Custom Model

Enhancing UML to Model Custom Security Aspects

Despite its widespread usage, the Unified Modeling Language (UML) specification still lacks formal, explicit, support for access control. This paper proposes an approach to model security as a separate concern by augmenting UML with separate and new diagrams for role-based, discretionary, and mandatory access controls; collectively, these diagrams provide visual access-control aspects. Individu...

WaterBeans: A Custom Component Model and Framework

The development of component-based systems is supported by commercial component technologies such as Sun’s Enterprise JavaBeansTM and Microsoft’s COM+. But these technologies only address the needs of a particular class of systems, one that we might refer to as distribute, transactional enterprise systems. Notwithstanding the significant market size for this class of system, there are many othe...

A Model-View Implementation of Linked Custom Grids in C#

A Stochastic Model for Interconnections in Custom Integrated Circuits

A stochastic model for interconnections in integrated circuits composed of unequal size logic blocks separated by routing channels is described. An algorithm, based on the model, is given for estimating channel widths and chip area. The effectiveness of the algorithm is tested through an example. Applications of the model to placement and routing of integrated circuits are discussed.

A Custom Iii-v Heterojunction Bipolar Transistor Model

Communication systems today comprise the major use of GaAs technology with the highest volumes found in the cellular handset front-end. Here, heterojunction bipolar transistor (HBT) power amplifiers (PA) and Pseudomorphic High Electron Mobility Transistor (PHEMT) switches enjoy a comfortable market share. In this environment, the demands of production design require a robust CAD system with acc...