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조재웅,한문식 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-
The force transducer in the acceleration plant due to dynamic fracture is calibrated by dynamically using the stress pulses from a longitudinal bar. The bar is supported by two strings attached to the ceiling. The bar velocities before and after impact are measured and a full bridge at bar and transducer is formed by the four strain gauges. A transient recorder is used to store the stress pulse signals of force transducer and bar. For the first test series, three point bend test specimens can be chosen by means of test rig design and the inspection as sample experiment in this presented paper is sufficient for proving with the numerical simulation of the specimen model.
판재에 있는 구멍 또는 이종재료 사이에서의 크랙 전파 거동
조재웅,한문식 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
This study investigates the behavior of fatigue crack propagating between holes or holes filled with another materials. When holes or the holes bonded with another materials exist near center crack symmetrically, crack propagation rate is influenced by the bonding force of brazing part and the elastic modulus ratio of another material to matrix. It is experimentally and analytically confirmed that the center crack stops when its tip reaches near the center line of the holes and a small crack is initiated from the boundaries of holes or the holes filled with another materials and it propagates to final fracture. The mechanical behaviors of center crack near another materials are also investigated.
조재웅,한문식 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-
This study investigates the fatigue life and the damage possibility of disk brake by the fatigue tool of Ansys workbench. Among nonconstant fatigue loads, the case of 'SAE Bracket History' which is severest at the variation of load tends to be most unstable. The case of 'Sample History' which becomes a little slow at the variation of load tends to be most stable. The maximum relative damage in case of 'SAE Bracket History' is occurred near the average stress '0' and this case can be shown to have the possibility to take more damage than another case.
VP-16으로 성공적으로 치료된 위 Kaposi 육종 1예
양웅석,송근암,조몽,이재승,송철수,김형욱,김영민,이수봉,김태오,이성훈 대한소화기내시경학회 1999 Clinical Endoscopy Vol.19 No.4
The skin is an uncommon site of distant metastasis from any internal malignancy, and the incidence of metastatic skin lesions as the first symptom of disease is only 0.8% in patients with all systemic malignancies. Furthermore, cutaneous metastasis from adenocarcinoma of the stomach has been found to be extremely rare. A 35-year-old female patient was admitted due to multiple cutaneous nodules in her chest, abdomen, and back. A gastroendoscopic examination and biopsy was made according to the results of skin pathologic findings. Stomach and skin biopsy results revealed a signet ring cell type of adenocarcinoma. A case of gastric adenocarcinoma in which metastatic skin nodules appeared as the first sign of disease, is here in reported with a review of related literature.
임응찬,한인웅,이승준,박재호,조방현,서형수,정구용,한기원,김진원,임상규,이재윤 三陟大學校 1996 論文集 Vol.29 No.2
By impproving the educational program of the Department of Architectural Engineering and studying the theory of learning and the applied method necessary for the development of nation and society, we should develop a satisfying course of education to meet the demand and skill in the industralized society for the purpose of cultivating men of baility with great personalities and creative minds. Therefore, this study focused on classifying several kinds of occupations in the prart of architectured related to what graduates from the department of Architectural Engineering go with into the society. Accordingly after choosing some works adequate to each occupation by the proposed curricula, we tried to establish the scope of education and courses corresponding to the jobs and thus and develop a satisfying curriculum.
유전체층을 갖는 정현형과 comb 격자구조에 대한 Off-Bragg TE blazing
홍재표,조웅희,백운석 동양대학교 2000 동양대학교 논문집 Vol.6 No.1
The analysis method for the electromagnetic scattering by sinusoidal and comb gratings covered with dielectric slab is considered for TE polarization case from the viewpoints of both reflection grating problem and leaky wave antenna problem. The analysis is based on a periodic Green's function and the method of moments. Integral equation is obtained for the currents induced on an infinite perfectly conducting grating and solved by use of the method of moments employing pulse Galerkin's scheme. Numerical results involving some combinations of geometric parameters are presented in terms of complex propagation constants and relative scattered powers of spectral modes.
접지된 유전체슬랩 위에 위치한 주기적인 스트립격자구조에서의 전자기적 산란공진 : TE 편파 경우의 off-Bragg blazing 현상
백운석,조웅희,홍재표 동양대학교 산업기술연구소 2000 東洋大學校 産業技術硏究所 論文集 Vol.2 No.1
The electromagnetic scattering characteristics by a periodic strip grating on a grounded dielectric slab for TE polarization case is examined from the viewpoints of both the reflection grating and the leaky wave antenna problems. Numerical results involving some combinations of geometric parameters are presented in terms of complex propagation constant, radiation pattern, and relative scattered powers of spectral modes. In particular, the relationship between complex propagation constant from the viewpoint of leaky wave antenna problem and off-Bragg blazing phenomena from the viewpoint of reflection grating problem is investigated.
황수철,국정한,조재웅,하영민 한국공작기계학회 1995 한국생산제조학회지 Vol.4 No.4
This study includes thermal plasticity analyses for a turbine rotor with the simple geometry and the boundary conditions. When centrifugal or thermal stress are applied at the high temperarture material of engine blade, stress distributions in material σ_rr, σ_θθ, τ_rθ. Mises stress) are analyzed by computer simulation(ABAQUS) as followings; 1. The maximum stress at the radial direction (σ_rr) is applied at the upper middle part of spline hole. 2. The maximum stress at the tangential direction (σ_θθ) is applied at the upper right boundary of spline hole. 3. The maximum shear stress (τrθ) in (-) direction is applied at the upper middle part of spline hole. 4. The maximum Mises stress is applied at the upper right boundary of spline hole. This stress is due to the critical stress by which rotor can be fractured according to elapsed time.