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Publications

Publications by SYSTEM

2024

Sample Size Analysis for a Production Line Study of Time

Authors
da Silva, MI; Vaz, CB;

Publication
FLEXIBLE AUTOMATION AND INTELLIGENT MANUFACTURING: ESTABLISHING BRIDGES FOR MORE SUSTAINABLE MANUFACTURING SYSTEMS, FAIM 2023, VOL 2

Abstract
Setting labor standards is an important topic to operational and strategic planning which requires the time studies establishment. This paper applies the statistical method for the definition of a sample size in order to define a reliable cycle time for a real industrial process. For the case study it is considered a welding process performed by a single operator that does the load and unload of components in 4 different welding machines. In order to perform the time studies, it is necessary to collect continuously data in the production line by measuring the time taken for the operator to perform the task. In order to facilitate the measurements, the task is divided into small elements with visible start and end points, called Measurement Points, in which the measurement process is applied. Afterwards, the statistical method enables to determine the sample size of observations to calculate the reliable cycle time. For the welding process presented, it is stated that the sample size defined through the statistical method is 20. Thus, these time observations of the task are continuously collected in order to obtain a reliable cycle time for this welding process. This time study can be implemented in similar way in other industrial processes.

2024

Transitioning trends into action: A simulation-based Digital Twin architecture for enhanced strategic and operational decision-making

Authors
Santos, R; Piqueiro, H; Dias, R; Rocha, CD;

Publication
COMPUTERS & INDUSTRIAL ENGINEERING

Abstract
In the dynamic realm of nowadays manufacturing, integrating digital technologies has become paramount for enhancing operational efficiency and decision-making processes. This article presents a novel system architecture that integrates a Simulation-based Digital Twin (DT) with emerging trends in manufacturing to enhance decision-making, accompanied by a detailed technical approach encompassing protocols and technologies for each component. The DT leverages advanced simulation techniques to model, monitor, and optimize production processes in real time, facilitating both strategic and operational decision-making. Complementing the DT, trending technologies such as artificial intelligence, additive manufacturing, collaborative robots, autonomous vehicles, and connectivity advancements are strategically integrated to enhance operational efficiency and facilitate the adoption of the Manufacturing as a Service (MaaS) paradigm. A case study within a MaaS supplier context, deployed in an industrial laboratory with advanced robotic systems, demonstrates the practical application of optimizing dynamic job-shop configurations using Simulation-based DT, showcasing strategies to improve operational efficiency and resource utilization. The results of the industrial experiment were highly encouraging, underscoring the potential for extension to more intricate industrial systems, with particular emphasis on incorporating sustainability and remanufacturing principles.

2024

Enhancing Smart Manufacturing Systems: A Digital Twin Approach Employing Simulation, Flexible Robots and Additive Manufacturing Technologies

Authors
Santos, R; Rocha, C; Dias, R; Quintas, J;

Publication
SIMULATION FOR A SUSTAINABLE FUTURE, PT 1, EUROSIM 2023

Abstract
A new generation of manufacturing systems is emerging through the adoption of new policies to overcome future crises highlighted by constant social, environmental, and economic concerns. The rise of so-called smart manufacturing is noticeable. However, new risks to humankind are being introduced, and, more than ever, science and technology are required to guarantee the future sustainability and resilience of our manufacturing systems. This research presents a Digital Twin approach resorting to simulation models with embedded intelligence to transform efficient manufacturing systems and react to complex and unpredictable circumstances. The methodology covers production scheduling incorporating flexible robots, internal logistics supervision contemplating planning and control of mobile robots, and capacity management. The method demonstrates the potential of integrating Additive Manufacturing technologies to quickly react to production needs. The developed strategy was enforced and assessed in an industrial experiment, exhibiting its robustness and promising application. The attained results were very encouraging, highlighting its potential extension to more complex industrial systems.

2024

Technological Resources for Physical Rehabilitation in Cancer Patients Undergoing Chemotherapy: A Scoping Review

Authors
Amarelo, A; Mota, M; Amarelo, B; Ferreira, MC; Fernandes, CS;

Publication
CANCERS

Abstract
Background/Objectives: Cancer patients undergoing chemotherapy often face challenges that reduce their physical function and quality of life. Technological resources offer innovative solutions for physical rehabilitation, but the extent of their application in this context remains unclear. This scoping review aims to explore and map the various technological tools used to support physical rehabilitation in cancer patients during chemotherapy, focusing on their potential to improve outcomes and enhance patient care. Methods: A scoping review was conducted following the Joanna Briggs Institute (JBI) guidelines and the PRISMA-ScR framework. Comprehensive searches were performed in the MEDLINE, CINAHL, Scopus, SPORTDiscus, and COCHRANE databases. The included studies focused on the technological resources used in physical rehabilitation for cancer patients undergoing chemotherapy. Data extraction followed the World Health Organization's Classification of Digital Health Interventions v1.0 to categorize the technologies. Results: A total of 32 studies met the inclusion criteria. The most commonly used technologies included wearable devices (16 studies), web-based platforms and telerehabilitation systems (7 studies), mHealth applications (6 studies), virtual reality (2 studies), and exergaming (3 studies). These tools were designed to enhance physical function, manage treatment-related symptoms, and improve overall quality of life. Wearable devices were particularly effective for monitoring physical activity, while web-based platforms and mHealth applications supported remote rehabilitation and patient engagement. Conclusions: Technological resources offer significant opportunities for personalized rehabilitation interventions in cancer patients undergoing chemotherapy. However, further research is needed to evaluate the long-term effectiveness, cost-efficiency, and clinical integration of these tools to ensure broader accessibility and sustainable impact.

2024

Understanding Customer Experience with Healthcare Mobile Applications

Authors
Silva, DM; Ferreira, MC; Tavares, JMRS;

Publication
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON UBIQUITOUS COMPUTING AND AMBIENT INTELLIGENCE, UCAMI 2024

Abstract
This study addresses the critical need to enhance patient's experience with healthcare mobile applications. With the exponential growth of healthcare apps over the past decade, it is imperative to understand the patients' perceptions of what is lacking and how healthcare mobile applications can be improved in terms of design, features, and communication between patients and providers, such as doctors or hospitals. This research was conducted in four phases: gathering insights into User-Interface (UI) and User-Experience, constructing a patient-focused survey, experimenting with various UI designs, and statistically analyzing survey responses about hospital mobile applications. Key findings from 82 responses highlighted the necessity to redesign both hospital app transaction processes and the apps themselves in terms of functionality and UI. Technological innovations like chatbots were underutilized due to the lack of affective computing in developing these features and a reported lack of user awareness. Regarding UI preferences, respondents favored larger text, less bold text, and blue as the primary color. Future developments should include direct communication with doctors and self-check-in features. Addressing these areas can significantly enhance patient satisfaction and engagement with healthcare mobile applications, particularly hospital apps.

2024

Innovating in Nursing Education: A Game Prototype for Bridging the Gap in Family-Centered Care

Authors
de Oliveira, JF; Campos, J; Martins, T; Fernandes, CS; Ferreira, MC;

Publication
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON UBIQUITOUS COMPUTING AND AMBIENT INTELLIGENCE, UCAMI 2024

Abstract
In recent years, there has been an increasing trend towards innovative and interactive learning approaches. Serious games have emerged as a promising solution in health education, offering engaging and immersive learning experiences. This article presents the development steps of a mobile application to promote knowledge of nursing assessment and intervention in the family. A prototype was developed for Android devices using React Native technology and Firebase database, incorporating gamification elements. It was then evaluated by potential users. The results showed that the proposed solution successfully enhanced nurses' learning about family issues and dynamics, receiving positive feedback from users regarding its effectiveness and usability. By leveraging the power of mobile technology and gamification, this researchwork seeks to bridge an existing gap, contributing to the advancement of game-based educational approaches in the health field.

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