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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 Dinh NGUYEN,Thanh Duc NGUYEN,Trung Duc NGUYEN,Ha Viet NGUYEN 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.8
Stepping into the technological boom time, Vietnam has integrated into the trends of using Fintech applications as a new means of payment. This article evaluates the relationship between perceived security (including service security and platform security), knowledge, confirmation, perceived usefulness, satisfaction, attitude and lastly enterprise’s images regarding the service and continuous intention to use Fintech services. The survey results of 352 Vietnamese customers using Fintech services, reliability test and extended post-acceptance model (EPAM) which is based on PAM and ECT models. From the survey, we further found out that perceived security (BSS) has no direct impact on continued intention to use, while perceived security (BSS) has positive impact on confirmation (CON), similarly, perceived usefulness (PU) and user’s satisfaction (SES). Knowledge of the Mobile Fintech payment service (KNOW) has a positive impact on perceived security (BSS). Confirmation (CON) has a positive influence on perceived usefulness but in the meanwhile it has created a negative impact on user’s satisfaction (SES). From the survey it can also tell that user’s attitude (ATT) and enterprise image (IMG) both have a positive impact on continual intention to use Fintech services. From the research results, we also propose some recommendation to enhance the continual intention to use Fintech services in Vietnam.
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.
Diselenide-decorated Liposomes for Intracellular Delivery of a Vitamin C Derivative in Cancer Cells
Dat Bui Van,박재형 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Vitamin C, has emerged as an alternative to conventional chemotherapy for treating cancers because of its oxidative stress promotion. However, vitamin C should be delivered to cells in its oxidized form, dehydroascorbate (DHA) due to its cytotoxicity. By incorporating diselenide-based amphiphilic lipids into the liposomal membrane, Glutathione (GSH)-responsive nanoparticles (G-NPs) have been prepared as potential carriers of DHA. DHA was wrapped into NPs using the dehydrationrehydration method to make DHA-loaded G-NPs which induced much higher GSH depletion in HT29 colon cancer cells than DHA-loaded controls. Particularly, DHA-contained G-NPs sharply increased the intracellular levels of reactive oxygen species, implying enhanced oxidative stress by stimuli-responsive DHA release. As a result, DHA-contained G-NPs exhibited significant cytotoxicity against HT29 cells. Overall, G-NPs might serve as emerged deliver for intracellular delivery of DHA during cancer treatment.
The Inhibition of Diacylglycerol Acyltransferase by Terpenoids from Youngia koidzumiana
Dat Nguyen Tien,Cai Xing Fu,Rho Mun-Chual,Lee Hyun Sun,Bae KiHwan,Kim Young Ho The Pharmaceutical Society of Korea 2005 Archives of Pharmacal Research Vol.28 No.2
The EtOAc extract of Youngia koidzumiana significantly inhibited the diacylglycerol acyltransferase (DGAT) from rat liver microsomes. Bioactivity-guided fractionation led to the isolation of nine compounds, the structures of which were established using physicochemical and spectral data. Of the isolated compounds, oleanolic acid (2), methyl ursolate (7) and corosolic aicd (8) inhibited DGAT, with $IC_{50}$ values of 31.7, 26.4, and $44.3{\mu}M$, respectively. However, sesquit-erpenoids showed only weak inhibitory effects toward DGAT.