HASLab

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This service produces reliable software systems in contexts where correctness, responsiveness, robustness and security are essential. It develops integrated research in three lines: formal methods for software development, reliable distributed systems and information security.

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Browsing HASLab by Author "5599"
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    Addressing Interactive Computing Systems' Concerns in Software Engineering Degrees
    ( 2022) José Creissac Campos ; António Nestor Ribeiro ; 5599 ; 5639
    This paper arises from experience by the authors in teaching software engineering courses. It discusses the need for adequate coverage of Human-Computer Interaction topics in these courses and the challenges faced when addressing them. Three courses, at both licentiate and master's levels, are used as triggers for the discussion. The paper argues that the lack of relevant Human-Computer Interaction concepts creates challenges when teaching and learning requirements analysis, design, and implementation of software systems. The approaches adopted to address these challenges are described.
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    Addressing Interactive Computing Systems' Concerns in Software Engineering Degrees
    ( 2021) José Creissac Campos ; António Nestor Ribeiro ; 5599 ; 5639
    This paper arises from experience by the authors in teaching software engineering courses. It discusses the need for adequate coverage of Human-Computer Interaction topics in these courses and the challenges faced when addressing them. Three courses, at both licentiate and master’s levels, are used as triggers for the discussion. The paper argues that the lack of relevant Human-Computer Interaction concepts creates challenges when teaching and learning requirements analysis, design, and implementation of software systems. The approaches adopted to address these challenges are described. © 2022, IFIP International Federation for Information Processing.
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    Addressing Interactive Computing Systems' Concerns in Software Engineering Degrees
    ( 2021) José Creissac Campos ; António Nestor Ribeiro ; 5599 ; 5639
    This paper arises from experience by the authors in teaching software engineering courses. It discusses the need for adequate coverage of Human-Computer Interaction topics in these courses and the challenges faced when addressing them. Three courses, at both licentiate and master’s levels, are used as triggers for the discussion. The paper argues that the lack of relevant Human-Computer Interaction concepts creates challenges when teaching and learning requirements analysis, design, and implementation of software systems. The approaches adopted to address these challenges are described. © 2022, IFIP International Federation for Information Processing.
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    AMAN Case Study
    ( 2023) José Creissac Campos ; 5599
    This document presents the case study for the ABZ 2023 conference. The case study introduces a safety critical interactive system called AMAN (Arrival MANager), which is a partly-autonomous scheduler of landing sequences of aircraft in airports. This interactive systems interleaves Air Traffic Controllers activities with automation in AMAN. While some AMAN systems are currently deployed in airports, we consider here only a subset of functions which represent a challenge in modelling and verification. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
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    AMAN Case Study
    ( 2023) José Creissac Campos ; 5599
    This document presents the case study for the ABZ 2023 conference. The case study introduces a safety critical interactive system called AMAN (Arrival MANager), which is a partly-autonomous scheduler of landing sequences of aircraft in airports. This interactive systems interleaves Air Traffic Controllers activities with automation in AMAN. While some AMAN systems are currently deployed in airports, we consider here only a subset of functions which represent a challenge in modelling and verification. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
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    AMAN Case Study
    ( 2023) José Creissac Campos ; 5599
    This document presents the case study for the ABZ 2023 conference. The case study introduces a safety critical interactive system called AMAN (Arrival MANager), which is a partly-autonomous scheduler of landing sequences of aircraft in airports. This interactive systems interleaves Air Traffic Controllers activities with automation in AMAN. While some AMAN systems are currently deployed in airports, we consider here only a subset of functions which represent a challenge in modelling and verification. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
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    Balancing the formal and the informal in user-centred design
    ( 2021) José Creissac Campos ; Harrison,MD ; Masci,P ; 5599
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    Balancing the Formal and the Informal in User-centred Design
    ( 2021) Michael Douglas Harrison ; José Creissac Campos ; 6421 ; 5599
    This paper explores the role of formal methods as part of the user-centred design of interactive systems. An iterative process is described, developing prototypes incrementally, proving user-centred requirements while at the same time evaluating the prototypes that are executable forms of the developed models using 'traditional' techniques for user evaluation. A formal analysis complements user evaluations. This approach enriches user-centred design that typically focuses understanding on context and producing sketch designs. These sketches are often non-functional (e.g. paper) prototypes. They provide a means of exploring candidate design possibilities using techniques such as cooperative evaluation. This paper describes a further step in the process using formal analysis techniques. The use of formal methods provides a systematic approach to checking plausibility and consistency during early design stages, while at the same time enabling the generation of executable prototypes. The technique is illustrated through an example based on a pill dispenser.
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    Development and Validation of a Descriptive Cognitive Model for Predicting Usability Issues in a Low-Code Development Platform
    ( 2021) José Creissac Campos ; António Nestor Ribeiro ; 5599 ; 5639
    Objective The aim of the study was the development and evaluation of a Descriptive Cognitive Model (DCM) for the identification of three types of usability issues in a low-code development platform (LCDP). Background LCDPs raise the level of abstraction of software development by freeing end-users from implementation details. An effective LCDP requires an understanding of how its users conceptualize programming. It is necessary to identify the gap between the LCDP end-users' conceptualization of programming and the actions required by the platform. It is also relevant to evaluate how the conceptualization of the programming tasks varies according to the end-users' skills. Method DCMs are widely used in the description and analysis of the interaction between users and systems. We propose a DCM which we called PRECOG that combines task decomposition methods with knowledge-based descriptions and criticality analysis. This DCM was validated using empirical techniques to provide the best insight regarding the users' interaction performance. Twenty programmers (10 experts, 10 novices) were observed using an LCDP and their interactions were analyzed according to our DCM. Results The DCM correctly identified several problems felt by first-time platform users. The patterns of issues observed were qualitatively different between groups. Experts mainly faced interaction-related problems, while novices faced problems attributable to a lack of programming skills. Conclusion By applying the proposed DCM we were able to predict three types of interaction problems felt by first-time users of the LCDP. Application The method is applicable when it is relevant to identify possible interaction problems, resulting from the users' background knowledge being insufficient to guarantee a successful completion of the task at hand.
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    Development and Validation of a Descriptive Cognitive Model for Predicting Usability Issues in a Low-Code Development Platform
    ( 2021) Silva,C ; Vieira,J ; José Creissac Campos ; Rui Miguel Couto ; António Nestor Ribeiro ; 5639 ; 5599 ; 6000
    Objective The aim of the study was the development and evaluation of a Descriptive Cognitive Model (DCM) for the identification of three types of usability issues in a low-code development platform (LCDP). Background LCDPs raise the level of abstraction of software development by freeing end-users from implementation details. An effective LCDP requires an understanding of how its users conceptualize programming. It is necessary to identify the gap between the LCDP end-users' conceptualization of programming and the actions required by the platform. It is also relevant to evaluate how the conceptualization of the programming tasks varies according to the end-users' skills. Method DCMs are widely used in the description and analysis of the interaction between users and systems. We propose a DCM which we called PRECOG that combines task decomposition methods with knowledge-based descriptions and criticality analysis. This DCM was validated using empirical techniques to provide the best insight regarding the users' interaction performance. Twenty programmers (10 experts, 10 novices) were observed using an LCDP and their interactions were analyzed according to our DCM. Results The DCM correctly identified several problems felt by first-time platform users. The patterns of issues observed were qualitatively different between groups. Experts mainly faced interaction-related problems, while novices faced problems attributable to a lack of programming skills. Conclusion By applying the proposed DCM we were able to predict three types of interaction problems felt by first-time users of the LCDP. Application The method is applicable when it is relevant to identify possible interaction problems, resulting from the users' background knowledge being insufficient to guarantee a successful completion of the task at hand.
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    Distance Perception in Immersive Environments - The Role of Photorealism
    ( 2015) Silva,C ; José Creissac Campos ; Santos,J ; Basso,D ; Mouta,S ; 5599
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    Don't go in there! using the APEX framework in the design of ambient assisted living systems
    ( 2017) Abade,T ; Harrison,MD ; Silva,JL ; José Creissac Campos ; 5599
    An approach to design Ambient Assisted Living systems is presented, which is based on APEX, a framework for prototyping ubiquitous environments. The approach is illustrated through the design of a smart environment within a care home for older people. Prototypes allow participants in the design process to experience the proposed design and enable developers to explore design alternatives rapidly. APEX provides the means to explore alternative environment designs virtually. The prototypes developed with APEX offered a mediating representation, allowing users to be involved in the design process. A group of residents in a city-based care home were involved in the design. The paper describes the design process as well as lessons learned for the future design of AAL systems. © 2017, Springer-Verlag Berlin Heidelberg.
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    Formal Modelling as a Component of User Centred Design
    ( 2018) Paolo Masci ; Harrison,MD ; José Creissac Campos ; 6577 ; 5599
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    Formal verification of interactive computing systems: Opportunities and challenges
    ( 2019) José Creissac Campos ; Harrison,MD ; 5599
    Formal verification has the potential to provide a level of evidence based assurance not possible by more traditional development approaches. For this potential to be fulfilled, its integration into existing practices must be achieved. Starting from this premise, the position paper discusses the opportunities created and the challenges faced by the use of formal verification in the analysis of critical interactive computing systems. Three main challenges are discussed: the accessibility of the modelling stage; support for expressing relevant properties; the need to provide analysis results that are comprehensible to a broad range of expertise including software, safety and human factors. Copyright © 2019 for this paper by its authors.
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    A Generator of User Interface Prototypes for the IVY Workbench
    ( 2019) José Creissac Campos ; Araújo,JM ; Couto,R ; 5599
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    A Generator of User Interface Prototypes for the IVY Workbench
    ( 2019) Couto,R ; Araujo,JM ; José Creissac Campos ; 5599
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    HCI engineering
    ( 2014) José Creissac Campos ; Ziegler,J ; Nigay,L ; 5599
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    HCI-E$$^2$$: HCI Engineering Education
    ( 2022) Baumann,K ; José Creissac Campos ; Dix,A ; Nigay,L ; Palanque,P ; Vanderdonckt,J ; van der Veer,G ; Weyers,B ; 5599 ; 5599
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    HCI-E-2: HCI Engineering Education For Developers, Designers and More
    ( 2021) José Creissac Campos ; 5599
    This workshop aims at identifying, examining, structuring and sharing educational resources and approaches to support the process of teaching/learning Human-Computer Interaction (HCI) Engineering. The broadening of the range of available interaction technologies and their applications, many times in safety and mission critical areas, to novel and less understood application domains, brings the question of how to address this ever-changing nature in university curricula usually static. Beyond, as these technologies are taught in diverse curricula (ranging from Human Factors and psychology to hardcore computer science), we are interested in what the best approaches and best practices are to integrate HCI Engineering topics in the curricula of programs in software engineering, computer science, human-computer interaction, psychology, design, etc. The workshop is proposed on behalf of the IFIP Working Groups 2.7/13.4 on User Interface Engineering and 13.1 on Education in HCI and HCI Curricula.
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    HCI-E2-2023: Second IFIP WG 2.7/13.4 Workshop on HCI Engineering Education
    ( 2023) José Creissac Campos ; 5599
    This second workshop on HCI Engineering Education aims at carrying forward work on identifying, examining, structuring, and sharing educational resources and approaches to support the process of teaching/learning Human-Computer Interaction (HCI) Engineering. The widening range of available interaction technologies and their applications in increasingly varied contexts (private or professional) underlines the importance of teaching HCI Engineering but also the difficulty of taking into account changes and developments in this field in often static university curricula. Besides, as these technologies are taught in diverse curricula (ranging from Human Factors and Psychology to hardcore Computer Science), we are interested in what the best approaches and best practices are to integrate HCI Engineering topics in the curricula of programs in Software Engineering, Computer Science, Human-computer Interaction, Psychology, Design, etc. The workshop is proposed on behalf of the IFIP Working Group 2.7/13.4 on User Interface Engineering. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.