Browsing by Type "journal-article"
  • Publication
    A Composite Method for Improving the Pulse Shape Discrimination Efficiency of a Scintillation Detector Using EJ-301 Liquid
    ( 2021)
    Phan Van Chuan
    ;
    Nguyen Xuan Hai
    ;
    Nguyen Ngoc Anh
    ;
    Pham Dinh Khang
    ;
    Nguyen Quang Hung
    ;
    Truong Van Minh
    ;
    Nguyen Duy Ly
    This article presents a composite (COM) method to obtain the high-resolution pulse shape discrimination (PSD) for the neutron and gamma-ray pulses generated from scintillation detectors. The method, which is based on a selective combination of the digital charge integration (DCI) with the reference pulse method, aims to reduce the mixed radiation events in the low-energy range. An EJ-301 liquid scintillation detector together with a fast sampling analog-to-digital converter (ADC) is used to measure and digitize the pulses induced from the radioactive decays of 60 Co and 252 Cf, which are then analyzed by our COM method. The proposed method is evaluated using the figure of merit (FoM) and separation quality function F(u), and the results are compared with three known methods, namely the DCI, standard event fit (SEF), and artificial neural network (ANN) methods. We show that the average values of FoM and F(u) obtained within the COM method are about ten times higher than those obtained within the DCI and SEF in the whole energy range from 50 to 1000 keV electron equivalent (keVee). In particular, by using the COM method, the percentage of gamma events being confused as neutrons ranges from 0.32% to 8.80% when the energy is reduced from 400 to 50 keVee. This finding, which is significantly lower than those obtained by using the DCI and SEF, indicates that the proposed COM method should be considered as a leading method for producing a neutron/gamma PSD counter system with high resolution.
  • Publication
    A Critical View of Tube-House Architecture on Urban Type in Vietnam
    ( 2021)
    Ngo Minh Hung
    Hanoi is the largest city in Vietnam. It is a political and socio-economic center, where attracting planners’ and environmentalist’s interests. Nowadays, Hanoi has been facing problems of rapid urbanization like many major cities in developing countries. Major commercial activity and pressure occur on almost all streets of the Ancient Quarter and causing local housing issues in a different socio-economic context. This paper aims to provide a deep view of housing issues and tube-house heritage in Vietnam referenced shop-houses in Singapore, Thailand, and Malaysia, respectively. The research used methods collecting primary data (observation, purposeful discussion) and secondary data to clarify factors, which are related to tube-house in the Quarter. It also presents the findings of such developmental history of tube-house, its typical structure, composition, and construction method as considerably important foundations for conservation activities. To enhance conservation strategy and improve “spirit” protection of Ancient Quarter for a better living environment to the year 2025, a framework for tube-house preservation covering “Inside-to-Outside” approach is proposed accordingly.
  • Publication
    A current sensor fault diagnosis method based on phase angle shift technique applying to induction motor drive
    ( 2022)
    Quang Sy Vu
    ;
    Cuong Dinh Tran
    ;
    Bach Hoang Dinh
    ;
    Chau Si Thien Dong
    ;
    Hung Tan Huynh
    ;
    Huy Xuan Phan
    An improved method using the phase angle shift characteristic of the sine wave is proposed to diagnose the fault states of the current sensors in an induction motor drive. The induction motor drive (IMD) system applied in this study uses the field-oriented control (FOC) loop with integrated two current sensors and a speed encoder to control the rotor speed. The space vectors created from the phase angle shift technique are compared to the estimated current for the fault diagnosis algorithm. Various types of current sensor failures are investigated by MATLAB/Simulink software to check the effectiveness of the proposed method. The simulation results have proved the performance of the proposed method in enhancing the reliability and stability of the IMD system.
  • Publication
    A density functional theory study on silver and bis-silver complexes with lighter tetrylene: are silver and bis-silver carbenes candidates for SARS-CoV-2 inhibition? Insight from molecular docking simulation
    ( 2020)
    Thanh Q. Bui
    ;
    Huynh Thi Phuong Loan
    ;
    Tran Thi Ai My
    ;
    Duong Tuan Quang
    ;
    Bui Thi Phuong Thuy
    ;
    Vo Duy Nhan
    ;
    Phan Tu Quy
    ;
    Pham Van Tat
    ;
    Duy Quang Dao
    ;
    Nguyen Tien Trung
    ;
    Lam K. Huynh
    ;
    Nguyen Thi Ai Nhung
    Ribavirin and remdesivir have been preclinically reported as potential drugs for the treatment of SARS-CoV- 2 infection, while light silver tetrylene complexes (NHEPh–AgCl and (NHEPh–AgCl)2 with E ¼ C, Si, and Ge) have gained significant interest due to their promising applicability on the cytological scale. Firstly, the structures and bonding states of silver–tetrylene complexes (NHE–Ag) and bis-silver–tetrylene complexes (NHE–Ag-bis) were investigated using density functional theory (DFT) at the BP86 level with the def2-SVP and def2-TZVPP basis sets. Secondly, the inhibitory capabilities of the carbene complexes (NHC–Ag and NHC–Ag-bis) and the two potential drugs (ribavirin and remdesivir) on human-protein ACE2 and SARS-CoV-2 protease PDB6LU7 were evaluated using molecular docking simulation. The carbene ligand NHC bonds in a head-on configuration with AgCl and (AgCl)2, whereas, the other NHE (E ¼ Si and Ge) tetrylene ligands bond in a side-on mode to the metal fragments. The bond dissociation energy (BDE) of the NHE–Ag bond in the complex families follows the order of NHC–Ag > NHSi–Ag > NHGe–Ag and NHSi–Ag-bis > NHGe–Ag-bis > NHC–Ag-bis. The natural bond orbital analysis implies that the [NHEPh/AgCl] and [(NHEPh)2/(AgCl)2] donations are derived mainly from the s- and pcontributions of the ligands. The docking results indicate that both the ACE2 and PDB6LU7 proteins are strongly inhibited by silver–carbene NHC–Ag, bis-silver–carbene NHC–Ag-bis, ribavirin, and remdesivir with the docking score energy values varying from 17.5 to 16.5 kcal mol 1 and 16.9 to 16.6 kcal mol 1, respectively. The root-mean-square deviation values were recorded to be less than 2 A in all the calculated systems. Thus, the present study suggests that silver–carbene NHC–Ag and bissilver– carbene NHC–Ag-bis complexes are potential candidates to inhibit ACE2 and PDB6LU7, and thus potentially conducive to prevent infection caused by the SARS-CoV-2 virus.
  • Publication
    A localized hybrid kernel meshless technique for solving the fractional Rayleigh–Stokes problem for an edge in a viscoelastic fluid
    ( 2023)
    Zakieh Avazzadeh
    ;
    Omid Nikan
    ;
    Anh Tuan Nguyen
    ;
    Van Tien Nguyen
    "This paper presents an efficient stabilized meshless technique with a hybrid kernel to simulate the fractional Rayleigh–Stokes problem for an edge in a viscoelastic fluid. The proposed method approximates the unknown solution through two phases. Firstly, the temporal discretization of the govern model is performed by integrating both sides of it, and then the space discretization is obtained by making use of the local hybrid Gaussian-cubic kernel meshless. The localized approach considers merely neighboring collocation nodes, while avoiding the ill-conditioning occurring in other techniques with dense and large matrix systems. The semidiscretized approach in terms of the convergence and stability properties is discussed theoretically in the weighted 𝐻1-norm and confirmed numerically. Two illustrative examples are given to show the efficiency and applicability of the proposed strategy."
  • Publication
    A Model for Selecting a Biomass Furnace Supplier Based on Qualitative and Quantitative Factors
    ( 2021)
    Chia-Nan Wang
    ;
    Hsin-Pin Fu
    ;
    Hsien-Pin Hsu
    ;
    Van Thanh Nguyen
    ;
    Viet Tinh Nguyen
    ;
    Ansari Saleh Ahmar
    In developing countries, solar energy is the largest source of energy, accounting for 35%–45% of the total energy supply. This energy resource plays a vital role in meeting the energy needs of the world, especially in Vietnam.Vietnam has favorable natural conditions for this energy production. Because it is hot and humid, and it has much rainfall and fertile soil, biomass develops very quickly. Therefore, byproducts from agriculture and forestry are abundant and continuously increasing. However, byproducts that are considered natural waste have become the cause of environmental pollution; these include burning forests, straw, and sawdust in the North; and rice husks dumped into rivers and canals in the Mekong Delta region. Biomass energy is provided in a short cycle, is environmentally safe to use and is encouraged by organizations that support sustainable development. Taking advantage of this energy source provides energy for economic development and ensures environmental protection. Due to the abovementioned favorable conditions, many biomass energy plants are being built in Vietnam. Like other renewable energy investment projects, the selection of the construction contractor, the selection of equipment for the installation of the power plant, and the choice of construction site are complexmulti-criteria decisions. In this case, decisionmakers must evaluate many qualitative and quantitative factors. These factors interact with each other and it is difficult to use personal experience to choose the optimal solution for such complex decision-making problems, especially in a fuzzy decision-making environment. Therefore, in this study, the authors use a Multi-Criteria Decision-Making (MCDM) model that uses a Fuzzy Analytic Hierarchy Process (FAHP) model and the Combined Compromise Solution (CoCoSo) algorithm to select biomass furnace suppliers utilizing both qualitative and quantitative factors. Furthermore, the results of this work will provide the first look at a hybrid CoCoSo/FAHP method that decision-makers in other fields can use to find the best supplier
  • Publication
    A model of reforming Institutional Structure to manage Open-Space in Hanoi City, Vietnam
    ( 2021)
    N M Hung
    A new Hanoi city had been expanded over 3,300km2, which merged the old Hanoi with Ha Tay province and parts of Vinh Phuc and Hoa Binh provinces from August 1, 2008. After more than 10 emerge years, the population in the new city has gone up to over 8,05 million people in 2020. Improving urban living environment is one of the important targets for the new Hanoi, and managing open-space (m-OS) is a key element in achieving this goal. M-OS is a crucial issue since the expansion and re-zoning of the city can increase the rate of urbanization, cause disappearance of open-space and lead to a serious deterioration of living conditions. Administratively, institutions need to be reformed to effectively manage open spaces in the expanded Hanoi and there is a need to implement specific strategies to manage these areas. This paper aims to provide a solution in managing open-spaces. A managerial model consists of regulatory simplification and adjustment, decentralization of decision-making and simplification of open-space management process. Lastly, proposing an active plan is necessary to implement such strategies successfully and ensure effective and efficient management of open-space and community participation for a mega- Hanoi.
  • Publication
    A molecular docking simulation study on potent inhibitors against Rhizoctonia solani and Magnaporthe oryzae in rice: silver-tetrylene and bis-silver-tetrylene complexes vs. validamycin and tricyclazole pesticides
    ( 2020)
    Bui Thi Phuong Thuy
    ;
    Tran Thi Ai My
    ;
    Nguyen Thi Thanh Hai
    ;
    Huynh Thi Phuong Loan
    ;
    Le Trung Hieu
    ;
    Tran Thai Hoa
    ;
    Thanh Q. Bui
    ;
    Ho Nhat Tuong
    ;
    Nguyen Thi Thu Thuy
    ;
    Doan Kim Dung
    ;
    Pham Van Tat
    ;
    Phan Tu Quy
    ;
    Nguyen Thi Ai Nhung
    Rice, well known as the most important staple food source worldwide, is highly susceptible to many infectious diseases, especially rice sheath blight caused by fungus Rhizoctonia solani and rice blast caused by fungus Magnaporthe oryzae. The inhibitory ability of silver- and bis-silver-tetrylene complexes, including Ag-E and bis-Ag-E with E = C, Si, Ge, onto protein 4G9M in Rhizoctonia solani and protein 6JBR in Magnaporthe oryzae was theoretically investigated using molecular docking simulation methodology. Two commercial pesticides selected as inhibitory references are validamycin for 4G9M and tricyclazole for 6JBR. The results reveal that bis-silver-tetrylene complexes perform the strongest inhibitory effects towards both proteins. The structures of the complexes exhibit good site–site binding to both proteins given the observations on the hydrogen bond interactions, cation–π bonds, π–π bonds, and ionic interactions, interaction distance between amino acids and ligands, and van der Waals interactions. The inhibitory capacity onto protein 4G9M decreases in the following order: bis-Ag-C > bis-Ag-Si > bis-Ag-Ge > validamycin > Ag-C ≈ Ag-Si ≈ Ag-Ge. The corresponding order observed from the study for protein 6JBR is bis- Ag-C > bis-Ag-Si ≈ bis-Ag-Ge > tricyclazole ≈ Ag-C ≈ Ag-Si ≈ Ag-Ge. The study opens a promising approach to tackle rice blast and rice sheath blight based on a family of silver-tetrylene organometallic chemicals given the theoretical proof of environment-advanced properties and molecule-scaled effectiveness.
  • Publication
    A molecular docking simulation study on potent inhibitors against Rhizoctonia solani and Magnaporthe oryzae in rice: silver-tetrylene and bis-silver-tetrylene complexes vs. validamycin and tricyclazole pesticides
    ( 2020)
    Bui Thi Phuong Thuy
    ;
    Tran Thi Ai My
    ;
    Nguyen Thi Thanh Hai
    ;
    Huynh Thi Phuong Loan
    ;
    Le Trung Hieu
    ;
    Tran Thai Hoa
    ;
    Thanh Q. Bui
    ;
    Ho Nhat Tuong
    ;
    Nguyen Thi Thu Thuy
    ;
    Doan Kim Dung
    ;
    Pham Van Tat
    ;
    Phan Tu Quy
    ;
    Nguyen Thi Ai Nhung
    Rice, well known as the most important staple food source worldwide, is highly susceptible to many infectious diseases, especially rice sheath blight caused by fungus Rhizoctonia solani and rice blast caused by fungus Magnaporthe oryzae. The inhibitory ability of silver- and bis-silver-tetrylene complexes, including Ag-E and bis-Ag-E with E = C, Si, Ge, onto protein 4G9M in Rhizoctonia solani and protein 6JBR in Magnaporthe oryzae was theoretically investigated using molecular docking simulation methodology. Two commercial pesticides selected as inhibitory references are validamycin for 4G9M and tricyclazole for 6JBR. The results reveal that bis-silver-tetrylene complexes perform the strongest inhibitory effects towards both proteins. The structures of the complexes exhibit good site–site binding to both proteins given the observations on the hydrogen bond interactions, cation–π bonds, π–π bonds, and ionic interactions, interaction distance between amino acids and ligands, and van der Waals interactions. The inhibitory capacity onto protein 4G9M decreases in the following order: bis-Ag-C > bis-Ag-Si > bis-Ag-Ge > validamycin > Ag-C ≈ Ag-Si ≈ Ag-Ge. The corresponding order observed from the study for protein 6JBR is bis- Ag-C > bis-Ag-Si ≈ bis-Ag-Ge > tricyclazole ≈ Ag-C ≈ Ag-Si ≈ Ag-Ge. The study opens a promising approach to tackle rice blast and rice sheath blight based on a family of silver-tetrylene organometallic chemicals given the theoretical proof of environment-advanced properties and molecule-scaled effectiveness.
  • Publication
    A Multicriteria Decision-Making Model for the Selection of Suitable Renewable Energy Sources
    ( 2021)
    Chia-Nan Wang
    ;
    Jui-Chung Kao
    ;
    Yen-Hui Wang
    ;
    Van Thanh Nguyen
    ;
    Viet Tinh Nguyen
    ;
    Syed Tam Husain
    With the expansion of its industrial and manufacturing sectors, with the goal of positioning Vietnam as the world’s new production hub, Vietnam is forecast to face a surge in energy demand. Today, the main source of energy of Vietnam is fossil fuels, which are not environmentally friendly and are rapidly depleting. The speed of extraction and consumption of fossil fuels is too fast, causing them to become increasingly scarce and gradually depleted. Renewable energy options, such as solar, wind, hydro electrical, and biomass, can be considered as sustainable alternatives to fossil fuels. However, to ensure the effectiveness of renewable energy development initiatives, technological, economic, and environmental must be taken in consideration when choosing a suitable renewable energy resource. In this research, the authors present a multi-criteria decision-making model (MCDM) implementing the grey analytic hierarchy process (G-AHP) method and the weighted aggregates sum product assessment (WASPAS) method for the selection of optimal renewable energy sources for the energy sector of Vietnam. The results of the proposed model have determined that solar energy is the optimal source of renewable energy with a performance score of 0.8822, followed by wind (0.8766), biomass (0.8488), and solid waste energy (0.8135) based on the calculations of the aforementioned methods.
  • Publication
    A new flowchart for parameters calculation of Hybrid Active Power Filter with Injection Circuit
    ( 2021)
    Tung Khac Truong
    ;
    Chau Minh Thuyen
    ;
    Seyedali Mirjalili
    This paper presents a new flowchart for parameters calculation of Hybrid Active Power Filter with Injection Circuit (IHAPF). The first is the necessity to use the IHAPF model and the parameters of the IHAPF needed to search have been shown. Next, the constraints of the parameters to be searched and the objective function to be reached are given. Since then a flowchart is designed to look for parameters of IHAPF using the Jaya optimization algorithm. The Jaya algorithm has the advantage of simplicity, few parameters, and good performance. Therefore it reduces search time. Compared to the flowchart using the firefly algorithm, particle swarm optimization algorithm, and simulated annealing algorithm, the simulation results performed on an IHAPF 10kV-50Hz model have proven that: the proposed flowchart gives better results in minimizing the compensation errors, minimum phase shift angle between supply current, and source voltage, minimum total harmonic distortion of supply current.
  • Publication
    A New Hybrid Triple Bottom Line Metrics and Fuzzy MCDM Model: Sustainable Supplier Selection in the Food-Processing Industry
    ( 2022)
    Nguyen Van Thanh
    ;
    Nguyen Thi Kim Lan
    Vietnam’s food processing and production industries in the past have managed to receive many achievements, contributing heavily to the growth of the country’s economic growth, especially the production index. Even with an increase of 7% per year over the past five years, the industry currently also faces problems and struggles that require business managers to rewrite legal documents and redevelop the business environment as well as the production conditions in order to compete better and use the available resources. Xanthan gum (a food additive and a thickener) is one of the most used ingredients in the food-processing industry. Xanthan gum is utilized in a number of variety of products such as canned products, ice cream, meats, breads, candies, drinks, milk products, and many others. Therefore, in order to improve competitiveness, the stage of selecting raw-material suppliers is a complicated task. The purpose of this study was to develop a new composite model using Triple Bottom Line Metrics, the Fuzzy Analytical Hierarchy Process (FAHP) method, and the Combined Compromise Solution (CoCoSo) algorithm for the selection of suppliers. The application process was accomplished for the Xanthan-gum (β-glucopyranose (C35H49O29)n) supplier selection in a food processing industry. In this study, the model building, solution, and application processes of the proposed integrated model for the supplier selection in the food-processing industry are presented.
  • Publication
    A new resorcinol derivative from the bark of Aegiceras floridum (Primulaceae)
    ( 2020)
    Huynh-Van-Long Luu
    ;
    Thi-Hoai-Thu Nguyen
    ;
    Kim-Phi-Phung Nguyen
    ;
    Huu-Hung Nguyen
    ;
    Ngoc-Hong Nguyen
    ;
    Thuc-Huy Duong
    Chemical investigation of the Vietnamese plant Aegiceras floridum Roem. & Schult. (Primulaceae) led to the isolation of the new compound 3-methoxy-5-nonylphenol (1) along with five known ones 2,8,10-trihydroxy-6H-benzo[c]chromen-6-one (2), 2-hydroxy-5-methoxy-3-nonylbenzo-1,4-quinone (3), 5-(3-hydroxypropyl)-7-methoxy-3-(methylbenzofuran-2-yl)-3-methoxyphenol (4), 2,8-dihydroxy-7-methoxy-3,9-diundecyldibenzofuran-1,4-dione (5) and 10-hydroxy-4-methoxy-2,11-diundecylgomphilactone (6). The structures were elucidated by analysis of their HRESIMS and NMR data as well as the comparison of their NMR data with those reported in the literature. The cytotoxic activity of selected isolated compounds against some cancer cell lines such as human epithelial carcinoma (HeLa), human lung cancer (NCI-H460), liver hepatocellular carcinoma (HepG2), human breast cancer (MCF-7), and acute T cell leukemia (Jurkat) was evaluated. Among them, 3 showed moderate activities against MCF-7 with an IC50 of 17.77 µM and NCI-H460 with an IC50 of 25.02 µM. The result of DPPH radical scavenging activity assay indicated that compounds 2–4 and 6 revealed weak antioxidant activity.
  • Publication
    A note on the smallest semicopula-based universal integral and an application
    ( 2022)
    Tran Nhat Luan
    ;
    Do Huy Hoang
    ;
    Tran Minh Thuyet
    ;
    Huynh Ngoc Phuoc
    ;
    Kieu Huu Dung
    In this paper, we study two properties of the seminormed fuzzy integral. By applying these results, we propose alternative proof of the monotone convergence theorems for smallest semicopula-based universal integrals, which are proposed by J. Borzová-Molnárová et al. in 2015.
  • Publication
    A novel gold nanoparticle-based colorimetric assay for highly sensitive detection of ascorbic acid
    ( 2022)
    Thi Hong Anh Nguyen
    ;
    Vu Tuyet Mai Nguyen
    ;
    Van Thuan Le
    ;
    Van-Dat Doan
    ;
    Tan Phat Chau
    ;
    Van Cuong Nguyen
    ;
    Anh-Tien Nguyen
    ;
    Yasser Vasseghian
    In this study, a novel approach for colorimetric detection of ascorbic acid (AA) was proposed based on the peroxidase-like activity of gold nanoparticles, which were synthesized using Oldenlandia corymbosa leaves extract (OC-AuNPs). The OC-AuNPs synthesis was optimized at 0.5 mM Au3+, a reaction time of 20 min, and a temperature of 60 °C. The results showed that the biogenic OC-AuNPs presented as highly-efficient peroxidase mimics for catalyzing H2O2 to oxidize 3,3′,5,5′-tetramethylbenzidine forming a typical blue product with the characteristic absorption at 654 nm. The developed colorimetric method exhibited high sensitivity for AA with a detection limit of 0.26 μM in the linear range of 0 – 100 μM. The proposed assay can be serviced as a sensitive biosensor for the determination of AA in aqueous solutions due to its simple detection procedure, fast operation, and high sensitivity.
  • Publication
    A numerical study on induced flowrate and thermal efficiency of a solar chimney with horizontal absorber surface for ventilation of buildings
    ( 2020)
    Y.Q. Nguyen
    ;
    J.C. Wells
    Solar chimneys absorb solar radiation heat to create stack effect which induces airflow for natural ventilation of buildings. Solar chimneys have been studied mainly in two forms: vertical air channel and inclined one. In this paper, a solar chimney with a horizontal absorber surface was proposed. Its performance in term of the induced air flowrate through the channel and the thermal efficiency was predicted by a CFD (Computational Fluid Dynamic) model. Examined factors included the heat flux and major dimensions of the chimney: length of the absorber surface, gap of the air channel, and height and width of the inlet and outlet sections. The results show that increasing of all examined factors enhances the flowrate but has minor effect on the thermal efficiency. However, excessive large outlet width results in reduction of the flowrate and thermal efficiency due to appearance of reverse flow at the outlet.
  • Publication
    A proposed model for “Competition” factor as moderator on the influence to English language learning quality of students - A Case of higher education in Vietnam
    ( 2021)
    Le Thi Ngoc Diep
    ;
    Tran Chi Hieu
    ;
    Vu Minh Hieu
    Resulting from the Industrial Revolution 4.0, English is evolving into a global language and is detected from multi-aspects consisting of technological, scientific, and business aspects, and completely, English language learning quality must be enhanced. Thus, this paper focuses on constructing a conceptual framework in which competition is presenting as a moderator on the influence on the English language learning quality of students in the context of higher education in Vietnam. To achieve this objective, the paper employs a qualitative approach through tools of the meta-analysis, systematic review, from 86 publications as research papers, theses/ dissertations, books, and other relevant publications in the focused subject from prominent and reliable databases, including Google Scholar, Research Gate, Scopus, Web of Science, EBSCO, Cengage and Springer, etc. and direct observation with 55 English language classes, 5 interviews are conducted by using a semi-structured questionnaire with 135 students and 55 lecturers and 5 educational/ English teaching experts. The paper hopes to contribute to English learning quality enhancement and extends its contribution to the educational quality in higher education.
  • Publication
    A Review of Dynamic Capabilities, Innovation Capabilities, Entrepreneurial Capabilities and Their Consequences
    ( 2020)
    Hieu Minh VU
    The paper proposes a conceptual model which provides direction for researchers to empirically establish the connections between dynamic capabilities, innovation capabilities, entrepreneurial capabilities and financial and strategic performance. The author uses systematic literature review process to select the articles used in this study. First, the present paper review and discuss some major contributions to the theories of dynamic capabilities, innovation capabilities, entrepreneurial capabilities and their consequences. The author seeks to highlight different understandings of the concepts to clarify the distinctions between them. Second, the conceptual model and propositions for future studies were developed. The proposed model highlights the different measures of dynamic capabilities, innovation capabilities, entrepreneurial capabilities and their consequences. The model with its associated propositions was developed base on limitations and gaps observed from past studies. It is focused on empirically testing the direct impact of dynamic capabilities, innovation capabilities, and entrepreneurial capabilities on the performance of SMEs in Vietnam. Nevertheless, the proposed model can be applied to similar situations in different contexts and countries. Further empirical testing of proposed model would contribute to enriching existing knowledge of dynamic capabilities, innovation capabilities and entrepreneurial capabilities within SMEs and how these capabilities foster superior performance.
  • Publication
    A second-order dynamical system for equilibrium problems
    ( 2022)
    Le Van Vinh
    ;
    Van Nam Tran
    ;
    Phan Tu Vuong
    We consider a second-order dynamical system for solving equilibrium problems in Hilbert spaces. Under mild conditions, we prove existence and uniqueness of strong global solution of the proposed dynamical system. We establish the exponential convergence of trajectories under strong pseudo-monotonicity and Lipschitz-type conditions.We then investigate a discrete version of the second-order dynamical system, which leads to a fixed point-type algorithm with inertial effect and relaxation. The linear convergence of this algorithm is established under suitable conditions on parameters. Finally, some numerical experiments are reported confirming the theoretical results.
  • Publication
    A Self-Adaptive Step Size Algorithm for Solving Variational Inequalities with the Split Feasibility Problem with Multiple Output Sets Constraints
    ( 2022)
    Tran Luu Cuong
    ;
    Tran Viet Anh
    ;
    Le Huynh My Van
    In this paper, we investigate the problem of solving strongly monotone variational inequality problems over the solution set of the split feasibility problem with multiple output sets in real Hilbert spaces. The strong convergence of the proposed algorithm is proved without knowing any information of the Lipschitz and strongly monotone constants of the mapping. In addition, the implementation of the algorithm does not require the computation or estimation of the norms of the given bounded linear operators. Special cases are considered. Finally, a numerical experiment has been carried out to illustrate the proposed algorithm.