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A Secure and Efficient Cluster-Based Authentication Scheme for Internet of Things(IoTs)

Computers, Materials & Continua 2022年第1期70卷 1033-1052页

作者： Kanwal Imran Nasreen Anjum Abdullah Alghamdi Asadullah Shaikh mohammed hamdi Saeed Mahfooz Department of Computer Science University of PeshawarPeshawar25121Pakistan Department of Informatics King’s College LondonLondonSE59RJUK College of Computer Science and Information Systems Najran UniversityNajran61441Saudi Arabia

IPv6 over Low PowerWireless Personal Area Network(6LoWPAN)provides IP connectivity to the highly constrained nodes in the Internet of Things(IoTs).6LoWPANallows nodeswith limited battery power and storage capacity to carry IPv6 datagrams over the lossy and error-prone radio links offered by the IEEE 802.15.4 standard,thus acting as an adoption layer between the IPv6 protocol and IEEE 802.15.4 *** data link layer of IEEE 802.15.4 in 6LoWPAN is based on AES(Advanced Encryption Standard),but the 6LoWPANstandard lacks and has omitted the security and privacy requirements at higher *** sensor nodes in 6LoWPANcan join the network without requiring the authentication ***,from security perspectives,6LoWPAN is vulnerable to many attacks such as replay attack,Man-in-the-Middle attack,Impersonation attack,and Modification *** paper proposes a secure and efficient cluster-based authentication scheme(CBAS)for highly constrained sensor nodes in *** this approach,sensor nodes are organized into a cluster and communicate with the central network through a dedicated sensor *** main objective of CBAS is to provide efficient and authentic communication among the 6LoWPAN *** ensure the low signaling overhead during the registration,authentication,and handover procedures,we also introduce lightweight and efficient registration,de-registration,initial authentication,and handover procedures,when a sensor node or group of sensor nodes join or leave a *** security analysis shows that the proposed CBAS approach protects against various security attacks,including Identity Confidentiality attack,Modification attack,Replay attack,Man-in-the-middle attack,and Impersonation *** simulation experiments show that CBAS has reduced the registration delay by 11%,handoff authentication delay by 32%,and signaling cost by 37%compared to the SGMS(Secure GroupMobility Scheme)and LAMS(Light-Wight Authentication&Mobility Scheme).

关键词： IoT cyber security security attacks authentication delay handover delay signaling cost 6LoWPAN

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Social Media-Based Surveillance Systems for Health Informatics Using Machine and Deep Learning Techniques:A Comprehensive Review and Open Challenges

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Computer Modeling in Engineering & Sciences 2024年第5期139卷 1167-1202页

作者： Samina Amin Muhammad Ali Zeb Hani Alshahrani mohammed hamdi Mohammad Alsulami Asadullah Shaikh Institute of Computing Kohat University of Science and TechnologyKohat26000Pakistan Department of Computer Science College of Computer Science and Information SystemsNajran UniversityNajran61441Saudi Arabia Department of Information System College of Computer Science and Information SystemsNajran UniversityNajran61441Saudi Arabia

Social media(SM)based surveillance systems,combined with machine learning(ML)and deep learning(DL)techniques,have shown potential for early detection of epidemic *** review discusses the current state of SM-based surveillance methods for early epidemic outbreaks and the role of ML and DL in enhancing their ***,every year,a large amount of data related to epidemic outbreaks,particularly Twitter data is generated by *** paper outlines the theme of SM analysis for tracking health-related issues and detecting epidemic outbreaks in SM,along with the ML and DL techniques that have been configured for the detection of epidemic *** has emerged as a promising ML technique that adaptsmultiple layers of representations or features of the data and yields state-of-the-art extrapolation *** recent years,along with the success of ML and DL in many other application domains,both ML and DL are also popularly used in SM *** paper aims to provide an overview of epidemic outbreaks in SM and then outlines a comprehensive analysis of ML and DL approaches and their existing applications in SM ***,this review serves the purpose of offering suggestions,ideas,and proposals,along with highlighting the ongoing challenges in the field of early outbreak detection that still need to be addressed.

关键词： Social media epidemic machine learning deep learning health informatics pandemic

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WEIGHTED PSEUDO ALMOST-PERIODIC SOLUTIONS OF SHUNTING INHIBITORY CELLULAR NEURAL NETWORKS WITH MIXED DELAYS

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Acta Mathematica Scientia 2016年第6期36卷 1662-1682页

作者： mohammed Salah M'hamdi Chaouki AOUITI Abderrahmane TOUATI Adel M. ALIMI Vaclav SNASEL Department of Mathematics University of Carthage Faculty of Sciences of Bizerta BP W 7021 Zarzouna Bizerta Tunisia REGIM-lab: Research Groups on Intelligent Machines University of Sfax National Engineering School of Sfax (ENIS) BP 1173 Sfax 3038 Tunisia VSB Technical University of Ostrava Czech Republic

In this paper, we prove the existence and the global exponential stability of the unique weighted pseudo almost-periodic solution of shunting inhibitory cellular neural networks with mixed time-varying delays comprising different discrete and distributed time delays. Some sufficient conditions are given for the existence and the global exponential stability of the weighted pseudo almost-periodic solution by employing fixed point theorem and differential inequality techniques. The results of this paper complement the previously known ones. Finally, an illustrative example is given to demonstrate the effectiveness of our results.

关键词： weighted pseudo almost-periodic solution shunting inhibitory cellular neuralnetworks mixed delays global exponential stability

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An Architecture Supporting Intelligent Mobile Healthcare Using Human-Computer Interaction HCI Principles

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Computer Systems Science & Engineering 2022年第2期40卷 557-569页

作者： Mesfer Alrizq Shauban Ali Solangi Abdullah Alghamdi Muhammad Ali Nizamani Muhammad Ali Memon mohammed hamdi College of Computer Science and Information Systems Najran UniversityNajranSaudi Arabia Faculty of Engineering&Technology University of SindhJamshoro78060Pakistan

Recent advancements in the Internet of Things IoT and cloud computing have paved the way for mobile Healthcare(mHealthcare)services.A patient within the hospital is monitored by several ***,upon leaving the hospital,the patient can be remotely monitored whether directly using body wearable sensors or using a smartphone equipped with sensors to monitor different user-health *** raises potential challenges for intelligent monitoring of patient's *** this paper,an improved architecture for smart mHealthcare is proposed that is supported by HCI design *** HCI also provides the support for the User-Centric Design(UCD)for smart mHealthcare ***,the HCI along with IoT's(Internet of Things)5-layered architecture has the potential of improving User Experience(UX)in mHealthcare design and help saving *** intelligent mHealthcare system is supported by the IoT sensing and communication layers and health care providers are supported by the application layer for the medical,behavioral,and health-related *** care providers and users are further supported by an intelligent layer performing critical situation assessment and performing a multi-modal communication using an intelligent *** HCI design focuses on the ease-of-use,including user experience and safety,alarms,and error-resistant displays of the end-user,and improves user's experience and user satisfaction.

关键词： Human computer interaction mhealthcare user-centric design sensor network nternet-of-things

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A Hybrid Feature Selection Framework for Predicting Students Performance

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Computers, Materials & Continua 2022年第1期70卷 1893-1920页

作者： Maryam Zaffar Manzoor Ahmed Hashmani Raja Habib KS Quraishi Muhammad Irfan Samar Alqhtani mohammed hamdi High Performance Cloud Computing(HPC3) Department of Computer and Information SciencesUniversiti Teknologi PETRONAS32610SeriIskandarMalaysia Department of Computer Science and Information Technology University of LahorePakistan Department of Process Engineering Pakistan Institute of Engineering&Applied SciencesNiloreIslamabadPakistan Electrical Engineering Department College of EngineeringNajran UniversityNajran61441Saudi Arabia College of Computer Science and Information Systems Najran University61441NajranSaudi Arabia

Student performance prediction helps the educational stakeholders to take proactive decisions and make interventions,for the improvement of quality of education and to meet the dynamic needs of *** selection of features for student’s performance prediction not only plays significant role in increasing prediction accuracy,but also helps in building the strategic plans for the improvement of students’academic *** are different feature selection algorithms for predicting the performance of students,however the studies reported in the literature claim that there are different pros and cons of existing feature selection algorithms in selection of optimal *** this paper,a hybrid feature selection framework(using feature-fusion)is designed to identify the significant features and associated features with target class,to predict the performance of *** main goal of the proposed hybrid feature selection is not only to improve the prediction accuracy,but also to identify optimal features for building productive strategies for the improvement in students’academic *** key difference between proposed hybrid feature selection framework and existing hybrid feature selection framework,is two level feature fusion technique,with the utilization of cosine-based ***,according to the results reported in existing literature,cosine similarity is considered as the best similarity measure among existing similarity *** proposed hybrid feature selection is validated on four benchmark datasets with variations in number of features and number of *** validated results confirm that the proposed hybrid feature selection framework performs better than the existing hybrid feature selection framework,existing feature selection algorithms in terms of accuracy,f-measure,recall,and *** reported in presented paper show that the proposed approach gives more than 90%accuracy on benchmark dataset that is better tha

关键词： Educational data mining feature selection hybrid feature selection

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Furuncular myiasis by Wohlfahrtia magnifica(Diptera:Sarcophagidae)in a healthy child

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Asian Pacific Journal of Tropical Medicine 2022年第2期15卷 87-89页

作者： Majed hamdi Wakid Angham Ahmed Almakki Nouf Saleh Alsahaf mohammed Ali Almatrafi King Abdulaziz University Faculty of Applied Medical SciencesDepartment of Medical Laboratory TechnologyJeddahSaudi Arabia Special Infectious Agent Unit King Fahd Medical Research CenterKing Abdulaziz UniversityJeddahSaudi Arabia Department of Laboratory and Blood Bank Security Forces HospitalMakkahSaudi Arabia Medical College Umm Al Qura UniversityMakkahSaudi Arabia Department of Pediatrics Umm Al Qura UniversityMakkahSaudi Arabia Department of Pediatrics Security Forces HospitalMakkahSaudi Arabia

Rationale:Human myiasis is the invasion of tissue or organs by fly *** could be obligatory,facultative,or *** concerns:A 4-year-old Saudi boy complained of fever over the past three days with multiple inflamed painful dermal furuncles and worms-like ***:Furuncular obligatory myiasis caused by Wohlfahrtia ***:Maggots were removed for *** wounds were cleaned with antiseptic *** and oral antibiotics were ***:Seven days later,the wounds completely ***:Although several reports correlated human myiasis with old age,low health status,mental retardation,and low socioeconomic status,but the patient in our case was a healthy child from a family with good socioeconomic status,good hygiene,no history of diseases or mental disability,but traveled to a village where the climate is suitable for fly breeding.

关键词： Furuncule Myiasis Wohlfahrtia magnifica Maggots Saudi Arabia

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Statistical Examination of Frost Characterization: A Case of Global Warming Impact in Jordan

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Journal of Water Resource and Protection 2011年第8期3卷 620-627页

作者： Moshrik R hamdi Mahmoud Abu Alaban mohammed Jaber 不详

Radiation and advection frost are common in Jordan as well as other neighboring countries as they face several frost waves each year during the late months of winter. Recently, many frost episodes hit the valley and damaged the crops that were compensated by millions of dollars by the Jordanian Government. This manuscript addresses and characterizes frost, and assesses the role of global warming in impacting frost in terms of its frequency, severity, and total number of frost days per year. A comprehensive statistical approach was used. The paper indicates that frost waves will continue to hit in the near future regardless of the fact that Earth is moving towards warmer conditions. Agricultural and financial authorities should be urged to minimize frost damage by considering installing wind fans in Jordan valley as an active method in addition to implementing good farm practices (as a passive methods where deemed necessary).

关键词： Global Warming Frost Jordan Middle East Wind Machine Jordan Valley Trend Analysis

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Reactivity of 1-methylisoquinoline synthesis of pyrazolyl triazoloisoquinoline and thia-diazolyl isoquinoline derivatives

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Natural Science 2011年第8期3卷 651-660页

作者： hamdi M Hassaneen Huwaida M. E Hassaneen Yasmin Sh mohammed Department of Chemistry Faculty of Science Cairo University Cairo Egypt

The reaction of 1-methylisoquinoline 1 with hy-drazonoyl halides 2 in ethanol in the presence of chitosan under microwave irradiation affords triazoloisoquinoline 4. Product 4 reacts with dimethylformamide-dimethylacetal to give ena- minones 7 which react with hydrazonoyl halides to give pyrazolyl triazoloisoquinoline 13. Also, 1-methylisoquinoline 1 reacts with arylisothio-cyanate to give thioanilide 15 which reacts with hydrazonoyl halides to give the corresponding thiadiazolyl isoquinoline derivatives 20, 24.

关键词： [1 2 4]Triazolo[3 4-a]isoquinolines Enaminones Hydrazonoyl Halides Cycloaddition Reactions Chitosan Thioanilides 3 4]Thiadiazolylisoquinoline Derivatives

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High prevalence of chronic viral hepatitis B and C in Minnesota Somalis contributes to rising hepatocellular carcinoma incidence

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World Journal of Gastroenterology 2022年第35期28卷 5217-5229页

作者： Essa A Mohamed Nasra H Giama Abubaker O Abdalla Hassan M Shaleh Abdul M Oseini hamdi A Ali Fowsiyo Ahmed Wesam Taha Hager Ahmed mohammed Jessica Cvinar Ibrahim A Waaeys Hawa Ali Loretta K Allotey Abdiwahab O Ali Safra A Mohamed William S Harmsen Eimad M Ahmmad Numra A Bajwa Mohamud D Afgarshe Abdirashid M Shire Joyce E Balls-Berry Lewis R Roberts Division of Gastroenterology and Hepatology Mayo ClinicRochesterMN 55905United States Center for Clinical and Translational Science Mayo ClinicRochesterMN 55905United States School of Nursing University of MinnesotaMinneapolisMN 55455United States Division of Digestive Diseases Emory School of MedicineAtlantaGA 30322United States Department of Laboratory Medicine and Pathology Mayo ClinicRochesterMN 55905United States Department of Internal Medicine NewYork-Presbyterian QueensFlushingNY 11355United States Department of Pediatrics University of Nevada Las VegasLas VegasNV 89154United States Department of Quantitative Health Sciences Mayo ClinicRochesterMN 55905United States Department of Medicine Gargar Urgent Care and ClinicMinneapolisMN 55406United States Office of the Director Shire ScientificMinneapolisMN 55405United States Department of Neurology Washington University School of Medicine in St LouisSt LouisMO 63130United States Knight Alzheimer Disease Research Center Washington University School of MedicineSt LouisMO 63130United States

BACKGROUND Chronic hepatitis B virus(HBV)and hepatitis C virus(HCV)infections are known risk factors for liver disease,cirrhosis and hepatocellular carcinoma(HCC).There is substantial global variation in HBV and HCV prevalence resulting in variations in cirrhosis and *** previously reported high prevalence of HBV and HCV infections in Somali immigrants seen at an academic medical center in *** To determine the prevalence of chronic viral hepatitis in Somali immigrants in Minnesota through a community-based screening *** We conducted a prospective community-based participatory research study in the Somali community in Minnesota in partnership with community advisory boards,community clinics and local mosques between November 2010 and December 2015(data was analyzed in 2020).Serum was tested for hepatitis B surface antigen,hepatitis B core antibody,hepatitis B surface antibody and anti-HCV *** Of 779 participants,15.4%tested positive for chronic HBV infection,50.2%for prior exposure to HBV and 7.6%for chronic HCV *** age-adjusted frequencies in males and females for chronic HBV were 12.5%and 11.6%;for prior exposure to HBV were 44.8%and 41.3%;and for chronic HCV were 6.7%and 5.7%,*** participants developed incident HCC during follow *** Chronic HBV and HCV are major risk factors for liver disease and HCC among Somali immigrants,with prevalence of both infections substantially higher than in the general United States ***-based screening is essential for identifying and providing health education and linkage to care for diagnosed patients.

关键词： Viral hepatitis Liver disease Community engagement African Immigrant health

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Gastric lipoma

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Open Journal of Gastroenterology 2012年第4期2卷 191-192页

作者： Hassan Seddik Aida Frej Fedoua Rouibaa Hassan En-Nouali Fatima-Zohra El hamdi Ahmed Benkirane Department of Gastroenterology I Military Teaching Hospital Mohammed V Rabat Morocco Department of Gastroenterology II Military Teaching Hospital Mohammed V Rabat Morocco Department of Radiology Military Teaching Hospital Mohammed V Rabat Morocco

Lipomas of the gastrointestinal tract are rare;gastric lipomas account for only 5% of all gastrointestinal lipomas. Although they are usually asymptomatic and detected incidentally, severe symptoms can occur with larger lesions, such as bleeding, abdominal pain or obstruction. Currently, accurate diagnosis of gastric lipoma can be reached with a combination of endoscopic and imaging diagnostic techniques, which constitutes a very useful precondition in choosing an appropriate management. We report a new case of a gastric lipoma diagnosed via abdominal CT scan and endoscopic ultrasound in a 63-year-old woman. Through this observation the authors discuss the contribution of morphological examinations in this disease whose diagnosis was made in the past on surgical specimen.

关键词： Stomach Lipoma

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