Nguyen Thang - Academia.edu (original) (raw)

Papers by Nguyen Thang

International Journal of Training and Development, 2007

Vietnam provides a typical case of an emerging economy, which has attempted to develop the countr... more Vietnam provides a typical case of an emerging economy, which has attempted to develop the country and join the world economic mainstream with a highly agricultural base, large and young labour force, and a dynamically growing private sector. After a long period of quantitative growth, it is now focusing on achieving quality of development, with a view to balance economic growth and quality of life improvement for its population. Education has been chosen to be the key plank in the successful implementation of this strategy. This article reviews the general socio-economic background of the country, the high need for skilled labour, the structure of its educational system, the pitfalls at the high education level, and its strategy to overhaul the whole system in order to ensure quality from the input phase of the development process.

IEEE Transactions on Biomedical Engineering, 2008

The physical basis for breast tumor detection with microwave imaging is the contrast in dielectri... more The physical basis for breast tumor detection with microwave imaging is the contrast in dielectric properties of normal and malignant breast tissues. Confocal microwave imaging involves illuminating the breast with an ultra-wideband pulse from a number of antenna locations, then synthetically focusing reflections from the breast. The detection of malignant tumors is achieved by the coherent addition of returns from these strongly scattering objects. In this paper, we demonstrate the feasibility of detecting and localizing small ( 1 cm) tumors in three dimensions with numerical models of two system configurations involving synthetic cylindrical and planar antenna arrays. Image formation algorithms are developed to enhance tumor responses and reduce early-and late-time clutter. The early-time clutter consists of the incident pulse and reflections from the skin, while the late-time clutter is primarily due to the heterogeneity of breast tissue. Successful detection of 6-mm-diameter spherical tumors is achieved with both planar and cylindrical systems, and similar performance measures are obtained. The influences of the synthetic array size and position relative to the tumor are also explored.

Science of The Total Environment, 1999

Biological indicator organisms have been widely used for monitoring and banking purposes for many... more Biological indicator organisms have been widely used for monitoring and banking purposes for many years. Although the complexity of the interactions between organisms and their environment is generally not easily comprehensible, environmental quality assessment using the bioindicator approach offers some convincing advantages compared to direct analysis of soil, water, or air. Measurement of air particulates is restricted to experienced laboratories with access to expensive sampling equipment. Additionally, the amount of material collected generally is just enough for one determination per sampling and no multidimensional characterization might be possible. Further, fluctuations in air masses have a pronounced effect on the results from air filter sampling. Combining the integrating property of bioindicators with the world wide availability and particular matrix characteristics of air particulate matter as a prerequisite for global monitoring of air pollution is discussed. A new approach for sampling urban dust using large volume filtering devices installed in air conditioners of large hotel buildings is assessed. A first Ž . experiment was initiated to collect air particulates 300᎐500 g each from a number of hotels during a period of 3᎐4 months by successive vacuum cleaning of used inlet filters from high volume air conditioning installations reflecting average concentrations per 3 months in different large cities. This approach is expected to be upgraded and applied for global monitoring. Highly positive correlated elements were found in lichens such as KrS, ZnrP, the rare earth Ž . elements REE and a significant negative correlation between Hg and Cu was observed in these samples. The ratio Ž . of concentrations of elements in dust and Usnea spp. is highest for Cr, Zn and Fe 400᎐200 and lowest for elements Ž . such as Ca, Rb, and Sr 20᎐10 . ᮊ M. Rossbach 0048-9697r99r$ -see front matter ᮊ 1999 Elsevier Science B.V. All rights reserved. Ž . PII: S 0 0 4 8 -9 6 9 7 9 9 0 0 1 1 0 -2

Journal of Biosocial Science, 2003

This analysis used data, primarily from the 1997 Vietnamese Demographic and Health Survey (VN-DHS... more This analysis used data, primarily from the 1997 Vietnamese Demographic and Health Survey (VN-DHS 1997), to determine the changes in contraceptive use in Vietnam. A descriptive analysis of individual, household and community characteristics was made to obtain a general description of contraceptive use. Multinomial logistic regression analyses were also performed on the currently married in (a) a sample of all women and (b) only those women who live in rural areas, to identify the strength of association that each variable has with the use of modern contraceptives. The use of any contraceptive method and the use of modern methods increased from 1988 to 1997. The primary contraceptive method utilized is the IUD and its use has increased substantially from 1988 to 1997. Younger women (aged 15-24) were less likely to use any contraceptive method. Women not desiring additional children were significantly more likely to use contraceptive methods than those desiring more children. Education has a clear impact on both contraceptive knowledge and use by women, with higher educated women being more likely to use a contraceptive method. Illiterate women with no formal education were significantly less likely to use modern methods of contraception. Differentials in contraceptive use exist regarding place of residence. Urban women are more likely than rural women to use contraception, but the difference is not large. Women living in mountainous areas are less likely to use contraception, compared with women living in the lowlands. Living standards, especially the availability of electricity in the community, have a large effect on the methods of contraception adopted by women. Religion is not strongly related to the contraceptive behaviour of women. There were significant differences in the use of contraceptives in communities with good quality of care, with increased contraceptive use corresponding to the increase in availability of family planning workers at communes, provision of counselling services at health facilities, and the volume of mass media family planning messages.

Journal of Asian Earth Sciences, 2001

The Song Chay Massif is the northeasternmost metamorphic complex in Vietnam, to the east of the R... more The Song Chay Massif is the northeasternmost metamorphic complex in Vietnam, to the east of the Red River Shear Zone. It shows a large antiformal structure involving orthogneisses and migmatites overlain, on its northern¯ank, by muscovite bearing marbles. An E±W striking fault bounds the dome to the South. Kinematic indicators along a S±N section reveal top-to-the-N shear sense along the interface between the orthogneissic core and the overlying metasediments. Radiometric ages were obtained by the 40 Ar± 39 Ar method using puri®ed mica separates. Across the dome ages range from 236 Ma at the southern edge to 160 Ma in the core, attesting to a strong imprint in the Early Triassic time. A clear difference is seen between these Mesozoic ages and the Eocene to Miocene ages (from 40 to 24 Ma) that obtained in the nearby Red River Shear Zone using the same method. These data show that the Song Chay Massif was already high in the crust when the high temperature deformation of the Red River Shear Zone took place. The ®nal exhumation of the Song Chay orthogneiss constrained by ®ssion-track analysis on samples along the same transect occurred during the Early Miocene and could be interpreted as the consequence of a ®rst normal sense of motion along the fault which bounds the massif to the south. Timing is similar to that of exhumation in the Red River Shear zone. q

Computing Research Repository, 2007

In this paper we study a game where every player is to choose a vertex (facility) in a given undi... more In this paper we study a game where every player is to choose a vertex (facility) in a given undirected graph. All vertices (customers) are then assigned to closest facilities and a player’s payoff is the number of customers assigned to it. We show that deciding the existence of a Nash equilibrium for a given graph is mathcalNP\mathcal{NP}mathcalNP -hard. We also introduce a new measure, the social cost discrepancy, defined as the ratio of the costs between the worst and the best Nash equilibria. We show that the social cost discrepancy in our game is Omega(sqrtn/k)\Omega(\sqrt{n/k})Omega(sqrtn/k) and O(sqrtkn)O(\sqrt{kn})O(sqrtkn) , where n is the number of vertices and k the number of players.

Journal of Management Education, 2002

... Nancy K. Napier Boise State University Ngo Minh Hang Nguyen Thi Tuyet Mai Nguyen Van Thang Vu... more ... Nancy K. Napier Boise State University Ngo Minh Hang Nguyen Thi Tuyet Mai Nguyen Van Thang Vu Van Tuan National Economics University ... With no official evaluation method, we tried to listento our students and each other to assess whether the experience had value. ...

Journal of Experimental Zoology, 2002

Crocodylus siamensis, the Siamese crocodile, is a critically endangered species of freshwater cro... more Crocodylus siamensis, the Siamese crocodile, is a critically endangered species of freshwater crocodile previously distributed throughout much of SE Asia. Recovery plans call for reintroductions to the wild using founder individuals currently in captivity, mostly in commercial crocodile farms. On many farms C. siamensis has been intentionally hybridised with either Cuban crocodiles, C. rhombifer, or the estuarine crocodile, C. porosus, and hybrids may be difficult to distinguish morphologically. We report on the combined use of microsatellite and mtDNA genetic markers to determine the species status of potential founder individuals for reintroduction of C. siamensis. Genetic markers were used to characterise 103 captive and wild-caught individuals of C. siamensis, C. rhombifer and C. porosus in Vietnam and to distinguish purebred versus hybrid individuals. Although the microsatellite loci used had some overlap of allele sizes among species, assignment tests allowed differentiation. Four hybrids were identified, two of which had not been recognised morphologically as hybrids, and one of these was thought to be a C. siamensis suitable for reintroduction. Ten of the identified purebred C. siamensis were subsequently released into Cat Tien National Park in southern Vietnam. J. Exp. Zool. (Mol. Dev. Evol.) 294:373–381, 2002. © 2002 Wiley-Liss, Inc.

Journal of Hydraulic Research, 1986

... Titre du document / Document title. Self-excited vibrations of vertical-lift gates. Auteur(s)... more ... Titre du document / Document title. Self-excited vibrations of vertical-lift gates. Auteur(s) / Author(s). THANG ND (1) ; NAUDASCHER E. ; Affiliation(s) du ou des auteurs / Author(s) Affiliation(s). (1) Univ. Karlsruhe, inst. hydromechanics, ALLEMAGNE Revue / Journal Title. ...