1,722,724 research outputs found
Machinery structure, machinery subsidies, and agricultural productivity: Evidence from China
Get PDFAlthough agricultural machinery is indispensable for modern agriculture, the effect of machinery structure on food production is rarely scrutinized. Machinery structure, referring to the proportion of high-capacity machines which are represented by tractors with relatively high horsepower, is used to measure the scale of agricultural machinery. In response, this article investigates how agricultural machinery structurally impacts grain production theoretically and empirically, with particular emphasis on the effects of capacity structure and subsidy policy. The article estimates a Translog production function with a panel dataset covering 126 counties across Xinjiang and Hubei provinces in China from 2002 to 2012. Though we find the general elasticity of output with respect to machinery inputs is .03, the capacity structure of agricultural machines could impact agricultural production by inducing the reallocation of other input factors. Along with the upsizing of farming machines, we observe the complementarity between machinery horsepower and land inputs in production increases, while the joint effect of machinery and fertilizer decreases. The positive land channel is found in areas with fewer high-capacity machines, while the negative fertilizer channel occurs when there are more large machines
Leucoagaricus subtropicus sp. nov. (Agaricaceae) from Anhui Province, China
No full textYang, Yu, Xiao, Yuan-Pin, Luo, Xia, Gong, Yin-Ping, Wang, Shuai, Yang, Meng-Meng, Tao, Ying-Ying (2023): Leucoagaricus subtropicus sp. nov. (Agaricaceae) from Anhui Province, China. Phytotaxa 606 (2): 104-118, DOI: 10.11646/phytotaxa.606.2.2, URL: http://dx.doi.org/10.11646/phytotaxa.606.2.
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
sj-pdf-1-imr-10.1177_03000605221103525 - Supplemental material for Factors associated with failure of high-flow nasal cannula oxygen therapy in patients with severe COVID-19: a retrospective case series
No full textSupplemental material, sj-pdf-1-imr-10.1177_03000605221103525 for Factors associated with failure of high-flow nasal cannula oxygen therapy in patients with severe COVID-19: a retrospective case series by Xiao-Huan Ma, Meng-Meng An, Fang Yin, Jie Zhang, Meng-Yun Peng, Hong Guan and Ping Gong in Journal of International Medical Research</p
Supplemental Table2 -Supplemental material for Subcortical nuclei in Alzheimer’s disease: a volumetric and diffusion kurtosis imaging study
No full textSupplemental material, Supplemental Table2 for Subcortical nuclei in Alzheimer’s disease: a volumetric and diffusion kurtosis imaging study by Ming-Liang Wang, Xiao-Er Wei, Jian-Liang Fu, Wei Li, Meng-Meng Yu, Peng-Yang Li and Wen-Bin Li in Acta Radiologica</p
Supplemental Table1 -Supplemental material for Subcortical nuclei in Alzheimer’s disease: a volumetric and diffusion kurtosis imaging study
No full textSupplemental material, Supplemental Table1 for Subcortical nuclei in Alzheimer’s disease: a volumetric and diffusion kurtosis imaging study by Ming-Liang Wang, Xiao-Er Wei, Jian-Liang Fu, Wei Li, Meng-Meng Yu, Peng-Yang Li and Wen-Bin Li in Acta Radiologica</p
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
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