컴퓨터 작업에서 마우스 종류에 따른 상완 부하 평가

송영웅(Young-Woong Song),김경아(Kyoung-Ah Kim) 대한산업공학회 2011 대한산업공학회지 Vol.37 No.3

과수 작물과 하우스 작물 재배의 산업보건학적 현황 조사

송영웅 ( Song Young-woong ) 대구가톨릭대학교 자연과학연구소 2019 자연과학연구논문집 Vol.17 No.1

This study investigated the work load of each farm-work process, occupational health related problem situation, perceived fatigue symptoms, and body parts with musculoskeletal disorders symptom for fruit crop farmers (n=27) and vinyl house seed farmers(n=44). Results showed that for vinyl house work, the workload of cultivating process showed the highest stress, while pollination/thinning out and crop during process induced high workload for fruit crop farming. Eduction about the preventive method of toxic gas/dust/vibration/noise was not conducted for 88% of the respondents. Perceived fatigue results showed that the house seed farmers was 39% which was higher than the fruit crop farmers(20%). Forty four percentage of fruit crop farmers showed musculoskeletal symptoms (pain, ache) in the shoulder, and 37% for hand/wrist, and 26% for the knee. However, the house seed farmers showed MSDs symptoms the highest percentage in the knee(59%), and low back(50%), hand/wrist(39%), shoulder(34%). These results indicate that there is a quite big difference between the fruit crop and house seed farmers in the aspect of workload for each farming step, occupational health control practices, perceived fatigue, and body parts with MSDs symptoms. Thus, nationwise scale survey for different crops, farming methods should be conducted to understand and prevent the health related problems of the farmers.

정적 부하 작업에서 EMG 모델과 세가지 최적화 모델을 이용한 척추 부하 평가

송영웅 ( Young Woong Song ),정민근 ( Min Keun Chung ) 한국산업위생학회 2005 한국산업보건학회지 Vol.15 No.1

This study investigated the spinal loads(L5/S1 disc compression and shear forces) predicted from four biomechanical models: one EMG model and three optimization models. Three objective functions used in the optimization models were to miminize 1) the cubed muscle forces: MF3, 2) the cubed muscle stress: MS3, 3) maximum muscle intensity: MI. Twelve healthy male subjects participated in the isometric voluntary exertion tests to six directions: flexion/extension, left/right lateral bending, clockwise/counterclockwise twist. EMG signals were measured from ten trunk muscles and spinal loads were assessed at 10, 20, 30, 40, 50, 60, 70, 80, 90%MVE(maximum voluntary exertion) in each direction. Three optimization models predicted lower L5/S1 disc compression forces than the EMG model, on average, by 31%(MF3), 27%(MS3), 8%(MI). Especially, in twist and extension, the differences were relatively large. Anterior-posterior shear forces predicted from optimization models were lower, on average, by 27%(MF3), 21%(MS3), 9%(MI) than by the EMG model, especially in flexion(MF3: 45%, MS3: 40%, MI: 35%). Lateral shear forces were predicted far less than anterior-posterior shear forces(total average=124 N), and the optimization models predicted larger values than the EMG model on average. These results indicated that the optimization models could underestimate compression forces during twisting and extension, and anterior-posterior shear forces during flexion. Thus, future research should address the antagonistic coactivation, one major reason of the difference between optimization models and the EMG model, in the optimization models.

외국 어린이 체표면적 실측 자료를 이용한 체표면적 예측 회귀식 모델 비교

송영웅 ( Young-woong Song ) 대구가톨릭대학교 자연과학연구소 2022 자연과학연구논문집 Vol.20 No.1

The body surface area is important for evaluating the dermal exposure of various hazardous substances. The body surface area can be determined by direct measurement or regression models using height and weight as independent variables. This study compared five regression models (two Korean models : LeeJY(2008), LeeHM(2009) and three foreign models : Boyd(1935), Gehan(1970), US EPA(1985) using 268 direct measurement data of children. Regression analysis was conducted to compare the prediction ability of five models, and prediction errors were also compared. Regression analysis revealed that the five models were excellent in predicting the body surface areas (R2 >0.98). The LeeHM(2009) model overestimated, but other models underestimated The relative prediction errors were less than 10%, except one model (15.2%). The Korean adult model (LeeJY(2008)) showed better predicting ability than the Korean children model(LeeHM(2009)), and prediction errors were also smaller. But, this result should be interpreted carefully because this study used the foreign children data.

QFD 적용을 위한 소비자 요구사항 선정 방법론 조사 연구

송영웅 ( Young Woong Song ) 대구가톨릭대학교 자연과학연구소 2009 자연과학연구논문집 Vol.7 No.1

To apply the QFD(quality function deployment) method to the field environment, the building of HOQ(house of quality) in a proper size is very important in the aspects of time and effort. Two factors, CAs(customer attributes) and EC(engineering characteristics) determine the size of the HOQ. Thus the proper selection of the two factors in appropriate size has been very important issues. This study surveyed the selection methods of the CAs(customer attributes) among two factors determining the size of HOQ. First, the QFD application papers were searched to identify the frequently ued CA selection methods. Also, the subjective criteria were proposed that could be used in the preliminary selection stage of the CAs.

건설기업의 BPM 도입을 위한 단위업무의 변화빈도 분석

송영웅(Song Young-Woong),김기훈(Kim Ki-Hoon),최윤기(Choi Yoon-Ki) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.7

Recently in the various constructional market, construction companies have realized to need a multi-change and tried to introduce Business Process Management(Below BPM) for their managerial environment which is enable to improve separation between process and IT. It also suggests a sustainable process change with monitoring. To introduce BPM effectively, however, they must have an appropriate process matched their managerial situation. This paper studied the theory of BPM and suggested Business Process Architecture (Below BPA) based on the interview from staff working construction companies. Further, we extracted some relatively-low unit tasks in a change frequency based on the BPM practitioners with a comprehensive survey of 10 construction companies and analyzed them through change frequency unit tasks of 11 points in the level of the mega process and the process. This will help selecting unit tasks which are relatively stable in terms of easiness by analyzing patterns of introducing BPM.

음절수, 폰트, 색 대비, 표시 형태, 글자 크기, 연령대가 한글 문자 정답률에 미치는 영향

송영웅 ( Young Woong Song ),임창욱 ( Chang Wook Lim ),이인석 ( In Seok Lee ),정명철 ( Myung Chul Jung ),모승민 ( Seung Min Mo ),공용구 ( Yong Ku Kong ) 한국안전학회 2009 한국안전학회지 Vol.24 No.5

노출콘크리트 마감공법의 시공 프로세스 분석을 통한 설계 시공관리 방안

송영웅,최윤기,Song, Young-Woong,Choi, Yoon-Ki 한국건설관리학회 2005 건설관리 : 한국건설관리학회 학회지 Vol.6 No.6

노출 콘크리트 마감공법은 건축설계자의 입면 개념에 따라 일반 및 제물치장 콘크리트 마감공법과 더불어 다양한 마감품질과 표면형태를 나타내며 최근 적용사례가 꾸준히 증가하고 있는 추세이다. 노출 콘크리트 마감공법은 설계 및 시공수준, 마감면의 품질 및 평활도, 색상 및 질감에 따라 타 콘크리트 마감공법보다 공사비 투입이 증가되고 체계적인 설계 및 시공관리가 요구됨에도 불구하고 노출 콘크리트 마감공법에 대한 정의가 불명확하고 설계, 시공, 유지관리 단계별 관리 방안이 구체적으로 제시되지 않아 원가상승, 시공품질 저하, 시공성 저하 등의 문제가 유발되고 있다. 본 연구에서는 노출 콘크리트 마감공법의 체계적인 관리방안 제시를 위하여 국내의 불명확한 노출 콘크리트 마감공법의 정의를 문헌조사 및 사례조사를 통하여 명확하게 제시하고, 노출 콘크리트 마감공법의 색채균일성, 균열발생 억제, 콘크리트 충전성확보 등 노출콘크리트 마감공법의 요구사항과 결함유형을 분석하였다. 이를 바탕으로 노출 콘크리트 마감공법의 시공프로세스를 타 콘크리트 마감공법과 비교 분석하였으며, 노출 콘크리트 마감공법의 설계단계, 시공계획 및 관리단계, 유지 보수 단계별 관리방안을 제시하였다. Because designers want to express various elevation, architectural concrete has recently paid attention to finish material and has increasingly used in the construction. architectural concrete needs more careful and professional supervision works such as controling quality of color, texture, construction plan, and design plan. none the less, It is not clear to define process and manage methods for the construction life-cycle, which causes the expense to increase and the quality to be poor. this study will analyze concrete finish method by dividing three parts which are common, exposed and architectural concrete finish method. definition and the limit of application in architectural concrete finish method will be present by comparing three methods. Throughout an interview with a staff in charge and a case study, this paper shows the requirement and the keynote of management which are divided by three steps; the design, construction and maintenance. finally, this research provides management methods of individual steps for effective construction.

Phase Change Material Effects on the Performance of Lithium-Ion Battery Cells Under Varying Temperature Conditions

Young-Woong Song(송영웅),Jehong Im(임제홍),Min-Young Kim(김민영),Ho-Sung Kim(김호성),Youngsun Hong(홍영선),Byung Hak Park(박병학),Dong Yoon Lee(이동윤),Jae Heon Lee(이재헌),Jaekook Kim(김재국),Jinsub Lim(임진섭) 한국전지학회 2022 한국전지학회지 Vol.2 No.1

최근, 기후변화의 영향으로 재생가능 자원 개발 문제가 큰 주목을 받고 있다. 리튬이온배터리(LIBs)는 화석 연료의 대안으로 제공되어 자동차 산업에서 특히 주목을 받고 있다. 그러나 LIB가 보여주는 배터리 수명과 해당 주행거리에 한계가 있다. LIB 내의 열 관리는 배터리 수명을 결정하는 중요한 요소이다. 본 연구에서는 수동적 열 관리 시스템을 제공하는 상변이 물질(PCM)을 다양한 조건에서 분석하였다. PCM으로 덮인 LIB에서 얻은 결과는 덮지 않은 참조 셀에서 얻은 결과와 비교하였다. PCM은 온도를 조절하여 셀에 의해 나타나는 열화를 감소시킬 수 있는 것으로 나타났다. 따라서 PCM은 LIB 성능의 개선을 촉진할 수 있음을 보여준다. At present, the issue of renewable resource development has attracted significant attention owing to the effects of climate change. Lithium-ion batteries (LIBs) have received particular attention within the automotive industry as they provide a viable fossil fuel alternative. However, the commercialization of electric vehicles is currently limited by the battery life, and corresponding mileage, exhibited by LIBs. Thermal management within the LIB is a significant factor in determining the lifetime of the battery. In this study, a phase change material (PCM), which provides a passive thermal management system, was analyzed under various conditions. The results obtained from the PCM-covered LIB were compared with those obtained from a reference cell without the PCM covering. It was shown that the PCM can regulate the cell temperature, thereby reducing the deterioration exhibited by the cell. This PCM characteristic can, therefore, facilitate an improvement in the LIB performance.

글자의 복잡성이 청년층의 한글 일음절 글자 가독성에 미치는 영향

송영웅 ( Young Woong Song ) 대구가톨릭대학교 자연과학연구소 2013 자연과학연구논문집 Vol.11 No.1

This study investigated the effects of the font type (gothic, myungjo), color contrast (black on white, white on black), distance (50 cm, 200 cm), complexity (simple, complex) on the Korean characters`` legibility. Total eighteen subjects (male: 10, female: 8) participated in the legibility experiment. Subjects were instructed to read a target panel presented in the distance of 50 cm or 200 cm. The target panel was made with different font type, character complexity, and color contrast. Results showed that simple characters revealed better legibility than complex characters, and gothic type showed better legibility than myungjo type. From the analysis of variance of the minimum size for the 0% correct answer, it was found that the main effects of the distance, font type, and complexity were statistically significant (p<0.05). These main effects were also statistically significant for the 100% correct answer. Thus, it was recommended that the character complexity should be considered when designing or making guidelines for the letter size of the medical products, pesticide products, or other presentation materials.