Matilde: uma constelação exuberante

Granuloma actínico de O’Brien: apresentação clínica exuberante

O'Brien’s actinic granuloma is a rare skin disease. Controversy continues over whether it should be considered a specific condition or a form of granuloma annulare located in sun-exposed areas. Its pathogenesis is unknown; however, the most widely accepted hypothesis suggests that solar radiation is the triggering factor. This paper describes the case of a 78-year old, fair-skinned male, who pr...

Tecnologia Móvel: Uma Tendência, Uma Realidade

Currently, mobility presents itself as a major innovation in historic technological revolution. From the first decade of this century, nothing compares to what happened in the field of Information Technology (IT), which is adding to market a range of news relating to infrastructure such as mobile computing hardware, software, computer networks, etc.. From a handheld as a wireless device, iPad, ...

Blind Joint Detection and Channel Estimation in Space-Frequency Diversity Systems Using Time-Varying Linear Constellation Precoding

Resumo—Este artigo formula um novo receptor para a decodificação cega de códigos espaço-frequência em sistemas multiantena. A proposta para o projeto do sinal transmitido combina espalhamento em frequência do tipo Vandermonde com uma precodificação linear de constelação variante no tempo. Esta última consiste em estender a rotação de constelação sobre múltiplos perı́odos de sı́mbolo. Explorando a...

Uma Ravat

1. Field of study and interest: My research has developed a framework for answering fundamental mathematical questions regarding stochastic problems. I have used this framework in realworld applications in power markets and financial risk management. My research is in the area of stochastic variational inequalities, particularly those arising from stochastic Nash games and equilibrium problems ...

Renormalization and Motivic Galois Theory Joint Work with Matilde Marcolli