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Nguyen Van Hieu,Le Thi Ngoc Loan,Nguyen Duc Khoang,Nguyen Tuan Minh,Do Thanh Viet,Do Cong Minh,Tran Trung,Nguyen Duc Chien 한국물리학회 2010 Current Applied Physics Vol.10 No.2
In this paper, a very simple procedure was presented for the reproducible synthesis of large-area SnO2nanowires (NWs) on a silicon substrate by evaporating Sn powders at temperatures of 700, 750, and 800 ℃. As-obtained SnO2 NWs were characterized by field emission scanning electron microscopy (FESEM),transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman spectroscopy. They revealed that the morphology of the NWs is affected by growth temperature and the SnO2 NWs are single-crystalline tetragonal. The band gap of the NWs is in the range of 4.2–4.3 eV as determined from UV/visible absorption. The NWs show stable photoluminescence with an emission peak centered at around 620 nm at room-temperature. The sensors fabricated from the SnO2 NWs synthesized at 700 ℃ exhibited good response to LPG (liquefied petroleum gas) at an operating temperature of 400 ℃.
Hoang, Van Minh,Le, Hong Chung,Kim, Bao Giang,Duong, Minh Duc,Nguyen, Duc Hinh,Vu, Quynh Mai,Nguyen, Manh Cuong,Pham, Duc Manh,Ha, Anh Duc,Yang, Jui-Chen Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.no.sup1
Two years after implementation of the graphic health warning intervention in Vietnam, it is very important to evaluate the intervention's potential impact. The objective of this paper was to predict effects of graphic health warnings on cigarette packages, particularly in reducing cigarette demand and smoking-associated deaths in Vietnam. In this study, a discrete choice experiment (DCE) method was used to evaluate the potential impact of graphic tobacco health warnings on smoking demand. To predict the impact of GHWs on reducing premature deaths associated with smoking, we constructed different static models. We adapted the method developed by University of Toronto, Canada and found that GHWs had statistically significant impact on reducing cigarette demand (up to 10.1% through images of lung damage), resulting in an overall decrease of smoking prevalence in Vietnam. We also found that between 428,417- 646,098 premature deaths would be prevented as a result of the GHW intervention. The potential impact of the GHW labels on reducing premature smoking-associated deaths in Vietnam were shown to be stronger among lower socio-economic groups.
Computational Approach to Estimate Functional Significance of Stenotic Lesion of Coronary Artery
Duc Minh Tran(쩐득민),Minh Tuan Nguyen(웬민투안),Hyoung Gwon Choi(최형권),Hyuk-Jae Chang(장혁재),Sang-Wook Lee(이상욱) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
Computed tomographic (CT) angiography often overestimates the significance of stenotic lesion of coronary and it leads to a need for functional diagnostic measurements. Currently, invasive pressure-wire-based fractional flow reserve (FFR) is becoming the standard of reference for assessing the physiological significance of coronary stenoses in clinical decisions regarding revascularization and exhibits favorable outcomes in identifying the ischemia-causing stenosis. A noninvasive approach for FFR prediction based on computational fluid dynamics with CT angiography was developed. Since the hemodynamic conditions in distal vascular beds highly affects the coronary flow structures, it is necessary to incorporate zero-dimensional (0D) lumped parameter network (LPN) model for coronary microvascular flow by coupling with 3D CFD simulation. This demonstrated high diagnostic and prognostic accuracy with a reduction of adverse events. MPI parallel algorithm based on domain decomposition method was applied for the 3D-0D coupled model of coronary flow dynamics simulations in a monolithic approach. In this paper, we introduce the development of clinically practical computational tool to estimate physiological significance of stenotic lesion of coronary with aims of accelerating clinical outcomes, basically by bench to bedside approach.
Comparative Analysis of Container Terminals in Northern Vietnam, 2005-2014
Nguyen, Duc Minh,Kim, Sung-june Korean Institute of Navigation and Port Research 2015 한국항해항만학회지 Vol.39 No.5
Sea-ports in Northern Vietnam have experienced a rapid growth of container throughput in recent years. To accompany with such development, huge investment also has been performed to enhance not only local port capacity but also the regional logistics system. Container terminals in Northern Vietnam locate centrally along Cam river of Haiphong city, leaving 2 others in Quang Ninh province. Five out of totally 11 container terminals in the area are under the control of Vinalines - a national corporation in field of maritime industry. In this paper, those terminals are classified in terms of location and ownership. The volume of container throughput and facilities of all container terminals in Northern Vietnam from 2005 to 2014 are recorded in order to compare the performance of groups. A Data Envelopment Analysis (DEA) is then applied to evaluate the relative efficiency of such terminals. Before conclusion, number of suggestions will be contributed to related parties.
Evaluation of Logistics Infrastructure of Container Terminals in Northern Vietnam
Minh Duc Nguyen,Sung-June Kim,Jung Sik Jeong 한국항해항만학회 2016 한국항해항만학회지 Vol.40 No.5
The sea-port in Northern Vietnam accounts for around one third of the total country’s cargo throughput and for many decades has been playing an important role in the logistics system of the country. 11 container terminals currently operate in Northern Vietnam, concentrating in Haiphong city and Quang Ninh province. Despite the increasing demand, the competition among these container terminals has become increasingly more critical. In recent years, massive investments from both government and operators have been made to improve the capability of the local sea-port’s logistics infrastructure. This critically needed comprehensive research evaluates the impact of the current logistics infrastructure condition on the competitiveness of terminals and quantitatively compares the competencies of these terminals. In order to meet such requirements, the paper first summarizes the indicators of the logistics infrastructures of the sea ports before developing and testing hypotheses to reveal the correlation between the given factors and the annual throughput of container terminals in the region. Factor analysis will then be applied to score the logistics infrastructure competency of each container terminal. A significant gap between logistics infrastructures among all container terminals was not observed and the competitiveness between container terminals is mostly driven by traditional activities including cargo handling and storage. According to the results, strategic thinking will be needed to contribute to related organizations for better decisions in investment, management, and operation.
Nguyen Minh Duc,김성준 한국해운물류학회 2020 The Asian journal of shipping and Logistics Vol.36 No.1
Northern Vietnam plays an important role in Vietnam’s national economy. In recent years, the sea-port industry in the area has witnessed an impressive development and fierce competition especially among local container terminals. Under the pressure of competition, local container ports are competing through attractive handling charges. The paper applies a Bertrand-Nash game model to estimate the equilibrium handling charges and equilibrium market share of each container terminal in the area. The game can be divided into non-cooperative game and cooperative game. Under the cooperative game, three different scenarios are considered. The game results will verify the implication of price competition among local container terminals and present the outcome of each coalitional scenario for further discussion.
Nguyen Phuong Thao,Bui Thi Thuy Luyen,Nguyen Thi Thanh Ngan,Le Duc Dat,Nguyen Xuan Cuong,Nguyen Hoai Nam,Phan Van Kiem,Seok Bean Song,Chau Van Minh,김영호 대한약학회 2015 Archives of Pharmacal Research Vol.38 No.5
Peroxisome proliferator-activated receptors(PPARs) are ligand-activated transcription factors thatregulate the expression of multiple genes involved inmetabolic, anti-inflammatory, and developmental processes. This study evaluated the PPARs transactivationaleffects of thirteen cembranoid diterpenoids 1–13 from thesoft coral Lobophytum crassum, using PPAR-responsiveelements–luciferase reporter and GAL4–PPAR chimeraassays. All isolated compounds activated the transcriptionof PPARs in a dose-dependent manner, with EC50 valuesranging from 2.07 ± 1.73 to 130.20 ± 1.85 lM. Moreover,compounds 6–9 affected the transactivation of allthree PPAR types, PPARa, c, b(d), in a dose-dependentmanner, with EC50 values in a ranging from 11.92 ± 1.23to 122.50 ± 2.12 lM. These results provide a scientificrationale for further studies on the soft coral L. crassum andits diterpenoid constituents to develop medicinal productsagainst inflammatory and metabolic diseases.
Duc, Nguyen Minh,Du, Yang,Thorsen, Thor S.,Lee, Su Youn,Zhang, Cheng,Kato, Hideaki,Kobilka, Brian K.,Chung, Ka Young Springer New York LLC 2015 Journal of the American Society for Mass Spectrome Vol.26 No.5
<P>G protein-coupled receptors (GPCRs) have important roles in physiology and pathology, and 40% of drugs currently on the market target GPCRs for the treatment of various diseases. Because of their therapeutic importance, the structural mechanism of GPCR signaling is of great interest in the field of drug discovery. Hydrogen/deuterium exchange mass spectrometry (HDX-MS) is a useful tool for analyzing ligand binding sites, the protein-protein interaction interface, and conformational changes of proteins. However, its application to GPCRs has been limited for various reasons, including the hydrophobic nature of GPCRs and the use of detergents in their preparation. In the present study, we tested the application of bicelles as a means of solubilizing GPCRs for HDX-MS studies. GPCRs (e.g., β<SUB>2</SUB>-adrenergic receptor [β<SUB>2</SUB>AR], μ-opioid receptor, and protease-activated receptor 1) solubilized in bicelles produced better sequence coverage (greater than 90%) than GPCRs solubilized in n-dodecyl-β-D-maltopyranoside (DDM), suggesting that bicelles are a more effective method of solubilization for HDX-MS studies. The HDX-MS profile of β<SUB>2</SUB>AR in bicelles showed that transmembrane domains (TMs) undergo lower deuterium uptake than intracellular or extracellular regions, which is consistent with the fact that the TMs are highly ordered and embedded in bicelles. The overall HDX-MS profiles of β<SUB>2</SUB>AR solubilized in bicelles and in DDM were similar except for intracellular loop 3. Interestingly, we detected EX1 kinetics, an important phenomenon in protein dynamics, at the C-terminus of TM6 in β<SUB>2</SUB>AR. In conclusion, we suggest the application of bicelles as a useful method for solubilizing GPCRs for conformational analysis by HDX-MS.</P> [FIG OMISSION]</BR>
An Estimation of the Average Waiting Cost of Vessels Calling Container Terminals in Northern Vietnam
Minh-Duc Nguyen,김성준 해양환경안전학회 2019 海洋環境安全學會誌 Vol.25 No.1
Several studies have been completed on the topic of container terminals in Northern Vietnam. Few of them, however, deal with competition in terms of costs related to vessel waiting time or cargo handling. This paper estimates the average waiting cost per TEU for all the container terminals in Northern Vietnam. After average waiting time was first estimated by applying queuing theory, uncertainty theory was applied to estimated vessel daily cost. A simulation was performed to create a series of data representing waiting cost per TEU in relation to the rate of volume handled/capacity of each terminal. Non-linear regression based on this series was used to present a function for the relationship between the average waiting cost of each terminal and the rate of volume handled/capacity.