DSpace Collection:

Caso de Estudo "Gestao da Segurança na Construção"

2026-07-15T07:00:30Z

Title: Caso de Estudo "Gestao da Segurança na Construção"

BIAXIAL BEHAVIOUR OF RC COLUMNS BUILT WITH PLAIN REBARS

2026-07-11T06:58:37Z

Title: BIAXIAL BEHAVIOUR OF RC COLUMNS BUILT WITH PLAIN REBARS Abstract: A considerable number of existing reinforced concrete (RC) buildings structures were designed before 80s, when the reinforcing bars had plain surface and prior to the enforcement of the modern seismic-oriented design codes. This paper presents the results of a recent experimental campaign performed on four full-scale RC columns representative of existing structures with plain reinforcing bars. The columns were tested under constant axial load and uniaxial or biaxial lateral cyclic loading until failure. An additional column, built with deformed reinforcing bars, was also tested. All specimens have square cross-section (30x30cm) and represent a cantilever with 1.5m of span. The main experimental results are presented and discussed. The influence of bond properties on the column behaviour is evidenced by differences observed between the cyclic response of similar specimens with plain and deformed bars. The effect of the lateral loading path on RC columns built with plain bars is also presented. (c) 2024, International Association for Earthquake Engineering. All rights reserved.

A Lei de Amara: Habitação e Digitalização

2026-06-03T06:50:28Z

Title: A Lei de Amara: Habitação e Digitalização

Soilgeosynthetic interaction

2026-05-30T06:45:10Z

Title: Soilgeosynthetic interaction Abstract: Abstract Soilgeosynthetic interaction mechanisms and soilgeosynthetic interface resistance are referred to in this chapter. Factors influencing soilgeosynthetic interaction, such as soil particle size, confinement stress, soil density, geosynthetic structure, soil type or alternative fill material, and cyclic loading, are analysed. The main relevance of soil particle size when the reinforcement is a geogrid is put forward. The influence of the soil moisture content on the behaviour of soilgeosynthetic interfaces and the use of alternative backfilling materials such as recycled construction and demolition materials are presented and discussed. The effects of cyclic loading on the interface behaviour under pull-out and direct shear are also described.

New Technologies for Earth Construction: 3D Printing, a Reality or a Mirage?

2026-05-30T06:45:07Z

Title: New Technologies for Earth Construction: 3D Printing, a Reality or a Mirage? Abstract: The construction industry is on the brink of a revolutionary transformation with the advent of new technologies designed to address the pressing demands of sustainability, efficiency, and affordability. Among these innovations, 3D printing using earth materials stands out as a particularly intriguing development. This technique, which leverages locally sourced soil, proposes a paradigm shift from traditional construction methods. However, as with any emerging technology, it prompts a critical question: is 3D printing for earth construction a tangible solution to be adopted, or is it merely a futuristic vision that remains out of reach? This discussion explores the current state of 3D printing with earth materials, examining its practical applications, technological advancements, and the challenges that must be overcome to determine whether it is a present-day reality or an elusive mirage. This study specifically sought to identify the key mixture variables that impact the properties of a local and Portuguese stabilised earth, potentially suitable for 3D printing, and to determine the appropriate ranges for further investigation. To achieve this, a 23 central composite design (CCD) approach was employed to develop statistical models capable of describing fresh properties such as slump and other engineering characteristics like mechanical performance, resistivity, and mass loss. As such, a central composite design (CCD) was followed to find statistical models capable of describing those key stabilised earth mixtures properties in function of mixture input parameters: water to solids volume ratio (Vw/Vp); superplasticiser to cement weight ratio (Sp/p); cement to soil weight ratio (c/s). (c) 2025 Elsevier B.V., All rights reserved.

Competições EBEC-Porto 24h: uma abordagem pedagógica ativa para o desenvolvimento de competências transversais em estudantes STEM da Universidade do Porto - dez anos de experiência

2026-05-27T06:47:37Z

Title: Competições EBEC-Porto 24h: uma abordagem pedagógica ativa para o desenvolvimento de competências transversais em estudantes STEM da Universidade do Porto - dez anos de experiência

Spotlighting distraction in artificial intelligence driver assistance systems

2026-05-07T06:22:35Z

Title: Spotlighting distraction in artificial intelligence driver assistance systems Abstract: As artificial intelligence driver monitoring systems gain momentum in intelligent mobility, it is critical to analyse how distraction is defined and induced. This systematic review was specifically focused on studies conducted in driving simulators. A Boolean query was iteratively developed to retrieve articles from Scopus that fulfil the following criteria: (1) being an empirical study, (2) addressing driver distraction, (3) using a driving simulator, (4) aiming at developing an artificial intelligence monitoring system. After screening, 34 articles remained and were analysed according to four general themes: definition of distraction, characteristics of the scenarios used in the driving simulator, sampling of participants, and procedures. Results showed that the most common definitions of distraction consider it as a shift in the driver's attention towards a secondary task, which implicates in a degradation of the execution of the primary task (i.e., driving the vehicle), and, consequently, a reduction in driving safety. Most articles described the scenarios used in the simulator in greater detail and, in some cases, variations in traffic density, visibility, and environmental conditions were observed. Furthermore, scripted critical events in the scenario (e.g., car in front of the participant breaking) were also used. Recruitment and samples varied greatly between studies, with the smallest population consisting of two and the largest of 97 participants. Despite the sample size, participants still needed to meet eligibility criteria such as having a driver's license, possessing minimum driving experience, health prerequisites, being part of a specific group, age, and gender. Procedures and tasks were not always described in detail. However, several studies described an initial moment where participants could familiarize themselves with the simulator without taking measurements, while fewer reported that participants were allowed to familiarize themselves with the tasks. Session length varied from eight to 90 minutes. Regarding the operationalization of distraction in experiments, some studies required drivers to perform a single type of distraction-inducing task (mental calculations, use of In-Vehicle Information System (IVIS), cell phone operation, and manual tasks) with varying difficulty levels. Still, most studies relied on a combination of different tasks, such as cell phone use, physical tasks (e.g., drinking, moving objects, and applying makeup), and IVIS use. Results showed studies favour the description of the digital systems over the experiment design and procedures and a preference for locating the studies at the individual level of analysis, precluding a broader understanding of human behaviour as socially constructed and signified. We argue that articulation with higher levels of analysis would bring relevant explanations for actual road behaviour and personal and social factors should be considered when developing driver monitoring systems aimed at reducing distraction. Our results may assist future studies within the same scope, guiding the definition of effective experimental designs to test artificial intelligence driving monitoring systems, while contributing to a more holistic understanding of driver's behaviour. (c) 2023. Published by AHFE Open Access. All rights reserved.

Communication Needs and the Driver's Activity in Platooning Systems

2026-05-06T06:22:15Z

Title: Communication Needs and the Driver's Activity in Platooning Systems

Antimicrobial Resistance and Biofilm Persistence

2026-04-23T06:37:50Z

Title: Antimicrobial Resistance and Biofilm Persistence

Biofilms and Chronic Infections in DFUs

2026-04-23T06:24:31Z

Title: Biofilms and Chronic Infections in DFUs

Microalgae harvesting techniques

2026-04-17T06:36:07Z

Title: Microalgae harvesting techniques Abstract: Microalgae have attracted the attention of several researchers, due to the undeniable potential of these microorganisms in several applications. Microalgae can be used in environmental applications, such as CO2 capture from the atmosphere or flue gas emissions, and in the removal of nutrients and pollutants from different wastewaters. They can also be used in the energetic sector, as a renewable energy source. Due to their very rich composition in terms of proteins, vitamins, lipids, polyunsaturated fatty acids, and other valuable compounds, microalgae can be used as raw material for several industries, such as food and feed, pharmaceuticals, and cosmetics.

Use of Construction and Demolition Waste and Steel Slag

2026-04-15T06:38:03Z

Title: Use of Construction and Demolition Waste and Steel Slag

Património e paisagem: gestão, análise, projeto

2026-04-14T06:46:52Z

Title: Património e paisagem: gestão, análise, projeto Abstract: Heritage and landscape are inseparable and central themes in contemporary society as a support for identity and a factor in sustainable socio-cultural and territorial development. This training unit is therefore intended to enrich and diversify the University of Porto (UP) training framework, boosting areas of interdisciplinary work between Architecture, History of Art, Landscape Architecture and Civil Engineering, which are fundamental to understanding the concept of heritage in its contemporary and broader sense - built and natural, material and immaterial. The aim is also to strengthen cooperation networks between different organic units at UP, using new tools, technologies and teaching, geared towards advanced training, but also fostering interactions with the civil community, institutions and cultural agents. The training unit proposes a critical approach to the concepts of heritage and cultural landscape, including their historical and theoretical foundations, methodological and design tools, as well as safeguarding and management instruments. In this way, the aim is to deepen knowledge of the history and theories of heritage intervention in a broad sense, with the aim of instructing and grounding contemporary practice of intervention in the built and the landscape, integrating an understanding of its multiple stratigraphies. Creditable as a University of Porto option curricular unit (MIARQ or 2nd cycle), singular curricular unit (diploma supplement) or continuous training unit / free course (3 ECTS). Description: Património e paisagem são temáticas indissociáveis e centrais na sociedade contemporânea como suporte identitário e fator de um desenvolvimento sociocultural e territorial sustentável. Deste modo, com esta unidade de formação, propõe-se enriquecer e diversificar o quadro formativo da Universidade do Porto, potenciando áreas de trabalho interdisciplinar - entre Arquitetura, História de Arte, Arquitetura Paisagista e Engenharia Civil - fundamentais para uma compreensão do conceito de património na sua aceção contemporânea e alargada - construído e natural, material e imaterial. Deste modo, pretende-se também reforçar redes de cooperação entre diferentes unidades orgânicas da Universidade do Porto, com recurso à exploração de novas ferramentas, tecnologias e práticas pedagógicas, orientadas para a formação avançada, mas também potenciando interações com a comunidade civil, instituições e agentes culturais. A unidade de formação propõe uma abordagem crítica aos conceitos de património e de paisagem cultural, incluindo os seus fundamentos históricos e teóricos, as ferramentas metodológicas e de projeto, bem como os instrumentos de salvaguarda e gestão. Deste modo, pretende-se aprofundar o conhecimento no âmbito da intervenção no património e na paisagem em sentido lato, com a finalidade de instruir e fundamentar uma prática contemporânea de intervenção no construído e na paisagem, integrando o entendimento das suas múltiplas estratigrafias. Esta unidade de formação é creditável como unidade de formação de opção da Universidade do Porto (MIARQ ou 2.º ciclo), unidade de formação singular (suplemento ao diploma) ou unidade de formação contínua / curso livre (3 ECTS).

On the Connections between Mathematical Prog./Discrete Optimal Control

2026-04-14T06:46:51Z

Title: On the Connections between Mathematical Prog./Discrete Optimal Control

New technologies for earth construction: 3D printing, a reality or a mirage?

2026-04-12T06:53:03Z

Title: New technologies for earth construction: 3D printing, a reality or a mirage?

Healthcare Professionals' Occupational Exposure to Nanoparticles: A Short Review

2026-04-10T06:46:40Z

Title: Healthcare Professionals' Occupational Exposure to Nanoparticles: A Short Review

Job Crafting in the Health Context-Possibilities and Limits: A Systematic Review

2026-04-10T06:46:06Z

Title: Job Crafting in the Health Context-Possibilities and Limits: A Systematic Review

Job Crafting Assessment: A Systematic Review

2026-04-10T06:45:25Z

Title: Job Crafting Assessment: A Systematic Review

Bridging the Gap: Understanding Miner's Needs to Improve Risk Assessment Education

2026-04-03T06:37:24Z

Title: Bridging the Gap: Understanding Miner's Needs to Improve Risk Assessment Education

Proposal for a Data-Driven Model for Occupational Safety

2026-04-03T06:37:09Z

Title: Proposal for a Data-Driven Model for Occupational Safety