1,720,955 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
Conversion of Exotic Cool-Season Grasslands to Restored Native Plant Communities Utilizing Herbicide Treatments
No full textExotic, invasive weeds are a major issue in maintaining, rehabilitating, and restoring native plant communities. Many areas in the northern Great Plains are now dominated by exotic cool-season grasses such as smooth brome (Bromus inermis), Kentucky bluegrass (Poa pratensis), and reed canarygrass (Phalaris arundinacea). Information was collected to evaluate methods of control for exotic grass species and reestablishment or rehabilitation of native plant communities in eastern South Dakota. During the fall of 2005 and the spring of 2006, I implemented a smooth brome removal study at five reed canarygrass sites in eastern South Dakota. Five fall herbicide treatments, two spring herbicide treatments, and an untreated control that received no herbicide or seed addition were applied at each location in fall 2005-spring 2006 and fall 2006-spring 2007. Three fall herbicide treatments and two spring herbicide treatments were added for fall 2006-spring 2007. Herbicides were applied over clipped vegetation that had residual vegetation removed in 2005-2006 and over standing vegetation in 2006- 2007. Sites were seeded with a native plant mix within two weeks following spring herbicide treatment. Reed canarygrass cover in untreated plots ranged from 80-99%, while cover on herbicide treated plots ranged from 0-98% on 2005-2006 plots and 26-99% on 2006-2007 plots at the conclusion of the study, suggesting that clipping is necessary to achieve adequate control. Native plant response was limited throughout the study. During the fall of 2005 and spring of 2006, I implemented a smooth brome removal study at five smooth brome sites in eastern South Dakota. Seven fall herbicide treatments, five spring herbicide treatments, an untreated plot that was planted with a native seed mix, and an untreated control that received no herbicide or seed addition were applied at each location in fall 2005-spring 2006 and fall 2006-spring 2007. Based upon first year results, three fall herbicide treatments and two spring herbicide treatments were added for fall 2006-spring 2007. Sites were seeded with a native plant mix within two weeks following spring herbicide treatment. Smooth brome cover in untreated plots ranged from 73-99%, while cover on herbicide treated plots ranged from 0-84% on 2005-2006 plots and 0-98% on 2006-2007 plots at the conclusion of the study. Future response of native plants will be important in determining the proper timing and herbicide combination. During the fall of 2005 and spring of 2006, I implemented a removal study at six native prairie sites in eastern South Dakota that had been invaded by smooth brome and Kentucky bluegrass. Treatments included five herbicide combinations, a fall burn, and an untreated control. Untreated plots averaged 64% smooth brome cover and 38% Kentucky bluegrass cover after the third growing season. Smooth brome and Kentucky bluegrass cover on herbicide treated plots ranged from 6 to 23% and 15 to 35%, respectively, after the third growing season. Burned plots had 20% and 19% cover of smooth brome and Kentucky bluegrass, respectively, after the third growing season. Spring and fall treatments had similar native plant cover after three growing seasons. I initiated a study at two sites in southeastern South Dakota to determine the necessary rates of Journey® herbicide applied pre-emergence to establish native grasses. Spring application of 0.07 kg ai/ha imazapic + 0.18 kg ai/ha glyphosate, 0.09 kg ai/ha imazapic + 0.25 kg ai/ha glyphosate, and 0.11 kg ai/ha imazapic + 0.31 kg ai/ha glyphosate and an untreated control were applied at each site. Plots were seeded within two weeks following herbicide application with a mixture of native warm- and coolseason grasses. My results indicate that a pre-emergent application of 0.07 kg ai/ha imazapic + 0.18 kg ai/ha glyphosate can improve establishment of planted native grasses. Vegetative characteristics and grassland bird use of conservation plantings were studied in eastern South Dakota Game Production Areas, June 2007-2008. Fourteen fields, from one to eight years old at the onset of the study, were surveyed in each year to describe vegetative characteristics and to correlate grassland bird use. Grassland birds were sampled along fixed width transects during June 2007-2008. Vegetation was sampled at seven points along three parallel transects within the bird sampling transects. Younger plantings had lower height and cover dead vegetation, greater litter depth, higher coverage of alfalfa and unplanted forbs, and more bare ground than older plantings. Nonmetric multi-dimensional scaling based upon vegetative characteristics showed that sites tended to become more similar with age. Fifteen bird species were identified during transects in each year. Six species showed a relationship between abundance and the measured vegetation structure and composition variables
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
Upland prairie restoration at Fern Ridge Lake: 2018 report and restoration plan
No full text"This document summarizes long-term monitoring and provides management recommendations for prairie restoration efforts at Fern Ridge Reservoir on lands managed by the US Army Corps of Engineers. Quantitative and/or qualitative monitoring has occurred annually since 2008, dependent upon whether treatment actions have occurred. In 2018, we quantitatively monitored 9 sites: Big Spires, West Spires, East Spires, Cherry Orchard, West Shore, East Shore, North Eaton, South Eaton, and Middle Green Oaks"--Executive summary.report prepared by Erin C. Gray and Matt A. Bahm.Title from PDF caption (viewed on February 4, 2022).This archived document is maintained by the State Library of Oregon. It is for informational purposes and may not be suitable for legal purposes.Includes bibliographical references (page 54).Mode of access: Internet from the State Library of Oregon U.S. Government Publications Collection.Text in English
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
