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1

EVALUACIÓN MICROBIOLÓGICA DE PESCADOS CONGELADOS PRODUCIDOS EN CUMANÁ, ESTADO SUCRE, VENEZUELA Microbiological Evaluation of Frozen Fish Produced in Cumana, Sucre State, Venezuela  

Microsoft Academic Search

The purpose of this research was to evaluate the frequency of bacteria and fungi, in samples of slices of congealed mountain range (Scomberomorus spp) and merluza (Merluccius spp.), produced in Cumaná, Sucre state, Venezuela. 60 samples, 30 from mountain range (Scomberomorus spp) and 30 from mer- luza (Merluccius spp.), sold in three supermarkets were col- lected forming units colony per

Sara Centeno; Rossianny Rodríguez

2005-01-01

2

Especiación de metales pesados en la fracción disuelta de las aguas superficiales de la cuenca baja y la pluma del Río Manzanares, Estado Sucre, Venezuela Heavy metal speciation in the surface water dissolved fraction of the low watershed and plume of the Manzanares River, Sucre State, Venezuela  

Microsoft Academic Search

This paper reports on the speciation of heavy metals (Cd, Pb, Cr, Cu, Ni, Mn, Fe, and Zn) in the surface water dissolved fraction of the low basin and plume of the Manzanares River, in the state of Sucre, Venezuela, based on data taken at 22 stations from July 1996 to June 1997. The total metal concentrations in the dissolved

G Martínez; W Senior; A Márquez; Estado Sucre

2006-01-01

3

[Protozoans in superficial waters and faecal samples of individuals of rural populations of the Montes municipality, Sucre state, Venezuela].  

PubMed

In Sucre state, the Manzanares river is threatened by domestic, agricultural and industrial activities, becoming an environmental risk factor for its inhabitants. In this sense, the presence of protozoans in superficial waters of tributaries of the Manzanares river (Orinoco river, Quebrada Seca, San Juan river), Montes municipality, Sucre state, as well as the analysis of faecal samples from inhabitants of towns bordering these tributaries were evaluated. We collected faecal and water samples from may 2006 through april 2007. The superficial water samples were processed after centrifugation by the direct examination and floculation, using lugol, modified Kinyoun and trichromic colorations. Fecal samples where analyzed by direct examination with physiological saline solution and the modified Ritchie concentration method and using the other colorations techniques above mentioned. The most frequently observed protozoans in superficial waters in the three tributaries were: Amoebas, Blastocystis sp, Endolimax sp., Chilomastix sp. and Giardia sp. Whereas in faecal samples, Blastocystis hominis, Endolimax nana and Entaomeba coli had the greatest frequencies in the three communities. The inhabitants of Orinoco La Peña turned out to be most susceptible to these parasitic infections (77.60%), followed by San Juan River (46.63%) and Quebrada Seca (39.49%). The presence of pathogenic and nonpathogenic protozoans in superficial waters demonstrates the faecal contamination of the tributaries, representing a constant focus of infection for their inhabitants, inferred by the observation of the same species in both types of samples. PMID:21365874

Mora, Leonor; Martínez, Indira; Figuera, Lourdes; Segura, Merlyn; Del Valle, Guilarte

2010-12-01

4

Analysis of the El Nin?o/La Nin?a-Southern Oscillation variability and malaria in the Estado Sucre, Venezuela.  

PubMed

The last decade has seen an unprecedented, worldwide acceleration of environmental and climate changes. These processes impact the dynamics of natural systems, which include components associated with human communities such as vector-borne diseases. The dynamics of environmental and climate variables, altered by global change as reported by the Intergovernmental Panel on Climate Change, affect the distribution of many tropical diseases. Complex systems, e.g. the El Nin?o/La Nin?a-Southern Oscillation (ENSO), in which environmental variables operate synergistically, can provoke the reemergence and emergence of vector-borne diseases at new sites. This research investigated the influence of ENSO events on malaria incidence by determining the relationship between climate variations, expressed as warm, cold and neutral phases, and their relation to the number of malaria cases in some north-eastern municipalities of Venezuela (Estado Sucre) during the period 1990-2000. Significant differences in malaria incidence were found, particularly in the La Nin?a ENSO phases (cold) of moderate intensity. These findings should be taken into account for surveillance and control in the future as they shed light on important indicators that can lead to reduced vulnerability to malaria. PMID:23032283

Delgado-Petrocelli, Laura; Córdova, Karenia; Camardiel, Alberto; Aguilar, Víctor H; Hernández, Denise; Ramos, Santiago

2012-09-01

5

Huntington disease mutation in Venezuela: age of onset, haplotype analyses and geographic aggregation  

Microsoft Academic Search

The aggregation of patients with Huntington's disease (HD) around Lake Maracaibo, Zulia State, Venezuela, is widely recognized,\\u000a but the epidemiology of HD in the whole country is relatively unstudied. We have examined 279 individuals from 60 unrelated\\u000a affected families residing in various areas of Venezuela for the presence of CAG repeats and other features associated with\\u000a HD. The number of

Irene Paradisi; Alba Hernández; Sergio Arias

2008-01-01

6

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

Microsoft Academic Search

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

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

7

Jose Antonio Ramos Sucre y la modernidad poetica  

E-print Network

JOSE ANTONIO RAMOS SUCRE Y LA MODERNIDAD POETICA Tesis por WILLIAM SHELL WATSON Presentado a la Of icina de Estudios Graduados de Texas A&M University en cumplimiento parcial de los requisitos para obtener el grado de MAESTRIA EN ARTES... esteticas descritas en los manifiestos de Andre Bret6n y enumerados por criticos posteriores. La poesia de Ramos Sucre responde a la 6poca moderna con una expresi6n que todavia cuestiona el valor de las interpretaciones tradicionales de la realidad...

Watson, William Shell

2012-06-07

8

A comparative analysis of the clotting and fibrinolytic activities of the snake venom (Bothrops atrox) from different geographical areas in Venezuela.  

PubMed

Venom constitution within the same snake species can present considerable geographical variations. Bothrops atrox venoms were obtained from adult snakes captured at different geographical locations: Parguasa (Bolívar state); Puerto Ayacucho 1, Serranía del Cuao and Puerto Ayacucho 2 (Amazon state). The coagulant and fibrinolytic activities of these venoms were compared. Amidolytic activity of crude snake venom was measured by a micromethod designed in our laboratory. Coagulant activity on plasma and fibrinogen due to thrombin-like activity in venoms was also determined. Crude snake venom fibrinolytic activity by the fibrin plate method was assayed. Chromatographic studies were developed on Protein-Pack 300 column. Polyacrylamide gel electrophoresis was carried out under reduced conditions. After SDS-PAGE of samples, the fibrin-zymography was tested on agarose-fibrin plates. The results demonstrated several differences among B. atrox venoms from different geographical areas. Chromatograms and SDS-PAGE profiles indicated that venoms from the same species presented differences in the molecular mass of their components. The procoagulant activity depended on the utilized method (amidolytic versus clotting). Parguasa and Puerto Ayacucho 2 venoms presented procoagulant activity for both methods. Furthermore, Parguasa venom had also the highest hemorrhagic activity and the lowest LD50. In relation to the fibrinolytic activity, Puerto Ayacucho 1 venom was the most active, equally for fibrin plates as for the amidolytic method (t-PA like). This venom had the lowest coagulant activity, which induced us to think that probably its procoagulant activity was interfered by its fibrinolytic activity. PMID:17045631

Salazar, Ana Maria; Rodriguez-Acosta, Alexis; Girón, Maria E; Aguilar, Irma; Guerrero, Belsy

2007-01-01

9

[Heavy metal distribution in superficial sedimenta ta Saco, Gulf of Cariaco, Sucre, Venezuela].  

PubMed

The Gulf of Cariaco is a marine ecosystem with high primary productivity, which gives it an ecological and socioeconomic importance. Nevertheless, anthropogenic activities around the Gulf produce wastes that are deposited directly or by runoff into the sediments, and consequently, increases concentrations of metals in this ecosystem. The objective of this study was to determine the distribution of cadmium, copper, lead, manganese, nickel and zinc in geochemical fractions of surface sediments, using modified BCR sequential extraction procedure. The concentrations were measured using flame atomic absorption spectroscopy. In addition, the contents of soluble and exchangeable metals associated to carbonate fractions, determined by BCR, were compared with those determined by the method of Campanella. Samples were collected in 12 stations during June 2007. The applied methodologies were evaluated with a certified reference material of marine sediments (HISS-1) and the results indicated that these methods provide adequate accuracy and precision for the extraction of metals. The total metal concentrations (microg g(-1)) were, Cd: < limit of detection (LD)-5.0; Pb: 1.79-60.41; Cu: no detected (ND)-42.18; Zn: 25.13-104.57; Mn: 66.31-80.29 and Ni: 3.29-24.58. Cd, Cu, Ni and Pb at several stations, exceeded the Canadian Sediment Quality Guidelines of the Lowest Effect Levels (LEL). Cadmium was identified as being the most mobile of the elements, having the highest concentrations in soluble and exchangeable cations and carbonates. However, Pb, Cu, Mn and Zn levels were found highly associated to organic matter and sulfide fractions. The methods did not show significant statistical differences for the extraction of soluble and exchangeable cations and the metals associated to carbonate fraction. There are several significant correlations between heavy metals, which suggest their common origin. PMID:21302528

Valentina Fuentes, María; Rojas de Astudillo, Luisa; Diaz, Alfredo; Martínez, Gregorio

2010-10-01

10

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

PubMed

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

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

2004-06-01

11

Venezuela: Lake Maracaibo  

article title:  Oil Slicks on Lake Maracaibo, Venezuela     View Larger Image Several oil slicks occurred on Lake Maracaibo in northwestern Venezuela between ... wave facets divert reflected rays into many directions. An oil film dampens the presence of small wind-driven "capillary" waves, resulting ...

2013-04-18

12

[Secondary metabolites, lethality and antimicrobial activity of extracts from three corals and three marine mollusks from Sucre, Venezuela].  

PubMed

The study of biochemical activity of extracts obtained from marine organisms is gaining interest as some have proved to have efficient health or industrial applications. To evaluate lethality and antimicrobial activities, some chemical tests were performed on crude extracts of the octocorals Eunicea sp., Muricea sp. and Pseudopterogorgia acerosa and the mollusks Pteria colymbus, Phyllonotus pomum and Chicoreus brevifrons, collected in Venezuelan waters. The presence of secondary metabolites like alkaloids, unsaturated sterols and pentacyclic triterpenes in all invertebrates, was evidenced. Additionally, sesquiterpenlactones, saponins, tannins, cyanogenic and cardiotonic glycosides were also detected in some octocoral extracts, suggesting that biosynthesis of these metabolites is typical in this group. From the lethality bioassays, all extracts resulted lethal to Artemia salina (LC50<1000 microg/ml) with an increased of lethal activity with exposition time. P. pomum extract showed the highest lethality rate (LC50=46.8 microg/ml). Compared to the octocorals, mollusks extracts displayed more activity and a greater action spectrum against different bacterial strains, whereas octocorals also inhibited some fungi strains growth. Staphylococcus aureus was the most susceptible to the antimicrobial power of the extracts (66.7%), whereas Pseudomonas aeruginosa, Candida albicans and Aspergillus niger were not affected. The antibiosis shown by marine organisms extracts indicates that some of their biosynthesized metabolites are physiologically active, and may have possible cytotoxic potential or as a source of antibiotic components. PMID:20527468

Ordaz, Gabriel; D'Armas, Haydelba; Yáñez, Dayanis; Hernández, Juan; Camacho, Angel

2010-06-01

13

Geographical DNA  

NASA Astrophysics Data System (ADS)

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.

Wojtanowicz, Pawe?

2012-01-01

14

Geographic Names  

USGS Publications Warehouse

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.

Yost, Lou; Carswell, William J.

2009-01-01

15

Geographical Theories.  

ERIC Educational Resources Information Center

Discusses the origin of theories in geography and particularly the development of location theories. Considers the influence of economic theory on agricultural land use, industrial location, and geographic location theories. Explores a set of interrelated activities that show how the marketing process illustrates process theory. (MJP)

Golledge, Reginald G.

1996-01-01

16

Venezuela takes responsabilidad  

SciTech Connect

No federal government officials showed up at the Oct. 29 ceremony to lauch the Responsabilidad Integral program of Asoquim, the Venezuelan chemical industry association. But that did not discourage industry representatives. Industry has tried to keep the Ministry of Environment Affairs involved as much as possible, says Danay Zoppi de Perez, corporate v.p. with Grupo Quimico. But industry was proud to be doing it anyway, despite the absence of government. It's a private, proactive initiative. Asoquim's program is based on the six Responsible Care codes. At the ceremony, 56 companies from Asoquim's membership of 150, which represents 90% of chemicals production in the country, signed on. Signatories include stateowned Petroquimica de Venezuela (Pequiven), domestic private-sector firms, and most of the multinationls operating in Venezuela. The ceremony drew officials from the fire service and civil defense authorities who have to deal with spills and accidents.

Hunter, D.

1992-12-09

17

Astronomy in Venezuela  

NASA Astrophysics Data System (ADS)

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.

Rosenzweig, Patricia

18

[Demographic profile of Venezuela].  

PubMed

Sources of demographic data for Venezuela include 11 population censuses conducted between 1873-1981, birth and death registration statistics, and the household sample survey. The average annual rate of population growth increase from 2.8% between 1920-40 to 3-4% thereafter. The population at the 1961 census was 7.52 million. According to preliminary data from the 1981 census, the population of 14.57 million is growing at an annual rate of 2.8%. 41.2% of the population is under 15 years old, implying a huge demand for educational and health services, housing and employment. The dependency rate in 1980 was 81.3% for the country as a whole, 100.4% in rural areas, and 76.0% in urban areas. The young age structure means that the population will continue to grow even if natality rates decline. The crude natality rate was estimated at 47.3/1000 for 1950-55, 36.0 for 1970-75, and 32.9 for 1980-85. Some rural areas still have natality rates of over 47/1000. The total fertility rate declined from 6.5 in 1950-55 to 4.1 in 1980-85. The decline in the natality rate reflects improving quality of life, availability of family planning services, urbanization, and access of women to productive activities and educational centers. The mortality rate was 12.3/1000 in 1950-55, 9.1 in 1960-65, in 1970-75, and has been estimated at 5.5 for 1980-85. Some rural areas have mortality rates of 8.1. The infant mortality rate was 50.2/1000 in 1971 and 34.3 in 1980. Life expectancy at birth is about 69 years. During the 1920s, Venezuela unerwent expansion in infrastructure and technological utilization, generating rapid urbanization. 39.2% of the population was urban in 1941, compared to 78.8% in 1980. The significance of urbanization in Venezuela is due to the rapidity as well as the diffusion of the process. The household sample survey for the 2nd half of 1980 indicated a total of 8.16 million employed and an activity rate of 32.1% overall, 46.4% for males and 17.7% for females. The demographic situation of Venezuela does not appear alarming if viewed in isolation, but the deficit of some 500,000 housing units, the million unemployed, the importation of about 75% of the country's food, the stagnation of agriculture, the lower than subsistence level of about 40% of incomes, and the lack of population policies suggest that the 24.7 million inhabitants projected for 2000 will pose a considerable challenge to the nation. PMID:12266336

Quintero, I

1984-04-01

19

ALBA: A Political Tool for Venezuela’s Foreign Policy  

Microsoft Academic Search

Despite its founding by Hugo Chávez on the heels of the failed Free Trade Area for the Americas (FTAA) negotiations which took place November 2003, the Bolivarian Alliance for the Americas (ALBA, as it is known for its Spanish acronym) has evolved into a political tool that uses “social power” to facilitate Venezuela?s positioning as the leader of the anti-U.S.

Erich de la Fuente

2011-01-01

20

Thinking Like a Geographer  

ERIC Educational Resources Information Center

This article presents an activity that engages the student in the geographic inquiry process, the student acquires geographic data and analyzes geographic information to answer a geographic question. The question is: "Do students in my class have place name mastery of the 50 states?" The activity assesses students' geo-literacy and shows the…

Chernosky, Margaret Shaw

2012-01-01

21

Venezuela. America = Las Americas [Series].  

ERIC Educational Resources Information Center

This bilingual English/Spanish social studies resource booklet provides an encyclopedia-style overview of Venezuela's history, geography, economy, and culture for teachers to use with migrant children in the elementary grades. Topics presented in the English portion include climate, land, people, customs, government, arts, food, culture, wildlife,…

Toro, Leonor; Avery, Robert S.

22

Hydrocarbon potential of Central Monagas, Eastern Venezuela Basin, Venezuela  

SciTech Connect

The Central Monagas area is part of the foreland sub-basin located on the southern flank of the Eastern Venezuela Basin. The sedimentary column of the Central Monagas is at least 7500 in thick and consists of Mesozoic (Cretaceous) and Cenozoic rocks. Interpretations of 60 regional seismic sections have been integrated with data from 12 existing wells, which cover an area of 1200 km{sup 2}. From these interpretations, basin-wide structure and interval isopach maps were constructed in order to aid the depiction of the basin architecture and tectonic history. The sub-basin developed on the southern flank of the Eastern Venezuela Basin is tightly linked to its evolution from a Mesozoic extensional regime into a Cenozoic compressional and strike-slip stage. The basin formed in the Middle Mesozoic by crustal extension of a rifting process. Regional northward tilting of the slab continued during the Late Cretaceous. Finally, the transpression of the Caribbean Plate during the Oligocene-Neogene induced the overprint of compressional deformation associated with the deposition of a foredeep wedge. Geochemical source rock analysis gave an average of 1.2 TOC, and R{sub o} of 0.66 indicating a mature, marine source. The modeling of the hydrocarbon generative history of the basin indicates that the oil migration started in the Middle Miocene, after the trap was formed. Analysis and mapping of reservoir rocks and seal rocks defined the effective area limits of these critical factors. The main play in the area is the extension of the Lower Oficina Formation which is the proven petroleum target in the Eastern Venezuela Basin.

Barrios, F.; Daza, J.; Iusco, G. [Departamento de Geologia, Lagoven, S.A., Caracas (Venezuela)

1996-08-01

23

Triatoma maculata, the Vector of Trypanosoma cruzi, in Venezuela. Phenotypic and Genotypic Variability as Potential Indicator of Vector Displacement into the Domestic Habitat  

PubMed Central

Triatoma maculata is a wild vector of Trypanosoma cruzi, the causative agent of Chagas disease; its incursion in the domestic habitat is scant. In order to establish the possible domestic habitat of T. maculata, we evaluated wing variability and polymorphism of genotypic markers in subpopulations of T. maculata that live in different habitats in Venezuela. As markers, we used the mtCyt b gene, previously apply to evaluate population genetic structure in triatomine species, and the ?-tubulin gene region, a marker employed to study genetic variability in Leishmania subgenera. Adults of T. maculata were captured in the period 2012–2013 at domestic, peridomestic (PD), and wild areas of towns in the Venezuelan states of Anzoátegui, Bolívar, Portuguesa, Monagas, Nueva Esparta, and Sucre. The phenotypic analysis was conducted through the determination of the isometric size and conformation of the left wing of each insect (492 individuals), using the MorphoJ program. Results reveal that insects of the domestic habitat showed significant reductions in wing size and variations in anatomical characteristics associated with flying, in relation to the PD and wild habitats. The largest variability was found in Anzoátegui and Monagas. The genotypic variability was assessed by in silico sequence comparison of the molecular markers and PCR-RFLP assays, demonstrating a marked polymorphism for the markers in insects of the domestic habitat in comparison with the other habitats. The highest polymorphism was found for the ?-tubulin marker with enzymes BamHI and KpnI. Additionally, the infection rate by T. cruzi was higher in Monagas and Sucre (26.8 and 37.0%, respectively), while in domestic habitats the infestation rate was highest in Anzoátegui (22.3%). Results suggest domestic habitat colonization by T. maculata that in epidemiological terms, coupled with the presence in this habitat of nymphs of the vector, represents a high risk of transmission of Chagas disease. PMID:25325053

García-Alzate, Roberto; Lozano-Arias, Daisy; Reyes-Lugo, Rafael Matías; Morocoima, Antonio; Herrera, Leidi; Mendoza-León, Alexis

2014-01-01

24

Paleoseismology in Venezuela: Objectives, methods, applications, limitations and perspectives  

NASA Astrophysics Data System (ADS)

The privileged location of Venezuela along an active interplate deformation belt, despite of being a "so-called" developing country, has led to a long paleoseismic tradition as attested by 45 trench assessments since 1968. Since then, a first 2-trench study was carried out by the American Woodward-Clyde company across the Oca fault at Sinamaica. Since 1980, all further paleoseismic studies have been performed by FUNVISIS and the Uribante-Caparo hydroelectric project (southern Mérida Andes) became their first assessment where 22 huge trenches were bulldozer-dug. Except for these Compañía Anónima de Administración y Fomento Eléctrico (CADAFE) financed trenches and two others, all other assessments were for Petróleos de Venezuela S. A. —PDVSA-. In this paper, geographic and geologic factors, as well as logistic limitations, conditioning success in paleoseismic studies by trenching, shall be discussed based on the Venezuelan experience developed over the years. The scientific contribution of this approach refer to: confirmation of Holocene fault activity, slip-per-event and average slip rate of a given fault (or segment), seismic potential (repeat of maximum credible earthquakes) of known faults, fault segmentation, fault interaction as consequence of stress loading by stick-slip on contiguous faults, time-space distribution of seismic activity along a given tectonic feature, seismotectonic association of historical earthquakes and landscape evolution on the short term and its implications on the long-term evolution (poorly discussed since this is really part of the field of Neotectonics). In recent years (since 1999), a new approach has been introduced in Venezuela consisting in complementing the seismic history derived from trenching studies with the evaluation of seismically induced perturbations in the continuous Quaternary sedimentary record of (either active or fossil) lakes. The future of this discipline in Venezuela heads to more trenching and lake coring in order to gather more data on the previously mentioned aspects. Other paleoseismic approaches have been developed very little in Venezuela since either climate or the geodynamic setting do not favor their application.

Audemard M., Franck A.

2005-10-01

25

Environmental geographic information system.  

SciTech Connect

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.

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

2010-08-01

26

An Energy Overview of Venezuela  

SciTech Connect

The DOE Office of Fossil Energy is maintaining a web site that is meant to provide useful business- and energy-related information about countries and regions of the world for exporters, project developers, and researchers. The site consists of more than 130 country pages (organized into seven different world regions), with each country page having its own set of links to information sources about that country. There are also more than 30 Country Energy Overviews at the web site -- each of these is a comprehensive review of a specific country's entire energy situation, including sections on Energy Policy, Oil, Natural Gas, Coal, Hydroelectric/Renewables, Nuclear Power, Energy Transmission Infrastructure, Electricity, Electric Industry Overview, Environmental Activities, Privatization, Trade, and Economic Situation. The specific country highlighted in this Country Energy Overview is Venezuela. The site is designed to be dynamic. Updates to the overviews will be made as need and resources permit.

anon.

2003-10-20

27

Minnesota Geographic Data Clearinghouse  

NSDL National Science Digital Library

This site from the Minnesota Land Management Information Center provides a collection of sources for geospatial data needed to power Geographic Information Systems. Topics include data search tools, agency data sites, data documentation sites, and aerial photography, among others.

Center, Land M.; Minnesota, State O.

28

Geographic Names Information System  

USGS Publications Warehouse

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.

U.S. Geological Survey

1984-01-01

29

Resources for Geographers  

NSDL National Science Digital Library

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.

Christian, Lance.; Foote, Kenneth E., 1955-

30

Heavy Water. A Production Alternative for Venezuela.  

National Technical Information Service (NTIS)

A survey of heavy water production methods is made. Main facts about isotopic and distillation methods, reforming and coupling to a Hydrogen distillation plant are presented. A feasibility study on heavy water production in Venezuela is suggested. (Atomin...

1985-01-01

31

History of Aeronautical Medicine in Venezuela.  

National Technical Information Service (NTIS)

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 an...

D. R. Iriarte

1986-01-01

32

National Geographic Education Guide  

NSDL National Science Digital Library

From this site teachers can access a variety of tools for teaching geography, access the national geography standards, take their students on over 100 online adventures, acquire lesson plans, view and print out maps, and learn how to network with other teachers interested in geographic education through such groups as the Society's geography alliances. The "Xpeditions" link proves very helpful in finding many of the aforementioned materials. The National Geographic Bee is highlighted along with the Society's GeoBee quiz game. The "Map Machine" is especially good for accessing a variety of printable maps including political, physical, historical, ecoregion, street, and theme maps. The Society's many magazines are hyperlinked to their own separate web pages. In addition, teachers can access an online National Geographic store especially oriented toward teachers interested in acquiring tangible classroom materials.

2002-01-01

33

Geographic Information Systems  

PubMed Central

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

Wieczorek, William F.; Delmerico, Alan M.

2009-01-01

34

Unequal Geographic Unequal Geographic Expectancy in Seoul.  

PubMed

This study examined life expectancies in 25 gus, administrative districts of Seoul, the capital of Korea, by gender in 1995, 2002, and 2008 to explore trends in mortality inequality among areas. The authors constructed single-decrement life tables and employed between-group variance, the Theil index, and mean log deviation to measure absolute and relative disparities in life expectancy among areas during the periods 1995-2002 and 2002-2008. It was found that life expectancy gaps between gus have widened in absolute and relative terms in both genders over the decade, and that this pattern was particularly dramatic in females after 2002. This increasing gap could be attributable to the more negative health impact on females since the late 1990s stemming from the economic crisis, eventually reflected in their places of residence. Thus, a social buffer system to narrow the health gap between geographic areas and social classes must be established. PMID:22535557

Kim, Sangmi; Yi, Seonju; Kim, Meekyung; Kim, Bokyung; Lee, Hwayoung; Jeon, Taekryeon; Cho, Youngtae

2012-05-01

35

Federal Geographic Data Committee  

NSDL National Science Digital Library

The Federal Geographic Data Committee (FGDC) is an interagency committee organized in 1990 to promote the coordinated dissemination and application of geospatial data through development of the National Spatial Data Infrastructure (NSDI). In cooperation with governmental, academic, nonprofit and private sector organizations, the FGDC is developing the NSDI as a base structure of policies, standards, procedures and relationships among data producers and users that will leverage individual geographic data efforts, and thereby facilitate expedited and expanded sharing, access, and use of geospatial data. The NSDI will (1) reduce duplication of effort among agencies, (2) improve quality and reduce costs related to geographic information, (3) make geographic data more available to the public, (4) increase the benefits of using available data, and (4) establish key partnerships with states, counties, cities, tribal nations, academia and the private sector to increase data availability. The Geospatial Data Clearinghouse (i.e., the National Spatial Data Clearinghouse) is a collection of over 250 servers having digital geographic data primarily for use in Geographic Information Systems (GIS), image processing systems, and other modeling software and prepared in accordance with NSDI protocols. While facilitated by the FGDC, the Clearinghouse is cooperative and decentralized, having six regional gateways. From the FGDC site, one can search the Clearinghouse gateways, browse the organizational sites of the registered NSDI Clearinghouse Nodes, download papers pertaining to the metadata, standards, framework, and stakeholders associated with development of the NSDI, or search through the partner site of the Center for Advanced Spatial Technologies (CAST) for online geospatial data by general subject, state GIS and base map sources, or other U.S. organizational sites hosting national scale data.

2008-04-02

36

Download Geographic Data  

Cancer.gov

The section includes Microsoft Excel (.xls) or comma-delimited text (.txt) files that provide county, state economic area (SEA), and state codes and names. There are individual files for each of the three geographic region types, as well as one file relating the three to each other.

37

Geographic Education in Louisiana  

ERIC Educational Resources Information Center

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…

Lewis, Anthony J.

2004-01-01

38

Male sex pheromones and the phylogeographic structure of the Lutzomyia longipalpis species complex (Diptera: Psychodidae) from Brazil and Venezuela.  

PubMed

Lutzomyia longipalpis, a sibling complex, is the main vector of Leishmania chagasi/infantum. Discriminating between siblings is important as they may differ in vectorial capacity. Lutzomyia longipalpis populations display distinct male sex pheromone chemotypes. We investigated the phylogeographic pattern of variation at microsatellite loci from 11 populations from Brazil and Venezuela related to their male pheromone. Temporal genetic differentiation was mostly not significant at the same site. Spatial genetic differentiation was, however, strong, although there was only a weak relationship between genetic differentiation and the geographic distance separating the samples (r2 < 0.10); geographic separation explained a much greater (54-97%) percentage of the genetic differences among populations when samples with the same pheromone type were analyzed separately. A cluster analysis showed five groups: Lu. cruzi (Brazil) and Lu. pseudolongipalpis (Venezuela) as separate species, two (mostly 9-methyl-germacrene-B) Venezuelan and Brazilian groups, and a very distinct cluster of Brazilian cembrene populations. PMID:16222018

Watts, Phillip C; Hamilton, J Gordon C; Ward, Richard D; Noyes, Harry A; Souza, Nataly A; Kemp, Stephen J; Feliciangeli, M Dora; Brazil, Reginaldo; Maingon, Rhayza D C

2005-10-01

39

National Geographic: Coffee  

NSDL National Science Digital Library

This artful National Geographic website serves up a virtual cup of coffee legends and information. The website is better suited for coffee novices than experts, as it provides mostly introductory information about this widely loved beverage. Site features include brief descriptions of significant moments in coffee history (beginning in Ethiopia around A.D. 800), an overview of basic roasts, and statistics for top coffee-producing countries (with links to country maps). The site contains a National Geographic magazine article about coffee from 1981; a list of related books and articles; and links to related websites. Site visitors will also find a Coffee Talk forum, which has not seen much activity in the past year, but has the potential to be a center for coffee-related conversation on the Web.

40

National Geographic: Blue Whales  

NSDL National Science Digital Library

As a cameraman leans in to get a shot of a blue whale, this massive creature glides through the water off of Costa Rica. That's the opening photograph that visitors to this interactive article from National Geographic are presented with, and it's a rather amazing image. This interactive article and feature is derived from a March 2009 feature in the print edition of National Geographic magazine, and it features the photography of Flip Nicklin and the writing of Ken Brower. The article offers an in-depth look into the recovery of the blue whale population off the coast of Costa Rica in recent years, and along the way visitors can stop off to take a look at a special photo gallery, take a quiz on these remarkable creatures, and also watch a video the provides the story behind one of Nicklin's photographs.

Brower, Ken; Nicklin, Flip

41

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

42

National Geographic: Maps  

NSDL National Science Digital Library

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.

2012-01-13

43

Geographic Variations in Risk  

PubMed Central

Background Chronic obstructive pulmonary disease (COPD) is an important cause of mortality with marked geographic variations in Great Britain. Additional factors beyond cigarette smoking are likely to influence these variations, but direct information on smoking by area is not readily available. We compared methods of jointly modeling the spatial distribution of mortality from COPD and lung cancer, using the latter as a proxy for smoking, to identify areas in which risk factors other than smoking may be important. Methods We obtained district-level mortality and population data for men aged 45 years or older in 1981–1999 in Great Britain. Three models were compared: Bayesian ecological regression using observed (model 1) or spatially smoothed (model 2) lung cancer standardized mortality ratio (SMR) as a smoking proxy, and bivariate regression (model 3) treating smoking as a spatial latent variable common to both diseases. Results Model selection criteria favored models 2 and 3 over model 1. Between 9% (model 3) and 25% (model 2) of spatial variation in COPD mortality was estimated to be unrelated to smoking. After adjustment for lung cancer as a proxy for smoking, both models showed similar geographic patterns of higher COPD mortality in conurbation and mining areas, historically associated with heavy industry and higher air pollution levels. Conclusions Joint modeling of multiple diseases can be used to investigate geographic variations in risk. These models reveal patterns that are adjusted for the effects of shared area-level risk factors for which no direct data are available. PMID:19318951

Best, Nicky; Hansell, Anna Louise

2010-01-01

44

Geographic data from space  

USGS Publications Warehouse

Space science has been called “the collection of scientific problems to which space vehicles can make some specific contributions not achievable by ground-based experiments.” Geography, the most spatial of the sciences, has now been marked as one of these “space sciences.” The National Aeronautics and Space Administration (NASA) is sponsoring an investigation to identify the Potential geographic benefits from the nation’s space program. This is part of NASA’s long-range inquiry to determine the kinds of scientific activities which might profitably be carried out on future space missions. Among such future activities which are now being planned by NASA are a series of manned earth orbital missions, many of which would be devoted to research. Experiments in physics, astronomy, geophysics, meteorology, and biology are being discussed for these long-range missions. The question which is being put to geographers is, essentially, what would it mean to geographic research to have an observation satellite (or many such satellites) orbiting the earth, gathering data about earth-surface features and environments?

Alexander, Robert H.

1964-01-01

45

Geographic Landscape of Place Names.  

ERIC Educational Resources Information Center

Explores the origins of many geographic place names. Suggests that using toponyms (place names) to study geographic conditions of an area offers rich diversity for the teaching of map skills and regional geography. (DH)

Gritzner, Charles F.

1988-01-01

46

Geographic Literacy and Young Learners.  

ERIC Educational Resources Information Center

Discusses concerns about geographic illiteracy and research on children's formation of geographic concepts. Elaborates five themes for teaching geography to young children: location, place, human-environment interaction, movement, and region. (Contains 17 references.) (SK)

Schoenfeldt, Melinda

2001-01-01

47

State and Power after Neoliberalism in Bolivarian Venezuela.  

E-print Network

??ABSTRACTState and Power after Neoliberalism in Bolivarian VenezuelaDonald V. KingsburyState and Power after Neoliberalism in Bolivarian Venezuela examines the limits and possibilities of collective subject… (more)

Kingsbury, Donald V.

2012-01-01

48

GEOGRAPHIC NAMES INFORMATION SYSTEM (GNIS)  

EPA Science Inventory

The Geographic Names Information System (GNIS), developed by the U.S. Geological Survey in cooperation with the U.S. Board on Geographic Names (BGN), contains information about physical and cultural geographic features in the United States and associated areas, both current and h...

49

Improving exploration with geographical information system (GIS) technology  

SciTech Connect

Timely reliable access to data is required by Earth Scientists and Engineers evaluating geology, facilities, environment, and new business opportunities. Geographical Information System (GIS) technology has been recently implemented to provide efficient and comprehensive access to data for exploration work in Venezuela. The GIS allows rapid comparisons, queries, sorting, and evaluation of data that in the past required multiple hardware platforms, multiple software packages, paper plots, spreadsheets, and time. A vendor GIS database package formed the foundation. This GIS provided regional coverage for the entire country of Venezuela at a scale of 1:250,000. It included 36,000 wells and associated attributes, facilities, geologic maps, potential field data, and transportation networks. Essential with GIS, all of the data were transformed from multiple cartographic datums to a single map projection. Proprietary and other tabular databases were incorporated into the vendor GIS by Chevron, significantly upgrading the value of the system for company exploration. Tabular databases were either imported, linked or converted to the GIS. They included Nomad, Paradox, Oracle, Openworks, and PC-based spreadsheets containing wells, seismic, and geochemistry data. Nontabular data types incorporated into the GIS included digital outcrop log and paleosections, maps, other GIS data, Global Positioning System control points, satellite imagery and scanned photographs. The enhanced GIS has proven valuable for facilitating access to, and rapid and accurate evaluation of, large geographic areas with multiple data sources and types.

Goodwin, P.B.; Choiniere, M.R.; Harris, F.W. [Chevron Overseas Petroleum, Inc., San Ramon, CA (United States)] [and others

1996-12-31

50

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

PubMed

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

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

1980-07-01

51

National Geographic Education: Ecosystems  

NSDL National Science Digital Library

The National Geographic Education website has a number of sections dedicated to different areas within the natural sciences. This particular section brings together all manner of educational resources related to ecosystems. On the site, visitors can dive in via the Latest Updates for Ecosystems. Here they can learn how to explore the profiled ecosystems via a range of GIS tools. Visitors can use the filters on the site to look over the resources by Type, Grades & Ages, Intended Audience, and Subjects. Visitors shouldn't miss looking over features like the Amazon Gold Mine, Back to the Bottom, and African Savanna.

2013-06-13

52

Geographic information systems  

NASA Technical Reports Server (NTRS)

Information and activities are provided to: (1) enhance the ability to distinguish between a Geographic Information System (GIS) and a data management system; (2) develop understanding of spatial data handling by conventional methods versus the automated approach; (3) promote awareness of GIS design and capabilities; (4) foster understanding of the concepts and problems of data base development and management; (5) facilitate recognition of how a computerized GIS can model conditions in the present "real world" to project conditions in the future; and (6) appreciate the utility of integrating LANDSAT and other remotely sensed data into the GIS.

Campbell, W. J.

1982-01-01

53

Investigation into the hydrocarbon sector in Venezuela  

Microsoft Academic Search

Technological dependence constitutes a fundamental difficulty which confronts developing countries. The Venezuelan economy depends almost exclusively on the hydrocarbon industry, being characterized so that its efficiency rests above the bases of technological advances. The fundamental aspects, priorities, resources, and the actions which should be taken because Venezuela may be confronted with a decision on technological dependence of the National Petroleum

Ferrer

2009-01-01

54

The history of aeronautical medicine in Venezuela  

NASA Technical Reports Server (NTRS)

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.

Iriarte, D. R.

1986-01-01

55

Promoting Vetiver Grass Technology in Venezuela  

Microsoft Academic Search

A two year project (1997-99) was conducted by the Sociedad Conservacionista Aragua (Sca) with financial and technical support of The Vetiver Network (TVN), and sponsored by other local institutions like the Aragua's State Secretary of the Environment and the Central University of Venezuela. Twelve workshops were organized and more than three hundred participants received training on vetiver grass technology (VGT).

Oscar S. Rodríguez

56

National Geographic Traveler  

NSDL National Science Digital Library

The staff at the National Geographic Traveler magazine knows a thing or two about travel, and their print magazine is full of thoughtful suggestions about where to go in Providence, how to wander around in Bangkok, and the lighthouses of Croatia. Sprinkled across the top of the web page, visitors will find topical areas, which include "Photo of the Week", "Intelligent Travel Blog", and "Newsletter". The "Intelligent Travel Blog" is a great place to start, and there are posts on an annual worm charming festival in the United Kingdom and the value of travel for school-age children. The "Photo of the Week" features dhow boats racing, the Singapore waterfront, and other visual gems. Also, visitors can check out their archives, sign up to receive their newsletter, and subscribe to the print edition of the magazine.

57

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.

58

Geographic names information system  

USGS Publications Warehouse

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.

U.S. Geological Survey

1987-01-01

59

Canadian Geographic Atlas Online  

NSDL National Science Digital Library

Online atlases vary widely in quality, but this latest project from the Royal Canadian Geographical Society is a laudable production both in terms of its organization and also its multi-layered content. This highly interactive atlas allows users to explore all of Canada's landforms and boundaries through a pop-up atlas browser that includes a sophisticated, yet easy-to-use, interface tool by which users can zoom in or out, measure distances, and even print out the maps they create. Some of the additional features let users explore the country thematically by region (such as the Boreal Shield) or by the dynamic theme of "Extremes of Weather". There is even a "Kid's Atlas", which is specifically designed for young people with the hope that they will also learn a great deal about Canadian places and geography. Much of the material on the site is also available in French.

60

Fine-Tuning Geographical Profiling  

Microsoft Academic Search

\\u000a Geographical profiling is an investigative technique that analyzes the spatial pattern of a related series of crime locations\\u000a in order to predict the location of the offender’s residence. After explaining how today’s geographical profiling works, it\\u000a is argued that such profiling may be improved if characteristics of the offense, the offender, and geographical circumstances\\u000a are taken into account. Following that,

Jasper J. van der Kemp; Peter J. van Koppen

61

New Maracaibo plant called most advanced. [Venezuela  

Microsoft Academic Search

A new gas-injection plant, recently put on stream, raises to 10 the number of oil-field-repressuring facilities in Lake Maracaibo, Venezuela. The combined capacity of these installations is 2,015 MMcfd. The new plant is Menegas I, the most advanced ever built. The 45 MMcfd unit is owned and operated by Mene Grande Oil Co.; it is located in the Ceuta field

1970-01-01

62

Coloring geographical threshold graphs  

SciTech Connect

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.

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

2008-01-01

63

Geographic Perspectives of Air Transportation  

Microsoft Academic Search

Past, present, and future research directions and advances in this highly dynamic research area of air transportation are reviewed with an eye toward geographers' contributions to the air transportation industry. The study of air transportation within the field of transportation geography and the larger discipline of geography is important as geographers use air transportation to help describe concepts such as

Timothy M. Vowles

2006-01-01

64

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

65

National Center for Geographic Information  

E-print Network

was titled "Case Study Research Methods for Geographic Information Systems" (Onsrud, Pinto, and Azad 1992 Methodology for MIS Case Studies" (Lee 1989). The "Case Study Research Methods" paper was used subsequently, and B. Azad (1992) Case study research methods for geographic information systems. URISA Journal, 4(l

California at Santa Barbara, University of

66

Determinants of Dentists' Geographic Distribution.  

ERIC Educational Resources Information Center

A model for explaining the geographic distribution of dentists' practice locations is presented and applied to particular market areas in Connecticut. Results show geographic distribution is significantly related to a few key variables, including demography, disposable income, and housing prices. Implications for helping students make practice…

Beazoglou, Tryfon J.; And Others

1992-01-01

67

GEAR Tech-21 Geographic Coordinates  

E-print Network

GEAR Tech-21 Geographic Coordinates 1 Established Goals Activity Outline Activity Timeline Knowledge and Skills Essential Vocabulary Explorers will know ... Every location on Earth has a unique pair model of the Earth used by GPS. Latitude ­ geographic position in North-South direction and changes

Farritor, Shane

68

Common Distribution Patterns of Marsupials Related to Physiographical Diversity in Venezuela  

PubMed Central

The aim of this study is to identify significant biotic regions (groups of areas with similar biotas) and biotic elements (groups of taxa with similar distributions) for the marsupial fauna in a part of northern South America using physiographical areas as Operational Geographical Units (OGUs). We considered Venezuela a good model to elucidate this issue because of its high diversity in landscapes and the relatively vast amount of information available on the geographical distribution of marsupial species. Based on the presence-absence of 33 species in 15 physiographical sub-regions (OGUs) we identified Operational Biogeographical Units (OBUs) and chorotypes using a quantitative analysis that tested statistical significance of the resulting groups. Altitudinal and/or climatic trends in the OBUs and chorotypes were studied using a redundancy analysis. The classification method revealed four OBUs. Strong biotic boundaries separated: i) the xerophytic zone of the Continental coast (OBU I); ii) the sub-regions north of the Orinoco River (OBU III and IV); and those south to the river (OBU II). Eleven chorotypes were identified, four of which included a single species with a restricted geographic distribution. As for the other chorotypes, three main common distribution patterns have been inferred: i) species from the Llanos and/or distributed south of the Orinoco River; ii) species exclusively from the Andes; and iii) species that either occur exclusively north of the Orinoco River or that show a wide distribution throughout Venezuela. Mean altitude, evapotranspiration and precipitation of the driest month, and temperature range allowed us to characterize environmentally most of the OBUs and chorotypes obtained. PMID:24806452

Ventura, Jacint; Bagaria, Guillem; Sans-Fuentes, Maria Assumpcio; Perez-Hernandez, Roger

2014-01-01

69

Whither Geographic Information Science? The Varenius Project  

Microsoft Academic Search

Abstract This paper introduces a special issue of the journal on the subject of Project Varenius, a three-year effort funded by the US National Science Foundation to advance geographic information science. Geographic information is first defined as an abstraction of primitive tuples linking geographic locations to general descriptors. Geographic concepts originate in the human mind, and are instantiated in geographic

Michael F. Goodchild; Max J. Egenhofer; Karen K. Kemp; David M. Mark; Eric Sheppard

70

New Techniques for Geographic Routing  

E-print Network

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 ...

Leong, Ben

2006-06-14

71

New techniques for geographic routing  

E-print Network

As wireless sensor networks continue to grow in size, we are faced with the prospect of emerging wireless networks with hundreds or thousands of nodes. Geographic routing algorithms are a promising alternative to tradition ...

Leong, Ben Wing Lup

2006-01-01

72

78 FR 77423 - Ferrosilicon From the Russian Federation and Venezuela: Postponement of Preliminary...  

Federal Register 2010, 2011, 2012, 2013

...Ferrosilicon From the Russian Federation and Venezuela: Postponement...on ferrosilicon from the Russian Federation (``Russia'') and Venezuela.\\1\\ The Initiation...See Ferrosilicon From the Russian Federation and Venezuela:...

2013-12-23

73

77 FR 59970 - Silicomanganese From India, Kazakhstan, and Venezuela; Institution of Five-Year Reviews...  

Federal Register 2010, 2011, 2012, 2013

...Silicomanganese From India, Kazakhstan, and Venezuela...silicomanganese from India, Kazakhstan, and Venezuela...currently valid Office of Management and Budget (OMB) number...silicomanganese from India, Kazakhstan, and Venezuela...reasonably foreseeable time. It will assess...

2012-10-01

74

Geographical Parthenogenesis: Opportunities for Asexuality  

Microsoft Academic Search

\\u000a Asexual organisms often occupy larger and more northern distribution areas than their sexual relatives. These phenomena, summarized\\u000a under the term “geographical parthenogenesis”, seem to confirm a short term advantage of asexual reproduction. Geographical\\u000a parthenogenesis may be explained by better colonizing abilities of asexual organisms, or by a swamping of sexual populations\\u000a because of introgression of asexuality. Asexual organisms may perform

Elvira Hörandl

75

Geographic media literacy: an introduction  

Microsoft Academic Search

In a media saturated world of globalization, information flow and knowledge economies, an interesting paradox exists: geographic\\u000a literacy appears to be on the decline while geographic information is on the rise. In this introduction to a collection of\\u000a essays on geographies of the media, we explore this paradox and use Baudrillard’s (1994) work on Simulacra and Simulation to argue that

Chris Lukinbeal; Jim Craine

2009-01-01

76

Transportation Routing Analysis Geographic Information System (TRAGIS)  

E-print Network

Transportation Routing Analysis Geographic Information System (TRAGIS) Model and Network Databases The Transportation Routing Analysis Geographic Information System (TRAGIS) model is a geographic information system tool for modeling transportation routing. TRAGIS offers numerous options for route calculation

77

International Marketing Information Service: Country Market Survey. Venezuela.  

National Technical Information Service (NTIS)

Venezuela, with its high gross national product, sound economy, stable government, and orientation twoard U.S. suppliers, must be regarded as one of the best U.S. overseas markets. Among Latin American countries, in 1968, Venezuela ranked second as a purc...

H. J. Mueller

1969-01-01

78

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.

79

CARTECH: A Prototype of Geographical Information System  

Microsoft Academic Search

In this paper all major issues related to definition, design and implementation of a prototype of the geographical information system CARTECH are presented and discussed. The prototype proposes solutions for the most important requirements for geographical information systems (GIS). Namely, the double nature (spatial and descriptive) of geographical data, the fact that querying geographical information usually involves the specification of

Franco Arcieri; Enrico Nardelli; Maurizio Talamo

1994-01-01

80

Evaluating geographic information systems technology  

USGS Publications Warehouse

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.

Guptill, Stephen C.

1989-01-01

81

BIODIVERSITY A highly aggregated geographical  

E-print Network

in species richness is associated with habitat factors related to both propagule pressure and invasibilityBIODIVERSITY RESEARCH A highly aggregated geographical distribution of forest pest invasions, USA, 2 Deptartment of Entomology and Deptartment of Forestry, Michigan State University, East Lansing

Liebhold, Andrew

82

Geographic Proximity and Enrollment Competition.  

ERIC Educational Resources Information Center

The use of a measure of geographic proximity to help explain enrollment competition among postsecondary institutions was investigated. The measure, the number of miles between institutions, was obtained by determining the longitude and latitude coordinates for about 99% of the schools in the Higher Education General Information System universe.…

Zammuto, Raymond F.

83

Maps and Geographic Information Systems  

Cancer.gov

This list provides links to maps and geographic information system (GIS) resources that may be of interest to cancer epidemiologists, but is not exhaustive. Access to resources is dependent on procedures outlined for each individual resource. Availability of data may depend on suitability of proposed research, collaboration with study investigators, ethical considerations, or approval from a steering committee.

84

Geographic profiling and animal foraging  

Microsoft Academic Search

Geographic profiling was originally developed as a statistical tool for use in criminal cases, particularly those involving serial killers and rapists. It is designed to help police forces prioritize lists of suspects by using the location of crime scenes to identify the areas in which the criminal is most likely to live. Two important concepts are the buffer zone (criminals

Steven C. Le Comber; Barry Nicholls; D. Kim Rossmo; Paul A. Racey

2006-01-01

85

Maryland Automated Geographic Information System  

NASA Technical Reports Server (NTRS)

A computer based system designed for storing geographic data in a consistent and coordinated manner is described. The data are stored, retrieved, and analyzed using a 400 km sq/acre cell. Stored information can be displayed on computer maps in a manner similar to standard map graphics. The data bank contains various information for performing land use analysis in a variety of areas.

Thomas, E. L.

1978-01-01

86

SOIL SURVEY GEOGRAPHIC DATABASE (SSURGO)  

EPA Science Inventory

This data set is a digital soil survey and is the most detailed level of soil geographic data developed by the National Cooperative Soil Survey. This data set consists of georeferenced digital map data and computerized attribute data. The map data are in a 7.5 minute quadrangle ...

87

The Mathematics of Geographic Profiling  

E-print Network

. It should take into account local geographic features that affect: a. The selection of a crime site; b testing it on actual crime series. #12;Existing Methods Spatial distribution strategies Probability (CrimeStat) Euclidean distance Decay functions Linear Negative exponential Normal Lognormal f d =ABd f d

O'Leary, Michael

88

Territorial Decentration and Geographic Learning.  

ERIC Educational Resources Information Center

Territorial decentration is a question of major significance to geographic educators. This paper reports the findings of a research project designed to determine the territorial decentration of an American sample of children. The primary purpose of the research was to determine if Piaget's territorial decentration stages are appropriate for…

Stoltman, Joseph P.

89

By Sergio Correa GEOGRAPHIC LOCATION  

E-print Network

Chile By Sergio Correa #12;GEOGRAPHIC LOCATION #12;POPULATION & RELIGION #12;INTERESTING PLACES BeveragesTerremoto Ponche de frutilla Chicha Ponche de Chirimoya Vino Melón con Vino #12;Traditional Sports & games El Rodeo El trompo y el emboque La rayuela La chueca Volantín El palo encebado #12;Popular Sports

Witten, Thomas A.

90

New species and records of Hydroptilidae (Trichoptera) from Venezuela  

PubMed Central

Abstract Eight new species of Hydroptilidae (Trichoptera) from Venezuela are described: Acostatrichia digitata sp. n., Hydroptila cressae sp. n., Metrichia botrychion sp. n., Ochrotrichia spira sp. n., Oxyethira bettyae sp. n., Oxyethira quiramae sp. n., Oxyethira redunca sp. n., and Rhyacopsyche shorti sp. n.New country records for Venezuela of 2 additional species, Neotrichia feolai Santos & Nessimian, 2009 and Oxyethira picita Harris & Davenport, 1999, are also provided. Illustrations of male genitalia are provided with each description. PMID:22577311

Thomson, Robin E.; Holzenthal, Ralph W.

2012-01-01

91

[Increasing difficulties for scientific publication in Venezuela].  

PubMed

A very important increase in the costs of the edition of scientific journals has taken place in Venezuela, due to difficulties in obtaining imported free acid paper and other materials used for handling documents. Like other journals, Investigaci6n Clinica has been considering switching completely to a digital publication format; however there are several reasons that prevent us to doing it at this time: the journal is distributed in printed form to many national institutions, which do not have immediate access to digital information. In addition, there exists a commitment of shipment of printed issues for some international indices and in exchange with other national and foreign journals, whose printed format we receive. Another important aspect is that our University maintains a weak technological platform that makes difficult the immediacy required for the interchange with authors and consulted referees of received papers; and there is a latent danger of limitations in the use of digital technologies, due to current national politic problems. Consequently, we need to continue with the printed format, but must reduce the amount of printed issues, so as not to limit the number of papers published in each edition. Nevertheless, there is an ever increasing number of contributions from foreign researches and Investigaci6n Clinica has been recently included in two new international indices, the SEIIC from Argentina and the Infobase Index from India, reasons that obligate us to maintain our levels of excellence and commitment to our authors and readers. PMID:24758096

Ryder, Elena

2014-03-01

92

Geographic Analysis of Cultural Consumption  

Microsoft Academic Search

\\u000a In this chapter, the authors make use of a large database on ticket sales relating to the performing arts in London to investigate\\u000a the propensities at which different sociodemographic groups use cultural provision and to develop an ecological model of attendance\\u000a which includes derived variables relating to the geographical accessibility of purchasing addresses and commuting patterns.\\u000a They find that the

Orian Brook; Paul Boyle; Robin Flowerdew

93

Geographic Information System Data Analysis  

NASA Technical Reports Server (NTRS)

Data was collected in order to further NASA Langley Research Center's Geographic Information System(GIS). Information on LaRC's communication, electrical, and facility configurations was collected. Existing data was corrected through verification, resulting in more accurate databases. In addition, Global Positioning System(GPS) points were used in order to accurately impose buildings on digitized images. Overall, this project will help the Imaging and CADD Technology Team (ICTT) prove GIS to be a valuable resource for LaRC.

Billings, Chad; Casad, Christopher; Floriano, Luis G.; Hill, Tracie; Johnson, Rashida K.; Locklear, J. Mark; Penn, Stephen; Rhoulac, Tori; Shay, Adam H.; Taylor, Antone; Thorpe, Karina

1995-01-01

94

47 CFR 10.450 - Geographic targeting.  

Code of Federal Regulations, 2010 CFR

...COMMUNICATIONS COMMISSION GENERAL COMMERCIAL MOBILE ALERT SYSTEM Alert Message Requirements § 10.450 Geographic targeting...establishes minimum requirements for the geographic targeting of Alert Messages. A Participating CMS Provider will...

2010-10-01

95

47 CFR 10.450 - Geographic targeting.  

Code of Federal Regulations, 2011 CFR

...COMMUNICATIONS COMMISSION GENERAL COMMERCIAL MOBILE ALERT SYSTEM Alert Message Requirements § 10.450 Geographic targeting...establishes minimum requirements for the geographic targeting of Alert Messages. A Participating CMS Provider will...

2011-10-01

96

47 CFR 10.450 - Geographic targeting.  

Code of Federal Regulations, 2013 CFR

...COMMUNICATIONS COMMISSION GENERAL WIRELESS EMERGENCY ALERTS Alert Message Requirements § 10.450 Geographic targeting...establishes minimum requirements for the geographic targeting of Alert Messages. A Participating CMS Provider will...

2013-10-01

97

47 CFR 10.450 - Geographic targeting.  

Code of Federal Regulations, 2012 CFR

...COMMUNICATIONS COMMISSION GENERAL COMMERCIAL MOBILE ALERT SYSTEM Alert Message Requirements § 10.450 Geographic targeting...establishes minimum requirements for the geographic targeting of Alert Messages. A Participating CMS Provider will...

2012-10-01

98

On the units of geographical economics  

Microsoft Academic Search

The new `geographical economics' introduced by Paul Krugman and others has been dismissed by geographers for a number of reasons, ranging from (mis)treatment of externalities to reliance on formal modelling. These criticisms may be appropriate, but they miss some underlying unit assumptions that cause geographical economics to deal poorly with issues of scale and space. The theories produced by Krugman

Joshua Olsen

2002-01-01

99

How a Geographer Looks at Globalism.  

ERIC Educational Resources Information Center

Argues a global perspective is inherent to all geographic research and education. Quotes several influential geographers concerning their views on globalism and geography as a discipline. Examines geography's five fundamental themes and their applicability to a global perspective. Considers roles geographers can play in solving world environmental…

Natoli, Salvatore J.

1990-01-01

100

Constraint Databases and Geographic Information Systems  

Microsoft Academic Search

Constraint databases and geographic information systems share many applications. However, constraint databases can go beyond geographic information systems in efficient spatial and spatiotemporal data handling methods and in advanced applications. This survey mainly describes ways that constraint databases go beyond geographic informa- tion systems. However, the survey points out that in some areas con- straint databases can learn also from

Peter Z. Revesz

2007-01-01

101

Global Geographical Knowledge of Today's Business Students  

Microsoft Academic Search

Geographical knowledge of foreign countries is a crucial variable for successfully marketing goods and services in overseas markets. This fact calls into question the level of geographical expertise possessed by today's undergraduate students majoring in business-who are likely to be the international marketers of the future. This article reports the results of a study of the geographical knowledge-as measured by

Richard T Hise

1991-01-01

102

Malaria Control and Elimination,1 Venezuela, 1800s-1970s  

PubMed Central

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.

Villegas, Leopoldo; Udhayakumar, Venkatachalam

2014-01-01

103

Malaria control and elimination, Venezuela, 1800s –1970s.  

PubMed

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. PMID:25396258

Griffing, Sean M; Villegas, Leopoldo; Udhayakumar, Venkatachalam

2014-10-01

104

Geographic profiling and animal foraging.  

PubMed

Geographic profiling was originally developed as a statistical tool for use in criminal cases, particularly those involving serial killers and rapists. It is designed to help police forces prioritize lists of suspects by using the location of crime scenes to identify the areas in which the criminal is most likely to live. Two important concepts are the buffer zone (criminals are less likely to commit crimes in the immediate vicinity of their home) and distance decay (criminals commit fewer crimes as the distance from their home increases). In this study, we show how the techniques of geographic profiling may be applied to animal data, using as an example foraging patterns in two sympatric colonies of pipistrelle bats, Pipistrellus pipistrellus and P. pygmaeus, in the northeast of Scotland. We show that if model variables are fitted to known roost locations, these variables may be used as numerical descriptors of foraging patterns. We go on to show that these variables can be used to differentiate patterns of foraging in these two species. PMID:16263134

Le Comber, Steven C; Nicholls, Barry; Rossmo, D Kim; Racey, Paul A

2006-05-21

105

The Geographic Flow of Music  

E-print Network

The social media website last.fm provides a detailed snapshot of what its users in hundreds of cities listen to each week. After suitably normalizing this data, we use it to test three hypotheses related to the geographic flow of music. The first is that although many of the most popular artists are listened to around the world, music preferences are closely related to nationality, language, and geographic location. We find support for this hypothesis, with a couple of minor, yet interesting, exceptions. Our second hypothesis is that some cities are consistently early adopters of new music (and early to snub stale music). To test this hypothesis, we adapt a method previously used to detect the leadership networks present in flocks of birds. We find empirical support for the claim that a similar leadership network exists among cities, and this finding is the main contribution of the paper. Finally, we test the hypothesis that large cities tend to be ahead of smaller cities-we find only weak support for this hy...

Lee, Conrad

2012-01-01

106

New advances in molecular epizootiology of canine hematic protozoa from Venezuela, Thailand and Spain.  

PubMed

The prevalence of hematozoan infections (Hepatozoon canis and Babesia sp., particularly Babesia canis vogeli) in canids from Venezuela, Thailand and Spain was studied by amplification and sequencing of the 18S rRNA gene. H. canis infections caused simultaneously by two different isolates were confirmed by RFLP analysis in samples from all the geographic regions studied. In Venezuela, blood samples from 134 dogs were surveyed. Babesia infections were found in 2.24% of the dogs. Comparison of sequences of the 18S rRNA gene indicated that protozoan isolates were genetically identical to B. canis vogeli from Japan and Brazil. H. canis infected 44.77 per cent of the dogs. A representative sample of Venezuelan H. canis isolates (21.6% of PCR-positives) was sequenced. Many of them showed 18S rRNA gene sequences identical to H. canis Spain 2, albeit two less frequent genotypes were found in the sample studied. In Thailand, 20 dogs were analyzed. No infections caused by Babesia were diagnosed, whereas 30 per cent of the dogs were positive to hematozoan infection. Two protozoa isolates showing 99.7-100% identity to H. canis Spain 2 were found. In Spain, 250 dogs were studied. B. canis vogeli infected 0.01% of the animals. The sequence of the 18S rRNA gene in Spanish isolates of this protozoa was closely related to those previously deposited in GenBank (> 99% identity). Finally, 20 red foxes were screened for hematozoans employing semi-nested PCR and primers designed to detect Babesia/Theileria. Fifty percent of the foxes were positive to Theileria annae. In addition, it was found that the PCR assay was able as well to detect Hepatozoon infections. Thirty five percent of the foxes were infected with two different H. canis isolates showing 99.8-100% identity to Curupira 1 from Brazil. PMID:17088022

Criado-Fornelio, A; Rey-Valeiron, C; Buling, A; Barba-Carretero, J C; Jefferies, R; Irwin, P

2007-03-31

107

Current Space Projects of the Bolivarian Republic of Venezuela  

NASA Astrophysics Data System (ADS)

Since 2008, with the successful launch of the first Venezuelan telecommunication satellite VENESAT-1, the Bolivarian Republic of Venezuela became an active player in the international space sector aimed at using space science and technology as a powerful tool to promote the national development. Based on that, through the Bolivarian Agency for Space Activities (ABAE), Venezuela has been implemented several space projects such as the manufacturing and launch of the first Venezuelan remote sensing satellite, the construction of a design center for small satellite technologies, as well as research and development activities related with the estimation of the physical properties of the Earth. This paper presents a brief description of the current space projects that are being developed by Venezuela.

Hernández, R.; Acevedo R.; Varela, F.; Otero, S.

2014-06-01

108

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

PubMed Central

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

Linero-Arana, Ildefonso; Diaz Diaz, Oscarn

2011-01-01

109

47 CFR 27.805 - Geographic partitioning and spectrum disaggregation.  

Code of Federal Regulations, 2010 CFR

... 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...

2010-10-01

110

47 CFR 27.805 - Geographic partitioning and spectrum disaggregation.  

Code of Federal Regulations, 2011 CFR

... 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...

2011-10-01

111

47 CFR 27.904 - Geographic partitioning and spectrum disaggregation.  

Code of Federal Regulations, 2010 CFR

... 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...

2010-10-01

112

47 CFR 27.904 - Geographic partitioning and spectrum disaggregation.  

Code of Federal Regulations, 2011 CFR

... 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...

2011-10-01

113

Cultural and Historical Geographies of Geographical focus: UK  

E-print Network

& Opportunities Geographical focus: UK Award: £134,176 Genetics, Genomics and Genetic Modification Geographical Geographical focus: UK Award: £3,963 Weather Walks, Weather Talks Geographical focus: North Pennines Award: £72

Nottingham, University of

114

The Geographical Dimension of Terrorism  

NASA Astrophysics Data System (ADS)

The events of September 11 ushered us all into a world in which our security and sense of invulnerability were savagely replaced by vulnerability and irrational fear. To the delight of our adversaries who planned these attacks, we often responded in ways that furthered their agenda by weakening the cultural colossus that we call home. Normally terrorism is viewed as intense but localized violence. Seldom is terrorism viewed in its more expansive dimensions. It is burned into our collective memories as a collapsed building, a shattered bus, an incinerated nightclub, or facilities closed by a few anthrax-laced letters. However, terrorism must be studied in dimensions larger than the view from a news camera. This conclusion forms the intellectual basis for The Geographical Dimension of Terrorism.

Hawkins, Houston T.

115

Tarahumara People: National Geographic Magazine  

NSDL National Science Digital Library

The Tarahumara people of northern Mexico are well known for their long-distance running ability, and they have survived a variety of challenges over the past five hundred years, including the influx of Spanish conquistadors into their region. Recently, National Geographic sent Cynthia Gorney and photographer Robb Kendrick to take an investigative look into this unique group of people. Visitors can read their account here on this interactive feature, which contains both the published text and the accompanying photographs. The article looks at how the Tarahumara are coping with the increasing pressures of modernity, along with offering some commentary on their own cultural and social milieu. Additionally, visitors should not miss the GeoPedia article on the Tarahumara, as it features other online resources about them and an extensive bibliography.

116

Teachers Homepage: National Geographic Education  

NSDL National Science Digital Library

The National Geographic Education website is a wonderful find, as it includes resources for educators who wish to incorporate spatial knowledge, cultural geography, and a wide range of related subjects into their classrooms. The Fast Fact on the top left-hand side of the page is a great place to start: it currently features information on how to make a simple compass and understand navigation. Moving along, the Teaching Resources area contains teaching units on political boundaries, the environmental conditions in the solar system, and extreme weather. One particularly fun area here is the Graphic Organizers Collection. Here visitors can download an assortment of blank, black-and-white graphic organizers that are designed to help students with problem solving, decision making, studying, planning research, brainstorming, and writing. The site is rounded out (appropriately enough) by the What is Geo-Literacy? section. Here visitors can look at cartoons, articles, and videos that talk about the importance of this subject.

2012-07-13

117

MODIS detects oil spills in Lake Maracaibo, Venezuela  

Microsoft Academic Search

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

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

2003-01-01

118

Anthropogenically induced fish diversity reduction in Lake Valencia Basin, Venezuela  

Microsoft Academic Search

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

Héctor López-Rojas; Ana L. Bonilla-Rivero

2000-01-01

119

TEMPORAL AND SPATIAL PATTERNS OF MALARIA REINFECTION IN NORTHEASTERN VENEZUELA  

Microsoft Academic Search

We stratified the risk of malaria transmission (Plasmodium vivax) in 35 villages along a coastal range in northeastern Venezuela (51 km2) where the main vector is the mosquito Anopheles aquasalis. After 20 years without local malaria transmission, reinfection of the entire area occurred from May to December 1985 by local (continuous) and jump (discontinuous) dispersal. Epidemiologic, environmental, and vector variables

ROBERTO BARRERA; MARIA E. GRILLET; YADIRA RANGEL; JESUS BERTI

1999-01-01

120

Molecular Epidemiologic Source Tracking of Orally Transmitted Chagas Disease, Venezuela  

PubMed Central

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

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

2013-01-01

121

[Epidemiology of ophidism in Venezuela (1996-2004)].  

PubMed

The data of accidents caused by snakebites in Venezuela, registered at the morbidity statistics of the Direction of Epidemiology and Strategic Analysis of the Ministry of Health and Social Development were analyzed. During the years of 1996-2004, 53,792 snakebites were registered in Venezuela (5,976 cases average per year), with a higher incidence during the year 2004 (7,486 incidents). Zulia reported the highest frequency of all the states (5,975 cases); meanwhile the Midwestern region, constituted by Lara, Portuguesa, Falc6n and Yaracuy states, had a higher morbidity for snake bites. The highest incidence, distributed per states was registered in Cojedes, during the year 2001, with 228.72 cases per 100,000 inhabitants. When it was determined by regions, the highest incidence occurred during the year 2004 at los Llanos with 63.81 per 100,000 inhabitants. The median of the incidence rate for Venezuela during the period was of 21.46 accidents per 100,000 inhabitants. The classification of the endemic areas for ophidism, according to the percentiles 23, 50, 75 and 90, organized the country in: (a) states and regions of very high endemicity, (b) high endemicity, (c) middle, (d) low and (e) very low endemicity. These epidemiological data indicated that the accidents caused by snakes constitute a collective health problem in Venezuela. PMID:23947002

De Sousa, Leonardo; Bastouri-Carrasco, Jessica; Matos, Mercedes; Borges, Adolfo; Bónoli, Stefano; Vásquez-Suárez, Aleikar; Guerrero, Belsy; Rodríguez-Acosta, Alexis

2013-06-01

122

Explaining left-wing electoral success in Brazil and Venezuela  

Microsoft Academic Search

While the electoral victories of the Brazil's Partido dos Trabahaldores (PT) and Venezuela's Movimiento Quinta Republica (MVR) represent a strengthening of democratic electoral mechanisms as a vehicle for both the expression of popular opinion, and socially egalitarian policy, it may equally represent a continuation of political instability, in which frequent shifts in political preferences contribute to both countries' difficulties in

Stephanie Stern

2004-01-01

123

Paleoseismology in Venezuela: Objectives, methods, applications, limitations and perspectives  

Microsoft Academic Search

The privileged location of Venezuela along an active interplate deformation belt, despite of being a ``so-called'' developing country, has led to a long paleoseismic tradition as attested by 45 trench assessments since 1968. Since then, a first 2-trench study was carried out by the American Woodward Clyde company across the Oca fault at Sinamaica. Since 1980, all further paleoseismic studies

Franck A. Audemard M

2005-01-01

124

Late Pleistocene carbonate dissolution in the Venezuela Basin, Caribbean Sea  

SciTech Connect

Piston cores from water depths greater than 4000 m in the Venezuela Basin (Caribbean Sea) provide continuous late Pleistocene records of carbonate dissolution and accumulation. The authors examination of multiple dissolution indices indicate that, at least for the last 150,000 years, dissolution of carbonate in the Venezuela Basin has been more intense during interglacial than glacial periods, a pattern opposite to more general observations from the deep Atlantic and Gulf of Mexico. By virtue of its shallow sill depth (1815 m), the Venezuela Basin is relatively isolated from the mainstream of Atlantic thermohaline circulation, and presently is filled with homogeneous, relatively warm (3.8/sup 0/C) waters primarily derived from Upper North Atlantic Deep Water. During the last glacial, the enhanced preservation of carbonate in the Venezuela Basin suggests the presence of a less corrosive, more oxygenated water mass in the Atlantic near sill depth. However, this simple interpretations is potentially complicated by past changes in the rain of biogenic materials from surface waters to the deep basin in what must be an essentially closed system below sill depth. Their observations of increased interglacial dissolution may help to explain previously noted discrepancies in the local glacial to interglacial amplitude of delta/sup 18/O variations recorded by coccoliths and planktonic foraminifera.

Cofer-Shabica, N.B.; Peterson, L.C.

1985-01-01

125

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

NASA Astrophysics Data System (ADS)

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.

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

2010-12-01

126

Geographic Determinants of Chinese Urbanization  

NASA Astrophysics Data System (ADS)

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.

Mccord, G. C.; Christensen, P.

2011-12-01

127

Researching Volunteered Geographic Information: Spatial Data, Geographic Research, and New Social Practice  

Microsoft Academic Search

The convergence of newly interactive Web-based technologies with growing practices of user-generated content disseminated on the Internet is generating a remarkable new form of geographic information. Citizens are using handheld devices to collect geographic information and contribute it to crowd-sourced data sets, using Web-based mapping interfaces to mark and annotate geographic features, or adding geographic location to photographs, text, and

Sarah Elwood; Michael F. Goodchild; Daniel Z. Sui

2011-01-01

128

Researching Volunteered Geographic Information: Spatial Data, Geographic Research, and New Social Practice  

Microsoft Academic Search

The convergence of newly interactive Web-based technologies with growing practices of user-generated content disseminated on the Internet is generating a remarkable new form of geographic information. Citizens are using handheld devices to collect geographic information and contribute it to crowd-sourced data sets, using Web-based mapping interfaces to mark and annotate geographic features, or adding geographic location to photographs, text, and

Sarah Elwood; Michael F. Goodchild; Daniel Z. Sui

2012-01-01

129

A GEOGRAPHICAL MIGRATION PROBABILITY DENSITY FUNCTION1  

E-print Network

A GEOGRAPHICAL MIGRATION PROBABILITY DENSITY FUNCTION1 W.R. Tobler Professor of Geography University of California, Santa Barbara http://www.geog.ucsb.edu/people/tobler.htm Migration. Suppose that one has a collection of migration paths. Plotted on a geographical map they will appear

Tobler, Waldo

130

Geographical Gerontology: The constitution of a discipline  

Microsoft Academic Search

Health and healthcare have always been central considerations in geographical gerontology. This paper reviews progress in this part of the field over the past decade (1995–2006) and also looks to the future. It demonstrates how geographical gerontology is currently constituted of multiple fields of empirical interest studied by multiple academic disciplines. Specifically, the continuation and development of traditional perspectives on

Gavin J. Andrews; Malcolm Cutchin; Kevin McCracken; David R. Phillips; Janine Wiles

2007-01-01

131

On metonymy recognition for geographic IR  

Microsoft Academic Search

Metonymic location names refer to other, related entities and possess a meaning dierent from the literal, geographic sense. Metonymic names are to be treated dierently to im- prove performance of geographic information retrieval (GIR). This paper presents a method for disambiguating location names in textual information to distinguish literal and met- onymic senses, based on shallow features. The evaluation of

Johannes Leveling; Sven Hartrumpf

2006-01-01

132

Geographic Mobility of Allied Health Professionals  

ERIC Educational Resources Information Center

The geographic mobility of allied health personnel is of major concern to planners facing decisions about locating training programs; a New York study revealed that personnel trained in that State are not geographically mobile, living and working reasonably close to the educational institutions where they received their basic professional…

Greenberg, Suzanne B; Kadish, Joseph

1974-01-01

133

Global Geographical Knowledge of Business Students  

Microsoft Academic Search

Although geographical knowledge of foreign countries is a crucial factor in successfully marketing goods and services to international markets, an article in this Journalin 1991 reported on the low level of geographical knowledge about foreign countries possessed by students majoring in business at a large public university located in the United States. This article describes the results of a replication

Richard T. Hise; Moshe Davidow; Lisa Troy

1999-01-01

134

Geographic ranking for a local search engine  

Microsoft Academic Search

Traditional ranking schemes of the relevance of a Web page to a user query in a search engine are less appropriate when the search term contains geographic information. Often, geographic entities, such as addresses, city names, and location names, appear only once or twice in a Web page, and are typically not in a heading or larger font. Consequently, an

Tony Abou-assaleh; Weizheng Gao

2007-01-01

135

Development of intelligent geographical information systems  

Microsoft Academic Search

The analysis of geographical information is compared with other production processes in which a user can only accept an end-product if it meets certain quality requirements. Whereas users are responsible for defining the levels of quality they need to use the results of the analyses of geographical information systems in their work, database managers, experts and modellers could greatly assist

P. A. Burrough

1992-01-01

136

Teaching Geographic Field Methods Using Paleoecology  

ERIC Educational Resources Information Center

Field-based undergraduate geography courses provide numerous pedagogical benefits including an opportunity for students to acquire employable skills in an applied context. This article presents one unique approach to teaching geographic field methods using paleoecological research. The goals of this course are to teach students key geographic

Walsh, Megan K.

2014-01-01

137

GEOGRAPHICAL ASPECTS OF INVASION: THE ANNUAL BROMES  

Microsoft Academic Search

Among conservation biologists, there is great interest in developing rules to predict which alien species are most likely to become serious invaders. Invasion is both an ecological and a geographical process, but mostly ecological rules have been proposed. Studies of several weedy genera have found that invasion success correlates with the size of the species' native distribution. A geographical explanation

Mark A. Blumler

2006-01-01

138

Geographic Constraints on Social Network Groups  

PubMed Central

Social groups are fundamental building blocks of human societies. While our social interactions have always been constrained by geography, it has been impossible, due to practical difficulties, to evaluate the nature of this restriction on social group structure. We construct a social network of individuals whose most frequent geographical locations are also known. We also classify the individuals into groups according to a community detection algorithm. We study the variation of geographical span for social groups of varying sizes, and explore the relationship between topological positions and geographic positions of their members. We find that small social groups are geographically very tight, but become much more clumped when the group size exceeds about 30 members. Also, we find no correlation between the topological positions and geographic positions of individuals within network communities. These results suggest that spreading processes face distinct structural and spatial constraints. PMID:21483665

Gonzalez, Marta C.; Barabasi, Albert-Laszlo; Christakis, Nicholas A.

2011-01-01

139

Geographic constraints on social network groups.  

PubMed

Social groups are fundamental building blocks of human societies. While our social interactions have always been constrained by geography, it has been impossible, due to practical difficulties, to evaluate the nature of this restriction on social group structure. We construct a social network of individuals whose most frequent geographical locations are also known. We also classify the individuals into groups according to a community detection algorithm. We study the variation of geographical span for social groups of varying sizes, and explore the relationship between topological positions and geographic positions of their members. We find that small social groups are geographically very tight, but become much more clumped when the group size exceeds about 30 members. Also, we find no correlation between the topological positions and geographic positions of individuals within network communities. These results suggest that spreading processes face distinct structural and spatial constraints. PMID:21483665

Onnela, Jukka-Pekka; Arbesman, Samuel; González, Marta C; Barabási, Albert-László; Christakis, Nicholas A

2011-01-01

140

RE-EVALUATION OF THE GEOGRAPHIC DISTRIBUTION AND PHYLOGEOGRAPHY OF THE SIGMODON HISPIDUS COMPLEX BASED ON MITOCHONDRIAL DNA SEQUENCES  

PubMed Central

Geographic distribution among members of the Sigmodon hispidus complex (Sigmodon hirsutus, S. hispidus, and S. toltecus) were examined using DNA sequences from the mitochondrial cytochrome-b gene. Geographic distribution of each taxon was defined based on DNA sequences obtained from 69 samples (19 newly obtained and 50 from previous studies) collected from North, Central, and South America. These data indicated that S. hispidus is restricted to the southern one-half of the United States and northeastern Mexico (Nuevo León and Tamaulipas), S. toltecus occupies the eastern one-third of Mexico (central Tamaulipas) to northern Honduras, and S. hirsutus is distributed from central Chiapas and southeastern Oaxaca to northern South America (Venezuela). The newly collected data extend distributions of S. hispidus from the southern United States southward into northeastern Mexico and that of S. toltecus from Chiapas, Mexico, southward to Honduras. Genetic divergence and patterns of phylogeography were examined within each taxon. PMID:20613884

Bradley, Robert D.; Henson, Dallas D.; Durish, Nevin D.

2010-01-01

141

Dualism methodology in geographic information visualization  

NASA Astrophysics Data System (ADS)

The core of geographic information visualization is map making, which is characterized by the map maker usually being the map user. Potential map makers are becoming more and more, most of them are deficient in the knowledge background of cartography. It is necessary for them to derive popular map design knowledge from the complex map theories and methods to guide the practice of geographic information visualization. As an exploration into methodology, this paper has initially probed into and formed the conceptual model of geographic information visualization duality with dualistic analysis as the basic method, in the hope of establishing a framework which is easy to understand and to follow as a "map-making guide". The paper firstly expounds the theoretical basis of dualism from such aspects as geography, linguistics and philosophy; then elaborates the object matter of the methodology of dualism in geographic information visualization by developing from such two aspects as the signifier and the signified of geographic information visualization, with the semiotic linguistics as the paradigm; and finally draws a conclusion. Studies show that: the geographic information and the map design are of duality each other; the duality model of geographic information visualization is "easily understand" and "easily follow".

Han, Xuepei; Li, Manchun

2007-06-01

142

Potential geographical distribution of the red palm mite in South America.  

PubMed

Among pests that have recently been introduced into the Americas, the red palm mite, Raoiella indica Hirst (Prostigmata: Tenuipalpidae), is the most invasive. This mite has spread rapidly to several Caribbean countries, United States of America, Mexico, Venezuela, Colombia and Brazil. The potential dispersion of R. indica to other regions of South America could seriously impact the cultivation of coconuts, bananas, exotic and native palms and tropical flowers such as the Heliconiaceae. To facilitate the development of efficacious R. indica management techniques such as the adoption of phytosanitary measures to prevent or delay the dispersion of this pest, the objective of this paper was to estimate the potential geographical distribution of R. indica in South America using a maximum entropy model. The R. indica occurrence data used in this model were obtained from extant literature, online databases and field sampling data. The model predicted potential suitable areas for R. indica in northern Colombia, central and northern Venezuela, Guyana, Suriname, east French Guiana and many parts of Brazil, including Roraima, the eastern Amazonas, northern Pará, Amapá and the coastal zones, from Pará to north of Rio de Janeiro. These results indicate the potential for significant R. indica related economic and social impacts in all of these countries, particularly in Brazil, because the suitable habitat regions overlap with agricultural areas for R. indica host plants such as coconuts and bananas. PMID:23297112

Amaro, George; de Morais, Elisangela Gomes Fidelis

2013-07-01

143

Radioisotope Concentration in Lake Sediments of Maracaibo, Venezuela  

SciTech Connect

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.

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

144

CR Mission ORENOQUE Venezuela 07 25 mars 2000  

E-print Network

CR Mission ORENOQUE Venezuela 07 ­ 25 mars 2000 Jean GUILLARD Cette mission est la première de l des zones estuariennes du delta de l'Orénoque ». Une mission exploratoire a été réalisée en octobre 99 afin de préciser les conditions d'échantillonnage (cf. CR Mission oct. 99). Ce programme est une

Guillard, Jean

145

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

PubMed

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

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

2014-01-01

146

CYCLIC STEAM INJECTION IN THE QUIRIQUIRE FIELD OF VENEZUELA  

Microsoft Academic Search

For the past 4 yr, Creole Petroleum Corp. has been actively testing the use of steam as a production stimulant in the Quiriquire Field of Eastern Venezuela. The method being tested is the so-called ''huff-and-puff'' method where steam is injected into the formation and the well later returned to production. This method of stimulation has been used for 8 wells

R. W. Payne; Gabaniel Zambrano

1965-01-01

147

Notomicrus josiahi, a new species of Noteridae (Coleoptera) from Venezuela.  

PubMed

Notomicrus josiahi sp. n. is described from a stream in southern Venezuela. The species differs from others in the genus in 1) large size for the genus (1.48-1.53mm), 2) smooth, shiny dorsal surface with indistinct punctation and mircroretic-ulation, 3) distinct coloration with head and pronotum yellow and elytron bicolored with basal portion black and apical portion brown, and 4) distinctive male genitalia. A checklist of the valid, known species of Notomicrus is given. PMID:24699587

Miller, Kelly B

2013-01-01

148

Seroepidemiology of bovine anaplasmosis and babesiosis in Venezuela  

Microsoft Academic Search

The serological prevalence of bovine anaplasmosis and babesiosis in the Centro-Occidental region of Venezuela was determined using the indirect fluorescent antibody (IFA) and latex agglutination (LAT) tests.Anaplasma marginale IFA and LAT prevalence rates were 57·7 and 48·6% respectively for cattle of all ages and breeds. The respective prevalence of IFA activity toB. bigemina andB. bovis was 78·2 and 38·8%. The

M. A. James; A. Coronado; W. Lopez; R. Melendez; M. Ristic

1985-01-01

149

Venezuela bets on heavy crude for long term  

Microsoft Academic Search

In the heart of eastern Venezuela lies the Orinoco Belt, a vast reserve of heavy crudes and bitumen that equate to only 8° to 10° API. At the beginning of the 1920s, a number of foreign companies explored this area. However, they realized that this crude was too heavy to be produced commercially and abandoned their exploratory sites. In 1978--1980,

1997-01-01

150

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

PubMed Central

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

Diazgranados, Mauricio; Morillo, Gilberto

2013-01-01

151

Paleoseismology in Venezuela: Objectives, methods, applications, limitations and perspectives  

Microsoft Academic Search

The privileged location of Venezuela along an active interplate deformation belt, despite of being a “so-called” developing country, has led to a long paleoseismic tradition as attested by 45 trench assessments since 1968. Since then, a first 2-trench study was carried out by the American Woodward–Clyde company across the Oca fault at Sinamaica. Since 1980, all further paleoseismic studies have

2005-01-01

152

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

USGS Publications Warehouse

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).

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

1994-01-01

153

Why geography? Geographers study the earth's landscapes,  

E-print Network

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

Sussex, University of

154

Geographic Information Systems Oak Ridge National Laboratory  

E-print Network

Geographic Information Systems Oak Ridge National Laboratory managed by UT-Battelle, LLC for the U to carry out activities in intermodal freight planning and policy making. It uses a routing model to assign

155

Layers of Information: Geographic Information Systems (GIS).  

ERIC Educational Resources Information Center

Describes the Geographic Information System (GIS) which is capable of storing, manipulating, and displaying data allowing students to explore complex relationships through scientific inquiry. Explains applications of GIS in middle school classrooms and includes assessment strategies. (YDS)

Lucking, Robert A.; Christmann, Edwin P.

2003-01-01

156

National Center for Geographic Information and Analysis  

E-print Network

1 NCGIA National Center for Geographic Information and Analysis..............................................................................................................26 How Has the Research Agenda Been Affected?........................................26 What Do We Know Now That is New?.....................................................27 What recommendations would

California at Santa Barbara, University of

157

Interruption of Onchocerca volvulus transmission in Northern Venezuela  

PubMed Central

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

2013-01-01

158

On Metonymy Recognition for Geographic Information Retrieval  

Microsoft Academic Search

Metonymically used location names (toponyms) refer to other, related entities and thus possess a meaning different from their literal, geographic sense. Metonymic uses are to be treated differently to improve the performance of geographic information retrieval (GIR). Statistics on toponym senses show that 75.06% of all location names are used in their literal sense, 17.05% are used metonymically, and 7.89%

Johannes Leveling; Sven Hartrumpf

2007-01-01

159

48 CFR 725.702 - Designation of authorized geographic code.  

Code of Federal Regulations, 2012 CFR

... false Designation of authorized geographic code. 725.702 Section 725.702 Federal Acquisition...725.702 Designation of authorized geographic code. (a) The authorized geographic code or codes for an USAID contract shall be...

2012-10-01

160

48 CFR 725.702 - Designation of authorized geographic code.  

Code of Federal Regulations, 2010 CFR

... false Designation of authorized geographic code. 725.702 Section 725.702 Federal Acquisition...725.702 Designation of authorized geographic code. (a) The authorized geographic code or codes for an USAID contract shall be...

2010-10-01

161

48 CFR 725.702 - Designation of authorized geographic code.  

Code of Federal Regulations, 2013 CFR

... false Designation of authorized geographic code. 725.702 Section 725.702 Federal Acquisition...725.702 Designation of authorized geographic code. (a) The authorized geographic code or codes for an USAID contract shall be...

2013-10-01

162

48 CFR 725.702 - Designation of authorized geographic code.  

Code of Federal Regulations, 2011 CFR

... false Designation of authorized geographic code. 725.702 Section 725.702 Federal Acquisition...725.702 Designation of authorized geographic code. (a) The authorized geographic code or codes for an USAID contract shall be...

2011-10-01

163

47 CFR 95.823 - Geographic partitioning and spectrum disaggregation.  

Code of Federal Regulations, 2011 CFR

... 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...

2011-10-01

164

47 CFR 95.823 - Geographic partitioning and spectrum disaggregation.  

Code of Federal Regulations, 2010 CFR

... 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...

2010-10-01

165

Arousing geographic awareness by exposing students to local global connections  

E-print Network

and locations to play games such as Trivial Pursuit. Recently, a concerted effort has been made by many geographers and educators to change this mind-set. Organizations such as the National Geographical Society, Association of American Geographers...

Benjamin, Jerry Lee

2012-06-07

166

The Geographic Scale of Metropolitan Racial Segregation  

PubMed Central

This article addresses an aspect of racial residential segregation that has been largely ignored in prior work: the issue of geographic scale. In some metropolitan areas, racial groups are segregated over large regions, with predominately white regions, predominately black regions, and so on, whereas in other areas, the separation of racial groups occurs over much shorter distances. Here we develop an approach—featuring the segregation profile and the corresponding macro/micro segregation ratio—that offers a scale-sensitive alternative to standard methodological practice for describing segregation. Using this approach, we measure and describe the geographic scale of racial segregation in the 40 largest U.S. metropolitan areas in 2000. We find considerable heterogeneity in the geographic scale of segregation patterns across both metropolitan areas and racial groups, a heterogeneity that is not evident using conventional “aspatial” segregation measures. Moreover, because the geographic scale of segregation is only modestly correlated with the level of segregation in our sample, we argue that geographic scale represents a distinct dimension of residential segregation. We conclude with a brief discussion of the implications of our findings for investigating the patterns, causes, and consequences of residential segregation at different geographic scales. PMID:18939658

REARDON, SEAN F.; MATTHEWS, STEPHEN A.; O'SULLIVAN, DAVID; LEE, BARRETT A.; FIREBAUGH, GLENN; FARRELL, CHAD R.; BISCHOFF, KENDRA

2008-01-01

167

Characterization of enzootic foci of Venezuelan equine encephalitis virus in western Venezuela.  

PubMed

The distribution of the sylvatic subtype ID Venezuelan equine encephalitis (VEE) viruses in the lowland tropical forests of western Venezuela was investigated using remote sensing and geographic information system technologies. Landsat 5 Thematic Mapper satellite imagery was used to study the reflectance patterns of VEE endemic foci and to identify other locations with similar reflectance patterns. Enzootic VEE virus variants isolated during this study are the closest genetic relatives of the epizootic viruses that emerged in western Venezuela during 1992-1993. VEE virus surveillance was conducted by exposing sentinel hamsters to mosquito bites and trapping wild vertebrates in seven forests identified and located by means of the satellite image. We isolated VEE viruses from 48 of a total of 1,363 sentinel hamsters in two of the forests on six occasions, in both dry and wet seasons. None of the 12 small vertebrates captured in 8,190 trap-nights showed signs of previous VEE virus infection. The satellite image was classified into 13 validated classes of land use/vegetation using unsupervised and supervised techniques. Data derived from the image consisted of the raw digital values of near- and mid-infrared bands 4, 5, and 7, derived Tasseled Cap indices of wetness, greenness, and brightness, and the Normalized Difference Vegetation Index. Digitized maps provided ancillary data of elevation and soil geomorphology. Image enhancement was applied using Principal Component Analysis. A digital layer of roads together with georeferenced images was used to locate the study sites. A cluster analysis using the above data revealed two main groups of dense forests separated by spectral properties, altitude, and soil geomorphology. Virus was isolated more frequently from the forest type identified on flat flood plains of main rivers rather than the forest type found on the rolling hills of the study area. The spatial analysis suggests that mosquitoes carrying the enzootic viruses would reach 82-97% of the total land area by flying only 1-3 km from forests. We hypothesize that humans within that area are at risk of severe disease caused by enzootic ID VEE viruses. By contrast, equines could actually become naturally vaccinated, thus preventing the local emergence of epizootic IC VEE virus strains and protecting humans indirectly. PMID:12653150

Barrera, R; Torres, N; Freier, J E; Navarro, J C; García, C Z; Salas, R; Vasquez, C; Weaver, S C

2001-01-01

168

3. Historic American Buildings Survey Photocopy, National Geographic Society Photograph, ...  

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

3. Historic American Buildings Survey Photocopy, National Geographic Society Photograph, 1971 Courtesy, National Geographic Society LIBRARY, 1971 - Townsend House, 2121 Massachusetts Avenue Northwest, Washington, District of Columbia, DC

169

An intelligent method for geographic Web search  

NASA Astrophysics Data System (ADS)

While the electronically available information in the World-Wide Web is explosively growing and thus increasing, the difficulty to find relevant information is also increasing for search engine user. In this paper we discuss how to constrain web queries geographically. A number of search queries are associated with geographical locations, either explicitly or implicitly. Accurately and effectively detecting the locations where search queries are truly about has huge potential impact on increasing search relevance, bringing better targeted search results, and improving search user satisfaction. Our approach focus on both in the way geographic information is extracted from the web and, as far as we can tell, in the way it is integrated into query processing. This paper gives an overview of a spatially aware search engine for semantic querying of web document. It also illustrates algorithms for extracting location from web documents and query requests using the location ontologies to encode and reason about formal semantics of geographic web search. Based on a real-world scenario of tourism guide search, the application of our approach shows that the geographic information retrieval can be efficiently supported.

Mei, Kun; Yuan, Ying

2008-10-01

170

Present Status of Historical Seismicity Studies in Colombia and Venezuela  

NASA Astrophysics Data System (ADS)

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.

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

2013-05-01

171

An investigation of rainfall variability and distribution in Venezuela  

E-print Network

monthly rainfall for selected stations along the coast of Venezuela. 34 20. Change in monthly precipitation bet~san January and February expressed as a percentage of the annual tc tal. 42 21. Change in monthly precipitation bet~san February and March... expressed as a percentage of the annual total. 43 22. Change in monthly precipitation between March and April expressed as a percenmage of the annual total. Change in monthly precipitation bet~san April and !May expressed as a percentage of the annual...

Gibson, Donald Reid

2012-06-07

172

Venezuela No. 1 oil import source in S. America  

SciTech Connect

This paper reports that with the exception of Venezuela, the U.S. is likely to import much oil from South American countries through 2010, the General Accounting Office reports. GAO, a congressional watchdog agency, noted the U.S. imports about 4% of its oil from Colombia, Ecuador, and Trinidad and Tobago and possibly could import from Argentina, Bolivia, Brazil, Chile, and Peru in the future. It the the eight countries' crude oil reserves are expected to increase about 30% by 2000, then slide about 2% by 2010. Their oil production is expected to climb about 21% over 1990 by 2000, then level off until 2010.

Not Available

1992-08-10

173

Mapping the geographical diffusion of new words  

E-print Network

Language in social media is rich with linguistic innovations, most strikingly in the new words and spellings that constantly enter the lexicon. Despite assertions about the power of social media to connect people across the world, we find that many of these neologisms are restricted to geographically compact areas. Even for words that become ubiquituous, their growth in popularity is often geographical, spreading from city to city. Thus, social media text offers a unique opportunity to study the diffusion of lexical change. In this paper, we show how an autoregressive model of word frequencies in social media can be used to induce a network of linguistic influence between American cities. By comparing the induced network with the geographical and demographic characteristics of each city, we can measure the factors that drive the spread of lexical innovation.

Eisenstein, Jacob; Smith, Noah A; Xing, Eric P

2012-01-01

174

Money circulation networks reveal emerging geographical communities  

NASA Astrophysics Data System (ADS)

Geographical communities and their boundaries are key determinants of various spatially extended dynamical phenomena. Examples are migration dynamics of species, the spread of infectious diseases, bioinvasive processes, and the spatial evolution of language. We address the question to what extend multiscale human transportation networks encode geographical community structures, how they differ from geopolitical classifications, whether they are spatially coherent, and analyse their structure as a function of length scale. Our analysis is based on a proxy network for human transportation obtained from the geographic circulation of more than 10 million dollar bills in the United States recorded at the bill tracking website www.wheresgeorge.com. The data extends that of a previous study (Brockmann et al., Nature 2006) on the discovery of scaling laws of human travel by an order of magnitude and permits an approach to multiscale human transportation from a network perspective.

Brockmann, D.; Theis, F.; David, V.

2008-03-01

175

Geographic variation in marine turtle fibropapillomatosis.  

PubMed

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

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

176

Geographic variation in marine turtle fibropapillomatosis  

USGS Publications Warehouse

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.

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

177

National Geographic GeoBee Challenge  

NSDL National Science Digital Library

This site is associated with the National Geographic Society's (NGS) Geographic Bee, an annual national competition where students answer a wide variety of geography related questions. To encourage learning along these same lines, the GeoBee Challenge is a brief online quiz of five geography related questions similar to the ones in the "real Bee." The intent is to promote geography learning and provide a fun method for teachers to include the subject into the classroom. The material has been prepared by the National Geographical Society and is appropriate for grades 4-8. Any question answered incorrectly is noted, and students are encouraged to try again. New questions are posted every day with the 3 previous quizzes also available. Fun, challenging stuff. This site is also reviewed in the July 12, 2002 Scout Report.

1998-01-01

178

Collaborative Virtual Geographic Environment: concepts, features and construction  

Microsoft Academic Search

Virtual Geographic Environment (VGE), or Geographic Virtual Environment (GeoVE) is considered to have the potential to extend the power of geographic information visualization methods. As the increasing development of computer network and Internet technologies, Distributed VGE (DVGE) has been developed to support multi-users to participate and share the same virtual geographic workspace. Nowadays, more and more tasks require group work,

Mingyao Qi; Tianhe Chi; Xin Zhang; Jingxiong Huang

2004-01-01

179

Latent Geographic Feature Extraction from Social Media Christian Sengstock  

E-print Network

Latent Geographic Feature Extraction from Social Media Christian Sengstock Institute of Computer social media. A geographic feature represents a semantic dimension of a location and can be seen of informative geographic features from social media, to describe and explore geographic space

Gertz, Michael

180

Conceptual Framework for Geographic Knowledge Management Pr. Robert Laurini  

E-print Network

Conceptual Framework for Geographic Knowledge Management 1 Pr. Robert Laurini Territorial planning · Based on ­ geographic data ­ knowledge management ­ visual analytics ­ best practice modeling geographic relations #12;Conceptual Framework for Geographic Knowledge Management 2 Pr. Robert Laurini

Laurini, Robert

181

On greedy geographic routing algorithms in sensing-covered networks  

Microsoft Academic Search

Greedy geographic routing is attractive in wireless sensor networks due to its efficiency and scalability. However, greedy geographic routing may incur long routing paths or even fail due to routing voids on random network topologies. We study greedy geographic routing in an important class of wireless sensor networks that provide sensing coverage over a geographic area (e.g., surveillance or object

Guoliang Xing; Chenyang Lu; Robert Pless; Qingfeng Huang

2004-01-01

182

Efficient query processing in geographic web search engines  

Microsoft Academic Search

Geographic web search engines allow users to constrain and or- der search results in an intuitive manner by focusing a query on a particular geographic region. Geographic search technology, also called local search, has recently received significant interest from major search engine companies. Academic research in this area has focused primarily on techniques for extracting geographic knowl- edge from the

Yen-yu Chen; Torsten Suel; Alexander Markowetz

2006-01-01

183

A legend-driven geographic symbol recognition system  

Microsoft Academic Search

A system is presented that utilizes the symbolic knowledge found in the legend of the map to drive geographic symbol recognition. The geographic symbol layer(s) of the map are first scanned. The legend of the map is located and segmented. The geographic symbols are identified and their semantic meaning is attached to them. The geographical symbols in input maps are

Hanan Samet; Aya Soffer

1994-01-01

184

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 âÂÂteachers, 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.

2009-09-22

185

Geographical variation in Plasmodium vivax relapse  

PubMed Central

Background Plasmodium vivax has the widest geographic distribution of the human malaria parasites and nearly 2.5 billion people live at risk of infection. The control of P. vivax in individuals and populations is complicated by its ability to relapse weeks to months after initial infection. Strains of P. vivax from different geographical areas are thought to exhibit varied relapse timings. In tropical regions strains relapse quickly (three to six weeks), whereas those in temperate regions do so more slowly (six to twelve months), but no comprehensive assessment of evidence has been conducted. Here observed patterns of relapse periodicity are used to generate predictions of relapse incidence within geographic regions representative of varying parasite transmission. Methods A global review of reports of P. vivax relapse in patients not treated with a radical cure was conducted. Records of time to first P. vivax relapse were positioned by geographic origin relative to expert opinion regions of relapse behaviour and epidemiological zones. Mixed-effects meta-analysis was conducted to determine which geographic classification best described the data, such that a description of the pattern of relapse periodicity within each region could be described. Model outputs of incidence and mean time to relapse were mapped to illustrate the global variation in relapse. Results Differences in relapse periodicity were best described by a historical geographic classification system used to describe malaria transmission zones based on areas sharing zoological and ecological features. Maps of incidence and time to relapse showed high relapse frequency to be predominant in tropical regions and prolonged relapse in temperate areas. Conclusions The results indicate that relapse periodicity varies systematically by geographic region and are categorized by nine global regions characterized by similar malaria transmission dynamics. This indicates that relapse may be an adaptation evolved to exploit seasonal changes in vector survival and therefore optimize transmission. Geographic patterns in P. vivax relapse are important to clinicians treating individual infections, epidemiologists trying to infer P. vivax burden, and public health officials trying to control and eliminate the disease in human populations. PMID:24731298

2014-01-01

186

Geographic information system/watershed model interface  

USGS Publications Warehouse

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.

Fisher, Gary, T.

1989-01-01

187

Location of geographical objects in crisis situations  

NASA Astrophysics Data System (ADS)

This article summarizes the various expressions of object positioning using different coordinate data and different methods, such as use of maps, exploiting the properties of digital Global System for Mobile Communications (GSM) networks, Global Navigational Satellite Systems (GNSS), Inertial Navigation Systems (INS), Inertial Measurement Systems (IMS), hybrid methods and non-contact (remote sensing) methods; all with varying level of accuracy. Furthermore, the article describes some geographical identifiers and verbal means to describe location of geographical objects such as settlements, rivers, forest, roads, etc. All of the location methods have some advantages and disadvantages, especially in emergency situations, when usually the crisis management has a lack of time in a decision process.

Rybansky, M.; Kratochvil, V.

2014-02-01

188

Paralytic shellfish poisoning (PSP) in Margarita Island, Venezuela.  

PubMed

A severe outbreak of Paralytic Shellfish Poisoning (PSP) occurred in Manzanillo and Guayacán, northwestern coast of Margarita Island, Venezuela, between August and October 1991. A bloom of dinoflagellates including Prorocentrum gracile, Gymnodinium catenatum and Alexandrium tamarense seemed to be responsible for this outbreak. Levels of PSP toxins in mussels (Perna perna) exceeded the international safety limit of saxitoxin, 80 microg STX/100 microg meat. PSP toxin values varied between 2548 and 115 microg STX/100 g meat in Manzanillo, and between 1422 and 86 microg STX/100 g meat in Guayacán. At both locations, the highest levels were detected in August, when 24 patients exhibited typical symptoms of PSP toxicity after consuming cooked mussels (16 required hospitalization). A high pressure liquid chromatographic (HPLC) procedure was recently used on the 1991 samples. The major toxin detected in samples of both locations was decarbamoyl saxitoxin (dcSTX), but low concentrations of saxitoxin were also found in Manzanillo samples. Gonyautoxins GTX1, GTX2 and GTX3 were detected only at Guayacán, while in both locations, decarbamoylgonyatouxin (dcGTX2,3) toxins were detected. These findings represent the first time that causative toxins of PSP in Venezuela have been chemically identified, and confirm the presence of dcSTX and dcGTX in mussels from the Caribbean Sea. The presence of dcSTX and dcGTX in shellfish is indicative that Gymnodinium catenatum was a causative organism for outbreak of PSP. PMID:17465121

La Barbera-Sánchez, Amelia; Franco Soler, Jose; Rojas de Astudillo, Luisa; Chang-Yen, Ivan

2004-09-01

189

Nitrogen isotope dynamics of the Cariaco Basin, Venezuela Robert C. Thunell,1  

E-print Network

Nitrogen isotope dynamics of the Cariaco Basin, Venezuela Robert C. Thunell,1 Daniel M. Sigman,2: Cariaco Basin, denitrification, nitrogen isotopes Citation: Thunell, R. C., D. M. Sigman, F. Muller-Karger, Y. Astor, and R. Varela (2004), Nitrogen isotope dynamics of the Cariaco Basin, Venezuela, Global

Sigman, Daniel M.

190

Estado nutricional en niños preescolares que asisten a un jardín de infancia público en Valencia, Venezuela  

Microsoft Academic Search

SUMMARY. Nutritional status in preschoolers attending a public day-care center in Valencia, Venezuela. With the purpose of evaluating nutritional status in a group of preschoolers attending a public day care center in Valencia, Venezuela (2002), a research was made for social stratus, anthropometric variables; weight, height and arm circumference, hemoglobin, seric retinol, presence of parasitosis and food consumption, as well

Sara Irene del Real; Armando Sánchez Jaeger; María Adela Barón; Nayka Díaz; Liseti Solano; Emma Velásquez; Jesús López

191

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

Microsoft Academic Search

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

AHMET UNVER; MIRIAM PEREZ; NELSON ORELLANA; HAIBIN HUANG; YASUKO RIKIHISA; Departmento de Medicina Cirugia

2001-01-01

192

PENNSYLVANIA GEOGRAPHIC INFORMATION SYSTEM LIBRARY: STATE GAMELAND  

EPA Science Inventory

Pennsylvania Geographic Information System (GIS) Library provides a data set of state gameland boundaries digitized from 1:24,000 USGS topographic maps and verified from Pennsylvania Fish and Game Department information. Coverage is incomplete, certain areas are not mapped when ...

193

Generalized Geographic Mapping System for Computer Graphics.  

National Technical Information Service (NTIS)

The Generalized Geographic Mapping System (GGMS) is a computer program that draws accurately proportioned maps virtually anywhere in the world, using a variety of land mass data bases. The GGMS is written in standard FORTRAN IV and is machine-independent ...

D. B. Koi

1985-01-01

194

The National Geographic Channel -Enhancing the Experience  

E-print Network

supported 'Chasing Time', a 13-part reality travel quiz show. Players answer a question about each of 13The National Geographic Channel - Enhancing the Experience Jenni Lloyd Interactive TV Producer 27) is a world leading digital TV channel, offering viewers the best in intelligent, factual entertainment

Masthoff, Judith

195

Photographical determination of the geographical position.  

NASA Astrophysics Data System (ADS)

The principles of determination of the geographical position, connections of tangential and equatorial coordinates and approximate determination of the zenith are presented in this paper. The block scheme of iterative method of determination of the natural coordinates is given too. (This paper is a short excerpt from diploma work at Department of Geodesy, University of Belgrade).

Zaki?, N.

196

A digital library for geographically referenced materials  

Microsoft Academic Search

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

Terence R. Smith

1996-01-01

197

The Geographic Distribution of Indochinese Refugees.  

ERIC Educational Resources Information Center

This paper presents information regarding the geographic distribution of Indochinese refugees in the United States and how it compares to that of the overall U.S. population and the non-refugee legal immigrant population. The following information is reported: Seventy percent of all Indochinese refugees currently reside in 10 States, with…

Forbes, Susan

198

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

199

Small business growth through geographic expansion  

Microsoft Academic Search

Although the small business sector as a whole is achieving phenomenal growth, an important concern in the field has been identifying the problems, challenges, and success characteristics associated with the prudent growth of individual firms. A strategy utilized by many small firms to achieve their growth objectives is one of geographic expansion. This approach involves expanding a firm’s business from

Bruce R. Barringer; Daniel W. Greening

1998-01-01

200

GEOGRAPHIC INFORMATION SCIENCE IN SOUTH AFRICA  

Microsoft Academic Search

There is little doubt that geographical information systems (GIS) are impacting society and the discipline of geography profoundly. The nature and force of these changes are shaping the ways in which society views, values and uses spatial information in decision-making processes. The aim of this paper is to present an overview of the latest developments in GIS, and to assess

H. L. ZIETSMAN

2002-01-01

201

Geometric algorithms for delineating geographic regions  

Microsoft Academic Search

Everyone of us is used to geographical regions like the south of Utrecht, the dutch Randstad, or the mountainous areas of Austria. Some of these regions have crisp, fixed boundaries like Utrecht or Austria. Others, like the dutch Randstad and the Austrian mountains, have no such boundaries and are used in a more loose sense. However, sometimes it is neccessary

I. Reinbacher

2006-01-01

202

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

203

&CHAPTER 12 Geographic and Energy-Aware  

E-print Network

additional control overhead when network topology changes due to mobility or energy conser- ving sleep cycles guaranteed delivery by memorizing information about all ongoing routing task, memoryless recovery strategies geographical routing strategies and their recovery strategies. 12.1 INTRODUCTION Sensor networks are typically

Stojmenovic, Ivan

204

Finding geographically representative music via social media  

Microsoft Academic Search

People can draw a myriad of semantic associations with music. The semantics can be geographical, ethnographical, society- or time-driven, or simply personal. For certain types of music, however, this semantic association is more prominent and coherent across most peoples. Such music can often serve as an ideal accompaniment for a user activity or setting (that shares the semantics of the

Charles Parker; Dhiraj Joshi; Phoury Lei; Jiebo Luo

2011-01-01

205

Enhancing Geographic Learning and Literacy through Filmmaking  

ERIC Educational Resources Information Center

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…

Dando, Christina E.; Chadwick, Jacob J.

2014-01-01

206

Geographical Study of American Blues Culture  

ERIC Educational Resources Information Center

Music is not often utilized in teaching geography, despite the fact that many scholars orient their research around analyzing both the historical and spatial dimensions of musical expression. This article reports on the use of a teaching module that utilizes blues culture as a lens to understand the geographical history of the United States. The…

Strait, John B.

2010-01-01

207

Teaching Geographic Concepts through Fieldwork and Competition  

ERIC Educational Resources Information Center

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.…

Hupy, Joseph P.

2011-01-01

208

Diversity, Disability, and Geographic Digital Divide  

ERIC Educational Resources Information Center

The phenomenon called digital divide was the focus of this paper. Diversity, disability, and geographical digital divide were relevant to this collaborative project. An extensive review of the literature was conducted for the completion of this project. The evidence for the digital divide in terms of race, level of education, and gender in the…

Sumari, Melati; Carr, Erika; Ndebe-Ngovo, Manjerngie

2006-01-01

209

Mapware: Educational Applications of Geographic Information Systems.  

ERIC Educational Resources Information Center

Analyzes the applicability to mathematics and science education of geographic information systems. Gives examples of possible applications involving aerosol detection in the atmosphere, verification of satellite images, and the Kidnet Project. Sketches out a research agenda and describes needed characteristics of the software when applied to…

Tinker, Robert F.

1992-01-01

210

Geographical Education and Training at Turkish Universities  

ERIC Educational Resources Information Center

In this paper, the history of modern geographical education and training at Turkish universities from 1915 until today is briefly explained. At present, the number of departments of geography adds up to 13 and teacher training departments in geography are seven in total. Information is given about the structure of programmes and subjects selected…

Kocman, Asaf; Sutgibi, Semra

2004-01-01

211

Modeling Geographic Behavior in Riotous Crowds  

Microsoft Academic Search

Under some conditions, tensions among crowd members, harbored a priori or developed on site, might catalyze a crowd to riot, with dramatic consequences. We know perhaps less than we would like to about the processes that drive rioting in crowds because they are difficult to study. In particular, we know relatively little about the influence of geographic behavior on rioting,

Paul M. Torrens; Aaron W. McDaniel

2012-01-01

212

FRIS: An Operational Geographic Information System  

Microsoft Academic Search

One of the most significant aspects of the Forest Resource Information System is not that it is a Geographic Information System with new capabilities, but rather it is in use operationally in a production mode. This system stems from the unique background of government, university, and private industry working together in a jointly sponsored project. Private industry's main interest was

Bill M. Shelley

1981-01-01

213

Distributed geographic information systems in forest management  

Microsoft Academic Search

Managing a forest in the present implies a look towards the future and, in the field of geographic information systems (GIS), it involves the interoperability of existing data and information, which are increasingly determinant in intelligent forest planning and management. Recognizing the global importance of forests in economic, environmental and social dimensions presents a new challenge for those interested in

Andre Barriguinha; Pedro Cabral; Miguel Neto

2011-01-01

214

Towards provenance-aware geographic information systems  

Microsoft Academic Search

GIS (Geographic Information Systems) play an important role to acquire and communicate geospatial knowledge based on spatial data and the use of spatial analysis, modeling, and visualization. The assurance of the validity and quality of spatial data handling and analysis remains a great challenge, in part, because of sophisticated procedures are often required for collaborative geospatial problem-solving and decision making.

Shaowen Wang; Anand Padmanabhan; James D. Myers; Wenwu Tang; Yong Liu

2008-01-01

215

GEOGRAPHIC INFORMATION SYSTEMS AND FACILITY MANAGEMENT  

Microsoft Academic Search

In industry and big organisations facility management has become a managing tool of more and more importance. In times of decreasing profit rates and harder competition every company is forced to develop better strategies for resource and facility management. In this context the questions arise: What is facility management, what offers GIS and how can Geographic Information Systems improve facility

T. Schürle; A. Boy; D. Fritsch

1998-01-01

216

Using Ontologies for Integrated Geographic Information Systems  

Microsoft Academic Search

Today, there is a huge amount of data gathered about the Earth, not only from new spatial information systems, but also from new and more sophisticated data collection technologies. This scenario leads to a number of interesting research challenges, such as how to integrate geographic information of different kinds. The basic motivation of this paper is to introduce a GIS

Frederico T. Fonseca; Max J. Egenhofer; Peggy Agouris; Gilberto Câmara

2002-01-01

217

A New Mathematical Approach to Geographic Profiling  

Microsoft Academic Search

Abstract The primary question in geographic profiling is, given the lo cations of a series of crimes committed by the same serial offender, to estimate the location of that offender’s anchor point. Currently, there are three main approaches to the problem, exemplified by the t hree software systems- CrimeStat, Dragnet, and Rigel. Though the details of the approaches taken by

Mike O'Leary

2009-01-01

218

Arson in Toronto: A geographical perspective (Ontario)  

Microsoft Academic Search

This thesis is an empirical study of the crime of arson in Toronto from a geographical perspective. Although empirical in nature there is a framework of analysis that hopefully provides a starting point for theoretical development. The study is loosely organized around the framework of four areas of arson research which include: antecedent environmental conditions, organismic variables, actual firesetting behavior,

James Richards

1983-01-01

219

A new quality of geographical knowledge  

Microsoft Academic Search

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

A. N. Antipov

2009-01-01

220

NATIONAL CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS  

E-print Network

activities have drawn attention to the existence of the Center, both in the US and abroad. Finally.1 million a year for five years. The first year's operation officially began December 1, 1988, with funding base structures; artificial intelligence and expert systems relevant to the development of geographic

California at Santa Barbara, University of

221

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

PubMed Central

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

Beyea, J

1999-01-01

222

Postepizootic Persistence of Venezuelan Equine Encephalitis Virus, Venezuela  

PubMed Central

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

Navarro, Juan-Carlos; Medina, Gladys; Vasquez, Clovis; Coffey, Lark L.; Wang, Eryu; Suarez, Alexander; Biord, Hernan; Salas, Marlene

2005-01-01

223

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

PubMed

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

Gulbas, Lauren E

2013-03-01

224

Forecasting the Anomalous Discharge of the Caroní River, Venezuela.  

NASA Astrophysics Data System (ADS)

This study develops methods for the extended-range forecasting of the February-March minimum of water discharge of the Caroní River in eastern Venezuela, a watershed providing more than 70% of the hydroelectric power for the country. The predictors are the Tahiti minus Darwin pressure index and the Caroní discharge, both in the preceding July-August, and serve as input to stepwise multiple regression and neural networking. For regression the training period is 1950-79 and the verification period 1980-98. For neural networking the training period is 1950-75 plus 1976-85, and the verification period is 1986-98. The regression model captures more than a third of the variance of the February-March discharge and of the neural method more than half. The predictors are readily available, and application in real time is being initiated.

Hastenrath, Stefan; Greischar, Lawrence; Colón, Esperanza; Gil, Alfredo

1999-08-01

225

Potential for Great Thrust Earthquakes in NE Colombia & NW Venezuela  

NASA Astrophysics Data System (ADS)

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.

Bilham, R. G.; Mencin, D.

2013-05-01

226

ERBE Geographic Scene and Monthly Snow Data  

NASA Technical Reports Server (NTRS)

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.

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

1997-01-01

227

Geographic Analysis of the Radiation Oncology Workforce  

SciTech Connect

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.

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

228

National Geographic: Stone Skipping Gets Scientific  

NSDL National Science Digital Library

This article in National Geographic tells us how and why the magic angle of 20 degrees allows for the most number of skips when skipping stones. How does the author know this? Well, a French scientist constructed a stone-skipping machine to find out the optimal speed, spin, and angle for the maximum number of bounces. Learn more about the physics of stone skipping in this article.

229

Advanced Data Structure and Geographic Information Systems  

NASA Technical Reports Server (NTRS)

The current state of the art in specified areas of Geographic Information Systems GIS technology is examined. Study of the question of very large, efficient, heterogeneous spatial databases is required in order to explore the potential application of remotely sensed data for studying the long term habitability of the Earth. Research includes a review of spatial data structures and storage, development of operations required by GIS, and preparation of a testbed system to compare Vaster data structure with NASA's Topological Raster Structure.

Peuquet, D. (principal investigator)

1984-01-01

230

HIV care for geographically mobile populations.  

PubMed

The interaction between geographic mobility and risk for human immunodeficiency virus infection is well recognized, but what happens to those same individuals, once infected, as they transition to living with the infection? Does mobility affect their transition into medical care? If so, do mobile and nonmobile populations achieve similar success with antiretroviral treatment? The definition of mobility has changed over the centuries to encompass a complex phenotype including permanent migration, frequent travel, circular migration, and travel to and from treatment centers. The heterogeneity of these definitions leads to discordant findings. Investigations show that mobility has an impact on infection risk, but fewer data exist on the impact of geographic mobility on medical care and treatment outcomes. This review will examine existing data regarding the impact of geographic mobility on access to and maintenance in medical care and on adherence to antiretroviral therapy for those living with human immunodeficiency virus infection. It will also expand the concept of mobility to include data on the impact of the distance from residence to clinic on medical care and treatment adherence. Our conclusions are that the existing literature is limited by varying definitions of mobility and the inherent oversimplification necessary to apply a "mobility measure" in a statistical analysis. The impact of mobility on antiretroviral treatment outcomes deserves further exploration to both define the phenomenon and target interventions to these at-risk populations. PMID:21598261

Taylor, Barbara S; Garduño, L Sergio; Reyes, Emily V; Valiño, Raziel; Rojas, Rita; Donastorg, Yeycy; Brudney, Karen; Hirsch, Jennifer

2011-01-01

231

Geographical Gerontology: the constitution of a discipline.  

PubMed

Health and healthcare have always been central considerations in geographical gerontology. This paper reviews progress in this part of the field over the past decade (1995-2006) and also looks to the future. It demonstrates how geographical gerontology is currently constituted of multiple fields of empirical interest studied by multiple academic disciplines. Specifically, the continuation and development of traditional perspectives on older population health--in terms of dynamics, distributions and movements--are traced, as well as emerging post-modern perspectives and qualitative approaches that sensitively investigate the complex relationships between older people and the varied places within which they live and are cared for. Mirroring theoretical developments and diversity in the social sciences, the future research challenges that lie ahead will involve the articulation of varied and often hidden cultural practices and social processes, and hitherto taken-for-granted--as well as new--social and spatial relations, between older people, health and place. If however geographical gerontology is to meet these challenges most effectively, there has to be greater collaboration and communication within and between its constituent disciplines and diverse empirical areas. This will help it become recognized to a greater degree as a distinct discipline. PMID:17459544

Andrews, Gavin J; Cutchin, Malcolm; McCracken, Kevin; Phillips, David R; Wiles, Janine

2007-07-01

232

Geographic and cartographic contexts in generalization  

E-print Network

Apart from the cultural differences, the common expectation from national mapping agencies (NMAs) is to have a fully equipped GIS system that can help them manage and accomplish multiple scale map production with as much automation and flexibility as possible. The popular aim of the NMAs is to build a large-scale digital landscape model (DLM), from which medium- or small-scale DLMs are to be derived. The digital cartographic models (DCMs) are then to be compiled from the correspondent DLMs. Generalization is at the heart of such a production strategy. The challenge in developing generalization solutions roots from the complexity of generalization tasks itself – no features should be generalized in isolation. This paper discusses the geographic and cartographic aspects of contextual generalization, that is, generalizing features that are related and interfere with each other. Wherever possible, our development experience and solutions will be illustrated. In both database and cartographic generalization, feature spatial relationships and geographical patterns are the main consideration of the geographic context, while in cartographic generalization symbolization and clarity govern the cartographic context.

Dan Lee

2004-01-01

233

Geographical assemblages of European raptors and owls  

NASA Astrophysics Data System (ADS)

In this work we look for geographical structure patterns in European raptors (Order: Falconiformes) and owls (Order: Strigiformes). For this purpose we have conducted our research using freely available tools such as statistical software and databases. To perform the study, presence-absence data for the European raptors and owl species (Class Aves) were downloaded from the BirdLife International website. Using the freely available "pvclust" R-package, we applied similarity Jaccard index and cluster analysis in order to delineate biogeographical relationships for European countries. According to the cluster of similarity, we found that Europe is structured into two main geographical assemblages. The larger length branch separated two main groups: one containing Iceland, Greenland and the countries of central, northern and northwestern Europe, and the other group including the countries of eastern, southern and southwestern Europe. Both groups are divided into two main subgroups. According to our results, the European raptors and owls could be considered structured into four meta-communities well delimited by suture zones defined by Remington (1968) [Remington, C.L., 1968. Suture-zones of hybrid interaction between recently joined biotas. Evol. Biol. 2, 321-428]. Climatic oscillations during the Quaternary Ice Ages could explain at least in part the modern geographical distribution of the group.

López-López, Pascual; Benavent-Corai, José; García-Ripollés, Clara

2008-09-01

234

commentary: The geographic consequences of climate change for migratory birds  

E-print Network

tion of the consequences of climate change for biodiversity.The geographic consequences of climate change for migratoryclimate change, there has been an expanding modeling effort to project the long-term geographical consequences.

La Sorte, Frank A.

2009-01-01

235

Species' geographic distributions through time: Playing catchup with changing climates  

E-print Network

. Columbeau. 2008. Reconstructing ecological niches and geographic distributions of caribou (Rangifer tarandus) and red Peterson, A. T., and B. S. Lieberman. 2012. Species' geographic distributions through time: Playing catchup with changing climates...

Peterson, A. Townsend; Lieberman, Bruce S.

2012-03-02

236

47 CFR 27.15 - Geographic partitioning and spectrum disaggregation.  

Code of Federal Regulations, 2010 CFR

... 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...

2010-10-01

237

47 CFR 27.15 - Geographic partitioning and spectrum disaggregation.  

Code of Federal Regulations, 2011 CFR

... 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...

2011-10-01

238

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

E-print Network

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 ...

O'Leary, Michael Boyer, 1969-

2002-01-01

239

Towards A Unified Framework For Geographical Data Models  

E-print Network

in different cognitive perceptions of the geographical space and that they are extreme, idealised notions from environment. We consider that the computer-based modelling of geographical reality requires a level

Camara, Gilberto

240

47 CFR 22.503 - Paging geographic area authorizations.  

Code of Federal Regulations, 2010 CFR

...Paging geographic area authorizations. The FCC considers applications for and issues...this section. (a) Channels. The FCC may issue a paging geographic area authorization...Department of Commerce's 172 EAs, the FCC shall separately license Guam and the...

2010-10-01

241

A Geographer's Role in a Google Maps World  

E-print Network

1 A Geographer’s role in a Google Maps World Jeremy Bartley ESRI 2 It is a good time to be a Geographer. Microsoft, Google, Yahoo, and others are pushing geographic awareness to the general public Providing Image Basemaps for the World... . . . They are Demonstrating the Reach and Value of the Web Environment For Consumer Focused Geospatial Visualization and Mashups Their Vision is to Georeference All Content on the Web . . . One More Aspect of Search Google and Microsoft provide good implementation...

Bartley, Jeremy

2007-11-14

242

Finding Home: Challenges Faced by Geographically Mobile Families  

ERIC Educational Resources Information Center

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…

Allen, Sarah

2008-01-01

243

Geographical Diversification, Risk and Firm Performance of US Casinos  

Microsoft Academic Search

Although geographical diversification is an emerging issue and has been considered a key competitive strategy in the casino industry, an examination of the effects of geographical diversification on casino firms’ risks and firm performances has been sparse. Thus, this study investigates the impact of the degree of geographical diversification on risk measured by the standard deviation of daily stock returns

Kyung Ho Kang; Seoki Lee; Kyuwan Choi; Kyuseok Lee

2011-01-01

244

Geographical Diversification, Risk and Firm Performance of US Casinos  

Microsoft Academic Search

Although geographical diversification is an emerging issue and has been considered a key competitive strategy in the casino industry, an examination of the effects of geographical diversification on casino firms’ risks and firm performances has been sparse. Thus, this study investigates the impact of the degree of geographical diversification on risk measured by the standard deviation of daily stock returns

Kyung Ho Kang; Seoki Lee; Kyuwan Choi; Kyuseok Lee

2012-01-01

245

The geographic selection mosaic for squirrels, crossbills and Aleppo pine  

Microsoft Academic Search

The interactions between many species are structured in a geographic mosaic of populations among which selection is divergent. Here we tested the hypothesis that such a geographic selection mosaic arises for common crossbills (Loxia curvirostra) feeding on seeds in the cones of Aleppo pine (Pinus halepensis) because of geographic variation in the occurrence of European red squirrels (Sciurus vulgaris). On

E. T. MEZQUIDA; C. W. BENKMAN

246

Effect of Geographic Distance on Distance Education: An Empirical Study  

ERIC Educational Resources Information Center

This study investigates the effect of geographic distance on students' distance learning experience with the aim to provide tentative answers to a fundamental question--does geographic distance matter in distance education? Using educational outcome data collected from an online master's program in Geographic Information Systems, this…

Luo, Heng; Robinson, Anthony C.; Detwiler, Jim

2014-01-01

247

Impact of Sensing Coverage on Greedy Geographic Routing Algorithms  

Microsoft Academic Search

Greedy geographic routing is an attractive localized routi ng scheme for wireless sensor networks due to its efficiency and scalability. However, gre edy geographic routing may fail due to routing voids on random network topologies. We study greedy geographic routing in an important class of wireless sensor networks (e.g., surveillance or object tracking systems) that provide sensing coverage over a

Guoliang Xing; Chenyang Lu; Robert Pless; Qingfeng Huang

2006-01-01

248

Department of Geographical and Earth Sciences MRes in Human Geography  

E-print Network

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 DEPARTMENT of GEOGRAPHICAL AND EARTH SCIENCES Name: Martin Muir Matriculation Number: 0607860 Course Name

Hammerton, James

249

Building GML-native web-based geographic information systems  

Microsoft Academic Search

Disaster response systems are designed to facilitate decision-making based on large amounts of heterogeneous geographic information. Most geographic information systems (GISs) use relational databases to manipulate information efficiently. However, they suffer from interoperability issues because they need to expend significant effort mapping heterogeneous geographic information, which may have complicated structures, into relational data models, and vice versa. Geography Markup Language

Chia-Hsin Huang; Tyng-Ruey Chuang; Dong-Po Deng; Hahn-Ming Lee

2009-01-01

250

Definition and Manipulation of Graphical Entities in Geographic Information Systems  

Microsoft Academic Search

Geographic information systems have much in common with generalized data base management systems. Both types of systems require the definition of items, attributes, and higher level constructs involving them, e.g. records. Geographic information systems deal in addition with graphical entities, a concept unknown in data base management systems. Not surprisingly, geographic systems have little in common; each one is a

Richard L. Phillips

1979-01-01

251

Reasoning About Spatial Structure in Landscapes with Geographic Information Systems  

Microsoft Academic Search

Geographic Information Systems offer a new means to store, transform, and present cartographic information. Persons involved in landscape ecology, planning, and management use these systems to transform and examine data pertaining to a given geographical region. Unfortunately, there is often little correspondence between the language of landscape analysis and the operations provided by most Geographic Information Systems. This paper describes

Claude W. Saunders

1993-01-01

252

The application of geographic information system in HBV genotype  

Microsoft Academic Search

The geographic information system is an application engineering technology of the management and the analysis spatial data, with gathering, management, processing, and analysis of the spatial data. The geographic information system can be use to solve the complex plan and the management question. Molecular biology rapidly expands causes thorough understanding about HBV. But the research concerning the geographic distribution of

ShuQin Zhu; MiaoHeng Wang

2011-01-01

253

An integrated framework for the geographic surveillance of chronic disease  

Microsoft Academic Search

BACKGROUND: Geographic public health surveillance is concerned with describing and disseminating geographic information about disease and other measures of health to policy makers and the public. While methodological developments in the geographical analysis of disease are numerous, few have been integrated into a framework that also considers the effects of case ascertainment bias on the effectiveness of chronic disease surveillance.

Nikolaos Yiannakoulias; Lawrence W Svenson; Donald P Schopflocher

2009-01-01

254

Efficient Greedy Geographical NonPlanar Routing with Rreactive Deflection  

E-print Network

Efficient Greedy Geographical Non­Planar Routing with Rreactive Deflection Fabrice Theoleyre, Eryk or operators add more routers to increase capacity and coverage. We assume that mesh routers benefit from Geographical Non­Planar Routing with Reactive Deflection 2 Unlike traditional approaches, geographical routing

Recanati, Catherine

255

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

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

2011-01-01

256

Review of the Berosus Leach of Venezuela (Coleoptera, Hydrophilidae, Berosini) with description of fourteen new species  

E-print Network

The species of the water scavenger beetle genus Berosus Leach occurring in Venezuela are reviewed. Thirty-six species are recorded, including fifteen new species, fourteen of which are described here as new: Berosus aragua sp. n., Berosus...

Oliva, Adriana; Short, Andrew E. Z.

2012-07-06

257

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

E-print Network

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...

Deghirmandjian, Odilia

2012-06-07

258

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

SciTech Connect

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.

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

1995-04-01

259

Racial and geographic differences in fish consumption  

PubMed Central

Background: Omega-3 fatty acids from fish have been shown to have favorable effects on platelet aggregation, blood pressure, lipid profile, endothelial function, and ischemic stroke risk, but there are limited data on racial and geographic differences in fish consumption. Methods: Reasons for Geographic and Racial Differences in Stroke (REGARDS) is a national cohort study that recruited 30,239 participants age ?45 years with oversampling from the southeastern Stroke Belt and Buckle and African Americans (AAs). Centralized phone interviewers obtained medical histories and in-home examiners measured weight and height. Dietary data for this cross-sectional analysis were collected using the self-administered Block98 Food Frequency Questionnaire (FFQ). Adequate intake of nonfried fish was defined as consumption of ?2 servings per week based on American Heart Association guidelines. After excluding the top and bottom 1% of total energy intake and individuals who did not answer 85% or more of questions on the FFQ, the analysis included 21,675 participants. Results: Only 5,022 (23%) participants consumed ?2 servings per week of nonfried fish. In multivariable analysis, factors associated with inadequate intake of nonfried fish included living in the Stroke Belt (vs non-Belt) (odds ratio [OR] 0.83, 95% confidence interval [CI] 0.77–0.90) and living in the Stroke Buckle (vs non-Belt) (OR 0.89, 95% CI 0.81–0.98); factors associated with ?2 servings per week of fried fish included being AA (vs white) (OR 3.59, 95% CI 3.19–4.04), living in the Stroke Belt (vs non-Belt) (OR 1.32, 95% CI 1.17–1.50), and living in the Stroke Buckle (vs non-Belt) (OR 1.17, 95% CI 1.00–1.36). Conclusions: Differential consumption of fish may contribute to the racial and geographic disparities in stroke. PMID:21178096

Le, A.; Judd, S.; Frankel, M.R.; Ard, J.; Newby, P.K.; Howard, V.J.

2011-01-01

260

GeoDMA—Geographic Data Mining Analyst  

NASA Astrophysics Data System (ADS)

Remote sensing images obtained by remote sensing are a key source of data for studying large-scale geographic areas. From 2013 onwards, a new generation of land remote sensing satellites from USA, China, Brazil, India and Europe will produce in 1 year as much data as 5 years of the Landsat-7 satellite. Thus, the research community needs new ways to analyze large data sets of remote sensing imagery. To address this need, this paper describes a toolbox for combing land remote sensing image analysis with data mining techniques. Data mining methods are being extensively used for statistical analysis, but up to now have had limited use in remote sensing image interpretation due to the lack of appropriate tools. The toolbox described in this paper is the Geographic Data Mining Analyst (GeoDMA). It has algorithms for segmentation, feature extraction, feature selection, classification, landscape metrics and multi-temporal methods for change detection and analysis. GeoDMA uses decision-tree strategies adapted for spatial data mining. It connects remotely sensed imagery with other geographic data types using access to local or remote database. GeoDMA has methods to assess the accuracy of simulation models, as well as tools for spatio-temporal analysis, including a visualization of time-series that helps users to find patterns in cyclic events. The software includes a new approach for analyzing spatio-temporal data based on polar coordinates transformation. This method creates a set of descriptive features that improves the classification accuracy of multi-temporal image databases. GeoDMA is tightly integrated with TerraView GIS, so its users have access to all traditional GIS features. To demonstrate GeoDMA, we show two case studies on land use and land cover change.

Körting, Thales Sehn; Garcia Fonseca, Leila Maria; Câmara, Gilberto

2013-08-01

261

Digital Mapping and Geographic Information Systems (GIS)  

NSDL National Science Digital Library

Geographic information systems (GIS), once used predominantly by experts in cartography and computer programming, have become pervasive in everyday business and consumer use. This unit explores GIS in general as a technology about which much more can be learned, and it also explores applications of that technology. Students experience GIS technology through the use of Google Earth on the environmental topic of plastics in the ocean in an area known as the Great Pacific Garbage Patch. The use of this topic in GIS makes the unit multidisciplinary, incorporating the physics of ocean currents, the chemistry associated with pollutant degradation and chemical sorption to organic-rich plastics, and ecological impact to aquatic biota.

National Science Foundation GK-12 and Research Experience for Teachers (RET) Programs,

262

National Geographic: SpaceShipOne  

NSDL National Science Digital Library

The National Geographic presents Burt Rutan's accomplishments with his rocketship, SpaceShipOne. Users can learn about the preparation and flight through a series of fascinating images and a concise article. The website features photographer Jim Sugar's experience covering the event. Visitors can find interesting facts and links to outside resources. For those who would like to discuss the topic, individuals can join in the online forum. Everyone should visit the Multimedia link to take a closer look at SpaceShipOne's cockpit.

263

Recent trends in geographic information system research  

NASA Technical Reports Server (NTRS)

This paper reviews recent contributions to the body of published research on Geographic Information Systems (GISs). Increased usages of GISs have placed a new demand upon the academic and research community and despite some lack of formalized definitions, categorizations, terminologies, and standard data structures, the community has risen to the challenge. Examinations of published GIS research, in particular on GIS data structures, reveal a healthy, active research community which is using a truly interdisciplinary approach. Future work will undoubtably lead to a clearer understanding of the problems of handling spatial data, while producing a new generation of highly sophisticated GISs.

Clarke, K. C.

1986-01-01

264

National Geographic Magazine: Saving Africa's Eden  

NSDL National Science Digital Library

This National Geographic Web site contains an online, multimedia supplement to a feature article from the September 2003 issue of the magazine, which takes an in-depth look at the prospect of setting aside an amazing 11% of Gabon's intact wilderness for conservation and ecotourism. The Web site includes an excerpt from the print article, but extra Web features are the real attraction. Visitors will find an online-only photo gallery, field notes from photographer Michael Nichols, and a handful of other cool features like the video clip featuring ecologist Mike Fay as he treks through Gabon's virtually unexplored wilderness.

2003-01-01

265

Geographical information systems and tropical medicine  

PubMed Central

In terms of their applicability to the field of tropical medicine, geographical information systems (GIS) have developed enormously in the last two decades. This article reviews some of the pertinent and representative applications of GIS, including the use of such systems and remote sensing for the mapping of Chagas disease and human helminthiases, the use of GIS in vaccine trials, and the global applications of GIS for health-information management, disease epidemiology, and pandemic planning. The future use of GIS as a decision-making tool and some barriers to the widespread implementation of such systems in developing settings are also discussed. PMID:20659391

KHAN, O. A.; DAVENHALL, W.; ALI, M.; CASTILLO-SALGADO, C.; VAZQUEZ-PROKOPEC, G.; KITRON, U.; SOARES MAGALHAES, R. J.; CLEMENTS, A. C. A.

2013-01-01

266

Six Essential Elements- National Geographic Photograph Activity  

NSDL National Science Digital Library

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.

Steed, Patricia

2012-08-01

267

Forces of Nature: National Geographic Education  

NSDL National Science Digital Library

This dynamic site from National Geographic Education features invigorating ganders into four of natureâÂÂs most devastating forces. Start with Tornadoes. Six sections â What is a Tornado, What Causes Tornadoes, and Characteristics of Tornadoes, among others â provide an informative overview of these sudden, sometimes devastating wind events. Next, take a look at Volcanoes, and click on headings like Where Do Volcanoes Occur? and How Do Volcanoes Erupt? Hurricanes and Earthquakes each deserve careful attention, especially the interactive, Spin Off Your Own Hurricane, where you can learn how hurricanes are made by building one yourself.

268

Four new species of Andean Pilea (Urticaceae), with additional notes on the genus in Venezuela  

PubMed Central

Abstract Four new species of Pilea (Urticaceae) from the Andes of Venezuela are described and illustrated: Pilea matthewii sp. nov., Pilea miguelii sp. nov., Pilea nicholasii sp. nov., and Pilea nidiae sp. nov. The affinities of these species and their positions within the informal classifications of Pilea proposed by Weddell and Killip are discussed. Notes on other species of Pilea found in Venezuela also are presented.

Dorr, Laurence J.; Stergios, Basil

2014-01-01

269

Confronting Health Disparities: Latin American Social Medicine in Venezuela  

PubMed Central

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

Mantini-Briggs, Clara

2009-01-01

270

New Insights into Chloramphenicol Biosynthesis in Streptomyces venezuelae ATCC 10712.  

PubMed

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

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

271

[Characterization of flaxseed (Linum usitatissimum L.) grown in Venezuela].  

PubMed

In recent years, the consumption of flaxseed (Linum usitatissimum L.) has been promoted as a functional food for its health benefits, mainly attributable to its content of omega-3 fatty acids, lignans and dietary fiber. This study evaluated the microbiological quality, chemical composition and antioxidant properties of flaxseed grown in Venezuela and compared them to the values of a Canadian variety widely sold in the country. Total coliforms, molds and yeasts, S. aureus and sporulated of the genera Bacillus (aerobic) and Clostridium (anaerobic), moisture, fat, protein, total dietary fiber, soluble and insoluble, mucilage, minerals, fatty acid profile, equivalent HCN content, aw, color, polyphenols and antioxidant properties, like antiradical efficiency (AE), concentration of antioxidant needed to decrease the initial concentration by 50 %EC50) and the time required to reach the EC50 (TEC50) were evaluated. Significant differences in seed composition were determined, where its high content of fat, protein, alfa-linolenic acid and dietary fiber stand out. Differences were observed in the mucilage content, but not in soluble, insoluble and total fiber content. Equivalent HCN concentration in both seeds is in the order of 40 mg/100 g, which poses no health risks, considering their consumption patterns. Venezuelan flaxseed contains higher content of polyphenols than the Canadian does, but the antioxidant capacity of the latter is higher; both have an EA rated as average and a slow reaction time (TEC50 > 30 min). PMID:23610908

Cuevas, Zoitza Ostojich; Sangronis, Elba

2012-06-01

272

Caribbean basin framework, 4: Maracaibo basin, northwestern Venezuela  

SciTech Connect

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.

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

1991-03-01

273

Enhancing phylogeography by improving geographical information from GenBank.  

PubMed

Phylogeography is a field that focuses on the geographical lineages of species such as vertebrates or viruses. Here, geographical data, such as location of a species or viral host is as important as the sequence information extracted from the species. Together, this information can help illustrate the migration of the species over time within a geographical area, the impact of geography over the evolutionary history, or the expected population of the species within the area. Molecular sequence data from NCBI, specifically GenBank, provide an abundance of available sequence data for phylogeography. However, geographical data is inconsistently represented and sparse across GenBank entries. This can impede analysis and in situations where the geographical information is inferred, and potentially lead to erroneous results. In this paper, we describe the current state of geographical data in GenBank, and illustrate how automated processing techniques such as named entity recognition, can enhance the geographical data available for phylogeographic studies. PMID:21723960

Scotch, Matthew; Sarkar, Indra Neil; Mei, Changjiang; Leaman, Robert; Cheung, Kei-Hoi; Ortiz, Pierina; Singraur, Ashutosh; Gonzalez, Graciela

2011-12-01

274

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

PubMed Central

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

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

2014-01-01

275

Genetic, geographic, and linguistic distances in Europe  

SciTech Connect

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.

Sokal, R.R.

1988-03-01

276

GEODE Initiative: Geographic Data in Education  

NSDL National Science Digital Library

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.

Edelson, Daniel

2008-03-20

277

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

ERIC Educational Resources Information Center

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…

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

2006-01-01

278

Integrating geographic and non-geographic data search services using metadata crosswalks  

Microsoft Academic Search

There are many scenarios that require the combination of different types of metadata. For instance, let us imagine the case of three different metadata-databases describing the elements from a library (books, reports and other kinds of documents), events (movies, theatres, recitals, etc) and geographic data (maps, satellite images, etc) respectively. These databases could be integrated into systems that provide specialized

F. J. Zarazaga-Soria; M. P. Torres; J. Nogueras-Iso; J. Lacasta; O. Cantán

2003-01-01

279

The geographical accessibility of hospitals to the aged: a geographic information systems analysis within Illinois.  

PubMed Central

OBJECTIVE. This article uses geographic information systems and their related tools to empirically measure and display the geographic accessibility of the aged population to hospital facilities within Illinois. DATA SOURCES AND STUDY SETTING. Geographic accessibility of Illinois' aged population is measured from each of the state's 10,796 census block groups to the state's 214 hospital facilities. Block group demographic compositions and centroids are obtained from 1990 census files. Hospital coordinates are obtained by the authors. STUDY DESIGN. Of five alternative measures of accessibility considered, empirical estimates are obtained for two: choice set and minimum distance. Access to both general hospitals and the subset having specialized geriatric facilities is measured with special attention to differences in accessibility between the aged within metropolitan statistical areas (MSAs) and those outside MSAs. Cumulative accessibility distributions and their summary statistics provide a basis of comparison among subgroups. DATA COLLECTION AND EXTRACTION. Geographic information systems (GIS) and their related tools are used as a means of efficiently capturing, organizing, storing, and retrieving the required data. Hospitals and census block groups are geocoded to specific locations in the database, and aspatial attributes are assigned to the hospitals and block groups. The GIS database is queried to produce shaded isarithm and point distribution maps that show the location of hospitals relative to surrounding aged populations. CONCLUSION. The vast majority of Illinois' aged population is within close proximity to hospital facilities. Eighty percent (1,147,504 persons) of the aged in Illinois are within 4.8 miles (7.7 km) of a hospital and 11.6 miles (18.7 km) of two hospitals. However, geographic accessibility differences between the aged living in MSAs and those living outside MSAs to hospitals offering geriatric services are substantial; but there is no evidence that the aged's geographical accessibility to hospitals is less favorable than that of the general population. Detailed accessibility measures permitted by geographic information system technology call into question the continued use of crude empirical accessibility measures. Images Figure 2 PMID:7860317

Love, D; Lindquist, P

1995-01-01

280

American Geographical Society Digital Photo Archive  

NSDL National Science Digital Library

The University of Wisconsin, Milwaukee has rolled out a number of fine digital collections over the past few years that have covered everything from Golda Meir to the Milwaukee Repertory Theater. This latest addition provides access to over 2000 photographs from the American Geographical Society Library (AGSL). The current collection is primarily focused on countries in Asia and the Middle East, and they hope to expand their collection in the near future to include additional regions of the world. Visitors to the site can search the collection by country, city, or search term of their choice. Highlights of the archive include some remarkable photographs of the waterfront in Alexandria, the markets of Bangkok, and photographs of the city of Kathmandu.

281

Geographic Research in the USGS Western Region  

USGS Publications Warehouse

The two geography research programs of the U.S. Geological Survey (USGS), Land Remote Sensing and Geographic Analysis and Monitoring, have very strong relevance to the USGS mission and science strategy. In the western United States, the particular niche of these geography programs is in connecting USGS science to people and communities. Reports from the National Academy of Sciences and other organizations invariably encourage the U.S. Geological Survey (USGS) to ensure the quality of its science while finding ways to make it more relevant to important societal issues. Much of the geography research conducted in the USGS Western Region does exactly that. In Menlo Park, California, the geography research team is focused on developing tools and techniques to help people assess risk from natural hazards and environmental impacts. In Flagstaff and Tucson, Arizona, geography scientists explore new ways to use remote sensing to help communities deal with environmental issues.

Tongue, Mara

2007-01-01

282

National Geographic: WildCam Africa  

NSDL National Science Digital Library

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.

2005-01-01

283

The geographical distribution of Q fever  

PubMed Central

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

Kaplan, Martin M.; Bertagna, P.

1955-01-01

284

Geographic concentration of violence between intimate partners.  

PubMed Central

OBJECTIVES: To explore geographic patterns of violence between intimate partners in a metropolitan area with one of the highest injury mortality rates in the nation-Duval County, Florida, which includes the city of Jacksonville. METHODS: Using police reports of all serious violent incidents in Duval County in 1992 excluding robberies, the authors analyzed patterns in the location of the incidents. Only cases for which the relationship between the offender and victim was recorded were used. RESULTS: Thematic maps reveal that census tracts with rates above the 75th percentile of assaultive violence between intimates are clustered in certain parts of the city. Concentrated poverty tracts had median rates of violence between intimate nine times higher than other tracts. CONCLUSIONS: The finding that violence between intimate partners is concentrated in central city poverty neighborhoods opens up avenues for prevention. PMID:9071275

Miles-Doan, R; Kelly, S

1997-01-01

285

Neogene history of the Carapita Formation, Eastern Venezuela basin  

NASA Astrophysics Data System (ADS)

The planktonic and benthic foraminifera from the lower to middle Miocene shales of the Carapita Formation of Eastern Venezuela in three exploration wells and one outcrop section are analyzed with the objectives of establishing a precise biostratigraphy of the formation and its bathymetric history. Comparison with the well-preserved microfaunas of the correlative Cipero Formation of Trinidad made possible the achievement of these objectives. The formation, up to 4500 to 6000 m thick in outcrops, extends from northeastern Anzoategui and North of Monagas States to the Gulf of Paria and is both an important oil reservoir towards the east and the main seal rock for the Oligocene reservoir in the north of Monagas State. In the area studied the Carapita Formation spans lower to lower middle Miocene Zones N6/M3 to N9/M6; its upper part is unconstrained as only rare long ranging early Miocene to early Pliocene planktonic foraminifera occur above the Orbulina datum. Unexpectedly, we found that the four lower to middle Miocene sections are highly discontinuous, with hiastuses as long as 4 Myr. Based on the abundance patterns of sixty-nine species of benthic foraminifera and analysis of morphotype abundance following the methodology of Corliss and Chen (1988) and Corliss and Fois (1993), we show that the Carapita Formation was deposited at outer neritic to middle bathyal depths (?200--1000 m), whereas the Cipero Formation was deposited at middle to lower bathyal depths (?600--2000 m). Importantly, the bathymetric changes are associated with unconformities in all sections, strongly suggesting that both (shallowing and associated unconformities) were tectonically induced.

Sanchez Zambrano, Dennis Alberto

286

Tectonothermal modeling of hydrocarbon maturation, Central Maracaibo Basin, Venezuela  

SciTech Connect

The petroliferous Maracaibo Basin of northwestern Venezuela and extreme eastern Colombia has evolved through a complex geologic history. Deciphering the tectonic and thermal evolution is essential in the prediction of hydrocarbon maturation (timing) within the basin. Individual wells in two areas of the central basin, Blocks III and V, have been modeled to predict timing of hydrocarbon generation within the source Upper Cretaceous La Luna Formation, as well as within interbedded shales of the Lower-Middle Eocene Misoa Formation reservoir sandstones. Tectonic evolution, including burial and uplift (erosional) history, has been constrained with available well data. The initial extensional thermal regime of the basin has been approximated with a Mackenzie-type thermal model, and the following compressional stage of basin development by applying a foreland basin model. Corrected Bottom Hole Temperature (BHT) measurements; from wells in the central basin, along with thermal conductivity measurements of rock samples from the entire sedimentary sequence, resulted in the estimation of present day heat flow. An understanding of the basin`s heat flow, then, allowed extrapolation of geothermal gradients through time. The relation of geothermal gradients and overpressure within the Upper Cretaceous hydrocarbon-generating La Luna Formation and thick Colon Formation shales was also taken into account. Maturation modeling by both the conventional Time-Temperature Index (TTI) and kinetic Transformation Ratio (TR) methods predicts the timing of hydrocarbon maturation in the potential source units of these two wells. These modeling results are constrained by vitrinite reflectance and illite/smectite clay dehydration data, and show general agreement. These results also have importance regarding the timing of structural formation and hydrocarbon migration into Misoa reservoirs.

Manske, M.C. [OMNI Laboratories, Inc., Maracaibo (Venezuela)

1996-08-01

287

Lithospheric scale model of Merida Andes, Venezuela (GIAME Project)  

NASA Astrophysics Data System (ADS)

Merida Andes (MA) is one of the most important orogenic belt in Venezuela and represents the northern culmination of South America Andes. During the last 60 years, several models have been proposed to explain the shallow and deep structure, using different geological, geophysical, seismological, geochemical and petrologic concepts; nevertheless, most of them have applied local observation windows, and do not represent the major structure of MA. Therefore, a multidisciplinary research group, coordinated by FUNVISIS, in close cooperation with UCV, ULA and PDVSA, is proposed in order to get the outlined goals in the project entitled GIAME ("Geociencia Integral de los Andes de MErida") was established, which aims to generate a lithospheric scale model and the development of a temporal dynamic model for the MA. As a base for lithospheric investigations of the Merida Andes, we are proposing three wide angle seismic profiles across the orogen on three representative sites, in order to determine the inner structure and its relation with the orogen's gravimetric root. To the date, there are no seismic studies at lithospheric scale which cross MA. The wide angle seismic will be complemented with the re-processing and re-interpretation of existing reflection seismic data, which will allow to establish a relationship between MA and its associated flexural basins (Maracaibo and Barinas-Apure basins). Depending on the results of the VENCORP Project (VENezuelan COntinental Reflection Profiling), which might show some reliable results about crustal features and Moho reflectors along three long seismic profiles at Caribbean Moutain system, a reflection seismic profile across the central portion of MA is proposed. Additional tasks, consisting in MA quaternary deformation studies, using research methods like neotectonics and paleoseismology, georadar, numerical modeling, cinematic GPS, SAR interferometry, thermocronology, detailed studies on regional geology, flexural modeling, gravity modeling, among others, will be carried out. We expect this project is going to help to solve many of the doubts regarding the origin, evolution and structural configuration of the Merida Andes.

Schmitz, M.; Orihuela, N. D.; Klarica, S.; Gil, E.; Levander, A.; Audemard, F. A.; Mazuera, F.; Avila, J.

2013-05-01

288

Encounters with Science at ULA, Venezuela: An Incentive for Learning  

NASA Astrophysics Data System (ADS)

In the School of Science of the Universidad de Los Andes (ULA), in Mérida, Venezuela, a very successful event focused on high school students and primary school students, was founded in 2000. The name of this event is "Encounters with Physics, Chemistry, Mathematics, and Biology" (hereinafter "Encounters with Science"), and it integrates these disciplines as well as Astronomy. Its main purpose is that young minds can become familiar with the methods of science inquiry and reasoning, and can understand the concepts and processes of the sciences through thoroughly prepared experiences. This flourishing program is continuing to grow and to become strong. As a matter of fact, in its sixth edition (2005), the number of high and elementary school students coming from all over the country, has reached the outstanding number of nine thousand. Among all the experiences that the students could be engaged in were many involving Astronomy. These experiences were prepared by professors, together with graduate and undergraduate students, who are pursuing their degrees in all branches of science including astronomy. Although there is this incredible team of faculties and graduate and undergraduate students working together; the target is the students of the high and elementary schools. We certainly focus on the engaging and encouraging of students to experience scientific work first hand. Additionally, our professors have prepared an excellent didactic material that can, together with the hour/class teaching, prepare high school and elementary school students for a better understanding of science; particularly, helping in this way for a better education in Astronomy. The main event of the Encounters lasts five days in the School of Science of ULA, but subsidiary events are spread all over the year and around the country. As a successful program, it can be interesting to see if other countries can adopt this method to recruit or to trigger the interest of students to pursue their studies in the Sciences.

Rosenzweig, P.

2006-08-01

289

A study of beef cattle marketing in Venezuela and the marketing margins between the farm and retail levels of prices  

E-print Network

. . . . . Organization of the Venezuela Beef Marketing System. 36 43 Cattle collection. Transportation. Storage. F" nancing. Standarization. Pricinc. Geograptiy of beef cattle slaughter, . Need for decentralizarz. on. . '. . . . . . . . . 45 47 48 49 49...'on, 1937, 1950 and 196B. Beef cattle numbe s illecally ;, tr oduced in Venezuela, 1960-1972 21 Slaughter cattle, production of beef, and dre sed weight per head in Venezuela, 1950- 1973. . . . 24 Price elastici ty of demand at retail; per- centage...

Acosta, Sady Ines Borjas-Paez

2012-06-07

290

Disparities in Geographic Access to Pediatric Subspecialty Care  

Microsoft Academic Search

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

Michelle L. Mayer

2008-01-01

291

Communicating via Fireflies: Geographic Routing on Duty-Cycled Sensors  

Microsoft Academic Search

Geographic routing is a useful and scalable point-to-point communication primitive for wireless sensor networks. However, previous work on geographic routing makes the unrealistic assumption that all the nodes in the network are awake during routing. This overlooks the common deployment scenario where sensor nodes are duty-cycled to save energy. In this paper we investigate several important aspects of geographic routing

S. Nath; P. B. Gibbons

2007-01-01

292

Geographic potential for outbreaks of Marburg hemorrhagic fever  

E-print Network

disease transmission from natural reservoir populations. INTRODUCTION Marburg virus and the Ebola viruses (family Filoviridae, genera Marburgvirus and Ebolavirus) have presented a series of enigmas for biologists and public health workers: complete..., with mysteries including the geographic origin of Ebola Reston virus. 3 The known geographic distribution of outbreaks of Ebola virus–caused hemorrhagic fever in recent years has appeared to be more consistent geographically and ecologically than...

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

2006-01-01

293

Geographic disparities in colorectal cancer survival  

PubMed Central

Background Examining geographic variation in cancer patient survival can help identify important prognostic factors that are linked by geography and generate hypotheses about the underlying causes of survival disparities. In this study, we apply a recently developed spatial scan statistic method, designed for time-to-event data, to determine whether colorectal cancer (CRC) patient survival varies by place of residence after adjusting survival times for several prognostic factors. Methods Using data from a population-based, statewide cancer registry, we examined a cohort of 25,040 men and women from New Jersey who were newly diagnosed with local or regional stage colorectal cancer from 1996 through 2003 and followed to the end of 2006. Survival times were adjusted for significant prognostic factors (sex, age, stage at diagnosis, race/ethnicity and census tract socioeconomic deprivation) and evaluated using a spatial scan statistic to identify places where CRC survival was significantly longer or shorter than the statewide experience. Results Age, sex and stage adjusted survival times revealed several areas in the northern part of the state where CRC survival was significantly different than expected. The shortest and longest survival areas had an adjusted 5-year survival rate of 73.1% (95% CI 71.5, 74.9) and 88.3% (95% CI 85.4, 91.3) respectively, compared with the state average of 80.0% (95% CI 79.4, 80.5). Analysis of survival times adjusted for age, sex and stage as well as race/ethnicity and area socioeconomic deprivation attenuated the risk of death from CRC in several areas, but survival disparities persisted. Conclusion The results suggest that in areas where additional adjustments for race/ethnicity and area socioeconomic deprivation changed the geographic survival patterns and reduced the risk of death from CRC, the adjustment factors may be contributing causes of the disparities. Further studies should focus on specific and modifiable individual and neighborhood factors in the high risk areas that may affect a person's chance of surviving cancer. PMID:19627576

Henry, Kevin A; Niu, Xiaoling; Boscoe, Francis P

2009-01-01

294

Young Americans Still Having Difficulty with Global Geographic Knowledge  

NSDL National Science Digital Library

In a report released earlier this week, the National Geographic Society announced the results of a recent survey of geographic knowledge among young persons (ages 18 to 24), from nine different countries. Conducted with the assistance of the RoperASW group, the survey revealed some rather disturbing gaps in the geographic knowledge base of young Americans and other young people around the world. Among the young people surveyed in the United States, nearly 30 percent could not locate the Pacific Ocean and more than half could not locate India, home of almost 20 percent of the world's population. John Fahey, the president of the National Geographic Society, also commented that, while nine out of 1young Americans could identify the United States on a world map, "it does make you wonder about the other 10 percent."The first link leads to a recent news article on this geographic survey that appeared in the Chicago Sun-Times. The second link will take visitors to the results of the National Geographic Survey, which also provides a sample quiz for persons to test their own geographic knowledge. Also sponsored by National Geographic, the third link features dozens of helpful thematic maps, dealing with historical and contemporary themes, such as political and cultural maps of the world. The fourth link leads to a 2001 report on improving secondary geographic education from the Royal Geographic Society. Provided by the Environmental Design Library at the University of California at Berkeley, the fifth site is an excellent annotated bibliography of source material for persons interested in learning and researching the cultural landscape of the United States. The sixth link leads to some famous remarks given by Carl Sauer (one of the 20th century's most respected geographers) on the subject of historical geography and its importance to understanding human communities. The final link leads to a sardonic editorial by Gillian Ferguson of the Scotsman newspaper in Scotland on these recent survey results.

Grinnell, Max

2002-01-01

295

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

PubMed Central

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

Moyersoen, Bernard; Weiss, Michael

2014-01-01

296

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

PubMed

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

Moyersoen, Bernard; Wei?, Michael

2014-01-01

297

GEOGRAPHIC ESTIMATION OF RUNOFF-MODEL PARAMETERS.  

USGS Publications Warehouse

The U. S. Geological Survey is developing techniques to estimate and evaluate unit-hydrograph and loss-rate parameter values for rainfall-runoff models using Geographic Information System (GIS) procedures. The data base includes basin, soil, and climatological characteristics that will be stored in a GIS, and unit-hydrograph and loss-rate parameters obtained from calibration of a commonly used flood-hydrograph rainfall-runoff model for 616 storms in 98 gaged drainage basins. Development of unit-hydrograph and loss-rate parameter-estimation techniques includes statistical methods (exploratory data analysis, regression analysis, and categorical data analysis) to relate the model parameters to hydrologic characteristics. The estimation techniques are evaluated by use of error analysis of simulated hydrograph characteristics (peak discharge, flood volume, and time to peak discharge). The hydrographs will be simulated with parameters estimated by the techniques for (1) 102 storms occurring at 36 gaged basins; and (2) a large storm system (one which produced floods with a 50-to 100-year recurrence interval).

Schmidt, Arthur, R.; Weiss, Linda, S.; Oberg, Kevin, A.

1987-01-01

298

Inferring social ties from geographic coincidences  

PubMed Central

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

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

2010-01-01

299

Inferring social ties from geographic coincidences.  

PubMed

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

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

2010-12-28

300

Columbines: a geographically widespread species flock.  

PubMed Central

Species in the columbine genus, Aquilegia, are known for their broad variation in ecology and floral morphology. Aquilegia is also known for the large degree of intercompatibility among its species, which has led to the suggestion that the genus has arisen recently. However, intercompatibility does not always imply recent divergence and the widespread distribution pattern of the genus has suggested an older age. We constructed phylogenies for Aquilegia plus its close relatives by using nucleotide sequence data from both nuclear and chloroplast DNA. The sequence data averaged over 1250 bp per species. Among the 14 columbine species sampled from Europe, Asia, and North America only 16-bp changes and one insertion/deletion event were detected. In contrast, related genera had from 3 to 45 times this level of variation. The phylogenies derived from the chloroplast and nuclear DNA sequences were highly concordant and suggest that the columbines are the result of a recent, rapid radiation. In contrast to other examples of species flocks, Aquilegia has radiated on a widespread geographical scale. By comparison with their related taxa, we suggest that the evolution of the nectar spur in Aquilegia was a key innovation for this genus and allowed rapid speciation through specialization to specific pollinators. PMID:8197196

Hodges, S A; Arnold, M L

1994-01-01

301

Geographical distribution of cercarial dermatitis in Norway.  

PubMed

Bird schistosomes can cause a disease called cercarial dermatitis, or swimmer's itch, in humans. The disease occurs when people have direct contact with fresh water or sea water containing the free-swimming cercariae of the flukes. The symptoms are well known, and include intense itching, maculae, papulae, urticariae and, in some cases, local oedema with enlarged lymph nodes and fever. In this study, we present the geographical distribution of freshwater cercarial dermatitis in Norway. The study is based on random reports obtained from both individuals and physicians treating patients with itching skin rash after freshwater bathing. The first case of cercarial dermatitis in Norway was reported in 1980 and was traced to a lake near Trondheim in the central part of Norway. In the following years, an increasing number of cases were reported, especially in southern Norway. However, case reports are distributed almost all over the country, even from lakes in northern Norway. As far as we know, these are the northernmost case reports in Europe. So far, only one fluke species (Trichobilharzia franki) from a single infected snail (Radix auricularia) has been identified in Norway. However, unidentified schistosomatid ocellate cercariae have been found on several occasions in snails collected from six lakes where swimmer's itch is frequently reported. Future studies should be performed to identify the fluke species, as well as the most important snail and bird hosts, in Norwegian lakes. PMID:21070686

Soleng, A; Mehl, R

2011-09-01

302

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.

303

Ecoregions and Ecoregionalization: Geographical and Ecological Perspectives  

NASA Astrophysics Data System (ADS)

Ecoregions, i.e., areas exhibiting relative homogeneity of ecosystems, are units of analysis that are increasingly important in environmental assessment and management. Ecoregions provide a holistic framework for flexible, comparative analysis of complex environmental problems. Ecoregions mapping has intellectual foundations in both geography and ecology. However, a hallmark of ecoregions mapping is that it is a truly interdisciplinary endeavor that demands the integration of knowledge from a multitude of sciences. Geographers emphasize the role of place, scale, and both natural and social elements when delineating and characterizing regions. Ecologists tend to focus on environmental processes with special attention given to energy flows and nutrient cycling. Integration of disparate knowledge from the many key sciences has been one of the great challenges of ecoregions mapping, and may lie at the heart of the lack of consensus on the “optimal” approach and methods to use in such work. Through a review of the principal existing US ecoregion maps, issues that should be addressed in order to advance the state of the art are identified. Research related to needs, methods, data sources, data delivery, and validation is needed. It is also important that the academic system foster education so that there is an infusion of new expertise in ecoregion mapping and use.

Loveland, Thomas R.; Merchant, James M.

2004-04-01

304

National Geographic Online: The Underground Railroad  

NSDL National Science Digital Library

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.

2003-01-01

305

Cartographic services contract...for everything geographic  

USGS Publications Warehouse

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.

Geological Survey (U.S.)

2003-01-01

306

Geographic Information System (GIS) and Geospatial Applications Spring 2013  

E-print Network

By definition, Nonpoint Source Pollution (NPS) affects a water body from sources such as polluted runoff from Wang Modeling Stephen F. Austin Campus Nonpoint Source Pollution with a Geographic Information System #12;2 Modeling Stephen F. Austin Campus Nonpoint Source Pollution with a Geographic Information System

Hung, I-Kuai

307

Sensitivity of distributional prediction algorithms to geographic data completeness  

Microsoft Academic Search

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

A Townsend Peterson; Kevin P Cohoon

1999-01-01

308

Case Study: Using Geographic Information Systems for Education Policy Analysis  

ERIC Educational Resources Information Center

Effective exploration of spatially referenced educational achievement data can help educational researchers and policy analysts accelerate interpretation of datasets to gain valuable insights. This paper illustrates the use of Geographic Information Systems (GIS) to analyze educational achievement gaps in Arkansas. It introduces the Geographic

Mulvenon, Sean W.; Wang, Kening; McKenzie, Sarah; Airola, Denise

2006-01-01

309

THE CIAO: WEB PORTAL OF GEOGRAPHIC INFORMATION FOR WEST AFRICA  

E-print Network

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

Paris-Sud XI, Université de

310

An Evolutionary Algorithm for the Selection of Geographically Informative Species  

E-print Network

-informative is introduced and tested on a set of data giving the species distribution of 82 species of crustaceanAn Evolutionary Algorithm for the Selection of Geographically Informative Species Daniel Ashlock@iastate.edu ABSTRACT The geographic distribution of species is of interest in making conservation plans, designating

Ashlock, Dan

311

Tweeting from the Town Square: Measuring Geographic Local Networks  

Microsoft Academic Search

This paper examines tweets about two geographically local events a shooting and a building collapse that took place in Wichita, Kansas and Atlanta, Georgia, respectively. Most Internet research has focused on examining ways the Internet can connect people across long distances, yet there are benefits to being connected to others who are nearby. People in close geographic proximity can provide

Sarita Yardi; Danah Boyd

2010-01-01

312

Acquired Levels of Geographical Concepts among 5th Grade Students  

ERIC Educational Resources Information Center

In this research, the geographical concepts that are recommended to be taught for primary school fifth grade students are analyzed. Three of these concepts are in developmental level whereas eight of them are in consolidation level. Of the three geographical concepts which it is recommended the students acquire at a developmental level, it was…

Balci, Ali

2010-01-01

313

GEOGRAPHY 200B: GEOGRAPHICAL THOUGHT, RESEARCH, AND PROFESSIONAL DEVELOPMENT  

E-print Network

GEOGRAPHY 200B: GEOGRAPHICAL THOUGHT, RESEARCH, AND PROFESSIONAL DEVELOPMENT Winter 2012 Class will be the historical arc of geographical thought with the formation of Geography as a discipline and its contemporary: geography as place, geography as space, geography as changes on the face of the earth, and geography

Lopez-Carr, David

314

Connecting the Demographic Dots: Geographic Mobility and Birth Intentions  

ERIC Educational Resources Information Center

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…

Myers, Scott M.

2010-01-01

315

International Journal of Geographical Information Science Vol. , No. , , 128  

E-print Network

, Department of Geography Pennsylvania State University, University Park, PA 16802, USA 2. National Center relations between moving geographic regions provides an adequate basis for the human conceptualization in the geographic world such as wildfires, storms, and migrations. A formal model of the cognitive conceptualization

Klippel, Alexander

316

Empirical analytic transformations between geographic and corrected geomagnetic coordinates  

NASA Technical Reports Server (NTRS)

Based upon a mathematical model of contours of constant corrected geomagnetic latitude in a polar projection of geographic coordinates, analytic equations are developed for converting geographic coordinates to corrected geomagnetic coordinates and vice versa. The equations were programmed for use on a small computer. This treatment is restricted to the Northern Hemisphere.

Comfort, R. H.

1970-01-01

317

Document replication strategies for geographically distributed web search engines  

E-print Network

. Compared to a centralized, single-center search engine, this architecture offers lower query response times-scale web search engine architecture with multiple, geographically distributed data centers (Baeza- YatesDocument replication strategies for geographically distributed web search engines Enver Kayaaslan a

Aykanat, Cevdet

318

Assessing Geographical Clustering of Outpatient Psychiatric Service Utilization in Philadelphia  

E-print Network

-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

Smith, Tony E.

319

Teaching for Geographic Literacy: Our Afterschool Geography Club  

ERIC Educational Resources Information Center

This research describes how enrolling students in an afterschool Geography Club affects their perception of the discipline and their geographic literacy. The creation of the afterschool club at this particular school came out of the recognition of the need to increase students' exposure to geographical content. The results of this study show the…

Thomas-Brown, Karen A.

2011-01-01

320

MODULE DESCRIPTION FORM CL 961 Geographical Information Systems (GIS)  

E-print Network

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

Mottram, Nigel

321

Two Perspectives on Data Quality Geographic Knowledge Production Through GIS  

E-print Network

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

California at Santa Barbara, University of

322

Illegal Drug Markets: The Geographic Perspective and Crime Propensity  

Microsoft Academic Search

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

Jennifer B. Robinson; George F. Rengert

2006-01-01

323

Geographic variation in nut size of Castanopsis species in Japan  

Microsoft Academic Search

The environmental conditions affecting the geographic variation in nut size of the Castanopsis species in Japan were examined. The mother trees having a relatively large nut tended to dominate in the geographically marginal area of the distribution range in Japan, i.e. the Japan Sea, Kanto, and Ryukyu areas, whereas in the central area, i.e. the Pacific area, mother trees having

Hiroo Yamada; Tomiyasu Miyaura

2005-01-01

324

Gene Flow and the Geographic Structure of Natural Populations  

Microsoft Academic Search

There is abundant geographic variation in both morphology and gene frequency in most species. The extent of geographic variation results from a balance of forces tending to produce local genetic differentiation and forces tending to produce genetic homogeneity. Mutation, genetic drift due to finite population size, and natural selection favoring adaptations to local environmental conditions will all lead to the

Montgomery Slatkin

1987-01-01

325

Impact of Sensing Coverage on Greedy Geographic Routing Algorithms  

E-print Network

in that region that receives the query may participate in data aggregation and reports the result back efficiency and scalability. However, greedy geographic routing may fail due to routing voids on random locations. For example, instead of querying a sensor with a particular ID, a user often queries a geographic

326

A geographic information system for fisheries management in American Samoa  

Microsoft Academic Search

This study illustrates a geographic information system developed to effectively analyze and visualize temporal and spatial patterns of the longline fishery in the American Samoa's Exclusive Economic Zone. The pelagic and tuna fishery in American Samoa has historically been an important component of the traditional domestic fisheries and nation's economy. This paper presents an innovative way to utilize the geographic

Francesca Riolo

2006-01-01

327

Sarasota County, Geographic Information Systems and Watershed Management  

Microsoft Academic Search

Once only used to create maps, Geographic Information System (GIS) data analysis has become a cost effective tool to identify and prioritize projects within a watershed. Sarasota County has been building a vast library of geographic data for several years and recently utilized this information within the context of watershed management. Two projects are discussed, the reprioritization of the Phillippi

Jon S. Perry

328

Geographic Profiles: A Technique for Teaching Spatial Relationships.  

ERIC Educational Resources Information Center

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)

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

2001-01-01

329

Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations  

Microsoft Academic Search

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

Adam B. Jaffe; Manuel Trajtenberg; Rebecca Henderson

1992-01-01

330

Efficient Greedy Geographical Non-Planar Routing with Rreactive Deflection  

E-print Network

Efficient Greedy Geographical Non-Planar Routing with Rreactive Deflection Fabrice Theoleyre, Eryk or operators add more routers to increase capacity and coverage. We assume that mesh routers benefit from-24Feb2009 #12;Efficient Greedy Geographical Non-Planar Routing with Reactive Deflection 2 Unlike

Paris-Sud XI, Université de

331

EFECTO DE LA APLICACIÓN DE RESIDUOS ORGÁNICOS SOBRE EL CULTIVO DEL MAÍZ EN SUELOS DEGRADADOS DEL ESTADO YARACUY, VENEZUELA  

Microsoft Academic Search

Effect of applications of organic residues on maize performance in two soils of Yaracuy State, Venezuela The intense land cultivation for maize cropping on the last 50 years in Yaracuy State, Venezuela, caused an accelerated soil degradation expressed by loss of soil organic matter and crop productivity. With the objective of improving those parameters, the use of organic residues were

Isabel Arrieche; Orlando Mora

2005-01-01

332

Geographic and environmental factors in pediatric cancer  

SciTech Connect

It is important to determine the relative contributions of genetic and environmental factors to the etiology of childhood cancer in order to elucidate the pathogenic mechanisms involved and to develop effective means of primary prevention. Geographic differences in cancer incidence as well as changes in incidence over calendar time have long been used to generate clues to possible etiologic agents. The important role of genetic factors in childhood cancer is clear, and is exemplified by the observations in retinoblastoma. The importance of the contributions of environmental factors in general and of specific factors in particular, to the etiology of cancers in children, has proven more difficult to determine. A variety of environmental factors have been implicated to varying degrees in the etiology of different childhood cancers. These factors include physical agents such as radiation, chemical agents such as nitrosamines, and organic solvents, and infectious agents such as the Epstein-Barr virus. The observations that certain compounds may act as teratogens when a prenatal exposure occurs early in pregnancy and as carcinogens when the exposure occurs late in pregnancy, suggests that there may be a continuum of teratogenesis and carcinogenesis. This finding has major implications for the possible biologic mechanisms that could be involved in childhood cancers and for the design of future research of their etiology and prevention. The etiology of childhood cancer should be viewed as an interaction of environmental factors to which the child or his parent were exposed together with varying degrees of genetically determined susceptibility of the child to the carcinogenic effects of these factors.

Gordis, L.

1986-07-15

333

Illuminating geographical patterns in species' range shifts.  

PubMed

Species' range shifts in response to ongoing climate change have been widely documented, but although complex spatial patterns in species' responses are expected to be common, comprehensive comparisons of species' ranges over time have undergone little investigation. Here, we outline a modeling framework based on historical and current species distribution records for disentangling different drivers (i.e. climatic vs. nonclimatic) and assessing distinct facets (i.e. colonization, extirpation, persistence, and lags) of species' range shifts. We used extensive monitoring data for stream fish assemblages throughout France to assess range shifts for 32 fish species between an initial period (1980-1992) and a contemporary one (2003-2009). Our results provide strong evidence that the responses of individual species varied considerably and exhibited complex mosaics of spatial rearrangements. By dissociating range shifts in climatically suitable and unsuitable habitats, we demonstrated that patterns in climate-driven colonization and extirpation were less marked than those attributed to nonclimatic drivers, although this situation could rapidly shift in the near future. We also found evidence that range shifts could be related to some species' traits and that the traits involved varied depending on the facet of range shift considered. The persistence of populations in climatically unsuitable areas was greater for short-lived species, whereas the extent of the lag behind climate change was greater for long-lived, restricted-range, and low-elevation species. We further demonstrated that nonclimatic extirpations were primarily related to the size of the species' range, whereas climate-driven extirpations were better explained by thermal tolerance. Thus, the proposed framework demonstrated its potential for markedly improving our understanding of the key processes involved in range shifting and also offers a template for informing management decisions. Conservation strategies would greatly benefit from identifying both the geographical patterns and the species' traits associated with complex modifications of species' distributions in response to global changes. PMID:24616088

Grenouillet, Gaël; Comte, Lise

2014-10-01

334

Teaching Poverty with Geographic Visualization and Geographic Information Systems (GIS): A Case Study of East Buffalo and Food Access  

ERIC Educational Resources Information Center

Although various methods have been used to teach about poverty in the social work classroom (e.g., quantitative, historical, and qualitative), the use of geographic visualization and geographic information systems (GIS) has become a relatively new method. In our analysis of food access on the East Side of Buffalo, New York, we demonstrate the…

Gjesfjeld, Christopher D.; Jung, Jin-Kyu

2014-01-01

335

Symbolic representation on geographic concepts and their mutual relationships  

NASA Astrophysics Data System (ADS)

Cartographic language has the characteristics of natural language. As the vocabulary in cartographic language, cartographic symbols are composed of exterior form and idealistic content. Geographic concepts are the essential attribute of geographic objects and cell of geographic thinking. Geographic concepts are thinking form of human brain and are invisible, which only needed to be represented by a certain form. Aiming at the problem of symbolic representation in geographic concepts and their mutual relationships, the geometrical composition of symbols of large scale topographic maps and the semantic and geometrical relationships among symbols were analyzed, the symbols system of topographic maps was regarded as a two-dimensional graphic language, and the relationship between symbols and geographic concepts was discussed. According to concept of logic and geometrical shape of symbols the represented categories of geographic concepts and their mutual relationships on the basis of symbols of topographic maps were defined and the actual examples were given, which provides the use for reference for studying cartographic language by logic method.

Su, Li; Chen, Yijin; Zhou, Danhui

2006-10-01

336

Francisco de Miranda and the Problem of Slavery in Venezuela: New Ideas and Concerns  

Microsoft Academic Search

This works examines the historic antecedents of the abolition of slavery in Venezuela in two parts: 1) The impact of Haiti's independence on Latin American and Caribbean colonies. 2) Francisco de Miranda's trajectory as Precursor of our emancipation; his opinions with regard to the Haitian revolution, and the help its leaders offered him in 1806. It underlines the contradiction between

José Marcial Ramos Guédez

2007-01-01

337

Rejuvenation of a giant oil field-Quiriquire Field, Venezuela: A team approach  

Microsoft Academic Search

Quiriquire field is located in the Maturin basin of eastern Venezuela, at the southeastern corner of the Serrania del Interior mountain range. Since its discovery in 1928, the field has produced over 750 MMBO from a stratigraphically trapped, shallow, Pliocene alluvial fan (Quiriquire Formation). A deep oil zone, the Los Jabillos sand of Oligocene age, was discovered in 1952 on

H. Friestad; R. Hull; D. Miller

1996-01-01

338

Evidence for clonal propagation in natural isolates of Plasmodium falciparum from Venezuela  

E-print Network

Urdaneta* , Altaf Lal , Christian Barnabe´ , Bruno Oury , Ira Goldman , Francisco J. Ayala§ , and Michel in the African sample. These results support the hypothesis that the population structure of P. falciparum in Venezuela, but not in Africa, is predominantly clonal. However, the impact of genetic recombina- tion

339

EL PRODUCTOR COMERCIAL DE CERDOS Y SU PERCEPCION CON RESPECTO A NUEVOS PARADIGMAS TECNOLOGICOS: CASO VENEZUELA  

Microsoft Academic Search

The modern pork sector in Venezuela practically born in 1958, basically sustained in the governmental strategy founded on the policy of imports substitution like development model for developing countries including the Latin American. Particularly the industrialist sector of pig meat it is developed to under this scheme. The production system of pigs (the farms) is enough similar to the one

Francisca A Viloria

340

Geochemical study of products associated with spontaneous oxidation of coal in the Cerro Pelado Formation, Venezuela  

Microsoft Academic Search

The aim of this research work is a geochemical, mineralogical, and textural characterization of spontaneously smouldered coal-derived products in northwestern Venezuela (Cerro Pelado Formation, some 10km from Pedregal city). Several solid samples were collected from this formation, six of unweathering coal, an other six of resulting unmelted rocks forming on a surface coal bed, and the last four of mineralizations

M. Martínez; G. Márquez; F. J. Alejandre; J. J. Del Río; A. Hurtado

2009-01-01

341

Actividad microbiana en suelos de sabanas de los Llanos Orientales de Venezuela convertidas en pasturas  

Microsoft Academic Search

Micr obial activity in Eastern Venezuelan savannas turned into grasslands. We studied the effects of season and management practices on chemical properties and biochemical parameters in a typical Ultisol soil of native and introduced pastures of the Eastern savannas of Venezuela. Sseason, soil management, and their interaction, significantly affected chemical properties and biochemical parameters. The total carbon and the water

Y. Gómez; J. Paolini

2006-01-01

342

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

PubMed

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

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

1980-05-01

343

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

ERIC Educational Resources Information Center

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,…

Anderson, Teresa, Comp.; And Others

344

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

E-print Network

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...

Garcia, Ivette

2012-06-07

345

PATRON DE LIPIDOS EN PREESCOLARES DE BAJOS RECURSOS SOCIOECONOMICOS (VALENCIA, VENEZUELA)  

Microsoft Academic Search

Overweight and obesity are a public health problem worldwide affecting adults and children as well. The aim of this study was to assess overweight, lipid profile and cardiovascular risk ratios in 390 preschool children from low socio-economic level from Valencia, Venezuela. Nutritional anthropometric evaluation measured by body dimensions, and serum determination of cholesterol, triglycerides, HDL- cholesterol, LDL-cholesterol and cardiovascular risk

Liseti Solano; Emma Velásquez; Gloria Naddaf; María Páez

346

Ariid sea catfishes from the coeval Pirabas (Northeastern Brazil), Cantaure, Castillo (Northwestern Venezuela), and Castilletes  

E-print Network

), and the corresponding fossil records are the product of evolutionary events in the Proto- Caribbean. The objective of this paper was to describe a fossil ariid skull from the early Miocene Pirabas Formation (Brazil Venezuela), and Castilletes (North Colombia) formations (early Miocene), with description of three new

Bermingham, Eldredge

347

Valores y estética del paisajismo japonés: Su historia y aporte para Venezuela  

Microsoft Academic Search

On the occasion of a plan to construct the first Japanese garden in Venezuela, this paper discusses the purpose, essentials, main classes and history of traditional Japanese landscape design, with an eye on the construction of the garden in question and its contribution to intercultural dialogue. The philosophical values and main parameters of beauty of Japanese aesthetics are analyzed; guidelines

Ignacio Aristimuño

348

Mantle flow beneath northwestern Venezuela: Seismic evidence for a deep origin of the Mrida Andes  

E-print Network

distinct tectonic blocks that move independently of the surrounding plates. For example, the triangular­slip Oca­Ancon (OA) Fault to the north, is moving northeastward relative to the SA plate regional tectonics in western Venezuela. Using the method proposed by Wolfe and Silver (1998), SKS

Niu, Fenglin

349

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

ERIC Educational Resources Information Center

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…

Cole, Mike

2014-01-01

350

Tectonic inheritance, crustal architecture, and contrasting structural styles in the Venezuela Andes  

Microsoft Academic Search

Surface and subsurface data image contrasting structural styles for the two flanks of the Venezuela Andes. In the north, a flexural basin developed in Neogene times between the Andes and the Lake Maracaibo. North verging thrusts are mainly detached in the pre-Cretaceous substratum and form a deeply buried antiformal stack. Secondary décollement levels occur both in the Upper Cretaceous and

Bernard Colleta; François Roure; Bruno De Toni; Daniel Loureiro; Herminio Passalacqua; Yves Gou

1997-01-01

351

Exposición ocupacional a solventes orgánicos en una fábrica de calzado en Valencia, Venezuela, 2001  

Microsoft Academic Search

SUMMARY Potential health effects of organic solvents exposure were assessed. Thirty six workers of shoe manufacturer located in Valencia, Venezuela, were studied. They had a medical exam, and an occupational history. Biological indicators of exposure (toluene in blood; methylethy- ketone, methylisobuthylketone, acetone and hippuric acid in urine) and effect (creatinine in urine, hematologic analyses, bilirubin, transaminases and alkaline phoshatase-AP) were

Maritza Rodríguez; Guido Squillante; Maritza Rojas; TRABAJOS ORIGINALES

352

Democracy and state bias in Latin America: Some lessons from Mexico, Peru and Venezuela  

Microsoft Academic Search

This discussion considers why democracy has not so far led to the creation of impartial, honest and effective state institutions in Mexico, Venezuela and Peru. The explanation offered is essentially historical?institutional. Non?impartial (that is, biased) types of governance have a tendency to reproduce themselves over time due to the advantages that they offer to the powerful. However this observation, while

George Philip

1999-01-01

353

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

ERIC Educational Resources Information Center

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)

Rojas, Alicia Mabel

1980-01-01

354

ACTITUD DE MÉDICOS Y ESTUDIANTES DE MEDICINA FRENTE A LA EUTANASIA. MÉRIDA. VENEZUELA  

Microsoft Academic Search

Attitudes of physicians and medicine students towards euthanasia. Mérida. Venezuela. Euthanasia creates a dilemma for medical personnel, and creates controversy between those who argue on its favour and those who argue against it. The object of this paper is to know the attitudes on this subject held by physicians and last year medical students in the Autonomous Institute University Hospital

Rossana Mazzari; Sulin Wong; Magali López; Fernando Rivas

355

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

NASA Astrophysics Data System (ADS)

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

Colmenter, L.; Sajo-Bohus, L.; Liendo, J. A.; Greaves, E. D.; Coelho, D.; Barros, H.; Castillo, J.; Esteves, L. M.; Ruiz, N.; Morales, L.; Lugo, I.

2007-10-01

356

Counter-Hegemonic Regionalism and Higher Education for All: Venezuela and the ALBA  

ERIC Educational Resources Information Center

This paper employs new regionalism theory and regulatory regionalism theory in its analysis and theorisation of the Bolivarian Alliance for the Peoples of Our America (ALBA) as a counter-hegemonic Latin American and Caribbean (LAC) regionalism. As (initially) the regionalisation of Venezuela's Bolivarian Revolution, ALBA is centred around the idea…

Muhr, Thomas

2010-01-01

357

Volatile compounds from Tagetes pusilla (Asteraceae) collected from the Venezuela Andes.  

PubMed

The essential oil from the leaves of Tagetes pusilla Kunth (Asteraceae) collected from Mérida, Venezuela, was analyzed by GC/MS. A yield of 0.38% oil was obtained by hydrodistillation. Only two components, trans-anethole and 4-allylanisole were identified by comparison of their mass spectra with those in the Wiley GC-MS Library data base. PMID:20839636

Buitrago, Diolimar; Rojas, Luis B; Rojas, Janne; Morales, Antonio

2010-08-01

358

Use of geographic data in emergency response decision making system  

SciTech Connect

Geographic data have a number of key roles in emergency response systems focused on releases of hazardous material to the environment. Maps are a key element in allowing emergency response personnel to become oriented during a response and in presenting status information effectively to these personnel. Geographic data are essential for modeling to predict dispersal patterns during a release. It is also necessary to integrate model and measurement data with demographic information in order to assess the consequences of a release. Appropriate support for such capabilities is based on a number of evolving technologies including fast computers, large databases, network technology, remote sensing and geographic information systems.

Walker, H.

1997-07-01

359

New geographical approaches to control of some parasitic zoonoses.  

PubMed Central

The advent of new technology for geographical representation and spatial analysis of databases from different sectors offers a new approach to planning and managing the control of tropical diseases. This article reviews the geographical and intersectoral aspects of the epidemiology and control of African trypanosomiasis, cutaneous and visceral leishmaniasis, Chagas disease, schistosomiasis, and foodborne trematode infections. The focal nature of their transmission, increasing recognition of the importance of animal reservoirs, and the need to understand environmental factors influencing their distribution are common to all these diseases. Geographical information systems (GIS) open a completely new perspective for intersectoral collaboration in adapting new technology to promote control of these diseases. PMID:7743598

Mott, K. E.; Nuttall, I.; Desjeux, P.; Cattand, P.

1995-01-01

360

Genetic diversity and geographic pattern in early South American cotton domestication.  

PubMed

Amplified fragment length polymorphism fingerprinting was applied to survey the genetic diversity of primitive South American Gossypium barbadense cotton for establishing a possible link to its pre-Columbian expansion. New germplasm was collected along coastal Peru and over an Andean transect in areas where most of the archaeological evidence relating to cotton domestication has been recorded. Gene bank material of three diploid (G. raimondii, G. arboreum, and G. herbaceum) and four allotetraploid cotton species (G. hirsutum, G. mustelinum, G. tomentosum and additional G. barbadense) was added for inter- and intra-specific comparison. Eight primer combinations yielded 340 polymorphic bands among the 131 accessions. The obtained neighbor joining and unweighted pair-group method with arithmetic means are in full agreement with the known cytogenetics of the tetraploid cottons and their diploid genome donors. The four tetraploid species are clearly distinct based on taxonomic classification. The genetic diversity within G. barbadense reveals geographic patterns. The locally maintained cottons from coastal Peru display a distinct genetic diversity that mirrors their primitive agro-morphological traits. Accessions from the northernmost coast of Peru and from southwestern (SW) Ecuador cluster basal to the east-of-Andes accessions. The remaining accessions from Bolivia, Brazil, Columbia, Venezuela, and the Caribbean and Pacific islands cluster with the east-of-Andes accessions. Northwestern Peru/SW Ecuador (the area flanking the Guayaquil gulf) appears to be the center of the primitive domesticated G. barbadense cotton from where it spread over the Andes and expanded into its pre-Columbian range. PMID:15580473

Westengen, Ola T; Huamán, Zósimo; Heun, Manfred

2005-01-01

361

13 CFR 108.130 - Identified Low Income Geographic Areas.  

Code of Federal Regulations, 2010 CFR

...VENTURE CAPITAL (âNMVCâ) PROGRAM Qualifications for the NMVC Program 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...

2010-01-01

362

47 CFR 76.984 - Geographically uniform rate structure.  

Code of Federal Regulations, 2010 CFR

...BROADCAST RADIO SERVICES MULTICHANNEL VIDEO AND CABLE TELEVISION SERVICE Cable Rate...system in any geographic area in which the video programming services offered by the operator...effective competition, or (2) Any video programming offered on a per channel...

2010-10-01

363

47 CFR 76.984 - Geographically uniform rate structure.  

Code of Federal Regulations, 2011 CFR

...BROADCAST RADIO SERVICES MULTICHANNEL VIDEO AND CABLE TELEVISION SERVICE Cable Rate...system in any geographic area in which the video programming services offered by the operator...effective competition, or (2) Any video programming offered on a per channel...

2011-10-01

364

47 CFR 76.984 - Geographically uniform rate structure.  

Code of Federal Regulations, 2012 CFR

...BROADCAST RADIO SERVICES MULTICHANNEL VIDEO AND CABLE TELEVISION SERVICE Cable Rate...system in any geographic area in which the video programming services offered by the operator...effective competition, or (2) Any video programming offered on a per channel...

2012-10-01

365

47 CFR 76.984 - Geographically uniform rate structure.  

Code of Federal Regulations, 2013 CFR

...BROADCAST RADIO SERVICES MULTICHANNEL VIDEO AND CABLE TELEVISION SERVICE Cable Rate...system in any geographic area in which the video programming services offered by the operator...effective competition, or (2) Any video programming offered on a per channel...

2013-10-01

366

Geographic drivers of avian diversification in the Philippine archipelago  

E-print Network

I investigate the relative roles of different classes of geographical barriers in the diversification of the Philippine avifauna, by inferring the evolutionary relationships of 20 avian groups with DNA sequence data. In ...

Hosner, Peter A.

2014-05-31

367

Geographic Routing in 3D Matthias Witt and Volker Turau  

E-print Network

Geographic Routing in 3D Matthias Witt and Volker Turau Hamburg University of Technology Institute of Telematics Schwarzenbergstr. 95, 21073 Hamburg, Germany {matthias.witt,turau}@tuhh.de ABSTRACT Existing

Turau, Volker

368

Thoracic trident pigmentation in Drosophila melanogaster : Differentiation of geographical populations  

E-print Network

Thoracic trident pigmentation in Drosophila melanogaster : Differentiation of geographical : Drosophila melanogaster, pigmentation, teuzperature response, maternal effect, latitudinal cline. Résumé La pigmentation thoracique en forme de trident chez Drosophila melanogaster : différenciation de populations de

Paris-Sud XI, Université de

369

on-Toblerian Geographical Spaces Gilberto Cmara1*  

E-print Network

relevant critiques on the limits of GIS made by postmodern thinkers can be addressed by adopting Introduction Spatial relations are a fundamental part of applications that use geographical information systems

Camara, Gilberto

370

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

Microsoft Academic Search

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 \\

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

2004-01-01

371

47 CFR 22.503 - Paging geographic area authorizations.  

Code of Federal Regulations, 2013 CFR

...possessions of the United States of America. (2) Major Economic...Puerto Rico and the United States Virgin Islands...agreement between the United States government and the...Licensees may determine the population of geographic...

2013-10-01

372

47 CFR 22.503 - Paging geographic area authorizations.  

Code of Federal Regulations, 2012 CFR

...possessions of the United States of America. (2) Major Economic...Puerto Rico and the United States Virgin Islands...agreement between the United States government and the...Licensees may determine the population of geographic...

2012-10-01

373

47 CFR 22.503 - Paging geographic area authorizations.  

Code of Federal Regulations, 2011 CFR

...possessions of the United States of America. (2) Major Economic...Puerto Rico and the United States Virgin Islands...agreement between the United States government and the...Licensees may determine the population of geographic...

2011-10-01

374

DIVISION OF INFECTIOUS DISEASES AND GEOGRAPHIC MEDICINE DEPARTMENT OF MEDICINE  

E-print Network

DIVISION OF INFECTIOUS DISEASES AND GEOGRAPHIC MEDICINE DEPARTMENT OF MEDICINE 300 PASTEUR DRIVE, S infectious disease clinic will be decreased considerably. We also hope to facilitate, MD, FACP, FIDSA Professor of Medicine Division of Infectious Diseases

Kay, Mark A.

375

Impacted geographers: a response to Pain, Kesby and Askins  

E-print Network

technocrats are hoping for. Their apparent impetus is that the time has come for `participatory geographers, designed to turn universities into factories competing against each other for scarce resources. As Smith

376

11.520 Workshop on Geographic Information Systems, Fall 2002  

E-print Network

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 ...

Ferreira, Joseph

377

Energy Efficient Geographical Load Balancing via Dynamic Deferral of Workload  

E-print Network

to reduce energy cost by exploiting the electricity price differences across regions. However. INTRODUCTION Increasing energy prices and ability to dynamically track these price variations dueEnergy Efficient Geographical Load Balancing via Dynamic Deferral of Workload Muhammad Abdullah

Gupta, Rajesh

378

Water Supply Planning Using an Expert Geographic Information System  

E-print Network

sources and demand centers. The planning system is comprised of an expert system, which contains the logical rules and expertise of water resources planning experts; a geographic information system, which stores and analyzes spatially distributed water...

McKinney, Daene C.; Burgin, John F.; Maidment, David R.

379

Geographically Distributed Development : trends, challenges and best practices  

E-print Network

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 ...

Yin, Yuhong

2007-01-01

380

Geographic Analysis of Alaska Lake Districts  

NASA Astrophysics Data System (ADS)

The state of Alaska has over 400,000 lakes greater than 0.01 km2 in surface area covering approximately 3.3% of the landscape. As in most lake-rich regions, these lakes are unevenly distributed on the landscape. So in order to better understand how lakes are organized on the landscape and relate this geographic organization to other climatologic, geologic, and biogeographic characteristics, we analyzed the spatial distribution of Alaska lakes. Using a combination of numerical abundance and surface-area extent of lakes, we selected lake density thresholds to identify and delineate 22 lake districts in Alaska. The total area of these 22 lakes districts occupy 16% of Alaska, yet encompass 64% of lakes and 76% of lake surface-area. The three largest lake districts are associated with the Yukon-Kuskokwin Delta, the Northern Arctic Coastal Plain, and the mountain front of the Alaskan Range on the Alaska Peninsula. Interestingly, these largest lake districts are covered by >17% lakes, while most of the smaller lake districts we identified have <10% lake cover. Of the remaining smaller lake districts, 9 are associated with mountain fronts or intermountain basins, 4 are associated with coastal plains, 3 are associated with floodplains and deltas, and 3 occur in high-elevation or mountain terrain. The highest numerical lake densities occur at deltas, while relatively lower densities occur in mountainous areas where individual lakes are often larger in surface area and likely volume. Comparison of these lake districts were made to permafrost distribution, glacial history, lithology, watershed position, and regional hydrologic budgets and regimes to better understand where lake-rich regions occur, why, and how they might change in the future. Ten of the 22 lake districts occur in areas dominated by continuous permafrost, 6 occur in areas of discontinuous or sporadic permafrost, and the other 6 occur in regions without perennially frozen soils. The majority of lake districts, 63% occur in regions that were glaciated during the last glacial maximum, yet several of the largest lake districts occur in unglaciated terrain. We also made comparisons of lake districts to other natural units used for landscape analysis including ecoregions and watersheds, and human- delineated units including National Parks (NP) and National Wildlife Refuges (NWR). Not surprisingly, 12 of these lake districts occur partly or wholly within NWRs, and all but two are associated with other state or federally managed parks or wildlife refuges. Analysis of lake districts in Alaska, or other regions on Earth, may prove to be useful for better understanding lake change, aquatic and terrestrial habitats, and regional hydrologic budgets and regimes. Such fresh views of the landscape may become increasingly important for improving natural resource science and management in Alaska, where future climate change is predicted to be very rapid.

Arp, C. D.; Jones, B. M.; Zimmerman, C. E.

2007-12-01

381

An Association Rule Discovery System Applied to Geographic Data  

Microsoft Academic Search

\\u000a An association rule discovery system has been developed for geographic data. Association rules are applicable to the interpretation\\u000a of remote sensing images, in which rules derived from another data set can provide ancillary data to guide land cover mapping.\\u000a The software system developed, called Aspect, works with standard geographic data formats and extends the association rule formulation to handle spatial

Laura C. Rodman; John Jackson; Ross K. Meentemeyer

382

Communicating via fireflies: geographic routing on duty-cycled sensors  

Microsoft Academic Search

Geographic routing is a useful and scalable point-to-point commu- nication primitive for wireless sensor networks. However, previous work on geographic routing makes the unrealistic assumption that all the nodes in the network are awake during routing. This over- looks the common deployment scenario where sensor nodes are duty-cycled to save energy. In this paper we investigate several im- portant aspects

Suman Nath; Phillip B. Gibbons

2007-01-01

383

Human Conceptions of Spaces: Implications for Geographic Information Systems1  

Microsoft Academic Search

The way people conceptualize space is an important consideration for the design of geographic information systems, because a better match with peopleÕs thinking is expected to lead to easier-to- use information systems. Everyday space, the basis to geographic information systems (GISs), has been characterized in the literature as being either small-scale (from table-top to room-size spaces) or large-scale (inside-of-building spaces

Scott M. Freundschuh; Max J. Egenhofer; Boardman Hall

1997-01-01

384

TIGER5---Extraction of geographic information from the TIGER system  

SciTech Connect

The need for geographic information in digital form is becoming apparent in many areas, including Emergency Response Planning and Management. The Bureau of Census recognized this need and developed an automated geographic data base, known as Topologically Integrated Geographic Encoding and Referencing (TIGER) System, to produce the geographic products for the 1990 census. The Bureau makes the information available to the public on CD-ROM disks. As distributed, the geographic information is not directly visible, and a program is needed to display the information in a graphic form. MapInfo is a commercially available program that has the capability to display maps and allows the user to perform certain geographic analyses. MapInfo runs on a variety of low-cost platforms that may be found in an average office environment, as well as on high-performance work stations. The TIGER5 program developed by the Emergency Management Information Systems (EMIS) project at Oak Ridge National Laboratory reads files directly from the Census Bureau TIGER/Line CD-ROM and creates MapInfo Exchange Format Files that can be directly imported into MapInfo. The standard default values for scaling parameters are used, and the resulting map is in the same coordinate system as the world and state maps distributed with MapInfo.

Gryder, R.K.

1992-03-01

385

Neotropical genera of Naucoridae (Hemiptera: Heteroptera: Nepomorpha): new species of Placomerus and Procryphocricos from Guyana and Venezuela.  

PubMed

The Neotropical fauna of saucer bugs (Naucoridae) currently includes four monotypic genera. Recent extensive collecting in Venezuela has produced three new species in two of these genera. In addition, undetermined Guyanan specimens of one of the new species were found in the United States National Museum of Natural History. Thus, described here are Placomerus obscuratus n. sp. from Guyana and Venezuela with brachypterous and macropterous hindwing forms, and two species of Procryphocricos from Venezuela. Procryphocricos quiu n. sp. is described from the brachypterous forewing form and Procryphocricos macoita n. sp. from both brachypterous and macropterous forms. Previously described species also are discussed. PMID:24869509

Sites, Robert W; Camacho, Jesús

2014-01-01

386

Coinfection with Three Ehrlichia Species in Dogs from Thailand and Venezuela with Emphasis on Consideration of 16S Ribosomal DNA Secondary Structure  

PubMed Central

As part of a larger study to investigate tick-borne infections in dogs from Thailand and Venezuela, documentation of coinfection with three Ehrlichia species in two dogs, one from each country, became the focus of the present study. Although neither dog had clinical signs attributable to ehrlichiosis, both dogs were anemic and neutropenic and the Thai dog was thrombocytopenic. Genus- and species-specific PCR targeting the 16S rRNA genes indicated that both dogs were coinfected with Ehrlichia canis, E. platys, and E. equi. To our knowledge, these results provide the first molecular documentation for the presence of E. equi in dogs from these countries. Using universal bacterial PCR primers, one nearly full-length 16S rRNA gene could be amplified from each dog. The sequences were identical to each other and almost identical to that of E. platys (AF156784), providing the first E. platys 16S ribosomal DNA (rDNA) sequences reported from these two geographically divergent countries. To determine whether these sequence differences allow differentiation between these two strains and other published 16S rDNA E. platys sequences, we performed a phylogenetic analysis of the rRNA, incorporating the consideration of secondary structure. PMID:11136754

Suksawat, Jiraporn; Pitulle, Christian; Arraga-Alvarado, Cruz; Madrigal, Karina; Hancock, Susan I.; Breitschwerdt, Edward B.

2001-01-01

387

Review and synthesis of problems and directions for large scale geographic information system development  

NASA Technical Reports Server (NTRS)

Problems and directions for large scale geographic information system development were reviewed and the general problems associated with automated geographic information systems and spatial data handling were addressed.

Boyle, A. R.; Dangermond, J.; Marble, D.; Simonett, D. S.; Tomlinson, R. F.

1983-01-01

388

Misión Madres Del Barrio: A Bolivarian Social Program Recognizing Housework and Creating A Caring Economy in Venezuela  

E-print Network

ABSTRACT: This thesis began as a project about Misión Madres del Barrio; and it quickly transformed into a glimpse of the Bolivarian Revolution underway in Venezuela. Misión Madres del Barrio (MMB) is one of the pioneering ...

Fischer-Hoffman, Cory

2008-08-20

389

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

E-print Network

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 ...

Parisca-Blanco, Sonia

2005-01-01

390

Cloning and functional analysis of a phosphopantetheinyl transferase superfamily gene associated with jadomycin biosynthesis in Streptomyces venezuelae ISP5230  

Microsoft Academic Search

Sequence analysis of a XhoI\\/SacI fragment of chromosomal DNA downstream of jadL in the Streptomyces venezuelae ISP5230 gene cluster for jadomycin biosynthesis detected a partial ORF similar in its deduced amino acid sequence to the hetI product involved in synthesizing a regulator of heterocyst spacing in Anabaena. By probing a phage library of S. venezuelae DNA with the XhoI\\/SacI fragment,

Liru Wang; Jennifer McVeyã; Leo C. Vining

391

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

SciTech Connect

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.

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

1996-08-01

392

Potential effects of global climatic change on the phenology and yield of maize in venezuela  

Microsoft Academic Search

Simulated impacts of global and regional climate change, induced by an enhanced greenhouse effect and by Amazonian deforestation, on the phenology and yield of two grain corn cultivars in Venezuela (CENIAP PB-8 and OBREGON) are reported. Three sites were selected:Turén, Barinas andYaritagua, representing two important agricultural regions in the country. The CERES-Maize model, a mechanistic process-based model, in theDecision Support

Carlos E. Maytín; Miguel F. Acevedo; Ramón Jaimez; Rigoberto Andressen; Mark A. Harwell; Alan Robock; Aura Azócar

1995-01-01

393

Individuals in a Collectivist World: Born in the U.S.A., Teaching in Caracas, Venezuela  

ERIC Educational Resources Information Center

Venezuela is a country slightly larger than twice the size of California, the third largest U.S.A. state in land area. Caracas, the capitol city, is home to a population of 6 million people nested into a space that is actually smaller in size than the area of Minneapolis-St. Paul, Minnesota, U.S.A., a city/suburb of only 2.8 million people. In…

Warring, Douglas F.; Huber-Warring, Tonya

2006-01-01

394

Neotectonic and paleoseismicity studies on the Urumaco Fault, northern Falcón Basin, northwestern Venezuela  

Microsoft Academic Search

The northern Falcón Basin in northwestern Venezuela is affected by several small active faults, subordinated to the major right-lateral east–west-trending Oca–Ancón Fault System. A set of prominent NW–SE right-lateral faults — synthetic shears — such as the Urumaco, R??o Seco, Lagarto and La Soledad faults, stands out among those. The Urumaco Fault, located between the Lagarto and Mitare rivers (in

Franck A. Audemard; Jean-Claude Bousquet; José A. Rodr??guez

1999-01-01

395

Social change, population policies, and fertility decline in Colombia and Venezuela  

Microsoft Academic Search

This paper takes a comparative case-study approach to examine the social and policy correlates of fertility decline. The analysis compares fertility behavior across a mature and young cohort of women in Colombia and Venezuela, two countries that experienced rapid demographic change under dissimilar socioeconomic and population policy conditions. Based on the distinction between birth-spacing and birth-stopping behavior the analysis tests

Emilio A. Parrado

2000-01-01

396

The Cuba-Venezuela Alliance: “Emancipatory Neo-Bolivarismo” Or Totalitarian Expansion?  

Microsoft Academic Search

This study examines the background as well as the ideological foundations underpinning the Cuba-Venezuela alliance. Castro and Chavez are now trying to consolidate a new political axis in Latin America, funded by Chavez’ oil diplomacy. Similarities with the Cuban experiment are highlighted, as well as Castro’s collaboration with the leadership of the Movimiento Revolucionario Bolivariano-MBR 200. The various dimensions of

Hernán Yánez

2005-01-01

397

Geographic information systems: their use in environmental epidemiologic research.  

PubMed Central

Advances in geographic information system (GIS) technology, developed by geographers, provide new opportunities for environmental epidemiologists to study associations between environmental exposures and the spatial distribution of disease. A GIS is a powerful computer mapping and analysis technology capable of integrating large quantities of geographic (spatial) data as well as linking geographic with nongeographic data (e.g., demographic information, environmental exposure levels). In this paper we provide an overview of some of the capabilities and limitations of GIS technology; we illustrate, through practical examples, the use of several functions of a GIS including automated address matching, distance functions, buffer analysis, spatial query, and polygon overlay; we discuss methods and limitations of address geocoding, often central to the use of a GIS in environmental epidemiologic research; and we suggest ways to facilitate its use in future studies. Collaborative efforts between epidemiologists, biostatisticians, environmental scientists, GIS specialists, and medical geographers are needed to realize the full potential of GIS technology in environmental health research and may lead to innovative solutions to complex questions. Images p598-a Figure 2. Figure 3. A Figure 3. B Figure 3. C Figure 3. D Figure 3. E PMID:9288494

Vine, M F; Degnan, D; Hanchette, C

1997-01-01

398

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

399

[Direct genetic manipulation and criminal code in Venezuela: absolute criminal law void?].  

PubMed

The judicial regulation of genetic biotechnology applied to the human genome is of big relevance currently in Venezuela due to the drafting of an innovative bioethical law in the country's parliament. This article will highlight the constitutional normative of Venezuela's 1999 Constitution regarding this subject, as it establishes the framework from which this matter will be legally regulated. The approach this article makes towards the genetic biotechnology applied to the human genome is made taking into account the Venezuelan penal law and by highlighting the violent genetic manipulations that have criminal relevance. The genetic biotechnology applied to the human genome has another important relevance as a consequence of the reformulation of the Venezuelan Penal Code discussed by the country's National Assembly. Therefore, a concise study of the country's penal code will be made in this article to better understand what judicial-penal properties have been protected by the Venezuelan penal legislation. This last step will enable us to identify the penal tools Venezuela counts on to face direct genetic manipulations. We will equally indicate the existing punitive loophole and that should be covered by the penal legislator. In conclusion, this essay concerns criminal policy, referred to the direct genetic manipulations on the human genome that haven't been typified in Venezuelan law, thus discovering a genetic biotechnology paradise. PMID:12379984

Cermeño Zambrano, Fernando G De J

2002-01-01

400

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

USGS Publications Warehouse

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.

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

1988-01-01

401

Household energy use in urban Venezuela: Implications from surveys in Maracaibo, Valencia, Merida, and Barcelona-Puerto La Cruz  

SciTech Connect

This report identifies the most important results of a comparative analysis of household commercial energy use in Venezuelan urban cities. The use of modern fuels is widespread among all cities. Cooking consumes the largest share of urban household energy use. The survey documents no use of biomass and a negligible use of kerosene for cooking. LPG, natural gas, and kerosene are the main fuels available. LPG is the fuel choice of low-income households in all cities except Maracaibo, where 40% of all households use natural gas. Electricity consumption in Venezuela`s urban households is remarkably high compared with the levels used in households in comparable Latin American countries and in households of industrialized nations which confront harsher climatic conditions and, therefore, use electricity for water and space heating. The penetration of appliances in Venezuela`s urban households is very high. The appliances available on the market are inefficient, and there are inefficient patterns of energy use among the population. Climate conditions and the urban built form all play important roles in determining the high level of energy consumption in Venezuelan urban households. It is important to acknowledge the opportunities for introducing energy efficiency and conservation in Venezuela`s residential sector, particularly given current economic and financial constraints, which may hamper the future provision of energy services.

Figueroa, M.J.; Sathaye, J.

1993-08-01

402

Teacher Resources-The Canadian Council for Geographic Education  

NSDL National Science Digital Library

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.

2012-07-20

403

Malarial parasites as geographical markers in migratory birds?  

PubMed Central

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

Fallon, Sylvia M; Fleischer, Robert C; Graves, Gary R

2006-01-01

404

Hemodynamic response in a geographical word naming verbal fluency test.  

PubMed

Functional hemodynamic response was studied in a new Verbal Fluency Task (VFT) that demanded the production of geographical words while fMRI data was obtained. Participants completed 7 trials with a total duration of 2 min. 20 s. Four simple arithmetic subtraction trials were alternated with 3 geographical naming trials. Each trial had a duration of 20 s. Brain activity was contrasted between both conditions and significant differences (p < .05, Family Wise Error correction) were observed in the prefrontal medial gyrus, typically associated with word retrieval and phonological awareness, and in the parahippocampal gyrus, posterior cingulate cortex and lingual gyrus, areas related to spatial cognition. These results indicate that geographic VFT could be incorporated into a browser of cognitive processes using VFT considering its specific relationship with spatial cognition. Further investigations are proposed, taking special interest in the gender variable and eliminating phonological restrictions, because the evoked Argentinean cities and towns ended in a consonant letter. PMID:25012096

Marino, Julian; Redondo, Santiago; Luna, Fernando G; Sanchez, Luis M; Torres, Gustavo Foa

2014-01-01

405

Health based geographical information systems: Their potential examined in the light of existing data sources  

Microsoft Academic Search

There is much potential for the use of geographical information systems (GIS) within the management and analysis of health and health care data. This paper addresses the problems of using routine data in the creation of geographical information systems for health. The numerous sources of British official routine health information however vary greatly in their geographical coverage and geographical detail.

Liz Twigg

1990-01-01

406

Modeling the geographical studies with GeoGebra-software  

E-print Network

The problem of mathematical modeling in geography is one of the most important strategies in order to establish the evolution and the prevision of geographical phenomena. Models must have a simplified structure, to reflect essential components and must be selective, structured, and suggestive and approximate the reality. Models could be static or dynamic, developed in a theoretical, symbolic, conceptual or mental way, mathematically modeled. The present paper is focused on the virtual model which uses GeoGebra software, free and available at www.geogebra.org, in order to establish new methods of geographical analysis in a dynamic, didactic way.

Soare, Ionica

2012-01-01

407

Mobile Geographic Information Systems (GIS) for Humanitarian Demining  

E-print Network

, Oaklahoma. Geosphere 4(3): 576-587. Armstrong, M.P. and Bennett, D.A. 2005. A Manifesto on mobile computing in geographic education." The Professional Geographer 57(4): 506-515. Aspbury, A. and Gibson, R. 2004. Long-range visibility of greater sage... grouse leks: a GIS- based analysis. Animal Behavior 67(6): 1127-1132. Aviles, W., Ortega, O., Kuan, G., Coloma, J. and Harris, E. 2007. Integration of Information Technologies in Clinical Studies in Nicaragua. PLoS Medicine 4(10): 1578-1583. Brusco...

Dunbar, Matthew D.

2010-04-27

408

Screening for lead exposure using a geographic information system  

SciTech Connect

Screening programs for lead overexposure typically target high-risk populations by identifying regions with common risk markers (older housing, poverty, etc.). While more useful than untargeted screening programs, targeted programs are limited by the geographic resolution of the risk-factor information. A geographic information system can make screening programs more effective and more cost-efficient by mapping cases of overexposure, identifying high-incidence neighborhoods warranting screening, and validating risk-factor-based prediction rules. 5 refs., 5 figs., 2 tabs.

Wartenberg, D. (Robert Wood Johnson Medical School, Piscataway, NJ (United States))

1992-12-01

409

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

USGS Publications Warehouse

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. ?? 2006 The Society for the Study of Evolution. All rights reserved.

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

2006-01-01

410

Discovery of Spatial Association Rules in Geographic Information Databases  

Microsoft Academic Search

. Spatial data mining, i.e., discovery of interesting, implicitknowledge in spatial databases, is an important task for understandingand use of spatial data- and knowledge-bases. In this paper, an efficientmethod for mining strong spatial association rules in geographic informationdatabases is proposed and studied. A spatial association rule is arule indicating certain association relationship among a set of spatial andpossibly some nonspatial

Krzysztof Koperski; Jiawei Han

1995-01-01

411

Enquiring into Primary Teachers' Geographical Knowledge  

ERIC Educational Resources Information Center

Subject knowledge is an important component of primary teachers' repertoire, though it has not been studied widely beyond their understandings of aspects of science and mathematics. Evaluations of the quality of teachers' geographical knowledge for teaching primary geography indicate a disparity between high quality teachers and less…

Catling, Simon; Morley, Emma

2013-01-01

412

Ohio Geographers: Recent Research Themes. Volume Number 3: 1975.  

ERIC Educational Resources Information Center

Eight professional geography research papers presented at the Geography Section of the Ohio Academy of Science annual 1975 meeting are provided. The papers examine various aspects of the environment, energy distribution, cultural and geographic change, and ethnic distribution. The titles of the eight papers are (1) Racial and Ethnic Redistribution…

Harnapp, Vern, Ed.

413

Israeli Geographers in Search of a National Identity  

Microsoft Academic Search

Zionist geographers in Israel were highly involved in institutionalizing Israel's national identity. In search for interpretative schemes, they were highly committed both to Western paradigms and to Zionist narratives. Until the 1970s, organicist models of regional geography were popular despite contradictions between the use of tragic and comic narratives in Western models and the need to adopt romantic narratives for

Izhak Schnell

2004-01-01

414

Disambiguating Geographic Names in a Historical Digital Library  

E-print Network

Disambiguating Geographic Names in a Historical Digital Library David A. Smith and Gregory Crane interfaces provide natural, scalable visualizations for many digital library collections, but the wide range of data in digital libraries presents some particular problems for identifying and disam- biguating place

Smith, David A.

415

Geographic science for public and Tribal lands management  

USGS Publications Warehouse

There are more than 650 million acres of U.S. public and Tribal lands, most found west of the Mississippi River. Scientists with the U.S. Geological Survey's Western Geographic Science Center are working to increase the scientific information available for natural resource decision making, while continuing productive collaborations with Federal land managers, Tribal leaders, and local communities.

Torregrosa, Alicia

2011-01-01

416

Integrating Bayesian networks and geographic information systems: good practice examples.  

PubMed

Bayesian networks (BNs) are becoming increasingly common in problems with spatial aspects. The degree of spatial involvement may range from spatial mapping of BN outputs based on nodes in the BN that explicitly involve geographic features, to integration of different networks based on geographic information. In these situations, it is useful to consider how geographic information systems (GISs) could be used to enhance the conceptualization, quantification, and prediction of BNs. Here, we discuss some techniques that may be used to integrate GIS and BN models, with reference to some recent literature which illustrate these approaches. We then reflect on 2 case studies based on our own experience. The first involves the integration of GIS and a BN to assess the scientific factors associated with initiation of Lyngbya majuscula, a cyanobacterium that occurs in coastal waterways around the world. The 2nd case study involves the use of GISs as an aid for eliciting spatially informed expert opinion and expressing this information as prior distributions for a Bayesian model and as input into a BN. Elicitator, the prototype software package we developed for achieving this, is also briefly described. Whereas the 1st case study demonstrates a GIS-data driven specification of conditional probability tables for BNs with complete geographical coverage for all the data layers involved, the 2nd illustrates a situation in which we do not have complete coverage and we are forced to extrapolate based on expert judgement. PMID:21853520

Johnson, Sandra; Low-Choy, Sama; Mengersen, Kerrie

2012-07-01

417

Geographic multicasting in wireless ad-hoc networks  

E-print Network

This thesis proposes a new protocol for providing a location based massaging framework in wireless ad-hoc networks. In such a scheme, the destination for a message would be the set of all hosts which lie in a particular geographic domain defined...

Gopalakrishnan, Dhilip

2012-06-07

418

GEOGRAPHICAL VARIATION IN THE NESTLING COLORATION OF PARASITIC COWBIRDS  

Microsoft Academic Search

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

STEPHEN I. ROTHSTEIN

419

Mobile Geographic Education: The MoGeo System  

Microsoft Academic Search

Recent developments in technology such as mobile computing devices, global positioning systems, and wireless networks provide avenues for the development of innovative educational alternatives to traditional computer laboratory exercises. We have created a mobile geographic education (MoGeo) system that places students in the environments they are studying while retaining access to network accessible knowledge repositories and the laboratory instructor. Students

Jerry Mount; David Bennett; Marc Armstrong

420

Antioxidant activity of propolis of various geographic origins  

Microsoft Academic Search

Propolis is a resinous substance collected by honeybees from various plant sources. The antioxidant activities of propolis of various geographic origins, i.e., Argentina, Australia, Brazil, Bulgaria, Chile, China (Hebei, Hubei, and Zhejiang), Hungary, New Zealand, South Africa, Thailand, Ukraine, Uruguay, United States, and Uzbekistan were compared. Ethanol extracts of propolis (EEP) were prepared and evaluated for antioxidant activities of EEP

Shigenori Kumazawa; Tomoko Hamasaka; Tsutomu Nakayama

2004-01-01

421

Real Estate and Business Geographic Data Now On The Net  

Microsoft Academic Search

This section on data for real estate and business geographic analysis has been part of JREL for about four years. The categorization scheme was introduced in Thrall (2002), and the large annotated data compendium was published in JREL by Thrall (2001). The purpose of this section has been to provide a resource for those in our community to more efficiently

Grant Ian Thrall

422

Geographic Profile of Employment and Unemployment, 1974 (and Supplement).  

ERIC Educational Resources Information Center

Geographic labor force data from the 1974 Current Population Survey (CPS) is presented and provides annual unemployment, demographic, and occupational estimates for large States and metropolitan areas. Section One contains the 1974 total unemployment estimates for 27 large States and 30 large metropolitan areas, with two tables. These estimates…

Bureau of Labor Statistics (DOL), Washington, DC.

423

Spatial Modeling of Geographic Patterns in Biodiversity and Biofuel Production  

E-print Network

Spatial Modeling of Geographic Patterns in Biodiversity and Biofuel Production How can the US of biodiversity. The future of the biofuel industry will depend on public investment and trust that industry for increasing biofuel production have already come under fire because of real and perceived threats

424

The geographic selection mosaic for squirrels, crossbills and Aleppo pine.  

PubMed

The interactions between many species are structured in a geographic mosaic of populations among which selection is divergent. Here we tested the hypothesis that such a geographic selection mosaic arises for common crossbills (Loxia curvirostra) feeding on seeds in the cones of Aleppo pine (Pinus halepensis) because of geographic variation in the occurrence of European red squirrels (Sciurus vulgaris). On the Iberian Peninsula, Sciurus exerted directional selection favouring larger cones with larger scales, which has caused cones there to be larger than in the Balearic Islands where Sciurus are absent. Moreover, cones on the Iberian Peninsula are so large that they are apparently little used by the relatively small-billed crossbills on the Peninsula; selection by Sciurus seems to have made the cones so difficult to feed on that crossbills rely mostly on the seeds of other conifers. Where crossbills are present but Sciurus are absent (Mallorca Island), cones were smaller as a result of relaxation of selection by Sciurus. However, cones on Mallorca had proportionally thicker scales in comparison to where both Sciurus and crossbills are absent (Ibiza Island), presumably as an adaptation against crossbill predation. Here crossbills specialize on Aleppo pine, have relatively large bills and have apparently coevolved in an arms race with Aleppo pine. These results suggest that Sciurus has influenced both the geographic selection mosaics for crossbills and conifers and the adaptive radiation of crossbills in Eurasia much like Tamiasciurus has done in the North America. PMID:15715841

Mezquida, E T; Benkman, C W

2005-03-01

425

Geographic Constraint Mobility Model for Ad Hoc Network  

Microsoft Academic Search

In this paper, we propose a mobility model and present its simulation tool to generate realistic mobility traces for mobile ad hoc network. The mobility model is capable of creating realistic node movement pattern in the presence of geographic constraints by exploiting the concepts of anchors. The model dynamically places anchors depending upon the context of the environment through which

Sabbir Ahmed; Gour C. Karmakar; Joarder Kamruzzaman

2008-01-01

426

Forum: Geography and Geographical Education in New South Wales, Australia  

ERIC Educational Resources Information Center

In New South Wales Geography is frequently perceived in an outdated and inaccurate fashion. Geographers' perceptions of their discipline usually contrasts with those of fellow educators, parents, employers, politicians and even their own students. It is suggested that for the public and students to better understand what is required to become a…

Bliss, Susan

2006-01-01

427

Calibration of a spatial simulation model with volunteered geographical information  

Microsoft Academic Search

For many scientific disciplines, the continued progression of information technology has increased the availability of data, computation and analytical methodologies including simulation and visualisation. Geographical information science is no exception. In this article, we investigate the possibilities for deployment of e-infrastructures to inform spatial planning, analysis and policy-making. We describe an existing architecture that feeds both static and dynamic simulation

Mark Birkin; Nick Malleson; Andy Hudson-Smith; Steven Gray; Richard Milton

2011-01-01

428

Improving MANET Data Communication in Large Geographic Areas  

E-print Network

Improving MANET Data Communication in Large Geographic Areas Leslie Fife Brigham Young University ggruenwald@ou.edu Abstract - A Mobile Ad-Hoc Network (MANET) is a group of wireless, mobile, battery be provided in a MANET: data broadcast, data query, and peer-to-peer messaging. Previously, the TriM data

Gruenwald, Le

429

Self-Teaching Student's Manual for Geographic Information Systems (GIS).  

ERIC Educational Resources Information Center

This paper is a report of a project that was undertaken to produce a self-teaching manual for students wishing to acquire technical skills in Geographic Information Systems (GIS). Such skills are required in the analysis of locational data such as those found in aerial photographs, satellite images and digital maps. The self-teaching manual…

Cho, George

430

Inference of human geographic origins using Alu insertion polymorphisms  

E-print Network

the geographic origin of the Louisiana serial killer in 2003 (www.dnaprint.com). Although emerging SNP 60608, USA d Biology and Biotechnology Research Program, Lawrence Livermore National, Laboratory, PO Box to genotype using a variety of approaches. Herein, we present results of a blind study using 100 Alu insertion

Ray, David

431

Herpetological Review 44(2), 2013 272 GEOGRAPHIC DISTRIBUTION  

E-print Network

MARGINATA (Midland Painted Turtle) USA: MICHIGAN: CHARLEVOIX CO.: Southwest end of Hog Island, Eastern LakeHerpetological Review 44(2), 2013 272 GEOGRAPHIC DISTRIBUTION TESTUDINES TURTLES CHRYSEMYS PICTA for Hog Island (Bowen and Gillingham 2004. Michigan Acad. 35:213­223). Turtle shell was found in a coastal

Feldman, Chris R

432

A Rapid Method for Detecting Geographically Disconnected Areas after Disasters  

E-print Network

of radiation from the damaged Fukushima nuclear plant). Appropriate disaster response strategiesA Rapid Method for Detecting Geographically Disconnected Areas after Disasters Ling-Jyh Chen1, Chia-made disaster. IFI is comprised of two components: 1) the Active Network Probing (ANP) module, which proactively

Chen, Ling-Jyh

433

A Geographical History of Online Rhetoric and Composition Journals  

ERIC Educational Resources Information Center

The "Mapping Digital Technology in Rhetoric and Composition History" project can accommodate the geographical aspects of many relevant potential data sets, such as the locations of conferences, grant and award winners, book publications, graduate programs, job openings, and blog posts. The maps created for this article focus specifically on online…

Tirrell, Jeremy

2012-01-01

434

Local Environmental Groups: A Systematic Enumeration in Two Geographical Areas  

Microsoft Academic Search

Local environmental groups, although acknowledged increas- ingly since the mid-1980s, have not been sampled systematically, have been reported to consist of only a few types, and are often considered to be of only minor political significance. In this study we systematically invento- ried all local environmental groups in two U.S. geographical areas: the Delmarva Peninsula and the state of North

Willett Kempton; Dorothy C. Holland; Katherine Bunting-Howarth; Erin Hannan; Christopher Payne

2001-01-01

435

Time and Practice: Learning to Become a Geographer  

ERIC Educational Resources Information Center

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…

Downs, Roger M.

2014-01-01

436

ORIGINAL PAPER Geographical variation in host plant utilization  

E-print Network

ORIGINAL PAPER Geographical variation in host plant utilization in the comma butterfly: the roles permitting fast development. To test this hypothesis, populations of the polyphagous comma butterfly (Nymphalidae: Polygonia c-album) from five European areas (localities in Norway, Sweden, England, Belgium

Nylin, Sören

437

Conceptualizing the Impact of Geographical Ignorance on Online Trip Planning  

Microsoft Academic Search

In this study, 28 participants with little geographical knowledge of the destination were asked to plan a week-long trip to China online. The participants were asked to create a detailed seven-day itinerary outline with activities or attractions they would like to participate in or visit, as well as restaurants in which they would like to dine. The participants were given

Wayne W. Smith; Bing Pan; Xiang Li; Grace Zhang

2009-01-01

438

2. VIEW LOOKING EAST AT STEPS AND LAND WALL (GEOGRAPHIC ...  

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

2. VIEW LOOKING EAST AT STEPS AND LAND WALL (GEOGRAPHIC CENTER OF THE LOCK COMPLEX), FROM THE OHIO RIVER. - Ohio Slack Water Dams, Lock & Dam No. 4, East bank of Ohio River at mile point 18.6, along State Route 65, Ambridge, Beaver County, PA

439

GEOGRAPHY 200B: GEOGRAPHICAL THOUGHT, RESEARCH, AND PROFESSIONAL DEVELOPMENT  

E-print Network

1 GEOGRAPHY 200B: GEOGRAPHICAL THOUGHT, RESEARCH, AND PROFESSIONAL DEVELOPMENT image source: www eventual components of a written proposal. THEME 2 GEOGRAPHY AS A PROFESSIONAL DISCIPLINE 1. Describe four prominent domains: geography as place, geography as space, geography as changes on the face

Lopez-Carr, David

440

GEOGRAPHY 200B: GEOGRAPHICAL THOUGHT, RESEARCH, AND PROFESSIONAL DEVELOPMENT  

E-print Network

GEOGRAPHY 200B: GEOGRAPHICAL THOUGHT, RESEARCH, AND PROFESSIONAL DEVELOPMENT Winter 2011 Class thought with the formation of Geography as a discipline and its contemporary practice at UCSB: geography as place, geography as space, geography as changes on the face of the earth, and geography

Lopez-Carr, David

441

Why geography? Geographers study the earth's landscapes, people and  

E-print Network

Why geography? Geographers study the earth's landscapes, people and environment, and bridge the social sciences (human geography) and natural sciences (physical geography). Focused on key global issues such as climate change, economic and cultural diversity and international migration, geography is concerned

Sussex, University of

442

Recommendation of shopping places based on social and geographical influences  

E-print Network

.bothorel@telecom-bretagne.eu ABSTRACT The project tackled in this article is a shopping recommender system that aims at providing, selection process. General Terms Algorithms, Performance. Keywords Social shopping; recommender systemsRecommendation of shopping places based on social and geographical influences Romain Picot

Jannach, Dietmar

443

Geographic variations in the composition of ivory of  

Microsoft Academic Search

Tracing the source of origin of illegal ivory will contribute to the identification of poorly managed game parks and facilitate steps taken to prevent the African elephant from becoming extinct. This study was aimed at establishing a database on the composition of ivory obtained from elephant sanctuary areas in Southern Africa. Fragments of elephant ivory from seven geographically distinct areas

E. J Raubenheimer; J. M. M Brown; D. B. K Rama; M. J Dreyer; P. D Smith; J Dauth

1998-01-01

444

TOXICS RELEASE INVENTORY - GEOGRAPHIC INFORMATION SYSTEM COVERAGE FILES  

EPA Science Inventory

Data extracted from the EPA Toxics Release Inventory (TRI) system for reporting year 1993 are written in Arc/INFO geographic information system (GIS) export file format (an ASCII data exchange format). The data are also summarized in tables out of the TRI public data release publ...

445

Collaboration range: Effects of geographical proximity on article impact  

NASA Astrophysics Data System (ADS)

Spatial scientometrics studies how geography influences knowledge creation. In the recent years there has been a surge in this kind of studies, due to the increase of international collaborations. Most of the work in this field has been focused on the geographical distribution of researchers, whilst few have considered how proximity between coauthors influences research quality. In this work we leverage a dataset of geolocalized articles to assess the effect of geographical distance on article impact. More precisely, the dataset, provided by the Observatory of Science and Technology (O.S.T.), consists of roughly 106 scientific articles, gathering all European articles written in 2000 and 2007, spanning 9 disciplines. We evaluate under which geographical extent coauthorships have higher probability of resulting in high impact articles ("high impact" is here approximated by "being in the top 10% most cited articles of its discipline"). We also describe spatial distribution of coauthorship, delineating geographical areas where the production is proportionally higher. The distribution is evaluated both in term of km (as the crow flies), and in terms of administrative partitions (authors' cities, regions, countries).

Apolloni, Andrea; Rouquier, Jean-Baptiste; Jensen, Pablo

2013-09-01

446

GEOGRAPHICAL INFORMATION SYSTEM, DECISION SUPPORT SYSTEMS, AND URBAN STORMWATER MANAGEMENT  

EPA Science Inventory

The full report reviews the application of Geographic Inforamtion System (GIS) technology to the field of urban stormwater modeling. The GIS literature is reviewed in the context of its use as a spatial database for urban stormwater modeling, integration of GIS and hydroloic time...

447

Geographic Dissection of the Twitter Network Juhi Kulshrestha Farshad Kooti  

E-print Network

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

Gummadi, Krishna P.

448

Distance Education in Geographic Information Science: Symposium and  

E-print Network

Distance Education in Geographic Information Science: Symposium and an Informal Survey DAWN J for Education Statistics (NCES, 2002) defines distance education as "education or training courses delivered with unprecedented economic challenges faced by higher education institutions, have led to rapid growth in distance

Wright, Dawn Jeannine

449

Geographic Education: An Investment in Your Students' Future.  

ERIC Educational Resources Information Center

This speech bemoans the deplorable state of geography education in the United States. American students' geographical knowledge is far inferior to that of European, Russian, Japanese, Canadian, or Australian students. This nation's young people literally do not know where they are, what other cultures are like, or how things fit together. A recent…

Grosvenor, Gilbert M.

450

Geographic and Monthly Variation in Composition of Oysters,  

E-print Network

Geographic and Monthly Variation in Composition of Oysters, Crassostrea virginica VIRGINIA D oyster meats reported by certain investigators revealed little apparent consistency. Cholesterol levels reported in the literature ranged from 37 mg (Thompson, (964) to 470 mg (Okey, 1945) per 100 g of oyster

451

CONTINGENCY PLANNING WITH AERIAL PHOTOGRAPHY AND GEOGRAPHIC INFORMATION SYSTEMS  

EPA Science Inventory

The incident at the 3 Mile Island Nuclear Plant has led to many changes in the operation and employee training in U.S. Nuclear Power Industry. This paper presents an approach to the preparation of a comprehensive geographic information system that would meet the needs for monitor...

452

Geographical scale effects on the analysis of leptospirosis determinants.  

PubMed

Leptospirosis displays a great diversity of routes of exposure, reservoirs, etiologic agents, and clinical symptoms. It occurs almost worldwide but its pattern of transmission varies depending where it happens. Climate change may increase the number of cases, especially in developing countries, like Brazil. Spatial analysis studies of leptospirosis have highlighted the importance of socioeconomic and environmental context. Hence, the choice of the geographical scale and unit of analysis used in the studies is pivotal, because it restricts the indicators available for the analysis and may bias the results. In this study, we evaluated which environmental and socioeconomic factors, typically used to characterize the risks of leptospirosis transmission, are more relevant at different geographical scales (i.e., regional, municipal, and local). Geographic Information Systems were used for data analysis. Correlations between leptospirosis incidence and several socioeconomic and environmental indicators were calculated at different geographical scales. At the regional scale, the strongest correlations were observed between leptospirosis incidence and the amount of people living in slums, or the percent of the area densely urbanized. At the municipal scale, there were no significant correlations. At the local level, the percent of the area prone to flooding best correlated with leptospirosis incidence. PMID:25310536

Gracie, Renata; Barcellos, Christovam; Magalhães, Mônica; Souza-Santos, Reinaldo; Barrocas, Paulo Rubens Guimarães

2014-01-01

453

Fuel Cell Backup Power Geographical Visualization Map (Fact Sheet)  

SciTech Connect

This NREL Hydrogen and Fuel Cell Technical Highlight describes a time-lapse geographical visualization map of early market use of fuel cells for telecommunications backup power. The map synthesizes data being analyzed by NREL's Technology Validation team for the U.S. Department of Energy (DOE) Fuel Cell Technologies Program with DOE's publicly available annual summaries of electric disturbance events.

Not Available

2012-12-01

454

Contemporary concerns in Geographical\\/Geospatial Information Systems (GIS) processing  

Microsoft Academic Search

With the advent of advances in Geospatial Information Systems (GIS); there is a need to determine the areas of research and new tools available for GIS systems. GIS consists of the collection, integration, storage, exploitation, and visualization of geographic and contextual data and spatial information. Future GIS needs, techniques, models, and standards should be shared openly among developers for future

Erik P. Blasch; Matthew Pellechia; Paul B. Deignan; Kannappan Palaniappan; Shiloh L. Dockstader; Gunasekaran Seetharaman

2011-01-01

455

Where and Why There? Spatial Thinking with Geographic Information Systems  

ERIC Educational Resources Information Center

The authors developed and implemented a project for high school geography students that modeled the processes in a site selection analysis using Geographic Information Systems (GIS). They sought to explore how spatial thinking could be fostered by using the MyWorld GIS software that was designed specifically for educational uses. The task posed…

Milson, Andrew J.; Curtis, Mary D.

2009-01-01

456

Geographic information systems at the Goddard Space Flight Center  

NASA Technical Reports Server (NTRS)

The basic functions of a Geographic Information System (GIS) and the different ways that a GIS may be implemented are described. It surveys that GIS software packages that are currently in operation at the Goddard Space Flight Center and discusses the types of applications for which they are best suited. Future plans for in-house GIS research and development are outlined.

Goldberg, M.

1982-01-01

457

Technology and geographical imaginations: representing aviation in 1930s Italy  

Microsoft Academic Search

This paper examines the geographical imaginations associated with aviation in fascist Italy, focusing on the representation of flight on the one hand, and on the other hand the role of propaganda flights organized by the regime in the 1930s. The representation and use of aviation in interwar Italy is explored in light of the concept of technological legitimation, based on

Federico Caprotti

2008-01-01

458

Adaptive basis of geographic variation: genetic, phenotypic and environmental  

E-print Network

Adaptive basis of geographic variation: genetic, phenotypic and environmental differences among a novel habitat. A classical example of adaptation is the pale colour of beach mice, relative at other genetic loci. Together, these results suggest that natural selection for camouflage--via changes

Hoekstra, Hopi E.

459

Participatory Approaches and Geographical Information Systems (PAGIS) in Tourism Planning  

Microsoft Academic Search

Tourism researchers and planners continue to grapple with the problem of how to achieve more sustainable forms of tourism development; community participation and stakeholder interaction are increasingly seen as central to achieving desired outcomes. This paper explores how participatory approaches (PA) and geographical information systems (GIS) – PAGIS – can be blended to provide a framework that can facilitate a

Julia C. Hasse; Simon Milne

2005-01-01

460

2011 Asian Geographic Trend Report for GMAT[R] Examinees  

ERIC Educational Resources Information Center

The Asian Geographic Trend Report presents trends in the student pipeline for graduate management education. Examination of data collected from respondents taking the Graduate Management Admission Test[R] (GMAT[R]) during the 2007 and 2011 testing years (TY) and from the requested destination of their score reports forms the basis of this report.…

Graduate Management Admission Council, 2012

2012-01-01

461

2011 World Geographic Trend Report for GMAT[R] Examinees  

ERIC Educational Resources Information Center

The World Geographic Trend Report presents trends in the student pipeline for graduate management education. Examination of data collected from respondents taking the Graduate Management Admission Test[R](GMAT[R]) during the 2007 and 2011 testing years (TY) and from the destination of their score reports forms the basis for this report. The GMAT…

Graduate Management Admission Council, 2012

2012-01-01

462

GIDEON: a comprehensive Web-based resource for geographic medicine  

Microsoft Academic Search

GIDEON (Global Infectious Diseases and Epidemiology Network) is a web-based computer program designed for decision support and informatics in the field of Geographic Medicine. The first of four interactive modules generates a ranked differential diagnosis based on patient signs, symptoms, exposure history and country of disease acquisition. Additional options include syndromic disease surveillance capability and simulation of bioterrorism scenarios. The

Stephen A Berger

2005-01-01

463

The Level of Realizing Geographical Skills in Geography Lessons  

ERIC Educational Resources Information Center

Learning geography for an individual starts with the relationship between human and location. This relationship develops depending on gaining some skills which are necessary for understanding and using the geographical location as effective as possible. One of the main goals of high school geography education is to enable individuals to gain…

Unlu, Mehmet

2011-01-01

464

Geographic Constraints on Knowledge Diffusion: Political Borders vs. Spatial Proximity  

E-print Network

Geographic Constraints on Knowledge Diffusion: Political Borders vs. Spatial Proximity Jasjit Singh-based sampling in order to estimate the likelihood of citation between random patents. We find borders both role for political borders than for spatial proximity per se. The state border effect, although robust

Sekhon, Jasjeet S.

465

Disambiguating Geographic Names in a Historical Digital Library  

Microsoft Academic Search

Geographic interfaces provide natural, scalable visualizations for many digital library collections, but the wide range of data in digital libraries presents some particular problems for identifying and disam- biguating place names. We describe the toponym-disambiguation sys- tem in the Perseus digital library and evaluate its performance. Name categorization varies signicantly among dierent types of documents, but toponym disambiguation performs at

David A. Smith; Gregory Crane

2001-01-01

466

Geographical Indications: The Economics of Claw-Back  

Microsoft Academic Search

Geographical Indications (GIs) for products (Basmati rice, Champagne sparkling wine, Antigua coffee, etc.) were regulated at the international level in 1995 (WTO TRIPS Agreement, Part II, Section 3). This paper proposes a model on the welfare effects of the socalled “claw-back” of GIs; i.e. the protection in a country (Home) of a GI of another country (Foreign), when the said

Daniela Benavente

2010-01-01

467

Travel, Tourism, and Geographic Field Work: Project Marco Polo 1992  

Microsoft Academic Search

Travel is an important part of every geographer's life. This essay uses the concept of a life list as developed by Salter and Meserve to examine the impact of several landscapes in Egypt and Greece had on two members of the 1992 NGS Marco Polo expedition. The differences between travel and tourism are sketched, as is the potential of using

David A. Lanegran; Patrice H. St. Peter

1993-01-01

468

Breaking Stereotypes: Constructing Geographic Literacy and Cultural Awareness through Technology  

ERIC Educational Resources Information Center

Youths in the United States are less geographically and culturally literate than are youths in many other industrialized countries. In an time in which the world is becoming increasingly interconnected, it is pertinent that American youths study geography, evaluate stereotypes, and understand how individuals are perceived by others. The authors…

Carano, Kenneth T.; Berson, Michael J.

2007-01-01

469

Geographic variation in the yellow-billed cuckoo  

USGS Publications Warehouse

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.

Banks, R.C.

1988-01-01

470

Service-Learning: Critical Traditions and Geographic Pedagogy  

ERIC Educational Resources Information Center

The rise of service-learning in higher education has been critiqued as little more than community service that encourages students to "do good," but fails to generate original scholarship or social change. In this article, we argue that service-learning gives geographers the opportunity to challenge these critiques, by demonstrating the practical…

Grabbatin, Brian; Fickey, Amanda

2012-01-01

471

Geographic Variation in Somatic Growth of Redside Shiner  

Microsoft Academic Search

The geographic variation in growth rate and resulting body size is poorly known for most fish species. In this paper, we used data derived from otoliths to describe patterns of growth in redside shiners Richardsonius balteatus from seven native populations across the southern portion of its range, and we compare growth with latitude, elevation, and growing season to determine which

Derek D. Houston; Mark C. Belk

2006-01-01

472

GEOGRAPHIC INFORMATION SYSTEMS CENTER FOR ENVIRONMENTAL MANAGEMENT OF MILITARY LANDS  

E-print Network

GEOGRAPHIC INFORMATION SYSTEMS CENTER FOR ENVIRONMENTAL MANAGEMENT OF MILITARY LANDS CEMML | 1490 and efficient decision making, planning, and management of military training lands. GIS provides a spatial be customized for an installation to incorporate its military mission objectives, address operational scheduling

473

47 CFR 69.707 - Geographic scope of petition.  

Code of Federal Regulations, 2011 CFR

...CONTINUED) ACCESS CHARGES Pricing Flexibility § 69.707 Geographic scope of petition...cap LEC filing a petition for pricing flexibility in an MSA shall include data sufficient...A price cap LEC may request pricing flexibility for two or more MSAs in a single...

2011-10-01

474

47 CFR 69.707 - Geographic scope of petition.  

Code of Federal Regulations, 2012 CFR

...CONTINUED) ACCESS CHARGES Pricing Flexibility § 69.707 Geographic scope of petition...cap LEC filing a petition for pricing flexibility in an MSA shall include data sufficient...A price cap LEC may request pricing flexibility for two or more MSAs in a single...

2012-10-01

475

47 CFR 69.707 - Geographic scope of petition.  

Code of Federal Regulations, 2013 CFR

...CONTINUED) ACCESS CHARGES Pricing Flexibility § 69.707 Geographic scope of petition...cap LEC filing a petition for pricing flexibility in an MSA shall include data sufficient...A price cap LEC may request pricing flexibility for two or more MSAs in a single...

2013-10-01

476

47 CFR 69.707 - Geographic scope of petition.  

Code of Federal Regulations, 2010 CFR

...CONTINUED) ACCESS CHARGES Pricing Flexibility § 69.707 Geographic scope of petition...cap LEC filing a petition for pricing flexibility in an MSA shall include data sufficient...A price cap LEC may request pricing flexibility for two or more MSAs in a single...

2010-10-01

477

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...

478

A scalable location service for geographic ad hoc routing  

Microsoft Academic Search

GLS is a new distributed location service which tracks mobile node locations. GLS combined with geographic forwarding allows the construction of ad hoc mobile networks that scale to a larger number of nodes than possible with previous work. GLS is decentralized and runs on the mobile nodes themselves, requiring no fixed infrastructure. Each mobile node periodically updates a small set

Jinyang Li; John Jannotti; Douglas S. J. De Couto; David R. Karger; Robert Morris

2000-01-01

479

GEOGRAPHIC VARIATION IN ONTOGENY OF THE FOX SPARROW  

Microsoft Academic Search

Abstract. Ontogeny of two morphologically differentiated populations of Fox Sparrows (PassereNa iliaca) was compared,to reveal the developmental bases of adult morphological differences. Growth of tarsus, wing, bill, and tail length relative to body mass was compared between the two populations to determine if geographic variation in adults results from different relative growth rates or different relative timings of onset and

Kevin J. Burns

480

Assessing geographic coverage of the essential air service program  

Microsoft Academic Search

Essential air service (EAS) is a federally funded program that helps provide commercial air transport service from smaller, geographically remote communities in the United States. While critics of this program frequently cite the underutilization of EAS connections as being an indicator of wasteful public spending, recent studies suggest that the spatial configuration of EAS subsidized airports may also contribute to

Tony H. Grubesic; Timothy C. Matisziw; Alan T. Murray

2012-01-01

481

WIND: an Interaction Lightweight Programming Model for Geographical Web Applications  

E-print Network

interactions between textual, map and calendar components. We present the core concepts of WIND (event of geographical information avoiding any programmer intervention. In this article, we report on Web Interaction components; it also combines Web Mapping Services, etc.). WIND is fully executable (thanks to the WIND Java

Boyer, Edmond

482

Communities of Berteroa incana in Europe and their geographical differentiation  

Microsoft Academic Search

Two geographical races have been established within the Berteroetum incanae in Europe. The Galium mollugo race of the Berteroetum incanae is characteristic of the western part of the distribution area of the association whereas the relevés from the eastern part of Europe are classified as the Acosta rhenana race of the Berteroetum incanae. Adventitious Berteroetum incanae from the Netherlands has

L. Mucina; D. Brandes

1985-01-01

483

Connecting the dots: assessing the accuracy of geographic profiling software  

Microsoft Academic Search

Purpose – The purpose of this paper is to conduct an independent analysis of all existing geographic profiling software packages to determine if any one is more accurate than the others or if any of the software systems are any more accurate than simple spatial distribution strategies at locating the home base of serial offenders. Design\\/methodology\\/approach – An analysis was

Derek J. Paulsen

2006-01-01

484

Exploring Probabilistic Toponym Resolution for Geographical Information Retrieval  

Microsoft Academic Search

A key problem that arises when unstructured text is being queried is that of properly recognizing and exploiting geographical terms and entities. Here we describe a mechanism for probabilistic toponym resolution, and our experiments with the new method in the setting of the 2005 GeoCLEF queries and judgments. The new method gives improved retrieval effectiveness on a subset of the

Yi Li; Alistair Moffat; Nicola Stokes; Lawrence Cavedon

2006-01-01

485

The Productivity of Geographical Authors: A Case Study from Nigeria  

ERIC Educational Resources Information Center

Identifies 621 authors who contributed 1,423 periodical articles and monographs to the geographical literature on Nigeria between 1901 and 1970. Fifty-three core authors had six or more publications each and contributed 38 percent of all items. Results have significance for comprehensive bibliographical searches. (LS)

Aiyepeku, Wilson O.

1976-01-01

486

Savannah River Site Geographic Information System management plan  

Microsoft Academic Search

A plan for managing the development of Geographic Information System (GIS) applications at the Savannah River Site (SRS) in a coordinated, integrated fashion has been developed. Included in the plan are discussions on the guidance for GIS activities at the site, the overall strategy for managing GIS applications development, the specific administrative and programmatic tasks with projected completion schedules, and

1992-01-01

487

Comments on selecting a geographic information system for environmental management  

Microsoft Academic Search

Many organizations in environmental fields stand to benefit from the use of a geographic information system (GIS). Selecting a GIS to implement within an organization can be a difficult task that is often required of people with little experience using a GIS. A framework for evaluating competing GIS considers cost, functionality, ease of use, future stability, development potential, support availability,

Curtis E. Woodcock; Chi Ho Sham; Barbara Shaw

1990-01-01

488

GEOGRAPHIC INFORMATION SYSTEM FOR CUSTOMER INFORMATION SYSTEM IN TELECOMMUNICATION  

Microsoft Academic Search

The use of Geographical Information System (GIS) is be ing grown dramatically. It is now a commonplace for business also. For example in telecommunication business, in which reachable customer until the availability of services are the key factor for getting success in this business. As a result of this attribute information without spatial information for customer in Customer Information System

Ferry Ledi Tjandra; Akihiko Kondoh

489

Selecting the Content of Textual Descriptions of Geographically Located  

E-print Network

2003a], has been applied to produce summaries of time series data in the weather, gas turbine for winter road maintenance application. Modern weather forecasting is largely guided by numerical weather weather parameters (such as road surface tempera- ture and wind speed) for several thousand geographical

Reiter, Ehud

490

Curriculum Development: Producing Geographers for the 21st Century  

Microsoft Academic Search

We take a fresh look at geography curricula and their appropriateness to the demands of the 21st century. We reflect on the purpose, content and relevance of undergraduate geography curricula in an age of ‘supercomplexity’. Geography curricula, by their nature, are varied and multiple, with different countries often privileging different types of geographical knowledge and skills. The paper emerges from

W. Brian Whalley; Angharad Saunders; Robin A. Lewis; Michaela Buenemann; Paul C. Sutton

2011-01-01

491

Vietnamese Diasporic Placemaking: An Ethnographic Moment in Uneven Geographic Development  

ERIC Educational Resources Information Center

The article explores the ways "uneven geographical development" conditions and is conditioned by local placemaking practices. Guided by David Harvey's work along with Henri Lefebvre's three dimensions of spatial production--spatial practices, representations of space, and spaces of representation or the "spatial imaginary"--I look at the ways a…

Nguyen, Thu Su'o'ng Thi

2010-01-01

492

Integrating Fields and Objects in Geographic Information Science Antony Galton  

E-print Network

Integrating Fields and Objects in Geographic Information Science Antony Galton School of objects comes naturally to us because our language and our technical analytical tools are highly object. First, it would be incorrect to view the relationship between fields and objects as an equal partnership

Bennett, Brandon

493

Unsettling Geographical Horizons: Exploring Premodern and Non-European Imperialism  

Microsoft Academic Search

A critical genealogy of the emerging subfield of postcolonial geography illustrates how human geography has become historically shortsighted. Postcolonial geography interrogates the significance of imperialism and colonialism for disciplinary and material geographies, though its reference points, like those of most other geographical subfields, have been almost exclusively modern (c.1500–present). The marginalization of premodern imperialism rests upon the argument, or more

Richard Phillips; Rhys Jones

2005-01-01

494

Geographical Scale Effects on the Analysis of Leptospirosis Determinants  

PubMed Central

Leptospirosis displays a great diversity of routes of exposure, reservoirs, etiologic agents, and clinical symptoms. It occurs almost worldwide but its pattern of transmission varies depending where it happens. Climate change may increase the number of cases, especially in developing countries, like Brazil. Spatial analysis studies of leptospirosis have highlighted the importance of socioeconomic and environmental context. Hence, the choice of the geographical scale and unit of analysis used in the studies is pivotal, because it restricts the indicators available for the analysis and may bias the results. In this study, we evaluated which environmental and socioeconomic factors, typically used to characterize the risks of leptospirosis transmission, are more relevant at different geographical scales (i.e., regional, municipal, and local). Geographic Information Systems were used for data analysis. Correlations between leptospirosis incidence and several socioeconomic and environmental indicators were calculated at different geographical scales. At the regional scale, the strongest correlations were observed between leptospirosis incidence and the amount of people living in slums, or the percent of the area densely urbanized. At the municipal scale, there were no significant correlations. At the local level, the percent of the area prone to flooding best correlated with leptospirosis incidence. PMID:25310536

Gracie, Renata; Barcellos, Christovam; Magalhaes, Monica; Souza-Santos, Reinaldo; Barrocas, Paulo Rubens Guimaraes

2014-01-01

495

Geographical practice and its significance in Peter the Great's Russia  

Microsoft Academic Search

Using a broad and practical definition of the term “geography”, the paper examines various kinds of geographical endeavour in the Russia of Peter the Great and suggests the significance of that endeavour for Peter's policies of radical reform. Peter's reign (1682–1725) stands as a key period in Russian history, marking the end of a transition for the Russian state from

Denis J. B. Shaw

1996-01-01

496

Multimodal Geographic Information Systems: Adding Haptic and Auditory Display.  

ERIC Educational Resources Information Center

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.…

Jeong, Wooseob; Gluck, Myke

2003-01-01

497

An alien in an archipelago: Spathodea campanulata and the geographic  

E-print Network

ORIGINAL ARTICLE An alien in an archipelago: Spathodea campanulata and the geographic variability-mail: darrenbito@datec.net.pg ABSTRACT Aim This analysis of moth (Lepidoptera) communities colonizing an alien tree and rearing of caterpillars from the alien host Spathodea campanulata (Bignoniaceae). It examines

498

A geographic cline induced by negative frequency-dependent selection  

PubMed Central

Background Establishment of geographic morph frequency clines is difficult to explain in organisms with limited gene flow. Balancing selection, such as negative frequency-dependent selection (NFDS), is instead suggested to establish a morph frequency cline on a geographic scale at least theoretically. Here we tested whether a large-scale smooth cline in morph frequency is established by NFDS in the female-dimorphic damselfly, Ischnura senegalensis, where andromorphs and gynomorphs are maintained by NFDS. Results We found a large-scale latitudinal cline in the morph frequency: andromorph frequency ranged from 0.05 (South) to 0.79 (North). Based on the empirical data on the numbers of eggs, the number of ovariole, abdomen length and latitude, the potential fitness of andromorphs was estimated to be lower than that of gynomorphs in the south, and higher in the north, suggesting the gene-by-environment interaction. From the morph-specific latitudinal cline in potential fitness, the frequency of andromorphs was expected to shift from 0 to 1 without NFDS, because a morph with higher potential fitness wins completely and the two morphs will switch at some point. In contrast, NFDS led to the coexistence of two morphs with different potential fitness in a certain geographic range along latitude due to rare morph advantage, and resulted in a smooth geographic cline of morph frequency. Conclusion Our results provide suggestive evidence that the combination of NFDS and gene-by-environment interaction, i.e., multi-selection pressure on color morphs, can explain the geographic cline in morph frequency in the current system. PMID:21917171

2011-01-01

499

[Urban construction, professions, and immigration at the origin of urban studies in Venezuela, 1870-1957].  

PubMed

The individuals and circumstances involved in the creation of the first graduate urban studies program in Venezuela are recalled, beginning with the odernization of Caracas under the impulse of President Antonio Guzman Blanco, elected in 1870. Guzman Blanco converted himself into Venezuela's first urbanist with the establishment of organizational frameworks and completion of massive public works projects, which were based largely on the urban models of the US and Europe. Engineering and public health were consolidated as the two most influential sources of professional competence for guiding urban development. By the mid-1930s, growth fueled by petroleum revenues was causing rapid urbanization, and it became apparent that trained professionals able to manage the increasingly complex tasks of urban planning were in short supply. A new surge of modernizing construction began in 1936 and led to a cooperative arrangement with a French firm, whose personnel were to be required to train Venezuelan engineers for future service in urban planning. An influx of refugees from the Spanish Civil War and the increasing influence of urban planning processes in the US were also observed. The National Commission on Urbanism was created in 1946 as a dependency of the Ministry of Planning to facilitate public administration of the development and control of cities. Throughout the period, a debate was underway on the need for a multidisciplinary approach to urban planning versus a primarily architectural or engineering approach. In 1957, some consensus was reached on the need for urban planning to be viewed as more than a speciality of architecture. A framework was developed for a graduate program in 1969 in the Central University of Venezuela. The National Commission on Urbanism was disbanded in 1957, largely because of its excessive focus on architecture to the exclusion of other disciplines relevant to the urbanization process. PMID:12321404

Martin Frechilla, J J

1996-01-01

500

Residential energy use and conservation in Venezuela: Results and implications of a household survey in Caracas  

SciTech Connect

This document presents the final report of a study of residential energy use in Caracas, the capital of Venezuela. It contains the findings of a household energy-use survey held in Caracas in 1988 and examines options for introducing energy conservation measures in the Venezuelan residential sector. Oil exports form the backbone of the Venezuelan economy. Improving energy efficiency in Venezuela will help free domestic oil resources that can be sold to the rest of the world. Energy conservation will also contribute to a faster recovery of the economy by reducing the need for major investments in new energy facilities, allowing the Venezuelan government to direct its financial investments towards other areas of development. Local environmental benefits will constitute an important additional by-product of implementing energy-efficiency policies in Venezuela. Caracas`s residential sector shows great potential for energy conservation. The sector is characterized by high saturation levels of major appliances, inefficiency of appliances available in the market, and by careless patterns of energy use. Household energy use per capita average 6.5 GJ/per year which is higher than most cities in developing countries; most of this energy is used for cooking. Electricity accounts for 41% of all energy use, while LPG and natural gas constitute the remainder. Specific options for inducing energy conservation and energy efficiency in Caracas`s residential sector include energy-pricing policies, fuel switching, particularly from electricity to gas, improving the energy performance of new appliances and customer information. To ensure the accomplishment of an energy-efficiency strategy, a concerted effort by energy users, manufacturers, utility companies, government agencies, and research institutions will be needed.

Figueroa, M.J.; Ketoff, A.; Masera, O.

1992-10-01