Results 11 to 20 of about 19,444 (96)
Low-Cost DLW Setup for Fabrication of Photonics-Integrated Circuits [PDF]
MicromachinesThe development of photonic-integrated circuits (PICs) for data communication, sensing, and quantum computing is hindered by the high complexity and cost of traditional fabrication methods, which rely on expensive equipment, limiting accessibility for ...
André Moreira +3 more
doaj +2 more sources
Study of Flow Rate Measurements Derived from Temperature Profiles of an Emulated Well by a Laboratory Prototype [PDF]
Sensors, 2019 The objective of this work is the study of the procedure for flow rate measurement derived from temperature profiles. This method is deemed appropriate because of the inability to mount conventional flow meters in multiple-zone oil wells. In this work, a
Werbet L. A. Silva +5 more
doaj +2 more sources
Frequency-Resolved Dynamic Functional Connectivity Reveals Scale-Stable Features of Connectivity-States [PDF]
Frontiers in Human Neuroscience, 2018 Investigating temporal variability of functional connectivity is an emerging field in connectomics. Entering dynamic functional connectivity by applying sliding window techniques on resting-state fMRI (rs-fMRI) time courses emerged from this topic.
Markus Goldhacker +6 more
doaj +2 more sources
Unveiling the Biometric Potential of Finger‐Based ECG Signals [PDF]
Computational Intelligence and Neuroscience, Volume 2011, Issue 1, 2011., 2011 The ECG signal has been shown to contain relevant information for human identification. Even though results validate the potential of these signals, data acquisition methods and apparatus explored so far compromise user acceptability, requiring the acquisition of ECG at the chest. In this paper, we propose a finger‐based ECG biometric system, that uses
André Lourenço +3 more
wiley +2 more sources
Domótica e a requalificação de edifícios [PDF]
, 1994 Para a elaboração deste artigo técnico foi necessário adoptar uma estrutura que possibilitasse fornecer um estudo teóricoprático, transversal e equilibrado, das diferentes tecnologias domóticas. Inicialmente realizou-se um pequeno estudo teórico das
A Achache +6 more
core +1 more source
A High‐Performance Stand‐Alone Solar PV Power System for LED Lighting
International Scholarly Research Notices, Volume 2013, Issue 1, 2013., 2013 This paper presents new improvements and real result of a stand‐alone photovoltaic power system for LED lighting that was developed previously. The actual system, during day, charges a lead acid battery using MPPT algorithm for power transfer optimization, and, during night, it supervises battery discharge and controls the current in the power LED ...
José António Barros Vieira +3 more
wiley +1 more source
Compact, Frequency Reconfigurable, Printed Monopole Antenna
International Journal of Antennas and Propagation, Volume 2012, Issue 1, 2012., 2012 This paper proposes a possible implementation of a compact printed monopole antenna, useful to operate in UMTS and WLAN bands. In order to accomplish that, a miniaturization technique based on the application of chip inductors is used in conjunction with frequency reconfiguration capability.
Ricardo Gonçalves +3 more
wiley +1 more source
Transformadores. Funcionamento em paralelo na rede elétrica [PDF]
, 2011 O crescimento do consumo de energia elétrica verificado nos últimos anos e o aparecimento e evolução dos sistemas de produção de energia por fontes de energia renováveis, como a eólica e fotovoltaica, levam a que sejam necessários ajustes no sistema ...
Silveira, Alexandre Miguel Marques da
core +2 more sources
Veículos eléctricos. Características e tipos de motores [PDF]
, 2009 Os impactos ambientais e económicos dos combustíveis fósseis têm uma forte proveniência do sector dos transportes. Este facto tem motivado, nas últimas décadas um aumento do desenvolvimento dos veículos eléctricos, principalmente, das soluções ...
Melo, Pedro Miguel Azevedo de Sousa
core +2 more sources
Cerâmica, 2015 ResumoHoje em dia a diversidade de materiais disponíveis para uso em engenharia é muito grande, há um aumento de materiais específicos para cada tipo de aplicação.
E. A. Santos +6 more
doaj +1 more source