The basic objectives of future Internet are to increase the network capacity, to offer a practical real-time service, and to develop a feasible charging scheme. These objectives introduce very strict requirements for the trafilc control system. This paper presents a new simple approach for traffic management: Simple Integrated Media Access (SIMA). According to the SIMA concept each customer sha...

Digital interactive media augments interactive computing with video, audio, computer graphics and text, allowing multimedia presentations to be individually and dynamically tailored to the user. Multimedia, and particularly continuous media pose interesting problems for system designers, including those of latency and synchronization. These problems are especially evident when multimedia data i...

This paper discusses the need for automated alternate media solutions in a world of increasing mainstream inclusion. While society as a whole is shifting from educational, vocational and social segregation of people with disabilities towards inclusion and equal rights, the need to support the blind, partially sighted, dyslexic and other print impaired with textual material in alternate formats ...

The inhospitable powerline environment necessitates data link layer protocols capable of dealing with harsh transients. This paper outlines suitable protocols for the logical link and media access control sublayers. We propose a token bus mechanism for contention, and a hybrid Automatic Repeat reQuest (ARQ) system for error control. The performance of the protocol is evaluated using an Additive...

Wireless Sensor Networks impose additional challenges on Media Access Control mechanisms. Many schemes have been proposed that use either CSMA or TDMA protocols; however design of a CSMA protocol for WSNs must be more than a general purpose mechanism. In this work, we analyze the parameters of a CSMA layer and their affect on performance. We examine how to use upcalls to notify applications of ...

Many widely used Medium Access Control (MAC) protocols for sensor networks are based on contention, where concurrent access to the communication channel by multiple sensor nodes leads to so-called collisions. Collisions are a source of many undesirable properties of these MAC protocols such as reduced effective bandwidth, increased energy consumption and indeterministic data delivery. Hence, co...

Recently, there has been considerable interest in attribute based access control (ABAC) to overcome the limitations of the dominant access control models (i.e, discretionary-DAC, mandatory-MAC and role based-RBAC) while unifying their advantages. Although some proposals for ABAC have been published, and even implemented and standardized, there is no consensus on precisely what is meant by ABAC ...

We examine the evidence of growing social media use among political elites in lowand middle-income countries, including in places where the propor‐ tion of actual voters on social media is small. We propose three ways to view this phenomenon of– first, as signaling, second, as a means for politicians to access elite populations, and third as a way to circumvent mainstream media and exercise dir...

In this paper, we propose a web synchronization method (WSM) to share operation data on a browser and synchronize output time of data among browsers in browser-based communications such as video conferencing and remote control services. WSM continually provides users with an environment for smooth browser-based communications even if users are in a heterogeneous environment where network delay ...