1,721,044 research outputs found
Developing a Document-based Workflow Modeling Support System: A Case-Based Reasoning approach
No full textBichromatic buckets: An effective technique to improve the accuracy of histograms for geographic data points
No full textHistograms have been widely used for estimating selectivity in query optimization. In this paper, we propose a new technique to improve the accuracy of histograms for two-dimensional geographic data points that are used in many real-world Geographic Information Systems. Typically, a histogram consists of a collection of rectangular regions, called buckets. The main idea of our technique is to use a straight line to convert each rectangular bucket to a new one with two separating regions. The converted buckets, called bichromatic buckets, can approximate the distribution of data objects better while preserving the simplicity of originally rectangular ones. To construct bichromatic buckets, we propose an adaptive algorithm to find good separating lines. Two strategies to find the separating lines, one based on the potential skewness gains of the candidate lines and the other based on the difference of density levels of the data regions, are proposed and used flexibly within our algorithm. Then, we describe how to apply the proposed technique to existing histogram construction methods to improve the accuracy of the constructed histograms further. Results from extensive experiments using real-life data sets demonstrate that our technique improves the accuracy of the histograms by 2 times on average. (C) 2013 Elsevier B.V. All rights reserved
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
노트 : Korea Development Institute, P.O. Box 113, Cheongnyang, Seoul 130-012, Korea. (T)82-2-958-4204, (email) [email protected]. This paper is the outgrowth of the paper prepared for the KDI 33rd Anniversary Conference on Industrial Dynamism and Comptitiveness in the East Asian Economies. The author is grateful to Chunsik Woo, Chin-Hee Hahn, Dongseok Kim, Jaeho Lee and Joonghae Suh for their constructive comments and encouragement, and appreciate participants of the conference for their comments. In particular, Dongseok Kim and Jaeho Lee provided invaluable advice on productivity and trade performance respectively. Assistance from Jungmi Kim and Kwangsung Kim is greatly appreciated
sj-pdf-2-ejo-10.1177_11206721211037826 – Supplemental material for Factors associated with the effectiveness of part-time patching for intermittent exotropia in children
No full textSupplemental material, sj-pdf-2-ejo-10.1177_11206721211037826 for Factors associated with the effectiveness of part-time patching for intermittent exotropia in children by Heeyoung Choi, Su Jin Kim, Jaeho Jung, Ji-Eun Lee, Sang Yoon Kim and Seung Uk Lee in European Journal of Ophthalmology</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
sj-pdf-1-ejo-10.1177_11206721211037826 – Supplemental material for Factors associated with the effectiveness of part-time patching for intermittent exotropia in children
No full textSupplemental material, sj-pdf-1-ejo-10.1177_11206721211037826 for Factors associated with the effectiveness of part-time patching for intermittent exotropia in children by Heeyoung Choi, Su Jin Kim, Jaeho Jung, Ji-Eun Lee, Sang Yoon Kim and Seung Uk Lee in European Journal of Ophthalmology</p
sj-tiff-2-tct-10.1177_15330338211041212 - Supplemental material for Clinical Outcome of Salvage Radiotherapy for Locoregional Clinical Recurrence After Radical Prostatectomy
No full textSupplemental material, sj-tiff-2-tct-10.1177_15330338211041212 for Clinical Outcome of Salvage Radiotherapy for Locoregional Clinical Recurrence After Radical Prostatectomy by Sung Uk Lee, Kwan Ho Cho, Jin Ho Kim, Young Seok Kim, Taek-Keun Nam, Jae-Sung Kim, Jaeho Cho, Seo Hee Choi, Su Jung Shim, Jin Hee Kim and Ah Ram Chang in Technology in Cancer Research & Treatment</p
Unpacking Instagram use: The impact of upward social comparisons on usage patterns and affective experiences in the wild
No full textUsers of Social Networking Sites (SNS) often engage in social comparison, an experience that can elicit various affective responses. While previous studies have established important links between social comparison and emotion, the granularity and ecological validity of this work remains limited. To address this issue, we conducted a field study with 40 Instagram users. We unobtrusively recorded their Instagram usage patterns (e.g., time on site and the type of content consumed, such as feed, story, or message). Additionally, we used experience sampling methods and questionnaires to capture their affective experiences, social comparisons, and depression severity. Our results elucidate the interplay between these emotions, traits, and tendencies during Instagram use. Notably, we find that while passive or prolonged Instagram use affects users’ emotions, the magnitude of this effect depends on the frequency of users’ social comparisons. These results can inform the design of systems to improve mental well-being on SNS.
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