I-V characteristics of in-plane and out-of-plane strained edge-hydrogenated armchair graphene nanoribbons

The effects of tensile strain on the current-voltage (I-V) characteristics of hydrogenated-edge armchair graphene nanoribbons (HAGNRs) are investigated by using DFT theory. The strain is introduced in two different ways related to the two types of systems studied in this work: in-plane strained systems (A), and out-of-plane strained systems due to bending (B). These two kinds of strain lead to make a distinction among three cases: in-plane strained systems with strained electrodes (A1) and with unstrained electrodes (A2), and out-of-plane homogeneously strained systems with unstrained, fixed electrodes (B). The systematic simulations to calculate the electronic transmission between two electrodes were focused on systems of 8 and 11 dimers in width. The results show that the differences between cases A2 and B are negligible, even though the strain mechanisms are different: in the plane case, the strain is uniaxial along its length, while in the bent case the strain is caused by the arc deformation. Based on the study, a new type of NEMS-solid state switching device is proposed.Comment: 22 pages, 7 figure

Edificio de Cámara de Comercio Sede Centro

Trabajo de gradoEl proyecto articula un edificio que presta servicios privados y sociales y una serie de plazas; buscando restablecer la memoria del lugar y el sentido de la Plaza España. Un lugar que reviva la historia de la ciudad, en donde se recreen actividades antiguas y modernas para que cualquier habitante recorra estos espacios sienta pertenencia al lugar, lo habite y viva haciendo parte del Centro Histórico de la ciudad. Así mismo se fortalezca la Cultura de la Legalidad en el sector comercial; como un conjunto de comportamientos, valores y reglas que fomentan el respeto y el cumplimiento de las leyes y normas. El proyecto se origina en retomar la composición a través de los nueve cuadrados; (haciendo semejanza con la manzana catastral a intervenir) y que evaluando los contrapuntos jerárquicos del contexto desde su importancia histórica, los ejes humanos recurrentes,…logre definir dos ejes que se yuxtaponen. Estos se transformarían en volúmenes, que involucrando otros espacios compositivos abiertos y de permanencia que se conectan directamente con la plaza, para crear dinamismo, pero que finalmente al elevarlos se logra mantener y respetar la percepción de espacio libre para vincular la plaza España al proyecto y tener la permanencia y circulación en un solo espacio, vinculando el proyecto al sector.PregradoArquitect

In the search for the ‘Smart’ Source of the Perception of Quality of Life in European Smart Cities

In the last years, cities are actively developing strategies towards the goal of becoming smart with the promise of producing a higher quality of life (QLF) for citizens in the urban environment. This paper seeks to analyze whether smart cities are those with a higher QLF in the urban environment as well as to investigate the smart dimensions that could have an influence on the citizen\u27s perception of QLF. Findings based on a sample of European smart cities indicate that the smart city\u27s promise of increasing the citizen\u27s QLF is true, but it seems to be mainly focused on the outcomes (smart living dimension) and not in other smart dimensions that could be focused on the process to obtain the outcomes (smart governance or smart environment, for example)

Disaster management and emerging technologies: a performance-based perspective

Purpose – This paper aims to analyse how emerging technologies (ETs) impact on improving performance in disaster management (DM) processes and, concretely, their impact on the performance according to the different phases of theDM cycle (preparedness, response, recovery and mitigation). Design/methodology/approach – The methodology is based on a systematic review of the literature. Scopus, ProQuest, EBSCO and Web of Science were used as data sources, and an initial sample of 373 scientific articles was collected. After abstracts and full texts were read and refinements to the search were made, a final corpus of 69 publications was analysed using VOSviewer software for text mining and cluster visualisation. Findings – The results highlight how ETs foster the preparedness and resilience of specific systems when dealing with different phases of the DM cycle. Simulation and disaster risk reduction are the fields of major relevance in the application of ETs to DM. Originality/value – This paper contributes to the literature by adding the lenses of performance measurement, management and accountability in analysing the impact of ETs on DM. It thus represents a starting point for scholars to develop future research on a rapidly and continuously developing topic

Constant Phase Element in the Time Domain: The Problem of Initialization

This research was partially funded by the TIC105 research group of the University of Granada.The constant phase element (CPE) is found in most battery and supercapacitor equivalent circuit models proposed to interpret data in the frequency domain. When these models are used in the time domain, the initial conditions in the fractional differential equations must be correctly imposed. The initial state problem remains controversial and has been analyzed by various authors in the last two decades. This article attempts to clarify this problem by proposing a procedure to prepare the initial state and defining a decay function that reveals the effect of the initial state in several illustrative examples. This decay function depends on the previous history, which is reflected in the time needed to prepare the initial state and on the current profile assumed for this purpose. This effect of the initial state is difficult to separate and can lead to the misinterpretation of the CPE parameter values.University of Granada TIC10

Implementación del Balanced Scorecard en las agencias públicas: una experiencia en los servicios municipales deportivos

The public sector is involved in a context of change. Decentralization, performance measurement and a greater emphasis on outputs are some of the main changes. To give public sector managers efficient tools, the adoption of what is considered to be private sector management styles and techniques is now becoming commonplace. The Balanced Scorecard approach has emerged as a new tool that meets many of the above-mentioned challenges faced by public organizations. Nonetheless, few reports of detailed experience in public sector entities are available. This research paper offers an insight into the process of elaborating the Balanced Scorecard for a public sector agency of sport services.El sector público está inmerso en un contexto de cambios, entre ellos la descentralización, la medición de la ejecución y un mayor énfasis en los resultados. Para dar a los gestores del sector público herramientas eficientes, la adopción de estilos y técnicas del sector privado se está convirtiendo en una práctica común. El Balanced Scorecard ha emergido en las administraciones públicas como una nueva herramienta que satisface las necesidades de información y gestión de muchos de los cambios mencionados. No obstante, es poca la literatura disponible sobre su aplicación en las entidades del sector público. Esta investigación ofrece una visión del proceso de elaboración de un Balanced Scorecard para una agencia pública de servicios deportivos.This research was carried out with financial support from the Spanish National R&D Plan through research project number SEJ2007-67441-ECON-FEDER (Ministry of Science and Innovation) and from the Regional Government of Andalusia (Spain), Centre of Andalusian Studies (PRI160/09) and from the Department of Innovation, Science and Enterprise (Research project number P09-SEJ-5395)

A fractional-order model for calendar aging with dynamic storage conditions

Funding for open access charge: Universidad de Granada / CBUA.Due to the increasing importance of lithium-ion batteries in electric vehicle and renewable energy applications, battery aging is a subject of intense research. Although many laboratory experiments are performed under well-controlled static conditions, batteries are stored and operated under varying conditions of temperature and state of charge in their real-life performance, so that a suitable model for predicting the effects of calendar aging in lithium-ion batteries with dynamic conditions is highly desirable. In this paper, we review previous models to calculate capacity loss due to calendar aging under variable temperature and state-of-charge conditions according to experimentally observed power-law behavior, and propose a novel model based on fractional calculus. To validate the new model, we compare its predictions with experimental results showing that it can reproduce the non-monotonic behavior that is observed when the state of charge or the temperature change significantly. This is an interesting application of fractional calculus since this characteristic is not obtained with non-fractional models.Universidad de Granada / CBU

Different Levels of Smart and Sustainable Cities Construction Using e-Participation Tools in European and Central Asian Countries

Cities are developing strategies to deal with the complex challenges of global change and sustainability. These initiatives have involved the implementation of Information and Communication Technologies (ICTs) as a good driver for achieving sustainability because digital transformation can boost sustainable development strategies, providing opportunities to accelerate transformation. Smart City (SC) models built on empowering people in making public decisions favor access to sustainable development solutions based on knowledge and innovation. Nonetheless, SC experiences around the world denote divergent conceptions of SCs which could lead to different SCs construction. It deserves a more thorough understanding of the nature of collaboration in different settings. Therefore, this paper contributes to the debate on the different uses of ICTs in SCs construction in developing vs. developed countries, by examining the use of ICTs for creating collaborative environments in a sample of SCs in different countries, depending on their economic level, and seeking to identify differences in the objectives pursued by city governments with the use of these technologies. To achieve this aim, e-participation platforms, apps or social media platforms (European and Central Asia SCs) are examined for identifying SCs construction differences between developed vs. developing countries. The findings of this paper put an emphasis on the need for taking into account the differences among SCs in developed vs. developing countries when raking or when performance measurement is designed, because the assessment should be tailored to the cities’ particular visions and priorities for achieving their objectives.Centre of Andalusian Studies (Research proj. No. PR137/19)Ministry of Science, Innovation and Universities (Research proj. No. RTI2018-095344-A100