Thu Dau Mot University Journal of Science

# Articles

#### Volume 4 (Issue 4 - 2022)

This study deals with the stiffness design of geometrically nonlinear structures using topology optimization. Bi-directional Evolutionary Structures Optimization (BESO) is employed to implement the design process. The geometrically nonlinear behavior of the structures are modeled using a total Lagrangian finite element formulation and the equilibrium is found using a Newton-Raphson iterative scheme. The topology optimization of linear and nonlinear modeling are implemented. The sensitivity of the objective function is found with the adjoint method and the optimization problem is solved using BESO’s update method. Objective function of complementary work is evaluated. A special technique called the continuation method is applied to solve the instability of nonlinear structure optimization. ANSYS APDL is also used to do FEA of optimal topology to verify the effectiveness of geometrically nonlinear modelling. The results show that differences in stiffness of structures optimized using linear and nonlinear modelling is generally small but it can be large in some cases, especially structure highly involving buckling behaviour.
In recent years, society has been evolving rapidly, and contemporary education is being adapted to satisfy people's requirements in accordance with 4.0 trends and the industrial revolution.This gives birth to the definition of Smart University, the study of which seeks to identify the required components for constructing a smart learning environment. The research group analysed nationally and internationally advanced models, proposing a smart university model for Thu Dau Mot University (T-SMARTHS) with smart levels matching the phases established and developed at Thu Dau Mot University.
Glioma is a deadly tumor that accounts for the majority of malignancies of the brain and central nervous system. Currently, applying biomarkers and combining with clinical treatments in the diagnosis and prognosis of Glioma is the optimal trend. Among the effective biomarkers, microRNA has emerged as a novel, efficient biomarker. In this study, we used data from the Kyoto Encyclopedia of Genome and Gene Routes Database (KEGG) and bioinformatics tools for functional prediction and annotation of two Glioma-associated molecules (miR-6780a-5p and miR-6754-3p). The result indicated that 361 genes relating with two molecules miR-6780a-5p and miR-6754-3p. In which, miR-6780a-5p interacts with 198 genes and miR-6754-3p interacts with 166 genes. PPI analysis (protein-protein interaction analysis) and functional enrichment analysis revealed that target molecules of two miRNAs (miR-6780a-5p, miR-6754-3p) belong to cancer signaling pathways such as MAPK (Mitogen-activated protein kinase) and WNT (Wingless-related integration site). In addition, two miRNAs (miR-6780a-5p and miR-6754-3p) affect not only Glioma but also regulation in many other cancers such as pancreatic, thyroid, and endometrial cancer. Briefly, the result has clarified the role of (miR-6780a-5p, miR-6754-3p) in regulating signaling pathway of Glioma, thereby evaluating the interaction between miRNAs, target genes and target signaling pathways, and also supporting for the selection of potential biomarkers in Glioma diagnosis
In this paper, we consider initial value problems for nonlinear fractional equations where source functions may discontinuous. We obtain the existence and uniqueness of maximal mild solutions of the problem. We also give some appropriate conditions such that mild solutions of the problem blow-up at a finite time. Furthermore, we discuss the continuous dependence of mild solutions of the problem with respect to fractional order.

#### Enhancing students’ productive skills in English Language Teaching through Project-Based Learning at Foreign Trade University – HCMC campus

By Dang Thi My Dung, Phan Thi Nhat Phuong, Pham Nguyen Khanh Thuong, Ngo Thi Huyen Trang, Vu Thi My Hao
Published online 15/12/2022
DOI: 10.37550/tdmu.EJS/2022.04.364
This article presents the results of a study on the current application of Project-based learning (PBL) in the teaching of English productive skills to students at the Foreign Trade University - Ho Chi Minh City Campus and how students can improve them. The research also provides insights into the expectations of students and entrepreneurs on that matter. The research group used the 5-point Likert scale in a questionnaire to collect data from students and interviewed FTU - HCMC’s English teachers and entrepreneurs to give further suggestions. Wilcoxon signed-rank test was used to analyze whether or not there is a significant difference in students’ English productive skills before and after using PBL in English language learning. This study found a significant difference in speaking skills of FTU - HCMC students before and after participating in PBL activities. The students improved their comprehension, range and the ability to deliver their ideas to the target reader for writing skills. However, no difference was found in their content, cohesion, and accuracy. Interviewed teachers and entrepreneurs supported the implementation of PBL in schools. Overall, PBL is encouraged in the settings of higher education institutions.
Vietnamese immigrants in the United States encounter a variety of acculturation issues that affect them as individuals, families, and as members of their communities. It is evidenced in the literature that low-socio status immigrants suffered from those acculturation challenges. However, there is scant research on how acculturation affects high-socio status immigrants in general and Vietnamese American immigrants in particular. To better understand how high-educated Vietnamese families coped with acculturation in the United States, this research used semi-structured interviews to examine the acculturation issues they encountered and the techniques they utilized to overcome those issues. Four well-educated participants were interviewed one-on-one for 20-30 minutes each by Google Meet in Vietnamese whenever they were available. The interviews were transcribed using unfocused transcription, and the data was analyzed using grounded theory technique. Results showed that high-educated Vietnamese immigrants in the United States face three major acculturation challenges: orientation, the necessity of better economic and self-esteem needs. However, women seemed to be under more acculturative stress owing to their lower levels of English proficiency and work satisfaction, according to the findings. In terms of coping methods, the husbands use integration acculturation tactics to deal with their issues. Separation methods were adopted by the women at various periods in their life, despite the fact that they are eager to become fully integrated members of American culture. They are unable to do so due to a lack of urgency and lack of access to cultural integration.
Premarital sex is one of the issues that female migrant workers currently face. This increases the risk of sexual and reproductive health issues among this vulnerable group. The article's goal is to comprehend and explain the attitude of female migrant workers regarding premarital sex while also analyzing the factors that influence their attitudes toward this issue. The theories of social control and migration are the foundation for this objective. The combined approach used in this paper collects quantitative data from 420 female migrant workers and qualitative data from seven female migrant workers who participated in in-depth interviews. According to research findings, female migrant workers are considerably more agreeable to premarital sex if both are voluntary, but they do not feel ready to discuss premarital sex with those around them. The level of education and length of residence are factors that affect how female migrant workers feel about the premarital sex concern. In order to enhance their autonomy and reduce risky sexual behaviors, we can thus propose that female migrant workers, especially those with a residence length of more than five years, should have greater reproductive health capacity, including reproductive health knowledge and skills.
Recognized as a smart city, Binh Duong's smart city development strategy also includes the development of automated agriculture, typically large-scale livestock farming. A sustainable urban development will not be able to ignore the factor of providing food for urban and regional people. Phu Giao district - Binh Duong province is one of the leading districts in livestock farming, especially concentrated pig farming. The agricultural industry, pigs breeding, is one of the strengths of the district, besides the cultivation of short and long-term industrial crops such as rubber, cashew, Ho Tieu... Livestock is a very old profession of the Vietnamese people in Phu Giao district as well as in Binh Duong province. The contribution of livestock production to the socio-economic face of the district cannot be denied. However, animal husbandry activities, besides the economic values, also cause some consequences to the natural environment such as soil and water pollution, noise, odors in the air, etc. Hence, we decided to do the research of "Application of ISO 14001:2015 international standards in determination of environmental aspects at market hog farm with semiautomatic technology farm size 12,000 pigs per year in Phu Giao district, Binh Duong province" (TCVN ISO, 2015). This is a large-scale pig farm with modern semi-automatic technology equipment. We expect to find out environmental issues in the most detailed and specific way so that the owner can overcome the above environmental problems, rest assured to raise livestock and develop more expansion later. We conducted a review of the areas on the farm, evaluated the activities in each area, from which we found out the environmental problems through the material flow diagram (Phạm Thị Hồng Cẩm, 2020). Next, through the multi-criteria method (Phạm Thị Hồng Cẩm, 2020) we calculated the score and found the most significant environmental aspects (most environmental risk). The research results will be a general picture to provide farm owners with an intuitive and easy-to-understand view for suitable solutions. Developing farm economy along with environmental protection towards sustainable development of livestock agriculture.
In this paper, we establish compactness and continuous dependence on parameters for solution-set of the second order differential inclusion including self-adjoint operator in the form \begin{align*} \left\{ \begin{gathered} \frac{\partial^2}{\partial t^2} u(t,x) +2\mathcal{A} \frac{\partial}{\partial t}u(t,x)+\mathcal{A}^{2} u(t,x) \in F(t,u(t),\mu),\,\, \hfill (t,x)\in [0,T)\times\Omega \\ u(0,x)=\frac{\partial }{\partial t}u(0,x)=0, \,\, \hfill x \in \Omega, \\ %u(T,x) = h(x), \,\, \hfill x\in\Omega, \end{gathered}\right. %\label{MainProblem} \end{align*} where $\mathcal A$ is a self-adjoint operator. We use the spectral theory on Hilbert spaces to obtain formulation for mild solutions. Using the mild solution formula together with a measure of non-compactness with values in an ordered space, we construct useful bounds for solution operators. Then, we establish necessarily upper semi-continuous and condensing settings, which mainly help to obtain the global existence of mild solutions and the compactness of the mild solution set. Finally, we provide a brief discussion on the continuous dependence of the solution-set on parameter $\mu$.

#### Antidiabetic vegetables presently traded in Sri Lanka's Vavuniya District

By Pholtan Rajamanoharan, Saravanan Vievekanandarajah, Vinujan Shanmugalingam
Published online 15/12/2022
DOI: 10.37550/tdmu.EJS/2022.04.363
Diabetes affected about 537 million adults aged 20 to 79 in 2021. Higher vegetable intake helps to manage type 2 diabetes mellitus. Thus, this research aimed to recognize and record the vegetable species currently sold in Sri Lanka's Vavuniya District. At least three fieldwork visits were made between January 2019 and January 2022 to each of the Vavuniya District's major market sites, as well as the neighboring vegetable shops and street stalls. Until June 2022, published relevant research papers were searched in the Web of Science, PubMed, and ScienceDirect databases for the recorded vegetable species in this study to assess the antidiabetic scientific proof. This study recognized and recorded 72 vegetable species from 25 families. Consequently, a study of the literature on 65 vegetable species found that most of the vegetable species had in vivo (37%), followed by clinical (15%), and in vitro (14%) scientific evidence, and six antidiabetic active substances were isolated from the analyzed vegetable species. This work establishes the foundation for additional studies on the fruit species traded in Vavuniya District.

#### Publication Information

Publisher

Thu Dau Mot University, Viet Nam

Honorary Editor-in-Chief and Chairman of the Editorial Board

Assoc. Prof. Nguyen Van Hiep

Deputy Editor-in-Chief

PhD. Trần Hạnh Minh Phương
Thu Dau Mot University

Editorial Board

Prof. Tran Van Doan
Fujen University, Taiwan
Prof. Zafar Uddin Ahmed
Vietnam National University Ho Chi Minh City

Prof.Dr. Phillip G.Cerny
The University of Manchester, United Kingdom
Prof. Ngo Van Le
University of Social Sciences and Humanities (VNU-HCM)

Prof. Bui The Cuong
Southern Institute of Social Sciences​​​​​​​
Prof. Le Quang Tri
Can Tho University

Assoc. Prof. Nguyen Van Duc
Animal Husbandry Association of Vietnam
Assoc. Prof. Ted Yuchung Liu
National Pingtung University, Taiwan

PhD. Anita Doraisami
Economics Monash University, Australia
Prof. Dr. Andrew Seddon
Asia Pacific University of Technology & innovation (APU)

Assoc. Prof. Le Tuan Anh
Thu Dau Mot University
Prof. Abtar Darshan Singh
Asia Pacific University, Malaysia

Prof.Dr. Ron W.Edwards
The University of Melbourne, Australia
Assoc. Prof. Hoang Xuan Nien
Thu Dau Mot University

PhD. Nguyen Duc Nghia
Vietnam National University Ho Chi Minh City
PhD. Bao Dat
Monash University (Australia)

PhD. Raqib Chowdhury
Monash University (Australia)
PhD. Nguyen Hoang Tuan
Thu Dau Mot University

PhD. Nguyen Thi Lien Thuong
Thu Dau Mot University

Assistant

Nguyen Thi Man
Thu Dau Mot University