• 한국안전학회지
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• 제10권4호
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• pp.68-74
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• 1995

This paper analyzes the behaviors of the membrane under drop impact loadings using the acoustic emission technique. The analysis is useful for evaluating the strength of the membrane as well as for studying its damping characterisics due to the corrugation and the ring knot. The membrane for LNG storage tank is basically composed linear and circular elements. Two membrane specimens have approximately same drop impact mass and same drop speed. Locan 320 system with piezoelectric sensor is used in the experimental measurement. Experimental results for the membranes indicated that AE siganls having higher energies were generated with increasing drop impact loadings. It was confirmed that the ring knot. membrane has high absorption of drop impact loadings in comparison with the flat membrane. These results are very important to reliable design and to improve the safey of the membrane components.

• 대한기계학회논문집
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• 제18권5호
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• pp.1144-1149
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• 1994

Damage caused in CFRP laminates by low energy impact of steel ball are investigated ultrasonically. Two types of laminated specimens having different stacking sequence are used as a target material. The effects of pre-bending on the behaviors of impact damage are specifically discussed. The initiation and progagation behaviors of delamination were largely dependent upon the bending rigidity of each specimen. Specimen C having higher bending rigidity produced larger delamination damage than the Specimen D having relatively low bending rigidity, however it was little for the Specimen C. Application of pre-bending increased the apparent bending rigidity of target during impacting, it produced delamination at lower impact energy level compared to the case of no preload.

• Computers and Concrete
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• 제4권1호
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• pp.19-32
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• 2007

This paper is concentrated on the behaviors of five different types of fiber reinforced concrete (FRC) in uniaxial tension and flexural impact. The complete stress-strain responses in tension were acquired through a systematic experimental program. It was found that the tensile peak strains of concrete with micro polyethylene (PEF) fiber are about 18-31% higher than that of matrix concrete, those for composite with macro polypropylene fiber is 40-83% higher than that of steel fiber reinforced concrete (SFRC). The fracture energy of composites with micro-fiber is 23-67% higher than that of matrix concrete; this for macro polypropylene fiber and steel fiber FRCs are about 150-210% and 270-320% larger than that of plain concrete respectively. Micro-fiber is more effective than macro-fiber for initial crack impact resistance; however, the failure impact resistance of macro-fiber is significantly larger than that of microfiber, especially macro-polypropylene-fiber.

• 대한가정학회지
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• 제43권2호
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• pp.41-55
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• 2005

The purpose of this study was to determine the effects of the father's experiences from his family-of-origin, marital conflict, and childrearing behaviors on his child's behavioral problems, as well as any differences due to the child's sex. The subjects were 837 days of 4th and 5th graders in six elementary schools and their fathers in Seoul and Pusan. The data were analyzed using the Structural Equation Modeling(SEM) to verify the theoretical models among the variables. The results showed that the pathways of the impact of the father's experiences from his family-of-origin differed, depending on the father-son group and the father-daughter group, upon the child's intermailizing and extenalizing behavioral problems through marital conflict and the father's childrearing behaviors. Firstly, in the father-son model, the father's experiences from his family-of-origin had an impact on the son's internalizing and extenalizing behavioral problems through marital conflict and the his negative childrearing behaviors. Secondly, the father-daughter model exhibited two pathways; the father's experiences from his family-of-origin had an impact on the child's internalizing and externalizing behavioral problems through his negative chilrearing behaviors, and the father's experiences from family-of-origin had an impact on the child's internalizing behavioral problems through marital conflict and his positive childrearing.

• 정보화정책
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• 제21권4호
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• pp.59-80
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• 2014

스마트폰에 대한 관심과 사용이 집중되면서 사용 범위 또한 점차 넓어져 공적 업무처리 이외에 사적 업무처리와 동시에 사회 연결망 확장에도 사용되고 있다. 최근 스마트폰의 다양한 기능들은 사용자로 하여금 스마트폰을 사용하면서 동시에 다른 활동도 함께하는 멀티태스킹 행동을 유발하며, 스마트폰 사용에 집중하고 몰입하여 결국 사용자가 스마트폰을 사용하지 않으면 불안해지는 중독현상까지 나타내고 있다. 이에 본 연구에서는 개인적 특성이 스마트폰의 멀티태스킹 행동에 어떠한 영향을 미치는지 파악하고자 하였으며, 멀티태스킹 행동, 만족, 몰입 및 중독 간에 미치는 영향 관계에 대해 알아보고자 하였다. 선행 연구를 바탕으로 개인 특성 요인을 복합시간성, 혁신성, 자기효능감으로 설정하고 이러한 요인이 멀티태스킹 행동에 미치는 영향과 멀티태스킹 행동, 만족, 몰입 및 중독에 미치는 영향을 살펴보았다. 연구결과, 스마트폰 사용자의 복합시간성은 멀티태스킹 행동에 영향을 주는 것으로 나타났으나, 혁신성과 자기 효능감은 멀티태스킹 행동에 영향을 주지 않는 것으로 나타났다. 또한, 멀티태스킹 행동은 만족, 몰입 및 중독에 모두 긍정적인 영향을 미치는 것으로 조사되었으며, 만족은 중독에 영향을 주지 않지만, 몰입에 긍정적인 영향을 주는 것으로 나타났다. 마지막으로 몰입은 중독에 긍정적인 영향을 미치는 것으로 나타났다. 따라서 사용자의 멀티태스킹 행동은 중독에 직접적으로, 또는 몰입을 통하여 간접적으로 영향을 미치고 있는 것으로 나타났다.

• 대한가정학회지
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• 제42권2호
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• pp.133-150
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• 2004

This study aimed to find the effect of parental experiences from the family-of-origin and childrearing behaviors on their children's behavioral problems, as well as if this path differed according to the child's gender. The subjects were 1247, 4/sup th/ and 5/sup th/ graders in eight elementary schools and their parents in Seoul, Pusan, and Daejon, Korea. The data were analyzed using the Structural Equation Modeling(SEM) to verify the theoretical models among the variables. The results showed differences between the father-child model and the mother-child model on the pathways of the impact of parental experiences from the family-of-origin upon the child's internalizing and externalizing behavioral problems through parental negative rejection and permission childrearing behaviors. Specifically, 1) the father-child model showed a gender difference on the pathways of the impact of the father's experiences from the family-of-origin upon the child's internalizing and externalizing behavioral problems through the father's rejection and permission childrearing behaviors; whereas, 2) The mother-child model showed no gender difference on the pathways of the impact of the mother's experiences from the family-of-origin upon the child's internalizing and externalizing behavioral problems through the mother's negative childrearing behaviors.

• 경영과정보연구
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• 제39권2호
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• pp.127-143
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• 2020

최근 무례한 고객에 의한 비이성적인 행동이 언론으로부터 자주 노출되면서 그 심각성이 사회적으로 이슈가 되고 있다. 서비스업의 경우 직무의 특성상 무례한 행동을 하는 고객과 자주 대면하여야 하며 상호작용하여야 하기에 이로 인한 종사원들의 스트레스는 매우 심각한 수준이다. 고객무례행동으로 인하여 종사원은 불쾌함, 우울함 등 부정적 감정을 느끼고 본인의 직업에 회의를 느껴 조직을 떠나려는 생각도 하게 된다. 이처럼 종사원의 서비스 제공에 직접적인 영향을 미친다는 점을 고려하면 고객무례에 관한 올바른 대처방안이 필요하다고 볼 수 있다. 이에 본 연구에서는 고객무례행동이 종사자의 감정부조화에 미치는 영향을 살펴보고 감정부조화가 직무스트레스에 미치는 영향과 직무스트레스가 조직일탈행동, 생활침해행동, 창의성에 미치는 영향을 살펴보았다. 또한, 직무스트레스를 보다 긍정적으로 관리할 방안을 마련하기 위하여 감정부조화와 직무스트레스의 관계에서 스트레스관리 교육의 조절효과를 살펴보았다. 자료 수집을 위해서 부산시 소재 종합병원, 중소병원의 고객 접점에서 업무를 수행하고 있는 의료서비스 종사자들을 대상으로 설문 조사를 시행하였으며 결과는 다음과 같다. 첫째, 무례행동은 감정부조화에 정(+)의 유의적 영향을 미치는 것으로 나타났다. 둘째, 감정부조화는 직무스트레스에 정(+)의 유의적 영향을 미치며 셋째, 직무스트레스는 조직일탈행동과 생활침해행동에 모두 정(+)의 유의적 영향을 미치는 것으로 나타났다. 넷째, 직무스트레스는 창의성에 부(-)의 유의적 영향을 미치는 것으로 나타났다. 다섯째, 감정부조화와 직무스트레스 간의 관계에서 스트레스관리 교육의 조절효과는 나타나지 않았다.

• 대한간호학회지
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• 제45권2호
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• pp.183-191
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• 2015

Purpose: For the current article an examination was done as to whether engaging in sexual intercourse before or during adolescence has a negative impact on the suicidal behaviors of suicide ideation, suicide attempt, and suicide lethality and whether the impact varies according to the context of sexual intercourse and/or gender. Methods: Adolescents who experienced casual sex and romantic sex were compared to adolescents who retained their virginity. Data was from samples drawn from the three waves (2010~2012) of the Korea Youth Risk Behavior Web-Based Survey. Logistic models were used to adjust for a wide array of confounding variables. Results: Any type of sexual intercourse increases risk of all suicidal behaviors. Sexual intercourse in a romantic relationship exhibits enhanced risk of suicidal behaviors compared to casual sex. Adjusting for experience of sexual violence, however, decreases risk of romantic sex substantially, turning some estimates statistically insignificant. In addition, risks for suicide lethality are greater for girls than boys. Conclusion: Romantic sex put adolescents at higher risk for suicidal behaviors than casual sex owing to prevalent sexual violence in the relationships. Girls suffer more substantively adverse outcomes than boys. These results suggest that adolescents will benefit from comprehensive education on sexuality and sexual behaviors regarding how to form and maintain a romantic relationship that is characterized by personal integrity and mutual respect. It is also important to help victims of sexual violence recover from traumatic events by providing emotional support and effective counseling.

• 아동학회지
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• 제7권2호
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• pp.55-73
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• 1986

This study analyzed the socio-psychological process of adolescent drinking behaviors. A total 1,732 high school students in Pusan city were studied by the questionnaire from May to July, 1985. A structural model based on review of the literature was examined in order to test the following three hypotheses: (1) sociocultural and environmental impact on the adolescent belief system for drinking, on drinking situations, and on experiences of deviation, (2) relationships among adolescent belief system, drinking situations, and experiences of deviation, and (3) impact of antecedent variables on adolescent drinking levels. All hypotheses were supported by the data. The important outcomes were discussed as follows: 1. Because interpersonal factors were influential for the adolescent belief system concerning drinking, public drinking education through mass communication or drinking education in the curriculum were recommended. In addition to sex variables, friends' drinking and sibling's drinking were shown to have a positive impacts on drinking situations. Also, adolescent self-reported parents' views on drinking had significant effects. Because adolescent deviant experiences were generally affected by environmental factors, it is recommended that positive extra-curricular activities at both home and school should be investigated. 2. There were significant relationships among adolescent belief systems, drinking situations, and deviant experiences. However, adolescent drinking behaviors in supervised situations had weak correlations with their belif systems and deviant behaviors. 3. Adolescent drinking levels were remarkably influenced by drinking behaviors in unsupervised situations. Because it is difficult to control actual adolescent drinking behaviors in unsupervised situations, it is important to fortify their belief system with continuous education programs.

• 한국공작기계학회논문집
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• 제13권6호
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• pp.23-28
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• 2004

Impact behavior of polycarbonate in various defect state was investigated using an instrumented impact tester. A method of analyzing raw impact data was developed and successfully demonshsted the impact behavior in terms of load-displacement and energy-displacement curves. This technique was shown to be capable of separating defect no-defect initiated fractures as well as their propagation behaviors.