74 documents found, page 1 of 8
Therapeutic properties of the phytochemical compounds of the species Cannabis s...
Torres, Sabrina; da Silva, Ellison; Silva, Iran; Lima, João; Silva, VitorBrazil is one of the most diverse countries in the world when it comes to its plant species, with about 46,096 plants in more than nine different ecosystems, making it an indispensable area for research involving phytotherapy. Among the species that present therapeutic interests is Cannabis sativa L., which is a shrub from the Moraceae family that contains about 400 compounds, including more than 60 cannabinoid...
Tratamento da hepatite C em Portugal: análise dos custos no Sistema Nacional de...
Silva, VitorEnquadramento: A hepatite C é uma doença infeciosa que afeta o fígado, causada pelo vírus da hepatite C (VHC) e transmitida principalmente por contacto com sangue contaminado [1]. Em 2014, a Agência Europeia do Medicamento (EMA) autorizou o uso do sofosbuvir (Sovaldi®), o primeiro antiviral de ação direta (AAD) para o tratamento da hepatite C, em toda a União Europeia [2]. Em Portugal, esse medicamento foi disp...
A robust real-time leather defect segmentation using YOLO
Silva, Vitor; Pinho, Rafaela de; Allahdad, Mehrab Khazraeiniay; Silva, Jorge; Ferreira, Manuel J.; Magalhães, Luís Gonzaga MendesNatural leather is a product made from animal skin which is treated through chemical procedure to preserve it. It is used in the manufacture of clothing, bags, furniture, automobile material, among others. Because of its capital value in industry, it is important to ensure its quality. Traditional inspection by human experts is expensive, time-consuming, and subjective to human errors. Consequently, automatic l...
Quality control using U-Net: detecting defects in leather
Allahdad, Mehrab Khazraeiniay; Pinho, Rafaela de; Silva, Jorge; Silva, Vitor; Ferreira, Manuel J.; Magalhães, Luís Gonzaga MendesRecently, there has been a significant amount of attention towards computer vision algorithms, particularly those that focus on semantic segmentation applications. This is due to the availability of big data to train models, as well as the computational ability of these algorithms. Among the various computer vision applications, the U-Net has gained popularity due to its reliable accuracy, simplicity in constru...
CMOS spectrophotometric microsystem for malaria detection
Ferreira, Gabriel Malheiro; Baptista, Vitória; Silva, Vitor; Veiga, Maria I.; Minas, Graça; Catarino, Susana OliveiraObjectives: Optical spectrophotometry has been explored to quantify Plasmodium falciparum malaria parasites at low parasitemia, with potential to overcome the limitations of detection in the current diagnostic methods. This work presents the design, simulation and fabrication of a CMOS microelectronic detection system to automatically quantify the presence of malaria parasites in a blood sample. Methods: The de...
Extraction of graphene’s RF impedance through thru-reflect-line calibration
Colmiais, Ivo Henrique Baltazar; Silva, Vitor; Borme, Jérôme; Alpuim, Pedro; Mendes, P. M.Graphene has unique properties that can be exploited for radiofrequency applications. Its characterization is key for the development of new graphene devices, circuits, and systems. Due to the two-dimensional nature of graphene, there are challenges in the methodology to extract relevant characteristics that are necessary for device design. In this work, the Thru-Reflect-Line (TRL) calibration was evaluated as ...
Bi-Objective Power Optimization of Radio Stripe Uplink Communications
Conceição, Filipe; Gomes, Marco; Silva, Vitor; Dinis, Rui; Antunes, Carlos HenggelerThe radio stripe (RS) system is a practical implementation of cell-free mMIMO, in which a set of multi-antenna access points (APs) serves at the same time-frequency resources the user equipment (UE) in the network. The APs are sequentially connected in a stripe, sharing the same fronthaul link to the central processing unit. This work considers an uplink power optimization problem that aims to enhance the netwo...
Towards RF graphene devices: A review
Colmiais, Ivo Henrique Baltazar; Silva, Vitor; Borme, Jérôme; Alpuim, P.; Mendes, Paulo M.Graphene has been targeted for a wide variety of applications due to its characteristics. It is a zero-bandgap material, has high conductivity, and high carrier mobility, which makes it a promising material for radiofrequency applications. This review examines the applications of graphene in the design of radiofrequency building blocks, their performance, and current hurdles. Initially, graphene passive devices...
Cement-Bonded Particleboards with Banana Pseudostem Waste : Physical Performanc...
Nunes, Lina; Cintura, Eleonora; Parracha, João Luís; Fernandes, Bruno; Silva, Vitor; Faria, PaulinaThis article evaluates the relevant properties of cement-bonded particleboards (CBPB) made with a portion of maritime pine (Pinus pinaster) particles replaced with an agricultural waste, banana pseudostem (Musa sp.). The industrial production of CBPB was simulated in the laboratory based on a reference composition defined by a manufacturing company. Test specimens were produced assuming 0%, 25%, 50% and 75% par...
Hyperspectral Parallel Image Compression on Edge GPUs
Ferraz, Óscar; Silva, Vitor; Falcao, GabrielEdge applications evolved into a variety of scenarios that include the acquisition and compression of immense amounts of images acquired in space remote environments such as satellites and drones, where characteristics such as power have to be properly balanced with constrained memory and parallel computational resources. The CCSDS-123 is a standard for lossless compression of multispectral and hyperspectral im...