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Nguyen, Manh-Cuong,Nguyen, An Hoang Thuy,Ji, Hyungmin,Cheon, Jonggyu,Kim, Jin-Hyun,Yu, Kyoung-Moon,Cho, Seong-Yong,Kim, Sang-Woo,Choi, Rino Institute of Electrical and Electronics Engineers 2018 IEEE transactions on electron devices Vol. No.
<P>A novel single-pulse charge pumping (SPCP) method was proposed and implemented to profile the density of states (DOSs) in metal–oxide–semiconductor thin-film transistors (TFTs). The proposed SPCP method was demonstrated in characterizing the DOS below the conduction band of indium gallium zinc oxide TFTs. The DOSs, including oxygen vacancy donorlike states and band tail states, were characterized successfully with high resolution. This method has all the advantages of the conventional CP method and single-pulse characterization.</P>
Corporate Capital Structure Adjustments: Evidence from Vietnam Stock Exchange Market
Cuong Thanh NGUYEN,Cuong Manh BUI,Tuan Dinh PHAM 한국유통과학회 2019 The Journal of Asian Finance, Economics and Busine Vol.6 No.3
Building a target capital structure is one of the most important decisions in corporate financial management. The purpose of this article is to identify the determinants of capital structure and adjustment mechanism toward the target leverage. The partial adjustment model was applied on a sample of 306 non-financial companies listed on Vietnam stock exchange market during the period of 2008-2017. By the fixed effect model estimation method, the research results have discovered the factors of growth opportunities, firm size, tangible fixed assets and firm’s unique characteristics have a positive effect on the target capital structure of enterprises. Besides, profitability and dividend payment have a negative effect on the target capital structure of enterprises. Accordingly, the research results show that the average adjustment speed toward target leverage of the firms is 90.03%. Research results also demonstrate firms have higher or lower debt ratio than the target debt ratio, capital surplus or capital deficit also have an impact on the adjustment rate toward the target capital structure. The research results are consistent with the Dynamic Trade-off Theory. From this result, this article has provided policy implications for non-financial companies listed on Vietnam’s stock market in building a reasonable target capital structure according to operating timeline to maximize enterprise value.
Synthesis and Anti-osteoporosis Potential of Two New Indirubin-3`-oxime Derivatives
( Nguyen Manh Cuong ),( Bui Huu Tai ),( Dang Hoang Hoan ),( Pham Quoc Long ),( Eun Mi Choi ),( Young Ho Kim ) 한국응용생명화학회 2010 Applied Biological Chemistry (Appl Biol Chem) Vol.53 No.1
Two new indirubin-3`-oxime derivatives, indirubin-3`-[O-(3-bromoprop-1-yl)-oxime] (2) and indirubin-3`-[O-(methoxycarbonylmethyl)-oxime] (3) were synthesized. Their structures were confirmed by ESI-MS and NMR spectroscopic method. Both of them (5 μg/mL) significantly caused a elevation of cell growth, alkaline phosphate activity, and mineralization in osteoblastic MC3T3-E1 cells (p<0.05).
Manh-Cuong Nguyen,An Hoang-Thuy Nguyen,Hyungmin Ji,Sujin Choi,Jonggyu Cheon,Kyoung-Moon Yu,Seong-Yong Cho,Jin-Hyun Kim,Sang-Woo Kim,Rino Choi 한국물리학회 2018 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.73 No.5
The trap energy profile of top gate In-Ga-Zn-O (IGZO) thin film transistors was extracted suc- cessfully using a transmission line model incorporating the conductance method. By implementing the transmission line model method into the conventional conductance method, we were able to evaluate the contact resistance and the channel length modulation precisely and to decouple them to obtain the intrinsic channel conductance. The observed conductance over the angular frequency was almost perfectly symmetrical, which is observed only in the ideal conductance method. Finally, a shallow trap profile, including the trap density and time constant near the conduction band edge of IGZO, was extracted successfully.
Nguyen, Manh-Cuong,On, Nuri,Ji, Hyungmin,Nguyen, An Hoang-Thuy,Choi, Sujin,Cheon, Jonggyu,Yu, Kyoung-Moon,Cho, Seong-Yong,Kim, JinHyun,Kim, Sangwoo,Jeong, Jaekyeong,Choi, Rino Institute of Electrical and Electronics Engineers 2018 IEEE transactions on electron devices Vol.65 No.6
<P>The self-heating effect (SHE) in top-gate In–Ga–Zn–O (IGZO) thin-film transistors (TFTs) was examined systematically using short electrical pulse measurement methods. The temperature dependence of the pulse measurements of IGZO TFTs revealed a significant increase in temperature during the measurements, suggesting that conventional measurements can overestimate the device performance significantly. The effective temperature was introduced and extracted for IGZO TFTs at various heating powers and ambient temperatures. The short sampling time was determined to be a key in characterizing the intrinsic device properties that are not influenced by the SHE. The cooling behavior after self-heating was also examined using multipulse measurements. Because heating and cooling are significant even in a very short time, it is essential to consider the operation condition of the devices when characterizing TFTs to estimate the precise performance and reliability in a real operation.</P>
Inhibitory effects of indirubin derivatives on the growth of HL-60 leukemia cells.
Cuong, Nguyen Manh,Tai, Bui Huu,Hoan, Dang Hoang,Huong, Tran Thu,Kim, Young Ho,Hyun, Jae-Hee,Kang, Hee-Kyoung Natural Product Communications 2010 Natural product communications Vol.5 No.1
<P>Six indirubin derivatives have been synthesized and their inhibitory effects on the growth of HL-60 human promyelocytic leukemia cells investigated. Cell viability was determined using the trypan blue exclusion method. Indirubin-3'-oxime (I-1) inhibited the growth of HL-60 cells with a GI50 value of 36.6 microM, whereas I-0, I-2, I-3, I-4 and I-6 showed only weak cytotoxic activities against HL-60 cancer cells with GI50 values in the range of 97.3 to over 100 microM. These results indicate that indirubin derivatives might be useful candidate agents for exploring potential antileukemic drugs.</P>
Field and Laboratory Investigation of Cold In-Place Recycling in Vietnam
Manh Tuan Nguyen,Ba Khanh Le,Manh Cuong Nguyen 한국도로학회 2018 한국도로학회 학술대회 발표논문 초록집 Vol.2018 No.05
In Vietnam, reclaimed asphalt pavement technology is considered as the key to reduce the cost of pavement construction, and decrease the industrial waste from flexible pavement rehabilitation. Ministry of Transportation has concentrated to develop RAP technology since 2008. As a result, there are three trademark of recycling technologies applied in Vietnam such as Wirtgen (Germany), Hall Brothers (U.S.), and Sakai (Japan). This paper is focused on asphalt pavement investigation of field and laboratory tests from Cold In-place recycling technology. The laboratory tests carried out on the material were conventional tests including Marshall stability, indirect tensile strength... Field data was collected using a Benkelman beam and core specimens for indirect tensile strength test.