• 한국산학기술학회논문지
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• 제21권8호
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• pp.160-169
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• 2020

이 연구는 공공 행정에서 서비스 전달 조직과 절차를 관리하고 재정을 지원하는 공공부문 사례관리 사업 중 방문건강관리 사업 실무자를 대상으로 타 사례관리 사업과의 연계협력 업무에 대한 경험을 파악하기 위해 실시하였다. 광역시와 시군 소재 보건소 방문건강관리사업 담당자 3명을 대상으로 포커스 그룹 인터뷰를 실시하였고, 자료 수집을 위해 사용한 인터뷰 질문들은 사전에 연구진간 논의를 거쳐 도출한 반구조화 질문지를 활용하였다. 연구 참여자들은 방문건강관리 업무를 수행하면서 경험한 연계협력의 성공과 실패 요인들을 심층적으로 기술하였다. 인터뷰 내용은 질적으로 분석되어 3개의 주제, 9개의 하위주제가 도출되었다. 연구결과, 공공부문 사례관리 사업 간 연계협력 업무안내서는 연계협력을 수행하는 데 있어 긍정적 성과요인이었지만, 방문건강관리 전문 인력의 불안정한 고용문제와 통합시스템의 부재는 연계협력의 장애요인이었으며, 성공적인 연계협력을 위해서는 인적 인프라 강화, 기능적 시스템 개선, 조직적 차원의 방안 마련 등 다각적인 접근이 필요한 것으로 확인되었다. 이에 명확한 연계협력 표준 및 절차 수립, 방문간호 전문인력의 처우 개선, 사례관리 통합정보시스템 개발을 제안한다. 또한, 지역 간 편차가 큰 방문건강관리 사업의 특성을 고려하여 다양한 지역을 대상으로 한 추후 연구가 필요함을 제안한다.

• Asian-Australasian Journal of Animal Sciences
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• 제14권3호
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• pp.302-306
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• 2001

This study was carried out to construct mapping population and to evaluate the methods involved, including polymorphic DNA marker system and appropriate statistical analysis. As an initial step to establish chicken genome mapping project, White Leghorn (WL) and Korean Ogol chicken (KOC) were used for generating backcross population. From 8 initial parents, total 280 backcross progenies were obtained and 40 were used for genotyping and linkage analysis. For development of novel polymorphic markers for KOC, Random Amplified Polymorphic DNA (RAPD) markers specific for this chicken line were generated. Also included in this study were six microsatellite markers from East Lansing map as reference loci. For segregation analysis, 15 RAPD markers and 6 microsatellites were used to genotype the backcross population. Among the RAPD markers that we developed, 2 pairs of markers were identified to be linked and another 4 RAPD markers showed linkage with microsatellites of known map. In summary, this study showed that our backcross population generated from the mating of KOC to WL serves as a valuable genetic resource for genotyping. Furthermore, RAPD markers are proved to be valuable in linkage mapping analysis.

• 한국통신학회논문지
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• 제38C권10호
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• pp.841-851
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• 2013

모바일 RFID/NFC 연동기술이란, 900 MHz 기반의 모바일 RFID 리더와 NFC 리더/태그를 하나의 SoC로 개발하여 USIM 카드에 탑재함으로써 현존하는 2가지 모바일 RFID 서비스를 통합 제공하기 위한 기술을 의미한다. 본 논문에서는 NFC기술과 유사한 서비스를 제공하는 모바일 RFID 기술과 관련 표준을 분석하여 NFC 기술과의 연동 가능성을 파악하고 연동 시 필수적으로 고려되어야 할 연동 요구사항을 도출하였다. 또한 듀얼태그의 도입과 코드체계의 연동을 통해 기존의 인프라를 최대한 활용할 수 있는 연동방안을 제안하였고 연동방안의 연동 요구사항 만족 여부를 분석하였다. 마지막으로 분석된 내용을 바탕으로 서비스 연동 환경 구축에 필요한 새로운 표준 설계의 방향성을 제시하였다.

• 제어로봇시스템학회논문지
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• 제20권9호
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• pp.936-941
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• 2014

Walking mechanisms are very important for legged robots to ensure their stable locomotion. In this research, Klann-linkage is suggested as a walking mechanism for a water-running robot and is optimized using level average analysis. The structure of the Klann-linkage is introduced first and design variables for the Klann-linkage are identified considering the kinematic task of the walking mechanism. Next, the design problem is formulated as a path generation optimization problem. Specifically, the desired path for the foot-pad is defined and the objective function is defined as the structural error between the desired and the generated paths. A process for solving the optimization problem is suggested utilizing the sensitivity analysis of the design variables. As a result, optimized lengths of Klann-linkage are obtained and the optimum trajectory is obtained. It is found that the optimized trajectory improves the cost function by about 62% from the initial one. It is expected that the results from this research can be used as a good example for designing legged robots.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• 제2B권3호
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• pp.125-132
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• 2002

PMSMS (permanent magnet synchronous motors) are widely used in industrial applications and home appliances because of their high torque to inertia ratio, superior power density, and high efficiency. For high performance control, accurate informations about the rotor position is essential. Sensorless algorithms have lately been studied extensively due to the high cost of position sensors and their low reliability in harsh environments. A novel position sensorless speed control for PMSMs uses indirect flux estimation and is presented in this paper. Rotor position and angular velocity are estimated by the proposed indirect flux estimation. Linkage flux and magnetic field flux are calculated by the voltage equations and the measured phase current without any integration. Instead of linkage flux calculation with integral operation, indirect flux and differential magnetic field are used for the estimation of rotor position. A proper rejection technique fur current noise effect in the calculation of differential linkage flux is introduced. The proposed indirect flux detecting method is free from the integral rounding error and linkage flux drift problem, because differential linkage flux can be calculated without any integral operation. Furthermore, electrical parameters of the PMSM can be measured by the proposed TCM (time compression method) for soft starting and precise estimation of rotor position. The position estimator uses accurate electrical parameters that are obtained from the proposed TCM at starting strategy. In the operating region, a proper compensation method fur temperature effect can compensate fir the estimation error from the variation of electrical parameters. The proposed novel position sensorless speed control scheme is verified by the experimental results.

• Agribusiness and Information Management
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• 제3권1호
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• pp.23-37
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• 2011

The development of informatization impacts all sectors, including agriculture. Agricultural informatization builds the knowledge linkage structures of agricultural innovation systems globally. This study investigated the global knowledge linkage structures in agricultural innovation pertinent to information technology (IT) for agricultural research and development (R&D) investments and activities. We explored the longitudinal trend of systemness within the networked research relationships in the triple helix (TH) of the university, industry and government (UIG). We collected data from publications in the Science Citation Index (SCI), the Social Sciences Citation Index (SSCI), and the Arts and Humanities Citation Index (A&HCI) to analyze the TH network dynamics. We also performed a scientometrics analysis to quantitatively identify the knowledge and insights of global agricultural innovation structures. These results could be informative for individual countries. Our findings reveal that the global knowledge linkage structures in the agricultural sector that are pertinent to IT fluctuate widely and fail to increase the capacity of agricultural innovation research due to a neglect of the network effects of the TH dynamics of UIG.

• Molecules and Cells
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• 제20권2호
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• pp.201-209
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• 2005

We have constructed an AFLP-based linkage map of Japanese red pine (Pinus densiflora Siebold et Zucc.) using haploid DNA samples of 96 megagametophytes from a single maternal tree, selection clone Kyungbuk 4. Twenty-eight primer pairs generated a total of 5,780 AFLP fragments. Five hundreds and thirteen fragments were verified as genetic markers with two alleles by their Mendelian segregation. At the linkage criteria LOD 4.0 and maximum recombination fraction 0.25(${\theta}$), a total of 152 markers constituted 25 framework maps for 19 major linkage groups. The maps spanned a total length of 2,341 cM with an average framework marker spacing of 18.4 cM. The estimated genome size was 2,662 cM. With an assumption of equal marker density, 82.2% of the estimated genome would be within 10 cM of one of the 230 linked markers, and 68.1% would be within 10 cM of one of the 152 framework markers. We evaluated map completeness in terms of LOD value, marker density, genome length, and map coverage. The resulting map will provide crucial information for future genomic studies of the Japanese red pine, in particular for QTL mapping of economically important breeding target traits.

• 융합보안논문지
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• 제12권3호
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• pp.67-73
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• 2012

본 논문에서는 지그비를 이용한 무선 기반 센서 네트워크 단점을 극복하기 위하여 유무선 네트워크 연동 기술을 이용한 하이브리드 센서 네트워크 구현 방안을 제시하였다. 제안된 유무선 연동 센서 네트워크는 CATV망에서의 저손실 전송 특성을 바탕으로 실내 무선 환경의 열악한 전송 특성을 보완할 수 있으며, 마찬가지로 동일 주파수 대역의 무선랜과 블루투스의 간섭에서도 자유로울 수 있다. 또한 이미 충분한 인프라가 구축되어 있는 CATV망을 변경없이 사용하고, 기존 무선망의 전송 부정확성에 대한 안정성과 예측 가능한 전송 링크를 제공함으로써 네트워크 설계가 보다 효율적이었으며, 센서 네트워크의 안정성과 높은 신뢰성을 보장하였다.

• 정보관리학회지
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• 제27권2호
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• pp.241-252
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• 2010

본 연구에서는 원문헌의 표제가 문헌클러스터링에서 문헌의 주제를 나타내는데 효과적인 자질로 인식되고 있지만 동의어나 유사어를 포함하여 문헌의 주제를 대표하는데 한계가 있음을 인지하고 인용문헌의 표제로 클러스터링 자질을 확대하는 방안을 제시하였다. 문헌 클러스터링의 자질로 원 문헌의 표제 용어와 인용문헌의 표제 용어, 두 종류의 표제 용어를 혼합하여 적용하여 인용문헌의 표제가 클러스터링 성능을 향상시키는 정도를 측정하였다. 각 자질별로 계층적 클러스터링 기법 3개, within group average linkage, complete linkage, Ward 기법을 결합하여 클러스터를 생성하는 성능을 비교, 분석하였는데 원문헌과 인용문헌 표제어를 혼합하여 within group average linkage 기법으로 클러스터링 한 경우가 가장 좋은 결과를 나타내었다.

• Advances in Computational Design
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• 제7권3호
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• pp.189-210
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• 2022

Deployable structures have the ability to shift from a compact state to an expanded functional configuration. By extension, reconfigurability is another function that relies on embedded computation and actuators. Linkage-based mechanisms constitute promising systems in the development of deployable and reconfigurable structures with high flexibility and controllability. The present paper investigates the deployment and reconfigurability of modular linkage structures with a pin and a sliding support, the latter connected to a linear motion actuator. An appropriate control sequence consists of stepwise reconfigurations that involve the selective releasing of one intermediate joint in each closed-loop linkage, effectively reducing it to a 1-DOF "effective crank-slider" mechanism. This approach enables low self-weight and reduced energy consumption. A kinematics and finite-element analysis of different linkage systems, in all intermediate reconfiguration steps of a sequence, have been conducted for different lengths and geometrical characteristics of the members, as well as different actuation methods, i.e., direct and cable-driven actuation. The study provides insight into the impact of various structural typological and geometrical factors on the systems' behavior.