Events

Oct 22 - Oct 29, 2023

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  Spatio-temporal Bayesian analysis of excess mortality in 5 European countries in 2020

  Prof. Virgilio Gómez-Rubio, Department of Mathematics, Universidad de Castilla-La Mancha, Spain

  Oct 26, 12:00 - 13:00

  B9 L2 H2

  Abstract The COVID-19 pandemic produced excess mortality in many countries in 2020. In my talk, I will illustrate our use of Bayesian models and R software for the analysis of total deaths and population data, combined with environmental data, to the study of excess mortality in 2020. The study analyzes total deaths by age groups and sex in 5 European countries, and provides estimates of excess mortality at different levels of aggregation (province, autonomous community and country). For both data analysis and visualization of the results we have used the statistical software R. In addition
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  Transient Numerical Schemes in Electromagnetics: From Electromagnetic Scattering to Multiphysics Simulation

  Ming Dong, Ph.D. Student, Electrical and Computer Engineering

  Oct 25, 13:00 - 15:00

  B3 L5 R5220

  Simulation tools capable of transient electromagnetic analysis are essential for designing and optimizing electromagnetic, photonic, and optoelectronic devices. In recent years, time-domain differential equation based solvers have found widespread use due to their advantages over integral equation counterparts in analyzing transient electromagnetic field/wave interactions and multiphysics problems. This dissertation develops a group of time-domain differential equation solvers for analyzing transient electromagnetic scattering from penetrable objects and multiphysics phenomena in optoelectronic devices. In addition to providing detailed formulations of these solvers, this dissertation presents numerical examples which demonstrate their accuracy, efficiency, and applicability to real-life problems.
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  A Variational Theory of Aero-hydrodynamics

  Haithem Taha, Associate Professor

  Oct 24, 16:00 - 17:00

  B5 L5 R5209

  Euler equations aerodynamics Variational Navier-Stokes

  The Euler equation does not possess a unique solution for the flow over a two-dimensional object. This problem has serious repercussions in aerodynamics; it implies that the inviscid aero-hydrodynamic lift force over a two-dimensional object cannot be determined from first principles; a closure condition must be provided. The Kutta condition has been ubiquitously considered for such closure in the literature, even in cases where it is not applicable (e.g. unsteady).
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  Molecular Generation via Deep Generative Models

  Changsheng Ma, Ph.D. Student, Computer Science

  Oct 24, 14:30 - 16:30

  KAUST

  The field of molecular chemistry has witnessed a remarkable transformation with the integration of deep generative models. Exploring the intricate interplay between machine learning techniques and molecular generation, paving the way for novel advancements in drug discovery, materials science, and beyond.
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  Efficient Computation Through Tuned Approximation

  David Keyes, Senior Associate to the President, King Abdullah University of Science and Technology

  Oct 23, 11:30 - 12:30

  B9 L2 R2322 H1

  computation approximation software

  Numerical software is being reinvented to provide opportunities to tune dynamically the accuracy of computation to the requirements of the application, resulting in savings of memory, time, and energy. Floating point computation in science and engineering has a history of “oversolving” relative to expectations for many models. So often are real datatypes defaulted to double precision that GPUs did not gain wide acceptance until they provided in hardware operations not required in their original domain of graphics. However, computational science is now reverting to employ lower precision arithmetic where possible. Many matrix operations considered at a blockwise level allow for lower precision and many blocks can be approximated with low rank near equivalents.

Oct 15 - Oct 29, 2023

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  Improvement of InGaN-based light-emitting diodes: hydrogen passivation - based device fabrication, LED structure optimization, and III-Nitride growth using different substrates

  Pavel Kirilenko, Ph.D. Student, Electrical and Computer Engineering

  Oct 22, 16:00 - 18:00

  B3 L5 R5220

  III-Nitride materials have continuously attracted the attention of semiconductor researchers for the last decades. III-Nitrides are considered a key material for a wide range of applications, such as power electronics and color displays, and have proven to be suitable as an efficient light source. This work provides a multi-directional approach for realizing efficient InGaN Light-Emitting Diodes (LEDs).
• 

  Sustainability-led Designs through Digital Twins

  Dr. Eric Lou

  Oct 22, 13:00 - 14:00

  B9 L2 H2

  We will explore a novel process flow in the usage of laser scanning for existing buildings to support sustainability-led design by a new scan-to-BIM process, materials identification through hyperspectral imaging, environmental schemes, and materials embodied energy whole lifecycle assessments.
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  Pasqal quantum computing: from hardware to applications

  Krisztian Benyo

  Oct 22, 12:00 - 13:00

  B9 L2 H2

  quantum computing

  During this talk, we shall deep dive into the neutral atoms quantum machine of PASQAL to learn what makes such a machine tick. Following along the full stack approach of Pasqal, we will focus on how such a computer can be used to address hard combinatorial problems, machine learning-related tasks, as well as quantum simulation-based problems present in all walks of life.

Oct 15 - Oct 22, 2023

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  Latent Gaussian Spatial Modelling with Change of Support

  Erick Chacon Montalvan, Postdoctoral fellow, Statistics Geohealth Group, KAUST

  Oct 19, 12:00 - 13:00

  B9 L2 H2

  Spatial data analysis commonly needs to deal with spatial data derived from multiple sources (e.g. satellites, stations, survey samples) with different supports, but associated with the same properties of a spatial phenomenon under interest. Usually, predictors are also measured on different spatial supports than the response variable.

Oct 8 - Oct 15, 2023

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  Quantinuum’s Full Stack Approach to Quantum Computing

  Dr. Jenni Strabley, Anand Shah, Dr. Brian Neyenhuis

  Oct 12, 16:00 - 18:00

  KAUST

  Quantinuum

  Quantinuum is the world’s largest integrated quantum computing company. Quantinuum has developed the H-Series quantum computers based on a trapped-ion architecture using the unique and highly-scalable QCCD architecture (QCCD = Quantum Charge-Coupled Device), and released its first two generations: the System Model H1 and H2. The H-Series QPUs are well-known for their superior, low noise performance and differentiating capabilities such as all-to-all connectivity and mid-circuit measurement with very low qubit cross talk. Dr. Brian Neyenhuis will discuss how the QCCD architecture enables these differentiators and what researchers can do with the H-Series quantum computers that they cannot do on other commercially available quantum computers. As a full stack quantum computing company, Quantinuum also makes TKET, an open source SDK compiler and optimizer, as well as algorithm and application layers for applications in Machine Learning, Finance, Chemistry, and modeling of Quantum Systems. Anand Shah will review the application and algorithm activities at Quantinuum.
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  Space–Time Multiscale Modeling and Numerics of Sorption Kinetics

  Clarissa Astuto, Postdoctoral Research Fellow, Applied Mathematics and Computational Sciences

  Oct 12, 12:00 - 13:00

  B9 L2 H2

  In this talk we propose and validate a Space Multiscale model for the description of particle diffusion in the presence of trapping boundaries. We start from a drift diffusion equation in which the drift term describes the effect of bubble traps, and it is simulated by the Lennard–Jones potential.
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  Models and methods for multifluid flow in Lagrangian coordinates

  Prof. Giovanni Russo, Full Professor of Numerical Analysis Department of Mathematics and Computer Science, University of Catania, Italy

  Oct 10, 14:30 - 15:30

  B1 L4 R4102

  Abstract Multifluid has attracted a lot of attention in recent years. In particular, stratified fluids composed by a sequence of alternate layers show interesting macroscopic properties, which may be quite different from those of the individual fluids which constitute the stratified system. On a macroscopic scale, such a system can be considered a sort of fluid metamaterial. Several models have been proposed to describe the stratified system as a single effective fluid. After an introduction, we present two homogenized models of the stratified fluid system, which are based on isentropic
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  Mitigating Bias in Predictions from Machine Learning Models

  Ricardo Henao Associate Professor, Bioengineering

  Oct 9, 11:30 - 12:30

  B9 L2 H2 H2

  machine learning risk prediction text generation

  The increasing popularity of machine learning models in real-world automated and decision support systems has underscored the need for assessing and then mitigating biases that may manifest, often spuriously, in their predictions either at the population, sub-population, or individual level. These biases can be assessed in terms of calibration, performance stratification, fairness metrics, prediction interval coverages, etc., and are mainly due to poor model specification (e.g., overparameterization without regularization or loss/likelihood mismatch) or data collection issues (e.g., population misrepresentation or unmeasured confounders).

Oct 1 - Oct 15, 2023

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  Coverage Performance Analysis for the Full Connected Underwater Acoustic Communication Network

  Jiajie Xu, Postdoctoral Research Fellow, Electrical and Computer Engineering

  Oct 8, 13:00 - 14:30

  B1 L3 R3119

  During the last decade, the demand for wireless connection over the world has tremendously increased, including the areas where unconnected. Raising with topics like "Breaking down the data divide," "Connect to unconnected," etc. In the sixth-generation wireless network, the underwater world attracts a lot of attention. Besides that, the huge unexplored resource is another driving force for underwater exploration. Unlike the well-developed Internet of Things (IoT) on the terrestrial, there is almost no underwater wireless communication network, not to mention the underwater IoT.
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  Leveraging an off-the-shelf smartphone as a DIY health-diagnostic tool

  Muhammad M. Rahman, Research Scientist, Electrical and Computer Engineering

  Oct 8, 12:00 - 13:00

  B9 L2 H2

  DIY smartphone

  Keeping in mind the current proliferation of smartphones as a popular hand-held gadget (with adequate sensing and computational capabilities), we propose to use smartphones as a health diagnostic tool for do-it-yourself (DIY) monitoring of one’s own health.
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  Low-Coherence Surface-Emitting Lasers for Optical Wireless Communication and Low-Speckle Illumination

  Omar Alkhazragi, Ph.D. Student, Electrical and Computer Engineering

  Oct 8, 10:00 - 11:30

  B2 L5 R5220

  Highly coherent light, although beneficial in specific applications, suffers from the formation of speckles, resulting in poor imaging, lighting, and projection/display quality. Moreover, the long coherence length limits the resolution in interference based sensing. The aim of this dissertation is to design low-coherence surface-emitting lasers to push simultaneous illumination and optical wireless communication (OWC) toward reliable implementation with higher speeds.

Oct 1 - Oct 8, 2023

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  Security, Privacy, and Human

  Eman Alashwali, Assistant Professor, the College of Computing and IT, King Abdulaziz University (KAU), KSA

  Oct 5, 15:30 - 16:30

  B4 L5 R5209

  cybersecurity privacy google

  Security and privacy systems are often composed of complex components and details. However, users’ experience shouldn’t be as complex. In this seminar, Eman will discuss the human factor in the security and privacy chain. While human privacy perceptions and behaviors have been investigated in Western societies, little is known about these issues in non-Western societies.
• 

  How many sample points do we need for least squares?

  Diogo Gomes, Program Chair, Applied Mathematics and Computational Sciences

  Oct 5, 12:00 - 13:00

  B9 L2 H2

  Abstract The goal of the least squares method is to find the best linear combination of certain given functions to fit given data. A typical example is the following: given pairs $(x_i, y_i)$, find the coefficients, $a$ and $b$ that minimize the error $\sum_i (y_i-a -b x_i)^2$. In this case, if at least two of the coordinates $x_i$ are distinct, we can always find coefficients $a$ and $b$. However, if the $x_i$ are randomly sampled, these coordinates may be extremely close, creating large errors in the estimated values of $a$ and $b$. In this talk, we investigate lower bounds on the minimum
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  Several derivations of the degenerate Cahn-Hilliard equation via singular limits

  Dr. Jakub Skrzeczkowski,Mathematical Institute, University of Oxford

  Oct 4, 16:00 - 17:00

  B1 L4 R4214

  The degenerate Cahn-Hilliard equation, initially introduced in material science, is nowadays used in several different fields, including biology (tumor growth, cell-cell adhesion) and fluid dynamics (high-friction limit in the Euler-Korteweg equation).
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  Multiphase flow in heterogeneous geologic media

  Prof. Stephan K. Matthai, Chair of Reservoir Engineering, The University of Melbourne at Parkville

  Oct 3, 16:00 - 17:00

  B5 L5 R5209

  Multiphase flow heterogeneous geologic media

  Heterogeneous permeability, porosity, capillary pressure, and strength are key characteristics of sedimentary and volcanic rocks in geologic reservoirs. In many cases, the heterogeneity is due to nested geological features like the mm-scale coarse-fine intercalations of cross-bedded sandstones, or the km-scale channel, levy, and overbank facies associations in a fluvial environment of deposition. Where such rocks have experienced an overprint by deformation or reactive fluid flow, initial heterogeneities might be amplified even further: fracturing can impart long-range spatial correlations on the permeability structure, strongly amplifying permeability anisotropy, even in the absence of a noticeable increase of porosity.
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  Network Security, Internet Measurement and Threat Intelligence

  Marc Dacier, Professor, Computer Science

  Oct 2, 11:30 - 12:30

  B9 L2 H2 H2

  network security threat intelligence internet measurement

  In this talk, we will show how, through a large scale Internet measurement campaign, we have been able to experimentally validate a novel technique to automatically detect malicious webscrapers bots taking advantage of so called Residential IP proxy providers. That technique has then been deployed in a real world environment and enabled us, thanks to a novel geolocalization technique, to identify malicious actors hiding behind these infrastructures, leading to actionable threat intelligence for the victims.

Sep 24 - Oct 8, 2023

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  Recent Progress at KAUST's Sensors Lab

  Khaled Salama, Professor, Electrical and Computer Engineering

  Oct 1, 12:00 - 13:00

  B9 L2 H2

  In this talk, we will go over the various projects in the lab and discuss the challenges faced by lab members and the opportunities that exist.

Sep 24 - Oct 1, 2023

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  Decision Trees for Fault Diagnosis in Circuits and Switching Networks - 2023-09-28

  Mikhail Moshkov, Professor, Applied Mathematics and Computational Sciences

  Sep 28, 12:00 - 13:00

  B9 L2 H2

  We study theoretical problems of fault diagnosis in circuits and switching networks, which are among the most fundamental models for computing Boolean functions.
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  Toward Sustainable Transportation: A Driver-Centric Approach to Deploying Charging Infrastructure for Electric Vehicles

  Duc Minh Nguyen, Ph.D., Electrical and Computer Engineering

  Sep 28, 10:00 - 11:30

  B1 L4 R4214

  Whether the future of transportation is going to be electric or not is no longer a question. Electric vehicles (EVs) offer several benefits toward global sustainability. However, without a variety of charging infrastructures that cover diverse forthcoming charging needs, the speed of vehicle electrification may be slow and limited. In the coming years, we project that charging stations will still likely meet most personal demands. However, novel charging alternatives such as dynamic charging systems, i.e., electrified roads that wirelessly charge EVs on the go, will fit into various public and commercial scenarios. In this thesis, we present a driver-centric approach to planning these infrastructures.
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  Wireless Powered Communications in the Era of 6G

  Ioannis Krikidis, Associate Professor, Electrical and Computer Engineering, University of Cyprus

  Sep 28, 09:00 - 10:00

  B1 L4 R4214

  Wireless power transfer energy harvesting

  We discuss the principles of WPC and we highlight its main network architectures as well as the fundamental trade-off between information and energy transfer. By following a bottom-up cross-layer approach, several examples, that deal with the fundamentals of WPC as well as its integration in modern communication systems, are presented. Specifically, we deal with circuit models for WPT, information-theoretic limits, signal processing aspects and waveform design, and system-level analysis by using stochastic geometry tools. Future research directions and challenges are also pointed out.
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  Device accelerated solvers for PDEs. Current status and future perspectives

  Stefano Zampini, Senior Research Scientist, Hierarchical Computations on Manycore Architectures

  Sep 26, 16:00 - 17:00

  B5 L5 R5220

  Shaheen GPU supercomputing petsc PDEs

  In the next months, KAUST expects to place into service Shaheen-3, a supercomputer with a GPU partition whose planned 1 Exaflop/s HPL AI capability would rank it in the Top 6 globally if delivered today.
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  Creating Cognitive Enterprises Through Decision Intelligence

  Dr. Anas Alfaris, Dr. Ahmad Alabdulkareem

  Sep 25, 11:30 - 12:30

  B9 L2 H2 H2

  Intelmatix artificial intelligence

  It is difficult to predict the future, but ultimately, what matters is creating the future we want to live in. Our past and present are the product of our previous decisions. The decisions we make today will pave the way for the future. It is important that the right decision is made at the right time leading to the right outcome, paving the way towards the desired future.

Sep 17 - Sep 24, 2023

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  Predictive Performance Test based on the Exhaustive Nested Cross-Validation for High-dimensional data

  Iris Ivy Gauran, Postdoctoral Research Fellow, Biostatistics Group

  Sep 21, 12:00 - 13:00

  B9 L2 H2

  Cross-validation is an algorithmic technique extensively used for estimating the prediction error, tuning the regularization parameter, and choosing between competing predictive rules.
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  Breiman’s Samplers or Models? There is a little but important difference: Models, including priors, can be wrong!

  Dr. Yannis Yatracos

  Sep 20, 15:00 - 16:00

  B1 L2 R2202

  Breiman (2001) urged statisticians to provide tools when the data, X=s(θ,Y); sampler s is available as Black-Box, parameter θεΘ, Y is random, either observed or latent. The paper’s discussants, D. R. Cox and B. Efron, looked at the problem as X-prediction, surprisingly neglecting the statistical inference for θ, and disagreed with the main thrust of the paper.
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  Additive Schwarz Methods for Convex Optimization - Theory and Applications

  Jongho Park, Research Scientist, Applied Mathematics and Computational Sciences

  Sep 19, 16:00 - 17:00

  B5 L5 R5209

  Additive Schwarz methods convex optimization

  This talk is devoted to additive Schwarz methods for convex optimization. First, we propose an abstract framework for additive Schwarz methods for convex optimization. The framework's flexibility allows it to handle composite optimization problems and inexact local solvers. Moreover, it establishes a sharp convergence theory that agrees with the classical theory when addressing linear problems.
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  Neuro-symbolic methods for Semantic Web ontologies

  Robert Hoehndorf, Associate Professor, Computer Science

  Sep 18, 11:30 - 12:30

  B9 L2 H2 H2

  Semantic web Ontologies neuro-symbolic methods

  Semantic Web ontologies are widely used to provide a conceptual schema for sharing and integrating data and knowledge using a logic-based language. The content of ontologies may also be used to provide background knowledge in machine learning models or provide domain-specific constraints that can be verified automatically and used for zero-shot predictions. The combination of embedding symbolic representations (such as ontologies) and extracting symbolic representations from the embeddings are two main components of neuro-symbolic AI systems. I will introduce methods for embedding Semantic Web ontologies and outline some of the properties of the embeddings that relate to model and proof theory.

Sep 10 - Sep 24, 2023

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  Universal light encoders: artificial intelligent optical hardware for real-time hyperspectral imaging and ultrasensitive detection

  Andrea Fratalocchi, Professor, Electrical and Computer Engineering

  Sep 17, 12:00 - 13:00

  B9 L2 H2

  Metasurfaces machine learning

  In this talk, I will review the fundamentals and application of this technology in various areas, ranging from the inverse design of ultra-flat optical components to HyplexTM, an innovative camera for acquiring and processing high-resolution hyperspectral videos in real-time at 30 frames per second.

Sep 10 - Sep 17, 2023

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  Goodness-of-fit tests for multivariate skewed distributions based on the characteristic function

  Maicon J. Karling, Postdoctoral Research Fellow, Statistics

  Sep 14, 12:00 - 13:00

  B9 L2 H2

  Goodness-of-fit tests determine how well a set of observed data fits a particular probability distribution. They can also show if some categorical variable follows a hypothesized family of distributions.
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  Stability and Asymptotics in Electrohydrodynamics

  Nuno J. Alves, Ph.D. Student, Applied Mathematics and Computational Sciences

  Sep 12, 15:00 - 17:00

  B1 L4 R4214

  Relative Energy Analysis relative energy method

  This dissertation focuses on the relative energy analysis of two-species fluids composed of charged particles. In particular, it explores several applications of the relative energy method to Euler-Poisson systems, enabling a comprehensive stability analysis of these systems.
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  Spatial Models and Extreme-Value Methods for Wildfire Risk Assessment

  Daniela Cisneros, Ph.D. Student, Statistics

  Sep 11, 16:00 - 17:00

  B3 L5 R5220

  extreme statistics Applied Machine Learning geospatial statistics

  The statistical modeling of spatial and extreme events provides a framework for the development of techniques and models to describe natural phenomena in a variety of environmental, geoscience, and climate science applications. In a changing climate, various natural hazards, such as wildfires, are believed to have evolved in frequency, size, and spatial extent, although regional responses may vary.
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  Towards Cyber Resilient Autonomous Vehicle Ecosystems: Pitfalls and Enablers

  Sep 11, 11:30 - 12:30

  B9 L2 H2 H2

  cybersecurity autonomous vehicles

  Currently, there is a substantial push towards autonomous vehicles in the market. However, fully autonomous vehicles, using extensive fault-tolerance e.g., in x-by-wire functions, are still not quite safe from an accidental faults perspective. Furthermore, they present an even greater threat surface to combined accidental and malicious faults. This pitfall has been very slowly recognized by car makers. The consequences of such accidents or attacks are likely to be severe, life-threatening included. This talk will discuss this threat surface in an analysis including the whole ecosystem.

Sep 3 - Sep 17, 2023

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  Gbps Laser-based underwater wireless optical communication

  Boon Ooi, Professor, Electrical and Computer Engineering

  Sep 10, 12:00 - 13:00

  B9 L2 H2

  underwater optical communications photonics

  I will focus my discussion on optoelectronic devices and system challenges facing long-distance, multiple-Gbps underwater wireless optical communication. The future perspective of underwater photonics will also be discussed.

Sep 3 - Sep 10, 2023

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  From Euler flows with friction to gradient flows and applications

  Athanasios Tzavaras, Professor, Applied Mathematics and Computational Sciences

  Sep 7, 12:00 - 13:00

  B9 L2 H2

  I will review some works on the high-friction limit (or small mass approximation) from Euler flows to advection-diffusion systems that are gradient flows, and related asymptotic problems in fluid mechanics. The formulation exploits the variational structure of compressible Euler flows and is connected to the interpretation of nonlinear Fokker-Planck systems as gradient flows in Wasserstein distance.
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  Mean Field Games price formation models

  Julian David Gutierrez Pineda, Ph.D. Student, Applied Mathematics and Computational Sciences

  Sep 6, 14:00 - 16:00

  B1 L4 R4214

  mean-field games Applied Machine Learning

  This thesis studies mean-field games (MFGs) models of price formation. The thesis focuses explicitly on a MFGs price formation model proposed by Gomes and Saúde. The thesis is divided into two parts. The first part examines the deterministic supply case, while the second part extends the model to incorporate a stochastic supply function. We explore different approaches, such as Aubry-Mather theory, to study the properties of the MFGs price formation model and alternative formulations using a convex variational problem with constraints. We propose machine-learning-based numerical methods to approximate the solution of the MFGs price formation model in the deterministic and stochastic setting.
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  Universal Portfolio Algorithm and Confidence Sequences

  Francesco Orabona, Associate Professor, Computer Science

  Sep 5, 16:00 - 17:00

  B5 L5 R5209

  Universal Portfolio algorithm

  In this talk, I will describe a surprising application for a known online learning problem and its optimal algorithm.
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  Model-Based Computational Cryo-Electron Tomography Joint Reconstruction with Awareness of Noise

  Yuanhao Wang, Ph.D. Student, Electrical and Computer Engineering

  Sep 4, 17:30 - 19:00

  B1 L2 R2202

  Tilt-series cryo-electron tomography (cryo-ET) is an established imaging tech- nique used in several fields like biology and material science. Despite its success, cryo-ET remains an arduous task. The missing-wedge acquisition, the motion, and the high level noise are the main challenges existing in this field. In this dissertation, we tackle these challenges through the exploration of three distinct approaches: plug and play approach, adaptive differentiable density grids and adaptive tensorial density fields representation.
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  Physics-based Simulation in Visual Computing

  Dominik L. Michels, Associate Professor, Computer Science

  Sep 4, 11:30 - 12:30

  B9 L2 H2 H2

  visual computing machine learning physics-based simulation

  This talk covers a selection of previous and current work presenting a broad spectrum of research highlights ranging from simulating stiff phenomena such as the dynamics of fibers and textiles, over liquids containing magnetic particles, to the development of complex ecosystems and weather phenomena. Moreover, connection points to the growing field of machine learning are addressed and an outlook is provided with respect to selected technology transfer activities.

Aug 27 - Sep 10, 2023

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  KAUST Masterclass: Semiconductor Photonics

  Boon Ooi, Professor, Electrical and Computer Engineering

  Sep 3, 13:30 - 17:00

  KAUST

  semiconductor photonics

  Semiconductor Photonics is an immersive master class that explores the cutting-edge field of advanced optoelectronics and its diverse applications. This class brings together experts and enthusiasts to delve into the forefront of research and innovation in semiconductor photonics. Key topics include Semiconductor Laser-Based Lighting and Visible Light Communications, Artificial Intelligent Optoelectronics Hardware for Neuromorphic Computing, Optoelectronic Micro-Devices for Novel AR and VR Displays, and Integrated Silicon Photonics. By covering these varied areas, the class offers a comprehensive understanding of semiconductor photonics and its implications in information technology, healthcare, computing, and beyond.
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  Waves Functional Materials - 2023-09-03

  Ying Wu, Professor, Applied Mathematics and Computational Sciences

  Sep 3, 12:00 - 13:00

  B9 L2 H2

  Wave functional materials Metasurfaces

  I will introduce the development of effective medium and deep learning models, two distinct methods in the design of metamaterials, followed by some illustrative examples demonstrating the intriguing properties, such as redirection, emission rate enhancement, wave steering, and cloaking.

Aug 27 - Sep 3, 2023

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  Efficient Intensity Estimation Using Adaptive Bandwidths on Linear Networks: A Study and Application in Traffic Accident Analysis

  Jonatan A. González, Postdoctoral Research Fellow, Statistics

  Aug 31, 12:00 - 13:00

  B9 L2 H2

  Estimating first-order intensity functions is crucial in the analysis of point patterns on linear networks, but selecting suitable bandwidths for non-parametric methods remains challenging. We propose an adaptive intensity estimator for the heating kernel that adjusts bandwidths based on data points, a novel approach in this context.
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  Finite element approximations for variable-order fractional diffusion problems

  Prof. Wenyu Lei, University of Electronic Science and Technology of China

  Aug 29, 16:00 - 17:00

  B4 L5 R5209

  Finite elements Variable-order fractional diffusion problems

  We propose a finite element scheme for fractional diffusion problems with varying diffusivity and fractional order. A number of challenges are encountered when discretizing such problems. The first is the heterogeneous kernel singularity in the fractional integral operator. The second comes from the dense discrete operator with its quadratic growth in memory footprint and arithmetic operations. To address these challenges, we propose a strategy that decomposes the system matrix into three components. The first is a sparse matrix that handles the singular near-field separately and is computed by adapting singular quadrature techniques available for the homogeneous case to the case of spatially variable order.
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  Thwarting Drones’ Threat

  Roberto Di Pietro, Professor, Computer Science

  Aug 28, 11:30 - 13:00

  B9 L2 H2 H2

  UAVs, or drones, are a dual-use technology that is gaining momentum, with applications spanning from agriculture to warfare. In this talk we will survey some of the threats posed by drones, and will discuss some scientific contributions to the field aimed at providing a way to reduce the risk posed by a rogue use of this technology. We will also highlight some related research directions.

Aug 20 - Sep 3, 2023

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  Enabling Next Generation Wireless Communication through mm-Wave Reconfigurable Intelligent Surface (RIS)

  Atif Shamim, Program Chair, Electrical and Computer Engineering

  Aug 27, 12:00 - 13:00

  B9 L2 H2

  5G and beyond electromagnetic waves

  The mm-wave 5G and beyond communication systems significantly improve the data rate, user capacity, and latency, however, the electromagnetic (EM) wave propagation suffers from high atmospheric attenuation as compared to the sub-6 GHz bands.

Aug 13 - Aug 20, 2023

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  Tackling the Communication Bottlenecks of Distributed Deep Learning Training Workloads

  Chen-Yu (Elton) Ho, Ph.D. Student, Computer Science

  Aug 14, 08:00 - 10:00

  B2 L5 R5220

  This presentation will focus on addressing the communication bottlenecks in distributed deep learning (DDL) training workloads. Deep neural networks (DNNs) are widely used in various domains, but training them can be time-consuming, especially with large models and datasets. Three innovative solutions are proposed and evaluated in the dissertation.

Jul 30 - Aug 6, 2023

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  Hybrid Analysis and Modeling as an Enabler for Digital Twins

  Prof. Adil Rasheed, Computer Science and Engineering, Norwegian University of Science and Technology

  Aug 3, 11:00 - 12:00

  B1 L4 R4214

  hybrid modelling

  During this talk, we will delve into a new paradigm in modeling, called Hybrid Analysis and Modeling, which has the ability to combine the best of both the physics-driven and data-driven worlds, while eliminating their weaknesses. This approach has shown remarkable utility in the context of digital twin technology and will be demonstrated through a lab-scale experimental setup, mimicking building energy modeling.