Francesco Paolo Culcasi

Developing of a neural system, a Mamdany-type fuzzy inference system and a Sugeno type fuzzy inference system for the identification of a volunteer position/activity.

Simple smart system to monitor and enhance the environmental comfort of the building occupants.
The application is composed of:

• a WSN, developed in Contiki, whose goal is to monitor light and temperature of several rooms;
• an Android application that allows rooms' occupants to share their opinion about the living environment. Data are sent to a web database. The application is based on my bachelor's degree thesis (more specifically the studies on "Comfort evaluation criteria");
• a non-constrained node, developed in Californium, which acts as Relay between sensor nodes of the WSN, that periodically switch off their radio for energy conservation reasons, and the web database. In particular the relay is responsible for:
  • sending sensor's measurements to the database
  • computing and sending, for every room, the satisfaction index from occupants' opinion
• an actuation system simulated by LEDs placed on board of each sensor node.

Develope of an Android application for tracking social interactions (to co-operate with a clustering application).

The large diffusion of sensors happening at our days on one hand enables new concepts like smart houses, on the other hand carries with it new challenges due to their specific characteristic.
One of these challenges consists in being able to communicate with a device which, for energy saving reasons, spends most of its life in a low-power consumption state and periodically go back to an operative mode in order to perform its tasks, like measuring temperature, after which it goes to sleep again; while the device is in a sleepy state, it is not possible to contact it, e.g. in order to obtain the measured temperature value, neither is possible to know a-priori when it will wake up.

Implementation of one of the most important lossless algorithm for file/stream compression. LZ78 (Lempel-Ziv 1978) is a dictionary based compressor that implements a tree based dictionary built at runtime.

A packets connector allows conversion of packets from different interface and several formats (tcp client/server, netmap, pcap). This project aim to implement pcap packet read/written from/to pcap interfaces and files.
EXTRA: Added a test funtionality through virtual interface (see veth) that generates ARP packets.

Fully decentralized system, impemented by Akka toolkit (using the Actor's paradigm), that allows users to share files through a cluster of nodes.
Nodes join/leave the ring topology of the cluster using mechanisms freely inspired by CHORD protocol, to better manage the Distributed Hash Table.
Each joining node has to specify the size of disk to share with the application. Files are spread all over the nodes taking into account a load balancing technique. Each files can be found by searching for the node responsible for the hash value of the file name, or by looking for the hash value of a tag (part of the file name).
P2P file transfer implemented by a tailor-made actor protocol, with management of "fake transfer" (the request come from the owner of the file), rollback and load balanced re-distribution of the edited file.
Concurrent file access regulated by means of a Single Writer Multiple Reader policy.
A leaving node signals its abandon of the cluster to its neighbors in order to distribute all its owned files and DHT entries.
Last but not least, a simple recover mechanism is used to repair node crashes obtained through serialization of DTH entries and failure management of Akka.
EXTRA: A user-friendly GUI, realized with JavaFX, introduced for an easier and more intuitive utilization of the program.

This progect shows how IIR (Infnite Impulse Response) filters work, what are their possible applications, and their most common architectures.
An architecture has been choosen for the realization of a practical case. Through VHDL code some simulation tests are run to verify the correct behavior of the architecture. In conclusion an implementation on Xilinx Zync using the ISE Design Suite WEBPACK is presented.

The project consists in modeling a supermarket with N tills. The goal of this work is to study, with the help of OMNet++ simulator, the characterizing aspects of the supermarket, both from the point of view of customers (queueing time and response time experienced by each one) and from the standpoint of the owner of the supermarket (till idle time and load distribution) on varing arrival time probability distribution.