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High-Throughput Multi-Threaded Non-binary LDPC Decoder Architecture
Thang Xuan Pham,Tuy Nguyen Tan,Phap Duong-Ngoc,Huyen Pham Thi,Hanho Lee 한국차세대컴퓨팅학회 2021 한국차세대컴퓨팅학회 학술대회 Vol.2021 No.11
This paper introduces an efficient non-binary low-density parity-check (NB-LDPC) decoder architecture, in terms of increasing decoding throughput. By taking advantages of non-binary quasi-cyclic LDPC codes, a new layered decoding algorithm and corresponding efficient hardware architecture are introduced. The proposed method can improve parallelism in decoding estimations of NB-LDPC decoder while remaining error-correcting performance. The implementations results confirmed that the proposed decoder with two threads can achieve a throughput of about 2.78 Gbps, which is around 1.63 times faster than that of the state-of-the-art decoder at almost the same hardware efficiency.
Effects of Corporate Governance and Earning Quality on Listed Vietnamese Firm Value
DANG, Hung Ngoc,PHAM, Cuong Duc,NGUYEN, Thang Xuan,NGUYEN, Hoa Thi Thanh Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.4
The paper examines the influence of corporate governance (CG) and earning quality (EQ) on corporate value (FV) of Vietnamese enterprises. The study uses GLS regression and linear structure model using data collected from companies listing on the stock market in Vietnam during 2008-2018, with a total of 2,937 observations. The research results indicate that EQ and CG represented by the Integrated Board of Directors and the Integrated Supervisory Board have a positive effect on FV directly and indirectly. The results show that the Integrated Board of Directors has a positive effect on EQ, whereas the Integrated Supervisory Board has a negative effect on EQ. Based on the research results, we suggest that companies need to strictly comply and implement GC, so to bring down the agency cost and consequently to increase performance. The companies also should establish the Board of Director of a proper size, with financial and accounting specialty, and including women board members. The government also needs to improve the management mechanism asking for firms to prepare and publish financial statements with reliable company information, which could be provided to users. These recommendations are a useful basis to help businesses improve FV via changes in the corporate governance factors in each enterprise.
A Novel Performance Verification Approach of MIPI Camera Serial Interface 2
Tuy Tan Nguyen,Thang Xuan Pham,Phap Duong-Ngoc,Hanho Lee 한국차세대컴퓨팅학회 2022 한국차세대컴퓨팅학회 학술대회 Vol.2022 No.10
The explosive growth of embedded vision enables the use of imaging products such as cameras and displays in IoT and multimedia applications. Mobile Industry Processor Interface (MIPI) Camera Serial Interface 2 (CSI-2) is the most commonly used interface to connect image sensors or displays to application processors or SoCs in such applications. To ensure that imaging modules such as cameras work correctly when integrated into a system, verification processes such as bus functional verification and bus performance verification are essential. This paper introduces a bus performance verification approach for MIPI CSI-2. By evaluating the performance of a two-camera system with different video parameter sets, the best possible performance of the system is obtained. Simulation results show that the bandwidth utilization of each camera is more than 99.5%.
La Nam Phat,Tran Quoc Thang,Huynh Cam Nguyen,Dang Thi My Duyen,Dao Xuan Tien,Bui Dang Dang Khoa,Pham Tan Khang,Nguyen Thi Huong Giang,Hoang Minh Nam,Mai Thanh Phong,Nguyen Huu Hieu 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.11
Recycling biomass to cellulose aerogel (Cell-A) provides a promising approach to develop adsorbent materials for spilled-oil recovery. In this work, Cell-A was fabricated from Vietnamese water hyacinth via crosslinking methods using PVA as a crosslinker and freeze-drying process. Various cellulose to PVA ratios were investigated to obtain the optimal synthesis condition. The Cell-A was additionally modified by dip-coating in poly(dimethylsiloxane) (PDMS) and pyrolyzing to form PDMS-coated cellulose aerogels (Cell-AP) and carbon aerogels (CA), respectively. Results of the oil adsorption tests show that pyrolysis produced aerogels with greater adsorption capacity with an optimal mass ratio of 15 : 1 cellulose to PVA. Furthermore, the pseudo-second-order model was found to be more accurate than the pseudo-first-order model for the study of oil absorption kinetics. As a result, the modified cellulose aerogel is promising for replacing earth-unfriendly polymer-based oil sorbents due to their high oil absorption capacity.
Tien-Dung Chu,Thi-Thuy-Phuong Doan,Duy-Truong Quach,Xuan-Tuyen Nguyen,Tuan-Son Nguyen,Duc-Thang Pham,Dong-Hyun Kim 한국자기학회 2020 Journal of Magnetics Vol.25 No.1
In this research, a simple method has been presented to synthesize the magnetic - semiconductor Fe₃O₄/TiO₂ heterostructure nanocomposites via three steps: firstly, synthesis of Fe₃O₄ nanoparticles by co-precipitation method; thereafter, formation of Fe₃O₄/TiO₂ composites by sol-gel method; finally, annealing to form Fe₃O₄/TiO₂ anatase (denoted as Fe₃O₄/TiO₂-A) and Fe₃O₄/TiO₂ rutile (denoted as Fe₃O₄/TiO₂-R) heterostructure nanocomposites, respectively. The results of X-ray diffraction, transmission electron microscopy, and energy-dispersive X-ray spectroscopy show that the Fe₃O₄/TiO₂-A and Fe₃O₄/TiO₂-R heterostructure nanocomposite samples contain both magnetite (Fe₃O₄) and semiconductor TiO₂ (anatase or rutile phase, respectively). The asprepared nanocomposite samples exhibit superparamagnetic properties at room temperature with high saturation magnetization (Ms) above 19.5 emu/g at the applied magnetic field of 11 kOe. Moreover, the Fe₃O₄/TiO₂-A and Fe₃O₄/TiO₂-R heterostructure nanocomposites with a low band gap energy of 2.89 eV and 2.81 eV, respectively, are promising to enhance the performance of photocatalytic activities in the visible light region for application in wastewater treatment.