A. Bozzon
Please Note
57 records found
1
Designing with improvisations
How everyday practices with technologies shape sustainable transitions
Empirically, the research focuses on the transition from gas boilers to heat pumps in Dutch homes. Implementing heat pumps for residential buildings on a large scale should reduce CO2 emissions and save energy while providing comfortable indoor climate of homes. However, in everyday life in households, heat pumps are often not used as the technology developers intended. Ethnography, design research and interviews with value chain professionals are used to gather data and better understand how everyday practices with technologies are performed and understood.
Based on this analysis, I question dominant human-centered design approaches, which prioritize individual users and align with current practices, arguing that they fall short in supporting societal transitions. In my work I take steps towards a more-than-individual-human-centered approach, which embraces the improvisational nature of everyday life and the co-performance of humans and technologies, with the goal of benefitting design work within sustainable transitions. ...
Empirically, the research focuses on the transition from gas boilers to heat pumps in Dutch homes. Implementing heat pumps for residential buildings on a large scale should reduce CO2 emissions and save energy while providing comfortable indoor climate of homes. However, in everyday life in households, heat pumps are often not used as the technology developers intended. Ethnography, design research and interviews with value chain professionals are used to gather data and better understand how everyday practices with technologies are performed and understood.
Based on this analysis, I question dominant human-centered design approaches, which prioritize individual users and align with current practices, arguing that they fall short in supporting societal transitions. In my work I take steps towards a more-than-individual-human-centered approach, which embraces the improvisational nature of everyday life and the co-performance of humans and technologies, with the goal of benefitting design work within sustainable transitions.
This dissertation investigates the integration of conversational AI assistants into manufacturing settings to facilitate knowledge sharing among factory operators. Capitalizing on recent advancements in Natural Language Processing (NLP), particularly in Large Language Models (LLMs), this research investigates the designing and evaluation of conversational AI tools that efficiently capture and share human knowledge on the factory floor while addressing operator needs and concerns. The introduction of conversational AI assistants for knowledge sharing—referred to as cognitive assistants (CA) in this work—in factory environments promises significant benefits but comes with numerous challenges.... ...
This dissertation investigates the integration of conversational AI assistants into manufacturing settings to facilitate knowledge sharing among factory operators. Capitalizing on recent advancements in Natural Language Processing (NLP), particularly in Large Language Models (LLMs), this research investigates the designing and evaluation of conversational AI tools that efficiently capture and share human knowledge on the factory floor while addressing operator needs and concerns. The introduction of conversational AI assistants for knowledge sharing—referred to as cognitive assistants (CA) in this work—in factory environments promises significant benefits but comes with numerous challenges....
Pair Sensemaking of Personal Data
An Approach for Fostering Reflection on Personal Experiences
Objective: To address this gap, this dissertation introduces and develops the pair sensemaking of personal data approach—a novel method for fostering reflection through pair engagement with personal data. This approach emphasizes the integration of both one’s own and others’ data, dyadic comparison within subjective data representations, and reciprocal, reflective dialogues between pairs to co-construct self-knowledge and deepen personal reflection. To realize this objective, the thesis adopts a progressive, mixed-methods research strategy, unfolding across three empirical studies. Each study incrementally explores and refines how pair sensemaking of personal data can be effectively designed to enhance reflective engagement and foster meaningful insights into lived experiences. ...
Objective: To address this gap, this dissertation introduces and develops the pair sensemaking of personal data approach—a novel method for fostering reflection through pair engagement with personal data. This approach emphasizes the integration of both one’s own and others’ data, dyadic comparison within subjective data representations, and reciprocal, reflective dialogues between pairs to co-construct self-knowledge and deepen personal reflection. To realize this objective, the thesis adopts a progressive, mixed-methods research strategy, unfolding across three empirical studies. Each study incrementally explores and refines how pair sensemaking of personal data can be effectively designed to enhance reflective engagement and foster meaningful insights into lived experiences.
This thesis investigates the dual role of CAs in enterprises: as work assistants for employees and as facilitators of crowdsourcing. By acting as work assistants, CAs interact with a broad range of employees, making them well-suited to gather valuable insights that contribute to the company’s knowledge base and support collaborative problem-solving. The central research question explores how to effectively engage and motivate employees in this crowdsourcing process through CA personality design, which is relatively unexplored. Drawing on the "Computers Are Social Actors" (CASA) framework by Nass et al. (1994), this thesis examines CA personality design, aiming to enhance human-CA interaction by eliciting social responses from employees and thereby increasing their engagement.
We approached these research questions from three perspectives: (1) designing and specifying CA personalities for effective implementation in enterprises, (2) identifying the most and least promising qualities of CA personality designs in this context, and (3) designing an empirical study within the enterprise to measure which personality archetype design is the most effective.
We reviewed literature on the context of conversational crowdsourcing in enterprise settings, and CA design methods with a focus on CA anthropomorphism. These findings informed the initial design phase, where CA personality archetypes were tested in an enterprise environment. Based on these insights, we developed design guidelines for enterprise CA personality design. After refining the archetypes, we proposed three unique CA personalities aimed at enhancing employee participation in enterprise crowdsourcing through their interactions with CAs. These archetypes were then implemented in the enterprise's internal chat platform for an experiment, where employee interactions with the CAs were collected and analysed both quantitatively and qualitatively.
The results of our experiment reveal how different CA personalities impact user engagement in enterprise crowdsourcing, demonstrating how distinct CA personalities can be effectively translated into LLM prompts and perceived by users. The study also highlights the relationship between CA personality and the triggering of users' social responses, as observed through sentiment analysis. Additionally, our research identifies the challenge of balancing social engagement with maintaining professionalism in enterprise CAs to build user trust.
This thesis concludes with a discussion of the findings and their implications for future research in enterprise CA design.
...
This thesis investigates the dual role of CAs in enterprises: as work assistants for employees and as facilitators of crowdsourcing. By acting as work assistants, CAs interact with a broad range of employees, making them well-suited to gather valuable insights that contribute to the company’s knowledge base and support collaborative problem-solving. The central research question explores how to effectively engage and motivate employees in this crowdsourcing process through CA personality design, which is relatively unexplored. Drawing on the "Computers Are Social Actors" (CASA) framework by Nass et al. (1994), this thesis examines CA personality design, aiming to enhance human-CA interaction by eliciting social responses from employees and thereby increasing their engagement.
We approached these research questions from three perspectives: (1) designing and specifying CA personalities for effective implementation in enterprises, (2) identifying the most and least promising qualities of CA personality designs in this context, and (3) designing an empirical study within the enterprise to measure which personality archetype design is the most effective.
We reviewed literature on the context of conversational crowdsourcing in enterprise settings, and CA design methods with a focus on CA anthropomorphism. These findings informed the initial design phase, where CA personality archetypes were tested in an enterprise environment. Based on these insights, we developed design guidelines for enterprise CA personality design. After refining the archetypes, we proposed three unique CA personalities aimed at enhancing employee participation in enterprise crowdsourcing through their interactions with CAs. These archetypes were then implemented in the enterprise's internal chat platform for an experiment, where employee interactions with the CAs were collected and analysed both quantitatively and qualitatively.
The results of our experiment reveal how different CA personalities impact user engagement in enterprise crowdsourcing, demonstrating how distinct CA personalities can be effectively translated into LLM prompts and perceived by users. The study also highlights the relationship between CA personality and the triggering of users' social responses, as observed through sentiment analysis. Additionally, our research identifies the challenge of balancing social engagement with maintaining professionalism in enterprise CAs to build user trust.
This thesis concludes with a discussion of the findings and their implications for future research in enterprise CA design.
Designing the future role of human operators in an autonomous bus system
A case study on Autonomous Airside Operations in Schiphol Airport
The study employs a human-centered design approach since the successful integration of technology relies not only on its technical capabilities but also on human operators, who will work in and interact with an autonomous bus system. By placing humans at the center of the design process, a valuable future human operator role is created, that contributes to the successful implementation of an autonomous bus system in AAO.
To emphathize with the current bus operations, context studies at Schiphol Airport are conducted with 3 key roles in the current bus operation. Additionally, 11 expert interviews were conducted to gather different perspectives on the future human operator role in AAO.
The context research revealed 4 current operator responsibilities besides driving-related tasks. Additionally, based on the expert interviews, 5 future human operator responsibilities in an Autonomous Airside Operations are identified. Combinations between current and future responsibilities resulted in the design of 4 potential future scenarios, each with a different future human operator role.
The study provides 4 human operator roles in potential future scenarios where human operators remain crucial in an autonomous bus system, which is: (1) the role of the safety driver to enable autonomous driving as an addition to manual operations; (2) the role of host/hostess or fleet coordinator to provide onboard assistance; (3) the role of the (de)boarding assistant to ensure a safe boarding and deboarding procedure; and (4) the role of the rescuer to immediately operate in case of an emergency. These scenarios are further developed into animation videos, which serve as speculative design artifacts to envision, reflect, and discuss potential future scenarios.
...
The study employs a human-centered design approach since the successful integration of technology relies not only on its technical capabilities but also on human operators, who will work in and interact with an autonomous bus system. By placing humans at the center of the design process, a valuable future human operator role is created, that contributes to the successful implementation of an autonomous bus system in AAO.
To emphathize with the current bus operations, context studies at Schiphol Airport are conducted with 3 key roles in the current bus operation. Additionally, 11 expert interviews were conducted to gather different perspectives on the future human operator role in AAO.
The context research revealed 4 current operator responsibilities besides driving-related tasks. Additionally, based on the expert interviews, 5 future human operator responsibilities in an Autonomous Airside Operations are identified. Combinations between current and future responsibilities resulted in the design of 4 potential future scenarios, each with a different future human operator role.
The study provides 4 human operator roles in potential future scenarios where human operators remain crucial in an autonomous bus system, which is: (1) the role of the safety driver to enable autonomous driving as an addition to manual operations; (2) the role of host/hostess or fleet coordinator to provide onboard assistance; (3) the role of the (de)boarding assistant to ensure a safe boarding and deboarding procedure; and (4) the role of the rescuer to immediately operate in case of an emergency. These scenarios are further developed into animation videos, which serve as speculative design artifacts to envision, reflect, and discuss potential future scenarios.
Amplifying the propositional learning using LLMs
Design process augmentation
However, this rapid growth has brought its own set of challenges. The proliferation of ML models and related artifacts, such as datasets, have brought abundant information during the ML lifecycle. The descriptive and property information of these artifacts is referred as metadata. Yet current practices, such as model cards used in public model zoos and tools to track metadata within scripts, cannot fully captured the metadata of these artifacts, let alone a standardized approach for their management, and access. In addition, the prevailing practice of managing ML/DL scripts via traditional software repositories, while adequate for software engineering, falls short in addressing the unique needs of ML workflows, such as model reuse and comparative analysis. These practices hinder the effective use of structured and comprehensive metadata representation. This disconnect points to a pressing need for improved methodologies and tools in the ML field.
In response to these challenges, this thesis delves into the development and exploitation of structured metadata representations within ML model zoos. In Chapter 2, we first propose a metamodel that represent different types of metadata, thus transforming the metadata from being merely descriptive to being queryable and machine-readable. The structured nature of our metamodel allows for more efficient querying and retrieval of information, which is a substantial improvement over the traditional, text-based descriptions.
Additionally, the thesis explores the use of metadata to optimize various ML processes, particularly in the selection of appropriate models for specific tasks, i.e., model inference and fine-tuning. In Chapter 3, we investigate the optimization of ML inference queries in heterogeneous model zoos using a Mixed-Integer-Programming-based optimizer. This optimizer, which considers multiple objectives such as accuracy and inference speed, provides a robust framework for model selection and execution planning. In Chapter 4, the research extends to model selection for fine-tuning. We investigate on predicting model performance, particularly accuracy, in scenarios where data domains shift, thus negating the need for constant model fine-tuning. By selectively choosing only the most promising candidates, this method substantially lowers the computational burden and associated costs of extensive model fine-tuning.
Overall, this thesis investigates the representation and application of metadata. The insights and methodologies presented not only improve the efficiency and effectiveness of ML workflows but also pave the way for further exploration in the integration of metadata within ML practices, highlighting the continual development and potential for advancements in ML.
...
However, this rapid growth has brought its own set of challenges. The proliferation of ML models and related artifacts, such as datasets, have brought abundant information during the ML lifecycle. The descriptive and property information of these artifacts is referred as metadata. Yet current practices, such as model cards used in public model zoos and tools to track metadata within scripts, cannot fully captured the metadata of these artifacts, let alone a standardized approach for their management, and access. In addition, the prevailing practice of managing ML/DL scripts via traditional software repositories, while adequate for software engineering, falls short in addressing the unique needs of ML workflows, such as model reuse and comparative analysis. These practices hinder the effective use of structured and comprehensive metadata representation. This disconnect points to a pressing need for improved methodologies and tools in the ML field.
In response to these challenges, this thesis delves into the development and exploitation of structured metadata representations within ML model zoos. In Chapter 2, we first propose a metamodel that represent different types of metadata, thus transforming the metadata from being merely descriptive to being queryable and machine-readable. The structured nature of our metamodel allows for more efficient querying and retrieval of information, which is a substantial improvement over the traditional, text-based descriptions.
Additionally, the thesis explores the use of metadata to optimize various ML processes, particularly in the selection of appropriate models for specific tasks, i.e., model inference and fine-tuning. In Chapter 3, we investigate the optimization of ML inference queries in heterogeneous model zoos using a Mixed-Integer-Programming-based optimizer. This optimizer, which considers multiple objectives such as accuracy and inference speed, provides a robust framework for model selection and execution planning. In Chapter 4, the research extends to model selection for fine-tuning. We investigate on predicting model performance, particularly accuracy, in scenarios where data domains shift, thus negating the need for constant model fine-tuning. By selectively choosing only the most promising candidates, this method substantially lowers the computational burden and associated costs of extensive model fine-tuning.
Overall, this thesis investigates the representation and application of metadata. The insights and methodologies presented not only improve the efficiency and effectiveness of ML workflows but also pave the way for further exploration in the integration of metadata within ML practices, highlighting the continual development and potential for advancements in ML.
On the other hand, crowdsourcing has been successfully utilized in other domains for annotating different modalities (text, image, video, audio), despite the unreliable pool of expertise on online platforms. Commercially successful projects have utilized the crowd, which provided annotations of adequate quality. These annotations were later used to fuel machine learning methods that rely on bulks of annotated data to perform automatic classification, regression, and detection tasks. However, due to the complexity of music as an artifact, there are still only a few examples where the crowd was integrated into any form outside of subjective annotation tasks (e.g., indicate the mood of the excerpt).
In this thesis, we tackle this research gap of integrating the crowd in the annotation processes of music compositions. We surveyed current practices on Optical Music Recognition to identify parts where the crowd could assist, alongside proposing hybrid annotation workflows for music compositions. We studied the capabilities of online participants with unknown musical expertise, quantified their musical abilities, and related them to their performance in music annotation tasks. With our goal being to identify ways to expand the preservation efforts for classical music through the assistance of the general public, we investigated potential online sources of music information and prospective participants outside the currently available crowdsourcing platforms. To that end, we studied how composers’ popularity manifests on community-driven platforms through the interactions of music enthusiasts online. We also conducted interviews and focus group discussions with experts and semi-experts, to understand their quality requirements on semantically-rich digital music scores, and identified transcription patterns that could inform our task designs. We finally delivered our system architecture, which combines computer vision and algorithmic scheduling, with microtasks designed to be performed by human annotators in parallel.
Our findings show that with the right methods to quantify the musical competence of a person, paired with careful design of the annotation tasks and interfaces, we can successfully integrate the crowd in the music annotation processes, to generate meaningful and useful information regarding classical music compositions and beyond. This thesis enables future research by showcasing the versatility of the crowd and providing task design methods to accommodate their lack of formal training in the field. It also provides experimental methods to reliably identify how different music composition elements affect the crowd’s performance, alongside proposing user interface elements that can mediate the complexity of the artifacts. Practices such as those presented in this thesis can lead to scaling up our digitization efforts, generating accurate and useful annotations through the crowd, even in such domain-specific and knowledge-intensive topics as classical music compositions. ...
On the other hand, crowdsourcing has been successfully utilized in other domains for annotating different modalities (text, image, video, audio), despite the unreliable pool of expertise on online platforms. Commercially successful projects have utilized the crowd, which provided annotations of adequate quality. These annotations were later used to fuel machine learning methods that rely on bulks of annotated data to perform automatic classification, regression, and detection tasks. However, due to the complexity of music as an artifact, there are still only a few examples where the crowd was integrated into any form outside of subjective annotation tasks (e.g., indicate the mood of the excerpt).
In this thesis, we tackle this research gap of integrating the crowd in the annotation processes of music compositions. We surveyed current practices on Optical Music Recognition to identify parts where the crowd could assist, alongside proposing hybrid annotation workflows for music compositions. We studied the capabilities of online participants with unknown musical expertise, quantified their musical abilities, and related them to their performance in music annotation tasks. With our goal being to identify ways to expand the preservation efforts for classical music through the assistance of the general public, we investigated potential online sources of music information and prospective participants outside the currently available crowdsourcing platforms. To that end, we studied how composers’ popularity manifests on community-driven platforms through the interactions of music enthusiasts online. We also conducted interviews and focus group discussions with experts and semi-experts, to understand their quality requirements on semantically-rich digital music scores, and identified transcription patterns that could inform our task designs. We finally delivered our system architecture, which combines computer vision and algorithmic scheduling, with microtasks designed to be performed by human annotators in parallel.
Our findings show that with the right methods to quantify the musical competence of a person, paired with careful design of the annotation tasks and interfaces, we can successfully integrate the crowd in the music annotation processes, to generate meaningful and useful information regarding classical music compositions and beyond. This thesis enables future research by showcasing the versatility of the crowd and providing task design methods to accommodate their lack of formal training in the field. It also provides experimental methods to reliably identify how different music composition elements affect the crowd’s performance, alongside proposing user interface elements that can mediate the complexity of the artifacts. Practices such as those presented in this thesis can lead to scaling up our digitization efforts, generating accurate and useful annotations through the crowd, even in such domain-specific and knowledge-intensive topics as classical music compositions.
This thesis is focused on investigating the annotation method used in the development of the LAION- Aesthetics V2 datasets and comparing it to other annotation methods for measuring aesthetics. The purpose is to explore whether there are more suitable alternatives to the current annotation method (where people are asked to annotate images with the instruction ”how much do you like this image on a scale from 1 to 10?”, (Schuhmann, 2022) which is not backed by literature to actually measure aesthetics), and to evaluate the alignment between the LAION Aesthetics Predictor scores and human ratings.
This thesis explores different distinct levels of inquiry: one focuses on the design of instructions for image annotation tasks (alternative task design), while the other centers around measuring aesthetics during the annotation process (alternative metrics). Both lines of inquiry are supported by relevant literature, indicating their potential capacity to capture aesthetics. In addition to comparing alternative annotation methods, this thesis investigates three hypotheses related to the annotation of aesthetics within the project’s context.
Four experiments are conducted using crowdsourcing to compare alternative task design and alternative metrics. The experiments include semantic concept activation, different phrasing of the annotation instruction, and alternative modalities (such as ranking and two-alternative forced choice). Next to these four experiments, a separate fifth experiment is deployed which looks into the evaluation of image content versus overall image liking. Two post hoc analyses are performed, one which compares scores that the LAION Aesthetics predictor assigns to the stimulus set to human image liking ratings, and one examining the influence of region on image liking ratings.
The LAION aesthetics approach performed equal to the alternatives with scientific backing. The ranking treatment even performed worse. For this data, region did not impact image liking ratings. No significant difference was found between participants’ overall image liking and content liking. The LAION Aesthetics predictor scores partially aligned with human liking ratings but showed some disparities, par- ticularly in extreme ratings. Qualitative analysis suggests that more research is necessary to make a judgement on whether ”liking” is a relevant and appropriate approach for capturing aesthetics.
The limitations of the experiments include small sample sizes and the focus on a specific image class (buildings). Recommendations for future research include exploring different image classes, investigating other ranking modalities, and considering n-alternative forced choice experiments. It is also suggested to examine the influence of regions on aesthetic experiences in more detail, explore Gibbs Sampling with People for measuring image aesthetics, and explore different demographic groups and contexts.
...
This thesis is focused on investigating the annotation method used in the development of the LAION- Aesthetics V2 datasets and comparing it to other annotation methods for measuring aesthetics. The purpose is to explore whether there are more suitable alternatives to the current annotation method (where people are asked to annotate images with the instruction ”how much do you like this image on a scale from 1 to 10?”, (Schuhmann, 2022) which is not backed by literature to actually measure aesthetics), and to evaluate the alignment between the LAION Aesthetics Predictor scores and human ratings.
This thesis explores different distinct levels of inquiry: one focuses on the design of instructions for image annotation tasks (alternative task design), while the other centers around measuring aesthetics during the annotation process (alternative metrics). Both lines of inquiry are supported by relevant literature, indicating their potential capacity to capture aesthetics. In addition to comparing alternative annotation methods, this thesis investigates three hypotheses related to the annotation of aesthetics within the project’s context.
Four experiments are conducted using crowdsourcing to compare alternative task design and alternative metrics. The experiments include semantic concept activation, different phrasing of the annotation instruction, and alternative modalities (such as ranking and two-alternative forced choice). Next to these four experiments, a separate fifth experiment is deployed which looks into the evaluation of image content versus overall image liking. Two post hoc analyses are performed, one which compares scores that the LAION Aesthetics predictor assigns to the stimulus set to human image liking ratings, and one examining the influence of region on image liking ratings.
The LAION aesthetics approach performed equal to the alternatives with scientific backing. The ranking treatment even performed worse. For this data, region did not impact image liking ratings. No significant difference was found between participants’ overall image liking and content liking. The LAION Aesthetics predictor scores partially aligned with human liking ratings but showed some disparities, par- ticularly in extreme ratings. Qualitative analysis suggests that more research is necessary to make a judgement on whether ”liking” is a relevant and appropriate approach for capturing aesthetics.
The limitations of the experiments include small sample sizes and the focus on a specific image class (buildings). Recommendations for future research include exploring different image classes, investigating other ranking modalities, and considering n-alternative forced choice experiments. It is also suggested to examine the influence of regions on aesthetic experiences in more detail, explore Gibbs Sampling with People for measuring image aesthetics, and explore different demographic groups and contexts.
The project employs the Agile methodology and the Double Diamond Model to iteratively design user interfaces that visually articulate informed consent for ICT (i.e. laptop) data sharing for CE processes, such as laptop’s repair, reuse, and return. The main objective is to help cultivate a more sustainable ICT service in TU Delft by enhancing CE data sharing transparency and offering incentives for informed consent with the User Interface (UI) design. The design of the user interface aims to simplify the comprehension of consent for data sharing, bring more transparency, and raise awareness about data privacy. This approach is expected to motivate the research staff to actively participate in data sharing, thereby contributing to sustainability efforts within the organization. The thesis culminates with the presentation of key findings and potential avenues for future exploration and research, providing valuable insights into the interplay of data privacy, user experience, and sustainability within ICT services. ...
The project employs the Agile methodology and the Double Diamond Model to iteratively design user interfaces that visually articulate informed consent for ICT (i.e. laptop) data sharing for CE processes, such as laptop’s repair, reuse, and return. The main objective is to help cultivate a more sustainable ICT service in TU Delft by enhancing CE data sharing transparency and offering incentives for informed consent with the User Interface (UI) design. The design of the user interface aims to simplify the comprehension of consent for data sharing, bring more transparency, and raise awareness about data privacy. This approach is expected to motivate the research staff to actively participate in data sharing, thereby contributing to sustainability efforts within the organization. The thesis culminates with the presentation of key findings and potential avenues for future exploration and research, providing valuable insights into the interplay of data privacy, user experience, and sustainability within ICT services.
To achieve this objective, an extensive analysis of the literature was done to establish the state of the art. All aspects necessary to create a single application were investigated to define how much of the literature fully or partly implemented them. Findings of the literature were summarized through definition, progress, limitations and improvements.
Based on the analysis, a proof of concept was designed and implemented, which established a virtual reality framework for real-time analysis and exploration of heterogeneous urban data. The framework involved the development of both a client and server applications with real-time communication. The server application processes and caches input data based on a structured configuration file, while the client application renders and visualizes points and shapes based on instructions from the server. The layered processing approach in this proof of concept facilitated real-time data handling and exploration. Which also makes it possible to collaborate with multiple people working on or manipulating the same data at the same time.
Evaluation of the server application showed its capability of processing over 1.000.000 objects from GeoJSON data. After initial rendering, the client application could update over 4.000 objects with a latency of just 200ms, which is considered to be interactive. Feedback from experts further supported the validation of the proof of concept application as a viable solution to the research question.
This research established the validity of a configurable real-time analysis and exploration solution in virtual reality. With further development and research, this tool holds potential for being used in diverse environments dealing with urban data. ...
To achieve this objective, an extensive analysis of the literature was done to establish the state of the art. All aspects necessary to create a single application were investigated to define how much of the literature fully or partly implemented them. Findings of the literature were summarized through definition, progress, limitations and improvements.
Based on the analysis, a proof of concept was designed and implemented, which established a virtual reality framework for real-time analysis and exploration of heterogeneous urban data. The framework involved the development of both a client and server applications with real-time communication. The server application processes and caches input data based on a structured configuration file, while the client application renders and visualizes points and shapes based on instructions from the server. The layered processing approach in this proof of concept facilitated real-time data handling and exploration. Which also makes it possible to collaborate with multiple people working on or manipulating the same data at the same time.
Evaluation of the server application showed its capability of processing over 1.000.000 objects from GeoJSON data. After initial rendering, the client application could update over 4.000 objects with a latency of just 200ms, which is considered to be interactive. Feedback from experts further supported the validation of the proof of concept application as a viable solution to the research question.
This research established the validity of a configurable real-time analysis and exploration solution in virtual reality. With further development and research, this tool holds potential for being used in diverse environments dealing with urban data.
Elucidating a ‘black-box’ transcends explaining the algorithm
Exploring Explainable AI (XAI) as a way to address AI implementation challenges in the Dutch public sector
easy to understand - is one of the ways to responsibly design and implement AI systems. This research looks into AI-supported public decision-making processes in the Netherlands and the role and possible contribution of XAI in such a context. To this end, I conducted a mixed-method qualitative study; interviewing sixteen respondents from three key-actor groups within two Dutch national public sector executive bodies, additionally performing three observations and document-analysis. Differentiating between different phases of an AI system’s implementation life-cycle, the study unveils how the respective actors - managers, data scientists and domain experts/(potential) AI users - encounter various challenges in bringing an AI system from idea to production. The empirical findings show that many AI systems, whilst technically developed, are not deployed or adopted by the wider organisation. The study discerns the challenges hindering the AI implementation process from an organisational,
human and technical point of view. Moreover, the study highlights the need to approach XAI from a multi-purpose, multi-actor perspective; both acknowledging that various actors need different kinds of explanations, but also bridging different respective professional worldviews to apprehend one another.
XAI is often seen as a one-size-fits-all solution for various implementation challenges, however the study shows that certain challenges need to be addressed at least beyond traditional ways of XAI from a computer science perspective, and perhaps beyond XAI all together. As such, the insights of this
thesis contribute to generating a more realistic idea about the opportunities and limitations of XAI, within real-world AI implementation processes in the public sector. ...
easy to understand - is one of the ways to responsibly design and implement AI systems. This research looks into AI-supported public decision-making processes in the Netherlands and the role and possible contribution of XAI in such a context. To this end, I conducted a mixed-method qualitative study; interviewing sixteen respondents from three key-actor groups within two Dutch national public sector executive bodies, additionally performing three observations and document-analysis. Differentiating between different phases of an AI system’s implementation life-cycle, the study unveils how the respective actors - managers, data scientists and domain experts/(potential) AI users - encounter various challenges in bringing an AI system from idea to production. The empirical findings show that many AI systems, whilst technically developed, are not deployed or adopted by the wider organisation. The study discerns the challenges hindering the AI implementation process from an organisational,
human and technical point of view. Moreover, the study highlights the need to approach XAI from a multi-purpose, multi-actor perspective; both acknowledging that various actors need different kinds of explanations, but also bridging different respective professional worldviews to apprehend one another.
XAI is often seen as a one-size-fits-all solution for various implementation challenges, however the study shows that certain challenges need to be addressed at least beyond traditional ways of XAI from a computer science perspective, and perhaps beyond XAI all together. As such, the insights of this
thesis contribute to generating a more realistic idea about the opportunities and limitations of XAI, within real-world AI implementation processes in the public sector.
Enriching Machine Learning Model Metadata
Collecting performance metadata through automatic evaluation
Surprisingly, these hazards persist in applications where ML technology has been deployed, despite the increasing amount of research performed by the ML research community. In this thesis, we task ourselves with the challenges of understanding the reasons for the subsistence of hazardous system’s output failures and of hazardous development and deployment processes in practice, and of developing solutions to further diagnose these hazardous failures (especially in the system’s outputs). For that, we investigate further the nature of the potential gap between research and the practices of those developers who build and deploy the systems. To do so, we survey major related ML research directions, surface developers practices and challenges, and search for types of (mis)alignment between theory and practices. There, among others, we find a lack of technical support for ML developers to identify the potential failures of their systems. Hence, we then tackle the development and evaluation of a human-in-the-loop, explainability-based, failure diagnosis method and user-interface for computer vision systems...
...
Surprisingly, these hazards persist in applications where ML technology has been deployed, despite the increasing amount of research performed by the ML research community. In this thesis, we task ourselves with the challenges of understanding the reasons for the subsistence of hazardous system’s output failures and of hazardous development and deployment processes in practice, and of developing solutions to further diagnose these hazardous failures (especially in the system’s outputs). For that, we investigate further the nature of the potential gap between research and the practices of those developers who build and deploy the systems. To do so, we survey major related ML research directions, surface developers practices and challenges, and search for types of (mis)alignment between theory and practices. There, among others, we find a lack of technical support for ML developers to identify the potential failures of their systems. Hence, we then tackle the development and evaluation of a human-in-the-loop, explainability-based, failure diagnosis method and user-interface for computer vision systems...