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이재용(Jae Yong Lee),이철성(Chul Sung Lee),이호배(Ho Bae Lee) 한국경영학회 2012 經營學硏究 Vol.41 No.6
Many companies frequently use price discount of which many sales promotion designed to motivate customer purchase, and this price discount influences on consumer purchase. There are many price discounts and it is easy to see price discount with time scarcity message like This special price is for today only, Price Drop Hits, But Only This Week, and quantity scarcity message like This special price is limited to 100 people ONLY!, Special price, limited to only 30 pieces. Consumers have been influenced by price discount promotion with scarcity message (time/quantity) more than the only price discount promotion without scarcity message (time/quantity). Previous studies have showed that scarcity message (time/quantity) would make the consumer purchase hurry, So, we suggest that price discount promotion would interact with scarcity message to purchase, To explore this relationship, We investigate the empirical research regarding how price discount interacts with scarcity message type (time/quantity) to purchase. The purposes of this research are as follows; First, we would explore the effects of price discount with scarcity message (time/quantity) on the consumer`s purchase intention and the effects of price discount with scarcity message (time/quantity) on the consumer`s purchase intention using the level of brand power and consumer`s uncertainty avoidance tendency as moderators. Second, we also would researches the diminishing effect of consumer`s negative responses that might appear after the period of the price discount is finished. The findings of this research are summarized as follows: First, The result shows that the price discount with scarcity message is more effective than price discount without scarcity message on the consumer`s purchase intention. This means that the suggestion of limited numbers is more effective than the suggestion of time limits on consumer`s purchase intention. Second, there is a significant interaction effect between the type of price discount with scarcity message and brand power. Specifically, the differential effects of price discount with quantity scarcity message vs. price discount with time scarcity message are enhanced when the advertised brand has a strong brand power vs. weak brand power. Third, there is a significant interaction effect between the type of price discount with scarcity message and the level of uncertainty avoidance tendency. Specifically, the differential effects of price discount with quantity scarcity message vs. price discount with time scarcity message are enhanced at the low level of uncertainty avoidance tendency, Fourth, there is less negative response about consumer`s attitudes and purchase intention regarding a particular brand with the price discount with quantity scarcity message than the price discount without scarcity message, This means that the price discount with the quantity scarcity message can be more less negative effectiveness after the period of discount is finished. According to the results of study, we could conclude that the price discount with time/quantity messages are more effective than the price discount without time/quantity messages in influencing consumers` purchase intentions. Also, we founded that brand power and consumer`s uncertainty avoidance tendency could effect on this relationship as a moderator. Finally, when the price discount is over, the discount with scarcity messages could prevent consumers` negative response more than the simple discount message.
논문 : 제조공정 ; 분무성형에서의 공정변수의 최적화 (1) -초기분무온도의 제어에 관하여
이재철 ( Jae Chul Lee ),석현광 ( Hyun Kwang Seok ),신돈수 ( Don Soo Shin ),이호인 ( Ho In Lee ) 대한금속재료학회 ( 구 대한금속학회 ) 1998 대한금속·재료학회지 Vol.36 No.6
Effect of the initial melt temperature on the microstructure of the sprayformed 2014 Al billet was studied with particular emphasis on the effect of superheating on the liquid fraction(FL) in the sprayed droplets. In order to determine the average liquid fraction within the sprayed droplets, the cooling rate and the flight time of droplets were calculated. The measured cooling rate of droplets was in the vicinity of ~104℃/sec and the flight time before impinging the preform ranges from 6 to 9 msec depending on the size of droplets. The obtained results from the experiments were in good agrement with those of theoretical models by P. Grant et al. and/or Lee et al. The liquid fraction of droplets did not vary significantly with the initial melt temperature such that FL was calculated to be 24% when Ti = 800℃ while FL = 19.5% when Ti = 720℃, resulting in considerable amount of porosity within the preform. Such a result indicates that the initial melt temperature control may not be effective for fabricating preforms with a minimal amount of porosity.
탄화수소계 냉매를 이용한 수냉식 히트점프의 성능특성에 관한 연구
전철호,이호생,김재돌,윤정인,Jun Chul-Ho,Lee Ho-Saeng,Kim Jae-Dol,Yoon Jung-ln 한국마린엔지니어링학회 2005 한국마린엔지니어링학회지 Vol.29 No.8
This study of the performance characteristics of natural refrigerants such as R-290 (propane), R-6OOa (iso-butane) and R-1270 (propylene) has investigated to compare with conventional HCFC's refrigerant R-22 for water-cooled heat pump system. The experimental apparatus has basic parts of cycle that uses the water as a heat source. The Performance of the water-cooled system using hydrocarbon refrigerants had been getting better than R-22 from start-up to the similar evaporating temperature after stabilizing system. Through the above it is possible that hydrocarbon refrigerants could be drop-in alternatives for R-22.
김기배,김경민,이재철,이호인,윤의박,조남돈 ( Ki Bae Kim,Kyoung Min Kim,Jae Chul Lee,Ho In Lee,Eui Pak Yoon,Nam Don Cho ) 한국주조공학회 1996 한국주조공학회지 Vol.16 No.3
N/A The effect of forced convection on the solute redistribution of the Al ingot is studied in an effort to fabricate high purity aluminum using a fractional solidification processing. Experimental setup is built in order for the Al melt to be solidified from the surface of the graphite cooling tube, which is rotated at a constant revolution rate to generate the forced convection environmental ahead of the solidification front. Based on the experimental results, Fe and Si concentrations, added as impurities within the Al ingot, decrease as the distance measured from the graphite tube and growth rate decreases and as revolution speed increases. In the case of Al melt with high initial solute concentration, spiral columnar grains tend to form along a direction of revolution. In the case of Al melt with low solute concentrations, however, grains tend to grow with planar geometry. In the fractional solidification process, the solute concentration within the solid phase tends to decrease at the early stage of solidification, reaches minimum concentration, and then increases gradually as solidification proceeds. The solute redistribution obtained based on the BPS model incorporated with the tangential flow component as well as the axial flow component within the melt, agree well with the measurements under sufficiently high revolution speed and low solidification rate.
수렴성 빔 전자회절법을 이용한 $SiC_p/Al$ 복합재에서의 계면 생성물의 상분석
이정일,이재철,석현광,이호인,Lee, Jung-Ill,Lee, Jae-Chul,Suk, Hyun-Kwang,Lee, Ho-In 한국현미경학회 1996 Applied microscopy Vol.26 No.1
A comprehensive methodology to characterize the interfacial reaction products of $SiC_p/2024$ Al composites is introduced on the basis of the experimental results obtained using XRD, SEM and TEM. XRD performed on the electrochemically extracted $SiC_p$ and bulk $SiC_p/2024$ Al composite have shown that the interfacial reaction products consist of $Al_{4}C_3$ having hexagonal crystallographic structure, pure eutectic Si having diamond cubic crystallographic structure, and $CuAl_2$, having tetragonal crystalloraphic structure, respectively. According to the images observed by SEM, $Al_{4}C_3$, which has been reported to have needle shape, has a hexagonal platelet-shape and eutectic Si is found to have a dendritic shape. In addition eutectic $CuAl_2$, was observed to form near interface and/or along the grain boundaries. In order to confirm the results obtained by XRD, the primitive cell volume and reciprocal lattice height of such interfacial reaction products were calculated using the data obtained from convergent beam electron diffraction (CBED) patterns, and then compared with theoretical values.