Browsing Departament de Tecnologia by Title

Now showing items 1-19 of 19

    • A comparative study of in-air trajectories at short and long distances in online handwriting 

      Alonso-Martinez, Carlos; Faundez-Zanuy, Marcos; Mekyska, Jiri (Cognitive Computation. 2017;9:712–720, 2017)
      Existing literature about online handwriting analysis to support pathology diagnosis has taken advantage of in-air trajectories. A similar situation occurred in biometric security applications where the ...

    • Active thermal control in neutral-point-clamped multilevel converters based on switching-cell arrays 

      Alepuz, Salvador; Nicolas-Apruzzese, Joan; Rafiezadeh, Roya; Busquets-Monge, Sergio; Raya Di Francisco, Mariana Candela; Filba-Martinez, Alber (Electronics. 2023;12(19):4055, 2023)
      Neutral-point-clamped multilevel converters are a suitable solution to the implementation of low–medium voltage and power applications at present, thanks to their intrinsic superior voltage and current ...

    • Analysis of fine motor skills in essential tremor: combining neuroimaging and handwriting biomarkers for early management 

      López-de-Ipiña, Karmele; Solé-Casals, Jordi; Sánchez-Méndez, José Ignacio; Romero-Garcia, Rafael; Fernandez, Elsa; Requejo, C.; Poologaindran, Anujan; Faundez-Zanuy, Marcos; Marti Masso, Jose Felix; Bergareche, Alberto; Suckling, John (Frontiers in Human Neuroscience. 2021 Jun 8;15:648573, 2021-06-08)
      Essential tremor (ET) is a highly prevalent neurological disorder characterized by actioninduced tremors involving the hand, voice, head, and/or face. Importantly, hand tremor is present in nearly all ...

    • Analysis of various fractional order derivatives approaches in assessment of graphomotor difficulties 

      Mucha, Ján; Mekyska, Jiri; Galaz, Zoltan; Faundez-Zanuy, Marcos; Zvončák, Vojtěch; Zvončáková, Katarína; Urbanek, Tomas; Havigerova, Jana Marie; Bednarova, Jirina; Smekal, Zdenek (IEEE Access. 2020 Dec 4; 8:218234-218244, 2020-12-04)
      Graphomotor disabilities (GD) are present in up to 30% of school-aged children and are associated with several symptoms in the field of kinematics. Although the basic kinematic features such as velocity, ...

    • Automatic analysis of Archimedes’ spiral for characterization of genetic essential tremor based on Shannon’s entropy and fractal dimension 

      López-de-Ipiña, Karmele; Solé-Casals, Jordi; Faundez-Zanuy, Marcos; Calvo, Pilar M.; Sesa-Nogueras, Enric; Roure Alcobé, Josep; Martinez de lizarduy, Unai; Beitia, Blanca; Fernandez, Elsa; Iradi, Jon; Garcia-Melero, Joseba; Bergareche, Alberto (Entropy. 2018;20(7):531, 2018-07-16)
      Among neural disorders related to movement, essential tremor has the highest prevalence; in fact, it is twenty times more common than Parkinson’s disease. The drawing of the Archimedes’ spiral is the ...

    • Changes in phonation and their relations with progress of Parkinson’s disease 

      Galaz, Zoltan; Mekyska, Jiri; Zvoncak, Vojtech; Mucha, Jan; Kiska, Tomáš; Smekal, Zdenek; Eliasova, Ilona; Mrackova, Martina; Kostalova, Milena; Rektorova, Irena; Faundez-Zanuy, Marcos; Alonso-Hernández, Jesús B.; Gomez-Vilda, Pedro (Applied Sciences. 2018;8(12):2339, 2018-11-22)
      Hypokinetic dysarthria, which is associated with Parkinson’s disease (PD), affects several speech dimensions, including phonation. Although the scientific community has dealt with a quantitative analysis ...

    • Comparison of CNN-learned vs. handcrafted features for detection of Parkinson's disease dysgraphia in a multilingual dataset 

      Galaz, Zoltan; Drotar, Peter; Mekyska, Jiri; Gazda, Matej; Mucha, Jan; Zvoncak, Vojtech; Smekal, Zdenek; Faundez-Zanuy, Marcos; Castrillon, Reinel; Orozco-Arroyave, Juan Rafael; Rapcsak, Steven; Kincses, Tamas; Brabenec, Lubos; Rektorova, Irena (Frontiers in Neuroinformatics. 2022;(16):877139, 2022)
      Parkinson’s disease dysgraphia (PDYS), one of the earliest signs of Parkinson’s disease (PD), has been researched as a promising biomarker of PD and as the target of a noninvasive and inexpensive ...

    • Electric vehicle powertrains with modular battery banks tied to multilevel NPC inverters 

      Busquets-Monge, Sergio; Alepuz, Salvador; Garcia-Rojas, Gabriel; Bordonau, Josep (Electronics. 2023;12(2):266, 2023)
      Nowadays, the internal combustion engine in vehicles is being replaced by electric motors, giving way to the electric vehicle, which results in reduced environmental impact, higher efficiency and lower ...

    • Emotional state recognition performance improvement on a handwriting and drawing task 

      Nolazco Flores, Juan Arturo; Faundez-Zanuy, Marcos; Velázquez-Flores, O. A.; Cordasco, Gennaro; Esposito, Anna (IEEE Access. 2021 Feb 23;(9):28496-28504, 2021-02-21)
      In this work we combine time, spectral and cepstral features of the signal captured in a tablet to characterize depression, anxiety, and stress emotional state recognition on the EMOTHAW database. EMOTHAW ...

    • Exploración de patrones de interacción para su uso en la web semántica 

      Palacios, Alfons; García, Roberto; Oliva, Marta; Granollers, Antoni (Profesional de la Información. 2015 Dic 1;24(6):749-758, 2015-12-01)
      En los últimos años se han publicado múltiples propuestas de conjuntos de patrones de interacción aplicables al diseño y al desarrollo de interfaces web. Paralelamente, la web semántica (WS) mejora los ...

    • Fast reliability assessment of neutral-point-clamped topologies through Markov models 

      Busquets-Monge, Sergio; Rafiezadeh, Roya; Alepuz, Salvador; Filba-Martinez, Alber; Nicolas-Apruzzese, Joan (IEEE Transactions on Power Electronics. 2021;36(12), 2021-06-08)
      This article presents detailed Markov models for the reliability assessment of multilevel neutral-point-clamped (NPC) converter leg topologies, incorporating their inherent fault-tolerance under ...

    • Handwriting biometrics: applications and future trends in e-security and e-health 

      Faundez-Zanuy, Marcos; Fierrez, Julian; Ferrer, Miguel A; Diaz, Moises; Tolosana, Ruben; Plamondon, Réjean (Cognitive Computation. 2020;12;940–953, 2020)
      Online handwritten analysis presents many applications in e-security, signature biometrics being the most popular but not the only one. Handwriting analysis also has an important set of applications in ...

    • Identification and monitoring of Parkinson’s disease dysgraphia based on fractional-order derivatives of online handwriting 

      Mucha, Ján; Mekyska, Jiri; Galaz, Zoltan; Faundez-Zanuy, Marcos; López-de-Ipiña, Karmele; Zvoncak, Vojtech; Kiska, Tomáš; Smekal, Zdenek; Brabenec, Lubos; Rektorova, Irena (Applied Sciences. 2018;8(12):2566, 2018-12-11)
      Parkinson’s disease dysgraphia affects the majority of Parkinson’s disease (PD) patients and is the result of handwriting abnormalities mainly caused by motor dysfunctions. Several effective approaches ...

    • On handwriting pressure normalization for interoperability of different acquisition stylus 

      Faundez-Zanuy, Marcos; Brotons-Rufes, Olga; Paul Recarens, Carles; Plamondon, Réjean (IEEE Access. 2021 Jan 21;9:18443-18453, 2021-01-21)
      In this paper, we present a pressure characterization and normalization procedure for online handwritten acquisition. Normalization process has been tested in biometric recognition experiments (identification ...

    • On the analysis of speech and disfluencies for automatic detection of Mild Cognitive Impairment 

      López-de-Ipiña, Karmele; Martinez de lizarduy, Unai; Calvo, Paula M.; Beitia, Blanca; García Melero, J.; Fernández, E.; Ecay-Torres, Mirian; Faundez-Zanuy, Marcos; Sanz, P. (Neural Computing and Applications. 2020;32:15761–15769, 2018-05-08)
      Alzheimer’s disease is characterized by a progressive and irreversible cognitive deterioration. In a previous stage, the so-called Mild Cognitive Impairment or cognitive loss appears. Nevertheless, this ...

    • Quantitative analysis of relationship between hypokinetic dysarthria and the freezing of gait in Parkinson’s disease 

      Mekyska, Jiri; Galaz, Zoltan; Kiska, Tomas; Zvoncak, Vojtech; Mucha, Jan; Smekal, Zdenek; Eliasova, Ilona; Kostalova, Milena; Mrackova, Martina; Fiedorova, Dagmar; Faundez-Zanuy, Marcos; Solé-Casals, Jordi; Gómez Vilda, Pedro; Rektorova, Irena (Cognitive Computation. 2018;10(6):1006-1018, 2018)
      Hypokinetic dysarthria (HD) and freezing of gait (FOG) are both axial symptoms that occur in patients with Parkinson’s disease (PD). It is assumed they have some common pathophysiological mechanisms and ...

    • Reliability and validity of the Polar V800 sports watch for estimating vertical jump height 

      Garnacho-Castaño, Manu; Faundez-Zanuy, Marcos; Serra Paya, Noemi; Maté-Muñoz, José Luis; López Xarbau, Josep; VILA BLANCH, MOISÈS (Journal of Sports Science and Medicine. 2021;(20):149-157, 2021)
      This study aimed to assess the reliability and validity of the Polar V800 to measure vertical jump height. Twenty-two physically active healthy men (age: 22.89 ± 4.23 years; body mass: 70.74 ± 8.04 kg; ...

    • Selection of entropy based features for automatic analysis of essential tremor 

      López-de-Ipiña, Karmele; Solé-Casals, Jordi; Faundez-Zanuy, Marcos; Calvo, Pilar Maria; Sesa-Nogueras, Enric; Martinez de lizarduy, Unai; Riva de la, Patricia; Marti Masso, Jose Felix; Beitia, Blanca; Bergareche, Alberto (Entropy. 2016;18(5):184, 2016)
      Biomedical systems produce biosignals that arise from interaction mechanisms. In a general form, those mechanisms occur across multiple scales, both spatial and temporal, and contain linear and non-linear ...

    • Supervised physical activity in patients with symptomatic peripheral arterial disease: protocol for a randomized clinical trial (ARTPERfit Study) 

      Alzamora, M Teresa; Forés Raurell, Rosa; Serra Paya, Noemi; Martinez, Esau; Pera, Guillem; Seda, Gemma; Lopez Palencia, Joan; Gomis, Manuel; Heras, Antonio; Valverde, Marta; Garnacho-Castaño, Manu; Torán-Monserrat, Pere (BMJ Open. 2022 Apr 27;12(4):e054352, 2022-04-27)
      Introduction: Peripheral arterial disease (PAD) is a marker of cardiovascular morbidity, causing disability, loss of mobility and poor quality of life, manifesting clinically in the form of intermittent ...