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作者： nguyen QUE phuong 山东大学

学位级别：硕士

Although competing IR theories place explanatory weight on different elements,IR theoretical approaches heavily rely on ***-realists argue that the structure of the international system and the distribution of power within it determines outcomes rather than the characteristics of ***-liberals and neo-liberal institutionists place greater emphasis on institutions or ***,a growing literature challenges these structural notions by saying that contemporary structuralism does not precisely address the actions of small *** level factors can assume greater role in explaining the foreign policy of small ***,the combination of external and internal variables reveals several problems in explaining the foreign policy behavior of small states:scholars disagree on what exactly shapes states' actions and which variable is considered the most *** literature demonstrates the absence of a grand theory or a multicausal framework to analyze how domestic factors influence foreign policy and under what conditions one becomes more critical than *** this sense,literature on Vietnam's foreign policy is theoretically divided between structural and agency-based *** unclarified gap between these theoretical dynamics shows the lack of an integrative framework to examine Vietnamese foreign *** perspectives view Vietnam as a unitary actor operating in the international system with structural constraints,thus Vietnam's foreign policy behavior is susceptible to changes in power relations in the Asia-Pacific and the force of economic ***,agency-based perspectives bring in domesticlevel factors,yet some require further empirical investigation to project its impact on foreign *** the basis of existing research,this paper presents five major factors shaping Vietnam's responses to China at the systemic and national *** the international system level,China's rise and

关键词： Vietnam,cooperation,political,bilateral,ASEAN,politics,Minister,struggle,party,Southeast,

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Void discharge behaviours as a function of cavity size and voltage waveform under very low-frequency excitation

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High Voltage 2018年第2期3卷 96-102页

作者： Hong Viet phuong nguyen Bao Toan Phung School of Electrical Engineering and Telecommunications University of New South WalesSydneyAustralia Faculty of Electrical Engineering The University of Danang-University of Science and TechnologyDanangVietnam

Measurement of partial discharge(PD)is a vital method to assess the health of the electrical insulation in high-voltage power *** diagnostic testing at very low frequency(VLF)is increasingly being used,it is important to investigate PD behaviours under such a low-frequency voltage *** study presents the PD characteristics at VLF excitation under different applied voltage waveforms,including sinusoidal and trapezoid-based ***,the effects of cavity size on PD behaviours at VLF are *** were performed to measure PDs in a cylindrical void bounded by solid *** results show that discharge activities at VLF,in general,exhibit lower magnitude and repetition rate when compared with power *** revealed is the strong dependency of discharge parameters on the rate of voltage *** mechanisms to explain discharge behaviours are given.

关键词： excitation cavity size

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Drought and conflicts at the local level: Establishing a water sharing mechanism for the summer-autumn rice production in Central Vietnam

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International Soil and Water Conservation Research 2019年第4期7卷 362-375页

作者： Chuong van Huynh Catharien Terwisscha van Scheltinga Ty Huu Pham Non Quoc Duong phuong Thi Tran Linh Hoang Khanh nguyen Tung Gia Pham Ngoc Bich nguyen Jos Timmerman Hue University Viet Nam Climate Change and Adaptive Land and Water Management Group Wageningen Environmental ResearchNetherlands University of Agriculture and Forestry Hue UniversityViet Nam

In recent years,water for agricultural production gradually became a significant challenge in the context of climate change in *** solutions are required,which consider the use of resources for both human needs and ecology,and that account for the equitable distribution and the livelihood of the farmers now and in the *** particular,the farmers in the province of Quang Nam faring water shortage in the cultivation of paddy in the summer-autumn *** arise regarding the sharing of the water between the farmers,the drinking water company and the hydropower *** the context of climate change,the water shortage is expected to increase in the *** article presents the results of participatory action research (PAR) approach to develop a local level mechanism for water sharing,in which stakeholders actively *** sharing mechanism was developed,envisioning a sustainable solution for inclusive water *** mechanism was successfully implemented in two cases,one at commune level (Tho stream) and one at the district level (Mo stream).The participatory approach proved to be successful in setting up a broadly acceptable mechanism that will need to be further incorporated in the institutional set-up.

关键词： Adaptation Agriculture Climate change Governance Rice production Water sharing

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Antibiofilm activity of alpha-mangostin loaded nanoparticles against Streptococcus mutans

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Asian Pacific Journal of Tropical Biomedicine 2020年第7期10卷 325-332页

作者： phuong T.M.nguyen Minh T.H.nguyen Lien T.Quach phuong T.M.nguyen Lam L.nguyen Dong V.Quyen Institute of Biotechnology Vietnam Academy of Science and Technology18 Hoang Quoc Viet RoadHanoiVietnam Institute of Graduate University of Science and Technology Vietnam Academy of Science and Technology18 Hoang Quoc Viet RoadHanoiVietnam University of Science and Technology of Hanoi Vietnam Academy of Science and Technology18-Hoang Quoc Viet RoadCau GiayHanoiVietnam

Objective:To investigate the antibiofilm activity of alphamangostin(AMG)loaded nanoparticle(nano AMG)against dental caries pathogen Streptococcus ***:AMG was isolated from the peels of Garcinia mangostana *** silica gel columns and chemically analysed by high performance liquid chromatography and nuclear magnetic *** AMG was prepared using the solvent evaporation method combined with high-speed *** nanoparticles were characterized using dynamic light scattering,field emission scanning electron microscopy(FE-SEM)and Fourier transform infrared spectroscopy(FTIR).The toxicity of nano AMG in fibroblast NIH/3 T3 cell line was determined using MTT *** antibiofilm effect of nano AMG was determined through the evaluation of biofilm formation by Streptococcus mutans using a 96-well *** biomass was quantified using crystal *** viability was observed under confocal microscopy using LIVE/DEAD Bac Light ***,gene expression was determined by quantitative real-time PCR and membrane permeabilization activity by measuring the uptake of o-nitrophenol-β-***:Nano AMG size was in a range of 10-50 nm with a polydispersity index of<0.3 and zeta potential value of-35.2 m *** size and the incorporation of AMG in the nanoparticles were confirmed by FE-SEM and FTIR *** IC50 values of the test agents on NIH/3 T3 cells were(9.80±0.63)μg/m L for AMG and(8.70±0.81)μg/m L for nano AMG,while no toxicity was generated from excipients used to prepare *** the early stage of biofilm formation,treatment with 6.25μmol/L nano AMG caused a reduction in biofilm biomass up to 49.1%,compared to 33.4%for *** contrast,biofilms at the late stage were more resistant to the test *** 96μmol/L(=10×MIC),nano AMG reduced only 20.7%of biofilm biomass while AMG did not showany *** of gtf B and gtf C genes involved in biofilm formation were down-regulated 3.3 and 12.5 folds,res

关键词： Alpha-mangostin Nanoparticle Antibiofilm activity Streptococcus mutans

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A fully automated framework for helicopter rotor blades design and analysis including aerodynamics,structure, and manufacturing

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Chinese Journal of Aeronautics 2016年第6期29卷 1602-1617页

作者： Ngoc Anh Vu Jae Woo Lee Tuan phuong Nam Le Song Thanh Thao nguyen Division of Computational Mechatronics Institute for Computational Science Ton Duc Thang University Faculty of Electrical & Electronics Engineering Ton Duc Thang University Department of Aerospace Information Engineering Konkuk University Faculty of Mechanical Engineering Industrial University of Ho Chi Minh City Department of Aerospace Engineering Ho Chi Minh City University of Technology Vietnam National University-Ho Chi Minh City

This study describes an integrated framework in which basic aerospace engineering aspects(performance, aerodynamics, and structure) and practical aspects(configuration visualization and manufacturing) are coupled and considered in one fully automated design optimization of rotor blades. A number of codes are developed to robustly perform estimation of helicopter configuration from sizing, performance analysis, trim analysis, to rotor blades configuration representation. These codes are then integrated with a two-dimensional airfoil analysis tool to fully design rotor blades configuration including rotor planform and airfoil shape for optimal aerodynamics in both hover and forward flights. A modular structure design methodology is developed for realistic composite rotor blades with a sophisticated cross-sectional geometry. A D-spar cross-sectional structure is chosen as a baseline. The framework is able to analyze all realistic inner configurations including thicknesses of D-spar, skin, web, number and ply angles of layers of each composite part,and materials. A number of codes and commercial software(ANSYS, Gridgen, VABS, Pre VABS,etc.) are implemented to automate the structural analysis from aerodynamic data processing to sectional properties and stress analysis. An integrated model for manufacturing cost estimation ofcomposite rotor blades developed at the Aerodynamic Analysis and Design Laboratory(AADL),Aerospace Information Engineering Department, Konkuk University is integrated into the framework to provide a rapid and dynamic feedback to configuration design. The integration of three modules has constructed a framework where the size of a helicopter, aerodynamic performance analysis, structure analysis, and manufacturing cost estimation could be quickly investigated. All aspects of a rotor blade including planform, airfoil shape, and inner structure are considered in a multidisciplinary design optimization without an exception of critical configuration.

关键词： Design optimization Helicopter rotor blades Integrated framework Modular structure design methodology Perform estimation

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Viral co-infections among children with confirmed measles at hospitals in Hanoi,Vietnam,2014

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Asian Pacific Journal of Tropical Medicine 2017年第2期10卷 164-167页

作者： Hang Le Khanh nguyen Loan phuong Do van Thanh Thi Trieu Son Vu nguyen phuong Vu Mai Hoang Hien Thi Pham Thanh Thi Le Huong Thi Thu Tran Cuong Duc Vuong Mai Thi Quynh Le National Institute of Hygiene and Epidemiology No 1-Yesrsin streetHanoiVietnam

Objective:To characterize viral co-infections among representative hospitalized measles cases during the 2014 Hanoi ***:Throat swabs were collected from 54 pediatric patients with confirmed measles,and molecular diagnostics performed for 10 additional viral respiratory pathogens(Influenza A/H1N1pdm09;A/H3N2 and influenza B;Parainfluenza 1,2,3;Respiratory Synctial Virus,RSV;human Metapneumovirus,hM PV;Adenovirus and Picornavirus).Results:Twenty-one cases(38.9%) showed evidence of infection with other respiratory viruses:15 samples contained measles plus one additional virus,and 6 samples contained measles plus 2 additional *** was detected as a predominant cause of co-infections(13 cases;24.1%),followed by RSV(6 cases;11.1%),A/H1N1pdm09(3 cases;5.6%),PIV3(3 cases;3.7%),Rhinovirus(3 cases;3.7%) and hM PV(1 case;1.96%).Conclusions:Viral co-infections identified from pediatric measles cases may have contributed to increased disease severity and high rate of fatal *** treatment of measles cases may require control of multiple viral respiratory pathogens.

关键词： Measles virus Respiratory viruses Co-infection

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Xanthine oxidase inhibitors from Archidendron clypearia(Jack.) I.C. Nielsen: Results from systematic screening of Vietnamese medicinal plants

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Asian Pacific Journal of Tropical Medicine 2017年第6期10卷 619-626页

作者： nguyen Thuy Duong Pham Duc Vinh phuong Thien Thuong nguyen Thi Hoai Le nguyen Thanh Tran The Bach nguyen Hai Nam nguyen Hoang Anh Department of Pharmacology Hanoi University of Pharmacy Department of Pharmaceutical Analysis and Standardization National Institute of Medicinal Materials Department of Pharmacognosy Hue University of Medicine and Pharmacy Institute of Marine Biochemistry Vietnam Academy of Science and Technology Institute of Ecology and Biological Resources Vietnam Academy of Science and Technology Department of Medicinal Chemistry Hanoi University of Pharmacy

Objective: To screen Vietnamese medicinal plants for xanthine oxidase(XO) inhibitory activity and to isolate XO inhibitor(s) from the most active plant. Methods: The plants materials were extracted by methanol. The active plant materials were fractionated using different organic solvents, including n-hexane, ethyl acetate, and n-butanol. Bioassay-guided fractionation and column chromatography were used to isolate compounds. The compounds structures were elucidated by analysis of spectroscopic data, including IR, MS, and NMR. Results: Three hundreds and eleven methanol extracts(CME) belonging to 301 Vietnamese herbs were screened for XO inhibitory activity. Among these plants, 57 extracts displayed XO inhibitory activity at 100 μg/m L with inhibition rates of over 50%. The extracts of Archidendron clypearia, Smilax poilanei, Linociera ramiflora and Passiflora foetida exhibited the greatest potency with IC_(50) values below 30 μg/m L. Chemical study performed on the extract of Archidendron clypearia resulted in the isolation of six compounds, including 1-octacosanol, docosenoic acid, daucosterol, methyl gallate, quercitrin and(-)-7-O-galloyltricetiflavan. The compound(-)-7-O-galloyltricetiflavan showed the most potent XO inhibitory activity with an IC_(50) value of 25.5 μmol/L. Conclusions: From this investigation, four Vietnamese medicinal plants were identified to have XO inhibitory effects with IC_(50) values of the methanol extracts below 30 μg/m L. Compound(-)-7-O-galloyltricetiflavan was identified as an XO inhibitor from Archidendron clypearia with IC_(50) value of 25.5 μmol/L.

关键词： Xanthine oxidase Inhibitor Medicinal plants Vietnam

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In vivo anticancer activity of maesopsin 4—O— β—glucoside isolated from leaves of Artocarpus tonkinensis *** Gagnep

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Asian Pacific Journal of Tropical Medicine 2016年第4期9卷 343-348页

作者： Trinh Thi Thuy Dao Duc Thien Tran Quang Hung nguyen Thanh Tam nguyen Thi Hoang Anh nguyen Thi Nga nguyen Thi Cuc Le phuong Mai Tran van Sung Domenico V.Delfino Do Thi Thao Institute of Chemistry.Vietnam Academy of Science and Technology Institute of Biotechnology Vietnam Academy of Science and Technology National Research Council Canada Measurement Science and Standards1200 Montreal RoadBuilding M-12.Ottatca.Ontario KIA OR6 Department of Medicine University of PerugiaPiazzale Gambuli.S.Andrea delle Fratte

Objective:To investigate the antitumor effect of maesopsin 4-O-β-glucoside(TAT2) isolated from the leaves of Artocarpus tonkinensis(***) *** ***:The antitumor activity of TAT2 was evaluated in Lewis lung carcinoma(LLC) tumor-bearing ***/c mice had tumors induced by implantation with 2× 10~6 LLC cells into the subcutaneous right posterior ***-bearing mice were treated orally with a range of doses of TAT2 and a standard drug,*** were observed for tumor growth and mortality *** was collected to determine hematological and biochemical *** TAT2 was isolated from an ethanolic extract of *** *** structure was determined by MS and NMR spectroscopy,and identified as *** compound did not show acute toxicity at the highest dose tested(2 OIK) mg/kg body weight).TAT2 exhibited antitumor activity by decreasing tumor growth,increasing the survival rale,and ameliorating some hematological and biochemical parameters at doses of 100 and 200 mg/kg body weight(P<0.05).Conclusions:These results indicate that TAT2 possesses clear antitumor *** to its bioavailability and low toxicity,and the fact that it could be isolated in a large scale from *** leaves,the compound shows promise as a potential anticancer drug.

关键词： Artocarpus tonkinensis BALB/c Hematological parameters Lewis lung carcinoma Maesopsin 4-0-β-glucoside

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Morphology and kinematics of the gas envelope of the Mira binary W Aquilae

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Research in Astronomy and Astrophysics 2016年第7期16卷 47-54页

作者： Do Thi Hoai Pham Tuyet Nhung Pham Ngoc Diep nguyen Thi phuong Pham Tuan-Anh nguyen Thi Thao Pierre Darriulat Department of Astrophysics Vietnam National Satellite CenterVAST

We analyse ALMA observations of the12CO（3-2） emission of the circumstellar envelope（CSE）of the Mira variable binary star W Aql. These provide, for the first time, spatially resolved Doppler velocity spectra of the CSE up to angular distances to the central star ofy nature of the observations（only five minutes in each of～5′′（meaning some 2000 AU）. The explorator two different configurations） does not allow for a detailed modelling of the properties of the CSE but provides important qualitative information on its morphology and kinematics. Emission is found to be enhanced along an axis moving from east/west to north-east/south-west when the angular distance from the central star projected on the plane of the sky increases from zero to four arcseconds. In parallel, the Doppler velocity distribution displays asymmetry along an axis moving from east/west to north-west/south-east. The results are discussed in the context of earlier observations, in particular of the dust morphology.

关键词： stars AGB and post-AGB (stars ) circumstellar matter stars individual(W Aql) stars mass-loss radio lines stars

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^(12)CO emission from the Red Rectangle

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Research in Astronomy and Astrophysics 2015年第12期15卷 2213-2228页

作者： Pham Tuan Anh Pham Ngoc Diep Do Thi Hoai Pham Tuyet Nhung nguyen Thi phuong nguyen Thi Thao Pierre Darriulat Department of Astrophysics Vietnam National Satellite CenterVAST

Observations of an unprecedented quality made by ALMA on the Red Rectangle of CO（3-2） and CO（6-5） emissions are analysed jointly with the aim of obtaining as simple as possible a description of the gas morphology and kinematics. Evidence is found for polar conical outflows and for a broad equatorial torus in rotation and expansion. Simple models of both are proposed. Comparing CO（6-5） and CO（3-2） emissions provides evidence for a strong temperature enhancement over the polar outflows. Continuum emission （dust） is seen to be enhanced in the equatorial region. Observed asymmetries are briefly discussed.

关键词： stars: AGB and post-AGB -- circumstellar matter -- radio-lines: stars-- planetary nebulae: individual (Red Rectangle)

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