Current tools for user interface development fail to address three major challenges: diversity and distribution of computer platforms, diversity of users and contexts of use, everincreasing amounts of data. I argue that we should define interactions as first-class objects and develop interaction

We describe a programming language called Symmetric Lisp that treats environments as first­class objects. Symmetric Lisp allows programmers to write expressions that evaluate to environments, and to create and denote variables and constants of type environment as well. One consequence

is either left to the application developer or hidden from the programmer and provided in an ad hoc manner behind the scene. We plead for an intermediate approach where failure detectors are first class objects. We view failure detection as an abstraction, the complexity of which is encapsulated behind well

--- have deserved a promotion to first--class objects of the language. It is proposed to resolve the somewhat awkward dichotomy of exceptions and exception occurrences as it exists now in Ada 95 by treating exceptions as (tagged) types, and exception occurrences as their instances. Keywords. Object

Object-oriented data models have proven to be popular tools for developing complex database applications since they provide expressive modelling power, which allows us to naturally model real-world entities and semantics. However, typically the modelling of inter-object associations has been

This work provides a new view of contexts by defining them as primitives data types whose instances can be interpreted in two ways: as structured binding environments and as first-class objects. To achieve such a goal, an implementation is presented in which contexts are completely configured

In scalable concurrent architectures, the performance of a parallel algorithm depends on the resource management policies used. Such policies determine, for example, how data is partitioned and distributed and how processes are scheduled. For different problem sizes or architectures, different policies may be more efficient. In particular, the performance of a parallel algorithm obtained by using a particular policy can be The research described has been made possible by support from the Office of Naval Research (ONR contract numbers N00014-90-J-1899 and N00014-93-1-0273), by an Incentives for Excellence Award from the Digital Equipment Corporation Faculty Program, and by joint support from the Defense Advanced Research Projects Agency and the National Science Foundation (NSF CCR 90-07195). y The authors thank the referees for providing several constructive suggestions. The authors thank Daniel Sturman for his development of Broadway. Svend Frølund, Daniel Sturman and Wooyoung Kim ...

coupling increases complexity and reduces reusability. Object interactions need to be first class objects from design to implementation. Our research provides a unified approach to model and implement these interactions as first class objects. During analysis and design, they are modeled using Dyna

This paper presents the general-purpose programming language Ellie. Ellie supports fine-grained objects and parallelism. As something particular, classes, types, blocks, and methods are all abstracted by first class objects. The main goal of Ellie has been to obtain a very flexible, machine

Video as a first-class object for promoting scientific research, innovation and training