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Secure Transmission of Compressed Medical Image Sequences on Communication Networks Using Motion Vector Watermarking

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Computers, Materials & Continua 2024年第3期78卷 3283-3301页

作者： Rafi Ullah Mohd Hilmi bin Hasan sultan Daud Khan Mussadiq Abdul Rahim Computer and Information Sciences Department Universiti Teknologi PETRONASBandar Seri Iskandar Perak32610Malaysia Department of Computer Science National University of TechnologyIslamabad46000Pakistan Interdisciplinary Research Center for Intelligent Secure Systems King Fahd University of Petroleum and MineralsDammam31261Saudi Arabia

Medical imaging plays a key role within modern hospital management systems for diagnostic *** methodologies are extensively employed to mitigate storage demands and enhance transmission speed,all while upholding image ***,an increasing number of hospitals are embracing cloud computing for patient data storage,necessitating meticulous scrutiny of server security and privacy ***,considering the widespread availability of multimedia tools,the preservation of digital data integrity surpasses the significance of compression *** response to this concern,we propose a secure storage and transmission solution for compressed medical image sequences,such as ultrasound images,utilizing a motion vector watermarking *** watermark is generated employing an error-correcting code known as Bose-Chaudhuri-Hocquenghem(BCH)and is subsequently embedded into the compressed sequence via block-based motion *** the process of watermark embedding,motion vectors are selected based on their magnitude and phase *** embedding watermarks,no specific spatial area,such as a region of interest(ROI),is used in the *** embedding of watermark bits is dependent on motion *** reversible watermarking allows the restoration of the original image sequences,we use the irreversible watermarking *** reason for this is that the use of reversible watermarks may impede the claims of ownership and legal *** restoration of original data or images may call into question ownership or other legal *** peak signal-to-noise ratio(PSNR)and structural similarity index(SSIM)serve as metrics for evaluating the watermarked image *** all images,the PSNR value exceeds 46 dB,and the SSIM value exceeds *** results substantiate the efficacy of the proposed technique in preserving data integrity.

关键词： Block matching algorithm(BMA) compression full-search algorithm motion vectors ultrasound image sequence watermarking

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Flow on oscillating rectangular duct for Maxwell fluid

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Applied Mathematics and Mechanics(English Edition) 2012年第6期33卷 717-730页

作者： M.NAZAR F.SHAHID M.SAEED AKRAM Q.sultan Centre for Advanced Studies in Pure and Applied Mathematics Bahauddin Zakariya University

This paper presents an analysis for the unsteady flow of an incompress- ible Maxwell fluid in an oscillating rectangular cross section. By using the Fourier and Laplace transforms as mathematical tools, the solutions are presented as a sum of the steady-state and transient solutions. For large time, when the transients disappear, the solution is represented by the steady-state solution. The solutions for the Newtonian fluids appear as limiting cases of the solutions obtained here. In the absence of the fre- quency of oscillations, we obtain the problem for the flow of the Maxwell fluid in a duct of a rectangular cross-section moving parallel to its length. Final!y, the required time to reach the steady-state for sine oscillations of the rectangular duct is obtained by graphical illustrations for different parameters. Moreover, the graphs are sketched for the velocity.

关键词： Maxwell fluid oscillating rectangular duct velocity field

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Optimization of Am-Be millicuries neutron source in a small volume cylindrical water tank for NAA

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Radiation Detection Technology and Methods 2019年第3期3卷 78-83页

作者： Abdul Waheed M.Ishaq Mahmood sultan National Center for Physics Quaid-i-Azam UniversityIslamabadPakistan Radiation Physics Lab Physics DepartmentCOMSATS Institute of Information Technology(COMSATS University)IslamabadPakistan Centre for Earthquake Studies National Centre for PhysicsQAUIslamabadPakistan

Background The neutron activation analysis(NAA)is a very powerful method for multi-element analysis of *** technique needs to be developed for low neutron flux in millicuries using the 241Am-Be neutron *** To optimize sample and neutron source geometry for maximumγ-ray yield for neutron activation *** Gamma ray neutron activation analysis(NAA)has been set up where a 50-millicurie Am-Be neutron source is *** this experimental setup,the neutron source is placed at the center of a cylindrical water tank of 40 x 40 cm in xyz plan,and thermal neutrons are produced at a distance of 1.2 cm from the *** system is used for the activation analysis of sodium carbonate,sodium chloride and copper with the gamma ray emissions of 1.37,1.73,2.25 and 2.76 MeV for 24Na and 0.511 MeV for 64Cu having half lives of 15 hrs and 12.9 hrs,*** thermal neutron activation analysis has been demonstrated by placing the samples at about 1.2 cm from the neutron *** and 3x3 inch NaI(Tl)gamma ray spectrometers have been used for the gamma ray spectrometry of these activated samples with the use of a Marinelli *** geometry of the sample with respect to the neutron source has been optimized for the maximumγ-ray yield in *** The geometry of the sample with respect to the neutron source has been optimized for the maximumγ-ray yield in *** increase in gamma ray flux distribution in the medium of water,due to the neutron source inside the tank,has been observed by a GM detector which is due to the production of short-lived 16N on activation of 16O in *** system can also be used for promptγ-ray analysis.

关键词： Am-Be neutron source Sodium carbonate Copper samples NAA setup NaI(Tl) HPGe spectroscopy

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SVM and KNN Based CNN Architectures for Plant Classification

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Computers, Materials & Continua 2022年第6期71卷 4257-4274页

作者： Sukanta Ghosh Amar Singh Kavita N.Z.Jhanjhi Mehedi Masud sultan Aljahdali Lovely Professional University Jalandhar144005India Department of Computer Science and Engineering Chandigarh UniversityMohaliIndia School of Computer Science and Engineering Tailor’s UniversitySubang Jaya47500Malaysia Department of Computer Science College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia

Automatic plant classification through plant leaf is a classical problem in Computer *** classification is challenging due to the introduction of new species with a similar pattern and *** efforts are made to automate plant classification using plant leaf,plant flower,bark,or *** much effort,it has been proven that leaf is the most reliable source for plant *** it is challenging to identify a plant with the help of leaf structure because plant leaf shows similarity in morphological variations,like sizes,textures,shapes,and ***,it is required to normalize all plant leaves into the same size to get better *** Neural Networks(CNN)provides a fair amount of accuracy when leaves are classified using this *** the performance can be improved by classifying using the traditional approach after applying *** this paper,two approaches,namely CNN+Support Vector Machine(SVM)and CNN+K-Nearest Neighbors(kNN)used on 3 datasets,namely LeafSnap dataset,Flavia Dataset,and MalayaKew *** datasets are augmented to take care all the *** assessments and correlations of the predetermined feature extractor models are ***+kNN managed to reach maximum accuracy of 99.5%,97.4%,and 80.04%,respectively,in the three datasets.

关键词： Plant leaf classification artificial intelligence SVM kNN deep learning deep CNN training epoch

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International Standard Certification and Firms' Export Performance:Evidence from Saudi Arabia

International Standard Certification and Firms' Export Perfo...

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作者： ALSHEHRI.sultan MOHAMMED A 南京农业大学

学位级别：硕士

自1987年引入ISO 9000标准以来,无论是在发达国家还是在发展中国家,寻求注册和认证的公司数量都有了巨大的增长。虽然发达国家和一些发展中国家对ISO 9000实施的研究已有大量文献,但目前对沙特制造业影响ISO9000实施因素的研究资料相对... 详细信息

自1987年引入ISO 9000标准以来,无论是在发达国家还是在发展中国家,寻求注册和认证的公司数量都有了巨大的增长。虽然发达国家和一些发展中国家对ISO 9000实施的研究已有大量文献,但目前对沙特制造业影响ISO9000实施因素的研究资料相对较少。这一课题没有得到足够的重视,中东国家也确实缺乏这方面的研究。因此,本研究旨在探讨、识别及分析影响沙特制造业推行ISO 9000标准的因素。通过世界银行企业调查对沙特阿拉伯制造业企业进行了实证研究,旨在通过国际质量标准认证对沙特企业出口绩效的影响来研究沙特制造业企业的出口绩效。在数据分析方面,运用回归分析法和后文的PSM方法,分析了国际质量标准认证对沙特企业/企业出口行为的影响。数据分析是这项研究的贡献,它有助于提高沙特阿拉伯制造/出口组织对ISO的了解。本文以世界银行2005年企业调查的相关数据为基础,运用回归分析和PSM方法,分析了国际质量标准认证对沙特企业出口行为的影响。研究表明,出口扩张的国际质量标准认证对企业出口机会的边际概率有显著影响。随着国际质量标准认证的实施,企业出口量不断增加;国际质量标准认证对企业出口利润率也有着显著的影响,有助于扩大企业的出口销售规模。用PSM方法得到的结果表明了鲁棒性的有效性。

关键词： ISO9000 制造业沙特阿拉伯出口

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Incentive-Driven Approach for Misbehavior Avoidance in Vehicular Networks

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Computers, Materials & Continua 2022年第3期70卷 6089-6106页

作者： Shahid sultan Qaisar Javaid Eid Rehman Ahmad Aziz Alahmadi Nasim Ullah Wakeel Khan Department of Computer Science and Software Engineering International Islamic UniversityIslamabad44000Pakistan Department of Software Engineering Foundation University Islamabad44000Pakistan Department of Electrical Engineering Taif University KSA Taif21944Saudi Arabia Department of Electrical Engineering Foundation University Islamabad44000Pakistan

For efficient and robust information exchange in the vehicular adhoc network,a secure and trusted incentive reward is needed to avoid and reduce the intensity of misbehaving nodes and congestion especially in the case where the periodic beacons exploit the *** addition,we cannot be sure that all vehicular nodes eagerly share their communication assets to the system for message dissemination without any ***,there may be some misbehaving nodes and due to their selfish and greedy approach,these nodes may not help others on the *** deal with this challenge,trust-based misbehavior avoidance schemes are generally reflected as the capable *** this paper,we employed a fair incentive mechanism for cooperation aware vehicular communication *** order to deploy a comprehensive credit based rewarding scheme,the proposed rewardbased scheme fully depends on secure and reliable cryptographic *** order to achieve the security goals,we used the cryptographic scheme to generate a certified public key for the authenticity of every message exchange over the *** evaluated the friction of misbehaving vehicles and the effect of rewarding schemes in context with honest messages dissemination over the network.

关键词： VANET misbehavior reputation rewards congestion avoidance certified public key

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Dissipative flow features of Carreau nanofluid with thermal radiation inside plane wall channel:Jeffery-Hamel analysis

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Propulsion and Power Research 2023年第2期12卷 253-272页

作者： Sohail Rehman Hashim Fuad A.MAl-Yarimi sultan Alqahtani Mohammed Awade Department Mechanical Engineering School of Material Sciences and EngineeringGeorgia Institute of TechnologyAtlantaGAUSA Department of Mathematics and Statistics University of HaripurHaripur 22620Pakistan Department of Computer Science King Khalid UniversityMuhayel AseerSaudi Arabia College of Engineering Mechanical Engineering DepartmentKing Khalid UniversityAbhaSaudi Arabia Department of Information Systems King Khalid UniversityMuhayel AseerSaudi Arabia

The current article communicates a numerical investigation on laminar flow of dissipative generalized Newtonian Carreau nanofluid flowing through vertical conduit with converging and diverging plane *** and concentration characteristics due to enthalpy change,activation energy,and non-linear thermal radiation have been examined in the presence of buoyancy *** channel walls for both temperature and volumetric fraction are assumed to be *** instability mechanism of nanofluids is reported using a two-phase nanofluid model,which works reasonably well for nanoparticle concentrations below a certain threshold.A Jeffery-Hamel(J-H)flow model is developed by assuming an incompressible purely radial flow of Carreau nanofluids with heat and mass *** the suitable non-dimensional variables,the resulting nonlinear partial differential equations are turned into a system of ordinary differential *** modified governing equations are then numerically solved using the built-in boundary value problem solver bvp4c,on the template form of commercial software *** impacts of material,geometrical and thermophysical parameters governing the J-H problem are discussed and *** indicate that higher buoyance forces incline the velocity profiles in converging enclosure,while a slight reduction is perceived in opposing forces.A significant decrease of wall heat transmission is reflected for larger values of activation energy and radiation *** endorsing this communication,a comparison analysis is established with existing research and noticed a remarkable ***,the flow inside converging and diverging channels are deployed in nuclear reactors that use plate-type nuclear energies,high heat-flux condensed heat exchangers,high-performance micro-electronic cooling systems,jets,rockets nozzles,and jet propulsion inlet.

关键词： Nanofluids Buoyancy forces Converging/diverging channels Thermal radiation Activation energy Carreau fluid

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Non-target lung embolization during portal vein embolization due to an unrecognized portosystemic venous fistula:A case report

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World Journal of Clinical Cases 2023年第15期11卷 3625-3630页

作者： sultan R Alharbi Mohammed Bin Nasif Haifa Bandar Alwaily Interventional Radiology Unit Department of RadiologyCollege of MedicineKing Saud UniversityKing Khalid University HospitalRiyadh 11362Saudi Arabia Department of Radiology College of MedicineKing Saud UniversityRiyadh 11362Saudi Arabia

BACKGROUND Portal vein embolization(PVE)is an effective and relatively safe procedure performed prior to major hepatic resection to enhance future liver *** embolization during PVE is rare,and if it occurs,it usually affects the future liver *** portosystemic venous fistulas are extremely rare in non-cirrhotic *** report a case of non-targeted lung embolization during PVE due to an unrecognized intrahepatic portosystemic *** SUMMARY A 60-year-old male presented with metastatic colon cancer of the *** patient underwent preoperative right *** the embolization procedure,a small amount of glue and lipiodol emulsion was embolized to the heart and lungs through an unrecognized intrahepatic portosystemic *** patient remained clinically stable and underwent the planned hepatic resection after 4 wk,with an uneventful postoperative *** Conventional portograms and careful evaluation prior to PVE are advisable to avoid such complications.

关键词： Portal vein embolization Non-target embolization Portosystemic venous fistula Case report

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Cryptanalysis of 2D-SCMCI Hyperchaotic Map Based Image Encryption Algorithm

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Computer Systems Science & Engineering 2023年第8期46卷 2401-2414页

作者： Mohammed S.Alshehri sultan Almakdi Mimonah Al Qathrady Jawad Ahmad Department of Computer Science Najran UniversityNajran55461Saudi Arabia Department of Information Systems Najran UniversityNajran55461Saudi Arabia School of Computing Edinburgh Napier UniversityEdinburghEH105DTUK

Chaos-based cryptosystems are considered a secure mode of communication due to their *** maps are associated with the other domains to construct robust encryption *** exist numerous encryption schemes in the literature based on chaotic *** work aims to propose an attack on a recently proposed hyper-chaotic map-based *** core notion of the original algorithm was based on permutation and diffusion.A bitlevel permutation approach was used to do the permutation row-and *** diffusion was executed in the forward and backward *** statistical strength of the cryptosystem has been demonstrated by extensive testing conducted by the author of the *** cryptanalysis article investigates the robustness of this cryptosystem against a chosen-plaintext *** secret keys of the cryptosystem were retrieved by the proposed attack with 258 chosen-plain *** results in this manuscript suggest that,in addition to standard statistical evaluations,thorough cryptanalysis of each newly suggested cryptosystem is necessary before it can be used in practical ***,the data retrieved is also passed through some statistical analysis to compare the quality of the original and retrieved *** results of the performance analysis indicate the exact recovery of the original *** make the cryptosystem useful for applications requiring secure data exchange,a few further improvement recommendations are also suggested.

关键词： Cryptanalysis hyperchaotic map image encryption chosen-plaintext attack cryptosystem

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Robust Image Watermarking Using LWT and Stochastic Gradient Firefly Algorithm

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Computers, Materials & Continua 2023年第4期75卷 393-407页

作者： Sachin Sharma Meena Malik Chander Prabha Amal Al-Rasheed Mona Alduailij sultan Almakdi Department of CSE Koneru Lakshmaiah Education FoundationGunturAndhra Pradesh522302India Deparmtent of CSE Chandigarh UniversityMohaliPunjab140413India Chitkara University Institute of Engineering and Technology Chitkara UniversityPunjab140401India College of Computer and Information Sciences Princess Nourah Bint Abdulrahman University84428Riyadh11671Saudi Arabia Department of Computer Science College of Computer Science and Information SystemsNajran UniversityNajran55461Saudi Arabia

Watermarking of digital images is required in diversified applicationsranging from medical imaging to commercial images used over the ***, the copyright information is embossed over the image in the form ofa logo at the corner or diagonal text in the background. However, this formof visible watermarking is not suitable for a large class of applications. In allsuch cases, a hidden watermark is embedded inside the original image as proofof ownership. A large number of techniques and algorithms are proposedby researchers for invisible watermarking. In this paper, we focus on issuesthat are critical for security aspects in the most common domains like digitalphotography copyrighting, online image stores, etc. The requirements of thisclass of application include robustness (resistance to attack), blindness (directextraction without original image), high embedding capacity, high Peak Signalto Noise Ratio (PSNR), and high Structural Similarity Matrix (SSIM). Mostof these requirements are conflicting, which means that an attempt to maximizeone requirement harms the other. In this paper, a blind type of imagewatermarking scheme is proposed using Lifting Wavelet Transform (LWT)as the baseline. Using this technique, custom binary watermarks in the formof a binary string can be embedded. Hu’s Invariant moments’ coefficientsare used as a key to extract the watermark. A Stochastic variant of theFirefly algorithm (FA) is used for the optimization of the technique. Undera prespecified size of embedding data, high PSNR and SSIM are obtainedusing the Stochastic Gradient variant of the Firefly technique. The simulationis done using Matrix Laboratory (MATLAB) tool and it is shown that theproposed technique outperforms the benchmark techniques of watermarkingconsidering PSNR and SSIM as quality metrics.

关键词： Image watermarking lifting wavelet transform discrete wavelet transform(DWT) firefly technique invariant moments

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