2014 This paper investigates, more rigorously, the diffraction of a powerful optical carrier propagating in an unguided communication channel (dry atmosphere). Four main relevant topics are considered i) the radial temperature distribution, ii) the average beamwidth parameter, iii) a dimensionless optical distortion figure of merit, and iv) the irradiance tailoring technique as a method to redu...

As the number of online communities (OCs) continues to increase, it is critical for an OC to satisfy users’ needs in order to encourage and retain their voluntary participation and contribution over time. Consistent with the IS Success model, we argue that information quality and system quality are two important antecedents of OC user satisfaction. However, little IS research has systematically...

Among the many benefits of ATM networking are the potential for connections with negotiated quality-of-service (QoS) guarantees and application-specific data management at network endpoints. In this paper we describe the architecture of a PCI bus host adapter for OC-3 and OC-12 ATM, focusing on challenges in the areas of buffer management and flow control, since these are vital to realizing the...

The ability to determine absolute distance to an object is one of the most basic measurements of remote sensing. Highprecision ranging has important applications in both large-scale manufacturing and in future tight formation-flying satellite missions, where rapid and precise measurements of absolute distance are critical for maintaining the relative pointing and position of the individual sate...

Snapshots of BGP tables and updates have been studied in the past to understand the convergence time and global routing stability at the protocol level. However, very little has been done to carefully analyze the causes behind these BGP updates and their impact on traffic. We bridge the gap by presenting a systematic approach for correlating Internal BGP(I-BGP) updates with packet traces in a l...

The theory of ultrabroadband multifrequency Raman generation is extended, for the first time, to allow for beam-propagation effects in one and two transverse dimensions. We show that a complex transverse structure develops even when diffraction is neglected. In the general case, we examine how the ultrabroadband multifrequency Raman generation process is affected by the intensity, phase quality...

The exploration of wireless alternatives to Broadband access has continued to be very important to service providers. The Line-of-Sight (LOS) Free Space Laser (FSL) and 60-GHz radios are two promising wireless alternatives since they fall in the FCC license –free spectrum and thereby mitigate the tremendous expense of spectrum acquisition. However, the FSL solution is very limited as a carrier ...

Synthesis and Photochemical Cyclization of a Novel EnyneCarbodiimide Michael Schmittel,* David Rodríguez 1 and Jens-Peter Steffen FB 8 OC1 (Chemie und Biologie), Universität Siegen, Adolf-Reichwein-Strasse, D-57068 Siegen, Germany. Tel. (+49)-271-4356, Fax (+49) 271-3270. E-mail: [email protected]. 1 Present address: Facultad de Química, Universidad de Santiago de Compostela, Spain...

This paper considers grooming of low speed traf-c into high speed lightpaths in a WDM based optical ring with a primary goal of reducing the cost of the entire system, which is dominated by the cost of the SONET transmission equipment connected to the optical ring. The paper attempts to enumerate the architectural options provided by SONET to arrive at a cost-eeective solution, including UPSR a...

Network traffic measurements can provide essential data for network research and operation. While Internet traffic has been heavily studied for several years, there are new characteristics of traffic having not been understood well brought by new applications for example P2P. It is difficult to get these traffic metrics due to the difficulty to measurement traffic on line for high speed link an...