• Journal of the Korean Society for information Management
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• v.26 no.4
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• pp.93-112
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• 2009

Recently in the area of the information environment, there are lively discussions about search 2.0 which is representative of the next generation search services. In this study, we divide information search model into matching and linking models according the developmental stages. Therefore, on the one hand, we analyze the background, main concepts, related attributes and cases of the next generation search services and the other, we identify the representative keywords by the group analysis of various attributes and cases of it. The result shows that the main keywords such as social search, artificial intelligence and semantic search, and relation/network based search are representative of the search 2.0.

• Korean journal of applied entomology
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• v.29 no.4
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• pp.230-237
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• 1990

Studies were carried out to examine seasonal occurrence and emergence pattern of the onion fly, Delia antiqua (Meigen), in the field of Chinju city in Gyeongnam province from 1984 to 1987. Trap catch revealed that the onion fly had three generations in a year, the second flight being partial; the peaks of adult occurrence were at mid April for the overwintered generation (1st flight), at early June for the first generation (2nd flight), and at the period from late September to early October for the autumn generation (3rd flight). It was shown that parts of the pupae in the first and almost all of the pupae in the second (or autumn) generation underwent summer diapause. The pupal periods were less than 22.4 days for the non-diapaused pupae, while those of the diapause. The pupal periods were less than 22.4 days for the non-diapaused pupae, while those of the diapaused pupae were form 8.5 to 145 days in the first generation in he filed, being shorter for the pupae pupated later. This resutled in synchronization on the emergence of these diapaused pupae at late September, with the adults from the second generation pupae. The ratio of diapausing pupae increased among the later pupated ones in the first generation ; the pupae which had been pupated in early May included 43.8% of diapausing pupae, while more than 86.7% of the pupae were under diapausing state for the pupae pupated in late May and thereafter. More than 93.3% of the pupae went into diapause, regardless of pupation time for the second generation.

• The Transactions of the Korea Information Processing Society
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• v.2 no.4
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• pp.509-523
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• 1995

With the diversified and enlarged softwares, the issue of software maintenance became more complex and difficult consequently, the cost of software maintenance took up the highest portion in the software life cycle. At the same time, in order to develop or use software for general computers the development environment will be changed to incorporate user-friendly 4GL (Fourth generation Language). Therefore, it is required to take a closer look at the languages such as COBOL, C, FORTRAN, PASCAL which have source code comprised of 4GL and investigate the method of analysis and reuse for program understanding since a lot of research has been done with these languages in program maintenance. The purpose of this paper is to propose reverse engineering tool in 4GL and find an effective way of understanding and maintaining the program by transforming source code comprised of 4GL to meta language and designing and implementing Document Generator, Report Generator, Module Generator, Code Translator for program understanding.

• The Journal of the Korea Contents Association
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• v.7 no.10
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• pp.10-18
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• 2007

Today, third-generation(3G) of mobile communication service executing the video and TV. And low cost, high speed data rate will emerge communication of the fourth generation(4G) in future. So, in this paper we studied occupied frequency bandwidth of common technique criteria among the technique criteria for the 4G mobile communication of FDD-based on Up/Down-link. The mobile communication traffic is predicted Up/Down-link of non-symmetric in future. So we proposed the PHY layer parameters of occupied frequency bandwidth of Up/Down-link with both 1:3 and 1:6. We also verified this through the simulation. We proposed the occupied frequency bandwidth for the 4G mobile communication in this paper.

• Korean Journal of Social Welfare
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• v.64 no.4
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• pp.285-310
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• 2012

This study examined the causal relationship of between stressors and depression using the wave 1~4 of Korean Welfare Panel Study by social stress theory. According to the result, the level of depression and depressed group was decreased in the course of time. As a panel regression analysis, Factors affecting the reduction of depression was upward of the income hierarchy, increase the satisfaction of family and social relationships, and residential satisfaction. Based on the results, the author suggested that social work policies and intervention direction should decrease social stress factors with causality to depression of the men in baby boom generation.

• 한국해양학회지
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• v.30 no.2
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• pp.138-146
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• 1995

Present study was performed to describe the growth of Leptochela gracilis (STIMPSON, 1860), the dominant species of the coastal water near Kanghwa Island, Korea. Samples were collected from 1 sampling point by long bag seine net at monthly interval from April 1993 to January 1994 except for August 1993. In the population study of Leptochela gracilis, ovigerous female has appeared from April to September 1993 and the ratio (egg-bearing female/female) showed over 70% from May to July 1993. Female individuals were predominant from May 1993 to January 1994 and it was found that sex ratios were not significantly different between pregnant and non-pregnant period(p>0.05). The population of Leptochela gracilis was divided into 2 types of generation; i) short term generation. and ii) long term generation. Longevity of the long term generation was presumed to vary from 12 to 15 months. In the case of short term generation, spawned by egg-bearing stock of September, however, it was not certain whether they absorbed in the long term generation, thus overcome winter season or die after December by environment factors. The growth in cavalcade length of the long term generation was better fitted to Pauly and Gaschutz model than Von Bertalanffy.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.7A
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• pp.730-737
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• 2007

The new wireless multimedia environment is coming because of the variety of an user requirement and a traffic increase which we can not accept in the IMT-2000 present systems. To offer the wireless multimedia service the world wireless communication company which included the ITU-R is developing the standard and technique of 4G systems. We analyzed the technique criteria of the 4G wireless communication system in this paper which is based on that of WiBro System. We referred to the technique criteria of the WiBro system and deduced an occupied frequency bandwidth which is the common element of the uplink and downlink system among main wireless communication technique criteria. And we verified this through the simulation. So we proposed the occupied frequency bandwidth for 4G wireless communication in this paper.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2015.07a
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• pp.484-485
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• 2015

세계적인 디지털 방송 전환과 더불어 방송 기술의 비약적인 발전은 HD(High Definition) 방송 시대를 넘어 UHD(Ultra High Definition) 방송 시대를 개막하였으며, UHD를 비롯한 다양한 차세대 방송 기술들이 개발되고 있다. 이러한 변화에 따라 차세대 방송 기술의 선점을 위한 유럽의 DVB 2.0, 미국의 ATSC 3.0, 일본의 ISDB-Tmm과 같은 최신의 방송 표준이 제정되 거나 제정을 준비하고 있다. 국내의 차세대 방송 원천 기술에 대한 연구 개발이 어느 때보다도 시급한 상황이다. 본 논문은 방송 통신 융합환경 하에서 초고화질 콘텐츠를 전송할 수 있도록 하는 차세대 융합방송 프로젝트의 일환으로 유럽의 차세대 디지털 방송 시스템에 적용된 MPLP 기법을 분석하고, 해당 기법을 적용하여 지상파 방송망을 통해서 HD 및 4K UHD 서비스를 다중화하여 변조시스템에 전송하는 다중화 시스템의 구조를 제안한다.

• Electronics and Telecommunications Trends
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• v.21 no.3 s.99
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• pp.11-22
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• 2006

이동통신 시스템은 현재의 3세대 IMT-2000 시스템에 이르기까지 지속적인 진화를 거듭하였고 이제 사용자의 다양한 이동통신 서비스 요구 및 기대치를 충족시키기 위한 4세대 이동통신 시스템 및 서비스에 대한 관심이 지속적으로 증가하고 있다. ITU-RWP8F에서는 "보다 빠른 데이터 전송속도의 지원"과 "서로 다른 유무선 접속 시스템과 융합(convergence)"을 목표로 시간과 장소 및 대상의 구속이 없이 언제 어디서나 누구와도 고속 멀티미디어 통신 서비스를 지원하는 것을 차세대 이동통신 시스템의 비전으로 설정하고 있다. 이러한 차세대 서비스 비전을 실현하기 위하여 현재 WWRF, WWI, FMS, mITF, FuTURE Forum 및 NGMC Forum과 같은 주요 연구 단체는 개인의 관심사, 환경, 일상 생활이 고려된 각 개인의 통신 공간에서 상황에 따라 변화하는 개인의 요구사항이 반영된 차세대 서비스에 대한 연구를 수행하고 있다. 본 논문에서는 앞서 언급한 각 연구 단체가 수행중인 주요 연구 내용을 살펴보고자 한다.`

• Journal of Korean Home Economics Education Association
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• v.25 no.4
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• pp.99-111
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• 2013

The purpose of the present study was to examine the causal effects of the family health of baby boomer parents as a determinant of marital preparation skills of eco-boomer children. Subjects in this study consisted of 475 students born before 1992, and whose parents were born from 1955 to 1963. The programs of SPSSWIN 18.0 and LISREL 8.51 were used for data analysis. The result of this study showed that the financial management skills of saving and consumption were the lowest of marital preparation skills of echo-boomer generation. Besides, baby boomer parents' family health perceived by their children was found to be the determinant of the marital preparation skills of eco-boomers. Particularly, the effect of family health was shown to be high on parental role skill, conflict resolution skill, and parenting preparation skill of marital preparation skills, whereas it was revealed to be relatively low on financial management skill. Findings of this study can be used in developing educational programs of marital preparation skills for eco-boomers.