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신입생 기숙사 생활 속에서의 자기통제력과 건강증진 생활양식의 관계
강우람(Kang, Woo-Ram),한광령(Han, Kwang-Leong),김기섭(Kim, Ki-Sup) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.3
The foundational purpose of this research is to find out the health affects of people while managing self control in university dormitory. The research is based on the survey answered from 400 students who are from university located in Young in province in korea, and 378 answers were analyzed by SPSS 18.0 Version statistic program taking frequency, factor and reliability analysis as well as correlation and multiple regression analysis. The conclusion we have from this research is that first, health, stress and self esteem has been influenced by self control managing to improve the health.
송기혁 ( Kee Hyeok Song ),강우람 ( Woo Ram Kang ),이덕주 ( Duck Joo Lee ),김영남 ( Young Nam Kim ) 한국안전학회(구 한국산업안전학회) 2015 한국안전학회지 Vol.30 No.4
A portable recoilless guided missile generates a strong back blast and impulsive noise at the nozzle when it launches. In the case of indoor operations, the hazard of the blast noise from a recoilless weapon increases due to limited indoor spaces. Also, the noise levels determine the operational feasibility of a weapon; therefore, it is important to predict the blast noise levels distribution in the indoor space in advance. In addition, computational fluid dynamics (CFD) method generally used for fluid related simulations, requires high computing cost and time to simulate the whole domains. The domain includes both blast wave region and large and various indoor space region. Therefore, an efficient method for predicting the far-field noise level within a short time should be developed. This paper describes an analysis model for predicting the indoor noise distributions by considering the shape effect of the building within a short time. A new developed blast wave model was implemented using the noise source. Additionally, noise reflections at the closed surfaces such as walls and noise transmissions at the opened surfaces such as windows and doors were considered in calculating the noise levels. The predicted noise levels were compared with the experimental data obtained from the indoor launch test to validate the reliability of program.
송기혁 ( Kee Hyeok Song ),강우람 ( Woo Ram Kang ),박종호 ( Jong Ho Park ) 한국안전학회(구 한국산업안전학회) 2015 한국안전학회지 Vol.30 No.2
Recoilless weapons, which lead strong back blast and impulse noise more than 160 dB, have been used in compliance with the regulation of the safety zone for the safe operations. However, the safety zone regulations for the newly developed weapons should be prepared since the existing guidelines do not provide any information concerning the reason for the safety zone. In this study, the outdoor launch tests were performed to collect the data such as noise, pressure and temperature of the back blast. An assessment method using data obtained from launch tests has been proposed to determine the safety zone. The safety zone has been determined with consideration for the following criteria: Impulse noise, temperature and pressure of the back blast and blast angle. As a results, new safety zones for them have been established for the recoilless weapon developed by ADD (Agency for Defense Development). We expect that this research can be used as a guideline for establishing a new safety zone regulation of similar weapon to be developed.
송기혁(Kee Hyeok Song),강우람(Woo Ram Kang),이덕주(Duck Joo Lee),공병학(Byung Hak Kong),이수갑(Soo Gab Lee),정성수(Sung Soo Jeong),박종호(Jong Ho Park) 한국추진공학회 2013 한국추진공학회 학술대회논문집 Vol.2013 No.12
본 논문에서는 실내공간에서 발생하는 충격소음의 특성에 대해 연구되었다. 로켓추진장치가 분석을 위한 소음원으로 사용되었으며 동일 성능의 로켓추진기관을 가지고 실외와 실내에서 순차적으로 실험이 진행되었다. 실내실험의 경우 세 가지 실내 공간 크기(27, 35, 50 m3)에서 실험이 수행되었다. 실험 결과에 따르면 실외에 비해 실내에서 최고음압레벨(Peak sound pressure level)과 잔향시간이 크게 증가하였으며 주파수 분석을 통해 100 Hz이하 저주파 영역에서 모드주파수가 발생했음을 확인하였다. 실내공간 크기에 대한 모드주파수 분석 결과에 따르면 실험값이 이론값과 비슷함을 알 수 있었다. In this paper, the characteristics of impulsive sound pressure generated inside the building were studied. The rocket propulsion motors were used as a source of impact sound pressure and sound pressure was measured by using microphones, through launching test to analyze both outdoor and indoor noise characteristics. Indoor launching tests were carried out under three types of indoor size conditions: 27, 35, and 50 m3. According to the indoor launching test results, both peak sound pressure level and reverberation time were highly measured in comparison with the outdoor test cases. The frequencies of the fundamental mode existed in the low-frequency region, below 100 Hz, were found through frequency analysis. These results were well matched with calculated theoretical values.