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invited

Prof. Gaurav Sharma

IEEE Fellow

Department of Electrical and Computer Engineering

University of Rochester

Large Scale Visual Data Analytics for Geospatial Applications

Abstract: The widespread availability of high resolution aerial imagery covering wide geographical areas is spurring a revolution in large scale visual data analytics. Specifically, modern aerial wide area motion imagery (WAMI) platforms capture large high resolutio n at rates of 1-3 frames per second. The sequences of images, which individually span several square miles of ground area, represent rich spatio-termporal datasets that are key enablers for new applications. The effectiveness of such analytics can be enhanced by combining WAMI with alternative sources of rich geo-spatial information such as road maps or prior georegistered images. We present results from our recent research in this area covering three topics. First, we describe a novel method for pixel accurate, real-time registration of vector roadmaps to WAMI imagery based on moving vehicles in the scene. Next, we present a framework for tracking WAMI vehicles across multiple frames by using the registered roadmap and a new probabilistic framework that allows us to better estimate associations across multiple frames in a computationally tractable algorithm. Finally, in the third part, we highlight, how we can combine structure from motion and our proposed registration approach to obtain 3D georegistration for use in application such as change detection. We present results on multiple WAMI datasets, including nighttime infrared WAMI imagery, highlighting the effectiveness of the proposed methods through both visual and numerical comparisons. The talk particularly highlights how image processing and computer vision applications are a fertile ground for incorporating machine learning and data science methodologies

Biography: Gaurav Sharma is a professor at the Electrical and Computer Engineering Department at the University of Rochester, where, from 2008-2010, he also served as the Director for the Center for Emerging and Innovative Science (CEIS), a New York state funded center located at the University of Rochester chartered with promoting economic development through university-industry technology transfer. He received the PhD degree in Electrical and Computer engineering from North Carolina State University, Raleigh in 1996. From 1993 through 2003, he was with the Xerox Innovation group in Webster, NY, most recently in the position of Principal Scientist and Project Leader. His research interests include data analytics, cyber physical systems, signal and image processing, computer vision, and media security; areas in which he has 51 patents and has authored over a 190 journal and conference publications. He is the editor of the Digital Color Imaging Handbook published by CRC press in 2003. He is a member of the IEEE Publications, Products, and Services Board (PSPB) and chairs the IEEE Conference Publications Committee. From 2011 through 2015, he served as the Editor-in-Chief for the Journal of Electronic Imaging and has served as an associate editor for the Journal of Electronic Imaging, the IEEE Transactions on Image Processing, and for the IEEE Transactions on Information Forensics and Security. Dr. Sharma is a fellow of the IEEE, a fellow of SPIE, a fellow of the Society for Imaging Science and Technology (IS&T) and has been elected to Sigma Xi, Phi Kappa Phi, and Pi Mu Epsilon. In recognition of his research contributions, he received an IEEE Region I technical innovation award in 2008.


Nanowires and 2D Materials in Practice – Visibility, Doping and Device Investigation

Abstract: Starting from the first exfoliated graphene flakes in 2004, 2D materials have conquered a broad field of possible future applications. Among these, 2D material based circuits and sensors are very promising candidates for a contemporary industrial adoption. Nevertheless, there are many challenges to master before the goal of a profitable economic adjustment can be achieved. Therefore, the talk focuses on the possibility of a 2D material and nanowire assimilation that allows an analysis by the help of buried chip structures.

Prof. Klaus Kallis

Faculty of Electrical Engineering and Information

Technical University Dortmund

Germany

Biography: Biography Professor Klaus Kallis obtained his PhD in Electrical Engineering, summa cum laude, from Technical Univerity Dortmund, Germany in 2009. His PhD research focussed on MOS technology in the sub-100 nm-region. Presently,he is Head of technology, TU Dortmund University and represents Micro-and Nanotechnologies Group of Faculty of Electrical Engineering and Information Technology,TU, Dortmund University. Many of his research work has been accepted by industry. His research interests are in the area of 2D materials, nanophotonics and plasmonics.


Prof. Nan-Kuang Chen

Department of Electro-Optical Engineering

National United University

Miaoli,Taiwan 360

Cellular Dimensional Picoliter Microsensing in Fiber Optics

Abstract: In photonic applications, miniaturized fiber sensors at the length of 100 um scale have been found to helpful for ultra -tiny sample volume microsensing. Conventionally, the popular fiber-optic sensors are based on fiber Bragg gratings, long period gratings, Sagnac loop interferometers, Fabry-Perot interferometers,Michelson interferometers, and Mach-Zehnder interferometers. However, those interferometric sensors are usually with a device length of longer than a few centimeters, which is disadvantageous to achieve the high accuracy measurements for ultra-weak signals or tiny sample volume. In this talk, the fiber abrupt tapering technique is the fabrication method which breaks the adiabatic waveguiding in fiber core and transforms fractional power of the core mode into cladding modes will be introduced to achieve the miniaturized and integrated fiber components. By introducing two adjacent abrupt tapers in a highly Er/Yb codoped silica fiber using a focused CO2 laser beam to make micro Mach - Zehnder interferometer (MZI), the minimum device length achieved can be as short as 180 um. Fractio nal power of the core mode is coupled to excite the cladding modes through the first abrupt taper and the residual core mode and the excited cladding modes thus propagate through the different optical paths. The cladding modes and the core mode meet up at the second abrupt taper to produce interferences. The cladding modes can sense the ambient index variations of the external material coating at the phase shifter or at the abrupt tapers. This micro MZI can be used to detect the micro index variation of 0.002 under a 6.3 picoliter of liquid volume. In addition, the monolithic miniaturized Michelson interferometers based on core-cladding modes interferences for picoliter sample volume microsensing will also be introduced.

Biography: Nan-Kuang Chen received the Ph. D. degree from National Chiao Tung University, Taiwan, in 2006. From February 2014, he is a Professor with the Departmentof Electro-Optical Engineering,National United University, Taiwan. He has authored and co-authored more than 200 international SCI journal and conference articles. Heserved as reviewers for 41 prestigious SCI internationaljournals and also served on the International Advisory Committee/Technical Program Committee/Organizing Committeeand Session Chair/Reviewers for more than 80 times for many international conferences,delivered 22 invited talks in international conferences and organized two international conferences (IAPTC 2011 and IEEE/ICAIT 2013).He holds 14 ROC patents, 12 US patents, 1 Korea patent, and 4 PRC patents.His research interests also include micro optical forces(Van der Wall’sforceand evanescent attractive force) and its micro sensing applications, dispersion engineering technique,Cr3+-doped fiber amplifier, optical internet of things, large core high power fiber lasers, mode-locked femtosecond fiber lasers, andfiber-optic physics .


Prof. Supriyo Bandyopadhyay

Fellow of IEEE, APS, IoP, ECS and AAAS

Department of Electrical and Computer Engineering,

Virginia Commonwealth University, Richmond, VA 23284, USA

Image processing with Dipole-Coupled Multiferroic Nanomagnet Arrays

Abstract: Hardware-based image processing, without the involvement of any software, offers orders of magnitude improvement in speed and energy cost. In such paradigms, the image processing activity is elicited from interactions between passive devices, each encoding a pixel state, that are arranged in such a way as to perform specific image processing tasks. A 2-D periodic array of dipole-coupled elliptical magnetostrictive nanomagnets, delineated on a piezoelectric substrate, can execute a variety of image processing functions, such as image de-noising, image re-construction, pattern recognition and edge enhancement detection. Each nanomagnet has two stable magnetization states that encode pixel color (black or white). An image containing black and white pixels is first converted to corresponding voltage states (high and low) and then mapped into the magnetization states of the nanomagnets with magneto-tunneling junctions (MTJs). The same MTJs are employed to read out the processed pixel colors later. Dipole interaction between the nanomagnets ensures that when the system is perturbed/excited and then allowed to relax to the ground state, the final magnetization states of the nanomagnets (or, equivalently, the pixel colors) conform to the desired processed image. This is "physics-based processing" where the physics of the inter-nanomagnet interaction, rather than any software or instruction sets, accomplishes the processing function. In our case, the image processing activity is triggered by applying a global strain to the nanomagnets with a voltage dropped across the piezoelectric substrate. The strain perturbs the magnetization of the magnetostrictive nanomagnets taking them to an excited state. When the strain is removed, the magnetizations relax to the collective ground state and in the process assume configurations that correspond to processed pixels. An image containing an arbitrary number of black and white pixels can be processed in few nanoseconds with very low energy cost.

Biography: Prof. Supriyo Bandyopadhyay is Commonwealth Professor of Electrical and Computer Engineering at Virginia Commonwealth University, Richmond, Virginia, USA. He received a B. Tech degree in Electronics and Electrical Communications Engineering from the Indian Institute of Technology, Kharagpur, India; an M.S degree in Electrical Engineering from Southern Illinois University, Carbondale, Illinois; and a Ph.D. degree in Electrical Engineering from Purdue University, West Lafayette, Indiana. He spent one year as a Visiting Assistant Professor at Purdue University, West Lafayette, Indiana (1986-87) and then nine years as a faculty of University of Notre Dame. In 1996, he joined University of Nebraska-Lincoln as Professor of Electrical Engineering, and then in 2001, moved to Virginia Commonwealth University as a Professor of Electrical and Computer Engineering, with a courtesy appointment as Professor of Physics. His research interests include spintronics, straintronics, nanoelectronics, spin based quantum computing and classical logic circuits, spin transport in nanostructures, spin-based devices and general topics in spintronics. He directs the Quantum Device Laboratory in the Department of Electrical and Computer Engineering. Prof. Bandyopadhyay has authored and co-authored nearly 400 research publications and presented nearly 150 invited or keynote talks at conferences and colloquia/seminars across four continents. He is a Fellow of IEEE, APS, IoP, ECS and AAAS. Prof. Bandyopadhyay received the College of Engineering Research Award (1998), the College of Engineering Service Award (2000) and the Interdisciplinary Research Award (2001) given jointly by the College of Engineering, College of Science, and Institute of Agricultural and Natural Resources at University of Nebraska-Lincoln. At Virginia Commonwealth University, he was honored with the Distinguished Scholarship Award given annually to one faculty member in the University (2012). It is the highest award given by the University for scholarship. His department gave him the Lifetime Achievement Award for sustained contributions in research, education and service in 2015. In 2016, he was named Virginia's Outstanding Scientist by Governor Terence R. McAuliffe (one of two from across the State and encompassing all areas of physical science, life science, social science, technology, mathematics and medicine). That same year, his alma mater the Indian Institute of Technology, Kharagpur, gave him the Distinguished Alumnus Award. In 2017, Prof. Bandyopadhyay received the University Award of Excellence from Virginia Commonwealth University, which is the highest honor bestowed by the University on a faculty member.


High Power RF Systems: Operational Experience and Challenges

Abstract: Radio Frequency (RF) system is an integral part of the particle accelerator, required for energizing the elementary particles like electron and proton. Particle accelerators are widely used in many frontier areas of basic and applied research in physics, chemistry, and biology using synchrotron radiation, and many technical and industrial fields like radiotherapy, ion implantation, industrial processing and sterilization of medical products. The source of energy in most of these accelerators is RF power which produces electrical field in the accelerating resonators called RF cavity. Particles to be accelerated are made to propagate through these cavities and RF amplifier system creates a desired electromagnetic field inside this cavity which in turn accelerates the particles to desired energy level. Synchrotron radiation sources, one family of such accelerators have unique set of applications due to special properties of synchrotron radiation emitted therein.

Depending on the type of particle and energy of the accelerator, RF systems in the frequency range from few MHz to tens of GHz are employed. Commonly used high power RF devices include tetrodes and klystrons. However, being strategic devices, their availability becomes uncertain due to prevailing export control conditions. Apart from RF amplifiers other major sub-systems are, low level RF signal processing sub-system, rigid coaxial power transmitting sub-system and high voltage sub-system. RRCAT is one of the premier research institute of Department of Atomic Energy (DAE) where, Klystron, Inductive output tube and solid state technologies based RF systems are operating in round the clock mode for more than last 10 years. Indus Accelerator complex at RRCAT consists of two synchrotron radiation sources viz. Indus-1 (450 MeV) and Indus-2 (2.5 GeV). The booster synchrotron serves as common injector for these storage rings. Three major RF systems namely booster RF system, Indus-1 Storage ring RF System and Indus-2 are have been developed and commissioned for Indus-1 and Indus-2. This lecture will explore design details, operational experience and major challenges for these high power RF systems at RRCAT. It will also throw some light on academic and industry linked activities of department of atomic energy, wherein there is good change of interaction between young professionals, academicians and industry people with DAE.

Mr. Mahendra Lad

Head, RF Systems Division, Raja Ramanna Centre for Advanced Technology,

, Dept. of Atomic Energy, Indore, India

Biography: 

Shri Mahendra Lad completed his B. E. in (Electronics and Telecommunication) from Devi Ahilya University, Indore in 1986. He joined Raja Ramanna Centre for Advanced Technology (RRCAT), a premier R&D institute of Department of Atomic Energy (DAE), in 1987 as Scientific Officer after graduating from 30th batch of Bhabha Atomic Research Centre (BARC) Training School. Since joining he had been involved in the development of different RF Systems, to mention RF systems for different particle accelerators like Indus Synchrotron, Infra-Red Free Electron Laser, proposed Indian Spallation Neutron Source at RRCAT Indore. He has steered R&D programmes in several front line areas like low level RF control and signal processing, high power vacuum tube based power amplifiers, and solid-state RF amplifiers at RRCAT. Presently he is heading RF Systems Division at Raja Ramanna Centre for Advanced Technology, Indore and under his leadership indigenous technology developments of very high power Solid state RF amplifiers, Digital Low Level RF System, modular DC power supplies for RF amplifiers, Normal conducting RF cavity and high power circulator are being pursued. He has authored and coauthored several journal and conference papers. He is also Sub project coordinator of DAE mega science project titled ‘Physics and Advanced Technologies for High Proton Accelerators’ in collaboration with Fermilab USA. He is General Secretary of Indian Society for Particle Accelerator. He is also involved in the indigenous development of microwave material as part of Board of Research in Nuclear Sciences (BRNS) project. He has chaired many technical committees in DAE. He is also member of DAE Accelerator Laser Safety committee.


Dr. Akhilesh Jain,

Head, Solid-State RF Amplifier Section,

Raja Ramanna Centre for Advanced Technology,

Dept. of Atomic Energy, Indore, India.

High Power Solid-State Radio Frequency Transmitters.

Abstract: : At Radio frequency (RF) and Microwave, research studies on Solid-state technology based Transmitter (SST) have gained a growing importance. These are required for many commercial and strategic applications. The particle accelerator is one such application where development of SST is increasingly being promoted around the world. Recently many particle accelerator laboratories like Soleil, LNLS, ESRF, and RRCAT have harnessed the power of the solid-state RF technology. Its numerous advantages, compared to its vacuum tube counterpart, and ubiquitous use of superconducting cavities in particle accelerators are the main driving forces behind its rapid research. Today, the laterally diffused metal-oxide-semiconductor (LDMOS) device technology has spectacularly improved power and efficiency performance of the RF power amplifier (PA) at UHF and wireless frequencies; with power handling capacity reaching up to hundreds of Watts. However, the final power requirement in a typical particle accelerator and communication system like radar is always much more than this power capability of individual PA. Hence, this much power is obtained by adopting the most popular N-way divide and combine SST architecture.

Solid state power amplifiers are now encouraged to replace very high power tube based infrastructure. Along with getting clean power (free from phase noise and spurious), solid state device failure rate reported from different global laboratories using solid state RF amplifiers, is very low including infant mortality. However, being strategic devices, their availability becomes uncertain due to prevailing export control conditions. RRCAT is one of the premier research institute of department of Atomic Energy where, solid state technologies based 225 kW RF system is operating in round the clock mode for more than last 5 years. Such high power was attempted here first time in the world. This lecture will focus on the innovative technology of harmonic tuned PA operating modes, radial power combiner; aperture coupled rectangular directional coupler and transmitter architecture and their application for designing such high power solid state of the art amplifiers.

Biography: Akhilesh Jain received M. Tech. in Electrical Engineering from Indian Institute of Technology Kanpur in 1993 and PhD in Engineering Science from Homi Bhabha National Institute in 2014. He joined one of the premier R&D institute of department of Atomic Energy (DAE) i.e. Raja Ramanna Centre for Advanced Technology (RRCAT), Indore in 1994. Since then, he is engaged in the research and development of high power solid-state radio frequency and microwave amplifier and related components. His main areas of interest are harmonic tuned solid-state power amplifiers, radial power combiners, dielectric resonator loaded structures and system level analysis for high power amplifiers. His design and development of first time attempted 75 kW transmitters was highly appreciated. He is involved in many other designs of solid state amplifiers to cater requirement of particle accelerators. He has authored and coauthored several journal and conference papers. He is regular reviewer of IEEE-MTT and other journals’ papers. He is actively involved in the design and development of 40 kW solid-state amplifiers for supplying them in large quantity to Fermi Lab at Chicago, as per MOU with US Dept. of Energy, under DAE mega science project titled ‘Physics and Advanced Technologies for High Proton Accelerators’. He has also received one US patent for indigenous development of microwave substrate. Presently he is Head of Solid State RF Amplifiers Section at RRCAT.