Hanoi University of Science and Technology

Hanoi, Vietnam

Hanoi University of Science and Technology "), founded 1956, is the first and largest technical university in Vietnam. Wikipedia.

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Agency: European Commission | Branch: H2020 | Program: CSA | Phase: GALILEO-4-2014 | Award Amount: 1.83M | Year: 2015

The project implements a set of coordinated actions to promote EGNSS technology in South East Asia (SEA), meanwhile supporting the competitiveness of EU enterprises facilitating their contacts with relevant GNSS stakeholders in SEA, a fast growing market of more than 600 million people. Exploiting the facilities offered in Hanoi by the NAVIS Centre - a strategic asset for Europe, setup with FP7 EU funding - European enterprises can increase their competitiveness conducting tests of their products in a challenging multi-GNSS environment, not available in Europe, with hard ionospheric activity conditions. Ten workshops organised in the different ASEAN States promote EGNSS technology and offer contact opportunities with local stakeholders to EU companies/institutions. Three editions of the Asia Oceania Regional Workshop on GNSS, an important event in SEA, are organized in collaboration with JAXA, MGA and other partners. To reach as many interested EU GNSS companies as possible, the project activities and collaboration opportunities offered by the NAVIS Centre are carefully advertised through different channels including clusters, social networks, websites etc. and three events are organized in Europe, possibly as side events of larger ones. So a larger network of long lasting relations between European companies and SEA GNSS stakeholders is built, allowing the NAVIS Centre to keep serving as a focal point for cooperation with Europe and as showcase of EGNSS technology. A competition to attract smart young researchers/entrepreneurs from ASEAN States to develop EGNSS-based business ideas/applications is also organized. The prize consists in a six-month incubation period in Europe to further implement the idea. Capacity building actions complete the project: they target SEA researchers/technicians with the aim to prepare a generation of SEA experts familiar with European technology, habits and culture and ready to support European industries willing to operate in SEA.

News Article | December 8, 2016
Site: www.prweb.com

Rigaku Oxford Diffraction is pleased to report its sponsorship of the 14th Conference of the Asian Crystallography Association (AsCA 2016). The conference, held December 4-7, 2016 at the Hanoi University of Science and Technology, was established to cover all major aspects of crystallography-related disciplines, including synchrotron/neutron, structural biology, chemical crystallography, materials and polymer science, crystal growth/crystallization, electron microscopy, and informatics. Rigaku Oxford Diffraction, representing its diverse lines of single crystal X-ray diffraction (XRD) instrumentation, was a key sponsor of the event and conducted informative presentations on a variety of topics related single crystal structure determination. ROD was formed as the global single crystal business unit of Rigaku Corporation after the acquisition of the former Oxford Diffraction organization from Agilent Technologies in 2015. ROD is a leader in the field of single crystal analysis, both in the field of chemical crystallography as well as well as macromolecular crystallography. Formed in 1951, Rigaku Corporation is a leading analytical instrumentation company based out of Tokyo, Japan About Rigaku Since its inception in Japan in 1951, Rigaku has been at the forefront of analytical and industrial instrumentation technology. Rigaku and its subsidiaries form a global group focused on general-purpose analytical instrumentation and the life sciences. With hundreds of major innovations to their credit, Rigaku companies are world leaders in X-ray spectrometry, diffraction, and optics, as well as small molecule and protein crystallography and semiconductor metrology. Today, Rigaku employs over 1,400 people in the manufacturing and support of its analytical equipment, which is used in more than 90 countries around the world supporting research, development, and quality assurance activities. Throughout the world, Rigaku continuously promotes partnerships, dialog, and innovation within the global scientific and industrial communities.

Lai N.A.,Hanoi University of Science and Technology | Fischer J.,University of Vienna
Energy | Year: 2012

Power flash cycles (PFC) are a generalization of trilateral cycles (TLC) in which the compressed liquid is heated up to its boiling point and then performs a flash expansion during which it delivers power. The end point of the expansion may be in the wet vapour region (TLC) or in the dry vapour region. Here model results are presented for PFC-systems including the heat transfer to and from the cycles with aromates, siloxanes, and alkanes as working fluids. Optimization criterion is the exergy efficiency for power production at different pairs of heat carrier and cooling agent inlet temperatures ranging from (350 °C, 62 °C) to (150 °C, 15 °C). Comparisons with TLC for water, organic Rankine cycles (ORC) and water Clausius-Rankine cycles are made. General findings are that PFC has higher power production efficiencies than ORC but larger volume flows at the expander outlet. Moreover, TLC with water have in all cases the highest or nearly highest power production efficiencies. The disadvantage of water are the large outlet volume flows at low temperatures. For these cases alkanes like cyclopentane are to be preferred in PFC which can have significantly smaller outlet volume flows and rather high power production efficiencies. © 2012 Elsevier Ltd.

Nguyen D.H.,Hanoi University of Science and Technology | Banjerdpongchai D.,Chulalongkorn University
Automatica | Year: 2011

In this paper, we present a new robust iterative learning control (ILC) design for a class of linear systems in the presence of time-varying parametric uncertainties and additive input/output disturbances. The system model is described by the Markov matrix as an affine function of parametric uncertainties. The robust ILC design is formulated as a minmax problem using a quadratic performance criterion subject to constraints of the control input update. Then, we propose a novel methodology to find a suboptimal solution of the minmax optimization problem. First, we derive an upper bound of the worst-case performance. As a result, the minmax problem is relaxed to become a minimization problem in the form of a quadratic program. Next, the robust ILC design is cast into a convex optimization over linear matrix inequalities (LMIs) which can be easily solved using off-the-shelf optimization solvers. The convergences of the control input and the error are proved. Finally, the robust ILC algorithm is applied to a physical model of a flexible link. The simulation results reveal the effectiveness of the proposed algorithm. © 2011 Elsevier Ltd. All rights reserved.

Le M.-Q.,Hanoi University of Science and Technology | Batra R.C.,Virginia Polytechnic Institute and State University
Computational Materials Science | Year: 2013

We use molecular dynamics simulations to study crack initiation and propagation in pre-cracked single layer arm chair graphene sheets deformed in simple tension by prescribing axial velocities to atoms at one edge and keeping atoms at the other edge fixed. It is found that the value of the J-integral depends upon the crack length, and for each initial crack length it increases with an increase in the crack length. Shorter initial cracks are found to propagate faster than longer initial cracks but shorter initial cracks begin propagating at higher values of the axial strain than longer initial cracks. Results computed for axial strain rates of 2.6 × 106, 2.6 × 107 and 2.6 × 108 s-1 reveal that values of the J-integral are essentially the same for the first two strain rates but different for the third strain rate even though the response of the pristine sheet is essentially the same for the three strain rates. © 2012 Elsevier B.V. All rights reserved.

Le M.-Q.,Hanoi University of Science and Technology
International Journal of Solids and Structures | Year: 2011

It was illustrated by the author in the previous work that combinations between material properties and indentation parameters can be used as mixed parameters in dimensionless functions to capture the indentation response of materials to single and dual sharp indenters. These issues are further extended in the present study. A parametric finite element analysis was performed to investigate the conical indentation response of elasto-plastic solids. Frictional effects are studied. Conical indenters of half-included angles from 50° to 88° are considered to examine several fundamental features of instrumented sharp indentation within the frame work of limit analysis. Regarding dimensional analysis, it is found that a Taylor series expansion according to the elastic indentation work-total indentation work ratio W e/Wt can be used to improve dimensionless functions. Within this context, a new set of dimensionless functions is explicitly constructed for hardness and indentation parameters of single and dual indenters. Based on formulated functions, a reverse analysis with dual sharp indenters, which was previously proposed by the author, is improved to extract mechanical properties of materials. © 2011 Elsevier Ltd. All rights reserved.

Tam P.D.,Hanoi University of Science and Technology
Current Applied Physics | Year: 2015

This paper reports single-walled carbon nanotube-based biosensors for genetically modi fied organism (GMO) detection. Electrochemical electrode and single-walled carbon nanotube field effect transistor (SWCNT-FET)-based biosensors are used to determine the CaMV 35S promoter of Roundup Ready soybean. Given optimal conditions, both biosensors can effectively detect full complementarity with concentration as low as 1 nM. The sensitivity of the electrode-based biosensor is approximately 0.6 kΩ/nM while that of the SWCNT-FET-based biosensor is 0.32 nA/nM. Both biosensors were also used to determine a polymerase chain reaction-amplified sample. The obtained results showed that both sensors determined transgenic organisms well, thereby providing a useful tool for screening analysis of food samples. © 2015 Elsevier B.V. All rights reserved.

Van Khang N.,Hanoi University of Science and Technology
Mechanics Research Communications | Year: 2011

The automatic derivation of motion equations is an important problem of multibody system dynamics. Firstly, an overview of the matrix calculus related to Kronecker product of two matrices is presented. A new matrix form of Lagrangian equations with multipliers for constrained multibody systems is then developed to demonstrate the usefulness of Kronecker product of two matrices in the study of dynamics of multibody systems. Finally, the equations of motion of mechanisms are derived using the proposed matrix form of Lagrangian equations as application examples. © 2011 Elsevier Ltd.

Le M.-Q.,Hanoi University of Science and Technology
Journal of Computational and Theoretical Nanoscience | Year: 2014

Molecular dynamics simulations were carried out to investigate the tensile mechanical behavior of hexagonal aluminum nitride (AlN), boron nitride (BN), gallium nitride (GaN), indium nitride (InN), and silicon carbide (SiC) monolayer sheets. The Tersoff and Tersoff-like potentials are used to model the interatomic interaction. Every sheet contains 4032 atoms. Stress-strain curves are established in the armchair and zigzag directions for uniaxial tensile response. Compared to graphene, hexagonal BN, SiC, AlN, InN, and GaN monolayer sheets exhibit approximately 77%, 53%, 41%, 27%, and 25% in Young's modulus; and 86%, 49%, 36%, 22% and 26% in fracture stress in the zigzag direction, respectively. Fracture strains appear about 19.5-22.8% and 15.5-17.7% in the zigzag and armchair directions, respectively. It is found that fracture stress-Young's modulus ratios of these 5 sheets and graphene are fairly different. Copyright © 2014 American Scientific Publishers.

Le M.-Q.,Hanoi University of Science and Technology
Mechanics of Materials | Year: 2012

It was illustrated by the author in the previous work that combinations between material properties and indentation parameters can be used as mixed parameters in dimensionless functions to capture the sharp indentation response of materials. These issues are further extended for spherical indentation in the present study. Instrumented spherical indentation was performed by a parametric finite element analysis for a wide range of materials with maximum indentation depth-indenter radius ratios rising from 0.01 to 0.3 to investigate several fundamental features within the frame work of limit analysis. Frictional effects are taken into account. Regarding dimensional analyses and using a Taylor series expansion, a new set of dimensionless functions is constructed for spherical indentation parameters and hardness associated to a 70.3° conical indenter. Based on formulated functions, a reverse analysis procedure is suggested to extract material properties and hardness from spherical indentation force-depth curves with respect to two different indentation depth-indenter radius ratios. Effects of indenter compliance on indentation parameters and reverse results are considered. The accuracy of the proposed method is studied and discussed by carrying out reverse and sensitivity analyses for 22 representative materials with rigid and deformable indenters. © 2011 Elsevier Ltd. All rights reserved.

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