no code implementations • 24 Mar 2024 • Ryan Barron, Maksim E. Eren, Manish Bhattarai, Selma Wanna, Nicholas Solovyev, Kim Rasmussen, Boian S. Alexandrov, Charles Nicholas, Cynthia Matuszek
One of the challenges in constructing a KG from scientific literature is the extraction of ontology from unstructured text.
no code implementations • 19 Sep 2023 • Nicholas Solovyev, Ryan Barron, Manish Bhattarai, Maksim E. Eren, Kim O. Rasmussen, Boian S. Alexandrov
Given a small initial "core" corpus of papers, we build a citation network of documents.
no code implementations • 4 Sep 2023 • Maksim E. Eren, Manish Bhattarai, Kim Rasmussen, Boian S. Alexandrov, Charles Nicholas
Here we introduce and showcase preliminary capabilities of a new method that can perform precise identification of novel malware families, while also unifying the capability for malware/benign-ware classification and malware family classification into a single framework.
no code implementations • 21 Aug 2022 • Maksim E. Eren, Nick Solovyev, Manish Bhattarai, Kim Rasmussen, Charles Nicholas, Boian S. Alexandrov
As the amount of text data continues to grow, topic modeling is serving an important role in understanding the content hidden by the overwhelming quantity of documents.
no code implementations • 4 May 2022 • Maksim E. Eren, Luke E. Richards, Manish Bhattarai, Roberto Yus, Charles Nicholas, Boian S. Alexandrov
Non-negative matrix factorization (NMF) with missing-value completion is a well-known effective Collaborative Filtering (CF) method used to provide personalized user recommendations.
no code implementations • 1 Dec 2021 • Valentin Stanev, Erik Skau, Ichiro Takeuchi, Boian S. Alexandrov
We utilize a recently developed topic modeling method called SeNMFk, extending the standard Non-negative Matrix Factorization (NMF) methods by incorporating the semantic structure of the text, and adding a robust system for determining the number of topics.
no code implementations • 17 Jul 2021 • Maksim E. Eren, Nick Solovyev, Chris Hamer, Renee McDonald, Boian S. Alexandrov, Charles Nicholas
The unprecedented outbreak of Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2), or COVID-19, continues to be a significant worldwide problem.
1 code implementation • 12 Mar 2021 • Elijah Pelofske, Georg Hahn, Daniel O'Malley, Hristo N. Djidjev, Boian S. Alexandrov
Quantum annealing is an emerging technology with the potential to solve some of the computational challenges that remain unresolved as we approach an era beyond Moore's Law.
Quantum Physics
no code implementations • 5 Oct 2020 • Raviteja Vangara, Kim Ø. Rasmussen, Dimiter N. Petsev, Golan Bel, Boian S. Alexandrov
Fractional Brownian motion (fBm) is a ubiquitous diffusion process in which the memory effects of the stochastic transport result in the mean squared particle displacement following a power law, $\langle {\Delta r}^2 \rangle \sim t^{\alpha}$, where the diffusion exponent $\alpha$ characterizes whether the transport is subdiffusive, ($\alpha<1$), diffusive ($\alpha = 1$), or superdiffusive, ($\alpha >1$).
no code implementations • 22 Jun 2020 • Benjamin T. Nebgen, Raviteja Vangara, Miguel A. Hombrados-Herrera, Svetlana Kuksova, Boian S. Alexandrov
An important input for NMF is the latent dimensionality of the data, that is, the number of hidden features, K, present in the explored data set.
no code implementations • 29 Feb 2020 • Duc P. Truong, Erik Skau, Vladimir I. Valtchinov, Boian S. Alexandrov
Nonnegative RESCAL computes a low dimensional tensor representation by finding the latent space containing multiple modalities.
no code implementations • 20 Feb 2018 • Valentin Stanev, Velimir V. Vesselinov, A. Gilad Kusne, Graham Antoszewski, Ichiro Takeuchi, Boian S. Alexandrov
Analyzing large X-ray diffraction (XRD) datasets is a key step in high-throughput mapping of the compositional phase diagrams of combinatorial materials libraries.
no code implementations • 5 Apr 2017 • Daniel O'Malley, Velimir V. Vesselinov, Boian S. Alexandrov, Ludmil B. Alexandrov
Here, we show that the D-Wave 2X can be effectively used as part of an unsupervised machine learning method.
no code implementations • 12 Dec 2016 • Valentin G. Stanev, Filip L. Iliev, Scott Hansen, Velimir V. Vesselinov, Boian S. Alexandrov
The identification of sources of advection-diffusion transport is based usually on solving complex ill-posed inverse models against the available state- variable data records.
no code implementations • 12 Dec 2016 • Filip L. Iliev, Valentin G. Stanev, Velimir V. Vesselinov, Boian S. Alexandrov
Especially difficult is the case when the number of sources of the signals with delays is unknown and has to be determined from the data as well.