The social discount rate and the environment [La tasa social de descuento y el medio ambiente]

[No abstract available

International market selection methodology: A case analysis for the export of carbonated beverages [Metodología para la seleccon de mercados internacionales: Un analisis de caso para la exportacon de bebidas carbonatadas]

[No abstract available

Gamified tool to mitigate change resistance causes in software process improvement [Herramienta gamificada para mitigar causas de resistencia al cambio en mejora de procesos software]

Software development companies are interested in the implementation of best practices for facilitating their processes improvement with the purpose to increase the quality of their software products. However, software process improvement initiatives are complex because of look for modifying the conditions and behaviors of the professionals in charge of these initiatives. Therefore, exist a constant search of strategies for decreasing change resistance and gamification is one of the most used for helping to influence people's behaviors and contribute to reach the improvement goals. This work presents a web platform called the 'Planetary exploration system', where work team members can explore different worlds through mission accomplishment. Such missions allow winning points, achievements and experiences for ascending in the positions board and obtain virtual and real rewards. The platform can be integrated with software project management systems, incident management systems or support tools for other SPI processes. © 2020 AISTI

Formulations for joint order picking problems in low-level picker-to-part systems

This article introduces several mathematical formulations for the joint order picking problem (JOPP) in low-level picker-to-part warehousing systems. In order to represent real warehousing environments, the proposed models minimize performance measures such as travel distance, travel time and tardiness, considering multi-block warehouses, due dates, and multiple pickers. The number of constraints and decision variables required for each proposed model is calculated, demonstrating the complexity of solving medium and long-sized problems in reasonable computing time using exact methods, so it is still recommendable to solve these JOPP using metaheuristics. The proposed models can be followed as a reference for new solution methods that yield efficient and fast solutions. © 2020, Institute of Advanced Engineering and Science. All rights reserved

Social innovation: Evolution of the concept over time [Innovación social: Evolución del concepto en el tiempo]

This article aims to characterize innovation based on the evolution it has had over time, and emphasizing the measurement criteria used between 2016 and 2018. In the first instance, elements are needed to understand the phenomenon and its different meanings, and then carry out a comparative review between sources and existing proposals. Data mining and qualitative analysis of the categories selected in the study were applied, supported by information from databases such as Scopus, Web of Science and Scielo. The exercise was carried out with the support of the Technological Surveillance and Competitive Intelligence Program of the Center for Research for Development and Innovation of the Universidad Pontificia Bolivariana, supplemented with specific searches. The main findings show trends compared to authors and types of metrics used in our context, which allows showing the growing importance of social innovation and its measurements at the level of results, effects and impacts, as part of the scientific work in the Latin American social field. © 2020, Universidad del Zulia. All rights reserved

Combustion of a hydrogen/carbon monoxide/carbon dioxide mixture in hot and diluted streams

This work presents an experimental investigation on the combustion behavior of a mixture of hydrogen, carbon monoxide and carbon dioxide in hot and diluted streams, like those obtain under flameless combustion regimes. A jet in a hot coflow burner was used to carry out the experiments. This burner consists of a central fuel jet surrounded by a combustion products stream, which comes from a premixed flame under lean conditions. In this way, it is possible to obtain high temperature and low oxygen concentration in the jet flame. Here, a mixture of 40% H2, 40% CO and 20% CO was issued through the jet nozzle. This composition corresponds to a renewable fuel known as syngas. Three oxygen composition in the oxidant stream were evaluated: 2.0%, 4.7% and 6.9%. Temperature and species concentration values were measured along axial and radial lines under a fix Reynolds's number. The results suggest that when oxygen concentration increases, CO and NO emissions of the total process decreases. © 2020 Published under licence by IOP Publishing Ltd

Multi-Messenger Physics With the Pierre Auger Observatory

An overview of the multi-messenger capabilities of the Pierre Auger Observatory is presented. The techniques and performance of searching for Ultra-High Energy neutrinos, photons and neutrons are described. Some of the most relevant results are reviewed, such as stringent upper bounds that were placed to a flux of diffuse cosmogenic neutrinos and photons, bounds placed on neutrinos emitted from compact binary mergers that were detected by LIGO and Virgo during their first and second observing runs, as well as searches for high energy photons and neutrons from the Galactic center that constrain the properties of the putative Galactic PeVatron, observed by the H.E.S.S. collaboration. The observation of directional correlations between ultra-high energy cosmic rays and either high energy astrophysical neutrinos or specific source populations, weighted by their electromagnetic radiation, are also discussed. They constitute additional multi-messenger approaches aimed at identifying the sources of high energy cosmic rays. © Copyright © 2019 Kampert, Alejandro Mostafa, Zas and The Pierre Auger Collaboration

Exploration of serious games on environmental issues

Nowadays, the environmental problems for which the world is going through has generated several actions aimed at generating environmental education, using various means to achieve it. One of the tools that education and publicity among other areas are using are serious games, which has gained popularity, being used in various sectors such as education, trade, health, environment and others because they add entertainment to communication processes or educational. Serious games are used as one way to sensitize people about the depletion of natural resources and the consequences of environmental imbalance. Serious games are used as one means to sensitize people about the depletion of natural resources and the consequences of environmental imbalance. This article presents an exploration of serious games focused on environmental issues as well as identifying some of its features and opportunities for improvement. This paper presents a serious exploration of games applied to the area of education and environmental awareness, identifying elements that will be useful when developing technological tools such as initiatives and innovations in environmental education is presented. © Springer Nature Switzerland AG 2018

A new way for comparing solutions to non-technical electricity losses in South America

Non-technical losses are a component of energy losses associated with energy theft and fraud by the final consumers, hindering revenues of distribution utilities. This paper aims to compare the implemented solutions in the countries of South America to reduce non-technical losses. In this comparison, we introduce a new indicator based on the World Bank's database as input information. Considering that some regulatory agencies take policy actions related to non-technical losses to improve the quality of the electricity supply, we also present a correlation analysis of the proposed indicator and the electricity supply quality index. This analysis shows that in most of South America's countries, there is a high correlation within the studied horizon. An adequate characterization of the temporal variation in the proposed indicator can characterize the evolution of the consumers' perception of the quality in the electricity supply. This indicator allows each country's regulatory agency to analyze how the performed action is reducing non-technical losses concerning neighboring countries. © 2020 Elsevier Lt

Genetic Algorithms for the Picker Routing Problem in Multi-block Warehouses

This article presents a genetic algorithm (GA) to solve the picker routing problem in multiple-block warehouses in order to minimize the traveled distance. The GA uses survival, crossover, immigration, and mutation operators, and is complemented by a local search heuristic. The genetic algorithm provides average distance savings of 13.9% when compared with s-shape strategy, and distance savings of 23.3% when compared with the GA with the aisle-by-aisle policy. We concluded that the GA performs better as the number of blocks increases, and as the percentage of picking locations to visit decreases. © 2019, Springer Nature Switzerland AG