Keyword queries offer a convenient alternative to traditional SQL in querying relational databases with large, often unknown, schemas and instances. The challenge in answering such queries is to discover their intended semantics, construct the SQL queries that describe them and used them to retrieve the respective tuples. Existing approaches typically rely… (More)
The emergency situations deriving from natural disasters or large scale accidents represent one of the most critical activities in the health care system. We are all concerned about the necessity of a coordinated reaction and organization when there is a large number of people involved and time is a very precious aspect. This paper introduces a multi-agent… (More)
We propose the demonstration of Keymantic, a system for keyword-based searching in relational databases that does not require a-priori knowledge of instances held in a database. It finds numerous applications in situations where traditional keyword-based searching techniques are inappli-cable due to the unavailability of the database contents for the… (More)
This paper presents a new architectural approach for managing healthcare emergences and large scale disasters using agent-based applications. Such scenarios require a support that must be distributed, context-aware, reactive and autonomous. In the following, we will show how agent’s behaviour best fits to these requirements and how the agent… (More)
One of the most important feature of a MAS (Multi-Agent System) is the cooperation and the coordination among agents placed in distributed environments. Due to the high heterogeneity of agents and platforms, interoperability has become a key issue for the use of MASs in academic and industrial fields. Several approaches to interoperability proposed so far… (More)
Recent large-scale disasters and territorial emergencies, such as the Japan seaquake and Australian inundation, have brought to the attention the efficiency of the rescue operation. Such scenarios are unpredictable and require a prompt and coordinated reaction from the authorities. This paper presents an architectural approach for coordination and… (More)
Healthcare emergencies and large scale disasters are two of the most critic scenarios of the healthcare system. Such scenarios require a support that must be distributed, context-aware, reactive and autonomous. This paper presents an architectural approach for coordination based on the multi-agent technology. In the following, we will show how agents… (More)
In this paper we describe Keymantic, a framework for translating keyword queries into SQL queries by assuming that the only available information is the source metadata, i.e., schema and some external auxiliary information. Such a framework finds application when only intensional knowledge about the data source is available like in Data Integration Systems.