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SIM-OPT in the Loop: Algorithmic Framework for Solving Airport Capacity Problems

The following paper presents an innovative approach for dealing with complex capacity problems in aviation. We introduce a sliding window framework composed by an optimization method with a simulation component. By applying this framework in diverse problems that are dependent on time it is possible to find feasible and close-to-reality solutions in shorter time than the ones that could be achieved by evaluating the problem in the complete time-horizon. The framework can be applied to solve diverse problems in aviation or similar industries. We exemplify the approach with a model of Paris Charles de Gaulle Airport in France.

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Wetenschappelijke publicatie Virtual Reality

Artikel gaat over de inzet van virtual reality bij patiënten met pijn.

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Wetenschappelijke publicatie Virtual Reality

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How location-based messages influence customers’ store visit attitudes

PurposeThis study aims to develop an understanding of how customers of a physical retail store valuate receiving location-based mobile phone messages when they are in proximity of the store. It proposes and tests a model relating two benefits (personalization and location congruency) and two sacrifices (privacy concern and intrusiveness) to message value perceptions and store visit attitudes.Design/methodology/approachThe study uses a vignette-based survey to collect data from a sample of 1,225 customers of a fashion retailer. The postulated research model is estimated using SmartPLS 3.0 with the consistent-PLS algorithm and further validated via a post-hoc test.FindingsThe empirical testing confirms the predictive validity and robustness of the model and reveals that location congruency and intrusiveness are the location-based message characteristics with the strongest effects on message value and store visit attitude.Originality/valueThe paper adds to the underexplored field of store entry research and extends previous location-based messaging studies by integrating personalization, location congruency, privacy concern and intrusiveness into one validated model.

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How location-based messages influence customers’ store visit attitudes

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Personalized physical activity coaching: a machine learning approach

Living a sedentary lifestyle is one of the major causes of numerous health problems. To encourage employees to lead a less sedentary life, the Hanze University started a health promotion program. One of the interventions in the program was the use of an activity tracker to record participants' daily step count. The daily step count served as input for a fortnightly coaching session. In this paper, we investigate the possibility of automating part of the coaching procedure on physical activity by providing personalized feedback throughout the day on a participant's progress in achieving a personal step goal. The gathered step count data was used to train eight different machine learning algorithms to make hourly estimations of the probability of achieving a personalized, daily steps threshold. In 80% of the individual cases, the Random Forest algorithm was the best performing algorithm (mean accuracy = 0.93, range = 0.88–0.99, and mean F1-score = 0.90, range = 0.87–0.94). To demonstrate the practical usefulness of these models, we developed a proof-of-concept Web application that provides personalized feedback about whether a participant is expected to reach his or her daily threshold. We argue that the use of machine learning could become an invaluable asset in the process of automated personalized coaching. The individualized algorithms allow for predicting physical activity during the day and provides the possibility to intervene in time.

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Personalized physical activity coaching: a machine learning approach

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Improving User’s Confidence to Act When Using Advice Algorithms Through Interactive Use of Counterfactuals

In this paper, we explore the design of web-based advice robots to enhance users' confidence in acting upon the provided advice. Drawing from research on algorithm acceptance and explainable AI, we hypothesise four design principles that may encourage interactivity and exploration, thus fostering users' confidence to act. Through a value-oriented prototype experiment and value-oriented semi-structured interviews, we tested these principles, confirming three of them and identifying an additional principle. The four resulting principles: (1) put context questions and resulting advice on one page and allow live, iterative exploration, (2) use action or change oriented questions to adjust the input parameters, (3) actively offer alternative scenarios based on counterfactuals, and (4) show all options instead of only the recommended one(s), appear to contribute to the values of agency and trust. Our study integrates the Design Science Research approach with a Value Sensitive Design approach.

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IMPROVING USER'S CONFIDENCE TO ACT WHEN USING ADVICE ALGORITHMS THROUGH INTERACTIVE USE OF COUNTERFACTUALS

In this paper, we explore the design of web-based advice robots to enhance users' confidence in acting upon the provided advice. Drawing from research on algorithm acceptance and explainable AI, we hypothesise four design principles that may encourage interactivity and exploration, thus fostering users' confidence to act. Through a value-oriented prototype experiment and valueoriented semi-structured interviews, we tested these principles, confirming three of them and identifying an additional principle. The four resulting principles: (1) put context questions and resulting advice on one page and allow live, iterative exploration, (2) use action or change oriented questions to adjust the input parameters, (3) actively offer alternative scenarios based on counterfactuals, and (4) show all options instead of only the recommended one(s), appear to contribute to the values of agency and trust. Our study integrates the Design Science Research approach with a Value Sensitive Design approach.

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Towards a pattern library for algorithmic affordances

The user experience of our daily interactions is increasingly shaped with the aid of AI, mostly as the output of recommendation engines. However, it is less common to present users with possibilities to navigate or adapt such output. In this paper we argue that adding such algorithmic controls can be a potent strategy to create explainable AI and to aid users in building adequate mental models of the system. We describe our efforts to create a pattern library for algorithmic controls: the algorithmic affordances pattern library. The library can aid in bridging research efforts to explore and evaluate algorithmic controls and emerging practices in commercial applications, therewith scaffolding a more evidence-based adoption of algorithmic controls in industry. A first version of the library suggested four distinct categories of algorithmic controls: feeding the algorithm, tuning algorithmic parameters, activating recommendation contexts, and navigating the recommendation space. In this paper we discuss these and reflect on how each of them could aid explainability. Based on this reflection, we unfold a sketch for a future research agenda. The paper also serves as an open invitation to the XAI community to strengthen our approach with things we missed so far.

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Towards a pattern library for algorithmic affordances

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On the Barricades of the Incalculable: Against Algorithm Addiction

Frontiers are usually zones of trafficking, and the moving boundaries of knowledge are no exception. There you may encounter the weird and adorable creatures known as paradoxes. One of my favorites is the sorites paradox, or ‘paradox of the heap’.

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On the Barricades of the Incalculable: Against Algorithm Addiction

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Rage against the artificial intelligence?

People tend to be hesitant toward algorithmic tools, and this aversion potentially affects how innovations in artificial intelligence (AI) are effectively implemented. Explanatory mechanisms for aversion are based on individual or structural issues but often lack reflection on real-world contexts. Our study addresses this gap through a mixed-method approach, analyzing seven cases of AI deployment and their public reception on social media and in news articles. Using the Contextual Integrity framework, we argue that most often it is not the AI technology that is perceived as problematic, but that processes related to transparency, consent, and lack of influence by individuals raise aversion. Future research into aversion should acknowledge that technologies cannot be extricated from their contexts if they aim to understand public perceptions of AI innovation.

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Products 174

SIM-OPT in the Loop: Algorithmic Framework for Solving Airport Capacity Problems

Wetenschappelijke publicatie Virtual Reality

How location-based messages influence customers’ store visit attitudes

Personalized physical activity coaching: a machine learning approach

Improving User’s Confidence to Act When Using Advice Algorithms Through Interactive Use of Counterfactuals

IMPROVING USER'S CONFIDENCE TO ACT WHEN USING ADVICE ALGORITHMS THROUGH INTERACTIVE USE OF COUNTERFACTUALS

Towards a pattern library for algorithmic affordances

On the Barricades of the Incalculable: Against Algorithm Addiction

Rage against the artificial intelligence?

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Products 174

SIM-OPT in the Loop: Algorithmic Framework for Solving Airport Capacity Problems

Wetenschappelijke publicatie Virtual Reality

How location-based messages influence customers’ store visit attitudes

Personalized physical activity coaching: a machine learning approach

Improving User’s Confidence to Act When Using Advice Algorithms Through Interactive Use of Counterfactuals

IMPROVING USER'S CONFIDENCE TO ACT WHEN USING ADVICE ALGORITHMS THROUGH INTERACTIVE USE OF COUNTERFACTUALS

Towards a pattern library for algorithmic affordances

On the Barricades of the Incalculable: Against Algorithm Addiction

Rage against the artificial intelligence?