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A lower hybrid current drive system for ITER
Hoang, G.T.,Bé,coulet, A.,Jacquinot, J.,Artaud, J.F.,Bae, Y.S.,Beaumont, B.,Belo, J.H.,Berger-By, G.,Bizarro, Joã,o P.S.,Bonoli, P.,Cho, M.H.,Decker, J.,Delpech, L.,Ekedahl, A.,Garcia, J. International Atomic Energy Agency 2009 Nuclear fusion Vol.49 No.7
<P>A 20 MW/5 GHz lower hybrid current drive (LHCD) system was initially due to be commissioned and used for the second mission of ITER, i.e. the <I>Q</I> = 5 steady state target. Though not part of the currently planned procurement phase, it is now under consideration for an earlier delivery. In this paper, both physics and technology conceptual designs are reviewed. Furthermore, an appropriate work plan is also developed. This work plan for design, R&D, procurement and installation of a 20 MW LHCD system on ITER follows the ITER Scientific and Technical Advisory Committee (STAC) T13-05 task instructions. It gives more details on the various scientific and technical implications of the system, without presuming on any work or procurement sharing amongst the possible ITER partners. This document does not commit the Institutions or Domestic Agencies of the various authors in that respect.</P>
Vo Hoang Nhat, P.,Ngo, H.H.,Guo, W.S.,Chang, S.W.,Nguyen, D.D.,Nguyen, P.D.,Bui, X.T.,Zhang, X.B.,Guo, J.B. Elsevier 2018 Bioresource Technology Vol.256 No.-
<P><B>Abstract</B></P> <P>Algae is a well-known organism that its characteristic is prominent for biofuel production and wastewater remediation. This critical review aims to present the applicability of algae with in-depth discussion regarding three key aspects: (i) characterization of algae for its applications; (ii) the technical approaches and their strengths and drawbacks; and (iii) future perspectives of algae-based technologies. The process optimization and combinations with other chemical and biological processes have generated efficiency, in which bio-oil yield is up to 41.1%. Through life cycle assessment, algae bio-energy achieves high energy return than fossil fuel. Thus, the algae-based technologies can reasonably be considered as green approaches. Although selling price of algae bio-oil is still high (about $2 L<SUP>−1</SUP>) compared to fossil fuel’s price of $1 L<SUP>−1</SUP>, it is expected that the algae bio-oil’s price will become acceptable in the next coming decades and potentially dominate 75% of the market.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Microalgae has more lipid content while macroalgae is rich of carbohydrate. </LI> <LI> Algae is efficient in nutrients removal. </LI> <LI> Combined processes, optimization and algae strains screening are important. </LI> <LI> Revenues in algae-based biofuel production and wastewater remediation are limited. </LI> <LI> Policy and social support for commercialization are lacking. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
T. T. V. Nga,T. D. Hien,N. P. Duong,T. D. Hoang 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.5
La-doped Sr-hexaferrite particles were prepared by using sol-gel method. Post-preparation calcination with the aim of improving the magnetic properties of the as-synthesized particles was conducted at temperatures ranging from 800 ℃ to 1050 ℃ for 2 h in air. The effects of the calcination temperature and the La concentration (x = 0 - 0.15) on the crystallography, the particle morphology and the magnetic properties of La-doped Sr-hexaferrite were investigated by using X-ray diraction (XRD), transmissions electron microscopy (TEM) and vibrating sample magnetometry (VSM). At a calcinations temperature of 850 ℃, the intrinsic coercivity (iHC) reached a maximum value of 7 kOe for the sample with x = 0.05 and the saturation magnetization (MS) reached 72 emu/g after calcination at 1050 ℃. La-doped Sr-hexaferrite particles were prepared by using sol-gel method. Post-preparation calcination with the aim of improving the magnetic properties of the as-synthesized particles was conducted at temperatures ranging from 800 ℃ to 1050 ℃ for 2 h in air. The effects of the calcination temperature and the La concentration (x = 0 - 0.15) on the crystallography, the particle morphology and the magnetic properties of La-doped Sr-hexaferrite were investigated by using X-ray diraction (XRD), transmissions electron microscopy (TEM) and vibrating sample magnetometry (VSM). At a calcinations temperature of 850 ℃, the intrinsic coercivity (iHC) reached a maximum value of 7 kOe for the sample with x = 0.05 and the saturation magnetization (MS) reached 72 emu/g after calcination at 1050 ℃.
T. Nguyen-Thoi,T. Bui-Xuan,P. Phung-Van,S. Nguyen-Hoang,H. Nguyen-Xuan 대한토목학회 2014 KSCE JOURNAL OF CIVIL ENGINEERING Vol.18 No.4
The edge-based strain smoothing technique is combined with the three-node Mindlin plate element (MIN3) to give a so-called theedge-based smoothed three-node Mindlin plate element (ES-MIN3) for static and free vibration analyses of plates. In the formulationof the ES-MIN3, the MIN3 together with a shear stabilized technique is used to compute the strains and to avoid the shear locking. Then the strain smoothing technique on the smoothing domains associated with edges of elements is used to smooth the strains on theadjacent elements. This strain smoothing technique can provide proper softening effect, which will effectively relieve the stiffbehavior of the MIN3 and thus improve significantly the accuracy of solutions. The numerical examples demonstrated that the ESMIN3is free of shear locking, passes the patch test and shows three superior properties such as: (1) be a strong competitor to othersexisting plate elements in the static analysis; (2) can give high accurate solutions in free vibration analysis; (3) can provide accuratelythe values of high frequencies of plates by using only coarse meshes.
Lim, Chae-Seok,Kang, Xi,Mirabella, Vincent,Zhang, Huaye,Bu, Qian,Araki, Yoichi,Hoang, Elizabeth T.,Wang, Shiqiang,Shen, Ying,Choi, Sukwoo,Kaang, Bong-Kiun,Chang, Qiang,Pang, Zhiping P.,Huganir, Richar Cold Spring Harbor Laboratory Press 2017 Genes & development Vol.31 No.6
<P>Rapid advances in genetics are linking mutations on genes to diseases at an exponential rate, yet characterizing the gene mutation-cell behavior relationships essential for precision medicine remains a daunting task. More than 350 mutations on small GTPase BRaf are associated with various tumors, and similar to 40 mutations are associated with the neurodevelopmental disorder cardio-facio-cutaneous syndrome (CFC). Wedeveloped a fast cost-effective lentivirus-based rapid gene replacement method to interrogate the physiopathology of BRaf and similar to 50 disease-linked BRaf mutants, including all CFC-linked mutants. Analysis of simultaneous multiple patch-clamp recordings from 6068 pairs of rat neurons with validation in additional mouse and human neurons and multiple learning tests from 1486 rats identified BRaf as the key missing signaling effector in the common synaptic NMDA-R-CaMKII-SynGap-Ras-BRaf-MEK-ERK transduction cascade. Moreover, the analysis creates the original big data unveiling three general features of BRaf signaling. This study establishes the first efficient procedure that permits large-scale functional analysis of human disease-linked mutations essential for precision medicine.</P>
A dynamic foundation model for the analysis of plates on foundation to a moving oscillator
Phuoc T. Nguyen,Trung D. Pham,Hoa P. Hoang 국제구조공학회 2016 Structural Engineering and Mechanics, An Int'l Jou Vol.59 No.6
This paper proposes a new foundation model called “Dynamic foundation model” for the dynamic analysis of plates on foundation subjected to a moving oscillator. This model includes a linear elastic spring, shear layer, viscous damping and the special effects of mass density parameters of foundation during vibration. By using finite element method and the principle of dynamic balance, the governing equation of motion of the plate travelled by the oscillator is derived and solved by the Newmark‟s time integration procedure. The accuracy of the algorithm is verified by comparing the numerical results with the other numerical results in the literature. Also, the effects of mass and damping ratio of system components, stiffness of suspension system, velocity of moving oscillator, and dynamic foundation parameters on dynamic responses are investigated. A very important role of these factors will be shown in the dynamic behavior of the plate.
Impact of Work Motivation on Satisfaction and Turnover of Public Universities Lecturers
PHAM, Chinh D.,HOANG, Thao P.D.,NGUYEN, Yen T. Korea Distribution Science Association 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.2
The paper aims to examine the relationship between various types of motivation and satisfaction as well as turnover intentions of public university lecturers. Intrinsic motivation is found to affect both satisfaction and turnover, while for extrinsic motivation, only one type has a significant effect on satisfaction. The web-based questionnaire with convenience sampling was chosen to approach target respondents. Data was collected by sending a link of the questionnaire to the lecturers' email. There were 700 questionnaires collected. Of which 681 valid responses, after screening out unusual questionnaires. In order to fulfill these aims, the authors employed structural equation modeling with maximum likelihood method supported by AMOS software with 681 valid samples. The evidence confirms the high correlation between intrinsic motivation and satisfaction for university lecturers which has been shown in previous studies. With regard to extrinsic motivation, extrinsic regulation (material) is found to have a positive influence on satisfaction, meaning financial rewards and job security will lead to his contentment while introjected regulation is a source of dissatisfaction. The results also demonstrate that intrinsic motivation is negatively correlated with turnover intentions. A person who is interested in the job itself is less likely to leave his or her job due to a keen passion for it.
Experiments on influence of foundation mass on dynamic characteristic of structures
Trung D. Pham,Hoa P. Hoang,Phuoc T. Nguyen 국제구조공학회 2018 Structural Engineering and Mechanics, An Int'l Jou Vol.65 No.5
Recently, a new foundation model called “Dynamic foundation model” was proposed for the dynamic analysis of structures on the foundation. This model includes a linear elastic spring, shear layer, viscous damping and the special effects of mass density parameter of foundation during vibration. However, the relationship of foundation property parameters with the experimental parameter of the influence of foundation mass also has not been established in previous research. Hence, the purpose of the paper presents a simple experimental model in order to establish relationships between foundation properties such as stiffness, depth of foundation and experimental parameter of the influence of foundation mass. The simple experimental model is described by a steel plate connected with solid rubber layer as a single degree of freedom system including an elastic spring connected with lumped mass. Based on natural circular frequencies of the experimental models determined from FFT analysis plots of the time history of acceleration data, the experimental parameter of the influence of foundation mass is obtained and the above relationships are also discussed.