeding and restoration.\\u000a We evaluated efficiency of capturing genetic diversity, using endangered Zizania texana (Texas wild rice) as a model for plants with recalcitrant seeds. This perennial aquatic grass is restricted to 4 km of the\\u000a San Marcos River in Texas. An early conservation collection included plants from

Christopher M. Richards; Michael F. Antolin; Ann Reilley; Jackie Poole; Christina Walters

2007-01-01

304

Development and cross-amplification of nine novel Gambusia geiseri microsatellite loci in G. clark - hubbsi and the endangered G. nobilis  

Microsoft Academic Search

The largespring Gambusia, Gambusia geiseri, is a stenohaline livebearing fish (Poeciliidae) native to the headwaters of the San Marcos and Comal Rivers, Texas. After\\u000a introductions for mosquito control (circa 1930), founder populations persisted in several cool water spring systems throughout\\u000a west Texas, making them invasive and ideal for studies in evolutionary and conservation biology. Herein, we developed nine\\u000a polymorphic microsatellite

James C. Cureton; Anna B. Buchman; Christopher P. Randle; William I. Lutterschmidt; Raelynn Deaton

2010-01-01

305

Science Signaling Podcast: 8 March 2011  

NSDL National Science Digital Library

This Podcast features a conversation with the authors of a Research Article published in the 4 March 2011 issue of Science. Marcos González-Gaitán and Frank Jülicher discuss their mathematical description of how the graded concentration of the morphogen Dpp induces homogeneous cellular proliferation across the fly wing and haltere imaginal discs. They propose a mechanism by which changes in activation of the Dpp signaling pathway over time account for the observed growth of discs.

Marcos Gonzalez-Gaitan (Geneva University;Departments of Biochemistry and Molecular Biology REV); Frank Julicher (Dresden;Max Planck Institute for the Physics of Complex Systems REV); Annalisa M. VanHook (American Association for the Advancement of Science;Science Signaling REV)

2011-03-08

306

Philippines.  

PubMed

The Philippines is an archipelago of 7100 islands and islets, 11 of which compose about 95% of the total area and population. The majority of the Filipinos are descendants of Indonesians and Malays. Approximately 90% of the population are Christian with the majority of the remaining 10% being Moslems. In the 1960s, the annual population growth rate was roughly 3%, but it fell to 2.4% in the late 1970s and was still 2.4% in 1985. In 1970, President Marcos implemented an official family planning policy to reduce the high growth rate and thereby stimulate economic development. A population commission coordinates family planning efforts. Both the Spanish (1521-1898) and the United States (1898-1946) have ruled the Philippines with a brief occupation by the Japanese (1942-1945). The US assisted in the reconstruction of the economy following World War II and continues to maintain and operate military bases. Further, from 1946-1986, the Philippines has received $3.7 billion in economic and military assistance from the US. The government operated under a constitutional democracy from 1946-1972, but in 1972 President Marcos declared martial law. In 1981, martial law ended and Marcos called for a presidential election. After winning the election, he called for an amendment of the 1972 constitution making him, rather than the prime minister, the head of government. Even though martial law ended in 1981, the Marcos government retained its wide powers to arrest and detain anyone. In February 1986, popular support backed by a peaceful civilian-military uprising brought Corazon Aquino to the Presidency. In the mid 1980s a severe economic recession hit the Philippines with the real GNP growth rate ranging from -5.3%-0%. The Philippines have diplomatic relations with the south east Asian nations, many East Bloc nations, the US, China, Cuba, and the Soviet Union. PMID:12178014

1986-08-01

307

Lombardic Glassworking in Tuscany  

Microsoft Academic Search

The excavations carried out since 2005 at Aiano-Torraccia di Chiusi, near San Gimignano (Siena) in Tuscany, by the team of the Université catholique de Louvain, directed by Prof. Marco Cavalieri, have unearthed the remains of a Roman villa, dated between the 3rd and the end of the 5th century or the beginning of the 6th century A.D. The complex, abandoned

Marco Cavalieri; Alessandra Giumlia-Mair

2009-01-01

308

Committees  

NASA Astrophysics Data System (ADS)

INTERNATIONAL ADVISORY COMMITTEE FOR POSITRON WORKSHOP Roberto S Brusa (Italy) Michael Charlton (UK) Arnab S Ghosh (India) Franco A Gianturco (Italy) Gleb F Gribakin (UK) John Humberston (UK) Helge Knudsen (Denmark) Akos Kover (Hungary) Gaetana Laricchia (UK) Marco AP Lima (Brazil) Allen Mills (USA) Yasuyuki Nagashima (Japan) Clifford M Surko (USA) James Walters (UK) Sandra Ward (USA) LOCAL ORGANIZING COMMITTEE FOR POSITRON WORKSHOP Radu I Campeanu (York, Chairman) Jurij W Darewych (York) Allan D Stauffer (York) Cody Storry (York)

2010-01-01

309

Threshold effects in panel data stochastic frontier models of dairy production in Canada  

Microsoft Academic Search

One of the most enduring problems in econometrics is how to properly account for heterogeneity among firms. Threshold regression models are intuitively appealing methods to deal with this issue. We consider a fixed-effect panel data stochastic frontier model (Schmidt and Sickles, 1984; Martin-Marcos and Suarez-Galvez, 2000) and, relying on Hansen (1999, 2000a), we propose an estimator that accommodates multiple thresholds.

Clément Yélou; Bruno Larue; Kien C. Tran

2010-01-01

310

Threshold Eects In Panel Data Stochastic Frontier Models About Dairy Production In Canada1  

Microsoft Academic Search

Abstract One of the most enduring problems in econometrics is how to properly account for hetero- geneity among individual observations. Threshold regression models are intuitively appealing methods to deal with this issue. We consider a fixed-eects,panel data stochastic frontier model (Schmidt and Sickles (1984), Martin-Marcos and Suarez-Galvez (2000)) and, relying on Hansen (1999, 2000a), we propose an estimator that accommodates

Clement Yelou; Bruno Larue; Kien C. Tran

311

Baseline design of a Mobile Asteroid Surface Scout (MASCOT) for the Hayabusa-2 mission  

Microsoft Academic Search

The Hayabusa-2 mission is currently being studied by JAXA\\/JSPEC as a sample return mis-sion to the C-type near-Earth asteroid 1999JU3. Hayabusa-2, with launch planned for 2014, would be the immediate successor to the currently flying Hayabusa mission. Originally in the context of the proposed ESA Cosmic Vision M-class mission Marco Polo, but then following an invitation by JAXA\\/JSPEC, the Institute

Caroline Lange; Lutz Richter; Tra Mi Ho; Lars Witte

2010-01-01

312

Light scattering observations and simulations, as hints about the media encountered by future rendezvous missions to comets and asteroids  

Microsoft Academic Search

The success of future rendezvous mission to comets (i.e. Rosetta, which will explore the innermost coma of 67P\\/Churyumov-Gerasimenko, before deploying a lander on its nucleus in 2014) and asteroids (e.g. Marco-Polo candidate mission for ESA Cosmic Vision) require some understanding of the physical properties of the dust particles encountered in the coma (if any) and on the solid surface. Analysis

Anny-Chantal Levasseur-Regourd

2008-01-01

313

Mobile Asteroid Surface Scout (MASCOT) - An asteroid lander package for the Hayabusa-2 mission  

Microsoft Academic Search

The Hayabusa-2 mission is currently being studied by JAXA\\/JSPEC as a sample return mission to the C-type near-Earth asteroid 1999JU3. Hayabusa-2, with launch planned for 2014, would be the immediate successor to the currently flying Hayabusa mission. Originally in the context of the proposed ESA Cosmic Vision M-class mission Marco Polo, but then following an invitation by JAXA\\/JSPEC, the Institute

Caroline Lange; Lutz Richter; Claudia Dietze; Tra-Mi Ho; Michael Lange; Tom Sproewitz; Susanne Wagenbach; Olaf Kroemer; Lars Witte; Andy Braukhane

2010-01-01

314

Rocket borne solar eclipse experiment to measure the temperature structure of the solar corona via lyman-. cap alpha. line profile observations  

SciTech Connect

A rocket borne experiment to measure the temperature structure of the inner solar corona via the doppler broadening of the resonance hydrogen Lyman-..cap alpha.. (lambda1216A) radiation scattered by ambient neutral hydrogen atoms was attempted during the 16 Feb 1980 solar eclipse. Two Nike-Black Brant V sounding rockets carrying instrumented payloads were launched into the path of the advancing eclipse umbra from the San Marco satellite launch platform 3 miles off the east coast of Kenya.

Argo, H.V.

1981-01-01

315

Stratigraphic reconstruction of two debris avalanche deposits at Colima Volcano (Mexico): Insights into pre-failure conditions and climate influence  

Microsoft Academic Search

Throughout its history, Colima Volcano has experienced numerous partial edifice collapses with associated emplacement of debris avalanche deposits of contrasting volume, morphology and texture. A detailed stratigraphic study in the south-eastern sector of the volcano allowed the recognition of two debris avalanche deposits, named San Marcos (>28,000calyr BP, V=~1.3km3) and Tonila (15,000–16,000calyr BP, V=~1km3 ). This work sheds light on

M. Roverato; L. Capra; R. Sulpizio; G. Norini

2011-01-01

316

Formation of the Resonant Populations in the Kuiper Belt  

NASA Astrophysics Data System (ADS)

Kuiper belt objects (KBOs) have most of their orbits within a thick disk outside that of Neptune as they are located around heliocentric distances in the range 35-50 AU. On the basis of their orbital elements KBOs can be grouped into distinct dynamical classes, namely the classical, the resonant, and the scattered ones. Resonant KBOs are trapped in mean-motion resonances with Neptune, mainly 3:2 orbital period resonance at 39.4 AU. The same resonance is also occupied by Pluto. In contrast, only a few KBOs are claimed to be associated with the inner 5:4 and 4:3 resonances (34.9 and 36.4 AU, respectively) and the outer 2:1 resonance (47.7 AU). Some other weak resonances are also clearly observed, for instance, 5:3 and 7:3 resonances (42 and 44 AU). Jiang & Yeh (2004, 2007) have proposed gas-drag-induced resonant capture in a protostellar disk analogous to the primordial solar nebula as a mechanism able to explain the dominant 3:2 resonant population observed in Kuiper belt objects. de La Fuente Marcos & de La Fuente Marcos (2008) further investigated the drag-induced mechanism numerically. Our significant contribution is just a hydrodynamic theory derivation of results obtained in Jiang & Yeh (2004, 2007) and de La Fuente Marcos & de La Fuente Marcos (2008) numerical simulations. The possibility of angular momentum and mass transport arising in the solar nebula at outer Lindblad orbital resonances is discussed. We show that the gas-drag-induced resonant process may lead to the formation of relatively narrow, ~ 0.2 AU, KBO rings. The number of KBOs captured into the 3:2 resonance may become a very large fraction of all objects, consistent with the observational results. The work was funded through the Israel Science Foundation, the Israeli Ministry of Immigrant Absorption, and by the Theoretical Institute for Advanced Research in Taiwan.

Griv, E.; Jiang, I.-G.

2009-04-01

317

Poetry and the Brain: Cajals Conjectures on the Psychology of Writers  

Microsoft Academic Search

In 1902, Santiago Ramón y Cajal (1852–1934), the father of modern neuroscience and a 1906 Nobel laureate, contributed a preface to a book of poems by his fellow countryman, Spanish poet and dramatist Marcos Zapata (1844–1914). In that uncustomary—for his neuroscience followers—essay, Cajal unfolds his ideas on the literary genres of drama and comedy in relation to the workings of

Lazaros C. Triarhou; Ana B. Vivas

2009-01-01

318

A quantitative study of the determinants of fertility behavior  

Microsoft Academic Search

\\u000a Resumen  En los últimos años la literatura revela un gran interés en el estudio cuantitativo de los determinantes de la fecundidad.\\u000a Becker presenta bastantes evidencias en un invalorable marco teórico. Mincer provee evidencias e ideas adicionales. Silver\\u000a ha estudiado la respuesta de las tasas de natalidad a los ciclos económicos, para diferentes paises y varios grupos de población\\u000a en Estados Unidos.

Stanley Friedlander; Morris Silver

1967-01-01

319

Water Loss and Viability in Zizania (Poaceae) Seeds During Short-Term Desiccation  

Microsoft Academic Search

How Texas wild rice, Zizania texana, became isolated in the San Marcos River of Central Texas, hundreds of kilometres from other wild rice populations is not known. Zizania seeds are intolerant of short-term desiccation. Seeds desiccated at 14% relative humidity (RH) and 75% RH do not survive after only 5-6 d and 2-3 wk of drying. Water loss is rapid

Francis R. Horne; Ari Kahn

2000-01-01

320

Uhuru (SAS-1/Explorer 42)  

NASA Astrophysics Data System (ADS)

NASA satellite, launched from the San Marco platform off the Kenyan coast in 1970. The first satellite dedicated to x-ray astronomy. Completed an all-sky x-ray survey and studied individual sources. Discovered x-ray binaries, including Hercules X-1 and Centaurus X-1, and confirmed the variability of Cygnus X-1. Uhuru means `freedom' in Swahili. (See also SMALL ASTRONOMY SATELLITE, EXPLORER.)...

Murdin, P.

2000-11-01

321

Knowledge and Technologies' assimilation and transference in the linking among University - Local Government - Population: Case Lacabamba  

Microsoft Academic Search

The Universidad Nacional Mayor de San Marcos and its Research Institute IIGEO, through fulfilling their vision, mission and social responsibility, are co-relating institutional efforts with local governments through framework and specific agreements, such as inthecaseoftheMunicipalityofLacabamba.?Throughthisarticleweshowhowthesharingresearchofamultidisciplinaryand? local population team allowed the carrying out of the agreed strategic planning, the identification of the projects portfolio, citizen's consultancy, participative budget, projects profile, local

Daniel Lovera; Lawrence Quipuzco; Carolina Becerra; Laureano Valentín; Dora Valencia; Aldo Noriega; Daniel Núñez; Helga Valdivia; Janet Montoro; Orlando Ipanaque; Daniel Inciso

322

Ectopic banking of amputated parts: a clinical review.  

PubMed

Since its first clinical description by Marco Godina in 1986, the technique of temporary ectopic banking of amputated parts has been employed in a growing body of reported cases. This installment provides a review of the reported cases in the international literature to date, focusing on our evolving understanding of clinical indications, operative timing, and surgical technical consideration. Two illustrative cases are provided to highlight these concepts. PMID:22036286

Higgins, James P

2011-11-01

323

Water loss and viability in Zizania (Poaceae) seeds during short-term desiccation.  

PubMed

How Texas wild rice, Zizania texana, became isolated in the San Marcos River of Central Texas, hundreds of kilometres from other wild rice populations is not known. Zizania seeds are intolerant of short-term desiccation. Seeds desiccated at 14% relative humidity (RH) and 75% RH do not survive after only 5-6 d and 2-3 wk of drying. Water loss is rapid and reaches a maximum at the time of seed death due to drying. And although all Zizania seeds germinate well following a long, cold dormancy period, Z. texana seeds readily germinate in the isothermic water (22°C) of the San Marcos River and Springs without an obligate, cold dormant period. Within 30-60 d of collection, Z. texana seeds germinate in substantial numbers, unlike seeds of Z. palustris, which require a long, cold dormant period. The Texas population of Z. texana may represent a relict population of a once more widely dispersed wild rice population, since the San Marcos springs probably have never gone dry. PMID:11080122

Horne, F R; Kahn, A

2000-11-01

324

Recognition of Dextran-Superparamagnetic Iron Oxide Nanoparticle Conjugates (Feridex) via Macrophage Scavenger Receptor Charged Domains.  

PubMed

Dextran-coated superparamagnetic iron oxide nanoparticles (dextran-SPIO conjugates) offer the attractive possibility of enhancing MRI imaging sensitivity so that small or diffuse lesions can be detected. However, systemically injected SPIOs are rapidly removed by macrophages. We engineered embryonic cells (HEK293T) to express major macrophage scavenger receptor (SR) subtypes including SR-AI, MARCO, and endothelial receptor collectin-12. These SRs possess a positively charged collagen-like (CL) domain and they promoted SPIO uptake, while the charge neutral lipoprotein receptor SR-BI did not. In silico modeling indicated a positive net charge on the CL domain and a net negative charge on the cysteine-rich (CR) domain of MARCO and SR-AI. In vitro experiments revealed that CR domain deletion in SR-AI boosted uptake of SPIO 3-fold, while deletion of MARCO's CR domain abolished this uptake. These data suggest that future studies might productively focus on the validation and further exploration of SR charge fields in SPIO recognition. PMID:22515422

Chao, Ying; Makale, Milan; Karmali, Priya Prakash; Sharikov, Yuriy; Tsigelny, Igor; Merkulov, Sergei; Kesari, Santosh; Wrasidlo, Wolf; Ruoslahti, Erkki; Simberg, Dmitri

2012-04-26

325

Concept of Operations for Deploying a Lander on the Secondary Body of Binary Asteroid 1996 FG3  

NASA Astrophysics Data System (ADS)

The European Space Agency is currently performing an assessment study of the MarcoPolo-R space mission, in the framework of the M3 class competition of its Cosmic Vision Program. MarcoPolo-R is a sample return mission to a primitive asteroid, whose baseline target is the binary asteroid 1996FG3. The baseline mission, including the sample, is focused on the primary of the binary system. To date, little has yet been considered for the investigation of the secondary, apart from remote observations from the spacecraft. However, MarcoPolo-R may carry an optional lander, and if such a lander could be accommodated it may be relevant to use it for a more detailed investigation of the secondary. This poster presents a strategy for deploying a lander using an unpowered trajectory towards the secondary. This ballistic deployment allows for the design of a light lander with minimum platform overhead and maximum payload. The deployment operations are shown to be very simple and require minimum preparation. The main spacecraft is set on an orbit that reaches a specific point near the binary system L2 Lagrange Point facing the far side of the secondary, about 220 meters from the secondary surface, with a relative speed of about 10cm/s. The lander is then jettisoned using a spring-release mechanism that sets it on an impact trajectory that robustly intersects with the secondary surface. On impact, the lander only needs to dissipate a small amount of kinetic energy in order to ensure that it is energetically and dynamically trapped on the surface. Considering errors on spacecraft GNC and on the spring-release mechanism, and very large uncertainties on the gravity field of the asteroids, the strategy presented here yields a successful landing in more than 99.9% of cases, while ensuring the absolute safety of the spacecraft before, during and after deployment operations.

Tardivel, Simon; Michel, P.; Scheeres, D.

2012-10-01

326

Multi-walled carbon nanotubes injure the plasma membrane of macrophages.  

PubMed

Carbon nanotubes (CNTs) are emerging nanotechnology materials which are likely to be mass-produced in the near future. However, prior to mass-production, certain health-related concerns should first be addressed. For example, when inhaled, the thin-fibrous shape and the biopersistent characteristics of CNTs may cause pulmonary diseases, in a manner similar to asbestos. In the present study, mouse macrophages (J774.1) were exposed to highly-purified multi-walled CNTs (MWCNTs, 67 nm) or to UICC crocidolite in order to evaluate the toxicity of these nano-size fibers. The cytotoxicity of MWCNTs was found to be higher than that of crocidolite. The toxic effect of MWCNTs was not affected by N-acetylcysteine, an antioxidant, or buthionine sulfoximine, a glutathione synthesis inhibitor. cDNA microarray analyses suggested that the cytotoxicity of MWCNTs could not be explained satisfactorily by either an increase or decrease of gene expression, although mRNA levels of some cytokines were slightly increased by MWCNTs. Moreover, MWCNTs did not significantly activate either MAP kinases such as ERK, JNK and p38, nor common apoptosis pathways such as caspase 3 and PARP. Electron microscopic studies indicated that MWCNTs associate with the plasma membrane of macrophages and disrupt the integrity of the membrane. Several proteins were found to adsorb onto MWCNTs when MWCNT-exposed macrophages were gently lysed. One of these proteins was macrophage receptor with collagenous structure (MARCO). MARCO-transfected CHO-K1 cells associated with MWCNTs more rapidly than mock-transfected cells. These results indicate that MWCNTs probably trigger cytotoxic effects in phagocytotic cells by reacting with MARCO on the plasma membrane and rupturing the plasma membrane. PMID:18655803

Hirano, Seishiro; Kanno, Sanae; Furuyama, Akiko

2008-07-03

327

The case of the machinists' mutiny.  

PubMed

"You can't be serious!" Mike Trail, the president and fourth-generation owner of Trail Manufacturing, stared at five older men standing in his office. "I'm afraid we are, Mike." Sandy, the most senior of the five, was polite but firm. "We won't switch over to the new equipment." Trail Manufacturing was a small Midwestern company trying to define itself in a new world of competition. Working with engineering chief Marco Duncan, Mike Trail, its young CEO, developed a program to revolutionize the company's manufacturing capability by installing six computerized machining centers. The $4 million automation program was proceeding smoothly, or at least it seemed to be, until the sixth of eight production teams, whose members included the company's most respected machinist, refused to continue participating. Mike canvased his colleagues for suggestions. "We can't let any screw machines remain in operation," Marco insisted. "The problem wasn't just old machines. The problem was--and is--the whole company. We need a clean break with the past." Shop manager Darrell Montgomery didn't necessarily disagree, but he worried about alienating Sandy. "You know what Sandy means to this place," he said. "If it wasn't for him, we never would have survived the startup." Bob Block, the company's CFO, went a step further. He questioned Marco's all-or-nothing vision and counseled compromise. "With half the new cells up, the screw machines are running a lot fewer jobs," he noted. "But they still account for over half our sales and even more of our profits. Maybe these guys are right." Four experts on change examine the crisis at Trail Manufacturing and debate Mike Trail's next step. PMID:10107958

Chew, W B

328

Multi-walled carbon nanotubes injure the plasma membrane of macrophages  

SciTech Connect

Carbon nanotubes (CNTs) are emerging nanotechnology materials which are likely to be mass-produced in the near future. However, prior to mass-production, certain health-related concerns should first be addressed. For example, when inhaled, the thin-fibrous shape and the biopersistent characteristics of CNTs may cause pulmonary diseases, in a manner similar to asbestos. In the present study, mouse macrophages (J774.1) were exposed to highly-purified multi-walled CNTs (MWCNTs, 67 nm) or to UICC crocidolite in order to evaluate the toxicity of these nano-size fibers. The cytotoxicity of MWCNTs was found to be higher than that of crocidolite. The toxic effect of MWCNTs was not affected by N-acetylcysteine, an antioxidant, or buthionine sulfoximine, a glutathione synthesis inhibitor. cDNA microarray analyses suggested that the cytotoxicity of MWCNTs could not be explained satisfactorily by either an increase or decrease of gene expression, although mRNA levels of some cytokines were slightly increased by MWCNTs. Moreover, MWCNTs did not significantly activate either MAP kinases such as ERK, JNK and p38, nor common apoptosis pathways such as caspase 3 and PARP. Electron microscopic studies indicated that MWCNTs associate with the plasma membrane of macrophages and disrupt the integrity of the membrane. Several proteins were found to adsorb onto MWCNTs when MWCNT-exposed macrophages were gently lysed. One of these proteins was macrophage receptor with collagenous structure (MARCO). MARCO-transfected CHO-K1 cells associated with MWCNTs more rapidly than mock-transfected cells. These results indicate that MWCNTs probably trigger cytotoxic effects in phagocytotic cells by reacting with MARCO on the plasma membrane and rupturing the plasma membrane.

Hirano, Seishiro [Environmental Nanotoxicology Section, RCER, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 (Japan)], E-mail: seishiro@nies.go.jp; Kanno, Sanae; Furuyama, Akiko [Environmental Nanotoxicology Section, RCER, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 (Japan)

2008-10-15

329

The Mexican Hydra: How Calderón's Pursuit of Peace Led to the Bloodiest War in Mexican History? Will the Mexican People Inherit a Failed State in 2012?  

Microsoft Academic Search

THE MEXICAN HYDRA: HOW CALDERÓN’S PURSUIT OF PEACE LED TO THE BLOODIEST WAR IN MEXICAN HISTORY. WILL THE MEXICAN PEOPLE INHERIT A FAILED STATE IN 2012?\\u000aAbstract\\u000a \\u000aMarco Antonio Pinon-Farah\\u000aThe drug-war in Mexico (2006-present) has accelerated at a chilling rate, claiming the lives of 35,000 Mexican people. Since President Felipe Calderón assumed office, Mexico has been battling an internal

Marco A Pinon-Farah

2011-01-01

330

Spent filter packaging for long term storage and disposal  

SciTech Connect

This paper will discuss filter packaging experience using spent filter transfer casks, a filter shear and the NUKEM macro-encapsulation process. Marco-encapsulation of spent filters in cement has provided sufficient shielding to enable filter containers to be shipped in less expensive IP-2 casks. The lower dose rate and higher density also off-sets disposal rates at Barnwell based on mass. No re-dewatering of encapsulated filter containers is required after a period of long term storage and encapsulation eliminates the possibility of gas generation from filters during storage. Encapsulation can be performed on filters loaded into poly HICs or carbon steel liners. (authors)

Duberville, T.M. [NUKEM Corporation, Columbia, SC (United States); Miller, C. [Pacific Gas and Electric, Diablo Canyon Power Plant, Avila Bach, CA (United States)

2007-07-01

331

RSV 2007: Recent Advances in Respiratory Syncytial Virus Research  

PubMed Central

Abstract The Sixth International Respiratory Syncytial Virus (RSV) Symposium was held from October 25 through October 28, 2007 in Marco Island, Florida. During this conference, over 200 students and investigators representing 16 countries convened to present and discuss recent advancements in RSV research. Presentations ranged from bench to bedside studies encompassing aspects of basic virology, pathogenesis, and immunology, as well as therapeutic and vaccine designs. In total, there were 12 invited speakers and 36 oral presentations divided into six sessions. Additionally, there were two posters sessions displaying more than one hundred abstracts. The following summary provides a review of the proceedings from each session.

Stevens, Whitney W.; Falsey, Ann R.

2008-01-01

332

Aula Verde: art as experience in community-based environmental education.  

PubMed

After winning a class-action lawsuit against unconstitutional prison conditions in Puerto Rico, Marco Abarca managed to direct part of the fine monies accumulated throughout years of litigation toward an investment that would improve the living conditions in one of the largest and poorest housing projects in Puerto Rico. With the participation of parolees and probationers, he began to transform a mosquito-infested badland into a natural haven. Then, with the help of science educators, the group designed a workshop for elementary school children on urban ecology. As the participants organized, what developed was a community-based, self-employed enterprise known as Aula Verde. PMID:20391620

Abarca, Marco A

2010-01-01

333

Anthropology Tutorials  

NSDL National Science Digital Library

Dr. Dennis O'Neil of Palomar College (San Marcos, California) has developed sixteen informative online tutorials for the study of anthropology at the university level. The tutorials offer an introduction and an overview of key concepts, theories, and methodologies in physical (biological) and cultural (social) anthropology. Each multi-part tutorial provides a table of contents, an interactive practice quiz, a glossary of anthropological terms, and pointers to related Internet information resources. Some of the tutorials also include data tables, illustrations, maps, and chronologies.

O'Neil, Dennis.

1997-01-01

334

Cover image, volume 34, issue 31.  

PubMed

By following the scheme of the grid empowered molecular simulator (GEMS), Leonardo Pacifici, Marco Verdicchio, Noelia Faginas Lago, Andrea Lombardi, and Alessandro Costantini on page 2668 calculate an extended set of high-level abinitio electronic energy values. The calculated values are fitted using a many-body expansion technique and a full-dimensional N2 + N2 potential energy surface (PES), also allowing the N atom exchange to be produced. Plots of the obtained PES show the change of the intermediate geometry from reactants to products. PMID:24155077

2013-12-01

335

Shock wave properties of anorthosite and gabbro  

NASA Astrophysics Data System (ADS)

Huyoniot data on San Gabriel anorthosite and San Marcos gabbro to 11 GPA are presented. Release paths in the stress-density plane and sound velocities are reported as determined from partial velocity data. Electrical interference effects precluded the determination of accurate release paths for the gabbro. Because of the loss of shear strength in the shocked state, the plastic behavior exhibited by anorthosite indicates that calculations of energy partitioning due to impact onto planetary surfaces based on elastic-plastic models may underestimate the amount of internal energy deposited in the impacted surface material.

Boslough, M. B.; Ahrens, T. J.

1985-08-01

336

Effects of magnetic-storm phases on F-layer irregularities from auroral to equatorial latitudes. Quarterly report, 1 Oct-31 Dec 90  

SciTech Connect

Partial Contents: The effects of electric field and ring current energy increases on F-layer irregularities at auroral and sub-auroral latitudes; The role of the ring current in generating or inhibiting equatorial F-layer irregularities during magnetic storms; Auroral and sub-auroral F-layer irregularities and high plasma convection during the magnetically active periods of September 17-24, 1984; and Simultaneous All-Sky Optical Airglow Imaging Observations and San Marco Satellite Measurements in the Pacific Sector.

Aarons, J.; Mendillo, M.

1990-12-31

337

RETRACTED: Coated graphite-epoxy ion-selective electrode for the determination of chromium(III) in oxalic medium.  

PubMed

This article has been retracted at the request of the Talanta Editors-in-Chief. Reason: After publication this article was discovered to have been plagiarized from an earlier work by Orlando Fatibello-Filho, Marcos Fernando de Souza Teixeira, Alexandre Zambon Pinto, presented in their paper 'Coated graphite-epoxy ion-selective electrode for the determination of iron(III) in oxalic medium', published in Analytical Letters 30 (1997) 417-427. We very much regret this error, and offer our apologies to Professor Fatibello-Filho and his co-workers. J-M. Kauffmann G.D. Christian Editors-in-Chief. PMID:18969432

Khalil, S; Wassel, A A; Belal, F F

2004-05-28

338

Frank Lloyd Wright: Designs for an American Landscape, 1922-1932  

NSDL National Science Digital Library

The US Library of Congress has recently made parts of this exhibition (November 14, 1996 - February 15, 1997) available at its web site. It includes an overview and introduction, along with text and graphic information on five of the great architect's projects (none of which was ever realized): Gordon Strong Automobile Objective, Lake Tahoe Summer Colony, Doheny Ranch Development, A. M. Johnson Desert Compound, and San Marcos in the Desert. Each of these projects explored "advanced building technologies and untried geometric patterns" that attempted to integrate architecture and environment. The site is a fascinating glimpse at an architect who was far ahead of his time, and perhaps ahead of ours as well.

1996-01-01

339

Impact induced damage beneath craters  

NASA Astrophysics Data System (ADS)

Ackermann et al. (1975) described the subsurface structure of Meteor Crater and identified a fractured rock zone extending to about 1 km deep. The depth of the fractured/damage zone can be used to extract information about the impact cratering process. We impacted rock samples (San Marcos gabbro) in the laboratory and imaged the damage structure using both dicing and tomography methods. We propose a simple model to describe the damage zone depth based on the laboratory measurements. The model agrees well with other methods for the estimation of the projectile size of Meteor Crater and it may be used for estimates of damage around craters of other planets and moons.

Xia, Kaiwen; Ahrens, Thomas J.

340

Discordant paleomagnetic data for middle-Cretaceous intrusive rocks from northern Baja California: Latitude displacement, tilt, or vertical axis rotation?  

NASA Astrophysics Data System (ADS)

Paleomagnetic results and U/Pb zircon dating from the San Marcos dike swarm and the El Testerazo pluton in the Cretaceous Peninsular Ranges batholith of northern Baja California are used to evaluate alternative pre-Neogene paleogeographic reconstructions of the Baja California peninsula. The San Marcos dike swarm is a dense, northwest striking, regional dike swarm that is exposed over an ˜100 km long segment of the batholith and has yielded a U/Pb zircon crystallization age of 120 ± 1 Ma. Dike attitudes from the swarm suggest a regionally consistent average ˜320°E strike and ˜79°NE dip. The El Testerazo pluton is a younger tonalite intrusion that truncates the northern end of the dike swarm. All but one of 36 sites sampled in this study show remanence of normal polarity. Paleopoles for the San Marcos dike swarm and El Testerazo pluton are indistinguishable and were combined into a paleopole at 248.1°E, 86.6°N, A95 = 4.8°, which is displaced with respect to the 122 Ma reference pole for stable North America at 198.2°E, 72.3°N, A95 = 3.3°. The displacement may be described by an apparent clockwise rotation of 18° ± 6° and an apparent northward shift of 8° ± 5°. Restoring a northward shift of about 3°, related to the separation of Baja California from North America since 10 Ma, only a marginal northward displacement of 5° ± 5° is left. The clockwise rotation may be the result of crustal block rotations within the right-lateral shear systems in northern Baja California, although there is no geological evidence that supports this possibility. Alternatively, the difference between paleopole and reference pole may be due to tilting of the study area. Restoring a northeastward tilt of 11°, based on the mean dip measured for the San Marcos dike swarm in the study area, yields a paleopole at 187.6°E, 70.8°N, A95 = 5.6°, which is indistinguishable from the 122 Ma North American reference pole. The tilting hypothesis suggested previously as a potential explanation for low inclination of paleomagnetic data from Baja California therefore seems to be viable for the discordant paleopoles from this segment of the batholith. Data obtained previously about 150 km further south and along the western edge of the batholith defined a concordant paleopole without any tilt correction, indicating that regional tilting may not be valid for all of Baja California.

BöHnel, Harald; Delgado-Argote, Luis A.; Kimbrough, David L.

2002-10-01

341

Impact spallation experiments - Fracture patterns and spall velocities  

SciTech Connect

The spall velocities produced by nine experimental impacts of 1 to 6.5 km/sec into San Marcos gabbro targets, using projectiles of Fe, Al, Pb, and basalt of various sizes, have been measured in conjunction with fragment-velocity high-speed filmings of the events. A detailed comparison is made between measured spall velocities and those predicted by the model of Melosh (1984), with a view to the compatibility of small-scale results and large planetary impacts. Attention is also given to the patterns of internal fracture generated by impact within the targets. 29 refs.

Polanskey, C.A.; Ahrens, T.J. (JPL, Pasadena, CA (USA) California Institute of Technology, Pasadena (USA))

1990-09-01

342

Creating a Successful Summer Physics Camp  

NASA Astrophysics Data System (ADS)

The summer physics camp hosted by the Texas State University San Marcos Society of Physics Students chapter is geared toward middle school children aged 9 to 12 years. Camp administrators aim to create an environment that is both conducive to learning and fun. Our overarching goal is to provide local youth a basic knowledge of physical concepts as well as encourage their continued interest in physics. Physical concepts are taught through a combination of short lectures, group activities, and entertaining demonstrations. This presentation will discuss the basic curriculum, activities and demonstrations that have been performed in past camps, as well as plans for future curricula and expansions.

Gregory, Amanda

2009-10-01

343

Austin Chalk boundaries bigger than Texas  

SciTech Connect

The Austin Chalk is a carbonate limestone which has major outcropping near Austin, Texas. Around Austin, San Antonio, and San Marcos it finds its major expression in the so-called Balcones Escarpment, a jutting limestone promontory that divides the Texas hill country from the Black Gumbo Farmland to the east, and forms one of the longest, most noticeable geologic features in the state. The Chalk is known to run through the entire Gulf Coast Littoral - Louisiana, Mississippi, and Alabama. A map shows the locations of the major uplifts, downwarps, fault zones, and tectonic belts in the Austin Chalk play.

Calhoun, J.

1980-11-01

344

Visual Photometry from CCD Observations of the Nova V1178 SCO  

NASA Astrophysics Data System (ADS)

In this poster we present some observations of the Nova V1178 Sco made with camera CCD coupled to a telescope MEADE of 8 inches, the obtained results are in agreement with other observations carried out by stars' variables observers' groups. We also show mainly the work that we come carrying out for the construction and implementation of a small astronomical observatory for the university of San Marcos in Lima, Peru. The place of the future observatory this located at 4 hours of the city of the Cuzco and a height of approximately 4.000 about of sea level.

Carlos, R.

345

User Satisfaction with Costar V  

PubMed Central

COSTAR V (COmputer-STored Ambulatory Record) is a computer-based medical information system designed to replace the document-based medical record with a centralized and integrated information system that serves the clinical, administrative and educational needs of a practice. It is an operational system being demonstrated at nine sites nationwide. Two of these sites at Baltimore, Maryland and San Marcos, California are federally funded demonstrations of the public domain COSTAR V. In this paper, the author examines user satisfaction with COSTAR V in light of design objectives of its developers, and problems in the installation, transition and operational phases of the system. The observations and conclusions are drawn from field experience gained during these two site installations and from communications with the developers and installers at other major sites. This work was performed under the auspices of The MITRE Corporation which is providing technical assistance to North County Health Services, San Marcos, California under a grant from the Health Underserved Rural Areas Program of the Bureau of Community Health Services, DHEW.

Kerlin, Barbara D.

1979-01-01

346

Dynamics and History of Mars Trojans  

NASA Astrophysics Data System (ADS)

Mars is the only terrestrial planet known to have long-term stable Trojan coorbitals. Recently, Christou (2013) and De la Fuente Marcos & De la Fuente Marcos (2013) have shown that several smaller Mars Trojans belong to a dynamical cluster centered on (5261) Eureka. While some of non-cluster Mars Trojans have colors distinct from Eureka (Rivkin et al. 2007), it is not clear if the cluster itself is compositionally homogeneous. Given that cluster member orbits should diverge over the age of the Solar System (Scholl et al. 2005), a recent origin of the cluster is likely. Our preliminary work indicates that the cluster could not have been formed through the slow dissipation of the Yarkovsky effect, in agreement with past results of Fleming & Hamilton (2000). Hence, our current expectation is that the cluster is collisional, and we expect to present an estimate of the age of the cluster at the meeting, based on long-term integrations of the cluster's dynamical diffusion. We will also discuss possible origin scenarios for Mars Trojans. It is now known that the Mars-crosser population was significantly larger in the past (Cuk 2012), and some Mars-crossers can spend time as temporary Trojans. Mechanisms of temporary Trojan stabilization include dynamical chaos and collisions (with some fragments of temporary Trojans becoming long-term stable). These and other routes will be tested using analytical arguments and numerical simulations. This work is supported by NASA PGG award NNX12AO41G.

Cuk, Matija; Hamilton, D. P.

2013-10-01

347

Horizontal drilling in the Austin Chalk: Stratigraphic factors  

SciTech Connect

Horizontal drilling has renewed interest in the Austin chalk in south-central Texas. Large fields on opposite sides of the San Marcos arch Giddings to the northeast and Pearsall to the southwest were active with vertical drilling 10 years ago. Giddings' 4,500 Austin wells produced 209 million BO and 934 bcfg of gas through 1988; Pearsall's 1,440 wells produced 57 million BO and 35 bcfg of gas. Most vertical wells were completed, 20% were economic successes, 40% were marginal, 40% were uneconomic due to uneven areal distribution of near-vertical fractures and small faults, which provide reservoirs in otherwise tight chalk. Horizontal drilling, led by Amoco in Giddings and Oryx in Pearsall, enhances the chances of encountering the fractures by drilling perpendicular to the fracture trend. Horizontal drilling requires preselection of the stratigraphic horizon to be penetrated. One must understand the variable Austin stratigraphy to choose the zone with the most brittle character and best matrix porosity, both reduced by increased clay content. Chalk 130 ft thick on the San Marcos arch thickens to 600 to 800 ft in central Giddings field where middle marl separates lower and upper chalk Northeastward only lower chalk is preserved beneath a post-Austin submarine channel. The Austin thickens to 300-500 ft in Pearsall field where middle member ash beds separate lower and upper chalk inhibiting vertical reservoir communication. Locally, on the Pearsall arch, ash is missing, lower chalk thickens, and upper chalk thins.

Durham, C.O. Jr. (Durham Geological Associates, Houston, TX (USA)); Bobigian, R.A. (Fleet Petroleum Partners, Houston, TX (USA))

1990-05-01

348

Assimilation of global-scale and mesoscale electric fields from low-latitude satellites  

NASA Astrophysics Data System (ADS)

Equatorial satellites can measure key drivers of the low-latitude ionosphere globally and frequently. The electric field and plasma drift instruments of the Communications and Navigation Outage System satellite will provide redundant observations of the most important driver of low-latitude ionosphere structure, that is, the zonal electric field and resulting E × B plasma drift. The electric field data from the San Marco D satellite have been reduced to E × B plasma drift equivalents and are used to, first, examine data ingestion into an ionosphere model for weather sensitive specifications of the ionosphere and, second, explore use of the mesoscale (<1000 km) features in the E × B plasma drift to forecast the spatial mapping of signal scintillation associated with equatorial spread F in the postsunset ionosphere. The ingestion of the global-scale, satellite-based plasma drift observations into an ionosphere model improves electron density specifications over climatology when results are compared with the satellite in situ electron density measurements. Examination of the presunset and postsunset passes of the San Marco D satellite over a specific longitude sector suggests that the mesoscale structure in the zonal electric field can be used to predict the position and spacing of large plasma plumes associated with equatorial spread F in the postsunset ionosphere. A presunset forecast of the postsunset spatial location of plasma plumes can be used to spatially refine forecast maps of signal scintillation.

Eccles, J. Vincent

2004-02-01

349

Mapa Geologico de Venezuela a Escala 1:750,000  

USGS Publications Warehouse

Se presenta un mapa geologico digital de Venezuela sobre un fondo de relieve sombreado. Los datos geologicos e hidrologicos del norte del rio Orinoco proceden de la digitalizacion de mapas geologicos en papel a escala 1:500.000. Estos datos fueron integrados con el mapa geologico digital del Escudo de Guayana Venezolano, a su vez derivado de hojas en papel a escala 1:500.000. La informacion sobre los tipos de fallas mostrados en el mapa es igual que en las fuentes originales. Los poligonos geologicos fueron atribuidos por edad, litologia y nombre de la unidad siguiendo el Codigo geologico de Venezuela. Se incorporaron revisiones significativas de la geologia de la Cordillera de la Costa a partir de las nuevas hojas integradas a escala 1:25.000. Toda esta informacion geologico-estructural se sobrepuso a una imagen de relieve sombreado, producida por el procesamiento de los datos de radar interferometrico con 90 m (3 arcosegundos) de resolucion espacial obtenidos por la mision topografica de radar del transbordador espacial (SRTM). Las areas de la base de datos del SRTM carentes de informacion fueron llenadas por medio de la interpolacion de los datos de las celdas adyacentes. Para producir la imagen de relieve sombreado se uso una direccion de iluminacion de 315 deg con un angulo de 65 deg sobre el horizonte. La proyeccion usada en el mapa es conica equidistante, con latitudes de 4 y 9 deg norte como paralelos estandar y una longitud de 66 deg al oeste como meridiano central. Los datos en el mapa proceden primordialment de hojas a escala 1:500.000 y el producto esta preparado para una impresion optima en escala 1:750.000. Los usuarios pueden obtener ampliaciones mayores, sin embargo no se garantiza la precision del mapa a escalas mas detalladas. Especialmente en la region de Guayana, al sobreponer los mapas geologicos sobre la reciente imagen SRTM, se notan grandes discrepancias no sistematicas tanto en contactos como en fallas. Esto es debido a que los mapas geologicos de Guayana tienen como base topografica las imagenes de radar de vision lateral (SLAR), con muy control de campo de los a?os 1970's. La correccion de estos desfases esta planificada para el futuro.

Hackley, Paul C.; Urbani, Franco; Karlsen, Alex W.; Garrity, Christopher P.

2006-01-01

350

BIO?TICA EN NICARAGUA  

PubMed Central

Este trabajo describe la situación de la bioética en Nicaragua, caracterizando las circunstancias y el contexto de las actividades de educación médica y las unidades prestadoras de servicios de salud. El desarrollo de un nuevo modelo de atención integral en salud, la implementación de políticas de salud que garanticen a la población el mayor acceso y gratuidad a los servicios, y los cambios acontecidos en los cuidados médicos, debidos en parte al reconocimiento creciente de una mayor autonomía de los pacientes y al uso creciente de nuevas tecnologías médicas, hace que se presenten algunas limitantes y dilemas en las unidades asistenciales y entre el personal de salud. La bioética en Nicaragua tiene un desarrollo incipiente: no está institucionalizada ni se han previsto los mecanismos formales que permitan resolver los problemas éticamente complejos, por lo tanto, constituye un gran reto por parte de las instituciones educativas y rectoras de la salud.

Gonzalezy, Armando Ulloa; Monge, Melba de la Cruz Barrantes

2009-01-01

351

A study of the Civic Tower in Ravenna as an example of medieval towers' preservation problems  

NASA Astrophysics Data System (ADS)

Structuralstabilityis a major item when considering very high masonry buildings made of stones, bricks, etc., that can start sudden structural failures and collapses, often without any obvious signs of warning. A famous example is the collapse of the belfry of the Basilica of San Marco in Venice --the implementation of it began in the ninth century-- which took place in July 1902 a few days after the appearanceof a fissure. This paper discusses the scientific investigation performed on the Torre Civica (Civic Tower) in Ravenna (North-East Italy), in order to characterize its constituent materials, namely bricks and mortar. All this information and relevant data merge in a multimedia database which will help to design appropriate conservation and restoration works, mainly concerning the reconstruction of the apical part of the tower, that was foreshortened ten years ago for safety reasons, starting from the original materials catalogued and preserved up to the present day.

Bruni, Stefania; Maino, Giuseppe; Marrocchino, Elena; Vaccaro, Carmela; Volpe, Lisa

2013-03-01

352

Statistical panorama of female physics graduate students for 2000-2010 in Peru  

NASA Astrophysics Data System (ADS)

We report the results of a statistical study on the number of women entering the undergraduate and master's programs of physics at Universidad Nacional Mayor de San Marcos in Peru. From 2006 through 2010, 13 female students entered the master's degree program but no females graduated with the degree. Considering that Peru is a developing country, a career in physics is not considered an attractive professional choice even for male students because it is thought that there are no work centers to practice this profession. We recommend that the causes preventing female physics students from completing their studies and research work be analyzed, and that strategies be planned to help women complete their academic work. We are considering getting help from the Peruvian Physics Society (SOPERFI) in order to draw more attention for our plan.

Cerón Loayza, María Luisa; Bravo Cabrejos, Jorge Aurelio

2013-03-01

353

Astronomía en la cultura  

NASA Astrophysics Data System (ADS)

La Astronomía en la Cultura es el estudio interdisciplinario a nivel global de la astronomía prehistórica, antigua y tradicional, en el marco de su contexto cultural. Esta disciplina abarca cualquier tipo de estudios o líneas de investigación en que se relacione a la astronomía con las ciencias humanas o sociales. En ella se incluyen tanto fuentes escritas, relatos orales como fuentes arqueológicas, abarcando entre otros, los siguientes temas: calendarios, observación práctica, cultos y mitos, representación simbólica de eventos, conceptos y objetos astronómicos, orientación astronómica de tumbas, templos, santuarios y centros urbanos, cosmología tradicional y la aplicación ceremonial de tradiciones astronómicas, la propia historia de la astronomía y la etnoastronomía (Krupp, 1989) (Iwaniszewski, 1994). En nuestro trabajo abordamos la historia y situación actual de esta disciplina, sus métodos y sus relaciones con otras áreas de investigación.

López, A.; Giménez Benitez, S.; Fernández, L.

354

Some properties of an infinite family of deformations of the harmonic oscillator  

SciTech Connect

In memory of Marcos Moshinsky, who promoted the algebraic study of the harmonic oscillator, some results recently obtained on an infinite family of deformations of such a system are reviewed. This set, which was introduced by Tremblay, Turbiner, and Winternitz, consists in some Hamiltonians H{sub k} on the plane, depending on a positive real parameter k. Two algebraic extensions of H{sub k} are described. The first one, based on the elements of the dihedral group D{sub 2k} and a Dunkl operator formalism, provides a convenient tool to prove the superintegrability of H{sub k} for odd integer k. The second one, employing two pairs of fermionic operators, leads to a supersymmetric extension of H{sub k} of the same kind as the familiar Freedman and Mende super-Calogero model. Some connection between both extensions is also outlined.

Quesne, Christiane [Physique Nucleaire Theorique et Physique Mathematique, Universite Libre de Bruxelles, Campus de la Plaine CP229, Boulevard du Triomphe, B-1050 Brussels (Belgium)

2010-12-23

355

[The unicorn and the unicorn horn among apothecaries and physicians].  

PubMed

In the 4th century A.D. the first unicorn was shown as a little horse with a twisted horn and was completely different from the Oriental one described by Marco Polo. The new unicorn appeared during the 4th century A.D. in Alexandria. This animal enamoured of purity was used as a Christian symbol of purity and sacrifice and adornment of churches like in Lyons in the 13th century. In the 15th & 17th centuries the unicorn was found again in famous tapestries like La Dame B la Licorne as it meant courage, speed and purity. Since the 6th century the powder of unicorn horn was used as a medicine or a drug against poisoning. Depictions of unicorn can be found in chemist's signs, engravings or paintings until the 19th century. PMID:22073757

Fischer, Louis-Paul; Cossu Ferra Fischer, Véronique

356

Surface elements and landing strategies for small bodies missions - Philae and beyond  

NASA Astrophysics Data System (ADS)

The investigation of small bodies, comets and asteroids, can contribute substantially to our understanding of the formation and history of the Solar System. In-situ observations by Landers play a prominent role in this field. The Rosetta Lander - Philae - is currently on its way to comet 67P/Churyumov-Gerasimenko. It will land in November 2014 and perform numerous experiments with a suite of 10 scientific instruments. Philae has been designed to cope with a wide range of possible comet properties. The considerations taken during its development are relevant for future Lander missions to small bodies in the Solar System. In addition the paper provides a review of alternative concepts, studied or developed for various missions like Phobos, Hayabusa/Minerva or Géocroiseur/Leonard. Various missions to small bodies in the Solar System, including Landers, are currently studied (e.g., Marco Polo). The paper will address the mission options and compare applicable technologies with the solutions chosen for Philae.

Ulamec, Stephan; Biele, Jens

2009-10-01

357

(Hydroelectric project in Costa Rican rural electric generation and transmission)  

SciTech Connect

On November 6, 1989, I left for San Jose, Costa Rica. My visit was set to accomplish two activities. The first activity was a follow-on mission to gather additional information on a newly identified small hydroelectric project, in support of a rural electric generation and transmission cooperative performed for the Renewable Energy Applications and Training project. Data on stream flows, soils, geologic, and topographic information was gathered for Rio San Lorenzo, near Quesada. A reconnaissance level survey was performed for Rio Naranjillo, a river near San Marcos. The second part of the visit was dedicated to interaction with ICE, the electric utility, discussing plans to establish a comprehensive efficiency program in Costa Rica. I returned to Oak Ridge on November 16, 1989.

Waddle, D.B.

1989-11-28

358

Calculation of Phonon Dispersion and Thermal Conductivity in Carbon Nanotubes  

NASA Astrophysics Data System (ADS)

Many potential applications of carbon nanotubes in nanoelectronic circuits rely on effective removing of excess heat from the device active area. Heat in carbon nanotubes is mostly carried by acoustic phonons. In this work we have calculated phonon dispersion in carbon nanotubes using atomistic approach. The phonon dispersion was then used to calculate phonon density of states, heat capacitance and thermal conductivity. The thermal conductivity has been determined using the modified Callaway -- Klemens approach, which accounts for the low-dimensional size effects [1]. The results of our calculations are compared with the experimental Raman spectroscopic study of carbon nanotubes and reported values of the thermal conductivity. The authors acknowledge the support of MARCO and its Functional Engineered Nano Architectonics (FENA) Focus Center. [1] A.A. Balandin, Thermal Conductivity of Semiconductor Nanostructures, in Encyclopedia of Nanoscience and Nanotechnology (ASP, Los Angeles, 2004) p. 425.

Varshney, Mayank

2005-03-01

359

Barahona Center for the Study of Books in Spanish for Children and Adolescents  

NSDL National Science Digital Library

Readers interested in children's books in Spanish can visit this site provided by Isabel Schon of California State University, San Marcos, to browse and search versions of "recommended books in Spanish for children and adolescents published around the world." The database, at present, contains bibliographic information on over 3,000 books that have been selected for "quality of art and writing, presentation of material, and appeal to the intended audience." It can be searched by any of thirteen fields, or browsed by author or title. Each bibliographic item contains a short description, along with information on whether the book was reviewed in any of the numerous books Ms. Schon has written on the topic.

Schon, Isabel.

360

Origin of arches in the northwestern Gulf of Mexico basin  

SciTech Connect

The San Marcos and Sabine arches are prominent north- to northwest-trending basement uplifts in the northwestern Gulf of Mexico basin that may be late Mesozoic to Cenozoic foreland or intraplate folds rather than domes over plutons or buoyant basement blocks. These arches are subparallel to and contemporaneous with orogenic episodes in the northwest-trending fold-thrust belt of Mexico. Arch movement was also contemporaneous with rapid convergence between the North American and Pacific plates. Arch development in the gulf as a result of tectonic compression is plausible in view of increasing recognition of wide zones of foreland and intraplate deformation in continents. Current tectonic models of the development of the gulf inaccurately predict gradual, decelerating subsidence when these arches were most active.

Laubach, S.E.; Jackson, M.L.W. (Univ. of Texas, Austin (USA))

1990-07-01

361

Acknowledgements  

NASA Astrophysics Data System (ADS)

Ackowledgement logos The organizers of the Young Researchers' Meeting in Rome would like to thank all the scientists who participated in the meetings. We thank the Universities of Roma "Tor Vergata" and "La Sapienza" for hosting the first two editions of the conference, and the Physics and Astronomy Doctoral Schools of "La Sapienza" for sponsoring the 2nd meeting. We are grateful to Prof. Roberto Capuzzo-Dolcetta (Univ. "La Sapienza"), Prof. Enzo Marinari (Univ. "La Sapienza"), Prof. Pasquale Mazzotta (Univ. "Tor Vergata"), Prof. Giancarlo Ruocco (Univ. "La Sapienza"), Sig.ra Fernanda Lupinacci (Univ. "La Sapienza"), Dott. Marco Veneziani (Lessico Intellettuale Europeo-CNR), Dott.sa Rossella Cossu (Istituto per le Applicazioni del Calcolo-CNR) and Dott. Paolo Cabella (University of Rome "Tor Vergata") for logistical and technical support, and useful discussions. Conference photographs

2011-02-01

362

La historia orbital de Deimos y la oblicuidad de Marte  

NASA Astrophysics Data System (ADS)

Recientemente, se ha demostrado mediante extensas integraciones numéricas, que la rotación de Marte pasó repetidamente por estados caóticos de movimiento, debido al pasaje por zonas de resonancia spin - órbita. En dichas circunstancias, la oblicuidad marciana pudo haber sufrido grandes excursiones de varias decenas de grados. Las consecuencias de dichas variaciones son de extrema importancia en el contexto de la búsqueda de manifestaciones de vida fósil en dicho planeta. El estudio de la dinámica orbital del satélite más exterior de Marte, Deimos, nos ha permitido comprobar, en el marco de las distintas teorías sobre su orígen, que la oblicuidad de Marte dificilmente pudo haber sufrido variaciones que la aparten más de 10o respecto de actual valor. Este resultado parece ser mucho más robusto que las simulaciones numéricas de Touma y Wisdom asi como las de Laskar y Robutel, lo que permite poner cotas más severas a la evolución paleoclimática de Marte.

Brunini, A.; Yokoyama, T.

363

Removal of Collagen Nerve Conduits (NeuraGen) after Unsuccessful Implantation: Focus on Histological Findings.  

PubMed

Nerve conduits are nonneural, hollow tubular structures designed to bridge the gap of a sectioned nerve, to protect the nerve from scar formation, and to guide the regenerating fibers into the distal nerve stump. In the 8-year experience of our department, four patients aged 14 to 50 years had an unsuccessful implantation of a nerve conduit (NeuraGen, Integra, Plainsboro, NJ). In these four patients, the collagen tubes were replaced by an autogenous nerve graft. The histological specimens showed characteristic histological findings of a scar neuroma without any signs of foreign body reaction in three cases and with minimal foreign body reaction in one case. The collagen nerve tube was completely resorbed in all cases after a time period of 6 to 17 months and could not be detected marco- or microscopically.To our knowledge, this is the first report in the English and German literature describing the histological characteristics of explanted collagen nerve tubes in humans. PMID:23818251

Liodaki, Eirini; Bos, Inge; Lohmeyer, Joern A; Senyaman, Oezge; Mauss, Karl Ludwig; Siemers, Frank; Mailaender, Peter; Stang, Felix

2013-07-01

364

Archiving Student Solutions with Tablet PCs in a Discussion-based Introductory Physics Class  

NASA Astrophysics Data System (ADS)

Many active learning based physics courses use whiteboards as a space for groups to respond to prompts based on short lab activities, problem solving, or inquiry-oriented activities. Whiteboards are volatile; once erased, the material is lost. Tablet PCs and software such as Ubiquitous Presenter can be used as digital whiteboards in active learning classes. This enables automatic capture and archiving of student work for online review by students, instructors, and researchers. We studied the use of digital whiteboards in an active-learning introductory physics course at California State University, San Marcos. In this paper we examine the archival features of digital whiteboards', and characterize the use of these features by students and instructors, and explore possible uses for researchers and curriculum developers.

Price, Edward; de Leone, Charles

2008-10-01

365

International Program and Local Organizing Committees  

NASA Astrophysics Data System (ADS)

International Program Committee Dionisio Bermejo (Spain) Roman Ciurylo (Poland) Elisabeth Dalimier (France) Alexander Devdariani (Russia) Milan S Dimitrijevic (Serbia) Robert Gamache (USA) Marco A Gigosos (Spain) Motoshi Goto (Japan) Magnus Gustafsson (Sweden) Jean-Michel Hartmann (France) Carlos Iglesias (USA) John Kielkopf (USA) John C Lewis (Canada) Valery Lisitsa (Russia) Eugene Oks (USA) Christian G Parigger (USA) Gillian Peach (UK) Adriana Predoi-Cross (Canada) Roland Stamm (Germany) Local Organizing Committee Nikolay G Skvortsov (Chair, St Petersburg State University) Evgenii B Aleksandrov (Ioffe Physico-Technical Institute, St Petersburg) Vadim A Alekseev (Scientific Secretary, St Petersburg State University) Sergey F Boureiko (St.Petersburg State University) Yury N Gnedin (Pulkovo Observatory, St Petersburg) Alexander Z Devdariani (Deputy Chair, St Petersburg State University) Alexander P Kouzov (Deputy Chair, St Petersburg State University) Nikolay A Timofeev (St Petersburg State University)

2012-12-01

366

Messages about the Messengers: Reception and Review of ``Astronomy's New Messengers,'' The Laser Interferometer Gravitational-wave Observatory's Interactive Public Exhibition  

NASA Astrophysics Data System (ADS)

The Laser Interferometer Gravitational-wave Observatory (LIGO) is an endeavor to directly confirm the existence of gravitational waves, funded by the National Science Foundation. As a publicly funded research project, it is both within its directive and within its best interest to educate and inform the public at large of its efforts. The Education and Public Outreach (EPO) group within LIGO, under the direction of Marco Cavaglià, has developed an interactive exhibit to educate, explain and showcase LIGO to the general public. The exhibit, entitled ``Astronomy's New Messengers,'' debuted at the World Science Festival in New York City, and includes features to explain gravitational waves and their possible sources, an interferometer, the space-time fabric model, and the difficulties in identifying a gravitational wave. The exhibit visitors were asked to complete a survey about their experience at ``Astronomy's New Messengers,'' and the presentation will report the survey results, and explore the full exhibit's reception by the general public.

Rankins, Brooke; Cavagliá, Marco

2010-10-01

367

Thickness and field dependence of the driven dynamic mode-splitting of magnetic vortices  

NASA Astrophysics Data System (ADS)

We have explored the effects of increased driving field amplitude on the dynamics of magnetic vortices using a microwave reflection technique and found that the vortex translational eigenmode profile first takes on a distorted shape and then splits into two well-defined peaks as the field is increased [1]. Here we examine the thickness and field dependence of this mode-splitting phenomenon via measurements of lithographically patterned micron-sized Permalloy ellipses with thicknesses of 20, 40, and 60 nm. The experimental results will be compared to numerical calculations that incorporate a critical velocity parameter and provide new insight into the origin of the observed vortex dynamic mode splitting. Acknowledgments: Thank you to Marcos Grimsditch, Frank Fradin, Sam Bader, and Val Novosad for stimulating discussions. [1] Buchanan et al. PRL 99,267201 (2007).

Buchanan, Kristen

2009-03-01

368

Graphical representations of vector functions in upper-division E&M  

NSDL National Science Digital Library

In upper division electricity and magnetism, the manipulation and interpretation of vector functions is pervasive and a significant challenge to students. At CSU San Marcos, using in-class activities adapted from the Oregon State University Paradigms in Physics Curriculum, studentsâ difficulties with vector functions become evident in two types of in-class activities: sketching vector functions and relating vector and scalar functions (e.g., electric field and electric potential). For many students, the cause of these difficulties is a failure to fully distinguish between the components of a vector function and its coordinate variables. To address this difficulty, we implement an additional in-class activity requiring students to translate between graphical and algebraic representations of vector functions. We present our experience with these issues, how to address them, and how in-class activities can provide evidence of student thinking that facilitates curricular refinement.

Gire, Elizabeth; Price, Edward

2012-05-15

369

Recognition of a middle Eocene unconformity in Transverse Ranges, utilizing satellite imagery and high-altitude photography  

SciTech Connect

Integration of satellite imagery and high-altitude photography with ground observations has helped document the existence of an unconformity in uppermost Eocene rocks in the Transverse Ranges of California. The surface is expressed locally as an angular unconformity that can be mapped from the western Transverse Ranges near Gaviota Gorge to Matilija Hot Springs north of Ojai, California. This unconformity separates the Gaviota Formation from the Sacate Formation in the western Transverse Ranges and exists within the Coldwater Formation from San Marcos Pass to Matilija Hot Springs. Rocks below the unconformity are variable in age, but are generally older near Matilija Hot Springs than on the west near Gaviota Gorge. This indicates greater truncation below the unconformity to the east, in a direction up the paleoslope. This unconformity formed about 39.5 Ma and coincides with a sequence boundary and lowstand of sea level interpreted from middle Eocene sections elsewhere.

Campion, K.M.; Morgan, S.R.; Berger, Z.

1988-03-01

370

The Wittliff Collection  

NSDL National Science Digital Library

Founded at Texas State University-San Marcos by Austin screenwriter and photographer Bill Wittliff and his wife Sally, the Wittliff Collections bring together "the Southwest's literature, film, and music." Visitors to the website can share in all of these cultural wonders, including materials from the Southwestern Writers Collection and several extensive photography collections. First-time visitors should head on over to "The Collections" area to take in the travel narrative of Cabeza de Vaca, found in the Southwestern Writers Collection "Research and Archives", and a wonderful tribute to the TV series and book, "Lonesome Dove". Moving on, the "Exhibitions & Events" area contains information about their various traveling exhibits, events, and writer talks. The site is rounded out by an online gift store and more details about their book series and anthologies of Southwestern writers.

371

Graphical representations of vector functions in upper-division E&M  

NASA Astrophysics Data System (ADS)

In upper division electricity and magnetism, the manipulation and interpretation of vector functions is pervasive and a significant challenge to students. At CSU San Marcos, using in-class activities adapted from the Oregon State University Paradigms in Physics Curriculum, students' difficulties with vector functions become evident in two types of in-class activities: sketching vector functions and relating vector and scalar functions (e.g., electric field and electric potential). For many students, the cause of these difficulties is a failure to fully distinguish between the components of a vector function and its coordinate variables. To address this difficulty, we implement an additional inclass activity requiring students to translate between graphical and algebraic representations of vector functions. We present our experience with these issues, how to address them, and how in-class activities can provide evidence of student thinking that facilitates curricular refinement.

Gire, Elizabeth; Price, Edward

2012-02-01

372

Toward Understanding Student Conceptions of the Photoelectric Effect  

NASA Astrophysics Data System (ADS)

The photoelectric effect is part of a group of phenomena that provide the experimental basis for the photon model of light. Most students pursuing a degree in physics or a related field first study the photoelectric effect and the photon model of light in a ``modern physics'' course following directly after the introductory physics sequence. It has been documented that many students have trouble understanding the photoelectric effect itself, and its connection to the photon model of light. In an attempt to better understand student preconceptions and misconceptions of this topic, we conducted a study of students in a modern physics class at California State University, San Marcos. In this paper we will provide preliminary results of our research with specific emphasis on the knowledge base required to understand the photoelectric effect.

de Leone, Charles J.; Oberem, Graham E.

2004-09-01

373

Regional variations in formation water chemistry, Frio Formation (Oligocene), Texas Gulf Coast  

SciTech Connect

Overpressured Oligocene sandstones in Texas contain water having salinities ranging from approximately 8,000 to more than 250,000 mg/L. Water composition varies with depth and amount four hydrochemical subregions. Water dominated by NaCl and having variable but locally high salinity occurs within the salt-dome province of the Houston embayment, whereas NaCl-dominated water with generally lower salinity and high concentrations of organic acids occurs along the San Marcos arch. A unique area of highly saline Ca-rich water in south Texas is separated by abrupt boundaries from the middle coast water to the north and from an area of low salinity NaCl water near the Rio Grande. Boundaries between hydrochemical subregions may reflect deep-seated structural discontinuities that regionally control fluid movement along faults and within sandstone-rich intervals. 11 figs., 2 tabs.

Morton, R.A.; Land, L.S. (Univ. of Texas, Austin (USA))

1987-02-01

374

[Depressive symptomatology and alcohol-related problems during the academic training of medical students].  

PubMed

In order to evaluate the frequency of depressive symptomatology (DS) and alcohol-related problems (ARP) during the academic training of medical students from Universidad Nacional Mayor de San Marcos, a cross-sectional study was conducted among students from first to sixth year of career. The Zung Self-Rating depression scale was used to evaluate DS and the CAGE questionnaire to evaluate ARP. 23.3% of participants had DS, and 7.3% had ARP. We found that the frequency of DS and ARP was higher among students in the first years of career. We recommend it is necessary to take action in the prevention and detection of these disorders from the first years of training of medical students. PMID:23612813

Valle, Rubén; Sánchez, Elard; Perales, Alberto

2013-03-01

375

The Future of Physics in the Undergraduate Education of Biologists: Beyond the Algebra Based Course  

NASA Astrophysics Data System (ADS)

The success of quantitative and computational methods of research in the biological sciences has incited calls for change in the undergraduate biological sciences curriculum. This reevaluation of the biology curriculum presents physicists with an opportunity to rethink and rebuild service courses such as the introductory algebra based physics course. Beyond the one-year introductory course, some of the more ambitious curricular reforms include calls for a third semester of physics for students who plan on doing biomedical research. This talk will briefly explore the open question of how we can best serve the evolving needs of our colleagues in biology by considering the calls for change in the biology curriculum such as BIO 2010 and reviewing the current state of the introductory physics course for biologists. In addition, this talk will review the successes and failures of research based courses such as the introductory calculus-based physics course for biologists at Cal State San Marcos.

de Leone, Charles

2005-03-01

376

Ground-coupled heat pumps projects Austin Independent School District  

SciTech Connect

Austin Independent School District was introduced to the closed loop concept in 1985 during or after the time that Goodnight Junior High School in San Marcos geothermal heat pump system was installed. The first project was a joint effort of an equipment manufacturer, a pipe extruder, a distributor, an HVAC contractor and the school district. This was a trial for this new system. The two leading factors which contributed to the decision to go geothermal, were that the tower on the building was already at capacity and a reduced price was offered on the first installation. The school district owns every type, make, model, configuration, style and paint color of heating and cooling equipment made. They were ready for anything that would give them relief.

Cadwallader, R.A. [Loop Tech International, Huntsville, TX (United States)

1994-03-01

377

Wave-like Fluctuations of The Total Neutral Density of Amplitude Increasing With Altitude In The Upper Thermosphere  

NASA Astrophysics Data System (ADS)

The study of the high resolution total neutral density measurements of the San Marco V satellite revealed also wave-like fluctuations of the density of amplitude increas- ing with height above a given height. The height at which the amplitude of these fluctuations begins to increase has been found to occur in the height range 300-500 km. Analysis of this phenomenon indicated that this height displays a diurnal varia- tion lower heights occurring by day. On the basis of this findings it is assumed that fluctuations of amplitude increasing with height found in the total neutral density are due to convective instability related to the quasi isothermal state of this part of the thermosphere. Under these conditions an infinitesimal disturbance is enough for the development of instability.

Bencze, P.; Illés-Almár, E.; Almár, I.

378

Newly discovered Wolf-Rayet and weak emission-line central stars of planetary nebulae  

NASA Astrophysics Data System (ADS)

We present the spectra of 32 previously unpublished confirmed and candidate Wolf-Rayet ([WR]) and weak emission-line (WELS) central stars of planetary nebulae (CSPNe). 18 stars have been discovered in the Macquarie/AAO/Strasbourg H? (MASH) PN survey sample, and we have also uncovered 14 confirmed and candidate [WR]s and WELS among the CSPNe of previously known PNe. Spectral classifications have been undertaken using both Acker & Neiner and Crowther, De Marco & Barlow schemes. 22 members in this sample are identified as probable [WR]s; the remaining 10 appear to be WELS. Observations undertaken as part of the MASH spectroscopic survey have now increased the number of known [WR]s by ˜30 per cent. This will permit a better analysis of [WR] subclass distribution, metallicity effects and evolutionary sequences in these uncommon objects.

Depew, K.; Parker, Q. A.; Miszalski, B.; De Marco, O.; Frew, D. J.; Acker, A.; Kovacevic, A. V.; Sharp, R. G.

2011-07-01

379

Colorado Upper Division Electrostatics (CUE) Assessment  

NSDL National Science Digital Library

The Colorado Upper Division Electrostatics (CUE) Asssessment is designed to test student understanding of core learning goals in junior-level E&M. It consists of a 17-item open-ended test with optional 9-item pretest. The test has good inter-rater reliability and has been validated using multiple measures. The test provided here is version 22 of the CUE which was attached as Appendix B to the article: Stephanie V. Chasteen, Rachel E. Pepper, Marcos D. Caballero, Steven J. Pollock, and Katherine K. Perkins, Colorado Upper-Division Electrostatics diagnostic: A conceptual assessment for the junior level, Phys. Rev. ST Phys. Educ. Res. 8 (2), 020108 (2012), doi:10.1103/PhysRevSTPER.8.020108. To receive a copy of the most recent version of the test to use in your course, contact Steven Pollock at steven.pollock@colorado.edu.

Pollock, Steven J.; Chasteen, Stephanie V.

2013-05-28

380

Moving Image Source  

NSDL National Science Digital Library

If you enjoy films, you will probably be delighted to learn about the Moving Image Source website. Created by the people at the Museum of the Moving Image, the site contains interviews and articles with film critics, filmmakers, and other commentators. The site contains four primary areas: "Articles", "Calendar", "Dialogues", and "Research Guide." The "Articles" area contains guided tours through Jean-Luc Godard's "Film Socialisme", the virtual visions of Marco Brambilla, and the many faces of Catherine Deneuve. The archives of these articles date back to 2008, and visitors can also search this collection by author. The "Dialogues" area contains audio files of conversations with film figures like Michael Caine, Amy Ryan, Terry Gilliam, and David O. Russell. The site is rounded out by the "Research Guide" area, which includes helpful links to sites that deal with film criticism, scoring, history, and technology.

381

Space systems technology; Proceedings of the Aerospace Congress and Exposition, Long Beach, CA, October 15-18, 1984  

SciTech Connect

Various papers on space system technology are presented. The topics discussed include: gallium arsenide solar cell vapor phase technology, liquid phase epitaxial GaAs solar cells, the San Marco Mission solar array, autonomous solar arrays for the future, application of viscous and inviscid computation methods for rocket turbopump systems, solar dynamic power for a space station, a two-phase thermal management system for the space station, and the effect of bipropellant thruster contaminant on solar array performance. Also considered are: uprated orbital maneuvering engine, pump-fed satellite delivery stage engine technology, lox/hydrocarbon propellants for space propulsion systems, refurbishment of the Space Shuttle solid rocket motor, NASA's approach to flight confidence, diagnostic needs of the Space Shuttle main engine, reusable rocket engine turbopump condition monitoring, Space Shuttle mission extension capability, advanced launch vehicles, and the Space Shuttle main engine overhaul program.

Not Available

1984-01-01

382

Wireless data communication alternatives for small public safety agencies: how one community cost-effectively solved its expanding field data requirements  

NASA Astrophysics Data System (ADS)

A growing number of Public Safety agencies have begun leveraging wireless data communication technology to improve tactical response capabilities as well as overall productivity. For years police departments subscribed to CDPD (Cellular Digital Packet Data) services to provide officers with basic dispatch data and criminal database access. Now as cellular carriers have deactivated CDPD and shifted to 2.5G and 3G data services such as 1xRTT, GPRS and EDGE, police departments are scrambling to fill the void. Not surprisingly, the extraordinary investments cellular carriers made to upgrade their infrastructures have been transferred to the customer, with monthly fees running as high as $80 a month per user. It's no wonder public safety agencies have been reluctant to adopt these services. Lost in the fray are those smaller police departments which account for nearly 90% of the nation's total. This group has increasingly sought out alternative data communication solutions that are not predicated on budget-busting monthly access fees. One such example is the Marco Island Police Department (MIPD) in Southwestern Florida that received a Federal grant to augment its existing voice communications with data. After evaluating several different technologies and vendors, MIPD chose a 900 MHz ad hoc mesh network solution based on its ability to provide reliable, high-speed and secure IP-based data communications over extensive distances. This paper will discuss technical details of Marco Island's mobile mesh network implementation; including: coverage area with 900 MHz spread spectrum radios, strategic repeater tower placement, interference, throughput performance, and the necessity for application-persistence software.

Canning, Ryan M.; Lefebvre, Eric

2005-06-01

383

THERMAP: a mid-infrared spectro-imager based on an uncooled micro-bolometer for space missions to small bodies of the solar system  

NASA Astrophysics Data System (ADS)

We report on the feasibility study of a mid-infrared (8-18 µm) spectro-imager called THERMAP, based on an uncooled micro-bolometer detector array. Due to the recent technological development of these detectors, which have undergone significant improvements in the last decade, we wanted to test their performances for the Marco Polo R ESA Cosmic Vision mission. In this study, we demonstrate that the new generation of uncooled micro-bolometer detectors has all the imaging and spectroscopic capabilities to fulfill the scientific objectives of this mission. In order to test the imaging capabilities of the detector, we set up an experiment based on a 640x480 ULIS micro-bolometer array, a germanium objective and a black body. Using the results of this experiment, we show that calibrated radiometric images can be obtained down to at least 255 K (lower limit of our experiment), and that two calibration points are sufficient to determine the absolute scene temperature with an accuracy better than 1.5 K. Adding flux attenuating neutral density mid-infrared filters (transmittance: 50%, 10%, 1%) to our experiment, we were able to evaluate the spectroscopic performances of the detector. Our results show that we can perform spectroscopic measurements in the wavelength range 8-16 µm with a spectral resolution of R~40-80 for a scene temperature <300 K, the typical surface temperature of a Near Earth Asteroid at 1 AU from the Sun. The mid-infrared spectro-imager THERMAP, based on the above detector, is therefore well suited for the Marco Polo R mission.

Brageot, E.; Groussin, O.; Lamy, P.; Reynaud, J.-L.; Fargant, G.; Licandro, J.; Helbert, J.; Knollenberg, J.; Kührt, E.

2012-09-01

384

Differential gene expression in non-malignant tumour microenvironment is associated with outcome in follicular lymphoma patients treated with rituximab and CHOP.  

PubMed

Rituximab in combination with chemotherapy (immunochemotherapy) is one of the most effective treatments available for follicular lymphoma (FL). This study aimed to determine whether differences in gene expression in FL tissue correlate with outcome in response to rituximab and CHOP (cyclophosphamide, doxorubicin, vincristine, prednisone) chemotherapy (R-CHOP). We divided 24 patients into long- [time to treatment failure (TTF) >35 months] and short-term (TTF <23 months) responders, and analysed the gene expression profiles of lymphoma tissue using oligonucleotide microarrays. We used a supervised learning technique to identify genes correlating with outcome, and confirmed the expression of selected genes with quantitative polymerase chain reaction (qPCR) and immunohistochemistry. Among the transcripts with a high correlation between microarray and qPCR analyses, we identified EPHA1, a tyrosine kinase involved in transepithelial migration, SMAD1, a transcription factor and a mediator of bone morphogenetic protein and transforming growth factor-beta signalling, and MARCO, a scavenger receptor on macrophages. According to Kaplan-Meier estimates, high EPHA1, and low SMAD1 and MARCO expression were associated with better progression-free survival (PFS). Immunohistochemistry showed that EphA1 was primarily localised in granulocytes. In addition, both EphA1 and Smad1 were expressed in vascular endothelia. However, no difference in vasculature was detected between long- and short-term responders. In a validation set of 40 patients, a trend towards a better PFS was observed among patients with high EphA1 expression. We conclude that gene expression in non-malignant cells contributes to clinical outcome in R-CHOP-treated FL patients. PMID:16925574

Harjunpää, Antti; Taskinen, Minna; Nykter, Matti; Karjalainen-Lindsberg, Marja-Liisa; Nyman, Heidi; Monni, Outi; Hemmer, Samuli; Yli-Harja, Olli; Hautaniemi, Sampsa; Meri, Seppo; Leppä, Sirpa

2006-08-22

385

Depositional systems distribution of the lower Oligocene Vicksburg Formation, TX  

SciTech Connect

The lower Oligocene Vicksburg Formation of Texas is situated between the upper Eocene Jackson Group and the upper Oligocene Frio Formation. The paleogeography of the Texas Gulf coastal plain during the early Oligocene is typical of a progradational passive continental margin. However, a detailed regional depositional systems analysis of stratigraphic units, such as the Vicksburg, within a mature petroleum basin can yield results beneficial in both exploration and development. Stratigraphic plays are determined from the distribution of depositional systems, and reservoir characteristics are heavily influenced by conditions of sedimentation. Two primary depocenters (and exploration fairways) of the Texas Vicksburg were the Houston Embayment and the Rio Grande Embayment; they were separated by a deep-rooted structural nose in central Texas: the San Marcos arch. Within the embayments, deltaic depositional systems merged along strike with barrier/strand plain systems. Updip, fluvial systems traversed coastal plain units. On the seaward edge of the paralic systems, sand and mud deposits prograded across, and built up over, the relict Jackson shelf and shelf margin. Contemporaneous growth faulting controlled deltaic depositional patterns in the Rio Grande Embayment and, to a lesser degree, in the Houston Embayment. A barrier/strand plain system within an interdeltaic coastal bight extended across the northern flank of the San Marcos arch. Several minor wave-dominated delta complexes were interspersed within this regional setting. The southern flank of the arch was influenced by the fluvial systems of the Rio Grande Embayment that established another wave-dominated delta. Deposition of the Vicksburg progradational paralic sediments was initiated seaward of the Jackson coastal position. A brief, minor transgression interrupted the progradational pattern during middle Vicksburg deposition.

Coleman, J.; Galloway, W.E. (Univ. of Texas, Austin (USA))

1990-05-01

386

In the Footsteps of Roger Revelle: Seagoing Oceanography for Middle School Science  

NASA Astrophysics Data System (ADS)

Now in its fourth year, "In the Footsteps of Roger Revelle" (IFRR) is a middle school science education program that draws student interest, scientific content and coherence with National Science Standards from real-time research at sea in fields of physical science. As a successful collaboration involving Scripps Institution of Oceanography (SIO), Woods Hole Oceanographic Institution (WHOI), National Oceanic and Atmospheric Administration (NOAA), Office of Naval Research (ONR), National Science Foundation (NSF), San Diego County Office of Education (SDCOE), and San Marcos Middle School (SMMS), IFRR brings physical oceanography and related sciences to students at the San Marcos Middle School in real-time from research vessels at sea using SIO's HiSeasNet satellite communication system. With their science teacher on the ship as an education outreach specialist or ashore guiding students in their interactions with selected scientists at sea, students observe shipboard research being carried out live via videoconference, daily e-mails, interviews, digital whiteboard sessions, and web interaction. Students then research, design, develop, deploy, and field-test their own data-collecting physical oceanography instruments in their classroom. The online interactive curriculum encourages active inquiry with intellectually stimulating problem-solving, enabling students to gain critical insight and skill while investigating some of the most provocative questions of our time, and seeing scientists as role- models. Recent science test scores with IFRR students have shown significant increases in classes where this curriculum has been implemented as compared to other classes where the traditional curriculum has been used. IFRR has provided students in the San Diego area with a unique opportunity for learning about oceanographic research, which could inspire students to become oceanographers or at least scientifically literate citizens - a benefit for a country that depends increasingly on technically proficient personnel, and a benefit for society at large.

Brice, D.; Foley, S.; Knox, R. A.; Mauricio, P.

2007-12-01

387

The Vicksburg Formation of Texas: Depositional systems distribution, sequence stratigraphy, and petroleum geology  

SciTech Connect

The lower Oligocene Vicksburg Formation of the Gulf Coastal plain contains major petroleum reservoirs in the Rio Grande embayment and is an economically viable target in other areas of Texas. Knowledge of the distribution of Vicksburg depositional systems is essential to understanding sandstone concentrations and, therefore, is fundamental to effective exploration and production of the Vicksburg section. The depositional setting of the Vicksburg reservoirs, their position in a sequence stratigraphic framework, and the influence these factors have on the petroleum geology of the Vicksburg are the focus of this paper. Surface and subsurface geological and geophysical data provided the framework for an analysis of the depositional systems and the petroleum geology of the Vicksburg. The two primary Texas Vicksburg depocenters, the Rio Grande embayment and the Houston embayment, are separated by the San Marcos arch, a deep-rooted structural nose. Within the embayments, sand-rich deltaic complexes merged along strike with barrier/strand plains. Contemporaneous growth faulting controlled depositional patterns of shelf-edge deltas in the Rio Grande embayment, but had only a minor effect on the configuration of the shelfal deltas in the Houston embayment. Smaller wave-dominated shelf delta complexes interspersed with barrier/strand plains extended across the San Marcos arch. Updip of these sandy paralic depocenters, fluvial systems traversed mud-rich coastal plain units. Seaward of the paralic systems, sand and mud deposits prograded across and built up over the relict Jackson shelf and shelf-margin shales. These depositional complexes are contained in the systems tracts of one eustatic (Exxon) sequence. Vicksburg production from each of the three structural regions of Texas is characterized by reservoirs from different systems tracts and of distinct, different depositional origins.

Combes, J.M. (Amoco Production Co., Tulsa, OK (United States))

1993-11-01

388

Dynamic Tensile Strength of Crustal Rocks and Application to Impact Cratering  

NASA Astrophysics Data System (ADS)

Dynamic tensile strengths of two crustal rocks, San Marcos gabbro and Coconino sandstone (Meteor Crater, Arizona), were determined by carrying out flat plate impact experiments. Porosity of San Marcos gabbro is very low, and the reported porosity for Coconino sandstone is approx. 25%. Aluminum flyer plates were used for gabbro with impact velocities of 13 to 50 m/s, which produce tensile stresses in the range of 120 to 450 MPa. PMMA flyer plates were used for sandstone with impact velocities of 5 to 25 m/s, resulting tensile stresses in the range of approx. 13 to 55 MPa. Impact was normal to the bedding of sandstone. Tensile duration times for two cases were approx. 1 and approx. 2.3 microns, respectively. Pre-shot and post-shot ultrasonic P and S wave velocities were measured for the targets. Velocity reduction for gabbro occurred at approx. 150 MPa, very close to the earlier result determined by microscopic examination. The reduction of S wave is slightly higher than that of P wave. This indicates that the impact-induced cracks were either aligned, or there were residual fluids within cracks, or both. Data for sandstone velocity reduction was few and scattered caused by its high porosity. The range of dynamic tensile strength of Coconino sandstone is within 25 and 30 MPa. Obvious radial cracks at certain stresses indicate that deformation was not restricted to one dimensional strain as being assumed. Spall fragmentation occurred above 40 MPa. The combination of impact velocities, U (km/s), and impactor radii, a0)(m, are constrained by Meteor Crater fracture depth, approx. 850 m, and the dynamic tensile fracture strength from our experiments, 40 MPa. Volume of the crater for each impact was calculated using V = 0.009mU1.65, where V is crater volume (cu m), m is the mass of the impactor (kg). Volume of impact with U = 28 km/s, a0 = 10 m is close to the real Meteor Crater volume, 7.6e7 cu m. Impact energy for this case is 3.08 Mt., which agrees well with theoretical calculation (3.3 to 7.4 Mt.).(1 Mt. = 4.18e 15J).

Ai, H.; Ahrens, T. J.

2003-01-01

389

PREFACE: DISCRETE 2010: Symposium on Prospects in the Physics of Discrete Symmetries  

NASA Astrophysics Data System (ADS)

The Symposium DISCRETE2010 on Prospects in the Physics of Discrete Symmetries was held at the Sapienza Universitàa di Roma, Italy from 6-11 December 2010. This second edition, after the successful one in Valencia in 2008, covered all theoretical and experimental progress in the field, and aimed at a thorough discussion on the latest developments. The topics covered included: T, C, P, CP symmetries; accidental symmetries (B, L conservation); CPT symmetry, decoherence, Lorentz symmetry breaking; neutrino mass and mixing; cosmology and astroparticles, dark matter searches; experimental prospects at LHC, Super flavor factories, and new facilities. The Symposium was organized in plenary sessions with a total of 23 invited talks, and parallel sessions with a total of 80 talks including both invited and selected contributions from the submitted abstracts. The speakers of the plenary sessions were: Achille Stocchi, Andreas Weiler, Kevin Pitts, Tim Gershon, Marco Sozzi, Neal Weiner, Vasiliki Mitsou, Bernard Sadoulet, Gianfranco Bertone, J. Eric Grove, Mauro Mezzetto, Alexei Yu Smirnov, Oliviero Cremonesi, Antonio Riotto, Reno Mandolesi, Brett Altschul, Jose Bernabeu, Lawrence Hall, Marco Grassi, Yannis K. Semertzidis, Riccardo Barbieri, Gigi Rolandi, Luciano Maiani. The Symposium venue was the CNR (Consiglio Nazionale delle Ricerche) headquarter building, close to the Sapienza University. At the end of the Symposium a special open session, devoted to a wider audience, was held at the Pontifical University of the Holy Cross, in the historical center of Rome. The symposium was attended by about 140 participants, about half coming from Italy, and the rest mainly from other European countries and United States. Among the social events was a concert at the Aula Magna of the Sapienza University, and a social dinner in the historical Palazzo Pallavicini-Rospigliosi on the Quirinale Hill. The next symposium of the series will be organised by IST, Universidade Tàecnica de Lisboa, Portugal, from 3 to 7 December 2012. Roma, November 2011 The Editors Antonio Di Domenico Cesare Bini Caterina Bloise Fabio Bossi Riccardo Faccini Paolo Gauzzi Gino Isidori Paolo Lipari Lucio Ludovici Luca Silvestrini The PDF file also contains committee, secretariat, sponsor and participant lists, plus the conference poster and photograph.

Di Domenico, Antonio; Bini, Cesare; Bloise, Caterina; Bossi, Fabio; Faccini, Riccardo; Gauzzi, Paolo; Isidori, Gino; Lipari, Paolo; Ludovici, Lucio; Silvestrini, Luca

2011-12-01

390

A Genetic Cluster of Martian Trojan Asteroids  

NASA Astrophysics Data System (ADS)

Trojan asteroids lead 60 degrees ahead (L4) or trail 60 degrees behind (L5) a planet's position along its orbit. The Trojans of Jupiter and Neptune are thought to be primordial remnants from the solar system's early evolution (Shoemaker et al., 1989; Sheppard et al., 2006). Mars is the only terrestrial planet known to host stable Trojans (Scholl et al., 2005) with ~50 km-sized objects expected to exist (Tabachnik and Evans, 1999). I identified 6 additional candidate Martian Trojans within the Minor Planet Center database, including three with multi-opposition orbits. 100 dynamical clones for each of the three asteroids were integrated for 100 Myr under a force model that included the Yarkovsky effect. All clones persisted as L5 Trojans of Mars, implying that their residence time is longer still. This is further supported by recent Gyr numerical integrations (de la Fuente Marcos and de la Fuente Marcos, 2013). The number of stable Martian Trojans is thus raised to 7, 6 of which are at L5. To investigate this asymmetry, I apply a clustering test to their orbits and compare them with the Trojan population of Jupiter. I find that, while Jupiter Trojans are spread throughout the domain where long-term stability is expected, L5 martian Trojans are far more concentrated. The implication is that these objects may be genetically related to each other and to the largest member of the group, 5261 Eureka. If so, it represents the closest such group to the Earth's orbit, still recognizable due to the absence of planetary close encounters which quickly scatter NEO families (Schunova et al., 2012). I explore the origin and nature of this `Eureka cluster', including the thesis that its members are products of the collisional fragmentation and/or rotational fission of Trojan progenitors. I constrain the cluster's age under these scenarios and argue that collisions may be responsible for the observed paucity of km-sized objects. Finally, I discuss how the hypothesis of a genetic association may be further scrutinized by new models and observations. Astronomical Research at Armagh Observatory is funded by the Northern Ireland Department of Culture, Arts and Leisure (DCAL).

Christou, Apostolos

2013-10-01

391

Using Geophysics to Define Hydrostratigraphic Units in the Edwards and Trinity Aquifers, Texas  

NASA Astrophysics Data System (ADS)

Airborne and ground geophysical surveys conducted in Uvalde, Medina, and northern Bexar counties, Texas, can be used to define and characterize hydrostratigraphic units of the Edwards and Trinity aquifers. Airborne magnetic surveys have defined numerous Cretaceous intrusive stocks and laccoliths, mainly in Uvalde County, that influence local hydrology and perhaps regional ground-water flow paths. Depositional environments in the aquifers can be classified as shallow water platforms (San Marcos Platform, Edwards Group), shoal and reef facies (Devils River Trend, Devils River Formation), and deeper water basins (Maverick Basin, West Nueces, McKnight, and Salmon Peak Formations). Detailed airborne and ground electromagnetic surveys have been conducted over the Edwards aquifer catchment zone (exposed Trinity aquifer rocks), recharge zone (exposed Edwards aquifer rocks), and artesian zone (confined Edwards) in the Seco Creek area (northeast Uvalde and Medina Counties; Devils River Trend). These geophysical survey data have been used to divide the Edwards exposed within the Balcones fault zone into upper and lower hydrostratigraphic units. Although both units are high electrical resistivity, the upper unit has slightly lower resistivity than the lower unit. The Georgetown Formation, at the top of the Edwards Group has a moderate resistivity. The formations that comprise the upper confining units to the Edwards aquifer rocks have varying resistivities. The Eagleford and Del Rio Groups (mainly clays) have very low resistivities and are excellent electrical marker beds in the Seco Creek area. The Buda Limestone is characterized by high resistivities. Moderate resistivities characterize the Austin Group rocks (mainly chalk). The older Trinity aquifer, underlying the Edwards aquifer rocks, is characterized by less limestone (electrically resistive or low conductivity units) and greater quantities of mudstones (electrically conductive or low resistivity units). In the western area (Devils River Trend and Maverick Basin) of the Trinity aquifer system there are well-defined collapse units and features that are marked by moderate resistivities bracketed by resistive limestone and conductive mudstone of the Glen Rose Limestone. In the central part of the aquifer (San Marcos Platform) the Trinity's lithologies are divided into upper and lower units with further subdivisions into hydrostratigraphic units. These hydrostratigraphic units are well mapped by an airborne electromagnetic survey in Bexar County. Electrical properties of the Edwards aquifer also vary across the fresh-saline water interface where ground and borehole electrical surveys have been conducted. The saline- saturated Edwards is predictably more conductive than the fresh-water saturated rocks. Similar fresh-saline water interfaces exist within the upper confining units of the Edwards aquifer (Carrizo-Wilcox aquifer) and the Trinity aquifer rocks.

Smith, B. D.; Blome, C. D.; Clark, A. K.; Kress, W.; Smith, D. V.

2007-05-01

392

Shock-induced damage in rocks: Application to impact cratering  

NASA Astrophysics Data System (ADS)

Shock-induced damage beneath impact craters is studied in this work. Two representative terrestrial rocks, San Marcos granite and Bedford limestone, are chosen as test target. Impacts into the rock targets with different combinations of projectile material, size, impact angle, and impact velocity are carried out at cm scale in the laboratory. Shock-induced damage and fracturing would cause large-scale compressional wave velocity reduction in the recovered target beneath the impact crater. The shock-induced damage is measured by mapping the compressional wave velocity reduction in the recovered target. A cm scale nondestructive tomography technique is developed for this purpose. This technique is proved to be effective in mapping the damage in San Marcos granite, and the inverted velocity profile is in very good agreement with the result from dicing method and cut open directly. Both compressional velocity and attenuation are measured in three orthogonal directions on cubes prepared from one granite target impacted by a lead bullet at 1200 m/s. Anisotropy is observed from both results, but the attenuation seems to be a more useful parameter than acoustic velocity in studying orientation of cracks. Our experiments indicate that the shock-induced damage is a function of impact conditions including projectile type and size, impact velocity, and target properties. Combined with other crater phenomena such as crater diameter, depth, ejecta, etc., shock-induced damage would be used as an important yet not well recognized constraint for impact history. The shock-induced damage is also calculated numerically to be compared with the experiments for a few representative shots. The Johnson-Holmquist strength and failure model, initially developed for ceramics, is applied to geological materials. Strength is a complicated function of pressure, strain, strain rate, and damage. The JH model, coupled with a crack softening model, is used to describe both the inelastic response of rocks in the compressive field near the impact source and the tensile failure in the far field. The model parameters are determined either from direct static measurements, or from indirect numerical adjustment. The agreement between the simulation and experiment is very encouraging.

Ai, Huirong

393

A atuação do Observatório Nacional registrada nos relatórios ministeriais 1889 a 1930  

NASA Astrophysics Data System (ADS)

O período republicano até 1930 foi marcante na história do Observatório Nacional. Diversas reformas levaram a instituição a três ministérios diferentes e mudaram a ênfase do seu trabalho. A tão aguardada mudança para uma nova sede, em São Cristóvão, em 1920, não foi suficiente para que a instituição acompanhasse o ritmo tomado pela astronomia no mundo e se firmasse como ambiente de pesquisa. Uma análise simplificada poderia caracterizar um período de produção científica insignificante, dado o distanciamento da instituição dos novos rumos da astrofísica e da rápida inovação dos instrumentos, além do pequeno volume de publicações. Era uma época em que ainda não existiam os mecanismos formais de apoio e avaliação da atividade científica. Esse trabalho procura identificar a real atividade do Observatório no conteúdo dos Relatórios Ministeriais que, ao final de cada ano, apresentava as atividades, sucessos e problemas enfrentados pela instituição. Questões como instrumental e recursos humanos necessários; entraves burocráticos e financeiros; e articulações com outros observatórios se complementaram entre si ao longo desses anos para definir o perfil institucional e alguns aspectos fundamentais para a construção da astronomia no país. É possível concluir que a ênfase em serviços geográficos e de meteorologia, ao lado da inadequação dos instrumentos e do local, quase fizeram desaparecer a pesquisa em astronomia. Porém, vale destacar a sobrevivência de alguns trabalhos, como, por exemplo, variação de latitude e observação de estrelas duplas que mantiveram importante intercâmbio com outros grupos de pesquisa, demonstrando o constante esforço dos astrônomos e das diretorias em defesa da atividade científica.

Rodrigues, T.

2003-08-01

394

Frequency-dependent counting statistics in interacting nanoscale conductors  

NASA Astrophysics Data System (ADS)

Following the considerable success of shot-noise in the understanding of transport through mesoscopic systems, attention is now turning towards the higher-order statistics of electron current. The so-called Full Counting Statistics (FCS) of electron transport yields all moments (or cumulants) of the probability distribution P(n,t) of the number of transferred electrons during time t. The theory of FCS is now well established in the zero-frequency limit. However, this is by no means the full picture, since the higher-order current correlators at finite frequencies contain much more information than their zero-frequency counterparts. In this work [1], we present a formalism to calculate finite-frequency current correlations in interacting nanoscopic conductors. We work within the n-resolved density matrix approach and obtain a multi-time cumulant generating function that provides the fluctuation statistics solely from the spectral decomposition of the Liouvillian. We apply the method to the frequency-dependent third cumulant of the current through a single resonant level and through a double quantum dot. Our results, which show that deviations from Poissonian behaviour strongly depend on frequency, demonstrate the importance of finite-frequency higher-order cumulants in fully characterizing transport. [1] C. Emary, D. Marcos, R. Aguado and T. Brandes, Physical Review B, 76, 161404R, 2007.

Aguado, Ramon; Marcos, David; Emary, Clive; Brandes, Tobias

2008-03-01

395

Editorial: Focus on Extra Space Dimensions  

NASA Astrophysics Data System (ADS)

Experiments at the Large Hadron Collider (LHC) have just started. In addition to verifying the Standard Model (SM) of particle physics, these experiments will probe a new energy frontier and test extensions of the SM. The existence of extra dimensions is one of the most attractive possibilities for physics beyond the SM. This focus issue contains a collection of articles addressing both theoretical and phenomenological aspects of extra-dimensional models. Focus on Extra Space Dimensions Contents Minimal universal extra dimensions in CalcHEP/CompHEP AseshKrishna Datta, Kyoungchul Kong and Konstantin T Matchev Disordered extra dimensions Karim Benakli Codimension-2 brane-bulk matching: examples from six and ten dimensions Allan Bayntun, C P Burgess and Leo van Nierop Gauge threshold corrections in warped geometry Kiwoon Choi, Ian-Woo Kim and Chang Sub Shin Holographic methods and gauge-Higgs unification in flat extra dimensions Marco Serone Soft-wall stabilization Joan A Cabrer, Gero von Gersdorff and Mariano Quirós Warped five-dimensional models: phenomenological status and experimental prospects Hooman Davoudiasl, Shrihari Gopalakrishna, Eduardo Pontón and José Santiago

Agashe, Kaustubh; Pomarol, Alex

2010-07-01

396

TRIF Mediates Toll-Like Receptor 2-Dependent Inflammatory Responses to Borrelia burgdorferi  

PubMed Central

TRIF is an adaptor molecule important in transducing signals from intracellularly signaling Toll-like receptor 3 (TLR3) and TLR4. Recently, TLR2 was found to signal from intracellular compartments. Using a synthetic ligand for TLR2/1 heterodimers, as well as Borrelia burgdorferi, which is a strong activator of TLR2/1, we found that TLR2 signaling can utilize TRIF. Unlike TRIF signaling by other TLRs, TLR2-mediated TRIF signaling is dependent on the presence of another adaptor molecule, MyD88. However, unlike MyD88 deficiency, TRIF deficiency does not result in diminished control of infection with B. burgdorferi in a murine model of disease. This appears to be due to the effects of MyD88 on phagocytosis via scavenger receptors, such as MARCO, which are not affected by the loss of TRIF. In mice, TRIF deficiency did have an effect on the production of inflammatory cytokines, suggesting that regulation of inflammatory cytokines and control of bacterial growth may be uncoupled, in part through transduction of TLR2 signaling through TRIF.

Petnicki-Ocwieja, Tanja; Chung, Erin; Acosta, David I.; Ramos, Laurie T.; Shin, Ok S.; Ghosh, Sanjukta; Kobzik, Lester; Li, Xin

2013-01-01

397

Unlocking the Past of Sakurai's Object Using FORS/VLT  

NASA Astrophysics Data System (ADS)

Sakurai's object (V4334 Sgr) was discovered by Japanese amateur astronomer Y. Sakurai in February 1996 and first classified as a slow nova. Follow-up observations though immediately showed this to be a very special object indeed. It turned out to be a true stellar chameleon, perhaps the most rapidly evolving star ever witnessed. Details of its discovery and early observations are found in Duerbeck et al. (1996, 1997), Kerber et al. (1998) and Clayton & de Marco (1997). We have now used the combined power of FORS/VLT in order to deepen our insight into this object and its evolution. Using FORS/VLT observations, we have obtained the best spectrum of the old PN surrounding Sakurai's object. We have derived improved values for the interstellar reddening and we have been able to reliably measure additional diagnostic lines. In particular, the value found for the He II 4686 line is in excellent agreement with our earlier model calculations. We thereby confirm the previous result that the star was a hot, highly evolved PN nucleus before the flash.

Kerber, F.; Palsa, R.; Köppen, J.; Blöcker, T.; Rosa, M. R.

2000-09-01

398

Galahad: medium class asteroid sample return mission  

NASA Astrophysics Data System (ADS)

The Galahad asteroid sample return mission proposal to the NASA New Frontiers solicitation met all of the objectives for the Asteroid Rover/Sample Return mission as defined in that announcement. Galahad is in many ways similar to the Marco Polo and the OSIRIS-Rex proposals. All three missions plan bulk sample returns from primitive, C or B class Near Earth asteroids. Galahad in particular will rendezvous with and orbit the binary C-asteroid 1996 FG3, making extensive orbital measurements. It will then land and collect over 60 g of well-documented samples with geologic context for return to Earth. The samples are expected to provide abundant materials from the early solar system, including chondrules and CAIs, as well as a primitive assemblage of organics, presolar grains and probably hydrated minerals. Analyses of these samples will yield new understanding of the early solar system, planetary accretion, and the nature and origins of prebiotic organic material. We will discuss scientific and technical approaches to characterization of, landing on, and sample collection from small primitive bodies.

Cheng, Andrew; Rivkin, Andrew; Adler, Mark

399

Plan-B - Do All Planetary Nebulae Derive From Binaries?  

NASA Astrophysics Data System (ADS)

The planetary nebula (PN) field is facing a paradigm problem. For the last thirty years the role of binarity in the formation and shaping of PNe has been hotly debated. The majority of the active research community favored a scenario in which the majority of PNe are formed by single asymptotic giant stars that impart elliptical and bipolar shapes to their ejected envelopes by means of rotation and magnetic fields. However it has recently come to light that magnetic fields and rotation would not survive in a single star for long enough to be dynamically important. What is needed is an angular momentum source which can resupply the star of rotation at the right time. This angular momentum reservoir is most likely in the form of a binary companion. Today we know of only a handful of binary central stars of PN which are close enough to have interacted. Detecting binary central stars has therefore become paramount to provide an observational confirmation of the binary hypothesis. This task has however proven to be difficult, since most of the traditional techniques are difficult to apply to these bright, windy, and pulsating stars. In June 2007 an international working group has therefore been forged to aggressively tackle this observational challenge with a diverse range of observational approaches. This This work is funded in part by NSF grant AST-0607111 (PI: De Marco)

De Marco, Orsola; PLAN-B working Group

2007-12-01

400

Autophagy regulates phagocytosis by modulating the expression of scavenger receptors.  

PubMed

Autophagy and phagocytosis are conserved cellular functions involved in innate immunity. However, the nature of their interactions remains unclear. We evaluated the role of autophagy in regulating phagocytosis in macrophages from myeloid-specific autophagy-related gene 7-deficient (Atg7(-/-)) mice. Atg7(-/-) macrophages exhibited higher bacterial uptake when infected with Mycobacterium tuberculosis (Mtb) or with M. tuberculosis var. bovis BCG (BCG). In addition, BCG-infected Atg7(-/-) mice showed increased bacterial loads and exacerbated lung inflammatory responses. Atg7(-/-) macrophages had increased expression of two class A scavenger receptors: macrophage receptor with collagenous structure (MARCO) and macrophage scavenger receptor 1 (MSR1). The increase in scavenger receptors was caused by increased activity of the nuclear factor (erythroid-derived 2)-like 2 (NFE2L2) transcription factor resulting from accumulated sequestosome 1 (SQSTM1 or p62) in Atg7(-/-) macrophages. These insights increase our understanding of the host-pathogen relationship and suggest that therapeutic strategies should be designed to include modulation of both phagocytosis and autophagy. PMID:24035364

Bonilla, Diana L; Bhattacharya, Abhisek; Sha, Youbao; Xu, Yi; Xiang, Qian; Kan, Arshad; Jagannath, Chinnaswamy; Komatsu, Masaaki; Eissa, N Tony

2013-09-12

401

[Experiences in the training of health human resources for the integral care of the victims of violence in a suburban area of Lima, Peru].  

PubMed

In the year 2003, in the Faculty of Medicine of the Universidad Nacional Mayor de San Marcos, the Permanent Program of Training for the Integral Attention of the Victims of Violence was created, has been training human resources for the comprehensive health care to victims of violence. In this sense, we was considered necessary to develop a methodology for health professionals, identifying their training needs and the conditions under how they work. It is in this context, that the year 2004, a base line study was delineated in the Microrred de Salud Huaycán, in the east of Lima city; that included diverse stages with a multisectorial approach with the aim to identify the training needs of the health professionals, as well as the evaluation of the logistic and administrative support for the development of training activities to diverse levels. In this paper, the procedures and principal results are exposed, in a succinct way. There was demonstrated that the population of Huaycán were affected by the sequels of the political violence; nevertheless, the health services have severe limited resources to give appropriate health care to victims of violence. The health professionals require an intensive training on this issue. An adequate logistic and administrative conditions allowed to carry out an appropriate training program. We suggest that this methodology will facilitate to construct products and instruments for a suitable and specific training for the integral health care to the victims of the violence. PMID:21308206

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

402

Ozone Inhalation Promotes CX3CR1-dependent Maturation of Resident Lung Macrophages which Limit Oxidative Stress and Inflammation1, 2  

PubMed Central

Inhalation of ambient ozone alters populations of lung macrophages. However, the impact of altered lung macrophage populations on the pathobiology of ozone is poorly understood. We hypothesized that sub-populations of macrophages modulate the response to ozone. We exposed C57BL/6 mice to ozone (2 ppm × 3h) or filtered air. 24 h after the exposure, the lungs were harvested and digested and the cells underwent flow cytometry. Analysis revealed a novel macrophage subset present in ozone exposed mice, which were distinct from resident alveolar macrophages (AM) and identified by enhanced Gr-1+ expression (Gr-1 Macs). Further analysis identified that Gr-1+ Macs exhibited high expression of MARCO, CX3CR1, and NQO1. Gr-1+ Macs were present in the absence of CCR2, suggesting that they were not derived from a CCR2-dependent circulating intermediate. Using PKH26-PCL to label resident phagocytic cells, we demonstrated that Gr-1 Macs were derived from resident lung cells. This new subset was diminished in the absence of CX3CR1. Interestingly, CX3CR1-null mice exhibited enhanced responses to ozone, including increased airway hyperresponsiveness (AHR), exacerbated neutrophil influx, accumulation of 8-isoprostanes and protein carbonyls, and increased expression of cytokines (CXCL2, IL-1?, IL-6, CCL2, and TNF-?). Our results identify a novel subset of lung macrophages, which are derived from a resident intermediate, dependent upon CX3CR1, and appear to protect the host from the biological response to ozone.

Tighe, Robert M.; Li, Zhuowei; Potts, Erin N.; Frush, Sarah; Liu, Ningshan; Gunn, Michael D.; Foster, W. Michael; Noble, Paul W.; Hollingsworth, John W.

2011-01-01

403

Stochastic mean-field theory: Method and application to the disordered Bose-Hubbard model at finite temperature and speckle disorder  

SciTech Connect

We discuss the stochastic mean-field theory (SMFT) method, which is a new approach for describing disordered Bose systems in the thermodynamic limit including localization and dimensional effects. We explicate the method in detail and apply it to the disordered Bose-Hubbard model at finite temperature, with on-site box disorder, as well as experimentally relevant unbounded speckle disorder. We find that disorder-induced condensation and re-entrant behavior at constant filling are only possible at low temperatures, beyond the reach of current experiments [M. Pasienski, D. McKay, M. White, and B. DeMarco, e-print arXiv:0908.1182]. Including off-diagonal hopping disorder as well, we investigate its effect on the phase diagram in addition to pure on-site disorder. To make connection to present experiments on a quantitative level, we also combine SMFT with an LDA approach and obtain the condensate fraction in the presence of an external trapping potential.

Bissbort, Ulf; Hofstetter, Walter [Institut fuer Theoretische Physik, Johann Wolfgang Goethe-Universitaet, D-60438 Frankfurt/Main (Germany); Thomale, Ronny [Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)

2010-06-15

404

Recovery of Salmonella from biofilms in a headwater spring ecosystem.  

PubMed

Salmonellae are pathogenic bacteria often detected in waters impacted by human or animal wastes. In order to assess the fate of salmonellae in supposedly pristine environments, water and natural biofilm samples along with snails (Tarebia granifera) and crayfish (Procambarus clarkia) were collected before and up to 7 days following four precipitation events from sites within the headwater springs of Spring Lake, San Marcos, TX. The samples were analyzed for the presence of salmonellae by polymerase chain reaction (PCR) after semi-selective enrichment. Salmonellae were detected in one water sample directly after precipitation only, while detection in ten biofilm and two crayfish samples was not related to precipitation. Salmonellae were not detected in snails. Characterization of isolates by rep-PCR revealed shared profiles in water and biofilm samples, biofilm and crayfish samples, and biofilm samples collected 23 days apart. These results suggest that salmonellae are infrequently washed into this aquatic ecosystem during precipitation runoff and can potentially take up residency in biofilms which can help facilitate subsequent long-term persistence and eventual transfer through the food chain. PMID:21976193

Gaertner, James P; Mendoza, Joseph A; Forstner, Michael R J; Hahn, Dittmar

2011-09-01

405

Cryogenic near-field microscope working at LN temperature  

NASA Astrophysics Data System (ADS)

We have constructed a versatile low temperature scanning near-field optical microscope with the capability of near- field spectroscopy, operating at liquid nitrogen (LN) temperature. The compact low temperature scanning head was built on one piece of Marco with a unique linear nano-motor as the coarse approach. A tuning fork mechanism was adopted to detect and regulate the fiber tip-sample separation. The x-y scan can be performed either by the single tube scanner on triple tube scanner, depending on the application. A double shield dewar was used where the outer chamber was filled with LN. The core chamber was evacuated before cooling and then filled with cooled nitrogen gas, hence the working temperature can be controlled at around 80 K. A special designed coaxial double lens was used to introduce the illumination beam through a 200-micron fiber; the detected optical signal was transmitted via a fiber tip to a PMT or an APD. The performance test shows the stability of the new design. The resolution of shear force imaging and optical image of standard sample are shown.

Yin, Yan; Zhu, Xing; Fei, Teng; Xu, Shifa; Zhou, Hetian; Gan, Zizhao; Song, Feijun

1999-09-01

406

Practices related to postpartum uterine involution in the Western Highlands of Guatemala  

PubMed Central

Background Guatemala has the third highest level of maternal mortality in Latin America. Postpartum haemorrhage is the main cause of maternal mortality. In rural Guatemala, most women rely on Traditional Birth Attendants (TBAs) during labour, delivery, and the postpartum period. Little is known about current postpartum practices that may contribute to uterine involution provided by Mam- and Spanish-speaking TBAs in the Western Highlands of Guatemala. Methods a qualitative study was conducted with 39 women who participated in five focus groups in the San Marcos Department of Guatemala. Questions regarding postpartum practices were discussed during four focus groups of TBAs and one group of auxiliary nurses. Results three postpartum practices believed to aid postpartum uterine involution were identified: use of the chuj (Mam) (Spanish, temazcal), a traditional wood-fired sauna-bath used by Mam-speaking women; herbal baths and teas; and administration of biomedicines. Conclusions TBAs provide the majority of care to women during childbirth and the postpartum period and have developed a set of practices to prevent and treat postpartum haemorrhage. Integration of these practices may prove an effective method to reduce maternal morbidity and mortality in the Western Highlands of Guatemala.

Radoff, K.A.; Thompson, Lisa M.; Bly, KC; Romero, Carolina

2013-01-01

407

Elastase/LPS-Exposed Mice Exhibit Impaired Innate Immune Responses to Bacterial Challenge  

PubMed Central

Nontypeable Haemophilus influenzae (NTHi) is an important bacterial pathogen associated with lower respiratory tract colonization and with acute exacerbations and disease progression in chronic obstructive pulmonary disease (COPD). Why the immune system fails to eliminate NTHi and the exact contribution of the organism to COPD progression are not well understood, in part because we lack an animal model that mimics all aspects of COPD. For this study, we used an established murine model that exhibits typical features of COPD. Elastase/LPS-exposed mice infected with NTHi showed persistence of bacteria up to 5 days after infection, whereas mice exposed to elastase, LPS, or PBS cleared all bacteria by 3 days. Elastase/LPS-exposed mice also showed sustained lung neutrophilic inflammation, goblet cell metaplasia, airway hyperresponsiveness, and progression of emphysema at 15 days after infection. Alveolar macrophages isolated from elastase/LPS-exposed mice showed impaired bacterial phagocytosis, reduced expression of MARCO and of mannose receptor, and absent expression of scavenger receptor-A (SR-A). Neutralization of SR-A significantly decreased phagocytosis of NTHi by normal alveolar macrophages. Our results suggest that elastase/LPS-exposed mice show impaired bacterial clearance and sustained lung inflammation. Lack of SR-A expression may, in part, be responsible for impaired phagocytosis of bacteria by alveolar macrophages of elastase/LPS-exposed mice. These data validate the suitability of elastase/LPS model for investigating NTHi pathogenesis and progression of disease in COPD.

Ganesan, Shyamala; Faris, Andrea N.; Comstock, Adam T.; Sonstein, Joanne; Curtis, Jeffrey L.; Sajjan, Uma S.

2012-01-01

408

The Origin of Asteroid 162173 (1999 JU3)  

NASA Astrophysics Data System (ADS)

Near-Earth asteroid (162173) 1999 JU3 (henceforth JU3) is a potentially hazardous asteroid and the target of the Japanese Aerospace Exploration Agency’s Hayabusa-2 sample return mission. JU3 is also a backup target for two other sample return missions: NASA’s OSIRIS-REx and the European Space Agency’s Marco Polo-R. We use dynamical information to identify an inner-belt, low-inclination origin through the ?6 resonance, more specifically the region with 2.15 AU < a < 2.5 AU and i < 8 degrees. The geometric albedo of JU3 is 0.07 ± 0.01, and this inner-belt region contains four well- defined low-albedo asteroid families (Clarissa, Erigone, Polana and Sulamitis), plus a recently identified background population of low-albedo asteroids outside these families. Only two of these five groups, the background and the Polana family, deliver JU3-sized asteroids to the ?6 resonance, and the background delivers significantly more JU3-sized asteroids. The available spectral evidence is also diagnostic; the visible and near-infrared spectra of JU3 indicate it is a C-type asteroid, which is compatible with members of the background, but not with the Polana family because it contains primarily of B-type asteroids. Hence, this background population of low-albedo asteroids is the most likely source of JU3.

Comfort, Christine; Campins, H.; de Leon, J.; Morbidelli, A.; Licandro, J.; Gayon-Markt, J.; Delbo, M.; Michel, P.

2013-10-01

409

Diversity of Salmonella in biofilms and water in a headwater ecosystem.  

PubMed

The diversity of Salmonella was analysed in biofilm and water samples from the spring and slough arms of Spring Lake, the headwaters of the San Marcos River, Texas, during the drought of 2011, with only one potential run-off event at the beginning of the study. Salmonellae were detected in semiselective enrichment cultures by end-point PCR during the entire sampling period of (11 sampling events during 2 months). From the spring arm site, 73% of the biofilms and 41% of the water samples were positive for salmonellae, while only 9% of the biofilms and 23% of the water samples were positive from the slough arm site. Salmonellae could be isolated from all positive samples, with higher diversity in biofilms compared with water samples and more strains obtained from the spring arm than from the slough arm. Differences between sites were generally caused by less frequently detected isolates, while the majority of isolates that were present in both biofilms and water from both sites was represented by three strains only. Quantification attempts by quantitative PCR directly in samples without prior enrichment did not result in a reliable detection of salmonellae, suggesting that numbers in all samples were below the detection limit. PMID:23025800

Sha, Qiong; Forstner, Michael R J; Hahn, Dittmar

2012-11-06

410

Conference Committees: Conference Committees  

NASA Astrophysics Data System (ADS)

International Programm Committee (IPC) Harald Ade NCSU Sadao Aoki University Tsukuba David Attwood Lawrence Berkeley National Laboratory/CXRO Christian David Paul Scherrer Institut Peter Fischer Lawrence Berkeley National Laboratory Adam Hitchcock McMaster University Chris Jacobsen SUNY, Stony Brook Denis Joyeux Lab Charles Fabry de l'Institut d'Optique Yasushi Kagoshima University of Hyogo Hiroshi Kihara Kansai Medical University Janos Kirz SUNY Stony Brook Maya Kiskinova ELETTRA Ian McNulty Argonne National Lab/APS Alan Michette Kings College London Graeme Morrison Kings College London Keith Nugent University of Melbourne Zhu Peiping BSRF Institute of High Energy Physics Francois Polack Soleil Christoph Quitmann Paul Scherrer Institut Günther Schmahl University Göttingen Gerd Schneider Bessy Hyun-Joon Shin Pohang Accelerator Lab Jean Susini ESRF Mau-Tsu Tang NSRRC Tony Warwick Lawrence Berkeley Lab/ALS Local Organizing Committee Christoph Quitmann Chair, Scientific Program Charlotte Heer Secretary Christian David Scientific Program Frithjof Nolting Scientific Program Franz Pfeiffer Scientific Program Marco Stampanoni Scientific Program Robert Rudolph Sponsoring, Financials Alfred Waser Industry Exhibition Robert Keller Public Relation Markus Knecht Computing and WWW Annick Cavedon Proceedings and Excursions and Accompanying Persons Program Margrit Eichler Excursions and Accompanying Persons Program Kathy Eikenberry Excursions and Accompanying Persons Program Marlies Locher Excursions and Accompanying Persons Program

2009-09-01

411

Constructing a time series for large landslides in Trentino (Italy) with 36Cl exposure dating  

NASA Astrophysics Data System (ADS)

The Trentino province of NE Italy is characterized by numerous large landslides and rock avalanche deposits, notably in valleys that are rather densely inhabited. One may gain fundamental information for calculation of return times of slope collapses by surface exposure dating of boulders and scarp area bedrock. First investigations focus on the following landslides: Lavini di Marco (covering an area of 15.7 km2), Marocche di Dro (8.1 km2), Molveno (5.0 km2); Palone (2.5 km2), Castelpietra (0.4 km2), Marzola (12.5 km2). Field surveys that indicate multi-phase activity serve as a basis for sampling. Cosmogenic 36Cl was used due to the predominance of limestone and dolomite. In this presentation, interpretation of (in some cases scattered) age distributions at individual sites will be discussed, especially the frequency of pre-exposure. The distribution in time of the Trentino, mass movement events will be considered in light of what is known about paleoseismicity in the region, the timing of other large landslides in the Alps, and the sequence of climate variations during the Holocene.

Ivy-Ochs, S.; Martin, S.; Campedel, P.; Alfimov, V.; Andreotti, E.; Viganò, A.; Carugati, G.; Vockenhuber, C.; Cocco, S.

2012-04-01

412

Phylogeography and Conservation Genetics of a Distinct Lineage of Sunfish in the Cuatro Ci?negas Valley of Mexico  

PubMed Central

The valley of Cuatro Ciénegas, an aquatic oasis located in the Mexican Chihuahuan Desert, exhibits the highest level of endemism in North America and is a Mexican National Protected Area. However, little is known about the evolutionary distinctiveness of several vertebrate species present in the Cuatro Ciénegas valley. We conducted a phylogeographic study using mitochondrial haplotypes from the centrarchid fish Lepomis megalotis to determine if the populations found within the valley were evolutionarily distinct from populations outside the valley. We also examined if there was evidence of unique haplotypes of this sunfish within the valley. Genetic divergence of L. megalotis suggests populations within the valley are evolutionarily unique when compared to L. megalotis outside the valley. Significant mitochondrial sequence divergence was also discovered between L. megalotis populations on either side of the Sierra de San Marcos that bisects the valley. Our results reinforce previous studies that suggest the organisms occupying aquatic habitats not only within Cuatro Ciénegas but also in each of the two lobes of the valley generally deserve independent consideration during management decisions.

Coghill, Lyndon M.; Hulsey, C. Darrin; Chaves-Campos, Johel; Garcia de Leon, Francisco J.; Johnson, Steven G.

2013-01-01

413

Spatial patterning of vulture scavenged human remains.  

PubMed

This article presents the results of a pilot study on the effects of vulture modification to human remains. A donated body from the Willed Body Donation Program was placed at the Forensic Anthropology Research Facility (FARF), an outdoor human decomposition laboratory located at Texas State University-San Marcos. The effects of vulture scavenging on the timing and sequence, and the rate of skeletonization, disarticulation, and dispersal were observed via a motion sensing camera and direct observation. Using GIS (Geographic Information Systems) and GPS (Global Positioning System) technologies and spatial analytical methods, the transport of skeletal elements was mapped in order to analyze dispersal and terrain-influenced patterns of active vulture scavenging. Results showed that the initial scavenging took place 37 days after placement at FARF. This delay in scavenging differs from previous research. After the initial appearance of the vultures, the body was reduced from a fully-fleshed individual to a skeleton within only 5h. This underscores the potential for errors in postmortem interval estimations made at vulture scavenged scenes. Additionally, spatial analysis showed that skeletal elements were dispersed by vultures to lower elevations, and that the disarticulation and dispersal of the skeletal elements occurs early in the scavenging sequence. PMID:22204892

Spradley, M Katherine; Hamilton, Michelle D; Giordano, Alberto

2011-12-26

414

USGS field activity 09FSH02 on the west Florida shelf, Gulf of Mexico, in August 2009  

USGS Publications Warehouse

From August 17 to 21, 2009, a cruise led by the U.S. Geological Survey (USGS) collected air and sea surface partial pressure of carbon dioxide (pCO2), pH, dissolved inorganic carbon (DIC), and total alkalinity (TA) data on the west Florida shelf. Approximately 2,000 data points were collected underway over a 1,320-kilometer (km) track line using the Multiparameter Inorganic Carbon Analyzer (MICA). The collection of data extended from Crystal River to Marco Island, Florida (~400 km), and westward up to 160 km off the Florida coast. Discrete water samples were also taken at specific localities to corroborate underway data measurements. The USGS St. Petersburg Coastal and Marine Science Center (SPCMSC) assigns a unique identifier to each cruise or field activity. For example, 09FSH02 tells us that the data were collected in 2009 for the Response of Florida Shelf (FSH) Ecosystems to Climate Change project, and the data were collected during the second field activity for that study in that calendar year.

Robbins, Lisa L.; Knorr, Paul O.; Liu, Xuewu; Byrne, Robert H.; Raabe, Ellen A.

2009-01-01

415

USGS field activity 08FSH01 on the west Florida shelf, Gulf of Mexico, in August 2008  

USGS Publications Warehouse

From August 11 to 15, 2008, a cruise led by the U.S. Geological Survey (USGS) collected air and sea surface partial pressure of carbon dioxide (pCO2), pH, dissolved inorganic carbon (DIC), and total alkalinity (TA) data on the west Florida shelf. Approximately 1,600 data points were collected underway over a 650-kilometer (km) trackline using the Multiparameter Inorganic Carbon Analyzer (MICA). The collection of data extended from Crystal River southward to Marco Island, Florida (~400 km), and westward up to 160 km off the Florida coast. Discrete water samples from approximately 40 locations were also taken at specific localities to corroborate underway data measurements. The USGS St. Petersburg Coastal and Marine Science Center (SPCMSC) assigns a unique identifier to each cruise or field activity. For example, 08FSH01 tells us the data were collected in 2008 for the Response of Florida Shelf (FSH) Ecosystems to Climate Change project, and the data were collected during the first field activity for that study in that calendar year.

Robbins, Lisa L.; Knorr, Paul O.; Liu, Xuewu; Byrne, Robert H.; Raabe, Ellen A.

2009-01-01

416

USGS field activity 09FSH01 on the west Florida shelf, Gulf of Mexico, in February 2009  

USGS Publications Warehouse

From February 24 to 28, 2009, a cruise led by the U.S. Geological Survey (USGS) collected air and sea surface partial pressure of carbon dioxide (pCO2), pH, dissolved inorganic carbon (DIC), and total alkalinity (TA) data on the west Florida shelf. Approximately 1,800 data points were collected underway over a 1,300-kilometer (km) trackline using the Multiparameter Inorganic Carbon Analyzer (MICA). The collection of data extended from Crystal River to Marco Island, Florida (~400 km), and westward up to 160 km off the Florida coast. Discrete water samples were also taken at specific localities to corroborate underway data measurements. The USGS St. Petersburg Coastal and Marine Science Center (SPCMSC) assigns a unique identifier to each cruise or field activity. For example, 09FSH01 tells us that the data were collected in 2009 for the Response of Florida Shelf (FSH) Ecosystems to Climate Change project, and the data were collected during the first field activity for that study in that calendar year.

Robbins, Lisa L.; Knorr, Paul O.; Liu, Xuewu; Byrne, Robert H.; Raabe, Ellen A.

2009-01-01

417

Mobile Asteroid Surface Scout (MASCOT) - An asteroid lander package for the Hayabusa-2 mission  

NASA Astrophysics Data System (ADS)

The Hayabusa-2 mission is currently being studied by JAXA/JSPEC as a sample return mission to the C-type near-Earth asteroid 1999JU3. Hayabusa-2, with launch planned for 2014, would be the immediate successor to the currently flying Hayabusa mission. Originally in the context of the proposed ESA Cosmic Vision M-class mission Marco Polo, but then following an invitation by JAXA/JSPEC, the Institute of Space Systems of the German Aerospace Center (DLR) led a proposal for a separate lander package 'Mascot' (Mobile Asteroid Surface Scout) to be carried on the mission. A feasibility study was subsequently carried out that, upon consultation with the planetary science community, assessed different concepts for the lander that converged to a package with 3 kg of P/L, for a total mass of 10-15 kg. Presently, 'Mascot' enters the preliminary design phase while an Announcement of Opportunity for its payload complement is being prepared. The presentation will outline the current baseline design, with special consideration of how the highly demanding constraints that are being imposed on the system due to the general mission scenario, the asteroid environment and the tight budgetary limitations are being fulfilled in such a rather modest design, still offering an excellent science potential.

Lange, Caroline; Richter, Lutz; Dietze, Claudia; Ho, Tra-Mi; Lange, Michael; Sproewitz, Tom; Wagenbach, Susanne; Kroemer, Olaf; Witte, Lars; Braukhane, Andy

2010-05-01

418

Baseline design of a Mobile Asteroid Surface Scout (MASCOT) for the Hayabusa-2 mission  

NASA Astrophysics Data System (ADS)

The Hayabusa-2 mission is currently being studied by JAXA/JSPEC as a sample return mis-sion to the C-type near-Earth asteroid 1999JU3. Hayabusa-2, with launch planned for 2014, would be the immediate successor to the currently flying Hayabusa mission. Originally in the context of the proposed ESA Cosmic Vision M-class mission Marco Polo, but then following an invitation by JAXA/JSPEC, the Institute of Space Systems of the German Aerospace Center (DLR) led a proposal for a separate lander package MASCOT (Mobile Asteroid Surface Scout) to be carried on the mission. A feasibility study was subsequently carried out that, upon consultation with the planetary science community, assessed different concepts for the lander that converged to a package with 3 kg of P/L, for a total mass of 10-15 kg. Presently, MASCOT is in the preliminary design phase and an Announcement of Opportunity for its payload complement is being prepared. This paper is intended to give an overview over the current system baseline design and dedicated subsystems, such as mobility. The focus will be on the highly demanding constraints that are being imposed on the system due to the general mission scenario, the asteroid environment and the tight budgetary limitations and the means by which these constraints are being fulfilled, while still offering an excellent science potential.

Lange, Caroline; Richter, Lutz; Ho, Tra Mi; Witte, Lars

419

Stress wave attenuation in shock-damaged rock  

NASA Astrophysics Data System (ADS)

The velocity and attenuation of ultrasonic stress waves in gabbroic rock samples (San Marcos, California) subjected to shock loading in the 2 GPa range were studied. Prom P wave velocity measurements we determined the damage parameter Dp and crack density ? of the samples and related these to the attenuation coefficient (quality factor) under dynamic strains of 2×10-7 and at a frequency of 2 MHz using the ultrasonic pulse-echo method. A fit to the data yields the P wave spatial attenuation coefficient at a frequency of 2 MHz, ?p(Dp) = 1.1 + 28.2DP (decibels per centimeter). From the relation between the attenuation coefficient and quality factor, the quality factor Q is given by Q-1 = 0.011(1 + 25.6Dp)(1 - Dp)½. Using O'Connell-Budiansky theory relating crack density to velocity, the parameter in Walsh's theory was determined based on experimental data. An approximate method is also proposed to estimate the average half-length of cracks based on the attenuation measurements.

Liu, Cangli; Ahrens, Thomas J.

1997-03-01

420

Mexico: World Oil Report 1991  

SciTech Connect

This paper reports that state oil company Pemex appears to be in the middle of a mini-renaissance. Senior management proudly points to several areas of improvement, including a major reduction in the power of petroleum labor unions; a structural reorganization of the company into profit and cost centers; a significant trimming of foreign and domestic debt; and the growing readmittance of foreign investment and technology. Effects of these policy successes already are quantifiable and impressive. Restricting the unions' power has allowed Pemex to break the old habit of employing too many people and paying them too much. Indeed, the workforce has shrunk 30% to just below 150,000. Under the guidance of Finance Director Ernesto Marcos, Pemex has whittled its foreign debt to $5.6 billion from a 1982 high of $20 billion. Furthermore, the extra income provided by higher oil prices during the Persian Gulf war allowed Pemex in December to completely pay off its domestic debt, which has been nearly 2.5 trillion pesos (about $850 million) in the first quarter of 1990.

Maciej, H. (Canadian Petroleum Association, Calgary, AB (Canada))

1991-08-01

421

Thinkfinity: Teacher Resources  

NSDL National Science Digital Library

Thinkfinity.org, which encompasses the programs formerly known as Verizon MarcoPolo and the Verizon Literacy Network, is an online portal to fifty thousand K-12 lesson plans and other educational resources. The portal also provides professional development resources for teachers as well as literacy materials for all ages. Verizon's financial commitment will enable leading educational organizations to continue to produce and expand the program's interactive features. Content is provided through the American Association for the Advancement of Science, the International Reading Association, the John F. Kennedy Center for the Performing Arts, the National Center for Family Literacy, the National Council on Economic Education, the National Endowment for the Humanities, the National Council of Teachers of English, the National Council of Teachers of Mathematics, the National Geographic Society, ProLiteracy Worldwide, and the Smithsonian's National Museum of American History. According to Charmona Whitfield, a K-6 instructional technology teacher, the Thinkfinity program saves teachers time, is easy to navigate, and provides quick access to lesson plans. "Producing interactive, engaging lessons plans is a necessity to reach our children in the classroom today," she said. "Because our kids have iPods, cell phones, and X-boxes, they need to truly interact with what they are learning. To simply stand in front of them and talk is not enough."

2010-05-17

422

Paradoxical cardiovascular effects of implementing adaptive emotion regulation strategies in generalized anxiety disorder.  

PubMed

Recent models of generalized anxiety disorder (GAD) have expanded on Borkovec's avoidance theory by delineating emotion regulation deficits associated with the excessive worry characteristic of this disorder (see Behar, DiMarco, Hekler, Mohlman, & Staples, 2009). However, it has been difficult to determine whether emotion regulation is simply a useful heuristic for the avoidant properties of worry or an important extension to conceptualizations of GAD. Some of this difficulty may arise from a focus on purported maladaptive regulation strategies, which may be confounded with symptomatic distress components of the disorder (such as worry). We examined the implementation of adaptive regulation strategies by participants with and without a diagnosis of GAD while watching emotion-eliciting film clips. In a between-subjects design, participants were randomly assigned to accept, reappraise, or were not given specific regulation instructions. Implementation of adaptive regulation strategies produced differential effects in the physiological (but not subjective) domain across diagnostic groups. Whereas participants with GAD demonstrated lower cardiac flexibility when implementing adaptive regulation strategies than when not given specific instructions on how to regulate, healthy controls showed the opposite pattern, suggesting they benefited from the use of adaptive regulation strategies. We discuss the implications of these findings for the delineation of emotion regulation deficits in psychopathology. PMID:22218164

Aldao, Amelia; Mennin, Douglas S

2011-12-21

423

Cloning, sequencing, and growth phase-dependent transcription of the coenzyme F420-dependent N5,N10-methylenetetrahydromethanopterin reductase-encoding genes from Methanobacterium thermoautotrophicum delta H and Methanopyrus kandleri.  

PubMed Central

The mer genes, which encode the coenzyme F420-dependent N5,N10-methylenetetrahydromethanopterin reductases (CH2 = H4MPT reductases), and their flanking regions have been cloned from Methanobacterium thermoautotrophicum delta H and Methanopyrus kandleri and sequenced. The mer genes have DNA sequences that are 57% identical and encode polypeptides with amino acid sequences that are 57% identical and 71% similar, with calculated molecular masses of 33.6 and 37.5 kDa, respectively. In M. thermoautotrophicum, mer transcription has been shown to initiate 10 bp upstream from the ATG translation initiating codon and to generate a monocistronic transcript approximately 1 kb in length. This transcript was synthesized at all stages of M. thermoautotrophicum delta H growth in batch cultures but was found to increase in abundance from the earliest stages of exponential growth, reaching a maximum level at the mid-exponential growth phase. For comparison, transcription of the ftr gene from M. thermoautotrophicum delta H that encodes the formylmethanofuran:tetrahydromethanopterin formyltransferase (A. A. DiMarco, K. A. Sment, J. Konisky, and R. S. Wolfe, J. Biol. Chem. 265:472-476, 1990) was included in this study. The ftr transcript was found similarly to be monocistronic and to be approximately 1 kb in length, but, in contrast to the mer transcript, the ftr transcript was present at maximum levels at both the early and the mid-exponential growth stages.

Nolling, J; Pihl, T D; Reeve, J N

1995-01-01

424

Absence of Nkx2-3 Homeodomain Transcription Factor Induces the Formation of LYVE-1-Positive Endothelial Cysts without Lymphatic Commitment in the Spleen  

PubMed Central

In contrast to peripheral lymph nodes possessing lymphatic and blood vasculature, the spleen in both humans and rodents is largely devoid of functioning lymphatic capillaries. Here it is reported that in mice lacking homeodomain transcription factor Nkx2-3, the spleen contains an extensive network of lymphocyte-filled sacs lined by cells expressing LYVE-1 antigen, a marker associated with lymphatic endothelium cells (LECs). Real-time quantitative PCR analyses of Nkx2-3 mutant spleen revealed a substantial increase of LYVE-1 and podoplanin mRNA levels, without the parallel increase of mRNA for VEGFR-3 (vascular endothelial growth factor receptor Type 3) and Prox1 (Prospero homeobobox protein 1), two markers specific for LECs. Although these structures express VEGFR-2/flk-1, they lack Prox1 protein, indicating their non-LEC endothelial origin. The LYVE-1+ structures are bordered with ER-TR7+ fibroblastic reticular cells with small clusters of macrophages expressing MARCO and sialoadhesin. Short-term cell-tracing studies using labeled lymphocytes indicate that these LYVE-1+ cysts are largely excluded from the systemic circulation. Cells expressing LYVE-1 glycoprotein as putative precursors for such structures are detectable in the spleen of late-stage embryos, and the formation of LYVE-1+ structures is independent from the activity of lymphotoxin ?-receptor. Thus the splenic vascular defects in Nkx2-3 deficiency include the generation of LYVE-1+ cysts, comprised of endothelial cells without being committed along the LEC lineage.

Kellermayer, Zoltan; Labadi, Arpad; Czompoly, Tamas; Arnold, Hans-Henning; Balogh, Peter

2011-01-01

425

Sobre o uso das séries de Puiseux em mecanica celeste  

NASA Astrophysics Data System (ADS)

Neste trabalho é apresentada uma demonstração do uso dos diferentes desenvolvimentos em séries para as equações de perturbação em Mecânica Celeste no marco Hamiltoniano. Em trabalhos clássicos como os de Poincaré (Poincaré, 1893) por exemplo, já esta planteado o uso de potências não inteiras no pequeno parâmetro, o que evidencia a não analiticidade das funções quando uma ressonância ocorre. Nestes trabalhos os desenvolvimentos são na raíz quadrada da massa de Júpiter (o pequeno parâmetro). Mais recentemente (Ferraz-Mello, 1985) outros tipos de desenvolvimentos foram aplicados modificando substancialmente as ordens de grandeza e a velocidade de convergência das séries. Com esta abordagem, os desenvolvimentos foram expressados em termos da raíz cúbica do pequeno parâmetro. Neste trabalho apresentamos um enfoque geral, onde os diferentes tipos de desenvolvimentos em séries de Puiseux (Valiron, 1950) são obtidos a partir da aplicação de Teorema de Preparação de Weierstrass (Goursat, 1916) considerando a equação de Hamilton-Jacobi como uma equação algébrica. Os resultados são aplicados ao problema restrito dos três corpos em ressonância de primeira ordem e, dependendo da grandeza da excentricidade do asteróide em relação à de Júpiter, obtemos os diferentes desenvolvimentos, em raíz quadrada ou raíz cúbica da massa de Júpiter.

Miloni, O. I.

2003-08-01

426

Tracing the genomic ancestry of Peruvians reveals a major legacy of pre-Columbian ancestors.  

PubMed

In order to investigate the underlying genetic structure and genomic ancestry proportions of Peruvian subpopulations, we analyzed 551 human samples of 25 localities from the Andean, Amazonian, and Coastal regions of Peru with a set of 40 ancestry informative insertion-deletion polymorphisms. Using genotypes of reference populations from different continents for comparison, our analysis indicated that populations from all 25 Peruvian locations had predominantly Amerindian genetic ancestry. Among populations from the Titicaca Lake islands of Taquile, Amantani, Anapia, and Uros, and the Yanque locality from the southern Peruvian Andes, there was no significant proportion of non-autochthonous genomes, indicating that their genetic background is effectively derived from the first settlers of South America. However, the Andean populations from San Marcos, Cajamarca, Characato and Chogo, and coastal populations from Lambayeque and Lima displayed a low but significant European ancestry proportion. Furthermore, Amazonian localities of Pucallpa, Lamas, Chachapoyas, and Andean localities of Ayacucho and Huancayo displayed intermediate levels of non-autochthonous ancestry, mostly from Europe. These results are in close agreement with the documented history of post-Columbian immigrations in Peru and with several reports suggesting a larger effective size of indigenous inhabitants during the formation of the current country's population. PMID:23863748

Sandoval, Jose R; Salazar-Granara, Alberto; Acosta, Oscar; Castillo-Herrera, Wilder; Fujita, Ricardo; Pena, Sergio Dj; Santos, Fabricio R

2013-07-18

427

Consensus Recommendations for Current Treatments and Accelerating Clinical Trials for Patients with Neurofibromatosis Type 2  

PubMed Central

Neurofibromatosis type 2 (NF2) is a tumor suppressor syndrome characterized by bilateral vestibular schwannomas (VS) which often result in deafness despite aggressive management. Meningiomas, ependymomas and other cranial nerve and peripheral schwannomas are also commonly found in NF2 and collectively lead to major neurologic morbidity and mortality. Traditionally, the overall survival rate in patients with NF2 is estimated to be 38% at 20 years from diagnosis. Hence, there is a desperate need for new, effective therapies. Recent progress in understanding the molecular basis of NF2 related tumors has aided in the identification of potential therapeutic targets and emerging clinical therapies. In June 2010, representatives of the international NF2 research and clinical community convened under the leadership of Drs. D. Gareth Evans (University of Manchester) and Marco Giovannini (House Research Institute) to review the state of NF2 treatment and clinical trials. This manuscript summarizes the expert opinions about current treatments for NF2 associated tumors and recommendations for advancing therapies emerging from that meeting. The development of effective therapies for NF2 associated tumors has the potential for significant clinical advancement not only for patients with NF2 but for thousands of neuro-oncology patients afflicted with these tumors.

Blakeley, Jaishri O; Evans, D. Gareth; Adler, John; Brackmann, Derald; Chen, Ruihong; Ferner, Rosalie E.; Hanemann, C. Oliver; Harris, Gordon; Huson, Susan M.; Jacob, Abraham; Kalamarides, Michel; Karajannis, Matthias A.; Korf, Bruce R.; Mautner, Victor-Felix; McClatchey, Andrea I.; Miao, Harry; Plotkin, Scott R.; Slattery, William; Stemmer-Rachamimov, Anat O.; Welling, D. Bradley; Wen, Patrick Y.; Widemann, Brigitte; Hunter-Schaedle, Kim; Giovannini, Marco

2011-01-01

428

Sample Return Missions from Minor Bodies: Achievements, Future Plan and Observational Support  

NASA Astrophysics Data System (ADS)

We are entering in a new era of space exploration signed by sample return missions. Since the Apollo and Luna Program, the study of extraterrestrial samples in laboratory is gathering an increased interest of the scientific community so that nowadays exploration program of the Solar System is characterized by swelling sample return missions. Beside lunar samples, the NASA Stardust mission was the first successful space mission that on 15 January 2006 brought to Earth solid extraterrestrial samples collected from comet 81P/Wild 2 coma. Grains were collected during cometary fly-by into aerogel and once on Earth have been extracted for laboratory analyses. In the coming two decades many space missions on going or under study will harvest samples from minor bodies. Measurements required for detailed analysis that cannot be performed from a robotic spacecraft, will be carried out on Earth laboratories with the highest analytical accuracy attainable so far. An intriguing objective for the next sample return missions is to understand the nature of organic compounds. Organic compounds found in Stardust grains even if processed to large extend during aerogel capturing are here reported. Major objectives of Marco Polo mission are reported. Various ground-based observational programs within the framework of general characterizations of families and classes, cometary-asteroid transition objects and NEOs with cometary albedo are discussed and linked to sample return mission.

Brucato, J. R.; Rotundi, A.; Epifani, E. Mazzotta

2009-09-01

429

Salinity variations and chemical compositions of waters in the Frio Formation, Texas Gulf Coast. Annual report  

SciTech Connect

Waters produced from sandstone reservoirs of the deep Frio Formation exhibit spatial variations in chemical composition that roughly coincide with the major tectonic elements (Houston and Rio Grande Embayments, San Marcos Arch) and corresponding depositional systems (Houston and Norias deltas, Greta-Carancahua barrier/strandplain system) that were respectively active along the upper, lower, and middle Texas Coast during Frio deposition. Within an area, salinities are usually depth dependent, and primary trends closely correspond to pore pressure gradients and thermal gradients. Where data are available (mainly in Brazoria County) the increases in TDS and calcium with depth coincide with the zone of albitization, smectite-illite transition, and calcite decrease in shales. Waters have fairly uniform salinities when produced from the same sandstone reservoir within a fault block or adjacent fault blocks with minor displacement. In contrast, stratigraphically equivalent sandstones separated by faults with large displacement usually yield waters with substantially different salinities owing to the markedly different thermal and pressure gradients across the faults that act as barriers to fluid movement.

Morton, R.A.; Garrett, C.M. Jr.; Posey, J.S.; Han, J.H.; Jirik, L.A.

1981-11-01

430

CD163 binding to haptoglobin-hemoglobin complexes involves a dual-point electrostatic receptor-ligand pairing.  

PubMed

Formation of the haptoglobin (Hp)-hemoglobin (Hb) complex in human plasma leads to a high affinity recognition by the endocytic macrophage receptor CD163. A fast segregation of Hp-Hb from CD163 occurs at endosomal conditions (pH <6.5). The ligand binding site of CD163 has previously been shown to involve the scavenger receptor cysteine-rich (SRCR) domain 3. This domain and the adjacent SRCR domain 2 of CD163 contain a consensus motif for a calcium-coordinated acidic amino acid triad cluster as originally identified in the SRCR domain of the scavenger receptor MARCO. Here we show that site-directed mutagenesis in each of these acidic triads of SRCR domains 2 and 3 abrogates the high affinity binding of recombinant CD163 to Hp-Hb. In the ligand, Hp Arg-252 and Lys-262, both present in a previously identified CD163 binding loop of Hp, were revealed as essential residues for the high affinity receptor binding. These findings are in accordance with pairing of the calcium-coordinated acidic clusters in SRCR domains 2 and 3 with the two basic Arg/Lys residues in the Hp loop. Such a two-point electrostatic pairing is mechanistically similar to the pH-sensitive pairings disclosed in crystal structures of ligands in complex with tandem LDL receptor repeats or tandem CUB domains in other endocytic receptors. PMID:23671278

Nielsen, Marianne Jensby; Andersen, Christian Brix Folsted; Moestrup, Søren Kragh

2013-05-13

431

Light scattering of degenerate fermions  

NASA Astrophysics Data System (ADS)

We report on progress in measuring the suppression of resonant light scattering in a gas of degenerate fermions. A gas of trapped degenerate fermions is expected to exhibit narrower optical linewidths and longer excited state lifetimes than single atoms when the Fermi energy is larger than the photon recoil energy [1-3]. In this case, the number of available states into which a scattered atom can recoil is significantly reduced due to the filling of the Fermi sea. We produce a degenerate gas of 4x10^4 ultra-cold fermionic ^40K atoms by sympathetic cooling with bosonic ^87Rb in a micro-magnetic chip trap. The atoms can then be loaded into a tight dipole trap just above the surface of the chip and probed with a near resonance laser pulse. [1] Th. Busch, J. R. Anglin, J. I. Cirac, and P. Zoller, Europhys. Lett. 44, 1 (1998). [2] B. DeMarco and D. S. Jin, Phys. Rev. A 58, R4267 (1998). [3] J. Javanainen and J. Ruostekosky, Phys. Rev. A 52, 3033 (1995). Work supported by NSERC, CFI, OIT, Research Corporation, and PRO.

Aubin, S.; Leblanc, L. J.; Myrskog, S.; Extavour, M. H. T.; McKay, D.; Stummer, A.; Thywissen, J. H.

2006-05-01

432

A pilot study characterizing real time exposures to particulate matter and carbon monoxide from cookstove related woodsmoke in rural Peru  

NASA Astrophysics Data System (ADS)

Nearly half of the world's population is exposed to household air pollution (HAP) due to long hours spent in close proximity to unvented cooking fires. We aimed to use PM2.5 and CO measurements to characterize exposure to cookstove generated woodsmoke in real time among control (n = 10) and intervention (n = 9) households in San Marcos, Cajamarca Region, Peru. Real time personal particulate matter with an aerodynamic diameter ?2.5 ?m (PM2.5), and personal and kitchen carbon monoxide (CO) samples were taken. Control households used a number of stoves including open fire and chimney stoves while intervention households used study-promoted chimney stoves. Measurements were categorized into lunch (9 am-1 pm) and dinner (3 pm-7 pm) periods, where applicable, to adjust for a wide range of sampling periods (2.8-13.1 h). During the 4-h time periods, mean personal PM2.5 exposures were correlated with personal CO exposures during lunch (r = 0.67 p = 0.024 n = 11) and dinner (r = 0.72 p = 0.0011 n = 17) in all study households. Personal PM2.5 exposures and kitchen CO concentrations were also correlated during lunch (r = 0.76 p = 0.018 n = 9) and dinner (r = 0.60 p = 0.018 n = 15). CO may be a useful indicator of PM during 4-h time scales measured in real time, particularly during high woodsmoke exposures, particularly during residential biomass cooking.

Commodore, Adwoa A.; Hartinger, Stella M.; Lanata, Claudio F.; Mäusezahl, Daniel; Gil, Ana I.; Hall, Daniel B.; Aguilar-Villalobos, Manuel; Naeher, Luke P.

2013-11-01

433

Tissue-resident Macrophages Protect the Liver From Ischemia Reperfusion Injury via a Heme Oxygenase-1-Dependent Mechanism  

PubMed Central

Kupffer cells are the resident macrophage population of the liver and have previously been implicated in the pathogenesis of hepatic ischemia–reperfusion injury (IRI). Kupffer cells are the major site of expression of hepatic heme oxygenase-1 (HO-1), which has been shown to have anti-inflammatory actions and to protect animals and cells from oxidative injury. Kupffer cells and circulating monocytes were selectively ablated using liposomal clodronate (LC) in the CD11b DTR mouse before induction of hepatic ischemia. Kupffer cell depletion resulted in loss of HO-1 expression and increased susceptibility to hepatic IRI, whereas ablation of circulating monocytes did not affect IRI phenotype. Targeted deletion of HO-1 rendered mice highly susceptible to hepatic IRI. In vivo, HO-1 deletion resulted in pro-inflammatory Kupffer cell differentiation characterized by enhanced Ly6c and MARCO (macrophage receptor with collagenous structure) expression as well as decreased F4/80 expression, mirrored by an expansion in immature circulating monocytes. In vitro, HO-1 inhibition throughout macrophage differentiation led to increased cell numbers, and pro-inflammatory Ly6c+ CD11c? F4/80? phenotype. These data support a critical role for tissue-resident macrophages in homeostasis following ischemic injury, and a co-dependence of HO-1 expression and tissue-resident macrophage differentiation.

Devey, Luke; Ferenbach, David; Mohr, Elodie; Sangster, Kathryn; Bellamy, Christopher O; Hughes, Jeremy; Wigmore, Stephen J

2008-01-01

434

Impact-induced tensional failure in rock  

NASA Astrophysics Data System (ADS)

Planar impact experiments were employed to induce dynamic tensile failure in Bedford limestone. Rock disks were impacted with aluminum and polymethyl methacralate flyer plates at velocities of 10 to 25 m/s. This resulted in tensile stresses in the range of 11 to 160 MPa. Tensile stress durations of 0.5 and 1.3 microsec induced microcrack growth which in many experiments were insufficient to cause complete spalling of the samples. Velocity reduction, and by inference microcrack production, occurred in samples subjected to stresses above 35 MPa in the 1.3-microsec PMMA experiments and 60 MPa in the 0.5-microsec aluminum experiments. Apparent fracture toughnesses of 2.4 and 2.5 MPa m exp 1/2 are computed for the 1.3- and 0.5-microsec experiments. Three-dimensional impact experiments were conducted on 20 cm-sized blocks of Bedford limestone and San Marcos gabbro. Compressional wave velocity deficits up to 50-60 percent were observed in the vicinity of the crater. The damage decreases as about r exp -1.5 from the crater, indicating a dependence on the magnitude and duration of the tensile pulse.

Ahrens, T. J.; Rubin, A. M.

1993-01-01

435

The Different Behaviour of the Neutral Upper-Atmosphere in Periods Dominated by Corotating Currents and by CME-s Respectively  

NASA Astrophysics Data System (ADS)

The paper is based on total density data derived from the measurements of the CACTUS accelerometer from 1975 to 1979. The data were separated into two groups: the first (1975-1977) during solar minimum dominated by recurrent corotating streams originating from corona holes; the second (1977-1979) during rising solar activity dominated by coronal mass ejections (CME). Comparing the measurements with corresponding model data (CIRA'86) the following results have been obtained: 1/ the dependence of the residuals on Dst is steeper in the first than in the second period; 2/ the variance of the residuals is larger in the first than in the second period; 3/ there is a definite diurnal dependence of the residuals - the scatter being larger at night - in both cases, but it is stronger in the first period. We suppose that in the first period the larger variance is due to a stronger auroral electrojet in connection with recurrent streams and it launches stronger gravity waves. The hypothesis is supported by the results in our previous papers demonstrating - on the basis of measurements by the San Marco V satellite accelerometer - that sudden density variations like neutral density decreases or giant waves have also a maximum occurrence frequency at night.

Illés-Almár, E.; Almár, I.; Bencze, P.

436

Shanghai Delta Complex  

SciTech Connect

The upper Eocene Yegua Formation expands dramatically across a regional system of growth faults into an area generally 12-15 km wide, extending at least from the western edge of the Houston sale dome basin to the San Marcos arch. Within this area, the expanded Yegua trend has yielded, since 1982, at least seven noteworthy discoveries: Toro Grande and Lost Bridge fields in Jackson County, and Black Owl, Shanghai, Shanghai East, El Campo, and Phase Four fields in Wharton County. During each of several postulated Yegua sea level drops, this flexure became a focal point for deltaic deposition of excellent reservoir-quality sands. Shanghai, Shanghai East, and El Campo fields are located within what the writers have labeled the ''Shanghai delta complex.'' Integration of seismic and well data in this vicinity shows a marked increase in the expansion indices of growth faults, and moderately thick progradational sand sequences have accumulated immediately downthrow. This structural-stratigraphic pattern, as well as internal bedding characteristics and other lithologic data observed, is believed typical of deltas deposited along the Yegua shelf margin.

Hart, R.E.; Hoffman, P.F.; Parker, R.W.

1988-01-01

437

Crustal Rock: Recorder of Oblique Impactor Meteoroid Trajectories  

NASA Astrophysics Data System (ADS)

Oblique impact experiments in which 2g lead bullets strike samples of San Marcos granite and Bedford limestone at 1.2 km/s induce zones of increased crack density (termed shocked damage) which result in local decreases in bulk and shear moduli that results in maximum decreases of 30-40% in compressional and shear wave velocity (Budianski and O'Connell). Initial computer simulation of oblique impacts of meteorites (Pierazzo and Melosh) demonstrate the congruence of peak shock stress trajectory with the pre-impact meteoroid trajectory. We measure (Ai and Ahrens) via multi-beam (˜ 300) tomographic inversion, the sub-impact surface distribution of damage from the decreases in compressional wave velocity in the 20 x 20 x 15 cm rock target. The damage profiles for oblique impacts are markedly asymmetric (in plane of pre-impact meteoroid pre-impact trajectory) beneath the nearly round excavated craters. Thus, meteorite trajectory information can be recorded in planetary surfaces. Asymmetric sub-surface seismic velocity profiles beneath the Manson (Iowa) and Ries (Germany) impact craters demonstrate that pre-impact meteoroid trajectories records remain accessible for at least ˜ 10 ^ 8 years.

Ahrens, Thomas J.

2005-07-01

438

Two proposals to improve the CIRA 86 model in the equatorial region.  

NASA Astrophysics Data System (ADS)

The paper intends to draw the attention of future authors of the planned CIRA model to two effects discovered by us previously; they should be taken into account both in the description of the total density and in the physical connection between the magnetosphere and the neutral upper-atmosphere. The first is the night time density maximum - even in geomagnetically quiet periods - which is probably connected with compressional heating due to global winds originating from the subsolar point. The second is the dependence of the total density residuals (with respect to the CIRA'86 model values) on Dst, which might be the consequence of heating by particles precipitating from the ring current. This effect hints at an additional magnetospheric heating (besides the well-known auroral heating in the main phase of geomagnetic storms) which acts during the recovery phase of the storms as well with a maximum near the equator (and probably also at the SAR arc region). The equatorial source may be connected with ions, neutralized by charge exchange, precipitating from the ring current and having a velocity vector directed towards the Earth. The SAR arc source - which we postulate, but could not investigate by the CACTUS or San Marco measurements because of the low inclination of the satellites - may be due to charged particles precipitating from the ring current. A correction is suggested to the CIRA'86 model decreasing all residuals: the new multiplicating function describes both additional heating effects.

Almar, I.; Illes-Almar, E.

439

Importance of Large-Scale Wave Structure to Equatorial Spread F  

NASA Astrophysics Data System (ADS)

There is mounting evidence that large-scale wave structure (LSWS) is a more direct precursor of equatorial spread F (ESF) than the post-sunset rise (PSSR) of the equatorial F layer. Unambiguous experimental evidence, though limited, come from measurements by ALTAIR, a fully steerable incoherent-scatter radar, in situ measurements by low-altitude satellites in low-inclination orbits (AE-E, San Marco D), and total electron content measurements using satellites in low-inclination orbits. Less direct evidence is contained in seemingly extraneous traces in equatorial ionograms, which appear to be associated with LSWS and ESF. Clearly, a demonstration that these traces are indeed a direct consequence of LSWS is pivotal because such a demonstration would allow use of the extensive database of equatorial ionograms that exists to argue conclusively that LSWS is a central player in ESF generation. A demonstration of this kind will be presented, together with a description of experiments proposed for the Pacific sector, which involve the C/NOFS satellite, and how they will increase substantially our understanding of LSWS and ESF.

Tsunoda, R. T.

2008-12-01

440

Phylogeography and conservation genetics of a distinct lineage of sunfish in the cuatro ciénegas valley of Mexico.  

PubMed

The valley of Cuatro Ciénegas, an aquatic oasis located in the Mexican Chihuahuan Desert, exhibits the highest level of endemism in North America and is a Mexican National Protected Area. However, little is known about the evolutionary distinctiveness of several vertebrate species present in the Cuatro Ciénegas valley. We conducted a phylogeographic study using mitochondrial haplotypes from the centrarchid fish Lepomis megalotis to determine if the populations found within the valley were evolutionarily distinct from populations outside the valley. We also examined if there was evidence of unique haplotypes of this sunfish within the valley. Genetic divergence of L. megalotis suggests populations within the valley are evolutionarily unique when compared to L. megalotis outside the valley. Significant mitochondrial sequence divergence was also discovered between L. megalotis populations on either side of the Sierra de San Marcos that bisects the valley. Our results reinforce previous studies that suggest the organisms occupying aquatic habitats not only within Cuatro Ciénegas but also in each of the two lobes of the valley generally deserve independent consideration during management decisions. PMID:24130826

Coghill, Lyndon M; Hulsey, C Darrin; Chaves-Campos, Johel; García de Leon, Francisco J; Johnson, Steven G

2013-10-10

441

Expanded Yegua  

SciTech Connect

The upper Eocene Yegua Formation expands dramatically across a regional flexure generally 12-15 km wide. During each of several postulated Yegua sea level drops, this flexure became a focal point for deltaic deposition of good to excellent reservoir-quality sands. From the western edge of the Houston salt dome basin to the San Marcos arch, this trend has yielded, since 1982, at least seven noteworthy discoveries: Toro Grande and Lost Bridge fields in Jackson County, and Black Owl, Shanghai, Shanghai East, El Campo, and Phase Four fields in Wharton County, Texas. El Campo field in Wharton County, Texas, was discovered in December 1985 by Ladd Petroleum Corporation with the drilling of the Ladd Petroleum 1 Popp well. Mud logs acquired while drilling indicated that a very sandy reservoir, with encouraging quantities of natural gas and condensate had been encountered. Subsequent open-hold logging generated more questions than answers about the prospective sand section. Additional open hole logs (EPT/ML,SHDT) were run to identify what turned out to be an extremely laminated sand-shale sequence over 400 ft thick. Subsequent development drilling and the acquisition of a 120 ft whole core provided valuable data in analyzing this prolific, geopressured natural gas and condensate Yegua reservoir. Whole-core data, open-hole logs, and computer logs were integrated to develop petro-physical evaluation procedures and to determine the environment of deposition. El Campo field is believed to represent an extremely thick, delta front slope to distal delta front facies.

Hart, R.E.; Grayson, S.; Benes, J.

1988-01-01

442

The PISCES Project: Bringing Graduate Students into Elementary School Classrooms  

NASA Astrophysics Data System (ADS)

The PISCES Project (Partnerships Involving the Scientific Community in Elementary Schools) is an NSF G-K12 funded initiative that is in its fouth year of funding. In the Project graduate students from San Diego State University, California State University San Marcos, and University of California San Diego partner with San Diego area elementary school teachers to immerse students in hands-on standards-based elementary science curriculum. The project has grown from 24 teachers representing 7 school districts and 10 Science Corps Fellows (graduate students), to over 100 teachers from 14 districts and 22 Fellows. During the second project year, Fellows interacted for over 10,000 hours with K-12 students. This close interaction, coupled with high quality, ongoing professional development for teachers and intensive outreach efforts has resulted in increased student enthusiasm for science from K-6 students, an appreciation of the importance of high quality science education from Fellows, and improved commitment by teachers to utilize hands-on science materials.

Reif, C.

2002-12-01

443

Tectostratigraphic evidence for Late Paleozoic Pacific plate collision and post-Upper Jurassic transpression in northeastern Chihuahua, Mexico  

SciTech Connect

The rocks of Mina Plomosas, Chihuahua include a structurally complex association of Ordovician to Permian and Upper Jurassic strata. The structural deformation has historically been considered as two-fold including late Paleozoic compression associated with the collision of North and Afro-South America followed by loosely defined Laramide influences. These interpretations, however, are inconsistent with respect to timing, direction and style of deformation and the tectostratigraphic development of northeastern Mexico. Paleozoic strata which are folded, overturned and thrusted to the southwest are in opposition to the predicted, and elsewhere observed, northwestward compression. More likely, deformation is the result of late Paleozoic, northeastward directed Pacific plate collision causing underthrusting of the Paleozoic strata. Typical Laramide deformations are also in question. Upper Jurassic La Casita-equivalent rocks are twisted into distally thrusted, arcuate, en echelon, omega-folded anticlines which rotate into the trend of the suspected continuation of the oblique strike-slip San Marcos Fault. Such structures are diagnostic of transpressive mobile belts. The implications of late Paleozoic Pacific plate interactions and post-middle Paleozoic transpressive tectonics are that northern Mexico was located to the northwest during the Paleozoic and was repositioned following deposition of Upper Jurassic strata.

Montgomery, H.A.

1985-01-01

444

Midnight density and temperature maxima, and thermospheric dynamics in Whole Atmosphere Model simulations  

NASA Astrophysics Data System (ADS)

Hydrostatic expansion in a gravity field of an atmospheric layer with elevated temperatures, such as the long known thermospheric midnight temperature maximum (MTM), results in a total mass density increase at a given altitude above the layer. Long-term simulations with the Whole Atmosphere Model reveal a noticeable midnight density maximum (MDM), appropriately lagging behind the MTM at the same height. The MDM magnitude, timing, and variability are in good agreement with available in-situ observations. Of particular importance is the observation of a downward phase progression of the MDM peak time obtained from the San Marco satellites and closely reproduced in the model results. This is consistent with the suggestion, made over 30 years ago, that both the MTM and MDM are driven by tidal waves, in particular, the terdiurnal tide propagating upward from the lower atmosphere and interacting with a diurnally varying ion drag. The accompanying wind variations are also found in good agreement with radar observations, which first related them to the nighttime ionosphere collapse in the early 1970s.

Akmaev, R. A.; Wu, F.; Fuller-Rowell, T. J.; Wang, H.; Iredell, M. D.

2010-08-01

445

Effects of shock-induced cracks on the ultrasonic velocity and attenuation in granite  

NASA Astrophysics Data System (ADS)

Measurements of the compressional wave velocity and the attenuation coefficients of 1-cm cubes were conducted. Samples were taken at various radii and depths beneath a 20 × 20 × 15 cm San Marcos granite block, impacted by a lead bullet at a velocity of 1200 m/s. The damage parameters of the cubes are calculated from the measured preimpact and postimpact P wave velocities, Vp0 and Vp, and the crack density is inverted from the measured P wave velocities. The anisotropic orientation of cracks is more obvious from the attenuation than crack density and damage parameters calculated from the ultrasonic velocity. P wave velocity and the normalized distance from the impact point follow an exponential decay relation. Other properties, such as the damage parameter, crack density, and attenuation coefficient, are expressed by a power law decay with distance. The damage parameter and attenuation coefficients are approximately linearly related. The slope of the linear fitting results in directions normal to the crack orientation is about twice the value in direction along the crack orientation. The attenuation coefficient is found to be a more useful parameter than elastic velocity in describing the anisotropic orientation of cracks.

Ai, Huirong A.; Ahrens, Thomas J.

2007-01-01

446

Further results referring to the neutral density depletions attributed to plasma bubbles  

NASA Astrophysics Data System (ADS)

The interaction between the ionized and neutral components of the upper atmosphere (ion drag, air drag) is not limited to the large-scale motions, but it works also among the small-scale motions. This is demonstrated by neutral density depletions (NDD) revealed by us in the neutral density measurements of great time resolution of the San Marco V satellite. The morphological and statistical investigations indicate that NDDs and plasma bubbles have similar characteristics. On the other hand, according to modelling, depletions of the total neutral density discovered by us below a height of about 350 km (collision-dominated case) in the vicinity of the equator might be really due to equatorial plasma bubbles. The relation of the NDDs to plasma bubbles (ion density depletions) is studied partly by direct comparison and modelling, partly indirectly by the distribution of the occurrence of NDDs according to local solar time, to season, to height and to longitude. All of them are arguing in favour of the plasma bubble origin of the NDDs.

Bencze, P.; Almár, I.; Illés-Almár, E.

2000-10-01

447

Iterative atmospheric parameters estimation of the tropical atmosphere  

NASA Astrophysics Data System (ADS)

This work describes an iterative algorithm capable of determining the atmospheric parameters (temperature and water vapour profiles) by using NOAA ATOVS data and "in situ" observations currently collected at the Broglio Space Centre (BSC, located in Malindi-Kenya, 40 E, 3 S) of the Centro di Ricerca Progetto San Marco (CRPSM) of the University of Rome "La Sapienza" (Italy). The method is based on the usual approach to the problem of retrieving atmospheric characteristics: 1. a forward model (using the Modtran atmospheric code); 2. a numerical method for solving systems of non-linear equations (by means of a Broyden"s Quasi-Newton methods and a regularization method coupled with a preconditioning to computing stabilized solutions to the ill-posed problems). The retrieval method for the temperature and water vapour is discussed in detail; comparisons are also made with available co-located atmospheric information from balloon-based soundings. The aim of this paper is to evaluate the accuracy of the estimate of the tropical atmosphere parameters using a retrieval algorithm developed by authors, based on Broyden"s method for systems of non-linear equations.

Longo, Francesco; Laneve, Giovanni

2004-02-01

448

Near-Equatorial Electrons as Measured onboard the MirSpace Station  

NASA Astrophysics Data System (ADS)

Some results of studying the electrons with energies of tens to hundreds of keV at the low and near- equatorial geomagnetic latitudes by using the instruments Sprut-V and Ryabina-2 onboard the Mirspace station in 1991 are presented. It is found that at L< 1.2 the enhanced electron fluxes are sporadically detected, being localized within three longitudinal intervals, 180° W-0°-15° E, 90°- 120° E, and 160° E-180°-135° W. The most intense electron fluxes are observed at the lower edge of the near-equatorial boundary of the inner radiation belt on longitudes of the South Atlantic Anomaly between 14 and 20 h MLT. The occurrence of electron bursts does not depend on the geomagnetic disturbance level. A hardening of the electron spectra is observed near the geomagnetic equator. At L< 1.1, the more energetic particles are located closer to the geomagnetic equator. The results are compared with the data on the low-frequency waves and fields at low and near-equatorial latitudes obtained by the Ariel-4and San Marco Dsatellites, as well as by the spacecraft and ground-based observations of the thunderstorm global distribution. The thunderstorms are considered as a possible source of electron production near the geomagnetic equator.

Bratolyubova-Tsulukidze, L. S.; Grachev, E. A.; Grigoryan, O. R.; Nechaev, O. Yu.

2001-11-01

449

{GUVI} Observations of Night Time Ionospheric Morphology  

NASA Astrophysics Data System (ADS)

The TIMED spacecraft is currently mapping the nighttime Earth disk and limb with the Global Ultraviolet Imager (GUVI). Images are made in the OI 135.6 nm line which is excited by the recombination of O+ ions. The intensity in these disk images is related to the total electron content of the ionosphere and density profiles can be recovered from the limb scans. Prominent in these images are UV signatures of the Equatorial Anomaly that was first imaged by the DE-1 satellite. Data is currently available from essentially the same local time and is suitable for the study of the longitudinal dependence of the Anomalies. It is known that the Earth's ionosphere shows the occurrence large longitudinal and latitudinal variations in the F-region plasma density that change with season and solar cycle. These plasma density fluctuations occur over a very large range of scale sizes and have been observed by for about three decades by satellites [e.g., ISIS 2, ESRO-4, Atmosphere Explorers, Dynamics Explorer-2, San Marco II, DMSP, etc.]. Their morphology, origin, day-to-day variability, and predictability are still not well understood. The GUVI night data that gives insight into these largest scale structures will be discussed.

Swenson, C. M.; Christensen, A. B.; Walterscheid, R. J.; Paxton, L. J.; Meng, C. I.; Craven, J. D.; Meier, R. R.; Strickland, D. J.; Crowley, G.

2002-05-01

450

Exposing High School Students to High Technology *  

NASA Astrophysics Data System (ADS)

SWT is attempting to address two critical areas of concern for Texas: 1) the increasing shortage of home-grown scientists and engineers being educated in American universities, and 2) the continuing underenrollment of women and minorities in these programs. Part of the solution requires engaging high school students in interesting activities relating to materials science and engineering. This provides them concrete, hands-on experiences to explore their own technical interests, which could influence their approaching college/career choices. To accomplish this, SWT has joined with San Marcos High School in just such a program. In the initial efforts, advanced-placement students were brought to SWT for a full day of thin film materials fabrication and electronic device testing. Working in teams, the students fabricated thin film resistors in the SWT Microfabrication Lab. In the Electronics Lab, students characterized their devices. The results of this preliminary effort will be discussed. * Supported in part by a US Dept. of Education Smaller Learning Communities grant.

Spencer, Gregory; Geerts, Wilhemus; Kidd, Gregory; Stouder, Gene; Marshall, Bonnie; Sarzoza, John

2003-03-01

451

Iterative atmospheric parameters estimationof the tropical atmospere  

NASA Astrophysics Data System (ADS)

This work describes an iterative algorithm capable of determining the atmospheric parameters (temperature, water vapor and ozone profiles) by using the observations currently collected at the BSC Station (Malindi -Kenya, 40° E, 3° S) of the Centro di Ricerca Progetto San Marco (CRPSM) of the University of Rome "La Sapienza" (Italy), by using the NOAA ATOVS data. The method is based on the usual approach to the problem of retrieving atmospheric characteristics:- a forward model (using the FASCODE atmospheric code);- a numerical method to find a solution (by means of the Least SquareEstimation (LSE), the Extended Kalman Filter (EKF) and a regularizationmethod for computing stabilized solutions to the ill-posed problems). Moreover, the retrieval method for the temperature, water vapor and ozone is discussed in detail; comparisons are also made with available co-located atmospheric informations from AAPP-ICI software and balloon based soundings. The aim of this paper is to evaluate the accuracy of the estimate of the tropical atmosphere parameters using an autonomous ret rieval algorithm, based on a modified LSE technique, introducing a gain computed from Kalman theory.

Longo, F.; Laneve, G.; Castronuovo, M.

452

Web Services for Astronomical Databases: Connecting AIPS++ to the Virtual Observatory  

NASA Astrophysics Data System (ADS)

In the year 2010, the NRAO will be operating four of the world's most powerful radio telescopes: GBT, EVLA, VLBA, and ALMA (with international partnership). Multi-Terabyte data sets will quickly accumulate with a rate of twenty-five to fifty Megabytes of data per second generated by ALMA and EVLA each. It will be imperative for scientists to possess software capable of automated data reduction, image synthesis, and archiving. With the evolution of AIPS++ and the recently developed concepts of the image pipeline, the participation of the NRAO in the virtual observatories of the future is now on the horizon giving birth to the need for fast archive access and web service development in AIPS++. When the software package began over 10 years ago, it was not designed for data transfer via the web. In response to the demands of the NVO, we have designed and implemented an application layer that will allow our system to communicate with others. Sponsored by the NRAO and California State University, San Marcos.

Douthit, M. C.

2002-12-01

453

Digital Watersheds and Water Observations Data  

NASA Astrophysics Data System (ADS)

A digital watershed requires both a description of the physical environment through which water flows and a description of the flow of the water itself. Geographic information systems are appropriate for describing the physical environment. The Arc Hydro geographic data models for surface and groundwater systems are one way by which the physical environment of a watershed can be described in a GIS, and OGC web feature services provide a mechanism for accessing such data through the internet.. The CUAHSI Observations data model is useful for describing time series of water observations measured at point locations, such as streamflow, water quality, groundwater levels and climate data. CUAHSI WaterML web services provide access to such time series data through the internet. The combination of web feature services and WaterML web services provides both geographic and observational data services for digital watersheds. This paper will present an example application of such services using the San Marcos river basin and its underlying Edwards Aquifer in Texas as an example.

Maidment, D. R.; Whiteaker, T. L.

2008-12-01

454

Vida de leprosa: the testimony of a woman living with Hansen's disease in the Peruvian Amazon, 1947.  

PubMed

This is the narrative of a patient made before, during and after being incarcerated in an agricultural colony in the Peruvian Amazon. In a vivid style, it narrates the decay of the body, the stigma and the compulsive segregation, as well as the hope for a better life. It is the perspective of a patient, something that is difficult to find when researching the history of health. The original publication was possible thanks to the German physician Maxime H. Kuczynski-Godard and thanks to the Institute of Social Medicine of the University of San Marcos that was directed by the professor of hygiene Carlos Enrique Paz-Soldán. We have used this publication for this transcription. Kuczynski-Godard was a German medical doctor that arrived in Peru in the mid 1930s and organized valuable activities in the Peruvian jungle as a part of an effort, which eventually failed, of the Peruvian State to colonize, or really to "civilize" the Amazon. PMID:14650423

Cueto, Marcos; de la Puente, José Carlos

2003-01-01

455

Strain evaluation of strengthened concrete structures using FBG sensors  

SciTech Connect

Fibre-optic Bragg Grating (FBG) sensor presents a great deal of potential in monitoring the internal status of the concrete structures after repairing or strengthening by an external adhered reinforcement. It can be used in a variety of configurations ranging from pointwise to multi-point strain measurement in order to investigate the strain distribution of the structures. In this paper, an experimental investigation on the rectangular notched-concrete beam, which was strengthened by glass fibre composites with the embedment of multiplexing FBG sensors is presented. Three point bending test was performed to investigate the strain profile of the specimen. Frequency modulated continuous wave (FMCW) technique was used to measure the strain variation of the fibre-grating regions. The results give a good agreement with the electrical resistance strain gauge in early loading condition. The difference of the strain-measuring results between the strain-gauge and FBG sensor was increased when further increasing the applied load. It was suspected that the micro/marco cracks occurred on the concrete surface and that the externally bonded strain-measuring device cannot be detected.

Lau Kintak; Zhou Limin [Department of Mechanical Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon (Hong Kong); Ye Lin [Department of Mechanical and Mechatronic Engineering, University of Sydney, Sydney (Australia)

1999-12-02

456

Neutron Sources in Stellar Carbon Burning  

NASA Astrophysics Data System (ADS)

The possibility of a high temperature s-process during the carbon burning phase in late stellar evolution depends critically on possible neutron sources. In this context the following alpha capture reactions are being discussed, ^17O(?,n), ^18O(?,n), ^22Ne(?,n), ^25Mg(?,n), and ^26Mg(?,n). Their effective contribution to the neutron production depends on the abundance of the various seed nuclei, which in turn depend critically on the alpha or proton production in the ^12C+^12C fusion process; it also depends on the reaction cross sections or rates of these processes at carbon burning temperatures. We have studied the reaction cross sections at low energies at the Notre Dame KN accelerator using a new ^3He neutron detector array. The results will be shown and discussed in the context of late stellar evolution. In collaboration with Andreas Best, University of Notre Dame; Sascha Falahat, University of Mainz, Germany; Marco Pignatari, Keele University, UK; and Michael Wiescher, University of Notre Dame.

Goerres, Joachim

2009-10-01

457

Violencia en el noviazgo y salud mental en estudiantes universitarios mexicanos.  

PubMed

Antecedentes: En las últimas dos décadas, ha aumentado el interés por la promoción de la salud en el sector educativo superior, a través del programa "Universidades Saludables" promovido por la Organización Mundial de la Salud (OMS). Es importante reconocer las necesidades relacionadas con la salud de los integrantes de la comunidad universitaria, así como reflexionar sobre las acciones dirigidas a cubrirlas. Uno de los problemas prioritarios respecto a la salud mental de los jóvenes universitarios es la violencia en el noviazgo. Considerando lo anterior, los objetivos del presente estudio fueron: evaluar la violencia en el noviazgo, la sintomatología depresiva y la autoestima en estudiantes universitarios; estudiar la relación entre la violencia, la depresión y la autoestima; y promover la implementación de programas preventivos entre la comunidad universitaria. Métodos: Se realizó un estudio transversal y descriptivo con las respuestas de 729 estudiantes universitarios, aplicando el "Conflict in Adolescent Dating Relationship Inventory," el Inventario de Depresión de Beck y el Inventario de Coopersmith para evaluar la autoestima. Resultados: Los resultados mostraron una elevada prevalencia de violencia en los jóvenes universitarios, particularmente verbal-emocional (75%). Las agresiones fueron de carácter bidireccional, tanto hombres como mujeres cometieron y sufrieron la violencia. La conducta violenta se asoció con la baja autoestima en las mujeres y con síntomas depresivos en ambos sexos. Conclusiones: Desde el enfoque del programa "Universidades Saludables," es importante que las instituciones de educación superior sean promotoras de la salud mediante la creación y difusión del conocimiento, la formación de recursos humanos y la promoción de la organización comunitaria. Los resultados del estudio indican la necesidad de desarrollar programas educativos orientados a la prevención de la violencia, al manejo de emociones y a la resolución de conflictos. PMID:23986388

Lazarevich, Irina; Irigoyen Camacho, María E; Sokolova, Anna V; Delgadillo Gutiérrez, Hector J

2013-09-01

458

The Balloon-borne Large Aperture Submillimeter Telescope: BLAST  

NASA Astrophysics Data System (ADS)

The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) is a suborbital surveying experiment designed to study the evolutionary history and processes of star formation in local galaxies (including the Milky Way) and galaxies at cosmological distances. The BLAST continuum camera, which consists of 270 detectors distributed between three arrays, observes simultaneously in broadband (30%) spectral windows at 250, 350, and 500 microns. The optical design is based on a 2 m diameter telescope, providing a diffraction-limited resolution of 30" at 250 microns. The gondola pointing system enables raster mapping of arbitrary geometry, with a repeatable positional accuracy of 30"; postflight pointing reconstruction to <5" rms is achieved. The onboard telescope control software permits autonomous execution of a preselected set of maps, with the option of manual override. On this poster, we describe the primary characteristics and measured in-flight performance of BLAST. BLAST performed a test flight in 2003 and has since made two scientifically productive long-duration balloon flights: a 100 hour flight from ESRANGE (Kiruna), Sweden to Victoria Island, northern Canada in 2005 June; and a 250 hour, circumpolar flight from McMurdo Station, Antarctica in 2006 December. The BLAST collaboration acknowledges the support of NASA through grants NAG5-12785, NAG5-13301, and NNGO-6GI11G, the Canadian Space Agency (CSA), the Science and Technology Facilities Council (STFC), Canada's Natural Sciences and Engineering Research Council (NSERC), the Canada Foundation for Innovation, the Ontario Innovation Trust, the Puerto Rico Space Grant Consortium, the Fondo Institucional para la Investigacion of the University of Puerto Rico, and the National Science Foundation Office of Polar Programs.

Truch, Matthew D. P.; Ade, P. A. R.; Bock, J. J.; Chapin, E. L.; Chung, J.; Devlin, M. J.; Dicker, S.; Griffin, M.; Gundersen, J. O.; Halpern, M.; Hargrave, P. C.; Hughes, D. H.; Klein, J.; MacTavish, C. J.; Marsden, G.; Martin, P. G.; Martin, T. G.; Mauskopf, P.; Netterfield, C. B.; Olmi, L.; Pascale, E.; Patanchon, G.; Rex, M.; Scott, D.; Semisch, C.; Thomas, N. E.; Tucker, C.; Tucker, G. S.; Viero, M. P.; Wiebe, D. V.

2009-01-01

459

A quantitative synthesis of the medicinal ethnobotany of the Malink? of Mali and the Ash?ninka of Peru, with a new theoretical framework  

PubMed Central

Background Although ethnomedically and taxonomically guided searches for new medicinal plants can improve the percentage of plants found containing active compounds when compared to random sampling, ethnobotany has fulfilled little of its promise in the last few decades to deliver a bounty of new, laboratory-proven medicinal plants and compounds. It is quite difficult to test, isolate, and elucidate the structure and mechanism of compounds from the plethora of new medicinal plant uses described each year with limited laboratory time and resources and the high cost of clinical trials of new drug candidates. Methods A new quantitative theoretical framework of mathematical formulas called "relational efficacy" is proposed that should narrow down this search for new plant-derived medicines based on the hypothesis that closely related plants used to treat closely related diseases in distantly related cultures have a higher probability of being effective because they are more likely to be independent discoveries of similar plant compounds and disease mechanisms. A prerequisite to this hypothesis, the idea that empirical testing in traditional medicine will lead to choosing similar medicinal plants and therefore the medicinal flora of two distant cultures will prove to be more similar than their general flora, is tested using resampling statistics on cross-cultural field data of the plants used by the Malinké of Mali and the Asháninka of Peru to treat the diseases malaria, African sleeping sickness, Chagas' disease, leishmaniasis, diabetes, eczema, asthma, and uterine fibroids. Results In this case, the similarity of the medicinal floras is found to be significantly greater than the similarity of the general floras, but only when the diseases in question are grouped into the categories of parasitic and autoimmune diseases. Conclusion If the central theoretical framework of this hypothesis is shown to be true, it will allow the synthesis of medicinal plant information from around the world to pinpoint the species with the highest potential efficacy to take into the laboratory and analyze further, ultimately saving much field and laboratory time and resources. Spanish abstract Las búsquedas que utilizan la etnomedicina y la taxonomía para descubrir nuevas plantas medicinales, pueden aumentar la probabilidad de éxito de encontrar compuestos químicos activos en plantas, en comparación con las búsquedas aleatorias. A pesar de lo anterior, en las últimas décadas, la etnobotánica no ha cumplido con las expectativas de proveer numerosas plantas medicinales y químicos nuevos una vez examinados en el laboratorio. Cada año se describen una plétora de plantas medicinales y sus usos, sin embargo las limitaciones de tiempo y recursos en los laboratorios, unidos al alto coste de los ensayos clínicos de las drogas potenciales, hacen muy difícil probar, aislar, y elucidar la estructura y el mecanismo de los compuestos de estas plantas. Se propone un nuevo marco teórico cuantitativo cuyo fin es focalizar la búsqueda de nueva plantas medicinales. Este marco teórico está basado en la hipótesis que las plantas cercanamente relacionadas, usadas para tratar enfermedades cercanamente relacionadas en culturas distantemente relacionadas, tienen una eficacia potencial más alta, debido a que es más probable que estos hallazgos sean descubrimientos independientes de compuestos químicos similares. Parte de esta hipótesis, que las escogencias racionales se hacen para elegir plantas medicinales similares y que la flora medicinal de dos culturas distantes es más similar que su flora general, se probó usando métodos estadísticos de remuestreo con datos de campo de la comunidad Malinké de Malí y de la Asháninka de Perú, y las enfermedades de paludismo, enfermedad africana del sueño, enfermedad de Chagas, leishmania, diabetes, eczema, asma, y fibromas uterinos. Se encontró, en este caso, que

Bletter, Nathaniel

2007-01-01

460

EDITORIAL: Focus on Dark Matter and Particle Physics  

NASA Astrophysics Data System (ADS)

The quest for the nature of dark matter has reached a historical point in time, with several different and complementary experiments on the verge of conclusively exploring large portions of the parameter space of the most theoretically compelling particle dark matter models. This focus issue on dark matter and particle physics brings together a broad selection of invited articles from the leading experimental and theoretical groups in the field. The leitmotif of the collection is the need for a multi-faceted search strategy that includes complementary experimental and theoretical techniques with the common goal of a sound understanding of the fundamental particle physical nature of dark matter. These include theoretical modelling, high-energy colliders and direct and indirect searches. We are confident that the works collected here present the state of the art of this rapidly changing field and will be of interest to both experts in the topic of dark matter as well as to those new to this exciting field. Focus on Dark Matter and Particle Physics Contents DARK MATTER AND ASTROPHYSICS Scintillator-based detectors for dark matter searches I S K Kim, H J Kim and Y D Kim Cosmology: small-scale issues Joel R Primack Big Bang nucleosynthesis and particle dark matter Karsten Jedamzik and Maxim Pospelov Particle models and the small-scale structure of dark matter Torsten Bringmann DARK MATTER AND COLLIDERS Dark matter in the MSSM R C Cotta, J S Gainer, J L Hewett and T G Rizzo The role of an e+e- linear collider in the study of cosmic dark matter M Battaglia Collider, direct and indirect detection of supersymmetric dark matter Howard Baer, Eun-Kyung Park and Xerxes Tata INDIRECT PARTICLE DARK MATTER SEARCHES:EXPERIMENTS PAMELA and indirect dark matter searches M Boezio et al An indirect search for dark matter using antideuterons: the GAPS experiment C J Hailey Perspectives for indirect dark matter search with AMS-2 using cosmic-ray electrons and positrons B Beischer, P von Doetinchem, H Gast, T Kirn and S Schael Axion searches with helioscopes and astrophysical signatures for axion(-like) particles K Zioutas, M Tsagri, Y Semertzidis, T Papaevangelou, T Dafni and V Anastassopoulos The indirect search for dark matter with IceCube Francis Halzen and Dan Hooper DIRECT DARK MATTER SEARCHES:EXPERIMENTS Gaseous dark matter detectors G Sciolla and C J Martoff Search for dark matter with CRESST Rafael F Lang and Wolfgang Seidel DIRECT AND INDIRECT PARTICLE DARK MATTER SEARCHES:THEORY Dark matter annihilation around intermediate mass black holes: an update Gianfranco Bertone, Mattia Fornasa, Marco Taoso and Andrew R Zentner Update on the direct detection of dark matter in MSSM models with non-universal Higgs masses John Ellis, Keith A Olive and Pearl Sandick Dark stars: a new study of the first stars in the Universe Katherine Freese, Peter Bodenheimer, Paolo Gondolo and Douglas Spolyar Determining the mass of dark matter particles with direct detection experiments Chung-Lin Shan The detection of subsolar mass dark matter halos Savvas M Koushiappas Neutrino coherent scattering rates at direct dark matter detectors Louis E Strigari Gamma rays from dark matter annihilation in the central region of the Galaxy Pasquale Dario Serpico and Dan Hooper DARK MATTER MODELS The dark matter interpretation of the 511 keV line Céline Boehm Axions as dark matter particles Leanne D Duffy and Karl van Bibber Sterile neutrinos Alexander Kusenko Dark matter candidates Lars Bergström Minimal dark matter: model and results Marco Cirelli and Alessandro Strumia Shedding light on the dark sector with direct WIMP production Partha Konar, Kyoungchul Kong, Konstantin T Matchev and Maxim Perelstein Axinos as dark matter particles Laura Covi and Jihn E Kim

Aprile, Elena; Profumo, Stefano

2009-10-01

461

The Relationship Between the Signature of Subducted Sediments in Volcanic Gases and Volatile Flux along the Central American Volcanic Arc  

NASA Astrophysics Data System (ADS)

Volcanic arcs are locations where elements are recycled from the Earth's surface into the mantle. Fluxes of volcanic volatile emissions can vary significantly along a single arc and a fundamental aim of arc-related studies is to quantify these variations and compare them to subduction zone parameters. As part of the Central American arc study, we report N2, He and Ar abundance relationships and N-isotope ratios for 7 volcanic centers in Guatemala to complement on-going studies in Costa Rica. In Guatemala, the arc crust is thicker and older than in Costa Rica and the entire sediment sequence on the down-going plate is likely to contribute to the slab flux. Sulfur dioxide fluxes vary significantly along the arc (2001 measurements): in the Guatemala segment, Fuego and Pacaya emit a total of ~1500 t/day whereas in Costa Rica, Arenal and Poas are emitting only ~190 t/day. The Guatemalan volcanic centers of Amatitlan-Pacaya, Fuego, Moyuta, Tecuamburro, Amatitlan, Zunil and San Marcos have N2/He ratios ranging from 2200 - 8100, typical for arc-related fluids. N2/Ar ratios (40-500) and the high N2/He indicate addition of N2 from subducted sediments or arc crust to a mantle derived component (N2/He < 200). The high N2/He ratios of Guatemala are in contrast to typical mantle-derived N2/He ratios (160 - 600) measured at Poas and Turialba, Costa Rica. Nitrogen isotope ratios for the Guatemalan volcanic centers range from ? 15N = + 1.0‰ for San Marcos to + 5.8‰ for Fuego (? 15N air = 0.0‰ ), indicating a sedimentary nitrogen component. The mantle-derived N2/He ratios for Poas (- 3.0‰ ) are consistent with a more mantle-like ? 15N. In Guatemala, the highest 3He/4He ratios (7.6 for Pacaya and 7.3 Ra for Fuego) correlate with the lowest N2/He ratios (1500 and 2100) and high ? 15N values (+3.8‰ and +5.8‰ ). Mixing relationships (3He/4He and ? 15N) suggest that at Fuego and Pacaya up to 20% of the nitrogen is of subducted sedimentary origin, contrary to Poas and Turialba where the slab derived nitrogen contribute < 1%. These data are consistent with reported B/La ratios of lavas (a key sediment fluid tracer) that are up to 2 in Guatemala and < 0.5 in Costa Rica. N2/He relationships suggest that the slab flux is much more significant at Fuego and Pacaya compared to the Costa Rican volcanic centers. The current quantity of volatile emissions along the arc may be the result of efficient flux melting of the mantle wedge below Guatemala. Further studies of the variability of volatile fluxes in time and space in combination with detailed geochemical and isotopic work on arc volatile discharges are required to better constrain these relationships.

Fischer, T. P.; Zimmer, M. M.; Hilton, D. R.; Shaw, A. M.; Cameron, B. I.; Walker, J. A.; Molina C., E.

2002-05-01

462

Broken formations, melanges and olistostromes in Puerto Plata area (Northern Dominican Republic) as a record of subduction and collisional processes between the Caribbean and North-American plates  

NASA Astrophysics Data System (ADS)

The Northern Cordillera of the Dominican Republic records the (oblique) subduction and collisional processes occurred between the Caribbean and North-American plates during Upper Cretaceous to Lower Paleogene times. The boundary between these two plates can be traced within this range disrupted by an Upper Paleogene to present intense left-lateral strike-slip tectonism, onset after collision. In the western part of the range this boundary might be defined by the Camu fault. In the coastal area of Puerto Plata, located on the northern block of the Camu fault, basement rocks belonging to the subducting plate (the Puerto Plata Basement Complex) and several related units probably formed in an accretionary prism, preserve in a large (300 km2) outcrop of chaotic formations presumably formed (and exhumed) during collision. They include from broken formations and tectonic melanges to olistostromes and other coeval sedimentary deposits. The Puerto Plata Basement Complex (PPBC) consists of highly faulted and dismembered blocks formed by discontinuous but sometimes coherent outcrops of serpentinized or massive peridotite, pods of ultramafic cumulates, massive or banded gabbros and Los Caños Fm, a thick sequence of gross bedded volcaniclastic material with interbedded basaltic (sometimes pillowed) or andesitic flows. All these rocks bear low grade metamorphism and lack a general deformation fabric apart from occasional transformation to mylonites due to localized shearing. The PPBC has been interpreted as a fragment of oceanic crust, belonging to the subducting (North-American) slab that has been exhumed as a tectonic melange or a broken complex. The Imbert Fm, of Palaeocene-Eocene age, is formed by a well bedded succession of white very fine grained porcelaneous tuffs, with eventual intercalations of cherts, limestones and marls that, towards the lower part, is interbedded with volcanic-derived graywackes and limolites, and more occasionally, thick beds of conglomerates and debris. These last ones typically incorporate fragments of serpentized peridotites and blocks of the volcanic rocks identified in the PPBC. The Imbert Fm is also internally disrupted and although not a single clear contact can be observed in the field, it is considered to rest unconformably over the complex, so postdating its exhumation. A separate mappable unit of serpentinitic brecchias has recently been identified mainly distributed along the outer limits of the PPBC but also in several scattered outcrops inside it. The unit is dominantly made of fragments and blocks of serpentinized peridotites, embedded in an abundant matrix of the same composition and includes also blocks of Los Caños and Imbert Fm, as well as other exotic blocks of unknown origin. In the southeastern limit of the complex, close to the Camu fault, there is a particular high concentration of exotic blocks derived from metamorphic rocks (greenschists, anfibolites, marbles and even blueschists) not exposed in any neighbouring areas and thus suggesting a deep-sited, subduction-related, feeding. The basal contact of this unit with the rocks of the PPBC is usually faulted and difficult to observe in the field, but cartographic patterns suggest that it is an unconformity. Outcrops of serpentinitic breccias show a wide variety of internal chaotic organization, from pods of tectonic melanges to the most frequent block-in matrix fabric, but most of them also show evidences of sedimentary rework. In the easternmost part of the PPBC, the serpentinitic brecchias are, in turn, the base of an olistostromic complex widely represented in the region, the San Marcos Fm. The olistostrome includes similar exotic blocks than observed in the serpentinitic brecchias and blocks and olistolithes derived from the PPBC but, mainly, from the Imbert Fm. According to the described relationships, the serpentinitic breccias and San Marcos olistostrome are considered partially coeval and laterally equivalent to the Imbert Fm.

Hernaiz Huerta, Pedro Pablo; Valera Fernando, Pérez; de Los Santos Manuel, Abad; Jacques, Monthel; de Neira Alberto, Díaz

2010-05-01

463

Monitoring the energy-use effects of cool roofs on Californiacommercial buildings  

SciTech Connect

Solar-reflective roofs stay cooler in the sun than solar-absorptive roofs. Such 'cool' roofs achieve lower surface temperatures that reduce heat conduction into the building and the building's cooling load. We monitored the effects of cool roofs on energy use and environmental parameters in six California buildings at three different sites: a retail store in Sacramento; an elementary school in San Marcos (near San Diego); and a four-building cold storage facility in Reedley (near Fresno). The latter included a cold storage building, a conditioning and fruit-palletizing area, a conditioned packing area, and two unconditioned packing areas. Results showed that installing a cool roof reduced the daily peak roof surface temperature of each building by 33-42 K. In the retail store building in Sacramento, for the monitored period of 8 August-30 September 2002, the estimated savings in average air conditioning energy use was about 72 Wh/m{sup 2}/day (52%). On hot days when the afternoon temperature exceeded 38 C, the measured savings in average peak demand for peak hours (noon-5 p.m.) was about 10 W/m{sup 2} of conditioned area. In the school building in San Marcos, for the monitored period of 8 July-20 August 2002, the estimated savings in average air conditioning energy use was about 42-48 Wh/m{sup 2}/day (17-18%). On hot days, when the afternoon temperature exceeded 32 C, the measured savings in average peak demand for hours 10 a.m.-4 p.m. was about 5 W/m{sup 2} of conditioned area. In the cold storage facility in Reedley, for the monitored period of 11 July-14 September 2002, and 11 July-18 August 2003, the estimated savings in average chiller energy use was about 57-81 Wh/m{sup 2}/day (3-4%). On hot days when the afternoon temperature exceeded 38 C, the measured savings in average peak-period demand (average cooling-power demand during peak demand hours, typically noon-6 p.m.) was about 5-6 W/m{sup 2} of conditioned area. Using the measured data and calibrated simulations, we estimated savings for similar buildings installing cool roofs in retrofit applications for all 16 California climate zones. For similar retail stores in climate zones 2 and 4-16, installing a cool roof can save about 6-15 kWh/m{sup 2}/year of conditioned area. In climate zones 2-16, estimates of average peak demand savings for hours noon-5 p.m. range from 2.9 to 5.8 W/m{sup 2}. For similar school buildings in climate zones 2-16, installing a cool roof can save from 3 to 6 kWh/m{sup 2}/year of conditioned roof area. For all 16 climate zones estimates of average peak demand savings for hours noon-5 p.m. range from 2.6 to 3.8 W/m{sup 2}. In similar cold storage buildings in all 16 climate zones, installing a cool roof can save about 4.5-7.4 kWh/m{sup 2}/year of conditioned roof area. In all 16 climate zones, estimates of average peak demand savings for hours noon-5 p.m. range from 3.9 to 6.6 W/m{sup 2}.

Akbari, Hashem; Levinson, Ronnen; Rainer, Leo

2004-07-14

464

PREFACE: XXXIII Symposium on Nuclear Physics  

NASA Astrophysics Data System (ADS)

The attached PDF gives a full listing of contributors and organisation members. In the present volume of Journal of Physics: Conference Series we publish the proceedings of the "XXXIII Symposium on Nuclear Physics", that was held from January 5-8, 2010 at the Hacienda Cocoyoc, Morelos, Mexico. The proceedings contain the plenary talks that were presented during the conference. The abstracts of all contributions, plenary talks and posters, were published in the Conference Handbook. The Symposium on Nuclear Physics has a long and distinguished history. From the beginning it was intended to be a relatively small meeting designed to bring together some of the leading nuclear scientists in the field. Its most distinctive feature is to provide a forum for specialists in different areas of nuclear physics, both theorists and experimentalists, students, postdocs and senior scientists, in a relaxed and informal environment providing them with a unique opportunity to exchange ideas. After the first meeting in Oaxtepec in 1978, the Symposium was organized every year without interruption which makes the present one the 33rd in a row. This year's meeting was dedicated to the memory of Marcos Moshinsky, who passed away on April 1, 2009. Dr. Moshinsky was the most distinguished pioneer and promoter of nuclear physics in Mexico and Latin America and holds the record of 31 (out of 32) participations at the Symposium. In the inaugural session, Alejandro Frank (ICN-UNAM), Peter Hess (ICN-UNAM) and Jorge Flores (IF-UNAM) spoke in his honor and recalled the virtues that characterized him as a teacher, scientist, founder of schools and academic institutions, colleague and friend. His generosity, excellence and honesty were emphasized as the personal qualities that characterized both his personal and academic life. moshinksky_photo "Marcos Moshinsky (1921-2009)" The scientific program consisted of 26 invited talks and 20 posters on a wide variety of hot topics in contemporary nuclear physics, ranging from the traditional fields of nuclear structure and reactions to radioactive beams, nuclear astrophysics, hadronic physics, fundamental symmetries, ultrarelativistic heavy ions, cosmic rays and quantum chaos. The high quality of the talks, the prestige of the speakers and the broad spectrum of subjects covered in the meeting, shows that nuclear physics is a very active area at the frontier of scientific research which establishes bridges between many different disciplines. One of the exciting new areas in nuclear physics is that of radioactive beams. It provides a powerful tool not only to study exotic nuclei close to the proton and neutron drip lines to obtain important information about the nature of the nucleon-nucleon interaction in stable and unstable nuclei, but also to address questions of fundamental importance in nuclear astrophysics as well as in various applications like mass spectroscopy, the production of radioactive isotopes and medical applications (Galindo-Uribarri). There was a presentation on the FRIB project which is currently under construction in the USA and its relevance for nuclear astrophysics and the limits of stability (Sherrill and Schatz) In the session on nuclear structure, there were several talks on the nucleon-nucleon interaction in nuclei close to the proton and neutron drip lines, like neutron-proton pairing in nuclei with an equal number of protons and neutrons (Pittel), and studies of stable and unstable neutron-rich nuclei near the closed shells N = 82 and N = 50 using (d, p) transfer reactions and Coulomb excitation by means of radioactive beams (Cizewski and Padilla-Rodal). There were several talks on the importance of reaction rates for the excitation of spin-isospin resonances (Sakai), massive star evolution (Klapp) and nuclear synthesis and stellar evolution (Rolfs). In another presentation, the importance of rare isotopes for astrophysical processes was highlighted (Schatz). In addition, there were discussions about the importance of the Pauli exclusion principle and phase transitions

Barrón-Palos, Libertad; Bijker, Roelof; Fossion, Ruben; Lizcano, David

2010-04-01

465

Crystalline oxides on semiconductors: a future for the nanotransistor  

NASA Astrophysics Data System (ADS)

This issue's Editor's Choice [1] is a brief review on promises and advantages of crystalline oxides on semiconductors, especially the role of interfaces, for semiconductor technology.The cover picture shows at the top a Z-contrast image of the Si:SrSi2:SrO interface, where on the left side the positions of the atoms are highlighted, and on the right side a theoretical simulation of the image is overlayed, using the theoretical equilibrium geometry of the interface as obtained from first principles (bottom, green: Si, blue: O, orange: Sr). Purple isosurfaces show the electron density of the Si-O bonding state, and the arrows give the direction of the microscopic dipoles at the interface.The first author Marco Buongiorno Nardelli is Professor at the Department of Physics of North Carolina State University, where he heads a research group focusing on the application of ab-initio electronic structure calculation techniques for the study of important aspects of the physics of materials (ERMES).This paper is a presentation from the 5th Motorola Workshop on Computational Materials and Electronics (MWCME 2003), held in Austin, Texas, 13-14 November 2003. The proceedings were guest-edited, for the fourth time in this journal, by Alex Demkov (now Freescale Semiconductor).This issue of physica status solidi (b) also contains Original Papers presented at the XI Latin American Congress of Surface Science and Its Applications (XI CLACSA), Pucón, Chile, 7-12 December 2003. The Proceedings of this conference are to be continued in phys. stat. sol. (a) 201, No. 10 (2004) and in an online issue of phys. stat. sol. (c) 1, No. S1 (2004).

Buongiorno Nardelli, M.; Walker, F. J.; McKee, R. A.

2004-08-01

466

Report Of The Cospar WG On "Future Of Space Astronomy"  

NASA Astrophysics Data System (ADS)

The COSPAR President on April 20, 2010 appointed the "Future of Space Astronomy” Working Group under the aegis of Commission E, with the aim to analyze the difficult situation of space astronomy over the next two decades and recommend ways to improve the prospects. Having assessed the scientific needs and the current plans of the main space agencies worldwide, the WG has identified some major concerns about the lack of a secured future for Space Astronomy. In fact, astronomers today have access to an impressive set of space missions and ground-based observatories that gives them nearly continuous coverage of the electromagnetic spectrum from the gamma-ray to the radio regions. But the picture becomes concerning and critical in the next 10 - 15 years, when current space astronomy missions will have ended and new missions will be much less numerous. Astronomy is a difficult observational science requiring continuous and simultaneous access to the full electromagnetic spectrum to explore our complex Universe and to pursue answers to fundamental scientific questions. The history of space astronomy, especially the past three decades, has demonstrated clearly the importance and benefits of access to the gamma-ray, X-ray, UV-optical, near IR and far-IR spectrum from space. So far the only planned observatory class missions, proposed to NASA-ESA-JAXA are JWST (2018), WFIRST/EUCLID (2018-2020), Athena (ex IXO, 2022) and LISA. The latter two under re-scope in an ESA alone scenario with a cost <1B€. We will present the main WG outcome with a number of recommendations and, finally, suggest a road map for the next decades. *WG membership: Pietro Ubertini (Chair), Italy, Neil Gehrels (Co-Chair), USA, Ian Corbett (IAU liason), UK, Paolo De Bernardis, Italy, Marcos Machado, Argentina, Matt Griffin, UK, Michael Hauser, USA, Ravinder K. Manchanda, India, Nobuyuki Kawai, Japan, Shuang-Nan Zhang, China, Mikhail Pavlinsky, Russia

Ubertini, Pietro; Space Astronomy*, Cospar WG on Future of

2011-09-01

467

Comparison of GLAS and Small-Footprint, Airborne Topographic Lidar Waveform Data From Non-homogeneous Landcover in Central Texas  

NASA Astrophysics Data System (ADS)

The Geoscience Laser Altimeter System (GLAS) on-board the Ice, Cloud and land Elevation Satellite (ICESat) is capable of producing range measurements with a precision of approximately 3 cm. While designed for mapping elevations of the ice sheets, data from GLAS have increasingly been used for vegetated terrestrial applications. Two ICESat ascending and descending passes were targeted over the Freeman Ranch, located near San Marcos, Texas on 14 March 2005 and 25 May 2005 to investigate the use of waveform lidar for determining vegetation structure. The Freeman Ranch is characterized by a mixture of rangeland and Oak-Juniper woodlands, and is the focus of many terrestrial studies focused on ecosystem carbon storage. The GLAS footprint during these acquisitions is approximately 35 m in diameter, which is a limitation for areas with non-homogeneous landcover such as the Freeman Ranch. To validate the potential of GLAS waveforms for determining vegetation structure, small-footprint airborne lidar data were collected by the Bureau of Economic Geology (BEG) on 12 August 2005 using an Optech ALTM 1225 system. The BEG ALTM system is equipped with a waveform digitizer that allows the simultaneous recording of conventional first and last return lidar data and the corresponding reflection waveforms at the 25 kHz laser pulse repetition rate. The small-footprint waveforms can be up-sampled to replicate the footprint of the GLAS system and scale differences between the two systems can be characterized and ultimately modeled. This project is intended to be a preliminary step towards developing a basis for relating airborne waveform lidar to spaceborne waveform lidar.

Gutierrez, R.; Neuenschwander, A. L.; Crawford, M. M.; Schutz, B. E.; Urban, T.; Liadsky, J.

2005-12-01

468

List of participants at SIDE IV meeting, Tokyo, 27 November--1 December 2000  

NASA Astrophysics Data System (ADS)

Mark J Ablowitz, Vsevolod Adler, Mark Alber, Said Belmehdi, Marco Boiti, Claude Brezinski, R Bullough, Y M Chiang, Theodore Chihara, Peter A Clarkson, Robert Conte, Adam Doliwa, Vladimir Dorodnitsyn, Mitsuaki Eguchi, Claire Gilson, Basil Grammaticos, Valeri Gromak, Rod Halburd, Koji Hasegawa, Jarmo Hietarinta, Ryogo Hirota, Xing Biao Hu, M Idzumi, J Inoguchi, Hiroya Ishikara, Mourad Ismail, Shin Isojima, Kenichi Ito, Yoshiaki Itoh, Masashi Iwasaki, Klara Janglajew, Michio Jimbo, Nalini Joshi, Kenji Kajiwara, Saburo Kakei, Masaru Kamata, Satoshi Kamei, Rinat Kashaev, Shingo Kawai, Taeko Kimijima, K Kimura, Anatol Kirillov, Koichi Kondo, Boris Konopelchenko, Martin Kruskal, Atsuo Kuniba, Wataru Kunishima, Franklin Lambert, Serguei Leble, Decio Levi, Shigeru Maeda, Manuel Manas, Ken-Ichi Maruno, Tetsu Masuda, J Matsukidaira, Atsushi Matsumiya, Shigeki Matsutani, Yukitaka Minesaki, Mikio Murata, Micheline Musette, Atsushi Nagai, Katsuya Nakagawa, Atsushi Nakamula, Akira Nakamura, Yoshimasa Nakamura, Frank Nijhoff, J J C Nimmo, Katsuhiro Nishinari, Michitomo Nishizawa, A Nobe, Masatoshi Noumi, Yaeko Ohsaki, Yasuhiro Ohta, Kazuo Okamoto, Alexandre Orlov, Naoki Osada, Flora Pempinelli, Spiro Pyrlis, Reinout Quispel, Orlando Ragnisco, Alfred Ramani, Jean-Pierre Ramis, Andreas Ruffing, Simon Ruijsenaars, Satoru Saito, Noriko Saitoh, Hidetaka Sakai, Paulo Santini, Narimasa Sasa, Ryu Sasaki, Yoshikatsu Sasaki, Junkichi Satsuma, Sergei Sergeev, Nobuhiko Shinzawa, Evgueni Sklyanin, Juris Suris, Norio Suzuki, Yukiko Tagami, Katsuaki Takahashi, Daisuke Takahashi, Tomoyuki Takenawa, Yoshiro Takeyama, K M Tamizhmani, T Tamizhmani, Kouichi Toda, Morikatsu Toda, Tetsuji Tokihiro, Takayuki Tsuchida, Yohei Tsuchiya, Teruhisa Tsuda, Satoru Tsujimoto, Walter Van Assche, Claude Viallet, Luc Vinet, Shinsuke Watanabe, Yoshihida Watanabe, Ralph Willox, Pavel Winternitz, Yasuhiko Yamada, Yuji Yamada, Jin Yoneda, Haruo Yoshida, Katsuhiko Yoshida, Daisuke Yoshihara, Fumitaka Yura, J Zagrodzinski, Alexei Zhedanov

2001-12-01

469

Effects of chronic electrical stimulation on paralyzed expiratory muscles.  

PubMed

Following spinal cord injury, the expiratory muscles develop significant disuse atrophy characterized by reductions in their weight, fiber cross-sectional area, and force-generating capacity. We determined the extent to which these physiological alterations can be prevented with electrical stimulation. Because a critical function of the expiratory muscles is cough generation, an important goal was the maintenance of maximal force production. In a cat model of spinal cord injury, short periods of high-frequency lower thoracic electrical spinal cord stimulation (SCS) at the T(10) level (50 Hz, 15 min, twice/day, 5 days/wk) were initiated 2 wk following spinalization and continued for a 6-mo period. Airway pressure (P)-generating capacity was determined by SCS. Five acute, spinalized animals served as controls. Compared with controls, initial P fell from 43.9 +/- 1.0 to 41.8 +/- 0.7 cmH(2)O (not significant) in the chronic animals. There were small reductions in the weight of the external oblique, internal oblique, transverses abdominis, internal intercostal, and rectus abdominis muscles (not significant for each). There were no significant changes in the population of fast muscle fibers. Because prior studies (Kowalski KE, Romaniuk JR, DiMarco AF. J Appl Physiol 102: 1422-1428, 2007) have demonstrated significant atrophy following spinalization in this model, these results indicate that expiratory muscle atrophy can be prevented by the application of short periods of daily high-frequency stimulation. Because the frequency of stimulation is similar to the expected pattern of clinical use for cough generation, the daily application of electrical stimulation could potentially serve the dual purpose of maintenance of expiratory muscle function and airway clearance. PMID:18403449

DiMarco, Anthony F; Kowalski, Krzysztof E

2008-04-10

470

Hepatitis B subvirus particles display both a fluid bilayer membrane and a strong resistance to freeze drying: a study by solid-state NMR, light scattering, and cryo-electron microscopy/tomography.  

PubMed

Hepatitis B surface antigen (HBsAg) subvirus particles produced from yeast share immunological determinants with mature viruses, which enable the use of HBsAg as a potent antigen for human vaccination. Because the intimate structure of such pseudoviral particles is still a matter of debate, we investigated the robustness of the external barrier and its structure and dynamics using the noninvasive solid-state NMR technique. This barrier is made of 60% proteins and 40% lipids. Phospholipids represent 83% of all lipids, and chain unsaturation is of 72%. Dynamics was reported by embedding small amounts of deuterium chain-labeled unsaturated phospholipid into the external barrier of entire subviral particles, while controlling particle integrity by cryoelectron microscopy, tomography, and light scattering. Variable preparation modes were used, from mild incubation of small unilamellar vesicles to very stringent incorporation with freeze-drying. A lipid bilayer structure of 4- to 5-nm thickness was evidenced with a higher rigidity than that of synthetic phospholipid vesicles, but nonetheless reflecting a fluid membrane (50-52% of maximum rigidity) in agreement with the elevated unsaturation content. The HBsAg particles of 20- to 24-nm diameter were surprisingly found resistant to lyophilization, in such a way that trapped water inside particles could not be removed. These dual properties bring more insight into the mode of action of native subviral particles and their recombinant counterparts used in vaccines.-Grélard, A., Guichard, P., Bonnafous, P., Marco, S., Lambert, O., Manin, C., Ronzon, F., and Dufourc, E. J. Hepatitis B subvirus particles display both a fluid bilayer membrane and a strong resistance to freeze drying: a study by solid-state NMR, light scattering, and cryo-electron microscopy/tomography. PMID:23839934

Grélard, Axelle; Guichard, Paul; Bonnafous, Pierre; Marco, Sergio; Lambert, Olivier; Manin, Catherine; Ronzon, Frédéric; Dufourc, Erick J

2013-07-09

471

Targeted Deletion of Nrf2 Impairs Lung Development and Oxidant Injury in Neonatal Mice  

PubMed Central

Abstract Aims: Nrf2 is an essential transcription factor for protection against oxidant disorders. However, its role in organ development and neonatal disease has received little attention. Therapeutically administered oxygen has been considered to contribute to bronchopulmonary dysplasia (BPD) in prematurity. The current study was performed to determine Nrf2-mediated molecular events during saccular-to-alveolar lung maturation, and the role of Nrf2 in the pathogenesis of hyperoxic lung injury using newborn Nrf2-deficient (Nrf2?/?) and wild-type (Nrf2+/+) mice. Results: Pulmonary basal expression of cell cycle, redox balance, and lipid/carbohydrate metabolism genes was lower while lymphocyte immunity genes were more highly expressed in Nrf2?/? neonates than in Nrf2+/+ neonates. Hyperoxia-induced phenotypes, including mortality, arrest of saccular-to-alveolar transition, and lung edema, and inflammation accompanying DNA damage and tissue oxidation were significantly more severe in Nrf2?/? neonates than in Nrf2+/+ neonates. During lung injury pathogenesis, Nrf2 orchestrated expression of lung genes involved in organ injury and morphology, cellular growth/proliferation, vasculature development, immune response, and cell–cell interaction. Bioinformatic identification of Nrf2 binding motifs and augmented hyperoxia-induced inflammation in genetically deficient neonates supported Gpx2 and Marco as Nrf2 effectors. Innovation: This investigation used lung transcriptomics and gene targeted mice to identify novel molecular events during saccular-to-alveolar stage transition and to elucidate Nrf2 downstream mechanisms in protection from hyperoxia-induced injury in neonate mouse lungs. Conclusion: Nrf2 deficiency augmented lung injury and arrest of alveolarization caused by hyperoxia during the newborn period. Results suggest a therapeutic potential of specific Nrf2 activators for oxidative stress-associated neonatal disorders including BPD. Antioxid. Redox Signal. 00, 000–000.

van Houten, Bennett; Wang, Xuting; Miller-DeGraff, Laura; Fostel, Jennifer; Gladwell, Wesley; Perrow, Ligon; Panduri, Vijayalakshmi; Kobzik, Lester; Yamamoto, Masayuki; Bell, Douglas A.; Kleeberger, Steven R.

2012-01-01

472

Effect of Lactobacillus brevis KB290 on the cell-mediated cytotoxic activity of mouse splenocytes: a DNA microarray analysis.  

PubMed

Lactic acid bacteria confer a variety of health benefits. Here, we investigate the mechanisms by which Lactobacillus brevis KB290 (KB290) enhances cell-mediated cytotoxic activity. Female BALB/c mice aged 9 weeks were fed a diet containing KB290 (3 × 109 colony-forming units/g) or starch for 1 d. The resulting cytotoxic activity of splenocytes against YAC-1 cells was measured using flow cytometry and analysed for gene expression using DNA microarray technology. KB290 enhanced the cell-mediated cytotoxic activity of splenocytes. DNA microarray analysis identified 327 up-regulated and 347 down-regulated genes that characterised the KB290 diet group. The up-regulated genes were significantly enriched in Gene Ontology terms related to immunity, and, especially, a positive regulation of T-cell-mediated cytotoxicity existed among these terms. Almost all the genes included in the term encoded major histocompatibility complex (MHC) class I molecules involved in the presentation of antigen to CD8+ cytotoxic T cells. Marco and Signr1 specific to marginal zone macrophages (MZM), antigen-presenting cells, were also up-regulated. Flow cytometric analysis confirmed that the proportion of MZM was significantly increased by KB290 ingestion. Additionally, the over-represented Kyoto Encyclopedia of Genes and Genomes pathways among the up-regulated genes were those for natural killer (NK) cell-mediated cytotoxicity and antigen processing and presentation. The results for the selected genes associated with NK cells and CD8+ cytotoxic T cells were confirmed by quantitative RT-PCR. These results suggest that enhanced cytotoxic activity could be caused by the activation of NK cells and/or of CD8+ cytotoxic T cells stimulated via MHC class I presentation. PMID:23544404

Fukui, Yuichiro; Sasaki, Erika; Fuke, Nobuo; Nakai, Yuji; Ishijima, Tomoko; Abe, Keiko; Yajima, Nobuhiro

2013-04-01

473

Suction catheter size: an assessment and comparison of three different calculation methods.  

PubMed

BACKGROUND:: Current AARC clinical practice guidelines (CPGs) recommend a suction catheter to endotracheal tube (SC:ETT) ratio based on a comparison between the external diameter of the suction catheter and the internal diameter (ID) of the ETT. A SC:ETT ratio of less than 50% is consistent with the current recommendation. We theorized that a more satisfactory assessment of SC:ETT ratio could be accomplished using volume or area formulas and expansion of diameter recommendations. Some respiratory care texts recommend a SC:ETT ratio that exceeds the CPG standard. METHODS:: This research project was granted exemption status by the institutional review board at Texas State University-San Marcos. The project involved calculating the internal volume and area of a variety of ETT sizes, calculating the external volume and area of a variety of SC sizes and comparing the ETT and SC calculations to achieve a final ratio. In addition, we assessed negative pressures using vacuum suction and a lung model during multiple suction maneuvers. RESULTS:: Our results indicate volume and area calculations provide an alternative method to determining SC:ETT ratio. We found that a volume or area ratio of 50% corresponds to a diameter ratio of 70%. We demonstrated that negative pressures during suctioning remain low at the new ratios. This indicates that use of a larger suction catheter than current clinical practice guidelines is possible while continuing to allow air entrainment between the suction catheter and endotracheal tube. CONCLUSION:: Our investigation determined the ETT internal volume and area, SC external volume and area and SC:ETT ratios based on volume, area and diameter for a variety of ETTs and SCs. Our results support an alternative ratio when pairing suction catheters and endotracheal tubes. PMID:23777657

Russian, Chris; Gonzales, Joshua F; Henry, Nicholas R

2013-06-18

474

Geographic distribution and clinical description of leishmaniasis cases in Peru.  

PubMed

Studies were conducted from 1986 through 1993 to further define the geographic distribution and relative importance of different species of Leishmania as a cause of leishmaniasis in Peru. Patients with a clinical diagnosis of cutaneous and/or mucosal or diffuse cutaneous leishmaniasis were enrolled at the Naval Medical Research Institute Detachment (NAMRID) Laboratory in Lima, the Tropical Disease Clinic at San Marcos University Daniel A. Carrión, the Central Military Hospital, and a Ministry of Health hospital in Cusco, Peru. Clinical features, lesion aspirates, and biopsy tissue were obtained from each patient. All specimens were collected and assayed separately, including multiple specimens from some of the same patients for Leishmania parasites by inoculating aliquots of either aspirates or biopsy tissue suspensions onto Senekji's blood agar medium. Stocks of Leishmania isolates were used to prepare promastigotes to produce extracts for identifying the Leishmania species by the cellulose acetate electrophoresis enzyme technique. A total of 351 isolates of Leishmania were obtained from 350 patients who were infected primarily in the low and high jungle of at least 15 different Departments of Peru. Of the 351 isolates, 79% were identified as L. (V.) braziliensis, 7% as L. (V.) guyanensis, 10% as L. (V.) peruviana, 2% as L. (V.) lainsoni, and 1.7% as L. (L.) amazonensis. The clinical form of disease varied depending on the species of Leishmania, with L. (V.) braziliensis being associated most frequently with cutaneous, mucosal ulcers and mixed cutaneous and mucosal disease, and L. (V) peruviana, L. (V.) guyanensis, L. (V.) lainsoni with cutaneous lesions. Leishmania (L.) amazonensis was isolated from six patients, three with cutaneous lesions, one with mucosal lesions, and two with diffuse cutaneous lesions. Among all of the leishmaniasis cases, males were affected more frequently, and cases occurred among patients less than 10 to more than 51 years of age. These data further defined the geographic distribution and the relative frequency of Leishmania species associated with different clinical forms of leishmaniasis in Peru. PMID:9715953

Lucas, C M; Franke, E D; Cachay, M I; Tejada, A; Cruz, M E; Kreutzer, R D; Barker, D C; McCann, S H; Watts, D M

1998-08-01

475

Expression of GIV/Girdin, a metastasis-related protein, predicts patient survival in colon cancer  

PubMed Central

Metastasis accounts for the majority of cancer-related deaths. Accurate prediction of metastatic potential of tumors has been elusive, and the search for clinically useful markers continues. We previously reported that GIV/Girdin triggers tumor cell migration by virtue of a C-terminal guanine-nucleotide exchange factor motif that activates G?i. Here we identify GIV as a metastasis-related protein whose full-length transcript (GIV-fl) is expressed exclusively in highly invasive colon, breast, and pancreatic carcinoma cells and not in their poorly invasive counterparts. A prospective, exploratory biomarker study conducted on a cohort of 56 patients with stage II colorectal cancer revealed a significant correlation between GIV-fl expression in tumor epithelium and shortened metastasis-free survival. Survival rate for patients with GIV-fl-positive tumors is significantly reduced compared with the patients with GIV-fl-negative tumors [P<0.0001; hazard ratio=0.076; CI=0.052–0.30 (95%)]. At the 5-yr mark, survival is 100% in the GIV-fl-negative group and 62 ± 9% (mean±se; P=6×10?5) in the GIV-fl-positive group. Furthermore, GIV-fl expression predicts a risk of mortality independent of the microsatellite stability status, a well-established prognosticator of colorectal cancers. We conclude that GIV-fl is a novel metastasis-related protein and an independent adverse prognosticator that may serve as a useful adjunct to traditional staging strategies in colorectal carcinoma.—Garcia-Marcos, M., Jung, B. H., Ear, J., Cabrera, B., Carethers, J. M., Ghosh, P. Expression of GIV/Girdin, a metastasis-related protein, predicts patient survival in colon cancer.

Garcia-Marcos, Mikel; Jun