지식기반경제의 현황과 정책과제 : 정보통신산업을 중심으로

지광수,윤돈형 朝鮮大學校 經營經濟硏究所 2005 經營經濟硏究 = Management and economics research Vol.28 No.2

명주고둥, Chlorostoma xanthostigma의 생식주기

이치훈,이영돈 제주대학교 해양연구소 1998 해양자원연구소연구보고 Vol.22 No.-

Reproductive cycle of the top shell, Chlorostoma xanthostigma was investigated histologically to know it's gonadal development using gonadosomatic index (GSI). Samples were collected at the coastal area of Hamdok in Cheju-Do from October. 1995 to August, 1996. The top shell. C. xanthostigma. appeared to be dioecious. neither sex reversal nor hermaphroditic. The sex ratio was approximately 1 : 1. The gonad was located on the surface of the intestinal gland in the posterior spiral meat part of the shell. In male and female, GSI began to increase from April when water temperature increased and reached it's maximum value in July. It began to decrease August thereafter, maintained relatively low value until March. The annual reproductive cycle of this species could be classified into five successive developmental stage: multiplication stage (January to March), growing stage (February to June). mature and spent stage (April to July), degenerative stage (August to January) and recovery stage (October to February). The spawning of the top shell occurred from April to July and the main spawning period appeared in July.

Divergences in the Theory of Cyclotron Resonance Lineshape

최상돈,고정대,최치규,홍성락,류재연 제주대학교 1990 논문집 Vol.31 No.-

불순물이나 포논과 상호작용하는 전자계에 대한 전기전도도템서와 사이클로트론 공명 선모양 함수를 도출하였다. 전기전도도텐서를 얻는 과정에서 Kubo공식을 이용하는데 타이론에서 무시한 보정항인 충돌항을 고려하고 이 항을 열적이완시간과 관련시켜 일반적인 형태를 얻었다. 섭동향을 계산하는데 Argyres와 Sigel의 사영연산자방법과 본 논문에서 정의한 사영연산자를 토대로 한 운동방정식방법을 다루었는데 이들은 서로 동일한 결과로 나타남을 알 수 있었다. 또한 최저차수에서 구한 선모양 함수를 타이론의 결과와 비교했고 고차항에서는 타이론에서 발산하는 것과는 달리 열적이완시간이 포함됨으로써 발산항이 존재하지 않음을 알 수 있다. A new theory of cyclotron resonance lineshape for the system of electrons in interaction with impurities of phonons is introduced. The collision term appearing in the Kubo formalism is dealt with in the relaxation tine approximation. The many body conductivity tensor is reduced to two different forms in the single particle formalism. But the two conductivity formulas give the same lineshape function, implying that the two techniques are identical. The thermal relaxation time included in the lineshape function is finite , resulting in the disappearance of any danger of divergence in some higher order terms usually excluded in the formula.

꼬리줄나비고기, Chaetodon wiebeli의 초기발생

이치훈,김병호,노섬,이영돈 제주대학교 해양과환경연구소 2004 해양과환경연구소 연구논문집 Vol.28 No.2

The development of eggs and larvae of the butterflyfish. Chaetodon wiebili were observed. Fertilized eggs were spherical. colorless. and driven into gelatinous masses. They measured 0.75±0.18 in diameter and not contain an oil globule. Hatching taken place 61.0 hours after two celled stage at water temperature 25.6-27.7℃. Newly hatched larvae measured 0.91 nm in total length and had an ovoid yolk of 0.65 nm in longest diameter. In 72 hours after hatching. the larvae grew 1.72 nm in total length. The mouth and anus were open and the melanophore pigments appeared above the eyes. The pectoral fins are formed and the larvae began to swim actively.

울타리 고둥, Monodonta labio의 생식주기

송영보,이치훈,나오수,이영돈 濟州大學校 海洋硏究所 2002 해양과환경연구소 연구논문집 Vol.26 No.-

1995년 9월부터 1996년 8월까지 제주대학교 해양과 환경연구소가 위치한 함덕연안 조간대에서 채집한 울타리고둥, M. labio의 생식주기를 조사하기 위하여 생식소숙도지수의 변화와 생식세포 형성과정을 조직학적방법으로 조사하였다. 1. 울타리고둥의 생식소는 패각내 나선상 육질부 하단에서 꼬리돌기까지 간장부의 표면에 위치 하였다. 생식소가 성숙하면 암컷은 짙은 녹색, 수컷은 유백색을 띠고, 방출 후에는 암컷은 연갈색, 수컷은 연황색을 나타내었다. 2. 생식소숙도지수(GSI)는 암컷과 수컷 모두 수온이 상승하는 4월부터 상승하기 시작하여 9월에 암컷 0.47, 수컷 0.42로 최고치를 보이고 이후 10월부터 급격히 감소하였다. 저수온기인 1월에 GSI는 암컷과 수컷 모두 0.07로 최저치를 보였다. 3. 생식소의 발달 단계는 분열증식기(3월∼4월), 성장기(4월∼7월), 성숙기(8월∼9월) 그리고 방출 및 회복기(10월∼1월)의 연속적인 주기로 구분 할 수 있고, 주산란 시기는 10월로 추정 된다. 4. 울타리고둥, M. labio은 자웅이체로서, 성비는 약 1:1이었다(P>0.05). Reproductive cycle of thick liped monodont. Mondonta labio was invetigated by the histological observation of gonads and the gonadosomatic index(GSI). The thick liped monodont were collected at the intertidal zone of Hamdeok in Jeju-do from September, 1995 to August, 1996. Gonad of them was located o the surface of the liver below the stomachal caecum posterior spiral meat part of the shell. GSI value began to increase from May(as water temperature increased) and reached it's maximum value in September both male and female which were 0.42 and 0.47, respectively. It began to decrease from October thereafter, maintaining relatively in low value from January to March. The reproductive cycle of this species could be classified into four successive developmental stage; multiplication stage(March to April), growing stage(April to July), mature stage(August to september), spent and recovery stage(October to January). The main spawning period of M. labio appeared in October. The top shell, M. labio appeared to be gonochorism, neither sex reversal nor hermaphroditism. The sex ratio was approximately 1.0 : 1.0(P>0.05).

나선형 이중 평행판 축전기형 Blumlein 전송회로를 사용한 소형 질소레이저의 동작 특성 연구

양준묵,이치원,조돈수,이봉연 충남대학교 기초과학연구소 1995 忠南科學硏究誌 Vol.22 No.1

The design and performance of a compact nitrogen laser which consists of a Spiral multiple parallel plate capacitor type Blumlein transmission line circuit are described. The laser tube is made by 50 ㎜ long with a 2.5 ㎜ main electrode gap spacing. The output power increased with the spark gap distance. The peak power of 3.0 μJ has been obtained with a spark gap distance of 3.5 ㎜ and a repetition rate of 30㎐. The optimum nitrogen gas pressure was about 60torr independent of the variation of spark gap distance. The laser operates with repetition rate of up to 70 ㎐.

원발성 조기 위 소세포암

송근영,강길,박정희,김경종,민영돈,박치영,임성철 朝鮮大學校 附設 醫學硏究所 2002 The Medical Journal of Chosun University Vol.27 No.2

Gastric small cell carcinoma(SCC) is defined as poorly-differentiated neuroendocrine tumor of the stomach, and their morphologic and biologic features arc similar to those of the lung. It is known that this tumor has poor prognosis even in early pathologic stage, It acounts for only 3% of all gastrointestinal SCC. that has been reported only 33 cases outside and 6 cases inside of the comitiy. Most of these reports are related to advanced gastric SCC. as pathologic stage IIIb or IV. This report describes a case of early gastric SCC. pathologic stage Ib.

Structure and Function of the Reproductive System of Aplysia kurodai

Chi-Hoon Lee,Bong-Kiun Kaang,Young-Don Lee 한국발생생물학회 2015 발생과 생식 Vol.19 No.4

This study investigated structure and function of the reproductive system in Aplysia kurodai by means of anatomical, histological, and histochemical observation. Reproductive system of this species is consisted of ovotestis, small hermaphroditic duct, ampulla, accessory genital mass and large hermaphroditic duct. The ovotestis is composed of a large number of follicles, and both oocytes and spermatocytes matured in the same follicle. The small hermaphroditic duct is a single tube and contains a swelling, the ampulla, which functions as a storage organ for endogenous sperm and an oviduct. The accessory genital mass is connected to both the small and large hermaphroditic duct, and consisted of three glands: albumen, membrane (winding) and mucus gland. The albumen gland is consisted of granular cells producing basophilic and neutral mucopolysaccharides. The membrane and mucus gland are consisted of granular cells producing acidophilc and sulfated mucopolysaccharides. The large hermaphroditic duct is a single tubular gonoduct linking the accessory genital mass to the common genital aperture but is consisted of two parallel compartments. Internally, these two compartments are incompletely divided by internal septum or fold, which are called as the red hemiduct and white hemiduct, respectively. The red hemiduct functions as an oviduct and the white hemiduct functions as a copulatory duct. The reproductive system of A. kurodai is externally comprised a single tube, i.e., monaulic type. However, internal structure of duct is incompletely divided into oviduct and copulatory duct, i.e., the oodiaulic type.

MHEG - 5 객체를 위한 프리젠테이션 관리자 설계

안치돈(Chi-don Aho),이세훈(Sei-hoon Lee),왕창종(Chang-jong Wang) 한국정보과학회 1996 한국정보과학회 학술발표논문집 Vol.23 No.2B

MHEG 표준은 다양한 멀티미디어/하이퍼미디어 정보 표현과 자료 교환의 표준을 정의하고 있으며, 이를 이용한 다양한 응용들이 개발되고 있다. 그러나 이러한 MHEG 표준을 기반으로 하는 응용의 개발은 엔진을 포함하는 클라이언트 쪽의 부담이 가중될 수 있으며, 시공간 동기화 모듈을 포함하는 엔진의 개발은 더욱 어려운 작업이 되고 있다. 본 연구에서는 Amsterdam Hypermedia Model 에서 도입된 채널이라는 개념을 사용하여 MHEG-5 멀티미디어 객체의 시공간 동기화를 지원하는 프리젠테이션 관리자를 설계한다. 설계한 프리젠테이션 관리자는 MHEG-5 엔진의 인터프리터로써 구현되므로 기존 MHEG 엔진의 객체 검색 모듈과 디코더(decoder) 모듈만을 요구하기 때문에 분산 멀티미디어/하이퍼미디어 환경에서 클라이언트의 부하를 감소시킬 수 있으며, 채널이 갖는 장점으로 인하여 장치 독립적인 프리젠테이션이 가능하고 다양한 멀티미디어 객체들이 갖는 복잡한 시공간 동기화를 쉽게 구현할 수 있다.

하상여과를 이용한 하천수질 개선 연구 - 모델전개 및 모델매개변수 결정

성치돈(Chi Don Sung),안규홍(Kyu Hong Ahn),이용훈(Yong Hun Lee),공인철(In Cheol Kong),김승현(Seung Hyun Kim) 大韓環境工學會 2003 대한환경공학회지 Vol.25 No.4