125,220 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
A domesticação e a disseminação da feijoa (Acca sellowiana) do século XIX ao século XXI
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas, Programa de Pós-Graduação em História, Florianópolis, 2014.A feijoa ou goiabeira serrana (Acca sellowiana) é uma espécie frutífera nativa do planalto meridional brasileiro e do norte do Uruguai. No Brasil, a espécie se encontra principalmente nos Biomas Pampa e Mata Atlântica, mais frequentemente na fitofisionomia da Floresta Ombrófila Mista. Utilizando a metodologia da História Ambiental, a presente tese objetiva estudar o processo de domesticação, aclimatação, disseminação, os usos e a conservação da feijoa. Para alcançar tais objetivos foram utilizados diferentes tipos de fontes: relatos de viajantes, periódicos regionais, iconografia, relatórios oficiais, legislação, cartas, periódicos acadêmicos, assim também, como entrevistas. A feijoa foi introduzida e aclimatada em outros países, fora da sua área natural de ocorrência. Assim, hoje é encontrada na França, na Itália, na Rússia, na Nova Zelândia, nos Estados Unidos, em Israel e na Colômbia. Atualmente a Colômbia é o maior país exportador mundial da espécie e a Nova Zelândia, o maior produtor de subprodutos da feijoa. Durante quase todo o século XX, no Brasil, a feijoa foi pouco estudada, além de ter sofrido com o desmatamento na sua área de ocorrência natural e ameaçada pela introdução de exóticas. Com os incentivos à pesquisa, a partir da década de 1980, a fruta vem se destacando no cenário nacional, possibilitando a domesticação no seu centro de origem e diversidade e o manejo desta espécie nativa e auxiliando na conservação da floresta.Abstract : The goiabeira serrana or feijoa (Acca sellowiana) is a Brazilian southern highlands and northern Uruguay native fruit species. In Brazil, the species is found mainly in Pampa and Atlantic Forest biomes, most often in the phytophysiognomy of Araucaria Forest. Using the methodology of environmental history, this thesis aims to study the process of domestication, acclimatization, dissemination, usage and conservation of the feijoa. To achieve these objectives, different sources were used: reports of travelers, regional journals, iconography, official reports, legislation, letters, academic journals, so as interviews. The feijoa was introduced and acclimatized in other countries, outside its natural area of occurrence. Today it is found in France, Italy, Russia, New Zealand, the United States, Israel and Colombia. Currently, Colombia is the world's largest exporter of the species and New Zealand, the largest producer of feijoa products. For almost the entire twentieth century, in Brazil, the feijoa has been little studied. In addition, it has suffered from deforestation in its natural occurrence area, and threatened by the introduction of exotic plants. With research incentives from the 1980s, the fruit has been highlighted in the national scene, allowing the domestication in its center of origin and diversity and management of this native species and assisting in forest conservation
Analisi degli amminoacidi e biometria in Chamelea gallina (L.) del Golfo di Trieste durante il ciclo riproduttivo.
No full textSignificato dei fattori di rischio coronarico dell'infartuato. Fumo, diabete, obesità e stress
No full textPragmatic Case Studies as a Source of Unity in Applied Psychology
No full textTo unify or not to unify applied psychology: that is the question. In this article we review pendulum swings in the historical efforts to answer this question—from a comprehensive, positivist, “top-down,” deductive yes between the 1930s and the early 60s, to a postmodern no since then. A rationale and proposal for a limited, “bottom-up,” inductive yes in applied psychology is then presented, employing a case-based paradigm that integrates both positivist and postmodern themes and components. This paradigm is labeled “pragmatic psychology” and, its specific use of case studies, the “Pragmatic Case Study Method” (“PCS Method”). We call for the creation of peer-reviewed journal-databases of pragmatic case studies as a foundational source of unifying applied knowledge in our discipline. As one example, the potential of the PCS Method for unifying different angles of theoretical regard is illustrated in an area of applied psychology, psychotherapy, via the case of Mrs. B. The article then turns to the broader historical and epistemological arguments for the unifying nature of the PCS Method in both applied and basic psychology.Peer reviewe
Fe3+ reduction during biotite melting in graphitic metapelites: another origin of CO2 in granulites
No full textThe Fe3+/Fetot of all Fe-bearing minerals has
been analysed by Mössbauer spectroscopy in a suite of
biotite-rich to biotite-free graphitic metapelite xenoliths,
proxies of an amphibolite-granulite transition through
progressive biotite melting. Biotite contains 9 to 16%
Fe3+/Fetot, whereas garnet, cordierite and ilmenite are
virtually Fe3+ -free (0–1% Fe3+/Fetot) in all samples,
regardless of biotite presence. Under relatively reducing
conditions (graphite-bearing assemblages), biotite is the
only carrier of Fe3+ during high-temperature metamorphism;
therefore, its disappearance by melting represents
an important event of iron reduction during granulite
formation, because haplogranitic melts usually incorporate
small amounts of ferric iron. Iron reduction is
accompanied by the oxidation of carbon and the
production of CO2, according to the redox reaction:
2Fe2O3(Bt) + C(Gr) ) 4FeO(Crd;Grt;Ilm;Opx) + CO2(fluid;melt;Crd):
Depending on the nature of the peritectic Fe-Mg mineral
produced (garnet, cordierite, orthopyroxene), the CO2
can either be present as a free fluid component, or be
completely stored within melt and cordierite. The oxidation
of graphite by iron reduction can account for the
in situ generation of CO2, implying a consequential rather
than causal role of CO2 in some granulites and
migmatites. This genetic model is relevant to graphitic
rocks more generally and may explain why CO2 is
present in some granulites although it is not required for
their formation
Dr. Edwin Wright Collection: Author Unknown
No full textNotes - The author relates several short stories about his neighbours including Alex McDonell, homesteading and life around Meanook and Athabasca (1 page
From "fluid-absent" to "CO2-present" melting in graphitic metapelites: in situ CO2 generation by redox processes
No full textAppropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
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