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김철원,임상용,김승곤,오만원,김성찬,이창준,남사웅,이세형,류재청 濟州大學敎 體育科學硏究所 1996 체육과학연구 Vol.2 No.-
The study was undertaken to analysis, evaluate, and prescribe the annual effect of training of periodically anaerobic and erobic motor ability for Che-Ju representive team of elementary, middle and high school athletes, first the performance can be obtained when it was prescribed proper training after analysis of physical fitness by each events, second individually fitness scientific analysis. prescription. proper management of athlete will be necessary to apply.
국가 대표급과 제주도 고교 대표급 수영선수들의 그랩 스타트의 운동학적 분석
김철원,김승곤,오만원,임상용,김성찬,이창준,남사웅,이세형,류재청,신석종,김세민 濟州大學敎 體育科學硏究所 1998 체육과학연구 Vol.4 No.-
The purpose of the study was to undertaken to analysis the Grab starting technique between national representive team(3) and Cheju's representive team(3) with 3D cinematography. The conclusions obtained were as follows: Cheju's showed more elapsed time than national representive team on starting block. and more vertical than horizontal direction of COG position, more concentrated vertical velocity & acceleration than forward direction. Therefore It is necessory for cheju's to train balanced trust force in horizontal and vertical direction in grab starting technique.
생체분해성 망막압정을 이용한 망막고정에 대한 실험적 연구
김용백,민병무,김창식,박근성,김승영,길숙종,조항진,이성복,노승무,송규상,강대영,조준식,양준묵,정경수,최선웅,이진호,김학용,인현빈 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1
Biodegradable retinal fixation devices obtain mechnical fixation of the retina with desirable chorioretinal scarring and with the potential for local, sustained release of antimetabolites and steroids to inhibit proliferative vitreoretinopathy. We manufactured a biodegradable retinal tack with barb that was designed in order to prevent intrusion from implantation of retinal tacks. This study was carried to evaluate the efficacy for retinal fixation and the capability for sustained release of drugs with a newly designed biodegradable retinal tack Biodegradable retinal tacks were made of polymers of glycolic acids and were designed with barbs in a shape to prevent the disinsertion. Biodegradale retinal tacks are divided into 3 parts, a conical portion that is inserted into the sclera, a cylinder portion that remains in the vitreous, and a neck portion between the pin and the cylinder. The tapered conical end was manufactured to allow easy insertion through the retina and choroid into the sclera. A cylinder portion was manufactured with a tapered angle that fixes firmly into the orifice of 19 gauge spinal needle. A neck portion, 0.4 mm in diameter, was designed to prevent disinsertion from following implantation of retinal tack. The applicator was a 19 gauge spinal needle and its orifice was prepared to 15°angle to accept the tapered cylinder portion of the retinal tack. The retinal tacks, secured in the needles, were passed through the formed vitreous and inserted into the retina, choroid, and sclera and were released by pushing the internal needle, usually within 2-3mm of the medullary ray of the posterior rabbit retina A retinal tack was placed in each of 8 pigmented rabbit eyes. Slit-lamp biomicroscopy, indirect ophthalmoscopy and fundus photography were performed periodically from 1 day to 8 weeks after surgery. Eight eyes were enucleated and studied by light microscopy at 8 weeks. Biomicroscopic evaluation of the animals revealed edemas adjacent to the retinal surfaces immediately after insertion of the biodegradable retinal tacks in all the animals. These edemas disappeared after 1 week. The first noticeable change in the size of retinal tacks was shown after 2weeks. The size of the retinal tacks gradually got smaller, decreasing to about one-half at 4 weeks and about one-third at 8 weeks. All retinal tacks remained in inserted places without any movement for an 8 week period. On light microscopy, epiretinal proliferations were seen to extend into the vitreous cavity. Cellular capsules that lined the inner aspect of the scleral defect caused by tack insertion were found. However the adjacent retina had a normal cytologic appearance and architecture in all specimens. We manufactured a biodegradable retinal tack that is designed to prevent intrusion from implantation of retinal tacks. All biodegradable retinal tacks reduce in size with time, but no retinal tacks extruded from the inserted place. The newly designed biodegradable retinal tack can be used for retinal fixation and may be used as a vehicle for the introduction of pharmacologic agents to prevent the cellular events that promote proliferative vitreoretinopathy.
제주 우수 육상경기 선수들의 년중 훈련효과 분석 및 처방
김철원,임상용,김승곤,오만원,김성찬,이창준,남사웅,이세형,류재청 濟州大學敎 體育科學硏究所 1996 체육과학연구 Vol.2 No.-
The study was undertaken to analysis, evaluate, and prescribe t h e annual effect of training of periodically anaerobic and aerobic motor ability for Che-Ju representive team of elementary, middle and high school athletes. first. the performance can be obtained when it was prescribed proper training after analysis of physical fitness by each events. second, individually fitness. scientific analysis. prescription. proper management of athlete will be necessary to apply. In addition to physiology aspect, it is essential to consider sport biomechanics. sport psychology when we prescribe specific events and necessary approach in demension coach-athlete-researcher for individual.
생체분해성 고분자를 이용한 사시수술용 제형개발 및 효용성에 대한 연구
민병무,김용백,김승영,김창식,박근성,길숙종,조항진,이성복,노승무,송규상,강대영,조준식,양준묵,정경수,최선웅,이진호,김학용,인현빈 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1
A new device, muscle clamping system was developed to facilitate exact quatifying technique A strabismus surgery, and reduce the risk of complications. The device is composed of a lower fixing body with three jaws and an upper supporting body. They are used to clip an extraocular muscle and fix it to the sclera with a single bite. Superior rectus recession on 16 rabbit eyes were performed with this new device. Conjunctival injection, muscle adhesion strength, and light microscopic findings were examined at 1, 2, 4 and 8 weeks postoperatively. The Conjunctival injection were minimal, adhesion power ranged from 420 to 600 gram gravity, which is sufficient in withstand the normal pull of human extraocular muscle. In microscopic exam, some Inflammatory cells and fibrosis were found. The new device was technically easy, fast, and accurate, so it may be useful in stabismus surgery.
Si 및 C이 첨가된 일방향응고 TiAl-Nb 합금의 파괴인성
김성용,오명훈,위당문 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.3
The microstructure and mechanical properties of directional solidified Ti-47Al-3Nb, Ti-47Al-3Nb-0.2Si- 0.1C, Ti-47Al-3Nb-0.3Si-0.2C alloys were investigated. It was found that the lamellar thickness of Si and C doped alloys was fine and uniform, and little or no precipitates were found. Room temperature yield stress increased rapidly with increasing Si and C contents due to fine lamellar distribution and solid solution hardening. However, fracture toughness of type I specimens of the alloys decreased slightly with increasing Si and C contents. It was considered that α2 volume fraction decreased with increasing Si and C contents so that the delamination-type separation was decreased which contributes the high resistance of crack propagation for type Ⅰ specimens. Furthermore, fracture toughness of Ti-47Al-3Nb-0.2Si-0.1C alloy specimens with type Ⅰ orientation, polycrystalline form, and with type Ⅲ orientation increased in order of type Ⅲ, polycrystal and type Ⅰ. These results are discussed and the ability to obtain a respectable combination of strength and toughness through Si and C addition to a TiAl-Nb alloy produced by directional solidification is demonstrated.
지리산 반야봉의 구상나무(Abies koreana Wils.)林의 更新에 관한 硏究
金聖德,尹雄燮 忠南大學校 環境問題硏究所 1991 環境硏究 Vol.9 No.-
Regeneration process of climax coniferous forest in Mt. Jiri, Jeonranam-do Prefecture, was studied in relation to its structure. The dominant tress of the stands came up beyond 12m in helght. The upper tree layer was highly dominated by Abies koreana, Picea jezoensis and Pinus koraiensis, and they distributed horizontally in random. Trees of the middle and lower layer were few in number and small in basal area, and tended to be distributed contagiously. In the age distribution of trees, some of the even-aged cluster which were constituted of several trees, were found in plot. The rates of the stem diameter increment during the first 25 years of the trees in upper layer were heigher than those of the same species in the middle layer. These results seem to show that after the forest canopy had been broken out, the seedings which were established in dense there grew with the decreasing density, and some of these, of which distribution became in random, would consititute the canopy.
金雄成,田載植 충남대학교 1985 忠南科學硏究誌 Vol.12 No.1
Mean energy required to produce an ion pair, W-value, is one of the fundermental quantities in radiation physics and dosimetry. As a preliminary stage of W-value study a series of experimental measurement of Alpha particle ranges in several different gases was carried out. The gases used are air, N_2, CO_2 and CH_4 that are known as tisse equivalent, and the sources of alpha-particle used are ^241Am(E_α:5.48 MeV) and ^230Th(E_α:4.68 MeV), respectively. For the measurement of the range of alpha-particle in the gases, a chamber was specially designed and constructed in order to control the pressure of the gases from 200torr to 1500torr as well as the source-to-detector distance from 2 to 40 ㎝. The detector embedded in the chamber was a Si surface barrier detector, and the output signals were fed into a multichannel pulse height analyzer. The results obtained were assessed in comparison with theoretical calculation of the ranges in various condition and, very good agreements were drawn, except for the case of CH_4 gas which showed a slight descrepancy between experimental and theoretical values of the ranges. Throughout whole part of the study, a possibility of experimental measurement of dissipation energy of a charged particle in a gas at given pressure is shown on practical basis.