Search
90 articles for “state equation”
-
Analytical Study on Humidity Sensing of Nanostructured Tin Oxide
Abstract: Nanocrystalline tin oxide powder was prepared by a mechanochemical method. The synthesised powder was characterised using X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD shows the crystalline nature of the synthesised material. The crystallite size was estimated using Debye–Scherrer equation and its minimum value was 9 nm. Surface morphologies of the sensing pellets were investigated using SEM. Pellets as well as thick films were used as sensing elements for …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 10, Issue 3, 2020 · pp. 1–7 Read article
-
Methodology for Evaluating Driver’s Attitudes towards Transportation Demand Management Strategies in Lahore, Pakistan
Abstract: The transportation demand management (TDM) strategies consider as an important tool to solve urban congestion related problems both in objective and subjective manner. This study attempted to explore attitudes of rickshaw, taxi, and truck drivers towards soft and hard strategies considering driver’s various lifestyles and attitudes. Structural equation modeling (SEM) technique used in order to predict driver’s behavior towards each specific TDM strategy using the behavioral theories as a frame …
Published in Recent Trends in Civil Engineering & Technology · Vol. 2, Issue 1-3, 2012 · pp. 78–92 Read article
-
Population biology of the Sleeper fish Eleotris vittata from New Calabar River , Port Harcourt, Nigeria
Abstract: The population of Eleotris vittata was studied in the New Calabar River over a period of twelve months with the aim of providing a baseline data for the management of the stock; this was due to unavailability of information on the status of the stock. Analysis for growth using the Von Bertalanffy function revealed that length infinity was 26.34cm, parameter of curvature was 1.18cm/year, and the growth performance index was …
Published in Research & Reviews : Journal of Ecology · Vol. 8, Issue 2, 2019 · pp. 28–31 Read article
-
Digital Twin Assisted Intelligent Prediction of Polymer Composite Degradation Under Environmental Exposure
Abstract: Polymer matrix composites (PMCs) deployed in aerospace, marine, automotive, and renewable-energy structures are continuously subjected to coupled environmental stressors — ultraviolet (UV) radiation, moisture ingress, thermal cycling, and mechanical loading — that progressively degrade their mechanical performance. Conventional accelerated ageing tests and empirical lifetime models are time-consuming, destructive, and poorly suited to in-service, asset-specific degradation forecasting. This paper proposes a Digital Twin (DT) assisted intelligent prediction framework that fuses a …
Published in Journal of Polymer & Composites · Vol. 14, Issue 4, 2026 Read article
-
Reliability-Aware Mathematical Model for Radiation-Hardened Satellite Communication Systems
Abstract: Satellite communication systems operate in radiation environments in which total ionizing dose (TID), displacement damage, and single-event effects (SEE) can progressively degrade electronic, optoelectronic, and communication components and can ultimately reduce link availability and mission reliability. This paper develops a Reliability-Aware Radiation-Hardened Satellite Communication Model (R-RHSCM) that mathematically couples the orbital radiation environment, accumulated radiation dose, component degradation, communication-link performance, single-event failure probability, redundancy, thermal effects, and adaptive mitigation. The …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 15, Issue 2, 2026 Read article
-
Comparative Study of Symmetric and Asymmetric Oxide Double Gate Junction less FET
Abstract: We carry out the performance of symmetric oxide (HfO2+HfO2) and asymmetric oxide (SiO2+HfO2) n-type junction less field-effect transistor (JLFET) based on two- dimensional Poisson equation. This study is accomplished by simulating a symmetric and asymmetric double gate JLFET on Sentaurus, Technology Computer Aided Design (TCAD) simulator for Silicon (Si) material at room temperature and varying temperature in between 300-360 k.Based on device simulation we find that the asymmetric oxide shows …
Published in Journal of Semiconductor Devices and Circuits · Vol. 8, Issue 2, 2021 · pp. 14–20 Read article
-
Comparative Study of Symmetric and Asymmetric Oxide Double Gate Junction less FET
Abstract: we carry out the performance of symmetric oxide (HfO2+HfO2) and asymmetric oxide (SiO2+HfO2) n-type junction less field-effect transistor (JLFET) based on two- dimensional Poisson equation. This study is accomplished by simulating a symmetric and asymmetric double gate JLFET on Sentaurus, Technology Computer Aided Design (TCAD) simulator for Silicon (Si) material at room temperature and varying temperature in between 300-360 k. Based on device simulation we find that the asymmetric oxide …
Published in Journal of Semiconductor Devices and Circuits · Vol. 8, Issue 4, 2021 · pp. 14–20 Read article
-
Steady State and Transient Analysis of 6-Pulse Rectifier Bridges Including Faulty Diodes
Abstract: This paper addresses the steady-state and transient responses of un-controlled faulty 6-pulse diode rectifier bridge circuits. The faulty bridges can include several simultaneous diode valves’ open- or short-circuits. An efficient representation of the diodes is adopted in order to describe their performance in both the forward and reverse directions. A set of simultaneous differential and algebraic equations simulating the faulty rectifier bridge is presented. Its numerical solution is obtained through …
Published in Journal of Power Electronics and Power Systems · Vol. 10, Issue 3, 2020 · pp. 19–31 Read article
-
Autonomous Agentic AI for Adaptive Cure Optimization and Defect Prevention in Thermoset Polymer Composite Manufacturing
Abstract: Thermoset polymer composites occupy a central position in modern structural manufacturing, from aircraft fuselages to wind-turbine blades. Despite progress in resin chemistry and fiber architecture, the “cure process” that transforms compliant preforms into load-bearing structures remains difficult to manage. Manufacturers encounter ‘voids’, “interlaminar delaminations”, and “spring-back distortion” when curing complex or thick-section parts. The cause is not ignorance of the relevant physics, but rather that ‘temperature’, ‘chemistry’, ‘rheology’, and ‘mechanics’ …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 301–320 Read article
-
Thermal Effects in High-Power Laser Systems: Modeling and Mitigation
Abstract: High-power laser systems are increasingly employed in industrial manufacturing, defense, medical procedures, and scientific research due to their ability to deliver high energy density with excellent spatial coherence. However, the performance and reliability of these systems are significantly influenced by thermal effects arising from optical absorption, non-radiative recombination, and inefficient heat dissipation within laser gain media and optical components. These thermal phenomena lead to adverse effects such as thermal lensing, …
Published in International Journal of Manufacturing and Production Engineering · Vol. 3, Issue 2, 2025 · pp. 9–13 Read article
-
Investigation of Optimum Stress Concentration Factor for Shoulder Fillet in Round Bar under Different Loading Conditions
Abstract: The focus of this study is to investigate the optimal fillet radius of shoulder fillet in round bar which gives minimum stress concentration factor under different loading conditions i.e. torsional, bending and axial. Peterson’s curves were developed based on experimental work and analytical work carried out by number of researchers in the past. In that curves it is stated that the r/d ratios in the curves were taken from the …
Published in Trends in Mechanical Engineering & Technology · Vol. 8, Issue 2, 2018 · pp. 18–26 Read article
-
Comparative Analyses of Select Microbial Growth Inhibited Rate Models
Abstract: Food waste is a complex substrate comprising of different mixtures of chemical compounds. The growth rate of micro-organism in such environment will experience inhibition. Consequently, the Monod’s model will not be able to describe the growth rate of its bacteria. The Aiba’s, Andrews and the Haldane’s growth rate models that are accounts for growth rate of bacteria with inhibition were compared. To do this, seven different batch experimentations; each with …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 15, Issue 1, 2024 · pp. 16–24 Read article
-
Modeling and Simulation of a Chaotic Oscillator Using Mathematica
Abstract: This paper suggests a modified methodology for the modeling and simulation of a chaotic oscillator. Its analysis and the pertinent results of an efficient Mathematica simulation program dealing with a typical Chua's circuit are presented and discussed. The derived computer code is based on the application of state-variables in the time domain. The program yields the circuit’s currents and voltages and indicates their sensitivities to changes in the numerical values …
Published in Journal of Power Electronics and Power Systems · Vol. 11, Issue 1, 2021 · pp. 28–37 Read article
-
Thermal Modelling and Simulation of Brushless D.C. Motor for Electromechanical Actuation
Abstract: A lumped-parameter thermal model is described which provides both a steady-state and transient solution to the temperatures within an electrical machine. The model is sufficiently complex to identify the temperatures at most locations in the machine, including the peak temperatures in the end winding and the surface temperatures of the rotor. It is formulated out of purely dimensional information and constant thermal coefficients and is therefore easily adapted to a …
Published in Journal of Aerospace Engineering & Technology · Vol. 3, Issue 1, 2013 · pp. 16–28 Read article
-
Physics-Adaptive Digital Twin with Neural-Operator Reduced-Order Modelling
Abstract: This study proposes a novel Physics-Adaptive Digital Twin with Neural-Operator Reduced-Order Modelling (PADT-NO) framework for predictive modelling of complex, nonlinear, and multiscale fluid flows. The proposed mathematical framework integrates fundamental conservation laws, Navier–Stokes dynamics, physics-constrained neural operators, adaptive reduced-order modelling, and uncertainty-aware state estimation within a unified computational architecture. Unlike conventional computational fluid dynamics and purely data-driven approaches, the proposed model dynamically couples high-fidelity physical information with a low-dimensional latent …
Published in Recent Trends in Fluid Mechanics · Vol. 13, Issue 2, 2026 · pp. 89–103 Read article
-
A Novel Closed form Expression of OPRA Over κ-μ/Inverse-Gaussian and η-μ/Inverse-Gaussian Fading Channel with Diversity Reception
Abstract: Abstract: In authentic wireless propagation scenario, the execution of the wireless communication is critically degraded by fading phenomenon which is generally multipath and shadowing. Considering more realistic scenario it is very necessary to develop a composite fading model and further analyze its performance metrics. In this work closed form equation of channel capacity under adjustable transmission policy with OPRA over κ-μ/Inverse-Gaussian and ημ/Inverse-Gaussian fading channel with and without maximal ratio …
Published in Journal of Microelectronics and Solid State Devices · Vol. 6, Issue 1, 2019 · pp. 7–11 Read article
-
SPICE2G and PSPICE Circuit Simulation of h and g Two Port Networks
Abstract: AbstractMethods to simulate two port electronics circuits whose hybrid (h) and inverse hybrid (g) parameters are available for circuit designer are given using Spice2G/Pspice analysis programs. Starting from the definitions of two port h parameters, Spice2G and Pspice compatible equations for various frequencies are derived and compatible sub circuits for h,g two ports are obtained both at DC and AC. Effective and extensive use of Spice2G elements (voltage/current controlled current/voltage …
Published in Recent Trends in Electronics Communication Systems · Vol. 6, Issue 3, 2019 · pp. 16–25 Read article
-
A Comparative Study to Assess the Attitude Regarding Women Empowerment among Adult Population in Selected Area of Ambala, Haryana
Abstract: If women in the developing world do not have equal rights, they will not have equal health. It is as simple as that; the empowerment of women is not a politically correct cliché [1], but a living, essential goal for everyone. Women perform 66% of the world’s work, and produce 50% of the food, yet earn only 10% of the income and own 1% of the property. Whether the issue …
Published in Research and Reviews: A Journal of Medicine · Vol. 6, Issue 2, 2016 · pp. 15–20 Read article
-
Study of Load Frequency Control
Abstract: This paper is an attempt to study the control of active and reactive power in order to keep the system in the steady state. In addition, simple models of the essential components used in control system are analyzed. The objective of the control strategy is to generate and deliver power in an interconnected system as economically and reliably as possible while marinating the voltage and frequency within permissible limits. These …
Published in Trends in Electrical Engineering · Vol. 6, Issue 2, 2016 · pp. 73–79 Read article
-
A Study on the Influence of Cashew and Pawpaw Leaf on Soil Density Treatment of Contaminated Swampy and Clay Soils
Abstract: Soil density is a key parameter in assessing soil health and structure, often employed as a potential index in bioremediation studies. This study investigates the impact of bioremediation treatments using Cashew Leaf (Anacardium occidentale) and Pawpaw Leaf (Carica papaya) on the density of swampy and clay soils over time. The results show that both treatments, in varying quantities, influence the soil's density by reducing the post-contamination density to levels closer …
Published in International Journal of Advance in Molecular Engineering · Vol. 3, Issue 2, 2025 · pp. 1–9 Read article