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Chuong, Tran-Van,Kim, Hyun-Soon,Park, Ji-Young,Joung, Jae-Youl,Youm, Jung-Won,Jeon, Jae-Heung The Plant Resources Society of Korea 2001 Plant Resources Vol.4 No.3
We tried to introduce two forsythia genes related in lignan biosynthesis, dirigent protein and pinoresinol/lariciresinol (Ph) reductase, into potatoes for accumulation of lignans in transgenic potatoes. We made binary vectors overexpressing dirigent protein gene and P/L reductase gene driven by a CaMV35S promoter and transformed into potatoes via Agrobacterium mediated transformation. And in order to control the metabolic flux of lignan biosynthesis pathway, we tried to inhibit chalcone synthase genes of potatoes by antisense inhibition technique also. We tried to use PCR screening method for selection of transgenic plants of different vectors. We tried to determine and compare lignan contents from different transgenic potato lines.
Distributed learning in a multi-agent potential game
Chuong Van Nguyen,Phuong Huu Hoang,Hong-Kyong Kim,Hyo-Sung Ahn 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10
In a non-cooperative dynamic game, each player participating in a changing environment aims to optimize its actions selfishly. In this paper, we focus our analysis on a class of games, namely dynamic potential game in multiagent systems. The problems of the game with constraints and without constraints are both considered; in both cases, we propose algorithms to learn the Nash equilibrium (NE) in a distributed fashion. The idea of NE learning is relied on two-time-scale dynamics and convex optimization. A numerical example is presented to verify the effectiveness of the proposed methods.
Violence and Poor Working Conditions Faced by Entertainment Workers in Cambodia
Chuong POR 이화여자대학교 아시아여성학센터 2017 이화여자대학교 아시아여성학센터 학술대회자료집 Vol.2017 No.01
Cambodia has developed booming textile, garment, tourism, and entertainment service industries since the mid-1990s. The 2007 global financial crisis pushed many garment workers, who lost their jobs, into the entertainment sector. Entertainment workers are typically engaged informally by their employers and are subjected to long working hours, violence, and sexual harassment. Many who sell beverages are forced into excessive alcohol consumption as part of their work. Many are also expected by their employers and clients to provide sexual services. To address unsafe and unhealthy working conditions for these workers, an innovative occupational safety and health regulations were adopted in 2014. This first-of-its-kind occupational safety and health regulation was developed jointly by the Cambodian Ministry of Labour and Vocational Training and employers and workers’ organizations in the entertainment sector. The implementation of this regulation can be a viable contribution to occupational safety and health to HIV interventions for these workers.
Approximate solutions of multiobjective optimization problems
Chuong, T. D.,Kim, D. S. Springer Science + Business Media 2016 Positivity Vol.20 No.1
<P>This paper provides some new results on approximate Pareto solutions of a multiobjective optimization problem involving nonsmooth functions. We establish Fritz-John type necessary conditions and sufficient conditions for approximate Pareto solutions of such a problem. As a consequence, we obtain Fritz-John type necessary conditions for (weakly) Pareto solutions of the considered problem by exploiting the corresponding results of the approximate Pareto solutions. In addition, we state a dual problem formulated in an approximate form to the reference problem and explore duality relations between them.</P>
Chuong, Nguyen Dinh,Thanh, Tran Duy,Kim, Nam Hoon,Lee, Joong Hee American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.29
<P>In this study, a facile approach has been successfully applied to synthesize a hierarchical three-dimensional architecture of ultrasmall hematite nanoparticles homogeneously encapsulated in MoS<SUB>2</SUB>/nitrogen-doped graphene nanosheets, as a novel non-Pt cathodic catalyst for oxygen reduction reaction in fuel cell applications. The intrinsic topological characteristics along with unique physicochemical properties allowed this catalyst to facilitate oxygen adsorption and sped up the reduction kinetics through fast heterogeneous decomposition of oxygen to final products. As a result, the catalyst exhibited outstanding catalytic performance with a high electron-transfer number of 3.91-3.96, which was comparable to that of the Pt/C product. Furthermore, its working stability with a retention of 96.1% after 30 000 s and excellent alcohol tolerance were found to be significantly better than those for the Pt/C product. This hybrid can be considered as a highly potential non-Pt catalyst for practical oxygen reduction reaction application in requirement of low cost, facile production, high catalytic behavior, and excellent stability.</P> [FIG OMISSION]</BR>
A class of nonsmooth fractional multiobjective optimization problems
Chuong, T. D.,Kim, D. S. Springer Science + Business Media 2016 Annals of operations research Vol.244 No.2
<P>This paper focuses on the study of optimality conditions and duality in nonsmooth fractional multiobjective optimization problems. Applying some advanced tools of variational analysis and generalized differentiation, we establish necessary optimality conditions for (weakly) efficient solutions of a fractional multiobjective optimization problem involving inequality and equality constraints. Sufficient optimality conditions for such solutions to the considered problem are also obtained by means of (strictly) generalized convex-affine functions. In addition, we address a dual problem to the primal one and examine duality relations between them.</P>