1,721,028 research outputs found
LSM-Forest: Planting Workload-optimized LSM-trees
No full textBig Data, LSM-tree, Database, Computer System, 빅데이터, 데이터베이스, 컴퓨터 시스템NI. Introduction 1
II. Background & Related Work 4
2.1 Background 4
2.1.1 LSM Tree Key-Value Store 4
2.1.2 Bloom Filter 5
2.1.3 MyRocks 5
2.1.4 Column Family & Multi Tenant 6
2.2 Related Work 7
2.2.1 Iso-KVSSD 7
2.2.2 Kevin 7
2.2.3 Parameter Tuning Using Deep Learning 8
III. Motivation 9
3.1 Problem of the Existing Shared Global LSM-tree 10
3.2 Problems with Existing Parameter Configuration 11
IV. LSM Forest 12
4.1 How to Planting LSM Tree 12
4.1.1 Target Application 13
4.1.2 Per Table Allocation LSM-tree 14
4.1.3 How to optimally allocate LSM-tree for each workload pattern 15
4.2 How to Gardening LSM Tree 16
4.2.1 Configure parameters according to workload characteristics 16
4.2.2 Resource allocate for each LSM-tree according to workload characteristics 19
V. Evaluation 27
5.1 Experimental Setup 27
5.1.1 Evaluation Setting 27
5.1.2 Comparison of each optimization 28
VI. Conclusions 30
References 31MasterdCollectio
Identifying Contemporaneous and Lagged Dependence Structures by Promoting Sparsity in Continuous-time Neural Networks
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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
Woojin CHO#+, Jinyoung PARK, Dong-Hyun CHA
No full textTyphoon Chaba (2016) made landfall on the Korean peninsula and caused record-breaking rainfall in southeastern Korea. In particular, Ulsan metropolitan region experienced a 300-year flood due to 319 mm of rain for 3 hours. The reasons for heavy rainfall induced by typhoon Chaba were possibly associated with mountainous topography in southeastern Korea and warm sea surface temperature (SST) anomaly in the East China Sea. In this study, we investigated the effects of topography and SST anomaly through numerical experiments with high-resolution Weather Research and Forecasting (WRF) model. To verify the topographic effect in southeastern Korea, we set 3 nested domains with horizontal grid spacings of 9-3-1km and conducted the control experiment (CTL) and the reduced topography experiment (TOPO). As a result, the CTL experiment simulated more rainfall on the windward side due to the lifting effect by mountain compared to the TOPO experiment. The air flow in the CTL experiment was mechanically lifted by mountain slopes, and the orographic lifting enhanced precipitation on the windward side. We also conducted the experiment with climatology sea surface temperature in the East China Sea (CSST) to examine the effect of SST anomaly on typhoon-induced precipitation. The CSST experiment simulated less heavy rainfall compared with the CTL experiment because cold climatological SST in the East China Sea led to decreased TC intensity and at landfall time. Therefore, the numerical experiments indicated that heavy rainfall in Korea induced by typhoon Chaba could be enhanced by the effects of intrinsic topography in southeastern Korea as well as warm SST anomaly in the East China Sea
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
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
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