Browsing by Title
Now showing items 61-80 of 2951
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A review study of application of artificial intelligence in construction management and composite beams
(2021-06)This paper is aimed to review the use of artificial intelligence (AI) algorithms in diverse civil engineering applications such as predicting and evaluating the different parameters of composite beams and shear connectors ... -
A scientometric systematic review of entrepreneurial wellbeing knowledge production
(2021-03)This article presents a scientometric study regarding entrepreneurship and its relationship with wellbeing. The study presents a systematic review and measures impact and relational character to identify the relevance of ... -
A search for transit timing variations in the HATS-18 planetary system
(2022)HATS-18 b is a transiting planet with a large mass and a short orbital period, and is one of the best candidates for the detection of orbital decay induced by tidal effects. We present e xtensiv e photometry of HATS-18 ... -
A Second Planet Transiting LTT 1445A and a Determination of the Masses of Both Worlds
(2022)LTT 1445 is a hierarchical triple M-dwarf star system located at a distance of 6.86 pc. The primary star LTT 1445A (0.257 Me) is known to host the transiting planet LTT 1445Ab with an orbital period of 5.36 days, making ... -
A simple time-varying sensitivity analysis (TVSA) for assessment of temporal variability of hydrological processes
(2020-09)Time-varying sensitivity analysis (TVSA) allows sensitivity in a moving window to be estimated and the time periods in which the specific components of a model can affect its performance to be identified. However, one of ... -
A small contribution to mitigate the collision of transmissible and chronic diseases, exemplified by the management of hypertension during the COVID-19 pandemic
(2021-05)We want to take up the challenge posed by Nadar and cols. in their May editorial about managing hypertension during the COVID-19 pandemic [1]. Their concern that patients with chronic illnesses would be forgotten in the ... -
A source of isotopically light organic carbon in a low-pH anoxic marine zone
(2021)Geochemical and stable isotope measurements in the anoxic marine zone (AMZ) off northern Chile during periods of contrasting oceanographic conditions indicate that microbial processes mediating sulfur and nitrogen cycling ... -
A stabilised finite element method for the convection–diffusion–reaction equation in mixed form
(2018-09)This paper is devoted to the approximation of the convection–diffusion–reaction equation using a mixed, first-order, formulation. We propose, and analyse, a stabilised finite element method that allows equal order ... -
A stabilized mixed method applied to Stokes system with nonhomogeneous source terms: The stationary case Dedicated to Prof. R. Rodríguez, on the occasion of his 65th birthday
(2020-06)This article is concerned with the Stokes system with nonhomogeneous source terms and nonhomogeneous Dirichlet boundary condition. First, we reformulate the problem in its dual mixed form, and then, we study its corresponding ... -
A theoretical quantum study of the electronic properties of mentoxy dichloro phosphorous (C10H19OPCl2)
(2018-03)A theoretical quantum study of the organophosphorus compound with formula C10H19OPCl2 (MEPCL2) was carried out. The results of the calculations show excellent agreement between experimental and computed frequencies evaluated ... -
A trophic characterization of intertidal consumers on Chilean rocky shores
(2013)In the last 50 years, the trophic role of consumers has become a main research topic in the ecology of Chilean rocky shores, and in other regions. Several studies have typified species of echinoderms, crustaceans and ... -
A wavelet-based stabilization of the mixed finite element method with Lagrange multipliers
(2006)We present a new stabilized mixed finite element method for second order elliptic equations in divergence form with Neumann boundary conditions. The approach introduces first the trace of the solution on the boundary as a ... -
A-priori and a-posteriori error analysis of a wavelet-base d stabilization for the mixed finite element method
(2007)We use Galerkin least-squares terms and biorthogonal wavelet bases to develop a new stabilized dual -mixed finite element method for second order el liptic equations in divergence form with Neumann boundary conditions. The ... -
AB initio theoretical study of the HO + CO → CO 2 + H environmental chemical reaction
(2013)Atmospheric temperature affects both the absorption spectrum and the concentration of atmospheric gases. Gases with larger abundances and stronger absorption band intensities in the infrared region have a greater influence ... -
Abordaje de la Sexualidad en la Adolescencia que realizan las Familias de Jóvenes con Trastorno del Espectro Autista, pertenecientes a la Agrupación AGANAT de Talcahuano
(2022)La finalidad de esta investigación es comprender cómo se aborda la temática de sexualidad en jóvenes con Trastorno del Espectro Autista, para ello se busca conocer cómo las familias, participantes de la Agrupación de ... -
Absolute calibration of diffuse radio surveys at 45 and 150 MHz
(2021-02)We use measurements from the Experiment to Detect the Global EoR Signature (EDGES) to determine scale and zero-level corrections to the diffuse radio surveys by Guzmán et al. at 45 MHz and by Landecker & Wielebinski at 150 ... -
Abundance, distribution and feeding patterns of a temperate reef fish in subtidal environments of the Chilean coast: the importance of understory algal turf
(2002)Cheilodactylus variegatus is an abundant carnivorous demersal reef fish that lives in the shallow subtidal of the north-central Chilean coast. Characteristically, these environments are dominated by kelp forests of Lessonia ... -
Abundancia y distribución de ceras de hojas en Tillandsia landbeckii Phil. del Desierto de Atacama, Chile
(2022)En el desierto hiperárido de Atacama, la disponibilidad de agua juega un papel crucial para permitir la supervivencia de las plantas. Junto con las escasas precipitaciones, la niebla marina ocurre con frecuencia a lo largo ... -
Accelerometry underestimates energy expenditure in circuit-based resistance training
(2020-09)Accelerometry is a very accurate method for determining energy expenditure (EE) in endurance training. However, further studies are needed to prove its accuracy in resistance training. To compare the EE obtained by ... -
Acciones de adecuación para la evaluación de los aprendizajes, en estudiantes con necesidades educativas especiales de la Comuna de Concepción, y su coherencia con la normativa vigente
(2017-08)El objetivo de esta investigación es describir las acciones de evaluación de los aprendizajes para los estudiantes con necesidades educativas especiales, realizadas por profesores de aula regular y de educación diferencial, ...