• Korean Security Journal
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• no.38
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• pp.137-161
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• 2014

The aim of this study was to investigate the factors influencing on housebreaking victimization in South Korea. It is important that a resident, police officer, and policy makers use Routine activities/lifestyle theory in order to explore whether proximity and exposure to offenders or presence of guardianships affect the resident's risk of being victimized. In this context, the current study utilizes proximity variables: disorder of residence, exposure variables: hours of empty house and guardianship variables: social networks, security equipment. The study employs secondary data(Korean Crime Victim Survey in 2008) responses from a sample of 4, 710 resident. and Logistic regression analysis was used to examine whether the likelihoods of housebreaking victimization was associated with the measures of proximity and exposure and the lack of guardianship. The result of the study showed that proximity(disorder of residence) and guardianship (security equipment) are statistically significant predictors that is associated with an enhanced risk of school violence victimization while controlling for other variables. Further policy implications of the study will be discussed.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.28 no.4
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• pp.228-234
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• 2017

Objectives: The aim of this study was to investigate the clinical characteristics of aggressive behavior problems in children and adolescents with autism spectrum disorder (ASD). Methods: Children and adolescents with ASD, aged 6-18 years, were included in this study. We divided them into two groups according to the presence or absence of aggressive behavior. They were assessed using three scales, the Korean-Child Behavior Checklist (K-CBCL), Behavior Problem Inventory, and Social Communication Questionnaire, which were completed by their parents, who conducted a continuous performance test to evaluate their attention function. The statistical analysis was done using the Mann-Whitney U-test between the two groups at a p-value of 0.05. Results: A total of 17 children participated in this study. Ten children (7 boys, $12.4{\pm}4.27years$) were included in the group with aggressive behavior problems and 7 children (6 boys, $13.8{\pm}3.53years$) in the group without aggressive behavior problems. There were no significant differences in the age, gender or intelligence quotient of the two groups. The children with aggressive behavior problems showed a trend of higher T-scores in the attention problems and anxiety/depressed subscale of the CBLC (p<0.1). Conclusion: The results suggest that aggressive behavior problems in children with ASD may be related to their attention problems, anxiety and depression.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.2
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• pp.1049-1052
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• 2013

Background: Studies have shown that alterations of steroid hormone metabolism, particularly involving testosterone, affect the risk of prostate cancer. Therefore, genetic variation in genes of enzymes which are involved could be of importance. The gene most interest is CYP17, whose enzyme product has an essential role in testosterone hormone synthesis. Some studies have indicated that the A2 allele polymorphism of CYP17 associated with increased risk of prostate cancer that could be affected by ethnicity. Therefore, the aim of this study was determination of presence or absence of the A2 allele in patients with prostate cancer. Materials and Methods: We studied the association of A2 allele and prostate cancer among 74 patients with prostate cancer and 128 healthy men which were referred to hospitals of SBMU. Results: This study revealed a significant association between prostate cancer risk and the A2 allele in an Iranian population so that A1A2 and A2A2 genotypes were more common in cases than controls with P-values of 0.029 and 0.010, respectively. Conclusions: Results of our study support a possible role of the A2 allele in sporadic prostate cancer development in Iran, in line with findings elsewhere.

• The Journal of the Korea Contents Association
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• v.9 no.3
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• pp.345-352
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• 2009

The glass ceiling is defined as a barrier so subtle that it is transparent, that it prevents women and minorities from moving up in the management hierarchy. Individuals in the minority may perceive the presence of a glass ceiling within their social context, a barrier put in to place by those in the advantaged majority. This study has testified pragmatically the influence of glass ceiling perceived by the female employees of travel agency on their work attitudes(organizational commitment, turnover intention). Data were collected by 202 full time female employees. The results of analysis is as follows: First, it is revealed that glass ceiling has no influence on turnover intention. Second, this study show that the higher glass ceiling is perceived by the female employees of travel agency, the more they have negative influence on their affective commitment. Contrary to our expectation, however, it is revealed that glass ceiling has no influence on continuance commitment. That is, glass ceiling have significant effects on affective commitment whereas the effects are not significant for continuance commitment. Third, affective commitment have significant effects on turnover intention. However, it is revealed that continuance commitment has no influence on turnover intention.

• Asian-Australasian Journal of Animal Sciences
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• v.18 no.4
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• pp.463-469
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• 2005

An attempt was made to analyze the factors affecting mating performance of rams in pen mating systems. Due to many types of social interactions, mating performance of rams may decrease or increase. Six intact Muzaffarnagari rams were used and divided into three dominant subordinate pairs by food and ewe competition test. For dominant rams subordinate ram became competitor and vice versa. In the first experiment, ram was exposed to ewe but the competitor ram was kept outside the pen with the facility of visibility only. In the second experiment each ram was exposed to ewe along with the competitor ram and in third experiment ram was exposed to ewes (two) along with competitor ram in observation pen. Recordings of different mating and agonistic behaviour were done in all the experiments. It was found that subordinate ram's mating behaviour was inhibited by mere presence of a dominant ram out side without physical contact. However, when ram exposed to oestrus ewe(s) along with competitor ram, both dominant and subordinate rams spent much of their time in guarding activities instead of mating. In addition dominant ram tried to curtail the subordinate ram mating by agonistic interaction like fight and butting. Different guarding activities were observed either as active or passive type depending on level of dominanace. It was concluded that in a limited space the interaction of two or more rams might affect the number of services adversely.

• Journal of Preventive Medicine and Public Health
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• v.40 no.5
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• pp.337-344
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• 2007

Objectives: This study was performed to investigate the level of quality of life (QOL) and to identify its related factors among the elderly using a hall for the aged. Methods: The study subjects were 350 elderly people living in Nam Gu, Gwangju City. They were interviewed by questionnaire to collect information on social-demographic characteristics, health behaviors, health-related characteristics and QOL. We used statistical analysis methods such as T-test, ANOVA and multiple regression analysis to find which factors affected QOL. Results: The characteristics relating to physical functions were as follows: presence of spouse, education, alcohol drinking, teeth condition, arthritis, frequency of visiting the hall for the aged, and depression. Age, arthritis and depression were significantly related to role limitation due to physical problems. General health was related to gender, age, and depression, and vitality was related to education, frequency of visiting the hall, and depression. Role limitation due to emotional problems was related to age and depression, and mental health was related to age, hypertension, arthritis and depression. Conclusions: This study showed QOL of the elderly was significantly influenced by socio-demographic factors, and physical or emotional conditions. To improve QOL of the elderly, we need to develop programs to promote health and to manage chronic diseases of the elderly.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.4 no.6
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• pp.1311-1326
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• 2010

Peer-to-peer (P2P) networks consume the most bandwidth in the current Internet and file sharing accounts for the majority of the P2P traffic. Thus it is important for a P2P file sharing application to be efficient in bandwidth consumption. Bandwidth consumption as much as downloaded file sizes is inevitable, but those in file search and bad downloads, e.g. wrong, corrupted, or malicious file downloads, are overheads. In this paper, we target to reduce these overheads even in the presence of high volume of malicious users and their bad files. Sybil attacks are the example of such hostile environment. Sybil attacker creates a large number of identities (Sybil nodes) and unfairly influences the system. When a large portion of the system is subverted, either in terms of the number of users or the number of files shared in the system, the overheads due to the bad downloads rapidly increase. We propose ELiSyR, a file search protocol that can tolerate such a hostile environment. ELiSyR uses social networks for P2P file search and finds benign files in 71% of searches even when more than half of the users are malicious. Furthermore, ELiSyR provides similar success with less bandwidth than other general efforts against Sybil attacks. We compare our algorithm to SybilGuard, SybilLimit and EigenTrust in terms of bandwidth consumption and the likelihood of bad downloads. Our algorithm shows lower bandwidth consumption, similar chances of bad downloads and fairer distribution of computation loads than these general efforts. In return, our algorithm takes more rounds of search than them. However the time required for search is usually much less than the time required for downloads, so the delay in search is justifiable compared to the cost of bad downloads and subsequent re-search and downloads.

• Journal of Engineering Education Research
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• v.11 no.3
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• pp.78-89
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• 2008

This paper analyses the codes of ethics of eight engineering societies in USA and Korea focusing on fundamental canons, and major findings are as follows. Firstly, engineering societies in Korea began to make a code of ethics recent1y. Secondly, codes of ethics in USA have similar contents by mutual learning contrary to Korean cases. Thirdly, some codes of ethics in Korea are very poor and their presence are not well perceived. Fourthly, codes of ethics in Korea don't cover comprehensively responsibility to the public, to employers or clients, and to the profession. Fifthly, engineering societies in USA hold paramount the safety, health, and welfare of the public. Sixthly, new social issues including sustainable development are well discussed in the codes of ethics in USA.

• Physical Therapy Korea
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• v.15 no.1
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• pp.77-85
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• 2008

The self-report measure is a useful tool for evaluating self-recognized disability and difficulty in daily living activities. Although many studies and clinics used the Neck Pain and Disability Scale (NPDS) for measuring neck pain and functional impairment, there has not been much adaptation of this for use with Korean patients. The purpose of this study was to establish the reliability and validity of NPDS among Korean neck pain patients. Fifty-five subjects (32 males, 23 females) with neck pain enrolled in this study. They completed standardized self-administered questionnaires. The NPDS measures pain intensity; its interference with vocational, emotional, recreational, social, and functional aspects of living; and the presence and extent of associated factors. Reliability was determined by the intraclass correlation coefficient (ICC) and Cronbach's alpha for internal consistency. Validity was examined by correlating the NPDS scores to the Visual Analog Scale (VAS) score. The test-retest reliability of the translated versions of the NPDS was good ICC (2,1)=.86 (95%CI .76~.92). Cronbach's alpha value for NPDS was found to be .93, and this was statistically significant (p<.05). The criterion-related validity coefficient was .79 (p<.Oll. We conclude that the Korean version of NPDS has been shown to be a reliable and valid instrument for the assessment of neck pain. Successful linguistic and cultural translation will admit appropriate cross-cultural comparison for clinical analysis. Therefore, this study can be expected to be used as an adequate evaluation scale for neck pain related studies and treatments.

• Environmental and Resource Economics Review
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• v.19 no.3
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• pp.459-483
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• 2010

This paper constructs the two-part tax-a combined form of output tax and entrance fee-for polluting oligopolists under endogenous entry. In the presence of external damage that varies exogenously with aggregate output, we show that the two-part tax produces the ex post Pigouvian rule and thus achieves the first-best optimum. We also examine a detailed analysis of the impact of the two-part tax on social welfare and government revenues. Finally, when estimation errors exist in the process of regulation, we identify the incentive conflicts between interest groups and analyze the effects of estimation errors on determining optimal tax. In particular, we show that if the regulator takes care of both welfare loss and revenue gain under the proposed two-part tax, not only over-estimation on the slope of external damage but also under-estimation on the slope of market demand should be taken into the policy consideration.