The premises of this paper are 1) security is application dependent because application semantics directly influence proper protection; but 2) applications are generally too complex to be trusted to implement security as specified by the given security policy. These problems are aggravated if the application operates over time and space. This paper proposes the use of a simple program (a “wrapp...

Applications of computer communications can be used in many ABSTRACT ways in education. In this article an overview is given of a number of categories of computer communications applications in learning-related activities. Particular attention is given to a new type of system called a course-support environment. In this type of system a database is integrated with Web-based tools and applicatio...

Responding to the long-standing interest of new media scholars in online participation as a mechanism for political and cultural democracy and empowerment, this article elaborates a critique of online participation. It examines the ways in which online participation has been economized at a fundamental level – the level at which data is transmitted – and argues that this economization draws int...

Biology has moved from a bench-based discipline to a bioinformational science in modern times but application of computational and analytical methods of informatics in it is still a problem for many researchers and students of biology. We suggest to integrate cost effective and practical combination of the real and the virtual laboratories into the undergraduate biological science curriculum. T...

Presents a technique for modeling skin effect losses in inductors. Includes a model written in Verilog-A as well as a model based on a new type of basic element named a frac-pole. Permission to make copies, either paper or electronic, of this work for personal or classroom use is granted without fee provided that the copies are not made or distributed for profit or commercial advantage and that...

We report on the experimental observation of a new type of polarization-locked vector soliton in a passively mode-locked fiber laser. The vector soliton is characterized by the fact that not only are the two orthogonally polarized soliton components phase-locked, but also one of the components has a double-humped intensity profile. Multiple phase-locked high-order vector solitons with identical...