VDT작업별 정신사회적 스트레스와 근골격계 장애에 관한 연구

백남종,강종두,주영수,배인근,권호장,박종만,조수헌,김돈규,김재용,최홍렬 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.4

It has been hypothesized that jobs that have both high psychological demands and low decision latitude("job strain") can lead to musculoskeletal disorder. The objective of this study was to test whether job strain was correlated with the presence of work-related musculoskeletal disorder, especially myofascial pain syndrome(MPS). Information on demographic factors, confounders such as household load and taking care of children or not, and scores for decision latitude, job demand, and social support was obtained by self-administered questionnaire, which had been developed in Korean language, by adopting NIOSH instrument and Extended Karasek Model(16 items). All subjects were also examined by rehabilitation medicine specialists for musculoskeletal disorders. Subjects(n=370) could be categorized into 4 groups, these were, housewives(n=89), shipyard CAD workers(n=89), general female workers(n=79; nurses, insurance counselors, public officials, clerks, etc), and telephone directory assistance operators(n=113). Results from univariate analyses indicated that all demographic factors, all confounders, scores for decision latitude and social support were not associated with the risk of musculoskeletal disorder. However, score for job demand was higher in musculoskeletal disorder cases than others. In subgroup analysis, this association was convinced again, in telephone directory assistance operators. Job strain model showed that the group of telephone directory assistance operators was high-stain group, and OR of musculo skeletal disorder was 2.446(95% C. I. : 1.174, 5.096), when comparing this with the low strain group. In conclusion, job strain is a risk factor for work-related musculoskeletal disorder.

중학교 체육교육 내용의 국제적 비교 연구

백종수 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.6

This study was to present new alternative plans, which would be able to overcome impending problems in that a new curriculum is made. For this, physical education contents of the Korean middle school were compared with those of American, England, Australian, and Japanese middle school. The results of this shows that the physical education contents would be desirable to be changed as follows: First, we need to select and organize concept-oriented, or subject-oriented contents in order to add new contents into physical education of the middle school. Second, need to present the national standards of performance and assessment about the physical education contents in unit of school or school year. Third, need to introduce essential contents of the physical education into our traditional physical education. Fourth, need to introduce new and various teaching and learning contents of physical education such as adventure or exploration activities, self-control activities, camping-training activities, extreme-sports activities, hip-hop dance, dance-sports, cycling, gymnastics or yoga for the diet and beauty etc. Fifth, need to contain deepening-learning contents suited to student level.

혈소판 농축 혈장이 임플란트 주변 골형성에 미치는 효과에 대한 연구

백명환,한석환,권종진 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.1

Various methods have been used to fill in the defects around the implants. Recently, researchs of developing and purifying various growth factors, and efforts to apply these growth factors in clinical situations have been carried out. Among those tries, platelet-rich plasma(PRP) containing abundant PDGF and TGF-β obtained by the sequestration and concentration of platelets by the gradient density centrifugation became one of the popular and preferred methods becuase of relatively simple procedure and abundant growth factor components. Bone morphogenic protein(BMP), platelet-derived growth factor(PDGF), and transforming growth factor-beta(TGF-β) are growth factors in the PRP that promote the bone formation. To elucidate the effects of PRP on the bone formation in peri-implant bone defects, twenty-seven Steri-Oss implants were inserted in the mandibular premolar areas of 8 adult dogs and artificial bone defects(3×4×4㎜) were prepared at the buccal side of the implants in 1st premolar, at the distal side of the implants in 3rd premolar. The control groups were filled with bovine bone grafts without PRP, and the experimental groups were filled with bovine bone grafts with PRP. Animals were sacrificed at 1, 2, 4, 8, and 12 weeks after the operation and speimens were observed by light and electron microscope. The results were as follows. first, the bone formation was observed at 1st week in the experimental groups, but at 2nd week in the control groups. second, the mature bone was observed at 4th week in the experimental groups. but 8th week in the control groups. the bone growth rate of experimental groups was more rapid than that of control groups. third, at 12th week, bone density ratio was higher in the experimental groups(71.65%) than that of the control groups(48.49%). fourth, Grafted bovine bone were almost completely absorbed at 1st week in experimental groups, but it was still present at 8th week in control groups. From the above results, PRP may accelerate the formation of new bone by promoting absorption of the graft material and increasing the growth rate of bone.

석유화학공장의 비상대응계획을 위한 정량적 위험성 평가

白腫培 충주대 산업과학기술연구소 2000 産業科學論文集 Vol.8 No.-

The Liquefied Petroleum Gas storage facility on OO Petrochemical Corporation is a hazardous facility causing huge disasters on the internal factory and neighbor residence. Because Liquefied Petroleum Gas has physical/chemical characteristics such as high flammability and explosion and a storage vessel in this factory stores more than 500 ton. So it is important that they know an accurately damage distance which they can expect when accidents occurred. In this research, we performed Quantitative Risk Assessment to Liquefied Petroleum Gas storage facilities on OO Petrochemical Corporation and proposed proper safety response plan. We use the method from the Guideline for Chemical Process Quantitative Risk Analysis(Center for Chemical Process Safety of the American Institute of Chemical Engineering) and the PHAST Professional from the DNV Technica. If BLEVE(Boiling Liquid Expanding Vapor Cloud) happens, the radiant heat is 4.0kw/m2 and damage distance is more than 1,910m, even though it depends on storage material such as propane, butane and propylene. So it can damage enormously to the total factory. An actual damage distance, though, may decrease fairly because of process equipments and lots of barrier effect such as buildings, woods, and contour (line) differences. In the case of cosmos area, it has serious potential risk due to VCE(Vapor Cloud Explosion), Pool fire, and Jet fire as well as BLEVE Therefor we proposed that they need a active safety management such as a systemically emergency response plan and a safe system design essentially,

MLL을 이용한 도시가스 시설의 안전 정보 시스템 구축에 관한 연구

白種培 忠州大學校 1998 한국교통대학교 논문집 Vol.33 No.1

Recently, demand of fuel gas has increased continuously due to its cleanness and convenience. However, accidents in the use of fuel gas have occurred in various patterns. Especially, the major accidents such as explosion and fire affected broad area and resulted in huge loss of lives and properties. The purpose of this study is to develop the safety information system which provides data of quantitative risk assessment for the prevention of accidents and for the efficient shaving and managing of the system. In this study, a computerized prototype of PISM(Pipeline Information System by Multimedia), which is essential to Transportation Risk Management, was developed as a main system to handle safety information. The PISM makes it easier to get information of quantitative risk assessment and to promote the prevention plan of fuel gas facilities. In addition, the risk assessment results can be shown on the map and provide better understanding to users.

염소(Cl₂) 투입시설에 대한 누출가능성 예측

백종배 忠州大學校 2004 한국교통대학교 논문집 Vol.39 No.1

Likelihood analysis was used for the revision of release probability / frequency in chlorine Injection facilities used in chlorine process. Typically these facilities consist of pressure cylinder, vaporizer, pipeline, measuring equipment and safety equipment. This paper described the incident scenarios considered, likelihood analysis procedure and the selection and application of basic events and for failure rates of mechanical components. Human errors were also considered. The major objective of this paper is to estimate the likelihood of each determined incident scenarios.

충주시에서의 LPG 탱크로리 수송중 위험성 평가에 관한 연구

白種培,李聖一 忠州大學校 1997 한국교통대학교 논문집 Vol.32 No.1

The demand of LPG and LNG will increase continuously due to high calories, clearness, and convenience for usage. These gases are used widely for power plants, industrial plants, and domestic fuel. But accidents related with gas are increasing in proportion to the increment of gas usage. Especially, LPG has high ignitability due to a weak dispersion to air and an accumulation at low place because LPG is heavier than air. There are many hazards during transportation as well as production, storage, and usage of LPG. Commonly, tanklorry is used for inland transportation of LPG. If tanklorry were to raise leakage incidents and then LPG is released during transportation, it will have serious effects on the environment as well as human damage to surrounding area. In this study, therefore, hazards which cause LPG of tanklorry to leak during transportation were identified and the risk of LPG transportation was assessed quantitatively. Accordingly, the result of this study might be a useful measure for predicting damage and preparing safe transportation strategies of LPG tanklorry.

Assembly Language를 이용한 직렬 통신

백순흠,박종원 충남대학교 자연과학연구소 1992 忠南科學硏究誌 Vol.19 No.2

The serial port on the microcomputers is a communication link to other computers or device including modems and serial printers. The serial communication is economic and simple method rather than parallel communication in installment and design. Up to now, the serial port has been used to designate the computer's serial interface to the outside world. So, we study and implement the basis of communication (the serial communication) for he future study (parallel communication)

네가지 방향정보를 이용한 인쇄체 영문자와 숫자의 인식에 관한 연구

백순흠,박종원 충남대학교 1990 忠南科學硏究誌 Vol.17 No.1

In this paper, we describe the PLSE(Park's Line Segment Extraction) algorithm which recognizes printed multi-font alphanumeric characters. This algorithm is the new method which uses four-directional and length information to obtain features of the characters. By using the four-directional information of the characters, the recognition rate and the speed are increased and the separated characters("i","j") and the font types are recognized, which was impossible in the past.

Pyriminobac-methyl과 azimsulfuron 합제의 신규제형인 분산형 정제에 대한 독성 평가

백경진,이동연,이상훈,김태원,정두순,임종환,김명석,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

Dispersible tablets disintegrate either to form a stabilized suspension rapidly in water, or to disperse instantaneously in the rice field without the aid of water. In this study, the newly formulated dispersible tablet form of herbicidal combination, pyriminobac-methyl and azimsulfuron, was evaluated the safety for human and animals in the toxicological viewpoints. The LD_(50) value of dispersible tablet form for pyriminobac-methyl and azimsulfuron was above 2,500 mg/kg for the oral route and above 2,000 mg/kg for the dermal route. It is considered to have low acute oral and dermal toxicity based on the findings of the present studies. In addition, the combination of pyriminobac-methyl and azimsulfuron showed mild skin irritant under the conditions of this study and conjunctival redness and slight opacity on cornea appeared from 1 hour after application.