UHF 대역의 휴대전화 착신기능 제한 시스템의 설계 및 제작

남효덕,김종석,김병철 嶺南大學校 工業技術硏究所 2001 工業技術硏究所論文集 Vol.29 No.2

As demands grow for restricting use of cellular phones by attendants in the public places such as conference rooms, churches, and playhouses etc., a call blocking system against UHF band cellular signals is developed for other attendants who do not want to be disturbed by the phone rings. The idea of preventing a cellular phone from ringing was developed from the fact that the system radiates interferent signals having 0.1 to 0.05 watts of CW wave, makes it possible to increase the error rates of output signal of PSK modem, and hence makes the cellular phone Impossible to receive the right call signal. The system designed in this study was set up and tested in the several public places and found itself very effective.

중격측좌핵 및 선조체기저핵의 아미노산 함량에 대한 한쪽 뇌 해마 제거의 영향

남준철,김종규 순천향의학연구소 1996 Journal of Soonchunhyang Medical Science Vol.2 No.2

We analyzed the amino acid contents of fundus striatal and accumbens septal tissue in unilateral hippocampectomized rats by high performance liquid chromatography(HPLC). Thirty-one male rats were divided into hippocampal, cortical control and normal control groups. After a survival period of 7 days, the animals were sacrificed by decapitation. Two to three milligrams of tissue were removed from the nucleus fundus striati and the nucleus accumbens septi in ipsilateral or contralateral side of the brain. In the nucleus accumbens septi, the contents of glutamate were reduced significantly in the ipsilateral hippocampal group and increased significantly in the contralateral hippocampal group than in the normal control group and the cortical control group, while there were no significant differences between the 2 control groups. The contents of glycine were reduced significantly in the contralateral hippocampal group than in the normal control group and the cortical control group. But in the nucleus fundus striati, the difference of contents of all amino acids were nonsignificant. From the above results it is suggested that the ipsilateral hippocampus may exert a direct effect on the accumbens septi than the contralateral hippocampus.

연질폴리우레탄폼의 물리적 성질 및 흡음율에 관한 연구

정종원,박남국,박선정,박종래,김영철 全南大學校 觸媒硏究所 1997 觸媒硏究 論文集 Vol.19 No.-

The effects of polyols, isocyanates. surfactants and water on the physical properties of the polyurethane foam were investigated. The resin used in this study was prepared from a variety of polyol mixtures by adding catalyst, surfactant and cross-linker. The polyurethane was foamed from the resin by adding an equivalent amount of isocyanate and was used in property measurements. The physical properties were more affected by the type of isocyanates and the amount of water than the sound absorption coefficient. The sound absorption coefficient of the polyurethane foam was superior for the polyol mixture of KE-810(40%)FA-733(40%)/FA-703(20%). The sound absorption coefficient was increased with the amount of surfactant L-5309 up to 3000Hz, but was decreased above that frequency.

노즐직경이 디젤분무의 분산과정에 미치는 영향

고경남,문창은,허종철 濟州大學校工科大學産業技術硏究所 1996 尖端技術硏究所論文集 Vol.7 No.2

This experimental study has been conducted to investigate the effect of nozzle diameter on spray characteristics under the parameters of injection pressure and ambient pressure. The double flash method was used to visualize diesel sprays, and the results obtained in this study are as follows; The diesel spray is divided into smooth liquid core, disturbed liquid core and the chaotic region which is generated the droplets and the ligaments by spray overtaking. The transition point with spray tip velocity variation under the injection pressure of experimental rage in ambient pressure 3MPa is generated in earlier duration time as high spray pressure. Also, spray tip velocity is gradually decreased as the increase of the spray tip velocity.

韓國産 夜行性 맵시벌科(벌目: 벌亞目)의 分類學的 硏究

이종욱,정종철,김기범,김정한,배지득,남상호 대전대학교 기초과학연구소 2002 自然科學 Vol.13 No.2

영남대 생물학과에 소장되어 있는 표본과 2001년 4월~2002년 6월 사이에 채집한 표본을 대상으로 하여 한국산 야행성 맵시벌의 분류학적 연구와 출현 현황 및 숙주 관계의 분석을 실시하였다. 분류학적 연구 결과 Gauld(1970)가 영국산 야행성 맵시벌을 대상으로 한 연구에서 기록한 Mesochorinae아과, Tryphonin-ae아과, Ctenoplematinae아과, Ophioninae아과의 4아과외에 Metopinae (Metopius속)를 추가하여 한국산 야행성 맵시벌류는 총 5아과 13속을 기록하였다. 또한 한국산 야행성 맵시벌의 출현 현황을 분석한 결과 야행성으로 잘 알려진 Mesochorinae아과의 Mesochorus속, Tryphoninae아과의 Netelia속과 Ophioninae아과가 전체 야행성 맵시벌 증 95%를 차지하였다. 속별 출현현황을 살펴보면 Netelia속이 393개체가 출현하여 가장 많은 수를 나타내었으며 Ophi-on속, Mesochorus속, Enicopilus속도 전체 출현 분류군 중 높은 비중을 차지하였다. 월별 현황을 살펴보면 전반적으로 4월에서 11월 사이에 걸쳐 나타나는데, Op-hioninae아과는 5월과 7월에, Tryphoninae아과는 6월에 집중적인 출현 빈도를 보였다. 숙주의 분류군에 따른 야행성 맵시벌의 기생 양상을 살펴보면 대부분이 나비목을 대상 숙주로 하고 있으며 Mesochorinae아과와 Ctenopelmatinae아과는 벌목에도 많은 종이 기생하는 것으로 나타났다. 특히 Mesochorinae아과의 Cidaphus속은 위생 해충으로 분류되는 기생파리과(Tachinidae)에도 기생하는 것으로 나타나 위생 해충을 구제할 수 있는 천적 분류군으로 연구될 수 있는 가능성을 보였다. 숙주의 식성에 따라 살펴보면 부식성의 먹이를 섭식하는 부식성(saprophagus) 숙주, 곤충의 유충을 섭식하는 식충성(entomophagus)인 숙주가 소수 출현하였고 기생생활(parasite)을 하는 숙주도 다수 출현하였으나 대부분의 야행성 맵시벌의 기생 대상 숙주는 주로 식물을 해하는 식식성 곤충(phytophagus)으로 나타났다. Nocturnal Ichneumonidae, which was called yellow-brown ichneumonoid, included several subfamilies adapted for nocturnal activity. Taxonomic study of nocturnal ichneumonoid has been investigated by Gauld(1975) but examination of Korean nocturnal ichneumonoid has not been provided until now. This present study: the taxonomic revision, Appearance state and Host-parasite relation analysis of nocturnal ichneumonoid, were examined using Korean peninsula specimens. As the result. approximately 13 genera referable to 5 subfamilies appeared regularly in light trap. Genus MetopiudSubfamily Illetopinae) were newly recorded in nocturnal ichneumonoid. Tryphoninae and Ophioninae, which were dominant in appearance taxa! occupied 96% of total numbers of individuals, and majority of them were taken from May to November. Nocturnal ichneumonoid are parasitoids of part of immature holometabolous insects(Coleoptera, Diptera, Hymenoptera, Lepidoptera). Lepidoptera is the most common hosts of nocturnal group except Mesochorinae and Ctenopelmatine. In large number of Mesochorinae are koinobiont hyperparasitoids of ectoparasitic or endoparasitic BraconiddHymenoptera), and, less frequently, of Tachinidae(Diptera1. Also, Ctenopelmatinae are koinobiont endoparasitoids of Symphyta and, rarely, Lepidoptera. Majority of nocturnal ichneumonoid hosts are phytophagous, feeding plant taxa, and many host of Mesochorinae taxa are parastoids, and a few host are saprophagus or entomophagus.

조선대학교 의과대학 의학과 학사편입제도의 전향적 검토

임성철,박상기,도남용,박상학,이승일,송창훈,박종 朝鮮大學校 附設 醫學硏究所 1998 The Medical Journal of Chosun University Vol.23 No.1

There are many advantages and disadvantages under the limited bachelor's admission system. To diminish the demerits and to increase the merits of this system, the authors posed questions to the faculties and students of the Department of Medicine. Chosun University College of Medicine and other colleges in Korea. The questionnaire was made according to trends and feelings in this system. We received a lot of information and suggestions as to how to improve the system, in the following paper we discuss and report the prospective aspects of the bachelor's admission system.

무도계열 전공자들의 진로 개선 방안연구

김상철,이남주,윤종대 龍仁大學校 體育科學硏究所 1998 體育科學硏究論叢 Vol.8 No.1

The purpose of this study was to suggest the ideal direction in job opportunities by identifying the relationships among the personal charateristics, type of sports and his/her expectations toward job. The subject of this study consists of 320 students who were enrolled as Martial Art major in Y university located Kyunggido area in Korea. The instrument used in this study was modified from the guestionnaires which was administered by Jung-Ha Kim(1995) and mainly concerned on the items of job expectations. The title of the survey was "Questionnaires of Job Expectation of the students with Martial Art Major." the reliability of this survey was examined by Cronbach's α(α = .89). The PC-SAS was used to analyze the achieved data for this study. In conclusion, the review and development of curriculum are suggested to enhance with martial art major. The results of this study were shown as follow: First, the curriculum which focused on the professional Knowledge beyond martial art area is needed. Second, the professional classes related to martial arts should be offered. Third, the curriculum for teachers' background such as teachers education and instructors education is recommended.

분위기 압력이 디젤분무특성에 미치는 영향

허종철,고경남 濟州大學校 産業技術硏究所 1996 산업기술연구소논문집 Vol.7 No.1

An experimental study has been carried out to investigate the influences of injection pressure and ambient pressure on diesel spray. Especially, diesel sprays were visualized by means of double flash. The visualized spray volumes at the ambient pressure of 3MPa increase more steeply with respect to the elapsed injection time than the atomospheric pressure. The spray tip penetration is increased according to higher injection pressure and lower ambient pressure. When the ambient pressure is further increased, the transition of the spray tip penetration occurs earlier. And the spray tip velocity increases with higher injection pressure but decreases with higher ambient pressure. The spray cone angle does not vary with increasing injection time, but it depends significantly on the ambient pressure.

농촌지역사회의 보건교육 요구도에 관한 연구

김종우,남철현,김성우 韓國保健敎育.健康增進學會 2001 보건교육건강증진학회지 Vol.18 No.2

At the opening of a new millennium and a new century, health promotion and education services in Korea are in the early developmental stage. The National Health Promotion Act legislated in 1995 was a milestone for initiating a national and local health promotion program in Korea. And since then local governments and health centers have been developing and providing health promotion program for the community populations. The short history of health promotion and education in Korea has meant that local governments and health centers have a limited experience and organizational capacity for health promotion and education planing and practice. This study was attempted to measure health education need of rural community and to analyze the factors for health education need assessment. Surveyors interviewed 1250 subjects randomly selected. Subjects were 2.17% of men and women in Changnyung county and older then 20 years old. Data were collected from April 17, 2000 through April 27, 2000. The questionnaire consisted of general characteristics, health educational experiences, health educational method, health educational content and health educational needs for rural community residents. The questions on the health educational needs of content consist of 36 questions in 8 fields. The statistical methods used for the analysis were χ2 -test, t-test, F-ratio and ANOVA using SPSS program. In conclusion, despite more needs to the respondents who are in the low education level and socioeconomic state, in the old age, in the low health knowledge, they required less health education. To enjoy a more healthy life after more community residents actively understand and are interested in health education and health promotion, we certainly require a designed and systemic health education. The resources of health department in Korea are limited and the investment involved in health promotion and health edcation is severely reduced. Particularly this situation is more severe in the rural community. To select and perform an effective health education methods that the nature and reality of the rural community are considered, we'll use the resources to invest in health promotion affairs as effectively as possible and then they will take the responsibility of healthy community.

TiAIN 코팅공구를 사용한 Ti-6Al-4V 티타늄합급의 절삭특성에 관한 연구

이승철,박종남,조규재 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

The Titanium has many superior characteristics Which are specific strength, heat resistance, corrosion resistance, organism compatibility, non-magnetic and etc. and their quantity are abundant.this study performed turning operation of Ti-6AI-4V alloy using the TiAIN Coate Tool which treated PVD (Physical Vapor Deposition). Experimental works are also executed to measure cutting force, chip figuration and surface roughness for different cutting conditions. As a result of study. Tool wear was serious at over 100m/min of cutting speed and cutting condition was excellent at 1.0㎜ of cutting depth.