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Seungwoo Hong,Jongyong Nam,Sungjoon Park,Eui S. Jung,Woojin Park,Jaeho Choe 대한인간공학회 2007 대한인간공학회 학술대회논문집 Vol.- No.-
The purpose of this study is to determine preferred locations for various in-vehicle controls that require manipulation during vehicle operation and to analyze differences of customer’s preference between Korean drivers and American drivers. 23 in-vehicle controls that are related to the interior design of vehicles were considered in terms of the frequency of use and the need for quick operation. They are switches for outside rearview mirrors, cruise controls, etc. Frequency of use means how often this control is operated while staying in a vehicle, either stationary or moving and the need for quick operation means how important it is to be able to operate this control quickly when needed. For each of the listed controls, Korean drivers and American drivers evaluated preferred locations according to the frequency of use and the need for quick operation by subjective ratings in 9-point scales. Among 8 predefined zones inside a vehicle, Korean drivers and American drivers were asked to select at least one choice for locating each of the controls. 8 zones inside vehicle defined for this survey were door trim, center fascia and so on. 30 Korean drivers with driving experiences of 9 years on the average and 30 American drivers with driving experiences of 21 years on the average participated in the survey as subjects. The survey suggests that there exist certain perceptual differences between Korean and American drivers regarding the frequency of use and the need for quick operation. Also, there are differences in determining preferred locations for various in-vehicle controls. The results also indicated that Korean drivers are different from American drivers such as culture patterns, mental propensity, a way of thinking in subjective preference. Therefore, various in-vehicle controls must be properly researched before the design is determined the location of.
Hong, Seungwoo,Lee, Yong-Min,Cho, Kyung-Bin,Sundaravel, Karuppasamy,Cho, Jaeheung,Kim, Myoung Jin,Shin, Woonsup,Nam, Wonwoo American Chemical Society 2011 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.133 No.31
<P>Mononuclear nonheme iron(IV)-oxo complexes with two different topologies, <I>cis</I>-α-[Fe<SUP>IV</SUP>(O)(BQCN)]<SUP>2+</SUP> and <I>cis</I>-β-[Fe<SUP>IV</SUP>(O)(BQCN)]<SUP>2+</SUP>, were synthesized and characterized with various spectroscopic methods. The effect of ligand topology on the reactivities of nonheme iron(IV)-oxo complexes was investigated in C–H bond activation and oxygen atom-transfer reactions; <I>cis</I>-α-[Fe<SUP>IV</SUP>(O)(BQCN)]<SUP>2+</SUP> was more reactive than <I>cis</I>-β-[Fe<SUP>IV</SUP>(O)(BQCN)]<SUP>2+</SUP> in the oxidation reactions. The reactivity difference between the <I>cis</I>-α and <I>cis</I>-β isomers of [Fe<SUP>IV</SUP>(O)(BQCN)]<SUP>2+</SUP> was rationalized with the Fe<SUP>IV/III</SUP> redox potentials of the iron(IV)-oxo complexes: the Fe<SUP>IV/III</SUP> redox potential of the <I>cis</I>-α isomer was 0.11 V higher than that of the <I>cis</I>-β isomer.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2011/jacsat.2011.133.issue-31/ja204008u/production/images/medium/ja-2011-04008u_0004.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja204008u'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja204008u'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja204008u'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja204008u'>ACS Electronic Supporting Info</A></P>
Hong, Seungwoo,Wang, Bin,Seo, Mi Sook,Lee, Yong‐,Min,Kim, Myoung Jin,Kim, Hyung Rok,Ogura, Takashi,Garcia‐,Serres, Ricardo,Clé,mancey, Martin,Latour, Jean‐,Marc,Nam, Wonwoo WILEY‐VCH Verlag 2014 Angewandte Chemie Vol.126 No.25
<P><B>Abstract</B></P><P>High‐spin iron(III) iodosylarene complexes bearing an N‐methylated cyclam ligand are synthesized and characterized using various spectroscopic methods. The nonheme high‐spin iron(III) iodosylarene intermediates are highly reactive oxidants capable of activating strong CH bonds of alkanes; the reactivity of the iron(III) iodosylarene intermediates is much greater than that of the corresponding iron(IV) oxo complex. The electrophilic character of the iron(III) iodosylarene complexes is demonstrated in sulfoxidation reactions.</P>
Hong Bong-Hwan,Cho Ilsung,Min Sun-Hong,Park Seungwoo,Kim Minho,Jung Hyunwoo,박차원 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.77 No.12
Boron neutron capture therapy (BNCT) is a more efficient cancer treatment method compared to direct radiation therapy using charged particles such as protons or carbon beams. Particularly, accelerator-based BNCT (AB-BNCT) is attracting attention due to easy construction in a hospital. The Korea Institute of Radiological & Medical Sciences (KIRAMS) has constructed an injection system for an electrostatic AB-BNCT accelerator and commissioned 30 keV H- and 5 keV D- ion beam facilities. The beam characteristic parameters and Twiss parameters should be confirmed experimentally, and various methods have to be applied for the related measurements. In this study, the linear matrix formalism is used as a technique to measure the beam characteristic and Twiss parameters by varying the magnetic field strength of a solenoid in the beam line. To confirm the validity of this method, a multi-particle tracking code was executed. The simulation results confirm that the proposed method is effective for extracting Twiss parameters. After verification via the multi-particle tracking code, the method was applied to perform experimental measurements. Notably, the method accurately obtains the transverse beam emittance within reasonable uncertainty levels. Thus, our results show that the proposed method is a convenient technique for extracting the Twiss parameters indirectly. The results of the Twiss parameter measurement can potentially be more precise if other aspects, such as the quadrupole magnetic field strength, are incorporated.
Hong, Seungwoo,Lee, Yong-Min,Shin, Woonsup,Fukuzumi, Shunichi,Nam, Wonwoo American Chemical Society 2009 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.131 No.39
<P>One primary goal in biomimetic research is to understand mechanisms of dioxygen activation, structures of reactive intermediates, and reactivities of the intermediates involved in catalytic oxidation reactions by metalloenzymes, such as heme and nonheme iron oxygenases. In this communication, we have reported the first example of generating nonheme iron(III)-hydroperoxo and iron(IV)-oxo complexes by activating O(2) with a biologically important electron donor, an NADH analogue, and an acid. The formation of iron(III)-hydroperoxo and iron(IV)-oxo complexes was found to depend on the supporting ligands. We have also demonstrated that high-spin nonheme iron(II) complexes with a low oxidation potential are able to bind and activate O(2) to generate the iron-oxygen intermediates.</P>
Hong, Seungwoo,Yan, James J.,Karmalkar, Deepika G.,Sutherlin, Kyle D.,Kim, Jin,Lee, Yong-Min,Goo, Yire,Mascharak, Pradip K.,Hedman, Britt,Hodgson, Keith O.,Karlin, Kenneth D.,Solomon, Edward I.,Nam, W Royal Society of Chemistry 2018 Chemical science Vol.9 No.34
<▼1><P>X-ray structures of nonheme {FeNO}<SUP>6</SUP> and iron(<SMALL>III</SMALL>)-nitrito complexes bearing a tetraamido macrocyclic ligand are reported along with three different generation pathways.</P></▼1><▼2><P>While the synthesis and characterization of {FeNO}<SUP>7,8,9</SUP> complexes have been well documented in heme and nonheme iron models, {FeNO}<SUP>6</SUP> complexes have been less clearly understood. Herein, we report the synthesis and structural and spectroscopic characterization of mononuclear nonheme {FeNO}<SUP>6</SUP> and iron(<SMALL>III</SMALL>)–nitrito complexes bearing a tetraamido macrocyclic ligand (TAML), such as [(TAML)Fe<SUP>III</SUP>(NO)]<SUP>–</SUP> and [(TAML)Fe<SUP>III</SUP>(NO<SUB>2</SUB>)]<SUP>2–</SUP>, respectively. First, direct addition of NO<SUB>(g)</SUB> to [Fe<SUP>III</SUP>(TAML)]<SUP>–</SUP> results in the formation of [(TAML)Fe<SUP>III</SUP>(NO)]<SUP>–</SUP>, which is sensitive to moisture and air. The spectroscopic data of [(TAML)Fe<SUP>III</SUP>(NO)]<SUP>–</SUP>, such as <SUP>1</SUP>H nuclear magnetic resonance and X-ray absorption spectroscopies, combined with computational study suggest the neutral nature of nitric oxide with a diamagnetic Fe center (<I>S</I> = 0). We also provide alternative pathways for the generation of [(TAML)Fe<SUP>III</SUP>(NO)]<SUP>–</SUP>, such as the iron–nitrite reduction triggered by protonation in the presence of ferrocene, which acts as an electron donor, and the photochemical iron–nitrite reduction. To the best of our knowledge, the present study reports the first photochemical nitrite reduction in nonheme iron models.</P></▼2>
Seungwoo Hong,Inseok Park,Jeongwon Sohn,Yeongseop Park,Kangyoon Lee,Myoungho Sunwoo 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
With the increasing demand for fuel efficient vehicles, an electric power generation strategy is required in order to generate electric energy efficiently in conventional internal combustion engine (ICE) vehicles. The electric power generation strategy is available with a voltage controlled alternator, and it determines the amount of the generated electric energy. In this paper, the power generation strategy for ICE vehicles is proposed with the model predictive control (MPC) method in order to improve fuel efficiency of vehicles. The proposed MPC based approach is composed of two parts: prediction of battery states and optimization of the electric power generation. In the first part, the battery state of charge (SOC) is predicted with the powertrain model. Based on this predicted information, the optimal trajectory of the alternator command input is obtained by using the quadratic programming (QP) optimization method. The proposed algorithm is validated through simulation and compared with other conventional strategies used in commercial software. It is proven that the MPC based electric power generation strategy can improve the fuel efficiency.
Achieving One-Electron Oxidation of a Mononuclear Nonheme Iron(V)-Imido Complex
Hong, Seungwoo,Lu, Xiaoyan,Lee, Yong-Min,Seo, Mi Sook,Ohta, Takehiro,Ogura, Takashi,Clé,mancey, Martin,Maldivi, Pascale,Latour, Jean-Marc,Sarangi, Ritimukta,Nam, Wonwoo American Chemical Society 2017 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.139 No.41
<P>A mononuclear nonheme iron(V)-imido complex bearing a tetraamido macrocyclic ligand (TAML), [Fe<SUP>V</SUP>(NTs)(TAML)]<SUP>−</SUP> (<B>1</B>), was oxidized by one-electron oxidants, affording formation of an iron(V)-imido TAML cation radical species, [Fe<SUP>V</SUP>(NTs)(TAML<SUP>+•</SUP>)] (<B>2</B>); <B>2</B> is a diamagnetic (<I>S</I> = 0) complex, resulting from the antiferromagnetic coupling of the low-spin iron(V) ion (<I>S</I> = 1/2) with the one-electron oxidized ligand (TAML<SUP>+•</SUP>). <B>2</B> is a competent oxidant in C–H bond functionalization and nitrene transfer reaction, showing that the reactivity of <B>2</B> is greater than that of <B>1</B>.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2017/jacsat.2017.139.issue-41/jacs.7b08161/production/images/medium/ja-2017-081612_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja7b08161'>ACS Electronic Supporting Info</A></P>