1,721,760 research outputs found
Characterization of a competence pheromone in Bacillus subtilis
Full text linkThesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1995.Includes bibliographical references (leaves 110-122).by Roy David Magnuson.Ph.D
Alien Registration- Roy, David (Auburn, Androscoggin County)
Full text linkhttps://digitalmaine.com/alien_docs/30262/thumbnail.jp
Aspects juridiques des interventions comtales dans la vie économique à Ath (XIVe-XVIe siecles)
No full textDe Roy David, Deperchin-Gouillard A. Aspects juridiques des interventions comtales dans la vie économique à Ath (XIVe-XVIe siecles). In: Revue du Nord, tome 78, n°314, Janvier-mars 1996. p. 132
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
The effects of climate and habitat on Butterfly populations
No full textBiodiversity is threatened globally and there is a need to monitor and understand future changes. Rigourous assessment of trends in insect populations is difficult because they are a species-rich, yet little known taxa. Butterflies are among the most practical insect group to study, given their extensive long-term, large-scale datasets.The effects of climate and habitat of butterfly populations are examined to understand the implications of environmental change for these, and other, insect taxa. It is found that first appearance (phenology) of most British butterflies has advanced in the last two decades and is strongly related to climate. Further warming is predicted to advance appearance by 2 to 6 days per 1°C temperature increase. Despite this strong relationship between appearance dates and temperature over time, a comparable geographical relationship between temperature and timing was not detected for over a third of species analysed, suggesting their populations may be adapted to their local climates.A seasonal switch in egg-laying requirements of the butterfly, Polyommatus bellargus, demonstrates an interaction between niche requirements and climate determine fluctuations in populations. The effect of climate on populations of other butterflies was studied using national weather records and indices of population change since 1976. Strong associations between weather and population fluctuations were found in 28 out of 31 species studied. Models derived from these associations predict that most species will increase in abundance under warmer climates. Large scale habitat modification is known to have profoundly affected butterfly populations over the last century. Data from a farm scale evaluation of the effects of management for genetically modified herbicide-tolerant (GMHT) crops showed that effects on vegetation cover and flowering at this scale has marked knock-on effects for butterflies and other mobile, nectar feeding insects
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Roy David and K. Lorraine James Liechty gravemarker, Providence, Utah, 2000.
No full textRoy David and K. Lorraine James Liechty gravemarker, Providence, Utah. Image is of a headstone for two, with two small evergreen trees (Alberta Spruce) set into the flower holes in the cement. A wire stand with a wreath made of pine boughs tied with red faux poinsettias and pinecones stands in front of the stone. Also behind the headstone is a tall metal hanger with a small white birdhouse with a black roof and black base and with an Christmas tree painted on the front. Snow surrounds the stone
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
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