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Surface Mapping of Resistive Switching CrO_x Thin Films

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Advances in Materials Physics and Chemistry 2016年第3期6卷 21-27页

作者： Kim ngoc Pham Kieu Hanh Thi Ta Lien Thuong Thi Nguyen Vinh Cao tran Bach Thang Phan Faculty of Materials Science University of Science Vietnam National University Ho Chi Minh City Vietnam Faculty of Resources and Environment Thu Dau Mot University Binh Duong City Vietnam Laboratory of Advanced Materials University of Science Vietnam National University Ho Chi Minh City Vietnam

In this work, we investigated resistive switching behavior of CrOx thin films grown by using sputtering technique. Conventional I-V measurements obtained from Ag/CrOx/Pt/Ti/SiO2/Si structures depict the bipolar switching behavior, which is controlled by formation/dissolution processes of Ag conducting filaments through electrochemical redox reaction under external electric field driven. Conductive atomic force microscopy (C-AFM) technique provides the valuable mapping images of existing Ag filaments at low resistance state as well as the characteristics of filament distributions and diameters. This study also reveals that where the higher amplitude of topography is, the easier possibility of forming conducting filament paths is on CrOx surface films.

关键词： Resistive Switching Chromium Oxide C-AFM Surface Mapping Metal Filament

Physical Examination Indicated Rescue Cerclage to Improve Live Birth Rate at Hung vuong Hospital in Vietnam

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Open Journal of Obstetrics and Gynecology 2020年第3期10卷 400-408页

作者： Huynh Nguyen Khanh trang tran Thi ngoc Tam Pham Huynh Phuc Hung Hoang Thi Diem Tuyet Pham ngoc Thach University of Medicine HCMC Vietnam Hung vuong Hospital HCMC Vietnam

Emergency cerclage with advanced cervical dilatation and bulging of fetal membranes is still challenging to obstetricians.?Objective:?To identify the live birth rate after physical examination indicated rescue cerclage. Methods:?A retrospective cohort study of 36 pregnant women, who underwent rescue cerclage at Hung vuong hospital from January 2015 to January 2019. Selection criteria: cervical dilation 10 to 40 mm, at 20 to 30 gestational weeks. Exclusion criteria: multiple pregnancy, birth defects, pregnancy termination due to maternal or fetal indications. Results: Delivery of live infant rate was 72.22%;mean pregnancy prolongation was 42.8 ±?34.15 days. Early live birth rate was 77.78%. The percentage of delivery after 34 and 37 weeks was 44.45% and 27.78%, respectively. Live birth weight was 400 to 3600?g, with mean being 1878.06 ±?1049.04?g. No procedure-related complication was observed. Conclusions:?Rescue cerclage may be an effective and safe method in prolonging pregnancy and improving neonatal outcome in women with cervical dilation 10 to 40 mm. It should be considered as a viable option for women with a dilated cervix in 20 to 30 gestational weeks. Future controlled studies are needed.

关键词： Emergency Cerclage Delivery of Live Infant Rate

Ecological and behavioural risk factors of scrub typhus in central Vietnam:a case-control study

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Infectious Diseases of Poverty 2021年第4期10卷 97-97页

作者： Hanh Thi Duc tran Jan Hattendorf Hung Manh Do Thanh Tien Hoang Hang Thi Hai Hoang Hoa ngoc Lam Mai Kim Huynh Lan Thi Hoang vu Jakob Zinsstag Daniel Henry Paris Esther Schelling Department of Epidemiology and Public Health Swiss Tropical and Public Health InstituteBaselSwitzerland 不详

Background The risk factors for scrub typhus in Vietnam remain *** typhus caused by Orientia tsutsugamushi often presents as an undifferentiated febrile illness and remains under appreciated due to the limited availability of diagnostic *** tropical rickettsial illness is increasingly recognized as an important cause of non-malaria acute undifferentiated fever in *** study aimed to investigate behavioural and ecological related risk factors of scrub typhus to prevent this potentially life-threatening disease in *** We conducted a clinical hospital-based active surveillance study,and a retrospective residence-enrolment date-age-matched case–control study in Khanh Hoa province,Vietnam,from August 2018 to March *** examinations,polymerase chain reaction and enzyme-linked immunosorbent assay IgM tests were applied to define cases and *** enrolled participants filled out a questionnaire including demographic socio-economic status,personal behaviors/protective equipment,habitat connections,land use,and possible exposure to the *** conditional logistic regression was used to define the scrub typhus associated risk *** We identified 44 confirmed cases and matched them with 152 *** cases and controls,the largest age group was the 41–50 years old and males accounted for 61.4%and 42.8%,*** were similarities in demographic characteristics between the two groups,with the exception of *** factors were significantly associated with acquisition of scrub typhus,including sitting/laying directly on household floor[adjusted OR(aOR)=4.9,95%CI:1.6–15.1,P=0.006],household with poor sanitation/conditions(aOR=7.9,95%CI:1.9–32.9,P=0.005),workplace environment with risk(aOR=3.0,95%CI:1.2–7.6,P=0.020),always observing mice around home(aOR=3.7,95%CI:1.4–9.9,P=0.008),and use of personal protective equipment in the field(aOR=0.4,95%CI:0.1–1.1,P=0.076).Conclusions Ecological

关键词： Ecological Environmental Behaviour Risk factor Scrub typhus Orientia tsutsugamushi Vietnam

有氧条件下黄铁矿活化过硫酸盐降解水中对氯苯胺的研究

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有氧条件下黄铁矿活化过硫酸盐降解水中对氯苯胺的研究

作者：陈玉山（tran ngoc Son）华南理工大学

学位级别：硕士

氯苯胺是环境中常见的难降解有机污染物,在农药、医药、染料等化工领域有着广泛的应用,研究降解氯苯胺类化合物的方法与途径是污染物控制的热点问题之一。过硫酸盐活化技术是近年来发展起来的新型高级氧化技术,具有氧化能力强、pH使用... 详细信息

氯苯胺是环境中常见的难降解有机污染物,在农药、医药、染料等化工领域有着广泛的应用,研究降解氯苯胺类化合物的方法与途径是污染物控制的热点问题之一。过硫酸盐活化技术是近年来发展起来的新型高级氧化技术,具有氧化能力强、pH使用范围广的优点,其活化过程是该技术成功实施的关键。本论文研究有氧条件下黄铁矿活化过硫酸钠对废水中对氯苯胺(PCA)的降解过程,进一步探究了黄铁矿活化过硫酸钠的反应机理,并探讨了弱磁场和亚铁络合剂对活化降解的影响。主要研究内容及结果如下:(1)研究有氧条件下黄铁矿活化过硫酸钠降解PCA,在室温和中性条件下,通过比较通空气、通氮气和不通气条件下PCA的降解率,考察了体系中溶解氧对PCA降解的影响。结果表明:有氧条件有利于PCA的降解。在有氧条件下的黄铁矿/过硫酸盐体系中有超氧自由基(O2??)产生,且超氧自由基与过硫酸盐(S2O82?)反应产生硫酸自由基(SO4??),从而促进了PCA的降解。(2)研究了有氧条件下黄铁矿活化过硫酸钠降解PCA动力学过程,考察了黄铁矿投加量、初始pH、过硫酸钠浓度、反应温度对体系降解PCA的影响。随着FeS2的含量、PS初始浓度及温度增加PCA降解率升高,但PCA降解的效果随着pH初始值升高而降下。(3)研究了弱磁场对黄铁矿活化过硫酸钠降解PCA的影响,结果证明弱磁场促进了PCA的降解。(4)研究了在有氧条件下草酸、柠檬酸、乙二胺四乙酸(EDTA)对黄铁矿降解PCA的影响。结果发现在螯合剂浓度为0.05.5 mmol?L-1范围内,添加草酸、柠檬酸和EDTA促进了对氯苯胺的降解。

关键词：黄铁矿过硫酸盐硫酸自由基对氯苯胺降解

Compensation of Zn substitution and secondary phase controls effective mass and weighted mobility in In and Ga co-doped ZnO material

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Journal of Materiomics 2021年第4期7卷 742-755页

作者： Oanh Kieu Truong Le Anh Tuan Thanh Pham ngoc Kim Pham trang Huyen Cao Pham Truong Huu Nguyen Dung Van Hoang Hanh Kieu Thi Ta Dai Cao Truong Hoa Thi Lai Thuy Dieu Thi Ung Vinh Cao tran Thang Bach Phan aboratory of Advanced Materials University of ScienceHoChiMinh City700000Viet Nam Vietnam National University HoChiMinh City700000Viet Nam Faculty of Physics and Engineering Physics University of ScienceHoChiMinh City700000Viet Nam Faculty of Materials Science and Technology University of ScienceHoChiMinh City700000Viet Nam Center for Innovative Materials and Architectures(INOMAR) HoChiMinh CityViet Nam Institute of Materials Science Vietnam Academy of Science and TechnologyHanoi100000Viet Nam

Conductivity s and thermal conductivity k are directly related to carrier concentration while Seebeck coefficient S is inversely proportional to carrier ***,improving thermoelectric(TE)performance is ***,the first-time analysis of secondary phase-controlled TE performance in terms of density-of-state effective mass m*d,weighted mobility mw and quality factor B is discussed in ZnO *** results show that the secondary spinel phase Ga2O_(3)(ZnO)9 not only impacts on k but also on s and S at high temperature,while the effect of carrier concentration seem to be dominant at low *** the high-spinel-segregation sample,a compensation of dopant atoms from the spinel to substitutional sites in the ZnO matrix at high temperature leads to a low decreased rate of temperaturedependent m**** compensation process also induces a band sharpening,a small mw reduction,and a large B *** a result,In and Ga co-doped ZnO bulk with the highest spinel segregation achieves the greatest PF improvement by 112.8%,owing to enhanced Seebeck coefficient by 110%as compared to the good Zn-substitution sample.

关键词： Thermoelectrics In and Ga co-Doped ZnO Secondary phase Zn substitution DOS effective Mass Weighted mobility

Assessment of Growth and Productivity on Four Black Pepper Varieties (<i>Piper nigrum</i>L.) in Three Target Provinces of Vietnam

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Engineering（科研） 2021年第12期13卷 647-655页

作者： Duong Thi Oanh Nguyen Van Long Nguyen Quang ngoc tran Thi Dieu Hien Pham Thi Hoai Nguyen Ba Huy Pepper Research and Development Centre Pleiku City Viet Nam

Black pepper varieties, namely “Vinh Linh”, “Lada”, “An Do” and “Loc Ninh” were planted in three different ecological regions: Dak Lak, Gia Lai and Dong Nai in order to compare the growth ability, productivity, and quality of peppercorn. The experiments were designed in the Randomized Complete Block Design (RCBD) with four replications. The results of study have been indicated that “Vinh Linh” and “Lada” both varieties performed better crucial parameters of growth, productivity and yield, after 36 months planted. Although having greater growth parameter in the location of Dong Nai province, four varieties showed lower yield than other regions. By contrast, the four pepper types achieved the highest yield in Gia Lai, followed by Dak Lak. With respect to peppercorn quality, “Vinh Linh”, “Loc Ninh” and “Lada” achieved requirements of Vietnamese Standard (TCVN 7036:2008) including bulk density: 535.69 - 612.72 g/l;piperine: 4.06 - 4.31 g/100g and volatile oil at 2.72 - 3.16 ml/100g. In contrast, “An Do” variety presented the poorest level of piperine (3.78 g/100g), and unachieved requirements.

关键词： Pepper Varieties Growth Yield Ecology Vietnam

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太虚法师与近代越南佛教振兴运动

太虚法师与近代越南佛教振兴运动

作者：胡陈黎玉（HO tran LE ngoc）福建师范大学

学位级别：硕士

太虚法师对近代越南佛教振兴运动的影响,表现在这场运动是受到太虚法师领导的中国佛教振兴运动的主要内容影响的,如其中的“佛教的三大革命”和“人间佛教”思想,在越南佛教振兴运动中均被接受,且成为了改革目标。本文选择太虚法师与近... 详细信息

太虚法师对近代越南佛教振兴运动的影响,表现在这场运动是受到太虚法师领导的中国佛教振兴运动的主要内容影响的,如其中的“佛教的三大革命”和“人间佛教”思想,在越南佛教振兴运动中均被接受,且成为了改革目标。本文选择太虚法师与近代越南佛教振兴作为研究对象,首先,以探析20世纪初越南佛教振兴运动为始,论述当时的国际背景以及中越社会背景,介绍越南佛教振兴运动的概况;继而探讨太虚法师对近代越南佛教运动振兴之影响,如《人间的思想》报纸中的思想要素,尤其是太虚法师所提倡“佛教的三大革命”和爱国心等方面;再次,分析太虚对越南佛教振兴运动的一些基本内容的影响;最后,揭示越南佛教振兴运动对当代的作用。希望藉此研究能帮助越南学僧关注这一振兴过程,了解越南佛教振兴运动是受中国佛教振兴运动影响的,而其中太虚的思想影响最为深刻。

关键词：太虚法师近代越南佛教振兴运动

女性文化程度对夫妻劳动分工的影响研究 ——以越南河内市为例

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女性文化程度对夫妻劳动分工的影响研究 ——以越南河内市为例

作者：陈氏玉梅(tran Thi ngoc Mai) 华东师范大学

学位级别：硕士

市场机制的激烈竞争要求劳动者更灵活,才能达到更好的工作效果,获得更多的利益。这些要素是使妇女脱离家庭的巨大吸引力,让她们能够参与到社会的各个领域。因此妇女在家庭中的任务与角色与其在社会中的工作发生了矛盾冲突,甚至越来越紧... 详细信息

市场机制的激烈竞争要求劳动者更灵活,才能达到更好的工作效果,获得更多的利益。这些要素是使妇女脱离家庭的巨大吸引力,让她们能够参与到社会的各个领域。因此妇女在家庭中的任务与角色与其在社会中的工作发生了矛盾冲突,甚至越来越紧张。近期,越南有关“妇女与性别平等”的社会学研究认为,越南妇女未得到平等是因为受教育水平较低。在本研究中,我通过深入访谈和问卷调查的方法来了解教育水平对河内地区家庭中夫妻间分工劳动的影响。研究指出实际上存在着以下几个问题：1.在现代越南家庭中,夫妻关系越来越平等,夫妇一起工作、一起决定家庭事务的比例有所增加;在城市中,男子参与做家务、照顾小孩的比例高于农村。但是,妇女的地位及其重要性还是没有大的改变,大部分妇女仍主要从事做家务、照顾孩子及老人等工作。2.妇女的知识不一定会影响夫妻之间的劳动分工。妻子的知识水平不同,家务劳动的分工模型几乎没有太大的差别。不过在生产领域、对家庭收入的贡献、决定是否生孩子以及使用何种避孕方法等方面,妇女受教育水平越高,影响程度越大。3.在家务分工领域,传统观念这一因素是最具支配作用的,甚至超过了知识因素。拥有高学历的妇女在性别平等上还保留着传统观念。4.妇女在性别平等方面的知识还很有限,拥有高学历的妇女并未真正意识到这个问题。5.宣传、法律、大众通信等各因素在提高男女平等和夫妻劳动分工方面还没有真正地达到预期效果。

关键词：性别平等家庭妇女劳动分工教育

Characteristics of Suspended Particulate Matter and the Coastal Turbidity Maximum Areas of the Mekong River

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Journal of Environmental Science and Engineering(A) 2015年第2期4卷 67-78页

作者： vu Duy Vinh tran Anh Tu tran Dinh Lan Nguyen ngoc Tien Institute of Marine Environment and Resources Vietnam Academy of Science and Technology Haiphong 35999 Vietnam Institute of Marine Geology and Geophysics Vietnam Academy of Science and Technology Hanoi 10999 Vietnam

This paper presents the results of application of a 3D (three-dimensional) numerical model to study on MTZ (maximum turbidity zone) in the coastal zone of Mekong River Delta. In this study, a 3D system model with combination of hydrodynamics—-wave and suspended sediment transport was set up and validated with measured data in the study area. Based on calculated scenarios for the flood and the dry season, the results have shown appearance of MTZs in the coastal zone of Mekong River with suspended sediment concentration prevalent of 0.04-0.07 kg·m-3 (the dry season) and 0.05-0.1 kg·m-3 (the flood season). The position and MTZs scale change with the interaction between fresh water and tidal oscillations. The MTZ occur more in the dry seasons compared to the wet season. The MTZs are prevalent located far away from estuaries about in 12-22 km (in the dry season), and 5-15 km in the flood season.

关键词：最大浑浊带湄公河悬浮颗粒物沿岸悬浮泥沙浓度三维系统悬移质泥沙沿海地带