There are several breast imaging techniques. These techniques have known an important evolution, either by improvement of existing techni- ques such as mammography, ultrasound and MRI, or by the emergence of new techniques such as tomosynthesis. The authors discuss the breast imaging techniques, their indications and features, as well as some technological aspects that correspond to recent improvements. Keyword...
The image-guided percutaneous liver biopsy is a useful tool which gives a reliable histological diagnosis without surgical intervention. However it isn’t a procedure free of complications. In the particular case of patients with a known oncologic context, accurate diagnosis and staging is essential for selecting the appropriate therapeutic approach. In these patients, imaging characterization should be preferre...
O presente trabalho tem como objeto de estudo a liderança e gestão de uma escola sob o ponto de vista dos diretores de turma, questionando estes acerca da promoção do sucesso escolar dos alunos. O sucesso escolar dos alunos tem sido uma temática amplamente discutida e está longe de reunir consensos, o que tem conduzido a sucessivas abordagens do tema. O sucesso escolar dos alunos depende de inúmeros fatores que...
Com o apoio RAADRI. ; The Surrogate Based Optimization is largely used in engineering design to find optimal performance characteristics of computational expensive simulations such as Finite Element Method (FEM). An original multiple surrogate based optimization criterion is proposed. The approach was tested on Loney‘s solenoid benchmark problem. Simulation results and comparisons with some traditional Kriging...
The paper presents a real-time transceiver using an Orthogonal Frequency-Division Multiplexing (OFDM) signaling scheme. The transceiver is implemented on a Field- Programmable Gate Array (FPGA) through Xilinx System Generator for DSP and includes all the blocks needed for the transmission path of OFDM. The transmitter frame can be reconfigured for different pilot and data schemes. In the receiver, time-domain s...
Tese de mestrado integrado. Engenharia Civil (especialização em Construções). Faculdade de Engenharia. Universidade do Porto. 2009
Com o apoio RAADRI. ; Supply chains are large-scale distribution networks in which multiple types of commodities are present. In this paper, the operations management in supply chains is posed as a tracking control problem. All inventory levels in the network should be kept as close as possible to the desired values over time. The supply chain state is disturbed due to client demand at the end nodes. A multiag...
This study aims to evaluate the survival rate of peritoneal rat macrophages after exposure to 3 & 6 Gy ionizing radiation fields, respectively. Cells were cultured in multiwell plates (37 ºC, 5% CO2), separated in 3 groups: GI–control; GII-cells irradiated with 3 Gy; GIII–cells irradiated with 6 Gy, using a 4 MeV particle accelerator. After irradiation cells were incubated for 2h30 = T0, 13...
Dissertação apresentada para obtenção do grau de Mestre em Engenharia do Ambiente, na Faculdade de Engenharia da Universidade do Porto, sob a orientação da Prof. Doutora Maria da Conceição M. Alvim Ferraz
As comunicações veiculares começam a despertar cada vez mais interesse, muito devido às novas potencialidades oferecidas pelo desenvolvimento das comunicações sem fio. Uma das mais promissoras tecnologias dedicadas à área das comunicações veiculares é o DSRC 5.9 GHz, que associado com a recente norma IEEE 802.11p é capaz de proporcionar comunicações fiáveis e robustas entre veículos. Neste documento são mostrad...
Financiadores do RCAAP | |||||||
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