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Hepatitis B vaccination status and associated factors among health science students

Asian Pacific Journal of Tropical Medicine 2023年第5期16卷 213-219页

作者： Binh thanh Nguyen Lan Y Vo Tap Van Nguyen Minh Cong Vo Tinh Dang pham Han Thi Ngoc Nguyen Lynda Boyer-Chu Giao Huynh Faculty of Medicine Tra Vinh UniversityTra Vinh CityTra Vinh ProvinceVietnam Faculty of Public Health University of Medicine and Pharmacy at Ho Chi Minh CityHo Chi Minh CityVietnam Faculty of Medical Management Nguyen Tat Thanh UniversityHo Chi Minh CityVietnam Department of Ear Nose Throat-Head and Neck Surgery FV hospitalHo Chi Minh CityVietnam Department of Anaesthesia and Intensive Care FV hospitalHo Chi Minh CityVietnam Infection Control Department University Medical Center Ho Chi Minh CityHo Chi Minh CityVietnam San Francisco Unified School District San FranciscoCaliforniaUSA

Objective:To evaluate hepatitis B virus(HBV)vaccine coverage and its associated factors among health science students in ***:This cross-sectional study involving 459 health science students at Tra Vinh University was conducted between April and June *** were collected using a structured questionnaire with items on sociodemographic characteristics,knowledge and attitude about HBV,and vaccination status.A multivariable logistic regression model was used to explore the factors associated with vaccination ***:The majority of participants were female(65.8%)and enrolled at the medical school(56.2%).A total of 30.3%participants received the full dose of the HBV *** percentages of participants with sufficient knowledge and positive attitudes toward HBV infection were 75.2%and 43.4%,*** was 11.8 times higher in sixth-year medical students than any healthcare student in their first-year[adjusted odds ratio(aOR)11.8,95%CI 3.1-45.1,P<0.001],and the coverage was also significant higher in those who had sufficient knowledge(aOR 2.0,95%CI 1.1-3.9,P<0.05)and positive attitudes(aOR 3.0,95%CI 1.9-4.8,P<0.05)than in their ***:The majority of students were not fully vaccinated against HBV,indicating they were vulnerable to the *** and authorities should reinforce health education messages aimed at encouraging all students to get vaccinated with the HBV vaccine,enhance their awareness and knowledge of HBV,and improve attitudes toward HBV infection prevention.

关键词： Hepatitis B Knowledge Attitude Practice Vaccination Students

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Hydrogen roles approaching ideal electrical and optical properties for undoped and Al doped ZnO thin films

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Journal of Materiomics 2022年第1期8卷 123-135页

作者： Dung Van Hoang Nam Hoang Vu Nga Thi Do Anh Tuan thanh pham Truong Huu Nguyen Jer-Lai Kuo Thang Bach Phan Vinh Cao Tran Laboratory of Advanced Materials University of ScienceHoChiMinh City700000Viet Nam Vietnam National University HoChiMinh City700000Viet Nam HoChiMinh City Institute of Physics HoChiMinh City700000Viet Nam Institute of Atomic and Molecular Sciences Academia SinicaTaipei10617Taiwan Center for Innovative Materials and Architectures(INOMAR) HoChiMinh City700000Viet Nam Faculty of Materials Science&Technology University of ScienceHoChiMinh City700000Viet Nam

This paper distinguished hydrogen roles to improve electron mobility and carrier concentration in ZnO and Al doped ZnO sputtered *** combining experimental evidences and theoretical results,we find out that hydrogen located at oxygen vacancy sites(H_(O))is the main factor gives rise to increase simultaneously mobility and carrier concentration which has not been mentioned *** appropriate hydrogen content during sputtering not only results in crystalline relaxation but also supports doping Al into ZnO,increasing carrier concentration and electron mobility in the *** principles calculations confirmed hydrogen substitutional stability for oxygen vacancy,significantly reducing electron conductivity effective mass and hence increasing electron *** particular,0.8%hydrogen partial pressure ratio achieved 61 cm^(2)V^(-1)s^(-1)maximum electron mobility,optical transmittance above 82%in visible and near-infrared regions,and 2×10^(20) cm^(-3)carrier concentrations for H-Al co-doped ZnO *** values approach ideal electrical and optical properties for transparent conducting oxide *** presence of one maximum electron mobility was attributed to competition between increasing mobility due to restoring effective electron mass and hydrogen passivation of native defects,and decreased electron mobility due to electron-phonon scattering.

关键词： High electron mobility Hydrogen roles Passivation effects Effective electron mass DFT calculations Doped ZnO thin Film

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Dynamic analysis of bio-inspired helicoid laminated composite plates resting on Pasternak foundation excited by explosive loading

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Defence Technology（防务技术） 2023年第12期30卷 126-140页

作者： Ngoc-Tu Do Quoc-Hoa pham Faculty of Mechanical Engineering Hanoi University of IndustryHanoiViet Nam Faculty of Engineering and Technology Nguyen Tat Thanh UniversityHo Chi Minh CityViet Nam

This paper uses isogeometric analysis(IGA)based on higher-order shear deformation theory(HSDT)to study the dynamic response of bio-inspired helicoid laminated composite(B-iHLC)plates resting on Pasternak foundation(PF)excited by explosive *** takes advantage of non-uniform rational Bspline(NURBS)basic functions to exactly represent the structure geometry models and the attainment of higher-order approximation *** method also ensures a C1 continuous function in the analysis of transverse shear deformation via ***,IGA eliminates the requirement for correction factors and delivers accurate *** foundation with two stiffness parameters:springer stiffness(k_(1))and shear stiffness(k_(2)).The derivation of the governing equations is based on Hamilton's *** proposed method is validated through numerical examples.A comprehensive analysis of the impact of geometrical parameters,material properties,boundary conditions(BCs),and foundation stiffness on dynamic response of B-i HLC plates is carried out.

关键词： Isogeometric analysis Pasternak foundation Dynamic response Laminated composite

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Fundraising Capacity of HIV/AIDS Community-Based Organizations in 3 Years (2017-2019) in Ho Chi Minh City, Vietnam

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World Journal of AIDS 2020年第3期10卷 186-194页

作者： Tran Chi thanh pham Duc Trinh Nguyen Duc thanh Linus Olson Mattias Larsson Nguyen Tat thanh University HCMC Vietnam Dinh Tien Hoang Institute of Medicine Hanoi Vietnam College of Foreign Economic Relation HCMC Vietnam Hanoi University of Public Health Hanoi Vietnam Department of Women’s and Children’s Health Karolinska Institutet Stockholm Sweden Department of Global Public Health Karolinska Institutet Stockholm Sweden

HIV/AIDS is still an important public health issue in Vietnam and other developing countries. In Vietnam, Community-based organizations (CBOs) were officially considered as the key partners to approach vulnerable groups at high risks of HIV infection since 2010. Funds for HIV/AIDS prevention and control are facing difficulties due to rapid reduction by international organizations, while domestic funding has not yet met the demand, especially funding for prevention and communication activities. Our study aimed to assess the fundraising capacity of several CBOs in Ho Chi Minh City, Vietnam and analyze the challenges that they are facing now and in future in their work of HIV/AIDS management for community. The 03 typical and representative CBOs (G3VN, Smile and Strong Ladies) were chosen in our cross-sectional descriptive study. The electronic questionnaire was about fundraising reports over 3 years (2017-2019), organization structure (staff, mission, strategies) and the advantages and disadvantages in fundraising. Funds received over the year increased in total, but unstable in each projects. To have more funds, CBOs must invest time and money to have professional staff in fundraising and writing proposals. To meet requirement and survive, some CBO shifted to social enterprises and faced many difficulties in laws when being treated like profit companies. In Vietnam context, the key challenges which affect the role of funding are including: 1) Legal status;2) Small scale;3) Capacity of fundraising (finding calls, writing competence proposals);4) Fewer funds on HIV/AIDS. In future, we should pay attention in scaling up and building fundraising capacity for CBOs in order to help them in applying for international funds in community projects or even in HIV/AIDS research for CBOs, social enterprises in the context of funds for nation-level phased out of Vietnam.

关键词： CBO HIV/AIDS Fundraising Ho Chi Minh City Vietnam

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Viral co-infections among children with confirmed measles at hospitals in Hanoi,Vietnam,2014

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Asian Pacific Journal of Tropical Medicine 2017年第2期10卷 164-167页

作者： Hang Le Khanh Nguyen Loan Phuong Do Van thanh Thi Trieu Son Vu Nguyen Phuong Vu Mai Hoang Hien Thi pham thanh Thi Le Huong Thi Thu Tran Cuong Duc Vuong Mai Thi Quynh Le National Institute of Hygiene and Epidemiology No 1-Yesrsin streetHanoiVietnam

Objective:To characterize viral co-infections among representative hospitalized measles cases during the 2014 Hanoi ***:Throat swabs were collected from 54 pediatric patients with confirmed measles,and molecular diagnostics performed for 10 additional viral respiratory pathogens(Influenza A/H1N1pdm09;A/H3N2 and influenza B;Parainfluenza 1,2,3;Respiratory Synctial Virus,RSV;human Metapneumovirus,hM PV;Adenovirus and Picornavirus).Results:Twenty-one cases(38.9%) showed evidence of infection with other respiratory viruses:15 samples contained measles plus one additional virus,and 6 samples contained measles plus 2 additional *** was detected as a predominant cause of co-infections(13 cases;24.1%),followed by RSV(6 cases;11.1%),A/H1N1pdm09(3 cases;5.6%),PIV3(3 cases;3.7%),Rhinovirus(3 cases;3.7%) and hM PV(1 case;1.96%).Conclusions:Viral co-infections identified from pediatric measles cases may have contributed to increased disease severity and high rate of fatal *** treatment of measles cases may require control of multiple viral respiratory pathogens.

关键词： Measles virus Respiratory viruses Co-infection

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Prediction of Flash Flood Susceptibility of Hilly Terrain Using Deep Neural Network:A Case Study of Vietnam

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Computer Modeling in Engineering & Sciences 2023年第6期135卷 2219-2241页

作者： Huong Thi thanh Ngo Nguyen Duc Dam Quynh-Anh Thi Bui Nadhir Al-Ansari Romulus Costache Hang Ha Quynh Duy Bui Sy Hung Mai Indra Prakash Binh Thai pham University of Transport Technology Hanoi100000Vietnam Department of Civil Environmental and Natural Resources EngineeringLulea University of TechnologyLulea97187Sweden Department of Civil Engineering Transilvania University of BrasovBrasov500152Romania Danube Delta National Institute for Research and Development Tulcea820112Romania Departement of Geodesy and Geomatics National University of Civil EngineeringHanoi100000Vietnam Faculty of Hydraulic Engineering National University of Civil EngineeringHanoi100000Vietnam DDG(R)Geological Survey of India Gandhinagar382010India

Flash floods are one of the most dangerous natural disasters,especially in hilly terrain,causing loss of life,property,and infrastructures and sudden disruption of *** types of floods are mostly associated with landslides and erosion of roads within a short *** of Vietnamis hilly and mountainous;thus,the problem due to flash flood is severe and requires systematic studies to correctly identify flood susceptible areas for proper landuse planning and traffic *** this study,three Machine Learning(ML)methods namely Deep Learning Neural Network(DL),Correlation-based FeatureWeighted Naive Bayes(CFWNB),and Adaboost(AB-CFWNB)were used for the development of flash flood susceptibility maps for hilly road section(115 km length)of National Highway(NH)-6 inHoa Binh province,*** the proposedmodels,88 past flash flood events were used together with 14 flash floods affecting topographical and geo-environmental *** performance of themodels was evaluated using standard statisticalmeasures including Receiver Operating Characteristic(ROC)Curve,Area Under Curve(AUC)and Root Mean Square Error(RMSE).The results revealed that all the models performed well(AUC>0.80)in predicting flash flood susceptibility zones,but the performance of the DL model is the best(AUC:0.972,RMSE:0.352).Therefore,the DL model can be applied to develop an accurate flash flood susceptibility map of hilly terrain which can be used for proper planning and designing of the highways and other infrastructure facilities besides landuse management of the area.

关键词： Flash flood deep learning neural network(DL) machine learning(ML) receiver operating characteristic curve(ROC) Vietnam

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外商直接投资对越南行业收入的影响与政策优化研究——以电力等六个行业为例

外商直接投资对越南行业收入的影响与政策优化研究——以电力等六...

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作者： pham Thi thanh Hoa 华南理工大学

学位级别：硕士

越南在近年来逐渐成为东南亚极具发展潜力的国家,尽管受新冠肺炎疫情影响增速下滑,但仍是世界上实现经济正增长的国家之一。目前,越南依然是一个中低收入的国家,所以国家的发展还必须依靠朝阳产业的发展。由于政府的资金有限,所以朝阳... 详细信息

越南在近年来逐渐成为东南亚极具发展潜力的国家,尽管受新冠肺炎疫情影响增速下滑,但仍是世界上实现经济正增长的国家之一。目前,越南依然是一个中低收入的国家,所以国家的发展还必须依靠朝阳产业的发展。由于政府的资金有限,所以朝阳产业发展的过程中很大程度需要依靠外商直接投资来促进行业的发展。外商直接投资会对国内居民的收入造成影响,而且这种影响在各行业、各地区均存在差异。本文主要研究外商直接投资规模对越南重点行业、重点省份的外资企业的从业人员的收入水平的影响。首先,本文通过越南外商直接投资发展现状、越南六大重点行业发展现状进行阐述,然后通过实证分析研究外商直接投资对越南六大代表行业(电力行业、交通行业、制造业、软件与信息技术服务业行业、建筑行业及房地产行业)的影响。为使得研究更加深入,本文还对越南国六大省份展开实证研究,以六大省份(北部选取河内(H(?)N(?)i),海防(H(?)i Ph(?)ng),北宁(B(?)c Ninh)三大省份,南部选取胡志明(H(?)Ch(?)Minh),铜奈((?)ng Nai),平阳(B(?)nh D(?)ng)三大省份)的居民收入水平为样本,研究其是否受到外商直接投资的影响以及该影响的地区差异。结论认为,从行业、地区整体来看,外商直接投资能促进工资收入水平,但结构性差异也是存在的。其中,对于不同行业来说,外商直接投资提高了电力行业、交通行业、软件行业、建筑业的工资收入水平。而制造业的工资收入与外商直接投资呈现反方向变动关系。此外,外商直接投资在房地产行业并不能促进工资收入的提高,二者间无关系。对于越南不同地区来说,南部省份收入水平受到外商直接投资的贡献作用大于北部省份。最后本文得出实证分析的结果,提出具有针对性的政策建议。

关键词：外商直接投资收入分配政策优化

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Applied theory of bending vibration of the piezoelectric and piezomagnetic bimorph

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Journal of Advanced Dielectrics 2020年第3期10卷 72-76页

作者： Do thanh Binh V.A.Chebanenko Le Van Duong E.Kirillova pham Manh Thang A.N.Soloviev Department of Theoretical and Applied Mechanics Don State Technical University No.1 Gagarin sq.Rostov-on-Don 344000Russia Southern Scientific Center of RAS No.41 Chekhov AvenueRostov-on-Don 344006Russia Department of Construction Machinery Le Quy Don Technical University No.236 Hoang Quoc Viet str.Hanoi 100000Vietnam RheinMain University of Applied Sciences Kurt-Schumacher-Ring 18 Wiesbaden 65197Germany Department of Engineering Mechanics and Automation Vietnam National University No.144 Xuan Thuy str.Hanoi 100000Vietnam Institute of Mathematics Mechanics and Computer Sciences Southern Federal UniversityNo.8AMilchakova St.Rostov-on-Don 344090Russia

Based on the variational principle,equations and boundary conditions for transverse steady vibrations of a bimorph consisting of a piezoelectric and piezomagnetic layers are *** results of calculations of natural freq... 详细信息

关键词： Energy harvesting piezoelectrics piezomagnetics applied theory

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The Optimal Stopping Time for Selling an Asset When It Is Uncertain Whether the Price Process Is Increasing or Decreasing When the Horizon Is Infinite

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American Journal of Operations Research 2018年第2期8卷 82-91页

作者： Nguyen Khac Minh Nguyen thanh Trung pham Van Khanh Thang Long Institute of Mathematics and Applied Science Hanoi Vietnam Faculty of Fundamental Science Military Academy of Logistics Hanoi Vietnam

Assume that we want to shell an asset with unknown drift but known that the drift is a two value random variable, and the initial distribution can be estimated. As time goes by, this distribution is updated and base on the probability of the drift takes the small one gives us the stopping rule. Research results show that the optimal strategy to sell the asset is if the initial probability that the drift receives a small value greater than a certain threshold then liquidates the asset immediately, otherwise the asset holder will wait until the probability of the drift receives a small value passing a certain threshold, it is the optimal time to liquidate the asset.

关键词： Optimal Stopping Time Incomplete Information Probability Process

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A New Method Combining Interior and Exterior Approaches for Linear Programming

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Journal of Mathematics and System Science 2015年第5期5卷 196-206页

作者： Nguyen Ngoc Chu pham Canh Duong Le thanh Hue Institute of Mathematics 18 Hoang Quoc Viet HanoL Vietnam. Center for Information Infrastructure Development Vietnamese Academy of Science and Technology 18 Hoang Quoc Viet HanoiVietnam. Faculty of lnformatics Technology University of Mining and Geology Hanoi Vietnam.

In this paper we present a new method combining interior and exterior approaches to solve linear programming problems. With the assumption that a feasible interior solution to the input system is known, this algorithm uses it and appropriate constraints of the system to construct a sequence of the so called station cones whose vertices tend very fast to the solution to be found. The computational experiments show that the number of iterations of the new algorithm is significantly smaller than that of the second phase of the simplex method. Additionally, when the number of variables and constraints of the problem increase, the number of iterations of the new algorithm increase in a slower manner than that of the simplex method.

关键词： Linear programming simplex method station cone.

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