• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2003년도 추계학술대회 논문집
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• pp.221-222
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• 2003

잔류성유기오염물질(Persistent Organic Pollutants, 이하 POPs)은 환경에 노출되면 장기간 잔류하면서 인체 및 생태계에 악영향을 끼치며 또한 장거리 이동하는 특징으로 인하여 전지구적인 규제ㆍ관리의 필요성이 제기되고 있다. 이러한 필요에 부응하여 UNEP를 중심으로 국제적인 관리를 위한 논의가 이루어져 2001년 5월 스톡홀름협약(Stockholm convention for Persistent Organic Pollutants)이 당사국회의에서 채택되었고, 우리나라는 외교적 서명을 함으로써 협약가입의사를 분명히 하였다. (중략)

• 산업공학
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• 제14권4호
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• pp.334-340
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• 2001

The theory of constraints (TOC) has become a valuable system in modern operations management. Using the ideas and methods of the TOC, companies can achieve a large reduction of work-in-process and finished-goods inventories, significant improvement in scheduling performance, and substantial earnings increase. The purpose of this paper is to calculate the optimal size of the time buffer which is used to accommodate disruptions in production processes and provide maximum productivity of capacity constrained resources. After the problem formulation in terms of single server queueing model, we observed the system behavior by sensitivity analyses.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.413-422
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• 1996

" Row -Zone Tillage" systems apply tillage procedures only to narrow strips of land where the next crop rows will be planted. The tilled zones are no more than 25% of the field area. Row-zone tillage procedures of crop production are conservative, where in the soil remains partially covered with protective residues while crops are planted , fertilized , grown , and harvested in the row-zones. Specially adapted implements are being developed for these operations. There is potential for minimizing farm machinery inventories. Limited crop response data are available from Canada and the USA.d the USA.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2001년도 추계학술대회 논문집
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• pp.377-378
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• 2001

포항지역은 인구규모 50만 정도의 중소도시이지만 도심은 항만을 끼고 있고 포항제철 및 연관산업체가 입지하여 선박, 전동기관차 그리고 인근의 공항 등 다양한 형태의 대기오염물질 배출원이 공존하고 있는 지역이다. 지금까지 대기오염배출량 산정에는 주로 자동차 및 산업체 및 주거지역지역과 같은 오염원을 다루고 있으며 기관차, 항공기 및 선박과 같은 오염원에 의한 대기오염물질 배출량 산정은 드물다. 이러한 복합적인 오염원이 존재하는 곳에서의 대기질 관리에 있어 가장 선행되어야 할 사항 중의 하나는 주요한 대기오염 배출원의 파악과 가장 현실성 있는 오염원의 배출목록을 작성하는 것이다. (중략)

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2005년도 춘계학술발표회
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• pp.241-242
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• 2005

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2002년도 춘계공동학술대회
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• pp.476-480
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• 2002

The theory of constraints (TOC) has become a valuable system in modern operations management. Using the ideas and methods of the TOC, companies can achieve a large reduction of work-in-process and finished-goods inventories, significant improvement in scheduling performance, and substantial earnings increase. The purpose of this paper is to calculate the optimal size of the time buffer which is used to accommodate disruptions in production processes and provide maximum productivity of capacity constrained resources. After the problem formulation in terms of single server queueing model, we observed the system behavior by sensitivity analyses.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2010년도 춘계학술대회 논문집
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• pp.211-212
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• 2010

• 산업융합연구
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• 제1권2호
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• pp.69-79
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• 2003

In order to solve scheduling, many techniques including optimization and heuristics methods have been proposed. However, these conventional approaches are usually inadequate to obtain a satisfactory solution because of a NP-Complete which requires extensive computation effort. The aim of this paper is to develop an expert system for job shop scheduling using an AI technique. Through this system, the user can choose one of several performances. If one performance is chosen, then the system solves a scheduling in order to satisfy that performance. Then, this system decides urgent job. This system can utilize production resources efficiently and minimize work-in-process inventories and tardy jobs.

• 한국환경과학회지
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• 제23권9호
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• pp.1643-1654
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• 2014

The university is one of the main energy consumption facilities and thereby releases a large amount of greenhouse gas (GHG). Accordingly, efforts for reducing energy consumption and GHG have been established in many local as well as international universities. However, it has been limited to energy consumption and GHG, and has not included air pollution (AP). Therefore, we estimated GHG and AP integrated emissions from the energy consumed by Seoul National University of Science and Technology during the years between 2010 and 2012. In addition, the effect of alternative energy use scenario was analysed. We estimated GHG using IPCC guideline and Guidelines for Local Government Greenhouse Inventories, and AP using APEMEP/EEA Emission Inventory Guidebook 2013 and Air Pollutants Calculation Manual. The estimated annual average GHG emission was $11,420tonCO_{2eq}$, of which 27% was direct emissions from fuel combustion sectors, including stationary and mobile source, and the remaining 73% was indirect emissions from purchased electricity and purchased water supply. The estimated annual average AP emission was 7,757 kgAP, of which the total amount was from direct emissions only. The annual GHG emissions from city gas and purchased electricity usage per unit area ($m^2$) of the university buildings were estimated as $15.4kgCO_{2eq}/m^2$ and $42.4tonCO_{2eq}/m^2$ and those per person enrolled in the university were $210kgCO_{2eq}$/capita and $577kgCO_{2eq}$/capita. Alternative energy use scenarios revealed that the use of all alternative energy sources including solar energy, electric car and rain water reuse applicable to the university could reduce as much as 9.4% of the annual GHG and 34% of AP integrated emissions, saving approximately 400 million won per year, corresponding to 14% of the university energy budget.

• 한국콘텐츠학회논문지
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• 제17권6호
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• pp.98-105
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• 2017

의료기관들의 부채관리 문제는 도산 등 경영위험의 직접적인 요인으로 파악되고 있는데, 현금흐름은 소요자금이나 도산예측에 유용한 정보를 제공해 준다. 본 연구는 24개 종합병원과 23개 병원을 대상으로, 영업활동 현금흐름이 부채상환능력에 미치는 영향을 살펴보기 위하여 회귀분석을 실시하였으며, 부채 위험성에 대비하기 위한 현금흐름 관리방안 모색을 위하여 다변량 판별분석을 실시하였다. 연구결과, 종합병원들은 당기순이익 매입채무의 증대 의료미수금과 재고자산의 감소 방법으로 부채상환능력 수준이 이루어지고 있었는데, 부채상환능력이 없는 경우에는 당기순이익 향상, 현금유출 없는 비용 증대, 의료미수금 감소, 매입채무 증대 등을 검토할 필요성이 제기되었다. 병원들은 당기순이익 현금유출 없는 비용과 매입채무의 증대 현금유입 없는 수익과 의료미수금 및 재고자산의 감소 방법으로 부채상환 능력 수준이 이루어지고 있었는데, 부채상환능력이 없는 경우에는 매입채무의 증대를 검토할 필요성이 제기되었다.