123 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Yale UniversityUS14 papers
- Sorbonne UniversitéFR6 papers
- Centre National de la Recherche ScientifiqueFR5 papers
- Université Paris Sciences et LettresFR5 papers
- Laboratório Interinstitucional de e-AstronomiaBR4 papers
- Universidade Estadual Paulista (Unesp)BR4 papers
- Universidade Tecnológica Federal do ParanáBR4 papers
- Valongo ObservatoryBR4 papers
- Akdeniz UniversityTR3 papers
- Instituto de Astrofísica de AndalucíaES3 papers
- Institut Polytechnique des Sciences AvancéesFR3 papers
- Laboratoire d’études spatiales et d’instrumentation en astrophysiqueFR3 papers
60 papers
Constraining the size, shape, and albedo of the large Trans-Neptunian Object (28978) Ixion with multi-chord stellar occultations
Y. Kilic, F. Braga-Ribas, C. L. Pereira +81
Trans-Neptunian objects (TNOs) are among the most primitive remnants of the early Solar System, and constraining their sizes, shapes, albedos, and surface properties is essential f…
Gravitational collapse with torsion and universe in a black hole
Nikodem Popławski
We consider gravitational collapse of a fluid sphere with torsion generated by spin, which forms a black hole. We use the Tolman metric and the EinsteinCartan field equations wi…
The growth of a lithium abundance dispersion in pre main sequence stars
R. J. Jackson, R. D. Jeffries, E. Tognelli
Lithium is predicted, and observed, to be depleted in contracting, low-mass pre main sequence (PMS) stars. Yet these stars reach the zero age main sequence (ZAMS) with a spread in…
A First-Principles Based Risk Assessment Framework and the IEEE P3396 Standard
Richard J. Tong, Marina Cortês, Jeanine A. DeFalco +2
Generative Artificial Intelligence (AI) is enabling unprecedented automation in content creation and decision support, but it also raises novel risks. This paper presents a first-p…
Pedagogy of Teaching Pointers in the C Programming Language using Graph Transformations
Adwoa Donyina, Reiko Heckel
Visual learners think in pictures rather than words and learn best when they utilize representations based on graphs, tables, charts, maps, colors and diagrams. We propose a new pe…
Evaporation Characteristics of Heat Pipes with Sub-Critical Nanopores
Sumith Yesudasan
This study explores heat transfer mechanisms in heat pipes with sub-critical nanopores using coarse-grained molecular dynamics (CGMD) simulations, aiming to enhance thermal managem…
A study of centaur (54598) Bienor from multiple stellar occultations and rotational light curves
J. L. Rizos, E. Fernández-Valenzuela, J. L. Ortiz +40
Centaurs, distinguished by their volatile-rich compositions, play a pivotal role in understanding the formation and evolution of the early solar system, as they represent remnants…
Black holes in the expanding Universe
Nikodem Popławski
The McVittie metric does not describe a physical black hole in an expanding Universe because the curvature scalar and pressure at its event horizon are infinite. We show that exten…
Sandwich attack: Multi-language Mixture Adaptive Attack on LLMs
Bibek Upadhayay, Vahid Behzadan
Large Language Models (LLMs) are increasingly being developed and applied, but their widespread use faces challenges. These include aligning LLMs' responses with human values to pr…
Deep Learning Based Event Reconstruction for Cyclotron Radiation Emission Spectroscopy
A. Ashtari Esfahani, S. Böser, N. Buzinsky +48
The objective of the Cyclotron Radiation Emission Spectroscopy (CRES) technology is to build precise particle energy spectra. This is achieved by identifying the start frequencies…
Kilometer-precise (UII) Umbriel physical properties from the multichord stellar occultation on 2020 September 21
M. Assafin, S. Santos-Filho, B. E. Morgado +39
We report the results of the stellar occultation by (UII) Umbriel on September 21st, 2020. The shadow crossed the USA and Canada, and 19 positive chords were obtained. A limb param…
The two rings of (50000) Quaoar
C. L. Pereira, B. Sicardy, B. E. Morgado +66
Quaoar is a classical Trans-Neptunian Object (TNO) with an area equivalent diameter of 1,100 km and an orbital semi-major axis of 43.3 astronomical units. Based on stellar occultat…
General-relativistic waveparticle duality with torsion
Francisco Ribeiro Benard Guedes, Nikodem Janusz Popławski
We propose that the four-velocity of a Dirac particle is related to its relativistic wave function by . This relativistic waveparticle duality relation is…
Localized growth drives spongy mesophyll morphogenesis
John D. Treado, Adam B. Roddy, Guillaume Théroux-Rancourt +5
The spongy mesophyll is a complex, porous tissue found in plant leaves that enables carbon capture and provides mechanical stability. Unlike many other biological tissues, which re…
Mitigation of Adversarial Policy Imitation via Constrained Randomization of Policy (CRoP)
Nancirose Piazza, Vahid Behzadan
Deep reinforcement learning (DRL) policies are vulnerable to unauthorized replication attacks, where an adversary exploits imitation learning to reproduce target policies from obse…
Hack The Box: Fooling Deep Learning Abstraction-Based Monitors
Sara Hajj Ibrahim, Mohamed Nassar
Deep learning is a type of machine learning that adapts a deep hierarchy of concepts. Deep learning classifiers link the most basic version of concepts at the input layer to the mo…
Torsional Regularization of Self-Energy and Bare Mass of Electron
Michael Del Grosso, Nikodem Popławski
In the presence of spacetime torsion, the momentum components do not commute; therefore, in quantum field theory, summation over the momentum eigenvalues will replace integration o…
Adversarial Poisoning Attacks and Defense for General Multi-Class Models Based On Synthetic Reduced Nearest Neighbors
Pooya Tavallali, Vahid Behzadan, Peyman Tavallali +1
State-of-the-art machine learning models are vulnerable to data poisoning attacks whose purpose is to undermine the integrity of the model. However, the current literature on data…
Adversarial Attacks on Deep Algorithmic Trading Policies
Yaser Faghan, Nancirose Piazza, Vahid Behzadan +1
Deep Reinforcement Learning (DRL) has become an appealing solution to algorithmic trading such as high frequency trading of stocks and cyptocurrencies. However, DRL have been shown…
Sentimental LIAR: Extended Corpus and Deep Learning Models for Fake Claim Classification
Bibek Upadhayay, Vahid Behzadan
The rampant integration of social media in our every day lives and culture has given rise to fast and easier access to the flow of information than ever in human history. However,…
Contact network changes in ordered and disordered disk packings
P. J. Tuckman, K. VanderWerf, Y. Yuan +4
We investigate the mechanical response of packings of purely repulsive, frictionless disks to quasistatic deformations. The deformations include simple shear strain at constant pac…
Gravitational collapse of a fluid with torsion into a universe in a black hole
Nikodem Popławski
We consider gravitational collapse of a spherically symmetric sphere of a fluid with spin and torsion into a black hole. We use the Tolman metric and the EinsteinCartan field eq…
A nonsingular, anisotropic universe in a black hole with torsion and particle production
Nikodem J. Popławski
We consider a universe formed in a black hole in general relativity with spin and torsion. The interior of a Schwarzschild black hole can be represented by the KantowskiSachs me…
Determination of the order of fractional derivative for subdiffusion equation
Ravshan Ashurov, Sabir Umarov
The identification of the right order of the equation in applied fractional modeling plays an important role. In this paper we consider an inverse problem for determining the order…