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A Dynamic Management Scheme for Internet of Things(IoT)Environments:Simulation and Performance Evaluation

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Computer Modeling in Engineering & Sciences 2022年第12期133卷 673-695页

作者： omar Said Department of Information Technology College of Computers and Information TechnologyTaif UniversityP.O.Box 11099Taif21944Saudi Arabia

In recent years,the Internet of Things(IoT)technology has been considered one of the most attractive fields for researchers due to its aspirations and implications for society and life as a *** IoT environment contains vast numbers of devices,equipment,and heterogeneous users who generate massive amounts of ***,things’entry into and exit fromIoT systems occur dynamically,changing the topology and content of IoT networks very ***,managing IoT environments is among the most pressing *** paper proposes an adaptive and dynamic scheme for managing IoT environments is *** management scheme depends on the use of previous management methodologies,considering two main *** first factor is network status,which is determined in *** second factor is a management method’s suitability according to its desired *** test the proposed management scheme,a simulation environment is created using *** metrics used to measure the management scheme performance are bandwidth consumption,energy consumption,packet loss,throughput,delay,usage rate of individualmanagement techniques,and *** simulation results prove that the proposed management scheme outperformed the individual 6LowPANSNMP,CoAP,and LWM2M management schemes.

关键词： Internet of Things IoT management IoT simulation SNMP neural networks big data

A Hybrid Model Using Bio-Inspired Metaheuristic Algorithms for Network Intrusion Detection System

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Computers, Materials & Continua 2021年第7期68卷 409-429页

作者： omar Almomani Department of Computer Network and Information Systems The World Islamic Sciences and Education UniversityAmman11947Jordan

Network Intrusion Detection System(IDS)aims to maintain computer network security by detecting several forms of attacks and unauthorized uses of applications which often can not be detected by *** features selection approach plays an important role in constructing effective network *** bio-inspired metaheuristic algorithms used to reduce features to classify network traffic as abnormal or normal traffic within a shorter duration and showing more ***,this paper aims to propose a hybrid model for network IDS based on hybridization bio-inspired metaheuristic algorithms to detect the generic *** proposed model has two objectives;The first one is to reduce the number of selected features for Network *** objective was met through the hybridization of bioinspired metaheuristic algorithms with each other in a hybrid *** algorithms used in this paper are particle swarm optimization(PSO),multiverse optimizer(MVO),grey wolf optimizer(GWO),moth-flame optimization(MFO),whale optimization algorithm(WOA),firefly algorithm(FFA),and bat algorithm(BAT).The second objective is to detect the generic attack using machine learning *** objective was met through employing the support vector machine(SVM),C4.5(J48)decision tree,and random forest(RF)***-NB15 dataset used for assessing the effectiveness of the proposed hybrid ***-NB15 dataset has nine attacks *** generic attack is the highest among ***,the proposed model aims to identify generic *** data showed that J48 is the best classifier compared to SVM and RF for the time needed to build the *** terms of features reduction for the classification,my data show that the MFO-WOA and FFA-GWO models reduce the features to 15 features with close accuracy,sensitivity and F-measure of all features,whereas MVO-BAT model reduces features to 24 features with the same accuracy,sensitivity and F-measure of all features for all classifiers.

关键词： IDS metaheuristic algorithms PSO MVO GWO MFO WOA FFA BAT SVM J48 RF UNSW-NB15 dataset

Seroprevalence of SARS-COV-2 Exposure among “High-Risk” Populations (Healthcare Workers, People Who Attend Markets, and School Children) in Zanzibar

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Advances in Infectious Diseases 2024年第1期14卷 34-55页

作者： Ame Masemo Solomon Mwakasungula Khamis Kheir Erick Mgina Nahya Khamis Irabi Kassim Bihila Bakar Khamis Salim Sarah Mswata Kibwana omar Theckla Kazimoto Linzy Elton Honorati Masanja Mayassa Ally Zanzibar Health Research Institute Binguni Zanzibar Ifakara Health Institute Bagamoyo Tanzania National Institute for Medical Research Muhimbili Centre Dar es Salaam Tanzania Binguni Public Health Laboratory Binguni Zanzibar Department of Microbiology Mnazi Mmoja Hospital Stone Town Zanzibar Centre for Clinical Microbiology Royal Free Hospital Campus University College London London UK

In Zanzibar, from the start of the pandemic in March 2020 to the time of sampling in December 2020, SARS-CoV-2 seroprevalence data was limited. We conducted a seroprevalence study to evaluate the magnitude of SARS-CoV-2 exposure among healthcare workers, school children, and people who attended general markets in Zanzibar. The objectives of the study were to analyse the total antibodies from selected higher-risk population groups in order to determine magnitude in SARS CoV-2 exposure. Blood samples were collected from eligible and consented participants (adults and children), and their serum was analyzed for total antibodies against SARS-CoV-2 using ELISA. A questionnaire was used to collect participants’ demographic and clinical data. The overall SARS-CoV-2 seroprevalence across all age groups was 33%, and a higher seroprevalence was observed in the 40 - 49 years’ age group relative to other ages as well as in those who attended markets. A runny nose (18.8% of participants) was the most frequently reported SARS-CoV-2 infection-related symptom. Multivariable analysis showed significantly higher odds of infection in people living in urban districts. The findings provide insight into SARS-CoV-2 infection among school children, health workers, and people who attended markets in Zanzibar in the early stages of the pandemic. Exposure in these groups might have been influenced by infection and prevention strategies taken by the government, as well as shopping behavior, school overcrowding, and population density in urban settings. The study had methodological limitations, including cross-sectional design. Further, well-designed, longitudinal studies are recommended to understand exposure and transmission at a population level.

关键词： SARS-CoV-2 Seroprevalence Zanzibar ELISA COVID-19

Colon Adenocarcinoma in a Retrograde Intussusception: A Case Report and Literature Review

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Open Journal of Gastroenterology 2024年第5期14卷 153-160页

作者： Carlos Hernández Brito Pedro Arredondo Ruiz Brenda Paola Sáenz Dávila Arsenio Torres Delgado Luis Eduardo Méndez Turrubiates Luis Ángel Amezcua Toledo omar Josué Herrera López Surgical Oncology Department Centro Oncol&#243gico Onkolid Veracruz Mexico Clinical Oncology Department Centro Oncol&#243gico Onkolid Veracruz Mexico General and Laparoscopic Surgery Corporativo M&#233dico-Quir&#250rgico Torres Veracruz Mexico Radiation Oncology Department Centro Oncol&#243gico Onkolid Veracruz Mexico Radiology Department Centro Oncol&#243gico Onkolid Veracruz Mexico Anatomical Pathology Department Centro Oncol&#243gico Onkolid Veracruz Mexico

Background: Intussusception is defined as a telescoping of a proximal gastrointestinal segment with its mesentery to a distal one, only 5% occur in adults and in colon the probability that it is caused by a malignant disease is up to 65%. Only 1% occurs in a retrograde manner, the rest occur in an anterograde manner. Aim: Describe the clinical presentation of an intussusception in the adult patient as well as its most frequent causes and possible complications that influence decision making for a definitive treatment. Case Presentation: A 66-year-old woman diagnosed with colon adenocarcinoma who underwent elective transverse colectomy and colonic anastomosis with an incidental finding of a transverse colon tumor in a retrograde intussusception was studied. Conclusion: In any adult patient with an intussusception especially in colon a neoplasia should be suspected and the affected segment should be resected without being reduced due to the risk of perforation and tumor dissemination.

关键词： Colon Cancer Colon Adenocarcinoma Colonic Intussusception Intussusception

Prevalence of Depression and Anxiety in Patients with Autoimmune Disease: A Comparative Study with a Diabetic Population

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Open Journal of Internal Medicine 2024年第2期14卷 159-166页

作者： Michel Assane Ndour Mouhamed Dieng omar Boun Khatab Diouf Léon Birwe Boundia Djiba Ibrahima Mané Diallo Matar Ndiaye Nousradine Mourno Tarsa Djiby Sow Anna Sarr Demba Diedhiou Maimouna Ndour Mbaye Service de Mdecine Interne Centre Hospitalier Abass Ndao Dakar Senegal Service de Mdecine Interne Centre Hospitalier Aristide Le Dantec Dakar Senegal

Introduction: Systemic diseases are a variety of heterogeneous autoimmune and/or autoinflammatory diseases and syndromes usually affecting multiple systems and resulting from immune system dysregulation. We evaluated risk factors for depression and anxiety in an autoimmune disease cohort compared with diabetic patients. Patients and Methods: We conducted an observational, cross-sectional, case-control survey comparing two groups: individuals with connective tissue disease (CTD) and diabetic controls who were followed within three Dakar University hospitals during the period from April to June 2023. Results: The sample comprised 106 participants, of whom 51 (48%) had CTD and 55 (52%) served as diabetic controls. In the CTD group, the majority had lupus (19) and rheumatoid arthritis (23). The CTD patients had a mean age of 41.0 years (SD 16.9), while the diabetic patients had a mean age of 55.9 years (SD 11.7), with a significant difference observed (p Conclusion: Compared to a chronic disease, devastating in Africa and evolving over the long term, autoimmune diseases are more strongly and more frequently associated with anxiety and depression. This is a factor to be taken into account in the holistic management of these patients.

关键词： Connective Tissue Disease Lupus Rhumatoid Arthritis Diabetes Depression Anxiety Disability

Sero-Prevalence and Risk factors of Contagious Bovine Pleuropneumonia (CBPP) in Afgoye District Lower Shabelle Region, Somalia

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Open Journal of Veterinary Medicine 2024年第2期14卷 11-20页

作者： Ahmed Mohamed Ahmed Sumaya Hassan Ali Abdisalam Mohamed Ali Abdirazack Saleban Osman Binti Abubakar Mohamed Abdifatah Mohamud Ibar Shafii Abdullahi Mohamed Mohamed Abdelrahman Mohamed Ahmed Ali omar Zakaria Ibrahim Issack College of Veterinary Medicine Abrar University Mogadishu Somalia Faculty of Veterinary Medicine and Animal Husbandry Somali National University Mogadishu Somalia Faculty of Veterinary Science Benadir University Mogadishu Somalia

Contagious bovine Pleuropneumonia (CBPP) is an infectious and highly contagious respiratory disease of cattle and water buffalo, caused by the Mycoplasma mycoides subspecies mycoides. It induces significant economic losses and leads to a severe livestock production problem, negatively influencing people’s livelihoods of affected countries. In Somalia, there is no updated data on the prevalence and distribution of the disease. Hence, a descriptive cross-sectional study was conducted from September 2022 to June 2023 in different villages under the Afgoye District of lower Shabelle region, Somalia. The main purpose of this study is to assess the sero-prevalence and identify the associated risk factors for the occurrence of the disease. In this study, villages, age, sex, breed, and body condition were considered as risk factors. A total of 90 blood samples were collected and tested in the laboratory using the Anti-CBPP Elisa kit test. Out of 90 serum samples from herd cattle, 32 were positive, resulting in an overall prevalence of 35.5%. In addition, we found a statistically significant variation between the prevalence of the disease and factors such as sex, age, body condition and breeds. In summary, the overall prevalence of Contagious bovine pleuropneumonia in this study area is worth to be considered because there is a low quality of health care and less awareness of the Contagious bovine Pleuropneumonia effects on herds, which warrants the official authorities to act and follow appropriate preventive and control measures to reduce the incidence of the disease and generate appropriate controlling and prevention measures in all regions of Somalia.

关键词： Contagious Bovine Pleuropneumonia Sero-Prevalence Cattle Somalia Mycoplasma Cross Sectional Study

Evaluation of the 8th AJCC staging system for pathologically versus clinically staged pancreatic adenocarcinoma: A time to revisit a dogma?

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Hepatobiliary & Pancreatic Diseases International 2018年第1期17卷 64-69页

作者： omar Abdel-Rahman Clinical Oncology Department Faculty of Medicine Ain Shams University

Background: The 8 th edition of the American Joint Committee on Cancer(AJCC) staging system for pancreatic exocrine adenocarcinoma has been released. The current study seeks to assess the 7 th and 8 th editions among patients registered within the surveillance, epidemiology and end results(SEER) ***: SEER database(2010–2013) has been accessed through SEER*Stat program and AJCC 8 th edition stages were reconstructed utilizing the collaborative stage descriptions. Kaplan–Meier analysis of overall survival and pancreatic cancer-specific survival analyses(according to both 7 th and 8 th editions and according to whether pathological or clinical staging were conducted) has been performed. Multivariate analysis of factors affecting pancreatic cancer-specific survival was also conducted through a Cox proportional hazard ***: A total of 18 948 patients with pancreatic adenocarcinoma were identified in the period from 2010–2013. Pancreatic cancer-specific survival among pathologically staged patients and according to the 8 th edition showed significant differences for all pair wise comparisons among different stages(P < 0.0001) except for the comparison between stage IA and stage IB(P = 0.307) and the comparison between stage IB and stage IIA(P = 0.116). Moreover, P value for stage IA vs IIA was 0.014; while pancreatic cancer-specific survival according to the 7 th edition among pathologically staged patients showed significant differences for all pair wise comparisons among different stages(P < 0.0001) except for the comparison between IA and IB(P = 0.072), the comparison between stage IIA and stage IIB(P = 0.065), the comparison between stage IIA and stage Ⅲ(P = 0.059) and the comparison between IIB and Ⅲ(P = 0.595).Among clinically staged patients(i.e. those who did not undergo initial radical surgery), the prognostic performance of both 7 th and 8 th stages for both overall survival and pancreatic cancer-specific survival was ***: Th

关键词： Pancreatic cancer AJCC SEER Prognosis

Design of a Novel THz Modulator for B5G Communication

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Computers, Materials & Continua 2022年第10期73卷 1055-1066页

作者： omar A.Saraereh Department of Electrical Engineering Faculty of EngineeringThe Hashemite UniversityZarqa13133Jordan

Wireless data traffic has expanded at a rate that reminds us of Moore’s prediction for integrated circuits in recent years,necessitating ongoing attempts to supply wireless systems with ever-larger data rates in the near future,despite the under-deployment of 5G ***(THz)communication has been considered a viable response to communication blackout due to the rapid development of THz technology and *** communication has a high frequency,which allows for better *** is a fast expanding and evolving industry,driven by an increase in wireless traffic volume and data transfer speeds.A THz modulator based on a hybrid metasurface was devised and built in this *** device’s modulation capabilities were modelled and proved *** electrolyte is an ion-gel medium implanted between graphene and metasurface,and the active material is *** the metasurface,the interaction between the THz wave and graphene is ***,an external bias voltage was employed to actively regulate the THz waves by tuning the electrical conductivity of *** results show that with a minimal bias voltage,the device can achieve a modulation depth of up to 73%at the resonant ***,during the modulation process,the resonance frequency remains almost *** a result,the proposed gadget offers a unique tool for substantial THz amplitude modulation at low voltages.

关键词： Terahertz communication modulator metasurface graphene

Design and Analysis of Novel Antenna for Millimeter-Wave Communication

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Computer Systems Science & Engineering 2022年第10期43卷 413-422页

作者： omar A.Saraereh Department of Electrical Engineering Engineering FacultyThe Hashemite UniversityZarqa13133Jordan

At present,the microwave frequency band bandwidth used for mobile communication is only 600 *** 2020,the 5G mobile Communication required about 1 GHz of bandwidth,so people need to tap new spectrum resources to meet the development needs of mobile Internet traffic that will increase by 1,000 times in the next 10 *** the potentially large bandwidth(30∼300 GHz)of the millimeter wave frequency band to provide higher data rates is regarded as the potential development trend of the future wireless communication technology.A microstrip patch implementation approach based on electromagnetic coupling feeding is presented to increase the bandwidth of a dual-polarized millimeter-wave *** extend the antenna unit's impedance bandwidth,coplanar parasitic patches and spatial parallel parasitic patches are used,and a 22 sub-array antenna is developed using paired inverse feed *** standing wave at the centre frequency of 37.5 GHz is less than 2 *** antenna array's relative bandwidth is 6.13 percent,the isolation is>30 dB,the cross-polarization is−23.6 dB,and the gain is 11.5 dBi,according to the *** proposed dual-polarized microstrip antenna has the characteristics of wide frequency bandwidth,large port isolation,low cross-polarization,and high *** antenna performance meets the general engineering requirements of millimeter-wave dual-polarized antennas.

关键词： Millimeter-wave antenna metamaterial electromagnetics wireless communication