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배현진 ( Bae Hyun Jin ),장근영 ( Jang Keun Young ),안윤규 ( An Yun-kyu ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.1
This paper proposes an automated crack evaluation technique for a high-rise bridge pier using a climbing robot. The proposed technique enables to automatically detect and quantify the bridge pier cracks even where cannot easily access by human for visual inspection. To achieve it, high quality images are obtained by scanning the vision cameras embedded on the climbing robot along the bridge pier surface. Then, a feature extraction-based image stitching algorithm is newly developed and applied for establishing the entire region of interest (ROI) images. The ROI images are then processed with a semantic segmentation algorithm for automated crack detection. Finally, the detected cracks are precisely quantified by a crack quantification algorithm. The proposed technique is validated using in-situ test data obtained from Jang-Duck bridge located at Gangneung city, South Korea. The test results reveal that the proposed technique successfully evaluate the bridge pier cracks with precision of 90.92 % and recall of 97.47 %.
裵長淳,李慶美 단국대학교 1993 論文集 Vol.27 No.-
The method of synthesis for silicon carbide by means of clay and industrial waste sawdust involves process of turning clay and sawdust by utilizing ferrous powder or ferric sulpate then baked within electric furnacd(700℃) produced coke. And then to the sample which fturned into coke NH_3, N_2 and H_2 gas were supplied and melted it (1500℃) and synthesized silicon carbide of β-SiC and by comparing the ferrous powder and ferric sulfate being employed at this time the rate of yield in the course of reaction was observed.
배일헌,한기석,차상훈,김성진,박길선,홍장수 충북대학교 의과대학 충북대학교 의학연구소 2003 忠北醫大學術誌 Vol.13 No.2
뇌혈관내 공기 색전증은 뇌혈관 조영술, 혈관내 도자술 시행시 발생하여 매우 심각한 합병증을 유발할 수 있다. 그러나 기흉의 합병증으로 발생한 경우는 보고된 적이 없다. 저자들은 기흉에 의하여 발생한 뇌혈관내 공기 색전증 1예를 경험하였기에 보고한다. Cerebral arterial air embolism is a potentially fatal event that may occur during the cerebral angiography and intravascular catheterization. The CT findings of cerebral arterial air embolism following pneumothorax have not been reported. We report a case of cerebral arterial air embolism following pneumothorax, and describe the CT findings.
공간벡터 PWM의 과변조 영역에서 출력전압 선형화에 관한 연구
배장호,김연충,원충연 成均館大學校 科學技術硏究所 1999 論文集 Vol.50 No.1
This paper proposes a linearization technique for the space vector modulation method, which increases the linear control range of inverter up to the 6-step inverter. This method is based on fourier series expansion of the desired output voltage of the inverter to calculate the compensation angle in continuous switching mode and holding angle in discontinuous switching including the 6-step mode respectively. The numerical data of these angles which are used for compensation of fundamental voltage in overmodulation range. Therefore, it is possible to obtain the linear control and the maximized utilization of PWM inverter output voltage.
배동석,이장명,윤종보 釜山工業大學校 1995 論文集 Vol.37 No.-
The process data are integrated and utilized for the production management, with the rapid development of analog measurement technology and with the wide spread of computer users. This trend draws more attention to the process data integration system which makes it possible to improve the quality of products, to classify and count the products automatically and to provide the basis for the production plan through the analysis and modification of process factors based upon the integrated process data. The system may be classified (either analog data of digital data) and the operating methodology of the system. Generally for the process control, it is necessary to set and monitor the reference and tolerance values of control-related process data, for example, temperature, rpm and pressure. In using the conventional analog controllers, it is not feasible to get the process data required for the quality control. Recently the digital controllers are developed. which have more accurate control capability and feasivility in getting the process data then the old controllers; the old are going to be replaced by the new. By utilizing the process data integration system, the analog controllers still can be used for the process control with the continuous quality improvement.
테트라 메칠 암모니움 하이드록사이드-觸媒에 의한 실록산의 平衡에 관한 硏究
裵長淳 단국대학교 1988 論文集 Vol.22 No.-
An experiment was made on an equilibrium mechanism of siloxane with a basic-catalyst of tetramethylammoniumhydroxide. In the equilibrium mechanism of siloxane, experiments were made on composition of reaction materials, mass ratio effect, effect of catalyst and equilibrium conditions resultant from reaction. Siloxanes used for these experiments were octamethylcyclotetra siloxane(D_4), hexamethyldisiolxane(MM), hexamethylcyclotrisiloxane(D_3), octamethyltrisiloxane(MDM) and decamethyltetrasiloxane(MD2M) etc. The reactions of siloxanes were diminishing in the order of D_4>MD_2M>MDM>MM.
실록산 重合促進에 관한 대메칠썰포옥사이드의 效果에 관한 硏究
裵長淳 단국대학교 1987 論文集 Vol.21 No.-
Polymerization of siloxane can be implemented by application of acid alkali as catalysis however according to amterials various methods should be searched. The study revealed that for the polymerization of siloxane application of dimethylsuloxide has more effectiveness than that of acid, alkali. The experimentation has been undertaken by transformation of density of sulfoxide according to number of mole of siloxane and then experiment on the extent of polymerization caused by changes of temperature and time.