Design and Optimization of Friction Stir Welding of Al-Cu BUTT Joint Configuration using Taguchi Method
subject: ANOVA; Friction stir welding; Hardened OHNS steel tool; Taguchi L9 orthogonal array; tool pin offset
description: Friction stir welding (FSW) is a solid-state welding technique in which the joint quality was predominantly subjected to heat formation throughout the metal welding process. The weld joint produced from FSW was better than the other fusion welding process. In this research, the base plates AA6101 and C11000 of 5 mm thickness were joined using the hardened oil-hardened non-shrinkable steel(OHNS) tool by the FSW method. The design of experiment (DOE) was used to optimize the input parameters such as tool rotational speed (rpm), feed rate (mm/min), and tool pin offset (mm) on output parameter ultimate tensile strength (UTS). The design of experiment (DOE) was carried out by employing a Taguchi L9 orthogonal array, three factors, and three levels for obtaining a quality joint with good strength. The results of nine trial runs from the Taguchi experimental approach were formulated and analyzed using the statistical tool analysis of variance (ANOVA) using MINITAB 19 software. ANOVA analysis was employed to find the contribution of the input parameters toward the output. The optimized input process parameters will help to create effective weld joints. This study revealed that tool pin offset towards softer metal at medium tool rotational speed would create joints with the highest UTS. Scanning Electron Microscope (SEM) was applied to investigate the structural changes in the FSW of Al-Cu joints. 2022, Books and Journals Private Ltd.. All rights reserved.
creator: Pratap Kumar J.; Raj A.; Ramesha K.; Rout I.S.
source: Journal of Mines, Metals and Fuels, Vol-70, No. 8, pp. 471-479.
publisher: Books and Journals Private Ltd.
date: 2022-01-01
rights: All Open Access; Hybrid Gold Open Access
relation: ISSN: 222755; CODEN: JMMFA
format: Online
language: English
type: Article
coverage: Pratap Kumar J., Department of Mechanical and Automobile Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560074, India; Raj A., Department of Mechanical and Automobile Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560074, India; Ramesha K., Department of Mechanical and Automobile Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560074, India; Rout I.S., Department of Mechanical and Automobile Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560074, India

Design and optimization of the process parameters for friction stir welding of dissimilar aluminium alloys
subject: Aluminium; Design; Friction; Optimization; Stir; Welding
description: Friction Stir Welding (FSW) is one of the unique solid state welding technique that is fast gaining importance because of its ability to produce strong joints. The friction stir welding technique is effectively used in this research to join 5 mm thick dissimilar aluminium alloys of AA 7075-O and AA 5052-O grade. The effect of tool pin profile and tool rotational speed on the mechanical properties like micro-hardness and tensile strength are studied by the optimized Design of Experiments (DOE). The experiments are designed based on L16 orthogonal array considering TAGUCHI techniques for four design parameters and four parametric levels. The outcomes of experimental techniques are tabulated and TAGUCHI analysis, Analysis of Variance (ANOVA) are carried out in Minitab software. From the experimental results and statistical techniques, the methodology is validated and the outcomes of the experiments are found to be in close agreement with the statistical results with the error less than 5% of the mean difference value. The optimized process parameters for better micro hardness are as follows: tool rotational speed of 1200 rpm, feed of 120 mm/min, tool offset of 1 mm, and cylindrical tapered pin tool profile; while the optimized design of process parameters for better tensile strength are as follows: tool rotational speed of 1400 rpm, feed of 120 mm/min, tool offset of 1 mm and cylindrical tapered pin profile. The design and optimization of the process parameters for friction stir welding of dissimilar aluminium alloys is necessary for high strength weld joints. 2021, Paulus Editora. All rights reserved.
creator: Ramesha K.; Sudersanan P.D.; Santhosh N.; Jangam S.
source: Engineering and Applied Science Research, Vol-48, No. 3, pp. 257-267.
publisher: Paulus Editora
date: 2021-01-01
rights: Restricted Access
relation: ISSN: 25396161
format: Online
language: English
type: Article
coverage: Ramesha K., Department of Mechanical Engineering, Dr T Thimmaiah Institute of Technology (Affiliated to Visvesvaraya Technological University), Kolar Gold Fields (K.G.F.), Karnataka, 563120, India, Department of Mechanical and Automobile Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, Karnataka, 560074, India; Sudersanan P.D., Department of Mechanical Engineering, Dr T Thimmaiah Institute of Technology (Affiliated to Visvesvaraya Technological University), Kolar Gold Fields (K.G.F.), Karnataka, 563120, India; Santhosh N., Department of Mechanical Engineering, MVJ College of Engineering, Near ITPB, Whitefield, Bangalore, Karnataka, 560067, India; Jangam S., Department of Mechanical and Automobile Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, Karnataka, 560074, India

Design and optimization of the process parameters for fusion deposition modelling by experimental and finite element approach
subject: Deposition; Design; Fused; Modelling; Optimization; Parameters; Process
description: Fused Deposition Modelling (FDM) is a rapidly evolving technology since the last couple of years. This method is also used for rapid prototyping, which uses layer on top of layer deposition of the material using hot extruders to build a given 3D model. 3D printing technology basically a tool-less process designed specifically to avoid assembly requirements with intricate geometry and complex features created at no extra cost and at the same time it is an energy-efficient technology that can provide environmental efficiencies in terms of both the manufacturing process and material utilization. This research primarily focuses on analyzing the critical process parameters and its influence on the properties of the components made out of FDM process. The FDM specimens are fabricated by using four factors (parameters) at three levels, and the factors are layer thickness, travel speed of the extruder, infill ratio, and infill density. The experiments are designed based on Taguchi L-9 orthogonal array. Total three responses are considered and they are tensile strength compressive strength and flexural strength. Taguchi analysis has done to optimize the factors and its levels. Finite element analysis has also done and compared with the experimental results. 2022 Author(s).
creator: Joseph K.; Jangam S.; Ramesha K.; Umesh V.; Kumar G.V.; Santhosh N.; Shankar G.; Razak A.; Afzal A.; Praveena B.A.
source: AIP Conference Proceedings, Vol-2421
publisher: American Institute of Physics Inc.
date: 2022-01-01
rights: Restricted Access
relation: ISSN: 0094243X; ISBN: 978-073544173-6
format: Online
language: English
type: Conference paper
coverage: Joseph K., Department Of Mechanical And Automobile Engineering, School Of Engineering And Technology, Christ (Deemed To Be University), Karnataka, Bengaluru, India; Jangam S., Department Of Mechanical And Automobile Engineering, School Of Engineering And Technology, Christ (Deemed To Be University), Karnataka, Bengaluru, India; Ramesha K., Department Of Mechanical And Automobile Engineering, School Of Engineering And Technology, Christ (Deemed To Be University), Karnataka, Bengaluru, India; Umesh V., Department Of Mechanical And Automobile Engineering, School Of Engineering And Technology, Christ (Deemed To Be University), Karnataka, Bengaluru, India; Kumar G.V., Mechanical Engineering Department, P V P Siddhartha Institute Of Technology, Andhra Pradesh, Vijayawada, India; Santhosh N., Department Of Mechanical Engineering, Mvj College Of Engineering, Karnataka, Bengaluru, India; Shankar G., Department Of Mechanical Engineering, Mvj College Of Engineering, Karnataka, Bengaluru, India; Razak A., Department Of Mechanical Engineering, P.A.College Of Engineering, Karnataka, Mangalore, India; Afzal A., Department Of Mechanical Engineering, P.A.College Of Engineering, Karnataka, Mangalore, India; Praveena B.A., Department Of Mechanical Engineering, Nitte Meenakshi Institute Of Technology, Karnataka, Bengaluru, India

Design and optimization of three class object detection modalities for manufacturing steel surface fault diagnosis and dimensionality classification
subject: Dimensionality classification; Fault diagnosis; Modalities; Object detection; Optimization; Steel surface
description: The main objective of this research is to create and improve three different object identification techniques for identifying surface flaws and categorising dimensions in steel that has been fabricated. RetinaNet, YOLOv3, and Faster R-CNN are the selected modalities in the experiment. The main goal is to evaluate these modalities' ability to detect and classify defects on steel surfaces in terms of accuracy, precision, recall, and F1 score. This assessment makes use of a varied collection of steel surface photos that show different kinds and sizes of faults. Training, validation, and testing sets make up the dataset's partitioning. The training set is used to train and optimise the three modalities, while the testing and validation sets are used to evaluate their performance. According to the study's findings, all three methods provide excellent of 0.92. RetinaNet comes in second with an F1 score of 0.89, followed by YOLOv3 with an F1 score of 0.87, while the Faster R-CNN modality obtains the greatest overall performance with an F1 score. The Author(s) under exclusive licence to The Society for Reliability Engineering, Quality and Operations Management (SREQOM), India and The Division of Operation and Maintenance, Lulea University of Technology, Sweden 2024.
creator: Sinha A.; Sharma V.; Alkhayyat A.; Suman; Kumar B.; Singh N.; Singh A.K.; Pandey S.
source: International Journal of System Assurance Engineering and Management, Vol-15, No. 10, pp. 4947-4965.
publisher: Springer
date: 2024-01-01
rights: Restricted Access
relation: ISSN: 9756809
format: Online
language: English
type: Article
coverage: Sinha A., Computer Science Department, ICFAI Tech School, ICFAI University, Jharkhand, Ranchi, 835222, India; Sharma V., Computer Science Department, Christ University, Bengaluru, 560029, India; Alkhayyat A., College of Technical Engineering, The Islamic University, Najaf, Iraq; Suman, Department of Computer Science, Jagan Institute of Management Studies, Rohini, Delhi, 110085, India; Kumar B., Department of Computer Science and Engineering, Amity University Jharkhand, Jharkhand, Ranchi, 834002, India; Singh N., Department of Information Technology, Bharati Vidyapeeths College of Engineering, Paschim Vihar, Delhi, New Delhi, 110063, India; Singh A.K., Department of Production and Industrial Engineering, Birla Institute of Technology, Mesra, Ranchi, 835215, India; Pandey S., Marwadi University Research Center, Faculty of Management Studies, Marwadi University, Gujarat, Rajkot, 360003, India

Design and performance analysis of braking system in an electric vehicle using adaptive neural networks
subject: Adaptive; Control system; Electric vehicle; Electronic control unit; Fuzzy systems; Neural networks; Regenerative braking
description: Research article emphasizes on the impact of braking concepts considering regenerative braking system and energy consumption aspects in electric vehicles through a new perspective. The electric vehicle system is modeled and simulated using the MATLAB/Simulink software. A dataset is developed using the virtual simulation environment created by co-simulation using the MATLAB/Simulink and the IPG Carmaker software. This dataset is also used in a neural network model based on adaptive neuro fuzzy logic and the system performance is analyzed. Parameters considered for training the neural network are the brake pedal displacement, braking change rate and the need for brake application. The highlight of this study is the focus on a front wheel driven electric vehicle, which uses a standard drive cycle input to validate the model. The significant parameters evaluated in this study include the braking effects, kinetic energy, regenerative braking torque, battery state of the charge and the motor torque. The torque generation and its intended braking force requirements based on the acceleration, deceleration and braking conditions are the notable observations. The regenerative capability of this proposed system design is also illustrated along with the surface plots based on the training dataset. Investigation and analysis reveal that, the battery state of charge could be revived throughout the drive with a steady and stable increase. Transitions of motor torques between tractive and regenerative phases are also illustrated and explained for clarity and brevity. 2023 Elsevier Ltd
creator: Indu K.; Aswatha Kumar M.
source: Sustainable Energy, Grids and Networks, Vol-36
publisher: Elsevier Ltd
date: 2023-01-01
rights: Restricted Access
relation: ISSN: 23524677
format: Online
language: English
type: Article
coverage: Indu K., ECE, CHRIST (Deemed to be University), Bengaluru, Karnataka, India; Aswatha Kumar M., ECE, CHRIST (Deemed to be University), Bengaluru, Karnataka, India

Design and performance analysis of eight channel demultiplexer using 2D photonic crystal with trapezium cavity
subject: crosstalk; DWDM demultiplexer; photonic crystal; quality factor; resonant wavelength; trapezium
description: In this work, an eight-channel dense wavelength division multiplexing demultiplexer is designed with a 2D photonic crystal triangular lattice. The proposed demultiplexer consists of a centre bus waveguide, an isosceles trapezium resonant cavity, and an eight-circular ring cavity (CR1, CR2, CR3, CR4, CR5, CR6, CR7, and CR8). The point defect resonant cavity consists of seven rods to drop different wavelengths from eight cavities, each of eight drop waveguides. The design is very simple to realise. The finite difference time domain and plane wave expansion method methods were used to analyse the proposed designs band structure and transmission spectrum. The resonant wavelengths are 1.5441 ?m, 1.5443 ?m, 1.544 49 ?m, 1.5447 ?m, 1.5449 ?m, 1.5451 ?m, 1.5453 ?m, and 1.5455 ?m respectively. The proposed device provides a high-quality factor, transmission efficiency, and low crosstalk. The devices footprint is 490.0 ?m2, which can be easily incorporated into photonic integrated circuits. 2023 IOP Publishing Ltd.
creator: Kavitha V.; Balaji V.R.; Dhanabalan S.S.; Sridarshini T.; Robinson S.; Radhouene M.; Hegde G.; Sugesh R.G.J.
source: Journal of Optics (United Kingdom), Vol-25, No. 6
publisher: Institute of Physics
date: 2023-01-01
rights: All Open Access; Green Open Access
relation: ISSN: 20408978
format: Online
language: English
type: Article
coverage: Kavitha V., Mount Zion College of Engineering and Technology, Tamil Nadu, Pudukkottai, India; Balaji V.R., School of Electronics Engineering, School of Electronics Engineering, Vellore Institute of Technology, Tamil Nadu, Chennai, India; Dhanabalan S.S., Functional Materials and Microsystems Research Group, School of Engineering, RMIT University, Melbourne, VIC, Australia; Sridarshini T., Department of Electronics and Communication Engineering, PSG College of Technology, Tamil Nadu, Coimbatore, India; Robinson S., Mount Zion College of Engineering and Technology, Tamil Nadu, Pudukkottai, India; Radhouene M., University of Tunis El Manar, National Engineering School of Tunis Communication Systems, Tunis, LR-99-ES21, Tunisia; Hegde G., Center for Bio Systems Science and Engineering, Indian Institute of Science, Karnataka, Bengaluru, India; Sugesh R.G.J., Department of Electronics and Communication Engineering, School of Engineering and Technology, CHRIST University, Karnataka, Bengaluru, India

Design and performance evaluation of a multi-load and multi-source DC-DC converter for efficient electric vehicle power systems
subject: DC-DC converter; Electric vehicle power systems; Energy-efficient electric vehicles; High-efficiency power conversion; Modular converter design; Multi-load power distribution; Multi-source energy management; Solar energy integration
description: This paper introduces the design and comprehensive performance evaluation of a novel Multi-Load and Multi-Source DC-DC converter tailored for electric vehicle (EV) power systems. The proposed converter integrates a primary battery power source with a secondary renewable energy sourcespecifically, solar energyto enhance overall energy efficiency and reliability in EV applications. Unlike conventional multi-port converters that often suffer from cross-regulation issues and limited scalability, this converter ensures stable power distribution to various EV subsystems, including the motor, air conditioning unit, audio systems, and lighting. A key feature of the design is its ability to independently manage multiple power loads while maintaining isolated outputs, thus eliminating the inductor current imbalance that is common in traditional systems. Experimental validation using a 100W prototype demonstrated the converters ability to deliver stable 24V and 48V outputs from a 12V input, with output voltage deviations kept within 1%, significantly improving upon the 5% deviations typically seen in existing converters. Furthermore, the system achieved an impressive 93% efficiency under variable load conditions. The modular nature of the converter makes it not only suitable for EV applications but also for a broader range of industries, including renewable energy systems and industrial power supplies. This paper concludes by discussing optimization strategies for future improvements and potential scaling of the technology for commercial use in sustainable energy applications. The Author(s) 2024.
creator: Singh A.R.; Suresh K.; Parimalasundar E.; Kumar B.H.; Bajaj M.; Tuka M.B.
source: Scientific Reports, Vol-14, No. 1
publisher: Nature Research
date: 2024-01-01
rights: All Open Access; Gold Open Access
relation: ISSN: 20452322; PubMed ID: 39468254
format: Online
language: English
type: Article
coverage: Singh A.R., Department of Electrical Engineering, School of Physics and Electronic Engineering, Hanjiang Normal University, Hubei, Shiyan, 442000, China; Suresh K., Department of Electrical and Electronics Engineering, Christ Deemed to be University, Bangalore, India; Parimalasundar E., Department of Electrical and Electronics Engineering, Mohan Babu University (Erstwhile Sree Vidyanikethan Engineering College), Tirupati, India; Kumar B.H., Department of Electrical and Electronics Engineering, Mohan Babu University (Erstwhile Sree Vidyanikethan Engineering College), Tirupati, India; Bajaj M., Department of Electrical Engineering, Graphic Era (Deemed to be University), Dehradun, 248002, India, Hourani Center for Applied Scientific Research, Al-Ahliyya Amman University, Amman, Jordan, College of Engineering, University of Business and Technology, Jeddah, 21448, Saudi Arabia; Tuka M.B., Department of Electrical and Computer Engineering, College of Engineering, Sustainable Energy Center of Excellence, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia

Design and Realization of a Low-Cost 4 Butler Matrix Antenna Array for C-Band Beamforming
subject: Antenna array; Beamforming; Butler Matrix Network; C-Band; Feed Network
description: The article addresses the design and modelling of a beam-forming antenna array employing a 4 Butler Matrix Network (BMN) for C-band applications. The proposed low-cost antenna is designed and simulated using CST Microwave Studio Suite (V. 2024), and the prototype is fabricated using an in-house PCB manufacturing process. Simulated results demonstrate that the antenna can form beam patterns in four distinct directions (30, 190). The design achieves a wide -10-db bandwidth of 14.5% at 5.575 GHz, along with a narrow bandwidth of 2.5%, 1.07%, 1%, and 2.72% at 4.327, 4.677, 4.99, and 6.6 GHz, respectively. Also, it exhibits very good gain and considerable radiation efficiency. Furthermore, excellent agreement between simulated and experimental results confirms the validity and effectiveness of the proposed design. 2025 IEEE.
creator: Pattanayak, Soumya Sundar; Kumar, Naveen; Shwetha, M.
source: Conference Proceedings - 10th IEEE International RF and Microwave Conference, RFM 2025;
publisher: Institute of Electrical and Electronics Engineers Inc.
date: 01-01-2025
rights: Restricted Access; Hardcopy may be available in the library
relation: ISBN: 979-833158521-1;
language: English
type: Conference paper
coverage: Pattanayak S.S., Department of Electronics and Communication Engineering, Manipal Institute of Technology Bengaluru, Manipal Academy of Higher Education, Manipal, India; Kumar N., Department of Electronics and Communication Engineering, Christ University, Bengaluru, India; Shwetha M., Department of Electronics and Communication Engineering, Manipal Institute of Technology Bengaluru, Manipal Academy of Higher Education, Manipal, India

Design and Simulation of 6.2m Wide-Field Telescope for Spectroscopic Survey
subject: Active Optics; Segmented Mirror Telescope; Spectroscopy; Survey; Wide Field
description: The upcoming large astronomical telescopes are trending towards the Segmented Primary Mirror due to technological advancements & manufacturing feasibility. We have designed a wide-field optical IR spectroscopic survey telescope that can deliver spectra of several millions of astronomical sources. The baseline design of this telescope is a 6.2 m segmented primary mirror with hexagonal mirror segments of 1.44m size, intersegment Edge sensors, and soft positioning actuators. The telescope is designed to provide a 2.5deg FOV achieved through a system of wide field corrector lenses with a design residual ~0.2". Also, it delivers an f/3.61 beam suitable for directly feeding optical fibres. A mechanical concept of the telescope is designed with a truss-based mirror cell to support the segmented primary mirror and keep the deformation to a minimum. As the primary mirror is segmented, the deformation due to different disturbances like wind, vibration and thermal effects must be corrected to a nanometer accuracy to make it act like a monolithic primary mirror. This is achieved through an active control system using three actuators and six inter-segment edge sensors. A simulation tool, codeSMT, is built based on the state-space model of a soft actuator with Multiple-Input Multiple-Output (MIMO) capability to incorporate dynamic wind disturbance from the IAO Hanle site and vibration effects. A detailed error multiplier analysis is performed numerically using this tool and is in good agreement with analytical calculations. A parameter sensitivity analysis is performed to fine-tune the primary mirror control system variables. This paper presents the Optical, Mechanical and Active Control system design approach of a 6.2m wide-field telescope currently under conceptual design. 2024 SPIE.
creator: Deshmukh P.; Sriram S.; Chand T.; Kambhala S.; Ramya S.; Joshi R.; Bharat Kumar Y.; Muthhar M.
source: Proceedings of SPIE - The International Society for Optical Engineering, Vol-13094
publisher: SPIE
date: 2024-01-01
rights: Restricted Access
relation: ISSN: 0277786X; ISBN: 978-151067511-7; CODEN: PSISD
format: Online
language: English
type: Conference paper
coverage: Deshmukh P., Indian Institute of Astrophysics, Bengaluru, 560034, India; Sriram S., Indian Institute of Astrophysics, Bengaluru, 560034, India, CHRIST Deemed to be University, Bengaluru, 560029, India; Chand T., Indian Institute of Astrophysics, Bengaluru, 560034, India; Kambhala S., Indian Institute of Astrophysics, Bengaluru, 560034, India; Ramya S., Indian Institute of Astrophysics, Bengaluru, 560034, India; Joshi R., Indian Institute of Astrophysics, Bengaluru, 560034, India; Bharat Kumar Y., Indian Institute of Astrophysics, Bengaluru, 560034, India; Muthhar M., Indian Institute of Astrophysics, Bengaluru, 560034, India

Design and Simulation of a Multi-purpose Adjustable Modular Robot for Precision Agriculture
subject: Agriculture; Design; GAZEBO; Modeling; Simulation
description: Global population growth, climate change, and labor shortages all represent substantial obstacles to meeting global food needs, and agricultural robots provide a possible solution. This work uses a survey to evaluate user behavior toward using agricultural wheel robots on small farms. The survey was conducted in various parts of India (Coimbatore, Bhubaneswar, and Silchar), where 250 large and medium commercial farmers participated. After the survey, a new robotic system architecture is a multi-purpose, adjustable, modular, and affordable robotic platform designed for precision agriculture. A unique feature is added to the design, which helps the robot to adjust by itself based on the row distances and crop heights. The software was designed using the Fusion 360, and simulation is carried out in GAZEBO and Robot Operating System (ROS). 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
creator: Raut R.S.; Mahanta G.B.; Rout A.; Pattanayak S.K.; Biswal B.B.
source: Smart Innovation, Systems and Technologies, Vol-342, pp. 915-927.
publisher: Springer Science and Business Media Deutschland GmbH
date: 2023-01-01
rights: Restricted Access
relation: ISSN: 21903018; ISBN: 978-981990263-7
format: Online
language: English
type: Conference paper
coverage: Raut R.S., NIT Silchar, Assam, 788010, India; Mahanta G.B., Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham Chennai Campus, Tamil Nadu, Chennai, 6001103, India; Rout A., Department of Mechanical Engineering, Christ University, Karnataka, Bangalore, 560029, India; Pattanayak S.K., NIT Silchar, Assam, 788010, India; Biswal B.B., Department of Industrial Design, NIT Rourkela, Odisha, 769008, India

Design and simulation of CPW fed circular spike antenna for wireless applications
subject: Circular Spike; CPW Fed; Directivity and VSWR; Gain; HFSS; Return Loss
description: The aim of the paper is to design, and simulate circular spike Coplanar Waveguide (CPW) fed antenna for wireless applications. The size of the antenna is very small occupying a space of 36mm 36mm including the substrate board. The antenna is designed using FR-4 substrate of thickness 1.6mm with dielectric permittivity of 4.4. The Coplanar Waveguide (CPW) fed system is used, so we can avoid double side printed board. This proposed antenna covers the bandwidth frequency range from 2.85GHz to 3.31GHZ and 5.09GHz to 5.65GHz for various wireless applications. The antenna design and performance are analyzed by using High Frequency Structure Simulator (HFSS) electromagnetic software for wireless applications according to frequency bands. The results of proposed antenna simulation on return loss, VSWR, gain and directivity are calculated. 2015 IEEE.
creator: Daniel R.S.; Suganthi S.
source: ICIIECS 2015 - 2015 IEEE International Conference on Innovations in Information, Embedded and Communication Systems
publisher: Institute of Electrical and Electronics Engineers Inc.
date: 2015-01-01
rights: Restricted Access
relation: ISBN: 978-147996818-3
format: Online
language: English
type: Conference paper
coverage: Daniel R.S., ECE Department, Trichy Engineering College, India; Suganthi S., ECE Department, Christ University, Kengeri Campus, Bengaluru, India

Design and Stress Analysis of the Frame for an Electric Bike
subject: ANSYS Mechanical APDL; Bicycle frame; Eco-friendly
description: Global emissions have been on the rise since the industrial era because of the increased energy-intensive human activities, which is a direct cause of global warming and climate change. Of the total emissions, around 17% is from the transportation sector, which significantly contributes to the emissions. One of the easiest ways to be more sustainable is to choose electric vehicles instead of Internal combustion engines. Almost 75% of the vehicles registered in India are two-wheelers, but there are no affordable and reliable electric two-wheelers. This research works to optimize and analyze the design of a step-through frame design for an electric bicycle. The frame design is analyzed by providing boundary and loading conditions with two different materials (Steel-AISI4130 and Aluminum AL6061). The numerical analysis is carried out using ANSYS APDL. The result of von Mises stress is 166MPa and 160.4MPa for steel and aluminum, respectively. The result of stress and displacement is within the acceptable limit. The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.
creator: Niranjana S.J.; Shivakumar S.; Raghavendra S.; Ravikumar H.C.
source: Smart Innovation, Systems and Technologies, Vol-409 SIST, pp. 207-215.
publisher: Springer Science and Business Media Deutschland GmbH
date: 2024-01-01
rights: Restricted Access
relation: ISSN: 21903018; ISBN: 978-981977093-9
format: Online
language: English
type: Conference paper
coverage: Niranjana S.J., Department of Mechanical and Automobile Engineering, CHRIST (Deemed to Be University), Bangalore, 560074, India; Shivakumar S., Department of Mechanical and Automobile Engineering, CHRIST (Deemed to Be University), Bangalore, 560074, India; Raghavendra S., Department of Computer Science Engineering, CHRIST (Deemed to Be University), Bangalore, 560074, India; Ravikumar H.C., Department of Computer Science Engineering, Dayananda Sagar Academy of Technology and Management, Bangalore, 560082, India

Design and structural characteristics of conducting polymer-metal organic framework composites for energy storage devices
subject: Composite; Conducting polymer; Energy storage device; Metal-organic framework; Supercapacitor
description: The popularity of portable gadgets has increased the supply for energy storage systems with significant power and energy densities Redox-active conducting polymers (CPs) have mechanical qualities similar to polymers and electrical conductivity properties similar to metals. Unfortunately, the volume changes that occur throughout the charge and discharge procedures cause them to function poorly. An efficient method to attain high performance is to combine CPs with metal-organic frameworks (MOF) to create composites. Despite MOFs' extraordinary interior surface areas and adaptable pore structures, they have poor stability, polymers can improve MOF stability and improve other crucial characteristics like electrical conductivity. The combination of these two different components can result in a variety of desired features that are not always attained by these components individually. The recent research on conducting polymer-based metal-organic framework (CP/MOF) composites for energy storage applications is thoroughly surveyed in this review paper. This review focuses on various CP/MOF-based fuel cells, batteries and supercapacitors, pertinent fabrication techniques, and important design principles. 2023 Elsevier B.V.
creator: Jose S.; Sariga; Varghese A.
source: Synthetic Metals, Vol-297
publisher: Elsevier Ltd
date: 2023-01-01
rights: Restricted Access
relation: ISSN: 3796779; CODEN: SYMED
format: Online
language: English
type: Article
coverage: Jose S., Department of Chemistry, CHRIST (Deemed to Be University), Bengaluru, 560029, India; Sariga, Department of Chemistry, CHRIST (Deemed to Be University), Bengaluru, 560029, India; Varghese A., Department of Chemistry, CHRIST (Deemed to Be University), Bengaluru, 560029, India

Design and synthesis of bioactive Ru(II) complexes: antibacterial activity, biocompatibility and biomolecular binding
description: Ruthenium(ii) complexes with N- and S-donor ligands have emerged as promising alternatives to conventional antibiotics due to their stability, biocompatibility, and ability to interact with biological macromolecules. In this work, a series of four Ru(ii)thiazolidine complexes, [Ru(ii)(L1L4)(p-cymene)Cl]PF6, were synthesized and structurally characterized using spectroscopic techniques and X-ray crystallography. Their interactions with DNA and proteins showed partial groove binding with calf thymus DNA and a static quenching mechanism with bovine serum albumin (BSA). Biological investigations revealed that two of the complexes exhibited strong antioxidant activity and significant antibacterial effects against methicillin-resistant Staphylococcus aureus (MRSA) and Klebsiella pneumonia (KP). Moreover, hemolysis assays confirmed their favourable biocompatibility. These results highlight Ru(ii)thiazolidine frameworks as promising candidates for antimicrobial drug development. This study not only underscores their therapeutic potential but also advances the role of ruthenium-based coordination chemistry in addressing the persistent challenge of antibiotic resistance. This journal is The Royal Society of Chemistry, 2025
creator: Bhunya, Debasis; Datta, Riya; Maity, Ribhu; Saha, Alipe; Sen, Sujata; Brandao, Paula; Pattanayak, Satyajit; Maity, Tithi; Sarkar, Keka; Samanta, Bidhan Chandra
source: RSC Advances;Volume;15;Issue;50;pp.42573-42587
publisher: Royal Society of Chemistry
date: 01-01-2025
rights: All Open Access; Gold Open Access; Green Open Access
relation: ISSN: 20462069; CODEN: RSCAC
format: online
language: English
type: Article
coverage: Bhunya D., Department of Chemistry, Christ University, Hosur Road, Karnataka, Bengaluru, 560029, India; Datta R., Department of Chemistry, Christ University, Hosur Road, Karnataka, Bengaluru, 560029, India; Maity R., Department of Chemistry, Mugberia Gangadhar Mahavidyalaya, Bhupatinagar, Purba Medinipur, West Bengal, 721425, India; Saha A., Department of Microbiology, University of Kalyani, West Bengal, India; Sen S., Department of Microbiology, University of Kalyani, West Bengal, India; Brandao P., Departamento de Quica, CICECO, Universidade de Aveiro, Aveiro, 3810-193, Portugal; Pattanayak S., Department of Chemistry, Mugberia Gangadhar Mahavidyalaya, Bhupatinagar, Purba Medinipur, West Bengal, 721425, India; Maity T., Department of Chemistry, Prabhat Kumar College, Purba Medinipur, West Bengal, Contai, 721401, India; Sarkar K., Department of Microbiology, University of Kalyani, West Bengal, India; Samanta B.C., Department of Chemistry, Mugberia Gangadhar Mahavidyalaya, Bhupatinagar, Purba Medinipur, West Bengal, 721425, India

Design and validation of minimal jerk lane changing manoeuvre for adaptive cruise control in electric vehicles
subject: Adaptive cruise control; Advanced driver assistance system; Anti-lock braking system; Electronics control unit; Model predictive control
description: Vehicle stability largely depends on the driving conditions and the driver. In Autonomous vehicles the stability of the vehicle is an important factor and is directly related to safety. When performing the steering manoeuvres during overtaking or during turns, the autonomous features should ensure that the vehicle remains stable. This work focuses on design and development of a steering manoeuvre that ensures smooth operation during overtaking and turns. The model will be implemented along with Adaptive Cruise Control and Anti-Lock Braking mechanism. The validation of the model is performed in IPG CarMaker software. The software is linked with Matlab/Simulink which enables to operate the model at the backend to perform the validation of the safety and stability features. Article Highlights Proposes a minimal jerk-based lane-changing maneuver for smoother Adaptive Cruise Control in EVs. Integrates real-time optimization for dynamic driving conditions using MATLAB/Simulink and IPG CarMaker. Combines minimal jerk control, Adaptive Cruise Control, and ABS to enhance safety and skid prevention. The Author(s) 2025.
creator: Chacko, Parag Jose; Krishna, S. Mohan; Haneesh, K.M.; Daya, J. L. Febin; Stonier, Albert Alexander
source: Discover Applied Sciences;Volume;7;Issue;11;Article No.;1363;
publisher: Springer Nature
date: 01-01-2025
rights: All Open Access; Gold Open Access; Green Open Access
relation: ISSN: 30049261;
format: online
language: English
type: Article
coverage: Chacko P.J., Department of Electrical and Electronics Engineering, CHRIST (Deemed to be University), Bangalore, India; Krishna S.M., TCI-IIMB Supply Chain Sustainability Lab, Supply Chain Management Centre, Indian Institute of Management, Bangalore, India; Haneesh K.M., Department of Electrical and Electronics Engineering, CHRIST (Deemed to be University), Bangalore, India; Daya J.L.F., Electric Vehicles Incubation, Testing and Research Centre, Vellore Institute of Technology, Chennai, India; Stonier A.A., School of Electrical Engineering, Vellore Institute of Technology, Vellore, India

Design and validation of the digital well-being scale
subject: digital; online; scale development; well-being
description: As the reliance on digital products and services continues to increase, there arises the need to measure and understand how the use of digital devices affects our well-being. In order to do so, the researchers attempted to create and validate an instrument. The items for the instrument were identified through an extensive review of literature, followed by a brainstorming session. The statements were then validated by a panel of experts, post which the instrument was administered, and the data was collected and analyzed for reliability and validity. The final instrument returned a Cronbachs alpha score of 0.921, indicating high reliability. The validity of the instrument was also established through a confirmatory factor analysis. 2023, University of Bologna. All rights reserved.
creator: Gomes R.; Mathew J.; Nair S.; Mulasi A.; Yadav P.
source: Ricerche di Pedagogia e Didattica, Vol-18, No. 1, pp. 239-251.
publisher: University of Bologna
date: 2023-01-01
rights: Restricted Access
relation: ISSN: 19702221
format: Online
language: English
type: Article
coverage: Gomes R., Jyoti Nivas Autonomous College., India; Mathew J., School of Business and Management, CHRIST University, India; Nair S., School of Business and Management, CHRIST University, India; Mulasi A., Presidency University, India; Yadav P., CMR Institute of Technology, India

Design and Verification of a Novel Anchor Shaped Double Negative Metamaterial Unit Cell
subject: double negative metamaterials; left-handed materials; metamaterial antennas; negative refractive index
description: In this manuscript, a novel anchor-shaped double negative metamaterial is proposed. The structure is designed to resonate at 2.45 GHz. The unit cell is designed on a 1.6 mm thick FR4 substrate having a dielectric constant of 4.4, and simulated using Ansys HFSS. The unit cell exhibits a double negative behavior and negative refractive index behavior. The robust and popularly used Nicolson-Ross-Weir and Transmission-Reflection methods were implemented on MATLAB to extract and validate the metamaterial characteristics. This novel metamaterial unit cell covers 1 GHz to 4.8 GHz which is one of the most extensively researched and employed bands of the electromagnetic spectrum. The bandwidth performance of this new structure for double negative behavior is compared to other unit cells. It shows better performance with comparable size and outperforms the other geometries. This metamaterial is well-suited for a wide range of applications like wireless communication, biomedical applications in ISM (2.4 GHz) band and 5G communication services in the sub-6 GHz range. 2022 IEEE.
creator: Chand E.; Suganthi S.
source: 2022 IEEE Microwaves, Antennas, and Propagation Conference, MAPCON 2022, pp. 1043-1048.
publisher: Institute of Electrical and Electronics Engineers Inc.
date: 2022-01-01
rights: Restricted Access
relation: ISBN: 978-166545203-8
format: Online
language: English
type: Conference paper
coverage: Chand E., CHRIST University, Dept. of Electronics and Communication Engg, Karnataka, Bangalore, 560074, India; Suganthi S., CHRIST University, Dept. of Electronics and Communication Engg, Karnataka, Bangalore, 560074, India

Design Cognition while using digital tools: A Distributed Cognition Approach
subject: Affordances; Design Thinking; Distributed Cognition; Ideation Flow Analysis; Visual Thinking
description: The use of digital tools in the conventional architecture design thinking process which derives its basis from sketching is followed in many colleges in India. Various shortcomings due to the integration of digital tools to the manual design process have been enumerated during the past 30 years. Digital tools provide affordances different from the manual sketching design process, the effects of which can be understood by adopting a distributed cognition approach. The paper builds on design cognition research while using externalization tools in the design process. It does so by developing a theoretical framework derived from distributed cognition and an understanding of visual thinking processes from design literature. The paper utilizes the distributed cognition framework by Zhang and Norman, to arrive at resultant affordances of externalization tools in design. The same is then utilized for a protocol study which was coded for its visual thinking components and other relevant codes. The same protocol study was also coded for ideation flow analysis. The findings pointed towards compromised visual thinking and reduced ideation while utilizing digital tools in quick conceptualization. 2021 ACM.
creator: Vriddhi V.; Sen J.; Sharma A.
source: ACM International Conference Proceeding Series, pp. 30-39.
publisher: Association for Computing Machinery
date: 2021-01-01
rights: Restricted Access
relation: ISBN: 978-145038499-5
format: Online
language: English
type: Conference paper
coverage: Vriddhi V., School of Architecture, Christ University, India; Sen J., Department of Architecture and Regional Planning, Indian Institute of Technology Kharagpur, India; Sharma A., Department of Design, Indian Institute of Technology Delhi, India

Design considerations of an inductive sensor for segmented mirror telescopes
subject: Astronomy; Edge Sensor; Mutual inductance; Planar inductor; Primary mirror control system; Segmented mirror telescope
description: The Segmented mirror technology has become natural choice for any optical telescope larger than 8 meter in size, where small mirror segments are aligned and positioned with respect to each other to an accuracy of few tens of nanometer. Primary mirror control system with the help of edge sensor and soft linear actuator maintains that alignment which changes due to gravity and wind loading. For any segmented mirror telescope edge-sensor plays very critical role. It should have very high spatial resolution (few nanometer), large range, multidimensional sensing, high temporal stability as well as immunity towards relative change in temperature and humidity. Though capacitive sensors are widely used for this purpose, however, their inherent sensitivity towards humidity and dust make them unsuitable for telescopes operating at humid low altitude regions. Whereas, inductance based sensors, working on the principal of mutual inductance variation between two planar inductor coils, produce promising results in such a situation. Looking at stringent requirements, design and development of a planar inductive sensor is a challenge. As a first step toward sensor development, we have explored the design aspects of it. The inductive coils are first simulated and analyzed using electromagnetic FEA software for different coil parameters. The design considerations include optimization of coil parameters such as geometry of coils, trace densities, number of turns, etc. and operational requirements such as number of degree of freedoms to be sensed, range of travel, spatial resolution, as well as required sensitivity. The simulation results are also verified through experimentation. In this first paper we report the design and analysis results obtained from FEA simulations. 2018 SPIE.
creator: Kumar V.; Parihar P.; Nakulan A.; Manoharan A.
source: Proceedings of SPIE - The International Society for Optical Engineering, Vol-10700
publisher: SPIE
date: 2018-01-01
rights: Restricted Access
relation: ISSN: 0277786X; ISBN: 978-151061953-1; CODEN: PSISD
format: Online
language: English
type: Conference paper
coverage: Kumar V., Indian Institute of Astrophysics, Koramangala 2nd Block, Bengaluru, Karnataka, 560034, India; Parihar P., Indian Institute of Astrophysics, Koramangala 2nd Block, Bengaluru, Karnataka, 560034, India; Nakulan A., Christ University, Bhavani Nagar, Bengaluru, Karnataka, 560029, India; Manoharan A., Christ University, Bhavani Nagar, Bengaluru, Karnataka, 560029, India

Design control and management of intelligent and autonomous nanorobots with artificial intelligence for Prevention and monitoring of blood related diseases
subject: Blood clot; Gradient descent method; Hypoxemia; Nanorobots; Semi-supervised machine learning model; Swarm intelligence; Thrombus
description: The effective management of human bloodstream remains to be the prime focus for the clinicians over years and it impose greater challenges when it comes to real-time solution. In particular managing hypoxemia and detection of blood clots is most pertinent. One major challenge faced is the existence of limited training data generated from real-world scenarios. On the other hand, creating an efficient model is often time consuming and expensive. This paper focusses on effective convergence of artificial intelligence and nanorobotics technologies to design and implement autonomous intelligent nanorobots to deal with blood related diseases. The major contribution of the research is two-fold, first we define an efficient architecture of the nanorobotics system with appropriate design parameter. Next, we develop a novel semi-supervised learning model using stochastic gradient descent method and kernel space that efficiently control and manage the nanorobots and helps in earlier prognosis and treatment of blood related diseases. The proposed model is novel and efficient as it enables working at nanoscale, providing resourceful understanding on physical and chemical properties associated with human body. The use of artificial intelligence techniques further makes the system to work more intelligently and independently. COSMOL with integrated MATLAB environment is used for experimental setup and simulation. MNIST dataset is compared with online RP tree method and other conventional batch related techniques. The performance analysis is compared based on performance, error rates and risk related factors. The proposed approach provides significant improvement in terms of performance with minimal error rate and improved accuracy measures. 2023
creator: Balusamy B.; Dhanaraj R.K.; Seetharaman T.; Sharma V.; Shankar A.; Viriyasitavat W.
source: Engineering Applications of Artificial Intelligence, Vol-131
publisher: Elsevier Ltd
date: 2024-01-01
rights: Restricted Access
relation: ISSN: 9521976; CODEN: EAAIE
format: Online
language: English
type: Article
coverage: Balusamy B., Shiv Nadar Institution of Eminence, Delhi-NCR, India; Dhanaraj R.K., Symbiosis Institute of Computer Studies and Research (SICSR), Symbiosis International (Deemed University), Pune, India; Seetharaman T., Department of CSE, CMR University, Bangalore, India; Sharma V., Computer Science Department, CHRIST(Deemed to be University), Delhi-NCR, India; Shankar A., Department of Cyber Systems Engineering, WMG, University of Warwick, Coventry, CV74AL, United Kingdom, Centre of Research Impact and Outreach, Chitkara University Institute of Engineering and Technology, Chitkara University, Punjab, India, School of Computer Science Engineering, Lovely Professional University, Punjab, Phagwara, 144411, India; Viriyasitavat W., Chulalongkorn Business School, Faculty of commerce and accountancy, Chulalongkorn University, Thailand