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Knowledge Transfer in Software Development Teams Using Gamification: A Systematic Literature Review
No full textOne of the objectives of knowledge management is knowledge transfer. In software development projects, collaborative work is the key to teamwork. These projects are classified as knowledge-intensive, and their activities are related to the materialization of an organization’s knowledge. Therefore, software development teams require knowledge transfer capabilities. However, there are difficulties associated with communication and collaboration that create challenges for software development teams and require mitigation. One way to mitigate such problems is the use of gamification. This paper presents the results of a systematic review of the literature to identify gamification based strategies that encourage knowledge transfer from software development teams. These strategies were classified, and interesting approaches were found to identify gamification as a key strategy for software development teams. The use of gamification achieves positive results in the generation of knowledge transfer capabilities in software development teams. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG
Dry-co-grinding of doped TiO2 with nitrogen, silicon or selenium for enhanced photocatalytic activity under UV/visible and visible light irradiation for environmental applications
No full textTiO2 doped with nitrogen (N), silicon (Si), or selenium (Se) (N-TiO2, Si-TiO2, and Se-TiO2) were obtained by the integrated sol-gel and solvothermal method with short time of crystallization and low temperature. The UV/visible and visible light absorption and photocatalytic activity of these doped TiO2 materials were improved by a dry-co-grinding process with a short grinding time and low rotational speed (30 min at 200 rpm) to obtain N-TiO2/Si-TiO2 and N-TiO2/Se-TiO2 catalysts. The materials were characterized by XRD, Raman, BET surface area and porosity, XRF, SEM, TEM, FTIR-ATR, and UV/vis-DRS analyses. The photocatalytic activity of these materials was evaluated by the degradation of phenol under UV/visible and visible light irradiation. The integrated sol-gel and solvothermal methods with short time of crystallization (2 h) and low temperature (225 °C), and the dry-co-grinding process during 30 min at 200 rpm led to materials (N-TiO2/Si-TiO2 and N-TiO2/Se-TiO2) with higher specific surface area, a reduction in the band gap value, and an enhancement of the absorption in the visible light spectrum. Moreover, N-TiO2/Si-TiO2 and N-TiO2/Se-TiO2 exhibited higher photocatalytic activities for degradation of phenol under UV/visible and visible light irradiation than those obtained with the doped TiO2, synthesized TiO2 or TiO2 P25. © 2018 Elsevier Lt
Effect of Heat Treatment on Tribological Properties of Ni-B Coatings on Low Carbon Steel: Wear Maps and Wear Mechanisms
No full textAmong the alternatives for using low-carbon steel in parts with heavy wear, as gears and bearing surfaces, Ni-B electroless coatings deposited on these steels are considered due to their wear resistance. Wear maps, elaborated from friction or wear results found for different evaluated conditions, are a very useful tool for the selection of materials based on tribological properties. However, wear maps for electroless Ni-B coatings are very scarce. In this work, dry sliding wear tests with different loads and sliding velocities were performed on Ni-B electroless coatings applied on AISI/SAE 1018 steel, with and without heat treatment at 450 °C for 1 h, with the aim of determining the effect of the heat treatment on the friction coefficients and wear rates. Contour and profile maps, and finally friction and wear maps, were constructed for each of the coatings evaluated. The coating properties before and after the heat treatment were studied by means of scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), scratch tests, nanoindentation, and differential scanning calorimetry (DSC). Sliding wear tracks were studied using SEM, energy-dispersive spectroscopy (EDS), and micro-Raman spectroscopy. Good agreement between experimental and predicted values was found in friction and wear maps. Wear mechanisms change from flattening in less severe conditions to abrasion in more severe conditions, besides spalling and adhesive wear in untreated coatings. Moreover, abrasive wear is lower in heat-treated coating than in untreated coating. © 2019 by ASME
Teaching methodology in logistics courses for business administration programs [Metodología de enseñanza en cursos de logística para programas de administración de empresas]
No full textThis article aims to present a teaching methodology based on learning-doing and service-learning approaches for logistics training in business managers. This with the aim of responding to the real needs of companies and allowing the appropriation of knowledge and skills offered in undergraduate university courses. Through student surveys, it is determined that the proposed methodology is relevant and consistent for use in the professional practice. The methodology develops competencies to solve real problems in companies, and also strengthens and puts into practice the knowledge learned in logistics management and other subjects of business administration. © 2019, Centro de Informacion Tecnologica
Diels-Alder Reactivity of a Chiral Anthracene Template with Symmetrical and Unsymmetrical Dienophiles: A DFT Study
No full textIn this work, we used Density Functional Theory calculations to assess the factors that control the reactivity of a chiral anthracene template with three sets of dienophiles including maleic anhydrides, maleimides and acetoxy lactones in the context of Diels-Alder cycloadditions. The results obtained here (at the M06-2X/6-311++G(d,p) level of theory) suggest that the activation energies for maleic anhydrides and acetoxy lactones are dependent on the nature of the substituent in the dienophile. Among all studied substituents, only −CN reduces the energy barrier of the cycloaddition. For maleimides, the activation energies are independent of the heteroatom of the dienophile and the R group attached to it. The analysis of frontier molecular orbitals, charge transfer and the activation strain model (at the M06-2X/TZVP level based on M06-2X/6-311++G(d,p) geometries) suggest that the activation energies in maleic anhydrides are mainly controlled by the amount of charge transfer from the diene to the dienophile during cycloaddition. For maleimides, there is a dual control of interaction and strain energies on the activation energies, whereas for the acetoxy lactones the activation energies seem to be controlled by the degree of template distortion at the transition state. Finally, calculations show that considering a catalyst on the studied cycloadditions changes the reaction mechanism from concerted to stepwise and proceed with much lower activation energies. © 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA
Proposal of an assessment framework for gamified environments: A case study
No full textGamification is used in several contexts, such as marketing, education, and public health. The authors implement gamification to promote a dynamic environment relative to software process improvement. However, well-established theoretical guidelines to design gamified experiences are lacking. The authors propose a framework to assess gamified environments, identify and adopt gamification principles, as well as design gamified activities. The proposed framework helps users create gamified experiences that satisfy the purposes, goals, principles, and elements defined as fundamental gamification components. Here, the authors apply the proposed framework to a video scrum simulation to assess the adoption of gamification principles. The case study includes identification of gamification principles incorporated in the video scrum and their relationships to the elements of the mechanics, dynamics, and emotions framework. The results show that the game elements defined in the design layer of the proposed framework were realised in the video scrum simulation. © 2019 Institution of Engineering and Technology. All Rights Reserved
Nonadiabatic effects in the nuclear probability and flux densities through the fractional Schrödinger equation
No full textNonadiabatic effects in the nuclear dynamics of the H 2 + molecular ion, initiated by ionization of the H 2 molecule, is studied by means of the probability and flux distribution functions arising from the space fractional Schrödinger equation. In order to solve the fractional Schrödinger eigenvalue equation, it is shown that the quantum Riesz fractional derivative operator fulfills the usual properties of the quantum momentum operator acting on the bra and ket vectors of the abstract Hilbert space. Then, the fractional Fourier grid Hamiltonian method is implemented and applied to molecular vibrations. The eigenenergies and eigenfunctions of the fractional Schrödinger equation describing the vibrational motion of the H 2 + and D 2 + molecules are analyzed. In particular, it is shown that the position-momentum Heisenberg's uncertainty relationship holds independently of the fractional Schrödinger equation. Finally, the probability and flux distributions are presented, demonstrating the applicability of the fractional Schrödinger equation for taking into account nonadiabatic effects. © 2019 Wiley Periodicals, Inc
Institutions and entrepreneurship in the economic crisis
No full textSince the 1980s, the importance of entrepreneurial activity to economic and social development in all countries and regions around the world has increased. Not surprisingly, high expectations are placed by economic agents and governments on entrepreneurship as one of the key elements to fighting the global economic crisis. The objective of this chapter is to analyze the influence of institutions on entrepreneurship, evaluating the impact of the economic crisis on that relationship. Thus, by panel data models, we show the impact of formal and informal institutions on the rate of entrepreneurship in two different scenarios: before the economic crisis (2006-2007) and during the crisis (2008-2009). In general terms, the results of the study indicate that informal institutions are more important than formal institutions for the promotion of entrepreneurship and that the impact of these institutions on entrepreneurship is more relevant during the crisis. Also, the findings indicate that the economic crisis has a positive impact on entrepreneurial activity, but that this impact is higher in countries with a lower income. This could be very useful for the design of governmental policies and strategies to help overcome the economic crisis. © 2011 Nova Science Publishers, Inc. All rights reserved
A 3-Year Sample of Almost 1,600 Elves Recorded Above South America by the Pierre Auger Cosmic-Ray Observatory
No full textElves are a class of transient luminous events, with a radial extent typically greater than 250 km, that occur in the lower ionosphere above strong electrical storms. We report the observation of 1,598 elves, from 2014 to 2016, recorded with unprecedented time resolution (100 ns) using the fluorescence detector (FD) of the Pierre Auger Cosmic-Ray Observatory. The Auger Observatory is located in the Mendoza province of Argentina with a viewing footprint for elve observations of 3.106 km2, reaching areas above the Pacific and Atlantic Oceans, as well as the Córdoba region, which is known for severe convective thunderstorms. Primarily designed for ultrahigh energy cosmic-ray observations, the Auger FD turns out to be very sensitive to the ultraviolet emission in elves. The detector features modified Schmidt optics with large apertures resulting in a field of view that spans the horizon, and year-round operation on dark nights with low moonlight background, when the local weather is favorable. The measured light profiles of 18% of the elve events have more than one peak, compatible with intracloud activity. Within the 3-year sample, 72% of the elves correlate with the far-field radiation measurements of the World Wide Lightning Location Network. The Auger Observatory plans to continue operations until at least 2025, including elve observations and analysis. To the best of our knowledge, this observatory is the only facility on Earth that measures elves with year-round operation and full horizon coverage. ©2020. The Authors
The judicial activism of the constitutional judge in Latin-America and Spain [El activismo judicial del juez constitucional en iberoamérica]
No full textThe concept of judicial activism is an American creation with a lot of influence in Ibero-America. Through the years, many definitions have been given to judicial activism, which merges with the expression «government by judges». The concept has been criticized lately by the doctrine due to its different meanings, despite some interpretations of the Supreme Court of the United States allowing, from the judicial perspective, to better identify the cases in which the judges are called to be activists. However, these interpretations of judicial activism must be adapted to be correctly used in the Ibero-American context, because of the particularities of social inequality, problems in the distribution of wealth and the malfunctioning of democratic mech-anisms, which varies widely in our culture. © 2020, Centro Estudios Politicos Constitucionales. All rights reserved