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Publicações

2025

Dynamic dispatching rule selection for the job shop scheduling problem

Autores
Marques, N; Figueira, G; Guimaraes, L;

Publicação
COMPUTERS & INDUSTRIAL ENGINEERING

Abstract
Uncertainty is pervasive in modern manufacturing settings. In order to cope with unexpected events, scheduling decisions are commonly taken resorting to dispatching rules, which are reactive in nature. However, rule performance varies according to shop utilisation and due date allowance, which often change in dynamic real-world job shops. Therefore, this paper explores systems that select dispatching rules as conditions change over time, namely periodic and real-time dispatching rule selection systems, which are based on supervised learning and reinforcement learning algorithms, respectively. These types of systems have been proposed in the past but have been further improved in this work by carefully selecting the most relevant state features and dispatching rules. Moreover, by testing both approaches on the same instances, it was possible to compare them and determine the most advantageous one. After the tests, which included a wide array of job shop instances, both periodic and real-time systems outperformed state-of-the-art dispatching rules by over 10% tardiness-wise. Nonetheless, the periodic rule selection approach was more robust across all tests than the real-time approach. These results demonstrate that there is a real incentive for managers to adopt dispatching rule selection systems.

2025

FOMO as a Trigger to Embrace the Digital Nomad Lifestyle

Autores
de Almeida, MA; de Souza Nascimento, MG; Correia, A; Barbosa, CE; de Souza, JM; Schneider, D;

Publicação
2025 28th International Conference on Computer Supported Cooperative Work in Design (CSCWD)

Abstract

2025

Knowledge sharing and team dynamics in the context of an incubation program

Autores
Kurteshi, R; Almeida, F;

Publicação
Knowledge Sharing and Fostering Collaborative Business Culture

Abstract
Knowledge sharing and team dynamics are essential elements of entrepreneurial success, especially in teams that operate in innovative environments. This chapter explores how participation in an incubation program influences the formation and development of entrepreneurial team identity. It aims to understand the dynamics involved in creating entrepreneurial teams, the practices of knowledge sharing, and the role digital technologies play in supporting and sustaining these processes. The study focuses on teams that completed the CEU iLab Incubation Program, with data gathered through in-depth semistructured interviews from twenty-five entrepreneurs across various startups. Five cases, involving entire entrepreneurial teams, were central to this research. The findings offer valuable insights for enhancing incubation programs, promoting entrepreneurial identity formation, and improving the success of new ventures. These insights are beneficial for both scholars and practitioners in the entrepreneurship field. © 2025 by IGI Global Scientific Publishing. All rights reserved.

2025

KDBI special issue: Time-series pattern verification in CNC turning-A comparative study of one-class and binary classification

Autores
da Silva, JP; Nogueira, AR; Pinto, J; Curral, M; Alves, AC; Sousa, R;

Publicação
EXPERT SYSTEMS

Abstract
Integrating Industry 4.0 and Quality 4.0 optimises manufacturing through IoT and ML, improving processes and product quality. The primary challenge involves identifying patterns in computer numerical control (CNC) machining time-series data to boost manufacturing quality control. The proposed solution involves an experimental study comparing one-class and binary classification algorithms. This study aims to classify time-series data from CNC turning machines, offering insight into monitoring and adjusting tool wear to maintain product quality. The methodology entails extracting spectral features from time-series data to train both one-class and binary classification algorithms, assessing their effectiveness and computational efficiency. Although certain models consistently outperform others, determining the best performing is not possible, as a trade-off between classification and computational performance is observed, with gradient boosting standing out for effectively balancing both aspects. Thus, the choice between one-class and binary classification ultimately relies on dataset's features and task objectives.

2025

Is a Good Story Enough? A Critical Analysis of Storyteller Roles in Tourism

Autores
Moreira, AC; da Costa, RA; de Sousa, MJN;

Publicação
JOURNAL OF HOSPITALITY & TOURISM RESEARCH

Abstract
As storytelling influences consumer attitudes and opinions, conditioning the tourist experience by appealing to the imagination, this paper reviews the literature covering the analysis of 66 papers that focus on the storytelling of the visitor/tourist as the main subject. The article is divided into four main themes: (a) storytelling as a tool to attract tourists; (b) the role of the storyteller; (c) the tourist as a storyteller; and (d) what makes a good story. The Hoshin Kanri Matrix was used to showcase each of the main themes. Although storytelling has been widely used to attract tourists, it is crucial that tourist-based storytelling can be a credible substitute for destination-based storytelling, as empathy, authenticity and the emotional attachment of tourists as storytellers play an important role as good stories, transforming and co-creating their experiences that emerge from the interaction of tourists, residents, and intermediaries.

2025

Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications, VISIGRAPP 2025 - Volume 3: VISAPP, Porto, Portugal, February 26-28, 2025

Autores
Rogers, TB; Meneveaux, D; Ammi, M; Ziat, M; Jänicke, S; Purchase, HC; Radeva, P; Furnari, A; Bouatouch, K; de Sousa, AA;

Publicação
VISIGRAPP (3): VISAPP

Abstract

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