Browsing by Author "Hosain, Md. Sarwar"

Now showing 1 - 3 of 3

A Plowing T-shaped Patch Antenna for WiFi and C Band Applications
(2021 International Conference on Automation, Control and Mechatronics for Industry 4.0 (ACMI), IEEE, 2021-09-08) Haque, Md Ashraful; Paul, Liton Chandra; Kumar, Subroto; Azim, Rezaul; Hosain, Md. Sarwar; Zakariya, M Azman
In this paper, a plowing T-shaped microstrip patch antenna (MPA) is proposed which can be used for 5 GHz WiFi (5.180 GHz – 5.925 GHz), 6 GHz WiFi (5.940 GHz – 7.075 GHz) and C band (4GHz – 8GHz) satellite applications. The dielectric substrate of Arlon Cu 217LX (lossy) material having a dielectric constant (εr) of 2.2 and loss tangent (δ) of 0.0009 has been used in the proposed design. The length (L) and width (W) of the substrate are 40 mm and 50 mm respectively. The proposed antenna covers a radiation frequency range of 4 GHz - 8 GHz and possesses gain of 3.55 dB to 6.4 dB over the entire bandwidth of the antenna. The antenna's resonance frequency is 5.78 GHz with a -31.08 dB return loss. The radiation efficiency of the antenna varies from 74% to 90% within the entire radiating frequency band. This antenna has been designed and optimized using CST MW studio. Finally, the results of CST MW studio have been buttressed by Zeland IE3D which reflects good matching between two simulators.
Efficacy and Acceptance of Virtual Classrooms During COVID-19
(Daffodil International University, 2021-06-13) Halder, Nabarun; Islam, S. M. Rakibul; Hosain, Md. Sarwar; Ahmed, Eshtiak; Islam, Ashraful; Noori, Sheak Rashed Haider
The sudden spread of COVID-19 shut down educational institutions worldwide, and Bangladesh was no exception. Educational institutions were forced to start their activities online; there was no alternative to keep the students in the study. Although online education has been seen as part of a futuristic approach, its effectiveness and acceptability still remains questionable when it comes to institutional education. It's yet to be investigated if online education can be as effective as contact teaching. We conducted an online survey to determine what students feel about online classes, how they accepted online classes, and how useful it was for them depending on their current situation. Our survey was open to everyone who has taken online classes during COVID-19, and the number of participants in our survey was 210. The survey provided with both qualitative and quantitative data which were then categorized into themes for analysis. Findings suggest, that most students feel that by rethinking the class style, if teachers can provide well-structured lecture content and have an equal focus on all students, it can be an alternative for them during emergency days.
Efficacy and Acceptance of Virtual Classrooms during Covid-19
(2021 3rd International Congress on Human-Computer Interaction, Optimization and Robotic Applications (HORA), IEEE, 2021-08-25) Halder, Nabarun; Islam, S. M. Rakibul; Hosain, Md. Sarwar; Ahmed, Eshtiak; Islam, Ashraful; Noori, Sheak Rashed Haider
The sudden spread of COVID-19 shut down educational institutions worldwide, and Bangladesh was no exception. Educational institutions were forced to start their activities online; there was no alternative to keep the students in the study. Although online education has been seen as part of a futuristic approach, its effectiveness and acceptability still remains questionable when it comes to institutional education. It's yet to be investigated if online education can be as effective as contact teaching. We conducted an online survey to determine what students feel about online classes, how they accepted online classes, and how useful it was for them depending on their current situation. Our survey was open to everyone who has taken online classes during COVID-19, and the number of participants in our survey was 210. The survey provided with both qualitative and quantitative data which were then categorized into themes for analysis. Findings suggest, that most students feel that by rethinking the class style, if teachers can provide well-structured lecture content and have an equal focus on all students, it can be an alternative for them during emergency days.