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Computational Analysis of Heat and Mass Transfer in Magnetized Darcy-Forchheimer Hybrid Nanofluid Flow with Porous Medium and Slip Effects

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Computer Modeling in Engineering & Sciences 2023年第12期137卷 2311-2330页

作者： Nosheen Fatima Nabeela Kousar khalil Ur Rehman Wasfi Shatanawi Faculty of Basic and Applied Sciences Department of MathematicsAir UniversityPAF Complex E-9Islamabad44000Pakistan Department of Mathematics and Sciences College of Humanities and SciencesPrince Sultan UniversityRiyadh11586Saudi Arabia Department of Mathematics Air UniversityPAF Complex E-9Islamabad44000Pakistan Department of Medical Research China Medical University HospitalChina Medical UniversityTaichung40402TaiwanChina Department of Mathematics Faculty of ScienceThe Hashemite UniversityP.O Box 330127Zarqa13133Jordan

A computational analysis of magnetized hybrid Darcy-Forchheimer nanofluid flow across a flat surface is presented in this *** the study of heat and mass transfer aspects viscous dissipation,activation energy,Joule heating,thermal radiation,and heat generation effects are *** suspension of nanoparticles singlewalled carbon nanotubes(SWCNTs)and multi-walled carbon nanotubes(MWCNTs)are created by hybrid ***,single-walled carbon nanotubes(SWCNTs)produce nanofluids,with water acting as conventional fluid,*** partial differential equations(PDEs)that describe the ultimate flow are converted to nonlinear ordinary differential equations(ODEs)using appropriate similarity *** ODEs are dealt with numerically by means of MATLAB’s inbuilt routine function ***,temperature,and concentration profiles are explained pictorially whereas Sherwood number,local skin friction coefficient,and Nusselt number values are represented through bar *** radiation and activation parameters shows direct impact on flow ***,hybrid nanofluid admits a higher magnitude of velocity and temperature than nanofluid,but the concentration profile exhibits the opposite *** notable findings of the present investigation have significant applications in heat combustion and cooling chambers,space technology,the ceramics industry,paint and conductive coatings,bio-sensors,and many more.

关键词： Heat transfer hybrid nanofluid MCNTs SCNTs MHD Darcy-Forchheimer joule heating activation energy

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

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

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

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

Delay Issues of Project Planning in M5 Highway Project of Pakistan

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Delay Issues of Project Planning in M5 Highway Project of Pa...

作者： WAJID khalil 山东大学

学位级别：硕士

Highway construction Industry is playing an important role in improving Pakistan’s *** construction industry of Pakistan is facing issues related delays in project planning especially in highways *** purpose of this study is to empirically investigate the delay issues of project planning in M5 Highway Project of *** find out the impact of factors which effects the project performance consequently lead to project *** was collected from 132 respondents those are working on M5 highway project through questionnaire and respondents were asked about factors which cause delay in M5 highway *** results were analyzed by using *** results of this study indicated that there is positive and significant association between employees’related delay and labor related ***,results also indicated that design related delay has insignificant impact on project *** research will help to overcome the causes of delays and some suggestions are given for reducing delay issues in M5 highway project in *** these suggestions the delay in project planning in M5 highway project can be alleviated.

关键词： Highway construction Industry project planning Pakistan

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

Pyrolysis and Kinetic Characherization of Lignocellulose Biomass Via Thermogravemeteric Analysis

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Pyrolysis and Kinetic Characherization of Lignocellulose Bio...

作者： khalil Jibran 海南大学

学位级别：硕士

许多年来,巴基斯坦面临着严重的能源短缺。该国的能源危机已经影响到巴基斯坦的其他经济领域。在当代世界,各国的经济严重依赖于不间断的能源供应。以更高的成本提供的能源反而会增加产品的制造成本。2030年的能源需求将会是如今的七倍... 详细信息

许多年来,巴基斯坦面临着严重的能源短缺。该国的能源危机已经影响到巴基斯坦的其他经济领域。在当代世界,各国的经济严重依赖于不间断的能源供应。以更高的成本提供的能源反而会增加产品的制造成本。2030年的能源需求将会是如今的七倍,将需要超过3.61亿吨的能源。此外,石油价格是波动的,将升至每桶100美元以上,这将直接影响该国的经济。来自生物质的能量是集中的,并且转换技术是高效的。此外,从不可再生能源向可再生能源的转变更加便宜、环保,并且足以解决国家的能源问题。由于巴基斯坦是一个农业国,农作物残留物在全国广泛产生和分布,目前的研究集中在从最常见的巴基斯坦原料中回收能量,包括棉花、稻壳、甘蔗渣和锯末。在目前的工作中,通过应用热重分析进行生物质的动力学研究,收集近似和最终结果,并监测所选生物质之间的组成差异。热重分析结果表明,生物质在三个不同的区域降解。在第一个降解区域,水分被蒸发。而在第二降解区,生物质中的纤维素和半纤维素被分解。在第三分解阶段,生物质中的木质素在惰性或氧气燃烧环境下被降解。目前的研究调查了在这种情况下利用当地生物质废物进行能源生产的情况,TGA分析被用来确定生物质中潜在的挥发性物质碳含量及其燃尽残渣。热重分析结果表明,生物质在三个不同的区域降解,在第一个区域,水分被蒸发。在惰性环境下观察样品的高热值(HHV),SD样品为15.79 MJ·kg,RH样品为12.36 MJ·kg,SB样品为16.83 MJ·kg,CS样品为15.11 MJ·kg。而在氮气环境下,SD的活化能为53.46 k J·mol,RH为52.9 k J·mol,CS为79.10 k J·mol,SB为68.32k J·mol。此外,对于上述样品序列,在燃烧环境下计算的活化能分别为123.28 k J·mol、118 k J·mol、106.31k J·mol和122.6 k J·mol。这些结果对于利用当地生物质作为能源以及减少环境污染具有重要意义。

关键词：生物质能农业废弃物热重分析(TGA)

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