126,144 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
The Human Presence in Europe during the Last Glacial Period I: Human Migrations and the Changing Climate
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Restoration ecology the new frontier
No full textxvii , 381 páginas : ilustraciones , gráficos , mapasPart 1. Setting the scene: 1. Getting started / Jelte Van Andel and James Aronson. -- 2. Unifying Concepts / Jelte Van Andel, Ab P. Grootjans and James Aronson. -- 3. Environmental management and restoration in a changing climate / Richard J. Hobbs -- 4. Planning and implementing successful landscape-scale restoration / David J. Tongway and John A. Ludwig. -- Part 2. Ecological foundations. -- 5. Landscape ecology / Rudy Van Diggelen, Richard J. Hobbs and Ladislav Miko. -- 6. Ecology of ecosystems and biotic communities / Johan Van de Koppel, jelte van andel and arjen biere. -- 7. Populations: ecology and genetics / Arjen Biere, Jelte Van Andel and Johan Van de Koppel. -- 8. Reintroductions: learning from successes and failures / Sipke E. Van Wieren -- part 3. Experiences and lessons, biome by biome. -- 9. Restoration of tropical forests / Karen D. Holl. -- 10. Restoration of arid and semi-arid lands / David A. Bainbridge. -- 11. Restoration of mediterranean-type woodlands and shrublands / V. Ramón Vallejo, Edith B. Allen, James Aronson, Juli G. Pausas, Jordi Cortina and Julio R. Gutiérrez. -- 12. Restoration of temperate forests: an european approach / Anton Fischer and Holger Fischer. -- 13. Restoring temperate forests: a north american perspective / Dean Apostol and Ayn Shlisky. -- 14. Restoration of dry grasslands and heathlands / Jan P. Bakker, Rudy Van Diggelen, Renée M. Bekker and Rob H. Marrs. -- 15. Restoration of arctic-alpine ecosystems / Bernhard Krautzer, Christian Uhlig and Helmut Wittmann. -- 16. Restoration of mires / Ab P. Grootjans, Rudy Van Diggelen, Hans Joosten and Alfons J.P. Smolders. -- 17. Restoration of rivers and floodplains / Jenny Mant, Andrew B. Gill, Martin Janes and Di Hammond. -- 18. Restoration of freshwater lakes / Ramesh D. Gulati, L. Miguel Dionisio Pires and Ellen Van Donk. -- 19. Restoration of salt marshes / Jan P. Bakker -- part 4. Restoring to the future. -- 20. Biological invasions, resilience and restoration / Mirijam Gaertner, Patricia M. Holmes and David M. Richardson. -- 21. Shifting baselines: dynamics of evolution and community change in a changing world / Katharine Suding and Elizabeth Leger. -- 22. Restoration ecology and the path to sustainability / James Aronson and Jelte Van Andel
Pragmatic 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
Landsomfattende trofiundersøkelse av norske innsjøer. Biologisk klassifisering av trofinivå i ferskvann - Kan "andel blågrønnalger" brukes?
No full textEt større datamateriale samlet inn ved "Landsomfattende trofiundersøkelse av norske innsjøer" siden 1988 er analysert for å teste om relativ forekomst av blågrønnalger kan nyttes som en biologisk indikator for trofinivå i innsjøer. Faafeng og Severinsen (1994) har tidligere vist at dette kan være tilfellet for et begrenset utvalg av innsjøer, geografisk eller etter innsjøtype. De foreliggende analysene viser maksimal andel av blågrønnalger i en sesong ikke egner seg alene som tilstandsklasse for eutrofiering i innsjøer. Allerede i fosforklasse II (totalP 7-11 µgP/1) vil ofte blågrønnalgene kunne utgjøre en betydelig del av sommerplanktonet, også om en holder utenfor analysen en oligotrof art blågrønnalger: Merismopedia tenuissima. Derimot vil blågrønnalger sjelden dominere ved N/P-forhold (vekt)>100. Denne undersøkelsen bekrefter ikke kurven til Berge (1987) om skillet mellom innsjøer med og uten dominans av blågrønnalger i grunne innsjøer. Dominans av enkeltarter og artskombinasjoner av blågrønnalger kan være aktuelle trofiindikatorer. Ytterligere bearbeiding av dataene vha. multivariat statistikk anbefales
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
Appropriate 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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