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고재홍,안미영,홍기원,차재호,구정숙 서울大學校 社會科學大學 心理科學硏究所 1993 心理科學 Vol.2 No.-
지방과 도시인의 도로교통 이용실태 및 태도 조사 결과를 보고하였다. 지방을 대표하는 지역으로 경상남도 거창읍을, 그리고 도시는 서울특별시 강남구 대치동을 선정하였고, 각 지역에서 800명(400 부부쌍)의 무선표본을 대상으로 질문지로 조사하였다. 조사내용을 출퇴근 길의 교통수단이용, 외출시의 교통수단이용, 자가용의 이용및 소유실태, 운전면허 소지 및 취득실태, 교통사고경험, 대중교통수단에 대한 평가 및 관련 태도 등이었다. 조사결과, 도시와 지방간의 현재의 교통수단 이용에서의 차이를 파악할 수 있었을 뿐 아니라, 후속연구에서 교통수단이용의 변화를 평가할 수 있는 기저선이 마련되었다. Two representative samples of married couples. one(n=400 couples) from Dae-Chi Dong in Seoul and another(n=400 couples) from the town of Ku-Ch'ang in South Kyung-sang Province were studied through a questionnaire. The questionnaire dealt with (1)transportation uses in commuting to work (2)transportation uses on weekends. (3)types of automobiles owned and the uses to which they are put. (4)statistics related to obtaining and possessing driver licenses. (5)experience of traffic accidents, and (6)attitudes regarding the public trasportations and policies. The study as designed to provide a baseline for future studies on the transportation statistics as well as gauging the urban-rural difference in automobile culture.
데스크탑 마이크로 성형시스템의 가진성형에 따른 동특성 연구
홍동표,고유곤,홍용,김현식,이재완 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-
In this study, a desktop forming system which enables hydro dynamic bearing forming was developed. It consists of power train system, frequency forming system, manufactured Die-set, and controller of desktop forming system. The desktop micro forming system is focused on a higher load capacity and a shorter forming time than conventional system. Therefore it was designed for power train capability and load condition of Ball Screw. Moreover, a Piezo actuator was installed to make accurate machining possible, however, the Piezo actuator generate noise and vibration. Thus we performed the analysis of dynamic characteristics through the experiment about developed system in order to reduce such problems and discuss the alternative methods.
CACB를 적용한 다중 반송파 CDMA전송방식에 관한 연구
고재훈,홍인기 경희-다반 ASIC 설계교육센터 2005 경희-다반 ASIC센터 논문집 Vol.6 No.-
차세대 무선통신에서 수백 Mbps의 다양한 전송률을 갖는 멀티미디어 서비스를 지원하기 위하여 다중 부호 전송 방식을 적용한 다중 반송파 시스템(Multi-Code Multi-Carrier CDMA : MC- MC- CDMA)이 제안되었다. 본 논문에서는 MC-MC-CDMA가 갖는 단점 중 하나인 높은 PAPR(Peak to Average Power Ratio)문제를 해결하기 위하여 다중 부호 방식 대신 CACB(Constant Amplitude Coding for Bi-orthogonal)를 적용하였다. 또한 CACB가 가지는 파형부호화(waveform coding)효과로 인한 성능향상과 다중 경로 페이딩환경에서 MC-COMA와의 성능비교를 통하여 CACB MC-CDMA가 가지는 주파수 다이버시티 이득을 BER로 분석하였으며 그 수율 (throughput)을 비교, 분석하였다.
Estradiol에 의한 흰쥐-자궁의 수축 기능과 Polyamine 대사의 변동에 관한 연구
이명아,고재홍,이영재,신경호,전보권,천연숙 고려대학교 의과대학 1995 고려대 의대 잡지 Vol.32 No.3
The polyamines have been postulated to be essential in most processes associated with both hypertrophy and hyperplasia. The effects of estrogen on uterine contractility vary with animal species, and most reports have shown that in vitro contractility of rat uterus is decreased after estrogen treatment, but estrogen increases polyamine contents in castrated rat uterus. This study was carried out to investigate whether the regulation of polyamine metabolism may be instrumental in the contractile response of castrated nonpregnant uterus of female SD rats to electrical field stimulation (40 V, 100 μsec : EFS). Estradiol (E2) increased uterine contents of putrescine (PT), spermidine (SPD), and spermine (SPM). These E2 effects were inhibited by tamoxifen or DFMO, but E2-incuced increase of uterine SPM content was enhanced by aminoguanidine. E2 decreased the amplitude of force developed in the rhythmic spontaneous contraction of rat uterus, but it exaggerated the increase of uterine contraction force in response to EFS. The E2-dependent exaggeration was inhibited by tamoxifen, DFMO, or indomethacin, but was significantly enhanced by aminoguanidine. The synergism between E2 and aminoguanidine on uterine contractility was little affected by indomethacin. These results suggest that E2-dependent increase of uterine contractility may be ascribed partly to increase of uterus polyamines.
강신몽,이원태,고영창,최상규,김윤희,이홍석,서재관,윤중진,이혜경,최득린,김종열,윤창육,변명식,이장홍 大韓法醫學會 1991 대한법의학회지 Vol.15 No.2
Individual identification is an important part in medicolegal field especially in mass disaster. At July, 27, 1989, KAL KE-803 was crashed on landing at Tripoli International Airport, Liba. The plane was caught in fire and sixty eight Koreans were sacrified. The majority of victims were severely charred and injured. The authors examed all dead bodies and successfully identified all the cases through visual, anthropological, odontological, radiological and pathological methods including fingerprint and blood typing.