The rapid development of methods that select over/under expressed genes from microarray experiments have not yet matched the need for tools that identify informational profiles that differentiate between experimental conditions such as time, treatment and phenotype. Uncertainty arises when methods devoted to identify significantly expressed genes are evaluated: do all microarray analysis method...

The analysis of big data, although potentially a very rewarding task, can present difficulties due to the complexity inherent to such datasets. We suggest that conceptual graphs provide a mechanism for representing knowledge about a domain that can also be used as a useful scaffold for big data analysis. Conceptual graphs may be used as a means to collaboratively build up a robust model forming...

Considering previous theoretical models and empirical studies, this study’s goal is to develop a tool for assessing the success of a web-based Information System and to evaluate it experimentally. This is Audits, a system used by a non-profitable public organization, O.P.E.K.E.P.E. Success is evaluated based on system’s effects on the employees and the organization, as well as the satisfaction ...

In Concurrent Engineering, several participants (designers, managers,...) stemming from different specialities, collaborate in order to build a system. In this paper, we propose a representation with the Conceptual Graph formalism to keep a trace of the design process in Concurrent Engineering as a project memory. Such design process is a cycle of individual design and collaborative evaluation....

Article history: Received 17 January 2015 Revised 31 March 2015 Accepted 3 April 2015 Given a query (a health question), retrieval of relevant frequently asked questions (FAQs) is essential as the FAQs provide both reliable and readable information to healthcare consumers. The retrieval requires the estimation of the semantic similarity between the query and each FAQ. The similarity estimation ...

In this paper we analyze and discuss schema quality in the schema integration process. In doing so, we apply a framework for evaluating the quality of a conceptual schema (e.g. conceptual database schema). In our analysis we combine quality factors and quality metrics with the schema integration process, which is often described as having four distinct phases: pre-integration, comparison of the...

An open distributed environment can be perceived as a service market where services are freely ooered and requested. Any infrastructure which seeks to provide appropriate mechanisms for such environments has to include some mediator functionality to bring together matching service requests and service ooers. The matching algorithm that the mediator must perform commonly builds upon an IDL{based...

A pattern identifies a problem and provides the specification of a generic solution to that problem. Conceptual modelling patterns are aimed at representing a specific structure of knowledge that appears in different domains. Roles are meant to capture dynamic and temporal aspects of realworld objects. This paper identifies common semantics of different role models found in the literature. More...

Based upon a simple vacuum Lagrangian, comprising cosmological and quadratic scalar field terms, a cosmological model is presented whose history is indistinguishable from that of an innocuous low-density cold dark matter (CDM) universe, but whose future is very much shorter. For sensible values of the deceleration parameter (0 < q 0 < 1), its age is greater than 85% of the Hubble time, thus res...

The problem of judging the effectiveness of a course in general, and of explanations in particular, is certainly one of the most sensible areas in intelligent tutoring systems. In this paper, we present an explanation agent, whose aim is to evaluate the quality of explanations presented to learners. He has two objectives : discovering the source of learner’s misunderstandings by taking into acc...