전단력 하에서 유도된 광민감군이 첨가된 HDPE 필름의 광분해

조무환,이훈복,신부영 嶺南大學校 環境問題硏究所 1995 環境硏究 Vol.15 No.1

융용 혼합기를 이용하여 공기 분위기 하에서 강한 전단력을 혼합물에 가하여 광분해성 M/B(Master Batch)를 제조하였다. 제조된 M/B가 45 중량 % 첨가된 광분해성 HEPE 얇은 필름과 분해성 M/B가 첨가되지 않은 일반 HDPE 필름을 인플레이션 법으로 제조하였다. 두 필름의 광분해성을 시험하기 위하여 필름을 자외선 조사기와 옥외에 노출시켜 기계적 물성 및 필름의 표면 변화를 살펴보았다. 자외선 조사 시험에서 분해성 필름은 120시간 이내에 처음 신도의 95%를 잃고 매우 취약한 상태로 되었으나, 비분해성 필름은 150시간 조사에도 처음 신도의 80%를 유지하고 있었다. 옥외 노출 시험에서는 분해성 필름의 경우 옥외 노출 21일 후 처음 신도의 약 98%를 상실하였으나, 비분해 필름은 같은 노출 시간에 원래 신도의 98%를 유지하고 있었다. SEM을 이용하여 필름 표면을 관찰한 결과, 특이한 표면 변화를 보여주었다. Photodegradable master batch was prepared by using mechanical oxidation during melt mixing process with high shear and in the presence of air. High density polyethylene (HDPE) thin film containing 45 wt % photodegradable M/B (Master Batch) and common high density polyethylene (HDPE) thin film were prepared by inflation film processing. The films were exposed under both mercury-vapor lamp light and sunlight. The photodegradable film lost about 95 % of its original elongation for 120 hours irradiation and was very brittle. The common film without photodegadability retained 80 % of its original elongation for 150 hours irradiation. Under sunlight, photodegradable HDPE film lost about 98 % of its original elongation at break after 21 days exposure and was very brittle. The common film still retained 88 % of its original elongation at the same period. Surface morphology of the films was examined by using scanning electron microscopy (SEM). SEM micrographs revealed the interesting change of the surface morphology of photodegradable thin film during outdoor exposure.

가상교육을 위한 컨텐츠 개발 및 운영전략

전무부,김대영,김종욱,이창희 啓明專門大學 産業開發硏究所 2002 啓明硏究論叢 Vol.20 No.1

인터넷의 발전과 더불어 탄생한 가상교육은 교육의 기회 확대 및 평생교육의 실현을 목표로 하여 계속 발전될 것으로 예상된다. 가상교육의 성공여부는 차별화된 멀티미디어 컨텐츠의 개발, 교육의 비용과 학습효과, 교육의 기회 측면등을 고려한 효율적인 가상교육의 운영에 좌우되며, 가상교육에 활용되는 네트워크와 하드웨어 인프라 및 소프트웨어의 지원이 필수적이다. 또한 면대면 수업에서의 시험평가가 아니라. 물리적으로 떨어져있는 학습자를 대상으로 과제평가와 시험평가를 실시하는 경우에 대한, 제출된 과제나 피시험자의 진위 여부에 대한 신뢰성 문제를 해결하기 위해 토론. 공개세미나. 그룹 프로젝트 등의 학습 활동을 활발히 실시하여 질적인 수업평가를 수행하는 것이 필요하다. 본교에서도 향후 가상교육 컨텐츠의 개발에 있어서 이러한 측면들을 고려하여, 보다 전문화되고 효과적인 컨텐츠의 개발이 요구되며. 이를 위한 전문적인 가상교육 컨텐츠의 개발지원이 필수적이다. 또한 교과목의 특성과 학급집단의 특성 및 학습자의 수준 등을 고려하여 코스에서의 웹기반 수업의 비중, 과제의 유형. 상호작용의 유형과 빈도 등을 고려한 컨텐츠 개발을 위한 개발 프로세스에 대한 연구와 학습효과와 비용측면을 고려한 가상교육 운영전략에 대한 연구가 필요하다. Cyber education which has started with the development of internet is expected to keep growing toward the enlargement of learning opportunity and realization of continuing education. Therefore. a new education ideal and model for cyber education must be developed. The success or failure of cyber education depends on various factors. First, the development of educational process suitable to cyber education and specific multimedia contents suitable to enhance the quality of education must be developed. Second, efficient management of cyber education designed to reduce education cost and to enhance learning effect and education opportunity. Cyber education based on internet is affected by speed of communication, stability of communicating network, feasibility of course access, cheapness of communicating cost. And how efficiently and properly the softwares related with teaching are used to enhance the teaching effect is also important. Therefore, support of network, hardware infrastructure, and software used for cyber education is necessary. Besides, in the evaluation of learning achievement, not the face-to-face evaluation, but the evaluation of students far away, to meet with credibility of report and written tests, other ways of evaluation such as debate. open seminar, group project will be used. In this college, the development of more specialized and efficient contents is required, and. therefore, financial support for the development of specialized cyber education contents is necessary.

韓國에 서식하는 휘파람새(Cettia diphone) Song의 특성

尹茂夫 慶熙大學校 1995 論文集 Vol.24 No.-

The stereotyped songs of seventy seven Bush warbler(Cettia diphone) males were recorded at twenty one localities from Gosung at Gangwon Do to Jeju island during breeding seasons from 1984 to 1994. 637songs of 62 males of Bush Warbler were analysed through syllable sharing and quantative multiple analysis, in order to investigate identification of geographic song variation of Bush Warbler songs. A special variables used for quantative multiple analysis, the eight variables of songs consisted of number of note in whistle portion(NNWP), dominance frequency in whistle portion(DFWP), duration of whistle portion(DWP) within whistle portion composed as anterior parts of songs, duration of complex syllable portion(DCSP), maximum frequency of complex syllable portion(MACSP), minimum frequency of complex syllable portion(MICSP) within complex syllable portion composed as posterior parts of songs, interval between whistle portion and complex syllable portion(IWC), and duration of song(SD) related total parts of songs. Bush Warbler songs consisted of whistle portion that induced song and complex syllable portion that enclosed song. Males of Bush Warbler have from one to four song types(M=1.94, N=63) per individual. The number of song type tended to increase as the latitude of recording locality declined. There was no difference in song duration of Bush Warbler songs between recording localities (M+SD=1.13±0.15sec, N=637). Number of note in whistle portion of Bush Warbler songs had from one to fifteen (M+SD=4.42±2.29, N=637) differences according to recording localities. Dominance frequency of whistle portion was higher in southern costal localities than in inland localities. Total number of syllables in Bush Warbler songs analysed with sonagram was thirty five and mean number of syllable per individual was 3.3(N=62indv.)syllables. Distribution of syllables was localized but it was impossible to identify the song dialects of Bush Warbler songs by using syllable sharing. From the results of quantative multiple analyses with the eight song characteristic variables. I could identify geographic song variation of Bush Warbler in Korea. Specially, there was definite discrimination between inland localities and southern costal localities. Geographic song variation groups in inland localities divided into two subgroups; one included Cheonwon and Geochang locality, the other included Gapyeong, Naju, Ganghwa and Buan locality. Geographic song variation groups in southern costal localities divided into three subgroups; one was Yeosu locality, another Jeju, the other Goeje locality.

심폐소생술중 심실기능 및 판막운동의 평가

이부수,김영식,이강현,황성오,임경수,박금수,윤정한,안무업,최경훈 대한응급의학회 1994 대한응급의학회지 Vol.5 No.2

Background : Mechanism of blood flow during cardiopulmonary resuscitation(CPR) in humans remains controversial and poorly understood, although cardiac or thoracic pump theory was proposed. We investigated cardiac movement, ventricular function and atrioventricular valve motion with aid of transesophageal echocardiography during precordial compression during CPR in humans. Methods and results : During CPR transesophageal echocardiography was performed in 14 patients with non-traumatic cardiac arrest. Manual precordial compression during CPR was performed according to American Heart Association guidelines. Mitral valve closed in 9 and did not close in 5 patients during "compression systole". Tricuspid valve closed during compression systole. Compression vector directed to right ventricle, basal portion of interventricular septum and left atrium. The heart rotated clockwise and the apex was more displaced than the base("swing motion"). Fractional shortening(FS) and ejection fraction(EF) of right ventricle exceeded those of left ventricle(FS : 55±9% vs 18±8%, p<0.05), EF : 79±9% vs 37±16%, p<0.05). FS and EF of left ventricle was higher in patients with systolic mitral valve closure than patients with persistent systolic opening of mitral valve(FS : 21±7 vs 13±7%, EF : 45±12 vs 22±12%, p<0.05), but FS and EF of right ventricle was not different. Conclusion : During precordial compression, the heart rotated clockwise and displaced. Systolic function of right ventricle exceeded left ventricle. Marked compression of right ventricle and systolic closure of tricuspid valve suggested that right ventricle functioned as a pump generating blood flow during precordial compression. Closure of mitral valve was dependant on systolic function of the left ventricle.

慶熙 Campus(高凰山)의 鳥類調査

尹茂夫 慶熙大學校 1982 論文集 Vol.11 No.-

1. Line censuses were made along the Kyung Hee Campus of Seoul Korea peninsula from January 1, 1979 to November 25, 1980. 2. The number per hour and percentage dominance (for the total of all species) were calculated to show indices for relative density an abundance of each species. 3. One census routes, the number of species recorded, and crude density by the number of birds per kilometer, hour and hectare listed bellow: 1) Summer June 11, 1979...41.17/km, 1.40/h, 12.06/ha(8 species, 70 Individuals) June 1, 1980...44.70/km, 2.53/h, 13.10/ha(9 Species, 76 Individuals) 2) Winter Jan 6, 1979...55.88/km, 81.89/h, 16.37/ha(15 Species, 95 Individuals) Jan 13, 1980...40.58/km, 13.80/h, 11.89/ha(14 Species, 69 Individuals) 4. Of 1,694 individuals of 59 species of birds recorded in the Kyung Hee University Campus are. Magpie, Pica pica, Tree Sparrow, Passer montanus, Great Tit. Parus major, Grey starling, Strunus cineraceus were recorded to be dominant species which were characteristic species of their habitats(Fig 3,4). 5. Whereas most of the other area in the central region Seoul of Korea have suffered from devastation, the area Kyung Hee University campus is unspoiled and covered with broad leaved tree. This area is a heavily mixed forest in which breed the Ring-necked Phesant, Phasianus colchicus, Tricolor Flycatcher, Ficedula zanthopygia, Great Tit, Parus major, Crow Tit, Paradoxornis webbiana and important passerine birds. Accordingly, this are should be protected through effective means of management.

우리나라 민항기 추락사고 실태와 항공보험의 제 문제

전무부 국제무역학회 2002 국제무역연구 Vol.8 No.1

우리나라가 고도산업사회로 진입하면서 항공수요는 해마다 폭발적으로 증가하여 2001년 한해동안 국내외선에 탑승한 여객 숫자는 2천 5백 35만명을 넘었으며, 수출입화물의 운송수요도 크게 증가하고 있다. 이와 더불어 1990년대에 이르러 항공수요의 폭발적인 증가와 함께 크고 작은 민항기 사고가 빈번하게 발생하여 인명손실은 물론 물적손해 또한 막대하였다. 한편 대형 항공사고에 대비하여 운송인의 책임을 규정한 주요 조약 내지 협정으로는 1929년의 바르샤바조약을 비롯하여 1955년의 헤이그의정서, 1966년 몬트리올협정, 1995년의 국제항공운송 협회 승객배상책임을 위한 항공사간 협정, 1999년 5월 28일 국제민간항공기구에 의해 제정된 몬트리올 협약이 제정된바 있다. 이와 함께 여객의 사망, 부상, 신체장해, 기체손상 및 화물의 멸실·손상 등 항공사고 발생시 부담해야 할 항공사의 책임한도도 무제한으로 확대됨에 따라, 보험사의 보상도 實損補償制度로 이행되어 항공보험의 중요도는 더욱 강조되고 있다. 이에 본 연구에서는 항공운송인 및 보험자의 책임을 분석하고 항공보험제도가 안고 있는 운용상 제 문제점을 파악하여 그 개선방안을 제시하였다. As Korean economy has developed into highly industrialized stage, aviation demand has also increased rapidly, and the number of aviation passengers has passed 25,350,000 and transportation demand has been increasing. Especially since the 1990s, the number of aircraft accidents increased exposively and material loss as well as human life loss has been enormous. Important treaties and contracts specifying transporters' responsibility regarding big scale aircraft accidents are such as Warsaw Convention in 1929, Hague Protocol in 1955, Montreal Agreement in 1966, IATA Intercarrier Agreement Passenger Liability in 1995, and Montreal Agreement made by International Civil Aviation Organization in May 28, 1999. With this land of development, the limit of responsibility imposed on airline companies, when air accidents take place, regarding death, injury, handicapped condition of passengers, aircraft hull damage, and loss and damage of cargo has enlarged enormously, compensation of insurance companies has changed into non-average insurance, and aviation insurance has become more important. This study has tried to analyze responsibility of air transporters and insurers, point out some problems administering aircraft insurance system, and suggest some ideas solving these problems.

Dispatcher(전화 상담원)의 보조에 의한 심폐소생술

안무업,김영식,이부수,황성오,임경수 大韓應急醫學會 1992 대한응급의학회지 Vol.3 No.1

Background: Dispatcher-assisted telephone instruction in cardiopulmonary resuscitation(CPR) has been proposed to increase rates of bystander CPR in cases of out-of-hospital cardiac arrest. In Korea, bystanders do not know how they resuscitate the victims and EMS(Emergency Medical System) is incomplete. Study Objectives: This study was undertaken to tested the efficacy of dispatcher assisted telephone CPR using a recording mannikin(Anne Resusci) in a highstress, simulated cardiac arrest scenario. Study Subjects: We assesed in a group of volunteers, without prior CPR lectured and training(GroupⅠ, n=20), without prior CPR training but received lecture previously(Group Ⅱ, n=20) who received telephone instruction were compared with that of previously recevied lecture and tranined(Group Ⅲ, n=20) who received same massage. Performances of above groups were also compared with a group(Group Ⅳ, n=20) composed of previously received lecture and trained volunteers who did not receive the massage. Results: Members of groups Ⅰ,Ⅱ, and Ⅲ delivered similar average ventilation volumes, approximately 1L/cycle. In contrast, group Ⅳ delivered somewhat less, about 700ml/cycle(p<0.05). Group Ⅰ performed ventilation better than group Ⅳ but there was no significant intergroup differences in the performing effective chest compressions. The global performance of group Ⅲ, the group with prior CPR lecture, trained and telephone instruction, was superior to that achieved by other groups(p<0.05). We conclude that dispatcher-assisted telephone CPR can offer a safe and cost-effective means to increase the rate of bystander CPR and also improves the quality of CPR performed by persons with prior CPR training.

巨濟島 沿岸의 冬季鳥類調査

元炳旿,尹茂夫 慶熙大學校 1974 論文集 Vol.8 No.-

1. Four winter sea bird censuses were made along the off-shore coast of Geoje island, on the southeastern coast of the Korean peninsula, during 1971∼1974. 2. Relative abundance and dominance were culculated to make indices for relative density and abundance of each species. 3. Three census routes and the number of species were recorded, and crude density by number of birds per kilometer and hour were as fallows: 1) Gohyun-Sungpo-Sobyongtaedo-Changseungpo 1971 census……21.73/㎞, 188.90/h(1,587 individuals of 20 species) 1974 ceusus……42.01/㎞, 466.10/h(3,067 individuals of 22 species) 2) Gohyun-Sungpo-Sobyongtaedo 14.28/㎞, 123.12/h(543 individuals of 18 speices) 3) Gohyun-Changseungpo-Sobyongtaedo 12.96/㎞, 131.04/h(1,141 individuals of 16 species) 4. Of 6,120 birds of 48 species recorded, Black-throated Diver, Gavia arcticus, Black-tailed Gull, Larus crassirostris, Ancient Murrelet, Synthliboramphus antiquus, Black-necked Grebe. Podiceps caspicus, Velvet Scoter, Melanitta fusca. Red-breasted Merganser, Mergus serrator and Spot-billed Duck, Anas poecilorhyncha were recorded to be dominant species. 5. The unspoiled off-shore coast of Geoje island should be preserved for the wintering of sea birds.

분해성 고분자를 이용한 지속성 비료에 관한 연구

장상희,신부영,조무환,이일희 嶺南大學校 環境問題硏究所 1997 環境硏究 Vol.16 No.2

요약문농작물에 사용된 비료중 30~705가 농작물의 영양분으로 이용되고, 나머지는 지표수 에 의하여 하천으로 유입되거나, 지하수로 스며든다. 이러한 이유로 경제적 손실과 더불어 지하수에 질소 성분이 농축되어 식수 오염에 큰 영향을 미친다. 본 연구에서는 고분자 가공 기술을 응용하여 120。C에서 무정형 폴리 프로필렌과 요소비료를 혼합하여 지속성 비료 제 조를 제조하였다. 제조된 지속성 비료는 25。C 수중에서 비료성분의 방출속도를 측정하였 다. AbstractIt is estimated that only 30∼70% of the fertilizer applied in agriculture is used for plant nutrition, the rest is carried away by ground water or lost through mtrification-denitrification. Apart from the economic loss due to wastage, severe environmental problems arise due to increasing nitrate concentration in public drinking water. The fertilizer urea was mixed with APP (atactic polypropylene) by super mixer at 120 'C. The rate of fertilizer release was determined by checking dissolution rate in water at 25。C.

韓國鳥類의 調査報告(1970)

元炳旿,尹茂夫 慶熙大學校 1972 論文集 Vol.7 No.-

This report is the first in the annual series of Bird Reports. Ⅰ. Bird banding and recoveries A total of 5,410 birds of 46 species were banded primarily in the area of Kyunggido, Korea during 1969∼1970. 14 recoveries of 4 species have been reported in Korea (out-side of banding sites) and 9 recoveries of 2 species from abroad. During this period 4 recoveries of 3 species banded abroad were reported from Korea. Band returns of the House swallow banded in the previous years obtained within Kyunggi-do, showed that the percentage of the first year returns was 4.80% of 543 adults and 0.70% of 287 nestlings, and of second year returns was 1.00% of 1694 adults and 0.19% of 8,600 nestlings. Ⅱ. Chick food analysis of some Korean birds Observations were made on the feeding habits of nestlings of five species as follows: Permanent residents, Dendrocopos major japonicus, Parus palustris hellmayri, and summer residents, Halcyon coromanda major, Zoothera dauma aurea, Phylloscopus occipitalis coronatus. Collars were placed on nestlings, and we collected the food samples. The results of analysis were as follows: 1. Dendrocopos major: Adult insect 92.40% were the most preferred foods. Among adult insects, Aphididae made up 74.32%. The food included miscellaneous adult insects 18.08%, insect larvae 6.40%, pupae 0.45%, other animal foods 0.75%, but a small quantity of cherry seeds was also fed to the nestling. 2. Halcyon coromanda: Frogs occupied 51.85% of food items and freshwater fishes 14.81%, crawfish 12.96%, earthworms 10.18%, were preferred. Adult insects were 9.26% of all food items. 3. Zoothera dauma: Earthworm, Drowada sp. 96.80% was the most preferred food. They consumed also insect larvae, Lepidoptera 0.65% and Pheretina sp. 2.55%. 4. Parus palustris: They consumed only insects composed of ; insect larvae 95.4% pupae 3%, adult insects 1.50%. Of the insect larvae, Notodontidae made up 46.60%. 5. Phylloscopus occipitalis: Insect larvae 59.40%, adult insects 7.20%, pupae 0.60%, spiders 1.30%, and miscellaneous animal foods 31%. Noctuidae made up 35.90% of insect larvae. Among miscellaneous animal food, Semisulcospira sp. occupied 11.10%.