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A robot manipulator on the mobile platform for an off-road environment
Chanhun Park,Dongil Park,GwangJo Jung,Doohyung Kim,KyungTaik Park,Chulhun Park,Taeyong Choi 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10
Need for the robot-manipulator on the mobile robot is increasing. If the mobile manipulator is used in the on-road environment, the design concept of the manipulator is not different. But if it is designed for an off-road environment, it has to be designed to get over the vibrational forces induced by the off-road traveling. For the mobile platform, the design concept and process have been developed by many researchers, but for the manipulator on the mobile robot for an off-road environment, enough researches have not been done. For this reason, the authors are developing the design concept of the off-road manipulator. In this paper, the research results of the design of a robot manipulator on the mobile platform for an off-read environment will be introduced.
Roles of Inflammatory Biomarkers in Exhaled Breath Condensates in Respiratory Clinical Fields
Hye Jung Park, M.D., Ph.D.,Yong Jun Choi, M.D.,Min Jae Lee, M.D.,Min Kwang Byun, M.D., Ph.D.,Sangho Park, B.S.,Jimyung Park, M.D., Ph.D.,Dongil Park, M.D., Ph.D.,Sang-Hoon Kim, M.D., Ph.D.,Young Sam K 대한결핵및호흡기학회 2024 Tuberculosis and Respiratory Diseases Vol.87 No.1
Background: Exhaled condensates contain inflammatory biomarkers; however, theirroles in the clinical field have been under-investigated. Methods: We prospectively enrolled subjects admitted to pulmonology clinics. Wecollected exhaled breath condensates (EBC) and analysed the levels of six and 12biomarkers using conventional and multiplex enzyme-linked immunosorbent assay, respectively. Results: Among the 123 subjects, healthy controls constituted the largest group (81participants; 65.9%), followed by the preserved ratio impaired spirometry group (21patients; 17.1%) and the chronic obstructive pulmonary disease (COPD) group (21patients; 17.1%). In COPD patients, platelet derived growth factor-AA exhibited strongpositive correlations with COPD assessment test (ρ=0.5926, p=0.0423) and COPD-specificversion of St. George’s Respiratory Questionnaire (SGRQ-C) score (total, ρ=0.6725,p=0.0166; activity, ρ=0.7176, p=0.0086; and impacts, ρ=0.6151, p=0.0333). GranzymeB showed strong positive correlations with SGRQ-C score (symptoms, ρ=0.6078,p=0.0360; and impacts, ρ=0.6007, p=0.0389). Interleukin 6 exhibited a strong positivecorrelation with SGRQ-C score (activity, ρ=0.4671, p=0.0378). The absolute serum eosinophiland basophil counts showed positive correlations with pro-collagen I alpha 1(ρ=0.6735, p=0.0164 and ρ=0.6295, p=0.0283, respectively). In healthy subjects, forcedexpiratory volume in 1 second (FEV1)/forced vital capacity demonstrated significantcorrelation with CC chemokine ligand 3 (CCL3)/macrophage inflammatory protein 1alpha (ρ=0.3897 and p=0.0068). FEV1 exhibited significant correlation with CCL11/eotaxin(ρ=0.4445 and p=0.0017). Conclusion: Inflammatory biomarkers in EBC might be useful to predict quality of lifeconcerning respiratory symptoms and serologic markers. Further studies are needed.
Geometric Nonlinear Behavior Of Shallow Shells By Boundary Conditions
Park, Kanggeun,Lee, Dongwoo,Choe, Dongil,Park, Mijin SSNG Education Society 2017 International journal of latest trends in engineer Vol.8 No.4
<P> This paper investigates the mechanical characteristics of geometrical nonlinear behavior of shallow shells for boundary conditions of support. The shallow shells with a low rise-span ratio have a snap back and through behavior for a load condition or a support condition. The analytical models are a spherical shell, a cylindrical shell and a quadratic shell. The shells with all its edges hinged or fixed support condition are subjected to a concentrated load at the crown. The load is applied gradually by incrementing the deflection by displacement control. The objective of the study is to compare the load deflection curves according to support conditions or thicknesses. The element in the nonlinear analysis used 3-D four/eight nodes shell element and 3-D laminated composite shell element. In geometric nonlinear behavior of shallow shells, it will be observed for snap back and through behavior for a hinged and fixed support condition. The snap through phenomenon cannot be found in the load deflection curve of shells with the fixed support and the good results are observed for large deflection analysis of shells with hinged supports. </P>
Dongil Shin,Sungnam Kim,Geunseok Jeong,Jaesu Park,Joungwook Park,Ki Jin Han,Jingook Kim [Institute of Electrical and Electronics Engineers 2015 IEEE transactions on electromagnetic compatibility Vol.57 No.4
<P>A common-mode (CM) active filter was designed in a compact package to suppress CM conducted emissions at a switching mode power supply (SMPS). Based on the analytical expressions considering both stability and performance, the design and optimization rules for the proposed active filter have been presented. After verifying its performance by measurements using vector network analysis, the proposed filter was installed in a 200-W SMPS board with 64 and 110 kHz switching frequencies, demonstrating its usefulness by experiments. The performance degradation due to the magnetic saturation and the AEF grounding impedance was also analyzed and investigated.</P>
The Evaluation of a General Purpose Bale System Performance and Its Bale Quality
Chang, Dongil,Chung, Sun-Ok,Cho, Byoung-Kwan,Park, Dongseok,Sung, Namseok,Kim, Jungchul,Lee, Inhyun,Park, Jutaek Korean Society for Agricultural Machinery 2013 바이오시스템공학 Vol.38 No.4
Purpose: The objectives of this study were to develop a general purpose baler system that is appropriate for the domestic forage cultivation environment and operated by the medium size tractor for production of bale silage made of green forage crops, and to test its performance. Methods: In a first experiment, the time of formation per one bale and densities of bales that are produced from bale system, were measured. In a second experiment, power requirement was measured by a power measurement system manufactured during bale system work. Results: The power measurement system was constructed with strain-gage sensors to measure torque of a PTO axle and proximity sensor to measure rotating speed of a PTO axle. Thus, the power requirement was calculated by PTO torque and PTO rotating speed. For evaluation of bale quality, the samples of bales were analyzed for contents of moisture, ADF, NDF and TDN. Conclusions: If the results of this study will be utilized, the coefficient of utilization of agricultural machinery will be increased by the operation of a medium size tractor that is a major disseminated tractor in farm, and it will contribute tremendously to make a forage production base for livestock farms.
박동일(Dongil Park),최태용(Taeyong Choi),김휘수(Hui-su Kim),송성혁(Sung-hyuk Song),박찬훈(Chanhun Park) 한국생산제조학회 2020 한국생산제조학회지 Vol.29 No.6
The demand for industrial robots has spread across several markets, ranging from the automobile market to the electric and electronic markets, including various IT products. Consequently, the demand for assembly process automation using robots is gradually increasing. Control technology for assembly processes using robots can be classified into two categories. The first method involves force control-based robot control, wherein the robot is actively directed for controlling assembly reaction forces. In the second method, assembly implementation is performed by attaching a passive compliance mechanism to the robot. However, in both methods, implementation of the assembly process through a commercial industrial robot can be difficult. To address this issue, we developed a gripper that can implement the assembly process through a commercial industrial robots which are operated in position-control based robot control. Furthermore, the obtained results are summarized in this paper.