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Dr. Uhlenhopp Reviews
Full text linkVeterinary Medicine in Economic Transition by Malcolm Getz. Hardcover, 288 pp. ISU Press, Ames, Iowa 50014-8300. ISBN 0·8138-1814·1. 1997. Available through ISUPress, 2121 S. State Avenue, Ames, IA 50014·8300. $44.95, price subject to change without notice.
This book is well written for the intended , audience, and is highly recommended by the reviewer for reading by practicing veterinarians, veterinary students, veterinary educators, and state legislators. The author takes veterinary medicine from the warmth of the image of the Gentle Doctor to the cool impartiality of economic analysis. This treatment gives the reader an excellent grounding in the perspectives that someone without a veterinary bias might use in viewing the current economic status and the future of veterinary medicine in the United States. Historical changes ' in veterinary medicine and current trends of veterinary practice receive excellent coverage. The section subtitled "Prognosis" on pages 176-178 provides food for thought regarding influences and pressures on the profession.</p
Isoacids In The Ruminant
Full text linkThe Cornell University ruminant physiologist Peter J. Van Soest has stated "As a result of evolution, ruminants have probably adapted to efficient gluconeogenesis, while the lower digestive tract has adapted to the lack of sugar and starch. The true diet of the ruminant is not what it eats, but rather, the combination of fermentation products and fermented feed that escapes from the rumen. The net changes in the ingested feed include conversion of dietary protein and nitrogen into microbial protein, and conversion of carbohydrate into a variety of non-carbohydrate products."</p
Pseudorabies Eradication-Did We Look Before We Leaped?
Full text linkPseudorabies, or Aujesky's Disease, is currently one of the biggest concerns of the livestock industry. The disease has been in the United States since the mid 1800's and its first report in literature was by Aujesky in 1902. Prevalence of the disease in swine has risen dramatically in the U.S. from less than 1% in 1974 to greater than 10% now. This dramatic increase in prevalence has caused the livestock industry to look closely at the disease and ways to eradicate it. Several pilot projects were initiated to assess the feasibility of eradication. Given this initial data, the Livestock Conservation Institute (LCI), National Pork Producer Council, state and federal authorities, and other organizations have developed a national pseudorabies eradication plan and the LCI has set the goal of achieving pseudorabies-free status of all states by the year 2000.</p
Isoacids - An Overview
Full text linkRecently there has been much excitement regarding the use of isoacids as a feed additive. In the fall of 1985, isoacids became available as a new FDAapproved feed additive for dairy cows by Eastman® Chemical Co., under the trade name Eastman IsoPlus Nutritional Supplement. News releases in 1986 reported promising results obtained by Dr. Steven Nissen at Iowa State University in research with one of the isoacids, 2-ketoisocaproic acid. The objective of this paper is to explain what isoacids are, their mode of action, and the results of the early feeding trails of IsoPlus™. Isoacids are the branched ketoacids resulting from the natural rumen degradation of their corresponding amino acids. IsoPlus™ is the calcium salt of four volatile fatty acids (isobutyric, isovaleric, valeric, and 2-methylbutyric). Valeric acid is a straight chain 5-carbon fatty acid. The other three are isoacids (branched-chain fatty acids). Isobutyric, isovaleric and 2-methylbutyric are produced in the rumen mainly by oxidative deamination and decarboxylation of the amino acids valine, leucine, and isoleucine respectivelyl,2,3 (Figure 1). Valeric acid is produced mainly from carbohydrate or from amino acids such as proline.</p
Modified Medicated Early Weaning
Full text linkIn the past, when a swine unit wanted to eradicate a certain disease such as Pseudorabies, costly depopulation/repopulation was the only viable solution. Depopulation, facility cleanup, and repopulation is not always successful because nearby herds with a lower health status my provide a source for reinfection. In 1980, Tom Alexander of Cambridge University developed a system for producing pigs 'free of certain diseases without costly depopulation.</p
NCSC National Convention
Full text linkThis past summer the AVMA held its 107th Annual meeting in Las Vegas, nevada. It has been heralded as the biggest and best AVMA Convention ever, boasting the largest attendance and most presentations ever at an annual meeting of the organizations.</p
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
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
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