스퍼터된 바나듐 산화막의 구조적, 전기적 특성에 미치는 진공 어닐링의 효과

이승철,황인수,최복길 公州大學校 工學硏究院 生産技術硏究所 2003 論文集 Vol.11 No.-

Thin films of vanadium oxide(VO_(x)) have been deposited by RF magnetron sputtering from V₂O_(5) target in gas mixture of argon and oxygen. The oxygen/(oxygen+argon) partial pressure ratio of 0% and 8% is adopted. Crystal structure and optical properties of films sputter-deposited under different oxygen gas pressures and in situ annealed in vacuum at 400℃ for 1h and 4h are characterized through XRD, XPS, RBS, FTIR, and optical absorption measurements. The films as-deposited are amorphous, but 0%O₂ films annealed for time longer than 4h and 8%O₂ films annealed for time longer than 1h are polycrystalline. I-v characteristics were distinguished between linear and nonlinear region. In the low field region the conduction is due to Schottky emission, while at high fields it changes to Fowler-Nordheim tunneling type conduction. The conductivity measurements have shown an Arrhenius dependence of the conductivity on the temperature.

3상농형 유도전동기 회전자의 자기적 불평형에 관한 연구

이상일,정수복,구희상 조선대학교 에너지.자원신기술연구소 1999 에너지·자원신기술연구소 논문지 Vol.21 No.2

An analytical solution is formulated to predict the torque generated in a cage induction motor when then rotor becomes eccentric. The formulation uses an impedance matrix to calcualte the currents flowing in the stator windings and the rotor bars. With a knowledge of these currents, the generated torque can be obtained. The solution is then illustrated using a 4㎾ two-pole motor. The results were as follows; At low values of eccentricity (less than 40%) the dorp in peak torque is shown that the motor could become locked in an asynchronous torque dip when highly eccentric. At high values of eccentricity the model become inaccurate though it illustrated the general trend of decreasing torque with increasing eccentricity. Also, it is shown that the motor could become locked in an asynchronous torque dip when highly eccentric.

휴리스틱 제어 알고리즘을 이용한 공정제어 시스템 개발

李斗馥,李秀旭 홍익대학교 산업기술연구소 1997 産業技術 Vol.7 No.-

This paper deals with the development of heuristic manufacturing control to require in productive manufacture line. Development of communication technique and computer science have fast become system automation from shop floors to business offices. This automation have become supply of computer. These situations of system are based on current information technologies such as distributed applications client/sever architectures object-oriented programming message passing systems external databases and graphical user interfaces Futhermore, these system are built around a configureation environment in which users can layout their manufacturing workflow. In this workflow, all manufacturing activities can be flexibly planned at run time Thus, these systems have envolved to support the planning and optimization needs of user. These system are no longer simply tracking systems. The ends of this paper is applicated heuristic algorithm of AI planning of system. It is possibled high productivity, compatable anagement and saving of manufacturing cost by heuristic manufacturing control. There is executed simulation program for the automation system and plan and this program obtains the result of suitably ideal decision.

수영지능 향상을 위한 육상 트레이닝법에 대한 고찰

이유복 / 김수균 공주교육대학교 초등연구원 1979 公州敎大論叢 Vol.15 No.-

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Corticosteroid의 局所 塗布가 멜라닌 및 멜라닌 細胞에 미치는 影響에 關한 實驗的 硏究

李順福,金秀男 고려대학교 의과대학 1980 고려대 의대 잡지 Vol.17 No.1

Conflicting results have been reported as to whether or not the melanogenesis is influenced by topical application of corticosteroids on the skin of human and animals. In animals study, mealnogenesis was observed macroscopically when using natural corticosteroids. In human studies, the reports were based on the observation of complications in use of topical corticosteroids on inflammatory skin conditions and disorders of pigmentation such as melasma and vitiligo. The author observed hyperpigmentation of the normal skin around the lesions of vitiligo during the use of topical synthetic corticosteroids. The present studies were undertaken to evaluate the effects of topical Fluoinoclone on melanogenesis with and without the use of ultraviolet light as observed on the skin of colored rabbits' external ears. The changes of the skin color were observed macroscopically and microscopically after the daily topical application of Fluocinolone with or without daily irradiation of ultraviolet light (wave length : 2537-3660Å, lamp to target distance: 30㎝, exposure time : 5minutes). To observe the microscopic findings, the skin specimens which were taken at 7 day intervals for 28 days were stained with DOPA, silver nitrate and hematoxylin-eosin respectively. The results were as follows: 1. There were no macroscopic or microscopic changes of melanin or melanocytes in the control group which had been applied with cream base daily for 28 days. 2. In the ultraviolet irradiated group mild increments of melanin were observed on the 7th day of the experiment. These increased moderately or prominently on the 14th day and on the 21th day. The degree of increments decreased thereafter. Enlargement of meannocytes was paralleled with the increase in increments of the melanin. Proliferation of melanocyes was observed from mild to moderate degree until the 21th day of the exmperiment, but these decreased after that time. 3. Mild increments of melanin were observed on the 7th day of the experiment in the 0.01% Fluocinolone applied group and on the 14th day in the 0.025% Fluocinolone applied group. These increased moderately in the first group and prominently in the second group one week later. The following week, the degree of increments decreased mildly, but did not change thereafter. The enlargement of melanocytes was similar to the increase in increments of melanin. Mild proliferation of melanocytes was noted on the 14th day. This increased moderately one week later, but was not changed after that. There were no differences in the increments of melanin or in the size and number of melanocytes in response to the various concentrations of the applied creams. 4. The increments of melanin were observed mildly on the 7th day of the experiment and moderately on the 14th day in the 0.01% and 0.025% Fluocinolone applied groups with the additional irradiation of ultraviolet light. There was no change after the 14th day. The change in size of melanocytes was similar to the increase in increments of melanin. Mild proliferation of melanocytes was noted on the 14th day of the experiment. This increased moderately on the 21st day with no further change. There were no differences in the increments of melanin or the size and number of melanocytes observed in the use of concentrations of the applied creams. Above findings suggest that topical Fluocinolone has enhancing effect on the synthesis of melanin and prolong the effect of irradiation of ultraviolet light.

대게 Chionoecetes opilio (O. Fabricius)의 난발생 및 부화 유생의 형태

이복규,임영수,이종관,허성범 동의대학교 기초과학연구소 1999 基礎科學硏究論文集 Vol.9 No.1

This paper documented mophological changes of embryonic development and first zoea larvae of snow crab, Chionoecetes opilio. Female crabs were sampled by the Danish seine fishery at the depth about 200m in Sep. 1997 in the eastern coast of Korea. Female with newly berried eggs was reared at the water temperature of 5℃ till the time of hatching. The results obtained are as follows. Embryonic development : According to morphogenesis of fertilized eggs, the developmental process of the embryo was classified into the following seven stages : First stage (cleavage and blastula stage, 24 days) Second stage (gastrula stage, 72 days) Third stage (nauplius stage, 22 days) Fourth stage (metanauplius stage, 57 days) Fifth stage (stage of a pigmentary deposit in the compound eye, 30 days) Sixth stage (chromatophore appearance stage in maxillipede, 56 days) Seventh stage (hatching stage, 36 days) Larvae hatched as prezoeas and they molted to first zoea in about an hour. The first zoea is 4.6 to 5.1 ㎜ in length, 3.2∼3.6 ㎜ in width. The abdomen consists of five segments and a bifurcate telson.

동남참게, Eriocheir japonicus (De Haan)의 種苗生産에 關한 生物學的 基礎硏究 : 3. Physiological Study of Osmolality of the Body Fluid and Oxygen Consumption of the Larvae 3. 幼生의 體液 渗透質 濃度 및 酸素 消費에 關한 生理學的 硏究

李福奎,權晉洙 동의대학교 기초과학연구소 1994 基礎科學硏究論文集 Vol.4 No.1

Ion concentrations and osmolalities of the body fluid and oxygen consumption of the larvae of the freshwater crab, under the influence of various salinities and water temperatures were studied. The level of Na^+ and Cl^- ions in the body fluid of the crab placed in the low salinities (freshwater and 30% seawater) were higher at the low temperature(16℃) than high temperature (30℃). However, the crab in the high salinity (90% seawater), those ions in the body fluid were higher at the high temperature (30℃) than the low temperature (10℃). When the zoea larvae were young (first and second stages), the ion concentrations of the body fluid were more affected by salinities and temperatures of the media. The salinity levels of the media more influenced the levels of K^+ ions of the body fluid of the larvae than the temperature. The osmolalities of the body fluid of the larvae was almost isotonic when they were place at 70% seawater (24.5‰). Oxygen consumption of individual larva was lower in zoea 1 and 2 stages than the other stage larvae. The high oxygen consumption of the larvae was observed at 70% seawater compared to the other salinity levels.

大型 淡水産새우, Macrobrachium rosenbergii (De Man)의 生殖生理에 관한 硏究 : 수새우 생식기관과 정포의 형태 Structure of Male Reproductive Organ and Spermatophore

이복규,김병기,권진수 동의대학교 기초과학연구소 2000 基礎科學硏究論文集 Vol.10 No.1

In the giant freshwater prawn Macrobrachium rosenbergii, the paired tests were united by the testes bridge in a H-shape. During mating male discharged two hemispermtophores from right and left genital pore and they were joined and formed a compound spermatophore in peach shape. Hemispermatophore was considered to be produced at proximal and middle vas deferens region. The compound spermatophore consisted of an eosinophilic inner matrix, a basophilic outer matrix and paired sperm mass burried in the basophilic matrix. The size of compound spermatophore was 6.4∼9.3 mm in length and 2.4∼5.1 mm in width regardless of carapace length. After the spermatophore was deposited on female's ventral sternum behind of 5th pereiopod, it was moved to the ventral surface of 3rd and 4th pereiopods by means of the beating of male's 1st and 2nd pleopods.

스퍼터로 제작된 WO₃박막의 CMP 광역평탄화 특성

이우선,고필주,최권우,정수복,최창주 조선대학교 에너지.자원신기술연구소 2003 에너지·자원신기술연구소 논문지 Vol.25 No.2

Chemical mechanical polishing (CMP) process has been widely used to planarize dielectric layers, which can be applied to the integrated circuits for sub-micron technology. Despite the increased use of CMP process, it is difficult to accomplish the global planarization of in the defect-free inter-level dielectrics (ILD). We investigated the performance of WO₃ CMP used silica slurry, ceria slurry, tungsten slurry. In this paper, the effects of addition oxidizer on the WO₃ CMP characteristics were investigated to obtain the higher removal rate and lower non-uniformity.

고정 스트레스 상태의 흰쥐에서 할로페리돌 전처치가 뇌생아민의 대사에 미치는 영향

이수복,양병환,김이영,이용성,고재경,김광일 漢陽大學校 精神健康硏究 1991 精神健康硏究 Vol.10 No.-