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808 articles for “Principles”
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Adsorption, Process Technology with Catalysis
Abstract: Surface of solids assumes a significant part in numerous physical and synthetic peculiarities. There are two principle purposes behind this exceptional job. First and foremost, the outer layer of a substance interfaces first with its environmental factors. Furthermore, the surface particles are in an alternate state as looked at to the atoms in the inside of the strong. The surface atoms interface all the more promptly with different substances which …
Published in Journal of Catalyst & Catalysis · Vol. 8, Issue 3, 2021 · pp. 7–14 Read article
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Improved Gasoline Yield from Fluid Catalytic Cracker Riser Reactor
Abstract: The study focused on improvement and conversion of vacuum gas oil as feedstock to fluid catalytic cracker riser reactor with enhanced yield of gasoline, liquefied petroleum gas and fuel gas products and low yield of coke as undesired product. Thus, steady state performance models were developed for riser reactor as a plug flow reactor using five lump kinetic scheme to study the cracking operations. Models were developed for the riser …
Published in Journal of Catalyst & Catalysis · Vol. 9, Issue 3, 2022 · pp. 1–14 Read article
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Heterogeneous Catalysis in Industrial Applications: A Review
Abstract: In many industrial processes, heterogeneous catalysis is essential because it improves reaction speeds and selectivity and makes catalyst recovery and reuse possible. This review explores the fundamental principles and diverse applications of heterogeneous catalysis in industry, with a focus on its economic and environmental benefits. We examine the structure and function of various catalysts, including metals, oxides, and zeolites, and their application in key industrial processes such as petrochemical refining, …
Published in Journal of Catalyst & Catalysis · Vol. 10, Issue 3, 2023 · pp. 17–23 Read article
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Unveiling Sustainable Solutions: The Quest for Green Construction Practices
Abstract: The construction industry in India has been experiencing significant growth, contributing a substantial portion to the country's GDP. It encompasses residential, commercial, industrial, and infrastructure projects. The construction industry abroad varies greatly depending on the region and country. Developed countries like the United States, European nations, and Japan have mature construction sectors, focusing on infrastructure maintenance, renovations, and sustainable building practices. Emerging economies in Asia, Africa, and Latin America are …
Published in Journal of Catalyst & Catalysis · Vol. 10, Issue 2, 2023 · pp. 33–50 Read article
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FACTORS INFLUENCING SUSTAINABILITY DURING THE CONSTRUCTION PHASE OF THE SMART CITY PROJECTS
Abstract: Nowadays, urban cities of developing countries mainly India, are facing rapid urbanization that has been resulted in issues such as, gap in demand and supply of infrastructure services and utilities, increased pollution, traffic congestions, reduction in land cover, etc., thus affecting the ecology negatively in wider extent. Smart cities are recognized as a sustainable world wide solution to the above mentioned urban issues, which emerges as a means to achieve …
Published in Journal of Construction Engineering, Technology & Management · Vol. 8, Issue 2, 2018 · pp. 14–27 Read article
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DESIGN MANAGEMENT FOR EPC CONTRACT
Abstract: Design management can be defined as the effective management of design process, design planning, cost-effective design, allocation of design liability, and co-ordination of project participants during design process. The fundamental principle of design management is to provide a co-ordinated design on time by fulfilling client’s requirement. Co-ordination among designer, client and contractor is a widespread problem in the construction industry.Significant advances have made for EPC contract; but only a few …
Published in Journal of Construction Engineering, Technology & Management · Vol. 9, Issue 1, 2019 · pp. 21–25 Read article
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Preparing a Blueprint for Modification and Development of the Reality of the Construction Contracts in Iraq
Abstract: Inthe field of contractingthe contract is at the topof the commitmentsourcestothe twopartiesnamely;contractor andemployer, so itis necessary to know thematter related toa contractbecause the originalbase is that “the contract is a law ofcontractors”.The stateis able toprotect the public interest,accounting and punish the abusers, andthen cooperatingbetweenparties ofthe contract andfacilitating the implementation ofconstructioncontracts speeding indecision-makingregarding difficulties and problemsin thejusticeand fairness that become acceptable policywhich should be encouragedto workand protect itwithin the limitsprescribedlegally, because …
Published in Journal of Construction Engineering, Technology & Management · Vol. 6, Issue 2, 2016 · pp. 94–115 Read article
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A Brief Appraisal and Analysis of Existing Practices in the Contracts of Infrastructure Projects of Indian Railways
Abstract: Railways occupy a prominent position in the infrastructure of India. Existing practices in the project management and infrastructure development with special reference to the Indian railways have been brought out with some details in this paper. Tendering phase is very important in the project construction and maintenance of major railway related works. The principles and practices in the public procurement of projects are examined and suitable improvements in the bidding …
Published in Journal of Construction Engineering, Technology & Management · Vol. 6, Issue 1, 2016 · pp. 14–23 Read article
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A Study on Construction Labour Productivity Parameters in India
Abstract: Construction industry (CI) is one of the major pillars in economy in any country, be it developed or a developing one. CI plays a pivotal role in the capital investment. Construction labour productivity (CLP) has pivotal role to ensure CI contributes to economic growth. It is difficult to improve or even measure CLP as there is a limited comparable input and output. Normally, even the slightest improvement in CLP level …
Published in Journal of Construction Engineering, Technology & Management · Vol. 6, Issue 1, 2016 · pp. 45–52 Read article
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Structural Analysis and Design of Prestressed Concrete Subway
Abstract: Subway is an underground tube which is used to carry underground roadway and railway systems within urban and suburban areas. To reduce the traffic volume above the ground underground Subway is used to connects many busy places through a common route. Many Metropolitan Cities in India are on the verge of getting saturated due to Urbanization therefore the Planning and Construction of such underground Subway is very much important in …
Published in Journal of Construction Engineering, Technology & Management · Vol. 11, Issue 3, 2021 · pp. 27–35 Read article
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Towards a Sustainable City: Evaluating a Dynamic Model for Urban Operation
Abstract: This paper examines the theory of the polycentric city, building on the transformation of urban operations that occurred during the pandemic. It investigates how cities and their residents adapted to measures and precautions during the pandemic, exploring the potential for a new dynamic model. This model incorporates an updated polycentric theory, integrates new technology, and adheres to sustainable development principles, with the aim of creating a sustainable, climate-friendly, and user-centric …
Published in Journal of Construction Engineering, Technology & Management · Vol. 13, Issue 3, 2023 · pp. 24–36 Read article
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Design and Modeling of High Speed Homopolar Inductor Alternator
Abstract: Homopolar inductor alternator (HIA) is basically used for high speed application because of its expected high reliability in severe environments, high efficiency and capacity of rotating at high speed. Even though homopolar inductor alternator is a synchronous generator, the asymmetric structure of alternator makes its theoretical principle ambiguous and design of alternator is difficult. So investigation on this alternator is very important. In this study, design and modelling of six …
Published in Journal of Control & Instrumentation · Vol. 9, Issue 3, 2018 · pp. 30–36 Read article
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Speed Estimator for Sensorless Field-Oriented Control Induction Motor Drive Using Intelligent Neural Networks
Abstract: This paper presents a novel approach to the field-oriented control (FOC) of induction motor drives. It discusses the introduction of artificial neural networks (ANNs) for decoupling control of induction motors using FOC principles. The neural network has been then designed and trained online by employing a back propagation network (BPN) algorithm. The estimator was designed and simulated in Matlab/Simulink. Simulation result shows a good performance of speed estimator. Simulation results …
Published in Journal of Control & Instrumentation · Vol. 6, Issue 3, 2015 · pp. 42–49 Read article
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Cold Light Source for Endoscopy using AVR Microcontroller
Abstract: An endoscopy involves the procedure of examining internal organs of the human body using endoscope. Presently, during endoscopy halogentype or xenon type light sources are used. The main drawback of these sources is the heat dissipated by them effects the sensor data. Due to high temperature in the surrounding environment, the video tube or optical fiber used to transfer data may be damaged. Moreover if the lamp turns off during …
Published in Journal of Control & Instrumentation · Vol. 5, Issue 1, 2014 · pp. 5–10 Read article
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Stress and Deformation Analysis of Rotating Cylindrical Pressure Vessel of Functionally Graded Material Modeled by Mori-Tanaka Scheme
Abstract: The present study deals with the linear elastic analysis of rotating cylindrical pressure vessels. The vessels are made up of one directional functionally graded material (FGM), in which mechanical and physical properties are varying along the radial direction. The analysis is carried out using finite element method which is based on the principle of stationary total potential (PSTP). Material properties are graded according to the Mori-Tanaka distribution law and ceramic-metal …
Published in Journal of Experimental & Applied Mechanics · Vol. 8, Issue 3, 2017 · pp. 1–7 Read article
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An Investigation of Stress and Deformation States of Rotating Functionally Graded Spherical Pressure Vessels
Abstract: The present study deals with the analysis of rotating spherical pressure vessels made of functionally graded materials (FGMs). Material properties are graded along the radial direction, which is achieved by varying volume fractions of the constituting materials according to Mori-Tanaka scheme. Shells are subjected to hydrostatic internal pressure and have free boundary condition at the outer surface. Governing equations are derived using principle of stationary total potential. The effects of …
Published in Journal of Experimental & Applied Mechanics · Vol. 8, Issue 3, 2017 · pp. 19–27 Read article
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Mathematical Modelling of Electromagnetic Induction Coil gun for Non-Lethal Self Defence Applications
Abstract: To take someone's life is often termed as the biggest slanders spiritually one can commit be it while protecting one's self from endangering acts. Non-lethal weapons provide us with an opportunity to come over this dilemma thereby providing a numbing effect to save from devastating consequences. The objective of this paper is to present a non-lethal portable induction coilgun that can potentially address security concerns. To serve the respect and …
Published in Journal of Experimental & Applied Mechanics · Vol. 9, Issue 2, 2018 · pp. 66–73 Read article
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On the Optimisation of fundamental frequency to determine the Optimal Design of Bracing System for A Three Storey One Bay Two Dimensional Planar Structure
Abstract: Bracing systems are useful to improve the resistance of multi-storey buildings subjected to wind forces acting in lateral direction on the structure. The main focus of this paper is to find the optimal design of the bracing for a three storey one bay two dimensional planar structure. The eigen frequency of the structure is maximized to determine the relative density using a stress based criteria of each element for every …
Published in Journal of Experimental & Applied Mechanics · Vol. 9, Issue 3, 2018 · pp. 55–59 Read article
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Stress Analysis of Two-Dimensional Functionally Graded Thick Rotating Disks by Element Based Material Grading
Abstract: The present study reports the stress and deformation analysis of thick rotating disks made of two-dimensional functionally graded materials (FGMs). The analysis is carried out using element based gradation of material properties in radial and axial direction over the discretized domain. Material properties are distributed according to power law distribution and the governing equations are derived using principle of stationary total potential (PSTP). The resulting deformation and stresses are evaluated …
Published in Journal of Experimental & Applied Mechanics · Vol. 8, Issue 1, 2017 · pp. 28–36 Read article
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Modelling of An Electric Tractor Powertrain using MATLAB/Simulink
Abstract: Lithium-ion battery pack technology is the current trend in the automotive industry. For this study, the authors have selected NMC 18650 lithium-ion cells to design a battery pack for electric tractors and simulating the electric tractor powertrain model to gauge and size the battery pack configuration parameters. The tractor parameters have been selected by comparing with some Indian and Japanese electric tractors. The simulation has been carried out using MATLAB/Simulink …
Published in Journal of Experimental & Applied Mechanics · Vol. 12, Issue 2, 2021 · pp. 1–14 Read article