Centre de Recerca Matemàtica: Enviaments recents
Ara mostrant els elements 221-240 de 1369
Investigating the impact of adsorbent particle size on column adsorption kinetics through a mathematical model
Experimental data demonstrates that the breakthrough curves of column adsorption exhibit qualitative differences related to the size of the adsorbent particles. Standard models do not account for particle size, consequently, ...
Traces on ultrapowers of C*-algebras
Using Cuntz semigroup techniques, we characterize when limit traces are dense in the space of all traces on a free ultrapower of a C*-algebra. More generally, we consider density of limit quasitraces on ultraproducts of ...
Identifiability in robust estimation of tree structured models
Consider the problem of learning undirected graphical models on trees from corrupted data. Recently Katiyar, Shah, and Caramanis showed that it is possible to recover trees from noisy binary data up to a small equivalence ...
The second fundamental form on the moduli space of cubic threefolds in A5
We study the second fundamental form of the Siegel metric in A5 restricted to the locus of intermediate Jacobians of cubic threefolds. We prove that the image of this second fundamental form, which is known to be non-trivial, ...
On the optimal effective stability bounds for quasi-periodic tori of finitely differentiable and Gevrey Hamiltonians
It is known that a Diophantine quasi-periodic torus with frequency ω∈Ωτd of a Cl Hamiltonian is effectively stable for a time T(r) that is polynomial on the inverse of the distance to the torus, that we denote by r, with ...
Time-reversibility and integrability of p: −q resonant vector fields
We study the local analytical integrability in a neighborhood of p: −q resonant singular point of a two-dimensional vector field and its connection to time-reversibility with respect to the non-smooth involution ϕ(x, y) = ...
Competitive heavy metal adsorption on pinecone shells: Mathematical modelling of fixed-bed column and surface interaction insights
Pinecone shells are assessed as a cost-effective biosorbent for the removal of metal ions Pb(II), Cu(II), Cd(II), Ni(II), and Cr(VI) in a fixed-bed column. Influent concentration, bed height, and flowrate are studied to ...
Identifying regime shifts, transients and late warning signals for proactive ecosystem management
Conservation Biology fosters the study of Earth's ecosystems and biodiversity aiming at protecting species and their habitats from menaces causing the erosion of biotic interactions and extinctions. Its ultimate goal is ...
Some mechanisms leading to underdispersion: Old and new proposals
In statistical modeling, it is important to know the mechanisms that cause underdispersion. Several mechanisms that lead to underdispersed count distributions are revisited from new perspectives, and new ones are introduced. ...
Semiclassical quantification of some two degree of freedom potentials: A differential Galois approach
In this work we explain the relevance of the Differential Galois Theory in the semiclassical (or WKB) quantification of some two degree of freedom potentials. The key point is that the semiclassical path integral quantification ...
Allosteric binding cooperativity in a kinetic context
Allosteric modulators are of prime interest in drug discovery. These drugs regulate the binding and function of endogenous ligands, with some advantages over orthosteric ligands. A typical pharmacological parameter in ...
Short Synchronizing Words for Random Automata
We prove that a uniformly random automaton with n states on a 2-letter alphabet has a synchronizing word of length O(√n log n) with high probability (w.h.p.). That is to say, w.h.p. there exists a word ω of such length, ...
Corrigendum to “Multivariate subresultants in roots” [J. Algebra Appl. 302(1) (2006) 16–36, (S0021869305004679), (10.1016/j.jalgebra.2005.08.016)]
In this erratum we give the correct formulation of Corollary 2.7 in [1]. © 2023 Elsevier Inc.
A Three Dimensional Lagrangian Analysis of the Smoke Plume From the 2019/2020 Australian Wildfire Event
During the 2019/2020 Australian bushfire season, intense wildfires generated a rising plume with a record concentration of smoke in the lower stratosphere. Motivated by this event, we use the atmospheric wind reanalysis ...
Bohr-Sommerfeld quantization of b-symplectic toric manifolds
We introduce a Bohr-Sommerfeld quantization for b-symplectic toric manifolds and show that it coincides with the formal geometric quantization of [GMW18b]. In particular, we prove that its dimension is given by a signed ...
Influence of Red and Yellow cards on team performance in elite soccer
The aim of the current study is to analyze the effects of red and yellow cards on the scoring rate in elite soccer. The sample was composed of 1826 matches in the top five European leagues. All events were structured in ...
Eigenvalue Curves for Generalized MIT Bag Models
We study spectral properties of Dirac operators on bounded domains Ω ⊂ R3 with boundary conditions of electrostatic and Lorentz scalar type and which depend on a parameter τ∈ R; the case τ= 0 corresponds to the MIT bag ...
Evo-devo beyond development: Generalizing evo-devo to all levels of the phenotypic evolution
A foundational idea of evo-devo is that morphological variation is not isotropic, that is, it does not occur in all directions. Instead, some directions of morphological variation are more likely than others from DNA-level ...
Social copying drives a tipping point for nonlinear population collapse
We study spectral properties of Dirac operators on bounded domains Ω ⊂ R3 with boundary conditions of electrostatic and Lorentz scalar type and which depend on a parameter τ∈ R; the case τ= 0 corresponds to the MIT bag ...
Heegner points, stark-Heegner points, and diagonal classes
Stark-Heegner points are conjectural substitutes for Heegner points when the imaginary quadratic field of the theory of complex multiplication is replaced by a real quadratic field K. They are constructed analytically as ...
