Departament d'Informàtica, Matemàtica Aplicada i Estadísticahttp://hdl.handle.net/10256/15282024-03-28T09:14:33Z2024-03-28T09:14:33ZNon-photorealistic rendering as a feedback strategy in virtual reality for rehabilitationQuintana, DavidRodríguez Benítez, AntonioSbert, MateuSilva Blas, YolandaRufino-Felipe, ErnestoBoada Oliveras, Immaculadahttp://hdl.handle.net/10256/245872024-03-21T12:33:52Z2024-03-04T00:00:00ZNon-photorealistic rendering as a feedback strategy in virtual reality for rehabilitation
Quintana, David; Rodríguez Benítez, Antonio; Sbert, Mateu; Silva Blas, Yolanda; Rufino-Felipe, Ernesto; Boada Oliveras, Immaculada
Virtual reality (VR) rehabilitation has been proven to be a very promising method to increase the focus and attention of patients by immersing them in a virtual world, and through that, improve the effectiveness of the rehabilitation. One of the biggest challenges in designing VR Rehabilitation exercises is in choosing feedback strategies that guide the patient and give the appropriate success/failure indicators, without breaking their sense of immersion. A new strategy for feedback is proposed, using non-photorealistic rendering (NPR) to highlight important parts of the exercise the patient needs to focus on and fade out parts of the scene that are not relevant. This strategy is implemented into an authoring tool that allows rehabilitators specifying feedback strategies while creating exercise profiles. The NPR feedback can be configured in many ways, using different NPR schemes for different layers of the exercise environment such as the background environment, the non-interactive exercise objects, and the interactive exercise objects. The main features of the system including the support for universal render pipeline, camera stacking, and stereoscopic rendering are evaluated in a testing scenario. Performance tests regarding memory usage and supported frames per second are also considered. In addition, a group of rehabilitators evaluated the system usability. The proposed system meets all the requirements to apply NPR effect in VR scenarios and solves all the limitations with regard to technical function and image quality. In addition, the system performance has been shown to meet the targets for low-cost hardware. Regarding authoring tool usability rehabilitators agree that is easy to use and a valuable tool for rehabilitation scenarios. NPR schemes can be integrated into VR rehabilitation scenarios achieving the same image quality as non-VR visualizations with only a small impact on the frame rate. NPR schemes are a good visual feedback alternative
2024-03-04T00:00:00ZThe Aging Imageomics Study: rationale, design and baseline characteristics of the study populationPuig Alcántara, JosepBiarnés, CarlesPedraza, S.Vilanova, Joan CarlesPamplona, ReinaldFernández-Real Lemos, José ManuelBrugada, RamonRamos Blanes, RafelColl de Tuero, GabrielCalvó Perxas, LaiaSerena, JoaquínRamió i Torrentà, LluísGich Fullà, JordiGallart, LluisPortero Otin, ManuelAlberich Bayarri, ÁngelJiménez Pastor, AnaCamacho-Ramos, EduardoMayneris Perxachs, JordiPineda, VictorFont Lladó, RaquelPrats Puig, AnnaGacto Sánchez, MarianoDeco, GustavoEscrichs, AniraClotet, BonaventuraParedes, RogerNegredo, EugeniaTriaire, BrunoRodríguez Barrena, ManuelHeredia Escámez, AlbertoCoronado, RafaelGraaf, Walter dePrevost, ValentinMitulescu, AncaDaunis-i-Estadella, PepusThió i Fernández de Henestrosa, SantiagoMiralles, FelipRibas Ripoll, VicentPuig Domingo, ManelEssig, MarcoFigley, Chase R.Figley, Teresa D.Albensi, BenedictAshraf, AhmedReiber, Johan H.C.Schifitto, GiovanniUddin, Md NasirLeiva Salinas, CarlosWintermark, MaxNael, KambizVilalta Franch, JoanBarretina, JordiGarre Olmo, Josephttp://hdl.handle.net/10256/245682024-03-06T08:08:48Z2020-07-01T00:00:00ZThe Aging Imageomics Study: rationale, design and baseline characteristics of the study population
Puig Alcántara, Josep; Biarnés, Carles; Pedraza, S.; Vilanova, Joan Carles; Pamplona, Reinald; Fernández-Real Lemos, José Manuel; Brugada, Ramon; Ramos Blanes, Rafel; Coll de Tuero, Gabriel; Calvó Perxas, Laia; Serena, Joaquín; Ramió i Torrentà, Lluís; Gich Fullà, Jordi; Gallart, Lluis; Portero Otin, Manuel; Alberich Bayarri, Ángel; Jiménez Pastor, Ana; Camacho-Ramos, Eduardo; Mayneris Perxachs, Jordi; Pineda, Victor; Font Lladó, Raquel; Prats Puig, Anna; Gacto Sánchez, Mariano; Deco, Gustavo; Escrichs, Anira; Clotet, Bonaventura; Paredes, Roger; Negredo, Eugenia; Triaire, Bruno; Rodríguez Barrena, Manuel; Heredia Escámez, Alberto; Coronado, Rafael; Graaf, Walter de; Prevost, Valentin; Mitulescu, Anca; Daunis-i-Estadella, Pepus; Thió i Fernández de Henestrosa, Santiago; Miralles, Felip; Ribas Ripoll, Vicent; Puig Domingo, Manel; Essig, Marco; Figley, Chase R.; Figley, Teresa D.; Albensi, Benedict; Ashraf, Ahmed; Reiber, Johan H.C.; Schifitto, Giovanni; Uddin, Md Nasir; Leiva Salinas, Carlos; Wintermark, Max; Nael, Kambiz; Vilalta Franch, Joan; Barretina, Jordi; Garre Olmo, Josep
Biomarkers of aging are urgently needed to identify individuals at high risk of developing age-associated disease or disability. Growing evidence from population-based studies points to whole-body magnetic resonance imaging's (MRI) enormous potential for quantifying subclinical disease burden and for assessing changes that occur with aging in all organ systems. The Aging Imageomics Study aims to identify biomarkers of human aging by analyzing imaging, biopsychosocial, cardiovascular, metabolomic, lipidomic, and microbiome variables. This study recruited 1030 participants aged ≥50 years (mean 67, range 50-96 years) that underwent structural and functional MRI to evaluate the brain, large blood vessels, heart, abdominal organs, fat, spine, musculoskeletal system and ultrasonography to assess carotid intima-media thickness and plaques. Patients were notified of incidental findings detected by a certified radiologist when necessary. Extensive data were also collected on anthropometrics, demographics, health history, neuropsychology, employment, income, family status, exposure to air pollution and cardiovascular status. In addition, several types of samples were gathered to allow for microbiome, metabolomic and lipidomic profiling. Using big data techniques to analyze all the data points from biological phenotyping together with health records and lifestyle measures, we aim to cultivate a deeper understanding about various biological factors (and combinations thereof) that underlie healthy and unhealthy aging
2020-07-01T00:00:00ZViolinboxplot and enhanced radar plot as components of effective graphical dashboards: An educational example of sports analyticsCasals, MartíDaunis-i-Estadella, Pepushttp://hdl.handle.net/10256/245672024-03-05T14:45:05Z2023-04-01T00:00:00ZViolinboxplot and enhanced radar plot as components of effective graphical dashboards: An educational example of sports analytics
Casals, Martí; Daunis-i-Estadella, Pepus
A statistical graph can offer an alternative compelling approach to statistical thinking that focuses on important concepts rather than procedural formulas. Nowadays, visualizing multidimensional/multivariate data is essential but can also be challenging. In sport analytics, the exploration and descriptive analysis of data using visualization techniques has increased in recent years to, for example, describe possible patterns and uncertainty of player performance. These visualization techniques have been used so far with different purposes by various professionals in the sport industry, such as managers, coaches, scouters, technical staff, journalists, and researchers. The abuse of graphs, such as the radar plot, and their frequent misinterpretation in the world of sports and possible implications for coaching decisions has led us to create more informative and accurate visualizations. Here, we propose new, more educational visualizations we have termed violinboxplots and enhanced radar plot for their use in the sports analytics and other fields. These allow us to visualize, besides distribution and statistical summaries, the extreme data values that can be fundamental in performance studies and allow us to benchmark
2023-04-01T00:00:00ZOn the supervision of peer assessment tasks: an efficient instructor guidance techniqueHernández-González, Jerónimo.Herrara, Pedro Javierhttp://hdl.handle.net/10256/243102024-02-05T11:22:32Z2023-09-27T00:00:00ZOn the supervision of peer assessment tasks: an efficient instructor guidance technique
Hernández-González, Jerónimo.; Herrara, Pedro Javier
In peer assessment, students assess a task done by their peers, provide feedback and usually a grade. The extent to which these peer grades can be used to formally grade the task is unclear, with doubts often arising regarding their validity. The instructor could supervise the peer assessments, but would not then benefit from workload reduction, one of the most appealing features of peer assessment for instructors. Our proposal uses a probabilistic model to estimate a grade for each test, accounting for the degree of precision and bias of grading peers. The grade that the instructor would assign to a test can help enhance the model. Our main hypothesis is that guiding the instructor through supervision of a peer-assessed task by pointing out to them which test to evaluate next can lead to improvement in the validity of the model-estimated grades at an early stage. Moreover, the instructor can decide how many tests to grade based on their own criteria of tolerable uncertainty, as measured by the model. We validate the method using both synthetically generated data and real data collected in an actual class. Models that link the roles of the student as grading peer and as test-taker appear to better exploit available information, although simpler models are more appropriate in specific conditions. The best performing technique for guiding the instructor is that which selects the test with the highest expected entropy reduction. In general, empirical results are in line with the hypothesis of this study
2023-09-27T00:00:00Z