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유병찬,한영주,채은영,윤담희,이남헌,조충식,김철중,이지영,Yu, Byeong-Chan,Han, Yeong-Ju,Chae, Eun-Yeong,Yun, Dam-Hee,Lee, Nam-Hun,Cho, Chung-Sik,Kim, Chul-Jung,Lee, Ji-Yeong 대한한방내과학회 2004 大韓韓方內科學會誌 Vol.25 No.3
The following case studies illustrate the application of oriental medical treatment of patients diagnosed with neurogenical bladder. The outstanding symptoms of two cases were general weakening and voiding difficulty, urinary retention and lack of urine sense. In one case, neurogenical bladder was caused by an operation on the femur, and in the other case, by diabetes and anemia. Western medical treatment didnot have any effect in these cases, but after oriental medical treatment, self-voiding was possible. These resu1t suggest that oriental treatment should be considered for patients with neurogenical bladder.
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기하모델-볼륨모델간 실시간 변환을 이용한 기하모델 변형방법
유병찬,한상원,신병석 한국차세대컴퓨팅학회 2023 한국차세대컴퓨팅학회 논문지 Vol.19 No.1
With the development of virtual reality technology, various types of education/training simulations are being developed. An important technique in these simulations is to deform the object by an external force. Here, we will discuss how to process the deformation of a part of a solid object in real time. In this paper, we propose a geometric model transformation technique using two-step voxelization and adaptive remeshing. First, the target mesh is voxelized at high resolution and the generated volume data is compressed. If a part of the model is cut or polished by an external force, the corresponding voxel is modified by reflecting it in the converted volume data instead of directly applying it to the mesh. Then, the mesh is extracted again through the marching cube algorithm and the surface is smoothed through Laplacian smoothing. Existing marching cube algorithms and Laplacian smoothing algorithms have slow processing speeds, so real-time transformation processing is difficult. To solve this problem, real-time mesh creation was made possible by applying remeshing only to the deformed part instead of remeshing the entire mesh. In order to confirm the effectiveness of this method, it was confirmed that it is possible to shave part of the teeth by applying this method to dental surgery simulation. 가상현실 기술의 발전에 따라 다양한 종류의 교육/훈련 시뮬레이션들이 개발되고 있다. 이러한 시뮬레이션에서 중요한 기술은 외력에 의해 대상물체를 변형하는 것이다. 여기서는 단단한 물체의 일부가 깎이는 변형을 실시간에 처리할 수 있는 방법을 다루고자 한다. 이 논문에서는 2단계 복셀화(voxelization)와 적응형 리메싱(remeshing)을 이용한 기하모델 변형 기법을 제안한다. 먼저 대상 메쉬를 고해상도로 복셀화하고 생성된 볼륨 데이터를 압축한다. 외력에 의해 모델의 일부가 절단되거나 연마되면 이것을 직접 메쉬에 적용하는 대신 변환된 볼륨 데이터에 반영하여 해당 복셀(voxel)을 수정한다. 이후 Marching Cubes 알고리즘을 통하여 메쉬를 다시 추출하고 라플라시안 스무딩(Laplacian smoothing)을 통해 표면을 부드럽게 한다. 기존 Marching Cubes 알고리즘 및 라플라시안 스무딩 알고리즘은 처리속도가 느리기 때문에 실시간 변형처리가 어렵다. 이를 해결하기 위해 전체 메쉬에 대해 리메싱하는 것이 아니라 변형된 부분에 대해서만 리메싱을 적용함으로써 실시간 메쉬 생성이 가능하도록 했다. 이 방법의 유효성을 확인하기 위해 치과 수술 시뮬레이션에 이 방법을 적용하여 치아의 일부를 깎아내는 시술이 가능함을 확인하였다.
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Supra Pubic Catheter를 施行한 腦卒中 患者 1例에 對한 證例報告
유병찬,오병렬,김민상,안정조,임승민,최영,설인찬 대전대학교 한방병원 2002 惠和醫學 Vol.11 No.1
According to the literary study on catheterization of bladder in one case of patient with C.V.A. who was treated by supra pubic catheterization, the results were as follows. 1. If not immediately treat ischuria, emergency disease, very great danger to life can happen by loss of kidney function. So we must treat ischuria instantly by consideration of treatment from the factor. 2. Catheterization of bladder generally acted in emergency room, is emergency treatment only in the lower part of urethral obstruction. 3. Catheterization of bladder was put on record in Son Saimiao's Qianjinyaofang, which is the first book on it. It had been developed by Luo Qianyi, Zhang Jiepin, and Wang Dao. 4. Ancient times, an urethral catheter was made of green onion leaf, pig bladder, goose feather and so on. 5. Nelaton is catheterization of bladder in functional or momentary ischuria. Indwelling catheterization is treatment keeping in urethral canal for a long time. 6. Supra pubic catheterization is a surgical operating catheterization when urethral catheterization is impossible, is very easy and can decrease risk of infection. 7. After catheterization, for decreasing risk of the infection, a complication of catheterization, it is must be taken precedence, ascetic treatment, constantly management and sterilization, anti-biotic medication. 8. At times, increasing patient of emergency disease, as C.V.A etc., the needing of catheterization of bladder is increasing also for preventing infection and bed sore by ischuria and incontinence of urine. Therefore a specialty knowledge and skill about it is necessary.
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Multidimetional Uniform Semiclassical (WKB) Solutions for Nonseparable Problems
유병찬,Byung C. Eu Korean Chemical Society 1978 대한화학회지 Vol.22 No.4
Uniform semiclassical (WKB) solutions are obtained for nonseparable systems without using a close coupling formalism and are given explicitly in terms of well known analytic functions for various physically interesting and realistic cases. They do not become singular at turning points or surfaces and when taken in their asymptotic forms, they reduce to the usual WKB solutions that could be obtained if the Stokes phenomenon was properly taken care of for solutions. In obtaining such uniform solutions, the Schroedinger equations for nonseparable systems are suitably "renormalized" to solvable "normal" forms through certain transformations. Ehrenfest's adiabatic principle plays an important guiding role for obtaining such "renormalized" uniform solutions for nonseparable systems. The eigenvalues of the Hamiltonian can be calculated from the extended Bohr-Sommerfeld quantization rules when appropriate classical trajectories are obtained. An application is made to many-electron systems and for one of the simplest examples to show the utility of the method the approximate wavefunction is calculated of the ground state helium atom. 본 논문에서는 비분리계의 균일준고전(WKB)해를 close coupling formalism을 쓰지 않고 구하였으며, 여러가지 물리적으로 흥미있고 현실적인 경우들에, 구해진 해들이 잘 알려져 있는 해석 함수들로서 주어졌다. 전환점이나 전환면이 구해진 해들의 특이점이 되지 않으며, 그들의 점근형을 취했을 때, 그 해들은 보통의 WKB해들로 복귀된다. 그러한 균일해들을 얻기 위해서는 비분리계의 Schroedinger 방정식들을 변형하여 풀 수 있는 형으로 적절히 "재규격화"하였다. Ehrenfest의 단열 원리가 그러한 "재규격화"된 균일해들을 도출하는데 중요한 역할을 한다. 적절한 고전적 궤적들이 얻어지면 Hamiltonian의 고유치들은 확장된 Bohr-Sommerfeld 양자화 규칙으로 계산된다. 다전자계에 대한 응용이 시사되었고, 현 방법의 유용성을 보여주기 위한 가장 간단한 예의 하나로서 helium 원자의 바닥상태의 파동함수를 근사적으로 계산하였다.
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