한국인의 연, 망간, 알루미늄 및 실리콘의 혈중 농도

김정만,안정모,김원술,김정일,신해림,정갑열,김준연 동아대학교 산업의학연구소 2000 산업의학연구소 논총 Vol.- No.5

Blood Lead, Manganese, Aluminium and Silicon Concentrations in Korean Adults Jung Man Kim, Jung Mo Ahn, Won Sul Kim1), Jung Il Kim2), Hai Rim Shin, Kap Yeol Jung2), Joon Youn Kim Department of Preventive Medicine, College of Medicine and Industrial Medicine Research Institute. Dong-A University Department of Health Care, Handong University Sunlin Presbyterian Hotpital1) Department of Occupational Medicine, College of Medicine, Dong-A University2) 0bjectives : This study was performed to determine the reference values of blood lead, manganese, aluminium, and silicon in healthy adults. Methods : The subjects were 132 (67 male and 65 female), and classified to three age groups (≤39,40∼49, and 50≤). Hood lead, manganese and aluminium were analyzed by atomic absorption spectrophotometer, and blood silicon was analyzed by direct current plasma optical omission spectrometer. Results : Blood lead levels(geometric mean, S.D) were (3.49, 1.70) ㎍/dL in male auld (3.04, 1.65) ㎍/dL in female, but the difference is not significant, and there was no significant difference between age groups. Mean blood manganese level was 0.99±0.41㎍/dL, and there was no significant difference between sex or age groups. Mean blood aluminium level was 0.59±0.35㎍/dL and there was no significant difference between sex or age groups. Mean blood silicon level was 54.41±27.64㎍/dL in male and 43.34±23.51㎍/dL in female, and the level in male was significantly higher than that in female (p〈0.05). There was significant difference between age groups, and the oldest showed the highest level in male (p〈0.05), but no significant difference between age groups in female. Conclusions : Authors hope that this study would provide basic data for determininig reference values and evaluating health effects.

CNC工作機械 移送誤差의 發生要因에 관한 實驗的 硏究

鄭潤敎,高亥柱 國立 昌原大學校 産業技術硏究所 1992 産技硏論文集 Vol.6 No.-

The accuracy of machine tools is the major factor concerned with the accuracy of the processed work. The feed errors of feed system in machine tool, therefore, make the machining errors of work directly on processing. In this point, this study focused on the generative elements in feed errors of CNC cylindrical grinding machine, such as supporting method of ball screw, the effect of pitch and yaw error and the position detecting method in servo system when operating its shaft of grinding wheel head. Furthermore, in order to improve the accuracy of this machine tool, feed errors are measured by a laser interferometer. Results obtained in this study provide some useful informations to attain high accuracy of CNC machine tool.

토끼 傳의 變遷考

장정혜 세종대학교 국어국문학과 1975 君子語文學 Vol.2 No.-

Ⅰ.서 론 Ⅱ.「토끼傳」의 근원설화 A.印度의 설화 B.印度설화의 漢譯과정에서의 變還 Ⅲ.韓國설화에로 변천과 전개과정 A.龍兎設話 B.龍兎設話의 傳承과정 C.傳承設話의 小設에로 정착 1.時代的 背景 2.傳承設話의 정착으로 나타난 異本의 考察 3.異本에 나타난 作品의 變貌 D.開花期의 「兎의 肝」 Ⅳ.결 론

「칸트리 ·리스크」評價方法의 機能分析과 改善方向에 관한 硏究

林海正 群山大學校 1984 論文集 Vol.7 No.-

1. A scale of foreign debt in LDCs, since the oil crisis opened in 1973, have increased on an alarming scale. Particularly, debts of some prominent LDCs including Korea increased rapidly and so the proportion of loaning from a private capital was inclined to be rosed. The phenomenon which foreign debts of these LDCs rises, gives them a feeling of uneasiness about ability to pay foreign debt. On the basis of these backgrounds I could not help evaluating the redemptive ability of borrowing country, laying stress on international financial system. Therefore Country Risk evaluation is of leading importance. 2. In the method of Country Risk evaluation there was not a certain type, but every banking institution devised its special method and then made use of it. First, it is difficult to quantity objectively all elements which compose the credit rating. Second, it was no fact to be called default yet. Third, all elements constituting the creditworthiness are irregular. 3. The method of Country Risk evaluation can fall into four divisions: (1) Fully qualitative system (2) Structured qualitative system (3) Check list system (4) Highly qualitative system It is general that every banking institution chiefly takes account of specialities of all nations to be appraised, the method using qualitative analysis and all sorts of indices. First of all, the method of evaluation grades the rating by each index, and confers weight on it, and then makes use of this method which finds the comprehensive rating system. 4. I think the latest international financial situation needs to improve the method of evaluation in each banking institution besides strengthening of Country Risk evaluation. The main contents is as follows: (1) Abolition of a general risk rating system (2) Strengthening of qualitative judgment to take account of speciality of each nation. (3) Strengthening of floating evaluation (4) Strengthening of an early warning system (5) Strengthening of political risk evaluation (6) Strengthening of lending limitation 5. In Korea, service of Country Risk evaluation is not on the track in experience because evaluation system is not so many and its history is also short. But we must introduce and develop system of developed nations, as well as development of evaluation technique, and must cultivate specialists who deal with its service. Which a rapid export increase or economic development we will have to meet adequately a change of ability paying foreign debts.

敎育投資에 대한 所得推定 : 個人의 選擇이 미치는 誤差에 대한 硏究

林海正,李範烈 群山大學校 1997 論文集 Vol.24 No.-

본 연구의 목적은 학교교육에 대한 투자가 어느만큼의 소득을 실현하는가에 대하여 개개인의 선택이 미치는 오차를 고려하는데 있다. 분석자료는 미국 노동부에서 조사한 National Longitudidinal Survey of Young Men에서 발췌하였는데, 1981년에 근로소득이 있는 표본만을 대상으로 하였다. 교육의 선택을 Ordered Probit Model로 분석하여 선택오차를 수정하였는데, 그 결과 개인의 선택으로 인한 오차의 중요성이 발견되었고, 교육투자를 통한 소득효과가 기존의 방법으로 검증된 것과는 상당한 차이가 있음이 나타났다.

國際金融市場 動向과 韓國의 對應戰略

林海正 群山大學校 1983 論文集 Vol.5 No.-

International monetary market, more in recent years, has been so deteriorated that inducement of foreign capital from the market, becomes more difficult for less developed countries (LDCs) such as Korea that depend heavily on foreign savings for her development fund. Considering the changes in the market this thesis aims at reviewing the recent trends of the market and working out appropriate strategies for LDCs, especially for Korea. In these years, world economic system, plunged into a state of profound disorder, resulted in international financial crisis entangled by jumping interest rate, exchange loss, international bankruptcy. The confusion and disorder were originated from various sources related each other: The advanced countries, confronted lagging economic growth, expanding unemployment, rising oil-prise, strengthened their protectionist measures; the policy of high interest rate, maintained by the United Stated, has slackened recovery of world economy; the position of oil-producing countries was reversed from supply-side to demand-side for international fund, troubled by their financial difficulties; LDC's difficulty of public finance, due to small domestic savings coupled by their over-ambitious development plans, necessitated additional supply of credits from international monetary fund; the difficulty, in several cases, brought forth even international bankruptcy. Successful inducement of foreign capital from such a rigid market, however difficult, will be indispensable for industrialization of Korea's economy. Scrupulous plans and intensive preparations will be essential for a success story in the future. At this point, the followings may be suggested as major strategies for it. (1) Korean enterprises should, in the near future, rebuild their ownership-management relations and strenthen their financial situations by offering shares to foreign investors, and strive for recognition of their management capabilities. (2) Careful plans for good-will of international financial organizations must be prepared with the help of influencial bulletins and banking experts. (3) To get a good rank of bonds issued by the enterprises, also necessary is the cooperation between Korean enterprises and international Credit ratings companies well-known experts. (4) In case of direct financing from the market, the enterprises must seek for technical cooperation with the international monetary companies through their branches in this country. (5) Korean enterprises must have full understanding and measures on international monetary market, that is, on all details covering the choice of market, the period of bonds, interest rate, and so on. In is very difficult to move into international monetary market. Therefore, sophisticated preparations and plans toward the market will be essential for LDC's economic future. In this respect, we must seek for the necessary strategies to increase our advantages in the market, and the strategic measures must be closely related with the probale changes in world economy.

음식물 섭취에 따른 요중 마뇨산 배설량의 변화

김정일,박태혁,정갑열,신해림,김준연 동아대학교 산업의학연구소 2000 산업의학연구소 논총 Vol.- No.5

Objectives ; Urinary hippuric acid levels have been usually determined to evaluate workers exposes to toluene. Food and drink intake could affect urinary hippuric acid excretion and chi study was carried out to investigate what kinds of food and drink would affect urinary hippuric acid excretion. Methods ; The subjects were 136 medical school students. Authors measured urinary hippuric acid levels three times from 10 a. m. to noon; before, one hour after and two hours after food or drink-intake, and they were asked not to eat from the previous night(9 p. m) of testing. We selected six diets(bread and coffee, brown sauce noodle, Korean style meal, noodle, pork-galbi and rice and soybean stew and rice) , six fruits(apple, grape, orange, pear, persimmon and plum) and five beverages(Alps-D□, Demisoda□, Orange juice□, Pear juice□ and Pocari sweat□). Analysis of urinary hippuric acid was performed by high performance liquid chromatography. Results ; Intake of popular Korean diets, fruits and some drinks didn't affect urinary hippuric acid excretion. But intake of sodium benzoate-contained Alpa-D□ increased urinary hippuric acid excretion. Conclusions ; For the health examination on workers exposed to toluene, the history of diet and fruit intake can be negligible, but that of beverage intake should be included.

放射線이 생쥐生殖細胞에 미치는 影響에 關한 硏究

千基貞,柳炳善,鄭圭會,鄭海元,李鉦浩 대한방사선 방어학회 1985 방사선방어학회지 Vol.10 No.1

The objectives of present study is to investigate genetic damage of radiation in mammalian male germ cell and to establish available screening method for determining genetic hazard by radiation. Several methods were employed to measure the genetic damage of radiation as follows: Sperm head counts, frequency occurrence of sperm with abnormal head shape, fertility, activity of LDH-X, and the induction of unscheduled DNA synthesis (U.D.S.) in male mouse were performed with the passing of time after irradiation by making use of the sequence of event that occurs during spermatogenesis. Sperm head counts and activity of LDH-X in testes were gradually reduced by increased radiation dose and with the passing of the time after irradiation. Frequency occurrence of sperm with abnormal head shape, sterile period, and the induction of unscheduled DNA synthesis were increased by increased radiation dose. It is suggested that since germ cell is a direct reflection of genetic complement, the use of male germ cell is rapid and convenient method for measuring genetic damage by radiation.

韓國의 資本市場開放 擴大推進과 金融機關의 對應方案

林海正 군산대학교 지역개발연구소 1994 地域開發硏究 Vol.6 No.-

The Korean government has pursued a plan for magnifing the liberalization of the capital market as well as the liberalization of interest rates and foreign exchange as a part of financial reform policies during the period of the New 5 Year Economic Plans. Among the main contents of the liberalization of capital transaction are the early opening of the bond market as well as the stock market. As the result, the Korean Capital market is expected to have great possibilities as a center of the international financial market. Mean While, domestic financial agencies are anticipated to enter hot competition with foreign ones because of the rapid progress of the financial liberalization and stock market opening. Therefore, it is very important for government to take measures to meet the situation. Among those measures are as follows: (1) expanding of business area and business size. (2) strengthening of the capacity of risk management. (3) training of experts. (4) expanding of electronic data processing system.

다단계 자동가공/조립제조시스템에서 다목표 작업제어 기법

최정상,박해천 한국공작기계학회 1998 한국생산제조학회지 Vol.7 No.1

This paper is concentraed on a study of operation control for mutiple objectives in a automated manufacturing system with multiple machining cells or assembly cells. Largest Sum Processing-time First(LSPF) was developed in order to minimize makespan, mean flowtime and maximize mean utilization and compare with Ho and Chang's algorithm(HC) and Hunsucker and Shah's algorithm(HS). The results show that LSPF provides better soutions than HC at 78.2% and than HS at 67.8% of total problems to frequency. LSPF reduces 5.8% of makespan by HC and 22.1% of the valus by HS and curtails 15.8%, 7.5% of mean flowtime by recpective algorithms(HC, HS). And mean utilization is also higher about 5.5%, 20.8% than HC and HS.