With an unprecedented challenge to combat COVID-19, the prediction of confirmed cases is very imp... more With an unprecedented challenge to combat COVID-19, the prediction of confirmed cases is very important to ensure medical aid and healthy living conditions. In order to predict confirmed cases, the current study uses a dataset prepared by the White House Office of Science and Technology Policy which brought together companies and research to address questions concerning COVID-19. The importance of this was to identify factors that seem to affect the transmission rate of COVID-19. The focus of the current research, however, is to predict global cases of COVID-19. There have been many papers written about the prediction of confirmed cases and fatalities, but they failed to show promising results. Our research applies machine learning for predicting fatalities in the world using the COVID-19 Forecasting dataset from Kaggle. After trying several algorithms, our findings reveal that Logistic Regression, Decision Tree, KNeighbors, GaussianNB, and Random Forest algorithms provide the best ...
The growth of applications in both scientific socialism and naturalism causes increasingly diffic... more The growth of applications in both scientific socialism and naturalism causes increasingly difficult to assess whether a question is sincere or not. It is mandatory for many marketing and financial companies. Many utilizations will be reconfigured beyond recognition, especially text and images, while others face potential extinction as a corollary of advances in technology and computer science in particular. Analyzing text and image data will be truly needed for understanding valuable insights. In this paper, we analyzed the Quora dataset obtained from Kaggle.com to filter insincere and spam content. We used different preprocessing algorithms and analysis models providing in PySpark. Besides, we analyzed the manner of users established in writing their posts via the proposed prediction models. Finally, we show the most accurate algorithm of the selected algorithms for classifying questions on Quora. The Gradient Boosted Tree was the best model for questions on Quora with accuracy that is 79.5%. Compared to other methods, the same building in Scikitlearn and machine learning LSTM+GRU, applying models in SpySpark could get the better answer in classifying questions on Quora.
Recently, artificial intelligence-based machine translation has been much improved over the tradi... more Recently, artificial intelligence-based machine translation has been much improved over the traditional methods. A machine translator is very useful for translating text or speech from one language to another. Machine translators have replaced the word mechanism in one language for words in another with verbatim translations. However, a good translation should be employed a both a sentence and a word that have complete meaning in accordance with the context of relevant sentence. In this paper, we studied on English-Vietnamese translation using deep learning methods including Recurrent Neural Network (RNN), Long Short-Term Memory (LSTM), Gated Recurrent Units (GRU), Attention, and Transformer. The deep learning-based machine translators were compared based on the test accuracy of results translation. It was found that best deep learningbased machine translator model was the Attention mechanism, achieving 98.8% accuracy. The Transformer yielded second rank or 98.5% accuracy.
In the past decades, e-government has been considered an effective tool for administrative reform... more In the past decades, e-government has been considered an effective tool for administrative reforms in both developed and developing countries. They are utilising information and communication technologies (ICTs) for more efficient governmental activities. E-government service development is contributing positively to the fight against corruption, administration reform and improving business environment competitiveness. However, based on the survey done by the authors along with the study of the outcome of the survey carried out by Vietnam’s Ministry of Information and Communication (MIC) of the ranking of ministerial and local websites, the paper points out that the current development of egovernment services is not up to expectation of citizens and businesses which will be the hindrances to the betterment of business environment in Vietnam. The development of e-government services is due to the lack of interoperability among responsible governmental organs and infrastructure, digit...
Aims: This study aims to access the predicting value of serum uric acid (UA) and high-sensitivity... more Aims: This study aims to access the predicting value of serum uric acid (UA) and high-sensitivity C reactive protein (hs-CRP) concentration on three-year cardiovascular-related mortality in patients performing continuous ambulatory peritoneal dialysis (CAPD). Methods: A total of 267 CAPD patients [150 male (56.2%); mean age 48.93 ± 13.58 years] were included in our study. All patients had measured serum UA and hs-CRP concentration. A high-sensitivity particleenhanced immunoturbidimetric assay determined serum hs-CRP; serum UA levels were determined using an enzymatic colorimetric assay. All patients were followed for three years to detect cardiovascular-related mortality by cardiologists and stroke specialists. Results: Mean serum UA level was 415.16 ± 84.28 µmol/L, 58.4% of patients had increased serum UA level. Median serum hs-CRP level was 2 (1-4) mg/L, 12.4% of patients had increased serum hs-CRP level. During 36 months of follow-up, 41 patients (15.4%) had cardiovascular-related mortality. The results of Cox proportional hazards regression showed that hypertension, diabetes, high serum UA and hs-CRP were risk factors that related to cardiovascular-related mortality (p<0.05). The receiver operating characteristic (ROC) curve and Kaplan-Meier analysis results showed that UA and hs-CRP level had predictive value for threeyear cardiovascular-related mortality in CAPD patients [uric acid: area under the curve (AUC)=0.822; hs-CRP: AUC=0.834, p < 0.001]. Conclusion: High serum UA and hs-CRP levels were predictive factors of cardiovascular-related mortality in CAPD patients.
This paper considers two finite integral transforms of Fourier-type, in view to propose a set of ... more This paper considers two finite integral transforms of Fourier-type, in view to propose a set of eight new convolutions, and to analyze the solvability of a class of the integral equations of Wiener-Hopf plus Hankel type, defined on finite intervals, which is involved in engineering problems. The solvability and solution of the considered equations are investigated by means of Fourier-type series, and a Shannon-type sampling formula is obtained. Some concluding remarks with respect to theoretical issues and engineering applications are emphasized in the last section, along with the analysis of some illustrative cases, which exemplify that the present method solves cases which are not under the conditions of previously known techniques.
This paper presents new convolutions for the fractional Fourier transform which are somehow assoc... more This paper presents new convolutions for the fractional Fourier transform which are somehow associated with the Hermite functions. Consequent inequalities and properties are derived for these convolutions, among which we emphasize two new types of Young's convolution inequalities. The results guarantee a general framework where the present convolutions are well-defined, allowing larger possibilities than the known ones for other convolutions. Furthermore, we exemplify the use of our convolutions by providing explicit solutions of some classes of integral equations which appear in engineering problems.
and Computer Engineering Smartphones have become an essential part of our society. The benefits o... more and Computer Engineering Smartphones have become an essential part of our society. The benefits of having an always present, highly capable device cannot be overstated. As more aspects of our life depend on our smartphones, it is more important than ever to ensure the availability of those devices. However, their big advantages also come with big risks. The fact that we have our smartphones with us all the time means that it is easier than ever to collect our information, sometimes without our consent. In this dissertation, we study the two pressing concerns in cellular communications: energy efficiency and privacy protection. We focus on LTE networks, the current most advanced global standard for cellular communications. In the first part of the dissertation, we study the energy efficiency problem from both device and network perspectives. From the device point of view, we introduce a new angle to address the battery life concern. We recognize that the value of battery for the users is not always the same, and that it depends on the user usage. We also identify, and show in real network, diversity of usage, the phenomenon that at any instant, there is a diverse distribution of smartphone usage among cellular users. We propose "Battery Deposit Service" (BDS), a cooperative system which makes use of device-to-device (D2D) communications underlaying cellular networks to provide energy sharing in the form of load sharing. We design BDS to take advantage of diversity of usage to maximize the utility of smartphone battery. We show that our system increases battery life of cellular users, at almost no cost to the rest of the network. BDS is designed to be compatible to LTE architecture. From the network point of view, we design an energy efficient D2D relay system underlaying LTE networks. We minimize transmission power of smartphones by considering relay selection, resource allocation and power control. The overall problem is prohibited due to its exponential search space. We develop a divideand-conquer strategy which splits the overall problem into small sub-problems. We relate these sub-problems to well-studied graph theoretic problems, and take advantage of existing fast algorithms. We show that our algorithms meet the runtime requirement of real-time LTE operations. In the second part of the dissertation, we address a privacy concern in LTE networks. In particular, we show that user location can be leaked in current LTE paging architecture. We propose a mechanism based on signal processing to remedy this vulnerability. Our method makes use of physical layer identification, which are low-power tags embedded on the wireless waveform, to signal paging messages to user devices. We show that our method is stealthy and robust, and that it mitigates the aforementioned privacy issue.
Research Handbook on Jurisdiction and Immunities in International Law
RCADI 1 at 15 (stating that '[j]urisdiction … is concerned with what has been described as one of... more RCADI 1 at 15 (stating that '[j]urisdiction … is concerned with what has been described as one of the fundamental functions of public international law, viz. the function of regulating and delimiting the respective competences of States'.). Also A.F. Lowenfeld, 'International Litigation and the Quest for Reasonableness' (1994-I) 245 RCADI 9 at 29 ('I believe that while we will not here address the cosmic issues of war and peace, of nuclear weapons and terrorist assaults, we will deal with legitimate and serious concerns of private persons and of States, and surely of lawyers, embraced within what Story calls the comity of nations').
This article presents the results of our study, in which blends of nitrile rubber (NBR) and photo... more This article presents the results of our study, in which blends of nitrile rubber (NBR) and photoresists (PR) are prepared in order to fix PR, forming monolith blocks with properties suitable for use as recycled materials. In the study, cashew oil, a popular material on the market, is used as compatabilizer. With 1 % of cashew oil, the resultant blends demonstrated improved properties such as swelling in water as well as mechanical strengths and ageing strength in water and oil. The use of the compatabilizer also allowed increasing the maximum content of PR in blends to 60 % from 20 % (in control samples) without reduction of mechanical strengths. Analyses of phasic morphology via SEM photos and acrylate flexibility indicated the high environmental stability of samples. Satisfactory to Vietnamese standard TCVN 2749-78, PR-containing recycled materials can be used in production of environmental stable and cost-effective O-rings, targets, washers, antishock rings, etc..
Inhibition of insulin amyloid fibrillization by glyco-acridines: an in vitro and in silico study
MedChemComm, 2015
The structure of glyco-acridines determines their impact on insulin amyloid aggregation and newly... more The structure of glyco-acridines determines their impact on insulin amyloid aggregation and newly introduced geometrical descriptors allow us to distinguish different binding affinities.
Texture evolution during asymmetrical warm rolling and subsequent annealing of electrical steel
Materials Science Forum, 2012
The core loss and magnetic induction of electrical steels are dependent on the microstructure and... more The core loss and magnetic induction of electrical steels are dependent on the microstructure and texture of the material, which are produced by the thermo-mechanical processing. After a conventional rolling process, crystal orientations of the α-(//RD) and γ-(//ND) fibers are strongly present in the final texture. These fibers have a drastically negative effect on the magnetic properties of electrical steels. By applying asymmetric rolling, significant shear strains could be introduced across the thickness of the sheet and thus a deformation texture with more magnetically favorable components is expected. In this study, an electrical steel of 1.23 wt.% Si was subjected to asymmetric warm rolling in a rolling mill with different roll diameters. The evolutions of both deformed and annealed textures were investigated. The texture evolution during asymmetric warm rolling was analyzed by crystal plasticity simulations using the ALAMEL model. A good fit between measured and calculated textures was obtained. The annealing texture could be understood in terms of an oriented nucleation model that selects crystal orientations with a lower than average stored energy of plastic deformation.
Texture control in steel and aluminium alloys by rolling and recrystallization in non-conventional sheet manufacturing
The sheet manufacturing process, which involves various solid-state transformations such as phase... more The sheet manufacturing process, which involves various solid-state transformations such as phase transformations, plastic deformation and thermally activated recovery processes, determines the texture of steel and aluminium sheet. The conventional process of flat rolling and annealing only offers limited degrees of freedom to modify the texture of the final product. After annealing a {111} recrystallization fibre in BCC alloys and a cube dominated recrystallization texture in FCC metals is commonly obtained. Many applications, however, require other texture components than the ones achievable by conventional processing. In the present paper it is shown that by asymmetric rolling of a Si-alloyed ultra-low carbon steel a texture can be obtained with increased intensity on the {001} fibre, which is of interest for magnetic applications. Also in aluminium alloys the strong cube annealing texture can be drastically modified by the process of asymmetric rolling. It is argued that by observing the proper rolling and annealing conditions a recrystallization texture with improved normal and planar anisotropy of the mechanical properties may be produced.
Practical Handbook of Advanced Interventional Cardiology
*Basic; **Advanced; ***Rare, exotic, or investigational. $ 100.00 $US extra; $$ 100.00 $US extra ... more *Basic; **Advanced; ***Rare, exotic, or investigational. $ 100.00 $US extra; $$ 100.00 $US extra 10 minutes extra; 10 minutes extra low risk of complications; high risk of complications ... Practical Handbook of Advanced Interventional Cardiology: Tips and Tricks, Third Edition Edited by ...
A novel broadband electromagnetic band-gap based on Sierpinski Gasket triangles
2012 Fourth International Conference on Communications and Electronics (ICCE), 2012
The characteristics of a novel broadband electromagnetic band-gap (EBG) design based on Sierpinsk... more The characteristics of a novel broadband electromagnetic band-gap (EBG) design based on Sierpinski Gasket triangles are presented in this paper. These triangles, which are the equilateral triangles, are arrangement repeated each 600 to introduce the hexagonal unit cells without vias. Model of this EBG structure have been developed and constructed on an inexpensive Fire-Retardant 4 (FR4) with thickness of 1.6mm and relative permittivity of 4.4. Direct transmission method is used to determine the band-gap of the EBG structure. The EBG operation bandwidth is about 87% at the center band-gap frequency.
This paper introduces a general concept of convolutions by means of the theory of reproducing ker... more This paper introduces a general concept of convolutions by means of the theory of reproducing kernels which turns out to be useful for several concrete examples and applications. Consequent properties are exposed (including, in particular, associated norm inequalities).
A Fe 3 O 4 based magnetic fluid with different concentrations ranged between 0.15 ng/cell to 10 n... more A Fe 3 O 4 based magnetic fluid with different concentrations ranged between 0.15 ng/cell to 10 ng/cell (nano gram/cell) was used in the in vitro toxicity test on several cancer cell lines, Sarcoma 180, HeLa and H358. It shows that the fluid with a concentration of Fe 3 O 4 below 1.2 ng/cell is completely non-toxic for these cell lines. Even through in the presence of the highest concentration of 10 ng/cell, the cell viability still reaches more than 60%. The magnetic fluid with Fe 3 O 4 concentration of about 0.1 ng/cell was also used to search ex-vivo the possibility of Sarcoma 180 extermination by magnetic heating with an AC field of 120Oe and 184 KHz. The result shows that after a heat treatment for 30 min., 40% of Sarcoma 180 cells was killed.
We consider the problem of identifying the pollution source of a 1D parabolic equation from the i... more We consider the problem of identifying the pollution source of a 1D parabolic equation from the initial and the final data. The problem is ill posed and regularization is in order. Using the quasi-boundary method and the truncation Fourier method, we present two regularization methods. Error estimates are given and the methods are illustrated by numerical experiments.
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