October 2020

This work concerns an experimental study of beef drying with a mixed tunnel solar dryer with forced convection. Drying experiments were carried out at the Centre for Study and Research on Renewable Energies (CERER). The evolution of air and product temperatures as a function of irradiance and the position of the racks was studied, as well as the effect of treatment and air temperature on drying speed. The experimental curves presented in terms of reduced moisture content as a function of drying time are approximated by mathematical models of existing drying kinetics. The effective diffusion coefficients of the different samples with their treatment were determined essentially based on an approximation of the logarithm of the reduced humidities by the solution developed by Cranck on the diffusion equation. The values found for the effective diffusivity are 2, 6669〖10〗^(-8) , 2, 9630210〖10〗^(-8) and 3, 40115〖10〗^(-8) respectively for the samples with peanut paste, with spices and without pre-treatment. The analysis of these results allowed to conclude on the thermal performance of the dryer but also that the "Henderson and Pabis", "Midilli et al" and "Logarithmic" models can be proposed respectively as the most reliable models to describe the evolution of the reduced moisture content as a function of time of the sample without treatment, with peanut paste and with spices.

Robust studies highlighted the valuable role of student-centered learning approach to acquire the full range of “life skills” among modern learners. Undeniably, the fact that the interaction in learning milieus are so diverse, hence, we need to examine available variables that may influence the validation of skill competencies obtained from learner-centered environment. Results of the study shows that age and religion are insignificant variables to influence the development of soft skill in student-centered approach. Males have better cognitive skills while females are more digitally literate. K12-strand particularly technical vocational is a factor to consider in cognitive development. Academic discipline is a variable that influence enhancement of communication and digital literacy. Pre-college student-centered learning teaching method is variable that affects cultivation of almost all life skills. The study confirmed the enhancement of 21stcentury soft skills: collaboration, digital literacy, communication, creativity, self-directed learning, cognitive, critical thinking skills in student-centered approach.

Denial of service attack was a stretch of Distributed Denial of Service Attack (DDoS). DDoS comes the largest security risks and problems facing Internet users. This risk affecting obstruct with work of any system of targeted organizations, which leads to the harassment of system customer. This attack succeeds by exploiting several weaknesses to access resources in the target organizations. The attacker exhausts all capacity of resources in a period short time. The previous method leads to the denial of using any organization's resources from any authorized user. This paper illustrated DDoS attack and flooding concept have been proposed. This paper deals in general with describing structural approach of DoS attack in different levels of services. In addition, content explains the motivations of the attackers to use different attacks. In particular, the concept of DDoS attack has been clarified. Also describing types of different flooding attack with examines SYN-flood and flooding attack.

In recent years, the marketing channel strategy has been gaining attention among scholars since it is one of the utmost important aspects of marketing mixes. It can lead to the success or failure of multinational business expansion into foreign countries. This go-to-market, or channel strategy, is responsible for transferring products from manufacturers to shoppers and consumers at the right place, right time, and right price. The key success factors for multinational corporations in Thailand can be attributed to the marketing channel strategy. Currently, there is a lack of evidence indicating how these corporations bring the theory to life in the local context, especially when there is a variance between the conditions of the company’s home country and new market. This article will bring to attention the way in which these theories are carried out across 3 key businesses specializing in fast-moving consumer goods. It was found that there are 4-steps in designing marketing channel strategies. These are being employed by analyzing customer needs, clearly defining channel objectives, selecting the channel mixes, and evaluating channel performance, all done to continuously improve the channel execution. In addition, there are more add-on options which are used to make the process more rigorous, for example, customer journey studies, key performance indicators on distribution, sales and profitability aspects, omni channel strategies and rigorous internal and external sources of information for evaluation, all in a timely manner.