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김상주(Sangjoo Kim),김헌영(Heongyoung Kim),김정민(Jungmin Kim),김병민(Byungmin Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
This study present the development of an automotive steering wheel using the finite element method. That reduces the number of test repeating times and gives an information about stiffness. During frontal crash of a vehicle, a major part of the driver's kinetic energy is absorbed by the steering wheel and column system. The deformation characteristics of the steering wheel has significant effects on the injury of the driver. The steering wheel is the most common source of serious injury for drivers involved in frontal crashes. Modal analysis, strength analysis and impact analysis in steering wheel were performed to certify requirements of safety regulations. A simulation model of steering wheel and column strength simulation are established using a PAM-CRASH and ABAQUS.
An Efficient Feature Extraction Method for Facial Images based on Integral Histogram
Byungmin Kim,Sangheon Lee,Myoungkyu Sohn,Jangwoo Lee 한국멀티미디어학회 2011 한국멀티미디어학회 국제학술대회 Vol.2011 No.-
Feature descriptors based in Local Binary Patterns (LBP) are widely used for face recognition and other texture analysis areas because of their simplicity of computation and robustness with respect to illumination. We propose a novel method that dramatically reduces the computation time of LBP feature vectors using an integral histogram. The proposed method can compute a feature vector in constant time by pre-calculating the integral histogram of the entire image area. Moreover, with this method the computation time for feature vectors of different areas and shapes of local regions is the same. In our experiments, we verified that LBP-based face detection speed is greatly improved by applying our approach to LBP face descriptors. In this paper, we present the proposed methods and the application of our approach to face detection; we also discuss our experimental results.
An improved method for predicting interactions between virus and human proteins
Kim, Byungmin,Alguwaizani, Saud,Zhou, Xiang,Huang, De-Shuang,Park, Byunkyu,Han, Kyungsook Imperial College Press 2017 JOURNAL OF BIOINFORMATICS AND COMPUTATIONAL BIOLOG Vol.15 No.1
<P>The interaction of virus proteins with host proteins plays a key role in viral infection and consequent pathogenesis. Many computational methods have been proposed to predict protein-protein interactions (PPIs), but most of the computational methods are intended for PPIs within a species rather than PPIs across different species such as virus-host PPIs. We developed a method that represents key features of virus and human proteins of variable length into a feature vector of fixed length. The key features include the relative frequency of amino acid triplets (RFAT), the frequency difference of amino acid triplets (FDAT) between virus and host proteins, and amino acid composition (AC). We constructed several support vector machine (SVM) models to evaluate our method and to compare our method with others on PPIs between human and two types of viruses: human papillomaviruses (HPV) and hepatitis C virus (HCV). Comparison of our method to others with same datasets of HPV-human PPIs and HCV-human PPIs showed that the performance of our method is significantly higher than others in all performance measures. Using the SVM model with gene ontology (GO) annotations of proteins, we predicted new HPV-human PPIs. We believe our approach will be useful in predicting heterogeneous PPIs.</P>
Byungmin Sohn,Bong-Ju Kim,Jun Woo Choi,Seo Hyoung Chang,Jung Hoon Han,Changyoung Kim 한국물리학회 2020 Current Applied Physics Vol.20 No.1
A controversy arose over the interpretation of the recently observed hump features in Hall resistivity ρxy from ultra-thin SrRuO3 (SRO) film; it was initially interpreted to be due to topological Hall effect but was later proposed to be from existence of regions with different anomalous Hall effect (AHE). In order to settle down the issue, we performed Hall effect as well as magneto-optic Kerr-effect measurements on 4 unit cell SRO films. Clear hump features are observed in ρxy, whereas neither hump feature nor double hysteresis loop is seen in the Kerr rotation which should be proportional to the magnetization. In addition, magnetization measurement by superconducting quantum interference device shows no sign of multiple coercive fields. These results show that inhomogeneous AHE alone cannot explain the observed hump behavior in ρxy data. We suggest that emergence of the hump structure in ρxy is closely related to the growth condition.