142,696 research outputs found
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
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
A genetic variation map for chicken with 2.8 million single-nucleotide polymorphisms
Get PDFWe describe a genetic variation map for the chicken genome containing 2.8 million single-nucleotide polymorphisms (SNPs). This map is based on a comparison of the sequences of three domestic chicken breeds (a broiler, a layer and a Chinese silkie) with that of their wild ancestor, red jungle fowl. Subsequent experiments indicate that at least 90% of the variant sites are true SNPs, and at least 70% are common SNPs that segregate in many domestic breeds. Mean nucleotide diversity is about five SNPs per kilobase for almost every possible comparison between red jungle fowl and domestic lines, between two different domestic lines, and within domestic lines--in contrast to the notion that domestic animals are highly inbred relative to their wild ancestors. In fact, most of the SNPs originated before domestication, and there is little evidence of selective sweeps for adaptive alleles on length scales greater than 100 kilobases
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
Dr. Edwin Wright Collection: Author Unknown
Get PDFNotes - The author relates several short stories about his neighbours including Alex McDonell, homesteading and life around Meanook and Athabasca (1 page
Empty verbs in Chinese predicatives and complex predicates
No full textThis paper investigates syntactic properties of verbless constructions in Chinese. Verbless constructions differ from constructions with overt verbs in three major respects. First, there is a VP-internal nominal raising in Chinese, which is optional if an overt verb shows up, and obligatory if there is no overt verb. Second, while an overt verb can select various kinds of argument, the internal argument of a verbless construction cannot be indefinite. Third, there are two types of object depictive secondary predication constructions, and only one of them allows for a null verb
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
Tsüstatiin B puudulikkusega kaasnevate neurokeemiliste ning käitumuslike muutuste uurimus Unverricht-Lundborgi tüüpi progresseruva müokloonilise epilepsia loommudelis
Get PDFThe study aimed to further characterize the neurochemical and behavioural phenotype of cystatin B deficient mice, which are the animal model of progressive myoclonus epilepsy of Unverricht–Lundborg type. Cystatin B deficiency provokes impairment in glutamatergic neuronal circuits and enhances tryptophan metabolism along kynurenine and serotonin pathways in the brain of mutant mice. Observed neurochemical alterations may contribute to the pathological mechanisms and might have a causal impact to the formation of neurological phenotype seen in diseased humans.
Käesolevas uurimuses kirjeldatakse täpsemalt Unverricht-Lundborgi tüüpi müokloonilise epilepsia mudellooma tsüstatiin B geeni puudulikkusega hiire neurokeemilist ja käitumuslikku fenotüüpi. Leitud muutused mutantsete hiirte aju trüptofaani metabolismis ning erutus– ja pidurdusnärviringete omavahelises tasakaalus võivad mõjutada müokloonilisele epilepsiale iseloomuliku haiguspildi väljakujunemist ning selgitada patoloogilisi mehhanisme inimesel
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