Multiple Perspectives on Implementing Inter-University Computer Conferencing

The purpose of this symposium is to discuss the organization, design, implementation and preliminary evaluation of an inter-university collaborative learning experience that used computer mediated communication (CMC) to link graduate students in several universities to discuss issues related to distance education. The discussion is based on the Globaled project, a computer conference that was set up and implemented for the second time, during the Fall 1993 semester. Globaled was first implemented during the Spring of 1992. With the increasing offering of distance education as a graduate discipline in many traditional universities, Globaled, can be seen as a unique way to connect graduate students across States and countries to participate in discussions related to the field of distance education

Effect of scattering albedo on attenuation and polarization of light underwater

Recent work on underwater laser communication links uses polarization discrimination to improve system performance [Appl. Opt. 48, 328 (2009)] [in Proceedings of IEEE Oceans 2009 (IEEE, 2009), pp. 1–4]. In the laboratory, Maalox antacid is commonly used as a scattering agent. While its scattering function closely mimics that of natural seawaters, its scattering albedo can be much higher, as Maalox particles tend to be less absorbing. We present a series of experiments where Nigrosin dye is added to Maalox in order to more accurately recreate real-world absorption and scattering properties. We consider the effect that scattering albedo has on received power and the degree of depolarization of forward-scattered light in the context of underwater laser communication links