oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 14 )

2018 ( 92 )

2017 ( 111 )

2016 ( 107 )

Custom range...

Search Results: 1 - 10 of 20048 matches for " Le Nguyen Truc Nhu "
All listed articles are free for downloading (OA Articles)
Page 1 /20048
Display every page Item
A regression characterization of inverse Gaussian distributions and application to EDF goodness-of-fit tests
Khoan T. Dinh,Nhu T. Nguyen,Truc T. Nguyen
International Journal of Mathematics and Mathematical Sciences , 2003, DOI: 10.1155/s0161171203207237
Abstract: We give a new characterization of inverse Gaussian distributions using the regression of a suitable statistic based on a given random sample. A corollary of this result is a characterization of inverse Gaussian distribution based on a conditional joint density function of the sample. Application of this corollary as a transformation in the procedure to construct EDF (empirical distribution function) goodness-of-fit tests for inverse Gaussian distributions is also studied.
Early Pandemic Influenza (2009 H1N1) in Ho Chi Minh City, Vietnam: A Clinical Virological and Epidemiological Analysis
Tran Tinh Hien equal contributor,Maciej F. Boni equal contributor ,Juliet E. Bryant equal contributor,Tran Thuy Ngan equal contributor,Marcel Wolbers,Tran Dang Nguyen,Nguyen Thanh Truong,Nguyen Thi Dung,Do Quang Ha,Vo Minh Hien,Tran Tan Thanh,Le Nguyen Truc Nhu,Le Thi Tam Uyen,Pham Thi Nhien,Nguyen Tran Chinh,Nguyen Van Vinh Chau,Jeremy Farrar,H. Rogier van Doorn equal contributor
PLOS Medicine , 2010, DOI: 10.1371/journal.pmed.1000277
Abstract: Background To date, little is known about the initial spread and response to the 2009 pandemic of novel influenza A (“2009 H1N1”) in tropical countries. Here, we analyse the early progression of the epidemic from 26 May 2009 until the establishment of community transmission in the second half of July 2009 in Ho Chi Minh City (HCMC), Vietnam. In addition, we present detailed systematic viral clearance data on 292 isolated and treated patients and the first three cases of selection of resistant virus during treatment in Vietnam. Methods and Findings Data sources included all available health reports from the Ministry of Health and relevant health authorities as well as clinical and laboratory data from the first confirmed cases isolated at the Hospital for Tropical Diseases in HCMC. Extensive reverse transcription (RT)-PCR diagnostics on serial samples, viral culture, neuraminidase-inhibition testing, and sequencing were performed on a subset of 2009 H1N1 confirmed cases. Virological (PCR status, shedding) and epidemiological (incidence, isolation, discharge) data were combined to reconstruct the initial outbreak and the establishment of community transmission. From 27 April to 24 July 2009, approximately 760,000 passengers who entered HCMC on international flights were screened at the airport by a body temperature scan and symptom questionnaire. Approximately 0.15% of incoming passengers were intercepted, 200 of whom tested positive for 2009 H1N1 by RT-PCR. An additional 121 out of 169 nontravelers tested positive after self-reporting or contact tracing. These 321 patients spent 79% of their PCR-positive days in isolation; 60% of PCR-positive days were spent treated and in isolation. Influenza-like illness was noted in 61% of patients and no patients experienced pneumonia or severe outcomes. Viral clearance times were similar among patient groups with differing time intervals from illness onset to treatment, with estimated median clearance times between 2.6 and 2.8 d post-treatment for illness-to-treatment intervals of 1–4 d, and 2.0 d (95% confidence interval 1.5–2.5) when treatment was started on the first day of illness. Conclusions The patients described here represent a cross-section of infected individuals that were identified by temperature screening and symptom questionnaires at the airport, as well as mildly symptomatic to moderately ill patients who self-reported to hospitals. Data are observational and, although they are suggestive, it is not possible to be certain whether the containment efforts delayed community transmission in Vietnam.
Role of Parent Control of International Joint Venture in Gaining Competitive Advantage
Nguyen Huu Le,Do Nhu
International Journal of Economics and Finance , 2009, DOI: 10.5539/ijef.v1n2p60
Abstract: This article aims to investigate role of foreign parent control of international joint ventures (IJVs) in gaining sustainable competitive advantages from partnership with local firm through achieving 1) accesses to local firm’s proprietary resources, 2) promoting knowledge and skills acquisition, 3) economies of scale and scope, 4) market position. Foreign parent firm control is conceptualized across three dimensions including the control mechanism, the control focus, and the extent of control. As foundation theories, resource dependent theory and organizational learning theory are employed. Our empirical evidence is based on the survey data collected from Finnish firms that established IJVs with local firms in the 1990s. The empirical evidence shows that in order to achieve successfully competitive advantages when entering IJVs, foreign parent firms need to have comparable IJV control structures which fit with their intended specific competitive advantages.
Food Retail Competitive Strategy in Recession Economy: A case of Successful Foreign Discount Stores in Finland
Nguyen Huu Le,Do Nhu
International Journal of Business and Management , 2009, DOI: 10.5539/ijbm.v4n6p44
Abstract: The study aims to increase our knowledge of how a retailer can survive in recession economy by changing its competitive strategy. In particular, the study is to identify those strategies that can help retailers to maintain successful performance despite turbulence in the operational environment. A case study approach is employed to explore a whole picture of a successful retailer’s actions and strategy to scope with down turn economy. Results of the study show that retailers can maintain and improve their performance in times of crisis by adjusting their competitive strategies properly. We found that in recession period, retailers need to exercise a combination of competitive strategies including low cost focus and differentiation focus strategy. To be able to enhance low cost strategy, retailers need to have logic logistic center, to increase effectiveness of employees, and to reduce wastes from right-ordered for fresh food products, to strictly utilize first-in-first-out food product displaying methods. For focus strategy, firms need to pull unprofitable products from the shelves, and to focus on profit-driven product selection, to focus their promotion campaign on the most effective time and channel. In differentiation strategy, retailers need to be more selective for which products to offer, and to be more creative in their promotion program.
A New Genetic Algorithm Applied to Multi-Objectives Optimal of Upgrading Infrastructure in NGWN  [PDF]
Dac-Nhuong Le, Nhu Gia Nguyen, Dac Binh Ha, Vinh Trong Le
Communications and Network (CN) , 2013, DOI: 10.4236/cn.2013.53B2042
Abstract: A problem of upgrading to the Next Generation Wireless Network (NGWN) is backward compatibility with pre-existing networks, the cost and operational benefit of gradually enhancing networks, by replacing, upgrading and installing new wireless network infrastructure elements that can accommodate both voice and data demand. In this paper, we propose a new genetic algorithm has double population to solve Multi-Objectives Optimal of Upgrading Infrastructure (MOOUI) problem in NGWN. We modeling network topology for MOOUI problem has two levels in which mobile users are sources and both base stations and base station controllers are concentrators. Our objective function is the sources to concentrators connectivity cost as well as the cost of the installation, connection, replacement, and capacity upgrade of infrastructure equipment. We generate two populations satisfy constraints and combine them to build solutions and evaluate the performance of my algorithm with data randomly generated. Numerical results show that our algorithm is a promising approach to solve this problem.
Intrinsic Prices of Risk  [PDF]
Truc Le
Journal of Mathematical Finance (JMF) , 2014, DOI: 10.4236/jmf.2014.45029
Abstract: We review the nature of some well-known phenomena such as volatility smiles, convexity adjustments and parallel derivative markets. We propose that the market is incomplete and postulate the existence of intrinsic risks in every contingent claim as a basis for understanding these phenomena. In a continuous time framework, we bring together the notion of intrinsic risk and the theory of change of measures to derive a probability measure, namely risk-subjective measure, for evaluating contingent claims. This paper is a modest attempt to prove that measure of intrinsic risk is a crucial ingredient for explaining these phenomena, and in consequence proposes a new approach to pricing and hedging financial derivatives. By adapting theoretical knowledge to practical applications, we show that our approach is consistent and robust, compared with the standard risk-neutral approach.
A Novel Particle Swarm Optimization based Algorithm for the Optimal Centralized Wireless Access Network
Dac-Nhuong Le,Gia-Nhu Nguyen
International Journal of Computer Science Issues , 2013,
Abstract: The wireless access networks design problem is formulated as a constrained optimization problem, where the goal is to find a network topology such that an objective function is optimized, subject to a set of constraints. The objective function may be the total cost, or some performance measure like utilization, call blocking or throughput. The constraints may be bounds on link capacities, cost elements, or some network performance measure. However, the optimization problem is too complex. In this paper, we propose a novel Particle Swarm Optimization (PSO) algorithm to finding the total cost of connecting the BSs to the MSCs, and connecting the MSCs to the LE called by the optimal centralized wireless access network. Numerical results show that performance of our proposed algorithm is much better than previous studies.
Isolation and Identification of Arbuscular Mycorrhizal Fungi from Agricultural Fields of Vietnam  [PDF]
Zita Sasvári, Franco Magurno, Dóra Galanics, Tran Thi Nhu Hang, Tran Thi Hong Ha, Nguyen Dinh Luyen, Le Mai Huong, Katalin Posta
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.312A220
Abstract:

The rising claim for more environmental friendly and healthy agriculture is a strong incentive to find alternative strategies to replace the use of mineral fertilizer and pesticide. Arbuscular mycorrhizal fungi (AMF), a main component of soil microbiota, represent a promising tool as providers of key ecological services. The present work represented one of the first attempts to study, under a morphological and molecular point of view, the AMF communities associated to some strategic crops in Vietnam. The findings about the AMF morphotypes dominant in different crop systems could be a starting point for the development of well performing and adapted inocula suitable for the application in field.

Intrinsic Prices Of Risk
Truc Le
Quantitative Finance , 2014,
Abstract: We review the nature of some well-known phenomena such as volatility smiles, convexity adjustments and parallel derivative markets. We propose that the market is incomplete and postulate the existence of intrinsic risks in every contingent claim as a basis for understanding these phenomena. In a continuous time framework, we bring together the notion of intrinsic risk and the theory of change of measures to derive a probability measure, namely risk-subjective measure, for evaluating contingent claims. This paper is a modest attempt to prove that measure of intrinsic risk is a crucial ingredient for explaining these phenomena, and in consequence proposes a new approach to pricing and hedging financial derivatives. By adapting theoretical knowledge to practical applications, we show that our approach is consistent and robust, compared with the standard risk-neutral approach.
Preparation and Biological Properties of Platinum(II) Complex-Loaded Copolymer PLA-TPGS
Ha Phuong Thu,Phan Thi Hong Tuyet,Mai Thi Thu Trang,Nguyen Hoai Nam,Truong Thi Nhu Hieu,Le Quang Duong,Tran Thi Nhu Hang,Tran Thi Hong Ha,Do Huu Nghi,Le Huu Cuong,Le Mai Huong
Journal of Nanomaterials , 2013, DOI: 10.1155/2013/768628
Abstract: A new nanodrug system containing bis(menthone thiosemicarbazonato) Platinum(II) complex (Pt-thiomen) encapsulated with the block copolymers polylactide-d-α-tocopheryl polyethylene glycol 1000 succinate (PLA-TPGS) was prepared by a modified solvent extraction/evaporation technique. The characteristics of the nanoparticles including surface morphology, size distribution, structure, and biological activities such as antimicrobial and cytotoxic activities were in vitro investigated. The spherical nanoparticles were around 50?nm in size with core-shell structure and narrow-size distribution. The encapsulated Pt-thiomen can avoid interaction with proteins in the blood plasma. The inhibitory activity of Pt-thiomen-loaded PLA-TPGS nanoparticles on the growth of some bacteria, fungi, and Hep-G2 cells suggests a possibility of developing PLA-TPGS-Pt-thiomen nanoparticles as one of the potential chemotherapeutic agents. 1. Introduction Platinum(II) complexes, one of the most potent anticancer drugs, have been used for treatment against a variety of human cancers [1, 2]. They are effective cytotoxic agents in the treatment of epithelial malignancies such as lung, head and neck, ovarian, bladder, and testicular cancer [3]. However, their clinical applications is restricted because almost all platinum in the blood plasma are often bound by protein after intravenous injection [4]. The binding of Pt(II) complexes with proteins reduces the urinary excretion of platinum and causes the deposition of Platinum in tissues [5]. The action with proteins causes many side effects including renal and auditory toxicity, nausea, and vomiting [6–8]. The development of drug delivery systems in the last several decades has provided a variety of methods including the incorporation of drugs into liposomes, lipid emulsions, and polymeric micelles to reduce adverse effects, to increase their solubility, and to prolong circulation time as well [9–12]. More recently, a promising approach which has attracted much attention of researchers is the encapsulation of platinum-based anticancer drugs in sterically stabilized polymeric micelles. This strategy has succeeded in reducing toxicity and improving efficacy of encapsulated platinum complex due to an excellent stability in plasma and a much longer circulation time as compared to free Pt(II) complexes [13–16]. The in vitro test on antimicrobial activity of the series of platinum(II) complexes by the macrodilution method was also reported by Utku et al. [17]. Some synthesized complexes might be taken into consideration as promising antifungal
Page 1 /20048
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.