• 예술인문사회 융합 멀티미디어 논문지
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• 제9권1호
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• pp.845-858
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• 2019

오늘날 비즈니스 환경에서 기업이 직면한 가장 심각한 문제는 신제품개발성과에 실패하는 것이다. 통계적으로 매년 출시된 신제품의 거의 과반수이상이 시장에서 성공하지 못한 것으로 나타났다. 기술진보가 혁신적으로 일어남에도 불구하고 소비자의 기대수준은 더욱 높아지고 국내외 경쟁이 치열해짐에 따라 신제품 수명주기는 갈수록 짧아지고 있다. 시장에서 장기간 성공할 수 있는 상품을 개발하지 않고는 기업은 살아남기가 어렵다. 결국 기업의 성공과 실패에서 가장 중요한 문제는 신제품의 성공적인 도입과 개발일 수밖에 없다. 기존 연구에서 신제품개발성과를 달성하기 위해 다양한 요인을 제시하고 있지만 본 연구에서는 동적역량을 주요 요인으로 보고 구성요인을 파악하고자 한다. 기업이 지속적으로 생존하고 발전하기 위해서 자원을 획득, 흡수, 통합 및 재구성할 수 있는 역량이 필요하며 변화하는 환경에 적응하기 위해서 신속하게 자원기반을 전환할 수 있는 동적능력이 결정적이기 때문이다. 156개의 중국 중소제조기업을 대상으로 실증분석을 한 결과 학습역량, 재구성역량, 동맹역량이 신제품개발성과에 긍정적인 영향을 미치는 것으로 나타났고, 환경동태성이 높을수록 통합역량과 재구성역량이 신제품개발성과에 강하게 영향을 미치는 것으로 나타났다.

• Clinical and Experimental Pediatrics
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• 제48권12호
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• pp.1310-1316
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• 2005

Mechanical ventilation in children has some differences compared to in neonates or in adults. The indication of mechanical ventilation can be classified into two groups, hypercapnic respiratory failure and hypoxemic respiratory failure. The strategies of mechanical ventilation should be different in these two groups. In hypercapnic respiratory failure, volume target ventilation with constant flow is favorable and pressure target ventilation with constant pressure is preferred in hypoxemic respiratory failure. For oxygenation, fraction of inspired oxygen($FiO_2$) and mean airway pressure(MAP) can be adjusted. MAP is more important than FiO2. Positive end expiratory pressure(PEEP) is the most potent determinant of MAP. The optimal relationship of $FiO_2$ and PEEP is PEEP≒$FiO_2{\times}20$. For ventilation, minute volume of ventilation(MV) product of tidal volume(TV) and ventilation frequency is the most important factor. TV has an maximum value up to 15 mL/kg to avoid the volutrauma, so ventilation frequency is more important. The time constant(TC) in children is usually 0.15-0.2. Adequate inspiratory time is 3TC, and expiratory time should be more than 5TC. In some severe respiratory failure, to get 8TC for one cycle is impossible because of higher frequency. In such case, permissive hypercapnia can be considered. The strategy of mechanical ventilation should be adjusted gradually even in the same patient according to the status of the patient. Mechanical ventilators and ventilation modes are progressing with advances in engineering. But the most important thing in mechanical ventilation is profound understanding about the basic pulmonary mechanics and classic ventilation modes.

• 대한안전경영과학회지
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• 제2권4호
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• pp.91-102
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• 2000

Nowadays, every kind of system is changed so complex and enormous, it is necessary to assure system reliability, product liability and safety. Fault tree analysis(FTA) is a reliability/safety design analysis technique which starts from consideration of system failure effect, referred to as “top event”, and proceeds by determining how these can be caused by single or combined lower level failures or events. So in fault tree analysis, it is important to find the combination of events which affect system failure. Minimal cut sets(MCS) and minimal path sets(MPS) are used in this process. FTA-I computer program is developed which calculates MCS and MPS in terms of Gw-Basic computer language considering Fussell's algorithm. FTA-II computer program which analyzes importance and function cost of VE consists. of five programs as follows : (l) Structural importance of basic event, (2) Structural probability importance of basic event, (3) Structural criticality importance of basic event, (4) Cost-Failure importance of basic event, (5) VE function cost analysis for importance of basic event. In this study, a method of initiation such as failure, function and cost in FTA is suggested, and especially the priority rank which is calculated by computer-aided decision analysis program developed in this study can be used in decision making determining the most important basic event under various conditions. Also the priority rank can be available for the case which selects system component in FMEA analysis.

• Nuclear Engineering and Technology
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• 제54권11호
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• pp.4049-4061
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• 2022

TRISO-coated particle fuel is widely used in high temperature gas cooled reactors and other advanced reactors. The performance of coated fuel particle is one of the fundamental bases of reactor safety. The failure probability of coated fuel particle should be evaluated and determined through suitable fuel performance models and methods during normal and accident condition. In order to better facilitate the design of coated particle fuel, a new TRISO fuel performance code named FRAT (Fission product Release Analysis Tool) was developed. FRAT is designed to calculate internal gas pressure, mechanical stress and failure probability of a coated fuel particle. In this paper, FRAT was introduced and benchmarked against IAEA CRP-6 benchmark cases for coated particle failure analysis. FRAT's results agree well with benchmark values, showing the correctness and satisfactory applicability. This work helps to provide a foundation for the credible application of FRAT.

• 복식문화연구
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• 제18권3호
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• pp.526-540
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• 2010

Due to fierce competition, many domestic fashion businesses are suffering difficulty in securing and maintaining customers. Accordingly, fashion companies are devoting all their energy to secure customers by using high quality and diverse strategies for distribution and promotion, and to secure loyalty by satisfying customers with the offer of excellent service. Thus, it is very important to provide systematic service recovery strategy available for handling service failure effectively. Therefore, the purpose of this study is comprehensively analyzing influences of expectation dis-confirmation and perceived justice for service recovery upon consumers' satisfaction and loyalty. The findings are as follows. First, as for the service failure that customers experienced, the more consumers who expect it to be recovered led to the higher formation of expectation-compensation dis-confirmation. Second, it was indicated that the higher seriousness in service failure that customers experienced led to the lower satisfaction and loyalty to service recovery. Third, as a result of examining influence of expectation-compensation dis-confirmation for service-failure recovery upon consumer satisfaction and loyalty, the customers who showed more positive dis-confirmation to expectation-compensation were indicated to form the more satisfaction and loyalty. Fourth, as a result of examining the influence of the perceived justice in the process of service-failure recovery upon customer satisfaction, all in 3 dimensions of justice had effect on customer satisfaction.

• 디자인학연구
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• 제12권4호
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• pp.161-170
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• 1999

근래 소비자의 제품 선택은 단순한 소득 계층별이 아니라 다양한 라이프스타일에 따라서 변화되고 있으며, 그에 따라 수요의 다양화, 상품의 다품종화가 모든 산업에서 전개되고 있다. 즉 기업은 다양화, 다품종화 속에서 얼마나 생산성을 실현하느냐에 따라 미래 기업의 운명이 좌우되는 것이다. 본 논고에서는 제품개발에 있어서 상품성이 높은 제품개발에는 개발 과정에서의 표적시장 명확화가 불가결하다는 점에 인식에서 출발, 메이커만의 독자적 아이덴티티를 구축하여 브랜드 이미지를 형성하고, 그에 따른 브랜드 역할과 가치에 대해 자동차 사례를 중심으로 논의한 것이다. 이러한 브랜드 고유의 일관된 디자인 아이덴티티를 정립, 적용함으로서 상징성이나 감성적 성향이 점차 강조되어 가고 있는 제품속성에 대응, 고객이 만족하는 기대수준 이상의 가치를 제공하려는 데 의미가 있다.

• 반도체디스플레이기술학회지
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• 제16권3호
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• pp.121-126
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• 2017

EES System support to maximize equipment efficiency by providing real-time information of main equipment which has a significant effect on product quality and productivity, and to prevent equipment failure by detecting equipment abnormality in advance. Smart Equipment Engineering System(S-EES) integrates the activities performed at equipment that are the core of production activities and manages them by system so as to maximize the efficiency of equipment and raise the quality level of products to one level. In other words, when the product is put into the equipment, the recipe is downloaded through the RMS, the recipe is set to the optimal condition through R2R(process control), and the system detects and controls the abnormality of the equipment during operation through the FDC function in real time it means. In this way, we are working with the suitable recipe that matches the lot of product, detecting the abnormality of the equipment during operation, preventing the product from being defective, and establishing a system to maximize the efficiency through real-time equipment management. In this study, we review the present status and problems of equipment management in actual production lines, collect the requirements of the manufacturing line for the PCB line, design and develop the system, The measurement model was studied.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.574-575
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• 2021

재제조(Re-manufacturing)는 제품의 수명이 다하여 폐기단계에 있는 사용 후 제품이나 부품을 회수하여 재처리 후 신제품 조립공정과 같은 재조립 과정을 거쳐 본래 가지고 있던 제품의 기능 및 성능을 회복하도록 하는 제조방법의 하나이다. 재재조 산업은 환경보호 측면 뿐만 아니라 경제적 측면 또한 중요하다. 산업전반의 성패는 제품에 대한 신뢰 및 가격 경쟁력에 달려있다. 제품 제조 공정에서 인건비를 줄이고 제품의 신뢰도를 향상시키기 위해 영상처리 시스템을 이용한다. 본 연구에서는 폐드럼을 재생하기 위해 전처리 단계인 재활용 여부 판단 단계 및 드럼을 재생한 후 출고직전 영상처리를 이용하여 사람의 육안으로 식별이 어려운 이물질 및 불량을 검출한다.

• 한국신뢰성학회지:신뢰성응용연구
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• 제14권1호
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• pp.71-80
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• 2014

In the mechanical design process various types of errors are bound to occur. In order to prevent such mechanical malfunctions and decrease number of instances of errors, various technique are utilized. The purpose of this research is to demonstrate the effectiveness of the combined service Blueprint and FMEA (Failure Mode and Effect Analysis) by applying such method to machine process. The results are as follows: First, modification can be obtained by discovering the failure mode hidden within the inner side of the blueprint. Second, issues within the company are found when conducting the machine design process that is not visible from the outside. Therefore, potential errors can be effectively resolved by preventing failure mode in advance and eventually high quality of the product could be obtained as well as its reliability.

• 비파괴검사학회지
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• 제21권6호
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• pp.642-649
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• 2001

정밀부품이나 기기는 개발과정이나 완료단계에서 부적절한 설계에 의하여 발생할지도 모르는 잠재적인 결함을 방지하기 위하여 시험평가를 실시하게 된다. 본 논문에서는 신뢰성 기술 분야의 기초가 되는 환경시험기술을 소개하였으며 엔코더, 교통신호제어기, 계측기기 및 위성항법 수신기 등 제품단위의 대상품에 대한 시험조건 및 방법 등을 기술하고 시험사례를 보고하였다. 이러한 사례를 통하여 제품의 신뢰성 향상을 위한 복합환경시험의 중요성을 강조하였고 최근 환경시험기술에 대한 인식이 날로 증대되면서 시험기술자 양성, 지그설계기술 그리고 고장해석 및 대책기술의 확보가 매우 필요함을 제안하였다.