667 research outputs found
Research fronts in library and information science in Spain
No full textPublications and author cocitations in library and information science in Spain during the period from 1985 to 1994 were analyzed as a measure of the structure, specificity and composition of research fronts in this country. A cocitation matrix developed from an ad hoc database was subjected to cluster analysis, multidimensional scaling and principal components analysis, The resulting cocitation maps identified specific areas of r~search and their knowledge bases. We inferred the degree of consolidation of the discipline of library and information science, and of the subdisciplines informetrics, librarianship and university affiliation, from the research activities revealed. In this respect, the conclusions from the study show the existence of several research fronts in Spanish literature the contents of which are in most cases difficult to compare with those in other countries. A lesser degree of maturity of research in this field is shown
Structural covariance predictors of clinical improvement at 2-year follow-up in first-episode psychosis
No full textMCIN-ISCIII (PI15/00283, PI18/00805)Saiz-Masvidal, C., Contreras, F., Soriano-Mas, C., Mezquida, G., Díaz-Caneja, C.M., Vieta, E., Amoretti, S., Lobo, A., González-Pinto, A., Janssen, J., Sagué-Vilavella, M., Castro-Fornieles, J., Bergé, D., Bioque, M., Lois, N.G., Parellada, M., Bernardo, M., García-Rizo, C., González-Díaz, J.M., Pina-Camacho, L., Rodríguez-Toscano, E., Zorrilla, I., Lopez-Pena, P., De-la-Cámara, C., Modrego-Pardo, P., Escartí, M.J., Nacher, J., Vázquez, G., Cristeto, S., Valli, I., Torrent, C., Baeza, I., de la Serna, E., Menchón, J.M., Martínez-Zalacaín, I., Sáiz, P.A., González-Blanco, L., Rodriguez-Jimenez, R., Sanchez-Pastor, L., Usall, J., Butjosa, A., Pomarol-Clotet, E., Salvador, R., PEPs Grou
A Connectionist and Multivariate Approach to Science Maps: Som, Clustering and Mds Applied to Library & Information Science Research.
No full textThe visualization of scientific field structures is a classic of scientometric studies. This paper presents a domain analysis of the library and information science discipline based on author co-citation analysis (ACA) and journal cocitation analysis (JCA). The techniques used for map construction are the self-organizing map (SOM) neural
algorithm, Ward’s clustering method and multidimensional
scaling (MDS). The results of this study are compared with
similar research developed by Howard White and Katherine
McCain [1]. The methodologies used allow us to confirm that
the subject domains identified in this paper are, as well,
present in our study for the corresponding period. The appearance of studies pertaining to library science reveals
the relationship of this realm with information science.
Especially significant is the presence of the management on the journal maps. From a methodological standpoint, meanwhile, we would agree with those authors who consider
MDS, the SOM and clustering as complementary methods
that provide representations of the same reality from different analytical points of view. Even so, the MDS representation is the one offering greater possibilities for the structural representation of the clusters in a set of variables
A connectionist and multivariate approach to science maps: the SOM, clustering and MDS applied to library and information science research
No full textThe visualization of scientific field structures is a classic of scientometric studies. This paper presents a domain analysis of the library and information science discipline based on author co-citation analysis (ACA) and journal cocitation analysis (JCA). The techniques used for map construction are the self-organizing map (SOM) neural algorithm, Ward’s clustering method and multidimensional scaling (MDS). The results of this study are compared with similar research developed by Howard White and Katherine McCain [1]. The methodologies used allow us to confirm that the subject domains identified in this paper are, as well,
present in our study for the corresponding period. The appearance of studies pertaining to library science reveals the relationship of this realm with information science. Especially significant is the presence of the management on the journal maps. From a methodological standpoint, meanwhile, we would agree with those authors who consider MDS, the SOM and clustering as complementary methods that provide representations of the same reality from different analytical points of view. Even so, the MDS representation is the one offering greater possibilities for the structural representation of the clusters in a set of variables
Percentage of Lateral Pterygoid Muscle Inserted in the Disc of Human Temporomandibular Joint
No full textGaldames, IS (reprint author), Univ Talca, Ave Lircay S-N Oficina 104, Talca, Chile. Contreras, JT (Tapia Contreras, Jorge); Cantin, M (Cantin, Mario); Zavando, D (Zavando, Daniela); Galdames, IS (Suazu Galdames, Ivan)Insertion of the upper head of the lateral pterygoid (UHLP) in the temporomandibular joint disc (TMJ) has been linked to anterior displacement of the disc and temporomandibular disfunction. The aim of this study was to determine in human adults, the percentage of muscle fiber in the upper head of the lateral pterygoid muscle inserted in the articular disc. A systematic review of the literature was designed beginning with articles published in Medline, Lilacs and Scielo data bases between the years 1990 and 2010. Key words "Lateral Pterygoid Muscle" and Pterygoid Lateral Muscle" were used, and the term MeSH "Pterygoid Muscle" with Boolean OR "Lateral Ptrerygoid Muscle" AND "Insertion" and the free terms "Pterygoid Lateral Muscle Disc Articular" and "Pterygoid lateral Muscle Meniscus". Of the 156 articles obtained and analyzed, 18 articles meeting eligibility criteria were selected. Based on those articles the percentage of insertion of the CSPL in the TMJ disc was evaluated, each one was subsequently assigned a level of evidence according to OCEBM Oxford Centre Evidence Based Medicine. Only four articles answered the research inquiry, three studies were histological and one used imaging techniques with cross section slices with an adequate evidence level (1B). However, results differed with insertion percentages from 2% to 69.8% being reported in the superior head of the lateral pterygoid muscle in the articular disc
Natural history of Emerita analoga (Stimpson) (Anomura, Hippidae) in a sandy beach of Northern Chile
No full textSediment samplings were carried across the intertidal of the beach at Hornitos, northern Chile (22 degrees 26'S) during August and November 1996 and March, July and November 1997 for a study of the reproductive and population biology of Emerita analoga (Stimpson) (Decapoda, Anomura) in a region of the Chilean coast characterized by persistent upwelling. The highest abundances of E. analoga occurred during March and December 1997. During November 1996, March and December 1997, the highest abundances occurred below the effluent line, while in July 1996 and August 1997, most of the stages of E. analoga occurred in higher abundances above the effluent line. Ovigerous females were recorded over the entire study period. Juveniles were also present during all sampling months, peaking during March 1997. Body size of ovigerous females varied between 12.6 and 26.4 mm. Fecundity increased significantly with body size of females in all samples analyzed. The analyses of recruitment pattern for males and females suggest the existence of two pulses in the recruitment of E. analoga at Hornitos: one between October and December, and another one between February and March. Growth analyses show that females have growth rates a maximum body sizes higher than males. Comparisons with similar studies carried out at the coast of south central Chile (ca. 39 degreesS), a region where upwelling occurs occasionally, show that E. analoga from this region have similar growth rates but attain a greater maximum body size than in Hornitos. It is concluded that proximity to areas of persistent upwelling seems not to affect life history of E. analoga in northern Chile.PT: J; CR: ABELE LG, 1982, BIOL CRUSTACEA, V1, P241 ARNTZ WE, 1987, POPULATION COMMUNITY, P645 AVELLANAL MH, IN PRESS REPROD CYCL BERTALANFFY LV, 1938, HUM BIOL, V10, P181 BOSMAN AL, 1987, OECOLOGIA, V72, P226 BRUSCA RC, 1979, B BIOL SOC WASH, V3, P67 CONAN G, 1975, 10 EUR S MAR BIOL, V2, P129 CONTRERAS H, 1999, ESTUAR COAST SHELF S, V48, P101 COX GW, 1968, ECOLOGY, V49, P746 DIAZ H, 1983, MAR ECOL-PROG SER, V10, P203 DUGAN J, 1994, J EXPT MARINE BIOL E, V181, P225 DUGAN JE, 1991, J EXP MAR BIOL ECOL, V150, P63 DUGAN JE, 1996, REV CHIL HIST NAT, V69, P579 EFFORD IE, 1965, J ANIM ECOL, V34, P63 EMERY KO, 1938, J SEDIMENT PETROL, V8, P105 EMERY KO, 1961, LIMNOL OCEANOGR, V6, P90 FOLK R, 1980, PETROLOGY SEDIMENTAR FONSECA T, 1987, INVEST PESQ, V34, P33 FUSARO C, 1978, FISHERY B, V76, P369 GAYANILO FC, 1989, ICLARM CONTRIBUTION, V435 GAYANILO FCJ, 1996, FAO COMPUTERIZED INF, V8 GIBBS RJ, 1971, J SEDIMENT PETROL, V41, P7 HOENIG JM, 1982, STAT STUDY SEASONAL JARAMILLO E, 1987, THESIS U NEW HAMPSHI JARAMILLO E, 1993, MAR ECOL-PROG SER, V101, P105 JARAMILLO E, 1994, S AFR J ZOOL, V29, P227 JARAMILLO E, 1998, REV CHIL HIST NAT, V71, P459 JOHNSON MW, 1939, J MAR RES, V2, P236 KNOX C, 1963, B SO CALIFORNIA ACAD, V62, P45 MACGINITIE GE, 1938, AM MIDL NAT, V19, P471 MARIN V, 1993, REV CHIL HIST NAT, V66, P479 MCARDLE SB, 1992, J COASTAL RES, V8, P398 MORENO CA, 1998, MAR ECOL-PROG SER, V167, P171 OSORIO C, 1967, B MUSEO NACL HIST, V29, P60 PAULY D, 1984, FISHBYTE, V2, P21 PAULY D, 1984, PENAEID SHRIMPS THEI, P220 PAULY D, 1985, NAFO SCI COUN STUD, V9, P143 PAULY D, 1990, FISHBYTE, V8, P33 PENCHASZADEH P, 1971, I BIOL MARINA OFICIN, V6, P1 SEWARDTHOMPSON B, 1973, SEDIMENTOLOGY, V11, P83 SHORT AD, 1983, SANDY BEACHES ECOSYS, P133 SOKAL RR, 1995, BIOMETRY PRINCIPLES SOMERS IF, 1988, FISHBYTE, V6, P8 SPARRE P, 1989, FAO FISHERIES TECHNI, V306, P1 SPARRE P, 1989, FISHBYTE, V7, P23 SPARRE P, 1990, FISHBYTE, V8, P29 TARAZONA J, 1988, J MAR RES, V46, P593 TEMPLEMAN W, 1936, J BIOL BOARD CANNADI, V2, P42 VAKILY JM, 1990, THESIS CHRISTIAN ALB WOLFF M, 1989, FISHBYTE, V7, P5; NR: 50; TC: 3; J9: REV CHIL HIST NAT; PG: 11; GA: 396ZUSource type: Electronic(1
The social class struggles concept with an interdisciplinary approach: a paramount concept for research in library and information science (LIS)
No full textThis paper analyses the social class struggles concept with an interdisciplinary approach to be used by theorists and practitioners of library and information science (LIS). This concept emerged as part of the theoretical framework employed by the author in his doctoral thesis (Muela-Meza, 2010): An Application of Community Profiling to Analyse Community Information Needs, and Providers: Perceptions from the People of the Broomhall Neighbourhood of Sheffield, UK. This concept is complemented from philosophy (Marx and Engels, [1848] 1976a), and the natural sciences (Hauser, 2006; Sagan and Druyan, 1992), and it served the author to understand better the bigger dimensions of the underlying issues behind social classes and human conflicts. It also served to understand better the contradictions between people (e.g. LIS users with contradictory and mutually exclusive information needs to be provided by libraries and other institutions of information recorded in documents), and how these intensify when these are interrelated with the social class they belong to (Muela-Meza, 2007). This paper also criticises some competing views whose proponents by pretending fallaciously and deceitfully to deny the presence of social class divides in society, such as those rhetorical ploys of post-modernism that propose capitalist-class-driven ideologues of “community cohesion” based on “social capital” (Putnam, 1999). It shows evidence of how those followers (e.g. Pateman, 2006; Contreras Contreras, 2004; Bryson, Usherwood and Proctor, 2003) of capitalist-class ideologues, by doing so they aligned their discourse to that of dominance hierarchies and hegemony against working class people, in LIS and other sciences, and the humanities. It also criticises the postmodern pseudoscience because it pretends to undermine the logical rationality fundamental in LIS and all other sciences. It recommends that LIS theorists and practitioners employ the social class struggles concept as configured here in order to understand better contradictions, conflicts, and struggles within LIS theory and practice, and also to search for broader epistemological aims such as justice and wisdom (Fleissner and Hofkirchner, 1998), concealed by the capitalist or bourgeois and middle classes for their benefit against working class
The evolution of research activity in Spain. The impact of the National Commission for the Evaluation of Research Activity (CNEAI)
No full textThis article outlines the evolution of international scientific production in Spain over the last 25 years, a period characterised by steady growth in research production. The following stages in this process are identified in accordance with some of the factors that predominated at different times. From 1974 to 1982 production increased due to causes endogenous to the scientific system itself, as scientists brought their work into line with the patterns which characterised research in other industrialised countries. From 1982 to 1991 the prioritisation of R&D by government administrative bodies represented a constant stimulus, implemented through a set of legal measures, investments and the creation of posts for new researchers. From 1989 to the present the creation of the Comisión Nacional de Evaluación de la Actividad Investigadora (National Commission for the Evaluation of Research Activity, CNEAI) and the research incentive system have provided a further stimulus, which has led to the maintenance of, and an increase in, the rate of research production in spite of the net decrease in the monetary value of research grants awarded during the last period analysed. Other special characteristics of Spanish research, such as its dependence on the public sector and its essentially academic nature, are discussed
. 61 Año 21 (2014) mayo-agosto. Dimensión Antropológica
No full text- “[G]Ente es esta de que no se puede tomar entendimiento”: las cabriolas de Hernando de Soto ante Atahualpa en crónicas peruanas del XVI por Beatriz Carolina Peña. - La confrontación tlaxcalteca ante la Conquista por José Eduardo Contreras Martínez. - San Agustín victorioso: cantares y coplas de los santos ganaderos en la Tierra Caliente por Juan José Atilano Flores. - El sistema de cargos en la configuración de la clase obrera con orígenes rurales en la región de Cholula, Puebla por Guillermo Paleta Pérez. - El “voto bronca”, el ausentismo y las principales fuerzas políticas en las elecciones de 2001 en la provincia de Buenos Aires. Los casos de San Nicolás, La Matanza y General Pueyrredón por Sergio Blogna Tistuzza. - El agrarismo y la modernidad rural en Veracruz: la mirada fotográfica de Atanasio D. Vázquez (1925-1930) por Elissa J. Rashkin. - Carlos San Juan Victoria (coord.), El XX mexicano: lecturas de un siglo, México, Itaca, 2012 por Leticia Reina. - Félix Báez-Jorge, ¿Quiénes son aquí los dioses verdaderos? Religiosidad indígena y hagiografías populares, Xalapa, Universidad Veracruzana, 2013 por Isabel Lagarriga Attias. - Pilar Máynez (ed.), El mundo indígena desde la perspectiva actual. Vol. II. Aproximación multidisciplinaria, México, Grupo Destiempos (Dossiers), 2013 por Rodrigo Martínez Baracs
Effects of geostrophic kinetic energy on the distribution of mesopelagic fish larvae in the southern Gulf of California in summer/fall stratified seasons
No full textEffects of geostrophic kinetic energy flux on the three-dimensional distribution of fish larvae of mesopelagic species (Vinciguerria lucetia, Diogenichthys laternatus, Benthosema panamense and Triphoturus mexicanus) in the southern Gulf of California during summer and fall seasons of stronger stratification were analyzed. The greatest larval abundance was found at sampling stations in geostrophic kinetic energy-poor areas (<7.5 J/m3), where the distribution of the dominant species tended to be stratified. Larvae of V. lucetia (average abundance of 318 larvae/10m2) and B. panamense (174 larvae/10m2) were mostly located in and above the pycnocline (typically ∼ 40 m depth). In contrast, larvae of D. laternatus (60 larvae/10m2) were mainly located in and below the pycnocline. On the other hand, in sampling stations from geostrophic kinetic energy-rich areas (> 21 J/m3), where mesoscale eddies were present, the larvae of the dominant species had low abundance and were spread more evenly through the water column, in spite of the water column stratification. For example, in a cyclonic eddy, V. lucetia larvae (34 larvae/10m2) extended their distribution to, at least, the limit of sampling 200 m depth below the pycnocline, while D. laternatus larvae (29 larvae/10m2) were found right up to the surface, both probably as a consequence mixing and secondary circulation in the eddy. Results showed that the level of the geostrophic kinetic energy flux affects the abundance and the three-dimensional distribution of mesopelagic fish larvae during the seasons of stronger stratification, indicating that areas with low geostrophic kinetic energy may be advantageous for feeding and development of mesopelagic fish larvae because of greater water column stability. © 2016 Contreras-Catala et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
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