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)
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Email repositorio@ipleiria.pt

Recent Submissions

A meshfree method with domain decomposition for Helmholtz boundary value problems

Publication . Valtchev, Svilen

In the framework of meshfree methods, we address the numerical solution of boundary value problems (BVP) for the non-homogeneous modified Helmholtz partial differential equation (PDE). In particular, the unknown solution of the BVP is calculated in two steps. First, a particular solution of the PDE is approximated by superposition of plane wave functions with different wavenumbers and directions of propagation. Then, the corresponding homogeneous BVP is solved, for the homogeneous part of the solution, using the classical method of fundamental solutions (MFS). The combination of these two meshfree techniques shows excellent numerical results for non-homogeneous BVPs posed in simple geometries and when the source term of the PDE is sufficiently regular. However, for more complex domains or when the source term is piecewise defined, the MFS fails to converge. We overcome this problem by coupling the MFS with Lions non-overlapping domain decomposition method. The proposed technique is tested for the modified Helmholtz PDE with a discontinuous source term, posed in an L-shaped domain.

2020-11Conference paper

Open access

Investigação qualitativa: em que ponto estamos?

Publication . Brandão, Catarina; Ribeiro, Jaime; Costa, António Pedro

2018-01Journal article

Open access

Acessibilidade no Ciclo de Vida do Software: Um exercício de maiêutica na engenharia de software

Publication . Silva, João de Sousa e; Goncalves, Ramiro; Pereira, António

A acessibilidade é bastante desqualificada na engenharia de software, o que compromete a sua vulgarização. Neste artigo, este problema é explicado e são evidenciadas algumas das suas consequências. São apresentados alguns conceitos chave da acessibilidade digital, que vão além da acessibilidade Web. A principal contribuição deste artigo é a apresentação de um esquisso de proposta de modelo de desenvolvimento, onde a acessibilidade está presente em todo o ciclo de vida de software, de uma forma explícita e justificada, tendo como base as quatro principais fases presentes na maioria dos modelos de desenvolvimento de software.

2017-06-13Conference paper

Restricted access

Seismic Retrofitting: Learning from Vernacular Architecture

Publication . Costa, A.; Varum, H.; Pinheiro Rodrigues, Hugo Filipe; Lourenço, P.B.; Vasconcelos, G.; Mariana R. Correia; Paulo B. Lourenço; Humberto Varum

Rammed earth is one of the oldest building materials in the world, and it is present in Portugal with a particular focus in the South of the country. The mechanical properties and the structural behaviour of rammed earth constructions have been the subject of study of many researchers in the recent years. This study is part of a broader research on vernacular seismic culture in Portugal. Numerical analyses were carried out to assess the influence of different retrofitting solutions in the behaviour and seismic performance of a rammed earth building, representative of the vernacular heritage of Alentejo region. Understating the structural fragilities of this type of constructions allowed determining the most appropriate retrofitting solutions.

2015Book part

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Seismic behaviour assessment of vernacular isolated buildings

Publication . Ortega, J; Vasconcelos, G; Lourenço, P; Pinheiro Rodrigues, Hugo Filipe; Varum, H.

This paper presents the numerical seismic analysis of isolated vernacular buildings characteristic of the Alentejo region, which is considered a medium seismic hazard region in Portugal.A representative isolated building was selected from a database, and a geometric model was defined for the numerical pushover analysis. Subsequently, a parametric analysis was carried out to assess the influence of distinct parameters on the seismic behaviour of such buildings.

2015Book part

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