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449 articles for “percolation theory”
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Listening to Colonial Disruption: Sound, Silence, and Cultural Memory in the Works of Chinua Achebe
Abstract: This article examines the significance of sound and silence in the fiction of Chinua Achebe, arguing that auditory experience functions as a crucial medium through which cultural memory, identity, and resistance are represented. Although Achebe’s novels have been extensively studied in relation to colonialism, nationalism, and language politics, comparatively little attention has been paid to their acoustic dimensions. Drawing on postcolonial theory, oral tradition studies, and cultural memory studies, this …
Published in Emerging Trends in Languages · Vol. 3, Issue 2, 2026 · pp. 10–15 Read article
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Crystal Defects and Their Characterization in Modern Materials Science
Abstract: The physical and chemical properties of crystalline solids are fundamentally dictated by deviations from structural perfection, known as crystal defects. From the point-scale vacancies that drive diffusion to the planar boundaries that determine mechanical strength, defects serve as the primary "tuning knobs" in material design. This review provides a comprehensive examination of point, line, and planar defects, exploring their formation energetics and their role in plastic deformation via crystallographic slip. …
Published in International Journal of Crystalline Materials · Vol. 3, Issue 1, 2026 · pp. 15–19 Read article
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An Advanced Wireless Network Security
Abstract: AbstractThis paper focuses on an application of Logarithmic-Probability Theory (LPT) over the Wireless Network Security (WNS). The compact principle of LPT generalizes to the improvement of the security of the wireless network. The capacity of WNS is studied in this paper also via discrete probability distribution function. The channels are established to set the new system of WNS. To communicate with efficiency by source coding is an objective of this …
Published in Current Trends in Signal Processing · Vol. 8, Issue 3, 2018 · pp. 18–23 Read article
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Blind Separation of Instantaneous Mixtures of Sources Using Stochastic Calculus
Abstract: Stochastic calculus methods are used to estimate the Nonstationary components of a linear mixture. Each component in the mixture is assumed to follow a stochastic differential equation with some unknown parameters. The estimation of the stochastic process parameters and the estimation of the unknown amplitudes of the mixture matrix, through Girsanov theory, will generate a stochastic equation for each unknown process. Several examples are given, and a comparison to existing …
Published in Current Trends in Signal Processing · Vol. 2, Issue 1-3, 2012 · pp. 26–48 Read article
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Numerical Analysis of Cyclone Separator
Abstract: The fluid dynamics of a three-dimensional cyclone separator were studied computationally. Commercial CFD software package, Fluent was used for the simulation. A multiphase Eulerian-Eulerian model incorporating the kinetic theory of granular flow (KTGF) was applied for simulating the air-solid movement. Momentum exchange coefficients were calculated using the Gidaspow drag functions. The kinetic energy fluctuation of mixture was characterized by varying the pressure values from 98Pa to 180Pa. Further computational and …
Published in Emerging Trends in Chemical Engineering · Vol. 5, Issue 1, 2018 · pp. 10–19 Read article
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DESIGN AND ADDITIVE MANUFACTURING OF SOFT CAPTURE DOCKING SYSTEM USING MR FLUID
Abstract: This paper emphasizes the development of Satellite docking system using Magnetorheological fluid. Docking is a mechanism where a space craft tends to adhere with another space craft or an international space station maneuvering on its own. Magnetorheological fluid is a smart material that is controllable using magnetic field. When a magnetic field is applied to Magnetorheological fluid its viscosity increases and becomes viscoelastic and the liquid state changes to solid …
Published in Emerging Trends in Chemical Engineering · Vol. 5, Issue 3, 2018 · pp. 14–23 Read article
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High Performance Liquid Chromatography: A short review
Abstract: High performance liquid chromatography ( HPLC) is an important qualitative and quantitative technique commonly used for estimating chemical , pharmaceutical and biological samples. It is the most versatile, reliable, safest and fastest chromatographic technique for the quality control of drug components. This article was prepared with the intention of reviewing various aspects of HPLC, such as theory, instrumentation, form, application and limitation.
Published in Emerging Trends in Chemical Engineering · Vol. 7, Issue 2, 2020 · pp. 20–26 Read article
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Dependency of pure liquid pool boiling heat transfer coefficient to bubble contact angle on roughened Brass heater in new model
Abstract: Heat transfer coefficient of nucleate pool boiling Nucleation is a basic part of phase transformations, which plays an important role in understanding and describing any phase change processes. For a boiling process, nucleation appears in the initial stage, and directly affects bubble formation and boiling intensity. According to the heterophase fluctuations which induce phase transition, the phase change has two main types. Classically, phase change caused by the fluctuation with …
Published in Emerging Trends in Chemical Engineering · Vol. 9, Issue 2, 2022 · pp. 29–36 Read article
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Parametric Study of Parabolic Trough Solar Collector System: A Review
Abstract: The detailed thermal analysis of a parabolic trough collector (PTC) was carried out to predict the thermal performance. The analysis is based on the established theory of PTC—the radiation absorption, heat loss from the collector, and temperature distribution on the plate. An analytical program, suitable for use on a digital computer is developed for the purpose of studying the hourly behavior of a solar collector. The exergy output is optimized …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 6, Issue 1, 2015 · pp. 46–50 Read article
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Reduction of Submerged Mark Defects in Injection Molding Method
Abstract: Because of overwhelming interest in plastic items, plastic businesses are developing in a speediest rate. Plastic infusion forming starts with shape making and in assembling of complex shapes. Ideal setting up of infusion forming process factors assumes an imperative part in controlling the nature of the infusion shaped items. It is all the most critical to control property abandons like sink marks. Sink marks are fundamentally a "planned in" issue …
Published in Journal of Catalyst & Catalysis · Vol. 5, Issue 2, 2018 · pp. 15–21 Read article
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Cost Objective Model for Construction Equipment Replacement Policies
Abstract: Most construction companies, particularly companies whose projects are primarily constructed with earthmoving equipment, depend heavily on their construction equipment fleets, which represent substantial locked capital investment and require acceptable utilization levels to recover expenses incurred and losses from this investment. The equipment, which possesses a finite physical and economic life, inevitably requires replacement, and equipment maintenance costs increase with the equipment life. Different methodologies are employed to establish the replacement …
Published in Journal of Construction Engineering, Technology & Management · Vol. 4, Issue 2, 2014 · pp. 1–13 Read article
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CONSTRUCTION SAFETY ANALYSIS OF INDIA: EXPLORING THE FEASIBILITY OF IMPLEMENTING INTERNET OF THINGS AS A PLATFORM TO PROTECT WORKER SAFETY & HEALTH
Abstract: Construction safety has become a major problem in India. Obtaining a proper solution is becoming a contemporary issue. In spite of spending money towards procuring personal protective equipment and incorporating other traditional safety measures, worker safety is not ensured in construction projects. According to an international report and national news and magazine reports, almost 48000 workers are subject to die due to fatal accidents taking place in India in which …
Published in Journal of Construction Engineering, Technology & Management · Vol. 13, Issue 1, 2023 · pp. 16–27 Read article
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Design And Implementation of Controllers for Quadruple Tank System
Abstract: Process industries have tightly integrated processes which are non-linear and have multiple manipulated and controlled variables. Level measurement plays an important role in many industries. In this paper, the level of the two lower tanks has to be controlled. Three different controllers have been designed and implemented by manipulating the motorised control valve. Conventional controllers may not perform well because of the variations in process dynamics and disturbances around them. …
Published in Journal of Control & Instrumentation · Vol. 9, Issue 1, 2018 · pp. 25–32 Read article
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Comparative Realization of 2DoF PID Controllers for Flow Process with Measurement Delay
Abstract: Two Degree-of-Freedom (2DoF) PID control techniques presented in this paper were developed based on optimal control theory and with the Anti-Integral Windup (AIW) scheme. The controllers were implemented for a laboratory flow process setup. First Order Process with Dead Time (FOPDT) models had been identified by step testing. The process responses showed a significant non-minimum phase dynamics exhibited for the specific step inputs applied. The measurement delay was considered as …
Published in Journal of Control & Instrumentation · Vol. 6, Issue 1, 2015 · pp. 1–8 Read article
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Study and Design of PID Controller and State Observer Technique for Inverted Pendulum
Abstract: The inverted pendulum is a classic problem in dynamics and control theory and is widely used as a benchmark for testing control algorithms, it is unstable without control. The process is nonlinear and unstable with one input signal and several output signals. It is hence obvious that feedback of the state of the pendulum is needed to stabilize the pendulum. The aim of the study is to stabilize the pendulum …
Published in Journal of Control & Instrumentation · Vol. 6, Issue 2, 2015 · pp. 13–18 Read article
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Extended Kalman Filter Application For Launch Vehicle Trajectory
Abstract: Real time applications have been implemented out of intuitive modeling but due to inefficient estimation techniques there were deviations in the results from expected processes. To avoid these deviations for better performance modeling, many mathematical state estimation methods are in use. This paper focuses on a state estimation method for monitoring and control of a real time system. The existing models for state estimation, as well as the challenges associated …
Published in Journal of Control & Instrumentation · Vol. 3, Issue 1-3, 2012 · pp. 41–49 Read article
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Numerical Methods of Optimization: A Review
Abstract: Optimization is an approach to finding the best result under given conditions. Several difficulties are occurred with the optimization of large scale problem. This paper is a review of numerical method of optimization techniques. Here discussed about different methods of numerical optimization for linear and nonlinear constrained and unconstrained system problem. Here we discussed about linear programing, integer programing, quadratic programing and nonlinear programing. The review is genera in nature, …
Published in Journal of Control & Instrumentation · Vol. 12, Issue 2, 2021 · pp. 19–25 Read article
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Design and Analysis of Taper Roller Bearing - A Review
Abstract: This paper reviews are detailed study of tapered roller bearings. The literature review is carried on Analysis of tapered roller bearings. In this paper the recent and past developments, theories on design of roller elements bearings are presented and analysis using FEM software for rolling element bearing. The paper mainly focuses on effect of the roller profiles due to bearing fatigue life. Various methodology used for experimental and fatigue life …
Published in Journal of Experimental & Applied Mechanics · Vol. 9, Issue 1, 2018 · pp. 69–74 Read article
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Non-Homogeneous Effect on Vibration of Visco-Elastic Rectangular Plate Having Parabolically Varying Thickness in Both Directions
Abstract: At present the vibration theory has become significant in every sphere of applied sciences. In the advance time, the plates of variable thickness are widely used in civil, aeronautical, mechanical, electronics and marine structures like jet engines designing, space crafts, gas turbines, nuclear power projects etc. The effect of variation of non-homogeneity on vibration of visco-elastic rectangular plate with parabolically varying thickness in both directions is presented in this paper. …
Published in Journal of Experimental & Applied Mechanics · Vol. 9, Issue 3, 2018 · pp. 31–45 Read article
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Optimization of Process Parameter in Electrical Discharge Machining
Abstract: This is the non-traditional machining process. The high surface finish of the material is required. More complex shape of material is required. Wire EDM is one of the nontraditional machining processes. Surface roughness and kerf width are of crucial in the field of machining processes. This paper uses the Grey relational theory and Taguchi optimization technique, in order to optimize the cutting parameters in Wire EDM for D3 steel material …
Published in Journal of Experimental & Applied Mechanics · Vol. 11, Issue 2, 2020 · pp. 4–10 Read article