1,720,957 research outputs found
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
Above-ground Biomass and Nutrient Accumulation of Chamaecyparis formosensis (Taiwan Red Cypress) Plantation in Ta-Hsueh-Shan Area
No full text本研究旨在探討大雪山地區之14,21及29年生紅檜人工林地上部生物量及
養分聚積,以不同胸徑階選取樣木,並以分層割取法測定各樣木之各項形質
生長,再以胸徑為單一自變數之相對生長關係式估算地上部生物量與養分
聚積。研究結果獲悉: 14年生林分生物量為61.79ton/ha;氮198.94kg/ha,
磷30.93kg/ha,鉀203.33kg/ha,鈣249.87kg/ha及鎂42.46kg/ha。 21年生
林分生物量為105.02ton/ha;氮331.48kg/ha,磷54.95kg/ha,鉀286.66kg/
ha,鈣302.16kg/ha及鎂61.50kg/ha。 29年生林分生物量為84.19ton/ha,
氮234.95kg/ha,磷34.07kg/ha,鉀171.28kg/ha,鈣243.07kg/ha及鎂63.64
kg/ha。樣木之生產構造中,枝及葉量之垂直分佈顯示:葉量集中在樹冠之
上、中部位,樹冠下層留存大量之枯枝,亟須實施修枝作業以提高林木品質
。 Weibull機率密度函數能有效配置林分之直徑分佈,並可以此推測林分
各組成分生物量。林木之養分濃度以葉部較高,幹材最低,枝皮、幹皮及枝
材居中;隨著林分發育,由於組織部位之養分濃度上之變化較小,整個地上
部之養分聚積量隨著生物量之擴張而變動。The purpose of this study is to investigate the above-ground
biomass and nutrient accumulation of 14, 21 and 29 years old
Chamaecyparis formosensis plantations in Ta-Hsueh-Shan area.
Stratified-clip technique was used to obtain the growth data of
sample trees which was selected from various DBH classes of
study plots. The above-ground biomass and nutrient accumulation
of each stand were estimated by allometric equations with DBH
as single independent variable. All the results can be
summarized as follows: 14 years old stand biomass:61.79ton/ha,
N:198.94kg/ha, P:30.93kg/ha, K:203.33kg/ha, Ca:249.87kg/ha,
Mg:42.46kg/ha. 21 years old stand biomass:105.02ton/ha, N:331.48
kg/haa, P:54.95kg/ha, K:286.66kg/ha, Ca:302.16kg/ha, Mg:61.50kg/
ha. 29 years old stand biomass:84.19ton/ha, N:234.95kg/ha,
P:34.07kg/ha, K:171.28kg/ha, Ca:243.07kg/ha, Mg:63.64kg/ha.
Major vertical dry-matter distributions of branch and leaf of
the sampled tree showed that leaf dry-matter was concentrated
in the upper and middle parts of the crown. The largre amount
of mortal branch was significantly left at the bottom of the
crown which makes the prunning operation necessary in order to
upgrade the quality of individual tree. Weibull probability
density function has been proved to be the best description of
diameter distribution of the stand. It may also be used to
estimate biomass of each component of stand. Nutrient
concentration varied considerably between tree tissues. It was
the highest in the needle, the lowest in the stemwood, and
intermediate in the branch bark, stem bark and branch wood.
Because tissue nutrient concentrations exhibited relatively
little change with the stand development, total above-ground
nutrient accumulation followed the dynamic of biomas expansion
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
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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