An Efficient Data Aggregation Algorithm for Cluster-based Sensor Network

Data aggregation in wireless sensor networks eliminates redundancy to improve bandwidth utilization and energy-efficiency of sensor nodes. One node, called the cluster leader, collects data from surrounding nodes and then sends the summarized information to upstream nodes. In this paper, we propose an algorithm to select a cluster leader that will perform data aggregation in a partially connected sensor network. The algorithm reduces the traffic flow inside the network by adaptively selecting the shortest route for packet routing to the cluster leader. We also describe a simulation framework for functional analysis of WSN applications taking our proposed algorithm as an exampl

A comparison of software platforms for Wireless Sensor Networks: MANTIS, TinyOS and ZigBee

Wireless sensor networks are characterized by very tight code size and power constraints, and by a lack of well-established standard software development platforms such as Posix. In this paper, we present a comparative study between a few fairly different such platforms, namely MANTIS, TinyOS and ZigBee, when considering them from the application developer's perspective, i.e. by focusing mostly on functional aspects, rather than on performance or code size. In other words, we compare both the tasking model used by these platforms and the API libraries they offer. Sensor network applications are basically event based, so most of the software platforms are also built on considering event handling mechanism, however some use a more traditional thread based model. In this paper, we consider implementations of a simple generic application in MAN- TIS, TinyOS and the Ember ZigBee development framework, with the goal of depicting major differences between these platforms, and suggesting a programming style aimed at maximizing portability between them

Banfi e Whitehead

Studio sulla ricezione da parte di A. Banfi della filosofia di A.N. Whitehea

L'evento del tempo

Studio sul concetto di temporalità nella filosofia di A.N. Whitehea

Body or Flesh? Merleau-Ponty's concept of the phenomenological reduction

Studio del concetto di riduzione fenomenologica in M. Merleau-Ponty, con confronti con la posizione di E. Husser

Le temps selon Whitehead: une approche phénoménologique

Studio del concetto di temporalità nella filosofia di A.N. Whitehead, con un raffronto con la posizione di E. Husser

La filosofia della matematica di Frege e la matematica ai tempi di Frege

Discussione dellla filosofia della matematica di G. Frege alla luce delle ricerche di I. Tot

Coscienza e alterità

Studio sulle "Meditazioni cartesiane" di E. Husser

Relations and the Irrelative: A Relationist Interpretation of Merleau-Ponty’s Ontology of the Flesh

Studio sul concetto di chiasma elaborato da M. Merleau-Ponty all'interno della propria riflessione ontologic

Hyperdialektik und die Entstehung der Subjektivität: zur Politik bei Merleau-Ponty

Studio sul concetto di soggettività in chiave politica nella filosofia di M. Merleau-Pont