• 한국생활과학회지
• /
• 제17권6호
• /
• pp.1105-1114
• /
• 2008

The purpose of this study was to investigate the influence of income and emotional closeness with father/mother on middle and high school-adolescent's alienation The subjects were 327 middle and high school students who lived with two-parent in Keoungbok and whose household income was lower \4,000,000. The data were analyzed by t-test, ANOVA, Pearson's correlation, and stepwise multiple regression(using SPSS 12.1). Major findings were as follows: 1) Middle and high school students's alienation was difference. The level of the high school adolescent's alienation was higher than the middle school adolescent's alienation. 2) Middle and high school students's alienation was differed by level of income and emotional closeness with father/mother. The lower level of income and emotional closeness with father/mother, the higher level of adolescent's alienation. 3) Among the income, emotional closeness with father/mother, the income was more influential predictor on high school-adolescent's alienation. But the income was not a significant predictor of middle school-adolescent's alienation. emotional closeness with father was more influential predictor on middle school-adolescent's alienation.

• 산업기술연구
• /
• 제36권
• /
• pp.89-92
• /
• 2016

In this paper, we propose an efficient anonymity algorithm for personal information protections in big data systems. Firstly, we briefly introduce fundamental algorithms of k-anonymity, l-diversity, t-closeness. And then we propose an anonymity algorithm using controlling the size of anonymity groups as well as exchanging the data tuple between anonymity groups. Finally, we demonstrate an example on which proposed algorithm applied. The proposed scheme gave an efficient and simple algorithms for the processing of a big amount of data.

• 정보보호학회논문지
• /
• 제25권3호
• /
• pp.493-500
• /
• 2015

정부 3.0 공공정보 공유 및 개방, 소셜네트워크서비스의 활성화 그리고 사용자 간의 공유 데이터 증가로 인터넷상에 노출되는 사용자의 개인 정보가 증가하고 있다. 이에 따라 프라이버시를 지키기 위한 익명화 알고리즘이 등장하였으며 관계형 데이터베이스에서의 익명화 알고리즘은 k-익명성(k-anonymity)을 시작으로 ${\ell}$-다양성(${\ell}$-diversity), t-밀집성(t-closeness)으로 발전하였다. 익명화 알고리즘의 성능 향상 부분은 계속해서 효율적인 방법이 제안되고 있지만, 기업이나 공공기관에서는 알고리즘 성능의 향상보다는 전체적인 익명화 처리 방법이 필요한 실정이다. 본 논문에서는 관계형 데이터베이스에서 데이터의 그룹화를 이용하여 k-익명성, ${\ell}$-다양성, t-밀집성 알고리즘을 처리하는 과정을 구체화하였다.

• 정보보호학회논문지
• /
• 제21권5호
• /
• pp.149-160
• /
• 2011

익명화 기법은 마이크로 데이터에서 프라이버시를 보호하기 위해 제안된 방법 중의 하나이다. 원본 데이터로부터 그룹화를 기반으로 프라이버시를 확보하고자 하는 익명화 기법은 ${\kappa}$-익명성 (${\kappa}$-anonymity) 개념을 효시로 하여 ${\ell}$-다양성(${\ell}$-diversity), t-밀접성(t-closeness) 등의 개념이 차례로 제안되면서 발전된 모습을 보여주였다. 프라이버시측도 관점에서 각각의 익명성 관련 개념들이 상호 보완적인 관계에 놓여 있으나, 데이터의 유용성과 익명성 개념들을 복합적으로 고려한 실질적인 익명화 알고리즘 개발에 관한 연구는 아직까지 미진한 상태이다. 본 논문에서는 먼저 기존에 발표된 익명성 개념들에 기반한 익명성 측도들과 정확성 관련 측도들에 대하여 비교 분석한다. 또한,${\kappa}$-익명성을 만족하는 데이터로부터 블록 합병 방법에 의하여 ${\ell}$-다양성을 확보하는 알고리즘을 새롭게 제안한다.

• 중환자간호학회지
• /
• 제12권2호
• /
• pp.39-49
• /
• 2019

Purpose : The purpose of this study was to identify the extent to which intensive care unit (ICU) nurses' perceptions of life-sustaining treatment decisions and "a good death" affect attitudes toward terminal care. Method : Participants included 109 ICU nurses from three university hospitals. Data were collected using structured questionnaires, and collected data were analyzed using a t-test, ANOVA, the $Scheff{\acute{e}}$ test, Pearson correlation coefficients, and a multiple regression analysis (SPSS 24.0 program). Results : Perceptions of life-sustaining treatment decisions and a sense of closeness (a constituent for the awareness of "a good death") were positively correlated with terminal care attitudes. The factors affecting terminal care attitudes were a clinical career in ICU (${\beta}=.20$, p =.035), a sense of closeness(${\beta}=.19$, p =.041), and the perception of a life-sustaining treatment decision (${\beta}=.22$, p =.017). This finding indicates that more than 10 years of experience in ICU, a greater sense of closeness, and a higher view of life-sustaining treatment decisions results in more positive attitudes toward terminal care. The explanatory power of these variables on terminal care attitudes was 14% (F=6.84, p < .001, Adj $R^2=.140$). Conclusion : A sense of closeness and the perception of life-sustaining treatment decisions were identified as the factors affecting terminal care attitudes. Thus, various programs must be developed to raise awareness among ICU nurses of "a good death" and perceptions of life-sustaining treatment decisions.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2006년도 추계학술대회논문집
• /
• pp.248-251
• /
• 2006

This paper provides the basic theory and numerical results of shell design optimization considering the appearance of close natural frequencies in optimization process. In this study the fundamental natural frequency to be maximized is considered as the objective function and the initial volume of structures is used as the constraint function. In addition, the constraints related to natural frequency is also adopted to avoid the natural frequency closeness phenomenon during the optimization iteration. The Coon's patch is used to represent the shape and thickness distribution of shells. A degenerated shell finite element is adopted to calculate the fundamental natural frequency of the shells. The SQP available in the optimizer DoT is used to search optimum solution. From numerical results, the introduction of the frequency constraint into shell design optimization can deeply affect on the final optimum shape of shells although it is likely to be used to avoid the frequency closeness phenomenon.

• 한국생활과학회지
• /
• 제22권3호
• /
• pp.391-404
• /
• 2013

This study examined the moderating role of teacher-child relationship on the relation between children's problem behavior and peer victimization. Participants were 198 children(97 boys, 101 girls; recruited from classes with 5-6 year olds) and their kindergarten teachers. The teachers completed the rating scales to measure the children's peer victimization, problem behavior and teacher-child relationship. The collected data were analyzed using descriptive statistics, t-tests, correlations, and hierarchical multiple regressions. Boys and girls were analyzed separately. Results showed that children's problem behavior had positive relation to their peer victimization. Teacher-child relationship significantly related to children's peer victimization. Hierarchical regression analysis indicated that the interaction of boys' withdrawal behavior and teacher-child closeness predicted boy's peer victimization. Boys' withdrawal behavior, whose teachers demonstrated the lowest level of teacher-child closeness, associated significantly with their peer victimization. Boys' withdrawal and aggressive behavior had significant relation to their peer victimization, especially for the highest level of teacher-child conflictual relationship. Findings suggested the importance of teacher-child relationship in the context of intervention planning for peer victimization.

• 한국정보과학회논문지:소프트웨어및응용
• /
• 제30권7_8호
• /
• pp.681-686
• /
• 2003

본 논문은 단락의 자동 구분을 통해 중요한 문장을 추출하는 요약 시스템을 제안한다. 먼저 어휘의 재출현 여부를 파악하여 어휘의 일치도와 어휘의 역할 변화와 같은 재출현 어휘의 양상 정보를 수집하고, 이를 통하여 문장 간의 긴밀도를 정량적으로 계산한다. 다음으로 측정된 문장간 긴밀도를 이용하여 사용자의 추출 범위에 따라 단락을 구분하고, 각 단락의 대표 문장을 선정하여 최종 요약문을 추출한다. 제안한 방법은 문서 제목, 문장의 위치, 수사 구조 등의 정보를 이용하지 않기 때문에 수사 구조가 자주 발견되지 않는 문서에도 적용이 가능하다.

• 아동학회지
• /
• 제15권2호
• /
• pp.181-193
• /
• 1994

The purpose of this research was to study differences between reciprocal and unidirectional friendships and to examine evidence on whether certain constituents of friendship can predict the termination of friendships. A total 375 subjects- 190 elementary and 185 middle school children in Pusan- were administered questionnaires two times at an interval of 3 months. Frequency, factor-analysis, t-test, discriminant-analysis, and cross classification analysis were applied for data analysis. The results of the study were as follows: 1) The different constituents of reciprocal and unidirectional friendships were statistically significant. That is, children in reciprocal friendships perceived their relationships more positively, felt closeness more strongly, and evaluated their friend more highly than the children in unidirectional friendships. 2) The termination of reciprocal friendships was predicted by the constituents of friendship. The most powerful predictor was the degree of closeness and the second powerful predictor was the degree of commitment to the relationship and the 3rd powerful predictor was perceived characteristics of the friend. The last powerful predictor was perceived characteristics of the relations. 3) There were no sex differences in the rate of termination of reciprocal relationships. 4) There were age differences in the rate of friendship termination of reciprocal relationships. That is, the rate of termination of reciprocal relationships among older children was higher than among younger children.

• 한국방송∙미디어공학회:학술대회논문집
• /
• 한국방송공학회 2011년도 추계학술대회
• /
• pp.366-368
• /
• 2011

In this paper, we introduce a new kind of expressions for privacy protection techniques in database, such as K-anonymity L-diversity and t-closeness. With such kind of expressions, we provide a new way to solve the privacy protection problems, such as Linear programming, Non-linear programming, Integer programming and so on. Also most of the heuristic techniques are also efficient to be adopted under the expressions given.