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Unraveling the nature of sensing in electrostatic mEmS gas sensors

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microsystems & Nanoengineering 2024年第3期10卷 109-117页

作者： Yasser S.Shama Sasan Rahmanian Hamza mouharrar Rana abdelrahman Alaaeldin Elhady Eihab m.Abdel-Rahman Systems Design Engineering University of Waterloo200 University Ave WWaterloo N2L 3G1 ONCanada mechanical Engineering Benha Faculty of EngineeringBenha UniversityBenha 13511Egypt

This paper investigates the fundamental sensing mechanism of electrostatic mEmS gas *** compares among the responsivities of a set of mEmS isopropanol sensors before and after functionalization,and in the presence and absence of electrostatic fields when operated in static and dynamic detection *** the static mode,we found that the sensors do not exhibit a measurable change in displacement due to added *** the other hand,bare sensors showed a clear change in displacement in response to isopropanol *** the dynamic mode,functionalized sensors showed a measurable frequency shift due to the added mass of isopropanol *** the presence of strong electrostatic fields,the measured frequency shift was found to be threefold larger than that in their absence in response to the same concentration of isopropanol *** enhanced responsivity of dynamic detection allows the sensors to measure the vapor mass captured by the functional material,which is not the case for static *** detection of isopropanol by bare sensors in static mode shows that change in the medium permittivity is the primary sensing *** enhanced responsivity of dynamic mode sensors when operated in strong electrostatic fields shows that their sensing mechanism is a combination of a weaker added mass effect and a stronger permittivity *** findings show that electrostatic mEmS gas sensors are independent of the direction of the gravitational field and are,thus,robust to changes in *** is erroneous to refer to them as‘gravimetric’sensors.

关键词： mechanism. electrostatic measurable

Dysprosium oxide,alumina,and graphene oxide reinforced polycaprolactone thin films:Thermal stability,morphology,and cell viability

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Journal of Rare Earths 2024年第7期42卷 1337-1343,I0005页

作者： mohamed Tharwat Elabbasy mohamed R.Atteya mai A.Samak mousa abdelrahman Tahani Almahmoud m.A.El-morsy A.A.menazea m.F.H.Abd El-Kader Department of Public Health College of Public Health and Health InformaticsUniversity of Ha'ilHa'il2440Saudi Arabia Food Control Department Faculty of Veterinary MedicineZagazig UniversityZagazig44519Egypt Department of Physical Therapy College of Applied Medical SciencesUniversity of Ha'ilHa'ilSaudi Arabia Department of Histology and Cell Biology Faculty of MedicineZagazig UniversityZagazig44519Egypt College of Nursing University of Ha'ilHa'ilSaudi Arabia College of Science and Humanities in Al-Kharj Physics DepartmentPlasma Technology and Material Science UnitPrince Sattam Bin Abdulaziz UniversityAl-kharj11942Saudi Arabia Physics Department Faculty of ScienceUniversity of DamiettaNew Damietta34517Egypt Spectroscopy Department Physics Research InstituteNational Research CentreDokki12622GizaEgypt Biophysics Department Faculty of ScienceCairo UniversityGizaEgypt

Developing a biomaterial for wound healing applications is still a ***,dysprosium oxide(Dy_(2)O_(3)),aluminum oxide(Al_(2)O_(3)),and graphene oxide(GO)were embedded in cast films based on polycaprolactone(PCL)to be examined for wound dressing *** techniques were used to characterize the fabricated films including X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),Raman,and scanning electron microscopy(SEm),besides their biological *** thermogravimetric analysis(TGA)exhibits high thermal stability as the scaffold weight decreases slightly to 98.6%after raising the temperature from room temperature to 280℃.The cell viability was investigated and it is shown that the viable cells grow up to approximately 93%at 75μg/***,the cell attachment shows excellent behavior as the cells attach on most of the surface of the modified PCL which shows high biocompatibility.

关键词： Wound healing Polycaprolactone Dy_(2)O_(3) Al_(2)O_(3) Biocompatible Rare earths

赛德西港用于船舶减排的陆上可再生能源供电评估

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哈尔滨工程大学学报（英文版） 2024年第2期23卷 506-524页

作者： merna makram Ameen m.Bassam Adel A.Tawfik Waleed Yehia Naval Architecture and marine Eng.Dept. Faculty of EngineeringPort Said UniversityPort Fuad 42526Egypt

Air pollution from shipping is becoming a critical issue,particularly in dense hub port *** proposed solution to minimize ship-based emissions at ports is the implementation of an Onshore Power Supply(OPS)*** allows ships to shut off their auxiliary engines and instead connect to the port *** there have been numerous studies conducted on ports in Europe and the United States,little research has been done on Egyptian ***,this paper aims to investigate the feasibility of implementing OPS at Port Said West Port in Egypt,aligning with Egypt Vision 2030’s goals for addressing climate *** research primarily focuses on analyzing data collected from calling ships to generate socio-economic and cost-effectiveness analyses of *** further enhance the environmental benefits of OPS,the paper proposes the use of solar energy as the OPS electricity *** findings of the study revealed that by relying on the national grid,emissions can be reduced by 28%.moreover,it is predicted that this reduction could reach 100%if electricity generation is solely based on solar ***,the economic analysis demonstrates promising profitability,with a payback period of approximately two years.

关键词： Onshore power supply Port sustainability Shipping emissions inventory Solar energy Photovoltaic systems

Evaluation of hybrid closed-loop insulin delivery system in type 1 diabetes in real-world clinical practice:One-year observational study

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World Journal of Diabetes 2024年第3期15卷 455-462页

作者： Ahmed Eldib Shilton Dhaver Karim Kibaa Astrid Atakov-Castillo Tareq Salah marwa Al-Badri abdelrahman Khater Ryan mcCarragher Omnia Elenani Elena Toschi Osama Hamdy Department of Clinical Behavioral&Outcomes ResearchJoslin Diabetes CenterBostonMA 02215United States Department of medicine Harvard Medical SchoolBostonMA 02115United States

BACKGROUND In 2016,the Food and Drug Administration approved the first hybrid closed-loop(HCL)insulin delivery system for adults with type 1 diabetes(T1D).There is limited information on the impact of using HCL systems on patient-reported outcomes(PROs)in patients with T1D in real-world clinical *** this independent study,we evaluated glycemic parameters and PROs over one year of continuous use of medtronic’s 670G HCL in real-world clinical *** To assess the effects of hybrid closed loop system on glycemic control and quality of life in adults with *** We evaluated 71 patients with T1D(mean age:45.5±12.1 years;59%females;body weight:83.8±18.7 kg,body mass index:28.7±5.6 kg/m2,A1C:7.6%±0.8%)who were treated with HCL at Joslin Clinic from 2017 to *** measured A1C and percent of glucose time-in-range(%TIR)at baseline and 12 *** measured percent time in auto mode(%TiAm)for the last two weeks preceding the final visit and assessed PROs through several validated quality-of-life surveys related to general health and diabetes *** At 12 mo,A1C decreased by 0.3%±0.1%(P=0.001)and%TIR increased by 8.1%±2.5%(P=0.002).The average%TiAm was only 64.3%±32.8%and was not associated with A1C,%TIR or ***,provided at baseline and at the end of the study,showed that the physical functioning submodule of 36Item Short-Form Health Survey increased significantly by 22.9%(Pmia fear survey/worry scale decreased significantly by 24.9%(Pm Areas In Diabetes reduced significantly by-17.2%(P=0.002).The emotional burden submodules of dietary diversity score reduced significantly by-44.7%(P=0.001).Furthermore,analysis of Clarke questionnaire showed no increase in awareness of hypoglycemic ***-5 showed no improvements in subject’s wellbeing among participants after starting the 670G HCL ***,analysis of Pittsburgh Sleep Quality Index showed no difference in sleep quality,sleep latency,or duration o

关键词： Artificial pancreas Continuous blood glucose monitor Type 1 diabetes Hybrid closed-loop insulin delivery Quality of life

Extensive Study of Cloud Computing Technologies, Threats and Solutions Prospective

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Computer Systems Science & Engineering 2022年第4期41卷 225-240页

作者： mwaffaq Abu-Alhaija Nidal m.Turab abdelrahman Hamza Department of Networks and Information Security Faculty of Information TechnologyAl-Ahliyya Amman UniversityAmman19328Jordan Department of Computer Science Information TechnologyAl-Ahliyya Amman UniversityAmman19328Jordan

Infrastructure as a Service(IaaS)provides logical separation between data,network,applications and machines from the physical constrains of real *** is one of the basis of cloud ***,security issues are also gradually emerging with virtualization of cloud *** security aspects of cloud virtualization will be explored in this research paper,security recognizing potential threats or attacks that exploit these vulnerabilities,and what security measures are used to alleviate such *** addition,a dis-cussion of general security requirements and the existing security schemes is also *** shown in this paper,different components of virtualization environ-ment are targets to various attacks that in turn leads to security issues compromis-ing the whole cloud *** this paper an overview of various cloud security aspects is also *** attack scenarios of virtualization envir-onments and security solutions to cater these attacks have been discussed in the *** then proceed to discuss API security concerns,data security,hijacking of user account and other security *** aforementioned discussions can be used in the future to propose assessment criteria,which could be useful in ana-lyzing the efﬁciency of security solutions of virtualization environment in the face of various virtual environment attacks.

关键词： Cloud computing environment paravirtualization full virtualization cloud virtualization security hypervisor virtual machines

Emerging small-molecule therapeutic approaches for Alzheimer's disease and Parkinson's disease based on targeting microRNAs

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Neural Regeneration Research 2022年第2期17卷 336-337页

作者： Somaya A.abdelrahman moustafa T.Gabr Department of medicinal Chemistry Faculty of PharmacyMansoura UniversityMansouraEgypt Department of Radiology Stanford University School of MedicineStanfordCAUSA

The role of micro RNAs in the progression of neurodegenerative diseases: micro RNAs(mi RNAs) are endogenous, non-coding and short RNA nucleotides that regulate gene expression through base pairing with the targeted me... 详细信息

关键词： endogenous Alzheimer diseases

Effective Hybrid Content-Based Collaborative Filtering Approach for Requirements Engineering

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Computer Systems Science & Engineering 2022年第1期40卷 113-125页

作者： Qusai Y.Shambour abdelrahman H.Hussein Qasem m.Kharma mosleh m.Abualhaj Faculty of Information Technology Al-Ahliyya Amman UniversityAmman19328Jordan

Requirements engineering(RE)is among the most valuable and critical processes in software *** quality of this process significantly affects the success of a software *** important step in RE is requirements elicitation,which involves collecting project-related requirements from different *** of reusable requirements are typically important sources of an increasing number of reusable software ***,the process of searching such repositories to collect valuable project-related requirements is time-consuming and difficult to perform *** systems have been widely recognized as an effective solution to such ***,this study proposes an effective hybrid content-based collaborative filtering recommendation *** proposed approach will support project stake-holders in mitigating the risk of missing requirements during requirements elicitation by identifying related requirements from software requirement *** experimental results on the RALIC dataset demonstrate that the proposed approach considerably outperforms baseline collaborative filtering-based recom-mendation methods in terms of prediction accuracy and coverage in addition to mitigating the data sparsity and cold-start item problems.

关键词： Requirements engineering recommender systems requirements elicitation collaborative filtering content-based filtering

A Systematic Approach for Exploring Underground Environment Using LiDAR-Based System

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Computer modeling in Engineering & Sciences 2023年第9期136卷 2321-2344页

作者： Tareq Alhmiedat Ashraf m.marei Saleh Albelwi Anas Bushnag Wassim messoudi abdelrahman Osman Elfaki Industrial Innovation&Robotics Center University of TabukTabuk71491Saudi Arabia Faculty of Computers&Information Technology University of TabukTabuk71491Saudi Arabia

Agricultural projects in different parts of the world depend on underground water ***,there have been many unfortunate incidents inwhich children have died in abandoned *** topographical information for these wells is a prerequisite to protecting people from the dangers of falling into them,especially since most of these wells become buried over *** solutions have been developed recently,most with the aimof exploring these well ***,these systems suffer fromseveral limitations,including high complexity,large size,or *** paper focuses on the development of a smart exploration unit that is able to investigate underground well areas,build a 3D map,search for persons and animals,and determine the levels of oxygen and other *** exploration unit has been implemented and validated through several experiments using various experiment *** results proved the efficiency of the developed exploration unit,in terms of 3D modeling,searching,communication,and measuring the level of *** average accuracy of the 3D modeling function is approximately 95.5%.A benchmark has been presented for comparing our results with related works,and the comparison has proven the contributions and novelty of the proposed system’s results.

关键词： Well exploration lidar scanning 3Dmodelling rescue

Schistosomal(bilharzial)polyps:Travel through the colon and beyond

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World Journal of Gastroenterology 2023年第26期29卷 4156-4165页

作者： mohamed H Emara Aya m mahros abdelrahman m Ahmed Rasheda mohamed I Radwan Besher mohamed Osama Abdelrazik mostafa Elazab Hassan Elbatae Department of Hepatology Gastroenterology and Infectious DiseasesKafrelsheikh UniversityKafr-Elshikh 33516Egypt Department of Internal medicine Gastroenterology UnitSecurity Forces HospitalRyiadh 11481Saudi Arabia Department of Tropical medicine Zagazig UniversityZagazig 44519Egypt Department of Gastroenterology Surrey and Sussex Hospitals NHS TrustSurrey RH15RHUnited Kingdom Department of Hepato-Gastroenterology and Infectious Diseases Al-Azhar UniversityCairo 11651Egypt

Schistosomiasis(bilharziasis)is a major neglected tropical *** is endemic in many tropical and subtropical *** polyps(***)are not uncommon presentation of this *** the colon is the most commonly affected organ,many other organs are *** are associated with a variable range of morbidity independent of the Schistosomal *** are frequently described in endemic areas and increasingly reported in non-endemic areas mainly among immigrants and visitors to the endemic *** review aimed to increase awareness of practitioners,especially gastroenterologists,for this peculiar type of polyps caused by this neglected infection hence improving patient ***-based search of different databases was conducted for the literature focusing the development of *** in the colon and other organs with analysis of the clinical manifestations,diagnosis and *** following key words were used in the search,“Schistosomiasis”OR“Bilharziasis”AND“Polyps”OR“Polyp”AND“Colon”OR“Small intestine”OR“Duodenum”OR“Stomach”OR“Esophagus”OR”Gallbladder”OR”Pharynx”OR“Larynx”OR“Trachea”OR”Urinary bladder”OR“Ureter”OR“Renal Pelvis”OR“Urethra”.All publication types including case reports,case series,original research,and review articles were retrieved and *** are not infrequent presentation of acute or chronic Schistosomal *** are described in many organs including the bowel,genitourinary tract,skin,gallbladder and the *** of *** is variable and depends on the site,number as well as the polyp *** relationship of *** to malignant transformation is a matter of *** of *** is sometimes the only manifestation of *** polyps can be treated medically with praziquantel,while large accessible polyps are amendable for endoscopic excision through different polyp resection ***,huge,complicated,non-accessible and sus

关键词： Schistosomiasis Bilharziasis Schistosomal polyps Colon Praziquantel