Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Atomics"”.
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Efficient coherence and consistency for specialized memory hierarchies
… with fine-grained synchronization, relaxed atomics, and more general sharing patterns. Heterogeneous systems are also difficult to program, which makes it harder for programmers to take advantage of the potential benefits of specialization. This thesis redesigns the memory hierarchy of …
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Specialization without complexity in heterogeneous memory systems
… on the programmer. The second extension, relaxed atomics, allows the programmer to avoid costly ordering constraints when they are unnecessary for functionality, but existing consistency models offer complex and often poorly specified semantics when relaxed atomics are used. Once an appropriate …
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High performance histogramming on massively parallel processors
… in this thesis will outline that the packed atomics histogramming kernel can and usually does outperform other implementations in all but a select number of exceptions.
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Computational neutronics analysis of TRIGA reactors during power pulsing
Training, Research, Isotopes, General Atomics (TRIGA) reactors have the unique capability of generating high neutron flux environments with the removal of a transient control rod, creating conditions observed in fast fission reactors. Recently, several TRIGA reactors have had issues with the …
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A study of prompt fast ion losses from neutral beam injection in the DIII-D tokamak
… was conducted on the DIII-D tokamak at General Atomics using scintillator based fast ion loss detectors (FILD) and a reverse orbit calculation code. Prompt losses, also called first orbit losses, result from injected neutrals that are ionized on orbits that terminate to the outer wall before …
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Rethinking Storage System Design in Distributed NVRAM+RDMA Clusters
… object, while our write protocol exploits remote atomics and non-volatile buffers to silently resolve write contention. For inter-server communication, we present a new distributed communication channel (DCC) that separates control and data communication directly at the RNIC. By using different …
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Theoretical studies of lipid-protein interactions in biological membranes
… in the first instance, linear, hard-core tri-atomics are used to represent the two-dimensional projections of the lipid molecules. Studies on lipid only systems show that the average number of gauche rotations and the cross-sectional area of the lipids decrease with increasing density. There …
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Fast neutron leakage spectra for assemblies containing thorium, D{u2082}O and natural uranium
… supports a recent suggestion by H. Alter of Atomics International that the ENOF/B-II data files contain significant errors in the transport cross-sections for ²³⁸U and that the suspect data are in need of closer examination and revision. As a further test of the applicability of the …
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CFD Modeling and Simulation of Natural Circulation in Helium- Cooled Very High Temperature Reactors
… An experimental facility inspired by the General Atomics 350 MWt Modular High Temperature Gas-Cooled Reactor (MHTGR) was developed at The City College of New York. The setup consists of a plenum-to-plenum flow loop with four riser and four downcomer tubes, each equipped with heating coils, …
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Modelling of Graphite Elements and Low Enriched Fuel Assemblies for a High Temperature Gas-Cooled Reactor
… Gas-cooled Reactor (HC-HTGR), which Boston Atomics is seeking to commercialize. The HC-HTGR leverages the safety advantages of gas- cooled, TRISO fuelled reactors, and the economic advantages of a horizontal compact layout. Graphite assembly blocks create the channels that guide the helium …
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Radiation Shielding Design and Radioactive Waste Assessment of Horizontal Compact High Temperature Gas-Cooled Reactor
… for community and industrial purposes, Boston Atomics LLC initiated the design of Horizontal Compact HTGR (HC-HTGR). This work addresses shielding, activation analysis and the decommissioning cost assessment as an integrated part of the design process. Reinforced regular and borated concrete …
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A MapReduce Framework for Heterogeneous Computing Architectures
Nowadays, an increasing number of computational systems are equipped with heterogeneous compute resources, i.e., following different architecture. This applies to the level of a single chip, a single node and even supercomputers and large-scale clusters. With its impressive price-to-performance …