Buckling and postbuckling of CNT-reinforced composite sandwich cylindrical panels subjected to axial compression in thermal environments

An analytical investigation on the buckling and postbuckling behavior of carbon nanotube reinforced composite (CNTRC) sandwich cylindrical panels exposed to thermal environments and subjected to uniform axial compression is presented in this paper. Beside sandwich model with CNTRC face sheets in the literature, the present work suggests a sandwich model with CNTRC core layer and homogeneous face sheets. Carbon nanotubes (CNTs) are reinforced into matrix phase through uniform or functionally graded distributions. Effective properties of nanocomposite layers are determined according to extended rule of mixture. Formulations are based on the first order shear deformation theory taking into account Von Karman-Donnell nonlinearity. Approximate solutions are assumed to satisfy simply supported boundary conditions and Galerkin method is used to derive the closed-form expression of nonlinear load-deflection relation from which buckling loads and postbuckling paths are determined. Numerical examples are carried out and interesting remarks are given

INVESTMENT TRENDS OF VIETNAMESE YOUNG PEOPLE

To examine the investment trends of Vietnamese young people, the research team surveyed the investment trends of young people living, studying, and working in Vietnam. Survey results show that the investment trends of young people today are diverse in investment types such as (1) Real estate investment, (2) Financial investment, (3) Gold investment; (4) Bank deposit… The research team also learned from survey participants about their priorities for investment channels and clarified the investment characteristics of young people. Through analyzing survey data, the research team had some discussions on investment trends of young people, raising young people's awareness of investment activities and choosing appropriate investment channels to optimize profitability for young investors and minimize risks

THE FACTORS IMPACT ON THE TRAVEL INTENTION OF HANOI'S PEOPLE AFTER COVID-19 PANDEMIC

The article studies the factors that affect the intention to travel after the Covid-19 pandemic of Hanoi citizens. The research team uses a model of factors that affects the travel intention of people in Hanoi city after the Covid-19 pandemic, including (1) Attitude, (2) Social influence, (3) Image of Destination, (4) Risk perception, (5) Trip expenses, (6) Propulsion. With 303 participants in the survey, the research results show that the factor "The influence of propulsion" had the largest average score (3.99), indicating that the motivation of desire to relax and explore are vital factors that affect the travel intention of Hanoi people after the Covid-19 epidemic. The factor "Effect of perception of risk" has the lowest score (3.56) but shows some concerns such as weather forecasting, trip expenses' estimation, transportation problems, inadequate information, epidemic prevention, and food safety issues, which will not hinder people's intention to travel. That partly shows that Vietnam's tourism industry has been invested, cared for, and is on the way to development in recent years. From the research results, within the framework of the article, the research team also proposed some measures to stimulate tourism demand after the Covid-19 pandemic

COSMETIC CONSUMPTION TRENDS OF VIETNAMESE YOUNG PEOPLE – A CASE STUDY OF HIGH SCHOOL AND UNIVERSITY STUDENTS IN HANOI

Our beauty demands are significantly increasing with the rapid development of the Global Economy. The use of cosmetic products has become prevalent among Vietnamese youth. In this article, the research team concentrates on collecting and analyzing data on cosmetics consumer trends of Vietnamese teenagers - research of high school and university students in Hanoi. The research yields some important results: Young people are becoming more interested in natural and time-saving trends toward beauty. The top concerns in using cosmetic products are skincare, haircare, and body odor. Make-up is also catching teenagers’ attention, but the number of young people frequently doing makeup is inconsiderable, mainly due to the lack of knowledge, interest, and time for this field. In addition, the use of cosmetic products is mostly influenced by personal preferences, opinions of friends/relatives, and cultural tastes. The purchase of cosmetic products is driven by prices, brand names, and ingredients. Adolescents also tend to use some healthy products, such as cosmeceutical or vegan ones, to overcome the problems of unclear origins or irritating ingredients. Besides, high school and university students have low financial capacities; therefore, their money spent on cosmetic products is not too high, and the number of cosmetic products owned is not too many. Finally, the improvement of technology has led to two trends among teenagers: the convenience of cosmetic-related information searching and the widespread presence of shopping through e-commerce platforms

VNINDEX INDEX: A VIEW FROM QUANTITATIVE ANALYSIS

The financial strategy towards 2030 in Decision no. 368/QD-TTg enacted on 21/3/2022 by the Vietnam Prime Minister had set developmental goals for the stock market to become a channel to promote mid-and-long term capital raising for the economy, to continue changing the structure to be more appropriate for the monetary, the capital, the stock, and the bonds market. In the past two years, the stock market in Vietnam has manifested impressive growth. A prime example is the active growth of private investors. However, many challenges and loopholes still exist in the stock market. The stock market is a special market as the fluctuation of the VN-index index is affected by many factors including the expectations of the investor. When the market shows trends of increases in points then investors expect the next session to grow as well, leading to a rise in sales even for stocks with inflating costs, thus the VNindex will increase and vice versa. The structure of the econometric is utilized to assess the impacts of the VN-index of the previous month on the index of the following month on the Vietnamese stock market in the period from January 2019 to May 2022. The conclusion of the quantitative analysis shows that if the VN-index of the previous month increases by 1% then the VNindex of the following month will increase by 0.965% or vice versa. From the results of the analysis, the research team has proposed a few discussion points intending to stabilize the stock market in the upcoming time and develop the market according to the financial strategy towards 2030 in Decision no. 368/QD-TTg by the Vietnam Prime Ministe

THE FACTORS AFFECT CONSUMERS’ INTENTION TO PURCHASE ECO-FRIENDLY BAGS IN HAIPHONG CITY

This research focuses on understanding the factors that influence consumers' intention to purchase environmentally friendly bags in Hai Phong City. There are 5 factors proposed to be included in the research model. However, with the collected data from 328 Hai Phong consumers tested using the SMARTPLS software, the testing results showed that 3 factors positively influence the intention to purchase environmentally friendly bags, which the factor with the greatest influence is "Expectations for a good life for future generations" (KVCS) (0.394), followed by the factor "Personal Image" (HACN) (0.219) and finally the factor "Attitude towards eco-friendly bags" (TD) (0.150). The results of testing the factors "Green Marketing Programs" (MX) and "Environmental Understanding" (HBMT) are not statistically significant enough to influence the intention to purchase environmentally friendly bags of consumers in Hai Phong City. With the above testing results, the research team exchanged and discussed ideas to convey messages and encourage consumers to use environmentally friendly bags

ECO - FRIENDLY HEALTHY DRINKS CONSUMPTION TENDENCY OF VIETNAMESE YOUTH

Along with the rapid development of the world economy, young people's demand for drinks with organic ingredients, rich in minerals and healthy vitamins (healthy drinks) also changes increasingly. In the article, the research team conducted a survey focused on researching and collecting data on consuming healthy and environmentally friendly drinks among Vietnamese youth. The research results show some following notable issues: Young people tend to use healthy drinks in the direction of being quick and convenient but still ensuring nutritional content. The aspects that young people are most interested in when using healthy drinks are benefits, nutritional value, and concern for the environment. Healthy drinks have been popular in recent years, but there are still some young people who have never heard of healthy drinks or have known but have never used the product. In addition, the use of healthy drinks is mainly influenced by the benefits and prices, and the product's environmental friendliness. Research shows that the monthly amount spent on healthy drinks is only about 100-200 thousand VND, because young people, especially students, do not have high financial conditions

ONLINE SHOPPING TRENDS OF VIETNAMESE YOUNG PEOPLE

With the drastic development of the Internet and social media, online shopping gradually gains traction after being introduced to the market in the 1990s. Since the outbreak of Covid-19 in 2020, this trend has become more popular on a global scale. There are numerous benefits including the wide range of products, sales, and saving consumers' time, which attract more and more people, especially the youth. As far as the increasing importance of online shopping is concerned, our research team has a deeper insight into it through articles and research on Vietnamese Generation Z, who were born from 1995 to 2012 to understand more about the demands, time usage, advantages, and disadvantages of online shopping. From the results of the research, we put forward some solutions that consumers could implement to purchase things online more effectively