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A new methodology for the improvement of the performance of inexpensive static passive electromagnetic skins (SP-EMSs) is presented. The proposed approach leverages on the non-uniqueness of the inverse source problem associated to the…

Systems and Control · Electrical Eng. & Systems 2024-08-14 Giacomo Oliveri , Francesco Zardi , Andrea Massa

Embedded systems acquire information about the real world from sensors and process it to make decisions and/or for transmission. In some situations, the relationship between the data and the decision is complex and/or the amount of data to…

Machine Learning · Computer Science 2021-06-29 Florian Bacho , Dominique Chu

We propose a time-resolved optical measurement scheme for sampling transient charge and spin currents in a bulk centrosymmetric semiconductor. The technique relies on emission of second harmonic light triggered by a pulsed below-gap optical…

Mesoscale and Nanoscale Physics · Physics 2024-06-18 Amin Lakhal , Stéphane Virally , Jacob B. Khurgin , Denis V. Seletskiy

To perform accurate numerical simulations of the traveling-wave tube in time domain, a new approach using field decomposition with large reduction of degrees-of-freedom has been proposed: the discrete model. To assess its validity, we…

Plasma Physics · Physics 2018-04-02 Damien Minenna , Artem Terentyuk , Frédéric André , Yves Elskens , Nikita Ryskin

Image-based lighting is a widely used technique to reproduce shading under real-world lighting conditions, especially in real-time rendering applications. A particularly challenging scenario involves materials exhibiting a sparkling or…

Graphics · Computer Science 2025-07-04 Tom Kneiphof , Reinhard Klein

Attenuation compensation (AC) is beneficial for visual interpretation tasks in single-photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI). However, traditional AC methods require the availability of a transmission…

Medical Physics · Physics 2023-03-21 Zitong Yu , Md Ashequr Rahman , Craig K. Abbey , Barry A. Siegel , Abhinav K. Jha

Graphene has proven to host outstanding mesoscopic effects involving massless Dirac quasiparticles travelling ballistically resulting in the current flow exhibiting light-like behaviour. A new branch of 2D electronics inspired by the…

Mesoscale and Nanoscale Physics · Physics 2018-08-22 Gaetano Calogero , Nick R. Papior , Peter Bøggild , Mads Brandbyge

A simple first-principles mathematical model is developed to predict the performance of a micro photosynthetic power cell ($\mu$PSC), an electrochemical device which generates electricity by harnessing electrons from photosynthesis in the…

Technologies of human action recognition in the dark are gaining more and more attention as huge demand in surveillance, motion control and human-computer interaction. However, because of limitation in image enhancement method and…

Computer Vision and Pattern Recognition · Computer Science 2023-08-30 Jingbo Zeng

Electron devices based on graphene have lately received a considerable interest; in fact, they could represent the ultimate miniaturization, since the active area is only one atom tick. However, the gapless dispersion relation of graphene…

Mathematical Physics · Physics 2025-12-04 Giovanni Nastasi , Vittorio Romano

The use of electric fields for signalling and control in liquids is widespread, spanning bioelectric activity in cells to electrical manipulation of microstructures in lab-on-a-chip devices. However, an appropriate tool to resolve the…

The design and evaluation of complex systems can benefit from a software simulation - sometimes called a digital twin. The simulation can be used to characterize system performance or to test its performance under conditions that are…

Computer Vision and Pattern Recognition · Computer Science 2023-03-14 Zhenyi Liu , Devesh Shah , Alireza Rahimpour , Devesh Upadhyay , Joyce Farrell , Brian A Wandell

Autonomous driving is a challenging task that has gained broad attention from both academia and industry. Current solutions using convolutional neural networks require large amounts of computational resources, leading to high power…

Computer Vision and Pattern Recognition · Computer Science 2025-02-12 Xuelei Chen , Sotirios Spanogianopoulos

The aim of this work is to prove that it is possible to realise an optical system which produces as output a light intensity that can be expressed in the same mathematical form of the spin glass Hamiltonian. The optical system under study…

Disordered Systems and Neural Networks · Physics 2020-10-27 Erik Hörmann

An integrated simulation approach fully based upon particle-in-cell (PIC) model is proposed, which involves both fast particle generation via laser solid-density plasma interaction and transport and energy deposition of the particles in…

Plasma Physics · Physics 2015-01-12 W. -M. Wang , P. Gibbon , Z. -M. Sheng , Y. -T. Li

Visible light communication (VLC) is an emerging technique that uses light-emitting diodes (LED) to combine communication and illumination. It is considered as a promising scheme for indoor wireless communication that can be deployed at…

Signal Processing · Electrical Eng. & Systems 2017-09-19 Houssem Sifaou , Ki-Hong Park , Abla Kammoun , Mohamed-Slim Alouini

We present the first end to end approach for real time material estimation for general object shapes with uniform material that only requires a single color image as input. In addition to Lambertian surface properties, our approach fully…

Computer Vision and Pattern Recognition · Computer Science 2018-05-07 Abhimitra Meka , Maxim Maximov , Michael Zollhoefer , Avishek Chatterjee , Hans-Peter Seidel , Christian Richardt , Christian Theobalt

We present a networked, high performance graphics system that combines dynamic, high quality, ray traced global illumination computed on a server with direct illumination and primary visibility computed on a client. This approach provides…

Distributed, Parallel, and Cluster Computing · Computer Science 2021-03-11 Michael Stengel , Zander Majercik , Benjamin Boudaoud , Morgan McGuire

We present theoretical foundations and numerical demonstration of an efficient method for performing time-dependent many-electron simulations for electronic transport. The method employs the concept of stroboscopic wavepacket basis for the…

Materials Science · Physics 2014-05-06 Martin Konôpka , Peter Bokes

In this paper, we explore an efficient variant of convolutional sparse coding with unit norm code vectors where reconstruction quality is evaluated using an inner product (cosine distance). To use these codes for discriminative…

Computer Vision and Pattern Recognition · Computer Science 2017-10-06 Bailey Kong , Charless C. Fowlkes