日本 自然科學分野 學術硏究 動向 調査硏究

金漢洙,洪翰植,金完鎬,金源,李永吉,徐英淑 경북대학교 1981 새마을 硏究論叢 Vol.1 No.-

교류전해에칭용 에틸렌글리콜의 알루미늄박판의 부식억제 효과

박성민, 양정진, 김홍일, 김한주, 김성한, 신진식, 박수길 충북대학교 건설기술연구소 2008 충북대학교 건설기술연구소 논문집 Vol.27 No.1

In this study, additions of aluminium foil eching characteristics were compared with sulfuric acid for capacitor. sulfuric acid and ethylene glycol is used as addition, characteristics of funtional group from addition were guessed by comparing of aluminium foil eching characteristics. When sulfuric acid was added in HCI etching solution, corrosion of aluminum metal was inhibited by the chemical adsorption of sulfate ion, when ethylen glycol was added in HCI etching solution, corrosion inhibited by the chemical adsorption of OH­^ion.

인터리브가 삽입된 CFRP 적층판의 층간파괴 인성평가

김지훈,강태식,한길영,김재열,심재기 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.4

In this paper, an investigation was performed on the dynamic interlaminar fracture toughness of CFRP(carbon fiber reinforcement plastics). Specimens used in this experiment are CF/PEEK laminated plates. In this experiments, Split Hopkin-son's Bar(SHPE) test was apply to dynamic and notched flexure test. The mode II fracture toughness of each unidirectional CFRP was estimated by the analyzed deflection of the specimen and J-integral with the measured impulsive load and reac-tions at the supported points. As an experimental result the vibration amplitude of [0˚_10/F_4/0˚_10] laminates appear more than that of [0˚_10/F_2/0˚_10] laminates for the J-integral and displacement velocity at a measuring point. Also, it is thought that the dynamic fracture toughness of two kind specimen(CF/PEEK) with the in crease of displacement velocity becomes great at a measuring point with in the range of measurement.

자기구성 퍼지 제어기법에 의한 수직다관절(AMI)로봇의 위치 및 속도 제어

김종수,배길호,한성현 경남대학교 공업기술연구소 2000 硏究論文集 Vol.18 No.-

본 연구에서는 산업용 로봇 시스템의 정밀도 및 견실성을 향상시키기 위하여 자기구성 퍼지제어 알고리즘을 개발하여 디지털 신호 처리기에 기초한 관절제어기를 설계하고 이의 실시간 제어실현에 대한 연구가 수행되었다. 제안된 자기구성 퍼지 제어기는 적절한 제어입력을 출력하면서 환경을 관측하고 이 제어입력으로 인한 결과를 이용하여 다음에 나올 결과를 향상시킨다. 그러므로 자기구성 퍼지 제어기를 이용하면 환경에 대한 최소의 정보만을 가지고도 견실 제어기를 설계할 수 있다. 본 논문에서는 조정인자와 규칙을 동시에 수정하여 제어규칙이 점근적으로 수렴하면서 수렴속도를 향상시킬 수 있는 자기구성 퍼지 제어기를 제안하였다. 제안된 자기구성 퍼지 제어기는 위에서 언급한 바와 같이 퍼지 제어기의 단점을 보완하는 측면이 있기 때문에 성능향상을 기대할 수 있다. 따라서, 본 논문에서는 퍼지추론기능과 퍼지규칙 조정능력을 갖는 퍼지 알고리즘을 개발하고 외부환경의 변화 즉, 제어대상인 플랜트의 파라미터변화 및 부하의 변동에 대해서도 능동적이고 우수한 제어성능이 유지될 수 있는 고정도 산업용 로봇 제어기 설계기법을 제안하고, 수직다관절(AM1)로봇에 대한 시뮬레이션 및 실험을 통해 그 성능을 검증하였다. In this paper, it is presented a new technique to the design and real-time implementation of fuzzy control system based-on digital signal processors in order to improve the precision and robustness for system of industrial robot. Fuzzy control has emerged as one of the most active and fruitful areas for research in the applications of fuzzy set theory, especially in the real of industrial processes. In this thesis, a self-organizing fuzzy controller for the industrial robot manipulator with a actuator located at the base is studied. A fuzzy logic composed of linguistic conditional statements is employed by defining the relations of input-output variable of the controller, In the synthesis of a FLC, one of the most difficult problems is the determination of linguistic control rules from the human operators. To overcome this difficult, SOFC is proposed for a hierarchical control structure consisting of basic level and high level that modify control rules.

폐흡충에 의한 무균성 노흉에 대한 돼지꼬리형 도관(pig-tail catheter)을 이용한 치료의 효과

한경택,권세훈,김형호,하재화,선길홍,권용은,윤성호,이승일 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Background: Pulmonary paragonimiasis is caused by consumption of raw or improperlycooked crustacea infected with the laval stage (metacercaria) of Paragonimus westermani. The most characteristic symptoms were rust-colored sputum and cough. Paragonimiasis causes pleural thickening or effusion in 48% of the patients. Pleuro-pulmonary paragonimiasis can be easily overlooked by physicians who do not suspect this disease in the differential diagnosis. Method: We compared the outcomes of 11 patients with paragonimus empyema managed either through thoracotomy or pig-tail catheter drain. These patients were confirmed by food history, clinical and radiological findings, and laboratory data. Results: The male and female ratio was 1.75 : 1, and mean age was 40.0 ± 13.5 years. AII patients had pulmonary symptoms such as cough or chest pain. Serum-ELISA for paragonimiasis were all positive (mean titer was 0.57). AII patients had pleural effusion in radiological findings( 2 patients had bilateral pleural effusion). All patients received praziquantel (75 ㎎/㎏/day for 3days). Two patients were treated with thoracotomy and nine patients were treated with pig-tail drain. Hospital stay were 14.5 days in thoracotomy group and 5.6 days in pig-tail group respectively, Conclusion: Compared to the conventional thoracotomy grouP, the patients with paragonimus empyema who received pig-tail catheters had a significantly-decreased period of drain in situ, were clinically improved earlier, and were discharged earlier.

Ellipticine과 그 이성질체들에 대한 분자궤도함수론적 연구

한성욱,이길준,김복조 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(B)

Molecular orbital studies were carried out for the ellipticine and its isomers, known as having antitumor activity and cytotocity, by semiemperical PM3. Electrostatic potential studies have shown that the most reactive site of proton attacks was the nitrogen atom in carbazol ring. The net charge of the nitrogen was linearly correlated with the basicity of the isomers. We have predict the antitumor activity of the isomer by the basis of the dipole moment [suggested by Barone et.al. J. Mole. Stru.(Theochem) (1992), 253, 319]. And we have suggested that frontier orbital theory is valuable to explain for the formation of covalent adducts. These results may suggest clues that the method how to interpretate the mechanism of action for ellipticine and how to design new drugs.

화상처리에 의한 춉트 스트랜드 섬유배향의 분포측정

김혁,윤성운,한길영,심재기,이동기 조선대학교 생산기술연구소 1995 生産技術硏究 Vol.17 No.2

In order to examine the accuracy of intensity method, the fiber orientation distribution of chopped strand reinforced polymeric composites is measured using image processing. Theoretical and experimental results of fiber orientation function are compared with each other for the composites having different fiber content and fiber orientations. An intensity method is used for the experimental investigation and the measured fiber orientation function is compared to the calculated one. The results show that, firstly, the feature of fiber orientation can be represented and identified by the fiber orientation function J measured and theoretical fiber orientation functions, J_(M) and J, respectively and related as J_(M)=0.73J. Secondly, as far as the measuring of fiber orientation is concerned, the intensity method is, in general, found to be quite effective due to its feature of using the intensity difference in the measuring ranges. Finally, the accuracy of the method increases when the fiber with less clash is considered.

경북 지역의 지하수 수질에 관한 연구 2 : 깊이에 따른 지하수의 상태에 관한 연구 Study on he State of Ground Water by the Depth

한성욱,김복조,이길준 경운대학교 산업기술연구소 2000 産業技術硏究論文誌 Vol.3 No.1(B)

We investigated the contamination of ground water in Kyungbuk region about 87 points by the depth. The obtained results were as follows; 1. It was showed that nitrate nitrogen is highest and Cl^- is lowest for life used. 2. It was showed that nitrate nitrogen concentration is high in adjacent region of nightsoil treatment plant, COD is high in specific waste landfill and electric conductivity is high in golf field. 3. It showed that the relationship between depth and pH and nitrate nitrogen is good. pH is increased and nitrate nitrogen is decreased according to the depth.

국악감상수업을 위한 멀티미디어 학습자료개발 : 초등학교 3, 4학년을 중심으로

김동현,채길룡,오한숙 光州敎育大學校 初等敎育硏究所 2002 初等敎育硏究 Vol.17 No.-

Emphasis of Korean classical music has been greatly placed on the music course since the 6th curriculum, and it is more laid in the 7th curriculum; the content is more detailed and Korean classical music of materials in music textbook amounts to 38% - increased 10% compared to the 6th curriculum. Now is rather to devise data to enable 'esthetical experience' of Korean classical music by providing certain 'experience activity' program and develop data to be effectively used in the field than to discuss weight of Korean classical music education. Therefore, this study attempts to develop appreciation data with computer and multimedia to be used as teaching and learning data in the appreciation area, which specially teachers suffer from how to guide, among several areas of Korean classical music. For such objective, the music course of the third and fourth grader was analyzed to draw a teaching and learning objective and a viewpoint of appreciation, materials of Korean classical music were examined in textbook, and various multimedia data and related website to improve teaching effect were surveyed, arranged and made into PowerPoint data. In addition, students' interest in learning and results of the performance evaluation were compared by application of the produced multimedia data to the actual field class to verify effect of data use. As a result of comparison of results of students' interest in Korean classical music appreciation class before and after application of the produced data, use of the data influenced improvement of students' interest in Korean classical music class. Also, as a result of making the field teachers who are interested in Korean classical music class examine the data, they responded that the data is very useful for improvement of the field Korean classical music class. Results of this study are summarized as follows; A. In Korean classical music class, data enabling broad experience and musical practice through application of the varied multimedia dta out of monotonous listening-centered class was developed. B. Out of the limited educational environment by improvement of teaching and learning method with ICT, self-directional learning was enabled in consideration of learner's level and interest.

알루미늄 샌드위치 판넬의 전자파 차폐효과

한길영,김진석,안동규 朝鮮大學校 機械技術硏究所 2006 機械技術硏究 Vol.9 No.1

The objective of this research is to investigate the electromagnetic interference(EMl) shielding characteristics of aluminium sandwich panel. We fabricated aluminium sandwich panel with core material Ni-Cu fabrics. The measurements of shielding effectiveness(SE) were carried out frequency range 300MHz -1 GHz for commercial purposes such as electric or telecommunication devices. The return loss and loss due to absorption were also measured as a function of frequency in the microwave(300MHz-1GHz) region. It is observed that the SE of the composites is the frequency dependent, increases with the increases in filler loading. The Ni-Cu fabrics core material showed higher SE compared to that of AI. The aluminium sandwich panel was shown to exhibit up to 40dB of SE.The results indicate that the composite having higher filler loading can be used for the purpose of EMI shielding as well as for some microwave applications.