Televisão: 50 anos

Sistemas de Televisão Digital

In this paper, we describe the design methodology and hardware implementation of a low-density parity-check (LDPC) code for a digital television (DTV) system. We begin the paper describing LDPC codes and the design strategies we used. We also provide some simulation results that show that the proposed code greatly outperforms codes used by other DTV standards. Finally, we provide details of the...

Potenciais Evocados Auditivos Em Indivíduos Acima De 50 Anos De Idade***** Auditory Evoked Potentials in Individuals over 50 Years

Background: auditory evoked potentials. Aim: to describe the results of brainstem auditory evoked potentials (PEATE), middle latency auditory evoked potentials (PEAML) and cognitive potential (P300) in individuals over 50 years. Method: this study was developed at the Speech and Hearing Investigation Laboratory in Auditory Evoked Potentials of the Speech-Language and Hearing Course of the Depar...

Diierent Capacities of a Digraph Jj Anos Kk Orner

The Shannon capacity of every induced subgraph of a perfect graph equals its clique number. However, for the co{normal powers of an odd cycle the super{multiplicativity of the clique number makes the determination of capacity one of the hardest problems in combinatorics. We study the asymptotic growth of induced subgraphs of some particular type in powers of a xed graph. In case of a simple gra...

Seguimento de 11 pacientes com transtorno bipolar por cinco anos

Objective: To study the long-term follow-up of patients with bipolar disorder (BPD). Method: Eleven outpatients with BPD type I were followed up naturalistically for five years at a university teaching hospital. The Clinical Global Impression Scale (BPD version) was used to evaluate the occurrence of affective episodes, and the Strauss-Carpenter Outcome Scale was used to evaluate social and occ...

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