• 한국농촌건축학회논문집
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• 제18권1호
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• pp.1-9
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• 2016

The purpose of this research is to explore the best examples from Japan to derive spatial and institutional characteristics. This study used the field survey method for 6 elderly welfare facilities in Japan. The characteristics of local friendly facility are as follows; First of all, since elderly care facilities in South Korea are separated from local community and facility plans are large-scaled and unified which are disconnected from local area, this research set aging in community, multi-function, diversity, and intergeneration into the concept that is necessary for local friendly facilities. Secondly, residential environment plan's basic directions are 1) plan that minimizes facilities-like atmosphere, 2) spatial plan that focuses on the elderly dignity and privacy, 3) comfortable and enjoyable communal living space plan, 4) local friendly and communicating plan, 5)plan that minimizes staff's care giving burden. Thirdly, the rooms necessary for local friendly facility model are composed of bedroom, dining room, kitchen, living room, garden, toilet, laundry room, bathroom, corridor, and office based on the legal installation standards.

• 한국유체기계학회 논문집
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• 제15권4호
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• pp.67-71
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• 2012

This study analyzed performance changes by an inner flow path of impeller groove for side channel type ring blower using CFD. Two models have the same side channel and clearance while one has an inner flow path and the other doesn't. To analyze the performance change of a ring blower, overall performance and local flow field were analyzed. For the overall performance, pressure increase and impeller torque were checked under the design flow condition. Under the design flow condition, pressure increase was greater for the model with the inner flow path. The model with the inner flow path showed improved efficiency because the area subject to torque decreased due to the creation of inner flow path. To analyze local flow field, a section was created from the representative location of each impeller groove toward the direction of radius. Inner channel pressure distribution depending on the rotation direction shows that the model with the inner flow path has pressure equilibrium of working fluid through the inner flow path. Velocity distribution of inside impeller groove shows that flow field was coupled and appeared to form an inner wall where the flow field was stabilized.

• 소음진동
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• 제7권3호
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• pp.427-437
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• 1997

Mean active intensity based active control for the cancellation of radiated noise out of the duct exit is studied. The active intensity control strategy is drerived based on the relation of the exterior sound field out of the duct termination and interior sound field of the duct. One of the characteristics of this control strategy is that the control performance can be maintained regardless of the sensor loction, compared with the conventional local pressure control methods at either interior downstream or exterior field positions. It is also suggested that the digital filtering for the active intensity control can be achieved by time-domain filtered-x LMP (Lest-Mean-Product) adaptive algorithm. Experiments for an open-ended duct are performed to compare the active intensity control performance with conventional pressure control one. Active control experiment of local sound pressure is conducted by widely used filtered-x LMS adaptive Algorithm and active intensity control implementaion uses the derived filter d-x LMP algorithm. It is shown that the exterior sound fileds was much better observable by sensing of the active intensity than by just sound pressure. It is also demonstrated that the global control performance of external field by acoustic intensity is superior to the conventional sound pressure control performance.

• Journal of Biosystems Engineering
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• 제28권2호
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• pp.107-116
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• 2003

One of the major obstructing factors against managing dairy farm in Korea has been a shortage of roughage supply. The shortage of roughage caused excessive use of concentrate feed increase of production cost and deterioration of cattle quality. In order to solve this problem for the dairy farm, use of fallow paddy field in the winter was feasible to produce barley and rye forage during the winter season after harvesting of in. And many desirable effects of raising cattle productivity, saving dollars for importing feeds and providing huge ground for manure spreading are expected by enlarged local roughage production. Through analysing the forage producing process, a mechanized operation model was developed for dairy farms in Korea. Its model consists of seeding models(till, no-till model) and harvesting models(wrap silage, traditional silage, hay model). Currently, the government policies are being executed to urge producing winter cereal wrap silage in the fallow paddy field with various supporting programs. Ant with enlarged local forage production, it is possible to make a new huge market fur forage producing machine.

• 한국정보교육학회:학술대회논문집
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• 한국정보교육학회 2011년도 동계학술대회
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• pp.139-146
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• 2011

본 연구는 스마트 기기를 바탕으로 한 학습 환경에서 창의적 체험활동 운영에 필요한 콘텐츠 개발 방법의 새로운 접근 방법을 제시한다. 창의적 체험활동은 학습 공간을 교실이 아닌 사회로 확장하였다는 점에서 매우 의미가 있다. 학생들은 언제 어디서나 창의적체험자원지도(CRM)을 바탕으로 스마트폰을 이용하여 풍부한 콘텐츠를 접할 수 있게 될 것이다. 이를 위해서는 교육과정과 연계된 다양한 콘텐츠가 필요하다. 이러한 콘텐츠 개발을 위하여 학교와 지역사회의 협력이 중요하며 스마트폰을 기반으로 한 u-러닝 콘텐츠 개발을 위한 지역 중심의 개발 역량을 제고할 필요가 있다.

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2000년도 High Temperature Superconductivity Vol.X
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• pp.107-110
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• 2000

($^{11}$B NMR measurements have been performed on single crystals of LuNi$_2$B$_2$C superconductor to investigate vortex lattice structures and dynamical behavior. The spectrum in the superconducting state is significantly broadened by local field inhomogeneity due to the vortex lattice and the peak point of the spectrum shifts toward low magnetic field due to the imperfect field penetration. The linewidth of the spectrum reflecting local field variation is much smaller than expected for conventional vortex lattices and shows peculiar increase at low temperature. Furthermore, the transverse relaxation rate, 1/T$_2$, probing the slow motion of vortices, exhibits a single peak as temperature decreases. These prominent results highlight significant fluctuation of vortices even for this low T$_c$, and nearly isotropic 3D superconductor.

• 한국정밀공학회지
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• 제15권6호
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• pp.107-115
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• 1998

A path planning using potential field method is very useful for the real-time navigation of mobile robots. However, the method needs high modeling cost to calculate the potential field because of complex preprocessing, and mobile robots may get stuck into local minima. In this paper, An efficient path planning algorithm for multiple mobile robots, based on the potential field method, was proposed. In the algorithm. the concepts of subgoals and obstacle priority were introduced. The subgoals can be used to escape local minima, or to design and change the paths of mobile robots in the work space. In obstacle priority, all the objects (obstacles and mobile robots) in the work space have their own priorities, and the object having lower priority should avoid the objects having higher priority than it has. In this paper, first, potential based path planning method was introduced, next an efficient collision-avoidance algorithm for multiple mobile robots, moving in the obstacle environment, was proposed by using subgoals and obstacle priority. Finally, the developed algorithm was demonstrated graphically to show the usefulness of the algorithm.

• Journal of Electrical Engineering and information Science
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• 제1권2호
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• pp.77-86
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• 1996

In this paper we deal with the problem of recovering 3-D motion and structure from a time-varying 2-D velocity vector field. A great deal has been done on this topic, most of which has concentrated on finding necessary and sufficient conditions for there to be a unique 3-D solution corresponding to a given 2-D motion. While previous work provides useful theoretical insight, in most situations the known algorithms have turned out to be too sensitive to be of much practical use. It appears that any robust algorithm must improve the 3-D solutions over time. As a step toward such algorithm, we present a method for recovering 3-D motion and structure from a given time-varying 2-D velocity vector field. The surface of the object in the scene is assumed to be locally planar. It is also assumed that 3-D velocity vectors are piecewise constant over three consecutive frames (or two snapshots of flow field). Our formulation relates 3-D motion and object geometry with the optical flow vector as well as its spatial and temporal derivatives. The linearization parameters, or equivalently, the first-order flow approximation (in space and time) is sufficient to recover rigid body motion and local surface structure from the local instantaneous flow field. We also demonstrate, through a sensitivity analysis carried out for synthetic and natural motions in space, that 3-D motion can be recovered reliably.

• 한국콘텐츠학회논문지
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• 제15권12호
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• pp.504-516
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• 2015

본 연구는 광양만권 산업체 맞춤 현장실습 활성화 방안을 마련하기 위하여 Q방법을 활용하였으며, 특히 현장실습에 참여하는 다양한 이해관계집단의 구성원-산업체 종사자, 산업체 연수생, 현장실습 담당 지도교수, 현장실습 담당 교직원 등-을 대상으로 이들이 현장실습에 대해 갖는 주관적인 인식과 태도를 유형화하고, 선행연구 검토 결과와 도출된 유형별 특성을 바탕으로 현장실습 활성화를 위한 정책적 시사점을 모색하고자 하는 데 있다. 연구 결과, 산학협력형(제1유형), 수요분석형(제2유형), 현장중심교육형(제3유형) 등 3가지 유형을 도출하였고, 이러한 연구 결과를 통해 대학과 산업체 상호간 긍정적인 산학협력관계 구축과 함께 지역 산업동향 및 인력수요 분석을 통한 인력 양성 종합지원 시스템 구축, 지역 산업체 현장직무 맞춤형 교육훈련을 위한 기반 인프라 구축, 국가직무능력표준(NCS) 기반 현장중심 교육 체계로의 전환 등을 통해 광양만권 산업체 맞춤 현장실습 활성화가 가능할 것이라는 시사점을 찾을 수 있었다.

• 환경영향평가
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• 제11권2호
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• pp.79-91
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• 2002

Four dimensional data assimilation (FDDA) technique was considered for 3 dimensional wind field in coastal area and a set of 3 numerical experiments including control experiments has been tested for the case of the synoptic weather pattern of the weak northerly geostrophic wind with the cloud amount of less than 5/10 in autumn. A three dimensional land and sea breeze model with the sea surface temperature (SST) of 290K was performed without nudging the observed wind field and surface temperature of AWS (Automatic Weather System) for the control experiment. The results of the control experiment showed that the horizontal temperature gradient across the coastline was weakly simulated so that the strength of the sea breeze in the model was much weaker than that of observed one. The experiment with only observed horizontal wind field showed that both the pattern of local change of wind direction and the times of starting and ending of the land-sea breeze were fairly well simulated. However, the horizontal wind speed and vertical motion in the convergence zone were weakly simulated. The experiment with nudgings of both the surface temperature and wind speed showed that both the pattern of local change of wind direction and the times of starting and ending of the land-sea breeze were fairly well simulated even though the ending time of the sea breeze was delayed due to oversimulated temperature gradient along the shoreline.