7 documents found, page 1 of 1
New TiO2-Ag/BEA composites with dual Ag-functionalization for specific adsorpti...
Ferreira, Ricardo; Regadera-Macías, Ana; Morales-Torres, Sergio; Pastrana-Martínez, Luisa M.; Lourenço, João P.; Silva, João M.; João, Isabel M.A new series of TiO2-Ag/BEA composites was specifically designed for use in filter/photo-reactors intercalated in air recirculation circuits in storage facilities for climacteric fruits. The sol-gel procedure for TiO2 deposition was combined with ionic exchange (IE) or incipient wet impregnation (IWI) techniques for Ag doping, with the proportions of both fractions also varying. The prepared materials were thor...
Otimização de formulações de extrusão de zeólitos recorrendo a planeamento fato...
Valle, Lívia; Ferreira, Ricardo; Fernandes, Auguste; Lourenço, João P.; Silva, João M.; João, Isabel M.; Ribeiro, FilipaUm planeamento de experiencias fatorial completo foi utilizado, abrangendo três variáveis independentes em dois níveis, para avaliar os principais parâmetros que influenciam o processo de extrusão. O estudo teve como objetivo otimizar as propriedades do extraído em relação ‡ microporosa ade e ‡ resistência mecânica. As variáveis investigadas incluíram o teor de zeólito (% mássica), a razão ácido/aglomerante (m/...
Real-time precision in 3D concrete printing: controlling layer morphology via m...
Silva, João M.; Wagner, Gabriel Mar Pinto; Silva, Rafael; Morais, António Francisco Nogueira; Ribeiro, João Paulo Silva; Mould, Sacha Trevelyan3D concrete printing (3DCP) requires precise adjustments to parameters to ensure accurate and high-quality prints. However, despite technological advancements, manual intervention still plays a prominent role in this process, leading to errors and inconsistencies in the final printed part. To address this issue, machine learning vision models have been developed and utilized to analyze captured images and video...
3DCP prefabrication for complex topographical contexts: a case study of rocky p...
Ribeiro, João Paulo Silva; Silva, João M.; Morais, António; Figueiredo, Bruno; Cruz, Paulo J. S.This article explores the potential offered by 3D Concrete Printing (3DCP) through the analysis of a practical application case: the qualification of rocky pontoons in marginal areas with spaces for recreational use and protectors of marine biodiversity. The purpose of the work is centred on the production of a set of platforms, divided into prefabricated concrete modules, which fit perfectly into the complex g...
Induction heating in nanoparticle impregnated zeolite
Morales Casero, Irene; MUÑOZ, MARTA; Costa, Catia S.; Alonso, Jose Maria; Silva, João M.; Multigner, Marta; Quijorna, Mario; Ribeiro, M. RosárioThe ultra-stable Y (H-USY) zeolite is used as catalyst for the conversion of plastic feedstocks into high added value products through catalytic cracking technologies. However, the energy requirements associated with these processes are still high. On the other hand, induction heating by magnetic nanoparticles has been exploited for different applications such as cancer treatment by magnetic hyperthermia, impro...
Intrusion Detection and Prevention in CoAP Wireless Sensor Networks Using Anoma...
Granjal, Jorge; Silva, João M.; Lourenço, Nuno António MarquesIt is well recognized that security will play a major role in enabling most of the applications envisioned for the Internet of Things (IoT). We must also note that most of such applications will employ sensing and actuating devices integrated with the Internet communications infrastructure and, from the minute such devices start to support end-to-end communications with external (Internet) hosts, they will be e...
Student engagement with statistical design of experiments by active learning pr...
João, Isabel; Silva, João M.This paper illustrates the use of design of experiments in an active learning environment in a new Master course in Quality and Environmental Engineering at a higher education institution in Portugal. The study took place in the unit of Advanced Techniques for Quality. The aim of this work is vto explain how in an active learning environment the students worked on projects designed to use fractional factorial d...