Thu Dau Mot University

Thủ Dầu Một, Vietnam

Thu Dau Mot University

Thủ Dầu Một, Vietnam
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Nguyen H.T.T.,Thu Dau Mot University | Nguyen H.T.T.,BMT Construction Investment J.S. Company
Road Materials and Pavement Design | Year: 2017

Asphalt concrete has been considered one of the major pavement materials due to its advantages that are good workability, ease of repair and smoothness for vehicles travelling on it. However, its plastic and viscous behaviour causes a gradual accumulation of deformation under repeated vehicle loading, resulting in a shortage of traffic safety. This paper presents an elasto-viscoplastic model for asphalt concrete material undergoing finite strain in an effort to predict the permanent deformation of a pavement structure. The model uses the Perzyna viscoplastic theory and an ordinary Drucker–Prager yield surface. The well-known return mapping algorithm is used for numerical resolution, and tangent stiffness is derived for finite element implementation. Owing to the lack of a triaxial creep test device, the model parameters are determined on the basis of the Hamburg wheel tracking test results. Numerical examples are presented to assess the efficiency of the formulation proposed. The results show that the prediction achieves an acceptable level of accuracy in a low-velocity traffic area. © 2017 Informa UK Limited, trading as Taylor & Francis Group

Trang P.T.T.,Thu Dau Mot University | Dong H.Q.,Thu Dau Mot University | Toan D.Q.,Thu Dau Mot University | Hanh N.T.X.,Thu Dau Mot University | Thu N.T.,Vietnam National University, Hanoi
Energy Procedia | Year: 2017

This paper estimated the household solid waste (HSW) generation and composition in Thu Dau Mot city. The study also determined the socio-economic factors influencing the waste generation of the households in the city by using Ordinary Least Square (OLS) regression. 300 sample households were selected for the study by using a stratified random sampling methodology. The results indicated that the average HSW generation in Thu Dau Mot was 0.76 kg/household/day. These wastes comprised of six categories of wastes, with the largest component of organic waste (67%). The effect of income, household size and environmental concern on HSW generation is statically significant at 1%. This study suggests new insights concerning the role of socioeconomic characteristics in affecting the generation of household waste in Thu Dau Mot city, Vietnam. © 2017 The Authors.

Nguyen H.T.,University for Information Science and Technology | Tran P.V.,Thu Dau Mot University
2016 International Conference on Control, Automation and Information Sciences, ICCAIS 2016 | Year: 2016

Flyer is a means utilized popularly and effectively in recording landscape from above, collecting data of environment and weather, contributing to field works, especially conveying samples and medications from or to patients living in areas isolated by flood. It is necessary to track flyer's locations and characteristics for its activities. Visualization-based system for tracking flyer enables user to monitor flyer by analyzing visually multivariable flight data. Visualization-based system for tracking flyer using 3D cube represents flight data including ground position and elevation, using space-Time cube (STC) represents ground position and time, using 4D cube represents time, ground position, and elevation. Meanwhile, multipurpose flyer needs to be tracked not only time, ground position, elevation, but also characteristics. The paper proposes multidimensional cube (mD cube) for visualization-based tracking system to represent multivariable flight data including time, location, and characteristics. Multidimensional cube results from the combination of a 4D cube with a multivariate cube representing characteristics changing over time. The mD cube represents visually multivariable flight data in visualization-based tracking system to enable user to monitor flyer. With mathematical reasoning, user can understand the significance of multivariable flight data by responding several analytical tasks. © 2016 IEEE.

Trang P.T.T.,Thu Dau Mot University | Toan D.Q.,Northwest University, China | Hanh N.T.X.,Thu Dau Mot University
MATEC Web of Conferences | Year: 2017

The main objective of this paper is to investigate the household willingness to pay (WTP) for improved solid waste management in Thu Dau Mot city, Binh Duong by using Dichotomons choice Contingent Valuation Method. A questionnaire was designed to draw a sample of 330 respondents for the study. The results show that mean household willingness to pay for solid waste management system in Thu Dau Mot is about 24 thousand VND/ month/ household, higher than the current fee (20 thousand VND month/ household).The paper used a logistic regression to establish the factor affecting to the household willingness to pay for solid waste management system. The logit results show that those with a higher income and more educated is willing to pay more for improvement in management of their solid waste. Also, more environmental aware the person the more they are willing to pay. Moreover, females are less likely to give a positive response to WTP compare to male. © The Authors, published by EDP Sciences, 2017.

Du L.P.,Lac Hong University | Le T.-A.,Thu Dau Mot University | Thai N.D.,Ho Chi Minh City University of Technology | Vo P.L.,International University
International Conference on Information Networking | Year: 2017

Content-centric networking (CCN) is considered to be the future Internet which moves from host-To-host model to transfer data model based on content name. Network data caching is a characteristic of CCN whose effectiveness depends on the content caching policies in the nodes. Leave copy everywhere (LCE) is the default policy in CCN which caches all content at all nodes leading to poor caching performance. Several policies have been proposed to improve the caching performance in CCN. In this paper, we evaluate the performance of caching policies in terms of caching hit ratio, time delay, and distance from consumer to caching hit content in the first node. In addition, we compare the caching policies combined with the content replacement policies when caching space at nodes is not enough room to cache new content. Our simulation model is implemented in the Abilene and Tree network models. © 2017 IEEE.

Nguyen L.T.,Thu Dau Mot University
Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST | Year: 2017

Human Activity Recognition (HAR) is a challenging research topic in tracking a person’s state of motion and interaction with the surroundings. HAR plays an important role in developing many applications helping improve quality of life. Applications based on HAR could be used in checking the state of health, identifying a mobile phone’s context, keeping track of user’s physical activities, etc. In this research, we applied Recursive Feature Elimination based on Linear Discrimination Analysis (RFELDA) to ( reduce the dimensionality of dataset before applying classification algorithms to assign subject’s activities. The experiment results on dataset showed that RFELDA improved performance and reduced processor time better than original dataset did. © ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2017.

Ha H.M.,Thu Dau Mot University
Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST | Year: 2017

In diagnostic of hematology, one of a most important informations is to infer about echinocyte presence. The top-hat transform and its application on echinocyte detection were briefly introducted in [2]. This paper suggests a new improvement based on random method to reduce number of computation for above purpose. We explain the relation between an upper bound of number of the blood cells to perform top-hat transform and number of echinocyte in image. © ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2017.

Nguyen T.-K.,Ho Chi Minh City University of Technology and Education | Nguyen B.-D.,Thu Dau Mot University
Journal of Sandwich Structures and Materials | Year: 2015

This paper presents a new higher-order shear deformation theory for static, buckling and free vibration analysis of functionally graded sandwich beams. In this theory, the axial displacement accounts for a third-order and inverse trigonometric distribution, and the transverse shear stress satisfies the traction-free boundary conditions on the top and bottom surfaces of the beams. Governing equations of motion are derived from the Hamilton’s principle for sandwich beams with homogeneous hardcore and softcore. Navier-type solution for simply-supported beams is developed to solve the problem. Numerical results are obtained to investigate effects of the power-law index, span-to-height ratio and thickness ratio of layers on the displacements, stresses, critical buckling load and frequencies. © 2015, © The Author(s) 2015.

Hai N.M.,Thu Dau Mot University | Fellenius B.H.,2475 Rothesay Avenue
Geotechnical Special Publication | Year: 2014

Static loading tests using single-level O-cells were carried out in mid-2008 on two bored piles constructed at the Binh Loi Bridge, crossing the Saigon River at Ho Chi Minh City, Vietnam. The soils consist of surficial layers of soft clay and silt to 11 and 15 m depth on compact silty sand to about 55 m depth followed by dense to very dense silty sand. Two bored piles, 2.0 m and 1.5 m in diameter, were installed to 73.5 m and 73.0 m depth, respectively, and constructed using reverse circulation technique and bucket drill with casing advanced ahead of the hole. Drilling slurry was composed of polymer slurry for the 2.0-m diameter pile and bentonite slurry for the 1.5-m diameter pile. For both piles, the O-cell assembly was attached to a reinforcing cage lowered into the stabilized hole to 11.4 and 11.6 m, respectively, above the pile toe, five and two days after completing drilling and cleaning, respectively. Each reinforcing cage was instrumented with two pairs of diametrically opposed vibrating wire strain gauges at three levels below and five levels above the O-cell level. The static loading tests were performed 49 and 28 days, respectively, after the piles had been concreted. The strain-gauge records, when based on the nominal pile diameters, indicated Young's modulus values of about 25 GPa for the nominal cross-sections of the piles. Analysis of the records showed that residual load had developed during the wait time. The unit shaft resistance above the O-cell for the 2.0 m diameter, polymer-slurry constructed pile was moderately larger than that for the 1.5-m diameter, bentonite-slurry constructed pile. Detailed analysis showed the shaft resistance to be post-peak softening. The pile toe stress-movement responses were essentially linear and almost identical for the two piles. © 2014 American Society of Civil Engineers.

Nguyen T.B.T.,Thu Dau Mot University | Nguyen T.T.C.,Industrial University of Ho Chi Minh City | Tran H.C.,Vietnam Academy of Science and Technology | Nguyen C.K.,Vietnam Academy of Science and Technology | Tran N.Q.,Vietnam Academy of Science and Technology
International Journal of Polymer Analysis and Characterization | Year: 2015

We established two formulas to predict molecular weight of polyaminoamine dendrimers and their alkylated derivatives, based on the theoretical number of protons at specific positions in the dendrimers and the true value of the integral values of these protons appearing in proton nuclear magnetic resonance spectra. Calculated results indicated that molecular weight of the dendrimers is approximately equal to results from mass spectrometry. Degrees of alkylation were easily calculated for each dendrimer-alkylated derivative. According to the obtained results, we confirm that the use of the proton spectra can be an effective method to predict molecular weight of dendrimers. Copyright © Taylor & Francis Group, LLC.

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