Hoang Trang - Academia.edu (original) (raw)

Papers by Hoang Trang

BioMed Research International, 2021

The lung organ of human anatomy captured by a medical device reveals inhalation and exhalation in... more The lung organ of human anatomy captured by a medical device reveals inhalation and exhalation information for treatment and monitoring. Given a large number of slices covering an area of the lung, we have a set of three-dimensional lung data. And then, by combining additionally with breath-hold measurements, we have a dataset of multigroup CT images (called 4DCT image set) that could show the lung motion and deformation over time. Up to now, it has still been a challenging problem to model a respiratory signal representing patients' breathing motion as well as simulating inhalation and exhalation process from 4DCT lung images because of its complexity. In this paper, we propose a promising hybrid approach incorporating the local binary pattern (LBP) histogram with entropy comparison to register the lung images. The segmentation process of the left and right lung is completely overcome by the minimum variance quantization and within class variance techniques which help the regis...

Indonesian Journal of Electrical Engineering and Computer Science, 2021

Ternary content addressable memory (TCAM) is a memory that allows high speed searching for data. ... more Ternary content addressable memory (TCAM) is a memory that allows high speed searching for data. Not only it is acknowledged as associative memory/storage but also TCAM can compare input searching content (key) against a collection of accumulated data and return the matching address which compatible with this input search data. SRAM-based TCAM utilizes and allocates blocks RAM to perform application of TCAM on FPGA hardware. This paper presents a design of 480×104 bit SRAM-based TCAM on altera cyclone IV FPGA. Our design achieved lookup rate over 150 millions input search data and update speed at 75 million rules per second. The architecture is configurable, allowing various performance trade-offs to be exploited for different ruleset characteristics.

In this paper, we propose a new asynchronous method based on a Null Convention Logic (NCL) to imp... more In this paper, we propose a new asynchronous method based on a Null Convention Logic (NCL) to improve power consumption for low power integrated circuits. The reason is because the NCL based designs do not use a clock, it eliminates the problems related to the clock and its power consumption reduces significantly. To show the advantages of the selected method, we propose two design models using the synchronous circuit design method, and the NCL based asynchronous circuit design method. To test these two design models conveniently, we also propose an extra automatic test model. In this study, the AES decryption is used as an example to illustrate both methods. The two above proposed AES decryption models are simulated and synthesized at the various corners by VCS and Design Compiler tool using TSMC standard cell libraries in 65nm technology. The synthesis results of the two above mentioned models indicated that the power consumption of the NCL based asynchronous circuit model is 3 ti...

ACS Omega, 2021

Gas-phase mechanism and kinetics of the formation and decomposition reactions of the C 4 H 3 O co... more Gas-phase mechanism and kinetics of the formation and decomposition reactions of the C 4 H 3 O compound, a crucial intermediate of the atmospheric and combustion chemistry, were investigated using ab initio molecular orbital theory and the very expensive coupled-cluster CCSD(T)/CBS(T,Q,5)//B3LYP/6-311++G(3df,2p) method together with transition state theory and Rice−Ramsperger−Kassel−Macus kinetic predictions. The potential energy surface established shows that the C 3 H 3 + CO addition reaction has four main entrances in which C 3 H 3 + CO → IS1-cis (CHCCH 2 CO) is the most energetically favorable channel. The calculated results revealed that the bimolecular rate constants are positively dependent on both temperatures (T = 300−2000 K) and pressures (P = 1−76,000 Torr). Of these values, the k 1 rate constant of the C 3 H 3 + CO → IS1-cis addition channel is dominant over the 300−2000 K temperature range, increasing from 1.53 × 10 −20 to 1.04 × 10 −13 cm 3 molecule −1 s −1 with the branching ratio reducing from 62% to 44%. The predicted unimolecular rate coefficients in the ranges of T = 300−2000 K and P = 1−76,000 Torr revealed that the intermediate products IS1cis, IS1-trans, and IS2 are rather unstable and would rapidly decompose back to the reactants (C 3 H 3 + CO), especially at high temperatures (T > 1000 K). The high-pressure limit rate constants for the C 4 H 3 O decomposition leading to products (C 3 H 3 + CO), (CHCCHCO + H), and (CHCO + C 2 H 2) have been found to be in excellent agreement with the available literature values proposed by Tian et al. (Combust. Flame, 2011, 158, 756−773) without any adjustment from the ab initio calculations. Therefore, the predicted temperature-and pressure-dependent rate constants can be confidently used for modeling CO-related systems under atmospheric and combustion conditions.

International Journal of Advanced Engineering, Management and Science, 2020

SPDs manufactured using multi-block MOV technology can indicate the remaining life (in %) of the ... more SPDs manufactured using multi-block MOV technology can indicate the remaining life (in %) of the SPD, thus helping users to plan appropriate replacement and maintenance. However, because the threshold voltage error of parallel-coupled MOV elements is not the same, the rated impulse current of the SPD manufactured by multi-block MOV technology is not equal to the total of the rated impulse current of parallelcoupled MOV elements. The paper presents the method of determining the number of parallel MOV elements of multi-block MOV according to the allowed dissipation energy method with the help of Matlab software and modelling and simulation technique.

Journal of IKEEE, 2013

This paper presents the design of a System on Programmable Chip (SoPC) based on Field Programmabl... more This paper presents the design of a System on Programmable Chip (SoPC) based on Field Programmable Gate Array (FPGA) for speech recognition in which Mel-Frequency Cepstral Coefficients (MFCC) for speech feature extraction and Vector Quantization for recognition are used. The implementing process of the speech recognition system undergoes the following steps: feature extraction, training codebook, recognition. In the first step of feature extraction, the input voice data will be transformed into spectral components and extracted to get the main features by using MFCC algorithm. In the recognition step, the obtained spectral features from the first step will be processed and compared with the trained components. The Vector Quantization (VQ) is applied in this step. In our experiment, Altera's DE2 board with Cyclone II FPGA is used to implement the recognition system which can recognize 64 words. The execution speed of the blocks in the speech recognition system is surveyed by calculating the number of clock cycles while executing each block. The recognition accuracies are also measured in different parameters of the system. These results in execution speed and recognition accuracy could help the designer to choose the best configurations in speech recognition on SoPC.

Applied Radiation and Isotopes, 2016

In this work, segmented gamma scanning and the gamma emission tomography were used to locate unkn... more In this work, segmented gamma scanning and the gamma emission tomography were used to locate unknown sources in a radioactive waste drum. The simulated detector response function and full energy peak efficiency are compared to corresponding experimental data and show about 5.3% difference for an energy ranging from 81keV to 1332.5keV for point sources. Computation of the corresponding activity is in good agreement with the true values.

The Embedded Block Coding with Optimized Truncation (EBCOT) consists of Bit-Plane Coding (BPC) an... more The Embedded Block Coding with Optimized Truncation (EBCOT) consists of Bit-Plane Coding (BPC) and MQ-coder, is one of key algorithms of JPEG2000 compression system. However, this coder block takes the majority of compressing time because of individual bit processing routine. In this paper, the efficient pipeline architecture for MQ-Coder is introduced to achieve high operation frequency and 100% of the throughput. The pipeline technique based structure is proposed and allow the JPEG2000 compression system to achieve high clock rate, increase the data rate. In addition, the architecture uses Streaming Bus to synchronize pixel and bit-stream easily in the compressed image. The introduced architecture is implemented on different FPGA platforms and it operates at 151.68 MHz, processes 151.68 mega sample per second with the reasonable hardware resource (1373 LEs and 714 registers) on Altera -EP3SL50F484C2 FPGA platform. Trong hh thhng nén nh JPEG2000, EBCOT (Embedded Block Coding with O...

Advanced Industrial Conference on Telecommunications/Service Assurance with Partial and Intermittent Resources Conference/E-Learning on Telecommunications Workshop (AICT/SAPIR/ELETE'05), 2005

The MIMO system (multiple antennas at the transmitter and receiver) is capable of very high theor... more The MIMO system (multiple antennas at the transmitter and receiver) is capable of very high theoretical capacities. As an important space-time code, V-BLAST (Vertical-Bell Lab Layered Space-Time) code has been researched recently. However, most research in this area has assumed that the antennas are decorrelated to each other at both ends. Unfortunately, in practice, this assumption is not satisfied. This paper introduces a model for correlated channel matrix, and as a result the degradation of BER performance can be simulated without the constraint of the number of antennas. In addition, the stochastic property of SNR of the received signal is demonstrated, and the analytical upper bound of the average probability of error for Zero-Forcing V-BLAST under correlated Rayleigh fading channels is derived. The simulation will verify the analysis.

2014 International Conference on Advanced Technologies for Communications (ATC 2014), 2014

Speech recognition is the important problem in pattern recognition research field. In this paper,... more Speech recognition is the important problem in pattern recognition research field. In this paper, the kernel ridge regression method is proposed to be applied to the MFCC feature vectors of the speech dataset available from IC Design lab at Faculty of Electricals-Electronics Engineering, University of Technology, Ho Chi Minh City. Experiment results show that the kernel ridge regression method outperforms the current state of the art Hidden Markov Model method in speech recognition problem in terms of sensitivity performance measure and calculation speed of training process.

2014 International Conference on Advanced Technologies for Communications (ATC 2014), 2014

In speech recognition system, the Mel Frequency Cepstrum Coefficients (i.e. MFCC) feature extract... more In speech recognition system, the Mel Frequency Cepstrum Coefficients (i.e. MFCC) feature extraction is an important process. It has also been wildly used in many applications. In this paper, we present the conventional MFCC feature extraction method and propose two novel versions of MFCC method that will combine the PCA technique and conventional MFCC feature extraction method. Finally, these three different MFCC methods will be tested in terms of recognition accuracy and the execution time of the HMM training process. From these two measures (i.e. recognition accuracy and time complexity of HMM training process), the developers can choose the appropriate MFCC method for the speech recognition application.

2007 International Conference on Perspective Technologies and Methods in MEMS Design, 2007

... h2 HOANG Trang, REY Patrice, VAUDAINE Marie-Helene, DANEL Jean-Sébastien, ROBERT Philippe Het... more ... h2 HOANG Trang, REY Patrice, VAUDAINE Marie-Helene, DANEL Jean-Sébastien, ROBERT Philippe Heterogeneous Silicon Integration Department, CEA/LETI, 17 rue des Martyrs, Grenoble, France trang.hoang@cea.fr BENECH Philippe, LEMAITRE-AUGER Pierre Institute of ...

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2015

Speech recognition is the important problem in pattern recognition research field. In this paper,... more Speech recognition is the important problem in pattern recognition research field. In this paper, the un-normalized, symmetric normalized, and random walk graph Laplacian based semi-supervised learning methods will be applied to the network derived from the MFCC feature vectors of the speech dataset. Experiment results show that the performance of the random walk and the symmetric normalized graph Laplacian based methods are at least as good as the performance of the un-normalized graph Laplacian based method. Moreover, the sensitivity measures of these three semi-supervised learning methods are much better than the sensitivity measure of the current state of the art Hidden Markov Model method in speech recognition problem.

International Journal of Distributed Systems and Technologies, 2013

This paper presents a Field-Programmable Gate Array (FPGA) implementation of an Advanced Encrypti... more This paper presents a Field-Programmable Gate Array (FPGA) implementation of an Advanced Encryption Standard (AES) algorithm using approach of combination iterative looping and Look-Up Table (LUT)-based S-box with block and key size of 128 bits. Modifications in the way of loading data out in AES encryption/decryption, loading key_expansion in Key_Expansion blocks are also proposed. The design is tested with the sample vectors provided by Federal Information Processing Standard (FIPS) 197. The design is implemented on APEX20KC Altera’s FPGA and on Virtex XCV600 Xilinx’s FPGA. For all the authors’ proposals, they are found to be very simple in FPGA-based architecture implementation, better in low latency, and small area, but large in memory, moderate throughput.

IFMBE Proceedings, 2013

The design technique of using gray code addressing to reduce power dissipation in CPU of pacemake... more The design technique of using gray code addressing to reduce power dissipation in CPU of pacemaker is presented in this paper. The experimental results of reducing power up to 20% would be a promising result. This work is implemented by using Altera Quartus II 9.0, the device Cylone II EP2C20F484C7 is used.

The 2012 International Conference on Advanced Technologies for Communications, 2012

This study presents power gating techniques to reduce the power consumption in pacemaker device. ... more This study presents power gating techniques to reduce the power consumption in pacemaker device. A novel structure based on power technique in pacemaker device is presented. Experimental results in power reduction and cost overhead by using proposed structure are given. The result in saving power consumption-up to 25%- would be promising because the structure could last usage time of pacemaker device longer than normal structure. However, the cost overhead appears but is smaller than 0.65% in indicators of logic element, combinational function, and logic register.

IFMBE Proceedings, 2013

Electronics used in medical applications attract lots of researches on it, consequently more pati... more Electronics used in medical applications attract lots of researches on it, consequently more patients will be treated and have a healthy life. The analog-to-digital converter (ADC) is the inter-connection between the analog and digital part of a device, plays an important role transferring signals in real life to signals in digital domain. One requirement for this ADC is how to reduce power dissipation that can afford devices using battery source. A MDAC (Multiplying Digital to Analog Converter) using charge-pump capacitor technique is introduced for pipelined ADC topology. Compared with the switch-cap technique, MDAC using charge-pump technique consumes less power, hence reducing the total power used in the device. This MDAC is proposed for 1.5-bit stage pipelined ADC, using UMC 0.25μm technology, 2.5V supply and 0.5Mhz sampling rate.

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2015

Most network-based clustering methods are based on the assumption that the labels of two adjacent... more Most network-based clustering methods are based on the assumption that the labels of two adjacent vertices in the network are likely to be the same. However, assuming the pairwise relationship between vertices is not complete. The information a group of vertices that show very similar patterns and tend to have similar labels is missed. The natural way overcoming the information loss of the above assumption is to represent the given data as the hypergraph. Thus, in this paper, the two un-normalized and random walk hypergraph Laplacian based un-supervised learning methods are introduced. Experiment results show that the accuracy performance measures of these two hypergraph Laplacian based un-supervised learning methods are greater than the accuracy performance measure of symmetric normalized graph Laplacian based un-supervised learning method (i.e. the baseline method of this paper) applied to simple graph created from the incident matrix of hypergraph.

Lecture Notes in Computer Science, 2014

The biological motivated problem that we want to solve in this paper is to predict the new member... more The biological motivated problem that we want to solve in this paper is to predict the new members of a partially known protein complex (i.e. complex membership determination). In this problem, we are given a core set of proteins (i.e. the queries) making up a protein complex. However, the biologist experts do not know whether this core set is complete or not. Our objective is to find more potential members of the protein complex by ranking proteins in protein-protein interaction network. One of the solutions to this problem is a network reliability based method. Due to high time complexity of this method, the random walk on graphs method has been proposed to solve this complex membership determination problem. However, the random walk on graphs method is not the current state of the art network-based method solving bioinformatics problem. In this paper, the novel un-normalized graph (p-) Laplacian based ranking method will be developed based on the un-normalized graph p-Laplacian operator definitions such as the curvature operator of graph (i.e. the un-normalized graph 1-Laplacian operator) and will be used to solve the complex membership determination problem. The results from experiments shows that the un-normalized graph p-Laplacian ranking methods are at least as good as the current state of the art network-based ranking method (p=2) but often lead to better ranking accuracy performance measures.

Molecular Genetics and Metabolism, 2001

Serum calcium is under tight physiological control, but it is also a quantitative trait with subs... more Serum calcium is under tight physiological control, but it is also a quantitative trait with substantial genetic regulation. Mutations of the CASR gene cause familial hypocalciuric hypercalcemia or autosomal dominant hypoparathyroidism, depending on whether they decrease or increase, respectively, ligand binding to the receptor protein. We described an association between ionized calcium and a common polymorphism (A986S) found in the cytoplasmic tail of this G protein-coupled receptor. We report here on an independent study of 387 healthy young women. Genotyping was performed by allele-specific amplification and serum chemistries were measured by automated clinical assay. Frequencies of SS, AS, and AA genotypes were 6, 107, and 274, respectively, yielding a 986S allele frequency of 15.4%. Mean total serum calcium (Ca T) was significantly higher in the SS (9.88 ؎ 0.29 mg/dL, P ‫؍‬ 0.015) and AS groups (9.45 ؎ 0.05 mg/dL, P ‫؍‬ 0.002), than in the AA group (9.23 ؎ 0.04 mg/dL). In multiple regression modeling, the A986S genotype remained an independently significant predictor of Ca T (P < 0.0001) when serum albumin, globulin, inorganic phosphate, and creatinine covariates were included. These data are the first to show significant association between a common polymorphism and concentrations of a serum electrolyte. The A986S polymorphism is also a potential predisposing factor in disorders of bone and mineral metabolism.

BioMed Research International, 2021

The lung organ of human anatomy captured by a medical device reveals inhalation and exhalation in... more The lung organ of human anatomy captured by a medical device reveals inhalation and exhalation information for treatment and monitoring. Given a large number of slices covering an area of the lung, we have a set of three-dimensional lung data. And then, by combining additionally with breath-hold measurements, we have a dataset of multigroup CT images (called 4DCT image set) that could show the lung motion and deformation over time. Up to now, it has still been a challenging problem to model a respiratory signal representing patients' breathing motion as well as simulating inhalation and exhalation process from 4DCT lung images because of its complexity. In this paper, we propose a promising hybrid approach incorporating the local binary pattern (LBP) histogram with entropy comparison to register the lung images. The segmentation process of the left and right lung is completely overcome by the minimum variance quantization and within class variance techniques which help the regis...

Indonesian Journal of Electrical Engineering and Computer Science, 2021

Ternary content addressable memory (TCAM) is a memory that allows high speed searching for data. ... more Ternary content addressable memory (TCAM) is a memory that allows high speed searching for data. Not only it is acknowledged as associative memory/storage but also TCAM can compare input searching content (key) against a collection of accumulated data and return the matching address which compatible with this input search data. SRAM-based TCAM utilizes and allocates blocks RAM to perform application of TCAM on FPGA hardware. This paper presents a design of 480×104 bit SRAM-based TCAM on altera cyclone IV FPGA. Our design achieved lookup rate over 150 millions input search data and update speed at 75 million rules per second. The architecture is configurable, allowing various performance trade-offs to be exploited for different ruleset characteristics.

In this paper, we propose a new asynchronous method based on a Null Convention Logic (NCL) to imp... more In this paper, we propose a new asynchronous method based on a Null Convention Logic (NCL) to improve power consumption for low power integrated circuits. The reason is because the NCL based designs do not use a clock, it eliminates the problems related to the clock and its power consumption reduces significantly. To show the advantages of the selected method, we propose two design models using the synchronous circuit design method, and the NCL based asynchronous circuit design method. To test these two design models conveniently, we also propose an extra automatic test model. In this study, the AES decryption is used as an example to illustrate both methods. The two above proposed AES decryption models are simulated and synthesized at the various corners by VCS and Design Compiler tool using TSMC standard cell libraries in 65nm technology. The synthesis results of the two above mentioned models indicated that the power consumption of the NCL based asynchronous circuit model is 3 ti...

ACS Omega, 2021

Gas-phase mechanism and kinetics of the formation and decomposition reactions of the C 4 H 3 O co... more Gas-phase mechanism and kinetics of the formation and decomposition reactions of the C 4 H 3 O compound, a crucial intermediate of the atmospheric and combustion chemistry, were investigated using ab initio molecular orbital theory and the very expensive coupled-cluster CCSD(T)/CBS(T,Q,5)//B3LYP/6-311++G(3df,2p) method together with transition state theory and Rice−Ramsperger−Kassel−Macus kinetic predictions. The potential energy surface established shows that the C 3 H 3 + CO addition reaction has four main entrances in which C 3 H 3 + CO → IS1-cis (CHCCH 2 CO) is the most energetically favorable channel. The calculated results revealed that the bimolecular rate constants are positively dependent on both temperatures (T = 300−2000 K) and pressures (P = 1−76,000 Torr). Of these values, the k 1 rate constant of the C 3 H 3 + CO → IS1-cis addition channel is dominant over the 300−2000 K temperature range, increasing from 1.53 × 10 −20 to 1.04 × 10 −13 cm 3 molecule −1 s −1 with the branching ratio reducing from 62% to 44%. The predicted unimolecular rate coefficients in the ranges of T = 300−2000 K and P = 1−76,000 Torr revealed that the intermediate products IS1cis, IS1-trans, and IS2 are rather unstable and would rapidly decompose back to the reactants (C 3 H 3 + CO), especially at high temperatures (T > 1000 K). The high-pressure limit rate constants for the C 4 H 3 O decomposition leading to products (C 3 H 3 + CO), (CHCCHCO + H), and (CHCO + C 2 H 2) have been found to be in excellent agreement with the available literature values proposed by Tian et al. (Combust. Flame, 2011, 158, 756−773) without any adjustment from the ab initio calculations. Therefore, the predicted temperature-and pressure-dependent rate constants can be confidently used for modeling CO-related systems under atmospheric and combustion conditions.

International Journal of Advanced Engineering, Management and Science, 2020

SPDs manufactured using multi-block MOV technology can indicate the remaining life (in %) of the ... more SPDs manufactured using multi-block MOV technology can indicate the remaining life (in %) of the SPD, thus helping users to plan appropriate replacement and maintenance. However, because the threshold voltage error of parallel-coupled MOV elements is not the same, the rated impulse current of the SPD manufactured by multi-block MOV technology is not equal to the total of the rated impulse current of parallelcoupled MOV elements. The paper presents the method of determining the number of parallel MOV elements of multi-block MOV according to the allowed dissipation energy method with the help of Matlab software and modelling and simulation technique.

Journal of IKEEE, 2013

This paper presents the design of a System on Programmable Chip (SoPC) based on Field Programmabl... more This paper presents the design of a System on Programmable Chip (SoPC) based on Field Programmable Gate Array (FPGA) for speech recognition in which Mel-Frequency Cepstral Coefficients (MFCC) for speech feature extraction and Vector Quantization for recognition are used. The implementing process of the speech recognition system undergoes the following steps: feature extraction, training codebook, recognition. In the first step of feature extraction, the input voice data will be transformed into spectral components and extracted to get the main features by using MFCC algorithm. In the recognition step, the obtained spectral features from the first step will be processed and compared with the trained components. The Vector Quantization (VQ) is applied in this step. In our experiment, Altera's DE2 board with Cyclone II FPGA is used to implement the recognition system which can recognize 64 words. The execution speed of the blocks in the speech recognition system is surveyed by calculating the number of clock cycles while executing each block. The recognition accuracies are also measured in different parameters of the system. These results in execution speed and recognition accuracy could help the designer to choose the best configurations in speech recognition on SoPC.

Applied Radiation and Isotopes, 2016

In this work, segmented gamma scanning and the gamma emission tomography were used to locate unkn... more In this work, segmented gamma scanning and the gamma emission tomography were used to locate unknown sources in a radioactive waste drum. The simulated detector response function and full energy peak efficiency are compared to corresponding experimental data and show about 5.3% difference for an energy ranging from 81keV to 1332.5keV for point sources. Computation of the corresponding activity is in good agreement with the true values.

The Embedded Block Coding with Optimized Truncation (EBCOT) consists of Bit-Plane Coding (BPC) an... more The Embedded Block Coding with Optimized Truncation (EBCOT) consists of Bit-Plane Coding (BPC) and MQ-coder, is one of key algorithms of JPEG2000 compression system. However, this coder block takes the majority of compressing time because of individual bit processing routine. In this paper, the efficient pipeline architecture for MQ-Coder is introduced to achieve high operation frequency and 100% of the throughput. The pipeline technique based structure is proposed and allow the JPEG2000 compression system to achieve high clock rate, increase the data rate. In addition, the architecture uses Streaming Bus to synchronize pixel and bit-stream easily in the compressed image. The introduced architecture is implemented on different FPGA platforms and it operates at 151.68 MHz, processes 151.68 mega sample per second with the reasonable hardware resource (1373 LEs and 714 registers) on Altera -EP3SL50F484C2 FPGA platform. Trong hh thhng nén nh JPEG2000, EBCOT (Embedded Block Coding with O...

Advanced Industrial Conference on Telecommunications/Service Assurance with Partial and Intermittent Resources Conference/E-Learning on Telecommunications Workshop (AICT/SAPIR/ELETE'05), 2005

The MIMO system (multiple antennas at the transmitter and receiver) is capable of very high theor... more The MIMO system (multiple antennas at the transmitter and receiver) is capable of very high theoretical capacities. As an important space-time code, V-BLAST (Vertical-Bell Lab Layered Space-Time) code has been researched recently. However, most research in this area has assumed that the antennas are decorrelated to each other at both ends. Unfortunately, in practice, this assumption is not satisfied. This paper introduces a model for correlated channel matrix, and as a result the degradation of BER performance can be simulated without the constraint of the number of antennas. In addition, the stochastic property of SNR of the received signal is demonstrated, and the analytical upper bound of the average probability of error for Zero-Forcing V-BLAST under correlated Rayleigh fading channels is derived. The simulation will verify the analysis.

2014 International Conference on Advanced Technologies for Communications (ATC 2014), 2014

Speech recognition is the important problem in pattern recognition research field. In this paper,... more Speech recognition is the important problem in pattern recognition research field. In this paper, the kernel ridge regression method is proposed to be applied to the MFCC feature vectors of the speech dataset available from IC Design lab at Faculty of Electricals-Electronics Engineering, University of Technology, Ho Chi Minh City. Experiment results show that the kernel ridge regression method outperforms the current state of the art Hidden Markov Model method in speech recognition problem in terms of sensitivity performance measure and calculation speed of training process.

2014 International Conference on Advanced Technologies for Communications (ATC 2014), 2014

In speech recognition system, the Mel Frequency Cepstrum Coefficients (i.e. MFCC) feature extract... more In speech recognition system, the Mel Frequency Cepstrum Coefficients (i.e. MFCC) feature extraction is an important process. It has also been wildly used in many applications. In this paper, we present the conventional MFCC feature extraction method and propose two novel versions of MFCC method that will combine the PCA technique and conventional MFCC feature extraction method. Finally, these three different MFCC methods will be tested in terms of recognition accuracy and the execution time of the HMM training process. From these two measures (i.e. recognition accuracy and time complexity of HMM training process), the developers can choose the appropriate MFCC method for the speech recognition application.

2007 International Conference on Perspective Technologies and Methods in MEMS Design, 2007

... h2 HOANG Trang, REY Patrice, VAUDAINE Marie-Helene, DANEL Jean-Sébastien, ROBERT Philippe Het... more ... h2 HOANG Trang, REY Patrice, VAUDAINE Marie-Helene, DANEL Jean-Sébastien, ROBERT Philippe Heterogeneous Silicon Integration Department, CEA/LETI, 17 rue des Martyrs, Grenoble, France trang.hoang@cea.fr BENECH Philippe, LEMAITRE-AUGER Pierre Institute of ...

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2015

Speech recognition is the important problem in pattern recognition research field. In this paper,... more Speech recognition is the important problem in pattern recognition research field. In this paper, the un-normalized, symmetric normalized, and random walk graph Laplacian based semi-supervised learning methods will be applied to the network derived from the MFCC feature vectors of the speech dataset. Experiment results show that the performance of the random walk and the symmetric normalized graph Laplacian based methods are at least as good as the performance of the un-normalized graph Laplacian based method. Moreover, the sensitivity measures of these three semi-supervised learning methods are much better than the sensitivity measure of the current state of the art Hidden Markov Model method in speech recognition problem.

International Journal of Distributed Systems and Technologies, 2013

This paper presents a Field-Programmable Gate Array (FPGA) implementation of an Advanced Encrypti... more This paper presents a Field-Programmable Gate Array (FPGA) implementation of an Advanced Encryption Standard (AES) algorithm using approach of combination iterative looping and Look-Up Table (LUT)-based S-box with block and key size of 128 bits. Modifications in the way of loading data out in AES encryption/decryption, loading key_expansion in Key_Expansion blocks are also proposed. The design is tested with the sample vectors provided by Federal Information Processing Standard (FIPS) 197. The design is implemented on APEX20KC Altera’s FPGA and on Virtex XCV600 Xilinx’s FPGA. For all the authors’ proposals, they are found to be very simple in FPGA-based architecture implementation, better in low latency, and small area, but large in memory, moderate throughput.

IFMBE Proceedings, 2013

The design technique of using gray code addressing to reduce power dissipation in CPU of pacemake... more The design technique of using gray code addressing to reduce power dissipation in CPU of pacemaker is presented in this paper. The experimental results of reducing power up to 20% would be a promising result. This work is implemented by using Altera Quartus II 9.0, the device Cylone II EP2C20F484C7 is used.

The 2012 International Conference on Advanced Technologies for Communications, 2012

This study presents power gating techniques to reduce the power consumption in pacemaker device. ... more This study presents power gating techniques to reduce the power consumption in pacemaker device. A novel structure based on power technique in pacemaker device is presented. Experimental results in power reduction and cost overhead by using proposed structure are given. The result in saving power consumption-up to 25%- would be promising because the structure could last usage time of pacemaker device longer than normal structure. However, the cost overhead appears but is smaller than 0.65% in indicators of logic element, combinational function, and logic register.

IFMBE Proceedings, 2013

Electronics used in medical applications attract lots of researches on it, consequently more pati... more Electronics used in medical applications attract lots of researches on it, consequently more patients will be treated and have a healthy life. The analog-to-digital converter (ADC) is the inter-connection between the analog and digital part of a device, plays an important role transferring signals in real life to signals in digital domain. One requirement for this ADC is how to reduce power dissipation that can afford devices using battery source. A MDAC (Multiplying Digital to Analog Converter) using charge-pump capacitor technique is introduced for pipelined ADC topology. Compared with the switch-cap technique, MDAC using charge-pump technique consumes less power, hence reducing the total power used in the device. This MDAC is proposed for 1.5-bit stage pipelined ADC, using UMC 0.25μm technology, 2.5V supply and 0.5Mhz sampling rate.

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2015

Most network-based clustering methods are based on the assumption that the labels of two adjacent... more Most network-based clustering methods are based on the assumption that the labels of two adjacent vertices in the network are likely to be the same. However, assuming the pairwise relationship between vertices is not complete. The information a group of vertices that show very similar patterns and tend to have similar labels is missed. The natural way overcoming the information loss of the above assumption is to represent the given data as the hypergraph. Thus, in this paper, the two un-normalized and random walk hypergraph Laplacian based un-supervised learning methods are introduced. Experiment results show that the accuracy performance measures of these two hypergraph Laplacian based un-supervised learning methods are greater than the accuracy performance measure of symmetric normalized graph Laplacian based un-supervised learning method (i.e. the baseline method of this paper) applied to simple graph created from the incident matrix of hypergraph.

Lecture Notes in Computer Science, 2014

The biological motivated problem that we want to solve in this paper is to predict the new member... more The biological motivated problem that we want to solve in this paper is to predict the new members of a partially known protein complex (i.e. complex membership determination). In this problem, we are given a core set of proteins (i.e. the queries) making up a protein complex. However, the biologist experts do not know whether this core set is complete or not. Our objective is to find more potential members of the protein complex by ranking proteins in protein-protein interaction network. One of the solutions to this problem is a network reliability based method. Due to high time complexity of this method, the random walk on graphs method has been proposed to solve this complex membership determination problem. However, the random walk on graphs method is not the current state of the art network-based method solving bioinformatics problem. In this paper, the novel un-normalized graph (p-) Laplacian based ranking method will be developed based on the un-normalized graph p-Laplacian operator definitions such as the curvature operator of graph (i.e. the un-normalized graph 1-Laplacian operator) and will be used to solve the complex membership determination problem. The results from experiments shows that the un-normalized graph p-Laplacian ranking methods are at least as good as the current state of the art network-based ranking method (p=2) but often lead to better ranking accuracy performance measures.

Molecular Genetics and Metabolism, 2001

Serum calcium is under tight physiological control, but it is also a quantitative trait with subs... more Serum calcium is under tight physiological control, but it is also a quantitative trait with substantial genetic regulation. Mutations of the CASR gene cause familial hypocalciuric hypercalcemia or autosomal dominant hypoparathyroidism, depending on whether they decrease or increase, respectively, ligand binding to the receptor protein. We described an association between ionized calcium and a common polymorphism (A986S) found in the cytoplasmic tail of this G protein-coupled receptor. We report here on an independent study of 387 healthy young women. Genotyping was performed by allele-specific amplification and serum chemistries were measured by automated clinical assay. Frequencies of SS, AS, and AA genotypes were 6, 107, and 274, respectively, yielding a 986S allele frequency of 15.4%. Mean total serum calcium (Ca T) was significantly higher in the SS (9.88 ؎ 0.29 mg/dL, P ‫؍‬ 0.015) and AS groups (9.45 ؎ 0.05 mg/dL, P ‫؍‬ 0.002), than in the AA group (9.23 ؎ 0.04 mg/dL). In multiple regression modeling, the A986S genotype remained an independently significant predictor of Ca T (P < 0.0001) when serum albumin, globulin, inorganic phosphate, and creatinine covariates were included. These data are the first to show significant association between a common polymorphism and concentrations of a serum electrolyte. The A986S polymorphism is also a potential predisposing factor in disorders of bone and mineral metabolism.