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      • KCI등재

        A New Levelling Process Using Skew-Arranged Roll Sets for the Doubly-Curved Plate

        이창환,양동열,함형철,윤성필 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.10

        In order to flatten the doubly-curved plate both in the longitudinal direction and in the transverse direction, a new levelling process using skew-arranged roll sets was proposed. The effect of the levelling process using skew-arranged roll sets was investigated with finite element analysis. Skew angle of the roll set determines the ratio of the bending moment in the longitudinal direction to the bending moment in the transverse direction. The intermesh of the roll set determines the magnitude of the deformation. Sheets with sheared protrusions, which were bent in both directions, were employed in experiments of the levelling process using skew-arranged roll sets. In the finite element analysis and experiments, bending deformation in both directions was removed at the same time by using the levelling process using two skew-arranged roll sets.

      • 訓練 및 競技에 隨伴되는 主要 스포츠 傷害에 關한 硏究

        李昌煥 韓國體育大學校 1980 論文集 Vol.2 No.-

        In this thesis 506 students of Korean National College of Physical Education have been carefully handled with a view to finding a datum of major athletic injuries caused during their practices or participations in fourteen kinds of individual sports from April, 1978 to March,1980. I have found an annual average of 49% major athletic injuries have been reported. In my point of view, as superintendent of health service center of Korean National College of Physical Education, the control or the taking care of their physical fitness alone can reduce their athletic injuries. Frequent athletic injuries have been found sprain, strain, contusion or contused wounds, back-pain, intervertebral dise herniation, tonities and tenosynovitis, and fracture. This tendency does not differ from that of other countries. Ataletes of cycling, weight-lifting and judo are frequently injured while those of boxing, wrestling and fencing are occasionally injured. Sericus athletic injuries have boon reported from athletes, judomen, wroslers, cycliets, boxers, and weight-lifters, and careful meaeures should by taken to look after these athletes with a thought of finding a suitable way of contrelling their physical fitness. Frequent injury sections of sprain have been found elbow joints: and shoulder joints and they are more frequent than those of athletes of other contries. A further study on the cause of overy strain and frequent athletic injuries would be very helpful to reduce serios sports injuries since the control of physical fitness is the key to solving the technical instructions in sports.

      • KCI등재
      • KCI등재

        고밀도 극세사 닦음포의 고기능화

        이창환,이준희,이경주,박근후,김성훈,Lee, Chang-Hwan,Lee, Jun-Hee,Lee, Kyung-Ju,Park, Keun-Hoo,Kim, Seong-Hun 한국섬유공학회 2010 한국섬유공학회지 Vol.47 No.2

        To obtain high performance microfiber knit wiping cloth used for manufacturing electronic devices benzyl alcohol pretreatment method was optimized. WAXD patterns of the PET, nylon and nylon/polyester filament fibers pretreated with benzyl alcohol showed stronger crystalline peak than 50d/14f fibers. Some properties including wiping efficiency of the wiping cloths made of 75d/36f filament fibers of nylon/PET(N/P) and the ones made of 50d/14f fibers were tested and compared. Results showed that water absorption rate of the former was higher than that of the latter. The former showed excellent removing efficiency of approximately 90% compared to 60% for the latter. Air particle counter analysis revealed that the former has less residue content than the latter.

      • KCI등재

        보상 프로그램, 어떻게 실행해야 하는가?: 제품 유형, 보상 시기, 보상 내용의 효과

        이창환,나준희 한국상품학회 2018 商品學硏究 Vol.36 No.1

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.

        The customer reward program is a very good corporate marketing strategy to build loyalty with customers. However, businesses have a lot of financial burden in implementing a customer reimbursement program. Accordingly, businesses need to design a very effective customer reward program. Firms need to consider many constraints when designing customer reward programs. However, previous studies lacked a comprehensive judgment on this. This study emphasizes the practical use of the customer reward program. This study proposes an effective customer reward program, taking into consideration the type of reward product, the timing of the reward and the contents of the reward. The study was conducted using experiments. Studies have shown that the interaction effects of the product type × reward timing are significant. That is, consumers had a more positive assessment of immediate rewards than delayed rewards if the rewards were practical ones. However, there was no difference between immediate and delayed payment for hedonic products. The interaction effects of reward contents × reward timing are noted. That is, consumers were more immediately optimistic about immediate reward programs with a small amount of reward and a high probability of reward compared to late payment. However, there was no difference between immediate and delayed reward programs with high levels of reward and low probability of reward. Note the interaction effects of product type × reward contents. That is, consumers have assessed more positively a substantial reward for practical products, less reward for low-probability reward programs, and more probability-prone rewards. However, for the hedonistic products, the rewards were more positive than the small rewards, the high probability reward programs, and the rewards were lower probability. 고객보상 프로그램은 고객의 충성도를 높이기 위한 매우 훌륭한 기업의 마케팅 전략이다. 그러나 기업이 고객보상 프로그램을 실행하기에는 많은 재정적 부담이 있다. 이에 따라 기업에서는 매우 효과적인 고객보상 프로그램을 설계해야 한다. 기업은 고객보상 프로그램의 설계시에 많은 제약조건을 고려해야 한다. 그러나 기존 연구에서는 이에 대한 종합적 판단이 부족한 측면이 있었다. 본 연구는 고객보상 프로그램의 실무적 활용을 강조하고 있다. 본 연구는 보상 제품의 유형, 보상의 시기, 보상 내용을 고려하여 효과적인 고객보상 프로그램에 대해서 제안하고 있다. 본 연구는 실험을 이용하여 연구를 진행하였다. 연구결과, 제품 유형×보상 시기의 상호작용효과가 유의하였다. 즉, 소비자는 보상 제품이 실용적 제품인 경우에 지연보상보다는 즉각보상을 더 긍정적으로 평가하였다. 그러나 쾌락적 제품인 경우에는 즉각보상과 지연보상 간에 차이가 없었다. 보상 내용×보상시기의 상호작용효과가 유의하였다. 즉, 소비자는 보상의 양이 적고 보상 확률이 높은 보상 프로그램에 대해서 지연보상에 비해 즉각보상을 더 긍정적이었이었다. 그러나 보상의 양이 많고 보상 확률이 낮은 보상 프로그램에 대해서 즉각 보상과 지연 보상 간에는 차이가 없었다. 제품 유형×보상 내용의 상호작용효과가 유의하였다. 즉, 소비자는 실용적 제품의 경우 많은 보상, 낮은 확률의 보상 프로그램에 비해 적은 보상, 높은 확률의 보상 프로그램을 더 긍정적으로 평가하였다. 그러나 쾌락적 제품의 경우에는 적은 보상, 높은 확률의 보상 프로그램에 비해 많은 보상, 낮은 확률의 보상에 대해서 더 긍정적이었다.

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