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23rd IEEE International Conference on Trust, Security and Privacy in Computing and Communications, TrustCom 2024

作者： Parbat, Tanusree Chatterjee, Ayantika Indian Institute of Technology Advanced Technology Development Centre Kharagpur India

In public and shared platforms where security is paramount, encrypted database storage and processing have become a key research priority. However, traditionally encrypted databases do not support direct computation of relational queries, and hence, those types of query processing are infeasible without intermediate decryption. To achieve end-to-end encrypted computation, such databases prefer fully homomorphic encryption (FHE), which demands circuit-based representation of any algorithm. In our work, along with other encrypted SQL operations, we analyze SQL join and show straightforward implementation, which incurs huge performance overhead. Not only in performance, number of ciphertext expansions is also huge in this case, which can trigger a sharp rise in performance overhead in encrypted domain. To address these challenges, we propose a lightweight solution only for joining the encrypted databases using pair-wise traditional column encryption with the introduction of primary and foreign keys. Then, we highlight how to perform homomorphic operations over that encrypted joining result. Our implementation shows 89.34% improvement compared to straightforward FHE-joining. Consequently, we demonstrate memory overhead reduction ∼13%. © 2024 IEEE.

关键词： Query languages

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Exploring the merits of geographical diversification of solar PV power plants for a resilient PV-dominated electricity grid in India

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Clean Energy 2023年第4期7卷 885-910页

作者： Saikat Ghosh Jatindra Nath Roy Chandan Chakraborty Advanced Technology Development Centre Indian Institute of Technology Kharagpur721302India Department of Electrical Engineering Indian Institute of Technology Kharagpur721302India

India is highly dependent on solar photovoltaics(PV)to harness its vast solar resource potential and combat climate ***,∼90%of the installed PV capacity in India is concentrated in the top nine states,with the remaining states lagging *** research reveals that during monsoons,heavy cloud cover and rain lead to high solar resource variability,intermittency and the risk of very low PV generation,which can result in reliability issues in future PV-dominated electricity *** energy storage can help in overcoming high intermittency,there are multiple challenges associated with *** novelty of this study lies in demonstrating the benefits of combining multiple PV sites in various regions to mitigate the risks of low PV generation and high *** variability of individual sites was found to be up to∼3.5 times higher than the variability of combined *** noon,prominent solar park sites like Bhadla and NP Kunta experience a decrease in power generation to values as low as∼10%of the rated PV ***,the minimum generation of the large-scale dispersed PV generation is>30%.Furthermore,the research identifies other benefits of dispersing PV generation across the country,viz.,reduction of seasonal variability by adding PV capacity in the southern region,widening of the PV generation span,more room for PV capacity addition,reduction in storage and ramping needs,utilization of hydroelectric potential of the north-east and PV potential of Ladakh,and creating opportunities for sustainable development in rural agrarian regions through agrivoltaics.

关键词： decarbonization PV-based resilient grid PV variability and intermittency solar PV power plants

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Study on Model Reference Adaptive Control Scheme to Accommodate Flight Disturbances in Micro Aerial Robots 5

Study on Model Reference Adaptive Control Scheme to Accommod...

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5th IEEE India Council International Subsections Conference, INDISCON 2024

作者： Anand Ronald, K. Iit Kharagpur Advanced Technology Development Centre Kharagpur721302 India

ISBN: (纸本)9798350376753

This paper intends to develop a mathematical model of an adaptive control strategy for micro air vehicles in consideration with associated general flight disturbances, while the common practice is to design controllers for ideal conditions. By adjusting the real-time parameters of the plant, Model Reference Adaptive Scheme (MRAS) tries to maintain the desired performance of the aircraft. The mechanism of adjustment, also called as the adaptive law, gives an optimal outcome, even when the perturbations in the plant are new and unpredictable. The results have been simulated for unstable flight and the augmented flight behavior has been presented. Also, a discussion has been made on the reference model (Proportional Integral Derivative controller - PID) used and the improvement achieved on the implementation of the MRAS to the same. As the work presented here is based on a standard prototype aircraft, there is a possibility of experimental study of fully adaptively controlled quadrotor systems by the authors in the future. © 2024 IEEE.

关键词： Micro air vehicle (MAV)

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The Eyes Have It: Exploring the Connection Between Domain-Knowledge and Perception 24

The Eyes Have It: Exploring the Connection Between Domain-Kn...

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16th Annual ACM Symposium on Eye Tracking Research and Applications, ETRA 2024

作者： Aatrai, Sonali Prabhala, Sandhya Gayatri Sharma, Saurabh Guha, Rajlakshmi Advanced Technology and Development Centre Indian Institute of Technology Kharagpur India Rekhi Centre Indian Institute of Technology Kharagpur India

ISBN: (纸本)9798400706073

Leveraging prior domain-knowledge significantly impacts perception, and this study explores whether the prior domain-knowledge has any relation with the eye movements. We explore oculometrics of 95 graduate students from Architecture, Social Science, and Biology backgrounds, categorized by their domain-knowledge levels. Students were given unbiased (neutral), domain-biased (architecture and biology) tasks. Oculometrics of the students were captured during the tasks and were analyzed to determine if prior domain-knowledge affected eye movements. Results showed no significant difference between the three groups in the unbiased tasks. However, significant differences emerged in biased tasks between groups with and without domain-knowledge. Signature markers, such as peak saccadic velocity and mean pupil diameter, along with time-correlated parameters of total scanning duration, total fixation duration, total saccadic duration, and fixation count, were found to differentiate novices from those with prior domain-knowledge. The study highlights the importance of oculometrics to distinguish between novices and those with prior domain-knowledge. © 2024 Owner/Author.

关键词： Eye movements

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Static and Dynamic Calibration of 9-Axis IMU Using UKF with Low Cost Setup 21

Static and Dynamic Calibration of 9-Axis IMU Using UKF with ...

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21st IEEE India Council International Conference, INDICON 2024

作者： Krishna, R.C. Ajay Mukherjee, Banibrata Bhalla, Saurabh Saumi, S. Advanced Technology Development Centre Indian Institute of Technology West Bengal Kharagpur India Gujarat India

ISBN: (纸本)9798350391282

MEMS based IMU sensors are very popular for its small size, low-cost and low power consumption. However, for accurate and precise data collection, proper calibration of IMU is compulsory. In this paper we have proposed a technique for both static and dynamic calibration of IMU sensor. We have developed a simple low-cost setup and used least square (LS) fit and ellipsoidal fit algorithm for static calibration and further incorporated Unscented Kalman filter (UKF) for dynamic calibration. The accelerometer is calibrated using 108 position data for three axis and gyroscope is calibrated using specially designed low-cost setup with LS algorithm whereas for magnetometer calibration, ellipsoidal fitting algorithm is used. Accordingly, all the calibration parameters like bias factor, scale factor and misalignment for accelerometer;bias factor, scale factor and non-orthogonality for gyroscope;Offset, gain and cross-gain for magnetometer are obtained. Moreover, for dynamic models like real-time or sensor fusion applications, the UKF (Unscented Kalman filter) based algorithm is proposed to obtain the calibration parameters dynamically. © 2024 IEEE.

关键词： Velocity measurement

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An Optical Feynman Gate Using Cascaded Ti:LiNbO3 Directional Couplers

An Optical Feynman Gate Using Cascaded Ti:LiNbO3 Directional...

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International Conference on Photonics, PHOTONICS 2023

作者： Sattibabu, Romala Dey, Pradip K. Bhaktha, B. N. Shivakiran Ganguly, Pranabendu Advanced Technology Development Centre Kharagpur India Department of Physics Indian Institute of Technology Kharagpur721302 India

ISBN: (纸本)9789819761630

Currently reversible logic has gained lot of interest and it is a reliable solution for optical computing, low-power CMOS, quantum computing and nanotechnology. Being reversible logic, one-to-one mapping between input and output causes minimal loss of information. In fact, optical Feynman gate (FG), one among many reversible logic gates, is a potential candidate for the realization of low power photonic computational circuits. In this paper, we propose and demonstrate an optical FG using four titanium indiffused lithium niobate (Ti:LiNbO3) directional couplers. Design of the integrated-optic chip was performed using Effective-Index based Matrix Method (EIMM). The proof-of-concept of the proposed optical Feynman gate was experimentally verified using Z-cut LiNbO3 substrate. The fabricated device has an insertion loss of ~12.5 dB at TM polarization. The switching voltage of each directional couplers in the chip were around 1.5 V without any buffer layer. The foot-print of the device is 23.8 mm × 0.63 mm. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Directional couplers

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Automated Method for Calibration Findings of Auto Slide Scanner Using Automated Digital Microscopy 3

Automated Method for Calibration Findings of Auto Slide Scan...

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3rd International Conference on Artificial Intelligence and Signal Processing, AISP 2023

作者： Sharath Kumar, P.N. Deepak, M. Devanand, P. Deepak, R.U. Health Technology Group Centre for Development of Advanced Computing Thiruvananthapuram India

ISBN: (纸本)9798350320749

Applications in the automated microscopy require careful calibration of the microscope system. In one such scenario where automated microscope is made to work with auto slide scanner, accurate measurement of the calibration parameters becomes an essential procedure. Here, we propose an automated method for finding the calibration parameters of a microscope based auto slide scanner. Microscopic images of a grid micrometer slide are analyzed for finding calibration parameters. Apart from the automated microscope and auto slide scanner, the procedure requires a digital camera and a grid micrometer slide. This calibration finding embraces the following parameters of camera and slide scanner: (a) measuring the pixel size in micrometers, (b) measuring the camera orientation and (c) measuring the linearity and uniformity of the slide scanner. The proposed method is accurate, reproducible and scalable enough to be suitable for applications requiring in-situ calibration. © 2023 IEEE.

关键词： Calibration

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Design and Experimental Analysis of Triboelectric Energy Harvester with In-house Set-up

Design and Experimental Analysis of Triboelectric Energy Har...

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2023 IEEE Applied Sensing Conference, APSCON 2023

作者： Khan, Souvik Mukherjee, Banibrata Advanced Technology Development Centre Iit Kharagpur West Bengal India

ISBN: (纸本)9781665461634

Triboelectric effect has gained huge popularity in the field of energy harvesting as well as sensing in various potential applications. In this paper, we have designed and analyzed a vertical contact separation based triboelectric energy harvesting structure and further validated it through experimentation. It has been observed that an open circuit voltage of 40 V is obtained through simulation and analysis for a specific AI-FEP (Aluminium-Fluorinated Ethylene Propylene) based tribo structure. For experimental validation, a low cost loudspeaker-based in-house test set-up has been developed, and the same tribo structure is designed, assembled and characterized. Experimentally an open circuit voltage of 41.2 V is observed for the tribo structure, which agrees well with the simulation results. Few other material combinations for triboharvester are explored as well and validated experimentally. This structure can be used for vibration sensing as well, including human motion. © 2023 IEEE.

关键词： Energy harvesting

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Non-Local Bayesian based Denoising of Magnetic Resonance Images 14

Non-Local Bayesian based Denoising of Magnetic Resonance Ima...

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14th International Conference on Computing Communication and Networking Technologies, ICCCNT 2023

作者： Gandha, Anagha M. Pillai, Thara S. Sibi, S. Devanand, P. Divya, N.S. Deepak, M. Subodh, P.S. Centre for Development of Advanced Computing Health Technology Group Thiruvananthapuram India

ISBN: (纸本)9798350335095

Magnetic Resonance Imaging is a non-invasive and efficient technique to visualize the various parts of the body. One of the major problems facing MRI as with any other medical imaging techniques is the noise and artifacts that affects it. This in turn can affect the accuracy of the diagnosis. Denoising is therefore an important part of medical image analysis. Denoising is a post-processing imaging technique aimed to achieve better diagnostic interpretation of medical images. Non-local Means is an efficient image denoising technique that exploits the self-similarity in images. Non-local Bayesian denoising combines non-local means denoising with Bayesian inference. This paper expands upon this approach for Magnetic Resonance Images. The performance of the method is measured quantitatively by means of Peak Signal-to-Noise Ratio(PSNR). In this patch-based approach, the number of patches taken is varied and the PSNR is calculated for different standard deviation of Gaussian noise. Other parameters like search radius and patch size are also varied to evaluate their effect on the performance. An empirically obtained patch count and search radius has been shown to provide optimum denoising results for Magnetic Resonance Images. © 2023 IEEE.

关键词： Medical imaging

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Indigenous Design and development of Interface Board for TMS320F28335 DSP and Programming via MATLAB Simulink Embedded Coder 1

Indigenous Design and Development of Interface Board for TMS...

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1st IEEE International Conference on Smart and Sustainable developments in Electrical Engineering, SSDEE 2025

作者： Sarkar, Urbesh Mishra, Prasun Advanced Technology Development Centre Indian Institute of Technology Kharagpur Smart Power Electronics & Electrical Drives Lab Kharagpur India

ISBN: (纸本)9798331542108

This paper presents an indigenous design and development of an interface board, interfacing different micro-controller peripherals and sensors, for the Texas Instruments TMS320F28335 Digital Signal Processor (DSP), with a focus on its integration with MATLAB Simulink Embedded Coder to do efficient programming and code deployment. The developed interface board, having essential hardware, provides a reliable and seamless connection between the TMS320F28335 DSP and the development environment, enabling real-time control, signal and data processing tasks for various embedded control systems. MATLAB Simulink Embedded Coder is employed to generate C code for the TMS320F28335 through automatic code generation and direct deployment of algorithms to the DSP streamlining the development process for embedded applications. This paper discusses the hardware components of the interface board along with communication protocols and configuration of various C2000 microcontroller blocks for software integration with MATLAB, highlighting its versatility and ease of use for real-time embedded system development. A case study of real-time implementation of closed-loop v/f control of induction motor is presented and the obtained results demonstrate the efficacy of the interface board while enabling its efficient programming and operation. This work contributes a viable, customizable solution for the students, researchers, and engineers started working with TMS320F28335 DSPs and Embedded Coder, promoting enhanced productivity and flexibility in embedded system development. © 2025 IEEE.

关键词： MATLAB

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