检索结果-南通市图书馆

Effect of fineness of ash on pozzolanic properties and acid resistance of sugarcane bagasse ash replaced cement mortars

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2022年第10期16卷 1287-1300页

作者： Shan E ALI Rizwan AZAM Muhammad Rizwan RIAZ Mohamed ZAWAM Department of Civil Engineering University of Engineering&Technology LahoreLahore 54890Pakistan Faculty of Engineering Cairo UniversityCairo 12613Egypt

This paper addresses the potential use of Sugar Cane Bagasse Ash(SCBA)as a pozzolanic material for partial cement replacement in concrete *** mortars containing SCBA having five different particle size distributions at a replacement rate of 20%by weight were used to study the chemical and physical pozzolanic properties of *** durability of SCBA replaced mortars was also *** with 0%retained on sieve No.325 was used to replace 20%by weight of cement and create mortar specimens that were subjected to sulfuric acid attack of varying concentrations(1%–3%by weight of water).The tested samples were observed to check visual distortion,mass loss,and compressive strength loss at 1,7,14,28,and 56 d of acidic exposure,and the results were compared to those for the control sample,that was lime water cured,at the same *** SCBA sets were found to meet the requirements for pozzolan class N specified by ASTM C *** containing SCBA with 0%or 15%retention produced better compressive strength than the control mortars after 28 ***,X-ray fluorescence and X-ray diffraction analysis showed that the SCBA had favorable chemical properties for a pozzolanic ***,SCBA replaced samples at all ages showed improved resistance against acidic attack relative to that of the control *** deterioration was seen for 3%concentrated *** study’s findings demonstrated that SCBA with an appropriate fineness could be used as a pozzolanic material,consistently with ASTM C 618.

关键词： durability cement replacement sugarcane bagasse ash fineness of ash pozzolanic properties mortar acid resistance

Blockchain and IIoT Enabled Solution for Social Distancing and Isolation Management to Prevent Pandemics

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第7期76卷 687-709页

作者： Muhammad Saad Maaz Bin Ahmad Muhammad Asif Muhammad Khalid Khan Toqeer Mahmood Elsayed Tag Eldin Hala Abdel Hameed College of Computing and Information Sciences Karachi Institute of Economics&TechnologyKarachiPakistan Department of Computer Science Lahore Garrison UniversityLahorePakistan Department of Computer Science National Textile UniversityFaisalabad37610Pakistan Faculty of Engineering and Technology Future University in Egypt New Cairo11835Egypt Faculty of Computer and Information Systems Fayoum UniversityFaiyumEgypt Khaybar Applied College Taibah UniversityMedinaSaudi Arabia

Pandemics have always been a nightmare for humanity,especially in developing *** lockdowns are considered one of the effective ways to deal with spreading such ***,developing countries cannot afford such solutions because these may severely damage the country’s ***,this study presents the proactive technological mechanisms for business organizations to run their standard business processes during pandemic-like situations *** novelty of this study is to provide a state-of-the-art solution to prevent pandemics using industrial internet of things(IIoT)and blockchain-enabled *** to existing studies,the immutable and tamper-proof contact tracing and quarantine management solution is *** use of advanced technologies and information security is a critical area for practitioners in the internet of things(IoT)and corresponding ***,this study also emphasizes information security,end-to-end solution,and experimental ***,a wearable wristband is proposed,incorporating 4G-enabled ultra-wideband(UWB)technology for smart contact tracing mechanisms in industries to comply with standard operating procedures outlined by the world health organization(WHO).Secondly,distributed ledger technology(DLT)omits the centralized dependency for transmitting contact tracing ***,a privacy-preserving tracing mechanism is discussed using a public/private key cryptography-based authentication ***,based on geofencing techniques,blockchain-enabled machine-to-machine(M2M)technology is proposed for quarantine *** step-by-step methodology and test results are proposed to ensure contact tracing and quarantine *** existing research studies,the security aspect is also considered in the realm of *** practical implementation of the proposed solution also obtains the *** results indicate the successful implementation of blockchain-enabled contac

关键词： Blockchain contact tracing distributed ledger technology geo-fencing internet of things industrial internet of things isolation management social distancing ultra-wideband

Spanning Simplicial Complex of Wheel Graph Wn

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Algebra Colloquium 2019年第2期26卷 309-320页

作者： A. Zahid M.U. Saleem A. Kashif M. Khan M.A. Meraj R. Irfan Department of Mathematicsf university of Exlucation Lahore Pakistan university of Management and Technology Lahore Pakistan Department of Mathematics University of Education Lahore Pakistan Department of Mathematics COMSATS University Islamabad Sahiwal Campus Sahiwal Pakistan

In this paper, we explore the spanning simplicial complex of wheel graph Wn on vertex set [n]. Combinatorial properties of the spanning simplicial complex of wheel graph are discussed, which are then used to compute the f-vector and Hilbert series of face ring k[Δs(Wn)] for the spanning simplicial complex Δs(Wn). Moreover, the associated primes of the facet ideal IF(Δs(Wn)) are also computed.

关键词： simplicial complexes spanning trees spanning simplicial complexes f-vectors Hilbert series vertex covers

Anisotropic extensions of isotropic Finch–Skea metric in the charged modified gravity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2024年第9期76卷 118-140页

作者： Tayyab Naseer M Sharif Department of Mathematics and Statistics The University of Lahore1-Km Defence RoadLahore 54000Pakistan

In this study,we explore the Finch–Skea perfect fluid solution and extend its domain to three distinct anisotropic interior models within the framework of the f(R,T)theory,incorporating the influence of an electromagnetic *** assume a static spherical spacetime initially coupled with an isotropic matter *** then introduce a Lagrangian corresponding to an additional gravitating source,taking into account its role in inducing pressure anisotropy within the original fluid *** deriving the field equations for the combined matter setup,we applied a radial component transformation,which yielded two distinct systems of *** addition,we consider a charged exterior spacetime to determine the three constants associated with the Finch–Skea solution at the *** findings suggest that under certain parametric choices,all three resulting models exhibited physical relevance within this modified theory.

关键词： anisotropy modified gravity gravitational decoupling

Telepresence Robots and Controlling Techniques in Healthcare System

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第3期74卷 6623-6639页

作者： Fawad Naseer Muhammad Nasir Khan Zubair Nawaz Qasim Awais Electrical Engineering Department The University of LahoreLahorePakistan Faculty of Computing and Information Technology University of the PunjabLahorePakistan Electrical Engineering Department Fatima Jinnah Women UniversityRawalpindiPakistan

In this era of post-COVID-19,humans are psychologically restricted to interact less with other *** to the world health organization(WHO),there are many scenarios where human interactions cause severe multiplication of viruses from human to human and spread *** healthcare systems shifted to isolation during the pandemic and a very restricted work *** were done to overcome the remedy,and the researcher developed different techniques and recommended *** robot was the solution achieved by all industries to continue their operations but with almost zero physical interaction with other *** played a vital role in this perspective to help humans to perform daily routine *** workers can use telepresence robots to interact with patients who visit the healthcare center for initial diagnosis for better healthcare system performance without direct *** presented paper aims to compare different telepresence robots and their different controlling techniques to perform the needful in the respective scenario of healthcare *** paper comprehensively analyzes and reviews the applications of presented techniques to control different telepresence ***,our feature-wise analysis also points to specific technical,appropriate,and ethical challenges that remain to be *** proposed investigation summarizes the need for further multifaceted research on the design and impact of a telepresence robot for healthcare centers,building on new perceptions during the COVID-19 pandemic.

关键词： Telepresence robot controlling techniques healthcare center unmanned ground vehicle(UGV) telehealth

Laser-assisted ablation and plasma formation of titanium explored by LIBS,QCM, optical microscopy and SEM analyses along with mechanical modifications under different pressures of Ar and Ne

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plasma Science and Technology 2023年第3期25卷 181-192页

作者： Maryam RIAZ Shazia BASHIR Asma HAYAT Zarish NAZ Centre for Advanced Studies in Physics GC university lahore

This study deals with the investigation of Nd:YAG laser-assisted ablation and plasma formation of Ti at irradiance of 0.85 GW cm-2 under Ar and Ne environment at various pressures ranging from 10-120 ***-induced breakdown spectroscopy is used to evaluate plasma parameters,whereas quartz crystal microbalance is used for ablation yield *** crater depth is evaluated by optical *** surface features are explored by scanning electron microscope(SEM) analysis and the micro-hardness is measured by a Vickers hardness *** is observed that the plasma parameters are higher in Ar than in Ne,and are strongly correlated with the ablation yield,ablation depth,surface features and hardness of laser-ablated *** parameters increase with increasing the pressure of environmental gases,attain their maxima at 40 Torr for Ar and at 60 Torr for ***,they show a decreasing trend up till a maximum pressure of 120 *** maximum value of the electron temperature(Te) is5480 K,number density(ne) is 1.46 × 1018 cm-3,ablation depth is 184 μm,ablation yield is3.9 × 1015 atoms/pulse and hardness is 300 HV in the case of Ar *** analysis reveals the growth of surface features,such as cones,ridges and pores,whose appearance is more distinct in Ar than Ne and is attributed to temperature,pressure and density gradients along with recoil pressure of the Ti plasma.

关键词： ablation plasma electron temperature electron density laser-induced breakdown spectroscopy surface structures

A note on the unsteady flow of a fractional Maxwell fluid through a circular cylinder

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2012年第2期28卷 308-314页

作者： M.Athar A.U.Awan Corina Fetecau Abdus Salam School of Mathematical Sciences GC University Lahore68-BNew Muslim Town LahorePakistan

In this note the velocity field and the adequate shear stress corresponding to the unsteady flow of a frac- tional Maxwell fluid due to a constantly accelerating circular cylinder have been determined by means of the Laplace and finite Hankel transforms. The obtained solutions satisfy all imposed initial and boundary conditions. They can easily be reduced to give similar solutions for ordinary Maxwell and Newtonian fluids. Finally, the influence of pertinent param- eters on the fluid motion, as well as a comparison between models, is underlined by graphical illustrations.

关键词： Fractional Maxwell fluid Velocity field Shear stress Exact solutions

Stability analysis of static spherical spacetime in extended symmetric teleparallel gravity

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第12期48卷 189-199页

作者： M.Zeeshan Gul M.Sharif Adeeba Arooj Department of Mathematics and Statistics The University of Lahore1-KM Defence Road Lahore-54000Pakistan

Our manuscript aims to analyze the viability and stability of anisotropic stellar objects in the modified symmetric teleparallel gravity.A particular model of this extended theory is considered to formulate explicit field equations that govern the interaction between matter and *** configuration of static spherical symmetric structures is examined through the Finch-Skea ***,the values of unknown constants in the metric potentials are evaluated by the Darmois junction *** the viability of the proposed stellar objects,physical parameters including density,pressure,anisotropy,mass,energy constraints,compactness function,and redshift are ***,the stability of the proposed stellar objects is investigated by the causality condition,Herrera cracking approach,and adiabatic *** findings indicate that the proposed stellar objects are viable as well as stable in the presence of correction terms.

关键词： modified theory stellar objects Darmois junction conditions

Chaplygin gas inspired warm inflation and swampland conjectures through various scalar potentials

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第9期48卷 254-273页

作者： Abdul Jawad Nadeem Azhar Shama Sadiq Shamaila Rani Institute for Theoretical Physics and Cosmology Zhejiang University of TechnologyHangzhou 310023China Department of Mathematics COMSATS University IslamabadLahore CampusLahore-54000Pakistan Department of Mathematics National University of Modern Languages(NUML)Lahore CampusLahore-54000Pakistan

In this paper,we analyze inflationary parameters and swampland conjectures in the presence of a scalar field and Chaplygin *** examine inflationary parameters,such as slow-roll parameters,scalar and tensor power spectra,spectral index,and tensor-to-scalar ratio,in the presence of a scalar field and Chaplygin gas *** also discuss recently proposed swampland *** assume that the inflationary expansion is driven by a standard scalar field with a decay ratioΓthat has a generic power-law dependence on the scalar field 0 and that the temperature of the thermal bath T is given byΓ(φ,T)=C_(φ)T^(a)/φ^(a-1),where C_(φ)is a dimensionless parameter and a is the inflation decay *** a scenario where our model operates within a robust dissipative environment(R>>1),we analyze both fundamental and perturbative dynamics to extract key inflationary *** include the scalar power spectrum P_(R),dissipative ratio R,scalar spectral index n_(s),tensor-to-scalar ratio r,running of the scalar spectral index dn_s/dlnk,and generalized ratio of the swampland de-Sitter conjecture T'V/V'T for three different potentials.

关键词： warm inflation swampland conjectures scalar potentials inflationary parameters