Resumo-Basicamente, quando se considera tráfego dinâmico e topologias com um número elevado de nós, utiliza-se o algoritmo de Dijkstra e modifica-se sua função custo de modo a otimizar o desempenho das redes ópticas. Nesse contexto, a contribuição deste artigo é de adaptar um algoritmo de roteamento disponível na literatura de redes ópticas multiplexadas em comprimento de onda para o cenário de redes elásticas e investigar seu desempenho considerando diversos algoritmos de roteamento utilizados na literatura. Consideram-se aspectos da camada física, tais como perdas e ganhos ao longo dos dispositivos, além do ruído de emissão espontânea amplificada gerado nos amplificadores ópticos.
Resumo-Neste artigo, objetiva-se analisar o desempenho do algoritmo de roteamento por série de potências, em termos de probabilidade de bloqueio de chamadas e número de iterações, em um cenário de rede óptica elástica, frente a duas variações do algoritmo de otimização bioinspirada utilizado em sua proposta original. Essa técnica se baseia em conceitos de inteligência artificial, em específico a estratégia de enxame de partículas, para otimização da função custo do algoritmo de roteamento.
A 2-month-old male domestic shorthair cat was referred to a private veterinary clinic with a history of dyspnea and inappetence. At the clinical examination, the cat was in poor body condition, with hyperthermia and abdominal distension. No major abnormalities were observed in the thoracic radiographs or abdominal ultrasound. A complete blood count revealed leukocytosis with neutrophilia. Although no clinical diagnosis was made, the cat received support therapy, but went into cardiac arrest and died. The cat was submitted for necropsy and the main gross finding was two white nodules on the ventral surface of the thoracic vertebrae (from T1 to T4). At the cut surface, the nodules were friable and filled with yellow exudate. The epidural space of the thoracic region was filled with yellowish viscous material. Histologically, the vertebrae were partially replaced by abscess formation characterized by a necrotic center with degenerate neutrophils, surrounded by fibrous connective tissue. The epidural space was filled with degenerate neutrophils, necrotic debris, fibrin, and intralesional colonies of gram-negative short rod-shaped to coccobacillary bacteria. Bacteriologic culture yielded Pasteurella multocida. This paper describes the gross, histological, and bacteriological features of a rare case of spinal epidural empyema caused by Pasteurella multocida in a cat.
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