Encontrados 955602 resultado(s)
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Encontradas 9557 página(s)
Analysis of wave resonant effects in-between offshore vessels arranged side-by-side
Repositorio: Archivo Digital UPM
Dinoi, Pasquale
La predicción de la interacción hidrodinámica entre dos cuerpos flotantes en la configuración side-by-side (lado-a-lado) se ha convertido en un importante y complicado problema en los últimos años. Esta situación es relevante cuando se trata de tomar decisiones sobre la viabilidad de una serie de operaciones offshore, principalmente relacionadas con el proceso de transferencia de carga líquida entre dos cascos. Esta tesis se profundiza en algunos aspectos hidrodinámico relevantes que surgen...
Ver en: https://oa.upm.es/43593/
Hydrological Drought Index Insurance for Irrigated Agriculture
Repositorio: Archivo Digital UPM
Maestro Villarroya, Teresa
Los riesgos de escasez de agua en sistemas de regadío son importantes en los países semi-áridos y es probable que aumenten debido al cambio climático. De ahí deriva el interés en ofrecer a los agricultores la posibilidad de proteger la estabilidad de los ingresos de las explotaciones de regadío frente a este riesgo. Debido a las dificultades que un seguro de este tipo presenta, solamente un país (Estados Unidos) ofrece esta cobertura bajo un seguro multi-riesgo. Sin embargo, la cobertura es muy...
Ver en: https://oa.upm.es/43595/
Estudio de audiometría para músicos
Repositorio: Archivo Digital UPM
Mawloud, Maarouf
In the following thesis, an acoustic study will be made to gather information concerning the induced hearing loss affecting musicians’ lives. An overall comparison between the types of hearing loss, its reasons and factors, will be studied to be able at the end to conclude ways of ear protection depending on the instrument played, practice
rooms and time spent playing the instrument.
This study will be like a manual to every musician whether he’s an amateur or a professional, it will focus more...
Ver en: https://oa.upm.es/43599/
Analysis of tether-mission concept for multiple flybys of moon Europa
Repositorio: Archivo Digital UPM
Sanmartín Losada, Juan Ramón, Charro, Mario, Garret, Henry B., Sánchez Arriaga, Gonzalo, Sánchez Torres, Antonio
All four giant planets, far from the Earth and sun and having deep gravitational wells, present propulsion and power mission issues, but they also have an ambient plasma and magnetic field that allows for a common mission concept. Electrodynamic tethers can provide propellantless drag for planetary capture and operation down the gravitational well, and they can generate power to use along with or be stored for inverting tether current. The design for an alternative to NASA’s proposed Europa...
Ver en: https://oa.upm.es/43606/
Two new types of visualization for mutualistic communities based in k-core decomposition
Repositorio: Archivo Digital UPM
García Algarra, Francisco Javier, Galeano, Javier, Pastor Ruiz, Juan Manuel
The bipartite graph is the most popular visualization of mutualistic networks. This plot underlines the existence of two guilds of nodes. Links between them are di?cult to follow even with a reduced number of elements, and it is almost impossible to discover organizational patterns. As a result, it is uncommon ?nding graphs of big bipartite networks in the literature. These shortcomings are even worse for networks with real time, strongly non linear interactions, such as mutualistic newtorks....
Ver en: https://oa.upm.es/43609/
QuadLab: A Project-Based Learning Toolkit for Automation and Robotics Engineering Education
Repositorio: Archivo Digital UPM
Zapata, David, Garzón Oviedo, Mario Andrei, Pereira Valente, Joao Ricardo, Barrientos Cruz, Antonio
It is frequently claimed that the students must have an active role in building and transforming their own knowledge, and the teacher's labor is to provide the students the necessary tools in order to reach specific learning objectives, included in a course program. This paper presents an aerial robotic system as a toolkit, and proposes a series of activities focused on the learning in automation and robotics. These proposed activities have been designed based upon the project-based...
Ver en: https://oa.upm.es/43611/
A detailed analysis of the energy levels configuration existing in the band gap of supersaturated silicon with titanium for photovoltaic applications
Repositorio: Archivo Digital UPM
Pérez, E., Dueñas, S., Castán Lanaspa, Helena, Bailón Vega, Luis Alberto, Montero, D., García Hernánsanz, Ramiro, García Hemme, Eric, Olea, J., González Díaz, Germán
The energy levels created in supersaturated n-type silicon substrates with titanium implantation in the attempt to create an intermediate band in their band-gap are studied in detail. Two titanium ion implantation doses (1013cm-2 and 1014cm-2) are studied in this work by conductance transient technique and admittance spectroscopy. Conductance transients have been measured at temperatures of around 100 K. The particular shape of these transients is due to the formation of energy barriers in the...
Ver en: https://oa.upm.es/43612/
The Manifesto & the Hammer. A Review on How Contemporary Architecture Theories are being built
Repositorio: Archivo Digital UPM
Villanueva Cajide, Beatriz
When Panayotis Tournikiotis wrote Historiography of Modern Architecture in 1999 it started to be obvious the strategies the theorists of architecture have followed to present the words of the so-called pioneers of the Modernity as a kind of consistent discourse that eventually never existed. On top of that, if we see the original writings of those architects we will find that, in most cases, they use the format of a Manifesto - probably influenced by the Avant-Garde artistic movements from the...
Ver en: https://oa.upm.es/43613/
A model for the simulation of energy gains when using distributed maximum power point tracking (DMPPT) in photovoltaic arrays
Repositorio: Archivo Digital UPM
Solorzano del Moral, Jorge, Masa Bote, Daniel, Egido Aguilera, Miguel Ángel, Caamaño Martín, Estefanía
Over the past years, the photovoltaic (PV) market has been invaded with numerous power optimizers and micro-inverters that claim large energy gains when used in PV generators with shading or module mismatch. These products provide distributed maximum power point tracking (DMPPT), normally at module level, allowing the maximum power to be extracted from each PV module. This topology can be beneficial in situations where the PV generator is shaded or when there is large module mismatch. However,...
Ver en: https://oa.upm.es/43614/
Photovoltaic systems with and without radiation concentrators for temperate and tropical regions
Repositorio: Archivo Digital UPM
Reis Reis de Souza Sant’Anna, Vania, Oliveira Filho, Delly, Egido Aguilera, Miguel Ángel, Ribeiro, Aristides, Lacerda Filho, Adílio Flauzino, Fonseca Ferreira, Augusto Cesar
The industrial development of solar photovoltaic technology has attracted investors and influenced governments to establish public policies for the sector. The present research consisted of studying, building and testing low concentration solar radiation systems for photovoltaic energy conversion. The study used optical nonimaging parameters for the V- trough type radiation concentrator constructed of anodized aluminum, to reflect and to cool. Designed to concentrate radiation by about two...
Ver en: https://oa.upm.es/43616/
Second international spectroradiometer intercomparison: results and impact on PV device calibration
Repositorio: Archivo Digital UPM
Galleano, Roberto, Zaaiman, W., Strati, Cecilia, Bartocci, Simona, Pravettoni, Mauro, Marzoli, Mateo, Fucci, Raffaele, Leanza, Gianni, Timò, Gianluca, Minuto, Alessandro, Catena, Mario, Aleo, Francesco, Takagi, S., Akiyama, A., Núñez Júdez, Rubén, Belluardo, Giorgio
This paper describes the results of an intercomparison of spectroradiometers for measuring global normal incidence and direct normal incidence spectral irradiance in the visible and in the near infrared, together with an assessment of the impact these results may have on the calibration of the short circuit current (I-sc) of triple-junction photovoltaic devices and on the relevant spectral mismatch calculation. The intercomparison was conducted by six European scientific laboratories and a...
Ver en: https://oa.upm.es/43617/
Solar irradiation and PV module temperature dispersion at a large-scale PV plant
Repositorio: Archivo Digital UPM
García, Miguel, Marroyo, Luis, Lorenzo Pigueiras, Eduardo, Marcos Álvarez, Javier, Pérez, Miguel
When evaluating the performance of a photovoltaic (PV) system, it is extremely important to correctly measure the plant operating conditions: incident irradiation and cell temperature. At large-size PV plants, the possible dispersion of the plant operating conditions may affect the representativeness of the values measured at one single point. The available literature contains many observations on irradiance dispersion (typically associated to high temporal resolution experiments) and its...
Ver en: https://oa.upm.es/43620/
Luminous and solar characterization of PV modules for building integration
Repositorio: Archivo Digital UPM
Moralejo Vázquez, Francisco José, Martín-Chivelet, N., Olivieri, Lorenzo, Caamaño Martín, Estefanía
The optical characterization of different PV modules for integration in buildings (BIPV) is presented in this paper. The investigated PV modules are laminated glasses (PV laminates) suitable for integration in façades and windows. They are made of different PV cell technologies and some of them present a certain transparency degree, making possible to combine daylighting properties with solar control and electrical generation. The approach is based on spectral UV/vis/NIR reflectance and...
Ver en: https://oa.upm.es/43622/
Automated axial right ventricle to left ventricle diameter ratio computation in computed tomography pulmonary angiography
Repositorio: Archivo Digital UPM
Rodríguez López, Sara, Jiménez Carretero, Daniel, San José Estépar, Raúl, Ledesma Carbayo, María Jesús, Gonzalez*, German, Kumamaru, Kanako, J. Rybicki, Frank
Automated medical image analysis requires methods to localize anatomic structures in the presence of normal interpatient variability, pathology, and the different protocols used to acquire images for different clinical settings. Recent advances have improved object detection in the context of natural images, but they have not been adapted to the 3D context of medical images. In this paper we present a 2.5D object detector designed to locate, without any user interaction, the left and right...
Ver en: https://oa.upm.es/43624/
Detecting specific oscillatory regimes in the dynamics of erbium-doped fiber laser
Repositorio: Archivo Digital UPM
Zhuravlev, Maxim O., Koronovskii, Alexey A., Moskalenko, Olga I., Pisarchik, Alexander N., Rider, D. R., Hramov, Alexander E.
A method for determining the oscillatory mode occurring in an erbiumdoped fiber laser with a modulated parameter is proposed. The method is based on using a continuous wavelet transform with a mother Morlet wavelet and analyzing the energy of the wavelet spectrum that corresponds to the relevant range of time scales.
Ver en: https://oa.upm.es/43625/
Deterministic coherence resonance in coupled chaotic oscillators with frequency mismatch
Repositorio: Archivo Digital UPM
Pisarchik, Alexander N., Jaimes-Reategui, Rider
A small mismatch between natural frequencies of unidirectionally coupled chaotic oscillators can induce coherence resonance in the slave oscillator for a certain coupling strength. This surprising phenomenon resembles “stabilization of chaos by chaos,” i.e., the chaotic driving applied to the chaotic system makes its dynamics more regular when the natural frequency of the slave oscillator is a little different than the natural frequency of the master oscillator. The coherence is characterized...
Ver en: https://oa.upm.es/43626/
How to resist synchronization attacks
Repositorio: Archivo Digital UPM
Pisarchik, Alexander N., Jiménez Rodríguez, Maricela, Jaimes-Reátegui, Rider
Conventional synchronization-based chaotic communication is vulnerable to synchronization attacks enable to recuperate system parameters. However, it is possible to make these attacks inefficient. The simple way to resist synchronization attacks is to change a parameter of the master system faster than the time needed for the system to synchronize. To verify this idea we construct a hybrid communication system composed of two chaotic Rössler oscillators and the chaotic logistic map. The latter...
Ver en: https://oa.upm.es/43628/
Implementation and performance of automated software to compute the RV/LV diameter ratio from CT pulmonary angiography images
Repositorio: Archivo Digital UPM
Kumamaru, Kanako, George, Elizabeth, Aghayev, Ayaz, Saboo, Sachin S., Khandelwal, Ashish, Rodríguez López, Sara, Cai, Tianrun, Jiménez Carretero, Daniel, San José Estépar, Raúl, Ledesma Carbayo, María Jesús, González, Germán, Rybicki, Frank J.
Objective: The aim of this study was to prospectively test the performance and potential for clinical integration of software that automatically calculates the right-to-left ventricular (RV/LV) diameter ratio from computed tomography pulmonary angiography images.
Methods: Using 115 computed tomography pulmonary angiography images that were positive for acute pulmonary embolism, we prospectively evaluated RV/LV ratio measurements that were obtained as follows: (1) completely manual measurement (...
Ver en: https://oa.upm.es/43630/
Interactive management control via analytic hierarchy process: an empirical study in a public university hospital
Repositorio: Archivo Digital UPM
Vanzanella, Carmela, Fico, Giuseppe, Arredondo Waldmeyer, María Teresa, Delfino, Roberto, Viggiani, Vincenzo, Triassi, Maria, Pecchia, Leandro
This paper describes an application of analytic hierarchy process (AHP) to enhance interactive budgeting in one of the biggest public university hospitals in Italy. AHP improved budget allocation facilitating elicitation and formalisation of units' needs. Furthermore, AHP facilitated vertical communication among managers and stakeholders, as it allowed multilevel hierarchical representation of hospital needs, and horizontal communication among staff of the same hospital, as it allowed...
Ver en: https://oa.upm.es/43631/
Predicting recurring concepts on data-streams by me ans of a meta-model and a fuzzy similarity function
Repositorio: Archivo Digital UPM
Abad Arranz, Miguel Ángel, Gomes, João Bartolo, Menasalvas Ruiz, Ernestina
Meta-models can be used in the process of enhancing the drift detection mechanisms used by data stream algorithms, by representing and predicting when the change will occur. There are some real-world situations where a concept reappears, as in the case of intrusion detection systems(IDS), where the same incidents or an adaptation of them usually reappear over time. In these environments the early prediction of drift by means of a better knowledge of past models can help to anticipate to the...
Ver en: https://oa.upm.es/43634/
Resting tremor classification and detection in Parkinson's disease patients
Repositorio: Archivo Digital UPM
Cámara Nuñez, Carmen, Isabi, Pedro, Warwic, Kevin, Ruiz, Virginie, Aziz, Tipu, Stein, John, Bakstein, Eduard
Parkinson is a neurodegenerative disease, in which tremor is the main symptom. This paper investigates the use of different classification methods to identify tremors experienced by Parkinsonian patients. Some previous research has focussed tremor analysis on external body signals (e.g., electromyography, accelerometer signals, etc.). Our advantage is that we have access to sub-cortical data, which facilitates the applicability of the obtained results into real medical devices since we are...
Ver en: https://oa.upm.es/43635/
Altered functional connectivity in essential tremor
Repositorio: Archivo Digital UPM
Benito León, Julián, Louis, Elan D., Romero Muñoz, Juan Pablo, Hernández Tamames, J.A., Manzanedo Sáenz, Eva, Álvarez Linera, Juan, Bermejo Pareja, Félix, Posada Rodríguez, Ignacio Javier, Rocón de Lima, Eduardo
Essential tremor (ET) has been associated with a spectrum of clinical features, with both motor and nonmotor elements, including cognitive deficits. We employed resting-state functional magnetic resonance imaging (fMRI) to assess whether brain networks that might be involved in the pathogenesis of nonmotor manifestations associated with ET are altered, and the relationship between abnormal connectivity and ET severity and neuropsychological function. Resting-state fMRI data in 23 ET patients (...
Ver en: https://oa.upm.es/43639/
Artificial cognitive control with self-x capabilities: A case study of a micro-manufacturing process
Repositorio: Archivo Digital UPM
Haber Guerra, Rodolfo E., Juanes Rodríguez, Carmelo, Toro Matamoros, Raúl Mario del, Beruvides López, Gerardo
Nowadays, even though cognitive control architectures form an important area of research, there are many constraints on the broad application of cognitive control at an industrial level and very few systematic approaches truly inspired by biological processes, from the perspective of control engineering. Thus, our main purpose here is the emulation of human socio-cognitive skills, so as to approach control engineering problems in an effective way at an industrial level. The artificial cognitive...
Ver en: https://oa.upm.es/43641/
One central oscillatory drive is compatible with experimental motor unit behaviour in essential and Parkinsonian tremor
Repositorio: Archivo Digital UPM
Dideriksen, Jacob L., Gallego Juárez, Juan Antonio, Holobar, Ales, Rocón de Lima, Eduardo, Pons Rovira, José Luis, Farina, Darío
Pathological tremors are symptomatic to several neurological disorders that are difficult to differentiate and the way by which central oscillatory networks entrain tremorogenic contractions is unknown. We considered the alternative hypotheses that tremor arises from one oscillator (at the tremor frequency) or, as suggested by recent findings from the superimposition of two separate inputs (at the tremor frequency and twice that frequency). Approach. Assuming one central oscillatory network we...
Ver en: https://oa.upm.es/43642/
Influence of common synaptic input to motor neurons on the neural drive to muscle in essential tremor
Repositorio: Archivo Digital UPM
Gallego Juárez, Juan Antonio, Dideriksen, Jacob L., Holobar, Ales, Ibañez Pereda, Jaime, Pons Rovira, José Luis, Louis, Elan D., Rocón de Lima, Eduardo, Farina, Darío
Tremor in essential tremor (ET) is generated by pathological oscillations at 4 to 12 Hz, likely originating at cerebello-thalamo-cortical pathways. However, the way in which tremor is represented in the output of the spinal cord circuitries is largely unknown because of the difficulties in identifying the behavior of individual motor units from tremulous muscles. By using novel methods for the decomposition of multichannel surface EMG, we provide a systematic analysis of the discharge...
Ver en: https://oa.upm.es/43643/
Relative fascicle excursion effects on dynamic strength generation during gait in children with cerebral palsy
Repositorio: Archivo Digital UPM
Martín Lorenzo, Teresa, Lerma Lara, Sergio, Martínez Caballero, Ignacio, Rocón de Lima, Eduardo
Evaluation of muscle structure gives us a better understanding of how muscles contribute to force generation which is significantly altered in children with cerebral palsy (CP). While most muscle structure parameters have shown to be significantly correlated to different expressions of strength development in children with CP and typically developing (TD) children, conflicting results are found for muscle fascicle length. Muscle fascicle length determines muscle excursion and velocity, and...
Ver en: https://oa.upm.es/43645/
Early detection of Heart Failure exacerbation by telemonitoring in old people
Repositorio: Archivo Digital UPM
Villalba Mora, Elena, Petidier-Torregrossa, Roberto, Alonso-Bouzón, Cristina, Carnicero-Carreño, José Antonio, Rodríguez Mañas, Leocadio
Around 10% of all persons over 70 years of age suffer heart failure in Spain. This is the most common cause of hospitalization amongst patients aged 65 years and over, being the third leading cause of cardiovascular mortality. Although some works have demonstrated that the use of telemedicine in the monitoring after discharge has improved the rates of readmission in patients with heart failure, there are no many works focused on older people, which represents a population with special clinical...
Ver en: https://oa.upm.es/43646/
Towards efficient flight: insights on proper morphing-wing modulation in a bat-like robot
Repositorio: Archivo Digital UPM
Colorado, Julián, Rossi, Claudio, Zhang, Chao, Barrientos Cruz, Antonio
In this article, we address the question of how the flight efficiency of Micro Aerial Vehicles with variable wing geometry can be inspired by the biomechanics of bats.We use a bat-like drone with highly articulated wings using shape memory alloys (SMA) as artificial muscle-like actuators. The possibility of actively changing the wing shape by controlling the SMA actuators, let us study the effects of different wing modulation patterns on lift generation, drag reduction, and the energy cost of a...
Ver en: https://oa.upm.es/43650/
A binomial stochastic simulated study of mutualism
Repositorio: Archivo Digital UPM
García Algarra, Francisco Javier, Galeano, Javier, Pastor Ruiz, Juan Manuel, Iriondo, José María, Ramasco, Juan José
Mutualism is the interaction between two species that results benefitial for both. Mutualistic communities have an internal structure of bipartite network, with a property called nestedness that makes them quite resilient. Research has focused on stability to explain the reasons of this effect but dynamics is less well understood. Theoretical models are modifications of the classical logistic equation with addition l terms to take into account intraspecies interactions, but they are not fully...
Ver en: https://oa.upm.es/43652/
Active photonic integrated circuits modulated by LCs
Repositorio: Archivo Digital UPM
Caño García, Manuel, Ye, Fangliang, Gordo, Fernando, Geday, Morten Andreas, Otón Sánchez, José Manuel, Quintana, Xavier
A photonic integrated circuit (PIC) or integrated optical circuit is a device that integrates multiple (at least two) photonic functions, being as such similar to electronic integrated circuits. The connections between components are made of light waveguides; these can be active themselves ?i.e., light paths can be externally controlled? by using electrooptic (EO) materials within or onto the light path. The likelihood of liquid crystals to become EO materials for active waveguides in PICs has...
Ver en: https://oa.upm.es/43671/
Polarization dependent photonic liquid crystal fiber tunable interferometer
Repositorio: Archivo Digital UPM
Poudereux Sánchez, David, Caño García, Manuel, Geday, Morten Andreas, Quintana, Xavier, Otón Sánchez, José Manuel
The Polarization Maintaing Photonic Crystal Fiber PM-1550-01 has been employed to create intermodal interferometers by splicing short (cm) portions of PCF between two single mode fiber (SMF) pigtails and PANDA fibers. It has been shown that this setup generates a intermodal interferometer. The interferometers have been made tunable by the inclusion of liquid crystal inside the PCF portion.
Ver en: https://oa.upm.es/43672/
Detection of microbes using flowing lyotropic liquid crystals
Repositorio: Archivo Digital UPM
Geday, Morten Andreas, Caño García, Manuel, Escolano, José Miguel, Otón Martínez, Eva, Otón Sánchez, José Manuel, Quintana, Xavier
Microbial contamination of food, water and even air supply is a permanent threat against the health of humans and livestock. This threat is particularly serious in contexts such as hospitals (Legionella contamination of air-conditioning) and in extreme situations, such as those met in the third world and in natural crisis situations where water contamination is one of the most serious risks to human wellbeing.
Ver en: https://oa.upm.es/43673/
Light coupling and performance of LC modulated photonic integrated circuits
Repositorio: Archivo Digital UPM
Caño García, Manuel, Poudereux Sánchez, David, Geday, Morten Andreas, Otón Sánchez, José Manuel, Quintana, Xavier
Coupling light into a photonic integrated circuit (PIC) is usually the most challenging task to characterize these circuits. PIC connections between components are made of light waveguides whose section is often of the same order as light wavelength, i.e., 1-5 ?m or even less. Waveguides may become active by inserting additional layers of electrooptic materials [1], either as a component within the light path, or deposited onto the waveguide affecting the evanescent field of the guided light....
Ver en: https://oa.upm.es/43674/
Photonic crystal fibers infiltrated with metallic nanoparticles dispersed in polydimethylsiloxane
Repositorio: Archivo Digital UPM
Budaszewski, Daniel, Poudereux Sánchez, David, Caño García, Manuel, Woliński, Tomasz R., Otón Sánchez, José Manuel
An experimental results on birefringent photonic crystal fiber (PCF) selectively infiltrated with metallic nanoparticles (NPs) dispersed in polydimethylsiloxane (PDMS) are presented. In general, PCFs are structures consisting of periodic matrix of microholes surrounding core region, that can be either solid or hollow.
Ver en: https://oa.upm.es/43675/
Technological and conceptual leaps on bridges: leading sector of technological experimentation during the last two centuries
Repositorio: Archivo Digital UPM
Humanes Cisnal, Alberto
Durante los dos últimos siglos la arquitectura ha sufrido una revolución resolutiva, surgida primeramente a las capacidades de los nuevos materiales. Así la introducción del hierro llevó asociada la capacidad para soportar tracciones, lo que modificó las reglas resistentes. Si se desean encontrar las claves para el entendimiento de las grandes luces en arquitectura, es necesario ver la evolución asociada a la construcción de puentes, ya que es el ámbito extremo en el que se superan las...
Ver en: https://oa.upm.es/43676/
2-D and 3-D TCAD simulations of defect-tolerant solar cell architectures
Repositorio: Archivo Digital UPM
Berney Needleman, David, Wagner, Hannes, Altermatt, Pietro P., Cañizo Nadal, Carlos del, Buonassisi, Tonio
We use 2-D and 3-D TCAD simulations in Sentaurus Device to determine the injection-dependent device performance impacts of point defects (e.g., Fei) and extended defects (e.g., grain boundaries). We identify features of device design that contribute to defect tolerance.
Ver en: https://oa.upm.es/43680/
A modular middleware approach for exergaming
Repositorio: Archivo Digital UPM
Eckert, Martina, Gómez Martinho, Ignacio, Meneses Chaus, Juan Manuel, Martínez Ortega, José Fernán
This paper presents the design of a new exergaming environment consisting of a modular middleware tool aimed at serving for intelligent adventure games. The middleware provides a modular and user-adaptive interface for data exchange between different devices (to date it supports a motion capture camera, a mobile phone, and a VR headset) and Blender. The target group is formed by young people between ages 6 to 26 with different physical diseases (muscular dystrophy, cerebral palsy, accidents,...
Ver en: https://oa.upm.es/43682/
Fast facial expression recognition for emotion awareness disposal
Repositorio: Archivo Digital UPM
Eckert, Martina, Gil Gaitán, Almudena, Zapatero Olmedillo, Diego, Meneses Chaus, Juan Manuel, Martínez Ortega, José Fernán
This paper presents a simple and fast expression recognition algorithm aimed at running in a secondary plane to provide emotion awareness for primary applications as e.g. exergames, in real time. The algorithm is based on the extraction of 19 facial landmarks which are used to detect some of the Action Units (AUs) defined in the Facial Action Coding System (FACS) and a newly created one. In addition, the new concept of Combined Action Units (CAUs) is presented. Those are grouped AUs which are...
Ver en: https://oa.upm.es/43683/
G-Value Indoor characterization of semi-transparent photovoltaic elements for building integration: New equipment and methodology
Repositorio: Archivo Digital UPM
Olivieri, Lorenzo, Frontini, F., Polo López, Cristina Silvia, Pahud, D., Caamaño Martín, Estefanía
Whereas the modern architecture trends to an extensive use of glazing elements, buildings are increasingly required to minimize the external energy demand, cutting down the energy needed and covering the residual demand using local energy generation solutions. In this context, the integration of optimized Semi- Transparent Photovoltaic (STPV) elements seems to present a promising energy saving potential, leading to significant reductions of the heating, cooling and lighting loads while the on-...
Ver en: https://oa.upm.es/43684/
Performance of distributed PV in the UK: a statistical analysis of over 7000 systems
Repositorio: Archivo Digital UPM
Taylor, Jamie, Leloux, Jonathan, Hall, Lisa M.H, Everard, Aldous M., Briggs, Julian, Buckley, Alastair
In June 2015, the UK fleet of solar photovoltaic (PV) systems reached 7.8 GWp of capacity, but there are wide gaps in our understanding of the performance of these systems, which has lead to the conservative limit of 10 GWp being imposed on UK PV capacity by the Department of Energy and Climate Change. Here we present the results of a statistical analysis of real world UK PV systems which donate data to the Microgen Database, of which there are over 7000. The mean yearly-integrated Performance...
Ver en: https://oa.upm.es/43685/
Using a nonparametric PV model to forecast AC power output of PV plants
Repositorio: Archivo Digital UPM
Almeida, Marcelo Pinho, Perpiñan Lamigueiro, Oscar, Narvarte Fernández, Luis
In this paper, a methodology using a nonparametric model is used to forecast AC power output of PV plants using as inputs several forecasts of meteorological variables from a Numerical Weather Prediction (NWP) model and actual AC power measurements of PV plants. The methodology was built upon the R environment and uses Quantile Regression Forests as machine learning tool to forecast the AC power with a confidence interval. Real data from five PV plants was used to validate the methodology, and...
Ver en: https://oa.upm.es/43686/
Validation of energy management strategies for a BIPV system with a lithium ion battery demonstrator
Repositorio: Archivo Digital UPM
Fialho, Luis, Fartaria, Tomás, Collares Pereira, Manuel, Makibar Puente, Aitor
Study of grid interface in rooftop PV systems with energy storage. The specific objective for this energy strategy is to maximize the consumption of locally produced PV power, hence minimizing the injection of power into the electrical grid.
Ver en: https://oa.upm.es/43688/
Validation of energy management strategies for a BIPV system with a Vanadium Redox Flow Battery Demonstrator
Repositorio: Archivo Digital UPM
Fialho, Luis, Fartaria, Tomás, Collares Pereira, Manuel
Study of grid interface in rooftop PV systems with energy storage. The specific objective for this energy strategy is to maximize the consumption of locally produced PV power, hence minimizing the injection of power into the electrical grid.
Ver en: https://oa.upm.es/43691/
Implementation and validation of a self-consumption maximization energy management strategy in a Vanadium Redox Flow BIPV demonstrator
Repositorio: Archivo Digital UPM
Fialho, Luis, Fartaria, Tomás, Narvarte Fernández, Luis, Collares Pereira, Manuel
This paper presents the results of the implementation of a self-consumption maximization strategy tested in a real-scale Vanadium Redox Flow Battery (VRFB) (5 kW, 60 kWh) and Building Integrated Photovoltaics (BIPV) demonstrator (6.74 kWp). The tested energy management strategy aims to maximize the consumption of energy generated by a BIPV system through the usage of a battery. Whenever possible, the residual load is either stored in the battery to be used later or is supplied by the energy...
Ver en: https://oa.upm.es/43692/
Use of PV plants monitoring to characterize PV arrays power
Repositorio: Archivo Digital UPM
Carrillo Salinas, José Manuel, Martínez Moreno, Francisco
PV plants require a monitorization of their electrical parameters to achieve its best performance. Lately, it is more and more common that SCADA systems monitor currents and voltages even of every single string. These measurements which use to be stored instantaneously with a frequency like the one established on inverters and energy meters (usually each 10, 15, 20 or 60 minutes) are useful to detect faults. Unfortunately, it is not taken advantage of them to characterize the PV arrays. A...
Ver en: https://oa.upm.es/43694/
New tools and routines for ecotechnological slope stability analysis
Repositorio: Archivo Digital UPM
Tardío Cerrillo, Guillermo Gregorio
El uso de material vegetal vivo y materiales biodegradables en las obras de estabilización, control de erosión y, en general, restauración ecológica, incluyen en la fase diseño una serie de particularidades a las que la ingeniería civil tradicional no tiene que enfrentarse. Es precisamente esta característica la que está ralentizando la adopción de las técnicas de bioingeniería en el mundo de la obra civil y la geotecnia. La utilización de un lenguaje común entre el mundo de la restauración...
Ver en: https://oa.upm.es/43723/
Methodology to set the X-factor for price cap regulation in toll roads: validation for the case of Brazil
Repositorio: Archivo Digital UPM
Rodrigues Brochado, Mariana
A lo largo de las últimas décadas, el sector privado ha incrementado su participación en la
provisión de infraestructuras de transporte en todo el mundo. Este cambio ha resultado en
nuevos retos para los reguladores, incluido la definición del método de ajuste de tarifas. Por esta
razón, los métodos de regulación económica han hecho progresos sustanciales, con el objetivo
de obtener el máximo desempeño de los concesionarios.
El price cap es un mecanismo de regulación por incentivos para...
Ver en: https://oa.upm.es/43724/
Application of exercise testing in the diagnosis, prognosis, and treatment of patients with Pulmonary Hypertension
Repositorio: Archivo Digital UPM
Fuentes Sánchez, Darío
Background Recent developments have added exercise testing and training as part of the clinical practice in the diagnosis, treatment, and prognosis of diseased populations. Exercise testing has been used widely in cardiovascular disease and in some circumstances in pulmonary disease. Cardiopulmonary Exercise Testing has been used in the diagnosis and prognosis of pulmonary hypertension patients. However, no many studies have tried to evaluate functional capacity, explore prediction of...
Ver en: https://oa.upm.es/43727/
Probability Model Based Energy Efficient and Reliable Topology Control Algorithm
Repositorio: Archivo Digital UPM
Li, Ning, Martínez Ortega, José Fernán, López Santidrián, M. Lourdes, Meneses Chaus, Juan Manuel
TTopology control is an effective method for improving the performance of wireless sensor networks (WSNs). Many topology control algorithms can achieve high energy efficiency by dynamically changing the transmission range of nodes. However, these algorithms prefer to choose short multihop communication links rather than the long directly communication links which also energy efficient probabilistic. Note that these fact, in this paper, we propose a mathematic model to explore the probability...
Ver en: https://oa.upm.es/43732/
Impact of extended contact co-firing on multicrystalline silicon solar cell parameters
Repositorio: Archivo Digital UPM
Peral Boiza, Ana, Dastgheib-Shirazi, Amir, Fano, Vanesa, Jimeno, Juan Carlos, Hahn, Giso, Cañizo Nadal, Carlos del
During the temperature spike of the contact co-firing step in a solar cell process, it has been shown that the concentration of lifetime-killer dissolved metallic impurities increases, while adding an annealing after the spike getters most of the dissolved impurities towards the phosphorus emitter, where they are less detrimental. The contact co-firing temperature profile including the after-spike annealing has been called extended contact co-firing, and it has also been proposed as a means to...
Ver en: https://oa.upm.es/43733/
A comparison between analytical and numerical solutions of the Vlasov equation
Repositorio: Archivo Digital UPM
Sanmartín Losada, Juan Ramón
Ver en: https://oa.upm.es/43736/
Willis's sources on gothic vault construction
Repositorio: Archivo Digital UPM
Huerta Fernández, Santiago
Willis’s article “On the construction of the vaults of the Middle Ages” marked a turning point in the study of Gothic vaults. It is still today the best exposition of
the topic, a work to be studied with care by anyone wishing to know in depth how the cross-vaults of the Midle Ages were traced and built. Indeed, the word
“construction” has the two meanings: we “construct” (trace) a curve, say, an oval with compass and rule, and we “construct” (build) an oval arch made of stone
voussoirs with...
Ver en: https://oa.upm.es/43743/
Urban Renewal Versus Rehabilitation - Case of Fuencarral Social Housing Estates in Madrid
Repositorio: Archivo Digital UPM
Gallego Gamazo, Cristina
Nowadays, one of the main concerns in the urban agenda of the European Union and Member States is how to adopt an integrated approach to urban challenges and needs of the consolidated city, in particular, to address the complex condition of multi-deprived neighbourhoods. Beyond the strategic integrated approaches based on economic interests perceived within the European Union, the disadvantage condition of multi-deprived areas requires an active and consistent implication of the diversity of...
Ver en: https://oa.upm.es/43746/
Simple mathematical approach to solar cell/panel behavior based on datasheet information
Repositorio: Archivo Digital UPM
Pindado Carrion, Santiago, Cubas Cano, Javier
new explicit mathematical expression is used to describe the behavior of a photovoltaic device (solar cell/panel), that is, its I-V curve, based on the characteristic points normally included in the manufacturers’ datasheets. This expression consists of two simple equations, one for voltage levels lower than the voltage at the maximum power point, V < Vmp, and the other one for voltage levels above this point, V > Vmp. The first equation is defined with two of the three characteristic...
Ver en: https://oa.upm.es/43747/
Productivity and quality of dehesa pastures in relation to global change : increasing tropospheric ozone and nitrogen deposition
Repositorio: Archivo Digital UPM
Calvete Sogo, Hector
La contaminación atmosférica representa una amenaza para la biodiversidad en todo el mundo y en particular en el área mediterránea, donde con frecuencia se registran altas concentraciones de ozono (O3) troposférico y depósito de nitrógeno (N) atmosférico. Los pastos anuales mediterráneos se encuentran entre los ecosistemas de mayor importancia del sur de Europa debido a su gran biodiversidad y extensión. Estos pastos constituyen de forma mayoritaria el sotobosque de bosques perennes y de...
Ver en: https://oa.upm.es/43750/
New techniques and methods for cold chain monitoring and tracking in perishable products
Repositorio: Archivo Digital UPM
Badía Melis, Ricardo
En el sector agroalimentario resulta de gran importancia controlar la calidad y supervisar los productos hortofrutícolas durante su transporte, almacenamiento y distribución. El mayor reto es asegurar una cadena de frío continua desde el productor hasta el consumidor, para lo cual es preciso contar con sistemas y tecnología de monitorización y control adecuados, así como técnicas de registro y análisis de datos fiables. Actualmente la FAO (Food and Agriculture Organization) estima que un tercio...
Ver en: https://oa.upm.es/43773/
DC/DC Converter for aircraft applications: desingn space for interleaved triangular full bridge topology
Repositorio: Archivo Digital UPM
Pérez García, Pablo
The goal of this project is the analysis and design of a DC/DC converter for aircraft applications. This converter is part of the output of an isolated rectifier unit for the distribution of electric power inside the airplane.
This work is part of the research effort done by the Center of Industrial Electronics in Universidad Politécnica de Madrid (CEI-UPM), in the More Electric Aircraft (MEA) topic.
The system works as a rectifier of the current obtained at the turbines, the generator of the...
Ver en: https://oa.upm.es/43776/
Design methodology of a transformer with an integrated inductor for avionic applications
Repositorio: Archivo Digital UPM
López Pérez-Arroyo, Carlota
El propósito de este proyecto es explicar la metodología del diseño del transformador de un convertidor de corriente continua de alta potencia (10kW a 50kW). El ejemplo que se detalla en este documento está enfocado hacia aplicaciones aviónicas, lo cual añade dos nuevas restricciones al proceso de diseño. Estas son: el tamaño y peso del transformador y la temperatura de trabajo del mismo. La temperatura del transformador no debe variar demasiado ya que a la altura de trabajo hay poca presión y...
Ver en: https://oa.upm.es/43788/
Fleets of robots for environmentally-safe pest control in agriculture
Repositorio: Archivo Digital UPM
González de Santos, Pablo, Ribeiro Seijas, Ángela, Fernández Quintanilla, Cesar, López Granados, Francisca, Brandstoetter, Michael, Tomic, Slobodanka, Pedrazzi, Stefania, Peruzzi, Andrea, Pajares, Gonzalo, Kaplanis, George, Pérez Ruiz, Manuel, Valero Ubierna, Constantino, Cerro Giner, Jaime del, Vieri, Marco, Rabatel, Gilles, Debilde, Benoit
Feeding the growing global population requires an annual increase in food production. This requirement suggests an increase in the use of pesticides, which represents an unsustainable chemical load for the environment. To reduce pesticide input and preserve the environment while maintaining the necessary level of food production, the efficiency of relevant processes must be drastically improved. Within this context, this research strived to design, develop, test and assess a new generation of...
Ver en: https://oa.upm.es/43791/
Application surface of CPT, an advanced DInSAR displacement near Itoiz dam, Navarra, Spain
Repositorio: Archivo Digital UPM
Fernández, Jose, Arjona, Alicia, Prieto Morin, Juan Francisco, Santoyo, M.A., Seco, Andrés, Monells, D., Pallero, Jose L. G., Prieto, E., Luzón, F., Mallorquí, J.
Itoiz reservoir is located in Navarra, northern Spain, being a newly constructed gravity dam that stores the water from the Irati and the Urrobi rivers. The dam has a total height of 121 m, a total length of 525 m and a maximum water storage volume of 410 hm3. The aim of this work is to study the surface displacement field during the impoundment of the Itoiz water reservoir. Orbital SAR Differential Interferometry (DInSAR) techniques have been proven to be a useful and powerful tool in tectonic...
Ver en: https://oa.upm.es/43809/
Structure Characterization, Optical and Magnetic Properties of Silver Scheelite Double Tungstates/Molybdates and Perovskites Sr2LnSbO6 (Ln= La-Lu and Y)
Repositorio: Archivo Digital UPM
You, Chaoyu
El trabajo presentado en esta tesis describe la síntesis y caracterización de dos series de nuevos compuestos: dobles scheelitas y dobles perovskitas. El wolframato de cerio trivalente y plata, AgCe(WO4)2, que presenta la estructura scheelita, ha sido sintetizado por el método cerámico al aire, a pesar de la relativamente alta inestabilidad del estado trivalente del ion Ce en estas condiciones. Este comportamiento podría ser debido a las propiedades redox que presenta el Ag2O en la reacción de...
Ver en: https://oa.upm.es/43814/
Updating EN 301 549: cognitive accessibility
Repositorio: Archivo Digital UPM
Martínez Normand, Loïc
EN 301 549 is the European Standard that defines accessibility requirements for the public procurement of ICT. EN 301 549 includes some support for cognitive disabilities, but it was recognized that more work was needed to take into account the diversity of persons with cognitive disabilities, who may have limitations in one or more types of mental tasks such as conceptualizing, planning, remembering and understanding numbers and symbols. ETSI, the European Telecommunications Standards...
Ver en: https://oa.upm.es/43823/
Gypsum Waste Management in the European Union: Towards a Circular Economy for the Construction Sector
Repositorio: Archivo Digital UPM
Jiménez Rivero, Ana
The role of waste management in the circular economy has recently been highlighted by the European Commission, particularly in the Communication COM/2015/0614 “Closing the loop – An EU action plan for the Circular Economy”. Gypsum products are well suited for contributing to this challenge, because the raw material calcium sulphate dihydrate can repeatedly change its properties through a reversible hydration reaction. Moreover, the waste hierarchy is applied when these are recycled instead of...
Ver en: https://oa.upm.es/43833/
A new fuzzy ontology development methodology (FODM) proposal
Repositorio: Archivo Digital UPM
Li, Xin, Martínez Ortega, José Fernán, Rubio Cifuentes, Gregorio
There is an upsurge in applying fuzzy ontologies to represent vague information in the knowledge representation field. Current research in the fuzzy ontologies paradigm mainly focuses on developing formalism languages to represent fuzzy ontologies, designing fuzzy ontology editors, and building fuzzy ontology applications in different domains. Less focus falls on establishing a formal methodological approach for building fuzzy ontologies. Existing fuzzy ontology development methodologies, such...
Ver en: https://oa.upm.es/43846/
Design and Control of a Transformable Anthropoid Robot for Underwater Works
Repositorio: Archivo Digital UPM
Ejarque Rinaldini, Gonzalo
Los trabajos submarinos realizados en estructuras sumergidas requieren dispositivos para el manejo de equipos y herramientas tanto en aplicaciones offshore como de interior. Los vehículos submarinos teledirigidos se han utilizado durante décadas para realizar operaciones submarinas con cierto grado de telepresencia, utilizando uno o más manipuladores. Sin embargo, cuando las tareas se tornan complejas es necesaria la inmersión humana. Aparte de los riesgos para la salud relacionados con la...
Ver en: https://oa.upm.es/43855/
No tillage and sugar beet foam amendment enhanced micobial activity of degraded acidic soils in South West Spain
Repositorio: Archivo Digital UPM
León, Paloma, Espejo, R., Gómez Paccard, Clara, Hontoria Fernández, Chiquinquirá, Mariscal Sancho, Ignacio de Loyola, Renella, Giancarlo, Benito Capa, Marta
Ca-amendments are commonly applied to improve acid soils, whilst no-tillage (NT) has been widely recommended in soils where conventional tillage (CT) has led to losses of organic matter. However, the potential interactions between the two treatments are only partially known. Our study was conducted on a degraded soil located in SW Spain, in order to assess if the combination of Ca-amendment plus crop-tillage provides long term soil amelioration on microbial activity. To this end the effects of...
Ver en: https://oa.upm.es/43859/
Robustness of oscillatory behavior in correlated networks
Repositorio: Archivo Digital UPM
Sasai, Takeyuki, Morino, Kai, Tanaka, Gouhei, Almendral Sánchez, Juan Antonio, Aihara, Kazuyuki
Understanding network robustness against failures of network units is useful for preventing large-scale breakdowns and damages in real-world networked systems. The tolerance of networked systems whose functions are maintained by collective dynamical behavior of the network units has recently been analyzed in the framework called dynamical robustness of complex networks. The effect of network structure on the dynamical robustness has been examined with various types of network topology, but the...
Ver en: https://oa.upm.es/43860/
Editorial on "Multiplex networks: Structure, dynamics and applications"
Repositorio: Archivo Digital UPM
Boccaletti, Stefano, Criado, R., Benito Zafrilla, Rosa Maria, Losada González, Juan Carlos, Romance del Río, Miguel
There is a wide range of systems in the real world where components cannot function independently, so that these components interact with others through different channels of connectivity and dependencies. Complex Networks theory is, in fact, the formal tool for describing and analyzing fields as disparate as sociology (social networks, acquaintances or collaborations between individuals), biology (metabolic and protein networks, neural networks) or technology (phone call networks, computers in...
Ver en: https://oa.upm.es/43861/
Uniform families of minimal rational curves on Fano manifolds
Repositorio: Archivo Digital UPM
OcchettA, Gianluca, Solá Conde, Luis, Watanabe, KiwamU
It is a well known fact that families of minimal rational curves on rational homogeneous manifolds of Picard number one are uniform, in the sense that the tangent bundle to the manifold has the same splitting type on each curve of the family. In this note we prove that certain?stronger?uniformity conditions on a family of minimal rational curves on a Fano manifold of Picard number one allow to prove that the manifold is homogeneous.
Ver en: https://oa.upm.es/43864/
High speed rail and the tourism market: evidence from the Madrid case study
Repositorio: Archivo Digital UPM
Pagliara, Francesca, La Pietra, Andrea, Gómez Sánchez, Juan, Vassallo Magro, José Manuel
Marketing decisions and strategic planning of tourism provisions require improving the knowledge of factors affecting tourism demand, as well as making better forecasts of tourism flows in the short and long-term. In this respect, approaching how holidaymakers select their holiday destinations and investigating which factors determine their choices emerge as a key challenge. The aim of this paper is to analyze the role of High Speed Rail systems on destination choice, specifically on urban...
Ver en: https://oa.upm.es/43865/
Towards adaptation to climate change: water for rice in the coastal wetlands of Doñana, Southern Spain
Repositorio: Archivo Digital UPM
Iglesias Picazo, Ana Luisa, Sánchez Fernández, Berta, Garrote de Marcos, Luis, López, Iván
Rice production in coastal wetlands provides critical ecosystem services that range from flood control to wildlife habitat. In the Iberian Peninsula rice was introduced in the 10th Century. Today Iberian rice accounts for about one quarter of the total rice production of the European Union, almost exclusively cultivated in the coastal wetlands of Spain, with permanent flooding. The intensive water management required to produce rice stands at a crucial point since freshwater supply is...
Ver en: https://oa.upm.es/43867/
Accessibility and transport infrastructure improvement assessment: the role of borders and multilateral resistance
Repositorio: Archivo Digital UPM
Salas Olmedo, María Henar, García Alonso, Patricia, Gutiérrez Puebla, Javier
The market potential indicator is a commonly used tool in transport planning for evaluating
the potential economic effects derived from improvements in transport infrastructures.
The general assumption is that exports from a given region will rise with increased accessibility,
thus benefiting economic activities. However, the specification of the market
potential model is typically very simple and ignores both the impact of competing rivals
and the role of international borders, which leads to...
Ver en: https://oa.upm.es/43868/
Innovation in the European transport sector: a review
Repositorio: Archivo Digital UPM
Condeço Melhorado, Ana M., Wiesenthal, Tobias, Leduc, Guillaume
This article reviews innovation of the European transport industries. It combines a quantitative analysis of the R&D investment of manufacturers of transport equipment, transport service providers and the constructors of transport infrastructure for the years 2008 and 2011 with a qualitative assessment of their incentives to innovate. The latter takes into account sector-specific innovation systems, their distinct market environments and the products and services produced. The findings show...
Ver en: https://oa.upm.es/43869/
Experiences in social innovation: a platform for ethics through a school of engineering studies
Repositorio: Archivo Digital UPM
Martín Sanchez, Domingo Alfonso, García Laso, Ana
Convergence is an opportunity to determine the possibility to train students in social skills, assuming that our universities provide valuable training in specific technical and professional skills. This study presents the strategy followed in the Mines and Energy Engineering School of the Polytechnic University of Madrid (UPM from its name in Spanish) to enhance social learning through a program based on the assembly of training practices on Mentoring, Service Learning and social consciousness...
Ver en: https://oa.upm.es/43873/
Rat-strain dependent changes of dendritic and spine morphology in the hippocampus after cocaine self-administration
Repositorio: Archivo Digital UPM
Selvas, Abraham, Coria, Santiago M., Kastanauskaite, Asta, Fernaud Espinosa, Isabel, Felipe Oroquieta, Javier de, Ambrosio, Emilio, Miguens Vázquez, Miguel
We previously showed that cocaine self-administration increases spine density in CA1 hippocampal neurons in Lewis (LEW) but not in Fischer 344 (F344) rats. Dendritic spine morphology is intimately related to its function. Thus, we conducted a 3D morphological analysis of CA1 dendrites and dendritic spines in these two strains of rats. Strain-specific differences were observed prior to cocaine self-administration: LEW rats had significantly larger dendritic diameters but lower spine density than...
Ver en: https://oa.upm.es/43874/
Grape processing by high hydrostatic pressure: effect on use of non-Saccharomyces in must fermentation
Repositorio: Archivo Digital UPM
Bañuelos Bernabe, Maria Antonia, Loira, Iris, Escott, Carlos, Fresno, Juan Manuel del, Morata Barrado, Antonio, Sanz, Pedro D., Otero, Laura, Suarez Lepe, Jose Antonio
Vitis vinifera (variety Tempranillo) grapes were pressurized at 400 MPa by high hydrostatic pressure for 10 min and the effect on wild microbial populations, phenol extraction and wine composition was monitored. After treatment, the grapes were inoculated and fermented with Saccharomyces cerevisiae and several non-Saccharomyces yeasts: Schizosaccharomyces pombe, Torulaspora delbrueckii, Metschnikowia pulcherrima and Lachancea thermotolerans. S. pombe was used as sole fermentative yeast, but T....
Ver en: https://oa.upm.es/43879/
Security and privacy issues in implantable medical devices: A comprehensive survey
Repositorio: Archivo Digital UPM
Cámara Nuñez, Carmen, Peris-López, Pedro, Tapiador, Juan E.
Bioengineering is a field in expansion. New technologies are appearing to provide a more efficient treatment of diseases or human deficiencies. Implantable Medical Devices (IMDs) constitute one example, these being devices with more computing, decision making and communication capabilities. Several research works in the computer security field have identified serious security and privacy risks in IMDs that could compromise the implant and even the health of the patient who carries it. This...
Ver en: https://oa.upm.es/43888/
Use of Schizosaccharomyces strains for wine fermentation? Effect on the wine composition and food safety
Repositorio: Archivo Digital UPM
Mylona, A. E., Fresno, Juan Manuel del, Palomero, Felipe, Loira, Iris, Bañuelos Bernabe, Maria Antonia, Morata Barrado, Antonio, Calderón, F., Benito, S., Suarez Lepe, Jose Antonio
Schizosaccharomyceswas initially considered as a spoilage yeast because of the production of undesirable metabolites such as acetic acid, hydrogen sulfide, or acetaldehyde, but it currently seems to be of great value in enology.o ced Nevertheless, Schizosaccharomyces can reduce all of the malic acid in must, leading to malolactic fermentation. Malolactic fermentation is a highly complicated process in enology and leads to a higher concentration of biogenic amines, so the use of...
Ver en: https://oa.upm.es/43889/
Identifying ground-robot impedance to improve terrain adaptability in running robots
Repositorio: Archivo Digital UPM
Arévalo Martín, Juan Carlos, Sanz Merodio, Daniel, Cestari Soto, Manuel, García Armada, Elena
To date, running robots are still outperformed by animals, but their dynamic behaviour can be described by the same model. This coincidence means that biomechanical studies can reveal much about the adaptability and energy efficiency of walking mechanisms. In particular, animals adjust their leg stiffness to negotiate terrains with different stiffnesses to keep the total leg-ground stiffness constant. In this work, we aim to provide one method to identify ground-robot impedance so that control...
Ver en: https://oa.upm.es/43897/
Estimators of social awareness concerning the pollution crisis in the city of Madrid
Repositorio: Archivo Digital UPM
Vega-Penichet Andrada, Lucía
Numerosos estudios epidemiológicos han demostrado la relación entre la contaminación del aire y la mortalidad y morbosidad del ser humano. En Europa se estima que la contaminación es la causa de un 6% de las muertes. Aunque intuitivamente la contaminación se relacione principalmente con enfermedades del aparato respiratorio como el asma o la bronquitis, la literatura disponible demuestra que la contaminación influye en otros diagnósticos como enfermedades cardiovasculares, enfermedades del...
Ver en: https://oa.upm.es/43923/
Specifying Complex Missions for Aerial Robotics in Dynamic Environments
Repositorio: Archivo Digital UPM
Molina, Martin, Díaz Moreno, Adrian, Palacios, David, Suárez Fernández, Ramón, Sánchez López, José Luis, Sampedro Pérez, Carlos, Bavle, Hriday, Campoy Cervera, Pascual
To specify missions in aerial robotics, many
existing applications follow an approach based
on a list of waypoints, which has been proven
to be useful and practical in professional domains
(agriculture of precision, creation of terrain
maps, etc.). However this approach has limitations
to be used in other problems such as
the one defined in the IMAV 2016 competition
(e.g., a search and rescue mission). In this paper
we describe a language to specify missions for
aerial robotics that tries to...
Ver en: https://oa.upm.es/43926/
Desarrollo de procesos para formación de contactos con láser para módulos thin film CIGS para aplicaciones fotovoltaicas
Repositorio: Archivo Digital UPM
Chen, Yu
La metalización es un paso clave en la fabricación de células solares, además de ser el paso con mayor impacto en el precio final de la célula. Entre las técnicas de metalización usadas en la fabricación de células solares fotovoltaicas, la serigrafía es el método más ampliamente empleado. Es un sistema robusto y económico para la impresión de los dedos conductores en la industria fotovoltaica. Sin embargo, debido a las limitaciones de la técnica, difícilmente puede imprimir líneas de pasta de...
Ver en: https://oa.upm.es/43937/
Fission Chambers Designer Based On Monte Carlo Techniques Working in Current Mode And Operated in Saturation Regime
Repositorio: Archivo Digital UPM
Antolínez García, Alfonso
La cámara de fisión es un detector diseñado para la medida de flujos neutrónicos existentes en las instalaciones nucleares, así como la detección en las condiciones de irradiación de las mismas. Adicionalmente, permite la estimación del espectro neutrónico dentro del emplazamiento. El análisis de las señales eléctricas producidas por la cámara de fisión posibilita el cálculo de la potencia nuclear existente, la distribución de energía en la instalación, el nivel de daños en los materiales...
Ver en: https://oa.upm.es/43938/
Ruminal degradation of protein : implications for polluting emissions
Repositorio: Archivo Digital UPM
Vanegas Ruiz, Jorge Leonardo
Los rumiantes contribuyen a la emisión de gases de efecto invernadero, principalmente a través del metano (CH4) producido por la fermentación ruminal, que tiene un efecto invernadero entre 21 y 25 veces más potente que el CO2. Por esta razón, en los últimos años se han desarrollado numerosas investigaciones que se han centrado en el análisis de los factores dietéticos que afectan a la producción de este gas, si bien apenas se ha investigado el efecto de las características de las fuentes de...
Ver en: https://oa.upm.es/43942/
Desarrollo de una red simbiótica industrial en el puerto de Malmö
Repositorio: Archivo Digital UPM
Rouffiac, Ariane
La ciudad de Malmö (Suecia) tiene como objetivo reducir su impacto medioambiental y también el de desarrollar nuevas oportunidades de negocio en la parte Norte del puerto. Basándose en estos requerimientos, en este proyecto se estudiará el desarrollo de una red de industrias sostenibles. Además, con el objetivo de alcanzar una optimización de la energía y de los recursos, se aplicara el concepto de “Simbiosis Industrial”. Este concepto se refiere a que los sub-productos o flujos de calor...
Ver en: https://oa.upm.es/43956/
Instrumentation project of 3rd desalination plant at Tuas (Singapore)
Repositorio: Archivo Digital UPM
Charco Iniesta, Sara
This project consists on the description of instrumentation used in Tuas III desalination plant at Singapore and its flow process description.
The project has been developed as part of the work of the instrumentation department of the responsible company of the engineering design of Tuas III desalination plant.
First of all is important to know the water problems which suffer all the people who live in Singapore. Singapore is a city-state and is home to 5.5 million residents. The country has...
Ver en: https://oa.upm.es/43983/
Supercritical Steam Power Cycle For Line-Focusing Solar Power Plants
Repositorio: Archivo Digital UPM
Coco Enríquez, Luis, Muñoz Antón, Javier, Martínez-Val Peñalosa, José María
A recent study between Sandia National Laboratories and Siemens Energy, Inc., published on March 2013 [11], confirmed the feasibility of adapting the Siemens turbine SST-900 for supercritical steam in concentrated solar power plants, with a live steam conditions 230-260 bar and output range between 140-200 MWe. In this context, this analysis is focused on integrating a linefocus solar field with a supercritical Rankine power cycle. For this purpose two heat transfer fluids were assessed: direct...
Ver en: https://oa.upm.es/43993/
Dual Loop Line-Focusing Solar Power Plants with Supercritical Brayton Power cycles
Repositorio: Archivo Digital UPM
Coco Enriquez, Luis, Muñoz Antón, Javier, Martínez-Val Peñalosa, José María
Most of the deployed commercial line-focusing solar power plants with Parabolic Troughs (PTC) or Linear Fresnel (LF) solar collectors and Rankine power cycles use a Single Loop Solar Field (SF), Configuration 1 illustrated in Fig. 2, with synthetic oil as Heat Transfer Fluid (HTF) [1, 2]. However, thermal oils maximum operating temperature should be below ~400ºC for assuring no oil degradation, hence limiting the power cycle gross efficiency up to ~38%. For overcoming this limitation Molten...
Ver en: https://oa.upm.es/43999/
Thermodynamic optimisation of supercritical CO2 Brayton power cycles coupled to Direct Steam Generation Line-Focusing solar fields
Repositorio: Archivo Digital UPM
Coco Enriquez, Luis, Muñoz Antón, Javier, Martínez-Val Peñalosa, José María
In this paper a new generation line-focusing solar plants coupled to a s-CO2 Brayton power cycles are studied. These innovative CSP will increase the plant energy efficiency, and subsequently optimizing the SF effective aperture area and SF investment cost for a fixed power output. Two SF configurations were assessed: the Configuration 1 with a condenser between the SF and the Balance Of Plant (BOP), for Turbine Inlet Temperatures (TIT) up to 400oC, and the Configuration 2, for higher TIT up to...
Ver en: https://oa.upm.es/44001/
Fruit maturity and post-harvest environmental conditions influence the pre-penetration stages of Monilinia infections in peaches
Repositorio: Archivo Digital UPM
Garcia Benitez, Carlos, Melgarejo, Paloma, Cal Cotina, Antonieta De
Brown rot caused by the fungi Monilinia laxa (Aderhold and Ruhland) Honey, M. fructicola (Winter) Honey, or M. fructigena (Aderhold and Ruhland) is a serious fungal disease of peaches. The fungal infection process begins when fungal conidia germinate on the fruit surface to produce germtubes and/or appressoria, and the incidence of brown rot increases as fruit approaches maturity. The interaction between the fungal infection process, peach maturity, and the environmental conditions is not well...
Ver en: https://oa.upm.es/44013/
Measurement of the Horizon Elevation for satellite tracking antennas Located in Urban and Metropolitan Areas Combining Geographic and Electromagnetic Sensors
Repositorio: Archivo Digital UPM
Farjas Abadía, Mercedes, Nieves-Chinchilla, Jesús, Martínez, Ramón
In urban and metropolitan areas presence of nearby obstacles and signal interference sources surrounding tracking antenna locations reduces satellite communication times. In low orbit missions these obstructions are even more relevant due to a few minutes per satellite pass. In this scenario a best estimation of the antenna elevation mask in the mission frequency band is proposed to test the antenna design for a given site by applying mission simulation software before the installation stage....
Ver en: https://oa.upm.es/44018/
Effects of the inclusion of sunflower hulls in the diet on growth performance and digestive tract traits of broilers and pullets fed a broiler diet from zero to 21 d of age. A comparative study
Repositorio: Archivo Digital UPM
Kimiaeitalab, Mohammadvahid, Camara Garcia, Lourdes, Mirzaie Goudarzi, Sara, Jiménez Moreno, E., Gonzalez Mateos, Gonzalo
The effects of including 3% sunflower hulls (SFH) in the diet on growth performance, nutrient retention (TTAR), and gastrointestinal tract (GIT) traits were studied in chicks from zero to 21 d of age. Four treatments that resulted from the combination of 2 chicken lines (female broilers vs. brown pullets) and 2 levels of SFH (zero vs. 3%) were used. The control diet contained 2,980 kcal AMEn/kg, 1.25% digestible Lys, and 8.7% neutral detergent fiber. The experimental diet included 3% SFH at the...
Ver en: https://oa.upm.es/44019/
Replacing dietary corn with bakery by-products supplemented with enzyme and evaluating performance of laying hens
Repositorio: Archivo Digital UPM
Torki, Mehran, Kimiaeitalab, Mohammadvahid
The objectives of this experiment were to investigate effects of dietary replacement of maize with bakery by-product (BB) with or without enzyme supplementation on the performance of laying hens and egg quality characteristics. A total number of one hundred and eighty 87-week-old Hy-Line Leghorn hens, with an average laying rate of 56.7±3.8% (late production phase) and 1470±14 g live body weight, were weighed and distributed between 30 cages with almost same egg production (EP) level among the...
Ver en: https://oa.upm.es/44020/
Energy efficiency strategies for ecological greenhouses: experiences from Murcia (Spain)
Repositorio: Archivo Digital UPM
Becerril Hernández, Hilario, Ríos Carmenado, Ignacio de los
There has been a continuous growth in ecological agriculture (EA) in recent years. It is recognized as a production system with rational energy use and low demand for fossil fuels. There are many studies relating to this subject, in contrast to the few studies regarding the use of energy and its impact on the environment in ecological greenhouses. This article analyzes the strategies adopted by a Transformational Agricultural Society (Sociedad Agraria de Transformación) in order to improve...
Ver en: https://oa.upm.es/44024/
Integration between direct steam generation in linear solar collectors and supercritical carbon dioxide Brayton power cycles
Repositorio: Archivo Digital UPM
Coco Enríquez, Luis, Muñoz Antón, Javier, Martínez-Val Peñalosa, José María
Direct Steam Generation in Parabolic Troughs or Linear Fresnel solar collectors is a technology under development since beginning of nineties (1990's) for replacing thermal oils and molten salts as heat transfer fluids in concentrated solar power plants, avoiding environmental impacts. In parallel to the direct steam generation technology development, supercritical Carbon Dioxide Brayton power cycles are maturing as an alternative to traditional Rankine cycles for increasing net plant...
Ver en: https://oa.upm.es/44025/
Emerging dance movements under ecological constraints in Contact Improvisation dancers with different background
Repositorio: Archivo Digital UPM
Torrents, C., Coterón López, Javier, Ric, A., Hristovski, R.
Contact improvisation dance generates different ways of moving and a varied use of motor creativity depending on the constraints acting on the system. The aim of this study was to analyse the softlyassembled dynamics and the emergency of different dance movements of different couples of improvisers with different background dancing under specific task constraints manipulations. One couple of
contemporary dancers and one couple of novices were video-recorded while dancing with different...
Ver en: https://oa.upm.es/44032/
Virtual-work-based optimization design on compliant transmission mechanism for flapping-wing aerial vehicles
Repositorio: Archivo Digital UPM
Zhang, Chao, Rossi, Claudio, He, Wei, Colorado Montaño, Julián
This paper presents a method for analyzing and optimizing the design of a compliant transmission mechanism for a flapping-wing aerial vehicle. Its purpose is of minimizing the peak input torque required from a driving motor. In order to maintain the stability of flight, minimizing the peak input torque is necessary. To this purpose, first, a pseudo-rigid-body model was built and a kinematic analysis of the model was carried out. Next, the aerodynamic torque generated by flapping wings was...
Ver en: https://oa.upm.es/44035/
Shape memory alloy-based high phase order motor
Repositorio: Archivo Digital UPM
Rossi, Claudio, Yuan, Zongjian, Zhang, Chao, Barrientos Cruz, Antonio, Coral Cuellar, William
In this paper, we present our current work in the design and characterisation of a new shape memory alloy (SMA)-based High Phase Order Motor (HPOM). The motor can be used either in stepping mode or in servo mode of operation. Each phase of the motor consists of an SMA wire with a spring. The principle of operation of the HPOM is presented. In its operation the motor resembles a stepper motor though the actuation principles are different and hence has been characterised similar to a stepper...
Ver en: https://oa.upm.es/44036/
Obtaining cloud top height from WRF model vertical profiles: application to the EUSO program
Repositorio: Archivo Digital UPM
Merino, A., Sánchez, J.L., López, L., Gascón, E., García-Ortega, E., Hermida, L., Fernández-González, S., Soriano, J.F, Sáez-Cano, G., del Peral, L., Reyes, M., Joven, E., Martín, Y., Licandro, J., Franchini Longhi, Sebastian Nicolas, Rodríguez Frías, M.D.
The objective of the Extreme Universe Space Observatory (EUSO) program is detection and measurement of high-energy particles that reach earth?s atmosphere from space. Clouds at mid and upper levels of the troposphere can interfere with such detection. Therefore, determining cloud top height with high accuracy is crucial to estimating the effect of clouds on these measurements.With this aim, we developed a method to extract that height using cloud temperature via vertical profiles predicted by...
Ver en: https://oa.upm.es/44037/
On some characteristics of the spatial distribution of turbulence components over the Bolund hill determined in wind tunnel compared to full-scale measurements
Repositorio: Archivo Digital UPM
Cuerva Tejero, Alvaro, Gallego Castillo, Cristóbal José, Lopez Garcia, Oscar, Avila Sanchez, Sergio, Yeow, Tee Seong
A comparison is presented between wind tunnel (WT) and full scale (FS) measurements of spatial distributions of turbulence intensities, IUi = aUiS~1, and their ratios; U4 being the fluctuations of velocity components and S the mean velocity magnitude, over the Bolund hill. The Bolund experiment, conducted by Ris0-DTU during a 3-month period in the winter of 2007-2008, is probably the most relevant test case of flow models oriented to wind energy analysis, in this case, over highly complex...
Ver en: https://oa.upm.es/44038/