The practical contribution of this research is to remove the UI behavioural conflicts existing in a compound software environment. From the user point of view, editing text in a spreadsheet cell should not be any diff...
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Multimedia services, such as videoconferencing require network and systems performance guarantees in terms of throughput, delay, jitter etc. These parameters, also known as quality of service (QoS), factors vary from ...
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Multimedia services, such as videoconferencing require network and systems performance guarantees in terms of throughput, delay, jitter etc. These parameters, also known as quality of service (QoS), factors vary from user to user and application to application. Existing networking infrastructures such as the Internet do not yet support guarantees of QoS. However we can expect such support in the future. This paper presents our research in experimentation and modelling of schemes for providing multimedia services with guaranteed QoS.
The co-existence of middleware platforms, eg. DCE and CORBA, creates a new problem of heterogeneity-the heterogeneity of middleware platforms. In this paper a partial approach to overcoming this heterogeneity is prese...
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The co-existence of middleware platforms, eg. DCE and CORBA, creates a new problem of heterogeneity-the heterogeneity of middleware platforms. In this paper a partial approach to overcoming this heterogeneity is presented-the translation between different interface definition languages (IDL) and the comparison of interface specifications in different IDLs. In particular, a mapping between DCE IDL and OMG IDL and the corresponding translation tools are presented. Furthermore, various definitions of sub-typing of interface specifications are investigated for their suitability in comparing specifications in different IDLs.
This paper identifies a new heterogeneity - the heterogeneity of middleware platforms. To overcome the interoperability problem caused by this heterogeneity we present an application-level approach - bridges. Various ...
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This paper identifies a new heterogeneity - the heterogeneity of middleware platforms. To overcome the interoperability problem caused by this heterogeneity we present an application-level approach - bridges. Various kinds of bridges are identified, designed and discussed. A proof of concept is given by a case study.
The practical contribution of this research is to remove the UI behavioural conflicts existing in a compound software environment. From the user point of view, editing text in a spreadsheet cell should not be any diff...
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The practical contribution of this research is to remove the UI behavioural conflicts existing in a compound software environment. From the user point of view, editing text in a spreadsheet cell should not be any different from editing text in a text editor or any other integrated software package. However this is not always the case since different UI applications may inherit different UI techniques and behaviours. In this paper, an extended object-oriented model and Documentary Petri Net (DPN) are used to model an 'adaptable user interface' system. In doing so, rule-bases can be added to the DPN model allowing automatic reasoning about the user interface behaviours. Furthermore, formal properties of UI behaviours such as 'liveness' and 'boundedness' can be analyzed by using algorithms based on the formal properties of Petri Nets.
This paper proposes a graphical UI, a CASE tool, for the purpose of specifying and representing trade information, common in electronic commerce. The semantic and structural information associated with trade instances...
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This paper proposes a graphical UI, a CASE tool, for the purpose of specifying and representing trade information, common in electronic commerce. The semantic and structural information associated with trade instances can be extremely complex. Far example, the formal property of Petri nets can be used to represent the different traders' roles or to identify the various trade procedures that will lead to deadlock situations. A simple and intuitive graphical user interface that can represent and characterize the organization of the trade documents is therefore considered useful in facilitating electronic commerce.
We believe that virtual simulation of physical environments is an insufficient basis for building collaborative support systems. In response, we present a locales framework which frames collaboration as the interactio...
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We believe that virtual simulation of physical environments is an insufficient basis for building collaborative support systems. In response, we present a locales framework which frames collaboration as the interaction of individuals within social worlds regardless of whether that interaction is physical or virtual. The overview describes the five aspects of the framework: locale foundations, where locales are the basic structures providing the affordances for the work of social worlds; mutuality in interaction, including presence and awareness issues; individual views of multiple locales of interest, defined by the individual's participation in multiple social worlds; interaction trajectories, capturing the temporal dimensions of interaction; and civic structures, which embed locales and the collaborative work of groups in the larger public sphere.
Discusses some of the problems designers face in building catalogs in large networks and relates them back to the resource discovery problem. Currently many catalogs tend to be built in an ad hoc fashion-which leads t...
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Discusses some of the problems designers face in building catalogs in large networks and relates them back to the resource discovery problem. Currently many catalogs tend to be built in an ad hoc fashion-which leads to a great variety in the quality of publicly accessible network catalogs. Furthermore, the research surrounding these catalogs tends to focus on narrow technical issues-resulting in difficult-to-use catalogs. Addresses this problem by providing a usability framework based on the library science and human computer interaction literature, and demonstrates some of those principles via an example of a prototype. Results are interesting to resource discovery tool developers in that a framework for understanding the general resource discovery problem is provided and some techniques for dealing with those problems are presented.
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