1,720,959 research outputs found
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
Resource selection, habitat influences on population performance, and body size trade-offs of cervids in a nutritionally variable environment
No full textAnthropogenic influences on the landscape are an ever-evolving challenge. Habitat fragmentation can influence the performance, sustainability, and spatial ecology of wildlife populations. Conversion of rangeland to row-crop farming is the most wide-spread landscape alteration in the United States. Nutritional ecology of wild herbivores is inherently tied to the landscape and interrelated to population performance. Agricultural encroachment could create spatio-temporal nutrient fluctuations, thereby inducing periods of enhanced or diminished forage. The nutrient limitation responsible for variable body condition and reproductive trade-offs is largely unknown.
We sought to understand cropland influences on cervid space use and population performance. Further, we evaluated nutritive ties towards energetic allocation of growth and reproduction using captive cervids to understand relationships in wild settings. We accumulated multi-year data on mule deer (Odocoileus hemionus) movement and morphology in the Texas Panhandle to evaluate resource selection and how habitat use influences morphology. In addition, we raised captive white-tailed deer (Odocoileus virginianus) cohorts to maturity where individuals were split into 2 treatments of diets varying in digestible energy. Mule deer exhibited a mild selection of summer crops and strongly selected cropland during the winter to facilitate nutritional intake when rangeland conditions were poor. We identified a threshold where cropland use decreased with > 20-30% cropland density at multiple scales. Cropland use within specific mule deer annual life-history stages enhanced body condition, body mass, and antler size in males. Further, female mule deer that used cropland had increased reproductive success. Captive adult white-tailed deer exhibited lower mass, body condition, and antler size on a low energy diet as opposed to a standard diet. Birthing rates, litter size and fawn birth mass for reproductive females, however, did not differ between treatments.
In summary, conversion of rangeland to row-crop farming may alter nutritional health relationships in future wild cervid populations. Cervids exhibit a physiological cue to reduce growth to lower energetic requirements to continue reproducing. Therefore, as the agriculture-rangeland mosaic continues to change, populations may undergo shifts in morphology to match their nutritional environment. Furthermore, cropland has the capacity to enhance population measures beyond current adaptations, however, greater agricultural densities may inhibit population spread. Our study demonstrates important population level interactions with the nutritional environment for prominent large mammal species to aid continued management in the foreseeable future
Browse Nutritive Dynamics and Temporal Overlap of Ungulates in the Southern Cross Timbers and Prairies of Texas
No full textWhite-tailed deer (Odocoileus virginianus) are a species of ecological and economic importance in the Southern Cross Timbers Region of Texas. White-tailed deer are concentrate selectors and select for the most nutritious plant parts. However, these vary in availability and nutritive value across seasons. This study evaluated the seasonal nutritive dynamics of the preferential browse species post oak (Quercus stellata Wangenh.), skunkbush (Rhus trilobata Nutt.), winged elm (Ulmus alata Michx.), chittamwood (Bumelia lanuginosa (Michx.)) Pers. Var. albicans Sarg), elbowbush (Forestiera pubescens Nutt.), and live oak (Quercus virginiana Mill.). This study took place on a high fenced ranch near Cross Plains, Texas. Samples were collected across two ecological sites (loamy bottomland and clay loam) bimonthly for one year, starting in May 2023. Browse nutritional composition was evaluated including crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), fat, protein-precipitable phenolics (PPP), and in-vitro true digestibility (IVTD). Dormancy and growing period proved to be more influential than individual months on the nutritive dynamics across species. NDF and ADF increased in the dormancy period while IVTD decreased. During the growing season, IVTD increased and fibrous components decreased.
To compliment these nutritional findings and gain insight into habitat preferences and diel activity of native and exotic ungulates in Texas, motion activated game cameras were deployed across the ranch to monitor white-tailed deer, blackbuck (Antilope cervicapra), and gemsbok (Oryx gazella). Game cameras were monitored for a one-year period beginning in December of 2023 and ending in November 2024. Analysis of diel activity overlap between species indicated that there was no clear temporal avoidance among the species. The species diel activity was reflective of behavior in their native and free-roaming habitats. Results from our canonical correspondence analyses also indicated that environmental preferences differed among species. While white-tailed deer appeared to have no clear preferences among the environmental variables, blackbuck and gemsbok were likely to be in separate habitats that varied seasonally.
These findings increase our understanding of nutritional dynamics, habitat preferences, and diel activity of native and exotic species within niche high fence systems. Managing the environment to meet the preferential needs of multiple species can help to minimize interspecies competition, disease transmission, and sustain a healthy ecosystem
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
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