Secrecy Analysis with MRC/SC-Based Eavesdropper over Heterogeneous Channels

Tran, Duc-Dung,Ha, Dac-Binh,Tran-Ha, Vu,Hong, Een-Kee Taylor Francis 2015 IETE journal of research Vol.61 No.4

Tomographic density imaging using modifi ed DF–DBIM approach

Tran Quang Huy,Nguyen Thi Cuc,Van Dung Nguyen,Ton That Long,Tran Duc Tan 대한의용생체공학회 2019 Biomedical Engineering Letters (BMEL) Vol.9 No.4

Ultrasonic computed tomography based on back scattering theory is the most powerful and accurate tool in ultrasound basedimaging approaches because it is capable of providing quantitative information about the imaged target and detects verysmall targets. The duple-frequency distorted Born iterative method (DF–DBIM), which uses density information along withsound contrast for imaging, is a promising approach for imaging targets at the level of biological tissues. With two frequenciesf 1 (low) and f 2 (high) through 1and 2iterations respectively, this method is used to estimate target density along withsound contrast. The implications of duple-frequency fusion for the image reconstruction quality of density information alongwith sound contrast based ultrasound tomography have been analyzed in this paper. In this paper, we concentrate on theselection of parameters that is supposed to be the best to improve the reconstruction quality of ultrasound tomography. Whenthere are restraints imposed on simulated scenarios to have control of the computational cost, the iteration number 1isdetermined resulting in giving the best performance. The DF–DBIM is only eff ective if there are a moderate number of iterations,transmitters and receivers. In case that the number of transducers is either too large or too small, a result of reconstructionwhich is better than that of the single frequency approach is not produced by the implementation of DF–DBIM. A fi xedsum of 1and 2was given, the investigation of simulation results shows that the best value of 1is[2− 1]. Theerror, when applying this way of choosing the parameters, will be normalized with the reduction of 56.11%, compared touse single frequency as used in the conventional DBIM method. The target density along with sound contrast is used to imagetargets in this paper. It is a fact that low-frequency off ers fi ne convergence, and high-frequency off ers fi ne spatial resolution. Wherefore, this technique can eff ectively expand DBIM’s applicability to the problem of biological tissue reconstruction. Thanks to the usage of empirical data, this work will be further developed prior to its application in reality.

Contrast Agents For Magnetic Resonance Imaging Based On Ferrite Nanoparticles Synthesized by Using a Wet-Chemical Method

Tran Hoang Hai,Le Hong Phuc,Doan Thi Kim Dung,Nguyen Thi Le Huyen,Bui Duc Long,Le Khanh Vinh,Nguyen Thi Thanh Kieu,Massanori Abe 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.2

Magnetic resonance imaging (MRI) has become a major and promising topic in medical researching because of its numerous potential applications. Due to the specic uptake by macrophage and not entirely captured by liver and spleen at first-pass, Superparamagnetic nanoparticles (SPIONs) are widely investigated as diagnostic tracer for magnetic resonance imaging (MRI). Surfactantcoated Fe3O4 particles (6 nm diameter) have been synthesized by using a wet chemical method (co-precipitation). Our study concentrated on synthesizing magnetic nanoparticles Fe3O4 coating oleic acid and Dextran and Starch polysaccharides.

Expression analyses of soybean genes encoding methionine-Rsulfoxide reductase under various conditions suggest a possible role in the adaptation to stress

Ha Duc Chu,Kim-Lien Nguyen,Yasuko Watanabe,Dung Tien Le,Lam-Son Phan Tran 한국응용생명화학회 2016 Applied Biological Chemistry (Appl Biol Chem) Vol.59 No.5

Under stress, plant cellular proteins can be oxidized at multiple amino acid residues causing protein dysfunction that may lead to reduced viability of plants. One of the oxidized amino acids, methionine sulfoxide (MetO), was frequently found in stressed plants. In soybeans, there are five methionine-R-sulfoxide reductases (GmMSRBs) responsible for the reduction of Met-R-O, one of the two MetO isomers. To identify GmMSRBs that may be involved in repairing Met-R-O under different stress conditions, we determined transcript levels of GmMSRBs in various tissues subjected to dehydration/drought, high salinity, and abscisic acid (ABA) during different developmental stages. Under normal conditions, expression levels were the highest in leaves, followed by roots, and lowest in seeds and seed pods. Among the GmMSRBs, transcripts of GmMSRB1 in the leaves were the highest; at the same time, GmMSRB5 was shown to be expressed at the lowest levels. Expression of GmMSRBs were then determined under stress-inducing conditions. In seedling shoots, GmMSRB2 and GmMSRB5 were expressed in response to drought conditions. In vegetative V6 trifolia, only GmMSRB3 was induced under drought. In reproductive R2 trifolia, the expression of GmMSRB2 and GmMSRB5 were induced by drought. However, expressions of all five GmMSRBs in the roots were not affected by the any stressinducing conditions. Under salt stress, GmMSRB1 was downregulated in seedling shoots and GmMSRB5 was up-regulated in seedling roots. Treatment with ABA did not affect the transcript levels of any GmMSRBs in seedling shoots. However, this treatment up-regulatesGmMSRB2 in seedling roots. Our data suggested that with the exception of GmMSRB4, all the remaining four GmMSRBs play a role in soybean responses to multiple environmental stresses and that genes encoding cytosolic and plastidic GmMSRBs respond differently under stress.

Determinants Influencing the Conversion of Financial Statements: The Case of Multinational Firms in Vietnam

Manh Dung TRAN,Thi Tuyet Mai NGO,To Uyen PHAN,Duc Tai DO,Thi Thuy Hang PHAM 한국유통과학회 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.3

The research aims to investigate the impact levels of determinants on the conversion of financial statements from Vietnamese accounting standards (VAS) to International financial reporting standards (IFRS) in the multinational firms in Vietnam. The method of data collection was done through the survey and subjects are accountants in Multinational Firms doing business in Hanoi and ten neighboring provinces. After checking the information on the votes, there are 170 questionnaires with full information for data entry and analysis. We use Cronbach‟s Alpha, EFA analysis and run regression model to investigate the impact levels of each independent variable on dependent variable of the conversion of VAS financial statements to IFRS. The results show that five determinants including Economic, Politics, Law, Culture, and Conditions for implementation have positive relationships with the conversion of VAS financial statements to IFRS. In particular, Economic determinant is the most strongest. Based on the findings, some recommendations are given for improving the conversion of VAS financial statements to IFRS of multinational firms doing business in the context of Vietnam. The results are considered a useful reference for firms when making financial statements to transparently change the financial statement information and improve the quality of financial statement information.

Expression analyses of soybean genes encoding methionine-R-sulfoxide reductase under various conditions suggest a possible role in the adaptation to stress

Chu, Ha Duc,Nguyen, Kim-Lien,Watanabe, Yasuko,Le, Dung Tien,Tran, Lam-Son Phan The Korean Society for Applied Biological Chemistr 2016 Applied Biological Chemistry (Appl Biol Chem) Vol.59 No.5

Under stress, plant cellular proteins can be oxidized at multiple amino acid residues causing protein dysfunction that may lead to reduced viability of plants. One of the oxidized amino acids, methionine sulfoxide (MetO), was frequently found in stressed plants. In soybeans, there are five methionine-R-sulfoxide reductases (GmMSRBs) responsible for the reduction of Met-R-O, one of the two MetO isomers. To identify GmMSRBs that may be involved in repairing Met-R-O under different stress conditions, we determined transcript levels of GmMSRBs in various tissues subjected to dehydration/drought, high salinity, and abscisic acid (ABA) during different developmental stages. Under normal conditions, expression levels were the highest in leaves, followed by roots, and lowest in seeds and seed pods. Among the GmMSRBs, transcripts of GmMSRB1 in the leaves were the highest; at the same time, GmMSRB5 was shown to be expressed at the lowest levels. Expression of GmMSRBs were then determined under stress-inducing conditions. In seedling shoots, GmMSRB2 and GmMSRB5 were expressed in response to drought conditions. In vegetative V6 trifolia, only GmMSRB3 was induced under drought. In reproductive R2 trifolia, the expression of GmMSRB2 and GmMSRB5 were induced by drought. However, expressions of all five GmMSRBs in the roots were not affected by the any stressinducing conditions. Under salt stress, GmMSRB1 was down-regulated in seedling shoots and GmMSRB5 was up-regulated in seedling roots. Treatment with ABA did not affect the transcript levels of any GmMSRBs in seedling shoots. However, this treatment up-regulates GmMSRB2 in seedling roots. Our data suggested that with the exception of GmMSRB4, all the remaining four GmMSRBs play a role in soybean responses to multiple environmental stresses and that genes encoding cytosolic and plastidic GmMSRBs respond differently under stress.

Immobilizing Trypsin on Magnetic Nanoparticles with Chitosan Coating

Doan Thi Kim Dung,Tran Hoang Hai,Le Hong Phuc,Bui Duc Long,Le Khanh Vinh,Phan Nha Truc 한국자기학회 2008 한국자기학회 학술연구발표회 논문개요집 Vol.- No.-

Researching Arsenic Absorbability of Magnetic Nanoparticles Fe₃O₄ Coated with Oleic and Alginic Coatings

Le Khanh Vinh,Tran Hoang Hai,Le Hong Phuc,Doan Thi Kim Dung,Bui Duc Long,Ly Thi My Huong 한국자기학회 2008 한국자기학회 학술연구발표회 논문개요집 Vol.- No.-

Four novel mutations in the androgen receptor gene from Vietnamese patients with androgen insensitivity syndrome

Nguyen Thu Hien,Nguyen Duc Quan,Kim Lien Nguyen Thi,Thi Thanh Ngan Nguyen,Nguyen Thi Phuong Mai,Tran Ngoc Dung,Nguyen Huy Hoang 한국유전학회 2023 Genes & Genomics Vol.45 No.4

Background Androgens and androgen receptor (AR) are critical regulators of the masculinization process in male sexual development. The absence of a functioning AR results in the development of the androgen insensitivity syndrome (AIS), a rare disorder of sexual development (DSD) characterized by the external genitalia feminization, gynecomastia, and impaired spermatogenesis. Objective To determine the AR gene mutations associated with male DSD in four unrelated Vietnamese patients. Methods To detect the disease-causing mutations, whole exome sequencing (WES) was performed on four patients diagnosed with AIS. Sanger sequencing was then used for validation of the identified mutations. Finally, 12 web-based tools, three-dimensional protein modeling software, and the guidelines issued by the American College of Medical Genetics and Genomics were used to assess the potential pathogenicity of these mutations. Results Four distinct novel mutations, namely c.1834T > A (p.Cys612Ser), c.2122 C > G (p.Leu708Val), c.2630T > G (p.Phe877Cys), and c.2641 C > A (p.Leu881Met) in the AR gene, were identified in four AIS patients using WES. The in silico analysis results revealed that the Cys612, Leu708, Phe877, and Leu881 sites are important for an appropriate response to androgens of the AR, and mutation at these sites can have adverse effects on the AR functions, androgen–AR interaction, and AR signaling pathway. Conclusions WES and in silico analyses strongly suggested that four novel AR mutations are pathogenic and have led to the development of AIS in the four Vietnamese patients under consideration.

Outcomes of liver transplantation for hepatocellular carcinoma: Experiences from a Vietnamese center

Khai Viet Ninh,Dang Hai Do,Trung Duc Nguyen,Phuong Ha Tran,Tuan Hoang,Dung Thanh Le,Nghia Quang Nguyen 한국간담췌외과학회 2024 Annals of hepato-biliary-pancreatic surgery Vol.28 No.1

Backgrounds/Aims: Liver transplantation (LT) provides a favorable outcome for patients with hepatocellular carcinoma (HCC) and was launched in Vietnam in 2004. In this study, we evaluated the short-term and long-term outcomes of LT and its risk factors. Methods: This retrospective study analyzed HCC patients who underwent LT at Viet Duc University hospital, Vietnam, from 01/2012–03/2022. The following data were gathered: demographics, virus infection, tumor characteristics, alpha-fetoprotein (AFP) level, Child-Pugh and MELD scores, selection criteria, type of LT, complications, 30-day mortality, and disease-free and overall survival (DFS and OS). Results: Fifty four patients were included, the mean age was 55.39 ± 8.46 years. Nearly 90% had hepatitis B virus-related HCC. The median (interquartile range) AFP level was 16.2 (88.7) ng/mL. The average MELD score was 10.57 ± 5.95; the rate of Child-Pugh A and B were 70.4% and 18.5%, respectively. Nearly 40% of the patients were within Milan criteria, brain-dead donor was 83.3%. Hepatic and portal vein thrombosis occurred in 0% and 1.9%, respectively; hepatic artery thrombosis 1.9%, biliary leakage 5.6%, and postoperative hemorrhage 3.7%. Ninety-day mortality was 5.6%. Five-year DFS and OS were 79.3% and 81.4%, respectively. MELD score and Child- Pugh score were predictive factors for DFS and OS (p < 0.05). In multivariate analysis, Child-Pugh score was the only significant factor (p < 0.05). Conclusions: In Vietnam, LT is an effective therapy for HCC with an acceptable complication rate, mortality rate, and good survival outcomes, and should be further encouraged.