12 documents found, page 1 of 2
Macroinvertebrates associated with macroalgae within integrated multi-trophic a...
Vieira, Rafael; Mateus, Miguel; Afonso, Carlos; Soares, Florbela; Pousão-Ferreira, Pedro; Gamito, SofiaThe present work aims to evaluate the macroinvertebrate community associated with macroalgae in earthen pond systems to better understand their potential in detritus recycling and as an accessory production. Sampling took place on the settling pond of an aquaculture research station, where macroalgae permanently occurred at high densities. The results suggest differentiation between seasons but not between site...
A Tunable Gain and Bandwidth Low-Noise Amplifier with 1.44 NEF for EMG and EOG ...
Vieira, Rafael; Näf, Fabian; Martins, Ricardo; Horta, Nuno; Lourenço, N.; Póvoa, RicardoThis paper presents a low-noise inverter-based current-mode instrumentation amplifier with tunable gain and bandwidth for electromyogram (EMG) and electrooculogram (EOG) biopotential signals, targeting low input noise while maintaining low power consumption. The gain tuning method is based on pseudo-resistors, whereas the bandwidth is tunable due to a varactor system that is controlled by the same control volta...
Burden of disease attributable to risk factors in European countries: a scoping...
Gorasso, Vanessa; Morgado, Joana Nazaré; Charalampous, Periklis; Pires, Sara M.; Haagsma, Juanita A.; Santos, João Vasco; Idavain, Jane; Ngwa, Che HenryObjectives: Within the framework of the burden of disease (BoD) approach, disease, and injury burden estimates attributable to risk factors are a useful guide for policy formulation and priority setting in disease prevention. Considering the important differences in methods, and their impact on burden estimates, we conducted a scoping literature review to: (1) map the BoD assessments including risk factors perf...
Tunable Low-Power Low-Noise Amplifier for Healthcare Applications
Vieira, Rafael; Horta, Nuno; Póvoa, Ricardo; Lourenço, NunoThis book consists of the research, design and implementation, from sizing to layout with parasitic extraction and yield estimation, of a low-power, low-noise amplifier for biomedical and healthcare applications of bio-potential signals, particularly focusing on the electromyography and electrooculography.
A Sub-1 µA Low-Power, LowNoise Amplifier with Tunable Gain and Bandwidth for EM...
Vieira, Rafael; Martins, Ricardo; Horta, Nuno; Lourenço, Nuno; Póvoa, RicardoThis paper presents the design of a low-power low-noise amplifier for biomedical and healthcare applications, focusing on lectromyography and electrooculography. The signals operate in different broad bands, yet follow an impulse-shape transmission, being suitable to be applied and detected by the same receiver. The biopotential sensing amplifiers usually have a major impact in power and noise performance of an...
Induction of metabolic variability of the endophytic fungus Xylaria sp. by OSMA...
Vieira, Rafael; de Sousa, Kally Alves; Monteiro, Afif Felix; Pinto, Luciano Silva; Castro-Gamboa, Ian [UNESP]Made available in DSpace on 2021-06-25T10:26:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01; This work has as the main focus, to analyze the behavior of physic-chemical variations from the fungus Xylaria sp., through the OSMAC (One Strain, Many Compounds) approach as an efficient way of obtaining new compounds. To perform such inductions and to explore the variability of the metabolic network o...
PROPRIEDADES FÍSICO-QUÍMICAS DO AMIDO DO CARÁ (Dioscorea cayennensis) NATIVO E ...
Honorato de Jesus, Jociel; do Carmo Silva de Oliveira, Maria; Maria Minetto Brondani, Filomena; Rossi Oliveira Lima, Regiane; Vieira, RafaelO Cará é uma planta de raiz tuberosa, longas e achatadas com formato de uma moela, os bulbos aéreos. Pertence à família Dioscoriaceae Dicotyledonea e ao gênero Dioscorea com variedades de espécies e alguns são utilizados como alimentos. Sendo uma fonte de amido. Esta pesquisa foi desenvolvida com o objetivo de estudar as propriedades funcionais do amido nativo e modificado através da acetilação. De 3,750 Kg do ...
Transmissão de emaranhamento através de cadeias de spins
Vieira, RafaelConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); In this thesis we studied the transmission of entangled states in unmodulated spin chains using a slight modification in the XY isotropic model (XX model) that describes a one-dimensional spin-1/2 chain. We have shown that it is possible to transmit bipartite entangled states from a sender to a receiver with high fidelity from one end of the ...
Information System for Automation of Counterfeited Documents Images Correlation
Vieira, Rafael; Silva, Catarina; Antunes, Mário; Assis, AnaForgery detection of official documents is a continuous challenge encountered by documents’ forensic experts. Among the most common counterfeited documents we may find citizen cards, passports and driving licenses. Forgers are increasingly resorting to more sophisticated techniques to produce fake documents, trying to deceive criminal polices and hamper their work. Having an updated past counterfeited documents...
Information System for Automation of Counterfeited Documents Images Correlation
Vieira, Rafael; Silva, Catarina; Antunes, Mário; Assis, AnaForgery detection of official documents is a continuous challenge encountered by documents’ forensic experts. Among the most common counterfeited documents we may find citizen cards, passports and driving licenses. Forgers are increasingly resorting to more sophisticated techniques to produce fake documents, trying to deceive criminal polices and hamper their work. Having an updated past counterfeited documents...