Numerical and Experimental Study on the Grinding Performance of Ti-Based Super-Alloy

The experiments of the surface grinding of Ti-6Al-4V grade 5 alloy (Ti-64) with a resin-bonded cubic Boron Nitride (cBN) grinding wheel are performed in this research to estimate the influence of cutting parameters named workpiece infeed speed, Depth of Cut (DOC), cooling condition on the grinding force, force ratio, and specific energy. A finite element simulation model of single-grain grinding of Ti-64 is also implemented in order to predict the values of grinding forces and temperature. The experimental results show that an increase of workpiece infeed speed creates higher intensified cutting forces than the DOC. The grinding experiments under wet conditions present slightly lower tangential forces, force ratio, and specific energy than those in dry grinding. The simulation outcomes exhibit that the relative deviation of simulated and experimental forces is in the range of 1-15%. The increase in feed rate considerably reduces grinding temperature, while enhancement of DOC elevates the heat generation in the cutting zone

Fear of travelling after COVID-19: The moderation effect of social distancing

COVID-19 has caused unparalleled public dread, which will most certainly impede tourist business recovery once the epidemic is gone. This research investigates the causes of the general public's epidemic travel anxiety, as well as how individuals impose self-protection, coping, and resilience with travel. The study blends theories such as protection motive theory, coping theory, and resilience theory to achieve the research goal. The primary data came from an online poll of 322 Southeast Asian travelers. According to the findings, the magnitude and vulnerability of the danger might induce "travel dread," which leads to protection motivation and precautionary travel behaviors during the pandemic. The findings also demonstrate that social distancing has memory consequences. In other words, individuals who willingly engaged in social separation during the pandemic are more likely to continue doing so in the post-COVID period since their long-term behavior has been influenced.Tomas Bata University in Zlín, TBU; Finance Authority of Maine, FAM

FedDRL: Deep Reinforcement Learning-based Adaptive Aggregation for Non-IID Data in Federated Learning

The uneven distribution of local data across different edge devices (clients) results in slow model training and accuracy reduction in federated learning. Naive federated learning (FL) strategy and most alternative solutions attempted to achieve more fairness by weighted aggregating deep learning models across clients. This work introduces a novel non-IID type encountered in real-world datasets, namely cluster-skew, in which groups of clients have local data with similar distributions, causing the global model to converge to an over-fitted solution. To deal with non-IID data, particularly the cluster-skewed data, we propose FedDRL, a novel FL model that employs deep reinforcement learning to adaptively determine each client's impact factor (which will be used as the weights in the aggregation process). Extensive experiments on a suite of federated datasets confirm that the proposed FedDRL improves favorably against FedAvg and FedProx methods, e.g., up to 4.05% and 2.17% on average for the CIFAR-100 dataset, respectively.Comment: Accepted for presentation at the 51st International Conference on Parallel Processin

EFFECT OF SOME DISPERSING AUXILIARIES ON NANOSILICA DISPERSION INTO PASSIVE CHROME TRIVALENT SOLUTION

In this paper, the dispersion of nanosilica in conversion solution trivalent chromium using variety of dispersion aids namely: SDS, PVP, AE-7, OP-10 and epomin. The results showed that the nanosilica could disperse in conversion solution in low pH (pH = 1.5). The solution containing nanosilica was uniform, having no agglomeration with SDS, PVP and AE-7 after 7-day preparation. The results of zeta potential and size distribution illustrated that AE-7 was the most effective for nanosilica dispersion in passive solution trivalent chromium with medium size of nanosilica in C2-nanosilica solution using AE-7 equal ~ 60 nm. However, there was a much diffirence size between the size of nanosilica in passive solution and initial nanosilica. As a result, nanosilica could disperse in passive solution at low pH with AE-7 but this was not effective enough to held dispersed solution in stable state

OXIDIZED MAIZE STARCH: CHARACTERIZATION AND EFFECT OF IT ON THE BIODEGRADABLE FILMS I. CHARACTERIZATION OF MAIZE STARCH OXIDIZED BY SODIUM HYPOCHLORITE

The effects of hypochlorite level, i.e. 0.5; 1 and 2 active chlorine g/100g starch, on the structures and physicochemical properties of oxidized maize starch were investigated. The obtained results shown that oxidation degree grew up with increasing hypochlorite concentration, specially, the carboxyl content saw higher increased than the content of carbonyl. SEM images indicated that surface of oxidized maize starches were rougher than native starch. The surface of oxidized starches saw rougher with increasing hypochlorite level. However, the DSC results illustrated that there was no significant difference of gelatinization temperature between the native starch and oxidized starches

Luxury ecotourism: The benefits of using social media platforms

Tourism is one of the biggest industries that has ever growth in the past few decades. Within the industry, ecotourism stands out to be a new norm of tourism, where tourists visit the wildlife, and nature habitat without damaging the environment and being within the area. Therefore, ecotourism become popular and well-known within the industry and with tourists around the world. However, the concept of luxury ecotourism is still new to many people. The idea of luxury ecotourism is to give the consumer the satisfaction of visiting wildlife, communities, and space, where remaining the luxury of the trip. The approach is applying ethical to luxury tourism, making the customer feel comfortable about not damaging the area they visit. The idea is fascinating but the popularity of this still needs work. That is where the benefit of technology comes in. The paper is focusing on the factor that can help spread luxury ecotourism to more customers, and in this case, is social media. Social media uphold the wide range and spreading speed that no other platform has, which might be beneficial to promote any kind of product or service. The paper is using secondary data from past research and paper, to form an idea of how social media can benefit the growth of luxury ecotourism.Tomas Bata University in Zlín, TBU; Finance Authority of Maine, FAME; Univerzita Tomáše Bati ve Zlíně, UT

The influence of TikTok on young generation in Vietnam

The Internet and its growth throughout these near decades have been unbelievable. Especially social media platforms such as Twitter, Facebook, Snapchat, or in this case, TikTok has out-grown some of the mainstream media like television, radio, or newspaper. TikTok is a multinational social media platform that mainly focuses on short clips and videos, which is open for anyone to post on the platform, somewhat like YouTube. TikTok videos vary from entertainment, sport, informational, fashion or even cooking videos. The platform allows their videos to spread to all continents, leading to the spreading quickly of any “viral” video. At first sign, the platform seems to be an entertainment platform with no age restriction, due to the claim of the content restriction policy of TikTok. However, there are some downsides to this social media platform that people are slowly coming to realize, and these downsides are affecting the younger generation who use this platform almost every day. This research examines both positive and negative aspects of this social platform and the effects which it has on the younger generation in Vietnam. The research uses both qualitative and quantitative methods, which contain a list of questionnaires and open-ended questions. The purpose of the research is to make clear the influence of TikTok on the youth of Vietnam, which helps to form an opinion on whether the application is suitable for this generation. © the authors, 2023. All Rights Reserved.Univerzita Tomáše Bati ve Zlín

Factors influencing eWOM review adoption: An empirical evidence from Vietnam tourism website

Based on the cognition-affection-behaviour model, this study investigates the effects of tie strength, homophily, source trustworthiness, and source expertise on e-WOM credibility (EWC), which in turn affects the attitude toward the product (ATP), the attitude toward the website (ATW), and the adoption of eWOM review (ERA). The study sample includes 527 travellers who purchased a full trip via the Viet travel website. This study used Structural Equation Modelling (SEM) to assess the suggested model, demonstrating a good fit. The findings show that tie strength, homophily, source trustworthiness, and source knowledge all have a substantial and favourable influence on EWC. Furthermore, homophily has a considerable and favourable influence on the source's strength and trustworthiness. The findings also show that EWC has a substantial and favourable influence on ATP, ATW, and ERA. This research adds to the literature by including several viewpoints and aspects from informational and interpersonal drivers. Furthermore, this research argues that these variables influence ERA via EWC and dual mind-sets (ATP and ATW). © the authors, 2023. All Rights Reserved

Combined effect of anisotropy and uncertainty on the safe mud pressure window of horizontal wellbore drilled in anisotropic saturated rock

International audienc