SHA-512 Based Key Generation and Two-Dimensional Logistic Permutation with a Median Filter for Enhanced Grayscale Image Encryption

Ibtisam A Taqi

doi:10.32604/cmc.2026.082352

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Publication Date

Fri Aug 14 2026

Journal Name

Computers, Materials & Continua

Volume

89

Issue Number

2

DOI

10.32604/cmc.2026.082352

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SHA-512 Based Key Generation and Two-Dimensional Logistic Permutation with a Median Filter for Enhanced Grayscale Image Encryption

Gray image

SHA-512

chaos

2D logistic map

median filter

Ibtisam A Taqi

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Publication Date

Tue Sep 01 2020

Journal Name

Optical Fiber Technology

A novel modified fiber Bragg grating (FBG) based ammonia sensor coated with polyaniline/graphite nanofibers nanocomposites

H.A.

M.H.

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(18)

Publication Date

Thu Oct 08 2026

Journal Name

Journal Mustansiriyah Of Sports Science

The effect of using Daniel's model for people with two types of brain control (left and right) to learn the skill of the Cartwheel in artistic gymnastics for second-stage students

Daniel's model

two patterns of brain control

the Cartwheel.

Ayad

Murtada,

...Show More Authors

The research problem focused through the researcher's experience in the gymnastics game and the lack of use of educational models that give the student an important role in the educational process, so it became necessary to identify the type of prevailing style for students, and the need for diversity in the use of educational models based on scientific theories, including the Daniel Document model. Based on three theories of learning, which are structural, behavioral, and meaningful learning. The research aimed to identify the effect of using the Daniel model for people with two types of brain control (left and right) to learn the skill of the Cartwheel in artistic gymnastics for students of the second stage. The researcher used the experi

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Publication Date

Wed Oct 04 2023

Journal Name

Exergy - New Technologies And Applications

High Synthetic Image Coding System

image coding

image compression

Discrete Cosine Transform (DCT)

Discrete Wavelet Transform (DWT)

entropy coding

quantization

Abdallah

Loay

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Compressing an image and reconstructing it without degrading its original quality is one of the challenges that still exist now a day. A coding system that considers both quality and compression rate is implemented in this work. The implemented system applies a high synthetic entropy coding schema to store the compressed image at the smallest size as possible without affecting its original quality. This coding schema is applied with two transform-based techniques, one with Discrete Cosine Transform and the other with Discrete Wavelet Transform. The implemented system was tested with different standard color images and the obtained results with different evaluation metrics have been shown. A comparison was made with some previous rel

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Publication Date

Mon Jan 01 2024

Journal Name

Anais Da Academia Brasileira De Ciências

Morphological study for Accipitrid birds (Accipitridforms, Accipitridae) in Iraq; part two

A part two of Accipitridae Family members that belong to three genera: Circus

Gyps

and Neophron were documented as morphometrics

distribution ranges

and conservation status were reviewed and comprehensively discussed. A total of 29 voucher specimens belong to six species which are conserved in the “Iraq Natural History Research Center and Museum INHM” as follow: Marsh Harrier Circus aeruginosus (Linnaeus

1758)

Hen Harrier Circus cyaneus (Linnaeus

1766)

Montagus Harrier Circus pygargus (Linnaeus

1758)

Pallid Harrier Circus macrourus (Gmelin

1770)

Egyptian vulture Neophron percnopterus (Linnaeus

1758)

and Griffon vulture Gyps fulfus (Hablitz

1783). The results revealed significant criteria about near threatened NT species IUCN and Birdlife International listed as Pallid Harrier Circus macrourus

and Endangered (EN) species as Egyptian vulture Neophron percnopterus globally decreasing population trend.

HIND D.

KHALIDA I.

AFKAR M.

SUHAD Y.

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Publication Date

Fri Nov 15 2019

Journal Name

Journal Of Materials And Applications

Load Transfer Stiffness of Two-layer Roller Compacted Concrete for Pavements

Haneen

Nick

Andrew

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Roller compacted concrete (RCC) is a form of plain concrete pavement (JPCP). RCC is a zero-slump concrete consisting of well-graded aggregate, cement and water. RCC has many advantages over other pavement types, particularly cost and speed of construction. Recently, RCC has undergone many developments mostly directed towards improving quality, including smoothness and durability. RCC now has the potential to combine the performance of concrete with the low cost of asphalt installation. A two-layer system of RCC with different aggregate types and sizes was utilized in this study. This paper presents the determination of load transfer stiffness across induced joints in a two-layer RCC system based on a cyclic shear test. The test was

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(7)

Publication Date

Wed Jan 25 2023

Journal Name

Molecular Simulation

Engineering promising A-π-D type molecules for efficient organic-based material solar cells

Solar cells

optoelectronic

π-linkers

red shift

energy gap

Musaddak Maher

Taleeb Zedan

Mustafa M.

Sallal A. H.

Haider

Ahmed Mahdi

Safa K.

Abdol Ghaffar

...Show More Authors

Within this work, to promote the efficiency of organic-based solar cells, a series of novel A-π-D type small molecules were scrutinised. The acceptors which we designed had a moiety of N, N-dimethylaniline as the donor and catechol moiety as the acceptor linked through various conjugated π-linkers. We performed DFT (B3LYP) as well as TD-DFT (CAM-B3LYP) computations using 6-31G (d,p) for scrutinising the impact of various π-linkers upon optoelectronic characteristics, stability, and rate of charge transport. In comparison with the reference molecule, various π-linkers led to a smaller HOMO–LUMO energy gap. Compared to the reference molecule, there was a considerable red shift in the molecules under study (A1–A4). Therefore, based on

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(1)

(2)

Publication Date

Fri Mar 01 2019

Journal Name

Al-khwarizmi Engineering Journal

A New Fractal Printed Dipole Antenna Based on Tent Transformations for Wireless Communication Applications

Jawad K.

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In this paper, a compact multiband printed dipole antenna is presented as a candidate for use in wireless communication applications. The proposed fractal antenna design is based on the second level tent transformation. The space-filling property of this fractal geometry permits producing longer lengths in a more compact size. Theoretical performance of this antenna has been calculated using the commercially available software IE3D from Zeland Software Inc. This electromagnetic simulator is based on the method of moments (MoM). The proposed dipole antenna has been found to possess a considerable size reduction compared with the conventional printed or wire dipole antenna designed at the same design frequency and using the same substrate

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Publication Date

Wed Jun 24 2026

Journal Name

Acta Scientiarum Polonorum Administratio Locorum

Reinvigorating cultural meaning through spatial experience: A triadic model for place-based architectural learning

spatial experience

cultural meaning

place-based learning

architectural sketching

Al-Madrasah Al-Mustansiriya

MAXQDA analysis

Amal

Hoda A.S.

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Historical cultural environments are a repository of values and symbols that pass down across generations through spatial experiences. Despite their intellectual and cultural potential, their role in fostering belonging and identity has declined; they are often viewed as silent landmarks, isolated from lived experiences. This highlights the need for an integrated model that makes spatial experience a stimulating process for reinvigorating the meaning inherent in historical contexts and reconnecting the new generation with their cultural roots. This research aims to explore how cultural meaning in historical contexts can be reactivated through spatial experience. To achieve this, the study proposes a triadic model – physical encoun

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Publication Date

Sun Oct 01 2017

Journal Name

Ieee Transactions On Neural Systems And Rehabilitation Engineering

A Framework of Temporal-Spatial Descriptors-Based Feature Extraction for Improved Myoelectric Pattern Recognition

Rami N.

Ali H.

Ahmed

Adel

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(139)

Publication Date

Fri Jan 01 2021

Journal Name

Journal Of Engineering

A Proposed Adaptive Bitrate Scheme Based on Bandwidth Prediction Algorithm for Smoothly Video Streaming

Video streaming

video buffer

overflow state

underflow state

adaptive bitrate algorithm.

Saba Qasim

Dheyaa Jasim

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A robust video-bitrate adaptive scheme at client-aspect plays a significant role in keeping a good quality of video streaming technology experience. Video quality affects the amount of time the video has turned off playing due to the unfilled buffer state. Therefore to maintain a video streaming continuously with smooth bandwidth fluctuation, a video buffer structure based on adapting the video bitrate is considered in this work. Initially, the video buffer structure is formulated as an optimal control-theoretic problem that combines both video bitrate and video buffer feedback signals. While protecting the video buffer occupancy from exceeding the limited operating level can provide continuous video str

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