1,722,039 research outputs found
Has the WTO Appellate Body pushed the limits of global governance in the China-publications case? : a reply to Julia Ya Qin
No full textIn a previous issue of this Journal, Julia Ya Qin published a critical analysis of the World Trade Organization Appellate Body (AB) Report on the China-Publications case. This comment questions her conclusion that the AB has “pushed the limits of global governance” in the China-Publications case
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
The Research and Development of Glass-Cladding Single-Mode YAG Crystal Fiber
No full text單模態光纖是許多應用方面的關鍵元件，例如大增益主動元件、高效率雷射和高亮度光源。對於光纖放大器而言，單模態傳輸是一個重要的方式可以避免增益之競爭。因此，為了得到在特定波長更大的增益，我們研發單模摻鉻釔鋁石榴石晶體光纖，以為下世代之光纖通訊架構提供1000-1600 nm的光纖放大器。 實驗製造出高濃度的玻璃包覆摻鉻釔鋁石榴石晶體光纖，在單纖衣的情況下鉻離子的濃度增加至1.023×〖10〗^24 m^(-3)，相對於之前的結果提升3倍多的濃度大小。透過模擬，普通情形下，當光纖長度為4.5 cm，纖心直徑為25 µm，幫浦功率為450 mW時，可得最大增益為1.69 dB；在優化模型中，光纖長度為10 cm，纖心直徑為20 µm，鉻離子的濃度為2×〖10〗^24 m^(-3)，幫浦功率為 20 W時，可達之最大增益提升為23.43 dB。增益飽和信號功率約為7 dBm。 本實驗室採用雷射加熱基座生長法生長單晶纖心，並藉由提拉雷射加熱基座生長法進行玻璃包覆。為了減少模態數量，我們採用德國Schott公司生產的高折射率玻璃N-LasF9當做纖衣材料進行包覆，成功地製造出了單模純釔鋁石榴石晶體光纖。透過2 ~ 50 mm/min的包覆速度，N-LaSF9纖衣包覆的純釔鋁石榴石晶體光纖的截止波長可以在1381 nm至941 nm的範圍內被調變，在包覆速度大於10 mm/min時，其折射率恰好低於晶體纖心，波長1064 nm之光開始可以在N-LaSF9包覆之純釔鋁石榴石晶體光纖中傳輸。採用50 mm/min的包覆速度時可以使高折射率玻璃N-LaSF9之折射率下降至多達0.009。我們模擬出一個與LHPG製程相匹配，纖心直徑為12 µm，包覆速度為13 mm/min的N-LaSF9包覆的釔鋁石榴石晶體光纖，能夠在整個螢光波段單模態傳輸。此外，我們設計並製作出一根在大於1400 nm時會單模態導光的N-LaSF9纖衣純釔鋁石榴石光纖，並且觀察到其近場模態。Single-mode fibers are the key components in applications such as high gain active component, high efficient laser and high brightness light source. As for fiber amplifier, single-mode propagating is an essential way to get rid of the impact from gain competing. Thus in order to get larger gain at a typical wavelength, single mode Cr4+:YAG crystal fiber need to be developed. High concentration glass-cladding Cr4+:YAG crystal fibers were made. The concentration of Cr4+ ions was increased to 1.023×〖10〗^24 m^(-3), improving more than 3 times compared to previous fibers. Within a normal case, fiber length of 4.5 cm, core diameter of 25 µm and a maximum pump power of 450 mW, a maximum gain of 1.69 dB can be get. The improved model is fiber length of 10 cm, core diameter of 20 µm Cr4+ concentration of 2×〖10〗^24 m^(-3) and pump power of 20 W, in which the gain can be improved to 23.43 dB. The gain saturation signal power is about 7 dBm. A single-mode pure YAG crystal fiber was successfully fabricated. The cores of crystal fibers were grown by laser-heated pedestal growth (LHPG) method, and the cladding made of glass by the co-drawing LHPG process. The high-refractive index glass, N-LasF9 from Schott has been chosen as the most proper cladding material to decrease the transverse mode numbers. The cut-off wavelength of this N-LaSF9-cladding pure YAG SCCF can be tuned from 1381 to 941 nm by varying the cladding co-drawing speed from 2 to 50 mm/min in the CD-LHPG process. With a cladding speed larger than 10 mm/min, an N-LaSF9-cladding pure YAG SCCF begins to guide at 1064 nm. The maximum refractive index drop of N-LaSF9 glass cladding induced by the LHPG process can reach about 0.009 with the cladding speed of 50 mm/min. Corresponding to our LHPG fabrication process, a 12-µm core diameter and a cladding speed of 13 mm/min is needed to develop an N-LaSF9-cladding YAG fiber which is single-mode guiding at the whole emission bandwidth. In addition, the mode pattern of an N-LaSF9-cladding YAG fiber which is designed to be single-mode guiding beyond 1400 nm is fabricated
sj-docx-1-taj-10.1177_20406223221114214 – Supplemental material for Predicting the individualized risk of nonadherence to zoledronic acid among osteoporosis patients receiving the first infusion of zoledronic acid: development and validation of new predictive nomograms
No full textSupplemental material, sj-docx-1-taj-10.1177_20406223221114214 for Predicting the individualized risk of nonadherence to zoledronic acid among osteoporosis patients receiving the first infusion of zoledronic acid: development and validation of new predictive nomograms by Chong Li, Ke Lu, Qin Shi and Ya-qin Gong in Therapeutic Advances in Chronic Disease</p
sj-docx-2-taj-10.1177_20406223221114214 – Supplemental material for Predicting the individualized risk of nonadherence to zoledronic acid among osteoporosis patients receiving the first infusion of zoledronic acid: development and validation of new predictive nomograms
No full textSupplemental material, sj-docx-2-taj-10.1177_20406223221114214 for Predicting the individualized risk of nonadherence to zoledronic acid among osteoporosis patients receiving the first infusion of zoledronic acid: development and validation of new predictive nomograms by Chong Li, Ke Lu, Qin Shi and Ya-qin Gong in Therapeutic Advances in Chronic Disease</p
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
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