Blogue
Topological model selection: a case-study in tumour-induced angiogenesis
Comparing mathematical models offers a means to evaluate competing scientific theories. Cependant, exact methods of model calibration are not applicable to many probabilistic models which simulate high-dimensional spatio-temporal data. Approximate Bayesian Computation is a widely-used method for parameter inference and model selection...
Valkyrie: A Response Framework to Augment Runtime Detection of Time-Progressive Attacks
A popular approach to detect cyberattacks is to monitor systems in real-time to identify malicious activities as they occur. While these solutions aim to detect threats early, minimizing damage, they suffer from a significant challenge due to the presence of false positives....
Real-Time Sentiment Insights from X Using VADER, DistilBERT, and Web-Scraped Data
In the age of social media, understanding public sentiment toward major corporations is crucial for investors, policymakers, and researchers. This paper presents a comprehensive sentiment analysis system tailored for corporate reputation monitoring, combining Natural Language Processing (NLP) and machine learning techniques to...
Tracing Cross-chain Transactions between EVM-based Blockchains: An Analysis of Ethereum-Polygon Bridges
Ethereum’s scalability has been a major concern due to its limited transaction throughput and high fees. To address these limitations, Polygon has emerged as a sidechain solution that facilitates asset transfers between Ethereum and Polygon, thereby improving scalability and reducing costs. Cependant,...
Nernst power factor and figure of merit in compensated semimetal ScSb
Recently, topological semimetals have emerged as strong candidates for solid state thermomagnetic refrigerators due to their enhanced Nernst effect. This enhancement arises from the combined contributions of the Berry curvature induced anomalous Nernst coefficient associated with topological bands and the normal Nernst...
The Dirac operator for the Ruelle-Koopman pair on L^p-spaces: an interplay between Connes distance and symbolic dynamics
Denote by $\bm{\mu}$ the maximal entropy measure for the shift \(\sigma\) acting on $\Omega = \{0, 1\}^\mathbb{N}$, by $\ruelle$ the associated Ruelle operator and by $\koopman = \ruelle^{\dagger}$ the Koopman operator, both acting on $\lp{2}(\bm{\mu})$. Using a diagonal representation $\pi$, the Ruelle-Koopman...
Applied Antifragility in Natural Systems: Evolutionary Antifragility
This chapter introduces evolutionary antifragility as the time-scale interaction characteristics of a natural dynamic system. It describes the benefit derived from input distribution unevenness, based on the emergent system dynamics and its uncertain and volatile interactions with the operating environment described by...
The case of the missing gallium vacancy in gallium arsenide: A multiscale explanation
Irradiation of gallium arsenide (GaAs) produces immobile vacancies and mobile interstitials. Cependant, after decades of experimental investigation, the immobile Ga vacancy eludes observation, raising the question: Where is the Ga vacancy? Static first-principles calculations predict a Ga vacancy should be readily observed....
Birational properties of word varieties
We prove that the subvariety of $SL(2)\times SL(2)$ given by the matrix equation $w(X,Y)=\alpha$, where $w$ is a word in two letters, is closely related to an explicit smooth conic bundle over the associated `trace surface’ in the 3-dimensional affine space. When...
Ultra-sensitive radon assay using an electrostatic chamber in a recirculating system
Rare event searches such as neutrinoless double beta decay and Weakly Interacting Massive Particle detection require ultra-low background detectors. Radon contamination is a significant challenge for these experiments, which employ highly sensitive radon assay techniques to identify and select low-emission materials. This...