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DO, Trang Huyen,LE, Huyen Mong,LUONG, Diem Thuy Thi,TRAN, Quanh Thi Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.10
The study investigates the relationship between broad-scope management accounting information usage, market orientation, and the firm performance. This study employs a survey data of 149 top-level and mid-level managers working in Vietnamese tourism enterprises. To analyze research data, we employ SmartPLS 3 software. The analytical process include measurement model evaluation (evaluate the scale's validity and reliability) and structural model evaluation (test research hypotheses). The results reveal that broad-scope management accounting information usage has a positive direct effect on market orientation dimensions (include information generation, information dissemination, and responsiveness). Then, market orientation dimensions also have positive direct effects on the performance of Vietnamese tourism firms, excluding information dissemination. Moreover, this study also reveals that the market orientation dimensions mediate the relationship between broad-scope management accounting information usage and firm performance. The findings of this study suggest that tourism firms should pay more attention to the use of management accounting information in decision-making. With the increasingly fierce competition of the tourism firms today, capturing and meeting the needs of the market is a prerequisite to help firms enhance their competitiveness and improve their performance. To do that, Vietnamese tourism firms need to consider pursuing market orientation and enhancing broad-scope management accounting information usage.
LE, Hoang Ba Huyen,NGO, Chi Thanh,TRINH, Thi Thu Huyen,NGUYEN, Thi Thu Phuong Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.2
The article aims to identify the main factors affecting customers' decision to use mobile banking service in Vietnam, a case study in Thanh Hoa province. Based on theoretical frameworks of the Technology Acceptance Model (TAM) and the Unified Theory of Acceptance and Use of Technology (UTAUT), the study has been conducted with 370 questionnaires to consumers who have not yet used and are currently using mobile banking in Thanh Hoa province. The research results indicates that several factors have been evaluated to be more important than others, of which, the social influence is the strongest, the second is the compatibility and some others factors such as perceived ease of use, perceived trust, etc., all affecting the intention to use mobile banking in Thanh Hoa. Based on these important results, the article propose a number of recommendations: (i) Exploiting the advantages of social influence on the increase of intention to use; (ii) Increasing compatibility and minimizing costs for customers when they use Mobile Banking; (iii) Developing a strategy to increase the users' perceived ease of using banking services; (iv) Issuing a policy on increasing the security of Mobile Banking system to meet customers' needs; and (v) Developing an individual customer management system to improve service quality.
Efficient Parallel Block-layered Nonbinary Quasi-cyclic Low-density Parity-check Decoding on a GPU
Huyen Pham Thi,Hanho Lee 대한전자공학회 2017 IEIE Transactions on Smart Processing & Computing Vol.6 No.3
This paper proposes a modified min-max algorithm (MMMA) for nonbinary quasi-cyclic low-density parity-check (NB-QC-LDPC) codes and an efficient parallel block-layered decoder architecture corresponding to the algorithm on a graphics processing unit (GPU) platform. The algorithm removes multiplications over the Galois field (GF) in the merger step to reduce decoding latency without any performance loss. The decoding implementation on a GPU for NB-QC-LDPC codes achieves improvements in both flexibility and scalability. To perform the decoding on the GPU, data and memory structures suitable for parallel computing are designed. The implementation results for NB-QC-LDPC codes over GF(32) and GF(64) demonstrate that the parallel blocklayered decoding on a GPU accelerates the decoding process to provide a faster decoding runtime, and obtains a higher coding gain under a low 10-10 bit error rate and low 10-7 frame error rate, compared to existing methods.
Huyen N. T. D.,Schonewille J. Th.,Pellikaan W. F.,Trach N. X.,Hendriks W. H. 아세아·태평양축산학회 2024 Animal Bioscience Vol.37 No.3
Objective: This study determined fermentation characteristics of commonly used feedstuffs, especially tropical roughages, for dairy cattle in Southeast Asia. This information is considered relevant in the context of the observed low milk fat content and milk production in Southeast Asia countries.Methods: A total of 29 feedstuffs commonly used for dairy cattle in Vietnam and Thailand were chemically analysed and subjected to an <i>in vitro</i> gas production (GP) test. For 72 h, GP was continuously recorded with fully automated equipment and methane (CH<sub>4</sub>) was measured at 0, 3, 6, 9, 12, 24, 30, 36, 48, 60, and 72 h of incubation. A triphasic, nonlinear, regression procedure was applied to analyse GP profiles while a monophasic model was used to obtain kinetics related to CH<sub>4</sub> production.Results: King grass and VA06 showed a high asymptotic GP related to the soluble- and non-soluble fractions (i.e. A1 and A2, respectively) and had the highest acetate to propionate ratio in the incubation fluid. The proportion of CH<sub>4</sub> produced (% of GP at 72 h) was found to be not different (p>0.05) between the various grasses. Among the selected preserved roughages (n = 6) and whole crops (n = 4), sorghum was found to produce the greatest amount of gas in combination with a relatively low CH4 production.Conclusion: Grasses belonging to the genus <i>Pennisetum</i>, and whole crop sorghum can be considered as suitable ingredients to formulate dairy rations to enhance milk fat content in Vietnam/Thailand.
The Activation of Glycerol Dehydrogenase from Escherichia coli by ppGpp
Huyen Nga Hoang,Thanh Tuyen Tran,Che-Hun Jung 대한화학회 2020 Bulletin of the Korean Chemical Society Vol.41 No.2
Glycerol dehydrogenase (GldA) from Escherichia coli is a Zn2+-containing alcohol dehydrogenase which catalyzes the NAD+-dependent oxidation of glycerol to dihydroxyacetone. In this study, GldA has been cloned, over-expressed, and isolated by an affinity and an ion-exchange chromatography. GldA shows a strong intrinsic fluorescence at 320?nm, when excited at 280?nm. The fluorescence intensity decreases in the presence of NAD+, NADH, and dihydroxyacetone, the substrate and products for GldA, which allows us to determine the dissociation constants for those molecules as 110.6?±?5.0 ?M, 9,1?±?0.6 ?M, 33.3?±?2.3 mM, respectively. The dissociation constant for NAD+ was similar to the kinetic constant, KM. Guanosine-5?-diphosphate 3?-diphosphate (ppGpp), accumulated in E. coli when starved for amino acids, nutrients, and phosphate, serves as a global regulator in replication, transcription, and translation. In this study, the fluorescence intensity of GldA also decreases in the presence of ppGpp and the dissociation constant for ppGpp is calculated as 108.9?±?8.6 ?M. ppGpp increases GldA activity with the half maximal activation at 33.1?±?3.1 ?M. On the contrary, GTP and GDP inhibit GldA, with the inhibition constants of 16.1?±?1.1 mM and 10.6?±?0.3 mM, respectively. Tris(hydroxymethyl)aminomethane serves as a competitive inhibitor against glycerol. GTP and GDP also bind to GldA with the dissociation constants of 60.0?±?0.8 and 61.0?±?1.3 ?M, respectively. These results suggest that GTP and GDP bind to GldA as strongly as ppGpp but only ppGpp activates GldA. This study shows that ppGpp binds to GldA and activates its activity for the first time. It is also suggested that the strong intrinsic fluorescence of enzymes and their changes in the presence of various ligands can be utilized to measure the binding affinities for those ligands. The method described here is especially effective for bindings with the relatively lower affinities.
Reversible absorption of SO2 with alkyl-anilines: The effects of alkyl group on aniline and water
Huyen Thanh Vo,조신혜,이웅,제정호,김홍곤,이현주 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.69 No.-
SO2 absorption behaviours of N,N-dimethylaniline (DMA), N,N-diethylaniline (DEA), N,N-dibutylaniline (DBA), and N-methyldiphenylamine (MDPA) — were investigated in dry and wet conditions. DMA showed the highest SO2 absorption capacity of 1.5 molSO2 molAbsorbent−1 in dry condition, while DBA showed the highest capacity of 1.75 molSO2 molAbsorbent−1 in wet condition. Raman analyses revealed that anilines captured SO2 by forming charge transfer complexes in dry condition and the interaction between SO2 and aniline decreased as the steric hindrance of alkyl aniline increased. In contrast, bisulfite-based acid-base salt was formed in the presence of water, and the capacity increased with an increasing basicity of the alkyl aniline.
Factors Affecting Electronic Tax Compliance of Small and Medium Enterprises in Vietnam
Huyen Thi Dieu LE,Men Thi BUI,Giang Thi Cam NGUYEN 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.1
In Vietnam, tax compliance has become an important goal in the tax reform strategy. In the context of technology 4.0, the application of the electronic tax system is of great significance to small- and medium-sized enterprises (SMEs). The paper explores factors influencing electronic tax compliance of SMEs in Vietnam. Data from 402 SMEs, who are business taxpayers, was selected through a researcherdesigned questionnaire survey method. The results indicate that four groups of factors have significant effects on electronic tax compliance among Vietnamese SMEs. These groups include Taxpayer Awareness (TA), Perceived Ease of use (PTE), Vietnamese tax administration (VTA,) and Efficiency of Vietnamese tax policy (VTP). The factor analysis was adopted; Cronbach’s alpha coefficients were calculated, exploratory factor analysis (EFA) was used. The findings found that among these four groups, the most influencing factor is taxpayer awareness. It is suggested that the Vietnamese government should pay attention to promote and support SMEs to raise full awareness of tax obligations. This could be done through various methods such as conducting workshops for updating tax policies and short courses to business taxpayers of electronic tax compliance. The study is expected to provide some important implications for policy-makers and practitioners in tax policy reform in Vietnam.