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Design of Miniature UWB-Based Antenna by Employing a Tri-Sectional SIR Feeder

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Computer Systems Science & Engineering 2022年第6期41卷 1157-1172页

作者： Ehab Dh.hussein Yaqeen S.Mezaal Oguz Bayat Electrical and Computer Engineering Department Altinbas UniversityIstanbulTurkey Medical Instrumentation Engineering Department Al-Esraa University CollegeBaghdadIraq

A novel ultra-wideband(UWB)-based microstrip antenna is presented in this work by using a slotted patch resonator,a tri-sectional stepped impedance resonator(SIR)feeder,as well as a reduced ground *** whole structure was realized on an FR4 *** impact of incorporating several cases of ground planes on the input reflection has been thoroughly investigated under the same tri-sectional SIR feeder and by employing a slotted patch *** the complete ground plane presents an inadequate frequency response,by reducing the ground plane,the induced UWB responses are apparent while the antenna exhibits higher impedance *** impact of both the uniform impedance resonator(UIR)as well as the SIR feeder on the input reflection has also been examined by following the same adopted reduced ground technique and using a slotted patch *** a result,the UIR feeder exhibits a dual-band frequency response,when a wide notched band is incorporated in the range from 4.5–6.5 *** dual-band response of the bi-sectional SIR feeder is still apparent with a narrower notched band in the frequency range from 4–5 *** far as the tri-sectional SIR feeder is concerned,the UWB response is discernible without recording the existence of a notched ***,the antenna displays a higher impedance bandwidth compared with the previously reported *** proposed antenna configuration is designed with highly compact dimensions and an overall size of 14×27.2 ***,it operates under the impedance bandwidth of 2.86–10.31 GHz that can be leveraged for numerous applications where wireless systems are *** approach presents several advantages compared with the other reported UWB-based antennas in the literature,whereas the measured S11 pattern is in good agreement with the simulated one.

关键词： Microstrip antenna reduced ground plane slotted patch radiator tri-sectional stepped impedance feeder ultra-wideband

Seismic Analysis of Reinforced Concrete Silos under Far-Field and Near-Fault Earthquakes

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Structural Durability & Health Monitoring 2022年第3期16卷 213-233页

作者： Anwer H.hussein Hussam K.Risan Department of Civil Engineering Al-Nahrain UniversityBaghdad10072Iraq

Silos are strategical structures used to stockpile various types of granular *** are highly vulnerable to earthquake excitation and have been frequently reported to fail at a higher rate than any other industrial *** seismic response of silos within the near-fault region will suffer a complex combination of loadings due to the unique characteristics of the near-fault ground motions;which are usually associated with a large amplitude pulse at the beginning of either the velocity or the displacement time *** study aims to numerically evaluate the seismic response of reinforced concrete cylindrical silos under near-fault ground motions(NFGM)and far-field ground motions(FFGM).The assessment investigates the impact of the slenderness ratio and the para-meters’influence on the seismic behavior of reinforced concrete *** validity of the Eurocode provisions in the structural safety of silos will also be *** nonlinear time history analysis is carried out through the finite element approach by examining four silos with different slenderness *** concrete damage plas-ticity model is assigned to the silo wall to simulate the nonlinear behavior of concrete in the plastic zone;while,the behavior of the stored material is represented by the Drucker-Prager plastic *** wall-granular material interaction is considered and defined by coulomb’s friction *** results of the near-fault records reveal a growth up to 72.8%in the hoop stress and 160.4%in the vertical stress compared to the far-field ***,the seismic response of reinforced concrete silos is highly sensitive to the type of ground motion,and slender silos tend to impose greater structural demand under the ***,The Eurocode-8 seismic provisions were adequate in the conventional far-field ground motions and less effective in the near-fault zone.

关键词： Silos seismic analysis near-fault earthquake far-field earthquake

Assessment of necessity of neuronavigation in localization of calvarial extra-axial lesions in the setting of limited resources

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Chinese Neurosurgical Journal 2022年第1期8卷 26-30页

作者： hussein Soffar Mohamed F.Alsawy Neurosurgery Department Kasr Alainy Faculty of MedicineCairo UniversityAl-Saray StreetEl ManialCairoEgypt

Background:Neuronavigation is a very beneficial tool in modern neurosurgical ***,the neuronavigation is not available in most of the hospitals in our country raising the question about its importance in localizing the calvarial extra-axial lesions and to what extent it is safe to operate without ***:We studied twenty patients with calvarial extra-axial lesions who underwent surgical *** lesions were preoperatively located with both neuronavigation and the usual linear *** methods were compared regarding the time consumed to localize the tumor and the accuracy of each method to anticipate the actual center of the ***:The mean error of distance between the planned center of the tumor and the actual was 6.50±1.762 mm in conventional method,whereas the error was 3.85±1.309 mm in IGS *** more time was consumed during the neuronavigation method including booting,registration,and positioning.A statistically significant difference was found between the mean time passed in the conventional method and IGS method(2.05±0.826,24.90±1.334,respectively),P-value<***:In the setting of limited resources,the linear measurement localization method seems to have an accepted accuracy in the localization of calvarial extra-axial lesions and it saves more time than neuronavigation method.

关键词： Calvarial Extra-axial Meningioma Neuronavigation Streotaxy

Evaluation of Shell and Tube Heat Exchanger Performance by Using ZnO/Water Nanofluids

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Journal of Harbin Institute of Technology(New Series) 2023年第6期30卷 62-69页

作者： hussein Hayder Mohammed Ali Adnan M hussein Kadum Mohammed Hussain Allami Barhm Mohamad Technical Engineering College/Kirkuk Northern Technical UniversityKirkuk 36001Iraq Computer Engineering Techniques Department Al-Kitab UniversityKirkuk 36001Iraq Department of Petroleum Technology Koya Technical InstituteErbil Polytechnic UniversityErbil 44001Iraq

To examine and investigate the impact of nanofluid on heat exchanger performance,including the total heat transfer,the effect of friction factor,the average Nusselt number,and the thermal efficiency,the output heat transfers of a shell and tube heat exchanger using ZnO nanoparticles suspended in water has been conducted *** governing equations were solved using finite volume techniques and CFD simulations with ANSYS/FLUENT Solver *** nanoparticles volume fractions adopted are 0.2%and 0.35%that used in numerical computations under 200 to 1400 Reynolds numbers *** increasing of temperature is approximately 13%from the bottom to the top of heat exchanger,while the maximum enhancement of Nusselt number is about 10%,19%for volume fractions 0.2%and 0.35%*** elevated values of the friction factor at the volumetric ratios of 0.2%and 0.35%are 0.25%and 0.47%*** findings demonstrate that the performance efficiency of shell and tube heat exchanger is enhanced due to the increase in Nusselt number.

关键词： CFD Reynold number thermal efficiency Nusselt number nanofluid heat exchanger

Review:Solar Still with Additional Condenser

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Journal of Harbin Institute of Technology(New Series) 2023年第3期30卷 60-67页

作者： Azad A.hussein Najim Abid Jassim Mechanical Engineering Department Engineering CollegeUniversity of BaghdadBaghdad 10011Iraq

Getting consumable water to individuals has been a continuous challenge *** or non⁃purified water sources are responsible for the bulk of human *** demand for water purification that does not harm the biological system is ***⁃based desalination is one of the effective water purification methods creating ultra⁃pure refined ***⁃based still refining frameworks offer maintainable devices for a freshwater *** plans were tried by analysts to move forward the efficiency of sun⁃powered *** to the experiments,solar still coordinates outside or inside the condenser is considered to be a valid and successful *** survey hopes to show,explain,and study the performance of several solar stills combined with diverse condenser designs.

关键词： solar still desalination condenser renewable energy distillate yield

Course Evaluation Based on Deep Learning and SSA Hyperparameters Optimization

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Computers, Materials & Continua 2022年第4期71卷 941-959页

作者： Alaa A.El-Demerdash Sherif E.hussein John FW Zaki Department of Computer and Systems Faculty of EngineeringMansoura UniversityMansoura35516Egypt

Sentiment analysis attracts the attention of Egyptian Decisionmakers in the education *** offers a viable method to assess education quality services based on the students’feedback as well as that provides an understanding of their *** machine learning techniques offer automated strategies to process big data derived from social media and other digital channels,this research uses a dataset for tweets’sentiments to assess a few machine learning *** dataset preprocessing to remove symbols,necessary stemming and lemmatization is performed for features *** is followed by several machine learning techniques and a proposed Long Short-Term Memory(LSTM)classifier optimized by the Salp Swarm Algorithm(SSA)and measured the corresponding ***,the validity and accuracy of commonly used classifiers,such as Support Vector Machine,Logistic Regression Classifier,and Naive Bayes classifier,were ***,LSTM based on the SSA classification model was compared with Support Vector Machine(SVM),Logistic Regression(LR),and Naive Bayes(NB).Finally,as LSTM based SSA achieved the highest accuracy,it was applied to predict the sentiments of students’feedback and evaluate their association with the course outcome evaluations for education quality purposes.

关键词： Sentiment analysis course evaluation deep learning Bi-LSTM opinion mining students feedback natural language processing machine learning tweets analysis SSA

Semi-closed synthesis of nitrogen and oxygen Co-doped mesoporous carbon for selective aqueous oxidation

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Green Energy & Environment 2022年第1期7卷 43-52页

作者： Chen Xing Daihui Yang Yan Zhang Tian Sun Junfei Duan hussein A.Younus Shiguo Zhang College of Materials Science and Engineering Hunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan UniversityChangsha410082China School of Materials Science and Engineering Changsha University of Science and TechnologyChangsha410004China Chemistry Department Faculty of ScienceFayoum UniversityFayoum63514Egypt

Heteroatom-doped meso/micro-porous carbon materials are conventionally produced by harsh carbonization under an inert atmosphere involving specific precursors,hard/soft templates,and heteroatom-containing ***,we report a facile synthesis of N and O co-doped meso/micro-porous carbon(NOMC)by template-free carbonization of a small-molecule precursor in a semi-closed *** semi-closed carbonizaiton process yields hydrophilic NOMCs with large surface area in a high *** porous structure as well as the elemental composition of NOMCs can be modulated by changing the holding time at a particular *** as metal-free heterogeneous catalysts can selectively oxidize benzyl alcohol and its derivatives into aldehydes/ketones with>85%conversion in aqueous solution,which is much higher than that of the control sample obtained in tube furnace(21%conversion),mainly due to their high N content,high percentage of pyridinic N,and large surface *** presence of O-containing moieties also helps to improve the hydrophilicity and dispersion ability of catalysts and thus facilitates the mass transfer process during aqueous *** NOMC catalysts also dispayed excellent activity for a wide range of substrates with a selectivity of>99%.

关键词： Semi-closed carbonization Nitrogen and oxygen doping Mesoporous carbon Metal-free catalyst Selective aqueous oxidation

Screening of Myocardial Cardiotoxicity Induced by Anticancer Chemotherapy and the Importance of Global Longitudinal Strain

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World Journal of Cardiovascular Diseases 2024年第6期14卷 381-391页

作者： Marguerite Téning Diouf Fatou Aw hussein Khadra Sophie Ba Doudou Diouf Michel Ngonar Sarr Joseph Salvador Mingou Malick Ndiaye Simon Antoine Sarr Momar Dioum Aliou Alassane Ngaide Serigne Mor Beye Simon Manga Alain Affangla Youssou Diouf Khadimu Rassoul Diop Malick Bodian Mohamed Leye Mouhamadou Bamba Ndiaye Alassane Mbaye Adama Kane Maboury Diao Abdoul Kane Cardiology Department of the Dalal Jamm Hospital Dakar Senegal Cardiology Department Hospital Aristide Le Dantec Dakar Senegal Cardiology Department Hospital Fann Dakar Senegal UFR2S Saint Louis Saint Louis Senegal UFR Ziguinchor Ziguinchor Senegal Training and Research in Health Sciences Unit University of Thies Thies Senegal Cardiology Department Hospital General Idrissa Pouye Dakar Senegal

Introduction: The improvement of survival in patients with cancer and the expansion of therapeutic options have led to the emergence of a new profile of cardiotoxicity, specifically associated with antimitotic agents. Our study aimed to assess the incidence of chemotherapy-induced myocardial toxicity in patients with cancer. Patients and Methods: We conducted a looking-forward longitudinal cohort study including all patients admitted to the Cardiology departments of Aristide le Dantec Hospital and Dalal Jamm National Hospital Centre for apre-chemotherapy check-up. The included patients did not undergo any pre-existing cardiopathy. Results: Over a period of two years ranging from January 2019 to December 2021, a total of 37 patients were included in the study. Notably, there was a female predominance (92%) with an average age of 49.7 years ± 13.69. Breast cancer accounted for 70% of the neoplasms. Laboratory findings revealed moderate anemia in 19 patients (51%). At inclusion, the left ventricle (LV) was of normal size (LV diastole at 44.46 ± 4.97 mm). The systolic function of the left ventricle was normal in all patients, with an average ejection fraction (EF) of 63.1% ± 5.80 and a mean global longitudinal strain (GLS) of −20.4% ± 2.58. The most commonly used agents were anthracyclines. During follow-up, 3 patients (8.1%) developed clinical symptoms of left heart failure, and LV dysfunction on echocardiography was observed in 5 (13.5%) patients, with a significant decrease in EF Conclusion: The incidence of cardiac toxicity is not negligible, hence the importance of early screening. Strain imaging is an essential tool that should be performed as part of the assessment before chemotherapy and re-evaluated during treatment.

关键词： Cancer Chemotherapy Global Longitudinal Strain Cardiotoxicity

The stellar system HIP 101227:is it a binary,a triple or a quadruple system?

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Research in Astronomy and Astrophysics 2021年第5期21卷 121-129页

作者： Zahra Talal yousef Adlyka Annuar Abdallah Mohammad hussein Hamid Al-Naimiy MashhoorAl-Wardat Nurul Shazana Abdul Hamid Mohammed Fadil Talafha Department of Applied Physics Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia Department of Physics Al al-Bayt UniversityMafraq 25113Jordan Department of Applied Physics and Astronomy University of SharjahP.O.Box 27272 SharjahUnited Arab Emirates Sharjah Academy for Astronomy Space Sciences and Technology SAASSTUniversity of SharjahP.O.Box 27272 SharjahUnited Arab Emirates

In this paper,we present the analysis of the stellar system HIP 101227 to determine the actual number of components in the system,and their *** use dynamical modeling and complex spectrophotometric(involving atmospheric modeling)techniques with recent data,to determine the physical properties and orbital solution for the system,respectively,with better accuracy than past *** on our analysis,we found that the system is more consistent with being a quadruple rather than a binary or a triple system as suggested by previous *** total mass of the system determined from our SED analysis is 3.42±0.20 M,which is distributed almost equally between the four *** stars are found to be zero-age main sequence stars;i.e.,at the last stage of pre-main sequence,with age less than 200 Myr and spectral types *** four stars have very similar physical characteristics,suggesting that the fragmentation process is the most likely theory for the formation and evolution of the system.

关键词： stars:binaries:close stars:binaries:visual stars:individual:HIP 101227