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Search Results: 1 - 10 of 5689 matches for " Hoang-Anh Nguyen "
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Formulating for Innovative Self-Compacting Concrete with Low Energy Super-Sulfated Cement Used for Sustainability Development  [PDF]
Hoang-Anh Nguyen, Ta-Peng Chang, Jeng-Ywan Shih, Chun-Tao Chen
Journal of Materials Science and Chemical Engineering (MSCE) , 2016, DOI: 10.4236/msce.2016.47004
Abstract:

This study proposed a new way to formulate a low energy super-sulfated cement (SSC) which can be used to produce self-compacting concrete (SCC) with high compressive strength and durability in terms of chloride penetration resistance. This innovative SSC, different from the traditional SSC, was purely produced with a ternary mixture of three industrial by-products of ground granulated blast furnace slag, low calcium Class F fly ash and circulating fluidized bed combustion (CFBC) fly ash and was denoted as SFC-SSC (super-sulfated cement made by mixture of slag, Class F fly ash and CFBC fly ash). Experimental results showed that the combination of a fixed amount of 15 wt.% of CFBC fly ash with various ratios of Class F fly ash to slag could be used to produce the hardened SCCs with high 28-day compressive strengths (41.8 - 65.6 MPa). Addition of Class F fly ash led to the resulting SCCs with lowered price and preferable engineering properties, and thus it was considered as state-of-the-art method to drive such type of concrete towards sustainable construction materials.

Humeral Shaft Fracture Treatment in the Elite Throwing Athlete: A Unique Application of Flexible Intramedullary Nailing
Christopher S. Lee,Shane M. Davis,Hoang-Anh Ho,Jan Fronek
Case Reports in Orthopedics , 2013, DOI: 10.1155/2013/546804
Abstract: Humeral shaft stress fractures are being increasingly recognized as injuries that can significantly impact throwing mechanics if residual malalignment exists. While minimally displaced and angulated injuries are treated nonoperatively in a fracture brace, the management of significantly displaced humeral shaft fractures in the throwing athlete is less clear. Currently described techniques such as open reduction and internal fixation with plate osteosynthesis and rigid antegrade/retrograde locked intramedullary nailing have significant morbidity due to soft tissue dissection and damage. We present a case report of a high-level baseball pitcher whose significantly displaced humeral shaft stress fracture failed to be nonoperatively managed and was subsequently treated successfully with unlocked, retrograde flexible intramedullary nailing. The athlete was able to return to pitching baseball in one year and is currently pitching in Major League Baseball. We were able to recently collect 10-year follow-up data. 1. Introduction Humeral shaft stress fractures are rare but well-described injuries in throwing athletes [1–9]. Baseball players are particularly at risk of this injury because of their throwing mechanics. Pitchers experience a mean humeral axial torque of almost 90?Nm during maximal external rotation of the shoulder. In addition to axial torque, there is also significant valgus stress to the humerus. This leads to repetitive stress of the humeral shaft as the distal end externally rotates relative to the proximal end [9]. Consequently, stress fractures may progress to displaced spiral fractures of the humeral shaft at the junction of the middle and distal thirds. With baseball becoming an increasingly global and year-round sport, the incidence of humeral shaft stress fractures is likely rising. While minimally displaced fractures heal uneventfully, significantly displaced or angulated fractures present a surgical dilemma. We present a case report where unlocked, retrograde flexible intramedullary nailing was used in a 17-year-old Major League Baseball pitching prospect after failed nonoperative treatment of a humeral shaft stress fracture. To avoid the associated morbidity of plate osteosynthesis and rigid intramedullary nailing, closed reduction and unlocked flexible intramedullary nailing was implemented. This technique has been described in the pediatric population and in select adult cases, but to our knowledge and after a literature review this is the first report of its usage in an adolescent, professional pitching prospect [10]. The patient
Detection of target DNA using fluorescent cationic polymer and peptide nucleic acid probes on solid support
Frédéric R Raymond, Hoang-Anh Ho, Régis Peytavi, Luc Bissonnette, Maurice Boissinot, Fran?ois J Picard, Mario Leclerc, Michel G Bergeron
BMC Biotechnology , 2005, DOI: 10.1186/1472-6750-5-10
Abstract: Using surface-bound peptide nucleic acids (PNA) probes and soluble fluorescent cationic polythiophenes, we show a simple and sensitive electrostatic approach to detect and identify unlabelled target nucleic acid on microarray.This simple methodology opens exciting possibilities for applied genetic analysis for the diagnosis of infections, identification of genetic mutations, and forensic inquiries. This electrostatic strategy could also be used with other nucleic acid detection methods such as electrochemistry, silver staining, metallization, quantum dots, or electrochemical dyes.Classical strategies for nucleic acid detection require labelling the analyte or the probes with fluorophores or other reporter molecules [1,2]. Labelling steps add cost, often complexify the reaction mixture, and are not useful when rapidity of the assay is essential, such as for some molecular diagnostic applications. Fluorescent conjugated polymers have already been shown to allow the sensitive detection of DNA and RNA in liquid phase by complexation of the cationic fluorescent polymer to negatively-charged nucleic acids [3-8]. The use of DNA/RNA-binding fluorescent polymers on microarray could allow unlabelled nucleic acid detection, and thus prevent the need for a nucleic acid labelling step. Using PNA capture probes, we show a simple and sensitive electrostatic approach which enables the direct detection and specific identification of unlabelled target nucleic acid analyte using a standard microarray scanner.Experiments with commercially available aldehyde-functionalized glass slides, while giving strong signal when fluorophore-labelled target DNA hybridized to DNA probes, gave no signal when detection was conducted using PNA probes (data not shown). We developed aminoalkylsilane slides activated with carbonyldiimidazole and compared them with commercial aldehyde slides. Our chemistry was compatible with detection on PNA capture probes using Cy3-labelled oligonucleotides or using the
Local Existence of Solution to a Class of Stochastic Differential Equations with Finite Delay in Hilbert Spaces  [PDF]
Le Anh Minh, Hoang Nam, Nguyen Xuan Thuan
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.41017
Abstract: In this paper, we present a local Lipchitz condition for the local existence of solution to a class of stochastic differential equations with finite delay in a real separable Hilbert space which has the following form: \"\"
Porosity Estimation from High Resolution CT SCAN Images of Rock Samples by Using Housfield Unit  [PDF]
Nguyen Lam Quoc Cuong, Nguyen Hong Minh, Hoang Manh Cuong, Phan Ngoc Quoc, Ngo Hoang Van Anh, Nguyen Van Hieu
Open Journal of Geology (OJG) , 2018, DOI: 10.4236/ojg.2018.810061
Abstract: Computer Automated Tomography has been shown to be a valuable tool in production research because it provides a non-destructive method to identify and evaluate the internal structural characteristics of reservoir rock. In CT scan, Hounsfield Unit (HU) is proportional to the degree of X-ray attenuation by the tissue. The aim of the present study was to introduce the method to estimate porosity which is one of physical parameters of reservoir rock though HU data. In this study, an Image J software was used to extract Hounsfield Unit data and calibrate by standard material’s density. This method provides the ability of using CT Scanner in advanced reservoir characterization and flow test experiments.
The Factors Impact on Employee Satisfaction in Work at Vietnamese Garment Enterprises  [PDF]
Hoang Thanh Tung, Nguyen Thi Van Anh, Pham Thi Thuy Anh
Open Journal of Business and Management (OJBM) , 2019, DOI: 10.4236/ojbm.2019.72045
Abstract: This research is to identify and assess the factors that impact an employee’s satisfaction in work. The company selected for this research is a leading garment company of the Vietnamese textile and garment industry. With the survey and analyzing the opinion of 318 workers, the research results indicated six groups of elements (variables) in work which have impacted on the staff’s satisfaction: wages and welfare, working conditions, relations with superiors, relations with colleagues, training and promotion opportunities, nature of work. These six-factor groups were measured by 27 observed variables. The analysis and evaluation of factors affect the satisfaction of employees in order to contribute practically to the setting up and implementation of effective measures to enhance job satisfaction for employees, create motivate labor and bring the higher labor productivity.
The Higgs Sector of the Minimal 3 3 1 Model Revisited
Nguyen Tuan Anh,Nguyen Anh Ky,Hoang Ngoc Long
Physics , 1998, DOI: 10.1142/S0217751X00000136
Abstract: The mass spectrum and the eigenstates of the Higgs sector of the minimal 3 3 1 model are revisited in detail. There are discrepancies between our results and previous results by another author.
The Higgs sector in the minimal 3-3-1 model with the most general lepton-number conserving potential
Nguyen Tuan Anh,Nguyen Anh Ky,Hoang Ngoc Long
Physics , 2000, DOI: 10.1142/S0217751X01003184
Abstract: The Higgs sector of the minimal 3 - 3 - 1 model with three triplets and one sextet is investigated in detail under the most general lepton--number conserving potential. The mass spectra and multiplet decompostion structure are explicitly given in a systematic order and a transparent way allowing they to be easily checked and used in further investigations. A previously arising problem of inconsistent signs of f_{2} is also automatically solved.
The anomalous magnetic moment of muon: from the E821 experiment to bilepton masses
Nguyen Anh Ky,Hoang Ngoc Long
Physics , 2001,
Abstract: Bilepton masses in the 3-3-1 models and the recently announced E821 experiment result are discussed. We get bounds on the bilepton masses 243 GeV $\leq M_Y \leq $ 357 GeV in the minimal model and 70 GeV $\leq M_Y \leq $ 115 GeV in the model with right-handed neutrinos.
Charge Ordering Under a Magnetic Field in the Extended Hubbard Model
Duc Anh Le,Anh Tuan Hoang,Toan Thang Nguyen
Physics , 2004,
Abstract: We study the charge ordering behavior under a magnetic field $H$ in the extended Hubbard model within the coherent potential approximation. At quarter filling, for small $H$ we find that the relative variation of critical temperature is quadratic with the coefficient ${\alpha}$ smaller than the one for conventional spin-Peierls systems. For intermediate field, a melting of the charge ordering on decreasing temperature under fixed $H$ at various band filling is found.
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