• The Korean Journal of Applied Statistics
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• v.35 no.1
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• pp.1-17
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• 2022

We propose a test of consistency for two differentially private histograms using parametric bootstrap. The test can be applied when the original raw histograms are not available but only the differentially private histograms and the privacy level α are available. We also extend the test for the case where the privacy levels are different for different histograms. The resident population data of Korea and U.S in year 2020 are used to demonstrate the efficacy of the proposed test procedure. The proposed test controls the type I error rate at the nominal level and has a high power, while a conventional test procedure fails. While the differential privacy framework formally controls the risk of privacy leakage, the utility of such framework is questionable. This work also suggests that the power of a carefully designed test may be a viable measure of utility.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.1
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• pp.281-290
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• 2017

This study aims to determine how demographic characteristics and SNS use traits of audiences are different depending on preferred performance types such as pop music concert, musical; play, dancing and ballet. SNS use traits are as follows: duration of SNS use, average number of access to SNS account, average time of SNS use, SNS activity type, motivation for SNS use, preferable type of SNS, annual total number of performance watched, and method to gain performance information. Also, the study was conducted to get significant insights in designing marketing strategy using social network services. The results are as follows. First, the result of examining audience's demographic factors depending on preferred performance type showed meaningful differences in sex, age, marital status, form of family, academic level, job and monthly income of the audiences. Second, SNS use traits of the audiences according to preferred performance genres vary in duration of SNS use, average number of access to SNS account, average time of SNS use, SNS activity type, motivation for SNS use, method to gain performance information. These findings showed that demographic characteristics and SNS use traits needed to be classified more specifically based on genres. Additionally, marketing strategy using performance information, traits of contents and customers' patterns through SNS should be specifically developed based on specified target.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.6 no.9
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• pp.59-70
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• 2016

The rapid development of the Chinese version of Twitter, the groom Weibo has become an important communication means for Chinese SNS users to obtain and share information. As a result, in China, the phenomenon of the power shift has emerged from the traditional opinion leaders to SNS opinion leasers. The relationship analysis of demographic variables of the Chinese SNS users and their Information on the relationship between keywords was made by utilizing the centrality analysis using Social Network Program NetMiner. China's SNS opinion leaders have general interest in daily activities with their families or friends rather than in social issues. And in case of SNS opinion leaders of high betweenness centrality, it was analyzed that general users was a key mediator role that organically out lead to the adjacent information. These properties are not independent of demographic variables, such as professional, therefore, the demographic characteristics of SNS opinion leaders showed a significant effect on the parameters of betweenness centrality. This study analyzed the characteristics of SNS users, especially opinion leaders in China by looking at the aspects of Chinese social phenomenon in terms of information. Through this study, we expect to provide basic information about the social characteristics of China through collective communication.

• Journal of the Korean Association of Geographic Information Studies
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• v.16 no.3
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• pp.40-53
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• 2013

Most of the existing domestic studies to identify the distribution of longevity population and influencing factors oriented confirmatory approach. Furthermore, most of the studies in this research topic simply have used their own definition of spatial unit of analysis or employed arbitrary spatial units of analysis according to data availability. These research approaches can not sufficiently reflect the spatial characteristic of longevity phenomenon and exposed to the Modifiable Aerial Unit Problem(MAUP). This research performed the Exploratory Spatial Data Analysis(ESDA) to identify the spatial autocorrelation of the distribution of longevity population and investigated whether the modifiable areal unit problem in the aspect of scale effect using spatial population data in Korea. We used Si_Gun_Gu and Eup_Myeon_Dong as two different spatial units of regional longevity indicators measured. Then, we applied Getis-Ord Gi* to investigate the existence of spatial hot spots and cold spots. The results from our analysis show that there exist statistically significant spatial autocorrelation and spatial hot spots and cold spots of regional longevity at both Si_Gun_Gu and Eup_Myeon_Dong levels. This result implies that the modifiable areal unit problem does exist in the studies of spatial patterns of longevity population distribution. The demand for longevity researches would be increased inevitably. In addition, there were apparent differences for the global spatial autocorrelation and local spatial cluster which calculated different spatial units such as Si_Gun_Gu and Eup_Myeon_Dong and this can be seen as scale effect of MAUP. The findings from our analysis show that any study in this topic can mislead results when the modifiable areal unit problem and spatial autocorrelation are not explicitly considered.

• Korean Security Journal
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• no.11
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• pp.183-201
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• 2006

In modern society, increasingly easier access to Internet makes people want higher and more advanced services. This trend, of course, appears in the field of Security System. This study which has been performed to prove the way service quality of Security System has an influence on customer satisfaction brought the following results. First, customer satisfaction depends on social demographic characteristics. In other words, each customer satisfaction to service quality makes a difference the way he/she gains information on available facility. Usually customers showed higher satisfaction when they accepted the information from other people. Second, customer satisfaction depends on service quality itself. The effort for improvement of work efficiency or service quality in both facility itself and surroundings can make more people use and recommend the Security System without cease.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.378-379
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• 2023

본 연구의 목적은 최근 증가하고 있는 고령 인구를 위해 여러 가지 요인을 고려하여 노인만을 대상으로 하는 여가 만족도를 산출하는 것이다. 노인의 여가 만족도에 영향을 주는 요인으로 '여가시설', '노인 인구', '노인 건강', '노인 소득'을 산정하였다. 해당 요인들에 가중치를 분배하여 산정하기 위한 방법으로 PCA와 선형회귀를 사용하였다. 위 과정을 통해 제작된 노인 여가 만족도 지표에 인자값을 투입하여 자치구별로 노인 여가 만족도 점수를 산출하였고, 스코어 카드를 통해 현황을 살펴보았다. 본 연구는 산출된 각 자치구별 여가 만족도 점수와 인자에 해당하는 점수를 파악하여, 여가만족도가 낮은 지역들의 취약 분야를 파악하고 취약 분야를 중점으로 여가 만족도를 개선해나갈 것을 제안한다.

• Proceedings of the Korean Society for Information Management Conference
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• 2010.08a
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• pp.139-146
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• 2010

대학에서 실행되고 있는 정보활용능력 교육에 따른 학습자의 정보활용능력에 대한 자가인식의 변화는 학습자의 특성에 따라 차이가 나타날 수 있다. 이에 본 연구에서는 정보활용능력 교육의 효과에 영향에 미치는 학습자의 영향 요인을 조사 분석하고자 하였다. 본 연구의 목적을 위해, D 대학의 한 학기 교양과목으로 개설되고 있는 정보활용능력 교육 프로그램을 대상으로 해당과목 수강생 47명의 정보활용능력에 대한 자가 인식을 교육전과 교육후의 질문지법을 통해 그 변화를 조사 분석하고 이들 학습자의 개인적인 특성을 파악하였다. 학습자의 특성에는 인구통계학적인 특성 이외에 유사 교육 프로그램 경험 유무, 도서관에 대한 인식 등이 조사되었다. 정보활용능력에 대한 자가 인식을 측정하기 위한 문항들은 ACRL의 고등 교육자를 위한 정보활용능력 평가기준을 참조하였고 사용된 분석도구는 Excel과 SPSS 17.0이다.

• Spatial Information Research
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• v.19 no.4
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• pp.1-10
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• 2011

This research examined relationships between Scientifically Estimated Environmental Risks (SEERs) of floods, hurricanes and hazardous material releases, and household characteristics. This research showed that there were no statistically significant relationships between most of the demographic characteristics (age, household size, tenure at the present home) and SEERs of the two natural hazards (a flood and a hurricane). These results support Drabek's findings (1986) that people tend to underestimate or ignore natural hazards in selecting their residence regardless of age, household size, and house tenure. Educational attainment and yearly household income were positively correlated with hurricane risk, but not with flood risk. By contrast, SEER of hazardous materials was correlated with all demographic characteristics mentioned above. This result may show that those who are relatively poorer and have lower educational level tend to be limited to living in communities more vulnerable to human-made risk.

• The Journal of the Korea Contents Association
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• v.10 no.9
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• pp.399-409
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• 2010

The purpose of this study was to examine the effect of sport enjoyment on leisure identity and ski participation. To collect data, the purposive sampling method was used. The collected 256 samples of advanced level skiers were analyzed using SPSS 12.0 program. Through statistical analysis, following results were extracted. First, some factors of sport enjoyment had differences in the mean score based on some demographical characteristics. However, leisure identity had no difference. The degree of ski participation had some differences in the mean score based on some demographical characteristics. Second, some factors of sport enjoyment influenced leisure identity. Third, some factors of sport enjoyment influenced the degree of ski participation. The results of this study are expected to be used for understanding advanced level skiers and satisfying the needs of advanced level skiers.

• Journal of the Korean Data and Information Science Society
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• v.16 no.4
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• pp.933-942
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• 2005

Recently, the decrease of the number of the third graders in a high-school have serious influences on the number of a limit matriculation of colleges and universities. The purpose of this paper is to forecast for the number of a high-school graduate until 2022 year in Daegu city as based on the resident registration population. As the based period of 2004, most college and universities in Daegu city have to reduce the 37.5% of the number of limit matriculation until 2022 year to equal the number of the third graders in a high-school.