Intellectual property is associated with the creative work needed to design clinical trials. Two approaches have developed to protect the intellectual property associated with multicentre trial protocols prior to site initiation. The 'open access' approach involves publishing the protocol, permitting easy access to the complete protocol. The main advantages of the open access approach are that ...

Linked Data enables people to access other users’ data stored in several places, distributed across theWeb. Current Linked Data mechanisms mostly provide an open environment where all data is freely accessible, which could discourage some people to provide sensitive data in the Linking Open Data (LOD) cloud. Although the existing Web Access Control (WAC) vocabulary restricts RDF documents to sp...

We analyze the capacity of ultra-wide band (UWB) wireless access networks supporting multimedia services by calculating the number of multimedia connections that can be supported in a UWB access network with IEEE 802.15.3 Medium Access Control (MAC) protocol, considering the overheads from different layers. We then propose how to increase the capacity by improving the MAC protocol design and pa...

We present a novel location-aware medium access protocol for wireless sensor networks. In this protocol, the contending nodes make use of their location information to reduce collisions and improve the overall performance. We study the application of this protocol to the problem of medium access in one-hop data-gathering applications. We evaluate it in terms of delay and energy consumption and ...

In wireless sensor networks (WNSs), the research on medium access control (Mac) protocol is one of the hot topic for researcher. And also, the MAC protocol is a determined factor for communication performance. In this paper, we proposed a novel energy efficient MAC protocol to improve the energy effectiveness. Based on the analysis on current existing MAC protocol, our protocol can adjust the d...

Emerging networked applications present significant challenges for traditional data management techniques for two reasons. First, they are based on data encoded in XML, LDAP directories, etc. that typically have complex inter-relationships. Second, the dynamic nature of networked applications and the need to integrate data from multiple sources results in data that is semior irregularly structu...

Nodes in a wireless network transmit messages through a shared medium. Thus, a Media Access Control (MAC) protocol is necessary to regulate and coordinate medium access. For some application areas it is necessary to have a deterministic MAC protocol which can give guarantees on message delay and channel throughput. Schedule based MAC protocols, based on time synchronization among nodes, are cur...

This document provides a problem statement, lists requirements, and captures design aspects for a GEOPRIV Layer 7 (L7) Location Configuration Protocol (LCP). This protocol aims to allow an end host to obtain location information, by value or by reference, from a Location Information Server (LIS) that is located in the access network. The obtained location information can then be used for a vari...

In this paper, we propose an approach to vehicle collision-avoidance system by broadcasting vehicles’ driving conditions via Inter-Vehicle Communication (IVC) networks. We study the use of Elimination Yield Nonpreemptive Priority Multiple Access (EY-NPMA) Medium Access Control (MAC) protocol. This protocol is used in the High Performance Radio LAN (HIPERLAN) system being developed in Europe. In...

Control/command processes require a transmission system with some characteristics like high reliability, low latency and strong guarantees on messages delivery. Concerning wire networks, field buses technologies like FIP offer this kind of service (periodic tasks, real time constraints...). Unfortunately, few wireless technologies can propose a communication system which respects such constrain...