• 한국의류산업학회지
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• 제21권6호
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• pp.743-753
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• 2019

This study investigates differences in demographic characteristics, shopping orientation, perceived risk, and satisfaction after purchase among consumer types. This study classifies consumer types according to their channel transition behaviors between the online and offline channels with a focus on the steps of information research and buying decision in buying decision-making process. The four consumer groups are as follows: off-off type (offline research-offline purchase), on-on type (online research-online purchase), on-off type (online research-offline purchase) and on/off-off type (online and offline research-offline purchase), off-on type (offline research-online purchase) and on/off-on type (online and offline research-online purchase). Data were collected from adults over 20 years old who had bought clothes within one year. The questionnaire was carried out from July, 2019 using a professional internet research panel; in addition, 500 sets of useful data were analyzed by descriptive statistics, factor analysis, reliability analysis, chi-squared test, ANOVA and Duncan-test using SPSS 21.0. The findings showed significant differences among the classified consumer groups for consumer demographics, shopping orientation, perceived risk, and purchase after satisfaction. The results imply that consumers show a variety of channel transition behaviors based on demographic variables, shopping orientation, and perceived risk. Understanding and adapting to consumer purchase behaviors will allow company distribution channels to be effectively managed and eventually increase consumer satisfaction as well as company sales volume.

• 대한화학회지
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• 제7권2호
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• pp.96-105
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• 1963

The weight decrease curves of 18 kinds of polymers have been measured by thermobalance at the same condition where temperature is increased $1^{\circ}C$ per minutes under nitrogen or air atmosphere. The curves are further differentiated to obtain rate curve of weight decrease. Those curve offer a method to compare relative thermal stability, effects of oxygen or modes of thermal degradation of polymers qualitatively. The curves could be classified into following four types: Polystyrene, polymethylmethacrylate and acetal polymer belong to the first type. Those polymers depolymerize mainly into corresponding monomers, weight decrease curves are steepy up to perfect vaporization of polymers and rate curves show a relatively sharp peak. (Type I) Polyvinyl chloride represents the second type. This polymer decomposes with splitting off of hydrogen chloride. The thermogravimetric curve rises rapidly at first, then level off at the moderate weight decrease and gradually rises. Polyvinyl acetate also belongs to this class. (Type II) The modification of the second type is represented by polyester. The curve at the early stage is less steep, the leveling off at the next stage is less clear and the final rising of the curve is steeper than the normal second type. Polyamide, polyurethane, and polycarbonate belong to this type. (Type II') The thermal decomposition of the third type polymers is more complex than that of others. Various irregular chain scissions including side chain splitting and depolymerization to monomers occur simultaneously. The weight of the polymer decreases gradually and the rate curve does not show sharp peaks. Polyvinyl alcohol and diene polymers belong to this type. (Type III) Generally, polycondensation polymers are more stable toward heat than addition polymers and polymers having aromatic nucleus show good thermal stability. Polymers having tertiary carbon atoms such as polystyrene or polypropylene and acetal resin start decomposition under airatmosphere at the temprature below $50^{\circ}C$ or more of the temperature where the polymers start decomposition under nitrogen atmosphere.

• 한국응용과학기술학회지
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• 제38권6호
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• pp.1643-1653
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• 2021

본 연구는 뷰티라이프스타일이 중년여성의 삶의 질에 미치는 영향에 대하여 알아보는 것이다. 본 연구를 위하여 서울, 경기, 광주, 세종, 대전에 거주하는 35세-65세의 중년여성 417명을 대상으로 2021년 2월 27일부터 2021년 3월 14일까지 실시하였다. 연구의 결과로 중년여성의 뷰티라이프스타일에 따른 삶의 질의 상관관계는 과시추구형, 외모추구형, 실용추구형, 유행추구형순으로 정의 상관관계가 나타났다. 또한 중년여성의 삶의 질에는 뷰티라이프스타일의 실용추구형과 과시추구형이 영향을 미치는 것으로 나타났다. 따라서 중년여성의 삶의 질에 매우 긍정적인 영향을 줄 수 있는 실용추구형과 과시추구형을 위한 경제성과 고급화를 추구하는 양가적 관점에 기인한 맞춤형 커뮤니케이션의 정보와 뷰티제품의 마케팅 전략이 필요하다고 사료된다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 D
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• pp.1947-1949
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• 1999

Carrier lifetime in silicon power devices caused switching delay and excessive power loss at high frequency switching. We studied transient turn-on/turn-off transient characteristics of electron irradiated and proton irradiated silicon pn junction diodes. Both the electron and proton irradiation of power devices have already become a widely used practice to reduce minority carrier lifetime locally[1]. The sample is n+p junction diode, made by ion implantation on a $20\Omega.cm$ p-type wafer. We investigated turn-on/turn-off transient & breakdown voltage characteristics by digital oscilloscope. Our data show that proton irradiated samples show better performance than electron irradiated samples.

• 패션비즈니스
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• 제12권5호
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• pp.14-23
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• 2008

Recently, our society has been expanding with its consumption of brand products as it is referred to as brand product syndrome. In particular, the trend is that young consumers in 20$\sim$30s prefer the fashion brand product for their wedding. In our study, the lifestyle and shopping tendency of consumers who prefer the fashion brands are found out, and the influence impacted on the intent of repurchase of fashion brand product are clarified through the path analysis with the following outcome. First, for the group factors in life style of the consumers who prefer fashion brand products for wedding, it is shown with the self-advancement type, home striving type, economy striving type, high class brand striving type, and social activity type. Second, as for the factor of shopping tendency of the consumers who prefer fashion brand products for wedding, it appears for the factors of pursuing for enjoyment, pursuing for show off, pursuing for individuality, and pursuing for convenience. And third, when the life style group for high class brand type of consumers goes for shopping for fashion brand for wedding, it displays the shopping tendency for pursuing for enjoyment, pursuing for show off, and pursuing for individuality, and these factors influence the most in the intent to re-purchase of fashion brand goods.

• 한국전산구조공학회논문집
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• 제18권3호
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• pp.227-243
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• 2005

본 논문에서는 지진하중을 받는 사장교에 납고무받침과 유압식 가력기를 결합한 복합제어 시스템을 적용하였다. 복합제어 시스템은 다중의 제어장치로 인해 제어성능의 향상을 기대할 수 있지만 추가적으로 사용되는 능동제어 장치로 인하여 전체 제어시스템의 강인성이 저하될 수 있다. 따라서 본 연구에서는 복합제어 시스템의 강인성을 향상시키기 위해 기존의 LQG 알고리즘에 납고무받침의 응답에 따른 on-off 형태의 알고리즘을 결합하였다. 수치해석 결과 on-off 형태의 LQG 알고리즘을 사용한 복합제어 시스템은 납고무받침을 사용할 수동제어 시스템이나 유압식 가력기만을 사용한 능동제어 시스템과 비슷한 최대제어력이나 평균제어력을 사용하면서 제어성능이 향상되었으며, 기존의 성능에 초점을 둔 LQG 알고리즘만을 사용한 복합제어 시스템과 유사한 제어성능을 나타냈다. 또한 제안된 제어시스템은 구조물의 강성행렬에 교란이 있을 때 기존의 LQG 알고리즘만을 사용한 복합제어 시스템에 비해 강인성이 향상되었으며 교란된 시스템에 대해 불안정성을 보이지 않았다. 제안된 제어시스템은 설계지진뿐만 아니라 다른 입력지진에 대해서도 제어성능을 유지하였다. 따라서 On-Off 형태의 LQG 알고리즘을 사용한 복합제어 시스템은 불확실성이 많은 지진하중을 받는 사장교에 개선된 제어기법으로 제안될 수 있다.

• 제어로봇시스템학회논문지
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• 제8권11호
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• pp.984-990
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• 2002

We propose a new type of nonlinear fixed interval smoother to which an existing nonlinear smoother is modified. The nonlinear smoother is derived from two-filter formulas. For the backward filter. the propagation and the update equation of error states are derived. In particular, the modified update equation of the backward filter uses the estimated error terms from the forward filter. Data fusion algorithm, which combines the forward filter result and the backward filter result, is altered into the compatible form with the new type of the backward filter. The proposed algorithm is more efficient than the existing one because propagation in backward filter is very simple from the implementation point of view. We apply the proposed nonlinear smoothing algorithm to off-line navigation system and show the proposed algorithm estimates position, and altitude fairly well through the computer simulation.

• International Journal of Contents
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• 제2권3호
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• pp.22-26
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• 2006

In this paper we introduce a new circle detection algorithm for occluded on/off pupil and iris boundary extraction. The proposed algorithm employs 7-step processing to detect a center and radius of occluded on/off eye images using the property of the chords. The algorithm deals with two types of occluded pupil and iris boundary information; one is composed of circle-shaped, incomplete objects, which is called occluded on iris images and the other type consists of arc objects in which circular information has partially disappeared, called occluded off iris images. This method shows that the center and radius of iris boundary can be detected from as little as one-third of the occluded on/off iris information image. It is also shown that the proposed algorithm computed the center and radius of the incomplete iris boundary information which has partially occluded and disappeared. Experimental results on RGB images and IR images show that the proposed method has encouraging performance of boundary detection for pupil and iris segmentation. The experimental results show satisfactorily the detection of circle from incomplete circle shape information which is occluded as well as the detection of pupil/iris boundary circle of the occluded on/off image.

• 한국항해학회지
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• 제11권2호
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• pp.53-59
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• 1987

This paper describes the design theory of a weakly-coupled Tap-off with high density of coupling intervals for CATV and/or MATV systems, by which the degree of freedom in design and density of coupling intervals are significantly increased compared with the intrinsic one. It is also described how to construct the two-way divider (Tap-off) in the generalized type. Furthermore, the practical measurements of the frequency characteristics for a fabricated circuit show very good agreements with theoretical results.

• 농촌계획
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• 제20권4호
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• pp.193-208
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• 2014

This study aims to identify feasible policy direction of the 6th industrialization in agriculture based on the current agricultural and rural environment in Korea. To do so, this study employes a heckman selection model to correct a probable selection bias, utilizing the Korean agricultural census in 2010 and the agricultural statistics of farm enterprises in 2011. This study focuses on the differences of the farm and off-farm income determinants, according to conjoint types of the 6th industrialization such as Type 1 (primary+secondary+tertiary) vs. Type 2 (primary+secondary or primary+tertiary). The empirical results show Type 2 has much higher possibilities to earn farm and off-farm income in Korea, especially for farm enterprises. This study concludes with providing some policy implications reflecting rural and agricultural environment in Korea.