We compare the specific angular momentum profiles of virialized dark halos in cold dark matter (CDM) and warm dark matter (WDM) models using high-resolution dissipationless simulations. The simulations were initialized using the same set of modes, except on small scales, where the power was suppressed in WDM below the filtering length. Remarkably, WDM as well as CDM halos are welldescribed by t...

Wavelength Division Multiplexed (WDM) networking technology has been identified as a suitable candidate for future wide area network (WAN) environments, due to its potential ability to meet rising demands of high bandwidth and low latency communication. As traffic demand in the Internet increases exponentially, Wavelength Division Multiplexing (WDM) networks with Terabits per second bandwidth p...

We present three deterministic parameterized algorithms for well-studied packing and matching problems, namely, Weighted q-Dimensional p-Matching ((q, p)-WDM) and Weighted qSet p-Packing ((q, p)-WSP). More specifically, we present an O(2.85043) time deterministic algorithm for (q, p)-WDM, an O(8.04143) time deterministic algorithm for the unweighted version of (3, p)-WDM, and an O((0.56201 · 2....

RECEIVED 16 JUNE 2005; REVISED 17 SEPTEMBER 2005; ACCEPTED 26 SEPTEMBER 2005; PUBLISHED 27 OCTOBER 2005 The passive optical network (PON) is an optical fiber based network architecture, which can provide much higher bandwidth in the access network compared to traditional copper-based networks. Incorporating wavelength-division multiplexing (WDM) in a PON allows one to support much higher bandwi...

Project funded by the European Community under the " Information Society Technologies " Programme (1998-2002) Scheduling in modern networks: state-of-the-art survey * Abstract We discuss several problems in the area of scheduling in WDM networks. We start with a short overview of WDM technologies. Then, we shortly describe scheduling on a single optical fiber, in a WDM LAN, and in a WDM WAN. In...

A wavelength division multiplexing radio-over-fiber (WDM-RoF) system that can support multiband radio signals based on an additional subcentral station (SCS) is proposed and demonstrated in this paper. The dispersion characteristics of the over fiber transmission are explored, we exploit improved structure consisting central (CS), SCS, base stations (BSs) to optimize antidispersion performance ...

This paper addresses the problem of multiple multicast in WDM networks. It presents three efficient algorithms to construct an optimal/sub-optimal multicast tree for each multicast and minimise the network congestion on wavelengths. The first two algorithm achieve an optimal network congestion for a specific class of networks whose all wavelengths are globally accessible and convertible at a un...

We investigate and quantify the impact of mixed (cold warm) dark matter models on large-scale structure observables. In this scenario, comes in two phases, a cold one (CDM) warm (WDM): presence latter causes suppression power spectrum which is allowed by current constraints may be detected present-day upcoming surveys. run large set $N$-body simulations order to build an efficient accurate emul...

Towards EÆ ient Pa ket Swit hing Metro WDM Networks Martin Maier, Martin Reisslein, and Adam Wolisz Abstra t| In this paper, we brie y overview the urrent state{of{the{art of opti al WDM networking. We thereby point out that the ubiquitous SONET/SDH{WDM metro rings are likely to be ome a serious bottlene k between high{speed lo al area networks/broadband a ess te hnologies and WDM ba kbone netw...

There are some common network control issues in IP over WDM(IP/ WDM) which includes network addressing, neighborhood discovery, routing behavior, connection setup and tear down, signaling mechanism, network access control and IP/ WDM protection and restoration. Among them network addressing and restoration are two major research area. In this paper these two issues have been discussed. This pap...