• Journal of The Korean Astronomical Society
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• v.47 no.6
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• pp.279-291
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• 2014

I show that the WFIRST microlensing survey will enable detection and precision orbit determination of Kuiper Belt Objects (KBOs) down to $H_{vega}=28.2$ over an effective area of ${\sim}17deg^2$. Typical fractional period errors will be ${\sim}1.5%{\times}10^{0.4(H-28.2)}$ with similar errors in other parameters for roughly 5000 KBOs. Binary companions to detected KBOs can be detected to even fainter limits, $H_{vega}=29$, corresponding to R~30.5 and effective diameters D~7 km. For KBOs H~23, binary companions can be found with separations down to 10 mas. This will provide an unprecedented probe of orbital resonance and KBO mass measurements. More than a thousand stellar occultations by KBOs can be combined to determine the mean size as a function of KBO magnitude down to H~25. Current ground-based microlensing surveys can make a significant start on finding and characterizing KBOs using existing and soon-to-be-acquired data.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.10 no.3
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• pp.1429-1441
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• 2016

While Facebook and Twitter get worldwide attention, these popular SNSs are not available in China. As the leading local SNS, Sina Weibo has garnered much of the attention in China. The purpose of the study was to explore why Chinese college students use Sina Weibo and if gender differences exist in the motivations for using it. The results from a survey of 360 respondents show that Chinese students used Sina Weibo mainly for information-gathering, followed by accessibility to celebrity, social connection, self-presentation and entertainment. Among them the most dominant reason for using Sina Weibo was found to be information-gathering. This finding suggests that Sina Weibo functions as a platform to search for information on social issues and interests. The study also found that these motivations were significantly different between male and female users. Interestingly, female respondents used Sina Weibo much more broadly than male counterparts, accessing it to satisfy all needs such as information gathering, accessibility to celebrity, social connection, self-presentation and entertainment. Based on these findings limitations and direction for future studies are discussed.

• The Bulletin of The Korean Astronomical Society
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• v.42 no.1
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• pp.30.1-30.1
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• 2017

In the hope to detect low-surface brightness features (${\mu}_{r^{\prime}}{\sim}27\;mag\;arcsec^{-2}$), we carried out KASI-Yonsei Deep Imaging Survey for Clusters (KYDISC) targeting 14 local clusters at 0.016 < z < 0.145 using Magellan/IMACS telescope and CFHT/MegaCam. Out of 1450 cluster galaxies, 18% of galaxies show the signatures of galaxy mergers. We explore merger-driven changes from various point-of-view. We first examine color-magnitude relations, and find that galaxies related to recent mergers are populated more on blue color than their counterparts. Besides, we find the extremely low frequency of mergers on low-mass red-sequence galaxies, suggesting a migration of red galaxies into the green-valley region through merger-driven star-formation. We also study the mass-size relation of our sample, finding a larger galaxy size in galaxies related to recent mergers. Our results suggest that mergers can simultaneously change properties of galaxies, making outliers on galactic scaling relations.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2004.11a
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• pp.105-109
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• 2004

The purpose of this study is to find out branded apartment images families with different children ages favored. On-line survey was conducted in the Seoul Metropolitan Areas, and the 181 responses were used for the data analysis. Four children age cohorts were applied to describe favorable branded apartment images - families with infants or toddlers, elementary school children, adolescents and college students. The finding indicated that the respondents preferred branding apartments mainly because it was likely to reflect quality. Also it was found that the most favorable branded apartment image was safety, and the investment-related image was favored by families with young children while the image of comfort by those with adolescents. Families with kids preferred the image of environmental friendliness, those with did a health-related image, and the other two groups did the safety image.

• Korean Institute of Interior Design Journal
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• no.22
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• pp.30-38
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• 2000

The purpose of this study was to examine the tendency of 272 theses which published in the Korean institute of interior design journal from 1992.4 to 1999.6. The major finding were summarized as follows; 1) The subjects of the these in the journal were mostly related to design solution or design theory. Therefore, more theses for design history or human behavior are needed for the future. 2) The purposes of the these in the journal were classified into two groups, first; grasp and investigation of the phenomenon in the design or design related theory, second; suggestion of problem solving ideas in the design or design related study. There were 6 categories in each group and the diversified research purpose in the theses is very desirable trend for the future development in interior design studies or industry. 3) The research methods of the theses in the journal were literature research, experimental research, survey research and design research. The data collection methods in the KIID journal is similar to the that of field, natural science or social science.

• Culinary science and hospitality research
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• v.13 no.3
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• pp.20-32
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• 2007

This study investigates the satisfaction with the supply-supplying system and the kitchen operation for the main menu in the food service industry, expecially in the franchisor-franchisee relation. In order to accomplish this purpose of the study, it examines the research on the franchise food industry in terms of research methods and surveys experimental research actually. The total 600 copies of survey had been gathered and 278 copies were used to get the purpose of this study. The SPSS 12.0 version was used to analyze the data. The finding suggests that pork is the very essential material of the supply-supplying system on all kitchen operation of cooking quality, management system, physical supplying system, prime cost and the food hygiene. Comparing results of mean statistic, pork shows much higher mean point than that of chicken on the kitchen operation efficiency. Also, the franchisees will give more satisfaction with main menu using pork than the menu using chicken on the recharter intention.

• Journal of the Korean Society of Safety
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• v.21 no.6 s.78
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• pp.33-37
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• 2006

Underwater lighting is installed in water tanks, fountains and pools in waterparks, it has direct contact with water and in case of any electrical failure due to faults from electrical equipment, there is a lot of electrical shock risk. In this paper, we proposed an improvement plan of the standard of judgment of electrical code which is MOCIE (Ministry of Commerce, Industry and Energy) notification by fact finding survey and analysis of the domestic and foreign codes.

• Journal of the Korean Home Economics Association
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• v.35 no.5
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• pp.151-162
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• 1997

The purpose of this study was to examine the impacts of various stressors among dual-earner families on parenting stress and marital satisfaction. Using a survey data collected from 168 dual-earner couples, this study investigated impact of various stressors, including husband division of labor, the satisfaction of childcare arrangement, husband's support on wife's outside work, family socioeconomic status, and strains from job. The finding suggested that, after controlling background variables(length of marriage, the number of children, and family income), high husbands' support on wife's outside work and low strains about their work hours had influenced on higher parenting stress among fathers, while high strains about their work hours had related to high parenting stress among mothers. It also found that high satisfaction on childcare arrangement and low depression were the factors predicting higher marital satisfaction of mothers, and high support on their wife's outside work, low work role strain, low depression, and low parenting stress had influenced on higher marital satisfaction among fathers. Discussions and recommendations for future research were added.

• Knowledge Management Research
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• v.15 no.1
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• pp.45-63
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• 2014

Due to advance in Internet technology, most tourists tend to search travel information in the Online Travel Communities(OTC). Given this new paradigm in terms of finding travel information, most of relevant studies in this area are still dealt with explaining tourists' behaviors regardless of the types of communications. Therefore, to overcome some limitations in previous studies, we attempt to examine the relationships between both formal and informal communications and tourists' behavioral changes in the OTC context. Specifically, we developed a research model by employing the PPM(push-pull-mooring) framework and tested it to understand why and how tourists' behaviors might be changed. Survey data collected from 323 online tourists were used to test the model the model using SEM(structural equation modeling). The implications of our empirical findings for both research and practice are discussed.

• Journal of Engineering Education Research
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• v.14 no.6
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• pp.3-15
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• 2011

The purpose of this study was to examine the satisfaction and needs of female students in Engineering with counseling male professor. Subjects of this study were 92 female students in Engineering from a university in K city. Results of survey showed that women students in Engineering were most satisfied with the usefulness of counseling and next with male professor's attitude as counselor. Counseling needs of female students in Engineering was highest on receiving concrete information on finding a job from counseling and next to it on understanding women students. Results of focus group interview and suggestions for the study in the future were presented respectively.