• 대한기계학회:학술대회논문집
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• 대한기계학회 2000년도 추계학술대회논문집A
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• pp.286-291
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• 2000

The reactor pressure vessel is usually cladded with stainless steel to prevent corrosion and radiation embrittlement, and number of subclad cracks have been found during an in-service-inspection. Therefore assessment for subclad cracks should be made for normal operating conditions and faulted conditions such as PTS. Thus, in order to find the optimum fracture assessment procedures for subclad cracks under a pressurized thermal shock condition, in this paper, three different analyses were performed, ASME Sec. XI code analysis, an LEFM(Liner elastic fracture mechanics) analysis and an EPFM(Elastic plastic fracture mechanics) analysis. The stress intensity factor and the Maximum $RT_{NDT}$ were used for characterizing. Analysis based on ASME Sec. XI code does not completely consider the actual stress distribution of the crack surface, so the resulting Maximum allowable $RT_{NDTS}$ can be non-conservative, especially for deep cracks. LEFM analysis, which does not consider elastic-plastic behavior of the clad material, is much more non-conservative than EPFM analysis. Therefore, It is necessary to perform EPFM analysis for the assessment of subclad cracks under PTS.

• 한국의류학회지
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• 제28권1호
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• pp.76-87
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• 2004

The purpose of this study was to investigate the differences in adolescents' conspicuous consumption, and their attitude toward and purchasing behaviors for the imported luxuries and the famous brand clothing. A questionnaire survey was conducted to 570 high school students in Seoul; 538 were used for final data analysis. Factor analysis, cluster analysis, $\chi$$^2$-analysis, one-way ANOVA, Duncan's Multiple Range test were used for the statistical analyses. In terms of conspicuous consumption, three factors were formulated: brand and fashion orientation, others orientations, and prize and import orientation. Based on the factor scores, three clusters were identified: the inconspicuous, the others-oriented conspicuous, and the brand-oriented conspicuous. Regarding attitudes toward the products, significant differences were found in all attitudes. The brand-oriented conspicuous showed more favorable attitude toward the products than the other groups. Significant differences were also found in purchasing behaviors except the companions for shopping and purchase time. The brand-oriented conspicuous tended to purchase more, spend more money, prefer department stores, consider brand name and customer service as the most important criteria, and use impersonal informations sources when shopping the products. The other-oriented conspicuous tended to buy bogus products the most, use personal information and consider price and others' perception as important criteria. The inconspicuous were less likely to buy and spend money for the products.

• 대한가정학회지
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• 제38권3호
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• pp.131-147
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• 2000

The purpose of this study was to identify food management behavior of housewives in island areas and to find if the behavior patterns were different between the regions, Hansan and Ullung island. An instalment based on previous researches was designed to measure food management behavior and was administered to 274 housewives in 1994 and 1998. Considering the condition of cooking-equipment possession, the percentage of possession for refrigerator, mix, electric range were significantly higher for households in Hansan Island than their counterparts. For food-budget planning, those in Ullung Island were more likly to plan their budget than those in Hansan Island. Menu planning patterns, considerable factors for food selection as well as cooking, and eating habits between meals were tuned out to be different between Hansan and Ullung areas. The findings of this study suggest that the condition of cooking-equipment possession, food-budget and menu planning, considerable factors for food selection and cooking, eating habits between meals were likely to vary depending on regions. Although housewives in two areas were living in island, they were not necessarily be uniform for all households but were diversified in food management behavior. Half of the respondents in Hansan Island and three-forth of the respondents in Ullung Island reported they had not planned their meal budget. The percentage of those who did not have their planned menu was 52.7∼54.1% in Hansan Island and 37.1∼38.5% in Ullung Island. When purchasing food material, housewives in Hansan Island consider the seasoning food as the most important factor, whereas those in Ullung Island consider family preference as the most important factor

• 한국실내디자인학회논문집
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• 제25권2호
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• pp.41-49
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• 2016

The purpose of this study is to analyze the change and to compare to the difference of 'selective elements' and 'space-memory' focusing on the theory, 'selective attention' through the survey results. In this study, In this study, the lighting is considered a important factor in the change of 'selective elements'. this survey is to find the selective elements of participants and to measure the spatial sensitivity of respondents through 'self- test'. The analysis in this study is conducted by descriptive statistics, t-test and one way ANOVA by SPSS program 22. The results of this study are as following; Firstly, 'attention-element' could be classified with 4 types, 'shape', 'material', 'contrast' and 'combination'. 'shape' could divide into 'structure' and' furniture and object'. In case of 'material', it could section with 'pattern' and 'color'. Secondly, through the results of study, 'attention-element' is different each space during the day in detail. But we could know that 'shape' is the important element of the 'attention-elements' during the day through comparison of this result. That means users consider this as a important factor when they evaluate the space. Therefore, it is effective way designers to consider 'shape' as the first element when they want to conduct the special sensitivity of users in the space through planning. On the other hand, what selective elements of users are different by the lighting situation should be acknowledged by designers. And they should think the kinds of selective elements are more various when lighting turns on than turns off.. Thirdly, through the results such as the meaningful difference of space-memory of users according to the change of 'attention-elements', designers should judge about which kind of feeling of users to the space do you want lead in the design process. For the effective feedback between spaces and users to induce the same emotion of users, designers need to consider the unified design and the individual design both. Also, we will regard the differences in the users' emotion to the space according to the lighting situation when we design the space.

• 응용통계연구
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• 제13권2호
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• pp.427-436
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• 2000

이 논문에서는 신뢰수명자료의 분석에 많이 사용되는 지수분포, 와이블분포, 로그정규분포에 대해, 현재의 자료가 어느 분포에 가장 적합한가를 알아보기 위한 베이자안 모형 선택방법을 제안한다. 일반적으로, 모수에 대한 사전분포가 부적절 분포인 경우, 베이즈 요인(Bayes factor)은 미지의 상수를 포함한다. 이러한 문제점을 해결하기 위하여 O’Hagan(1995)에 의해 제안된 fractional Bayes factor를 이용하여 자료를 가장 적합시키는 모형을 찾는다. 특히, 제2종 중도절단자료가 주어진 경우. 이 자료를 이용한 베이지안 모형선택에 대한 연구는 거의 이루어진 바가 없다. 실제 자료와 인위적인 자료를 이용하여 로그정규분포, 지수분포, 와이블모형중 어느 모형에 가장 잘 적합한지를 검정하는 예를 보인다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 춘계 학술발표회 논문집
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• pp.129-136
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• 2005

The deterministic analysis method has generally used to evaluate the slope stability and it evaluates the slope stability with decision value that is a representative value of design variables. However, one of disadvantages in the deterministic approach is there is not able to consider the uncertainty of soil strength properties, even though it is the biggest influential parameter of the slope stability. On the other hand, the limit state design(LSD) can take a consideration of uncertainties and computes both the reliability index and the probability of failure. LSD method is capable of overcoming the disadvantages of deterministic method and evaluating the slope stability more reliably. In this study, both the mean value and standard deviation of the internal land's representative soil strength properties applied to process the LSD method. The major purpose of this study is to gauge the general applicability of the limit state design in soil slope and to weigh the comparative validity of the proposed partial safety factor. In order to reach the aim of this study, the partial safety factor and resistance factor which totally satisfied the slope's overall safety factor were calculated by the load and resistance safety factor design (LRFD).

• 한국식생활문화학회지
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• 제19권1호
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• pp.83-93
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• 2004

A total of 321 salaried employees were surveyed by a questionnaire to assess consumers perceptions on factors influencing their food choices when they go to a restaurant. The questionnaire consisted of 5 pages and each page contained a same 26 popular food list from various restaurants in JinJu in a column and 5 attributes (e.g. taste, price, fullness, healthiness) in a row. So the respondents were asked to rate a total 25 attributes on the points which the columns and the rows met, using a 5-point scale. The data were analyzed using the SAS program for factor analysis. Five factors which influence consumer's restaurant choice were emerged. They were named as follow: Factor 1:preference and purpose, Factor 2:taste, Factor 3:snack, Factor 4:convenience, Factor 5:concern about obesity. Most of respondents were satisfied with the taste and the healthiness of foods of restaurants in Jin-Ju. The younger and the female groups had more positive attitudes on eating out andi willing to use it frequently. Fullnes, healthiness, and price were important criteria in choice and preference of a restaurant. However, they didn't much consider the food safety. Taking account of the character of Korean food about fullness, healthiness, and resonable price, consumers might prefer Korean food to fast food or foreign food.

• 전기학회논문지P
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• 제59권1호
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• pp.64-70
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• 2010

This paper presents how to decide on tuning factor(${\delta}$) and quality factor(Q) values in design of single-tuned passive harmonic filters. Tuning factor(${\delta}$) and quality factor(Q) values have to consider before decision on circuit parameters of passive filters. A Study on these two value has not been scarcely performed and only experienced values has been used in passive harmonic filter design by far. As a experienced value, in cases of 5th and 7th filter, tuning factor(${\delta}$) is about 0.94 and 0.96 respectively and quality factor(Q) is, in all cases of, 50. If Single-tuned passive harmonic filter will be off-tuned, performance of filter will be decreased steeply and occur to parallel resonance between system reactance and filter capacitance. Therefore During the operation, In order not to off-tuning, Filter must be tuned at former order than actual tuning order. This is the same that total impedance of filter must have a reactive impedance. In this paper, Tuning factor(${\delta}$) is decided via example of real system and using the bode-plot and then performance of filters confirmed by filter current absorbtion rate. And Quality factor(Q) decided using the bode plot in example system and then performance of filters confirmed by filter current absorbtion rate also, which makes a calculated filter parameters to satisfy IEEE-519 distortion limits. Finally, Performance of the designed passive harmonic filter using the tuning factor(${\delta}$) and quality factor(Q) values, decided in this paper is verified by experiment and shows that 5th, 7th, 9th, 11th and 13th current harmonic distortions are decreased within IEEE-519 distortion limits, respectively.

• 대한지리학회지
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• 제28권1호
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• pp.16-39
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• 1993

본 연구는 우리나라 都市內 小規模 工業의 立地決定要因을 규명하기 위한 行態的 硏究의 일환으로, 부산시의 소규모 工業經營者들이 都市內部에 공장임지를 결정함에 있어서 실제로 고려하눈 立地要因이 무엇이며, 또한 그 요인은 기업특성, 경영자특성, 입지장소의 용도지역상 성격에 따라 차이가 있는가를 밝히는 데 목적이 있다. 이를 위해 부산시내 소규모 공업경영자들을 대상으로 설문지에 의한 면접조사를 실시하였다. 그 결과, 소규모 공업의 입지결정에 영향을 미치는 요인이 기업의 특성은 물론 경영자 및 용도지역의 특성에 따라 많은 차이가 있음을 확인하였다. 이는 도시내부의 비공업지역에 소규모 공장이 입지함에 있어서 토지를 비롯한 경제적 요인과 더불어 비경제적 요인이 상당한 영향을 미치고 있음은 입지정책에 시사하는 바가 크다고 볼 수 있다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2003년도 봄 학술발표회 논문집
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• pp.475-480
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• 2003

Traditionally, the statistical methods analyze the relationship between landslide occurrence and related factors(soil depth, soil strength, slope angle, vegetation, etc.) in GIS technique. However, those methods have no mechanical meaning. Therefore, the deterministic model is suggested in this research. The method analyzes the mechanical equilibrium of a potential slide block and then calculates a slope safety factor. Since this method is able to consider the balance of forces applied to the slope and is a more reasonable method for an individual site. In this research, the spatial data is obtained, managed and analyzed using GIS technique. The infinite slope model is used to evaluate factor of safety and analyze the slope stability.