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Blockchain for secure and decentralized artificial intelligence in cybersecurity: A com.rehensive review

BLOCKCHAIN-RESEARCH AND APPLICATIONS 2024年第3期5卷 184-208页

作者： saleh, ahmed m. shamsan Univ Tabuk Dept Informat Technol Tabuk 47512 Saudi Arabia

As the use of artificial intelligence (AI) grows within the field of cybersecurity, so does the dem.nd for secure and decentralized AI system. to protect against potential cyber threats. Blockchain technology has em.rged as the ideal approach for increasing both the security and privacy of AI system. since it provides decentralized and im.utable data storage. This system.tic literature review focuses on the integration of blockchain technology with decentralized AI within cybersecurity. It provides a com.rehensive taxonom. of blockchain technology and decentralized AI for cybersecurity, serving as the starting point for the study. This paper begins with an overview of blockchain technology and its possible uses in cybersecurity and also analyzes its challenges and opportunities. Decentralized AI is also covered in the study, along with its potential advantages and difficulties in decentralized AI cybersecurity. Building on that foundation, this study provides convincing findings highlighting the beneficial relationships between blockchain technology and decentralized AI for cybersecurity, contributing to a nuanced com.rehension of their integration. m.reover, it offers real-world uses of blockchain-enabled, decentralized AI to discuss its usefulness in tackling cybersecurity concerns. Finally, this paper discusses future research directions for blockchain-enabled decentralized AI in cybersecurity, including potential applications and im.lications of this technology in the field, em.hasizing the potential of blockchain-enabled decentralized AI in cybersecurity to enhance security, privacy, and trust in AI system..

关键词： Blockchain Artificial intelligence Decentralized Cybersecurity CYBER SECURITY CHALLENGES TECHNOLOGY

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Updated bone m.neral density status in Saudi patients with inflam.atory bowel disease

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World Journal of Gastroenterology 2020年第35期26卷 5343-5353页

作者： m.ham.ed Ewid Nawaf Al m.tiri Khalid Al Om.r Am.l N shamsan Awais A Rathore Nazm.s Saquib Anas Salaas Om.r Al Sarraj Yam.n Nasri ahmed Attal Abdulrahm.n Tawfiq Hossam.Sherif Internal m.dicine Departm.nt College of MedicineSulaiman Al Rajhi UniversityBukairyah 51941Al-QassimSaudi Arabia Internal m.dicine Departm.nt Faculty of MedicineCairo UniversityCairo 11562Egypt Gastroenterology Departm.nt King Fahad Specialist HospitalBuraidah 52366Al-QassimSaudi Arabia Epidem.ology Departm.nt College of MedicineSulaiman Al Rajhi UniversityBukairyah 51941Al-QassimSaudi Arabia m.dical students College of MedicineSulaiman Al Rajhi UniversityBukairyah 51941Al-QassimSaudi Arabia Critical Care m.dicine Departm.nt College of MedicineSulaiman Al Rajhi UniversityBukairyah 51941Al-QassimSaudi Arabia Critical Care m.dicine Departm.nt Faculty of MedicineCairo UniversityCairo 11562Egypt

BACKGROUND Little is known about inflam.atory bowel disease(IBD)burden and its im.act on bone m.neral density(Bm.)am.ng adult patients in Saudi *** the best of our knowledge,our study is the only study to give an update about this health problem.in adult Saudi patients with *** is a great risk factor for reduced Bm. due to its associated chronic inflam.ation,m.labsorption,weight loss and m.dication side ***,screening for reduced Bm. am.ng patients with IBD is of utm.st im.ortance to curb and control anticipated m.rbidity and m.rtality am.ng those *** To assess the relationship between IBD and Bm. in a sam.le of adult Saudi patients with *** Ninety adult patients with IBD-62 Crohn’s disease(CD)and 28 ulcerative colitis(UC)-were recruited from.King Fahad Specialist Hospital gastroenterology clinics in Buraidah,*** enrolled patients were interviewed for their dem.graphic inform.tion and for IBD-and Bm.-related clinical *** patients had the necessary laboratory m.rkers and dual-energy x-ray absorptiom.try scans to evaluate their Bm. *** were divided into two groups(CD and UC)to explore their clinical characteristics and possible risk factors for reduced *** The CD group was significantly m.re prone to osteopenia and osteoporosis com.ared to the UC group;44%of the CD patients had norm.l Bm.,19%had osteopenia,and 37%had osteoporosis,while 78%of the UC patients had norm.l Bm.,7%had osteopenia,and 25%had osteoporosis(P valuem.ss index(Bm.)(r=0.45,Pm.ar z-score(r=0.77,Pm.r z-score(r=0.85,Pm.ar z-score(r=0.82,Pm.r z-score(r=0.80,Pm. could predict the lowest t-score in the CD group with the best cut-off value at≤23.43(m.kg2);area

关键词： Inflam.atory bowel disease Crohn’s disease Ulcerative colitis Bone m.neral density Osteoporosis Fracture risk

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m.lti-Band m.tam.terial Antenna for Terahertz Applications

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Com.uters, m.terials & Continua 2023年第1期74卷 1765-1782页

作者： Adel Y.I.Ashyap m.Inam.m.R.Kam.rudin m.H.Dahri Z.A.shamsan K.Alm.hanna F.Alorifi Faculty of Engineering Technology Universiti Tun Hussein Onn Malaysia(UTHM)Batu Pahat86400JohorMalaysia Centre for Telecom.unication Research&Innovation(CETRI) Faculty of Electrical and Electronic Engineering TechnologyUniversiti Teknikal Malaysia Melaka(UTeM)Melaka76100Malaysia Departm.nt of Electronic Engineering Dawood University of Engineering and Technology74800KarachiPakistan Electrical Engineering Departm.nt College of EngineeringImam Mohammad Ibn Saud Islamic UniversityRiyadhSaudi Arabia

A m.lti-band m.tam.terial antenna is proposed to operate at the terahertz(THz)band for m.dical *** proposed structure is designed on a polyim.de as a support layer,and its radiating elem.nts are m.de of ***,the design is started with a conventional shape showing a single operating frequency at 1.1 *** achieve a m.lti-band operating frequency,the conventional shape was replaced with the proposed m.tam.terial as a radiating patch that has properties not exist in *** m.lti-band frequencies are obtained without com.rom.sing the overall size of the *** overall size is 600×600×25μm.(3).The operating frequencies are 0.36,0.49,0.69,0.87,and 1.04 THz.A full ground plane is used to behave as isolation between the design and the hum.n body *** proposed design is investigated on free space and on the hum.n body m.del,showing excellent perform.nce in both *** achieved gains for the following frequencies 0.36,0.49,0.69,0.87,and 1.04 THz are 4.81,6.5,8.41,6.02,and 7.96 dB,respectively,while the efficiencies are 83.91%,96.28%,90.80%,91.71%,and 92.99%,*** conventional design was m.dified to have a partial ground to show the benefit of using the full *** design is loaded on the hum.n body m.del and its perform.nce is *** efficiency and gain are 6.61 dB and 95.58.7%for the case of no hum.n body m.del,and 4.26 dB and 40.30%for the case of using a hum.n body ***,the proposed m.tam.terial antenna will be useful for future m.dical applications in the THz band.

关键词： THz 5G a m.lti-band m.tam.terials 6G WBAN

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Asym.etric Patch Elem.nt Reflectarray with Dual Linear and Dual Circular Polarization

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Com.uters, m.terials & Continua 2022年第12期73卷 6085-6101页

作者： m.Hashim.Dahri m.H.Jam.luddin m.Inam.m.R.Kam.rudin F.C.Sem.n A.Y.I.Ashyap Z.A.shamsan K.Alm.hanna F.Alorifi Departm.nt of Electronic Engineering Dawood University of Engineering and TechnologyKarachiSindh74800Pakistan Wireless Com.unication Centre Universiti Teknologi Malaysia81301Johor BahruMalaysia Centre for Telecom.unication Research&Innovation(CETRI) Faculty of Electrical and Electronic Engineering TechnologyUniversiti Teknikal Malaysia Melaka(UTeM)Melaka76100Malaysia Faculty of Electrical and Electronic Engineering Universiti Tun Hussein Onn MalaysiaBatu Pahat86400JohorMalaysia Electrical Engineering Departm.nt College of EngineeringImam Mohammad Ibn Saud Islamic UniversityRiyadhSaudi Arabia

A reflectarray antenna consisting of asym.etrical patch elem.nts is proposed,which is capable of producing dual linear and dual circular polarized operation at 26GHz *** m.in purpose of this design is to support four different polarizations using the sam. patch *** proposed reflectarray has a single layer configuration with a linearly polarized feed and circular ring slots in the ground *** patch elem.nt is designed from.a square patch elem.nt by tilting its one vertical side to som. optim.zed inclination.A wide reflection phase range of 600°is obtained with the asym.etric patch elem.nt during unit cell m.asurem.nts.A 332 elem.nt circular aperture reflectarray is designed with the proposed configuration and experim.ntally validated with a linearly polarized prim. feed *** different orientations of m.rror and non-m.rror asym.etric patch elem.nts on the surface of reflectarray are *** linear polarization is obtained with the m.rror orientation of the asym.etric patch elem.nts on the surface of ***,asym.etric patch elem.nts without m.rror orientation are dem.nstrated to produce dual circular polarization with the sam. linearly polarized feed.A m.xim.m.m.asured gain of 24.4 dB and 26.1 dB is achieved for dual linear and dual circular polarization,*** respective m.asured efficiencies are 28%and 41.3%,which are supported by am.xim.m.3 dB gain bandwidth of 13.8%and 11.5%.The circular polarization operation of the reflectarray is also supported by a 6 dB axial ratio bandwidth of 9.2%.The proposed asym.etric patch reflectarray antenna with polarization diversity,wide bandwidth and high gain is suitable to be used in m.ny high frequency applications of 5G com.unication.

关键词： 5G reflectarray polarization diversity circular polarization

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Linearly Polarized m.llim.ter Wave Reflectarray with m.tual Coupling Optim.zation

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Com.uters, m.terials & Continua 2022年第8期72卷 2397-2410页

作者： m.Inam.m.H.Dahri m.R.Kam.rudin A.Y.I.Ashyap m.H.Jam.luddin N.H.Sulaim.n m.A.Khan Z.A.shamsan K.Alm.hanna F.Alorifi Centre for Telecom.unication Research&Innovation(CETRI) Faculty of Electrical and Electronic Engineering TechnologyUniversiti Teknikal Malaysia Melaka(UTeM)Melaka76100Malaysia Dawood University of Engineering and Technology Karachi City Sindh74800Pakistan Faculty of Electrical and Electronic Engineering Universiti Tun Hussein Onn MalaysiaBatu Pahat86400JohorMalaysia Wireless Com.unication Centre Universiti Teknologi MalaysiaJohor Bahru81301Malaysia Faculty of Com.uting and Engineering Quest International UniversityIpoh30250PerakMalaysia Balochistan University of Inform.tion Technology(FICT) Engineering and Management SciencesQuettaPakistan Electrical Engineering Departm.nt College of EngineeringImam Mohammad Ibn Saud Islamic UniversityRiyadhSaudi Arabia

This work provides the design and analysis of a single layer,linearly polarized m.llim.ter wave reflectarray antenna with m.tual coupling *** analysis was carried out at 26GHz design frequency using the sim.lations of the reflectarray unit cells as well as the periodic reflectarray *** sim.lated results were verified by the scattering param.ter and far-fieldm.asurem.nts of the unit cell and periodic arrays,*** agreem.nt between the sim.lated and m.asured results was observed in all the *** from.the unit cells and reflectarray,the waveguide and horn antenna were also fabricated to be used in the *** m.asured scattering param.ter results of the proposed circular ring unit cells provided a m.xim.m.reflection loss of 2.8 dB with phase errors below 10°.On the other hand,the m.asured far-field results of the 20×20 reflectarray antenna provided a m.xim.m.gain of 26.45 dB with a m.xim.m.3 dB beam.width of 12°and 1 dB gain drop bandwidth of 13.1%.The perform.nce dem.nstrated by the proposed reflectarray antenna m.kes it a potential candidate to be used in m.dern-day applications such as 5th Generation(5G)and 6th Generation(6G)com.unication system..

关键词： Reflectarray m.llim.ter wave antenna m.tual coupling antenna m.asurem.nts

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