• Journal of Mechanical Science and Technology
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• 제18권12호
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• pp.2137-2147
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• 2004

The recycling cell formation problem means that disposal products are classified into recycling part families using group technology in their end-of-life phase. Disposal products have the uncertainties of product status by usage influences during product use phase, and recycling cells are formed design, process and usage attributes. In order to deal with the uncertainties, fuzzy set theory and fuzzy logic-based neural network model are applied to recycling cell formation problem for disposal products. Fuzzy C-mean algorithm and a heuristic approach based on fuzzy ART neural network is suggested. Especially, the modified Fuzzy ART neural network is shown that it has a good clustering results and gives an extension for systematically generating alternative solutions in the recycling cell formation problem. Disposal refrigerators are shown as examples.

• 한국항해학회지
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• 제7권1호
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• pp.1-32
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• 1983

The delay due to congestion has recently attracted widespread attention with the analysis of over-all operation at the port. But, the complexity of the situation is evident in view of the large number of factors which impinge on the considerable end. Queueing theory is applicable to a large scale transportation system which is associated with arrivals of vessels in a large port. The attempt of this paper is to make an extensive analysis of the port transport system and its economic implications from the viewpoint that port is one of the physical distribution facilities and a kind of queueing system which includes ships and cargoes as port customer. By analyzing the real data on the Port of Pusan, it is known that this port can be represented as a set of multi-channel with identical setof Poisson arrival and Erlang service time, and also it is confirmed that the following formula is suitable to calculate the mean delay in this port, namely, $W_4={\frac{\rho}{\lambda(1-\rho)} {\frac{e_N(\rho{\cdot}N)}{D_{N-1}(\rho{\cdot}N)}$ where, ${\lambda}$: mean arrival rate $\mu$: mean servicing rate; N: number of servicing channel; ${\rho}$: utillization rate (${\lambda}/N{\mu}$) $e_N$: the Poisson function Coming to grips with the essentials of the cost of delay due to congestion, a simple ship journey cost model is adopted and the operating profit sensitivity to variation in port time is examined, and for purpose of a future development for port princing service the marginal cost is approximately calculated on the basis of queueing theory.

• 인터넷정보학회논문지
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• 제19권1호
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• pp.49-66
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• 2018

본 연구는 VR-AR 체험(Experiential Uses) 행위과정에 나타난 가치단계 요인을 분석(속성, 기능적 혜택, 심리적 혜택, 사용가치), 이용자의 체험 과정에 나타난 욕구와 이용행위 간의 '가치단계도(HVM : Hierarchical Value Map)'에 관한 모형을 구성하는데 목적이 있다. 이를 위해 '수단-목적 사슬 이론(means-end chain theory)'를 적용, 개인적 VR-AR 경험에 나타난 가치사슬을 측정하였다. 본 연구문제를 해결하기 위하여 1차로 AR-VR 콘텐츠 적합도 측정과 2차로 APT래더링을 활용한 구조화 된 설문지를 통하여 135명의 자료를 분석하여 VR-AR 관련 미디어 이용 선택의 '속성'- '기능적 혜택'- '심리적 혜택'- '이용 가치'에 이르는 수단-목적 가치사슬 구조를 파악한 후 가치단계도(HVM)로 VR-AR체험 가치 관계를 실증할 수 있었다. 연구결과, VR 이용자들은 새로운 가상현실 시청각 요소를 통해 현실이탈, 체험의 생생함, 유행선도를 통하여 새로운 성취감, 재미와 즐거움을 통하여 사회생활을 원활히 하고자 하였다. AR이 가지는 생생함과 주변 상호작용을 통하여 자아실현, 타인과 상호작용에 가치를 두고 있으며,'주변인'의 영향이 크게 작용하였고 이들과의 상호작용이 중요한 선택 목적이었다. 이용자들의 VR-AR 선택의 중요 가치는 타인과 상호작용 증진이며 성취감, 행복과 우호적인 가치 속성도 중요하게 고려되었다.

• The Journal of Korean Physical Therapy
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• 제5권1호
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• pp.61-69
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• 1993

It was performed to encourage for Physical Therapist to apply the theory of center of the human body and segments in clinical situations. This study was investigated literarily on center of the human body and segments. Methods which search for the center-2 types, that is, method using reaction broad and segmental method-was suggested. The center location difference of gravity in human body depends on individual character. Generally, the center location is in kent of 2nd sacrum, that is, at $55\%$ of height from foot. The center of each segment is on 'link'. In the first place we must how the weight of segment we can search for the center easily. Mean segment coater location of extremities is at $42.33\%$ from each proximal end, and mean center of head and trunk lies at $45\%$.

• Bulletin of the Korean Chemical Society
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• 제13권3호
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• pp.296-306
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• 1992

$^{13}C$ spin-lattice relaxation times were measured for n-alkanes of moderate chain length, ranging from n-octane to n-dodecane, under the condition of proton broad-band decoupling within the temperature range of 248-318 K in order to gain some insight into basic features of segmental motions occurring in long chain ploymeric molecules. The NOE data showed that except for methyl carbon-13 dipole-dipole interactions between $^{13}C$ and directly bonded $^1H$ provide the major relaxation pathway, and we have analyzed the observed $T_1data$ on the basis of the internal rotational diffusion theory by Wallach and the conformational jump theory by London and Avitabile. The results show that the internal rotational diffusion constants about C-C bonds in the alkane backbone are all within the range of $10^9\;-10^10\;sec^{-1}$ in magnitude while the mean lifetimes for rotational isomers are all of the order of $10^{-11}\;-10^{-10}$ sec. Analysis by the L-A theory predicts that activation energies for conformational interconversion between gauche and trans form gradually increase as we move from the chain end toward the central C-C bond and they are within the range of 2-4 kcal/mol for all the compounds investigated.

• 한국데이타베이스학회:학술대회논문집
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• 한국데이타베이스학회 1999년도 춘계공동학술대회: 지식경영과 지식공학
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• pp.253-260
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• 1999

The recycling cell formation problem means that disposal products me classified into recycling part families using group technology in their end of life phase. Disposal products have the uncertainties of product status by usage influences during product use phase and recycling cells are formed design, process and usage attributes. In order to treat the uncertainties, fuzzy set theory and fuzzy logic-based neural network model are applied to recycling cell formation problem far disposal products. In this paper, a heuristic approach fuzzy ART neural network is suggested. The modified fuzzy ART neural network is shown that it has a great efficiency and give an extension for systematically generating alternative solutions in the recycling cell formation problem. We present the results of this approach applied to disposal refrigerators and the comparison of performances between other algorithms. This paper introduced a procedure which integrates economic and environmental factors into the disassembly of disposal products for recycling in recycling cells. A qualitative method of disassembly analysis is developed and its ai is to improve the efficiency of the disassembly and to generated an optimal disassembly which maximize profits and minimize environmental impact. Three criteria established to reduce the search space and facilitate recycling opportunities.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 1999년도 춘계공동학술대회-지식경영과 지식공학
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• pp.253-260
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• 1999

The recycling cell formation problem means that disposal products are classified into recycling part families using group technology in their end of life phase. Disposal products have the uncertainties of product status by usage influences during product use phase and recycling cells are formed design, process and usage attributes. In order to treat the uncertainties, fuzzy set theory and fuzzy logic-based neural network model are applied to recycling cell formation problem for disposal products. In this paper, a heuristic approach for fuzzy ART neural network is suggested. The modified Fuzzy ART neural network is shown that it has a great efficiency and give an extension for systematically generating alternative solutions in the recycling cell formation problem. We present the results of this approach applied to disposal refrigerators and the comparison of performances between other algorithms. This paper introduced a procedure which integrates economic and environmental factors into the disassembly of disposal products for recycling in recycling cells. A qualitative method of disassembly analysis is developed and its aim is to improve the efficiency of the disassembly and to generated an optimal disassembly which maximize profits and minimize environmental impact. Three criteria established to reduce the search space and facilitate recycling opportunities.

• 한국조리학회지
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• 제12권4호
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• pp.97-115
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• 2006

The variable of WRL is composed of dimensions and their sub-items based on FRL. This study categorized these dimensions into 43 items fittingly to the situation in Korea through examining the validity of the contents. In addition, to overcome limitations in situation set for formulating the variable, which was not suggested in previous researches, this study diagramed the situation in three steps based on the cycle of MOT. The index of WRL which was adapted to reality of Korea society was finalized into 8 dimensions and 33 questionnaire items after processed in refining method as a procedure of re-proving the method.

• Journal of Hospice and Palliative Care
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• 제11권2호
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• pp.78-81
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• 2008

목적: 인생의 말기는 삶을 영위하는 가운데 가장 중요한 부분 중의 한가지이다. 그런데 의사, 간호사를 포함한 의료진과 자원봉사자가 말기 환자에 대한 이해와 교육이 충분하게 이루어지지 않고 있다. 이 연구의 목적은 호스피스 완화의료의 꽃으로 알려진 자원봉사자들에 대한 교육내용을 비교하고자 한다. 방법: 다양한 기관에서 자원봉사자들에 대한 교육이 실시하고 있으나 강의 내용과 강의 시수를 알 수 있는 전국 9개 기관의 교육내용을 분석 비교하였다. 결과: 평균 강의 시간은 21.56 ($14{\sim}30$)시간이었으며, 모든 기관에서 공통적으로 포함된 교육 내용은 호스피스 완화의료의 이해, 삶과 죽음에 대한 이해, 호스피스 대상자의 심리 이해 등이며, 온라인을 통한 교육이 1개 기관, 나머지 8개 기관에서는 집체교육을 통한 강의를 위주로 시행되고 있다. 결론: 자원봉사자들의 지역사회 참여의 활성화를 도모하여 말기 환자와 가족에게 제공되는 서비스를 질적으로 강화시키기 위하여 자원봉사자를 위한 교육과정의 목표와 교육내용, 교육시간, 교육기관으로서의 인정평가 등에 대한 전반적인 표준화가 필요할 것으로 생각된다.

• 대한토목학회논문집
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• 제7권1호
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• pp.55-64
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• 1987

단위도합성(單位圖合成)을 위하여 기존(旣存) 지형학적(地形學的) 순간단위도(瞬間單位圖)의 개념(槪念)을 도입(導入)하였다. 이를 위한 하천차수(河川次數)의 기법(技法)은 Strahler의 차수법칙(次數法則)을 이용(利用)하였으며, 하천수(河川水)의 동적상태(動的狀態)를 나타내기 위하여 평균유출속도(平均流出速度)가 사용(使用)되었다. 지형학적(地形學的) 특성인자(特性因子)들로부터 결정(決定)된 순간단위도(瞬間單位圖)를 IHP 대표시험유역(代表試驗流域)인 경안천(慶安川), 무심천(無心川), 위천유역(渭川流域)에 적용(適用)하여 첨두유량(尖頭流量) 및 도달시간(到達時間)을 계산(計算)하였고, 실측자료(實測資料)와의 비교검토(比較檢討)를 통하여 GUH의 적용성(適用性)을 입증(立證)하였으며, 증감(增減)된 평균류출속도(平均流出速度)와 가정(假定)된 손실율(損失率)을 적용(適用)시키므로써 수문곡선(水文曲線)의 첨두유량(尖頭流量)의 변화(變化)는 일정손실율(一定損失率) 보다 평균유출속도(平均流出速度)에 따라 크게 좌우(左右)됨을 알 수 있었다.