International research journal of engineering, IT & scientific research https://sloap.org/journals/index.php/irjeis <p style="text-align: justify;"><strong>IRJEIS&nbsp;</strong>is published in English and it is open to authors around the world regardless of the nationality. It is currently published three times a year, i.e. in&nbsp;<em>January, March, May, July, September,&nbsp;</em>and<em>&nbsp;November.</em></p> SLOAP en-US International research journal of engineering, IT & scientific research 2454-2261 <p>Articles published in the International Research Journal of Engineering, IT &amp; Scientific research (<strong>IRJEIS</strong>) are available under Creative Commons Attribution Non-Commercial No Derivatives Licence (<a href="https://creativecommons.org/licenses/by-nc-nd/4.0/" target="_blank" rel="noopener">CC BY-NC-ND 4.0</a>). Authors retain copyright in their work and grant <strong>IRJEIS&nbsp;</strong>right of first publication under CC BY-NC-ND 4.0. Users have the right to read, download, copy, distribute, print, search, or link to the full texts of articles in this journal, and to use them for any other lawful purpose.</p> <p>Articles published in <strong>IRJEIS&nbsp;</strong>can be copied, communicated and shared in their published form for non-commercial purposes provided full attribution is given to the author and the journal. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (<em>e.g., post it to an institutional repository or publish it in a book</em>), with an acknowledgment of its initial publication in this journal.</p> <p>This copyright notice applies to articles published in <strong>IRJEIS&nbsp;</strong>volumes 6 onwards. Please read about the copyright notices for previous volumes under&nbsp;<a href="https://sloap.org/journals/index.php/irjeis/history">Journal History</a>.</p> Preventive maintenance of taper bearing using Arduino in the application of industry 4.0 https://sloap.org/journals/index.php/irjeis/article/view/953 <p style="text-align: justify;">The maintenance of industrial tools is very important to support production. Therefore, many companies apply preventive maintenance. A national industrialization agenda discussed that it is crucial especially in the manufacturing industry. The battery-powered IoT sensing device is capable of thorough monitoring of industrial machinery enabling the development of sophisticated predictive maintenance applications under set scenarios. In this paper, we applied the concept of the Internet of Thing (IoT) system using LabVIEW via Arduino. The research method used in this study was similar to Susanto et al. (2019) namely Frequency Response Function (FRF) test to investigate the dynamic characteristics of a mechanic structure to identifying damages on X, Y, and Z axes of tapered bearing using harmonic vibration from handphones. Results of FRF and Labview via Ardunio were then compared to identify the results of measurement using LabView via Arduino. It was found much noise in the measurement occupying Labview Via Ardunio because its system does not use a filter like the one in FFT Analyser. However, in general, LabVIEW via Ardunia can predict damages in taper bearing. It is because, under broken condition, there was a two-time movement of natural frequencies from good condition.</p> Subekti Subekti Hadi Pranoto Beni Rukasah Salmon Setyo Qomarudin Yusuf Suyadiyanto Suyadiyanto Ari Slamet Ariyadi Abdul Hamid ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-nd/4.0 2020-07-08 2020-07-08 6 4 1 14 10.21744/irjeis.v6n4.953 Mathematical modeling and numerical simulation of porous media single-phase fluid flow problem: a scientific review https://sloap.org/journals/index.php/irjeis/article/view/955 <p style="text-align: justify;">The complexity of porous media makes the classical methods used to study hydrocarbon reservoirs inaccurate and insufficient to predict the performance and behavior of the reservoir. Recently, fluid flow simulation and modeling used to decrease the risks in the decision of the evaluation of the reservoir and achieve the best possible economic feasibility. This study deals with a brief review of the fundamental equations required to simulate fluid flow through porous media. In this study, we review the derivative of partial differential equations governing the fluid flow through pores media. The physical interpretation of partial differential equations (especially the pressures diffusive nature) and discretization with finite differences are studied.&nbsp; We restricted theoretic research to slightly compressible fluids, single-phase flow through porous media, and these are sufficient to show various typical aspects of subsurface flow numerical simulation. Moreover, only spatial and time discretization with finite differences will be considered. In this study, a mathematical model is formulated to express single-phase fluid flow in a one-dimensional porous medium. The formulated mathematical model is a partial differential equation of pressure change concerning distance and time.&nbsp; Then this mathematical model converted into a numerical model using the finite differences method.</p> Yahya Jirjees Tawfeeq ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-nd/4.0 2020-07-09 2020-07-09 6 4 15 28 10.21744/irjeis.v6n4.955