• Journal of KIISE:Information Networking
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• v.33 no.6
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• pp.451-460
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• 2006

In HMIPv6, the nested mobile network because of the mobility of node and router can be constituted. Many subnets exist and many mobile router(MR)s and mobile node(MN)s activate in the nested mobile network. If the nested depth is deeper, the number of mobile router that packet goes through, increases and data transmission delay owing to this might be larger. This paper proposes EPA algorithm which finds out the path from Mobility Anchor Point(MAP) to a destination mobile node using the binding cache information of MAP and processes the path information by adding it to packet header. If we apply EAP algorithm, the quantity of unnecessary packet within MAP domain can be decreased. Also, the transmission delay can be decreased in a intermediate mobile router because it supports packet re-transmission just by simple packet substitution.

• Korean Journal of Ecology and Environment
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• v.52 no.1
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• pp.9-12
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• 2019

The red-eared slider (Trachemys scripta elegans) is the one of the most popular pets, and the most commonly traded species in the world. It is designated as an ecosystem disturbance species that has been managed in South Korea. To date, no reports of natural or anthropogenic migration and spreading of T. s. elegans in South Korea are available. In the present study, we estimated the expected route and the movable path of one female T. s. elegans found in Namsan-myun, Gyeongsan-si, Gyeongsangbuk-do. Based on the movable path, the potential destination of the female turtle was estimated to be about 282 m and 468 m away. Therefore, the moving distance of the red-eared slider to the nearest water system will be at least 606 m and at most 792 m. Our results provide the first evidence about the natural migration and spreading of exotic turtles. This study can serve as a basis for the management and countermeasures against the introduced of T. s. elegans and other exotic species in South Korea.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.59-60
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• 2023

The automation of container terminals is an important factor that determines port competitiveness, and global advanced ports tend to strengthen their competitiveness through container terminal automation. The operational efficiency of the AGV, which is an essential transport equipment of the automated terminal, can improve the productivity of the automated terminal. The operation of AGVs in automated container terminals differs from that of conventional container terminals, as it is based on an automated system in which AGVs travel along designated paths and operate according to assigned tasks, requiring consideration of factors such as workload, congestion, and collisions. To prevent such problems and improve the efficiency of AGV operations, a more sophisticated model is necessary. Thus, this paper proposes an AGV scheduling model that takes into account the AGV travel path and task assignment within the terminal The model prevent the problem of deadlock and. various cases are generated by changing AGV algebra and number of tasks to create AGV driving situations and evaluate the proposed algorithm through algorithm and optimization analysis.

• Journal of the Economic Geographical Society of Korea
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• v.26 no.2
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• pp.73-95
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• 2023

The purpose of this study is to analyze the industrial structural changes and types of specialized in the shipbuilding cities, which are representative sectors of industrial city decline, and explore regional responses. Most cities designated as special areas for industrial crisis response in 2018 are specialized in shipbuilding. While the shift from prosperity to recession since the 2010s is the main factor, each city has responded differently to the industrial crisis. The analysis, targeting seven shipbuilding cities, shows that regions where large shipyards of major corporations with high industrial competitiveness are located have relatively less decline during business fluctuations, and there is a tendency for a decrease in industrial structural diversity during prosperous periods and an increase during recessionary periods. Based on the resistance and recoverability to industrial crises, the industrial paths of shipbuilding cities are classified into four types. Considering regional industrial structure and competitiveness, it is necessary to develop customized support strategies such as maintaining and declining shipbuilding industries and fostering new alternative industries.

• Journal of Life Science
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• v.29 no.1
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• pp.123-128
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• 2019

The use of 16S rDNA is commonplace in the determination of prokaryotic species. However, it has limitations, and there are few studies at the genus level. We investigated conserved genes and metabolic pathways at the genus level in 28 strains of 13 genera of prokaryotes using the COG database (conserved genes) and MetaCyc database (metabolic pathways). Conserved genes compared to total genes (core genome) at the genus level ranged from 27.62%(Nostoc genus) to 71.76%(Spiribacter genus), with an average of 46.72%. The lower ratio of core genome meant the higher ratio of peculiar genes of a prokaryote, namely specific biological activities or the habitat may be varied. The ratio of common metabolic pathways at the genus level was higher than the ratio of core genomes, from 58.79% (Clostridium genus) to 96.31%(Mycoplasma genus), with an average of 75.86%. When compared among other genera, members of the same genus were positioned in the closest nodes to each other. Interestingly, Bacillus and Clostridium genera were positioned in closer nodes than those of the other genera. Archaebacterial genera were grouped together in the ortholog and metabolic pathway nodes in a phylogenetic tree. The genera Granulicella, Nostoc, and Bradyrhizobium of the Acidobacteria, Cyanobacteria, and Proteobacteria phyla, respectively, were grouped in an ortholog content tree. The results of this study can be used for (i) the identification of common genes and metabolic pathways at each phylogenetic level and (ii) the improvement of strains through horizontal gene transfer or site-directed mutagenesis.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10a
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• pp.771-773
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• 1998

광선 추적법(Ray-Tracer)은 물체에 직.간접적으로 영향을 미치는 빛의 반사 및 굴절 경로를 역추적함으로써 실제감있는 이미지를 생성하는 렌더링(rendering)기법이다. 이러한 광성 추적법을 장시간의 계산을 필요로 하는 단점이 있으나. 각각의 광선을 병렬적으로 추적함으로써 속도의 향상을 피할 수 있다. 본 논문에서는 자바를 사용하는 메시지 기반 병렬 프로그래밍 시스템인 JPVM 상에서 동작하는 병렬 광선 추적기를 구현하였다. 병렬 광성 추적기를 사용자에 의해 지정된 장면 정의 파일(Scene Defintion File)을 읽어 들여 피싱(parsing)한후, 생성된 장면 객체를 각 worker프로그램에게 전송한다. 병렬 광선 추적기는 전체 화면 영역을 분활하여 각 worker 프로그램에 할당하며, worker프로그램들은 자신에게 할당된 영역의 이미지를 병렬적으로 생성한다. 실험 결과, 병렬 광선 추적기는 단일 광선 추적기에 비해 빠르게 렌더링을 수행하였으며, worker프로그램의 수가 증가함에 따라 수행 속도가 향상되었다.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06a
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• pp.313-315
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• 2011

인터넷의 급속한 발달로 빈번히 발생하고 있는 해킹 및 악성프로그램과 같은 사이버 공격으로부터 중요 정보를 보호하기 위한 망분리 기술이 요구되고 있다. 망분리에는 외부와 내부망을 물리적으로 분리하는 물리적 망분리와 가상화 기술을 이용하여 분리하는 논리적 망분리가 있다. 물리적 망분리는 망구축 및 유지비용이 높으며, 논리적 망분리는 보안 신뢰성이 낮다. 제안하는 LNP는 사이버 공격을 대응할 수 있는 논리적 망분리 방안으로 트래픽 유형을 탐지하여 망을 분리하고, 위협 요소 제거 시 망분리를 해제한다. 논리적으로 망을 분리하는 LNP는 트래픽 경로를 차단하여 중요 정보를 안전하게 보호할 수 있다.

• Proceedings of the KIEE Conference
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• 1999.11c
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• pp.833-835
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• 1999

지연 고장 테스트는 디지털 회로의 정확한 동작을 보장하기 위해서 필수적이다. 그러나 순차 회로에는 상태 레지스터들이 존재하기 때문에, 지연 고장을 검출하는 것이 쉽지 않다. 이러한 난점을 해결하기 위해 본 논문에서는 역기능적 지정 방법을 좀 더 효율적으로 적용할 수 있는 테스트 알고리듬을 제안한다. ISCAS89 벤치마크 회로에 대한 실험 결과, 테스트 가능한 경로의 수를 기존의 스캔 기법들에 비해 크게 향상시킬 수 있다는 것을 알 수 있다.

• 동물약계
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• no.109
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• pp.4-8
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• 2007

한국동물약품협회 김진구 회장 취임/동물약사감시 행정처분 결과 홍보/동물약사심의위원회 위원 추천/동물용의약품등 자율점검제 실시 결과/2007년도 병역지정업체 산업기능요원 배정/동물용의약품 PL 단체보험 계약 갱신/농업연수원 교육훈련 수요 조사/VIV ASIA 2007 산업자원부 지원대상 선정/수출촉진협의회 개최/제1차 이사회 개최/협회 품목신고 요령 설명회 개최/검역원 동물약품 간담회 및 공청회 참석/제2차 이사회 개최/제15차 정기총회 개최/식약청 잔류동물용의약품 전문위원회 참석/동물약품 제조용 할당관세 적용 유당 배정/동물용의약품 등 제조업체 현황/동물용의약품 등 수입자 현황/국내생산 동물용의약품 연도별 판매 현황/국내생산 동물용의약품 연도별 수출 현황/수입완제 동물용의약품 연도별 판매 현황/동물용의약품 연도별 내수 시장 규모/동물용의약품 약효별 허가(신고) 현황/내수 유통경로별 판매 현황(원료제외)/축종별 판매 현황(원료제외)/원료 동물약품 원산지별 수입 현황/완제 동물약품 원산지별 수입 현황

• Journal of Korean Institute of Industrial Engineers
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• v.34 no.3
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• pp.289-295
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• 2008

The shared-route decision algorithms in multicasting communications networks to provide the internet-based services such as IPTV, remote education/health, and internet broadcasting are presented. The three main measures of maximum delay, average delay and estimated delay between each node and member are adopted. Under the Mesh network with the uniform random cost between each node, the algorithm's performance is compared to the optimal solution with the minimum cost by all enumeration. The simulation results show that the algorithm using the estimated delay outperforms the other two methods.