International Journal of Engineering Science Technologies https://www.granthaalayahpublication.org/ojs-sys/ijoest <p>International Journal of Engineering Science Technologies is an open access peer reviewed journal that provides bi-monthly publication of articles in all areas of Engineering, Technologies and Science. It is an international refereed e-journal. IJOEST have the aim to propagate innovative research and eminence in knowledge. IJOEST Journals has become a prominent contributor for the research communities and societies. IJOEST Journal is making the bridge between research and developments.</p> <p>Editor-in-chief:<br />Dr. Pratosh Bansal (Professor, Department of Information Technology, Institute of Engineering &amp; Technology, Devi Ahilya Vishwavidyalaya, India)</p> <p>Managing Editor:<br />Dr. Tina Porwal (PhD, Maharani Laxmibai Girls P.G. College, Indore, India)</p> Granthaalayah Publications and Printers en-US International Journal of Engineering Science Technologies 2456-8651 FACTORS AFFECTING COSMETIC SURGERY AMONG YOUNG ADULTS IN MUMBAI https://www.granthaalayahpublication.org/ojs-sys/ijoest/article/view/592 <p>This study investigates the factors influencing the decision-making process of young adults in Mumbai regarding cosmetic surgery. By combining quantitative surveys and qualitative analyses, the research explores the impact of mental health, self-image consciousness, family support, social acceptance, and other variables on individuals' choices to undergo cosmetic procedures. The findings highlight the intricate interplay of psychological, social, and cultural factors driving the rising popularity of cosmetic surgeries among young adults in Mumbai. The study emphasizes the importance of a holistic approach to comprehend these influences and suggests the development of targeted interventions to foster positive self-image and overall well-being in this demographic.</p> Hhet Sanjeev Shah Kavya Jitesh Solanki Krish Paresh Shah Manas Sonesh Shah Purav Mitulkumar Shah Copyright (c) 2024 Hhet Sanjeev Shah, Kavya Jitesh Solanki, Krish Paresh Shah, Manas Sonesh Shah, Purav Mitulkumar Shah https://creativecommons.org/licenses/by/4.0 2024-05-08 2024-05-08 8 3 1–12 1–12 10.29121/ijoest.v8.i3.2024.592 CFD MODELING AND SIMULATION OF A COUNTERCURRENT REACTOR OF HIDROTREATMENT PROCESS WITH JATROPHA CURCAS L. VEGETABLE OIL https://www.granthaalayahpublication.org/ojs-sys/ijoest/article/view/596 <p>In this work, a microscale countercurrent reactor was analyzed and simulated in CFD, and the results were compared with a drained bed reactor (TBR) which is held in the CMP+L research center. The importance of this study is to find the mathematical model of the countercurrent reactor to produce clean fuels from Jatropha Curcas L. vegetable oil and in the future scale it to an industrial level. For the hydrotreatment process, a commercial CoMo/γ-Al2O3 catalyst was used, and Jatropha Curcas L vegetable oil was used as raw material. The operating conditions that were considered for the CFD simulation were temperature 380 °C, pressure 8 MPag, LHSV 8.0 h−1. The reactor model considers a reaction mechanism 13 hydrocracking reactions of triglycerides towards renewable fuels. The CFD simulation was carried out in Fluent 18.2 in a transient state and in 3 dimensions, considering the standard k-ϵ turbulence model, the Eulerian multiphase model and the porous medium model, obtaining results very similar to the experimental ones, with a conversion of triglycerides of 0.996% and the retention time of the liquid temperature was 169 seconds and in the simulation is 200 seconds, the molar concentration profiles of the products were obtained whereby this model can be applied to the industrial scale.</p> Pablo Vizguerra Morales Fabian S. Mederos Nieto Copyright (c) 2024 Pablo Vizguerra Morales, Fabian S. Mederos Nieto https://creativecommons.org/licenses/by/4.0 2024-05-21 2024-05-21 8 3 13–24 13–24 10.29121/ijoest.v8.i3.2024.596 MOUNTAINOUS ROAD ROCK ENGINEERING: TECHNIQUES, ENVIRONMENTAL IMPACTS, AND SUSTAINABLE DEVELOPMENT STRATEGIES https://www.granthaalayahpublication.org/ojs-sys/ijoest/article/view/603 <p>This paper comprehensively explores the key technologies and their implementation in mountainous road rock engineering, particularly under complex geological conditions and environmental challenges. Initially, the paper analyzes the geological characteristics of rock bodies, including rock types and geological structures, and assesses the stability of these rock bodies based on these characteristics. Subsequently, it details current construction techniques such as anchoring, shotcreting, and support structures and discusses the use of green materials and the implementation of ecological restoration projects to minimize the impact on the mountainous ecosystem. Through the analysis of successful and unsuccessful engineering cases, the paper summarizes the key factors ensuring project success, as well as lessons learned from failures. Finally, the paper anticipates future technological trends in mountainous road rock engineering, emphasizing the importance of intelligent monitoring, ecological engineering, and new material technologies. This study aims to provide scientific guidance and reference for mountainous road rock engineering, striving for technological optimization and environmental sustainability.<br />The following will guide the structure of your abstract:<br />Motivation/Background: This study addresses the challenges of mountainous road rock engineering under complex conditions, aiming to enhance practices for ecosystem balance and technological sustainability.<br />Method: The research assesses geological characteristics, construction techniques, and ecological integration, analyzing both successful and failed projects to derive key insights and strategies.<br />Results: Results underline the effectiveness of construction methods, ecological benefits of green practices, and crucial insights from case study evaluations, highlighting technological advancements.<br />Conclusions: Concluding that robust understanding and strategic application of technologies are crucial, the study underscores the importance of ecological and technological advancements in improving mountainous road rock engineering.</p> Chuan Duan Copyright (c) 2024 Chuan Duan https://creativecommons.org/licenses/by/4.0 2024-05-21 2024-05-21 8 3 25–33 25–33 10.29121/ijoest.v8.i3.2024.603 TIME AND COST EFFICIENCY ANALYSIS OF ACEH TENGAH REGENCY POM WORKSHOP PROJECT: A CRITICAL PATH METHOD APPROACH https://www.granthaalayahpublication.org/ojs-sys/ijoest/article/view/604 <p>The study addresses construction delays in the Aceh Tengah Regency POM Workshop project, valued at IDR 6,414,000,000 and spanning approximately 1,507 m2 across two floors. Motivated by the need for a comprehensive understanding of activity relationships and critical paths, the research aims to assess project duration, costs, and efficiency. Employing the Critical Path Method (CPM) due to data constraints, the study elucidates activity dependencies, network planning, and critical paths. Data collected from relevant stakeholders include schedule and cost budget plans. The analysis reveals a potential acceleration of 21 days, reducing the project duration from 126 to 105 days with a 99.74% probability. Cost control indicates an escalation to IDR 6,949,573,170.20 after calculating direct costs, with a daily increase of 0.92%. The findings underscore the significance of CPM in project management, offering insights into optimizing timelines and costs. The study highlights the importance of efficient project management methodologies in addressing construction delays and managing project budgets effectively.</p> Hafnidar A. Rani Fida Filaya Maina Muhammad Shafly Aqsha Muhammad Hafidz Mubarak Copyright (c) 2024 Hafnidar A. Rani, Fida Filaya Maina, Muhammad Shafly Aqsha, Muhammad Hafidz Mubarak https://creativecommons.org/licenses/by/4.0 2024-05-21 2024-05-21 8 3 34–46 34–46 10.29121/ijoest.v8.i3.2024.604