1,721,062 research outputs found
Ecological and evolutionary implications of immunological priming in invertebrates
Get PDFInvertebrates have an immune response that differs considerably from the acquired immune response found in vertebrates. However, new studies indicate that past experience with a pathogen can provide individual invertebrates, or their descendants, with enhanced immunity. This prophylactic effect, termed immunological priming, is functionally similar to the acquired immune response in vertebrates. This newfound
complexity of invertebrate immunity begs investigation into the conditions under which immunological priming should evolve, and its consequences for population dynamics
The History of little Tom Tucker.
No full textIncludes 16 woodcuts.First sentence: "Little Tom Tucker, Sing for your supper, What shall I sing for?"Date from Toronto. Osborne Coll., p. 105. Cf. Mansell 248:105.Cover title.Mode of access: Internet
Little Tom Tucker : this is little Tom Tucker that sung for his supper.
No full textIncludes 8 woodcuts.First sentence: "Little Tom Tucker, Sing for your supper."Dates established from Hindley, C. The History of the Catnach Press.Mode of access: Internet.Copy in McGill Library's Rare Books and Special Collections: hand-coloured title-page; 7 black & white illustrations. Buff pictorial wrappers. Osborne, Vol. II - p.688. Three Centuries of Nursery Rhymes and Poetry for Children - Opie - p.39. St. Nicholas Books. Toronto. May/76. $25.00
Disease spread in age structured populations with maternal age effects
Get PDFFundamental ecological processes such as extrinsic mortality determine population age structure. This influences disease spread when individuals of different ages differ in susceptibility, or when maternal age determines offspring susceptibility. We show that Daphnia magna offspring born to young mothers are more susceptible than those born to older mothers, and consider this alongside previous observations that susceptibility declines with age in this system. Thus, we used a Susceptible-Infected compartmental model to investigate how age-specific susceptibility and maternal age effects on offspring susceptibility interact with demographic factors affecting disease spread. Our results show a scenario where an increase in extrinsic mortality drives an increase in transmission potential. Furthermore we identify a realistic context in which age effects and maternal effects produce conditions favouring disease transmission
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
The Three Mouths of Little Tom Drum
Get PDFAfter his mother makes him his favorite strawberry pie for his eighth birthday, Little Tom Drum can’t wait to try a piece, but it only has him begging for more. His wish of having three mouths to eat more pie comes true when he sneaks back to the kitchen to steal a piece. His mother catches him and notices his two extra mouths, one on each cheek! Thereafter, he opts to lead a life of isolation and inventing. On his next birthday, he wishes for his old face back. Eventually with the help of an invention, his granted wish comes with a lesson: be careful what you wish for (and how much you eat)
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
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