• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2009년도 춘계학술대회 논문집
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• pp.815-816
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• 2009

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2011년도 춘계학술대회 논문집
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• pp.1305-1306
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• 2011

• 한국식품조리과학회지
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• 제18권6호
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• pp.625-631
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• 2002

The objectives of this study were to determine the degree of job satisfaction and need satisfaction of school foodservice employees, and the relationship between Job in General(JIG) and need satisfaction. The six demographic items, the Job Descriptive Index(JDI) and JIG scale, and Need Satisfaction Questionnaire(NSQ) were used to evaluate job satisfaction and need satisfaction of school foodservice employees. The results of this study showed that the employees were satisfied with co-workers(2.52), then supervision(2.48), work(1.86), promotion(0.72) and pay(0.51) in decreasing order. Older employees(Age$\geq$40) tended to be more satisfied in JIG(p＝0.0620) than younger employees(20$\leq$Age$\leq$39). Employees were satisfied in social needs, then autonomy needs, self-actualization needs, esteem needs, security heeds in decreasing order. There were no significant differences between demographic factors and five need categories. When the employees were classified by their scores on JIG, Group I having the lowest score tended to be less satisfied(p＝0.0627) in security needs than Group II and Group III. The information of study could be useful for foodservice managers in job design to increase the productivity.

• 대한소아치과학회지
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• 제24권3호
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• pp.543-548
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• 1997

The first permanent molar takes important place in the occlusion. Malposition of the lower first molar is frequently due to mesial migration, which is occurred by early exfoliation of the second deciduous molar or proximal caries of deciduous teeth. Above things happen without any consideration of space maintainer, prompt measures for space regaining have to be started. Especially in the case with early loss of the second deciduous molar, it has been said that there is no suitable appliance for maintaining the space before the eruption of the permanent first molar. In distalizing the upper first molar, headgears have been routinely used, which its result was definitely depended on cooperation of the patients. Nowadays, appliances such as pendulum appliances, K-loop, magnets, which can be used without cooperation of the patients, are introduced. Jones Jig, one of the molar distalizing appliances, was used on the patients who visited department of pediatric dentistry in Seoul National University Dental Hospital complaining of no eruption space for the lower second bicuspid. Either removable splint or lingal arch was used as the anchorage. Jones Jig was favorably used in the lower molar, where vestibule is shallow, and this is a case report on the satisfactory result thereof.

• 한국산학기술학회논문지
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• 제4권4호
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• pp.372-379
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• 2003

Desktop-PC의 메모리 모듈 제품을 대상으로 실장 검사를 하는데 있어 발생하는 문제점인 메인보드 메모리 연결부의 파손을 보완하기 위해 확장 카드를 개발하였다. 확장 카드 개발 전 메인보드 연결부의 파손은 하루 15％의 수준으로 잉여설비를 15％이상 확보해야 하며 수리를 전담으로 하는 인력을 필요로 하는 문제점을 가지고 있다. 확장카드의 개발로 소켓의 파손에 따른 업무 지연과 잉여설비의 capacity향상 및 작업성 개선을 통해 연간 7,800만원의 비용을 절감 할 수 있었다.

• 한국CDE학회논문집
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• 제14권6호
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• pp.415-423
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• 2009

Because of the fast changing car design and increasing facilities, manufacturing process of cars is getting more complex now a days. Particularly, car manufacturing system that consist of automated devices, applies various simulation techniques to validate device motion and detect collision. To cope with this problem, traditional manufacturing system deployed test-run with the real devices. However, increased computing power in a contemporary manufacturing system changes it into realistic 3D simulation environment. Similarly, managed device data that was generated using 2D traditionally, can be converted to 3D realistic simulation. The existing problem with 3D simulation is disjoint data interaction between different work stations. Consequently, JIGs, fixing the car part accurately, are changed according to fixing position on the part or a part shape properties. In practice, the 3D JIG data has to be managed according to kinematic information, but not of its features. However, generating kinematic information to the 3D model repeatedly according to frequent change in part is not explained in current literatures. To fill this knowledge gap, this paper suggests an improving method of rendering 3D JIG kinematics information to simulation model. Thereafter, it shows the result of implementation.

• 한국해양공학회지
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• 제29권1호
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• pp.34-44
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• 2015

A hydraulic tensile test machine (HSTM) is one of the devices used to obtain the flow stress of a material during high-speed elongation. This paper first describes some features of a newly built HSTM. The improvement histories of the upper and lower jigs, which are the most vital parts of the HSTM, are also presented. We have frequently witnessed test failures with 1st generation jigs and specimens due to slip between the jig and specimen. 2nd generation jigs provide more stable test results, but the use of a longer upper jig induces excessive vibration and consequently makes it difficult to attach an environment chamber. 3rd generation jigs have some advances in terms of the symmetric fastening between the upper jig and specimen, as well as an exemption from direct contact between the lower jig and specimen. The performance of an environment chamber is verified by high and low temperature tests. A high-speed displacement measurement system is introduced based on a high-speed camera and motion-tracking software with aid of a surface grid device for the specimen.

• 대한치과보철학회지
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• 제26권1호
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• pp.133-151
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• 1988

The objectives of this study were to compare the position of centric relation guided by means of leaf gauges, bilateral manipulation, chin-point guidance with Lucia jig and self-guided method and the reproducibility, respectively. A Veri-check (Denar Co., Anaheim, California) was employed for examining, and the displacement of position and reproducibility were verified. The following results were obtained. 1. On the sagittal plane, the centric relation guided by means of leaf gauges showed greater posterior displacement than that by means of bilateral manipulation and less than that by means of chin-point guidance with Lucia jig, and self-guided centric relation showed least posterior displacement. The centric relation guided by means of bilateral manipulation showed greater superior displacement than that by means of chin-point guidance with Lucia jig and less than that by means of leaf gauges and self-guided centric relation showed least superior displacement. 2. On the horizontal plane, the centric relation guided by means of chin-point guidance with Lucia jig showed greater posterior displacement than that of bilateral manipulation and less than that leaf gauges, however the self-guided centric relation showed slightly anterior displacement. 3. The anteroposterior displacement measured on sagittal plane and horizontal plane were highly correlated. (p<0.05). 4. The reproducibility of centric relation guided by means of leaf gauges, bilateral manipulation and chin-point guidance with Lucia jig were similar and more reproducible than self-guided centric relation.

• 복식
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• 제57권9호
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• pp.1-15
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• 2007

The purpose of this study is to classify the types of and to examine the characteristics of the golden decoration technique used for expressing patterns on the costumes from Dang dynasty to Cheong dynasty era. In order to classify the types of the golden decoration technique and to examine its characteristics, literature review, focusing on documents and records of China, and investigation on the relics from Dang to Cheong Dynasty era were conducted. The types of decoration technique using gold include china JigGeum (brocade technique), InGeum (attaching gold powder and flake technique), GeumSaJaSu (embroidery technique), GeumSaTapestry, mixed technique. Interestingly, it was newly found in this study that embroidery with golden thread was used in the GeumSaTapestry technique and that there were some cases of the mixture of 2-3 gold decoration technique. The GeumSajaSu technique was used the most frequently from Dang dynasty to Yo dynasty era. However, its use had decreased enormously while the use of JigGeum had increased a lot since Geum dynasty era. The mixture of 2-5 techniques was used frequently in JigGeum, GeumSaJaSu, and GeumSaTapestry, but not used in InGeum. Particularly, the mixture technique was the most frequently used in the GeumSaTapestry, which expresses by composition of paintings. All four methods were used the mostly frequently in costumes, while GeumSaJaSu and GeumSaTapestry were generally used for home accessories. InGeum and GeumSaJaSu were used a lot for gaze and leno fabrics such as Sa or Ra, while JigGeum was mostly used for satin weaved fabrics like Dan.

• 폴리머
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• 제38권5호
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• pp.645-649
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• 2014

사출성형품의 잔류응력 형성의 원인은 사출성형공정 중 재료가 받는 높은 온도변화와 전단응력이다. 케미컬 크랙킹 테스트는 잔류응력을 측정하는 방법 중의 하나이며 크랙은 잔류응력의 크기에 따라 형성된다. 본 연구에서는 시편이 받고있는 응력과 케미컬 크랙킹과의 관계를 연구하였다. 변형지그를 설계하고 이를 이용하여 시편에 변형을 주어 응력을 가하였다. 시편은 폴리카보네이트를 이용하여 핫 프레스로 제작하였고 시편의 제작 중에 형성된 잔류응력을 제거하기 위해 어닐링을 하였다. 시편을 변형지그에 고정시키고 시편에 크랙을 유도하기 위해 이를 솔벤트에 담궜다. 솔벤트는 tetrahydrofuran과 methyl alcohol을 이용하여 제조하였다. 시편에서 변형에 따라 응력이 증가할수록 크랙의 빈도수와 밀도가 증가하였다. 본 연구의 결과는 케미컬 크랙킹 방법으로 폴리카보네이트 사출성형품의 잔류응력을 정량적으로 측정하는데 활용될 수 있다.