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Potential synergy between natural gas production and offshore wind power generation: a case study in northeast Brazil

Abstract: Offshore wind energy production is non-existent in Brazil, although is currently considered in the country's expansion plans. New and promising oil and gas fields have recently been discovered in the Sergipe and Alagoas basin, corresponding to one third of cu

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Sine-cosine optimization approach applied to the parametric estimation in single-phase transformers by considering voltage and current measures

Abstract: In this article, a combinatorial optimization approach for estimating the electrical parameters in single-phase distribution transformers by considering voltage and current measures is presented. A nonlinear programming model was formulated to represent the p

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Analysis of the goodness of fit of the San model for the calculation of the removal percentage of flocculent particles with low initial turbidity values in the problem water

Abstract: In this study, the degree of goodness of fit presented by the San model is determined to calculate the percentage of removal of flocculent particles, when the initial turbidity in the problem water is low. For this, the frequency analysis of the historical tu

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Technical and economic assessment of the development of a Colombian Tight Oil reservoir: a simulation case study of Valle Medio del Magdalena basin

Abstract: Conventional oil reserves in Colombia are depleted. The country´s reserve-to-production ratio is estimated as 5 years. Therefore, the search for new resources and their conversion into proven reserves are essential. In this case, the production of unconventio

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Evaluation of indicators for vehicle penetration routes in the Brazilian transport sector
Luiz Bernardo Baptista

Abstract: Climate change is upon us. The exponential use of fossil fuels for over two centuries is changing the world as we know it. An energy transition towards a greener world is needed and it may entail the decarbonization of several sectors, such as the passenger t

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Survey and calculation of the energy potential and solar, wind and biomass EROI: application to a case study in Argentina
Federico Gabriel Camargo

Abstract: The practical application of renewable energies to solve current environmental problems is still under discussion today. In this article, he surveyed the biomass and biogas potential available in Entre Ríos and usable in Concepción del Uruguay. In the first,

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Impact of strategies to encourage bicycle use on work trips: a case study involving employees of Companhia Riograndense de Saneamento

Abstract: This study identifies the most valued factors for potential bicycle users on work trips and evaluate the impact of implementing different strategies to improve bicycle use. We applied an online stated-preference survey from 127 Companhia Riograndense de Sanea

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Experimental and economic assessment of alkaline electrolyzer for dual-fuel operation in low-displacement diesel engines

Abstract: This investigation evaluated the integration of an alkaline electrolyzer for dual-fuel operation in an experimental test bench of a diesel engine from a techno-economic viewpoint. The characterization of the electrolyzer operation indicated that higher electr

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Thermal time in nitrogen and boron application on irrigated Mombaça grass “Guinea grass”

Abstract: This study aims to evaluate the correlation among growing degree-days (GDD), canopy height (CH), and leaf area index (LAI) for Guinea grass irrigated, considering the different combinations of the nitrogen and boron rates and cycles of regrowth. The experimen

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Design and implementation of a CSI inverter with unipolar SPWM modulation and PR controller for lineal loads

Abstract: This paper presents a detailed implementation of a current source inverter using unipolar sinusoidal pulse width modulation. This method is uncommon in these types of inverters and the semiconductor devices, integrated circuits, sensors, and filters used in c

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Pressure and pressure derivative interpretation of a well in a completed-perforated multilayer reservoir with crossflow

Abstract: Various authors have introduced several models for the characterization of multilayer reservoirs. However, some have failed to provide results when the skin factor of the layers is negative. Therefore, in this work, a model applying the concept of the maximum

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Effect of the liquid-to-powder ratio on physicochemical properties of calcium phosphate cements and of these properties over Biofilm thickness of adhered Staphylococcus Aureus

Abstract: Tricalcium phosphate (TCP) synthetized by high temperature solid state reaction at 1400°C and three derived calcium phosphate cements (CPCs) prepared at liquid to powder (L/P) ratios of 0.33, 0.44 and 0.55 ml/g, respectively, were physicochemically characteri

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Soil and crop spatial variability in maize irrigated with domestic effluent

Abstract: Wastewater use in agriculture is a high-potential alternative for coping with water scarcity. The present study aimed to evaluate the impact of using wastewater and sewage sludge on soil attributes in an irrigated maize plantation in the Brazilian northeaster

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Optimization of parameters of a single effect evaporator for agave syrup production

Abstract: The objective of this study was the design and simulation of a single effect evaporator for an agave syrup production line, using as the main raw material, the aguamiel obtained from Agave salmiana produced in the ejido "Las Mangas" municipality of Saltillo C

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Permeability measurement in porous media under unsaturated paths

Abstract: Understanding the flow through porous media when it is part of geotechnical-hydraulic structures has been a scenario calculated from the most unfavorable situation. The passage of water through the porous skeleton of the soil is considered in a saturated cond

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Landscape visual and sound quality influence on noise pollution propagation in urban green areas

Abstract: The objective of this study was to evaluate both the landscape’s visual and sound quality influence on propagating noise pollution in the Botanical Garden and the São Lourenço Park in Curitiba, Brazil. Data were collected in three transects (A, B, and C), rep

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Evapotranspiration in the Brazilian municipalities surrounding the Itaipu Binacional reservoir: characterization process and estimation methods

Abstract: Seeking to contribute with the management of water resources in the Itaipu Binacional reservoir region, this research aimed to characterize the dynamics of evapotranspiration and evaluate the performance of different mathematical methods, which determine refe

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Learning the therapeutic use of drugs from the three-dimensional spatial information of their molecular structure with convolutional neural networks

Abstract: The development of new molecules is a multi-stage process and clinical trials to verify their efficacy cost billions of dollars each year. Machine learning is a tool that is rapidly advancing in image, voice, and text recognition, and working in silico would

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Compression and encryption of vital sign signals using an SoC-FPGA

Abstract: This article presents the implementation of a remote monitoring system of biomedical signals with cybersecurity support and compression of vital sign signals and data of the patient. This system uses a low-cost microsystem for encrypting and compressing the i

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Structural behavior of construction typologies of the Great Soviet Panel in an area of high seismic danger

Abstract: In a sample of 200 buildings built with the Great Soviet Panel prefabricated system in Santiago the Cuba, pathological damage and structural transformations carried out by the inhabitants are evidenced. Being necessary to evaluate a priori, the incidence of t

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Optimization tools applied to physical asset maintenance management: state of the art

Abstract: This article presents the state of the art of the application of optimization tools such as Genetic Algorithms, Simulation, Neural Networks, Markov Chains and Bayesian Networks in the physical asset maintenance management. The bibliographic references used we

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Isolation and characterization of filamentous fungi from wood and soil samples of “La Lorena”, Sonsón, Antioquia (Colombia), natural reserve

Abstract: Fungi, with all their biological and enzymatic qualities, could have great potential being implemented in industrial processes. In this study, filamentous fungi from Sonsón-Antioquia region were isolated and characterized. A morphological characterization was

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Physical-Mechanical properties of H-10 blocks manufactured in Norte of Santander, Colombia: a case study

Abstract: This work presents the physical-mechanical properties of two types of H-10 blocks of six holes fabricated in two different companies in Norte de Santander, Colombia to provide a general visualization of the ceramic properties of masonry products base clay. Ra

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Using Arduino sensors to monitor vacuum gauge and soil water moisture

Abstract: Sensors associated with the Arduino board can be an alternative to traditional sensors. The objective of this study was to calibrate a capacitive sensor to measure soil moisture and determine the soil water retention curve (< 100 kPa) using the MPX5100DP pres

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Application of biodegradable coatings on ‘Tommy Atkins’ mango for export

Abstract: This study evaluates the effect of a low-cost biodegradable coating formulated with potato starch, rice starch, cassava starch, and gelatin on the postharvest quality of ‘Tommy Atkins’ mango. The experimental design was completely randomized, arranged in a 7x

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Surface modification of a ferritic ductile iron through plasma nitriding

Abstract: This text describes the plasma nitriding of a ductile iron, to increase the surface hardness and improve its wear behavior. A ferritic ductile iron was used and processed with gases (N2 + H2) for 5 hours in a treatment chamber built at the UNAM Physics Instit

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Numerical analysis of aircraft flow exhaust gases to design a curved deflector for Mexico City international airport

Abstract: The numerical simulation results of the flow exhaust gases emitted by different aircraft engines are presented in this work. These results permitted the design of the most appropriate circular arc for a curved deflector to correctly direct the flow at the tim

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Non-technical losses in an electrical distribution system. Energy efficiency as a continuous process

Abstract: This work analyzes the problem of non-technical losses in a low-voltage electrical power distribution system with an artificial intelligence model. The problem focuses on the use of a backpropagation multilayer perceptron neural network, which will quantitati

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Data mining algorithms for predicting the behavior of environmental indicators

Abstract: The need to embrace adequate entrepreneurial focuses to achieve a better environmental performance constitutes an imminent task. Developing predictive models for environmental indicators constitutes the main objective of this paper. An information-technology

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Designing a microtransit system with electric vehicles using discrete-event simulation: case of a university campus

Abstract: This work presents a flexible methodology to design a microtransit system with electric vehicles. The proposed methodology comprises five stages. First, the estimation of the demand is made with qualitative research. Second, the technological capabilities of

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