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TRANSCENDENT VALUES OF UNIVERSAL HUMAN RIGHTS
( Nghia Van Hoang ) 고려대학교 법학연구원 2015 Korea University Law Review Vol.18 No.-
What are universal human rights? Why has the universality of human rights been challenged by all forms of particularity and relativism, especially cultural relativism and Asian values for over the last twenty years? Do non-Western cultures, such as Oriental, Latin American and African ones, accept or reject universal human rights enshrined in the Universal Declaration of Human Rights? Those questions need to be addressed thoroughly from both theoretical and practical perspectives. Thus, the ultimate goal of this paper is to explore the sustainable and solid values of universal human rights in the UDHR as not only a highest aspiration, but also a common heritage of their cultures, religions, and traditions of thoughts. By utilizing literature review, legal and comparative methods, the paper points out that as a global language of our world of diverse cultures and ideologies, the universal human rights are the foundation of peace, security, tolerance, and human development. At the same time, the paper urges that all forms of claiming the so-called cultural relativism, such as Asian-values model, could undermine and challenge the legitimacy of universal human rights in non-Western societies including Asian nations. The paper is to revisit the appreciation of universal human rights embraced from the human beings’ transcendent values, such as dignity, tolerance, humanity, and freedoms that are embedded in all cultures.
Bending analysis of a single leaf flexure using higher-order beam theory
Nghia Huu Nguyen,이동연 국제구조공학회 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.53 No.4
We apply higher-order beam theory to analyze the deflections and stresses of a cantileveredsingle leaf flexure in bending. Our equations include shear deformation and the warping effect in bending. The results are compared with Euler-Bernoulli and Timoshenko beam theory, and are verified by finiteelement analysis (FEA). The results show that the higher-order beam theory is in a good agreement with theFEA results, with errors of less than 10%. These results indicate that the analysis of the deflections andstresses of a single leaf flexure should consider the shear and warping effects in bending to ensure highprecision mechanism design.
Nghia, Nguyen Van,Oh, Jihun,Jung, Jaehoon,Lee, Min Hyung American Chemical Society 2017 Organometallics Vol.36 No.14
<P>Heteroleptic tris-cyclometalated Ir(III) complexes bearing an <I>o</I>-carborane at the 4- or 5-position in the phenyl ring of the ppy ligand (<I>closo</I>-<B>1</B> and -<B>2</B>) were prepared and characterized. The X-ray crystal structure of <I>closo</I>-<B>1</B> reveals the <I>fac</I> arrangement of the three C<SUP>∧</SUP>N chelates around the Ir atom. Treatment of <I>closo</I> complexes with fluoride anions led to selective deboronation of the <I>closo</I>-carborane cage, producing the corresponding <I>nido</I>-carborane-substituted complexes (<I>nido</I>-<B>1</B> and <B>-2</B>). Whereas <I>closo</I>-<B>1</B> and -<B>2</B> were almost nonemissive in THF, <I>nido</I>-<B>1</B> and -<B>2</B> were highly phosphorescent (Φ<SUB>PL</SUB> = 0.94–0.95). Theoretical studies suggested that, while the emission quenching in <I>closo</I>-<B>1</B> can be ascribed to the substantial involvement of <I>o</I>-carborane in the <SUP>3</SUP>MLCT excited state, the intraligand charge transfer (<SUP>3</SUP>ILCT) state from the <I>nido</I>-carborane to pyridyl moieties is responsible for the efficient phosphorescence in <I>nido</I>-<B>1</B>. The addition of fluoride to the buffered THF/H<SUB>2</SUB>O solution (1/1, v/v, pH 7) of <I>closo</I>-<B>1</B> and -<B>2</B> under mild heating led to strong emission intensity, allowing the turn-on phosphorescence detection of fluoride in aqueous medium at the ppb level.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/orgnd7/2017/orgnd7.2017.36.issue-14/acs.organomet.7b00139/production/images/medium/om-2017-00139w_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/om7b00139'>ACS Electronic Supporting Info</A></P>
Nghia, Nguyen Van,Oh, Jihun,Sujith, Surendran,Jung, Jaehoon,Lee, Min Hyung The Royal Society of Chemistry 2018 Dalton Transactions Vol.47 No.48
<P>A family of <I>closo</I>-carborane-appended luminophores (<I>closo</I>-OXD1-2 and <I>closo</I>-DPS1-2) in which 2-R-<I>o</I>-carboranes (R = H, Me) are attached to the diphenyl-1,3,4-oxadiazole (OXD) or diphenyl-sulfone (DPS) acceptor groups were prepared and characterized. Deboronation of the <I>closo</I>-carborane cage produced the corresponding <I>nido</I>-carboranyl luminophores (<I>nido</I>-OXD1-2 and <I>nido</I>-DPS1-2). Whereas the <I>closo</I>-compounds were poorly emissive in THF (<I>Φ</I>PL < 0.01), the <I>nido</I>-luminophores exhibited an intense fluorescence with good quantum yields (<I>Φ</I>PL = 0.1-0.45). Electrochemical studies showed that while the <I>closo</I>-OXD and -DPS compounds displayed only carborane-centred, quasi-reversible reduction, the <I>nido</I>-compounds exhibited the typical features for <I>nido</I>-carborane-centred, irreversible oxidation and acceptor-centred, reversible reduction. Theoretical studies suggested that while the <SUP>1</SUP>ππ* state of <I>closo</I>-compounds is nonemissive due to the contribution of <I>closo</I>-carborane to the LUMO in the S1 excited state, the intramolecular charge transfer (ICT) state from the <I>nido</I>-carborane to acceptor moieties in <I>nido</I>-compounds leads to an efficient fluorescence. Finally, THF solutions of <I>closo</I>-OXD1 and -DPS1 showed strong fluorescence upon the addition of fluoride anions under mild heating, but were intact to other anions, including cyanide, allowing the selective OFF-ON fluorescence sensing of fluoride.</P>
Warping stresses of a rectangular single leaf flexure under torsion
Nghia Huu Nguyen,Ji-Soo Kim,이동연 국제구조공학회 2016 Structural Engineering and Mechanics, An Int'l Jou Vol.59 No.3
We describe a stress analysis of a single leaf flexure under torsion in which the warping effect is considered. The theoretical equations for the warping normal stress (xx) and shear stresses (xz and xy) are derived by applying the warping function of a rectangular cross-sectional beam and the twist angle equation that includes the warping torsion. The results are compared with those of the non-warping case and are verified using finite element analysis (FEA). A sensitivity analysis over the length, width, and thickness is performed and verified via FEA. The results show that the errors between the theory of warping stress results and the FEA results are lower than 4%. This indicates that the proposed theoretical stress analysis with warping is accurate in the torsion analysis of a single leaf flexure.