Object oriented data design tool

Author(s):  
R.C. Shock
Author(s):  
Gary A. Gabriele ◽  
Agustî Maria I. Serrano

Abstract The need for superior design tools has lead to the development of better and more complex computer aided design programs. Two of the more important new developments in application tools being investigation are Object Oriented Languages, and HyperMedia. Object Oriented Languages allow the development of CAD tools where the parts being designed and the design procedures specified are conceptualized as objects. This allows for the development of design aids that are non-procedural and more readily manipulated by the user trying to accomplish a design task. HyperMedia allows for the easy inclusion of many different types of data, such as design charts and graphs, into the tool that are normally difficult to include in design tools programmed with more conventional programming languages. This paper explores the development of a computer aided design tool for the design of a single stage gear box using the development HyperCard® environment and the HyperTalk® programming language. The resulting program provides a user friendly interface, the ability to handle several kinds of design information including graphic and textual, and a non-procedural design tool to help the user design simple, one stage gear boxes. Help facilities in the program make it suitable for undergraduate instruction in a machine elements design course.


Author(s):  
Martti Valtonen ◽  
Pauli Heikkila ◽  
Hannu Jokinen ◽  
Timo Veijola

Author(s):  
K.J. FOWLER

Hard real-time digital systems are a small but important segment of the installed software base because of failure impact. Deadline feasibility can be optimally determined in this domain through rate monotonic analysis, but performance is difficult to predict unless design change effects on spare capacity are measured. We measure units of concurrency as formal aggregations of reusable modules. In this manner, object-oriented construction can be compatible with hard real-time response requirements.


2006 ◽  
Vol 2 (4) ◽  
pp. 177-191 ◽  
Author(s):  
Sikha Bagui

In this paper, we provide detailed mapping rules (a methodology) to convert an ER schema into an object relationship (OR) schema. The mapping rules are presented in a manner that will keep as much of the semantics of the database intact, in order to smoothen the important step of data migration from an ER schema to an OR schema. This OR schema should also serve as a conceptual design tool for object-oriented data models, very much like the ER diagrams are a conceptual design tool for relational databases. Since we are mainly discussing the conversion from an ER model to an OR model, we are limiting the discussion in this paper to the structural aspects of the OR model.


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