• 한국군사과학기술학회지
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• 제13권4호
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• pp.577-585
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• 2010

The Military Tactical Communication technology for effective network-centric warfare is developing. Targeting broadband wireless transmission, core technology for connection, and Transmission technology that secure survivability under High-speed Movement environment. On the one hand, Tactical data communication system that reflects military characteristic is developing on the base of Legacy communication equipment which is used in the field. Because almost every military units in the field have used voice to communicate which lower efficiency of operation, they have made effort to Substitute voice communication which delays military Operation Tempo to digital communication. The Communications environment of troops in Forward edge of battle field area is very poor. Especially in terms of limited frequency allocation and bandwidth. Therefore, improving the efficiency of frequency is essential for Military Tactical Communication. This paper is about The Data Compression Method for increase of Efficiency in Tactical Data Communication over Legacy Radios which are UHF, VHF, HF Radio. I proposed and proved the most efficient Data Compression Method that reflects military characteristic, after analyzing the experimentation, which simulate CAS(Close Air Support mission) data transmission between Pilot and TACP.

• Structural Engineering and Mechanics
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• 제82권3호
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• pp.325-341
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• 2022

Previous major earthquakes indicated that the earthquake induced ground motions are typical non-stationary processes, which are non-stationary in both amplification and frequency. For the convenience of aseismic design and analysis, it usually assumes that the ground motions at structural supports are stationary processes. The development of time-frequency analysis technique makes it possible to evaluate the non-stationary responses of engineering structures subjected to non-stationary inputs, which is more general and realistic than the analysis method commonly used in engineering. In this paper, the wavelet-based stochastic vibration analysis methodology is adopted to calculate the non-stationary responses of multi-support structures. For comparison, the stationary response based on the standard random vibration method is also investigated. A frame structure and a two-span bridge are analyzed. The effects of non-stationary spatial ground motion and local site conditions are considered, and the influence of structural property on the structural responses are also considered. The analytical results demonstrate that the non-stationary spatial ground motions have significant influence on the response of multi-support structures.

• 한국가스학회지
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• 제18권5호
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• pp.6-11
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• 2014

차량용 LNG 연료 용기의 내진동 단열 지지구조 최적화 설계 개발을 위하여 종래의 해외특허구조 설계를 기본으로 한 특성요인도 분석으로 용기의 내조 및 외조 지지부 구조설계의 주요 설계 인자를 도출하였다. 도출된 설계인자 중에서 우선적으로 지지 봉재의 직경과 단열 격판 연결부 곡률을 대상으로 하여 최적화를 수행하였다. 차량용 LNG 연료 용기 설계안에 대한 평가를 위해 설계안을 MSC/MARC 상용유한 요소해석 패키지를 활용하여 유한요소 모델링하여 진동모드해석과 열전달 및 열응력해석을 수행하였다. 최적화 설계 결과를 통하여 도출된 설계안은 고유진동해석을 통한 1차 모드 고유진동수(1st Mode Natural Frequency), 열전달해석을 통한 초저온 용기 내조 외조간 지지부를 통한 총전열량 및 열응력해석을 통한 최대 Von-Mises 응력이 모두 설계 목표치를 만족하였으며, 개발된 설계안에 따라 차량용 LNG 연료 용기의 제작하여 3차원 진동 시험과 단열성능 시험을 통해 설계를 검증하였다.

• 한국학교ㆍ지역보건교육학회지
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• 제23권1호
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• pp.17-27
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• 2022

Objectives: This longitudinal study was done to identify the relationship of school adjustment and sponsor support or future time perspective and the differences of these 3 variables between 1st and 2nd survey of children having Didimseed account in institutional care. Methods: Participants were 25 elementary fourth to sixth grade children who are living on one facility that located in G. metropolitan area at 1st survey and 2nd survey was done at five-year intervals. Data were collected from September 2012 to September 2017 and were analyzed using t-test, paired t-test, ANOVA, post-hoc test and Pearson's correlation coefficients. Results: The level of school adjustment knowledge was not different significantly according to grade, gender and admission period at 1st survey. At 2nd survey, the level of school adjustment was different significantly according to grade only. The level of school adjustment was associated with positive future time perspective(r=.74) and negative future time perspective(r=-.54) at 1st survey, and that was associated with negative future time perspective(r=-.49) and meeting frequency of sponsor(r=-.43) at 2nd survey. There were not significantly different school adjustment and future time perspective variables between both surveys. But meeting frequency of sponsor at 2nd survey was lower significantly than that at 1st survey. Conclusions: Based on the results of this study, it would be necessary to prepare the policies that could have their positive future time perspective to increase school adjustment of institutionalized children. Also the effective strategies to increase not only Didimseed account support but emotional support through qualified meeting with sponsors should be developed.

• 한국학교ㆍ지역보건교육학회지
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• 제13권3호
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• pp.43-56
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• 2012

Objectives: The main purpose of this study was to examine factors influencing depression of middle school students in relation to coping behavior, social support, and self-esteem. Methods: The questionnaire survey was carried out on a convenience sample of 442 middle school students. The data analysis procedure included frequency, t-test, ANOVA, Pearson correlation coefficients, and stepwise multiple regression using depression as the dependent variable. Results: The prevalence of depression was 16.7%. Multiple regression revealed that the factors such as "negative" coping(${\beta}$=.29, p<.001), friend support(${\beta}$=-.23, p<.001), "social support pursuing" coping(${\beta}$=-.22, p<.001), school record(${\beta}$=.15, p<.001), self-esteem(${\beta}$=-.13, p<.01), family support(${\beta}$=-.13, p<.01), "agressive" coping(${\beta}$=.11, p<.01) turned out to be significant affecting factors. Forty six percent of varience in depression was explained by these factors. Conclusion: The results of this study suggest that to prevent the occurrence of depression, psychosocial aspects including emotional support should be considered when developing mental health education program for middle school students.

• 산경연구논집
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• 제10권2호
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• pp.25-37
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• 2019

Purpose - The goal of this study is to analyze the differences in education performances between students of the government's financial support program and those who do not receive support at a local university in Korea. Research design, data, and methodology - The questionnaire used was NASEL. NASEL is considered a highly suitable survey tool for professors, courses, and performances in Korean universities. The 290 students who participated and 44 students do not participate in the financial support program were surveyed for 10 days. The characteristics of students were investigated by frequency analysis and technical statistics. The analysis of student collective characteristics used independent t and f-tests,and one-way ANOVA with IBM SPSS Statistics 22.0 for statistical purposes. Results - The p-value of the group receiving financial support and the group without financial support in active-collaborative learning is 0.167. The p-value of the economically supported group and the non-supported group of the faculty-student interaction is 0.281. The confidence coefficient of the active-collaborative learning questionnaire is 0.861. The reliability coefficient of the questionnaire for the faculty-student interaction questionnaire is 0.871. Conclusions - There are no clear differences in active-collaborative learning and faculty-student interaction between participating and non-participating students in the economic program.

• 아동학회지
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• 제16권1호
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• pp.197-210
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• 1995

The purpose of this study was to investigate the relationship between social support and perception of self-confidence in children by grade, sex, and other related variables. The subjects were 136 third-graders, 143 sixth-graders, and 161 eighth-graders in public schools located in Pusan. Instruments were Harter's Self-Perception Profile for Children and the Social Support Appraisal Scale (SSAS). The SSAS is a 31-item measure that taps children's perception of family, peer, and teacher support. The data were analyzed by frequency, percentile, ANOVA, Scheffe test, Pearson's correlation, and multiple regression. The main results showed that (1) children in 6th and 8th grades perceived higher peer support than children in 3rd grade, (2) except for social acceptance, the children in higher grades perceived themselves lower in self-competence than the children in lower grades, (3) there was a positive relationship between children's perception of self-competence and social support, and (4) the variables which influenced children's self-perception were, in descending order: socioeconomic status(${\beta}=.52$), age(${\beta}=.21$), social support(${\beta}=.10$). These three variables explained 38% of the children' self-perception.

• 한국간호교육학회지
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• 제9권1호
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• pp.126-135
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• 2003

Purpose: The purposes of this study are as follows: Identifying the types of bullying; describing the relationship among social support, parent-adolescent communication and bullying types; identifying factors influencing the bullying. Method: 374 subjects were 5-6th grade students of two elementary schools in Daejeon. We collected the data from June 10 to October 29, 2002. The data were analyzed by using the frequency, ANOVA, pearson's correlation and stepwise multiple regression in the SPSS. Result: The 7 % of the subjects were found as bullies and another 23.8 % as victims, while 25.9 % were found as bully-victim group. The number of the victims in peer-support got less than in the normal or bully group. In the correlation analysis, the score of bullies, victims and bully-victim group were reversely-correlated with the social support. The score of victims was reversely-correlated with the mother-adolescent communication. In regression analysis, the social support influenced significant effects on both the bullies and victims. Conclusion: Findings indicated that the health professionals need to identify social support and parent-adolescent communication according to bullying types. Therefore, adequate approaches for the three independent groups of bullying are necessary.

• 종양간호연구
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• 제11권1호
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• pp.41-48
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• 2011

Purpose: The study was to identify relationships between the family support, perceived health status and self esteem in Korean women with breast cancer. Methods: Data were collected by questionnaires from 214 women with breast cancer in inpatient and outpatient settings at three different university hospitals and one cancer hospital in B city, Korea. The instruments included Family Support Scale, Perceived Health Status Scale, and Self Esteem Scale. The collected data were analyzed using frequency, percentage, t-test, ANOVA, Scheffe's test, and Pearson's correlation coefficients by SPSS WIN 15.0 program. Results: There were significant differences in the family support by age, education, and cost burden. There were significant differences in the perceived health status by education, occupation, economic status, pain, fatigue, and cancer insurance. There were significant differences in the self esteem by age, occupation, economic status, type of religion, pain, fatigue, and cancer insurance. Self-esteem was significantly correlated with family support and perceived health status. Conclusion: These results suggested that promoting perceived health status and enhancing family support would increase self-esteem effectively among Korean women with breast cancer.

• 대한물리치료과학회지
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• 제16권2호
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• pp.45-55
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• 2009

Background: This thesis aims at suggesting the direction for the introduction of public free treatment support system according to the establishment of [Special Education Law] and the right settlement of therapeutic support service. Method: It introduced the characteristics and the contents of school based PT & OT, diagnosis and evaluation, and operation method. It set up question items and presented intervention plan, and substantial intervention, beginning from the request of whole process. The diagnostic evaluation was described from 4 aspects, which are consideration matters in the time of document drawing and diagnostic evaluation, chiefly centering around SOAP. The flow of overall treatment support service, the allocation of 16 handicapped children for 1 therapist, and the weekly treatment frequency according to the treatment support location and environment were suggested in the concrete operation method. Result: The concrete method should be explored in order to provide handicapped students with requisite services, which are offered by various experts in the amended 'Special Education Law'. In addition, work condition and social welfare, which are equal to school teachers, should be provided for all experts. Conclusion: Along with these things, special education support center should establish the road-map for the education rehabilitation of the handicapped children from the evaluation of early diagnosis of the handicapped children to treatment support and lifelong education.