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1887 articles for “Disc” (ranking capped at the first 2,000 matches — narrow the search to see the rest)
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An Overview of Poroperm Relationship in the Recognition of Heterogeneity in Petroleum Reservoirs
Abstract: Reservoir heterogeneity is comprehended on different scales based on vertical and lateral variations in the hydrocarbon bearing sedimentary sequences. The two depositional systems, Sand-shale and carbonate with complex patterns based on properties of rocks help in deciding quality of rocks, the most important being the porosity permeability relationship. The intricate relationship of these two parameters if discussed in connection with sampling depth gives better understanding of variations in vertical direction …
Published in Journal of Petroleum Engineering & Technology · Vol. 11, Issue 1, 2021 · pp. 17–42 Read article
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Liquefied Oxygen Fracturing: A Simulative Approach
Abstract: The entire project is a work on the simulation of fracture design on a new potential fracturing fluid liquefied oxygen. The purpose of this study was to conduct a comparative study between hydraulic fracturing and cryogenic fracturing (liquefied oxygen) for the same reservoir having same properties to generate potential information on intrusion of fracturing fluid, pumping criteria, final stage pump pressure, required pumping time for both the fluids water as …
Published in Journal of Petroleum Engineering & Technology · Vol. 11, Issue 1, 2021 · pp. 43–51 Read article
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Design of a Process Plant for Dimethyl Ether Synthesis from Syngas Using Direct Method
Abstract: The search for alternative renewable and less polluting energy sources has gained prominence thus, there is an increasing interest in the use of Dimethyl Ether (DME) as a clean alternative fuel and raw material in the chemical industry. The simulation of a plant for the production of Dimethyl Ether from Syngas using direct synthesis method has been carried out in this work. The simulation was done using ASPEN HYSYS software. …
Published in Journal of Petroleum Engineering & Technology · Vol. 13, Issue 1, 2023 · pp. 44–59 Read article
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A Model of Bidding in Rotating Saving Credit Associations
Abstract: The paper analyzes bidding behavior in discount bidding Roscas under the assumption of risk neutrality. Roscas are group based revolving financial schemes. In discount bidding Roscas, individuals bid for a lumpsum. We find that bids submitted by members in equilibrium are increasing in the returns or opportunities for investment. Further, members submit lower bids when credit is available outside Rosca at expensive rates. A bidding Rosca is efficient as an …
Published in Journal of Production Research & Management · Vol. 7, Issue 1, 2017 · pp. 11–15 Read article
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Parallel Conwip for a High-mix Multi-stage Production System with the entrance of rework
Abstract: In a complex production environment, more than one type of pull systems is often used to regulate the processesof different products. In literature, performance studies appertaining to multiple pull systems co-existed in aproduction environment are rare. The present paper evaluates the performances of parallel CONWIP (PC)systems in a high-mix production system with the entrance of rework. The production comprises three stages ofshared-machine facilities. Reject parts produced by the first stage …
Published in Journal of Production Research & Management · Vol. 1, Issue 1-2-3, 2011 · pp. 21–44 Read article
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Progress of Graphene/Silicon Solar Cells-Present Status & Future Prospect
Abstract: The ever-increasing demand for next-generation high efficiency low cost solar cell has triggered interest to search for new materials which are easily available, environmentally benign as well as cost-effective. In this context, graphene has attracted tremendous importance due to its outstanding optical, electrical and mechanical properties, for possible application in future graphene/silicon Schottky and heterojunction solar cells. Significant progress has been noted as the power conversion efficiency of such cells …
Published in Journal of Semiconductor Devices and Circuits · Vol. 7, Issue 3, 2020 · pp. 19–29 Read article
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DC and RF Analysis on Specific Quantum-Well Heterostructures
Abstract: Polarization-graded AlGaN back-barrier nano-layer is introduced in high electron mobility transistor (HEMT) structure to have an improved drain current characteristics and better radio-frequency performance, using two-dimensional drift-diffusion simulation by SILVACO-ATLAS physical simulator. In this work, the AlGaN/AlN/GaN/AlGaN/GaN double heterojunction HEMT structure is optimised with graded back barrier layer to study the DC and RF performances. Investigation of this structure with graded back barrier layer is the novelty of this work. …
Published in Journal of Semiconductor Devices and Circuits · Vol. 9, Issue 1, 2022 · pp. 1–13 Read article
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A Review of Thermal Spray Coatings
Abstract: Thermal spray coatings are applied on surface of metals to improve their functional properties. Thermal spray technique offers the possibility to deposit wide range of ceramic coatings on metallic components. In the present paper we discuss the various types of coatings deposited using thermal spray techniques. The effect of rare earth metal oxides on microstructure and mechanical properties of the coatings are being discussed.
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 7, Issue 2, 2020 · pp. 1–6 Read article
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A Brief Overview of the Removal of Fluoride and Chromium Using Polymer Adsorbents
Abstract: Water tainted with heavy metals are the serious worldwide issues face today because of economic and industrial growth. Even at trace amounts, hexavalent chromium is a significant metal ion pollutant that is highly harmful to humans, animals, plants, and microbes. There are several methods for purifying water, but adsorption is one of the most straightforward, practical, and cost-effective approaches. Chromium is one such significant metal that may be released by …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 10, Issue 2, 2023 · pp. 1–14 Read article
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Autonomous Vehicles: The Future of Transportation
Abstract: AbstractAutonomous vehicles are anticipated to be the future of automobile transportation which is efficient safe and cost effective, several automobile companies have put their foot in the vast segment of autonomous vehicles and are currently working towards manufacturing driverless vehicles. From Internet giant Google Inc. to major Automobile manufacturing companies like BMW, Mercedes, Toyota, Tesla motors and world’s largest Taxi firm Uber, all major and minor companies are putting a …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 7, Issue 1, 2020 · pp. 8–13 Read article
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An Overview of the Design and Optimization of Antennas Employing Machine Learning Algorithms and Methodologies
Abstract: This paper offers a comprehensive exploration of the integration of machine learning (ML) techniques in antenna design and optimization, reflecting the burgeoning interest and potential impact of ML in emerging technologies. The first segment conducts a detailed literature survey, elucidating conventional computational electromagnetic and numerical methods preceding an in-depth discussion on the core facets of ML, encompassing diverse learning categories and frameworks. Additionally, it provides a mathematical exposition on regression …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 10, Issue 3, 2023 · pp. 1–12 Read article
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Design of Active Filter using CMOS based IInd Generation Current Conveyor in Current Mode
Abstract: Traditional design techniques used in VLSI are in voltage mode, but these have drawbacks like low bandwidth, non-linearity and less gain. Current conveyors act similar to operational amplifiers but are advantageous over older VLSI design techniques because of high bandwidth-gain product, reduced power consumption etc. This paper consists of two parts: circuit diagram of current conveyor (which is a three terminal analog device) is discussed first and its working is …
Published in Journal of VLSI Design Tools and Technology · Vol. 9, Issue 1, 2019 · pp. 15–21 Read article
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Analysis of Three Phase AC-DC Front End Converter with Vector Control
Abstract: The revolution in power electronics has opened in last few years widespread use of power converters of different power rating from few Watts to Mega-Watts. 3 phase AC-DC converters (Controlled rectifier) are most widely used power converters as the distributed electric power is AC supply, while the applications based on DC supply as well as variable frequency AC supply, need conversion of AC supply into DC supply. Large current harmonics …
Published in Journal of VLSI Design Tools and Technology · Vol. 11, Issue 3, 2021 · pp. 19–30 Read article
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PHYSIOCHEMICAL ANALYSIS OF WASTE WATER COLLECTED FROM THREE MAJOR RIVERS IN MONSOON SEASON FROM PALAKKAD
Abstract: Various waste management techniques were implemented in India have failed due to various reasons, the major reasons are industrial growth and urbanization. The pollution impacts on aquatic communities can be observed directly to the industrialized centres, which discharges series of chemical pollutants to effluent systems.. These wastes mainly encompasses a broad range of contaminants such as petroleum hydrocarbons, chlorinated hydrocarbons and heavy metals, various acids, alkalis, dyes and other chemicals …
Published in Journal of Water Resource Engineering and Management · Vol. 5, Issue 2, 2018 · pp. 51–55 Read article
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A Feasibility Analysis on New Drainage Channel to Control Flooding in Southwest Chennai Using Hydraulic Model
Abstract: Flood Management plays a major role in minimizing the socio-economic loss in a watershed. In the urban context, flood is due to uncontrolled settlements of migrated population along the length of surplus carrying channels. This study focuses on feasibility analysis of existing drainage channel and proposed drainage channel network as structural management measure for a watershed, proposed by public work department of Chennai to reduce the impact of flood. In …
Published in Journal of Water Resource Engineering and Management · Vol. 2, Issue 1, 2015 · pp. 1–7 Read article
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Design of A Spillway: A Case Study
Abstract: A hydraulic structure constructed to discharge surplus water from the reservoir into the river on the downstream side without endangering the safety of the dam is known as Spillway. Spillway is very important structure in any dam project. Many dams have failed because of incorrect design of spillway. Spillway is most vulnerable part of dam. Proper attention has to be given to the design and construction of spillway. Spillway can …
Published in Journal of Water Resource Engineering and Management · Vol. 2, Issue 2, 2015 · pp. 19–28 Read article
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Rainfall Runoff Modeling Using SCS-CN Method: A GIS Based Case Study of Pawana Watershed
Abstract: In a country over 125 million, we are proudly an agricultural based economy, wherein 51% of population is indulged in any business related to somehow with agriculture. Of course, we still are in a developing stage as far as methodologies or their implementation is concerned. But surely somewhere we have started focusing on modern techniques and strategies to improve pattern, productivity, profit and all. The two vital natural resources required …
Published in Journal of Water Resource Engineering and Management · Vol. 3, Issue 3, 2016 · pp. 50–58 Read article
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A Study on Earthquake Resistance Building Construction
Abstract: Earthquake is one of the largest and greatest dangerous hazards of the property and life in the world. Due to its quick and sudden reaction, the buildings, highways, bridges, tunnels etc., are damaged very fast and also causes so many fatal and nonfatal injuries of people. For the safety purpose, many precautions during the design and construction time were considered in the structures. In this paper, we have done a …
Published in Recent Trends in Civil Engineering & Technology · Vol. 6, Issue 3, 2016 · pp. 1–5 Read article
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A Remote Sensing Approach for Monitoring Seasonal Variations in the Water Quality of Lake Guaiba, Southern Brazil
Abstract: Freshwater resources in the tropics are subjected to high rate of pollution due to algal blooms during the summer and due to particulate and organic waste discharge from urban areas during spring. Landsat TM images were used to calculate biochemical oxygen demand and turbidity of Lake Guaiba in Southern Brazil during 2010–2011. The results obtained were compared with the values derived from a yearlong sampling data which were analyzed in …
Published in Recent Trends in Civil Engineering & Technology · Vol. 4, Issue 1, 2014 · pp. 1–10 Read article
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Bridge Scour by HEC-RAS Model: A Case Study over Ganga Bridge
Abstract: Lacey’s equation is often used to find out the scour depth in rivers in India. Lacey’s regime formula (1930) was developed on the basis of limited field data from irrigation canals in Punjab Province having discharge ranges from 0.70 to 173 m3/s. The total scour at a highway crossing is comprised of three mechanisms: long-term aggradation-degradation, contraction of reach, and local scours at piers and abutments. In the present study, …
Published in Recent Trends in Civil Engineering & Technology · Vol. 2, Issue 1-3, 2012 · pp. 1–8 Read article