신발 제조업에의 린 생산방식 도입

윤재홍,송한식,권치명,정문상 東亞大學校 經營問題硏究所 1994 經營論叢 Vol.15 No.-

This paper is concerned with a lean production system to improve the productivity of shoes manufacturing industries. For this purpose, this research first reviews the environmental characteristics of shoes manufacturing industries and invetigates the current problems of shoes production systems. Shoes manufacturing process roughly consists of three process lines shoes uppers line, shoes soles line, and assembling line of shoes uppers and soles. Two major problems in shoes production system are a large amount of work-in-process(WIP) inventories, and the low rate of matching shoes uppers and soles in an assemblying line. Most of shoes manufacturing companies have more than a 3-days WIP inventories in every process line to avoid the blocking the production. Particularly the assemblying line has 5-7days buffers of shoes uppers and soles to maximize the productivity of manufacturing final shoes, however, the matching rate of shoes uppers and soles in the assemblying line is about 50%. These problems are from a low efficiency in inventory control mainly due to (1) too many order specification of sizes, colours, types and different due dates, and (2) a large amount of WIP inventories. To reslove above mentioned problems, we sugggest a lean production system of pull-method for reduction of WIP inventories and improvement of matching rate of shoes uppers and soles in assemblying line. Compared to a push production system(current production system), a pull production system may have a number of adventages in controlling inventories and balanced match of the sole parts and uppers parts when it applied to shoes manufacturing process. As an alternative to control the pull production method, we design a Kaban for production and inventory control. Also we design the Kaban circulations model for the production lines and inventory stores, and a shoes manufacturing information system to incorporate the Kaban system. We expect that the effective adoption of the pull production system to shoes manufacturing system will show better results in improving the matching rate, and reducing the WIP inventories and production lead time. These effects may also give more flexible production planning and raw matiarial procurement planning. We finally consider this research would be helpful in designing the lean shoes production system

지역발전을 위한 대학교 연구소 역할활성화에 관한 연구 : 아산·천안지역과 순천향대학교 사회과학연구소를 중심으로 focused on Asan and Chonan Area and the Research Institute of Social Science at Soonchunhyang University

윤주명,유형선,원재환,안동근 순천향대학교 사회과학연구소 2002 순천향 사회과학연구 Vol.8 No.1

The objective of this study is to survey the demand of profit and non-profit sectors to research institute of social sciences at soonchunhyang university(RISS of SCH) in Asan and Chonan city, to find the policy alternatives to develop RISS of SCH. Form the result of analysis, the degree of recognition to RISS of SCH of both profit and non-profit sectors is very low, but their willingness to cooperate with RISS of SCH is relatively high. Especially they want the partnership with RISS of SCH in reeducation of their staffs, exchange of information, and co-works in research and seminar so on. This study suggests as the developing ways of RISS of SCH, changing organizational structure, making eeducation programmes for staffs of profit and non-profit sector, creating new media to disseminate information, and publishing partnership research journal with neighborhood university so on.

CAD/CAM 시스템 導入效果에 관한 考察

尹在坤,金明淑 효성여자대학교 산업경영연구소 1988 경영경제 Vol.5 No.-

CAD/CAM will play an ever increasing role in design and production circles. It is likely to be one of the major growth areas of the 80's and 90's. Because, manufacturing management today is challenged by competitive pressures from abroad, cost pressures from within and shorter product life cycles from changing markets. CAD/CAM system is to design a product, assembly or part on the computer and run the appropriate software programs to obtain all of the desired manufacturing outputs. A CAD/CAM function is shown as follow: <본문참조> For the effective application of CAD/CAM system in Korea, the application effects of the system were measured in S Company. The results of measurement showed that 37.5% of machine running was advanced and 629% of cost reduction was obtained. In addition, it R&D time. In conclusion CAD/CAM system is considered to be greatly effective on manufacturing areas.

地震火災事例로 본 國內 都市地域의 安全對策 硏究

윤명오,김광일,이영재 (社)韓國火災 ·消防學會 1996 한국화재소방학회논문지 Vol.10 No.2

This is a paper to figure out characteristics and damages of earthquake fire occurred in Kobe, Japan by analyzing the various damage cases. The policy implications were considered in terms of safety in metropolitan areas in Korea.

쇄골 중간부 골절후 불유합 및 지연 유합의 원인

윤정로,심재익,김택선,이성종,김영배,김학준,안국환,장재영,홍명표 대한골절학회 2002 대한골절학회지 Vol.15 No.4

쇄골 중간 1/3 부위의 골절은 치료 결과가 양호하여 보존적 치료가 원칙적으로 받아 들어지고 잇으며 불유합에 대한 빈도도 낮은 것으로 되어 있다. 그러나 최근 전위 및 단축의 정도가 심할 경우 높은 불유합의 결과와 불량한 임상 결과를 보고하고 있어 이런 예에 대해선 수술적 치료를 권장하고 있다. 저자들은 단축 및 전위의 정도와 불유합의 연관성을 알아보고자 하였다. 연구 대상 및 방법 : 1993년 2월부터 2002년 1월까지 본원에 내원 했던 성인 중간부 쇄골 골절 환자 194명 중 완전 전위를 보인 78례를 조사하여 이중 63례를 대상으로 분석하여 후 향적 연구를 시행하였다. 4개월 추시 후에도 방사성 사진상 유합 소견이 관찰되지 않으면 불유합의 유의성을 알아보고자 하였다. 결 과 : 63례 중 불유합 및 지연 유합을 소견을 보인 환자는 15(23%)례였다. 골유합을 보인 48례의 단축은 평균 8.6㎜(2㎜-17㎜)였고, 전위는 평균 9.7㎜(2-22㎜)였다 .불유합 및 지연 유합을 보였던 15례에서 단축은 평균 14.5㎜(3㎜-37㎜), 전위는 평균 17.3㎜(4-25㎜)였다. 18㎜이상 단축이 있었던 경우 불유합의 발생과는 통계학적으로 유의성을 나타내었고(Fisher's exact test, p<0.01), Chi-square test상 16㎜ 이상의 전위를 보였던 경우 불유합 발생과 통계학적으로 의미가 있었다(p<0.01). 결 론 : 쇄골 골절 특히 중간 1/3의 골절은 비교적 보존적 치료에 결과가 좋은 것으로 되어 있으나, 전위 및 단축이 심한 경우 불유합에 대한 가능성이 높이 때문에 보다 경과 관찰시 유합의 진행이 없으면 적극적인 치료를 고려해야한다. Purpose : Because the prognosis of the mid 1.3 clavicle fracture is good, the conservative treatment with a figure of 8 bandage is the gold standard and the nonunions are rare. However, recently surgical treatment is recommended when the shortening and displacement is severe because of the high nonunion rate and the poor clinical result. This study was undertaken to evaluate that the shortening and displacement at fracture site are associated with the development of nonunion. Materials and Methods : We analysed the 194 fractures of mid 1/3 clavicle in adults which had been treated conservatively from February 1993 to January 2002 and did the retrospective study. Of these, 78 cases were originally in the middle third of the clavicle and had been completely displaced. We reviewed 63 of these cases. The shortening and displacement at the fracture site was measured on the initial roentgenogram. And the analysis of the patients' chart was done for another predisposing nonunion factors. Nonunion and delayed union are considered to be present when there has been little or no progression of clinical or radiographic healing at a minimum of 4 months after injury. Results : 15 of the 63 cases had developed nonunion.. The average 8.6㎜(2㎜-17㎜) shortening and average 9.7㎜(2-22㎜) in the union patients. The average 14.5㎜(3㎜-37㎜) shortening and average 17.3㎜(4-25㎜) in the nonunion patients. We found that initial shortening ≥18㎜(Fisher's exact test, p<0.01) and initial displacement ≥ 16㎜(Chi-square test. p<0.01)at the fracture site were significantly associated with the development of nonunion. Conclusion : The conservative treatment with figure-80-bandage is the gold standard in the clavicle middle one third fracture. However, the nonunion is commonly occurs in the cases of more of severely shortened and displaced fractures. If there are no signs of callus formation and the patient complains of pain after several week, osteosynthesis should be considered.

열형광선량계에 의한 선량평가 알고리즘 개발

송명재,김희근,하정우,이태영,윤석철 대한방사선 방어학회 1992 방사선방어학회지 Vol.17 No.2

본 연구의 목적은 ANSI N13. 11-1983의 시험기준에서 제시한 개인선량계의 선량평가 시험범주를 모두 만족시킬 수 있는 선량평가 알고리즘을 개발하는데 있다. 알고리즘 개발 대상 개인선량계로는 Teledyne Isotopes사의 PB-3 열형광선량계로 하였다. 개발된 알고리즘에 대한 미국 Atlan-Tech사와의 2차례의 검증결과, 본 알고리즘은 ANSI N-13. 11-1983의 선량평가 범주를 모두 만족시키는 것으로 나타났다. The purpose of this study is to develop an algorithm of TLD dose evaluation to meet all requirements stated in ANSI N13. 11-1983. It made the PB-3 TLD of Teledyne Isotopes an object of the development. Personal dosimetry performance testings of the development algorithm have been performed twice through the Atlan-Tech, INC. in accordance with the criteria of testing described in ANSI N13. 11-1983. As a result, it is assured that the developed algorithm has complied with all requirements stated in ANSI N13-1983.

海砂 混合率 變化에 따른 水中不分離性 콘크리트의 特性에 관한 硏究

김명식,윤재범,김광민,이상명 釜慶大學校 1999 釜慶大學校 論文集 Vol.4 No.1

The objective of this study is to investigate the characteristics change of antiwashout underwater concrete with variation of blen ratio of sea sand to total fine aggregates through experimental studies. The flowability(slump flow test), antiwashout properties(pH and suspension test), filling property(box test), air and chloride contents property, and the unit weight and the compressive strength of both cast-in-fresh water and cast-in-sea water have been examined experimentally. According to the experimental results, when sea sand are mixed in antiwashout underwater concrete mixture by about 40% per total fine aggregates, it is found that the flowability fit and the compressive strength is higher than others.

알코올 섭취 후 운동이 시간 경과에 따른 혈중 알코올 농도와 간 기능 효소에 미치는 영향

오명진,김종오,윤재석,정일규 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

This study was done in order to investigate the effects of performing the light exercise right after alcohol drinking on the changes of blood alcohol and ALT, AST concentration, All seven healthy collegiate students volunteered to two sections of experiment, Each subject drank one bottle of Soju(360ml, 75.6g ethanol) For forty minutes at the same speed of drinking with the same kind and volume of carbohydrate snacks. Each section of the study was conducted by a two-cross-over design with four days wash-out period, All volunteers performed brisk walking exercise corresponding to about 50-60%HRmax of exercise intensity For 30minutes immediately after alcohol drinking. Blood sampling was conducted by drawing about 10ml venous blood from antecubital vein at pre -alcohol drinking, and post- 1, 2, 4 hour alcohol drinking. Blood alcohol concentration reduced significantly at all time course in exercise group compared to Control group. However, the concentration of serum aspartate aminotransferase and alanine aminotransferase, the indicator of liver cell damage, showed no significant difference between two groups. In conclusion, performing light exercise such as brisk walking after alcohol drinking may somewhat help to reduce the concentration of blood alcohol Faster by influencing the alcohol metabolism.

플라즈마 질화에 의한 STS 304강의 표면물성에 관한 연구

孫明淑,尹在弘,李建煥,邊應善 國立 昌原大學校 産業技術硏究所 1996 産技硏論文集 Vol.10 No.-

The most essential point on the ion nitriding of stainless steel is to eliminate passive film. Therefore, it has been studied that passive film was eliminated by changing pre sputtering parameters. Then pre sputtering parameters were pressure, holding time and gas mixing ratio. The degree of elimination of passive film was characterized by using AES and its crystallographic structure by means of XRD. Mechanical property and microstructure were determined by Vickers hardness test and SEM. The results obtained from the experiment are summarized as follows ; 1. Sputtering pressure and holding time had no relation with the behavior of nitride layer and the most effective parameter was observed as gas mixing ratio. 2. The retained O₂concentration in vacuum atmosphere was decreased by deoxidization of H??ion with gas addition. H??ion prevented the oxidization on the surface of stainless steel and reduced oxygen potential of sputtered oxide from the surface. 3. For pre sputtering, H₂gas was more dominant in the nitriding rate than Ar and N₂gas. 4. Ar/H₂gas mixture which gas mixing ratio was 1/2(vol%) was the most effective in all pre sputtering conditions. It was estimated that this resulted from the combination of the mechanical reaction by bombardment massive Ar??ion and the chemical reaction by deoxidization of H??ion. 5. For ion nitriding of the oxidized stainless steel thickness which diffuse easily nitrogen into stainless steel. In this study, the mechanical reaction by bombardment massive Ar??ion was more effective parameter than chemical reaction by deoxidization of H??ion to eliminate oxide layer which grow up to a critical thickness.

알코올의 섭취가 흰쥐의 혈액과 간의 지질대사에 미치는 영향

이명숙,김영연,김효숙,김매하,전진순,서진숙,송선미,양영재,윤원손,이미라,이효영,정승현 誠信女子大學校 生活文化硏究所 2004 生活文化硏究 Vol.18 No.-

To investigate the effects of ethanol on the lipid metabolism in blood and liver, twenty one male Sprague Dawley rats had orally taken the 25% alcohol and 50% alcohol by 5g per Kg of weight during 3 weeks after the adjusting period. For the energy balance, 85% sucrose and 45% sucrose was added in control group and 25% alcohol group each. The weight was reduced by alcohol treatment according to the levels, otherwise the weight of liver and heart was little increased in alcohol groups rather than in control without significance. Moreover, RBC, WBC, hemoglobin and hematocrit were increased by alcohol treatment according to the levels without significance. Otherwise, adjusted bilirubin levels by 100g of weight was significantly increased by alcohol treatment dose dependently. Alcohol induced RBC degradation and increased circulated bilirubin because of liver damage. For blood lipid profiles, blood cholesterol was increased in 50% of alcohol group compared to that of 25% and control groups, otherwise, blood triglycerides (TG) was increased by 30% in 25% alcohol groups rather than in control but not significantly different. The hepatic lipid composition, cholesterol levels in alcohol treatment groups was lower than those in control. The hepatic TG was not influenced by alcohol treatment. The two reasons of decreasing hepatic lipids were suggested by 85% sucrose of control for energy balance more synthesized cholesterol and TG than those in 25 or 50% alcohol groups, and by cholesterol and TG could not be synthesized because of liver damage from alcohol.