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Dat Ngoc NGUYEN,Dat Dinh NGUYEN,Duy Van NGUYEN 한국유통과학회 2020 유통과학연구 Vol.18 No.6
Purpose: Research on the behavior of using digital banking services plays an important role for banks in the context of increasingly competitive banks, not only for domestic banks but also for foreign banks. Along with the development of science and technology brings new approaches to banking industry, digital banking increases the effectiveness of banking activities. Besides, information safety brings different feeling about digital banking system. Therefore, this research evaluates the relationship between Information safety and Intention to use banking services in Vietnam. Research design, data and methodology: With 329 Vietnamese customers using digital banking, reliability test, and structural equation model (SEM) analysis method. Results: the research shows that information safety has directly effects on perceived ease of use (PU), perceived risk (RIS) of customers to digital banking services. Perceived trust (TRU) has a negative impact on RIS. Perceived of usefulness (PEU) has a positive impact on attitude towards service (ATT), and RIS has a negative impact on ATT. RIS, PEU, ATT, convenience and enterprise image have positive effects on intention to use digital banking service. Conclusions: From the research results, the authors also propose some recommendations to enhance the intention to use digital banking services in Vietnam.
Dat, L.D.,Thao, N.P.,Luyen, B.T.T.,Tai, B.H.,Jeong, M.H.,Woo, M.H.,Kim, Y.H. Pergamon Press 2016 Bioorganic & medicinal chemistry letters Vol.26 No.3
Chemical investigation of Acanthopanax koreanum leaves resulted in the isolation of 13 compounds (1-13), including six new (20,29)-dehydrolupane-type triterpenoids: 3α,11α,30-trihydroxylup-20(29)-en-23,28-dioic acid (1), 3α,11α,30-trihydroxylup-20(29)-en-28-oic acid (2), 3α,11α,30-trihydroxylup-23-al-20(29)-en-28-oic acid (3), 3α, 11α-dihydroxy-20-oxo-30-norlupane-23,28-dioic acid (5), (20S)-3α-hydroxy-30 oxolupane-23,28-dioic acid (8), (20S)-3β,7β,29-trihydroxy-lupane-23-al-28-oic acid (10), and one novel compound isolated for the first time, named 3α,20α,29-trihydroxylupane-23,28-dioic acid (9), together with six known compounds (4, 6, 7, and 11-13). Chemical structures of the isolated compounds were evaluated by analyzing and comparing spectroscopic data with those reported in the literature. These compounds were also evaluated for their tyrosinase inhibitory effects. Among them, compounds 3, 7, 9, and 12 showed significant inhibitory effects, with inhibitory concentrations of 50% (IC<SUB>50</SUB>) values ranging from 8.61 to 63.5μM.
Treatment of Hepatic Fibrosis by Using Human Mesenchymal Stem Cell-derived Exosomes
Dat Bui Van,Yuce Li,박재형 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
Mesenchymal stem cell (MSC) therapy has emerged as a potential treatment for chronic diseases due to its regenerative ability. However, it has significant limitations such as cell’s movement, changing into inappropriate cell types, or growth of tumors. In order to overcome these risks, a revolutionary cell-free therapy was developed to treat the chronic disease, particularly hepatic fibrosis, by using human adipose stem cell-derived exosomes (hADSC-exos). The hADSC-exos were isolated from conditioned media of ADSCs using tangential flow filtration (TFF) method, then were suspended in PBS and stored at –80 °C. After intravenous injected into the liver-fibrotic mice, hADSC-exos preferred to maintain inside the livers, especially in damaged liver tissue, notably suppressed fibro genic markers and finally restored hepatic functions. In conclusion, exosomes derived from hADSC have a dramatic potential to treat chronic hepatic fibrosis.
A Workflow-based Mobility Model of Workers in Shipyards
Dat Van Anh Duong,Seokhoon Yoon(윤석훈) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.6
In shipyards, the movements of workers greatly affect the performance of wireless networks and IoT services. To fully validate such services and networks, worker's movements should be considered. A lot of human movement models have been studied but most of them focus on the daily movements of people. That cannot reflect the worker's movements in shipyards. Therefore, we propose a new mobility model called the workflow-based mobility model of workers in shipyards (WMS). To fully reflect the worker's movements, we consider workflow of workers for movement generation. First, workers are classified into types. Workers in a type have similar movement characteristics (e.g., pause time and movement speed). Then, a type is divided into teams. Workers of a team have the same workflow and workplace. Workers move based on their workflow.
Smart Dynamic Pricing in Cognitive Radio Systems
Dat Vo 한국산업정보학회 2012 한국산업정보학회논문지 Vol.17 No.2
Smart Dynamic Pricing has been introduced to address the under-utilised network resources problem in mobile telecommunications systems. In this paper, we investigate the applicability of Smart Dynamic Pricing and its signalling models into Cognitive Radio Systems. Cognitive Radio System is defined as one in which cognitive radios are employed to access shared spectrum and/or dynamically allocated spectrum. Network elements, protocols, traffic and control channels, and system architecture are proposed for the implementation of Smart Dynamic Pricing in Cognitive Radio System. It is found that Smart Dynamic Pricing and its signalling models can be applied to Cognitive Radio Systems.