1,721,342 research outputs found
Matthew Walker, circa 1955
No full textMatthew Walker, M.D., (1906-1978) graduated with honors as part of the graduating Class of 1934. He was a surgeon, professor, chairman of the Department of Surgery, and the Provost of External Affairs. Matthew Walker is an intricate part of Meharry's history, having instructed and trained numerous students, doctors, and surgeons in the field
DRAFT SIMULATOR TO REPRODUCE FIELD WORK ON THE ROAD
No full textThe increase of the tractor reliability can be reached only through the design of the tractor in function of the real loads applied in different components during the machine usage. In recent years the introduction of CAE software in the design and development phase has greatly contributed to this advancement in reliability, however the final validation of the machine is only completed after experimental tests. These tests - aimed at reproducing the vehicle load cycles and validate design model - require a large amount of time and represent a significant cost to the manufacturer. In any case the field test of the tractor in real world conditions is difficult due to the problems connected with the weather, the seasonality of the operations and the variability of the test conditions. As a consequence the tests performed on the field are not repeatable and fully reliable. In the past different procedures have been introduced to reproduce the loads acquired during field test on proving grounds or on 4 post-test rigs. Despite the use of both methods manufactures were only able to accurately reproduce vertical loads and accelerations, these methods were not able to reproduce the longitudinal loads frequently introduced on the tractors during field operations. It is possible to introduce longitudinal loads during proving ground tests by connecting a load cart to the tractor, but the commercially available load carts are not designed to generate impulsive loads transmitted to the tractor due to the implements interaction with the soil. Moreover commercial load carts are connected to the hitch instead of the three point hitch commonly used to connect an implement to the tractor.
The aim of the paper is a feasibility study of the design of a load cart able to reproduce longitudinal impulsive loads transmitted by a three point hitch to the tractor to perform durability test on tractors. Measurements using different implements on different soil types were performed to define the loads transmitted by the implement to the tractor through the three point hitch. Then a dynamicmodel to simulate the connection between tractor-implement was defined to design the load cart. The load cart is constituted by a trailer connected to the three point hitch. The wheels of the trailer are braked in order to reproduce the draft acquired during field operations. The use of this load cart on proving ground will allow to reproduce the loads measured on the tractor during the whole life independently by the weather conditions
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
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
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
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