34 documents found, page 1 of 4
Influence of Different Agro-Food Waste on Ammonia and Greenhouse Gas Emissions ...
Pereira, José; Costa, Telma; Figueiredo, Vítor; Marques, Francisco; Perdigão, Adelaide; Brás, Isabel; Ferreira Silva, Maria ElisabeteComposting is one of the best organic waste management techniques, with zero waste; however, it generates environmental impacts. The objective of this study was to evaluate the emission of NH3, N2O, CO2, and CH4 from the composting of olive, elderberry, and grape agro-food waste. The experiment was carried out using reactors receiving straw as control and three treatments receiving mixtures of straw and olive, ...
Open-source RISC-V Input/Output Physical Memory Protection (IOPMP) IP
Cunha, Luís Carlos Costa; Marques, Francisco; Rodriguez, Manuel; Gomes, Tiago Manuel Ribeiro; Sá, Bruno; Pinto, SandroThis work describes the design and implementation of an open-source I/O Physical Memory Protection (IOPMP) IP compliant with the RISC-V IOPMP Architecture Specification (version 1.0.0-draft5). So far, we have designed and implemented an IP with the mandatory features supporting the Full Model. We functionally validated and evaluated this IP within a CVA6-based SoC. Future plans include updating the IP to comply...
Holistic RISC-V virtualization: CVA6-based SoC
Sá, Bruno; Marques, Francisco; Rodriguez, Manuel; Martins, José Carvalho; Pinto, SandroThis work describes our efforts to provide a holistic hardware RISC-V virtualization SoC based on the CVA6 core. At the core level, we implemented hardware support for virtualization through the ratified Hypervisor instruction set architecture (ISA) extension version 1.0. At the system level, we are working on providing reference open-source IPs for two nonISA components needed to build a virtualization-aware p...
Mitigating Ammonia and Greenhouse Gas Emissions from Stored Pig Slurry Using Ch...
Pereira, José L.S.; Perdigão, Adelaide; Marques, Francisco; Ferreira Wessel, Dulcineia; Trindade, Henrique; Fangueiro, DavidSlurry storage is a significant source of NH3 and greenhouse gas (GHG) emissions. The aim of this laboratory study was to assess the effects of different chemical additives and biochars on the emissions of NH3, N2O, CO2, and CH4 during the short-term storage of pig slurry. The experiment was performed using Kilner jars filled with raw slurry as control and six treatment additives (5% w/w): acidified slurry, alk...
Effect of Different Tannery Sludge Composts on the Production of Ryegrass: A Po...
Perdigão, Adelaide; Marques, Francisco; Pereira, José L.S.Background: Tannery industry produces high amounts of nutrient rich sludges that can be used as organic fertilizers. Objective: The aim of this study was to evaluate the fertilizing potential of composted tannery sludge. Methods: A pot experiment was carried out with ryegrass (Lolium perenne L.) to test two different composts: 2.0 kg dry matter (DM) tannery fatty sludge + 1.5 kg DM sheep manure + 1.5 kg DM whea...
Timpanoplastias: Casuística de 10 anos
Mota, Clara Pedro; Marques, Francisco; André, Suzete; Lousan, NunoObjetivos: Análise de fatores preditivos de sucesso de timpanoplastias realizadas em doentes com otite média crónica não colesteatomatosa (OMC-NC). Desenho do Estudo: coorte, retrospetivo. Material e Métodos: Análise das timpanoplastias realizadas em doentes com OMC-NC entre 2010 e 2019, no Centro Hospitalar do Tâmega e Sousa. Resultados: Foram analisados 366 procedimentos em 312 doentes, com idades comp...
Implementacão do RISC-V IOPMP no CVA6 SoC
Marques, Francisco; Sá, Bruno Vilaça; Pinto, SandroAtualmente, a segurança é um dos requisitos mais importantes na computação moderna. Com o aparecimento de plataformas heterogéneas compostas por várias unidades de processamento, é necessário desenvolver mecanismos de proteção que garantam um elevado grau de isolamento e segurança do sistema. Uma área proeminente que visa melhorar a segurança de uma plataforma, é o isolamento espacial da memória. É neste contex...
Mitigating ammonia and greenhouse gas emissions from stored pig slurry using ch...
Pereira, José L. S.; Perdigão, Adelaide; Marques, Francisco; Wessel, Dulcineia F.; Trindade, Henrique; Fangueiro, David: Slurry storage is a significant source of NH3 and greenhouse gas (GHG) emissions. The aim of this laboratory study was to assess the effects of different chemical additives and biochars on the emissions of NH3 , N2O, CO2 , and CH4 during the short-term storage of pig slurry. The experiment was performed using Kilner jars filled with raw slurry as control and six treatment additives (5% w/w): acidified slurry,...
Evaluation of Tomato-Based Packing Material for Retention of Ammonia, Nitrous O...
Pereira, José L.S.; Perdigão, Adelaide; Marques, Francisco; Coelho, Catarina; Mota, Mariana; Fangueiro, DavidBiofilters are an effective air pollution control technology to break down gaseous contaminants and produce innocuous end products. This laboratory study aimed to evaluate a biofilter media, mainly composed by tomato waste, as packing material to reduce NH3, N2O, CO2 and CH4 losses from stored pig slurry. Three mixtures of packing materials, with and without oxalic acid, were arranged in treatments, namely: mix...
Evaluation of tomato-based packing material for retention of ammonia, nitrous o...
Pereira, José L.S.; Perdigão, Adelaide; Marques, Francisco; Coelho, Catarina; Mota, Mariana; Fangueiro, DavidBiofilters are an effective air pollution control technology to break down gaseous contaminants and produce innocuous end products. This laboratory study aimed to evaluate a biofilter media, mainly composed by tomato waste, as packing material to reduce NH3, N2O, CO2 and CH4 losses from stored pig slurry. Three mixtures of packing materials, with and without oxalic acid, were arranged in treatments, namely: mix...