Browsing by Author "Silva, A."
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- Activation timings of the scapular stabilizers in subjects with a stroke affecting the right versus left hemispheresPublication . Ferreira, S.; Silva, Cláudia; Silva, A.; Carvalho, Paulo; Santos, RubimLesions affecting the right hemisphere influence the ability to plan the virtual reaching trajectory and, consequently the postural control. On the other hand, left hemisphere lesions affect the ability to select the adequate motor program to reach the target. This study aimed to explore the existence of differences at the activation timings and sequence of activation of the scapular stabilizers, mainly the serratus anterior, superior, middle and inferior trapezius fibers, in relation to the anterior deltoid, in subjects with a stroke affecting the right versus left hemispheres, during reaching. Besides, it aimed to establish comparisons between both sides of each subject and a group of subjects without of each subject and a group of subjects without pathology.
- An approach to creative classroomsPublication . Peres, Paula; Oliveira, L.; Jesus, Ângelo; Silva, A.This article reflects on 13 years of experience lecturing blended learning higher education courses, in the Polytechnic of Porto. The reflection presented in this paper focus on different learning experiences, special on gamification and how it can make learning and evaluation enjoyable. We implement a new learning environment on higher education. Instead of using the time in-class for lectures we gave online lectures to the students using videos, social network, webinars and interactive e-contents and use the time in-class to promote debates, synchronous communication with students from Portugal and Brazil and other interactive learning activities. In each class we also promote learning activities based on the gamification theory. In this article we present a learning model that we are using in our institution that combines face to face sessions and online sessions in a global higher education environment.
- Application of Infrared Thermal Imaging in a Violinist with Temporomandibular DisorderPublication . Clemente, M.; Coimbra, Daniela; Silva, A.; Gabriel, J.; Branco, C. Aguiar; Pinho, J.C.Temporomandibular disorders (TMD) consist of a group of pathologies that affect the masticatory muscles, temporomandibular joints (TMJ), and/or related structures. String instrumentalists, like many orchestra musicians, can spend hours with head postures that may influence the biomechanical behavior of the TMJ and the muscles of the craniocervicomandibular complex (CCMC). The adoption of abnormal postures acquired during performance by musicians can lead to muscular hyperactivity of the head and cervical muscles, with the possible appearance of TMD. Medical infrared thermography is a non-invasive procedure that can monitor the changes in the superficial tissue related to blood circulation and may serve as a complement to the clinical examination. The objective of this study was to use infrared thermography to evaluate, in one subject, the cutaneous thermal changes adjacent to the CCMC that occur before, during, and after playing a string instrument.
- Can ankle anticipatory postural adjustments associated with gait initiation be modifiede in post stroke subjects submitted to a physiotherapy program?Publication . Pereira, S.; Silva, A.; Silva, C.; Sousa, A.; Gomes, J.; Faria, S.; Santos, RubimPostural control is a complex ability of the central nervous system, fundamental prerequisite in several motor programs, that is often compromised after central nervous system injury, particularly in ischemic events involving the middle cerebral artery. Stroke in this territory frequently compromise cortical output from pre-motor and supplementary motor areas and their connectivity with subcortical structures such as reticular formation.
- Coactivação entre os músculos solear e tibial anterior na marcha de indivíduos pós acidente vascular encefálico crónicoPublication . Tinoco, A. L.; Sousa, A.; Silva, A.; Silva, C.; Santos, R.Estudar a magnitude e duração da coactivação entre o tibial anterior e solear na marcha de indivíduos pós acidente vascular encefálico crónico. Foram analisadas duas amostras - uma com seis indivíduos hemiparéticos e outra com oito sujeitos saudáveis, Foi estudada a sua atividade electromiográfica na fase de apoio, bem como as forças de reacção do solo. Verificou-se uma tendência para durações de coativação superiores nos indivíduos com patologia, bem como um aumento da actividadedo solear na primeira fase do apoio. Encontrram-se diferenças na duração e magnitude da coactivação na marcha dos indivíduos com patologia.
- Cyber-ambient intelligent training of operators in power systems control centresPublication . Faria, Luiz; Silva, A.; Ramos, Carlos; Vale, Zita; Marques, A.Cyber-Physical Systems and Ambient Intelligence are two of the most important and emerging paradigms of our days. The introduction of renewable sources gave origin to a completely different dimension of the distribution generation problem. On the other hand, Electricity Markets introduced a different dimension in the complexity, the economic dimension. Our goal is to study how to proceed with the Intelligent Training of Operators in Power Systems Control Centres, considering the new reality of Renewable Sources, Distributed Generation, and Electricity Markets, under the emerging paradigms of Cyber-Physical Systems and Ambient Intelligence. We propose Intelligent Tutoring Systems as the approach to deal with the intelligent training of operators in these new circumstances.
- A DMS to Support Industrial Process Decision-Making: a contribution under Industry 4.0Publication . Pereira, Maria Teresa; Silva, A.; Ferreira, Luís Pinto; Sá, José Carlos; Silva, F.J.G.This paper presents the development of an Information System (IS) an automotive manufacturing.The system was developed to reduce waste and increase productivity, through better decision-making. The used methodology to implement it was the Business Process Management (BPM). A DMS (Document Management System) for decision making support was built, reducing the action time and providing faster maintenance of all needed data. As a result, the users time decision making and the administrator maintenance was reduced by a total of 26 minutes, corresponding to a 1.61 € reduction per unit built, which means an efficiency of 41%. The present work fits in the company’s strategy for Industry 4.0 and a more sustainable environment, being a positive driver of Industry 4.0 implementation and transformation.
- Ecotoxicological evaluation of chemical indicator substances present as micropollutants in laboratory wastewatersPublication . Silva, A.; Santos, Lúcia H.M.L.M.; Antão, C.; Delerue-Matos, Cristina; Figueiredo, SóniaLaboratories produce a large volume of wastewaters containing different chemical indicators, organic species for which there is no complete knowledge about their effects in the aquatic environment. The aim of this work was to evaluate the ecotoxicity of four chemical indicator substances commonly used in titrations (sodium diphenylamine-4-sulfonate, phenolphthalein, methyl orange, and eriochrome black T) by applying two distinct bioassays that evaluated the growth inhibition of the microalga Chlorella vulgaris and the acute immobilization of the microcrustacean Daphnia magna. All the indicators showed growth inhibition rates in the chronic test performed with the alga C. vulgaris. Only phenolphthalein and eriochrome black-T showed high immobilization rates on the acute test for D. magna. C. vulgaris showed higher sensitivity to the chemical indicators tested than D. magna. Eriochrome black T was the most toxic for both test organisms and, according to the effective concentration that causes inhibition on 50% of C. vulgaris population, it can be considered as “highly toxic to aquatic organisms”. Phenolphthalein and methyl orange may be classified as “toxic to aquatic organisms” and sodium diphenylamine-4-sulfonate is the least toxic, only being considered as “harmful”. This work increases the awareness of the hazardous effects of these chemical indicators and reinforces the need of improved solutions to manage and treat laboratory effluents.
- Evaluation of 18F-FDG PET/CTand low-dose CT performance in diagnosing lymph node metastases among NSCLC patientsPublication . Teodorczyk, J.; Brockhuis, B.; Romanowicz, G.; Cytawa, W.; Wenzel, I.; Kozłowska, J.; Cunha, L.; Silva, A.; Metelo, Luís; Lass, P.The aim of our study is to assess the efficacy of lymph node staging in NSCLC, with particular emphasis on operability, using 18F-FDG-PET-CT and low-dose CT.
- Intelligent behavior in a Cyber-Ambient training system for control center operatorsPublication . Faria, Luiz; Silva, A.; Ramos, Carlos; Gomes, L.; Vale, Zita; Marques, A.This paper deals with the application of an intelligent tutoring approach to delivery training in diagnosis procedures of a Power System. In particular, the mechanisms implemented by the training tool to support the trainees are detailed. This tool is part of an architecture conceived to integrate Power Systems tools in a Power System Control Centre, based on an Ambient Intelligent paradigm. The present work is integrated in the CITOPSY project which main goal is to achieve a better integration between operators and control room applications, considering the needs of people, customizing requirements and forecasting behaviors.