| 1. |
- Brønsted, Jeppe, et al.
(author)
-
Palpability Support Demonstrated
- 2007
-
In: Embedded and Ubiquitous Computing/Lecture Notes in Computer Science. - Berlin, Heidelberg : Springer Berlin Heidelberg. - 0302-9743 .- 1611-3349. - 9783540770916 ; 4808, s. 294-308
-
Conference paper (peer-reviewed)abstract
- In ubiquitous computing, as more and more devices are embedded into the environment, there is a risk that the user loses the understanding of the system. In normal use this is not always a problem, but when breakdowns occur it is crucial that the user understands the system to be able to handle the situation. The concept of palpable computing, introduced by the PalCom project, denotes systems which support such understandability. In PalCom, a set of prototype scenarios provide input for an open software architecture and a conceptual framework for palpable computing. One of these prototype scenarios is based on the Active Surfaces concept in which therapists rehabilitate physically and mentally impaired children by means of an activity that stimulates the children both physically and cognitively. In this paper we demonstrate how palpability can be supported in a prototype of the Active Surfaces. Services on the tiles have been developed using the PalCom service framework that allows them to be combined into PalCom assemblies. The support for palpability is shown by examples of use scenarios from the work of the therapist who can inspect and alter the runtime state of the tiles to change their configuration and cope with breakdown situations. The prototype implementation runs on a standard PC simulating the network layer and a first reference implementation has been made on the target embedded platform.
|
|
| 2. |
- Grönvall, Erik, et al.
(author)
-
Designing game logics for dynamic Active Surfaces
- 2006
-
Conference paper (peer-reviewed)abstract
- This paper describes the development of a modular system of interactive tiles to support therapists’ in performing therapeutic activities together with impaired children in a swimming pool. Active Surfaces support mobile interactions and dynamic configuration of assemblies of tiles. Each tile represents an interactive unit, able to communicate with other tiles and to exchange data. The tiles can be assembled on a physical and logical service level to support activities of different complexity. This creates technical challenges where assemblies are re-created over time between devices with limited input and output capabilities. Furthermore, Active Surfaces challenge the concept of understandability and how users can make sense of assembled systems with no or limited output capabilities.
|
|
| 3. |
- Svensson Fors, David, et al.
(author)
-
Ad-hoc composition of pervasive services in the PalCom architecture
- 2009
-
In: Proceedings of the 2009 ACM international conference on pervasive services (ICPS'09). - New York, NY, USA : ACM. ; , s. 83-92
-
Conference paper (peer-reviewed)abstract
- We present an architecture supporting ad-hoc composition of pervasive services, an open-source framework that implements it, and the key design principles behind it. The architecture focuses on direct human interaction, supporting combination of devices and services that are not explicitly designed to work together. The focus is on local networks, but extension is possible to wide area networks, interconnecting several local networks. The information about how services are connected and coordinated is collected in a new construct called assemblies. Separating this information from the services themselves allows combination of existing services in new creative ways without changing them. Assemblies can provide new services and in this way be organized hierarchically. The assembly makes the architecture of a pervasive system explicit, providing an overview understandable to users. Discovery and connections across different network technologies is supported. The architecture has been used for applications in large scale networks, and offers mechanisms useful for system integration in general.
|
|
| 4. |
- Svensson Fors, David, et al.
(author)
-
An Architecture for Migrating User Interfaces
- 2004
-
In: TUCS General Publications. - 1239-1905. - 952121385X ; :34, s. 31-44
-
Conference paper (peer-reviewed)abstract
- The MUI project looks at flexible ways of creating user-initiated connections between services in wireless networks. A central idea is to migrate user interfaces from controlled devices to devices with better input/output capabilities. The paper shows the different parts of the MUI architecture, and motivates design choices. An initial implementation and a framework for building MUI services are described.
|
|
| 5. |
- Svensson Fors, David
(author)
-
Assemblies of Pervasive Services
- 2009
-
Doctoral thesis (other academic/artistic)abstract
- Pervasive computing is a vision about computers blending into the background, being there to assist us when we need them, but not requiring constant attention. The vision covers scenarios in the home, at work, and out in the street, and builds on the ongoing development towards an increasing number of embedded computers with network connectivity. The thesis presents the assembly as a lightweight mechanism for combination of devices and services in pervasive computing environments. The assembly is intended to be modifiable by an end user, and to facilitate ad-hoc combinations of services as well as adaptations to changes in services. It does so by separating configuration and coordination, specified in an assembly descriptor, from computation, specified in the services. It supports end-user understanding by using service descriptions that can be inspected and interacted with directly through rendered user interfaces. This gives more flexibility than approaches based on domain-level standardization. An assembly can give rise to services of its own, referred to as synthesized services. The synthesized services can be used by other assemblies in turn, for dealing with complex systems in a hierarchical way. Assemblies and services are elements of the open architecture developed in the project PalCom, and are supported by its communication and discovery protocols. The protocols target resource-constrained devices and situations with varying network connectivity, as required in several of the scenarios studied in PalCom, and they presume no central infrastructure. A central mechanism is the Pacemaker Protocol, which lets devices become aware of each other, using a heartbeat frequency that can be controlled at the application level. A language for assembly descriptors has been defined, tools have been developed, and frameworks and middleware have been implemented for the developer of PalCom services. These have been used by PalCom partners when building prototypes for scenarios, studied in cooperation with prospective end users in the fields of emergency response, landscape architecture, neonatology, and physical-functional and cognitive rehabilitation.
|
|
| 6. |
- Svensson Fors, David, et al.
(author)
-
Composing ad-hoc applications on ad-hoc networks using MUI
- 2005
-
In: [Host publication title missing]. ; , s. 153-164
-
Conference paper (peer-reviewed)abstract
- The MUI framework supports composition of ad-hoc applications from services available on ad-hoc networked devices. MUI is an open-ended framework, relying on migrating user interfaces and standardized data formats for connecting services, allowing existing devices to be connected to new devices without needing any pre-defined knowledge of their services. We illustrate the benefits of the approach with scenarios involving devices like cameras and laptops that are connected through wireless networks.
|
|
| 7. |
- Svensson Fors, David, et al.
(author)
-
Pervasive applications through scripted assemblies of services
- 2007
-
In: Pervasive Services, IEEE International Conference on. ; , s. 301-307
-
Journal article (peer-reviewed)abstract
- This paper proposes a technique for letting end users build pervasive applications by combining services on networked devices. The approach avoids relying on standardized service interfaces which are deemed too limiting, and instead makes use of migratable user interfaces and scripted combinations of services.
|
|
| 8. |
- Svensson Fors, David
(author)
-
Support for Ad-Hoc applications in ubiquitous computing
- 2006
-
Licentiate thesis (other academic/artistic)abstract
- This thesis presents work within the area of ubiquitous computing, an area based on a vision of computers blending into the background. The work has been done within the EU project PalCom that introduces palpable computing. Palpable computing puts a new perspective on ubiquitous computing, by focusing on human understandability. The thesis goals are to allow for ad-hoc combinations of services and nonpreplanned interaction in ubiquitous computing networks. This is not possible with traditional technologies for network services, which are based on standardization of service interfaces at the domain level. In contrast to those, our approach is based on standardization at a generic level, and on self-describing services. We propose techniques for ad-hoc applications that allow users to inspect and combine services, and to specify their cooperation in assemblies. A key point is that the assembly is external to the services. That makes it possible to adapt to changes in one service, without rewriting the other coordinated services. A framework has been implemented for building services that can be combined into ad-hoc applications, and example scenarios have been tested on top of the framework. A browser tool has been built for discovering services, for interacting with them, and for combining them. Finally, discovery and communication protocols for palpable computing have been developed, that support ad-hoc applications.
|
|
| 9. |
- Vonge Corry, Aino, et al.
(author)
-
Traveling Architects – A New Way of Herding Cats
- 2006
-
In: Lecture Notes in Computer Science. - Berlin, Heidelberg : Springer Berlin Heidelberg. - 0302-9743 .- 1611-3349. - 9783540488194 ; 4214/2006, s. 111-126
-
Conference paper (peer-reviewed)abstract
- Making software developers work towards a common goal may be likened to herding cats. If we further spread developers around the globe, we run increased risks of being unable to design and impose coherent software architectures on projects, potentially leading to lower quality of the resulting systems. Based on our experiences in a large, distributed research and development project, PalCom, we propose that employing techniques from active user involvement in general (and from participatory design in particular) may help in designing and sharing quality software architectures. In particular, we present the Traveling Architects technique in which a group of architects visit development locations in order to engage developers and end users in software architecture work. We argue that using techniques such as these may potentially lead to higher quality of software architectures in particular for systems developed in a distributed setting.
|
|
