22 papers · ranked by Valyu relevance
David Crompton, Prerana Keerthi, Luka Milosevic, Maximilian Scherer
Herein, we present the 2.0 update of FiNNpy, which expands the toolkit’s initial scope from the analysis of multi-site electrophysiological activity to track information propagation to include source reconstruction capability for MEG signals. Following the toolkit’s de- sign guidelines, the new functionality has been…
George C. O’Neill, Daniel N. Barry, Tim M. Tierney, Stephanie Mellor + 2 more
'Eleanor A. Maguire' 'Gareth R. Barnes'] Beamforming is one of the most commonly used source reconstruction methods for magneto- and electroencephalography (M/EEG). One underlying assumption, however, is that distant sources are uncorrelated and here we tested whether this is an appropriate model for the human…
Guillermo Nuñez Ponasso, Derek A. Drumm, Hannes Oppermann, Abbie Wang + 5 more
Modern automated human head segmentations can generate high-resolution computational meshes involving many non-nested tissues. However, most source reconstruction software is limited to 3 –4 nested layers of low resolution and a small number of dipolar sources∼ 10, 000. Recently, we introduced modeling techniques for…
Atyab Khalifa Al-Shaqsi, Heba Mohammed Al-Subhi, Xianchao Wang, Shujaat Khan + 1 more
Reconstructing unknown electromagnetic sources from far-field radiation patterns is a fundamental inverse problem with broad applications in biomedical imaging, non-destructive testing, and telecommunications. In practical settings, however, collecting dense multi-frequency far-field measurements at the Nyquist…
Alan A. S. Amad, Antônio André Novotny, Bojan B. Guzina
In this work, we propose a full-waveform technique for the spatial reconstruction and characterization of (micro-) seismic events via joint source location and moment tensor inversion. The approach is formulated in the frequency domain, and it allows for the simultaneous inversion of multiple point-like events. In the…
Janne P. Tamminen
| 1. | Introduction | 1 | | --- | --- | --- | | 2. | Mathematical model | 3 | | 2.1. | About Pennes' bio-heat model | 4 | | 2.2. | Static full-space solution | 5 | | 2.3. | Dynamic full-space solution | 6 | | 2.4. | Some examples | 8 | | 3. | Literature review | 9 | | 4. | Algorithms | 10 | | 4.1. | General algorithm…
Jingjing Yu, Fang Liu, L. C. Jiao, Shuyuan Yang + 1 more
A finite element mesh aggregating approach is presented to reconstruct images of multiple internal bioluminescence sources. Rather than assuming independence between mesh nodes, the proposed reconstruction strategy exploits spatial structure of nodes and aggregation feature of density distribution on the finite element…
Nela Cicmil, Holly Bridge, Andrew J. Parker, Mark W. Woolrich + 1 more
'Kristine Krug'] Magnetoencephalography (MEG) allows the physiological recording of human brain activity at high temporal resolution. However, spatial localization of the source of the MEG signal is an ill-posed problem as the signal alone cannot constrain a unique solution and additional prior assumptions must be…
Rodolfo Abreu, Júlia F. Soares, Ana Cláudia Lima, Lívia Sousa + 3 more
'Sónia Batista' 'Miguel Castelo-Branco' 'João Valente Duarte'] Reconstructing EEG sources involves a complex pipeline, with the inverse problem being the most challenging. Multiple inversion algorithms are being continuously developed, aiming to tackle the non-uniqueness of this problem, which has been shown to be…
Chaitanya Chintaluri, Marta Kowalska, Władysław Średniawa, Michał Czerwiński + 3 more
Kernel Current Source Density (kCSD), which we introduced in 2012, is a kernel-based method to estimate current source density (CSD) from extracellular potentials recorded with arbitrarily placed electrodes. Estimating reconstruction errors in CSD has been an outstanding challenge. To address it, here we revisit kCSD…
Takashi Ohe
This paper is concerned with a reconstruction method for multiple moving point/dipole wave sources. We assume that the number, locations, and magnitudes/moments of wave sources are unknown, and consider the problem to reconstruct these parameters from the measurement of the wave field on the boundary. For this problem…
Hengyong Yu, Changguo Ji, Ge Wang
To maximize the time-integrated X-ray flux from multiple X-ray sources and shorten the data acquisition process, a promising way is to allow overlapped projections from multiple sources being simultaneously on without involving the source multiplexing technology. The most challenging task in this configuration is to…
Zhenhao Gu, Hongyi Xin, Puru Sharma, Gary Yipeng Goh + 2 more
As DNA data storage systems gain popularity, the need for an efficient trace reconstruction algorithm becomes increasingly important. These algorithms aim to reconstruct the original encoded sequence from its noisy sequenced copies (or “traces”), enabling a faster and more reliable decoding process. Previous works have…
Wandrille Duchemin, Vincent Daubin, Eric Tannier
Background We propose the computational reconstruction of a whole bacterial ancestral genome at the nucleotide scale, and its validation by a sequence of ancient DNA. This rare possibility is offered by an ancient sequence of the late middle ages plague agent. It has been hypothesized to be ancestral to extant Yersinia…
Yuxuan Chen, Nark Spivack, Orsola Rath Spivack
The paper develops a method for recovering a one-dimensional rough surface profile from scattered wave field, using a single receiver and repeated measurements when the surface is moving with respect to source and receiver. This extends a previously introduced marching method utilizing low grazing angles, and addresses…
Vladimir Kondratyev, Marian Dryzhakov, Timur Gimadiev, Dmitriy Slutskiy
In this work, we provide further development of the junction tree variational autoencoder (JT VAE) architecture in terms of implementation and application of the internal feature space of the model. Pretraining of JT VAE on a large dataset and further optimization with a regression model led to a latent space that can…
Kelsey Hatzell, Yanjie Zheng
X-ray Computed Tomography (CT) is a non-invasive, non-destructive approach to imaging materials, material systems and engineered components in two- and three- dimensions. Acquisition of 3D images requires the collection of hundreds or thousands of through-thickness X-ray radiographic images from different angles. Such…
Eric Grinstein, Elisa Tengan, Bilgesu Çakmak, Thomas Dietzen + 4 more
'Leonardo Nunes' 'Toon van Waterschoot' 'Mike Brookes' 'Patrick A. Naylor'] In the last three decades, the Steered Response Power (SRP) method has been widely used for the task of Sound Source Localization (SSL), due to its satisfactory localization performance on moderately reverberant and noisy scenarios. Many works…
Authors not listed
Cobalt- and copper-based oxides have emerged as cost-effective electrocatalysts for the electrochemical nitrate reduction reaction (NO3RR) to ammonia. However, the cathodic potentials required for NO3RR induce irreversible structural transformations that often compromise catalyst stability and selectivity, depending on…
David A. Rasmussen, Fangfang Guo
In the presence of recombination individuals may inherit different regions of their genome from different ancestors, resulting in a mosaic of phylogenetic histories across their genome. Ancestral recombination graphs (ARGs) can capture how phylogenetic relationships vary across the genome due to recombination, but…
Brian Moths, Abbas Ourmazd
X-ray free-electron lasers are being used to determine the three-dimensional structure of objects from random snapshots. The two apparently very different Bayesian algorithms capable of performing this at ultra-low signal are fundamentally the same.
Niv Derech, Ayellet Tal, Ilan Shimshoni
Puzzle solving is a difficult problem in its own right, even when the pieces are all square and build up a natural image. But what if these ideal conditions do not hold? One such application domain is archaeology, where restoring an artifact from its fragments is highly important. From the point of view of computer…