27851 research outputs found
Sort by
Caracterización de interacciones humano-objeto mediante video vigilancia en el contexto del proyecto EYEFUL con Filtros de Kalman y algoritmos de fusión multisensorial
Full text linkEn este Trabajo Fin de Grado se diseña, implementa y valida una cadena de procesamiento para
transformar detecciones 2D procedentes de múltiples cámaras en trayectorias 3D coherentes en un sistema
de coordenadas del mundo (WCS), orientadas a la caracterización de interacciones humano–objeto (HOI)
en actividades de la vida diaria. El problema se aborda en un escenario doméstico real, donde las
oclusiones, pérdidas temporales de detección y ambigüedades de clase degradan la consistencia temporal
y espacial si se trabaja con una sola vista.
La solución se estructura como un pipeline reproducible: (i) ingesta y prefiltrado espacial de
detecciones, (ii) seguimiento monocámara mediante un esquema tracking-by-detection con Filtro de
Kalman, asociación global por fotograma mediante algoritmo Húngaro y validación estadística por gating
(distancia de Mahalanobis), (iii) proyección a 3D en coordenadas del mundo (WCS) usando parámetros
intrínsecos/extrínsecos y mapas de profundidad, y (iv) fusión multisensorial final mediante un “filtro
maestro” que alinea cámaras usando la mesa como ancla geométrica y consolida trayectorias redundantes
con un modelo 6D y criterios de exportación.
La evaluación se realiza de forma cualitativa por clases, revisando la cadena completa
detecciones→2D→3D→comparativa multivista→fusión. Los resultados muestran trayectorias finales
consistentes cuando la entrada es estable (p. ej., persona o mantel), mientras que en clases intrínsecamente
ambiguas (vasos y platos en mesa) las mejoras reducen duplicados y deriva, aunque persisten limitaciones
impuestas por el dato de entrada y la calidad de la observación en mesa.This Bachelor’s Thesis designs, implements, and validates a processing pipeline that converts
multi-camera 2D detections into coherent 3D trajectories in a World Coordinate System (WCS), with
the goal of supporting Human–Object Interaction (HOI) analysis in Activities of Daily Living (ADLs).
The work targets a realistic domestic scenario where occlusions, missed detections, and class ambiguity
make single-view perception brittle and often break temporal identity consistency.
The proposed solution is a reproducible pipeline composed of: (i) detection ingestion and spatial
pre-filtering, (ii) per-camera tracking-by-detection using a Kalman Filter, global frame-wise assignment
via the Hungarian algorithm, and statistical gating based on the Mahalanobis distance, (iii) 3D
back-projection to WCS using camera calibration and depth maps, and (iv) a final multi-sensor fusion
stage (“master filter”) that aligns both cameras using the table as a stable geometric anchor and
consolidates redundant trajectories through a 6D state model and export criteria.
Results are presented qualitatively per object class, following the full chain detections→2D tracks→3D
WCS tracks→multi-view comparison→final fusion. The system produces consistent and interpretable
fused trajectories when the input is stable (e. g., person, tablecloth). For intrinsically ambiguous classes
on the table (e. g., glasses and plates), the introduced mechanisms reduce duplicates and drift, yet the
final output remains constrained by detection quality, depth stability, and viewpoint limitations.Grado en Ingeniería en Electrónica y Automática Industria
Trabajo digno, acoso y violencia en el trabajo desde la perspectiva de los derechos fundamentales. Un análisis comparado Chile-España
Full text link80 p.El Instituto Universitario de Investigación en Estudios Latinoamericanos (IELAT) de la Universidad de Alcalá tiene el honor de presentar este nuevo número de Papeles de Discusión, concebido como una publicación especial en conmemoración del Curso de Altos Estudios en Derecho del Trabajo y de la Seguridad Social de 2025 (1ª edición), celebrado en la Universidad de Alcalá entre el 27 y el 31 de enero de 2025. Este encuentro académico, desarrollado en colaboración con la Universidad de Chile, ha permitido estrechar lazos, compartir planteamientos y consolidar un espacio de formación avanzado
para estudiantes chilenos de posgrado, centrado en el análisis del trabajo digno, el acoso laboral y la protección social desde la perspectiva de los derechos fundamentales.
La celebración de este curso ha puesto de manifiesto la importancia de construir puentes académicos entre España y Chile, y de potenciar la cooperación internacional en un campo tan dinámico y sensible como el Derecho del Trabajo y de la Seguridad Social. La presencia de profesorado de ambas universidades, unido al carácter interdisciplinar de las sesiones, ha permitido abordar los desafíos laborales actuales desde múltiples enfoques teóricos y prácticos. Este número conmemorativo recoge el espíritu de ese intercambio, reuniendo reflexiones que nacen del diálogo académico y de la experiencia compartida durante una intensa semana de trabajo intelectual
Rare earth elements and technology-related trace metals in paediatric scalp hair: a 2001 urban baseline from Spain
Full text linkRare earth elements (REEs) and technology-related trace elements are increasingly used in
modern products and processes, but biomonitoring data in healthy children and adolescents
remain scarce; scalp hair provides a practical, integrative matrix for assessing multi-element
patterns over time. Scalp hair collected in April–May 2001 from children (6–9 years;
n = 120) and adolescents (13–16 years; n = 97) living in Alcalá de Henares (Spain) was
retrieved from archival storage and analysed in 2025 using a single QA/QC-controlled
ICP–MS workflow. Seven REEs (Ce, La, Pr, Nd, Gd, Er, and Y) and nine technologyrelated trace elements (Bi, Sb, Th, U, Pd, Pt, Rh, Ir, and Rb) were quantified after rigorous
decontamination; left-censored data were treated using Kaplan–Meier, regression on order
statistics, and maximum-likelihood approaches, and population reference values were
derived as percentile-based upper limits (P95, 95% CI). In children, REEs were frequently
detected and showed strong within-suite covariation, with medians in the low ng g−1
range (e.g., Ce ≈ 0.011 µg g−1
; La ≈ 0.007 µg g−1
), whereas in adolescents, most REEs were
near reporting limits. Sb and U were ubiquitous in both age groups, while platinum-group
elements were largely undetected. Shale-normalised REE patterns were subparallel across
normalisers, La/Ce anomalies were centred below unity, and weak soil–hair correlations
suggested multiple microenvironmental exposure pathways. These data provide a robust
pre-diffusion baseline for REE metals in European youth, offering a benchmark for future
urban exposome assessments.Agencia Estatal de Investigació
Predicción de la demanda eléctrica de una instalación usando redes neuronales profundas
No full textGrado en Ingeniería en Tecnologías Industriale
Accessible pedagogical proposal for teaching mandarin Chinese to visually impaired people
No full textPara ofrecer a las personas con discapacidad visual un mayor grado de inclusión en la sociedad, se debe considerar
además de aspectos relativos a la independencia en su movilidad física, también en su movilidad intelectual y
laboral. Desde un abordaje teórico donde se profundizan los marcos relacionados con los desafíos y ventajas de
la enseñanza de un idioma extranjero, como objeto de estudio, desarrollamos un libro de cinco capítulos (cuatro
tomos) en braille, diseñado para aprender chino mandarín. Desde un enfoque multimodal, esta investigación hace
una novedosa propuesta de innovación pedagógica dirigida a usuarios con discapacidad visual a través de la
combinación de tres elementos clave, el sistema braille, un audiolibro detallado sobre pronunciación, gramática y
vocabulario, y un innovador dispositivo en 3D que permite a los invidentes tocar los caracteres en relieve,
integrando información de las modalidades sensoriales, auditiva y táctil. Se muestra evidente la necesidad de
utilizar recursos mnemotécnicos como herramienta educativa y la necesidad de su utilización en diferentes etapas
con el propósito de facilitar el aprendizaje de nuevos idiomas. Nuestro propósito principal está orientado a
consolidar la lectura como un elemento de disfrute personal, potenciando la comprensión lectora y, a su vez,
mejorar el nivel de vocabulario en el colectivo de personas con discapacidad visual que quieren aprender un
idioma. La inclusión de códigos alfanuméricos en los libros, que guían al estudiante hacia la ficha correspondiente
en el dispositivo táctil, facilita la navegación y el aprendizaje autónomo del vocabulario y la gramática,
constituyendo una ventaja significativa.To promote greater social inclusion for individuals with visual impairments, it is essential to address not only
physical mobility but also intellectual and professional autonomy. From a theoretical perspective that explores the
challenges and benefits of foreign language acquisition, we have developed a five-chapter (four-volume) braille
textbook designed to teach Mandarin Chinese. This study proposes an innovative pedagogical approach based on
multimodality, aimed at visually impaired learners through the integration of three key elements: the braille
system, a comprehensive audiobook covering pronunciation, grammar, and vocabulary, and an original 3D tactile
device that allows users to feel characters in relief—thus engaging both auditory and tactile sensory modalities.
The use of mnemonic resources is shown to be essential throughout various learning stages, facilitating the
acquisition of new languages. Our primary goal is to strengthen reading as a source of personal enjoyment, enhance reading comprehension, and expand the vocabulary of visually impaired individuals learning a foreign
language. The inclusion of alphanumeric codes in the books, which guide the learner to the corresponding tactile
sheet, significantly improves navigation and supports autonomous learning of grammar and vocabulary
Impact of planted forests on climate change mitigation
Full text link30 p.Forest ecosystems play a key role in the carbon cycle, acting as persistent carbon sinks and reservoirs. Planted forests are subject to particular conditions that modulate CO2 sequestration and carbon storage. Here, we discuss the main environmental conditions and their recent changes, and management actions that affect CO2 sequestration and storage in planted stands. In addition, the involvement of wood products in the carbon cycle is briefly described in comparison with the contrasting and commonly dominating systems based on fossil fuels. Further, we describe information available for monitoring aboveground CO2 sequestration and storage in planted forests in Europe, paying special attention to the potentialities of remote sensing techniques. Finally, we outline some guidelines for both silviculture and new technologies to strengthen climate change mitigation, besides CO2 sequestration and storage in the forest ecosystem
Ageing population and balance under stressful conditions-a cross-sectional observational study
Full text link11 p.Background/Objectives: Falls are a major global issue for older adults, and emotional stress may increase the risk due to its effects on postural control and balance. However, the immediate effects of a stressful stimulus on objective measures of balance and fall risk are unknown. The study aims to explore differences in older adults' performance on the Timed Up and Go (TUG) test before and after such exposure. Methods: In this cross-sectional study, 31 older adults (71.6 ± 4.98 years) were exposed to an emotionally stressful stimulus using high-arousal images from the International Affective Picture System. Participants performed the TUG before (t1) and after (t2) exposure as the primary outcome measure. To assess the physiological and psychological impact of the stressful stimulus, heart rate variability (HRV) was recorded before and during image viewing. A visual analogue scale (VAS) of unease was completed both before and after the stimulus. Results: During the stressful stimulus, the HRV high-frequency (HF) band decreased significantly (p = 0.001), while the low-frequency (LF) band (p = 0.002) and the LF/HF ratio (p = 0.004) showed a significant increase. Similarly, after stressful stimulus, VAS scores demonstrated a statistically significant increase (p < 0.001). The time to complete the TUG showed a statistically significant increase at t2 (p < 0.001). Conclusions: The stressful stimulus triggered both physiological and subjective stress responses. Subsequently, TUG test performance declined (increased duration), suggesting that emotionally stressful stimuli could deteriorate functional balance performance in older adults, potentially increasing fall risk.Junta de Comunidades de Castilla-La ManchaFondo Europeo de Desarrollo Regional (FEDER
The carbon footprint of Spanish tourists : determinants and consumption patterns
Full text linkThis study examines the carbon footprint of tourists using a bottom-up approach that enables detailed and personalised measurement. Based on a survey of a representative sample of 980 Spanish tourists, greenhouse gas (GHG) emissions were assessed across different categories of consumption and transport. The results indicate that transport accounts for the largest proportion of CO? emissions (almost half of the total), followed by food expenditure, tourism activities and accommodation. The analysis also reveals differences in carbon footprint according to sociodemographic factors such as age, income and education level, emphasising that transport, especially in international destinations, is a major source of emissions. This study helps to identify consumption patterns that can inform the design of policies aimed at reducing the carbon footprint of Spanish tourists. // Este estudio examina la huella de carbono de los turistas utilizando un enfoque ascendente que permite una medición detallada y personalizada. A partir de una encuesta realizada a una muestra representativa de 980 turistas españoles, se evaluaron las emisiones de gases de efecto invernadero (GEI) en diferentes categorías de consumo y transporte. Los resultados indican que el transporte representa la mayor proporción de emisiones de CO? (casi la mitad del total), seguido del gasto en alimentación, las actividades turísticas y el alojamiento. El análisis también revela diferencias en la huella de carbono según factores sociodemográficos como la edad, los ingresos y el nivel de educación, y destaca que el transporte, especialmente en destinos internacionales, es una fuente importante de emisiones. Este estudio ayuda a identificar patrones de consumo que pueden servir de base para el diseño de políticas destinadas a reducir la huella de carbono de los turistas españoles.Universidad de Alcal
Unveiling how financial markets could intensify climate change risks
Full text linkThis paper proposes a sustainable finance-based methodology to assess climate change vulnerability in Spain's key economic sectors. It pioneers a panel database merging biophysical, economic, and financial data, analysing private sales responses to climate change. Employing the RCP4.5 scenario, aligned with the EU's 2030 climate policy, it forecasts 10-year financial and economic variables via autoregressive neural networks, emphasizing confidence intervals across scenarios. The obtained results highlight the complexity of climate impacts on business revenues, the importance of considering both climate and financial variables, and the need for business adaptation and resilience in the face of climate change
Comparing the respiratory tract microbiota in captive elephants and humans in Chitwan National Park: implications for conservation medicine
Full text linkThe study of gut microbiome in both animals and humans living in proximity has proven crucial in understanding
their coevolution, the potential for microbial transfer and the dynamics behind various diseases. Similarly, the
investigation of respiratory microbiomes has been gaining popularity due to its significance and impact on
respiratory health. Here, we use 16S rRNA metabarcoding to explore the respiratory microbiome of captive Asian
elephants (Elephas maximus) and their mahouts (i.e., trainers and handlers) in Chitwan National Park (Nepal),
with local villagers residing out of the protected area acting as control. Sputum samples were collected to
characterize their bacterial composition, while its functional profile was inferred with PICRUSt2. Additionally,
the occurrence of genera hosting potentially pathogenic ESKAPE-E species was evaluated. Our findings revealed
high similarity in the bacterial and functional composition of the respiratory microbiome of elephants and
mahouts, with Bacillota and Pseudomonadota emerging as the most abundant phyla across all host categories and
the controls displaying the highest diversity. A striking difference was observed in relation to the family Bacillaceae that dominated the microbial composition of both mahouts and elephants but not controls. Genera hosting
potentially pathogenic ESKAPE-E bacteria were found in all host categories, which underscores the need for indepth analyses to identify the species involved. Our study delivers valuable insights in the respiratory microbial
community of both Asian elephants and humans, thus laying the basis for further investigations on their diversity
and function, unveiling their role in respiratory health of both host species