178,208 research outputs found
Análisis histórico y estado actual de la Antropología Biológica en la Argentina
Get PDFFil: Carnese, Francisco R. Universidad de Buenos Aires. Museo Etnográfico “Juan B. Ambrosetti”; Argentina.Fil: Cocilovo, José A. Universidad Nacional del Rio Cuarto. Facultad de Ciencias Exactas, Físico-químicas y Naturales. Departamento de Ciencias Naturales; ArgentinaFil: Goicoechea, Alicia S. Universidad de Buenos Aires. Museo Etnográfico “Juan B. Ambrosetti”; Argentina.Para acceder al artículo utilice el link: http://revistascientificas.filo.uba.ar/index.php/runa/article/view/231
Análisis histórico y estado actual de la Antropología Biológica en la Argentina
Get PDFFil: Carnese, Francisco R. Universidad de Buenos Aires. Museo Etnográfico “Juan B. Ambrosetti”; Argentina.Fil: Cocilovo, José A. Universidad Nacional del Rio Cuarto. Facultad de Ciencias Exactas, Físico-químicas y Naturales. Departamento de Ciencias Naturales; ArgentinaFil: Goicoechea, Alicia S. Universidad de Buenos Aires. Museo Etnográfico “Juan B. Ambrosetti”; Argentina.Para acceder al artículo utilice el link: http://revistascientificas.filo.uba.ar/index.php/runa/article/view/231
Adaptation capacity of Boer goats to saline drinking water
No full textDue to global climatic changes, water and soil salinization is an increasing worldwide phenomenon, thus creating new threats for farm animal production. The present study was designed to investigate the adaptation capacity of goats towards sodium chloride (NaCl) in drinking water. Twelve non-pregnant Boer goats with an average body weight of 50.5 ± 9.0 kg were kept in individual pens. The study was conducted in four phases applying a two-choice preference test. In the control phase (phase 1) only fresh water was supplied in two containers. In phase 2, water with different salt concentrations (0.25%, 0.5%, 0.75%, 1.0%, 1.25% and 1.5%) was offered in one container and tap water in the other (sensitivity test). During the third phase (adaptation), goats were stepwise habituated to saline water by offering only saline water with different increasing concentrations (between 0% and 1.5% NaCl) in both containers. Subsequently, in phase 4 (sensitivity re-test) the same treatment as in phase 2 was repeated. Goats had ad libitum access to hay, water and a mineral licking block. Individual water and feed intake were recorded daily, while body weight and body condition score were measured every 2
ⁿd
week. Body weight was not affected by saline water intake, whereas dry matter intake and body condition scores decreased significantly during the experiment. Water intake was significantly (P<0.001) higher in phase 2 (sensitivity test) and phase 3 (adaptation), compared to phase 1 (control) and phase 4 (sensitivity re-test). Total sodium intake followed the same pattern. In phase 2, when goats had the choice between fresh and saline water for the first time they preferred higher salt concentrations and consumed significantly (P<0.001) higher amounts of saline water (75.4 ± 53.2 g/kg BW
⁰.⁸²
per day) than in the re-test (40.4 ± 34.0 g/kg BW
⁰.⁸²
per day) after the habituation period. Thus, salt discrimination rejection thresholds were lowered to 1.25% in phase 4 compared to 1.5% in phase 2. The results suggest that a stepwise adaptation to saline drinking water in goats is an effective method to habituate the animals to saline water intake when concentrations were below 1.5%. Goats reacted more sensitively to the salinity of drinking water after prolonged exposure to saline water indicating flexible regulation mechanisms depending on the total sodium balance of the animal
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Estudios arqueológicos en el río Desaguadero (Mendoza)
Get PDFPor medio de estudios arqueológicos desarrollados en la margen occidental del río Desaguadero, en el límite entre las provincias de Mendoza y San Luis, se indaga acerca de las características ocupacionales prehispánicas en un localizado humedal que se inserta dentro de un ambiente árido como es la llanura noreste de Mendoza.Fil: Chiavazza, Horacio. Universidad Nacional de Cuyo. Facultad de Filosofía y Letras; Argentina.Fil: Prieto, María del R. CONICET. Universidad Nacional de Cuyo; Argentina.Para acceder al artículo utilice el link: http://revistascientificas.filo.uba.ar/index.php/runa/article/view/119
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
Get PDFBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Letter from R. R. Zellick, Assistant Trust Officer, Anglo California National Bank of San Francisco, to Joseph R. Goodman, October 2, 1942
No full textLetter from R. R. Zellick, Assistant Trust Officer at The Anglo California National Bank of San Francisco, to Joseph R. Goodman, regarding property owned by Dave Tatsuno. Zellick mentions a dispute between current tenants and Tatsuno, and that Tatsuno has asked Goodman to help locate trustworthy tenants.Personal correspondence, organizational records, government documents, publications, and other papers created or collected by Joseph R. Goodman documenting the forced removal and incarceration of Japanese Americans during World War II, as well as organized resistance to incarceration. Included in the collection are records of the Japanese Young Men's Christian Association and the Japanese American Citizens' League in San Francisco, including papers of the Japanese YMCA's executive secretary Lincoln Kanai; Sakai family papers; Goodman's correspondence to and from Japanese American incarcerees, organizations opposing forced removal and incarceration of Japanese Americans, the War Relocation Authority, and others; publications, photographs, and ephemera from the Topaz Relocation Center, where Goodman taught high school; War Relocation Authority records and publications; and newspaper clippings, pamphlets, and reports about forced removal and incarceration created by various government, religious, and civic organizations, in California and nationwide
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Las manoplas de bronce del noroeste argentino prehispánico. Estudios Técnicos sobre nueve ejemplares
Get PDFFil: González, Luis R.; Departamento de Ciencias Antropológicas, Facultad de Filosofía y Letras, UBA.The so—called tensores or manoplas are a singular type of object among metals from late prehispanic Northwest Argentina. ln this paper the results of laboratory studies carried on nine samples belonging to the Ministerio de Relaciones Exteriores collections are given in advance. Such studies were orientated to establish material chemical compositions and manufacture altematives. Taking into account technical aspects, we propose that objects had a social perfonnance in which symbolic sides went beyond utilitarian ones.Los llamados tensores o manoplas constituyen un tipo singular de objeto dentro del repertorio de metales de la época prehispánica tardía del Noroeste argentino. En esta contribución se adelantan los resultados de los estudios de laboratorio efectuados sobre un conjunto de nueve ejemplares pertenecientes a las colecciones del Ministerio de Relaciones Exteriores. Tales estudios se orientaron a establecer la composición química de los materiales y las alternativas de manufactura. Considerando los aspectos técnicos, se propone que los objetos tuvieron un desempeño social en el cual las facetas simbólicas trascendieron lo utilitario.Para acceder al artículo utilice el link: http://revistascientificas.filo.uba.ar/index.php/runa/article/view/124
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