Excel files and MATLAB programs for numerical solution methods

Excel files and MATLAB programs for Chapter 5 of "Economic Growth: Theory and Numerical Solution Methods" published by Springer Verlag.

Photovoltaic charging multi-station with modular architecture for Light Electric Vehicles

This paper deals with a modular architecture for recharging the batteries of light electric vehicles (LEVs) using a photovoltaic (PV) generator. The architecture is divided into two hierarchical levels. At the top level (master), a microcontroller tracks the maximum power point of the PV generator. This microcontroller executes a PID control algorithm whose output is the setpoint of the microcontrollers of the lower level. At the lower level (slaves) there is a microcontroller for each vehicle charging station. Each microcontroller controls the recharge current of the vehicle battery connected to the station by executing another PID control algorithm. The modular architecture allows the number of charging stations to be extended to 112. Other characteristics of the system are the automatic detection of the nominal voltage of the battery (it allows to recharge batteries of 24V, 36V or 48V, equally) and the inclusion of protection functions as battery overload or detection of not allowed batteriesUniversidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Why Power does not Guarantee Happiness across Cultures

Recent literature has shown that power enhances happiness in the Western context. However, it is likely that this may only hold true in cultures that promote independent and autonomous expression of self. For those in collectivist contexts, it is argued that power could reduce happiness since power can thwart them from achieving relationship harmony. The current paper presents research on the psychological effects of power on happiness carried out in the Western context and the Philippine context. Future directions towards developing a culturally-sensitive theory of power are also elucidated

Optimizing Scan Homogeneity for Building Full-3D Lidars based on Rotating a Multi-Beam Velodyne Rangefinder

Multi-beam lidar (MBL) scanners are compact, light, and accessible 3D sensors with high data rates, but they offer limited vertical resolution and field of view (FOV). Some recent robotics research has profited from the addition of a degree-of-freedom (DOF) to an MBL to build rotating multi-beam lidars (RMBL) that can achieve high-resolution scans with full spherical FOV. In a previous work, we offered a methodology to analyze the complex 3D scan measurement distributions produced by RMBLs with a rolling DOF and no pitching. In this paper, we investigate the effect of introducing constant pitch angles in the construction of the RMBLs with the purpose of finding a kinematic configuration that optimizes scan homogeneity with a spherical FOV. To this end, we propose a scalar index of 3D sensor homogeneity that is based on the spherical formulation of Ripley's K function. The optimization is performed for the widely used Puck (VLP-16) and HDL-32 sensors by Velodyne.This work was partially funded by the Spanish project {DPI2015-65186-R}. The publication has received support from Universidad de Málaga, Campus de Excelencia Andalucía Tech

Construction and Calibration of a Low-Cost 3D Laser Scanner with 360◦ Field of View for Mobile Robots

Navigation of many mobile robots relies on environmental information obtained from three-dimensional (3D) laser scanners. This paper presents a new 360◦ field-of-view 3D laser scanner for mobile robots that avoids the high cost of commercial devices. The 3D scanner is based on spinning a Hokuyo UTM- 30LX-EX two-dimensional (2D) rangefinder around its optical center. The proposed design profits from lessons learned with the development of a previous 3D scanner with pitching motion. Intrinsic calibration of the new device has been performed to obtain both temporal and geometric parameters. The paper also shows the integration of the 3D device in the outdoor mobile robot Andabata.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

Evolution along the sequence of S0 Hubble types induced by dry minor mergers. II - Bulge-disk coupling in the photometric relations through merger-induced internal secular evolution

Galaxy mergers are considered as questionable mechanisms for the evolution of lenticular galaxies (S0's), on the basis that even minor ones induce structural changes that are difficult to reconcile with the strong bulge-disk coupling observed in the photometric scaling relations of S0's. We check if the evolution induced onto S0's by dry intermediate and minor mergers can reproduce their photometric scaling relations, analysing the bulge-disk decompositions of the merger simulations presented in Eliche-Moral et al. (2012). The mergers induce an evolution in the photometric planes compatible with the data of S0's, even in those ones indicating a strong bulge-disk coupling. The mergers drive the formation of the observed photometric relation in some cases, whereas they induce a slight dispersion compatible with data in others. Therefore, this evolutionary mechanism tends to preserve these scaling relations. In those photometric planes where the morphological types segregate, the mergers always induce evolution towards the region populated by S0's. The structural coupling of the bulge and the disk is preserved or reinforced because the mergers trigger internal secular processes in the primary disk that induce significant bulge growth, even although these models do not induce bars. Intermediate and minor mergers can thus be considered as plausible mechanisms for the evolution of S0's attending to their photometric scaling relations, as they can preserve and even strengthen any pre-existing structural bulge-disk coupling, triggering significant internal secular evolution (even in the absence of bars or dissipational effects). This means that it may be difficult to isolate the effects of pure internal secular evolution from those of the merger-driven one in present-day early-type disks (abridged).Comment: Accepted for publication in Astronomy & Astrophysics, 13 pages, 8 figures. Definitive version after proofs. Added references and corrected typo

OH rotational lines as a diagnostic of the warm neutral gas in galaxies

We present Infrared Space Observatory (ISO) observations of several OH, CH and H2O rotational lines toward the bright infrared galaxies NGC253 and NGC1068. As found in the Galactic clouds in SgrB2 and Orion, the extragalactic far-IR OH lines change from absorption to emission depending on the physical conditions and distribution of gas and dust along the line of sight. As a result, most of the OH rotational lines that appear in absorption toward NGC253 are observed in emission toward NGC1068. We show that the far-IR spectrum of OH can be used as a powerful diagnostic to derive the physical conditions of extragalactic neutral gas. In particular, we find that a warm (Tk~150 K, n(H2)< 5 10^4 cm^-3) component of molecular gas with an OH abundance of 10^{-7} from the inner <15'' can qualitatively reproduce the OH lines toward NGC253. Similar temperatures but higher densities (5 10^5 cm^-3) are required to explain the OH emission in NGC1068.Comment: 5 pages, 4 figures, accepted in ApJ Part I (2004, October 6

Teoremas de "Linking" aplicados a problemas elipticos semi-lineares

Orientador: Djairo Guedes de FigueiredoTese (doutorado) - Universidade Estadual de Campinas, Instituto de Matematica e Computação CientíficaResumo: No presente trabalho estudamos variacionalmente alguns problemas elípticos semilineares, com condição de Neumann ou de Dirichlet. No Capítulo 1, a equação em questão é da forma: -'DELTA'u = f(x, u) + h(x) - t, em 'OMEGA'; com condição de Neumann na fronteira...... Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital.Abstract: Not informed.DoutoradoDoutor em Matemátic

Propuesta de programación didáctica para el módulo profesional de Contabilidad y Fiscalidad del Ciclo Formativo de Grado Superior de Administración y Finanzas: Aquí comienza tu profesión

Después de realizar un análisis sobre la programación del módulo profesional de Contabilidad y Fiscalidad (COB) dentro el Ciclo Formativo de Grado Superior de Administración y Finanzas y para el Centro Integrado de Formación Profesional La Laguna en Santa Cruz de Tenerife, se realiza una propuesta de programación didáctica para el módulo profesional con un objetivo claro: acercar la realidad de una empresa al alumnado desde el punto de vista contable. Utilizando la metodología “learnig by doing” o aprender haciendo, donde, como en una empresa real, el alumnado desarrolle el módulo a partir de documentación mercantil y modelos oficiales de las administraciones públicas e instrucciones oportunas, incluyendo además su adaptación al modelo de teleformación para situaciones como la actual, con la crisis sanitaria del COVID 19.After performing an analysis on the programming of the professional module of Accounting and Taxation (COB) within the Higher Education and Finance Training Cycle and for the La Laguna Integrated Professional Training Center in Santa Cruz de Tenerife, a proposal is made of didactic programming for the professional module with a clear objective: to bring the reality of a company closer to the students from the accounting point of view. Using the “learnig by doing” methodology, where, as in a real company, students develop the module based on mercantile documentation with official models of public administrations and appropriate guidelines, including their adaptation to the teletraining model for situations like the current one, with the health crisis of COVID 19