• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2005년도 한국우주과학회보 제14권1호
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• pp.129-132
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• 2005

본 논문에서는 HAUSAT-2의 궤도 열 해석과 열 제어계의 예비설계를 살펴본다. HAUSAT-2의 열 제어계를 설계하기 위해서 우선 열 제어의 기본 이론 및 열 평형 방정식을 바탕으로 능동 및 수동의 각종 열 제어 방법을 고려하여 HAUSAT-2에 적합한 열 제어 방법 및 재질을 선정하였다(Karam 1998). 또한, 예상궤도인 고도 650km, 경사각 $98^{\circ}$의 태양동기궤도에서 HAUSAT-2가 처해지는 열 환경에 대한 분석 및 위성체의 각 면에 가해지는 은도 분포 및 범위를 예측하여 이를 바탕으로 열 제어계를 설계하였다. 열 해석은 기본적으로 시스템레벨의 해석, 부품레벨의 해석, 보드레벨의 해석 차순으로 진행되었으며, 현재 HAUSAT-2의 열 해석은 발열이 비교적 많은 보드의 해석까지 진행된 상태이며, 이러한 열 해석을 통해서 얻은 결과는 요구조건을 만족하지 못하는 부분에 대해 설계 변경 등을 통해서 모든 부품이 허용온도 범위를 유지하도록 HAUSAT-2의 열 제어계를 설계하였다. 향후 구조-열 모델(STM; Structure & Thermal Model)을 제작한 후 열 진공시험을 통해 열 해석 결과에 대한 검증을 수행할 것이다.

• Nutrition Research and Practice
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• 제8권3호
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• pp.312-318
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• 2014

BACKGROUND/OBJECTIVES: Due to recent changes in social structure, single-person households are on the rise worldwide and therefore the interest in the quality of life of singles is increasing, but the research on the relationships related to their diet-related quality of life is scarce. This research analyzes the structural relations in the effect of convenience food satisfaction and quality of life according to dietary style of Korean, Japanese and Chinese singles. SUBJECTS/METHODS: The targets of this study were Korean, Japanese, and Chinese singles, identified as adults between the ages of 25 and 54, having economic capabilities or working and living alone, either legally or in actuality having no partner. A statistical analysis was conducted using SPSS12.0 for Windows and SEM using AMOS 5.0 statistics package. The reliability of these findings was supported by a Cronbach's alpha coefficient of 0.6 and higher for all the factors. In an attempt to study the level of satisfaction with convenience food in accordance to dietary style and the quality of life of singles, a structural equation model was constructed and analyzed. RESULTS: Of the three countries, regarding the effect of dietary style on singles' quality of life, the convenience-oriented style was found to have a negative effect on Korean singles' overall quality of life, but a positive effect on Japanese singles' overall quality of life, and a negative effect on Chinese singles' positive psychological aspect of quality of life. In addition, although Chinese singles have a high level of interest in health, they have an overall high level of satisfaction regarding fast food and its nutritional value. CONCLUSIONS: The number of singles in Korea, Japan, and China has been consistently increasing in recent years, and there is a need for continuous interest in their healthy dietary lifestyles in terms of convenience, economy, and taste.

• 유통과학연구
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• 제16권10호
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• pp.39-46
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• 2018

Purpose - this research is to examine the relationship between Franchise's experiential value, lovemarks, respectful recognition, and brand loyalty focusing on the control variables. Control variables such as age, occupation, education, monthly income, and kinds of restaurant are included to measure influence on these as well. Research, design, data, and methodology - 500 questionnaires were distributed from June 10th to July 10th, 2017. 225 respondents were totally included in this analysis using SPSS and AMOS program. In order to test hypothesis, factor analysis and reliability verification firstly were employed, and then covariance structure analysis was used. Results - Empirical results are as followed. First, it can be mentioned that the esthetics of dessert cafe is analyzed to have a positive effect on the perception of love and respectful perception. Second, playfulness has a positive effect on perception of love. Third, respect perception has a positive effect on brand loyalty. When variables such as age, occupation, education, monthly income, and restaurant type were used as control variables, only monthly income had a significant effect on respect recognition. This shows that the control variable has a significant effect on the causal relationship of the variables. Conclusions - In summary, it can be stated that it is necessary for marketers to establish marketing strategies in order to boost customers' experiential value such as esthetics of franchise and also to strengthen lovemarks for respectful recognition and brand loyalty.

• 디지털융복합연구
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• 제15권6호
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• pp.97-105
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• 2017

본 연구에서는 교수의 핵심역량과 대학생의 인지역량 및 생애역량의 구조적 분석을 위해 전국 7개 대학의 대학생 500명을 대상으로 빈도분석, 기술통계분석, 신뢰도 분석, 상관분석과 확인적 요인분석, 구조방정식모형 분석을 실시하였다. 연구결과, 교수의 핵심역량은 대학생의 생애역량에 유의한 영향을 미치는 것을 알 수 있었으며, 교수의 핵심역량은 대학생의 인지역량에 유의한 영향을 미치는 것을 알 수 있었다. 또한 대학생의 인지역량은 생애역량에 유의한 영향을 미치는 것을 알 수 있었으며, 대학생의 인지역량은 교수의 핵심역량과 대학생의 생애역량 사이에서 유의한 매개효과가 있음을 확인할 수 있었다. 이는 교수의 핵심역량이 대학생의 인지역량을 기반으로 생애역량에 더 많은 영향을 준다고 할 수 있다.

• 서비스연구
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• 제7권3호
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• pp.1-19
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• 2017

본 연구는 축제의 이미지, 도시브랜드자산, 지역 애호도 간의 영향관계를 규명하기 위하여 진행되었다. 연구를 위하여 2015년 안동 국제탈춤 페스티벌 참석자들을 대상으로 설문을 실시하였으며, 수거한 총 289부의 설문 조사 결과를 바탕으로 빈도분석, 요인분석, 다중회귀분석, 기술통계분석, 상관관계분석, 구조방정식모형분석을 실시하였다. 연구 결과, 축제 이미지는 도시브랜드자산에 유의한 영향을 미쳤으며, 도시브랜드자산은 지역 애호도에 유의한 영향을 미쳤다. 그러나 축제 이미지가 지역 애호도에 직접적인 영향을 미치지는 않는 것으로 나타났다. 본 연구는 향후 축제 이미지와 도시브랜드 관련 연구 확장에 기여할 것으로 기대되며, 지역축제를 진행하는데 있어 실무적 시사점을 제공할 수 있을 것으로 기대된다.

• Steel and Composite Structures
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• 제8권1호
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• pp.1-18
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• 2008

Observations from experiments and real fire indicate that restrained steel beams have better fire-resistant capability than isolated beams. Due to the effects of restraints, a steel beam in fire condition can undergo very large deflections and the run away damage may be avoided. In addition, axial forces will be induced with temperature increasing and play an important role on the behaviour of the restrained beam. The factors influencing the behavior of a restrained beam subjected to fire include the stiffness of axial and rotational restraints, the load type on the beam and the distribution of temperature in the cross-section of the beam, etc. In this paper, a simplified model is proposed to analyze the performance of restrained steel beams in fire condition. Based on an assumption of the deflection curve of the beam, the axial force, together with the strain and stress distributions in the beam, can be determined. By integrating the stress, the combined moment and force in the cross-section of the beam can be obtained. Then, through substituting the moment and axial force into the equilibrium equation, the behavior of the restrained beam in fire condition can be worked out. Furthermore, for the safety evaluation and repair after a fire, the behaviour of restrained beams during cooling should be understood. For a restrained beam experiencing very high temperatures, the strength of the steel will recover when temperature decreases, but the contraction force, which is produced by thermal contraction, will aggravate the tensile stresses in the beam. In this paper, the behaviour of the restrained beam in cooling phase is analyzed, and the effect of the contraction force is discussed.

• 한국응용과학기술학회지
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• 제37권5호
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• pp.1067-1077
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• 2020

본 연구의 목적은 골프전공 대학생의 학업적 자기효능감과 학습몰입 및 자기주도학습의 관계를 조사하는데 있다. 본 연구는 골프전공 대학 수업에 참여한 257명의 학생들로 구성되었으며, 270명의 학생들의 데이터를 분석하였다. SPSS 21.0 및 AMOS 22.0의 프로그램을 이용하여 구조방정식 모델을 분석하였다. 그 결과는 다음과 같다. 첫째, 골프전공 대학생의 학업적 자기효능감은 학습몰입에 긍정적인 영향을 주었다. 둘째, 골프전공 대학생들의 학습몰입은 자기주도학습에 긍정적인 영향을 주었다. 셋째, 골프전공 대학생의 학업적 자기효능감은 자기주도학습에 긍정적인 영향을 주었다.

• 산경연구논집
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• 제11권3호
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• pp.51-62
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• 2020

Purpose - This study examined the relationship between individual creativity and its related variables to observe how individual creativity contributes to organizational performance. In addition, this study strived to explore how to maximize the utilization of individual creativity and innovate the structure of the organization itself so that teams and organizations can respond more effectively to new rising trends. this study aimed to examine whether the value congruence between individuals and organizations (propensity congruence, goal congruence has a significant impact on knowledge sharing and innovation behavior as dependent variables by exerting individual creativity and synergy as independent variables. Research design, data and methodology - SPSS 24.0 program were used to analyze the data. Descriptive Statistics and correlation analysis were performed, and the reliability factor (Cronbach's α) was calculated. Afterwards, we analyzed the moderating effects of structural equation model analysis and hierarchical regression analysis. The number of samples used in the study were 309 copies. Results - First, Individual creativity had a positive effect on knowledge sharing and innovative behavior. In other words, it was confirmed that decision-making processes fused with individual creativity could create an atmosphere of knowledge sharing and transform the organization. Second, value congruence adjusted the influence of individual creativity on knowledge sharing and innovation behavior. Conclusions - First, it is important for managers to recognize the value and secure the pool of creative talents who will be a potential future basic source of organizational success and competitive advantage. Second, managers should be able to identify those with creative talents and expertise, and use them to increase their knowledge sharing performance, while also developing emotional and motivational creativity. Third, in order improve knowledge sharing performance, managers should pay attention to the emotional aspect of creativity. Fourth, managers should strive to create an environment that is beneficial for the reinforcement of individual self-management capabilities. Fifth, managers should be able to develop decision-making processes to develop potential creativity and encourage creative thinking, opinions, or solutions. Sixth, managers should promote the dissemination and integration of new knowledge based on the creative views and attitudes of team members.

• 한국수산과학회지
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• 제25권6호
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• pp.457-473
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• 1992

양향성 대륙붕에서 1차 파동방정식은 양 해안경계에서의 바람응력과, 대륙붕폭에 걸친 바람응력의 회전효과를 갖는다. 황해에서 바람응력 회전효과는 대륙붕파를 발생시키는 힘으로서 무시될 수 있다. 켈빈파는 대륙붕파보다 약화될 때까지의 거리가 매우 크기 때문에 황해 북쪽만(별)을 거의 약화되지 않고 통과할 수 있다. 파동특성을 따라 적분하는 수치방법은 반대방향으로 전파되는 파동을 수용하기 위해 조절되었다. 보다 실제와 가까운 해안선을 사용한 결과, 모델재생이 해류에서는 개선되었으나 해수면에서는 거의 개선되지 않았다. 이것은 해수면을 주로 결정하는 켈빈파가 해저지형의 변화에 영향을 극히 적게 받음을 의미한다 보다 개선된 해수면 재생을 위해서는 동지나 해에서 황해로 전파되는 켈빈파의 에너지를 알 필요가 있다. 해안을 따른 순풍류와 골을 따른 역풍류의 기본구조는 계절풍에 의해 발생하는 황해의 계절순환을 뒷받침한다.

• Bulletin of the Korean Chemical Society
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• 제23권3호
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• pp.447-453
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• 2002

In this paper we have presented the results of thermodynamic, structural, and dynamic properties of model systems for liquid benzene, toluene and p-xylene in an isobaric-isothermal (NpT) ensemble at 283.15, 303.15, 323.15, and 343.15 K using molecular dynamics (MD) simulation. This work is initiated to compensate for our previous canonical (NVT) ensemble MD simulations [Bull. Kor. Chem. Soc. 2001, 23, 441] for the same systems in which the calculated pressures were too low. The calculated pressures in the NpT ensemble MD simulations are close to 1 atm and the volume of each system increases with increasing temperature. The first and second peaks in the center of mass g(r) diminish gradually and the minima increase as usual for the three liquids as the temperature increases. The three peaks of the site-site gC-C(r) at 283.15 K support the perpendicular structure of nearest neighbors in liquid benzene. Two self-diffusion coefficients of liquid benzene via the Einstein equation and via the Green-Kubo relation are in excellent agreement with the experimental measures. The self-diffusion coefficients of liquid toluene and p-xylene are in accord with the trend that the self-diffusion coefficient decreases with increasing number of methyl group. The friction constants calculated from the force auto-correlation (FAC) function with the assumption that the fast random force correlation ends at time which the FAC has the first negative value give a correct qualitative trends: decrease with increase of temperature and increase with the number of methyl group. The friction constants calculated from the FAC's are always less than those obtained from the friction-diffusion relation which reflects that the random FAC decays slower than the total FAC as described by Kubo [Rep. Prog. Phys. 1966, 29, 255].