1,721,074 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
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
Abstract 177: Thymidine quinoxaline conjugates as a novel selective and effective photosensitizer for anticancer photodynamic therapy
No full textAbstract
Thymidine quinoxaline conjugates are a new class anticancer agent that exhibits selective anticancer activity by targeting the abnormally high level of thymidine kinase of the thymidine salvage pathway in cancer cells. In addition, the conjugated quinoxaline moiety could also act as a photosensitizer to generate reactive oxygen species that would significantly enhance the anticancer activity. Therefore, a variety of structural derivatives were synthesized and investigated for the potential of combined anticancer activity. We found that the thymidine moiety was critical for the accumulation of compounds in cancer cells and thus their activity. On the other hand, the substitutions and additional conjugation of quinoxaline moiety had significant impact on the effectiveness to generate reactive oxygen species for enhanced potency. Among all the compounds studied, dT-QP exhibited a potent activity against liver cancer cells with IC50 at 20 nM under photo-irradiation at 400 nm wavelength for 20 min. This potent activity of dT-QP was 12 times more effective than that of the clinically used photosensitizer protoporphyrin IX (IC50 at 250 nM) under the same condition and 5 times more potent than anticancer drug doxorubicin (IC50 at 100 nM). In addition, thymidine quinoxaline conjugates were found to form aggregates with an average size of 200 nm. Further optimization of the aggregating condition led to a highly stable suspension of 90 nm size nanoparticles containing a tumor-specific peptide that could be used for in vivo study. Therefore, thymidine quinoxaline analogs could be a selective anticancer agent and effective photosensitizer for potential photodynamic therapy.
Citation Format: Qibing Zhou, Zhiwei Wang, Rong Yang, Ting Qian, Dejun Zhang. Thymidine quinoxaline conjugates as a novel selective and effective photosensitizer for anticancer photodynamic therapy [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 177. doi:10.1158/1538-7445.AM2017-177</jats:p
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
APPENDIX 12 in Detangling the effects of patch attributes on bryophyte diversity in fragmented subtropical secondary forests - a case study of land-bridge islands
No full textAPPENDIX 12. — Relationships of accumulative species number with accumulative sampling efforts for eight largest islands.Published as part of Zhang, Feng, Luo, Guangyu, Guo, Shuiliang, Li, Dandan, Yang, Jun, You, Dejun, Zhang, Ting, Xu, Nanlong & Yu, Jing, 2023, Detangling the effects of patch attributes on bryophyte diversity in fragmented subtropical secondary forests - a case study of land-bridge islands, pp. 133-160 in Cryptogamie, Bryologie 20 (6) on page 160, DOI: 10.5252/cryptogamie-bryologie2023v44a6, http://zenodo.org/record/808367
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
- …
