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Comparison of Continuous and Filter-Based Carbon Measurements at the Fresno Supersite
Park, Kihong,Chow, Judith C.,Watson, John G.,Trimble, Dana L.,Doraiswamy, Prakash,Park, Kihong,Arnott, W. Pat,Stroud, Kenneth R.,Bowers, Kenneth,Bode, Richard,Petzold, Andre,Hansen, Anthony D.A. Informa UK (TaylorFrancis) 2006 Journal of the Air & Waste Management Association Vol.56 No.4
Kihong Eom,Donald A,Gross 한국비교정부학회 2012 한국비교정부학보 Vol.16 No.1
Political parties have used hard money, soft money, and/or issue advocacy to strengthen party building. But, as soft money and issue advocacy expenditures began to explode, concerns over both the source of these monies and their continued growth helped lead to the passage of Bipartisan Campaign Reform Act of 2002. Contribution limits on party contributions, however, remained relatively unchanged under the new law. In this paper we examine what might be gained or lost if contribution limits on party contributions are changed. We examine 88 gubernatorial elections from 1995 to 2002 in 50 American states. Analyses of the total dollar amount of party contributions suggest that less restrictive party contribution limits result in political parties being more likely to contribute higher dollar amounts to candidates. This pattern is enhanced when political parties perceive that their contributions are likely to have a greater impact, i.e., in a competitive election. In addition, analyses of the candidates’ reliance on party contributions are supportive of a similar pattern; less restrictive party contribution limits result in candidates being more likely to rely on party contributions, especially when the election becomes competitive. Findings presented in this paper clearly suggest that the financial role of political parties in an election can be enhanced or diminished by making adjustments in the level of political party campaign contribution limits.
Exact Calculation of the Optical Properties of One-Dimensional Nonlinear Photonic Crystals
Kihong Kim,D. K. Phung,F. Rotermund,H. Lim 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.5
We develop a new version of the invariant imbedding theory of wave propagation in arbitrarily-inhomogeneous stratified media made of nonlinear materials. Using this theory, we study electromagnetic wave propagation in one-dimensional nonlinear photonic crystals with and without a defect layer. The invariant imbedding theory allows us to calculate various wave propagation characteristics very efficiently in a numerically exact manner. We calculate the transmission spectra and the electric field distribution inside nonlinear photonic crystals. We find that the electric field inside the defect layer is strongly enhanced. We also observe strong optical bistability near the defect frequency. We develop a new version of the invariant imbedding theory of wave propagation in arbitrarily-inhomogeneous stratified media made of nonlinear materials. Using this theory, we study electromagnetic wave propagation in one-dimensional nonlinear photonic crystals with and without a defect layer. The invariant imbedding theory allows us to calculate various wave propagation characteristics very efficiently in a numerically exact manner. We calculate the transmission spectra and the electric field distribution inside nonlinear photonic crystals. We find that the electric field inside the defect layer is strongly enhanced. We also observe strong optical bistability near the defect frequency.
A Study of Dark Photon at the Electron-Positron Collider Experiments Using KISTI-5 Supercomputer
Kihong Park,Kihyeon Cho 한국우주과학회 2021 Journal of Astronomy and Space Sciences Vol.38 No.1
The universe is well known to be consists of dark energy, dark matter and the standard model (SM) particles. The dark matter dominates the density of matter in the universe. The dark matter is thought to be linked with dark photon which are hypothetical hidden sector particles similar to photons in electromagnetism but potentially proposed as force carriers. Due to the extremely small cross-section of dark matter, a large amount of data is needed to be processed. Therefore, we need to optimize the central processing unit (CPU) time. In this work, using MadGraph5 as a simulation tool kit, we examined the CPU time, and cross-section of dark matter at the electron-positron collider considering three parameters including the center of mass energy, dark photon mass, and coupling constant. The signal process pertained to a dark photon, which couples only to heavy leptons. We only dealt with the case of dark photon decaying into two muons. We used the simplified model which covers dark matter particles and dark photon particles as well as the SM particles. To compare the CPU time of simulation, one or more cores of the KISTI-5 supercomputer of Nurion Knights Landing and Skylake and a local Linux machine were used. Our results can help optimize high-energy physics software through high-performance computing and enable the users to incorporate parallel processing.
Power Efficiency Analysis According to S-MAC Attack in Wireless Sensor Networks
Kihong Kim,Jinkeun Hong 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
In this paper, we examine security vulnerability in S-MAC and analyze the power consumed at each stage of S-MAC according to vulnerability of denial of service (DoS) attack. From our analytical results, it can be induced that there is a need for a power-efficient authentication scheme which provides reliability, efficiency, and security for normal S-MAC communication. To our knowledge, this is the first comprehensive case study of possible DoS vulnerability and its power consumption in S-MAC. Our results can be used to design a power-efficient, secure communication mechanism for WSN.