University of Tarapacá

Breaking ground, beyond the floor assumption: An experimental approach to seaweed ash-cemented deposits in the Atacama Desert coast

On the Atacama Desert coast, a unique type of ash-cemented deposit has been reported in architectural stone-built structures from the Late Archaic Period (ca. 5500–4000 BP). Functional approaches traditionally infer these layers as domestic constructed floors that also served to...

Interfacial engineering of sulfur-modified g-C3N5/V2O5 heterostructures for enhanced overall water splitting and sonophotocatalytic tetracycline degradation

Electrochemical water splitting (EWS) and photocatalytic advanced oxidation processes (AOPs) are promising approaches for clean hydrogen production and environmental remediation; however, their efficiency is often limited by high overpotentials, rapid charge recombination, and po...

Zinc nutrition among ancient Andeans in Northern Chile: determination of hair zinc concentrations using LA-ICP-MS

Zinc (Zn) is an essential trace metal in the human body, a critical structural and functional component of many proteins, and it regulates enzyme catalytic activity. Very little information is available about Zn nutrition among ancient Andeans in Northern Chile. This study report...

Square‐Shaping of Sturdy Optical Vortex Droplets in Quasi‐Phase‐Matched Photonic Crystals

ABSTRACT We elaborate a scheme for controllable shaping of self‐trapped vortex states in a quasi‐phase‐matched three‐dimensional photonic crystal with the combination of self‐focusing quadratic and defocusing cubic material nonlinearities. The setting gives rise to sturdy droplet...

Hydrogel‐Based Mechano‐Immunomodulation in Bone Fracture Healing: Mechanical Regulation of Macrophage Phenotypes, Osteoimmune Interactions, and Regeneration

Bone fracture healing is a meticulously regulated process encompassing the inflammatory, reparative, and remodelling phases. Macrophages serve as pivotal coordinators within this cascade, with their polarisation from pro-inflammatory M1 to proregenerative M2 phenotypes, which pla...

Gas absorption of soft X-rays strongly impacts the redshift distribution of dark Fast X-ray Transients

Abstract The progenitors of many Fast X-ray Transients (FXTs) and those of γ-ray bursts (GRBs) are strongly linked. Given that ”dark” GRBs are typically found to be events suffering from enhanced extinction in the host galaxy, we investigate the nature of ”dark” FXTs. However, un...

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...

Algebraically decaying solutions for magnetohydrodynamic heat and mass transfer in Newtonian flow driven by stretching or shrinking surface: applications to thermal management and cooling technologies

The aim of the current analyses is to examine the thermal and solutal transfer impact on Newtonian fluid flow across permeable expanding/shrinking surfaces, and the impact of solar radiation, magnetic field, and Schmidt number on fluid flow has been extracted. Governing Navier-St...

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...

Thermophysical properties, combustion, performance, and emission analysis of ZnO, TiO₂, and GNP-enhanced WCOME–diesel–DGM triple fuel blends in a CRDI diesel engine

The continuous utilization of non-renewable/conventional fuels for different fields of applications creates intense demand, increasing costs, and hazardous exhaust gases, which cause depletion of these products from the Earth’s source. This scenario urges researchers to find alte...

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...

Fragmentos para una biografía de la Estela 6 de Aguateca: desde Guatemala hasta el Museo Chileno de Arte Precolombino

Resumen Se presentan fragmentos de la biografía de la Estela 6 de Aguateca depositada desde hace casi 45 años en el Museo Chileno de Arte Precolombino, ubicado a 6.000 km de su lugar de origen en la selva de Guatemala. La investigación sintetiza la historia de la estela desde su...

Three-dimensional optical vortices in nonlinear bessel waveguides

Abstract We explore the formation, stability, and propagation dynamics of light bullets carrying orbital angular momentum (vorticity) in Bessel-structured nonlinear graded-index waveguides. While these waves are prone to the collapse in uniform three-dimensional media, we demonst...

Quantum‐Mechanical Wave Functions in Singular Potentials: Linear and Nonlinear States

ABSTRACT It is known that the attractive singular potential gives rise to the quantum collapse in the framework of the three‐dimensional (3D) linear Schrödinger equation. This article summarizes theoretical results which demonstrate suppression of the collapse caused by this sing...

The chromomagnetic moment of a heavy quark with hyperasymptotic precision

A bstract We determine the normalization of the leading infrared renormalon of the chromomagnetic moment of a heavy quark. Estimates of higher order coefficients of the perturbative series are given. We compute the hyperfine splitting of the B and D mesons for the ground state wi...

On gravitational collapse and integrable singularities

Abstract Schwarzschild black holes are expected to emerge as the end states of the classical gravitational collapse from non-singular configurations. After integrable curvature singularities appear, the interior geometry can be modelled to exhibit a transition, called “Minkowski...

Plyometric-jump training with versus without unstable load to improve physical fitness in trained young volleyball players: a randomized controlled trial

Abstract Background Plyometric-jump training (PJT) has been recommended as an effective resistance training modality for enhancing vertical jump and lower limb muscle power in young athletes. While unstable surfaces are popular means to address progression and specificity, an alt...

Tracking the baryon number with nuclear collisions

Baryon quantum number is found to be conserved since baryogenesis in the early Universe. Conventionally, each fractionally charged valence quark is understood to carry one-third of a baryon number. An alternative hypothesis posits that baryon number is instead carried by a baryon...

Mitogenome-Informed Metabarcoding for Non-Invasive Identification of Sympatric Flamingos in Northern Chile

The Chilean flamingo (Phoenicopterus chilensis) is a widely distributed South American species inhabiting diverse wetland ecosystems from Ecuador and Peru south to Chile and Argentina, and east to Brazil, Uruguay, and Paraguay, ranging from sea level to high-altitude Andean salar...