• Publications of The Korean Astronomical Society
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• v.30 no.2
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• pp.201-204
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• 2015

The common-envelope process is a complicated phase in binary evolution. A lot of effort has been dedicated to study the common-envelope stage, but many questions related to this process are yet to be answered. If one member of the binary survives the common-envelope phase, the binary will emerge as a white dwarf accompanied by a low-mass main sequence star in close orbit, often referred as a post common-envelope binary (PCEB). SDSS J0745+2631 is among the list of newly found PCEBs from the Sloan Digital Sky Survey (SDSS). This star is proposed to be a strong eclipsing system candidate due to the ellipsoidal modulation in its light curve. In this work, we aim to confirm the eclipsing nature of SDSS J0745+2631 and to determine the stellar and orbital parameters using the software Binary Maker 3.0 (BM3.0). We detected the primary eclipse in the light curve of SDSS J0745+2631 in our follow-up observation from January 2014 using the ULTRASPEC instrument at the Thai National Observatory. The data obtained on 7th and 8th January 2014 in g filter show an evident drop in brightness during the eclipse of the white dwarf, but this eclipse is less prominent in the data taken on the next night using a clear filter. According to our preliminary model, we find that SDSS J0745+2631 hosts a rather hot white dwarf with an effective temperature of 11500K. The companion star is a red dwarf star with a temperature of 3800K and radius of 0.3100 $R_{\odot}$. The red dwarf star almost fills its Roche lobe, causing a large ellipsoidal modulation. The mass ratio of the binary given by the Binary Maker 3.0 (BM3.0) model is M2/M1 = 0.33.

• Journal of the Korea Safety Management & Science
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• v.19 no.2
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• pp.173-180
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• 2017

Omni-channel strategy is an innovative paradigm for integrated information distribution of inventory, sales, operations, marketing, delivery, pickups and returns in supply chain management. Recently the distribution strategy faces new challenges with the advent of mobile distribution channels. Social media with countless apps imposes additional stress on supply chain operations. Due to these changes, distribution network in supply chain is changing naturally and rapidly from multi-channel to omnni-channel platform. Recently numerous domestic distributors establish and adapt this new supply chain optimization tool as a part of seamless flow of movements of goods from one channel to other channels. The objective of this paper is to present a preliminary findings on how omnni-channel affects the supply chain management. A survey is used to ascertain in the degree of omnni-channel implementation and statistical evidence is provided to test sets of hypothesis. The results of the questionnaire showed that consumers' purchasing styles differed by gender, age, purchase purpose, and product type. In particular, women consider purchasing experience in omni-channel to be important. As food and household goods can be conveniently shipped, consumers prefer online purchasing it. Conversely, consumers tend to favor omni-channel strategy in connection with offline experience in IT products.

• Journal of Korea Water Resources Association
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• v.39 no.12 s.173
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• pp.1031-1042
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• 2006

In recent years, a growing concern exists in watershed and stream improvement projects. Under these circumstances, this paper estimates monetary value of the attributes of alternatives for rehabilitation of hydrologic cycle using choice experiments. Choice experiments shows vivid image and estimates a willingness to pay based on their preference for environmental goods. A preliminary survey shows that the attributes of the Anyangcheon watershed are flood-damage possibilities, Instreamflow, water quality, river characteristic and estimates the tax for the Anyangcheon watershed improvements. We surveyed 200 citizens were selected as samples of watershed beneficing in Seoul and Gyeonggi Province and used conditional logit model to analyze the implicit values of the attributive per household. The benefit of the attributes by province based on the implicit price obtained from estimated parameters were calculated. This study is expected to contribute to the decision-making process for policy-makers by providing useful methodological framework and quantitative information related to watershed improvement projects.

• Korean Journal of Plant Resources
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• v.25 no.4
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• pp.433-446
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• 2012

The preliminary study for providing the relationship of the factors which are climate and the pteridophyta was carried out. Dormancy form and leaf phenology of the 321 taxa belonging to 27 families were analyzed. This survey shows life-form spectrum of Korean ferns. The results obtained from this study were as follows: Deciduous (d), Evergreen (e) and Summer-deciduous (sd) were calculated as 37.4%, 59.2%, 1.9%, respectively and the Evergreen (e) has the highest value compared to the other leaf phenologies. It observed from the life-form spectra that Hemicryptophytes (H) was the most common dormancy form at 42.1%. Geophytes (G), Epiphytes (E) and Chamaephytes (Ch) were calculated at 25.5%, 15.9%, and 11.8%, respectively. There will be a discussion about geographical distribution of Korean ferns and possibility of their distribution range.

• Journal of Korea Society of Industrial Information Systems
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• v.13 no.3
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• pp.100-109
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• 2008

In the 1990s and 2000s there was considerable growth in implementation of Enterprise Resource Planning(ERP) Systems. It is estimated that the ERP market will grow to about $65 billion by 2009. Companies expect these systems to support many of the day to day business transactions. However, the implementation projects of ERP are big, strategic and complex projects which involve lots of time, scope and costs. Because of that, companies have to create conditions, in which they can implement chosen solution in expected time, scope and budgeted costs. This means that companies should be aware of what most critical factors for success of ERP implementations are. This study will first investigate the ERP implementation CSFs by studying prior published researches on the field of ERP implementation. Then, this study will discuss in depth some important factors of ERP implementation and represent preliminary results CSFs of ERP implementation empirical survey.

• Journal of Fashion Business
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• v.15 no.6
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• pp.204-215
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• 2011

This study was attempted to be a help in estimating changes of men's fashion in sociocultural environment by examining the diversified trends of domestic men's fashion through literature review, fashion collection analysis and questionnaire in various aspects. For data collection in this study, questionnaires were used, and these were corrected and supplemented after preliminary survey for male consumers from September 2009 to March 2010. Among total 460 copies, 431 copies were used in final analysis. First, among typical factors of changes in image of men's fashion, change of sexual role was shown as the most important factor. Contrary to men of the past, modern men are actively taking care of their appearance with changes of social values, which indicates that viewpoints on men have become flexible, such that the image of beauty does not apply just to women. Second, analysis on factors of image changes in men's fashion by age revealed that high mean values were obtained in factors of change of sexual role and trend with difference between groups, and factors of expression of individuality were highly rated without remarkable difference, and aesthetic factors were poorly rated without significance. Third, analysis on preference for formative characteristics of the Metro Sexual showed that feminine materials were negatively rated, and analysis on wearing experience revealed that several items become popular, indicating that wearing experiences are increasing in various areas. This study suggests a new viewpoint of cultural sexual consciousness of the youth that is continuously changing, and is meaningful in understanding emotional and rational lifestyle and cultural style of Metro Sexual, a recent phenomenon of men's fashion.

• Journal of Technologic Dentistry
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• v.38 no.4
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• pp.353-363
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• 2016

Purpose: This study aims to assess clinical practice satisfaction among dental technology students and to identify the factors that may influence their career decision levels. In doing so, the present study provides preliminary data as to ways to improve clinical practice satisfaction levels and career decision levels that would be optimal for one's competence. Methods: he survey was conducted on dental technology students. The collected data was analyzed by the statistical program SPSS 21.0. The results were analyzed by reliability, frequency, multiple-way ANOVA, correlation, multiple regression. To test for significance on each item, p<0.05 has been decided as a standard. Results: Analysis results indicate that the factors influencing clinical practice satisfaction of dental technology students include school year, satisfaction of major, area of clinical practice, and assigned department for clinical practice, while the factors that influence career decision levels include satisfaction of major and clinical practice satisfaction. Conclusion: Results of present study suggest that in order to improve clinical practice satisfaction among dental technology students and thereby career decision levels, one needs to focus on satisfaction of major and quality of clinical practice. Such efforts will enable a more active and effective approach toward clinical practice for the dental technology students, and with appropriate understanding and assessment of the experience, they will be better equipped to make a career decision where they can live up to their competence.

• Journal of the Korean Data and Information Science Society
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• v.23 no.3
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• pp.525-534
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• 2012

The purpose of this study is to increase the employment rate of graduates in the fields of the S/W and H/W. In order to seek employment in various major fields of the S/W and H/W, firstly, this paper proposes the educational case study that increases the concern about employment and develops learner's ability in the unfavorable major fields. Secondly, this paper presents the future driving improvement for the employment rate on the basis of the department's special characteristics and the actual circumstances in the fields of the S/W and H/W. This paper conducts the surveys of each 40 seniors majoring in S/W and H/W respectively in order to measure the understanding of probability/statistics which has been used as tools in the unfavorable major fields. With the purpose of increasement on the employment rate, the paper is designed to have 3 steps, that is, a preliminary questionnaire for employment preference, major courses connecting probability/statistics and a post-questionnaire for employment preference, which eventually investigates the changes of the perception on employment. This paper is verified by the multiple regression analysis to approve the effect on improving learner's academic achievement.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.1
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• pp.36-44
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• 2016

This study examined the nursing student's preliminary knowledge and awareness of patient's personal information protection. 187 respondents, who were trained in 2 different nursing colleges in Kyungpook province, participated in the survey from May 18 to June 12, 2015. Using the data collected, descriptive statistics, T-test and one-way ANOVA were implemented. As a result, the student nurses, who had heard about the Personal Information Protection Act showed a significantly higher awareness score of patient's personal information protection behavior than those who did not. The respondents educated in personal information protection were reported to have a higher score of awareness about the patient's personal information protection behavior. In this regard, it is vital for university organizers to develop education associated with ethics and information security, which could enhance the perceptions of personal information protection for student nurses before their working career begins.

• Environmental Engineering Research
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• v.13 no.3
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• pp.147-154
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• 2008

The purpose of this study was, as a preliminary step for understanding the whole aspects of the impacts of a weir on the ecosystems in upper and lower streams, to find out the impacts of the weirs with and without a fish-way. A survey on the aquatic ecosystem of upper and lower streams of weirs in Ham-an Stream was carried out from June to October, 2006. Results of the investigation showed that some meaningful effects on the ecosystems had occurred by the weirs. The fish fauna in upper stream of the weir with a fish-way appeared to include 3 families, 8 species, and 184 individuals, while that in the lower stream of the weir appeared to include 5 families, 14 species, and 664 individuals. The fish fauna in the upper stream of the weir without a fish-way appeared to include 3 families, 9 species, 107 individuals, while that in the lower stream of the weir appeared to include 9 families, 19 species, 520 individuals, disclosing that, no matter with or without a fish-way, fish fauna species diversity and size of population were more abundant and bigger in the lower stream than in the upper stream, but that difference of fish fauna species diversities between upper and lower streams of the weirs appeared to be bigger for the weir with a fish-way than for the weir without a fish-way. Benthos species diversity and size of population were found to be more abundant and bigger in lower stream than in upper stream, and in wet season than in dry season.