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Previous analytic approaches for all-optical networks have only allowed a random wavelength assignment policy in spite of the fact that network performance can be improved by other wavelength assignment policies such as first-fit wavelength assignment. In this paper, we develop an approximate analytic method to allow flexible wavelength assignment policies(More)
It is pragmatically important to know the comparative prognoses of bipolar, unipolar and subthreshold depressions after they present to clinical attention. Previous studies focusing on bipolar and/or unipolar depressions have questionable generalizability because of overrepresentation of inpatients and/or refractory patients, and no study has yet focused on(More)
It is true that in all-optical networks, network performance can be improved by wavelength conversion. However, the switching node with wavelength conversion capability is still costly, and the number of such nodes should be limited in the network. In this paper, a performance optimization problem is treated in all-optical networks. We propose a heuristic(More)
We study routing methods in all–optical switching networks. In all–optical switching networks, the connection with more hops encounters more call blocking, and it is especially true in optical networks with no wavelength conversions. We therefore consider an alternate routing method with limited trunk reservation in which connections with more hops are(More)
This document presents the conceptual design of a new generation network architecture. It is based on the discussions at 14 meetings and 2 seminars, which were held during an 11-month period beginning in May 2006 and attended primarily by the Network The future holds a computing environment characterized by embedded and pervasive computing and networking(More)
We develop a method of high-speed buffer management for output-buffered photonic packet switches. The use of optical fiber delay lines is a promising solution to constructing optical buffers. The buffer manager determines packet delays in the fiber delay line buffer before the packets arrive at the buffer. We propose a buffer management method based on a(More)
The mechanism of the neuroprotective effect of hyperbaric oxygenation remains unclear although its clinical benefits have been well recognized for human ischaemic neuronal disease. The preventive effect of hyperbaric oxygenation against delayed neuronal death was investigated in the gerbil following transient forebrain ischaemia. Delayed neuronal death in(More)
A novel photonic packet routing network based on multi-wavelength label switch using fiber Bragg gratings is proposed. All-optical multi-wavelength label recognision and 10Gbit/s burst payload data transportation are demonstrated experimentally for the first time. Introduction A photonic circuit-based network with wavelength division multiplexing (WDM)(More)