• 한국멀티미디어학회논문지
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• 제9권5호
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• pp.635-648
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• 2006

초고속 인터넷의 보급이 대중화되고 콘솔 게임기와 모바일이 네트워크 게임을 지원하면서 온라인 게임 산업이 빠르게 성장하고 있으며, 온라인 게임으로 인한 인터넷 트래픽이 꾸준히 증가하고 있다. 게임 네트워크의 설계나 시뮬레이션을 위해서는 온라인 게임 트래픽의 분석이 선행되어야 하기 때문에, 온라인 게임의 트래픽에 관련된 연구가 국내 외에서 꾸준히 진행되고 있다. 본 논문은 온라인 게임의 트래픽 측정과 분석을 위하여 게임 전용 트래픽 측정 및 분석 툴인 GameNet Analyzer를 제작하여 사용하였다. 서로 다른 장르의 게임인 Quake 3, Starcraft, WoW(World of Warcraft)의 트래픽을 측정하여 플레이어의 수와 게임 플레이 방식에 따른 패킷 크기, 패킷 IAT(inter-arrival time), 데이터 전송률과 패킷 전송률을 분석하고, 측정된 데이터를 이용하여 트래픽을 모델링한다. 이러한 게임 트래픽의 분석이나 트래픽 모델은 효율적인 네트워크 시뮬레이션, 게임 네트워크의 성능 평가, 온라인 게임의 설계 등에 활용될 수 있다.

• Journal of Nutrition and Health
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• 제15권2호
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• pp.107-118
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• 1982

In order to obtain the information on the meal behaviors and the status of using university cafeteria, the survey was conducted through the questionaries to 2,425 students (Male : 48.8%, Female : 51.2%) of 9 universities throughout Korea. While most of the male students were having breakfast regularly (M : 70.7%, F : 52.7%), the female students enjoyed snacks for lunch (M : 21.8%, F : 55.0%) or between meals (M : 42.0%, F : 81.0%). Most of the subjects thought that skipping breakfast had bad influence on health. The male students had their lunch at the cafeteria more frequently than the female students. And the students in the universities without off campus dining facilities used cafeteria often. The students in the university-managed cafeteria also used the facilities more often than the rental situation. Other lunch habits in the case of not eating at the cafeteria were ‘bring lunch’ and ‘eat off-campus’. The main reasons for not eating at the cafeteria were ‘too crowded’(28.3%) and ‘waiting in long time'(28.0%). Only 4.9% of the students were satisfied with the menu, but the nearly half (42.3%) showed unsatisfaction largely because of the limited choice of menu Students pointed out the taste and the nutritional quality of the menu should be improved firstly. Another strong complaint was waiting in line.

• Journal of Radiation Protection and Research
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• 제3권1호
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• pp.23-28
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• 1978

유기석계(有機錫系) 안정제(安定劑)를 포함하고 있는 polyvinylchloride (PVC)의 내방사성(耐放射性)은 가소제(可塑劑)로서 첨가된 dioctylphthalate(DOP)의 양의 증가와 더부러 증가하며 이와 같은 내방사성(耐放射性)의 평가는 시료의 IR 특성 상에서 안정제의 해이(解離)에 기인(起因)하고 있는 $1,540{\sim}1,640cm^{-1}$에서의 흡수대가 선량과 더부러 변화하는 거동으로 살필 수 있다. 가소화된 PVC에서의 내방사성의 증가는 DOP 분자구조의 일부를 형성하는 benzen 환(環)에서 방사 에너지가 공명흡수 되기 때문이라 사료(思料)되며 이와 같은 견해(見解)는 방사선량에 대한 도전율변화특성(導電率變化特性)의 고찰 결과와도 잘 일치 한다. 실용적면(實用的面)에서 $0{\sim}100Mrad$ 사이의 선량에 대한 충분(充分)한 내방사성(耐放射性)을 얻기 위하여는 30phr 전후의 DOP 첨가량이 필요하다.

• 여성건강간호학회지
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• 제6권1호
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• pp.82-95
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• 2000

The purpose of this study is to provide a basis to recognize the health behaviors of middle-aged women that are constructive to a healthy life style. Data were collected from interview of questionnaires completed by 208 middle-aged women living in Incheon from November 1 to 30, 1999. The questionnaires used in this study were obtained from publications on health-related topics shown in literature review. These topics included : health concept, diseases, use of tobacco, alcohol, caffeine, drug, exercise and diet, cause of stress and stress management. The data were analyzed by descriptive statistics using the SPSS program. The results of this study were as follows. 1. Middle-aged women though of concept of health as a doing daily living pattern(48.1%). 2. 49.5% of the middle-aged women had illness or disease, which included gastritis, arthritis, anemia, hypertension, indigestion and allergies. 3. 1.4% of the middle-aged women smoked cigarettes. Most of them began to smoke due to stress. 4. 42.3% of the middle-aged women drink alcohol. Most of them began drinking due to peer pressure. 5. 28.8% of the middle-aged women consumed caffeine-containing products 5-7 times per week. 6. 55.3% of the middle-aged women took drugs. Most of the drugs were digestant and analgesics. 7. 21.2% of the middle-aged women exercised more than 2 times per week. 8. Most of causes of stress were economic difficulties and sickness. The method of stress management were enduring and sleeping.

• 여성건강간호학회지
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• 제25권4호
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• pp.423-433
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• 2019

Purpose: The study aimed to examine the effects of sleep pattern, stress, and attitude towards menstruation, and behavior that causes a reduction in exposure to endocrine disrupting chemicals (EDCs) in the course of premenstrual syndrome (PMS) in female adolescents. Method: In total, 200 girls attending middle school in K city were recruited via convenience sampling between December 11 and 31, 2018, and 192 subjects were selected for the analysis. Data were analyzed using descriptive statistics, an independent t-test, ANOVA, Pearson's correlation coefficient, and multiple regression. Results: Overall, 9 (4.7%), 152 (79.2%), and 31 (16.1%) students had morning-, intermediate-, and evening-type sleep pattern, respectively. The mean scores for school-related stress were highest. Scores for stress regarding relationships with friends were the lowest. The mean score for attitudes toward menstruation was 72.33 out of 147. The mean score for behavior that led to a reduction in EDCs exposure was 56.57 out of 85. The mean scores for PMS severity were 25.30 and 38.39 out of 60. Analysis of factors affecting PMS revealed that severity of menstrual pain (β=.28), use of analgesics during menstruation (β=.17), family history of PMS (β=-.16), stress (β=.19), and behavior that reduces EDCs exposure (β=-.17) exerted significant effects on PMS. The explanatory power of these variables was 37%. Conclusion: The findings propose the necessity of a health intervention program including educational information, which can reduce PMS in adolescents, induce the behaviors which can decrease exposure to EDCs, and activities for managing the stress levels.

• 대한불안의학회지
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• 제14권2호
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• pp.71-79
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• 2018

Objective : Several earlier studies have reported similar symptoms in patients with posttraumatic stress disorder (PTSD) who have been repeatedly exposed to relevant media after disasters and trauma. This study aimed to examine the effects of indirect trauma experience through media rather than direct traumatic events on an individual's social life. Methods : Five hundred and fifty-four individuals participated in our online, self-reported questionnaire survey. All subjects were asked to complete a demographic questionnaire, Posttraumatic Diagnostic Scale, Beck Depression Inventory, the Impact of Event Scale-Revised, State-Trait Anxiety Inventory, Korean version of Alcohol Use Disorder Identification Test, Patient Health Questionnaire-15, Suicidal Behaviors Questionnaire-Revised. Participants were assessed in regards to their experience of violent media exposure within the past three months. Results : Data from our study indicates that the group exposed to violent media had significantly higher perceived stress, physical symptoms, insomnia, and suicide ideation in comparison to the control group. Among the major symptoms of PTSD, the proportion of intrusion symptoms was relatively high in the media exposed group. Conclusion : This suggests that indirect trauma caused by media exposure could cause post-traumatic stress symptoms. The PTSD caused by indirect trauma may have slight differences from the PTSD caused by direct trauma. Therefore, it is necessary to understand, prevent, and control the adverse effects of media.

• 한국항공우주학회지
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• 제47권10호
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• pp.712-719
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• 2019

본 연구에서는 최근 다양한 큐브위성 임무에 사용되는 테이프 스프링 힌지의 거동 해석을 수행하였다. 테이프 스프링은 곡선 단면을 갖는 직선형의 얇은 스트립이며 곡률에 따라 달라지는 강성변화로 인해 비선형성이 강하게 발생한다. 이전 연구에서 제시된 회전-모멘트 선도 모델을 바탕으로 테이프 스프링의 거동 특성을 분석하였으며, 시중에 판매되는 상용 테이프 스프링 형상을 정확하게 모사하여 ABAQUS 수치 해석을 진행하였다. 테이프 스프링을 굽히는데 소요되는 최대 모멘트를 예측하였으며 단면의 원호각이나 두께 등의 변화에 따른 파라미터 스터디를 수행하였다. 또한 간략한 실험을 통해 수치해석 결과를 비교 검증하여 보다 정밀한 큐브위성 동적 거동 해석을 위한 향후 연구 방향을 제시한다.

• 지구물리
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• 제9권2호
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• pp.77-86
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• 2006

실시간 동적 GPS (Real-Time Kinematic Global Positioning System) 측량과 관성항법장치인 IMU(InertialMeasurement Unit)는 보다 정확한 지형정보의 획득과 동체의 모니터링에 이르기 까지 그 활용범위가 확대되어가고 있다. 실시간 동적 GPS 안에 신속히 수행할 수 있으며 , IMU는 정확하게 동적자세를 결정할 수 있기 때문에 교량 등 대형구조물의 거동을 모니터링 하는데 유용한 방법으로 대두되고 있다 . 따라서 본 연구에서는 대형구조물의 거동을 모니터링하는 시스템을 구축하기 위해서 GPS 측위방법 중 실시간 동적 GPS 측량 방법을 이용하여 현수교 주탑의 거동을 측량함에 있어, 먼저 GPS에 의한 정확한 위치를 분석하였으며 , 이를 바탕으로 실시간 동적 GPS 측량과 IMU를 이용한 모니터링 경보 시스템을 개발하였다 . 개발된 시스템으로 관측한 결과와 비교하여 , X축은 1mm, Y축은 1mm, Z축은 2.2m 로서 실시간 동적 GPS 측량과 IMU를 이용한 구조물 모니터링 측량이 가능함을 입증할 수 있었다 .

• 한국학교ㆍ지역보건교육학회지
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• 제15권3호
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• pp.43-54
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• 2014

Objectives: The purpose of this study was to find out the relation factors of weight control behaviors, mental health status and body image perception in adolescents and to use basis data of health promotion for adolescents. Methods: This study used data from the Fifth Korea National Health and Nutrition Examination Survey (KNHANES V-2, 2011). The subjects were 653 between 12-19 age. Data analysis was done with SPSS/WIN 19.0 using Chi-square test, and Logistic regression. Results: The result is as follows. The case of female adolescents, abnormal perception of body image was significantly higher on weight reduction effort and normal weight, low weight in BMI. The case of male adolescents, abnormal perception of body image was higher on normal weight in BMI. Conclusions: The adolescents tend to do unreasoning weight loss behavior without properly perception for their body image. Therefore, we suggest that adolescents be provided social support for positive body image and be developed perception program with the importance of inner values.

• 한국학교ㆍ지역보건교육학회지
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• 제18권3호
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• pp.55-68
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• 2017

Objectives: Republic of Korea has entered an aged society, recently. As chronic diseases increase, elderly inpatients has been increasing and they have used caregivers for convenience. Accordingly, this study aims to investigate the oral health knowledge and attitude of caregivers on oral health management of elderly inpatients, which would affect the general health and quality of life. Methods: A survey questionnaire was distributed to the caregiver(n=165), at a neurosurgery or orthopedic hospital inpatient ward in Seoul, Gyeonggi-do from April 1 to 14, 2017. We analyzed the data with descriptive statistics analysis, chi-squared analysis and logistic regression analysis by using SPSS 23.0. Results: The response rate to the questionnaire was 92%. Oral health management provided by caregivers to inpatients in the elderly was prevention of oral diseases(92.8%), tooth brushing (89.5%), use of oral care products(68.4%), denture cleaning(90.8%) and oral cleaning(90.8%). Frequency analysis of oral health management in accordance with the educational needs of caregivers was all confirmed statistically significant(p<0.05). In the logistics regression model, oral health knowledge was significantly associated with low oral cleaning(OR=1.58) and oral health attitude was significantly associated with high denture cleaning(OR=1.29) and oral cleaning(OR=1.28) after adjustment for other covariates including gender, age, certification, education level, ward, working years. Conclusions: It is necessary to expand the scope and improve the quality of education that can change the attitudes and behaviors of the caregivers on the oral health management of the elderly on the basis of the current oral health education.