• Structural Engineering and Mechanics
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• 제68권2호
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• pp.159-170
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• 2018

This paper aims to develop response modification factors for stiffness degrading structures by incorporating soil-structure interaction effects. A comprehensive parametric study is conducted to investigate the effects of key SSI parameters, natural period of vibration, ductility demand and hysteretic behavior on the response modification factor of soil-structure systems. The nonlinear dynamic response of 6300 soil-structure systems are studied under two ensembles of accelograms including 20 recorded and 7 synthetic ground motions. It is concluded that neglecting the stiffness degradation of structures can results in up to 22% underestimation of inelastic strength demands in soil-structure systems, leading to an unexpected high level of ductility demand in the structures located on soft soil. Nonlinear regression analyses are then performed to derive a simplified expression for estimating ductility-dependent response modification factors for stiffness degrading soil-structure systems. The adequacy of the proposed expression is investigated through sensitivity analyses on nonlinear soil-structure systems under seven synthetic spectrum compatible earthquake ground motions. A good agreement is observed between the results of the predicted and the target ductility demands, demonstrating the adequacy of the expression proposed in this study to estimate the inelastic demands of SSI systems with stiffness degrading structures. It is observed that the maximum differences between the target and average target ductility demands was 15%, which is considered acceptable for practical design purposes.

• 한국산학기술학회논문지
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• 제3권4호
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• pp.240-244
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• 2002

영어문장의 논항변이는 오랫동안 언어학자들의 주목을 받아온 재미있는 현상이다. 대표적으로 인용되는 예문은 “load hay onto the truck" 과 “load the truck with hay" 간의 의미차이 그리고 “The garden swarms with bees" 또는 “Bees are swarming in the garden" 과 “The garden swarms with bees" 의 의미차이이다. 이 문장들은 언어학이론상 설명하기 곤란한 의미차이를 가져오게 된다. 통사적인 논항의 재배치는 미묘하지만 엄연한 동사의 의미차이를 보인다. 이를 학자에 따라 “Double-faced" 또는 “Verbal diathesis"라고도 하는데, 본고에서는 Dowty(200l)의 견해를 따르며, 관련있는 학자들의 견해를 반영한다. 나아가 “Argument alternation" 의 행위자 주어 (A-subject)와 위치주어 (L-subject) 형 문장을 중심으로 문장을 분석하고 상이한 특질을 기술하여 Dowty(2001)식 분석의 이론적 타당성을 확인하게 된다.

• 가족자원경영과 정책
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• 제2권2호
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• pp.53-65
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• 1998

This study was designed to examine the decision-making and family life satisfaction of the urban middle-aged housewives from the ecological perspective. The main purpose of this study was to investigate the effects of ecological enviornment variables(ie, natural physical-biological environment·social-cultural environment·human-built environment) and their dicision-making on their family life satisfaction. Also, it is to provide some fundamental information that helps to elevate the family life satisfaction of the unban middle-aged housewives. The subjects of this study were 305 housewives living in Seoul and Inchon area, whose age was from 40 to 59. The significant results were as follows: 1) Their decision-making was affected by the following variables in the order of health condition, fate-control orientation, husband’s support, monthly family income and the perception of the adequacy of household income. 2) The ecological environment variables which had an influence on family life satisfaction were the perception of the adequacy of household income, husband’s support, fate-control orientation, health condition and educational level. 3) From the regression analysis, the model was found to be highly significant, accounting for 44% of the variance. Thus, husband’s support was the strongest predictor variable.

• 한국식품조리과학회지
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• 제7권4호
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• pp.111-118
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• 1991

The purpose of this study was to evaluate nutritional adequacy and microbiological quality of foods served in day-care centers, and to provide basic information and guidelines for the development of computerized standardized recipes and microbiological quality control program. Assessment was conducted for four day-care certers selected from each of the four groups categorized in the basic survey. Nutritional balance and amount of consumption of the food was calculated and microbiological analysis was conducted. The results of the study showed the followings: the nutritional assessment of food served in day-care centers indicated that energy and nutrients contents of foods were below the recommended level (RDA/3), except the case of a university day-care center; the percentage of leftovers for soups and vegetables was high, but that for a la carte was low; fecal coliform was not found in any of samples, however, the number of coliform in the salted Korean radish and salad was higher than guideline for microbial acceptability; the number of coliform checked from the surface of the cutting board was higher than acceptable level in most day-care centers.

• 대한지역사회영양학회지
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• 제5권3호
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• pp.475-483
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• 2000

The develop a simple screening test for identifying Korean elderly at risk of undernutrition, the data of the health-related habits, dietary behaviors and nutrient intakes of the elderly in Chongju were analyzed. Two risk indicators, mean adequacy ratio (MAR) and the respondents perceived health, were used to detect the undernutrition risk of the elderly. In order to select a list of questions for the test, factors a affecting nutritional status and items investigated in previous nutrition surveys of the elderly were considered, and 21 questions were primarily selected. A multiple regression and stepwise regression analysis were used to take out the weak predictors of poor nutrient intake, and to give item weights to the strong predictors, and a list of 17 questions was finally adopted. To determine the cut-point of the test score, sensitivity, and positive predictive values were calculated. The Simple Screening Test developed in this study is a brief, easily scored tool to predict poor nutrient intake and the perceived health status of the elderly. The test may provide a basis of further comprehensive nutritional assessment or intervention planning, if necessary, for those who are diagnosed ad "high risk". The test, however, needs to be independently validated by other groups of individuals.dividuals.

• 대한디지털의료영상학회논문지
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• 제13권2호
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• pp.77-81
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• 2011

Due to the increasing quantity of health services demand a wide range of growing medical markets and hospital through advanced, diversification can meet the needs of the patient. This hospital is having the introduction of expensive medical equipment. Because of this, hospitals are struggling to operate the hospital management. Therefore, when operating at the hospital before and after introduction of the most important factor in the interests of medical equipment through the analysis is directly related to hospital operations. CT study of the local clinics, or CR 40 where members of the medical equipment with 54 points against selected practitioners and hospital visits and interviews to investigate the expected benefits of each of the members raised an average of seven months to identify revenue performance caused by interests. Raised against the expected benefits resulting benefits to the overall average 87.43% did not meet the expected benefits. The hospital plans to introduce future when reviewing the medical equipment in consideration of the characteristics of the equipment requires a more solid plan, and whether the plan is properly implemented will be needed for the institutional verification capabilities.

• 유통과학연구
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• 제13권12호
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• pp.23-31
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• 2015

Purpose - The purpose of this study is to determine consumers' awareness of hygiene and the perceived risks in the service areas of coffee shops and diners, or simply coffee shops. Research design, data, and methodology - A literature review was conducted on related publications, essays, and periodicals to find correlations among the variables. We developed a research model and hypothesis, and conducted empirical research for statistical data analysis. Results - The results satisfied adequacy standards, with GFI=0.926, AGFI=0.901, RMR=0.020, NFI=0.941, X²=403.197, and p-value=0.120. The results also displayed satisfied adequacy standards for the moderating effects of shop types, with GFI=0.998 (≥0.9 desirable), AGFI=0.998 (≥0.9 desirable), RMR=0.004 (≤0.05 desirable), NFI=0.999 (≥0.9 desirable), X²=1.572, and p-value=0.814 (≥0.05 desirable). Conclusions - A higher consumer hygienic awareness results in a better brand image. Moreover, greater perceived risk results in a worse brand image. Perceived risk is a vital determinant of brand image and it deeply influences customers' decisions to visit. Therefore, perceived risk is a vital determinant of forming a brand image and must be incorporated when devising strategies.

• 전기학회논문지
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• 제64권11호
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• pp.1535-1542
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• 2015

An increasing number of electric vehicles (EVs) in power system affects its reliability in various aspects. Especially under high EV penetration level, new generating units are required to satisfy system's adequacy criterion. Wind power generation is expected to take the major portion of the new units due to environmental and economic issues. In this paper, the system reliability is analyzed using Loss of Load Expectation (LOLE) and Expected Energy Not Served (EENS) under each and both cases of increasing wind power generation and EVs. A probabilistic multi-state modeling method of wind turbine generator under various power output for adequate reliability evaluation is presented as well. EVs are modeled as loads under charging algorithm with Time-Of-Use (TOU) rates in order to incorporate EVs into hour-to-hour yearly load curve. With the expected load curve, the impact of EVs on the system adequacy is analyzed. Simulations show the reliability evaluation of increasing wind power capacity and number of EVs. With this method, system operator becomes capable of measuring appropriate wind power capacity to meet system reliability standard.

• 대한지역사회영양학회지
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• 제4권1호
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• pp.74-82
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• 1999

This study evaluated the quality of meals served by the elementary schools in Muan based on nutrient contents and food diversity. The contents, nutrient densities and nutrient adequacy ratios(NAR) of most nutrients were higher than those calculated from the Korean RDA. However, the content, nutrient density, and NAR of iron were lower than those calculated from the RDA for 10 to 12 year old girls. The content of sodium was somewhat high. The average number of different kinds of food and dishes per meal were 19.2 and 6.0, respectively. The more the number of dishes, the higher the NARs of calcium, calories, niacin, phosphorus and protein. However, the NAR of iron showed no correlation with the number of dishes. The meals belonging to the food group intake pattern containing fruits had more vitamin C and fiber, and less protein, lipid, and phosphorus than those belonging to the food group intake pattern not containing fruits. In conclusion, the quality of nutrition of meals served by school lunch program(SLP) was considered fairly good. However, the nutritionists should consider the iron for 10 to 12 year old girls and cut down the amount of sodium. In addition, unless the children prefer the foods served by SLP or adjust to the general aspects of SLP, SLP can't accomplish its purposes. Therefore, we suggest that nutritionists should survey children's food preference and satisfaction with the general aspects of SLP.

• Journal of Nutrition and Health
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• 제36권10호
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• pp.1061-1070
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• 2003

The purpose of this study was to investigate differences in the diet with the amount and the qualitative assessment of nutrient intakes by the economic level. Data from the 1998 Korean Health and Nutrition Survey were used. Using the poverty line based on the 1998 Korean minimum cost of living, Subjects (n = 10400) were classified into high class (36.1％), middle class (40.7％) and low class (23.1％). Chi-square-test and Analysis of Variance following Duncan's multiple range test were used to test the difference in nutrient intake pattern among three groups ($\alpha$ = 0.05). The amount of nutrient intake and nutrient intake adequacy were statistically different by the economic level (p<0.01). The ratio of energy intake from carbohydrate is higher than the criteria of WHO recommendation in all economic levels. Especially people in the low class depended much on the carbohydrate for the energy intake. The ratio of energy from the protein and fat are lower in the middle and low class than that of the high class. The Intake level of calcium and vitamin B$_2$ were lower than those of the Recommended Dietary intake level, regardless of economic status. It also showed differences in major food sources of nutrients by the economic level Consequently, it seems that the nutrition policy and program should be prepared according to their economic status. Also, there should more detailed studies to find out the nutrient intake pattern, their determinant, and health consequences.