소음성난청 유소견자들의 사후관리 실태

최장선,송재석,원종욱,강종두,차봉석,노재훈 大韓産業醫學會 1996 대한직업환경의학회지 Vol.8 No.2

The number of workers with noise induced hearing loss which comprise 56.9% in the total number of workers with work-related diseases in Korea of 1994, are becoming in position of the most serious problem. Periodic health examination system which was introduced for health care of workers on hazardous workplace has played important role in health care and the prevention of work-related diseases. The goal of periodic health examination may be obtained when we not only discover occupational disease, but also control them effectively. To study the post-examination health status of workers with noise induced hearing loss diagnosed from 1991 to 1994 in the periodic health examination, all 154 workers in 102 manufacturing factories in Banwol and Siwha industrial complex were reviewed. 1. Among 154 workers, 87 workers(56.5%) were changed to different department, 67 workers(43.5%) remained in the same department. 2. Among 102 workplaces, only 23 workplaces(22.9%) had changed their working environment while 79 workplaces(77.1%) did not. 3. In this study, post-examination health care of the workers diagnosed as noise induced hearing loss had significant correlated with the presence of health care manager, Industrial Health and Safety Committee in workplace and size of industry. The improvement of working environment is also closely related with the presence of health care manager in workplace. 4. Among 154 respondents, 3 workers(1.9%) had received compensation while 151 workers(98.1%) did not. 5. The reasons for not requesting the compensation were that 117 workers(77.5%) were ignorant of the administrative procedure for compensation, 30 workers(19.9%) were not sure of receiving compensation, 4 workers(2.6%) were busy. Considering the result of this study, we must establish the guide of management or contents of post management for noise induced hearing loss. To prevent the noise induced hearing loss, and protect the workers with noise induced hearing loss, education about post management is much required for employer and employee.

충진탑에서 가스흡수에 의한 물질전달과 수력학적 거동에 관한 연구

최동훈,김재홍,김일배,김옥택,김장호 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1

The use of packed column which apply efficient thermal material separation method has been required for absorption process. Absorption is applicable to waste gas from industrial process and incineration and odor control. Since we have used the lattice packing which was recently discovered in Germany, We can prevent drop of efficiency from maldistribution and channeling which were occurred when we use conventional packing. The lattice packing is efficient within the range of thermal, easy to manufacture, low production cost and make a variety of materials. This study aims to control the waste gas and odor with absorption. The dimension of packed column in which used in experiment is 0.45(d) × 2.0 m(H), and the result of and mass transfer apply to practical industry and environmental protection. The systems adopted for the absorption are Air/Water and NH3-Air/Water. We still cannot apply packed column to the domestic industry and environmental protection and depend on foreign technology, but this study will contribute to the industry and environment.

석탄을 원료로한 활성탄 제조와 흡착특성에 관한 연구

최동훈,김형호,김종수,김재홍,김장호 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.2

The purpose of this study is develop manufacture technology of activated carbon for purification of water, it is investigated suitable manufactures for manufacture of activated carbon for purification of water by use anthracite coal and bituminous coal produced in internal and external through this fact, economic valuation and made method established. it is valuated wether or not suitable high degree purification by know removal characteristic organic matter such as KMnO₄Consumption, DOC, UV-254, and THMFP make use of Pilot-plant (purification of water treatment) for made activated carbon. For mixed anthracite coal and bituminous coal by means of coal tar pitch, completely melt to fixed coal tar pitch apply l50℃ heat at stainless steel box, since then compounding weight rate 1:l of anthracite coal and bituminous coal sieved material, then add coal tar pitch and caking water, mixed suitable compounding rate since then extrude and mix by diameter 5.5m extruder, extruded mold cute and dry length l0mm pellet shape by cutter and then made activated carbon.

기능성 Zeolite-KCIO₃ 복합체에 의한 Chlorothalonil의 분해

최충렬,박만,이동훈,이병묵,이인구,최정,김장억 한국환경농학회 2004 한국환경농학회지 Vol.23 No.2

Salt occlusion in zeolite is a unique phenomenon that takes place only when the salt size is similar to the window size of host zeolite. KClO₃-occluded zeolite, as an environment-friendly oxidant, has a high potential for effective removal of various organic pollutants. This study was carried to investigate the characteristics and the removal kinetics of fungicide chlorothalonil by zeolite-KClO₃ complex. About 10% of KClO₃ was occluded in zeolite pores synthesized by salt-thermal method from fly ash, although the occlusion amount was relatively less compared to that of nitrate salts. By occlusion with KClO₃, no remarkable changes were found in X-ray diffraction patterns of cancrinite, whereas some decrease of overall peak intensities was found with those of sodalite. Different releasing kinetics of ClO^(-)₃ ion were observed in distilled water and soil solution from zeolite-KClO₃ complex. Two reactions, hydration and diffusion, seem to be related with the release of KClO₃. Therefore, the release isotherm of ClO^(-)₃ ion well fitted to the power function model which indicate the release was made by hydration and diffusion. The removal of chlorothalonil by zeolite and KClO₃ reached at reaction equilibrium within 6 hours by 18% and 47%, respectively. However, the chlorothalonil removal by the zeolite-KClO₃ complex increased slowly and steadily up to 92% in 96 hours. These findings suggested that zeolite-KClO₃ complex could be applied for effective removal of organic contaminants in the soil and aqueous environment.

선형유도전자펌프내의 자기유체 유동에 관한 수치적 연구

최훈기,유근종,박태봉,은재정,장남영 국립7개대학공동논문집간행위원회 2003 공업기술연구 Vol.3 No.-

Numerical analysis is performed for magnetic and MHD flow fields in Electro-Magnetic(EM) pump. A finite volume method is applied to solve magnetic field governing equations and the Navier-Stokes equations. Vector and scalar potential methods are adopted to obtain the electric and magnetic fields and the resulting Lorentz force in solving Maxwell equations. The magnetic field and velocity distributions are found to be influenced by the magnitude of the Reynolds number and the phase of applied electric current. Computational results indicate that the magnetic flux distribution with changing phase of electric current is characterized by a pair of counter-rotating closed loops. The velocity distribution of the flow field is influenced on the intensity of Lorentz force.

紡絲工程에서의 Emulsion Fume 處理를 위한 充塡塔 適用에 관한 硏究

최동훈,박진식,장성호,김일배,서정민,김장호 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.2

This study was carried out to interpret hydraulic behavior and component analysis of the emulsion fume, laboratory work of mass transfer in the packing tower which packed 50mm plastic Hiflow-ring. The results from experiment are as follows : 1. The component of emulsion fume is Cyclododecane, 1-Tridecene, 4-Nonene 5-butyl. The kinds of Alkene contained approxymately 76.23 percent. 2. To compare with conventional packing, 50mm Hiflow-ring could save energy because of low pressure drop under high load. 3. The unique magnituteds of packing witch was used are as follows. Cv = 5.18 × 10^(-4) , m = 0.683, n=0.462 so we can predict efficiency which occurres. 4. To require plant of the packing tower in the gas capacity factor 2.7 (Kg^(1/2) m^(-1/2) s^(1))

관수된 충전칼럼에서의 압력손실

최동훈,신남철,김장호 동아대학교 환경문제연구소 1998 硏究報告 Vol.21 No.1

In this work, an equation for determining the pressure drop of irrigated packings is introduced. This is built up from the well-known channel model. It is valid for the whole load range up to the flooding point. To apply the pressure drop formula, it is necessary to know the operating conditions, the liquid hold-up and the from factor μ specific to the packing element or group of packings. The method of calculating the pressure drop is illustrated by means of an example 1) The agreement obtained between the calculations and the experiments is regarded as good. As expected, the measurements below the loading line are reproduced more exactly-the average error ￣δ₁(△P/H) in Table l(a)-(c) is considerably less than 10%. The measurements above the loading limit including the pressure drop at the flooding point are reproduced with an average relative error ￣δ₂(△P/H) of about 15%. 2) Another advantage of the method chosen here the represent the pressure drop is that, by means of a packings element constant μ characteristic of almost every family of packing elements or group of packing elements of similar construction, it is easy to compare the pressure drop of the particular type of packing element and its height with other packing elements. The advantage of this model is that know-ledge of the dry pressure drop of the packing is not necessary. To reinforce the above dependences a numerical example is added with the help of which the determination of the pressure drop is demonstrated.

유·초등학생 장애이해 교육

이유훈,권택환,김희규,유장순,최세민 국립특수교육원 2003 연구보고서 Vol.- No.1

특수교육이 장애학생을 포함한 모든 학생의 특성과 요구에 부응하는 통합교육으로 발전하기 위해서는 무엇보다도 장애인에 대한 편견과 차별이 없어야 한다. 장애인에 대한 편견과 부정적인 태도는 결국 장애인의 사회통합에 부정적인 영향을 미치기 때문에 우선적으로 해결해야 할 과제라고 할 수 있다. 본 연구에서는 「유ㆍ초등학생 장애이해 교육」자료를 개발ㆍ보급하여 장애인에 대한 편견과 차별을 해소하는데 그 목적을 두고, 전문가 협의회, 관련 문헌 탐색, 기존 장애이해 교육 자료 분석, 현장교사 설문 및 심층면담 등을 실시하였고, 이를 통해 얻은 연구 결과를 요약 정리하면 다음과 같다 첫째, 우리의 학교현장에서는 장애이해 교육 시간확보가 어려운 실정이다. 이런 현상은 교육경력이 낮은 교사일수록 또는 학교경영자와 일반교사의 이해가 부족할수록 더욱 심각하게 나타나는데, 이러한 문제를 해결하기 위해서는 국립특수교육원이나 시ㆍ도교육청에서 장애 이해 교육에 따른 시간확보 방안을 제공할 필요가 있다. 장애이해 교육의 필요성에 대한 학교경영자 및 일반교사의 인식 부족을 해결하기 위해서는 학교경영자와 일반교사가 특수교육과 장애인에 대한 이해를 넓힐 수 있도록 하는 다양한 연수프로그램이 마련되어야 한다. 둘째, 장애이해 교육에 활용할 수 있는 자료의 양이 부족할 뿐 아니라, 기존에 개발된 자료를 활용할 수 있는 체계적인 방안이 마련되어 있지 많다는 점이다. 따라서 장애이해 교육에 활용할 수 있는 다양한 자료가 개발되어야 하고, 기존에 개발된 자료는 쉽게 활용될 수 있도록 종류별로 정리되어야 하고, 활용할 수 있는 구체적인 방법도 제시할 필요가 있다. 셋째, 장애이해 교육이 학기초나 '장애인의 날'과 같은 특정기간에 편중되어 있다는 점이다. 장애인식 개선을 위한 교육은 년 중 계획을 세워 일정기간 단위로 실시하여야 한다. 넷째, 장애이해 교육에 활용되는 모델이나 이해교육 방법이 주로 감각장애(시각장애ㆍ청각장애) 또는 지체부자유학생을 중심으로 되어 있다는 점이다. 교육현장에서는 발달장애학생도 많기 때문에 발달장애학생을 모델로 하는 장애이해 교육 프로그램이나 교수-학습방법도 지속적으로 개발되어야 한다. 다섯째, 장애이해 교육방법이 다양하지 못하다는 점이다. 장애이해 교육이 효율적으로 이루어지기 위해서는 장애인의 다양한 특성이 고려되어야 한다. 그러기 위해서는 교수활동 방법 또한 이들의 특성을 고려하여 보다 다양하게 이루어져야 할 것이다. 위에서 제시한 장애이해 교육 실태를 토대로 본 연구보고서에서는 현장교사들이 쉽게 활용할 수 있도록 하기 위해서 1부, 2부로 나누어「유ㆍ초등학생 장애이해 교육자료」를 안내하였다. 제 1부 「장애이해 교육의 개관」에서는 장애이해 교육자료 개발의 필요성, 목적, 연구방법 및 절차, 장애이해 관련 제이론, 장애이해 교육의 현황 및 문제점, 개선방안 등을 기술하여 학교현장의 교사들이 장애이해 교육에 대해 보다 폭 법은 이해를 도모하도록 하였다. 제 2부 「장애이해 프로그램 및 교육자료」에서는 장애유형별 즉, 시각장애, 청각장애, 정신지체, 정서장애, 자폐성장애, 학습장애, 지체부자유 등으로 나누어 제시하여 교사들이 장애 이해 지도를 보다 쉽게 접근할 수 있도록 하였고, 아울러 기존에 개발된 장애이해 교육자료를 도서, 방송프로그램, 영화, 인터넷 웹사이트 등으로 분류 제시하여 학교현장에서 학생의 수준과 활동 내용에 따라서 다양하게 활용할 수 있도록 하였다. 본 프로그램은 「유ㆍ초등학생 장애이해 교육자료」의 한 예에 불과하다. 학교 현장의 지도 교사는 프로그램의 수준을 상향 또는 하향 조정하여 지도할 수 있으며, 생활 주변의 다양한 소재로 프로그램의 내용을 수정 또는 대체할 수 있다. 나아가 창의적으로 새로운 상황을 전개할 수 있도록 하는 노력도 필요하겠다. 2004년에는 「중ㆍ고등학생 장애이해 교육자료」가 개발되어 학교현장에 보급될 계획이다. In order for special education to develop into an inclusive education system that meets the characteristics and needs of all children, including those who are disabled, there must be no prejudices and discriminations against children who are physically or mentally challenged. As the biases and negative attitudes toward persons with disabilities could eventually exert negative influences on their integration into society, these tasks must be effectively taken care of above all else. This study, with the aim of dissolving prejudice and discrimination against the persons with disabilities by developing and disseminating materials for the "Education for Non-disabled Preschoolers and Elementary School Children to Understand Disabilities", has had consultations with experts, researched related books and other documents, analyzed the existing educational materials for understanding individuals with disabilities and conducted surveys on and interviews with teachers in the field of education. The results of the study are summarized as follows. First, the fact remains that it is difficult to secure time to educate on how to understand the children with disabilities at the nation's schools. Such a phenomenon occurs more seriously among teachers with less educational experiences as well as school managers and general education teachers without adequate understanding of the children with disabilities. To resolve this problem, either the Korea Institute for Special Education or the municipal and provincial educational agencies need to provide ideas to secure time to educate the understanding of those who are challenged. In order to solve the lack of understanding of the children with disabilities among school managers and general education teachers, various programs must be created and implemented to train the school administrators and regular teachers to expand their understanding of the persons with disabilities. Second, not only is the amount of materials available for the education of the children with disabilities insufficient, but moreover there are no systematic measures to make the most of those materials that are already developed. Therefore, diverse resources must be developed to use for educating the understanding disabilities, and already developed materials must be classified into categories for easy use along with concrete methods for utilizing such resources. Third, education for understanding the children with disabilities is concentrated on specific periods, such as the early semester or the "Day for the Persons with Disabilities". Education to improve the perception of disabilities should be conducted in periods under an annual program. Fourth, the models or methods used to educate for understanding the persons with disabilities are centered mainly on the individuals with sensory injured (with visual or hearing impairments) or the persons with physically disabled. At educational sites, there are many children with developmentally disabled and so educational programs and teaching-learning methods to educate the understanding of the children with disabilities should be modeled after the children with developmentally challenged. Fifth, the methods to educate the understanding of the persons with disabilities are not diverse. For the efficient education of the understanding disabilities, the diverse characteristics of the persons with disabilities should be taken into account. To be successful in this matter, more diverse methods of teaching activities also need to be used by considering the characteristics of the people with disabilities. On the basis of the reality of developing an understanding and proper awareness of those who are disabled as presented above, this study report guides the "Education for non-disabled preschoolers and elementary school children to understand disabilities" in Part 1 and Part 2 for easy use by teachers on active duty. In Part 1, titled as "A General Survey of Educating the Understanding of the Children with Disabilities", I have described the necessity and purpose of educating the understanding of the children with disabilities, its study methods and procedures, various theories on educating the understanding of the children with disabilities, the current situations and problems of educating the understanding of the children with disabilities and their improvement measures to deepen the understanding about educating the understanding disabilities by teachers on active duty. In Part 2, titled the "Programs to Educate the Understanding Disabilities and Educational Materials," I have classified types of disabilities into visual impairment, hearing impairment, mental retardation, emotional disorder, autism, learning disability and the physical impairment for easy approach to educate the understanding disabilities by teachers. At the same time, I re-categorized the already developed materials to educate the understanding disabilities into books, broadcasting programs, movies, Internet web-sites and others for diverse use at schools according to the children' levels and activities. This program is just one example of the "Education for Non-disabled Preschoolers and Elementary School Children to Understand Disabilities". I have arranged it in such a way as to allow teachers to teach the children by upgrading or downgrading the program's level as well as modifying or replacing the contents of this program by using various materials that can be obtained in everyday lives. In 2004, I am planning to develop and distribute the "Education for non-disabled Middle-and High-school Students to Understand Disabilities".

MPEG을 이용한 저전송률 화상회의 시스템

장경훈,이정훈,최연성,김장형 濟州大學校 産業技術硏究所 1998 산업기술연구소논문집 Vol.9 No.2

In this paper. we implement ITU-T Recommendation H.323 that is multimedia communication system. Video conferencing system is implemented software using RTP. MPEG and G.721 by Visual C++ 6.0 language in Windows-98. Also Video post-office box is implemented. We should prove the result of H.323 through experiment.

초등학교 특수학급 교육과정 편성·운영 현황과 문제점 및 개선방안에 관한 연구

이유훈,최세민,유장순,권택환 국립특수교육원 2006 특수교육연구 Vol.13 No.1