• 한국경영과학회지
• /
• 제25권3호
• /
• pp.49-64
• /
• 2000

A vendor supplies a product to a sole/major buyer on a lot-for-lot basis under deterministic inventory control conditions. The basic premise is that the setup cost reduction technologies are available to both the buyer and the vendor, and that the vendor's inventory and setup reduction investment costs differ from the buyer's. Therefore, an individually designed ordering and setup cost reduction policy will likely cause mismatches between the vendor's and the buyer's optimal cycle times. For this situation, we show that a joint optimal setup cost reduction and ordering policy, together with an appropriate side payment(quantity discount or premium price) schedule, can be designed in a spirit in a spirit of coordination to eliminate mismatches in individual optimal cycle times.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
• /
• pp.826-831
• /
• 1991

Automated Storage and Retrieval System (AS/RS), which is an element of Computer Integrated Manufacturing (CIM), is a widely used material handling equipment with conveyors and Automatic Guided Vehicles (AGVs). Until now the evaluation of operational policies of AS/RS and control algorithms is done theoretically or by computer simulations. In this study, a real-time control and monitoring software of an AS/RS is also developed by making actually moving AS/RS miniature. A PC-based real-time monitoring program can control the AS/RS directly through the communication port. The monitoring program has additional functions such as storage/retrieval management, inventory management, and statistics management. The program can not only collect the necessary statistics but monitor the current action of the AS/RS concurrently.

• 산업공학
• /
• 제8권1호
• /
• pp.45-52
• /
• 1995

Automated Storage and Retrieval System (AS/RS), which is an element of Computer Integrated Manufacturing (CIM), is a widely used material handling equipment with conveyors and Automatic Guided Vehicles (AGVs). Until now the evaluation of operational policies of AS/RS and control algorithms is done theoretically or by computer simulations. In this study, a real-time control and communication software for an AS/RS is developed for actually moving AS/RS miniature. A PC-based real-time operational program can control the AS/RS directly through the communication port. The operational system has additional functions such as storage/retrieval management, inventory management, statistics management, and protocol simulation. The communication protocol simulator of S/R machine can be used for the controller of an S/R machine.

• Industrial Engineering and Management Systems
• /
• 제10권2호
• /
• pp.115-122
• /
• 2011

This research considers a system containing a manufacturing firm who generates waste material during manufacturing process, and a disposal firm who collects and disposes the waste material. Identification of the optimal number of pick ups and the amount of waste to be disposed at certain period of time in terms of cost minimization is studied. Two types of waste accumulation rates, constant and linearly increasing, are discussed and mathematical models are developed. It can be shown that the results for these two different types of waste accumulation differ in a wide range because of the difference in the way of how waste is accumulated, which disturbs the storage cost. An integrated model is also developed and discussed in which both the manufacturing firm and the disposal firm benefit from the coordination between the two parties. It is shown that the optimal policy adopted by the integrated approach can provide a strong and consistent cost-minimizing effect for both the manufacturing firm and the disposal firm over the existing approach. Finally, all the models are verified by a numerical example and the results are compared.

• Physical Therapy Rehabilitation Science
• /
• 제11권2호
• /
• pp.165-171
• /
• 2022

Objective: Nonspecific low back pain (NSLBP) is experienced worldwide by many age groups. Yoga is recommended as an exercise to reduce back pain and stress because it is a breathing exercise, posture, and meditation as key elements. The aim of this study is to compare the effects of yoga and stabilization exercise on pain intensity, function, and depression. Design: An open-label, parallel arm, randomized controlled trial Methods: Twenty-four participants were allocated to the experimental and the control group in a ratio of 1:1. Yoga (experimental group) and stabilization exercise (control group) were received twice a week for 6 weeks Participants were assessed at baseline and post-intervention for pain intensity (numeric pain rating scale), function (Aberdeen low back pain scale, flexibility,and strength), and depression (Beck depression inventory). Results: When the experimental group (Yoga) and control group (stabilization exercise) were performed twice a week for 6 weeks, numeric pain rating scale, Aberdeen low back pain scale, and flexibility in post-intervention showed significant improvement in both groups (P<0.05), However, in all variables, the experimental group showed a positive benefit compared to the control group (P<0.05). Conclusions: The results of this study show that yoga has more positive benefits compared to stabilization exercise in pain intensity, function, and depression in individuals with NSLBP.

• 정신신체의학
• /
• 제13권2호
• /
• pp.95-101
• /
• 2005

연구목적 : 부모의 정신병리가 아동의 적응기능과 정신병리에 영향을 미친다고 알려져 있다. 또한 우울한 어머니는 자녀들의 행동에 대해 더 부정적으로 판단하며, 더욱 비판적이며 강압적인 양육방식을 취하게 되어 모자관계에 부정적인 영향을 미치게 된다. 저자들은 주의력결핍 과잉행동장애 진단을 받은 환아의 보호자를 대상으로 우울, 불안, 감정표현불능, 스트레스반응의 정도를 알아보고자 하였다. 방법: DSM-IV 진단기준에 의해 주의력결핍 과잉행동장애로 진단된 환아 38명의 보호자를 대상으로 하였고, 나이와 성별을 맞춘 16명의 자원자를 건강대조군으로 하였다. 환아 보호자군과 건강대조군에 대하여 Beck의 Beck Deperssion Inventory(BDI), Spielberger의 State-Trait Anxiety Inventory(STAI), Taylor의 Tronto Alexithymia Scale (TAS), 고경봉의 스트레스반응척도(SRI)를 사용하여 두 군 간의 차이를 비교하였다. 결과: 1) 환아 보호자군과 대조군의 BDI 평균점수는 각각, $16.4{\pm}7.1,\;10.9{\pm}5.5$점으로 통계적으로 유의한 차이를 보이고 있었으며 (p=0.011), BDI 점수 21점을 절단점으로 하여 21점 이상을 우울증이 있다고 했을 때, 환아 보호자군에서는 7명(18.4%)이 해당되었으나, 대조군에서는 해당되는 경우가 없어 두 군간의 유의한 차이가 관찰되었다(p=0.021). 또한 우울증이 있는 보호자의 자녀에서 주의력결핍 과잉행동장애가 발생할 가능성은 그렇지 않은 경우에 비해 1.516배 높았으며 이러한 관련성은 통계적으로 유의하였다(95% 신뢰구간=$1.235{\sim}1.862$). 2) 환아 보호자군과 대조군의 스트레스반응척도의 평균점수는 각각, $44.2{\pm}20.2$점, $26.5{\pm}16.8$점이었고, 이러한 차이는 통계적으로 유의하였다(p=0.006). 3) 상태불안척도 및 특성불안척도, 감정표현불능척도에서 두 군간의 유의한 차이는 관찰되지 않았다. 결론: 이상에서 주의력결핍 과잉행동장애 환아의 보호자군은 그렇지 않은 군보다 많은 우울증상과 높은 정도의 스트레스반응을 보이는 것이 확인되었다. 주의력결핍 과잉행동장애에 대한 치료적 접근에 있어서 환아보호자의 정신병리에도 관심을 갖고 이에 대한 통합적인 접근이 필요할 것으로 사료된다.

• 한국지리정보학회지
• /
• 제19권1호
• /
• pp.167-179
• /
• 2016

최근 범지구적으로 증가하는 이상기후에 의해 SOC 시설물 안전이 지속적으로 위협받고 있다. 재난대응을 위해서는 피난 대피 경로 제시 등과 같은 신속한 의사결정이 필요하며 이는 재난 재해 정보 및 SOC 시설물 정보가 융 복합된 시공간적 정보가 활용되어야 한다. 이러한 정보는 정부 및 유관기관에서 분산적으로 수집되고 있어, 통합적 관리가 이루어지지 않고 있는 실정이다. 신속한 재난대응을 위해서는 분산 수집 관리되고 있는 재난 재해 정보의 통합관리와 SOC 시설물에 대한 안전도와 피해도 등의 정보 생성이 필요하다. 또한 재난 재해 정보 특성상 시공간적 융합이 필요하기 때문에, 관련 정보를 통합한 재해대응 의사결정 지원을 위한 인벤토리 구축이 필요하다. 본 연구에서는 신속한 재난대응의사결정 지원을 위한 시설물 중요도 위험도 피해액 인벤토리 구축 방안을 제시한다. 본 연구를 통해 분산 관리 되고 있는 재난 재해 및 SOC 시설물 관련 데이터를 수집하여 표준화 하고, 시설물의 중요도 위험도 피해액 산정에 필요한 통합 정보를 제공 할 수 있다. 향후 제안된 시스템을 통해 선제적 재난 대응을 위한 의사결정 도구로 활용할 수 있을 것으로 판단된다.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2007년도 춘계학술대회 논문집
• /
• pp.1244-1249
• /
• 2007

Pursuing sustainable development throughout society and industry and the field of environmental policy, each international organization or nation has performed international standardization projects on environmental management activities for their system as well as environmental assessment for a product such as life cycle assessment (LCA) and life cycle inventory database (LCI DB), and the environmental aspects have been increasingly demanded as crucial evaluation specifications. Moreover, the conventional environmental policy, which represents the direct-control, has been more dependent on the market forces and product itself after the Climate Change Convention., and the Integrated Product Policy (IPP, EU) is applied vigorously to strengthen global competitiveness of a product and to achieve the effect of environmental improvement for it. According to change of the international railway market, the value of Eco-Design has been increasingly important in developed countries including EU. Thus, each country is establishing its own guidelines, software and database for each product, and developing new policies through Eco-Design with practical results in marketing. To react this and develop Korean railway as an environment-friendly industry with priority to other transportation system as well as maintain high place in technology, the direction of RACE software development of main function is introduced, which is exclusively used for EMU to assess both environmental and economic aspects with LCA and eco-efficiency (EE).

• 정보관리학회지
• /
• 제18권4호
• /
• pp.57-79
• /
• 2001

본 연구는 기록물을 관리할 수 있는 국제 표준에 맞는 메타데이터 관리 시스템을 설계 및 구현하여 한국 교육사회연구소의 콜렉션 관리에 활용하고 아울러 기록물정보관리의 모형 구축을 위한 기초 자료를 제시하는것을 목적으로 한다. 메타데이터를 설계하기 위해서 기록물의 목록 규칙과 관련된 네 가지 종류의 자료 측 국제표준기록물기수레[ISAD(G)], 미국 기록물/필사본 기계가독목록 (USMARC AMC). EAD 및 Ebind를 참조하였다. 시스템에 대한 이용자 만족도, 시스템의 개선점 및 향후 콜렉션을 포함한 다양한 기록물 관리 시스템을 구현하기 위한 기초 자료를 얻기 위하여 설문지를 이용하여 시스템을 평가해 보았다. 평가 분석 결과는 향후 시스템을 갱신할 때 활용할 수 있도록 정리하였고, 제안된 시스템을 도서관이나 기록관 현장에 바로 적용시키기 위해서 단계별로 진행할 수 있는 작업 계획을 제시하였다.

• Child Health Nursing Research
• /
• 제21권2호
• /
• pp.123-130
• /
• 2015

Purpose: The purpose of this study was to understand the intellectual and psychological features of children with Moyamoya disease who were patients in the Department of Pediatric Neurosurgery of Severance Hospital. Methods: From December 2010 through December 2012, 63 patients with diagnoses of Moyamoya disease and 59 children in a normal group were enrolled. This study was conducted using the Korean-Wechsler Intelligence Scale for Children, Rey-Kim Memory Test for children, Korean Child Behavior Checklist and Pediatric Quality of Life Inventory$^{TM}$4.0. Results: The results showed that the intellectual and psychological profiles of children with Moyamoya disease were lower than the average of the normal control group. The tested patients showed significantly lower scores for Performance Intelligence Quotient cognition level. Also, in terms of quality of life, children with Moyamoya disease had lower levels of physical and school functionality. The results were in line with those of previous studies involving psychological tests of children with chronic diseases. Conclusion: Considering the intellectual and psychological characteristics of children with Moyamoya disease, integrated psychological intervention plans including elements such as supportive therapy for patients and programs for parental education are required.