125,274 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
Relationship between sympathetic neural activity, coronary dynamics and vulnerability to ventricular fibrillation during myocardial ischemia and reperfusion
No full textThe relationship between neural sympathetic discharge and vulnerability to ventricular fibrillation during myocardial ischemia and reperfusion was studied in 26 chloralose-anesthetized dogs. Preganglionic cardiac sympathetic impulse activity and ventricular fibrillation thresholds were separately determined before and during a 10-minute period of left anterior descending coronary artery occlusion and during release-reperfusion. Within 2 minutes of occlusion the ventricular fibrillation threshold was significantly decreased (from 25 +/- 1.3 to 16 +/- 2.3 mA, p less than 0.05) corresponding with the period of maximal activation of cardiac sympathetic preganglionic fibers (from 4.4 +/- 0.2 to 6.3 +/- 0.5 impulses/sec). Coronary sinus blood flow and oxygen tension decreased significantly. All these changes persisted for 5 to 6 minutes, thereafter returning to control levels despite continued obstruction of the coronary artery. A transient but significant reduction in ventricular fibrillation threshold also occurred with release of the occlusion but was unaccompanied by increases in sympathetic neural discharge. Bilateral stellectomy completely prevented the ventricular fibrillation threshold changes observed during coronary artery occlusion. However, there was no change in coronary sinus oxygen tension or blood flow. During reperfusion, stellectomy increased rather than decreased vulnerability to ventricular fibrillation. Stellectomy augmented the reactive hyperemic response to release-reperfusion. These findings indicate that enhanced cardiac sympathetic neural activity contributes to ventricular vulnerability associated with coronary artery obstruction. An opposite action results during release-reperfusion. Cardiac sympathetic neural discharge, by reducing the magnitude of reactive hyperemic response through influence on coronary vascular tone, exerts an antifibrillatory effect
Le Canarien. Histoire de la conquête des Canaries par Jean de Béthencourt et Gadifer de La Salle, rédigée en partie par Pierre Bontier, moine de Saint-Jouen de Marnes et Jean Le Verrier, prêtre.
No full text[Le Canarien (français moyen). ca 1410]http://catalogue.bnf.fr/ark:/12148/cb30100434z. - Codex Montruffet. Don Aronssohn en 1938 au Musée de peinture de Rouen. Inv. BMR 21225-1 (23.09.1939)."Histoire de la première descouverte et conqueste des Canaries... / F. Bontier; J. le Verrier,... Paris: J. de Heuqueville, 1630 [Leber p 6330] ; Note sur un volume manuscrit, contenant la Chronique de la Conquête des Iles Canaries par Jean de Béthencourt / L. de Duranville. In: Précis de l'Académie de Rouen, 1853-1854, p. 249-256 [U 3852-2] ; Le Canarien.... / G. Gravier, publ. de la Soc. de l'Histoire de Normandie 11, 1874 [N 272-11-B-11] ; La conquête et les conquérants des Iles Canaries... / L. Delisle. In: Journal des Savants, nov. 1896, p. 644-649 [U 1536] ; Les manuscrits du Canarien : étude critique / A. Sadourny. 2000 [N br mm 2121] ; Le Canarien ou la conquête des îles Canaries par Jean de Béthencourt / B. Malfante [Trad.]. Rouen, 2009 [N p 2930] ; Voir aussi : La conquête et les conquérants des îles Canaries / Bontier, Le Verrier, c. 1405. Ms Egerton n°2729 (British Museum) [http://www.bl.uk] ; Le Livre nommé ""Le Canarien"" / Dir. E. Aznar. Paris, 2008 [Nm7893]"Numérisé par le partenaireAppartient à l’ensemble documentaire : Rtmgus1Numérisé par le partenaireOuvrages avant 180
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
L'aluminium, le manganèse, le baryum, le strontium, le calcium et le magnésium / Adolphe Lejeal,... ; introduction par M. U. Le Verrier,...
No full textCollection : Encyclopédie de chimie industrielleContient une table des matièresAvec mode text
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
Measurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
No full textThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
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