• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.11
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• pp.2465-2473
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• 2011

This paper describes a circuit-level optimization of DFU(decoding function unit) for LDPC decoder which is used in wireless communication systems including WiMAX and WLAN. A new design of DFU based on sign-magnitude arithmetic instead of two's complement arithmetic is proposed, resulting in 18% reduction of gate count for 96 DFUs array used in mobile WiMAX LDPC decoder. A multi-mode LDPC decoder for mobile WiMAX standard is designed using the proposed DFU. The LDPC decoder synthesized using a 0.18-${\mu}m$ CMOS cell library with 50 MHz clock has 268,870 gates and 71,424 bits RAM, and it is verified by FPGA implementation.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.45 no.9
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• pp.65-70
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• 2008

In FIR filter design, multipliers occupy most of the area. To efficiently reduce the area occupied by multipliers, Common Subexpression Elimination (CSE) algorithm can be used instead of separate multipliers. However, the filter computation time can be increased due to the long carry propagation in CSE circuits. More specifically, when the difference of weights between the two inputs to an adder in CSE circuits is large, long carry propagation time is required due to large sign extension. In this paper, we propose a sign-extension reduction method in common subexpression elimination circuit. By Synopsys simulation using Samsung 0.35um library, it is shown that the proposed method leads to 17%, 31% and 12% reduction in the area, time delay and power consumption, respectively, compared with conventional method.

• Journal of the Korean Society for Library and Information Science
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• v.29
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• pp.45-62
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• 1995

'Vow by Five Meritorious Subjects' was drawn up in November 14 of the second year of King Sejo's reign. The document was a pledge taken by King Sejo's son, Prince Chang, and the King's five meritorious officers in charge of national foundation (개국공신), affairs(정사공신), national defense(좌명공신), national security(정난공신), national building(좌익공신), and their offsprings in an attempt to consolidate their political power and to eliminate the opposition after having forged their coup as if King Tanjong abdicated his throne in favor of King Sejo. The signatories to this document numbered 137 persons whereas non-signatories were 83. It appears that those 83 non-signitorious were unabled to sign the vow for they were not present at the signing ceremony which followed the drafting of the document because all of them had, later on, been promoted to advice King Sejo.

• Journal of the Korean Society for Library and Information Science
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• v.48 no.2
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• pp.25-44
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• 2014

This research evaluates the accessibility of the mobile applications for the South Korean libraries based on the accessibility guideline from the Ministry of Security and Public Administration. In order to enhance the credibility of the evaluation, this current research covers both the accessibility for the visually impaired and the accessibility for the people without disabilities. The research found four main results. First, we found that only 21 libraries (31%) provide alternative texts. Out of the 21 libraries, only one provide alternative texts across all sections of the mobile applications, including the main page, data search, information assistance, etc. Second, most of the mobile applications provide contents in texts, and the subtitles, sign language, blinking and background music provided as required or recommended standard by the guideline lack correlation. Third, alternative texts, focus movement, accessibility of operating system, button motion control, spacing between control and alarm functions must follow the standard guideline for the people with disabilities to use the mobile applications. Fourth, follow-up research on the development of accessibility standard for library mobile application is necessary in order to enable people with disabilities to freely use the library mobile applications.

• The Journal of the Korea Contents Association
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• v.15 no.1
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• pp.300-307
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• 2015

The purpose of this review was to evaluate the effects of diabetes management program using mobile appllication. A systematic review using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses: the PRISMA Statement was conducted. Studies published between 2004 and 2014 were reviewed using the following databases: Ovid, CINAHL and Cochrane library. The keywords used were (app*OR mobile) AND (nurs* OR health* OR medic*) AND (diabet*). Selected studies were assessed for methodological quality using Scottish Intercollegiate Guidelines Network (SIGN)' Checklist. Three hundred seventy five studies were identified, All the 3 studies found mobile application as a valid strategy on clinical usefulness in diabetes management. This review provides updated evidence for app-based management program in diabetes management. Further studies are needed to increase generalizability using randomized controlled trials, enough sample size. In addition, valid measurements are needed to assess the main outcomes.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.22 no.4
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• pp.275-299
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• 2011

This study investigated librarians' perception and preference of cultural programs in the field of cooperation between school and public libraries. The findings are as follows: 1) Librarians and teacher librarians at school and public libraries perceive the importance of cultural programs in library service. 2) Online space was mostly preferred as a means of PR activities by librarians and teacher librarians at school and public libraries. 3) The preferred methods to cooperate projects between school libraries and public libraries were to implement programs through public librarians' field visiting, and to participate linkage program customized to individual school libraries. 4) Preferred types of cooperation were to sign MOU and to make a cooperative system between school libraries and public libraries.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.7 no.1
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• pp.231-246
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• 1994

A major problem for information retrieval research in the past three decades has been methodology, even though some progress has been made in obtaining useful results from methodologically sound experiments. Within a methodology, potential problems include artificial data generated by the researcher, small sample size interpretation of findings. Critics have pointed out that some room exists for improving methodology of information retrieval research; using existing data, having big enough sample size, including large numbers of search queries, introducing more control in relation to variables, utilizing more appropriate performance measures, conducting rests carefully and evaluating findings properly. Relevance judgments depend entirely on the perception of the user and on the situation of the moment. In an experiment, the best judge of relevance is a user with a well defined information need. Normally more than two categories for relevance judgments are desirable becase there are degrees of relevance. In experimental design, careful control of variables is meeded for internal validity. When no single database exists for comparison, existing operational databases should be used cautiously, Careful control for the variations of search queries, inter-searcher sonsistency, intra-searcher consistency and search strategies is necessary. Parametric statistics requiring rigid assumptions are not appropriate in information retrieval research and non-parametric statistics requiring few assumptions are necessary. Particularly, the sign test and the Wilcoxon test are good alternatives.

• Journal of the Korean Society for Library and Information Science
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• v.56 no.4
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• pp.29-49
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• 2022

The book is a footnote of life and memory, a sign of knowledge and intelligence, including divinity and reason, idols and destruction, praise and curse, arrogance and prejudice, truth and falsehood. The past emperors, monarchs, priests, and rulers have been controlled or slaughtered by censorship and prohibition, burning and destruction, etc. In ancient history, archaeology, war history, cultural history, and library and information science, many studies have been conducted on the burning and destruction of books, but the Western perspective is dominant, and there are nationalistic approaches and logical leaps. This study traced the truth about the destruction of the Royal Library of Alexandria in Egypt, destruction of the Baghdad libraries by the Mongol Empire, and burning more than 200,000 volumes of Korean historical documents of Japanese Government-General in Korea among the major bibliocausts with many mysteries and controversial issues in the East and West. As a result, the Royal Library of Alexandria is most likely destroyed under the rule of the Roman Empire. The massacre of the Baghdad library by the Mongolian army is a historical fact, not the manipulation and extreme exaggeration of western society. And Korean historical documents have been stolen and burned by the Government-General of Chōsen for 35 years and should be recognized as '200,000 + α'. Lastly, On the premise of excavating historical materials, research to investigate the truth behind the blibiocaust or libricide should be continued.

• Journal of Korean Library and Information Science Society
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• v.45 no.2
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• pp.283-309
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• 2014

A rhetorical segment in traditional abstract displaying a sign of particular function is frequently referred to as a move. One of the most common moves is the Background, Aim, Method, Results, and Conclusion (BAMRC). The objective of this paper is to investigate the move patterns of research article abstracts in the field of social sciences based on BAMRC moves. Using the Scopus bibliographic database, a total of 467 abstracts from 298 research journals in the field of social sciences were analyzed. The result showed a wide range of move patterns. The implication of the result of this study suggests the existing traditional abstracts in social sciences might not be sufficiently "informative" due to missing moves and due to various move orders. To this end, automatically mapping moves in traditional abstracts to sub-headings in structured abstracts can be a more challenging task, requiring additional procedures to resolve these types of compatibility issues. Future studies can compare this study's result to other fields or disciplines within social sciences in order to find a more precise nature of abstracts in the field of social sciences.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.2
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• pp.363-371
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• 2013

This paper describes a multi-standard LDPC decoder which supports 19 block lengths(576~2304) and 6 code rates(1/2, 2/3A, 2/3B, 3/4A, 3/4B, 5/6) of IEEE 802.16e mobile WiMAX standard and 3 block lengths(648, 1296, 1944) and 4 code rates(1/2, 2/3, 3/4, 5/6) of IEEE 802.11n WLAN standard. To minimize hardware complexity, it adopts a block-serial (partially parallel) architecture based on the layered decoding scheme. A DFU(decoding function unit) based on sign-magnitude arithmetic is used for hardware reduction. The designed LDPC decoder is verified by FPGA implementation, and synthesized with a 0.13-${\mu}m$ CMOS cell library. It has 312,000 gates and 70,000 bits RAM. The estimated throughput is about 79~210 Mbps at 100 MHz@1.8v.