• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.223-225
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• 2013

For a long time, Relational Databases have been widely used in many enterprises. Even though the Relational Databases have merits such as excellent power of data preservation, concurrency controlling as a standard model in databases, there are a demerit in the inconsistency of objects and relations. Against this backdrop, NoSQL is being magnified as a new solution for Big Data since it can be operated without any schema. In this paper, we research on not only merits and demerits of Relational Databases but also the comparison between application databases and integrated databases. And then, we define NoSQL for Big Data and check its characteristics.

• Korean Journal of Acupuncture
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• v.28 no.3
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• pp.177-186
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• 2011

Objectives : The aim of this study is to review clinical trials using Qigong exercise on patients with hypertension and to assess their methodology and results. Methods : Electronic literature searches for clinical trials (randomized trial, non-randomized trial, before-after study) of Qigong exercise were performed in 21 electronic databases (5 international databases and 16 Korean databases). English, Korean or Chinese articles were included. Laboratory or animal studies were excluded. Results : A total of 11 studies met the inclusion criteria. Five randomized controlled trials, Four non-randomized trials and two before-after studies were included. Seven studies used self-developed Qigong exercise. Two studies used Guolin Qigong exercise and two studies used Qigong exercise with an anti-hypertension drug. Of the nine randomized trials or non-randomized trials, four studies used an anti-hypertension drug control and three studies used waiting list controls. Compared to baseline, a change in blood pressure after the Qigong exercise treatment was significant in all studies. However, the results effect of blood pressure between Qigong exercise and controlled trials were not consistent. Conclusions : There are low-quality clinical trials of Qigong exercise for hypertension. To evaluate the effects of Qigong exercise, more rigorous trials are warranted.

• Journal of Korea Multimedia Society
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• v.19 no.9
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• pp.1647-1658
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• 2016

RGB+D database has been widely used in object recognition, object tracking, robot control, to name a few. While rapid advance of active depth sensing technologies allows for the widespread of indoor RGB+D databases, there are only few outdoor RGB+D databases largely due to an inherent limitation of active depth cameras. In this paper, we propose a novel method used to build outdoor RGB+D databases. Instead of using active depth cameras such as Kinect or LIDAR, we acquire a pair of stereo image using high-resolution stereo camera and then obtain a depth map by applying stereo matching algorithm. To deal with estimation errors that inevitably exist in the depth map obtained from stereo matching methods, we develop an approach that estimates confidence of depth maps based on unsupervised learning. Unlike existing confidence estimation approaches, we explicitly consider a spatial correlation that may exist in the confidence map. Specifically, we focus on refining confidence feature with the assumption that the confidence feature and resultant confidence map are smoothly-varying in spatial domain and are highly correlated to each other. Experimental result shows that the proposed method outperforms existing confidence measure based approaches in various benchmark dataset.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.247-249
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• 2013

Even though Relational Databases have been widely used in many enterprises, the relations among entities are not managed effectively and efficiently. In order to analyze Big Data, it is absolutely needed to express various relations among entities in a graphical form. In this paper, we define Graph Databases and its structure. And then, we check out their characteristics such as transaction, consistency, availability, retrieval function, and expandability. Also, we appropriate or inappropriate subjects for application of Graph Databases.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.14
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• pp.373-395
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• 2000

Recently international trade environment has been rapidly changed according to information age. In particular, international trade has been carried out with various ways under the digital revolution. In this regard, the companies are handling their business with the open network internet and doing their critical marketing activities which are very different from the existed trade customs. However, trade-related information database which is necessary to import and export activities is partly built, and there are many issues to be settled down. In other words, electronic trade opportunity website in the field of overseas marketing and customs clearance with EDI(electronic data interchange) are developed, but the database which companies can make use of their businesses is not fully supported. Therefore the structured database should be developed urgently from the stage of opening business to that of payment. This study closely analyzes the databases under the trade procedure, look into the problems of those database and suggest the solutions of trade information databases. Finally this study provides a sort of trade infrastructure for the development of international trade by internet through the building of trade information.

• Journal of the Korean Society for Library and Information Science
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• v.43 no.1
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• pp.293-311
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• 2009

The purpose of this article is to present comparative analysis of electronic information purchase in Korean university libraries relative to university libraries overseas. An overall comparison is made between libraries in Korea and in the U.S. in terms of their budget for electronic information. In addition, we compared the lists of web databases in service among three top-tier Korean universities and nine foreign universities(6 in the U.S., 1 in Canada, 1 in Australia, and 1 in China). The findings show that Korean universities tend to subscribe heavily to electronic journals packages than competing libraries overseas. However, in terms of providing subject-based reference databases, our libraries are far behind even mediocre institutions in these countries. We propose a number of recommendations to strengthen national licensing of electronic scholarly materials as a way to enhance access to electronic information through university libraries.

• ETRI Journal
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• v.32 no.6
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• pp.871-880
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• 2010

Many applications dealing with image management need a technique for removing duplicate images or for grouping related (near-duplicate) images in a database. This paper proposes a concentric circle-based image signature which makes it possible to detect near-duplicates rapidly and accurately. An image is partitioned by radius and angle levels from the center of the image. Feature values are calculated using the average or variation between the partitioned sub-regions. The feature values distributed in sequence are formed into an image signature by hash generation. The hashing facilitates storage space reduction and fast matching. The performance was evaluated through discriminability and robustness tests. Using these tests, the particularity among the different images and the invariability among the modified images are verified, respectively. In addition, we also measured the discriminability and robustness by the distribution analysis of the hashed bits. The proposed method is robust to various modifications, as shown by its average detection rate of 98.99%. The experimental results showed that the proposed method is suitable for near-duplicate detection in large databases.

• Korean Journal of Health Education and Promotion
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• v.30 no.5
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• pp.15-26
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• 2013

Objectives: To present the bases for health education on electronic cigarettes, we analyze the present state of electronic cigarettes. Methods: We applied descriptive study, reviewing the literature from domestic and foreign electronic databases such as National Discovery for Science Leaders and PubMed. Results: Electronic cigarette has been the subject of much controversy but very little study. I reviewed and summed up the definitions, device safety, health risk, smoking cessation effects, addiction, second hand smoke, and regulations of electronic cigarettes. Conclusion: Finally,I presented the evidence-based contents and desirable direction for health education about electronic cigarettes. The results suggested that the health educators focus on the potential addiction to electronic cigarettes, instead of the cessation effects.

• Journal of Korean Library and Information Science Society
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• v.22
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• pp.351-371
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• 1995

This paper intends to describe the concepts and historical development of electronic library, to examine some of information technologies such as CD-ROM, electronic books, multimedia and networks, and to analyze cases of electronic library. Electronic library is able to offer many services in digital form, ranging from bibliographic databases on CD-ROM running on standalone computers, to fully networked abstracts and texts, available inside and outside the library. For users, the electronic library is a means of improving the speed of access to library materials, of providing a simple means of the selecting materials amid the glut of information available, and of eliminating the need to visit a library for many information inquires. In summary, electronic library has the potential to give scholars better service than conventional libraries, at a lower cost. However, remember that, today, almost all these benefits are still potential.

• Journal of the Korean Society for Library and Information Science
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• v.40 no.2
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• pp.457-480
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• 2006

It is essential to conduct an analysis of superior journals, facilitate the international distribution of domestic journals, and determine an effective way to promote a journal's international distribution. This study seeks to determine an effective approach to the international distribution of Korean medical and life science journals and investigates the bibliographies, home pages, and databases about four international distribution factors with regard to 90 journals arranged into three categories. For the effective way of distributing domestic journals internationally, we should develope Korean journals with international standards, record the journals' articles in international and domestic databases, raise the rate of international subscription and holding journals. and publish electronic journals linking their electronic files with many databases.