• 대한가정학회지
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• 제33권5호
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• pp.129-142
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• 1995

The purpose of his research was to identify the time use of the middle aged apartment-residents in Seoul as a part of collaborative study of family life issues of them. The data were collected from 307 fulltime housewives with at least one child in a middle or high school. Data were analysed by means of the statistics of mean, frequency, Pearson's correlation, ANOVA and Multiple Regression, using a SPSS/PC+ program. The major findings of this research were as follows : Husbands and middle or high school children do much work or study, while housewives do housework about 6 hours a weekday. Much housewives don't manage their time use. Housewives have much leisure time and the in main Leisure activity is TV watching. Much of them don't satisfied with their leisure life. Satisfaction with time use of housewives are related to life satisfaction, and effected by time management and active leisure participation. Most of housewives don't satisfied with their time use.

• 항공우주시스템공학회지
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• 제10권1호
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• pp.51-58
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• 2016

In this paper, we present some results on No-failure accelerated life test of aerial vehicle for reliability demonstration. The design of general accelerated life test consists of the three phases: 1) Estimating normal life test time of a single product from Weibull distribution model; 2) Determining the acceleration factor (AF) by utilizing the relation between the life of mechanical components and the applied torque; 3) Calculating the accelerated life test time, which comes from dividing the estimated normal life test time into AF. Then, we applied the calculated life test time to the real reliability test of the flap actuating system, while considering the requirement specification for mechanical components and operating environment of the actuation system. Real experimental processes and results are presented to validate the theory.

• Asian Pacific Journal of Cancer Prevention
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• 제15권10호
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• pp.4307-4309
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• 2014

Purpose: To calculate the probability of one person's life-time death caused by a malignant tumor and provide theoretical basis for cancer prevention. Materials and Methods: The probability of one person's death caused by a tumor was calculated by a probability additive formula and based on an abridged life table. All data for age-specific mortality were from the third retrospective investigation of death cause in China. Results: The probability of one person's death caused by malignant tumor was 18.7% calculated by the probability additive formula. On the same way, the life-time death probability caused by lung cancer, gastric cancer, liver cancer, esophageal cancer, colorectal and anal cancer were 4.47%, 3.62%, 3.25%, 2.25%, 1.11%, respectively. Conclusions: Malignant tumor is still the main cause of death in one's life time and the most common causes of cancer death were lung, gastric, liver, esophageal, colorectal and anal cancers. Targeted forms of cancer prevention and treatment strategies should be worked out to improve people's health and prolong life in China. The probability additive formula is a more scientific and objective method to calculate the probability of one person's life-time death than cumulative death probability.

• Human Ecology Research
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• 제51권4호
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• pp.371-382
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• 2013

The purpose of this study is to investigate children's emotional problems (attention problem, aggression, somatic symptom, social withdrawal, depression) and to examine the relationship between children's emotional problems with family characteristics (parent education, parent job, family income), life-styles (gaming times, TV times, sleep time). The sample was 2,140 collections of second grade children and their parents who participated in Korea Youth Panel Survey on 2011. We analyzed the data which were collected by means of questionnaires and the data were analyzed with t -test, ANOVA, Pearson correlation analysis, and regression analysis with SPSS ver. 19.0. The results were summarized as follows. The level of children's emotional problem was relatively low on average. There is a significant difference in the children's emotional problems according to family characteristics and life-styles. There was a relationship between children's emotional problems (attention problem, aggression, somatic symptom, social withdrawal, depression) and life-styles (gaming times, TV times). The significant factors influencing the children's emotional problems are connected with father's education, mother's job, family income, family characteristics, gaming time and TV time of life style. It is noted that parent education level was an important factor for children's attention problem and aggression. Amongst children's life-styles, gaming time and TV time are negative factors for social withdrawal and depression.

• 한국주거학회논문집
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• 제16권5호
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• pp.67-74
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• 2005

The performance of building should be deteriorated with time while the building would maintain and manage the function and performance to get a living condition. For the efficient maintenance of the building, the repair cycle would be provided and applied during the service-life time. The service-life time of the building components would be needed to determine the repair time and the repair scope. The service-life time of the building components would be calculated with the 1st repair time and the recovery rate of the performance, considering the recovery rate after repaired. In this paper, the 1st repair time would be estimated with the normal probability distribution, choice probability and 3rd quadratic function. The recovery rate of the building components assumes various level according to the research target and utility area. The results of this study are as follows ; first, most of the components of the building work would range about 30 years in the service-life time and the components of the mechanical works range from 28 years to 37 years, those of the electrical works would be about 31 years.

• 수산해양교육연구
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• 제27권1호
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• pp.203-217
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• 2015

The purpose of the study is to explore leisure time use of older adults and find out relationships between active/passive leisure activities and socioeconomic backgrounds in order to prepare later life for homo hundred. The subjects were 336 adults aged 50 and over in Busan city, Korea. Results are as follows. First, the subjects spent more time in active leisure than passive. But ratio of passive leisure time is getting higher with age. Second, cognitive activities changed from reading, computing, internet to hobbies, card games with age. Third, participation of active leisure activities are related to age and socioeconomic backgrounds. From this study, lifelong education including leisure education should support older adults to redesign their later life for homo hundred. Second, leisure education should focus on increasing the ability of accepting and utilizing leisure opportunities for older adults. Third, the role of lifelong educator should be emphasized to involve education field more actively. Forth, lifelong education institutions should have the knowledge of the purposes and motivations of older adults who participate in order to provide proper programs continuously. The connection between lifelong education and leisure time use and activities would lead later life with the quality of life and active aging.

• 한국국방경영분석학회지
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• 제37권1호
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• pp.39-48
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• 2011

야전에 저장된 탄약의 수명을 예측하는 것은 군의 전투지원 핵심요소로 실무적으로 매우 중요한 의미가 있다. 본 연구는 6년간 수행한 155mm 추진장약(KD541)의 ASRP(Ammunition Stockpile Reliability Program : 저장탄약신뢰성평가) 결과를 기초로 추진장약 추진제의 안정제함량 변화에 따른 시계열분석 (ARIMA 모델) 방법론을 적용 저장탄약수명을 예측하였다. 이번 연구는 기존의 회귀분석 모델을 활용한 연구방법과 다르게 시계열분석을 적용하되 미니 탭 프로그램을 활용하여 시계열분석을 적용 저장탄약수명을 예측하였다. 이러한 분석결과 155mm 추진장약(KD541) 저장수명은 35~43년으로 예측되었다.

• 한국자동차공학회논문집
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• 제9권6호
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• pp.135-142
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• 2001

The effect of tensile hold time on the creep-fatigue interaction in AISI 316 stainless steel was investigated. To study the fatigue characteristics of the material, strain controlled low cycle fatigue(LCF) tests were carried out under the continuous triangular waveshape with three different total strain ranges of 1.0%, 1.5% and 2.0%. To study the creep-fatigue interaction, 5min., 10min., and 30min. of tensile hold times were applied to the continuous triangular waveshape with the same three total strain ranges. The creep-fatigue life was found to be the longest when the 5min. tensile hold time was applied and was the shortest when the 30min. tensile hold time was applied. The cause fur the shortest creep-fatigue life under the 30min. tensile hold time is believed to be the effect of the increased creep damage per cycle as the hold time increases. The creep-fatigue life prediction using artificial neural network(ANN) showed closer prediction values to the experimental values than by the modified Coffin-Manson method.

• 영재교육연구
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• 제23권3호
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• pp.315-333
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• 2013

본 연구의 목적은 영재학생과 일반학생의 시간관리 행동과 생활만족도를 조사하고 시간관리 행동과 생활만족도의 관계를 조사하는 것이다. 이를 위하여 경기도 소재 영재학급 중학생 104명과 중학교 일반학생 203명을 대상으로 설문조사를 실시하고 자료를 분석하였다. 본 연구에서 얻어진 결과는 다음과 같다. 첫째, 영재학생과 일반학생의 시간관리 행동은 유의미한 차이를 나타내었다. 영재학생의 시간관리 행동이 일반학생보다 유의미하게 높았다(p<.05). 영재학생은 성별에 따른 시간관리 행동에 유의미한 차이가 나타나지 않았다. 그러나 일반학생은 성별에 따라 유의미한 차이를 보였으며 여학생이 남학생보다 시간관리를 잘하는 것으로 나타났다. 이원변량분석 결과 집단과 성별 간에 유의미한 상호작용효과는 나타나지 않았다(p>.05). 둘째, 영재학생과 일반학생의 생활만족도에는 유의미한 차이가 나타났고, 영재학생이 일반학생보다 생활만족도가 유의미하게 높았다(p<.05). 영재학생과 일반학생 모두 성별에 따라 생활만족도에 유의미한 차이가 나타나지 않았으며 집단과 성별 간 상호작용 효과가 유의미하지 않았다(p>.05). 셋째, 일반학생과 영재학생의 시간관리 행동과 생활만족도 간의 상관관계를 조사한 결과 두 집단 모두에서 시간관리 행동과 생활만족도 간에 유의미한 정적 상관관계가 있음을 밝혔다. 시간관리 행동이 생활만족도에 미치는 영향을 알아보기 위하여 회귀분석을 실시한 결과 시간관리 행동이 생활만족도에 유의미하게 영향을 미친다는 결과를 얻었다.

• 한국콘텐츠학회논문지
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• 제22권10호
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• pp.114-131
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• 2022

SNS를 통한 정부 중앙 부처 및 공공기관의 효과적인 대국민 소통이 나날이 중요해지는 현 시점에서 본 연구는 이들 기관 임직원의 시간관과 삶의 만족도가 기관 운영 SNS 태도 및 구전효과에 미치는 영향에 대해 살펴 보았다. 본 연구는 총 136명의 현직 임직원을 대상으로 온라인 설문을 실시하였다. 주요 분석 결과로 과거긍정적, 현재쾌락적, 미래지향적 시간관은 삶의 만족도와 기관 SNS 태도에 정적인 영향을 미친 것으로 나타났다. 한편 과거부정적 시간관은 삶의 만족도에만 부적 영향을 미쳤으며, 현재운명론적 시간관은 삶의 만족도와 SNS 태도에 부적 영향을 미치지 않는 것으로 나타났다. 끝으로 삶의 만족도는 기관 SNS 태도를 통해 구전효과에 순차적으로 정적 영향을 주는 것으로 밝혀졌다. 본 연구는 정부 중앙 부처 및 공공기관 임직원의 시간관 및 삶의 만족도가 기관 SNS 태도 및 구전효과 인식에 어떤 영향을 미치는지 밝힘으로써 대국민 소통 및 내부 커뮤니케이션의 효과성 제고를 위한 이론적, 실무적 함의를 제공할 것이다.