Consider a packet walking along a directed graph with each node having two edges directed out. The packet is headed towards one of N destinations, chosen according to a probability distribution p . At each step, the packet is forced to use a nonpreferred edge with some probability q, independently of past events. Using information theory and sequential analysis, it is shown that the mean number...

We consider the problem of transferring data with a xed level of reliability over a discrete time channel whose characteristics vary with time, with a constraint on the average delay su ered by the data and a constraint on peak transmitter power. We assume that the channel state is known to the transmitter at the beginning of each slot, and seek transmission policies that minimize the average p...

In this paper, we study cost efficient multi-copy spraying algorithm for routing in Delay Tolerant Networks (DTN) in which source-to-destination path does not exist most of the time. We present a novel idea and the corresponding algorithm for achieving the average minimum cost of packet transmission while maintaining the desired delivery rate by the given deadline. The number of message copies ...

In this paper, we describe a RAT (radio access technology) agnostic approach referred to as OMMA (Opportunistic Multi-MAC Aggregation) that can aggregate multiple RATs operating over independent spectral bands. Aggregation and/or traffic shaping is performed above the air interface protocol stacks but below the IP layer. We investigate the problem of minimizing the average packet latency (the s...

conclusions: in this study, delay in diagnosis was similar to other studies. educating physicians to careful history taking especially in the case of ibp, non-musculoskeletal symptoms such as uveitis and precise physical examination are important in early diagnosis. patients and methods: sixty patients, (53 males, 7 females) with a diagnosis of as according to the modified new york criteria wer...

introduction: pulmonary tuberculosis is major problem worldwide and it is estimated one third the world population are already infected and each year 9 million people develop full blown tuberculosis of these 3 million die of the disease, annually. delay in diagnosis and treatment are major problems that play a significant role in all aspect of the disease from patient treatment to transmission ...