On the Reliability of the AMBER Force Field and its Empirical Dispersion Contribution for the Description of Noncovalent Complexes

Kolá,ř,, Michal,Berka, Karel,Jureč,ka, Petr,Hobza, Pavel WILEY-VCH Verlag 2010 CHEMPHYSCHEM -WEINHEIM- Vol.11 No.11

<P>The reliability of the AMBER force field is tested by comparing the total interaction energy and dispersion energy with the reference data obtained at the density functional theory–symmetry-adapted perturbation treatment (DFT–SAPT)/aug-cc-pVDZ level. The comparison is made for 194 different geometries of noncovalent complexes (H-bonded, stacked, mixed, and dispersion-bound), at the equilibrium distances as well as at longer distances (up to a relative distance of two). The total interaction energies agree very well with the reference data and only the strength of H-bonded complexes is slightly underestimated. In the case of dispersion energy, the overall agreement is even better, with the exception of the stacked aromatic systems, where the empirical dispersion energy is overestimated. The use of AMBER interaction energy and AMBER dispersion energy for different types of noncovalent complexes at equilibrium as well as at longer distances is thus justified, except for a few cases, such as the water molecule, where the dispersion energy is highly inaccurate.</P> <B>Graphic Abstract</B> <P>The reliability of the AMBER force field is tested by comparing the total interaction energy and dispersion energy with the ab initio reference data. The comparison is made for 194 different geometries of noncovalent complexes with various binding motifs (see picture), at the equilibrium distances as well as at longer distances. Despite the oversimplified form of the empirical force field a surprisingly good agreement is observed, with some exceptions. <img src='wiley_img_2010/14394235-2010-11-11-CPHC201000109-content.gif' alt='wiley_img_2010/14394235-2010-11-11-CPHC201000109-content'> </P>

Non-linear analysis of side-plated RC beams considering longitudinal and transversal interlayer slips

Jerneja Kolšek,Tomaž Hozjan,Aleš Kroflič,Igor Planinc,Miran Saje 국제구조공학회 2014 Steel and Composite Structures, An International J Vol.16 No.6

A new mathematical model and its finite element formulation for the non-linear stress-strain analysis of a planar beam strengthened with plates bolted or adhesively bonded to its lateral sides is presented. The connection between the layers is considered to be flexible in both the longitudinal and the transversal direction. The following assumptions are also adopted in the model: for each layer (i.e., the beam and the side plates) the geometrically linear and materially non-linear Bernoulli's beam theory is assumed, all of the layers are made of different homogeneous non-linear materials, the debonding of the beam from the side-plates due to, for example, a local buckling of the side plate, is prevented. The suitability of the theory is verified by the comparison of the present numerical results with experimental and numerical results from literature. The mechanical response arising from the theoretical model and its numerical formulation has been found realistic and the numerical model has been proven to be reliable and computationally effective. Finally, the present formulation is employed in the analysis of the effects of two different realizations of strengthening of a characteristic simply supported flexural beam (plates on the sides of the beam versus the tension-face plates). The analysis reveals that side plates efficiently enhance the bearing capacity of the flexural beam and can, in some cases, outperform the tensile-face plates in a lower loss of ductility, especially, if the connection between the beam and the side plates is sufficiently stiff.

Effect of creep on behaviour of steel structural assemblies in fires

Peter Češarek,Miha Kramar,Jerneja Kolšek 국제구조공학회 2018 Steel and Composite Structures, An International J Vol.29 No.4

There are presently two general ways of accounting for hazardous metal creep in structural fire analyses: either we incorporate creep strains implicitly in hardening model ('explicit-creep' plasticity) or we account for creep explicitly ('explicit-creep' plasticity). The first approach is simpler and usually used for fast engineering applications, e.g., following proposals of EN 1993-1-2. Prioritizing this approach without consideration of its limitations, however, may lead to significant error. So far the possible levels of such error have been demonstrated by few researchers for individual structural elements (i.e., beams and columns). This paper, however, presents analyses also for selected beam-girder assemblies. Special numerical models are developed correspondingly and they are validated and verified. Their important novelty is that they do not only account for creep in individual members but also for creep in between-member connections. The paper finally shows that outside the declared applicability limits of the implicit-creep plasticity models, the failure times predicted by the applied alternative explicit-creep models can be as much as 40% shorter. Within the limits, however, the discrepancies might be negligible for majority of cases with the exception of about 20% discrepancies found in one analysed example.

Design of a Retargetable Decompiler for a Static Platform-Independent Malware Analysis

Lukáš Ďurfina,Jakub Křoustek,Petr Zemek,Dušan Kolář,Tomáš Hruška,Karel Masařík,Alexander Meduna 보안공학연구지원센터(IJSIA) 2011 International Journal of Security and Its Applicat Vol.5 No.4

TRANSPARENCY INTERNATIONAL : Cambodia ; 2013 International Conference on “Strengthening Anti-Corruption Competitiveness through a New Governance Paradigm”

( Kol Preap ) 한국행정학회 2013 한국행정학회 학술발표논문집 Vol.2013 No.-

1930년대 대중잡지를 통해 본 식민지 조선의 "대중": 잡지『조광』을 중심으로

강영걸 ( Young Kol Kang ),정혜영 ( Hye Young Jung ) 국제비교한국학회 2012 비교한국학 Comparative Korean Studies Vol.20 No.3

1930년대 대중잡지 『조광』을 중점적으로 분석하여 식민지 조선 ``대중``의 의미를 탐구한 본 연구는 다음과 같은 문제에 대한 답을 얻고자 하였다. 첫째, 1930년대 조선사회에 ``대중문화``가 성립되어 있었는가? 둘째, 만일 성립되어 있었다면, 그 ``대중``이 식민지시기 마지막 무렵``대중동원``의 큰 물결 속에서 어떤 운명을 겪었는가에 관한 것이다. 이러한 의문과 관련해서 이 연구는 다음과 같은 사실을 시사하고 있다. 첫째, 대중문화 또는 대중매체가 발전하고 발달하면 ``대중``이라고 부를 수 있는 새로운 집단이 등장하고, 그들의 취향과 욕구를 충족시키기 위한 새로운 형태의 문화가 발생하는데 식민지 조선은 그런 과정을 거치지 않았다. 예를 들면, 1920년대의 조선에서 대중의 성립과 대중문예의 탄생은 그 순서가 뒤바뀌어 있었던 것이다. 대중매체의 형성은 물론 그 매체를 활용할 만한 제반 여건조차 확보되지 않았던 식민지 조선의 상황을 고려할 때 대량소비를 목표로 한 ``상업주의적`` 잡지의 등장은 상당히 부자연스럽다고 할 수밖에 없다. 그렇다면 이들 잡지는 발간자 측의 특정한 ``목적``을 위해서 등장했다고 보아야 하는 것이다. 둘째, ``대중``이 식민지 시기 마지막 무렵 ``대중동원``의 큰 물결 속에서 어떤 운명을 겪었는가와 관련하여, 이 연구가 집중 조명한 잡지 『조광』은 식민지 조선에서 대중문화가 형성될 수 있다는 믿음은 환상이라는 것을 극명하게 알려주고 있다. 근대적 의미의 ``대중``이 존립하지 않은 식민지 조선에서, 대중잡지란 본질적으로 성립될 수가 없었던 것이다. 특히, 끊임없이 제국의 국민 만들기 작업이 진행되던 식민지 사회에서 ``대중``이란 형성되는 순간 곧바로 제국의 신민 혹은 국민으로 포섭될 수밖에 없었다. 그것이 바로 식민지 대중의 운명이었으며 식민지 종합대중잡지의 필연적 귀착점이었다. This study deals with the meaning of the masses in the 1930s in Colonial Chosun with a focus on the popular magazines Cho Kwang. To serve the purpose of this study, we conducted a literature review on this issue to answer such questions as: 1) Did there exist the so-called ``the masses`` in the 1930s in the colonial Chosun? 2) If the masses existed, what was its fate in the midst of the Empire`s effort to mobilize the Koreas in the middle of waging a series of war in the 1930s? With regard to these questions, this study implies that: 1) There were no masses from the perspective of the mass society. Hence, it would not be maintained that there did exist the mass culture in the colonial Chosun in the 1930s. 2) Since masses did exist at that time, it must be an illusion to maintain that the mass culture and the mass society had been established in the colonial era. The reality seems to be that the mass, which must has been a fictitious concept, was mobilized to serve the purpose of Japanese Empire to wage a series of wars such as Sino-Japanese War and the Second World War.

The Culturalist Perspective on the Japanese Management System

Kang, Young-Kol 大邱大學校 社會科學硏究所 1999 社會科學硏究 Vol.7 No.2

There are two approaches in interpreting the rise of the Japanese management system. One is the culturalist approach and the other is the convergence approach. This paper discusses how Japanese culture has been interwoven with the Japanese management system and argues that, since the culturalists have misunderstood the real nature of Japanese culture. some of the important characteristics attributable to the rise of the Japanese management system are, in most cases, the features that East Asian cultures share in common. In order to grasp the clear picture of Japanese culture, the culturalists should rather have raised such a question: "why could Japanese have been industrialized ahead of Korea and China, which had been using the same Chinese characters, having similar religions like Confucianism. Buddhism, and Taoism, and speaking similar branches of languages?" As the uniqueness of Japanese culture could be found in their dichotomous perception of'uchi" and "otaku”, its adaptability to the changing environment, and an emblem culture, the Japanese management system may be associated with those three distinctive aspects of Japanese culture rather than those features which the westerners regarded as "Japanese."

Leadership Succession and Organizational Performance

Kang, Young-Kol 대구대학교 사회과학연구소 2000 社會科學硏究 Vol.8 No.2

This study, employing data for 8 college American football teams in the Big 8 Conference, shows that leadership successions impact organizational performance when successors' competence is included in the analysis and concludes that effective leadership can overcome organizational differences inherent to each organization and make a difference to organizational performance.

CEO 교체와 경영성과: 한미간 비교 연구

강영걸 ( Young Kol Kang ) 국제비교한국학회 2004 비교한국학 Comparative Korean Studies Vol.12 No.1

Three Theoretical Approaches to the Rise of Chaebol(財閥) Organization in Korea and their Critical Evaluations

Kang, Young-Kol 大邱大學校 社會科學硏究所 1995 社會科學硏究 Vol.2 No.1

西歐의 조직들과는 매우 다른 문화적, 경제적 풍토 하에서 발달해 온 한국의 재별은 西歐의 조직이론(organization theory)이 설명하기 힘든 매우 흥미 있는 사례를 보여 준다고 할 수 있다. 한국 재벌의 경우가 흥미 있는 것은 한국이 소위 극소수의 재벌에 의존하여 경제발전을 해 온 "독점 자본주의(monopoly capitalism)" 시스템 하에서 경제발전을 이루어 왔기 때문이다. 西歐의 (新古典)경제학 이론에 따르면 독점 자본주의는 국가 경제발전에 이롭지 않다고 하는데, 한국은 독점 자본주의 하에서 경제가 도리어 크게 발전한 특이한 예를 보여 주고 있는 것이다. 따라서 한국의 경우는 경제조직은 물론 경제발전에 관한 酉歐의 이론이 크게 수정되어아 할지도 모른다는 사실을 시사해 준다고 할 수 있다. 재벌이 한국 경제에서 차지하는 중요성 때문에 많은 학자들이 재벌 조직에 관심을 가지고 연구를 해 왔지만, 조직이론의 입장에서 접근하여 그 기원을 규명해 보려는 시도는 별로 없었다. 이 연구는 재벌의 생성과 관련된 여러 가지 西歐의 조직이론을 세가지로 분류하여 토의, 비판함으로써, 서구의 조직이론이 한국적 상황에서는 어떻게 적용될 수 있는가를 규명해 보았다.