• Journal of Animal Science and Technology
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• 제53권4호
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• pp.283-288
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• 2011

2006년부터 2009년까지 축산물품질평가원에서 등급 판정된 도체성적이 있는 개체와 한국종축개량협회에 등록이 확인된 231,382 두의 자료를 이용하여 각 도체형질의 자료구조 분석 등을 살펴보고, 각 요인별로 도체형질에 어떠한 영향을 주는 지에 대한 환경효과 등을 분석하고, 변수선택법 등을 이용하여 향후 유전능력평가에서 사용 가능한 통계모형 찾아내고자 실시하였다. 한우 암, 수, 거세를 포함한 전체집단에서 출하체중, 도체율, 등 지방두께, 근내지방도에서 정규분포를 보이고 있었고, 다른 형질은 정규분포에 근접함을 확인할 수 있었다. 각 요인에 대한 분산분석에서는 한우 도체형질에 대하여 성별, 출생년도-계절, 도축년도-계절, 출생지역, 도축일령의 모두 고도의 유의성(p<0.01)이 인정되었다. 변수선택법을 이용한 모형적합도 검정에서는 출하체중, 도체중, 도체율, 배최장근단면적은 다섯 가지 환경효과를 선택하는 것이 최적이었고, 등지방두께와 근내지방도는 네 가지 환경효과를 고려하는 것이 최적이었지만, 다형질 분석으로 한 번에 분석을 하기 위해서는 다섯 가지 환경효과를 함께 고려하는 것이 적합하다고 사료된다.

• Steel and Composite Structures
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• 제28권3호
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• pp.363-380
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• 2018

This paper presented an integral design procedure for demountable bolted composite frames with semi-rigid joints. Moment-rotation relationships of beam-to-column joints were predicted with analytical models aiming to provide accurate and reliable analytical solutions. Among this, initial stiffness of beam-to-column joints was derived on the basis of Timoshenko's plate theory, and moment capacity was derived in accordance with Eurocodes. The predictions were validated with relevant test results prior to further applications. Frame analysis was conducted by using Abaqus software with material and geometrical nonlinearity considered. Variable lateral loads incorporating wind actions and earthquake actions in accordance with Australian Standards were adopted to evaluate the flexural behaviour of the composite frames. Strength and serviceability limit state criteria were utilized to verify configurations of designed models. A wide range of frames with the varied number of storeys and bays were thereafter programmed to ascertain bending moment envelopes under various load combinations. The analytical results suggest that the proposed approach is capable of predicting the moment-rotation performance of the semi-rigid joints reasonably well. Outcomes of the frame analysis indicate that the load combination with dead loads and live loads only leads to maximum sagging and hogging moment magnitudes in beams. As for lateral loads, wind actions are more crucial to dominate the design of the demountable composite frames than earthquake actions. No hogging moment reversal is expected in the composite beams given that the frames are designed properly. The proposed analysis procedure is demonstrated to be a simple and efficient method, which can be applied into engineering practice.

• 대한조선학회지
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• 제13권1호
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• pp.17-23
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• 1976

Some methods of analysis of rectangular plates under distributed load of various intensity with interior supports are presented herein. Analysis of many structures such as bottom, side shell, and deck plate of ship hull and flat slab, with or without internal supports, Floor systems of bridges, included crthotropic bridges is a problem of plate with elastic supports or continuous edges. When the four edges of rectangular plate is simply supported, the double Fourier series solution developed by Navier can represent an exact result of this problem. If two opposite edges are simply supported, Levy's method is available to give an "exact" solution. When the loading condition and supporting condition of a plate does not fall into these cases, no simple analytic method seems to be feasible. Analysis of a simply supported rectangular plate under irregularly distributed loads of various intensity with internal supports is carried out by applying Navier solution well as the "Principle of Superposition." Finite difference technique is used to solve plates under irregularly distributed loads of various intensity with internal supports and with various boundary conditions. When finite difference technique is applied to the Lagrange's plate bending equation, any of fourth order derivative term in this equation produces at least five pivotal points leading to some troubles when the resulting linear algebraic equations are to be solved. This problem was solved by reducing the order of the derivatives to two: the fourth order partial differential equation with one dependent variable, namely deflection, is changed to an equivalent pair of second order partial differential equations with two dependent variables. Finite difference technique is then applied to transform these equations to a set of simultaneous linear algebraic equations. Principle of Superposition is then applied to handle the problems caused by concentrated loads and interior supports. This method can be used for the cases of plates under irregularly distributed loads of various intensity with arbitrary conditions such as elastic supports, or continuous edges with or without interior supports, and this method can also be solve the influence values of deflection, moment and etc. at arbitrary position of plates under the live load.

• 한국조경학회지
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• 제22권4호
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• pp.133-148
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• 1995

This study was carried out to provide behavioral data for its planning and management of civic garden through the evaluation of user's motivation & satisfaction. The civic gardens around Seoul were surveyed. The site are located in Kwangtan-myeon, Sudong-myeon, Wonsam-myeon, Nam-myeon, Buknae-myeon, and Jumdong-myeon, A total of 244 questionnaires were completed by mail questionnaires. The results are as follows: 1. 82 percentage of users are in thirties or fourties most of them have children who go to the elementary school. 50 percentage of users are just typical house wifes. 74 percentage of users graduated form university. 60 percentage of users live in lofty apartment buildings. 2. As a result from factor analysis, their motivations are categorized into four fator groups.: 'to experience nature', 'weekend recreation', 'nostalgia', 'to provide their old parent's sparetime'. And their satisfactions are categorized into eleven fator groups.: 'psychological/intellectual component', 'recreational components', 'instruction/management', 'facility'. 'vegetable cultivation', 'social contact', 'crowing', 'aesthetic component', 'family contact', 'the terms of lease', 'visition time'. 3. The user of civic garden can be divided into four user groups by their motivation. CLUSTER1 can represent the user group who have motivations for 'leisure, relaxation'. They are considerably satisfied with all other factor 'opportunity of meeting new person'. CLUSTER2 at the age of 41 to 50 have motivation for 'health, nostalgia'. CLUSTER3 at the age of 31 to 40 have motivation for 'harvest, experiencing nature'. CLUSTER4 at the age of more than 51 want to let their parents enjoy their sparetime. They are dissatisfied with accessibility, amount of cultivation area, crowding and overall farm management. 4. The regression analysis was employed with predicting the overall satisfaction. The results of regression analysis showed that 69% of total variances was explained by six variables: The most effective variable is 'whether visiting on weekend or weekdays', the visitors on weekdays are far more satisfied than weekend visitors because of traffic congestion, and crowding. The second source of satisfactions are 'psychological/intellectual components', they are satisfied with 'family contact', 'the terms of lease' and 'instruction in farming' are sources of satisfaction or dissatisfaction, and finally 'aesthetic landscape' is the source of satisfaction. The second most important variable is psychological one. Even though the civic gardens were not well equipped, they liked the atmosphere of rural life, refreshness, nostalgia, satisfaction from cultivation plants, and sense of achievement.

• 한국전산구조공학회논문집
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• 제27권6호
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• pp.543-549
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• 2014

불확실성을 가지는 콘크리트의 특성으로 인해 철근 콘크리트 부재의 처짐에는 높은 변동성이 발생할 수 있다. 그러나 현행 설계규준은 이를 고려하지 않고 경험적인 데이터에 바탕을 두고 있으며, 부재의 최소 두께 또는 최대 허용 처짐만을 제시하고 있다. 본 논문에서는 철근 콘크리트 플랫 플레이트의 처짐 예측이 가능한 유한요소해석 모델에 확률해석 모델을 적용하여 철근 콘크리트 플랫 플레이트 처짐의 변동성을 평가하고자 하였다. 이를 위해 콘크리트, 철근, 부재치수, 인장강성에 관련된 8개 요소를 변수로 한 몬테카를로 시뮬레이션을 수행하였다. 해석결과, 스팬의 크기가 증가할수록 하중으로 인한 처짐에 더 민감하게 반응하는 것으로 나타났으며, 재하되는 활하중의 크기가 클수록, 슬래브의 두께가 작을수록 처짐의 변동성이 큰 것으로 나타났다.

• 한국의류학회지
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• 제35권11호
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• pp.1333-1345
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• 2011

This study establishes public self-consciousness, sociocultural attitudes toward appearance, and objectified body consciousness as causal variables to identify their direct or indirect effects. This study is an aggregate analysis of existing studies that reveals the relations of how these factors turn to be the image management behaviors. A survey was conducted on 962 women from the ages of 20 to 59 who live in the Daegu and Gyeongbuk areas. The data analysis was performed through programs such as AMOS 16.0 and SPSS 18.0 for Windows. The findings are as follows: first, public self-consciousness had a direct effect on the sociocultural attitudes toward appearance and on objectified body consciousness, whereas it affected image management behaviors directly or indirectly. This means that as women become aware of others' attention, they recognize the social importance of appearance, internalize ideal social standards, and observe and evaluate their own bodies from a third person's viewpoint regarding the standards for a body required by society; in addition, these procedures lead them to manage their image behaviors. Second, the sociocultural attitudes toward appearance had a direct influence on objectified body consciousness; however, they had an indirect effect on image management behaviors. This demonstrates that body consciousness plays a role as a mediator between the sociocultural attitudes toward appearance and the image management behaviors. Third, it appeared that objectified body consciousness directly affected image management behaviors. Objectified body consciousness was identified as a causal variable that exerts immediate influence on image management behaviors where the more objectified body consciousness women objectified themselves as the body standards that created further image management behaviors.

• Journal of Information Technology Applications and Management
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• 제20권1호
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• pp.43-51
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• 2013

Human being does work to live out and they have their private life because human has sociality. Both work and life are important to live out but they are on the trade-off relationship. Because keeping the balance between work and life is too hard, it has been interested by academic and practical areas. Definition of Work-life balance here is that balance or imbalance arising between work and life has no negative impact on their daily life. Above all, Work-life balance is important because it is strongly related to identity. Recently, the introduction of the mobile office system has emerged as a way to solve the problem of work-life balance. It is based on the teleworking which was formerly generated. Teleworking is to perform the work in the employee's home or office space set aside without going into the workplace. Concept of the mobile office system here is not only using portable devices during work for convenience but also the system which is designed for the performance. Thanks to the diffusion of smart devices(smart phone, tablet pc), mobile office system has been spread. Although the importance of mobile office systems is emerging, there are few researches about it. Even they mostly focus on the standpoint of performance of mobile office system. However, Quality of life is as important as the performance. As a part of Quality of Life field, Work-life balance is the closest to employee's quality of life. So this study aims to examine the effect of the use of mobile office systems on work-life balance. To do so, we try to find factors effecting Work-life balance from existing studies and then set a research model. We set the use of mobile office systems as independent variables which are divided by use of function, use by location and use by situation. There are four dependent variables - sense of self command, sense of balance, solving work problem, solving life problem. We collected data from employees who are using mobile office systems on their job. 215 people were participated in the survey and we used multiple regression analysis to verify our research model. Results show that every independent variable has no impact on solving work problem while they have slight impact on the other dependent variables. Especially use on the business trip has significant effect on dependent variables. It means that there is a possibility use of mobile office system could control the employee's quality of life and system should be evolved until it covers even critical tasks. Also, support for mobile office system -education, encouragement-should be provided. By mobile office system is maturing, future research would be done.

• 농촌의학ㆍ지역보건
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• 제32권1호
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• pp.27-39
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• 2007

Objectives: The challenge of an increasing elderly population has coupled with everpresent social concerns in Korea. A major problem in health center for the frail older people is that medical, healthcare, and welfare services are often fragmented in terms of providers and settings without appropriate coordination. The purpose of this study was to investigate the need of health center-based integrated healthcare services and its related factors for the elderly. Methods: A total of 110 elderly people who had visited at a county Health Center were interviewed using a self-administered questionnaire from November to December, 2005. The questionnaire consists of five domains according to the Program of All-inclusive Care for the Elderly. Results: Respondents had high need (total mean score with the 5-point Likert-type sacle: 3.67) of health center-based integrated healthcare services including home visiting service (mean: 4.08), chronic disease care service (mean: 4.06), and transportation service (mean 4.05). According to the results of hierarchical multiple regression analysis, among three regression models the magnititude of the variance of full model that is explained by the need of welfare-domain service was significantly larger than two reduced model. Income was a significant variable in increasing the need of health care and welfare services. Conclusions: This study suggests that the health center-based integrated healthcare services for the elderly must be continuously developed and provided for the health promotion and improved the quality of life of the elderly who live in rural area in Korea.

• 한국위성정보통신학회논문지
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• 제12권4호
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• pp.42-49
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• 2017

지연/분열 허용 네트워크는 간헐적인 통신링크 단절, 높은 전송 에러율와 같은 행성 간 통신에서 마주하는 주된 문제점들을 해결할 주된 기술로 여겨진다. 행성 간 통신에서 종단간 연결성이 보장되지 않아 간헐적으로 통신링크가 단절되면 길고 일정하지 않은 시간 지연과 정보 손실이 발생하고, 따라서 종단간 연결성을 요구하는 인터넷 프로토콜은 행성 간 통신에 적합하지 않다. Store-and-forward 메시지 전송 방식을 따르는 지연/분열 허용 네트워크는 행성 간 통신에서 종단간 연결성이 보장되지 않아 발생하는 문제점을 해결할 수 있다. 본 논문에서는 지구 기지국-지구 위성-달궤도선-달탐사체로 구성된 3-hop 릴레이 우주통신 환경에 지연/분열 허용 네트워크 개념을 적용한 통신 모델을 제시하며, ONE 시뮬레이터를 이용한 실제 우주통신환경 모델링 및 성능 분석을 통해, 안정적인 메시지 전송을 보장하는 최적의 메시지 수명, 버퍼 공간 및 메시지 분할 방법을 제시한다.

• 한국콘텐츠학회논문지
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• 제14권2호
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• pp.506-516
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• 2014

본 연구의 목적은 전문대학생의 성인애착과 자아분화가 대학생활적응에 미치는 영향력을 검증하는 것이다. 이를 위해 부산시에 소재하고 있는 2년제 대학교에 재학 중인 남 여 대학생 271명을 대상으로 성인애착, 자아분화, 대학생활적응 검사를 실시하였다. 성인애착, 자아분화, 대학생활적응의 관계를 알아보기 위해 상관분석을 실시하고, 대학생활적응에 가장 영향력 있는 변인을 밝히기 위해 단계적 중다회귀분석을 실시하였다. 본 연구에서 도출된 연구결과는 다음과 같다. 첫째, 성인애착, 자아분화 및 대학생활적응 간에 유의미한 정적상관을 나타냈다. 둘째 대학생활적응 전체에 영향을 미치는 변인은 애착불안, 애착회피, 정서인지분화, 가족투사과정이며 그 중 애착불안이 상대적으로 가장 많은 영향력을 미치는 것으로 나타났다. 이러한 연구결과는 전문대학생의 건강한 대학생활적응을 위해 학교와 학과 및 대학상담센터에서 다양한 정책적인 개입과 프로그램 개발의 필요성을 시사한다.