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Tamper Detection and Localization for Quranic Text Watermarking Scheme Based on Hybrid Technique

Computers, Materials & Continua 2021年第7期68卷 77-102页

作者： ali a.r.alkhafaji Nilam Nur Amir Sjarif M.A.Shahidan Nurulhuda Firdaus Mohd Azmi Haslina Md Sarkan Suriayati Chuprat razak Faculty of Technology and Informatics University Teknologi MalaysiaKuala Lumpur54000Malaysia

The text of the Quran is principally dependent on the Arabic ***,improving the security and reliability of the Quran’s text when it is exchanged via internet networks has become one of the most difcult challenges that researchers face ***,the diacritical marks in the Holy Quran which represent Arabic vowels(i,j.s)known as the kashida(or“extended letters”)must be protected from *** cover text of the Quran and its watermarked text are different due to the low values of the Peak Signal to Noise ratio(PSNr),and Normalized Cross-Correlation(NCC);thus,the location for tamper detection accuracy is *** gap addressed in this paper to improve the security of Arabic text in the Holy Quran by using vowels with *** enhance the watermarking scheme of the text of the Quran based on hybrid techniques(XOr and queuing techniques)of the purposed *** methodology propose scheme consists of four phases:The rst phase is *** is followed by the second phase where an embedding process takes place to hide the data after the vowel letters wherein if the secret bit is“1”,it inserts the kashida but does not insert the kashida if the bit is“0”.The third phase is an extraction process and the last phase is to evaluate the performance of the proposed scheme by using PSNr(for the imperceptibility),and NCC(for the security of the watermarking).Experiments were performed on three datasets of varying lengths under multiple random locations of insertion,reorder and deletion *** experimental results were revealed the improvement of the NCC by 1.76%,PSNr by 9.6%compared to available current schemes.

关键词： Text watermarking tamper detection authentication quranic text exclusive-or operation queuing technique

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Payload Capacity Scheme for Quran Text Watermarking Based on Vowels with Kashida

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Computers, Materials & Continua 2021年第6期67卷 3865-3885页

作者： ali a.r.alkhafaji Nilam Nur Amir Sjarif M.A Shahidan Nurulhuda Firdaus Mohd Azmi Haslina Md Sarkan Suriayati Chuprat Osamah Ibrahim Khalaf Ehab Nabiel Al-Khanak razak Faculty of Technology and Informatics University Teknologi MalaysiaKuala Lumpur54000Malaysia Al-Nahrain University Al-Nahrain Nanorenewable Energy Research CentreBaghdadIraq Department of Transport and Planning Faculty of Civil Engineering and Geosciences(CiTG)Delft University of TechnologyDelftNetherlands

The most sensitive Arabic text available online is the digital Holy *** sacred Islamic religious book is recited by all Muslims worldwide including non-Arabs as part of their worship ***,it should be protected from any kind of tampering to keep its invaluable meaning *** characteristics of Arabic letters like the vowels(),Kashida(extended letters),and other symbols in the Holy Quran must be secured from *** cover text of the Quran and its watermarked text are different due to the low values of the Peak Signal to Noise ratio(PSNr)and Embedding ratio(Er).A watermarking technique with enhanced attributes must,therefore,be designed for the Quran’s text using Arabic vowels with *** gap addressed by this paper is to improve the security of Arabic text in the Holy Quran by using vowels with *** purpose of this paper is to enhance the Quran text watermarking scheme based on a reversing *** methodology consists of four phases:The first phase is a pre-processing followed by the second phase-the embedding process phase—which will hide the data after the *** is,if the secret bit is“1”,then the kashida is inserted;however,the kashida is not inserted if the bit is“0”.The third phase is the extraction process and the last phase is to evaluate the performance of the proposed scheme by using PSNr(for the imperceptibility)and Er(for the capacity).The experimental results show that the proposed method of imperceptibility insertion is also optimized with the help of a reversing *** proposed strategy obtains a 90.5%***,the proposed algorithm attained 66.1%which is referred to as imperceptibility.

关键词： Quran text watermarking Arabic text capacity imperceptibility Kashida vowels reversing technique

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Complement-dependent neuroinflammation in spinal cord injury:from pathology to therapeutic implications

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Neural regeneration research 2025年第5期20卷 1324-1335页

作者： Hassan Saad Bachar El Baba ali Tfaily Firas Kobeissy Juanmarco Gutierrez Gonzalez Daniel refai Gerald r.rodts Christian Mustroph David Gimbel Jonathan Grossberg Daniel L.Barrow Matthew F.Gary ali M.Alawieh Department of Neurosurgery Emory University School of MedicineAtlantaGAUSA Department of Neurology Yale UniversityNew HavenCTUSA Center for Neurotrauma Multiomics&Biomarkers(CNMB)Morehouse School of MedicineAtlantaGAUSA

Spinal cord injury remains a major cause of disability in young adults,and beyond acute decompression and rehabilitation,there are no pharmacological treatments to limit the progression of injury and optimize recovery in this *** the thorough investigation of the complement system in triggering and propagating cerebral neuroinflammation,a similar role for complement in spinal neuroinflammation is a focus of ongoing *** this work,we survey the current literature investigating the role of complement in spinal cord injury including the sources of complement proteins,triggers of complement activation,and role of effector functions in the *** study relevant data demonstrating the different triggers of complement activation after spinal cord injury including direct binding to cellular debris,and or activation via antibody binding to damage-associated molecular *** effector functions of complement have been implicated in spinal cord injury,and we critically evaluate recent studies on the dual role of complement anaphylatoxins in spinal cord injury while emphasizing the lack of pathophysiological understanding of the role of opsonins in spinal cord *** this pathophysiological review,we systematically review the different translational approaches used in preclinical models of spinal cord injury and discuss the challenges for future translation into human *** review emphasizes the need for future studies to dissect the roles of different complement pathways in the pathology of spinal cord injury,to evaluate the phases of involvement of opsonins and anaphylatoxins,and to study the role of complement in white matter degeneration and regeneration using translational strategies to supplement genetic models.

关键词： complement neuroinflammation neuroplasticity regeneration spinal cord injury targeted therapy

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Waste Heat recovery from a Drier receiver of an A/C Unit Using Thermoelectric Generators

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Energy Engineering 2023年第8期120卷 1729-1746页

作者： ali Jaber Abdulhamed Aws Al-Akam Ahmed A.Abduljabbar Mohammed H.alkhafaji Energy Engineering Department Faculty of Engineering/AL-MussayibUniversity of BabylonHillaBabylonIraq Construction and Projects Department Al Iraqia UniversityBaghdadIraq Department of Electrical Engineering University of TechnologyBaghdadIraq

Thermoelectric generators(TEGs)are considered promising devices for waste heat recovery from various *** Seebeck effect can be utilized to generate power using the residual heat emitted by the filter dryer receiver(FDr)of an air conditioning(A/C)system,which would otherwise go to *** study aims to build a set of thermoelectric generators(TEG)to collect the waste heat of the FDr and generate low-power electricity.A novel electrical circuit with two transformers is designed and fabricated to produce a more stable voltage for operation and *** thermoelectric generator(TEGs)was installed on the FDr of the A/C *** test showed that climate conditions have a significant impact on the output power generated from the *** results showed that the peak voltage recorded in the current study is 5.2 V per day(wet,cold,and wind weather)with an output power of 0.2 *** values are acceptable for powering the load and charging a single battery with 3.5 V as the voltage increases battery 0.1 V/20 min charge.A case study of operating the emergency signs in a building was *** current heat recovery system is deemed to be easily installed and can be connected to a network of TEGs to produce more power.

关键词： Thermoelectric generator waste heat filter dryer receiver air conditioning heat recovery

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Wake structure and similar behavior of wake profiles downstream of a plunging airfoil

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Chinese Journal of Aeronautics 2017年第4期30卷 1281-1293页

作者： ali r.DAVArI Department of Mechanical and Aerospace Engineering Science and Research Branch Islamic Azad University Tehran147789-3855 Iran

Very limited attention has already been paid to the velocity behavior in the wake region in unsteady aerodynamic problems. A series of tests has been performed on a flapping airfoil in a subsonic wind tunnel to study the wake structure for different sets of mean angle of attack, plunging amplitude and reduced frequency. In this study, the velocity profiles in the wake for various oscillation parameters have been measured using a wide shoulder rake, especially designed for the present experiments. The airfoil under consideration was a critical section of a 660 k W wind *** results show that for a flapping airfoil the wake structure can be of drag producing type, thrust producing or neutral, depending on the mean angle of attack, oscillation amplitude and reduced frequency. In a thrust producing wake, a high-momentum high-velocity jet flow is formed in the core region of the wake instead of the conventional low-momentum flow. As a result, the drag force normally experienced by the body due to the momentum deficit would be replaced by a thrust *** to the results, the momentum loss in the wake decreases as the reduced frequency increases. The thrust producing wake pattern for the flapping airfoil has been observed for sufficiently low angles of attack in the absence of the viscous effects. This phenomenon has also been observed for either high oscillation amplitudes or high reduced frequencies. According to the results, for different reduced frequencies and plunging amplitudes, such that the product of them be a constant, the velocity profiles exhibit similar behavior and coalesce on each other. This similarity parameter works excellently at small angles of attack. However, at near stall boundaries, the similarity is not as evident as before.

关键词： Hysteresis Plunging reduced frequency Von Krmn street Wake

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robust H_∞ control for uncertain Markovian jump systems with mixed delays

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Chinese Physics B 2016年第7期25卷 108-113页

作者： r Saravanakumar M Syed ali Department of Mathematics Thiruvalluvar University

We scrutinize the problem of robust H∞control for a class of Markovian jump uncertain systems with interval timevarying and distributed delays. The Markovian jumping parameters are modeled as a continuous-time finite-state Markov chain. The main aim is to design a delay-dependent robust H∞control synthesis which ensures the mean-square asymptotic stability of the equilibrium point. By constructing a suitable Lyapunov–Krasovskii functional（LKF）, sufficient conditions for delay-dependent robust H∞control criteria are obtained in terms of linear matrix inequalities（LMIs）. The advantage of the proposed method is illustrated by numerical examples. The results are also compared with the existing results to show the less conservativeness.

关键词： linear matrix inequality Lyapunov method Markovian jumping parameters robust H∞ control

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An investigation of planetary nebulae accompanying PG 1159 central stars,based on Gaia Dr2 measurements

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research in Astronomy and Astrophysics 2021年第6期21卷 397-402页

作者： Alaa ali Wedad r.Alharbi Department of Astronomy Faculty of ScienceCairo University12613 GizaEgypt Department of Physics College of ScienceUniversity of Jeddah23890 JeddahSaudi Arabia

This article discusses the physical and kinematical characteristics of planetary nebulae accompanying PG 1159 central *** study is based on the parallax and proper motion measurements recently offered by the Gaia space *** approaches were used to investigate the kinematical properties of the *** results revealed that most of the studied nebulae arise from progenitor stars in the mass range 0.9-1.75 M⊙.Furthermore,they tend to live within the Galactic thick disk and move with an average peculiar velocity of 61.7±19.2 km s^(-1) at a mean vertical height of 469±79 *** locations of the PG 1159 stars on the H-r diagram indicate that they have an average final stellar mass and evolutionary age of 0.58±0.08 M⊙and 25.5±5.3×103 yr,*** found a good agreement between the mean evolutionary age of the PG 1159 stars and the mean dynamical age of their companion planetary nebulae(28.0±6.4×103 yr).

关键词： planetary nebulae:general methods:kinematics stars:individual(PG 1159)

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Augmented Lyapunov approach to H_∞ state estimation of static neural networks with discrete and distributed time-varying delays

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Chinese Physics B 2015年第5期24卷 140-147页

作者： M.Syed ali r.Saravanakumar Department of Mathematics Thiruvalluvar University

This paper deals with H∞ state estimation problem of neural networks with discrete and distributed time-varying delays. A novel delay-dependent concept of H∞ state estimation is proposed to estimate the H∞ performance and global asymptotic stability of the concerned neural networks. By constructing the Lyapunov-Krasovskii functional and using the linear matrix inequality technique, sufficient conditions for delay-dependent H∞ performances are obtained, which can be easily solved by some standard numerical algorithms. Finally, numerical examples are given to illustrate the usefulness and effectiveness of the proposed theoretical results.

关键词： distributed delay H∞ state estimation neural networks stability analysis

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Improved delay-dependent robust H_∞ control of an uncertain stochastic system with interval time-varying and distributed delays

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Chinese Physics B 2014年第12期23卷 5-13页

作者： M.Syed ali r.Saravanakumar Department of Mathematics Thiruvalluvar University

In this paper, the robust H∞control problem for a class of stochastic systems with interval time-varying and distributed delays is discussed. The system under study involves parameter uncertainty, stochastic disturbance, interval time-varying,and distributed delay. The aim is to design a delay-dependent robust H∞control which ensures the robust asymptotic stability of the given system and to express it in the form of linear matrix inequalities（LMIs）. Numerical examples are given to demonstrate the effectiveness of the proposed method. The results are also compared with the existing results to show its conservativeness.

关键词： distributed delay interval time-varying delay H∞control linear matrix inequality(LMI) stochastic systems

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robust H_∞ control of uncertain systems with two additive time-varying delays

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Chinese Physics B 2015年第9期24卷 25-34页

作者： M.Syed ali r.Saravanakumar Department of Mathematics Thiruvalluvar University

This paper is concerned with the problem of delay-dependent robust H∞control for a class of uncertain systems with two additive time-varying delays. A new suitable Lyapunov–Krasovskii functional（LKF） with triple integral terms is constructed and a tighter upper bound of the derivative of the LKF is derived. By applying a convex optimization technique, new delay-dependent robust H∞stability criteria are derived in terms of linear matrix inequalities（LMI）. Based on the stability criteria, a state feedback controller is designed such that the closed-loop system is asymptotically ***, numerical examples are given to illustrate the effectiveness of the proposed method. Comparison results show that our results are less conservative than the existing methods.

关键词： additive time-varying delays Lyapunov method H∞ control linear matrix inequality

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