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장방형 용기내 자성유체의 Benard유동에 대한 전열 제어 특성에 관한 연구
안종국,서이수,박길문 한국유체기계학회 2004 한국유체기계학회 논문집 Vol.7 No.4
This study deals with the Benard Flow of Magnetic Fluids in a rectangular cavity which the ratio between height and width is 1 : 4 and the base side or left side is a heating face while other sides are to be cooling faces. When Magnetic field was equally impressed, considering the internal rotation of the elementary ferromagnetic particle, we found the following result from the numerical analysis of the GSMAC algorithm applied to the equation of the magnetic fluid. Benard flow is controlled by intensity and direction of magnetic fields, and critical point appears when especially magnetic field with a heating base and side area near H=-7000 and H=-10000 is applied
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안종국,박명호 三陟大學校 2003 論文集 Vol.36 No.-
An experimental study about the effects of temperature and pressure on the burning velocity of gasoline-air, methane-air and methane/hydrogen-air mixtures has been conducted by a closed vessel technique. The experimental results show that the burning velocity of gasoline is slightly higher than that of methane, but their basic behavior of combustion characteristics, positive dependence on temperature and negative one on pressure, is the same, and 20 vol.% addition of hydrogen to methane enhances the burning velocity by about 30%, but does not come to reverse the tendency of pressure dependence to that of pure hydrogen.
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안종국 인제대학교 1987 仁濟醫學 Vol.8 No.3
슬개골 부정열(malaignment)에 의한 슬개골 동통이 고식적 치료 방법에 호전되지 않는 경우 외측지대절개술은 간단하고 적은 조작으로 비교적 좋은 결과를 얻을 수 있는 유용한 술식이다. Patellofemoral pain is common, particularly, in active young adult with patellofemoral malalignment and chondromalacia. Lateral retinacular release can be helpful in alleviating resistant patellofemoral pain. Through the procedure, following results were obtained. 1.Main indication for lateral retinacular release was the resistant patellofemoral pain with patellar malalignment. 2.In the patellofemoral joints, preoperatively, average sulcus angle was 136 and congruence angle was +12˚. 3.Of the 6 cases, good to excellent results was achived in 5 cases. 4.Lateral retinacular release is useful procedure for patellofemoral pain.
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안종국,박명호,김민주 三陟大學校 産業科學技術硏究所 2002 産業科學技術硏究論文集 Vol.7 No.3
This study is an investigation for the ADS optimum design by using FEM. We write out program which express ADS perfectly and reduce the required time for correcting of model to the minimum in solution and manufacture result. We complete algorithm which can plan optimum forming of model by feedback error information in CAE. For that, we draw up ADS program which modeling rachet wheel by using visual LISP and telegraph to ANSYS, structural solution program, we can solve stress solution. Then we correct model by feedback date obtaining in solution process, repeat course following stress solution again and do modeling rachet wheel for optimum forming. That is our aim. As a result of experience, we can develope automatic design program using Visual LISP and exhibit ADS as modeling third dimension CAD for optimum design. Also, we develop optimum design algorithm using ADS and FEM. In rachet wheel, greatest equivalence stress originates in key groove corner and KS standard is proved the design for security.
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安淙國 韓國作物學會 1993 Korean journal of crop science Vol.38 No.6
냉수관개가 벼 생육특성, 수량 및 미질관련 형질에 미치는 영향을 검토하기 위하여 작물시험장 춘천출장소 냉수처리포장에서 실시한 시험 결과를 요약하면 다음과 같다. 1. 냉수구에서는 자연구에 비하여 출수가 10~19일 지연되었고 간장과 수장은 17~31% 단축되었다. 수수는 일정한 경향이 없으며 품종간에 반응이 상리하였다. 2. 냉수구에서 영화수는 이삭당 10~35개가 감소되었고 등숙률이 현저히 떨어졌으며, 정조수량은 오대벼 치악벼등이 높은 수량을 나타낸 반면에 백암벼 소백벼 진미벼등은 낮은 수량을 보였다. 고중은 공시품종 모두 냉수구에서 높았다. 3. 현미 완전미율은 냉수구와 자연구간에 일정한 차이가 없었고 오히려 품종간의 변이가 크게 나타났고, 청미율은 자연구에서 많은 경향이며 연색미는 냉수구에서 월등히 높았다. 4. 백미 투명도및 알칼리 붕괴도는 수구쪽에서 높은 경향이며, 아밀로스 함량은 자연구에서 높았다. This experiment was carried out at Chuncheon substation, Crop Experiment Station to investigate the effect of cold water irrigation on the growth and grain yield of rice in 1990. Irrigation of cold water (17~circC ) delayed 10 to 19 days of heading, and reduced about 17 to 31% of plant height in terms of culm and panicle length. Number of panicle per plant was decreased and / or increased by cold water irrigation. Cold water irrigation reduced spikelet number per panicle and percent of filled grain. Grain yield was increased but, straw weight was decreased according to water temperature gradient from inlet to outlet. There was varietal differences in head rice recovery by cold water treatment. In general the dark brown and / or black colored kernel increased at cold water inlet but decreased percent of green kernel. Alkali digestible value increased and amylose content decreased at cold water inlet.
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안종국,김진혁,김성수,조범철,정락용,석세일 대한척추외과학회 2008 대한척추외과학회지 Vol.15 No.1
Study Design: Retrospective study Objectives: To evaluate the surgical outcome of congenital scoliosis with a hemivertebra treated by posterior hemivertebra excision and pedicle screw instrumentation. Summary of Literature Review: Posterior hemivertebra excision can be accomplished through a single posterior approach, and excellent correction and outcome may be achieved. Materials and Methods: Forty patients with one fully segmented hemivertebra treated by posterior hemivertebra excision with pedicle screw instrumentation were retrospectively analyzed after a minimum follow-up of 2 years (range 2~7.7 years). The mean age at surgery was 15.9 years (range 2.6~37.9 years). Preoperative and postoperative standing radiographs were used to assess radiographic parameters. Results: The average number of vertebrae in the major curve was 4.2 (range 3~8), and the average flexibility was 29% (range 8~59%). The average length of fusion was 3.5 segments (range 1~6). The number of fused vertebrae had a positive correlation with age at the index surgery (r=0.345, p 0.05). Mean preoperative scoliosis of 48±12。was corrected to a mean of 17±10。 (65% correction), and mean preoperative kyphosis of 46±18。was corrected to a mean of 12±12。at the most recent follow-up. The compensatory curve had a mean of 25±10。preoperatively and spontaneously corrected to a mean of 8±8。(70% correction) at the most recent follow-up. The mean operating time was 233±81 min, with an average blood loss of 2904 ml. There was neither crankshaft phenomenon nor iatrogenic spinal stenosis in 6 patients under the age of 5 years after an average follow- up of 6 years. Conclusions: Posterior hemivertebra excision using pedicle screw instrumentation in congenital scoliosis due to a hemivertebra is a safe and effective procedure. Posterior hemivertebra excision at an early age may reduce the fusion length while avoiding the induction of iatrogenic spinal stenosis during follow-up.
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