Sample records for sucre venezuela geographic

  1. [Mollusc diversity in an Arca zebra (Mollusca: Bivalvia) community, Chacopata, Sucre, Venezuela].

    PubMed

    Prieto, A S; Ruiz, L J; García, N; Alvarez, M

    2001-06-01

    The diversity of a subtidal epifaunal mollusk community was studied from September, 1990 to September, 1991 in Chacopata, Sucre State, Venezuela. There were 40 species (24 bivalves and 16 gastropods). The diversity indexes (H' = 2.087, J' = 0.392, 1/D = 0.528) were low when compared with other tropical zones. Monthly diversity reached its maximum in September, 1990 (1.63 bits/ind.) and July, 1991 (1.60 bits/ind.); minimum diversity occurred in June, 1991 (0.52 bits/ind.). A Log series model applied to species abundance data showed a straight line with a diversity index alpha of 5.56. Of 40 species identified, the turkeywing Arca zebra was dominant (69% in number of individuals and 72% of biomass) followed by Pinctada imbricata, Modiolus squamosus, Chama macerophyla and Anadara notabilis. The predatory snails Phyllonotus pomum, Chicoreus brevifrons and Murex recurvirostris seemed to have trophic relationships with A. zebra. The total mean biomass in wet weight (469.20 +/- 263 g m-2, shell included) was high which indicates that A. zebra, a species with a rapid growth rate, occupies a central role in the assemblage as an efficient filter feeder that converts planktonic food into available biomass, supporting one of the most important fisheries in Venezuela. PMID:11935909

  2. [Larval seasonality of the mosquito Anopheles aquasalis (Diptera: Culicidae) and other insects associated to its habitat in Sucre, Venezuela].

    PubMed

    Berti, Jesús; González, Julio; Navarro-Bueno, Edith; Zoppi, Evelin; Gordon, Elizabeth; Delgado, Laura

    2010-06-01

    Anopheles aquasalis Curry is considered the main vector of human malaria in Northern Venezuela. A longitudinal study was carried out in the coastal areas of the Paria Peninsula, Sucre state. The larval habitats of A. aquasalis were classified as: 1--Brackish mangrove, and 2--Freshwater herbaceous swamp. Field surveys of mosquito larvae and aquatic insects were carried out in the same breeding sites over a one-year period, between January and December 1999. At each site, 30 samples of Anopheles larvae and aquatic insects were taken monthly. Simultaneously with mosquito larvae sampling, five selected variables of water were measured: conductivity, salinity, dissolved oxygen, temperature and pH. Seasonal and temporal variations of A. aquasalis larvae and aquatic insects were determined in the two larval habitats. For the entire study period, the abundance of larvae was higher in the mangrove. Correspondence analysis showed a strong relation between some chemical factors of water and larval abundance. The abundance of A. aquasalis larvae in both seasons, was positively correlated with water salinity, pH and conductivity, and negatively and with dissolved oxygen in the dry season. The presence of larvae was positively correlated with the presence of Avicenia germinans. In the mangrove there was a positive association between larvae abundance and Scirtidae family abundance and a negative correlation between larvae abundance and monthly precipitation (Spearman), as well as a significant negative correlation between Gerridae abundance and monthly precipitation. In the herbaceous swamp, there were not significant associations between A. aquasalis larvae abundance and abundance of others aquatic insects associated to habitat. PMID:20527475

  3. Venezuela.

    PubMed

    1987-04-01

    The background notes by the U.S. State Department on Venezuela emphasize the unique economic conditions in this oil-rich nation, and include information on its people, geography, history, government politics, defense and foreign relations. Venezuela, located on the north coast of South America, has 17,791,000 people, growing at a rate of 2.7%. Infant mortality is 2.7/1000, and life expectancy is 70 years. Geography ranges from the scarcely populated highlands between the Orinoco river and Guyana, the Orinoco plains, to the populated Andes mountains and coast. 80% of the population is urban. Literacy is a priority at 88.4%; Technical and university education is increasing; emigration from other countries is common because of relatively good working conditions. Venezuela has a long history of self government, having become independent in 1921. Now the democratic constitutional government is effective in improving both internal and regional development and human rights. The economy is based on oil production and refining, as well as steel and aluminum, all nationalized industries. Self-sufficiency in agriculture is a national goal. Because of the rapid population growth rate, however, per capita income and GNP are stagnating. PMID:12177927

  4. Venezuela.

    PubMed

    1982-02-01

    This discussion of Venezuela reviews the following: the history of the country's demographic situation; the government's overall approach to population problems; statistical systems and development planning; institutional arrangements for the integration of population within development planning; the government's view of the importance of population policy in realizing development objectives; population size, growth, and natural increase; morbidity and mortality; fertility; international migration; and spatial distribution. Over the 1920-1961 period Venezuela's level of fertility was high and continued to rise gradually. The crude birth rate was around 40.0/1000 population in 1920, 44.0/1000 in 1950, and 45.0/1000 in 1961, and thereafter began to decline, dropping to a level of 38.4/1000 by 1971. During the same period, mortality underwent a steady decline, with the crude death rate falling from 30.0/1000 population in 1920 to 13.7 in 1950, 7.4 in 1961, and to 6.6 by 1971. Venezuela's government has no policy of intervention to modify fertility or population growth but has relied primarily on the benefits of rapid economic growth to achieve a rate of demographic growth that is compatible with its development objectives. Since 1920, 7 modern censuses have been conducted. The most recent census was in 1971. The registration data are classified as incomplete. Multiround sample household surveys were conducted in 1976-1977 and 1978. The government has not established a special unit for population policies. It assigned this function to the Central Planning Agency in 1975. The government has not announced a comprehensive population policy, but it has been moving in the direction of formulating more comprehensive policies in 2 areas of concern--international migration and spatial distribution. The government considers the current rate of population growth to be satisfactory despite the fact that it is rather high by Latin American standards. The government also considers levels and trends of mortality to be acceptable, given current economic and social circumstances. The government currently considers levels and trends of immigration to be significant and unsatisfactory because they are too high. The country is now more than 75% urban. The government considers the distribution of population within the national territory to be inappropriate and to require substantial modification. PMID:12279318

  5. Geospatial tools for the identification of a malaria corridor in Estado Sucre, a Venezuelan north-eastern state.

    PubMed

    Delgado-Petrocelli, Laura; Camardiel, Alberto; Aguilar, Víctor Hugo; Martinez, Néstor; Córdova, Karenia; Ramos, Santiago

    2011-05-01

    Landscape ecology research relies on frameworks based on geographical information systems (GIS), geostatistics and spatial-feature relationships. With regard to health, the approach consists of systems analysis using a set of powerful tools aimed at the reduction of community vulnerability through improved public policies. The north-oriental malaria focus, one of five such foci in Venezuela, situated in the north-eastern part of the Estado Sucre state, unites several social and environmental features and functions as an epidemiological corridor, i.e. an endemic zone characterised by permanent interaction between the mosquito vector and the human host allowing a continuous persistence of the malaria lifecycle. A GIS was developed based on official cartography with thematic overlays depicting malaria distribution, socio-economic conditions, basic environmental information and specific features associated with the natural wetlands present in the area. Generally, malaria foci are continuously active but when the malaria situation was modelled in the north-oriental focus, a differential, spatio-temporal distribution pattern situation was found, i.e. a situation oscillating between very active and dormant transmission. This pattern was displayed by spatial and statistical analysis based on the model generated in this study and the results were confirmed by municipal and county malaria records. Control of malaria, keeping the incidence at a permanently low level within the regional population, should be possible if these results are taken into account when designing and implementing epidemiological surveillance policies. PMID:21590666

  6. A new species of Microphallus (Trematoda: Microphallidae) from Venezuela

    Microsoft Academic Search

    M. T. Díaz; A. K. Bashirullah; L. E. Hernández

    During 1997-1999, a total of 94 crabs, Uca rapax were collected from La Sabana, La Ceiba and El Paujil, Sucre State, Venezuela. Of these 36 were infected with metacercariae. Two parasites were located in the abdominal muscles and one under the tissue of carapace and gonad. These metacercariae grew to adults in the following genera: Levinseniella, Microphallus and Maritrema, in

  7. Microbial activity in surface sediments of Chacopata-Bocaripo lagoon axis, Sucre State, Venezuela.

    PubMed

    Segnini de B, Mary Isabel; Gómez, Irma; Brito, Leonor; Acosta, Vanessa; Troccoli, Luis

    2015-02-28

    The aim of this work was to evaluate the microbial activity of the surface sediments (0-10 cm) of the Chacopata-Bocaripo lagoon axis (Ch-BLA) through microbiological parameters: microbial biomass (Cmic) dehydrogenase activity (DHS), fluorescein diacetate hydrolysis (HFDA), arginine ammonification (AA) and biochemical parameters: phosphatase (PHa) and urease (URa) activity. They were determined during transition (July 2010) and upwelling (March 2011) periods. Total organic carbon (TOC) did not vary significantly (p?0.05) between climatic periods. All the parameters studied were higher in upwelling season: Cmic (191.79 mg Cmic kg(-1)), DHS (228.70 ?g TFF g(-1) 24 h(-1)), HFDA (204.09 ?g fluorescein g(-1) 24 h(-1)), AA (13.09 ?g NH4-N g(-1) h(-1)), PHa (132.31 ?g pNF g(-1) h(-1)), URa (12.90 ?g NH4-N g(-1) h(-1)). They appear to be controlled by the availability and quality of nutrients in each climatic period, and were useful tools for evaluating changes in microbial activity in marine sediments. PMID:25455789

  8. A new species of Microphallus (Trematoda: Microphallidae) from Venezuela.

    PubMed

    Díaz, M T; Bashirullah, A K; Hernández, L E

    2004-06-01

    During 1997-1999, a total of 94 crabs, Uca rapax were collected from La Sabana, La Ceiba and El Paujil, Sucre State, Venezuela. Of these 36 were infected with metacercariae. Two parasites were located in the abdominal muscles and one under the tissue of carapace and gonad. These metacercariae grew to adults in the following genera: Levinseniella, Microphallus and Maritrema, in the period of 2-5 days after feeding experimentally to the rat Rattus norvegicus, mice Mus musculus and duck Cairinia moschata. Specimens of the genus Microphallus were described herein as a new species M. sabanensis. The life cycle of M. sabanensis sp.nov. were studied experimentally using rat, mice and duck. All developmental stages and the adult are described. In addition, M. sabanensis was collected from wild birds Anas discors, Pluvialis squatarola, Butorides striatus, Egretta caerulea and Nycticorax violaceus from the same localities. PMID:17354386

  9. Venezuela loses its forests

    Microsoft Academic Search

    Julio César Centeno

    2001-01-01

    Venezuela has one of the highest deforestation rates in Latin America. Most is due to the conversion of forests into cropland and pastures. Venezuela is also among the eight richest countries in the world in biodiversity (W.C.M.C. et al 1992). As forests disappear, the country loses one of the main supports for effective models of sustainable development.

  10. Reverse smokers's and changes in oral mucosa. Department of Sucre, Colombia

    Microsoft Academic Search

    Gloria J. Alvarez Gómez; Efraín Alvarez Martínez; Raúl Jiménez Gómez; Yolanda Mosquera Silva; Angela María; Gaviria Núñez; Adriana Garcés Agudelo; Alexander Alonso Duque; Alexander Zabala Castaño; Elizabeth Echeverri González; Melissa Isaac Millán; Diana Ramírez Ossa

    Objectives: This work is intended to establish the prevalence of reverse smokers at the villages of Hato Nuevo, San Francisco and Cayo de Palma, Department of Sucre, Colombia, characterizing their socio-culture conditions, clinical and histological changes in the oral mucosa. Design of study: A descriptive study was done through a home to home inquiry to select the people with inclusion

  11. Geographical Names

    NSDL National Science Digital Library

    2002-01-01

    Maintained by the Secretariat of the Geographical Names Board of Canada, the Geographical Names Web site helps make sense of the more than 350,000 official and formerly official geographical names in Canada. Visitors can search names, explore origins of names, research name changes, and much more.

  12. Astronomy in Venezuela

    NASA Astrophysics Data System (ADS)

    Rosenzweig, Patricia

    Since the installation of the Observatorio Cagigal in Caracas, astronomy in Venezuela has developed steadily, and, in the last few decades, has been strong. Both theoretical and observational astronomy now flourish in Venezuela. A research group, Grupo de Astrofísica (GA) at the Universidad de Los Andes (ULA) in Mérida, started with few members but now has increased its numbers and undergone many transformations, promoting the creation of the Grupo de Astrofísica Teórica (CAT), and with other collaborators initiated the creation of a graduate study program (that offers master's and doctor's degrees) in the Postgrado de Física Fundamental of ULA. With the financial support of domestic Science Foundations such as CONICIT, CDCHT, Fundacite, and individual and collective grants, many research projects have been started and many others are planned. Venezuelan astronomy has benefitted from the interest of researchers in other countries, who have helped to improve our scientific output and instrumentation. With the important collaboration of national and foreign institutions, astronomy is becoming one of the strongest disciplines of the next decade in Venezuela.

  13. Geographical DNA

    NASA Astrophysics Data System (ADS)

    Wojtanowicz, Pawe?

    2012-01-01

    The article shows the results of a study undertaken to search for a model illustrating the development of geographical thought. The created model, formulated with a triad that defines geography: human being-space-time, displays levels merging geographical sciences. These joining elements created by geographers, more or less consciously cooperating with the representatives of other sciences, seem to be the essence of the unity of the continuously spreading study range of geography.

  14. THE PEARL FISHERY OF VENEZUELA

    E-print Network

    THE PEARL FISHERY OF VENEZUELA Marine Biological Lafi'ir-toiy X.I B K. A. R TT JUN 2 41950 WOODS Albert M. Day, Director Special Scientific Report - Fisheries Ho. 26 THE PEARL FISHERY OF VENEZUELA Paul S. Galtsoff Fishery Research Biologist COMTEHTS Page Introduction 2 Brief history of the pearl

  15. Enzootic transmission of yellow fever virus, Venezuela.

    PubMed

    Auguste, Albert J; Lemey, Philippe; Bergren, Nicholas A; Giambalvo, Dileyvic; Moncada, Maria; Morón, Dulce; Hernandez, Rosa; Navarro, Juan-Carlos; Weaver, Scott C

    2015-01-01

    Phylogenetic analysis of yellow fever virus (YFV) strains isolated from Venezuela strongly supports YFV maintenance in situ in Venezuela, with evidence of regionally independent evolution within the country. However, there is considerable YFV movement from Brazil to Venezuela and between Trinidad and Venezuela. PMID:25531105

  16. Population genetic structure of the dengue mosquito Aedes aegypti in Venezuela

    Microsoft Academic Search

    Flor Herrera; Ludmel Urdaneta; José Rivero; Normig Zoghbi; Johanny Ruiz; Gabriela Carrasquel; José Antonio Martínez; Martha Pernalete; Patricia Villegas; Ana Montoya; Yasmin Rubio-Palis; Elina Rojas

    2006-01-01

    The mosquito Aedes aegypti is the main vector of dengue in Venezuela. The genetic structure of this vector was investigated in 24 samples collected from eight geographic regions separated by up to 1160 km. We examined the distribution of a 359-basepair region of the NADH dehydrogenase subunit 4 mitochondrial gene among 1144 Ae. aegypti from eight collections. This gene was

  17. Geographic Names

    USGS Publications Warehouse

    Yost, Lou; Carswell, William J., Jr.

    2009-01-01

    The Geographic Names Information System (GNIS), developed by the U.S. Geological Survey (USGS) in cooperation with the U.S. Board on Geographic Names (BGN), contains information about the official names for places, features, and areas in the 50 States, the District of Columbia, the territories and outlying areas of the United States, including Antarctica. It is the geographic names component of The National Map. The BGN maintains working relationships with State names authorities to cooperate in achieving the standardization of geographic names. The GNIS contains records on more than 2 million geographic names in the United States - from populated places, schools, reservoirs, and parks to streams, valleys, springs, ridges, and every feature type except roads and highways. Entries include information such as the federally-recognized name and variant names and spellings for the feature; former names; the status of the name as determined by the BGN; county or counties in which each named feature is located; geographic coordinates that locate the approximate center of an aerial feature or the mouth and source of a linear feature, such as a stream; name of the cell of the USGS topographic map or maps on which the feature may appear; elevation figures derived from the National Elevation Dataset; bibliographic code for the source of the name; BGN decision dates and historical information are available for some features. Data from the GNIS are used for emergency preparedness, mapmaking, local and regional planning, service delivery routing, marketing, site selection, environmental analysis, genealogical research, and other applications.

  18. Integrating Geographical

    E-print Network

    11 Integrating Geographical Information Systems and Grid Services for Earthquake Forecasting Marlon Earthquake Forecast WS Science Grid EPR/CIP Grid ... Tsunami EPR/CIP ... Data Access/Storage Security built as a Grid of Web Service (WS) Grids Earthquake Response WS Physical Network Registry Metadata

  19. [Yellow fever in Venezuela].

    PubMed

    Valero, Nereida

    2003-12-01

    In Venezuela the yellow fever has been presented in three wild focuses: San Camilo in the Tachira State, South of the Lake in the Zulia and Guayana. The last human case registered of urban yellow fever happened in 1918 in the city of Coro, Falcon State. Nevertheless, according to the epidemic registration of the Ministry of Health and Social Development corresponding to the epidemiological week no. 38 of the year 2003, 318 cases of wild yellow fever had been investigated (173 of the Zulia and 145 of Tachira), of which were confirmed 31, with a mortality of 58.0%. Previous to the appearance of this outbreak, it was notified an epizooty in monkeys with high mortality in November of 2002 in the Jesus Maria Semprum municipality of the Zulia State, persisting until September of 2003, extended to the Tachira State. Possible reasons of the reemergency of this illness are analyzed based on the high mobilization of displaced population, remote areas and of difficult access, high concentration of indigenous population (Bari, Yuepa, Wayúu) and border conflict. PMID:14727380

  20. Zonation of hydric regimens in Venezuela based on rainfall characteristics

    NASA Astrophysics Data System (ADS)

    Lobo, D.; Verbist, K.; Gabriels, D.; Puche, M.; Bracho, G.; Soto, G.; Santibañez, F.

    2012-04-01

    The climate in Venezuela is a product of a complex combination and interaction of meteorological and geographical factors such as the geographic location either north of Ecuador or in the tropics, and the presence of warm waters north and northeast, a vast tropical moist forest south and a mountain range west. In order to delimit the different climatic zones in Venezuela, a zoning of water regimes were used to classify climate indices primarily on rainfall parameters. A first index used was the length of a dry period, corresponding to the number of months in the year when precipitation is less than half of the reference evapotranspiration. Another index was the Aridity Index (Ia) proposed by UNEP (1997), for which calculations were based on values of average annual rainfall of the stations of the FAO database (1984, 2000). The reference evapotranspiration (ETo) was calculated by the CIRH program version 2.0 (Santibanez, 2005), which allows the calculation of ETo by the FAO (Allen et al.1998) or by the original Penman-Monteith formula, by Thornthwaite (1948), Turc (1961) or by Ivanov (1996). The results show that the distribution of the climatic regimes of Venezuela is determined by rainfall patterns. The central region is dominated by a sub-humid regime surrounded by a humid regime. The southern region is dominated by hyper-humid, hydric and hyper-hydric regimes, as well as the most western and eastern regions. In the northern and central-western regions the semiarid, arid and hyper-arid regimes dominate.

  1. Venezuela: World Oil Report 1991

    SciTech Connect

    Not Available

    1991-08-01

    This paper reports on Venezuela's expansion by state oil company PDVSA has gone from a mere concept a year ago to a well-defined plan. The five-year project that began this year and runs through 1995 received a $4-billion upgrading last fall to $25 billion. Money will be spent in increments of $5 billion/year, and all sectors are involved. Largest share, about $10.5 billion, will go to upstream projects, with $6 billion to be invested in refining, $6 billion in petrochemicals, $1.5 billion in coal and $800 million in domestic marketing. PDVSA intends to finance most of the spending directly from its cash flow. The upstream spending will go toward boosting oil production to more than 3.6 MMbpd by the beginning of 1996, with capacity topping at 4.2 MMbopd. Such heavy spending should prove a boon to the Venezuelan economy. The oil industry constitutes 23% of Venezuela's GNP, accounts for 75% of governmental revenues and produces 70% of the nation's annual foreign exchange earnings. The Ministry of Planning already is forecasting a 7% leap in real growth of the GNP this year.

  2. An Example of Educational Transformation: Venezuela.

    ERIC Educational Resources Information Center

    Cirigliano, Gustavo F. J.

    1979-01-01

    Presents a case study of educational development in Venezuela, with emphasis on political and cultural influences, social needs, needs of developing nations, experimentation on all levels, fellowship programs, and projections for the future. (DB)

  3. Infrageneric phylogeny of Schoenocaulon (Liliales: Melanthiaceae) with clarification of cryptic species based on ITS sequence data and geographical distribution

    Microsoft Academic Search

    WENDY B. ZOMLEFER; W. MARK WHITTEN; NORRIS H. WILLIAMS; WALTER S. JUDD

    2006-01-01

    As currently defined, the 24 species of Schoenocaulon occur in three disjunct areas: north central Florida (one species, S. dubium), southern Peru (portion of the range of S. officinale), and the region from southeastern New Mexico-Texas south to Venezuela; the 20 species endemic to Mexico are geographically restricted. Species delimitations, often based on tepal morphology, have been problematic. Our analyses

  4. Existentialism in Geographic Education

    ERIC Educational Resources Information Center

    Lee, David R.

    1974-01-01

    An existential approach to geographic education refers to the individual's ability to conceive of and experience geographic phenomena; implies a responsibility toward, as well as appreciation of, spatially defined phenomena; and leads to aesthetic and advocacy geography. (JH)

  5. Geographic Media Literacy

    ERIC Educational Resources Information Center

    Lukinbeal, Chris

    2014-01-01

    While the use of media permeates geographic research and pedagogic practice, the underlying literacies that link geography and media remain uncharted. This article argues that geographic media literacy incorporates visual literacy, information technology literacy, information literacy, and media literacy. Geographic media literacy is the ability…

  6. Classifying Geographical History

    Microsoft Academic Search

    Alan R. H. Baker

    2007-01-01

    Although the term “historical geography” has been the subject of a sustained and critical debate, that of “geographical history” has not. Usage of the latter term has been variable and the epistemological status of geographical history has been ambiguous. An examination of the usage of the term “geographical history” during the past 100 years or so reveals both that it

  7. Microfilaria bolivarensis: a new species of filaria from man in Venezuela.

    PubMed

    Godoy, G A; Orihel, T C; Volcan, G S

    1980-07-01

    An unsheathed microfilaria, unlike any other already described from man, was found in thick blood smears and Knott samples taken from Amerinds living along the upper Caura River in Bolivar State, Venezuela. The mirofilaria, which measures 256 x 7-8 micrometers in thick blood smears and 300 x 8 micrometers in Knott samples, is easily differentiated morphologically from Mansonella ozzardi with which it often occurs concomitantly. It is readily differentiated, on morphological criteria, from all other species of filariae which infect man, as well. The parasite has been named Microfilaria bolivarensis after the geographical locality in which it was discovered. PMID:7406105

  8. Evaluation in Geographic Education.

    ERIC Educational Resources Information Center

    Kurfman, Dana G., Ed.

    This second yearbook of the National Council for Geographic Education presents recent thinking about the formulation and assessment of the educational outcomes of geography. Dana G. Kurfman overviews "Evaluation Developments Useful in Geographic Education" relating evaluation to decision making, objectives, data gatherings, and data…

  9. Environmental geographic information system.

    SciTech Connect

    Peek, Dennis; Helfrich, Donald Alan; Gorman, Susan

    2010-08-01

    This document describes how the Environmental Geographic Information System (EGIS) was used, along with externally received data, to create maps for the Site-Wide Environmental Impact Statement (SWEIS) Source Document project. Data quality among the various classes of geographic information system (GIS) data is addressed. A complete listing of map layers used is provided.

  10. Futuristics and Geographic Education.

    ERIC Educational Resources Information Center

    Janiskee, Robert L.

    As geographers incorporate futuristics into geography instruction, they must develop an area of inquiry (geofuturistics) with a clearly defined purpose and direction. Geofuturistics is interpreted as futuristics involving the application of geographic skills, methods, and viewpoints in teaching and research. Although future-oriented research has…

  11. Ontologies of geographic information

    Microsoft Academic Search

    Helen Couclelis

    2010-01-01

    This article explores the notion of a system of ontologies specifically designed for the needs of an information science. A framework for geographic information ontologies is outlined that focuses on geographic information constructs rather than on the direct representation of real-world entities or on linguistic terms. The framework takes the form of a generative hierarchy anchored by the notion of

  12. The history of aeronautical medicine in Venezuela

    NASA Technical Reports Server (NTRS)

    Iriarte, D. R.

    1986-01-01

    The Aerial Medical Service of the Ministry of Transportation and Communications of Venezuela was created on June 1949, and later became the Department of Aeronautical Medicine. Its functions include the medical examinations of future pilots, navigators and flight engineers. The importance of good mental and physical health in all flight and ground personnel to ensure the safety of air travel is discussed.

  13. Venezuela: A Study of the Educational System of Venezuela and a Guide to the Academic Placement of Students from Venezuela in Educational Institutions of the United States.

    ERIC Educational Resources Information Center

    Hoover, Gary

    Written as a guide to be used in the admission and placement of Venezuelan students in U.S. institutions of higher education, this study discusses the education system of Venezuela. The role of education in modern Venezuela and the educational structure are summarized. Information is provided on preschool and primary education, intermediate…

  14. Geographic names of Antarctica

    USGS Publications Warehouse

    U.S. Board on Geographic Names; Department of the Interior; Burrill, Meredith F.; Bertrand, Kenneth J.; Alberts, Fred G.

    1956-01-01

    The geographic nomenclature of Antarctica was long in need of an overall systematic treatment, objective in approach and based upon thorough examination of all the evidence. The results of such treatment over a period of about three years were presented in Geographical Names of Antarctica, Special Publication No. 86 of the Board on Geographical Names, in May 1947, two supplements to which were issued in 1949 and 1951. The continuing program since that publication has now covered most of the geographic naming in Antarctica. As research has filled in many of the previous gaps in knowledge, a number of names have been modified and minor amendments have been made in the policies. This revised publication brings together the greatly enlarged body of names officially standardized for use by the United States Government, together with new pertinent background information.

  15. Geographic Names Information System

    USGS Publications Warehouse

    U.S. Geological Survey

    1984-01-01

    The Geographic Names Information System (GNIS) is an automated data system developed by the U.S. Geological Survey (USGS) to standardize and disseminate information on geographic names. GNIS provides primary information for all known places, features, and areas in the United States identified by a proper name. The information in the system can be manipulated to meet varied needs. You can incorporate information from GNIS into your own data base for special applications.

  16. Relational Geographic Databases

    Microsoft Academic Search

    Dehua Zhao; Byunggu Yu; Dan Randolph; Bong H. Hong

    This paper proposes a generic relational-database schema that can efficiently accommodate various types of GIS data. The proposed schema complies with the OpenGIS Simple Features Specification for SQL developed by OGC (OpenGIS Consortium) and can be used for any geographic application whose geographic objects are represented based on 2D geometry with linear interpolation between vertices. The generic schema that we

  17. Geographic Names Information System

    NSDL National Science Digital Library

    The US Geological Surveys online Geographic Names Information System contains data on nearly 2 million physical and cultural geographic features in the US. Facts include federally recognized feature name, feature type, elevation, estimated 1994 population of incorporated cities and towns, state and county in which the feature is located, latitude and longitude of the feature location, and more. Searches can be done by feature name or type, state, county name, elevation range, and population range. A simple but useful site.

  18. Resources for Geographers

    NSDL National Science Digital Library

    Christian, Lance.

    Maintained by Lance Christian and Kenneth Foote of the University of Colorado at Boulder Department of Geography, the Resources for Geographers Web site is an excellent source of information on the Internet for geographers. Links are offered for search engines, online journals, professional associations, research organizations, map collections, geo-spatial datasets, newsgroups and listservers, academic departments, jobs, educational resources, software, and miscellaneous other geography related resources.

  19. Geographic Information Systems

    PubMed Central

    Wieczorek, William F.; Delmerico, Alan M.

    2009-01-01

    This chapter presents an overview of the development, capabilities, and utilization of geographic information systems (GIS). There are nearly an unlimited number of applications that are relevant to GIS because virtually all human interactions, natural and man-made features, resources, and populations have a geographic component. Everything happens somewhere and the location often has a role that affects what occurs. This role is often called spatial dependence or spatial autocorrelation, which exists when a phenomenon is not randomly geographically distributed. GIS has a number of key capabilities that are needed to conduct a spatial analysis to assess this spatial dependence. This chapter presents these capabilities (e.g., georeferencing, adjacency/distance measures, overlays) and provides a case study to illustrate how GIS can be used for both research and planning. Although GIS has developed into a relatively mature application for basic functions, development is needed to more seamlessly integrate spatial statistics and models. The issue of location, especially the geography of human activities, interactions between humanity and nature, and the distribution and location of natural resources and features, is one of the most basic elements of scientific inquiry. Conceptualizations and physical maps of geographic space have existed since the beginning of time because all human activity takes place in a geographic context. Representing objects in space, basically where things are located, is a critical aspect of the natural, social, and applied sciences. Throughout history there have been many methods of characterizing geographic space, especially maps created by artists, mariners, and others eventually leading to the development of the field of cartography. It is no surprise that the digital age has launched a major effort to utilize geographic data, but not just as maps. A geographic information system (GIS) facilitates the collection, analysis, and reporting of spatial data and related phenomena. The capabilities of GIS are much more than just mapping, although map production is one of the most utilized features. GIS applications are relevant in a tremendous number of areas ranging from basic geographic inventories to simulation models. This chapter presents a general overview of geographic information system topics. The purpose is to provide the reader with a basic understanding of a GIS, the types of data that are needed, the basic functionality of these systems, the role of spatial analysis, and an example in the form of a case study. The chapter is designed to provide advanced students and experts outside of the field of GIS sufficient information to begin to utilize GIS and spatial analytic concepts, but it is not designed to be the sole basis for becoming a GIS expert. There is a tremendous level of sophistication related to the digital cartographic databases and manipulation of those databases underlying the display and use of GIS that is more appropriately a part of geographic information science (i.e., basic research issues associated with geographic data including technical as well as theoretical aspects such as the impact on society [1]) rather than being relevant to this chapter. The utilization of GIS for conducting spatial analysis is the guiding theme for the chapter. PMID:20717487

  20. Using the Five Themes of Geography to Teach about Venezuela.

    ERIC Educational Resources Information Center

    Sunal, Cynthia Szymanski; And Others

    1995-01-01

    Maintains that Venezuela has many U.S. ties because of its relative proximity and economic significance. Asserts that the Five Themes of Geography can be used to design effective classroom lessons about Venezuela. Presents five activities that include student objectives, necessary materials, and step-by-step instructional procedures. (CFR)

  1. The Dairy Technology System in Venezuela. Summary of Research 79.

    ERIC Educational Resources Information Center

    Nieto, Ruben D.; Henderson, Janet L.

    A study examined the agricultural technology system in Venezuela with emphasis on the dairy industry. An analytical framework was used to identify the strengths and weaknesses of the following components of Venezuela's agricultural technology system: policy, technology development, technology transfer, and technology use. Selected government…

  2. Rotación de presidentes ejecutivos y directores en Venezuela

    Microsoft Academic Search

    Urbi Garay; Maximiliano González

    2005-01-01

    (Disponible en idioma inglés únicamente) El propósito de este estudio es propiciar una mejor comprensión de las estructuras y los mecanismos de conducción empresarial fuera de Estados Unidos, observando una economía emergente específica: Venezuela. Primero formulamos un índice de prácticas de conducción empresarial de las compañías inscritas en bolsa, cuyos resultados generales indican que Venezuela exhibe puntajes de gestión empresarial

  3. Molecular and Antigenic Comparison of Ehrlichia canis Isolates from Dogs, Ticks, and a Human in Venezuela

    PubMed Central

    Unver, Ahmet; Perez, Miriam; Orellana, Nelson; Huang, Haibin; Rikihisa, Yasuko

    2001-01-01

    We previously culture isolated a strain of Ehrlichia canis, the causative agent of canine ehrlichiosis, from a human in Venezuela. In the present study, we examined whether dogs and ticks are infected with E. canis in Venezuela and, if so, whether this is the same strain as the human isolate. PCR analysis using E. canis-specific primers revealed that 17 of the 55 dog blood samples (31%) and all three pools of four Rhipicephalus sanguineus ticks each were positive. An ehrlichial agent (Venezuelan dog Ehrlichia [VDE]) was isolated and propagated in cell culture from one dog sample and was further analyzed to determine its molecular and antigenic characteristics. The 16S rRNA 1,408-bp sequence of the new VDE isolate was identical to that of the previously reported Venezuelan human Ehrlichia isolate (VHE) and was closely related (99.9%) to that of E. canis Oklahoma. The 5? (333-bp) and 3? (653-bp) sequences of the variable regions of the 16S rRNA genes from six additional E. canis-positive dog blood specimens and from three pooled-tick specimens were also identical to those of VHE. Western blot analysis of serum samples from three dogs infected with VDE by using several ehrlichial antigens revealed that the antigenic profile of the VDE was similar to the profiles of VHE and E. canis Oklahoma. Identical 16S rRNA gene sequences among ehrlichial organisms from dogs, ticks, and a human in the same geographic region in Venezuela and similar antigenic profiles between the dog and human isolates suggest that dogs serve as a reservoir of human E. canis infection and that R. sanguineus, which occasionally bites humans residing or traveling in this region, serves as a vector. This is the first report of culture isolation and antigenic characterization of an ehrlichial agent from a dog in South America, as well as the first molecular characterization of E. canis directly from naturally infected ticks. PMID:11473993

  4. NationalGeographic.com

    NSDL National Science Digital Library

    The National Geographic Society homepage is a gateway to sites about adventure and expedition, nature and conservation, history and culture, weather and natural forces, dinosaurs and the ancient world, science and space, maps and geography, and animals. There are also kids education sites, magazines, and news.

  5. Geographic Education in Louisiana

    ERIC Educational Resources Information Center

    Lewis, Anthony J.

    2004-01-01

    In this article, the author analyzes and summarizes geographic education in Louisiana from a historical perspective with a specific emphasis on the degree to which geography was implemented into the state's standards. To accomplish that, he draws from the following three sources of information: active and retired social studies teachers from a…

  6. Geographic information systems

    USGS Publications Warehouse

    U.S. Geological Survey

    1992-01-01

    Geographic information systems (GIS) technology can be used for scientific investigations, resource management, and developmental planning. For example, a GIS might allow emergency planners to easily calculate emergency response times in the event of a natural disaster, or a GIS might be used to find wetlands that need protection form pollution.

  7. Minimum variance geographic sampling

    NASA Technical Reports Server (NTRS)

    Terrell, G. R. (principal investigator)

    1980-01-01

    Resource inventories require samples with geographical scatter, sometimes not as widely spaced as would be hoped. A simple model of correlation over distances is used to create a minimum variance unbiased estimate population means. The fitting procedure is illustrated from data used to estimate Missouri corn acreage.

  8. Geograph British Isles

    NSDL National Science Digital Library

    There are a number of available photo weblogs that aim to offer a representative view of various cities, locales, or certain landforms around different parts of the world. The Geograph British Isles website aims to collect a geographically representative photograph for every single square kilometer of the British Isles, and so far it would be fair to say they are doing a fine job. Users of the site may elect to contribute their own photographs, or browse through the existing photos using an interactive map of the British Isles or through a search engine. To get some sense of what people are photographing for the project, visitors can look at the recent photos section on the right-hand side of the site's homepage. They may also want to peek in at the community forums, which seem to have a number of lively discussions going on regarding the site and the photos [Note: Registration is required to enter this part of the site

  9. National Geographic: Environment

    NSDL National Science Digital Library

    The Environment section of the National Geographic website has so many photos, quizzes, blogs, games and news to learn from and enjoy, that visitors will probably have to make a number of return visits. For those with only a little time, visitors absolutely must check out the link "News Blog: Greatest Nature Photos" under the "Environment News" heading near the top of the page. There visitors will see several of the 40 greatest nature photos that were chosen by a conservation photography organization in celebration of Earth Day 2010. "Test your Earth IQ" quizzes on backyard birds, Yosemite, pollution, natural disasters, and going green will keep visitors plenty busy, and the quizzes are also a great way to learn something new. The "NG in the Field" section reports on the grantees of National Geographic grants. Some of the projects include, "Big Cats Initiatives", "Blue Holes Project", and "Quintana Roo Underwater Cave Project".

  10. National Geographic: Maps

    NSDL National Science Digital Library

    2012-01-13

    Many people have fond memories of the special maps created as inserts placed in the National Geographic magazine from time to time. This rather special section of the National Geographic's website provides interested parties with a dazzling array of thematic maps that document the European exploration of North America, ecological zones, and the world of the poet Basho. Visitors might do well to start by looking over the "Editors' Picks" area. Here they will find atlas jigsaw puzzles to play online and "EarthPulse: A Visual Guide to Trends." The "EarthPulse" area includes vital statistics about global population trends, economic opportunity, and more. The site also includes the "Atlas Explorer", which allows users to explore detailed political maps of the USA, Africa, Europe, and the world's oceans.

  11. Perceiving geographical slant

    Microsoft Academic Search

    Dennis R. Proffitt; Mukul Bhalla; Rich Gossweiler; Jonathan Midgett

    1995-01-01

    People judged the inclination of hills viewed either out-of-doors or in a computer-simulated virtual environment. Angle judgments\\u000a were obtained by having people (1) provide verbal estimates, (2) adjust a representation of the hill’s cross-section, and\\u000a (3) adjust a tilt board with their unseen hand. Geographical slant was greatly overestimated according to the first two measures,\\u000a but not the third. Apparent

  12. The National Map - Geographic Names

    USGS Publications Warehouse

    U.S. Geological Survey

    2002-01-01

    Governments depend on a common set of base geographic information as a tool for economic and community development, land and natural resource management, and health and safety services. Emergency management and homeland security applications rely on this information. Private industry, nongovernmental organizations, and individual citizens use the same geographic data. Geographic information underpins an increasingly large part of the Nation's economy.

  13. Volunteered Geographic Information in Wikipedia

    ERIC Educational Resources Information Center

    Hardy, Darren

    2010-01-01

    Volunteered geographic information (VGI) refers to the geographic subset of online user-generated content. Through Geobrowsers and online mapping services, which use geovisualization and Web technologies to share and produce VGI, a global digital commons of geographic information has emerged. A notable example is Wikipedia, an online collaborative…

  14. View of the Caribbean coast of Venezuela

    NASA Technical Reports Server (NTRS)

    1973-01-01

    A near vertical view of the Caribbean coast of Venezuela is seen in this Skylab 3 Earth Resources Experiment Package S190-B (five-inch earth terrain camera) photograph taken from the Skylab space station in Earth orbit. The large body of water is the Golfo de Venezuela; and the major land mass is the Peninsula de Paraguana. The view is looking northward from the mouth of the Golfete de Coro and Punta Cardon to Punta Macolia. The peninsula is connected to the Venezuelan mainland by the narrow strip of land in the most easterly corner of the picture. The dry, arid climate of the peninsula is indicated by sparse vegetation and the abundance of sand dunes. The highest point is about 2,700 feet above the sea and is the conspicuous black spot. Old raised shorelines features appear as streaks parallel to the Golfete de Coro. Water of the Golfete de Coro is red from the high sediment content. The streaks in the water off the peninsula is apparently an effect of wind which is blowing sand and w

  15. Horizonal and Vertical Spatial Patterns of Radon and Other Soil-gases Across the El Pilar Fault Trace at Guaraphiche, Edo. Surce (Venezuela)

    NASA Astrophysics Data System (ADS)

    LaBrecque, J. J.

    2002-05-01

    Soil-gases (radon, thoron, carbon dioxide and hydrogen) were measured at 63-cm depths along a transect perpendicular to the rupture (fault trace) from the 1997 Caricao earthquake (Mw=6.9) at Guarapiche, state of Sucre (Venezuela). The transect was about 40 meters long with ten sampling points with the spacings was smaller near the rupture. The shapes of the horizontal spatial patterns for radon (Rn-222), thoron (Rn-220) and total radon (Rn-222+Rn-220) were similar; the gas concentrations increased from both ends of the transect toward the rupture where a dip (valley) occurred. Both carbon dioxide and hydrogen gases showed anomalous values at the same sampling points. Twin peaks (anomalies) had been previously reported and suggested that they were due to blockage in the rupture. We have also determined soil-gases from 25-cm to 155-cm depths near the rupture and at the ends of the transect. The results showed that the soil-gas concentrations were not only higher in the upper levels (less than 65-cm) near the fault trace but were similar or greater than the lower levels. Thus, producing the twin peaks when soil-gas sampling was performed at the 65-cm depth. When the sampling was performed at only 45-cm depth the dip over the rupture was much less and the patterns looked more like a broad doublet peak. In conclusion, one can clearly see that not only positive soil-gas anomalies can occur over a fault trace but also negative ones too. 1) This work was partially funded by a research contract from the Venezuelan National Science Foundation (CONICIT Proyecto S1-95000448). 2) Mailing Address: Centro de Quimica, 8424 NW 56th Street, Suite 00204,Miami, Fl 33166 (USA). E-mail jjlabrec@ivic.ve FAX: +58-212-504-1214

  16. Geographical Influences on Climate

    NSDL National Science Digital Library

    In this lesson students use climatograms from different U.S. locations to observe patterns in temperature and precipitation. After describing geographical features near these locations, they will use graphs to compare and find patterns in the effects that mountains, oceans, elevation, and latitude have on temperature and precipitation. A research activity will then ask students to gather information on temperature and precipitation patterns around the world using the MY NASA DATA Live Access Server and other sources, with the goal of creating their own climatogram. This lesson uses the 5E instructional model.

  17. Hydrogen: BOC-FW venture secures major Venezuela project

    SciTech Connect

    Wood, A.

    1995-07-26

    BOC Gases and Foster Wheeler Power Systems (FW) have been awarded a $50-million project to supply a 50-million cu ft/day hydrogen (H{sub 2}) plant to Lagoven`s Amuay, Venezuela refinery for 1997 startup. BOC and FW have also formed a marketing agreement for on-site H{sub 2} plants in the Americas, extending a previous relationship covering Chile and Venezuela.

  18. Digital shaded-relief map of Venezuela

    USGS Publications Warehouse

    Garrity, Christopher P.; Hackley, Paul C.; Urbani, Franco

    2004-01-01

    The Digital Shaded-Relief Map of Venezuela is a composite of more than 20 tiles of 90 meter (3 arc second) pixel resolution elevation data, captured during the Shuttle Radar Topography Mission (SRTM) in February 2000. The SRTM, a joint project between the National Geospatial-Intelligence Agency (NGA) and the National Aeronautics and Space Administration (NASA), provides the most accurate and comprehensive international digital elevation dataset ever assembled. The 10-day flight mission aboard the U.S. Space Shuttle Endeavour obtained elevation data for about 80% of the world's landmass at 3-5 meter pixel resolution through the use of synthetic aperture radar (SAR) technology. SAR is desirable because it acquires data along continuous swaths, maintaining data consistency across large areas, independent of cloud cover. Swaths were captured at an altitude of 230 km, and are approximately 225 km wide with varying lengths. Rendering of the shaded-relief image required editing of the raw elevation data to remove numerous holes and anomalously high and low values inherent in the dataset. Customized ArcInfo Arc Macro Language (AML) scripts were written to interpolate areas of null values and generalize irregular elevation spikes and wells. Coastlines and major water bodies used as a clipping mask were extracted from 1:500,000-scale geologic maps of Venezuela (Bellizzia and others, 1976). The shaded-relief image was rendered with an illumination azimuth of 315? and an altitude of 65?. A vertical exaggeration of 2X was applied to the image to enhance land-surface features. Image post-processing techniques were accomplished using conventional desktop imaging software.

  19. National Geographic Magazine: Photosynth

    NSDL National Science Digital Library

    It would be pretty great to fly close by over the ponderous 16th century castle of El Morro in San Juan, but it could be a pricey proposition, and you might garner some unwanted attention from Puerto Rican officials. Well, there is another option, and that is to take in El Morro (and many other world landmarks) via the National Geographic Magazine's Photosynth website. The site draws on technology developed by Microsoft, and essentially takes a large collection of photos, analyzes them for similarities, and stitches them together to create a rather fine immersive experience. Visitors are also welcome to submit their own photos for inclusion in this project, and landmarks currently under construction include Petra, the Sydney Opera House, and Seattle's Space Needle. Also, visitors will need to download the free Photosynth software to take full advantage of the site.

  20. Geographic names information system

    USGS Publications Warehouse

    U.S. Geological Survey

    1987-01-01

    of the data in each of the data elements of the four data bases of GNIS. The GNIS program, which includes the automated names system and the National Gazetteer program, is a coordinated effort under the direction of Donald J. Orth, Chief of the Branch of Geographic Names. The automated system was initially developed by Sam Stulberg and Roger L. Payne. System enhancement and software development is coordinated by Judy J. Stella, head programmer for GNIS, and special projects coordinator is Louis A. Yost IV. Coordination of the research and compilation of certain gazetteers is directed by Robin D. Worcester with research assistance and support from Jon Campbell, Linda S. Davis, and Nancy Engel.

  1. National Geographic: Redwoods

    NSDL National Science Digital Library

    Astounding, beautiful, fantastical, and enormous, these are all apt descriptions of the redwoods of the Pacific coast. National Geographic's website offers a multimedia presentation about these majestic trees which includes the cover story, "The Super Trees", from their October 2009 magazine, and details under "Tune In", on when to watch the corresponding broadcast "Explorer: Climbing Redwood Giants". In addition to an online photo "Jigsaw Puzzle" of a 300-foot California redwood that visitors can time themselves putting together, there is also a great 2.5-minute "Video" of the photographer's attempt to create a composite photo of an entire redwood tree. The "Living Giants" interactive time line shows the historical moments a 2000-year-old redwood has lived through, including the reign of Genghis Khan, the signing of the Magna Carta, and the settlement at Jamestown.

  2. USGS Geographic Data Download

    NSDL National Science Digital Library

    The US Geological Survey Geographic (USGS) Data Download Web site contains a large selection of downloadable digital elevation models (DEM) in various formats. Visitors will find links to 1:250,000 Scale Digital Elevation Models, 1:24,000 Scale Digital Elevation Models, 30 Meter Resolution National Elevation Dataset, 1:2,000,000 Digital Line Graphs, 1:100,000 Scale Digital Line Graphs, 1:24,000 Scale Digital Line Graphs, 1:250,000 and 1:100,000 Scale Land Use Land Cover, National Land Cover Data, and National Hydrography Dataset. The site provides examples, status maps, user guides, and other information about each data set, making it a great overall resource for these helpful topographic models. [JAB

  3. National Geographic-Adventure

    NSDL National Science Digital Library

    The promise of any sort of adventure can be a magic tonic to any rather dull and ordinary day. National Geographic knows a few things about adventure, and this website brings together fascinating photographs, essays, itineraries, and other items that will be most useful to the casual or extreme adventurer. Visitors can look over the "Beyond the Edge" blog, which features everything from meditations on skiing the Jackson Hole backcountry to a video tour of the Powder Highway in British Columbia. Users shouldn't miss some of the "best of" lists here, which include "World's Best Ski Towns" and "Word's Best Surf Towns." A list that will give cause for inspiration (and perhaps debate) is the "Ultimate Adventure Bucket List," which includes activities like hiking up to Machu Picchu and a trek around Java's volcanoes.

  4. Center of Excellence for Geographic Education South Carolina Geographic Alliance

    E-print Network

    Almor, Amit

    Center of Excellence for Geographic Education South Carolina Geographic Alliance Earthquakes in South Carolina: Bridging the Social and Science Divide for K-12 Educators Saturday, November 3, 2012 9:00 AM ­ 3:00 PM University of South Carolina Upstate, Spartanburg, South Carolina This one-day workshop

  5. Oil Slicks on Lake Maracaibo, Venezuela

    NASA Technical Reports Server (NTRS)

    2003-01-01

    Several oil slicks occurred on Lake Maracaibo in northwestern Venezuela between December 2002 and January 2003, and were observed by various satellite instruments. These images from the Multi-angle Imaging SpectroRadiometer (MISR) provide new information relating to one such event near the center of Lake Maracaibo on December 26, 2002.

    In unpolluted areas, the water surface is 'ruffled' by wind and the resulting wave facets divert reflected rays into many directions. An oil film dampens the presence of small wind-driven 'capillary' waves, resulting a smoother, more mirror-like surface. Also, oil is more strongly absorbing than the surrounding water. Therefore, at most viewing angles, a surface slick will appear darker than the surrounding unpolluted areas, whereas near the specular angle (the angle at which a perfect mirror reflects light) it will appear brighter. Simultaneous observation at multiple view angles therefore enhances the reliability of oil-slick detection using optical imaging.

    An example of how the optical contrast of an oil film on a water surface changes as a function of viewing angle is illustrated by these false-color MISR images, comprised of near-infrared, red and blue spectral data at three different angles, using the vertical-viewing camera (left), the 26o-forward-viewing camera (center) and the 46o-forward-viewing camera (right). A swirly area in the middle of the lake appears darker than the surrounding waters at both the nadir and 46o views, but brighter than the surrounding waters at the 26o view. Of the three images, only the 26o camera observes close to specular reflection angle.

    Lake Maracaibo is the largest lake in South America. The lake is somewhat saline, since it is connected to the Gulf of Venezuela by a narrow strait in the north. Venezuela is the largest oil producing nation in the Western Hemisphere, and the Lake Maracaibo basin includes the largest oil fields and almost a quarter of this nation's population.

    The Multi-angle Imaging SpectroRadiometer observes the daylit Earth continuously from pole to pole, and every 9 days views the entire globe between 82 degrees north and 82 degrees south latitude. These data products were generated from a portion of the imagery acquired during Terra orbit 16081. The panels cover an area of 72 kilometers x 225 kilometers, and utilize data from blocks 81 to 83 within World Reference System-2 path 8.

    MISR was built and is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Office of Earth Science, Washington, DC. The Terra satellite is managed by NASA's Goddard Space Flight Center, Greenbelt, MD. JPL is a division of the California Institute of Technology.

  6. Geographic Human-Computer Interaction

    E-print Network

    Priedhorsky, Reid

    Geographic Human-Computer Interaction Abstract Researchers and practitioners in human-computer, spatio-temporal Introduction Prior to the turn of the century, the use of computer- based geographic areas as natural user interfaces, social computing, mobile computing, social network analysis

  7. Geographical Agglomeration in Australian Manufacturing

    Microsoft Academic Search

    Anne Leahy; Alfons Palangkaraya; Jongsay Yong

    2010-01-01

    Leahy A., Palangkaraya A. and Yong J. Geographical agglomeration in Australian manufacturing, Regional Studies. This paper investigates geographical agglomeration of Australian manufacturing industries from 1993–1994 to 1996–1997. It is found that although agglomeration increased substantially during the period, it was still less than in other developed economies such as the United States, the UK, France, and Ireland. Using a common

  8. Mental Processing of Geographic Knowledge

    Microsoft Academic Search

    Thomas Barkowsky

    2001-01-01

    The contribution presents a computational modeling approach to geographic knowledge processing in mind. Geographic knowledge is assumed to be stored in a piecemeal manner. Spatial knowledge fragments form a hierarchical structure of lean knowledge. An actual mental image representation is constructed when needed to perform a specific task. In this construction process missing information is complemented to create a determinate

  9. Geographic Indexing for Bibliographic Databases

    Microsoft Academic Search

    Linda L. Hill

    1989-01-01

    Geographic indexing is usually handled in the same way as other indexing; that is, through the use of controlled vocabulary, often in a hierarchical arrangement from broad region (e.g., continent) to smaller regions (e.g., country, county, geologic province, topographic feature, city). But a geographic location can also be described by map reference points (geocoding), such as a set of latitudes

  10. Unscaled Scaled (% / km) Geographic Area /

    E-print Network

    226 Unscaled Scaled (% / km) Geographic Area / Assessment Unit DI Prod. N(eq) Sum Total Cumu subbasin, Washington. Geographic Area / Assessment Unit IntegratedPriorityRestoration Category Habitat% (unscaled results) of the combined protection benefit for summer steelhead within the Methow basin, and 51

  11. Malaria Control and Elimination,1 Venezuela, 1800s–1970s

    PubMed Central

    Villegas, Leopoldo; Udhayakumar, Venkatachalam

    2014-01-01

    Venezuela had the highest number of human malaria cases in Latin American before 1936. During 1891–1920, malaria was endemic to >600,000 km2 of this country; malaria death rates led to major population decreases during 1891–1920. No pathogen, including the influenza virus that caused the 1918 pandemic, caused more deaths than malaria during 1905–1945. Early reports of malaria eradication in Venezuela helped spark the world’s interest in global eradication. We describe early approaches to malaria epidemiology in Venezuela and how this country developed an efficient control program and an approach to eradication. Arnoldo Gabaldón was a key policy maker during this development process. He directed malaria control in Venezuela from the late 1930s to the end of the 1970s and contributed to malaria program planning of the World Health Organization. We discuss how his efforts helped reduce the incidence of malaria in Venezuela and how his approach diverged from World Health Organization guidelines.

  12. Coloring geographical threshold graphs

    SciTech Connect

    Bradonjic, Milan [Los Alamos National Laboratory; Percus, Allon [Los Alamos National Laboratory; Muller, Tobias [EINDHOVEN UNIV. OF TECH

    2008-01-01

    We propose a coloring algorithm for sparse random graphs generated by the geographical threshold graph (GTG) model, a generalization of random geometric graphs (RGG). In a GTG, nodes are distributed in a Euclidean space, and edges are assigned according to a threshold function involving the distance between nodes as well as randomly chosen node weights. The motivation for analyzing this model is that many real networks (e.g., wireless networks, the Internet, etc.) need to be studied by using a 'richer' stochastic model (which in this case includes both a distance between nodes and weights on the nodes). Here, we analyze the GTG coloring algorithm together with the graph's clique number, showing formally that in spite of the differences in structure between GTG and RGG, the asymptotic behavior of the chromatic number is identical: {chi}1n 1n n / 1n n (1 + {omicron}(1)). Finally, we consider the leading corrections to this expression, again using the coloring algorithm and clique number to provide bounds on the chromatic number. We show that the gap between the lower and upper bound is within C 1n n / (1n 1n n){sup 2}, and specify the constant C.

  13. National Geographic: Photography

    NSDL National Science Digital Library

    The exquisite visual offerings created by National Geographic over the past 125 years are well known by the general public around the world. This fine corner of their website brings together the work of their many fine staff photographers, videographers, and community members who contribute to this expansive brocade. After creating a free login, visitors can start their journey through the site by looking over the Photo of the Day or the "Best ofâ?¦" slideshows that bring together highlights from past months. The "Editors' Picks" area offers thematic collections, such as "Photographing Lions," "Tel Aviv," "Patterns in Nature: Water" and "The Space Between." Shutterbugs will enjoy the online tutorials and tips contained in the "Photography Tips" area. Here they will find detailed suggestions on how to photograph details, urban landscapes, the night sky, and many other settings, times, and vistas. Finally, the site contains the "Featured Bios" area which has details on some of the fine photographers profiled here, including Paul Nicklen, Joel Sartore, and Mark Thiessen.

  14. Atmospheric formic and acetic acids in Venezuela

    NASA Astrophysics Data System (ADS)

    Sanhueza, Eugenio; Figueroa, Luis; Santana, Magaly

    Gas, phase and rain concentrations of HCOOH and CH 3COOH have been measured at various sites in the savannah climatic region, a cloud forest site and a coastal site in Venezuela. Gas phase and rain water were sampled using the aqueous scrubber technique and a wet only collector, respectively. Analyses were made by ion chromatography. The results indicate that formic and acetic acids are important components of the Venezuelan atmosphere. They are homogeneously distributed, suggesting a widespread source. Boundary layer concentrations during the dry season (HCOOH, 1.8 ppbv; CH 3COOH, 1.25 ppbv) are higher than in the wet season (HCOOH, 1.0 ppbv; CH 3COOH, 0.7 ppbv), mainly due to a longer lifetime of the acid during the dry season (˜6 days) compared with the wet season (˜2 days). The overall concentrations in rain are 7.0 and 4.0 ?M for formic and acetic acids, respectively. The estimated annual total depositions are: HCOOH, 17 mmol m -2 yr -1 and CH 3COOH,10 mmol m -2 yr -1; around half of the acids are removed by dry deposition. It is established that a larger source (˜1.8 times) of both acids is present during the wet season. We speculate that atmospheric oxidation of hydrocarbons should be the main source of HCOOH and CH 3COOH in the Venezuelan atmosphere; soil emissions could make a significant contribution during the dry season.

  15. Syllidae (Annelida, Polychaeta) from the Caribbean coast of Venezuela

    PubMed Central

    Liñero-Arana, Ildefonso; Díaz Díaz, Oscarn

    2011-01-01

    Abstract Venezuela possesses a great variety of coastal environments allowing for a high diversity of marine species. However, systematic studies on marine invertebrates are scarce, especially on polychaetes. The family Syllidae is poorly known, and only 14 genera and 42 species have been reported from this country. A total of 13 genera and 26 species the Syllidae were identified from benthic samples collected on different substrata of the northeastern coast of Venezuela. Of these, seven genera and 16 species constitute new records for Venezuela: Odontosyllis guillermoi, Syllides floridanus, Salvatoria clavata, Salvatoria limbata, Sphaerosyllis longicauda, Parapionosyllis longicirrata, Trypanosyllis parvidentata, Trypanosyllis vittigera, Opisthosyllis sp., Syllis amica, Syllis armillaris, Syllis gracilis, Syllis pseudoarmillaris, Syllis vittata, Parasphaerosyllis indica and Myrianida convoluta. PMID:21998503

  16. Mycobacterium tuberculosis ecology in Venezuela: epidemiologic correlates of common spoligotypes and a large clonal cluster defined by MIRU-VNTR-24

    PubMed Central

    2009-01-01

    Background Tuberculosis remains an endemic public health problem, but the ecology of the TB strains prevalent, and their transmission, can vary by country and by region. We sought to investigate the prevalence of Mycobacterium tuberculosis strains in different regions of Venezuela. A previous study identified the most prevalent strains in Venezuela but did not show geographical distribution nor identify clonal genotypes. To better understand local strain ecology, we used spoligotyping to analyze 1298 M. tuberculosis strains isolated in Venezuela from 1997 to 2006, predominantly from two large urban centers and two geographically distinct indigenous areas, and then studied a subgroup with MIRU-VNTR 24 loci. Results The distribution of spoligotype families is similar to that previously reported for Venezuela and other South American countries: LAM 53%, T 10%, Haarlem 5%, S 1.9%, X 1.2%, Beijing 0.4%, and EAI 0.2%. The six most common shared types (SIT's 17, 93, 605, 42, 53, 20) accounted for 49% of the isolates and were the most common in almost all regions, but only a minority were clustered by MIRU-VNTR 24. One exception was the third most frequent overall, SIT 605, which is the most common spoligotype in the state of Carabobo but infrequent in other regions. MIRU-VNTR homogeneity suggests it is a clonal group of strains and was named the "Carabobo" genotype. Epidemiologic comparisons showed that patients with SIT 17 were younger and more likely to have had specimens positive for Acid Fast Bacilli on microscopy, and patients with SIT 53 were older and more commonly smear negative. Female TB patients tended to be younger than male patients. Patients from the high incidence, indigenous population in Delta Amacuro state were younger and had a nearly equal male:female distribution. Conclusion Six SIT's cause nearly half of the cases of tuberculosis in Venezuela and dominate in nearly all regions. Strains with SIT 17, the most common pattern overall may be more actively transmitted and SIT 53 strains may be less virulent and associated with reactivation of past infections in older patients. In contrast to other common spoligotypes, strains with SIT 605 form a clonal group centered in the state of Carabobo. PMID:19660112

  17. Evaluation of GO_CONS_GCF_2_TIM and GOCO01S Geopotential Models in Venezuela and Caribbean Region

    NASA Astrophysics Data System (ADS)

    Orihuela, N. D.; Garcia, A. D.; Tabare, T.; Scientific Team Of Venezuelan; Caribbean Crustal Study From Satellital Data

    2010-12-01

    This paper shows two maps of the magnitude of the surface gravity vector (MSGV) of Venezuela and Caribbean region at 1:500.000 scale in the geographic window between the 0-20 north latitude and 74-58 western longitude (Fig. 1 and Fig. 2), that were generated from GOCE gravity gradients data provided by the European Space Agency (ESA). The maps that are showed come from the combined global gravity field model GOCO01s [GOCO Consortium., 2010] and from the satellite-only global gravity field model GO_CONS_GCF_2_TIM [Pail et al., 2010], both of 224 degree. The DEMs used for the evaluation of the MSGV are: Etopo2v2 [NGDC., 2006] and Etopo1 [Amante and Eakins, 2009] respectively. The data processing was done using: Shm2func [ICGEM., 2007]; Goce User Toolbox [ESA., 2009]; Gravsoft package [Tscherning et al., 1992] and Oasis Montaj (Geosoft). This research shows a review of observed gravity in the main geological provinces of the Venezuela and Caribbean region geography, revealing gravitational features important of the geological structures that are in Venezuelan and Caribbean subsurface.

  18. Events affecting gold exploration in Venezuela since 1999

    USGS Publications Warehouse

    Wilburn, David R.

    2014-01-01

    The structure of the gold mining industry in Venezuela has changed significantly since 1999 as a result of Government policy changes and industry response to these changes. This report documents the policy decisions that have affected the mining industry, discusses the response of the industry on a site by site basis, and suggests possible effects of these changes on the global economy. For the short term, at least, it appears that these changes have made Venezuela a more difficult place to invest for U.S. and Canadian companies, while investment by Chinese entities has been encouraged.

  19. Complete genome sequences of two begomoviruses infecting weeds in Venezuela.

    PubMed

    Fiallo-Olivé, Elvira; Chirinos, Dorys T; Geraud-Pouey, Francis; Moriones, Enrique; Navas-Castillo, Jesús

    2013-01-01

    The complete sequences of isolates of two new bipartite begomoviruses (genus Begomovirus, family Geminiviridae) found infecting weeds in Venezuela are provided. The names proposed for these new begomoviruses are "Datura leaf distortion virus" (DLDV), isolated from a Datura stramonium L. (family Solanaceae) plant, and "Dalechampia chlorotic mosaic virus" (DCMV), isolated from infected Dalechampia sp. (family Euphorbiaceae) and Boerhavia diffusa L. (family Nyctaginaceae) plants. Phylogenetic analysis showed that these new begomoviruses segregated in two distinct clades of New World begomoviruses. To our knowledge, this is the first record of a begomovirus infecting Dalechampia sp. plants. Also, this is the first report of a begomovirus infecting Boerhavia spp. and Datura spp. in Venezuela. PMID:22926716

  20. New Techniques for Geographic Routing

    E-print Network

    Leong, Ben

    2006-06-14

    As wireless sensor networks continue to grow in size, we are facedwith the prospect of emerging wireless networks with hundreds orthousands of nodes. Geographic routing algorithms are a promisingalternative to tradition ...

  1. Geographic Information Systems & Science Funding

    Cancer.gov

    Special grant applications in Geographic Information Systems are not currently being solicited by the Surveillance Research Program or by the National Cancer Institute. When there are solicitations, notice of them will be posted here.

  2. The Operative Role of Geographers

    ERIC Educational Resources Information Center

    Beaujeu-Garnier, Jacqueline

    1975-01-01

    This article discusses practical contributions which geographers can make to world societies in social and economic areas such as that of development planning. For address of journal see SO 504 028. (RM)

  3. The Bocono Fault Zone, Western Venezuela

    SciTech Connect

    Schubert, C. (I.V.I.C., Caracas (Venezuela)); Estevez, R. (Universidad de los Andes, Merida (Venezuela)); Henneberg, H.G. (Universidad del Zulia, Maracaibo (Venezuela))

    1993-02-01

    The Bocono Fault Zone, the western part of the Bocono Moron-El Pilar Fault System of the southern Caribbean plate boundary, consists of aligned valleys, linear depressions, pull-apart basins and other morphological features, which extend for about 500 km in a N45[degrees]E direction, between the Tachira depression (Venezuela-Colombia border) and the Caribbean Sea. It crosses obliquely the Cordillera de Merida and cuts across the Caribbean Mountains, two different geologic provinces of Late Tertiary-Quaternary and Late Cretaceous-Early Tertiary age, respectively. Therefore, the maximum age that can be assigned to the Bocono Fault Zone is Late Tertiary (probably Pliocene). A total maximum right-lateral offset rate of 3.3 mm/a. The age of the sedimentary fill o[approximately] the La Gonzalez pull-apart basin suggests that the 7-9 km right-lateral offset necessary to produce it took place in Middle to Late Pleistocene time. The majority of seismic events are well aligned with the main fault trace; minor events are distributed in a belt several kilometers wide. Focal depth is typically 15 km and focal mechanisms indicate an average east-west compression across the zone. Return periods of 135-460 a (Richter M = 8), 45-70 a (M = 7), and 7-15 a (M = 6) have been calculated. Geodetic studies of several sites along the zone indicate compressive and right-lateral components; at Mucubaji the rate of right-lateral displacement observed is about 1 mm every 5 months (15 a of measurements).

  4. Original article Honey production in Venezuela: effects of feeding

    E-print Network

    Paris-Sud XI, Université de

    Original article Honey production in Venezuela: effects of feeding sugar syrup on colony weight Honey Bee Breeding, Genetics, and Physiology Laboratory, USDA, ARS, 1157 Ben Hur Road, Baton Rouge, LA, 70820; 3 Honey Bee Research, USDA, ARS, 2413 E Hwy 83, Bldg 205, Weslaco, TX 78596; 4J Whitten Research

  5. Genetic Characterization of Rabies Field Isolates from Venezuela

    Microsoft Academic Search

    CARLOS A. DEMATTOS; CECILIA C. DEMATTOS; JEAN S. SMITH; EDITH T. MILLER; SARA PAPO; ANTONIO UTRERA; ANDBENNIE I. OSBURN

    Twenty samples from cases of rabies in humans and domestic animals diagnosed in Venezuela between 1990 and 1994 and one sample from a vampire bat collected in 1976 were characterized by reactivity to monoclonal antibodiesagainsttheviralnucleoproteinandbypatternsofnucleotidesubstitutioninthenucleoproteingene. Three antigenic variants were found: 1, 3, and 5. Antigenic variant 1 included all samples from dogs and humans infected by contact with rabid dogs.

  6. Setting priorities for the conservation of Venezuela's threatened birds

    Microsoft Academic Search

    Jon Paul Rodríguez; Franklin Rojas-Suárez; Christopher J. Sharpe

    2004-01-01

    We develop and apply a four-dimensional priority-setting process for the conservation of threat- ened birds in Venezuela. The axes that we consider are extinction risk, degree of endemicity, taxonomic unique- ness and public appeal. Alhough the first three are relatively objective measures of biological attributes, the last one is a subjective judgement of the likelihood that conservation actions in favour

  7. Molecular Epidemiologic Source Tracking of Orally Transmitted Chagas Disease, Venezuela

    PubMed Central

    Segovia, Maikell; Martínez, Clara E.; Messenger, Louisa A.; Nessi, Anaibeth; Londoño, Juan C.; Espinosa, Raul; Martínez, Cinda; Alfredo, Mijares; Bonfante-Cabarcas, Rafael; Lewis, Michael D.; de Noya, Belkisyolé A.; Miles, Michael A.; Llewellyn, Martin S.

    2013-01-01

    Oral outbreaks of Chagas disease are increasingly reported in Latin America. The transitory presence of Trypanosoma cruzi parasites within contaminated foods, and the rapid consumption of those foods, precludes precise identification of outbreak origin. We report source attribution for 2 peri-urban oral outbreaks of Chagas disease in Venezuela via high resolution microsatellite typing. PMID:23768982

  8. [Molecular characterization of Sigmodon hirsutus (Rodentia: Cricetidae) populations in Venezuela].

    PubMed

    Lessmann, Janeth; Arrivillaga, Jazzmín; Aguilera, Marisol

    2011-06-01

    Recent phylogenetic studies based on cytochrome b gene sequence, have determined that the species historically known as Sigmodon hispidus (Rodentia) from South America comprises a species S. hirsutus of paraphyletic origin. The aim of this study was to test the hypothesis that populations from Venezuela, represent the sensu strict form, ancestral haplotypes, and monophyletic subspecieS. For this, 12 individual sequences from three localities of different biogeographic regions in Venezuela were evaluated and sequenced based on cyto b. Additionally, the sequences were used to develop a cladistic analysis and genetic distance calculations, and to compare this information with two individual sequences of Sigmodon specimens available in Genbank. Phylogenetic analyses show that the three populations of S. hirsutus of Venezuela form an ancestral and monophyletic subclade supported by high bootstrap values and significant genetic distance between subclade within the S. hirsutus. Besides, the existence of two lineages suggests two subspecies, S. hirsutus hirsutus from Venezuela, and S. hirsutus mexicanus from Mexico-Central America, but, both species need formal description. PMID:21721239

  9. Epidemiologic aspects of arterial hypertension in Maracaibo, Venezuela

    Microsoft Academic Search

    T Sulbarán; E Silva; G Calmón; A Vegas

    2000-01-01

    The purpose of this study was to determine the prevalence of arterial hypertension (HT) awareness and the influence of age, sex and body mass index on the degree of control of HT in the population of Maracaibo, State of Zulia, Venezuela. It included 7424 subjects, 3640 males (M) and 3784 females (F). Information was collected through domiciliary visits with a

  10. MODIS detects oil spills in Lake Maracaibo, Venezuela

    Microsoft Academic Search

    Chuanmin Hu; Frank E. Müller-Karger; Douglas Myhre; Brock Murch; Ana L. Odriozola; Gonzalo Godoy

    2003-01-01

    Starting December 2002, the oil industry operating in and around Lake Maracaibo in Venezuela suffered a series of accidents (Figure 1). Fires, the sinking of two barges, rupture of oil pipelines, spills from floating oil storage and transfer stations, and malfunctioning of oil extraction platforms led to extensive oil spills. Local and federal Venezuelan government oil industry experts directly observed

  11. Sandfly fauna of endemic leishmaniasis foci in Anzoátegui State, Venezuela.

    PubMed

    González, R; Jorquera, A; De Sousa, L; Ledezma, E; Devera, R

    2002-01-01

    A census of the sandfly fauna was undertaken in 1993-98 in 5 endemic leishmaniasis foci situated at different altitudes in Anzoátegui State, Venezuela. From the 17 species of Lutzomyia identified, we believe that Lu. ovallesi, Lu. panamensis and Lu. gomezi are the probable vectors of cutaneous leishmaniasis, while Lu. evansi might transmit visceral leishmaniasis. PMID:11925994

  12. Anthropogenically induced fish diversity reduction in Lake Valencia Basin, Venezuela

    Microsoft Academic Search

    Héctor López-Rojas; Ana L. Bonilla-Rivero

    2000-01-01

    Lake Valencia in north central Venezuela, one of the largest natural inland bodies of water north of the equator, is undergoing a very rapid deterioration process as a consequence of anthropogenically induced changes. At the Ichthyology Laboratory of Instituto de Zoología Tropical, we have been studying the fishes of the northern tributaries of Lake Valencia since the early 1990's. As

  13. Crustal thickness variations in Venezuela from deep seismic observations

    NASA Astrophysics Data System (ADS)

    Schmitz, M.; Avila, J.; Bezada, M.; Vieira, E.; Yáñez, M.; Levander, A.; Zelt, C. A.; Jácome, M. I.; Magnani, M. B.; The Bolivar Active Seismic Working Group

    2008-11-01

    The Caribbean-South America plate boundary zone is a complex zone of plate interactions, forming thrust belts and foreland basins in northern Venezuela. Within the framework of the BOLIVAR and GEODINOS projects, the geodynamics of plate interactions is being investigated using interdisciplinary geological and geophysical methods. Here, we focus on the results of the land based active seismic observations done in 2004 along four deep seismic wide angle profiles, acquired perpendicular to the Caribbean-South America plate boundary in northern Venezuela between longitudes 63° W and 70° W, and ranging from about latitudes 12 °N to about 9 °N. The mostly unreversed profiles provide information on the crustal structure from the oceanic-transitional crust on the southern border of the Caribbean plate to the continental crust of the Caribbean Mountain System and their associated foreland basins, which are bordered to the south by the Guayana Shield, which corresponds to stable South America plate. The derived crustal thickness oscillates around 35 km along the coastline, corresponding to the Caribbean Mountain System, and decreases only slightly towards the Leeward Antilles. To the south, in the area of the Eastern Venezuela Basin, crustal thickness reaches 40 km, increasing towards the Guayana Shield to 45 km. Nevertheless, there are two regions of anomalous crustal thickness, proven by arrivals from the lower crust and the Moho discontinuity. In the eastern part of the Eastern Venezuela Basin, crustal thickness reaches up to 50 km, with high velocity anomalies within the lower crust, which are interpreted as reworked lower crustal and upper mantle material, associated to the plate interactions of the South American and the Caribbean plates. The second anomalous zone is a remarkable crustal thinning from 35 km to 27 km in the Falcón Basin in western Venezuela, which extends eastwards into the Bonaire Basin, as documented by PmP reflections derived from land shots, and observations of the air gun blasts on the stations of the Venezuelan seismological network.

  14. NUEVOS REGISTROS DE Guzmania (BROMELIACEAE) PARA ALGUNOS ESTADOS DE VENEZUELA New Records of Guzmania (Bromeliaceae) from some States of Venezuela

    Microsoft Academic Search

    Yuribia Vivas; Bruce Holst

    Approximately 200 species and 17 varieties of Guzmania are known from Florida to Peru. There are recognized 28 species in Venezuela, mostly epyphytics of cloudy forests, constituting an important component in the physiognomy of these vegetable formations. Based on a survey of 751 herbarium specimens of Guzmania, nine new state records (Barinas, Falcón, Lara, Portuguesa, Trujillo y Zulia) are presented

  15. Seismological Parameters in the Northern Andes, Venezuela

    NASA Astrophysics Data System (ADS)

    Sobiesiak, M.; Palme de Osechas, C.; Choy, J. E.; Morandi S., M. T.; Campo, M.; Granado Ruiz, C.

    2001-12-01

    Venezuelas tectonic setting as part of the plate boundary between the Caribbean and the South American plate causes two major seismologically active fault systems: the roughly west - east trending strike slip fault system along the coast with numerous sub-parallel faults and the Bocono fault system, which dominates the Venezuelan southwest - northeast striking Andes. The main Bocono fault reaches a total length of about 500 km and has a width of approximately 100 km between the southern and northern baseline of the mountain slopes which are marked by inverse faults. This is believed to be due to strain partitioning, a concept which seems to apply as well to the Bocono fault system. The whole fault system is characterized by a high seismicity rate of small scale and intermediate event magnitudes ranging from 1.5 to 6.3 in the last fifty years. In this study we would like to present an investigation on 39 focal mechanism solutions and a b-value mapping of the Andean region with the main goal to throw light on the stess and strain situation. For recompiling the focal memchanisms calculated from first motion polarities, various sources had to been used: seismograms from stations of the local and regional networks of the Seismological Center of ULA, the national seismic network operated by FUNVISIS, the seismic network Lago Maracaibo of PDVSA and the local seismic network of DESURCA. For the b-value mapping we used the two catalogues of ULA and DESURCA of which the last one registered more than 6500 events from 1994 to 1999. The set of focal mechanism solutions studied showed normal, strike slip, and reverse faulting mechanisms concentrated in distinct areas of the Bocono fault system and thus resulting in a zonation also supported by the determinations of the azimuths of the maximum horizontal stress SHmax. This hypothesis of the zonation of the Andes region is strongly supported by the results of the b-value mapping. The zonation as seen in the varying major stress and strain axes is also exhilbited in the spacial distribution of the b-values. Remarkable is especially a zone in the north - eastern part of the study area with a cluster of normal fault events which is congruent with the maximum b-values observed in the b-value map.

  16. Record of source-generated overpressures, Venezuela

    SciTech Connect

    Vrolijk, P.J.; Pottorf, R.J.; Maze, W.B. [Exxon Production Research Co., Houston, TX (United States)

    1996-12-31

    Fluid pressures affect migration of oil, gas, and water in continental margins. Burial and thermal history models describe the degree to which indercompaction or thermal expansion of fluids contribute to fluid pressure histories, but it is more difficult to evaluate how source-terms, such as oil yield or mineral dehydration reactions, impact paleo-fluid pressures. In this study, we document how a thick, maturing source rock helped create near-lithostatic fluid pressures that generated overpressures in reservoir rocks. We analyzed abundant oil-filled and rare aqueous fluid inclusions in calcite-filled fractures in the La Luna Fm. source rock and in the underlying Cogollo Gp. carbonate reservoir in the W. Maracaibo Basin, Venezuela. Homogenization temperatures (Th) of oil-filled inclusions range from 25-42{degrees}C in the La Luna Fm. and from 25-105{degrees}C in the Cogollo Gp., and associated gravities (determined from fluorescence properties) range from 28-43{degrees}API and 17-45{degrees}API, respectively. Integration of Th with the burial and thermal history of the sampled horizons leads to the conclusion that fractures in the La Luna Fm. formed under near-lithostatic fluid pressure conditions in the presence of a gas-charged oil. The values from fractures in the Cogollo Gp. are higher than in the La Luna Fm and become more variable with increasing depth below La Luna. We interpret those fractures to have formed under lower fluid pressure conditions and/or with a less gas-charged oil than for La Luna. This interpretation of the distribution of paleo-fluid pressures is supported by the observation of modern inverted fluid pressure gradients between upper and lower Cogollo Gp. reservoirs. Thus late expulsion of a gas-charged oil created near-lithostatic fluid pressures in the La Luna Fm. source rock, and those fluid pressures bled downward through fractures into the adjoining reservoir rocks, contributing to the overpressures we observe today.

  17. Drought, Famine, and Geographic Diversity

    NSDL National Science Digital Library

    Many Americans have heard of Ethiopia only in the context of drought, famine, and war. As they listen to the news stories, it is important for students to recognize that the media portrayals of Ethiopia are not always complete and that Ethiopia is, in fact, a geographically diverse country, including forests, grasslands, and the Blue Nile. This lesson will teach students about Ethiopia's different geographic regions. They will map the Blue Nile and Lake Tana; research and answer questions about geographical regions, climate, and agriculture of Ethiopia; research and answer questions about the current drought in Ethiopia; and write magazine articles explaining to Americans some of the things they might not have realized about Ethiopia and why it might be a good idea to learn more about the country.

  18. Analysing surnames as geographic data.

    PubMed

    Cheshire, James

    2014-01-01

    With most surname research undertaken within the fields of anthropology and population genetics, geographers have overlooked surnames as a credible data source. In addition to providing a review of recent developments in surname analysis, this paper highlights areas where geographers can make important contributions to advancing surname research, both in terms of its quality and also its applications. The review discusses the emerging applications for surname research, not least in the mining of online data, and ends by suggesting three future research themes to ensure the building momentum of surname research continues to grow across disciplines. PMID:25020015

  19. Evaluating geographic information systems technology

    USGS Publications Warehouse

    Guptill, Stephen C.

    1989-01-01

    Computerized geographic information systems (GISs) are emerging as the spatial data handling tools of choice for solving complex geographical problems. However, few guidelines exist for assisting potential users in identifying suitable hardware and software. A process to be followed in evaluating the merits of GIS technology is presented. Related standards and guidelines, software functions, hardware components, and benchmarking are discussed. By making users aware of all aspects of adopting GIS technology, they can decide if GIS is an appropriate tool for their application and, if so, which GIS should be used.

  20. National Geographic Features: Inside Tornadoes

    NSDL National Science Digital Library

    The National Geographic describes Tim Samaras and two colleagues' success in observing the bottom 30 feet of a tornado with a wisely placed camera. While users can only read the entire article by purchasing the National Geographic, the multimedia materials are amazing. Users can view images of the storm chasers at work. Everyone will enjoy the videos of the storm chasers setting up, the tornado moving over the camera, and Tim Samaras's descriptions of storm chasers' lives and tools. The website offers facts about tornadoes as well as websites and books where users can find more information.

  1. Powerful Knowledge and Geographical Education

    ERIC Educational Resources Information Center

    Roberts, Margaret

    2014-01-01

    Michael Young has argued that pupils should be given access to "powerful knowledge." This article examines the extent to which his concept of powerful knowledge is applicable to geographical education, in particular to the study of urban geography. It explores the distinction Young makes between everyday and school knowledge, how this…

  2. Geographical Agglomeration in Australian Manufacturing

    Microsoft Academic Search

    Anne Leahy; Alfons Palangkaraya; Jongsay Yong

    2007-01-01

    This paper investigates the geographic agglomeration of establishments in the Australian manufacturing industries during the period of 1994{1997. We find that although the agglomeration of Australian manufacturing has doubled during the period, it is still not as agglomerated as those in other developed economies such as the United States, the United Kingdom, France and Ireland. We also find that industries

  3. GEAR Tech-21 Geographic Coordinates

    E-print Network

    Farritor, Shane

    GEAR Tech-21 Geographic Coordinates 1 Established Goals Activity Outline Activity Timeline own coordinates. Explore latitude and longitude. Decipher degrees, minutes and seconds. Face a map and use appropriate tools and technology resources to accomplish a variety of tasks and solve problems

  4. Family Oriented Geographic Field Experience.

    ERIC Educational Resources Information Center

    Williams, Karen Ann Lalk

    This paper describes a program of geographic education through field experience trips for family groups. Developed at Delta College in Michigan, the approach is unique because it emphasizes learning experiences for families rather than for individual students. The family is interpreted to include nuclear families, single-parent families with…

  5. Population genetics of Agave cocui: evidence for low genetic diversity at the southern geographic limit of genus Agave.

    PubMed

    Figueredo, Carmen J; Nassar, Jafet M

    2011-01-01

    The Agave genus embraces many species with outstanding ecological and economic importance in the arid regions of the Americas. Even though this genus covers a broad geographic distribution, our knowledge on the population genetics of species is concentrated in taxa located in North America. Recently, it has been demonstrated that plant domestication decreases levels of genetic diversity in managed populations and increases population structure with respect to wild populations. We examined levels of allozyme diversity (N = 17 loci) and population structure of Agave cocui, the species at the southern limit of distribution of the genus. We sampled 7 wild populations (N = 30-35 individuals per population) representative of the geographic distribution of the species in Venezuela. Among the agaves studied, A. cocui has some of the lowest estimates of genetic diversity (H(e)[species] = 0.059, H(e)[population] = 0.054) reported until present. We propose that this condition is probably linked to the recent origin of this species in arid and semiarid regions of Colombia and Venezuela, probably through one or a few founder events. The lowest estimates of genetic diversity were associated with small populations in very restricted arid patches; but also with overexploitation of rosettes for production of fermented drinks and fibers. Santa Cruz de Pecaya, one of the 2 centers of economic use of agaves in northwestern Venezuela presented one of the lowest values of genetic variability, a sign suggesting that human impact represents a significant threat to the available genetic pool that this species possesses in the region. PMID:21467156

  6. Sediment distribution in El Tablazo Bay, Maracaibo system, Venezuela

    Microsoft Academic Search

    Felix E. Morales; Gonzalo Godoy

    1996-01-01

    The Bay of El Tablazo has an area about 640 km2, a trapezoidal form and average dimensions of 27 km (east-west) and 24 km (north-south) and serves as communication between the Gulf of Venezuela and the Lake of Maracaibo. It is a shallow body of water with small natural channels and an artificial main navigation canal, which is constantly dredged

  7. Use of molluscicides in the control of bilharziasis in Venezuela*

    PubMed Central

    Jove, José Antonio

    1956-01-01

    The application of molluscicides to the breeding-places of Australorbis glabratus—the intermediate host of Schistosoma mansoni in Venezuela—is discussed, with special reference to the equipment required and the techniques employed. The characteristics of the three molluscicides in use—copper sulfate, sodium pentachlorophenate, and copper pentachlorophenate—are outlined, and the treatment both of running waters (irrigation canals and streams) and of still waters (ponds and marshes) is described in detail. PMID:13356139

  8. A new species of Coespeletia (Asteraceae, Millerieae) from Venezuela

    PubMed Central

    Diazgranados, Mauricio; Morillo, Gilberto

    2013-01-01

    Abstract A new species of Coespeletia from the páramos of Mérida (Venezuela) is described here. This species, named Coespeletia palustris, is found in a few marshy areas of the páramo. It is closely related to C. moritziana, but differs from it in a smaller number of florets in the capitula, larger ray flowers with longer ligulae and longer linguiform appendages, smaller pollen grains, larger cypselae, ebracteate scapes, leaves and inflorescences with more whitish indumentum, larger leaf sheaths, and marshy habitat. PMID:24399890

  9. Radioisotope Concentration in Lake Sediments of Maracaibo, Venezuela

    SciTech Connect

    Salas, A. Rangel; Viloria, T. [La Universidad del Zulia (Venezuela); Sajo-Bohus, L.; Barros, H.; Greaves, E. D.; Palacios, D. [Universidad Simon Bolivar (Venezuela)

    2007-10-26

    Maracaibo Lake is one of the most important water basing and oil producing regions in Venezuela. Changes in the local environment have been monitored for chemical pollution in the past. For this study we selected a set of sediment samples collected in the shore and analyzed for its radioisotope content. Results show the gamma emitting isotopes distribution. Isotopes concentrations have been determined within the natural K, Th and U families.

  10. Radioisotope Concentration in Lake Sediments of Maracaibo, Venezuela

    NASA Astrophysics Data System (ADS)

    Salas, A. Rangel; Viloria, T.; Sajo-Bohus, L.; Barros, H.; Greaves, E. D.; Palacios, D.

    2007-10-01

    Maracaibo Lake is one of the most important water basing and oil producing regions in Venezuela. Changes in the local environment have been monitored for chemical pollution in the past. For this study we selected a set of sediment samples collected in the shore and analyzed for its radioisotope content. Results show the gamma emitting isotopes distribution. Isotopes concentrations have been determined within the natural K, Th and U families.

  11. A new species of Coespeletia (Asteraceae, Millerieae) from Venezuela.

    PubMed

    Diazgranados, Mauricio; Morillo, Gilberto

    2013-01-01

    A new species of Coespeletia from the páramos of Mérida (Venezuela) is described here. This species, named Coespeletia palustris, is found in a few marshy areas of the páramo. It is closely related to C. moritziana, but differs from it in a smaller number of florets in the capitula, larger ray flowers with longer ligulae and longer linguiform appendages, smaller pollen grains, larger cypselae, ebracteate scapes, leaves and inflorescences with more whitish indumentum, larger leaf sheaths, and marshy habitat. PMID:24399890

  12. An investigation of rainfall variability and distribution in Venezuela 

    E-print Network

    Gibson, Donald Reid

    1968-01-01

    Showing the Change of Monthly Precipitation Expressed as a Percentage of the Annual Total 41 APPENDIX H Series of Maps Showing the Change of Monthly Precipitation in Millimeters. . . . . . . . . . . . . 54 LIST OF FIGURES Page Figure 1. Map... of Venezuela. 2. Map of South America land forms. . . . . . . . . . . . . . . . . 3. Mean Isobars. 4. Mean Streamlines and ITCZ (Garbelll. . . 5. Change in monthly precipitation between Septem- ber and Gctober expressed as a percentage of the annual total...

  13. Two new Larainae species from Guayana region, Venezuela (Coleoptera: Elmidae).

    PubMed

    Laššová, Kristína; Ciampor, Fedor; Ciamporová-Za?ovi?ová, Zuzana

    2014-01-01

    Two new species of the subfamily Larainae (Insecta: Coleoptera: Elmidae), Hexanchorus angeli n. sp. and Hypsilara autanai n. sp., are described from Guyana region in Venezuela. We provide habitus photographs, detail drawings of both male and female genitalia, and description of morphological features important for discrimination of the new species. Molecular differences within genera were measured using 816bp fragment of mtDNA gene for cytochrome oxidase c subunit I. Sequence divergences among species are discussed. PMID:24872290

  14. A reservoir management strategy for multilayered reservoirs in eastern Venezuela

    E-print Network

    Espinel Diaz, Arnaldo Leopoldo

    1998-01-01

    , heptane plus mole percentage and oil formation volume value for black or volatile oils, retrograde gas condensate, and wet and dry gas are presented and discussed. Representative fluid samples must be analyzed in the laboratory, but "rules of thumb..., with different fluid properties, and well completion problems, the reservoir management teain faces even a more difficult challenge than normal. In this research, we have developed a reservoir management strategy for a field located in eastern Venezuela...

  15. Geologic map of the Venezuela part of the Puerto Ayacucho 2 degrees x 3 degrees Quadrangle, Amazonas Federal Territory, Venezuela

    USGS Publications Warehouse

    Wynn, Jeffrey C.; Olmore, Steven D.; Mendoza, Vicente; García, Andrés; Rendon, Ines; Estanga, Yasmin; Rincon, Haydee; Martinez, Felix; Lugo, Elis; Rivero, Nelson; Schruben, Paul G.

    1994-01-01

    This map is one of a series of 1:500,000-scale maps that, along with several other products, stems from a cooperative agreement between the U.S. Geological Survey (USGS) and the Corporacion Venezolana de Guayana, Tecnica Minera, C.A. (TECMIN), a Venezuelan Government-owned mining and mineral exploration company. The agreement covered cooperative work carried out in the Precambrian Shield of southern Venezuela during 1987-1991 and included a geologic and mineral resource inventory, technology transfer, and scientific training (Wynn and others, in press). The Precambrian Guayana Shield (Escudo de Guyana, not to be confused with the neighboring country of Guyana) includes some of the oldest known rocks in the world (Mendoza, 1977) and also covers parts of neighboring Guyana, Surinam, French Guiana, Columbia, and Brazil. In Venezuela, it underlies most of Bolivar state and all of the Amazonas Federal Territory (see index map).

  16. GIS Data Sources - Geographic Information Systems & Science

    Cancer.gov

    National Geospatial Data Clearinghouse - a searchable collection of over 250 spatial data servers containing digital geographic data primarily for use in Geographic Information Systems, image processing systems, and other modelling software.

  17. 33 CFR 166.103 - Geographic coordinates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...unless such geographic coordinates are expressly labeled NAD 83. Geographic coordinates without the NAD 83 reference may be plotted on maps or charts referenced to NAD 83 only after application of the appropriate corrections that are published on the...

  18. 33 CFR 165.8 - Geographic coordinates.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...unless such geographic coordinates are expressly labeled NAD 83. Geographic coordinates without the NAD 83 reference may be plotted on maps or charts referenced to NAD 83 only after application of the appropriate corrections that are published on the...

  19. Access to Geographic Information: Openness versus Security

    E-print Network

    Onsrud, Harlan J.

    Access to Geographic Information: Openness versus Security Professor Harlan Onsrud Department that ultimately appeared as Onsrud, H.J., 2003, Access to Geographic Information: Openness versus Security of Spatial Information Science and Engineering University of Maine Orono, Maine Onsrud

  20. Socio-Economic Aspects of National Communication Systems: III. Radio Broadcasting in Venezuela. Communication and Society, 12.

    ERIC Educational Resources Information Center

    Capriles, Oswaldo; And Others

    The third in a series that examines the role of radio broadcasting in the process of socioeconomic and cultural change in three countries with different types of broadcasting organization--Austria, Czechoslovakia, and Venezuela--this volume focuses on Venezuela. An overview of radio broadcasting in Venezuela describes various aspects and provides…

  1. National States Geographic Information Council

    NSDL National Science Digital Library

    With the exponential growth in geographic information systems (GIS) across the United States, there are a number of organizations with an interest in coordinating a variety of activities around the sustained growth and management of these various systems. One such group is the National States Geographic Information Council (NSGIC). With members drawn from the federal government, academia, and the private sector, the Council is committed to advocating on behalf of these state GIS agencies in the interest of creating efficient and accessible databases. A good place to start on their website is the â??Hot Topicsâ? area, which provides access to their blog and information about some of their latest initiatives, which include those that address homeland security and topographic accuracy. Additionally, visitors can also learn more about their events and conferences, and also about membership opportunities.

  2. Radioactive source materials in Los Estados Unidos de Venezuela

    USGS Publications Warehouse

    Wyant, Donald G.; Sharp, William N.; Rodriguez, Carlos Ponte

    1953-01-01

    This report summarizes the data available on radioactive source materials in Los Estados Unidos de Venezuela accumulated by geologists of the Direccions Tecnica de Geolgia and antecedent agencies prior to June 1951, and the writers from June to November 1951. The investigation comprised preliminary study, field examination, office studies, and the preparation of this report, in which the areas and localities examined are described in detail, the uranium potentialities of Venezuela are summarized, and recommendations are made. Preliminary study was made to select areas and rock types that were known or reported to be radioactive or that geologic experience suggests would be favorable host for uranium deposits, In the office, a study of gamma-ray well logs was started as one means of amassing general radiometric data and of rapidly scanning many of ye rocks in northern Venezuela; gamma-ray logs from about 140 representative wells were examined and their peaks of gamma intensity evaluated; in addition samples were analyzed radiometrically, and petrographically. Radiometic reconnaissance was made in the field during about 3 months of 1951, or about 12 areas, including over 100 localities in the State of Miranda, Carabobo, Yaracuy, Falcon, Lara, Trujillo, Zulia, Merida, Tachira, Bolivar, and Territory Delta Amacuro. During the course of the investigation, both in the filed and office, information was given about geology of uranium deposits, and in techniques used in prospecting and analysis. All studies and this report are designed to supplement and to strengthen the Direccion Tecnica de Geologias's program of investigation of radioactive source in Venezuela now in progress. The uranium potentialities of Los Estados de Venezuela are excellent for large, low-grade deposits of uraniferous phospahtic shales containing from 0.002 to 0.027 percent uranium; fair, for small or moderate-sized, low-grade placer deposits of thorium, rare-earth, and uranium minerals; poor, for high-grade hydrothermal pitchblende deposits; and highly possible for small, medium- to high-grade despots of carnotite-or copper-uranium bearing sandstone. Recommendations for the Venezuelan uranium program include 1) the systematic collection of a mass general radiometric data by examining sample collections, expanding the gamma-ray program, encouraging the use of Geiger counter by field geologists, and by enlisting the aid of the general public; 2) , the examination of specific areas or localities, chosen on the basis of geologic favorability from the results of the amassing of data, or obtained by hints and rumors; 3), the organization of a unit within the Direccion Tecnica de Geologica to direct, collection, and collate metric data. It is emphasized that to be most fruitful the program requires the application of sounds and imaginative geologic theory.

  3. Interruption of Onchocerca volvulus transmission in Northern Venezuela

    PubMed Central

    2013-01-01

    Background Onchocerciasis is caused by Onchocerca volvulus and transmitted by Simulium species (black flies). In the Americas, the infection has been previously described in 13 discrete regional foci distributed among six countries (Brazil, Colombia, Ecuador, Guatemala, Mexico and Venezuela) where more than 370,000 people are currently considered at risk. Since 2001, disease control in Venezuela has relied on the mass drug administration to the at-risk communities. This report provides empirical evidence of interruption of Onchocerca volvulus transmission by Simulium metallicum in 510 endemic communities from two Northern foci of Venezuela, after 10–12 years of 6-monthly Mectizan® (ivermectin) treatment to all the eligible residents. Methods In-depth entomologic and epidemiologic surveys were serially conducted from 2001–2012 in selected (sentinel and extra-sentinel) communities from the North-central (NC) and North-east (NE) onchocerciasis foci of Venezuela in order to monitor the impact of ivermectin treatment. Results From 2007–2009, entomological indicators in both foci confirmed that 0 out of 112,637 S. metallicum females examined by PCR contained L3 infection in insect heads. The upper bound of the 95% confidence intervals of the infective rate of the vector reached values below 1% by 2009 (NC) and 2012 (NE). Additionally, after 14 (NC) and 22 (NE) rounds of treatment, the seasonal transmission potential (±UL CIs) of S. metallicum was under the critical threshold of 20 L3 per person per season. Serological analysis in school children < 15 years-old demonstrated that 0 out of 6,590 individuals were harboring antibodies to Ov-16. Finally, epidemiological surveys made during 2010 (NC) and 2012 (NE) showed no evidence of microfilariae in the skin and eyes of the population. Conclusions These results meet the WHO criteria for absence of parasite transmission and disease morbidity in these endemic areas which represent 91% of the population previously at-risk in the country. Consequently, the two Northern foci are currently under post-treatment onchocerciasis surveillance status in Venezuela. PMID:24499653

  4. Geographical Applications of Remote Sensing

    SciTech Connect

    Weng, Qihao; Zhou, Yuyu; Quattrochi, Dale

    2013-11-01

    Data and Information derived through Earth observation technology have been extensively used in geographic studies, such as in the areas of natural and human environments, resources, land use and land cover, human-environment interactions, and socioeconomic issues. Land-use and land-cover change (LULCC), affecting biodiversity, climate change, watershed hydrology, and other surface processes, is one of the most important research topics in geography.

  5. GIS Database Development - Geographic Information Systems & Science

    Cancer.gov

    Geographic Extent of LI GIS This image shows a map of the geographic extent of the Long Island Geographic Information System (LI GIS). Nassau and Suffolk counties in New York - detailed data Buffer counties within 50 km - less detailed Extended area

  6. Research and Research Methods in Geographical Education.

    ERIC Educational Resources Information Center

    Graves, Norman J., Ed.

    This collection of papers examines research methods in geographical education in nine countries. "Research Methods in the History of Geographical Education" (William Marsden, the United Kingdom) examines the methods used and some of the research undertaken in the history of geographical education. "Research Methods in Investigating Children's and…

  7. Geographical Concentration The case of economics journals

    E-print Network

    Paris-Sud XI, Université de

    Geographical Concentration The case of economics journals Tove Faber Frandsen1 Royal School to the Journal Impact Factor (JIF). The results indicate that the use of a geographical concentration measure. The results show wider geographic distribution of European economics journals in the 1980s compared

  8. NATIONAL CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS

    E-print Network

    California at Santa Barbara, University of

    "basic research on geographic analysis utilizing GIS" as the Center's primary mission and suggested five NATIONAL CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS ANNUAL REPORT Year 6 (December 1, 1993 University of Maine 14 May 1995 #12; NATIONAL CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS ANNUAL REPORT

  9. Geographic names of the Antarctic

    USGS Publications Warehouse

    U.S. Board on Geographic Names; U.S. Geological Survey; Defense Mapping Agency; National Science Foundation

    1995-01-01

    This gazetteer contains 12,710 names approved by the United States Board on Geographic Names and the Secretary of the Interior for features in Antarctica and the area extending northward to the Antarctic Convergence. Included in this geographic area, the Antarctic region, are the off-lying South Shetland Islands, the South Orkney Islands, the South Sandwich Islands, South Georgia, Bouvetøya, Heard Island, and the Balleny Islands. These names have been approved for use by U.S. Government agencies. Their use by the Antarctic specialist and the public is highly recommended for the sake of accuracy and uniformity. This publication, which supersedes previous Board gazetteers or lists for the area, contains names approved as recently as December 1994. The basic name coverage of this gazetteer corresponds to that of maps at the scale of 1:250,000 or larger for coastal Antarctica, the off-lying islands, and isolated mountains and ranges of the continent. Much of the interior of Antarctica is a featureless ice plateau. That area has been mapped at a smaller scale and is nearly devoid of toponyms. All of the names are for natural features, such as mountains, glaciers, peninsulas, capes, bays, islands, and subglacial entities. The names of scientific stations have not been listed alphabetically, but they may appear in the texts of some decisions. For the names of submarine features, reference should be made to the Gazetteer of Undersea Features, 4th edition, U.S. Board on Geographic Names, 1990.

  10. Earnings and Education in Venezuela: An Update from the 1987 Household Survey.

    ERIC Educational Resources Information Center

    Psacharopoulos, George; Alam, Asad

    1991-01-01

    Uses data from Venezuela's 1987 Household Survey to update returns to education and compare them to 1975 and 1984 figures. Returns to education have been maintained despite the educational explosion occurring in Venezuela during the period investigated. Although higher education is most heavily subsidized, primary education remains the most…

  11. Using the Five Themes of Geography To Teach about Venezuela and Mexico.

    ERIC Educational Resources Information Center

    Sunal, Cynthia Szymanski; Christensen, Lois

    Activities that employ the five themes of geography--location, place, relationships within places, movement, and regions--to teach about Venezuela and Mexico are described in this document. Each theme has objectives, a list of materials, and three types of activities--exploration, invention, and expansion. Background information on Venezuela and…

  12. MARINE PALEOENVIRONMENTS OF MIOCENEPLIOCENE FORMATIONS OF NORTH-CENTRAL FALCO N STATE, VENEZUELA

    E-print Network

    Bermingham, Eldredge

    MARINE PALEOENVIRONMENTS OF MIOCENE­PLIOCENE FORMATIONS OF NORTH-CENTRAL FALCO´ N STATE, VENEZUELA Venezuela, were used in determinations of the marine paleoenvironments of the Urumaco, Codore, Caujarao, La paleoenvironments. INTRODUCTION The Cenozoic tectonic history of the northern margin of South America is complex

  13. Identificación microscópica y molecular de ehrlichias en perros del estado Aragua Venezuela

    Microsoft Academic Search

    Clara Nancy; Gutiérrez Gil; María del Carmen; Martínez Aguilera

    Microscopic and molecular identification of Ehrlicheae in dogs from Aragua-State Venezuela Bacteria of the genus Ehrlichia are obligatory intracellular microorganisms able to infect mammals, like dogs or humans. The current diagnosis method for these bacteria in Venezuela is the Buffy Coat Smear

  14. BREEDING BIOLOGY AND NATURAL HISTORY OF THE SLATE-THROATED WHITESTART IN VENEZUELA

    E-print Network

    Martin, Thomas E.

    BREEDING BIOLOGY AND NATURAL HISTORY OF THE SLATE-THROATED WHITESTART IN VENEZUELA ROMA´ N A. RUGGERA1,2,3 AND THOMAS E. MARTIN1 ABSTRACT.--We provide details on the breeding biology of the Slate is the most common race in the Andes of Venezuela, Colombia, and part of Ecuador. Genetic information for our

  15. PROCUREMENT SUPPORT TOOL FOR A BAR SOAP MANUFACTURING FACILITY IN VENEZUELA

    Microsoft Academic Search

    MIGUEL ANGEL MARCANO DIAZ

    2008-01-01

    ABSTRACT Laundry bar soap has been produced commercially in Venezuela for over a century and is one of the most important products for beauty and personal carethroughout the Venezuela. More than 10 Venezuelan companies produce and sell it, but two companies hold almost 85 percent of the market share, with the Las Llaves brand, alone, holding nearly 70 percent. Management,for

  16. Venezuela positioning itself to take key market role in wake of Gulf War

    SciTech Connect

    Not Available

    1991-08-19

    This paper reports on Venezuela which continues efforts to position itself in world markets to capitalize on fallout from the Persian Gulf war. The central government and state oil company Petroleos de Venezuela SA have accelerated already ambitious plans to expand activities in upstream and downstream oil and gas sectors. Pvdsa has sharply increased its 1991-96 investment program from the level planned at the end of last year. The goal is to put Venezuela on a par with major Persian Gulf oil exporters in terms of productive capacity. Linchpin of those efforts could well be further steps toward privatization of Venezuela's oil sector. For the first time since nationalization in 1976, private foreign and domestic companies are being permitted to participate in Venezuelan exploration and development. In addition, the government is trimming the onerous tax burden the oil sector has carried in Venezuela, as well as its heavy subsidy of domestic petroleum products.

  17. 47 CFR 27.904 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.904 Section...27.904 Geographic partitioning and spectrum disaggregation. An entity that acquires...MHz band licensee's geographic area or spectrum subject to a geographic...

  18. 47 CFR 27.805 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.805 Section...27.805 Geographic partitioning and spectrum disaggregation. An entity that acquires...GHz band licensee's geographic area or spectrum subject to a geographic...

  19. 47 CFR 27.805 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.805 Section...27.805 Geographic partitioning and spectrum disaggregation. An entity that acquires...GHz band licensee's geographic area or spectrum subject to a geographic...

  20. 47 CFR 27.904 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.904 Section...27.904 Geographic partitioning and spectrum disaggregation. An entity that acquires...MHz band licensee's geographic area or spectrum subject to a geographic...

  1. 47 CFR 27.805 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.805 Section...27.805 Geographic partitioning and spectrum disaggregation. An entity that acquires...GHz band licensee's geographic area or spectrum subject to a geographic...

  2. 47 CFR 27.904 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.904 Section...27.904 Geographic partitioning and spectrum disaggregation. An entity that acquires...MHz band licensee's geographic area or spectrum subject to a geographic...

  3. 47 CFR 27.904 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.904 Section...27.904 Geographic partitioning and spectrum disaggregation. An entity that acquires...MHz band licensee's geographic area or spectrum subject to a geographic...

  4. 47 CFR 27.805 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.805 Section...27.805 Geographic partitioning and spectrum disaggregation. An entity that acquires...GHz band licensee's geographic area or spectrum subject to a geographic...

  5. 47 CFR 27.904 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.904 Section...27.904 Geographic partitioning and spectrum disaggregation. An entity that acquires...MHz band licensee's geographic area or spectrum subject to a geographic...

  6. 47 CFR 27.805 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.805 Section...27.805 Geographic partitioning and spectrum disaggregation. An entity that acquires...GHz band licensee's geographic area or spectrum subject to a geographic...

  7. Present Status of Historical Seismicity Studies in Colombia and Venezuela

    NASA Astrophysics Data System (ADS)

    Sarabia, A.; Cifuentes, H.; Altez Ortega, R.; Palme, C.; Dimate, C.

    2013-05-01

    After the publication of the SISRA (CERESIS-1985) regional project, a unified catalog of seismic parameters and intensities for South America, researchers in historical seismicity have continued advancing on different scales in the area of this study of seismic hazard. The most important initiatives carried out in this area in Colombia and Venezuela can be grouped as follows: a) Reviews of destructive earthquakes in national and international historic archives, principally by Altez and FUNVISIS in Venezuela and Espinosa, Salcedo, and Sarabia et al in Colombia, leading to the preparation of seismologic catalogues, scientific and dissemination articles, reports, books, among others. b) Organization and systematization of historic information to develop public domain data bases and information, specifically the Historic Seismologic Teleinformation System in Venezuela, carried out between 2004 and 2008 under the coordination of Christl Palme and accessible on-line: http://sismicidad.ciens.ula.ve. As well, the "Historia Sísmica de Colombia 1550-1830" (Seismic History in Colombia 1550-1830) data base, in CD-ROM, by Espinosa Baquero (2003) and the historic seismicity information system of Colombia (Servicio Geológico Colombiano-Universidad Nacional de Colombia), published on the internet in 2012: http://agata.ingeominas.gov.co:9090/SismicidadHistorica/. c) Macroseismic studies for the development of intensity attenuation equations and the quantification and revaluation of basic historic earthquake parameters using isoseismal maps (Rengifo et al., Palme et al., Salcedo et al., among others) and procedures such as Boxer and Bakun & Wentworth (Palme et al., Dimaté, among others), which have produced significant changes in the parameters of some of the large earthquakes. d) Symposiums of researchers to promote interest and development in the discipline, including Jornadas Venezolanas de Sismología Histórica (Venezuelan Congress of Historical Seismology), held periodically between 1997 and 2012, the year of the sixth edition. As well, national and international research groups have been formed to work actively on global projects, such as the Geophysics Laboratory of Universidad de Los Andes in Venezuela. In the future, international groups will be formed to jointly treat issues including localization and size of destructive events along borders, common scales for the evaluation of intensities, integrated data bases, etc. Additionally the methods employed will be validated by paleoseismology, neotectonics and instrumental seismicity, among others.

  8. [Interpopulation reproductive synchrony of Agave cocui (Agavaceae) in Venezuela].

    PubMed

    Figueredo, Carmen J; Villegas, José Luis; Nassar, Jafet M

    2011-09-01

    Agave cocui (Agavaceae) is a species with broad distribution in arid and semiarid areas of Venezuela and Colombia. Despite of its ecological importance as a source of food for wildlife, and its economic value for production of a spirit drink, studies on the reproductive ecology of the species are relatively rare. In this study, we conducted a one-year evaluation of the flowering and fruiting phenology of A. cocui in the eight representative localities of the species' distribution in Venezuela. Within each study site, we chose an area with a minimum of 50 reproductive individuals and followed their reproductive phenophases with the help of binoculars, using six qualitative cathegories (emerging reproductive stalk, flowers, inmature fruits, mature fruits, bulbils and dry stalk) every two months. Emergence of the reproductive stalk in most of the examined populations began in September (rainy season), although this event delayed two months in a few populations. We detected significant negative correlations between precipitation and the percentage of flowering occurrence in four of the eight populations. Floral resources are available for flower visitors during approximately five months of the year (January-May). In most populations production of flowers initiated in January (dry season), and for Western Venezuela and Andean regions, the flowering main peak occurred in January. Localities from the Central and Eastern Coast exhibited the flowering peak in March, showing a delay of approximately two months with respect to other populations. Beginning of fruit set varied among localities from January to May; however, peak production of mature fruits concentrated in May, and fruit occurrence varied broadly between 5.2 and 85%. Bulbil production was detected in all populations and varied greatly among them (maximum percentage per population: 26.19-92.10%). High flowering synchronicity (Phenophase Overlapping Index: 0.756 and 0.999) was observed among all populations monitored in Western Venezuela, including the Andean localities. This condition might facilitate the existence of a nectar corridor from the Western Coast and nearby islands, to the Andean arid patches, which could be potentially used by nectar-feeding bats and birds dependent on agave flowers during part of the year. PMID:22017138

  9. A new baseline for fascioliasis in Venezuela: lymnaeid vectors ascertained by DNA sequencing and analysis of their relationships with human and animal infection

    PubMed Central

    2011-01-01

    Background Human and animal fascioliasis poses serious public health problems in South America. In Venezuela, livestock infection represents an important veterinary problem whereas there appear to be few human cases reported, most of which are passively detected in health centres. However, results of recent surveys suggest that the situation may be underestimated in particular areas. To obtain a baseline for future fascioliasis assessment, studies were undertaken by means of rDNA ITS-2 and ITS-1 and mtDNA cox1 sequencing to clarify the specific status of Venezuelan lymnaeids, their geographical distribution and fascioliasis transmission capacity, by comparison with other American countries and other continents. Results Results obtained completely change the lymnaeid scenario known so far. The relatively rich lymnaeid fauna of Venezuela has been proven to include (i) Lymnaea meridensis and L. neotropica as the only native members, (ii) L. cubensis and Pseudosuccinea columella introduced from the Caribbean area, and (iii) Galba truncatula and L. schirazensis introduced from the Old World. The absence of representatives of the stagnicoline and Radix groups is remarkable. Four species are fascioliasis vectors: G. truncatula, L. cubensis and L. neotropica, which have the capacity to give rise to human endemic areas, and P. columella, which is a source of animal infection and is responsible for the spread of disease. Vector capacity in the apparently highland endemic L. meridensis is to be confimed, although may be expected given its phylogenetic relationships. Similarly as elsewhere, the non-transmitting L. schirazensis has been confused with L. cubensis, also with G. truncatula and possibly with L. neotropica. Conclusions The new scenario leads to the re-opening of many disease aspects. In Venezuela, altitude appears to be the main factor influencing fascioliasis distribution. Human infection shows an altitude pattern similar to other Andean countries, although a differing highland/lowland impact on animal infection does not appear evident. The overlap of G. truncatula, L. cubensis and probably also L. neotropica in temperate and cold zones suggests a higher risk for human infection in mid and high altitude areas. A lymnaeid species mapping by means of DNA markers becomes a priority to determine human and animal fascioliasis distribution in Venezuela, owing to the importance of lymnaeid vectors in defining transmission and epidemiological patterns. PMID:21999170

  10. Genetic characterization of rabies field isolates from Venezuela.

    PubMed

    de Mattos, C A; de Mattos, C C; Smith, J S; Miller, E T; Papo, S; Utrera, A; Osburn, B I

    1996-06-01

    Twenty samples from cases of rabies in humans and domestic animals diagnosed in Venezuela between 1990 and 1994 and one sample from a vampire bat collected in 1976 were characterized by reactivity to monoclonal antibodies against the viral nucleoprotein and by patterns of nucleotide substitution in the nucleoprotein gene. Three antigenic variants were found: 1, 3, and 5. Antigenic variant 1 included all samples from dogs and humans infected by contact with rabid dogs. Unique substitutions permitted identification of two separate outbreaks of dog rabies in the Maracaibo Depression and Los Llanos region and in the Andean region of Venezuela. Samples from the vampire bat and two head of cattle were characterized as antigenic variant 3 and showed a nucleotide sequence homology of 96 to 98% to each other and to samples of vampire bat-associated rabies throughout Latin America. Ten of the remaining 12 samples were characterized as antigenic variant 5. Genetic studies indicated that 11 of these samples formed a highly homologous and distinctive group but were closely related to samples of vampire bat-associated rabies. The 12th sample of variant 5 (from a cat) showed only 78 to 80% genetic homology to samples of rabies associated with vampire bats. The application of antigenic and genetic typing to rabies surveillance in Latin America is essential to improve control programs. Recognition of the source of outbreaks of dog rabies and identification of wildlife species maintaining sylvatic cycles of rabies transmission permit better utilization of public health resources. PMID:8735118

  11. Raptor abundance and distribution in the Llanos wetlands of Venezuela

    USGS Publications Warehouse

    Jensen, W.J.; Gregory, M.S.; Baldassarre, G.A.; Vilella, F.J.; Bildstein, K.L.

    2005-01-01

    The Llanos of Venezuela is a 275 000-km2 freshwater wetland long recognized as an important habitat for waterbirds. However, little information exists on the raptor community of the region. We conducted raptor surveys in the Southwestern and Western Llanos during 2000-02 and detected 28 species representing 19 genera. Overall, areas of the Llanos that we sampled contained 52% of all raptor species and more than 70% of the kites, buteos, and subbuteos known to inhabit Venezuela. Regional differences in the mean number per route for four of the 14 most common species, the Crested Caracara (Caracara plancus), Black-collared Hawk (Busarellus nigricollis), American Kestrel (Falco sparverius), and Osprey (Pandion haliaetus), were significant (P < 0.0018) in relation to the wet or dry seasons. Of the 14 less common species, six were detected in only one season (wet or dry). The Southwestern and Western regions of the Llanos support a rich raptor community composed primarily of nonmigratory wetland-dependent and upland-terrestrial species. ?? 2005 The Raptor Research Foundation, Inc.

  12. Geographic Information Retrieval for Just Your Surroundings

    NASA Astrophysics Data System (ADS)

    Yasuda, Norihito; Toda, Hiroyuki

    Geographic information retrieval (GIR) is a new research area that aims at the retrieval of geographic-related documents based not only on keyword relevance but also on geographic relationships between the query and the geographic information in texts. It is natural for people to want information related to just their surroundings. Conventional GIR systems, however, have relatively poor granularity, such as city or province, because they use geographic information in restricted ways -- mostly just for filtering. To address this problem, we propose a geographic scoring method that considers extent implied by each geographic names appeared in texts to emphasize geographic names that focus specific areas, rather than broad geographic names. Furthermore, to improve robustness against errors in pre-processing such as geo-parsing and geo-coding, we also propose a noise elimination method based on clustering. Evaluation is conducted using standard TREC-style evaluation metrics including MAP, R-precision, and so on. The results show that our method outperforms two baseline approaches: full-text search and using the nearest point in the text.

  13. National Geographic: Prehistoric Time Line

    NSDL National Science Digital Library

    Humans haven't roamed the earth for long, and our presence on this planet only dates back around 190,000 years. There are approximately 4.3 billion more years of Earth's history to explore, and this interactive and edifying timeline created by National Geographic helps interested persons explore it. First-time visitors can click around within the timeline to read short descriptions of important events and developments in the Earth's history, complete with visual materials. The events covered here include the initial formation of the Earth all the way up to the recent Ice Ages and the birth of modern humans. Along with this timeline, visitors can also view a photo gallery of the Permian Age and learn more about mass extinctions.

  14. A Descriptive Chronology of Films by Women in Venezuela, 1952-92.

    ERIC Educational Resources Information Center

    Schwartzman, Karen

    1993-01-01

    Offers an annotated chronology of Venezuelan films, representing a first step toward a general history of women's filmmaking in Venezuela. Suggests that the participation of women directors closely follows the curve of national film production in general. (RS)

  15. Decentralization and Regionalization in the Ministry of Education: The Case of Venezuela

    ERIC Educational Resources Information Center

    Hanson, Mark

    1976-01-01

    This research is an effort to analyze the process of organizational change as it takes place within one segment of the public administration mechanism in Venezuela--The Ministry of Education. (Editor/RK)

  16. Correlation of the Jurassic through Oligocene Stratigraphic Units of Trinidad and Northeastern Venezuela

    SciTech Connect

    Algar, S. [Enterprise Oil, London (United Kingdom); Erikson, J.P. [Univ. of California, Davis, CA (United States)

    1995-04-01

    The Jurassic through Oligocene stratigraphies of Trinidad and the Serrenia del Interior of eastern Venezuela exhibit many similarities because of their proximity on the passive continental margins of northeastern South America. A slightly later subsidence in eastern Venezuela, and the generally deeper-water sedimentation in Trinidad, is interpreted to be the result of a serration of the original rift margin, producing an eastern Venezuela promontory and Trinidadian re-entrant. We interpret these serrations to be the result of oblique (NW-SE) spreading of North and South America during Middle and late Jurassic time. The stratigraphies of northeastern Venezuela and Trinidad contrast in the Hauterivan-Albian interval, with dynamic shallow shelf environments prevailing in the Serrenia del Interior and deeper marine submarine-fan deposition in Trinidad. Both areas develop middle to Upper Cretaceous source rocks during a time of eustatic sea level high and widespread oceanic anoxia. 15 refs., 4 fig.

  17. Biological and phylogenetic characterization of a genotype VII Newcastle disease virus from Venezuela: Efficacy of vaccination

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Here we describe the characterization a virulent genotype VII Newcastle disease virus (NDV) from Venezuela and evaluate the efficacy of heterologous genotype commercial vaccination under field and controlled rearing conditions. Biological pathotyping and molecular analysis were applied. Results sh...

  18. Ecology of the river dolphin, Inia geoffrensis, in the Cinaruco River, Venezuela 

    E-print Network

    McGuire, Tamara Lee

    1995-01-01

    The Cinaruco River is a tributary of the Orinoco River, and forms the southern boundary of Venezuela's newest national park, Santos Luzardo. Like other rivers of this region, the Cinaruco River undergoes an extreme seasonal ...

  19. Identification and characterization of Hydraulic Flow Units in the San Juan Formation, Orocual Field, Venezuela 

    E-print Network

    Deghirmandjian, Odilia

    2001-01-01

    This thesis focuses on the integration of core and well log data in order to provide a petrophysical characterization of the Hydraulic Flow Units (HFU) in the San Juan Formation, Orocual Field, Venezuela. We used three separate approaches...

  20. REQUIREMENTS FOR MODERN GEOGRAPHIC INFORMATION SYSTEMS

    Microsoft Academic Search

    Christian Heipke

    In this paper we describe some requirements which an ideal geographic information system (GIS) must meet to cope with the challenges of the future. We look at data modelling, the integration of geographic information science and photogrammetry, update and refinement of a geospatial database, and data integration. We claim that data modelling needs to be carried out in 3D based

  1. Embarking on Collaborative Research in Geographic Education

    ERIC Educational Resources Information Center

    Alexson, Randy Gabrys; Kemnitz, Christopher; Bell, Scott; Hardwick, Susan

    2005-01-01

    This paper provides insights into the complexities and rewards involved in conducting a collaborative research project in geographic education. Using a case study from the National Council for Geographic Education's ongoing EMBARC Project ("Encouraging our Members to Belong to a Research Community"), the authors document and analyse their ongoing…

  2. Geographical Mobility Patterns of College Coaches

    ERIC Educational Resources Information Center

    Sage, George H.; Loy, John W.

    1978-01-01

    The major objectives of this study were to compare coaches with respect to: (1) geographical origins; (2) migration from hometown to college; (3) diffusion from undergraduate college to first coaching position; and (4) geographical movement from first coaching position to present coaching position. (Author/AM)

  3. NATIONAL CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS

    E-print Network

    California at Santa Barbara, University of

    and suggested five areas as possible research topics: improved methods of spatial analysis and advancesNATIONAL CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS ANNUAL REPORT Year 4 (December 1, 1991 University of Maine February 28, 1993 #12;NATIONAL CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS ANNUAL

  4. Graduate Certificate in Geographic Information Systems (GIS)

    E-print Network

    Graduate Certificate in Geographic Information Systems (GIS) Texas A&M University GIS technologies 651/BAEN 651 ­ Geographic Information Systems · GEOG 660 ­ Applications for GIS Intermediate Level (Both are required) 6 hours · ESSM 652/BAEN 652 ­ Advanced Topics in GIS · GEOG 665 ­ GIS ­ based

  5. An Evolutionary Algorithm for the Selection of Geographically Informative Species

    Microsoft Academic Search

    Daniel Ashlock; Karl Cottenie; Lindsey Carson; Kenneth Mark Bryden; Steven M. Corns

    2006-01-01

    The geographic distribution of species is of interest in making conservation plans, designating biosphere reserves, and in un- derstanding the different range sizes of species. In this paper, an evolutionary algorithm is used to classify species of fresh- water crustacean zooplankton as geographically informative or geographically non-informative. Geographically non-informative species tend to have a broad distribution, while geographically in- formative

  6. Geographic Determinants of Chinese Urbanization

    NASA Astrophysics Data System (ADS)

    Mccord, G. C.; Christensen, P.

    2011-12-01

    In the first years of the 21st century, the human race became primarily urban for the first time in history. With countries like India and China rapidly undergoing structural change from rural agricultural-based economies to urbanized manufacturing- and service-based economies, knowing where the coming waves of urbanization will occur would be of interest for infrastructure planning and for modeling consequences for ecological systems. We employ spatial econometric methods (geographically weighted regression, spatial lag models, and spatial errors models) to estimate two determinants of urbanization in China. The first is the role of physical geography, measured as topography-adjusted distance to major ports and suitability of land for agriculture. The second is the spatial agglomeration effect, which we estimate with a spatial lag model. We find that Chinese urbanization between 1990 and 2000 exhibited important spatial agglomeration effects, as well as significant explanatory power of nearby agricultural suitability and distance to ports, both in a nationwide model and in a model of local regression estimates. These results can help predict the location of new Chinese urbanization, and imply that climate change-induced changes in agricultural potential can affect the spatial distribution of urban areas.

  7. Embodying racism: race, rhinoplasty, and self-esteem in Venezuela.

    PubMed

    Gulbas, Lauren E

    2013-03-01

    In this article, I examine how race motivates women's decisions to undergo aesthetic rhinoplasty in Caracas, Venezuela. Through a combination of cultural domain analysis and thematic analysis of qualitative interviews, I explore how the preference for whiteness and associated facial features dovetail with the aesthetic ideals promoted by cosmetic surgeons. Rhinoplasty is offered by physicians and interpreted by patients as a resolution to body dissatisfaction and low self-esteem. The clinical ethos of objectivity established by cosmetic surgeons fails to acknowledge how perceptions of the self and body are strongly tied to racial marginalization: patients' efforts to alter the nose reveal attempts to change not only how the body looks, but how it is lived. As a result, cosmetic surgery only acts as a stop-gap measure to heighten one's self-esteem and body image. PMID:23349127

  8. Postepizootic persistence of Venezuelan equine encephalitis virus, Venezuela.

    PubMed

    Navarro, Juan-Carlos; Medina, Gladys; Vasquez, Clovis; Coffey, Lark L; Wang, Eryu; Suárez, Alexander; Biord, Hernán; Salas, Marlene; Weaver, Scott C

    2005-12-01

    Five years after the apparent end of the major 1995 Venezuelan equine encephalitis (VEE) epizootic/epidemic, focal outbreaks of equine encephalitis occurred in Carabobo and Barinas States of western Venezuela. Virus isolates from horses in each location were nearly identical in sequence to 1995 isolates, which suggests natural persistence of subtype IC VEE virus (VEEV) strains in a genetically stable mode. Serologic evidence indicated that additional outbreaks occurred in Barinas State in 2003. Field studies identified known Culex (Melanoconion) spp. vectors and reservoir hosts of enzootic VEEV but a dearth of typical epidemic vectors. Cattle serosurveys indicated the recent circulation of enzootic VEEV strains, and possibly of epizootic strains. Persistence of VEEV subtype IC strains and infection of horses at the end of the rainy season suggest the possibility of an alternative, cryptic transmission cycle involving survival through the dry season of infected vectors or persistently infected vertebrates. PMID:16485478

  9. Potential for Great Thrust Earthquakes in NE Colombia & NW Venezuela

    NASA Astrophysics Data System (ADS)

    Bilham, R. G.; Mencin, D.

    2013-05-01

    Sixty-five percent of the ?19 mm/yr eastward velocity of the Caribbean Plate north of Aruba and the Guajira peninsula relative to the South American plate is accommodated by dextral slip on the Bocono Fault system in NW Venezuela at 12±1 mm/yr, the remaining ~3 mm/yr of shear apparently distributed to the NW of the fault (Perez et al., 2011). The N40E strike of the Bocono fault system, however, requires that 10.6±1 mm/yr of convergence should accompany this partitioned dextral shear, but GPS measurements reveal that less than 25% of this convergence occurs across the Venezuelan Andes. The remaining 6-8 mm of convergence is presumably accommodated by incipient subduction between the Bocono fault and a trench 300 km NW of the northern coast of Colombia. Hence NW Venezuela and NE Colombia may occasionally host great earthquakes. Our current poor understanding of the geometry of the plate interface permits the plate to be locked 300 km down-dip and possibly 600 km along-strike, and if the plate slips in 10 m ruptures it could do so every 1200 years in a M~9 earthquake. No great earthquake has occurred since 1492, since when ~4 m of potential slip has developed, but should slip occur on just 10% of the hypothesized décollement (100x150 km) it could do so now in an Mw=8.2 earthquake. In that a potential Mw>8 earthquake poses a future seismic and tsunami threat to the Caribbean it is important to examine whether great earthquakes have occurred previously near the NW Venezuela coast. It is possible that creep accommodates the entire convergence signal, since there is no suggestion from microseismicity for an abrupt locked-to-sliding transition, as, for example, signifies its location in the Himalaya. An alternative measure of future potential seismic energy release is to identify the locus and rate of present-day strain contraction. To this end, Venezuelan, Colombian and US (CU and UNAVCO) investigators are installing an array of more than a dozen continuous operating GPS sites in the region. Studies of tsunami deposits on the Dutch Antilles suggest that the provenance of paleotsunami responsible for moving 10-100 ton blocks of coral onshore in the past two millennia has been from the east (Sheffers, 2002), and not from the north or south as we might expect from a NW Venezuelan earthquake. The existence of precariously balanced rocks in the region provides an alternative constraint on the occurrence of large local accelerations. The survival of at least four precariously balanced megablocks on the island of Aruba suggests that horizontal accelerations here have not exceeded 1 g for the past several millennia, but refined numerical estimates of potential shaking intensity consistent with their survival have yet to be completed. Accelerations exceeded 2.5 g in the Tohuko 2011 earthquake but above the Mexican subduction zone, accelerations have typically not exceeded 0.5 g in recent Mw~7.5 earthquakes, and hence the existence of these blocks may not exclude the historical occurrence of damaging earthquakes. A broader search for surviving strong-motion indicators in Colombia and Venezuela is planned during the installation of the GPS array.

  10. Overcoming Squeezing in the Yacambú-Quibor Tunnel, Venezuela

    NASA Astrophysics Data System (ADS)

    Hoek, E.; Guevara, R.

    2009-04-01

    The 5 m diameter 23.3 km long Yacambú-Quibor tunnel is designed to carry water through the Andes from the Yacambú dam in the wet tropical Orinoco basin to the semi-arid but fertile Quibor basin in western Venezuela. The tunnel is excavated in silicified and graphitic phyllites at depths of up to 1270 m below surface and extreme squeezing problems have been encountered. Construction involved 8 contracts extending over 32 years with breakthrough being achieved in July 2008. Several excavation methods and various lining designs were used over the years until the adoption of yielding support permitted the Owner and the Contractor to agree that only a circular section would be used and emphasis was placed on developing a routine construction procedure, irrespective of the rock conditions encountered at the face. This paper describes some of the rock engineering issues that were faced during the construction of this tunnel.

  11. A preliminary analysis of geographic variation in the neotropical teiid lizard, Cnemidophorus lemniscatus (Sauria: Teiidae), from Mainland Central and South America 

    E-print Network

    McCrystal, Hugh Kreyer

    1984-01-01

    localities together. The samples were taken throughout most of the known range of the mainland population of C. lemniscatus, north of the Bio Amazonas, Brazil, with particular emphasis on Colombia and Venezuela. Specimens from the Amazon Basin were... = Puerto Cortes, Honduras; g4 = Surinam; T";5 = i~laturin, Venezuela; 66 Falcon, Venezuela; g7 = Bolivar, Venezuela; g8 = Camatagua, Venezuela; P9 = Guyana; $1G Baranquilla, Colombia; $11 = Yaviza, Panama; 514 = Apure, Venezuela; f16 = Villavicencio...

  12. 47 CFR 95.823 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... false Geographic partitioning and spectrum disaggregation. 95.823 Section...95.823 Geographic partitioning and spectrum disaggregation. (a) Eligibility...approval of geographic partitioning or spectrum disaggregation of 218-219 MHz...

  13. 47 CFR 95.823 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... false Geographic partitioning and spectrum disaggregation. 95.823 Section...95.823 Geographic partitioning and spectrum disaggregation. (a) Eligibility...approval of geographic partitioning or spectrum disaggregation of 218-219 MHz...

  14. 47 CFR 95.823 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... false Geographic partitioning and spectrum disaggregation. 95.823 Section...95.823 Geographic partitioning and spectrum disaggregation. (a) Eligibility...approval of geographic partitioning or spectrum disaggregation of 218-219 MHz...

  15. 47 CFR 95.823 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... false Geographic partitioning and spectrum disaggregation. 95.823 Section...95.823 Geographic partitioning and spectrum disaggregation. (a) Eligibility...approval of geographic partitioning or spectrum disaggregation of 218-219 MHz...

  16. 47 CFR 95.823 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... false Geographic partitioning and spectrum disaggregation. 95.823 Section...95.823 Geographic partitioning and spectrum disaggregation. (a) Eligibility...approval of geographic partitioning or spectrum disaggregation of 218-219 MHz...

  17. Low Child Survival Index in a Multi-Dimensionally Poor Amerindian Population in Venezuela

    PubMed Central

    Villalba, Julian A.; Liu, Yushi; Alvarez, Mauyuri K.; Calderon, Luisana; Canache, Merari; Cardenas, Gaudymar; Del Nogal, Berenice; Takiff, Howard E.; De Waard, Jacobus H.

    2013-01-01

    Background Warao Amerindians, who inhabit the Orinoco Delta, are the second largest indigenous group in Venezuela.  High Warao general mortality rates were mentioned in a limited study 21 years ago. However, there have been no comprehensive studies addressing child survival across the entire population. Objectives To determine the Child Survival-Index (CSI) (ratio: still-living children/total-live births) in the Warao population, the principal causes of childhood death and the socio-demographic factors associated with childhood deaths. Methods We conducted a cross-sectional epidemiological survey of 688 women from 97 communities in 7 different subregions of the Orinoco Delta. Data collected included socio-demographic characteristics and the reproductive history of each woman surveyed. The multidimensional poverty index (MPI) was used to classify the households as deprived across the three dimensions of the Human Development Index. Multivariable linear regression and Generalized Linear Model Procedures were used to identify socioeconomic and environmental characteristics statistically associated with the CSI. Findings The average CSI was 73.8% ±26. The two most common causes of death were gastroenteritis/diarrhea (63%) and acute respiratory tract Infection/pneumonia (18%).  Deaths in children under five years accounted for 97.3% of childhood deaths, with 54% occurring in the neonatal period or first year of life.  Most of the women (95.5%) were classified as multidimensionally poor.  The general MPI in the sample was 0.56.   CSI was negatively correlated with MPI, maternal age, residence in a traditional dwelling and profession of the head of household other than nurse or teacher. Conclusions The Warao have a low CSI which is correlated with MPI and maternal age.  Infectious diseases are responsible for 85% of childhood deaths.  The low socioeconomic development, lack of infrastructure and geographic and cultural isolation suggest that an integrated approach is urgently needed to improve the child survival and overall health of the Warao Amerindians.  PMID:24392022

  18. 38 CFR 36.4214 - Geographical limits.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...DEPARTMENT OF VETERANS AFFAIRS (CONTINUED) LOAN GUARANTY Guaranty of Loans to Veterans to Purchase Manufactured Homes and Lots, Including Site Preparation General Provisions § 36.4214 Geographical limits. The site for any...

  19. 38 CFR 36.4214 - Geographical limits.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...DEPARTMENT OF VETERANS AFFAIRS (CONTINUED) LOAN GUARANTY Guaranty of Loans to Veterans to Purchase Manufactured Homes and Lots, Including Site Preparation General Provisions § 36.4214 Geographical limits. The site for any...

  20. Placing Innovation: A Geographic Information Systems

    E-print Network

    Placing Innovation: A Geographic Information Systems (GIS) Approach to Identifying EmergentUnderstanding Regional Innovative CapacityInnovative Capacity May 2007 #12;About ATP's Economic Assessment Office supported projects) · Outcomes (innovation in products, processes, and services from ATP supported projects

  1. Glenda Romn Geographic Mapping Technologies, Corp.

    E-print Network

    Gilbes, Fernando

    Seismic Hazards Indonesia Soil Moisture Michigan Geologic Analysis Madagascar Landslide Susceptibility El Geográfica utilizando visualizadores gratuitos ArcGIS Explorer #12;Geographic Mapping Technologies, Corp · 14 años - Firma privada de consultoría de GIS · Distribuidores exclusivos de ESRI · Proveemos apoyo

  2. Geographic Information Systems & Science Tools & Data

    Cancer.gov

    This section provides links to data sources, describes tools developed by the National Cancer Institute (NCI) for the analysis and visualization of geographic data, and directs users to other GIS tools and applications.

  3. BachelorofScience ComputerScienceandGeographical

    E-print Network

    Seldin, Jonathan P.

    - Introduction to Human Geography _____ Geography 2700 - Geographical Data and Analysis _____ Geography 2735 - GIS Applications in Human Geography ___ Geography 4730 - Spatial Statistics ___2 Statistics 2780 Planning Guides: www.uleth.ca/ross/ppgs Departments: Geography, and Mathematics and Computer Science #12

  4. Why geography? Geographers study the earth's landscapes,

    E-print Network

    Sussex, University of

    and the interactions between them. Geography bridges the social sciences (human geography) and natural sciencesWhy geography? Geographers study the earth's landscapes, people and environment (physical geography). It is concerned with understanding the interactions between natural processes

  5. Overview of Geographic Information Systems & Science

    Cancer.gov

    A geographic information system (GIS) consists of an integrated hardware, software, and data system that can capture, manage, analyze, and visualize diverse types of geographical information. GIS systems enable researchers to examine data in unique ways so that they can more readily observe and interpret relationships, patterns, and trends in complicated data sets. The National Cancer Institute (NCI) is engaged in a variety of GIS-related activities and initiatives.

  6. Remote sensing and geographically based information systems

    NASA Technical Reports Server (NTRS)

    Cicone, R. C.

    1977-01-01

    A structure is proposed for a geographically-oriented computer-based information system applicable to the analysis of remote sensing digital data. The structure, intended to answer a wide variety of user needs, would permit multiple views of the data, provide independent management of data security, quality and integrity, and rely on automatic data filing. Problems in geographically-oriented data systems, including those related to line encoding and cell encoding, are considered.

  7. Teaching Geographic Concepts Through Fieldwork and Competition

    Microsoft Academic Search

    Joseph P. Hupy

    2011-01-01

    This article describes the benefits of combining field-based learning within the context of a competitive setting in the geography curriculum. Findings and data are presented based on experiences gathered from teaching an upper-level university geography course that combined geographic techniques and theory into a game of capture-the-flag. Students analyzed a variety of geospatial data sources, using ArcMap Geographic Information System

  8. Ciudadanos sin polis: democracia dual, antipolítica y sociedad civil en Venezuela Citizens without polis: dual democracy, anti-politics and civil society in Venezuela

    Microsoft Academic Search

    Colette Capriles

    In the political game taking place amidst the debris of puntofijismo (name given to the system of represen- tative democracy developed between 1958 and 1998 in Venezuela), a significant place is occupied by myths intended to explain the rise and fall of the political coordinates of the period. Among such myths, one na- rrative stands out: a certain 'epiphany of

  9. Cross sector partnership results in increased marine biodiversity information, awareness, and an initial biodiversity action plan in the Gulf of Paria, Venezuela

    Microsoft Academic Search

    F. D. Rodriguez; A. S. Carter; A. D. Rawa

    2005-01-01

    This paper describes how a pro-active cross sector partnership between organizations has successfully contributed to a better understanding of marine biodiversity and consensus among stakeholders on conservation priorities in the Gulf of Paria, Venezuela. ConocoPhillips Venezuela and its partners discovered offshore oil resources in the Gulf of Paria, northeastern Venezuela in 1999, and have since been making progress on their

  10. Structural Model of the Tucupita Field, Eastern Venezuela Basin

    NASA Astrophysics Data System (ADS)

    Arteaga, L. A.

    2013-05-01

    The Tucupita Field has an area of 73,51 Km2, is located between the states of Monagas and Delta Amacuro, geologically is located at the greater Temblador area in the Eastern Venezuela Basin, where the Oficina Formation's sands represent the main hydrocarbons reservoirs. From the results of the seismic reprocessing realized by Fusion Petroleum Technologies, Inc., the structural model of this field was done as initial step to the geocellular model of the Oficina-40 Reservoir, which was defined as a Faulted Relay Ramp, where the normal faults are dominant with NE-SW orientation Introduction The Tucupita Field is a mature oilfield at the greater Temblador area, however most of the wells were completed in the upper sands, therefore the main study is focused in the geological characterization of the Oficina-40 Reservoir's lower sands, starting by the structural model Previous Studies 1. Proyecto Tucupita 3D The seismic data of the Tucupita Field were adquired in 1996 by Western Atlas of Venezuela for the Benton Vinccler Company. The UTM coordinates of the wells used in this project, have been taken to make this geological model 2. Soporte Geofísico Integrado The seismic project Tucupita was processed by Fusion Petroleum Technologies Inc., in Houston and consisted of reprocessing and pre-stack migration in time (PSTM) and pre-stack migration in depth (PSDM), this data belong to the Petrodelta Company Based on the regional stratigraphy, were validated the "picks" to make the structural sections to support research with hard data. After, it proceeded to interpret the structural style of the field from the seismic amplitude cube. Then, it was done the faults modelling and the stratigraphic horizons to carry out the geocellular model Three structural sections were realized, which was interpreted like a faulted monocline, whose peak is located southward, where justly the wells are located. The contact oil-water was interpreted to -5648'. Echelon faults were interpreted in a structure of the Faulted Relay Ramp (Figure 1), defined by two normal faults with orientation NE-SW, including the main fault of Tucupita Field Conclusions 1. The development of this structural model led to geological characterization of the Oficina-40 Reservoir, integrating this interpretation in a geocellular model to calculate the STOIIP.The Tucupita Field is characterized structurally as a Faulted Relay Ramp References 1. Fusion Petroleum Technologies, Inc. 2009. PROYECTO TUCUPITA SOPORTE GEOFÍSICO INTEGRADO; Figure 1. Faulted Relay Ramp, Tucupita Field

  11. Mapa Geologico de Venezuela a Escala 1:750,000

    USGS Publications Warehouse

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

    2006-01-01

    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.

  12. PATÓGENOS DEL SUELO EN EL CULTIVO DE PIMENTÓN EN LA ZONA BAJA DEL MUNICIPIO JIMÉNEZ, ESTADO LARA, VENEZUELA

    Microsoft Academic Search

    Yoleidy Escalona; Dorian Rodríguez; Nancy Contreras; Nixon Jiménez

    2006-01-01

    Soil pathogens in bell pepper grown at the low basin of the Jimenez county of Lara State, Venezuela Bell pepper (Capsicum annuum L.) is the fourth most cultivated vegetable in Venezuela. It is affected by several diseases being, the most important those caused by soil pathogens, such as wilt, yellowing and\\/or poor development, which are found in the basin of

  13. Impacto de la luz artificial sobre la anidación de la tortuga marina Dermochelys coriacea (Testudines: Dermochelyidae), en playa Cipara, Venezuela

    Microsoft Academic Search

    María Rondón Médicci; Joaquín Buitrago; Michael Mccoy

    Impact of artificial light on nesting in the leatherback turtle Dermochelys coriacea (Testudines: Dermochelyidae) at Cipara beach, Venezuela. The number of Leatherback turtle nests and their spatial dis- tribution was compared between years with and without artificial light, and between dark and lighted beach segments, in Cipara Beach, Paria Peninsula, Venezuela. Residents were interviewed to identify their perceptions about the

  14. Caribbean basin framework, 4: Maracaibo basin, northwestern Venezuela

    SciTech Connect

    Lugo, J. (Univ. of Texas, Austin (United States))

    1991-03-01

    The Maracaibo basin is presently located in a topographic depression on the Maracaibo block, a triangular, fault-bounded block within the Caribbean-South America plate boundary of northwestern Venezuela. Intense oil exploration over the last 50 years has produced a large amount of seismic and well data that can be used to constrain four Jurassic to Recent tectonic and depositional events that affected the region: (1). Late Jurassic rift phase and subsidence along normal faults striking north-northeast across the floor of the basin; (2) Cretaceous to early Eocene subsidence recorded by shallow to deep marine carbonate and clastic rocks that thicken from south to north and completely cover Permian rocks of the Merida arch; (3) Eocene folding, thrusting, and initial reactivation of Jurassic normal faults as convergent strike-slip and reverse faults. Eocene clastic sediments are thickest in a narrow northwest-trending foredeep on the northeastern margin of the basin; (4) Late Miocene to Recent northwest-southeast convergence is marked by continued reactivation of Jurassic normal faults as reverse and left-lateral strike-slip faults, uplift of mountain ranges bordering the basin, and deposition of up to 10 km of clastic sediment.

  15. Pros and cons of power combined cycle in Venezuela

    SciTech Connect

    Alvarez, C.; Hernandez, S. [Tecnoconsult/Tecnofluor, Caracas (Venezuela)

    1997-09-01

    In Venezuela combined cycle power has not been economically attractive to electric utility companies, mainly due to the very low price of natural gas. Savings in cost of natural gas due to a higher efficiency, characteristic of this type of cycle, does not compensate additional investments required to close the simple cycle (heat recovery steam generator (HRSG) and steam turbine island). Low gas prices have contributed to create a situation characterized by investors` reluctance to commit capital in gas pipe lines and associated equipment. The Government is taking measures to improve economics. Recently (January 1, 1997), the Ministry of Energy and Mines raised the price of natural gas, and established a formula to tie its price to the exchange rate variation (dollar/bolivar) in an intent to stimulate investments in this sector. This is considered a good beginning after a price freeze for about three years. Another measure that has been announced is the implementation of a corporate policy of outsourcing to build new gas facilities such as pipe lines and measuring and regulation stations. Under these new circumstances, it seems that combined cycle will play an important role in the power sector. In fact, some power generation projects are considering building new plants using this technology. An economical comparative study is presented between simple and combined cycles power plant. Screening curves are showed with a gas price forecast based on the government decree recently issued, as a function of plant capacity factor.

  16. New insights into chloramphenicol biosynthesis in Streptomyces venezuelae ATCC 10712.

    PubMed

    Fernández-Martínez, Lorena T; Borsetto, Chiara; Gomez-Escribano, Juan Pablo; Bibb, Maureen J; Al-Bassam, Mahmoud M; Chandra, Govind; Bibb, Mervyn J

    2014-12-01

    Comparative genome analysis revealed seven uncharacterized genes, sven0909 to sven0915, adjacent to the previously identified chloramphenicol biosynthetic gene cluster (sven0916-sven0928) of Streptomyces venezuelae strain ATCC 10712 that was absent in a closely related Streptomyces strain that does not produce chloramphenicol. Transcriptional analysis suggested that three of these genes might be involved in chloramphenicol production, a prediction confirmed by the construction of deletion mutants. These three genes encode a cluster-associated transcriptional activator (Sven0913), a phosphopantetheinyl transferase (Sven0914), and a Na(+)/H(+) antiporter (Sven0915). Bioinformatic analysis also revealed the presence of a previously undetected gene, sven0925, embedded within the chloramphenicol biosynthetic gene cluster that appears to encode an acyl carrier protein, bringing the number of new genes likely to be involved in chloramphenicol production to four. Microarray experiments and synteny comparisons also suggest that sven0929 is part of the biosynthetic gene cluster. This has allowed us to propose an updated and revised version of the chloramphenicol biosynthetic pathway. PMID:25267678

  17. Late quaternary environmental history of Lake Valencia, Venezuela

    USGS Publications Warehouse

    Platt, Bradbury J.; Leyden, B.; Salgado-Labouriau, M.; Lewis, W.M., Jr.; Schubert, C.; Binford, M.W.; Frey, D.G.; Whitehead, D.R.; Weibezahn, F.H.

    1981-01-01

    Chemical, paleontological, and mineralogical analyses of a 7.5-meter core from the middle of Lake Valencia, Venezuela, have provided information on the paleoclimatic history of this low-elevation, low-latitude site for the last 13,000 years. The data show that dry climates existed in this region from 13,000 years before present (B.P.) until about 10,000 years B.P. The Lake Valencia Basin was occupied by intermittent saline marshes at that time. About 10,000 years B.P., a permanent lake of fluctuating salinity formed and arboreal plant communities replaced the earlier dominant xeric herbaceous vegetation and marsh plants. By 8500 years B.P., Lake Valencia reached moderate to low salinities and discharged water; the modern vegetation became established at that time. After 8500 years B.P., the lake twice ceased discharging as a result of reduced watershed moisture. The second of these drying episodes is still in progress and has been aggravated by human activities in the watershed. Copyright ?? 1981 AAAS.

  18. Cretaceous to Eocene passive margin sedimentation in Northeastern Venezuela

    SciTech Connect

    Erikson, J.P. (Dartmouth College, Hanover, NH (United States))

    1993-02-01

    Twenty two palinspastic paleogeographic maps are presented for the Cretaceous to Eocene strata of the Serrania del Interior of northeastern Venezuela. The mapped lithologies, environmental conditions, and evolving depositional systems record [approximately]90 m.y. of dominantly marine sedimentation on the only observable Mesozoic passive margin in the Western Hemisphere. The depositional systems of the passive margin are heterogeneous at lateral (i.e., along-margin) length scales greater than [approximately]40 km. The primary lateral heterogeneity is caused by a major Lower Cretaceous deltaic system that emanated southwest of the Serrania del Interior. All important intervals, such as the laterally variable Aptian-Albian El Cantil platform limestone and the hydrocarbon source rocks of the Upper Cretaceous Querecual and San Antonio formations, are related to probable causal mechanisms and environmental conditions. Stratigraphic events have been interpreted as of either local or regional extent; based on a combination of outcrop sedimentologic analyses and regional depositional systems interpretation. The 3-dimensional distribution of depositional systems and systems tracts reveals 4-6 regional sequence boundaries separated by 4-20 m.y. Subsidence analyses support the facies interpretation of a passive margin by showing continuous, thermally dominated subsidence during the Cretaceous to Eocene interval. Subsidence and accumulation rates increased and facies changed significantly in the Oligocene, indicating the end of passive margin sedimentation and the initiation of foredeep subsidence and accumulation associated with overthrusting the eastward-advancing Caribbean Plate.

  19. New Insights into Chloramphenicol Biosynthesis in Streptomyces venezuelae ATCC 10712

    PubMed Central

    Fernández-Martínez, Lorena T.; Borsetto, Chiara; Gomez-Escribano, Juan Pablo; Bibb, Maureen J.; Al-Bassam, Mahmoud M.; Chandra, Govind

    2014-01-01

    Comparative genome analysis revealed seven uncharacterized genes, sven0909 to sven0915, adjacent to the previously identified chloramphenicol biosynthetic gene cluster (sven0916–sven0928) of Streptomyces venezuelae strain ATCC 10712 that was absent in a closely related Streptomyces strain that does not produce chloramphenicol. Transcriptional analysis suggested that three of these genes might be involved in chloramphenicol production, a prediction confirmed by the construction of deletion mutants. These three genes encode a cluster-associated transcriptional activator (Sven0913), a phosphopantetheinyl transferase (Sven0914), and a Na+/H+ antiporter (Sven0915). Bioinformatic analysis also revealed the presence of a previously undetected gene, sven0925, embedded within the chloramphenicol biosynthetic gene cluster that appears to encode an acyl carrier protein, bringing the number of new genes likely to be involved in chloramphenicol production to four. Microarray experiments and synteny comparisons also suggest that sven0929 is part of the biosynthetic gene cluster. This has allowed us to propose an updated and revised version of the chloramphenicol biosynthetic pathway. PMID:25267678

  20. Confronting Health Disparities: Latin American Social Medicine in Venezuela

    PubMed Central

    Mantini-Briggs, Clara

    2009-01-01

    Objectives. We explored the emergence and effectiveness of Venezuela's Misión Barrio Adentro, “Inside the Neighborhood Mission,” a program designed to improve access to health care among underserved residents of the country, hoping to draw lessons to apply to future attempts to address acute health disparities. Methods. We conducted our study in 3 capital-region neighborhoods, 2 small cities, and 2 rural areas, combining systematic observations with interviews of 221 residents, 41 health professionals, and 28 government officials. We surveyed 177 female and 91 male heads of household. Results. Interviews suggested that Misión Barrio Adentro emerged from creative interactions between policymakers, clinicians, community workers, and residents, adopting flexible, problem-solving strategies. In addition, data indicated that egalitarian physician–patient relationships and the direct involvement of local health committees overcame distrust and generated popular support for the program. Media and opposition antagonism complicated physicians’ lives and clinical practices but heightened the program's visibility. Conclusions. Top-down and bottom-up efforts are less effective than “horizontal” collaborations between professionals and residents in underserved communities. Direct, local involvement can generate creative and dynamic efforts to address acute health disparities in these areas. PMID:19150916

  1. MODIS detects oil spills in Lake Maracaibo, Venezuela

    NASA Astrophysics Data System (ADS)

    Hu, Chuanmin; Müller-Karger, Frank E.; Taylor, Charles (Judd); Myhre, Douglas; Murch, Brock; Odriozola, Ana L.; Godoy, Gonzalo

    Starting December 2002, the oil industry operating in and around Lake Maracaibo in Venezuela suffered a series of accidents (Figure 1). Fires, the sinking of two barges, rupture of oil pipelines, spills from floating oil storage and transfer stations, and malfunctioning of oil extraction platforms led to extensive oil spills. Local and federal Venezuelan government oil industry experts directly observed the series of spills from aircraft, helicopter, and various surface vessels. The spills were recorded in December by official photography and video of leaking infrastructure, and unofficial recordings continued in January and February 2003 (http://wwwcomlago.com.ve/fotosvideos. html).These surveys did not provide sufficient spatial or temporal coverage to assess the magnitude, area covered, or duration of the spills. Clear images of the spill were captured with NASAs Moderate Resolution Imaging Spectroradiometer (MODIS), however. MODIS is effectively a sophisticated digital camera launched aboard the Terra satellite in December 1999, and aboard the Aqua satellite in April 2002 [Esaias et al., 1998; http://modis.gsfc.nasa.gov]. Its medium-resolution bands (250 and 500 m resolution) are available to the public, and have great potential in coastal monitoring. This article demonstrates how MODIS can provide basic and critical assessments of oil spills.

  2. Diel variation of nitrogen fixation in Lake Valencia, Venezuela

    SciTech Connect

    Levine, S.N.; Lewis, W.M. Jr.

    1984-07-01

    During 1981 the authors examined the diel variations of nitrogen fixation in Lake Valencia, Venezuela. Four species of heterocyst-bearing blue-green algae were common but subdominant in the phytoplankton. In samples taken from and incubated at 0.5 m, the rate of nitrogen fixation per unit volume of water was lowest at night, increased from dawn until early afternoon, and then diminished between late afternoon and the first hour of darkness. This pattern was caused partly by diel changes in light intensity and partly by diel migrations of heterocystous blue-green algae. The heterocyst-specific nitrogen fixation rates at 0.5 m were much less variable than the nitrogen fixation rates per unit volume of water. Heterocyst-specific rates rose rapidly in early morning and fell slowly in the evening, but were almost constant over much of the day. Heterocyst-specific nitrogen fixation rates were very close to those predicted by a model based on the light dependency of nitrogen fixation.

  3. Geological study of Guafita field reservoirs, Apure basin, southwestern Venezuela

    SciTech Connect

    Moya, E.; Abud, J.; Hernandez, J.

    1989-03-01

    The medium-grade oil reservoirs of the Guafita field, Apure basin, southwestern Venezuela, represent the northeastern extension of the La Yuca-Cano Limon fields of Colombia. A detailed integrated reservoir study is being carried out in Guafita in order to define the geological model and to improve its development plan. The stratigraphic sequence of interest in the southern block of the Guafita field contains approximately 600 ft of sediments of Cretaceous and Oligocene-Miocene ages (Quevedo Member of the Navay and Guafita Formations, respectively). Fifteen prospective intervals, with approximately 150 ft of net oil sand, have been defined within this sequence by detailed correlation in the Colombian fields and four have been defined in the Quevedo Member. Lower delta-plain and delta-front depositional environments have been recognized from core studies in the Tertiary sediments. A combination of both structural and stratigraphic traps controls the hydrocarbon accumulations in the Guafita field, and at least two sealing shale regional markers have been defined. As a preliminary result of the approach of defining reservoir geometry and mapping each major sand body separately, the proven reserves of the Guafita field will decrease by approximately 12%. The possibility of fluid communication with the Colombian fields through the small-displacement riddle faults was established by means of juxtaposition of sand bodies.

  4. Geographical distribution of the dermatophytes: a review.

    PubMed Central

    Philpot, C. M.

    1978-01-01

    In these days of rapid transit from continent to continent, and the increasing mobility of people, agents of disease are no longer geographically restricted. Disease contracted half way across the world may become manifest in a country in which the pathogen is not normally found. Thus knowledge of the geographical distribution of pathogens becomes increasingly important when a diagnosis is being made. This is as true of ringworm fungi as of any other group of microorganisms. In the last 12 years, in the Mycological Reference Laboratory, an increasing number of exotic dermatophytes have been seen, related in part at least to the great increase in the number of non-British residents. Not all species of dermatophytes are cosmopolitan in their distribution throughout the world. While some have been recorded from every continent, others have geographically limited areas of greater or lesser extent. Surveys taken at intervals in a country may show a rise and fall in occurrence of several species as habits change, populations move and medical facilities became increasingly well-distributed. There have been few geographical surveys of ringworm fungi that have covered the world. Ajello (1960, 1974) has reviewed the individual species with regard to geographical location, while Vanbreuseghem & de Vroey (1970) attempted to estimate the relative importance of the various species in terms of numbers of isolations reported. This paper therefore reviews the world dermatophyte flora in terms of the dominant agents in the various countries, and some of the changes that have been recorded. PMID:75918

  5. Photographic Mosaics and Geographic Generalizations: A Perceptual Approach to Geographic Education

    ERIC Educational Resources Information Center

    Castner, Henry W.

    2003-01-01

    If vision can be considered the basis of geographic inquiry, then it must involve looking with discrimination--the ability to discern clues in our surroundings that speak to spatial processes or patterns in all aspects of geography--physical, cultural, economic, and so on. Geographic thinking also involves making spatial generalizations. We do…

  6. A Framework for Geographic Object-Based Image Analysis (GEOBIA) based on geographic ontology

    NASA Astrophysics Data System (ADS)

    Gu, H. Y.; Li, H. T.; Yan, L.; Lu, X. J.

    2015-06-01

    GEOBIA (Geographic Object-Based Image Analysis) is not only a hot topic of current remote sensing and geographical research. It is believed to be a paradigm in remote sensing and GIScience. The lack of a systematic approach designed to conceptualize and formalize the class definitions makes GEOBIA a highly subjective and difficult method to reproduce. This paper aims to put forward a framework for GEOBIA based on geographic ontology theory, which could implement "Geographic entities - Image objects - Geographic objects" true reappearance. It consists of three steps, first, geographical entities are described by geographic ontology, second, semantic network model is built based on OWL(ontology web language), at last, geographical objects are classified with decision rule or other classifiers. A case study of farmland ontology was conducted for describing the framework. The strength of this framework is that it provides interpretation strategies and global framework for GEOBIA with the property of objective, overall, universal, universality, etc., which avoids inconsistencies caused by different experts' experience and provides an objective model for mage analysis.

  7. Pre-Service Geography Teachers' Confidence in Geographical Subject Matter Knowledge and Teaching Geographical Skills

    ERIC Educational Resources Information Center

    Harte, Wendy; Reitano, Paul

    2015-01-01

    This research tracked the confidence of 16 undergraduate and postgraduate pre-service geography teachers as they completed a single semester, senior phase geography curriculum course. The study focused specifically on the pre-service teachers' confidence in geographical subject matter knowledge and their confidence in teaching geographical skills.…

  8. Wider sampling reveals a non-sister relationship for geographically contiguous lineages of a marine mussel.

    PubMed

    Cunha, Regina L; Nicastro, Katy R; Costa, Joana; McQuaid, Christopher D; Serrão, Ester A; Zardi, Gerardo I

    2014-06-01

    The accuracy of phylogenetic inference can be significantly improved by the addition of more taxa and by increasing the spatial coverage of sampling. In previous studies, the brown mussel Perna perna showed a sister-lineage relationship between eastern and western individuals contiguously distributed along the South African coastline. We used mitochondrial (COI) and nuclear (ITS) sequence data to further analyze phylogeographic patterns within P. perna. Significant expansion of the geographical coverage revealed an unexpected pattern. The western South African lineage shared the most recent common ancestor (MRCA) with specimens from Angola, Venezuela, and Namibia, whereas eastern South African specimens and Mozambique grouped together, indicating a non-sister relationship for the two South African lineages. Two plausible biogeographic scenarios to explain their origin were both supported by the hypotheses-testing analysis. One includes an Indo-Pacific origin for P. perna, dispersal into the Mediterranean and Atlantic through the Tethys seaway, followed by recent secondary contact after southward expansion of the western and eastern South African lineages. The other scenario (Out of South Africa) suggests an ancient vicariant divergence of the two lineages followed by their northward expansion. Nevertheless, the "Out of South Africa" hypothesis would require a more ancient divergence between the two lineages. Instead, our estimates indicated that they diverged very recently (310 kyr), providing a better support for an Indo-Pacific origin of the two South African lineages. The arrival of the MRCA of P. perna in Brazil was estimated at 10 [0-40] kyr. Thus, the hypothesis of a recent introduction in Brazil through hull fouling in wooden vessels involved in the transatlantic itineraries of the slave trade did not receive strong support, but given the range for this estimate, it could not be discarded. Wider geographic sampling of marine organisms shows that lineages with contiguous distributions need not share a common ancestry. PMID:25360249

  9. Geographic variation in marine turtle fibropapillomatosis

    USGS Publications Warehouse

    Greenblatt, R.J.; Work, T.M.; Dutton, P.; Sutton, C.A.; Spraker, T.R.; Casey, R.N.; Diez, C.E.; Parker, D.; St. Ledger, J.; Balazs, G.H.; Casey, J.W.

    2005-01-01

    We document three examples of fibropapillomatosis by histology, quantitative polymerase chain reaction (qPCR), and sequence analysis from three different geographic areas. Tumors compatible in morphology with fibropapillomatosis were seen in green turtles from Puerto Rico and San Diego (California) and in a hybrid loggerhead/ hawksbill turtle from Florida Bay (Florida). Tumors were confirmed as fibropapillomas on histology, although severity of disease varied between cases. Polymerase chain reaction (PCR) analyses revealed infection with the fibropapilloma-associated turtle herpesvirus (FPTHV) in all cases, albeit at highly variable copy numbers per cell. Alignment of a portion of the polymerase gene from each fibropapilloma-associated turtle herpesvirus isolate demonstrated geographic variation in sequence. These cases illustrate geographic variation in both the pathology and the virology of fibropapillomatosis.

  10. Geographic variation in marine turtle fibropapillomatosis.

    PubMed

    Greenblatt, Rebecca J; Work, Thierry M; Dutton, Peter; Sutton, Claudia A; Spraker, Terry R; Casey, Rufina N; Diez, Carlos E; Parker, Denise; St Leger, Judy; Balazs, George H; Casey, James W

    2005-09-01

    We document three examples of fibropapillomatosis by histology, quantitative polymerase chain reaction (qPCR), and sequence analysis from three different geographic areas. Tumors compatible in morphology with fibropapillomatosis were seen in green turtles from Puerto Rico and San Diego (California) and in a hybrid loggerhead/ hawksbill turtle from Florida Bay (Florida). Tumors were confirmed as fibropapillomas on histology, although severity of disease varied between cases. Polymerase chain reaction (PCR) analyses revealed infection with the fibropapilloma-associated turtle herpesvirus (FPTHV) in all cases, albeit at highly variable copy numbers per cell. Alignment of a portion of the polymerase gene from each fibropapilloma-associated turtle herpesvirus isolate demonstrated geographic variation in sequence. These cases illustrate geographic variation in both the pathology and the virology of fibropapillomatosis. PMID:17312778

  11. Energy demand management and pricing in oil-exporting countries: Venezuela and Mexico

    SciTech Connect

    Randall, L.

    1986-01-01

    The demand for energy in oil-exporting nations is important for its effects on both oil-exporting and oil-importing nations. Energy demand management takes place in the context of energy policy and national development plans, because the demand for energy is derived from the demand for other products, and because national goals are more important than those of a single sector. The energy demand management policies of Venezuela and Mexico are chosen for study because of Venezuela's historic importance as a world exporter, stable supplier of oil, and creator of OPEC, and because of Mexico's extensive oil reserves and special relationship with the United States.

  12. Late Pleistocene and Holocene Hydroclimate Variability in the Tropical Andes from Alpine Lake Sediments, Cordillera de Mérida, Venezuela

    NASA Astrophysics Data System (ADS)

    Larsen, D. J.; Abbott, M. B.; Polissar, P. J.

    2014-12-01

    The tropics play a major role in the global hydrologic cycle and changes to tropical rainfall patterns have critical implications for water resources and ecosystem dynamics over large geographic scales. In tropical South America, late Pleistocene and Holocene precipitation variability has been documented in geologic records and associated with numerous external and internal variables, including changes in summer insolation, South American summer monsoon strength, Pacific Ocean sea surface temperatures, continental moisture recycling, and other climate processes. However, there are few records from the northern hemisphere tropical Americas, a key region for understanding interhemispheric linkages and the drivers of tropical hydroclimate variability. Here, we present a ~13 ka record of coupled hydroclimate and environmental changes from Laguna Brava, a small (~0.07 km2), hydrologically closed lake basin situated at 2400 m asl in the Cordillera de Mérida, Venezuela. Sediment cores collected from varying water depths and proximity to shore are placed in a chronologic framework using radiocarbon ages from terrestrial macrofossils, and analyzed for a suite of physical, bulk geochemical, and stable isotopic parameters. Compound specific hydrogen isotope (D/H) measurements of terrestrial plant waxes (long-chain n-alkanes) show a sharp increase in the late Pleistocene, followed by a long-term trend toward more negative values that suggest a ~20‰ decrease in the D/H ratios of South American tropical precipitation during the Holocene. This pattern is consistent in sign and magnitude to other South American precipitation reconstructions from both hemispheres, indicating interhemispheric similarities in tropical hydroclimate variability. Superimposed on this continent-scale trend are changes in moisture balance and environmental conditions in the Venezuelan Andes. We reconstruct these parameters at Laguna Brava at multidecadal and centennial resolution and evaluate this record within the context of late Pleistocene and Holocene South American tropical hydroclimate variability and global climate changes.

  13. New Neotropical Sebacinales Species from a Pakaraimaea dipterocarpacea Forest in the Guayana Region, Southern Venezuela: Structural Diversity and Phylogeography

    PubMed Central

    Moyersoen, Bernard; Weiß, Michael

    2014-01-01

    Pakaraimaea dipterocarpacea, a member of the Dipterocarpaceae endemic in the Guayana region, is associated with a diverse community of ectomycorrhizal (ECM) fungi. Amongst the 41 ECM fungal species detected in a 400 m2 P. dipterocarpacea ssp. nitida plot in Southern Venezuela, three species belonged to the Sebacinales. We tested whether ECM anatomotype characterization can be used as a feasible element in an integrative taxonomy in this diverse fungal group, where the relevance of fruitbody morphology for species delimitation seems limited. Using a combination of ECM morpho-anatomical characterizations and phylogenetic analyses based on nuclear ITS and LSU sequences, we report three new species. The main distinguishing features of Sebacina guayanensis are the yellowish cell walls together with conspicuous undifferentiated, uniform compact (type B) rhizomorphs. Staghorn-like hyphae are characteristic of S. tomentosa. The combination of clusters of thick-walled emanating hyphae, including hyphae similar to awl-shaped cystidia with basal dichotomous or trichotomous ramifications, and the presence of type B rhizomorphs were characteristic of a third, yet unnamed species. The three species belong to three different, possibly specifically tropical clades in Sebacinales Group A. The geographic distribution of phylogenetically related strains was wide, including a Dicymbe forest in Guyana and an Ecuadorian rainforest with Coccoloba species. We show that ECM morpho-anatomy can be used, in combination with other analyses, to delineate species within Sebacinales Group A. In addition to phylogenetic information, type B rhizomorphs observed in different Sebacinales clades have important ecological implications for this fungal group. The phylogeography of Sebacinales suggests that dispersion and host jump are important radiation mechanisms that shaped P. dipterocarpacea ECM fungal community. This study emphasizes the need for more sequence data to evaluate the hypothesis that phylogeographic relationships between neo- and paleotropical ECM fungal species could be attributed to the vicariance of cross-continental hosts such as the Dipterocarpacae. PMID:25072467

  14. New neotropical sebacinales species from a Pakaraimaea dipterocarpacea forest in the Guayana Region, Southern Venezuela: structural diversity and phylogeography.

    PubMed

    Moyersoen, Bernard; Wei?, Michael

    2014-01-01

    Pakaraimaea dipterocarpacea, a member of the Dipterocarpaceae endemic in the Guayana region, is associated with a diverse community of ectomycorrhizal (ECM) fungi. Amongst the 41 ECM fungal species detected in a 400 m2 P. dipterocarpacea ssp. nitida plot in Southern Venezuela, three species belonged to the Sebacinales. We tested whether ECM anatomotype characterization can be used as a feasible element in an integrative taxonomy in this diverse fungal group, where the relevance of fruitbody morphology for species delimitation seems limited. Using a combination of ECM morpho-anatomical characterizations and phylogenetic analyses based on nuclear ITS and LSU sequences, we report three new species. The main distinguishing features of Sebacina guayanensis are the yellowish cell walls together with conspicuous undifferentiated, uniform compact (type B) rhizomorphs. Staghorn-like hyphae are characteristic of S. tomentosa. The combination of clusters of thick-walled emanating hyphae, including hyphae similar to awl-shaped cystidia with basal dichotomous or trichotomous ramifications, and the presence of type B rhizomorphs were characteristic of a third, yet unnamed species. The three species belong to three different, possibly specifically tropical clades in Sebacinales Group A. The geographic distribution of phylogenetically related strains was wide, including a Dicymbe forest in Guyana and an Ecuadorian rainforest with Coccoloba species. We show that ECM morpho-anatomy can be used, in combination with other analyses, to delineate species within Sebacinales Group A. In addition to phylogenetic information, type B rhizomorphs observed in different Sebacinales clades have important ecological implications for this fungal group. The phylogeography of Sebacinales suggests that dispersion and host jump are important radiation mechanisms that shaped P. dipterocarpacea ECM fungal community. This study emphasizes the need for more sequence data to evaluate the hypothesis that phylogeographic relationships between neo- and paleotropical ECM fungal species could be attributed to the vicariance of cross-continental hosts such as the Dipterocarpacae. PMID:25072467

  15. The National Council for Geographic Education

    NSDL National Science Digital Library

    The National Council for Geographic Education (NCGE) is an international organization that emphasizes the importance of geographic education at all age levels â?? in school and out. They boast a membership of â??teachers, professors, students, and other individuals who believe in the importance of geography, both in and out of school.â? NCGE distributes two widely-known and well-subscribed journals, the Journal of Geography and The Geography Teacher. These journals are available to all members along with other e-leaning publications and web-based teaching resources.

  16. Geographic information system/watershed model interface

    USGS Publications Warehouse

    Fisher, Gary T.

    1989-01-01

    Geographic information systems allow for the interactive analysis of spatial data related to water-resources investigations. A conceptual design for an interface between a geographic information system and a watershed model includes functions for the estimation of model parameter values. Design criteria include ease of use, minimal equipment requirements, a generic data-base management system, and use of a macro language. An application is demonstrated for a 90.1-square-kilometer subbasin of the Patuxent River near Unity, Maryland, that performs automated derivation of watershed parameters for hydrologic modeling.

  17. Enhancing robustness and immunization in geographical networks

    SciTech Connect

    Huang Liang [Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000 (China); Department of Physics, Lanzhou University, Lanzhou 730000 (China); Yang Kongqing [Center for Complex Systems, Jimei University, Xiamen 361021 (China); Department of Physics, Lanzhou University, Lanzhou 730000 (China); Yang Lei [Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000 (China); Department of Physics, Lanzhou University, Lanzhou 730000 (China); Beijing-Hong Kong-Singapore Joint Centre for Nonlinear and Complex Systems, Hong Kong (China); Hong Kong Baptist University, Hong Kong (China)

    2007-03-15

    We find that different geographical structures of networks lead to varied percolation thresholds, although these networks may have similar abstract topological structures. Thus, strategies for enhancing robustness and immunization of a geographical network are proposed. Using the generating function formalism, we obtain an explicit form of the percolation threshold q{sub c} for networks containing arbitrary order cycles. For three-cycles, the dependence of q{sub c} on the clustering coefficients is ascertained. The analysis substantiates the validity of the strategies with analytical evidence.

  18. STSHV a teleinformatic system for historic seismology in Venezuela

    NASA Astrophysics Data System (ADS)

    Choy, J. E.; Palme, C.; Altez, R.; Aranguren, R.; Guada, C.; Silva, J.

    2013-05-01

    From 1997 on, when the first "Jornadas Venezolanas de Sismicidad Historica" took place, a big interest awoke in Venezuela to organize the available information related to historic earthquakes. At that moment only existed one published historic earthquake catalogue, that from Centeno Grau published the first time in 1949. That catalogue had no references about the sources of information. Other catalogues existed but they were internal reports for the petroleum companies and therefore difficult to access. In 2000 Grases et al reedited the Centeno-Grau catalogue, it ended up in a new, very complete catalogue with all the sources well referenced and updated. The next step to organize historic seismicity data was, from 2004 to 2008, the creation of the STSHV (Sistema de teleinformacion de Sismologia Historica Venezolana, http://sismicidad.hacer.ula.ve ). The idea was to bring together all information about destructive historic earthquakes in Venezuela in one place in the internet so it could be accessed easily by a widespread public. There are two ways to access the system. The first one, selecting an earthquake or a list of earthquakes, and the second one, selecting an information source or a list of sources. For each earthquake there is a summary of general information and additional materials: a list with the source parameters published by different authors, a list with intensities assessed by different authors, a list of information sources, a short text summarizing the historic situation at the time of the earthquake and a list of pictures if available. There are searching facilities for the seismic events and dynamic maps can be created. The information sources are classified in: books, handwritten documents, transcription of handwritten documents, documents published in books, journals and congress memories, newspapers, seismologic catalogues and electronic sources. There are facilities to find specific documents or lists of documents with common characteristics. For each document general information is displayed together with an extract of the information relating to the earthquake. If the complete document was available and no problem with the publishers rights a pdf copy of the document was included. We found this system extremely useful for studying historic earthquakes, as one can access immediately previous research works about an earthquake and it allows to check easily the historic information and so to validate the intensity data. So far, the intensity data have not been completed for earthquakes after 2000. This information would be important for improving calibration of intensity - magnitude calibrations of historic events, and is a work in progress. On the other hand, it is important to mention that "El Catálogo Sismológico Venezolano del siglo XX" (The Seismological Venezuelan Catalog), published in 2012, updates seismic information up to 2007, and that the STSHV was one of its primary sources of information.

  19. Coal bed methane potential in Venezuela-The forgotten resource

    SciTech Connect

    Vasquez-Herrera, A.R. [VVA Consultores, Caracas (Venezuela); Bereskin, S.R.; McLennan, J.D. [TerraTek, Inc., Salt Lake City, UT (United States)

    1996-08-01

    In nations already possessing riches of hydrocarbons situated in conventional reservoirs, evaluation of coal-bearing sequences for potential gas is logically delayed or ignored. Nonetheless, Venezuelan coals have long been recognized as stratigraphically associated with oil accumulations, but because coalbed methane (CBM) is a relatively new worldwide phenomenon, CBM potential has not been widely assessed in the country. Two general areas contain vast accumulations of coal for potential CBM activity: (1) the Maracaibo basin, containing the Guasare (northwest), Lobatera-Santo Domingo (southwest) and Urumaco (northeast) districts; and (2) the Oficina basin in eastern Venezuela possessing abundant accumulations related to the Faja Petrolifera de Orinoco (Orinoco Oil Belt). In both basins, high volatile bituminous and lignitic coals of mostly Oligo-Miocene age are abundantly found. Older coals are also present especially in the Maracaibo area. Two factors represent powerful incentives for CBM exploitation: addition of known reserves for economic considerations, and aid in bringing heavy crude oil to the surface by additional gas lift and oil viscosity reduction. Other favorable factors important for CBM methodology include: (1) abundant coals lying above known conventional reservoir targets; (2).6 - 1% vitrinite reflectance measurements in the Orinoco Oil Belt; (3) many coals occurring above 1500 m; (4) documented mine explosions especially in the 1920s and 1930s; (5) a strong tectonic overprint to perhaps add shear fractures to already cleated coals; (6) individual coal thickness up to 12 m with averages in the .8 m range; and (7) gas shows while drilling coal-rich intervals.

  20. Science Fiction for Geographers: Selected Works.

    ERIC Educational Resources Information Center

    Elbow, Gary S.; Martinson, Tom L.

    1980-01-01

    Explains how college level teachers of geography can use works of science fiction to help students understand geographical settings and create impressionistic pictures of a given region in their minds. Particular areas in which science fiction is useful include invented terrestrial landscapes, specialized extraterrestrial landscapes, disaster…

  1. Snake food preference: innate intraspecific geographic variation.

    PubMed

    Dix, M W

    1968-03-29

    Compared to Florida individuals, a smaller percentage of Massachusetts Thamnophis sirtalis sirtalis will accept fish. Both experienced adults and isolated newborn snakes respond similarly; the behavior is innate and correlated with habitat differences between the two localities. Although food preference in Natrix sipedon is also innate, geographic variation is not as clearcut. PMID:5732489

  2. GEOGRAPHIC INDEX OF ENVIRONMENTAL ARTICLES - 1993

    EPA Science Inventory

    This index was produced in accordance with the Environmental Research Geographic Location Information Act, Public Law 101-617, enacted by the United States Congress on November 16, 1990. ompiled by the U.S. Environmental Protection Agency, it is intended as a quick reference for ...

  3. GEOGRAPHIC INDEX OF ENVIRONMENTAL ARTICLES - 1992

    EPA Science Inventory

    This index was produced in accordance with the Environmental Research Geographic Location Information Act, Public Law 101-617, enacted by the United States Congress on November 16, 1990. ompiled by the U.S. Environmental Protection Agency, it is intended as a quick reference for ...

  4. BachelorofScience ComputerScienceandGeographical

    E-print Network

    Seldin, Jonathan P.

    _____ Computer Science 3770 - Human-Computer Interaction _____ Computer Science 3780 - Data CommunicationsBachelorofScience ComputerScienceandGeographical InformationScience This is a planning guide: ____________________________________ Major in Computer Science and GIS: www.uleth.ca/artsci/gis Departments: Geography, and Mathematics

  5. Bootstrapping Multilingual Geographical Gazetteers from Corpora

    E-print Network

    Tilburg, Universiteit van

    /Language and Information Science, Tilburg University M.G.J.vanErp@uvt.nl Abstract. In this paper an approach, Dutch and German, starting with a small English seed-list. Apart from providing a possible approach to automatically generating multilingual geographical name gazetteers via two bootstrapping loops on different

  6. Promoting Geographic Information System Usage across Campus

    ERIC Educational Resources Information Center

    Spiegel, Shaun; Kinikin, Janae

    2004-01-01

    In this article the authors discuss how they implemented and promoted Geographic Information System (GIS) applications at Weber State University (WSU), a four-year public institution with two campuses. GIS is a type of computer system made of hardware, software, and data that allows the mapping of spatially related layers that have a common…

  7. Geographic Education in Turkish High Schools

    ERIC Educational Resources Information Center

    Tas, Halil I.

    2005-01-01

    This paper presents a review of geographic curricula, teaching methods, materials and assessments in Turkish high schools. Geopolitics and political instability have contributed to large fluctuations in emphasis on geography in Turkish education and have also affected the content of the geography curriculum.

  8. Perceiving Virtual Geographical Slant: Action Influences Perception

    ERIC Educational Resources Information Center

    Creem-Regehr, Sarah H.; Gooch, Amy A.; Sahm, Cynthia S.; Thompson, William B.

    2004-01-01

    In 4 experiments, the authors varied the extent and nature of participant movement in a virtual environment to examine the influence of action on estimates of geographical slant. Previous studies showed that people consciously overestimate hill slant but can still accurately guide an action toward the hill (D. R. Proffitt, M. Bhalla, R.…

  9. The National Geographic Society's Teaching Geography Project.

    ERIC Educational Resources Information Center

    Bockenhauer, Mark H.

    1993-01-01

    Contends that the National Geographic Society's Teaching Geography Project is an inservice teacher education success story. Describes the origins, objectives, and development of the project. Summarizes the impact of the project and contends that its success is the result of the workshop format and guided practice in instructional strategies. (CFR)

  10. Geographic analysis of shigellosis in Vietnam

    Microsoft Academic Search

    Deok Ryun Kim; Mohammad Ali; Vu Dinh Thiem; Jin-Kyung Park; Lorenz von Seidlein; John Clemens

    2008-01-01

    Geographic and ecological analysis may provide investigators useful ecological information for the control of shigellosis. This paper provides distribution of individual Shigella species in space, and ecological covariates for shigellosis in Nha Trang, Vietnam. Data on shigellosis in neighborhoods were used to identify ecological covariates. A Bayesian hierarchical model was used to obtain joint posterior distribution of model parameters and

  11. Geography and Geographical Information Science: Interdisciplinary Integrators

    ERIC Educational Resources Information Center

    Ellul, Claire

    2015-01-01

    To understand how Geography and Geographical Information Science (GIS) can contribute to Interdisciplinary Research (IDR), it is relevant to articulate the differences between the different types of such research. "Multidisciplinary" researchers work in a "parallel play" mode, completing work in their disciplinary work streams…

  12. Geographic Localization of International Technology Diffusion

    Microsoft Academic Search

    Wolfgang Keller

    2000-01-01

    Convergence in per capita income across countries turns on whether technological knowledge spillover are global or local. This paper estimates the amount of spillover from R&D expenditures in major industrialized countries on a geographic basis. A new data set is used which encompasses most of the world's innovative activity at the industry-level between the years 1970 and 1995. First, I

  13. Geographic Localization of International Technology Diffusion

    Microsoft Academic Search

    Wolfgang Keller

    2002-01-01

    Income convergence across countries turns on whether technological knowledge spillovers are global or local. I estimate the amount of spillovers from R&D expenditures on a geographic basis, using a new data set which encompasses most of the world's innovative activity between 1970 and 1995. I find that technology is to a substantial degree local, not global, as the benefits from

  14. Geographic Localization of International Technology Diffusion

    Microsoft Academic Search

    Wolfgang Keller

    2001-01-01

    Convergence in per capita income across countries turns on whether technological knowledge spillovers are global or local in a large class of models. This Paper estimates the amount of spillovers from R&D expenditures in major industrialized countries on a geographic basis. A new data set is used which encompasses most of the world's innovative activity at the industry-level between the

  15. Federal Government Applications - Geographic Information Systems & Science

    Cancer.gov

    TOXMAP - a Geographic Information System (GIS) from the US National Library of Medicine (NLM) that uses maps of the United States to help users visually explore data from the US Environmental Protection Agency (EPA)'s Toxics Release Inventory (TRI) and Superfund Program.

  16. Relation between psoriasis and geographic tongue.

    PubMed

    Tarakji, Bassel; Umair, Ayesha; Babaker, Zynab; Sn, Azzeghaiby; Gazal, Giath; Sarraj, Faysal

    2014-11-01

    The aim this article is to investigate the link between geographic tongue and psoriasis skin disease. Our review paper of the literature will handle strict study about the relation between geographic tongue and psoriasis. Our search has identified only limited studies available in English written literature starting from 2006-2013 using pubMed - indexed for MEDLINE. The result of this review suggests that geographic tongue may be an oral manifestation of psoriasis.There is no clear evidence in literature about association with gender and aetiology except one study which shows that benign migratory glossitis is more prevalent in young, nonsmoker and atopic or allergic individuals. Treatment for oral lesions is not standardized. A geographic tongue is significantly more frequent in psoriatic patients but only a limited data is available to date to strongly validate the association between these two entities.We recommend the general practitioner to have a good understanding about the clinical presentation, pathogenesis, diagnosis and treatment of this lesion. Psoriatic patients should be encouraged to undergo routine dental checkups. PMID:25584342

  17. Geographical distribution of observational activities for astronomy

    NASA Astrophysics Data System (ADS)

    Heck, A.

    1998-06-01

    The geographical distribution of astronomy-related observational activities is illustrated from comprehensive and up-to-date samples of professional institutions, of public observatories and planetariums, and of associations. Results are commented and, in particular, the lack of evolution over the past century in the overall distribution is pointed at as an alarming indicator.

  18. Network Reliability With Geographically Correlated Failures

    Microsoft Academic Search

    Sebastian Neumayer; Eytan Modiano

    2010-01-01

    Fiber-optic networks are vulnerable to natural dis- asters, such as tornadoes or earthquakes, as well as to physical failures, such as an anchor cutting underwater fiber cables. Such real-world events occur in specific geographical locations and disrupt specific parts of the network. Therefore, the geography of the network determines the effect of physical events on the network's connectivity and capacity.

  19. Enhancing Geographic Learning and Literacy through Filmmaking

    ERIC Educational Resources Information Center

    Dando, Christina E.; Chadwick, Jacob J.

    2014-01-01

    In this media-saturated society, students need to think more critically about the media they encounter and that they are producing. Through filmmaking, students can link geographic theory and the real world, bridging the distance from readings/lectures/discussions to the geography on the ground, making the abstract concrete. But constructing films…

  20. Geographic Information System Resources to Support

    E-print Network

    Geographic Information System Resources to Support Biomass/Bioenergy/Biofuel Decision Making Hawaii Natural Energy Institute Abstract The Hawaii Natural Energy Institute assessed potential biomass/bioenergy/biofuel for both sugar and fiber, and algae for oil or other intermediate products. The objective of this report

  1. A new quality of geographical knowledge

    Microsoft Academic Search

    A. N. Antipov

    2009-01-01

    This paper is concerned with the current tendencies of the advancement of science, primarily as regards integration and synthesis of knowledge of territorial organization. Within this context, the focus is on the principles of developing an understanding of partial systems, the advancement of research in the field of paleoreconstructions and geographical forecasting, novel techniques of landscape and atlas mapping, and

  2. Representing Historical Knowledge in Geographic Information Systems

    ERIC Educational Resources Information Center

    Grossner, Karl Eric

    2010-01-01

    A growing number of historical scholars in social science and humanities fields are using geographic information systems (GIS) to help investigate spatial questions and map their findings. The nature of historical data and historiographic practices present several challenges in using GIS that have been addressed only partially to date. For…

  3. Process Management for Geographical Information Systems Development

    Microsoft Academic Search

    Stephen G. MacDonell

    The controlled management of software processes, an area of ongoing research in the business systems domain, is equally important in the development of geographical information systems (GIS). Appropriate software processes must be defined, used and managed in order to ensure that, as much as possible, systems are developed to quality standards on time and within budget. However, specific characteristics of

  4. GeoCast—geographic addressing and routing

    Microsoft Academic Search

    Julio C. Navas; Tomasz Imielinski

    1997-01-01

    In the near future GPS will be widely used, thus al- lowing a broad variety of location dependent services such as direction giving, navigation, etc. In this pa- per we propose and evaluate a Touting and address- ing method to integrate geographic coordinates into the Internet Protocol to enable the creation of lo- cation dependent services. The main challenge is

  5. Maximum entropy modeling of species geographic distributions

    Microsoft Academic Search

    Steven J. Phillips; Robert P. Anderson; Robert E. Schapire

    2006-01-01

    The availability of detailed environmental data, together with inexpensive and powerful computers, has fueled a rapid increase in predictive modeling of species environmental requirements and geographic distributions. For some species, detailed presence\\/absence occurrence data are available, allowing the use of a variety of standard statistical techniques. However, absence data are not available for most species. In this paper, we introduce

  6. Long Island Geographic Information System (LI GIS)

    Cancer.gov

    The Geographic Information System for Breast Cancer Studies on Long Island (LI GIS) is a unique research tool combining an extensive collection of data and other geospatial resources. The LI GIS is designed primarily to study potential relationships between environmental exposures and breast cancer in Nassau and Suffolk counties (Long Island), NY; however, its application can be extended to the study of other diseases.

  7. Geographic Information Revision Based on Constraints

    Microsoft Academic Search

    Mahat Khelfallah; Belaid Benhamou

    2004-01-01

    Information usually has many sources and is often in- complete and \\/ or uncertain, this leads to many inconsistencies. Revi- sion is the operation which consists in identifying these inconsisten- cies and then in removing them by changing a minimum of informa- tion. In this paper, we are interested in geographic information revi- sion in the framework of a flooding

  8. Filling in the Geographic "Mental Map."

    ERIC Educational Resources Information Center

    Gritzner, Charles F.

    1986-01-01

    Models the creation of a complex mental geographic map to illustrate the geography teacher's instructional task to students. Cites 12 elements of a well-organized geography course that emphasizes spatial analysis, synthesis, and explanation of features and patterns that give geography its uniqueness among social science disciplines. (TRS)

  9. 166 / GeographicalAnalysis LITERATURE CITED

    E-print Network

    Detwiler, Russell

    ,and the manner in which they are channeled into particular time-space paths through the analysis of daily travel-geographic dimension of complex travel patterns (Hagerstrand 1973; Cullen and Godson 1975; Lenntorp 1976; Burns, 1979 Regional Science Association 24, Pumain, D., and T. Saint-Julien (1978). Les Dimensions du Chngement Urbain

  10. A digital library for geographically referenced materials

    Microsoft Academic Search

    Terence R. Smith

    1996-01-01

    Presently, maps, aerial photos, and other material referenced in geographic terms, such as by the names of communities that appear in the material, are largely inaccessible. Much of the information is only on paper or film, and can be found only in major research libraries. There is a need to make such material more widely available. The goal of the

  11. Frontiers in Geographical Teaching. Second Edition.

    ERIC Educational Resources Information Center

    Chorley, Richard J., Ed.; Haggett, Peter, Ed.

    Composed of three parts, "Concepts,""Techniques," and "Teaching," this volume of essays by British geographers emerged from the editors' geography education courses and symposia at Cambridge University. It is addressed to two questions: what is happening in geography? and, what impact does this have on school geography? "Concepts" has seven essays…

  12. GEOGRAPHICAL AND TEMPORAL VISUALISATION OF SOCIAL RELATIONSHIPS

    Microsoft Academic Search

    Majigsuren Enkhsaikhan; Wei Liu; Mark Reynolds

    2008-01-01

    Knowledge discovery from large data collection is increasingly important for knowledge-intensive information systems. In addition, effective visualisation are vital for understanding the knowledge embedded in the data. This paper aims to identify specific named entities from structured text content and visualise them in terms of social relations and geographical locations. The system presented here retrieves author information from publication data,

  13. EXPERIENTIAL AND FORMAL MODELS OF GEOGRAPHIC SPACE

    Microsoft Academic Search

    David M. Mark; Andrew U. Frank

    1990-01-01

    This paper is concerned not with space and spatial relations as objective entities of the world, but rather with human experience and perception of phenomena and relations in space. The goal arising from this concern is to identify models of space that can be used both in cognitive science and in the design and implementation of geographic information systems (GISs).

  14. Inferring Geographic Isolation of Wolverines in California

    Microsoft Academic Search

    Delineating a species' geographic range using the spatial distribution of museum specimens or even contemporary detection- non-detection data can be difficult. This is particularly true at the periphery of a species range where species' distributions are often disjunct. Wolverines (Gulo gulo) are wide-ranging mammals with discontinuous and potentially isolated populations at the periphery of their range. One potentially disjunct population

  15. NATIONAL CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS

    E-print Network

    California at Santa Barbara, University of

    been described by Abler (International Journal of Geographical Information Systems 1: 303-326 (1987. Two major new research initiatives were begun, on GIS and Society: The Social Implications of How, economic and institutional issues arising from the use of GIS technology. In addition to research

  16. ECOLOGICAL RESEARCH APPLICATIONS OF GEOGRAPHIC INFORMATION SYSTEMS

    EPA Science Inventory

    Although the importance of Geographic Information Systems (GISs) in natural resource management has been widely acknowledged, the potential of GlS as an ecological research tool has just begun to be explored. The establishment of a major GIS facility at the University of Minnesot...

  17. Geographic Profile of Employment and Unemployment, 1999

    NSDL National Science Digital Library

    2001-01-01

    Released last week, the Bureau of Labor Statistics' (BLS) Geographic Profile of Employment and Unemployment, 1999 presents 28 tables of employment and unemployment data from two sources, the Census Bureau's Current Population Survey (CPS) and the Local Area Unemployment Statistics (LAUS) program. The 159-page report may be downloaded in its entirety or by table in .pdf format.

  18. Comprehensive Education Bolivarian-Style: The Alternative School in Barrio Pueblo Nuevo, Venezuela

    ERIC Educational Resources Information Center

    Cole, Mike

    2014-01-01

    In this article, the author traces revolutionary developments in an alternative school in Barrio Pueblo Nuevo, Mérida, in the Bolivarian Republic of Venezuela, a school that caters for students between 4 and 14. He begins by recounting some fieldwork done at the school on his behalf by Edward Ellis in 2010. He goes on to discuss a video made at…

  19. An Innovative Project in Educational Technology: The Panama-Venezuela Project.

    ERIC Educational Resources Information Center

    Rojas, Alicia Mabel

    1980-01-01

    Describes a project which is being implemented in the field of educational technology in Panama and Venezuela. The project emphasizes inservice training of a cadre of professionals who will direct efforts to identify and resolve significant problems in education. (Author/CHC)

  20. Five Years of Cyclotron Radioisotope Production Experiences at the First PET-CT in Venezuela

    SciTech Connect

    Colmenter, L.; Coelho, D.; Esteves, L. M.; Ruiz, N.; Morales, L.; Lugo, I. [Centro Diagnostico Docente, Las Mercedes, Caracas (Venezuela); Sajo-Bohus, L.; Liendo, J. A.; Greaves, E. D.; Barros, H. [Universidad Simon Bolivar, Seccion de Fisica Nuclear, Caracas (Venezuela); Castillo, J. [University of Applied Science of Aachen (Germany)

    2007-10-26

    Five years operation of a compact cyclotron installed at PET-CT facility in Caracas, Venezuela is given. Production rate of {sup 18}F labeled FDG, operation and radiation monitoring experience are included. We conclude that {sup 18}FDG CT-PET is the most effective technique for patient diagnosis.

  1. The Cost Analysis of Learning at a Distance: Venezuela's Universidad Nacional Abierta.

    ERIC Educational Resources Information Center

    Rumble, Greville

    1982-01-01

    Examines the cost structure and future system costs of Venezuela's Universidad Nacional Abierta, compares them with the costs of other distance universities, and discusses the cost implications of media choice, size of program, and number of students. The usefulness of cost analysis and projection for decision making is also discussed. (EAO)

  2. Decentralization and Regionalization in Educational Administration: Comparisons of Venezuela, Colombia and Spain.

    ERIC Educational Resources Information Center

    Hanson, E. Mark

    A nation's transition from dictatorship to democracy generally involves institutional reform attempts with new priorities serving a wider range of people and goals. This study describes and compares the goals, means, and outcomes of administrative reforms in the public educational systems of three Hispanic nations (Venezuela, Colombia, and Spain).…

  3. 3D seismic interpretation-Norte de Paria, offshore Eastern Venezuela

    Microsoft Academic Search

    R. Ramirez de Arellano; L. van Bommel; F. Riart; J. Gil

    1993-01-01

    During 1991 a 1600 km[sup 2] 3D seismic survey was acquired for the Cristobal Colon Project, a joint venture of Lagoven (33%), Shell (30%), Exxon (29%) and Mitsubishi (8%). The objective is to evaluate the volumes of gas in the Mejillones, Patao, Dragon, and Rio Caribe gas fields, located north of the Paria Peninsula in offshore eastern Venezuela, in order

  4. Agricultural Education Needs of Farmers in Santa Barbara County, Venezuela. Summary of Research 59.

    ERIC Educational Resources Information Center

    Rodriguez, Juan F.; Henderson, Janet L.

    A study identified the perceived agricultural education needs of farmers in Santa Barbara County, Venezuela and determined the extension teaching techniques most preferred by the farmers as well as the most suitable time of the year and preferred location for receiving technical training. Data were collected from 276 farmers through face-to-face…

  5. Canales de mercadeo y comercialización del producto cárnico ovino ( Ovis aries ) en el estado Lara, Venezuela

    Microsoft Academic Search

    Ramón D'Aubeterre; Aleyda Delgado; Wilmer J. Armas; Mónica Rueda

    The main objective of this paper is to identify the different channels of commercialization of the she ep meat product in Lara state, Venezuela. Twelve years of s ystematic information is presented. This informatio n was taken among sheep farmers, intermediaries, industri als, retailers, consumers, and government agencies. Surveys were applied to the different actors related to the commercialization and

  6. Changes in soil properties and vegetation characteristics along a forest-savanna gradient in southern Venezuela

    Microsoft Academic Search

    Nelda Dezzeo; Noemí Chacón; Elio Sanoja; Gabriel Picón

    2004-01-01

    Vegetation cover in the Gran Sabana highlands (southern Venezuela) appears as a complex mosaic of tall to low forests, bush vegetation and savannas. In this study we described the changes in structure and floristic composition along a forest-savanna gradient consisted of tall forest (TF), medium forest (MF), low forest (LF) and open savanna (S), and analyse the possible reasons for

  7. Floristic composition, plant species abundance, and soil properties of montane savannas in the Gran Sabana, Venezuela

    Microsoft Academic Search

    Nelson Ramírez; Nelda Dezzeo; Noemí Chacón

    2007-01-01

    Floristic composition, species abundance, and soil properties were studied in slope, flat and disturbed savannas in the northern part of the Gran Sabana, Venezuela. All savannas presented shallow soils (<30cm depth) with high content of sand and low content of clay. In general, the soils were poor in nutrients and strongly acidified. The major difference between the soils was the

  8. Different methodologies for obtaining a permeability distribution in the Misoa Formation, Venezuela

    E-print Network

    Garcia, Ivette

    1998-01-01

    of Block V in Lake Maracaibo, Venezuela. The VLE-1 96 area has production from the B, C2, C3, C4 and C5 reservoirs. The data from logs, cores, well tests and production are plentiful, but these data have never been correlated in an effort to compute...

  9. POTENTIAL EFFECTS OF GLOBAL CLIMATIC CHANGE ON THE PHENOLOGY AND YIELD OF MAIZE IN VENEZUELA *

    E-print Network

    Robock, Alan

    , induced by an enhanced green- house effect and by Amazoniandeforestation, on the phenology and yieldPOTENTIAL EFFECTS OF GLOBAL CLIMATIC CHANGE ON THE PHENOLOGY AND YIELD OF MAIZE IN VENEZUELA and another with lower than average rainfall. Scenarios associated with the greenhouse effect cause a decrease

  10. Mansonella ozzardi infections in Indians of the Southwestern part of the state of Bolivar, Venezuela.

    PubMed

    Godoy, G A; Volcan, G; Medrano, C; Teixeira, A; Matheus, L

    1980-05-01

    Mansonella ozzardi infections were found in 80/139 (58%) of Indians living in the forest of the upper Caura River Basin located in the southwestern part of Bolivar State, Venezuela. In four (3%) of the blood samples a second type of microfilaria which could not be identified was also found. PMID:6992608

  11. POPULISMO E IDENTIDADES SOCIALES EN VENEZUELA: LA CONSTRUCCION DEL ORDEN POLITICO

    Microsoft Academic Search

    Luis Ricardo Dávila

    The article seeks to outline the main elements through which a populist political order was built in Venezuela (1945-1948). It will be argued that the constitution of populist politics meant a very important form to articulate new social identities. Then it will turn to the latter Pérez and Caldera showing the basic schemes to reconstitute politics and reshape collective identities

  12. Serological prevalence of Babesia caballi and Theileria equi in horses of Lara State, Venezuela

    Microsoft Academic Search

    Franklin F. Mujica; Trina Perrone; María Forlano; Alfredo Coronado; Roy D. Meléndez; Nailuj Barrios; Rafael Álvarez; Fernando Granda

    2011-01-01

    The main objective of this study was to demonstrate the occurrence of equine piroplasmosis (EP) in horses of Lara State, Venezuela, and to correlate it with the factors host's sex and age in order to know the epidemiology of this disease at the Venezuelan Centroccidental Region. Antibody levels to Babesia caballi and Theileria equi were assessed in 360 equine serum

  13. LA PESQUERÍA DEL CANGREJO Callinectes sapidus (DECAPODA: BRACHYURA) EN EL LAGO DE MARACAIBO, VENEZUELA

    Microsoft Academic Search

    Leonidas Villasmil; Jeremy Mendoza

    2001-01-01

    SUMMARY The blue crab Callinectes sapidus fishery in Maracaibo Lake, Venezuela is described and the stock is assessed by biom- ass dynamic models. This fishery is regionally important due to the number of jobs created in resource extraction and process- ing and export earnings obtained. Catch in metric tons and catch per unit of effort (CPUE) in kg\\/trap cover the

  14. Modern climate forcing of terrigenous deposition in the tropics (Cariaco Basin, Venezuela)

    Microsoft Academic Search

    Nahysa C. Martinez; R. W. Murray; Robert C. Thunell; Larry C. Peterson; Frank Muller-Karger; Yrene Astor; Ramon Varela

    2007-01-01

    One approach to deciphering tropical Quaternary paleoclimate records has been to study the composition of terrigenous material in order to infer past changes in hydrologic and atmospheric conditions. Here we present the inorganic geochemistry (major and trace elements) of modern sediment traps and shelf sediments in the tropical Cariaco Basin, Venezuela, in order to characterize seasonal variation in deposition of

  15. Rural Development in Venezuela and the Guianas: A Bibliography. Training and Methods Series Number 20.

    ERIC Educational Resources Information Center

    Anderson, Teresa, Comp.; And Others

    The bibliography cites 930 materials dealing with Venezuela and the Guianas. Published between 1949 and 1972, the materials are found in the Land Tenure Center Library at the University of Wisconsin. Topics covered are: agriculture, agrarian reform, economic affairs, economic cooperation, human resources, American Indians, industry, law, money,…

  16. Seismic hazard analysis of western Venezuela methodology and data collection process

    Microsoft Academic Search

    Jean Savy

    1988-01-01

    This project, initiated by INTEVEP, develops a seismic hazard characterization for the region of the Lake Maracaibo basin in Western Venezuela (WV) with an emphasis at the sites of dikes built on the eastern side of the lake. One task of the project was to assess the seismicity of this region and to describe it in a form which can

  17. Accelerated Publications Three-Dimensional Structure of DesVI from Streptomyces Venezuelae: A Sugar

    E-print Network

    Holden, Hazel

    Accelerated Publications Three-Dimensional Structure of DesVI from Streptomyces Venezuelae: A Sugar,4,6-trideoxyglucose, is an unusual sugar found on the macrolide antibiotic erythromycin, and it has been shown to play, has been modeled into the active site. This model places the C-6 methyl group of the sugar

  18. Micrometeorological conditions and canopy energy exchanges of a neotropical rain forest (Surumoni-Crane Project, Venezuela)

    Microsoft Academic Search

    Jörg Szarzynski; Dieter Anhuf

    2001-01-01

    Vertical profiles of air temperature, humidity, wind speed and photosynthetically active radiation were examined systematically within and above a primary Amazonian rain forest in Southern Venezuela. During daylight hours the observed gradients of temperature and humidity suggest that turbulent mixing between vegetation and the atmosphere is reasonably efficient in the top two-thirds of the forest, whereas the understorey remains partially

  19. Ecology of the coporo, Prochilodus mariae (Characiformes, Prochilodontidae), and status of annual migrations in western Venezuela

    Microsoft Academic Search

    Aniello Barbarino Duque; Donald C. Taphorn; Kirk O. Winemiller

    1998-01-01

    Deforestation, overfishing, pollution, and construction of dams have severely impacted migratory fishes of western Venezuela. The coporo, Prochilodus mariae (Prochilodontidae), has supported the largest commercial fishery among the species that have seasonal long-distance migrations between rivers of the Andean piedmont and the llanos floodplains. During the period July 1988 to November 1990, coporo ecology was studied in the Río Boconó

  20. [Cities and oil. Historical and prospective aspects of the urban population of Venezuela].

    PubMed

    Papail, J; Picquet, M

    1989-01-01

    The authors present a historical overview of urbanization in Venezuela. The impact of the oil economy on population change and spatial distribution is emphasized. A typology of cities based on socioeconomic function and on a demographic classification of urban centers is devised. Future trends in urbanization are also considered. (SUMMARY IN ENG) PMID:12342497

  1. Geographic exposure modeling: a valuable extension of geographic information systems for use in environmental epidemiology.

    PubMed Central

    Beyea, J

    1999-01-01

    Geographic modeling of individual exposures using air pollution modeling techniques can help in both the design of environmental epidemiologic studies and in the assignment of measures that delineate regions that receive the highest exposure in space and time. Geographic modeling can help in the interpretation of environmental sampling data associated with airborne concentration or deposition, and can act as a sophisticated interpolator for such data, allowing values to be assigned to locations between points where the data have actually been collected. Recent advances allow for quantification of the uncertainty in a geographic model and the resulting impact on estimates of association, variability, and study power. In this paper we present the terminology and methodology of geographic modeling, describe applications to date in the field of epidemiology, and evaluate the potential of this relatively new tool. PMID:10229717

  2. [Resources and geographical distribution of Ganodermataceae in Guizhou province].

    PubMed

    Zhong, J; He, S

    1997-12-01

    This paper reports the geographical distribution and medicinal value of 30 species of Ganodermataceae produced in Guizhou Province. Of these 30 species one is newly discovered and 18 are expounded in respect to their geographical distribution. PMID:11243165

  3. Geographic dispersion in teams : its history, experience, measurement, and change

    E-print Network

    O'Leary, Michael Boyer, 1969-

    2002-01-01

    This thesis begins with the simple argument that geographic dispersion has gone surprisingly unexamined despite its role as the domain-defining construct for geographically dispersed teams (a.k.a. "virtual teams"). The ...

  4. 47 CFR 27.15 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.15 Section...27.15 Geographic partitioning and spectrum disaggregation. (a) Eligibility...service area or disaggregate their licensed spectrum at any time following the grant of...

  5. 47 CFR 27.15 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.15 Section...27.15 Geographic partitioning and spectrum disaggregation. (a) Eligibility...service area or disaggregate their licensed spectrum at any time following the grant of...

  6. 47 CFR 27.15 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.15 Section...27.15 Geographic partitioning and spectrum disaggregation. Link to an amendment...service area or disaggregate their licensed spectrum at any time following the grant of...

  7. 47 CFR 27.15 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.15 Section...27.15 Geographic partitioning and spectrum disaggregation. (a) Eligibility...service area or disaggregate their licensed spectrum at any time following the grant of...

  8. 47 CFR 27.15 - Geographic partitioning and spectrum disaggregation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... false Geographic partitioning and spectrum disaggregation. 27.15 Section...27.15 Geographic partitioning and spectrum disaggregation. (a) Eligibility...service area or disaggregate their licensed spectrum at any time following the grant of...

  9. 33 CFR 169.10 - What geographic coordinates are used?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...unless such geographic coordinates are expressly labeled NAD 83. Geographic coordinates without the NAD 83 reference may be plotted on maps or charts referenced to NAD 83 only after application of the appropriate corrections that are published on the...

  10. Geographic potential for outbreaks of Marburg hemorrhagic fever

    E-print Network

    Peterson, A. Townsend; Lash, R. Ryan; Carroll, Darin S.; Johnson, Karl M.

    2006-01-01

    Marburg virus represents one of the least well-known of the hemorrhagic fever-causing viruses worldwide; in particular, its geographic potential in Africa remains quite mysterious. Ecologic niche modeling was used to explore the geographic...

  11. Seismic microzoning projects and their implementation in Venezuela

    NASA Astrophysics Data System (ADS)

    Schmitz, M.; Cano, V.; Olbrich, F.; Vallee, M.; Morales, C.; Arreaza, A.; Mendes, K.; Klarica, S.; Alvarez Gomez, J.; Aray, J.; Vielma, J.; Pombo, A.; Diaz, J.; Grupo de trabajo

    2013-05-01

    Site effects have been recognized to play an important role in damage distribution of destructive earthquakes. These effects have been observed in Venezuela especially during the 1967 Caracas earthquake, when 4 buildings with 10 and more storeys during the Caracas 1967 earthquake collapsed, and a big number of them in the same deep sediment area have been seriously damaged. This motivated the development of studies regarding the subsurface configuration of Caracas and Barquisimeto during the last decade, with a seismic microzoning project realized in both cities from 2005 to 2009. The main results of this project were the development of design response spectra for the different microzones within the sedimentary basin, as well as estimates of landslide hazard. Implementation of the results in municipality ordinances is actually discussed with local authorities. They are aimed to address mitigation for new constructions by the application of the specific design spectra, for existing buildings via evaluation and retrofitting strategies, and for slope areas (informal, as well as formal developments) due to the identification of areas that may not be developed or require detailed studies of slope stabilities. Since then, seismic microzoning studies were started in Cumaná, Guarenas/Guatire and Lara state, and within a broader context of integrated risk management, which includes flooding, landslide and technological risks, in Mérida, Valencia, Maracay, Barcelona/Puerto La Cruz and Valle de la Pascua. The projects are coordinated by the Venezuelan Foundation for Seismological Research (FUNVISIS) in cooperation with local universities. Efforts are done to unable local researchers to apply the methodologies in other cities as Valera, Trujillo, Boconó, San Cristóbal and Tucacas. A unified seismic hazard map as input motion to these studies is actually in development. Depending on the local characteristics, building inventory and vulnerability analysis are done for risk analysis. Further members of the "Grupo de trabajo: Investigaciones aplicadas a la gestion integral del riesgo en espacios urbanos" are: Oscar Andrés López, Milgreya Cerrada, Rafael Torres, Oscar Ramírez, Elieser Sanzonetti, José Heredia, Jaime Avendaño, Fernando Mazuera, Luis Molina, Alexi Suárez, Víctor Rocabado, Mónica Paolini, Luis Yegres, Leonardo Alvarado, Herbert Rendón, Luz Rodríguez, Jorge González.

  12. Holocene evolution of the western Orinoco Delta, Venezuela

    USGS Publications Warehouse

    Aslan, A.; White, W.A.; Warne, A.G.; Guevara, E.H.

    2003-01-01

    The pristine nature of the Orinoco Delta of eastern Venezuela provides unique opportunities to study the geologic processes and environments of a major tropical delta. Remote-sensing images, shallow cores, and radiocarbon-dating of organic remains form the basis for describing deltaic environments and interpreting the Holocene history of the delta. The Orinoco Delta can be subdivided into two major sectors. The southeast sector is dominated by the Rio Grande-the principal distributary-and complex networks of anastomosing fluvial and tidal channels. The abundance of siliciclastic deposits suggests that fluvial processes such as over-bank flooding strongly influence this part of the delta. In contrast, the northwest sector is represented by few major distributaries, and overbank sedimentation is less widespread relative to the southeast sector. Peat is abundant and occurs in herbaceous and forested swamps that are individually up to 200 km2 in area. Northwest-directed littoral currents transport large volumes of suspended sediment and produce prominent mudcapes along the northwest coast. Mapping of surface sediments, vegetation, and major landforms identified four principal geomorphic systems within the western delta plain: (1) distributary channels, (2) interdistributary flood basins, (3) fluvial-marine transitional environments, and (4) marine-influenced coastal environments. Coring and radiocarbon dating of deltaic deposits show that the northern delta shoreline has prograded 20-30 km during the late Holocene sea-level highstand. Progradation has been accomplished by a combination of distributary avulsion and mudcape progradation. This style of deltaic progradation differs markedly from other deltas such as the Mississippi where distributary avulsion leads to coastal land loss, rather than shoreline progradation. The key difference is that the Orinoco Delta coastal zone receives prodigious amounts of sediment from northwest-moving littoral currents that transport sediment from as far away as the Amazon system (???1600 km). Late Holocene progradation of the delta has decreased delta-plain gradients, increased water levels, and minimized over-bank flooding and siliciclastic sedimentation in the northwest sector. These conditions, coupled with large amounts of direct precipitation, have led to widespread peat accumulation in interdistributary basins. Because peat-forming environments cover up to 5000 km2 of the delta plain, the Orinoco may be an excellent analogue for interpreting ancient deltaic peat deposits.

  13. ERBE Geographic Scene and Monthly Snow Data

    NASA Technical Reports Server (NTRS)

    Coleman, Lisa H.; Flug, Beth T.; Gupta, Shalini; Kizer, Edward A.; Robbins, John L.

    1997-01-01

    The Earth Radiation Budget Experiment (ERBE) is a multisatellite system designed to measure the Earth's radiation budget. The ERBE data processing system consists of several software packages or sub-systems, each designed to perform a particular task. The primary task of the Inversion Subsystem is to reduce satellite altitude radiances to fluxes at the top of the Earth's atmosphere. To accomplish this, angular distribution models (ADM's) are required. These ADM's are a function of viewing and solar geometry and of the scene type as determined by the ERBE scene identification algorithm which is a part of the Inversion Subsystem. The Inversion Subsystem utilizes 12 scene types which are determined by the ERBE scene identification algorithm. The scene type is found by combining the most probable cloud cover, which is determined statistically by the scene identification algorithm, with the underlying geographic scene type. This Contractor Report describes how the geographic scene type is determined on a monthly basis.

  14. Ethics and geographical equity in health care

    PubMed Central

    Rice, N.; Smith, P.

    2001-01-01

    Important variations in access to health care and health outcomes are associated with geography, giving rise to profound ethical concerns. This paper discusses the consequences of such concerns for the allocation of health care finance to geographical regions. Specifically, it examines the ethical drivers underlying capitation systems, which have become the principal method of allocating health care finance to regions in most countries. Although most capitation systems are based on empirical models of health care expenditure, there is much debate about which needs factors to include in (or exclude from) such models. This concern with legitimate and illegitimate drivers of health care expenditure reflects the ethical concerns underlying the geographical distribution of health care finance. Key Words: Health economics • resource allocation • ethics of regional health care finance • capitation systems PMID:11479357

  15. Book Review: "Educational Reform and Administrative Development: The Cases of Columbia and Venezuela," by E. Mark Hanson.

    ERIC Educational Resources Information Center

    Lynch, Patrick D.

    1988-01-01

    Reviews "Educational Reform and Administrative Development: The Cases of Colombia and Venezuela," by E. Mark Hanson, which relates the policy-making and administrative structures of these two countries to their political, historical, and cultural contexts. (TE)

  16. Risk prevention and policy formulation : responding to the 1999 mud-floods catastrophe in El Litoral Central, Venezuela

    E-print Network

    Parisca-Blanco, Sonia

    2005-01-01

    Fifteen days of constant and intense rainfall in Venezuela culminated on December 16 1999, in catastrophic landslides and flooding along 25 miles of the Vargas State coastal strip. This catastrophe ravaged the Caracas ...

  17. NCI Map Stories - Geographic Information Systems & Science

    Cancer.gov

    Colorectal Cancer shows incidence, mortality, and screening rate maps for the most recent colorectal cancer statistics. This map story has been released in conjunction with Colorectal Cancer Awareness Month (March 2015). The data was sourced from the State Cancer Profiles website which the NCI and CDC collaborate on. The user can view one map at a time using tabs. Additionally, the user can download the data in tabular, geographic, or PDF format. To see the county layer, zoom in on the map.

  18. Geographic information system based manure application plan

    Microsoft Academic Search

    Badri B. Basnet; Armando A. Apan; Steven R. Raine

    2002-01-01

    A geographic information system (GIS) based manure application plan has been developed for the site-specific application of animal waste to agricultural fields in the Westbrook sub-catchment of the Murray-Darling Basin, south-east Queensland, Australia. Sites suitable for animal waste application were identified using a GIS based weighted linear combination (WLC) model. The degree of land suitability for animal waste application was

  19. Geographic location tags on digital images

    Microsoft Academic Search

    Kentaro Toyama; Ron Logan; Asta Roseway

    2003-01-01

    We describe an end-to-end system that capitalizes on geographic location tags for digital photographs. The World Wide Media eXchange (WWMX) database indexes large collections of image media by several pieces of metadata including timestamp, owner, and critically, location stamp. The location where a photo was shot is important because it says much about its semantic content, while being relatively easy

  20. Geographical information system for flight safety

    Microsoft Academic Search

    Hiromichi Yamamoto; Kohzo Homma; Hiromi Gomi; Satoru Kitagata; Kazuhiro Kumasaka; Tetsuya Oikawa

    2003-01-01

    This paper proposes a geographical information system for terrain and obstacle awareness and alerting that extracts information from high-resolution satellite images. On-board terrain elevation databases are being increasingly used in aircraft terrain awareness and warning systems (TAWS), offering a step change in capability from the radar altimeter-based ground proximity warning system. However, to enhance the safety of flight of small

  1. U-PLANT GEOGRAPHIC ZONE CLEANUP PROTOTYPE

    SciTech Connect

    ROMINE, L.D.

    2006-02-01

    The U Plant geographic zone (UPZ) occupies 0.83 square kilometers on the Hanford Site Central Plateau (200 Area). It encompasses the U Plant canyon (221-U Facility), ancillary facilities that supported the canyon, soil waste sites, and underground pipelines. The UPZ cleanup initiative coordinates the cleanup of the major facilities, ancillary facilities, waste sites, and contaminated pipelines (collectively identified as ''cleanup items'') within the geographic zone. The UPZ was selected as a geographic cleanup zone prototype for resolving regulatory, technical, and stakeholder issues and demonstrating cleanup methods for several reasons: most of the area is inactive, sufficient characterization information is available to support decisions, cleanup of the high-risk waste sites will help protect the groundwater, and the zone contains a representative cross-section of the types of cleanup actions that will be required in other geographic zones. The UPZ cleanup demonstrates the first of 22 integrated zone cleanup actions on the Hanford Site Central Plateau to address threats to groundwater, the environment, and human health. The UPZ contains more than 100 individual cleanup items. Cleanup actions in the zone will be undertaken using multiple regulatory processes and decision documents. Cleanup actions will include building demolition, waste site and pipeline excavation, and the construction of multiple, large engineered barriers. In some cases, different cleanup actions may be taken at item locations that are immediately adjacent to each other. The cleanup planning and field activities for each cleanup item must be undertaken in a coordinated and cohesive manner to ensure effective execution of the UPZ cleanup initiative. The UPZ zone cleanup implementation plan (ZCIP) was developed to address the need for a fundamental integration tool for UPZ cleanup. As UPZ cleanup planning and implementation moves forward, the ZCIP is intended to be a living document that will provide a focal point for integrating UPZ actions, including field cleanup activities, waste staging and handling, and post-cleanup monitoring and institutional controls.

  2. Geographic Information Systems and travel health.

    PubMed

    Bauer, Irmgard L; Puotinen, Marji

    2002-01-01

    Questions dealing with space and/or location have always been integral to understanding and addressing health issues, such as charting the spread of a disease. Health researchers have traditionally used paper maps to explore the spatial dimensions of health. However, due to advances in technology, it is now possible to ask such questions using a suite of computer-based methods and tools that are collectively known as a Geographic Information System (GIS). PMID:12962585

  3. Validating a geographical image retrieval system

    Microsoft Academic Search

    Bin Zhu; Hsinchun Chen

    2000-01-01

    This paper summarizes a prototype geographical image retrieval system that demonstrates how to integrate im- age processing and information analysis techniques to support large-scale content-based image retrieval. By using an image as its interface, the prototype system addresses a troublesome aspect of traditional retrieval models, which require users to have complete knowl- edge of the low-level features of an image.

  4. Geographic Analysis of the Radiation Oncology Workforce

    SciTech Connect

    Aneja, Sanjay [Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT (United States); Cancer Outcomes, Policy, and Effectiveness Research Center at Yale, New Haven, CT (United States); Smith, Benjamin D. [University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Gross, Cary P. [Cancer Outcomes, Policy, and Effectiveness Research Center at Yale, New Haven, CT (United States); Department of General Internal Medicine, Yale University School of Medicine, New Haven, CT (United States); Wilson, Lynn D. [Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT (United States); Haffty, Bruce G. [Cancer Institute of New Jersey, New Brunswick, NJ (United States); Roberts, Kenneth [Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT (United States); Yu, James B., E-mail: james.b.yu@yale.edu [Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT (United States); Cancer Outcomes, Policy, and Effectiveness Research Center at Yale, New Haven, CT (United States)

    2012-04-01

    Purpose: To evaluate trends in the geographic distribution of the radiation oncology (RO) workforce. Methods and Materials: We used the 1995 and 2007 versions of the Area Resource File to map the ratio of RO to the population aged 65 years or older (ROR) within different health service areas (HSA) within the United States. We used regression analysis to find associations between population variables and 2007 ROR. We calculated Gini coefficients for ROR to assess the evenness of RO distribution and compared that with primary care physicians and total physicians. Results: There was a 24% increase in the RO workforce from 1995 to 2007. The overall growth in the RO workforce was less than that of primary care or the overall physician workforce. The mean ROR among HSAs increased by more than one radiation oncologist per 100,000 people aged 65 years or older, from 5.08 per 100,000 to 6.16 per 100,000. However, there remained consistent geographic variability concerning RO distribution, specifically affecting the non-metropolitan HSAs. Regression analysis found higher ROR in HSAs that possessed higher education (p = 0.001), higher income (p < 0.001), lower unemployment rates (p < 0.001), and higher minority population (p = 0.022). Gini coefficients showed RO distribution less even than for both primary care physicians and total physicians (0.326 compared with 0.196 and 0.292, respectively). Conclusions: Despite a modest growth in the RO workforce, there exists persistent geographic maldistribution of radiation oncologists allocated along socioeconomic and racial lines. To solve problems surrounding the RO workforce, issues concerning both gross numbers and geographic distribution must be addressed.

  5. Geographical Database Watermarking by Polygon Elongation (Technical Report)

    E-print Network

    Paris-Sud XI, Université de

    , spatial accuracy is not crucial for tourist city maps designers who apply strong transformations to roadGeographical Database Watermarking by Polygon Elongation (Technical Report) Julien Lafaye1 , Jean B geographical databases, with the focus on the buildings layer. Embedded watermarks survive common geographical

  6. Public Participation Geographic Information Systems: A Literature Review and Framework

    E-print Network

    Wright, Dawn Jeannine

    Public Participation Geographic Information Systems: A Literature Review and Framework Renee Sieber Department of Geography, McGill University Public participation geographic information systems (PPGIS) pertains to the use of geographic information sys- tems (GIS) to broaden public involvement in policymaking

  7. GeoVSM: An Integrated Retrieval Model for Geographic Information

    Microsoft Academic Search

    Guoray Cai

    2002-01-01

    Geographical information exists in multiple forms such as cartographical maps, images, and texts. Effective retrieval systems for geographical information are currently studied by both geospatial information scientists and library\\/information scientists. The two groups take quite different approaches which have rarely been explicitly compared and connected. This paper discusses the advantages and limitations of current geographical information retrieval (GIR) and textual

  8. Experimental Evaluation for IPv6 over VANET Geographic routing

    E-print Network

    Paris-Sud XI, Université de

    Experimental Evaluation for IPv6 over VANET Geographic routing Manabu Tsukada INRIA Paris). Geographic routing in vehicular ad hoc network (VANET) is becoming an inter- esting topic to deliver safety the AnaVANET evaluation tool to perform the evaluation taking into account all of geographic factors

  9. Finding Home: Challenges Faced by Geographically Mobile Families

    ERIC Educational Resources Information Center

    Allen, Sarah

    2008-01-01

    This qualitative study explores the dialectical dimensions of home as experienced by geographically mobile couples. Informants (N = 48) defined home as having multiple meanings and locations, with 4 dialectical tensions embedded within their experience. Home was situated between (a) geographic spaces that were here and there, (b) geographic spaces…

  10. Geographic information retrieval: Modeling uncertainty of user's context

    Microsoft Academic Search

    Gloria Bordogna; Giorgio Ghisalberti; Giuseppe Psaila

    Geographic information retrieval (GIR) is nowadays a hot research issue that involves the management of uncertainty and imprecision and the modeling of user preferences and context. Indexing the geographic content of documents implies dealing with the ambiguity, synonymy and homonymy of geographic names in texts. On the other side, the evaluation of queries specifying both content based conditions and spatial

  11. LI GIS: What Is a Geographic Information System (GIS)?

    Cancer.gov

    A geographic information system (GIS) integrates hardware, software, and data for capturing, managing, analyzing, and displaying information with a geographic component. Almost all data has some sort of geographic component associated with it, such as a country, city, address, or latitude and longitude lines.

  12. Importing the US Geographical Survey Data into a Relational DBMS

    E-print Network

    McBrien, Peter

    , detailing major geographical features in the US, such as lakes, cities, etc. · name: the common name: name of the populated place. · type: e.g. lake, ppl, mount · county: name of county in which by the author of certain parts of the data prepared by US Geographical Survey called the (Geographical Names In

  13. Importing the US Geographical Survey Data into a Relational DBMS

    E-print Network

    McBrien, Peter

    , detailing major geographical features in the US, such as lakes, cities, etc. #15; name: the common name. #15; name: name of the populated place. #15; type: e.g. lake, ppl, mount #15; county: name of county by the author of certain parts of the data prepared by US Geographical Survey called the (Geographical Names In

  14. Participatory Comprehensive Plan based on Virtual Geographical Environment

    E-print Network

    Li, Xiang

    and communication technologies, such as geographical information system (GIS), virtual reality (VR), and Internet1 Participatory Comprehensive Plan based on Virtual Geographical Environment Xiang LI* Hui LIN. This paper, introduces Virtual Geographical Environment (VGE) into this field tentatively. VGE, set up

  15. Ontology for cell-based geographic information

    NASA Astrophysics Data System (ADS)

    Zheng, Bin; Huang, Lina; Lu, Xinhai

    2009-10-01

    Inter-operability is a key notion in geographic information science (GIS) for the sharing of geographic information (GI). That requires a seamless translation among different information sources. Ontology is enrolled in GI discovery to settle the semantic conflicts for its natural language appearance and logical hierarchy structure, which are considered to be able to provide better context for both human understanding and machine cognition in describing the location and relationships in the geographic world. However, for the current, most studies on field ontology are deduced from philosophical theme and not applicable for the raster expression in GIS-which is a kind of field-like phenomenon but does not physically coincide to the general concept of philosophical field (mostly comes from the physics concepts). That's why we specifically discuss the cell-based GI ontology in this paper. The discussion starts at the investigation of the physical characteristics of cell-based raster GI. Then, a unified cell-based GI ontology framework for the recognition of the raster objects is introduced, from which a conceptual interface for the connection of the human epistemology and the computer world so called "endurant-occurrant window" is developed for the better raster GI discovery and sharing.

  16. Geographically isolated wetlands: rethinking a misnomer

    USGS Publications Warehouse

    Mushet, David M.; Calhoun, Aram J. K.; Alexander, Laurie C.; Cohen, Matthew J.; DeKeyser, Edward S.; Fowler, Laurie G.; Lane, Charles R.; Lang, Megan W.; Rains, Mark C.; Walls, Susan

    2015-01-01

    We explore the category “geographically isolated wetlands” (GIWs; i.e., wetlands completely surrounded by uplands at the local scale) as used in the wetland sciences. As currently used, the GIW category (1) hampers scientific efforts by obscuring important hydrological and ecological differences among multiple wetland functional types, (2) aggregates wetlands in a manner not reflective of regulatory and management information needs, (3) implies wetlands so described are in some way “isolated,” an often incorrect implication, (4) is inconsistent with more broadly used and accepted concepts of “geographic isolation,” and (5) has injected unnecessary confusion into scientific investigations and discussions. Instead, we suggest other wetland classification systems offer more informative alternatives. For example, hydrogeomorphic (HGM) classes based on well-established scientific definitions account for wetland functional diversity thereby facilitating explorations into questions of connectivity without an a priori designation of “isolation.” Additionally, an HGM-type approach could be used in combination with terms reflective of current regulatory or policymaking needs. For those rare cases in which the condition of being surrounded by uplands is the relevant distinguishing characteristic, use of terminology that does not unnecessarily imply isolation (e.g., “upland embedded wetlands”) would help alleviate much confusion caused by the “geographically isolated wetlands” misnomer.

  17. NOTA TÉCNICA REPRODUCCIÓN DE PECES Y CONSIDERACIÓN DE AMBIENTES EN EVENTOS DE CRECIDAS EN EL RÍO PORTUGUESA, VENEZUELA

    Microsoft Academic Search

    Douglas Rodríguez-Olarte; Christophe Kossowski

    2004-01-01

    Reproduction of fishes in flooding events of Portuguesa River, Venezuela The reproduction of fishes in flooding events in the Portuguesa River, Venezuela, is reported. In the high plainlands (about 100 meter above sea level) and only at specific water speeds (higher than 0.59 m\\/s) eggs presenting embryonic stages between the four-cell-embryo and the phase of independent movement of the embryo

  18. Geology and geomorphology of the Roraima group, southeastern Venezuela

    NASA Astrophysics Data System (ADS)

    Yanezpintado, G.

    A moderately detailed, accurate geologic geomorphologic map of the Roraima region at a 1:250,000 scale was prepared. This provides a suitable base for future, more detailed studies. It is recommended that the Roraima Formation be raised to Group status and include three apparently conformable but lithogically separable Formations from the base upwards, these are the Canaima, Gualaquinima, and Auyantepui formation. Two composite stratigraphic sections are established and formational thicknesses determined near Santa Elena de U. and Canaima. Radar imagery and aerial photo interpretation allows improved mapping of regional and local structures. Broad, gentle, postdepositional folding of the Roraima into anteclises and syneclises apparently was followed by intrusion of basic dikes and sills; the principal host is the Canaima Formation. Diamond bearing places in the present alluvial valleys are the result of continuous deposition, reworking and redeposition of older, more geographically disjunct floodplain and deltaic sediments.

  19. Fundamental problems on scale of geographical information science

    NASA Astrophysics Data System (ADS)

    Liu, Kai; Wu, Hehai; Hu, Jie

    2007-06-01

    Traditionally, the description of the scale of geographical information is mainly concerned with spatiality and its temporal character and semantic character is ignored. With a few of new techniques and way such as 3D geographical information system, temporal geographical information system, virtual geographical environment, electronic map appears, the traditional description of scale of geographical information shows its deficiencies to make certain of every aspect of it. At first, in this paper we try to extend the connotation and the dimension of scale of geographical information to full the need of describing the every aspects of it, and give three-tiered conceptualization of its scale as: kinds of scale; dimensions of scale; components of scale. The dimension of scale of geographical information is consisted of spatial dimension, temporal dimension and semantic dimension. The classifications of scale of geographical information are of phenomena scale, measure scale and token scale. The components of scale of geographical information are of extension, granularity (resolution) and interval. It is through the Cartesian product of kinds of scale and components of scale can we define the particulars of every aspects of scale of geographical information. At last in this paper the transform of scale of geographical information and issue of scale choice is discussed.

  20. Remote sensing research in geographic education: An alternative view

    NASA Technical Reports Server (NTRS)

    Wilson, H.; Cary, T. K.; Goward, S. N.

    1981-01-01

    It is noted that within many geography departments remote sensing is viewed as a mere technique a student should learn in order to carry out true geographic research. This view inhibits both students and faculty from investigation of remotely sensed data as a new source of geographic knowledge that may alter our understanding of the Earth. The tendency is for geographers to accept these new data and analysis techniques from engineers and mathematicians without questioning the accompanying premises. This black-box approach hinders geographic applications of the new remotely sensed data and limits the geographer's contribution to further development of remote sensing observation systems. It is suggested that geographers contribute to the development of remote sensing through pursuit of basic research. This research can be encouraged, particularly among students, by demonstrating the links between geographic theory and remotely sensed observations, encouraging a healthy skepticism concerning the current understanding of these data.

  1. A geographical approach for integrating belief networks and Geographic Information Sciences to probabilistically predict river depth

    NASA Astrophysics Data System (ADS)

    Hopper, Nathan Lee

    Geography is, traditionally, a discipline dedicated to answering complex spatial questions. Although spatial statistical techniques, such as weighted regressions and weighted overlay analyses, are commonplace within geographical sciences, probabilistic reasoning, and uncertainty analyses are not typical. For example, belief networks are statistically robust and computationally powerful, but are not strongly integrated into geographic information systems. This is one of the reasons that belief networks have not been more widely utilized within the environmental sciences community. Geography's traditional method of delivering information through maps provides a mechanism for conveying probabilities and uncertainties to decision makers in a clear, concise manner. This study will couple probabilistic methods with Geographic Information Sciences (GISc), resulting in a practical decision system framework. While the methods for building the decision system in this study are focused on the identification of environmental navigation hazards, the decision system framework concept is not bound by this study and can be applied to other complex environmental questions.

  2. Geographic Information Systems and Web Page Development

    NASA Technical Reports Server (NTRS)

    Reynolds, Justin

    2004-01-01

    The Facilities Engineering and Architectural Branch is responsible for the design and maintenance of buildings, laboratories, and civil structures. In order to improve efficiency and quality, the FEAB has dedicated itself to establishing a data infrastructure based on Geographic Information Systems, GIS. The value of GIS was explained in an article dating back to 1980 entitled "Need for a Multipurpose Cadastre" which stated, "There is a critical need for a better land-information system in the United States to improve land-conveyance procedures, furnish a basis for equitable taxation, and provide much-needed information for resource management and environmental planning." Scientists and engineers both point to GIS as the solution. What is GIS? According to most text books, Geographic Information Systems is a class of software that stores, manages, and analyzes mapable features on, above, or below the surface of the earth. GIS software is basically database management software to the management of spatial data and information. Simply put, Geographic Information Systems manage, analyze, chart, graph, and map spatial information. GIS can be broken down into two main categories, urban GIS and natural resource GIS. Further still, natural resource GIS can be broken down into six sub-categories, agriculture, forestry, wildlife, catchment management, archaeology, and geology/mining. Agriculture GIS has several applications, such as agricultural capability analysis, land conservation, market analysis, or whole farming planning. Forestry GIs can be used for timber assessment and management, harvest scheduling and planning, environmental impact assessment, and pest management. GIS when used in wildlife applications enables the user to assess and manage habitats, identify and track endangered and rare species, and monitor impact assessment.

  3. Six Essential Elements- National Geographic Photograph Activity

    NSDL National Science Digital Library

    Patricia Steed

    2012-08-01

    This lesson is the fourth in a unit of five lessons on the Six Essential Elements of Geography. In this lesson students will apply recently acquired knowledge regarding the Six Essential Elements of Geography. They will utilize National Geographic magazines to find examples of the six Elements and write to explain how the photograph fits the element. First, they will do this activity in groups; groups will each be assigned one Element. Second, students will individually find an example of all six Elements. At the end of the lesson, students will present their work to the class.

  4. NCI GIS Portal - Geographic Information Systems & Science

    Cancer.gov

    NCI GIS Portal is a web-based station for interactive mapping and visualization of cancer related geo-spatial data. The portal combines Geographic Information Systems (GIS) and Science principles and tools to harmonize a relatively large and multi-dimensional datasets, including population-based cancer statistics and behavioral, environmental, clinical, socioeconomic, and policy data at the county and state levels. The tools that comprise GIS Portal combine intelligent web maps with graphs, charts, tables, and text to inform, educate, and inspire users to generate research hypothesis.

  5. Geographical Aspects of Cancer in Tanzania

    PubMed Central

    Alexander, George A.

    1983-01-01

    Cancer is an important cause of morbidity and mortality in Tanzania. According to the Tanzanian Cancer Registry, which records all histologically confirmed malignant tumors, the number of reported cancer cases has increased significantly over the past three decades. The most commonly diagnosed tumors are cervix cancer, skin cancer, primary liver cancer, Kaposi's sarcoma, and Burkitt's lymphoma. Geographical and tribal variations exist in disease frequency. Environmental factors appear to have a major role in the distribution. Through elimination of these factors, cancer in Tanzania could be reduced if not totally prevented. ImagesFigure 3Figure 4Figure 5Figure 6Figure 7Figure 8 PMID:6631988

  6. Greedy connectivity of geographically embedded graphs

    NASA Astrophysics Data System (ADS)

    Sun, Jie; Ben-Avraham, Daniel

    2010-07-01

    We introduce a measure of greedy connectivity for geographical networks (graphs embedded in space) and where the search for connecting paths relies only on local information, such as a node’s location and that of its neighbors. Constraints of this type are common in everyday life applications. Greedy connectivity accounts also for imperfect transmission across established links and is larger the higher the proportion of nodes that can be reached from other nodes with a high probability. Greedy connectivity can be used as a criterion for optimal network design.

  7. Behaviour of the red howler monkey ( Alouatta seniculus ) in the Llanos of Venezuela

    Microsoft Academic Search

    F. Braza; F. Alvarez; T. Azcarate

    1981-01-01

    The behaviour of the red howler monkey (Alouatta seniculus) in the Llanos of Venezuela was studied from May 1975 to May 1976. The average size of the social groups was 6.32.1 individuals.\\u000a The groups were heterosexual, comprising individuals of all ages, with an average of 40% adult females, 26% adult males, 16%\\u000a juveniles and 18% infants. The daily rhythm of

  8. New particle formation events observed at a high altitude site Pico Espejo, Venezuela

    NASA Astrophysics Data System (ADS)

    Nieminen, Tuomo; Kontkanen, Jenni; Krejci, Radovan; Ström, Johan; Tunved, Peter; Hamburger, Thomas; Calderon, Silvia; Hoffman, Pedro

    2013-05-01

    Formation and growth events of nucleation mode particles (10-25 nm in diameter) were analyzed from 27 month period of particle size distribution measurements at the high altitude site Pico Espejo in Venezuela. Particle formation was observed both in air masses connected to boundary layer air and in free tropospheric conditions. The frequency and magnitude of particle formation at this high altitude site was comparable to many observations at lower altitude sites.

  9. Heterologous expression of tylosin polyketide synthase and production of a hybrid bioactive macrolide in Streptomyces venezuelae

    Microsoft Academic Search

    Won Seok Jung; Sang Kil Lee; Jay Sung Joong Hong; Sung Ryeol Park; Soon Jeong Jeong; Ah Reum Han; Jae Kyung Sohng; Byung Gee Kim; Cha Yong Choi; David H. Sherman; Yeo Joon Yoon

    2006-01-01

    Tylosin polyketide synthase (Tyl PKS) was heterologously expressed in an engineered strain of Streptomyces venezuelae bearing a deletion of pikromycin PKS gene cluster using two compatible low-copy plasmids, each under the control of a pikAI promoter. The mutant strain produced 0.5 mg\\/l of the 16-membered ring macrolactone, tylactone, after a 4-day culture, which is a considerably reduced culture period to reach

  10. A social learning approach to the study of intrastate political violence: the case of Venezuela

    E-print Network

    Roberts, Sherman Douglas

    1971-01-01

    Operations Research Off ioe, The American Uni- versity, U. S. Arm Handbook for Venezuela (Washington, D. C. s . . Governmen r n ing ce, 1964 ), p. 321 of Ind. ependence was primarily an internal war. He also provides considerable support... for the contention that most of' tne armed. combat that took place stemmed from preexist- ing social animosities concerning race, personal grudges, family feuds, and simple exploitation of the opportunity for gain, rather than d. eep-seated. ideological loyalty...

  11. Oxygen Isotope Composition of Eclogitic and Peridotitic Garnet Xenocrysts from the La Ceniza Kimberlite, Guaniamo, Venezuela

    Microsoft Academic Search

    Daniel J. Schulze; John W. Valley; Michael J. Spicuzza; Dominic M. De R. Channer

    2003-01-01

    Although diamonds from kimberlites in the Guaniamo region of Venezuela overwhelmingly belong to the eclogite suite, the mantle xenocryst suite is dominated by peridotitic garnets, with a significant harzburgite component. In the 0.5 to 1.0 mm size fraction of heavy mineral concentrate from the La Ceniza kimberlite, approximately 23% of the garnet xenocrysts are classified as G10 (harzburgitic), 75% are

  12. A new species of Piaroa (Schizomida: Hubbardiidae) from Venezuela, with taxonomic notes on the genus.

    PubMed

    M, Osvaldo Villarreal; De Armas, Luis F; García, Luis Fernando

    2014-01-01

    A new species belonging to the schizomid genus Piaroa Villarreal, Giupponi and Tourinho, 2008 is described from north-western Venezuela. A complementary description of Piaroa guipongai Villarreal and Garcia, 2012 is provided including SEM pictures of relevant structures of both sexes. A key for males of Piaroa and Colombiazomus Armas and Delgado-Santa, 2012 is included. The presence of Dm3 setae on Hubbardiidae is discussed. PMID:24870907

  13. Chronology of mercury enrichment factors in reef corals from western Venezuela

    Microsoft Academic Search

    Ruth Ramos; Roberto Cipriani; Hector M. Guzman; Elia García

    2009-01-01

    Mining and deforestation in the early 20th century, the development of petrochemical industries during the 1950s, and the constant weathering of natural deposits of cinabrium (HgS) have made Golfo Triste, Venezuela, a region impacted by mercury (Hg). We studied the chronology of Hg in coral skeletons of Siderastrea siderea (1 colony, 1900–1996) and Montastraea faveolata (2 colonies, 1930–1999) from Parque

  14. Applications of Planktonic foraminifera in the Paleogene of the Eastern Venezuela-Trinidad Basin

    SciTech Connect

    Radford, S. [Department of Geology, Imperial College of Science, Technology and Medicine, London (United Kingdom)

    1996-08-01

    Following increased interest in the petroleum potential of the Eastern Venezuela-Trinidad Basin, a revision of the planktonic foraminifera from the Paleogene was undertaken. The application of evolutionary trends in microperforate, medioperforate and macroperforate lineages for petroleum exploration is assessed. Scanning Electron Microscope illustrations are presented for over 100 taxa currently applied in high resolution biostratigraphy, sequence stratigraphy and paleoceanography of the region. These will allow more rapid and reliable recognition of zones, hiatuses and sequence boundaries.

  15. Distribution, status, and traditional significance of the West Indian manatee Trichechus manatus in Venezuela

    USGS Publications Warehouse

    O'Shea, Thomas J.; Correa-Viana, Martín; Ludlow, Mark E.; Robinson, John G.

    1988-01-01

    Aerial and interview surveys were conducted in 1986 to determine the current distribution, status, and traditional significance of the West Indian manatee Trichechus manatus in Venezuela. Aerial surveys provided just eight tentative sightings in 73 hours of searching. These discouraging results may have been due to poor visibility, small populations, and perhaps reduced dry season manatee activity. Results of interview surveys, however, permitted a number of important generalizations. A remnant manatee population exists in Lake Maracaibo, but none occur along the more than 1500 km of Caribbean coastline. Abundance is greatest in eastern Venezuela bordering the Golfo de Paria, in the Orinoco Delta, and in the middle Orinoco and tributaries. Local market hunting in the middle of this century probably greatly reduced manatee populations in these areas. Recent protection laws, education efforts, and manatee scarcity have resulted in a declining interest in manatee hunting. Much excellent manatee habitat persists in these regions, and a continued decline in hunting could result in an optimistic outlook for future manatee populations if the incidental take in net fisheries is controlled. Traditional beliefs and legends concerning manatees in Venezuela, including hunting taboos, show that these animals remain a colorful part of the folk culture. However, manatee protection does not pose economic hardships or infringe upon traditional spiritual beliefs.

  16. Potential influence of climate variability on dengue incidence registered in a western pediatric Hospital of Venezuela.

    PubMed

    Herrera-Martinez, Aura D; Rodríguez-Morales, Alfonso J

    2010-08-01

    Climate change and variability is affecting human health and disease direct or indirectly through many mechanisms. Dengue is one those diseases that is strongly influenced by climate variability. In this study we assess potential associations between macroclimatic variation and dengue cases in a western pediatric hospital of Venezuela in an eight-year period. Between 2001 and 2008, 7,523 cases of dengue were reported in the Hospital Agustin Zubillaga, Barquisimeto, Venezuela. Climatic periods marked a difference of 23.15% in the mean incidence of cases, from El Niño weeks (-14.16% of cases below the mean incidence) to La Niña months (+8.99% of cases above it) (p=0.0001). Linear regression showed significantly higher dengue incidence with lower values of Oceanic Niño Index (ONI) (El Niño periods) and lower dengue incidence with higher values of ONI (La Niña periods) (p=0.0002). As has been shown herein, climate variability is an important element influencing the dengue epidemiology in Venezuela. However, it is necessary to extend these studies in this and other countries in the region, because these models can be applied for surveillance as well for prediction of dengue. PMID:20962726

  17. Wood anatomy of tribe Detarieae and comparison with tribe Caesalpinieae (Leguminosae, Caesalpinioideae) in Venezuela.

    PubMed

    Melandri, José Luis; de Pernía, Narcisana Espinoza

    2009-01-01

    We studied the wood anatomy of 29 species belonging to 10 genera of the tribe Detarieae, subfamily Caesalpinioideae and compare them with tribe Caesalpinieae. Detarieae is the largest of four tribes of Caesalpinioideae, with 84 genera, only eleven occur in Venezuela with species of timber importance. The specimens were collected in Venezuela and include wood samples from the collection of the Laboratorio de Anatomía de Maderas de la Facultad de Ciencias Forestales y Ambientales de la Universidad de Los Andes, Venezuela, and of the Forest Products Laboratory of the USDA Forest Service in Madison, Wisconsin, USA. The terminology and methodology used followed the IAWA List of Microscopic Features for Hardwood Identification of the IAWA Committee, 1989. Measurements from each specimen were averaged (vessel diameters, vessel element lengths, intervessels pit size, fibre lengths and ray height). The species of Detarieae can be separated using a combination of diagnostic features. Wood characters that provide the most important diagnosis and may be used in systematics of Detarieae include: intercellular axial canals, rays heterocellular, rays exclusively or predominantly uniseriate, prismatic crystals common in ray cells, irregular storied structure and fibre wall thickness. For comparative anatomy between Detarieae and Caesalpinieae: intercellular axial canals, heterocellular rays, rays exclusively or predominantly uniseriate, prismatic crystals common in ray cells (in Detarieae) and regular storied structure, fibres septate, fibre wall thick or very thick, rays homocellular, multiseriate rays and silica bodies (in Caesalpinieae). Axial parenchyma is typically a good diagnostic feature for Leguminosae, but not for Detarieae and Caesalpinieae comparisons. PMID:19637709

  18. Phenotypic and molecular identification of Fonsecaea pedrosoi strains isolated from chromoblastomycosis patients in Mexico and Venezuela.

    PubMed

    Carolina Rojas, O; León-Cachón, Rafael B R; Pérez-Maya, Antonio Alí; Aguirre-Garza, Marcelino; Moreno-Treviño, María G; González, Gloria M

    2015-05-01

    Chromoblastomycosis is a chronic granulomatous disease caused frequently by fungi of the Fonsecaea genus. The objective of this study was the phenotypic and molecular identification of F. pedrosoi strains isolated from chromoblastomycosis patients in Mexico and Venezuela. Ten strains were included in this study. For phenotypic identification, we used macroscopic and microscopic morphologies, carbohydrate assimilation test, urea hydrolysis, cixcloheximide tolerance, proteolitic activity and the thermotolerance test. The antifungal activity of five drugs was evaluated against the isolates. Molecular identification was performed by sequencing the internal transcribed spacer (ITS) ribosomal DNA regions of the isolated strains. The physiological analysis and morphological features were variable and the precise identification was not possible. All isolates were susceptible to itraconazole, terbinafine, voriconazole and posaconazole. Amphotericin B was the least effective drug. The alignment of the 559-nucleotide ITS sequences from our strains compared with sequences of GenBank revealed high homology with F. pedrosoi (EU285266.1). In this study, all patients were from rural areas, six from Mexico and four from Venezuela. Ten isolates were identified by phenotypic and molecular analysis, using ITS sequence and demonstrated that nine isolates from Mexico and Venezuela were 100% homologous and one isolate showed a small genetic distance. PMID:25728464

  19. [Control, elimination and eradication of viral immuno preventable diseases in Venezuela].

    PubMed

    Valero, Nereida; Maldonado, Mery

    2005-09-01

    Vaccination has demonstrated the capacity for the drastic decrease of the prevalence and incidence of several diseases of viral etiology and it has allowed their eradication. Among these human immuno preventable diseases are included poliomyelitis, measles, mumps, chicken pox, rubella, hepatitis A and B, influenza A and yellow fever. In residents, travelers to endemic areas and personal at risk, the vaccines to Japanese and equine encephalitis, rabies and adenovirus can be applied. Venezuela has not escaped from the positive impact in the epidemiology of these illnesses as a consequence of the organization and implementation of big national vaccination campaigns; however, and in spite of these efforts, important outbreaks of measles, yellow fever, chicken pox and hepatitis have occurred in the last few years. The tools to eliminate the majority of these viral diseases exist in Venezuela as well as in other countries, and are readily available, effective and relatively not expensive, but require on the whole of an effort of authorities and communities. The implementation of these strategies should have the support of the World Health Organization and the Panamerican Health Organization. This is a priority for the next few years if our aim is the eradication of these illnesses from Venezuela, the continent and the world. PMID:16152776

  20. Genetic, geographic, and linguistic distances in Europe

    SciTech Connect

    Sokal, R.R.

    1988-03-01

    Genetic and taxonomic distances were computed for 3466 samples of human populations in Europe based on 97 allele frequencies and 10 cranial variables. Since the actual samples employed differed among the genetic systems studied, the genetic distances were computed separately for each system, as were matrices of geographic distances and of linguistic distances based on membership in the same language family of phylum. Significant matrix correlations between genetics and geography were found for the majority of systems; somewhat less frequent are significant correlations between genetics and language. The effects of the two factors can be separated by means of partial matrix correlations. These show significant values for both genetics and geography, language kept constant, and genetics and language, geography kept constant, with a tendency for the former to be higher. These findings demonstrate that speakers of different language families in Europe differ genetically and that this difference remains even after geographic differentiation is allowed for. The greater effect of geography than of language may be due to the several factors that bring about spatial differentiation in human populations.

  1. Geographic Wormhole Detection in Wireless Sensor Networks

    PubMed Central

    Sookhak, Mehdi; Akhundzada, Adnan; Sookhak, Alireza; Eslaminejad, Mohammadreza; Gani, Abdullah; Khurram Khan, Muhammad; Li, Xiong; Wang, Xiaomin

    2015-01-01

    Wireless sensor networks (WSNs) are ubiquitous and pervasive, and therefore; highly susceptible to a number of security attacks. Denial of Service (DoS) attack is considered the most dominant and a major threat to WSNs. Moreover, the wormhole attack represents one of the potential forms of the Denial of Service (DoS) attack. Besides, crafting the wormhole attack is comparatively simple; though, its detection is nontrivial. On the contrary, the extant wormhole defense methods need both specialized hardware and strong assumptions to defend against static and dynamic wormhole attack. The ensuing paper introduces a novel scheme to detect wormhole attacks in a geographic routing protocol (DWGRP). The main contribution of this paper is to detect malicious nodes and select the best and the most reliable neighbors based on pairwise key pre-distribution technique and the beacon packet. Moreover, this novel technique is not subject to any specific assumption, requirement, or specialized hardware, such as a precise synchronized clock. The proposed detection method is validated by comparisons with several related techniques in the literature, such as Received Signal Strength (RSS), Authentication of Nodes Scheme (ANS), Wormhole Detection uses Hound Packet (WHOP), and Wormhole Detection with Neighborhood Information (WDI) using the NS-2 simulator. The analysis of the simulations shows promising results with low False Detection Rate (FDR) in the geographic routing protocols. PMID:25602616

  2. GEODE Initiative: Geographic Data in Education

    NSDL National Science Digital Library

    Edelson, Daniel

    The Geographic Data in Education (GEODE) Initiative is dedicated to the improvement of Earth and environmental science education through the use of data visualization and analysis tools to support inquiry-based pedagogy. The goal is to demonstrate that scientific visualization, incorporated into inquiry-based learning, can enable students of diverse abilities to develop an understanding of complex scientific phenomena. This project designs and evaluates learning software, develops and field tests middle and high school curricula, and investigates the process by which students learn to make sense of scientific visualizations. Software products are WorldWatcher, a tool which supports the study of climate and global climate change, and MyWorld GIS, a vector-based geographic information system software that runs in Java on Windows NT, 98, ME, 2000, and MacOS X. Curricula are The Global Warming Project, an eight week, stand alone unit in which middle school students learn about many of the scientific factors that contribute to the controversial global warming debate, and Looking At The Environment, a year long, visually intensive high school environmental science curriculum centered on three key issues: the relationship between population growth and resource availability; electricity generation and meeting the demand for energy; managing water resources for agricultural use and human consumption.

  3. Toward a Geographically-Integrated, Connected World History: Employing Geographic Information Systems (GIS)

    Microsoft Academic Search

    J. B. Owens

    2007-01-01

    Over the past decade, historical groups, ranging from the Organization of American Historians to the World History Association, have called for research and teaching focused on the ways that the history of any place has been shaped by the place's interactive connections to other geographic locations. This work demands the aggregation and connection of a huge amount of information, which

  4. Integrating Geographic Information Systems (GIS) Applications into Business Courses Using Online Business Geographics Modules

    ERIC Educational Resources Information Center

    Miller, Fred; Mangold, W. Glynn; Holmes, Terry

    2006-01-01

    Although the value of geographic information systems (GIS) technologies is recognized by practitioners and educators alike, GIS instruction has yet to make significant inroads into business curricula. In this article, the authors discuss the constraints of integrating GIS tools into business education. They develop a prototype module for…

  5. Disparities in Geographic Access to Pediatric Subspecialty Care

    Microsoft Academic Search

    Michelle L. Mayer

    2008-01-01

    Purpose: To identify correlates of geographic access to pediatric medical subspecialists in the United States and identify characteristics\\u000a of populations at risk for poor geographic access. Methods: Geographic access was operationalized as distance to care. Using data from the American Board of Pediatrics and the Claritas’\\u000a Pop-Facts Database, the straight-line distance between each zip code in the United States and

  6. Towards a Geographic Ontology Reference Model for Matching Purposes

    Microsoft Academic Search

    Guillermo Nudelman Hess; Cirano Iochpe; Silvana Castano

    2007-01-01

    Ontologies and geographic ontologies are becoming important re- search and application fields for the geographic information systems (GIS) community. Although geographic ontologies (also known as spatial-temporal ontologies, geo-ontologies or geospatial ontologies) are becoming popular, a standard and complete model is still missing. The attempts for establishing standards are yet incipient, i.e., do not fulfill the actual needs. In this paper

  7. Comparing Representations of Geographic Knowledge Expressed as Conceptual Graphs

    Microsoft Academic Search

    Athanasios Karalopoulos; Margarita Kokla; Marinos Kavouras

    2005-01-01

    \\u000a Conceptual Graphs are a very powerful knowledge and meaning representation formalism grounded on deep philosophical, linguistic\\u000a and object oriented principles [1], [2]. Concerning geographic knowledge representation and matching, the study and analysis\\u000a of geographic concept definitions plays an important role in deriving systematic knowledge about concepts and comparing geographic\\u000a categories in order to identify similarities and heterogeneities [4]. Based on

  8. Geographic Information Systems and Web Page Development

    NASA Technical Reports Server (NTRS)

    Reynolds, Justin

    2004-01-01

    The Facilities Engineering and Architectural Branch is responsible for the design and maintenance of buildings, laboratories, and civil structures. In order to improve efficiency and quality, the FEAB has dedicated itself to establishing a data infrastructure based on Geographic Information Systems, GIs. The value of GIS was explained in an article dating back to 1980 entitled "Need for a Multipurpose Cadastre which stated, "There is a critical need for a better land-information system in the United States to improve land-conveyance procedures, furnish a basis for equitable taxation, and provide much-needed information for resource management and environmental planning." Scientists and engineers both point to GIS as the solution. What is GIS? According to most text books, Geographic Information Systems is a class of software that stores, manages, and analyzes mapable features on, above, or below the surface of the earth. GIS software is basically database management software to the management of spatial data and information. Simply put, Geographic Information Systems manage, analyze, chart, graph, and map spatial information. At the outset, I was given goals and expectations from my branch and from my mentor with regards to the further implementation of GIs. Those goals are as follows: (1) Continue the development of GIS for the underground structures. (2) Extract and export annotated data from AutoCAD drawing files and construct a database (to serve as a prototype for future work). (3) Examine existing underground record drawings to determine existing and non-existing underground tanks. Once this data was collected and analyzed, I set out on the task of creating a user-friendly database that could be assessed by all members of the branch. It was important that the database be built using programs that most employees already possess, ruling out most AutoCAD-based viewers. Therefore, I set out to create an Access database that translated onto the web using Internet Explorer as the foundation. After some programming, it was possible to view AutoCAD files and other GIS-related applications on Internet Explorer, while providing the user with a variety of editing commands and setting options. I was also given the task of launching a divisional website using Macromedia Flash and other web- development programs.

  9. 47 CFR 27.1206 - Geographic Service Area.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...Section 27.1206 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Broadband Radio Service and Educational Broadband Service § 27.1206 Geographic Service...

  10. 47 CFR 27.1206 - Geographic Service Area.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Section 27.1206 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Broadband Radio Service and Educational Broadband Service § 27.1206 Geographic Service...

  11. Multivariate Analysis and Geovisualization with an Integrated Geographic Knowledge

    E-print Network

    of complex geographic problems. This research integrates computational, visual, and cartographic methods interactions to explore and examine patterns. The research shows that such "mixed initiative" methods

  12. USER INTERFACES FOR GEOGRAPHIC INFORMATION REPORT ON THE SPECIALIST MEETING

    E-print Network

    California at Santa Barbara, University of

    : Opinions, Observations, and Matthew McGranaghan Questions Graphical User Interfaces and Cartographic a Position on User Interfaces for Geographic Information Systems Dana Tomlin Human-Computer Interaction

  13. Most frequent mutation c.3402delC (p.Ala1135GlnfsX13) among Wilson disease patients in Venezuela has a wide distribution and two old origins.

    PubMed

    Paradisi, Irene; De Freitas, Laura; Arias, Sergio

    2015-02-01

    Wilson disease is an infrequent autosomal recessive disorder caused by mutations in the ATP7B gene (13q14.3) producing pathologic phenotypes due to copper accumulation in critical tissues. The aim of the research was to probe Wilson disease genetic epidemiology in Venezuela, through the identification in diagnosed index cases, of ATP7B locus mutations, their geographic distribution, frequency, in-phase haplotypes and probable ethnic ancestry. During the last three decades 33 independent Wilson disease families from the country at large were ascertained and diagnosed through severely reduced ceruloplasmin activity, higher urinary copper excretion, and specific clinical signs. Molecular studies of the ATP7B gene were accomplished in 26 of the families. Disease prevalence was estimated as 1:94,000 families between 1985 and 2013, showing geographic aggregation in the state of Zulia with 1:27,000 families in it. DNA analysis in 26 families revealed 13 different mutations. The c.3402delC was the most frequent one (26.9%), presenting two independent in-phase haplotypes, both of likely European descent; which is followed by the not previously reported p.G691V (9.6%) and by the frequent European H1069Q (7.7%). Known mutations c.51 + 4A > T, c.1285 + 5G > T, M645R, T788I, V845SfsX28, T977M, L1088X, T1220M, R1319X and a novel P767L showed frequencies between 5.8 and 1.9%. Despite the ample mutation heterogeneity for Wilson disease in the country, the findings provide a diagnostic algorithm to ease mutation assessment in new patients; the predominant c.3402delC displayed wide geographic distribution and two genetic origins. PMID:25497208

  14. The geographical distribution of Q fever

    PubMed Central

    Kaplan, Martin M.; Bertagna, P.

    1955-01-01

    The results of a WHO-assisted survey of the distribution of Q fever in 32 countries and an analysis of reports published to date indicate that Q fever exists in 51 countries on five continents. Q-fever infection was most often reported in man and the domestic ruminants, such as cattle, sheep, and goats. The disease was found to exist in most countries where investigations were carried out. Notable exceptions were Ireland, the Netherlands, New Zealand, Poland, and the Scandinavian countries. With the exception of Poland, where the results were inconclusive, all these countries import relatively few domestic ruminants—the most important animal reservoirs of human Q-fever infection. It seems, therefore, that the traffic of infected ruminants may be one of the most important, if not the most important, means for the geographical spread of Q fever. The importance, if any, of ticks associated with such traffic needs to be defined. PMID:13284560

  15. National Geographic: WildCam Africa

    NSDL National Science Digital Library

    2005-01-01

    In 1985, Pete Le Roux dreamed of a wildlife reserve in Africa. Twenty years later it is a successful reality, as the pond he built from an old irrigation system is alive with the sounds of elephants and impalas. Visitors to this site established by National Geographic Magazine can view "Pete's Pond" via a live webcam offered here. Of course, that's just one of the many highlights that visitors may enjoy. They may also want to read through the weblog authored by researchers Jeanette Selier and Villiers Steyn. Here they post highlights of their work, complemented by a selection of high-quality images of the animals they are studying, such as the African wild cat. Those who are cartographically minded may want to take a look at the map of the Mashatu Game Reserve, which is home to Pete's Pond and its thousands of different animal residents. Overall, this is a fine educational site, and one that warrants several visits.

  16. Geographic analysis of shigellosis in Vietnam.

    PubMed

    Kim, Deok Ryun; Ali, Mohammad; Thiem, Vu Dinh; Park, Jin-Kyung; von Seidlein, Lorenz; Clemens, John

    2008-12-01

    Geographic and ecological analysis may provide investigators useful ecological information for the control of shigellosis. This paper provides distribution of individual Shigella species in space, and ecological covariates for shigellosis in Nha Trang, Vietnam. Data on shigellosis in neighborhoods were used to identify ecological covariates. A Bayesian hierarchical model was used to obtain joint posterior distribution of model parameters and to construct smoothed risk maps for shigellosis. Neighborhoods with a high proportion of worshippers of traditional religion, close proximity to hospital, or close proximity to the river had increased risk for shigellosis. The ecological covariates associated with Shigella flexneri differed from the covariates for Shigella sonnei. In contrast the spatial distribution of the two species was similar. The disease maps can help identify high-risk areas of shigellosis that can be targeted for interventions. This approach may be useful for the selection of populations and the analysis of vaccine trials. PMID:18296100

  17. A situated knowledge representation of geographical information

    SciTech Connect

    Gahegan, Mark N.; Pike, William A.

    2006-11-01

    In this paper we present an approach to conceiving of, constructing and comparing the concepts developed and used by geographers, environmental scientists and other earth science researchers to help describe, analyze and ultimately understand their subject of study. Our approach is informed by the situations under which concepts are conceived and applied, captures details of their construction, use and evolution and supports their ultimate sharing along with the means for deep exploration of conceptual similarities and differences that may arise among a distributed network of researchers. The intent here is to support different perspectives onto GIS resources that researchers may legitimately take, and to capture and compute with aspects of epistemology, to complement the ontologies that are currently receiving much attention in the GIScience community.

  18. Investigation of Error Patterns in Geographical Databases

    NASA Technical Reports Server (NTRS)

    Dryer, David; Jacobs, Derya A.; Karayaz, Gamze; Gronbech, Chris; Jones, Denise R. (Technical Monitor)

    2002-01-01

    The objective of the research conducted in this project is to develop a methodology to investigate the accuracy of Airport Safety Modeling Data (ASMD) using statistical, visualization, and Artificial Neural Network (ANN) techniques. Such a methodology can contribute to answering the following research questions: Over a representative sampling of ASMD databases, can statistical error analysis techniques be accurately learned and replicated by ANN modeling techniques? This representative ASMD sample should include numerous airports and a variety of terrain characterizations. Is it possible to identify and automate the recognition of patterns of error related to geographical features? Do such patterns of error relate to specific geographical features, such as elevation or terrain slope? Is it possible to combine the errors in small regions into an error prediction for a larger region? What are the data density reduction implications of this work? ASMD may be used as the source of terrain data for a synthetic visual system to be used in the cockpit of aircraft when visual reference to ground features is not possible during conditions of marginal weather or reduced visibility. In this research, United States Geologic Survey (USGS) digital elevation model (DEM) data has been selected as the benchmark. Artificial Neural Networks (ANNS) have been used and tested as alternate methods in place of the statistical methods in similar problems. They often perform better in pattern recognition, prediction and classification and categorization problems. Many studies show that when the data is complex and noisy, the accuracy of ANN models is generally higher than those of comparable traditional methods.

  19. Impact of Sensing Coverage on Greedy Geographic Routing Algorithms

    E-print Network

    Impact of Sensing Coverage on Greedy Geographic Routing Algorithms Guoliang Xing, Student Member (e.g., surveillance or object tracking systems) that provide sensing coverage over a geographic area as the communication range is at least twice the sensing range. Furthermore, we extend GF and BVGF to achieve provable

  20. An Evolutionary Algorithm for the Selection of Geographically Informative Species

    E-print Network

    Ashlock, Dan

    , an evolutionary algorithm is used to classify species of fresh- water crustacean zooplankton as geographically zooplankton in 1604 Canadian ponds. A species is geographically informative if its presence or absence the Freshwater Institute (Winnipeg, Manitoba), although subsets have been incorporated in, for instance

  1. Geographical Routing Using Partial Information for Wireless Ad Hoc Networks

    Microsoft Academic Search

    Rahul Jain; Anuj Puri; Raja Sengupta

    1999-01-01

    In this paper we present an algorithm for routing in wire- less ad hoc networks using information about geograph- ical location of the nodes. We assume each node knows its geographical position and the position of the node to which it wants to send a packet. Initially, the nodes know only their neighbors, but over time they discover other nodes

  2. Department of Geographical and Earth Sciences MRes in Human Geography

    E-print Network

    Hammerton, James

    Department of Geographical and Earth Sciences MRes in Human Geography: Space, Policy and Power of Master of Research in Human Geography in the Department of Geographical and Earth Sciences, University: MRes in Human Geography: Space, Policy and Power Title of Dissertation: The Geographies of Biodiversity

  3. Seasonal Forcing on the Dynamics of Clethrionomys rufocanus: Modeling Geographic

    E-print Network

    Seasonal Forcing on the Dynamics of Clethrionomys rufocanus: Modeling Geographic Gradients main seasons ­ summer (the primary breeding season) and winter (the non-reproductive or secondary breeding season). We show that the geographic transition in dynamics may be understood as the combined

  4. Spatial point pattern analysis and its application in geographical epidemiology

    Microsoft Academic Search

    Anthony C Gatrell; Trevor C Bailey; Peter J Diggle; Barry S Rowlingson

    1996-01-01

    This paper reviews a number of methods for the exploration and modelling of spatial point patterns with particular reference to geographical epidemiology (the geographical incidence of disease). Such methods go well beyond the conventional 'nearest-neighbour' and 'quadrat' analyses which have little to offer in an epidemiological context because they fail to allow for spatial variation in population density. Correction for

  5. Illegal Drug Markets: The Geographic Perspective and Crime Propensity

    Microsoft Academic Search

    Jennifer B. Robinson; George F. Rengert

    2006-01-01

    The geographic perspective argues that customers must be accessible to the drug market's location for an illegal drug market to be sustained. Previous research illustrates that geographic and economic principles are key explanatory variables of the locations of illegal drug markets. The current study explores this assumption through an examination of drug sales arrests in Portland, Oregon from 1990 through

  6. Education Participation and Outcomes by Geographic Location. Research Report.

    ERIC Educational Resources Information Center

    Jones, Roger G.

    Data from the Longitudinal Surveys of Australian Youth (LSAY) were analyzed to assess the viability of using the LSAY study data for national reporting of outcomes by geographic location and to identify variations in young Australians' education participation and outcomes by geographic region. The analysis revealed several sample distribution…

  7. Lived and Imagined: Information and Storytelling in Geographic Systems

    ERIC Educational Resources Information Center

    Kabisch, Eric Alan

    2011-01-01

    This dissertation investigates the relationship between storytelling and information in the narration of geographic space. While storytelling has historically shaped our understanding of geography, modern practices in data collection, cartography, and geographic visualization enable one-way forms of representation that remove the negotiation and…

  8. Geographic Mobility and Student Achievement in an Urban Setting

    Microsoft Academic Search

    Gary M. Ingersoll; James P. Scamman; Wayne D. Eckerling

    1989-01-01

    Geographic mobility has long been suspected to have a negative impact on student achievement and adjustment. Urban schools, in particular, are subject to highly mobile subpopulations whose contribution to overall district performance can be a source of serious policy concerns. The purpose of this study was to assess the impact of geographic instability on student achievement among elementary, middle, and

  9. The Rhode Island Geographic Information System 2007 Annual Report

    E-print Network

    Wang, Y.Q. "Yeqiao"

    The Rhode Island Geographic Information System 2007 Annual Report The Rhode Island Department, Rhode Island 02908-5872 May 15, 2007 This document can be found on line in an electronic format (Adobe pdf) at: www.edc.uri.edu/rigis #12;The Rhode Island Geographic Information System PURPOSE: This report

  10. The Rhode Island Geographic Information System 2006 Annual Report

    E-print Network

    Wang, Y.Q. "Yeqiao"

    The Rhode Island Geographic Information System 2006 Annual Report The Rhode Island Department of Administration Division of Information Technology-RIGIS Coordinator One Capitol Hill Providence, Rhode Island.edc.uri.edu/rigis #12;The Rhode Island Geographic Information System PURPOSE: This report provides a synopsis of GIS

  11. 2005 -2010 STRATEGIC MANAGEMENT PLAN RHODE ISLAND GEOGRAPHIC INFORMATION SYSTEM

    E-print Network

    Wang, Y.Q. "Yeqiao"

    2005 - 2010 STRATEGIC MANAGEMENT PLAN FOR THE RHODE ISLAND GEOGRAPHIC INFORMATION SYSTEM The Rhode Providence, Rhode Island 02908-5872 As Reaffirmed by the RIGIS Executive Committee on March 13, 2007 #12;1 2005 - 2010 STRATEGIC MANAGEMENT PLAN FOR THE RHODE ISLAND GEOGRAPHIC INFORMATION SYSTEM EXECUTIVE

  12. Assessing consumer response to protected geographical identification labeling

    Microsoft Academic Search

    Maria Luz Loureiro; Jill J. McCluskey

    2000-01-01

    Consumers' attitudes toward quality and desire for cultural identification have generated a growing demand for agricultural products that carry a strong identification with a particular geographical region. Many of these products are currently protected by European Legislation. A hedonic approach was used in order to calculate consumers' willingness to pay for fresh meat products that carry the Protected Geographical Identification

  13. Connecting the Demographic Dots: Geographic Mobility and Birth Intentions

    ERIC Educational Resources Information Center

    Myers, Scott M.

    2010-01-01

    Having a child is a major determinant of geographic mobility. Little is known, however, about the opposite process--whether geographic mobility is a determinant of fertility. Drawing on social and human capital theories and research on fertility and migration to develop competing hypotheses, the author examines the effects of mobility on changes…

  14. A Geographic Unicast Routing Algorithm Using no Location Service

    Microsoft Academic Search

    Daniel Silvestre; T. Vaza?o

    2010-01-01

    In this paper, we present a geographic routing algorithm which can adapt to different levels of mobility by changing its parameters according to the network in which it is running. Routing decisions are based on directions and geographical positions of the nodes and there is no need for an external location system. Discoveries are done using unicast messages resulting in

  15. Internet Atlas: A Geographic Database of the Internet Ramakrishnan Durairajan

    E-print Network

    Liblit, Ben

    Internet Atlas: A Geographic Database of the Internet Ramakrishnan Durairajan University Internet Atlas, a new visualization and analysis portal for diverse Internet measurement data. The starting point for Atlas is a geographically anchored repre- sentation of the physical Internet including (i

  16. Geographic Profiles: A Technique for Teaching Spatial Relationships.

    ERIC Educational Resources Information Center

    Mealor, W. Theodore, Jr.; Giannangelo, Duane

    2001-01-01

    Describes a learning activity that focuses on geographic profiles. Students are divided into five groups and are responsible for creating a profile of one geographic data set. The five data sets are based on thematic maps of the United States found in "Goode's World Atlas, 19th edition." (CMK)

  17. Assessing Geographical Clustering of Outpatient Psychiatric Service Utilization in Philadelphia

    E-print Network

    Smith, Tony E.

    -spot, Outpatient psychiatric service utilization, GIS, Racial disparity #12;2 Assessing Geographical Clustering, CMHC Act (1963) under the Kennedy administration established "Community Mental Health Centers" (CMHCs) across the nation to provide high-quality mental health services that are geographically and economically

  18. GEOGRAPHICAL DISTRIBUTION AND MORPHOMETRICS OF SOUTH DAKOTA TURTLES

    E-print Network

    GEOGRAPHICAL DISTRIBUTION AND MORPHOMETRICS OF SOUTH DAKOTA TURTLES BY SARAH J. BANDAS A thesis AND MORPHOMETRICS OF SOUTH DAKOTA TURTLES This thesis is approved as a creditable and independent investigation GEOGRAPHICAL DISTRIBUTION AND MORPHOMETRICS OF SOUTH DAKOTA TURTLES Sarah J. Bandas 2003 Relatively little

  19. Volunteered geographic information production as a spatial process

    Microsoft Academic Search

    Darren Hardy; James Frew; Michael F. Goodchild

    2012-01-01

    Wikipedia is a free encyclopedia that anyone can edit and a popular example of user-generated content that includes volunteered geographic information (VGI). In this article, we present three main contributions: (1) a spatial data model and collection methods to study VGI in systems that may not explicitly support geographic data; (2) quantitative methods for measuring distance between online authors and

  20. Sensitivity of distributional prediction algorithms to geographic data completeness

    Microsoft Academic Search

    A Townsend Peterson; Kevin P Cohoon

    1999-01-01

    The sensitivity of one algorithm for prediction of geographic distributions of species from point data to depth of geographic information was tested for three species of North American birds. Test species were chosen to represent three distinct distributional patterns—western North America (Pygmy Nuthatch Sitta pygmaea), eastern North America (Barred Owl Strix varia), and the Great Plains in the central part

  1. Representation and Spatial Analysis in Geographic Information Systems

    Microsoft Academic Search

    Harvey J. Miller; Elizabeth A. Wentz

    2003-01-01

    A common—perhaps modal—representation of geography in spatial analysis and geographic information systems is native (unexamined) objects interacting based on simple distance and connectivity relationships within an empty Euclidean space. This is only one possibility among a large set of geographic representations that can support quantitative analysis. Through the vehicle of GIS, many researchers are adopting this representation without realizing its

  2. Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations

    Microsoft Academic Search

    Adam B. Jaffe; Manuel Trajtenberg; Rebecca Henderson

    1992-01-01

    We compare the geographic location of patent citations to those of the cited patents, as evidence of the extent to which knowledge spillovers are geographically localized. We find that citations to U.S. patents are more likely to come from the U.S., and more likely to come from the same state and SMSA as the cited patents than one would expect

  3. Citation of research in journals of interest to applied geographers

    Microsoft Academic Search

    Robert V. Rohli; Kam-biu Liu

    2008-01-01

    Citation statistics from 1997 to 2004 for 393 journals of interest to applied geographers were examined. Manuscripts in serials with economic, environmental, inter-disciplinary, global, and contemporary foci are cited most frequently—an advantageous trend for applied geographers. Physical geography articles tend to be cited more frequently than those in human geography, but undercounts of citations of books and other monographs may

  4. Geographically intelligent disclosure control for flexible aggregation of census data

    Microsoft Academic Search

    Caroline Young; David Martin; Chris Skinner

    2009-01-01

    This paper describes a geographically intelligent approach to disclosure control for protecting flexibly aggregated census data. Increased analytical power has stimulated user demand for more detailed information for smaller geographical areas and customized boundaries. Consequently, it is vital that improved methods of statistical disclosure control are developed to protect against the increased disclosure risk. Traditionally methods of statistical disclosure control

  5. THE CIAO: WEB PORTAL OF GEOGRAPHIC INFORMATION FOR WEST AFRICA

    E-print Network

    Paris-Sud XI, Université de

    THE CIAO: WEB PORTAL OF GEOGRAPHIC INFORMATION FOR WEST AFRICA GEORIS CREUSEVEAU, J.1, GOURMELON, F and Marine Area of West Africa). It leads to a web portal of information for the West African coastal zone, GEOGRAPHICAL INFORMATION, METADATA, WEB PORTAL, WEST AFRICA INTRODUCTION The West African coastal region

  6. Two Perspectives on Data Quality Geographic Knowledge Production Through GIS

    E-print Network

    California at Santa Barbara, University of

    Two Perspectives on Data Quality Geographic Knowledge Production Through GIS: Towards a Model Report 92-12 December 1992 #12;Geographic Knowledge Production Through GIS: Towards a Model for Quality through GIS: Towards a model for quality monitoring. HELEN COUCLELIS Department of Geography University

  7. MODULE DESCRIPTION FORM CL 961 Geographical Information Systems (GIS)

    E-print Network

    Mottram, Nigel

    MODULE DESCRIPTION FORM CL 961 Geographical Information Systems (GIS) Module Registrar: Dr Elsa current state-of-the-art Geographical Information Systems (GIS). GIS are spatial databases that can handle of living in different areas is related to health and disease. Although GIS is a crucial analytical tool

  8. GEOGRAPHIC INFORMATION Prepare for a Career in Information

    E-print Network

    Frank, Thomas D.

    demand for students with knowledge about the earth's systems and how geographic information systems GEOG 371 Spatial Analysis GEOG 379 Introduction to Geographic Information Systems GEOG 473 Cartography and Cultural Geography A minimum of 4 courses from: GEOG 280 Social Statistics GEOG 205 Business Location

  9. Lithospheric Expressions of the Precambrian Shield, Mesozoic Rifting, and Cenozoic Subduction and Mountain Building in Venezuela

    NASA Astrophysics Data System (ADS)

    Levander, A.; Masy, J.; Niu, F.

    2013-05-01

    The Caribbean (CAR)-South American (SA) plate boundary in Venezuela is a broad zone of faulting and diffuse deformation. GPS measurements show the CAR moving approximately 2 cm/yr relative to SA, parallel to the strike slip fault system in the east, with more oblique convergence in the west (Weber et al., 2001) causing the southern edge of the Caribbean to subduct beneath northwestern South America. The west is further complicated by the motion of the triangular Maracaibo block, which is escaping northeastward relative to SA along the Bocono and Santa Marta Faults. In central and eastern Venezuela, plate motion is accommodated by transpression and transtension along the right lateral San Sebastian- El Pilar strike-slip fault system. The strike-slip system marks the northern edge of coastal thrust belts and their associated foreland basins. The Archean-Proterozoic Guayana Shield, part of the Amazonian Craton, underlies southeastern and south-central Venezuela. We used the 87 station Venezuela-U.S. BOLIVAR array (Levander et al., 2006) to investigate lithospheric structure in northern South America. We combined finite-frequency Rayleigh wave tomography with Ps and Sp receiver functions to determine lithosphere-asthenosphere boundary (LAB) depth. We measured Rayleigh phase velocities from 45 earthquakes in the period band 20-100s. The phase velocities were inverted for 1D shear velocity structure on a 0.5 by 0.5 degree grid. Crustal thickness for the starting model was determined from active seismic experiments and receiver function analysis. The resulting 3D shear velocity model was then used to determine the depth of the LAB, and to CCP stack Ps and Sp receiver functions from ~45 earthquakes. The receiver functions were calculated in several frequency bands using iterative deconvolution and inverse filtering. Lithospheric thickness varies by more a factor of 2.5 across Venezuela. We can divide the lithosphere into several distinct provinces, with LAB depth reflecting the signatures of the Precambrian craton in the south, Mesozoic rifting in central Venezuela, and Neogene subduction and orogenesis in both the northeast and northwest. Specifically, LAB depth varies from 110-130 km beneath the Guayana Shield, in agreement with finite-frequency body wave tomography (Bezada et al., 2010b). To the north beneath the Serrania del Interior and Maturin Basin the Rayleigh waves image two high velocity features to depths of 200 km. The northernmost, beneath the Serrania, corresponds to the top of the subducting Atlantic plate, in agreement with P-wave tomography that images the Atlantic plate to transition zone depths. Another localized high velocity feature extending to ~200 km depth lies to the south. We speculate that this is a lithospheric drip caused by destabilization of the SA lithospheric caused by Atlantic subduction. Immediately to the west beneath the Cariaco basin the LAB is at ~50 km, marking the top of a pronounced low velocity zone. The thin lithosphere extends southwestward from the Cariaco Basin beneath the Mesozoic Espino Graben to the craton. To the west the LAB deepens to ~80 km beneath the Barinas Apure Basin and then to ~90 km beneath the Neogene Merida Andes and Maracaibo block.

  10. Development and application of Nanji Islands biodiversity geographical information system

    NASA Astrophysics Data System (ADS)

    Zhang, Huaguo; Huang, Weigen; Yang, Jingsong; Fu, Bin; Li, Dongling

    2008-12-01

    Nanji Islands National Natural Reserve is a very representatively marine protected area (MPA) in China. The MPA is built for protecting shellfish, algae and their inhabit environment. The purpose of this paper is to develop a special geographical information system to manage the biodiversity data and environment data. Basic geographic data are collected by topographic maps, chart maps and high resolution remote sensing. More than four times survey data are collected since 1992, including shellfish and macro benthic algae species data, water body and tide flat environment data. All of geographic data and biodiversity data are imported into geodatabase created with ArcGIS. Then some applied function is developed for display, manage and analyze the basic geographic and biodiversity data. Finally, some applications with Nanji Islands biodiversity geographical information system are showed.

  11. Development of Virtual Geographic Environments and Geography Research

    NASA Astrophysics Data System (ADS)

    Huang, Fengru; Lin, Hui; Chen, Bin

    Geographic environment is a combination of natural and cultural environments under which humans survive. Virtual Geographic Environment (VGE) is a new multi-disciplinary initiative that links geosciences, geographic information sciences and information technologies. A VGE is a virtual representation of the natural world that enables a person to explore and interact with vast amounts of natural and cultural information on the physical and cultural environment in cyberspace. Virtual Geography and Experimental Geography are the two closest fields that associate with the development of VGE from the perspective of geography. This paper discusses the background of VGE, introduces its research progress, and addresses key issues of VGE research and the significance for geography research from Experimental Geography and Virtual Geography. VGE can be an extended research object for the research of Virtual Geography and enrich the contents of future geography, while VGE can also be an extended research method for Experimental Geography that geographers can operate virtual geographic experiments based on VGE platforms.

  12. Marked geographic aggregation of acute intermittent porphyria families carrying mutation Q180X in Venezuelan populations, with description of further mutations.

    PubMed

    Paradisi, Irene; Arias, Sergio

    2010-12-01

    Acute intermittent porphyria (AIP) caused by mutations in the hydroxymethylbilane synthase gene (HMBS), has been reported in almost all human populations, with varying frequencies. A founder effect for a few specific mutations in geographic regions where prevalence is high (Sweden, The Netherlands, Switzerland) has been established through haplotype analyses, while some other mutations (R26H, R26C) have been repeatedly reported in many populations with different genetic backgrounds. Epidemiological, biochemical and molecular data on AIP in Venezuela were gathered during the last two decades; 24 independent families with AIP were ascertained, based on a deficient HMBS activity and increased porphobilinogen (PBG) urinary excretion. Molecular analyses of coding and splicing regions were performed in 23 families, to establish disease-causing changes, and haplotype analyses were used to assess ancestral kinships between them. Changes were detected in 16 out of 23 families, 9 of them being different: R26H, R26C, c.87+5G>A, c.267-54_61delgaaggggt, R116W, Q180X, c.825+1G>A, c.913-1delG, and 3' UTR *277G>A. Seven mutations were found, each one in a single family; one mutation was present in two unrelated families, whereas mutation Q180X was shared by 7 independent kindreds, all of which had the same haplotype (-);T;A;T;G;T;A;G (3167delG; 3530T>C; 3581A>G; 3982T>C; 6479G>T; 7052T>C; 7064A>C; 7779G>A). Six out of seven different Q180X carrier families came from the same geographic focus (Santa Lucía, Miranda State). Dense geographic aggregation with one identical haplotype strongly suggests a remote founder phenomenon for these Venezuelan AIP families, carrying an unreported but most frequent mutation. PMID:20978940

  13. Life-history and ecological correlates of geographic variation in egg and clutch mass among passerine species.

    PubMed

    Martin, Thomas E; Bassar, R D; Bassar, S K; Fontaine, J J; Lloyd, P; Mathewson, H A; Niklison, A M; Chalfoun, A

    2006-02-01

    Broad geographic patterns in egg and clutch mass are poorly described, and potential causes of variation remain largely unexamined. We describe interspecific variation in avian egg and clutch mass within and among diverse geographic regions and explore hypotheses related to allometry, clutch size, nest predation, adult mortality, and parental care as correlates and possible explanations of variation. We studied 74 species of Passeriformes at four latitudes on three continents: the north temperate United States, tropical Venezuela, subtropical Argentina, and south temperate South Africa. Egg and clutch mass increased with adult body mass in all locations, but differed among locations for the same body mass, demonstrating that egg and clutch mass have evolved to some extent independent of body mass among regions. A major portion of egg mass variation was explained by an inverse relationship with clutch size within and among regions, as predicted by life-history theory. However, clutch size did not explain all geographic differences in egg mass; eggs were smallest in South Africa despite small clutch sizes. These small eggs might be explained by high nest predation rates in South Africa; life-history theory predicts reduced reproductive effort under high risk of offspring mortality. This prediction was supported for clutch mass, which was inversely related to nest predation but not for egg mass. Nevertheless, clutch mass variation was not fully explained by nest predation, possibly reflecting interacting effects of adult mortality. Tests of the possible effects of nest predation on egg mass were compromised by limited power and by counterposing direct and indirect effects. Finally, components of parental investment, defined as effort per offspring, might be expected to positively coevolve. Indeed, egg mass, but not clutch mass, was greater in species that shared incubation by males and females compared with species in which only females incubate eggs. However, egg and clutch mass were not related to effort of parental care as measured by incubation attentiveness. Ecological and life-history correlates of egg and clutch mass variation found here follow from theory, but possible evolutionary causes deserve further study. PMID:16610329

  14. National Geographic Education. An Interview with Gilbert M. Grosvenor, President and Chairman of the Board, National Geographic Society.

    ERIC Educational Resources Information Center

    Jumper, Sidney R.

    1991-01-01

    Presents an interview with Gilbert Grosvenor, president and chairman of the board of the National Geographic Society. Examines student and public ignorance about geography. Describes the Society's Geography Education Project, Geographic Alliance Project, and Education Foundation. Includes Grosvenor's call for greater emphasis on geography in…

  15. Diurnal raptors in the fragmented rain forest of the Sierra Imataca, Venezuela

    USGS Publications Warehouse

    Alvarez, E.; Ellis, D.H.; Smith, D.G.; LaRue, C.T.

    1996-01-01

    The rain forest of the Sierra Imataca in eastern Venezuela has been subjected to extensive deforestation for pastures and agricultural settlements. In the last decade the opening of access roads combined with intensified logging and mining activities have fragmented a significant portion of the remaining forest. We noted local distribution and habitat use for 42 species of diurnal raptors observed in affected areas in this region. We observed some raptors considered as forest interior species and other open country species foraging and roosting in man-made openings inside the forest.

  16. Diurnal raptors in the fragmented rain forest of the Sierra Imataca, Venezuela

    USGS Publications Warehouse

    Alvarez, E.; Ellis, D.H.; Smith, D.G.; LaRue, C.T.

    1994-01-01

    The rain forest of the Sierra Imataca in eastern Venezuela has been subjected to extensive deforestation for pastures and agricultural settlements. In the last decade the opening of access roads combined with intensified logging and mining activities have fragmented a significant portion of the remaining forest. We noted local distribution and habitat use for 40 species of diurnal raptors observed in ten affected areas, including raptors considered as forest interior species and some open country species utilizing the man-made openings inside the forest for roosting and foraging.

  17. Sentinel Surveillance of Influenza-Like Illness in Two Hospitals in Maracay, Venezuela: 2006–2010

    PubMed Central

    Comach, Guillermo; Teneza-Mora, Nimfa; Kochel, Tadeusz J.; Espino, Carlos; Sierra, Gloria; Camacho, Daria E.; Laguna-Torres, V. Alberto; Garcia, Josefina; Chauca, Gloria; Gamero, Maria E.; Sovero, Merly; Bordones, Slave; Villalobos, Iris; Melchor, Angel; Halsey, Eric S.

    2012-01-01

    Background Limited information exists on the epidemiology of acute febrile respiratory illnesses in tropical South American countries such as Venezuela. The objective of the present study was to examine the epidemiology of influenza-like illness (ILI) in two hospitals in Maracay, Venezuela. Methodology/Principal Findings We performed a prospective surveillance study of persons with ILI who presented for care at two hospitals in Maracay, Venezuela, from October 2006 to December 2010. A respiratory specimen and clinical information were obtained from each participant. Viral isolation and identification with immunofluorescent antibodies and molecular methods were employed to detect respiratory viruses such as adenovirus, influenza A and B, parainfluenza, and respiratory sincytial virus, among others. There were 916 participants in the study (median age: 17 years; range: 1 month – 86 years). Viruses were identified in 143 (15.6%) subjects, and one participant was found to have a co-infection with more than one virus. Influenza viruses, including pandemic H1N1 2009, were the most frequently detected pathogens, accounting for 67.4% (97/144) of the viruses detected. Adenovirus (15/144), parainfluenza virus (13/144), and respiratory syncytial virus (11/144) were also important causes of ILI in this study. Pandemic H1N1 2009 virus became the most commonly isolated influenza virus during its initial appearance in 2009. Two waves of the pandemic were observed: the first which peaked in August 2009 and the second - higher than the preceding - that peaked in October 2009. In 2010, influenza A/H3N2 re-emerged as the most predominant respiratory virus detected. Conclusions/Significance Influenza viruses were the most commonly detected viral organisms among patients with acute febrile respiratory illnesses presenting at two hospitals in Maracay, Venezuela. Pandemic H1N1 2009 influenza virus did not completely replace other circulating influenza viruses during its initial appearance in 2009. Seasonal influenza A/H3N2 was the most common influenza virus in the post-pandemic phase. PMID:22984519

  18. A novel Streptomyces spp. integration vector derived from the S. venezuelae phage, SV1

    PubMed Central

    2014-01-01

    Background Integrating vectors based on the int/attP loci of temperate phages are convenient and used widely, particularly for cloning genes in Streptomyces spp. Results We have constructed and tested a novel integrating vector based on g27, encoding integrase, and attP site from the phage, SV1. This plasmid, pBF3 integrates efficiently in S. coelicolor and S. lividans but surprisingly fails to generate stable integrants in S. venezuelae, the natural host for phage SV1. Conclusion pBF3 promises to be a useful addition to the range of integrating vectors currently available for Streptomyces molecular genetics. PMID:24885867

  19. Biological control of Diatraea spp. (Lepidoptera: Pyralidae) in sugarcane crops in Central Venezuela.

    PubMed

    Weir, Enrique H L; Contreras, Williams; de Weir, Karine Gil

    2007-06-01

    In 1990-1996, we evaluated the relative importance of the Amazonian fly (Metagonystilum minense) and the wasp (Cotesiaflavipes), in sugarcane crops, in Central Venezuela. We observed a significant decrease in relative abundance of Diatraea spp. when the Amazon fly abundance increased but not with the wasp abundance. Diatraea spp. abundance in presence of both parasitoids was similar to its abundance throughout the last 45 years, when only inundations of M. minense occurred. However a net effect by using both parasitoids was not evident. M. minense is probably the stronger pest control, because its more efficient in its host searching than C. flavipes and is better as competitor than the wasp. PMID:19069775

  20. Cartographic services contract...for everything geographic

    USGS Publications Warehouse

    U.S. Geological Survey

    2003-01-01

    The U.S. Geological Survey's (USGS) Cartographic Services Contract (CSC) is used to award work for photogrammetric and mapping services under the umbrella of Architect-Engineer (A&E) contracting. The A&E contract is broad in scope and can accommodate any activity related to standard, nonstandard, graphic, and digital cartographic products. Services provided may include, but are not limited to, photogrammetric mapping and aerotriangulation; orthophotography; thematic mapping (for example, land characterization); analog and digital imagery applications; geographic information systems development; surveying and control acquisition, including ground-based and airborne Global Positioning System; analog and digital image manipulation, analysis, and interpretation; raster and vector map digitizing; data manipulations (for example, transformations, conversions, generalization, integration, and conflation); primary and ancillary data acquisition (for example, aerial photography, satellite imagery, multispectral, multitemporal, and hyperspectral data); image scanning and processing; metadata production, revision, and creation; and production or revision of standard USGS products defined by formal and informal specification and standards, such as those for digital line graphs, digital elevation models, digital orthophoto quadrangles, and digital raster graphics.

  1. National Geographic Online: The Underground Railroad

    NSDL National Science Digital Library

    2003-01-01

    Just in time to celebrate Black History Month, this multimedia educational Web site from National Geographic offers a diverse set of materials that describe the Underground Railroad, the famed network of individuals who helped transport African-Americans to freedom before the abolition of slavery. Students will want to start by taking The Journey, which, with the aid of visual materials (such as historical photographs of slaves and abolitionists) and audio selections (such as popular spirituals of the day), allows young people to make decisions about what to do in order to reach the North and freedom. Next, visitors can look at a map of the Underground Railroad routes, including those specific to Harriet Tubman. Also, a nice timeline provides some context to the history of slavery in the New World, beginning with the importing of slaves by Spaniards to Santo Domingo in 1501, and concluding in 1865 when slavery was abolished by the passage of the 13th Amendment. The site is rounded out by a number of educational resources for teachers, divided by grade levels.

  2. National Geographic Video: Animals, Travel, Kids

    NSDL National Science Digital Library

    The "Video" section of the wonderful National Geographic website has so much to offer visitors. Many of the videos are just several minutes long, such as the two minute and twelve second video taken of an Australian sea lion attacking and eating an octopus, with a "Crittercam" that is attached to the sea lion. The videos are divided into six categories, including "Adventure", "Animals", "Environment", "Kids", "Movies", and "Music Videos". Within each of the categories, there are at least half a dozen subcategories, so visitors have a constant supply of videos, with new videos added frequently. The homepage of the Video section has "Featured Videos", and presently includes a very timely four minute segment entitled "Egypt Antiquities Damaged, At Risk During Unrest" about the damage that looters had done to artifacts at the Egyptian Museum in Cairo. The "Movies" category contains mainly clips or previews from films, and visitors should check out the four clips from the movie "God Grew Tired of Us", about former child soldiers of Africa.

  3. National Geographic: Endangered Species Photo Map

    NSDL National Science Digital Library

    2008-01-01

    The National Geographic website has an interactive photo map of animals in the United States that are on the Endangered Species List. The map accompanies their January 2009 print and online article entitled "Countdown to Extinction," and also includes a photo gallery and the story of the successful rebound of the white rhinoceros in southern Africa. By clicking on the photo of the pygmy rabbit or "View Photo Map" on the homepage, the visitor will be taken to a map of the United States with clickable locations of 20 animal species that are endangered or threatened. Visitors should not miss taking a look at the photo and accompanying facts about the "Alabama Beach Mouse" in Alabama and the "Ocelot" in Texas. In order to learn more about the Endangered Species Act under which the creatures on the map are protected, visitors should click on the "Feature Article" link above the photo map. The "Photo Gallery" link, located above the photo map will take visitors to some arresting and elegant photos of various animal and plant species, some of which were not on the photo map. The photo of the Loggerhead Sea Turtle is beautiful, and not to be missed.

  4. Inferring social ties from geographic coincidences

    PubMed Central

    Crandall, David J.; Backstrom, Lars; Cosley, Dan; Suri, Siddharth; Huttenlocher, Daniel; Kleinberg, Jon

    2010-01-01

    We investigate the extent to which social ties between people can be inferred from co-occurrence in time and space: Given that two people have been in approximately the same geographic locale at approximately the same time, on multiple occasions, how likely are they to know each other? Furthermore, how does this likelihood depend on the spatial and temporal proximity of the co-occurrences? Such issues arise in data originating in both online and offline domains as well as settings that capture interfaces between online and offline behavior. Here we develop a framework for quantifying the answers to such questions, and we apply this framework to publicly available data from a social media site, finding that even a very small number of co-occurrences can result in a high empirical likelihood of a social tie. We then present probabilistic models showing how such large probabilities can arise from a natural model of proximity and co-occurrence in the presence of social ties. In addition to providing a method for establishing some of the first quantifiable estimates of these measures, our findings have potential privacy implications, particularly for the ways in which social structures can be inferred from public online records that capture individuals’ physical locations over time. PMID:21148099

  5. Geographic location considered in PVT calculation program

    SciTech Connect

    Elsharkawy, A.M.; El-Mater, D. [Kuwait Univ. (Kuwait)

    1996-01-22

    A computer program was developed to calculate hydrocarbon fluid properties from a variety of geographical locations. For any given area of the world, one correlation may be better than another. The program`s calculations are based on published pressure-volume-temperature (PVT) correlations. The program will run on an IBM compatible personal computer. The properties calculated include solution gas/soil ratio, oil formation volume factor, crude oil viscosity, gas deviation factor, gas formation volume factor, and gas viscosity. The program includes most of the well known correlations as well as the recently developed ones for estimating properties of saturated crude oil in several different areas of the world. The mathematical functions represent the best fit for estimating the gas properties from empirical data. The fluid properties obtained can be used for formation evaluation of hydrocarbon reservoirs, reserve calculations, reservoir performance predictions, production operations, and production facility design. The program can also be used in research work for assessing published correlations that predict the properties of a given crude whose laboratory PVT data are known. Program input data include the number of data points, calculation option for saturated crudes, reservoir pressure, API crude oil gravity, gas specific gravity, reservoir temperature. Output from the program can be stored in a data file for later use or printed on the screen.

  6. APTITUD FÍSICA DE TRES CLASES DE SUELOS A TRES PASTOS, EN LA PLANICIE DEL RÍO MOTATÁN, ESTADO TRUJILLO, VENEZUELA Physical suitability of the three soil class to three grass of the River Motatan lowlands, Trujillo State, Venezuela

    Microsoft Academic Search

    Neida Pineda; Edgar Jaimes; Graciano Elizalde; Guido Ochoa

    2002-01-01

    Physical suitability of three soil classes previously identified in groups and characterized through a methodology, that enables agricultural technicians and experienced farmers to define group of soils in a more understandable way, was determined. The study area covered 30,365 hectares of an alluvial sector in the Motatan River lowlands, Trujillo state, Venezuela. Land Evaluation was made using the maximum limitation

  7. VALORES BIOQUÍMICOS EN SANGRE DE LA TORTUGA VERDE (Chelonia mydas) PRESENTES EN LA ALTA GUAJIRA, VENEZUELA Blood Biochemistry Values of Green Turtle (Chelonia mydas) Present in the Alta Guajira, Venezuela

    Microsoft Academic Search

    Jim L. Hernández; Alfonso R. Bravo; Vicente J. Vera; Johan F. Mesa

    2008-01-01

    Sea turtles have been widely investigated and reviewed over the last decades. Blood biochemistry represents a valuable di- agnostic tool for monitoring the health condition of wildlife. The aim of this study was to determine the blood biochemistry val- ues of green turtles (Chelonia mydas) present in the Alta Gua- jira, Venezuela. Blood samples were collected of the dorsal cervical

  8. Importancia de las plantas medicinales en el autocuidado de la salud en tres caseríos de Santa Ana Trujillo, Venezuela. The importance of medicinal plants in health care in three small villages of the Santa Ana county at Trujillo state, Venezuela

    Microsoft Academic Search

    TEOLINDA CARRILLO-ROSARIO Y GLENDA

    In order to gather some information about the importance of medicinal plants in the primary health care, the use of plants in three small villages of the Santa Ana county, Pampán municipality at Trujillo State, Venezuela, was quantitatively analyzed. To do this, a local epidemiology diagnosis was carried out and the etnopharmacological information obtained was recorded using the TRAMIL survey.

  9. Statistical Significance of Geographic Heterogeneity Measures In Spatial Epidemiologic Studies

    PubMed Central

    Lian, Min

    2015-01-01

    Assessing geographic variations in health events is one of the major tasks in spatial epidemiologic studies. Geographic variation in a health event can be estimated using the neighborhood-level variance that is derived from a generalized mixed linear model or a Bayesian spatial hierarchical model. Two novel heterogeneity measures, including median odds ratio and interquartile odds ratio, have been developed to quantify the magnitude of geographic variations and facilitate the data interpretation. However, the statistical significance of geographic heterogeneity measures was inaccurately estimated in previous epidemiologic studies that reported two-sided 95% confidence intervals based on standard error of the variance or 95% credible intervals with a range from 2.5th to 97.5th percentiles of the Bayesian posterior distribution. Given the mathematical algorithms of heterogeneity measures, the statistical significance of geographic variation should be evaluated using a one-tailed P value. Therefore, previous studies using two-tailed 95% confidence intervals based on a standard error of the variance may have underestimated the geographic variation in events of their interest and those using 95% Bayesian credible intervals may need to re-evaluate the geographic variation of their study outcomes. PMID:25745590

  10. 47 CFR 64.1900 - Nondominant interexchange carrier certifications regarding geographic rate averaging and rate...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...regarding geographic rate averaging and rate integration requirements. 64.1900 Section...Regarding Geographic Rate Averaging and Rate Integration Requirements § 64.1900 Nondominant...regarding geographic rate averaging and rate integration requirements. (a) A...

  11. 47 CFR 64.1801 - Geographic rate averaging and rate integration.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Geographic rate averaging and rate integration. 64.1801 Section 64.1801... Geographic Rate Averaging and Rate Integration § 64.1801 Geographic rate averaging and rate integration. (a) The rates charged...

  12. 48 CFR 1852.244-70 - Geographic participation in the aerospace program.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 true Geographic participation in the...Regulations System NATIONAL AERONAUTICS AND SPACE...following clause: Geographic Participation in the...is the policy of the National Aeronautics and Space...participation by all geographic regions in...

  13. A multi-agent system architecture for geographic information gathering.

    PubMed

    Gao, Gang-Yi; Wang, Shen-Kang

    2004-11-01

    World Wide Web (WWW) is a vast repository of information, including a great deal of geographic information. But the location and retrieval of geographic information will require a significant amount of time and effort. In addition, different users usually have different views and interests in the same information. To resolve such problems, this paper first proposed a model of geographic information gathering based on multi-Agent (MA) architecture. Then based on this model, we construct a prototype system with GML (Geography Markup Language). This system consists of three tiers-Client, Web Server and Data Resource. Finally, we expatiate on the process of Web Server. PMID:15495329

  14. Paleogeographic evolution of foldbelts adjacent to petroleum basins of Venezuela and Trinidad

    SciTech Connect

    Goodman, E.D.; Koch, P.S.; Summa, L.L. [Exxon Production Research Company, Houston, TX (United States)] [and others

    1996-08-01

    The foldbelts of Venezuela and Trinidad have shaped the history of adjacent sedimentary basins. A set of paleogeographic maps on reconstructed bases depict the role of foldbelts in the development of the sedimentary basins of Venezuela. Some of the foldbelts are inverted, pre-Tertiary graben/passive margin systems. Other foldbelts are allochthonous nappes or parautochthons that override the Mesozoic passive margin hinge without inversion. The emergence of these foldbelts changed the course of existing river systems and provided a new source for sediments and maturation in adjacent deeps. The Merida Andes area was remobilized beginning in the Early Miocene as a zone of lateral shear, along which the Bonaire Block has moved over 200 km to the northeast, dismembering the Maracaibo and Barinas basins. Late Miocene to Recent transpression and fault reactivation have driven rapid Andean uplift with thrust-related subsidence and maturation (e.g., SE Maracaibo foredeep). To the east, uplift and erosion of the Serrania del Interior (1) curtailed mid-Tertiary fluvial systems flowing northward from the igneous and sedimentary rocks of the Guyana Shield, deflecting them eastward, and (2) removed the thick early Miocene foredeep fill into a younger foredeep. Thus, the fold-thrust belts and sedimentary basins in this region are linked in their evolutionary histories.

  15. Is Rhodnius robustus (Hemiptera: Reduviidae) responsible for Chagas disease transmission in Western Venezuela?

    PubMed

    Feliciangeli, M Dora; Dujardin, Jean-Pierre; Bastrenta, Brigitte; Mazzarri, Milena; Villegas, Judith; Flores, Maria; Muñoz, Maruska

    2002-03-01

    We present evidence for the putative role of Rhodnius robustus as extradomestic vector of Chagas disease in Western Venezuela. First, we assessed the validity of this triatomine species by genetic characterization in relation with some other species of the prolixus group. Random amplified polymorphic DNA data showed a clear separation between this species and R. prolixus and indicated a probable genetic heterogeneity within R. robustus. Faeces and gut contents were microscopically examined in 54 of 137 R. robustus collected in palm trees. According to this morphological examination, 18% were positive for Trypanosoma cruzi, 11% harboured T. rangeli and 11% showed mixed infection. Five of the seven samples examined gave a polymerase chain reaction major band of 270 bp specific of T. cruzi. The hybridization probes showed that R. robustus may transmit clones 20 and 39 (or genetically related ones) in Venezuela. Such a transmission might occur when, in absence of domestic R. prolixus and attracted by artificial light, R. robustus enters houses and feeds on humans, or when people are bitten outdoors. The lack of bugs inside houses could mean that the insects leave houses after feeding, or die without reproducing there. PMID:11903991

  16. Comparative federal health care policy: evidence of collaborative federalism in Pakistan and Venezuela.

    PubMed

    Baracskay, Daniel

    2013-01-01

    Collaborative federalism has provided an effective analytical foundation for understanding how complex public policies are implemented in federal systems through intergovernmental and intersectoral alignments. This has particularly been the case in issue areas like public health policy where diseases are detected and treated at the local level. While past studies on collaborative federalism and health care policy have focused on federal systems that are largely democratic, little research has been conducted to examine the extent of collaboration in authoritarian structures. This article applies the collaborative federalism approach to the Islamic Republic of Pakistan and the Bolivarian Republic of Venezuela. Evidence suggests that while both nations have exhibited authoritarian governing structures, there have been discernible policy areas where collaborative federalism is embraced to facilitate the implementation process. Further, while not an innate aspect of their federal structures, Pakistan and Venezuela can potentially expand their use of the collaborative approach to successfully implement health care policy and the epidemiological surveillance and intervention functions. Yet, as argued, this would necessitate further development of their structures on a sustained basis to create an environment conducive for collaborative federalism to flourish, and possibly expand to other policy areas as well. PMID:24350551

  17. Production optimization of sucker rod pumping wells producing viscous oil in Boscan field, Venezuela

    SciTech Connect

    Guirados, C.; Sandoval, J.; Rivas, O.; Troconis, H.

    1995-12-31

    Boscan field is located in the western coast of Maracaibo lake and is operated by Maraven S.A., affiliate of Petroleos de Venezuela S.A. It has 315 active wells, 252 of which are produced with sucker rod pumping. Other artificial lift methods currently applied in this field are hydraulic (piston) pumping (39 wells) and ESP (24 wells). This paper presents the results of the production optimization of two sucker rod pumping wells of Boscan field producing viscous oil. This optimization has been possible due to the development of a new production scheme and the application of system analysis in completion design. The new production scheme involves the utilization of a subsurface stuffing box assembly and a slotted housing, both designed and patented by Intevep S.A., affiliate of Petroleos de Venezuela S.A. The completion design method and software used in the optimization study were also developed by Intevep S.A. The new production scheme and design method proved to be effective in preventing the causes of the above mentioned problems, allowing the increase of oil production under better operating conditions.

  18. Situation Report--Burma, Chile, German Democratic Republic, Indonesia, Jamaica, Poland, Singapore, St. Christopher/Nevis, Trinidad & Tobago, Venezuela.

    ERIC Educational Resources Information Center

    International Planned Parenthood Federation, London (England).

    Data relating to population and family planning in ten foreign countries are presented in these situation reports. Countries included are Burma, Chile, German Democratic Republic, Indonesia, Jamaica, Poland, Singapore, St. Christopher/Nevis, Trinidad and Tobago, and Venezuela. Information is provided, where appropriate and available, under two…

  19. Preliminary assessment of a Cretaceous-Paleogene Atlantic passive margin, Serrania del Interior and Central Ranges, Venezuela/Trinidad

    SciTech Connect

    Pindell, J.L.; Drake, C.L. (Dartmouth College, Hanover, NH (United States)); Pitman, W.C. (Lamont-Doherty Geological Observatory, Palisades, NY (United States))

    1991-03-01

    For several decades, Cretaceous arc collision was assumed along northern Venezuela based on isotopic ages of metamorphic minerals. From subsidence histories in Venezuelan/Trinidadian basins, however, it is now clear that the Cretaceous metamorphic rocks were emplaced southeastward as allochthons above an autochthonous suite of rocks in the Cenozoic, and that the pre-Cenozoic autochthonous rocks represent a Mesozoic passive margin. The passive margin rocks have been metamorphosed separately during overthrusting by the allochthons in central Venezuela, but they are uplifted but not significantly metamorphosed in Eastern Venezuela and Trinidad. There, in the Serrania del Interior and Central Ranges of Venezuela/Trinidad, Mesozoic-Paleogene passive margin sequences were uplifted in Neogene time, when the Caribbean Plate arrived from the west and transpressionally inverted the passive margin. Thus, this portion of South America's Atlantic margin subsided thermally without tectonism from Jurassic to Eocene time, and these sections comprise the only Mesozoic-Cenozoic truly passive Atlantic margin in the Western Hemisphere that is now exposed for direct study. Direct assessments of sedimentological, depositional and faunal features indicative of, and changes in, water depth for Cretaceous and Paleogene time may be made here relative to a thermally subsiding passive margin without the complications of tectonism. Work is underway, and preliminary assessments presented here suggest that sea level changes of Cretaceous-Paleogene time are not as pronounced as the frequent large and rapid sea level falls and rises that are promoted by some.

  20. Seismic Anisotropy and Mantle flow beneath Western Venezuela Jeniffer Masy,1 Fenglin Niu1 and Alan Levander1

    E-print Network

    Alvarez, Pedro J.

    Seismic Anisotropy and Mantle flow beneath Western Venezuela Jeniffer Masy,1 Fenglin Niu1 and Alan are large and can be interpreted as eastward mantle flow beneath the Caribbean plate. 2. Along. Seismic anisotropy has been widely used to measure upper mantle deformation from past and present orogenic

  1. Oil in Venezuela: Triggering Violence or Ensuring Stability? A Context-sensitive Analysis of the Ambivalent Impact of Resource Abundance

    Microsoft Academic Search

    Annegret Mähler

    2009-01-01

    This paper studies the causal factors that make the oil-state Venezuela, which is generally characterized by a low level of violence, an outlier among the oil countries as a whole. It applies a newly elaborated “context approach” that systematically considers domestic and international contextual factors. To test the results of the systematic analysis, two periods with a moderate increase in

  2. Detection and Characterization of Waterborne Gastroenteritis Viruses in Urban Sewage and Sewage-Polluted River Waters in Caracas, Venezuela

    Microsoft Academic Search

    J. Rodriguez-Diaz; L. Querales; L. Caraballo; E. Vizzi; F. Liprandi; H. Takiff; W. Q. Betancourt

    2009-01-01

    The detection and molecular characterization of pathogenic human viruses in urban sewage have been used extensively to derive information on circulating viruses in given populations throughout the world. In this study, a similar approach was applied to provide an overview of the epidemiology of waterborne gastroenteritis viruses circulating in urban areas of Caracas, the capital city of Venezuela in South

  3. Molecular characterisation of Mycobacterium tuberculosis isolates in the First National Survey of Antituberculosis Drug Resistance from Venezuela

    Microsoft Academic Search

    Liselotte Aristimuño; Raimond Armengol; Alberto Cebollada; Mercedes España; Alexis Guilarte; Carmen Lafoz; María A Lezcano; María J Revillo; Carlos Martín; Carmen Ramírez; Nalin Rastogi; Janet Rojas; Albina Vázques de Salas; Christophe Sola; Sofía Samper

    2006-01-01

    BACKGROUND: Molecular typing of Mycobacterium tuberculosis strains has become a valuable tool in the epidemiology of tuberculosis (TB) by allowing detection of outbreaks, tracking of epidemics, identification of genotypes and transmission events among patients who would have remained undetected by conventional contact investigation. This is the first genetic biodiversity study of M. tuberculosis in Venezuela. Thus, we investigated the genetic

  4. Population, Land Use and Deforestation in the Pan Amazon Basin: a Comparison of Brazil, Bolivia, Colombia, Ecuador, Perú and Venezuela

    Microsoft Academic Search

    Stephen G. Perz; Carlos Aramburú; Jason Bremner

    2005-01-01

    This paper discusses the linkages between population change, land use, and deforestation in the Amazon regions of Brazil, Bolivia, Colombia, Ecuador, Perú, and Venezuela. We begin with a brief discussion of theories of population–environment linkages, and then focus on the case of deforestation in the PanAmazon. The core of the paper reviews available data on deforestation, population growth, migration and

  5. Biocomplexity of deforestation in the Caparo tropical forest reserve in Venezuela: An integrated multi-agent and cellular automata model

    Microsoft Academic Search

    Niandry Moreno; Raquel Quintero; Magdiel Ablan; Rodrigo Barros; Jacinto A. Dávila; Hirma Ramírez; Giorgio Tonella; Miguel F. Acevedo

    2007-01-01

    A multi-agent model of social and environmental complexity of deforestation was developed for the Caparo Forest Reserve, Venezuela. It includes three types of agents: settlers, government, and lumber concessionaires. Settlers represent people of limited economic resources that deforest and occupy reserve land to grow crops and eventually claim property rights of this land. Their agricultural practices generate unintended environmental problems.

  6. Interactive LORAN-C to geographic and geographic-to-LORAN-C computation

    NASA Technical Reports Server (NTRS)

    Piecuch, L. M.; Lilley, R. W.

    1977-01-01

    The LORAN program is stored in CMS disk files for use by Avionics Engineering Center terminal users. A CMS EXEC file named LORAN controls program operation. The user types LORAN and the program then prompts for data input and produces output on the terminal. The FORTRAN program refers to a disk file of LORAN master data giving station locations, coding delays, repetition rate and station pair identification letters. For Geographic-to-LORAN conversion, no iterative computations are required; the program is a straightforward coordinate conversion based upon the techniques described by the Navy. For LORAN-to-Geographic conversion, the original Navy program required a dead-reckoned position, near the actual unknown fix, to begin computations. No iteration was performed to obtain the LORAN fix, but internal program errors occurred at execution time if the dead-reckoned fix were displaced from the actual fix by more than a few minutes of latitude or longitude. In order to enhance usefulness of the program for the terminal user, an iterative routine was added which allows a single dead-reckoned position to be entered from the master data file for each LORAN chain. The results compare exactly with the LORAN-C navigation chart, and provide adequate benchmark data for general aviation flight planning and data analysis.

  7. Geographic Information Systems & Science - The National Cancer Institute

    Cancer.gov

    The Geographic Information Systems and Science website is supported by the National Cancer Institute as a central source of information about GIS and related resources for use by the public, cancer researchers, and the GIS Special Interest Group.

  8. Geographically Distributed Development : trends, challenges and best practices

    E-print Network

    Yin, Yuhong

    2007-01-01

    Economic and market forces as well as technological progress emerging throughout the last decade signifies the Geographically Distributed Development (GDD) or Global Software Development (GSD) as a software industry norm ...

  9. DIVISION OF INFECTIOUS DISEASES AND GEOGRAPHIC MEDICINE DEPARTMENT OF MEDICINE

    E-print Network

    Kay, Mark A.

    DIVISION OF INFECTIOUS DISEASES AND GEOGRAPHIC MEDICINE DEPARTMENT OF MEDICINE 300 PASTEUR DRIVE, S board exam that allows them to prescribe and practice medicine. Within career in Internal medicine/Pediatrics working with an underserved population. She

  10. DIVISION OF INFECTIOUS DISEASES AND GEOGRAPHIC MEDICINE DEPARTMENT OF MEDICINE

    E-print Network

    Kay, Mark A.

    DIVISION OF INFECTIOUS DISEASES AND GEOGRAPHIC MEDICINE DEPARTMENT OF MEDICINE 300 PASTEUR DRIVE, S board exam that allows them to prescribe and practice medicine. Within in internal medicine but upon coming to Stanford in 1991, began a long

  11. 11.520 Workshop on Geographic Information Systems, Fall 2002

    E-print Network

    Ferreira, Joseph

    This class uses lab exercises and a workshop setting to help students develop a solid understanding of the planning and public management uses of geographic information systems (GIS). The goals are to help students: Acquire ...

  12. Thermal adaptation of maternal and embryonic phenotypes in a geographically

    E-print Network

    Angilletta, Michael

    Thermal adaptation of maternal and embryonic phenotypes in a geographically widespread ectotherm, NV 89557, USA Abstract. Current theories predict the thermal adaptation of both maternal and development, although this behavior involves risky migrations. Likewise, thermal adaptation of embryonic

  13. 13 CFR 108.130 - Identified Low Income Geographic Areas.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...Organizing A Nmvc Company § 108.130 Identified Low Income Geographic Areas. A NMVC Company must identify the specific LI Areas in which it intends to make Developmental Venture Capital investments and provide Operational Assistance under the NMVC...

  14. Thoracic trident pigmentation in Drosophila melanogaster : Differentiation of geographical populations

    E-print Network

    Paris-Sud XI, Université de

    Thoracic trident pigmentation in Drosophila melanogaster : Differentiation of geographical A phenotypic classification of trident pigmentation allowed the characterization ol any natural population by a pigmentation score, ranging from 0 to 3. After some training, independent observers could produce very similar

  15. The Region as a Geographical, Economic and Cultural Concept.

    ERIC Educational Resources Information Center

    Claval, Paul

    1987-01-01

    Examines the concept of geographic region, tracing its development in geography, economics, and other social science disciplines. Concludes that while the concept has been "relativized," its meaning has been enormously enriched in the past 30 years. (JDH)

  16. Order from noise: Toward a social theory of geographic information

    USGS Publications Warehouse

    Poore, B.S.; Chrisman, N.R.

    2006-01-01

    In the so-called Information Age, it is surprising that the concept of information is imprecisely defined and almost taken for granted. Historic and recent geographic information science (GIScience) literature relies on two conflicting metaphors, often espoused by the same author in adjacent paragraphs. The metaphor of invariance, derived from telecommunications engineering, defines information as a thing to be transported without loss through a conduit. Another metaphor, originating in the utopian movements of the 19th century, locates information within a hierarchy of refinement-a stopping place on the path to convert mere data into higher forms of knowledge and perhaps to wisdom. Both metaphors rely on long-forgotten debates outside geography and preclude us from seeing that there are important social and ethical concerns in the relationship between geographic information technologies and society. We examine the conflicts between competing metaphors and propose a social theory of geographic information. ?? 2006 by Association of American Geographers.

  17. Fast Food, Race\\/Ethnicity, and Income A Geographic Analysis

    Microsoft Academic Search

    Jason P. Block; Richard A. Scribner; Karen B. DeSalvo

    2004-01-01

    Methods: Using geographic information system software, all fast-food restaurants within the city limits of New Orleans, Louisiana, in 2001 were mapped. Buffers around census tracts were generated to simulate 1-mile and 0.5-mile \\

  18. Geographic searching for ecological studies: A new frontier

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Important ecological knowledge contained in published literature is often overlooked by researchers, resource managers, and policymakers in part because most literature search tools are thematically focused and do not explicitly consider the geographic location of the research. Searching for ecologi...

  19. Geographic Information Systems as a Tool to Support Monitoring and

    E-print Network

    intensive forestry and functional green infrastructure require involvement of different sectors for planning demonstrates a zoning approach to identify green infrastructures and areas suitable for intensive forestry: assessment, Geographic Information Systems, green infrastructure, indicators, intensive forestry, landscape

  20. Geographical location in the information age: from destiny to opportunity?

    Microsoft Academic Search

    Aharon Kellerman; Maria Paradiso

    2007-01-01

    This article argues for a possibly new significance of geographical location in the information age, a significance amounting\\u000a to more than mere spatial anchoring, on the one hand, and to less and different than absolute destiny, on the other. Hence,\\u000a we show a possible change in the significance of geographical location from destiny in the industrial age to potential opportunity

  1. A development of the Geographical Information Projects Index in line with the Scottish Geographic Information Strategy: “One Scotland One Geography.” 

    E-print Network

    Bruce, David

    2008-12-04

    In 2006, a partnership between The University of Edinburgh, The Scottish Government and The Association of Geographic Information in Scotland lead to the production of an online service designed to encourage diffusion of ...

  2. Settlement patterns in the eastern coast of Maracaibo Lake, Venezuela : evaluation of existing settlements and model for a low income sector of El Menito new town

    E-print Network

    Rodriguez Navas, Humberto José

    1983-01-01

    This thesis is divided in two parts; The First part is the physical analysis of residential settlements in the Eastern Coast of Maracaibo Lake, Venezuela. The work is based on surveys, evaluations and comparisons of four ...

  3. Geographic range size and extinction risk assessment in nomadic species.

    PubMed

    Runge, Claire A; Tulloch, Ayesha; Hammill, Edd; Possingham, Hugh P; Fuller, Richard A

    2015-06-01

    Geographic range size is often conceptualized as a fixed attribute of a species and treated as such for the purposes of quantification of extinction risk; species occupying smaller geographic ranges are assumed to have a higher risk of extinction, all else being equal. However many species are mobile, and their movements range from relatively predictable to-and-fro migrations to complex irregular movements shown by nomadic species. These movements can lead to substantial temporary expansion and contraction of geographic ranges, potentially to levels which may pose an extinction risk. By linking occurrence data with environmental conditions at the time of observations of nomadic species, we modeled the dynamic distributions of 43 arid-zone nomadic bird species across the Australian continent for each month over 11 years and calculated minimum range size and extent of fluctuation in geographic range size from these models. There was enormous variability in predicted spatial distribution over time; 10 species varied in estimated geographic range size by more than an order of magnitude, and 2 species varied by >2 orders of magnitude. During times of poor environmental conditions, several species not currently classified as globally threatened contracted their ranges to very small areas, despite their normally large geographic range size. This finding raises questions about the adequacy of conventional assessments of extinction risk based on static geographic range size (e.g., IUCN Red Listing). Climate change is predicted to affect the pattern of resource fluctuations across much of the southern hemisphere, where nomadism is the dominant form of animal movement, so it is critical we begin to understand the consequences of this for accurate threat assessment of nomadic species. Our approach provides a tool for discovering spatial dynamics in highly mobile species and can be used to unlock valuable information for improved extinction risk assessment and conservation planning. PMID:25580637

  4. Training Hybrid Neuro-Fuzzy System to Infer Permeability in Wells on Maracaibo Lake, Venezuela

    E-print Network

    Hurtado, Nuri; Torres, Julio

    2014-01-01

    The high accuracy on inferrring of rocks properties, such as permeability ($k$), is a very useful study in the analysis of wells. This has led to development and use of empirical equations like Tixier, Timur, among others. In order to improve the inference of permeability we used a hybrid Neuro-Fuzzy System (NFS). The NFS allowed us to infer permeability of well, from data of porosity ($\\phi$) and water saturation ($Sw$). The work was performed with data from wells VCL-1021 (P21) and VCL-950 (P50), Block III, Maracaibo Lake, Venezuela. We evaluated the NFS equations ($k_{P50,i}(\\phi_i,Sw_i)$) with neighboring well data ($P21$), in order to verify the validity of the equations in the area. We have used ANFIS in MatLab.

  5. [Communicative approach of Situational Strategic Planning at the local level: health and equity in Venezuela].

    PubMed

    Heredia-Martínez, Henny Luz; Artmann, Elizabeth; Porto, Silvia Marta

    2010-06-01

    The article discusses the results of operationalizing Situational Strategic Planning adapted to the local level in health, considering the communicative approach and equity in a parish in Venezuela. Two innovative criteria were used: estimated health needs and analysis of the actors' potential for participation. The problems identified were compared to the corresponding article on rights in the Venezuelan Constitution. The study measured inequalities using health indicators associated with the selected problems; equity criteria were incorporated into the action proposals and communicative elements. Priority was assigned to the problem of "low case-resolving capacity in the health services network", and five critical points were selected for the action plan, which finally consisted of 6 operations and 21 actions. The article concludes that the combination of epidemiology and planning expands the situational explanation. Incorporation of the communicative approach and the equity dimension into Situational Strategic Planning allows empowering health management and helps decrease the gaps from inequality. PMID:20657984

  6. [Characteristics of canopy plant substratum in a low land humid tropical forest (Upper Orinoco, Venezuela)].

    PubMed

    Hernández-Rosas, José Ibrahin

    2004-01-01

    By international agreement (Austria-Venezuela) a tower crane was installed near Surumoni river, Upper Orinoco, for canopy research in a tropical rain forest. From the 1.5 ha crane-accessible area of the forest, an experimental plot was selected for assessment of the canopy plants' aerial substrates and to determine their relationship with spatial distribution, presence or absence of vascular plants, and some of the strategies used in their ecological space. In the middle and lower canopy strata myrmecophytic associations appear, where the conformation of the aerial substrates determines the establishment and maintenance of these associations. The high content of nutrients of these aerial substrata represents a reservoir for the forest, where the mirmecophytic activity is determining. A higher fertility of aerial substrates of the ants gardens can be related to a higher number of vascular epiphytes present in these gardens. PMID:15916163

  7. Cretaceous and Tertiary palynology used in the geological understanding of the Maturin sub-basin, Venezuela

    SciTech Connect

    Paredes, I.; Fasola, A. (Intevep, S.A., Caracas (Venezuela))

    1991-03-01

    The use of palynology and micropaleontology, two biostratigraphic tools used at Intevep, S.A., have been of great help in the geological understanding during studies done on cores of the Maturin subbasin, a foreland type basin in Eastern Venezuela. Basically, the palynological work consisted of palynological and palynofacies analysis used to determine ages and to interpret the paleoenvironments of deposition in comparison with the interpretations obtained through sedimentological and micropaleontological studies. Palynomorph assemblages and palynofacies are shown for the quiescent Late Cretaceous, for the Tertiary in sequences that are not exactly dated and probably represent the first compressive movements in the basin, and for the Oligocene. In general, in these sequences it was possible to determine marine environments varying from near-shore to inner neritic, and also subaereal paleosols in the Cretaceous. The work highlights the importance of multidisciplinary studies in order to obtain interpretations more in accordance with reality.

  8. Agaporomorphus sharynae, a new species of diving beetle (Coleoptera: Dytiscidae: Copelatinae) from Venezuela.

    PubMed

    Miller, Kelly B

    2014-01-01

    Agaporomorphus sharynae sp. n. is described from Amazonas, Venezuela. Agaporomorphus Zimmermann, 1921 now includes nine known species. The new species is part of the A. knishi species group since it has similarly convoluted male genitalia with rows of setae on the dorsal surface. Males can be separated from those of other members of the genus by the structure of the abdominal ventrites, shape of the antennae, and shape of the male median lobe. The cladistic analysis of K.B. Miller & Wheeler (2008) is modified to include the new species. The habitus and male and female genitalia are illustrated, and male genitalia of other species of the A. knishi species group are illustrated for comparison. PMID:24869866

  9. A revision of the Larainae (Coleoptera, Elmidae) of Venezuela, with description of nine new species

    PubMed Central

    Maier, Crystal A.

    2013-01-01

    Abstract The species of the riffle beetle subfamily Larainae occurring in Venezuela are revised. Examination of 756 specimens yielded 22 species in nine genera occurring throughout the country. Seven species are newly recorded from the country: Phanoceroides sp. 1, Phanocerus clavicornis Sharp, 1882, Phanocerus congener Grouvelle, 1898, Pharceonus volcanus Spangler & Santiago-Fragoso, 1992, Disersus dasycolus Spangler & Santiago-Fragoso, 1992, Disersus chibcha Spangler & Santiago-Fragoso, 1987, and Disersus inca Spangler & Santiago-Fragoso, 1992. Nine species are found to be new to science, which are here described: Hexanchorus dentitibialis sp. n., H. falconensis sp. n., H. flintorum sp. n., H. homaeotarsoides sp. n., H. inflatus sp. n., Phanocerus rufus sp. n., Pharceonus grandis sp. n., Pharceonus ariasi sp. n., Potamophilops bostrychophallus sp. n. Additionally, a key to species, distribution maps, and photographs and genitalia illustrations are provided for all species. PMID:24146552

  10. GPS-derived slip rates of active faults in eastern Venezuela, along the southeastern Caribbean PBZ

    NASA Astrophysics Data System (ADS)

    Audemard, F. A.; Beck, C.; Jouanne, F.; Reinoza, C. E.; Fegag

    2013-05-01

    For over 20 years, GPS campaign measurements have been performed in eastern Venezuela, as well as in other areas of the country, by different scientific groups and in the frame of different either national or international efforts and/or projects, essentially aiming at the estimation of the rate of motion along the major Quaternary faults (i.e., Boconó, San Sebastián and El Pilar faults) composing the plate boundary zone (PBZ) between the Caribbean and South America, along onshore northern and western Venezuela. The slip rates and sense of slip of those major faults derived from the comparison of several GPS campaigns carried out through the years have confirmed the slip data (fault kinematics) previously derived from geologic data, through comprehensive neotectonic and paleoseismic studies mainly made by the FUNVISIS' Earth Sciences Dpt. staff. In a rough way, we could conclude that those faults are dextrally moving at a rate in the order of 10-12 mm/a. More recently, it has been shown that the El Pilar fault has a locking depth close to 10 km deep and that about half of the PBZ dextral motion is accommodated as creep, reducing the seismic hazard for northeastern Venezuela almost by half. On the contrary, in the near past, very little attention has been paid to the secondary active faulting in eastern Venezuela. In that sense, FUNVISIS, in collaboration with the Université de Savoie, started the monitoring of these secondary features by installing 36 brass benchmarks on bedrock in that region in 2003, which have been occupied 3 times, in late 2003 and 2005 and in early 2013. The comparison between the 2003 and 2005 occupations shows promising results, such as: a) The Charagato fault on Cubagua island is left-lateral with a slip rate of about 2 mm/a; b) slip vectors across the El Pilar fault tend to head to the ESE, suggesting that the tectonic regime is compressive transcurrent to transcurrent compressional (transpressional); c) The NW-SE-trending San Francisco fault, in the eastern Interior range, appears to be dextral with a preliminary slip rate of few mm/a; d) the Northern Coast fault, paralleling the El Pilar fault, is also dextral and slips at about 2 mm/a and e) a similar situation seems to display the San Sebastián fault in the Gulf of Cariaco, north of Cumaná, near its eastern tip. We expect that the 2013 occupation, carried out over 9 years later than the first one, will allow estimating more accurately the slip rates of the slower subordinate active faults of the region. This is a contribution to cooperation projects FONACIT-ECOS Nord PI-2003000090 and -2009000818 (French codes V04U01 and V10U01, respectively), French DyETI Programme, as well as Venezuelan FONACIT 2002000478 (GEODINOS) and LOCTI (Cumaná and GIAME) projects. Michel Bechtold, Victor Cano, Luis Melo, Reinaldo Ollarves, Fabián Rada, José Antonio Rodríguez, Javier Sánchez and Aurelien Van Welden are contributing FEGAG members.

  11. Altitude determination and descriptive analysis of clouds on ERTS-1 multispectral photography. [Venezuela

    NASA Technical Reports Server (NTRS)

    Albrizzio, C.; Andressen, A.

    1974-01-01

    A simple method to determine the approximate altitude of clouds is described, with the objective of refining their classification using only marginal data from the photographs. Results of the application of this method on photographs of the Goajira Peninsula, Paraguana Peninsula and the Central Coast of Venezuela are presented. Here, the altitudes computed are used to classify clouds and to identify the genus of others without typical form. Instability of air masses through clouds vertical development, and wind direction as well as other local climatic characteristics such as moisture content, loci of condensation, area, etc. are determined using repetitive coverage for the time interval of the photography. Applications for the regional and urban planning (including airport location and flights schedule) and natural resources evaluation are suggested.

  12. [Protection of mangroves in Venezuela and its impact on environment management: retrospective].

    PubMed

    Sebastiani, M; Villamizar, A; Olivo, M L

    1996-01-01

    In Venezuela, the law protects mangroves specifically. This paper is a retrospective review of the existing regulations on mangrove to find out: how has it been protected?; which have been the results of different approaches followed to do so?; which could be the problems for its protection in the near future? The result from the analysis indicates that regulations should not protect a specific mangrove species. The focal point on the regulation should be the protection of mangrove, as well as the vital relationships between this landscape unit and the existing others. Therefore, decisions of mangrove should be proposed as part of a plan for the basin where it belongs. Intervention on mangrove must be based on expert judgement, due to high uncertainty about the success of corrective or mitigative actions. PMID:9433824

  13. Methane production from mixed tropical savanna and forest vegetation in Venezuela

    NASA Astrophysics Data System (ADS)

    Crutzen, P. J.; Sanhueza, E.; Brenninkmeijer, C. A. M.

    2006-04-01

    Measurements of methane concentrations in the boundary layer in the northern part of the Guayana shield, Venezuela, during the wet season (October 1988), showed the presence of substantial methane surface emissions. The measuring site is within the savanna climate region, but is affected by emissions from savanna and forest vegetation. From day versus night concentration measurements, with higher concentrations during night, a methane source strength near the site of 3-7×1011 molecules/cm2/s can be estimated, which includes emissions from small tracts of flooded soils, termites and especially tropical vegetation. Extrapolated to the entire savanna, this may imply a methane source of ~30-60 Tg yr-1 similar to the one calculated for tropical vegetation on the basis of recently published in vitro plant emission experiments by Keppler et al. (2006), which indicate emissions of ~30 Tg yr-1 for tropical savannas and grasslands and ~78 Tg yr-1 for tropical forests.

  14. Data access, charging and copyright and their implications for geographical information systems

    Microsoft Academic Search

    David Rhind

    1992-01-01

    Few geographical information systems generate all their own data. As geographical or spatial data are the fuel of such systems, the availability, access and price of data sets held by others becomes a matter of considerable importance. In this context, geographical information systems form only a special case of information systems in general, but geographical data are increasingly part of

  15. Geographical Cells: Location-Aware Adaptive Routing Scheme for Ad-Hoc Networks

    Microsoft Academic Search

    Michal Kudelski; Andrzej Pacut

    2007-01-01

    We introduce an novel approach to information management in ad-hoc networks, based on geographical cells concept. Geographical cells are used to comprise the information within the geographical location. We apply this approach to solve the problem of routing in ad-hoc networks for various mobility models. We show that the geographical cells approach may improve the overall performance of the underlying

  16. Research on cooperative distributed geographic modeling control pattern based on Holon

    Microsoft Academic Search

    Hui Yang; Guonian Lv; Yehua Sheng

    2010-01-01

    The cooperative distributed geographic modeling has become a hotspot of Geographic Information Systems (GIS) research field. This paper introduces the architecture of the Cooperative Distributed Geographic Modeling (CDGM) control pattern based on Holon, studies the distributed control on the existing spatial data and the geographic models, which are gotten from different regions and belong to different institutes. The CDGM control

  17. Allele and haplotype frequencies at human leukocyte antigen class I and II genes in Venezuela's population.

    PubMed

    Del Pilar Fortes, María; Gill, Gisselle; Paredes, María Elena; Gamez, Ligia Elena; Palacios, Marina; Blanca, Isaac; Tassinari, Paolo

    2012-01-01

    Population studies represent an integral part and link in understanding the complex chain of host-pathogen interactions, disease pathogenesis, and MHC gene polymorphisms. Genes of Mongoloid, Caucasoid, and Negroid populations have created a distinctive HLA genetic profile in the Venezuelan population. Our objective was to determine the predominant HLA class I and II alleles and haplotype frequencies in the hybrid population of Venezuela. The study population consisted of 486 healthy unrelated native Venezuelans and 180 families. We examined the frequency of HLA A-B-C, HLA-DQ and HLA-DR genes by polymerase chain reaction and subsequent hybridization with sequence-specific oligonucleotide probes. Phenotypic, allelic and haplotype frequencies were estimated by direct counting and using the maximum-likelihood method. The predominant HLA class I alleles were A*02, A*24, A*68, B*35, B*44, B*51, B*07, B*15 and Cw*07. Regarding HLA class II, the most frequent alleles were DQB1*03 and DRB1*04, DRB1*15, DRB1*13, DRB1*07. The prevailing haplotype was HLA-A*02B*35 DQB1*03 DRB1*04. Some of these alleles and haplotype frequencies were predominantly present in Amerindians (A*02, A*24, B*35, Cw*07, DRB1*04, A*24 B*35). Previous reports have shown high incidence of A*02, B*44, B*51, DRB1*15, DRB1*13, DRB1*07 alleles in several European populations and A*68, B*07, B*15 alleles in African Americans, which could have contributed to the ethnic admixture of the Venezuelan population. We conclude that our results provide strong evidence that Venezuela's population represents an admixture of the primitive Mongoloid Aborigines, Caucasoid Europeans and Western African Negroid migrants. PMID:22484528

  18. Integrated foraminiferal biostratigraphy and chemostratigraphy of the querecual formation (Cretaceous), Eastern Venezuela

    USGS Publications Warehouse

    Crespo De Cabrera, S.; Sliter, W.V.; Jarvis, I.

    1999-01-01

    An integrated foraminiferal biostratigraphy and chemostratigraphy is presented for the Lower to Upper Cretaceous Querecual Formation exposed on Chimana Grande Island, Eastern Venezuela. The formation consists of >450 m alternating foraminiferal and organic-rich carbonates and laminated mudrocks, and is considered the main hydrocarbon source rock for the eastern Venezuela Basin. Biostratigraphic resolution within the Querecual Formation is poor, due to a paucity of keeled planktonic foraminifera and impoverished benthic faunas. Deposition occurred in a bathyal environment, with dysaerobic or anoxic bottom waters resulting from high rates of surface productivity associated with an upwelling environment. Biostratigraphic evidence indicates that the Querecual Formation ranges from the upper Albian Rotalipora ticinensis Zone to the Santonian Dicarinella asymetrica Zone. Iron and Al contents fall through the Albian-Cenomanian indicating a progressive decrease in the detrital supply, driven by rising eustatic sea level. A Ca profile demonstrates variations in carbonate production and dissolution. High total organic carbon (TOC) intervals occur in the upper Albian to mid-Cenomanian and Turonian, and high Ba/Al and Si/Al ratios characterize mid-Cenomanian and younger sediments. Variations in these elements primarily reflect changes in marine productivity, but are also affected by diagenetic processes. A stable carbon isotope curve established from analysis of organic matter (??13Corg) correlates well with published ??13C curves for carbonates from England and Italy. The Cenomanian/Turonian boundary cannot be identified using planktonic foraminifera, because key taxa are absent, but the base of the Turonian is clearly indicated by a sharp fall in ??13C immediately above a major positive excursion. The bottom of the Coniacian is placed below a ??13C minimum, towards the base of the Dicarinella concavata Zone. Combined with the foraminiferal data, the isotopic data enable much improved stratigraphic resolution compared to previous investigations of the formation.

  19. Eastern Venezuela Basin's Post-Jurassic evolution as a passive transform margin basin

    SciTech Connect

    George, R.P. Jr. (EGEP Consultores, Caracas (Venezuela)); Sams, R.H. (Sams Exploration Inc., Canyon Lake, TX (United States))

    1993-02-01

    Passive transform margins are segments of rifted continental margins bounded by transform faults that are active during rifting and that become inactive during drifting. Examples include the northern coast of Brazil and its matching margin along the Liberia-Nigeria coast. We propose that the northern margin of the Eastern Venezuela Basin was dominantly a passive transform margin during the Cretaceous and early Paleogene, rather than a purely passive margin. Published microplate reconstructions of the southern Caribbean show Jurassic separation of the Bahamas platform from northern South America along a northwest-trending transform fault postulated to lie just northeast of Trinidad and the Guianas. We conjecture that the [open quotes]Deflexion de Barcelona[close quotes] (a northwest-trending zone of strike slip faults along the southwestern edge of the Serrania del Interior) is controlled by a basement geofracture that is the onshore expression of Jurassic transform fault southwest of and subparallel to the southwestern Bahamas transform. Implications of this conjecture for the Eastern Venezuela Basin include: (1) absence of McKenzie-type regional crustal stretching, Mesozoic thermal anomaly, and Mesozoic thermal-tectonic subsidence; (2) abrupt rather than gradual seaward changes in crustal thickness; (3)abrupt lateral changes in thickness and facies of Mesozoic sediments, as in the Piaui-Ceara basins of northern Brazil; (4) tendency for structural styles developed during Neogene compression to include more strike-slip faults and en enchelon fold sets (because of reactivation of Mesozoic transforms) than would be expected by structural inversion of a purely passive margin.

  20. Effects of Sucrose, Phosphate, and Calcium Carbonate on the Production of Pikromycin from Streptomyces venezuelae.

    PubMed

    Yi, Jeong Sang; Kim, Min-Suk; Kim, Sung-Jin; Kim, Byung-Gee

    2015-04-28

    Polyketide secondary metabolites share common precursor pools, acyl-CoA. Thus, the effects of engineering strategies for heterologous and native secondary metabolite production are often determined by the measurement of pikromycin in Streptomyces venezuelae. It is hard to compare the effectiveness of engineering targets among published data owing to the different pikromycin production media used from one study to the other. To determine the most important nutritional factor and establish optimal culture conditions, medium optimization of pikromycin from Streptomyces venezuelae ATCC 15439 was studied with a statistical method, Plackett-Burman design. Nine variables (glucose, sucrose, peptone, (NH4)2SO4, K2HPO4, KH2PO4, NaCl, MgSO4·7H2O, and CaCO3) were analyzed for their effects on a response, pikromycin. Glucose, K2HPO4, and CaCO3 were determined to be the most significant factors. The path of the steepest ascent and response surface methodology about the three selected components were performed to study interactions among the three factors, and the fine-tune concentrations for maximized product yields. The significant variables and optimal concentrations were 139 g/1 sucrose, 5.29 g/l K2HPO4, and 0.081 g/l CaCO3, with the maximal pikromycin yield of 35.5 mg/l. Increases of the antibiotics production by 1.45-fold, 1.3-fold, and 1.98-fold, compared with unoptimized medium and two other pikromycin production media SCM and SGGP, respectively, were achieved. PMID:25341465

  1. 20. Raw Material for the Geographic Magazine. The mills of ...

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

    20. Raw Material for the Geographic Magazine. The mills of the Champion International Company which make paper on which the National Geographic Magazine is printed are located in Lawrence, Mass. This picture shows great piles of pulp-wood ready for conversion into paper for the The Geographic. Parts of these wood piles are more than 50 feet high. The cars shown in the picture are on a trestle 21 feet high. The Geographic magazines mailed in a single year, if laid side by side, would reach from Quito, Ecuador, across Colombia and Caribbean, thence across the United States and Canada, through the North Pole, and across Siberia, China, and Siam to Bangkok. It takes 33,000 miles of wrappers to mail one year's edition. It would require a bookshelf more than three and a half miles long to hold all the copies of this month's issue of The Geographic. (p.235.) - Champion-International Paper Company, West bank of Spicket River at Canal Street, Lawrence, Essex County, MA

  2. Malarial parasites as geographical markers in migratory birds?

    PubMed Central

    Fallon, Sylvia M; Fleischer, Robert C; Graves, Gary R

    2006-01-01

    We tested the hypothesis that malarial parasites (Plasmodium and Haemoproteus) of black-throated blue warblers (Dendroica caerulescens) provide sufficient geographical signal to track population movements between the warbler's breeding and wintering habitats in North America. Our results from 1083 warblers sampled across the species' breeding range indicate that parasite lineages are geographically widespread and do not provide site-specific information. The wide distribution of malarial parasites probably reflects postnatal dispersal of their hosts as well as mixing of breeding populations on the wintering range. When compared to geographically structured parasites of sedentary Caribbean songbirds, patterns of malarial infections in black-throated blue warblers suggest that host–malaria dynamics of migratory and sedentary bird populations may be subject to contrasting selection pressures. PMID:17148365

  3. Teacher Resources-The Canadian Council for Geographic Education

    NSDL National Science Digital Library

    2012-07-20

    The Canadian Council for Geographic Education (CCGE) is serious about geographic education. This site provides a range of educational materials for those with a passion for the spatial sciences. The materials here are divided into four areas: Canadian Atlas Online, Lesson Plans, Classroom Activities, and Teaching About Geographical Thinking. In the Canadian Atlas Online area, visitors can learn about "the stories that define all Canadians." Visitors to this section can create their own customized maps of Canada and read through a glossary of terms. Moving on, the Lesson Plans area contains over 100 plans that deal with the environment, cultural geography, oceanography, and international development. The Geomatics area is quite a find, as it brings together GIS-based activities to explore topics like Nunavut and crime mapping. Finally, the Classroom Activities area contains some great poster maps of the Mackenzie Delta and the South Gulf Islands.

  4. Venezuela kimberlites

    NASA Astrophysics Data System (ADS)

    Nixon, Peter H.; Davies, Gareth R.; Rex, David C.; Gray, Alan

    1992-04-01

    Recently discovered kimberlitic dykes and sills in the Guaniamo area of Bolivar Province (Guyana Craton) are the source of nearby extensive alluvial diamonds occurring in Recent gravels and in the Roraima sedimentary group (ca. 1.7 Ga) to the south. The intrusives are altered to nontronite and saponite but texturally are identified as Group I macrocrystic olivine rich kimberlites with identifiable monticellite and phlogopite. The REE show steep patterns and high (La/Yb) n up to 480; Cr, Ni and Nb are enriched, but LILE and Ti, Zr depleted with respect to average kimberlite, partly as a result of weathering. Leached samples yield a Rb-Sr isochron age of 1732 ± 82 Ma making them the oldest kimberlites on record. Sr and Nd isotope data are more consistent with a Group II, rather than a Group I kimberlite paragenesis. Discrete nodules (megacrysts) which typify Group I kimberlites have not been identified. There are no mantle xenoliths but mantle xenocrysts of chromium-rich pyropes and spinels, similar to those from cratonic harzburgite xenoliths of diamond facies, are abundant. The spinels show metasomatic alteration to yimengite. The kimberlites are intruded by micaceous dykes enriched in K, Ba, Sr, Zr and F indicative of a second phase of alkaline igneous activity. These igneous and metasomatic events are discussed in the context of the evolution of the Guyana Craton. Archaean metamorphism associated with the Imataca Complex spans the harzburgite chromium pyrope model Nd age (2.6 Ga). The widespread Trans-Amazonian metamorphic event (ca. 2.1 Ga) was possibly contemporaneous with mantle metasomatism indicated by yimengite formation. The kimberlites were emplaced thereafter (1.7 Ga). The micaceous dykes (0.85 Ga, {39}/{40}Ar) were generated in a mantle enriched in elements similar to those found in the earlier formed yimengite (K, Ba, Sr).

  5. Geographic variation of dental utilization among low income children.

    PubMed

    McKernan, Susan C; Kuthy, Raymond A; Hanley, Paul F; Jones, Michael P; Momany, Elizabeth T; McQuistan, Michelle R; Damiano, Peter C

    2015-07-01

    Spatial accessibility of dental care is mediated by dentist workforce availability and travel costs. In this study, we generated dental service areas through small area analysis of Medicaid administrative data and claims. Service areas were then used to assess dimensions of spatial accessibility, including dentist-to-population ratios, and examine relationships in geographic variation of routine dental care among Medicaid-enrolled children. Our findings indicate significant geographic differences in accessibility for Hispanic children compared to other children, even after controlling for individual and service area characteristics. PMID:26026599

  6. Tomato chlorotic leaf distortion virus, a new bipartite begomovirus infecting Solanum lycopersicum and Capsicum chinense in Venezuela

    Microsoft Academic Search

    Karla Zambrano; Francis Geraud-Pouey; Doris Chirinos; Gustavo Romay; Edgloris Marys

    Virus isolate T217L was obtained from a diseased tomato (Solanum lycopersicum) plant showing leaf deformation and chlorotic mottle symptoms near Maracaibo in the state of Zulia, Venezuela. Full-length\\u000a DNA-A and DNA-B molecules of T217L were cloned and sequenced. The genome organization of T217L was identical to the bipartite\\u000a genomes of other begomoviruses described from the Americas. Characteristic disease symptoms were

  7. Planktonic foraminiferal shell weight as a proxy for changing carbonate ion concentration in the Cariaco Basin, Venezuela

    Microsoft Academic Search

    B. J. Marshall; M. C. McConnell; R. Thunell

    2010-01-01

    Ocean acidification, due to increased atmospheric CO2, has diverse implications for marine calcifiers. In this study we use biweekly sediment trap samples and concurrent hydrographic measurements collected between January 2003 and May 2007 in the Cariaco Basin, Venezuela (10°30' N, 65°31 W) to assess the relationship between shell weight and carbonate ion concentration [CO32-] of two planktonic foraminiferal species, Globigerinoides

  8. Biomarker-based paleo-record of environmental change for an eutrophic, tropical freshwater lake, Lake Valencia, Venezuela

    Microsoft Academic Search

    Yunping Xu; Rudolf Jaffé

    2008-01-01

    The lipids in a sediment core from Lake Valencia, a hypereutrophic freshwater lake in Venezuela, are examined to understand\\u000a environmental changes over the last ?13,000 years. From the latest Pleistocene to the earliest Holocene, total organic carbon\\u000a (TOC) substantially increased from 2.2 to 10%, while total organic carbon over total nitrogen (TOC\\/TN) decreased from as high\\u000a as 34 to as low

  9. COMMON TIMBER NATURAL DURABILITY STUDY IN THE BAJO APURE IN VENEZUELA II: Congrio (Swartzia sericea) y salado (Vochysia lehmanii)

    Microsoft Academic Search

    Otón Holmquist; Aurora Cadenas; Pietro Pietrantonio; Andrea Piña; Alfredo Maggiorani; Lilian Bracamonte

    Following the standars of the American Society for Testing and Materials (A.S.T.M.) D: 2017-81, the natural durability of two important timbers from Bajo Apure, Venezuela, Swartzia sericea Vogel, Papilonaceae (Congrio) and Vochysia lehmanii Hieron., Vochysiaceae (Salado) were determined. Besides the two decay fungi specified by the international method Gloeophyllum trabeum and Trametes versicolor, two common wood rotters of the area

  10. Feeding ecology and postural behaviour of the three-toed sloth ( Bradypus variegatus flaccidus) in northern Venezuela

    Microsoft Academic Search

    B. Urbani; C. Bosque

    2007-01-01

    We studied the diet, activity budget, vertical ranging, and postural behaviour in relation to weather of the three-toed sloth (Bradypus variegatus flaccidus) in disturbed montane forest remnants (1150m asl) in northern Venezuela. Sloths spent most (72.9%) of their time resting and had a nearly exclusive (99.4%) leaf diet. While resting they assumed a sitting – not hanging – posture mostly

  11. Molecular epidemiology suggests Venezuela as the origin of the dengue outbreak in Madeira, Portugal in 2012-2013.

    PubMed

    Franco, L; Pagan, I; Serre Del Cor, N; Schunk, M; Neumayr, A; Molero, F; Potente, A; Hatz, C; Wilder-Smith, A; Sánchez-Seco, M P; Tenorio, A

    2015-07-01

    An explosive epidemic occurred in Madeira Island (Portugal) from October 2012 to February 2013. Published data showed that dengue virus type 1 introduced from South America was the incriminated virus. We aim to determine the origin of the strain introduced to Madeira by travellers returning to Europe. Using phylogeographic analysis and complete envelope sequences we have demonstrated that the most probable origin of the strain is Venezuela. PMID:25843502

  12. Genetically engineered biosynthesis of macrolide derivatives including 4-amino-4,6-dideoxy-L-glucose from Streptomyces venezuelae YJ003-OTBP3.

    PubMed

    Pageni, Binod Babu; Oh, Tae-Jin; Liou, Kwangkyoung; Yoon, Yeo Joon; Sohng, Jae Kyung

    2008-01-01

    Two sugar biosynthetic cassette plasmids were used to direct the biosynthesis of a deoxyaminosugar. The pOTBP1 plasmid containing TDP-glucose synthase (desIII), TDP-glucose-4,6-dehydratase (desIV), and glycosyltransferase (desVII/desVIII) was constructed and transformed into S. venezuelae YJ003, a strain in which the entire gene cluster of desosamine biosynthesis is deleted. The expression plasmid pOTBP3 containing 4-aminotransferase (gerB) and 3,5-epimerase (orf9) was transformed again into S. venezuelae YJ003- OTBP1 to obtain S. venezuelae YJ003-OTBP3 for the production of 4-amino-4,6-dideoxy-L-glucose derivatives. The crude extracts obtained from S. venezuelae ATCC 15439, S. venezuelae YJ003, and S. venezuelae YJ003-OTBP3 were further analyzed by TLC, bioassay, HPLC, ESI/MS, LC/MS, and MS/MS. The results of our study clearly shows that S. venezuelae YJ003-OTBP3 constructs other new hybrid macrolide derivatives including 4-amino-4,6-dideoxy-L-glycosylated YC-17 (3, [M+ Na+] m/z=464.5), methymycin (4, m/z=480.5), novamethymycin (6, m/z=496.5), and pikromycin (5, m/z=536.5) from a 12- membered ring aglycon (10-deoxymethynolide, 1) and 14-membered ring aglycon (narbonolide, 2). These results suggest a successful engineering of a deoxysugar pathway to generate novel hybrid macrolide derivatives, including deoxyaminosugar. PMID:18239422

  13. ORIGINAL PAPER Geographic variation in caste ratio of trematode colonies

    E-print Network

    Poulin, Robert

    of colony members, for example, this idea is formulated as the optimal caste ratio theory, which predicts to the division of labour in social insects, castes of morphologically distinct individuals exist within colonies conditions. In the case of colonies from geographically and potentially genetically distinct populations

  14. Recommendation of shopping places based on social and geographical influences

    E-print Network

    Jannach, Dietmar

    Recommendation of shopping places based on social and geographical influences Romain Picot.bothorel@telecom-bretagne.eu ABSTRACT The project tackled in this article is a shopping recommender system that aims at providing recommendations of new interesting shopping places to users, by considering their tastes and those

  15. An investigation of geographic mapping techniques for internet hosts

    Microsoft Academic Search

    Venkata N. Padmanabhan; Lakshminarayanan Subramanian

    2001-01-01

    In this paper, we ask whether it is possible to build an IP address to geographic location mapping service for Internet hosts. Such a service would enable a large and interesting class of location-aware applications. This is a challenging problem because an IP address does not inherently contain an indication of location.We present and evaluate three distinct techniques, collectively referred

  16. Time and Practice: Learning to Become a Geographer

    ERIC Educational Resources Information Center

    Downs, Roger M.

    2014-01-01

    A goal of geography education is fostering geographic literacy for all and building significant expertise for some. How much time and practice do students need to become literate or expert in geography? There is not an answer to this question. Using two concepts from cognitive psychology--the ideas of ten thousand hours and deliberate…

  17. Teaching "with" Rather than "about" Geographic Information Systems

    ERIC Educational Resources Information Center

    Hammond, Thomas C.; Bodzin, Alec M.

    2009-01-01

    Both "teaching" and "teaching" with Geographic Information Systems (GIS) are "wicked problems," in the sense that they involve multiple variables that interact with one another. Effective teaching calls for both learning with understanding and transfer. The authors' own experience implementing a geography and geospatial inquiry project with middle…

  18. Visualization of Geographic Query Results for Small Screen Devices

    E-print Network

    Carmo, Maria Beatriz

    , such as cartography, tourism, natural resources management and emergency management. These devices allow the userVisualization of Geographic Query Results for Small Screen Devices Maria Beatriz Carmo, Ana Paula@lasige.di.fc.ul.pt ABSTRACT The visualization of geo-referenced information on a map has become an essential method to help

  19. Accounting for Geographic Heterogeneity in Recreation Demand Models

    Microsoft Academic Search

    Kavita Sardana; James Michael Bowker; John C. Bergstrom; C. Meghan Starbuck; Donald B. K. English

    2008-01-01

    Spatial differences in site characteristics and user populations may result in heterogeneity of recreation preferences and values across geographic regions. Non-linear mixed effects models provide a potential means of accounting for this heterogeneity. This approach was tested by estimating a national-level recreation demand model with encouraging results.

  20. Determining Geographical Subject Headings for Local History Collections.

    ERIC Educational Resources Information Center

    Bake, Blaine R.

    The effectiveness of current subject cataloging practices for assigning geographical headings to local historical records in meeting the requirements of an escalating number of genealogist-patrons was examined. The findings indicated that catalogers use two general approaches in determining subject headings for local historical collections in the…

  1. YouTube Around the World: Geographic Popularity of Videos

    E-print Network

    Huang, Yan

    YouTube Around the World: Geographic Popularity of Videos Anders Brodersen Google abrodersen@google.com ABSTRACT One of the most popular user activities on the Web is watch- ing videos. Services like YouTube, local region. In this work we study the relationship between popular- ity and locality of online YouTube

  2. Geographers and globalization: the future of regional geography Introduction

    E-print Network

    Wei, Yehua Dennis

    status of regional geography, including the geography of China. I also discuss the roads that geographers, especially those working on China, may take to improve their academic status, which may have important was auditing my Geography 332 China course was quick to embrace Friedman's idea that the world is flattening

  3. Geographic distribution and epidemiology of peste des petits ruminants viruses

    Microsoft Academic Search

    M. S Shaila; David Shamaki; Morag A Forsyth; Adama Diallo; Lynnette Goatley; R. P Kitching; Thomas Barrett

    1996-01-01

    Peste des petits ruminants (PPR) is an important viral disease of goats and sheep prevalent in West Africa and the Middle East. In recent years, PPR has emerged in India, first in the South India and later in North India. To study the genetic relationships between viruses of distinct geographical origin we have sequenced a 322 nucleotide cDNA fragment of

  4. Geographical variation in mutualistic networks: similarity, turnover and partner fidelity.

    PubMed

    Trøjelsgaard, Kristian; Jordano, Pedro; Carstensen, Daniel W; Olesen, Jens M

    2015-03-01

    Although species and their interactions in unison represent biodiversity and all the ecological and evolutionary processes associated with life, biotic interactions have, contrary to species, rarely been integrated into the concepts of spatial ?-diversity. Here, we examine ?-diversity of ecological networks by using pollination networks sampled across the Canary Islands. We show that adjacent and distant communities are more and less similar, respectively, in their composition of plants, pollinators and interactions than expected from random distributions. We further show that replacement of species is the major driver of interaction turnover and that this contribution increases with distance. Finally, we quantify that species-specific partner compositions (here called partner fidelity) deviate from random partner use, but vary as a result of ecological and geographical variables. In particular, breakdown of partner fidelity was facilitated by increasing geographical distance, changing abundances and changing linkage levels, but was not related to the geographical distribution of the species. This highlights the importance of space when comparing communities of interacting species and may stimulate a rethinking of the spatial interpretation of interaction networks. Moreover, geographical interaction dynamics and its causes are important in our efforts to anticipate effects of large-scale changes, such as anthropogenic disturbances. PMID:25632001

  5. Why Should Geographers Lost In The Field Read Roland Barthes?

    E-print Network

    Paris-Sud XI, Université de

    Why Should Geographers Lost In The Field Read Roland Barthes? Yann Calbérac1 University of Lyon criticism of the 1970s ­ and especially on Roland Barthes's famous article summing up his conception of text, fieldwork, text, literary criticism, Roland Barthes In this article, I want to assume that reading Roland

  6. BRIEF REPORT Relationship of Geographic Distance, Depth, Temperature,

    E-print Network

    Winter, Christian

    commu- nity composition. Bacterial communities showed a clear depth zonation, whereas changesBRIEF REPORT Relationship of Geographic Distance, Depth, Temperature, and Viruses with Prokaryotic­25 m depth), in the deep chlorophyll maximum layer (DCM; 50 m depth), and deep waters (75­1000 m depth

  7. GEOGRAPHICAL VARIATION IN THE NESTLING COLORATION OF PARASITIC COWBIRDS

    Microsoft Academic Search

    STEPHEN I. ROTHSTEIN

    ABSTCT.--Cowbird nestlings show significant geographical variation in rictal flange color.' Twenty-four cowbirds from the Southwest, where the race Molothrus ater obscurus breeds, had yellow flanges whereas 73 from the remainder of the United States and Canada, where the races artemisiae and ater breed, had white flanges. There is little or no intralocality variation. Nestling cowbirds with yellow and white flanges

  8. Assessing the Impact of Geographically Correlated Network Failures

    E-print Network

    Modiano, Eytan

    of the infrastructure affects the impact of these events. For example, since an EMP attack can affect electronic, and even an EMP attack; as these may affect the electronic amplifiers that are needed to operate the fiber, such as an electromagnetic pulse (EMP) attack. Such real-world events have geographical locations, and therefore

  9. Towards a Regionally Balanced Geographic Education beyond Geography Class

    ERIC Educational Resources Information Center

    Dittmer, Jason

    2005-01-01

    This contribution to the "Comments" section first introduces a metric designed to estimate the amount of attention given to different countries of the world in academia using Internet "term paper mills". This metric is used to introduce a call for the incorporation of more geographic education regarding peripheral areas of the world into the…

  10. Research assessment and the production of geographical knowledge

    Microsoft Academic Search

    Noel Castree; Richard Aspinall; Lawrence D. Berg; Hans-Georg Bohle; Rob Kitchin; Dorothea Kleine; Elmar Kulke; Richard Munton; Eric Pawson; Joe Powell; Eric Sheppard; Jan van Weesep

    2006-01-01

    This Forum examines the research assessment systems (RASs) that affect professional human geography, and offers perspectives on the whole idea of formal research assessment. The Forum aims to assist professional geographers in their reflections on present and future research assessment in their own countries. It comprises two parts. The first offers highly succinct and detailed descriptions of the RASs currently

  11. Geographic Information Systems and Health: An Educational Resource.

    ERIC Educational Resources Information Center

    Albert, Don P.; And Others

    1995-01-01

    Maintains that the use of geographic information systems (GIS) to analyze spatial dimensions of health care and disease ecology is becoming a realistic prospect for investigators in the social sciences. Contends that enough information is available to provide instructors with materials for classroom units. (CFR)

  12. STATE SOIL GEOGRAPHIC (STATSGO) DATA BASE FOR THECOTERNIMOUS UNITED STATES

    EPA Science Inventory

    USSOILS is an Arc 7.0 coverage containing hydrology-relevant information for 10,498 map units covering the entire conterminous United States. The coverage was compiled from individual State coverages contained in the October 1994 State Soil Geographic (STATSGO) Data Base produce...

  13. Responsive, scalable thinwire visualization: application to large geographic datasets #

    E-print Network

    Yap, Chee

    Responsive, scalable thinwire visualization: application to large geographic datasets # Chee Yap issues of current visualization research relate to the largeness of datasets to be visualized. The normal mode for visualizing such data involves the rendering of views that are both partial and dynamic. A key

  14. Geographic Variations in Elementary School-Based Physical Activity Practices

    ERIC Educational Resources Information Center

    Turner, Lindsey; Chaloupka, Frank J.; Slater, Sandy J.

    2012-01-01

    Background: Physical activity (PA) is associated with health and academic benefits among children, but many schools do not meet national recommendations. This study examined school-based PA practices in nationally representative samples of public elementary schools, and geographic variations in those practices. Methods: Mail-back surveys were used…

  15. Geographic Range Expansion for Rat Lungworm in North America

    PubMed Central

    Creecy, James P.; Lord, Wayne D.; Caire, William

    2015-01-01

    Using quantitative PCR analysis and DNA sequencing, we provide evidence for the presence of rat lungworm (Angiostrongylus cantonensis) in Oklahoma, USA, and identified a potentially novel rat host (Sigmodon hispidus). Our results indicate a geographic range expansion for this medically and ecologically relevant parasite in North America. PMID:26079818

  16. Genomic signatures reveal geographic adaption and human selection in cattle

    Technology Transfer Automated Retrieval System (TEKTRAN)

    We investigated geographic adaptation and human selection using high-density SNP data of five diverse cattle breeds. Based on allele frequency differences, we detected hundreds of candidate regions under positive selection across Holstein, Angus, Charolais, Brahman, and N'Dama. In addition to well-k...

  17. Multimodal Geographic Information Systems: Adding Haptic and Auditory Display.

    ERIC Educational Resources Information Center

    Jeong, Wooseob; Gluck, Myke

    2003-01-01

    Investigated the feasibility of adding haptic and auditory displays to traditional visual geographic information systems (GISs). Explored differences in user performance, including task completion time and accuracy, and user satisfaction with a multimodal GIS which was implemented with a haptic display, auditory display, and combined display.…

  18. Geographic Dissection of the Twitter Network Juhi Kulshrestha Farshad Kooti

    E-print Network

    Gummadi, Krishna P.

    Geographic Dissection of the Twitter Network Juhi Kulshrestha Farshad Kooti Max Planck Institute interactions occur online via social net- working sites like Twitter and Facebook, users can in- teract in online social networks? In this paper, we attempt to address this question by dissecting the Twitter so

  19. Using Student Interviews for becoming a Reflective Geographer

    ERIC Educational Resources Information Center

    Adriansen, Hanne Kirstine; Madsen, Lene Møller

    2014-01-01

    This paper presents a case for interviewing students as an effective yet complex way to integrate reflexive practice into teaching and research. Even though many human geographers are accustomed to conducting qualitative interviews in various contexts, it is not straightforward to interview one's own students. This paper addresses three…

  20. Geographic variation in the yellow-billed cuckoo

    USGS Publications Warehouse

    Banks, R.C.

    1988-01-01

    Populations of the Yellow-billed Cuckoo, Coocyzus americanus, west of the Rocky Mountains have average wing lengths slightly greater than those of eastern North America, but the difference is not sufficient for taxonomic recognition. There is no geographically oriented variation in bill size or color, and the species is best considered monotypic.