• 한국철도학회:학술대회논문집
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• 한국철도학회 2001년도 춘계학술대회 논문집
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• pp.80-87
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• 2001

The purposes of this primary study are the selection of rail station and train operation management techniques for express-rail operation service at the convectional railway electrification. For these analyses, we used the KNR statistics and KROIS data of rail stations and train users by rail line. Therefore, we chose the important stations for express-rail operation of Kyongbu conventional rail line (esp. Seoul-Jochiwon section) through the rail transportation demand. and then, suggested primary operational management plan thorough the effects analyses of decreasing total travel time and increasing transportation demand by train speed-up. This study has some bounds and limits for proceeding, as it does, we excluded as followings: the conditionals of fate system, headways and train diagram, economic/financial analysis and technological assessment, and other railway technological infrastructures and a certain railcar specification, etc. . We propose to enlarge this study into a feasibility study of express or skip-stop operation service and compatible vehicle system decision considering with the best possible investment rail line, furthermore. in front of Kyongbu (Seoul-Busan) high-speed rail open in 2004, we have to try to progress the efficiencies of railway operation applying various train operation management plan.

• 한국엔터테인먼트산업학회논문지
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• 제14권7호
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• pp.559-570
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• 2020

본 연구는 의료기관 인증 제도를 받은 요양병원과 양방병원의 내부구성원을 구분하여 인증이 구성원만족도, 직무 스트레스, 병원운영 효과, 의료서비스 향상에 미치는 영향을 파악하고자 하였다. 요양병원이 양방병원보다 인증제도가 구성원만족도, 병원운영효과, 의료서비스 효과에서 높게 나타났으며, 양방병원 구성원이 직무 스트레스에 대해선 높게 나타났다. 요양병원 및 양방병원 모두 인증에 따른 구성원 만족도, 병원 운영효과, 의료서비스 효과는 정(+)적인 결과를 나타났다. 요양병원은 2013년부터 의무적 인증으로 인증제의 효과가 실증적으로 높게 나타났을 것으로 사료된다. 따라서 본 연구는 인증제가 의료서비스 향상에 미치는 영향을 분석함으로써 꾸준한 의료의 질 관리가 병원경영 효율화 및 환자의 만족도 향상에 기여하고자 한다.

• 한국응급구조학회지
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• 제8권1호
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• pp.199-210
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• 2004

Since the 119 fire department was legally permitted to serve in Emergency Medical Service(EMS)Operation of emergency patients in 1983, 119 EMS operation in general has made a big progress in serving the needs for emergency patients. Currently EMS operation is carried out by 119 EMS unit, private ambulance Co.,etc. But due to the public recognition and volunteers, 119 EMS operation carries the major share of the service. This observation is not surprising in that such a trends occured in Japan 20 years ago. This paper compared the 119 EMS operation conducted by the fire department in Korea with that of Japan in order to draw some inferences from the comparison. The results of the study compared to Japan were as follows: 1. Japan was higher 1.5 times in the number of EMS units per population(100,000), 1.1 times in the number of patient transports per unit. 2. Japan was higher 4.54 times in the number of the 119 EMS personnel per population(100,000), 30.6 times in that per square killometers, 30.6 times per 119 EMS unit, in per ambulance 2.48times. 3. Japan was higher 1.83 times in the number of ambulance per population(100,000), 1.26 times in that per square killo meters. 4. Japan was higher 1.7 times in the number of transport patients per population (100,000), but Korea was higher 2.68 times in the transport patients per EMS personal. 5. Compared to Japan, there was no emergency care related to ALS, for example, such as administering dugs orally and intravenously, interpreting elctrocardiograms, performing endotracheal tube or LMA insertion, using monitors and other complex equipments in Korea.

• 보건의료산업학회지
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• 제5권3호
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• pp.13-23
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• 2011

This paper investigated the operating environment for the representative of each agency and the facility workers on the basis of analytical result of recognition changes of the operating environment changes under the operating the long-term care insurance. It was described plans to take positive effect on the operating as follows. The first, on the result of regression analysis, the service administrative range takes the biggest effect on the general recognition of executing the long-term care insurance off and on. The affirmative recognition of the service administrative range had the general recognition on the system be positive effect. But the operator of facility asserts that the care manager's professionalism related quality of service be strengthened. The second, on the result of regression analysis, in the financial accounting administrative it is revealed the more positive recognition it is, the more positive effects it has. From the difference verification of an operation size from operation subject, the small operation size and personal facility recognize the long term care insurance positively. On the other side the facilities where the operation size is big recognize the system negatively. The long-term care facility should rearrange a support program newly and the government needs to promote the donation activity, because it is needed to reduce the financial burden of facilities.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 춘계학술대회
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• pp.22-24
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• 2022

최근 그래프데이터베이스가 널리 사용되기 시작했다. 그래프데이터베이스는 그래프구조를 활용하는 데이터베이스이다. 관계형 데이터베이스의 테이블 대신, 그래프데이터베이스는 정점과 간선 형태로 정보를 저장한다. 데이터 저장구조의 사전 정의 없이 데이터를 저장할 수 있으며 사람이 생각하는 방식과 유사하게 데이터를 저장하고 조회할 수 있다. 그래프 데이터베이스를 활용하면 복잡한 연결구조를 가진 대용량 데이터를 효율적으로 처리할 수 있다. 통신망은 다양한 형태의 통신설비가 복잡하게 상호연결된 그래프구조로 볼 수 있다. 기존의 통신망 관리 시스템(Network Operation Support System)은 통신설비와 설비간 연결관계를 관계형데이터베이스로 관리하고 있어 서비스 종단 간 연결관계를 조회하거나, 고장원인 지점을 추적 ·조회하는등 그래프 탐색쿼리를 수행함에 있어서 어려움이 있었다. 본 연구에서는 통신망 구성 정보를 그래프데이터베이스를 이용해 구축하는 방안에 대해 고찰하고자 한다. 그래프데이터베이스의 도입으로 그래프탐색이 필요한 조회인 경우 효율적인 질의처리가 가능할 것으로 기대한다.

• Journal of Electrical Engineering and Technology
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• 제10권2호
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• pp.452-464
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• 2015

This paper proposes a DC microgrid operational strategy and control method for improved service reliability. The objective is to supply power to as many non-critical loads as possible, while providing an uninterrupted power supply to critical loads. The DC bus signaling method, in which DC voltage is an information carrier, is employed to implement the operational strategy in a decentralized manner. During grid-connected operation, a grid-tied converter balances the power of the microgrid by controlling the DC voltage. All loads are connected to the microgrid, and operate normally. During islanded operation, distributed generators (DGs), a backup generator, or an energy storage system balances the power. However, some non-critical loads may be disconnected from the microgrid to ensure the uninterrupted power supply to critical loads. For enhanced service reliability, disconnected loads can be automatically reconnected if certain conditions are satisfied. Control rules are proposed for all devices, and detailed microgrid operational modes and transition conditions are then discussed. Additionally, methods to determine control parameter settings are proposed. PSCAD/EMTDC simulation results demonstrate the performance and effectiveness of the proposed operational strategy and control method.

• 벤처창업연구
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• 제13권5호
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• pp.87-102
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• 2018

본 연구의 목적은 외식 프랜차이즈 가맹본부의 지원시스템이 가맹점 신뢰와 재무적성과 그리고 가맹사업자의 다점포 운영의도간의 영향관계를 규명하는데 있다. 연구 목적을 달성하기 위해 가맹사업 거래 공정화에 관한 법률 제9조를 참고하여 브랜드 가맹점 숫자가 100개 이하인 국내 중소형 외식 프랜차이즈 가맹사업자 111명을 대상으로 설문 결과를 수집하였으며, 가설 검증에는 구조방정식 모형 분석을 활용하였다. 연구 결과는 다음과 같다. 첫째, 가맹본부의 지원시스템 중 점포개발지원, 교육지원, 물류지원, 슈퍼바이저지원은 가맹점 신뢰에 유의미한 정(+)의 영향을 주는 것으로 나타났으나, 홍보지원은 유의미한 영향을 미치지 않은 것으로 나타났다. 둘째, 가맹본부 지원시스템 중 점포개발지원은 가맹점 재무적 성과에 유의미한 정(+)의 영향을 주는 것으로 나타났으나, 교육지원, 물류지원, 슈퍼바이저지원, 홍보지원은 유의미한 영향을 미치지 않은 것으로 나타났다. 셋째, 가맹점 신뢰는 재무적 성과와 다점포 운영의도에 유의미한 정(+)의 영향을 주는 것으로 나타났다. 넷째, 가맹점의 재무적성과는 다점포 운영의도에 유의미한 정(+)의 영향을 주는 것으로 나타났다. 마지막으로 신뢰와 다점포 운영의도 영향에서 재무적 성과의 매개 효과를 확인해 본 결과 간접적인 영향을 미치는 것으로 확인 되었다. 본 연구는 중소형 외식 프랜차이즈 지원시스템, 가맹점 신뢰, 재무적성과, 다점포 운영의도 간의 영향 관계를 확인 하였으며, 특히 국내 중소형 외식 프랜차이즈 가맹점의 성과와 가맹본부의 시스템의 질적 성장을 통해 동반성장 할 수 있는 영향관계를 확인하였다는데 의의가 있다고 판단된다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1991년도 하계학술대회 논문집
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• pp.738-743
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• 1991

A multiobjective analysis technique was applied for the optimum operation of pumps and reservoirs in service water transmission systems. Three major objectives were identified and assessed on the normally operating service water transmission systems. They are, 1) stability of pump operation; 2) economic point of view in minimizing the energy cost for pumping; 3) reliability in meeting the stochasticaly varying demands. The measures of these objectives were required times of pump on-offs in stability, required total energy cost in economics, and minimum required storage during the operating horizon in reliability. In order to find the best meeting solution to the decision maker, a set of non-dominated solutions which show the tradeoff relationships between the considering objectives were generated. The DM selects the best solution from this explicit tradeoff relationships using his heuristic decision rules or experience. The theory was verified by applying to the Kumi Service Water System. A combined technique of the ${\varepsilon}-constraint$ and the weighting methods was used to generate the nondominated solutions, and the dynamic programming algorithm was applied to find the optimal solution for the discretized multi-objective analysis problems.

• 한국멀티미디어학회논문지
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• 제10권6호
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• pp.786-798
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• 2007

As we go about our daily lives, people often collect surrounding information and adapt to the situation. Computer development trends show that one wants computers to work like human beings, i.e. computers can sense its context and adapt corresponding to context changes. To implement this expectation, a context aware service layer is needed. In this layer, sensors capture its environment and send this information to the service center. Considering received information as its context, the service center seeks the suitable operation according to the context. Tills paper presents a context aware service which is applied in controlling air-conditioner. The air-conditioner includes sensors which are installed at some special positions in a room. Each of these sensors gathers comfort-influenced information like temperature, humidity and sends them to air-conditioner. The air-conditioner adapts its operation to the environment according to the sensed information. To control the air-conditioner effectively, we use a genetic algorithm which is suitable in adaptation issues. The simulation shows that the room condition can be maintained at a comfortable level by using context-aware services in the operation of the air-conditioning system.

• 대한두경부종양학회지
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• 제39권2호
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• pp.27-30
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• 2023

A 65-year-old patient who underwent total thyroidectomy 10 years ago was suspected of having a parathyroid adenoma, and minimally invasive parathyroidectomy was planned. Preoperative ultrasonography(USG) and 99mTc MIBI scan indicated a left lower parathyroid lesion. In the first operation, intraoperative parathyroid hormone monitoring (IOPTH) was not possible due to hospital circumstances. Although no adenomatous lesion was found in the expected surgical field, surgery was completed after removing lesions around the left lower parathyroid gland. However, post-surgery, parathyroid hormone did not decrease at all, so a second operation was performed with IOPTH preparation. In the second operation, intraoperative ultrasonography was performed, and a suspected adenoma lesion was removed from the left upper lesion. He has been under follow-up for 3 years without complications. Surgeon-peformed intraoperative USG and preoperative scintigraphy had advantages in determining the localization of parathyroid lesion even withiout IOPTH.