Ivan Elhart | University of Lugano (original) (raw)
Papers by Ivan Elhart
Proceedings of the 7th Augmented Human International Conference 2016 on - AH '16, 2016
Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2015 ACM International Symposium on Wearable Computers - UbiComp '15, 2015
Proceedings of the 7th Augmented Human International Conference 2016 on - AH '16, 2016
Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2015 ACM International Symposium on Wearable Computers - UbiComp '15, 2015
Proceedings of the 4th International Symposium on Pervasive Displays - PerDis '15, 2015
Proceedings of the 4th International Symposium on Pervasive Displays - PerDis '15, 2015
Proceedings of the 2nd ACM International Symposium on Pervasive Displays - PerDis '13, 2013
ABSTRACT Many design decisions need to be made when creating situated public displays that aim to... more ABSTRACT Many design decisions need to be made when creating situated public displays that aim to serve a community. One such decision concerns access to its contents: should users be able to access content remotely, e.g., via a web page, or should this be limited to users who are co-located with the display? A similar decision has to be made for community content upload: do posters need to be co-located with the display or can posts be made from any location? In other words, content display and creation can be 'tethered' to a display or it can be 'free to roam', i.e., accessible from anywhere. In this paper we analyze prior community display deployments in an attempt to explore this space and produce a taxonomy that highlights the inherent design choices. Furthermore, we discuss some of the reasons that may underlie these choices and identify opportunities for design.
Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication - UbiComp '13 Adjunct, 2013
ABSTRACT Social media platforms such as Flicker, Twitter, Instagram, and Facebook have opened up ... more ABSTRACT Social media platforms such as Flicker, Twitter, Instagram, and Facebook have opened up new possibilities for providing content on large public displays. Integrating interactive elements in a public display, such as (virtual) Keyboards and Webcams, can additionally stimulate in-situ content production. Both social media content and such in-situ content are cheap to produce, always fresh, and potentially community sourced, thus increasing relevance for passersby. However, not all social media applications and content entries may be appropriate in a particular display setting and showing user contributed content on public displays requires new forms of content control and scheduling. In this demo we show: 1) a control interface for display owners to manage the overall behavior of their displays, and 2) post-moderation mechanisms for controlling and removing potentially inappropriate user contributed content from public displays. The control interface and moderation mechanisms are designed for a university environment and were inspired by two short pilot test deployments and a focus group with the university officials.
2014 IEEE International Conference on Pervasive Computing and Communication Workshops (PERCOM WORKSHOPS), 2014
ABSTRACT Today's digital signage systems typically show content that has been scheduled w... more ABSTRACT Today's digital signage systems typically show content that has been scheduled well in advance by their respective owners. However, we envision that displays in our environment will soon be able to dynamically adapt to their surroundings and allow viewers as well as display owners to appropriate them by actively selecting and contributing content through interactive public display applications. Such multi-user and multi-application display environments require new forms of application and content scheduling that go beyond a predefined sequence of content. In this paper we present a scheduling framework for public displays, adapted from general scheduling theory, as a common notation that can be used to describe different application and content presentation requirements posed by both display owners and display viewers and define the overall behavior of public displays.
Proceedings of the 11th International Conference on Mobile and Ubiquitous Multimedia - MUM '12, 2012
In the age of online social networks, local communities still play an essential role in supportin... more In the age of online social networks, local communities still play an essential role in supporting social cohesion. In this paper we present a study that explores the design of "interacting places"networked public multimedia services that foster community awareness between local members -in the context of a student community. In order to have interacting places "fit in" with the existing communication practices of the students, we performed and analyzed a set of semi-structured interviews with n=17 students regarding their use of email, social networking services, and instant messaging to stay in touch with others. A follow-up online survey (n=76) then explored how networked public multimedia services could complement these practices. Following a "communicative ecology" approach -a conceptual model that represents the technical, social, and discursive contexts of communicationwe draw up guidelines to support the design of both content and channels (applications) for interacting places in student communities.
Proceedings of The International Symposium on Pervasive Displays - PerDis '14, 2014
ABSTRACT Today's digital signage systems typically show advertisements in the form of ima... more ABSTRACT Today's digital signage systems typically show advertisements in the form of images or short videos that their owners and/or operators have arranged in well-defined sequences well before presentation time. In order to make such displays more attractive, both researchers and advertisers have recently begun to explore the concept of interactive applications that allow passers-by to directly or indirectly control a display's content. To integrate such applications with traditional digital signage concepts requires new forms of shared control over application and content scheduling, ultimately creating multi-user and multi-application display systems that go beyond predefined sequences of content items. In this paper we present a system for scheduling both interactive content and traditional digital signage content on networked public displays. We offer a formal notation for describing such novel scheduling problems, based on a list of requirements for scheduling interactive and concurrently running display applications, and describe a web-based application development framework and API for dynamic application scheduling. We also report on an initial prototype system that we have deployed on a university campus.
ABSTRACT In their influential book "Public space" Carr et al. describe essentia... more ABSTRACT In their influential book "Public space" Carr et al. describe essential human needs that public spaces fulfill: (1) passive engagement with the environment, where we observe what others are doing; (2) active engagement through intellectual challenges posed by the space, or through engagement with the people in it; and (3) excitement of novel discoveries within the space. An often underused resource in public spaces -- public displays -- can be used to stimulate these needs. In this paper we argue for a new research direction that explores how public displays can stimulate such essential needs in public spaces. We describe and conceptualize related processes that occur around public displays, based on in-depth observations of people interacting with a publicly fielded display application in a city center. Our conceptualization is meant to lay the foundations for designing engaging public display systems that stimulate PACD, and for supporting the analysis of existing deployments.
With significant price drops of large LCD panels public displays are "painting" the urban landsca... more With significant price drops of large LCD panels public displays are "painting" the urban landscape. Connected over the Internet they constitute a novel communication medium -a network of open pubic displays. One of the challenges with such a novel communication medium is integrating it with existing user communicative ecologycurrent information and communication technologies that are already well established and highly used by the general population, e.g., Facebook and Instagram. As one of the most popular activities on these networks is photo sharing a possible solution for integrating networked public displays could be in allowing users to use it as both input and output device for images, i.e., allowing them to a) post situated snapshots onto Facebook through an on-display camera and b) show images on the screens taken through Instagram. In order to replicate what is happening with the images online comments and likes posted about images are also shown on the screen. In this demo we show two applications: 1) Moment Machine -a public display application that allows taking situated snapshots through on-display camera and posting them to Facebook; and 2) Moments Gallery -a public display application that shows images, comments, and likes for photos submitted through Instagram and Facebook.
Lecture Notes in Computer Science, 2013
Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication - UbiComp '13 Adjunct, 2013
With significant price drops of large LCD panels public displays are "painting" the urban landsca... more With significant price drops of large LCD panels public displays are "painting" the urban landscape. Connected over the Internet they constitute a novel communication medium -a network of open pubic displays. One of the challenges with such a novel communication medium is integrating it with existing user communicative ecologycurrent information and communication technologies that are already well established and highly used by the general population, e.g., Facebook and Instagram. As one of the most popular activities on these networks is photo sharing a possible solution for integrating networked public displays could be in allowing users to use it as both input and output device for images, i.e., allowing them to a) post situated snapshots onto Facebook through an on-display camera and b) show images on the screens taken through Instagram. In order to replicate what is happening with the images online comments and likes posted about images are also shown on the screen. In this demo we show two applications: 1) Moment Machine -a public display application that allows taking situated snapshots through on-display camera and posting them to Facebook; and 2) Moments Gallery -a public display application that shows images, comments, and likes for photos submitted through Instagram and Facebook.
Proceedings of the 10th International Conference on Mobile and Ubiquitous Multimedia - MUM '11, 2011
ABSTRACT Public displays are becoming a ubiquitous resource in the urban environments due to sign... more ABSTRACT Public displays are becoming a ubiquitous resource in the urban environments due to significant price drops of large LCD panels. However, most public displays are still displaying simple advertisements in the form of slide shows or movie clips, instead of offering locally customized content that resonates with passers-by. So far, creating such customized content has been expensive. As a possible solution we present the concept and architecture for autopoiesic content, i.e., self-generative content that is automatically created by matching local context information with regular scheduled information into content that is highly localized. In this paper we report on the design, operation, and user experience of FunSquare -- an application that uses autopoiesic content to present localized "fun facts" in order to strengthen the feeling of community.
Public displays are progressively embedded in urban settings. Such displays become elements of an... more Public displays are progressively embedded in urban settings. Such displays become elements of an integrated pervasive ecosystem in which various displays with multiple applications are accessed by multiple viewers. Still, many public displays employ content that is based on pre-defined schedules as encountered in conventional digital signage systems. We envision future display deployments embedding many applications that are running concurrently and able to continuously react to users' requests. In this paper, we investigate application selection and control concepts based on a mixed-initiative scenario in which display system and viewers are both involved in the process of content presentation. Our approach is inspired by traditional GUI interaction concepts and design considerations of sensing systems. Hence, this research would inform the design of novel techniques for application selection and control in pervasive display environments.
ABSTRACT Today's digital signage systems typically show content that has been scheduled w... more ABSTRACT Today's digital signage systems typically show content that has been scheduled well in advance by their respective “owners”, i.e., companies or individuals who paid for and/or operate the public display. However, with the shift to open display networks that can obtain content from many sources and the corresponding advances in interaction and sensing technologies, the scheduling requirements in this domain are set to change radically. For example, we envision that displays in our environment will soon be able to adapt to their surroundings and allow viewers to appropriate them by actively selecting and/or contributing content. Such levels of interactivity and context-awareness will require new approaches to content scheduling. In this paper we discuss the challenges faced in developing new forms of application and content scheduling for Open Pervasive Display Networks.
Proceedings of the 7th Augmented Human International Conference 2016 on - AH '16, 2016
Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2015 ACM International Symposium on Wearable Computers - UbiComp '15, 2015
Proceedings of the 7th Augmented Human International Conference 2016 on - AH '16, 2016
Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2015 ACM International Symposium on Wearable Computers - UbiComp '15, 2015
Proceedings of the 4th International Symposium on Pervasive Displays - PerDis '15, 2015
Proceedings of the 4th International Symposium on Pervasive Displays - PerDis '15, 2015
Proceedings of the 2nd ACM International Symposium on Pervasive Displays - PerDis '13, 2013
ABSTRACT Many design decisions need to be made when creating situated public displays that aim to... more ABSTRACT Many design decisions need to be made when creating situated public displays that aim to serve a community. One such decision concerns access to its contents: should users be able to access content remotely, e.g., via a web page, or should this be limited to users who are co-located with the display? A similar decision has to be made for community content upload: do posters need to be co-located with the display or can posts be made from any location? In other words, content display and creation can be 'tethered' to a display or it can be 'free to roam', i.e., accessible from anywhere. In this paper we analyze prior community display deployments in an attempt to explore this space and produce a taxonomy that highlights the inherent design choices. Furthermore, we discuss some of the reasons that may underlie these choices and identify opportunities for design.
Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication - UbiComp '13 Adjunct, 2013
ABSTRACT Social media platforms such as Flicker, Twitter, Instagram, and Facebook have opened up ... more ABSTRACT Social media platforms such as Flicker, Twitter, Instagram, and Facebook have opened up new possibilities for providing content on large public displays. Integrating interactive elements in a public display, such as (virtual) Keyboards and Webcams, can additionally stimulate in-situ content production. Both social media content and such in-situ content are cheap to produce, always fresh, and potentially community sourced, thus increasing relevance for passersby. However, not all social media applications and content entries may be appropriate in a particular display setting and showing user contributed content on public displays requires new forms of content control and scheduling. In this demo we show: 1) a control interface for display owners to manage the overall behavior of their displays, and 2) post-moderation mechanisms for controlling and removing potentially inappropriate user contributed content from public displays. The control interface and moderation mechanisms are designed for a university environment and were inspired by two short pilot test deployments and a focus group with the university officials.
2014 IEEE International Conference on Pervasive Computing and Communication Workshops (PERCOM WORKSHOPS), 2014
ABSTRACT Today's digital signage systems typically show content that has been scheduled w... more ABSTRACT Today's digital signage systems typically show content that has been scheduled well in advance by their respective owners. However, we envision that displays in our environment will soon be able to dynamically adapt to their surroundings and allow viewers as well as display owners to appropriate them by actively selecting and contributing content through interactive public display applications. Such multi-user and multi-application display environments require new forms of application and content scheduling that go beyond a predefined sequence of content. In this paper we present a scheduling framework for public displays, adapted from general scheduling theory, as a common notation that can be used to describe different application and content presentation requirements posed by both display owners and display viewers and define the overall behavior of public displays.
Proceedings of the 11th International Conference on Mobile and Ubiquitous Multimedia - MUM '12, 2012
In the age of online social networks, local communities still play an essential role in supportin... more In the age of online social networks, local communities still play an essential role in supporting social cohesion. In this paper we present a study that explores the design of "interacting places"networked public multimedia services that foster community awareness between local members -in the context of a student community. In order to have interacting places "fit in" with the existing communication practices of the students, we performed and analyzed a set of semi-structured interviews with n=17 students regarding their use of email, social networking services, and instant messaging to stay in touch with others. A follow-up online survey (n=76) then explored how networked public multimedia services could complement these practices. Following a "communicative ecology" approach -a conceptual model that represents the technical, social, and discursive contexts of communicationwe draw up guidelines to support the design of both content and channels (applications) for interacting places in student communities.
Proceedings of The International Symposium on Pervasive Displays - PerDis '14, 2014
ABSTRACT Today's digital signage systems typically show advertisements in the form of ima... more ABSTRACT Today's digital signage systems typically show advertisements in the form of images or short videos that their owners and/or operators have arranged in well-defined sequences well before presentation time. In order to make such displays more attractive, both researchers and advertisers have recently begun to explore the concept of interactive applications that allow passers-by to directly or indirectly control a display's content. To integrate such applications with traditional digital signage concepts requires new forms of shared control over application and content scheduling, ultimately creating multi-user and multi-application display systems that go beyond predefined sequences of content items. In this paper we present a system for scheduling both interactive content and traditional digital signage content on networked public displays. We offer a formal notation for describing such novel scheduling problems, based on a list of requirements for scheduling interactive and concurrently running display applications, and describe a web-based application development framework and API for dynamic application scheduling. We also report on an initial prototype system that we have deployed on a university campus.
ABSTRACT In their influential book "Public space" Carr et al. describe essentia... more ABSTRACT In their influential book "Public space" Carr et al. describe essential human needs that public spaces fulfill: (1) passive engagement with the environment, where we observe what others are doing; (2) active engagement through intellectual challenges posed by the space, or through engagement with the people in it; and (3) excitement of novel discoveries within the space. An often underused resource in public spaces -- public displays -- can be used to stimulate these needs. In this paper we argue for a new research direction that explores how public displays can stimulate such essential needs in public spaces. We describe and conceptualize related processes that occur around public displays, based on in-depth observations of people interacting with a publicly fielded display application in a city center. Our conceptualization is meant to lay the foundations for designing engaging public display systems that stimulate PACD, and for supporting the analysis of existing deployments.
With significant price drops of large LCD panels public displays are "painting" the urban landsca... more With significant price drops of large LCD panels public displays are "painting" the urban landscape. Connected over the Internet they constitute a novel communication medium -a network of open pubic displays. One of the challenges with such a novel communication medium is integrating it with existing user communicative ecologycurrent information and communication technologies that are already well established and highly used by the general population, e.g., Facebook and Instagram. As one of the most popular activities on these networks is photo sharing a possible solution for integrating networked public displays could be in allowing users to use it as both input and output device for images, i.e., allowing them to a) post situated snapshots onto Facebook through an on-display camera and b) show images on the screens taken through Instagram. In order to replicate what is happening with the images online comments and likes posted about images are also shown on the screen. In this demo we show two applications: 1) Moment Machine -a public display application that allows taking situated snapshots through on-display camera and posting them to Facebook; and 2) Moments Gallery -a public display application that shows images, comments, and likes for photos submitted through Instagram and Facebook.
Lecture Notes in Computer Science, 2013
Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication - UbiComp '13 Adjunct, 2013
With significant price drops of large LCD panels public displays are "painting" the urban landsca... more With significant price drops of large LCD panels public displays are "painting" the urban landscape. Connected over the Internet they constitute a novel communication medium -a network of open pubic displays. One of the challenges with such a novel communication medium is integrating it with existing user communicative ecologycurrent information and communication technologies that are already well established and highly used by the general population, e.g., Facebook and Instagram. As one of the most popular activities on these networks is photo sharing a possible solution for integrating networked public displays could be in allowing users to use it as both input and output device for images, i.e., allowing them to a) post situated snapshots onto Facebook through an on-display camera and b) show images on the screens taken through Instagram. In order to replicate what is happening with the images online comments and likes posted about images are also shown on the screen. In this demo we show two applications: 1) Moment Machine -a public display application that allows taking situated snapshots through on-display camera and posting them to Facebook; and 2) Moments Gallery -a public display application that shows images, comments, and likes for photos submitted through Instagram and Facebook.
Proceedings of the 10th International Conference on Mobile and Ubiquitous Multimedia - MUM '11, 2011
ABSTRACT Public displays are becoming a ubiquitous resource in the urban environments due to sign... more ABSTRACT Public displays are becoming a ubiquitous resource in the urban environments due to significant price drops of large LCD panels. However, most public displays are still displaying simple advertisements in the form of slide shows or movie clips, instead of offering locally customized content that resonates with passers-by. So far, creating such customized content has been expensive. As a possible solution we present the concept and architecture for autopoiesic content, i.e., self-generative content that is automatically created by matching local context information with regular scheduled information into content that is highly localized. In this paper we report on the design, operation, and user experience of FunSquare -- an application that uses autopoiesic content to present localized "fun facts" in order to strengthen the feeling of community.
Public displays are progressively embedded in urban settings. Such displays become elements of an... more Public displays are progressively embedded in urban settings. Such displays become elements of an integrated pervasive ecosystem in which various displays with multiple applications are accessed by multiple viewers. Still, many public displays employ content that is based on pre-defined schedules as encountered in conventional digital signage systems. We envision future display deployments embedding many applications that are running concurrently and able to continuously react to users' requests. In this paper, we investigate application selection and control concepts based on a mixed-initiative scenario in which display system and viewers are both involved in the process of content presentation. Our approach is inspired by traditional GUI interaction concepts and design considerations of sensing systems. Hence, this research would inform the design of novel techniques for application selection and control in pervasive display environments.
ABSTRACT Today's digital signage systems typically show content that has been scheduled w... more ABSTRACT Today's digital signage systems typically show content that has been scheduled well in advance by their respective “owners”, i.e., companies or individuals who paid for and/or operate the public display. However, with the shift to open display networks that can obtain content from many sources and the corresponding advances in interaction and sensing technologies, the scheduling requirements in this domain are set to change radically. For example, we envision that displays in our environment will soon be able to adapt to their surroundings and allow viewers to appropriate them by actively selecting and/or contributing content. Such levels of interactivity and context-awareness will require new approaches to content scheduling. In this paper we discuss the challenges faced in developing new forms of application and content scheduling for Open Pervasive Display Networks.