Spectral Envelope과 Convolution을 이용한 소리합성 연구

이사우(Sa Woo Lee),박태홍(Tae Hong Park) 한국전자음악협회 2008 에밀레 Vol.- No.6

밀가루 분진 직접노출군과 비노출군의 호흡기, 직업성 천식 및 비염에 대한 자각증상 비교

이사우 ( Sa Woo Lee ),피영규 ( Young Gyu Phee ) 한국산업보건학회 (구 한국산업위생학회) 2018 한국산업보건학회지 Vol.28 No.3

Objectives: The purpose of this study was to compare the self-reported symptoms of occupational asthma, occupational rhinitis, and respiratory symptoms between a direct exposure to flour dust group and a non-exposure group from the bakery industry. Methods: The participants were 62 workers directly exposed to flour dust and 30 non-exposed workers. The survey was composed of questions related to general characteristics. Korean self-reported respiratory symptoms(SNU-93), occupational asthma, and occupational rhinitis data was collected from April to July 2017. Results: The smoking rate among the direct exposure to flour dust workers was 67.7% and the mean of working hours(11-12) was 96.8%. The SNU-93 questionnaire revealed that respiratory symptoms in the chest and wheezing or whistling were significantly higher among the direct-exposure group than non-exposure group. The response for occupational asthma symptoms was significantly higher in the direct exposure group(2.4 points) than in the non-exposure group(1.6 points). Conclusion: In order to decrease the symptoms of these respiratory diseases among bakery workers exposed to flour dust, it is necessary to reduce working hours and the smoking rate. The performance of periodic medical examinations is needed to find abnormal respiratory diseases. In addition, workers who have been diagnosed with asthma and rhinitis should consider switching to a process that is not exposed to flour dust.

어깨 부위 근골격계 상병 신청자들의 특성

조우인 ( Woo-in Jo ),이사우 ( Sa-woo Lee ),피영규 ( Young Gyu Phee ) 한국산업보건학회 2021 한국산업보건학회지 Vol.31 No.3

Objectives: The purpose of this study was to identify the distribution of diagnostic disease among applicants for shoulder musculoskeletal disease. Methods: In 2020, 47 diagnostic disease applicants were investigated for sociodemographic, health, work, job, and diagnostic disease characteristics. The data were corrected through on-site visits and analyzed using descriptive statistics with SPSS WIN23.0. Results: Most of the applicants were male and elderly. They had high blood pressure(38.3%) and diabetes (21.3%), and the drinking rate and smoking rate were also high. The most common type of employment was daily workers, and it was confirmed that the working condition was poor due to excessive working hours and short rest times. Most of the applicants for shoulder diagnostic diseases were in the construction industry, and the most common diagnostic disease was a rotator cuff tear. Conclusions: It is necessary to develop a musculoskeletal disease prevention program suitable for construction workers to reduce their work-related disease. When establishing a program, business type, task, and diagnostic disease must be considered.

울산 지역 학교의 휘발성유기화합물 평가

정종현,이사우,피영규,Jung, Jong-Hyeon,Lee, Sa-Woo,Phee, Young-Gyu 한국학교보건학회 2012 韓國學校保健學會誌 Vol.25 No.1

Purpose: The purpose of this study was to investigate the concentrations of volatile organic compounds at elementary, middle, and high schools in Ulsan and its surroundings. Methods: To assess the hazardous chemicals of the 66 classrooms in the 22 schools, the 6 volatile organic compounds such as TVOCs (Total Volatile Organic Compounds), benzene, toluene, xylene, ethyl benzene and stylene were measured and analyzed from the beginning of May to the end of December, 2009. Results: The mean concentrations of TVOCs in the elementary schools were higher than those of middle and high schools, and multi-purpose classrooms was higher than that in general ones. The benzene and toluene level in schools in Dong-Gu in the vicinity of assorted industrial complexes was higher than that of schools located in other districts around the Ulsan Metropolitan Area. Conclusion: In case of schools in Ulsan Metropolitan Area, elementary school, schools in Dong-Gu, and multipurpose classrooms over general classrooms should be given a high priority for the management of volatile organic compounds.

택시 운전직 종사자의 직장폭력 평가

이미호 ( Mi Ho Lee ),이사우 ( Sa-woo Lee ),피영규 ( Young Gyu Phee ) 한국산업보건학회 (구 한국산업위생학회) 2021 한국산업보건학회지 Vol.31 No.1

Objectives: The purpose of this study was to evaluate the level of workplace violence experienced by taxi drivers and identify the affected factors. Methods: Two hundred twelve taxi drivers were investigated for general characteristics and workplace violence was evaluated using K_WVSⓇ13. The data was collected from July to October 2020 through questionnaires. It was analyzed using t-test and ANOVA with SPSS WIN23.0. Results: Most of the taxi drivers were elderly and suffered from long hours of labor and low wages. After evaluating four sub-factors of workplace violence, ‘psychological and sexual violence from customers’, ‘psychological and sexual violence from customers, supervisors, and coworkers’ and ‘physical assault from customers/supervisors/coworkers’ were judged as risks. For ‘psychological and sexual violence from customers, supervisors, and coworkers’, the mean score by age was significantly higher for workers in their 70s or older and those with 30 years of experience compared to other age groups. In the case of ‘psychological and sexual violence from customers’, sales taxis were significantly higher than private taxis. Conclusions: It is necessary to develop a workplace violence prevention program suitable for the characteristics of taxi drivers in order to manage their physical and mental health. When establishing such a program, business type, age, and experience must be considered.

의료기관 종사자의 감정노동과 우울수준의 관련성

박가영 ( Ka-young Park ),이사우 ( Sa-woo Lee ),권장미 ( Jang Mi Kwon ) 한국산업보건학회 (구 한국산업위생학회) 2017 한국산업보건학회지 Vol.27 No.1

Objectives: We focused on investigating the effects between symptoms of depression and emotional labor among health professionals. Methods: A cross-sectional survey design was used. The participants were 365 health professionals. The survey was composed of questionnaires related to general characteristics and work-related characteristics. Korean emotional labor scale-24(K-ELS@24) and Patient Health Questionnaire(PHQ-9) data was collected from July 1, 2015 to August 31, 2015. Results: The prevalence for symptoms of depression among the survey participants was 79.2%. Organizational support(β=.387, P<0.05), emotional disharmony(β=.238, P<0.05), customer conflict(β=.125, P<0.05) and emotional effort(β=.122, P<0.05) showed a significant association with symptoms of depression. Conclusions: These results suggest that emotional disharmony, organizational support and organizational surveillance are related to symptoms of depression. Managing organizational support on the emotional labor scale is the most important factor in controlling symptoms of depression.

지각된 건강상태가 낮은 병동 간호사의 수면시간과 건강증진행위

김순희(Soon-Hee Kim),이사우(Sa-Woo Lee),박현희(Hyun-Hee Park) 한국생활환경학회 2015 한국생활환경학회지 Vol.22 No.5

The purpose of this study was to measure the sleeping hours of clinical nurses who perceive to have poor health and to find the influencing variables on health promotion behavior. The subjects were 177 nurses working in university hospital in Seoul and the survey was performed during 2015. 7. 24~8. 7. The data were analyzed by SPSS 21.0. The average of age, career, working hours per week and sleeping hours per day was 34.35, 11.76 years, 45.66 hours and 6.35 hours respectively. It meant that they are not that young, expert, have overtime and short sleeping hours. Nurses whose career fewer than 5 years had more sleeping hours than 6-10 years and same as 11-20 years than 21 years. 4 factors were extracted in the health promotion behavior – ‘Active health-management’, ‘Nutrition management’, ‘Satisfactory interpersonal relationship’ and ‘Disease prevention’. Sleeping hours were unrelated with these variables. Exercise frequency explained ‘Active health-management’ 52.6%. Age and exercise frequency explained ‘Nutrition management’ 35.7%. Alcohol drinking frequency explained ‘Disease prevention’ 5.1%. Exercise frequency explained ‘Satisfactory interpersonal relationship’ 1.7%, but it was not significant. Therefore, it is desirable to improve the level of nurses’ health promotion behavior by building ward’s ambience to increase exercise frequency.

경찰공무원의 대사증후군 유병률과 영향 요인

홍주희 ( Ju Hee Hong ),이사우 ( Sa Woo Lee ) 한국산업보건학회 2014 한국산업보건학회지 Vol.24 No.4

Objectives: The purpose of this study was to evaluate the predictors of metabolic syndrome among police officers and determine its prevalence. Methods: Data were collected through a questionnaire survey and medical examination among 1,089 male police officers from 2010 to 2013. Information about age, marital status, smoking, drinking and exercise were based on data from the self-administered questionnaire. We collected job type, working position, and work duration from company personnel data and the indices of metabolic syndrome through the medical examination. Metabolic syndrome was assessed according to the NCEP-ATP Ⅲ definition and the Asia-Pacific obesity guidelines. Results: The prevalence of metabolic syndrome among the 1,089 police officers was 33.4%. The prevalence of metabolic influencing factors were 47.5% for abdominal obesity, 30.1% for hypertension, 37.1% for hypertriglyceridemia, 22.0% for low HDL-cholesteralemia and 13.2% for hyperglycemia. Factors such as age, drinking, and family history were significantly associated with metabolic syndrome. Conclusions: Weight control and a moderate drinking program may decrease the prevalence of metabolic syndrome among male police officers.

일부 대학 내 연구실험실의 보호구 및 흄후드 관리 실태에 관한 연구

박인규 ( In Kyu Park ),이사우 ( Sa Woo Lee ),정종현 ( Jong Hyeon Jung ),피영규 ( Young Gyu Phee ) 한국산업보건학회 2014 한국산업보건학회지 Vol.24 No.2

Objectives: This study intends to determine the current status of management of personal protective equipment fume hoods in university laboratories. Methods: A walk-through survey of 402 labs in Gyeongbuk Province and Daegu Metropolitan City were carried out between May 2009 and July 2010. Respectively, 348 and 54 laboratories were examined in Gyeongbuk Province and Daegu. Results: In size, labs serving over 15,000 student made up the majority with 276(66.4%). In terms of major, engineering labs were the highest in number with 100(24.9%). As to personal protective equipment, a gas mask and a dust mask were available in 17.8% and 14.3% of the labs, respectively, but 68.9% of labs were equipped with protective goggles. Meanwhile, only 12.7% of labs had separate protective equipment storage boxes. About 60% of the labs had installed a fume hood, of which the average capture velocity was 0.37 m/sec. Conclusions: For toxic substances, the labs are obliged to provide personal protective equipment in in accordance with the Occupational Safety and Health Act. In addition, the capture velocity of fume hoods must be in strict compliance in order to prevent occupational diseases due to toxic chemicals.

피부미용사의 손 부위 통증에 관한 연구

김정화 ( Jeong Hwa Kim ),피영규 ( Young Gyu Phee ),이사우 ( Sa Woo Lee ) 한국산업보건학회 2015 한국산업보건학회지 Vol.25 No.2

Objectives: The purpose of this study was to investigate estheticians`` self-reported pain symptoms and pain levels according to the parts of the hand. Methods: Data were collected through a questionnaire survey among 116 estheticians from 31 skin care centers and spas. Information about general characteristics, job characteristics and work characteristics were based on data from the self-administered questionnaire. To determine the self-reported pain symptoms and pain levels according to the parts of the hand, a Cornell Musculoskeletal Discomfort Questionnaire was used. Results: The subjects had the greatest self-reported pain symptoms in the thumb(Right: 53.4%, Left: 46.6%) and felt the highest level of pain in the wrist(Right: 4.87 points, Left: 4.71 points). Physical burdens and age had statistically significant effects on the pain level in the right hand, while physical burdens and the manager rather than the director had statistically significant effects on the pain level in the left hand. Conclusions: Since the thumb and wrist have the greatest subjective pain symptoms in the hand, the use of proper tools is recommended in order to reduce the usage of the thumbs during massage, as is regular stretching to protect the wrists.