Repositório IC-Online

Institution's Scientific Repository

IC-Online, the Institutional Repository of Scientific Information of the Polytechnic of Leiria (IPLeiria), is part of the RCAAP Project (Open Access Scientific Repositories of Portugal). Its main objectives are to organise, preserve and disseminate the scientific production of the Polytechnic of Leiria (IPLeiria), helping to increase the visibility and impact of the institution's scientific publications.

The IC-Online Repository includes various types of digital documents, such as articles from national and international scientific journals, papers from congresses and conferences, master's dissertations and doctoral theses, among others.

Política Institucional de Acesso Livre do Politécnico de Leiria (Despacho nº 124/2018)
Regras de afiliação do Politécnico de Leiria (Despacho nº 228/2020)
Normas de atribuição de identificadores DOI, ISBN e DL (Despacho nº 257/2024)
Apoio à investigação

Email repositorio@ipleiria.pt

Recent Submissions

Knowledge extraction guided by ontologies: Database marketing application

Publication . Mota Pinto, Filipe; Guarda, Teresa

The knowledge extraction in large databases has being known as a long term and interactive project. In spite of such complexity and different options for the knowledge achievement, there is a research opportunity that could be explored, throughout the ontologies support. Then this support may be used for knowledge sharing and reuse. This paper describes a research of an ontological approach for leveraging semantic content of ontologies to improve knowledge extraction in a oil company marketing databases. We attain to analyze how ontologies and knowledge discovery process may interoperate and present our efforts to propose a possible framework for a formal integration.

2011Conference object

Open access

Assistive mobile software for public transportation

Publication . Silva, João De Sousa E; Silva, Catarina; Marcelino, Luís; Ferreira, Rui; Pereira, António

The need of mobility on public transport for persons with visual impairment is mandatory. While traveling on a public transport, the simple ability to know the current location is almost impossible for such persons. To overcome this hurdle, we developed an assistive application that can alert its user to the proximity of all public transportation stops, giving emphasis to the chosen final stop. The application is adjustable to any transportation system and is particularly relevant to use in public transports that do not have any audio system available. The developed prototype runs on an Android OS device equipped with Global Positioning System (GPS). To ensure the highest possible level of reliability and to make it predictable to users, the application's architecture is free of as much dependencies as possible. Therefore, only GPS, or other localization mechanism, is required. The interface was designed to be suitable not only for talkback (Android's inbuilt screen-reader) aimed at blind users, but also for people with low vision that can still use their sight to check the screen. Thus, it was meant to be graphically simple and unobtrusive. It was tested by visual impaired persons leading to the conclusion that it demonstrates an existing need, and opens a new perspective in public transportation's accessibility.

2011Conference object

Open access

Forum participation plugin for Moodle: Development and Discussion

Publication . Muñoz, Andrés; Delgado, Ramiro; Rubio, Enrique; Grilo, Carlos; Basto-Fernandes, Vitor

At present, a large amount of software has been created to analyze social networks, such as libraries to access online social networking APIs, software to draw graphs and tools to use and analyze networks. In fact, and because of the use of Moodle as standard Learning Management System at the University of Las Palmas de Gran Canaria, in 2009 was born the idea of creating a plugin for Moodle capable of analyzing forums in which students participate and of identifying the major players within the student network. This work is about the present state of such plugin, which provides useful information to teachers so that, through the use of social network analysis, allows them to make decisions to improve and promote participatory education. Here, we show the application of the plugin to three case studies, in two different universities, which allowed to evaluate its usefulness and to compare the information according to the variables that influenced each case study.

2017-12-14Journal article

Open access

libboincexec: A Generic Virtualization Approach for the BOINC Middleware

Publication . Ferreira, Diogo; Araujo, Filipe; Domingues, Patricio

BOINC is a client-server desktop grid middleware that has grown to power very large computational projects. BOINC clients request computing jobs to a central server and run them alongside other regular applications. Unfortunately, this kind of execution causes two kinds of problems. Firstly, developers must port their application to every single operating system target, which usually means maintaining several different versions of the same application. Secondly, any application running natively on desktop grid hardware is a potential security threat to the volunteer client. During the course of this research we sought an efficient and generic method for alternative execution of jobs in BOINC clients. Our approach is strongly guided by the principles of non-intrusiveness and contains two main components. The first is a library, libboincexec, which is able to control several virtual machines monitors. The second is a modified BOINC wrapper that provides the glue between libboincexec and the middleware. Through the use of this solution we are able to effectively use virtual machines to perform computation on desktop grids. This computation is inherently safe because virtual machines provide sand boxing. Additionally, by targeting the same virtual operating system, the problem of maintaining different versions of an application does not exist, thereby solving the heterogeneity problem of desktop grid nodes.

2011-05Conference paper

Open access

AMIGA - An Interactive Musical Environment for Gerontechnology

Publication . Reis, Lee Scott; Reis, Gustavo; Barroso, João; Pereira, António

Benefits provided by music in humans have been reinforced through several studies, mainly by active participation in musical therapy sessons, with surprising results in physical and psychological rehabilitation. However, all the previous implemented approaches require specialized hardware to function and complex configurations to set-up. We define a computational system focused on the elderly to allow musical expressiveness through motion, solely using the resources available in an ordinary home computer. To evaluate our approach, we developed a prototype and piloted acceptance tests on several senior citizens, with an average age of eighty-three. Our experiments showed high levels of interest from the senior citizens, denoting positive capabilities of well-being and life quality enrichment. The performed experiments have also shown that an ordinary computer is capable of performing the proposed methodology, without any restriction.

2012Conference proceedings

Open access