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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>
실험동물 사육실용 바이오 크린룸(BCR)의 급기 온도 및 풍속 변화 특성에 관한 수치해석적 연구
박동일(Dongil Park),정광섭(Kwangseop Chung),김영일(Youngil Kim),김성민(Sungmin Kim) 대한설비공학회 2012 설비공학 논문집 Vol.24 No.7
In this study, the analysis on the distribution of indoor airflow velocity and temperature by using numerical simulation has carried out to make fundamental data for establishing the optimum design of laboratory animal facilities. From the results, it was found that replacement of cage lacks, air supply and exhaust system, supply air temperature, supply air velocity affect to the optimum design of laboratory animal facilities as a important element.