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  • Tuan, Nguyen Anh  (73)
  • Unknown  (73)
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  • 1
    Online Resource
    Online Resource
    The Magnetic Casimir Effect between Two Parallel Ferromagnetic Plates
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2012
    In:  Communications in Physics Vol. 22, No. 2 ( 2012-07-01), p. 133-
    Details
    In: Communications in Physics, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 22, No. 2 ( 2012-07-01), p. 133-
    Abstract: In this work, we study theoretically the long-range magnetic interaction between two parallel ferromagnetic plates, which arises from the magnetic Casimir effect. The behavior of the interaction is discussed for two configurations when the magnetization is perpendicular or parallel to the plates. The dependence of the Casimir force and Casimir energy on different interplate distances D has been investigated. Results of numerical calculations for a cobalt system have been also presented.
    Type of Medium: Online Resource
    ISSN: 2815-5947 , 0868-3166
    URL: Issue
    URL: Article
    DOI: 10.15625/0868-3166-22-2
    DOI: 10.15625/0868-3166/22/2/1478
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2012
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  • 2
    Online Resource
    Online Resource
    Cost optimization of two-stage helical gearboxes with second stage double gear-sets
    OU Scientific Route ; 2021
    In:  EUREKA: Physics and Engineering , No. 6 ( 2021-11-18), p. 89-101
    Details
    In: EUREKA: Physics and Engineering, OU Scientific Route, , No. 6 ( 2021-11-18), p. 89-101
    Abstract: In practice, the cost of a gearbox plays a very important role in the trade. Therefore, reducing the cost of gearboxes is an important task not only when manufacturing the gearboxes but also when designing them. In order to reduce the cost of a gearbox, there are many solutions in which determining the optimal partial gear ratios of a gearbox is an effective measure. This is because it not only the size, the mass but also the cost of a gearbox depends greatly on the partial gear ratios. This work presents a method for calculating the cost function of two-stage helical gearboxes with second-stage double gear-sets based on the mass of the components that construct the gearbox. The cost objective function is minimized to achieve the optimal transmission ratios. Furthermore, screening experiments are carried out with nine important input parameters that have significant effects on the optimum transmission ratio of the second stage. These parameters are the total gearbox ratio, the coefficient of wheel face width of the first stage, coefficient of wheel face width of the second stage, the allowable contact stress of the first stage, the allowable contact stress of the second stage, the output torque, the cost of gearbox housing, the cost of gears, and the shaft cost. The experimental results of were analysed by using the Analysis of Variance (ANOVA) method with the help of Minitab 19 software. The results demonstrate that the effective weight of the input parameters and their interactions on the output response was investigated. Also, a regression model for computing the optimal transmission ratio of the second stage was proposed. This brings significance not only in the design process but also in manufacturing since the gearbox cost can decrease
    Type of Medium: Online Resource
    ISSN: 2461-4262 , 2461-4254
    URL: Article
    DOI: 10.21303/2461-4262.2021.001855
    Language: Unknown
    Publisher: OU Scientific Route
    Publication Date: 2021
    detail.hit.zdb_id: 3008316-3
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  • 3
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    Safety and immunogenicity of inactivated Japanese encephalitis vaccine derived from Vero cell. Phase III, double-blind, randomized, control trial (JECEVAX, VABIOTECH, Vietnam)
    Tap chi Y hoc du phong (Vietnam Journal of Preventive Medicine-VJPM) ; 2021
    In:  Tạp chí Y học Dự phòng Vol. 31, No. 4 ( 2021-06-18), p. 5-17
    Details
    In: Tạp chí Y học Dự phòng, Tap chi Y hoc du phong (Vietnam Journal of Preventive Medicine-VJPM), Vol. 31, No. 4 ( 2021-06-18), p. 5-17
    Abstract: Japanese encephalitis (JE) is one of the most important infectious disease in Southeast Asia and the Pacifc region and more than 3 billion people are living in endemic areas. The annual incidence is estimated to be 60,000 cases/year of which 15,000 deaths, 50% of the people survive with neurological sequelae. Since 1997, Vietnam has produced and used mouse brain - derived (MB) inactivated Japanese encephalitis vaccine (JEVAX®) for children 1 - 5 years of age under the Expanded programme on immunization (EPI). In 2006, VABIOTECH started the research and development of vero cell-derived inactivated JE vaccine (JECEVAX). The clinical trial phases I, II & IIB were conducted successfully and the phase III was completed in January 2019. The study participants included 655 healthy infants aged 9 - 24 months were immunized with JECEVAX testing vaccine, and JEVAX® control vaccine. The results showed that both vaccines were safe with good tolerability in children. The seroconversion rates of JECEVAX (n = 547) were 99.6 - 100%, compared with JEVAX® (n =108) were 99 - 100%. The GMT titer of JECEVAX and JEVAX® after the second dose was 2.07log and 2.02log after the third dose, the neutralizing antibody (PRNT50) increased to 3.04log and 3.19log respectively. The registration dossier with the MOH of Vietnam is being fnalized before scaling up the production to prevent JE disease with JECEVAX high qualifed second generation vaccine.
    Type of Medium: Online Resource
    ISSN: 0868-2836
    URL: Article
    DOI: 10.51403/0868-2836/2021/331
    Language: Unknown
    Publisher: Tap chi Y hoc du phong (Vietnam Journal of Preventive Medicine-VJPM)
    Publication Date: 2021
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  • 4
    Online Resource
    Online Resource
    Factors Influencing the Consumption Behaviour of Non-Alcoholic Drinks in Vietnam
    VNU University of Economics and Business ; 2022
    In:  VNU JOURNAL OF ECONOMICS AND BUSINESS Vol. 2, No. 3 ( 2022-06-23)
    Details
    In: VNU JOURNAL OF ECONOMICS AND BUSINESS, VNU University of Economics and Business, Vol. 2, No. 3 ( 2022-06-23)
    Abstract: The paper analyzes consumer behavior towards the choice between green tea and carbonated drinks. We collected 339 valid responses for our probit model. The results indicate six factors influencing the preference between the two types of drinks, with a decreasing impact as follows: age, sex, weekly expenditure for drinks, marital status, and the safety level of tea and carbonated drinks. This paper also shows that if customers’ age decreases by one unit, their preference for carbonated drinks will decrease by 10%; and male customers like carbonated drinks more than female customers. Hence, it provides an overview of the current consumption status of carbonated beverages and green tea, thereby assisting businesses in developing new products suitable for consumers’ tastes.
    Type of Medium: Online Resource
    ISSN: 2734-9845 , 2734-9845
    URL: Article
    DOI: 10.57110/jeb.v2i3.4632
    Language: Unknown
    Publisher: VNU University of Economics and Business
    Publication Date: 2022
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  • 5
    Online Resource
    Online Resource
    Factors Influencing the Consumption Behaviour of Non-Alcoholic Drinks in Vietnam
    VNU University of Economics and Business ; 2022
    In:  VNU JOURNAL OF ECONOMICS AND BUSINESS Vol. 2, No. 3 ( 2022-06-23)
    Details
    In: VNU JOURNAL OF ECONOMICS AND BUSINESS, VNU University of Economics and Business, Vol. 2, No. 3 ( 2022-06-23)
    Abstract: The paper analyzes consumer behavior towards the choice between green tea and carbonated drinks. We collected 339 valid responses for our probit model. The results indicate six factors influencing the preference between the two types of drinks, with a decreasing impact as follows: age, sex, weekly expenditure for drinks, marital status, and the safety level of tea and carbonated drinks. This paper also shows that if customers’ age decreases by one unit, their preference for carbonated drinks will decrease by 10%; and male customers like carbonated drinks more than female customers. Hence, it provides an overview of the current consumption status of carbonated beverages and green tea, thereby assisting businesses in developing new products suitable for consumers’ tastes.
    Type of Medium: Online Resource
    ISSN: 2734-9861 , 2734-9845
    URL: Article
    DOI: 10.25073/2588-1108/vnueab.4632
    Language: Unknown
    Publisher: VNU University of Economics and Business
    Publication Date: 2022
    detail.hit.zdb_id: 3122236-5
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  • 6
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    Online Resource
    ĐÁNH GIÁ KẾT QUẢ ĐIỀU TRỊ GÃY LIÊN MẤU CHUYỂN XƯƠNG ĐÙI BẰNG ĐINH TRIGEN INTERTAN TẠI BỆNH VIỆN CHẤN THƯƠNG CHỈNH HÌNH
    Institute of Community Health ; 2023
    In:  Tạp chí Y học Cộng đồng Vol. 64, No. 5 ( 2023-08-23)
    Details
    In: Tạp chí Y học Cộng đồng, Institute of Community Health, Vol. 64, No. 5 ( 2023-08-23)
    Abstract: Đặt vấn đề: Gãy liên mấu chuyển xương đùi là một trong những tổn thương thường gặp ở người lớn tuổi (90% gặp ở bệnh nhân trên 65 tuổi). Loại gãy này có tỉ lệ tử vong cao và gây ra những khiếm khuyết nặng nề về chức năng. Lựa chọn điều trị thông thường với gãy liên mấu chuyển xương đùi không vững bao gồm đinh đầu trên xương đùi chống xoay (PFNA) và đinh Trigen InterTan (IT). Với ưu điểm về cơ sinh học và tỉ lệ thất bại thấp, PFNA hoặc IT thường được lựa chọn sử dụng để điều trị gãy liên mấu chuyển xương đùi không vững và cho kết quả lâm sàng tốt. Đinh IT với thiết kế gồm 2 vít vùng chân cổ xương đùi với cơ chế tích hợp, cho phép nén ép dọc trục và chống xoay mảnh cổ chỏm xương đùi. Nhóm nghiên cứu chúng tôi đánh giá kết quả điều trị gãy liên mấu chuyển xương đùi bằng đinh Trigen InterTan tại Bệnh viện Chấn thương Chỉnh hình. Mục tiêu: Đánh giá kết quả điều trị gãy liên mấu chuyển xương đùi bằng đinh Trigen InterTan (IT) tại Bệnh viện Chấn thương chỉnh hình. Đối tượng và phương pháp: Nghiên cứu hồ cứu mô tả loạt ca. Chúng tôi thực hiện phẫu thuật 35 bệnh nhân được chẩn đoán gãy liên mấu chuyển xương đùi bằng đinh Trigen InterTan tại khoa Cấp cứu và khoa Chi dưới, Bệnh viện Chấn thương chỉnh hình, thời gian từ tháng 2/2021 đến tháng 8/2021, sau đó ghi nhận các đặc điểm về dịch tễ học, thời gian phẫu thuật, thời gian nằm viện, số lượng máu mất, số lượng máu cần truyền trong phẫu thuật, tỉ lệ lành xương và các biến chứng sớm và muộn liên quan đến đinh IT. Kết quả: Độ tuổi trung bình 70,97±16,97, thời gian phẫu thuật 70,97±10,59 phút, thời gian phẫu thuật trung bình 60 phút, thời gian nằm viện trung bình 7 ngày, lượng máu mất trung bình 160,86±72,8 ml, lượng máu cần truyền trong phẫu thuật trung bình 203,43 ± 189,29 ml, tỉ lệ lành xương chiếm 97,14%. Kết luận: Gãy liên mấu chuyển không vững được điều trị thành công với đinh IT ở bệnh nhân lớn tuổi. Nghiên cứu của chúng tôi cho thấy đinh IT cho kết quả lâm sàng về thời gian phẫu thuật, thời gian nằm viện, lượng máu mất trong phẫu thuật và tỉ lệ lành. Những nghiên cứu sâu hơn cần được thực hiện để chứng minh những kết quả ban đầu này.
    Type of Medium: Online Resource
    ISSN: 2354-0613
    URL: Issue
    URL: Article
    DOI: 10.52163/yhc.v64i5
    DOI: 10.52163/yhc.v64i5.776
    Language: Unknown
    Publisher: Institute of Community Health
    Publication Date: 2023
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  • 7
    Online Resource
    Online Resource
    Geometric Structure, Electronic Structure, and Spin Transition of Fe〈SUP〉2+〈/SUP〉 Spin-crossover Molecules
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2013
    In:  Communications in Physics Vol. 22, No. 4 ( 2013-01-10), p. 309-
    Details
    In: Communications in Physics, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 22, No. 4 ( 2013-01-10), p. 309-
    Abstract: We present a density functional study on the geometric structure, electronic structureand spin transition of a series of Fe2+ spin-crossover molecules, i.e., [Fe(abpt)2(NCS)2] (1),[Fe(abpt)2(NCSe)2] (2), and [Fe(abpt)2(C(CN)3)2] (3) with abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole in order to shed light on more about the dynamics of the spin-crossover phenomenon.All results presented in this study were obtained by using the exchange correlation PBE functional.For better accuracy, the hexadecapolar expansion scheme is adopted for resolving the charge densityand Coulombic potential. Our calculated results demonstrate that the transition between the low-spin (LS) and high-spin (HS) states of these Fe2+ molecules is accompanied with redistributionof atomic charge and reformation of molecular orbitals. These cause dierences in the kineticenergy, the electrostatic energy as well as the total energy between the LS and HS states. TheLS state is advantage in the kinetic energy in comparison to the HS state, while the HS state isadvantage in the electrostatic energy. Moreover, the coulomb attraction energy between the Fe2+ion and its surrounding anionic ions plays a crucial role for spin crossover occurring.
    Type of Medium: Online Resource
    ISSN: 2815-5947 , 0868-3166
    URL: Issue
    URL: Article
    DOI: 10.15625/0868-3166-22-4
    DOI: 10.15625/0868-3166/22/4/2365
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2013
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  • 8
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    Online Resource
    Corporate Governance Structures and Performance of Firms in Asian Markets: a Comparative Analysis Between Singapore and Vietnam
    Vilnius University Press ; 2016
    In:  Organizations and Markets in Emerging Economies Vol. 7, No. 2 ( 2016-12-30), p. 112-140
    Details
    In: Organizations and Markets in Emerging Economies, Vilnius University Press, Vol. 7, No. 2 ( 2016-12-30), p. 112-140
    Abstract: A cross-country comparative analysis of corporate governance structures and financial performance of publicly listed companies in Singapore and Vietnam, covering a four-year period from 2008 to 2011, is undertaken in this study. More specifically, the similarities and differences in the corporate governance structures and financial performance of the companies are compared and interpreted in the institutional context of each market. On an average basis, we find that the size, composition and diversity of the boards in these two markets are statistically significantly different. In contrast, there is no statistical evidence to reject the similarities in ownership structure, board leadership structure, and financial performance between the firms of the two markets. In addition, our comparative analysis on the corporate governance structures–financial performance nexus also reveals that the performance effects of corporate governance structures vary significantly between the two markets, thus supporting the view that the performance effects of corporate governance structures are country-specific. Our findings suggest that country-level characteristics should be captured when modelling the corporate governance–firm performance relationship in cross-country comparative corporate governance research.
    Type of Medium: Online Resource
    ISSN: 2345-0037 , 2029-4581
    URL: Article
    DOI: 10.15388/omee.2016.7.2.14210
    Language: Unknown
    Publisher: Vilnius University Press
    Publication Date: 2016
    detail.hit.zdb_id: 2576493-7
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  • 9
    Online Resource
    Online Resource
    On time fractional pseudo-parabolic equations with nonlocal integral conditions
    American Institute of Mathematical Sciences (AIMS) ; 2022
    In:  Evolution Equations & Control Theory Vol. 11, No. 1 ( 2022), p. 225-
    Details
    In: Evolution Equations & Control Theory, American Institute of Mathematical Sciences (AIMS), Vol. 11, No. 1 ( 2022), p. 225-
    Abstract: 〈p style='text-indent:20px;'〉In this paper, we study the nonlocal problem for pseudo-parabolic equation with time and space fractional derivatives. The time derivative is of Caputo type and of order 〈inline-formula〉〈tex-math id="M1"〉\begin{document}$ \sigma,\; \; 0〈\sigma〈1 $\end{document}〈/tex-math〉〈/inline-formula〉 and the space fractional derivative is of order 〈inline-formula〉〈tex-math id="M2"〉\begin{document}$ \alpha,\beta 〉0 $\end{document}〈/tex-math〉〈/inline-formula〉. In the first part, we obtain some results of the existence and uniqueness of our problem with suitably chosen 〈inline-formula〉〈tex-math id="M3"〉\begin{document}$ \alpha, \beta $\end{document}〈/tex-math〉〈/inline-formula〉. The technique uses a Sobolev embedding and is based on constructing a Mittag-Leffler operator. In the second part, we give the ill-posedness of our problem and give a regularized solution. An error estimate in 〈inline-formula〉〈tex-math id="M4"〉\begin{document}$ L^p $\end{document}〈/tex-math〉〈/inline-formula〉 between the regularized solution and the sought solution is obtained.〈/p〉
    Type of Medium: Online Resource
    ISSN: 2163-2480
    URL: Article
    DOI: 10.3934/eect.2020109
    Language: Unknown
    Publisher: American Institute of Mathematical Sciences (AIMS)
    Publication Date: 2022
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  • 10
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    Online Resource
    Building a Malware Detection System Based on a Machine Learning Method
    Blue Eyes Intelligence Engineering and Sciences Engineering and Sciences Publication - BEIESP ; 2020
    In:  International Journal of Innovative Technology and Exploring Engineering Vol. 9, No. 5 ( 2020-03-30), p. 1488-1493
    Details
    In: International Journal of Innovative Technology and Exploring Engineering, Blue Eyes Intelligence Engineering and Sciences Engineering and Sciences Publication - BEIESP, Vol. 9, No. 5 ( 2020-03-30), p. 1488-1493
    Abstract: Malware attacks are dangerous and difficult to detect and prevent. Therefore, the task of detecting signs of malware and alerting it for users or the system is very necessary today. One of the most effective malware detection approaches is applying machine learning or deep learning to analyze its behavior. There have been many studies and recommendations to analyze malicious behavior then combined with some sorting or clustering methods to find their signs. In this paper, we will propose a method to use machine learning to detect malicious signs based on their unusual behavior. Accordingly, in our research, we will conduct malicious analysis using static and dynamic analysis methods to detect abnormal behaviors and combine them with a supervised classification algorithm to the conclusion on malware behavior.
    Type of Medium: Online Resource
    ISSN: 2278-3075
    URL: Journal
    URL: Article
    DOI: 10.35940/ijitee
    DOI: 10.35940/ijitee.E2945.039520
    Language: Unknown
    Publisher: Blue Eyes Intelligence Engineering and Sciences Engineering and Sciences Publication - BEIESP
    Publication Date: 2020
    detail.hit.zdb_id: 2750974-6
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