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Tordesilhas
No full textEn 1494, hace 530 años, el Reino de Portugal y la Corona de Castilla firmaron un tratado que dividía las tierras “descubiertas y no descubiertas”. En el apogeo de una edad de oro, los imperios ibéricos dividieron el mundo, dejando el destino de sus decisiones a los pueblos que posteriormente colonizaron. ¿Cómo podemos hoy dialogar sobre esto? ¿Cuáles son las consecuencias de estas decisiones tomadas por nuestros antepasados? “Tordesilhas” es un proyecto de creación teatral entre tres países (Portugal, Brasil y Chile) que pretende provocar un diálogo transcultural sobre nuestras diferencias y similitudes para comprender, desde la actualidad, cómo estas determinaciones históricas sobre nuestros territorios y fronteras generaron lo que hoy somos: nuestros fallos, nuestras crisis, nuestras expectativas y miserias. Equipo artísticoConcepción, Dirección y Dramaturgia: Tercer Abstracto (Chile - Brasil) y Silly Season (Portugal)Creadores y Performance:Cátia Tomé (PT), David Atencio (CL), Eduardo Vásquez (CL), Emilie Becker (BR), Ivo Saraiva e Silva (PT), Mateus Fávero (BR), Ricardo Teixeira (PT)Composición musical: Emilie Becker (BR)Iluminación Nicolás Russi (CL)Escenografía: José Miguel CarreraProducción Artística: Bárbara Donoso (CL)Producción Ejecutiva: Ariane Cuminale - Corpo Rastreado (BR), Ruana Carolina (PT-BR)Apoyadores: Polo Cultural das Gaivotas (PT), Festival Temps d’Images (PT), Teatro UC (CL)Financiamiento: Programa IBERESCENA 2023-2024 (Apoyo a la coproducción de Espectáculos de Artes Escénicas), Direção Geral das Artes DGA (Portugal), Estructura del Núcleo SillySeason, Fondart 2022 Circulación Internacional (Chile) Proyecto “Residencia Tercer Abstracto en Lisboa” (123), IPRE - Pontificia Universidad Católica de Chile Programa de Pasantías de Investigación de PregradoIberescena. EspañaFondart. ChileDGA Direção Geral das Artes. Portuga
Model-based workflow for sustainable production of high-quality spirits in packed column stills
No full textThis study addresses water scarcity in Chilean distilleries by developing a model-based engineering workflow. Prolonged droughts, likely driven by global warming, have intensified this problem. The primary challenge is maintaining high-quality spirits while reducing cooling water and energy use during batch distillation in packed columns. This process was modeled using mass and energy balances, resulting in a system of partial differential algebraic equations (PDAE). Our workflow includes mechanistic modeling, disturbance modeling, multiobjective optimization, model predictive control, and Monte Carlo simulations. Our findings show that cooling water consumption can be reduced by up to 35 % and energy consumption by up to 14.4 % while maintaining product quality. The proposed system is robust against operational disturbances and model mismatch, ensuring consistent distillate quality. This research demonstrates the integration of model-based optimization and control strategies in batch distillation processes, which can be replicated in other fruit wine distillation processes for improved sustainability
Two point boundary value problems for ordinary differential systems with generalized variable exponents operators
No full textIn recent years an increasing interest in more general operators generated by Musielak-Orlicz functions is under development since they provided, in principle, a unified treatment deal with ordinary and partial differential equations with operators containing the p-Laplace operator, the phi-Laplace operator, operators with variable exponents and the double phase operators. These kind of consideration lead us in Garcia-Huidobro et al. (2024), to consider problems containing the operator (S(t, u ')) where ' = d/dt and look for period solutions systems of nonlinear systems of differential equations. In this paper we extend our approach to deal with systems of differential equations containing the operator (S(t, u ')) this time under Dirichlet, mixed and Neumann boundary conditions. As in Garcia-Huidobro et al. (2024) our approach is to work in C-1 spaces to obtain suitable abstract fixed points theorems from which several applications are obtained, including problems of Lienard and Hartman type
Impact of homolactic fermentation using Lactobacillus acidophilus on plant-based protein hydrolysis in quinoa and chickpea flour blended beverages
No full textIn this study, three beverages formulated with quinoa and chickpea flour blends were fermented using Lactobacillus acidophilus LA-5 to assess the effect of lactic acid fermentation on the degree of hydrolysis of plant-based proteins. Additionally, the impact of quinoa and chickpea blends on the protein content and protein solubility in the beverages was evaluated. Fermentation was completed within 10 h, resulting in a decrease in the pH (0.37 % and > 1.7 g/L), respectively. SDS-PAGE and the Ophthalaldehyde method revealed hydrolysis of quinoa and chickpea proteins. A quinoa-to-chickpea ratio of 50 % exhibited the highest protein content (>2 %), solubility (43.6 %), and hydrolysis (35.9 %) after fermentation, indicating that an increase in chickpea improved these parameters in the prepared PBBs. Overall, fermentation using Lactobacillus acidophilus increased plant protein hydrolysis, and legume addition improved the protein content and the nutritional value of plant-based beverages
In-depth Investigation of a Type II Cepheid in a Binary System
No full textTesis (Master’s degree in Astrophysics)--Pontificia Universidad Católica de Chile, 2025Type II Cepheids are old, low-mass variable stars that are essential for mapping old stellar populations, thanks to their greater brightness compared to RR Lyrae. They play a key role in calibrating cosmic distances. OGLE-GD-T2CEP-0178, a type II Cepheid located in the Galactic disk, is part of an eclipsing binary system, which allows its mass to be directly measured and to study its evolutionary status.The main goal of this thesis was to determine the masses of OGLE-GD-T2CEP-0178 and its companion and to characterize the binary system. Spectroscopic data obtained with HARPS and photometric data from six surveys in different bands were used. Through light and radial velocity curves modeling with PHOEBE, the physical parameters of each component and the key orbital parameters of the system were derived.The results reveal that the binary system (P_orb=81.72 days) is composed of a type II Cepheid with a pulsation period of P_puls=3.833 days, a mass of M_ cep=1.16 +- 0.09 Msun and a radius of R_cep=14.12 +- 1.73 Rsun, along with a more massive companion of M_ comp=5.5 +- 0.3 Msun. The system also has a disk with a radius of R_disk=174 +- 42 Rsun. The complexity of the system suggests that some companion parameters could be underestimated.These results support the hypothesis that the current Cepheid underwent a past mass transfer event during which it lost part of its hydrogen envelope. As a consequence, the Cepheid's pulsation properties may have been affected. To confirm this scenario, a detailed binary evolution analysis must be performed to understand how mass transfer shaped the system's current configuration.ANID/FONDECYT; Folios: 1171273, 1231637ANID’s Millennium Science Initiative; Folio: ICN12_009, AIM23-0001ANID Basal project; Folio: FB21000
Global perspectives, local solutions: Improving human–predator coexistence through collaboration, meaningful experiences and cross‐cultural knowledge
No full textHuman–predator coexistence is a complex and dynamic relationship influenced by a variety of social–ecological factors.Recognising conflict as an inherent aspect of coexistence, rather than merely a problem to be solved, is crucial.This literature review examines how a range of factors contributes to human coexistence with predators.A systematic review of 76 peer-reviewed articles from 33 countries provides valuable insights into the complexities associated with these factors across different contexts.Collaboration among social actors is crucial for addressing cultural tensions, increasing trust in state agencies and reaching agreements for coexistence practices.While material benefits (e.g. ecotourism, financial compensation) are often emphasised, relational and intrinsic values, emotions and meaningful personal experiences play an even greater role in fostering coexistence.Acknowledgment of positive predator attributes, mutual benefits, cultural significance and deep human–wildlife connections may help shape perceptions of predators in a culturally informed manner.Further appropriate and respectful cross-cultural research that amplifies Indigenous voices and knowledge is essential for understanding the nuances of human–predator interactions across diverse socio-economic and ecological contexts.Comprehensive management to improve human–predator relationships needs to consider ecological contexts alongside the cultural norms and priorities of local communities. This approach will enable legitimate, situated and long-term coexistence practices and solution
Granulometric characterization of the alluvial-colluvial deposits in microbasins of the Copiapó river –Atacama region (Chile)
No full textThis study aims to characterize the grain size distribution of sediments in alluvial-colluvial deposits within the Copiapó River basin, Chile, toprovide detailed information on their composition and enhance the understanding of debris flow behavior. Debris flows are mass-wasting events triggered by intense and localized rainfall, commonly occurring in the arid zones of the Coastal Range and theAndes. These flows are defined by their high density and a composition largely made up of gravel mixed with water, giving them non-Newtonian and viscoplastic fluid properties that enable the transport of large volumes of material. Grain size analysis revealed that the studied microcatchments contain sediments with low cohesion and high susceptibility to erosion, predominantly composed of angular and non-cohesive gravel and sand particles. These characteristics facilitate the initiation and mobilization of debris flows on steepslopes, which is typical of arid regions with high erosive energy. This research contributesto clarifying the relationship between sediment composition and debris flow dynamics, offering key granulometric data for the characterization of materials transported during mass movement events
My job is to write about Chile”. The writer-consul Gabriela Mistral in chilean public diplomacy, 1932-1957
No full textEl artículo estudia el rol de propagandista de Chile que tuvo Gabriela Mistral desde su cargo consular entre 1932 y 1957, y lo inserta dentro de la incipiente diplomacia pública y cul-tural del país. Entendiendo a Mistral como un «agente intermedio» de la propaganda exterior, se observa su relación con el Ministerio de Relaciones Exteriores a partir de diversos aspectos: el ni-vel de iniciativa personal de Mistral en temas de propaganda cultural, su labor transfiriendo conoci-mientos sobre diplomacia cultural a sus superiores, y el margen de autonomía con el que se desem-peñó. De este modo, se da a conocer tanto la labor individual de la poeta como el funcionamiento institucional de la propaganda exterior. Su caso sugiere que la diplomacia pública que desarrollaba el Ministerio de Relaciones Exteriores estaba poco centralizada y fue impulsada en gran parte por los representantes de Chile en el exterio
Use of Abandoned Copper Tailings as a Precursor to the Synthesis of Fly-Ash-Based Alkali Activated Materials
No full textThis study evaluated the feasibility of reusing abandoned copper mine tailings (Cu tailings) as a precursor in the production of fly-ash-based alkali-activated materials (FA-AAMs). Two formulations were developed by combining FA and Cu tailings with a mixture of sodium silicate and sodium hydroxide as alkaline activators at room temperature (20 °C). Formulation G1 consisted of 70% Cu tailings and 30% fly ash (FA), whereas G2 included the same composition with an additional 15% ordinary Portland cement (OPC). The materials were characterized using X-ray fluorescence (XRF), -X-ray diffraction (XRD), field emission scanning electron microscopy with energy-dispersive spectroscopy (FESEM-EDS), and particle size analysis. While FA exhibited a high amorphous content (64.4%), Cu tailings were largely crystalline and acted as inert fillers. After 120 days of curing, average compressive strength reached 24 MPa for G1 and 41 MPa for G2, with the latter showing improved performance due to synergistic effects of geopolymerization and OPC hydration. Porosity measurements revealed a denser microstructure in G2 (35%) compared to G1 (52%). Leaching tests confirmed the immobilization of hazardous elements, with arsenic concentrations decreasing over time and remaining below regulatory limits. Despite extended setting times (24 h for G1 and 18 h for G2) and the appearance of surface efflorescence, both systems demonstrated good chemical stability and long-term performance. The results support the use of Cu tailings in FA-AAMs as a sustainable strategy for waste valorization, enabling their application in non-structural and moderate-load-bearing construction components or waste encapsulation units. This approach contributes to circular economy goals while reducing the environmental footprint associated with traditional cementitious systems