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1368 articles for “Calculations”
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Automation of 1.5tr Air Conditioing Systems Used in Different Cabins in Different Areas
Abstract: India is the world's most populous country and temperatures in many states regularly exceed 40°C. Therefore, people living in humid climates need a means to control temperature. Scientists have determined that human comfort is between 22°C and 27°C. This research determines all the properties of air relevant to the operation of water pipes. Exploring automation in air conditioning systems with Passive Infrared Sensor is to develop and implement intelligent climate …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 11, Issue 1, 2024 · pp. 1–8 Read article
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Hopf Bifurcation–Driven Chiral Amplification in an Oregonator-Based Oscillatory Chemical System with Optimal Control of Time-Scale Separation
Abstract: Nonlinear chemical systems exhibiting oscillatory kinetics and symmetry-breaking behavior have been widely studied in the context of reaction–diffusion chemistry and crystallization processes. However, the interaction between oscillatory dynamics and chiral amplification mechanisms remains insufficiently understood within a unified dynamical systems framework. This work aims to develop and analyze a reduced-order nonlinear model that couples an Oregonator-type activator–inhibitor system with a chiral response variable, and to investigate the role of Hopf …
Published in Journal of Control & Instrumentation · Vol. 17, Issue 3, 2026 Read article
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How Mathematical Modelling and Optimisation Guide Spacecraft Trajectories
Abstract: Spacecraft trajectory design is fundamentally a mathematical problem involving the prediction, evaluation and optimisation of motion under complex physical constraints. This article explores how mathematical modelling and optimisation are used to determine feasible and efficient trajectories for spacecraft. Beginning with the simplified two-body model, the article introduces the differential equation governing gravitational motion and explains how initial position and velocity determine the subsequent trajectory. It then examines how trajectory design …
Published in Journal of Aerospace Engineering & Technology · Vol. 16, Issue 3, 2026 Read article
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Machine Learning Based Optimization of Optical Fiber Parameters for Minimizing Dispersion and Attenuation
Abstract: Optical fibers provide high-bandwidth and low-loss transmission for modern communication networks; however, attenuation and chromatic dispersion remain two important physical limitations affecting transmission distance, pulse integrity, and system capacity. Conventional optical-fiber design generally relies on analytical calculations and repeated numerical simulations to determine suitable geometric and material parameters. Such approaches become computationally demanding when several fiber parameters are simultaneously optimized. This paper presents a machine-learning-based methodology for predicting and optimizing …
Published in Trends in Opto-electro & Optical Communication · Vol. 16, Issue 2, 2026 · pp. 18–28 Read article
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Safar – Sathi: A Smart Ride-Sharing Platform
Abstract: In the midst of the increased use of the internet and technology‚ people have begun to change their transportation habits․ This is why we propose Safar-Sathi: A Smart Ride-Sharing Platform‚ a smartphone-based ride-sharing platform that provides cheap‚ convenient and secure transportation services by connecting passengers and nearby drivers․ The application can be used for user registration‚ ride booking‚ real-time tracking on GPS‚ fare calculation‚ user profile building‚ ride history‚ and …
Published in International Journal of Mobile Computing Technology · Vol. 4, Issue 2, 2026 Read article
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Seasonal Variation in Air Quality Index across Rural and Urban Bihar: A Comparative Study of Gaya City and Kusdihra Village
Abstract: Air Quality Index (AQI) is a composite indicator used to communicate ambient air-quality conditions and their potential health implications. This study examines spatial and seasonal variation in AQI between Gaya city and Kusdihra village, representing urban and rural settings in Gaya district, Bihar. Secondary AQI observations were obtained from the Central Pollution Control Board (CPCB) National Air Quality Index portal at eight fixed time-slots per day during two 20-day observation …
Published in International Journal of Climate Conditions · Vol. 3, Issue 2, 2026 · pp. 33–41 Read article
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Experimental Investigation of Thermal Transport and Thermoelectric Performance of Si-Modified Bi₂Te₃ Thin Films
Abstract: Engineering silicon secondary phases provides an effective route to tailor charge and thermal transport in Bi2Te3-based thermoelectric thin films. In this work, Bi 2 Te 3 :Si nanocomposite thin films with Si content of 0, 2.3, 4.5 and 8.2% were prepared by RF co- sputtering and the effect of Si addition on the structural, microstructural, electrical, thermoelectric and thermal transport properties was investigated. X-ray diffraction confirmed the retention of the …
Published in Journal of Thermal Engineering and Applications · Vol. 13, Issue 2, 2026 Read article
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Design and Simulation of an Optical Fiber Communication System Using MATLAB
Abstract: Optical fiber communication is widely used for high-capacity data transmission because of its large bandwidth, low attenuation, immunity to electromagnetic interference, and support for wavelength-division multiplexing. These properties make fiber a fundamental medium in access, enterprise, submarine, and backbone networks, where high data rates, low error probability, and reliable transmission over distances ranging from buildings and campuses to metropolitan and long-haul links are required. This paper presents a MATLAB-oriented design …
Published in Trends in Opto-electro & Optical Communication · Vol. 16, Issue 3, 2026 Read article