32 documents found, page 1 of 4
Development of a hydrophone for measuring the propagation of acoustic waves in ...
Pereira, Anabela; Cardoso, Vanessa Fernandes; Martins, Marcos Silva; Fernandes, Nuno Alexandre Tavares Campos; Carvalho, Óscar Samuel NovaisIn the past years, the prevalence of neurodegenerative diseases has in-creased, highlighting the urgent need to better understand and combat these diseases. Innovative ultrasound treatments have shown promising results but require further investigation, particularly regarding the pene-tration of acoustic waves into the brain. This work focus on developing a hydrophone to study acoustic wave penetration in biolo...
DBD plasma-treated polyester fabric coated with doped PEDOT:PSS for thermoregul...
Magalhães, Cátia; Ribeiro, Ana Isabel Ferreira; Rodrigues, Rui; Meireles, Ângela; Alves, Alexandra C.; Rocha, João Pedro Costa; Pedroso de Lima, FábioThe manufacturing process of thermoregulation products with polyester (PES) fabric and conductive polymers such as poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonate) (PEDOT:PSS) with proper wearability, comfort, and high performance is still a challenge due to low adhesion, environment instability and nonuniform coatings. This study presents a simple and effective method for producing thermoreg...
Knitted textile KTPs for instrumented underwater building systems
Monteiro, Filipa Maria Barbosa Faria; Pereira, E. N. B.; Almeida, João Alberto Pinheiro Pereira; Cruz, Fábio Quintas; Barajas, Diddyer Alexander Prada[Excerpt] The main scope of this study was to assess the potential of knitted textiles for underwater instrumented underwater building systems, using textile knitted preforms (multi-shape; multimaterial; etc…), using natural fibres (Hemp, Linen and Cotton).
Marine sensors: recent advances and challenges
Gonçalves, L. M.; Martins, Marcos Silva; Lima, Rui Alberto Madeira Macedo; Minas, Graça[Excerpt] The ocean has a huge impact on our way of life; therefore, there is a need to monitor and protect its biodiversity. Additionally, the ocean industrial potential for health, minerals, and oil has promoted the need for constant and real-time monitoring. Due to all of these concerns, it is important to develop efficient and smart marine sensors to improve our knowledge of the sea environment and to suppo...
Wave profile and tide monitoring system for scalable implementation
Rocha, J. L.; Matos, Tiago; Faria, C. L.; Penso, Camila Maria Ramos Aires Moreira; Martins, Marcos Silva; Gomes, P. A.; Gonçalves, L. M.Presentation of a wave profile and tide monitoring system, with low-cost and low-power pressure sensors connected to a datalogger in a wired or acustic network.
Wave profile and tide monitoring system for scalable implementation
Rocha, J. L.; Matos, Tiago; Faria, C. L.; Penso, Camila Maria Ramos Aires Moreira; Martins, Marcos Silva; Gomes, P. A.; Gonçalves, L. M.A versatile, miniaturized, cost-effective, low-power wave profile and tide monitoring system, capable of long-term and scalable deployment, was developed to integrate pressure and temperature sensors in an RS485 network, for standalone operation with organized memory or real-time shared data monitoring. The pressure and temperature sensors are controlled by low-power microcontrollers, that communicate the data ...
Hemp-based knitted textile pre-forms stabilized using biodegradable polymers fo...
Mehravani, Behnaz; Monteiro, Filipa Maria Barbosa Faria; Martins, Marcos Silva; Dourado, N.; Padrão, Jorge; Pereira, E. N. B.; Zille, Andrea[Excerpt] Knitted textiles provide high mechanical performance to organic designs enhancing the geometrical freedom of the buildings. Currently, knitted textile solutions for the construction industry are still heavily based on the use of fibers based on synthetic polymers, nevertheless, the shift to fibers based on natural polymers is beginning to be rediscovered. Hemp was used to produce Knitted Textile Pre-f...
Active neutralizing mats for corrosive chemical storage
Fernandes, Rui Daniel Vilaça; Melro, Liliana Sofia Silva Ferreira Pinto; Padrão, Jorge; Ribeiro, Ana Isabel Ferreira; Mehravani, BehnazLaboratories and industries that handle chemicals are ubiquitously prone to leakages. These may occur in storage rooms, cabinets or even in temporary locations, such as workbenches and shelves. A relevant number of these chemicals are corrosive, thus commercial products already exist to prevent material damage and injuries. One strategy consists of the use of absorbing mats, where few display neutralizing prope...
The challenge of long-distance over-the-air wireless links in the ocean: a surv...
Dinis, Hugo Daniel Costa; Rocha, João; Matos, Tiago André Rodrigues de; Gonçalves, L. M.; Martins, Marcos SilvaRobust wireless communication networks are a cornerstone of the modern world, allowing data to be transferred quickly and reliably. Establishing such a network at sea, a Maritime Internet of Things (MIoT), would enhance services related to safety and security at sea, environmental protection, and research. However, given the remote and harsh nature of the sea, installing robust wireless communication networks w...
Submarine cables as precursors of persistent systems for large scale oceans mon...
Tieppo, Marcos; Pereira, E. N. B.; Garcia, Laura González; Rolim, Margarida; Castanho, Emanuel; Matos, Aníbal; Silva, António; Ferreira, BrunoLong-term and reliable marine ecosystems monitoring is essential to address current environmental issues, including climate change and biodiversity threats. The existing oceans monitoring systems show clear data gaps, particularly when considering characteristics such as depth coverage or measured variables in deep and open seas. Over the last decades, the number of fixed and mobile platforms for in situ ocean ...