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1059 articles for “Operational research”
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Comparative Analysis of P, PI, and PID Controllers Based on Time Domain Specifications
Abstract: In this research, proportional (P), proportional-integral (PI), and proportional-integral-derivative (PID) controllers utilized in control systems are thoroughly compared. The study attentions on assessing system presentation with time-domain specifications such as rise time, settling time, overshoot, and steady-state error. Mathematical modeling and controller design are discussed, shadowed by analytical comparison. The results establish that while P and PI controllers offer simplicity, PID controllers provide superior performance in terms of stability and …
Published in International Journal of Advanced Control and System Engineering · Vol. 4, Issue 2, 2026 Read article
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Design and Simulation Study of Drug-Eluting Stents for Treating Hepatic Artery Stenosis Post Liver Transplantation
Abstract: Hepatocellular carcinomais amongst the most common cancers worldwide, accounting for nearly 1 million deaths annually. Early diagnosis would help in treating with chemotherapy and ablative techniques but with most of the liver being affected; only transplantation would be a treatment of choice. Apparently, after orthotopic liver transplantation (OLT), an issue of hepatic artery stenosis (HAS) can occur which would later lead to hepatic artery thrombosis (HAT), with subsequent liver failure …
Published in Research & Reviews: A Journal of Bioinformatics · Vol. 7, Issue 1, 2020 · pp. 7–13 Read article
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Effect of WEDM Machining Parameter on the MMC: A Review
Abstract: Recent area of manufacturing is highly focus on good accuracy and a complex shapes are mechanized by the advanced machining operation. The wire electrical discharge machining (WEDM) have the ability to produce the complex shapes with having high accuracy. The WEDM is non-contact type machining operation and is used for metal materials as well as Metal Matrix Composites (MMCs), ceramics composites those have many application in vast areas such as …
Published in International Journal of Fracture Mechanics and Damage Science · Vol. 1, Issue 1, 2023 · pp. 1–7 Read article
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AI and E-Commerce in the Sultanate of Oman and its Prospects
Abstract: In line with the Sultanate of Oman's strategic vision for 2040, there has been a notable surge in prioritizing information and communication technology. Emphasizing the imperative of digital transformation, this vision underscores the necessity for both public and private institutions to continually evolve and enhance their administrative functions and services. Digital transformation extends beyond mere technological integration, presenting a holistic organizational restructuring, encompassing internal operations to public service delivery. A …
Published in E-Commerce for Future & Trends · Vol. 11, Issue 1, 2024 · pp. 23–29 Read article
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Implementation of Energy-efficient Axial Fans for Air Handling Unit Using AI Model
Abstract: This research explores the integration of energy-efficient axial fans in Air Handling Units (AHUs) within a large automotive manufacturing facility to enhance HVAC (heating, ventilation, and air conditioning) performance and reduce energy consumption. Standard AHUs in the facility’s clean rooms and other spaces utilize traditional blower fans, which primarily rely on static pressure, limiting their efficiency. By replacing these with electronically commutated (EC) axial flow fans, which leverage both static …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 11, Issue 3, 2024 · pp. 28–34 Read article
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Comparative Analysis of Energy Storage System’s Hybridization for Electric Vehicles: Evaluating Lithium-Ion Batteries, Supercapacitors, and Fuel Cells on Performance Metrics
Abstract: High-performance energy storage systems (ESS) in electrically powered cars are becoming more and more necessary as transportation options become more environmentally conscious. This research provides a thorough comparison of hybrid energy storage systems (HESS) that link fuel cell technology, supercapacitors, and batteries made of lithium ion. Critical performance metrics are assessed for each technology, including energy density, power density, efficiency, lifecycle durability, thermal performance, cost and sustainability. It summarizes the …
Published in International Journal of Machine Systems and Manufacturing Technology · Vol. 3, Issue 1, 2025 · pp. 12–29 Read article
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Power Distribution Network Restoration for Critical Load Conditions During Natural Disasters Using Distributed Energy Resources
Abstract: Electricity is getting a lot of attention these days because it is required for the smooth operation of many critical services (water, gas, communication, and so on). In order to assure a stable power supply, the electric distribution network is the final stage in sending electrical energy from the transmission scheme to users. Major disasters are unpredictable, unwanted, and unpreventable events. These impacts are magnified and intensified by damaging the …
Published in Trends in Electrical Engineering · Vol. 12, Issue 3, 2022 · pp. 30–41 Read article
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An Investigation of Designing for Changes in User Interface (UI), User Experience (UX), and Understanding
Abstract: Interface technologies have progressed into CUI, GUI, and NUI because of the advancements in Internet of Things, mobile, and cloud computing technologies. A new UI/UX design is anticipated to be created in the future. In this study, we demonstrated our knowledge of the internet, operating systems, contents, and gadgets, as well as our capacity to produce interfaces. For 29 participants, including sophomores, juniors, and seniors in IT departments, a list …
Published in Journal of Open Source Developments · Vol. 10, Issue 3, 2023 · pp. 20–24 Read article
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Performance and Degradation Analysis of PolyCrystalline PV Modules Installed in Tropical Conditions
Abstract: In this paper, practical field performance of poly-crystalline solar photovoltaic (PV) modules, which were installed at rooftop of the department of electrical engineering BVRIT, has been studied and the correlation between efficiency, temperature and degradation rate of modules as per STC conditions has been presented. The nominal output power of the PV module considered for the study is 240 Wp and the panel is compressed of 60 cells in a …
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 4, Issue 3, 2016 · pp. 5–10 Read article
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Biochar-based nano-composite for the removal of dyes from the wastewater
Abstract: This research work focuses on recent applications of biochar’s nano composites, produced from biomass pyrolysis, in water and wastewater treatment. Pyrolysis of wood is the possible path for converting biomass to higher valuable products such as bio-oil, bio-char and bio-gas. This work focused on the formation, analysis of bio-char based nanocomposites which was obtained from the wood pyrolysis. A FT-IR technique was used for the determination of groups present in …
Published in Journal of Water Pollution & Purification Research · Vol. 5, Issue 1, 2018 · pp. 25–30 Read article
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Numerical Analysis of Oblique Impinge shock-wave/turbulent boundary-layer interaction Using Reynolds Average Navier Stroke Equations
Abstract: Interaction of shock waves with turbulent boundary layer plays an important role in the design and operability of high-speed aerospace vehicles and air-breathing engines. During interaction, the adverse pressure gradient of the shock is often strong enough to separate the boundary layer. Reynolds averaged Navier-Stokes simulations using conventional turbulence models do not predict the correct size and shape of the separation bubble in strong shock/turbulent boundary-layer interactions. The corresponding surface …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 8, Issue 3, 2019 · pp. 31–48 Read article
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Review on Local News’s Transition Towards Digital Media
Abstract: The development of a contemporary news web application is centered around delivering a captivating user experience replete with advanced functionalities for consuming news. Tailored for daily newspaper readers, the application offers a seamless blend of reading and auditory experiences, allowing users to listen to news articles. Its dynamic homepage algorithmically curates content based on users' historical searches, presenting them with articles that align with their interests. A real-time comment section …
Published in International Journal of Information Security Engineering · Vol. 2, Issue 1, 2024 · pp. 22–28 Read article
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Analysis of the Output Power in Offshore Bladeless Vibrational Wind Turbines
Abstract: This work focuses on studying and analyzing the power generation in offshore bladeless vibrational wind turbines. In previous work, we developed detailed research about the vibrational wind turbine design and configuration; in this new work, we analyze the energy supply from this type of turbine to achieve a better understanding of the behavior and potential of bladeless vibrational wind turbines (BVWT) as an additional power source in offshore wind farms. …
Published in Journal of Offshore Structure and Technology · Vol. 11, Issue 3, 2024 · pp. 12–23 Read article
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Challenges and Innovations in Designing Underground Reservoirs for Urban Water Management
Abstract: Drawing on the technical, environmental and social aspects of underground reservoirs, this research investigates their potential to improve urban water management. The study identifies main issues in reservoir design and deployment, analyses effectiveness of existing solutions to drought and flooding problems, and compares the application of new technologies and materials in the field, as well as considers views and attitudes of involve parties and citizens. The study used both quantitative …
Published in Journal of Water Resource Engineering and Management · Vol. 12, Issue 2, 2025 · pp. 1–24 Read article
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Evaluate the effectiveness of nurse led interventions on knowledge and practice regarding nursing care of chest tube drainage among nursing personnel’s working at medical and surgical wards of PGIMS Rohtak Haryana
Abstract: Introduction: The present study was conducted to determine the nursing personnel’s level of knowledge and practice the care of chest tube drainage to improve the quality of nursing care. A chest tube insertion is surgical procedure in which a hollow, flexible drainage tube is inserted through the side of the chest into the plural space in order to drain the plural cavity air, blood, pus or lymph. The water seal …
Published in Research and Reviews: A Journal of Health Professions · Vol. 13, Issue 3, 2023 · pp. 84–90 Read article
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The Effect of Temperature on Possible Microorganisms Isolated and Identified in Freshwater and Saltwater Media from Mixed Crude Oil
Abstract: The investigation of the effect of temperature on the characteristics and properties of microorganisms isolated and identified in freshwater and saltwater media mixed with crude oil demonstrates the potential impact of temperature variation under different bioreactor conditions. However, temperature was identified as an inhibitor of microbial growth, resulting in a decrease in the population of individual organisms sampled during the investigation. This trend was observed in both freshwater and saltwater …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 17, Issue 2, 2026 · pp. 36–47 Read article
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Life Cycle Costing of Sewage Treatment Plant
Abstract: Abstract In this fast growing life, every industry and organization needs proper management for time, money, resources, and material. Time and cash management is most necessary for construction industry. Life cycle costing (LCC) is a process of evaluating the economic performance of a structure over its entire life. The process of identifying and documenting all the costs involved over the life of as asset is known as life cycle costing. …
Published in Journal of Water Pollution & Purification Research · Vol. 3, Issue 1, 2016 · pp. 20–24 Read article
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Model to Predict a Ratio Control of Hydrocarbon Acid and Water in a Packed Bed Reactor
Abstract: Model development was carried out to examine the ratio of hydrochloric acid gas and water in a packed bed reactor. The research predicted increase in output with increase in time, revealing the effectiveness ratio control of hydrochloric acid separation from water using absorption column mechanism. The density of the products played an active role in the separation process as well as in control action function. The developed model can be …
Published in Emerging Trends in Chemical Engineering · pp. 45–52 Read article
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Design and Implementation of High-Speed Low Power Low Area Hybrid One Bit Full Adder Using CMOS Technology
Abstract: In this article, we'll take a look at a new kind of Full Adder (FA) design that mixes traditional Complementary Metal Oxide Semiconductors (CCMOS) with Pass Transistors (PTs) and Transmission Gates (TGs). To analyze the circuit's performance, we used the Mentor Graphics software package. Since all twenty (20) varieties of Full Adder circuits were able to be measured and compared, this research was conducted. When the clock rate of the …
Published in International Journal of VLSI Circuit Design & Technology · Vol. 1, Issue 2, 2023 · pp. 29–39 Read article
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Model to Predict a Ratio Control of Hydrocarbon Acid and Water in a Packed Bed Reactor
Abstract: Model development was carried out to examine the ratio of hydrochloric acid gas and water in a packed bed reactor. The research predicted increase in output with increase in time, revealing the effectiveness ratio control of hydrochloric acid separation from water using absorption column mechanism. The density of the products played an active role in the separation process as well as in control action function. The developed model can be …
Published in Emerging Trends in Chemical Engineering · Vol. 8, Issue 1, 2021 · pp. 45–52 Read article