• 한국경영정보학회:학술대회논문집
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• 2007.06a
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• pp.576-581
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• 2007

The purpose of this paper is to strengthen trust on the automated collaborative filtering system. Automated collaborative filtering system is quickly becoming a popular technique for recommendation system. This elaborative methodology contributes for reducing information overload and the result becomes index of users' preference. In addition, it can be applied to various industries in various fields. After it collaborative filtering system was developed, many researches are executed to enhance credibility and to apply in various fields. Among these diverse systems, collaborative filtering system which uses Pearson correlation coefficient is most common in many researches. In this paper, we proposed new process diagram of collaborative filtering algorithm and new factors which should improve the credibility of system. In addition, the effects and relationships are also tested.

• Journal of KIISE:Information Networking
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• v.36 no.4
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• pp.297-308
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• 2009

In 2008, ETRI developed a new mobile digital ID wallet, in which anyone can store personal information and PKI credential. When the wallet is used, privacy protection is one of the most important problems and personal information should be protected under various usage scenarios such as exchanging sensitive information in on/off-line environments, joining as a new member in the web site, etc. In this paper, we propose a triangular trust management scheme that can effectively manage trustness and also protect sensitive personal information. This scheme relies on three techniques: PKI, reputation and condition (situation context). We implemented prototype of our scheme, and tested it under various scenarios, which showed that the proposed scheme can effectively be used for diverse cases.

• Journal of Intelligence and Information Systems
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• v.19 no.4
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• pp.1-10
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• 2013

Personalization aims to provide customized contents to each user by using the user's personal preferences. In this sense, the core parts of personalization are regarded as recommendation technologies, which can recommend the proper contents or products to each user according to his/her preference. Prior studies have proposed novel recommendation technologies because they recognized the importance of recommender systems. Among several recommendation technologies, collaborative filtering (CF) has been actively studied and applied in real-world applications. The CF, however, often suffers sparsity or scalability problems. Prior research also recognized the importance of these two problems and therefore proposed many solutions. Many prior studies, however, suffered from problems, such as requiring additional time and cost for solving the limitations by utilizing additional information from other sources besides the existing user-item matrix. This study proposes a novel implicit rating approach for collaborative filtering in order to mitigate the sparsity problem as well as to enhance the performance of recommender systems. In this study, we propose the methods of reducing the sparsity problem through supplementing the user-item matrix based on the implicit rating approach, which measures the trust level among users via the existing user-item matrix. This study provides the preliminary experimental results for testing the usefulness of the proposed model.

• Journal of Applied Tourism Food and Beverage Management and Research
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• v.15 no.1
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• pp.57-80
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• 2004

Resort Hotel Rate System was first introduced as an official guideline after Tourism Promotion Act, which enables the secretary of transportation to rate resort hotel by its facility and accommodation, was enacted on January 18, 1971. And the system was modified time to time to what we currently have after numerous revisions. However, the system has made a slow progress compare to the other countries system and have shown many potential problems that need to be improved. There is a problem that it is not even clear whether the act is as effective to apply it to rate any resort hotel in reality. The hotel rate system was first introduced in 1970's and changed ever since, and it also changed the private organizations to audit the decision. However, unlike the hotels in other countries, our hotel rating system is not focus on the customer's service and informations. It focus on the hotel's quality so that cause the problem whether the hotel is for customer or not In other different countries, they have some specific standard for evaluation of customer service based on customers' reference or needs. However, there is no evaluation part concerning on customer service in Korea. Also, even the hotel rating system is not based on the hotel waitress or waiter's service part. It means the system is almost focus on the hotel's qualities. Therefore, customer who needs hotel service, can not trust whether they can choose the hotels which gives the right informations and good quality services. Although hotel's physical layout is important, the service part is also important for evaluating the hotel entirely. There are a lot of things to develop and to be changed in order to develop tourism industry in the process of decision about Hotel's level in Korea Thus, this research will summarize some problems which are revised through the former research of hotel's level. And it will compare the system of hotel's level between Korea and developed countries in hotel industry Additionally, I will show current tourism industry in Korea. Finally, I suggest the improvement proposal for the level system of hotel in Korea and process of this system in the future.

• Journal of Korea Trade
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• v.26 no.4
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• pp.63-82
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• 2022

Purpose - Drawing on relational institutional theory, we explored how demographic similarity between board members of a firm and newly emerged political elites led to firms' increased financial resource acquisition such as leverage ratio and decreased export intensity amidst the Asian financial crisis. We also studied how a firm's leverage ratio and export intensity can further affect firm profitability and financial credit rating. Design/methodology - We revisited and explored a unique, unprecedented crisis that affected most Korean firms: the Asian financial crisis that coincided with a governmental shift from a conservative to a liberal party. We collected demographic information from 432 listed Korean firms' board members and 43 political elites of the Blue House from 1998-2000 to create a demographic similarity measurement. We collected firms' financial information, built panel data, and used ordinary least squares regression to test our theory. Findings - Our results showed that demographic similarity between a firm's directors and newly emerged politicians had a positive association with a firm's leverage ratio but a negative association with a firm's export intensity. A firm's leverage ratio had a negative relationship with firm performance measured by firm profitability and financial credit rating. A firm's export intensity showed a positive effect on firm performance. Originality/value - We highlighted that during an economic crisis that coincided with a governmental shift and change of leading political actors, firms exerted efforts to survey the environment and build new external stakeholder relationships to cope with the changing landscape. We proposed that in an emerging market like Korea where low levels of trust and favoritism are prevalent across society, one of the relational institutional strategies that firms can employ is the selection of directors with similar demographic characteristics to political elites based on factors including birthplace and school affiliations. We examined the efforts of firms to build political networks with newly empowered political elites during a financial crisis, and the consequences of establishing such networks. We highlighted that during a financial crisis, the demographic similarity between a firm's board members and newly emerged politicians can provide firms with access to financial resources but can also result in poor management and reduced effort to enhance its international competitiveness.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.26 no.4
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• pp.64-75
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• 2018

A status of air traffic controller is a government officer and air traffic controllers who work at airport are divided by duty rating and work experience. Abiding by law, rules and regulation, air traffic controllers are working together based on mutual trust. This paper's theoretical background is based on cultural bias theory. The theory divide people group into four groups according to cultural bias such as fatalism, hierarchy, individualism and egalitarianism. A research model was designed how such four cultural bias could affect air traffic controller's risk response in case of emergency or abnormal situation during their work. Depend on empirical research, it was found that air traffic controllers perceived they had been more biased to fatalism than hierarchy. The characteristics of fatalism group are as follows: first of all, they follow rigid rules and regulation. However, they have less self-efficacy compared to other government officers. According to structural equation model, air traffic controller's fatalism had a significant negative effect on organizational royalty. Their royalty, however, had a very significant positive effect on planning response and immediate response.

• Korean Journal of Psychosomatic Medicine
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• v.20 no.1
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• pp.40-49
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• 2012

Objectives : To examine emotional and psychological characteristics associated with suicide attempts in depressed patients. Methods : A sample of 37 inpatients diagnosed with major depressive disorder or depressive disorder NOS was divided into two groups : lifetime suicide attempters(N=15 ; 40.54%), non-attempters(N=22 ; 59.46%). Beck Depression Scale(BDI), Beck Anxiety Scale(BAI), Hamilton Depression Rating Scale(HDRS), Hamilton Anxiety Rating Scale(HARS), and MMPI-2 were used to evaluate symptoms severity and psychological characteristics. Results : Suicide attempters scored higher on the BDI though there were no group differences on the HDRS and on the both anxiety scales. Also they showed higher scores on the F, Fb, Pa, RC1, DEP, HEA, PK, AAS among MMPI-2 subscales. Our findings suggest that suicide attempters among depressed patients undergo more severe subjective distress and difficulties in adjustment than non-attempters. Also they were more hostile to others and showed lower trust. Lastly, they showed more somatic complaints and substance related problems. Conclusion : The present study showed that suicide attempters among depressed patients have distinct emotional and psychological characteristics. MMPI-2 would be helpful to assess suicidal risk of depressed patients.

• Korean Parent-Child Health Journal
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• v.7 no.2
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• pp.133-143
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• 2004

Purpose: The purpose of this study was to compare mother's caring-confidence, between primipara perception of the newborn, and child-rearing attitude and multipara. Method: The data was collected from 159 married mothers of newborns in the post-partum care center using self-rating questionnaires from November, 2003 to March, 2004. Data was analyzed using SPSS/Win program by t-test and Pearson Correlation coefficient. Result: 1) The mean score of mother's perception of the newborn, the newborn caring-confidence, and child-rearing attitude were .26, 3.13, and 3.43. 2) The score of the newborn caring-confidence of multipara was greater significantly than the one of primapara. 3) The score of mother's perception of tile newborn and child-rearing attitude of primapara were greater than the one of multipara but there were no significant differences. 4) There was a positive correlation between mother's perception of the newborn and child-rearing attitude and significant correlation between caring-confidence and child-rearing attitude. 5) The score of mother's perception of the newborn was significantly different according to the level of education type of family and delivery planned. 6) The score of caring-confidence was significantly different according to the helper, the history of delivery. 7) The score of child-rearing attitude was significantly difference according to the level of education and the birth weight of newborn. Conclusion: When the newborn care giver in the postpartum care setting is teaching the method of infant care to mother, there should be in consideration of the rearing experience of mothers. Mother's perception of the newborn, caring-confidence, and child-rearing attitude should be considered to develop the effective education program for mothers who have newborn. And its educational contents must be focused on the promotion of trust between infant and mother.

• The Research Journal of the Costume Culture
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• v.14 no.3 s.62
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• pp.404-417
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• 2006

The purpose of this thesis, therefore, is to examine the shaping methods and the knitting drafts of sleeve cap in the knitwears which are currently used by the manufacturers; to study the curve forms of sleeves in knitwears by analyzing synthetically the results of investigating the problems of knit wear sleeves; to present the most suitable sleeve cap for the knitwears. As the studying methods, I collected the basic data from the working-level persons of knit wear manufacturers, examined the knitting draft in the knitwears, and from that, made three kinds of comparative experimental garments and one kind of research experimental one as 10G and 16G. In doing so, I showed the sleeve cap suitable for the knitwears with plain stitch after operating sensual evaluation with Liker's 5-point rating measure. The analysis of data was handled with statistics by using SPSS Ver. 12.0; the method of statistics was executed by Frequency Analysis, Trust Analysis, one-way ANOVA, and Duncan test according to each topic of the research. As the result of the sensual evaluation of the experimental garments produced from the study, the research experimental garment looks better than the comparative experimental one in both 10G and l6G; has less extra folds around the front part of sleeve cap; looks more natural in sleeve caps of the body part and of a sleeve. From this, I am able to figure out that the research experimental garment looks better than the comparative experimental one produced by knit wear manufacturers. In addition, I can come to know that the different knitting of the front line and the back one of armhole in the knitwears has a favorable impact on improving the appearance of a sleeve.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.6 no.1
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• pp.130-140
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• 1999

This study was designated to investigate communication barriers of nurses in clinical settings. This study was done in 2 phases, first content analysis on descriptions of 50 nurses in three general hospitals and 40 nursing students on communication barriers for nurses in clinical settings, and second a survey to investigate the factors related to communication barriers and the relation between the nurse's characteristics and the extent of communication barriers in clinical settings from two nurses educators, 13 nursing students who experienced clinical practice and 71 nurses in 11 general hospitals. The results are as follows : 1. Through content analysis, 11 properties of communication barriers for nurses in clinical settings were identified. These were inappropriate communication style as a nurse, lack of professionalism, in appropriate control of emotions, lack of knowledge about the clincal setting, the lack of preparation about content of communication, the problem in trust relation, differences in priorities in needs, uncontroleable situation for nurses, inappropriate nurses' perception about patients, conflict with medical team and inadequate systematic support were identified and grouped in to four categories, communicator, message, feed-back and communication context. 2. The four factors in communication barriers for nurses in the clinical setting were identified and named as ambiguity in the nurses' position, lack of confidence, difference in perspectives with patients and in-adequate nurse-patient relationship. 3. There was a significant difference(F=5.31, P=0.0022, F=3.62, P=0.0316, F=2.80, P=0.067, F=9.01, P=0.0003) among the groups according to work place in rating the extent of the communication barrier in the clinical setting and in the four factors, the nurses working in the psychiatric patient unit rated the communication barrier in the clinical setting lowest among the groups. There was a significant negative correlation between the length of the nurses's carrier and the extent of communication barrier in three factors, ambiguity in the nurses' position, lack of confidence and inadequate nurse-patient relationship.