Results 11 to 20 of about 145,828 (221)

A Cross-Check of the Reflectance Models to Be Used in Interpretation of Observations of Regolith-Like Surfaces

open access: yesFrontiers in Remote Sensing, 2022
Many current and proposed programs of satellite remote sensing of the Earth and other celestial bodies rely upon measurements of the intensity and polarization of light scattered by these bodies.
Victor P. Tishkovets, Elena V. Petrova
doaj   +1 more source

Local entropy maximization based image fusion for contrast enhancement of mammogram

open access: yesJournal of King Saud University: Computer and Information Sciences, 2021
Early detection of breast cancer can enhance the chances of survival. Contrast enhancement provides improved visual information that can be used for accurate segmentation of mammogram images.
Meenakshi Pawar, Sanjay Talbar
doaj   +1 more source

Investigation of heat transfer for cooling turbine disks with a non-Newtonian fluid flow using DRA

open access: yesCase Studies in Thermal Engineering, 2015
A non-Newtonian viscoelastic fluid flow passes through the porous wall of an axisymmetric channel on a turbine disc for cooling application. The present article solves the couple equations (momentum and heat transfer) of a non-Newtonian fluid flow in an ...
A.S. Dogonchi, D.D. Ganji
doaj   +1 more source

The effect of the application of the exact and approximate methods on values of selected ecological indices

open access: yesActa Agrobotanica, 2014
The work presents the results of a study on the biodiversity of agrocenoses using ecological indices. In order to calculate the measures, phytosociological relevés were made and exact methods were applied in winter cereals, spring cereals, tuber crops ...
Maria Ługowska, Zofia Rzymowska
doaj   +1 more source

The impact of dual‐signal selection and multiple eavesdroppers on secrecy performance in cooperative‐relay systems

open access: yesIET Communications, 2022
This paper investigates the impact of a dual‐signal selection (i.e. selection of direct signal and relay signal) and multiple eavesdroppers on secrecy outage probability in cooperative‐relay systems over Nakagami fading channels.
Donghun Lee
doaj   +1 more source

Analytical Solution of a Nonlinear Index-Three DAEs System Modelling a Slider-Crank Mechanism

open access: yesDiscrete Dynamics in Nature and Society, 2015
The slider-crank mechanism (SCM) is one of the most important mechanisms in modern technology. It appears in most combustion engines including those of automobiles, trucks, and other small engines.
Brahim Benhammouda, Hector Vazquez-Leal
doaj   +1 more source

Development of a Regional F‐Region Critical Frequency Model for Southern Africa

open access: yesSpace Weather, 2023
A new localized linear regression model, called the SANSA model, is presented. The model provides a forecast of the F‐region critical frequency (foF2) over Grahamstown, South Africa (33.31°S, 26.52°E).
S. Brijraj, P. J. Cilliers, M. Kosch
doaj   +1 more source

Development and Testing of a Soft Exoskeleton Robotic Hand Training Device

open access: yesSensors, 2023
Hand-function recovery is often a goal for stroke survivors undergoing therapy. This work aimed to design, build, and verify a pneumatic hand training device for its eventual use in post-stroke rehabilitation.
Gregory Jackson, Hussein A. Abdullah
doaj   +1 more source

A Novel Approximation for K Distribution: Closed-Form BER Using DPSK Modulation in Free-Space Optical Communication

open access: yesIEEE Photonics Journal, 2017
A new analytical approximate expression for K distribution is proposed by expanding it in terms of orthogonal associated Laguerre polynomial. The expansion is truncated after first three terms, which yields a fairly close approximation to K distribution.
Rajeev Kumar Singh   +2 more
doaj   +1 more source

Deep Medical Image Reconstruction with Autoencoders using Deep Boltzmann Machine Training [PDF]

open access: yesEAI Endorsed Transactions on Pervasive Health and Technology, 2020
INTRODUCTION: Deep learning-based Image compression achieves a promising result in recent years as compared with the traditional transform coding methodology.
Saravanan. S, Sujitha Juliet
doaj   +1 more source

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