Natural language combinesnOuns and adjectives into noun phrases,, and links phrases by means of.p,repositions to form complex descriptiops of objects and topics. AUTONOTEZ, a file-orsented retrieval systeq, allows the user to employ such descriptions to characterize the items of information he wishes to store and retrieve. Tn addition. the system also cmstructs a network qpresentation of the us...

In this paper we propose the use of a network-based agent that represents mobile users in a Personal Communication Services (PCS) environment. The agent, called a user process, performs all the complex signaling functions on behalf of the mobile terminal, thus reducing the amount of signaling traffic that must travel over the valuable air interface. To achieve low call establishment delays, we ...

It is common that users or hosts in a large network are partitioned and organized as a hierarchical tree where children of the same parent form a group. Secure broadcasting intends to provide a secure communication channel from a sending principal to a group of legal receiving principals. Only legal receiving principals can decrypt the message, and illegal receiving principals cannot acquire an...

Mobile computing protocols are becoming one of the most important issues in state-of-the-art technologies. In this paper we will provide important issues in terms of modeling and simulation of mobile protocols. First, the survey discusses the theoretical issues in mobile or nomadic computing environment, afterwards some performance measurements papers are explained, they show simulations done t...

This paper presents a strategy for the support of Personal Communication Services in TINA compliant systems through the use of mobile agents. The paper reflects the vision of the EC/ACTS research project DOLMEN that has developed OSAM, an Open Service Architecture for fixed and Mobile environments. After introducing the principle of retailer federation in a multi-domain environment, the paper a...

This study tested two recall aids for the name generator procedure via a randomized web experiment with 447 college students, eliciting their personal networks. Compared to participants solely presented with the name generator, participants being prompted and probed to consult records saved in their communication devices provided more comprehensive network data and more weak ties. Furthermore, ...

As the cover range for the radio cells becomes gradually smaller than before, the procedures for mobile terminals call setup and control become complicated due to the high handoff frequency. The broadcast nature of WDM star couplers makes the handoff scheme easier and reduces the number of reconnections. In this study, we proposed a channel allocation algorithm, called pre-empted assigned offse...

Communication technology has been seeing rapid growth, characterized by new access networks (e.g., cellular, pager, wireless-IP) and end-devices (e.g., PDAs, twoway pagers, multi-model access devices). There have been several efforts at integrating services across such heterogeneity. However, little work has been done on identifying an underlying architecture for such an integration. We identif...