Recursos de colección

Archivo Digital UPM (109.492 recursos)

This is an institutional repository providing access to the research output of the institution. Primarily contains thesis.

Materia = Psicología

Mostrando recursos 1 - 20 de 40

  1. Análisis de las metodologías de evaluación de riesgos en obras de edificación. Nueva metodología adaptada a edificación

    Carpio de los Pinos, Antonio José; González García, María de las Nieves
    La evaluación de riesgos examina la prevención analizando probabilidad de que se produzca un daño en base a exposición al peligro. Diversas metodologías analizan trabajo y entorno, dependiendo del tipo de empresa, de trabajo, cantidad de trabajadores, localización, etc., evaluando independientemente riesgos específicos de seguridad, higiene, ergonomía y psicosociología. Se basan en valoraciones subjetivas de causas y consecuencias de accidentes. Como los puestos de trabajo en edificación son muy variables en el tiempo, con interdependencias y desplazamientos por la obra, se ha realizado una investigación teórico-analítica de metodologías de evaluación de riesgos laborales, proponiéndose una nueva adaptada a obras de...

  2. La importancia de usar una muestra de calentamiento para estudiar la respuesta emocional del consumidor.

    Picard, Amandine; Chaya Romero, Carolina
    El objetivo de este trabajo es evaluar la influencia de la utilización de una muestra de calentamiento sobre la respuesta emocional del consumidor. Para el estudio de la respuesta emocional del consumidor se ha traducido al español el léxico propuesto por King y Meiselman (2010) y se ha aplicado el método EsSense Profile propuesto por dichos autores, con un total de 38 términos. La prueba ha sido realizada por 69 consumidores sobre dos marcas de chocolate distintas. El orden de presentación se equilibró de forma que cada producto apareciese el mismo número de veces en la primera posición. Después de probar un producto, los...

  3. Towards architectural foundations for cognitive self-aware systems

    Sanz Bravo, Ricardo
    In this talk we address a proposal concerning a methodology for extracting universal, domain neutral, architectural design patterns from the analysis of biological cognition. This will render a set of design principles and design patterns oriented towards the construction of better machines. Bio- inspiration cannot be a one step process if we we are going to to build robust, dependable autonomous agents; we must build solid theories first, departing from natural systems, and supporting our designs of artificial ones.

  4. Desarollo de un sistema interactivo para estimulación cognitiva en HTML5

    Vergel Martín, Tania
    En España hay más de 115.500 personas que padecen Parkinson. Esto la convierte en la segunda enfermedad neurodegenerativa más común, por detrás del Alzheimer. La mayoría de los enfermos se encuentran en edades comprendidas entre los 50 y los 80 años, lo que unido al incremento de la esperanza de vida hace que se prevea un incremento del número de enfermos de Parkinson en pocos años. El Parkinson es un desorden crónico y degenerativo que afecta a la parte del cerebro encargada del sistema motor, es decir, la encargada de coordinar la actividad, el tono muscular y los movimientos, así como...

  5. Brain structural and functional recovery following initiation of combination antiretroviral therapy

    Becker, James T.; Cuesta, Pablo; Fabrizio, Melissa; Sudre, Gustavo; Vergis, Emanuel N.; Douaihy, Antoine; Bajo Breton, Ricardo; Schubert, Allie; Lopez, Oscar L.; Parkkonen, Lauri; Maestú, Fernando; Bagic, Anto
    NeuroAIDS persists in the era of combination antiretroviral therapies. We describe here the recovery of brain structure and function following 6 months of therapy in a treatment-naive patient presenting with HIV-associated dementia. The patient’s neuropsychological test performance improved and his total brain volume increased by more than 5 %. Neuronal functional connectivity measured by magnetoencephalography changed from a pattern identical to that observed in other HIV-infected individuals to one that was indistinguishable from that of uninfected control subjects. These data suggest that at least some of the effects of HIV on the brain can be fully reversed with treatment.

  6. Changes in resting-state functionally connected parieto-frontal networks after videogame practice

    Martínez, Kenia; Solana Sánchez, Ana Beatriz; Burgaleta, Miguel; Hernández Tamames, J.A.; Alvarez Linera, Juan; Román, Francisco J.; Alfayate, E.; Privado, Jesús; Escorial, Sergio; Quiroga, Mª Ángeles; Karama, Sherif; Bellec, Pierre; Colom, Roberto
    Neuroimaging studies provide evidence for organized intrinsic activity under task-free conditions. This activity serves functionally relevant brain systems supporting cognition. Here, we analyze changes in resting-state functional connectivity after videogame practice applying a test–retest design. Twenty young females were selected from a group of 100 participants tested on four standardized cognitive ability tests. The practice and control groups were carefully matched on their ability scores. The practice group played during two sessions per week across 4 weeks (16 h total) under strict supervision in the laboratory, showing systematic performance improvements in the game. A group independent component analysis (GICA) applying...

  7. Optimizing Functional Network Representation of Multivariate Time Series

    Zanin, Massimiliano; Sousa, Pedro; Papo, David; Bajo Breton, Ricardo; García Prieto, Juan; Pozo, Francisco del; Menasalvas Ruiz, Ernestina; Boccaletti, Stefano
    By combining complex network theory and data mining techniques, we provide objective criteria for optimization of the functional network representation of generic multivariate time series. In particular, we propose a method for the principled selection of the threshold value for functional network reconstruction from raw data, and for proper identification of the network's indicators that unveil the most discriminative information on the system for classification purposes. We illustrate our method by analysing networks of functional brain activity of healthy subjects, and patients suffering from Mild Cognitive Impairment, an intermediate stage between the expected cognitive decline of normal aging and the...

  8. Editorial

    Zanin, Massimiliano; Gutiérrez, R.; Bajo Breton, Ricardo; Martín Buldú, Javier; Papo, David; Boccaletti, Stefano
    In fact, much of the attraction of network theory initially stemmed from the fact that many networks seem to exhibit some sort of universality, as most of them belong to one of three classes: random, scale-free and small-world networks. Structural properties have been shown to translate into different important properties of a given system, including efficiency, speed of information processing, vulnerability to various forms of stress, and robustness. For example, scale-free and random topologies were shown to be...

  9. Analysis of spontaneous MEG activity in mild cognitive impairment and Alzheimer's disease using spectral entropies and statistical complexity measures

    Bruña Fernandez, Ricardo; Poza Crespo, Jesús; Gómez Peña, Carlos; García Gadañón, María; Fernández Lucas, Alberto; Hornero, Roberto
    Alzheimer's disease (AD) is the most common cause of dementia. Over the last few years, a considerable effort has been devoted to exploring new biomarkers. Nevertheless, a better understanding of brain dynamics is still required to optimize therapeutic strategies. In this regard, the characterization of mild cognitive impairment (MCI) is crucial, due to the high conversion rate from MCI to AD. However, only a few studies have focused on the analysis of magnetoencephalographic (MEG) rhythms to characterize AD and MCI. In this study, we assess the ability of several parameters derived from information theory to describe spontaneous MEG activity from...

  10. Colocalization of α-actinin and Synaptopodin in the Pyramidal Cell Axon Initial Segment

    Sánchez-Ponce, Diana; Blázquez-Llorca, Lidia; Felipe Oroquieta, Javier de; Garrido, Juan José; Muñoz Céspedes, Alberto
    The cisternal organelle that resides in the axon initial segment (AIS) of neocortical and hippocampal pyramidal cells is thought to be involved in regulating the Ca(2+) available to maintain AIS scaffolding proteins, thereby preserving normal AIS structure and function. Through immunocytochemistry and correlative light and electron microscopy, we show here that the actin-binding protein ?-actinin is present in the typical cistenal organelle of rodent pyramidal neurons as well as in a large structure in the AIS of a subpopulation of layer V pyramidal cells that we have called the "giant saccular organelle." Indeed, this localization of ?-actinin in the AIS...

  11. Distributed System for Cognitive Stimulation Over Interactive TV.

    GarcÍa Vázquez, Carolina; Moreno Martínez, Esther; Valero Duboy, Miguel Ángel; Gómez Oliva, Ana
    Descripción y evaluación de sistema de estimulación cognitiva a través de la TDT orientada a personas con enfermedad de Parkinson, con supervisión por parte de sus terapeutas de forma remota. Abstract: This paper details the full design, implementation, and validation of an e-health service in order to improve the community health care services for patients with cognitive disorders. Specifically, the new service allows Parkinson’s disease patients benefit from the possibility of doing cognitive stimulation therapy (CST) at home by using a familiar device such as a TV set. Its use instead of a PC could be a major advantage for some patients whose lack...

  12. Dysfunctional and compensatory duality in mild cognitive impairment during a continuous recognition memory task

    Bajo Breton, Ricardo
    One of the current issues of debate in the study of mild cognitive impairment (MCI) is deviations of oscillatory brain responses from normal brain states and its dynamics. This work aims to characterize the differences of power in brain oscillations during the execution of a recognition memory task in MCI subjects in comparison with elderly controls. Magnetoencephalographic (MEG) signals were recorded during a continuous recognition memory task performance. Oscillatory brain activity during the recognition phase of the task was analyzed by wavelet transform in the source space by means of minimum norm algorithm. Both groups obtained a 77% hit ratio....

  13. Assessing user bias in affect detection within context-based spoken dialog systems

    Lebai Lutfi, Syaheerah Binti; Fernández Martínez, Fernando; Casanova García, Andrés; López Lebón, Lorena; Montero Martínez, Juan Manuel
    This paper presents an empirical evidence of user bias within a laboratory-oriented evaluation of a Spoken Dialog System. Specifically, we addressed user bias in their satisfaction judgements. We question the reliability of this data for modeling user emotion, focusing on contentment and frustration in a spoken dialog system. This bias is detected through machine learning experiments that were conducted on two datasets, users and annotators, which were then compared in order to assess the reliability of these datasets. The target used was the satisfaction rating and the predictors were conversational/dialog features. Our results indicated that standard classifiers were significantly more...

  14. Desarrollo de una Interfaz de sustitución sensorial para el estudio de la percepción del flujo vibrotáctil (retina táctil)

    Cancar, Leandro
    En el presente trabajo fin de máster se ha concebido, diseñado e utilizado una interfaz háptica, adecuada para ser utilizada como dispositivo de sustitución sensorial, la cual hemos llamado retina táctil. Por cuanto trata de proporcionar información propia del sentido de la vista a través del sentido del tacto. Durante este trabajo, que fue desarrollado en el grupo de robótica y cibernética CAR UPM-CSIC, se ha trabajado en estrecha colaboración con el departamento de la facultad de psicología de la universidad autónoma de Madrid, los cuales han definido las bases de la información de alto orden, como podrían ser, gradientes...

  15. Topological measure locating the effective crossover between segregation and integration in a modular network

    Ajdari Rad, Ali; Sendiña Nadal, Irene; Papo, David; Zanin, Massimiliano; Buldu, Javier M.; Pozo Guerrero, Francisco del; Boccaletti, Stefano
    We introduce an easily computable topological measure which locates the effective crossover between segregation and integration in a modular network. Segregation corresponds to the degree of network modularity, while integration is expressed in terms of the algebraic connectivity of an associated hypergraph. The rigorous treatment of the simplified case of cliques of equal size that are gradually rewired until they become completely merged, allows us to show that this topological crossover can be made to coincide with a dynamical crossover from cluster to global synchronization of a system of coupled phase oscillators. The dynamical crossover is signaled by a peak...

  16. Lateral orbitofrontal cortex involvement in initial negative aesthetic impression formation

    Munar i Roca, Enric; Nadal Roberts, Marcos; Rosselló Mir, Jaume; Flexas Oliver, Albert; Moratti, Stephan; Maestú, Fernando; Marty Broquet, Gisèle Marie; Cela Conde, Camilo José
    It is well established that aesthetic appreciation is related with activity in several different brain regions. The identification of the neural correlates of beauty or liking ratings has been the focus of most prior studies. Not much attention has been directed towards the fact that humans are surrounded by objects that lead them to experience aesthetic indifference or leave them with a negative aesthetic impression. Here we explore the neural substrate of such experiences. Given the neuroimaging techniques that have been used, little is known about the temporal features of such brain activity. By means of magnetoencephalography we registered the...

  17. Aesthetic appreciation: event-related field and time-frequency analyses

    Munar i Roca, Enric; Nadal Roberts, Marcos; Perales Castellanos, Nazareth; Flexas Oliver, Albert; Maestú, Fernando; Mirasso, Claudio R.; Cela Conde, Camilo José
    Improvements in neuroimaging methods have afforded significant advances in our knowledge of the cognitive and neural foundations of aesthetic appreciation. We used magnetoencephalography (MEG) to register brain activity while participants decided about the beauty of visual stimuli. The data were analyzed with event-related field (ERF) and Time-Frequency (TF) procedures. ERFs revealed no significant differences between brain activity related with stimuli rated as “beautiful” and “not beautiful.” TF analysis showed clear differences between both conditions 400 ms after stimulus onset. Oscillatory power was greater for stimuli rated as “beautiful” than those regarded as “not beautiful” in the four frequency bands (theta,...

  18. Efficiency at Rest: Magnetoencephalographic Resting-State Connectivity and Individual Differences in Verbal Working Memory

    Bajo Breton, Ricardo; Rio, David del; Cuesta, Pablo; García-Pacios, J.; Lopez Higes, Ramon; Pozo, Francisco del; Maestú, Fernando
    Inter-individual differences in cognitive performance are based on an efficient use of task-related brain resources. However, little is known yet on how these differences might be reflected on resting-state brain networks. Here we used Magnetoencephalography resting-state recordings to assess the relationship between a behavioral measurement of verbal working memory and functional connectivity as measured through Mutual Information. We studied theta (4?8 Hz), low alpha (8?10 Hz), high alpha (10?13 Hz), low beta (13?18 Hz) and high beta (18?30 Hz) frequency bands. A higher verbal working memory capacity was associated with a lower mutual information in the low alpha band, prominently...

  19. Functional connectivity measured with magnetoencephalography identifies persons with HIV disease

    Becker, James T.; Bajo Breton, Ricardo; Fabrizio, Melissa; Sudre, Gustavo; Aizenstein, Howard J.; Lopez, Oscar L.; Wolk, David; Parkkonen, Lauri; Maestú, Fernando; Bagic, Anto
    There is need for a valid and reliable biomarker for HIV Associated Neurocognitive Disorder (HAND). The purpose of the present study was to provide preliminary evidence of the potential utility of neuronal functional connectivity measures obtained using magnetoencephalography (MEG) to identify HIV-associated changes in brain function. Resting state, eyes closed, MEG data from 10 HIV-infected individuals and 8 seronegative controls were analyzed using mutual information (MI) between all pairs of MEG sensors to ...

  20. Do the spatial characteristics of myocardial scar tissue determine the risk of ventricular arrhythmias?

    Rubio Guivernau, José Luis; Ledesma Carbayo, María Jesús; Arenal Maíz, Ángel; Hernández, Jesús; Pérez David, Esther; Fernández Avilés, Francisco
    Sudden cardiac death is one of the main causes of mortality in patients with structural heart disease. Although an implantable cardioverter de?brillator signi?cantly reduces the mortality rate, many patients never receive a shock. Identi?cation of high-risk patients would reduce the costs associated with this therapy and prevent the deleterious effect of inappropriate discharges. As scar tissue is the substrate of ventricular arrhythmias in patients with structural heart disease, scar characterization could allow strati?cation of the risk. The objective of this article is to review the role of scar characteristics in the pathogenesis of ventricular arrhythmias in patients with structural heart...

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.