• Journal of IKEEE
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• v.22 no.2
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• pp.289-301
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• 2018

IIoT, the IoT technology applied to the industrial field, is being used as a monitoring technology for increasing in production rate and safety of workers. However, monitoring through the construction of IIoT network using Ethernet and RS485 in production lines where dozens to hundreds of machine tools are manufacturing components, have difficulties of infrastructure cost and network flexibility and fluidity. Therefore, in this paper, using IEEE 802.15.4 standard WSN device to construct a Ad-Hoc WSN in the production line. In addition, the transmission period and order of the sensor nodes are set by applying the EtherCAT communication method in which the payload frames are shared by all the sensor nodes. From this, we have overcome the problem of reliability decline and real-time issue due to the packet collision of wireless network and confirmed that it is a wireless network routing method that can be used in the actual industrial field.

• Journal of the Economic Geographical Society of Korea
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• v.4 no.2
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• pp.37-56
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• 2001

Regarding human capital development and the competitive advantage of regional economies, the transfer of local university graduates to the local labor market is a very important factor. This study aims to investigate the employment structure of university graduates and spatial patterns of their jobs, and the job search strategies to enter the employment system with a case study of Chonnam National University graduates. Because of the lagged industrial structure and peripheral location of Kwangju/Chonnam Province, the employment rate of the university graduates is generally lower than a national average. And there is a strong tendency of the concentration of job places on the metropolitan areas on the one hand, and on the Kwangju/chonnarn and Capital region of Korea on the other. University graduates in searching for jobs especially prefer spatial mobility toward job opportunities In other regions to promoting the flexibility of job qualifications to meet labor market demands. Based on the results of the study, we can identify a process of so-called train drains'in both quantitative and qualitative terms, and conclude that the role of the Chonnam National University in promoting regional development potentials and local labor market conditions is Quite restrictive.

• Korean journal of food and cookery science
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• v.25 no.1
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• pp.119-125
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• 2009

This study was conducted to promote fish paste made with white poria cocos wolf powder as a food. The tested concentrations of the powder were 0, 1, 3, 5, and 7%. All the fish paste samples had 37% water content. For the Hunter color values of samples, L-values decreased but a- and b-values increased with increasing concentrations of the powder. In addition, the folding test scores of all samples were good (AA). In the texture tests, brittleness increased where as springiness decreased with increasing concentrations of the powder. In the sensory evaluations, color, flavor, hardness, and cohesiveness scores increased, and sleekness and oily taste scores decreased, with increasing concentrations of the powder. The fish paste containing 3% white poria cocos wolf powder (3WPWP) had the highest acceptance scores for appearance, flavor, taste, texture, and overall quality. These results suggest that white poria cocos wolf powder can be applied to fish paste to increase its quality.

• Journal of The Korean Society For Urban Railway
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• v.6 no.4
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• pp.279-286
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• 2018

Recently, a safety control platform to monitor the safety of train operation in real time and prevent accidents and risks through control is under study. In the initial design, DDS communication method supporting distributed network is adopted for real-time processing of large amount of data according to the integration of existing distributed safety data. However, communication between server and console inside the safety control platform is applied to existing TCP socket communication. In the case of TCP socket communication, it is possible to process data for a small system of a safety control test bed by one-to-one communication. However, if the data is expanded all over the country in the future, it becomes difficult to cope with a case where communication traffic occurs due to vast amount of data. In this paper, we propose DDS communication method to support distributed network between server and console of security control platform, and demonstrate TCP socket and DDS method, and compare throughput and speed. As a result, we have found that the scalability and flexibility are improved in case of applying DDS communication to future systems.

• Korean Journal of Comparative Education
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• v.21 no.4
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• pp.1-27
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• 2011

The purpose of this study is to explore some policy implications for improving the faculty personnel management and their salary scheme of the Korean national universities through comparing the systems and practices of Korean national universities to those of OECD countries. The fact that many leading OECD countries in higher education arena have been taking decentralized contract-based system based on institutional autonomy and performance beyond the previous bureaucratic control model casts some significant implications for the Korean national university reform. Especially, concerning on personnel management, it is necessary to provide more flexibility in managing faculty personnel categorization and expansion of faculty quota management for faculty and to review the maintenance of faculty's legal status as civil servant. In addition, regarding the salary scheme of faculty, we suggested performance-based salary scheme with plus-sum methods, settlement of rational faculty performance evaluation system and practices, and need for some aligning efforts for changing faculty salary scheme of the national universities.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.23 no.6
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• pp.97-102
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• 2023

This study is to provide improvement of tester for IoT system, which has recently become diversified and large-scale and It is about a method to improve the packet processing performance of the tester and securing flexibility in traffic protocol creation and operation. The purpose of this study is to design a OSS DPDK-based high-speed IoT network performance test system, which pre-verifies and measures the performance of data traffic transmission in an increasingly sophisticated high-capacity IoT network system. The basic structure of the high-speed IoT performance tester was designed using a DPDK-based traffic generator, the expected effect was suggested to traffic modeling and packet generation capability when the system was applied through experiments

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.26-29
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• 2017

최근 중앙 집중화된 대규모 클라우드 시스템의 증가로 인해 가상화 환경에서 수행되는 성능 최적화 작업에 대한 많은 연구가 진행되고 있다. 그러나 기존 연구에서는 자원 분배의 공정성을 위해 가상머신 단위로 컴퓨팅 자원을 격리한 정책 내에서 이루어지고 있어 유연한 자원관리에 한계를 가지고 있다. 본 연구에서는 워크로드의 특징을 기반으로 과학적 연산을 수행하는 가상머신과 일반적인 서비스를 수행하는 가상머신을 분류하여 성능 최적화 작업을 수행하는 동적 자원 관리자를 제안한다. 실험을 통하여 제안하는 동적 자원 관리자가 KVM 기본 스케줄링에 비해 49%의 성능 향상을 보였다.

• Electronics and Telecommunications Trends
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• v.21 no.6 s.102
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• pp.44-52
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• 2006

BcN 백본망은 데이터 트래픽의 생존성 보장과 다양한 서비스를 유연하게 수용하기 위해 다이내믹하게 운용할 수 있어야 한다. 이와 같은 요구사항을 만족하기 위해 광 스위치를 도입하고, 파장 단위의 경로 설정 및 해제를 자동으로 이루어지도록 하는 ASON개념이 적용된 광 회선 분배 시스템이 개발되고 있다. 최근의 광 회선 분배 기술은ROADM을 중심으로 메트로 망에 도입되고 있으며, 특히 제어평면의 도입에 의해 원격프로비저닝 및 자동 망 구성이 가능하게 되었다. 기술적인 측면에서는 PLC 기반의 광스위치를 채택한 1세대 ROADM 시스템에서 WSS 기반의 광 스위치를 채택한 2세대ROADM으로 이동하고 있으며, 이것이 자연스럽게 PXC로 진화할 것으로 보인다. 경제적인 측면에서는 IPTV 등 새로운 서비스를 지원하기 위하여 대규모 시스템 도입이 본격화되고 있으며, 국내의 경우에도 1-2년 내에 상용화 및 시장 진입이 예상되고 있다. 본 고에서는 이러한 광 회선 분배 기술의 전달평면 및 제어평면 기술과 시장 현황 및 향후 전망에 대하여 알아본다.

• Proceedings of the Korea Contents Association Conference
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• 2010.05a
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• pp.158-160
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• 2010

이 연구의 목적은 여성의 리듬운동 참가와 신체이미지 및 자아존중감의 관계를 규명하는데 있다. 본 연구는 2009년 서울 경기도 지역 2009년 서울 경기도지역에 소재하고 있는 스포츠센터, 일반동호회, 지역동호회, 댄스학원, 일반인을 대상으로 리듬운동에 참여하고 있는 20~50대 성인여성을 모집단으로 설정한 다음, 집락무선표집법을 이용하여 300명을 추출 하였다. 결론은 다음과 같다. 첫째, 리듬운동 참가여성은 비참가여성에 비해 신체이미지 및 자아존중감을 더 긍정적으로 평가한다. 둘째, 리듬운동 참가기간은 체형, 만족, 유연성요인에 영향을 미치고 있으며, 참가강도는 체형과 근력요인에 영향을 미친다. 셋째, 리듬운동참가기간은 자아존중감에 영향을 미치며, 참가빈도는 부적 영향을 미치는 것으로 나타났다. 넷째, 여성의 리듬운동 참가정도는 신체이미지 그리고 자아존중감에 인과적 영향을 미친다.

• Journal of Preventive Medicine and Public Health
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• v.3 no.1
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• pp.47-49
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• 1970

Laboratory susceptibility tests with various insecticides against houseflies(Musca domestica L.) were simultaneously conducted with larvae. As a result of these experment the following conclusion has been obtained. 1. The relative ratio to various insecticidal effects were naled>DDVP>diazinon>${\gamma}-BHC$>malathion>dieldrin>DDT in houseflies larvae. 2. It was noted that resistance to various insecticides in larvae was in proportion to resistance in adults.