Students' Reading Group
Department of Electrical Engineering, IIT Bombay
  • Turning the tables: Journey from a Ph.D student to an IIT faculty member
  • Tue
    29
    May

    Time

    16:00
    • Presenter:
      Dr. Debapratim Ghosh, Assistant Professor, IIT Bhubaneswar
    • Venue: GG Conference Room
    • Abstract:
      One of the ways which you can use to prepare for a bright future is to learn from the experience for others successful people. We believe that many students of our department wants to become a successful faculty in one of the reputed institutes. However, the path which enables a research scholar to be faculty is less known to many of us. New faculty application process, the interview, significance of your research work, experience of TA/RA work are among the many factors which impact your prospects of becoming a faculty. Experience of someone among us who has recently explored this path and is a faculty in one of IITs will be very helpful to you.
    • Session Coordinator: Newton
    • Session Chair: NA
  • Modeling and Simulation Methodologies of Charge Density in Heterostructures with focus on Gallium Nitride
  • Tue
    29
    May

    Time

    15:00
    • Presenter:
      Dr. Joydeep Ghosh, Post Doctoral Fellow
    • Venue: GG 102
    • Abstract:
      GaN based high electron mobility transistors (HEMT) have shown great promise for the future high-power and high-frequency applications due to their wide band gap and high electron mobility. An analytical modeling framework for the two-dimensional gas (2DEG) density and the bare surface barrier height in AlGaN/GaN heterostructures is explained. The charge neutrality electrostatics across the AlGaN barrier layer and the presence of a low-density donor-like surface states as the source of the 2DEG are considered. This modeling approach is augmented to investigate the charge density in AlGaN/InGaN/GaN double heterostructures, which use InGaN layer as the conducting channel. Analytical models are compared with the Schroedinger–Poisson simulations of AlGaN/InGaN/GaN heterostructures which implement the AlGaN surface donor states. The formation of a two-dimensional hole gas (2DHG) at the InGaN/GaN hetero-interface is taken into account, when InGaN channel layer thickness increases. Finally, as a 2DEG also exists at MgZnO/ZnO interfaces, the corresponding modeling methodologies are elaborated.
    • Session Coordinator: Anil Gupta
    • Session Chair: NA
  • Prediction analysis using count data
  • Tue
    10
    Apr

    Time

    15:30
    • Presenter:
      Sathish Vurukonda, Ph.D. student, Control & Computing
    • Venue: GG 102
    • Abstract:
      Time series data in form of counts is frequently measured in various fields like finance, insurance, public health etc. However, literature on forecasting for count type time series is still very sparse as compared to forecasting methods for time series for Gaussian responses. In this talk we will discuss prediction of diseases using a new forecasting method based on the concept of the predictive likelihood function. We first look at appropriate models for the data and then construct forecasting regions based on quantiles. Performance of the proposed forecasting method is validated using simulations and a real data set.
    • Session Coordinator: Soumya Dutta
    • Session Chair: Shana Moothedath
  • Need for High Speed Motors in Electric Assisted Turbocharging
  • Thu
    5
    Apr

    Time

    16:00
    • Presenter:
      Ram Kumar, Research Scholar, Power Electronics Lab
    • Venue: GG 101
    • Abstract:
      The Government of India has plans to make a major shift to electric vehicles by 2025. However, rapid commercialization of pure electric vehicles is hindered by lack of power system infrastructure and energy storage. In contrast, IC engines and hybrid vehicles will continue dominating the automotive sector if their efficiency is increased. Turbocharging has enabled more powerful and yet smaller IC engine to be fitted to the vehicles. Nevertheless, the turbocharged engine has an inherent problem called turbo lag. Incorporating an electric assist will reduce the turbo lag. The motor used for the electric assist should be designed for excellent thermal, mechanical and magnetic properties. In this talk an overview will be given on the working of electric assist and the design constraints on the motor.
    • Session Coordinator: Rupali Vinayak
    • Session Chair: Silba Mathew
  • Application of nonnegative matrices
  • Wed
    28
    Mar

    Time

    15:30
    • Presenter:
      Keyur Mistry, M.Tech student, EE2
    • Venue: EEG302
    • Abstract:
      Application of matrices can be found in diverse areas of research like probability and statistics, optimization, economics, sociology, and so on. Based on certain properties, matrices are classified into various categories. One of the important classes is the class of nonnegative matrices - a matrix whose all entries are nonnegative. In this talk, we will discuss some examples coming from applications where nonnegative matrices are encountered. To solve these examples, we will discuss few important results from the Perron-Frobenius theory on nonnegative matrices.
    • Session Coordinator: Aditya Chaudhari
    • Session Chair: Mousumi Mukherjee
  • Is Bitcoin really the future of currency ?
  • Wed
    21
    Mar

    Time

    16:00
    • Presenter:
      Rajarshi Maitra, Executive Engineer L&T
    • Venue: GG103
    • Abstract:
      Bitcoin started as a first-ever Byzantine Fault Proof digital cash system with the publication of its white paper and the subsequent mining of the Genesis Block. In this talk, a brief history of the development of digital currency systems will be presented. The presentation will also cover a brief history of Cypher-punk movement that started in early 90’s to layout the ideological premises on which Bitcoin was created. Bitcoin as an idea for providing a particular solution to Byzantine Generals Problem has deep and far-reaching consequences on our global economic space as well as redefining the structure of legacy governance systems as we move into the 22nd century. “The biggest misconception people have about Bitcoin is, they think it’s about money” - Andreas M. Antonopolous (2017)
    • Session Coordinator: Sadaf ul Zuhra
    • Session Chair: NA
    • Presentation Slides
  • Mode transition Control of Inverters
  • Fri
    16
    Mar

    Time

    16:00
    • Presenter:
      Onkar Kulkarni, Research Scholar, PE Lab
    • Venue: GG 001
    • Abstract:
      A novel automatic mode transition control strategy for multiple inverters to operate in grid-connected and standalone modes. The synthesis of dual structure control algorithms of various inverters is achieved using novel state machines. Unlike existing control methods, the proposed method neither requires communication-based supervisory control of inverters nor it requires dedicated storage facility for achieving smooth mode transition. 
    • Session Coordinator: Kamal Vaghasiya
    • Session Chair: TBA
  • Millimeter Wave Antennas and Multibeam Antenna Technology for 5G
  • Thu
    15
    Mar

    Time

    15:30
    • Presenter:
      Pratigya Mathur, Research Scholar, Antenna Lab
    • Venue: GG 101
    • Abstract:
      With the demanding system requirements of 5G and severe spectrum shortage at conventional cellular frequency, multibeam antenna system at mm wave frequency is attracting a lot of research interest. We will have an overview of this technology and discuss antennas at mm waves
    • Session Coordinator: Vijay Anavangot
    • Session Chair: Dr Hemant Kumar
  • Seeking an appropriate spark
  • Thu
    22
    Feb

    Time

    16:00
    • Presenter:
      Akshay Khadse (Control and Computing) and Makarand M Kane (PEPS)
    • Venue: GG 302
    • Abstract:
      Wire Electric Discharge Machining (WEDM), also known as spark-machining, is being investigated as an alternative for silicon-wafer-cutting from ingots. Spark machining is a non-contact process and hence has certain advantages over traditional abrasive methods. This process leads to lesser material-losses and better surface finish. In this talk we will discuss characterization of sparks between metals and semiconductors and how it is distinct from metal-metal sparks. The duration and electrical conditions at the spark-gap need to be critically controlled for proper machining. This demands fabrication of indigenous WEDM customized for silicon. Pulsed-power-supply (PPS) plays a vital role to achieve the same. To this end, mathematical modeling and design of PPS will be discussed along with controller design.
    • Session Coordinator: Aditya Chaudhari
    • Session Chair: Soumya Dutta
  • Resistive Memory Devices and their Neuromorphic Applications
  • Fri
    16
    Feb

    Time

    15:30
    • Presenter:
      Neeraj Panwar, Centre of Excellence in Nanoelectronics
    • Venue: GG 102
    • Abstract:
      Because of the scaling and speed limit of DRAM and flash there is a need of new memory technology to fulfill the today’s requirement of increasing computing power and storage capacity. There are many memory technologies by which researchers are trying to find the solution like - FRAM, MRAM, STT-RAM, PCRAM etc. But among them RRAM (Resistive Random Access Memory) technology is looking as the most promising candidate for next generation non-volatile memory because of its high endurance, long retention, fast read and write speed, its CMOS compatibility, simple two terminal device structure in comparison to conventional three terminal transistor based memories, power efficiency and its cost effectiveness. Though the RRAM have shown very good performance and other qualities which are attractive but there are two main issues with RRAM technology becoming hurdle for its commercialization- variability and its unclear mechanism. In the present seminar these two issues have been focused.
    • Session Coordinator: Chandan M L
    • Session Chair: Amzadh Hussain
  • Power Quality Improvement Using UPQC
  • Wed
    7
    Feb

    Time

    15:30
    • Presenter:
      Shamim Hasan, Advanced Power Electronics Lab
    • Venue: GG 103
    • Abstract:
      Due to increased use of non-linear loads in recent years, the electric power quality at distribution level has deteriorated. The poor quality of power supply may prove detrimental for delicate loads or may result in undesired operation of loads. The Unified Power Quality Conditioner (UPQC) is one of the most comprehensive solutions to the power quality related problems. It mitigates current/voltage harmonics, voltage sag/swell, reactive power flow and unbalance in load voltage. The UPQC finds application in places having critical and delicate loads such as in Intensive Care Unit (ICU) of hospitals and in broadcasting centres.
    • Session Coordinator: Rupali Vinayak
    • Session Chair: Sriram R
  • Modelling Quantum Tunneling in planar and cylindrical NanoDevices
  • Tue
    6
    Feb

    Time

    15:30
    • Presenter:
      Dr Ashutosh Mahajan, Post-doctoral Fellow
    • Venue: GG 103
    • Abstract:
      Quantum Tunneling plays a significant role in design of nanoelectronic devices. In this talk, the speaker will present a physical model for all possible charge leakage mechanisms that include direct, Fowler-Nordheim tunneling and inelastic tunneling through single as well as multiple traps. He will discuss computation of these tunneling currents and its relevance in Flash Memory devices and Gate-All-Around (GAA) cylindrical nanowire MOSFETs. The speaker will present his recent work on a model that accurately calculates gate leakage current from the quasi-bound-states(QBS) in the cylindrical inversion region of nanowire(NW). The lifetime of QBS is calculated considering the scattering of cylindrical wavefront by solving open system Schrodinger equation using finite element method. The impact of channel and oxide material, channel diameter, effective mass of channel material and oxide thickness on gate leakage current density is investigated. We studied Si, Ge, InAs and GaN nanowires various composite high-k stack. Our calculations show that GaN GAA-NWFET have lowest gate leakage among the materials investigated.
    • Session Coordinator: Akshaya Goyal
    • Session Chair: Akash Mukherjee
  • Deconvoluting the Graph Convolutional Networks
  • Wed
    31
    Jan

    Time

    15:30
    • Presenter:
      Nagma Khan, Vision and Image Processing Lab
    • Venue: GG 103
    • Abstract:
      Do you recall how AlexNet revolutionized the Deep Learning World with its groundbreaking Convolutional Neural Network architecture? Another revolution is coming in the form of Graph Convolutional Networks! Graphs are everywhere around us - social networks, image segments, chemical compounds, etc. There are numerous applications where graph-based data has be to classified/segmented/clustered. Can we formulate it as a deep learning problem? What are the bottlenecks/challenges? How does one perform convolution on a graph? Lets ride the tide of graphs and witness this revolution.
    • Session Coordinator: Omkar Gune
    • Session Chair: Sayan
    • Presentation Slides
  • Public Protection and Disaster Relief (PPDR) Networks
  • Thu
    25
    Jan

    Time

    15:00
    • Presenter:
      Nishant Shah, Senior Project Manager - NCETIS
    • Venue: EEG 001
    • Abstract:
      Public Protection and Disaster Relief (PPDR) communication networks are all around us. These networks are integral in increasing 'Situational Awareness' and thus helping agencies involved in PPDR work, respond efficiently. How are PPDR networks different from Public communication networks? What are some of the characteristics of these networks? What kind of PPDR networks are deployed in India? How are these evolving? We will sift through all these questions and more in this talk. Over and out!
    • Session Coordinator: Vijay Anavangot
    • Session Chair: NA
  • EMI-immune Analog Integrated Circuit Design
  • Wed
    17
    Jan

    Time

    14:30
    • Presenter:
      Prof. Maryam Shojaei Bhaghini
    • Venue: GG 101
    • Abstract:
      Analog integrated circuits are extensively used in many applications where signals have to be processed in analog domain before or after they are processed in digital domain. While analog circuits are carefully designed at the system level they will lose the performance due to external interferences. One such source of disturbance is EMI (electromagnetic interference) which corrupts the circuit performance. Though there are techniques to block the EMI there are not 100% full solutions available due to the many emerging applications such as point of care health care. In addition to propagation of the EMI signal into the circuit non-linear nature of the analog circuits shifts the DC operating points and hence drives the circuits out of their operating region. This effect is called EMI-induced offset. In this talk the examples of EMI-induced offset are presented followed by proposed solutions from our group and other groups.
    • Session Coordinator: Mohamed Jabir
    • Session Chair: