부산·울산·경남지역 직업병 감시체계

김정일,김병권,김정원,채창호,이철호,강동묵,김지홍,김진하,김영욱,이영하,이지호,김정호,윤형렬,유철인,정백근,장태원,김운규,윤동영,강진욱,김종은,안진홍,이동준,장준호,이광영,송혜란,최영희,이용환,조병만,최홍렬,고상백,김은아,이유진,홍영습,정갑열,김정만,김준연 大韓産業醫學會 2004 대한직업환경의학회지 Vol.16 No.1

Objective: Occupational medicine specialists in the Busan, Ulsan and Kyung-Nam areas established an area-based occupational disease surveillance system and used this system to collected case information for the purpose of preventing occupational diseases Methods: l l hospital participated in this system. The authors selected five main diseases, which were hand-arm vibration syndrome (HAVS), work-related musculoskeletal disorder (WRMSD), occupational asthma, occupational skin disease and occupational and occupational lung cancer and established their case definitions. All cases were reported on the web, and real time analysis was conducted. Results: Between April 2001 and April 2003, 192 cases of HAVS, 118 cases of WRMSD, 33 cases of occupational asthma, 17 cases of occupational skin disease and 17 cases of occupational lung cancer (for a total of 377 cases of these five main diseases) were reported. most of the HAVS cases came from shipbuilding, and 172 of them (92.7%) were associated with grinding. Of the four main types of WRMSD, carpal tunnel syndrome (CTS) was the most prevalent with 46 cases and shipbuilding was also the main industry involved (83.9%). The ergonomic risk factors involved mainly associated with the hand. In 19 (57.6%) and 4 (12.1%) cases of occupational asthma, the agents involved. The causative agents of occupational lung cancer included Cr, welding fume, PAH, Ni, etc. 10(58.8%) of the cases were diagnosed as squamous cell carcinoma and 5(29.4%) as adenoma. Conclusion: This result showed that an area-based occupational disease surveillance system might provide an effective method of evaluating the prevalence of such diseases, however the Busan, Ulsan and Kyung-Nam provinces are too large to be treated as individual areas. Therefore, the authors suggest that each province should establish its own surveillance system.

大學綜合試驗 出題에 關한 硏究

卞烘圭,吳鎭坤,申鎔鎭,金泳喆,鄭求福,柳哲鍾,洪允杓 全北大學校 1977 論文集 Vol.19 No.-

The Comprehensive Examination for the undergraduate students is planned to adopt the Jeonbug National University for the purpose of enhancing the quality of its educational outputs. In order to effectively measure and evaluate the level of student progress toward the minimun standard as the students who have finished their general education and basic education for their major field study, the university has decided to make an item pool related to the subjects for the examination. This study is an attempt to make good items of five required courses among general education subjects which are Korean Language, English, Korean History, National Ethics. and Natural Science and are expected to be the subjects of the examination. Instead of making those items separately from the regular examination during the academic semesters, the university plans to collect and use good items from the usual mid-term and final examinations of those subjects. A key concern, in this study, therefore, is to analyze all the items used for the mid-term and final examinations of those subjects during the regular academic semesters. From the data of an about 100 sample in each subject at each time of total three tests, the difficulty index, discrimination index, the response rate of students on each item, and other general descriptive statistics are calculated and then good items are pooled for the future use for the Comprehensive Examination. Anhother important concern in this study is this study is given to the collection and analysis of controversial issues and problems on the process of operating the examination at other universities where the Comprehensive Examination is already adopted. The data from four institutions and from opinions of six participants of this study are used. The following main findidings are summarized : 1. The items have generally shown to be easy while the degree of discrimination is low. 2. Among the five subjects, Korean Language shows the highest rate of right answer (difficulty index) while English the strongest one in the discrimination index. 3. When comparing two types of test between the multiple choice and the short-answer, the latter seems to be powerful in both difficulty and discriminative. 4. The only one question of essay type test reveals clear limitations in scoring and evaluating students progress. 5. All items are constructed under the consideration of content-referenced base, not of the basis on behavioral aspect. 6. The analysis of issues and problems related to the Comprehensive Examination suggests that it is acceptable to test in terms of required subjects of general education and a few most basic subjects of major areas of study. 7. The examination can be functionally operated when it is held at the end of the first year of and before the beginning of the second year of the college years. The length of the examination is usally held from three to five hours. 8. Since the examination should be existed on the idea of criterion-referenced base rather than of norm-referenced one because of its testing the qualification of the entering behavior of students for the further study in their major field, the standard of the pass-and-failure should be set on at least 60 percent of correct answers in each subject. But there must be provided at least two additional opportunities for the make-up examination for those who failed in the first one. 9. A special committee must be established in order to deal with all the details related to the Comprehensive Examination.

공기청정기의 일부 실내공기 오염물질 제거효율에 관한 연구

이태형,김윤신,홍승철,이철민,김종철,전형진,김중호 한국환경과학회 2005 한국환경과학회지 Vol.14 No.5

In this study, we investigated PM_(10), NO₂, and 1-hydroxypyrene(1-OHP) in urine at indoor environments which are 35 houses and 20 hospitals for using air cleaner and non-using air cleaner in Seoul metropolitan area and Kyoung-gi province from April, 2003 to February, 2004. Moreover, we examined effect of improvement for indoor air quality and health effect by concentration of 1-OHP also we investigated removal efficiency by air cleaner for PM_(10), NO₂, and 1-OHP that were 28.5%, 27.4%, and 42.1% respectively. Concentration of PM_(10), NO₂, and 1-OHP were 19.02±18.14μg/m³, 8.66±3.06ppb, and 0.19±0.18μg/g creatinine when air cleaner was no worked. The concentration for PM_(10), NO₂ and 1-OHP were 13.60+10.79μg/m³, 6.29±2.71ppb, and 0.11±0.10μg/g creatinine, respectively. It was significant statistically. Therefore, it is considered using the air cleaner to remove the partial pollutants in indoor environment and is positive effect for health.

구리 지역에서 조사한 고혈압의 인지도, 치료률 및 관리률

홍철호,김순길,홍택원,이제,신진호,이재웅,김경수,김정현,임헌길,이방헌 대한간질학회 2003 대한간질학회지 Vol.9 No.1

장기증분원가의 산출과 활용에 관한 비판적 검토 : 통신산업의 사례 A Case of Telecommunication Industry

홍철규,안태식 대한경영학회 2003 大韓經營學會誌 Vol.16 No.5

Traditionally, regulators have relied on accounting-based historical costs for price regulation in regulated industries including telecommunications, electricity and gas. With the introduction of competition, however, the economic cost called 'long run incremental cost (LRIC)' is increasingly being adopted in these fields. This study critically analyses and discusses from the accounting and economics perspectives the 'standard cost model' which was recently developed to compute LRIC in the Korean telecommunications industry. A special attention is paid to the issues: assumptions about the degree of efficiency, departure from economic capital costs, errors on the limited utilisation of cost drivers and cost estimation, capacity costing and sensitivity, unbalanced burden of risk(real option). This cost model produces costs conceptually different from accounting costs. However, accounting scholars need to pay attention to the economic cost model as it is an important case where the abstract concept of an economic cost was applied to a real world situation. In addition, LRIC has relevance to strategic management accounting since LRIC is conceptually similar to the costs which new efficient entrants would incur and thus allows firms to understand their competitive positions. This study has also important implications for management accounting practitioners who are expected to provide cost information of the firm itself as well as outside information including regulatory environment, competitors' strategies, and new production processes and technologies etc.

수은함량과 응축압이 치과용 아말감의 표면조도에 미치는 영향

홍운표,김철위 대한치과기재학회 1984 대한치과재료학회지 Vol.11 No.1

A comparative investigation on surface roughness of four kinds of dental amalgam, three of those were manufactured in Korea, has been done for variations in mercury content and condensation pressure. Three different mercury content-the normal, recommanded level and 5% more and less than this and two condensation pressure-10MPa and 14MPa were selected. And surface roughness of amalgams in three conditions-(1) unpolished, (2)metallurgically polished, and (3) polished with pumice and zinc oxide paste, was measured with a Surface Profile Recorder. From the experiments, the following results were obtained; 1. In every case, no statistical differences were found in surface roughness for the variation of condensation pressure. 2. Atomized high copper amalgam showed the highest surface roughness for the level of 5% mercury less than recommanded, but conventional lathe cut and admixed amalgams didn't show much difference in surface roughness for the variation of mercury content. 3. When metallugically polished, each amalgam showed the highest surface roughness for the level of 5% mercury less than recommanded. 4. In all of the cases, there wasn't much difference between surface roughness for the recommanded mercury level and that for the level of 5% mercury more. 5. In case of the recommanded mercury content, there wasn't much difference in surface roughness for the types of amalgam alloys.

8×8 bit 직병렬 플러쉬 승산기의 설계 및 구현

홍경호,김철우,서희돈 嶺南大學校工業技術硏究所 1992 연구보고 Vol.20 No.2

Multiplier is a very important arithmetic component which performs an essential function in many digital computing systems. In this paper, the flush multiplier is proposed, which each data bit is come in serially is multiplied by coefficient bits, and is capable of k-bits production in k clocks. The proposed multipliers are able to perform the parallel multiplication fast and area-efficiently, and they are faster then the parallel multiplier using some algorithm which has been known as very fast algorithm.

아파트단지의 입지특성 및 물리적 구성의 차이에 따른 단지내 상가의 규모 및 업종설정에 관한 연구

김철홍,박재홍 수원대학교 산업기술연구소 2004 산업기술연구소논문집 Vol.19 No.-

In order for the practical guideline in preforming of new housing development project, we've investigated the number and uses of commercial facilities in apartment housing estate depending on the location conditions and the physical state. We've found that the service facilities are given much weight in the all commercial facilities comparing to the purchasing one. Furthermore under the multi-regression analysis, we've confirmed that it is proportional to the area of housing estate, the average size of dwelling unit and the distance from the central business area. Through the calculation of LQ(Locational Quotient), we've recognized the differences in use depends on the locational conditions and the physical state. In conclusion, most bakeries and photo shops are placed far from the central business area. Thc general businesses and hospitals are also mostly located in the larger housing area, on the contrary, book stores, video shops, or restaurants are located in the higher density area.

建設工事의 情報化 管理 시스템 構築

김홍철,장원석 서울産業大學校 1998 논문집 Vol.47 No.1

In carrying out the construction work, there are so many coordinated units of organization. They include client, engineer, supervisor, contractor and subcontructor. Also the information which are required and derived during the construction are wide and diverse. Therefore, in order to construct the rational process that promote the synthesis of qualified construction products and establish the competitiveness, it is necessary that the construction well established construction management which is capable of rapid communication of various information occurred in scheduling, planning and construction process. This study presents that the construction of information management system to share and to communication one each other in a real time.

반응소결에 의한 근사기본형 Al₂O₃/ZrO₂복합체의 제조 및 치밀화

김철진,박홍래,신동우 慶尙大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.13 No.-

Al₂O₃/ZrO₂ composites were fabricated by the reaction bonding process. Starting materials of 20-70 vol% Al, 10-65 vol% Al₂O₃, and 15-20 vol% ZrO₂ were milled for 8 h using attritor with ZrO₂ball media and isostatically pressed into the rectangular shape. The compacts were heat treated with two steps at the temperatures of 1000-1200℃ and 1400-1650℃ for 3-12 h with the heating rates of 1℃ /min and 1-5℃ /min, respectively. The sintered specimens showed the relative density of 95% to the theoretical value with the linear shrinkage of 10.5%. The large pores and cracks were not observed in the sintered body.