유년기 안구적출술 및 방사선치료로 인하여 발생된 안와 열성장에 대한 재건 치험례

홍관석,김성문,김훈,임재석,최미숙,최성원,권종진 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.1

There are many reports of the surgical management for the craniofacial abnormalities arising from the irradiation of the head and face for treatment of childhood cancers. Since the mordern combined-modality theraphy for childhood cancers began in the late 1960s and the early 1970s, recent reports have described the occular, dental and maxillo-facial abnormalities after irradiation in long-term survivors of cancers of the head and face. The resultant deformities may be known to be difficult to reconstruct with surgical techniques. This paper describes the late reconstructive surgery for the unilateral orbital and malar hypoplasia after eyeball enucleation and irradiation during childhood to correct the facial asymmetry and expand the contracted orbital socket into the functional dimension for the retaining eyeball prosthesis with spherical implant. We reports the satisfactory preliminary results from the midfacial osteotomy through the supero-lateral orbital rim and malar bone and the antero-lateral repositioning with the autogenous bone grafting in 26 year-old female patient who will be planned to make the new eyeball prosthesis by the department of ophthalmology.

Wall-Bed 디자인에서의 인간공학의 적용

이관석 외 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-

지속적으로 증가하고 있는 침대의 보급은 젊은 세대의 서구화 된 의식의 영향과 풍족한 경제력 등을 바탕으로 확산되고 있으며, 새로움에 대해 혁신적으로 대처하는 생활 양식은 기존의 것과는 다른 무엇인가를 원하고 있다. 그런 의미에서 본 Wall Bed에 대한 연구는 국내 침대시장의 Wall Bed 진입에 시작점이 될 수 있을 것으로 기대되며 소비자 욕구에 보다 부합되는 제품을 개발한다는 데에 큰 의미가 있다 하겠다. 따라서 본 연구는 Wall Bed에 대한 세부적 환경 조사와 실제 제품을 사용한 소비자 조사를 통하여 보다 소비자 욕구에 충족되는 감성적 디자인을 개발하며, 제품 사용성에 대한 안전성 향상과 Wall Bed의 조립/해체 작업을 보다 용이하도록 제품을 개선하는데 그 목적이 있다.

근골격계질환 감소를 위한 인간공학적 Intervention : 사례연구 : K Motors Case study : K Motors

李寬錫,金在炯 弘益大學校 科學技術硏究所 2005 科學技術硏究論文集 Vol.16 No.-

This objective of this study is to present a desirable direction of an ergonomic intervention for the prevention of the musculoskeletal disorders by analyzing the ergonomic prevention effort and the number of patients who suffer from a musculoskeletal disorder. The safety and health data obtained from three K motors' factories were analyzed. We also used the Lickert's scale and Focus Group Interviews. Among the three factories, the G factory shows the lowest rate of the accidents(1.01%), the highest score of the scale and Focus Group Interviews (6.4 points) and field improvement reflecting the hazard analysis(97%), and it became the best factory (6.8 points) among the three factories that complied with the safety and health law by using an ergonomic intervention. A correlation analysis shows that the ergonomic intervention (the field improvement & the compliance with the law) is relevant to the decline of the accident's rate (r=-0.91 and -0.98) and the increase of the subjective evaluation by company experts (r=0.98 and 0.99).

DBD 반응기에서 플라즈마 방전형태에 따른 PFC_(s) 가스의 분해 특성

김관태,김용호,차민석,송영훈,김석준,류정인 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.5

Perfluorocompounds(PFC_(s)), such as tetrafluoromethane (CF₄) and hexafluoroethane (C₂F_(6)), have been widely used as plasma etching and chemical vapor deposition (CVD) gases for semiconductor manufacturing processes. Since these PFC_(s) are known to cause a greenhouse effect intensively, there has been a growing interest in reducing PFC_(s) emissions. Among various CF₄ decomposing techniques, a dielectric barrier discharge (DBD) is considered as one of a promising candidate because it has been successfully used for generating ozone (O₃) and decomposing nitrogen oxide (NO). Firstly, optimal concentration of oxygen for CF₄ decomposition was found to figure out how many primary and secondary reactions are associated with DBD process. Secondary, to find effective discharge method for CF₄ decomposition, a streamer and a glow mode in DBD are experimentally compared, which includes (ⅰ) coaxialcylinder DBD, (ⅱ) DBD reactor packed with glass beads. and (ⅲ) a glow mode operation with a helium gas. The test results showed that optimal concentration of oxygen was ranged 500 ppm~1% for treating 500 ppm of CF₄ and helium glow discharge was the most efficient one to decompose CF₄.

심한 골병변으로 발현된 기능성 낭종성 부갑상선 선종

전숙,김영희,박지영,고관표,박철영,김덕윤,우정택,김성운,김진우,김영설,고석환 대한내분비학회 2003 Endocrinology and metabolism Vol.18 No.2

낭종성 부갑상선 선종과 심한 골병변을 동반한 부갑상선 기능항진증은 매우 드문 질환으로서, 저자들은 양측 고관절의 통증을 초기 주소로 내원한 환자에서 고칼슘혈증과 부갑상선 호르몬 증가, 골병변의 방사선적 소견을 통해 부갑상선 기능항진증을 진단하고, 경부 초음파와 컴퓨터 단층 촬영, 부갑상선 스캔검사 및 수술중 부갑상선 낭종액 검사 등을 통해 기능성 부갑상선 낭종의 한 종류인 낭종성 부갑상선 선종을 진단하고 수술적 제거를 통하여 정상화된 1예를 경험하였다. A cystic parathyroid adenoma is rare. A case of primary hyperparathyroidism, with the cystic formation of a parathyroid adenoma and a severe bony lesion, is reported. A 52-year-old male was admitted due to pain in both hips and for evaluation of hypercalcemia. The plasma level of the intact parathyroid hormone (iPTH) was elevated to 1424 pg/mL. Ultrasonography and the computed tomography revealed a parathyroid cyst on the left thyroid lower pole. Parathyroid scintigraphy detected a parathyroid adenoma. A radiograph showed a subperiosteal bone resorption on the phalanges, and a brown tumor (osteitis fibrosa cystica) on the femur shaft was noted. A surgical excision of the parathyroid adenoma was performed. The PTH level in the cystic fluid was increased. A histological examination confirmed a cystic parathyroid adenoma. The PTH level was normalized after the operation (J Kor SOC Endocrinol 18:214-220, 2003).

직접추정법에서 작업평가에 대한 기준작업 변화의 영향 연구

양진석,이관석 弘益大學校 科學技術硏究所 1996 科學技術硏究論文集 Vol.7 No.2

Among various method in determining the maximum acceptable weights of lift(MAWL), the psychophysical method has been popularly used for the infrequent but repetitive lifting. This method still takes substantial amount of time in case there are many different combinations of tasks. To further shorten the time taken to determine MAWL's for different tasks, the direct estimation method which employs the ratio scale between the person's feeling of stress in lifting has been used. However, no study was conducted about the standard lifting task which is used as a basis for the scale in the direct estimation method. Therefore, the effect of different standard lifting tasks to the MAWL in certain lifting situations was studied in this research. Four lifting frequencies(1,2,4, and 6 lift/min) were tested in two different lifting situations(Floor to knuckle, Knuckle to shoulder) in a laboratory. It was found that the MAWL determined in the task of 1 lift/min showed the closest value to the MAWL determined by the psychopysical method in the floor to knukle lifting situation. The MAWL in the task of 4 lift/min also showed the closest value to the MAWL obtained by the psychophysical method in the knuckle tl shoulder lifting situation.

연령증가와 성별에 따른 아이콘 인식력의 차이에 관한 연구

李寬錫 弘益大學校 科學技術硏究所 1994 科學技術硏究論文集 Vol.5 No.-

This paper described the influence of the age & sex on the perception of icons and established an icon design guideline for software development. The number of older persons in the population is increasing and will continue to rise in the next few decades. Since the use of computers is prevalent within jobs, use of computers by the elderly is a significant issues which must be addressed by employers and system designers. It is important to understand what types of computer tasks are appropriate for older workers and how these tasks should be designed to accommodate changes in ability which occur with occur with age. In this study, 23 college students and 30 older persons were tested to test icon acceptability 135 icons in MS-Windows system were used. Icons were classified by job characteristics, depictive method, color and boundary. Older persons made a lower acceptability than college students. There was a significant icon characteristics which affected icon cognition. The results of the acceptability test were analyzed and used to establish a guideline which can be use to develop icons.

효율적인 2인 들기 작업을 위한 고찰

이관석,이준한 弘益大學校 科學技術硏究所 1997 科學技術硏究論文集 Vol.8 No.-

정신분열증에서 신경증적 증상의 임상적 의의에 관한 연구

박병관,신석철,강민희,신윤오 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.1

To investigate the clinical significance of the neurotic symptoms in schizophrenia, the author applied PSE(Present State Examination) on Screening Schedule to 153 schizophrenic patients who were fit for the aim of this study. The patients were divided into two groups to grasp the phenomenological characteristics as the group with neurotic symptoms (100 cases) and the group without neurotic symptoms(53 cases). Among 91 items except neurotic symptoms in PSE, 14 items were selected as significant under X²-test, and tried factor analysis with 14 items using SPSS/PC+. The results of this study were summarized as follows. 1. In the group with neurotic symptoms, 4 factors were extracted as slowness of speech and behavior and blunted affect factor, inappropriate answer and affect factor, delusion factor, and restricted and poverty of speech factor. In the group without neurotic symptoms, 5 factors were extracted as slowness speech and behavior and incoherence factor, inappropriate and poverty speech and self-neglect factor, delusion factor, inappropriate affect factor, and loss of affect factor. In the group of total patients, 4 factor were extracted as restricted and slowness of speech and behavior and blunted affect factor, delusion factor, inappropriate and poverty of speech and inappropriate affect factor, and incoherence factor. 2. In the group with neurotic symptoms, slowness of speech and behavior, inappropriate answer, blunted and inappropriate affect were the major symptoms and inappropriate answer and affect, delusion, restricted and poverty of speech were the minor symptoms. Among these symptoms, slowness restriction, poverty of speech and behavior, inappropriate answer and characteristic blunted affect were characterized by negative symptoms(i.e. defect state) which were frequent in chronic schizophrenia. 3. In the group without neurotic symptoms, slowness of speech and behavior, incoherence, and self-neglect were the major symptoms and inappropriate and poverty of speech, delusion, inappropriate and loss of affect were the minor symptoms. Among these symptoms, slowness and inappropriateness of speech and behavior, and characteristic incoherence and self-neglect were characterized by positive symptoms which were interpreted as less distorted reality than the group with neurotic symptoms in the process of schzophrenia. 4. In the group of total patients, restricted and slowness of speech and behavior, blunted affect and delusion were the major symptoms and inappropriateness, poverty and incoherence of speech, and inappropriate affect were the minor symptoms, which were composed of the major and the minor symptoms of the group with neurotic symptoms and without neurotic symptoms. These symptoms can be seen frequently in the diagnostic criterias and clinical practice and thought to be the result of the major symptoms common in schizophrenia regardless of he presence of neurotic symptoms.

成長期 어린이의 步行狀態分析

田寬錫,洪盛杓 忠南大學校體育科學硏究所 1984 體育科學硏究誌 Vol.2 No.1

In order to comprehend the walking situations of the children in a growing period and to offer basic materials for a right walking guidance, I measured and analysed the step angles and vertical difference between both steps of a primary school's students (mas.: 380 persons, fem.: 340 persons). The following results were obtained ; 1. According to the measurement of step angles and vertical difference between both steps and its analysis, there were no changes by ages. 2. In the walking angles, a right foot is more foot -outside lined than a left one, and boys are more foot - outside lined than girls. 3. Boy students walk more widely than girl students in vertical difference between both steps. 4. While walking, children whose both feet are foot- inside lined and overlap each other, and whose both feet are foot-inside and are open, are much more. 5. A walking habit of child remains unchanged up to adult.