Building human resources management capacity for university research: The case at four leading Vietnamese universities     

T. L. Huong Nguyen 《Higher Education》2016,71(2):231-251

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Introducing a tool to gauge curriculum quality under Sustainable Development Goal 4: The case of primary schools in Vietnam     

Hoang  Anh-Duc  Pham  Hiep-Hung  Nguyen  Yen-Chi  Nguyen  Le-Kim-Ngan  Vuong  Quan-Hoang  Dam  Minh Q.  Tran  Trung  Nguyen  Tien-Trung 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2020,66(4):457-485

International Review of Education - The purposes of the study presented in this article were twofold. One was to respond to the question: what makes a quality curriculum? within the framework of...  相似文献   

Local synthesis of carbon nanotubes for direct integration in Si microsystems - design considerations     

Knut  E.  Aasmundtveit Bao  Quoc Ta  Quoc-Huy Nguyen  Tormod  B.  Haugen Nils  Hoivik Einar  Halvorsen 《上海大学学报(英文版)》2013,(3):218-225

The integration of nanomaterials such as carbon nanotubes （CNTs） into microsystems is highly desirable, in order to make use of the unique nanomaterial properties in real devices. However, the CNTtomicrosystem integration is challenging to implement in a manufacturable, cost effective industrial process. This paper presents our work towards a process for making complete, integrated CMOS / MEMS systems with integrated CNT. We demonstrate the feasibility of the process, using roomtemperature process ing, lowcost equipment and consumables, and electrical control with automation possibilities. CNTs are directly integrated at the desired positions in the Si microsystem, forming closed Si / CNT / Si circuits. We explore different designs with the aim to obtain uniform and welldefined CNT synthesis conditions, and show that simplified designs can perform comparably to more complex ones. The Si / CNT / Si circuits obtained can show rectifying （Schottky like） or nearohmic behavior. Gas sensing possibilities are demonstrated, indicating the possibility of monitoring aging/ fermenting of food. Functionalization of CNTs is demon strated, using thermal evaporation of Sn and Pd, opening for selective and sensitive sensors for various gases and ana lytes. Detailed microscopic characterization of the obtained CNTs are presented.  相似文献   

Field tested milliliter-scale blood filtration device for point-of-care applications     

Max M. Gong  Brendan D. MacDonald  Trung Vu Nguyen  Kinh Van Nguyen  David Sinton 《Biomicrofluidics》2013,7(4)

In this paper, we present a low cost and equipment-free blood filtration device capable of producing plasma from blood samples with mL-scale capacity and demonstrate its clinical application for hepatitis B diagnosis. We report the results of in-field testing of the device with 0.8–1 ml of undiluted, anticoagulated human whole blood samples from patients at the National Hospital for Tropical Diseases in Hanoi, Vietnam. Blood cell counts demonstrate that the device is capable of filtering out 99.9% of red and 96.9% of white blood cells, and the plasma collected from the device contains lower red blood cell counts than plasma obtained from a centrifuge. Biochemistry and immunology testing establish the suitability of the device as a sample preparation unit for testing alanine transaminase (ALT), aspartate transaminase (AST), urea, hepatitis B “e” antigen (HBeAg), hepatitis B “e” antibody (HBe Ab), and hepatitis B surface antibody (HBs Ab). The device provides a simple and practical front-end sample processing method for point-of-care microfluidic diagnostics, enabling sufficient volumes for multiplexed downstream tests.  相似文献   

Sparsely distributed sliding mode control for interconnected systems     

Ahmadreza Argha  Li Li  Steven W. Su  Hung Nguyen 《Journal of The Franklin Institute》2018,355(14):6191-6214

This paper proposes a framework for the design of sparsely distributed output feedback discrete-time sliding mode control (ODSMC) for interconnected systems. The major target here is to develop an observer based discrete-time sliding mode controller employing a sparsely distributed control network structure in which local controllers exploit some other sub-systems’ information as well as its own local information. As the local controllers/observers have access to some other sub-systems’ states, the control performance will be improved and the applicability region will be widened compared to the decentralised structure. As the first step, a stability condition is derived for the overall closed-loop system obtained from applying ODSMC to the underlying interconnected system, by assuming a priori known structure for the control/observer network. The developed LMI based controller design scheme provides the possibility to employ different information patterns such as fully distributed, sparsely distributed and decentralised patterns. In the second step, we propose a methodology to identify a sparse control/observer network structure with the least possible number of communication links that satisfies the stability condition given in the first step. The boundedness of the obtained overall closed-loop system is analysed and a bound is derived for the augmented system state which includes the closed-loop system state and the switching function.  相似文献   

A head in virtual reality: Development of a dynamic head and neck model     

Ngan Nguyen  Timothy D. Wilson 《Anatomical sciences education》2009,2(6):294-301

Advances in computer and interface technologies have made it possible to create three‐dimensional (3D) computerized models of anatomical structures for visualization, manipulation, and interaction in a virtual 3D environment. In the past few decades, a multitude of digital models have been developed to facilitate complex spatial learning of the human body. However, there is limited empirical evidence to guide the development and integration of effective computer models for teaching and learning. The purpose of this article is to describe the development of a dynamic head and neck model with flexible displays (2D, 3D, and stereoscopic 3D) and interactive control features that can be later used to design and test the efficacy of computer models as a means of improving student learning. The model was created using computer tomography scans of a human cadaver. Anatomical structures captured on the scans were segmented into discreet areas, and then reconstructed in three‐dimensions using specialized software. The final model consists of 70 distinct anatomical structures that can be displayed in 2D, 3D, or stereoscopic 3D. In 3D mode, a mouse can be used to actively and continuously interact with the model by manipulating viewer orientation, altering surface transparency, superimposing 2D scans with 3D reconstructions, removing or adding structures sequentially, and customizing animated scenes to show complex anatomical pathways or relationships. Anat Sci Educ 2: 294–301, 2009. © 2009 American Association of Anatomists.  相似文献   

Passive optical separation and enrichment of cells by size difference     

Hoi SK  Kim VH  Huy NM  Sow CH  Ow YS  Bettiol AA 《Biomicrofluidics》2010,4(4):44111

A size-selective cell sorting microfluidic device that utilizes optical force is developed. The device consists of a three-dimensional polydimethylsiloxane microstructure comprised of two crossed microchannels in a three-dimensional configuration. A line shaped focused laser beam is used for automatic size-selective cell sorting in a continuous flow environment. As yeast cells in an aqueous medium are fed continuously into a lower channel, the line shaped focused laser beam is applied (perpendicular to the direction of flow) at the junction of the two crossed channels. The scattering force of the laser beam was employed to push cells matching specific criteria upward from one channel to another. The force depends on the size of the cells, the laser power, and the fluid flow speed. The variation in size of yeast cells causes them to follow different routes at the intersection. For flow speeds below 30 μm∕s, all yeast cells larger than 3 μm were removed from the main stream. As a result, a high purity sample of small cells can be collected at the outlet of bottom channel.  相似文献   

Oxygen plasma treatment for reducing hydrophobicity of a sealed polydimethylsiloxane microchannel     

Tan SH  Nguyen NT  Chua YC  Kang TG 《Biomicrofluidics》2010,4(3):32204

Rapid prototyping of polydimethylsiloxane (PDMS) is often used to build microfluidic devices. However, the inherent hydrophobic nature of the material limits the use of PDMS in many applications. While different methods have been developed to transform the hydrophobic PDMS surface to a hydrophilic surface, the actual implementation proved to be time consuming due to differences in equipment and the need for characterization. This paper reports a simple and easy protocol combining a second extended oxygen plasma treatments and proper storage to produce usable hydrophilic PDMS devices. The results show that at a plasma power of 70 W, an extended treatment of over 5 min would allow the PDMS surface to remain hydrophilic for more than 6 h. Storing the treated PDMS devices in de-ionized water would allow them to maintain their hydrophilicity for weeks. Atomic force microscopy analysis shows that a longer oxygen plasma time produces a smoother surface.  相似文献   

Pathways to resilience: how drawings reveal pre-service teachers’ core narratives underpinning their future teacher-selves     

Judith Dinham  Beryl Chalk  Susan Beltman  Christine Glass  Bich Nguyen 《Asia-Pacific Journal of Teacher Education》2017,45(2):126-144

For this study of teacher-identity, which is part of a larger research project on teacher resilience, preservice teachers were invited to draw “the kind of teacher you hope to become”. In this, our study recognises drawing as a semiotic system of meaning-making and communication. The drawings were examined in terms of the “stories” they told. Using an emergent design approach to the data, drawings were synthesised into categories that were distilled into theme clusters. A hermeneutic reading revealed the core identity narrative underpinning each teacher-identity story. This story was told in sociocultural terms, or constructed around functioning at work or couched in terms of personal validation and achievement. These core identity narratives signal what “matters” to preservice teachers’ sense of their teacher-selves. Since there is an observed correlation between teacher-identity and resilience, knowing what matters is a helpful basis for building resilience.  相似文献   

Subtractive Schooling and Identity: A Case Study of Ethnic Minority Students in Vietnam     

Trang Thi Thuy Nguyen  M. Obaidul Hamid 《Journal of Language, Identity & Education》2017,16(3):142-156

This article examines the impact of subtractive schooling, including language use in education, on the identity of a group of ethnic minority students in Central Highlands of Vietnam. Drawing on semistructured interview data, a deeper look is taken into the ways in which these students identify themselves with their languages, cultures, and social relations. Findings reveal that the subtractive power of the school language and the institutional milieu profoundly influenced their identity construction by creating the conditions for (a) the devaluation of their language and cultural identity as a consequence of the invasion of their sociocultural territory by the dominant language and culture and (b) the segregation and disunity that affected their identity construction through social relations. Although subtractive schooling apparently facilitated students’ integration into the mainstream, its invisible power forced them not only to integrate but also to bear the full burden of constructing new identities to adjust to the school environment and the mainstream society.  相似文献