The Information Distribution Role of Facebook in Universities

Thi Nguyet Dung NGUYEN,Thi Thu Huong NGUYEN,Thi Phuong Anh NGUYEN,Thi Thu Huong NGUYEN,Thi Phuong Thao VU 한국유통과학회 2022 유통과학연구 Vol.20 No.5

Purpose: The paper employs the theory of planned behaviour, social identity theory, social presence theory, and social exchange theory to propose a model for using the social media platform Facebook in distributing information in universities. Research design, data and methodology: Data were obtained from 618 students at Hanoi University of Industry (HaUI) in Vietnam. The study used structural equation modeling in SPSS and the statistical analysis software AMOS version 24 to explore the information distribution role of Facebook. Results: Findings reveal that subjective norms and social presence play a key role in driving students to use Facebook for studying. In addition, university administrators can boost student satisfaction and academic achievement through Facebook. Interestingly, students who strongly identify with the brand name of the university have a strong connection with the university are more likely to engage in behaviors supportive toward the university. Conclusions: These findings show that Facebook had played a key information distribution role in universities. Thus, the study provides the executive board of the university and teachers can gain new understanding of why students employ Facebook for studying as well as capitalize on the platform to improve several operational metrics such as brand identification, student satisfaction, and academic achievement.

Rural Communication in the Covid-19 Pandemic: an Empirical Analysis from Thua Thien Hue Province, Central Vietnam

Nguyen, Hien Thi Dieu,Nguyen, Chung Van,Pham, Chung,Nguyen, Phong Thanh,Le, Cuong Chi Hung,Pham, Nhung Thi,Tran, Nguyet Thi Anh World Association for Triple Helix and Future Stra 2022 Journal of Contemporary Eastern Asia Vol.21 No.1

The world has witnessed the outbreak of the Covid-19 epidemic. Mainstream and social media are playing an important role in Covid-19 pandemic prevention. This research explores awareness, communication channels and effectiveness of communication in the Covid-19 pandemic in rural areas of Thua Thien Hue province, Central Vietnam. Primary information was collected from 181 respondents, who are farmers, non-farmers and students. Secondary information was collected from reports and statistical data. Television, word of mouth and local loudspeakers are the main channels of mainstream media while social media mentions the role of Facebook and Zalo to transfer Covid-19 pandemic information. Mainstream media is still the main channel of farmers and old people while non-farmers and young people tend to access information through social media. Communication has significantly contributed to improving awareness and action of rural people in the Covid-19 epidemic prevention.

Visible light-driven photocatalytic degradation of doxycycline using ZnO/g-C₃N₄/biochar composite in aqueous solution

Nguyen Van Hung,Bui Thi Minh Nguyet,Nguyen Huu Nghi,Nguyen Minh Luon,Nguyen Ngoc Bich,Le Van Thanh Son,Nguyen Trung Kien,Dao Ngoc Nhiem,Nguyen Thanh Tuoi,Dinh Quang Khieu 대한환경공학회 2024 Environmental Engineering Research Vol.29 No.4

In the present work, ZnO/g-C₃N₄/biochar was prepared, and it was used for visible-light driven photocatalytic degradation of some colorants (methylene blue, rhodamine B, methyl orange) and some antibiotics (doxycycline, ciprofloxacin, amoxicilline). Biochar was prepared by pyrolysing Phragmites australis biomass. The ZnO/g-C₃N₄/biochar composite was synthesized with the alkaline hydrolysis method. The obtained materials were characterized by X-ray diffraction, scanning electron microscopy, transition electron microscopy, energy dispersive X-ray/elemental mapping, ultraviolet-visible-diffuse reflectance spectroscopy, photoluminescence spectroscopy, nitrogen adsorption/desorption isotherms and X-ray photoelectron spectroscopy. The results show that ZnO nanoparticles with a large surface area are highly dispersed on the g-C₃N₄ particle surface and biochar. The composite exhibits superior photocatalytic degradation ability toward doxycycline, a broad-spectrum antibiotic of the tetracycline compared with individual components (ZnO or g-C₃N₄) and satisfies stability after six treatment cycles. The kinetics and degradation mechanisms of doxycyline were also addressed. In addition, the present catalyst also exhibits the photocatalytic degradation of methylene blue, rhodamine B, methyl orange, ciprofloxacin and amoxicillin in visible-light regions.

The Chinese Diaspora in Southeast Asian Colonial Primate Cities: Their Role and Relationships with the Ruler of Manila (Philippines) during 1571–1640s

NGUYEN, Thi Minh Nguyet 부경대학교 글로벌지역학연구소 2022 Journal of Global and Area Studies(JGA) Vol.6 No.3

Urbanization in Southeast Asia has seen a tremedous growth since the early-modern period. In this context, the Chinese, who had a long history with Southeast Asian ancient trading ports demonstrated their role and capacity to adapt to these new model cities followed the Western urban planning. Based on the geographical and historical conditions, Southeast Asian colonial cities were quickly associated with the phenomenon of a strong Chinese diaspora [hua-kew]. In the case of the Philippine islands, thousands of Chinese started to reside there since the beginning of the colonial period, especially when the Spanish bring their own silver from Latin America to Asia. However, their relationship with the government always was complicated due to their significant position in commercial activities and interactions with the indigenous community. In contrast to the indigenous people, the Chinese gradually migrated from concentrated settelements into the colonial metropolitan area and assumed a significant economic role in term of domestic and international trade of the whole islands. During this time, they built for themselves strategic and basic “position" inside the one and only colony of Spanish in Asia. This study argues that there was a change in colonial policy that targeted the Chinese immigrants and their responses to the fluctuations in the city’s economic growth. Furthermore, this paper analyzes the successes and failures of the colonial administration’s attempts to maintain their power of the government in the central cities under the influence of Chinese communities living inside and outside the city of Manila by focusing on Southeast Asia colonial urban history through a soccio-economic dimension. As a significant characteristic of of Southeast Asian cities througout history and into the present, this “strange relationship” has helped shape a new model for urban space.

Facile one-step synthesis of Ir-Pd bimetallic alloy networks as efficient bifunctional catalysts for oxygen reduction and oxygen evolution reactions

Nguyen, Anh Thi Nguyet,Shim, Jun Ho Elsevier 2018 Journal of Electroanalytical Chemistry Vol.827 No.-

<P><B>Abstract</B></P> <P>This paper introduces a facile one-step process to synthesize highly interconnected nanoporous Ir-Pd alloys supported on carbon that exhibit excellent bifunctional electrocatalytic activities for both the oxygen reduction and oxygen evolution reactions with reasonable stability in alkaline electrolytes. Nanoporous Pd networks with crystalline {111} faces were shown experimentally to serve mainly as active sites for the oxygen reduction reaction, whereas the Ir nanoparticles incorporated in the Pd nanoframe networks, where the optimized Ir:Pd ratio was 0.23:0.77 (<I>n</I> = 10), were responsible for the oxygen evolution reaction. Such three-dimensional architectures provide a high density of active sites for the oxygen electrochemical reaction and facilitate electron transport. More importantly, the nanoporous Ir-Pd alloy nanocomposites exhibited similar stability for the oxygen reduction reaction but superior catalytic activity to the commercial Pd catalyst in alkaline solutions. In addition, the materials were also highly active for the oxygen evolution reaction, e.g., a small overpotential at 10 mA cm<SUP>−2</SUP> (1.628 V vs. reversible hydrogen electrode), making it a high-performance bifunctional catalyst for both the oxygen electrochemical reaction. Rotating ring-disk electrode measurements showed that the oxygen reduction and oxygen evolution reactions on the Ir-Pd catalysts proceeded predominantly through the desired 4-electron pathway.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Facile one-step synthesis of a nanoporous Ir-Pd bimetallic alloy network. </LI> <LI> The composites exhibited bifunctional ORR/OER performance compared to Pd/C and Ir/C. </LI> <LI> Ir<SUB>23</SUB>Pd<SUB>77</SUB>/C exhibited the highest activity with good durability and overpotential. </LI> <LI> The properties of Ir<SUB>23</SUB>Pd<SUB>77</SUB>/C were due to its high surface area and high porosity. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>A highly active bifunctional electrocatalyst for the oxygen reduction and evolution reactions was developed based on a highly interconnected nanoporous Ir-Pd bimetallic alloy network.</P> <P>[DISPLAY OMISSION]</P>

Factors Affecting the Liquidity of Firms After Mergers and Acquisitions: A Case Study of Commercial Banks in Vietnam

Thi Nguyet Dung NGUYEN,Thanh Cong HA,Manh Cuong NGUYEN 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.5

The purpose of the research is to assess the factors affecting the liquidity of the commercial banks that are conducting mergers and acquisitions activities in Vietnam during the 2008–2018 period. This study employs samples based on 2-component data sets with crosssection and time-series data collected from the annual report of the State Bank and the audited acquisitions financial statements of nine commercial banks engaged in mergers and acquisitions activities. To carry out the research objectives, the authors conducted quantitative analysis through the Pooled OLS, REM, FEM and GMM models. The results shown that: (i) bank liquidity is positively affected by liquidity lagged, the return on equity (ROE) and economic growth; negatively affected by bank size, non-performing loan, short-run loan to deposit ratio; (ii) there is not enough evidence to conclude about the relationship between net profit margin, equity-to-assets ratio and inflation rate to bank liquidity; (iii) notably, we found evidence that, after the mergers and acquisitions, the liquidity of Vietnamese commercial banks decreased. The findings of this study suggest that bank managers take a more comprehensive view of the results of mergers and acquisitions and implications for banks to improve liquidity in the post-merger and acquisitions conditions.

Facile synthesis of MoS2 nanosheets-carbon nanofibers composite as catalysts for hydrogen evolution reaction

Nguyen Thi Minh Nguyet,Le Van Thang,Nguyen Huu HuyPhuc,Vinh-Dat Vuong,Tran Van Khai,Mai Thanh Phong 한양대학교 세라믹연구소 2019 Journal of Ceramic Processing Research Vol.20 No.2

MoS2 nanosheets (NS) were directly grown on carbon nanofiber (CF) and employed as electrocatalyst for hydrogen evolutionreaction (HER). The structural, surface morphology and chemical composition of the nanocomposites were characterized byfield emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), energydispersiveX-ray spectroscopy (EDS), X-ray diffraction (XRD), and Raman spectroscopy. XRD and TEM-EDS measurementsshowed that the molybdenum oxide precursor was successfully transferred into MoS2 nanosheets. It was confirmed from FESEMand TEM images that NS was uniformly distribution on surface of the CF. The HR-TEM images disclosed that the NSwas formed perpendicular to surface of CF fibers via the MoS2 layers growth parallel to CF surface which act as interface. The HER current density was about 12 mA cm−2 at catalyst loading of only 60 μg cm−2 at -0.384 V (vs. RHE).

Economic Integration in ASEAN+3: A Network Analysis

( Thi Nguyet Anh Nguyen ),( Thi Hong Hanh Pham ),( Thomas Vallee ) 세종대학교 경제통합연구소 2016 Journal of Economic Integration Vol.31 No.2

This paper analytically and graphically explores the characteristics of ASEAN+3’s trade and Foreign Direct Investment integration over the 1990~2012 period by applying the tools of network analysis. Our results find evidence that the degree of trade and Foreign Direct Investment integration varies among ASEAN+3 member countries over the observation period. Second, ASEAN+3’s intra-regional trade network seems to be more densely connected than its intra-regional Foreign Direct Investment network. Third, we reveal that large and/or advanced countries seem to be better linked and form a subregional bloc of tightly connected economies only in terms of export absolute value. Therefore, ASEAN+3 has been experiencing a widening gap in the trend and patterns of intra-regional trade and Foreign Direct Investment among its member countries at different levels of economic development.

Anti-allergic effects of the ethanol extract of <i>Syzygium formosum</i> (Wall.) Masam leaves and its immunoregulatory mechanisms

Nguyen, Thi Minh Nguyet,Lomunova, Maria,Vu, Thi Phuong Duyen,Le, Ba Vinh,Kim, Young Ho,Kang, Jong Seong,Hwang, Inkyu Elsevier 2018 Journal of Ethnopharmacology Vol.211 No.-

<P><B>Abstract</B></P> <P><B>Ethnopharmacological relevance</B></P> <P>As documented in a Vietnamese traditional medical encyclopedia, <I>Syzygium formosum</I> (Wall.) Masam leaves have been routinely used among indigenous Vietnamese people for treatment of various allergy-like symptoms including dermatitis and rhinitis.</P> <P><B>Aim of the study</B></P> <P>Anti-allergic activity of <I>S. formosum</I> leaves was examined with a mouse model of chicken ovalbumin (cOVA)-induced food allergy, and mechanisms underlying the anti-allergic effect were explored.</P> <P><B>Material and methods</B></P> <P>BALB/c mice were administered i.p. cOVA (20μg) plus alum (2mg) twice on day 0 and 14 for sensitization (immunization). Two weeks after the second immunization, the mice were administered cOVA (50mg) p.o. 5 times every 3 days to induce food allergy symptoms (i.e., anaphylaxis, diarrhea, and drop in the body temperature). Ethanol extract of dried leaves of <I>S. formosum</I> (80mg/kg or 200mg/kg body weight) was administered p.o. daily during the induction (challenge) period.</P> <P><B>Results</B></P> <P>Treatment with the <I>S. formosum</I> leaves ethanol extract ameliorated the allergic symptoms to a significant extent and in a dose-dependent manner. The treatment also resulted in a significant improvement in the inflammatory lesion in the small intestine and reduction in the numbers of mast cells and eosinophils recruited to the lesion. The treatment also brought about a significant reduction in the levels of Th2 cytokines produced by the mesenteric lymph node cells cultured ex vivo with cOVA. The passive anaphylaxis experiment also showed that the extract treatment impaired the mast cell function.</P> <P><B>Conclusion</B></P> <P>Our study provides a scientific basis for the traditional (indigenous) use of the <I>S. formosum</I> leaves extract for the treatment of various allergy symptoms in Vietnam. In addition, the results show that the extract has activities to suppress antigen-specific Th2 T cell immune responses and the mast cell function, which are directly related with its anti-allergic effect.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

RESEARCH ON FACTORS AFFECTING COMPETITIVENESS OF SMALL AND MEDIUM FOOD ENTERPRISES IN HANOI

Nguyen Thi My Nguyet,Luu Thi Thuy Duong,Pham đac Thang 한국무역학회 2017 한국무역학회 국제학술대회 Vol.2017 No.11

Competency theory confirms that competitiveness derives from capacity of resources maintenance and coordination and capacity allowing enterprises to gain their target and purpose. In this paper, in food enterprises, competitiveness is the exploitation and use of enterprise’s capacities to maintain and create competitive advantage to gain higher business performance than competitors and adapt to changes of business environment. This research shows 09 factors that affect to competitiveness of small and medium food enterprises. The research’s result and processed data shows that competitiveness of small and medium food enterprises in Hanoi is most affected by 03 factors: capacities of product quality management, marketing, production and technology. Other factors having less effect on competitiveness of enterprise include: capacities of human resource and finance. These results are the basis for suggesting some solutions to enhance competitiveness of these enterprises in Hanoi.