수도수중 염소 소독부산물로 인한 건강위해성 평가에 관한 연구 : 서울시 수도수중 Trihalomethanes 및 Haloaceticnitriles을 중심으로

정용,신동천,양지연,박연신,김준성 한국환경독성학회 1997 환경독성보건학회지 Vol.12 No.2

Public concerns about hazardous health effect from the exposure to organic by-products of the chlorination have been increased. There are numerous studies reporting that chlorination of drinking water produces numerous chlorinated organic by -products including THMs, HAAS, HANs. Some of these products are known to be animal carcinogens. The purpose of this study was to estimate health risk of DBPs by chlorinated drinking water ingestion in Seoul based on methodologies that have been developed for conducting risk assessment of complex-chemical-mixture. The drinking water sample was collected seperately at six water treatment plant in Seoul at March, April, 1996. In tap water of households in Seoul, DBPs were measured with the mean value of 36.6 μg/L. Risk assessment processes, which include processes for the estimation of human cancer potency using animal bioassay data and calculation of human exposure, entail uncertainties. In the exposure assessment process, exposure scenarios with various assumptions could affect the exposure amount and excess cancer risk. The reference dose of haloacetonitriles was estimated to be 0.0023 mg/kg/day by applying dibromoacetonitrile NOAEL and uncertainty factor to the mean concentration. In the first case, human excess cancer risk was estimated by the US EPA method used to set the MCL (maximum contaminant level). In the second and third case, the risk was estimated for multi-route exposure with and without adopting Monte-Carlo simulation, respectively. In the second case, exposure input parameters and cancer potencies used probability distributions, and in the third case, those values used point estimates (mean, and maximum or 951!!i) upper-bound value). As a result, while the excess cancer risk estimated by US EPA method considering only direct ingestion tended to be underestimated, the -risk which was estimated by considering multi-route exposure without Monte-Carlo simulation and then using the maximum or 95% upper-bound value as input parameters tended to be overestimated. In risk assessment for Trihalomethanes, considering multi-route exposure with adopting Monte-Carlo analysis seems to provide the most reasonable estimations.

상수의 염소처리시 생성되는 소독부산물 중 Haloacetic acid류의 생성능에 관한 연구 : 일부 상수원수를 대상으로

정용,신동천,임영욱,김준성,박연신 한국환경독성학회 1997 환경독성보건학회지 Vol.12 No.2

The main reason of applying chlorination is to sterilize microbes existing in the drinking water treatment. But chlorination could lead to the formation of disinfection by-products (DBPs) by the reaction of free chlorine with humic substance in the water. Especially the DBPs including trihalomethanes (THMs), haloacetic acids (HAAs), haloacetonitriles (HANs), and haloketones (HKs) exist in the tap water. The US environmental protection agency (US EPA) defines that trihalomethanes, dichloroacetic acid, trichloroacetic acid, and dichloroacetonitrile among DBPs are probable/possible human carcinogens. US EPA suggests maximum contaminant levels (MCLs) for THMs (80 μg/L) and HAAs (60 pg/L) in drinking water. In Korea, THMs in drinking water has been surveyed but DBPs in general has not been studied in drinking water practically. Therefore only THMs have been regulating as criteria compounds since 1990 but neither HAAs nor HANs. Researches on HAAS are yet to be found. HAA formation potentials (HAAFPs) have not been practiced. HAAS depends on the characteristics of water sources by chlorination. In this study, HAAFPs from three distinct sources were investigated by laboratory chlorination experiments. This study was performed to measure the level of HAAS in drinking water in Seoul area. At April 1996, after collecting the raw waters from the three sites with the different properties, the water samples were chlorinated at various conditions (pH 5, 5, pH 7.0 and without pH adjustment) in the state of raw water to have 0.5 mg/L of residual chlorine concentration. And the raw water, treated water, and tap water of water treatment were collected to measure the HAA, concentration. The quantitative analysis of IIAAs was conducted by US EPA methods. After 48 hours of chlorination, The IIAAFPs ranges of measured level of pH 5.5, pH 7. 0, and without pH adjustment were 11.0~48.7ppb, 9.4~60.7ppb, and 4.5~50.0ppb., respectively. HAAFPs was increased with the reaction time. In tap water of households in Seoul, HAAS was measured with the mean value of It. 71 ± 1. 11 ppb. Among the HAAFPs, dichloroacetic acid and trichloroacetic acid as the hazardous compounds are measured at higher value. Based on above results, the health risk assessment of DBPs should be undertaken in urgently for the management process for the standard.

카올린으로부터 질화알루미늄 분말 합성

이윤복,서기원,류봉기,김광호,박희찬,장윤식 釜山大學校生産技術硏究所 1996 生産技術硏究所論文集 Vol.50 No.-

카올린으로 부터 수화염기성황산알루미늄을 제조하고, 이것을 탄소열환원질화하여 질화알미늄 분말을 합성하였다. 수화염기성황산알루미늄은 카올린으로 부터 제조된 수화황산알루미나 0.5M 및 요소 5M인 용액으로 부터 얻은 것이 가장 미세하였다. 탄소열환원질화법으로 질화알미늄을 합성할 때 활성화탄과 염기성황산알루미늄의 질량비가 2인 조성이 가장 적합하였으며, 이 때 얻어진 질화알미늄은 0.3-1㎛의 submicron급 분말이었다. Aluminum nitride powder was synthesized by carbothermal reduction-nirtridation using kaolin- derived hydrated basic aluminum sulfate. The hydrated basic aluminum sulfate powder produced from the solution of 0.5M hydrated aluminum sulfate and 5M urea showed very fine particles. The aluminum nitride showed the submicron powder of 0.3-1㎛ in the optimum condition with 2.0-weight ratio of activated charcol to hydrated basic aluminum sulfate.

토마스 만의 시 - 시적 자아의 형성 및 변천 양상을 중심으로

김륜옥(Yuon Ock Kim) 한국괴테학회 2001 괴테연구 Vol.13 No.-

화학물질 안전관리 DB 구축 및 정보시스템 개발

박연신(Yuon Shin Park),황만식(Man Sik Hwang),노혜란(Hye Ran Noh),천광수(Kwang Soo Chun),김성범(Sung Bum Kim) 한국위험물학회 2013 한국위험물학회지 Vol.1 No.1

As the continuous growth of chemical use and chemical industry, the probability of chemical-accident and human exposure also increases. Owing to recent successive chemical accidents, public anxiety and concern about chemicals is increasing. If a chemical accident occurs, it is important to rapid and appropriate first respond based on accurate substances information. The Ministry of Environment as the lead agency managing chemicals need to set systematic management strategies to prevent chemical accidents and to minimize injuries caused by accidents. Thus, 6,770 substances in the domestic legal system of chemical safety management DB has built. Web-based information system was developed to enhance the accessibility and usability of DB. In this article, we discussed and introduced development of chemical database and information system for safety management(KISChem; Korea Information System for Chemical safety management). This product may be useful for enhancing our capability of preparedness and prevention for chemical accidents.

한국수어(KSL) 전문용어사전의 구축 방법론 연구

윤석민(Yuon, Soeg-min),채규현(Chae, Gyu-hyeon) 국어문학회 2018 국어문학 Vol.67 No.-

본 연구는 한국수어의 특성을 반영한 한국수어 전문용어사전 구축을 위한 방법론을 제안하고 있다. 이를 위해 본 연구는 사전을 구축할 전문 분야를 설정하고 용어를 수집하기 위한 조사 연구를 실시하였다. 구체적으로 한국수어 화자를 대상으로 한 조사를 통해 ‘볼링’과 ‘축구’를 전문 분야로 설정하고, 방법론 수립을 위한 전문용어를 수집하였다. 본 연구에서는 이렇게 조사된 용어를 중심으로 사전 구축을 위한 방법론을 수립하였다. 특히 방법론은 표제어 선정·표기·배열과 관련되는 거시구조와 뜻풀이 기술과 관련되는 미시구조로 나누어 구체적인 방법론을 제안하였다. 이러한 연구를 통해 한국수어 전문용어사전은 기존 사전의 방법론을 수용하되, 한국수어만의 특성을 적절하게 반영하여야 함을 강조하고 있다. This study aims methodology of construction of Korean Sign Language Dictionary of Terminology, reflecting characteristics of Korean Sign Language. For this purpose, this study surveyed Specialty fields and terminology to construct dictionary. Specifically In this survey with Deaf peoples, this study selected ‘bowling’ and ‘soccer’ to specialty fields to construct dictionary. And this study collected terminology for establishment of methodology. This study established of methodology to construction of dictionary with collecting terminology. Especially, this study aimed methodology that composed of macro structure, related to selection·description·arrangement of headword, and micro structure, related to interpretation. In conclusion, We insist that Korean Sign Language Dictionary of Terminology must reflect characteristics of Korean Sign Language.

공업계고등학교 실습 교과의 내용 선정과 운영방안

권윤원(Yuon Won Kwon),김기수(Ki Soo Kim) 대한공업교육학회 1998 대한공업교육학회지 Vol.23 No.2

The aims of this study are to examine how the teachers select and manage the contents of the subject, 『practical training of technology』 , in the technology affiliated department of technical high school, and to find schemes of selection and management of the practical training for the technology-affiliated department in the 7th high school curriculum. The results of this study are as follows : 1. Students can`t accomplish the objectives of the subject, 『practical training of technology』 , suggested in the current curriculum. 2. According to the current curriculum, each student practice three to six practical training circularly during one year, and select only one content among the expert training and practice it agin and again during two years. 3. According to the inquiry, more than a half of the teachers can`t teach some part among the training contents of the technology-affiliated department, suggested in the current curriculum 4. Students have to select various contents of practical training and practice circularly during two years by a semester unit, and train a wide-ranged basic knowledge and skill rather than high-leveled technology and skill in the 7th curriculum.

TRUST TOWARD THE INFLUENCER ON SOCIAL MEDIA: ITS ANTECEDENTS AND OUTCOMES

Do Yuon Kim,Hye-Young Kim 글로벌지식마케팅경영학회 2019 Global Fashion Management Conference Vol.2019 No.07

성인 농인 문해교육 체계 설립을 위한 해석적 연구

윤석민(Yuon Soeg?min),고아라(Go A?ra) 국어문학회 2015 국어문학 Vol.60 No.-

본 연구는 성인 농인 문해교육 체계를 설립하기 위한 기초 연구이다. 이에 본 연구는 먼저 성인 농인에게 한국어 문해교육을 실시해 온 전문가와 교육기관을 선정하여 성인 농인의 문해 교육 실태에 대하여 알아보았다. 구체적으로 전문가에게는 심층면담 조사를 하였고, 교육기관에서는 수업을 관찰 조사하였다. 이렇게 조사된 자료를 분석할 때에는 이중언어 교육이나 제2언어 교육에서 학습자의 특성을 파악할 때 관여하는 요소에 중점을 두어 분석하였다. 이에 언어습득 시기, 인지적 요인, 정의적 요인, 사회 · 문화적 요인으로 나누어 성인농인의 학습자의 특성을 각 요목에 맞게 정리하였다. 이러한 검토들을 바탕으로 성인 농인을 위한 문해교육 프로그램이 지향해야 할 점을 제안하기도 하였다. 특히 본 연구에서는 학습자 특성에 맞추어 농아동의 문해교육 프로그램과는 차별화된 점에 주목하여 진행되었다. 그리고 이 제언은 성인 농인을 대상으로 한 문해교육 체계를 설립할 수 있도록 교재, 교육 활동, 교육 방식, 교육 자료, 학습 동기, 사회적 거리와 같이 학습자와 직접 관련을 맺는 모든 방면에서 이루어졌다. This study was conducted as basic research for establishing a literacy education system for Deaf adults. For this purpose, this study sampled experts and educational institutions that had executed Korean language literacy education for Deaf adults, and surveyed the current state of literacy education for Deaf adults. Specifically, experts were surveyed through indepth interviews, and educational institutions through the observation of classes. When collected data were analyzed, the analysis was focused on factors related to learners’ characteristics in bilingual education or second language education. The factors were divided into the time of language acquisition, cognitive factors, affective factors, and socio‐cultural factors, and Deaf adult learners’ characteristics were analyzed according each of the factors. Based on the findings of the analysis, the directions of literacy education programs for Deaf adults were suggested. Particularly in accordance with learners’ characteristic, this study took note of differences from literacy education programs for Deaf children. For the establishment of a literacy education system for Deaf adults, furthermore, the suggestions covered all areas directly related to learners including textbooks, educational activities, education methods, education materials, motivation of learning, and social distance.

초음파 유량계를 이용한 하수관 유량 측정의 타당성 검토 연구

최연철(Yuon-chul Choi),송호면(Ho-myoen Song),조정일(Jeong-il Cho),유형식(Hyeong-sik Yu),정지승(Jee-seung Chung) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2

The Ministry of Environment announced that the year 2002 would be the first year for 'new sewer maintenance', disclosing its ambitious plan to initiate the Han River system (model) / BTL / dam upriver sewer renovation project from 2005 requiring the investment worth about 3 trillion KRW per year and a total of about 30 trillion KRW for the next 10 years. I/I(Inflow/Infiltration) is one of the Performance Indicator of Sewer maintenance project. In this study, We investigated in propriety of flow measurement using ultrasonic flowmeter in sewer for I/I analysis