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FEA와 다이나모메터를 이용한 자동차 디스크 브레이크의 열적 거동에 관한 연구
박범식,손영지,장성규,전언찬 한국공작기계학회 2000 한국공작기계학회 추계학술대회논문집 Vol.2000 No.-
While braking cars, a large amount of energy is taken into the brake system in a short period of time. This leads to some problems ; cracking of the disc, non-uniform wear of pad and disc, fade. Thus it is important to measure the contact thermal behaviour precisely between disc and pad. The measurements must be considered to design the brake system. The paper describes methods to analysis the problem of the thermal behavior on the ventilated disc with ANSYS-a program of FEA and a brake dynamometer. According to this way, the paper can present the error between the data by the dynamometer and the results of analysis by ANSYS.
Son, Ho-Jin,Han, Won-Sik,Wee, Kyung-Ryang,Chun, Ji-Yun,Choi, Kyu-Bum,Han, Su Jung,Kwon, Soon-Nam,Ko, Jaejung,Lee, Chongmok,Kang, Sang Ook WILEY-VCH Verlag 2009 European journal of inorganic chemistry Vol.2009 No.11
<P>A series of four-coordinate boron compounds of the type N,O-(OPh<SUP>OxZ</SUP>ArX)BPh<SUB>2</SUB> or N,O-(OPh<SUP>OxZ</SUP>NPh<SUB>2</SUB>)BPh<SUB>2</SUB> (5a–g) has been prepared by treating triphenylboron (TPB) with2-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)-4-X-arylphenols(HOPh<SUP>OxZ</SUP>ArX; 4a–f) or 2-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)-4-(4-diphenylamino)phenol (HOPh<SUP>OxZ</SUP>NPh<SUB>2</SUB>; 4g). A systematic change in the electronic structures is achieved in these compounds by incorporating electron-withdrawing (EW) and -donating (ED) groups [ArX (X = 4-cyano-, 2,4-difluoro-, 4-chloro-, phenyl, 4-methoxy-, and 4-dimethylaminophenyl) or NPh<SUB>2</SUB>] at the 4-position of the phenoxide. The absorption and emission maxima of the ED groups show a significant red-shift compared to those observed in the EW groups. This red-shift suggests that π-conjugation is effectively extended over the arylphenoxides and oxazoline moiety once the boron center has been plugged into the corresponding ligands. The gradual decrease observed in the bandgaps on going from EW to ED groups is found to be in agreement with the increase in oxidation potentials determined by the cyclic voltammetry (CV) experiments. In particular, a Hammet plot between the EW and ED substituents and oxidation potentials confirms the ground state electronic perturbation. Such alterations are attributed mainly to an elevation of the energy levels of the HOMOs), as further confirmed by a series of theoretical calculations on the frontier orbitals of each system. The ED group (-NPh<SUB>2</SUB>) substituted compound 5g shows a bipolar character due to intramolecular charge transfer in the complex, with the highest photoluminescence quantum yield being obtained in toluene. This new boron complex was found to function as an emitter in electroluminescence (EL) devices, with a maximum brightness of 2905 cd/m<SUP>2</SUP> at 13 V and a current efficiency of 1.63 cd/A at 6 mA/cm<SUP>2</SUP>, with a turn-on voltage of 4.3 V.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)</P> <B>Graphic Abstract</B> <P>A series of electron-push and -pull aryl-substituted oxazolylphenolate ligands is synthesized and used to prepare boron compounds. The photophysical properties of these boron compounds are evaluated,and the corresponding EL properties studied through device fabrication by using them as emitting materials in a multilayer device. <img src='wiley_img/14341948-2009-2009-11-EJIC200900017-fig000.gif' alt='wiley_img/14341948-2009-2009-11-EJIC200900017-fig000'> </P>
A New Six-rowed, Covered Barley Cultivar, "Taegang" with Strong Straw
Seong Bum Baek,Jung Gon Kim,Sae Jung Suh,Moon Seok Kang,Gun Yong Park,Young Koo Son,Choon Woo Lee,Hong Sik Kim,Jung Hyun Nam,Jong Jin Hwang,Moon Woong Park,Jong Ho Lee 한국육종학회 2007 한국육종학회지 Vol.39 No.1
‘Taegang’ is a new six-rowed covered barley cultivar developed by the National Institute of Crop Science (NICS), R.D.A. This cultivar is developed from a cross between ‘Suwon287’ and ‘Olbori’ in 1992. An F8 selection was made at NCES in 2000 and it was te
Quality and Physicochemical Characteristics of Korean Maize Hybrids according to the Cultivar
Koan Sik Woo,Hwan Hee Bae,Hyun-Joo Kim,Ji Hae Lee,Byong Won Lee,Yu Young Lee,Beom-Young Son,Jung-Tae Kim,Jin-Seok Lee,Seong-Bum Baek,Sun Lim Kim,Byoung Kyu Lee 한국식품영양학회 2018 한국식품영양학회 학술대회논문집(학술심포지움) Vol.2018 No.12
A New Six-rowed, Naked and Waxy Barley Cultivar, "Saehanchal" with Strong Winter Hardiness
Seong Bum Baek,Jung Gon Kim,Sae Jung Suh,Moon Seok Kang,Gun Yong Park,Moon Woong Park,Jung Hyun Nam,Young Koo Son,Choon Woo Lee,Houg Sik Kim,Dae Ho Kim,Chang Yong Yun,Su Kyeong Kim 한국육종학회 2007 한국육종학회지 Vol.39 No.1
A new six-rowed naked waxy barley variety, ‘Saehanchal’, was developed by the barley breeding team of the National Institute of Crop Science (NICS), R.D.A. This variety was derived from a cross between ‘SB7803G-BC6-B-B-47-2’ and ‘Suwon262’ in 1989. The fi
A New Six-rowed, Covered Barley Cultivar, "Gwangan" with High Yield
Seong Bum Baek,Soon Jong Kweon,Dong Soo Park,Jong Nae Hyun,Jong Min Ko,Duck Yong Suh,Young Koo Son,Choon Woo Lee,Hong Sik Kim,Jong Jin Hwang,Jung Hyun Nam,Si Ju Kim,Jae Seong Choi 한국육종학회 2007 한국육종학회지 Vol.39 No.1
‘Gwangan’ is a new six-rowed covered barley cultivar developed by the National Institute of Crop Science (NICS), R.D.A in 2004. This cultivar is developed from a cross between “Mirak” and ‘Milyang59’ in 1995. An F6 selection was made at Milyang in 2001 an