Universidade Técnica do Porto

The Relationship between Tool Coatings and Process Parameters on Cutting Forces and Wear in High-Speed Machining

This paper provides a comprehensive analysis of cutting force dynamics in High-Speed Machining (HSM), a critical factor for ensuring structural integrity and productivity in advanced manufacturing. The study synthesizes the role of piezoelectric dynamometry and the Finite Element...

Lean tools and Industry 4.0 technologies: a multidimensional analysis of firm performance

Purpose This study aims to examine how Lean/Lean Six Sigma (LSS) tools and Industry 4.0 (I4.0) technologies relate to firm performance across multiple dimensions and time horizons. Prior research has focused predominantly on productivity; the authors extend this view to profitabi...

An Integrated Preventive Maintenance Transformation Framework Combining Lean Practices, Autonomous Maintenance and Digital Traceability

Despite the widespread adoption of Lean and Total Productive Maintenance (TPM) methodologies, many manufacturing companies still struggle to operationally integrate preventive maintenance, workplace organization, autonomous maintenance, and digital traceability into a coherent an...

Enhancing an Automatic Automotive Cable Assembly Line: A Design Science Research Approach to Improve OEE

The automotive industry demands high standards of efficiency and reliability in order to remain competitive. This study addresses the optimization of an automatic production cell (“Line X”) dedicated to the manufacture of cables for automotive latches, which initially presented c...

Microplastic-mediated transfer of parabens and its ecotoxicological impact on Chlorella vulgaris

Microplastics (MPs) are pervasive contaminants in aquatic systems and wastewater (WW), with polystyrene microplastics (PS-MPs) posing remarkable ecotoxicological risks and acting as potential carriers for other emerging contaminants (ECs), such as parabens - widely used preservat...

Viability Analysis of Reusing Polymers in Additive Manufacturing

Additive manufacturing (AM) has grown into a widely accessible technology. This shift has been driven largely by advances in low-cost, user-friendly equipment, particularly in fused deposition modelling (FDM) systems. However, material use remains a major cost and sustainability...

A scoping review of positive youth development coach education programmes: implications for future research

Many positive youth development-focused coach education programmes (PYD-focused CEPs) have been designed to help coaches learn the processes and mechanisms associated with fostering life skills and values, amongst other PYD outcomes. Previous reviews of PYD through sport have foc...

Global and Local Approaches Applied to Mode I Fracture Toughness Measurement of Bi-Material Bonded Joints

Nowadays, the application of different materials is quite common to optimise the performance of structural components. In this context, bonding between metals and composites becomes a frequent strategy. However, the appropriate design requires special care owing to the complex st...

Explainable machine learning for neurocognitive severity clustering and multivariable profiling after acute coronary syndrome

Neurocognitive impairment is a frequent complication of Acute Coronary Syndrome (ACS). Current research often treats cognitive decline as a monolithic outcome, failing to account for the heterogeneous ways in which psychosocial and clinical factors interact to form distinct patie...

Innovating from within: How does intrapreneurship influence the performance of public institution employees?

Purpose This study aims to analyze how intrapreneurship influences commitment to work, employee satisfaction, innovative behaviour and employee performance in public organizations. Design/methodology/approach To develop this study, a structured questionnaire was applied to a samp...

Quality of life and social relationships in people with aphasia: a cross-sectional study

Background Aphasia is a chronic acquired communication disorder that may change the lives of those who live with it. Although its impact on Quality of Life (QOL) is acknowledged, people with aphasia (PWA) remain underrepresented in QOL research. Furthermore, since QOL correlates...

Negative Life Events and Entrepreneurial Propensity: The Mediating Role of Resilience and Locus of Control

This study aims to assess how negative life events, social norms, and need for achievement influence entrepreneurial propensity, and to examine whether resilience and locus of control mediate these relationships. To carry out this study, a quantitative methodology was used throug...

Event-related potentials reveal enhanced processing of social media over monetary rewards

Since the first online social media platform, using social media has emerged as one of the defining behaviors of the new millennium. For most users such behavior is recreational. However, for some individuals, the use of social media may develop to problematic, compromising their...

Influencers' characteristics and communication strategies in purchase intention at festivals

Purpose Brands use influencer marketing as a key method to connect with event attendees during festivals. The ability of influencers to form stronger bonds with their audience can increase consumers' purchase intention. This study investigates how influencer characteristics and c...

A lean-based method for patient journey improvement: enhancing value and performance in healthcare delivery

Purpose This research introduces a lean-based method, from the customer’s perspective, aimed at continuously improving the sequence of value and non-value stages throughout the purchase journey, named the ideal customer journey method (ICJM). Design/methodology/approach The ICJM...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...