Socrates Varakliotis

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1. Introduction The Robust Audio Tool (RAT) allows users to achieve real-time multi-way communication over the Internet. It was initially intended for use in multiway conferences, but more recently is being used as an Internet audio broadcast application, by radio stations in the US and elsewhere. RAT can also be used in a point-to-point manner, and as a(More)
Sensors utilize a large number of heterogeneous technologies for a varied set of application environments. The sheer number of devices involved requires that this Internet be the Future Internet, with a core network based on IPv6 and a higher scalability in order to be able to address all the devices, sensors and things located around us. This capability to(More)
– Emerging Internet of Things (IoT)/Machine-to-Machine (M2M) systems require a transparent access to information and services through a seamless integration into the Future Internet. This integration exploits infrastructure and services found on the Internet by the IoT. On the one hand, the so-called Web of Things aims for direct Web connectivity by pushing(More)
In this paper we present a coding technique for 3-D animated wireframe models, suitable for Internet streaming. First we present the MPEG-4 like coding scheme with simple RTP packetisa-tion, and provide details of the achieved compression efficiency. Then, we describe a distortion metric for such a signal and we conduct experiments to study the effect of(More)
With the increasing popularity of wireless sensor networks in hostile environments it would be desirable to have more reliable ways of delivering collected information to its destination. With a common scenario involving nodes in a sensor network relaying data back to a gateway or router device, which is connected to a backhaul network, the question arises(More)
The Internet of Things (IoT) is envisaged as a unified network of `smaller' networks that live on the fringes of the Internet, such as systems that monitor and control buildings, industrial plants, the power grid, etc. The Internet Protocol (IP) has been promoted as the transport glue that implements this vision. Although we observe a converged view from(More)
Advances in the field of sensor networking, coupled with the increased level of ubiquity of wireless Internet access has given rise to the ability to support Mobile Sensor Network scenarios. The name Mobile Sensor Network refers to a group of sensor nodes that move together, collectively sensing the environment around them as their location changes. In this(More)