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[논문]Operational Characteristics of CO2 Laser Adopted by Superposing-Discharge
Hee-Je Kim,Hyun-Ju Chung,Byoung-Dae Min,Jong-Han Joung,Sung- lun Park 釜山大學校生産技術硏究所 2003 生産技術硏究所論文集 Vol.62 No.-
오늘날 현저한 CO2 레이저의 응용 추세에 발맞추어 보다 다양한 형태의 출력 제어 기술이 대두되고 있다. 본연구에서는multi-Pulse Superposing-Discharge 기술을 이용하여 다양한형태의 CO2 레이저의 펄스를 성형 하였다. 펄스 성형을 위한 방법으로 PIC one-chip microprocessor를 이용하여 삼중 PFN 모률의 SCR을 각각 고유의 지연시간을 가지도록 제어하였다. 실험에 사용된 삼중 PFN 모률의 전원 회로는 각각 캐패시터 인덕터,SCR,고압 펄스 트랜스 그리고 고압 트랜스 2차측에 브릿지 정류기로 구성 하였다. 고압 펼스 트랜스의 1차측을 제어하므로서 PFN 모률의 동작을 저 전압에서 수행 할 수 있다. 트랜스의 2차측에 연결된 전파 정류기는 펄스 에너지를 부하에 지속적으로 전달한다. 본 연구에서는 삼중 PFN 모률의 각각의 SCR을 다른 시간 가격을 두고 트리거 하므로서 다양한 Long pulse shaping을 실현하였다. 또한 약 250-1000μs 의 주기를 가지는 다양한 펄스형 레이저 빔을 얻었다.
An Intelligent control of Mobile Robot Based on Fuzzy Perception
Byoung-Kyun Shim,Jin-Hwan Sok,In-Man Park,Sung-Hyun Han 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-
This paper present the theoretical development of a complete navigation problem of a non-holonomic mobile robot by using sonar sensors. To solve this problem, a new method to compute a fuzzy perception of the environment is presented, dealing with the uncertainties and imprecision from the sensory system and taking into account nonholonomic constraints of the robot. Fuzzy perception, fuzzy controller are applied, both in the design of each reactive behavior and solving the problem of behavior combination, to implement a fuzzy behavior-based control architecture. Different experiments in populated environments have proved to be very successful. Our method is able to guide the KUM-Robo safety and efficiently during long experimental time.
A Robust Control of Robot Arm Based on Neural Network Compensation
Byoung Kyun Shim,Tae-Hee An,Huu-Cong Nguyen,Hang-Bong Shin,Sung-Hyun Han 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-
In this paper, we present two kinds of robust control schemes for robot system which has the parametric uncertainties. In order to compensate these uncertainties, we use the neural network control system that has the capability to approximate any nonlinear function over the compact input space. In the proposed control schemes, we need not derive the linear formulation of robot dynamic equation and tune the parameters. We also suggest the robust adaptive control laws in all proposed schemes for decreasing the effect of approximation error. To reduce the number of neural of network, we consider the properties of robot dynamics and the decomposition of the uncertainty function. The proposed controllers are robust not only to the structured uncertainty such as payload parameter, but also to the unstructured one such as friction model and disturbance. The reliability of the control scheme is shown by computer simulations and experiment of robot manipulator with 8 axis.
Characterization of Cordierite by SEM, Microanalysis X and TEM
Han, Byoung-Sung 대한전자공학회 1990 전자공학회논문지 Vol. No.
The cordierite (MgO, SiO2, Al2O3) is of great interest for microelectronic packaging of integrated circuits. Its main advantages are low dielectric constant and low thermal expansion. The cordierite precursor is obtained by sol-gel synthesis using organic and inorganic compounds. The obtained cordierite precursor is an amorphous state at about 900\ulcorner. Green and fired cordierite samples were studied by SEM. Microanalysis X and TEM for microscopic properties. The fired cordierite shows forte diminution of Mg in comparison with its value at volume and the deficit of Mg compensates by sugmentation of Al and Si \ulcornercordierite and \ulcornercordierite are present near the surface (< 100) and small quantities of magnesium aluminate (MgAl2O4)is presented spinnel phase.
Han, Sang Duk,Jung, Sang Won,Jang, Sun Woo,Son, Miwon,Kim, Byoung Moon,Kang, Myung Joo Pharmaceutical Society of Japan 2015 Biological & pharmaceutical bulletin Vol.38 No.7
<P>The oral absorption of dronedarone (DRN), a benzofuran derivative with anti-arrhythmic activity, is significantly affected by food intake. The absolute bioavailability of the marketed product (Multaq, Sanofi, U.S.) was about 4% without food, but increased to 15% when administered with a high fat meal. Therefore, to reduce the food-effect on the intestinal absorption of DRN, a novel self-microemulsifying drug delivery system (SMEDDS) was formulated and the comparative in vivo absorption studies with the marketed product were carried out using male beagle dogs either in the fasted or fed state. The SMEDDS consisted of the drug, Labrafil M 1944CS, and Kolliphor EL in a weight ratio of 1?:?1?:?2, rapidly formed a fine oil-in-water emulsion with a droplet size less than 50?nm. An in vivo absorption study revealed that the area-under-curve (AUC0-24?h) and maximal plasma concentration (Cmax) were 10.4-fold (p<0.05) and 8.6-fold (p<0.05) higher, respectively, after the marketed product was orally administered to beagles in the fed state when compared to those in the fasted state. This food-effect were remarkably alleviated by SMEDDS formulation, with AUC0-24?h and Cmax 2.9-fold (p<0.05) and 2.6-fold (p<0.05) higher in the fed state when compared to the fasted state, by facilitating intestinal absorption of DRN in the fasted state. The results of this study suggest that SMEDDS may decrease the differences in oral absorption of DRN between the prandial states, improving therapeutic efficacy as well as patient compliance.</P>
Han, Sung Wook,Sang, Byoung Chan,Kim, Hong Ki 충남대학교 농업과학연구소 1990 농업과학연구 Vol.17 No.1
This study was conducted to estimate heritabilities and genetic correlations of economic traits and body conformations in Korean Native Ogol fowl. The data analyzed were the record of 450 pullets bred from 150 dams and 20 sires of the fowl obtained from June 18, 1987 to February 6, 1989. The results of this study were summarized as follows ; The estimates of. heritability for body weight, egg weight and shank length from combined variance components were relatively high, ranging from 0.415 to 0.558, while those for age at first egg, egg production and breast width were moderate, ranging from 0.301 to 0.334. For genetic correlations, body weights were negatively correlated with egg production, ranging from -0.552 to -0.309, while positive correlations were found between body weight and egg weight, ranging from 0.285 to 0.380. Also, egg production was negatively correlated with egg weight, ranging from -0.383 to -0.381. The shank length showed very high positive correlations with the body weights and age at Ist egg, ranging from 0.328 to 0.843. Hence the improvement in shank length will increase the body weight as well as the age at 1st egg.
Survey on the Use of Farming Materials in the Elementary School Vegetable Garden in Jeonbuk Area
Sang Mi Lee,Yoonah Jang,Young Chae,Kyung Sook Han,Byoung Kwon Lee,Sun Jin Jeong,Gyung Mee Gim 인간식물환경학회 2018 인간식물환경학회지 Vol.21 No.6
The purpose of this study is to analyze the patterns of farming materials required for creating and operating elementary school vegetable gardens and to propose a plan for vitalizing business related to urban agriculture. As a result of the survey, the farming materials purchased most for the operation of the school gardens were seeds materials focused on seedlings, compost/fertilizer, and farming tools focused on trowels, sprinklers, and hoes. Purchases of farming materials were made mostly through the internet, while most purchases of seedlings were made in pesticide stores. Therefore, it is necessary to provide information and education related to the use of farming materials. Thus, establishment and maintenance of highly accessible and reliable internet sources are recommended to provide the lists of farm products necessary as well as related information to help users in purchase and use in order to create and operate the school garden. In order to supply high-quality seedlings, it is necessary to provide information and education on the kinds of seedlings, management, cultivation, delivery methods, and the like, focusing on pesticide stores producing and distributing seedlings. Providing such information for participants will improve their satisfaction. Also, if businesses related to urban agriculture use these study results in producing, preparing, managing and selling seedlings and farming materials, they will also be able to generate profits and vitalize urban agriculture.
An Intelligent Control of Mobile Robot Based on Voice Command
Byoung-Kyun Shim,Kwang-wook Kang,Woo-Song Lee,Jong-Baem Won,Sung-Hyun Han 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
In general, it is possible to estimate the noise by using information on the robot’s own motions and postures, because a type of motion and gesture produces almost the same pattern of noise every time. In this paper, we describe an voice recognition control system for robot(VRCS) system which can robustly recognize voice by adults and children in noisy environments. We evaluate the VRCS system in a communication robot placed in a real noisy environment. Voice is captured using a wireless microphone. To suppress interference and noise and to attenuate reverberation, we implemented a multi-channel system consisting of an outlier-robust generalized side-lobe canceller technique and a feature-space noise suppression using MMSE criteria. Voice activity periods are detected using GMM-based end-point detection