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How to determine hands’ vibration perception thresholds – a systematic review

Silva, Emanuel Teixeira; Lisboa, Maria Isabel Almeida Costa Pinto; Costa, Nélson Bruno Martins Marques da

The vibration perception threshold (VPT) is the minimum amplitude required for conscious vibration perception. VPT assessments are essential in medical diagnostics, safety, and human–machine interaction technologies. However, factors like age, health conditions, and external variables affect VPTs. Various methodologies and distinct procedures have been used to access VPTs, leading to challenges in establishing ...


Capturing mental workload through physiological sensors in human-robot collabor...

Pereira, Eduarda Manuel Barros; Guachamin, Luis Francisco Sigcha; Silva, Emanuel Teixeira; Sampaio, Adriana; Costa, Nuno Miguel Cerqueira

Human–robot collaboration (HRC) is increasingly prevalent across various industries, promising to boost productivity, efficiency, and safety. As robotics technology advances and takes on more complex tasks traditionally performed by humans, the nature of work and the demands on workers are evolving. This shift emphasizes the need to critically integrate human factors into these interactions, as the effectivenes...


Artificial neural network-based model for assessing the whole-body vibration of...

Aguilar, Antonio J.; de la Hoz-Torres, María L.; Martínez-Aires, Mᵃ Dolores; Ruiz, Diego P.; Arezes, P.; Costa, Nélson Bruno Martins Marques da

Musculoskeletal disorders, which are epidemiologically related to exposure to whole-body vibration (WBV), are frequently self-reported by workers in the construction sector. Several activities during building construction and demolition expose workers to this physical agent. Directive 2002/44/CE defined a method of assessing WBV exposure that was limited to an eight-hour working day, and did not consider the cu...


Hand vibration threshold mapper (HaViThreMa): A haptic vibration system

Silva, Emanuel Teixeira; Lisboa, Isabel C.; Matias, Tiago; Gomes, Rui; Carvalho, Adriano Dídimo Machado; Cardoso, Paulo

This paper describes the design aspects of a system created to assess vibration perception thresholds (VPT). i.e., the minimum thresholds of mechanical vibration that humans can perceive on their hands. The system can carry out these assessments on various areas of the hand, such as the fingertips and the palm, and assessments are conducted according to pre-established psychophysical protocols. The technical sp...


International Symposium on Occupational Safety and Hygiene: Proceedings Book of...

Arezes, P.; Baptista, J. S.; Melo, Rui; Barroso, M. P.; Branco, Jacqueline Castelo; Carneiro, P.; Colim, A.; Costa, Nélson Bruno Martins Marques da


International symposium on occupational safety and hygiene: Abstracts book of t...

Arezes, P.; Baptista, J. S.; Melo, R.; Barroso, M.; Branco, J. C.; Carneiro, P.; Colim, A.; Costa, Nélson Bruno Martins Marques da; Costa, S.


Assessing the short-term effects of dual back-support exoskeleton within logist...

Cardoso, André; Colim, Ana S.; Carneiro, P.; Costa, Nélson Bruno Martins Marques da; Gomes, Sérgio; Pires, Abel; Arezes, P.

Logistics activities involve significant risk factors for the development of work-related musculoskeletal disorders (WMSD), particularly low back pain. Exoskeletons have emerged as potential solutions to mitigate these risks. This study assesses the short-term effects of dual passive back-support exoskeletons (Auxivo and Htrius) on WMSD risk factors in logistics operations. Two workstations were evaluated using...


Hand’s vibration perception thresholds: a systematic review

Silva, Emanuel Teixeira; Lisboa, Maria Isabel Almeida Costa Pinto; Costa, Nélson Bruno Martins Marques da

The term vibration perception threshold (VPT) refers to the minimum amplitude required for a vibration to be consciously perceived. Knowledge of VPTs can be used to aid in the diagnosis of various pathologies, or to support design decisions during human-machine interface development. However, several factors affect VPT measurements (e.g., contactor size and pressure), thus, comparing VPT results from multiple s...


Monipar: movement data collection tool to monitor motor symptoms in Parkinson’s...

Sigcha, Luis; Polvorinos-Fernández, Carlos; Costa, Nélson Bruno Martins Marques da; Costa, Susana Raquel Pinto; Arezes, P.; Gago, Miguel; Lee, Chaiwoo

Introduction: Parkinson’s disease (PD) is a neurodegenerative disorder commonly characterized by motor impairments. The development of mobile health (m-health) technologies, such as wearable and smart devices, presents an opportunity for the implementation of clinical tools that can support tasks such as early diagnosis and objective quantification of symptoms. Objective: This study evaluates a framework to mon...


What times should be used for fNIRS and EEG protocol?

Ribeiro, Iara Margolis; Silva, Rute Alexandra Domingues; Fernandez, Diego Pinal; Costa, Nélson Bruno Martins Marques da; Providencia, B

fNIRS (Functional near-infrared spectroscopy) and EEG (Electroencephalogram) are two technologies that measure brain activity. Recently expanded to new fields, such as Design. These technologies are beginning to be applied simultaneously in the laboratory or in real life, as they allow researchers to collect distinct data - electrical activity in the form of brain waves and the concentration of oxygenated and d...


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