Repositório Colecção:https://hdl.handle.net/1822/646202024-03-29T13:00:20Z2024-03-29T13:00:20ZWearable vibrotactile biofeedback to improve human-exoskeleton compliance during assisted gait trainingPinheiro, Cristiana Filipa SampaioFigueiredo, JoanaSantos, Cristinahttps://hdl.handle.net/1822/896962024-03-21T09:01:54ZTítulo: Wearable vibrotactile biofeedback to improve human-exoskeleton compliance during assisted gait training
Autor: Pinheiro, Cristiana Filipa Sampaio; Figueiredo, Joana; Santos, Cristina
Resumo: Biofeedback may accelerate post-stroke motor recovery during exoskeleton-assisted gait training. A wearable vibrotactile human-robot interaction (HRI)-based biofeedback is proposed to improve human-exoskeleton compliance during gait training assisted by an ankle-foot exoskeleton (AFE). A pre-post study with four healthy subjects was conducted to evaluate biofeedback training’s efficacy. Results show statistically significant improvements (p-value: 4.56e−4–0.03) in HRI torque outcomes and the participants felt motivated about training. Findings suggest that the proposed biofeedback can enhance human-robot compliance.
<b>Tipo</b>: bookPartPhotodynamic therapy review: principles, photosensitizers, applications, and future directionsCorreia, J. H.Rodrigues, José Artur OliveiraPimenta, Sara Filomena RibeiroDong, TaoYang, Zhaochuhttps://hdl.handle.net/1822/895402024-03-14T15:23:34Z2024-03-14T15:23:33ZTítulo: Photodynamic therapy review: principles, photosensitizers, applications, and future directions
Autor: Correia, J. H.; Rodrigues, José Artur Oliveira; Pimenta, Sara Filomena Ribeiro; Dong, Tao; Yang, Zhaochu
Resumo: Photodynamic therapy (PDT) is a minimally invasive therapeutic modality that has gained great attention in the past years as a new therapy for cancer treatment. PDT uses photosensitizers that, after being excited by light at a specific wavelength, react with the molecular oxygen to create reactive oxygen species in the target tissue, resulting in cell death. Compared to conventional therapeutic modalities, PDT presents greater selectivity against tumor cells, due to the use of photosensitizers that are preferably localized in tumor lesions, and the precise light irradiation of these lesions. This paper presents a review of the principles, mechanisms, photosensitizers, and current applications of PDT. Moreover, the future path on the research of new photosensitizers with enhanced tumor selectivity, featuring the improvement of PDT effectiveness, has also been addressed. Finally, new applications of PDT have been covered.
Descrição: "Special issue in Honor of Dr. Michael Weber’s 70th Birthday: photodynamic therapy: rising star in pharmaceutical applications" is a reprint of articles from the Special Issue published online in the open access journal "Pharmaceutics" (ISSN 1999-4923), vol's 13, 14.
<b>Tipo</b>: bookPart2024-03-14T15:23:33ZProjeto integrador em engenharia mecânicaFlores, PauloMarques, FilipeSilva, Mariana Isabel Santos RodriguesNovais, Franciscohttps://hdl.handle.net/1822/880492024-01-11T09:53:19Z2024-01-11T09:53:17ZTítulo: Projeto integrador em engenharia mecânica
Autor: Flores, Paulo; Marques, Filipe; Silva, Mariana Isabel Santos Rodrigues; Novais, Francisco
Resumo: Este livro aborda o ensino de projetos integradores no contexto da formação em Engenharia Mecânica, em que se dá particular destaque ao processo de teardown e ao estudo da dinâmica do carro. Após uma breve abordagem pedagógica aos projetos integradores, são apresentados os conceitos fundamentais relativos à metrologia dimensional e ao processo teardown. Subsequentemente, são detalhados os principais aspetos relacionados com a análise dinâmica de sistemas mecânicos, para depois se focar na dinâmica do carro, tendo em vista o seu desempenho. Este livro é um recurso fundamental de apoio a professores e estudantes, bem como a todos os interessados no ensino por projetos e na dinâmica de sistemas mecânicos.
<b>Tipo</b>: book2024-01-11T09:53:17ZCombination of color-based segmentation, Markov random fields and multilayer perceptronVieira, Pedro MiguelFreitas, Nuno RenatoRolanda, CarlaLima, C. S.https://hdl.handle.net/1822/848902023-06-05T09:38:20Z2023-06-05T09:34:55ZTítulo: Combination of color-based segmentation, Markov random fields and multilayer perceptron
Autor: Vieira, Pedro Miguel; Freitas, Nuno Renato; Rolanda, Carla; Lima, C. S.
Resumo: Angioectasias are lesions characterized by specific features, related to their color and shape. Since the high prevalence of angioectasias in the small bowel, it is of great importance the development of a method to correctly localize these lesions within the intestinal tissue. Since the differences found in the color of the lesions, when compared with other lesions and the normal tissue, it was developed a method based of the probability segmentation of pixels, with a Markov Random Field property to improve the neighborhood of the lesion. This was done with the CIELab color space, since it was found that has high efficiency in differentiating colors in an image.
Descrição: First Online: 10 July 2021
<b>Tipo</b>: bookPart2023-06-05T09:34:55ZCinemática de mecanismosFlores, PauloClaro, José Carlos Pimentahttps://hdl.handle.net/1822/829272023-04-28T08:21:41Z2023-02-27T10:41:18ZTítulo: Cinemática de mecanismos
Autor: Flores, Paulo; Claro, José Carlos Pimenta
Resumo: Neste livro estabelecem-se os fundamentos para o estudo cinemático de mecanismos articulados - como forma de sistematização operativa, compreensão do funcionamento e explicitação de condições de desempenho - bases em que assentam a análise, concepção, projecto, manutenção e re-engenharia de componentes, sistemas e equipamentos mecânicos. Estruturado de forma a introduzir progressivamente as diferentes matérias e as imprescindíveis ferramentas analíticas, aborda um amplo leque de aplicações, acompanhadas de exemplos de resolução alternativos, abrangendo matérias directamente relacionáveis com as áreas tradicionais da mecânica - geral, automóvel, aeronáutica, automação, robótica, etc. -mas também da biomecânica e biomédica, de que a protética, a reabilitação ou a reconstituição são exemplos.
<b>Tipo</b>: book2023-02-27T10:41:18Z