Award Data

Next-generation high-performance computing (HPC) hardware, such as the Intel Xeon Phi Knights Landing Many-Integrated-Core processor, provide new deep memory architectures that offer the promise of increased performance. The challenge in taking full advantage of this architecture is selecting which data structures will be placed in the high-bandwidth memory. Optimizing data structure placement in ...

Infrasound and seismic measurements are used by DTRA and the DoD for nuclear test monitoring, terrorist blast forensics, battle damage assessment, and environmental monitoring. However, these long wavelength physical signals are typically recorded through single-point sensors or sparse low density arrays. As a result, the critical signals of interest are often corrupted or masked by noise or inter ...

Supercapacitors have attracted considerable recent attentions due to their high-power density, and long cycle life. Unfortunately, the energy density of supercapacitors is too low to meet these applications requiring an energy supply for longer periods (hours or days). Storagenergy Technologies Inc. proposes to develop a superior all solid-state battery (ASSB) fabricated by additive manufacturing ...

A significant performance gap exists between the theoretical number of Floating Point Operations (FLOPS) that a HPC machine is capable of sustaining and the number of FLOPS realized by real-world HPC applications. One of the principle reasons for this gap is the parasitic work that computational processes must do to communicate with one another. It has been shown that this communication work can b ...

Analysis of nuclear material samples in the field has many advantages over laboratory analysis. Laboratory analyses can be slow, involve increased expense, lead to additional waste generation and disposal problems, and may introduce errors due to sample degradation or mishandling. In situ analysis mitigates all of these problems. The specific aim of this project is the development of a truly por ...

A new type of compact induction accelerator currently under development at the Lawrence Livermore National Laboratory (LLNL) promises to increase the average accelerating gradient by at least an order of magnitude over that of existing induction machines. The machine is based on the use of high gradient vacuum insulators and advanced dielectric materials and switches. The system, called the Diel ...

Predicting the response of building components to internal detonations is more complex than the corresponding task for external loads because of the more complex loading waveforms which include multiple reflections in the shock phase followed by a long duration pseudostatic loading that depends upon room venting. Add the possibility of additional impulsive loading from primary debris. We propose t ...

A CONCEPT FEASIBILITY STUDY FOR A SATELLITE-BASED OPTICAL-INFRARED DISTURBED ATMOSPHERE SIGNATURE PROGRAM IS PROPOSED. THE INITIAL CONCEPT IS FOR A POLAR-ORBITING OPTICAL-INFRARED ANALOG TO THE HILAT SATELLITE WHERE-IN A HIGH PROBABILITY OF AURORAL ACQUISITION IS ANTICIPATED. INITIAL TECHNICAL DIFFICULTIES OF CRYOGENIC OPERATION AND EXPECTED LIFETIME ARE DISCUSSED IN TERMS OF THE IRAS SUCCESS. THE ...

PRESHOCKED PRECONDITIONING OF TUFF MAY OCCUR IN TWO MANNERS AT THE NEVADA TEST SITE. FIRST, THE MATERIAL IS "PRESHOCKED" IN A LINEOF-SIGHT TYPE UNDERGROUND NUCLEAR TEST BY THE FIRST WAVE PASSAGE. THE SECOND MANNER MAY OCCUR AS A RESULT OF AREAL SPACE LIMITATIONS WHEN A SECOND EVENT IS SITED WITHIN A REGION OF PRESHOCKED MATERIAL. UNDER CERTAIN LOAD-UNLOADED CONDITIONS THE MATERIAL STRENGTH MAY BE ...

SHEAR DISPLACEMENT ALONG ROCK MASS DISCONTINUITIES (JOINTS) UNDER SATURATED, UNDRAINED CONDITIONS IS ONE OF THE CRITICAL FAILURE MODES FOR A DYNAMICALLY LOADED DEEP BASE STRUCTURE. THE FAILURE MODE HAS NOT BEEN EXPERIMENTALLY SIMULATED FOR DEEP BASE CONDITIONS. THE COMBINED APPLICATION OF NORMAL AND SHEAR STRESSES AT DYNAMIC RATES, WITHOUT PORE PRESSURE DRAINAGE, IS LIKELY TO PRODUCE HIGH PORE PRE ...