고주파 영역 분할 웨이브렛 변환을 이용한 영상 부호화 ( Image Coding Using High Frequency Domain Partitioning in Wavelet Transform )

문찬,허태원,최중한,이근영 대한전자공학회 1995 대한전자공학회 학술대회 Vol.1995 No.7

정사각형 단면의 90˚곡관내 난류유동 특성에 관한 연구

문찬,김복석,김홍빈 순천대학교 공업기술연구소 1995 工業技術硏究所論文集 Vol.9 No.-

The fields of turbomachinery and electrical generators provide many examples of flow through internal passages, at the range of Reynolds Numbers occuring in practice. The flow motion is three dimensional and highly turbulent in most of cases. An adequate understanding. for the characteristic of these turbulent flow is needed for the design of thermo-fluid machinary with a good efficiency. The effect of the curvature on th structure of turbulence in the curved passage have been extensively by many workers, but the effects of curvature have not been well understood inspite of the impotance of the phenomena in the practical design process. In this study, the characteristics of the three-dimensional turbulence flow in a square sectioned 90o bend were investigated by numerical simulation and experiment, and the results were compared with the results obtained by simulation with four near wall turbulence models and experiments.

압축플랜지가 감소된 합성보의 휨내력에 관한 연구

문찬일,정재훈,주경재 대한건축학회 2000 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.20 No.1

대수응력모델 개선에 관한 연구

문찬 순천대학교 공업기술연구소 1994 工業技術硏究所論文集 Vol.8 No.-

Fine grid computations are attempted on the turbulent flows near wall turbulent regin through 2 dimensional channel flow, circular pipe flow and a square sectioned 180° Bend flow. For the development of algibraic stress model ASM constant C_1, C_2, C_3 are calculated turbulence models are tested in the pipe flow, channel flow, and 180° square duct flow. The application of a present ASM to the prediction of channel flow pipe flow and square sectioned 180 °Bend flow gives improved velocity profiles and Reynolds stresses compared with those obtained by using Launder-Shima's(1988) ASM.

복압성 요실금 환자에서의 Tension-free Vaginal Tape수술과 Transobturator Vaginal Tape Inside-out 수술의비교 연구

문찬,노준,김철성,임동훈,문형윤 대한배뇨장애요실금학회 2007 International Neurourology Journal Vol.11 No.1

Purpose: We compared the preoperative with the postoperative outcomes between tension-free vaginal tape (TVT) and transobturator vaginal tape inside-out (TVT-O) for the surgical treatment of female stress urinary incontinence Materials and Methods: From January 2003 to December 2005, 72 women, one is TVT group (n=52) and the other is TVT-O group (n=20), after operation following were assigned. The preoperative and postoperative evaluations analysis and urodynamic study and Korean version of I-QoL, surgical outcomes, complications and uroflowmetry were analysed. Results: All outcomes included the patients`states, incontinence quality of life (I-QoL)(p=0.013), the success rate of the cure (p=0.003) and the rate of the patient satisfaction (p=0.001) were not comparable statistically between two groups and there are no differences and no long-term complications such as bladder perforation or prolonged voiding difficulty. Preoperative and postoperative uroflowmetry was similar between the two groups. Mean operation time (TVT: 15.6 min, TVT-O: 13.2 min) was significantly shorter in TVT-O than in TVT. Conclusion: The observation of 1-year following-up shows the equally effectiveness between two groups (TVT and TVT-O) as the surgical treatment of stress urinary incontinence. (J. Korean Continence Society 2007;11: 41-46)

여성 복압성요실금에 대한 Tension-free Vaginal Tape(TVT) 수술 성적

문찬,강윤일,김경영,문형윤,노준,김철성 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Background: We wanted to evaluated the long term results of the tension-free vaginal tape (TVT) Procedure for treating strss urinary incontinence in women. Method: During Octover 1, 1998 to December 31, 2005, we evaluated the 52 women who underwent the TVT procedure for stress urinary incontinence at least 1 year following surgery. Preoperatively, Patients were evaluated with history taking, Physical examinations and urodynamic study, Operation and hospitalization data were evaluated with duration of procedure, hospital days, foley catheter removal days and use of analgesics, Postoperative evaluations included the uroflowmetry, residual urine volume, surgical outcomes, complications and patients' satisfaction with the procedure. Results: The follow-up period was a mean of 16 months. Preoperative I-QoL total score was 58.0. Comparision the result between preoperative and postoperative Q max was significantly shoter in the postoperative result. TVT procedure remained cure in 96.2% (cured: 82.7%, improved: 13.5%) and successful in 96.1%. Also, 49(94.2%) Patients would like to recommended the TVT procedure to others. There was no serious or long-term complications, Conclusions: The TVT procedure appear to be effective and safe for the surgical treatment of female stress urinary incontinence and showed a good long-term cure rate.

o-Chlorobenzylidene malononitrile (CS) gas가 흰쥐 기관상피세포내 소기관에 미치는 영향

문찬일(Chan-Il Moon),김원규(Won-Kyu Kim) 대한체질인류학회 1998 해부·생물인류학 (Anat Biol Anthropol) Vol.11 No.1

시위진압과 화학무기로 사용되는 최루성 가스인 o-chlorobenzylidene malonointrile (CS) gas 는 어려 장기에 독성으로 작용함은 이미 잘 알려져 있으며, cs gas를 투여받은 사랑에서 호흡마비, 호홉저하 및 심박동의 증가와 혈압상승 등의 많은 유해성이 입증되고 있다。 이러한여러 가지 유해성을 가지고 있음에도 불구하고 현재도 시위진압용으로 CS gas 가 다량 사용되고 있는 실정이다。 이에 본 연구자들은 CS gas 흡입으로 인한 실험동물의 기관상피세포내 미세구조에 나타나는 변화를 연구하고자 본 실험을 시행하였다. 본 실험에서는 체중 150 gm 내외의 건강한 흰쥐를 사용하였고, 일정량의 CS gas 폭로를 위하여 1m³크기의 plastic chamber 를 특수 제작하여 매일 2gm 의 CS gas 을 chamber 내에 20 분간 분사하여 3 일간 흡입시키고 최종 투여후 1 시간 3 시간, 6 시간, 12 시간,1 일, 3 일 및 5 일 경과후에 실험동물을 희생시키고 기관을 절제하여 기관상 피섬모세포내 소기관의 변화를 관찰하기 위하여 일반적인 전자현미경 조직표본제작방법에 따라 전자현미경 조직 표본을 제작한 후 Hitachi H -600 투과전자현미경으로 관찰하고 다음과 창은 결과를 얻었다. 1 CS gas 투여후 1 시간 경과군에서 과립세포질세망의 수조가 다소 확장되어 있었고, Golgi 복합제는 수조가 위축되어 있었으며 이중막이 파괴된 과립제와 포식공포가 관찰되었다. 2 CS gas 투여후 3 시간 경과군에서 이중막이 파괴되거나 사립제능선이 용해되고 종창된 사립제가 관찰되었고,과렵세포정세망은 수조가 단정 및 낭상화되어 있었으며, 일부의 수조에서는 리보소제가 탈락되에 있었다. 3 CS gas 투여후 6 시간 경과문에서 과립세포정세망의 수조가 극도로 확장, 단정 및 낭상화되에 있었고, 사립체의 이중막이 파괴되거나 사립세능선이 용해된 고도로 손상받은 사립체가 관찰되었으며, 포식공포와 용해소제가 관찰되었다. 4 CS gas 투여후 12 시간 경과군에서 일부 사립체에서 사립제능선이 종창되어 있었다. 5 CS gas 투여후 1 일 경과군에서 사립체능선이 용해된 사립체와 수조가 다소 확장된 Golgi 복합제가 관찰되었고 포식공포와 용해소제가 관찰되었다. 6 CS gas 투여후 3 일 경과군에서 세포정청부에 많은 기저체 및 기저제로부터 기원한 성모가 기관의 내강을 향하여 돌출되어 있었으며, 세포질내에는 많은 사립제와 과립세포질세망, 용해소체, 다소포체 벚 포식공포가 관찰되었다. 7 CS gas 투어후 5 일 경과군에서 5-6 층의 수조로 이루어진 장 발달된 Gol 및 복합체, 사업제 및 과립세포질세망이 관찰되었다. 이상의 결과를 총화하면 CS gas 에 노출되면 즉시 기관상피 섬모세포내 소기관에 손상을 유발하여 세포내 소기관에 변성을 초래하나, 이러한 소견은 시간이 경과함에 따라 휘복되는 것으로 사료된다

3關節型 MANIPULATOR의 運動에 關한 硏究

文燦 순천대학 새마을연구소 1987 새마을硏究論文集 Vol.3 No.-

This paper discribes mechanical manipulators of 3 degress of freedom. The Equations of mot-ion of manipulators are highly non-linear differential equations, and it is difficult to get The Solu-tions Therefore it is Sometime Convinient to transform them into linear forms to solve them easily.

단독총장골동맥류에 의한 후복막강섬유화증과 이차적으로 발생한 요관협착

문찬,강윤일,문형윤,노준,김철성 대한비뇨의학회 2006 Investigative and Clinical Urology Vol.47 No.11

섬광법을 이용한 박판의 역활산계수 측정에 관한 연구

김홍빈,문찬 順天大學校 1994 論文集 Vol.13 No.1

□A short energy pulse is irradiated on the front surface of thin flat specimen.The resulting temperature-time history of rear surface is recorded and subsequently analyzed to yield the thermal diffusivity by the equation which is derived in idealized and simplified model. It is assumed that the heat flow is one dimensional and the heat pulse is instantaneous and uniform over the entire sample surface. But frequently these conditions are frequently not adequately met. This paper is concerned in the finite pulse- time effect and the aspect ratio effect in partial irradiation on the sample surface.For the finite pulse-time effect, finite pulse width correction factors are calculated by the numerical analyses and compared with the analytic solution. The aspect ratio effects in the partially irradiated specimen are examined by the numerical ananysis of heat conduction equation. The specimen with apect ratio of more than 10 can be considered as one-dimensional specimen.The theoretical equation α=1.37.L²/π²t for the thermal diffusivity with simplified assumptions can be used.