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DOAN, Quyen Thuc,HO, Thu Thi Hoai,DOAN, Quynh Huong Korea Distribution Science Association 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.8
This study aims to examine the influence of capital structure on the business efficiency of joint stock commercial banks listed on the Vietnamese stock market. The article uses data collected from the financial statements of 15 prominent joint-stock commercial banks out of 27 joint-stock commercial banks listed in Vietnam from 2011 to 2021. The research uses E-view software in quantitative analysis to build regression models to determine the relationship and the impact of capital structure factors on the business efficiency of listed joint stock commercial banks. Research results show that ROA is affected by 2 variables of capital structure. It is the sum of customer deposits to total assets and total liabilities to total equity. Total debt to total equity and total customer deposits to total assets both have a negative effect on ROA. For the regression results of ROA with all control variables, the control variables have a positive relationship with the dependent variable. The article has provided recommendations based on the research findings to determine the proper capital structure. Managers must solve the outstanding amount of mobilized capital in previous years, combined with the bad debt handling activities that have arisen.
Liquefaction assessment using alternative approaches: a case study of Ho Chi Minh City stratigraphy
Nhat-Phi Doan,Duy Triet Doan,Van Nam Nguyen,박성식 한국지질과학협의회 2024 Geosciences Journal Vol.28 No.3
Liquefaction has been known as a phenomenon in which the shear strength and stiffness of saturated soil are reduced by the generation of pore water pressure under earthquake loading. Consequently, liquefaction-induced settlement can result in severe damage including building cracks or slope failure, which pose a threat to human lives and properties. In the current Vietnamese standard TCVN 9386:2012, liquefaction potential hazard is often evaluated using the simplified method, which solely identifies the areas with a high risk of liquefaction. Prediction of Safety Factor (FS), Settlement (S), Liquefaction Potential Index (LPI), and Liquefaction Severity Number (LSN) has not received sufficient attention to a completeness standard. This study assesses the liquefaction of the site at Ho Chi Minh City, Vietnam by using four conventional methods: the simplified procedure, linear equivalent analysis, loosely-coupled effective stress analysis, and fully-coupled effective stress analysis based on standard penetration test (SPT) data in Ho Chi Minh Metropolitan City. A class of seismic events that are compatible with the design response spectrum in the Vietnamese standard TCVN 9386:2012 is used as input ground motion at the bedrock. According to the results of different methods, maps of ground settlement, LPI, and LSN are proposed as useful references for construction works on such soils, which may have a high potential for liquefaction and subsidence.
Hole-Filling Algorithm with Spatio-Temporal Background Information for View Synthesis
DOAN, Huu-Noi,NGUYEN, Tien-Dat,HONG, Min-Cheol 'Institute of Electronics, Information and Communi 2017 IEICE transactions on information and systems Vol.100e.d No.9
<P>This paper presents a new hole-filling method that uses extrapolated spatio-temporal background information to obtain a synthesized free-view. A new background codebook for extracting reliable temporal background information is introduced. In addition, the paper addresses estimating spatial local background to distinguish background and foreground regions so that spatial background information can be extrapolated. Background holes are filled by combining spatial and temporal background information. Finally, exemplar-based inpainting is applied to fill in the remaining holes using a new priority function. The experimental results demonstrated that satisfactory synthesized views can be obtained using the proposed algorithm.</P>
A hardware-oriented concurrent TZ search algorithm for High-Efficiency Video Coding
Doan, Nghia,Kim, Tae Sung,Rhee, Chae Eun,Lee, Hyuk-Jae Springer (Biomed Central Ltd.) 2017 EURASIP journal on advances in signal processing Vol.2017 No.1
<P>High-Efficiency Video Coding (HEVC) is the latest video coding standard, in which the compression performance is double that of its predecessor, the H.264/AVC standard, while the video quality remains unchanged. In HEVC, the test zone (TZ) search algorithm is widely used for integer motion estimation because it effectively searches the good-quality motion vector with a relatively small amount of computation. However, the complex computation structure of the TZ search algorithm makes it difficult to implement it in the hardware. This paper proposes a new integer motion estimation algorithm which is designed for hardware execution by modifying the conventional TZ search to allow parallel motion estimations of all prediction unit (PU) partitions. The algorithm consists of the three phases of zonal, raster, and refinement searches. At the beginning of each phase, the algorithm obtains the search points required by the original TZ search for all PU partitions in a coding unit (CU). Then, all redundant search points are removed prior to the estimation of the motion costs, and the best search points are then selected for all PUs. Compared to the conventional TZ search algorithm, experimental results show that the proposed algorithm significantly decreases the Bjontegaard Delta bitrate (BD-BR) by 0.84%, and it also reduces the computational complexity by 54.54%.</P>
Doan Tham Thi Mong,Tran Gia Han,Nguyen Toan Khac,Lim Jin Hee,Lee Sanghyun 한국응용생명화학회 2024 Applied Biological Chemistry (Appl Biol Chem) Vol.67 No.-
Chrysanthemum morifolium is classified within the Asteraceae botanical family and serves as a phytomedicine in many countries. The objective of this study was to quantitatively analyze twelve phenolic compounds through HPLC/ UV and to assess the antioxidant abilities using the DPPH and ABTS+ assays in the leaves and flowers of six cultivars of C. morifolium: ‘Geumsu’, ‘Ilonka’, ‘Silvia’, ‘Pompadour’, ‘Yes Holic’, and ‘Ford’. The results indicated that the leaves of ‘Geumsu’ and ‘Ford’, as well as the ‘Pompadour’ flowers contained high levels of phenolic compounds and exhibited strong antioxidant abilities. Additionally, a relationship between the phenolic compounds and antioxidant activities was observed. These findings provide foundational knowledge about C. morifolium cultivars, which are promising natural sources that can offer health benefits.
Content-Aware Proactive Caching for Backhaul Offloading in Cellular Network
Doan, Khai Nguyen,Van Nguyen, Thang,Quek, Tony Q. S.,Shin, Hyundong IEEE 2018 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS Vol.17 No.5
<P>Proactive caching is considered a cost-effective method to address the backhaul bottleneck problem in cellular network. In this paper, we propose a novel popularity predicting–caching procedure that takes raw video data as an input to determine an optimal cache placement policy, which deals with both published and unpublished videos. To anticipate the popularity of unpublished videos of which the statistical information is not available, we apply the content-based approach by extracting and condensing video features into a high-dimensional vector. Subsequently, we form <TEX>$G$</TEX> clusters of features representing the potential video categories (VCs) and map the feature vector into a <TEX>$G$</TEX>-dimensional space, where each element indicates the percentage to which the video contains the features of the corresponding VC. Finally, we train a prediction model to foresee the popularity, where the set of published videos is used as training data. Last, the prediction with expert advice method is used to update the training set, and to gain insight into how the predictor output will deviate from the best expert prediction, we address the concept of expected cumulative loss and derive the analytical expression for its upper bound. Extensive simulation results are shown to gain insight into our proposed system subject to different factors, such as network size, cache capacity, and user’s preference profile. In summary, we show that applying intelligence-based content-aware proactive caching is an efficient approach to significantly improving the operation of cellular networks in the future.</P>