Visual Localisation of Mobile Devices in an Indoor Environment under Network Delay Conditions

Current progresses in home automation and service robotic environment have highlighted the need to develop interoperability mechanisms that allow a standard communication between the two systems. During the development of the DHCompliant protocol, the problem of locating mobile devices in an indoor environment has been investigated. The communication of the device with the location service has been carried out to study the time delay that web services offer in front of the sockets. The importance of obtaining data from real-time location systems portends that a basic tool for interoperability, such as web services, can be ineffective in this scenario because of the delays added in the invocation of services. This paper is focused on introducing a web service to resolve a coordinates request without any significant delay in comparison with the sockets

El equilibrio dinámico. propuesta de unidad didáctica para tercer curso de educación primaria.

El presente Trabajo de Fin de Grado muestra una propuesta de unidad didáctica para el desarrollo del factor perceptivo motriz del equilibrio dinámico en el ámbito escolar, concretamente en tercer curso de educación primaria. Con este diseño de unidad, se pretende abordar todos los aspectos necesarios para conocer mejor el equilibrio dinámico y así poder dar respuesta y apoyo a futuros docentes, además de poder profundizar y focalizarnos en un solo tipo de equilibrio, lo que nos permitirá vivenciarlo de manera más intensa y poder diseñar actividades y retos más específicos a los alumnos.The present Final Degree Project displays a didactic proposal of a teaching unit for the development of the motor perceptive factor involved in the dynamic balance in the school setting, specifically regarding the third grade of primary education. This pedagogical proposal aims at addressing all the required aspects for a better understanding of the dynamic balance in order to offer a response and support to future teachers. Furthermore, it enables us to deepen and focus on one specific type of balance, which will allow us to experience it in a deeper way and to design more specific activities and goals for the students.Grado en Educación Primari

Generation and Dispersion Model of Gaseous Emissions from Sanitary Landfills

A mathematical model was developed to quantify the environmental impact produced by the gases emission from sanitary landfills. The stages of gas generation and diffusion were modeled using waste and cover materials placed in a landfill over an isotropic porous medium, while the dispersion stage was modeled for the atmosphere using a Gaussian model. The United States Environmental Protection Agency (USEPA) criteria were adopted for the estimation of greenhouse gases emissions. The MATLAB computer program was used to prepare simulations of a proposed sanitary landfill to serve the municipalities of Temuco and Padre Las Casas in Chile, considering a lifetime of 20 years. The simulated results show that the conditions of confinement have a greater incidence on the rate of gas emission than does the quantity of waste disposed. It was also concluded that the level of environmental impact varies considerably according to the evaluation scenario and the project design

Effects of litter mixing on litter decomposition and soilproperties along simulated invasion gradients of non-nativetrees

Aims Plant invasions generally lead to mixtures betweennative and non-native litter. We assess the interactionsbetween leaf litters from two invasive non-native trees(Robinia pseudoacia or Ailanthus altissima) and the nativePopulus alba on litter decomposition, nutrient releaseand soil properties along two gradients of invasion.Methods Microcosms with field-collected soil coveredby varying proportions of native and non-native littersimulated the two invasion gradients. We assessed theproportion of remaining litter mass and nutrient mass(N, P, C), and soil C, N-NO3−, total N, and pH, fivetimes throughout a period of 11 months. Observedvalues were compared to the expected values on theassumption of no interactions.Results Litter mass and C mass decayed slower inRobinia and faster in Ailanthus than in Populus. Thethree species immobilized N and P. Soil properties didnot differ across pure litters. Both litter mixture gradientsshowed additive or antagonistic interactions onlitter decomposition, whereas N and P mass were equalor higher than expected. The proportion of non-nativelitter in the mixture had non-linear effects on mostvariables, suggesting that the impact of these nonnativetrees on litter decay levels off or even declinesas they become more abundant.Conclusion The impacts of Ailanthus and Robinia litteron soil processes should not be derived from singlespecies experiments, both due to non-additive effectsand to non-linear responses to litter abundance.Ministerio de Ciencia, Innovación y UniversidadesComunidad de Madri

Origin and sedimentary context of Cenozoic exotic copper deposits from the Atacama Desert, northern Chile

[ES] Este trabajo pretende describir los depósitos de cobre exótico presentes en la mina El Tesoro (norte de Chile) y determinar los procesos y el contexto sedimentario implicados en su formación. El Tesoro consta de dos depósitos de cobre exótico concordantes a la estratificación y separados entre sí por ~130 m de facies detríticas estériles. En el nivel mineralizado inferior, hospedado en conglomerados fluviales intercalados con calizas arenosas lacustres, el cobre se presenta como una masa entre los clastos de tonos verde azulados, constituida principalmente por crisocola, y de tonos negros, formada por “copper wad”. En el nivel superior, alojado en brechas de abanico aluvial, la mineralización está presente como una masa homogénea de color verde entre los clastos y también como clastos angulosos retrabajados de crisocola. Ocasionalmente, en este depósito se observan envueltas irregulares de cobre alrededor de clastos no mineralizados. Este estudio permite confirmar que se trata de dos cuerpos exóticos sinsedimentarios formados por eventos y mecanismos diferentes. En el cuerpo inferior, el cobre fue transportado en solución y precipitó en facies gruesas de relleno de canal en zonas distales a la fuente de cobre. En el caso del depósito superior, los clastos mineralizados retrabajados indican que la erosión y el transporte físico también contribuyeron a su formación. Este cuerpo se habría originado más cerca de la fuente de cobre en comparación con el depósito inferior y, además, también podría haber sido formado parcialmente por procesos de pedogénesis.[EN] This works aims to describe the exotic copper deposits from the El Tesoro copper mine (northern Chile) and to determine the processes and the sedimentary context involved in their formation. El Tesoro consists of two exotic-Cu bodies concordant with stratification and separated by ~130 m of barren detritic deposits. The lower exotic-Cu deposit is hosted in fluvio-alluvial conglomerates interbedded with lacustrine sandy limestones. Copper occurs as a homogeneous green (chrysocolla) and black (copper wad) paste between the clasts. The upper deposit is hosted in alluvial fan breccias. In this case, the mineralization consists of a homogeneous green paste and also reworked angular clasts of chrysocolla. Occasionally, it also occurs as coatings surrounding non-mineralized clasts. This work confirms that these deposits were synsedimentary and formed during separate events and by different mechanisms. In the lower ore deposit, copper was transported in solution and precipitated within coarse-grained facies of channel-fill deposits in distal parts related to the copper source. However, the presence of mineralized reworked clasts in the upper ore deposit reveals that erosion and physical transport also played a role in its formation. This ore deposit was originated closer to the copper source and could have been partially formed by pedogenic processes.Este trabajo ha sido financiado por la beca CONICYTPCHA/ Doctorado Nacional/2016-21160193 (Chile) y por los proyectos de investigación FONDECYT Nº1121041 y Proyecto Anillos ACT-1203 (Chile), LMI-COPEDIM (Chile-Francia) y CGL2014-54828P (España).Peer reviewe

Buck derived converters based on gallium nitride devices for Envelope Tracking applications

Envelope tracking (ET) is a technique designed to enhance the efficiency of radio frequency power amplifiers (RF PA). It is based on providing the voltage to the RF PA with variations that mimic the shape of the envelope of the communication signal that the RF PA is processing. As the bandwidth of these signals can be around several megahertz, the switching frequency of the switching mode power supply designed for ET applications has to be very high. The good switching characteristics of Gallium Nitride devices makes them suitable for this application. This paper presents two multiphase converters to be used as envelope modulators in envelope tracking application

The effect of motor activity on improved memory andemotional well-being in elderly women

p. 20-32Este estudio investiga el efecto de diversos tipos de intervención (cognitiva versus cognitiva + motora versus no intervención) en la memoria y el estado de ánimo emocional en mujeres mayores con quejas de memoria y con una vida pasiva. Los sujetos (N=102, 80% mujeres, edad M/SD = 76/5 años) se distribuyeron de forma aleatoria en los tres grupos de tratamiento. El entrenamiento cognitivo consistió en ejercicios de atención, lenguaje, asociación de ideas y resolución de problemas. El entrenamiento motor consistió en ejercicios propioceptivos y dinámicos relacionados con el esquema corporal, el equilibrio y la coordinación de movimientos. La intervención se llevó a cabo durante 8 meses. Se aplicaron el Test Conductual de Memoria Rivermead (RBMT) y la Escala Geriátrica de Depresión de Yesavage (GDS) antes y después. Los resultados demuestran mejorías asociadas a ambas intervenciones y deterioro en el grupo de control. Sin embargo, sólo el grupo de intervención cognitiva-motora muestra una mejoría relevante según las pruebas citadas. Los resultados sugieren que la intervención combinada cognitiva-motora es más prometedora que la intervención simplemente cognitiva para mejorar la función de la memoria y del estado de ánimo en mujeres con pérdidas de memoria subjetivas, y que las dos son eficaces en comparación con la no intervenciónS

CO2 footprint reduction and efficiency increase using the dynamic rate in overhead power lines connected to wind farms

Since the first wind farms began operating in the early 1980s, several important factors have changed in the overall picture of energy politics worldwide. The total renewable wind energy capacity of Spain currently accounts for more than 20% of the total installed capacity, which makes integration into the grid challenging for wind farm owners as well as electricity transportation and distribution companies. The smart-grid concept, which focuses on real-time monitoring and dynamic rating operation of power lines, is an important component in the solution to these new challenges. This paper explains how a more efficient operation of energy-generating activities via dynamic rating of the electric grid due to a better knowledge of the main parameters contributes to more clean, renewable energy and decreases the CO2 footprint. The dynamic rating operation of a Spanish overhead power line is analysed, and different scenarios are studied. The dynamic rate achieved in 2015 has saved more than 1100 tonnes of CO2 and has generated over 240,000 € of extra income. This dynamic rating operation also increased the actual annual energy generated from 231.5 GW h to 834.7 GW h with only a 2% greater loss along the line due to Joule and magnetic effects.This work was supported by the Spanish Government under the R+D initiative INNPACTO with reference IPT-2011-1447-920000, the Spanish R+D initiative with reference ENE-2013-42720-R and RETOS RTC-2015-3795-3. The authors also acknowledge support from Viesgo

The tourist demand of the hotel chain. Time series for a forecast model

Fil: Fernández López, Reinier. University of Pinar del Río Hermanos Saíz Monte de Oca; Cuba.Fil: Vilalta Alonso, José Alberto. Technological University of Havana José Antonio Echeverría; Cuba.Fil: Quintero Silverio, Arely. University of Pinar del Río Hermanos Saíz Monte de Oca; Cuba.Fil: Díaz González, Ledy. University of Pinar del Río Hermanos Saíz Monte de Oca; Cuba.In an increasingly uncertain world where world dynamics accelerates the way of managing processes in any sector, the forecast of tourist demand becomes very important. In this sense, the present research aims to forecast the tourist demand of the Cuban Hotel Chain of Pinar del Río, Cuba, until December 2019, through the use of time series techniques, which facilitate planning and decision-making. in this sector and in this way work towards the achievement of an integration in the productive chains, considering that tourism is one of the socioeconomic activities that activates many other sectors of production and services, as well as predicting the behavior of tourism. For this, the quantitative research method was used as the guiding method, based on the Box - Jenkins methodology and the Holt - Winters exponential smoothing method. It is also possible to characterize tourism management taking into consideration two indicators: cost per weight and average income per tourist, referring to efficiency and effectiveness respectively. In addition, a multivariate analysis of time series was carried out that made it possible to characterize the tourist activity in four fundamental stages in the hotel chain taken as the object of study

La calidad de los datos y las decisiones empresariales

In this paper it is commented of the paper of the data like support of the decisions that the directive make and as important resource of the company. So that the decisions are objective it is not enough they take based on the data but rather, also, these they should have the appropriate quality, what means that they are adapted to the use that they are sought to give. Reference is made to the effect that it has more than enough the economy, image and prestige of the organizations has the poor data quality, to the multidimensional character of the data quality and the necessity of taking initiatives that allow to solve these problems that are presented in this field.En este trabajo se comenta del papel de los datos como soporte de las decisiones que toman los directivos y como importante recurso de la empresa. Para que las decisiones sean objetivas no basta con que se tomen basadas en los datos sino que, además, estos deben tener la calidad adecuada, lo que significa que sean adecuados al uso que se les pretendedar. Se hace referencia al efecto que sobre la economía, imagen y prestigio de las organizaciones tiene la mala calidad de los datos, al carácter multidimensional de la calidad de los datos y a la necesidad de acometer iniciativas que permitan resolver los problemas que se presentan en este campo