Newsletter Vol. 3 Issue 1
Scientific & Technical Research Association
info@eurasiaresearch.org
Dear STRA Members,
Thank you for your interest and support in our organization. We are happy to present the newsletter for our Association. Here are some of the glimpses of our current and upcoming endeavors.
Conferences Held
STRA has successfully organized following International conferences in the period of December 2017 – March 2018:
- 22-Dec- 2017 to 23-Dec- 2017 at Flora Grand Hotel, Near Al Rigga Metro Station, Deira, Dubai, United Arab Emirates
- 29-Dec- 2017 to 30-Dec- 2017 at Asian Institute of Technology (AIT), Conference Center, Bangkok, Thailand
- 20-Feb- 2018 To 21-Feb- 2018 at Flora Grand Hotel, Near Al Rigga Metro Station, Deira, Dubai, United Arab Emirates


Asian Institute of Technology (AIT), Conference Center, Bangkok, Thailand



Remelyn L. Asahid
(University of Mindanao, Davao City, Philippines)
Asian Institute of Technology (AIT), Conference Center, Bangkok, Thailand
Paper Title: Internet Self-Efficacy And Interaction Of Students In Mathematics Courses
Abstract: Interaction creates an essential environment in learning Mathematics effectively and opportunities for teachers and students to talk about their own thinking, and reflection on students’ learning process. This study was conducted to identify the underlying relationship between internet self-efficacy and interaction of the freshmen students in Mathematics courses. The study used a descriptive-correlational technique involving 439 students from the selected universities and colleges in Davao City, and criterion sampling were used. Findings revealed that the respondents had extensive internet self-efficacy and interaction in Mathematics courses. The results further revealed a strong significant relationship between internet self-efficacy and interaction in Mathematics courses. The results of regression analysis also revealed that the three predictors of internet self-efficacy had a significant influence on interaction in Mathematics courses and suggested that a reasonable percentage of the variance on interaction in Mathematics courses can be explained by the three predictors. Furthermore, among the three predictors, the extent of self-efficacy in system manipulation was the most influential factor that contributed to the level of interaction in Mathematics courses.
Keywords: Reverse osmosis, Forward osmosis, Response surface methodology, Chemical cleaning
In each, Europe International conference, the BEST PAPER award is given to best researchers. In STRA, the Best paper award is given to the participants with the best scholarly paper submitted and presented at the conference.
Safaa M. Alsobhi
(Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia)
Flora Grand Hotel, Near Al Rigga Metro Station, Deira, Dubai, United Arab Emirates
Paper title: Thermal conduction in SiC
Abstract:
This work presents detailed and systematic theoretical investigations of the thermal conductivity of seven different SiC samples prepared by different experimental groups under different conditions and contain different levels of impurities. The study is based on applying the full form of the Callaway’s theory and employing the Srivastava’s rigorous treatment of the three-phonon interactions. Our theoretical results are in a very good agreement with the reported experimental measurements for samples studied in this work. This study provides quantitative analysis of the contributions from different scattering processes towards thermal resistivity of SiC over a large range of temperature. The contribution from N-drift term to the thermal conductivity at different temperatures has also been quantified. The mode-average phonon mean-free path has been calculated and presented.


Pattarasiri Fagkaew
(Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea)
Asian Institute of Technology (AIT), Conference Center, Bangkok, Thailand
Paper Title: Optimization of Chemical Cleaning Conditions for Reverse Osmosis Process by The Response Surface Methodology Coupled With forwarding Osmosis Testing Set-Up
Abstract: Fouling is a major limitation of a reverse osmosis (RO) process not only due to decreasing the water flux, but also change the solute rejection. The chemical cleaning to restore RO membrane performances can be distinguished into two steps; an acidic agent aims to remove inorganic precipitates and an alkaline agent aims to remove organic matters. In this study, the optimization protocols for the chemical cleaning conditions in RO process using response surface methodology (RSM) coupled with forwarding osmosis (FO) testing set-up was proposed. The fouled membrane pieces were chemically cleaned by a commercially available acidic and alkaline solution according to the RSM designed conditions of various pH, concentrations, and temperatures. Then, the membrane permeability and salt rejection were examined in FO mode. Based on response surface plots, the most influential factor in membrane permeability was the concentration of chemical agent, whereas pH and temperature were not significant as much as the concentration. The optimum cleaning conditions were 3% of an acidic agent concentration and ambient pH after adding acidic chemicals followed by 3% of an alkaline agent concentration and controlled pH lower than 13 due to the membrane operating limitation. Both steps carried out at 30°C. At the suggested optimal conditions, the water flux was recovered of 86.07% with the salt rejection of 83.56%, compared to a virgin membrane in RO mode. Therefore, the RSM coupled with FO testing set-up could provide the better understanding of the relationship between factors and significant factors which affected the membrane permeability. In addition, it could be used as the fast and effective method to determine optimal cleaning strategies for chemical cleaning agents in the RO membrane process.
Keywords: Reverse osmosis, Forward osmosis, Response surface methodology, Chemical cleaning
Paper Title: Optimal Control of Neutral Lipids in Microalgae Production with Nutrient Limitation
Keywords: Microalgae, Carbon Dioxide, Nutrient Limitation, Optimal Control, Pontryagin Maximum Principle.


