1,720,981 research outputs found
Observations sur la méthode de Gabriel Bertrand pour le dosage des sucres réducteurs
Get PDFOn sait que Gabriel Bertrand a laissé son nom à une méthode aujourd,hui très répandue, considéré, comme officielle, qui consiste à oxyder le sucre réducteur au moyen d'une liqueur du type Barreswill-Fehling, solution cuivrique contenant de la soude et du sel de Rochelle. Au bout d'un temp6 de réduction de 3 minutes à latempérature de l'ébullition, l'oxyde cuivreux est dissous en milieu acide en présence de Fe3+en excès. L'oxyde cuivreux a été également dosé volumétriquement après dissolution dans le bichromate de sodium ou dans le sulfate cérique, l'excès de liqueur oxydante est déterminé dans les deux cas, à l'aide d'une solution de sulfate ferreux en utilisant la ferrophénanthroline comme indicateur
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
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
La politique d'ordre public à Caen sous le mandat de François-Gabriel Bertrand (1848-1870)
No full textBefore Louis-Napoléon Bonaparte came to power, first as President and then as Emperor, the city of Caen was seen as one of the most insalubrious cities where insecurity reigned. Residents indulged in a wide variety of immoral practices, subjecting the city to degradation, and making the public domain unsafe. In the first half of the 19th century, different municipal teams tried to resolve the many problems that Caen faced, but did not manage to bring the city into the hygienic progress of the century, nor to promote order and security. Referred to as a "sleepy city" by Gabriel Désert (History of Caen, 1981), Caen experienced a turning point in 1848, with the arrival of a reformist mayor François-Gabriel Bertrand. During his 22 years in office, he established public order based on four major fields of action: health, public security, traffic control, and 'good order'. The establishment and maintenance of these public policies concerned the city as a whole including its dwellers, collectively and individually. The mayor’s success was made possible due to the significant freedom of action he enjoyed, a municipal council that supported him in the interest of the city, as well as the stamp of approval he received from higher administration. Importantly, the mayor also delegated authority to a group of municipal staff, who exercised control and active surveillance in some locations.Avant l’arrivée au pouvoir de Louis-Napoléon Bonaparte, d’abord président puis empereur, la ville de Caen est vue comme une cité des plus insalubres où l’insécurité règne. Les habitants de cette ville délétère se livrent à un grand nombre de pratiques allant à l’encontre de la morale, rendant la ville sujette à de nombreuses dégradations, et la voie publique dangereuse, où les habitants sont sujets à de nombreux accidents. Au cours de la première moitié du XIXe siècle, les différentes équipes municipales tentent de régler les nombreux problèmes présents à Caen, mais ne parviennent pas à emmener la ville vers les progrès hygiéniques du siècle, ni à y promouvoir l’ordre et la sécurité. Qualifiée de ville somnolente, pour reprendre les mots de Gabriel Désert (Histoire de Caen, 1981), la ville de Caen connaît un tournant dans son histoire en 1848, avec l’arrivée d’un maire réformateur : M. François-Gabriel Bertrand. Au cours de sa longue édilité de 22 années, il instaure un ordre public à Caen, reposant sur les quatre grands champs d’action que sont : la salubrité, la sécurité publique, l’encadrement de la circulation au sein de la ville et le « bon ordre ». L’instauration et le maintien de cette politique d’ordre public concerne la ville dans son ensemble, et les habitants et usagers, collectivement et individuellement. Elle est permise grâce à une grande liberté d’action du maire, due à un conseil municipal le laissant agir pour les intérêts de la cité, et d’un soutien de l’administration supérieure. Mais également grâce à un ensemble de personnels municipaux, qui exercent un contrôle et une surveillance active en certains lieux, par délégation de l’autorité par le maire
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