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Environmental analysis of innovative sustainable composites with potential use in aviation sector -A life cycle assessment review

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Science China(Technological Sciences) 2017年第9期60卷 1301-1317页

作者： BACHMANN Jens HIDALGO carme RICOUT Stephanie Deutsches Zentrum fiir Lufi- und Raumfahrt e. V. (German Aerospace Centre) Institute of Composite Structures and Adaptive Systems-Department of Multifunctional Materials Lilienthalplatz 7 38108 Braunsehweig Germany Leitat Technological Center C/Innovacio 2 08225 Terrassa Spain Airbus Group Innovations Fuels and Environment 12 rue Pasteur 92152 Suresnes France

The forecast of growing air transport in the upcoming decades faces the challenge of an increasing environmental *** industry is working on promising technologies to mitigate this environmental *** design is a strong lever to lower the fuel consumption and,consequently,with it the emissions of *** performance composites are a key technology to help achieve these aims thanks to their favourable combination of mechanical properties and low weight in primary ***,mainly synthetic materials such as petrol based carbon fibres and epoxy resins are used nowadays to produce composite in *** materials like bio-based fibres and resin systems offer potential environmental ***,they have not found their way into aviation,*** reasons are reduced mechanical properties and,especially for the use of natural fibres,their *** of these shortcomings are under *** the application of bio-based and recycled materials in certain areas of the aircraft could be possible in the *** examples for applications are furnishings and secondary *** motivation for this paper is to give an overview of potential environmental properties by using such eco-materials in *** cycle assessment(LCA) is a tool to calculate environmental impacts during all life stages of a *** main focus is laid on the bio-fibres flax and ramie,recycled carbon fibres and bio-based thermoset resin *** an overview of environmental aspects of existing composite materials used in aviation is ***,a lack of LCA results for the substitution of synthetic materials by bio-based/recycled composite materials in aviation applications has been ***,available information from other transport areas,such as automotive,has been *** detailed LCA data for eco-composite materials and technologies to improve their properties is import

关键词： aviation composite natural fibre recycled carbon fibre bio-resin cabin interior secondary structure,fife cycle assessment (LCA)

Microstructural analysis and hot corrosion behavior of HVOF-sprayed Ni–22Cr–10Al–1Y and Ni–22Cr–10Al–1Y–SiC(N) coatings on ASTM-SA213-T22 steel

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International Journal of Minerals,Metallurgy and Materials 2020年第3期27卷 401-416页

作者： Gurmail Singh Niraj bala Vikas Chawla Department of Mechanical Engineering IKGPTUJalandhar 144603PunjabIndia Department of Aerospace Engineering Chandigarh UniversityGharuan 140413PunjabIndia Department of Mechanical Engineering BBSBECFatehgarh Sahib 140407PunjabIndia

The present paper deals with the investigation of microstructure and high-temperature hot corrosion behavior of high-velocity oxy fuel(HVOF)-produced coatings. Two powder coating compositions, namely, Ni22Cr10Al1Y alloy powder and Ni22Cr10Al1Y(80 wt%;microsized)–silicon carbide(SiC)(20 wt%;nano(N)) powder, were deposited on a T-22 boiler tube steel. The hot corrosion behavior of bare and coated steels was tested at 900°C for 50 cycles in Na2SO4–60 wt%V2O5 molten-salt environment. The kinetics of corrosion was established with weight change measurements after each cycle. The microporosity and microhardness of the as-coated samples have been reported. The X-ray diffraction,field emission-scanning electron microscopy/energy dispersive spectroscopy, and X-ray mapping characterization techniques have been utilized for structural analysis of the as-coated and hot-corroded samples. The results showed that both coatings were deposited with a porosity less than2%. Both coated samples revealed the development of harder surfaces than the substrate. During hot corrosion testing, the bare T22 steel showed an accelerated corrosion in comparison with its coated counterparts. The HVOF-sprayed coatings were befitted effectively by maintaining their adherence during testing. The Ni22Cr10Al1Y–20 wt%SiC(N) composite coating was more effective than the Ni–22Cr–10Al–1Y coating against corrosion in the high-temperature fluxing process.

关键词： high-velocity oxy fuel thermal spray hot corrosion oxide scale nano-structured coating

Intelligent Multilevel Node Authentication in Mobile Computing Using Clone Node

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Computers, Materials & Continua 2022年第3期70卷 5269-5284页

作者： Neha Malhotra Manju bala I.K.Gujral Punjab Technical University Kapurthala144603India Lovely Professional University Phagwara144411India Khalsa College of Engineering and Technology Amritsar143001India

Nodes in a mobile computing system are vulnerable to clone attacks due to their *** such attacks,an adversary accesses a few network nodes,generates replication,then inserts this replication into the network,potentially resulting in numerous internal network *** existing techniques use a central base station,which introduces several difficulties into the system due to the network’s reliance on a single point,while other ways generate more overhead while jeopardising network *** this research,an intelligent double hashing-based clone node identification scheme was used,which reduces communication and memory costs while performing the clone detection *** approach works in two stages:in the first,the network is deployed using an intelligent double hashing procedure to avoid any network collisions and then in the second,the clone node identification procedure searches for any clone node in the *** first phase verifies the node prior to network deployment,and then,whenever a node wants to interact,it executes the second level of ***-to-end delay,which is bound to increase owing to the injection of clone nodes,and packet loss,which is reduced by the double hashing technique,were used to evaluate the performance of the aforementioned approach.

关键词： Node authentication clone node mobile computing double hashing fault tolerance

Magnesium based implants for functional bone tissue regeneration–A review

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Journal of Magnesium and Alloys 2022年第2期10卷 384-419页

作者： Gavish Uppal Amit Thakur Amit Chauhan Saroj bala University Institute of Engineering and Technology Panjab Universitysector-14ChandigarhIndia Sri Guru Gobind Singh College Panjab Universitysector-26ChandigarhIndia

Magnesium(Mg)has emerged as one of the third-generation biomaterials for regeneration and support of functional bone *** is a better choice over permanent implants such as titanium,stainless steel,cobalt-chrome as magnesium is biodegradable and does not require a second surgery for its removal after bone tissue *** also reduces the risk of stress shielding as its elastic modulus is closer to human bone in comparison to permanent implants and other biodegradable metallic implants based on Iron and *** importantly,Mg is osteoconductive thus stimulates new bone formation and possess anti-bacterial properties hence reducing the risk of failure due to *** its advantages,a major concern with pure Mg is its rapid bio-corrosion in presence of body fluids due to which the mechanical integrity of the implant deteriorates before healing of the tissue is *** properties of Mg-based implants can be enhanced by mechanical processing,alloying,and topology *** reduce the corrosion/degradation rate,Mg has been alloyed with metals,reinforced with ceramics,and surface coatings have been applied so that the degradation rate of Mg-based implant matches with that of healing rate of bone *** present review discusses the effect of alloying elements and reinforcing ceramics on microstructure,mechanical,and corrosion properties of Mg-based orthopedic *** addition,the biocompatibility of Mg-based alloys,composites,and coatings applied on Mg implants has been ***,different methods of fabricating porous implants have been highlighted as making the implant porous facilitates the growth of new bone tissue through the pores.

关键词： Magnesium Biodegradable orthopedic implant Porous structure Osteo-conductive Antibacterial

Regulatory role of peroxynitrite in advanced glycation end products mediated diabetic cardiovascular complications

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World Journal of Diabetes 2024年第3期15卷 572-574页

作者： Asis bala Pharmacology and Drug Discovery Research Laboratory Division of Life SciencesInstitute of Advanced Study in Science and TechnologyGuwahati 781035AssamIndia

The Advanced Glycation End Products(AGE)binding with its receptor can increase reactive oxygen species(ROS)generation through specific signaling *** effect of superoxide(O2-)and O2-mediated ROS and reactive nitrogen species depends on their concentration and location of *** oxide(NO)has anti-inflammatory and anticoagulant properties and a vasodilation effect,but NO can be deactivated by reacting with O_(2)^(-).This reaction between NO and O2-produces the potent oxidant ONOO−.Therefore,ONOO-'s regulatory role in AGEs in diabetic cardiovascular complications must considered as a regulator of cardiovascular complications in diabetes.

关键词： Diabetes Cardiovascular complication Advanced glycation end products Reactive oxygen species Reactive nitrogen species Peroxynitrite

Implementation and Validation of the Optimized Deduplication Strategy in Federated Cloud Environment

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Computers, Materials & Continua 2022年第4期71卷 2019-2035页

作者： Nipun Chhabra Manju bala Vrajesh Sharma I.K.Gujral Punjab Technical University Jalandhar144603india

Cloud computing technology is the culmination of technical advancements in computer networks,hardware and software capabilities that collectively gave rise to computing as a *** offers a plethora of utilities to its clients worldwide in a very cost-effective way and this feature is enticing users/companies to migrate their infrastructure to cloud *** by its gigantic capacity and easy access clients are uploading replicated data on cloud resulting in an unnecessary crunch of storage in *** data compression techniques came to rescue but none could serve the purpose for the capacity as large as a cloud,hence,researches were made to de-duplicate the data and harvest the space from exiting storage capacity which was going in vain due to duplicacy of *** providing better cloud services through scalable provisioning of resources,interoperability has brought many Cloud Service Providers(CSPs)under one umbrella and termed it as Cloud *** policies have been devised for private and public cloud deployment models for searching/eradicating replicated copies using hashing *** the exploration for duplicate copies is not restricted to any one type of CSP but to a set of public or private CSPs contributing to the *** was found that even in advanced deduplication techniques for federated clouds,due to the different nature of CSPs,a single file is stored at private as well as public group in the same cloud federation which can be handled if an optimized deduplication strategy be rendered for addressing this ***,this study has been aimed to further optimize a deduplication strategy for federated cloud environment and suggested a central management agent for the *** was perceived that work relevant to this is not existing,hence,in this paper,the concept of federation agent has been implemented and deduplication technique following file level has been used for the accomplishment of this approa

关键词： Federation agent deduplication in federated cloud central management agent for cloud federation interoperability in cloud computing bloom filters cloud computing cloud data storage

Chikungunya infection:A potential re-emerging global threat

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Asian Pacific Journal of Tropical Medicine 2016年第10期9卷 910-915页

作者： Shanmugaraj bala Murugan Ramalingam Sathishkumar Plant Genetic Engineering Laboratory Department of BiotechnologyBharathiar University

Infectious diseases are indeed a lifelong threat to everyone irrespective of age, sex, lifestyle and socio-economic status. The infectious diseases have persisted among the prominent causes of death globally. Recently, re-emergence of Chikungunya viral infection harmed many in Asian and African countries. Chikungunya was considered as a major threat in developing and underdeveloped countries; the recent epidemiological outbreak of Chikungunya in La Reunion urges the global researchers to develop effective vaccine against this viral disease. In this review, Chikungunya, pathogenesis and epidemiology were briefly described.

关键词： Aedes mosquitoes Alphavirus Arthropod-borne disease Chikungunya Non-Structural Proteins Structural Proteins

Analytical modeling of drain current and RF performance for double-gate fully depleted nanoscale SOI MOSFETs

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Journal of Semiconductors 2012年第2期33卷 28-35页

作者： Rajiv Sharma Sujata Pandey Shail bala Jain Department of Electronics and Communication Engineering Guru Gobind Singh Indraprastha UniversityDelhiIndia Department of Electronics and Communication Engineering Amity UniversitySector-125 NoidaIndia

A new 2D analytical drain current model is presented for symmetric double-gate fully depleted nanoscale SOI *** of device parameters like transconductance for double-gate fully depleted nanoscale SOI MOSFETs is also carried *** this work is concluded by modeling the cut-off frequency, which is one of the main figures of merit for analog/RF performance for double-gate fully depleted nanoscale SOI *** results of the modeling are compared with those obtained by a 2D ATLAS device simulator to verify the accuracy of the proposed model.

关键词： double-gate fully depleted silicon-on-insulator Poisson's equation radio frequency ATLAS

Active Damping of Milling Vibration Using Operational Amplifier Circuit

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Chinese Journal of Mechanical Engineering 2018年第5期31卷 58-65页

作者： Bashir bala Muhammad Min Wan Yang Liu Heng Yuan School of Mechanical Engineering Northwestern Polytechnical University

The problem of chatter vibration is associated with adverse consequences that often lead to tool impairment and poor surface finished in a workpiece, and thus, controlling or suppressing chatter vibrations is of great significance to improve machining quality. In this paper, a workpiece and an actuator dynamics are considered in modeling and controller design. A proportional-integral controller(PI) is presented to control and actively damp the chatter vibration of a workpiece in the milling process. The controller is chosen on the basis of its highly stable output and a smaller amount of steady-state error. The controller is realized using analog operational amplifier circuit. The work has contributed to planning a novel approach that addresses the problem of chatter vibration in spite of technical hitches in modeling and controller design. The method can also lead to considerable reduction in vibrations and can be beneficial in industries in term of cost reduction and energy saving. The application of this method is verified using active damping device actuator(ADD) in the milling of steel.

关键词： Active damping Anti-windup Bending moment Milling process Workpiece vibration Operational amplifier Proportional integral controller