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Full-Text Articles in Physical Sciences and Mathematics
A Resource Allocation Mechanism Based On Cost Function Synthesis In Complex Systems, Carlos C. Amaro
A Resource Allocation Mechanism Based On Cost Function Synthesis In Complex Systems, Carlos C. Amaro
Dissertations
While the management of resources in computer systems can greatly impact the usefulness and integrity of the system, finding an optimal solution to the management problem is unfortunately NP hard. Adding to the complexity, today's 'modern' systems - such as in multimedia, medical, and military systems - may be, and often are, comprised of interacting real and non-real-time components. In addition, these systems can be driven by a host of non-functional objectives – often differing not only in nature, importance, and form, but also in dimensional units and range, and themselves interacting in complex ways. We refer to systems exhibiting …
Safe Code Transfromations For Speculative Execution In Real-Time Systems, Mohamed Mohamed Younis
Safe Code Transfromations For Speculative Execution In Real-Time Systems, Mohamed Mohamed Younis
Dissertations
Although compiler optimization techniques are standard and successful in non-real-time systems, if naively applied, they can destroy safety guarantees and deadlines in hard real-time systems. For this reason, real-time systems developers have tended to avoid automatic compiler optimization of their code. However, real-time applications in several areas have been growing substantially in size and complexity in recent years. This size and complexity makes it impossible for real-time programmers to write optimal code, and consequently indicates a need for compiler optimization. Recently researchers have developed or modified analyses and transformations to improve performance without degrading worst-case execution times. Moreover, these optimization …
Dmodel And Dalgebra : A Data Model And Algebra For Office Documents, Fortune Solani Mhlanga
Dmodel And Dalgebra : A Data Model And Algebra For Office Documents, Fortune Solani Mhlanga
Dissertations
This dissertation presents a data model (called D_model) and an algebra (called D_ algebra) for office documents. The data model adopts a very natural view of modeling office documents. Documents are grouped into classes; each class is characterized by a "frame template", which describes the properties (or attributes) for the class of documents. A frame template is instantiated by providing it with values to form a "frame instance" which becomes the synopsis of the document of the class associated with the frame template. Different frame instances can be grouped into a folder. Therefore, a folder is a set of frame …