http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Bond Strength of Mortar mixed Activated Hwangtoh
Go, Seong-Seok,Yeo, Sang-Ku,Lee, Hyun-Chul The Korean Institute of Building Construction 2012 한국건축시공학회지 Vol.12 No.5
This study aimed to mix and test mortar incorporating activated Hwangtoh to improve the Hwangtoh brick bond strength of brick structures. To do this, the bond strength correlation of mortar was analyzed by means of materials and experiment factors and levels, and the optimum conditions were suggested after analyzing the physical properties of brick and the mix ratio of mortar and additive. Furthermore, the compressive strength and bond strength were found to be in inverse proportion, and in terms of the materials and mixing level, W/C ratio, substitution ratio of activated Hwangtoh, and fine aggregate grading were shown to have a considerable influence on the strength. In conclusion, the optimum mixing conditions to improve the bond strength are found to set W/C ratio at 65% and replacmenet ratio of activated Hwangtoh at 10%.
Tetronic–Oligolactide–Heparin Hydrogel as a Multi-Functional Scaffold for Tissue Regeneration
Go, Dong Hyun,Joung, Yoon Ki,Lee, Sang Young,Lee, Myung Chul,Park, Ki Dong WILEY-VCH Verlag 2008 Macromolecular bioscience Vol.8 No.12
<P>A novel cell-supporting scaffold, Tetronic–oligolactide–heparin (TLH) hydrogel, was prepared by coupling heparin to polymerized Tetronic–oligolactide for use in improving tissue regeneration. Aqueous TLH solutions showed thermosensitive behavior, demonstrating potential for use as injectable hydrogels. The content and activity of conjugated heparin were determined to be 61 wt.-% of total polymer and 67.2% of intact heparin activity, respectively. The basic fibroblast growth factor (bFGF) binding assay showed TLH hydrogel had a relatively high bFGF affinity, which indicates applicability for growth factor delivery. Chondrocyte culture on hydrogels revealed that the cell viability and the amount of synthesized glycosaminoglycan for TLH hydrogel were higher than those for alginate gel.</P><P> <img src='wiley_img/16165187-2008-8-12-MABI200800098-gra001.gif' alt='wiley_img/16165187-2008-8-12-MABI200800098-gra001'> </P>
Go, Hyo-Sang,Ryu, Joon-Hyoung,Kim, Jae-won,Kim, Gil-Dong,Kim, Chul-Hwan The Korean Institute of Electrical Engineers 2017 Journal of Electrical Engineering & Technology Vol.12 No.1
An Electric Vehicle (EV) is operated with the electric energy of a battery in place of conventional fossil fuels. Thus, a suitable charging infrastructure must be provided to expand the use of electric vehicles. Because the battery of an EV must be charged to operate the EV, expanding the number of EVs will have a significant influence on the power supply and demand. Therefore, to maintain the balance of power supply and demand, it is important to be able to predict the numbers of charging EVs and monitor the events that occur in the distribution system. In this paper, we predict the hourly charging rate of electric vehicles using transformation matrix, which can describe all behaviors such as resting, charging, and driving of the EVs. Simulation with transformation matrix in a specific region provides statistical results using the Monte-Carlo Method.
A Study on Voltage Sag Considering Real-Time Traffic Volume of Electric Vehicles in South Korea
Go, Hyo-Sang,Kim, Doo-Ung,Kim, Jun-Hyeok,Lee, Soon-Jeong,Kim, Seul-Ki,Kim, Eung-Sang,Kim, Chul-Hwan The Korean Institute of Electrical Engineers 2015 Journal of Electrical Engineering & Technology Vol.10 No.4
This paper analyzes the effect of voltage sag on distribution systems due to the connection of Electric Vehicles (EVs). In order to study the impact of the voltage sag on the power system, two scenarios have been selected in this paper. The distribution system and EVs are modeled using the Electro Magnetic Transients Program (EMTP). The numbers of EVs are predicted based on the number of vehicles in distribution system of Seoul. In addition, the number of EVs is set up using real-time traffic in Seoul to simulate Scenario I and II. The simulation results show that voltage sag can occur if the distribution system has more than 30% of the total number of vehicles.
Design Consideration of Back-EMF Constant for 3-D.O.F. Spherical PM Motor
Sung-chul Go,Dong-woo Kang,Jong-bin Im,Ju Lee,Sung-hong Won,Seung-Bin Lim 한국자기학회 2010 Journal of Magnetics Vol.15 No.2
A 3-D.O.F. spherical PM motor has 3 degrees of freedom in its motion by tilting and rotating of a shaft, which can be applied in a range of fields. The back-EMF is proportional to the field flux and angular velocity. The back-EMF constant in conventional rotating machine has a uniform value. However, in a spherical PM motor, the back-EMF constant of the coils varies according to the tilting conditions regardless of whether the angular speed is constant. Consideration of the back-EMF constant is useful for designing 3-D.O.F. spherical PM motors. In this study, the back-EMF constant of the spherical PM motor was considered carefully.
A Study on EV Charging Scheme Using Load Control
Go, Hyo-Sang,Cho, In-Ho,Kim, Gil-Dong,Kim, Chul-Hwan The Korean Institute of Electrical Engineers 2017 Journal of Electrical Engineering & Technology Vol.12 No.5
It is necessary to charge electric vehicles in order to drive them. Thus, it is essential to have electric vehicle charging facilities in place. In the case of a household battery charger, the power similar to that consumed by a household with a basic contract power of 3kW is consumed. In addition, many consumers who own an electric vehicle will charge their vehicles at the same time. The simultaneous charging of electric vehicles will cause the load to increase, which then will lead to the imbalance of supply and demand in the distribution system. Thus, a smart charging scheme for electric vehicles is an essential element. In this paper, simulated conditions were set up using real data relating to Korea in order to design a smart charging technique suitable for the actual situation. The simulated conditions were used to present a smart charging technique for electric vehicles that disperses electric vehicles being charged simultaneously. The EVs and Smart Charging Technique are modeled using the Electro Magnetic Transients Program (EMTP).