University of Chile

Error Bounds for Physics Informed Neural Networks in Generalized KdV Equations Placed on Unbounded Domains

In this paper we study a rigorous setting for the numerical approximation via deep neural networks of the generalized Korteweg-de Vries (gKdV) model in one dimension, for subcritical and critical nonlinearities, and assuming that the domain is the unbounded real line. The fact th...

Antiproteinuric Response to Finerenone in Diabetic Kidney Disease: Responder and Non-Responder Subgroup Analysis of the FINDKDLATAM Study

Background/Objectives: Albuminuria is an early marker of kidney damage and an independent predictor of adverse outcomes, making its reduction a key therapeutic goal. Finerenone, a selective nonsteroidal mineralocorticoid receptor antagonist, has demonstrated renal and cardiovascu...

Dynamics of coupled nonlinear diffusion–reaction systems

We study two coupled nonlinear Fisher–Kolmogorov equations with anomalous diffusion. Because analytical solutions are difficult to obtain, we use a reduced collective-coordinate method based on two time-dependent power-law assumptions. This approach reduces the original partial d...

Target the Vulnerable? An Analysis of Rapid Rehousing Prioritization

We model the problem facing a policymaker who must allocate rapid rehousing support to people experiencing homelessness and wishes to minimize the steady-state social cost of homelessness. Support is often given to the most vulnerable applicants or to applicants most likely to re...

When is the bait worth the risk? A mechanistic model of a compensatory ecological trap in seabirds

Abstract Ecological traps occur when organisms preferentially select habitats that reduce fitness. In seabird–fishery systems, fishery‐derived trophic subsidies can increase foraging success, reinforce habitat preference and indirectly enhance reproductive output or recruitment,...

Cellular stress leading to epithelial cell dysfunction in Sjögren’s syndrome

Cells are highly compartmentalized entities composed of membranous and nonmembranous structures, where organelles such as the endoplasmic reticulum (ER), Golgi apparatus, nucleus, mitochondria, lysosomes, peroxisomes, endosomes, and plasma membrane are organized. The plasma membr...

Integrating Remote Sensing and Indigenous Knowledge: A Community-Commanded Approach to Heritage Management in the Atacama Desert

Abstract This article presents the Zapar project, a community-commanded initiative developed in collaboration with the Atacameño Community of Toconao (northern Chile), which repositions remote sensing (RS) technologies through Indigenous governance and ethical frameworks. By embe...

Late Holocene environmental dynamics and their influence on human occupation in the Santiago basin (33°S), Central Chile

Fluvial-alluvial deposits provide high-resolution records for reconstructing paleoenvironments and deciphering archaeological site-formation processes. Despite their prevalence in the Mediterranean-climate region of central Chile, a significant research gap persists in linking pr...

When the Workplace is a Home: A Dialogue on the Complexities of Power, Care, and Human Rights for Domestic Workers

This piece features a conversation about the complexities of negotiating power, care, and human rights for domestic workers in Argentina, Chile, and the United States. Issues discussed include questions of power and labor; challenges and complexities of living and working in some...

Attention-Based LSTM Forecasting of O3, NO2, and NO Concentrations in Eastern Santiago, Chile

In Santiago, Chile, the 8 h average atmospheric ozone (O3) concentration frequently exceeds the national air quality standard of 61 ppbv (parts per billion by volume). Due to local meteorological and topographic conditions, the highest ozone levels are observed at the Las Condes...

Beyond Demographics: Incorporating Relational Values and Disvalues into Socio-Environmental Profiles of Landowners Adjacent to Cerro Castillo National Park, Chilean Patagonia

Land-use change is the primary direct driver of terrestrial biodiversity loss. Around Cerro Castillo National Park (PNCC) in Chilean Patagonia, rural land subdivision increased by 400% between 2011 and 2023, generating ecological, economic, and social pressures on the park and su...

Modeling and numerical simulation of premixed combustion using the k−ɛ turbulence model

Combustion is a chemical process through which the chemical energy is converted into heat via exothermic reactions. Understanding and optimizing combustion phenomena is crucial for efficient energy conversion across a wide range of engineering applications. In recent decades, CFD...

Resonance-Assisted Depinning of DMI-Stabilized Néel Domain Walls in Stepped Perpendicular Magnetic Nanowires Driven by Pulsed Currents

Current-driven manipulation of magnetic domain walls (DWs) in perpendicularly magnetized nanowires is promising for spintronic memory and logic applications. In this work, micromagnetic simulations are used to investigate the depinning of DMI-stabilized Néel domain walls from a s...

About a Ball Removal Process on Bins

We consider a basic balls-and-bins question in which you have to distribute n balls into k bins. Then, round by round, a ball is removed from a nonempty bin chosen uniformly at random. The process ends when a single nonempty bin remains. The goal is to minimize the expected numbe...

Transient cartilages and interdigital vasculature organization in the embryonic duck foot

Abstract The evolution of webbed limbs represents a recurrent adaptation to aquatic life in tetrapods, facilitated by the dynamics of embryonic digit development. Digits form at the distal tip of the limb bud as cartilage condensations surrounded by mesenchymal cells, a process d...

Two‐Block Paths in Oriented Graphs of Large Semidegree

ABSTRACT We study the existence of oriented paths with two blocks in oriented graphs under semidegree conditions. A block of an oriented path is a maximal directed subpath. Given positive integers and with , we establish a semidegree function that guarantees the containment of ev...

Dietary Fiber Supplementation Reduces Systolic Blood Pressure in High-Risk Patients with Type 2 Diabetes and Hypertension: A Secondary Analysis of a Randomized Trial

Background/Objectives: Dietary fiber supplementation has been associated with blood pressure (BP) reduction, but evidence comparing soluble (SDF) and insoluble (IDF) fiber types in high-risk populations is limited. This study aimed to compare the effects of SDF and IDF supplement...

Evaluating the Sustainability and Adaptability of the Maipo-Mapocho Aquifer under Climate Change Projections

Abstract Ensuring water security under increasing population pressure, agricultural expansion, and climate change remains a major global challenge. Groundwater plays a critical role, supplying more than half of global drinking water and supporting irrigation, yet it is increasing...

Properties and Proximal Point Type Methods for Strongly Quasiconvex Functions in Hilbert Spaces

We study strongly quasiconvex functions defined on Hilbert spaces and taking extended real values from both theoretical and algorithmic points of view. To this end, we verify the existence of (global) minimizers and the properties of the proximal operator for such functions, prev...

Training-transfer validation of a portable VR laparoscopic simulator: 6-DoF kinematic assessment on a common physical reference task

Portable consumer-headset virtual reality (VR) simulators can broaden access to instrumented surgical training, but their value depends on whether skills acquired in VR transfer beyond the immersive environment. We evaluated SECMA, a portable VR laparoscopic simulator, against co...