• 동국한의학연구소논문집
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• 제5권
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• pp.33-52
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• 1996

The purpose of this study was to investigate efficient treatment in obesity. In order to help clinical application in obesity treatment, this study was performed to investigate the cause and treatment in obesity. The main finding of this study were as follows. 1. In the cause of oriental medicine in obesity, that were moisture(濕), phlegm(痰), gore(瘀), the productive heat(積熱), overeating, supemutrition, underaction, heredity and habitude, psychologic factor(stress) etc. 2. In the western medicine, the cause of obesity were genetic cause, endocrine disorder, hypothalamic extraodinary and secondary effect of drug. But simple obesity is the greater part. Also there were psychologicai and environmental causes. 3. Ear acupuncture of wide application were Naebunbi, Sinmun, Taejang, $ij{\check{o}}m$, $Pyej{\check{o}}m$, $Bij{\check{o}}m$ etc. 4. Body acupuncture of application were $Naej{\check{o}}ng$, $Sangg{\check{o}}h{\check{o}}$, Pungnyung, Kokchi, $Sam{\check{o}}mgyo$, $Umn{\check{o}}ngch{\check{o}}n$ etc. 5. In oriental medical treatment of obesity, Bangpungtongs ngsan(防風通聖散), Daesihotang(大柴胡湯), Seungkitang(承氣湯), Bangkihwangkitang(防己黃?湯), Richulsaryeungtang(二朮四笭湯), Taeksatang(澤瀉湯), Opieum(五皮飮), Gongyundan(控涎丹) etc were wide applicated. 6. The western medical treatment in obesity encourage the dietary cure, exercise cure and behavior adjustment than medical therapy or operation. In treatment of obesity, the dietary cure and herb-drug therapy, ear acupuncture and body acupuncture are effective. But weight maintenance after treating is more important. After all the continuous dietary cure, behavior adjusting cure and exercise cure are necessary.

• 한국CDE학회논문집
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• 제21권2호
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• pp.111-121
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• 2016

The plant equipment usually has a long life cycle. During its O&M (Operation & Maintenance) phase, since the occurrence of an accident of offshore plant equipment causes catastrophic damage, it is necessary to make more efforts for managing critical offshore equipment. Nowadays due to the emerging ICTs (Information Communication Technologies) and sensor technologies, it is possible to gather the health status data of important offshore equipment and their environment data, which leads to much concern on CBM (Condition-Based Maintenance). In this study, we will propose an approach to estimate the remaining lifetime of an offshore plant equipment (pump tower) based on gathered ocean environment data.

• 한국산학기술학회논문지
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• 제14권11호
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• pp.5964-5970
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• 2013

최근 우리나라 도로 관련 국가 예산 편성을 살펴보면 신규 도로 건설에 대한 투자 보다는 유지관리에 대한 투자가 늘어가고 있는 것을 알 수 있다. 이로 인해 도로시설물에 대한 유지관리의 중요성이 점차 강조되고 있고 보다 효율적인 유지관리를 위해 해외의 도로 관련 정책이나 시스템을 도입해 가고 있다. 해외의 경우 도로 유지관리의 많은 부분은 민간업체와의 장기 계약을 통해 수행되고 있고 우리나라의 경우도 1년 단위 단기 유지관리계약에서 장기 계약으로 바꾸려고 하는 실정이다. 장기 유지관리 계약 확대를 위해 가장 중요한 요구사항은 정확한 유지관리비용 예측에 기반 한 계약금액의 산정과 계약당사자들의 위험 분배를 위한 제도적 장치이다. 이에 본 연구에서는 고속도로 유지관리 장기 계약의 정착을 위해 합리적인 계약 금액의 산정 방법을 제안하고 실물옵션을 활용하여 계약당사자들의 투자 위험을 적절히 분배할 수 있는 계약 체계를 제안하고자 한다. 제안된 계약체계를 20년 20km의 고속도로 유지관리 계약에 적용 시켜본 결과 각각 약 457억 원의 계약금액 그리고 600억 원과 423억 원의 실링과 플로어 조건을 산정할 수 있었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 A
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• pp.169-171
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• 2002

The western route of KEPCO's 765kV transmission line has been tentatively operating as 345kV voltage before commercial operation. After finishing the test operation of 765kV substation in 2002. KEPCO decided to operate the 765kV line for commercial operation. During the applying of 765kV voltage to the transmission line, double circuit transmission line will be operated with two voltage grades of 765kV and 345kV. Because the earthing switch is installed on both end of transmission line, we had estimated the electrostatic induction voltage and electromagnetic induction current before the line energizing in order to confirm the ratings of earthing switch. The induced voltage and current is very important for the maintenance of parallel circuit. This paper describes the simulation study of electrical phenomena such as electrostatic induction voltage from the parallel line and electromagnetic induction current from the parallel circuit. The transmission line model was developed by EMTP (Electro-Magnetic Transient Program).

• 한국정보과학회논문지:정보통신
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• 제27권1호
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• pp.39-47
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• 2000

이 논문은 이동통신 시스템의 제어국에 순간적으로 가해지는 다량의 입력 메시지의 신뢰성있는 제어를 위하여 이동통신 시스템의 제어국에서 처리하는 입력 메시지를 두 가지 형태로 구분하여 메시지가 갖는 특성을 분석하였다. 메시지는 호 접속 관련 메시지와 운용 및 유지보수 관련 메시지로 구분하였으며, M/M/1/K 큐잉모델을 이용하여 메시지별로 입력 메시지의 손실 확률, 큐의 평균 길이, 프로세스 관리기(서버)의 점유율, 큐의 평균 대기 시간을 분석하였다. 그리고 과밀한 메시지 입력에 따른 부하 제어 시 두 메시지에 대한 성능 비교를 컴퓨터 시뮬레이션을 통하여 실시하였다.

• 한국콘텐츠학회논문지
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• 제12권1호
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• pp.68-79
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• 2012

한국은 경제 부흥을 꾀하기 위해 1980년대 말부터 도로시설물 건설을 확대해 왔다. 그 결과, 2010년 이후부터는 시설물의 보수, 보강 수요가 급증할 것으로 예측된다. 따라서 제한된 예산을 가지고 사용자의 만족도를 높이면서 시설물의 관리 기술을 혁신하기 위해 자산관리정보시스템을 연구하고 있다. 본 연구는 터널시설물의 유지관리를 대상으로 서비스 수준을 평가하는 항목을 제시하는 내용으로서, 이를 위해 사용자와 관리자를 구분하여 평가항목의 중요도에 대해서 설문조사를 실시하였다. 설문조사 결과를 토대로 Satty가 제시한 AHP(Analytical Hierarchy Process) 기법을 사용하여 평가항목들의 상대적 중요도를 파악하였다. 사용자관점에서의 중요도는 안정성-이동성-접근성-편리성-관리 효율성-쾌적성-지역 활성화-환경성-정보성 순서로 파악되었다. 또한 관리자관점에서의 중요도는 안정성-이동성-접근성-환경성-지역 활성화-편리성-관리 효율성-정보성-쾌적성 순서로 파악되었다. 이는 도로가 갖는 가장 기본적인 기능인 이동성보다 터널시설물의 안전성에 대한 관심이 더 높다는 것을 의미한다. 따라서 터널시설물의 유지관리 투자계획을 수립할 때 안전성을 확보할 수 있도록 보다 많은 관심과 노력을 기울려야 할 것으로 사료된다.

• 한국농공학회지
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• 제15권4호
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• pp.3170-3180
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• 1973

This study of the subject will review past and present irrigation development in Korea. Particular attention will be given to water pricing structure and a case study on the purpose of rational operation and management of irrigation water and organizations, and the optimum irrigation water and organizations, and the optimum irrigation water fee inorder to reduce farmers burden and to rationalize the farmland associations management so as to achieve development of the rural environment. In 1971, the reservoir of the Farmland Improvement A sociation (FIA) produced only 775 millison $m^3$ of irrigation water or 77% of planned capacity of 1,015 million $m^3$. It was caused by inefficient maintenance of irrigation facilities; for instance, about 21% of reservoirs, pumping stations and weirs in Korea have been silted by soil erosion which hinder to water production according to an ADC survey. The first Irritation Association was established in 1906, whcih was renamed the Farmland Assoeiation by the Rural Development Enouragement Law in 1970. By the end of 1971, 411,000 ha of rice paddies were under the control of 267 associations nationwide. The average water price assessed by Associations nationwide rose from 790 won per 0.1 ha. in 1966 to 1,886 won in 1971. The annual growth rate was 20%. The highest water price in 1971 was 4,773 won her 0.1 ha. and the lowest was 437 won. This range was caused by differences in debt burden, geographic conditions and management efficiency among the Associations. In 1971, the number of Associations which exceeded the average water price of 1,886 won per 0.1 ha. was 144, or 55.1% of all Association. In determination of water price, there are two principles; one is determined by production cost such as installation cost of irrigation facilities, maintenance cost, management cost and depreciation ect. For instance, the Yong San River Development project was required 33.7 billion won for total construction and maintenance cost is 3.1 billion won for repayment, maintenance and management cost per year. The project produces 590 million $m^3$ of irrigation water annually. Accordingly, the water price per $m^3$ is 5.25 won. The other principle is determined by water value in the crop products and in compared with production of irrigated paddy and non-irrigated paddy. By using this method, water value in compared with paddy rice vs. upland rice(Average of 1967-1971) was 14.15 won per $m^3$ and irrigated paddy vs. non-irrigated paddy was 2.98 won per $m^3$. In contrast the irrigation fee in average association of 1967-1971 was 1.54 won per $m^3$. Accordingly, the current national average irrigation fee(water price) is resonable compared with its water value. In this study, it is found that the ceiling of water price in terms of water value is 2.98 won per $m^3$ or 2,530 won per 0.1 ha. However, in 1971 55% of the associations were above the average of nationwide irrigation fees. which shows the need for rationalization of the Association's management. In connection with rationalization of the Association's management, this study recommends the following matters. (1) Irrigation fee must be assessed according to the amount of water consumption taking intoaccount the farmer's ability. (2) Irrigation fee should be graded according to behefits and crop patterns. (3) Training personnel in the operation and procedures of water management to save O&M costs. (4) Insolvent farmland association should be integrated into larger, sound associations in the same GUN in order to reduce farmers' water cost. (5) The maintenance and repair of existing irrigation facilities is as important as expansion of facilities. (6) Establishment of a new Union of Farmland Association is required to promoted proper maintenance and to protect the huge investment in irrigation facilities by means of technical supervision and guidance.

• 풍력에너지저널
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• 제13권2호
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• pp.42-52
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• 2022

In this paper, we propose a time-series generation methodology using a generative adversarial network (GAN) for long-term prediction of wind and sea conditions, which are information necessary for operations and maintenance (O&M) planning and optimal plans for offshore wind farms. It is a "Conditional TimeGAN" that is able to control time-series data with monthly conditions while maintaining a time dependency between time-series. For the generated time-series data, the similarity of the statistical distribution by direction was confirmed through wave and wind rose diagram visualization. It was also found that the statistical distribution and feature correlation between the real data and the generated time-series data was similar through PCA, t-SNE, and heat map visualization algorithms. The proposed time-series generation methodology can be applied to monthly or annual marine weather prediction including probabilistic correlations between various features (wind speed, wind direction, wave height, wave direction, wave period and their time-series characteristics). It is expected that it will be able to provide an optimal plan for the maintenance and optimization of offshore wind farms based on more accurate long-term predictions of sea and wind conditions by using the proposed model.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 B
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• pp.543-545
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• 1995

The purpose of this paper is to determine the proper reliability criteria used in generation expansion planning of electric utilities. In this paper, we tried to combine long-term generation expansion planning and short-term weekly maintenance scheduling program package. We set two scenarios in which the O&M technology of power plants will be improved or not in the future. We performed LOLP sensitivity analysis for each scenario to determine the optimum reliability criteria in the power system operation aspects.

• 동아시아경상학회지
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• 제12권3호
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• pp.11-23
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• 2024

Purpose: The plant industry is a key order-taking industry that leads national industrial development through convergence and integration with various industries in all value chains from planning and marketing to financing, design and engineering, purchasing, construction, and operation and maintenance (O&M). Research design, data and methodology: The Korea government has been actively promoting overseas plant market development support projects to support large and public enterprises and medium and small enterprises. Results: The Korea government are working with the industry and the government so that the Korean plant industry can establish itself as a key driving force that provides the foundation for low-carbon and energy transition that our times demand and makes our world a better place to live. Conclusion: A high value-added industry that brings enormous profits and international fame to exporting countries. Korea is highly dependent on trade, should recognize the plant industry as a key national export sector.