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권세중,유민욱,김탁곤,Kwon, Se Jung,Yu, Minwook,Kim, Tag Gon 한국시뮬레이션학회 2017 한국시뮬레이션학회 논문지 Vol.26 No.2
High Level Architecture (HLA)는 완성된 시뮬레이터를 연동함으로써 재사용성을 높이고 분산된 이기종 시뮬레이터간의 연동성을 확보하고자 제정된 연동 표준으로, Runtime Infrastructure (RTI)로 구현되어 다양한 시뮬레이터간의 연동 시뮬레이션을 중개한다. 이러한 연동 시뮬레이션 관련 연구는 연동 대상이 되는 시스템이 점점 복잡해짐에 따라 시뮬레이터간의 연동을 넘어 연동된 페더레이션 간의 연동으로 발전하고 있다. 그러나 기존의 연구들은 객체 모델 통합에 대한 고민이 없었기 때문에 객체 모델이 동일한 표준 형식을 따르며 차이점이 존재하지 않아 쉽게 통합될 수 있다고 가정하고 진행되었다. 그러나 다양한 HLA 표준에 기초한 페더레이션들이 이미 구현되어 있기 때문에 객체 모델의 형식에 차이점이 있어 기계적인 객체 모델 통합이 불가능하고, 실제로는 같은 객체/속성에 대해 다르게 기술되어 있을 가능성이 많다. 또한 모든 객체를 통합하여 공개했을 때에는 보안성의 문제도 존재한다. 따라서 본 논문은 이러한 문제를 해결하는 페더레이션 연동을 위한 객체 모델 통합 프로세스를 제안한다. 제안하는 객체 모델 통합 프로세스는 서로 다른 표준을 따르는 객체 모델 간의 통합 방법을 제안하고, 객체간의 서로 다른 이름/특성 문제를 해결하며, 보안객체를 제외하는 기능을 담고 있다. 본 연구를 통하여 페더레이션 연동 기술이 실제적으로 적용될 때에 각 페더레이션의 연동성과 재사용성을 향상시킬 수 있을 것으로 기대한다. High Level Architecture(HLA) is a specification for interoperation among heterogeneous simulators which are executed in a distributed environment. HLA originally allows many federates to join in a federation using a single RTI(Run-Time Infrastructure). As the target systems become more complex, the need for the interoperation of federations, performed in a RTI-RTI interoperation environment, has been growing. It can be performed by the confederation interface with the agents, which subrogate the API calls and callbacks of each federation. The existing studies have assumed that the object models of each federation are based on same HLA standard and their object descriptions are equal. Because the existing federations are usually not under this assumption, this paper proposes the integration process of object models for the federation interoperation environment. To integrate the object models for the interoperation of federations, this process resolves the differences of HLA standards, provides conversion process between objects with different descriptions and excludes the security objects. We expect that this process enhances the reusability and effectiveness of interoperation of federations in various domains.
피브로인 미세구 첨가에 의한 3T3 섬유아 세포의 이동 촉진
권세창(Se Chang Kwon),전현상(Hyun Sang Jeon),류다영(Da Yeong Ryu),김지영(Ji Young Kim),허원(Won Hur) 한국생물공학회 2018 KSBB Journal Vol.33 No.1
Microsphere-stimulated cell migration was observed at the periphery of a confluent 3T3 cell culture even in the absence of serum. Under non-contact inhibition conditions, 3T3 cells showed a highest migratory velocity of 1.7 μm/min in a DMEM media with 0.05 mg/mL microspheres. It is 147% faster than those in DMEM with 10% serum and 194% faster than those in DMEM only. Monolayer colonies were formed from 3T3 cell spheroids in a microsphere-containing culture medium but not in a DMEM without serum. Western blot analysis showed that microsphere supplementation reduced the expression levels of focal adhesion kinase. Fibroin microsphere seems to stimulate a migratory signal cue other than focal adhesion kinase. Unlike to other nanoparticles, fibroin microspheres stimulated 3T3 cell migration, showing a potential candidate for wound healing stimulation.
제한 효소 EcoRl 의 활성에 관여하는 Serine 잔기 및 그 위치에 관한 연구
권세창,조영동 ( Se Chang Kwon,Young Dong Cho ) 생화학분자생물학회 1989 BMB Reports Vol.22 No.2
EcoRl endonuclease is inactivated by diisopropylfluorophosphate (DFP), a serine residue modification reagent. The rate of inactivation is reduced by the substrate DNA and Mg^(++), The DNA cleavage activity of EcoRI endonuclease in inactivated by DFP, while the binding capacity of enzyme is not inactivated. Several lines of experimental evidence indicate that serine residue plays a very important catalytic role is EcoRI endonuclease. To generate peptide maps of the active serine residue region, the enzyme was labeled with (³H)DFP and digested with trypsin. The amino acid composition of the labeled peptide corresponds to a tryptic fragment including residues 146-169 in the EcoRI endonuclease sequence.
온도에 의한 산화물 박막트랜지스터의 문턱전압 이동 시뮬레이션 방안
권세용,정태호,Kwon, Seyong,Jung, Taeho 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.3
In this paper, we propose a numerical method to model temperature dependent threshold voltage shift observed in metal oxide thin-film transistors (TFTs). The proposed model is then implemented in AIM-SPICE circuit simulation tool. The proposed method consists of modeling the well-known stretched-exponential time dependent threshold voltage shift and their temperature dependent coefficients. The outputs from AIM-SPICE tool and the stretched-exponential model at different temperatures in the literature are compared and they show a good agreement. Since metal oxide TFTs are the promising candidate for flat panel displays, the proposed method will be a good stepping stone to help enhance reliability of fast-evolving display circuits.
권세광 ( Sae Kwang Kwon ),장종범 ( Chong Bum Chang ) 대한류마티스학회 2007 대한류마티스학회지 Vol.14 No.3
The knee is a complex structure and far from being the simple hinge joint of popular belief. Knee pain would not be properly understood unless one is familiar with the anatomy and understands the role of the various structures. For patient consultation or for selecting a treatment option, it is crucial to find the central cause of symptoms and functional disabilities of the patient based on a detailed history, a focused examination and, when indicated, the selective use of appropriate imaging and laboratory studies. The history taking should be comprehensive and include the demographic characteristics, past medical history, comprehending the associated trauma, pain characteristics and quality of life. Basic physical examination should include inspection of walking pattern and the knee, evaluation of joint effusion, range of motion and the location of tenderness, and precise assessment of joint stability. Although many advanced diagnostic tools are available, plain radiographs are frequently utilized as a primary tool to evaluate conditions of the knee joint for practical and economic reasons. A weight-bearing anteroposterior radiographs should be taken for appropriate evaluation of the condition of the tibiofemoral joint, and weight-bearing radiographs in semi-flexed position is valuable to evaluate the joint space more precisely. To evaluate the patellofemoral joint, axial and lateral views should be included in the routine radiographs. In practice, physicians need to be cautious not to easily reach the conclusion that the symptoms of the knee joint can be attributed to only a few clinical findings in consulting the patients with knee pain.
그리스 국방비 지출에 대한 연구(1974-2019): 터키와의 관계를 중심으로
권세라,윤희두 서강대학교 유로메나연구소 2020 통합유럽연구 Vol.11 No.3
Greece, faced with the worst case of recession amidst the 2008 Eurozone debt crisis, was forced to pass severe austerity measures. Its military expenditure was cut in this process, since Greece had the highest military expenditure as a percentage of GDP in Europe as of 2008. Greece has been spending high amounts on defense for the past few decades, due to the exceptional circumstances due to its military hostilities with neighboring Turkey. Having transitioned into a democratic republic following the collapse of its military junta in 1974, Greece saw sharp increases in its military spending as it withdrew from the North Atlantic Treaty Organization following the invasion of Cyprus by Turkish forces and territorial water disputes in the Aegean Sea. Greece had recognized Turkey as the primary threat to its national defense after the 1995 Imia/Kardak Crisis, so it aimed to strengthen its national defense capabilities by purchasing hundreds of millions to billions of dollars’ worth of weaponry from the United States and other European nations every year. After the Eurozone crisis, Greece’s military expenditure has somewhat decreased following the European Troika’s bailout loan measures. Nevertheless, actual spending has been on the rise since 2010 due to ongoing natural gas disputes in the Eastern Mediterranean, and Greece still maintains the highest ratio of military expenditure to the GDP in Europe. Based on the aforementioned historical and military disputes that have existed between Greece and Turkey, this study aims to analyze the background and circumstances of Greece’s decades-long high military expenditures.