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871 articles for “Calculations”
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A New Model for Calculating Customer Lifetime Value on Monetary, Interpurchase Time and Retention
Abstract: Customer lifetime value(CLV) is an important an index to help company measure its customer value and allocate its marketing resource efficiency. CLV model bases on economic concept to calculate customer value with their purchase behavior.This paper construct a new model for calculating customer lifetime value on monetary, interpurchase time and retention. The empirical data of a credit card company is used to estimate parameters and compare the predicting results with …
Published in Journal of Production Research & Management · Vol. 11, Issue 2, 2021 · pp. 1–8 Read article
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Structural, Electronic and Optical Properties of ZnO Material Using First Principle Calculation
Abstract: Structural, electronic and optical properties have been determined by using first principle calculation for ZnO material. In present study, full potential linearized augmented plane wave method has been selected with generalised gradient approximation executed in WIEN2k. Structure of ZnO material stabilises in the Wurtzite form of hexagonal closed packed crystal with lattice constant a=3.289Å, c= 5.307Å. Density of states and band structure diagram of ZnO material shows semiconductor nature with …
Published in Journal of Polymer & Composites · Vol. 11, Issue 5, 2023 · pp. 27–34 Read article
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Optimization of Pesticide Requirement Calculations for IoT-Operated Hexacopter Delivery Systems
Abstract: The integration of Internet of Things (IoT) technology into precision agriculture has transformed pesticide application strategies, enabling resource-efficient and environmentally sustainable practices. This study presents a computational methodology for optimizing pesticide requirements in an IoT-operated hexacopter system, designed for dynamic, data-driven pesticide delivery. Leveraging a fusion of real-time telemetric data from onboard LiDAR, multispectral imaging sensors, and environmental monitoring modules, the system employs predictive analytics and edge computing to calculate …
Published in International Journal on Drones · Vol. 2, Issue 1, 2026 · pp. 08–14 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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Lambda Doubling Calculation of Carbon Monoxide C12O16 Molecule
Abstract: The theoretical emission spectrum of C12O16 molecule, calculation of lambda doubling, the relation between wavenumbers R(J), Q(J), P(J) and rotational state energies F(J), F(J + 1) with rotational quantum number J respectively have been investigated for A1
Published in Emerging Trends in Chemical Engineering · Vol. 2, Issue 2, 2015 · pp. 25–31 Read article
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Switching Loss Calculation of Power MOSFET using the Estimation Technique
Abstract: An accurate analytical model is very important to measure the switching losses of PowerMOSFET. The perfect estimation of Power MOSFET switching loss is very difficult to predictthe efficiency of the power electronics circuit. This paper investigates the basic internalphysics of the Power MOSFET device and proposed the best possible analytical model tocalculate the power loss. The pre-existing widely accepted power loss calculation method isfound to be useless and inaccurate. In …
Published in Journal of VLSI Design Tools and Technology · Vol. 10, Issue 1, 2020 · pp. 37–44 Read article
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Weight Calculation of Forging Die Design for Gear Blank
Abstract: Forging is one of the most adopted manufacturing processes, in which raw material is plastically deformed in to desired shape and size of component. The majority of the crucial load bearing structure component as well as safety critical items are processed through forging process. This is mainly due to the strength and dimensional accuracy of component can be achieved in forging process. Faster production of complex shapes with the less …
Published in Trends in Mechanical Engineering & Technology · Vol. 7, Issue 3, 2017 · pp. 53–58 Read article
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Precipitable Water for Human Consumption in Rural Areas: Calculation Method and Engineering Design
Abstract: This work describes a methodological process to estimate the precipitable water for human consumption as a function of meteorological parameters like ambient and dew point temperature, water vapor and ambient pressure, and relative humidity. The paper uses empirical correlations to determine the most accurate procedure for atmospheric rainwater, resulting in a simple relation between precipitable water and dew point temperature as the highest accurate one. The study shows the dew …
Published in Journal of Water Resource Engineering and Management · Vol. 11, Issue 3, 2024 · pp. 41–57 Read article
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AI-Driven Exam Grading, Percentile Calculation, and Plagiarism Detection System for Educational Integrity
Abstract: The influence of artificial intelligence (AI) on academic evaluation has become increasingly significant, particularly in areas such as automated grading, large-scale content analysis, and plagiarism detection. These technologies provide educators with rapid processing, consistent scoring, and timely feedback that can support both teaching and learning. However, alongside these advantages, serious concerns have emerged regarding the reliability and fairness of AI-driven assessments. The growing presence of AI-generated content has further complicated …
Published in Current Trends in Information Technology · Vol. 16, Issue 1, 2025 · pp. 07–12 Read article
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Design Calculations and Parametric Analysis of a Membrane Permeator for Hydrogen-Helium Separation
Abstract: Palladium or palladium alloy-based membrane permeators have been proposed to be used for the separation of hydrogen isotopes from helium in fusion energy plants on account of the very high selectivity for hydrogen exhibited by these membranes. In this work, the preliminary design and parametric analysis of a single stage membrane permeator having different flow patterns have been carried out and the effect of various parameters on the membrane area …
Published in Emerging Trends in Chemical Engineering · Vol. 2, Issue 1, 2015 · pp. 21–34 Read article
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Comparison of Vegetation and Water Indices Calculated on IRS LISS-3 and IRS-P6 AWiFS Data
Abstract: Remote sensing technologies provide stereo images which allow topographic mapping and the functionality gives not only static display but also analytical process. Vegetation indices and water indices have been proposed over last decades as the most suitable vegetation and water indices for a given remote sensing application. In this research study, the suitability and results show these indices (SVI, NDVI, SWI and NDWI) can apply on LISS-3 and Awifs, more …
Published in Journal of Geotechnical Engineering · Vol. 1, Issue 1, 2014 · pp. 10–14 Read article
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Survey on Analysis and Simulation of Permanent Magnet Synchronous Motor (PMSM) under Vibration Effect using Analytical Magnetic Field Calculations
Abstract: In several application domains, induction motor drives have been steadily being replaced in recent years by permanent magnet synchronous motor (PMSM) drives. Due to the compactness, efficiency, resilience, reliability, and shape adaption to the working environment of PM motors, this is starting to become a trend. In high performance applications demanding quieter operation, permanent magnet synchronous motors are widely used. Instead of torque ripples and cogging torque, electromagnetic forces are …
Published in Journal of Microwave Engineering and Technologies · Vol. 9, Issue 2, 2022 · pp. 26–33 Read article
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Calculation Improvement of the Clay Content in the Hydrocarbon Formation Rocks
Abstract: Natural radioactivity of reservoir rocks of oil and gas in East Baghdad field is due to not only their content of clay material, but also the existence of uranium located in the skeleton of rocks. In connection with this, for the shale content determination of reservoir rocks, it is necessary to exclude the uranium contribution from the overall intensity of the gamma radiation. The paper presents the results of a …
Published in Journal of Petroleum Engineering & Technology · Vol. 7, Issue 1, 2017 · pp. 1–3 Read article
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Calculation Method for Determining the Gas Flow Rate Needed for Liquid Removal from the Bottom of the Wellbore
Abstract: As a result of flooding and accumulations of liquid at the bottomholes, the operating conditions of gas wells become complicated, so that they end up self-squeezing and losing of gas production. A method is proposed for determining the technological parameters of operation of the gas wells with the purpose of removing liquid from the bottom of the wells. Data from the gas dynamics and special studies were used to develop …
Published in Journal of Petroleum Engineering & Technology · Vol. 11, Issue 2, 2021 · pp. 1–8 Read article
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Transmission Charge Calculation of Power System
Abstract: In traditional power system, industry vertically integrated system (VIS) exists. But nowadays the vertical utility is being converted into horizontal integrated utility. This is the deregulation of power system. This system is divided into three parts: Transmission, generation and distribution. The revenue of the generation comes from the selling the power to the transmission and distribution. Similarly, the revenue of DISCO comes from commercial, industrials and domestic consumers. But in …
Published in Trends in Electrical Engineering · Vol. 6, Issue 2, 2016 · pp. 58–63 Read article
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Calculating SAR Distribution and RF Electromagnetic Field Due To MRI Coil at Human Model
Abstract: AbstractMRI (magnetic resonance imaging) is an effective method for diagnosis of diseases. The MRI system is made of some important units including RF (radio frequency) devices [1]. The RF coil is one of the important parts in the RF unit. During the imaging, the RF coil radiates EM (electromagnetic) pulse to the human body and in response receives the NMR (nuclear magnetic resonance) signals emitted from the nuclei, which constitutes …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 2, 2013 · pp. 1–8 Read article
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Improving Efficiency of the Focused Web Crawler by Link Score Calculation
Abstract: AbstractThe overwhelming size of the Web enables continuous support and recurring update of Web based information retrieval systems. The Crawler can narrow down the entire process to allow the hyperlinks in Web pages to download a part view of the Web. Meanwhile few systems absolutely depend on crawlers that exclusively crawls the web, and extract the topic specific collections. A focused crawler has the tendency to accumulate particular topics and …
Published in Journal of Computer Technology & Applications · Vol. 4, Issue 1, 2013 · pp. 16–22 Read article
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Epidemiology of Urolithiasis
Abstract: Purpose: Stone formation commonly affects the urinary system. The purpose of this study was to study the prevalence of stones in the renal system in both the sexes, age groups affected, side incidence and the site of stone. Materials and Methods: A total of 155 patients were included in the study who underwent ultrasonography studies to detect the side, site and size of the stone in the urinary system. Results: …
Published in Research and Reviews : Journal of Surgery · Vol. 8, Issue 2, 2019 · pp. 8–11 Read article
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Unani Opinion on Nephrolithiasis (Hisat-e- kulyah) and its Management
Abstract: Nephrolithiasis is called Hisat-e-Kulyah in Unani system of medicine. Nephrolithiasis is a disease in which crystal aggregates are generally formed in the kidneys. It is one of the most common urinary tract abnormalities affecting approximately 15% of the population worldwide and approximately 2.3% of the population in India. Since historical times, Urolithiasis (Hisat-e-Bauliyah) or Hisat-e-Kulyah (Nephrolithiasis) has been treated by Unani doctors such as Hippocrates, Galen, Avicenna, Razi, Ibn- e-Zohr …
Published in Research & Reviews : A Journal of Unani, Siddha and Homeopathy · Vol. 9, Issue 3, 2022 · pp. 17–21 Read article
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Theoretical Study of Substituent Effects on Electronic Properties and Polarizability for (2, 5, 24, 27-Tetrahalogen Pentacene) Molecule
Abstract: DFT and semi empirical methods have been carried out studying (2, 5, 24, 27 tetrahalogen pentacen) molecules using the B3LYP functional and the 6-311G (d, p) basis set and AM1 model. Total energy, electronic properties such as; ionization potential, electron affinity, energy gap, dipole moment, polarizability and electronic potential. The calculated ionization potential (6.126 eV) and electron affinity (1.417 eV) of this molecule is in a good agreement with experimental …
Published in Emerging Trends in Chemical Engineering · Vol. 3, Issue 1, 2016 · pp. 1–8 Read article