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An energetic nano-fiber composite based on polystyrene and 1,3,5-trinitro-1,3,5-triazinane fabricated via electrospinning technique

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Defence Technology(防务技术) 2023年第9期27卷 1-8页

作者： Mahmoud Abdelhafiz Ahmed K.Hussein Waleed F.khalil Ahmed Elbeih Military TechnicalCollege(MTC) KobryElkobbahCairoEgypt Safety FuelCycleDepartment NRSRCEgyptianAtomicEnergyAuthority(EAEA)CairoEgypt

Electrospinning is a simple technique used to fabricate polymeric nano-fibrous *** nano-fibers have found a wide range of valuable applications in the biomedical ***,it has not been utilized with solid high explosives ***,the electrospinning technique has been used to fabricate polystyrene(PS)/1,3,5-trinitro-1,3,5-triazinane(RDX)composite *** governed electrospinning parameters,voltage,distance from the collector,flow rate,mandrel rotating speed,time,and solution concentration,that greatly affect the morphology of the obtained nanofibers were *** fabricated PS/RDX nano-fibers were characterized using scanning electron microscopy(SEM),X-ray diffractometer(XRD),and Fourier Transform Infrared(FTIR)*** impact and friction sensitivities of PS/RDX were also *** thermal behavior of the prepared composite and the pure materials were studied by the thermal gravimetric analysis technique(TGA).SEM results proved the fabrication of PS/RDX fibers in the nano-size via *** spectroscopy confirmed the existence of the characteristic functional groups of both PS and RDX in the composite *** sharp peaks showed the conversion of amorphous PS into crystalline shape via electrospinning and also confirmed the formation of PS/RDX *** PS fibers absorbed the heat and increased the onset decomposition of the pure RDX from 181.5 to 200.7℃in the case of PS/RDX ***,PS/RDX nano-fibers showed the relatively low impact and friction sensitivities of 100 J and 360 N *** results could introduce PS/RDX nanofibrous composite in the field of explosives detection with high levels of safety.

关键词： Electrospinning Nano-fibers 1,3,5-Trinitro-1,3,5-triazinane(RDX) Polystyrene(PS) Sensitivity

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Bayesian Multidimensional Scaling for Location Awareness in Hybrid-Internet of Underwater Things

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IEEE/CAA Journal of Automatica Sinica 2022年第3期9卷 496-509页

作者： Ruhul Amin khalil Nasir Saeed Mohammad Inayatullah Babar Tariqullah Jan Sadia Din IEEE Department of Electrical Engineering Faculty of Electrical and Computer EngineeringUniversity of Engineering and TechnologyPeshawar 25120Pakistan the Department of Electrical Engineering Northern Border UniversityArar 73222Saudi Arabia College of Science and Engineering Hamad Bin Khalifa UniversityDoha 34110Qatar

Localization of sensor nodes in the internet of underwater things(IoUT)is of considerable significance due to its various applications,such as navigation,data tagging,and detection of underwater ***,in this paper,we propose a hybrid Bayesian multidimensional scaling(BMDS)based localization technique that can work on a fully hybrid IoUT network where the nodes can communicate using either optical,magnetic induction,and acoustic *** communication technologies are already used for communication in the underwater environment;however,lacking localization *** and magnetic induction communication achieves higher data rates for short *** the contrary,acoustic waves provide a low data rate for long-range underwater *** proposed method collectively uses optical,magnetic induction,and acoustic communication-based ranging to estimate the underwater sensor nodes’final ***,we also analyze the proposed scheme by deriving the hybrid Cramer-Rao lower bound(H-CRLB).Simulation results provide a complete comparative analysis of the proposed method with the literature.

关键词： Bayesian multidimensional scaling(BMDS) hybrid Cramer-Rao lower bound(H-CRLB) internet of underwater things(IoUT) signals of opportunity(SOA)approach

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我眼中的浪漫南京

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国际人才交流 2024年第1期 60-63页

作者：阿萨德·凯利勒张佳艺(译) 西南政法大学

中国华东地区有一座城市,历史的回声与未来的创新在此交织,这里是中国深厚文化、传统与现代之缩影。欢迎来到南京,这座坐落在浩瀚长江之畔的迷人大都市。南京拥有千年的历史瑰宝、繁华的商业中心和拥抱全球变革的远见卓识,是一座过去与... 详细信息

中国华东地区有一座城市,历史的回声与未来的创新在此交织,这里是中国深厚文化、传统与现代之缩影。欢迎来到南京,这座坐落在浩瀚长江之畔的迷人大都市。南京拥有千年的历史瑰宝、繁华的商业中心和拥抱全球变革的远见卓识,是一座过去与未来和谐交融的城市。让我们一同踏上南京之旅,穿越古老的曲折小巷、充满活力的城市景观和生机勃勃的文化,领略传统与创新所展现出的中国经久不衰的魅力。南京的浪漫魅力体现在如诗如画的风景中。宁静的秦淮河蜿蜒流过南京市中心,古城墙和古寺庙散发出典雅的韵味。

关键词：商业中心传统与创新古城墙魅力体现华东地区城市景观和谐交融秦淮河

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The upshot of Polyphenolic compounds on immunity amid COVID-19 pandemic and other emerging communicable diseases: An appraisal

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Natural Products and Bioprospecting 2020年第6期10卷 411-429页

作者： Ayman khalil Diana Tazeddinova Department of Food Technology South Ural State UniversityChelyabinskRussian Federation

Polyphenols are a large family of more than 10,000 naturally occurring compounds,which exert countless pharmacological,biological and physiological benefits for human health including several chronic diseases such as cancer,diabetes,cardio-vascular,and neurological *** role in traditional medicine,such as the use of a wide range of remedial herbs(thyme,oregano,rosemary,sage,mint,basil),has been well and long known for treating common respiratory problems and cold *** review reports on the most highlighted polyphenolic compounds present in up to date literature and their specific antiviral perceptive properties that might enhance the body immunity facing COVID-19,and other viral infec-tious *** fact,several studies and clinical trials increasingly proved the role of polyphenols in controlling numer-ous human pathogens including SARS and MERS,which are quite similar to COVID-19 through the enhancement of host immune response against viral infections by different biological ***,polyphenols ought to be considered as a potential and valuable source for designing new drugs that could be used effectively in the combat against COVID‐19 and other rigorous diseases.

关键词： Polyphenols Natural product COVID-19 SARS Respiratory tract Infectious diseases

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Dynamics of volatility spillover between stock market and foreign exchange market: evidence from Asian Countries

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Financial Innovation 2016年第1期2卷 29-48页

作者： khalil Jebran Amjad Iqbal Department of Management Studies University of MalakandChakdaraPakistan Dongbei University of Finance and Economics DalianChina

Background:The purpose of this study is to examine volatility spillover effects between stock market and foreign exchange market in selected Asian countries;Pakistan,India,Sri Lanka,China,Hong Kong and *** study considered daily data from 4th January,1999 to 1st January,***:This study opted EGARCH(Exponential Generalized Auto Regressive Conditional Heteroskedasticity)model for the purpose of analyzing asymmetric volatility spillover effects between stock and foreign exchange ***:The EGARCH analyses reveal bidirectional asymmetric volatility spillover between stock market and foreign exchange market of Pakistan,China,Hong Kong and Sri *** results reveal unidirectional transmission of volatility from stock market to foreign exchange market of *** analysis reveals no evidence of volatility transmission between the two markets in reference to ***:The result of this study provide valuable insights to economic policy makers for financial stability perspective and to investors regarding decision making in international portfolio and currency risk strategies.

关键词： Volatility spillover Asian Countries EGARCH Exchange rate Stock market

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Friction-stir-welded overaged 7020-T6 alloy joint: an investigation on the effect of rotational speed on the microstructure and mechanical properties

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International Journal of Minerals,Metallurgy and Materials 2019年第5期26卷 622-633页

作者： M.Alipour Behzadi khalil Ranjbar R.Dehmolaei E.Bagherpour Materials Science and Engineering Department Faculty of Engineering Shahid Chamran University of Ahvaz Department of Mechanical Engineering Doshisha University

Commercial A7020-T6 plates in the overaged state were subjected to friction stir welding with four different tool rotational speeds of 500, 710, 1000, and 1400 r/min and a single traverse feed rate of 40 mm/min. The resultant changes in the welding heat input, microstructure, and the mechanical properties of the joints were investigated. The changes were related to the processes of growth, dissolution, and re-formation of precipitates. The precipitate evolution was examined by differential scanning calorimetry, and the microstructural analysis was conducted using optical, scanning, and transmission electron microscopes. The results showed that the grain size in the stirred zone(SZ) decreased substantially compared with the base metal, but increased with tool rotational speed because of the rise in temperature. We found that the width of the heat-affected zone increased with tool rotational speed. The hardness and the tensile strength in the SZ increased with increasing heat input compared with the base metal in the overaged condition. This recovery in mechanical properties of the joints can be attributed to the dissolution and re-formation of precipitates in the SZ and the thermomechanically affected zone. This process is referred to as an "auto-aging treatment."

关键词： A7020-T6 overaged friction stir welding precipitates rotational speed heat input auto-aging

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Skeletal muscle metastasis from colorectal adenocarcinoma:A literature review

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World Journal of Gastrointestinal Surgery 2022年第7期14卷 696-705页

作者： Nikhil Kulkarni Ahmed khalil Shruti Bodapati Department of General and Colorectal Surgery Lincoln County HospitalLincoln LN52QYUnited Kingdom Department of General Surgery Plymouth University HospitalsPlymouth PL68DHUnited Kingdom

BACKGROUND Colorectal adenocarcinoma is the third most common cancer *** accounts for almost 10%of all cancer-related *** muscle is a very unusual site for metastasis from colorectal cancers and is associated with a poor prognosis and high *** To review the literature for cases of skeletal muscle metastasis(SMM)from colorectal *** A systematic literature search using a validated search strategy was carried out to identify the incidence of SMM associated with colorectal *** studies identified were tabulated in a PRISMA,and data was extracted in a tabulated *** Twenty-nine studies were included in this literature *** was most commonly detected in the thigh *** of the tumours had originated from the rectum or the right *** histopathology of the primary tumour was generally *** mean time interval between the primary tumour and onset of SMM was 22 *** 3 cases,asymptomatic SMM had been picked up by advanced imaging systems,like fluorodeoxyglucose-positron emission tomography *** SMM from colorectal adenocarcinomas is a rare ***,it is possible that the low incidence could be due to *** use of advanced imaging techniques and a high index of clinical suspicion might increase the reporting of SMM from colorectal adenocarcinoma.

关键词： Skeletal muscle Metastasis Colorectal cancer Adenocarcinoma Systematic review

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Security Threat and Vulnerability Assessment and Measurement in Secure Software Development

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Computers, Materials & Continua 2022年第6期71卷 5039-5059页

作者： Mamoona Humayun NZ Jhanjhi Maram Fahhad Almufareh Muhammad Ibrahim khalil Department of Information Systems College of Computer and Information SciencesJouf UniversityAl-JoufKSA School of Computer Science and Engineering(SCE) Taylor’s UniversitySelangorMalaysia Department of Computer Science Bahria UniversityIslamabadPakistan

Security is critical to the success of software,particularly in today’s fast-paced,technology-driven *** ensures that data,code,and services maintain their CIA(Confidentiality,Integrity,and Availability).This is only possible if security is taken into account at all stages of the SDLC(Software Development Life Cycle).Various approaches to software quality have been developed,such as CMMI(Capabilitymaturitymodel integration).However,there exists no explicit solution for incorporating security into all phases of *** of the major causes of pervasive vulnerabilities is a failure to prioritize *** the most proactive companies use the“patch and penetrate”strategy,inwhich security is accessed once the job is *** cost,time overrun,not integrating testing and input in SDLC,usage of third-party tools and components,and lack of knowledge are all reasons for not paying attention to the security angle during the SDLC,despite the fact that secure software development is essential for business continuity and survival in today’s ICT *** is a need to implement best practices in SDLC to address security at all *** fill this gap,we have provided a detailed overview of secure software development practices while taking care of project costs and *** proposed a secure SDLC framework based on the identified practices,which integrates the best security practices in various SDLC phases.A mathematical model is used to validate the proposed framework.A case study and findings show that the proposed system aids in the integration of security best practices into the overall SDLC,resulting in more secure applications.

关键词： Security secure software development software development life cycle(SDLC) confidentiality integrity availability

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The 1st Euro-Mediterranean Workshop: Natural Products in Health and Diseases: Cairo, Egypt,March 2, 2015

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Asian Journal of Pharmaceutical Sciences 2016年第2期11卷 292-296页

作者： Kamal D.Moudgila Ashraf A.khalil University of Maryland School of Medicine BaltimoreUSA City of Scientific Research and Technological Applications Borg ElarabAlexandriaEgypt

Natural plant products have been used for centuries for health maintenance and treatment of a variety of diseases in various traditional systems of medicine in Egypt and other African countries, India, China, and other countries around the world. Over the past several decades, the popularity of herbal and other natural products has gradually increased in many western countries. Despite the increasing popularity of natural products, both the public and the professionals are skeptical about the use of these products. Reasons for this skepticism include, but are not limited to, the lack of proper documentation about the source and formulations used;standardization of the composition, batch-to-batch consistency, documented safety of herbal products;and information about the mechanisms of action of these products. The 1 st Euro-Mediterranean Workshop: Natural Products in Health and Diseases was organized by the Euro-Mediterranean Association of Life Sciences (EMALS) and various other local organizations to review and discuss the above-mentioned strengths and limitations of the use of natural products. The aim of this workshop was to share best practices and expertise about natural products, and to identify opportunities for collaboration among researchers, health professionals, and business personnel in a productive atmosphere.

关键词： BioNat Natural products Workshop Health Disease EMALS

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Localization and macroscopic instability in nanoporous metals

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Acta Mechanica Sinica 2022年第12期38卷 15-32页

作者： Zhangtao Sun Tianfu Guo khalil I.Elkhodary Hang Yang Nian Zhou Shan Tan School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing 100083China Institute of High Performance Computing A*STARSingapore 138632Singapore Department of Mechanical Engineering The American University in CairoNew Cairo 11835Egypt Department of Engineering Mechanics Dalian University of TechnologyDalian I16081China School of Materials and Energy Engineering Guizhou Institute of TechnologyGuiyang 550003China

Ductile fracture generally relates to microscopic voiding and to strain localization in metallic *** the void size is reduced to the nanoscale,size effects often lead to a different macroscopic plastic behavior from that established for the same material with larger *** example,irradiation of metallic materials can generate a large number of voids at the nanoscale,leading to complex deformation *** present work advances the understanding of strain localization in nanoporous metallic materials,connecting both the microscopic(nano-)and macroscopic *** explore the physical mechanisms at the nanoscale,molecular dynamics(MD)simulations were here carried out,capturing multiple nanovoids ***,a homogenized continuum theory based in Gurson's constitutive framework is proposed,which enables us to explore how localized behavior at the macroscopic scale *** homogenized model incorporates the surface tension associated with nanosized *** importance of this surface tension is illustrated by several parametric studies on the conditions of localization,when a specimen is subjected to uniaxial *** parametric studies show that for smaller nanovoid sizes,and for a hardening matrix material,shear localization onset is *** proposed homogenization model was then used to predict localization behavior captured by our MD *** yield stress and the localization strain predicted by our continuum model are in general agreement with the trends obtained by MD ***,based on our present study,experimental results of shear failure strain *** of irradiation for several metals could be qualitatively explained rather *** model can therefore help shed light on prolonging the operation limits and the lifetime of irradiated metallic materials under complex loading conditions.

关键词： Nanovoids MD simulations Localization Surface tension Shear band

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