The error distribution of multicarrier modulation in a narrowband powerline communication (PLC) channel with memory is presented for an underground mining environment. In the environment, noise PLC originates from mains switchboard and blast control unit, connected to link. Using vectors measured channel, model obtained by training data using hidden Markov Fritchman state classification. modele...

We have constructed a flexible substrate for peer-to-peer communication. In addition to supporting a componentbased layered architecture, this substrate provides a novel modular authorization model and supports explicit monitoring of liveness guarantees.

Prolonged secure communication requires trust relationships that extend throughout a connection’s life cycle. Current tools to establish secure connections such as SSL/TLS and SSH authenticate PKI identities, validate credentials and authorize a trust relationship at the time a connection is established, but do not monitor the trust relationship there-

The Philips automatic telephone switchboard and directory information system PADIS provides a natural-language user interface to a telephone directory database. Using speech recognition and language understanding technologies, the system offers phone numbers, fax numbers, email addresses, and room numbers as well as direct call completion to a desired party. In this paper, we present the underl...

This work summarizes design, implementation and veriication processes of a digital telephone switchboard in the Esterel real-time programming environment. Our aim is to show the modularity in the description and of exibility the veriication process. We also show the control synchronization mechanisms to coordinate concurrent processes. The goal is to prevent in compile-time deadlock and lockout...

This paper describes a prosodically labeled database of conversational speech, representing a subset of the Switchboard and Callhome corpora. The prosodic transcription system is a simplification of the ToBI system aimed at phenomena that would be most useful for automatic transcription and linguistic analysis of conversational speech. The transcription method and a distributional analysis of t...