Journal of Engineering Research and Reports <p style="text-align: justify;"><strong>Journal of Engineering Research and Reports</strong>&nbsp;<strong>(ISSN: 2582-2926)&nbsp;</strong>aims to publish high-quality papers in all areas&nbsp;of engineering. By not excluding papers based on novelty, this journal facilitates the research and wishes to publish papers as long as they are technically correct and scientifically motivated. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer-reviewed, open-access INTERNATIONAL journal.</p> <p style="text-align: justify;">This is an open-access journal which means that all content is freely available without charge to the user or his/her institution. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, without asking prior permission from the publisher or the author. This is in accordance with the BOAI definition of open access.</p> en-US (Journal of Engineering Research and Reports) (Journal of Engineering Research and Reports) Wed, 25 Jan 2023 10:12:14 +0000 OJS 60 Design and Implementation of Solar Power and an IoT-Based Pisciculture Management System <p><strong>Introduction: </strong>Pisciculture means fish farming for commercial purposes in a pond or in an artificially created fish tank. Proper care is needed for optimum fish yields.</p> <p><strong>Aims: </strong>The present research aims to design, simulate, implement, and test a low-cost pisciculture monitoring system to get the environmental status of a fishing pond where aquatic plants and fishes reside. The objective of this work is to produce high-quality and high yields of fish in the pond keeping the standard or prescribed states of the pond water.</p> <p><strong>Study Design:</strong>&nbsp; The factors that affect the pond environment are flow rate, <em>p<sup>H</sup></em> level, oxygen level, temperature, humidity, etc. To get high yields of fish from a pond, these factors must be within a specified level. If the values of these parameters go below or above the prescribed level then the water loses its quality and thereby fishes find it very difficult to survive in that pond because each water quality factor affects the health conditions of fish. Therefore, it is necessary to monitor these parameters.</p> <p><strong>Place and Duration of Study:</strong> Department of Electrical and Electronic Engineering, Southeast University (SEU) between June 2021 and April 2022.</p> <p><strong>Methodology:</strong> In this work, we have designed an automated microcontroller, IoT, and solar power-based water quality monitoring system for a fishpond. The automated system restores the values of these factors automatically when any of these factors fail to maintain their level in the pond.</p> <p><strong>Results:</strong> After testing the prototype of the system, we found that the designed system is performing very well and showing different parameter values in the LCD screen as outputs.</p> <p><strong>Conclusion:</strong> The system is in expensive and therefore, may be employed in practice.</p> Muhibul Haque Bhuyan, Md. Ashik Ali, Sabbir Ali Khan, Md. Rashedul Islam, Tanjil Islam, Jharna Akter ##submission.copyrightStatement## Fri, 27 Jan 2023 00:00:00 +0000 Modeling of Physical and Compressive Test Properties of Tigernut Using Response Surface Approach <p>The Engineering data of tiger nut cultivated in Africa is of high importance in facilitating the design of machineries for its effective and efficient cultivation, processing, handling, storage, and postharvest activities in general. This study is aimed at determining and modeling of the physical and compressive test properties of tiger nuts as influenced by size, moisture level and loading pattern. Applying Standard procedures and a 3,4,3 response surface factorial design, the Tiger nuts were cleaned of all foreign materials and sorted into three different sizes of 6mm, 9mm and 12mm, and conditioned into four different moisture levels of 7%, 10%, 13% and 16% respectively. The results shows that the arithmetic mean diameter (AMD) ranged from 7-14.867 (mm), geometric mean diameter (GMD) ranged from 6.982-14.853 (mm), sphericity (S) ranged from 0.931-1.011, surface area (SA) ranged from 153.216 -693.382 (mm<sup>2</sup>) and the aspect ratio (AR) ranged from 0.926-1.106.&nbsp; The mass (M) of 1000 tiger nut ranged from 201-1061 (g), volume (V) ranged from 25-96 (cm<sup>3</sup>), bulk density (BD) ranged from 0.634-0.979 (g/cm<sup>3</sup>), solid density (SD) ranged from 0.712-0.989 (g/cm<sup>3</sup>) and porosity (P) ranged from 11.08-21.45. The angle of repose ranged (AOR) from 20.58<sup>o</sup>-28.85<sup>o</sup>&nbsp;while the coefficient of friction (CF) on galvanized steel and stainless-steel surfaces ranged from 0.222-0.352 and 0.201-0.02 respectively. It was observed that, as sizes and moisture level increases, AMD, GMD, S, SA, AR, M, V, BD, SD and CF all increases respectively while both P and AOR decreases as the size and moisture level increases. It was revealed that the maximum compressive stress ranged from 0.26392-2.12026 (MPa), compressive strain at maximum compressive stress ranged from 1.20168-4.58292 (mm/mm). Energy at maximum compressive stress ranged from 0.02298-0.50274 (J), the compressive load at maximum compression stress ranged from 27.5937-232.257 (N), the extension at maximum compressive stress ranged from 0.30271-4.01056 (mm). The compressive stress at break ranged from 0.20376-1.75422 (MPa). The compressive load at break ranged from 25.2221-200.257 (N). The compressive strain at break ranged from 1.39935-5.79384 (mm/mm). The compressive extension at break ranged from 0.24417-3.55188 (mm). The energy at break ranged from 0.02113-0.33018 (J). The compressive stress at yield ranged from 0.24918-2.37054 (MPa) while the compressive load at yield ranged from 15.9373-210.693 (N). ANOVA result reveals that moisture level and tiger nut sizes have significant effects on the physical properties of tiger nut measured except on sphericity. Moisture level, tiger nut sizes and loading pattern have significant effects on the compressive test properties of tiger nut tested at 95% confidence level except for Energy at maximum compressive stress and Energy at break where loading have no significant effect at 95% confidence level. Empirical models were developed for the measured Engineering properties. The experimental data generated from this study serves as strong tools for the design and development of tiger nut postharvest machineries such as an oil and milk extractor among others.</p> P. A. Omale, A. K. Aremu, M. O. Omobowale ##submission.copyrightStatement## Wed, 25 Jan 2023 00:00:00 +0000