Understanding 3G Mobile Service Acceptance in Ho Chi Minh City, Vietnam

Abstract

The rapid development of telecommunication and Internet services enables smartphone users to access online services faster and create more demand for using high-speed data services. The third generation (3G) mobile services have become the pioneer for the trend of high speed data transmission for years. This study aims to explore the factors that affect behavioral intention of adopting 3G mobile telecommunications. After implementing a structural equation modeling to analyze the data collection of 223 self-administered correspondents, we found that perceived factors, including ease of use, usefulness and enjoyment have a significantly positive relationship with attitude and while the attitude is positively associated with behavioral intention to use 3G. Based on the results, the research enables us to propose several practical recommendations to 3G providers in Vietnam such as 3G providers should provide more interesting and entertaining contents in their 3G applications and services, which charge appropriate fees and are easy to use for customers. In addition, 3G providers should focus on customers' attitude by listening and receiving customers' feedbacks to improve 3G technological solutions and value-added services.

Temperature- and Pressure-Dependent Kinetics of CH2OO + CH3COCH3and CH2OO + CH3CHO: Direct Measurements and Theoretical Analysis

“…At room temperature, rate coefficients for CH 2 OO + carbonyl compounds were found to be two orders of magnitude higher than with alkenes. Considering that reactions of CH 2 OO with double bonds , are expected to proceed mainly via 1,3 dipolar cycloaddition , then the increase in the rate coefficients in going from alkenes to carbonyl compounds is likely due to the differences in the nature of the corresponding double bonds. The C=O bond is expected to be more reactive toward CH 2 OO on account of its higher dipolar character compared to the C=C bonds in alkenes.…”

Electrochemical Determination of Chromium(VI) in River Water with Gold Nanoparticles-Graphene Nanocomposites Modified Electrodes

“…Graphene/ AuNPs/GCE also offered excellent repeatability with a relative standard deviation (RSD) of about 1.70% for 5 repeated measurements of 5.00 μM Cr(VI). Compared with previously published methods with gold based electrodes, [10][11][12][13][14][15][16][17][18] the Graphene/ AuNPs/GCE offers the advantages of a satisfied detection limit, convenient detection procedures and simple electrode preparation, which fulfills the requirement for potential practical applications.…”

“…Gold nanoparticles (AuNPs) or nanostructured gold modified electrodes have been developed due to their favorable characteristics in the enhancement of electron-transfer processes with respect to the polycrystalline gold electrode. [10][11][12][13][14][15][16][17] The graphene-based nanomaterials is also being used for electrochemical sensing applications with greater frequency because of unique properties, such as high conductivity, excellent mechanical property and large active surface area. [18][19][20][21][22][23] A modified electrode with AuNPs and graphene nanocomposites for the detection of Cr(VI) was first reported by Santhosh and coworkers.…”

A new polyoxygenated cyclohexene and a new megastigmane glycoside from Uvaria grandiflora

“…9 In our previous studies focusing on the constituents of Uvaria plants and their cytotoxicity, we discovered the presence of the unique lignan glycoside, ufaside, in the aerial parts of Uvaria rufa (Dun.) Blume 10 (1), and a new megastigmane glycoside, grandionoside A (2), together with ten known compounds, pipoxide chlorohydrin (3), 13 (−)-zeylenone (4), 3 (−)-zeylenol (5), 14 (+)-pipoxide (6), 15 lupeol (7), 16 velutinam (8), 17 threo-octadecane- 1,9,10-triol (9), 18 (Z)-3-hexenyl-1-O-β-D-glucopyranoside (10), 19 sakurasosaponin (11), 20 and ardisiacrispin B (12) 21 (Fig. 1).…”