Structured graphics is useful for building applications that use a direct manipulation metaphor. Object-oriented languages offer inheritance, encapsulation, and runtime binding of operations to objects. Unfortunately, standard structured graphics packages do not use an object-oriented model, and object-oriented systems do not provide general-purpose structured graphics, relying instead on low-l...

ion of Object-Oriented Data Models Karl J. Lieberherr, Paul Bergstein, Ignacio Silva-Lepe Northeastern University, College of Computer Science Cullinane Hall, 360 Huntington Ave., Boston MA 02115 [email protected] phone: (617) 437 20 77 Abstract The contributions of this paper are two-fold: First we introduce a novel, axiomatically de ned object-oriented data model, called the ...

An important issue in implementation of a GIS system is preparation of data to be entered in GIS. To produce spatial data for GIS using photogrammetric techniques, conventional method is to apply photogrammetric and GIS systems individually (off-line procedure). This approach is costly, time consuming and somehow unreliable due to the fact that 3D photogrammetric model is not available at the ...

Methodology assessment requires metrics. Large scale metrics collection requires a persistent data store. Persistent data stores require a model for the database design. Such models reeect the assumptions of their designers; e.g. waterfall development , non-object-oriented languages, etc. We review several models for metrics repositories to conclude that most of the existing metrics repositorie...

Most of the current concurrent object-oriented approaches do not address the issue of separation of concern between synchronization and scheduling controls inside the concurrent objects. This paper presents a concurrent object-oriented model in which a concurrent object, which represents a shared resource abstraction in our model, is decomposed into a hierarchy of abstractions: a shared data ab...

We present a design approach for structuring multimodels in an object-oriented framework for physical modeling. This approach is termed object-oriented physical modeling (OOPM). Multimodels have played a key role in permitting a model designer to construct large-scale dynamical models. We have built upon earlier work in multimodeling by specifying how multimodels are deened for object-oriented ...