• 한국지진공학회논문집
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• 제26권5호
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• pp.203-209
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• 2022

A simplified method for earthquake response analysis of a rectangular liquid storage tank is proposed with fluid-structure interaction considered. In order to simplify the complex three-dimensional structural behavior of a rectangular liquid storage tank, it is assumed that structural deformation does not occur in the plane parallel to the direction in which the earthquake ground motion is applied but in the plane perpendicular to the direction. The structural deformation is approximated by combining the natural modes of the simple beam and the cantilever beam. The hydrodynamic pressure, the structure's mass and stiffness, and the hydrodynamic pressure's added mass are derived by applying the Rayleigh-Ritz method. The natural frequency, structural deformation, pressure, effective mode mass, and effective mode height of the rectangular liquid storage tank are obtained. The structural displacement, hydrodynamic pressure, base shear, and overturning moment are calculated. The seismic response analysis of an example rectangular liquid storage tank is performed using the proposed simplified approach, and its accuracy is verified by comparing the results with the reference solution by the finite element method. Existing seismic design codes based on the hydrodynamic pressure in rigid liquid storage tanks are observed to produce results with significant errors that cannot be ignored.

• 대한가정학회지
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• 제35권1호
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• pp.357-372
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• 1997

The purpose of this study was to 1) segment female adolescent consumers into consumer groups displaying different consumer decision-making styles 2) to determine the consumer characteristics(clothing involvement information search store patronage and demographic variables) that related to each consumer segment and 3) to identify the interrelationship between the consumer characteristics. Decision-making styles were measured by 32 seven-point Likert type scales adapted from Sproles & Kendall and Shim & Kot A total of 78 statements dealing with three aspects of consumer characteristics was adapted from previous research. Data were collected from 567 2nd grade female middle and high school students in Seoul via self-administered questionnaires. and were analysed by frequency factor analysis ANOVA cluster analysis χ2 -test and Duncan's multiple range test. The results of this study were as follows: As a results of cluster analysis and ANOVA on seven factors of desion-making styles(1. brand-consiousness 2. novelty/fashion-consciousness 3. recreational/hedonis-tic orientation, 4. impulsive/carelessness, 5. price-consciousness/value-for-money, 6. perfectionism/high quality orientation 7. habitual/brand-royal consciousness) three consumer groups were identified and labeled as puality-oriented/non-utlitarian shoppers price-oriented shoppers and apathetic shoppers. Quality-oriented/non-utilitarian shoppers showed the highest clothing involvement scores of all aspects the highest consumer knowledge/experience most active ongoing information search and prepurchase information search. They preferred department store and franchise store for apparel shopping and considered service/reliability atmosphere variety of goods as important store attributes, Price-oriented shoppers showed prepurchase information search and planned purchase behavior actively. They preferred factory outlet store specialty stre and considered price very important as store attributes. Apathetic shoppers showed the lowest scores of all aspects of clothing involvement and most passive behavior in information search activities except showing the highest planned purchase. They preferred regional markets.

• 복합신소재구조학회 논문집
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• 제1권3호
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• pp.41-48
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• 2010

본 논문에서는 폭발하중으로 발생하는 폭풍파의 충격하중과 폭풍파로 초래된 파편의 충돌하중을 동시에 받는 철근 콘크리트 벽체 구조물의 비선형 충돌 손상거동 해석이 수행된다. 이를 위해 먼저 가상 폭발사고 시나리오로부터 철근 콘크리트 구조물에 충격과 충돌 하중이 복합적으로 작용하는 경우를 선정한다. 폭발하중으로 인한 구조물의 저항성능을 확보하기 방안으로는 복합신소재를 보강하는 경우가 고려되고, 복합신소재를 보강하지 않은 철근 콘크리트 벽체 구조물과 보강성능을 비교하여 제시한다. 또한, 막대한 시설과 비용 투자가 요구되는 폭발실험과 근접한 해석을 도출하기 위하여 실제 충격과 충돌 현상을 정확하게 묘사한 구성방정식과 상태방정식을 포함시킨 정교한 해석을 수행한다. 폭발하중과 같은 순간적인 동적 문제를 해석하기 위하여 외연적 고속충돌 해석 프로그램인 AUTODYN-3D을 활용하여 두 가지 대상구조물에 대한 수치 모의실험을 수행하고 복합신소재로 보강된 철근 콘크리트 벽체 구조물의 보강성능을 입증한다.

• Structural Engineering and Mechanics
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• 제38권4호
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• pp.479-501
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• 2011

Even though fiber reinforced polymer (FRP) has been widely used as a retrofitting material, the FRP behavior and effect in FRP retrofitted structure under blast loading, impulsive loading with instantaneous time duration, has not been accurately examined. The past studies have focused on the performance of FRP retrofitted structures by making simplifications in modeling, without incorporating accurate failure mechanisms of FRP. Therefore, it is critical to establish an analytical model that can properly consider the specific features of FRP material in evaluating the response of retrofitted concrete structures under blast loading. In this study, debonding failure analysis technique for FRP retrofitted concrete structure under blast loading is suggested by considering FRP material characteristics and debonding failure mechanisms as well as rate dependent failure mechanism based on a blast resisting design concept. In addition, blast simulation of FRP retrofitted RC panel is performed to validate the proposed model and analysis method. For validation of the proposed model and analysis method, the reported experimental results are compared with the debonding failure analysis results. From the comparative verification, it is confirmed that the proposed analytical model considering debonding failure of FRP is able to reasonably predict the behavior of FRP retrofitted concrete panel under blast loading.

• 컴퓨터교육학회논문지
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• 제10권6호
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• pp.29-38
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• 2007

이 연구의 목적은 아동의 온라인 게임 중독 성향을 측정하기 위한 한국형 검사 척도를 과학적인 절차에 따라 개발하는 것이다. 3차례에 걸쳐 실시된 예비검사에서 문항 분석, 신뢰도 분석, 요인 분석이 수행된 결과 30문항으로 구성된 본 검사척도가 결정되었다. 본 검사에서는 준거타당도 검증을 위하여 온라인 게임 이용 실태 및 태도와 더불어 심리적 변인 4가지인 공격성 척도, 충동성 척도, 외로움 척도, 자기 통제력 척도를 포함하였고, 전국 초등학교 5, 6학년 2,584명의 학생이 조사에 참여하였다. 본 검사 결과에 대하여 문항 분석, 신뢰도 분석이 수행되었고, 탐색적 요인 분석과 준거 변인과의 상관 분석에 의해 타당도가 검증되었다. 마지막으로, 표준화 절차를 통해 7개 하위요인, 30문항으로 구성된 최종 검사 척도와 중독 집단 분류 규준을 개발하였다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2008년도 춘계 학술발표회 제20권1호
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• pp.1033-1036
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• 2008

본 논문에서는 폭발하중으로 발생하는 폭풍파의 충격하중과 폭풍파로 초래된 파편의 충돌하중을 동시에 받는 RC 벽체 구조물의 비선형 충돌 손상거동 해석이 수행된다. 이를 위해 먼저 가상 폭발사고 시나리오로부터 RC 콘크리트 구조물에 충격과 충돌 하중이 복합적으로 작용하는 경우를 선정한다. 폭발하중으로 인한 구조물의 저항성능을 확보하기 방안으로는 GFRP 재료를 보강하는 경우가 고려되고, GFRP 무보강 RC 구조물과 보강성능을 비교하여 제시한다. 또한, 막대한 시설과 비용 투자가 요구되는 폭발실험과 근접한 해석을 도출하기 위하여 실제 충격과 충돌 현상을 정확하게 묘사한 구성방정식과 상태방정식을 포함시킨 정교한 해석을 수행한다. 폭발하중과 같은 순간적인 동적 문제를 해석하기 위하여 외연적 고속충돌 해석 프로그램인 AUTODYN-3D을 활용하여 두 가지 대상구조물에 대한 수치 모의실험을 수행하고 GFRP로 보강된 RC 벽체 구조물의 보강성능을 입증한다.

• 한국의상디자인학회지
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• 제23권2호
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• pp.1-15
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• 2021

The purposes of this study was to investigate the effects of materialism value on the clothing shopping orientation and impulse buying behaviors of Chinese female consumers. The subjects were 417 female millennials in Gillim-province, China. The research method was a survey, and the questionnaire consisted of questions to ascertain materialism value, clothing shopping orientation, impulse buying behaviors, and the subjects' demographic characteristics. For data analysis, descriptive statistics, Cronbach's α, factor analysis, and regression analysis were performed. The results of this study were as follows: First, materialism value was derived with 3 factors (happiness pursuit, possession-oriented, and success judgement). Second, the clothing shopping orientation was derived with 5 factors (trend pursuit, pleasure pursuit, brand pursuit, economic pursuit, and convenience pursuit). Third, the impulse buying behavior was derived with 4 factors (pure, planned, reminder, and implicit impulse buying). Forth, materialism value had significant effects on clothing shopping orientation. The higher the value of materialism, the more the brand pursuit, pleasure pursuit, and trend pursuit shopping orientation increased, while the economic pursuit and convenience pursuit shopping orientation decreased. Fifth, materialism value had significant effect on pure and planned impulse buying behaviors. As the value of materialism increased, pure and planned impulsive buying behaviors increased. This study suggested that materialism value is an effective variable to understand the clothing shopping orientation and clothing impulse buying behavior.

• 한국산학기술학회논문지
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• 제15권12호
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• pp.7459-7466
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• 2014

이 연구는 최근 증가하고 있는 국외 관광자 중에서 화장품을 구매하는 관광자의 구매행동과 내국인의 화장품 구매행동을 파악하기 위하여 실시되었다. 특히 중국과 일본인 관광자 및 내국인을 대상으로 화장품 구매행동의 속성과 그 영향 및 집단간 차이가 있는 지를 밝히기 위함이 연구목적이다. 연구목적을 달성하기 위하여 문헌 연구와 실증연구가 실시되었다. 문헌연구에서는 화장품 구매행동과 관광자 쇼핑성향을 검토하여 실증연구를 위한 선행연구를 검토하였다. 실증연구는 국내를 방문하는 중국인과 일본인 관광자를 대상으로 설문지를 이용한 실증조사를 실시하여 조사된 자료의 신뢰성과 타당성을 검증하고 회귀분석과 분산분석을 실시하였다. 연구결과는 첫째, 화장품 구매행동은 기능성, 브랜드 지향성, 최신성, 충동성, 물리적 환경의 5개 요인이 추출되었다. 특히 소비자들은 연구자들이 이미 주목한 바 있는 기능성 중심의 화장품 구매에서 보다 복잡한 형태의 구매 즉 브랜드나 최신상품을 구매하려는 성향을 보인다. 더불어 구매전 후에 따라 구매행동 평가가 달라짐도 밝혔다. 그러나 중국, 일본 및 내국인별 화장품 구매속성은 화장품의 기능성 이외의 항목에서는 큰 차이가 없다. 이 연구결과로 볼 때 국내 화장품 기업도 브랜드를 강조하는 전략을 우선시해야 한다. 또한 화장품의 기능성 개발에 노력해야 하고 판매장소의 분위기와 판매원의 태도에 대한 노력도 기울여야 한다.

• 성인간호학회지
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• 제14권1호
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• pp.144-153
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• 2002

Purpose: The purpose of this study was to describe the premenstrual syndrome and the relationships among premenstrual syndrome, automatic thought, and perfectionism. Methods: The 164 subjects were selected from a nursing college in Tae-Jeon. The data were collected using the PAF, ATQ-N, and MPS from April 10th to May 10th, 2001. Results: The results of this study were as follows : 1. There was no significant difference in premenstrual syndrome due to menarche, duration of menstruation, and menstrual cycle, but significant difference in premenstrual syndrome due to amount of menstruation and regularity of menstrual cycle. 2. The subjects experienced mild premenstrual syndrome. The severe premenstrual syndromes above the mean were who subjects reported general physical discomfort, fatigue, low mood and loss of pleasure, lability and atypical depressive features, et. al., and those below the mean experienced hostility/anger, increased well-being, miscellaneous mood/behavior change, impulsive syndrome and miscellaneous physical changes, et. al. 3. The score of mean premenstrual syndrome was 236.55, that of automatic thought was 31.41 and that of perfectionism was 185.97. The premenstrual syndrome score was similar to those of other studies and subjects had low automatic thought and moderate perfectionism. 4. There were significant correlations among premenstrual syndrome, automatic thought, and perfectionism (P <. 001). 5. Automatic thought and perfectionism accounted for 17 percent of premenstrual syndrome. Conclusions: For future research, it was recommended that the study to identify major factors affecting premenstrual syndrome and the relationships between them with various subjects should be done and effective nursing intervention for premenstrual syndrome should be developed.

• 정신신체의학
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• 제4권2호
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• pp.198-206
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• 1996

To assess premenstrual changes in adolescents, a self rating retrospective premenstrual assessment from(PAF) and a prospective daily rating form(DRF) were administered to 230 high school students who reported premenstrual changes. The results were as follows 1) According to typological categories of retrospective premenstrual assessment form, the most commonly reported changes in mood and behavior were major depressive syndrome(40.0%), impulsive syndrome(20.9%). Especially among the subtype of depressive syndrome, hostility feature and withdrawal feature were most frequent. The most commonly reported changes in physical condition were general discomfort(73.5%), fatigue(33.9%). 50.9% of all subjects reported impaired social function. 2) 41.2% of the subjects who met the criteria for typological categories of retrospective premenstrual assessment form were confirmed by prospective daily rating form. 3) According to different criteria of percent change method of assessing symptom change, 38.7% of all subjects had at least one mild premenstrual change and 23.5% had at least one moderate premenstrual change. 4) Using prospective daily rating form, overall psychological changes were confirmed more frequently than physical changes. Of the mild premenstrual changes, 'low energy, tired & weak', 'less or impaired work' were most common changes. Of the moderate premenstrual changes, the most common change was 'low energy, tired & weak'. 5) As attitude toward menstruation, 44.9% of the subjects with confirmed premenstrual changes had more negative attitude(disgusted) toward menstruation. 6) The subjects with confirmed mild or moderate premenstrual changes had only dysphoric mood changes or both physical and dysphoric mood changes, but did not have only physical changes. These results suggest that retrospective reports of premenstrual changes were partially confirmed by daily prospective ratings. A substantial number of adolescents appeared to experience premenstrual changes, and the most common confimed premenstrual change of mild or moderate severity was 'low energy, tired and weak'.