위상수학에 관한 연구 : 리이만다양체에서의 임계사상에 관하여 On the Critical Mappings of the Riemannian Manifolds

전길웅,강명경 충남대학교 자연과학연구소 1982 忠南科學硏究誌 Vol.9 No.1

There are many defined functional on the space of smooth maps of one Riemannian manifold to another. Maps that are critical for every defined functional are called critical. This paper shows that the fibers of critical maps are minimal submanifolds. Also, it provides a characterization of hypercritical maps and shows that the inverse of the hypercritical map is hypercritical.

높은 지향성을 갖는 Air Line 결합기 설계

길준범,이성원,최영호,박종임,안달,박준석 호서대학교 반도체제조장비국산화연구센터 2000 학술대회 자료집 Vol.2000 No.1

본 논문에서는, 일반적인 스트립 구조의 결합기가 갖는 문제 즉, 높은 온도에서 나쁜 특성을 보이는 문제점을 극복하고자 Air Line Type의 결합기를 구현하였다. 또한 이 결합기는 24dB이상의 지향성을 가지고 있다. 해석을 위해 짝수 모드와 홀수 모드 해석법을 사용하였고, EM-Simulation으로 확인한 특성과 실제 제작된 20dB, 30dB Cellular 대역(800∼900MHz) Air Line 결합기의 결고 특성은 좋은 일치를 보여주고 있다. 또한 최대 장점인 온도 특성은 온도 데이터를 통하여 온도에 강한 특성을 보임을 알 수 있다.

골반내에 발생한 Proximal-type 유상피성 육종 1예

길준철,이상수,전병화,김성훈,손우석,목정은,박양순,강길현 대한부인종양 콜포스코피학회 2003 Journal of Gynecologic Oncology Vol.14 No.4

유상피성 육종은 매우 드문 악성 연조직 육종으로, 전형적인 경우들은 주로 젊은 남성의 수부, 전완부와 같은 신체의 원위부에 피하 혹은 심재성 피부 종괴로 발생하며, 조직학적 소견상 적은 비정형성을 나타내는 유상피성 세포와 방추형 세포의 증식에 의한 다발성 결절 형태의 배열을 보인다. 최근에 전형적인 유상피성 육종과 조직학적 유사성을 가지나 더 공격적인 형태인 proximal-type 유상피성 육종이 보고되었으며, proximal-type은 전형적인 유상피성 육종에 비하여 현저한 유상피성 세포의 발현과 매우 심한 비정형성을 나타내며, 세포가 매우 크고, 소포성 핵과 뚜렷한 핵소체를 보이며, 자주 rhabdoid 세포의 양상을 띈다. 임상적으로는 전형적인 형태에 비하여 호발 연령이 조금 늦고, 주로 체간부에, 특히 골반, 회음부, 생식기 등과 같은 심부에 발생하고, 더욱 공격적인 양상을 나타낸다. 저자들은 13세 소녀에서 원발부위를 알 수 없는, 골반내에 발생한 proximal-type 유상피성 육종 1예를 경험하여, 문헌 고찰과 함께 보고하는 바이다. Epithelioid sarcoma is a rare malignant soft-tissue sarcoma with an unknown histiogenesis, typically presenting as a subcutaneous or deep dermal mass lesion in the distal portions of the extremities of young adults. Recently, a more aggressive, so-called 'proximal-type' epithelioid sarcoma has been reported. In contrast to conventional epithelioid sarcoma, the proximal type is characterized by a predominantly large cell epithelioid cytomorphology, marked cytologic atypia, and frequent occurrence of rhabdoid features in most patients. Proximal-type epithelioid sarcoma has a predilection for appearing in the genitalia, especially the vulva, penis, pelvis and buttocks. Also this lesion appears to be somewhat more aggressive or at least metastasizes earlier than the conventional epithelioid sarcoma. We report a 13-year-old girl who presented with a buge mass filling the pelvic cavity which was painful, hard and fixed on palpation, and was radiologically diagnosed as a malignant germ cell tumors on the CT scan. The mass was surgically excised and pathologically proved to be an proximal-type epithelioid sarcoma of unknown origin.

자연언어 이해를 위한 지식 표현과 추론에 관한 연구

김길준 聖潔大學校 情報産業技術硏究所 1997 情報産業技術論叢 Vol.2 No.-

Because there is a natural language in the all of our considerations, comprehension system of natural language must be to infer all types of natural language. If that is so; then was demanded as necessary to study knewledge to comprehension of natural language and method to expression knewledge. In this paper I reserched the these to infer all of the world.

대학캠퍼스계획의 기본방향에 관한연구 : 공간계획의 경향을 중심으로 With Reference to Recent Trend in Space Planning

兪吉濬 동아대학교 공과대학 부설 한국자원개발연구소 1981 硏究報告 Vol.5 No.2

This study is on basic patterns required for University campus planning. The conclusions are as follows : 1) University campus planning should be designed in accordance with such factor as characteristics and environmental, conditions of each university and once completed space will work as an important element which determince the character of the university. 2) Space program is a necessarily condition to create a good campus and therefore it is flexibility should be given full consideration and progressively reviewed. 3) It seems that the building site area required to provide better education and study environment is over 100M² per a student. The average of total construction area is found to be 16M². 4) The approximate ratios of education facility, education supporting facility, auxiliary education supporting facility and other supporting facility are found to be 55%, 19%, 20% and 7% respectively. 5) The building area of colleges of natural science party are around 12M² per a student and that of colleges of cultural science party, around 6M² per a student.

역전파 학습 알고리즘의 성능 향상에 관한 연구

전준길,이병호 漢陽大學校 工學技術硏究所 1997 工學技術論文集 Vol.6 No.1

In this paper, we propose a modified error signal to improve the EBP (Error Back-Propagation) algorithm. The output node of network generates a strong error signal in the case that the output node is far from the desired value, and generates a weak error signal in the opposite case. This accelerates the learning speed of EBP algorithm in the initial stage and prevents overspecialization for training patterns in the final stage. The effectiveness of our modification is verified through the simulation of handwritten digit recognition

어류의 패내 산란과 석패과 유생의 어체부착

권오길,박갑만,이준상,송호복 江原大學校 附設 環境硏究所 1991 環境硏究 Vol.8 No.-

This study was carried out to determine the attachment parts and rates on the host fish and the successive stages of the glochidial encystment. A scanning electron microscope observation of the glochidia, the larvae of freshwater brivalve, Anodonta arcaeformis flavotincta, on the host fish, Carassius auratus, was conducted. The attachment rates on the host fish were 30.1%, 22.3% on the pectoral, the caudal, and the pelvic and anal fin, respectively. Glochidia, once attached to the host, have become encysted within 27 hours. The glochidia in fish tissues have sloughed between 13 days and 15 days when the water temperature was 16℃ in laboratory. During encystment, the epithelial cells of the host fish migrated actively toward the attached glochidia and covered them. In the encystment process, the encysted tissues in the host have become loose in seven days and exposured a pat of the glochidium in eight days after infection. No changes of the glochidial size have found before attachment and after sloughing.

횡형 하강방식의 구문해석법에 관한 연구

김길준 聖潔大學校 自然科學硏究所 1996 自然科學硏究 Vol.1 No.-

美術 敎育의 實態와 敎科 專擔制에 關한 硏究

李吉鍾,金相俊 春川敎育大學 1991 論文集 Vol.31 No.-

Art-education should be done by specially-trained teachers through complete synthesization and balance of theory-study and practice-study, with character building by way of aesthetic experience. They tend to limit Art-education to acquirement of practical skill through activities of presentation, but that is caused by their wrong understanding and education activities far from original purpose of real Art-education. The purpose of this study was to examine, search for methods of desirable Art-education by analyzing 304 members of teacher's opinions about the actual condition of Art-education in elementary school and teacher's recognition for study, a form of study, a relative importance of teaching, the exclusive charge system of curriculum. 1. Art-education should be well-balanced between presentation study and appreciation study to realize aesthetic teaching. 2. Teachers should have enough knowledge of technic and formative art. 3. It is necessary that teaching aids, teaching materials, equipments-expansion and reference data should be put to practical and creative use. 4. The exclusive charge system of study should be early practiced for qualitative improvement of Art-education and realization of technical education.

황성군 일대의 육산 패류 분포에 관한 연구

최준길,조후묵,송병용 尙志大學校 1995 論文集 Vol.16 No.-

In order to explore the detailed distribution of land snails inhabitated in Heongseong, this study was conducted for 2 years (from March 20, 1992 to March 20, 1994) for four optional areas. Total appearances of species were 3 order, 1 Families, 17 Genera, 22 species and total individuals were 3,009. the dominant species were Chamalycaeus cyclophoroides and Diplommatina (Sinica) paxillus. The stati of land snails on size were that there were, in Minute species, Carychium pessinum with 1.5mm shell height and 0.8mm shell diameter, in macro species Acusta despecta sieboldiana, Koreanohadra Kurodana, Aegista (Plectotropis) diversa with 11-21mm sell height, 20-28mm shell diameter. The height and diameter variation of Aegista (Plectoropis) diversa were bigger than anyone else. Also, Numbers of spiral were four to 10, and body colors were mainly white or brown. In terms of inhabitation area, data were gathered more than 14 areas. Among them, species which were inhabitated in the fallen leaves were shown 31.8%, 9-15.9% in stone wall, garden and farming field. Especially Cionella lubrica being known endemic species of Ulung Island was confirmed in Hoengseong.