• 제목/요약/키워드: environmental variable

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주거환경 스트레스와 주거이동 성향에 관한 연구 (A Study on the Residential Stress and Inclination to Move)

  • 고경필
    • 한국주거학회논문집
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    • 제8권2호
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    • pp.71-84
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    • 1997
  • The Purpose of this study is to estimate how inclination to move can be appeared by understanding the cognition of a resident on stress due to the residential environment. 240 housewives living in Chiniu were Questioned statistical analysis were used with factor analysis, F-test. Duncan's Multiple range analysis, stepwise regression analysis and stepwise discriminant analysis, The result were summarized as follows 1) The stress of residential environment were clissified by six factors indoor facility, educational environmental. indoor structure, air Pollution noise, traffic convenience. 2) The extent of a stress from residential environment was significantly different in the socio-demographic variable and housing-related variable. 3) The stress of residential environment were affected by the direction of house. 4) The variable discriminating inclination to move were the stress of residential environment(air Pollution). an educational level, the type of housing possession, residential Period and the size of house.

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기업간 관계형성의 영향요인이 기업성과에 미치는 영향에 관한 연구 -해운서비스 매매기업을 중심으로- (A Research on Impact of the Inter-Firm Relationship Formation Factors upon Business Performance : Primarily on the Ocean Shipping Service Market)

  • 신희철;신한원;최영로
    • 한국항해항만학회:학술대회논문집
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    • 한국항해항만학회 2004년도 춘계학술대회 논문집
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    • pp.321-332
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    • 2004
  • The purpose of this research is to introduce the concept of "relationship formation factors" in inter-firm relations and to empirically demonstrate that they are effective in improving the relationship results by means of anmediating variable. Therefore, the basic model of this study consists of the independent, mediating, and dependent variables. First, the independent variable, that is, the relationship formation factors, is further classified into three components: transactional, relational, environmental characteristics. Then, the study empirically examines how each of the three components influences the dependent variable, that is, the business performance(Load Factor), by way of the mediating variables, that is, trust and relationship commitment.

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모(母)와 자녀간(子女間) 부정교합(不正咬合)의 유전성(遺傳性)에 관(關)한 연구(硏究) (A STUDY ON THE INHERITANCE OF MALOCCLUSION BETWEEN THE MOTHER AND OFFSPRING)

  • 손태원
    • 대한치과교정학회지
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    • 제14권1호
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    • pp.127-134
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    • 1984
  • The purpose of the present study was to investigate the correlations of malocclusion between the mother and the offspring and thus heritable features from mother to her offspring. Dental impression was taken of the both jaws of 73 mothers and their sons and 109 mothers and their daughters, and the measurement was obtained from the models. The correlation coefficient of the mesio-distal diameters of teeth and that of occlusion and arch variable was calculated from the mesurement. After the data was analyzed and estimated, the following results were obtained : 1. It was evident that the tooth size of the offspring was influenced from their mother. 2. It was evident that the occlusion, the arch size and shape of the offspring were influenced from their mother. 3. There was not the marked difference between the heredity of occlusion variable and arch variable on the mother-offspring relationship. 4. The correlation of the lower intercanine width and the lower available space discrepancy between the mother and the offspring were greatly influenced with the environmental factor.

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공간적 변이성을 고려한 지진파 생성 (Spatially variable ground motion simulation)

  • 박두희;유세프 하샤시;이승찬;이현우;천병식
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 2006년도 춘계 학술발표회 논문집
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    • pp.625-633
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    • 2006
  • Spatial variability of ground motions has significant influence on dynamic response of longitudinal structures such as bridges and tunnels. The coherency function, which quantifies the degree of positive or negative correlation between two ground motions, is often used to describe the spatially variable ground motions. This paper compares two available procedures for developing spatially variable ground time histories from a given coherency function. Hao's method shows serious limitation, resulting in unrealistic decrease in coherency with increase in distance Abrahamason's method, on the other hand, preserves important characteristics of the reference ground motion. Therefore, the Abrahamason's method is recommended to be used in developing spatially varying ground motions.

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시간변수기 의복구매 행동에 미치는 영향에 대한 이론적 연구 (A Theoretical Study on Time Variable Influences in Clothing Purchase Behavior)

  • 임경복;임숙자
    • 한국의류학회지
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    • 제18권3호
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    • pp.355-367
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    • 1994
  • In consumer behavior, money and time have been considered as two important resources as purchase means. Money was treated as an important research variable, but time resource was neglected as an input variable due to lack of well-defined concept and complexity of its nature. Nontheless as industralization and urbanization progress, the importance of time has in- creased. The main objective of this study was to suggest framework of time and time research methodology in clothing and textiles field. This study reviewed both theoretical and empirical research which were performed in diverse research fields. It was suggested that time facotrs, (eg. point, interval, span), should be defined to each decision process as needed, and theoretical frame should be developed accordingly. Time pressure should be included in future for more reliable survey Finally, since clothing can be a personal object, the subjective feeling and environmental factors scold be considered in research.

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고무압을 이용한 가변예압장치 개발을 위한 기초 연구 (A Fundamental Study on the Development of Variable Preload Device Using Rubber Force)

  • 최치혁;김동현;이춘만
    • 한국정밀공학회지
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    • 제28권4호
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    • pp.416-421
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    • 2011
  • Recently there has been increase in need for high precision and high speed machining due to economic and environmental reasons. It is a very important issue that determines the optimal preload that is to be applied to bearings in order to satisfy the performance required in bearings according to its operation conditions. This study introduces a variable preload device that can automatically adjust the preload applied in a machine tool spindle using centrifugal force as opposed in existing rubber instrument. In this study, the deformation of the rubber device by the centrifugal force is analyzed and it is discussed that the proposed device can be worked properly through changes of the collar density.

Large deflections of variable-arc-length beams under uniform self weight: Analytical and experimental

  • Pulngern, Tawich;Halling, Marvin W.;Chucheepsakul, Somchai
    • Structural Engineering and Mechanics
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    • 제19권4호
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    • pp.413-423
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    • 2005
  • This paper presents the solution of large static deflection due to uniformly distributed self weight and the critical or maximum applied uniform loading that a simply supported beam with variable-arc-length can resist. Two analytical approaches are presented and validated experimentally. The first approach is a finite-element discretization of the span length based on the variational formulation, which gives the solution of large static sag deflections for the stable equilibrium case. The second approach is the shooting method based on an elastica theory formulation. This method gives the results of the stable and unstable equilibrium configurations, and the critical uniform loading. Experimental studies were conducted to complement the analytical results for the stable equilibrium case. The measured large static configurations are found to be in good agreement with the two analytical approaches, and the critical uniform self weight obtained experimentally also shows good correlation with the shooting method.

원가기반 제한경쟁과 비용왜곡 요인 -변동비 반영 전력시장에서의 실제변동비 반영사례를 중심으로- (Limited Cost-Based Competition and the Cost Distortion Factor - How Real Variable Costs are Reported in Cost-Base Pool of Korean Power Market -)

  • 김명석;조성봉
    • 자원ㆍ환경경제연구
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    • 제23권3호
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    • pp.497-513
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    • 2014
  • 비용을 보상하는 원가규제 방식으로 알려진 투자보수율 규제 또는 총괄원가주의 규제의 경우 피규제자는 비용을 부풀리려는 유인을 갖게 마련이다. 그런데 생산공장별 원가를 규제자가 파악하고 이들 간의 경쟁을 유도하는 경우에는 단기적으로 '수인의 딜레마' 상황이 나타나 원가 과대보고와는 방향이 다른 원가 과소보고 방향으로의 비용왜곡 요인이 발생할 수 있다. 변동비 반영 전력시장의 경우 발전기의 운전시간이 늘어날수록 실제변동비와 등록변동비 간의 차이는 점점 커지게 되지만 복합화력 발전사들은 가동률과 발전량을 높게 유지하기 위해 등록변동비를 유지시키려는 전략적 선택을 할 수 있다. 그 결과 궁극적으로 수익성이 악화되고 신규설비에 대한 투자를 유도하지 못하며 설비예비율은 적정 이하로 떨어지는 '수인의 딜레마' 상황이 나타날 수 있다. 이에 따라 발전사들의 자기변동비가 실제 효율과 유사하도록 관련 규정을 개정할 필요가 있다.

연약지반에 적용된 변단면 연약지반보강기초의 거동분석 (Behavior of Variable Cross-Section Soft Ground Reinforced Foundation in Soft Grounds)

  • 김기웅;김동욱;조명수
    • 한국지반신소재학회논문집
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    • 제15권4호
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    • pp.89-96
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    • 2016
  • 인천 ${\bigcirc}{\bigcirc}$지역의 연약지반에 시공된 변단면 연약지반보강기초(Variable cross-section soft ground reinforced foundation)의 연직압축거동을 분석하였다. 변단면 연약지반보강기초는 원지반과 고화재를 혼합교반하여 형성되는 고형체의 높은 강성과 강도를 이용하여 상부구조물로부터 유발되는 연약하중을 효과적으로 저항하기 위하여 시공된다. 변단면 연약지반보강기초는 군말뚝 형식으로 시공이 되는데, 정확한 연직거동을 알기 위하여 1개소의 기초에 대한 연직재하시험을 수행하였다. 변단면 연약지반보강기초의 거동을 일반적인 깊은 기초의 거동과 비교하기 위하여 유사한 천층지반조건에 시공된 PHC 파일의 재하시험 결과와 비교하여 재하하중에 따른 침하량 및 하중전이 거동특성을 분석하였다. 연직재하시험결과를 비교분석하였다. 변단면 연약지반보강기초는 제한된 범위의 연직하중에 대하여 천층에서도 효율적으로 저항하는 것으로 분석되었다.

스스로 알아보는 안내해설판의 교육적 효과

  • 김성일;황명현
    • 한국환경교육학회지:환경교육
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    • 제10권2호
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    • pp.213-228
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    • 1997
  • This study was planned to test the educational effects of self-guiding environmental interpretation panel. For purpose of the study, self-guiding interpretation panel was set up along the trail of green shower area of Kwang-Reung Arboretum in 1995,and the environmental behavior related variables such as attitude, locus of control, personal responsibility, general knowledge, and intention to act were closen based on Hines and his colleagues' Responsible Environmental Behavior model(1987). The pre-test/post-test non-random control group design was introduced fo test the effects of panel. ANCOVA was used to test the differences between experimental and control group because of the need to consider the effects of other variable such as socio-economic variables on the changes of environmental behavior related variables. Among 5 environmental behavior related variables, the changes of attitude and knowledge were significantly different between experimental group and control group, and the experimental group's direction of change was more favorable for environment. It is concluded that the educational effects of self-guiding interpretation panel were partially accepted. Several recommendations and restrictions of the study are presented.

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