1,722,341 research outputs found
Stock Movement Prediction And N-Dimensional Inter-Transaction Association Rules (Extended Abstract)
No full textHongjun Lu 1 Jiawei Han 2 Ling Feng 3 1 The Hong Kong University of Science and Technology, China. [email protected] 2 Simon Fraser University, Canada. [email protected] 3 The Hong Kong Polytechnic University, China. [email protected] 1 Inadequacy in association rule mining for stock movement prediction Among all the data mining problems, discovering association rules from large databases is probably the most significant contribution from the database community to the field [1, 2, 5, 9, 10, 7]. The most often cited application of association rules is market basket analysis using transaction databases from supermarkets and departmental stores. We can discover rules like R 1 : 80% of customers who bought diaper also bought beer (diaper ) beer (20%; 80%)), where 80% is the confidence level of the rule and 20% is the support level of the rule indicating how frequent the rule holds. Association rules for prediction The same concept can be applied to other applications as wel..
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
Fig. 4. Asplenium danxiaense K.W in Asplenium danxiaense sp. nov. (Aspleniaceae, Aspleniineae), a new tetraploid fern species from Guangdong, China, based on morphological and molecular data
No full textFig. 4. Asplenium danxiaense K.W.Xu sp. nov. A. Danxia landform in the type locality of the new species. B. Habitat of the new species in a cave. C. Habit. D. Abaxial view of lamina. E. Abaxial view of lamina apex. F. Adaxial view of lamina. E. Rhizome and root.Published as part of Lin, Chen-Xue, Guo, Jian-Qiang, Zhou, Xin-Xin, Liao, Wen-Bo & Mao, Ling-Feng, 2022, Asplenium danxiaense sp. nov. (Aspleniaceae, Aspleniineae), a new tetraploid fern species from Guangdong, China, based on morphological and molecular data, pp. 162-173 in European Journal of Taxonomy 798 on page 168, DOI: 10.5852/ejt.2022.798.1679, http://zenodo.org/record/634121
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
A Tweet-Centric Approach for Topic-Specific Author Ranking in MicroBlog
No full textAbstract. Most users play two roles in micro-blog, namely, author and reader of tweets. Facing diverse users and mass user-generated contents in micro-blog, identifying and ranking influential authors who post topic-specific high-quality contents is a challenge. In this paper, we present a way to measure the quality of tweets, which accordingly determines the influence of their authors. The quality of the tweet is evaluated according to the topic focus degree, the retweeting behavior, and the topic-specific influence of the users who retweet it. In this way, the re-lationships between two micro-blog users extend beyond the traditional following (i.e., friend-follower) relationship to have more that are es-tablished indirectly and dynamically through tweets. We explore the use of these enriched relationships and present a tweet-centric topic-specific author ranking in micro-blog. To enable timely mass data processing on a daily or even hourly basis, we implement our ranking method using MapReduce framework. Some evaluation experiments have been con-ducted based on a large-scaled real dataset from Tencent micro-blog, which has the largest number of users (over 200 millions) in China. The result shows that our author ranking approach outperforms the PageRank-based and HITS-based approaches significantly in terms of ranking accuracy and quality
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