• Korean Journal of Hydrosciences
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• 제1권
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• pp.61-71
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• 1990

The characteristics of radial thickness of ice jam at the center part of channel bends were analyzed briefly in this paper. Jam thickness in channel bends increases both toward the inner bank, and dowmstream. For this study, slope at the jam's underside was assumed to be liner with similarity of radial slope of bed in alluvial bends. Radial slope at the jam's underside in floating ice elements was estimated using the force equilibrium theory in the radial direction. The eqution which can be estimated the radial slope of ice jam was suggested using Falcon and Kennedy's bed layer theory. Experimental data, which were measured at the center part of cross-section in a single 180-degree bend, were compared to the calculated values using the suggested equtions. The result shows that the calcultated values were smaller than the measured ones. Ot is considered that the estimated value of shear stress in the radial direction may be smaller than the actual and two-layer model may be not suibable for alluvial bend flow.

• Structural Engineering and Mechanics
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• 제49권5호
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• pp.619-629
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• 2014

As hyperboloidal cooling towers (HCTs) growing larger and slender, they become more sensitive to gust wind. To improve the dynamic properties of HCTs and to improve the wind resistance capability, stiffening rings have been studied and applied. Although there have been some findings, the influence mechanism of stiffening rings on the dynamic properties is still not fully understood. Based on some fundamental perceptions on the dynamic properties of HCTs and free ring structures, a concept named "participation degree" of stiffening rings was proposed and the influence mechanism on the dynamic properties was illustrated. The "participation degree" is determined by the modal deform amplitude and latitude wave number of stiffening rings. Larger modal deform amplitude and more latitude waves can both result in higher participation degree and more improvement to eigenfrequencies. Also, this concept can explain and associate the pre-existing independent findings.

• 서비스연구
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• 제8권3호
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• pp.37-49
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• 2018

본 연구는 21세기를 선도할 학문인 서비스학을 학위과정 프로그램으로 설계하기 위한 탐색적 연구를 수행하였다. 새 시대는 산업간 융합이 가속화되고 직업의 이동성이 크게 증가하는 시대이므로, 고등교육에서 양성해야하는 인재상도 크게 달라지게 된다. 역량 개발을 통해 자신의 직업을 창조할 수 있는 인재를 양성해야하며, 산업간 경계가 해체된 생태계에서 창조적 주도성을 발휘할 수 있는 인재를 양성해야 한다. 이를 위해서는 기존의 수직적 전공 학과체제에서 수평적 연계전공 체제로의 전환이 요구되며, 서비스학은 이러한 전환을 위한 핵심 프로그램으로서 역할이 기대된다. 본 연구에서는 이러한 신경제사회의 변화를 반영하고 신교육수요를 반영하여 서비스학 학위 프로그램을 설계하였다. 서비스학 프로그램은 독립전공으로서 학위를 수여할 수도 있고, 기존 전공들과의 연계전공으로서 또는 부전공으로서 역할을 수행할 수도 있으므로, 이에 대한 분석을 제시하였다. 서비스학은 세계경제포럼에서 21세기 인재상으로 정의한 역량을 가장 효과적으로 배양하는 학문으로서 역할이 기대되므로, 향후 연구에서 교육 내용과 방법론에 대한 심화 연구가 필요하다.

• Earthquakes and Structures
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• 제18권2호
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• pp.263-273
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• 2020

The use of energy concepts in seismic analysis and design of structures requires the understanding of the input energy response of multi-degree-of-freedom (MDOF) systems subjected to strong ground motions. For design purposes and non-time consuming analysis, however, it would be beneficial to associate the input energy response of MDOF systems with those of single-degree-of-freedom (SDOF) systems. In this paper, the theoretical formulation of energy input to MDOF systems is developed on the basis that only a particular portion of the total mass distributed among floor levels is effective in the nth-mode response. The input energy response histories of several reinforced concrete frames subjected to a set of eleven horizontal acceleration histories selected from actual recorded events and scaled in time domain are obtained. The contribution of the fundamental mode to the total input energy response of MDOF frames is demonstrated both graphically and numerically. The input energy of the fundamental mode is found to be a good indicator of the total energy input to two-dimensional regular MDOF structures. The numerical results computed by the proposed formulation are verified with relative input energy time histories directly computed from linear time history analysis. Finally, the elastic input energies are compared with those computed from time history analysis of nonlinear MDOF systems.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2001년도 학술발표회 논문집(I)
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• pp.67-75
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• 2001

Anticipated water scarcity in the first half of this century is one of the most concerned international issues. However, even though the issue has an international impact and world wide monitoring is critical, there are limited number of global estimates at present. In this study, annual water availability was derived from annual runoff estimated by land surface models using Total Runoff Integrating Pathways (TRIP) with 0.5 degree by 0.5 degree longitude/latitude resolution globally. Global distribution of water withdrawal for each sector in the same horizontal spatial resolution was estimated based on country-base statistics of municipal water use, industrial water use, and agricultural intake, using global geographical information system with global distributions of population and irrigated crop land area. The total population under water stress estimated for 1995 corresponded very well with former estimates, however, the number is highly depend on how to assume the ratio how much water from outside of the region can be used for water resources within the region. It suggests the importance of regional studies evaluating the possibility of water intake as well as the validity of the investment for water resources withdrawal facilities.

• 보건의료산업학회지
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• 제5권4호
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• pp.113-126
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• 2011

The purposes of this study were to investigate nursing students' Knowledge, attitudes and behavior toward the elderly and to identify the predictors of nursing student's knowledge, attitudes and behavior toward the elderly. The data were collected from 513 nursing students enrolled in ADN(Associate Degree in Nursing) program in Daegu by using structured questionnaire. The research producted following results: 1) The average score of the participants' knowledge of the elderly was $12.3{\pm}2.7$ out of 25. The average attitude score was $86{\pm}11.7$ out of 140. This score was classified as a neural range. The average behavior score was $57.5{\pm}6.9$ out of 68. 2) Among general characteristic of the participants level of knowledge was statistically significant for age, religion, educational level. 3) Participants' knowledge toward the elderly was difference significantly present not living conditions, the degree of preference for offering the nursing care of the elderly. 4) Participants' attitude toward the elderly were statistically the significant difference in the degree of the familiar interaction with the elderly, the interest in the elderly and problems of the aged. 5) Participants' behavior toward the elderly were statistically the significant difference in the degree of a current relationship with the elderly, the familiar interaction with the elderly. 6) The correlation, coefficients of participants' knowledge, attitude and behavior toward the elderly were positively correlated. In conclusion, It is necessary to develop a program for continuous teaching and education that will help increase student nurse's knowledge of the elderly and thereby positively change attitude and behavior toward the elderly.

• 복식
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• 제52권2호
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• pp.1-17
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• 2002

The Traditional Look, a class of fashion, represents image based on British aristocratic authenticity and cultural heritage as unchangeable and lasting classic fashion style. And recently, it keeps up with the trend of modern and young consumers' desire by putting various images. The purpose of the study is to investigate the concept, image and present market condition and to analyze degree of consumers' brand awareness of Traditional brand in pursuit of developing new market and ensuring power between competitive brands. From above work, surveyed on degree of brand awareness and interest, preference, associable image and purchase factors coming from consumers. 606 data were analyzed with SPSS package. Frequency, Factor analysis, one-way ANOVA, Multiple response, and correlation were applied. The results of this study were as follows. 1. Traditional brand has a high degree at consumers' brand awareness but comparatively lower at interest in it. In band name, while the Burberry has the highest brand awareness, the Polo and the Hunt take first and second position in a purchasing rate. Brand preference has tendency to be concentrated on certain brands showing the outstanding highest degree like the Polo in the 20s, and the Burberry in the 50s in aspect of age structure. 2. In associable image of Traditional brand, it is associate with noble image as dignified, classical and intellectual with itself strongly among practical, individuality, confidential and noble image. 3. As the purchase factors of traditional brand products, it depends on mainly the reliability and esthetic factors like design and quality rather than ostentatious and practical factors. 4. Associable image except individuality image is correlated with the purchase factors of traditional brand.

• 대한인간공학회지
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• 제26권4호
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• pp.135-142
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• 2007

Icon conveys symbolic information which they have become ubiquitous as main element of GUI. However, users often cannot intuitively understand its functional meanings. Icon has to be designed for users to easily understand functional meanings. In order to evaluate icon, the spreading activation model can be used to effectively understand the process of information retrieval. In asymmetric spreading activation model is that in the two nodes the degree of spreading activation is different according to direction. Thus, asymmetric spreading activation theory was performed evaluating the strength of association when users see visual image to associate their verbal meaning (visual image - verbal meaning pair) and users see verbal meaning to associate their visual image (verbal meaning - visual image pair). According to the direction, this study hypothesizes that the well-designed icons have symmetric relationship rather than asymmetric relationship between the two pairs. The strength of association is measured through the reaction time and the accuracy rate. In performing SAT (spreading activation test), the ten icons were selected as word processing software icons. After first SAT, newly designed icons were developed based on Korean mental model, and second SAT was conducted using them. The results showed that the accuracy rate of newly designed icon has been improved. Also there is significant difference of reaction time between current icons and newly designed icons. Well-designed icon is confirmed that the strength of association relationship arises symmetrically rather than asymmetrically between the two pairs. User centered icons could be designed by improving the strength of association between the two pairs. Asymmetric SAT evaluates the strength of the association between the visual image and the verbal meanings to contribute to the development of icon which it related to human's association structure.

• 대한치과보철학회지
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• 제34권1호
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• pp.85-99
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• 1996

Finite element models were constructed to analyze the mechanical behavior of a three unit fixed partial denture (FPD) with a 2nd premolar and 2nd molar abutment either employing a rigid and nonrigid connector. Gap elements were used to model the clearance space of the nonrigid connector. 1. High stress was generated in the FPD and supporting abutment around the rigid connector. 2. The pattern of stress and deflection is very similar between vertically and 20 degree mesially tilted nonrigid connector at the distal aspect of premolar abutment. 3. FPD with an inverted nonrigid connectors exhibited the worst undesirable mechanical stress states and deformations. 4. Nonrigid connector of normal orientation transmit the load to the abutment tooth, but inverted connector doesn't transmit the force.

• 대한간호학회지
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• 제32권4호
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• pp.435-446
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• 2002

Purpose : The purpose of the study were to describe outcomes of CHP activities, and to evaluate the economic validity of CHP through a cost-benefit analysis. Method : The sample size was 272. Data were collected using a researcher developed questionnaire from November 1999 to March, 2000. Result : The mean age of CHPs was 39.6 (SD-36). In regard to marital status, 90.8% of the respondents were married. 72% of the CHPs had associate degree. Among CHP activities, providing medical services was 50%, followed by home care visits 20% and health promotion services 20%, preventive services 10%. Total costs per month incurred to CHP activities was \3,053,437($2,442.7). Total benefits per month was \6,711,525($5,369.2). Hence, net benefit was calculated as \3,658,089($2,926). Conclusion : Cost-benefit ratio was 2.20, which provides the evidence of the economic viability of CHP program. The result of cost-benefit analysis, however, would more strongly support the economic value of CHP if intangible benefits of CHP activities such as decreases in pain and suffering and increased quality of life, could be counted.