The Soundscape and Listening as an Approach to Sensuous Urbanism: The Case of Puerta del Sol (Madrid)

This article focuses on the placemaking process and experimental research on the citizens' assessment of the soundscape in Puerta del Sol in Madrid. Numerous studies conducted in recent decades have shown that sound is a crucial element capable of providing new insights into the relationship between human beings and the environment. Sound possesses physical-sensory-perceptual qualities which connect the emotional and the rational aspects of the experience of the place, overcoming the aesthetic/scientific duality. By default, the soundscape is the result of a collective production. It is the resonant expression of the multiple activities and uses that inhabit a space. The soundscape of everyday life provides a vision of life in a particular place, giving meaning and a singular character to the fact of living there. The concept and methods of the soundscape arise from sensitive experiences of the place in direct relation to a community. This exploratory research focused on in situ methods (soundwalks, improvised interview mappings, sound archives, performances, and collective sound actions) as expressions of collective listening to place. This article also focuses on how to map and share the result of this research, the technology to build a collective digital place as a place of confluence of experiences, citizen knowledge, and reflection on the situated soundscape

Determinación de un plan operativo semanal para la Red Andaluza de Laboratorios Clínicos

Presentamos un modelo para coordinar el funcionamiento en una Red Regional de Laboratorios Clínicos, cuya resolución permite la reasignación de recursos, la redistribución de cargas y la reorganización de los flujos de muestras clínicas en dicha. Para ello, se determina un plan de producción y transporte: primero en un nivel táctico (anual) y luego a un nivel operativo (semanal). Se plantea como un problema de flujo multicommodity que conduce a una formulación entera mixta. Se presenta experimentación aplicada a la reordenación de las derivaciones de muestras entre los 32 nodos principales de la Red Andaluza de Laboratorios Clínicos.Andalucía. Junt

An Evolutionary Computational Approach for the Problem of Unit Commitment and Economic Dispatch in Microgrids under Several Operation Modes

In the last decades, new types of generation technologies have emerged and have been gradually integrated into the existing power systems, moving their classical architectures to distributed systems. Despite the positive features associated to this paradigm, new problems arise such as coordination and uncertainty. In this framework, microgrids constitute an effective solution to deal with the coordination and operation of these distributed energy resources. This paper proposes a Genetic Algorithm (GA) to address the combined problem of Unit Commitment (UC) and Economic Dispatch (ED). With this end, a model of a microgrid is introduced together with all the control variables and physical constraints. To optimally operate the microgrid, three operation modes are introduced. The first two attend to optimize economical and environmental factors, while the last operation mode considers the errors induced by the uncertainties in the demand forecasting. Therefore, it achieves a robust design that guarantees the power supply for different confidence levels. Finally, the algorithm was applied to an example scenario to illustrate its performance. The achieved simulation results demonstrate the validity of the proposed approach.Ministerio de Ciencia, Innovación y Universidades TEC2016-80242-PMinisterio de Economía y Competitividad PCIN-2015-043Universidad de Sevilla Programa propio de I+D+

Fluorescence emission analysis of photodynamic therapy photosensitizer as a monitoring biomarker

Photodynamic Therapy is a selective optical tumor destruction technique with practically no secondary effects. Monitoring by fluorescence photosensitizer emission is essential for an adequate treatment dosimetry, which avoids recurrence.This work has been partially supported by the project “New active phases in transition metals and rare earth nano-oxides stabilized at high pressure” (MAT2015-69508-P) of the Spanish Ministry of Economy and Competitiveness, cofunded by FEDER funds, and by the San Cándido Foundation

Double-zero degeneracy and heteroclinic cycles in a perturbation of the Lorenz system

In this paper we consider a 3D three-parameter unfolding close to the normal form of the triple-zero bifurcation exhibited by the Lorenz system. First we study analytically the double-zero degeneracy (a double-zero eigenvalue with geometric multiplicity two) and two Hopf bifurcations. We focus on the more complex case in which the double-zero degeneracy organizes several codimension-one singularities, namely transcritical, pitchfork, Hopf and heteroclinic bifurcations. The analysis of the normal form of a Hopf-transcritical bifurcation allows to obtain the expressions for the corresponding bifurcation curves. A degenerate double-zero bifurcation is also considered. The theoretical information obtained is very helpful to start a numerical study of the 3D system. Thus, the presence of degenerate heteroclinic and homoclinic orbits, T-point heteroclinic loops and chaotic attractors is detected. We find numerical evidence that, at least, four curves of codimension-two global bifurcations are related to the triple-zero degeneracy in the system analyzed.Ministerio de Economía y Competitividad MTM2017-87915-C2-1-PMinisterio de Ciencia, Innovación y Universidades - Fondos FEDER PGC2018-096265-B-I0Consejería de Economía, Innovación, Ciencia y Empleo - Junta de Andalucía FQM-276, TIC-0130, UHU-1260150 y P20_0116

Determination of the relationship of expansion in soils of Mendoza (Argentina)

El objetivo fue lograr Índices de Corte ajustados a los suelos de las regiones en estudio y relacionar los mismos con determinaciones sencillas de laboratorio como volumen de sedimentación. Se observó en la región una gran disparidad de métodos para calcular el plano proyecto a obtener y la aplicación de valores de relación corte/relleno sin validación local. El trabajo se realizó en la provincia de Mendoza. Se relevaron 22 parcelas en las zonas irrigadas por los ríos Mendoza y Tunuyán. Los valores promedio de relación de expansión obtenidos, de acuerdo con el tipo de suelo, fueron: arenoso 1,04; franco 1,4; arcilloso 1,71; franco-arenoso 1,29; francoarcillo- limoso 1,71; franco-arcilloso 1,64 y franco-limoso 1,34, respectivamente.The objective was to achieve Indexes of Cut adjusted to the soils of the regions in study and to relate the same ones with simple determinations of laboratory like sedimentation volume. It was observed in the region a great disparity of methods to use for the calculation of the plane project to obtain and the application of values of relationship cut/fill without local validation. The work was carried out in Mendoza's county, 22 parcels were raised in the areas irrigated by the rivers Mendoza and Tunuyán. The averages values obtained of expansion relationship, according to the each soil, were: sandy 1.04; loam 1.4; clay 1.71; sandy loam 1.29; silt clay loam 1.71; clay loam 1.64 and silt loam 1.34.Fil: Rodríguez Plaza, Luis. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Cátedra de Topología AgrícolaFil: Maffei, José. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Cátedra de EdafologíaFil: Atencio, Alejandro. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Cátedra de Topología AgrícolaFil: Castro, Guillermo. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Cátedra de Topología AgrícolaFil: Rosatto, Héctor.Fil: Laureda, Daniel

Comentarios sobre “Puntos de equilibrio asintóticamente estables en nuevos sistemas caóticos”

In the commented paper ten nonlinear chaotic systems are presented. Authors state that these systems do not exhibit Shilnikov chaos. Unfortunately, this assertion is not correctly proved because they use an erroneous theorem from the literature.En el trabajo comentado, los autores presentan diez sistemas autónomos no lineales caóticos, de los que afirman que no tienen caos en el sentido de Shilnikov. Desgraciadamente, esta afirmación carece de fundamento pues utilizan un teorema erróneo de la literatura.Ministerio de Educación y Ciencia (Spain), Plan Nacional I+D+I co-financed / FEDER MTM2014-56272-C2Consejería de Economía, Innovación, Ciencia y Empleo de la Junta de Andalucía (Spain) FQM-276, TIC-0130Consejería de Economía, Innovación, Ciencia y Empleo de la Junta de Andalucía (Spain) P12-FQM-165

On the Takens-Bogdanov Bifurcation in the Chua’s Equation

The analysis of the Takens-Bogdanov bifurcation of the equilibrium at the origin in the Chua’s equation with a cubic nonlinearity is carried out. The local analysis provides, in first approximation, different bifurcation sets, where the presence of several dynamical behaviours (including periodic, homoclinic and heteroclinic orbits) is predicted. The local results are used as a guide to apply the adequate numerical methods to obtain a global understanding of the bifurcation sets. The study of the normal form of the Takens-Bogdanov bifurcation shows the presence of a degenerate (codimension-three) situation, which is analyzed in both homoclinic and heteroclinic cases

Study of a homoclinic canard explosion from a degenerate center

Canard explosion is an appealing event occurring in singularly perturbed systems. In this phenomenon, upon variation of a parameter within an exponentially small range, the amplitude of a small limit cycle increases abruptly. In this letter we analyze the canard explosion in a limit cycle related to a degenerate center (with zero Jacobian matrix). We provide a second-order approximation of the critical value of the parameter for which the canard explosion occurs. Numerical results are compared with the analytical predictions and excellent agreements are found. As in this problem the canard explosion ends in a homoclinic connection, a very good approximation for the homoclinic curve in the parameter plane is also obtained.This work has been partially supported by the Ministerio de Econom´ıa y Competitividad, Spain (MTM2017- 87915-C2-1-P), by the Ministerio de Ciencia, Innovaci´on y Universidades, Spain (PGC2018-096265-B-I00) and by the Consejer´ıa de Econom´ıa, Innovaci´on, Ciencia y Empleo de la Junta de Andaluc´ıa, Spain (projects FQM-276, TIC-0130 and UHU-1260150). B.-W.Q. is also supported by the National Natural Science Foundation of China (No. 12001110)