Texas Register, Volume 28, Number 27, Pages 5001-5448, July 04, 2003 (open access)

Texas Register, Volume 28, Number 27, Pages 5001-5448, July 04, 2003

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: July 4, 2003
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Competing degrees of freedom in nuclear structure theory. Final Report for 1999-2002 (open access)

Competing degrees of freedom in nuclear structure theory. Final Report for 1999-2002

The central focus of this research was the interplay between three generic classes of degrees of freedom relevant to nuclear structure theory: single-particle degrees of freedom, collective degrees of freedom, and statistical degrees of freedom, which can be thought of as an incoherent mean field or a thermal bath.
Date: July 4, 2003
Creator: Johnson, Calvin W.
Object Type: Report
System: The UNT Digital Library
Evaluation of architectural paradigms for addressing theprocessor-memory gap (open access)

Evaluation of architectural paradigms for addressing theprocessor-memory gap

Many high performance applications run well below the peak arithmetic performance of the underlying machine, with inefficiencies often attributed to poor memory system behavior. In the context of scientific computing we examine three emerging processors designed to address the well-known gap between processor and memory performance through the exploitation of data parallelism. The VIRAM architecture uses novel PIM technology to combine embedded DRAM with a vector co-processor for exploiting its large bandwidth potential. The DIVA architecture incorporates a collection of PIM chips as smart-memory coprocessors to a conventional microprocessor, and relies on superword-level parallelism to make effective use of the available memory bandwidth. The Imagine architecture provides a stream-aware memory hierarchy to support the tremendous processing potential of SIMD controlled VLIW clusters. First we develop a scalable synthetic probe that allows us to parametize key performance attributes of VIRAM, DIVA and Imagine while capturing the performance crossover points of these architectures. Next we present results for scientific kernels with different sets of computational characteristics and memory access patterns. Our experiments allow us to evaluate the strategies employed to exploit data parallelism, isolate the set of application characteristics best suited to each architecture and show a promising direction towards interfacing leading-edge …
Date: July 4, 2003
Creator: Oliker, Leonid; Gorden, Grime; Husbands, Parry & Chame, Jacqualine
Object Type: Report
System: The UNT Digital Library