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Mathematical Analysis of Process Parameters in Drilling of Various Aluminium Matrix Composites Using TOPSIS

IOP Conference Series: Materials science and engineering 2021年第1期1126卷

作者： S Senthil Babu C Dhanasekaran Research Scholar VELS Institute of Science Technology & Advanced Studies Chennai. India Professor & Head Department of Mechanical Engineering VELS Institute of Science Technology & Advanced Studies Chennai. India

Drilling is one of the major material removal processes to produce holes and the key parameters involved in the process are speed of the drilling tool and feed rate of the tool into the work piece to be machined. A conventional study would include the diameter of the drill bit as a key geometric feature that affects the output parameters: thrust, torque, roundness error and the surface roughness. Drilling experiments are performed on three different hybrid composite specimen of Al6061 alloy. Keeping the diameter constant and by varying the point angle of the tool, drilling is performed and the responses of the output parameters are recorded and tabulated. Using the data from the experiment, analysis of the data is done by one of the multi-criteria decision analysis method, TOPSIS. This method is used to determine the optimal condition to drill a particular specimen of the composite. In TOPSIS method, the data is ranked based on performance of the drill, to find the parameters which are ideal to obtain a hole with minimum roughness, circularity error and thrust force. But it is enough to keep the goal as minimum roughness because the other parameters will invariably get minimized as they are dependent

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Optimization of Dissimilar aluminum alloy by Friction stir welding Process Control variables with Multiple Objectives

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Journal of Physics: Conference Series 2021年第1期2040卷

作者： S.D. Kumar R. Pugazhenthi S. Ajith Arul Danial G. Swaminathan Research Scholar Department of Mechanical Engineering Department of Mechanical Engineering Vels Institute of Science and Technology and Advanced Studies Chennai-117. Professor Department of Mechanical Engineering Department of Mechanical Engineering Vels Institute of Science and Technology and Advanced Studies Chennai-117. Assistant Professor Department of Mechanical Engineering Department of Mechanical Engineering Vels Institute of Science and Technology and Advanced Studies Chennai-117. Assistant Professor Department of mechanical Engineering SRM Institute of Science and Technology Ramapuram Campus Chennai-89

The progress of FSW has offered a different approach for fabricating superior class weld. This paper deals with optimization of process control variables influencing weld features in customized friction stir butt welding having multiple objectives of 6 mm thick dissimilar plates of AA7075 and AA6101 using Taguchi grey relational approach. The L27 orthogonal array has been employed to Obtain the experimental trails and the joints have been fabricated in a laboratory stage friction stir welding equipment by changing tool rotation speed, worktable translational speed, tool plunge force and tool pin shape. After welding, tensile and impact strength of the weld have been evaluated and found that optimum ultimate tensile strength of 129 Mpa., maximum yield strength of 119.21Mpa, maximum % of elongation 24.64% and impact strength 23Mpa simultaneously in FSW process variables of Tool rotation speed is 1200 rpm, transvers speed of 30 mm/min and axial force is at 5 kN. Based on the experimental results optimum levels of process control variables were obtained using grey relation rating and compared with confirmation test.

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A Review on Nano-Casing Of Jet Engine And Diesel Engine Using Single-Walled Carbon Nanotubes

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Materials Today: Proceedings 2019年 18卷 5464-5471页

作者： Indradeep Kumar C. Dhanasekaran Department of Mechanical Engineering Vels Institute of Science Technology & Advanced Studies (VISTAS) Chennai-600117 India HoD Department of Mechanical Engineering Vels Institute of Science Technology & Advanced Studies (VISTAS) Chennai-600117 India

In the modern age, nanotechnology is found to be beneficial in different spheres as in few industries. The aviation industry is one of them. As the properties of materials vary a lot in nanomaterials compared to the bulk material, the development of any field relies on the fact that these materials are much advantageous than bulk metals. Now a day's Single-Walled Carbon nanotubes (SWCNTs) having greatest attention on the earth. This paper presents the review of the reduction in weight by the replacement of conventional engine casing material which results in the trimming of fuel consumption as well as enhances the strength of the engine..

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Precursory study on varieties of DDoS attacks and its implications in Cloud Systems

Precursory study on varieties of DDoS attacks and its implic...

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International Conference on Trends in Electronics and Informatics (ICEI)

作者： Jones S.B Ribin N. Kumar Dept. of Computer Science & Engineering Vels Institute of Science Technology and Advanced Studies Chennai India

Cloud Computing has emerged into an inevitable platform for computing services by effectively implementing Service Oriented Architecture (SOA) and Virtualization. However it is still vulnerable to traditional security threats and offers scope for innovative security attacks such as EDoS [1]. While it offers platform to generate innumerable Virtual components from a single physical component, it inadvertently provides wide spectrum of possibilities for distributed attacks. Moreover such attacks have adapted to cloud platform and have exploited various inherent vulnerabilities. In an unprecedented manner, they became unpredictable, evasive and challenging to Cloud Security measures. Therefore various versions of DDoS attack that targets the cloud platform have been extensively researched and narrated. The Cloud Security faces unprecedented challenges such as the Single-point-of-Failure occurs when a Cloud Supervisory Component or hypervisor fails due to a security breach. Moreover Cloud requirements often require being liberal to meet the Clients needs. This does not help the CSP to adapt traditional stringent security measures in Cloud System the reasons have been discussed in details.

关键词： Cloud computing computer crime Servers Virtual machine monitors Floods Protocols Botnet

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Analysis of silica based prosthetic human teeth using 3D printing machine for dental assistance

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Materials Today: Proceedings 2021年 45卷 2440-2443页

作者： T. Blesslin Sheeba A. Albert Raj D. Ravikumar S. Sheeba Rani P. Vijayakumar Ram Subbiah Department of ECE R.M.K. Engineering College Kavaraipettai 601206 Tamil Nadu India Department of ECE Sri Krishna College of Engineering and Technology Coimbatore 641008 Tamil Nadu India Department of ECE Vels Institute of ScienceTechnology & Advanced Studies (VISTAS)Chennai 600117 Tamil Nadu India Department of EEE Sri Krishna College of Engineering and Technology Coimbatore 641 008 Tamil Nadu India School of Electronics Engineering Vellore Institute of Technology Chennai 600127 Tamil Nadu India Department of Mechanical Engineering Gokaraju Rangaraju Institute of Engineering & Technology Hyderabad 500 090 Telangana India

In recent years, most of the peoples are suffering from teeth issues. Increased cavities of the teeth are formed due to these issues. Cavities may lead to the fracturing of human teeth. Such partial dentures and affected teeth can cause patients to experience brutal problems. There is a risk to break teeth when having injuries which can lead to serious patient issues. Doctors tend to substitute original teeth with artificial teeth in order to reduce these issues. These artificial teeth are made up of chromium and zirconium materials in current innovations, which can cause high cost and time-taking processes for the manufacture of artificial teeth by using these types of materials. A new, revolutionary 3D printing technology is being used to prepare artificial teeth to reduce these factors. In this work, an attempt was made to create artificial teeth using Silica material via a 3D printing technique. The prototype model teeth model with silica material was manufactured and it’s demonstrates to medical students and patients. Using modeling software (CATIA) and Analysis software (ANSYS) the necessary components were designed and the corresponding results were reported.

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OFDM based orthogonal and non-orthogonal multi carrier modulation 5G waveforms performance investigation

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AIP Conference Proceedings 2022年第1期2519卷

作者： G. T. Bharathy V. Rajendran 1Department of ECE Jerusalem College of EngineeringChennai India 2Department of ECE Vels Institute of Science Technology & Advanced Studies (VISTAS) Chennai India

A novel waveform in 5G ought to facilitate supple coexistence with the intention to sustain varied service and deployment state of affairs in a carrier band and offer incredibly superior spectrum localization, at the same time inheriting the benefits of Orthogonal Frequency Division Multiplexing. The candidate for the above requirements is classified as Orthogonal based OFDM waveform and Non Orthogonal based OFDM waveform with multi carriers. In this paper, a detailed investigation, simulation, comparison and analysis of Filtered-OFDM (F-OFDM), Universal Filtered Multi Carrier which are OFDM based orthogonal waveform and Filter Bank Multi Carrier (FBMC) which is a OFDM based non orthogonal waveform is carried out. The simulation is accomplished by means of Matlab R2020 software at a frequency of 15 MHz, Signal to Noise Ratio of 18dB with diverse modulations like QPSK, 16QAM, 64QAM and 256QAM. The performance evaluation metrics like Bit Error Rate (BER), Signal Power, Power Spectral Density (PSD) and the Peak to Average Power Ratio (PAPR) is evaluated and the comparison of the simulation results illustrates that the FBMC is an efficient method and a better candidate for 5G applications.

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Internet security protocol for secure data transmission using OSPF and BGP

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AIP Conference Proceedings 2022年第1期2463卷

作者： D. Ravikumar M. Prasath Nikhil U. Kumar V. Devi P. Vijayalakshmi 1Department of Electronics and Communication Engineering Kings Engineering College Chennai India 2Departments of Electronics & Communication Engineering Vels Institute of Science Technology & Advanced Studies (VISTAS) Chennai India 3Departments of Computer Applications Gurunanak College Chennai India

Internet Protocol Security (IPsec) is a secure network protocol suite that authenticates and encrypts data packets to offer safe encrypted communication between two computers over an IP network. It’s a protocol that’s utilized in virtual private networks. In this proposed work, we are providing secure path for better packet transmission between transmitter and receiver. For safe and secure data transmission, we are developing two routing algorithms namely Open Shortest Path First and Border Gateway Protocol which are designed for packaging along with switch routing. This embedded algorithm of both OSPF and BGP protocols enhances Internet Protocol security for secure data transmission in networking domain.

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Disposable cerium oxide/graphene nanosheets based sensor for monitoring acebutolol in environmental samples and bio-fluids

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Journal of Environmental Chemical engineering 2022年第2期10卷

作者： Selvi, Subash Vetri Nataraj, Nandini Chen, Tse-Wei Chen, Shen-Ming Balu, Prakash Liu, Xiaoheng Electroanalysis and Bioelectrochemistry Lab Department of Chemical Engineering and Biotechnology National Taipei University of Technology No. 1 Section 3 Chung-Hsiao East Road Taipei106 Taiwan Research and Development Center for Smart Textile Technology National Taipei University of Technology No.1 Section 3 Chung-Hsiao East Road Taipei106 Taiwan Department of Materials Imperial College London LondonSW7 2AZ United Kingdom Key Laboratory of Education Ministry for Soft Chemistry and Functional Materials Nanjing University of Science and Technology Nanjing210094 China Department of Biotechnology School of Life Science Vels Institute of Science Technology and Advanced Studies ChennaiTamilnadu India

The production and utilization of medicines strives to be an essential factor in the modern world in treatment, diagnosis and prevention. On the other hand, the medical discharge and the unmetabolized drugs all turns out into environmental polluting agents. The demand for detecting and solving these issues are essential. Herein, we report an electrochemical sensor for quantifying β-adrenoreceptor blocker acebutolol (ACT) in environmental and biological samples. Cerium oxide (CeO2) was implied with graphene nanosheets (GNS) as highly conducting material for electrochemically detecting ACT. The structural and morphological studies were studied and electrochemical analysis were also performed to efficiently study oxidation mechanism of ACT at CeO2/GNS interface. Electrochemical impedance spectroscopy (EIS) proved the higher conducting behavior of CeO2/GNS. Moreover, CeO2/GNS/SPCE holds higher surface area with more edge sites facilitating the electro-oxidation of ACT. The linear range of detecting ACT was in the range of 0.039 μM to 486.6 μM. The limit of detection was found to be 0.007 μM with the sensitivity about 27.3 μAμM−1cm−2. The real samples like river water and urine samples were utilized for real time detection of ACT. Thus, the fabricated electrode with more efficiency and higher conducting property will enhance the real time sensing of ACT in environmental and biological samples. © 2022 Elsevier Ltd

关键词： Cerium oxide

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Computational Modelling Of Nano-Composites (Single Walled Carbon Nanotubes) For Engine

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Materials Today: Proceedings 2019年 18卷 4210-4216页

作者： Indradeep Kumar C. Dhanasekaran Department of Mechanical Engineering VELS Institute of Science Technology & Advanced Studies (VISTAS) Chennai 600117 India

Nanomaterials constitute a prominent sub-discipline in the materials science. Conventional materials like glass, ceramic, metals, polymers or semiconductors can be formed in a nanoscale proportion. They have various microstructural distinctive attributes such as nano-discs, nanotubes, nanocoatings, quantum dots, nanocomposites, and nanowires. The unique properties of nanoparticle derived materials and devices depend directly on the size and structure-dependent properties. This Paper shows the modern design requirements with the help of simulation to assure the properties of engine like faster, miniature, highly maneuverable, self-healing, lightweight warrant for materials, intelligence guided, smart, eco-friendly, with extraordinary mechanical and multifunctional properties while making the engine parts.

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Comparative analysis of CP-OFDM and F-OFDM schemes for cognitive networks

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AIP Conference Proceedings 2022年第1期2385卷

作者： T. Tamilselvi V. Rajendran G. T. Bharathy 1Department of ECE Jerusalem College of Engineering Chennai India 2Department of ECE Vels Institute of Science Technology & Advanced Studies (VISTAS) Chennai India

The 5G wireless communication requires transmission of information with high data rate, channel capacity, QoS in addition to less PAPR. The modulation scheme is performed in the physical layer of the network. Multi Carrier Modulation (MCM) schemes are widely preferred over single carrier modulation. Orthogonal Frequency Division Multiplexing (OFDM) is a very competent modulation method used in 4G wireless communication systems. This paper concentrates on the principle, analysis and comparison of Cyclic Prefix OFDM (CP-OFDM) with the Filtered OFDM (F-OFDM) at a frequency of 15 MHz, SNR of 18dB for various modulations like QPSK, 16QAM, 64QAM and 256QAM. F-OFDM is a flexible form of OFDM technique with lesser value of the peak to average power ratio (PAPR) allowing it to be used in the 5G wireless applications.

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