• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 1998년도 The 12th Asia Quality Management Symposium* Total Quality Management for Restoring Competitiveness
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• pp.43-50
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• 1998

The cause of software crisis is that software quality and productivity can not meet the requirement of software market. In order to resolve the software crisis, there are many approaches to be proposed. Software reuse is one of the high potential approaches to improve software quality and productivity. Some high-tech countries (like USA, Japan) have proposed and studied the topics of software reuse in 1970 and got several results. In software development procedure, the products of detailed design and implement phases are simple, definite and suitable for reuse. In this paper, the necessary documents of reusable software component will be proposed, and how to select and evaluate the software components with high reuse potential and high quality will be discussed and recommended.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.1632-1636
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• 2007

Generally, fine high carbon steel wire is produced using a multi-pass drawing process with speeds over 1000 m/min. The productivity of the wire drawing mainly depends on achieving the highest drawing speed without breaking the wire. In the multi-pass drawing, as the final drawing speed increases, the temperature rises several hundred Celsius. High temperature of wire increases the brittleness and leads to breaks. The objective of this study is to design pass schedule and wire drawing machine for superhigh speed. In the drawing experiment, it was possible to increase the productivity through the increase in final speed from 1100 m/min to 2000 m/min.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.1243-1248
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• 2007

In recent, rapid manufacturing (RM) technology is widely used to develop an injection mould with a high performance. The objective of this paper is to develop the injection mould with a high productivity using a hybrid RM technology combining Laser-aided Direct Metal Tooling process with a machining process. The geometry decomposition has been utilized to improve the speed of the manufacturing for the mould. Mould with conformal cooling channels has been designed to improve cooling characteristics. Several experiments have been carried out to evaluate characteristics of the mould manufactured from the hybrid RM technology. In addition, injection molding tests have been performed to examine the performance of the manufactured mould. The results of the injection molding tests have been shown that a cooling time and the injection time of the designed mould are reduced to one-fifth and one-second that of the mould with convention cooling channels.

• 한국안전학회지
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• 제17권4호
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• pp.1-4
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• 2002

A automatic production system was developed for high productivity and safety. The semi-progressive die was unfavorable for more productivity, safety, material extravagance and incongruent high-speed production. Developed progressive die is suitable for the high production and guarantee triple production by acceptance of three array type for automobile adjust plate. We adopt Pro-$Engineer{\circledr}$ for three dimensional computer aided design suitable for the disassembly and assembly evaluation. The conclusion of this study is as follow. First, press die parts solid modeling system is built by using Pro-$Engineer{\circledr}$ through this research and verified allowable tolerance and possibility of assembly and disassembly of parts. Therefore we can reduce die manufacturing time and cost. Second, We produce 1000 units pet hot coil 1ton by traditional method, but we can acomplish material saving effect about 12% as 120 units in case of new progressive die. Fourth, we acomplished manufacturing cost curtailment effect more than 20% in comparison with traditional method.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2005년도 춘계 학술기술논문발표대회 논문집
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• pp.141-147
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• 2005

Usually, processing whole project or a part of frame work delays due to acceleration, changing orders, management, characters of project. overtime, worker crowding, early occupation in the field of construction. Through a whole project, these factors cause decreasing construction labor-productivity which is the most dependent in business of construction. These kind of decreasing of construction labor-productivity cause many negative effects, just as extension of time, increasing cost in project of construction. Regardless of characters of construction or decreasing labor-productivity, extension of time is a incident which needs acceleration, also it cause a high possibility of claim and dispute. The productivity has just a broad meaning in business of construction. That's why it's difficult to apply in the field of construction. Especially, factors increasing or decreasing labor-productivity is defined by analysis of working as qualitative and outlined evaluation. However, study of the each factor decreasing construction labor-productivity analysis has not researched, because of difficulty of systematic measurement and management. The existed studies about management of productivity are just focused on estimation of productivity, not on evaluation of productivity. It was true that I couldn't examine clearly about the analysis of how much important per each the factor which have influence on labor-productivity because of the characteristic as qualitative that the labor productivity have On this study, i tried to get the factors decreasing of labor- productivity with gathering opinions of panels of expert's studies about the factors decreasing of labor-productivity on project of construction through Delphi method and i evaluated the result factors as quantitatively and subjectively about importance of factors decreasing construction labor-productivity Analysis, using AHP Method by Saaty. Also, using Delphi and AHP method, 1 suggest substantiated method qualitative factors are measured by quantitative criteria.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2002년도 Proceedings of the International Welding/Joining Conference-Korea
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• pp.43-48
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• 2002

$\textbullet$ The modern duplex steel 2205 can be a cost effective solution compared to standard austenitic stainless steels. $\textbullet$ 2205 offers a welded construction with very high corrosion resistance as well as high strength. $\textbullet$ The steel can be welded with high productivity welding procedures. $\textbullet$ Due to the possibility of reduced weld preparation and welding associated with reduced wall thickness, the total welding costs co be decreased further.

• KSBB Journal
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• 제10권4호
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• pp.406-420
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• 1995

Polyhydroxyalkanoates[PHAs] are the polyester of hydroxyalkanoates(HAs) synthesized by numerous bacteria as an intracellular carbon and energy storage compound and accumulated as granules in the cytoplasm of the cells under unbalanced growth condition in the presence of excess carbon source. Even though PHAs have been recognized as good candidates for biodegradable plastics, their high price compared with conventional plastics has limited their use in a wide mange of applications. To reduce the high production cost of PHAs, many group of scientists have devoted much efforts to improve productivity by employing various microorganisms and by developing efficient culture techniques. The strategies of producing PHAs to a high concentration with high productivity and their potential applications are reviewed.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part2
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• pp.1259-1260
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• 2006

Intensive technological research on the Dry-bag CIP equipment was carried out to improve the dimensional accuracy and the productivity. The rubber mold design technology using FEM simulation during pressing was introduced, in order to achieve higher dimensional preciseness, and criteria for the selection of the In-line type or Off-line type, were established based on the powder flowability index proposed by Carr. Based on these research results, high productivity Off-line Dry-bag CIP equipment, which can realize good dimensional accuracy with high productivity, was developed even for non-granulated powders with poor packing density.

• Journal of Construction Engineering and Project Management
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• 제5권2호
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• pp.16-23
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• 2015

In this paper, a survey related to excavation construction activities among national and international construction companies was conducted to evaluate site productivity in construction industry. To analyze the respective productivity levels of each construction company, a benchmarking measures analysis that featured calculations of the performance ratio (PR) and performance management index (PMI) was performed. As a result of these analyses, it has been found that the work performed by local companies was marked by lower productivity and that of international companies was characterized by good productivity. Further analysis of construction workforce resources P% revealed that a construction company's productivity is largely dependent on production capacity and consumption resources, which means that the retention of skilled workers and utilization of high-quality resources yields the highest level of productivity. These results suggest that for a local construction company to be competitive in the construction work market, it must retrain skilled craftspeople, foremen, engineers, and project managers, and strengthen its building capability by leveraging new equipment and technologies.

• 한국해양학회지
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• 제26권3호
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• pp.223-241
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• 1991

경기만 바깥수역에 조석 전선 형성이 식물플랑크톤 생태에 미치는 영향을 알기 위 하여 국립 수산 진흥원의 정기 정선 관측 자료 분석과 3차에 걸친 현장조사가 서해 중 동부 연안 수역에서 이루어 졌다. 수온와 용존산소의 자료를 분석한 결과 조석 전선이 경기만 바깥수역인 태안 반도 서편에 춘·하계에 걸쳐 형성되는 것이 발견되었다. 조 석 전선의 형성은 식물플랑크톤의 분포와 일차 생산력에 영향을 주는 것으로 나아났 다. 전선 형성 수역의 식물플랑크톤 현존량, 색소량, 일차 생산력이 연안 혼합 수역이 나 바깥 성층 형성 수역의 현존량 색소량, 일차 생산력보다 높게 나타났다. 전선 형성 수역이 이러한 높은 일차 생산력은 좋은 광조건과 풍부한 영양염 공급에 기인된 것으 로 보인다. 전선수역을 경계로 연안 수역은 비교적 높은 색소량과 낮은 일차 생산력을 보이고 성층 형성 수역은 낮은 색소량과 비교적 높은 일차 생산력을 보였다. 성층 형 성 수역의 비교적 높은 일차 생산력은 표층의 미세플랑크톤에 의한 높은 동화율과 수 온 약층 아래에 많이 나타나는 부유성 저서 규조류가 좋은 관조건으로 높은 생산력을 보였기 때문이다. 대체로 본 조사수역은 춘하계의 전선형성에 따라 연안 혼합 수괴, 전선 형성 수괴, 성층 형성수괴로 구분되며 이에 따라 Cholorophyll 분포, 일차 생산 력 분포, 식물플랑크톤의 정량 분포도 이에 영향을 받고 있음을 보여주었다.