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Kwonjung Kim,Inkyu Bae,Jinho Cho,Yangil Choi,Jungheun Ha,Jungseok Choi 한국축산식품학회 2019 한국축산식품학회지 Vol.39 No.2
The objective of this study was to determine effects of humic acid (HA) and blueberry leaf powder (BLP) supplementation in pig feed on productivity, blood profiles, and meat quality characteristics of longissimus muscle. The experimental design included six treatments: 1) CON, no addition; 2) T1, BLP 0.1%; 3) T2, BLP 0.2%; 4) T3, humic acid 2%; 5) T4: humic acid 2%+BLP 0.1%; and 6) T5: humic acid 2%+BLP 0.2%. HA and BLP supplementation in pig feed significantly increased average daily feed intake (ADFI) values (p<0.05). HA supplementation in pig feed had beneficial effects in lipid profiles without altering feed efficiency rate (FER). HA and BLP co-supplementation in pig feed decreased pH in longissimus thoracis (p<0.05). In addition, sensory characteristics were enhanced when pig feed was supplemented with HA and BLP without causing adverse effects in meat quality. Taken together, addition of HA and BLP in pig feed may produce functional meat products.
Structural analysis for final design of ITER sector In-pit Assembly Tool
Ha, Min-Su,Bae, Jinho,Nam, Kyoungo,Chung, Sikun,Park, Soo-Hyeon,Chung, Wooho,Hwang, Hyun-Sung,Ha, Jeong-Min,Moon, Jaehwan Elsevier 2018 Fusion engineering and design Vol.136 No.2
<P><B>Abstract</B></P> <P>The Sector In-pit Assembly Tool is special assembly tools to complete nine of the 40° sector which is sub-assembled in the assembly hall into tokamak machine at in-pit. The function of the Sector In-pit Assembly Tool is to support, and stabilize the sub-assembled 40° sectors during tokamak pit assembly. In order to assess the design and the structural integrity of the Sector In-pit Assembly Tool, the structural analyses have been performed under the load combinations according to load specifications including the SL-1 seismic load. There are thirty assembly configurations for Sector In-pit Assembly Tool. Three representative configurations of the assembly configurations are selected to assess the structural integrity. These configurations would be the worst configuration for the central column which is the main part of the tool. The results of the analyses show that the structural integrity meet the design requirements. This paper provides the result of the design for the Sector In-pit Assembly Tool.</P>
대형트럭 후미 어퍼가이드 장착에 따른 공력 저감 특성에 관한 연구
하진호(Jinho Ha),김철호(Chulho Kim),조인국(Inkook Jo),고범갑(Bumgab Ko) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Today is to be able to simulate accurately complex fluid phenomena and get commercial CFD code result fast in order to effectively apply them in the Aerodynamic design. This Paper is on the way of evaluating commercial vehicle(kinds of Heavy truck) aerodynamic performances by CFD simulation. The aerodynamic forces on vehicle can have a significant impact on overall performances. One major factor on commercial vehicle drag and lift force is the exterior design. On this numerical experiment, Drag and Lift force generated on the four different models of the drag reducing system were calculated and compared them each other to see which type of device is efficient on the reduction of driving power of the vehicles quantitatively. From the result, the Upper guide system(model 3, 4) were revealed as a better device for reduction of aerodynamic drag and lift force than normal system(model 1) on the commercial vehicle and it can be predicted that over 10% of Engine power can be saved on a heavy truck by aerodynamic drag reducing and lift increasing device at high speed range (80~110㎞/h).
하진호(Jinho-Ha),김현철(H.C-KIm),김철호(Chulho-Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
A wind turbine is one of the most popular energy conversion systems to generate electricity from the natural renewable energy source and an axial-flow type wind turbine is the most popular system for the electricity generation in the wind farm nowadays. In this study, a cross-flow type turbine has been studied for the application of wind turbine for electricity generation. The target capacity of electric power generation of the model wind turbine developing on the project is 12 volts, 130A/H (about 1.56㎾). The important design parameters of the model turbine impeller are the inlet and exit angle of the turbine blade, number of blade, hub/tip ratio and the exit flow angle of the casing. In this study, the radial equilibrium theorem was used to decide the inlet and exit angle of the impller blade and CFD technique was used to have the performance analysis of the designed model power turbine to find out the optimum geometry of the CPT impeller and casing. The designed CPT with 24 impeller blades at α=82°, β=40° of turbine blade angle was estimated to generate 284.6 N.m of indicated torque and 2.14㎾ of indicated power.
하진호(Jinho Ha),김철호(Chul-Ho Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
A Wind turbine is one of the most popular energy conversion systems to generate electricity from the natural renewable energy source and an axial-flow type wind turbine is commonly used system for the generation electricity in the wind farm nowadays. In this study, a cross-flow type turbine has been studied for the application of wind turbine for electricity generation. The target capacity of the electric power generation of the model wind turbine developing in this project is 12volts-150A/H(about 1.8㎾). The important design parameters of the model turbine impeller are the inlet and exit angle of the turbine blade, number of blade, hub/tip ratio and exit flow angle of the housing. In this study, the radial equilibrium theorem was used to decide the inlet and exit angle of the model impeller blade and CFD technique was incorporated to have the performance analysis of the design model power turbine for the optimum design of the geometry of the Cross-flow Power Turbine impeller and Casing. In CFD, Navier-Stokes equation is solved with the SIMPLEC method in a general coordinates system. Realizable k-ε turbulent model with MARS scheme was used for evaluating torque of each blade in the Cross-flow Power Turbine(CPT). From the result, the designed CPT with 24 impeller blades at α=40° and β=85° of turbine blade angle was estimated to generate 1.2Nm of the indicated torque and 200watts of the indicated power. On the basis of the rules of similarity, the generating power capacity of the real size CPT that is eight times longer than the model impeller is predicted to have an 1.6㎾ of the output power (about 12V-130A/H or 24V-65A/H).