• Journal of Astronomy and Space Sciences
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• 제41권2호
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• pp.61-78
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• 2024

This study developed a real-time spacecraft pose estimation algorithm that combined a deep learning model and the least-squares method. Pose estimation in space is crucial for automatic rendezvous docking and inter-spacecraft communication. Owing to the difficulty in training deep learning models in space, we showed that actual experimental results could be predicted through software simulations on the ground. We integrated deep learning with nonlinear least squares (NLS) to predict the pose from a single spacecraft image in real time. We constructed a virtual environment capable of mass-producing synthetic images to train a deep learning model. This study proposed a method for training a deep learning model using pure synthetic images. Further, a visual-based real-time estimation system suitable for use in a flight testbed was constructed. Consequently, it was verified that the hardware experimental results could be predicted from software simulations with the same environment and relative distance. This study showed that a deep learning model trained using only synthetic images can be sufficiently applied to real images. Thus, this study proposed a real-time pose estimation software for automatic docking and demonstrated that the method constructed with only synthetic data was applicable in space.

• 가정과삶의질연구
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• 제34권3호
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• pp.65-84
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• 2016

This study examined the factors that were associated with longitudinal changes for ten years from 2004 to 2014 in time spent on housework by married couples who had a preschooler as their first-born child. It also sought to figure out how much of such temporal changes were attributable to differences in the means on associated factors as well as to differences in the influence or slope of such factors. A total of 9,668 time diaries from the Korean Time Use Survey were used to analyze the influence of couple's weekly work hours, wife's relative income, couple's education and gender role attitudes on the time spent on housework of husbands and wives. Results from descriptive statistics, regression and decomposition analysis were as follows. First, women decreased, while men increased their time doing housework. Second, weekly work hours of husband and wife were related to their time doing housework in every year surveyed. Third, wife's relative earnings and couple's gender role attitudes affected wife's time doing housework more than husbands', whereas couple's education had stronger effects on husbands than wives. However, such influence was apparent on a certain survey year, and then disappeared in another, or became stronger or weaker longitudinally. Fourth, the temporal decrease in wife's housework time and increase in husband's housework time were attributable to social and cultural changes such as reduced working hours, rising female income, higher educational background, and prevalence of egalitarian gender role attitudes. Findings suggest that the trend in spending time on housework is expected to continue, and provide a timely policy implications to facilitate the change.

• 한국콘텐츠학회논문지
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• 제16권7호
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• pp.492-503
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• 2016

본 연구는 노년기 영적안녕감과 죽음 준비도 그리고 내세관이 죽음에 대한 태도에 미치는 영향을 알아보고자 하였다. 또한 죽음에 대한 올바른 인식과 태도를 형성하여 죽음불안을 경감시키고, 만족스러운 노년의 삶을 살아갈 수 있도록 실천적 개입기술을 개발하고자 하는데 목적이 있다. 연구방법은 원주시에 거주하는 65세 이상의 노인들에게 설문지법으로 조사하여 SPSS 통계프로그램으로 결과를 도출하였다. 주요결과는 다음과 같다. 첫째, 영적안녕감과 죽음준비도 그리고 내세관이 죽음에 대한 태도에 미치는 영향을 분석한 결과 유의미한 (p<.001) 차이가 나타나 영향이 있는 것으로 나타났다. 둘째는 내세관, 죽음준비도, 영적 안녕감이 죽음에 대한 태도에 미치는 영향의 상대적 중요도 차이를 분석한 결과는 (P<.001)로 99.9% 신뢰수준 이상에서 통계적으로 유의한 영향관계가 있는 것으로 나타났다. 즉 죽음준비도, 영적 안녕감 순으로 죽음에 대한 태도에 영향을 미치며, 내세관은 다른 두변수가 영향을 미칠 경우 유의한 영향을 미치지 않는 변수로 나타났다. 셋째는 인구사회학적 변인 포함 후 죽음준비도, 내세관, 영적 안녕감이 죽음에 대한 태도에 미치는 영향을 분석한 결과 경제수준차이에서만 (p<.05) 통계적으로 유의한 음의 영향을 미치고 있는 것으로 나타났다. 따라서 죽음 준비도, 영적 안녕감은 노인의 삶의 질을 좌우하는 부분으로서 죽음불안을 해소하는 데 큰 영향이 있음을 본 연구를 통해 확인하였다. 따라서 본 연구의 의미는 죽음에 대한 불안을 긍정적으로 해소할 수 있다는 점을 검증할 수 있었다는데 의미가 있다.

• 한국유통학회지:유통연구
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• 제13권2호
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• pp.97-123
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• 2008

유통업체 브랜드(PB)의 중요성이 부각되면서 최근까지도 유통업체 브랜드의 구매의도에 영향을 미치는 다양한 선행요인들을 밝히는 연구들이 제시되고 있다. 이러한 흐름에 맞춰 본 연구에서는 유통업체 브랜드에 대한 평가 시 소비자들이 외재적 단서로 활용할 수 있는 새로운 영향요인으로서 기존 연구에서 제시되지 않은 유통업체에 대한 신뢰와 PB상품 제조업체에 대한 신뢰를 제시하였다. 그리고 이러한 두 신뢰요인이 PB상품에 대한 평가 및 구매의도에 영향을 미치는데 있어 유통업체 브랜드에 대한 소비자의 지식수준에 따라 그 영향력이 달라지는지를 살펴보고 있다. 분석결과, 유통업체와 제조업체에 대한 신뢰는 유통업체 브랜드의 지각된 품질에 영향을 미치는 것으로 나타났다. 또한, 유통업체에 대한 신뢰는 유통업체 브랜드에 대한 지각된 품질, 그리고 제품태도 및 구매의도에 직접적인 영향을 미치는 것으로 나타났다. 그러나 제조업체에 대한 신뢰는 유통업체 브랜드에 대한 지각된 품질에만 직접적으로 영향을 미쳤으며, 제품에 대한 태도와 구매의도에는 지각된 품질을 매개로하여 영향을 미치는 것으로 나타났다. 이러한 차이를 좀 더 구체적으로 살펴보기 위하여 소비자의 지식수준에 따라 두 집단으로 나누어 영향관계를 살펴본 결과, 유통업체 브랜드에 대한 경험정도나 지식수준이 높은 소비자 집단에서는 유통업체에 대한 신뢰가 제품의 지각된 품질, 제품태도, 구매의도 등에 직접적인 영향을 미치는 것으로 나타났으나, 제조업체에 대한 신뢰는 품질지각, 제품태도, 구매의도에 영향을 미치지 않는 것으로 나타났다. 반면, 지식수준이 낮은 소비자집단의 경우 유통업체와 제조업체 신뢰 모두 PB상품의 품질을 지각하는데 중요한 역할을 하는 것이 밝혀졌다. 이러한 결과는 지식수준이 낮은 소비자들이 지식수준이 높은 소비자들보다 유통업체와 제조업체에 대한 신뢰 의존도가 더 높다는 사실을 제시해준다.

• 한국콘텐츠학회논문지
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• 제22권8호
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• pp.106-114
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• 2022

본 연구는 유튜브 이용에 중요한 요인으로 작용하고 있는 유튜브의 이용동기와 이용강도에 따라 프리롤 광고의 수용태도에 어떠한 차이가 있는지를 실증적으로 규명해 보고자 하였다. 이를 위해 남·여 대학생을 대상으로 설문조사를 진행했으며 200명의 데이터가 분석에 활용되었다. 연구결과 첫째, 유튜브 이용동기에 따른 광고의 긍정적인 태도는 정체성 표현 추구 집단이 습관적 이용 집단이나 여유 및 즐거움 추구 집단보다 더 높은 것으로 나타났으며, 회피행동은 여유 및 즐거움 추구 집단이 정체성 표현 추구 집단이나 습관적 이용 집단보다 더 높은 것으로 나타났다. 둘째, 유튜브 이용강도에 따른 광고의 긍정적인 태도는 이용강도가 높은 집단이 낮은 집단에 비해 더욱더 긍정적인 태도를 보이는 것으로 나타났으며, 광고에 대한 회피행동은 차이를 보이지 않았다. 이러한 결과는 유튜브 프리롤 광고를 집행하는 데 있어 이용자들의 이용동기와 이용강도에 따른 이용행태를 고려한 전략이 필요하다는 것을 시사한다.

• 대한간호학회지
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• 제32권3호
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• pp.305-316
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• 2002

This study examined the crisis experiencing by middle - aged women and tried to understand their lived experiences also explored the nature of their crisis. Method: The data was collected from 7 participants living in Incheon and Seoul from Sep. 2000 to Feb. 2001. The analysis of the data was made the phenomenological analytic method suggested by Giorgi. Result: The meanings of the lived experiences of the middle - aged women's crisis ; Impatience about decreased physical function : an attack of a disease, decreased strength, decreased quickness, decreased desire, increased concern of health, poor memory, easy fatigue, change of appearance, change of conjugal relations, sense of loss. Psychological, emotional disturbances : sense of emptiness, regret, sharpness, feeling gloomy, fear of dying, loneliness, feeling the want, loss of confidence. Attitude of active life : reinforcement of self experience, enrichment of understanding, search of self satisfaction, search of self development, development of support system, management of independent life. Envy feeling from relative comparison : feeling of comfort, unsatisfaction to the husband, yearning for youth. Conclusion: Therefore, the program should be developed for the program of physical, psychological, and emotional health and expansion of social role of the middle - aged women.

• Journal of Advanced Research in Ocean Engineering
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• 제3권1호
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• pp.25-31
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• 2017

Generally, underwater gliders do not have separate propellers for their forward movement. They derive a propulsive force due to the difference between their buoyancy and gravity. The attitude of an underwater glider is controlled by changing the relative position of the buoyancy center and mass center. In this study, we derived nonlinear 6-DOF dynamic and mathematical models for the motion controller and buoyancy controller. Using these equations, we performed dynamic underwater glider simulations and verified the suitability of the design and dynamic performance of the proposed underwater glider.

• 가정과삶의질연구
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• 제16권2호
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• pp.1-10
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• 1998

This study purpose to know the degree of adolescent consumer's conspicuous consumption how difference do adolescent consumers' conspicuous consumption have by socio demographic variables socio-psychological variables consumer ability. Therefore we suggest the adolescent consumer's sound consumption to consumer education. To approach to above purpose the research question are as the followings. 1) The average level of conspicuous consumption a little low median point. This implies that comsumer education is necessary for the adolescent consumer in order to reduce the level of conspicuous consumption. 2) Theadolescent consumers' consumption differs significantly according to the sex(p<0.05) monthly mean income of family(P<0.01) degree of taking in massmedia (P<0.01) subjective status on oneself(P<0.01) consumer socialization(P<0.01) 3) According to the results of the regression analysis examining the relative influences of variables affecting for conspicuous consumption the rela ive importance of the variables ; degree of taking in massmedia sex consumer knowledge communication with peers consumer attitude and the amount of allowance.

• Journal of Information Technology Applications and Management
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• 제16권2호
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• pp.65-77
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• 2009

This study explores the major factors that are likely to affect the acceptance and resistance of innovative products and services. The TAM (Technology Acceptance Model) has been widely used for understanding consumer acceptance of new technology. This model displays perceived usefulness and perceived ease of use as antecedents of intention to adopt and use. However, research has reported a variety of preceding variables for technology acceptance. In addition, considering paradoxes of technology, research regarding both acceptance and resistance in an integrated model can explain consumer perception and behavior in detail. The results of this study states that relative benefits, degree of innovation in technology, perceived usefulness and perceived ease of use have had positive influence on the intention to adopt but negative impact on that of resistance. However, alterations of usage and perceived risk positively affects resistance, but also have negative effects on the intention to adopt. Finally, intention to adopt has comparatively greater influence than that of resistance on intention to use. Theoretical and managerial implications of the results are also discussed.

• 보건행정학회지
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• 제3권2호
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• pp.27-80
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• 1993

It is widely known that patients' utilization pattern for medical care facilities and the patientflow are influenced by multi-factors, such as demographic characteristics, structural characteristics of society, socio-psychological characteristics(value, attitude, norms, culture, health behavior, etc.), economic characteristics(income, medical price, relative price, physician induced demand, etc.), geographical accessibility, systematic characteristics(health care delivery system, payment methods for physician fees, form of health care security, etc.), and characteristics of medical facilities(reliability, quality of medical care, convenience, kindness, tec.). This study was conducted to research the mechanism of patient-flow according to changes of health care system(implementation of national health insurance, health care referral system and regionalization of health care utilization, etc.) and characteristics of medical facilities(ownership of hospital, characteristics of medical services, non-medical characteristics, etc.). In this study, the fact could be ascertained that the patient-flow had been influenced by changes of health care system and characteristics of medical facilities.