Invited Talks
Invited talks of SPIN 2023
Speaker Dr. Vivek Lall, General Atomics Global Corporation, USA
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Speaker Dr. Muriel Medard,Massachusetts Institute of Technology Cambridge, USA
Title Universal decoding - revisiting the need for standardization in error-correcting codes
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While 5G has provided some notable successes in introducing new technologies, such as millimeter wave and adoption of massive multi-input multi-output (MIMO), many of the above desiderata have been pushed at this stage to 6G. The causes of these unrealized ambitions are varied, but much can be attributed to the fact that the architecture of 5G remains patterned after previous generations, an overlay of many quasi-sedimentary layers of successive legacies, from conventional suboptimal modulations, to interleaving over channels, to being limited to a small number of long-and low-rate physical layer codes such as LDPCs, to hybrid ARQ and ARQ repetition at the MAC and transport layers. 5G has often resorted to increasing bandwidth to mask the inefficiencies of these legacy issues by running systems in fast forward.
Speaker Dr. Peter H. J. Chong, Auckland University of Technology, NewZealand
Title A Joint Physical-Layer Network Coding Based Medium Access Control
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Vehicular network plays a crucial role in intelligent transportation system. It can provide road safety by broadcasting Basic safety message (BSM). Based on the framework of Dedicated Short-Range Communication (DSRC), this paper proposes an efficient and reliable MAC protocol for BSM packets dissemination in last-mile vehicular networks from the train station. It perfectly integrates Physical-Layer Network Coding (PNC) and Random Linear Network Coding (RLNC) in both roadside unit (RSU) and onboard unit (OBU) nodes. Comprehensive simulation shows that compared with the existing schemes for BSM dissemination, the proposed protocol achieves both high flexibility and excellent performance in packet delivery ratio (PDR).
Speaker Dr Ahmed Abdelgawad, Central Michigan University, USA
Title All What You Need to Know About Internet of Things (IoT)
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Internet of Things (IoT) is the network of physical objects or “things” embedded with electronics, software, sensors, and network connectivity. It enables the objects to collect, share, and analyze data. The IoT has become an integral part of our daily lives through applications such as public safety, intelligent tracking in transportation, industrial wireless automation, personal health monitoring, and health care for the aged community. IoT is one of the latest technologies that will change our lifestyle in the coming years. This talk aims to introduce the design and implementation of IoT signal processing systems. The foundations of IoT will be discussed throughout real applications. Challenges and constraints for future research in IoT will be discussed. In addition, research opportunities and collaboration will be offered for the attendees.
Speaker Dr. Harry E. Ruda, University of Toronto, Canada
Title Prospects for nanowire optoelectronics
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Semiconductor nanowire research has touched many aspects of optoelectronics owing to inherent advantages that these structures can provide for future device applications. In this presentation, we focus on the unique aspects of the structures to provide for subwavelength emitters and absorbers, as well as sensors suitable for IoT. We draw from our contributions and those of others to highlight the ability to fabricate nanoscale light emitters, ultrafast high responsivity photodetectors for future information processing applications, as well as leveraging their deployment in systems, in particular optical cavities, for state-of-the-art sensing platforms.
Speaker Dr Ian White, University of Bath, UK
Title Advances and Trends in Optical Data Communications
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This presentation will provide an overview of local area optical communications systems highlighting the advances that have enabled local area optical link datas rate to increase from 0.1 Gb/s in 1990 to nearly a Tb/s around 2020 . After providing a historical context, there will be a discussion of the range of technologies which have been used including those for fibreoptic hardware, modulation formats, signal processing and packet switching. The presentation will then describe the challenges to increasing link data rates further, recognising the need to reduce the transmitted power per bit and cost. Potential technical solutions and newly proposed methods are outlined.
Speaker Dr Jon Jenkins, NASA Ames Research Center, USA
Title Ziggy, a Portable, Scalable Infrastructure for Science Data Processing Pipelines and its Application to a Proxy, Legacy Global Hyperspectral Data Set for NASA’s Earth System Observatory’s Upcoming Surface, Biology and Geology Mission
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The Surface Biology and Geology (SBG) mission recently passed mission confirmation review and has entered phase A – design and development. SBG will acquire high resolution solar-reflected spectroscopy and thermal infrared observations at a data rate of ~2.5 TB/day and generate products at ~40 TB/day. Given that the per-day volume is greater than NASA’s total extant airborne hyperspectral data collection, collecting, processing, disseminating, and exploiting the SBG data present new challenges. To meet these challenges, we have developed a prototype science data processing pipeline using a legacy hyperspectral data set to help prepare for SBG’s flight. Our science pipeline infrastructure, Ziggy, is based on the technology developed for NASA’s Kepler and TESS planet-hunting missions. We integrated Ziggy with Earth Observer-1/Hyperion workflows to build a prototype SBG pipeline and ingested the 17-year Hyperion archive that provides globally sampled visible through shortwave infrared spectra that are representative of SBG data types and volumes. We fully implemented the first stage and processed the entire 55 TB Hyperion data set from the raw data (Level 0) to top-of-the-atmosphere radiance (Level 1R). We are currently evaluating the ISOFIT atmospheric correction module to convert the L1R data to surface reflectance spectra (Level 2) before reprocessing the full data set to L2. Cross Checks are being performed with RadCalNet as well as with coincident observations by AVIRIS. This effort demonstrates that Ziggy can significantly reduce the cost, risk and time required to develop complex science data processing pipelines for extremely large data sets.
Speaker Dr. Kinga Schumacher,German Research Center for Artificial Intelligence, Germany
Title Zooming in and zooming out of AI - The methods behind automation and control
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This talk will provide an overview on AI based on the methods-capabilities-matrix. The matrix helps to answer questions such as „What methods do I need to consider if I want to achieve a particular capability?“ or „what can I achieve with these methods?“.
We will zoom into areas relevant to the automation and control of AI systems, highlighting both a range of methods and current research activities and results. Finally, a third dimension will be introduced: the criticality of AI applications.
Speaker Dr Darius Burschka, Technical University of Munich, Germany
Title Challenges in Coupling of Multimodal Sensor Data to Robot Control
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The current development in the information processing in robotics applications towards learning methods creates new challenges on the processing in the robot. A robust processing requires multimodal complementary input sources that need to be fused together for a robust control signal. I will present methods that allow to integrate slow sensor signals (cameras) directly into the control loops of highly dynamic robotic systems and discuss the necessary parametrizations for this step. I will also present, what needs to be added to the current learning based methods to be useful for robot control and show our current approaches how to extend the DL frameworks to provide the necessary information.
Speaker Dr Justin Dauwels,Technische Universiteit Delft, Netherlands
Title Identifying psychiatric manifestations in schizophrenia and depression from audio-visual behavioral indicators through a machine-learning approach
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Schizophrenia (SCZ) and depression (MDD) are two chronic mental disorders that seriously affect the quality of life of millions of people worldwide. We aim to develop machine-learning methods with objective linguistic, speech, facial, and motor behavioral cues to reliably predict the severity of psychopathology or cognitive function, and distinguish diagnosis groups. We collected and analyzed the speech, facial expressions, and body movement recordings of 228 participants (103 SCZ, 50 MDD, and 75 healthy controls) from two separate studies. We created an ensemble machine-learning pipeline and achieved a balanced accuracy of 75.3% for classifying the total score of negative symptoms, 75.6% for the composite score of cognitive deficits, and 73.6% for the total score of general psychiatric symptoms in the mixed sample containing all three diagnostic groups. The proposed system is also able to differentiate between MDD and SCZ with a balanced accuracy of 84.7% and differentiate patients with SCZ or MDD from healthy controls with a balanced accuracy of 82.3%. These results suggest that machine-learning models leveraging audio-visual characteristics can help diagnose, assess, and monitor patients with schizophrenia and depression.
Speaker Dr. Alex Casson, The University of Manchester, England, U.K
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Speaker Dr. Sarath Kodagoda,UTS Robotics Institute Hornsby, Australia
Title Can we keep humans away from sewers?
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Safe, efficient and cost effective condition assessment of all shapes of wastewater assets is significant for the wastewater managers. The value of sewerage infrastructure assets in the United States and Australia is estimated to be more than $1 trillion and $100 billion respectively. Wastewater assets are deteriorating at a cost estimated to be $13.75 billion per year in the United States, $50 billion per year in Germany, and $100 million per year in Australia, which are further expected to rise. Failure to maintain such infrastructures will result in a variety of negative economic, social and environmental consequences for utilities and the governments. With increasing urbanization, industrialization, effects of climate change and expectation of higher quality of life and reputation, there is an unprecedented demand for making the old wastewater systems more efficient, durable and resilient. This requires frequent, safe, cost effective and efficient condition assessments without exposing humans in sewers.
Speaker Dr Zeljko Zilic, McGill University, Canada
Title Blockchain for Internet of Things: Opportunities and Challenges
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In this talk, we review the issues in using blockchain for Internet of Things (IoT) and their applications. After reviewing the topics in trust and security, we outline our proposals for providing secure access between IoT devices and the blockchain, as well as the mechanisms for providing scalable, 2-level provisioned blockchain installations.
Speaker Dr. Carlos M. Travieso-Gonzále, University of Las Palmas de Gran Canaria ,Spain
Title Analysing the affective computing by image processing
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The physiological signals also known biosignals, most common and used for biomedical and biometric identification, are the electrocardiogram (ECG) and electroencephalogram (EEG). ECG measures the electrical activity of the heart and EEG measures the electrical activity of the brain. There is other very rarely used signals that we consider studying as part of this work. For example, the electromyogram (EMG) which is a record of the electrical activity produced by the muscles and nerves and the galvanic skin response (GSR)or skin conductance, which is an indication of psychological or physiological arousal such as fear, anger or other feelings. The detection of the degree of emotion through physiological signals is a very poorly studied area that can offer a new and efficient system, which deals with using the combination of several physiological signals as a method of identifying the degree of emotion in affective computing. The objective of this proposal is to analyze the physiological signals that show people's emotions, quantify it and perform an automatic detection, which can become an innovative and robust tool that shows the degree of emotion
Speaker Dr Stuart Parkin,Max Planck Institute for Microstructure Physics, Germany
Title Chiral spintronics for massive digital data memory-storage
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Spintronics is a field of research that harnesses the electron’s spin to create novel materials with exotic properties and devices especially those for storing digital data that is the lifeblood of many of the most valuable companies today. Spintronics has already had two major technological successes with the invention and application of spin-valve magnetic field sensors that allowed for more than a thousand-fold increase in the storage capacity of magnetic disk drives that store ~70% of all digital data today. Just recently, after almost a 25-year exploration and development period, a high performance nonvolatile Magnetic Random Access Memory, that uses magnetic tunnel junction memory elements, became commercially available. A novel spintronics memory-storage technology, Magnetic Racetrack Memory is on track to become the third major success of spintronics. Racetrack Memory is a novel, non-volatile memory in which data is encoded in mobile chiral domain walls that are moved at high speeds by current induced spin-orbit torques to and thro along synthetic antiferromagnetic racetracks. Chiral domain walls are just one member of an ever-expanding family of nano-scopic chiral spin textures that are of great interest from both a fundamental as well as a technological perspective. A zoology of complex spin textures have been discovered including, anti-skyrmions, elliptical Bloch skyrmions, two-dimensional Néel skyrmions, and fractional anti-skyrmions. Finally, I will discuss some of our recent work in superconducting spintronics that could lead to a very low energy-consuming cryogenic racetrack memory that is needed for advanced quantum computing systems.
Speaker Dr. Grigore S. Stamatescu,University, Politehnica of Bucharest, Romania
Title Data Pre-processing and Automated Machine learning for Energy AI: An Overview
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Applications of artificial intelligence methods in the energy sector are driving a new wave of scientific and engineering developments aimed at improving the efficiency, resilience and security of the energy system. This is supported through open-science resources including, but not limited to, high-quality public data-sets, code artefacts and open-source libraries and tools, as well as collaborative communities for public-private projects. The talk will first introduce available repositories for data-driven research in Energy AI such as IEEE Dataport and PecanStreet and the technologies enabling such as development environments (JupyterLab, VS Code) and dedicated Python libraries such as tsfresh, matrixprofile, scikit-learn, auto-sklearn. An end-to-end workflow will be introduced for robust benchmarking of forecasting and anomaly detection of energy time series in sub-problems such as building automation and microgrid energy variability assessment at micro-temporal scales. Such representative implementation examples will enable researchers and engineers to productively approach this domain and foster collaboration with wide-reaching potential impact on environmental protection, social and economic development.
Speaker Dr Pavel Loskot,ZJU-UIUC Institute Rm, China
Title Algebras for Advanced Signal Processing and Data Mining: New Analytical Tools Beyond Calculus
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Linear algebra, multivariate calculus, applied probability and statistics, and convex optimizations are well-established mathematical tools that have been used extensively in designing variety of engineering systems. These tools are very effective in processing numerical values as well as manipulating basic mathematical objects including variables, vectors and functions. However, as the systems are getting much more sophisticated and embed intelligent decision makings, their design demands much more advanced approaches and going beyond traditional calculus. There is a great need to work with more advanced mathematical structures and abstractions. This talk will outline modern algebraic concepts for abstract modeling and manipulating complex mathematical structures including data topology, algebras and category theory.
Speaker Dr Mehmet Emir Koksal, Ondokuz Mayis Üniversitesi,Samsun, Turkey
Title Design of fractional-order proportional-integral-derivative controllers by using three-dimensional plots
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In this talk, mathematical formulations of five design specifications in accordance with the three-dimensional drawing with programming implementations by MATLAB are presented. For designing controllers by using the introduced three-dimensional graphical method, system design specifications such as phase margin, gain margin, phase flatness, low-frequency output disturbance rejection and high-frequency noise rejection are considered, and their important characteristics are shown. The requirements are mapped in the three-dimensional Euclid space by three-dimensional surfaces or lines so that the proportional, integral, derivative control coefficients can be chosen to meet the given specifications in an optimum way and to allow trade-off or compromise.
Speaker Dr. Jacob Scharcanski, Federal University of Rio Grande do Sul,Brazil
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Speaker Dr Lotte N. S. Andreasen Struijk, Aalborg University, Denmark
Title Tongue interfacing for robots and assistive technologies
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Tongue interfaces have been developed to allow severely paralyzed individuals to control assistive technologies and robots. This talk presents applications of an inductive tongue computer interface for robot and computer control and addresses the usability with regard to e.g., speech and robustness, which has been the topic of some speculations in the field of research on assistive technologies.
Speaker Dr. Hien Quoc Ngo, Queen's University Belfast, U.K
Title The Road to 6G: From MIMO to Cell-Free Massive MIMO
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Cell-free massive multiple-input multiple-output (MIMO) is a system where many (hundreds or thousands) access points or base stations coherently serve many (tens or hundreds) users. Different from the current cellular (mobile) networks where the coverage area is divided into cells, in cell-free massive MIMO, there are no cells or cell boundaries. Cell-free massive MIMO is expected to overcome the boundary effect--the inherent limitation of the current cellular networks which persists over the last 50 years. It is expected to ensure everything and everywhere get connected, and hence, fulfils the key requirements of next generation wireless communication systems (beyond 5G and towards 6G).
Speaker Dr. Sunil Vadera, University of Salford, Manchester, U.K
Title A Model for Information and Sensor Validation
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Sensor validation is critical for many applications. Without it, machine learning and decision-making models suffer from the garbage in/garbage out problem. In this presentation, I will present a Bayesian model for information and sensor validation model that was developed with colleagues at Mexican Instituto de Electricas. The model represents relationships between variables using Bayesian networks and utilizes probabilistic propagation to estimate the expected values of variables. If the estimated value of a variable differs from the actual value, an apparent fault is detected. The fault is only apparent since it may be that the estimated value is itself based on faulty data. The theory extends our understanding of when it is possible to isolate real faults from potential faults and supports the development of an algorithm that is capable of isolating real faults without deferring the problem to the use of expert provided domain-specific rules. To enable practical adoption for real-time processes, an any time version of the algorithm is developed, that, unlike most other algorithms, is capable of returning improving assessments of the validity of the sensors as it accumulates more evidence with time. The developed model is tested by applying it to the validation of temperature sensors during the start-up phase of a gas turbine when conditions are not stable; a problem that is known to be challenging
Speaker Dr. John Healy, University college Dublin, Ireland
Title Suppression of Gibbs Ringing in MR Images
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Gibbs ringing arises when discontinuous signals are reconstructed from Fourier domain data. Such a situation occurs in magnetic resonance (MR) imaging, which measures discrete Fourier domain data. Ringing artifacts can confuse diagnosis based on such an MR image. There are a variety of algorithms for processing MR images to remove ringing artifacts, but these are poorly evidenced. We discuss the quantitative evaluation of such algorithms and present results.
Speaker Dr. Halina Kwasnicka, Wroclaw University of Science and Technology, Poland
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Speaker Dr. Jürgen Gall, University of Bonn, Germany
Title Efficient CNNs and Transformers for Video Understanding and Image Synthesis
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In this talk, I will first discuss approaches that reduce the GFLOPs during inference for 3D convolutional neural networks (CNN) and vision transformers. While state-of-the-art 3D CNNs and vision transformers achieve very good results on action recognition datasets, they are computationally very expensive and require many GFLOPs. While the GFLOPs of a 3D CNN or vision transformer can be decreased by reducing the temporal feature resolution or the number of tokens, there is no setting that is optimal for all input clips. I will therefore discuss two differentiable sampling approaches that can be plugged into any existing 3D CNN or vision transformer architecture. The sampling approaches adapt the computational resources to the input video such that as much resources as needed but not more than necessary are used to classify a video. The approaches substantially reduce the computational cost (GFLOPs) of state-of-the-art networks while preserving the accuracy. In the second part, I will discuss an approach that generates annotated training samples of very rare classes. It is based on a generative adversarial network (GAN) that jointly synthesizes images and the corresponding segmentation mask for each image. The generated data can then be used for one-shot video object segmentation
Speaker Dr Andreas Savakis,Rochester Institute of Technology, USA
Title Multi-scale Representations for Human Pose Estimation
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Human pose estimation is a topic of interest for research and applications, such as human-computer interaction, activity recognition and health monitoring. Pose estimation methods have advanced significantly due to deep learning architectures based on convolutional neural networks and more recently on vision transformers. We discuss an efficient Waterfall Atrous Spatial Pooling (WASP) architecture for multi-scale feature extraction that is useful for both pose estimation and semantic segmentation. Our waterfall architecture leverages the efficiency of progressive filtering in cascade, while maintaining multiscale fields-of-view comparable to spatial pyramid configurations. The waterfall module is used with various backbones in an encoder-decoder framework producing state-of-the-art results for single person and multi-person 2D pose estimation. We extend our framework to 3D pose from a single image and 2D hand pose estimation. We conclude by outlining new directions and applications for future work.
Speaker Dr Lyudmila Mihaylova, The University of Sheffield, UK
Title How Could we Increase Autonomy with Machine Learning Methods?
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There is a fast development of different machine learning methods – for object classification, tracking, action recognition and other tasks with multiple types of data – from images and videos to time series data. Autonomous image and video analytics face a number of challenges due to the huge volumes of data that sensors provide, the changeable environmental conditions and other factors. However, it is important to know when the methods work well and when they are not reliable, e.g. how much could we trust the obtained results? How could we characterize trust is a related question. How could we quantify the impact of uncertainties on the developed solutions? This talk will discuss current trends in the area of machine learning and show results for image and video analytics for autonomous systems.
Speaker Dr Annalisa Bruno, Nanyang Technical University, Singapore
Title Co-Evaporated Metal Halide Perovskites: from Small Areas Solar Cells to Mini module
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Metal-halide perovskites made a breakthrough in photovoltaic and light-emitting technologies in the last ten years. MHPs are one of the most promising low-cost materials, due to their excellent optoelectronic properties and fabrication versatility. Since the adventofthefirstperovskite solar cells (PSCs) in 2009, their power conversion efficiency (PCE) has now reached 25.6% [1], for active areas smaller than 1 cm2 and their operational stability is constantly improving [2-4]. The interest in transferring the existing technology into large-area perovskite modules using industrial-compatible techniques is exploding. In this talk, I will show why thermal evaporation is a promising perovskite fabrication technique to bring this technology closer to reliable and extended production, by relying on excellent size scalability, promising stability, fine composition control, and surface adaptability [5]. The co-evaporated perovskite thin ?lms are uniform over large areas with low surface roughness and a long carrier lifetime. I will present our highly ef?cient, large area, PSCs where the MAPbI3 perovskite is deposited by thermal co-evaporation. Developing optimization strategies customized for n.i.p [6, 7] and p.i.n [8] architectures the PSCs achieved PCEs above 20% in both configurations. Moreover, the co-evaporated MAPbI3is formed intrinsically strain-free and the PSCs showed remarkable structural robustness and impressive thermal maintaining over ≈80% of their initial PCE after 3600 under continuous thermal aging at 85 °C without encapsulation[9].
Speaker Dr Álvaro Rocha, University of Lisbon, Portugal
Title Telemedicine in Maturity Models
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Telemedicine allows health care professionals to evaluate, diagnose and treat patients at a distance using telecommunications technology. The approach has been through a striking evolution in the last years and it is becoming an increasingly important part of the healthcare infrastructure. So, telemedicine is usually present in Maturity Models for management of Hospital Information Systems, as a characteristic of maturity stages and/or maturity influencing factors. This talk starts with an introduction to growth stages theory and maturity models, specifically those related with information systems management. Then, an analysis and a discussion are done to show where telemedicine is positioned in Maturity Models for management of Hospital Information Systems and, at the end, some conclusions are drawn.
Speaker Dr. Genovese Angelo, University of Milan, Italy
Title Deep Learning for Hematopathology
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Computer Aided Diagnosis (CAD) systems are increasingly utilizing image analysis and Deep Learning (DL) techniques, due to their high accuracy in several medical imaging fields, including the detection of Acute Lymphoblastic (or Lymphocytic) Leukemia (ALL) from peripheral blood samples. CAD systems based on DL can support the pathologists in performing their decision by analyzing the blood samples images to determine the presence of lymphoblasts. However, when using DL, the limited dimensionality of ALL databases may highlight bias in the data and cause overfitting, favoring the use of transfer learning techniques to reduce the bias and increase the accuracy in the detection, in particular by considering Convolutional Neural Networks (CNN) pretrained on larger databases. This talk will present recent possible solutions for high accuracy ALL detection based on CNNs, addressing some of the problems of medical data, such as bias and limited dimensionality.
Speaker Dr. Gaurangi Gupta, NASA Jet Propulsion Laboratory (JPL), California Institute of Technology, USA
Title Innovative Antennas for Satellite Telecom, Radar Systems and Radio Telescope
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The talk discusses the innovative antennas being developed for various telecom, radar and radio telescope applications. A 350 m diameter reflector antenna is being developed as a detector for the Lunar Crater Radio Telescope. Once deployed, it will be one of the largest filled aperture telescopes. The RF design and development thus involve complexities in terms of structural constraints and environmental interactions, which will be discussed in the talk. All metal circularly polarized patch excited cup antenna arrays being developed for direct to Earth communication from the potential Europa Lander and for Lunar missions. These antennas project the capability to survive high power levels, cryogenic temperature and high radiation on the Europa and Lunar surface. The optimum placement of these antennas will also be discussed to maximize the coverage hours and data volume per day. All metal meta surface antennas have been designed for Ku band radar and are currently being used for ice sounding measurements. These antennas form an integral part of the development for future space missions
Speaker Dr. Muhammad Ali Babar Abbasi, Queens University Belfast, UK
Title BEYOND 5G BEAMFORMERS: From Terrestrial to Satellite Wireless Networks
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Looking to stay ahead of the curve in the fast-paced world of Beyond 5G wireless networks? Then join us for an informative and engaging 30-minute talk, where the Centre for Wireless Innovation (CWI), Queen’s University Belfast, U.K., researcher, Dr. Abbasi will explore the critical role of antenna beamformers in ensuring seamless internet connectivity for wireless devices. Discover the latest trends and applications of co-located beamforming antennas and gain insights into the future of Smart Radio Environments in our increasingly connected world. This free webinar promises to provide valuable knowledge and is not to be missed.
Speaker Dr. Nasimuddin, Institute for Infocomm Research, A-STAR, Singapore
Title Compact circularly polarized antenna designs for RF energy harvesting system
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Global demand for energy has grown rapidly in recent years. To meet the long-term demand of global energy, different techniques of wireless energy harvesting were introduced. Harvesting RF energy is an alternative solution, especially with the advances and popularity of wireless communication devices. These communication devices are constantly transmitting RF energy, so RF energy harvesting paves a way to utilize the abundant scattered electromagnetic (EM) waves in our surroundings environment. The available EM waves (RF energy) can be in any polarizations, such as elliptical, linear, or circular. By using an appropriate receiving antenna, EM waves can be converted into electrical energy for low-powered devices, and thus, there is much focus put toward RF energy-harvesting (RFEH) systems, especially in the antenna designs. A CP antenna enables the system to harvest RF energy regardless of the device orientation as well as making the insensitive to polarization loss. The RF waves/energy that is found in the surrounding area can exist in any orientation and phase alignment, so CP antennas are more desirable for energy harvesting systems.
Speaker Dr. Syed Akbar Raza Naqvi, The University of Queensland, Australia
Title Dielectric Properties of Healthy Human Skin and Challenges towards Dermal Anomaly Detection using Electromagnetic Techniques
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The subject talk aims to present the complex nature of the human body's largest organ (skin) in terms of its dielectric properties. Skin is the primary barrier to the external environment and protects vital organs from harmful organisms. Any malignancy damaging this first line of defense would require an urgent clinical response. Therefore, as a pre-requisite towards building an electromagnetic skin cancer detection system, it is necessary to understand the dielectric nature of healthy skin and its variation across multiple body regions. The talk will discuss the statistical relationship between the dielectric properties of measured dermal regions and various bio-features, such as skin pigmentation, body weight and gender, observed across 50 healthy volunteers. The observations are aimed at assisting the development of an electromagnetic skin cancer detection system by identifying the causes of dielectric variations across different dermal measurement conditions. The interactive session will also address the measurement challenges and proper characterization procedures of this heterogeneous biological tissue in the clinical environment.
Speaker Dr. Adam Narbudowicz, The University of Dublin, Ireland
Title Securing IoT: Antennas as Padlocks, Propagation as a Key
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Physical layer (PHY-layer) security is a topic of paramount significance, as it attempts to restrict the physical areas towards which the communication is transmitted. While numerous cryptographic schemes have been implemented to secure communication in higher layers of telecommunication stack, the PHY-layer offers the unique possibility to link the cryptographic scheme to the physical location of transmitter/receiver.
Dynamic Directional Modulation (DM) is a key-less technique to increase privacy of the wireless communication using features of antenna and propagation. Its traditional implementations require bulky antenna arrays, which are impractical for compact Internet of Things (IoT) devices. The talk presents recent advances in beamforming-capable electrically small antennas, their use for on-body DM. To support the low-power aspect of IoT, it demonstrates dynamic DM scheme with single RF chain and simplified computational power. Lastly, it discusses the double-edged use of MIMO systems, which can be deployed by attacker for their advantage.
Speaker Dr. Heinrich Edgar Arnold Laue, Namibia Water Corporation Ltd Namibia
Title How to properly apply novel ideas to a conventional research domain—a journey from signal processing to compressive antenna arrays
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High-impact scientific publications have been shown to be highly conventional, while also drawing inspiration from a few highly unexpected sources. Balancing novelty and conventionality is a tricky business. In this talk, we look at the case of compressive antenna arrays, and how a signal-processing concept went from being naively copied to antenna arrays, to inspiring a new type of antenna array that offers improved performance in conventional antenna-array terms.
Speaker Dr. Nandana Rajatheva, University of Oulu, Finland
Title PHY Layer Enhancements and Resource Allocation in mmWave and sub-THz
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Based on the channel properties in mmWave and sub-THz, various physical layer enhancements are considered. Novel modulation and coding methods, sensing based on LiDAR to predict blockages and incorporation of RADAR sensing into communication system are among those. LiDAR / RADAR are considered as infrastructure based as opposed to vehicle mounted providing the base station – network with accurate position details enabling location based beamforming and facilitating beam management. Reconfigurable intelligent surfaces (RIS) can add to the more deterministic nature of the channel with suitable placement and how these are used effectively is an interesting avenue for research. In terms of resource allocation, instead of complex optimization implementations, we can consider machine learning based solutions in cell free massive MIMO systems. The challenge is to reduce complexity and facilitate a stable rate through suitable power control methods.