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Influence of physicochemical variables on polymer adsorption in porous media

Abstract: HPAM type polymers and modifications with ATBS (Acrylamide Tertiary Butyl Sulfonated) units are used for EOR processes. Polymer adsorption is key to the success of these processes and is affected by variables such as molecular weight, hydrolysis, salinity, an

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Biotechnological methods for pulping copoazú (Theobroma grandiflorum (Wild. ex Spring) Schum) seed and their influence on the fermentation stage

Abstract: Copoazú is a fruit originated from Colombian Amazon belonging to Theobroma genus, which includes species such as cacao raw material for chocolate. Both species presented similar processing stages, with different process parameters due to the physical qualitie

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Mitigation of chilling injury in sweet potato roots subjected to low-temperature conditioning

Abstract: In many plant tissues, low-temperature conditioning (LTC) has been used to induce postharvest adaptive responses to overcome chilling injury (CI) consequences. This study aimed to investigate whether LTC is effective in reducing the incidence of chilling inju

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Rainfall profiles and sisal productivity for Bahia mesoregions, Brazil

Abstract: Sisal is widely produced in the semi-arid region of Bahia State, Brazil, and an important source of economic income for rainfed agriculture. Thus, the objective of the study was to analyze and classify the historical series of rainfall in relation to its prof

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Optimization of urban land-cover classification workflow based on geographic-object analysis using very-high-resolution imagery

Abstract: A recurring problem in Geographic-Object Based Image Analysis (GEOBIA) is the need to tune each one of the three phases involved in the process, segmentation, feature selection, and classification. This paper presents the optimization of a GEOBIA-based urban

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Numerical model for predicting and evaluating sand production in weakly consolidated reservoirs

Abstract: Sand production is a common phenomenon in oil and gas reservoirs, which occurs when reservoir fluids exert a sufficient drag force on reservoir rocks to erode the matrix. Numerical models for sand production have been used to understand the sanding mechanisms

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Performance control of root piles using a digital odometer

Abstract: Root piles are injected and installed during mortar shaft construction, using pressures of up to 500 kPa. The executive control is typically done through static load testing, an expensive and time-consuming method. Static load tests on eight controlled piles

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Comparison of mobile QoE: an unsupervised field study in Argentina and Cuba
Antonio Collazo-García Sandra Casas

Abstract: This article presents the findings of an unsupervised field study conducted over 31 days in Argentina and Cuba in order to explore mobile QoE. We also analyzed the correspondence between the objective observations and users' opinions to identify contextual co

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Roadmap for the implementation of robotic process automation in enterprises

Abstract: This research formulates significant steps to allow organizations to perform digital transformation using Robotic Process Automation - RPA. This study proposes a roadmap obtained from conclusions of experimental exercises in Colombian industries. It clarifies

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Determination of some quality characteristics of new primary cuts of the forequarter of Colombian bovine carcasses

Abstract: Meat quality must be considered from a nutritional, sanitary and sensory perspective. In order to characterize bovine meat (three, four and five-stars), from the Urabá region (Antioquia), the bromatological, textural and industrial quality of seven new primar

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Study of excavated clays with kaolinite and dickite as pozzolanic materials

Abstract: In the present study, samples of excavated waste clays were thermally activated at 550 °C and 650 °C, these clays with low kaolinite content and presence of dickite have a limited industrial exploitation but are widely availability in developing countries and

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Spatio-temporal prediction of water production in basins without records

Abstract: This study carried out the spatio-temporal prediction of water production in two micro-basins without records, located in Venezuela. Geomorphological characteristics of micro-basins were obtained using digital elevation models acquired from ALOS PALSAR satell

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Influence of zinc coating on nugget development and mechanical properties in dissimilar welded joints DP600 - AISI304 obtained by the RSW process

Abstract: This paper studies the influence of zinc coating of galvanized DP600 steel (DP600G) on nugget development and on the mechanical properties of dissimilar DP600 - AISI304 welded joints obtained by resistance spot welding process (RSW). RSW evaluations consisted

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Application of the experimental design for the analysis of nonattendance to scheduled medical appointments in the Colombian Health System

Abstract: This paper shows a study about nonattendance to medical appointments in the Colombian health system to determine which strategies have the greatest effect on the response variable (nonattendance) of scheduled medical appointments. Three factors were considere

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Management of safety rules and occupational risks: a systematic review from 2011 - 2021

Abstract: For an organization to be able to successfully maintain its operating processes and ensure the welfare of its workers, it is necessary to maintain an integrated system against occupational risks. This research aims to learn about scientific studies on occupat

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Ambient seismic noise in Cuba: analysis of broadband seismic stations in the Cuban Seismic Network

Abstract: This paper analyses seismic noise from broadband seismic stations within the Cuban National Seismic Service, focusing on location sites, soil or rock quality at installation sites and the impact of various factors on the noise signature of these seismic stati

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Aerodynamic shape optimization of a vertical-axis wind turbine with effect number of blades

Abstract: Our research consists of the experimental study of the vertical wind turbine of form H. The study represents the effect of the number of blades in the variation of the number of rotations of the vertical wind turbine, the speed ratio, torque, the power of the

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Microencapsulation of aroma compounds produced by Pichia fermentans

Abstract: Aroma and fragrance compounds have broad applications in the food, cosmetic and pharmaceutical industries. However, these compounds are mainly produced by chemical synthesis. An alternative, sustainable and promising route for the natural production of flavou

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Chemical comparison of the essential oils of Lippia Origanoides in two agroclimatic zones of the Colombian Caribbean coast

Abstract: The objective of this research is to compare the chemical profiles of the essential oils of Lippia origanoides leaves collected in Santa Marta and Sincelejo at different hours. The leaves were harvested at 6:00 a.m., 12:00 p.m., and 6:00 p.m., the essential o

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Performance evaluation of a Time Scale Controller
José Danilo Rairán-Antolines

Abstract: Regardless of the advances in intelligent control the analysis and use of the human capacity to control are far from exhausted. For instance, industrial applications could be too fast or too slow for a human to control. The proposed solution in this paper sta

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Improvement of competitiveness through the application of analytic hierarchy process, game theory, decision trees and design of experiments tools

Abstract: Competitiveness is important for all companies. Because qualitative and quantitative factors are associated with it, strategic decisions must be supported by different analytical tools. In this work, we describe the application of specific tools to improve th

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Environmental impact assessment in the San Luis de Alba rock quarry, Puno, Perú

Abstract: The Environmental Impact Assessment is a preventive tool that allows harmonizing the economic, social and environmental development promoted by the execution of projects. The objective of this research was to evaluate the significance of the environmental imp

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Potential impacts by residual HPAM from a polymer injection process on the behavior of production fluids

Abstract: The physicochemical characteristics of production fluids derived from chemical recovery processes (crude-water emulsions) can be altered due to the presence of residual polymer, which can generate operational problems in lifting systems or surface facilities.

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The role of urban green areas in noise pollution attenuation

Abstract: This study aimed to evaluate the relationship between the biophysical characteristics of green areas with the reduction of noise propagation. The study was conducted in two green areas located in the city of Curitiba, Paraná, Brazil. Noise pollution levels al

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